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1 | /* Remote target communications for serial-line targets in custom GDB protocol | |
2 | ||
3 | Copyright (C) 1988-2017 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | /* See the GDB User Guide for details of the GDB remote protocol. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include <ctype.h> | |
24 | #include <fcntl.h> | |
25 | #include "inferior.h" | |
26 | #include "infrun.h" | |
27 | #include "bfd.h" | |
28 | #include "symfile.h" | |
29 | #include "target.h" | |
30 | /*#include "terminal.h" */ | |
31 | #include "gdbcmd.h" | |
32 | #include "objfiles.h" | |
33 | #include "gdb-stabs.h" | |
34 | #include "gdbthread.h" | |
35 | #include "remote.h" | |
36 | #include "remote-notif.h" | |
37 | #include "regcache.h" | |
38 | #include "value.h" | |
39 | #include "observer.h" | |
40 | #include "solib.h" | |
41 | #include "cli/cli-decode.h" | |
42 | #include "cli/cli-setshow.h" | |
43 | #include "target-descriptions.h" | |
44 | #include "gdb_bfd.h" | |
45 | #include "filestuff.h" | |
46 | #include "rsp-low.h" | |
47 | #include "disasm.h" | |
48 | #include "location.h" | |
49 | ||
50 | #include "gdb_sys_time.h" | |
51 | ||
52 | #include "event-loop.h" | |
53 | #include "event-top.h" | |
54 | #include "inf-loop.h" | |
55 | ||
56 | #include <signal.h> | |
57 | #include "serial.h" | |
58 | ||
59 | #include "gdbcore.h" /* for exec_bfd */ | |
60 | ||
61 | #include "remote-fileio.h" | |
62 | #include "gdb/fileio.h" | |
63 | #include <sys/stat.h> | |
64 | #include "xml-support.h" | |
65 | ||
66 | #include "memory-map.h" | |
67 | ||
68 | #include "tracepoint.h" | |
69 | #include "ax.h" | |
70 | #include "ax-gdb.h" | |
71 | #include "agent.h" | |
72 | #include "btrace.h" | |
73 | #include "record-btrace.h" | |
74 | #include <algorithm> | |
75 | #include "common/scoped_restore.h" | |
76 | #include "environ.h" | |
77 | #include "common/byte-vector.h" | |
78 | ||
79 | /* Per-program-space data key. */ | |
80 | static const struct program_space_data *remote_pspace_data; | |
81 | ||
82 | /* The variable registered as the control variable used by the | |
83 | remote exec-file commands. While the remote exec-file setting is | |
84 | per-program-space, the set/show machinery uses this as the | |
85 | location of the remote exec-file value. */ | |
86 | static char *remote_exec_file_var; | |
87 | ||
88 | /* The size to align memory write packets, when practical. The protocol | |
89 | does not guarantee any alignment, and gdb will generate short | |
90 | writes and unaligned writes, but even as a best-effort attempt this | |
91 | can improve bulk transfers. For instance, if a write is misaligned | |
92 | relative to the target's data bus, the stub may need to make an extra | |
93 | round trip fetching data from the target. This doesn't make a | |
94 | huge difference, but it's easy to do, so we try to be helpful. | |
95 | ||
96 | The alignment chosen is arbitrary; usually data bus width is | |
97 | important here, not the possibly larger cache line size. */ | |
98 | enum { REMOTE_ALIGN_WRITES = 16 }; | |
99 | ||
100 | /* Prototypes for local functions. */ | |
101 | static int getpkt_sane (char **buf, long *sizeof_buf, int forever); | |
102 | static int getpkt_or_notif_sane (char **buf, long *sizeof_buf, | |
103 | int forever, int *is_notif); | |
104 | ||
105 | static void remote_files_info (struct target_ops *ignore); | |
106 | ||
107 | static void remote_prepare_to_store (struct target_ops *self, | |
108 | struct regcache *regcache); | |
109 | ||
110 | static void remote_open_1 (const char *, int, struct target_ops *, | |
111 | int extended_p); | |
112 | ||
113 | static void remote_close (struct target_ops *self); | |
114 | ||
115 | struct remote_state; | |
116 | ||
117 | static int remote_vkill (int pid, struct remote_state *rs); | |
118 | ||
119 | static void remote_kill_k (void); | |
120 | ||
121 | static void remote_mourn (struct target_ops *ops); | |
122 | ||
123 | static void extended_remote_restart (void); | |
124 | ||
125 | static void remote_send (char **buf, long *sizeof_buf_p); | |
126 | ||
127 | static int readchar (int timeout); | |
128 | ||
129 | static void remote_serial_write (const char *str, int len); | |
130 | ||
131 | static void remote_kill (struct target_ops *ops); | |
132 | ||
133 | static int remote_can_async_p (struct target_ops *); | |
134 | ||
135 | static int remote_is_async_p (struct target_ops *); | |
136 | ||
137 | static void remote_async (struct target_ops *ops, int enable); | |
138 | ||
139 | static void remote_thread_events (struct target_ops *ops, int enable); | |
140 | ||
141 | static void interrupt_query (void); | |
142 | ||
143 | static void set_general_thread (ptid_t ptid); | |
144 | static void set_continue_thread (ptid_t ptid); | |
145 | ||
146 | static void get_offsets (void); | |
147 | ||
148 | static void skip_frame (void); | |
149 | ||
150 | static long read_frame (char **buf_p, long *sizeof_buf); | |
151 | ||
152 | static int hexnumlen (ULONGEST num); | |
153 | ||
154 | static void init_remote_ops (void); | |
155 | ||
156 | static void init_extended_remote_ops (void); | |
157 | ||
158 | static void remote_stop (struct target_ops *self, ptid_t); | |
159 | ||
160 | static int stubhex (int ch); | |
161 | ||
162 | static int hexnumstr (char *, ULONGEST); | |
163 | ||
164 | static int hexnumnstr (char *, ULONGEST, int); | |
165 | ||
166 | static CORE_ADDR remote_address_masked (CORE_ADDR); | |
167 | ||
168 | static void print_packet (const char *); | |
169 | ||
170 | static int stub_unpack_int (char *buff, int fieldlength); | |
171 | ||
172 | static ptid_t remote_current_thread (ptid_t oldptid); | |
173 | ||
174 | static int putpkt_binary (const char *buf, int cnt); | |
175 | ||
176 | static void check_binary_download (CORE_ADDR addr); | |
177 | ||
178 | struct packet_config; | |
179 | ||
180 | static void show_packet_config_cmd (struct packet_config *config); | |
181 | ||
182 | static void show_remote_protocol_packet_cmd (struct ui_file *file, | |
183 | int from_tty, | |
184 | struct cmd_list_element *c, | |
185 | const char *value); | |
186 | ||
187 | static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid); | |
188 | static ptid_t read_ptid (const char *buf, const char **obuf); | |
189 | ||
190 | static void remote_set_permissions (struct target_ops *self); | |
191 | ||
192 | static int remote_get_trace_status (struct target_ops *self, | |
193 | struct trace_status *ts); | |
194 | ||
195 | static int remote_upload_tracepoints (struct target_ops *self, | |
196 | struct uploaded_tp **utpp); | |
197 | ||
198 | static int remote_upload_trace_state_variables (struct target_ops *self, | |
199 | struct uploaded_tsv **utsvp); | |
200 | ||
201 | static void remote_query_supported (void); | |
202 | ||
203 | static void remote_check_symbols (void); | |
204 | ||
205 | struct stop_reply; | |
206 | static void stop_reply_xfree (struct stop_reply *); | |
207 | static void remote_parse_stop_reply (char *, struct stop_reply *); | |
208 | static void push_stop_reply (struct stop_reply *); | |
209 | static void discard_pending_stop_replies_in_queue (struct remote_state *); | |
210 | static int peek_stop_reply (ptid_t ptid); | |
211 | ||
212 | struct threads_listing_context; | |
213 | static void remove_new_fork_children (struct threads_listing_context *); | |
214 | ||
215 | static void remote_async_inferior_event_handler (gdb_client_data); | |
216 | ||
217 | static void remote_terminal_ours (struct target_ops *self); | |
218 | ||
219 | static int remote_read_description_p (struct target_ops *target); | |
220 | ||
221 | static void remote_console_output (char *msg); | |
222 | ||
223 | static int remote_supports_cond_breakpoints (struct target_ops *self); | |
224 | ||
225 | static int remote_can_run_breakpoint_commands (struct target_ops *self); | |
226 | ||
227 | static void remote_btrace_reset (void); | |
228 | ||
229 | static void remote_btrace_maybe_reopen (void); | |
230 | ||
231 | static int stop_reply_queue_length (void); | |
232 | ||
233 | static void readahead_cache_invalidate (void); | |
234 | ||
235 | static void remote_unpush_and_throw (void); | |
236 | ||
237 | static struct remote_state *get_remote_state (void); | |
238 | ||
239 | /* For "remote". */ | |
240 | ||
241 | static struct cmd_list_element *remote_cmdlist; | |
242 | ||
243 | /* For "set remote" and "show remote". */ | |
244 | ||
245 | static struct cmd_list_element *remote_set_cmdlist; | |
246 | static struct cmd_list_element *remote_show_cmdlist; | |
247 | ||
248 | /* Stub vCont actions support. | |
249 | ||
250 | Each field is a boolean flag indicating whether the stub reports | |
251 | support for the corresponding action. */ | |
252 | ||
253 | struct vCont_action_support | |
254 | { | |
255 | /* vCont;t */ | |
256 | int t; | |
257 | ||
258 | /* vCont;r */ | |
259 | int r; | |
260 | ||
261 | /* vCont;s */ | |
262 | int s; | |
263 | ||
264 | /* vCont;S */ | |
265 | int S; | |
266 | }; | |
267 | ||
268 | /* Controls whether GDB is willing to use range stepping. */ | |
269 | ||
270 | static int use_range_stepping = 1; | |
271 | ||
272 | #define OPAQUETHREADBYTES 8 | |
273 | ||
274 | /* a 64 bit opaque identifier */ | |
275 | typedef unsigned char threadref[OPAQUETHREADBYTES]; | |
276 | ||
277 | /* About this many threadisds fit in a packet. */ | |
278 | ||
279 | #define MAXTHREADLISTRESULTS 32 | |
280 | ||
281 | /* The max number of chars in debug output. The rest of chars are | |
282 | omitted. */ | |
283 | ||
284 | #define REMOTE_DEBUG_MAX_CHAR 512 | |
285 | ||
286 | /* Data for the vFile:pread readahead cache. */ | |
287 | ||
288 | struct readahead_cache | |
289 | { | |
290 | /* The file descriptor for the file that is being cached. -1 if the | |
291 | cache is invalid. */ | |
292 | int fd; | |
293 | ||
294 | /* The offset into the file that the cache buffer corresponds | |
295 | to. */ | |
296 | ULONGEST offset; | |
297 | ||
298 | /* The buffer holding the cache contents. */ | |
299 | gdb_byte *buf; | |
300 | /* The buffer's size. We try to read as much as fits into a packet | |
301 | at a time. */ | |
302 | size_t bufsize; | |
303 | ||
304 | /* Cache hit and miss counters. */ | |
305 | ULONGEST hit_count; | |
306 | ULONGEST miss_count; | |
307 | }; | |
308 | ||
309 | /* Description of the remote protocol state for the currently | |
310 | connected target. This is per-target state, and independent of the | |
311 | selected architecture. */ | |
312 | ||
313 | struct remote_state | |
314 | { | |
315 | /* A buffer to use for incoming packets, and its current size. The | |
316 | buffer is grown dynamically for larger incoming packets. | |
317 | Outgoing packets may also be constructed in this buffer. | |
318 | BUF_SIZE is always at least REMOTE_PACKET_SIZE; | |
319 | REMOTE_PACKET_SIZE should be used to limit the length of outgoing | |
320 | packets. */ | |
321 | char *buf; | |
322 | long buf_size; | |
323 | ||
324 | /* True if we're going through initial connection setup (finding out | |
325 | about the remote side's threads, relocating symbols, etc.). */ | |
326 | int starting_up; | |
327 | ||
328 | /* If we negotiated packet size explicitly (and thus can bypass | |
329 | heuristics for the largest packet size that will not overflow | |
330 | a buffer in the stub), this will be set to that packet size. | |
331 | Otherwise zero, meaning to use the guessed size. */ | |
332 | long explicit_packet_size; | |
333 | ||
334 | /* remote_wait is normally called when the target is running and | |
335 | waits for a stop reply packet. But sometimes we need to call it | |
336 | when the target is already stopped. We can send a "?" packet | |
337 | and have remote_wait read the response. Or, if we already have | |
338 | the response, we can stash it in BUF and tell remote_wait to | |
339 | skip calling getpkt. This flag is set when BUF contains a | |
340 | stop reply packet and the target is not waiting. */ | |
341 | int cached_wait_status; | |
342 | ||
343 | /* True, if in no ack mode. That is, neither GDB nor the stub will | |
344 | expect acks from each other. The connection is assumed to be | |
345 | reliable. */ | |
346 | int noack_mode; | |
347 | ||
348 | /* True if we're connected in extended remote mode. */ | |
349 | int extended; | |
350 | ||
351 | /* True if we resumed the target and we're waiting for the target to | |
352 | stop. In the mean time, we can't start another command/query. | |
353 | The remote server wouldn't be ready to process it, so we'd | |
354 | timeout waiting for a reply that would never come and eventually | |
355 | we'd close the connection. This can happen in asynchronous mode | |
356 | because we allow GDB commands while the target is running. */ | |
357 | int waiting_for_stop_reply; | |
358 | ||
359 | /* The status of the stub support for the various vCont actions. */ | |
360 | struct vCont_action_support supports_vCont; | |
361 | ||
362 | /* Nonzero if the user has pressed Ctrl-C, but the target hasn't | |
363 | responded to that. */ | |
364 | int ctrlc_pending_p; | |
365 | ||
366 | /* True if we saw a Ctrl-C while reading or writing from/to the | |
367 | remote descriptor. At that point it is not safe to send a remote | |
368 | interrupt packet, so we instead remember we saw the Ctrl-C and | |
369 | process it once we're done with sending/receiving the current | |
370 | packet, which should be shortly. If however that takes too long, | |
371 | and the user presses Ctrl-C again, we offer to disconnect. */ | |
372 | int got_ctrlc_during_io; | |
373 | ||
374 | /* Descriptor for I/O to remote machine. Initialize it to NULL so that | |
375 | remote_open knows that we don't have a file open when the program | |
376 | starts. */ | |
377 | struct serial *remote_desc; | |
378 | ||
379 | /* These are the threads which we last sent to the remote system. The | |
380 | TID member will be -1 for all or -2 for not sent yet. */ | |
381 | ptid_t general_thread; | |
382 | ptid_t continue_thread; | |
383 | ||
384 | /* This is the traceframe which we last selected on the remote system. | |
385 | It will be -1 if no traceframe is selected. */ | |
386 | int remote_traceframe_number; | |
387 | ||
388 | char *last_pass_packet; | |
389 | ||
390 | /* The last QProgramSignals packet sent to the target. We bypass | |
391 | sending a new program signals list down to the target if the new | |
392 | packet is exactly the same as the last we sent. IOW, we only let | |
393 | the target know about program signals list changes. */ | |
394 | char *last_program_signals_packet; | |
395 | ||
396 | enum gdb_signal last_sent_signal; | |
397 | ||
398 | int last_sent_step; | |
399 | ||
400 | /* The execution direction of the last resume we got. */ | |
401 | enum exec_direction_kind last_resume_exec_dir; | |
402 | ||
403 | char *finished_object; | |
404 | char *finished_annex; | |
405 | ULONGEST finished_offset; | |
406 | ||
407 | /* Should we try the 'ThreadInfo' query packet? | |
408 | ||
409 | This variable (NOT available to the user: auto-detect only!) | |
410 | determines whether GDB will use the new, simpler "ThreadInfo" | |
411 | query or the older, more complex syntax for thread queries. | |
412 | This is an auto-detect variable (set to true at each connect, | |
413 | and set to false when the target fails to recognize it). */ | |
414 | int use_threadinfo_query; | |
415 | int use_threadextra_query; | |
416 | ||
417 | threadref echo_nextthread; | |
418 | threadref nextthread; | |
419 | threadref resultthreadlist[MAXTHREADLISTRESULTS]; | |
420 | ||
421 | /* The state of remote notification. */ | |
422 | struct remote_notif_state *notif_state; | |
423 | ||
424 | /* The branch trace configuration. */ | |
425 | struct btrace_config btrace_config; | |
426 | ||
427 | /* The argument to the last "vFile:setfs:" packet we sent, used | |
428 | to avoid sending repeated unnecessary "vFile:setfs:" packets. | |
429 | Initialized to -1 to indicate that no "vFile:setfs:" packet | |
430 | has yet been sent. */ | |
431 | int fs_pid; | |
432 | ||
433 | /* A readahead cache for vFile:pread. Often, reading a binary | |
434 | involves a sequence of small reads. E.g., when parsing an ELF | |
435 | file. A readahead cache helps mostly the case of remote | |
436 | debugging on a connection with higher latency, due to the | |
437 | request/reply nature of the RSP. We only cache data for a single | |
438 | file descriptor at a time. */ | |
439 | struct readahead_cache readahead_cache; | |
440 | }; | |
441 | ||
442 | /* Private data that we'll store in (struct thread_info)->private. */ | |
443 | struct private_thread_info | |
444 | { | |
445 | char *extra; | |
446 | char *name; | |
447 | int core; | |
448 | ||
449 | /* Thread handle, perhaps a pthread_t or thread_t value, stored as a | |
450 | sequence of bytes. */ | |
451 | gdb::byte_vector *thread_handle; | |
452 | ||
453 | /* Whether the target stopped for a breakpoint/watchpoint. */ | |
454 | enum target_stop_reason stop_reason; | |
455 | ||
456 | /* This is set to the data address of the access causing the target | |
457 | to stop for a watchpoint. */ | |
458 | CORE_ADDR watch_data_address; | |
459 | ||
460 | /* Fields used by the vCont action coalescing implemented in | |
461 | remote_resume / remote_commit_resume. remote_resume stores each | |
462 | thread's last resume request in these fields, so that a later | |
463 | remote_commit_resume knows which is the proper action for this | |
464 | thread to include in the vCont packet. */ | |
465 | ||
466 | /* True if the last target_resume call for this thread was a step | |
467 | request, false if a continue request. */ | |
468 | int last_resume_step; | |
469 | ||
470 | /* The signal specified in the last target_resume call for this | |
471 | thread. */ | |
472 | enum gdb_signal last_resume_sig; | |
473 | ||
474 | /* Whether this thread was already vCont-resumed on the remote | |
475 | side. */ | |
476 | int vcont_resumed; | |
477 | }; | |
478 | ||
479 | static void | |
480 | free_private_thread_info (struct private_thread_info *info) | |
481 | { | |
482 | xfree (info->extra); | |
483 | xfree (info->name); | |
484 | delete info->thread_handle; | |
485 | xfree (info); | |
486 | } | |
487 | ||
488 | /* This data could be associated with a target, but we do not always | |
489 | have access to the current target when we need it, so for now it is | |
490 | static. This will be fine for as long as only one target is in use | |
491 | at a time. */ | |
492 | static struct remote_state *remote_state; | |
493 | ||
494 | static struct remote_state * | |
495 | get_remote_state_raw (void) | |
496 | { | |
497 | return remote_state; | |
498 | } | |
499 | ||
500 | /* Allocate a new struct remote_state with xmalloc, initialize it, and | |
501 | return it. */ | |
502 | ||
503 | static struct remote_state * | |
504 | new_remote_state (void) | |
505 | { | |
506 | struct remote_state *result = XCNEW (struct remote_state); | |
507 | ||
508 | /* The default buffer size is unimportant; it will be expanded | |
509 | whenever a larger buffer is needed. */ | |
510 | result->buf_size = 400; | |
511 | result->buf = (char *) xmalloc (result->buf_size); | |
512 | result->remote_traceframe_number = -1; | |
513 | result->last_sent_signal = GDB_SIGNAL_0; | |
514 | result->last_resume_exec_dir = EXEC_FORWARD; | |
515 | result->fs_pid = -1; | |
516 | ||
517 | return result; | |
518 | } | |
519 | ||
520 | /* Description of the remote protocol for a given architecture. */ | |
521 | ||
522 | struct packet_reg | |
523 | { | |
524 | long offset; /* Offset into G packet. */ | |
525 | long regnum; /* GDB's internal register number. */ | |
526 | LONGEST pnum; /* Remote protocol register number. */ | |
527 | int in_g_packet; /* Always part of G packet. */ | |
528 | /* long size in bytes; == register_size (target_gdbarch (), regnum); | |
529 | at present. */ | |
530 | /* char *name; == gdbarch_register_name (target_gdbarch (), regnum); | |
531 | at present. */ | |
532 | }; | |
533 | ||
534 | struct remote_arch_state | |
535 | { | |
536 | /* Description of the remote protocol registers. */ | |
537 | long sizeof_g_packet; | |
538 | ||
539 | /* Description of the remote protocol registers indexed by REGNUM | |
540 | (making an array gdbarch_num_regs in size). */ | |
541 | struct packet_reg *regs; | |
542 | ||
543 | /* This is the size (in chars) of the first response to the ``g'' | |
544 | packet. It is used as a heuristic when determining the maximum | |
545 | size of memory-read and memory-write packets. A target will | |
546 | typically only reserve a buffer large enough to hold the ``g'' | |
547 | packet. The size does not include packet overhead (headers and | |
548 | trailers). */ | |
549 | long actual_register_packet_size; | |
550 | ||
551 | /* This is the maximum size (in chars) of a non read/write packet. | |
552 | It is also used as a cap on the size of read/write packets. */ | |
553 | long remote_packet_size; | |
554 | }; | |
555 | ||
556 | /* Utility: generate error from an incoming stub packet. */ | |
557 | static void | |
558 | trace_error (char *buf) | |
559 | { | |
560 | if (*buf++ != 'E') | |
561 | return; /* not an error msg */ | |
562 | switch (*buf) | |
563 | { | |
564 | case '1': /* malformed packet error */ | |
565 | if (*++buf == '0') /* general case: */ | |
566 | error (_("remote.c: error in outgoing packet.")); | |
567 | else | |
568 | error (_("remote.c: error in outgoing packet at field #%ld."), | |
569 | strtol (buf, NULL, 16)); | |
570 | default: | |
571 | error (_("Target returns error code '%s'."), buf); | |
572 | } | |
573 | } | |
574 | ||
575 | /* Utility: wait for reply from stub, while accepting "O" packets. */ | |
576 | ||
577 | static char * | |
578 | remote_get_noisy_reply () | |
579 | { | |
580 | struct remote_state *rs = get_remote_state (); | |
581 | ||
582 | do /* Loop on reply from remote stub. */ | |
583 | { | |
584 | char *buf; | |
585 | ||
586 | QUIT; /* Allow user to bail out with ^C. */ | |
587 | getpkt (&rs->buf, &rs->buf_size, 0); | |
588 | buf = rs->buf; | |
589 | if (buf[0] == 'E') | |
590 | trace_error (buf); | |
591 | else if (startswith (buf, "qRelocInsn:")) | |
592 | { | |
593 | ULONGEST ul; | |
594 | CORE_ADDR from, to, org_to; | |
595 | const char *p, *pp; | |
596 | int adjusted_size = 0; | |
597 | int relocated = 0; | |
598 | ||
599 | p = buf + strlen ("qRelocInsn:"); | |
600 | pp = unpack_varlen_hex (p, &ul); | |
601 | if (*pp != ';') | |
602 | error (_("invalid qRelocInsn packet: %s"), buf); | |
603 | from = ul; | |
604 | ||
605 | p = pp + 1; | |
606 | unpack_varlen_hex (p, &ul); | |
607 | to = ul; | |
608 | ||
609 | org_to = to; | |
610 | ||
611 | TRY | |
612 | { | |
613 | gdbarch_relocate_instruction (target_gdbarch (), &to, from); | |
614 | relocated = 1; | |
615 | } | |
616 | CATCH (ex, RETURN_MASK_ALL) | |
617 | { | |
618 | if (ex.error == MEMORY_ERROR) | |
619 | { | |
620 | /* Propagate memory errors silently back to the | |
621 | target. The stub may have limited the range of | |
622 | addresses we can write to, for example. */ | |
623 | } | |
624 | else | |
625 | { | |
626 | /* Something unexpectedly bad happened. Be verbose | |
627 | so we can tell what, and propagate the error back | |
628 | to the stub, so it doesn't get stuck waiting for | |
629 | a response. */ | |
630 | exception_fprintf (gdb_stderr, ex, | |
631 | _("warning: relocating instruction: ")); | |
632 | } | |
633 | putpkt ("E01"); | |
634 | } | |
635 | END_CATCH | |
636 | ||
637 | if (relocated) | |
638 | { | |
639 | adjusted_size = to - org_to; | |
640 | ||
641 | xsnprintf (buf, rs->buf_size, "qRelocInsn:%x", adjusted_size); | |
642 | putpkt (buf); | |
643 | } | |
644 | } | |
645 | else if (buf[0] == 'O' && buf[1] != 'K') | |
646 | remote_console_output (buf + 1); /* 'O' message from stub */ | |
647 | else | |
648 | return buf; /* Here's the actual reply. */ | |
649 | } | |
650 | while (1); | |
651 | } | |
652 | ||
653 | /* Handle for retreving the remote protocol data from gdbarch. */ | |
654 | static struct gdbarch_data *remote_gdbarch_data_handle; | |
655 | ||
656 | static struct remote_arch_state * | |
657 | get_remote_arch_state (struct gdbarch *gdbarch) | |
658 | { | |
659 | gdb_assert (gdbarch != NULL); | |
660 | return ((struct remote_arch_state *) | |
661 | gdbarch_data (gdbarch, remote_gdbarch_data_handle)); | |
662 | } | |
663 | ||
664 | /* Fetch the global remote target state. */ | |
665 | ||
666 | static struct remote_state * | |
667 | get_remote_state (void) | |
668 | { | |
669 | /* Make sure that the remote architecture state has been | |
670 | initialized, because doing so might reallocate rs->buf. Any | |
671 | function which calls getpkt also needs to be mindful of changes | |
672 | to rs->buf, but this call limits the number of places which run | |
673 | into trouble. */ | |
674 | get_remote_arch_state (target_gdbarch ()); | |
675 | ||
676 | return get_remote_state_raw (); | |
677 | } | |
678 | ||
679 | /* Cleanup routine for the remote module's pspace data. */ | |
680 | ||
681 | static void | |
682 | remote_pspace_data_cleanup (struct program_space *pspace, void *arg) | |
683 | { | |
684 | char *remote_exec_file = (char *) arg; | |
685 | ||
686 | xfree (remote_exec_file); | |
687 | } | |
688 | ||
689 | /* Fetch the remote exec-file from the current program space. */ | |
690 | ||
691 | static const char * | |
692 | get_remote_exec_file (void) | |
693 | { | |
694 | char *remote_exec_file; | |
695 | ||
696 | remote_exec_file | |
697 | = (char *) program_space_data (current_program_space, | |
698 | remote_pspace_data); | |
699 | if (remote_exec_file == NULL) | |
700 | return ""; | |
701 | ||
702 | return remote_exec_file; | |
703 | } | |
704 | ||
705 | /* Set the remote exec file for PSPACE. */ | |
706 | ||
707 | static void | |
708 | set_pspace_remote_exec_file (struct program_space *pspace, | |
709 | char *remote_exec_file) | |
710 | { | |
711 | char *old_file = (char *) program_space_data (pspace, remote_pspace_data); | |
712 | ||
713 | xfree (old_file); | |
714 | set_program_space_data (pspace, remote_pspace_data, | |
715 | xstrdup (remote_exec_file)); | |
716 | } | |
717 | ||
718 | /* The "set/show remote exec-file" set command hook. */ | |
719 | ||
720 | static void | |
721 | set_remote_exec_file (char *ignored, int from_tty, | |
722 | struct cmd_list_element *c) | |
723 | { | |
724 | gdb_assert (remote_exec_file_var != NULL); | |
725 | set_pspace_remote_exec_file (current_program_space, remote_exec_file_var); | |
726 | } | |
727 | ||
728 | /* The "set/show remote exec-file" show command hook. */ | |
729 | ||
730 | static void | |
731 | show_remote_exec_file (struct ui_file *file, int from_tty, | |
732 | struct cmd_list_element *cmd, const char *value) | |
733 | { | |
734 | fprintf_filtered (file, "%s\n", remote_exec_file_var); | |
735 | } | |
736 | ||
737 | static int | |
738 | compare_pnums (const void *lhs_, const void *rhs_) | |
739 | { | |
740 | const struct packet_reg * const *lhs | |
741 | = (const struct packet_reg * const *) lhs_; | |
742 | const struct packet_reg * const *rhs | |
743 | = (const struct packet_reg * const *) rhs_; | |
744 | ||
745 | if ((*lhs)->pnum < (*rhs)->pnum) | |
746 | return -1; | |
747 | else if ((*lhs)->pnum == (*rhs)->pnum) | |
748 | return 0; | |
749 | else | |
750 | return 1; | |
751 | } | |
752 | ||
753 | static int | |
754 | map_regcache_remote_table (struct gdbarch *gdbarch, struct packet_reg *regs) | |
755 | { | |
756 | int regnum, num_remote_regs, offset; | |
757 | struct packet_reg **remote_regs; | |
758 | ||
759 | for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++) | |
760 | { | |
761 | struct packet_reg *r = ®s[regnum]; | |
762 | ||
763 | if (register_size (gdbarch, regnum) == 0) | |
764 | /* Do not try to fetch zero-sized (placeholder) registers. */ | |
765 | r->pnum = -1; | |
766 | else | |
767 | r->pnum = gdbarch_remote_register_number (gdbarch, regnum); | |
768 | ||
769 | r->regnum = regnum; | |
770 | } | |
771 | ||
772 | /* Define the g/G packet format as the contents of each register | |
773 | with a remote protocol number, in order of ascending protocol | |
774 | number. */ | |
775 | ||
776 | remote_regs = XALLOCAVEC (struct packet_reg *, gdbarch_num_regs (gdbarch)); | |
777 | for (num_remote_regs = 0, regnum = 0; | |
778 | regnum < gdbarch_num_regs (gdbarch); | |
779 | regnum++) | |
780 | if (regs[regnum].pnum != -1) | |
781 | remote_regs[num_remote_regs++] = ®s[regnum]; | |
782 | ||
783 | qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *), | |
784 | compare_pnums); | |
785 | ||
786 | for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++) | |
787 | { | |
788 | remote_regs[regnum]->in_g_packet = 1; | |
789 | remote_regs[regnum]->offset = offset; | |
790 | offset += register_size (gdbarch, remote_regs[regnum]->regnum); | |
791 | } | |
792 | ||
793 | return offset; | |
794 | } | |
795 | ||
796 | /* Given the architecture described by GDBARCH, return the remote | |
797 | protocol register's number and the register's offset in the g/G | |
798 | packets of GDB register REGNUM, in PNUM and POFFSET respectively. | |
799 | If the target does not have a mapping for REGNUM, return false, | |
800 | otherwise, return true. */ | |
801 | ||
802 | int | |
803 | remote_register_number_and_offset (struct gdbarch *gdbarch, int regnum, | |
804 | int *pnum, int *poffset) | |
805 | { | |
806 | gdb_assert (regnum < gdbarch_num_regs (gdbarch)); | |
807 | ||
808 | std::vector<packet_reg> regs (gdbarch_num_regs (gdbarch)); | |
809 | ||
810 | map_regcache_remote_table (gdbarch, regs.data ()); | |
811 | ||
812 | *pnum = regs[regnum].pnum; | |
813 | *poffset = regs[regnum].offset; | |
814 | ||
815 | return *pnum != -1; | |
816 | } | |
817 | ||
818 | static void * | |
819 | init_remote_state (struct gdbarch *gdbarch) | |
820 | { | |
821 | struct remote_state *rs = get_remote_state_raw (); | |
822 | struct remote_arch_state *rsa; | |
823 | ||
824 | rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state); | |
825 | ||
826 | /* Use the architecture to build a regnum<->pnum table, which will be | |
827 | 1:1 unless a feature set specifies otherwise. */ | |
828 | rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch, | |
829 | gdbarch_num_regs (gdbarch), | |
830 | struct packet_reg); | |
831 | ||
832 | /* Record the maximum possible size of the g packet - it may turn out | |
833 | to be smaller. */ | |
834 | rsa->sizeof_g_packet = map_regcache_remote_table (gdbarch, rsa->regs); | |
835 | ||
836 | /* Default maximum number of characters in a packet body. Many | |
837 | remote stubs have a hardwired buffer size of 400 bytes | |
838 | (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used | |
839 | as the maximum packet-size to ensure that the packet and an extra | |
840 | NUL character can always fit in the buffer. This stops GDB | |
841 | trashing stubs that try to squeeze an extra NUL into what is | |
842 | already a full buffer (As of 1999-12-04 that was most stubs). */ | |
843 | rsa->remote_packet_size = 400 - 1; | |
844 | ||
845 | /* This one is filled in when a ``g'' packet is received. */ | |
846 | rsa->actual_register_packet_size = 0; | |
847 | ||
848 | /* Should rsa->sizeof_g_packet needs more space than the | |
849 | default, adjust the size accordingly. Remember that each byte is | |
850 | encoded as two characters. 32 is the overhead for the packet | |
851 | header / footer. NOTE: cagney/1999-10-26: I suspect that 8 | |
852 | (``$NN:G...#NN'') is a better guess, the below has been padded a | |
853 | little. */ | |
854 | if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2)) | |
855 | rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32); | |
856 | ||
857 | /* Make sure that the packet buffer is plenty big enough for | |
858 | this architecture. */ | |
859 | if (rs->buf_size < rsa->remote_packet_size) | |
860 | { | |
861 | rs->buf_size = 2 * rsa->remote_packet_size; | |
862 | rs->buf = (char *) xrealloc (rs->buf, rs->buf_size); | |
863 | } | |
864 | ||
865 | return rsa; | |
866 | } | |
867 | ||
868 | /* Return the current allowed size of a remote packet. This is | |
869 | inferred from the current architecture, and should be used to | |
870 | limit the length of outgoing packets. */ | |
871 | static long | |
872 | get_remote_packet_size (void) | |
873 | { | |
874 | struct remote_state *rs = get_remote_state (); | |
875 | remote_arch_state *rsa = get_remote_arch_state (target_gdbarch ()); | |
876 | ||
877 | if (rs->explicit_packet_size) | |
878 | return rs->explicit_packet_size; | |
879 | ||
880 | return rsa->remote_packet_size; | |
881 | } | |
882 | ||
883 | static struct packet_reg * | |
884 | packet_reg_from_regnum (struct gdbarch *gdbarch, struct remote_arch_state *rsa, | |
885 | long regnum) | |
886 | { | |
887 | if (regnum < 0 && regnum >= gdbarch_num_regs (gdbarch)) | |
888 | return NULL; | |
889 | else | |
890 | { | |
891 | struct packet_reg *r = &rsa->regs[regnum]; | |
892 | ||
893 | gdb_assert (r->regnum == regnum); | |
894 | return r; | |
895 | } | |
896 | } | |
897 | ||
898 | static struct packet_reg * | |
899 | packet_reg_from_pnum (struct gdbarch *gdbarch, struct remote_arch_state *rsa, | |
900 | LONGEST pnum) | |
901 | { | |
902 | int i; | |
903 | ||
904 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) | |
905 | { | |
906 | struct packet_reg *r = &rsa->regs[i]; | |
907 | ||
908 | if (r->pnum == pnum) | |
909 | return r; | |
910 | } | |
911 | return NULL; | |
912 | } | |
913 | ||
914 | static struct target_ops remote_ops; | |
915 | ||
916 | static struct target_ops extended_remote_ops; | |
917 | ||
918 | /* FIXME: cagney/1999-09-23: Even though getpkt was called with | |
919 | ``forever'' still use the normal timeout mechanism. This is | |
920 | currently used by the ASYNC code to guarentee that target reads | |
921 | during the initial connect always time-out. Once getpkt has been | |
922 | modified to return a timeout indication and, in turn | |
923 | remote_wait()/wait_for_inferior() have gained a timeout parameter | |
924 | this can go away. */ | |
925 | static int wait_forever_enabled_p = 1; | |
926 | ||
927 | /* Allow the user to specify what sequence to send to the remote | |
928 | when he requests a program interruption: Although ^C is usually | |
929 | what remote systems expect (this is the default, here), it is | |
930 | sometimes preferable to send a break. On other systems such | |
931 | as the Linux kernel, a break followed by g, which is Magic SysRq g | |
932 | is required in order to interrupt the execution. */ | |
933 | const char interrupt_sequence_control_c[] = "Ctrl-C"; | |
934 | const char interrupt_sequence_break[] = "BREAK"; | |
935 | const char interrupt_sequence_break_g[] = "BREAK-g"; | |
936 | static const char *const interrupt_sequence_modes[] = | |
937 | { | |
938 | interrupt_sequence_control_c, | |
939 | interrupt_sequence_break, | |
940 | interrupt_sequence_break_g, | |
941 | NULL | |
942 | }; | |
943 | static const char *interrupt_sequence_mode = interrupt_sequence_control_c; | |
944 | ||
945 | static void | |
946 | show_interrupt_sequence (struct ui_file *file, int from_tty, | |
947 | struct cmd_list_element *c, | |
948 | const char *value) | |
949 | { | |
950 | if (interrupt_sequence_mode == interrupt_sequence_control_c) | |
951 | fprintf_filtered (file, | |
952 | _("Send the ASCII ETX character (Ctrl-c) " | |
953 | "to the remote target to interrupt the " | |
954 | "execution of the program.\n")); | |
955 | else if (interrupt_sequence_mode == interrupt_sequence_break) | |
956 | fprintf_filtered (file, | |
957 | _("send a break signal to the remote target " | |
958 | "to interrupt the execution of the program.\n")); | |
959 | else if (interrupt_sequence_mode == interrupt_sequence_break_g) | |
960 | fprintf_filtered (file, | |
961 | _("Send a break signal and 'g' a.k.a. Magic SysRq g to " | |
962 | "the remote target to interrupt the execution " | |
963 | "of Linux kernel.\n")); | |
964 | else | |
965 | internal_error (__FILE__, __LINE__, | |
966 | _("Invalid value for interrupt_sequence_mode: %s."), | |
967 | interrupt_sequence_mode); | |
968 | } | |
969 | ||
970 | /* This boolean variable specifies whether interrupt_sequence is sent | |
971 | to the remote target when gdb connects to it. | |
972 | This is mostly needed when you debug the Linux kernel: The Linux kernel | |
973 | expects BREAK g which is Magic SysRq g for connecting gdb. */ | |
974 | static int interrupt_on_connect = 0; | |
975 | ||
976 | /* This variable is used to implement the "set/show remotebreak" commands. | |
977 | Since these commands are now deprecated in favor of "set/show remote | |
978 | interrupt-sequence", it no longer has any effect on the code. */ | |
979 | static int remote_break; | |
980 | ||
981 | static void | |
982 | set_remotebreak (char *args, int from_tty, struct cmd_list_element *c) | |
983 | { | |
984 | if (remote_break) | |
985 | interrupt_sequence_mode = interrupt_sequence_break; | |
986 | else | |
987 | interrupt_sequence_mode = interrupt_sequence_control_c; | |
988 | } | |
989 | ||
990 | static void | |
991 | show_remotebreak (struct ui_file *file, int from_tty, | |
992 | struct cmd_list_element *c, | |
993 | const char *value) | |
994 | { | |
995 | } | |
996 | ||
997 | /* This variable sets the number of bits in an address that are to be | |
998 | sent in a memory ("M" or "m") packet. Normally, after stripping | |
999 | leading zeros, the entire address would be sent. This variable | |
1000 | restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The | |
1001 | initial implementation of remote.c restricted the address sent in | |
1002 | memory packets to ``host::sizeof long'' bytes - (typically 32 | |
1003 | bits). Consequently, for 64 bit targets, the upper 32 bits of an | |
1004 | address was never sent. Since fixing this bug may cause a break in | |
1005 | some remote targets this variable is principly provided to | |
1006 | facilitate backward compatibility. */ | |
1007 | ||
1008 | static unsigned int remote_address_size; | |
1009 | ||
1010 | \f | |
1011 | /* User configurable variables for the number of characters in a | |
1012 | memory read/write packet. MIN (rsa->remote_packet_size, | |
1013 | rsa->sizeof_g_packet) is the default. Some targets need smaller | |
1014 | values (fifo overruns, et.al.) and some users need larger values | |
1015 | (speed up transfers). The variables ``preferred_*'' (the user | |
1016 | request), ``current_*'' (what was actually set) and ``forced_*'' | |
1017 | (Positive - a soft limit, negative - a hard limit). */ | |
1018 | ||
1019 | struct memory_packet_config | |
1020 | { | |
1021 | const char *name; | |
1022 | long size; | |
1023 | int fixed_p; | |
1024 | }; | |
1025 | ||
1026 | /* The default max memory-write-packet-size. The 16k is historical. | |
1027 | (It came from older GDB's using alloca for buffers and the | |
1028 | knowledge (folklore?) that some hosts don't cope very well with | |
1029 | large alloca calls.) */ | |
1030 | #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384 | |
1031 | ||
1032 | /* The minimum remote packet size for memory transfers. Ensures we | |
1033 | can write at least one byte. */ | |
1034 | #define MIN_MEMORY_PACKET_SIZE 20 | |
1035 | ||
1036 | /* Compute the current size of a read/write packet. Since this makes | |
1037 | use of ``actual_register_packet_size'' the computation is dynamic. */ | |
1038 | ||
1039 | static long | |
1040 | get_memory_packet_size (struct memory_packet_config *config) | |
1041 | { | |
1042 | struct remote_state *rs = get_remote_state (); | |
1043 | remote_arch_state *rsa = get_remote_arch_state (target_gdbarch ()); | |
1044 | ||
1045 | long what_they_get; | |
1046 | if (config->fixed_p) | |
1047 | { | |
1048 | if (config->size <= 0) | |
1049 | what_they_get = DEFAULT_MAX_MEMORY_PACKET_SIZE; | |
1050 | else | |
1051 | what_they_get = config->size; | |
1052 | } | |
1053 | else | |
1054 | { | |
1055 | what_they_get = get_remote_packet_size (); | |
1056 | /* Limit the packet to the size specified by the user. */ | |
1057 | if (config->size > 0 | |
1058 | && what_they_get > config->size) | |
1059 | what_they_get = config->size; | |
1060 | ||
1061 | /* Limit it to the size of the targets ``g'' response unless we have | |
1062 | permission from the stub to use a larger packet size. */ | |
1063 | if (rs->explicit_packet_size == 0 | |
1064 | && rsa->actual_register_packet_size > 0 | |
1065 | && what_they_get > rsa->actual_register_packet_size) | |
1066 | what_they_get = rsa->actual_register_packet_size; | |
1067 | } | |
1068 | if (what_they_get < MIN_MEMORY_PACKET_SIZE) | |
1069 | what_they_get = MIN_MEMORY_PACKET_SIZE; | |
1070 | ||
1071 | /* Make sure there is room in the global buffer for this packet | |
1072 | (including its trailing NUL byte). */ | |
1073 | if (rs->buf_size < what_they_get + 1) | |
1074 | { | |
1075 | rs->buf_size = 2 * what_they_get; | |
1076 | rs->buf = (char *) xrealloc (rs->buf, 2 * what_they_get); | |
1077 | } | |
1078 | ||
1079 | return what_they_get; | |
1080 | } | |
1081 | ||
1082 | /* Update the size of a read/write packet. If they user wants | |
1083 | something really big then do a sanity check. */ | |
1084 | ||
1085 | static void | |
1086 | set_memory_packet_size (const char *args, struct memory_packet_config *config) | |
1087 | { | |
1088 | int fixed_p = config->fixed_p; | |
1089 | long size = config->size; | |
1090 | ||
1091 | if (args == NULL) | |
1092 | error (_("Argument required (integer, `fixed' or `limited').")); | |
1093 | else if (strcmp (args, "hard") == 0 | |
1094 | || strcmp (args, "fixed") == 0) | |
1095 | fixed_p = 1; | |
1096 | else if (strcmp (args, "soft") == 0 | |
1097 | || strcmp (args, "limit") == 0) | |
1098 | fixed_p = 0; | |
1099 | else | |
1100 | { | |
1101 | char *end; | |
1102 | ||
1103 | size = strtoul (args, &end, 0); | |
1104 | if (args == end) | |
1105 | error (_("Invalid %s (bad syntax)."), config->name); | |
1106 | ||
1107 | /* Instead of explicitly capping the size of a packet to or | |
1108 | disallowing it, the user is allowed to set the size to | |
1109 | something arbitrarily large. */ | |
1110 | } | |
1111 | ||
1112 | /* So that the query shows the correct value. */ | |
1113 | if (size <= 0) | |
1114 | size = DEFAULT_MAX_MEMORY_PACKET_SIZE; | |
1115 | ||
1116 | /* Extra checks? */ | |
1117 | if (fixed_p && !config->fixed_p) | |
1118 | { | |
1119 | if (! query (_("The target may not be able to correctly handle a %s\n" | |
1120 | "of %ld bytes. Change the packet size? "), | |
1121 | config->name, size)) | |
1122 | error (_("Packet size not changed.")); | |
1123 | } | |
1124 | /* Update the config. */ | |
1125 | config->fixed_p = fixed_p; | |
1126 | config->size = size; | |
1127 | } | |
1128 | ||
1129 | static void | |
1130 | show_memory_packet_size (struct memory_packet_config *config) | |
1131 | { | |
1132 | printf_filtered (_("The %s is %ld. "), config->name, config->size); | |
1133 | if (config->fixed_p) | |
1134 | printf_filtered (_("Packets are fixed at %ld bytes.\n"), | |
1135 | get_memory_packet_size (config)); | |
1136 | else | |
1137 | printf_filtered (_("Packets are limited to %ld bytes.\n"), | |
1138 | get_memory_packet_size (config)); | |
1139 | } | |
1140 | ||
1141 | static struct memory_packet_config memory_write_packet_config = | |
1142 | { | |
1143 | "memory-write-packet-size", | |
1144 | }; | |
1145 | ||
1146 | static void | |
1147 | set_memory_write_packet_size (const char *args, int from_tty) | |
1148 | { | |
1149 | set_memory_packet_size (args, &memory_write_packet_config); | |
1150 | } | |
1151 | ||
1152 | static void | |
1153 | show_memory_write_packet_size (const char *args, int from_tty) | |
1154 | { | |
1155 | show_memory_packet_size (&memory_write_packet_config); | |
1156 | } | |
1157 | ||
1158 | static long | |
1159 | get_memory_write_packet_size (void) | |
1160 | { | |
1161 | return get_memory_packet_size (&memory_write_packet_config); | |
1162 | } | |
1163 | ||
1164 | static struct memory_packet_config memory_read_packet_config = | |
1165 | { | |
1166 | "memory-read-packet-size", | |
1167 | }; | |
1168 | ||
1169 | static void | |
1170 | set_memory_read_packet_size (const char *args, int from_tty) | |
1171 | { | |
1172 | set_memory_packet_size (args, &memory_read_packet_config); | |
1173 | } | |
1174 | ||
1175 | static void | |
1176 | show_memory_read_packet_size (const char *args, int from_tty) | |
1177 | { | |
1178 | show_memory_packet_size (&memory_read_packet_config); | |
1179 | } | |
1180 | ||
1181 | static long | |
1182 | get_memory_read_packet_size (void) | |
1183 | { | |
1184 | long size = get_memory_packet_size (&memory_read_packet_config); | |
1185 | ||
1186 | /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an | |
1187 | extra buffer size argument before the memory read size can be | |
1188 | increased beyond this. */ | |
1189 | if (size > get_remote_packet_size ()) | |
1190 | size = get_remote_packet_size (); | |
1191 | return size; | |
1192 | } | |
1193 | ||
1194 | \f | |
1195 | /* Generic configuration support for packets the stub optionally | |
1196 | supports. Allows the user to specify the use of the packet as well | |
1197 | as allowing GDB to auto-detect support in the remote stub. */ | |
1198 | ||
1199 | enum packet_support | |
1200 | { | |
1201 | PACKET_SUPPORT_UNKNOWN = 0, | |
1202 | PACKET_ENABLE, | |
1203 | PACKET_DISABLE | |
1204 | }; | |
1205 | ||
1206 | struct packet_config | |
1207 | { | |
1208 | const char *name; | |
1209 | const char *title; | |
1210 | ||
1211 | /* If auto, GDB auto-detects support for this packet or feature, | |
1212 | either through qSupported, or by trying the packet and looking | |
1213 | at the response. If true, GDB assumes the target supports this | |
1214 | packet. If false, the packet is disabled. Configs that don't | |
1215 | have an associated command always have this set to auto. */ | |
1216 | enum auto_boolean detect; | |
1217 | ||
1218 | /* Does the target support this packet? */ | |
1219 | enum packet_support support; | |
1220 | }; | |
1221 | ||
1222 | /* Analyze a packet's return value and update the packet config | |
1223 | accordingly. */ | |
1224 | ||
1225 | enum packet_result | |
1226 | { | |
1227 | PACKET_ERROR, | |
1228 | PACKET_OK, | |
1229 | PACKET_UNKNOWN | |
1230 | }; | |
1231 | ||
1232 | static enum packet_support packet_config_support (struct packet_config *config); | |
1233 | static enum packet_support packet_support (int packet); | |
1234 | ||
1235 | static void | |
1236 | show_packet_config_cmd (struct packet_config *config) | |
1237 | { | |
1238 | const char *support = "internal-error"; | |
1239 | ||
1240 | switch (packet_config_support (config)) | |
1241 | { | |
1242 | case PACKET_ENABLE: | |
1243 | support = "enabled"; | |
1244 | break; | |
1245 | case PACKET_DISABLE: | |
1246 | support = "disabled"; | |
1247 | break; | |
1248 | case PACKET_SUPPORT_UNKNOWN: | |
1249 | support = "unknown"; | |
1250 | break; | |
1251 | } | |
1252 | switch (config->detect) | |
1253 | { | |
1254 | case AUTO_BOOLEAN_AUTO: | |
1255 | printf_filtered (_("Support for the `%s' packet " | |
1256 | "is auto-detected, currently %s.\n"), | |
1257 | config->name, support); | |
1258 | break; | |
1259 | case AUTO_BOOLEAN_TRUE: | |
1260 | case AUTO_BOOLEAN_FALSE: | |
1261 | printf_filtered (_("Support for the `%s' packet is currently %s.\n"), | |
1262 | config->name, support); | |
1263 | break; | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | static void | |
1268 | add_packet_config_cmd (struct packet_config *config, const char *name, | |
1269 | const char *title, int legacy) | |
1270 | { | |
1271 | char *set_doc; | |
1272 | char *show_doc; | |
1273 | char *cmd_name; | |
1274 | ||
1275 | config->name = name; | |
1276 | config->title = title; | |
1277 | set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet", | |
1278 | name, title); | |
1279 | show_doc = xstrprintf ("Show current use of remote " | |
1280 | "protocol `%s' (%s) packet", | |
1281 | name, title); | |
1282 | /* set/show TITLE-packet {auto,on,off} */ | |
1283 | cmd_name = xstrprintf ("%s-packet", title); | |
1284 | add_setshow_auto_boolean_cmd (cmd_name, class_obscure, | |
1285 | &config->detect, set_doc, | |
1286 | show_doc, NULL, /* help_doc */ | |
1287 | NULL, | |
1288 | show_remote_protocol_packet_cmd, | |
1289 | &remote_set_cmdlist, &remote_show_cmdlist); | |
1290 | /* The command code copies the documentation strings. */ | |
1291 | xfree (set_doc); | |
1292 | xfree (show_doc); | |
1293 | /* set/show remote NAME-packet {auto,on,off} -- legacy. */ | |
1294 | if (legacy) | |
1295 | { | |
1296 | char *legacy_name; | |
1297 | ||
1298 | legacy_name = xstrprintf ("%s-packet", name); | |
1299 | add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, | |
1300 | &remote_set_cmdlist); | |
1301 | add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, | |
1302 | &remote_show_cmdlist); | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | static enum packet_result | |
1307 | packet_check_result (const char *buf) | |
1308 | { | |
1309 | if (buf[0] != '\0') | |
1310 | { | |
1311 | /* The stub recognized the packet request. Check that the | |
1312 | operation succeeded. */ | |
1313 | if (buf[0] == 'E' | |
1314 | && isxdigit (buf[1]) && isxdigit (buf[2]) | |
1315 | && buf[3] == '\0') | |
1316 | /* "Enn" - definitly an error. */ | |
1317 | return PACKET_ERROR; | |
1318 | ||
1319 | /* Always treat "E." as an error. This will be used for | |
1320 | more verbose error messages, such as E.memtypes. */ | |
1321 | if (buf[0] == 'E' && buf[1] == '.') | |
1322 | return PACKET_ERROR; | |
1323 | ||
1324 | /* The packet may or may not be OK. Just assume it is. */ | |
1325 | return PACKET_OK; | |
1326 | } | |
1327 | else | |
1328 | /* The stub does not support the packet. */ | |
1329 | return PACKET_UNKNOWN; | |
1330 | } | |
1331 | ||
1332 | static enum packet_result | |
1333 | packet_ok (const char *buf, struct packet_config *config) | |
1334 | { | |
1335 | enum packet_result result; | |
1336 | ||
1337 | if (config->detect != AUTO_BOOLEAN_TRUE | |
1338 | && config->support == PACKET_DISABLE) | |
1339 | internal_error (__FILE__, __LINE__, | |
1340 | _("packet_ok: attempt to use a disabled packet")); | |
1341 | ||
1342 | result = packet_check_result (buf); | |
1343 | switch (result) | |
1344 | { | |
1345 | case PACKET_OK: | |
1346 | case PACKET_ERROR: | |
1347 | /* The stub recognized the packet request. */ | |
1348 | if (config->support == PACKET_SUPPORT_UNKNOWN) | |
1349 | { | |
1350 | if (remote_debug) | |
1351 | fprintf_unfiltered (gdb_stdlog, | |
1352 | "Packet %s (%s) is supported\n", | |
1353 | config->name, config->title); | |
1354 | config->support = PACKET_ENABLE; | |
1355 | } | |
1356 | break; | |
1357 | case PACKET_UNKNOWN: | |
1358 | /* The stub does not support the packet. */ | |
1359 | if (config->detect == AUTO_BOOLEAN_AUTO | |
1360 | && config->support == PACKET_ENABLE) | |
1361 | { | |
1362 | /* If the stub previously indicated that the packet was | |
1363 | supported then there is a protocol error. */ | |
1364 | error (_("Protocol error: %s (%s) conflicting enabled responses."), | |
1365 | config->name, config->title); | |
1366 | } | |
1367 | else if (config->detect == AUTO_BOOLEAN_TRUE) | |
1368 | { | |
1369 | /* The user set it wrong. */ | |
1370 | error (_("Enabled packet %s (%s) not recognized by stub"), | |
1371 | config->name, config->title); | |
1372 | } | |
1373 | ||
1374 | if (remote_debug) | |
1375 | fprintf_unfiltered (gdb_stdlog, | |
1376 | "Packet %s (%s) is NOT supported\n", | |
1377 | config->name, config->title); | |
1378 | config->support = PACKET_DISABLE; | |
1379 | break; | |
1380 | } | |
1381 | ||
1382 | return result; | |
1383 | } | |
1384 | ||
1385 | enum { | |
1386 | PACKET_vCont = 0, | |
1387 | PACKET_X, | |
1388 | PACKET_qSymbol, | |
1389 | PACKET_P, | |
1390 | PACKET_p, | |
1391 | PACKET_Z0, | |
1392 | PACKET_Z1, | |
1393 | PACKET_Z2, | |
1394 | PACKET_Z3, | |
1395 | PACKET_Z4, | |
1396 | PACKET_vFile_setfs, | |
1397 | PACKET_vFile_open, | |
1398 | PACKET_vFile_pread, | |
1399 | PACKET_vFile_pwrite, | |
1400 | PACKET_vFile_close, | |
1401 | PACKET_vFile_unlink, | |
1402 | PACKET_vFile_readlink, | |
1403 | PACKET_vFile_fstat, | |
1404 | PACKET_qXfer_auxv, | |
1405 | PACKET_qXfer_features, | |
1406 | PACKET_qXfer_exec_file, | |
1407 | PACKET_qXfer_libraries, | |
1408 | PACKET_qXfer_libraries_svr4, | |
1409 | PACKET_qXfer_memory_map, | |
1410 | PACKET_qXfer_spu_read, | |
1411 | PACKET_qXfer_spu_write, | |
1412 | PACKET_qXfer_osdata, | |
1413 | PACKET_qXfer_threads, | |
1414 | PACKET_qXfer_statictrace_read, | |
1415 | PACKET_qXfer_traceframe_info, | |
1416 | PACKET_qXfer_uib, | |
1417 | PACKET_qGetTIBAddr, | |
1418 | PACKET_qGetTLSAddr, | |
1419 | PACKET_qSupported, | |
1420 | PACKET_qTStatus, | |
1421 | PACKET_QPassSignals, | |
1422 | PACKET_QCatchSyscalls, | |
1423 | PACKET_QProgramSignals, | |
1424 | PACKET_QSetWorkingDir, | |
1425 | PACKET_QStartupWithShell, | |
1426 | PACKET_QEnvironmentHexEncoded, | |
1427 | PACKET_QEnvironmentReset, | |
1428 | PACKET_QEnvironmentUnset, | |
1429 | PACKET_qCRC, | |
1430 | PACKET_qSearch_memory, | |
1431 | PACKET_vAttach, | |
1432 | PACKET_vRun, | |
1433 | PACKET_QStartNoAckMode, | |
1434 | PACKET_vKill, | |
1435 | PACKET_qXfer_siginfo_read, | |
1436 | PACKET_qXfer_siginfo_write, | |
1437 | PACKET_qAttached, | |
1438 | ||
1439 | /* Support for conditional tracepoints. */ | |
1440 | PACKET_ConditionalTracepoints, | |
1441 | ||
1442 | /* Support for target-side breakpoint conditions. */ | |
1443 | PACKET_ConditionalBreakpoints, | |
1444 | ||
1445 | /* Support for target-side breakpoint commands. */ | |
1446 | PACKET_BreakpointCommands, | |
1447 | ||
1448 | /* Support for fast tracepoints. */ | |
1449 | PACKET_FastTracepoints, | |
1450 | ||
1451 | /* Support for static tracepoints. */ | |
1452 | PACKET_StaticTracepoints, | |
1453 | ||
1454 | /* Support for installing tracepoints while a trace experiment is | |
1455 | running. */ | |
1456 | PACKET_InstallInTrace, | |
1457 | ||
1458 | PACKET_bc, | |
1459 | PACKET_bs, | |
1460 | PACKET_TracepointSource, | |
1461 | PACKET_QAllow, | |
1462 | PACKET_qXfer_fdpic, | |
1463 | PACKET_QDisableRandomization, | |
1464 | PACKET_QAgent, | |
1465 | PACKET_QTBuffer_size, | |
1466 | PACKET_Qbtrace_off, | |
1467 | PACKET_Qbtrace_bts, | |
1468 | PACKET_Qbtrace_pt, | |
1469 | PACKET_qXfer_btrace, | |
1470 | ||
1471 | /* Support for the QNonStop packet. */ | |
1472 | PACKET_QNonStop, | |
1473 | ||
1474 | /* Support for the QThreadEvents packet. */ | |
1475 | PACKET_QThreadEvents, | |
1476 | ||
1477 | /* Support for multi-process extensions. */ | |
1478 | PACKET_multiprocess_feature, | |
1479 | ||
1480 | /* Support for enabling and disabling tracepoints while a trace | |
1481 | experiment is running. */ | |
1482 | PACKET_EnableDisableTracepoints_feature, | |
1483 | ||
1484 | /* Support for collecting strings using the tracenz bytecode. */ | |
1485 | PACKET_tracenz_feature, | |
1486 | ||
1487 | /* Support for continuing to run a trace experiment while GDB is | |
1488 | disconnected. */ | |
1489 | PACKET_DisconnectedTracing_feature, | |
1490 | ||
1491 | /* Support for qXfer:libraries-svr4:read with a non-empty annex. */ | |
1492 | PACKET_augmented_libraries_svr4_read_feature, | |
1493 | ||
1494 | /* Support for the qXfer:btrace-conf:read packet. */ | |
1495 | PACKET_qXfer_btrace_conf, | |
1496 | ||
1497 | /* Support for the Qbtrace-conf:bts:size packet. */ | |
1498 | PACKET_Qbtrace_conf_bts_size, | |
1499 | ||
1500 | /* Support for swbreak+ feature. */ | |
1501 | PACKET_swbreak_feature, | |
1502 | ||
1503 | /* Support for hwbreak+ feature. */ | |
1504 | PACKET_hwbreak_feature, | |
1505 | ||
1506 | /* Support for fork events. */ | |
1507 | PACKET_fork_event_feature, | |
1508 | ||
1509 | /* Support for vfork events. */ | |
1510 | PACKET_vfork_event_feature, | |
1511 | ||
1512 | /* Support for the Qbtrace-conf:pt:size packet. */ | |
1513 | PACKET_Qbtrace_conf_pt_size, | |
1514 | ||
1515 | /* Support for exec events. */ | |
1516 | PACKET_exec_event_feature, | |
1517 | ||
1518 | /* Support for query supported vCont actions. */ | |
1519 | PACKET_vContSupported, | |
1520 | ||
1521 | /* Support remote CTRL-C. */ | |
1522 | PACKET_vCtrlC, | |
1523 | ||
1524 | /* Support TARGET_WAITKIND_NO_RESUMED. */ | |
1525 | PACKET_no_resumed, | |
1526 | ||
1527 | PACKET_MAX | |
1528 | }; | |
1529 | ||
1530 | static struct packet_config remote_protocol_packets[PACKET_MAX]; | |
1531 | ||
1532 | /* Returns the packet's corresponding "set remote foo-packet" command | |
1533 | state. See struct packet_config for more details. */ | |
1534 | ||
1535 | static enum auto_boolean | |
1536 | packet_set_cmd_state (int packet) | |
1537 | { | |
1538 | return remote_protocol_packets[packet].detect; | |
1539 | } | |
1540 | ||
1541 | /* Returns whether a given packet or feature is supported. This takes | |
1542 | into account the state of the corresponding "set remote foo-packet" | |
1543 | command, which may be used to bypass auto-detection. */ | |
1544 | ||
1545 | static enum packet_support | |
1546 | packet_config_support (struct packet_config *config) | |
1547 | { | |
1548 | switch (config->detect) | |
1549 | { | |
1550 | case AUTO_BOOLEAN_TRUE: | |
1551 | return PACKET_ENABLE; | |
1552 | case AUTO_BOOLEAN_FALSE: | |
1553 | return PACKET_DISABLE; | |
1554 | case AUTO_BOOLEAN_AUTO: | |
1555 | return config->support; | |
1556 | default: | |
1557 | gdb_assert_not_reached (_("bad switch")); | |
1558 | } | |
1559 | } | |
1560 | ||
1561 | /* Same as packet_config_support, but takes the packet's enum value as | |
1562 | argument. */ | |
1563 | ||
1564 | static enum packet_support | |
1565 | packet_support (int packet) | |
1566 | { | |
1567 | struct packet_config *config = &remote_protocol_packets[packet]; | |
1568 | ||
1569 | return packet_config_support (config); | |
1570 | } | |
1571 | ||
1572 | static void | |
1573 | show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty, | |
1574 | struct cmd_list_element *c, | |
1575 | const char *value) | |
1576 | { | |
1577 | struct packet_config *packet; | |
1578 | ||
1579 | for (packet = remote_protocol_packets; | |
1580 | packet < &remote_protocol_packets[PACKET_MAX]; | |
1581 | packet++) | |
1582 | { | |
1583 | if (&packet->detect == c->var) | |
1584 | { | |
1585 | show_packet_config_cmd (packet); | |
1586 | return; | |
1587 | } | |
1588 | } | |
1589 | internal_error (__FILE__, __LINE__, _("Could not find config for %s"), | |
1590 | c->name); | |
1591 | } | |
1592 | ||
1593 | /* Should we try one of the 'Z' requests? */ | |
1594 | ||
1595 | enum Z_packet_type | |
1596 | { | |
1597 | Z_PACKET_SOFTWARE_BP, | |
1598 | Z_PACKET_HARDWARE_BP, | |
1599 | Z_PACKET_WRITE_WP, | |
1600 | Z_PACKET_READ_WP, | |
1601 | Z_PACKET_ACCESS_WP, | |
1602 | NR_Z_PACKET_TYPES | |
1603 | }; | |
1604 | ||
1605 | /* For compatibility with older distributions. Provide a ``set remote | |
1606 | Z-packet ...'' command that updates all the Z packet types. */ | |
1607 | ||
1608 | static enum auto_boolean remote_Z_packet_detect; | |
1609 | ||
1610 | static void | |
1611 | set_remote_protocol_Z_packet_cmd (char *args, int from_tty, | |
1612 | struct cmd_list_element *c) | |
1613 | { | |
1614 | int i; | |
1615 | ||
1616 | for (i = 0; i < NR_Z_PACKET_TYPES; i++) | |
1617 | remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect; | |
1618 | } | |
1619 | ||
1620 | static void | |
1621 | show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty, | |
1622 | struct cmd_list_element *c, | |
1623 | const char *value) | |
1624 | { | |
1625 | int i; | |
1626 | ||
1627 | for (i = 0; i < NR_Z_PACKET_TYPES; i++) | |
1628 | { | |
1629 | show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]); | |
1630 | } | |
1631 | } | |
1632 | ||
1633 | /* Returns true if the multi-process extensions are in effect. */ | |
1634 | ||
1635 | static int | |
1636 | remote_multi_process_p (struct remote_state *rs) | |
1637 | { | |
1638 | return packet_support (PACKET_multiprocess_feature) == PACKET_ENABLE; | |
1639 | } | |
1640 | ||
1641 | /* Returns true if fork events are supported. */ | |
1642 | ||
1643 | static int | |
1644 | remote_fork_event_p (struct remote_state *rs) | |
1645 | { | |
1646 | return packet_support (PACKET_fork_event_feature) == PACKET_ENABLE; | |
1647 | } | |
1648 | ||
1649 | /* Returns true if vfork events are supported. */ | |
1650 | ||
1651 | static int | |
1652 | remote_vfork_event_p (struct remote_state *rs) | |
1653 | { | |
1654 | return packet_support (PACKET_vfork_event_feature) == PACKET_ENABLE; | |
1655 | } | |
1656 | ||
1657 | /* Returns true if exec events are supported. */ | |
1658 | ||
1659 | static int | |
1660 | remote_exec_event_p (struct remote_state *rs) | |
1661 | { | |
1662 | return packet_support (PACKET_exec_event_feature) == PACKET_ENABLE; | |
1663 | } | |
1664 | ||
1665 | /* Insert fork catchpoint target routine. If fork events are enabled | |
1666 | then return success, nothing more to do. */ | |
1667 | ||
1668 | static int | |
1669 | remote_insert_fork_catchpoint (struct target_ops *ops, int pid) | |
1670 | { | |
1671 | struct remote_state *rs = get_remote_state (); | |
1672 | ||
1673 | return !remote_fork_event_p (rs); | |
1674 | } | |
1675 | ||
1676 | /* Remove fork catchpoint target routine. Nothing to do, just | |
1677 | return success. */ | |
1678 | ||
1679 | static int | |
1680 | remote_remove_fork_catchpoint (struct target_ops *ops, int pid) | |
1681 | { | |
1682 | return 0; | |
1683 | } | |
1684 | ||
1685 | /* Insert vfork catchpoint target routine. If vfork events are enabled | |
1686 | then return success, nothing more to do. */ | |
1687 | ||
1688 | static int | |
1689 | remote_insert_vfork_catchpoint (struct target_ops *ops, int pid) | |
1690 | { | |
1691 | struct remote_state *rs = get_remote_state (); | |
1692 | ||
1693 | return !remote_vfork_event_p (rs); | |
1694 | } | |
1695 | ||
1696 | /* Remove vfork catchpoint target routine. Nothing to do, just | |
1697 | return success. */ | |
1698 | ||
1699 | static int | |
1700 | remote_remove_vfork_catchpoint (struct target_ops *ops, int pid) | |
1701 | { | |
1702 | return 0; | |
1703 | } | |
1704 | ||
1705 | /* Insert exec catchpoint target routine. If exec events are | |
1706 | enabled, just return success. */ | |
1707 | ||
1708 | static int | |
1709 | remote_insert_exec_catchpoint (struct target_ops *ops, int pid) | |
1710 | { | |
1711 | struct remote_state *rs = get_remote_state (); | |
1712 | ||
1713 | return !remote_exec_event_p (rs); | |
1714 | } | |
1715 | ||
1716 | /* Remove exec catchpoint target routine. Nothing to do, just | |
1717 | return success. */ | |
1718 | ||
1719 | static int | |
1720 | remote_remove_exec_catchpoint (struct target_ops *ops, int pid) | |
1721 | { | |
1722 | return 0; | |
1723 | } | |
1724 | ||
1725 | \f | |
1726 | /* Asynchronous signal handle registered as event loop source for | |
1727 | when we have pending events ready to be passed to the core. */ | |
1728 | ||
1729 | static struct async_event_handler *remote_async_inferior_event_token; | |
1730 | ||
1731 | \f | |
1732 | ||
1733 | static ptid_t magic_null_ptid; | |
1734 | static ptid_t not_sent_ptid; | |
1735 | static ptid_t any_thread_ptid; | |
1736 | ||
1737 | /* Find out if the stub attached to PID (and hence GDB should offer to | |
1738 | detach instead of killing it when bailing out). */ | |
1739 | ||
1740 | static int | |
1741 | remote_query_attached (int pid) | |
1742 | { | |
1743 | struct remote_state *rs = get_remote_state (); | |
1744 | size_t size = get_remote_packet_size (); | |
1745 | ||
1746 | if (packet_support (PACKET_qAttached) == PACKET_DISABLE) | |
1747 | return 0; | |
1748 | ||
1749 | if (remote_multi_process_p (rs)) | |
1750 | xsnprintf (rs->buf, size, "qAttached:%x", pid); | |
1751 | else | |
1752 | xsnprintf (rs->buf, size, "qAttached"); | |
1753 | ||
1754 | putpkt (rs->buf); | |
1755 | getpkt (&rs->buf, &rs->buf_size, 0); | |
1756 | ||
1757 | switch (packet_ok (rs->buf, | |
1758 | &remote_protocol_packets[PACKET_qAttached])) | |
1759 | { | |
1760 | case PACKET_OK: | |
1761 | if (strcmp (rs->buf, "1") == 0) | |
1762 | return 1; | |
1763 | break; | |
1764 | case PACKET_ERROR: | |
1765 | warning (_("Remote failure reply: %s"), rs->buf); | |
1766 | break; | |
1767 | case PACKET_UNKNOWN: | |
1768 | break; | |
1769 | } | |
1770 | ||
1771 | return 0; | |
1772 | } | |
1773 | ||
1774 | /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID | |
1775 | has been invented by GDB, instead of reported by the target. Since | |
1776 | we can be connected to a remote system before before knowing about | |
1777 | any inferior, mark the target with execution when we find the first | |
1778 | inferior. If ATTACHED is 1, then we had just attached to this | |
1779 | inferior. If it is 0, then we just created this inferior. If it | |
1780 | is -1, then try querying the remote stub to find out if it had | |
1781 | attached to the inferior or not. If TRY_OPEN_EXEC is true then | |
1782 | attempt to open this inferior's executable as the main executable | |
1783 | if no main executable is open already. */ | |
1784 | ||
1785 | static struct inferior * | |
1786 | remote_add_inferior (int fake_pid_p, int pid, int attached, | |
1787 | int try_open_exec) | |
1788 | { | |
1789 | struct inferior *inf; | |
1790 | ||
1791 | /* Check whether this process we're learning about is to be | |
1792 | considered attached, or if is to be considered to have been | |
1793 | spawned by the stub. */ | |
1794 | if (attached == -1) | |
1795 | attached = remote_query_attached (pid); | |
1796 | ||
1797 | if (gdbarch_has_global_solist (target_gdbarch ())) | |
1798 | { | |
1799 | /* If the target shares code across all inferiors, then every | |
1800 | attach adds a new inferior. */ | |
1801 | inf = add_inferior (pid); | |
1802 | ||
1803 | /* ... and every inferior is bound to the same program space. | |
1804 | However, each inferior may still have its own address | |
1805 | space. */ | |
1806 | inf->aspace = maybe_new_address_space (); | |
1807 | inf->pspace = current_program_space; | |
1808 | } | |
1809 | else | |
1810 | { | |
1811 | /* In the traditional debugging scenario, there's a 1-1 match | |
1812 | between program/address spaces. We simply bind the inferior | |
1813 | to the program space's address space. */ | |
1814 | inf = current_inferior (); | |
1815 | inferior_appeared (inf, pid); | |
1816 | } | |
1817 | ||
1818 | inf->attach_flag = attached; | |
1819 | inf->fake_pid_p = fake_pid_p; | |
1820 | ||
1821 | /* If no main executable is currently open then attempt to | |
1822 | open the file that was executed to create this inferior. */ | |
1823 | if (try_open_exec && get_exec_file (0) == NULL) | |
1824 | exec_file_locate_attach (pid, 0, 1); | |
1825 | ||
1826 | return inf; | |
1827 | } | |
1828 | ||
1829 | static struct private_thread_info * | |
1830 | get_private_info_thread (struct thread_info *info); | |
1831 | ||
1832 | /* Add thread PTID to GDB's thread list. Tag it as executing/running | |
1833 | according to RUNNING. */ | |
1834 | ||
1835 | static void | |
1836 | remote_add_thread (ptid_t ptid, int running, int executing) | |
1837 | { | |
1838 | struct remote_state *rs = get_remote_state (); | |
1839 | struct thread_info *thread; | |
1840 | ||
1841 | /* GDB historically didn't pull threads in the initial connection | |
1842 | setup. If the remote target doesn't even have a concept of | |
1843 | threads (e.g., a bare-metal target), even if internally we | |
1844 | consider that a single-threaded target, mentioning a new thread | |
1845 | might be confusing to the user. Be silent then, preserving the | |
1846 | age old behavior. */ | |
1847 | if (rs->starting_up) | |
1848 | thread = add_thread_silent (ptid); | |
1849 | else | |
1850 | thread = add_thread (ptid); | |
1851 | ||
1852 | get_private_info_thread (thread)->vcont_resumed = executing; | |
1853 | set_executing (ptid, executing); | |
1854 | set_running (ptid, running); | |
1855 | } | |
1856 | ||
1857 | /* Come here when we learn about a thread id from the remote target. | |
1858 | It may be the first time we hear about such thread, so take the | |
1859 | opportunity to add it to GDB's thread list. In case this is the | |
1860 | first time we're noticing its corresponding inferior, add it to | |
1861 | GDB's inferior list as well. EXECUTING indicates whether the | |
1862 | thread is (internally) executing or stopped. */ | |
1863 | ||
1864 | static void | |
1865 | remote_notice_new_inferior (ptid_t currthread, int executing) | |
1866 | { | |
1867 | /* In non-stop mode, we assume new found threads are (externally) | |
1868 | running until proven otherwise with a stop reply. In all-stop, | |
1869 | we can only get here if all threads are stopped. */ | |
1870 | int running = target_is_non_stop_p () ? 1 : 0; | |
1871 | ||
1872 | /* If this is a new thread, add it to GDB's thread list. | |
1873 | If we leave it up to WFI to do this, bad things will happen. */ | |
1874 | ||
1875 | if (in_thread_list (currthread) && is_exited (currthread)) | |
1876 | { | |
1877 | /* We're seeing an event on a thread id we knew had exited. | |
1878 | This has to be a new thread reusing the old id. Add it. */ | |
1879 | remote_add_thread (currthread, running, executing); | |
1880 | return; | |
1881 | } | |
1882 | ||
1883 | if (!in_thread_list (currthread)) | |
1884 | { | |
1885 | struct inferior *inf = NULL; | |
1886 | int pid = ptid_get_pid (currthread); | |
1887 | ||
1888 | if (ptid_is_pid (inferior_ptid) | |
1889 | && pid == ptid_get_pid (inferior_ptid)) | |
1890 | { | |
1891 | /* inferior_ptid has no thread member yet. This can happen | |
1892 | with the vAttach -> remote_wait,"TAAthread:" path if the | |
1893 | stub doesn't support qC. This is the first stop reported | |
1894 | after an attach, so this is the main thread. Update the | |
1895 | ptid in the thread list. */ | |
1896 | if (in_thread_list (pid_to_ptid (pid))) | |
1897 | thread_change_ptid (inferior_ptid, currthread); | |
1898 | else | |
1899 | { | |
1900 | remote_add_thread (currthread, running, executing); | |
1901 | inferior_ptid = currthread; | |
1902 | } | |
1903 | return; | |
1904 | } | |
1905 | ||
1906 | if (ptid_equal (magic_null_ptid, inferior_ptid)) | |
1907 | { | |
1908 | /* inferior_ptid is not set yet. This can happen with the | |
1909 | vRun -> remote_wait,"TAAthread:" path if the stub | |
1910 | doesn't support qC. This is the first stop reported | |
1911 | after an attach, so this is the main thread. Update the | |
1912 | ptid in the thread list. */ | |
1913 | thread_change_ptid (inferior_ptid, currthread); | |
1914 | return; | |
1915 | } | |
1916 | ||
1917 | /* When connecting to a target remote, or to a target | |
1918 | extended-remote which already was debugging an inferior, we | |
1919 | may not know about it yet. Add it before adding its child | |
1920 | thread, so notifications are emitted in a sensible order. */ | |
1921 | if (!in_inferior_list (ptid_get_pid (currthread))) | |
1922 | { | |
1923 | struct remote_state *rs = get_remote_state (); | |
1924 | int fake_pid_p = !remote_multi_process_p (rs); | |
1925 | ||
1926 | inf = remote_add_inferior (fake_pid_p, | |
1927 | ptid_get_pid (currthread), -1, 1); | |
1928 | } | |
1929 | ||
1930 | /* This is really a new thread. Add it. */ | |
1931 | remote_add_thread (currthread, running, executing); | |
1932 | ||
1933 | /* If we found a new inferior, let the common code do whatever | |
1934 | it needs to with it (e.g., read shared libraries, insert | |
1935 | breakpoints), unless we're just setting up an all-stop | |
1936 | connection. */ | |
1937 | if (inf != NULL) | |
1938 | { | |
1939 | struct remote_state *rs = get_remote_state (); | |
1940 | ||
1941 | if (!rs->starting_up) | |
1942 | notice_new_inferior (currthread, executing, 0); | |
1943 | } | |
1944 | } | |
1945 | } | |
1946 | ||
1947 | /* Return THREAD's private thread data, creating it if necessary. */ | |
1948 | ||
1949 | static struct private_thread_info * | |
1950 | get_private_info_thread (struct thread_info *thread) | |
1951 | { | |
1952 | gdb_assert (thread != NULL); | |
1953 | ||
1954 | if (thread->priv == NULL) | |
1955 | { | |
1956 | struct private_thread_info *priv = XNEW (struct private_thread_info); | |
1957 | ||
1958 | thread->private_dtor = free_private_thread_info; | |
1959 | thread->priv = priv; | |
1960 | ||
1961 | priv->core = -1; | |
1962 | priv->extra = NULL; | |
1963 | priv->name = NULL; | |
1964 | priv->name = NULL; | |
1965 | priv->last_resume_step = 0; | |
1966 | priv->last_resume_sig = GDB_SIGNAL_0; | |
1967 | priv->vcont_resumed = 0; | |
1968 | priv->thread_handle = nullptr; | |
1969 | } | |
1970 | ||
1971 | return thread->priv; | |
1972 | } | |
1973 | ||
1974 | /* Return PTID's private thread data, creating it if necessary. */ | |
1975 | ||
1976 | static struct private_thread_info * | |
1977 | get_private_info_ptid (ptid_t ptid) | |
1978 | { | |
1979 | struct thread_info *info = find_thread_ptid (ptid); | |
1980 | ||
1981 | return get_private_info_thread (info); | |
1982 | } | |
1983 | ||
1984 | /* Call this function as a result of | |
1985 | 1) A halt indication (T packet) containing a thread id | |
1986 | 2) A direct query of currthread | |
1987 | 3) Successful execution of set thread */ | |
1988 | ||
1989 | static void | |
1990 | record_currthread (struct remote_state *rs, ptid_t currthread) | |
1991 | { | |
1992 | rs->general_thread = currthread; | |
1993 | } | |
1994 | ||
1995 | /* If 'QPassSignals' is supported, tell the remote stub what signals | |
1996 | it can simply pass through to the inferior without reporting. */ | |
1997 | ||
1998 | static void | |
1999 | remote_pass_signals (struct target_ops *self, | |
2000 | int numsigs, unsigned char *pass_signals) | |
2001 | { | |
2002 | if (packet_support (PACKET_QPassSignals) != PACKET_DISABLE) | |
2003 | { | |
2004 | char *pass_packet, *p; | |
2005 | int count = 0, i; | |
2006 | struct remote_state *rs = get_remote_state (); | |
2007 | ||
2008 | gdb_assert (numsigs < 256); | |
2009 | for (i = 0; i < numsigs; i++) | |
2010 | { | |
2011 | if (pass_signals[i]) | |
2012 | count++; | |
2013 | } | |
2014 | pass_packet = (char *) xmalloc (count * 3 + strlen ("QPassSignals:") + 1); | |
2015 | strcpy (pass_packet, "QPassSignals:"); | |
2016 | p = pass_packet + strlen (pass_packet); | |
2017 | for (i = 0; i < numsigs; i++) | |
2018 | { | |
2019 | if (pass_signals[i]) | |
2020 | { | |
2021 | if (i >= 16) | |
2022 | *p++ = tohex (i >> 4); | |
2023 | *p++ = tohex (i & 15); | |
2024 | if (count) | |
2025 | *p++ = ';'; | |
2026 | else | |
2027 | break; | |
2028 | count--; | |
2029 | } | |
2030 | } | |
2031 | *p = 0; | |
2032 | if (!rs->last_pass_packet || strcmp (rs->last_pass_packet, pass_packet)) | |
2033 | { | |
2034 | putpkt (pass_packet); | |
2035 | getpkt (&rs->buf, &rs->buf_size, 0); | |
2036 | packet_ok (rs->buf, &remote_protocol_packets[PACKET_QPassSignals]); | |
2037 | if (rs->last_pass_packet) | |
2038 | xfree (rs->last_pass_packet); | |
2039 | rs->last_pass_packet = pass_packet; | |
2040 | } | |
2041 | else | |
2042 | xfree (pass_packet); | |
2043 | } | |
2044 | } | |
2045 | ||
2046 | /* If 'QCatchSyscalls' is supported, tell the remote stub | |
2047 | to report syscalls to GDB. */ | |
2048 | ||
2049 | static int | |
2050 | remote_set_syscall_catchpoint (struct target_ops *self, | |
2051 | int pid, int needed, int any_count, | |
2052 | int table_size, int *table) | |
2053 | { | |
2054 | const char *catch_packet; | |
2055 | enum packet_result result; | |
2056 | int n_sysno = 0; | |
2057 | ||
2058 | if (packet_support (PACKET_QCatchSyscalls) == PACKET_DISABLE) | |
2059 | { | |
2060 | /* Not supported. */ | |
2061 | return 1; | |
2062 | } | |
2063 | ||
2064 | if (needed && !any_count) | |
2065 | { | |
2066 | int i; | |
2067 | ||
2068 | /* Count how many syscalls are to be caught (table[sysno] != 0). */ | |
2069 | for (i = 0; i < table_size; i++) | |
2070 | { | |
2071 | if (table[i] != 0) | |
2072 | n_sysno++; | |
2073 | } | |
2074 | } | |
2075 | ||
2076 | if (remote_debug) | |
2077 | { | |
2078 | fprintf_unfiltered (gdb_stdlog, | |
2079 | "remote_set_syscall_catchpoint " | |
2080 | "pid %d needed %d any_count %d n_sysno %d\n", | |
2081 | pid, needed, any_count, n_sysno); | |
2082 | } | |
2083 | ||
2084 | gdb::unique_xmalloc_ptr<char> built_packet; | |
2085 | if (needed) | |
2086 | { | |
2087 | /* Prepare a packet with the sysno list, assuming max 8+1 | |
2088 | characters for a sysno. If the resulting packet size is too | |
2089 | big, fallback on the non-selective packet. */ | |
2090 | const int maxpktsz = strlen ("QCatchSyscalls:1") + n_sysno * 9 + 1; | |
2091 | ||
2092 | built_packet.reset ((char *) xmalloc (maxpktsz)); | |
2093 | strcpy (built_packet.get (), "QCatchSyscalls:1"); | |
2094 | if (!any_count) | |
2095 | { | |
2096 | int i; | |
2097 | char *p; | |
2098 | ||
2099 | p = built_packet.get (); | |
2100 | p += strlen (p); | |
2101 | ||
2102 | /* Add in catch_packet each syscall to be caught (table[i] != 0). */ | |
2103 | for (i = 0; i < table_size; i++) | |
2104 | { | |
2105 | if (table[i] != 0) | |
2106 | p += xsnprintf (p, built_packet.get () + maxpktsz - p, | |
2107 | ";%x", i); | |
2108 | } | |
2109 | } | |
2110 | if (strlen (built_packet.get ()) > get_remote_packet_size ()) | |
2111 | { | |
2112 | /* catch_packet too big. Fallback to less efficient | |
2113 | non selective mode, with GDB doing the filtering. */ | |
2114 | catch_packet = "QCatchSyscalls:1"; | |
2115 | } | |
2116 | else | |
2117 | catch_packet = built_packet.get (); | |
2118 | } | |
2119 | else | |
2120 | catch_packet = "QCatchSyscalls:0"; | |
2121 | ||
2122 | struct remote_state *rs = get_remote_state (); | |
2123 | ||
2124 | putpkt (catch_packet); | |
2125 | getpkt (&rs->buf, &rs->buf_size, 0); | |
2126 | result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_QCatchSyscalls]); | |
2127 | if (result == PACKET_OK) | |
2128 | return 0; | |
2129 | else | |
2130 | return -1; | |
2131 | } | |
2132 | ||
2133 | /* If 'QProgramSignals' is supported, tell the remote stub what | |
2134 | signals it should pass through to the inferior when detaching. */ | |
2135 | ||
2136 | static void | |
2137 | remote_program_signals (struct target_ops *self, | |
2138 | int numsigs, unsigned char *signals) | |
2139 | { | |
2140 | if (packet_support (PACKET_QProgramSignals) != PACKET_DISABLE) | |
2141 | { | |
2142 | char *packet, *p; | |
2143 | int count = 0, i; | |
2144 | struct remote_state *rs = get_remote_state (); | |
2145 | ||
2146 | gdb_assert (numsigs < 256); | |
2147 | for (i = 0; i < numsigs; i++) | |
2148 | { | |
2149 | if (signals[i]) | |
2150 | count++; | |
2151 | } | |
2152 | packet = (char *) xmalloc (count * 3 + strlen ("QProgramSignals:") + 1); | |
2153 | strcpy (packet, "QProgramSignals:"); | |
2154 | p = packet + strlen (packet); | |
2155 | for (i = 0; i < numsigs; i++) | |
2156 | { | |
2157 | if (signal_pass_state (i)) | |
2158 | { | |
2159 | if (i >= 16) | |
2160 | *p++ = tohex (i >> 4); | |
2161 | *p++ = tohex (i & 15); | |
2162 | if (count) | |
2163 | *p++ = ';'; | |
2164 | else | |
2165 | break; | |
2166 | count--; | |
2167 | } | |
2168 | } | |
2169 | *p = 0; | |
2170 | if (!rs->last_program_signals_packet | |
2171 | || strcmp (rs->last_program_signals_packet, packet) != 0) | |
2172 | { | |
2173 | putpkt (packet); | |
2174 | getpkt (&rs->buf, &rs->buf_size, 0); | |
2175 | packet_ok (rs->buf, &remote_protocol_packets[PACKET_QProgramSignals]); | |
2176 | xfree (rs->last_program_signals_packet); | |
2177 | rs->last_program_signals_packet = packet; | |
2178 | } | |
2179 | else | |
2180 | xfree (packet); | |
2181 | } | |
2182 | } | |
2183 | ||
2184 | /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is | |
2185 | MINUS_ONE_PTID, set the thread to -1, so the stub returns the | |
2186 | thread. If GEN is set, set the general thread, if not, then set | |
2187 | the step/continue thread. */ | |
2188 | static void | |
2189 | set_thread (ptid_t ptid, int gen) | |
2190 | { | |
2191 | struct remote_state *rs = get_remote_state (); | |
2192 | ptid_t state = gen ? rs->general_thread : rs->continue_thread; | |
2193 | char *buf = rs->buf; | |
2194 | char *endbuf = rs->buf + get_remote_packet_size (); | |
2195 | ||
2196 | if (ptid_equal (state, ptid)) | |
2197 | return; | |
2198 | ||
2199 | *buf++ = 'H'; | |
2200 | *buf++ = gen ? 'g' : 'c'; | |
2201 | if (ptid_equal (ptid, magic_null_ptid)) | |
2202 | xsnprintf (buf, endbuf - buf, "0"); | |
2203 | else if (ptid_equal (ptid, any_thread_ptid)) | |
2204 | xsnprintf (buf, endbuf - buf, "0"); | |
2205 | else if (ptid_equal (ptid, minus_one_ptid)) | |
2206 | xsnprintf (buf, endbuf - buf, "-1"); | |
2207 | else | |
2208 | write_ptid (buf, endbuf, ptid); | |
2209 | putpkt (rs->buf); | |
2210 | getpkt (&rs->buf, &rs->buf_size, 0); | |
2211 | if (gen) | |
2212 | rs->general_thread = ptid; | |
2213 | else | |
2214 | rs->continue_thread = ptid; | |
2215 | } | |
2216 | ||
2217 | static void | |
2218 | set_general_thread (ptid_t ptid) | |
2219 | { | |
2220 | set_thread (ptid, 1); | |
2221 | } | |
2222 | ||
2223 | static void | |
2224 | set_continue_thread (ptid_t ptid) | |
2225 | { | |
2226 | set_thread (ptid, 0); | |
2227 | } | |
2228 | ||
2229 | /* Change the remote current process. Which thread within the process | |
2230 | ends up selected isn't important, as long as it is the same process | |
2231 | as what INFERIOR_PTID points to. | |
2232 | ||
2233 | This comes from that fact that there is no explicit notion of | |
2234 | "selected process" in the protocol. The selected process for | |
2235 | general operations is the process the selected general thread | |
2236 | belongs to. */ | |
2237 | ||
2238 | static void | |
2239 | set_general_process (void) | |
2240 | { | |
2241 | struct remote_state *rs = get_remote_state (); | |
2242 | ||
2243 | /* If the remote can't handle multiple processes, don't bother. */ | |
2244 | if (!remote_multi_process_p (rs)) | |
2245 | return; | |
2246 | ||
2247 | /* We only need to change the remote current thread if it's pointing | |
2248 | at some other process. */ | |
2249 | if (ptid_get_pid (rs->general_thread) != ptid_get_pid (inferior_ptid)) | |
2250 | set_general_thread (inferior_ptid); | |
2251 | } | |
2252 | ||
2253 | \f | |
2254 | /* Return nonzero if this is the main thread that we made up ourselves | |
2255 | to model non-threaded targets as single-threaded. */ | |
2256 | ||
2257 | static int | |
2258 | remote_thread_always_alive (struct target_ops *ops, ptid_t ptid) | |
2259 | { | |
2260 | if (ptid_equal (ptid, magic_null_ptid)) | |
2261 | /* The main thread is always alive. */ | |
2262 | return 1; | |
2263 | ||
2264 | if (ptid_get_pid (ptid) != 0 && ptid_get_lwp (ptid) == 0) | |
2265 | /* The main thread is always alive. This can happen after a | |
2266 | vAttach, if the remote side doesn't support | |
2267 | multi-threading. */ | |
2268 | return 1; | |
2269 | ||
2270 | return 0; | |
2271 | } | |
2272 | ||
2273 | /* Return nonzero if the thread PTID is still alive on the remote | |
2274 | system. */ | |
2275 | ||
2276 | static int | |
2277 | remote_thread_alive (struct target_ops *ops, ptid_t ptid) | |
2278 | { | |
2279 | struct remote_state *rs = get_remote_state (); | |
2280 | char *p, *endp; | |
2281 | ||
2282 | /* Check if this is a thread that we made up ourselves to model | |
2283 | non-threaded targets as single-threaded. */ | |
2284 | if (remote_thread_always_alive (ops, ptid)) | |
2285 | return 1; | |
2286 | ||
2287 | p = rs->buf; | |
2288 | endp = rs->buf + get_remote_packet_size (); | |
2289 | ||
2290 | *p++ = 'T'; | |
2291 | write_ptid (p, endp, ptid); | |
2292 | ||
2293 | putpkt (rs->buf); | |
2294 | getpkt (&rs->buf, &rs->buf_size, 0); | |
2295 | return (rs->buf[0] == 'O' && rs->buf[1] == 'K'); | |
2296 | } | |
2297 | ||
2298 | /* Return a pointer to a thread name if we know it and NULL otherwise. | |
2299 | The thread_info object owns the memory for the name. */ | |
2300 | ||
2301 | static const char * | |
2302 | remote_thread_name (struct target_ops *ops, struct thread_info *info) | |
2303 | { | |
2304 | if (info->priv != NULL) | |
2305 | return info->priv->name; | |
2306 | ||
2307 | return NULL; | |
2308 | } | |
2309 | ||
2310 | /* About these extended threadlist and threadinfo packets. They are | |
2311 | variable length packets but, the fields within them are often fixed | |
2312 | length. They are redundent enough to send over UDP as is the | |
2313 | remote protocol in general. There is a matching unit test module | |
2314 | in libstub. */ | |
2315 | ||
2316 | /* WARNING: This threadref data structure comes from the remote O.S., | |
2317 | libstub protocol encoding, and remote.c. It is not particularly | |
2318 | changable. */ | |
2319 | ||
2320 | /* Right now, the internal structure is int. We want it to be bigger. | |
2321 | Plan to fix this. */ | |
2322 | ||
2323 | typedef int gdb_threadref; /* Internal GDB thread reference. */ | |
2324 | ||
2325 | /* gdb_ext_thread_info is an internal GDB data structure which is | |
2326 | equivalent to the reply of the remote threadinfo packet. */ | |
2327 | ||
2328 | struct gdb_ext_thread_info | |
2329 | { | |
2330 | threadref threadid; /* External form of thread reference. */ | |
2331 | int active; /* Has state interesting to GDB? | |
2332 | regs, stack. */ | |
2333 | char display[256]; /* Brief state display, name, | |
2334 | blocked/suspended. */ | |
2335 | char shortname[32]; /* To be used to name threads. */ | |
2336 | char more_display[256]; /* Long info, statistics, queue depth, | |
2337 | whatever. */ | |
2338 | }; | |
2339 | ||
2340 | /* The volume of remote transfers can be limited by submitting | |
2341 | a mask containing bits specifying the desired information. | |
2342 | Use a union of these values as the 'selection' parameter to | |
2343 | get_thread_info. FIXME: Make these TAG names more thread specific. */ | |
2344 | ||
2345 | #define TAG_THREADID 1 | |
2346 | #define TAG_EXISTS 2 | |
2347 | #define TAG_DISPLAY 4 | |
2348 | #define TAG_THREADNAME 8 | |
2349 | #define TAG_MOREDISPLAY 16 | |
2350 | ||
2351 | #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2) | |
2352 | ||
2353 | static char *unpack_nibble (char *buf, int *val); | |
2354 | ||
2355 | static char *unpack_byte (char *buf, int *value); | |
2356 | ||
2357 | static char *pack_int (char *buf, int value); | |
2358 | ||
2359 | static char *unpack_int (char *buf, int *value); | |
2360 | ||
2361 | static char *unpack_string (char *src, char *dest, int length); | |
2362 | ||
2363 | static char *pack_threadid (char *pkt, threadref *id); | |
2364 | ||
2365 | static char *unpack_threadid (char *inbuf, threadref *id); | |
2366 | ||
2367 | void int_to_threadref (threadref *id, int value); | |
2368 | ||
2369 | static int threadref_to_int (threadref *ref); | |
2370 | ||
2371 | static void copy_threadref (threadref *dest, threadref *src); | |
2372 | ||
2373 | static int threadmatch (threadref *dest, threadref *src); | |
2374 | ||
2375 | static char *pack_threadinfo_request (char *pkt, int mode, | |
2376 | threadref *id); | |
2377 | ||
2378 | static int remote_unpack_thread_info_response (char *pkt, | |
2379 | threadref *expectedref, | |
2380 | struct gdb_ext_thread_info | |
2381 | *info); | |
2382 | ||
2383 | ||
2384 | static int remote_get_threadinfo (threadref *threadid, | |
2385 | int fieldset, /*TAG mask */ | |
2386 | struct gdb_ext_thread_info *info); | |
2387 | ||
2388 | static char *pack_threadlist_request (char *pkt, int startflag, | |
2389 | int threadcount, | |
2390 | threadref *nextthread); | |
2391 | ||
2392 | static int parse_threadlist_response (char *pkt, | |
2393 | int result_limit, | |
2394 | threadref *original_echo, | |
2395 | threadref *resultlist, | |
2396 | int *doneflag); | |
2397 | ||
2398 | static int remote_get_threadlist (int startflag, | |
2399 | threadref *nextthread, | |
2400 | int result_limit, | |
2401 | int *done, | |
2402 | int *result_count, | |
2403 | threadref *threadlist); | |
2404 | ||
2405 | typedef int (*rmt_thread_action) (threadref *ref, void *context); | |
2406 | ||
2407 | static int remote_threadlist_iterator (rmt_thread_action stepfunction, | |
2408 | void *context, int looplimit); | |
2409 | ||
2410 | static int remote_newthread_step (threadref *ref, void *context); | |
2411 | ||
2412 | ||
2413 | /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the | |
2414 | buffer we're allowed to write to. Returns | |
2415 | BUF+CHARACTERS_WRITTEN. */ | |
2416 | ||
2417 | static char * | |
2418 | write_ptid (char *buf, const char *endbuf, ptid_t ptid) | |
2419 | { | |
2420 | int pid, tid; | |
2421 | struct remote_state *rs = get_remote_state (); | |
2422 | ||
2423 | if (remote_multi_process_p (rs)) | |
2424 | { | |
2425 | pid = ptid_get_pid (ptid); | |
2426 | if (pid < 0) | |
2427 | buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid); | |
2428 | else | |
2429 | buf += xsnprintf (buf, endbuf - buf, "p%x.", pid); | |
2430 | } | |
2431 | tid = ptid_get_lwp (ptid); | |
2432 | if (tid < 0) | |
2433 | buf += xsnprintf (buf, endbuf - buf, "-%x", -tid); | |
2434 | else | |
2435 | buf += xsnprintf (buf, endbuf - buf, "%x", tid); | |
2436 | ||
2437 | return buf; | |
2438 | } | |
2439 | ||
2440 | /* Extract a PTID from BUF. If non-null, OBUF is set to one past the | |
2441 | last parsed char. Returns null_ptid if no thread id is found, and | |
2442 | throws an error if the thread id has an invalid format. */ | |
2443 | ||
2444 | static ptid_t | |
2445 | read_ptid (const char *buf, const char **obuf) | |
2446 | { | |
2447 | const char *p = buf; | |
2448 | const char *pp; | |
2449 | ULONGEST pid = 0, tid = 0; | |
2450 | ||
2451 | if (*p == 'p') | |
2452 | { | |
2453 | /* Multi-process ptid. */ | |
2454 | pp = unpack_varlen_hex (p + 1, &pid); | |
2455 | if (*pp != '.') | |
2456 | error (_("invalid remote ptid: %s"), p); | |
2457 | ||
2458 | p = pp; | |
2459 | pp = unpack_varlen_hex (p + 1, &tid); | |
2460 | if (obuf) | |
2461 | *obuf = pp; | |
2462 | return ptid_build (pid, tid, 0); | |
2463 | } | |
2464 | ||
2465 | /* No multi-process. Just a tid. */ | |
2466 | pp = unpack_varlen_hex (p, &tid); | |
2467 | ||
2468 | /* Return null_ptid when no thread id is found. */ | |
2469 | if (p == pp) | |
2470 | { | |
2471 | if (obuf) | |
2472 | *obuf = pp; | |
2473 | return null_ptid; | |
2474 | } | |
2475 | ||
2476 | /* Since the stub is not sending a process id, then default to | |
2477 | what's in inferior_ptid, unless it's null at this point. If so, | |
2478 | then since there's no way to know the pid of the reported | |
2479 | threads, use the magic number. */ | |
2480 | if (ptid_equal (inferior_ptid, null_ptid)) | |
2481 | pid = ptid_get_pid (magic_null_ptid); | |
2482 | else | |
2483 | pid = ptid_get_pid (inferior_ptid); | |
2484 | ||
2485 | if (obuf) | |
2486 | *obuf = pp; | |
2487 | return ptid_build (pid, tid, 0); | |
2488 | } | |
2489 | ||
2490 | static int | |
2491 | stubhex (int ch) | |
2492 | { | |
2493 | if (ch >= 'a' && ch <= 'f') | |
2494 | return ch - 'a' + 10; | |
2495 | if (ch >= '0' && ch <= '9') | |
2496 | return ch - '0'; | |
2497 | if (ch >= 'A' && ch <= 'F') | |
2498 | return ch - 'A' + 10; | |
2499 | return -1; | |
2500 | } | |
2501 | ||
2502 | static int | |
2503 | stub_unpack_int (char *buff, int fieldlength) | |
2504 | { | |
2505 | int nibble; | |
2506 | int retval = 0; | |
2507 | ||
2508 | while (fieldlength) | |
2509 | { | |
2510 | nibble = stubhex (*buff++); | |
2511 | retval |= nibble; | |
2512 | fieldlength--; | |
2513 | if (fieldlength) | |
2514 | retval = retval << 4; | |
2515 | } | |
2516 | return retval; | |
2517 | } | |
2518 | ||
2519 | static char * | |
2520 | unpack_nibble (char *buf, int *val) | |
2521 | { | |
2522 | *val = fromhex (*buf++); | |
2523 | return buf; | |
2524 | } | |
2525 | ||
2526 | static char * | |
2527 | unpack_byte (char *buf, int *value) | |
2528 | { | |
2529 | *value = stub_unpack_int (buf, 2); | |
2530 | return buf + 2; | |
2531 | } | |
2532 | ||
2533 | static char * | |
2534 | pack_int (char *buf, int value) | |
2535 | { | |
2536 | buf = pack_hex_byte (buf, (value >> 24) & 0xff); | |
2537 | buf = pack_hex_byte (buf, (value >> 16) & 0xff); | |
2538 | buf = pack_hex_byte (buf, (value >> 8) & 0x0ff); | |
2539 | buf = pack_hex_byte (buf, (value & 0xff)); | |
2540 | return buf; | |
2541 | } | |
2542 | ||
2543 | static char * | |
2544 | unpack_int (char *buf, int *value) | |
2545 | { | |
2546 | *value = stub_unpack_int (buf, 8); | |
2547 | return buf + 8; | |
2548 | } | |
2549 | ||
2550 | #if 0 /* Currently unused, uncomment when needed. */ | |
2551 | static char *pack_string (char *pkt, char *string); | |
2552 | ||
2553 | static char * | |
2554 | pack_string (char *pkt, char *string) | |
2555 | { | |
2556 | char ch; | |
2557 | int len; | |
2558 | ||
2559 | len = strlen (string); | |
2560 | if (len > 200) | |
2561 | len = 200; /* Bigger than most GDB packets, junk??? */ | |
2562 | pkt = pack_hex_byte (pkt, len); | |
2563 | while (len-- > 0) | |
2564 | { | |
2565 | ch = *string++; | |
2566 | if ((ch == '\0') || (ch == '#')) | |
2567 | ch = '*'; /* Protect encapsulation. */ | |
2568 | *pkt++ = ch; | |
2569 | } | |
2570 | return pkt; | |
2571 | } | |
2572 | #endif /* 0 (unused) */ | |
2573 | ||
2574 | static char * | |
2575 | unpack_string (char *src, char *dest, int length) | |
2576 | { | |
2577 | while (length--) | |
2578 | *dest++ = *src++; | |
2579 | *dest = '\0'; | |
2580 | return src; | |
2581 | } | |
2582 | ||
2583 | static char * | |
2584 | pack_threadid (char *pkt, threadref *id) | |
2585 | { | |
2586 | char *limit; | |
2587 | unsigned char *altid; | |
2588 | ||
2589 | altid = (unsigned char *) id; | |
2590 | limit = pkt + BUF_THREAD_ID_SIZE; | |
2591 | while (pkt < limit) | |
2592 | pkt = pack_hex_byte (pkt, *altid++); | |
2593 | return pkt; | |
2594 | } | |
2595 | ||
2596 | ||
2597 | static char * | |
2598 | unpack_threadid (char *inbuf, threadref *id) | |
2599 | { | |
2600 | char *altref; | |
2601 | char *limit = inbuf + BUF_THREAD_ID_SIZE; | |
2602 | int x, y; | |
2603 | ||
2604 | altref = (char *) id; | |
2605 | ||
2606 | while (inbuf < limit) | |
2607 | { | |
2608 | x = stubhex (*inbuf++); | |
2609 | y = stubhex (*inbuf++); | |
2610 | *altref++ = (x << 4) | y; | |
2611 | } | |
2612 | return inbuf; | |
2613 | } | |
2614 | ||
2615 | /* Externally, threadrefs are 64 bits but internally, they are still | |
2616 | ints. This is due to a mismatch of specifications. We would like | |
2617 | to use 64bit thread references internally. This is an adapter | |
2618 | function. */ | |
2619 | ||
2620 | void | |
2621 | int_to_threadref (threadref *id, int value) | |
2622 | { | |
2623 | unsigned char *scan; | |
2624 | ||
2625 | scan = (unsigned char *) id; | |
2626 | { | |
2627 | int i = 4; | |
2628 | while (i--) | |
2629 | *scan++ = 0; | |
2630 | } | |
2631 | *scan++ = (value >> 24) & 0xff; | |
2632 | *scan++ = (value >> 16) & 0xff; | |
2633 | *scan++ = (value >> 8) & 0xff; | |
2634 | *scan++ = (value & 0xff); | |
2635 | } | |
2636 | ||
2637 | static int | |
2638 | threadref_to_int (threadref *ref) | |
2639 | { | |
2640 | int i, value = 0; | |
2641 | unsigned char *scan; | |
2642 | ||
2643 | scan = *ref; | |
2644 | scan += 4; | |
2645 | i = 4; | |
2646 | while (i-- > 0) | |
2647 | value = (value << 8) | ((*scan++) & 0xff); | |
2648 | return value; | |
2649 | } | |
2650 | ||
2651 | static void | |
2652 | copy_threadref (threadref *dest, threadref *src) | |
2653 | { | |
2654 | int i; | |
2655 | unsigned char *csrc, *cdest; | |
2656 | ||
2657 | csrc = (unsigned char *) src; | |
2658 | cdest = (unsigned char *) dest; | |
2659 | i = 8; | |
2660 | while (i--) | |
2661 | *cdest++ = *csrc++; | |
2662 | } | |
2663 | ||
2664 | static int | |
2665 | threadmatch (threadref *dest, threadref *src) | |
2666 | { | |
2667 | /* Things are broken right now, so just assume we got a match. */ | |
2668 | #if 0 | |
2669 | unsigned char *srcp, *destp; | |
2670 | int i, result; | |
2671 | srcp = (char *) src; | |
2672 | destp = (char *) dest; | |
2673 | ||
2674 | result = 1; | |
2675 | while (i-- > 0) | |
2676 | result &= (*srcp++ == *destp++) ? 1 : 0; | |
2677 | return result; | |
2678 | #endif | |
2679 | return 1; | |
2680 | } | |
2681 | ||
2682 | /* | |
2683 | threadid:1, # always request threadid | |
2684 | context_exists:2, | |
2685 | display:4, | |
2686 | unique_name:8, | |
2687 | more_display:16 | |
2688 | */ | |
2689 | ||
2690 | /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */ | |
2691 | ||
2692 | static char * | |
2693 | pack_threadinfo_request (char *pkt, int mode, threadref *id) | |
2694 | { | |
2695 | *pkt++ = 'q'; /* Info Query */ | |
2696 | *pkt++ = 'P'; /* process or thread info */ | |
2697 | pkt = pack_int (pkt, mode); /* mode */ | |
2698 | pkt = pack_threadid (pkt, id); /* threadid */ | |
2699 | *pkt = '\0'; /* terminate */ | |
2700 | return pkt; | |
2701 | } | |
2702 | ||
2703 | /* These values tag the fields in a thread info response packet. */ | |
2704 | /* Tagging the fields allows us to request specific fields and to | |
2705 | add more fields as time goes by. */ | |
2706 | ||
2707 | #define TAG_THREADID 1 /* Echo the thread identifier. */ | |
2708 | #define TAG_EXISTS 2 /* Is this process defined enough to | |
2709 | fetch registers and its stack? */ | |
2710 | #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */ | |
2711 | #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */ | |
2712 | #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about | |
2713 | the process. */ | |
2714 | ||
2715 | static int | |
2716 | remote_unpack_thread_info_response (char *pkt, threadref *expectedref, | |
2717 | struct gdb_ext_thread_info *info) | |
2718 | { | |
2719 | struct remote_state *rs = get_remote_state (); | |
2720 | int mask, length; | |
2721 | int tag; | |
2722 | threadref ref; | |
2723 | char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */ | |
2724 | int retval = 1; | |
2725 | ||
2726 | /* info->threadid = 0; FIXME: implement zero_threadref. */ | |
2727 | info->active = 0; | |
2728 | info->display[0] = '\0'; | |
2729 | info->shortname[0] = '\0'; | |
2730 | info->more_display[0] = '\0'; | |
2731 | ||
2732 | /* Assume the characters indicating the packet type have been | |
2733 | stripped. */ | |
2734 | pkt = unpack_int (pkt, &mask); /* arg mask */ | |
2735 | pkt = unpack_threadid (pkt, &ref); | |
2736 | ||
2737 | if (mask == 0) | |
2738 | warning (_("Incomplete response to threadinfo request.")); | |
2739 | if (!threadmatch (&ref, expectedref)) | |
2740 | { /* This is an answer to a different request. */ | |
2741 | warning (_("ERROR RMT Thread info mismatch.")); | |
2742 | return 0; | |
2743 | } | |
2744 | copy_threadref (&info->threadid, &ref); | |
2745 | ||
2746 | /* Loop on tagged fields , try to bail if somthing goes wrong. */ | |
2747 | ||
2748 | /* Packets are terminated with nulls. */ | |
2749 | while ((pkt < limit) && mask && *pkt) | |
2750 | { | |
2751 | pkt = unpack_int (pkt, &tag); /* tag */ | |
2752 | pkt = unpack_byte (pkt, &length); /* length */ | |
2753 | if (!(tag & mask)) /* Tags out of synch with mask. */ | |
2754 | { | |
2755 | warning (_("ERROR RMT: threadinfo tag mismatch.")); | |
2756 | retval = 0; | |
2757 | break; | |
2758 | } | |
2759 | if (tag == TAG_THREADID) | |
2760 | { | |
2761 | if (length != 16) | |
2762 | { | |
2763 | warning (_("ERROR RMT: length of threadid is not 16.")); | |
2764 | retval = 0; | |
2765 | break; | |
2766 | } | |
2767 | pkt = unpack_threadid (pkt, &ref); | |
2768 | mask = mask & ~TAG_THREADID; | |
2769 | continue; | |
2770 | } | |
2771 | if (tag == TAG_EXISTS) | |
2772 | { | |
2773 | info->active = stub_unpack_int (pkt, length); | |
2774 | pkt += length; | |
2775 | mask = mask & ~(TAG_EXISTS); | |
2776 | if (length > 8) | |
2777 | { | |
2778 | warning (_("ERROR RMT: 'exists' length too long.")); | |
2779 | retval = 0; | |
2780 | break; | |
2781 | } | |
2782 | continue; | |
2783 | } | |
2784 | if (tag == TAG_THREADNAME) | |
2785 | { | |
2786 | pkt = unpack_string (pkt, &info->shortname[0], length); | |
2787 | mask = mask & ~TAG_THREADNAME; | |
2788 | continue; | |
2789 | } | |
2790 | if (tag == TAG_DISPLAY) | |
2791 | { | |
2792 | pkt = unpack_string (pkt, &info->display[0], length); | |
2793 | mask = mask & ~TAG_DISPLAY; | |
2794 | continue; | |
2795 | } | |
2796 | if (tag == TAG_MOREDISPLAY) | |
2797 | { | |
2798 | pkt = unpack_string (pkt, &info->more_display[0], length); | |
2799 | mask = mask & ~TAG_MOREDISPLAY; | |
2800 | continue; | |
2801 | } | |
2802 | warning (_("ERROR RMT: unknown thread info tag.")); | |
2803 | break; /* Not a tag we know about. */ | |
2804 | } | |
2805 | return retval; | |
2806 | } | |
2807 | ||
2808 | static int | |
2809 | remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */ | |
2810 | struct gdb_ext_thread_info *info) | |
2811 | { | |
2812 | struct remote_state *rs = get_remote_state (); | |
2813 | int result; | |
2814 | ||
2815 | pack_threadinfo_request (rs->buf, fieldset, threadid); | |
2816 | putpkt (rs->buf); | |
2817 | getpkt (&rs->buf, &rs->buf_size, 0); | |
2818 | ||
2819 | if (rs->buf[0] == '\0') | |
2820 | return 0; | |
2821 | ||
2822 | result = remote_unpack_thread_info_response (rs->buf + 2, | |
2823 | threadid, info); | |
2824 | return result; | |
2825 | } | |
2826 | ||
2827 | /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */ | |
2828 | ||
2829 | static char * | |
2830 | pack_threadlist_request (char *pkt, int startflag, int threadcount, | |
2831 | threadref *nextthread) | |
2832 | { | |
2833 | *pkt++ = 'q'; /* info query packet */ | |
2834 | *pkt++ = 'L'; /* Process LIST or threadLIST request */ | |
2835 | pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */ | |
2836 | pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */ | |
2837 | pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */ | |
2838 | *pkt = '\0'; | |
2839 | return pkt; | |
2840 | } | |
2841 | ||
2842 | /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */ | |
2843 | ||
2844 | static int | |
2845 | parse_threadlist_response (char *pkt, int result_limit, | |
2846 | threadref *original_echo, threadref *resultlist, | |
2847 | int *doneflag) | |
2848 | { | |
2849 | struct remote_state *rs = get_remote_state (); | |
2850 | char *limit; | |
2851 | int count, resultcount, done; | |
2852 | ||
2853 | resultcount = 0; | |
2854 | /* Assume the 'q' and 'M chars have been stripped. */ | |
2855 | limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE); | |
2856 | /* done parse past here */ | |
2857 | pkt = unpack_byte (pkt, &count); /* count field */ | |
2858 | pkt = unpack_nibble (pkt, &done); | |
2859 | /* The first threadid is the argument threadid. */ | |
2860 | pkt = unpack_threadid (pkt, original_echo); /* should match query packet */ | |
2861 | while ((count-- > 0) && (pkt < limit)) | |
2862 | { | |
2863 | pkt = unpack_threadid (pkt, resultlist++); | |
2864 | if (resultcount++ >= result_limit) | |
2865 | break; | |
2866 | } | |
2867 | if (doneflag) | |
2868 | *doneflag = done; | |
2869 | return resultcount; | |
2870 | } | |
2871 | ||
2872 | /* Fetch the next batch of threads from the remote. Returns -1 if the | |
2873 | qL packet is not supported, 0 on error and 1 on success. */ | |
2874 | ||
2875 | static int | |
2876 | remote_get_threadlist (int startflag, threadref *nextthread, int result_limit, | |
2877 | int *done, int *result_count, threadref *threadlist) | |
2878 | { | |
2879 | struct remote_state *rs = get_remote_state (); | |
2880 | int result = 1; | |
2881 | ||
2882 | /* Trancate result limit to be smaller than the packet size. */ | |
2883 | if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) | |
2884 | >= get_remote_packet_size ()) | |
2885 | result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2; | |
2886 | ||
2887 | pack_threadlist_request (rs->buf, startflag, result_limit, nextthread); | |
2888 | putpkt (rs->buf); | |
2889 | getpkt (&rs->buf, &rs->buf_size, 0); | |
2890 | if (*rs->buf == '\0') | |
2891 | { | |
2892 | /* Packet not supported. */ | |
2893 | return -1; | |
2894 | } | |
2895 | ||
2896 | *result_count = | |
2897 | parse_threadlist_response (rs->buf + 2, result_limit, | |
2898 | &rs->echo_nextthread, threadlist, done); | |
2899 | ||
2900 | if (!threadmatch (&rs->echo_nextthread, nextthread)) | |
2901 | { | |
2902 | /* FIXME: This is a good reason to drop the packet. */ | |
2903 | /* Possably, there is a duplicate response. */ | |
2904 | /* Possabilities : | |
2905 | retransmit immediatly - race conditions | |
2906 | retransmit after timeout - yes | |
2907 | exit | |
2908 | wait for packet, then exit | |
2909 | */ | |
2910 | warning (_("HMM: threadlist did not echo arg thread, dropping it.")); | |
2911 | return 0; /* I choose simply exiting. */ | |
2912 | } | |
2913 | if (*result_count <= 0) | |
2914 | { | |
2915 | if (*done != 1) | |
2916 | { | |
2917 | warning (_("RMT ERROR : failed to get remote thread list.")); | |
2918 | result = 0; | |
2919 | } | |
2920 | return result; /* break; */ | |
2921 | } | |
2922 | if (*result_count > result_limit) | |
2923 | { | |
2924 | *result_count = 0; | |
2925 | warning (_("RMT ERROR: threadlist response longer than requested.")); | |
2926 | return 0; | |
2927 | } | |
2928 | return result; | |
2929 | } | |
2930 | ||
2931 | /* Fetch the list of remote threads, with the qL packet, and call | |
2932 | STEPFUNCTION for each thread found. Stops iterating and returns 1 | |
2933 | if STEPFUNCTION returns true. Stops iterating and returns 0 if the | |
2934 | STEPFUNCTION returns false. If the packet is not supported, | |
2935 | returns -1. */ | |
2936 | ||
2937 | static int | |
2938 | remote_threadlist_iterator (rmt_thread_action stepfunction, void *context, | |
2939 | int looplimit) | |
2940 | { | |
2941 | struct remote_state *rs = get_remote_state (); | |
2942 | int done, i, result_count; | |
2943 | int startflag = 1; | |
2944 | int result = 1; | |
2945 | int loopcount = 0; | |
2946 | ||
2947 | done = 0; | |
2948 | while (!done) | |
2949 | { | |
2950 | if (loopcount++ > looplimit) | |
2951 | { | |
2952 | result = 0; | |
2953 | warning (_("Remote fetch threadlist -infinite loop-.")); | |
2954 | break; | |
2955 | } | |
2956 | result = remote_get_threadlist (startflag, &rs->nextthread, | |
2957 | MAXTHREADLISTRESULTS, | |
2958 | &done, &result_count, | |
2959 | rs->resultthreadlist); | |
2960 | if (result <= 0) | |
2961 | break; | |
2962 | /* Clear for later iterations. */ | |
2963 | startflag = 0; | |
2964 | /* Setup to resume next batch of thread references, set nextthread. */ | |
2965 | if (result_count >= 1) | |
2966 | copy_threadref (&rs->nextthread, | |
2967 | &rs->resultthreadlist[result_count - 1]); | |
2968 | i = 0; | |
2969 | while (result_count--) | |
2970 | { | |
2971 | if (!(*stepfunction) (&rs->resultthreadlist[i++], context)) | |
2972 | { | |
2973 | result = 0; | |
2974 | break; | |
2975 | } | |
2976 | } | |
2977 | } | |
2978 | return result; | |
2979 | } | |
2980 | ||
2981 | /* A thread found on the remote target. */ | |
2982 | ||
2983 | typedef struct thread_item | |
2984 | { | |
2985 | /* The thread's PTID. */ | |
2986 | ptid_t ptid; | |
2987 | ||
2988 | /* The thread's extra info. May be NULL. */ | |
2989 | char *extra; | |
2990 | ||
2991 | /* The thread's name. May be NULL. */ | |
2992 | char *name; | |
2993 | ||
2994 | /* The core the thread was running on. -1 if not known. */ | |
2995 | int core; | |
2996 | ||
2997 | /* The thread handle associated with the thread. */ | |
2998 | gdb::byte_vector *thread_handle; | |
2999 | ||
3000 | } thread_item_t; | |
3001 | DEF_VEC_O(thread_item_t); | |
3002 | ||
3003 | /* Context passed around to the various methods listing remote | |
3004 | threads. As new threads are found, they're added to the ITEMS | |
3005 | vector. */ | |
3006 | ||
3007 | struct threads_listing_context | |
3008 | { | |
3009 | /* The threads found on the remote target. */ | |
3010 | VEC (thread_item_t) *items; | |
3011 | }; | |
3012 | ||
3013 | /* Discard the contents of the constructed thread listing context. */ | |
3014 | ||
3015 | static void | |
3016 | clear_threads_listing_context (void *p) | |
3017 | { | |
3018 | struct threads_listing_context *context | |
3019 | = (struct threads_listing_context *) p; | |
3020 | int i; | |
3021 | struct thread_item *item; | |
3022 | ||
3023 | for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i) | |
3024 | { | |
3025 | xfree (item->extra); | |
3026 | xfree (item->name); | |
3027 | delete item->thread_handle; | |
3028 | } | |
3029 | ||
3030 | VEC_free (thread_item_t, context->items); | |
3031 | } | |
3032 | ||
3033 | /* Remove the thread specified as the related_pid field of WS | |
3034 | from the CONTEXT list. */ | |
3035 | ||
3036 | static void | |
3037 | threads_listing_context_remove (struct target_waitstatus *ws, | |
3038 | struct threads_listing_context *context) | |
3039 | { | |
3040 | struct thread_item *item; | |
3041 | int i; | |
3042 | ptid_t child_ptid = ws->value.related_pid; | |
3043 | ||
3044 | for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i) | |
3045 | { | |
3046 | if (ptid_equal (item->ptid, child_ptid)) | |
3047 | { | |
3048 | VEC_ordered_remove (thread_item_t, context->items, i); | |
3049 | break; | |
3050 | } | |
3051 | } | |
3052 | } | |
3053 | ||
3054 | static int | |
3055 | remote_newthread_step (threadref *ref, void *data) | |
3056 | { | |
3057 | struct threads_listing_context *context | |
3058 | = (struct threads_listing_context *) data; | |
3059 | struct thread_item item; | |
3060 | int pid = ptid_get_pid (inferior_ptid); | |
3061 | ||
3062 | item.ptid = ptid_build (pid, threadref_to_int (ref), 0); | |
3063 | item.core = -1; | |
3064 | item.name = NULL; | |
3065 | item.extra = NULL; | |
3066 | item.thread_handle = nullptr; | |
3067 | ||
3068 | VEC_safe_push (thread_item_t, context->items, &item); | |
3069 | ||
3070 | return 1; /* continue iterator */ | |
3071 | } | |
3072 | ||
3073 | #define CRAZY_MAX_THREADS 1000 | |
3074 | ||
3075 | static ptid_t | |
3076 | remote_current_thread (ptid_t oldpid) | |
3077 | { | |
3078 | struct remote_state *rs = get_remote_state (); | |
3079 | ||
3080 | putpkt ("qC"); | |
3081 | getpkt (&rs->buf, &rs->buf_size, 0); | |
3082 | if (rs->buf[0] == 'Q' && rs->buf[1] == 'C') | |
3083 | { | |
3084 | const char *obuf; | |
3085 | ptid_t result; | |
3086 | ||
3087 | result = read_ptid (&rs->buf[2], &obuf); | |
3088 | if (*obuf != '\0' && remote_debug) | |
3089 | fprintf_unfiltered (gdb_stdlog, | |
3090 | "warning: garbage in qC reply\n"); | |
3091 | ||
3092 | return result; | |
3093 | } | |
3094 | else | |
3095 | return oldpid; | |
3096 | } | |
3097 | ||
3098 | /* List remote threads using the deprecated qL packet. */ | |
3099 | ||
3100 | static int | |
3101 | remote_get_threads_with_ql (struct target_ops *ops, | |
3102 | struct threads_listing_context *context) | |
3103 | { | |
3104 | if (remote_threadlist_iterator (remote_newthread_step, context, | |
3105 | CRAZY_MAX_THREADS) >= 0) | |
3106 | return 1; | |
3107 | ||
3108 | return 0; | |
3109 | } | |
3110 | ||
3111 | #if defined(HAVE_LIBEXPAT) | |
3112 | ||
3113 | static void | |
3114 | start_thread (struct gdb_xml_parser *parser, | |
3115 | const struct gdb_xml_element *element, | |
3116 | void *user_data, VEC(gdb_xml_value_s) *attributes) | |
3117 | { | |
3118 | struct threads_listing_context *data | |
3119 | = (struct threads_listing_context *) user_data; | |
3120 | ||
3121 | struct thread_item item; | |
3122 | char *id; | |
3123 | struct gdb_xml_value *attr; | |
3124 | ||
3125 | id = (char *) xml_find_attribute (attributes, "id")->value; | |
3126 | item.ptid = read_ptid (id, NULL); | |
3127 | ||
3128 | attr = xml_find_attribute (attributes, "core"); | |
3129 | if (attr != NULL) | |
3130 | item.core = *(ULONGEST *) attr->value; | |
3131 | else | |
3132 | item.core = -1; | |
3133 | ||
3134 | attr = xml_find_attribute (attributes, "name"); | |
3135 | item.name = attr != NULL ? xstrdup ((const char *) attr->value) : NULL; | |
3136 | ||
3137 | attr = xml_find_attribute (attributes, "handle"); | |
3138 | if (attr != NULL) | |
3139 | { | |
3140 | item.thread_handle = new gdb::byte_vector | |
3141 | (strlen ((const char *) attr->value) / 2); | |
3142 | hex2bin ((const char *) attr->value, item.thread_handle->data (), | |
3143 | item.thread_handle->size ()); | |
3144 | } | |
3145 | else | |
3146 | item.thread_handle = nullptr; | |
3147 | ||
3148 | item.extra = 0; | |
3149 | ||
3150 | VEC_safe_push (thread_item_t, data->items, &item); | |
3151 | } | |
3152 | ||
3153 | static void | |
3154 | end_thread (struct gdb_xml_parser *parser, | |
3155 | const struct gdb_xml_element *element, | |
3156 | void *user_data, const char *body_text) | |
3157 | { | |
3158 | struct threads_listing_context *data | |
3159 | = (struct threads_listing_context *) user_data; | |
3160 | ||
3161 | if (body_text && *body_text) | |
3162 | VEC_last (thread_item_t, data->items)->extra = xstrdup (body_text); | |
3163 | } | |
3164 | ||
3165 | const struct gdb_xml_attribute thread_attributes[] = { | |
3166 | { "id", GDB_XML_AF_NONE, NULL, NULL }, | |
3167 | { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL }, | |
3168 | { "name", GDB_XML_AF_OPTIONAL, NULL, NULL }, | |
3169 | { "handle", GDB_XML_AF_OPTIONAL, NULL, NULL }, | |
3170 | { NULL, GDB_XML_AF_NONE, NULL, NULL } | |
3171 | }; | |
3172 | ||
3173 | const struct gdb_xml_element thread_children[] = { | |
3174 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } | |
3175 | }; | |
3176 | ||
3177 | const struct gdb_xml_element threads_children[] = { | |
3178 | { "thread", thread_attributes, thread_children, | |
3179 | GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, | |
3180 | start_thread, end_thread }, | |
3181 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } | |
3182 | }; | |
3183 | ||
3184 | const struct gdb_xml_element threads_elements[] = { | |
3185 | { "threads", NULL, threads_children, | |
3186 | GDB_XML_EF_NONE, NULL, NULL }, | |
3187 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } | |
3188 | }; | |
3189 | ||
3190 | #endif | |
3191 | ||
3192 | /* List remote threads using qXfer:threads:read. */ | |
3193 | ||
3194 | static int | |
3195 | remote_get_threads_with_qxfer (struct target_ops *ops, | |
3196 | struct threads_listing_context *context) | |
3197 | { | |
3198 | #if defined(HAVE_LIBEXPAT) | |
3199 | if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE) | |
3200 | { | |
3201 | gdb::unique_xmalloc_ptr<char> xml | |
3202 | = target_read_stralloc (ops, TARGET_OBJECT_THREADS, NULL); | |
3203 | ||
3204 | if (xml != NULL && *xml != '\0') | |
3205 | { | |
3206 | gdb_xml_parse_quick (_("threads"), "threads.dtd", | |
3207 | threads_elements, xml.get (), context); | |
3208 | } | |
3209 | ||
3210 | return 1; | |
3211 | } | |
3212 | #endif | |
3213 | ||
3214 | return 0; | |
3215 | } | |
3216 | ||
3217 | /* List remote threads using qfThreadInfo/qsThreadInfo. */ | |
3218 | ||
3219 | static int | |
3220 | remote_get_threads_with_qthreadinfo (struct target_ops *ops, | |
3221 | struct threads_listing_context *context) | |
3222 | { | |
3223 | struct remote_state *rs = get_remote_state (); | |
3224 | ||
3225 | if (rs->use_threadinfo_query) | |
3226 | { | |
3227 | const char *bufp; | |
3228 | ||
3229 | putpkt ("qfThreadInfo"); | |
3230 | getpkt (&rs->buf, &rs->buf_size, 0); | |
3231 | bufp = rs->buf; | |
3232 | if (bufp[0] != '\0') /* q packet recognized */ | |
3233 | { | |
3234 | while (*bufp++ == 'm') /* reply contains one or more TID */ | |
3235 | { | |
3236 | do | |
3237 | { | |
3238 | struct thread_item item; | |
3239 | ||
3240 | item.ptid = read_ptid (bufp, &bufp); | |
3241 | item.core = -1; | |
3242 | item.name = NULL; | |
3243 | item.extra = NULL; | |
3244 | item.thread_handle = nullptr; | |
3245 | ||
3246 | VEC_safe_push (thread_item_t, context->items, &item); | |
3247 | } | |
3248 | while (*bufp++ == ','); /* comma-separated list */ | |
3249 | putpkt ("qsThreadInfo"); | |
3250 | getpkt (&rs->buf, &rs->buf_size, 0); | |
3251 | bufp = rs->buf; | |
3252 | } | |
3253 | return 1; | |
3254 | } | |
3255 | else | |
3256 | { | |
3257 | /* Packet not recognized. */ | |
3258 | rs->use_threadinfo_query = 0; | |
3259 | } | |
3260 | } | |
3261 | ||
3262 | return 0; | |
3263 | } | |
3264 | ||
3265 | /* Implement the to_update_thread_list function for the remote | |
3266 | targets. */ | |
3267 | ||
3268 | static void | |
3269 | remote_update_thread_list (struct target_ops *ops) | |
3270 | { | |
3271 | struct threads_listing_context context; | |
3272 | struct cleanup *old_chain; | |
3273 | int got_list = 0; | |
3274 | ||
3275 | context.items = NULL; | |
3276 | old_chain = make_cleanup (clear_threads_listing_context, &context); | |
3277 | ||
3278 | /* We have a few different mechanisms to fetch the thread list. Try | |
3279 | them all, starting with the most preferred one first, falling | |
3280 | back to older methods. */ | |
3281 | if (remote_get_threads_with_qxfer (ops, &context) | |
3282 | || remote_get_threads_with_qthreadinfo (ops, &context) | |
3283 | || remote_get_threads_with_ql (ops, &context)) | |
3284 | { | |
3285 | int i; | |
3286 | struct thread_item *item; | |
3287 | struct thread_info *tp, *tmp; | |
3288 | ||
3289 | got_list = 1; | |
3290 | ||
3291 | if (VEC_empty (thread_item_t, context.items) | |
3292 | && remote_thread_always_alive (ops, inferior_ptid)) | |
3293 | { | |
3294 | /* Some targets don't really support threads, but still | |
3295 | reply an (empty) thread list in response to the thread | |
3296 | listing packets, instead of replying "packet not | |
3297 | supported". Exit early so we don't delete the main | |
3298 | thread. */ | |
3299 | do_cleanups (old_chain); | |
3300 | return; | |
3301 | } | |
3302 | ||
3303 | /* CONTEXT now holds the current thread list on the remote | |
3304 | target end. Delete GDB-side threads no longer found on the | |
3305 | target. */ | |
3306 | ALL_THREADS_SAFE (tp, tmp) | |
3307 | { | |
3308 | for (i = 0; | |
3309 | VEC_iterate (thread_item_t, context.items, i, item); | |
3310 | ++i) | |
3311 | { | |
3312 | if (ptid_equal (item->ptid, tp->ptid)) | |
3313 | break; | |
3314 | } | |
3315 | ||
3316 | if (i == VEC_length (thread_item_t, context.items)) | |
3317 | { | |
3318 | /* Not found. */ | |
3319 | delete_thread (tp->ptid); | |
3320 | } | |
3321 | } | |
3322 | ||
3323 | /* Remove any unreported fork child threads from CONTEXT so | |
3324 | that we don't interfere with follow fork, which is where | |
3325 | creation of such threads is handled. */ | |
3326 | remove_new_fork_children (&context); | |
3327 | ||
3328 | /* And now add threads we don't know about yet to our list. */ | |
3329 | for (i = 0; | |
3330 | VEC_iterate (thread_item_t, context.items, i, item); | |
3331 | ++i) | |
3332 | { | |
3333 | if (!ptid_equal (item->ptid, null_ptid)) | |
3334 | { | |
3335 | struct private_thread_info *info; | |
3336 | /* In non-stop mode, we assume new found threads are | |
3337 | executing until proven otherwise with a stop reply. | |
3338 | In all-stop, we can only get here if all threads are | |
3339 | stopped. */ | |
3340 | int executing = target_is_non_stop_p () ? 1 : 0; | |
3341 | ||
3342 | remote_notice_new_inferior (item->ptid, executing); | |
3343 | ||
3344 | info = get_private_info_ptid (item->ptid); | |
3345 | info->core = item->core; | |
3346 | info->extra = item->extra; | |
3347 | item->extra = NULL; | |
3348 | info->name = item->name; | |
3349 | item->name = NULL; | |
3350 | info->thread_handle = item->thread_handle; | |
3351 | item->thread_handle = nullptr; | |
3352 | } | |
3353 | } | |
3354 | } | |
3355 | ||
3356 | if (!got_list) | |
3357 | { | |
3358 | /* If no thread listing method is supported, then query whether | |
3359 | each known thread is alive, one by one, with the T packet. | |
3360 | If the target doesn't support threads at all, then this is a | |
3361 | no-op. See remote_thread_alive. */ | |
3362 | prune_threads (); | |
3363 | } | |
3364 | ||
3365 | do_cleanups (old_chain); | |
3366 | } | |
3367 | ||
3368 | /* | |
3369 | * Collect a descriptive string about the given thread. | |
3370 | * The target may say anything it wants to about the thread | |
3371 | * (typically info about its blocked / runnable state, name, etc.). | |
3372 | * This string will appear in the info threads display. | |
3373 | * | |
3374 | * Optional: targets are not required to implement this function. | |
3375 | */ | |
3376 | ||
3377 | static const char * | |
3378 | remote_threads_extra_info (struct target_ops *self, struct thread_info *tp) | |
3379 | { | |
3380 | struct remote_state *rs = get_remote_state (); | |
3381 | int result; | |
3382 | int set; | |
3383 | threadref id; | |
3384 | struct gdb_ext_thread_info threadinfo; | |
3385 | static char display_buf[100]; /* arbitrary... */ | |
3386 | int n = 0; /* position in display_buf */ | |
3387 | ||
3388 | if (rs->remote_desc == 0) /* paranoia */ | |
3389 | internal_error (__FILE__, __LINE__, | |
3390 | _("remote_threads_extra_info")); | |
3391 | ||
3392 | if (ptid_equal (tp->ptid, magic_null_ptid) | |
3393 | || (ptid_get_pid (tp->ptid) != 0 && ptid_get_lwp (tp->ptid) == 0)) | |
3394 | /* This is the main thread which was added by GDB. The remote | |
3395 | server doesn't know about it. */ | |
3396 | return NULL; | |
3397 | ||
3398 | if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE) | |
3399 | { | |
3400 | struct thread_info *info = find_thread_ptid (tp->ptid); | |
3401 | ||
3402 | if (info && info->priv) | |
3403 | return info->priv->extra; | |
3404 | else | |
3405 | return NULL; | |
3406 | } | |
3407 | ||
3408 | if (rs->use_threadextra_query) | |
3409 | { | |
3410 | char *b = rs->buf; | |
3411 | char *endb = rs->buf + get_remote_packet_size (); | |
3412 | ||
3413 | xsnprintf (b, endb - b, "qThreadExtraInfo,"); | |
3414 | b += strlen (b); | |
3415 | write_ptid (b, endb, tp->ptid); | |
3416 | ||
3417 | putpkt (rs->buf); | |
3418 | getpkt (&rs->buf, &rs->buf_size, 0); | |
3419 | if (rs->buf[0] != 0) | |
3420 | { | |
3421 | n = std::min (strlen (rs->buf) / 2, sizeof (display_buf)); | |
3422 | result = hex2bin (rs->buf, (gdb_byte *) display_buf, n); | |
3423 | display_buf [result] = '\0'; | |
3424 | return display_buf; | |
3425 | } | |
3426 | } | |
3427 | ||
3428 | /* If the above query fails, fall back to the old method. */ | |
3429 | rs->use_threadextra_query = 0; | |
3430 | set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME | |
3431 | | TAG_MOREDISPLAY | TAG_DISPLAY; | |
3432 | int_to_threadref (&id, ptid_get_lwp (tp->ptid)); | |
3433 | if (remote_get_threadinfo (&id, set, &threadinfo)) | |
3434 | if (threadinfo.active) | |
3435 | { | |
3436 | if (*threadinfo.shortname) | |
3437 | n += xsnprintf (&display_buf[0], sizeof (display_buf) - n, | |
3438 | " Name: %s,", threadinfo.shortname); | |
3439 | if (*threadinfo.display) | |
3440 | n += xsnprintf (&display_buf[n], sizeof (display_buf) - n, | |
3441 | " State: %s,", threadinfo.display); | |
3442 | if (*threadinfo.more_display) | |
3443 | n += xsnprintf (&display_buf[n], sizeof (display_buf) - n, | |
3444 | " Priority: %s", threadinfo.more_display); | |
3445 | ||
3446 | if (n > 0) | |
3447 | { | |
3448 | /* For purely cosmetic reasons, clear up trailing commas. */ | |
3449 | if (',' == display_buf[n-1]) | |
3450 | display_buf[n-1] = ' '; | |
3451 | return display_buf; | |
3452 | } | |
3453 | } | |
3454 | return NULL; | |
3455 | } | |
3456 | \f | |
3457 | ||
3458 | static int | |
3459 | remote_static_tracepoint_marker_at (struct target_ops *self, CORE_ADDR addr, | |
3460 | struct static_tracepoint_marker *marker) | |
3461 | { | |
3462 | struct remote_state *rs = get_remote_state (); | |
3463 | char *p = rs->buf; | |
3464 | ||
3465 | xsnprintf (p, get_remote_packet_size (), "qTSTMat:"); | |
3466 | p += strlen (p); | |
3467 | p += hexnumstr (p, addr); | |
3468 | putpkt (rs->buf); | |
3469 | getpkt (&rs->buf, &rs->buf_size, 0); | |
3470 | p = rs->buf; | |
3471 | ||
3472 | if (*p == 'E') | |
3473 | error (_("Remote failure reply: %s"), p); | |
3474 | ||
3475 | if (*p++ == 'm') | |
3476 | { | |
3477 | parse_static_tracepoint_marker_definition (p, NULL, marker); | |
3478 | return 1; | |
3479 | } | |
3480 | ||
3481 | return 0; | |
3482 | } | |
3483 | ||
3484 | static VEC(static_tracepoint_marker_p) * | |
3485 | remote_static_tracepoint_markers_by_strid (struct target_ops *self, | |
3486 | const char *strid) | |
3487 | { | |
3488 | struct remote_state *rs = get_remote_state (); | |
3489 | VEC(static_tracepoint_marker_p) *markers = NULL; | |
3490 | struct static_tracepoint_marker *marker = NULL; | |
3491 | struct cleanup *old_chain; | |
3492 | const char *p; | |
3493 | ||
3494 | /* Ask for a first packet of static tracepoint marker | |
3495 | definition. */ | |
3496 | putpkt ("qTfSTM"); | |
3497 | getpkt (&rs->buf, &rs->buf_size, 0); | |
3498 | p = rs->buf; | |
3499 | if (*p == 'E') | |
3500 | error (_("Remote failure reply: %s"), p); | |
3501 | ||
3502 | old_chain = make_cleanup (free_current_marker, &marker); | |
3503 | ||
3504 | while (*p++ == 'm') | |
3505 | { | |
3506 | if (marker == NULL) | |
3507 | marker = XCNEW (struct static_tracepoint_marker); | |
3508 | ||
3509 | do | |
3510 | { | |
3511 | parse_static_tracepoint_marker_definition (p, &p, marker); | |
3512 | ||
3513 | if (strid == NULL || strcmp (strid, marker->str_id) == 0) | |
3514 | { | |
3515 | VEC_safe_push (static_tracepoint_marker_p, | |
3516 | markers, marker); | |
3517 | marker = NULL; | |
3518 | } | |
3519 | else | |
3520 | { | |
3521 | release_static_tracepoint_marker (marker); | |
3522 | memset (marker, 0, sizeof (*marker)); | |
3523 | } | |
3524 | } | |
3525 | while (*p++ == ','); /* comma-separated list */ | |
3526 | /* Ask for another packet of static tracepoint definition. */ | |
3527 | putpkt ("qTsSTM"); | |
3528 | getpkt (&rs->buf, &rs->buf_size, 0); | |
3529 | p = rs->buf; | |
3530 | } | |
3531 | ||
3532 | do_cleanups (old_chain); | |
3533 | return markers; | |
3534 | } | |
3535 | ||
3536 | \f | |
3537 | /* Implement the to_get_ada_task_ptid function for the remote targets. */ | |
3538 | ||
3539 | static ptid_t | |
3540 | remote_get_ada_task_ptid (struct target_ops *self, long lwp, long thread) | |
3541 | { | |
3542 | return ptid_build (ptid_get_pid (inferior_ptid), lwp, 0); | |
3543 | } | |
3544 | \f | |
3545 | ||
3546 | /* Restart the remote side; this is an extended protocol operation. */ | |
3547 | ||
3548 | static void | |
3549 | extended_remote_restart (void) | |
3550 | { | |
3551 | struct remote_state *rs = get_remote_state (); | |
3552 | ||
3553 | /* Send the restart command; for reasons I don't understand the | |
3554 | remote side really expects a number after the "R". */ | |
3555 | xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0); | |
3556 | putpkt (rs->buf); | |
3557 | ||
3558 | remote_fileio_reset (); | |
3559 | } | |
3560 | \f | |
3561 | /* Clean up connection to a remote debugger. */ | |
3562 | ||
3563 | static void | |
3564 | remote_close (struct target_ops *self) | |
3565 | { | |
3566 | struct remote_state *rs = get_remote_state (); | |
3567 | ||
3568 | if (rs->remote_desc == NULL) | |
3569 | return; /* already closed */ | |
3570 | ||
3571 | /* Make sure we leave stdin registered in the event loop. */ | |
3572 | remote_terminal_ours (self); | |
3573 | ||
3574 | serial_close (rs->remote_desc); | |
3575 | rs->remote_desc = NULL; | |
3576 | ||
3577 | /* We don't have a connection to the remote stub anymore. Get rid | |
3578 | of all the inferiors and their threads we were controlling. | |
3579 | Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame | |
3580 | will be unable to find the thread corresponding to (pid, 0, 0). */ | |
3581 | inferior_ptid = null_ptid; | |
3582 | discard_all_inferiors (); | |
3583 | ||
3584 | /* We are closing the remote target, so we should discard | |
3585 | everything of this target. */ | |
3586 | discard_pending_stop_replies_in_queue (rs); | |
3587 | ||
3588 | if (remote_async_inferior_event_token) | |
3589 | delete_async_event_handler (&remote_async_inferior_event_token); | |
3590 | ||
3591 | remote_notif_state_xfree (rs->notif_state); | |
3592 | ||
3593 | trace_reset_local_state (); | |
3594 | } | |
3595 | ||
3596 | /* Query the remote side for the text, data and bss offsets. */ | |
3597 | ||
3598 | static void | |
3599 | get_offsets (void) | |
3600 | { | |
3601 | struct remote_state *rs = get_remote_state (); | |
3602 | char *buf; | |
3603 | char *ptr; | |
3604 | int lose, num_segments = 0, do_sections, do_segments; | |
3605 | CORE_ADDR text_addr, data_addr, bss_addr, segments[2]; | |
3606 | struct section_offsets *offs; | |
3607 | struct symfile_segment_data *data; | |
3608 | ||
3609 | if (symfile_objfile == NULL) | |
3610 | return; | |
3611 | ||
3612 | putpkt ("qOffsets"); | |
3613 | getpkt (&rs->buf, &rs->buf_size, 0); | |
3614 | buf = rs->buf; | |
3615 | ||
3616 | if (buf[0] == '\000') | |
3617 | return; /* Return silently. Stub doesn't support | |
3618 | this command. */ | |
3619 | if (buf[0] == 'E') | |
3620 | { | |
3621 | warning (_("Remote failure reply: %s"), buf); | |
3622 | return; | |
3623 | } | |
3624 | ||
3625 | /* Pick up each field in turn. This used to be done with scanf, but | |
3626 | scanf will make trouble if CORE_ADDR size doesn't match | |
3627 | conversion directives correctly. The following code will work | |
3628 | with any size of CORE_ADDR. */ | |
3629 | text_addr = data_addr = bss_addr = 0; | |
3630 | ptr = buf; | |
3631 | lose = 0; | |
3632 | ||
3633 | if (startswith (ptr, "Text=")) | |
3634 | { | |
3635 | ptr += 5; | |
3636 | /* Don't use strtol, could lose on big values. */ | |
3637 | while (*ptr && *ptr != ';') | |
3638 | text_addr = (text_addr << 4) + fromhex (*ptr++); | |
3639 | ||
3640 | if (startswith (ptr, ";Data=")) | |
3641 | { | |
3642 | ptr += 6; | |
3643 | while (*ptr && *ptr != ';') | |
3644 | data_addr = (data_addr << 4) + fromhex (*ptr++); | |
3645 | } | |
3646 | else | |
3647 | lose = 1; | |
3648 | ||
3649 | if (!lose && startswith (ptr, ";Bss=")) | |
3650 | { | |
3651 | ptr += 5; | |
3652 | while (*ptr && *ptr != ';') | |
3653 | bss_addr = (bss_addr << 4) + fromhex (*ptr++); | |
3654 | ||
3655 | if (bss_addr != data_addr) | |
3656 | warning (_("Target reported unsupported offsets: %s"), buf); | |
3657 | } | |
3658 | else | |
3659 | lose = 1; | |
3660 | } | |
3661 | else if (startswith (ptr, "TextSeg=")) | |
3662 | { | |
3663 | ptr += 8; | |
3664 | /* Don't use strtol, could lose on big values. */ | |
3665 | while (*ptr && *ptr != ';') | |
3666 | text_addr = (text_addr << 4) + fromhex (*ptr++); | |
3667 | num_segments = 1; | |
3668 | ||
3669 | if (startswith (ptr, ";DataSeg=")) | |
3670 | { | |
3671 | ptr += 9; | |
3672 | while (*ptr && *ptr != ';') | |
3673 | data_addr = (data_addr << 4) + fromhex (*ptr++); | |
3674 | num_segments++; | |
3675 | } | |
3676 | } | |
3677 | else | |
3678 | lose = 1; | |
3679 | ||
3680 | if (lose) | |
3681 | error (_("Malformed response to offset query, %s"), buf); | |
3682 | else if (*ptr != '\0') | |
3683 | warning (_("Target reported unsupported offsets: %s"), buf); | |
3684 | ||
3685 | offs = ((struct section_offsets *) | |
3686 | alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections))); | |
3687 | memcpy (offs, symfile_objfile->section_offsets, | |
3688 | SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)); | |
3689 | ||
3690 | data = get_symfile_segment_data (symfile_objfile->obfd); | |
3691 | do_segments = (data != NULL); | |
3692 | do_sections = num_segments == 0; | |
3693 | ||
3694 | if (num_segments > 0) | |
3695 | { | |
3696 | segments[0] = text_addr; | |
3697 | segments[1] = data_addr; | |
3698 | } | |
3699 | /* If we have two segments, we can still try to relocate everything | |
3700 | by assuming that the .text and .data offsets apply to the whole | |
3701 | text and data segments. Convert the offsets given in the packet | |
3702 | to base addresses for symfile_map_offsets_to_segments. */ | |
3703 | else if (data && data->num_segments == 2) | |
3704 | { | |
3705 | segments[0] = data->segment_bases[0] + text_addr; | |
3706 | segments[1] = data->segment_bases[1] + data_addr; | |
3707 | num_segments = 2; | |
3708 | } | |
3709 | /* If the object file has only one segment, assume that it is text | |
3710 | rather than data; main programs with no writable data are rare, | |
3711 | but programs with no code are useless. Of course the code might | |
3712 | have ended up in the data segment... to detect that we would need | |
3713 | the permissions here. */ | |
3714 | else if (data && data->num_segments == 1) | |
3715 | { | |
3716 | segments[0] = data->segment_bases[0] + text_addr; | |
3717 | num_segments = 1; | |
3718 | } | |
3719 | /* There's no way to relocate by segment. */ | |
3720 | else | |
3721 | do_segments = 0; | |
3722 | ||
3723 | if (do_segments) | |
3724 | { | |
3725 | int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data, | |
3726 | offs, num_segments, segments); | |
3727 | ||
3728 | if (ret == 0 && !do_sections) | |
3729 | error (_("Can not handle qOffsets TextSeg " | |
3730 | "response with this symbol file")); | |
3731 | ||
3732 | if (ret > 0) | |
3733 | do_sections = 0; | |
3734 | } | |
3735 | ||
3736 | if (data) | |
3737 | free_symfile_segment_data (data); | |
3738 | ||
3739 | if (do_sections) | |
3740 | { | |
3741 | offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr; | |
3742 | ||
3743 | /* This is a temporary kludge to force data and bss to use the | |
3744 | same offsets because that's what nlmconv does now. The real | |
3745 | solution requires changes to the stub and remote.c that I | |
3746 | don't have time to do right now. */ | |
3747 | ||
3748 | offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr; | |
3749 | offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr; | |
3750 | } | |
3751 | ||
3752 | objfile_relocate (symfile_objfile, offs); | |
3753 | } | |
3754 | ||
3755 | /* Send interrupt_sequence to remote target. */ | |
3756 | static void | |
3757 | send_interrupt_sequence (void) | |
3758 | { | |
3759 | struct remote_state *rs = get_remote_state (); | |
3760 | ||
3761 | if (interrupt_sequence_mode == interrupt_sequence_control_c) | |
3762 | remote_serial_write ("\x03", 1); | |
3763 | else if (interrupt_sequence_mode == interrupt_sequence_break) | |
3764 | serial_send_break (rs->remote_desc); | |
3765 | else if (interrupt_sequence_mode == interrupt_sequence_break_g) | |
3766 | { | |
3767 | serial_send_break (rs->remote_desc); | |
3768 | remote_serial_write ("g", 1); | |
3769 | } | |
3770 | else | |
3771 | internal_error (__FILE__, __LINE__, | |
3772 | _("Invalid value for interrupt_sequence_mode: %s."), | |
3773 | interrupt_sequence_mode); | |
3774 | } | |
3775 | ||
3776 | ||
3777 | /* If STOP_REPLY is a T stop reply, look for the "thread" register, | |
3778 | and extract the PTID. Returns NULL_PTID if not found. */ | |
3779 | ||
3780 | static ptid_t | |
3781 | stop_reply_extract_thread (char *stop_reply) | |
3782 | { | |
3783 | if (stop_reply[0] == 'T' && strlen (stop_reply) > 3) | |
3784 | { | |
3785 | const char *p; | |
3786 | ||
3787 | /* Txx r:val ; r:val (...) */ | |
3788 | p = &stop_reply[3]; | |
3789 | ||
3790 | /* Look for "register" named "thread". */ | |
3791 | while (*p != '\0') | |
3792 | { | |
3793 | const char *p1; | |
3794 | ||
3795 | p1 = strchr (p, ':'); | |
3796 | if (p1 == NULL) | |
3797 | return null_ptid; | |
3798 | ||
3799 | if (strncmp (p, "thread", p1 - p) == 0) | |
3800 | return read_ptid (++p1, &p); | |
3801 | ||
3802 | p1 = strchr (p, ';'); | |
3803 | if (p1 == NULL) | |
3804 | return null_ptid; | |
3805 | p1++; | |
3806 | ||
3807 | p = p1; | |
3808 | } | |
3809 | } | |
3810 | ||
3811 | return null_ptid; | |
3812 | } | |
3813 | ||
3814 | /* Determine the remote side's current thread. If we have a stop | |
3815 | reply handy (in WAIT_STATUS), maybe it's a T stop reply with a | |
3816 | "thread" register we can extract the current thread from. If not, | |
3817 | ask the remote which is the current thread with qC. The former | |
3818 | method avoids a roundtrip. */ | |
3819 | ||
3820 | static ptid_t | |
3821 | get_current_thread (char *wait_status) | |
3822 | { | |
3823 | ptid_t ptid = null_ptid; | |
3824 | ||
3825 | /* Note we don't use remote_parse_stop_reply as that makes use of | |
3826 | the target architecture, which we haven't yet fully determined at | |
3827 | this point. */ | |
3828 | if (wait_status != NULL) | |
3829 | ptid = stop_reply_extract_thread (wait_status); | |
3830 | if (ptid_equal (ptid, null_ptid)) | |
3831 | ptid = remote_current_thread (inferior_ptid); | |
3832 | ||
3833 | return ptid; | |
3834 | } | |
3835 | ||
3836 | /* Query the remote target for which is the current thread/process, | |
3837 | add it to our tables, and update INFERIOR_PTID. The caller is | |
3838 | responsible for setting the state such that the remote end is ready | |
3839 | to return the current thread. | |
3840 | ||
3841 | This function is called after handling the '?' or 'vRun' packets, | |
3842 | whose response is a stop reply from which we can also try | |
3843 | extracting the thread. If the target doesn't support the explicit | |
3844 | qC query, we infer the current thread from that stop reply, passed | |
3845 | in in WAIT_STATUS, which may be NULL. */ | |
3846 | ||
3847 | static void | |
3848 | add_current_inferior_and_thread (char *wait_status) | |
3849 | { | |
3850 | struct remote_state *rs = get_remote_state (); | |
3851 | int fake_pid_p = 0; | |
3852 | ||
3853 | inferior_ptid = null_ptid; | |
3854 | ||
3855 | /* Now, if we have thread information, update inferior_ptid. */ | |
3856 | ptid_t curr_ptid = get_current_thread (wait_status); | |
3857 | ||
3858 | if (curr_ptid != null_ptid) | |
3859 | { | |
3860 | if (!remote_multi_process_p (rs)) | |
3861 | fake_pid_p = 1; | |
3862 | } | |
3863 | else | |
3864 | { | |
3865 | /* Without this, some commands which require an active target | |
3866 | (such as kill) won't work. This variable serves (at least) | |
3867 | double duty as both the pid of the target process (if it has | |
3868 | such), and as a flag indicating that a target is active. */ | |
3869 | curr_ptid = magic_null_ptid; | |
3870 | fake_pid_p = 1; | |
3871 | } | |
3872 | ||
3873 | remote_add_inferior (fake_pid_p, ptid_get_pid (curr_ptid), -1, 1); | |
3874 | ||
3875 | /* Add the main thread and switch to it. Don't try reading | |
3876 | registers yet, since we haven't fetched the target description | |
3877 | yet. */ | |
3878 | thread_info *tp = add_thread_silent (curr_ptid); | |
3879 | switch_to_thread_no_regs (tp); | |
3880 | } | |
3881 | ||
3882 | /* Print info about a thread that was found already stopped on | |
3883 | connection. */ | |
3884 | ||
3885 | static void | |
3886 | print_one_stopped_thread (struct thread_info *thread) | |
3887 | { | |
3888 | struct target_waitstatus *ws = &thread->suspend.waitstatus; | |
3889 | ||
3890 | switch_to_thread (thread->ptid); | |
3891 | stop_pc = get_frame_pc (get_current_frame ()); | |
3892 | set_current_sal_from_frame (get_current_frame ()); | |
3893 | ||
3894 | thread->suspend.waitstatus_pending_p = 0; | |
3895 | ||
3896 | if (ws->kind == TARGET_WAITKIND_STOPPED) | |
3897 | { | |
3898 | enum gdb_signal sig = ws->value.sig; | |
3899 | ||
3900 | if (signal_print_state (sig)) | |
3901 | observer_notify_signal_received (sig); | |
3902 | } | |
3903 | observer_notify_normal_stop (NULL, 1); | |
3904 | } | |
3905 | ||
3906 | /* Process all initial stop replies the remote side sent in response | |
3907 | to the ? packet. These indicate threads that were already stopped | |
3908 | on initial connection. We mark these threads as stopped and print | |
3909 | their current frame before giving the user the prompt. */ | |
3910 | ||
3911 | static void | |
3912 | process_initial_stop_replies (int from_tty) | |
3913 | { | |
3914 | int pending_stop_replies = stop_reply_queue_length (); | |
3915 | struct inferior *inf; | |
3916 | struct thread_info *thread; | |
3917 | struct thread_info *selected = NULL; | |
3918 | struct thread_info *lowest_stopped = NULL; | |
3919 | struct thread_info *first = NULL; | |
3920 | ||
3921 | /* Consume the initial pending events. */ | |
3922 | while (pending_stop_replies-- > 0) | |
3923 | { | |
3924 | ptid_t waiton_ptid = minus_one_ptid; | |
3925 | ptid_t event_ptid; | |
3926 | struct target_waitstatus ws; | |
3927 | int ignore_event = 0; | |
3928 | struct thread_info *thread; | |
3929 | ||
3930 | memset (&ws, 0, sizeof (ws)); | |
3931 | event_ptid = target_wait (waiton_ptid, &ws, TARGET_WNOHANG); | |
3932 | if (remote_debug) | |
3933 | print_target_wait_results (waiton_ptid, event_ptid, &ws); | |
3934 | ||
3935 | switch (ws.kind) | |
3936 | { | |
3937 | case TARGET_WAITKIND_IGNORE: | |
3938 | case TARGET_WAITKIND_NO_RESUMED: | |
3939 | case TARGET_WAITKIND_SIGNALLED: | |
3940 | case TARGET_WAITKIND_EXITED: | |
3941 | /* We shouldn't see these, but if we do, just ignore. */ | |
3942 | if (remote_debug) | |
3943 | fprintf_unfiltered (gdb_stdlog, "remote: event ignored\n"); | |
3944 | ignore_event = 1; | |
3945 | break; | |
3946 | ||
3947 | case TARGET_WAITKIND_EXECD: | |
3948 | xfree (ws.value.execd_pathname); | |
3949 | break; | |
3950 | default: | |
3951 | break; | |
3952 | } | |
3953 | ||
3954 | if (ignore_event) | |
3955 | continue; | |
3956 | ||
3957 | thread = find_thread_ptid (event_ptid); | |
3958 | ||
3959 | if (ws.kind == TARGET_WAITKIND_STOPPED) | |
3960 | { | |
3961 | enum gdb_signal sig = ws.value.sig; | |
3962 | ||
3963 | /* Stubs traditionally report SIGTRAP as initial signal, | |
3964 | instead of signal 0. Suppress it. */ | |
3965 | if (sig == GDB_SIGNAL_TRAP) | |
3966 | sig = GDB_SIGNAL_0; | |
3967 | thread->suspend.stop_signal = sig; | |
3968 | ws.value.sig = sig; | |
3969 | } | |
3970 | ||
3971 | thread->suspend.waitstatus = ws; | |
3972 | ||
3973 | if (ws.kind != TARGET_WAITKIND_STOPPED | |
3974 | || ws.value.sig != GDB_SIGNAL_0) | |
3975 | thread->suspend.waitstatus_pending_p = 1; | |
3976 | ||
3977 | set_executing (event_ptid, 0); | |
3978 | set_running (event_ptid, 0); | |
3979 | thread->priv->vcont_resumed = 0; | |
3980 | } | |
3981 | ||
3982 | /* "Notice" the new inferiors before anything related to | |
3983 | registers/memory. */ | |
3984 | ALL_INFERIORS (inf) | |
3985 | { | |
3986 | if (inf->pid == 0) | |
3987 | continue; | |
3988 | ||
3989 | inf->needs_setup = 1; | |
3990 | ||
3991 | if (non_stop) | |
3992 | { | |
3993 | thread = any_live_thread_of_process (inf->pid); | |
3994 | notice_new_inferior (thread->ptid, | |
3995 | thread->state == THREAD_RUNNING, | |
3996 | from_tty); | |
3997 | } | |
3998 | } | |
3999 | ||
4000 | /* If all-stop on top of non-stop, pause all threads. Note this | |
4001 | records the threads' stop pc, so must be done after "noticing" | |
4002 | the inferiors. */ | |
4003 | if (!non_stop) | |
4004 | { | |
4005 | stop_all_threads (); | |
4006 | ||
4007 | /* If all threads of an inferior were already stopped, we | |
4008 | haven't setup the inferior yet. */ | |
4009 | ALL_INFERIORS (inf) | |
4010 | { | |
4011 | if (inf->pid == 0) | |
4012 | continue; | |
4013 | ||
4014 | if (inf->needs_setup) | |
4015 | { | |
4016 | thread = any_live_thread_of_process (inf->pid); | |
4017 | switch_to_thread_no_regs (thread); | |
4018 | setup_inferior (0); | |
4019 | } | |
4020 | } | |
4021 | } | |
4022 | ||
4023 | /* Now go over all threads that are stopped, and print their current | |
4024 | frame. If all-stop, then if there's a signalled thread, pick | |
4025 | that as current. */ | |
4026 | ALL_NON_EXITED_THREADS (thread) | |
4027 | { | |
4028 | if (first == NULL) | |
4029 | first = thread; | |
4030 | ||
4031 | if (!non_stop) | |
4032 | set_running (thread->ptid, 0); | |
4033 | else if (thread->state != THREAD_STOPPED) | |
4034 | continue; | |
4035 | ||
4036 | if (selected == NULL | |
4037 | && thread->suspend.waitstatus_pending_p) | |
4038 | selected = thread; | |
4039 | ||
4040 | if (lowest_stopped == NULL | |
4041 | || thread->inf->num < lowest_stopped->inf->num | |
4042 | || thread->per_inf_num < lowest_stopped->per_inf_num) | |
4043 | lowest_stopped = thread; | |
4044 | ||
4045 | if (non_stop) | |
4046 | print_one_stopped_thread (thread); | |
4047 | } | |
4048 | ||
4049 | /* In all-stop, we only print the status of one thread, and leave | |
4050 | others with their status pending. */ | |
4051 | if (!non_stop) | |
4052 | { | |
4053 | thread = selected; | |
4054 | if (thread == NULL) | |
4055 | thread = lowest_stopped; | |
4056 | if (thread == NULL) | |
4057 | thread = first; | |
4058 | ||
4059 | print_one_stopped_thread (thread); | |
4060 | } | |
4061 | ||
4062 | /* For "info program". */ | |
4063 | thread = inferior_thread (); | |
4064 | if (thread->state == THREAD_STOPPED) | |
4065 | set_last_target_status (inferior_ptid, thread->suspend.waitstatus); | |
4066 | } | |
4067 | ||
4068 | /* Start the remote connection and sync state. */ | |
4069 | ||
4070 | static void | |
4071 | remote_start_remote (int from_tty, struct target_ops *target, int extended_p) | |
4072 | { | |
4073 | struct remote_state *rs = get_remote_state (); | |
4074 | struct packet_config *noack_config; | |
4075 | char *wait_status = NULL; | |
4076 | ||
4077 | /* Signal other parts that we're going through the initial setup, | |
4078 | and so things may not be stable yet. E.g., we don't try to | |
4079 | install tracepoints until we've relocated symbols. Also, a | |
4080 | Ctrl-C before we're connected and synced up can't interrupt the | |
4081 | target. Instead, it offers to drop the (potentially wedged) | |
4082 | connection. */ | |
4083 | rs->starting_up = 1; | |
4084 | ||
4085 | QUIT; | |
4086 | ||
4087 | if (interrupt_on_connect) | |
4088 | send_interrupt_sequence (); | |
4089 | ||
4090 | /* Ack any packet which the remote side has already sent. */ | |
4091 | remote_serial_write ("+", 1); | |
4092 | ||
4093 | /* The first packet we send to the target is the optional "supported | |
4094 | packets" request. If the target can answer this, it will tell us | |
4095 | which later probes to skip. */ | |
4096 | remote_query_supported (); | |
4097 | ||
4098 | /* If the stub wants to get a QAllow, compose one and send it. */ | |
4099 | if (packet_support (PACKET_QAllow) != PACKET_DISABLE) | |
4100 | remote_set_permissions (target); | |
4101 | ||
4102 | /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any | |
4103 | unknown 'v' packet with string "OK". "OK" gets interpreted by GDB | |
4104 | as a reply to known packet. For packet "vFile:setfs:" it is an | |
4105 | invalid reply and GDB would return error in | |
4106 | remote_hostio_set_filesystem, making remote files access impossible. | |
4107 | Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as | |
4108 | other "vFile" packets get correctly detected even on gdbserver < 7.7. */ | |
4109 | { | |
4110 | const char v_mustreplyempty[] = "vMustReplyEmpty"; | |
4111 | ||
4112 | putpkt (v_mustreplyempty); | |
4113 | getpkt (&rs->buf, &rs->buf_size, 0); | |
4114 | if (strcmp (rs->buf, "OK") == 0) | |
4115 | remote_protocol_packets[PACKET_vFile_setfs].support = PACKET_DISABLE; | |
4116 | else if (strcmp (rs->buf, "") != 0) | |
4117 | error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty, | |
4118 | rs->buf); | |
4119 | } | |
4120 | ||
4121 | /* Next, we possibly activate noack mode. | |
4122 | ||
4123 | If the QStartNoAckMode packet configuration is set to AUTO, | |
4124 | enable noack mode if the stub reported a wish for it with | |
4125 | qSupported. | |
4126 | ||
4127 | If set to TRUE, then enable noack mode even if the stub didn't | |
4128 | report it in qSupported. If the stub doesn't reply OK, the | |
4129 | session ends with an error. | |
4130 | ||
4131 | If FALSE, then don't activate noack mode, regardless of what the | |
4132 | stub claimed should be the default with qSupported. */ | |
4133 | ||
4134 | noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode]; | |
4135 | if (packet_config_support (noack_config) != PACKET_DISABLE) | |
4136 | { | |
4137 | putpkt ("QStartNoAckMode"); | |
4138 | getpkt (&rs->buf, &rs->buf_size, 0); | |
4139 | if (packet_ok (rs->buf, noack_config) == PACKET_OK) | |
4140 | rs->noack_mode = 1; | |
4141 | } | |
4142 | ||
4143 | if (extended_p) | |
4144 | { | |
4145 | /* Tell the remote that we are using the extended protocol. */ | |
4146 | putpkt ("!"); | |
4147 | getpkt (&rs->buf, &rs->buf_size, 0); | |
4148 | } | |
4149 | ||
4150 | /* Let the target know which signals it is allowed to pass down to | |
4151 | the program. */ | |
4152 | update_signals_program_target (); | |
4153 | ||
4154 | /* Next, if the target can specify a description, read it. We do | |
4155 | this before anything involving memory or registers. */ | |
4156 | target_find_description (); | |
4157 | ||
4158 | /* Next, now that we know something about the target, update the | |
4159 | address spaces in the program spaces. */ | |
4160 | update_address_spaces (); | |
4161 | ||
4162 | /* On OSs where the list of libraries is global to all | |
4163 | processes, we fetch them early. */ | |
4164 | if (gdbarch_has_global_solist (target_gdbarch ())) | |
4165 | solib_add (NULL, from_tty, auto_solib_add); | |
4166 | ||
4167 | if (target_is_non_stop_p ()) | |
4168 | { | |
4169 | if (packet_support (PACKET_QNonStop) != PACKET_ENABLE) | |
4170 | error (_("Non-stop mode requested, but remote " | |
4171 | "does not support non-stop")); | |
4172 | ||
4173 | putpkt ("QNonStop:1"); | |
4174 | getpkt (&rs->buf, &rs->buf_size, 0); | |
4175 | ||
4176 | if (strcmp (rs->buf, "OK") != 0) | |
4177 | error (_("Remote refused setting non-stop mode with: %s"), rs->buf); | |
4178 | ||
4179 | /* Find about threads and processes the stub is already | |
4180 | controlling. We default to adding them in the running state. | |
4181 | The '?' query below will then tell us about which threads are | |
4182 | stopped. */ | |
4183 | remote_update_thread_list (target); | |
4184 | } | |
4185 | else if (packet_support (PACKET_QNonStop) == PACKET_ENABLE) | |
4186 | { | |
4187 | /* Don't assume that the stub can operate in all-stop mode. | |
4188 | Request it explicitly. */ | |
4189 | putpkt ("QNonStop:0"); | |
4190 | getpkt (&rs->buf, &rs->buf_size, 0); | |
4191 | ||
4192 | if (strcmp (rs->buf, "OK") != 0) | |
4193 | error (_("Remote refused setting all-stop mode with: %s"), rs->buf); | |
4194 | } | |
4195 | ||
4196 | /* Upload TSVs regardless of whether the target is running or not. The | |
4197 | remote stub, such as GDBserver, may have some predefined or builtin | |
4198 | TSVs, even if the target is not running. */ | |
4199 | if (remote_get_trace_status (target, current_trace_status ()) != -1) | |
4200 | { | |
4201 | struct uploaded_tsv *uploaded_tsvs = NULL; | |
4202 | ||
4203 | remote_upload_trace_state_variables (target, &uploaded_tsvs); | |
4204 | merge_uploaded_trace_state_variables (&uploaded_tsvs); | |
4205 | } | |
4206 | ||
4207 | /* Check whether the target is running now. */ | |
4208 | putpkt ("?"); | |
4209 | getpkt (&rs->buf, &rs->buf_size, 0); | |
4210 | ||
4211 | if (!target_is_non_stop_p ()) | |
4212 | { | |
4213 | if (rs->buf[0] == 'W' || rs->buf[0] == 'X') | |
4214 | { | |
4215 | if (!extended_p) | |
4216 | error (_("The target is not running (try extended-remote?)")); | |
4217 | ||
4218 | /* We're connected, but not running. Drop out before we | |
4219 | call start_remote. */ | |
4220 | rs->starting_up = 0; | |
4221 | return; | |
4222 | } | |
4223 | else | |
4224 | { | |
4225 | /* Save the reply for later. */ | |
4226 | wait_status = (char *) alloca (strlen (rs->buf) + 1); | |
4227 | strcpy (wait_status, rs->buf); | |
4228 | } | |
4229 | ||
4230 | /* Fetch thread list. */ | |
4231 | target_update_thread_list (); | |
4232 | ||
4233 | /* Let the stub know that we want it to return the thread. */ | |
4234 | set_continue_thread (minus_one_ptid); | |
4235 | ||
4236 | if (thread_count () == 0) | |
4237 | { | |
4238 | /* Target has no concept of threads at all. GDB treats | |
4239 | non-threaded target as single-threaded; add a main | |
4240 | thread. */ | |
4241 | add_current_inferior_and_thread (wait_status); | |
4242 | } | |
4243 | else | |
4244 | { | |
4245 | /* We have thread information; select the thread the target | |
4246 | says should be current. If we're reconnecting to a | |
4247 | multi-threaded program, this will ideally be the thread | |
4248 | that last reported an event before GDB disconnected. */ | |
4249 | inferior_ptid = get_current_thread (wait_status); | |
4250 | if (ptid_equal (inferior_ptid, null_ptid)) | |
4251 | { | |
4252 | /* Odd... The target was able to list threads, but not | |
4253 | tell us which thread was current (no "thread" | |
4254 | register in T stop reply?). Just pick the first | |
4255 | thread in the thread list then. */ | |
4256 | ||
4257 | if (remote_debug) | |
4258 | fprintf_unfiltered (gdb_stdlog, | |
4259 | "warning: couldn't determine remote " | |
4260 | "current thread; picking first in list.\n"); | |
4261 | ||
4262 | inferior_ptid = thread_list->ptid; | |
4263 | } | |
4264 | } | |
4265 | ||
4266 | /* init_wait_for_inferior should be called before get_offsets in order | |
4267 | to manage `inserted' flag in bp loc in a correct state. | |
4268 | breakpoint_init_inferior, called from init_wait_for_inferior, set | |
4269 | `inserted' flag to 0, while before breakpoint_re_set, called from | |
4270 | start_remote, set `inserted' flag to 1. In the initialization of | |
4271 | inferior, breakpoint_init_inferior should be called first, and then | |
4272 | breakpoint_re_set can be called. If this order is broken, state of | |
4273 | `inserted' flag is wrong, and cause some problems on breakpoint | |
4274 | manipulation. */ | |
4275 | init_wait_for_inferior (); | |
4276 | ||
4277 | get_offsets (); /* Get text, data & bss offsets. */ | |
4278 | ||
4279 | /* If we could not find a description using qXfer, and we know | |
4280 | how to do it some other way, try again. This is not | |
4281 | supported for non-stop; it could be, but it is tricky if | |
4282 | there are no stopped threads when we connect. */ | |
4283 | if (remote_read_description_p (target) | |
4284 | && gdbarch_target_desc (target_gdbarch ()) == NULL) | |
4285 | { | |
4286 | target_clear_description (); | |
4287 | target_find_description (); | |
4288 | } | |
4289 | ||
4290 | /* Use the previously fetched status. */ | |
4291 | gdb_assert (wait_status != NULL); | |
4292 | strcpy (rs->buf, wait_status); | |
4293 | rs->cached_wait_status = 1; | |
4294 | ||
4295 | start_remote (from_tty); /* Initialize gdb process mechanisms. */ | |
4296 | } | |
4297 | else | |
4298 | { | |
4299 | /* Clear WFI global state. Do this before finding about new | |
4300 | threads and inferiors, and setting the current inferior. | |
4301 | Otherwise we would clear the proceed status of the current | |
4302 | inferior when we want its stop_soon state to be preserved | |
4303 | (see notice_new_inferior). */ | |
4304 | init_wait_for_inferior (); | |
4305 | ||
4306 | /* In non-stop, we will either get an "OK", meaning that there | |
4307 | are no stopped threads at this time; or, a regular stop | |
4308 | reply. In the latter case, there may be more than one thread | |
4309 | stopped --- we pull them all out using the vStopped | |
4310 | mechanism. */ | |
4311 | if (strcmp (rs->buf, "OK") != 0) | |
4312 | { | |
4313 | struct notif_client *notif = ¬if_client_stop; | |
4314 | ||
4315 | /* remote_notif_get_pending_replies acks this one, and gets | |
4316 | the rest out. */ | |
4317 | rs->notif_state->pending_event[notif_client_stop.id] | |
4318 | = remote_notif_parse (notif, rs->buf); | |
4319 | remote_notif_get_pending_events (notif); | |
4320 | } | |
4321 | ||
4322 | if (thread_count () == 0) | |
4323 | { | |
4324 | if (!extended_p) | |
4325 | error (_("The target is not running (try extended-remote?)")); | |
4326 | ||
4327 | /* We're connected, but not running. Drop out before we | |
4328 | call start_remote. */ | |
4329 | rs->starting_up = 0; | |
4330 | return; | |
4331 | } | |
4332 | ||
4333 | /* In non-stop mode, any cached wait status will be stored in | |
4334 | the stop reply queue. */ | |
4335 | gdb_assert (wait_status == NULL); | |
4336 | ||
4337 | /* Report all signals during attach/startup. */ | |
4338 | remote_pass_signals (target, 0, NULL); | |
4339 | ||
4340 | /* If there are already stopped threads, mark them stopped and | |
4341 | report their stops before giving the prompt to the user. */ | |
4342 | process_initial_stop_replies (from_tty); | |
4343 | ||
4344 | if (target_can_async_p ()) | |
4345 | target_async (1); | |
4346 | } | |
4347 | ||
4348 | /* If we connected to a live target, do some additional setup. */ | |
4349 | if (target_has_execution) | |
4350 | { | |
4351 | if (symfile_objfile) /* No use without a symbol-file. */ | |
4352 | remote_check_symbols (); | |
4353 | } | |
4354 | ||
4355 | /* Possibly the target has been engaged in a trace run started | |
4356 | previously; find out where things are at. */ | |
4357 | if (remote_get_trace_status (target, current_trace_status ()) != -1) | |
4358 | { | |
4359 | struct uploaded_tp *uploaded_tps = NULL; | |
4360 | ||
4361 | if (current_trace_status ()->running) | |
4362 | printf_filtered (_("Trace is already running on the target.\n")); | |
4363 | ||
4364 | remote_upload_tracepoints (target, &uploaded_tps); | |
4365 | ||
4366 | merge_uploaded_tracepoints (&uploaded_tps); | |
4367 | } | |
4368 | ||
4369 | /* Possibly the target has been engaged in a btrace record started | |
4370 | previously; find out where things are at. */ | |
4371 | remote_btrace_maybe_reopen (); | |
4372 | ||
4373 | /* The thread and inferior lists are now synchronized with the | |
4374 | target, our symbols have been relocated, and we're merged the | |
4375 | target's tracepoints with ours. We're done with basic start | |
4376 | up. */ | |
4377 | rs->starting_up = 0; | |
4378 | ||
4379 | /* Maybe breakpoints are global and need to be inserted now. */ | |
4380 | if (breakpoints_should_be_inserted_now ()) | |
4381 | insert_breakpoints (); | |
4382 | } | |
4383 | ||
4384 | /* Open a connection to a remote debugger. | |
4385 | NAME is the filename used for communication. */ | |
4386 | ||
4387 | static void | |
4388 | remote_open (const char *name, int from_tty) | |
4389 | { | |
4390 | remote_open_1 (name, from_tty, &remote_ops, 0); | |
4391 | } | |
4392 | ||
4393 | /* Open a connection to a remote debugger using the extended | |
4394 | remote gdb protocol. NAME is the filename used for communication. */ | |
4395 | ||
4396 | static void | |
4397 | extended_remote_open (const char *name, int from_tty) | |
4398 | { | |
4399 | remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */); | |
4400 | } | |
4401 | ||
4402 | /* Reset all packets back to "unknown support". Called when opening a | |
4403 | new connection to a remote target. */ | |
4404 | ||
4405 | static void | |
4406 | reset_all_packet_configs_support (void) | |
4407 | { | |
4408 | int i; | |
4409 | ||
4410 | for (i = 0; i < PACKET_MAX; i++) | |
4411 | remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN; | |
4412 | } | |
4413 | ||
4414 | /* Initialize all packet configs. */ | |
4415 | ||
4416 | static void | |
4417 | init_all_packet_configs (void) | |
4418 | { | |
4419 | int i; | |
4420 | ||
4421 | for (i = 0; i < PACKET_MAX; i++) | |
4422 | { | |
4423 | remote_protocol_packets[i].detect = AUTO_BOOLEAN_AUTO; | |
4424 | remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN; | |
4425 | } | |
4426 | } | |
4427 | ||
4428 | /* Symbol look-up. */ | |
4429 | ||
4430 | static void | |
4431 | remote_check_symbols (void) | |
4432 | { | |
4433 | struct remote_state *rs = get_remote_state (); | |
4434 | char *msg, *reply, *tmp; | |
4435 | int end; | |
4436 | long reply_size; | |
4437 | struct cleanup *old_chain; | |
4438 | ||
4439 | /* The remote side has no concept of inferiors that aren't running | |
4440 | yet, it only knows about running processes. If we're connected | |
4441 | but our current inferior is not running, we should not invite the | |
4442 | remote target to request symbol lookups related to its | |
4443 | (unrelated) current process. */ | |
4444 | if (!target_has_execution) | |
4445 | return; | |
4446 | ||
4447 | if (packet_support (PACKET_qSymbol) == PACKET_DISABLE) | |
4448 | return; | |
4449 | ||
4450 | /* Make sure the remote is pointing at the right process. Note | |
4451 | there's no way to select "no process". */ | |
4452 | set_general_process (); | |
4453 | ||
4454 | /* Allocate a message buffer. We can't reuse the input buffer in RS, | |
4455 | because we need both at the same time. */ | |
4456 | msg = (char *) xmalloc (get_remote_packet_size ()); | |
4457 | old_chain = make_cleanup (xfree, msg); | |
4458 | reply = (char *) xmalloc (get_remote_packet_size ()); | |
4459 | make_cleanup (free_current_contents, &reply); | |
4460 | reply_size = get_remote_packet_size (); | |
4461 | ||
4462 | /* Invite target to request symbol lookups. */ | |
4463 | ||
4464 | putpkt ("qSymbol::"); | |
4465 | getpkt (&reply, &reply_size, 0); | |
4466 | packet_ok (reply, &remote_protocol_packets[PACKET_qSymbol]); | |
4467 | ||
4468 | while (startswith (reply, "qSymbol:")) | |
4469 | { | |
4470 | struct bound_minimal_symbol sym; | |
4471 | ||
4472 | tmp = &reply[8]; | |
4473 | end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2); | |
4474 | msg[end] = '\0'; | |
4475 | sym = lookup_minimal_symbol (msg, NULL, NULL); | |
4476 | if (sym.minsym == NULL) | |
4477 | xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]); | |
4478 | else | |
4479 | { | |
4480 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; | |
4481 | CORE_ADDR sym_addr = BMSYMBOL_VALUE_ADDRESS (sym); | |
4482 | ||
4483 | /* If this is a function address, return the start of code | |
4484 | instead of any data function descriptor. */ | |
4485 | sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch (), | |
4486 | sym_addr, | |
4487 | ¤t_target); | |
4488 | ||
4489 | xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s", | |
4490 | phex_nz (sym_addr, addr_size), &reply[8]); | |
4491 | } | |
4492 | ||
4493 | putpkt (msg); | |
4494 | getpkt (&reply, &reply_size, 0); | |
4495 | } | |
4496 | ||
4497 | do_cleanups (old_chain); | |
4498 | } | |
4499 | ||
4500 | static struct serial * | |
4501 | remote_serial_open (const char *name) | |
4502 | { | |
4503 | static int udp_warning = 0; | |
4504 | ||
4505 | /* FIXME: Parsing NAME here is a hack. But we want to warn here instead | |
4506 | of in ser-tcp.c, because it is the remote protocol assuming that the | |
4507 | serial connection is reliable and not the serial connection promising | |
4508 | to be. */ | |
4509 | if (!udp_warning && startswith (name, "udp:")) | |
4510 | { | |
4511 | warning (_("The remote protocol may be unreliable over UDP.\n" | |
4512 | "Some events may be lost, rendering further debugging " | |
4513 | "impossible.")); | |
4514 | udp_warning = 1; | |
4515 | } | |
4516 | ||
4517 | return serial_open (name); | |
4518 | } | |
4519 | ||
4520 | /* Inform the target of our permission settings. The permission flags | |
4521 | work without this, but if the target knows the settings, it can do | |
4522 | a couple things. First, it can add its own check, to catch cases | |
4523 | that somehow manage to get by the permissions checks in target | |
4524 | methods. Second, if the target is wired to disallow particular | |
4525 | settings (for instance, a system in the field that is not set up to | |
4526 | be able to stop at a breakpoint), it can object to any unavailable | |
4527 | permissions. */ | |
4528 | ||
4529 | void | |
4530 | remote_set_permissions (struct target_ops *self) | |
4531 | { | |
4532 | struct remote_state *rs = get_remote_state (); | |
4533 | ||
4534 | xsnprintf (rs->buf, get_remote_packet_size (), "QAllow:" | |
4535 | "WriteReg:%x;WriteMem:%x;" | |
4536 | "InsertBreak:%x;InsertTrace:%x;" | |
4537 | "InsertFastTrace:%x;Stop:%x", | |
4538 | may_write_registers, may_write_memory, | |
4539 | may_insert_breakpoints, may_insert_tracepoints, | |
4540 | may_insert_fast_tracepoints, may_stop); | |
4541 | putpkt (rs->buf); | |
4542 | getpkt (&rs->buf, &rs->buf_size, 0); | |
4543 | ||
4544 | /* If the target didn't like the packet, warn the user. Do not try | |
4545 | to undo the user's settings, that would just be maddening. */ | |
4546 | if (strcmp (rs->buf, "OK") != 0) | |
4547 | warning (_("Remote refused setting permissions with: %s"), rs->buf); | |
4548 | } | |
4549 | ||
4550 | /* This type describes each known response to the qSupported | |
4551 | packet. */ | |
4552 | struct protocol_feature | |
4553 | { | |
4554 | /* The name of this protocol feature. */ | |
4555 | const char *name; | |
4556 | ||
4557 | /* The default for this protocol feature. */ | |
4558 | enum packet_support default_support; | |
4559 | ||
4560 | /* The function to call when this feature is reported, or after | |
4561 | qSupported processing if the feature is not supported. | |
4562 | The first argument points to this structure. The second | |
4563 | argument indicates whether the packet requested support be | |
4564 | enabled, disabled, or probed (or the default, if this function | |
4565 | is being called at the end of processing and this feature was | |
4566 | not reported). The third argument may be NULL; if not NULL, it | |
4567 | is a NUL-terminated string taken from the packet following | |
4568 | this feature's name and an equals sign. */ | |
4569 | void (*func) (const struct protocol_feature *, enum packet_support, | |
4570 | const char *); | |
4571 | ||
4572 | /* The corresponding packet for this feature. Only used if | |
4573 | FUNC is remote_supported_packet. */ | |
4574 | int packet; | |
4575 | }; | |
4576 | ||
4577 | static void | |
4578 | remote_supported_packet (const struct protocol_feature *feature, | |
4579 | enum packet_support support, | |
4580 | const char *argument) | |
4581 | { | |
4582 | if (argument) | |
4583 | { | |
4584 | warning (_("Remote qSupported response supplied an unexpected value for" | |
4585 | " \"%s\"."), feature->name); | |
4586 | return; | |
4587 | } | |
4588 | ||
4589 | remote_protocol_packets[feature->packet].support = support; | |
4590 | } | |
4591 | ||
4592 | static void | |
4593 | remote_packet_size (const struct protocol_feature *feature, | |
4594 | enum packet_support support, const char *value) | |
4595 | { | |
4596 | struct remote_state *rs = get_remote_state (); | |
4597 | ||
4598 | int packet_size; | |
4599 | char *value_end; | |
4600 | ||
4601 | if (support != PACKET_ENABLE) | |
4602 | return; | |
4603 | ||
4604 | if (value == NULL || *value == '\0') | |
4605 | { | |
4606 | warning (_("Remote target reported \"%s\" without a size."), | |
4607 | feature->name); | |
4608 | return; | |
4609 | } | |
4610 | ||
4611 | errno = 0; | |
4612 | packet_size = strtol (value, &value_end, 16); | |
4613 | if (errno != 0 || *value_end != '\0' || packet_size < 0) | |
4614 | { | |
4615 | warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."), | |
4616 | feature->name, value); | |
4617 | return; | |
4618 | } | |
4619 | ||
4620 | /* Record the new maximum packet size. */ | |
4621 | rs->explicit_packet_size = packet_size; | |
4622 | } | |
4623 | ||
4624 | static const struct protocol_feature remote_protocol_features[] = { | |
4625 | { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 }, | |
4626 | { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet, | |
4627 | PACKET_qXfer_auxv }, | |
4628 | { "qXfer:exec-file:read", PACKET_DISABLE, remote_supported_packet, | |
4629 | PACKET_qXfer_exec_file }, | |
4630 | { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet, | |
4631 | PACKET_qXfer_features }, | |
4632 | { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet, | |
4633 | PACKET_qXfer_libraries }, | |
4634 | { "qXfer:libraries-svr4:read", PACKET_DISABLE, remote_supported_packet, | |
4635 | PACKET_qXfer_libraries_svr4 }, | |
4636 | { "augmented-libraries-svr4-read", PACKET_DISABLE, | |
4637 | remote_supported_packet, PACKET_augmented_libraries_svr4_read_feature }, | |
4638 | { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet, | |
4639 | PACKET_qXfer_memory_map }, | |
4640 | { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet, | |
4641 | PACKET_qXfer_spu_read }, | |
4642 | { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet, | |
4643 | PACKET_qXfer_spu_write }, | |
4644 | { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet, | |
4645 | PACKET_qXfer_osdata }, | |
4646 | { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet, | |
4647 | PACKET_qXfer_threads }, | |
4648 | { "qXfer:traceframe-info:read", PACKET_DISABLE, remote_supported_packet, | |
4649 | PACKET_qXfer_traceframe_info }, | |
4650 | { "QPassSignals", PACKET_DISABLE, remote_supported_packet, | |
4651 | PACKET_QPassSignals }, | |
4652 | { "QCatchSyscalls", PACKET_DISABLE, remote_supported_packet, | |
4653 | PACKET_QCatchSyscalls }, | |
4654 | { "QProgramSignals", PACKET_DISABLE, remote_supported_packet, | |
4655 | PACKET_QProgramSignals }, | |
4656 | { "QSetWorkingDir", PACKET_DISABLE, remote_supported_packet, | |
4657 | PACKET_QSetWorkingDir }, | |
4658 | { "QStartupWithShell", PACKET_DISABLE, remote_supported_packet, | |
4659 | PACKET_QStartupWithShell }, | |
4660 | { "QEnvironmentHexEncoded", PACKET_DISABLE, remote_supported_packet, | |
4661 | PACKET_QEnvironmentHexEncoded }, | |
4662 | { "QEnvironmentReset", PACKET_DISABLE, remote_supported_packet, | |
4663 | PACKET_QEnvironmentReset }, | |
4664 | { "QEnvironmentUnset", PACKET_DISABLE, remote_supported_packet, | |
4665 | PACKET_QEnvironmentUnset }, | |
4666 | { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet, | |
4667 | PACKET_QStartNoAckMode }, | |
4668 | { "multiprocess", PACKET_DISABLE, remote_supported_packet, | |
4669 | PACKET_multiprocess_feature }, | |
4670 | { "QNonStop", PACKET_DISABLE, remote_supported_packet, PACKET_QNonStop }, | |
4671 | { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet, | |
4672 | PACKET_qXfer_siginfo_read }, | |
4673 | { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet, | |
4674 | PACKET_qXfer_siginfo_write }, | |
4675 | { "ConditionalTracepoints", PACKET_DISABLE, remote_supported_packet, | |
4676 | PACKET_ConditionalTracepoints }, | |
4677 | { "ConditionalBreakpoints", PACKET_DISABLE, remote_supported_packet, | |
4678 | PACKET_ConditionalBreakpoints }, | |
4679 | { "BreakpointCommands", PACKET_DISABLE, remote_supported_packet, | |
4680 | PACKET_BreakpointCommands }, | |
4681 | { "FastTracepoints", PACKET_DISABLE, remote_supported_packet, | |
4682 | PACKET_FastTracepoints }, | |
4683 | { "StaticTracepoints", PACKET_DISABLE, remote_supported_packet, | |
4684 | PACKET_StaticTracepoints }, | |
4685 | {"InstallInTrace", PACKET_DISABLE, remote_supported_packet, | |
4686 | PACKET_InstallInTrace}, | |
4687 | { "DisconnectedTracing", PACKET_DISABLE, remote_supported_packet, | |
4688 | PACKET_DisconnectedTracing_feature }, | |
4689 | { "ReverseContinue", PACKET_DISABLE, remote_supported_packet, | |
4690 | PACKET_bc }, | |
4691 | { "ReverseStep", PACKET_DISABLE, remote_supported_packet, | |
4692 | PACKET_bs }, | |
4693 | { "TracepointSource", PACKET_DISABLE, remote_supported_packet, | |
4694 | PACKET_TracepointSource }, | |
4695 | { "QAllow", PACKET_DISABLE, remote_supported_packet, | |
4696 | PACKET_QAllow }, | |
4697 | { "EnableDisableTracepoints", PACKET_DISABLE, remote_supported_packet, | |
4698 | PACKET_EnableDisableTracepoints_feature }, | |
4699 | { "qXfer:fdpic:read", PACKET_DISABLE, remote_supported_packet, | |
4700 | PACKET_qXfer_fdpic }, | |
4701 | { "qXfer:uib:read", PACKET_DISABLE, remote_supported_packet, | |
4702 | PACKET_qXfer_uib }, | |
4703 | { "QDisableRandomization", PACKET_DISABLE, remote_supported_packet, | |
4704 | PACKET_QDisableRandomization }, | |
4705 | { "QAgent", PACKET_DISABLE, remote_supported_packet, PACKET_QAgent}, | |
4706 | { "QTBuffer:size", PACKET_DISABLE, | |
4707 | remote_supported_packet, PACKET_QTBuffer_size}, | |
4708 | { "tracenz", PACKET_DISABLE, remote_supported_packet, PACKET_tracenz_feature }, | |
4709 | { "Qbtrace:off", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_off }, | |
4710 | { "Qbtrace:bts", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_bts }, | |
4711 | { "Qbtrace:pt", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_pt }, | |
4712 | { "qXfer:btrace:read", PACKET_DISABLE, remote_supported_packet, | |
4713 | PACKET_qXfer_btrace }, | |
4714 | { "qXfer:btrace-conf:read", PACKET_DISABLE, remote_supported_packet, | |
4715 | PACKET_qXfer_btrace_conf }, | |
4716 | { "Qbtrace-conf:bts:size", PACKET_DISABLE, remote_supported_packet, | |
4717 | PACKET_Qbtrace_conf_bts_size }, | |
4718 | { "swbreak", PACKET_DISABLE, remote_supported_packet, PACKET_swbreak_feature }, | |
4719 | { "hwbreak", PACKET_DISABLE, remote_supported_packet, PACKET_hwbreak_feature }, | |
4720 | { "fork-events", PACKET_DISABLE, remote_supported_packet, | |
4721 | PACKET_fork_event_feature }, | |
4722 | { "vfork-events", PACKET_DISABLE, remote_supported_packet, | |
4723 | PACKET_vfork_event_feature }, | |
4724 | { "exec-events", PACKET_DISABLE, remote_supported_packet, | |
4725 | PACKET_exec_event_feature }, | |
4726 | { "Qbtrace-conf:pt:size", PACKET_DISABLE, remote_supported_packet, | |
4727 | PACKET_Qbtrace_conf_pt_size }, | |
4728 | { "vContSupported", PACKET_DISABLE, remote_supported_packet, PACKET_vContSupported }, | |
4729 | { "QThreadEvents", PACKET_DISABLE, remote_supported_packet, PACKET_QThreadEvents }, | |
4730 | { "no-resumed", PACKET_DISABLE, remote_supported_packet, PACKET_no_resumed }, | |
4731 | }; | |
4732 | ||
4733 | static char *remote_support_xml; | |
4734 | ||
4735 | /* Register string appended to "xmlRegisters=" in qSupported query. */ | |
4736 | ||
4737 | void | |
4738 | register_remote_support_xml (const char *xml) | |
4739 | { | |
4740 | #if defined(HAVE_LIBEXPAT) | |
4741 | if (remote_support_xml == NULL) | |
4742 | remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL); | |
4743 | else | |
4744 | { | |
4745 | char *copy = xstrdup (remote_support_xml + 13); | |
4746 | char *p = strtok (copy, ","); | |
4747 | ||
4748 | do | |
4749 | { | |
4750 | if (strcmp (p, xml) == 0) | |
4751 | { | |
4752 | /* already there */ | |
4753 | xfree (copy); | |
4754 | return; | |
4755 | } | |
4756 | } | |
4757 | while ((p = strtok (NULL, ",")) != NULL); | |
4758 | xfree (copy); | |
4759 | ||
4760 | remote_support_xml = reconcat (remote_support_xml, | |
4761 | remote_support_xml, ",", xml, | |
4762 | (char *) NULL); | |
4763 | } | |
4764 | #endif | |
4765 | } | |
4766 | ||
4767 | static char * | |
4768 | remote_query_supported_append (char *msg, const char *append) | |
4769 | { | |
4770 | if (msg) | |
4771 | return reconcat (msg, msg, ";", append, (char *) NULL); | |
4772 | else | |
4773 | return xstrdup (append); | |
4774 | } | |
4775 | ||
4776 | static void | |
4777 | remote_query_supported (void) | |
4778 | { | |
4779 | struct remote_state *rs = get_remote_state (); | |
4780 | char *next; | |
4781 | int i; | |
4782 | unsigned char seen [ARRAY_SIZE (remote_protocol_features)]; | |
4783 | ||
4784 | /* The packet support flags are handled differently for this packet | |
4785 | than for most others. We treat an error, a disabled packet, and | |
4786 | an empty response identically: any features which must be reported | |
4787 | to be used will be automatically disabled. An empty buffer | |
4788 | accomplishes this, since that is also the representation for a list | |
4789 | containing no features. */ | |
4790 | ||
4791 | rs->buf[0] = 0; | |
4792 | if (packet_support (PACKET_qSupported) != PACKET_DISABLE) | |
4793 | { | |
4794 | char *q = NULL; | |
4795 | struct cleanup *old_chain = make_cleanup (free_current_contents, &q); | |
4796 | ||
4797 | if (packet_set_cmd_state (PACKET_multiprocess_feature) != AUTO_BOOLEAN_FALSE) | |
4798 | q = remote_query_supported_append (q, "multiprocess+"); | |
4799 | ||
4800 | if (packet_set_cmd_state (PACKET_swbreak_feature) != AUTO_BOOLEAN_FALSE) | |
4801 | q = remote_query_supported_append (q, "swbreak+"); | |
4802 | if (packet_set_cmd_state (PACKET_hwbreak_feature) != AUTO_BOOLEAN_FALSE) | |
4803 | q = remote_query_supported_append (q, "hwbreak+"); | |
4804 | ||
4805 | q = remote_query_supported_append (q, "qRelocInsn+"); | |
4806 | ||
4807 | if (packet_set_cmd_state (PACKET_fork_event_feature) | |
4808 | != AUTO_BOOLEAN_FALSE) | |
4809 | q = remote_query_supported_append (q, "fork-events+"); | |
4810 | if (packet_set_cmd_state (PACKET_vfork_event_feature) | |
4811 | != AUTO_BOOLEAN_FALSE) | |
4812 | q = remote_query_supported_append (q, "vfork-events+"); | |
4813 | if (packet_set_cmd_state (PACKET_exec_event_feature) | |
4814 | != AUTO_BOOLEAN_FALSE) | |
4815 | q = remote_query_supported_append (q, "exec-events+"); | |
4816 | ||
4817 | if (packet_set_cmd_state (PACKET_vContSupported) != AUTO_BOOLEAN_FALSE) | |
4818 | q = remote_query_supported_append (q, "vContSupported+"); | |
4819 | ||
4820 | if (packet_set_cmd_state (PACKET_QThreadEvents) != AUTO_BOOLEAN_FALSE) | |
4821 | q = remote_query_supported_append (q, "QThreadEvents+"); | |
4822 | ||
4823 | if (packet_set_cmd_state (PACKET_no_resumed) != AUTO_BOOLEAN_FALSE) | |
4824 | q = remote_query_supported_append (q, "no-resumed+"); | |
4825 | ||
4826 | /* Keep this one last to work around a gdbserver <= 7.10 bug in | |
4827 | the qSupported:xmlRegisters=i386 handling. */ | |
4828 | if (remote_support_xml != NULL) | |
4829 | q = remote_query_supported_append (q, remote_support_xml); | |
4830 | ||
4831 | q = reconcat (q, "qSupported:", q, (char *) NULL); | |
4832 | putpkt (q); | |
4833 | ||
4834 | do_cleanups (old_chain); | |
4835 | ||
4836 | getpkt (&rs->buf, &rs->buf_size, 0); | |
4837 | ||
4838 | /* If an error occured, warn, but do not return - just reset the | |
4839 | buffer to empty and go on to disable features. */ | |
4840 | if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported]) | |
4841 | == PACKET_ERROR) | |
4842 | { | |
4843 | warning (_("Remote failure reply: %s"), rs->buf); | |
4844 | rs->buf[0] = 0; | |
4845 | } | |
4846 | } | |
4847 | ||
4848 | memset (seen, 0, sizeof (seen)); | |
4849 | ||
4850 | next = rs->buf; | |
4851 | while (*next) | |
4852 | { | |
4853 | enum packet_support is_supported; | |
4854 | char *p, *end, *name_end, *value; | |
4855 | ||
4856 | /* First separate out this item from the rest of the packet. If | |
4857 | there's another item after this, we overwrite the separator | |
4858 | (terminated strings are much easier to work with). */ | |
4859 | p = next; | |
4860 | end = strchr (p, ';'); | |
4861 | if (end == NULL) | |
4862 | { | |
4863 | end = p + strlen (p); | |
4864 | next = end; | |
4865 | } | |
4866 | else | |
4867 | { | |
4868 | *end = '\0'; | |
4869 | next = end + 1; | |
4870 | ||
4871 | if (end == p) | |
4872 | { | |
4873 | warning (_("empty item in \"qSupported\" response")); | |
4874 | continue; | |
4875 | } | |
4876 | } | |
4877 | ||
4878 | name_end = strchr (p, '='); | |
4879 | if (name_end) | |
4880 | { | |
4881 | /* This is a name=value entry. */ | |
4882 | is_supported = PACKET_ENABLE; | |
4883 | value = name_end + 1; | |
4884 | *name_end = '\0'; | |
4885 | } | |
4886 | else | |
4887 | { | |
4888 | value = NULL; | |
4889 | switch (end[-1]) | |
4890 | { | |
4891 | case '+': | |
4892 | is_supported = PACKET_ENABLE; | |
4893 | break; | |
4894 | ||
4895 | case '-': | |
4896 | is_supported = PACKET_DISABLE; | |
4897 | break; | |
4898 | ||
4899 | case '?': | |
4900 | is_supported = PACKET_SUPPORT_UNKNOWN; | |
4901 | break; | |
4902 | ||
4903 | default: | |
4904 | warning (_("unrecognized item \"%s\" " | |
4905 | "in \"qSupported\" response"), p); | |
4906 | continue; | |
4907 | } | |
4908 | end[-1] = '\0'; | |
4909 | } | |
4910 | ||
4911 | for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++) | |
4912 | if (strcmp (remote_protocol_features[i].name, p) == 0) | |
4913 | { | |
4914 | const struct protocol_feature *feature; | |
4915 | ||
4916 | seen[i] = 1; | |
4917 | feature = &remote_protocol_features[i]; | |
4918 | feature->func (feature, is_supported, value); | |
4919 | break; | |
4920 | } | |
4921 | } | |
4922 | ||
4923 | /* If we increased the packet size, make sure to increase the global | |
4924 | buffer size also. We delay this until after parsing the entire | |
4925 | qSupported packet, because this is the same buffer we were | |
4926 | parsing. */ | |
4927 | if (rs->buf_size < rs->explicit_packet_size) | |
4928 | { | |
4929 | rs->buf_size = rs->explicit_packet_size; | |
4930 | rs->buf = (char *) xrealloc (rs->buf, rs->buf_size); | |
4931 | } | |
4932 | ||
4933 | /* Handle the defaults for unmentioned features. */ | |
4934 | for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++) | |
4935 | if (!seen[i]) | |
4936 | { | |
4937 | const struct protocol_feature *feature; | |
4938 | ||
4939 | feature = &remote_protocol_features[i]; | |
4940 | feature->func (feature, feature->default_support, NULL); | |
4941 | } | |
4942 | } | |
4943 | ||
4944 | /* Serial QUIT handler for the remote serial descriptor. | |
4945 | ||
4946 | Defers handling a Ctrl-C until we're done with the current | |
4947 | command/response packet sequence, unless: | |
4948 | ||
4949 | - We're setting up the connection. Don't send a remote interrupt | |
4950 | request, as we're not fully synced yet. Quit immediately | |
4951 | instead. | |
4952 | ||
4953 | - The target has been resumed in the foreground | |
4954 | (target_terminal::is_ours is false) with a synchronous resume | |
4955 | packet, and we're blocked waiting for the stop reply, thus a | |
4956 | Ctrl-C should be immediately sent to the target. | |
4957 | ||
4958 | - We get a second Ctrl-C while still within the same serial read or | |
4959 | write. In that case the serial is seemingly wedged --- offer to | |
4960 | quit/disconnect. | |
4961 | ||
4962 | - We see a second Ctrl-C without target response, after having | |
4963 | previously interrupted the target. In that case the target/stub | |
4964 | is probably wedged --- offer to quit/disconnect. | |
4965 | */ | |
4966 | ||
4967 | static void | |
4968 | remote_serial_quit_handler (void) | |
4969 | { | |
4970 | struct remote_state *rs = get_remote_state (); | |
4971 | ||
4972 | if (check_quit_flag ()) | |
4973 | { | |
4974 | /* If we're starting up, we're not fully synced yet. Quit | |
4975 | immediately. */ | |
4976 | if (rs->starting_up) | |
4977 | quit (); | |
4978 | else if (rs->got_ctrlc_during_io) | |
4979 | { | |
4980 | if (query (_("The target is not responding to GDB commands.\n" | |
4981 | "Stop debugging it? "))) | |
4982 | remote_unpush_and_throw (); | |
4983 | } | |
4984 | /* If ^C has already been sent once, offer to disconnect. */ | |
4985 | else if (!target_terminal::is_ours () && rs->ctrlc_pending_p) | |
4986 | interrupt_query (); | |
4987 | /* All-stop protocol, and blocked waiting for stop reply. Send | |
4988 | an interrupt request. */ | |
4989 | else if (!target_terminal::is_ours () && rs->waiting_for_stop_reply) | |
4990 | target_interrupt (inferior_ptid); | |
4991 | else | |
4992 | rs->got_ctrlc_during_io = 1; | |
4993 | } | |
4994 | } | |
4995 | ||
4996 | /* Remove any of the remote.c targets from target stack. Upper targets depend | |
4997 | on it so remove them first. */ | |
4998 | ||
4999 | static void | |
5000 | remote_unpush_target (void) | |
5001 | { | |
5002 | pop_all_targets_at_and_above (process_stratum); | |
5003 | } | |
5004 | ||
5005 | static void | |
5006 | remote_unpush_and_throw (void) | |
5007 | { | |
5008 | remote_unpush_target (); | |
5009 | throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target.")); | |
5010 | } | |
5011 | ||
5012 | static void | |
5013 | remote_open_1 (const char *name, int from_tty, | |
5014 | struct target_ops *target, int extended_p) | |
5015 | { | |
5016 | struct remote_state *rs = get_remote_state (); | |
5017 | ||
5018 | if (name == 0) | |
5019 | error (_("To open a remote debug connection, you need to specify what\n" | |
5020 | "serial device is attached to the remote system\n" | |
5021 | "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).")); | |
5022 | ||
5023 | /* See FIXME above. */ | |
5024 | if (!target_async_permitted) | |
5025 | wait_forever_enabled_p = 1; | |
5026 | ||
5027 | /* If we're connected to a running target, target_preopen will kill it. | |
5028 | Ask this question first, before target_preopen has a chance to kill | |
5029 | anything. */ | |
5030 | if (rs->remote_desc != NULL && !have_inferiors ()) | |
5031 | { | |
5032 | if (from_tty | |
5033 | && !query (_("Already connected to a remote target. Disconnect? "))) | |
5034 | error (_("Still connected.")); | |
5035 | } | |
5036 | ||
5037 | /* Here the possibly existing remote target gets unpushed. */ | |
5038 | target_preopen (from_tty); | |
5039 | ||
5040 | /* Make sure we send the passed signals list the next time we resume. */ | |
5041 | xfree (rs->last_pass_packet); | |
5042 | rs->last_pass_packet = NULL; | |
5043 | ||
5044 | /* Make sure we send the program signals list the next time we | |
5045 | resume. */ | |
5046 | xfree (rs->last_program_signals_packet); | |
5047 | rs->last_program_signals_packet = NULL; | |
5048 | ||
5049 | remote_fileio_reset (); | |
5050 | reopen_exec_file (); | |
5051 | reread_symbols (); | |
5052 | ||
5053 | rs->remote_desc = remote_serial_open (name); | |
5054 | if (!rs->remote_desc) | |
5055 | perror_with_name (name); | |
5056 | ||
5057 | if (baud_rate != -1) | |
5058 | { | |
5059 | if (serial_setbaudrate (rs->remote_desc, baud_rate)) | |
5060 | { | |
5061 | /* The requested speed could not be set. Error out to | |
5062 | top level after closing remote_desc. Take care to | |
5063 | set remote_desc to NULL to avoid closing remote_desc | |
5064 | more than once. */ | |
5065 | serial_close (rs->remote_desc); | |
5066 | rs->remote_desc = NULL; | |
5067 | perror_with_name (name); | |
5068 | } | |
5069 | } | |
5070 | ||
5071 | serial_setparity (rs->remote_desc, serial_parity); | |
5072 | serial_raw (rs->remote_desc); | |
5073 | ||
5074 | /* If there is something sitting in the buffer we might take it as a | |
5075 | response to a command, which would be bad. */ | |
5076 | serial_flush_input (rs->remote_desc); | |
5077 | ||
5078 | if (from_tty) | |
5079 | { | |
5080 | puts_filtered ("Remote debugging using "); | |
5081 | puts_filtered (name); | |
5082 | puts_filtered ("\n"); | |
5083 | } | |
5084 | push_target (target); /* Switch to using remote target now. */ | |
5085 | ||
5086 | /* Register extra event sources in the event loop. */ | |
5087 | remote_async_inferior_event_token | |
5088 | = create_async_event_handler (remote_async_inferior_event_handler, | |
5089 | NULL); | |
5090 | rs->notif_state = remote_notif_state_allocate (); | |
5091 | ||
5092 | /* Reset the target state; these things will be queried either by | |
5093 | remote_query_supported or as they are needed. */ | |
5094 | reset_all_packet_configs_support (); | |
5095 | rs->cached_wait_status = 0; | |
5096 | rs->explicit_packet_size = 0; | |
5097 | rs->noack_mode = 0; | |
5098 | rs->extended = extended_p; | |
5099 | rs->waiting_for_stop_reply = 0; | |
5100 | rs->ctrlc_pending_p = 0; | |
5101 | rs->got_ctrlc_during_io = 0; | |
5102 | ||
5103 | rs->general_thread = not_sent_ptid; | |
5104 | rs->continue_thread = not_sent_ptid; | |
5105 | rs->remote_traceframe_number = -1; | |
5106 | ||
5107 | rs->last_resume_exec_dir = EXEC_FORWARD; | |
5108 | ||
5109 | /* Probe for ability to use "ThreadInfo" query, as required. */ | |
5110 | rs->use_threadinfo_query = 1; | |
5111 | rs->use_threadextra_query = 1; | |
5112 | ||
5113 | readahead_cache_invalidate (); | |
5114 | ||
5115 | if (target_async_permitted) | |
5116 | { | |
5117 | /* FIXME: cagney/1999-09-23: During the initial connection it is | |
5118 | assumed that the target is already ready and able to respond to | |
5119 | requests. Unfortunately remote_start_remote() eventually calls | |
5120 | wait_for_inferior() with no timeout. wait_forever_enabled_p gets | |
5121 | around this. Eventually a mechanism that allows | |
5122 | wait_for_inferior() to expect/get timeouts will be | |
5123 | implemented. */ | |
5124 | wait_forever_enabled_p = 0; | |
5125 | } | |
5126 | ||
5127 | /* First delete any symbols previously loaded from shared libraries. */ | |
5128 | no_shared_libraries (NULL, 0); | |
5129 | ||
5130 | /* Start afresh. */ | |
5131 | init_thread_list (); | |
5132 | ||
5133 | /* Start the remote connection. If error() or QUIT, discard this | |
5134 | target (we'd otherwise be in an inconsistent state) and then | |
5135 | propogate the error on up the exception chain. This ensures that | |
5136 | the caller doesn't stumble along blindly assuming that the | |
5137 | function succeeded. The CLI doesn't have this problem but other | |
5138 | UI's, such as MI do. | |
5139 | ||
5140 | FIXME: cagney/2002-05-19: Instead of re-throwing the exception, | |
5141 | this function should return an error indication letting the | |
5142 | caller restore the previous state. Unfortunately the command | |
5143 | ``target remote'' is directly wired to this function making that | |
5144 | impossible. On a positive note, the CLI side of this problem has | |
5145 | been fixed - the function set_cmd_context() makes it possible for | |
5146 | all the ``target ....'' commands to share a common callback | |
5147 | function. See cli-dump.c. */ | |
5148 | { | |
5149 | ||
5150 | TRY | |
5151 | { | |
5152 | remote_start_remote (from_tty, target, extended_p); | |
5153 | } | |
5154 | CATCH (ex, RETURN_MASK_ALL) | |
5155 | { | |
5156 | /* Pop the partially set up target - unless something else did | |
5157 | already before throwing the exception. */ | |
5158 | if (rs->remote_desc != NULL) | |
5159 | remote_unpush_target (); | |
5160 | if (target_async_permitted) | |
5161 | wait_forever_enabled_p = 1; | |
5162 | throw_exception (ex); | |
5163 | } | |
5164 | END_CATCH | |
5165 | } | |
5166 | ||
5167 | remote_btrace_reset (); | |
5168 | ||
5169 | if (target_async_permitted) | |
5170 | wait_forever_enabled_p = 1; | |
5171 | } | |
5172 | ||
5173 | /* Detach the specified process. */ | |
5174 | ||
5175 | static void | |
5176 | remote_detach_pid (int pid) | |
5177 | { | |
5178 | struct remote_state *rs = get_remote_state (); | |
5179 | ||
5180 | if (remote_multi_process_p (rs)) | |
5181 | xsnprintf (rs->buf, get_remote_packet_size (), "D;%x", pid); | |
5182 | else | |
5183 | strcpy (rs->buf, "D"); | |
5184 | ||
5185 | putpkt (rs->buf); | |
5186 | getpkt (&rs->buf, &rs->buf_size, 0); | |
5187 | ||
5188 | if (rs->buf[0] == 'O' && rs->buf[1] == 'K') | |
5189 | ; | |
5190 | else if (rs->buf[0] == '\0') | |
5191 | error (_("Remote doesn't know how to detach")); | |
5192 | else | |
5193 | error (_("Can't detach process.")); | |
5194 | } | |
5195 | ||
5196 | /* This detaches a program to which we previously attached, using | |
5197 | inferior_ptid to identify the process. After this is done, GDB | |
5198 | can be used to debug some other program. We better not have left | |
5199 | any breakpoints in the target program or it'll die when it hits | |
5200 | one. */ | |
5201 | ||
5202 | static void | |
5203 | remote_detach_1 (const char *args, int from_tty) | |
5204 | { | |
5205 | int pid = ptid_get_pid (inferior_ptid); | |
5206 | struct remote_state *rs = get_remote_state (); | |
5207 | struct thread_info *tp = find_thread_ptid (inferior_ptid); | |
5208 | int is_fork_parent; | |
5209 | ||
5210 | if (args) | |
5211 | error (_("Argument given to \"detach\" when remotely debugging.")); | |
5212 | ||
5213 | if (!target_has_execution) | |
5214 | error (_("No process to detach from.")); | |
5215 | ||
5216 | target_announce_detach (from_tty); | |
5217 | ||
5218 | /* Tell the remote target to detach. */ | |
5219 | remote_detach_pid (pid); | |
5220 | ||
5221 | /* Exit only if this is the only active inferior. */ | |
5222 | if (from_tty && !rs->extended && number_of_live_inferiors () == 1) | |
5223 | puts_filtered (_("Ending remote debugging.\n")); | |
5224 | ||
5225 | /* Check to see if we are detaching a fork parent. Note that if we | |
5226 | are detaching a fork child, tp == NULL. */ | |
5227 | is_fork_parent = (tp != NULL | |
5228 | && tp->pending_follow.kind == TARGET_WAITKIND_FORKED); | |
5229 | ||
5230 | /* If doing detach-on-fork, we don't mourn, because that will delete | |
5231 | breakpoints that should be available for the followed inferior. */ | |
5232 | if (!is_fork_parent) | |
5233 | target_mourn_inferior (inferior_ptid); | |
5234 | else | |
5235 | { | |
5236 | inferior_ptid = null_ptid; | |
5237 | detach_inferior (pid); | |
5238 | } | |
5239 | } | |
5240 | ||
5241 | static void | |
5242 | remote_detach (struct target_ops *ops, const char *args, int from_tty) | |
5243 | { | |
5244 | remote_detach_1 (args, from_tty); | |
5245 | } | |
5246 | ||
5247 | static void | |
5248 | extended_remote_detach (struct target_ops *ops, const char *args, int from_tty) | |
5249 | { | |
5250 | remote_detach_1 (args, from_tty); | |
5251 | } | |
5252 | ||
5253 | /* Target follow-fork function for remote targets. On entry, and | |
5254 | at return, the current inferior is the fork parent. | |
5255 | ||
5256 | Note that although this is currently only used for extended-remote, | |
5257 | it is named remote_follow_fork in anticipation of using it for the | |
5258 | remote target as well. */ | |
5259 | ||
5260 | static int | |
5261 | remote_follow_fork (struct target_ops *ops, int follow_child, | |
5262 | int detach_fork) | |
5263 | { | |
5264 | struct remote_state *rs = get_remote_state (); | |
5265 | enum target_waitkind kind = inferior_thread ()->pending_follow.kind; | |
5266 | ||
5267 | if ((kind == TARGET_WAITKIND_FORKED && remote_fork_event_p (rs)) | |
5268 | || (kind == TARGET_WAITKIND_VFORKED && remote_vfork_event_p (rs))) | |
5269 | { | |
5270 | /* When following the parent and detaching the child, we detach | |
5271 | the child here. For the case of following the child and | |
5272 | detaching the parent, the detach is done in the target- | |
5273 | independent follow fork code in infrun.c. We can't use | |
5274 | target_detach when detaching an unfollowed child because | |
5275 | the client side doesn't know anything about the child. */ | |
5276 | if (detach_fork && !follow_child) | |
5277 | { | |
5278 | /* Detach the fork child. */ | |
5279 | ptid_t child_ptid; | |
5280 | pid_t child_pid; | |
5281 | ||
5282 | child_ptid = inferior_thread ()->pending_follow.value.related_pid; | |
5283 | child_pid = ptid_get_pid (child_ptid); | |
5284 | ||
5285 | remote_detach_pid (child_pid); | |
5286 | detach_inferior (child_pid); | |
5287 | } | |
5288 | } | |
5289 | return 0; | |
5290 | } | |
5291 | ||
5292 | /* Target follow-exec function for remote targets. Save EXECD_PATHNAME | |
5293 | in the program space of the new inferior. On entry and at return the | |
5294 | current inferior is the exec'ing inferior. INF is the new exec'd | |
5295 | inferior, which may be the same as the exec'ing inferior unless | |
5296 | follow-exec-mode is "new". */ | |
5297 | ||
5298 | static void | |
5299 | remote_follow_exec (struct target_ops *ops, | |
5300 | struct inferior *inf, char *execd_pathname) | |
5301 | { | |
5302 | /* We know that this is a target file name, so if it has the "target:" | |
5303 | prefix we strip it off before saving it in the program space. */ | |
5304 | if (is_target_filename (execd_pathname)) | |
5305 | execd_pathname += strlen (TARGET_SYSROOT_PREFIX); | |
5306 | ||
5307 | set_pspace_remote_exec_file (inf->pspace, execd_pathname); | |
5308 | } | |
5309 | ||
5310 | /* Same as remote_detach, but don't send the "D" packet; just disconnect. */ | |
5311 | ||
5312 | static void | |
5313 | remote_disconnect (struct target_ops *target, const char *args, int from_tty) | |
5314 | { | |
5315 | if (args) | |
5316 | error (_("Argument given to \"disconnect\" when remotely debugging.")); | |
5317 | ||
5318 | /* Make sure we unpush even the extended remote targets. Calling | |
5319 | target_mourn_inferior won't unpush, and remote_mourn won't | |
5320 | unpush if there is more than one inferior left. */ | |
5321 | unpush_target (target); | |
5322 | generic_mourn_inferior (); | |
5323 | ||
5324 | if (from_tty) | |
5325 | puts_filtered ("Ending remote debugging.\n"); | |
5326 | } | |
5327 | ||
5328 | /* Attach to the process specified by ARGS. If FROM_TTY is non-zero, | |
5329 | be chatty about it. */ | |
5330 | ||
5331 | static void | |
5332 | extended_remote_attach (struct target_ops *target, const char *args, | |
5333 | int from_tty) | |
5334 | { | |
5335 | struct remote_state *rs = get_remote_state (); | |
5336 | int pid; | |
5337 | char *wait_status = NULL; | |
5338 | ||
5339 | pid = parse_pid_to_attach (args); | |
5340 | ||
5341 | /* Remote PID can be freely equal to getpid, do not check it here the same | |
5342 | way as in other targets. */ | |
5343 | ||
5344 | if (packet_support (PACKET_vAttach) == PACKET_DISABLE) | |
5345 | error (_("This target does not support attaching to a process")); | |
5346 | ||
5347 | if (from_tty) | |
5348 | { | |
5349 | char *exec_file = get_exec_file (0); | |
5350 | ||
5351 | if (exec_file) | |
5352 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
5353 | target_pid_to_str (pid_to_ptid (pid))); | |
5354 | else | |
5355 | printf_unfiltered (_("Attaching to %s\n"), | |
5356 | target_pid_to_str (pid_to_ptid (pid))); | |
5357 | ||
5358 | gdb_flush (gdb_stdout); | |
5359 | } | |
5360 | ||
5361 | xsnprintf (rs->buf, get_remote_packet_size (), "vAttach;%x", pid); | |
5362 | putpkt (rs->buf); | |
5363 | getpkt (&rs->buf, &rs->buf_size, 0); | |
5364 | ||
5365 | switch (packet_ok (rs->buf, | |
5366 | &remote_protocol_packets[PACKET_vAttach])) | |
5367 | { | |
5368 | case PACKET_OK: | |
5369 | if (!target_is_non_stop_p ()) | |
5370 | { | |
5371 | /* Save the reply for later. */ | |
5372 | wait_status = (char *) alloca (strlen (rs->buf) + 1); | |
5373 | strcpy (wait_status, rs->buf); | |
5374 | } | |
5375 | else if (strcmp (rs->buf, "OK") != 0) | |
5376 | error (_("Attaching to %s failed with: %s"), | |
5377 | target_pid_to_str (pid_to_ptid (pid)), | |
5378 | rs->buf); | |
5379 | break; | |
5380 | case PACKET_UNKNOWN: | |
5381 | error (_("This target does not support attaching to a process")); | |
5382 | default: | |
5383 | error (_("Attaching to %s failed"), | |
5384 | target_pid_to_str (pid_to_ptid (pid))); | |
5385 | } | |
5386 | ||
5387 | set_current_inferior (remote_add_inferior (0, pid, 1, 0)); | |
5388 | ||
5389 | inferior_ptid = pid_to_ptid (pid); | |
5390 | ||
5391 | if (target_is_non_stop_p ()) | |
5392 | { | |
5393 | struct thread_info *thread; | |
5394 | ||
5395 | /* Get list of threads. */ | |
5396 | remote_update_thread_list (target); | |
5397 | ||
5398 | thread = first_thread_of_process (pid); | |
5399 | if (thread) | |
5400 | inferior_ptid = thread->ptid; | |
5401 | else | |
5402 | inferior_ptid = pid_to_ptid (pid); | |
5403 | ||
5404 | /* Invalidate our notion of the remote current thread. */ | |
5405 | record_currthread (rs, minus_one_ptid); | |
5406 | } | |
5407 | else | |
5408 | { | |
5409 | /* Now, if we have thread information, update inferior_ptid. */ | |
5410 | inferior_ptid = remote_current_thread (inferior_ptid); | |
5411 | ||
5412 | /* Add the main thread to the thread list. */ | |
5413 | add_thread_silent (inferior_ptid); | |
5414 | } | |
5415 | ||
5416 | /* Next, if the target can specify a description, read it. We do | |
5417 | this before anything involving memory or registers. */ | |
5418 | target_find_description (); | |
5419 | ||
5420 | if (!target_is_non_stop_p ()) | |
5421 | { | |
5422 | /* Use the previously fetched status. */ | |
5423 | gdb_assert (wait_status != NULL); | |
5424 | ||
5425 | if (target_can_async_p ()) | |
5426 | { | |
5427 | struct notif_event *reply | |
5428 | = remote_notif_parse (¬if_client_stop, wait_status); | |
5429 | ||
5430 | push_stop_reply ((struct stop_reply *) reply); | |
5431 | ||
5432 | target_async (1); | |
5433 | } | |
5434 | else | |
5435 | { | |
5436 | gdb_assert (wait_status != NULL); | |
5437 | strcpy (rs->buf, wait_status); | |
5438 | rs->cached_wait_status = 1; | |
5439 | } | |
5440 | } | |
5441 | else | |
5442 | gdb_assert (wait_status == NULL); | |
5443 | } | |
5444 | ||
5445 | /* Implementation of the to_post_attach method. */ | |
5446 | ||
5447 | static void | |
5448 | extended_remote_post_attach (struct target_ops *ops, int pid) | |
5449 | { | |
5450 | /* Get text, data & bss offsets. */ | |
5451 | get_offsets (); | |
5452 | ||
5453 | /* In certain cases GDB might not have had the chance to start | |
5454 | symbol lookup up until now. This could happen if the debugged | |
5455 | binary is not using shared libraries, the vsyscall page is not | |
5456 | present (on Linux) and the binary itself hadn't changed since the | |
5457 | debugging process was started. */ | |
5458 | if (symfile_objfile != NULL) | |
5459 | remote_check_symbols(); | |
5460 | } | |
5461 | ||
5462 | \f | |
5463 | /* Check for the availability of vCont. This function should also check | |
5464 | the response. */ | |
5465 | ||
5466 | static void | |
5467 | remote_vcont_probe (struct remote_state *rs) | |
5468 | { | |
5469 | char *buf; | |
5470 | ||
5471 | strcpy (rs->buf, "vCont?"); | |
5472 | putpkt (rs->buf); | |
5473 | getpkt (&rs->buf, &rs->buf_size, 0); | |
5474 | buf = rs->buf; | |
5475 | ||
5476 | /* Make sure that the features we assume are supported. */ | |
5477 | if (startswith (buf, "vCont")) | |
5478 | { | |
5479 | char *p = &buf[5]; | |
5480 | int support_c, support_C; | |
5481 | ||
5482 | rs->supports_vCont.s = 0; | |
5483 | rs->supports_vCont.S = 0; | |
5484 | support_c = 0; | |
5485 | support_C = 0; | |
5486 | rs->supports_vCont.t = 0; | |
5487 | rs->supports_vCont.r = 0; | |
5488 | while (p && *p == ';') | |
5489 | { | |
5490 | p++; | |
5491 | if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0)) | |
5492 | rs->supports_vCont.s = 1; | |
5493 | else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0)) | |
5494 | rs->supports_vCont.S = 1; | |
5495 | else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0)) | |
5496 | support_c = 1; | |
5497 | else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0)) | |
5498 | support_C = 1; | |
5499 | else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0)) | |
5500 | rs->supports_vCont.t = 1; | |
5501 | else if (*p == 'r' && (*(p + 1) == ';' || *(p + 1) == 0)) | |
5502 | rs->supports_vCont.r = 1; | |
5503 | ||
5504 | p = strchr (p, ';'); | |
5505 | } | |
5506 | ||
5507 | /* If c, and C are not all supported, we can't use vCont. Clearing | |
5508 | BUF will make packet_ok disable the packet. */ | |
5509 | if (!support_c || !support_C) | |
5510 | buf[0] = 0; | |
5511 | } | |
5512 | ||
5513 | packet_ok (buf, &remote_protocol_packets[PACKET_vCont]); | |
5514 | } | |
5515 | ||
5516 | /* Helper function for building "vCont" resumptions. Write a | |
5517 | resumption to P. ENDP points to one-passed-the-end of the buffer | |
5518 | we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The | |
5519 | thread to be resumed is PTID; STEP and SIGGNAL indicate whether the | |
5520 | resumed thread should be single-stepped and/or signalled. If PTID | |
5521 | equals minus_one_ptid, then all threads are resumed; if PTID | |
5522 | represents a process, then all threads of the process are resumed; | |
5523 | the thread to be stepped and/or signalled is given in the global | |
5524 | INFERIOR_PTID. */ | |
5525 | ||
5526 | static char * | |
5527 | append_resumption (char *p, char *endp, | |
5528 | ptid_t ptid, int step, enum gdb_signal siggnal) | |
5529 | { | |
5530 | struct remote_state *rs = get_remote_state (); | |
5531 | ||
5532 | if (step && siggnal != GDB_SIGNAL_0) | |
5533 | p += xsnprintf (p, endp - p, ";S%02x", siggnal); | |
5534 | else if (step | |
5535 | /* GDB is willing to range step. */ | |
5536 | && use_range_stepping | |
5537 | /* Target supports range stepping. */ | |
5538 | && rs->supports_vCont.r | |
5539 | /* We don't currently support range stepping multiple | |
5540 | threads with a wildcard (though the protocol allows it, | |
5541 | so stubs shouldn't make an active effort to forbid | |
5542 | it). */ | |
5543 | && !(remote_multi_process_p (rs) && ptid_is_pid (ptid))) | |
5544 | { | |
5545 | struct thread_info *tp; | |
5546 | ||
5547 | if (ptid_equal (ptid, minus_one_ptid)) | |
5548 | { | |
5549 | /* If we don't know about the target thread's tid, then | |
5550 | we're resuming magic_null_ptid (see caller). */ | |
5551 | tp = find_thread_ptid (magic_null_ptid); | |
5552 | } | |
5553 | else | |
5554 | tp = find_thread_ptid (ptid); | |
5555 | gdb_assert (tp != NULL); | |
5556 | ||
5557 | if (tp->control.may_range_step) | |
5558 | { | |
5559 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; | |
5560 | ||
5561 | p += xsnprintf (p, endp - p, ";r%s,%s", | |
5562 | phex_nz (tp->control.step_range_start, | |
5563 | addr_size), | |
5564 | phex_nz (tp->control.step_range_end, | |
5565 | addr_size)); | |
5566 | } | |
5567 | else | |
5568 | p += xsnprintf (p, endp - p, ";s"); | |
5569 | } | |
5570 | else if (step) | |
5571 | p += xsnprintf (p, endp - p, ";s"); | |
5572 | else if (siggnal != GDB_SIGNAL_0) | |
5573 | p += xsnprintf (p, endp - p, ";C%02x", siggnal); | |
5574 | else | |
5575 | p += xsnprintf (p, endp - p, ";c"); | |
5576 | ||
5577 | if (remote_multi_process_p (rs) && ptid_is_pid (ptid)) | |
5578 | { | |
5579 | ptid_t nptid; | |
5580 | ||
5581 | /* All (-1) threads of process. */ | |
5582 | nptid = ptid_build (ptid_get_pid (ptid), -1, 0); | |
5583 | ||
5584 | p += xsnprintf (p, endp - p, ":"); | |
5585 | p = write_ptid (p, endp, nptid); | |
5586 | } | |
5587 | else if (!ptid_equal (ptid, minus_one_ptid)) | |
5588 | { | |
5589 | p += xsnprintf (p, endp - p, ":"); | |
5590 | p = write_ptid (p, endp, ptid); | |
5591 | } | |
5592 | ||
5593 | return p; | |
5594 | } | |
5595 | ||
5596 | /* Clear the thread's private info on resume. */ | |
5597 | ||
5598 | static void | |
5599 | resume_clear_thread_private_info (struct thread_info *thread) | |
5600 | { | |
5601 | if (thread->priv != NULL) | |
5602 | { | |
5603 | thread->priv->stop_reason = TARGET_STOPPED_BY_NO_REASON; | |
5604 | thread->priv->watch_data_address = 0; | |
5605 | } | |
5606 | } | |
5607 | ||
5608 | /* Append a vCont continue-with-signal action for threads that have a | |
5609 | non-zero stop signal. */ | |
5610 | ||
5611 | static char * | |
5612 | append_pending_thread_resumptions (char *p, char *endp, ptid_t ptid) | |
5613 | { | |
5614 | struct thread_info *thread; | |
5615 | ||
5616 | ALL_NON_EXITED_THREADS (thread) | |
5617 | if (ptid_match (thread->ptid, ptid) | |
5618 | && !ptid_equal (inferior_ptid, thread->ptid) | |
5619 | && thread->suspend.stop_signal != GDB_SIGNAL_0) | |
5620 | { | |
5621 | p = append_resumption (p, endp, thread->ptid, | |
5622 | 0, thread->suspend.stop_signal); | |
5623 | thread->suspend.stop_signal = GDB_SIGNAL_0; | |
5624 | resume_clear_thread_private_info (thread); | |
5625 | } | |
5626 | ||
5627 | return p; | |
5628 | } | |
5629 | ||
5630 | /* Set the target running, using the packets that use Hc | |
5631 | (c/s/C/S). */ | |
5632 | ||
5633 | static void | |
5634 | remote_resume_with_hc (struct target_ops *ops, | |
5635 | ptid_t ptid, int step, enum gdb_signal siggnal) | |
5636 | { | |
5637 | struct remote_state *rs = get_remote_state (); | |
5638 | struct thread_info *thread; | |
5639 | char *buf; | |
5640 | ||
5641 | rs->last_sent_signal = siggnal; | |
5642 | rs->last_sent_step = step; | |
5643 | ||
5644 | /* The c/s/C/S resume packets use Hc, so set the continue | |
5645 | thread. */ | |
5646 | if (ptid_equal (ptid, minus_one_ptid)) | |
5647 | set_continue_thread (any_thread_ptid); | |
5648 | else | |
5649 | set_continue_thread (ptid); | |
5650 | ||
5651 | ALL_NON_EXITED_THREADS (thread) | |
5652 | resume_clear_thread_private_info (thread); | |
5653 | ||
5654 | buf = rs->buf; | |
5655 | if (execution_direction == EXEC_REVERSE) | |
5656 | { | |
5657 | /* We don't pass signals to the target in reverse exec mode. */ | |
5658 | if (info_verbose && siggnal != GDB_SIGNAL_0) | |
5659 | warning (_(" - Can't pass signal %d to target in reverse: ignored."), | |
5660 | siggnal); | |
5661 | ||
5662 | if (step && packet_support (PACKET_bs) == PACKET_DISABLE) | |
5663 | error (_("Remote reverse-step not supported.")); | |
5664 | if (!step && packet_support (PACKET_bc) == PACKET_DISABLE) | |
5665 | error (_("Remote reverse-continue not supported.")); | |
5666 | ||
5667 | strcpy (buf, step ? "bs" : "bc"); | |
5668 | } | |
5669 | else if (siggnal != GDB_SIGNAL_0) | |
5670 | { | |
5671 | buf[0] = step ? 'S' : 'C'; | |
5672 | buf[1] = tohex (((int) siggnal >> 4) & 0xf); | |
5673 | buf[2] = tohex (((int) siggnal) & 0xf); | |
5674 | buf[3] = '\0'; | |
5675 | } | |
5676 | else | |
5677 | strcpy (buf, step ? "s" : "c"); | |
5678 | ||
5679 | putpkt (buf); | |
5680 | } | |
5681 | ||
5682 | /* Resume the remote inferior by using a "vCont" packet. The thread | |
5683 | to be resumed is PTID; STEP and SIGGNAL indicate whether the | |
5684 | resumed thread should be single-stepped and/or signalled. If PTID | |
5685 | equals minus_one_ptid, then all threads are resumed; the thread to | |
5686 | be stepped and/or signalled is given in the global INFERIOR_PTID. | |
5687 | This function returns non-zero iff it resumes the inferior. | |
5688 | ||
5689 | This function issues a strict subset of all possible vCont commands | |
5690 | at the moment. */ | |
5691 | ||
5692 | static int | |
5693 | remote_resume_with_vcont (ptid_t ptid, int step, enum gdb_signal siggnal) | |
5694 | { | |
5695 | struct remote_state *rs = get_remote_state (); | |
5696 | char *p; | |
5697 | char *endp; | |
5698 | ||
5699 | /* No reverse execution actions defined for vCont. */ | |
5700 | if (execution_direction == EXEC_REVERSE) | |
5701 | return 0; | |
5702 | ||
5703 | if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN) | |
5704 | remote_vcont_probe (rs); | |
5705 | ||
5706 | if (packet_support (PACKET_vCont) == PACKET_DISABLE) | |
5707 | return 0; | |
5708 | ||
5709 | p = rs->buf; | |
5710 | endp = rs->buf + get_remote_packet_size (); | |
5711 | ||
5712 | /* If we could generate a wider range of packets, we'd have to worry | |
5713 | about overflowing BUF. Should there be a generic | |
5714 | "multi-part-packet" packet? */ | |
5715 | ||
5716 | p += xsnprintf (p, endp - p, "vCont"); | |
5717 | ||
5718 | if (ptid_equal (ptid, magic_null_ptid)) | |
5719 | { | |
5720 | /* MAGIC_NULL_PTID means that we don't have any active threads, | |
5721 | so we don't have any TID numbers the inferior will | |
5722 | understand. Make sure to only send forms that do not specify | |
5723 | a TID. */ | |
5724 | append_resumption (p, endp, minus_one_ptid, step, siggnal); | |
5725 | } | |
5726 | else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid)) | |
5727 | { | |
5728 | /* Resume all threads (of all processes, or of a single | |
5729 | process), with preference for INFERIOR_PTID. This assumes | |
5730 | inferior_ptid belongs to the set of all threads we are about | |
5731 | to resume. */ | |
5732 | if (step || siggnal != GDB_SIGNAL_0) | |
5733 | { | |
5734 | /* Step inferior_ptid, with or without signal. */ | |
5735 | p = append_resumption (p, endp, inferior_ptid, step, siggnal); | |
5736 | } | |
5737 | ||
5738 | /* Also pass down any pending signaled resumption for other | |
5739 | threads not the current. */ | |
5740 | p = append_pending_thread_resumptions (p, endp, ptid); | |
5741 | ||
5742 | /* And continue others without a signal. */ | |
5743 | append_resumption (p, endp, ptid, /*step=*/ 0, GDB_SIGNAL_0); | |
5744 | } | |
5745 | else | |
5746 | { | |
5747 | /* Scheduler locking; resume only PTID. */ | |
5748 | append_resumption (p, endp, ptid, step, siggnal); | |
5749 | } | |
5750 | ||
5751 | gdb_assert (strlen (rs->buf) < get_remote_packet_size ()); | |
5752 | putpkt (rs->buf); | |
5753 | ||
5754 | if (target_is_non_stop_p ()) | |
5755 | { | |
5756 | /* In non-stop, the stub replies to vCont with "OK". The stop | |
5757 | reply will be reported asynchronously by means of a `%Stop' | |
5758 | notification. */ | |
5759 | getpkt (&rs->buf, &rs->buf_size, 0); | |
5760 | if (strcmp (rs->buf, "OK") != 0) | |
5761 | error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf); | |
5762 | } | |
5763 | ||
5764 | return 1; | |
5765 | } | |
5766 | ||
5767 | /* Tell the remote machine to resume. */ | |
5768 | ||
5769 | static void | |
5770 | remote_resume (struct target_ops *ops, | |
5771 | ptid_t ptid, int step, enum gdb_signal siggnal) | |
5772 | { | |
5773 | struct remote_state *rs = get_remote_state (); | |
5774 | ||
5775 | /* When connected in non-stop mode, the core resumes threads | |
5776 | individually. Resuming remote threads directly in target_resume | |
5777 | would thus result in sending one packet per thread. Instead, to | |
5778 | minimize roundtrip latency, here we just store the resume | |
5779 | request; the actual remote resumption will be done in | |
5780 | target_commit_resume / remote_commit_resume, where we'll be able | |
5781 | to do vCont action coalescing. */ | |
5782 | if (target_is_non_stop_p () && execution_direction != EXEC_REVERSE) | |
5783 | { | |
5784 | struct private_thread_info *remote_thr; | |
5785 | ||
5786 | if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid)) | |
5787 | remote_thr = get_private_info_ptid (inferior_ptid); | |
5788 | else | |
5789 | remote_thr = get_private_info_ptid (ptid); | |
5790 | remote_thr->last_resume_step = step; | |
5791 | remote_thr->last_resume_sig = siggnal; | |
5792 | return; | |
5793 | } | |
5794 | ||
5795 | /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN | |
5796 | (explained in remote-notif.c:handle_notification) so | |
5797 | remote_notif_process is not called. We need find a place where | |
5798 | it is safe to start a 'vNotif' sequence. It is good to do it | |
5799 | before resuming inferior, because inferior was stopped and no RSP | |
5800 | traffic at that moment. */ | |
5801 | if (!target_is_non_stop_p ()) | |
5802 | remote_notif_process (rs->notif_state, ¬if_client_stop); | |
5803 | ||
5804 | rs->last_resume_exec_dir = execution_direction; | |
5805 | ||
5806 | /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */ | |
5807 | if (!remote_resume_with_vcont (ptid, step, siggnal)) | |
5808 | remote_resume_with_hc (ops, ptid, step, siggnal); | |
5809 | ||
5810 | /* We are about to start executing the inferior, let's register it | |
5811 | with the event loop. NOTE: this is the one place where all the | |
5812 | execution commands end up. We could alternatively do this in each | |
5813 | of the execution commands in infcmd.c. */ | |
5814 | /* FIXME: ezannoni 1999-09-28: We may need to move this out of here | |
5815 | into infcmd.c in order to allow inferior function calls to work | |
5816 | NOT asynchronously. */ | |
5817 | if (target_can_async_p ()) | |
5818 | target_async (1); | |
5819 | ||
5820 | /* We've just told the target to resume. The remote server will | |
5821 | wait for the inferior to stop, and then send a stop reply. In | |
5822 | the mean time, we can't start another command/query ourselves | |
5823 | because the stub wouldn't be ready to process it. This applies | |
5824 | only to the base all-stop protocol, however. In non-stop (which | |
5825 | only supports vCont), the stub replies with an "OK", and is | |
5826 | immediate able to process further serial input. */ | |
5827 | if (!target_is_non_stop_p ()) | |
5828 | rs->waiting_for_stop_reply = 1; | |
5829 | } | |
5830 | ||
5831 | static void check_pending_events_prevent_wildcard_vcont | |
5832 | (int *may_global_wildcard_vcont); | |
5833 | static int is_pending_fork_parent_thread (struct thread_info *thread); | |
5834 | ||
5835 | /* Private per-inferior info for target remote processes. */ | |
5836 | ||
5837 | struct private_inferior | |
5838 | { | |
5839 | /* Whether we can send a wildcard vCont for this process. */ | |
5840 | int may_wildcard_vcont; | |
5841 | }; | |
5842 | ||
5843 | /* Structure used to track the construction of a vCont packet in the | |
5844 | outgoing packet buffer. This is used to send multiple vCont | |
5845 | packets if we have more actions than would fit a single packet. */ | |
5846 | ||
5847 | struct vcont_builder | |
5848 | { | |
5849 | /* Pointer to the first action. P points here if no action has been | |
5850 | appended yet. */ | |
5851 | char *first_action; | |
5852 | ||
5853 | /* Where the next action will be appended. */ | |
5854 | char *p; | |
5855 | ||
5856 | /* The end of the buffer. Must never write past this. */ | |
5857 | char *endp; | |
5858 | }; | |
5859 | ||
5860 | /* Prepare the outgoing buffer for a new vCont packet. */ | |
5861 | ||
5862 | static void | |
5863 | vcont_builder_restart (struct vcont_builder *builder) | |
5864 | { | |
5865 | struct remote_state *rs = get_remote_state (); | |
5866 | ||
5867 | builder->p = rs->buf; | |
5868 | builder->endp = rs->buf + get_remote_packet_size (); | |
5869 | builder->p += xsnprintf (builder->p, builder->endp - builder->p, "vCont"); | |
5870 | builder->first_action = builder->p; | |
5871 | } | |
5872 | ||
5873 | /* If the vCont packet being built has any action, send it to the | |
5874 | remote end. */ | |
5875 | ||
5876 | static void | |
5877 | vcont_builder_flush (struct vcont_builder *builder) | |
5878 | { | |
5879 | struct remote_state *rs; | |
5880 | ||
5881 | if (builder->p == builder->first_action) | |
5882 | return; | |
5883 | ||
5884 | rs = get_remote_state (); | |
5885 | putpkt (rs->buf); | |
5886 | getpkt (&rs->buf, &rs->buf_size, 0); | |
5887 | if (strcmp (rs->buf, "OK") != 0) | |
5888 | error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf); | |
5889 | } | |
5890 | ||
5891 | /* The largest action is range-stepping, with its two addresses. This | |
5892 | is more than sufficient. If a new, bigger action is created, it'll | |
5893 | quickly trigger a failed assertion in append_resumption (and we'll | |
5894 | just bump this). */ | |
5895 | #define MAX_ACTION_SIZE 200 | |
5896 | ||
5897 | /* Append a new vCont action in the outgoing packet being built. If | |
5898 | the action doesn't fit the packet along with previous actions, push | |
5899 | what we've got so far to the remote end and start over a new vCont | |
5900 | packet (with the new action). */ | |
5901 | ||
5902 | static void | |
5903 | vcont_builder_push_action (struct vcont_builder *builder, | |
5904 | ptid_t ptid, int step, enum gdb_signal siggnal) | |
5905 | { | |
5906 | char buf[MAX_ACTION_SIZE + 1]; | |
5907 | char *endp; | |
5908 | size_t rsize; | |
5909 | ||
5910 | endp = append_resumption (buf, buf + sizeof (buf), | |
5911 | ptid, step, siggnal); | |
5912 | ||
5913 | /* Check whether this new action would fit in the vCont packet along | |
5914 | with previous actions. If not, send what we've got so far and | |
5915 | start a new vCont packet. */ | |
5916 | rsize = endp - buf; | |
5917 | if (rsize > builder->endp - builder->p) | |
5918 | { | |
5919 | vcont_builder_flush (builder); | |
5920 | vcont_builder_restart (builder); | |
5921 | ||
5922 | /* Should now fit. */ | |
5923 | gdb_assert (rsize <= builder->endp - builder->p); | |
5924 | } | |
5925 | ||
5926 | memcpy (builder->p, buf, rsize); | |
5927 | builder->p += rsize; | |
5928 | *builder->p = '\0'; | |
5929 | } | |
5930 | ||
5931 | /* to_commit_resume implementation. */ | |
5932 | ||
5933 | static void | |
5934 | remote_commit_resume (struct target_ops *ops) | |
5935 | { | |
5936 | struct remote_state *rs = get_remote_state (); | |
5937 | struct inferior *inf; | |
5938 | struct thread_info *tp; | |
5939 | int any_process_wildcard; | |
5940 | int may_global_wildcard_vcont; | |
5941 | struct vcont_builder vcont_builder; | |
5942 | ||
5943 | /* If connected in all-stop mode, we'd send the remote resume | |
5944 | request directly from remote_resume. Likewise if | |
5945 | reverse-debugging, as there are no defined vCont actions for | |
5946 | reverse execution. */ | |
5947 | if (!target_is_non_stop_p () || execution_direction == EXEC_REVERSE) | |
5948 | return; | |
5949 | ||
5950 | /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1") | |
5951 | instead of resuming all threads of each process individually. | |
5952 | However, if any thread of a process must remain halted, we can't | |
5953 | send wildcard resumes and must send one action per thread. | |
5954 | ||
5955 | Care must be taken to not resume threads/processes the server | |
5956 | side already told us are stopped, but the core doesn't know about | |
5957 | yet, because the events are still in the vStopped notification | |
5958 | queue. For example: | |
5959 | ||
5960 | #1 => vCont s:p1.1;c | |
5961 | #2 <= OK | |
5962 | #3 <= %Stopped T05 p1.1 | |
5963 | #4 => vStopped | |
5964 | #5 <= T05 p1.2 | |
5965 | #6 => vStopped | |
5966 | #7 <= OK | |
5967 | #8 (infrun handles the stop for p1.1 and continues stepping) | |
5968 | #9 => vCont s:p1.1;c | |
5969 | ||
5970 | The last vCont above would resume thread p1.2 by mistake, because | |
5971 | the server has no idea that the event for p1.2 had not been | |
5972 | handled yet. | |
5973 | ||
5974 | The server side must similarly ignore resume actions for the | |
5975 | thread that has a pending %Stopped notification (and any other | |
5976 | threads with events pending), until GDB acks the notification | |
5977 | with vStopped. Otherwise, e.g., the following case is | |
5978 | mishandled: | |
5979 | ||
5980 | #1 => g (or any other packet) | |
5981 | #2 <= [registers] | |
5982 | #3 <= %Stopped T05 p1.2 | |
5983 | #4 => vCont s:p1.1;c | |
5984 | #5 <= OK | |
5985 | ||
5986 | Above, the server must not resume thread p1.2. GDB can't know | |
5987 | that p1.2 stopped until it acks the %Stopped notification, and | |
5988 | since from GDB's perspective all threads should be running, it | |
5989 | sends a "c" action. | |
5990 | ||
5991 | Finally, special care must also be given to handling fork/vfork | |
5992 | events. A (v)fork event actually tells us that two processes | |
5993 | stopped -- the parent and the child. Until we follow the fork, | |
5994 | we must not resume the child. Therefore, if we have a pending | |
5995 | fork follow, we must not send a global wildcard resume action | |
5996 | (vCont;c). We can still send process-wide wildcards though. */ | |
5997 | ||
5998 | /* Start by assuming a global wildcard (vCont;c) is possible. */ | |
5999 | may_global_wildcard_vcont = 1; | |
6000 | ||
6001 | /* And assume every process is individually wildcard-able too. */ | |
6002 | ALL_NON_EXITED_INFERIORS (inf) | |
6003 | { | |
6004 | if (inf->priv == NULL) | |
6005 | inf->priv = XNEW (struct private_inferior); | |
6006 | inf->priv->may_wildcard_vcont = 1; | |
6007 | } | |
6008 | ||
6009 | /* Check for any pending events (not reported or processed yet) and | |
6010 | disable process and global wildcard resumes appropriately. */ | |
6011 | check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont); | |
6012 | ||
6013 | ALL_NON_EXITED_THREADS (tp) | |
6014 | { | |
6015 | /* If a thread of a process is not meant to be resumed, then we | |
6016 | can't wildcard that process. */ | |
6017 | if (!tp->executing) | |
6018 | { | |
6019 | tp->inf->priv->may_wildcard_vcont = 0; | |
6020 | ||
6021 | /* And if we can't wildcard a process, we can't wildcard | |
6022 | everything either. */ | |
6023 | may_global_wildcard_vcont = 0; | |
6024 | continue; | |
6025 | } | |
6026 | ||
6027 | /* If a thread is the parent of an unfollowed fork, then we | |
6028 | can't do a global wildcard, as that would resume the fork | |
6029 | child. */ | |
6030 | if (is_pending_fork_parent_thread (tp)) | |
6031 | may_global_wildcard_vcont = 0; | |
6032 | } | |
6033 | ||
6034 | /* Now let's build the vCont packet(s). Actions must be appended | |
6035 | from narrower to wider scopes (thread -> process -> global). If | |
6036 | we end up with too many actions for a single packet vcont_builder | |
6037 | flushes the current vCont packet to the remote side and starts a | |
6038 | new one. */ | |
6039 | vcont_builder_restart (&vcont_builder); | |
6040 | ||
6041 | /* Threads first. */ | |
6042 | ALL_NON_EXITED_THREADS (tp) | |
6043 | { | |
6044 | struct private_thread_info *remote_thr = tp->priv; | |
6045 | ||
6046 | if (!tp->executing || remote_thr->vcont_resumed) | |
6047 | continue; | |
6048 | ||
6049 | gdb_assert (!thread_is_in_step_over_chain (tp)); | |
6050 | ||
6051 | if (!remote_thr->last_resume_step | |
6052 | && remote_thr->last_resume_sig == GDB_SIGNAL_0 | |
6053 | && tp->inf->priv->may_wildcard_vcont) | |
6054 | { | |
6055 | /* We'll send a wildcard resume instead. */ | |
6056 | remote_thr->vcont_resumed = 1; | |
6057 | continue; | |
6058 | } | |
6059 | ||
6060 | vcont_builder_push_action (&vcont_builder, tp->ptid, | |
6061 | remote_thr->last_resume_step, | |
6062 | remote_thr->last_resume_sig); | |
6063 | remote_thr->vcont_resumed = 1; | |
6064 | } | |
6065 | ||
6066 | /* Now check whether we can send any process-wide wildcard. This is | |
6067 | to avoid sending a global wildcard in the case nothing is | |
6068 | supposed to be resumed. */ | |
6069 | any_process_wildcard = 0; | |
6070 | ||
6071 | ALL_NON_EXITED_INFERIORS (inf) | |
6072 | { | |
6073 | if (inf->priv->may_wildcard_vcont) | |
6074 | { | |
6075 | any_process_wildcard = 1; | |
6076 | break; | |
6077 | } | |
6078 | } | |
6079 | ||
6080 | if (any_process_wildcard) | |
6081 | { | |
6082 | /* If all processes are wildcard-able, then send a single "c" | |
6083 | action, otherwise, send an "all (-1) threads of process" | |
6084 | continue action for each running process, if any. */ | |
6085 | if (may_global_wildcard_vcont) | |
6086 | { | |
6087 | vcont_builder_push_action (&vcont_builder, minus_one_ptid, | |
6088 | 0, GDB_SIGNAL_0); | |
6089 | } | |
6090 | else | |
6091 | { | |
6092 | ALL_NON_EXITED_INFERIORS (inf) | |
6093 | { | |
6094 | if (inf->priv->may_wildcard_vcont) | |
6095 | { | |
6096 | vcont_builder_push_action (&vcont_builder, | |
6097 | pid_to_ptid (inf->pid), | |
6098 | 0, GDB_SIGNAL_0); | |
6099 | } | |
6100 | } | |
6101 | } | |
6102 | } | |
6103 | ||
6104 | vcont_builder_flush (&vcont_builder); | |
6105 | } | |
6106 | ||
6107 | \f | |
6108 | ||
6109 | /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote | |
6110 | thread, all threads of a remote process, or all threads of all | |
6111 | processes. */ | |
6112 | ||
6113 | static void | |
6114 | remote_stop_ns (ptid_t ptid) | |
6115 | { | |
6116 | struct remote_state *rs = get_remote_state (); | |
6117 | char *p = rs->buf; | |
6118 | char *endp = rs->buf + get_remote_packet_size (); | |
6119 | ||
6120 | if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN) | |
6121 | remote_vcont_probe (rs); | |
6122 | ||
6123 | if (!rs->supports_vCont.t) | |
6124 | error (_("Remote server does not support stopping threads")); | |
6125 | ||
6126 | if (ptid_equal (ptid, minus_one_ptid) | |
6127 | || (!remote_multi_process_p (rs) && ptid_is_pid (ptid))) | |
6128 | p += xsnprintf (p, endp - p, "vCont;t"); | |
6129 | else | |
6130 | { | |
6131 | ptid_t nptid; | |
6132 | ||
6133 | p += xsnprintf (p, endp - p, "vCont;t:"); | |
6134 | ||
6135 | if (ptid_is_pid (ptid)) | |
6136 | /* All (-1) threads of process. */ | |
6137 | nptid = ptid_build (ptid_get_pid (ptid), -1, 0); | |
6138 | else | |
6139 | { | |
6140 | /* Small optimization: if we already have a stop reply for | |
6141 | this thread, no use in telling the stub we want this | |
6142 | stopped. */ | |
6143 | if (peek_stop_reply (ptid)) | |
6144 | return; | |
6145 | ||
6146 | nptid = ptid; | |
6147 | } | |
6148 | ||
6149 | write_ptid (p, endp, nptid); | |
6150 | } | |
6151 | ||
6152 | /* In non-stop, we get an immediate OK reply. The stop reply will | |
6153 | come in asynchronously by notification. */ | |
6154 | putpkt (rs->buf); | |
6155 | getpkt (&rs->buf, &rs->buf_size, 0); | |
6156 | if (strcmp (rs->buf, "OK") != 0) | |
6157 | error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf); | |
6158 | } | |
6159 | ||
6160 | /* All-stop version of target_interrupt. Sends a break or a ^C to | |
6161 | interrupt the remote target. It is undefined which thread of which | |
6162 | process reports the interrupt. */ | |
6163 | ||
6164 | static void | |
6165 | remote_interrupt_as (void) | |
6166 | { | |
6167 | struct remote_state *rs = get_remote_state (); | |
6168 | ||
6169 | rs->ctrlc_pending_p = 1; | |
6170 | ||
6171 | /* If the inferior is stopped already, but the core didn't know | |
6172 | about it yet, just ignore the request. The cached wait status | |
6173 | will be collected in remote_wait. */ | |
6174 | if (rs->cached_wait_status) | |
6175 | return; | |
6176 | ||
6177 | /* Send interrupt_sequence to remote target. */ | |
6178 | send_interrupt_sequence (); | |
6179 | } | |
6180 | ||
6181 | /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt | |
6182 | the remote target. It is undefined which thread of which process | |
6183 | reports the interrupt. Throws an error if the packet is not | |
6184 | supported by the server. */ | |
6185 | ||
6186 | static void | |
6187 | remote_interrupt_ns (void) | |
6188 | { | |
6189 | struct remote_state *rs = get_remote_state (); | |
6190 | char *p = rs->buf; | |
6191 | char *endp = rs->buf + get_remote_packet_size (); | |
6192 | ||
6193 | xsnprintf (p, endp - p, "vCtrlC"); | |
6194 | ||
6195 | /* In non-stop, we get an immediate OK reply. The stop reply will | |
6196 | come in asynchronously by notification. */ | |
6197 | putpkt (rs->buf); | |
6198 | getpkt (&rs->buf, &rs->buf_size, 0); | |
6199 | ||
6200 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vCtrlC])) | |
6201 | { | |
6202 | case PACKET_OK: | |
6203 | break; | |
6204 | case PACKET_UNKNOWN: | |
6205 | error (_("No support for interrupting the remote target.")); | |
6206 | case PACKET_ERROR: | |
6207 | error (_("Interrupting target failed: %s"), rs->buf); | |
6208 | } | |
6209 | } | |
6210 | ||
6211 | /* Implement the to_stop function for the remote targets. */ | |
6212 | ||
6213 | static void | |
6214 | remote_stop (struct target_ops *self, ptid_t ptid) | |
6215 | { | |
6216 | if (remote_debug) | |
6217 | fprintf_unfiltered (gdb_stdlog, "remote_stop called\n"); | |
6218 | ||
6219 | if (target_is_non_stop_p ()) | |
6220 | remote_stop_ns (ptid); | |
6221 | else | |
6222 | { | |
6223 | /* We don't currently have a way to transparently pause the | |
6224 | remote target in all-stop mode. Interrupt it instead. */ | |
6225 | remote_interrupt_as (); | |
6226 | } | |
6227 | } | |
6228 | ||
6229 | /* Implement the to_interrupt function for the remote targets. */ | |
6230 | ||
6231 | static void | |
6232 | remote_interrupt (struct target_ops *self, ptid_t ptid) | |
6233 | { | |
6234 | struct remote_state *rs = get_remote_state (); | |
6235 | ||
6236 | if (remote_debug) | |
6237 | fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); | |
6238 | ||
6239 | if (target_is_non_stop_p ()) | |
6240 | remote_interrupt_ns (); | |
6241 | else | |
6242 | remote_interrupt_as (); | |
6243 | } | |
6244 | ||
6245 | /* Implement the to_pass_ctrlc function for the remote targets. */ | |
6246 | ||
6247 | static void | |
6248 | remote_pass_ctrlc (struct target_ops *self) | |
6249 | { | |
6250 | struct remote_state *rs = get_remote_state (); | |
6251 | ||
6252 | if (remote_debug) | |
6253 | fprintf_unfiltered (gdb_stdlog, "remote_pass_ctrlc called\n"); | |
6254 | ||
6255 | /* If we're starting up, we're not fully synced yet. Quit | |
6256 | immediately. */ | |
6257 | if (rs->starting_up) | |
6258 | quit (); | |
6259 | /* If ^C has already been sent once, offer to disconnect. */ | |
6260 | else if (rs->ctrlc_pending_p) | |
6261 | interrupt_query (); | |
6262 | else | |
6263 | target_interrupt (inferior_ptid); | |
6264 | } | |
6265 | ||
6266 | /* Ask the user what to do when an interrupt is received. */ | |
6267 | ||
6268 | static void | |
6269 | interrupt_query (void) | |
6270 | { | |
6271 | struct remote_state *rs = get_remote_state (); | |
6272 | ||
6273 | if (rs->waiting_for_stop_reply && rs->ctrlc_pending_p) | |
6274 | { | |
6275 | if (query (_("The target is not responding to interrupt requests.\n" | |
6276 | "Stop debugging it? "))) | |
6277 | { | |
6278 | remote_unpush_target (); | |
6279 | throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target.")); | |
6280 | } | |
6281 | } | |
6282 | else | |
6283 | { | |
6284 | if (query (_("Interrupted while waiting for the program.\n" | |
6285 | "Give up waiting? "))) | |
6286 | quit (); | |
6287 | } | |
6288 | } | |
6289 | ||
6290 | /* Enable/disable target terminal ownership. Most targets can use | |
6291 | terminal groups to control terminal ownership. Remote targets are | |
6292 | different in that explicit transfer of ownership to/from GDB/target | |
6293 | is required. */ | |
6294 | ||
6295 | static void | |
6296 | remote_terminal_inferior (struct target_ops *self) | |
6297 | { | |
6298 | /* NOTE: At this point we could also register our selves as the | |
6299 | recipient of all input. Any characters typed could then be | |
6300 | passed on down to the target. */ | |
6301 | } | |
6302 | ||
6303 | static void | |
6304 | remote_terminal_ours (struct target_ops *self) | |
6305 | { | |
6306 | } | |
6307 | ||
6308 | static void | |
6309 | remote_console_output (char *msg) | |
6310 | { | |
6311 | char *p; | |
6312 | ||
6313 | for (p = msg; p[0] && p[1]; p += 2) | |
6314 | { | |
6315 | char tb[2]; | |
6316 | char c = fromhex (p[0]) * 16 + fromhex (p[1]); | |
6317 | ||
6318 | tb[0] = c; | |
6319 | tb[1] = 0; | |
6320 | fputs_unfiltered (tb, gdb_stdtarg); | |
6321 | } | |
6322 | gdb_flush (gdb_stdtarg); | |
6323 | } | |
6324 | ||
6325 | DEF_VEC_O(cached_reg_t); | |
6326 | ||
6327 | typedef struct stop_reply | |
6328 | { | |
6329 | struct notif_event base; | |
6330 | ||
6331 | /* The identifier of the thread about this event */ | |
6332 | ptid_t ptid; | |
6333 | ||
6334 | /* The remote state this event is associated with. When the remote | |
6335 | connection, represented by a remote_state object, is closed, | |
6336 | all the associated stop_reply events should be released. */ | |
6337 | struct remote_state *rs; | |
6338 | ||
6339 | struct target_waitstatus ws; | |
6340 | ||
6341 | /* The architecture associated with the expedited registers. */ | |
6342 | gdbarch *arch; | |
6343 | ||
6344 | /* Expedited registers. This makes remote debugging a bit more | |
6345 | efficient for those targets that provide critical registers as | |
6346 | part of their normal status mechanism (as another roundtrip to | |
6347 | fetch them is avoided). */ | |
6348 | VEC(cached_reg_t) *regcache; | |
6349 | ||
6350 | enum target_stop_reason stop_reason; | |
6351 | ||
6352 | CORE_ADDR watch_data_address; | |
6353 | ||
6354 | int core; | |
6355 | } *stop_reply_p; | |
6356 | ||
6357 | DECLARE_QUEUE_P (stop_reply_p); | |
6358 | DEFINE_QUEUE_P (stop_reply_p); | |
6359 | /* The list of already fetched and acknowledged stop events. This | |
6360 | queue is used for notification Stop, and other notifications | |
6361 | don't need queue for their events, because the notification events | |
6362 | of Stop can't be consumed immediately, so that events should be | |
6363 | queued first, and be consumed by remote_wait_{ns,as} one per | |
6364 | time. Other notifications can consume their events immediately, | |
6365 | so queue is not needed for them. */ | |
6366 | static QUEUE (stop_reply_p) *stop_reply_queue; | |
6367 | ||
6368 | static void | |
6369 | stop_reply_xfree (struct stop_reply *r) | |
6370 | { | |
6371 | notif_event_xfree ((struct notif_event *) r); | |
6372 | } | |
6373 | ||
6374 | /* Return the length of the stop reply queue. */ | |
6375 | ||
6376 | static int | |
6377 | stop_reply_queue_length (void) | |
6378 | { | |
6379 | return QUEUE_length (stop_reply_p, stop_reply_queue); | |
6380 | } | |
6381 | ||
6382 | static void | |
6383 | remote_notif_stop_parse (struct notif_client *self, char *buf, | |
6384 | struct notif_event *event) | |
6385 | { | |
6386 | remote_parse_stop_reply (buf, (struct stop_reply *) event); | |
6387 | } | |
6388 | ||
6389 | static void | |
6390 | remote_notif_stop_ack (struct notif_client *self, char *buf, | |
6391 | struct notif_event *event) | |
6392 | { | |
6393 | struct stop_reply *stop_reply = (struct stop_reply *) event; | |
6394 | ||
6395 | /* acknowledge */ | |
6396 | putpkt (self->ack_command); | |
6397 | ||
6398 | if (stop_reply->ws.kind == TARGET_WAITKIND_IGNORE) | |
6399 | /* We got an unknown stop reply. */ | |
6400 | error (_("Unknown stop reply")); | |
6401 | ||
6402 | push_stop_reply (stop_reply); | |
6403 | } | |
6404 | ||
6405 | static int | |
6406 | remote_notif_stop_can_get_pending_events (struct notif_client *self) | |
6407 | { | |
6408 | /* We can't get pending events in remote_notif_process for | |
6409 | notification stop, and we have to do this in remote_wait_ns | |
6410 | instead. If we fetch all queued events from stub, remote stub | |
6411 | may exit and we have no chance to process them back in | |
6412 | remote_wait_ns. */ | |
6413 | mark_async_event_handler (remote_async_inferior_event_token); | |
6414 | return 0; | |
6415 | } | |
6416 | ||
6417 | static void | |
6418 | stop_reply_dtr (struct notif_event *event) | |
6419 | { | |
6420 | struct stop_reply *r = (struct stop_reply *) event; | |
6421 | cached_reg_t *reg; | |
6422 | int ix; | |
6423 | ||
6424 | for (ix = 0; | |
6425 | VEC_iterate (cached_reg_t, r->regcache, ix, reg); | |
6426 | ix++) | |
6427 | xfree (reg->data); | |
6428 | ||
6429 | VEC_free (cached_reg_t, r->regcache); | |
6430 | } | |
6431 | ||
6432 | static struct notif_event * | |
6433 | remote_notif_stop_alloc_reply (void) | |
6434 | { | |
6435 | /* We cast to a pointer to the "base class". */ | |
6436 | struct notif_event *r = (struct notif_event *) XNEW (struct stop_reply); | |
6437 | ||
6438 | r->dtr = stop_reply_dtr; | |
6439 | ||
6440 | return r; | |
6441 | } | |
6442 | ||
6443 | /* A client of notification Stop. */ | |
6444 | ||
6445 | struct notif_client notif_client_stop = | |
6446 | { | |
6447 | "Stop", | |
6448 | "vStopped", | |
6449 | remote_notif_stop_parse, | |
6450 | remote_notif_stop_ack, | |
6451 | remote_notif_stop_can_get_pending_events, | |
6452 | remote_notif_stop_alloc_reply, | |
6453 | REMOTE_NOTIF_STOP, | |
6454 | }; | |
6455 | ||
6456 | /* A parameter to pass data in and out. */ | |
6457 | ||
6458 | struct queue_iter_param | |
6459 | { | |
6460 | void *input; | |
6461 | struct stop_reply *output; | |
6462 | }; | |
6463 | ||
6464 | /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains | |
6465 | the pid of the process that owns the threads we want to check, or | |
6466 | -1 if we want to check all threads. */ | |
6467 | ||
6468 | static int | |
6469 | is_pending_fork_parent (struct target_waitstatus *ws, int event_pid, | |
6470 | ptid_t thread_ptid) | |
6471 | { | |
6472 | if (ws->kind == TARGET_WAITKIND_FORKED | |
6473 | || ws->kind == TARGET_WAITKIND_VFORKED) | |
6474 | { | |
6475 | if (event_pid == -1 || event_pid == ptid_get_pid (thread_ptid)) | |
6476 | return 1; | |
6477 | } | |
6478 | ||
6479 | return 0; | |
6480 | } | |
6481 | ||
6482 | /* Return the thread's pending status used to determine whether the | |
6483 | thread is a fork parent stopped at a fork event. */ | |
6484 | ||
6485 | static struct target_waitstatus * | |
6486 | thread_pending_fork_status (struct thread_info *thread) | |
6487 | { | |
6488 | if (thread->suspend.waitstatus_pending_p) | |
6489 | return &thread->suspend.waitstatus; | |
6490 | else | |
6491 | return &thread->pending_follow; | |
6492 | } | |
6493 | ||
6494 | /* Determine if THREAD is a pending fork parent thread. */ | |
6495 | ||
6496 | static int | |
6497 | is_pending_fork_parent_thread (struct thread_info *thread) | |
6498 | { | |
6499 | struct target_waitstatus *ws = thread_pending_fork_status (thread); | |
6500 | int pid = -1; | |
6501 | ||
6502 | return is_pending_fork_parent (ws, pid, thread->ptid); | |
6503 | } | |
6504 | ||
6505 | /* Check whether EVENT is a fork event, and if it is, remove the | |
6506 | fork child from the context list passed in DATA. */ | |
6507 | ||
6508 | static int | |
6509 | remove_child_of_pending_fork (QUEUE (stop_reply_p) *q, | |
6510 | QUEUE_ITER (stop_reply_p) *iter, | |
6511 | stop_reply_p event, | |
6512 | void *data) | |
6513 | { | |
6514 | struct queue_iter_param *param = (struct queue_iter_param *) data; | |
6515 | struct threads_listing_context *context | |
6516 | = (struct threads_listing_context *) param->input; | |
6517 | ||
6518 | if (event->ws.kind == TARGET_WAITKIND_FORKED | |
6519 | || event->ws.kind == TARGET_WAITKIND_VFORKED | |
6520 | || event->ws.kind == TARGET_WAITKIND_THREAD_EXITED) | |
6521 | threads_listing_context_remove (&event->ws, context); | |
6522 | ||
6523 | return 1; | |
6524 | } | |
6525 | ||
6526 | /* If CONTEXT contains any fork child threads that have not been | |
6527 | reported yet, remove them from the CONTEXT list. If such a | |
6528 | thread exists it is because we are stopped at a fork catchpoint | |
6529 | and have not yet called follow_fork, which will set up the | |
6530 | host-side data structures for the new process. */ | |
6531 | ||
6532 | static void | |
6533 | remove_new_fork_children (struct threads_listing_context *context) | |
6534 | { | |
6535 | struct thread_info * thread; | |
6536 | int pid = -1; | |
6537 | struct notif_client *notif = ¬if_client_stop; | |
6538 | struct queue_iter_param param; | |
6539 | ||
6540 | /* For any threads stopped at a fork event, remove the corresponding | |
6541 | fork child threads from the CONTEXT list. */ | |
6542 | ALL_NON_EXITED_THREADS (thread) | |
6543 | { | |
6544 | struct target_waitstatus *ws = thread_pending_fork_status (thread); | |
6545 | ||
6546 | if (is_pending_fork_parent (ws, pid, thread->ptid)) | |
6547 | { | |
6548 | threads_listing_context_remove (ws, context); | |
6549 | } | |
6550 | } | |
6551 | ||
6552 | /* Check for any pending fork events (not reported or processed yet) | |
6553 | in process PID and remove those fork child threads from the | |
6554 | CONTEXT list as well. */ | |
6555 | remote_notif_get_pending_events (notif); | |
6556 | param.input = context; | |
6557 | param.output = NULL; | |
6558 | QUEUE_iterate (stop_reply_p, stop_reply_queue, | |
6559 | remove_child_of_pending_fork, ¶m); | |
6560 | } | |
6561 | ||
6562 | /* Check whether EVENT would prevent a global or process wildcard | |
6563 | vCont action. */ | |
6564 | ||
6565 | static int | |
6566 | check_pending_event_prevents_wildcard_vcont_callback | |
6567 | (QUEUE (stop_reply_p) *q, | |
6568 | QUEUE_ITER (stop_reply_p) *iter, | |
6569 | stop_reply_p event, | |
6570 | void *data) | |
6571 | { | |
6572 | struct inferior *inf; | |
6573 | int *may_global_wildcard_vcont = (int *) data; | |
6574 | ||
6575 | if (event->ws.kind == TARGET_WAITKIND_NO_RESUMED | |
6576 | || event->ws.kind == TARGET_WAITKIND_NO_HISTORY) | |
6577 | return 1; | |
6578 | ||
6579 | if (event->ws.kind == TARGET_WAITKIND_FORKED | |
6580 | || event->ws.kind == TARGET_WAITKIND_VFORKED) | |
6581 | *may_global_wildcard_vcont = 0; | |
6582 | ||
6583 | inf = find_inferior_ptid (event->ptid); | |
6584 | ||
6585 | /* This may be the first time we heard about this process. | |
6586 | Regardless, we must not do a global wildcard resume, otherwise | |
6587 | we'd resume this process too. */ | |
6588 | *may_global_wildcard_vcont = 0; | |
6589 | if (inf != NULL) | |
6590 | inf->priv->may_wildcard_vcont = 0; | |
6591 | ||
6592 | return 1; | |
6593 | } | |
6594 | ||
6595 | /* Check whether any event pending in the vStopped queue would prevent | |
6596 | a global or process wildcard vCont action. Clear | |
6597 | *may_global_wildcard if we can't do a global wildcard (vCont;c), | |
6598 | and clear the event inferior's may_wildcard_vcont flag if we can't | |
6599 | do a process-wide wildcard resume (vCont;c:pPID.-1). */ | |
6600 | ||
6601 | static void | |
6602 | check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard) | |
6603 | { | |
6604 | struct notif_client *notif = ¬if_client_stop; | |
6605 | ||
6606 | remote_notif_get_pending_events (notif); | |
6607 | QUEUE_iterate (stop_reply_p, stop_reply_queue, | |
6608 | check_pending_event_prevents_wildcard_vcont_callback, | |
6609 | may_global_wildcard); | |
6610 | } | |
6611 | ||
6612 | /* Remove stop replies in the queue if its pid is equal to the given | |
6613 | inferior's pid. */ | |
6614 | ||
6615 | static int | |
6616 | remove_stop_reply_for_inferior (QUEUE (stop_reply_p) *q, | |
6617 | QUEUE_ITER (stop_reply_p) *iter, | |
6618 | stop_reply_p event, | |
6619 | void *data) | |
6620 | { | |
6621 | struct queue_iter_param *param = (struct queue_iter_param *) data; | |
6622 | struct inferior *inf = (struct inferior *) param->input; | |
6623 | ||
6624 | if (ptid_get_pid (event->ptid) == inf->pid) | |
6625 | { | |
6626 | stop_reply_xfree (event); | |
6627 | QUEUE_remove_elem (stop_reply_p, q, iter); | |
6628 | } | |
6629 | ||
6630 | return 1; | |
6631 | } | |
6632 | ||
6633 | /* Discard all pending stop replies of inferior INF. */ | |
6634 | ||
6635 | static void | |
6636 | discard_pending_stop_replies (struct inferior *inf) | |
6637 | { | |
6638 | struct queue_iter_param param; | |
6639 | struct stop_reply *reply; | |
6640 | struct remote_state *rs = get_remote_state (); | |
6641 | struct remote_notif_state *rns = rs->notif_state; | |
6642 | ||
6643 | /* This function can be notified when an inferior exists. When the | |
6644 | target is not remote, the notification state is NULL. */ | |
6645 | if (rs->remote_desc == NULL) | |
6646 | return; | |
6647 | ||
6648 | reply = (struct stop_reply *) rns->pending_event[notif_client_stop.id]; | |
6649 | ||
6650 | /* Discard the in-flight notification. */ | |
6651 | if (reply != NULL && ptid_get_pid (reply->ptid) == inf->pid) | |
6652 | { | |
6653 | stop_reply_xfree (reply); | |
6654 | rns->pending_event[notif_client_stop.id] = NULL; | |
6655 | } | |
6656 | ||
6657 | param.input = inf; | |
6658 | param.output = NULL; | |
6659 | /* Discard the stop replies we have already pulled with | |
6660 | vStopped. */ | |
6661 | QUEUE_iterate (stop_reply_p, stop_reply_queue, | |
6662 | remove_stop_reply_for_inferior, ¶m); | |
6663 | } | |
6664 | ||
6665 | /* If its remote state is equal to the given remote state, | |
6666 | remove EVENT from the stop reply queue. */ | |
6667 | ||
6668 | static int | |
6669 | remove_stop_reply_of_remote_state (QUEUE (stop_reply_p) *q, | |
6670 | QUEUE_ITER (stop_reply_p) *iter, | |
6671 | stop_reply_p event, | |
6672 | void *data) | |
6673 | { | |
6674 | struct queue_iter_param *param = (struct queue_iter_param *) data; | |
6675 | struct remote_state *rs = (struct remote_state *) param->input; | |
6676 | ||
6677 | if (event->rs == rs) | |
6678 | { | |
6679 | stop_reply_xfree (event); | |
6680 | QUEUE_remove_elem (stop_reply_p, q, iter); | |
6681 | } | |
6682 | ||
6683 | return 1; | |
6684 | } | |
6685 | ||
6686 | /* Discard the stop replies for RS in stop_reply_queue. */ | |
6687 | ||
6688 | static void | |
6689 | discard_pending_stop_replies_in_queue (struct remote_state *rs) | |
6690 | { | |
6691 | struct queue_iter_param param; | |
6692 | ||
6693 | param.input = rs; | |
6694 | param.output = NULL; | |
6695 | /* Discard the stop replies we have already pulled with | |
6696 | vStopped. */ | |
6697 | QUEUE_iterate (stop_reply_p, stop_reply_queue, | |
6698 | remove_stop_reply_of_remote_state, ¶m); | |
6699 | } | |
6700 | ||
6701 | /* A parameter to pass data in and out. */ | |
6702 | ||
6703 | static int | |
6704 | remote_notif_remove_once_on_match (QUEUE (stop_reply_p) *q, | |
6705 | QUEUE_ITER (stop_reply_p) *iter, | |
6706 | stop_reply_p event, | |
6707 | void *data) | |
6708 | { | |
6709 | struct queue_iter_param *param = (struct queue_iter_param *) data; | |
6710 | ptid_t *ptid = (ptid_t *) param->input; | |
6711 | ||
6712 | if (ptid_match (event->ptid, *ptid)) | |
6713 | { | |
6714 | param->output = event; | |
6715 | QUEUE_remove_elem (stop_reply_p, q, iter); | |
6716 | return 0; | |
6717 | } | |
6718 | ||
6719 | return 1; | |
6720 | } | |
6721 | ||
6722 | /* Remove the first reply in 'stop_reply_queue' which matches | |
6723 | PTID. */ | |
6724 | ||
6725 | static struct stop_reply * | |
6726 | remote_notif_remove_queued_reply (ptid_t ptid) | |
6727 | { | |
6728 | struct queue_iter_param param; | |
6729 | ||
6730 | param.input = &ptid; | |
6731 | param.output = NULL; | |
6732 | ||
6733 | QUEUE_iterate (stop_reply_p, stop_reply_queue, | |
6734 | remote_notif_remove_once_on_match, ¶m); | |
6735 | if (notif_debug) | |
6736 | fprintf_unfiltered (gdb_stdlog, | |
6737 | "notif: discard queued event: 'Stop' in %s\n", | |
6738 | target_pid_to_str (ptid)); | |
6739 | ||
6740 | return param.output; | |
6741 | } | |
6742 | ||
6743 | /* Look for a queued stop reply belonging to PTID. If one is found, | |
6744 | remove it from the queue, and return it. Returns NULL if none is | |
6745 | found. If there are still queued events left to process, tell the | |
6746 | event loop to get back to target_wait soon. */ | |
6747 | ||
6748 | static struct stop_reply * | |
6749 | queued_stop_reply (ptid_t ptid) | |
6750 | { | |
6751 | struct stop_reply *r = remote_notif_remove_queued_reply (ptid); | |
6752 | ||
6753 | if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue)) | |
6754 | /* There's still at least an event left. */ | |
6755 | mark_async_event_handler (remote_async_inferior_event_token); | |
6756 | ||
6757 | return r; | |
6758 | } | |
6759 | ||
6760 | /* Push a fully parsed stop reply in the stop reply queue. Since we | |
6761 | know that we now have at least one queued event left to pass to the | |
6762 | core side, tell the event loop to get back to target_wait soon. */ | |
6763 | ||
6764 | static void | |
6765 | push_stop_reply (struct stop_reply *new_event) | |
6766 | { | |
6767 | QUEUE_enque (stop_reply_p, stop_reply_queue, new_event); | |
6768 | ||
6769 | if (notif_debug) | |
6770 | fprintf_unfiltered (gdb_stdlog, | |
6771 | "notif: push 'Stop' %s to queue %d\n", | |
6772 | target_pid_to_str (new_event->ptid), | |
6773 | QUEUE_length (stop_reply_p, | |
6774 | stop_reply_queue)); | |
6775 | ||
6776 | mark_async_event_handler (remote_async_inferior_event_token); | |
6777 | } | |
6778 | ||
6779 | static int | |
6780 | stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p) *q, | |
6781 | QUEUE_ITER (stop_reply_p) *iter, | |
6782 | struct stop_reply *event, | |
6783 | void *data) | |
6784 | { | |
6785 | ptid_t *ptid = (ptid_t *) data; | |
6786 | ||
6787 | return !(ptid_equal (*ptid, event->ptid) | |
6788 | && event->ws.kind == TARGET_WAITKIND_STOPPED); | |
6789 | } | |
6790 | ||
6791 | /* Returns true if we have a stop reply for PTID. */ | |
6792 | ||
6793 | static int | |
6794 | peek_stop_reply (ptid_t ptid) | |
6795 | { | |
6796 | return !QUEUE_iterate (stop_reply_p, stop_reply_queue, | |
6797 | stop_reply_match_ptid_and_ws, &ptid); | |
6798 | } | |
6799 | ||
6800 | /* Helper for remote_parse_stop_reply. Return nonzero if the substring | |
6801 | starting with P and ending with PEND matches PREFIX. */ | |
6802 | ||
6803 | static int | |
6804 | strprefix (const char *p, const char *pend, const char *prefix) | |
6805 | { | |
6806 | for ( ; p < pend; p++, prefix++) | |
6807 | if (*p != *prefix) | |
6808 | return 0; | |
6809 | return *prefix == '\0'; | |
6810 | } | |
6811 | ||
6812 | /* Parse the stop reply in BUF. Either the function succeeds, and the | |
6813 | result is stored in EVENT, or throws an error. */ | |
6814 | ||
6815 | static void | |
6816 | remote_parse_stop_reply (char *buf, struct stop_reply *event) | |
6817 | { | |
6818 | remote_arch_state *rsa = NULL; | |
6819 | ULONGEST addr; | |
6820 | const char *p; | |
6821 | int skipregs = 0; | |
6822 | ||
6823 | event->ptid = null_ptid; | |
6824 | event->rs = get_remote_state (); | |
6825 | event->ws.kind = TARGET_WAITKIND_IGNORE; | |
6826 | event->ws.value.integer = 0; | |
6827 | event->stop_reason = TARGET_STOPPED_BY_NO_REASON; | |
6828 | event->regcache = NULL; | |
6829 | event->core = -1; | |
6830 | ||
6831 | switch (buf[0]) | |
6832 | { | |
6833 | case 'T': /* Status with PC, SP, FP, ... */ | |
6834 | /* Expedited reply, containing Signal, {regno, reg} repeat. */ | |
6835 | /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where | |
6836 | ss = signal number | |
6837 | n... = register number | |
6838 | r... = register contents | |
6839 | */ | |
6840 | ||
6841 | p = &buf[3]; /* after Txx */ | |
6842 | while (*p) | |
6843 | { | |
6844 | const char *p1; | |
6845 | int fieldsize; | |
6846 | ||
6847 | p1 = strchr (p, ':'); | |
6848 | if (p1 == NULL) | |
6849 | error (_("Malformed packet(a) (missing colon): %s\n\ | |
6850 | Packet: '%s'\n"), | |
6851 | p, buf); | |
6852 | if (p == p1) | |
6853 | error (_("Malformed packet(a) (missing register number): %s\n\ | |
6854 | Packet: '%s'\n"), | |
6855 | p, buf); | |
6856 | ||
6857 | /* Some "registers" are actually extended stop information. | |
6858 | Note if you're adding a new entry here: GDB 7.9 and | |
6859 | earlier assume that all register "numbers" that start | |
6860 | with an hex digit are real register numbers. Make sure | |
6861 | the server only sends such a packet if it knows the | |
6862 | client understands it. */ | |
6863 | ||
6864 | if (strprefix (p, p1, "thread")) | |
6865 | event->ptid = read_ptid (++p1, &p); | |
6866 | else if (strprefix (p, p1, "syscall_entry")) | |
6867 | { | |
6868 | ULONGEST sysno; | |
6869 | ||
6870 | event->ws.kind = TARGET_WAITKIND_SYSCALL_ENTRY; | |
6871 | p = unpack_varlen_hex (++p1, &sysno); | |
6872 | event->ws.value.syscall_number = (int) sysno; | |
6873 | } | |
6874 | else if (strprefix (p, p1, "syscall_return")) | |
6875 | { | |
6876 | ULONGEST sysno; | |
6877 | ||
6878 | event->ws.kind = TARGET_WAITKIND_SYSCALL_RETURN; | |
6879 | p = unpack_varlen_hex (++p1, &sysno); | |
6880 | event->ws.value.syscall_number = (int) sysno; | |
6881 | } | |
6882 | else if (strprefix (p, p1, "watch") | |
6883 | || strprefix (p, p1, "rwatch") | |
6884 | || strprefix (p, p1, "awatch")) | |
6885 | { | |
6886 | event->stop_reason = TARGET_STOPPED_BY_WATCHPOINT; | |
6887 | p = unpack_varlen_hex (++p1, &addr); | |
6888 | event->watch_data_address = (CORE_ADDR) addr; | |
6889 | } | |
6890 | else if (strprefix (p, p1, "swbreak")) | |
6891 | { | |
6892 | event->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT; | |
6893 | ||
6894 | /* Make sure the stub doesn't forget to indicate support | |
6895 | with qSupported. */ | |
6896 | if (packet_support (PACKET_swbreak_feature) != PACKET_ENABLE) | |
6897 | error (_("Unexpected swbreak stop reason")); | |
6898 | ||
6899 | /* The value part is documented as "must be empty", | |
6900 | though we ignore it, in case we ever decide to make | |
6901 | use of it in a backward compatible way. */ | |
6902 | p = strchrnul (p1 + 1, ';'); | |
6903 | } | |
6904 | else if (strprefix (p, p1, "hwbreak")) | |
6905 | { | |
6906 | event->stop_reason = TARGET_STOPPED_BY_HW_BREAKPOINT; | |
6907 | ||
6908 | /* Make sure the stub doesn't forget to indicate support | |
6909 | with qSupported. */ | |
6910 | if (packet_support (PACKET_hwbreak_feature) != PACKET_ENABLE) | |
6911 | error (_("Unexpected hwbreak stop reason")); | |
6912 | ||
6913 | /* See above. */ | |
6914 | p = strchrnul (p1 + 1, ';'); | |
6915 | } | |
6916 | else if (strprefix (p, p1, "library")) | |
6917 | { | |
6918 | event->ws.kind = TARGET_WAITKIND_LOADED; | |
6919 | p = strchrnul (p1 + 1, ';'); | |
6920 | } | |
6921 | else if (strprefix (p, p1, "replaylog")) | |
6922 | { | |
6923 | event->ws.kind = TARGET_WAITKIND_NO_HISTORY; | |
6924 | /* p1 will indicate "begin" or "end", but it makes | |
6925 | no difference for now, so ignore it. */ | |
6926 | p = strchrnul (p1 + 1, ';'); | |
6927 | } | |
6928 | else if (strprefix (p, p1, "core")) | |
6929 | { | |
6930 | ULONGEST c; | |
6931 | ||
6932 | p = unpack_varlen_hex (++p1, &c); | |
6933 | event->core = c; | |
6934 | } | |
6935 | else if (strprefix (p, p1, "fork")) | |
6936 | { | |
6937 | event->ws.value.related_pid = read_ptid (++p1, &p); | |
6938 | event->ws.kind = TARGET_WAITKIND_FORKED; | |
6939 | } | |
6940 | else if (strprefix (p, p1, "vfork")) | |
6941 | { | |
6942 | event->ws.value.related_pid = read_ptid (++p1, &p); | |
6943 | event->ws.kind = TARGET_WAITKIND_VFORKED; | |
6944 | } | |
6945 | else if (strprefix (p, p1, "vforkdone")) | |
6946 | { | |
6947 | event->ws.kind = TARGET_WAITKIND_VFORK_DONE; | |
6948 | p = strchrnul (p1 + 1, ';'); | |
6949 | } | |
6950 | else if (strprefix (p, p1, "exec")) | |
6951 | { | |
6952 | ULONGEST ignored; | |
6953 | char pathname[PATH_MAX]; | |
6954 | int pathlen; | |
6955 | ||
6956 | /* Determine the length of the execd pathname. */ | |
6957 | p = unpack_varlen_hex (++p1, &ignored); | |
6958 | pathlen = (p - p1) / 2; | |
6959 | ||
6960 | /* Save the pathname for event reporting and for | |
6961 | the next run command. */ | |
6962 | hex2bin (p1, (gdb_byte *) pathname, pathlen); | |
6963 | pathname[pathlen] = '\0'; | |
6964 | ||
6965 | /* This is freed during event handling. */ | |
6966 | event->ws.value.execd_pathname = xstrdup (pathname); | |
6967 | event->ws.kind = TARGET_WAITKIND_EXECD; | |
6968 | ||
6969 | /* Skip the registers included in this packet, since | |
6970 | they may be for an architecture different from the | |
6971 | one used by the original program. */ | |
6972 | skipregs = 1; | |
6973 | } | |
6974 | else if (strprefix (p, p1, "create")) | |
6975 | { | |
6976 | event->ws.kind = TARGET_WAITKIND_THREAD_CREATED; | |
6977 | p = strchrnul (p1 + 1, ';'); | |
6978 | } | |
6979 | else | |
6980 | { | |
6981 | ULONGEST pnum; | |
6982 | const char *p_temp; | |
6983 | ||
6984 | if (skipregs) | |
6985 | { | |
6986 | p = strchrnul (p1 + 1, ';'); | |
6987 | p++; | |
6988 | continue; | |
6989 | } | |
6990 | ||
6991 | /* Maybe a real ``P'' register number. */ | |
6992 | p_temp = unpack_varlen_hex (p, &pnum); | |
6993 | /* If the first invalid character is the colon, we got a | |
6994 | register number. Otherwise, it's an unknown stop | |
6995 | reason. */ | |
6996 | if (p_temp == p1) | |
6997 | { | |
6998 | /* If we haven't parsed the event's thread yet, find | |
6999 | it now, in order to find the architecture of the | |
7000 | reported expedited registers. */ | |
7001 | if (event->ptid == null_ptid) | |
7002 | { | |
7003 | const char *thr = strstr (p1 + 1, ";thread:"); | |
7004 | if (thr != NULL) | |
7005 | event->ptid = read_ptid (thr + strlen (";thread:"), | |
7006 | NULL); | |
7007 | else | |
7008 | event->ptid = magic_null_ptid; | |
7009 | } | |
7010 | ||
7011 | if (rsa == NULL) | |
7012 | { | |
7013 | inferior *inf = (event->ptid == null_ptid | |
7014 | ? NULL | |
7015 | : find_inferior_ptid (event->ptid)); | |
7016 | /* If this is the first time we learn anything | |
7017 | about this process, skip the registers | |
7018 | included in this packet, since we don't yet | |
7019 | know which architecture to use to parse them. | |
7020 | We'll determine the architecture later when | |
7021 | we process the stop reply and retrieve the | |
7022 | target description, via | |
7023 | remote_notice_new_inferior -> | |
7024 | post_create_inferior. */ | |
7025 | if (inf == NULL) | |
7026 | { | |
7027 | p = strchrnul (p1 + 1, ';'); | |
7028 | p++; | |
7029 | continue; | |
7030 | } | |
7031 | ||
7032 | event->arch = inf->gdbarch; | |
7033 | rsa = get_remote_arch_state (event->arch); | |
7034 | } | |
7035 | ||
7036 | packet_reg *reg | |
7037 | = packet_reg_from_pnum (event->arch, rsa, pnum); | |
7038 | cached_reg_t cached_reg; | |
7039 | ||
7040 | if (reg == NULL) | |
7041 | error (_("Remote sent bad register number %s: %s\n\ | |
7042 | Packet: '%s'\n"), | |
7043 | hex_string (pnum), p, buf); | |
7044 | ||
7045 | cached_reg.num = reg->regnum; | |
7046 | cached_reg.data = (gdb_byte *) | |
7047 | xmalloc (register_size (event->arch, reg->regnum)); | |
7048 | ||
7049 | p = p1 + 1; | |
7050 | fieldsize = hex2bin (p, cached_reg.data, | |
7051 | register_size (event->arch, reg->regnum)); | |
7052 | p += 2 * fieldsize; | |
7053 | if (fieldsize < register_size (event->arch, reg->regnum)) | |
7054 | warning (_("Remote reply is too short: %s"), buf); | |
7055 | ||
7056 | VEC_safe_push (cached_reg_t, event->regcache, &cached_reg); | |
7057 | } | |
7058 | else | |
7059 | { | |
7060 | /* Not a number. Silently skip unknown optional | |
7061 | info. */ | |
7062 | p = strchrnul (p1 + 1, ';'); | |
7063 | } | |
7064 | } | |
7065 | ||
7066 | if (*p != ';') | |
7067 | error (_("Remote register badly formatted: %s\nhere: %s"), | |
7068 | buf, p); | |
7069 | ++p; | |
7070 | } | |
7071 | ||
7072 | if (event->ws.kind != TARGET_WAITKIND_IGNORE) | |
7073 | break; | |
7074 | ||
7075 | /* fall through */ | |
7076 | case 'S': /* Old style status, just signal only. */ | |
7077 | { | |
7078 | int sig; | |
7079 | ||
7080 | event->ws.kind = TARGET_WAITKIND_STOPPED; | |
7081 | sig = (fromhex (buf[1]) << 4) + fromhex (buf[2]); | |
7082 | if (GDB_SIGNAL_FIRST <= sig && sig < GDB_SIGNAL_LAST) | |
7083 | event->ws.value.sig = (enum gdb_signal) sig; | |
7084 | else | |
7085 | event->ws.value.sig = GDB_SIGNAL_UNKNOWN; | |
7086 | } | |
7087 | break; | |
7088 | case 'w': /* Thread exited. */ | |
7089 | { | |
7090 | const char *p; | |
7091 | ULONGEST value; | |
7092 | ||
7093 | event->ws.kind = TARGET_WAITKIND_THREAD_EXITED; | |
7094 | p = unpack_varlen_hex (&buf[1], &value); | |
7095 | event->ws.value.integer = value; | |
7096 | if (*p != ';') | |
7097 | error (_("stop reply packet badly formatted: %s"), buf); | |
7098 | event->ptid = read_ptid (++p, NULL); | |
7099 | break; | |
7100 | } | |
7101 | case 'W': /* Target exited. */ | |
7102 | case 'X': | |
7103 | { | |
7104 | const char *p; | |
7105 | int pid; | |
7106 | ULONGEST value; | |
7107 | ||
7108 | /* GDB used to accept only 2 hex chars here. Stubs should | |
7109 | only send more if they detect GDB supports multi-process | |
7110 | support. */ | |
7111 | p = unpack_varlen_hex (&buf[1], &value); | |
7112 | ||
7113 | if (buf[0] == 'W') | |
7114 | { | |
7115 | /* The remote process exited. */ | |
7116 | event->ws.kind = TARGET_WAITKIND_EXITED; | |
7117 | event->ws.value.integer = value; | |
7118 | } | |
7119 | else | |
7120 | { | |
7121 | /* The remote process exited with a signal. */ | |
7122 | event->ws.kind = TARGET_WAITKIND_SIGNALLED; | |
7123 | if (GDB_SIGNAL_FIRST <= value && value < GDB_SIGNAL_LAST) | |
7124 | event->ws.value.sig = (enum gdb_signal) value; | |
7125 | else | |
7126 | event->ws.value.sig = GDB_SIGNAL_UNKNOWN; | |
7127 | } | |
7128 | ||
7129 | /* If no process is specified, assume inferior_ptid. */ | |
7130 | pid = ptid_get_pid (inferior_ptid); | |
7131 | if (*p == '\0') | |
7132 | ; | |
7133 | else if (*p == ';') | |
7134 | { | |
7135 | p++; | |
7136 | ||
7137 | if (*p == '\0') | |
7138 | ; | |
7139 | else if (startswith (p, "process:")) | |
7140 | { | |
7141 | ULONGEST upid; | |
7142 | ||
7143 | p += sizeof ("process:") - 1; | |
7144 | unpack_varlen_hex (p, &upid); | |
7145 | pid = upid; | |
7146 | } | |
7147 | else | |
7148 | error (_("unknown stop reply packet: %s"), buf); | |
7149 | } | |
7150 | else | |
7151 | error (_("unknown stop reply packet: %s"), buf); | |
7152 | event->ptid = pid_to_ptid (pid); | |
7153 | } | |
7154 | break; | |
7155 | case 'N': | |
7156 | event->ws.kind = TARGET_WAITKIND_NO_RESUMED; | |
7157 | event->ptid = minus_one_ptid; | |
7158 | break; | |
7159 | } | |
7160 | ||
7161 | if (target_is_non_stop_p () && ptid_equal (event->ptid, null_ptid)) | |
7162 | error (_("No process or thread specified in stop reply: %s"), buf); | |
7163 | } | |
7164 | ||
7165 | /* When the stub wants to tell GDB about a new notification reply, it | |
7166 | sends a notification (%Stop, for example). Those can come it at | |
7167 | any time, hence, we have to make sure that any pending | |
7168 | putpkt/getpkt sequence we're making is finished, before querying | |
7169 | the stub for more events with the corresponding ack command | |
7170 | (vStopped, for example). E.g., if we started a vStopped sequence | |
7171 | immediately upon receiving the notification, something like this | |
7172 | could happen: | |
7173 | ||
7174 | 1.1) --> Hg 1 | |
7175 | 1.2) <-- OK | |
7176 | 1.3) --> g | |
7177 | 1.4) <-- %Stop | |
7178 | 1.5) --> vStopped | |
7179 | 1.6) <-- (registers reply to step #1.3) | |
7180 | ||
7181 | Obviously, the reply in step #1.6 would be unexpected to a vStopped | |
7182 | query. | |
7183 | ||
7184 | To solve this, whenever we parse a %Stop notification successfully, | |
7185 | we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on | |
7186 | doing whatever we were doing: | |
7187 | ||
7188 | 2.1) --> Hg 1 | |
7189 | 2.2) <-- OK | |
7190 | 2.3) --> g | |
7191 | 2.4) <-- %Stop | |
7192 | <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN> | |
7193 | 2.5) <-- (registers reply to step #2.3) | |
7194 | ||
7195 | Eventualy after step #2.5, we return to the event loop, which | |
7196 | notices there's an event on the | |
7197 | REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the | |
7198 | associated callback --- the function below. At this point, we're | |
7199 | always safe to start a vStopped sequence. : | |
7200 | ||
7201 | 2.6) --> vStopped | |
7202 | 2.7) <-- T05 thread:2 | |
7203 | 2.8) --> vStopped | |
7204 | 2.9) --> OK | |
7205 | */ | |
7206 | ||
7207 | void | |
7208 | remote_notif_get_pending_events (struct notif_client *nc) | |
7209 | { | |
7210 | struct remote_state *rs = get_remote_state (); | |
7211 | ||
7212 | if (rs->notif_state->pending_event[nc->id] != NULL) | |
7213 | { | |
7214 | if (notif_debug) | |
7215 | fprintf_unfiltered (gdb_stdlog, | |
7216 | "notif: process: '%s' ack pending event\n", | |
7217 | nc->name); | |
7218 | ||
7219 | /* acknowledge */ | |
7220 | nc->ack (nc, rs->buf, rs->notif_state->pending_event[nc->id]); | |
7221 | rs->notif_state->pending_event[nc->id] = NULL; | |
7222 | ||
7223 | while (1) | |
7224 | { | |
7225 | getpkt (&rs->buf, &rs->buf_size, 0); | |
7226 | if (strcmp (rs->buf, "OK") == 0) | |
7227 | break; | |
7228 | else | |
7229 | remote_notif_ack (nc, rs->buf); | |
7230 | } | |
7231 | } | |
7232 | else | |
7233 | { | |
7234 | if (notif_debug) | |
7235 | fprintf_unfiltered (gdb_stdlog, | |
7236 | "notif: process: '%s' no pending reply\n", | |
7237 | nc->name); | |
7238 | } | |
7239 | } | |
7240 | ||
7241 | /* Called when it is decided that STOP_REPLY holds the info of the | |
7242 | event that is to be returned to the core. This function always | |
7243 | destroys STOP_REPLY. */ | |
7244 | ||
7245 | static ptid_t | |
7246 | process_stop_reply (struct stop_reply *stop_reply, | |
7247 | struct target_waitstatus *status) | |
7248 | { | |
7249 | ptid_t ptid; | |
7250 | ||
7251 | *status = stop_reply->ws; | |
7252 | ptid = stop_reply->ptid; | |
7253 | ||
7254 | /* If no thread/process was reported by the stub, assume the current | |
7255 | inferior. */ | |
7256 | if (ptid_equal (ptid, null_ptid)) | |
7257 | ptid = inferior_ptid; | |
7258 | ||
7259 | if (status->kind != TARGET_WAITKIND_EXITED | |
7260 | && status->kind != TARGET_WAITKIND_SIGNALLED | |
7261 | && status->kind != TARGET_WAITKIND_NO_RESUMED) | |
7262 | { | |
7263 | struct private_thread_info *remote_thr; | |
7264 | ||
7265 | /* Expedited registers. */ | |
7266 | if (stop_reply->regcache) | |
7267 | { | |
7268 | struct regcache *regcache | |
7269 | = get_thread_arch_regcache (ptid, stop_reply->arch); | |
7270 | cached_reg_t *reg; | |
7271 | int ix; | |
7272 | ||
7273 | for (ix = 0; | |
7274 | VEC_iterate (cached_reg_t, stop_reply->regcache, ix, reg); | |
7275 | ix++) | |
7276 | { | |
7277 | regcache_raw_supply (regcache, reg->num, reg->data); | |
7278 | xfree (reg->data); | |
7279 | } | |
7280 | ||
7281 | VEC_free (cached_reg_t, stop_reply->regcache); | |
7282 | } | |
7283 | ||
7284 | remote_notice_new_inferior (ptid, 0); | |
7285 | remote_thr = get_private_info_ptid (ptid); | |
7286 | remote_thr->core = stop_reply->core; | |
7287 | remote_thr->stop_reason = stop_reply->stop_reason; | |
7288 | remote_thr->watch_data_address = stop_reply->watch_data_address; | |
7289 | remote_thr->vcont_resumed = 0; | |
7290 | } | |
7291 | ||
7292 | stop_reply_xfree (stop_reply); | |
7293 | return ptid; | |
7294 | } | |
7295 | ||
7296 | /* The non-stop mode version of target_wait. */ | |
7297 | ||
7298 | static ptid_t | |
7299 | remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options) | |
7300 | { | |
7301 | struct remote_state *rs = get_remote_state (); | |
7302 | struct stop_reply *stop_reply; | |
7303 | int ret; | |
7304 | int is_notif = 0; | |
7305 | ||
7306 | /* If in non-stop mode, get out of getpkt even if a | |
7307 | notification is received. */ | |
7308 | ||
7309 | ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size, | |
7310 | 0 /* forever */, &is_notif); | |
7311 | while (1) | |
7312 | { | |
7313 | if (ret != -1 && !is_notif) | |
7314 | switch (rs->buf[0]) | |
7315 | { | |
7316 | case 'E': /* Error of some sort. */ | |
7317 | /* We're out of sync with the target now. Did it continue | |
7318 | or not? We can't tell which thread it was in non-stop, | |
7319 | so just ignore this. */ | |
7320 | warning (_("Remote failure reply: %s"), rs->buf); | |
7321 | break; | |
7322 | case 'O': /* Console output. */ | |
7323 | remote_console_output (rs->buf + 1); | |
7324 | break; | |
7325 | default: | |
7326 | warning (_("Invalid remote reply: %s"), rs->buf); | |
7327 | break; | |
7328 | } | |
7329 | ||
7330 | /* Acknowledge a pending stop reply that may have arrived in the | |
7331 | mean time. */ | |
7332 | if (rs->notif_state->pending_event[notif_client_stop.id] != NULL) | |
7333 | remote_notif_get_pending_events (¬if_client_stop); | |
7334 | ||
7335 | /* If indeed we noticed a stop reply, we're done. */ | |
7336 | stop_reply = queued_stop_reply (ptid); | |
7337 | if (stop_reply != NULL) | |
7338 | return process_stop_reply (stop_reply, status); | |
7339 | ||
7340 | /* Still no event. If we're just polling for an event, then | |
7341 | return to the event loop. */ | |
7342 | if (options & TARGET_WNOHANG) | |
7343 | { | |
7344 | status->kind = TARGET_WAITKIND_IGNORE; | |
7345 | return minus_one_ptid; | |
7346 | } | |
7347 | ||
7348 | /* Otherwise do a blocking wait. */ | |
7349 | ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size, | |
7350 | 1 /* forever */, &is_notif); | |
7351 | } | |
7352 | } | |
7353 | ||
7354 | /* Wait until the remote machine stops, then return, storing status in | |
7355 | STATUS just as `wait' would. */ | |
7356 | ||
7357 | static ptid_t | |
7358 | remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options) | |
7359 | { | |
7360 | struct remote_state *rs = get_remote_state (); | |
7361 | ptid_t event_ptid = null_ptid; | |
7362 | char *buf; | |
7363 | struct stop_reply *stop_reply; | |
7364 | ||
7365 | again: | |
7366 | ||
7367 | status->kind = TARGET_WAITKIND_IGNORE; | |
7368 | status->value.integer = 0; | |
7369 | ||
7370 | stop_reply = queued_stop_reply (ptid); | |
7371 | if (stop_reply != NULL) | |
7372 | return process_stop_reply (stop_reply, status); | |
7373 | ||
7374 | if (rs->cached_wait_status) | |
7375 | /* Use the cached wait status, but only once. */ | |
7376 | rs->cached_wait_status = 0; | |
7377 | else | |
7378 | { | |
7379 | int ret; | |
7380 | int is_notif; | |
7381 | int forever = ((options & TARGET_WNOHANG) == 0 | |
7382 | && wait_forever_enabled_p); | |
7383 | ||
7384 | if (!rs->waiting_for_stop_reply) | |
7385 | { | |
7386 | status->kind = TARGET_WAITKIND_NO_RESUMED; | |
7387 | return minus_one_ptid; | |
7388 | } | |
7389 | ||
7390 | /* FIXME: cagney/1999-09-27: If we're in async mode we should | |
7391 | _never_ wait for ever -> test on target_is_async_p(). | |
7392 | However, before we do that we need to ensure that the caller | |
7393 | knows how to take the target into/out of async mode. */ | |
7394 | ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size, | |
7395 | forever, &is_notif); | |
7396 | ||
7397 | /* GDB gets a notification. Return to core as this event is | |
7398 | not interesting. */ | |
7399 | if (ret != -1 && is_notif) | |
7400 | return minus_one_ptid; | |
7401 | ||
7402 | if (ret == -1 && (options & TARGET_WNOHANG) != 0) | |
7403 | return minus_one_ptid; | |
7404 | } | |
7405 | ||
7406 | buf = rs->buf; | |
7407 | ||
7408 | /* Assume that the target has acknowledged Ctrl-C unless we receive | |
7409 | an 'F' or 'O' packet. */ | |
7410 | if (buf[0] != 'F' && buf[0] != 'O') | |
7411 | rs->ctrlc_pending_p = 0; | |
7412 | ||
7413 | switch (buf[0]) | |
7414 | { | |
7415 | case 'E': /* Error of some sort. */ | |
7416 | /* We're out of sync with the target now. Did it continue or | |
7417 | not? Not is more likely, so report a stop. */ | |
7418 | rs->waiting_for_stop_reply = 0; | |
7419 | ||
7420 | warning (_("Remote failure reply: %s"), buf); | |
7421 | status->kind = TARGET_WAITKIND_STOPPED; | |
7422 | status->value.sig = GDB_SIGNAL_0; | |
7423 | break; | |
7424 | case 'F': /* File-I/O request. */ | |
7425 | /* GDB may access the inferior memory while handling the File-I/O | |
7426 | request, but we don't want GDB accessing memory while waiting | |
7427 | for a stop reply. See the comments in putpkt_binary. Set | |
7428 | waiting_for_stop_reply to 0 temporarily. */ | |
7429 | rs->waiting_for_stop_reply = 0; | |
7430 | remote_fileio_request (buf, rs->ctrlc_pending_p); | |
7431 | rs->ctrlc_pending_p = 0; | |
7432 | /* GDB handled the File-I/O request, and the target is running | |
7433 | again. Keep waiting for events. */ | |
7434 | rs->waiting_for_stop_reply = 1; | |
7435 | break; | |
7436 | case 'N': case 'T': case 'S': case 'X': case 'W': | |
7437 | { | |
7438 | struct stop_reply *stop_reply; | |
7439 | ||
7440 | /* There is a stop reply to handle. */ | |
7441 | rs->waiting_for_stop_reply = 0; | |
7442 | ||
7443 | stop_reply | |
7444 | = (struct stop_reply *) remote_notif_parse (¬if_client_stop, | |
7445 | rs->buf); | |
7446 | ||
7447 | event_ptid = process_stop_reply (stop_reply, status); | |
7448 | break; | |
7449 | } | |
7450 | case 'O': /* Console output. */ | |
7451 | remote_console_output (buf + 1); | |
7452 | break; | |
7453 | case '\0': | |
7454 | if (rs->last_sent_signal != GDB_SIGNAL_0) | |
7455 | { | |
7456 | /* Zero length reply means that we tried 'S' or 'C' and the | |
7457 | remote system doesn't support it. */ | |
7458 | target_terminal::ours_for_output (); | |
7459 | printf_filtered | |
7460 | ("Can't send signals to this remote system. %s not sent.\n", | |
7461 | gdb_signal_to_name (rs->last_sent_signal)); | |
7462 | rs->last_sent_signal = GDB_SIGNAL_0; | |
7463 | target_terminal::inferior (); | |
7464 | ||
7465 | strcpy (buf, rs->last_sent_step ? "s" : "c"); | |
7466 | putpkt (buf); | |
7467 | break; | |
7468 | } | |
7469 | /* else fallthrough */ | |
7470 | default: | |
7471 | warning (_("Invalid remote reply: %s"), buf); | |
7472 | break; | |
7473 | } | |
7474 | ||
7475 | if (status->kind == TARGET_WAITKIND_NO_RESUMED) | |
7476 | return minus_one_ptid; | |
7477 | else if (status->kind == TARGET_WAITKIND_IGNORE) | |
7478 | { | |
7479 | /* Nothing interesting happened. If we're doing a non-blocking | |
7480 | poll, we're done. Otherwise, go back to waiting. */ | |
7481 | if (options & TARGET_WNOHANG) | |
7482 | return minus_one_ptid; | |
7483 | else | |
7484 | goto again; | |
7485 | } | |
7486 | else if (status->kind != TARGET_WAITKIND_EXITED | |
7487 | && status->kind != TARGET_WAITKIND_SIGNALLED) | |
7488 | { | |
7489 | if (!ptid_equal (event_ptid, null_ptid)) | |
7490 | record_currthread (rs, event_ptid); | |
7491 | else | |
7492 | event_ptid = inferior_ptid; | |
7493 | } | |
7494 | else | |
7495 | /* A process exit. Invalidate our notion of current thread. */ | |
7496 | record_currthread (rs, minus_one_ptid); | |
7497 | ||
7498 | return event_ptid; | |
7499 | } | |
7500 | ||
7501 | /* Wait until the remote machine stops, then return, storing status in | |
7502 | STATUS just as `wait' would. */ | |
7503 | ||
7504 | static ptid_t | |
7505 | remote_wait (struct target_ops *ops, | |
7506 | ptid_t ptid, struct target_waitstatus *status, int options) | |
7507 | { | |
7508 | ptid_t event_ptid; | |
7509 | ||
7510 | if (target_is_non_stop_p ()) | |
7511 | event_ptid = remote_wait_ns (ptid, status, options); | |
7512 | else | |
7513 | event_ptid = remote_wait_as (ptid, status, options); | |
7514 | ||
7515 | if (target_is_async_p ()) | |
7516 | { | |
7517 | /* If there are are events left in the queue tell the event loop | |
7518 | to return here. */ | |
7519 | if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue)) | |
7520 | mark_async_event_handler (remote_async_inferior_event_token); | |
7521 | } | |
7522 | ||
7523 | return event_ptid; | |
7524 | } | |
7525 | ||
7526 | /* Fetch a single register using a 'p' packet. */ | |
7527 | ||
7528 | static int | |
7529 | fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg) | |
7530 | { | |
7531 | struct gdbarch *gdbarch = regcache->arch (); | |
7532 | struct remote_state *rs = get_remote_state (); | |
7533 | char *buf, *p; | |
7534 | gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum)); | |
7535 | int i; | |
7536 | ||
7537 | if (packet_support (PACKET_p) == PACKET_DISABLE) | |
7538 | return 0; | |
7539 | ||
7540 | if (reg->pnum == -1) | |
7541 | return 0; | |
7542 | ||
7543 | p = rs->buf; | |
7544 | *p++ = 'p'; | |
7545 | p += hexnumstr (p, reg->pnum); | |
7546 | *p++ = '\0'; | |
7547 | putpkt (rs->buf); | |
7548 | getpkt (&rs->buf, &rs->buf_size, 0); | |
7549 | ||
7550 | buf = rs->buf; | |
7551 | ||
7552 | switch (packet_ok (buf, &remote_protocol_packets[PACKET_p])) | |
7553 | { | |
7554 | case PACKET_OK: | |
7555 | break; | |
7556 | case PACKET_UNKNOWN: | |
7557 | return 0; | |
7558 | case PACKET_ERROR: | |
7559 | error (_("Could not fetch register \"%s\"; remote failure reply '%s'"), | |
7560 | gdbarch_register_name (regcache->arch (), | |
7561 | reg->regnum), | |
7562 | buf); | |
7563 | } | |
7564 | ||
7565 | /* If this register is unfetchable, tell the regcache. */ | |
7566 | if (buf[0] == 'x') | |
7567 | { | |
7568 | regcache_raw_supply (regcache, reg->regnum, NULL); | |
7569 | return 1; | |
7570 | } | |
7571 | ||
7572 | /* Otherwise, parse and supply the value. */ | |
7573 | p = buf; | |
7574 | i = 0; | |
7575 | while (p[0] != 0) | |
7576 | { | |
7577 | if (p[1] == 0) | |
7578 | error (_("fetch_register_using_p: early buf termination")); | |
7579 | ||
7580 | regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]); | |
7581 | p += 2; | |
7582 | } | |
7583 | regcache_raw_supply (regcache, reg->regnum, regp); | |
7584 | return 1; | |
7585 | } | |
7586 | ||
7587 | /* Fetch the registers included in the target's 'g' packet. */ | |
7588 | ||
7589 | static int | |
7590 | send_g_packet (void) | |
7591 | { | |
7592 | struct remote_state *rs = get_remote_state (); | |
7593 | int buf_len; | |
7594 | ||
7595 | xsnprintf (rs->buf, get_remote_packet_size (), "g"); | |
7596 | remote_send (&rs->buf, &rs->buf_size); | |
7597 | ||
7598 | /* We can get out of synch in various cases. If the first character | |
7599 | in the buffer is not a hex character, assume that has happened | |
7600 | and try to fetch another packet to read. */ | |
7601 | while ((rs->buf[0] < '0' || rs->buf[0] > '9') | |
7602 | && (rs->buf[0] < 'A' || rs->buf[0] > 'F') | |
7603 | && (rs->buf[0] < 'a' || rs->buf[0] > 'f') | |
7604 | && rs->buf[0] != 'x') /* New: unavailable register value. */ | |
7605 | { | |
7606 | if (remote_debug) | |
7607 | fprintf_unfiltered (gdb_stdlog, | |
7608 | "Bad register packet; fetching a new packet\n"); | |
7609 | getpkt (&rs->buf, &rs->buf_size, 0); | |
7610 | } | |
7611 | ||
7612 | buf_len = strlen (rs->buf); | |
7613 | ||
7614 | /* Sanity check the received packet. */ | |
7615 | if (buf_len % 2 != 0) | |
7616 | error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf); | |
7617 | ||
7618 | return buf_len / 2; | |
7619 | } | |
7620 | ||
7621 | static void | |
7622 | process_g_packet (struct regcache *regcache) | |
7623 | { | |
7624 | struct gdbarch *gdbarch = regcache->arch (); | |
7625 | struct remote_state *rs = get_remote_state (); | |
7626 | remote_arch_state *rsa = get_remote_arch_state (gdbarch); | |
7627 | int i, buf_len; | |
7628 | char *p; | |
7629 | char *regs; | |
7630 | ||
7631 | buf_len = strlen (rs->buf); | |
7632 | ||
7633 | /* Further sanity checks, with knowledge of the architecture. */ | |
7634 | if (buf_len > 2 * rsa->sizeof_g_packet) | |
7635 | error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d " | |
7636 | "bytes): %s"), rsa->sizeof_g_packet, buf_len / 2, rs->buf); | |
7637 | ||
7638 | /* Save the size of the packet sent to us by the target. It is used | |
7639 | as a heuristic when determining the max size of packets that the | |
7640 | target can safely receive. */ | |
7641 | if (rsa->actual_register_packet_size == 0) | |
7642 | rsa->actual_register_packet_size = buf_len; | |
7643 | ||
7644 | /* If this is smaller than we guessed the 'g' packet would be, | |
7645 | update our records. A 'g' reply that doesn't include a register's | |
7646 | value implies either that the register is not available, or that | |
7647 | the 'p' packet must be used. */ | |
7648 | if (buf_len < 2 * rsa->sizeof_g_packet) | |
7649 | { | |
7650 | long sizeof_g_packet = buf_len / 2; | |
7651 | ||
7652 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) | |
7653 | { | |
7654 | long offset = rsa->regs[i].offset; | |
7655 | long reg_size = register_size (gdbarch, i); | |
7656 | ||
7657 | if (rsa->regs[i].pnum == -1) | |
7658 | continue; | |
7659 | ||
7660 | if (offset >= sizeof_g_packet) | |
7661 | rsa->regs[i].in_g_packet = 0; | |
7662 | else if (offset + reg_size > sizeof_g_packet) | |
7663 | error (_("Truncated register %d in remote 'g' packet"), i); | |
7664 | else | |
7665 | rsa->regs[i].in_g_packet = 1; | |
7666 | } | |
7667 | ||
7668 | /* Looks valid enough, we can assume this is the correct length | |
7669 | for a 'g' packet. It's important not to adjust | |
7670 | rsa->sizeof_g_packet if we have truncated registers otherwise | |
7671 | this "if" won't be run the next time the method is called | |
7672 | with a packet of the same size and one of the internal errors | |
7673 | below will trigger instead. */ | |
7674 | rsa->sizeof_g_packet = sizeof_g_packet; | |
7675 | } | |
7676 | ||
7677 | regs = (char *) alloca (rsa->sizeof_g_packet); | |
7678 | ||
7679 | /* Unimplemented registers read as all bits zero. */ | |
7680 | memset (regs, 0, rsa->sizeof_g_packet); | |
7681 | ||
7682 | /* Reply describes registers byte by byte, each byte encoded as two | |
7683 | hex characters. Suck them all up, then supply them to the | |
7684 | register cacheing/storage mechanism. */ | |
7685 | ||
7686 | p = rs->buf; | |
7687 | for (i = 0; i < rsa->sizeof_g_packet; i++) | |
7688 | { | |
7689 | if (p[0] == 0 || p[1] == 0) | |
7690 | /* This shouldn't happen - we adjusted sizeof_g_packet above. */ | |
7691 | internal_error (__FILE__, __LINE__, | |
7692 | _("unexpected end of 'g' packet reply")); | |
7693 | ||
7694 | if (p[0] == 'x' && p[1] == 'x') | |
7695 | regs[i] = 0; /* 'x' */ | |
7696 | else | |
7697 | regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); | |
7698 | p += 2; | |
7699 | } | |
7700 | ||
7701 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) | |
7702 | { | |
7703 | struct packet_reg *r = &rsa->regs[i]; | |
7704 | long reg_size = register_size (gdbarch, i); | |
7705 | ||
7706 | if (r->in_g_packet) | |
7707 | { | |
7708 | if ((r->offset + reg_size) * 2 > strlen (rs->buf)) | |
7709 | /* This shouldn't happen - we adjusted in_g_packet above. */ | |
7710 | internal_error (__FILE__, __LINE__, | |
7711 | _("unexpected end of 'g' packet reply")); | |
7712 | else if (rs->buf[r->offset * 2] == 'x') | |
7713 | { | |
7714 | gdb_assert (r->offset * 2 < strlen (rs->buf)); | |
7715 | /* The register isn't available, mark it as such (at | |
7716 | the same time setting the value to zero). */ | |
7717 | regcache_raw_supply (regcache, r->regnum, NULL); | |
7718 | } | |
7719 | else | |
7720 | regcache_raw_supply (regcache, r->regnum, | |
7721 | regs + r->offset); | |
7722 | } | |
7723 | } | |
7724 | } | |
7725 | ||
7726 | static void | |
7727 | fetch_registers_using_g (struct regcache *regcache) | |
7728 | { | |
7729 | send_g_packet (); | |
7730 | process_g_packet (regcache); | |
7731 | } | |
7732 | ||
7733 | /* Make the remote selected traceframe match GDB's selected | |
7734 | traceframe. */ | |
7735 | ||
7736 | static void | |
7737 | set_remote_traceframe (void) | |
7738 | { | |
7739 | int newnum; | |
7740 | struct remote_state *rs = get_remote_state (); | |
7741 | ||
7742 | if (rs->remote_traceframe_number == get_traceframe_number ()) | |
7743 | return; | |
7744 | ||
7745 | /* Avoid recursion, remote_trace_find calls us again. */ | |
7746 | rs->remote_traceframe_number = get_traceframe_number (); | |
7747 | ||
7748 | newnum = target_trace_find (tfind_number, | |
7749 | get_traceframe_number (), 0, 0, NULL); | |
7750 | ||
7751 | /* Should not happen. If it does, all bets are off. */ | |
7752 | if (newnum != get_traceframe_number ()) | |
7753 | warning (_("could not set remote traceframe")); | |
7754 | } | |
7755 | ||
7756 | static void | |
7757 | remote_fetch_registers (struct target_ops *ops, | |
7758 | struct regcache *regcache, int regnum) | |
7759 | { | |
7760 | struct gdbarch *gdbarch = regcache->arch (); | |
7761 | remote_arch_state *rsa = get_remote_arch_state (gdbarch); | |
7762 | int i; | |
7763 | ||
7764 | set_remote_traceframe (); | |
7765 | set_general_thread (regcache_get_ptid (regcache)); | |
7766 | ||
7767 | if (regnum >= 0) | |
7768 | { | |
7769 | packet_reg *reg = packet_reg_from_regnum (gdbarch, rsa, regnum); | |
7770 | ||
7771 | gdb_assert (reg != NULL); | |
7772 | ||
7773 | /* If this register might be in the 'g' packet, try that first - | |
7774 | we are likely to read more than one register. If this is the | |
7775 | first 'g' packet, we might be overly optimistic about its | |
7776 | contents, so fall back to 'p'. */ | |
7777 | if (reg->in_g_packet) | |
7778 | { | |
7779 | fetch_registers_using_g (regcache); | |
7780 | if (reg->in_g_packet) | |
7781 | return; | |
7782 | } | |
7783 | ||
7784 | if (fetch_register_using_p (regcache, reg)) | |
7785 | return; | |
7786 | ||
7787 | /* This register is not available. */ | |
7788 | regcache_raw_supply (regcache, reg->regnum, NULL); | |
7789 | ||
7790 | return; | |
7791 | } | |
7792 | ||
7793 | fetch_registers_using_g (regcache); | |
7794 | ||
7795 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) | |
7796 | if (!rsa->regs[i].in_g_packet) | |
7797 | if (!fetch_register_using_p (regcache, &rsa->regs[i])) | |
7798 | { | |
7799 | /* This register is not available. */ | |
7800 | regcache_raw_supply (regcache, i, NULL); | |
7801 | } | |
7802 | } | |
7803 | ||
7804 | /* Prepare to store registers. Since we may send them all (using a | |
7805 | 'G' request), we have to read out the ones we don't want to change | |
7806 | first. */ | |
7807 | ||
7808 | static void | |
7809 | remote_prepare_to_store (struct target_ops *self, struct regcache *regcache) | |
7810 | { | |
7811 | remote_arch_state *rsa = get_remote_arch_state (regcache->arch ()); | |
7812 | int i; | |
7813 | ||
7814 | /* Make sure the entire registers array is valid. */ | |
7815 | switch (packet_support (PACKET_P)) | |
7816 | { | |
7817 | case PACKET_DISABLE: | |
7818 | case PACKET_SUPPORT_UNKNOWN: | |
7819 | /* Make sure all the necessary registers are cached. */ | |
7820 | for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++) | |
7821 | if (rsa->regs[i].in_g_packet) | |
7822 | regcache_raw_update (regcache, rsa->regs[i].regnum); | |
7823 | break; | |
7824 | case PACKET_ENABLE: | |
7825 | break; | |
7826 | } | |
7827 | } | |
7828 | ||
7829 | /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF | |
7830 | packet was not recognized. */ | |
7831 | ||
7832 | static int | |
7833 | store_register_using_P (const struct regcache *regcache, | |
7834 | struct packet_reg *reg) | |
7835 | { | |
7836 | struct gdbarch *gdbarch = regcache->arch (); | |
7837 | struct remote_state *rs = get_remote_state (); | |
7838 | /* Try storing a single register. */ | |
7839 | char *buf = rs->buf; | |
7840 | gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum)); | |
7841 | char *p; | |
7842 | ||
7843 | if (packet_support (PACKET_P) == PACKET_DISABLE) | |
7844 | return 0; | |
7845 | ||
7846 | if (reg->pnum == -1) | |
7847 | return 0; | |
7848 | ||
7849 | xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0)); | |
7850 | p = buf + strlen (buf); | |
7851 | regcache_raw_collect (regcache, reg->regnum, regp); | |
7852 | bin2hex (regp, p, register_size (gdbarch, reg->regnum)); | |
7853 | putpkt (rs->buf); | |
7854 | getpkt (&rs->buf, &rs->buf_size, 0); | |
7855 | ||
7856 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P])) | |
7857 | { | |
7858 | case PACKET_OK: | |
7859 | return 1; | |
7860 | case PACKET_ERROR: | |
7861 | error (_("Could not write register \"%s\"; remote failure reply '%s'"), | |
7862 | gdbarch_register_name (gdbarch, reg->regnum), rs->buf); | |
7863 | case PACKET_UNKNOWN: | |
7864 | return 0; | |
7865 | default: | |
7866 | internal_error (__FILE__, __LINE__, _("Bad result from packet_ok")); | |
7867 | } | |
7868 | } | |
7869 | ||
7870 | /* Store register REGNUM, or all registers if REGNUM == -1, from the | |
7871 | contents of the register cache buffer. FIXME: ignores errors. */ | |
7872 | ||
7873 | static void | |
7874 | store_registers_using_G (const struct regcache *regcache) | |
7875 | { | |
7876 | struct remote_state *rs = get_remote_state (); | |
7877 | remote_arch_state *rsa = get_remote_arch_state (regcache->arch ()); | |
7878 | gdb_byte *regs; | |
7879 | char *p; | |
7880 | ||
7881 | /* Extract all the registers in the regcache copying them into a | |
7882 | local buffer. */ | |
7883 | { | |
7884 | int i; | |
7885 | ||
7886 | regs = (gdb_byte *) alloca (rsa->sizeof_g_packet); | |
7887 | memset (regs, 0, rsa->sizeof_g_packet); | |
7888 | for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++) | |
7889 | { | |
7890 | struct packet_reg *r = &rsa->regs[i]; | |
7891 | ||
7892 | if (r->in_g_packet) | |
7893 | regcache_raw_collect (regcache, r->regnum, regs + r->offset); | |
7894 | } | |
7895 | } | |
7896 | ||
7897 | /* Command describes registers byte by byte, | |
7898 | each byte encoded as two hex characters. */ | |
7899 | p = rs->buf; | |
7900 | *p++ = 'G'; | |
7901 | bin2hex (regs, p, rsa->sizeof_g_packet); | |
7902 | putpkt (rs->buf); | |
7903 | getpkt (&rs->buf, &rs->buf_size, 0); | |
7904 | if (packet_check_result (rs->buf) == PACKET_ERROR) | |
7905 | error (_("Could not write registers; remote failure reply '%s'"), | |
7906 | rs->buf); | |
7907 | } | |
7908 | ||
7909 | /* Store register REGNUM, or all registers if REGNUM == -1, from the contents | |
7910 | of the register cache buffer. FIXME: ignores errors. */ | |
7911 | ||
7912 | static void | |
7913 | remote_store_registers (struct target_ops *ops, | |
7914 | struct regcache *regcache, int regnum) | |
7915 | { | |
7916 | struct gdbarch *gdbarch = regcache->arch (); | |
7917 | remote_arch_state *rsa = get_remote_arch_state (gdbarch); | |
7918 | int i; | |
7919 | ||
7920 | set_remote_traceframe (); | |
7921 | set_general_thread (regcache_get_ptid (regcache)); | |
7922 | ||
7923 | if (regnum >= 0) | |
7924 | { | |
7925 | packet_reg *reg = packet_reg_from_regnum (gdbarch, rsa, regnum); | |
7926 | ||
7927 | gdb_assert (reg != NULL); | |
7928 | ||
7929 | /* Always prefer to store registers using the 'P' packet if | |
7930 | possible; we often change only a small number of registers. | |
7931 | Sometimes we change a larger number; we'd need help from a | |
7932 | higher layer to know to use 'G'. */ | |
7933 | if (store_register_using_P (regcache, reg)) | |
7934 | return; | |
7935 | ||
7936 | /* For now, don't complain if we have no way to write the | |
7937 | register. GDB loses track of unavailable registers too | |
7938 | easily. Some day, this may be an error. We don't have | |
7939 | any way to read the register, either... */ | |
7940 | if (!reg->in_g_packet) | |
7941 | return; | |
7942 | ||
7943 | store_registers_using_G (regcache); | |
7944 | return; | |
7945 | } | |
7946 | ||
7947 | store_registers_using_G (regcache); | |
7948 | ||
7949 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) | |
7950 | if (!rsa->regs[i].in_g_packet) | |
7951 | if (!store_register_using_P (regcache, &rsa->regs[i])) | |
7952 | /* See above for why we do not issue an error here. */ | |
7953 | continue; | |
7954 | } | |
7955 | \f | |
7956 | ||
7957 | /* Return the number of hex digits in num. */ | |
7958 | ||
7959 | static int | |
7960 | hexnumlen (ULONGEST num) | |
7961 | { | |
7962 | int i; | |
7963 | ||
7964 | for (i = 0; num != 0; i++) | |
7965 | num >>= 4; | |
7966 | ||
7967 | return std::max (i, 1); | |
7968 | } | |
7969 | ||
7970 | /* Set BUF to the minimum number of hex digits representing NUM. */ | |
7971 | ||
7972 | static int | |
7973 | hexnumstr (char *buf, ULONGEST num) | |
7974 | { | |
7975 | int len = hexnumlen (num); | |
7976 | ||
7977 | return hexnumnstr (buf, num, len); | |
7978 | } | |
7979 | ||
7980 | ||
7981 | /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */ | |
7982 | ||
7983 | static int | |
7984 | hexnumnstr (char *buf, ULONGEST num, int width) | |
7985 | { | |
7986 | int i; | |
7987 | ||
7988 | buf[width] = '\0'; | |
7989 | ||
7990 | for (i = width - 1; i >= 0; i--) | |
7991 | { | |
7992 | buf[i] = "0123456789abcdef"[(num & 0xf)]; | |
7993 | num >>= 4; | |
7994 | } | |
7995 | ||
7996 | return width; | |
7997 | } | |
7998 | ||
7999 | /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */ | |
8000 | ||
8001 | static CORE_ADDR | |
8002 | remote_address_masked (CORE_ADDR addr) | |
8003 | { | |
8004 | unsigned int address_size = remote_address_size; | |
8005 | ||
8006 | /* If "remoteaddresssize" was not set, default to target address size. */ | |
8007 | if (!address_size) | |
8008 | address_size = gdbarch_addr_bit (target_gdbarch ()); | |
8009 | ||
8010 | if (address_size > 0 | |
8011 | && address_size < (sizeof (ULONGEST) * 8)) | |
8012 | { | |
8013 | /* Only create a mask when that mask can safely be constructed | |
8014 | in a ULONGEST variable. */ | |
8015 | ULONGEST mask = 1; | |
8016 | ||
8017 | mask = (mask << address_size) - 1; | |
8018 | addr &= mask; | |
8019 | } | |
8020 | return addr; | |
8021 | } | |
8022 | ||
8023 | /* Determine whether the remote target supports binary downloading. | |
8024 | This is accomplished by sending a no-op memory write of zero length | |
8025 | to the target at the specified address. It does not suffice to send | |
8026 | the whole packet, since many stubs strip the eighth bit and | |
8027 | subsequently compute a wrong checksum, which causes real havoc with | |
8028 | remote_write_bytes. | |
8029 | ||
8030 | NOTE: This can still lose if the serial line is not eight-bit | |
8031 | clean. In cases like this, the user should clear "remote | |
8032 | X-packet". */ | |
8033 | ||
8034 | static void | |
8035 | check_binary_download (CORE_ADDR addr) | |
8036 | { | |
8037 | struct remote_state *rs = get_remote_state (); | |
8038 | ||
8039 | switch (packet_support (PACKET_X)) | |
8040 | { | |
8041 | case PACKET_DISABLE: | |
8042 | break; | |
8043 | case PACKET_ENABLE: | |
8044 | break; | |
8045 | case PACKET_SUPPORT_UNKNOWN: | |
8046 | { | |
8047 | char *p; | |
8048 | ||
8049 | p = rs->buf; | |
8050 | *p++ = 'X'; | |
8051 | p += hexnumstr (p, (ULONGEST) addr); | |
8052 | *p++ = ','; | |
8053 | p += hexnumstr (p, (ULONGEST) 0); | |
8054 | *p++ = ':'; | |
8055 | *p = '\0'; | |
8056 | ||
8057 | putpkt_binary (rs->buf, (int) (p - rs->buf)); | |
8058 | getpkt (&rs->buf, &rs->buf_size, 0); | |
8059 | ||
8060 | if (rs->buf[0] == '\0') | |
8061 | { | |
8062 | if (remote_debug) | |
8063 | fprintf_unfiltered (gdb_stdlog, | |
8064 | "binary downloading NOT " | |
8065 | "supported by target\n"); | |
8066 | remote_protocol_packets[PACKET_X].support = PACKET_DISABLE; | |
8067 | } | |
8068 | else | |
8069 | { | |
8070 | if (remote_debug) | |
8071 | fprintf_unfiltered (gdb_stdlog, | |
8072 | "binary downloading supported by target\n"); | |
8073 | remote_protocol_packets[PACKET_X].support = PACKET_ENABLE; | |
8074 | } | |
8075 | break; | |
8076 | } | |
8077 | } | |
8078 | } | |
8079 | ||
8080 | /* Helper function to resize the payload in order to try to get a good | |
8081 | alignment. We try to write an amount of data such that the next write will | |
8082 | start on an address aligned on REMOTE_ALIGN_WRITES. */ | |
8083 | ||
8084 | static int | |
8085 | align_for_efficient_write (int todo, CORE_ADDR memaddr) | |
8086 | { | |
8087 | return ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr; | |
8088 | } | |
8089 | ||
8090 | /* Write memory data directly to the remote machine. | |
8091 | This does not inform the data cache; the data cache uses this. | |
8092 | HEADER is the starting part of the packet. | |
8093 | MEMADDR is the address in the remote memory space. | |
8094 | MYADDR is the address of the buffer in our space. | |
8095 | LEN_UNITS is the number of addressable units to write. | |
8096 | UNIT_SIZE is the length in bytes of an addressable unit. | |
8097 | PACKET_FORMAT should be either 'X' or 'M', and indicates if we | |
8098 | should send data as binary ('X'), or hex-encoded ('M'). | |
8099 | ||
8100 | The function creates packet of the form | |
8101 | <HEADER><ADDRESS>,<LENGTH>:<DATA> | |
8102 | ||
8103 | where encoding of <DATA> is terminated by PACKET_FORMAT. | |
8104 | ||
8105 | If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma | |
8106 | are omitted. | |
8107 | ||
8108 | Return the transferred status, error or OK (an | |
8109 | 'enum target_xfer_status' value). Save the number of addressable units | |
8110 | transferred in *XFERED_LEN_UNITS. Only transfer a single packet. | |
8111 | ||
8112 | On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an | |
8113 | exchange between gdb and the stub could look like (?? in place of the | |
8114 | checksum): | |
8115 | ||
8116 | -> $m1000,4#?? | |
8117 | <- aaaabbbbccccdddd | |
8118 | ||
8119 | -> $M1000,3:eeeeffffeeee#?? | |
8120 | <- OK | |
8121 | ||
8122 | -> $m1000,4#?? | |
8123 | <- eeeeffffeeeedddd */ | |
8124 | ||
8125 | static enum target_xfer_status | |
8126 | remote_write_bytes_aux (const char *header, CORE_ADDR memaddr, | |
8127 | const gdb_byte *myaddr, ULONGEST len_units, | |
8128 | int unit_size, ULONGEST *xfered_len_units, | |
8129 | char packet_format, int use_length) | |
8130 | { | |
8131 | struct remote_state *rs = get_remote_state (); | |
8132 | char *p; | |
8133 | char *plen = NULL; | |
8134 | int plenlen = 0; | |
8135 | int todo_units; | |
8136 | int units_written; | |
8137 | int payload_capacity_bytes; | |
8138 | int payload_length_bytes; | |
8139 | ||
8140 | if (packet_format != 'X' && packet_format != 'M') | |
8141 | internal_error (__FILE__, __LINE__, | |
8142 | _("remote_write_bytes_aux: bad packet format")); | |
8143 | ||
8144 | if (len_units == 0) | |
8145 | return TARGET_XFER_EOF; | |
8146 | ||
8147 | payload_capacity_bytes = get_memory_write_packet_size (); | |
8148 | ||
8149 | /* The packet buffer will be large enough for the payload; | |
8150 | get_memory_packet_size ensures this. */ | |
8151 | rs->buf[0] = '\0'; | |
8152 | ||
8153 | /* Compute the size of the actual payload by subtracting out the | |
8154 | packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */ | |
8155 | ||
8156 | payload_capacity_bytes -= strlen ("$,:#NN"); | |
8157 | if (!use_length) | |
8158 | /* The comma won't be used. */ | |
8159 | payload_capacity_bytes += 1; | |
8160 | payload_capacity_bytes -= strlen (header); | |
8161 | payload_capacity_bytes -= hexnumlen (memaddr); | |
8162 | ||
8163 | /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */ | |
8164 | ||
8165 | strcat (rs->buf, header); | |
8166 | p = rs->buf + strlen (header); | |
8167 | ||
8168 | /* Compute a best guess of the number of bytes actually transfered. */ | |
8169 | if (packet_format == 'X') | |
8170 | { | |
8171 | /* Best guess at number of bytes that will fit. */ | |
8172 | todo_units = std::min (len_units, | |
8173 | (ULONGEST) payload_capacity_bytes / unit_size); | |
8174 | if (use_length) | |
8175 | payload_capacity_bytes -= hexnumlen (todo_units); | |
8176 | todo_units = std::min (todo_units, payload_capacity_bytes / unit_size); | |
8177 | } | |
8178 | else | |
8179 | { | |
8180 | /* Number of bytes that will fit. */ | |
8181 | todo_units | |
8182 | = std::min (len_units, | |
8183 | (ULONGEST) (payload_capacity_bytes / unit_size) / 2); | |
8184 | if (use_length) | |
8185 | payload_capacity_bytes -= hexnumlen (todo_units); | |
8186 | todo_units = std::min (todo_units, | |
8187 | (payload_capacity_bytes / unit_size) / 2); | |
8188 | } | |
8189 | ||
8190 | if (todo_units <= 0) | |
8191 | internal_error (__FILE__, __LINE__, | |
8192 | _("minimum packet size too small to write data")); | |
8193 | ||
8194 | /* If we already need another packet, then try to align the end | |
8195 | of this packet to a useful boundary. */ | |
8196 | if (todo_units > 2 * REMOTE_ALIGN_WRITES && todo_units < len_units) | |
8197 | todo_units = align_for_efficient_write (todo_units, memaddr); | |
8198 | ||
8199 | /* Append "<memaddr>". */ | |
8200 | memaddr = remote_address_masked (memaddr); | |
8201 | p += hexnumstr (p, (ULONGEST) memaddr); | |
8202 | ||
8203 | if (use_length) | |
8204 | { | |
8205 | /* Append ",". */ | |
8206 | *p++ = ','; | |
8207 | ||
8208 | /* Append the length and retain its location and size. It may need to be | |
8209 | adjusted once the packet body has been created. */ | |
8210 | plen = p; | |
8211 | plenlen = hexnumstr (p, (ULONGEST) todo_units); | |
8212 | p += plenlen; | |
8213 | } | |
8214 | ||
8215 | /* Append ":". */ | |
8216 | *p++ = ':'; | |
8217 | *p = '\0'; | |
8218 | ||
8219 | /* Append the packet body. */ | |
8220 | if (packet_format == 'X') | |
8221 | { | |
8222 | /* Binary mode. Send target system values byte by byte, in | |
8223 | increasing byte addresses. Only escape certain critical | |
8224 | characters. */ | |
8225 | payload_length_bytes = | |
8226 | remote_escape_output (myaddr, todo_units, unit_size, (gdb_byte *) p, | |
8227 | &units_written, payload_capacity_bytes); | |
8228 | ||
8229 | /* If not all TODO units fit, then we'll need another packet. Make | |
8230 | a second try to keep the end of the packet aligned. Don't do | |
8231 | this if the packet is tiny. */ | |
8232 | if (units_written < todo_units && units_written > 2 * REMOTE_ALIGN_WRITES) | |
8233 | { | |
8234 | int new_todo_units; | |
8235 | ||
8236 | new_todo_units = align_for_efficient_write (units_written, memaddr); | |
8237 | ||
8238 | if (new_todo_units != units_written) | |
8239 | payload_length_bytes = | |
8240 | remote_escape_output (myaddr, new_todo_units, unit_size, | |
8241 | (gdb_byte *) p, &units_written, | |
8242 | payload_capacity_bytes); | |
8243 | } | |
8244 | ||
8245 | p += payload_length_bytes; | |
8246 | if (use_length && units_written < todo_units) | |
8247 | { | |
8248 | /* Escape chars have filled up the buffer prematurely, | |
8249 | and we have actually sent fewer units than planned. | |
8250 | Fix-up the length field of the packet. Use the same | |
8251 | number of characters as before. */ | |
8252 | plen += hexnumnstr (plen, (ULONGEST) units_written, | |
8253 | plenlen); | |
8254 | *plen = ':'; /* overwrite \0 from hexnumnstr() */ | |
8255 | } | |
8256 | } | |
8257 | else | |
8258 | { | |
8259 | /* Normal mode: Send target system values byte by byte, in | |
8260 | increasing byte addresses. Each byte is encoded as a two hex | |
8261 | value. */ | |
8262 | p += 2 * bin2hex (myaddr, p, todo_units * unit_size); | |
8263 | units_written = todo_units; | |
8264 | } | |
8265 | ||
8266 | putpkt_binary (rs->buf, (int) (p - rs->buf)); | |
8267 | getpkt (&rs->buf, &rs->buf_size, 0); | |
8268 | ||
8269 | if (rs->buf[0] == 'E') | |
8270 | return TARGET_XFER_E_IO; | |
8271 | ||
8272 | /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to | |
8273 | send fewer units than we'd planned. */ | |
8274 | *xfered_len_units = (ULONGEST) units_written; | |
8275 | return TARGET_XFER_OK; | |
8276 | } | |
8277 | ||
8278 | /* Write memory data directly to the remote machine. | |
8279 | This does not inform the data cache; the data cache uses this. | |
8280 | MEMADDR is the address in the remote memory space. | |
8281 | MYADDR is the address of the buffer in our space. | |
8282 | LEN is the number of bytes. | |
8283 | ||
8284 | Return the transferred status, error or OK (an | |
8285 | 'enum target_xfer_status' value). Save the number of bytes | |
8286 | transferred in *XFERED_LEN. Only transfer a single packet. */ | |
8287 | ||
8288 | static enum target_xfer_status | |
8289 | remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, ULONGEST len, | |
8290 | int unit_size, ULONGEST *xfered_len) | |
8291 | { | |
8292 | const char *packet_format = NULL; | |
8293 | ||
8294 | /* Check whether the target supports binary download. */ | |
8295 | check_binary_download (memaddr); | |
8296 | ||
8297 | switch (packet_support (PACKET_X)) | |
8298 | { | |
8299 | case PACKET_ENABLE: | |
8300 | packet_format = "X"; | |
8301 | break; | |
8302 | case PACKET_DISABLE: | |
8303 | packet_format = "M"; | |
8304 | break; | |
8305 | case PACKET_SUPPORT_UNKNOWN: | |
8306 | internal_error (__FILE__, __LINE__, | |
8307 | _("remote_write_bytes: bad internal state")); | |
8308 | default: | |
8309 | internal_error (__FILE__, __LINE__, _("bad switch")); | |
8310 | } | |
8311 | ||
8312 | return remote_write_bytes_aux (packet_format, | |
8313 | memaddr, myaddr, len, unit_size, xfered_len, | |
8314 | packet_format[0], 1); | |
8315 | } | |
8316 | ||
8317 | /* Read memory data directly from the remote machine. | |
8318 | This does not use the data cache; the data cache uses this. | |
8319 | MEMADDR is the address in the remote memory space. | |
8320 | MYADDR is the address of the buffer in our space. | |
8321 | LEN_UNITS is the number of addressable memory units to read.. | |
8322 | UNIT_SIZE is the length in bytes of an addressable unit. | |
8323 | ||
8324 | Return the transferred status, error or OK (an | |
8325 | 'enum target_xfer_status' value). Save the number of bytes | |
8326 | transferred in *XFERED_LEN_UNITS. | |
8327 | ||
8328 | See the comment of remote_write_bytes_aux for an example of | |
8329 | memory read/write exchange between gdb and the stub. */ | |
8330 | ||
8331 | static enum target_xfer_status | |
8332 | remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr, ULONGEST len_units, | |
8333 | int unit_size, ULONGEST *xfered_len_units) | |
8334 | { | |
8335 | struct remote_state *rs = get_remote_state (); | |
8336 | int buf_size_bytes; /* Max size of packet output buffer. */ | |
8337 | char *p; | |
8338 | int todo_units; | |
8339 | int decoded_bytes; | |
8340 | ||
8341 | buf_size_bytes = get_memory_read_packet_size (); | |
8342 | /* The packet buffer will be large enough for the payload; | |
8343 | get_memory_packet_size ensures this. */ | |
8344 | ||
8345 | /* Number of units that will fit. */ | |
8346 | todo_units = std::min (len_units, | |
8347 | (ULONGEST) (buf_size_bytes / unit_size) / 2); | |
8348 | ||
8349 | /* Construct "m"<memaddr>","<len>". */ | |
8350 | memaddr = remote_address_masked (memaddr); | |
8351 | p = rs->buf; | |
8352 | *p++ = 'm'; | |
8353 | p += hexnumstr (p, (ULONGEST) memaddr); | |
8354 | *p++ = ','; | |
8355 | p += hexnumstr (p, (ULONGEST) todo_units); | |
8356 | *p = '\0'; | |
8357 | putpkt (rs->buf); | |
8358 | getpkt (&rs->buf, &rs->buf_size, 0); | |
8359 | if (rs->buf[0] == 'E' | |
8360 | && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2]) | |
8361 | && rs->buf[3] == '\0') | |
8362 | return TARGET_XFER_E_IO; | |
8363 | /* Reply describes memory byte by byte, each byte encoded as two hex | |
8364 | characters. */ | |
8365 | p = rs->buf; | |
8366 | decoded_bytes = hex2bin (p, myaddr, todo_units * unit_size); | |
8367 | /* Return what we have. Let higher layers handle partial reads. */ | |
8368 | *xfered_len_units = (ULONGEST) (decoded_bytes / unit_size); | |
8369 | return TARGET_XFER_OK; | |
8370 | } | |
8371 | ||
8372 | /* Using the set of read-only target sections of remote, read live | |
8373 | read-only memory. | |
8374 | ||
8375 | For interface/parameters/return description see target.h, | |
8376 | to_xfer_partial. */ | |
8377 | ||
8378 | static enum target_xfer_status | |
8379 | remote_xfer_live_readonly_partial (struct target_ops *ops, gdb_byte *readbuf, | |
8380 | ULONGEST memaddr, ULONGEST len, | |
8381 | int unit_size, ULONGEST *xfered_len) | |
8382 | { | |
8383 | struct target_section *secp; | |
8384 | struct target_section_table *table; | |
8385 | ||
8386 | secp = target_section_by_addr (ops, memaddr); | |
8387 | if (secp != NULL | |
8388 | && (bfd_get_section_flags (secp->the_bfd_section->owner, | |
8389 | secp->the_bfd_section) | |
8390 | & SEC_READONLY)) | |
8391 | { | |
8392 | struct target_section *p; | |
8393 | ULONGEST memend = memaddr + len; | |
8394 | ||
8395 | table = target_get_section_table (ops); | |
8396 | ||
8397 | for (p = table->sections; p < table->sections_end; p++) | |
8398 | { | |
8399 | if (memaddr >= p->addr) | |
8400 | { | |
8401 | if (memend <= p->endaddr) | |
8402 | { | |
8403 | /* Entire transfer is within this section. */ | |
8404 | return remote_read_bytes_1 (memaddr, readbuf, len, unit_size, | |
8405 | xfered_len); | |
8406 | } | |
8407 | else if (memaddr >= p->endaddr) | |
8408 | { | |
8409 | /* This section ends before the transfer starts. */ | |
8410 | continue; | |
8411 | } | |
8412 | else | |
8413 | { | |
8414 | /* This section overlaps the transfer. Just do half. */ | |
8415 | len = p->endaddr - memaddr; | |
8416 | return remote_read_bytes_1 (memaddr, readbuf, len, unit_size, | |
8417 | xfered_len); | |
8418 | } | |
8419 | } | |
8420 | } | |
8421 | } | |
8422 | ||
8423 | return TARGET_XFER_EOF; | |
8424 | } | |
8425 | ||
8426 | /* Similar to remote_read_bytes_1, but it reads from the remote stub | |
8427 | first if the requested memory is unavailable in traceframe. | |
8428 | Otherwise, fall back to remote_read_bytes_1. */ | |
8429 | ||
8430 | static enum target_xfer_status | |
8431 | remote_read_bytes (struct target_ops *ops, CORE_ADDR memaddr, | |
8432 | gdb_byte *myaddr, ULONGEST len, int unit_size, | |
8433 | ULONGEST *xfered_len) | |
8434 | { | |
8435 | if (len == 0) | |
8436 | return TARGET_XFER_EOF; | |
8437 | ||
8438 | if (get_traceframe_number () != -1) | |
8439 | { | |
8440 | std::vector<mem_range> available; | |
8441 | ||
8442 | /* If we fail to get the set of available memory, then the | |
8443 | target does not support querying traceframe info, and so we | |
8444 | attempt reading from the traceframe anyway (assuming the | |
8445 | target implements the old QTro packet then). */ | |
8446 | if (traceframe_available_memory (&available, memaddr, len)) | |
8447 | { | |
8448 | if (available.empty () || available[0].start != memaddr) | |
8449 | { | |
8450 | enum target_xfer_status res; | |
8451 | ||
8452 | /* Don't read into the traceframe's available | |
8453 | memory. */ | |
8454 | if (!available.empty ()) | |
8455 | { | |
8456 | LONGEST oldlen = len; | |
8457 | ||
8458 | len = available[0].start - memaddr; | |
8459 | gdb_assert (len <= oldlen); | |
8460 | } | |
8461 | ||
8462 | /* This goes through the topmost target again. */ | |
8463 | res = remote_xfer_live_readonly_partial (ops, myaddr, memaddr, | |
8464 | len, unit_size, xfered_len); | |
8465 | if (res == TARGET_XFER_OK) | |
8466 | return TARGET_XFER_OK; | |
8467 | else | |
8468 | { | |
8469 | /* No use trying further, we know some memory starting | |
8470 | at MEMADDR isn't available. */ | |
8471 | *xfered_len = len; | |
8472 | return TARGET_XFER_UNAVAILABLE; | |
8473 | } | |
8474 | } | |
8475 | ||
8476 | /* Don't try to read more than how much is available, in | |
8477 | case the target implements the deprecated QTro packet to | |
8478 | cater for older GDBs (the target's knowledge of read-only | |
8479 | sections may be outdated by now). */ | |
8480 | len = available[0].length; | |
8481 | } | |
8482 | } | |
8483 | ||
8484 | return remote_read_bytes_1 (memaddr, myaddr, len, unit_size, xfered_len); | |
8485 | } | |
8486 | ||
8487 | \f | |
8488 | ||
8489 | /* Sends a packet with content determined by the printf format string | |
8490 | FORMAT and the remaining arguments, then gets the reply. Returns | |
8491 | whether the packet was a success, a failure, or unknown. */ | |
8492 | ||
8493 | static enum packet_result remote_send_printf (const char *format, ...) | |
8494 | ATTRIBUTE_PRINTF (1, 2); | |
8495 | ||
8496 | static enum packet_result | |
8497 | remote_send_printf (const char *format, ...) | |
8498 | { | |
8499 | struct remote_state *rs = get_remote_state (); | |
8500 | int max_size = get_remote_packet_size (); | |
8501 | va_list ap; | |
8502 | ||
8503 | va_start (ap, format); | |
8504 | ||
8505 | rs->buf[0] = '\0'; | |
8506 | if (vsnprintf (rs->buf, max_size, format, ap) >= max_size) | |
8507 | internal_error (__FILE__, __LINE__, _("Too long remote packet.")); | |
8508 | ||
8509 | if (putpkt (rs->buf) < 0) | |
8510 | error (_("Communication problem with target.")); | |
8511 | ||
8512 | rs->buf[0] = '\0'; | |
8513 | getpkt (&rs->buf, &rs->buf_size, 0); | |
8514 | ||
8515 | return packet_check_result (rs->buf); | |
8516 | } | |
8517 | ||
8518 | /* Flash writing can take quite some time. We'll set | |
8519 | effectively infinite timeout for flash operations. | |
8520 | In future, we'll need to decide on a better approach. */ | |
8521 | static const int remote_flash_timeout = 1000; | |
8522 | ||
8523 | static void | |
8524 | remote_flash_erase (struct target_ops *ops, | |
8525 | ULONGEST address, LONGEST length) | |
8526 | { | |
8527 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; | |
8528 | enum packet_result ret; | |
8529 | scoped_restore restore_timeout | |
8530 | = make_scoped_restore (&remote_timeout, remote_flash_timeout); | |
8531 | ||
8532 | ret = remote_send_printf ("vFlashErase:%s,%s", | |
8533 | phex (address, addr_size), | |
8534 | phex (length, 4)); | |
8535 | switch (ret) | |
8536 | { | |
8537 | case PACKET_UNKNOWN: | |
8538 | error (_("Remote target does not support flash erase")); | |
8539 | case PACKET_ERROR: | |
8540 | error (_("Error erasing flash with vFlashErase packet")); | |
8541 | default: | |
8542 | break; | |
8543 | } | |
8544 | } | |
8545 | ||
8546 | static enum target_xfer_status | |
8547 | remote_flash_write (struct target_ops *ops, ULONGEST address, | |
8548 | ULONGEST length, ULONGEST *xfered_len, | |
8549 | const gdb_byte *data) | |
8550 | { | |
8551 | scoped_restore restore_timeout | |
8552 | = make_scoped_restore (&remote_timeout, remote_flash_timeout); | |
8553 | return remote_write_bytes_aux ("vFlashWrite:", address, data, length, 1, | |
8554 | xfered_len,'X', 0); | |
8555 | } | |
8556 | ||
8557 | static void | |
8558 | remote_flash_done (struct target_ops *ops) | |
8559 | { | |
8560 | int ret; | |
8561 | ||
8562 | scoped_restore restore_timeout | |
8563 | = make_scoped_restore (&remote_timeout, remote_flash_timeout); | |
8564 | ||
8565 | ret = remote_send_printf ("vFlashDone"); | |
8566 | ||
8567 | switch (ret) | |
8568 | { | |
8569 | case PACKET_UNKNOWN: | |
8570 | error (_("Remote target does not support vFlashDone")); | |
8571 | case PACKET_ERROR: | |
8572 | error (_("Error finishing flash operation")); | |
8573 | default: | |
8574 | break; | |
8575 | } | |
8576 | } | |
8577 | ||
8578 | static void | |
8579 | remote_files_info (struct target_ops *ignore) | |
8580 | { | |
8581 | puts_filtered ("Debugging a target over a serial line.\n"); | |
8582 | } | |
8583 | \f | |
8584 | /* Stuff for dealing with the packets which are part of this protocol. | |
8585 | See comment at top of file for details. */ | |
8586 | ||
8587 | /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR | |
8588 | error to higher layers. Called when a serial error is detected. | |
8589 | The exception message is STRING, followed by a colon and a blank, | |
8590 | the system error message for errno at function entry and final dot | |
8591 | for output compatibility with throw_perror_with_name. */ | |
8592 | ||
8593 | static void | |
8594 | unpush_and_perror (const char *string) | |
8595 | { | |
8596 | int saved_errno = errno; | |
8597 | ||
8598 | remote_unpush_target (); | |
8599 | throw_error (TARGET_CLOSE_ERROR, "%s: %s.", string, | |
8600 | safe_strerror (saved_errno)); | |
8601 | } | |
8602 | ||
8603 | /* Read a single character from the remote end. The current quit | |
8604 | handler is overridden to avoid quitting in the middle of packet | |
8605 | sequence, as that would break communication with the remote server. | |
8606 | See remote_serial_quit_handler for more detail. */ | |
8607 | ||
8608 | static int | |
8609 | readchar (int timeout) | |
8610 | { | |
8611 | int ch; | |
8612 | struct remote_state *rs = get_remote_state (); | |
8613 | ||
8614 | { | |
8615 | scoped_restore restore_quit | |
8616 | = make_scoped_restore (&quit_handler, remote_serial_quit_handler); | |
8617 | ||
8618 | rs->got_ctrlc_during_io = 0; | |
8619 | ||
8620 | ch = serial_readchar (rs->remote_desc, timeout); | |
8621 | ||
8622 | if (rs->got_ctrlc_during_io) | |
8623 | set_quit_flag (); | |
8624 | } | |
8625 | ||
8626 | if (ch >= 0) | |
8627 | return ch; | |
8628 | ||
8629 | switch ((enum serial_rc) ch) | |
8630 | { | |
8631 | case SERIAL_EOF: | |
8632 | remote_unpush_target (); | |
8633 | throw_error (TARGET_CLOSE_ERROR, _("Remote connection closed")); | |
8634 | /* no return */ | |
8635 | case SERIAL_ERROR: | |
8636 | unpush_and_perror (_("Remote communication error. " | |
8637 | "Target disconnected.")); | |
8638 | /* no return */ | |
8639 | case SERIAL_TIMEOUT: | |
8640 | break; | |
8641 | } | |
8642 | return ch; | |
8643 | } | |
8644 | ||
8645 | /* Wrapper for serial_write that closes the target and throws if | |
8646 | writing fails. The current quit handler is overridden to avoid | |
8647 | quitting in the middle of packet sequence, as that would break | |
8648 | communication with the remote server. See | |
8649 | remote_serial_quit_handler for more detail. */ | |
8650 | ||
8651 | static void | |
8652 | remote_serial_write (const char *str, int len) | |
8653 | { | |
8654 | struct remote_state *rs = get_remote_state (); | |
8655 | ||
8656 | scoped_restore restore_quit | |
8657 | = make_scoped_restore (&quit_handler, remote_serial_quit_handler); | |
8658 | ||
8659 | rs->got_ctrlc_during_io = 0; | |
8660 | ||
8661 | if (serial_write (rs->remote_desc, str, len)) | |
8662 | { | |
8663 | unpush_and_perror (_("Remote communication error. " | |
8664 | "Target disconnected.")); | |
8665 | } | |
8666 | ||
8667 | if (rs->got_ctrlc_during_io) | |
8668 | set_quit_flag (); | |
8669 | } | |
8670 | ||
8671 | /* Send the command in *BUF to the remote machine, and read the reply | |
8672 | into *BUF. Report an error if we get an error reply. Resize | |
8673 | *BUF using xrealloc if necessary to hold the result, and update | |
8674 | *SIZEOF_BUF. */ | |
8675 | ||
8676 | static void | |
8677 | remote_send (char **buf, | |
8678 | long *sizeof_buf) | |
8679 | { | |
8680 | putpkt (*buf); | |
8681 | getpkt (buf, sizeof_buf, 0); | |
8682 | ||
8683 | if ((*buf)[0] == 'E') | |
8684 | error (_("Remote failure reply: %s"), *buf); | |
8685 | } | |
8686 | ||
8687 | /* Return a string representing an escaped version of BUF, of len N. | |
8688 | E.g. \n is converted to \\n, \t to \\t, etc. */ | |
8689 | ||
8690 | static std::string | |
8691 | escape_buffer (const char *buf, int n) | |
8692 | { | |
8693 | string_file stb; | |
8694 | ||
8695 | stb.putstrn (buf, n, '\\'); | |
8696 | return std::move (stb.string ()); | |
8697 | } | |
8698 | ||
8699 | /* Display a null-terminated packet on stdout, for debugging, using C | |
8700 | string notation. */ | |
8701 | ||
8702 | static void | |
8703 | print_packet (const char *buf) | |
8704 | { | |
8705 | puts_filtered ("\""); | |
8706 | fputstr_filtered (buf, '"', gdb_stdout); | |
8707 | puts_filtered ("\""); | |
8708 | } | |
8709 | ||
8710 | int | |
8711 | putpkt (const char *buf) | |
8712 | { | |
8713 | return putpkt_binary (buf, strlen (buf)); | |
8714 | } | |
8715 | ||
8716 | /* Send a packet to the remote machine, with error checking. The data | |
8717 | of the packet is in BUF. The string in BUF can be at most | |
8718 | get_remote_packet_size () - 5 to account for the $, # and checksum, | |
8719 | and for a possible /0 if we are debugging (remote_debug) and want | |
8720 | to print the sent packet as a string. */ | |
8721 | ||
8722 | static int | |
8723 | putpkt_binary (const char *buf, int cnt) | |
8724 | { | |
8725 | struct remote_state *rs = get_remote_state (); | |
8726 | int i; | |
8727 | unsigned char csum = 0; | |
8728 | gdb::def_vector<char> data (cnt + 6); | |
8729 | char *buf2 = data.data (); | |
8730 | ||
8731 | int ch; | |
8732 | int tcount = 0; | |
8733 | char *p; | |
8734 | ||
8735 | /* Catch cases like trying to read memory or listing threads while | |
8736 | we're waiting for a stop reply. The remote server wouldn't be | |
8737 | ready to handle this request, so we'd hang and timeout. We don't | |
8738 | have to worry about this in synchronous mode, because in that | |
8739 | case it's not possible to issue a command while the target is | |
8740 | running. This is not a problem in non-stop mode, because in that | |
8741 | case, the stub is always ready to process serial input. */ | |
8742 | if (!target_is_non_stop_p () | |
8743 | && target_is_async_p () | |
8744 | && rs->waiting_for_stop_reply) | |
8745 | { | |
8746 | error (_("Cannot execute this command while the target is running.\n" | |
8747 | "Use the \"interrupt\" command to stop the target\n" | |
8748 | "and then try again.")); | |
8749 | } | |
8750 | ||
8751 | /* We're sending out a new packet. Make sure we don't look at a | |
8752 | stale cached response. */ | |
8753 | rs->cached_wait_status = 0; | |
8754 | ||
8755 | /* Copy the packet into buffer BUF2, encapsulating it | |
8756 | and giving it a checksum. */ | |
8757 | ||
8758 | p = buf2; | |
8759 | *p++ = '$'; | |
8760 | ||
8761 | for (i = 0; i < cnt; i++) | |
8762 | { | |
8763 | csum += buf[i]; | |
8764 | *p++ = buf[i]; | |
8765 | } | |
8766 | *p++ = '#'; | |
8767 | *p++ = tohex ((csum >> 4) & 0xf); | |
8768 | *p++ = tohex (csum & 0xf); | |
8769 | ||
8770 | /* Send it over and over until we get a positive ack. */ | |
8771 | ||
8772 | while (1) | |
8773 | { | |
8774 | int started_error_output = 0; | |
8775 | ||
8776 | if (remote_debug) | |
8777 | { | |
8778 | *p = '\0'; | |
8779 | ||
8780 | int len = (int) (p - buf2); | |
8781 | ||
8782 | std::string str | |
8783 | = escape_buffer (buf2, std::min (len, REMOTE_DEBUG_MAX_CHAR)); | |
8784 | ||
8785 | fprintf_unfiltered (gdb_stdlog, "Sending packet: %s", str.c_str ()); | |
8786 | ||
8787 | if (str.length () > REMOTE_DEBUG_MAX_CHAR) | |
8788 | { | |
8789 | fprintf_unfiltered (gdb_stdlog, "[%zu bytes omitted]", | |
8790 | str.length () - REMOTE_DEBUG_MAX_CHAR); | |
8791 | } | |
8792 | ||
8793 | fprintf_unfiltered (gdb_stdlog, "..."); | |
8794 | ||
8795 | gdb_flush (gdb_stdlog); | |
8796 | } | |
8797 | remote_serial_write (buf2, p - buf2); | |
8798 | ||
8799 | /* If this is a no acks version of the remote protocol, send the | |
8800 | packet and move on. */ | |
8801 | if (rs->noack_mode) | |
8802 | break; | |
8803 | ||
8804 | /* Read until either a timeout occurs (-2) or '+' is read. | |
8805 | Handle any notification that arrives in the mean time. */ | |
8806 | while (1) | |
8807 | { | |
8808 | ch = readchar (remote_timeout); | |
8809 | ||
8810 | if (remote_debug) | |
8811 | { | |
8812 | switch (ch) | |
8813 | { | |
8814 | case '+': | |
8815 | case '-': | |
8816 | case SERIAL_TIMEOUT: | |
8817 | case '$': | |
8818 | case '%': | |
8819 | if (started_error_output) | |
8820 | { | |
8821 | putchar_unfiltered ('\n'); | |
8822 | started_error_output = 0; | |
8823 | } | |
8824 | } | |
8825 | } | |
8826 | ||
8827 | switch (ch) | |
8828 | { | |
8829 | case '+': | |
8830 | if (remote_debug) | |
8831 | fprintf_unfiltered (gdb_stdlog, "Ack\n"); | |
8832 | return 1; | |
8833 | case '-': | |
8834 | if (remote_debug) | |
8835 | fprintf_unfiltered (gdb_stdlog, "Nak\n"); | |
8836 | /* FALLTHROUGH */ | |
8837 | case SERIAL_TIMEOUT: | |
8838 | tcount++; | |
8839 | if (tcount > 3) | |
8840 | return 0; | |
8841 | break; /* Retransmit buffer. */ | |
8842 | case '$': | |
8843 | { | |
8844 | if (remote_debug) | |
8845 | fprintf_unfiltered (gdb_stdlog, | |
8846 | "Packet instead of Ack, ignoring it\n"); | |
8847 | /* It's probably an old response sent because an ACK | |
8848 | was lost. Gobble up the packet and ack it so it | |
8849 | doesn't get retransmitted when we resend this | |
8850 | packet. */ | |
8851 | skip_frame (); | |
8852 | remote_serial_write ("+", 1); | |
8853 | continue; /* Now, go look for +. */ | |
8854 | } | |
8855 | ||
8856 | case '%': | |
8857 | { | |
8858 | int val; | |
8859 | ||
8860 | /* If we got a notification, handle it, and go back to looking | |
8861 | for an ack. */ | |
8862 | /* We've found the start of a notification. Now | |
8863 | collect the data. */ | |
8864 | val = read_frame (&rs->buf, &rs->buf_size); | |
8865 | if (val >= 0) | |
8866 | { | |
8867 | if (remote_debug) | |
8868 | { | |
8869 | std::string str = escape_buffer (rs->buf, val); | |
8870 | ||
8871 | fprintf_unfiltered (gdb_stdlog, | |
8872 | " Notification received: %s\n", | |
8873 | str.c_str ()); | |
8874 | } | |
8875 | handle_notification (rs->notif_state, rs->buf); | |
8876 | /* We're in sync now, rewait for the ack. */ | |
8877 | tcount = 0; | |
8878 | } | |
8879 | else | |
8880 | { | |
8881 | if (remote_debug) | |
8882 | { | |
8883 | if (!started_error_output) | |
8884 | { | |
8885 | started_error_output = 1; | |
8886 | fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: "); | |
8887 | } | |
8888 | fputc_unfiltered (ch & 0177, gdb_stdlog); | |
8889 | fprintf_unfiltered (gdb_stdlog, "%s", rs->buf); | |
8890 | } | |
8891 | } | |
8892 | continue; | |
8893 | } | |
8894 | /* fall-through */ | |
8895 | default: | |
8896 | if (remote_debug) | |
8897 | { | |
8898 | if (!started_error_output) | |
8899 | { | |
8900 | started_error_output = 1; | |
8901 | fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: "); | |
8902 | } | |
8903 | fputc_unfiltered (ch & 0177, gdb_stdlog); | |
8904 | } | |
8905 | continue; | |
8906 | } | |
8907 | break; /* Here to retransmit. */ | |
8908 | } | |
8909 | ||
8910 | #if 0 | |
8911 | /* This is wrong. If doing a long backtrace, the user should be | |
8912 | able to get out next time we call QUIT, without anything as | |
8913 | violent as interrupt_query. If we want to provide a way out of | |
8914 | here without getting to the next QUIT, it should be based on | |
8915 | hitting ^C twice as in remote_wait. */ | |
8916 | if (quit_flag) | |
8917 | { | |
8918 | quit_flag = 0; | |
8919 | interrupt_query (); | |
8920 | } | |
8921 | #endif | |
8922 | } | |
8923 | ||
8924 | return 0; | |
8925 | } | |
8926 | ||
8927 | /* Come here after finding the start of a frame when we expected an | |
8928 | ack. Do our best to discard the rest of this packet. */ | |
8929 | ||
8930 | static void | |
8931 | skip_frame (void) | |
8932 | { | |
8933 | int c; | |
8934 | ||
8935 | while (1) | |
8936 | { | |
8937 | c = readchar (remote_timeout); | |
8938 | switch (c) | |
8939 | { | |
8940 | case SERIAL_TIMEOUT: | |
8941 | /* Nothing we can do. */ | |
8942 | return; | |
8943 | case '#': | |
8944 | /* Discard the two bytes of checksum and stop. */ | |
8945 | c = readchar (remote_timeout); | |
8946 | if (c >= 0) | |
8947 | c = readchar (remote_timeout); | |
8948 | ||
8949 | return; | |
8950 | case '*': /* Run length encoding. */ | |
8951 | /* Discard the repeat count. */ | |
8952 | c = readchar (remote_timeout); | |
8953 | if (c < 0) | |
8954 | return; | |
8955 | break; | |
8956 | default: | |
8957 | /* A regular character. */ | |
8958 | break; | |
8959 | } | |
8960 | } | |
8961 | } | |
8962 | ||
8963 | /* Come here after finding the start of the frame. Collect the rest | |
8964 | into *BUF, verifying the checksum, length, and handling run-length | |
8965 | compression. NUL terminate the buffer. If there is not enough room, | |
8966 | expand *BUF using xrealloc. | |
8967 | ||
8968 | Returns -1 on error, number of characters in buffer (ignoring the | |
8969 | trailing NULL) on success. (could be extended to return one of the | |
8970 | SERIAL status indications). */ | |
8971 | ||
8972 | static long | |
8973 | read_frame (char **buf_p, | |
8974 | long *sizeof_buf) | |
8975 | { | |
8976 | unsigned char csum; | |
8977 | long bc; | |
8978 | int c; | |
8979 | char *buf = *buf_p; | |
8980 | struct remote_state *rs = get_remote_state (); | |
8981 | ||
8982 | csum = 0; | |
8983 | bc = 0; | |
8984 | ||
8985 | while (1) | |
8986 | { | |
8987 | c = readchar (remote_timeout); | |
8988 | switch (c) | |
8989 | { | |
8990 | case SERIAL_TIMEOUT: | |
8991 | if (remote_debug) | |
8992 | fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog); | |
8993 | return -1; | |
8994 | case '$': | |
8995 | if (remote_debug) | |
8996 | fputs_filtered ("Saw new packet start in middle of old one\n", | |
8997 | gdb_stdlog); | |
8998 | return -1; /* Start a new packet, count retries. */ | |
8999 | case '#': | |
9000 | { | |
9001 | unsigned char pktcsum; | |
9002 | int check_0 = 0; | |
9003 | int check_1 = 0; | |
9004 | ||
9005 | buf[bc] = '\0'; | |
9006 | ||
9007 | check_0 = readchar (remote_timeout); | |
9008 | if (check_0 >= 0) | |
9009 | check_1 = readchar (remote_timeout); | |
9010 | ||
9011 | if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT) | |
9012 | { | |
9013 | if (remote_debug) | |
9014 | fputs_filtered ("Timeout in checksum, retrying\n", | |
9015 | gdb_stdlog); | |
9016 | return -1; | |
9017 | } | |
9018 | else if (check_0 < 0 || check_1 < 0) | |
9019 | { | |
9020 | if (remote_debug) | |
9021 | fputs_filtered ("Communication error in checksum\n", | |
9022 | gdb_stdlog); | |
9023 | return -1; | |
9024 | } | |
9025 | ||
9026 | /* Don't recompute the checksum; with no ack packets we | |
9027 | don't have any way to indicate a packet retransmission | |
9028 | is necessary. */ | |
9029 | if (rs->noack_mode) | |
9030 | return bc; | |
9031 | ||
9032 | pktcsum = (fromhex (check_0) << 4) | fromhex (check_1); | |
9033 | if (csum == pktcsum) | |
9034 | return bc; | |
9035 | ||
9036 | if (remote_debug) | |
9037 | { | |
9038 | std::string str = escape_buffer (buf, bc); | |
9039 | ||
9040 | fprintf_unfiltered (gdb_stdlog, | |
9041 | "Bad checksum, sentsum=0x%x, " | |
9042 | "csum=0x%x, buf=%s\n", | |
9043 | pktcsum, csum, str.c_str ()); | |
9044 | } | |
9045 | /* Number of characters in buffer ignoring trailing | |
9046 | NULL. */ | |
9047 | return -1; | |
9048 | } | |
9049 | case '*': /* Run length encoding. */ | |
9050 | { | |
9051 | int repeat; | |
9052 | ||
9053 | csum += c; | |
9054 | c = readchar (remote_timeout); | |
9055 | csum += c; | |
9056 | repeat = c - ' ' + 3; /* Compute repeat count. */ | |
9057 | ||
9058 | /* The character before ``*'' is repeated. */ | |
9059 | ||
9060 | if (repeat > 0 && repeat <= 255 && bc > 0) | |
9061 | { | |
9062 | if (bc + repeat - 1 >= *sizeof_buf - 1) | |
9063 | { | |
9064 | /* Make some more room in the buffer. */ | |
9065 | *sizeof_buf += repeat; | |
9066 | *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf); | |
9067 | buf = *buf_p; | |
9068 | } | |
9069 | ||
9070 | memset (&buf[bc], buf[bc - 1], repeat); | |
9071 | bc += repeat; | |
9072 | continue; | |
9073 | } | |
9074 | ||
9075 | buf[bc] = '\0'; | |
9076 | printf_filtered (_("Invalid run length encoding: %s\n"), buf); | |
9077 | return -1; | |
9078 | } | |
9079 | default: | |
9080 | if (bc >= *sizeof_buf - 1) | |
9081 | { | |
9082 | /* Make some more room in the buffer. */ | |
9083 | *sizeof_buf *= 2; | |
9084 | *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf); | |
9085 | buf = *buf_p; | |
9086 | } | |
9087 | ||
9088 | buf[bc++] = c; | |
9089 | csum += c; | |
9090 | continue; | |
9091 | } | |
9092 | } | |
9093 | } | |
9094 | ||
9095 | /* Read a packet from the remote machine, with error checking, and | |
9096 | store it in *BUF. Resize *BUF using xrealloc if necessary to hold | |
9097 | the result, and update *SIZEOF_BUF. If FOREVER, wait forever | |
9098 | rather than timing out; this is used (in synchronous mode) to wait | |
9099 | for a target that is is executing user code to stop. */ | |
9100 | /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we | |
9101 | don't have to change all the calls to getpkt to deal with the | |
9102 | return value, because at the moment I don't know what the right | |
9103 | thing to do it for those. */ | |
9104 | void | |
9105 | getpkt (char **buf, | |
9106 | long *sizeof_buf, | |
9107 | int forever) | |
9108 | { | |
9109 | getpkt_sane (buf, sizeof_buf, forever); | |
9110 | } | |
9111 | ||
9112 | ||
9113 | /* Read a packet from the remote machine, with error checking, and | |
9114 | store it in *BUF. Resize *BUF using xrealloc if necessary to hold | |
9115 | the result, and update *SIZEOF_BUF. If FOREVER, wait forever | |
9116 | rather than timing out; this is used (in synchronous mode) to wait | |
9117 | for a target that is is executing user code to stop. If FOREVER == | |
9118 | 0, this function is allowed to time out gracefully and return an | |
9119 | indication of this to the caller. Otherwise return the number of | |
9120 | bytes read. If EXPECTING_NOTIF, consider receiving a notification | |
9121 | enough reason to return to the caller. *IS_NOTIF is an output | |
9122 | boolean that indicates whether *BUF holds a notification or not | |
9123 | (a regular packet). */ | |
9124 | ||
9125 | static int | |
9126 | getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever, | |
9127 | int expecting_notif, int *is_notif) | |
9128 | { | |
9129 | struct remote_state *rs = get_remote_state (); | |
9130 | int c; | |
9131 | int tries; | |
9132 | int timeout; | |
9133 | int val = -1; | |
9134 | ||
9135 | /* We're reading a new response. Make sure we don't look at a | |
9136 | previously cached response. */ | |
9137 | rs->cached_wait_status = 0; | |
9138 | ||
9139 | strcpy (*buf, "timeout"); | |
9140 | ||
9141 | if (forever) | |
9142 | timeout = watchdog > 0 ? watchdog : -1; | |
9143 | else if (expecting_notif) | |
9144 | timeout = 0; /* There should already be a char in the buffer. If | |
9145 | not, bail out. */ | |
9146 | else | |
9147 | timeout = remote_timeout; | |
9148 | ||
9149 | #define MAX_TRIES 3 | |
9150 | ||
9151 | /* Process any number of notifications, and then return when | |
9152 | we get a packet. */ | |
9153 | for (;;) | |
9154 | { | |
9155 | /* If we get a timeout or bad checksum, retry up to MAX_TRIES | |
9156 | times. */ | |
9157 | for (tries = 1; tries <= MAX_TRIES; tries++) | |
9158 | { | |
9159 | /* This can loop forever if the remote side sends us | |
9160 | characters continuously, but if it pauses, we'll get | |
9161 | SERIAL_TIMEOUT from readchar because of timeout. Then | |
9162 | we'll count that as a retry. | |
9163 | ||
9164 | Note that even when forever is set, we will only wait | |
9165 | forever prior to the start of a packet. After that, we | |
9166 | expect characters to arrive at a brisk pace. They should | |
9167 | show up within remote_timeout intervals. */ | |
9168 | do | |
9169 | c = readchar (timeout); | |
9170 | while (c != SERIAL_TIMEOUT && c != '$' && c != '%'); | |
9171 | ||
9172 | if (c == SERIAL_TIMEOUT) | |
9173 | { | |
9174 | if (expecting_notif) | |
9175 | return -1; /* Don't complain, it's normal to not get | |
9176 | anything in this case. */ | |
9177 | ||
9178 | if (forever) /* Watchdog went off? Kill the target. */ | |
9179 | { | |
9180 | remote_unpush_target (); | |
9181 | throw_error (TARGET_CLOSE_ERROR, | |
9182 | _("Watchdog timeout has expired. " | |
9183 | "Target detached.")); | |
9184 | } | |
9185 | if (remote_debug) | |
9186 | fputs_filtered ("Timed out.\n", gdb_stdlog); | |
9187 | } | |
9188 | else | |
9189 | { | |
9190 | /* We've found the start of a packet or notification. | |
9191 | Now collect the data. */ | |
9192 | val = read_frame (buf, sizeof_buf); | |
9193 | if (val >= 0) | |
9194 | break; | |
9195 | } | |
9196 | ||
9197 | remote_serial_write ("-", 1); | |
9198 | } | |
9199 | ||
9200 | if (tries > MAX_TRIES) | |
9201 | { | |
9202 | /* We have tried hard enough, and just can't receive the | |
9203 | packet/notification. Give up. */ | |
9204 | printf_unfiltered (_("Ignoring packet error, continuing...\n")); | |
9205 | ||
9206 | /* Skip the ack char if we're in no-ack mode. */ | |
9207 | if (!rs->noack_mode) | |
9208 | remote_serial_write ("+", 1); | |
9209 | return -1; | |
9210 | } | |
9211 | ||
9212 | /* If we got an ordinary packet, return that to our caller. */ | |
9213 | if (c == '$') | |
9214 | { | |
9215 | if (remote_debug) | |
9216 | { | |
9217 | std::string str | |
9218 | = escape_buffer (*buf, | |
9219 | std::min (val, REMOTE_DEBUG_MAX_CHAR)); | |
9220 | ||
9221 | fprintf_unfiltered (gdb_stdlog, "Packet received: %s", | |
9222 | str.c_str ()); | |
9223 | ||
9224 | if (str.length () > REMOTE_DEBUG_MAX_CHAR) | |
9225 | { | |
9226 | fprintf_unfiltered (gdb_stdlog, "[%zu bytes omitted]", | |
9227 | str.length () - REMOTE_DEBUG_MAX_CHAR); | |
9228 | } | |
9229 | ||
9230 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
9231 | } | |
9232 | ||
9233 | /* Skip the ack char if we're in no-ack mode. */ | |
9234 | if (!rs->noack_mode) | |
9235 | remote_serial_write ("+", 1); | |
9236 | if (is_notif != NULL) | |
9237 | *is_notif = 0; | |
9238 | return val; | |
9239 | } | |
9240 | ||
9241 | /* If we got a notification, handle it, and go back to looking | |
9242 | for a packet. */ | |
9243 | else | |
9244 | { | |
9245 | gdb_assert (c == '%'); | |
9246 | ||
9247 | if (remote_debug) | |
9248 | { | |
9249 | std::string str = escape_buffer (*buf, val); | |
9250 | ||
9251 | fprintf_unfiltered (gdb_stdlog, | |
9252 | " Notification received: %s\n", | |
9253 | str.c_str ()); | |
9254 | } | |
9255 | if (is_notif != NULL) | |
9256 | *is_notif = 1; | |
9257 | ||
9258 | handle_notification (rs->notif_state, *buf); | |
9259 | ||
9260 | /* Notifications require no acknowledgement. */ | |
9261 | ||
9262 | if (expecting_notif) | |
9263 | return val; | |
9264 | } | |
9265 | } | |
9266 | } | |
9267 | ||
9268 | static int | |
9269 | getpkt_sane (char **buf, long *sizeof_buf, int forever) | |
9270 | { | |
9271 | return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0, NULL); | |
9272 | } | |
9273 | ||
9274 | static int | |
9275 | getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever, | |
9276 | int *is_notif) | |
9277 | { | |
9278 | return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1, | |
9279 | is_notif); | |
9280 | } | |
9281 | ||
9282 | /* Check whether EVENT is a fork event for the process specified | |
9283 | by the pid passed in DATA, and if it is, kill the fork child. */ | |
9284 | ||
9285 | static int | |
9286 | kill_child_of_pending_fork (QUEUE (stop_reply_p) *q, | |
9287 | QUEUE_ITER (stop_reply_p) *iter, | |
9288 | stop_reply_p event, | |
9289 | void *data) | |
9290 | { | |
9291 | struct queue_iter_param *param = (struct queue_iter_param *) data; | |
9292 | int parent_pid = *(int *) param->input; | |
9293 | ||
9294 | if (is_pending_fork_parent (&event->ws, parent_pid, event->ptid)) | |
9295 | { | |
9296 | struct remote_state *rs = get_remote_state (); | |
9297 | int child_pid = ptid_get_pid (event->ws.value.related_pid); | |
9298 | int res; | |
9299 | ||
9300 | res = remote_vkill (child_pid, rs); | |
9301 | if (res != 0) | |
9302 | error (_("Can't kill fork child process %d"), child_pid); | |
9303 | } | |
9304 | ||
9305 | return 1; | |
9306 | } | |
9307 | ||
9308 | /* Kill any new fork children of process PID that haven't been | |
9309 | processed by follow_fork. */ | |
9310 | ||
9311 | static void | |
9312 | kill_new_fork_children (int pid, struct remote_state *rs) | |
9313 | { | |
9314 | struct thread_info *thread; | |
9315 | struct notif_client *notif = ¬if_client_stop; | |
9316 | struct queue_iter_param param; | |
9317 | ||
9318 | /* Kill the fork child threads of any threads in process PID | |
9319 | that are stopped at a fork event. */ | |
9320 | ALL_NON_EXITED_THREADS (thread) | |
9321 | { | |
9322 | struct target_waitstatus *ws = &thread->pending_follow; | |
9323 | ||
9324 | if (is_pending_fork_parent (ws, pid, thread->ptid)) | |
9325 | { | |
9326 | struct remote_state *rs = get_remote_state (); | |
9327 | int child_pid = ptid_get_pid (ws->value.related_pid); | |
9328 | int res; | |
9329 | ||
9330 | res = remote_vkill (child_pid, rs); | |
9331 | if (res != 0) | |
9332 | error (_("Can't kill fork child process %d"), child_pid); | |
9333 | } | |
9334 | } | |
9335 | ||
9336 | /* Check for any pending fork events (not reported or processed yet) | |
9337 | in process PID and kill those fork child threads as well. */ | |
9338 | remote_notif_get_pending_events (notif); | |
9339 | param.input = &pid; | |
9340 | param.output = NULL; | |
9341 | QUEUE_iterate (stop_reply_p, stop_reply_queue, | |
9342 | kill_child_of_pending_fork, ¶m); | |
9343 | } | |
9344 | ||
9345 | \f | |
9346 | /* Target hook to kill the current inferior. */ | |
9347 | ||
9348 | static void | |
9349 | remote_kill (struct target_ops *ops) | |
9350 | { | |
9351 | int res = -1; | |
9352 | int pid = ptid_get_pid (inferior_ptid); | |
9353 | struct remote_state *rs = get_remote_state (); | |
9354 | ||
9355 | if (packet_support (PACKET_vKill) != PACKET_DISABLE) | |
9356 | { | |
9357 | /* If we're stopped while forking and we haven't followed yet, | |
9358 | kill the child task. We need to do this before killing the | |
9359 | parent task because if this is a vfork then the parent will | |
9360 | be sleeping. */ | |
9361 | kill_new_fork_children (pid, rs); | |
9362 | ||
9363 | res = remote_vkill (pid, rs); | |
9364 | if (res == 0) | |
9365 | { | |
9366 | target_mourn_inferior (inferior_ptid); | |
9367 | return; | |
9368 | } | |
9369 | } | |
9370 | ||
9371 | /* If we are in 'target remote' mode and we are killing the only | |
9372 | inferior, then we will tell gdbserver to exit and unpush the | |
9373 | target. */ | |
9374 | if (res == -1 && !remote_multi_process_p (rs) | |
9375 | && number_of_live_inferiors () == 1) | |
9376 | { | |
9377 | remote_kill_k (); | |
9378 | ||
9379 | /* We've killed the remote end, we get to mourn it. If we are | |
9380 | not in extended mode, mourning the inferior also unpushes | |
9381 | remote_ops from the target stack, which closes the remote | |
9382 | connection. */ | |
9383 | target_mourn_inferior (inferior_ptid); | |
9384 | ||
9385 | return; | |
9386 | } | |
9387 | ||
9388 | error (_("Can't kill process")); | |
9389 | } | |
9390 | ||
9391 | /* Send a kill request to the target using the 'vKill' packet. */ | |
9392 | ||
9393 | static int | |
9394 | remote_vkill (int pid, struct remote_state *rs) | |
9395 | { | |
9396 | if (packet_support (PACKET_vKill) == PACKET_DISABLE) | |
9397 | return -1; | |
9398 | ||
9399 | /* Tell the remote target to detach. */ | |
9400 | xsnprintf (rs->buf, get_remote_packet_size (), "vKill;%x", pid); | |
9401 | putpkt (rs->buf); | |
9402 | getpkt (&rs->buf, &rs->buf_size, 0); | |
9403 | ||
9404 | switch (packet_ok (rs->buf, | |
9405 | &remote_protocol_packets[PACKET_vKill])) | |
9406 | { | |
9407 | case PACKET_OK: | |
9408 | return 0; | |
9409 | case PACKET_ERROR: | |
9410 | return 1; | |
9411 | case PACKET_UNKNOWN: | |
9412 | return -1; | |
9413 | default: | |
9414 | internal_error (__FILE__, __LINE__, _("Bad result from packet_ok")); | |
9415 | } | |
9416 | } | |
9417 | ||
9418 | /* Send a kill request to the target using the 'k' packet. */ | |
9419 | ||
9420 | static void | |
9421 | remote_kill_k (void) | |
9422 | { | |
9423 | /* Catch errors so the user can quit from gdb even when we | |
9424 | aren't on speaking terms with the remote system. */ | |
9425 | TRY | |
9426 | { | |
9427 | putpkt ("k"); | |
9428 | } | |
9429 | CATCH (ex, RETURN_MASK_ERROR) | |
9430 | { | |
9431 | if (ex.error == TARGET_CLOSE_ERROR) | |
9432 | { | |
9433 | /* If we got an (EOF) error that caused the target | |
9434 | to go away, then we're done, that's what we wanted. | |
9435 | "k" is susceptible to cause a premature EOF, given | |
9436 | that the remote server isn't actually required to | |
9437 | reply to "k", and it can happen that it doesn't | |
9438 | even get to reply ACK to the "k". */ | |
9439 | return; | |
9440 | } | |
9441 | ||
9442 | /* Otherwise, something went wrong. We didn't actually kill | |
9443 | the target. Just propagate the exception, and let the | |
9444 | user or higher layers decide what to do. */ | |
9445 | throw_exception (ex); | |
9446 | } | |
9447 | END_CATCH | |
9448 | } | |
9449 | ||
9450 | static void | |
9451 | remote_mourn (struct target_ops *target) | |
9452 | { | |
9453 | struct remote_state *rs = get_remote_state (); | |
9454 | ||
9455 | /* In 'target remote' mode with one inferior, we close the connection. */ | |
9456 | if (!rs->extended && number_of_live_inferiors () <= 1) | |
9457 | { | |
9458 | unpush_target (target); | |
9459 | ||
9460 | /* remote_close takes care of doing most of the clean up. */ | |
9461 | generic_mourn_inferior (); | |
9462 | return; | |
9463 | } | |
9464 | ||
9465 | /* In case we got here due to an error, but we're going to stay | |
9466 | connected. */ | |
9467 | rs->waiting_for_stop_reply = 0; | |
9468 | ||
9469 | /* If the current general thread belonged to the process we just | |
9470 | detached from or has exited, the remote side current general | |
9471 | thread becomes undefined. Considering a case like this: | |
9472 | ||
9473 | - We just got here due to a detach. | |
9474 | - The process that we're detaching from happens to immediately | |
9475 | report a global breakpoint being hit in non-stop mode, in the | |
9476 | same thread we had selected before. | |
9477 | - GDB attaches to this process again. | |
9478 | - This event happens to be the next event we handle. | |
9479 | ||
9480 | GDB would consider that the current general thread didn't need to | |
9481 | be set on the stub side (with Hg), since for all it knew, | |
9482 | GENERAL_THREAD hadn't changed. | |
9483 | ||
9484 | Notice that although in all-stop mode, the remote server always | |
9485 | sets the current thread to the thread reporting the stop event, | |
9486 | that doesn't happen in non-stop mode; in non-stop, the stub *must | |
9487 | not* change the current thread when reporting a breakpoint hit, | |
9488 | due to the decoupling of event reporting and event handling. | |
9489 | ||
9490 | To keep things simple, we always invalidate our notion of the | |
9491 | current thread. */ | |
9492 | record_currthread (rs, minus_one_ptid); | |
9493 | ||
9494 | /* Call common code to mark the inferior as not running. */ | |
9495 | generic_mourn_inferior (); | |
9496 | ||
9497 | if (!have_inferiors ()) | |
9498 | { | |
9499 | if (!remote_multi_process_p (rs)) | |
9500 | { | |
9501 | /* Check whether the target is running now - some remote stubs | |
9502 | automatically restart after kill. */ | |
9503 | putpkt ("?"); | |
9504 | getpkt (&rs->buf, &rs->buf_size, 0); | |
9505 | ||
9506 | if (rs->buf[0] == 'S' || rs->buf[0] == 'T') | |
9507 | { | |
9508 | /* Assume that the target has been restarted. Set | |
9509 | inferior_ptid so that bits of core GDB realizes | |
9510 | there's something here, e.g., so that the user can | |
9511 | say "kill" again. */ | |
9512 | inferior_ptid = magic_null_ptid; | |
9513 | } | |
9514 | } | |
9515 | } | |
9516 | } | |
9517 | ||
9518 | static int | |
9519 | extended_remote_supports_disable_randomization (struct target_ops *self) | |
9520 | { | |
9521 | return packet_support (PACKET_QDisableRandomization) == PACKET_ENABLE; | |
9522 | } | |
9523 | ||
9524 | static void | |
9525 | extended_remote_disable_randomization (int val) | |
9526 | { | |
9527 | struct remote_state *rs = get_remote_state (); | |
9528 | char *reply; | |
9529 | ||
9530 | xsnprintf (rs->buf, get_remote_packet_size (), "QDisableRandomization:%x", | |
9531 | val); | |
9532 | putpkt (rs->buf); | |
9533 | reply = remote_get_noisy_reply (); | |
9534 | if (*reply == '\0') | |
9535 | error (_("Target does not support QDisableRandomization.")); | |
9536 | if (strcmp (reply, "OK") != 0) | |
9537 | error (_("Bogus QDisableRandomization reply from target: %s"), reply); | |
9538 | } | |
9539 | ||
9540 | static int | |
9541 | extended_remote_run (const std::string &args) | |
9542 | { | |
9543 | struct remote_state *rs = get_remote_state (); | |
9544 | int len; | |
9545 | const char *remote_exec_file = get_remote_exec_file (); | |
9546 | ||
9547 | /* If the user has disabled vRun support, or we have detected that | |
9548 | support is not available, do not try it. */ | |
9549 | if (packet_support (PACKET_vRun) == PACKET_DISABLE) | |
9550 | return -1; | |
9551 | ||
9552 | strcpy (rs->buf, "vRun;"); | |
9553 | len = strlen (rs->buf); | |
9554 | ||
9555 | if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ()) | |
9556 | error (_("Remote file name too long for run packet")); | |
9557 | len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, | |
9558 | strlen (remote_exec_file)); | |
9559 | ||
9560 | if (!args.empty ()) | |
9561 | { | |
9562 | int i; | |
9563 | ||
9564 | gdb_argv argv (args.c_str ()); | |
9565 | for (i = 0; argv[i] != NULL; i++) | |
9566 | { | |
9567 | if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ()) | |
9568 | error (_("Argument list too long for run packet")); | |
9569 | rs->buf[len++] = ';'; | |
9570 | len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, | |
9571 | strlen (argv[i])); | |
9572 | } | |
9573 | } | |
9574 | ||
9575 | rs->buf[len++] = '\0'; | |
9576 | ||
9577 | putpkt (rs->buf); | |
9578 | getpkt (&rs->buf, &rs->buf_size, 0); | |
9579 | ||
9580 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun])) | |
9581 | { | |
9582 | case PACKET_OK: | |
9583 | /* We have a wait response. All is well. */ | |
9584 | return 0; | |
9585 | case PACKET_UNKNOWN: | |
9586 | return -1; | |
9587 | case PACKET_ERROR: | |
9588 | if (remote_exec_file[0] == '\0') | |
9589 | error (_("Running the default executable on the remote target failed; " | |
9590 | "try \"set remote exec-file\"?")); | |
9591 | else | |
9592 | error (_("Running \"%s\" on the remote target failed"), | |
9593 | remote_exec_file); | |
9594 | default: | |
9595 | gdb_assert_not_reached (_("bad switch")); | |
9596 | } | |
9597 | } | |
9598 | ||
9599 | /* Helper function to send set/unset environment packets. ACTION is | |
9600 | either "set" or "unset". PACKET is either "QEnvironmentHexEncoded" | |
9601 | or "QEnvironmentUnsetVariable". VALUE is the variable to be | |
9602 | sent. */ | |
9603 | ||
9604 | static void | |
9605 | send_environment_packet (struct remote_state *rs, | |
9606 | const char *action, | |
9607 | const char *packet, | |
9608 | const char *value) | |
9609 | { | |
9610 | /* Convert the environment variable to an hex string, which | |
9611 | is the best format to be transmitted over the wire. */ | |
9612 | std::string encoded_value = bin2hex ((const gdb_byte *) value, | |
9613 | strlen (value)); | |
9614 | ||
9615 | xsnprintf (rs->buf, get_remote_packet_size (), | |
9616 | "%s:%s", packet, encoded_value.c_str ()); | |
9617 | ||
9618 | putpkt (rs->buf); | |
9619 | getpkt (&rs->buf, &rs->buf_size, 0); | |
9620 | if (strcmp (rs->buf, "OK") != 0) | |
9621 | warning (_("Unable to %s environment variable '%s' on remote."), | |
9622 | action, value); | |
9623 | } | |
9624 | ||
9625 | /* Helper function to handle the QEnvironment* packets. */ | |
9626 | ||
9627 | static void | |
9628 | extended_remote_environment_support (struct remote_state *rs) | |
9629 | { | |
9630 | if (packet_support (PACKET_QEnvironmentReset) != PACKET_DISABLE) | |
9631 | { | |
9632 | putpkt ("QEnvironmentReset"); | |
9633 | getpkt (&rs->buf, &rs->buf_size, 0); | |
9634 | if (strcmp (rs->buf, "OK") != 0) | |
9635 | warning (_("Unable to reset environment on remote.")); | |
9636 | } | |
9637 | ||
9638 | gdb_environ *e = ¤t_inferior ()->environment; | |
9639 | ||
9640 | if (packet_support (PACKET_QEnvironmentHexEncoded) != PACKET_DISABLE) | |
9641 | for (const std::string &el : e->user_set_env ()) | |
9642 | send_environment_packet (rs, "set", "QEnvironmentHexEncoded", | |
9643 | el.c_str ()); | |
9644 | ||
9645 | if (packet_support (PACKET_QEnvironmentUnset) != PACKET_DISABLE) | |
9646 | for (const std::string &el : e->user_unset_env ()) | |
9647 | send_environment_packet (rs, "unset", "QEnvironmentUnset", el.c_str ()); | |
9648 | } | |
9649 | ||
9650 | /* Helper function to set the current working directory for the | |
9651 | inferior in the remote target. */ | |
9652 | ||
9653 | static void | |
9654 | extended_remote_set_inferior_cwd (struct remote_state *rs) | |
9655 | { | |
9656 | if (packet_support (PACKET_QSetWorkingDir) != PACKET_DISABLE) | |
9657 | { | |
9658 | const char *inferior_cwd = get_inferior_cwd (); | |
9659 | ||
9660 | if (inferior_cwd != NULL) | |
9661 | { | |
9662 | std::string hexpath = bin2hex ((const gdb_byte *) inferior_cwd, | |
9663 | strlen (inferior_cwd)); | |
9664 | ||
9665 | xsnprintf (rs->buf, get_remote_packet_size (), | |
9666 | "QSetWorkingDir:%s", hexpath.c_str ()); | |
9667 | } | |
9668 | else | |
9669 | { | |
9670 | /* An empty inferior_cwd means that the user wants us to | |
9671 | reset the remote server's inferior's cwd. */ | |
9672 | xsnprintf (rs->buf, get_remote_packet_size (), | |
9673 | "QSetWorkingDir:"); | |
9674 | } | |
9675 | ||
9676 | putpkt (rs->buf); | |
9677 | getpkt (&rs->buf, &rs->buf_size, 0); | |
9678 | if (packet_ok (rs->buf, | |
9679 | &remote_protocol_packets[PACKET_QSetWorkingDir]) | |
9680 | != PACKET_OK) | |
9681 | error (_("\ | |
9682 | Remote replied unexpectedly while setting the inferior's working\n\ | |
9683 | directory: %s"), | |
9684 | rs->buf); | |
9685 | ||
9686 | } | |
9687 | } | |
9688 | ||
9689 | /* In the extended protocol we want to be able to do things like | |
9690 | "run" and have them basically work as expected. So we need | |
9691 | a special create_inferior function. We support changing the | |
9692 | executable file and the command line arguments, but not the | |
9693 | environment. */ | |
9694 | ||
9695 | static void | |
9696 | extended_remote_create_inferior (struct target_ops *ops, | |
9697 | const char *exec_file, | |
9698 | const std::string &args, | |
9699 | char **env, int from_tty) | |
9700 | { | |
9701 | int run_worked; | |
9702 | char *stop_reply; | |
9703 | struct remote_state *rs = get_remote_state (); | |
9704 | const char *remote_exec_file = get_remote_exec_file (); | |
9705 | ||
9706 | /* If running asynchronously, register the target file descriptor | |
9707 | with the event loop. */ | |
9708 | if (target_can_async_p ()) | |
9709 | target_async (1); | |
9710 | ||
9711 | /* Disable address space randomization if requested (and supported). */ | |
9712 | if (extended_remote_supports_disable_randomization (ops)) | |
9713 | extended_remote_disable_randomization (disable_randomization); | |
9714 | ||
9715 | /* If startup-with-shell is on, we inform gdbserver to start the | |
9716 | remote inferior using a shell. */ | |
9717 | if (packet_support (PACKET_QStartupWithShell) != PACKET_DISABLE) | |
9718 | { | |
9719 | xsnprintf (rs->buf, get_remote_packet_size (), | |
9720 | "QStartupWithShell:%d", startup_with_shell ? 1 : 0); | |
9721 | putpkt (rs->buf); | |
9722 | getpkt (&rs->buf, &rs->buf_size, 0); | |
9723 | if (strcmp (rs->buf, "OK") != 0) | |
9724 | error (_("\ | |
9725 | Remote replied unexpectedly while setting startup-with-shell: %s"), | |
9726 | rs->buf); | |
9727 | } | |
9728 | ||
9729 | extended_remote_environment_support (rs); | |
9730 | ||
9731 | extended_remote_set_inferior_cwd (rs); | |
9732 | ||
9733 | /* Now restart the remote server. */ | |
9734 | run_worked = extended_remote_run (args) != -1; | |
9735 | if (!run_worked) | |
9736 | { | |
9737 | /* vRun was not supported. Fail if we need it to do what the | |
9738 | user requested. */ | |
9739 | if (remote_exec_file[0]) | |
9740 | error (_("Remote target does not support \"set remote exec-file\"")); | |
9741 | if (!args.empty ()) | |
9742 | error (_("Remote target does not support \"set args\" or run <ARGS>")); | |
9743 | ||
9744 | /* Fall back to "R". */ | |
9745 | extended_remote_restart (); | |
9746 | } | |
9747 | ||
9748 | if (!have_inferiors ()) | |
9749 | { | |
9750 | /* Clean up from the last time we ran, before we mark the target | |
9751 | running again. This will mark breakpoints uninserted, and | |
9752 | get_offsets may insert breakpoints. */ | |
9753 | init_thread_list (); | |
9754 | init_wait_for_inferior (); | |
9755 | } | |
9756 | ||
9757 | /* vRun's success return is a stop reply. */ | |
9758 | stop_reply = run_worked ? rs->buf : NULL; | |
9759 | add_current_inferior_and_thread (stop_reply); | |
9760 | ||
9761 | /* Get updated offsets, if the stub uses qOffsets. */ | |
9762 | get_offsets (); | |
9763 | } | |
9764 | \f | |
9765 | ||
9766 | /* Given a location's target info BP_TGT and the packet buffer BUF, output | |
9767 | the list of conditions (in agent expression bytecode format), if any, the | |
9768 | target needs to evaluate. The output is placed into the packet buffer | |
9769 | started from BUF and ended at BUF_END. */ | |
9770 | ||
9771 | static int | |
9772 | remote_add_target_side_condition (struct gdbarch *gdbarch, | |
9773 | struct bp_target_info *bp_tgt, char *buf, | |
9774 | char *buf_end) | |
9775 | { | |
9776 | if (bp_tgt->conditions.empty ()) | |
9777 | return 0; | |
9778 | ||
9779 | buf += strlen (buf); | |
9780 | xsnprintf (buf, buf_end - buf, "%s", ";"); | |
9781 | buf++; | |
9782 | ||
9783 | /* Send conditions to the target. */ | |
9784 | for (agent_expr *aexpr : bp_tgt->conditions) | |
9785 | { | |
9786 | xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len); | |
9787 | buf += strlen (buf); | |
9788 | for (int i = 0; i < aexpr->len; ++i) | |
9789 | buf = pack_hex_byte (buf, aexpr->buf[i]); | |
9790 | *buf = '\0'; | |
9791 | } | |
9792 | return 0; | |
9793 | } | |
9794 | ||
9795 | static void | |
9796 | remote_add_target_side_commands (struct gdbarch *gdbarch, | |
9797 | struct bp_target_info *bp_tgt, char *buf) | |
9798 | { | |
9799 | if (bp_tgt->tcommands.empty ()) | |
9800 | return; | |
9801 | ||
9802 | buf += strlen (buf); | |
9803 | ||
9804 | sprintf (buf, ";cmds:%x,", bp_tgt->persist); | |
9805 | buf += strlen (buf); | |
9806 | ||
9807 | /* Concatenate all the agent expressions that are commands into the | |
9808 | cmds parameter. */ | |
9809 | for (agent_expr *aexpr : bp_tgt->tcommands) | |
9810 | { | |
9811 | sprintf (buf, "X%x,", aexpr->len); | |
9812 | buf += strlen (buf); | |
9813 | for (int i = 0; i < aexpr->len; ++i) | |
9814 | buf = pack_hex_byte (buf, aexpr->buf[i]); | |
9815 | *buf = '\0'; | |
9816 | } | |
9817 | } | |
9818 | ||
9819 | /* Insert a breakpoint. On targets that have software breakpoint | |
9820 | support, we ask the remote target to do the work; on targets | |
9821 | which don't, we insert a traditional memory breakpoint. */ | |
9822 | ||
9823 | static int | |
9824 | remote_insert_breakpoint (struct target_ops *ops, | |
9825 | struct gdbarch *gdbarch, | |
9826 | struct bp_target_info *bp_tgt) | |
9827 | { | |
9828 | /* Try the "Z" s/w breakpoint packet if it is not already disabled. | |
9829 | If it succeeds, then set the support to PACKET_ENABLE. If it | |
9830 | fails, and the user has explicitly requested the Z support then | |
9831 | report an error, otherwise, mark it disabled and go on. */ | |
9832 | ||
9833 | if (packet_support (PACKET_Z0) != PACKET_DISABLE) | |
9834 | { | |
9835 | CORE_ADDR addr = bp_tgt->reqstd_address; | |
9836 | struct remote_state *rs; | |
9837 | char *p, *endbuf; | |
9838 | int bpsize; | |
9839 | ||
9840 | /* Make sure the remote is pointing at the right process, if | |
9841 | necessary. */ | |
9842 | if (!gdbarch_has_global_breakpoints (target_gdbarch ())) | |
9843 | set_general_process (); | |
9844 | ||
9845 | rs = get_remote_state (); | |
9846 | p = rs->buf; | |
9847 | endbuf = rs->buf + get_remote_packet_size (); | |
9848 | ||
9849 | *(p++) = 'Z'; | |
9850 | *(p++) = '0'; | |
9851 | *(p++) = ','; | |
9852 | addr = (ULONGEST) remote_address_masked (addr); | |
9853 | p += hexnumstr (p, addr); | |
9854 | xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind); | |
9855 | ||
9856 | if (remote_supports_cond_breakpoints (ops)) | |
9857 | remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf); | |
9858 | ||
9859 | if (remote_can_run_breakpoint_commands (ops)) | |
9860 | remote_add_target_side_commands (gdbarch, bp_tgt, p); | |
9861 | ||
9862 | putpkt (rs->buf); | |
9863 | getpkt (&rs->buf, &rs->buf_size, 0); | |
9864 | ||
9865 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0])) | |
9866 | { | |
9867 | case PACKET_ERROR: | |
9868 | return -1; | |
9869 | case PACKET_OK: | |
9870 | return 0; | |
9871 | case PACKET_UNKNOWN: | |
9872 | break; | |
9873 | } | |
9874 | } | |
9875 | ||
9876 | /* If this breakpoint has target-side commands but this stub doesn't | |
9877 | support Z0 packets, throw error. */ | |
9878 | if (!bp_tgt->tcommands.empty ()) | |
9879 | throw_error (NOT_SUPPORTED_ERROR, _("\ | |
9880 | Target doesn't support breakpoints that have target side commands.")); | |
9881 | ||
9882 | return memory_insert_breakpoint (ops, gdbarch, bp_tgt); | |
9883 | } | |
9884 | ||
9885 | static int | |
9886 | remote_remove_breakpoint (struct target_ops *ops, | |
9887 | struct gdbarch *gdbarch, | |
9888 | struct bp_target_info *bp_tgt, | |
9889 | enum remove_bp_reason reason) | |
9890 | { | |
9891 | CORE_ADDR addr = bp_tgt->placed_address; | |
9892 | struct remote_state *rs = get_remote_state (); | |
9893 | ||
9894 | if (packet_support (PACKET_Z0) != PACKET_DISABLE) | |
9895 | { | |
9896 | char *p = rs->buf; | |
9897 | char *endbuf = rs->buf + get_remote_packet_size (); | |
9898 | ||
9899 | /* Make sure the remote is pointing at the right process, if | |
9900 | necessary. */ | |
9901 | if (!gdbarch_has_global_breakpoints (target_gdbarch ())) | |
9902 | set_general_process (); | |
9903 | ||
9904 | *(p++) = 'z'; | |
9905 | *(p++) = '0'; | |
9906 | *(p++) = ','; | |
9907 | ||
9908 | addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address); | |
9909 | p += hexnumstr (p, addr); | |
9910 | xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind); | |
9911 | ||
9912 | putpkt (rs->buf); | |
9913 | getpkt (&rs->buf, &rs->buf_size, 0); | |
9914 | ||
9915 | return (rs->buf[0] == 'E'); | |
9916 | } | |
9917 | ||
9918 | return memory_remove_breakpoint (ops, gdbarch, bp_tgt, reason); | |
9919 | } | |
9920 | ||
9921 | static enum Z_packet_type | |
9922 | watchpoint_to_Z_packet (int type) | |
9923 | { | |
9924 | switch (type) | |
9925 | { | |
9926 | case hw_write: | |
9927 | return Z_PACKET_WRITE_WP; | |
9928 | break; | |
9929 | case hw_read: | |
9930 | return Z_PACKET_READ_WP; | |
9931 | break; | |
9932 | case hw_access: | |
9933 | return Z_PACKET_ACCESS_WP; | |
9934 | break; | |
9935 | default: | |
9936 | internal_error (__FILE__, __LINE__, | |
9937 | _("hw_bp_to_z: bad watchpoint type %d"), type); | |
9938 | } | |
9939 | } | |
9940 | ||
9941 | static int | |
9942 | remote_insert_watchpoint (struct target_ops *self, CORE_ADDR addr, int len, | |
9943 | enum target_hw_bp_type type, struct expression *cond) | |
9944 | { | |
9945 | struct remote_state *rs = get_remote_state (); | |
9946 | char *endbuf = rs->buf + get_remote_packet_size (); | |
9947 | char *p; | |
9948 | enum Z_packet_type packet = watchpoint_to_Z_packet (type); | |
9949 | ||
9950 | if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE) | |
9951 | return 1; | |
9952 | ||
9953 | /* Make sure the remote is pointing at the right process, if | |
9954 | necessary. */ | |
9955 | if (!gdbarch_has_global_breakpoints (target_gdbarch ())) | |
9956 | set_general_process (); | |
9957 | ||
9958 | xsnprintf (rs->buf, endbuf - rs->buf, "Z%x,", packet); | |
9959 | p = strchr (rs->buf, '\0'); | |
9960 | addr = remote_address_masked (addr); | |
9961 | p += hexnumstr (p, (ULONGEST) addr); | |
9962 | xsnprintf (p, endbuf - p, ",%x", len); | |
9963 | ||
9964 | putpkt (rs->buf); | |
9965 | getpkt (&rs->buf, &rs->buf_size, 0); | |
9966 | ||
9967 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet])) | |
9968 | { | |
9969 | case PACKET_ERROR: | |
9970 | return -1; | |
9971 | case PACKET_UNKNOWN: | |
9972 | return 1; | |
9973 | case PACKET_OK: | |
9974 | return 0; | |
9975 | } | |
9976 | internal_error (__FILE__, __LINE__, | |
9977 | _("remote_insert_watchpoint: reached end of function")); | |
9978 | } | |
9979 | ||
9980 | static int | |
9981 | remote_watchpoint_addr_within_range (struct target_ops *target, CORE_ADDR addr, | |
9982 | CORE_ADDR start, int length) | |
9983 | { | |
9984 | CORE_ADDR diff = remote_address_masked (addr - start); | |
9985 | ||
9986 | return diff < length; | |
9987 | } | |
9988 | ||
9989 | ||
9990 | static int | |
9991 | remote_remove_watchpoint (struct target_ops *self, CORE_ADDR addr, int len, | |
9992 | enum target_hw_bp_type type, struct expression *cond) | |
9993 | { | |
9994 | struct remote_state *rs = get_remote_state (); | |
9995 | char *endbuf = rs->buf + get_remote_packet_size (); | |
9996 | char *p; | |
9997 | enum Z_packet_type packet = watchpoint_to_Z_packet (type); | |
9998 | ||
9999 | if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE) | |
10000 | return -1; | |
10001 | ||
10002 | /* Make sure the remote is pointing at the right process, if | |
10003 | necessary. */ | |
10004 | if (!gdbarch_has_global_breakpoints (target_gdbarch ())) | |
10005 | set_general_process (); | |
10006 | ||
10007 | xsnprintf (rs->buf, endbuf - rs->buf, "z%x,", packet); | |
10008 | p = strchr (rs->buf, '\0'); | |
10009 | addr = remote_address_masked (addr); | |
10010 | p += hexnumstr (p, (ULONGEST) addr); | |
10011 | xsnprintf (p, endbuf - p, ",%x", len); | |
10012 | putpkt (rs->buf); | |
10013 | getpkt (&rs->buf, &rs->buf_size, 0); | |
10014 | ||
10015 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet])) | |
10016 | { | |
10017 | case PACKET_ERROR: | |
10018 | case PACKET_UNKNOWN: | |
10019 | return -1; | |
10020 | case PACKET_OK: | |
10021 | return 0; | |
10022 | } | |
10023 | internal_error (__FILE__, __LINE__, | |
10024 | _("remote_remove_watchpoint: reached end of function")); | |
10025 | } | |
10026 | ||
10027 | ||
10028 | int remote_hw_watchpoint_limit = -1; | |
10029 | int remote_hw_watchpoint_length_limit = -1; | |
10030 | int remote_hw_breakpoint_limit = -1; | |
10031 | ||
10032 | static int | |
10033 | remote_region_ok_for_hw_watchpoint (struct target_ops *self, | |
10034 | CORE_ADDR addr, int len) | |
10035 | { | |
10036 | if (remote_hw_watchpoint_length_limit == 0) | |
10037 | return 0; | |
10038 | else if (remote_hw_watchpoint_length_limit < 0) | |
10039 | return 1; | |
10040 | else if (len <= remote_hw_watchpoint_length_limit) | |
10041 | return 1; | |
10042 | else | |
10043 | return 0; | |
10044 | } | |
10045 | ||
10046 | static int | |
10047 | remote_check_watch_resources (struct target_ops *self, | |
10048 | enum bptype type, int cnt, int ot) | |
10049 | { | |
10050 | if (type == bp_hardware_breakpoint) | |
10051 | { | |
10052 | if (remote_hw_breakpoint_limit == 0) | |
10053 | return 0; | |
10054 | else if (remote_hw_breakpoint_limit < 0) | |
10055 | return 1; | |
10056 | else if (cnt <= remote_hw_breakpoint_limit) | |
10057 | return 1; | |
10058 | } | |
10059 | else | |
10060 | { | |
10061 | if (remote_hw_watchpoint_limit == 0) | |
10062 | return 0; | |
10063 | else if (remote_hw_watchpoint_limit < 0) | |
10064 | return 1; | |
10065 | else if (ot) | |
10066 | return -1; | |
10067 | else if (cnt <= remote_hw_watchpoint_limit) | |
10068 | return 1; | |
10069 | } | |
10070 | return -1; | |
10071 | } | |
10072 | ||
10073 | /* The to_stopped_by_sw_breakpoint method of target remote. */ | |
10074 | ||
10075 | static int | |
10076 | remote_stopped_by_sw_breakpoint (struct target_ops *ops) | |
10077 | { | |
10078 | struct thread_info *thread = inferior_thread (); | |
10079 | ||
10080 | return (thread->priv != NULL | |
10081 | && thread->priv->stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT); | |
10082 | } | |
10083 | ||
10084 | /* The to_supports_stopped_by_sw_breakpoint method of target | |
10085 | remote. */ | |
10086 | ||
10087 | static int | |
10088 | remote_supports_stopped_by_sw_breakpoint (struct target_ops *ops) | |
10089 | { | |
10090 | return (packet_support (PACKET_swbreak_feature) == PACKET_ENABLE); | |
10091 | } | |
10092 | ||
10093 | /* The to_stopped_by_hw_breakpoint method of target remote. */ | |
10094 | ||
10095 | static int | |
10096 | remote_stopped_by_hw_breakpoint (struct target_ops *ops) | |
10097 | { | |
10098 | struct thread_info *thread = inferior_thread (); | |
10099 | ||
10100 | return (thread->priv != NULL | |
10101 | && thread->priv->stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT); | |
10102 | } | |
10103 | ||
10104 | /* The to_supports_stopped_by_hw_breakpoint method of target | |
10105 | remote. */ | |
10106 | ||
10107 | static int | |
10108 | remote_supports_stopped_by_hw_breakpoint (struct target_ops *ops) | |
10109 | { | |
10110 | return (packet_support (PACKET_hwbreak_feature) == PACKET_ENABLE); | |
10111 | } | |
10112 | ||
10113 | static int | |
10114 | remote_stopped_by_watchpoint (struct target_ops *ops) | |
10115 | { | |
10116 | struct thread_info *thread = inferior_thread (); | |
10117 | ||
10118 | return (thread->priv != NULL | |
10119 | && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT); | |
10120 | } | |
10121 | ||
10122 | static int | |
10123 | remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p) | |
10124 | { | |
10125 | struct thread_info *thread = inferior_thread (); | |
10126 | ||
10127 | if (thread->priv != NULL | |
10128 | && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT) | |
10129 | { | |
10130 | *addr_p = thread->priv->watch_data_address; | |
10131 | return 1; | |
10132 | } | |
10133 | ||
10134 | return 0; | |
10135 | } | |
10136 | ||
10137 | ||
10138 | static int | |
10139 | remote_insert_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch, | |
10140 | struct bp_target_info *bp_tgt) | |
10141 | { | |
10142 | CORE_ADDR addr = bp_tgt->reqstd_address; | |
10143 | struct remote_state *rs; | |
10144 | char *p, *endbuf; | |
10145 | char *message; | |
10146 | ||
10147 | if (packet_support (PACKET_Z1) == PACKET_DISABLE) | |
10148 | return -1; | |
10149 | ||
10150 | /* Make sure the remote is pointing at the right process, if | |
10151 | necessary. */ | |
10152 | if (!gdbarch_has_global_breakpoints (target_gdbarch ())) | |
10153 | set_general_process (); | |
10154 | ||
10155 | rs = get_remote_state (); | |
10156 | p = rs->buf; | |
10157 | endbuf = rs->buf + get_remote_packet_size (); | |
10158 | ||
10159 | *(p++) = 'Z'; | |
10160 | *(p++) = '1'; | |
10161 | *(p++) = ','; | |
10162 | ||
10163 | addr = remote_address_masked (addr); | |
10164 | p += hexnumstr (p, (ULONGEST) addr); | |
10165 | xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind); | |
10166 | ||
10167 | if (remote_supports_cond_breakpoints (self)) | |
10168 | remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf); | |
10169 | ||
10170 | if (remote_can_run_breakpoint_commands (self)) | |
10171 | remote_add_target_side_commands (gdbarch, bp_tgt, p); | |
10172 | ||
10173 | putpkt (rs->buf); | |
10174 | getpkt (&rs->buf, &rs->buf_size, 0); | |
10175 | ||
10176 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1])) | |
10177 | { | |
10178 | case PACKET_ERROR: | |
10179 | if (rs->buf[1] == '.') | |
10180 | { | |
10181 | message = strchr (rs->buf + 2, '.'); | |
10182 | if (message) | |
10183 | error (_("Remote failure reply: %s"), message + 1); | |
10184 | } | |
10185 | return -1; | |
10186 | case PACKET_UNKNOWN: | |
10187 | return -1; | |
10188 | case PACKET_OK: | |
10189 | return 0; | |
10190 | } | |
10191 | internal_error (__FILE__, __LINE__, | |
10192 | _("remote_insert_hw_breakpoint: reached end of function")); | |
10193 | } | |
10194 | ||
10195 | ||
10196 | static int | |
10197 | remote_remove_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch, | |
10198 | struct bp_target_info *bp_tgt) | |
10199 | { | |
10200 | CORE_ADDR addr; | |
10201 | struct remote_state *rs = get_remote_state (); | |
10202 | char *p = rs->buf; | |
10203 | char *endbuf = rs->buf + get_remote_packet_size (); | |
10204 | ||
10205 | if (packet_support (PACKET_Z1) == PACKET_DISABLE) | |
10206 | return -1; | |
10207 | ||
10208 | /* Make sure the remote is pointing at the right process, if | |
10209 | necessary. */ | |
10210 | if (!gdbarch_has_global_breakpoints (target_gdbarch ())) | |
10211 | set_general_process (); | |
10212 | ||
10213 | *(p++) = 'z'; | |
10214 | *(p++) = '1'; | |
10215 | *(p++) = ','; | |
10216 | ||
10217 | addr = remote_address_masked (bp_tgt->placed_address); | |
10218 | p += hexnumstr (p, (ULONGEST) addr); | |
10219 | xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind); | |
10220 | ||
10221 | putpkt (rs->buf); | |
10222 | getpkt (&rs->buf, &rs->buf_size, 0); | |
10223 | ||
10224 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1])) | |
10225 | { | |
10226 | case PACKET_ERROR: | |
10227 | case PACKET_UNKNOWN: | |
10228 | return -1; | |
10229 | case PACKET_OK: | |
10230 | return 0; | |
10231 | } | |
10232 | internal_error (__FILE__, __LINE__, | |
10233 | _("remote_remove_hw_breakpoint: reached end of function")); | |
10234 | } | |
10235 | ||
10236 | /* Verify memory using the "qCRC:" request. */ | |
10237 | ||
10238 | static int | |
10239 | remote_verify_memory (struct target_ops *ops, | |
10240 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
10241 | { | |
10242 | struct remote_state *rs = get_remote_state (); | |
10243 | unsigned long host_crc, target_crc; | |
10244 | char *tmp; | |
10245 | ||
10246 | /* It doesn't make sense to use qCRC if the remote target is | |
10247 | connected but not running. */ | |
10248 | if (target_has_execution && packet_support (PACKET_qCRC) != PACKET_DISABLE) | |
10249 | { | |
10250 | enum packet_result result; | |
10251 | ||
10252 | /* Make sure the remote is pointing at the right process. */ | |
10253 | set_general_process (); | |
10254 | ||
10255 | /* FIXME: assumes lma can fit into long. */ | |
10256 | xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx", | |
10257 | (long) lma, (long) size); | |
10258 | putpkt (rs->buf); | |
10259 | ||
10260 | /* Be clever; compute the host_crc before waiting for target | |
10261 | reply. */ | |
10262 | host_crc = xcrc32 (data, size, 0xffffffff); | |
10263 | ||
10264 | getpkt (&rs->buf, &rs->buf_size, 0); | |
10265 | ||
10266 | result = packet_ok (rs->buf, | |
10267 | &remote_protocol_packets[PACKET_qCRC]); | |
10268 | if (result == PACKET_ERROR) | |
10269 | return -1; | |
10270 | else if (result == PACKET_OK) | |
10271 | { | |
10272 | for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++) | |
10273 | target_crc = target_crc * 16 + fromhex (*tmp); | |
10274 | ||
10275 | return (host_crc == target_crc); | |
10276 | } | |
10277 | } | |
10278 | ||
10279 | return simple_verify_memory (ops, data, lma, size); | |
10280 | } | |
10281 | ||
10282 | /* compare-sections command | |
10283 | ||
10284 | With no arguments, compares each loadable section in the exec bfd | |
10285 | with the same memory range on the target, and reports mismatches. | |
10286 | Useful for verifying the image on the target against the exec file. */ | |
10287 | ||
10288 | static void | |
10289 | compare_sections_command (const char *args, int from_tty) | |
10290 | { | |
10291 | asection *s; | |
10292 | gdb_byte *sectdata; | |
10293 | const char *sectname; | |
10294 | bfd_size_type size; | |
10295 | bfd_vma lma; | |
10296 | int matched = 0; | |
10297 | int mismatched = 0; | |
10298 | int res; | |
10299 | int read_only = 0; | |
10300 | ||
10301 | if (!exec_bfd) | |
10302 | error (_("command cannot be used without an exec file")); | |
10303 | ||
10304 | /* Make sure the remote is pointing at the right process. */ | |
10305 | set_general_process (); | |
10306 | ||
10307 | if (args != NULL && strcmp (args, "-r") == 0) | |
10308 | { | |
10309 | read_only = 1; | |
10310 | args = NULL; | |
10311 | } | |
10312 | ||
10313 | for (s = exec_bfd->sections; s; s = s->next) | |
10314 | { | |
10315 | if (!(s->flags & SEC_LOAD)) | |
10316 | continue; /* Skip non-loadable section. */ | |
10317 | ||
10318 | if (read_only && (s->flags & SEC_READONLY) == 0) | |
10319 | continue; /* Skip writeable sections */ | |
10320 | ||
10321 | size = bfd_get_section_size (s); | |
10322 | if (size == 0) | |
10323 | continue; /* Skip zero-length section. */ | |
10324 | ||
10325 | sectname = bfd_get_section_name (exec_bfd, s); | |
10326 | if (args && strcmp (args, sectname) != 0) | |
10327 | continue; /* Not the section selected by user. */ | |
10328 | ||
10329 | matched = 1; /* Do this section. */ | |
10330 | lma = s->lma; | |
10331 | ||
10332 | gdb::byte_vector sectdata (size); | |
10333 | bfd_get_section_contents (exec_bfd, s, sectdata.data (), 0, size); | |
10334 | ||
10335 | res = target_verify_memory (sectdata.data (), lma, size); | |
10336 | ||
10337 | if (res == -1) | |
10338 | error (_("target memory fault, section %s, range %s -- %s"), sectname, | |
10339 | paddress (target_gdbarch (), lma), | |
10340 | paddress (target_gdbarch (), lma + size)); | |
10341 | ||
10342 | printf_filtered ("Section %s, range %s -- %s: ", sectname, | |
10343 | paddress (target_gdbarch (), lma), | |
10344 | paddress (target_gdbarch (), lma + size)); | |
10345 | if (res) | |
10346 | printf_filtered ("matched.\n"); | |
10347 | else | |
10348 | { | |
10349 | printf_filtered ("MIS-MATCHED!\n"); | |
10350 | mismatched++; | |
10351 | } | |
10352 | } | |
10353 | if (mismatched > 0) | |
10354 | warning (_("One or more sections of the target image does not match\n\ | |
10355 | the loaded file\n")); | |
10356 | if (args && !matched) | |
10357 | printf_filtered (_("No loaded section named '%s'.\n"), args); | |
10358 | } | |
10359 | ||
10360 | /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET | |
10361 | into remote target. The number of bytes written to the remote | |
10362 | target is returned, or -1 for error. */ | |
10363 | ||
10364 | static enum target_xfer_status | |
10365 | remote_write_qxfer (struct target_ops *ops, const char *object_name, | |
10366 | const char *annex, const gdb_byte *writebuf, | |
10367 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len, | |
10368 | struct packet_config *packet) | |
10369 | { | |
10370 | int i, buf_len; | |
10371 | ULONGEST n; | |
10372 | struct remote_state *rs = get_remote_state (); | |
10373 | int max_size = get_memory_write_packet_size (); | |
10374 | ||
10375 | if (packet->support == PACKET_DISABLE) | |
10376 | return TARGET_XFER_E_IO; | |
10377 | ||
10378 | /* Insert header. */ | |
10379 | i = snprintf (rs->buf, max_size, | |
10380 | "qXfer:%s:write:%s:%s:", | |
10381 | object_name, annex ? annex : "", | |
10382 | phex_nz (offset, sizeof offset)); | |
10383 | max_size -= (i + 1); | |
10384 | ||
10385 | /* Escape as much data as fits into rs->buf. */ | |
10386 | buf_len = remote_escape_output | |
10387 | (writebuf, len, 1, (gdb_byte *) rs->buf + i, &max_size, max_size); | |
10388 | ||
10389 | if (putpkt_binary (rs->buf, i + buf_len) < 0 | |
10390 | || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0 | |
10391 | || packet_ok (rs->buf, packet) != PACKET_OK) | |
10392 | return TARGET_XFER_E_IO; | |
10393 | ||
10394 | unpack_varlen_hex (rs->buf, &n); | |
10395 | ||
10396 | *xfered_len = n; | |
10397 | return TARGET_XFER_OK; | |
10398 | } | |
10399 | ||
10400 | /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet. | |
10401 | Data at OFFSET, of up to LEN bytes, is read into READBUF; the | |
10402 | number of bytes read is returned, or 0 for EOF, or -1 for error. | |
10403 | The number of bytes read may be less than LEN without indicating an | |
10404 | EOF. PACKET is checked and updated to indicate whether the remote | |
10405 | target supports this object. */ | |
10406 | ||
10407 | static enum target_xfer_status | |
10408 | remote_read_qxfer (struct target_ops *ops, const char *object_name, | |
10409 | const char *annex, | |
10410 | gdb_byte *readbuf, ULONGEST offset, LONGEST len, | |
10411 | ULONGEST *xfered_len, | |
10412 | struct packet_config *packet) | |
10413 | { | |
10414 | struct remote_state *rs = get_remote_state (); | |
10415 | LONGEST i, n, packet_len; | |
10416 | ||
10417 | if (packet->support == PACKET_DISABLE) | |
10418 | return TARGET_XFER_E_IO; | |
10419 | ||
10420 | /* Check whether we've cached an end-of-object packet that matches | |
10421 | this request. */ | |
10422 | if (rs->finished_object) | |
10423 | { | |
10424 | if (strcmp (object_name, rs->finished_object) == 0 | |
10425 | && strcmp (annex ? annex : "", rs->finished_annex) == 0 | |
10426 | && offset == rs->finished_offset) | |
10427 | return TARGET_XFER_EOF; | |
10428 | ||
10429 | ||
10430 | /* Otherwise, we're now reading something different. Discard | |
10431 | the cache. */ | |
10432 | xfree (rs->finished_object); | |
10433 | xfree (rs->finished_annex); | |
10434 | rs->finished_object = NULL; | |
10435 | rs->finished_annex = NULL; | |
10436 | } | |
10437 | ||
10438 | /* Request only enough to fit in a single packet. The actual data | |
10439 | may not, since we don't know how much of it will need to be escaped; | |
10440 | the target is free to respond with slightly less data. We subtract | |
10441 | five to account for the response type and the protocol frame. */ | |
10442 | n = std::min<LONGEST> (get_remote_packet_size () - 5, len); | |
10443 | snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s", | |
10444 | object_name, annex ? annex : "", | |
10445 | phex_nz (offset, sizeof offset), | |
10446 | phex_nz (n, sizeof n)); | |
10447 | i = putpkt (rs->buf); | |
10448 | if (i < 0) | |
10449 | return TARGET_XFER_E_IO; | |
10450 | ||
10451 | rs->buf[0] = '\0'; | |
10452 | packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0); | |
10453 | if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK) | |
10454 | return TARGET_XFER_E_IO; | |
10455 | ||
10456 | if (rs->buf[0] != 'l' && rs->buf[0] != 'm') | |
10457 | error (_("Unknown remote qXfer reply: %s"), rs->buf); | |
10458 | ||
10459 | /* 'm' means there is (or at least might be) more data after this | |
10460 | batch. That does not make sense unless there's at least one byte | |
10461 | of data in this reply. */ | |
10462 | if (rs->buf[0] == 'm' && packet_len == 1) | |
10463 | error (_("Remote qXfer reply contained no data.")); | |
10464 | ||
10465 | /* Got some data. */ | |
10466 | i = remote_unescape_input ((gdb_byte *) rs->buf + 1, | |
10467 | packet_len - 1, readbuf, n); | |
10468 | ||
10469 | /* 'l' is an EOF marker, possibly including a final block of data, | |
10470 | or possibly empty. If we have the final block of a non-empty | |
10471 | object, record this fact to bypass a subsequent partial read. */ | |
10472 | if (rs->buf[0] == 'l' && offset + i > 0) | |
10473 | { | |
10474 | rs->finished_object = xstrdup (object_name); | |
10475 | rs->finished_annex = xstrdup (annex ? annex : ""); | |
10476 | rs->finished_offset = offset + i; | |
10477 | } | |
10478 | ||
10479 | if (i == 0) | |
10480 | return TARGET_XFER_EOF; | |
10481 | else | |
10482 | { | |
10483 | *xfered_len = i; | |
10484 | return TARGET_XFER_OK; | |
10485 | } | |
10486 | } | |
10487 | ||
10488 | static enum target_xfer_status | |
10489 | remote_xfer_partial (struct target_ops *ops, enum target_object object, | |
10490 | const char *annex, gdb_byte *readbuf, | |
10491 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, | |
10492 | ULONGEST *xfered_len) | |
10493 | { | |
10494 | struct remote_state *rs; | |
10495 | int i; | |
10496 | char *p2; | |
10497 | char query_type; | |
10498 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
10499 | ||
10500 | set_remote_traceframe (); | |
10501 | set_general_thread (inferior_ptid); | |
10502 | ||
10503 | rs = get_remote_state (); | |
10504 | ||
10505 | /* Handle memory using the standard memory routines. */ | |
10506 | if (object == TARGET_OBJECT_MEMORY) | |
10507 | { | |
10508 | /* If the remote target is connected but not running, we should | |
10509 | pass this request down to a lower stratum (e.g. the executable | |
10510 | file). */ | |
10511 | if (!target_has_execution) | |
10512 | return TARGET_XFER_EOF; | |
10513 | ||
10514 | if (writebuf != NULL) | |
10515 | return remote_write_bytes (offset, writebuf, len, unit_size, | |
10516 | xfered_len); | |
10517 | else | |
10518 | return remote_read_bytes (ops, offset, readbuf, len, unit_size, | |
10519 | xfered_len); | |
10520 | } | |
10521 | ||
10522 | /* Handle SPU memory using qxfer packets. */ | |
10523 | if (object == TARGET_OBJECT_SPU) | |
10524 | { | |
10525 | if (readbuf) | |
10526 | return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len, | |
10527 | xfered_len, &remote_protocol_packets | |
10528 | [PACKET_qXfer_spu_read]); | |
10529 | else | |
10530 | return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len, | |
10531 | xfered_len, &remote_protocol_packets | |
10532 | [PACKET_qXfer_spu_write]); | |
10533 | } | |
10534 | ||
10535 | /* Handle extra signal info using qxfer packets. */ | |
10536 | if (object == TARGET_OBJECT_SIGNAL_INFO) | |
10537 | { | |
10538 | if (readbuf) | |
10539 | return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len, | |
10540 | xfered_len, &remote_protocol_packets | |
10541 | [PACKET_qXfer_siginfo_read]); | |
10542 | else | |
10543 | return remote_write_qxfer (ops, "siginfo", annex, | |
10544 | writebuf, offset, len, xfered_len, | |
10545 | &remote_protocol_packets | |
10546 | [PACKET_qXfer_siginfo_write]); | |
10547 | } | |
10548 | ||
10549 | if (object == TARGET_OBJECT_STATIC_TRACE_DATA) | |
10550 | { | |
10551 | if (readbuf) | |
10552 | return remote_read_qxfer (ops, "statictrace", annex, | |
10553 | readbuf, offset, len, xfered_len, | |
10554 | &remote_protocol_packets | |
10555 | [PACKET_qXfer_statictrace_read]); | |
10556 | else | |
10557 | return TARGET_XFER_E_IO; | |
10558 | } | |
10559 | ||
10560 | /* Only handle flash writes. */ | |
10561 | if (writebuf != NULL) | |
10562 | { | |
10563 | switch (object) | |
10564 | { | |
10565 | case TARGET_OBJECT_FLASH: | |
10566 | return remote_flash_write (ops, offset, len, xfered_len, | |
10567 | writebuf); | |
10568 | ||
10569 | default: | |
10570 | return TARGET_XFER_E_IO; | |
10571 | } | |
10572 | } | |
10573 | ||
10574 | /* Map pre-existing objects onto letters. DO NOT do this for new | |
10575 | objects!!! Instead specify new query packets. */ | |
10576 | switch (object) | |
10577 | { | |
10578 | case TARGET_OBJECT_AVR: | |
10579 | query_type = 'R'; | |
10580 | break; | |
10581 | ||
10582 | case TARGET_OBJECT_AUXV: | |
10583 | gdb_assert (annex == NULL); | |
10584 | return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len, | |
10585 | xfered_len, | |
10586 | &remote_protocol_packets[PACKET_qXfer_auxv]); | |
10587 | ||
10588 | case TARGET_OBJECT_AVAILABLE_FEATURES: | |
10589 | return remote_read_qxfer | |
10590 | (ops, "features", annex, readbuf, offset, len, xfered_len, | |
10591 | &remote_protocol_packets[PACKET_qXfer_features]); | |
10592 | ||
10593 | case TARGET_OBJECT_LIBRARIES: | |
10594 | return remote_read_qxfer | |
10595 | (ops, "libraries", annex, readbuf, offset, len, xfered_len, | |
10596 | &remote_protocol_packets[PACKET_qXfer_libraries]); | |
10597 | ||
10598 | case TARGET_OBJECT_LIBRARIES_SVR4: | |
10599 | return remote_read_qxfer | |
10600 | (ops, "libraries-svr4", annex, readbuf, offset, len, xfered_len, | |
10601 | &remote_protocol_packets[PACKET_qXfer_libraries_svr4]); | |
10602 | ||
10603 | case TARGET_OBJECT_MEMORY_MAP: | |
10604 | gdb_assert (annex == NULL); | |
10605 | return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len, | |
10606 | xfered_len, | |
10607 | &remote_protocol_packets[PACKET_qXfer_memory_map]); | |
10608 | ||
10609 | case TARGET_OBJECT_OSDATA: | |
10610 | /* Should only get here if we're connected. */ | |
10611 | gdb_assert (rs->remote_desc); | |
10612 | return remote_read_qxfer | |
10613 | (ops, "osdata", annex, readbuf, offset, len, xfered_len, | |
10614 | &remote_protocol_packets[PACKET_qXfer_osdata]); | |
10615 | ||
10616 | case TARGET_OBJECT_THREADS: | |
10617 | gdb_assert (annex == NULL); | |
10618 | return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len, | |
10619 | xfered_len, | |
10620 | &remote_protocol_packets[PACKET_qXfer_threads]); | |
10621 | ||
10622 | case TARGET_OBJECT_TRACEFRAME_INFO: | |
10623 | gdb_assert (annex == NULL); | |
10624 | return remote_read_qxfer | |
10625 | (ops, "traceframe-info", annex, readbuf, offset, len, xfered_len, | |
10626 | &remote_protocol_packets[PACKET_qXfer_traceframe_info]); | |
10627 | ||
10628 | case TARGET_OBJECT_FDPIC: | |
10629 | return remote_read_qxfer (ops, "fdpic", annex, readbuf, offset, len, | |
10630 | xfered_len, | |
10631 | &remote_protocol_packets[PACKET_qXfer_fdpic]); | |
10632 | ||
10633 | case TARGET_OBJECT_OPENVMS_UIB: | |
10634 | return remote_read_qxfer (ops, "uib", annex, readbuf, offset, len, | |
10635 | xfered_len, | |
10636 | &remote_protocol_packets[PACKET_qXfer_uib]); | |
10637 | ||
10638 | case TARGET_OBJECT_BTRACE: | |
10639 | return remote_read_qxfer (ops, "btrace", annex, readbuf, offset, len, | |
10640 | xfered_len, | |
10641 | &remote_protocol_packets[PACKET_qXfer_btrace]); | |
10642 | ||
10643 | case TARGET_OBJECT_BTRACE_CONF: | |
10644 | return remote_read_qxfer (ops, "btrace-conf", annex, readbuf, offset, | |
10645 | len, xfered_len, | |
10646 | &remote_protocol_packets[PACKET_qXfer_btrace_conf]); | |
10647 | ||
10648 | case TARGET_OBJECT_EXEC_FILE: | |
10649 | return remote_read_qxfer (ops, "exec-file", annex, readbuf, offset, | |
10650 | len, xfered_len, | |
10651 | &remote_protocol_packets[PACKET_qXfer_exec_file]); | |
10652 | ||
10653 | default: | |
10654 | return TARGET_XFER_E_IO; | |
10655 | } | |
10656 | ||
10657 | /* Minimum outbuf size is get_remote_packet_size (). If LEN is not | |
10658 | large enough let the caller deal with it. */ | |
10659 | if (len < get_remote_packet_size ()) | |
10660 | return TARGET_XFER_E_IO; | |
10661 | len = get_remote_packet_size (); | |
10662 | ||
10663 | /* Except for querying the minimum buffer size, target must be open. */ | |
10664 | if (!rs->remote_desc) | |
10665 | error (_("remote query is only available after target open")); | |
10666 | ||
10667 | gdb_assert (annex != NULL); | |
10668 | gdb_assert (readbuf != NULL); | |
10669 | ||
10670 | p2 = rs->buf; | |
10671 | *p2++ = 'q'; | |
10672 | *p2++ = query_type; | |
10673 | ||
10674 | /* We used one buffer char for the remote protocol q command and | |
10675 | another for the query type. As the remote protocol encapsulation | |
10676 | uses 4 chars plus one extra in case we are debugging | |
10677 | (remote_debug), we have PBUFZIZ - 7 left to pack the query | |
10678 | string. */ | |
10679 | i = 0; | |
10680 | while (annex[i] && (i < (get_remote_packet_size () - 8))) | |
10681 | { | |
10682 | /* Bad caller may have sent forbidden characters. */ | |
10683 | gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#'); | |
10684 | *p2++ = annex[i]; | |
10685 | i++; | |
10686 | } | |
10687 | *p2 = '\0'; | |
10688 | gdb_assert (annex[i] == '\0'); | |
10689 | ||
10690 | i = putpkt (rs->buf); | |
10691 | if (i < 0) | |
10692 | return TARGET_XFER_E_IO; | |
10693 | ||
10694 | getpkt (&rs->buf, &rs->buf_size, 0); | |
10695 | strcpy ((char *) readbuf, rs->buf); | |
10696 | ||
10697 | *xfered_len = strlen ((char *) readbuf); | |
10698 | return TARGET_XFER_OK; | |
10699 | } | |
10700 | ||
10701 | /* Implementation of to_get_memory_xfer_limit. */ | |
10702 | ||
10703 | static ULONGEST | |
10704 | remote_get_memory_xfer_limit (struct target_ops *ops) | |
10705 | { | |
10706 | return get_memory_write_packet_size (); | |
10707 | } | |
10708 | ||
10709 | static int | |
10710 | remote_search_memory (struct target_ops* ops, | |
10711 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
10712 | const gdb_byte *pattern, ULONGEST pattern_len, | |
10713 | CORE_ADDR *found_addrp) | |
10714 | { | |
10715 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; | |
10716 | struct remote_state *rs = get_remote_state (); | |
10717 | int max_size = get_memory_write_packet_size (); | |
10718 | struct packet_config *packet = | |
10719 | &remote_protocol_packets[PACKET_qSearch_memory]; | |
10720 | /* Number of packet bytes used to encode the pattern; | |
10721 | this could be more than PATTERN_LEN due to escape characters. */ | |
10722 | int escaped_pattern_len; | |
10723 | /* Amount of pattern that was encodable in the packet. */ | |
10724 | int used_pattern_len; | |
10725 | int i; | |
10726 | int found; | |
10727 | ULONGEST found_addr; | |
10728 | ||
10729 | /* Don't go to the target if we don't have to. | |
10730 | This is done before checking packet->support to avoid the possibility that | |
10731 | a success for this edge case means the facility works in general. */ | |
10732 | if (pattern_len > search_space_len) | |
10733 | return 0; | |
10734 | if (pattern_len == 0) | |
10735 | { | |
10736 | *found_addrp = start_addr; | |
10737 | return 1; | |
10738 | } | |
10739 | ||
10740 | /* If we already know the packet isn't supported, fall back to the simple | |
10741 | way of searching memory. */ | |
10742 | ||
10743 | if (packet_config_support (packet) == PACKET_DISABLE) | |
10744 | { | |
10745 | /* Target doesn't provided special support, fall back and use the | |
10746 | standard support (copy memory and do the search here). */ | |
10747 | return simple_search_memory (ops, start_addr, search_space_len, | |
10748 | pattern, pattern_len, found_addrp); | |
10749 | } | |
10750 | ||
10751 | /* Make sure the remote is pointing at the right process. */ | |
10752 | set_general_process (); | |
10753 | ||
10754 | /* Insert header. */ | |
10755 | i = snprintf (rs->buf, max_size, | |
10756 | "qSearch:memory:%s;%s;", | |
10757 | phex_nz (start_addr, addr_size), | |
10758 | phex_nz (search_space_len, sizeof (search_space_len))); | |
10759 | max_size -= (i + 1); | |
10760 | ||
10761 | /* Escape as much data as fits into rs->buf. */ | |
10762 | escaped_pattern_len = | |
10763 | remote_escape_output (pattern, pattern_len, 1, (gdb_byte *) rs->buf + i, | |
10764 | &used_pattern_len, max_size); | |
10765 | ||
10766 | /* Bail if the pattern is too large. */ | |
10767 | if (used_pattern_len != pattern_len) | |
10768 | error (_("Pattern is too large to transmit to remote target.")); | |
10769 | ||
10770 | if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0 | |
10771 | || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0 | |
10772 | || packet_ok (rs->buf, packet) != PACKET_OK) | |
10773 | { | |
10774 | /* The request may not have worked because the command is not | |
10775 | supported. If so, fall back to the simple way. */ | |
10776 | if (packet->support == PACKET_DISABLE) | |
10777 | { | |
10778 | return simple_search_memory (ops, start_addr, search_space_len, | |
10779 | pattern, pattern_len, found_addrp); | |
10780 | } | |
10781 | return -1; | |
10782 | } | |
10783 | ||
10784 | if (rs->buf[0] == '0') | |
10785 | found = 0; | |
10786 | else if (rs->buf[0] == '1') | |
10787 | { | |
10788 | found = 1; | |
10789 | if (rs->buf[1] != ',') | |
10790 | error (_("Unknown qSearch:memory reply: %s"), rs->buf); | |
10791 | unpack_varlen_hex (rs->buf + 2, &found_addr); | |
10792 | *found_addrp = found_addr; | |
10793 | } | |
10794 | else | |
10795 | error (_("Unknown qSearch:memory reply: %s"), rs->buf); | |
10796 | ||
10797 | return found; | |
10798 | } | |
10799 | ||
10800 | static void | |
10801 | remote_rcmd (struct target_ops *self, const char *command, | |
10802 | struct ui_file *outbuf) | |
10803 | { | |
10804 | struct remote_state *rs = get_remote_state (); | |
10805 | char *p = rs->buf; | |
10806 | ||
10807 | if (!rs->remote_desc) | |
10808 | error (_("remote rcmd is only available after target open")); | |
10809 | ||
10810 | /* Send a NULL command across as an empty command. */ | |
10811 | if (command == NULL) | |
10812 | command = ""; | |
10813 | ||
10814 | /* The query prefix. */ | |
10815 | strcpy (rs->buf, "qRcmd,"); | |
10816 | p = strchr (rs->buf, '\0'); | |
10817 | ||
10818 | if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/) | |
10819 | > get_remote_packet_size ()) | |
10820 | error (_("\"monitor\" command ``%s'' is too long."), command); | |
10821 | ||
10822 | /* Encode the actual command. */ | |
10823 | bin2hex ((const gdb_byte *) command, p, strlen (command)); | |
10824 | ||
10825 | if (putpkt (rs->buf) < 0) | |
10826 | error (_("Communication problem with target.")); | |
10827 | ||
10828 | /* get/display the response */ | |
10829 | while (1) | |
10830 | { | |
10831 | char *buf; | |
10832 | ||
10833 | /* XXX - see also remote_get_noisy_reply(). */ | |
10834 | QUIT; /* Allow user to bail out with ^C. */ | |
10835 | rs->buf[0] = '\0'; | |
10836 | if (getpkt_sane (&rs->buf, &rs->buf_size, 0) == -1) | |
10837 | { | |
10838 | /* Timeout. Continue to (try to) read responses. | |
10839 | This is better than stopping with an error, assuming the stub | |
10840 | is still executing the (long) monitor command. | |
10841 | If needed, the user can interrupt gdb using C-c, obtaining | |
10842 | an effect similar to stop on timeout. */ | |
10843 | continue; | |
10844 | } | |
10845 | buf = rs->buf; | |
10846 | if (buf[0] == '\0') | |
10847 | error (_("Target does not support this command.")); | |
10848 | if (buf[0] == 'O' && buf[1] != 'K') | |
10849 | { | |
10850 | remote_console_output (buf + 1); /* 'O' message from stub. */ | |
10851 | continue; | |
10852 | } | |
10853 | if (strcmp (buf, "OK") == 0) | |
10854 | break; | |
10855 | if (strlen (buf) == 3 && buf[0] == 'E' | |
10856 | && isdigit (buf[1]) && isdigit (buf[2])) | |
10857 | { | |
10858 | error (_("Protocol error with Rcmd")); | |
10859 | } | |
10860 | for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2) | |
10861 | { | |
10862 | char c = (fromhex (p[0]) << 4) + fromhex (p[1]); | |
10863 | ||
10864 | fputc_unfiltered (c, outbuf); | |
10865 | } | |
10866 | break; | |
10867 | } | |
10868 | } | |
10869 | ||
10870 | static std::vector<mem_region> | |
10871 | remote_memory_map (struct target_ops *ops) | |
10872 | { | |
10873 | std::vector<mem_region> result; | |
10874 | gdb::unique_xmalloc_ptr<char> text | |
10875 | = target_read_stralloc (¤t_target, TARGET_OBJECT_MEMORY_MAP, NULL); | |
10876 | ||
10877 | if (text) | |
10878 | result = parse_memory_map (text.get ()); | |
10879 | ||
10880 | return result; | |
10881 | } | |
10882 | ||
10883 | static void | |
10884 | packet_command (const char *args, int from_tty) | |
10885 | { | |
10886 | struct remote_state *rs = get_remote_state (); | |
10887 | ||
10888 | if (!rs->remote_desc) | |
10889 | error (_("command can only be used with remote target")); | |
10890 | ||
10891 | if (!args) | |
10892 | error (_("remote-packet command requires packet text as argument")); | |
10893 | ||
10894 | puts_filtered ("sending: "); | |
10895 | print_packet (args); | |
10896 | puts_filtered ("\n"); | |
10897 | putpkt (args); | |
10898 | ||
10899 | getpkt (&rs->buf, &rs->buf_size, 0); | |
10900 | puts_filtered ("received: "); | |
10901 | print_packet (rs->buf); | |
10902 | puts_filtered ("\n"); | |
10903 | } | |
10904 | ||
10905 | #if 0 | |
10906 | /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */ | |
10907 | ||
10908 | static void display_thread_info (struct gdb_ext_thread_info *info); | |
10909 | ||
10910 | static void threadset_test_cmd (char *cmd, int tty); | |
10911 | ||
10912 | static void threadalive_test (char *cmd, int tty); | |
10913 | ||
10914 | static void threadlist_test_cmd (char *cmd, int tty); | |
10915 | ||
10916 | int get_and_display_threadinfo (threadref *ref); | |
10917 | ||
10918 | static void threadinfo_test_cmd (char *cmd, int tty); | |
10919 | ||
10920 | static int thread_display_step (threadref *ref, void *context); | |
10921 | ||
10922 | static void threadlist_update_test_cmd (char *cmd, int tty); | |
10923 | ||
10924 | static void init_remote_threadtests (void); | |
10925 | ||
10926 | #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */ | |
10927 | ||
10928 | static void | |
10929 | threadset_test_cmd (char *cmd, int tty) | |
10930 | { | |
10931 | int sample_thread = SAMPLE_THREAD; | |
10932 | ||
10933 | printf_filtered (_("Remote threadset test\n")); | |
10934 | set_general_thread (sample_thread); | |
10935 | } | |
10936 | ||
10937 | ||
10938 | static void | |
10939 | threadalive_test (char *cmd, int tty) | |
10940 | { | |
10941 | int sample_thread = SAMPLE_THREAD; | |
10942 | int pid = ptid_get_pid (inferior_ptid); | |
10943 | ptid_t ptid = ptid_build (pid, sample_thread, 0); | |
10944 | ||
10945 | if (remote_thread_alive (ptid)) | |
10946 | printf_filtered ("PASS: Thread alive test\n"); | |
10947 | else | |
10948 | printf_filtered ("FAIL: Thread alive test\n"); | |
10949 | } | |
10950 | ||
10951 | void output_threadid (char *title, threadref *ref); | |
10952 | ||
10953 | void | |
10954 | output_threadid (char *title, threadref *ref) | |
10955 | { | |
10956 | char hexid[20]; | |
10957 | ||
10958 | pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */ | |
10959 | hexid[16] = 0; | |
10960 | printf_filtered ("%s %s\n", title, (&hexid[0])); | |
10961 | } | |
10962 | ||
10963 | static void | |
10964 | threadlist_test_cmd (char *cmd, int tty) | |
10965 | { | |
10966 | int startflag = 1; | |
10967 | threadref nextthread; | |
10968 | int done, result_count; | |
10969 | threadref threadlist[3]; | |
10970 | ||
10971 | printf_filtered ("Remote Threadlist test\n"); | |
10972 | if (!remote_get_threadlist (startflag, &nextthread, 3, &done, | |
10973 | &result_count, &threadlist[0])) | |
10974 | printf_filtered ("FAIL: threadlist test\n"); | |
10975 | else | |
10976 | { | |
10977 | threadref *scan = threadlist; | |
10978 | threadref *limit = scan + result_count; | |
10979 | ||
10980 | while (scan < limit) | |
10981 | output_threadid (" thread ", scan++); | |
10982 | } | |
10983 | } | |
10984 | ||
10985 | void | |
10986 | display_thread_info (struct gdb_ext_thread_info *info) | |
10987 | { | |
10988 | output_threadid ("Threadid: ", &info->threadid); | |
10989 | printf_filtered ("Name: %s\n ", info->shortname); | |
10990 | printf_filtered ("State: %s\n", info->display); | |
10991 | printf_filtered ("other: %s\n\n", info->more_display); | |
10992 | } | |
10993 | ||
10994 | int | |
10995 | get_and_display_threadinfo (threadref *ref) | |
10996 | { | |
10997 | int result; | |
10998 | int set; | |
10999 | struct gdb_ext_thread_info threadinfo; | |
11000 | ||
11001 | set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME | |
11002 | | TAG_MOREDISPLAY | TAG_DISPLAY; | |
11003 | if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo))) | |
11004 | display_thread_info (&threadinfo); | |
11005 | return result; | |
11006 | } | |
11007 | ||
11008 | static void | |
11009 | threadinfo_test_cmd (char *cmd, int tty) | |
11010 | { | |
11011 | int athread = SAMPLE_THREAD; | |
11012 | threadref thread; | |
11013 | int set; | |
11014 | ||
11015 | int_to_threadref (&thread, athread); | |
11016 | printf_filtered ("Remote Threadinfo test\n"); | |
11017 | if (!get_and_display_threadinfo (&thread)) | |
11018 | printf_filtered ("FAIL cannot get thread info\n"); | |
11019 | } | |
11020 | ||
11021 | static int | |
11022 | thread_display_step (threadref *ref, void *context) | |
11023 | { | |
11024 | /* output_threadid(" threadstep ",ref); *//* simple test */ | |
11025 | return get_and_display_threadinfo (ref); | |
11026 | } | |
11027 | ||
11028 | static void | |
11029 | threadlist_update_test_cmd (char *cmd, int tty) | |
11030 | { | |
11031 | printf_filtered ("Remote Threadlist update test\n"); | |
11032 | remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS); | |
11033 | } | |
11034 | ||
11035 | static void | |
11036 | init_remote_threadtests (void) | |
11037 | { | |
11038 | add_com ("tlist", class_obscure, threadlist_test_cmd, | |
11039 | _("Fetch and print the remote list of " | |
11040 | "thread identifiers, one pkt only")); | |
11041 | add_com ("tinfo", class_obscure, threadinfo_test_cmd, | |
11042 | _("Fetch and display info about one thread")); | |
11043 | add_com ("tset", class_obscure, threadset_test_cmd, | |
11044 | _("Test setting to a different thread")); | |
11045 | add_com ("tupd", class_obscure, threadlist_update_test_cmd, | |
11046 | _("Iterate through updating all remote thread info")); | |
11047 | add_com ("talive", class_obscure, threadalive_test, | |
11048 | _(" Remote thread alive test ")); | |
11049 | } | |
11050 | ||
11051 | #endif /* 0 */ | |
11052 | ||
11053 | /* Convert a thread ID to a string. Returns the string in a static | |
11054 | buffer. */ | |
11055 | ||
11056 | static const char * | |
11057 | remote_pid_to_str (struct target_ops *ops, ptid_t ptid) | |
11058 | { | |
11059 | static char buf[64]; | |
11060 | struct remote_state *rs = get_remote_state (); | |
11061 | ||
11062 | if (ptid_equal (ptid, null_ptid)) | |
11063 | return normal_pid_to_str (ptid); | |
11064 | else if (ptid_is_pid (ptid)) | |
11065 | { | |
11066 | /* Printing an inferior target id. */ | |
11067 | ||
11068 | /* When multi-process extensions are off, there's no way in the | |
11069 | remote protocol to know the remote process id, if there's any | |
11070 | at all. There's one exception --- when we're connected with | |
11071 | target extended-remote, and we manually attached to a process | |
11072 | with "attach PID". We don't record anywhere a flag that | |
11073 | allows us to distinguish that case from the case of | |
11074 | connecting with extended-remote and the stub already being | |
11075 | attached to a process, and reporting yes to qAttached, hence | |
11076 | no smart special casing here. */ | |
11077 | if (!remote_multi_process_p (rs)) | |
11078 | { | |
11079 | xsnprintf (buf, sizeof buf, "Remote target"); | |
11080 | return buf; | |
11081 | } | |
11082 | ||
11083 | return normal_pid_to_str (ptid); | |
11084 | } | |
11085 | else | |
11086 | { | |
11087 | if (ptid_equal (magic_null_ptid, ptid)) | |
11088 | xsnprintf (buf, sizeof buf, "Thread <main>"); | |
11089 | else if (remote_multi_process_p (rs)) | |
11090 | if (ptid_get_lwp (ptid) == 0) | |
11091 | return normal_pid_to_str (ptid); | |
11092 | else | |
11093 | xsnprintf (buf, sizeof buf, "Thread %d.%ld", | |
11094 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); | |
11095 | else | |
11096 | xsnprintf (buf, sizeof buf, "Thread %ld", | |
11097 | ptid_get_lwp (ptid)); | |
11098 | return buf; | |
11099 | } | |
11100 | } | |
11101 | ||
11102 | /* Get the address of the thread local variable in OBJFILE which is | |
11103 | stored at OFFSET within the thread local storage for thread PTID. */ | |
11104 | ||
11105 | static CORE_ADDR | |
11106 | remote_get_thread_local_address (struct target_ops *ops, | |
11107 | ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset) | |
11108 | { | |
11109 | if (packet_support (PACKET_qGetTLSAddr) != PACKET_DISABLE) | |
11110 | { | |
11111 | struct remote_state *rs = get_remote_state (); | |
11112 | char *p = rs->buf; | |
11113 | char *endp = rs->buf + get_remote_packet_size (); | |
11114 | enum packet_result result; | |
11115 | ||
11116 | strcpy (p, "qGetTLSAddr:"); | |
11117 | p += strlen (p); | |
11118 | p = write_ptid (p, endp, ptid); | |
11119 | *p++ = ','; | |
11120 | p += hexnumstr (p, offset); | |
11121 | *p++ = ','; | |
11122 | p += hexnumstr (p, lm); | |
11123 | *p++ = '\0'; | |
11124 | ||
11125 | putpkt (rs->buf); | |
11126 | getpkt (&rs->buf, &rs->buf_size, 0); | |
11127 | result = packet_ok (rs->buf, | |
11128 | &remote_protocol_packets[PACKET_qGetTLSAddr]); | |
11129 | if (result == PACKET_OK) | |
11130 | { | |
11131 | ULONGEST result; | |
11132 | ||
11133 | unpack_varlen_hex (rs->buf, &result); | |
11134 | return result; | |
11135 | } | |
11136 | else if (result == PACKET_UNKNOWN) | |
11137 | throw_error (TLS_GENERIC_ERROR, | |
11138 | _("Remote target doesn't support qGetTLSAddr packet")); | |
11139 | else | |
11140 | throw_error (TLS_GENERIC_ERROR, | |
11141 | _("Remote target failed to process qGetTLSAddr request")); | |
11142 | } | |
11143 | else | |
11144 | throw_error (TLS_GENERIC_ERROR, | |
11145 | _("TLS not supported or disabled on this target")); | |
11146 | /* Not reached. */ | |
11147 | return 0; | |
11148 | } | |
11149 | ||
11150 | /* Provide thread local base, i.e. Thread Information Block address. | |
11151 | Returns 1 if ptid is found and thread_local_base is non zero. */ | |
11152 | ||
11153 | static int | |
11154 | remote_get_tib_address (struct target_ops *self, ptid_t ptid, CORE_ADDR *addr) | |
11155 | { | |
11156 | if (packet_support (PACKET_qGetTIBAddr) != PACKET_DISABLE) | |
11157 | { | |
11158 | struct remote_state *rs = get_remote_state (); | |
11159 | char *p = rs->buf; | |
11160 | char *endp = rs->buf + get_remote_packet_size (); | |
11161 | enum packet_result result; | |
11162 | ||
11163 | strcpy (p, "qGetTIBAddr:"); | |
11164 | p += strlen (p); | |
11165 | p = write_ptid (p, endp, ptid); | |
11166 | *p++ = '\0'; | |
11167 | ||
11168 | putpkt (rs->buf); | |
11169 | getpkt (&rs->buf, &rs->buf_size, 0); | |
11170 | result = packet_ok (rs->buf, | |
11171 | &remote_protocol_packets[PACKET_qGetTIBAddr]); | |
11172 | if (result == PACKET_OK) | |
11173 | { | |
11174 | ULONGEST result; | |
11175 | ||
11176 | unpack_varlen_hex (rs->buf, &result); | |
11177 | if (addr) | |
11178 | *addr = (CORE_ADDR) result; | |
11179 | return 1; | |
11180 | } | |
11181 | else if (result == PACKET_UNKNOWN) | |
11182 | error (_("Remote target doesn't support qGetTIBAddr packet")); | |
11183 | else | |
11184 | error (_("Remote target failed to process qGetTIBAddr request")); | |
11185 | } | |
11186 | else | |
11187 | error (_("qGetTIBAddr not supported or disabled on this target")); | |
11188 | /* Not reached. */ | |
11189 | return 0; | |
11190 | } | |
11191 | ||
11192 | /* Support for inferring a target description based on the current | |
11193 | architecture and the size of a 'g' packet. While the 'g' packet | |
11194 | can have any size (since optional registers can be left off the | |
11195 | end), some sizes are easily recognizable given knowledge of the | |
11196 | approximate architecture. */ | |
11197 | ||
11198 | struct remote_g_packet_guess | |
11199 | { | |
11200 | int bytes; | |
11201 | const struct target_desc *tdesc; | |
11202 | }; | |
11203 | typedef struct remote_g_packet_guess remote_g_packet_guess_s; | |
11204 | DEF_VEC_O(remote_g_packet_guess_s); | |
11205 | ||
11206 | struct remote_g_packet_data | |
11207 | { | |
11208 | VEC(remote_g_packet_guess_s) *guesses; | |
11209 | }; | |
11210 | ||
11211 | static struct gdbarch_data *remote_g_packet_data_handle; | |
11212 | ||
11213 | static void * | |
11214 | remote_g_packet_data_init (struct obstack *obstack) | |
11215 | { | |
11216 | return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data); | |
11217 | } | |
11218 | ||
11219 | void | |
11220 | register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes, | |
11221 | const struct target_desc *tdesc) | |
11222 | { | |
11223 | struct remote_g_packet_data *data | |
11224 | = ((struct remote_g_packet_data *) | |
11225 | gdbarch_data (gdbarch, remote_g_packet_data_handle)); | |
11226 | struct remote_g_packet_guess new_guess, *guess; | |
11227 | int ix; | |
11228 | ||
11229 | gdb_assert (tdesc != NULL); | |
11230 | ||
11231 | for (ix = 0; | |
11232 | VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess); | |
11233 | ix++) | |
11234 | if (guess->bytes == bytes) | |
11235 | internal_error (__FILE__, __LINE__, | |
11236 | _("Duplicate g packet description added for size %d"), | |
11237 | bytes); | |
11238 | ||
11239 | new_guess.bytes = bytes; | |
11240 | new_guess.tdesc = tdesc; | |
11241 | VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess); | |
11242 | } | |
11243 | ||
11244 | /* Return 1 if remote_read_description would do anything on this target | |
11245 | and architecture, 0 otherwise. */ | |
11246 | ||
11247 | static int | |
11248 | remote_read_description_p (struct target_ops *target) | |
11249 | { | |
11250 | struct remote_g_packet_data *data | |
11251 | = ((struct remote_g_packet_data *) | |
11252 | gdbarch_data (target_gdbarch (), remote_g_packet_data_handle)); | |
11253 | ||
11254 | if (!VEC_empty (remote_g_packet_guess_s, data->guesses)) | |
11255 | return 1; | |
11256 | ||
11257 | return 0; | |
11258 | } | |
11259 | ||
11260 | static const struct target_desc * | |
11261 | remote_read_description (struct target_ops *target) | |
11262 | { | |
11263 | struct remote_g_packet_data *data | |
11264 | = ((struct remote_g_packet_data *) | |
11265 | gdbarch_data (target_gdbarch (), remote_g_packet_data_handle)); | |
11266 | ||
11267 | /* Do not try this during initial connection, when we do not know | |
11268 | whether there is a running but stopped thread. */ | |
11269 | if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid)) | |
11270 | return target->beneath->to_read_description (target->beneath); | |
11271 | ||
11272 | if (!VEC_empty (remote_g_packet_guess_s, data->guesses)) | |
11273 | { | |
11274 | struct remote_g_packet_guess *guess; | |
11275 | int ix; | |
11276 | int bytes = send_g_packet (); | |
11277 | ||
11278 | for (ix = 0; | |
11279 | VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess); | |
11280 | ix++) | |
11281 | if (guess->bytes == bytes) | |
11282 | return guess->tdesc; | |
11283 | ||
11284 | /* We discard the g packet. A minor optimization would be to | |
11285 | hold on to it, and fill the register cache once we have selected | |
11286 | an architecture, but it's too tricky to do safely. */ | |
11287 | } | |
11288 | ||
11289 | return target->beneath->to_read_description (target->beneath); | |
11290 | } | |
11291 | ||
11292 | /* Remote file transfer support. This is host-initiated I/O, not | |
11293 | target-initiated; for target-initiated, see remote-fileio.c. */ | |
11294 | ||
11295 | /* If *LEFT is at least the length of STRING, copy STRING to | |
11296 | *BUFFER, update *BUFFER to point to the new end of the buffer, and | |
11297 | decrease *LEFT. Otherwise raise an error. */ | |
11298 | ||
11299 | static void | |
11300 | remote_buffer_add_string (char **buffer, int *left, const char *string) | |
11301 | { | |
11302 | int len = strlen (string); | |
11303 | ||
11304 | if (len > *left) | |
11305 | error (_("Packet too long for target.")); | |
11306 | ||
11307 | memcpy (*buffer, string, len); | |
11308 | *buffer += len; | |
11309 | *left -= len; | |
11310 | ||
11311 | /* NUL-terminate the buffer as a convenience, if there is | |
11312 | room. */ | |
11313 | if (*left) | |
11314 | **buffer = '\0'; | |
11315 | } | |
11316 | ||
11317 | /* If *LEFT is large enough, hex encode LEN bytes from BYTES into | |
11318 | *BUFFER, update *BUFFER to point to the new end of the buffer, and | |
11319 | decrease *LEFT. Otherwise raise an error. */ | |
11320 | ||
11321 | static void | |
11322 | remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes, | |
11323 | int len) | |
11324 | { | |
11325 | if (2 * len > *left) | |
11326 | error (_("Packet too long for target.")); | |
11327 | ||
11328 | bin2hex (bytes, *buffer, len); | |
11329 | *buffer += 2 * len; | |
11330 | *left -= 2 * len; | |
11331 | ||
11332 | /* NUL-terminate the buffer as a convenience, if there is | |
11333 | room. */ | |
11334 | if (*left) | |
11335 | **buffer = '\0'; | |
11336 | } | |
11337 | ||
11338 | /* If *LEFT is large enough, convert VALUE to hex and add it to | |
11339 | *BUFFER, update *BUFFER to point to the new end of the buffer, and | |
11340 | decrease *LEFT. Otherwise raise an error. */ | |
11341 | ||
11342 | static void | |
11343 | remote_buffer_add_int (char **buffer, int *left, ULONGEST value) | |
11344 | { | |
11345 | int len = hexnumlen (value); | |
11346 | ||
11347 | if (len > *left) | |
11348 | error (_("Packet too long for target.")); | |
11349 | ||
11350 | hexnumstr (*buffer, value); | |
11351 | *buffer += len; | |
11352 | *left -= len; | |
11353 | ||
11354 | /* NUL-terminate the buffer as a convenience, if there is | |
11355 | room. */ | |
11356 | if (*left) | |
11357 | **buffer = '\0'; | |
11358 | } | |
11359 | ||
11360 | /* Parse an I/O result packet from BUFFER. Set RETCODE to the return | |
11361 | value, *REMOTE_ERRNO to the remote error number or zero if none | |
11362 | was included, and *ATTACHMENT to point to the start of the annex | |
11363 | if any. The length of the packet isn't needed here; there may | |
11364 | be NUL bytes in BUFFER, but they will be after *ATTACHMENT. | |
11365 | ||
11366 | Return 0 if the packet could be parsed, -1 if it could not. If | |
11367 | -1 is returned, the other variables may not be initialized. */ | |
11368 | ||
11369 | static int | |
11370 | remote_hostio_parse_result (char *buffer, int *retcode, | |
11371 | int *remote_errno, char **attachment) | |
11372 | { | |
11373 | char *p, *p2; | |
11374 | ||
11375 | *remote_errno = 0; | |
11376 | *attachment = NULL; | |
11377 | ||
11378 | if (buffer[0] != 'F') | |
11379 | return -1; | |
11380 | ||
11381 | errno = 0; | |
11382 | *retcode = strtol (&buffer[1], &p, 16); | |
11383 | if (errno != 0 || p == &buffer[1]) | |
11384 | return -1; | |
11385 | ||
11386 | /* Check for ",errno". */ | |
11387 | if (*p == ',') | |
11388 | { | |
11389 | errno = 0; | |
11390 | *remote_errno = strtol (p + 1, &p2, 16); | |
11391 | if (errno != 0 || p + 1 == p2) | |
11392 | return -1; | |
11393 | p = p2; | |
11394 | } | |
11395 | ||
11396 | /* Check for ";attachment". If there is no attachment, the | |
11397 | packet should end here. */ | |
11398 | if (*p == ';') | |
11399 | { | |
11400 | *attachment = p + 1; | |
11401 | return 0; | |
11402 | } | |
11403 | else if (*p == '\0') | |
11404 | return 0; | |
11405 | else | |
11406 | return -1; | |
11407 | } | |
11408 | ||
11409 | /* Send a prepared I/O packet to the target and read its response. | |
11410 | The prepared packet is in the global RS->BUF before this function | |
11411 | is called, and the answer is there when we return. | |
11412 | ||
11413 | COMMAND_BYTES is the length of the request to send, which may include | |
11414 | binary data. WHICH_PACKET is the packet configuration to check | |
11415 | before attempting a packet. If an error occurs, *REMOTE_ERRNO | |
11416 | is set to the error number and -1 is returned. Otherwise the value | |
11417 | returned by the function is returned. | |
11418 | ||
11419 | ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an | |
11420 | attachment is expected; an error will be reported if there's a | |
11421 | mismatch. If one is found, *ATTACHMENT will be set to point into | |
11422 | the packet buffer and *ATTACHMENT_LEN will be set to the | |
11423 | attachment's length. */ | |
11424 | ||
11425 | static int | |
11426 | remote_hostio_send_command (int command_bytes, int which_packet, | |
11427 | int *remote_errno, char **attachment, | |
11428 | int *attachment_len) | |
11429 | { | |
11430 | struct remote_state *rs = get_remote_state (); | |
11431 | int ret, bytes_read; | |
11432 | char *attachment_tmp; | |
11433 | ||
11434 | if (!rs->remote_desc | |
11435 | || packet_support (which_packet) == PACKET_DISABLE) | |
11436 | { | |
11437 | *remote_errno = FILEIO_ENOSYS; | |
11438 | return -1; | |
11439 | } | |
11440 | ||
11441 | putpkt_binary (rs->buf, command_bytes); | |
11442 | bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0); | |
11443 | ||
11444 | /* If it timed out, something is wrong. Don't try to parse the | |
11445 | buffer. */ | |
11446 | if (bytes_read < 0) | |
11447 | { | |
11448 | *remote_errno = FILEIO_EINVAL; | |
11449 | return -1; | |
11450 | } | |
11451 | ||
11452 | switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet])) | |
11453 | { | |
11454 | case PACKET_ERROR: | |
11455 | *remote_errno = FILEIO_EINVAL; | |
11456 | return -1; | |
11457 | case PACKET_UNKNOWN: | |
11458 | *remote_errno = FILEIO_ENOSYS; | |
11459 | return -1; | |
11460 | case PACKET_OK: | |
11461 | break; | |
11462 | } | |
11463 | ||
11464 | if (remote_hostio_parse_result (rs->buf, &ret, remote_errno, | |
11465 | &attachment_tmp)) | |
11466 | { | |
11467 | *remote_errno = FILEIO_EINVAL; | |
11468 | return -1; | |
11469 | } | |
11470 | ||
11471 | /* Make sure we saw an attachment if and only if we expected one. */ | |
11472 | if ((attachment_tmp == NULL && attachment != NULL) | |
11473 | || (attachment_tmp != NULL && attachment == NULL)) | |
11474 | { | |
11475 | *remote_errno = FILEIO_EINVAL; | |
11476 | return -1; | |
11477 | } | |
11478 | ||
11479 | /* If an attachment was found, it must point into the packet buffer; | |
11480 | work out how many bytes there were. */ | |
11481 | if (attachment_tmp != NULL) | |
11482 | { | |
11483 | *attachment = attachment_tmp; | |
11484 | *attachment_len = bytes_read - (*attachment - rs->buf); | |
11485 | } | |
11486 | ||
11487 | return ret; | |
11488 | } | |
11489 | ||
11490 | /* Invalidate the readahead cache. */ | |
11491 | ||
11492 | static void | |
11493 | readahead_cache_invalidate (void) | |
11494 | { | |
11495 | struct remote_state *rs = get_remote_state (); | |
11496 | ||
11497 | rs->readahead_cache.fd = -1; | |
11498 | } | |
11499 | ||
11500 | /* Invalidate the readahead cache if it is holding data for FD. */ | |
11501 | ||
11502 | static void | |
11503 | readahead_cache_invalidate_fd (int fd) | |
11504 | { | |
11505 | struct remote_state *rs = get_remote_state (); | |
11506 | ||
11507 | if (rs->readahead_cache.fd == fd) | |
11508 | rs->readahead_cache.fd = -1; | |
11509 | } | |
11510 | ||
11511 | /* Set the filesystem remote_hostio functions that take FILENAME | |
11512 | arguments will use. Return 0 on success, or -1 if an error | |
11513 | occurs (and set *REMOTE_ERRNO). */ | |
11514 | ||
11515 | static int | |
11516 | remote_hostio_set_filesystem (struct inferior *inf, int *remote_errno) | |
11517 | { | |
11518 | struct remote_state *rs = get_remote_state (); | |
11519 | int required_pid = (inf == NULL || inf->fake_pid_p) ? 0 : inf->pid; | |
11520 | char *p = rs->buf; | |
11521 | int left = get_remote_packet_size () - 1; | |
11522 | char arg[9]; | |
11523 | int ret; | |
11524 | ||
11525 | if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE) | |
11526 | return 0; | |
11527 | ||
11528 | if (rs->fs_pid != -1 && required_pid == rs->fs_pid) | |
11529 | return 0; | |
11530 | ||
11531 | remote_buffer_add_string (&p, &left, "vFile:setfs:"); | |
11532 | ||
11533 | xsnprintf (arg, sizeof (arg), "%x", required_pid); | |
11534 | remote_buffer_add_string (&p, &left, arg); | |
11535 | ||
11536 | ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_setfs, | |
11537 | remote_errno, NULL, NULL); | |
11538 | ||
11539 | if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE) | |
11540 | return 0; | |
11541 | ||
11542 | if (ret == 0) | |
11543 | rs->fs_pid = required_pid; | |
11544 | ||
11545 | return ret; | |
11546 | } | |
11547 | ||
11548 | /* Implementation of to_fileio_open. */ | |
11549 | ||
11550 | static int | |
11551 | remote_hostio_open (struct target_ops *self, | |
11552 | struct inferior *inf, const char *filename, | |
11553 | int flags, int mode, int warn_if_slow, | |
11554 | int *remote_errno) | |
11555 | { | |
11556 | struct remote_state *rs = get_remote_state (); | |
11557 | char *p = rs->buf; | |
11558 | int left = get_remote_packet_size () - 1; | |
11559 | ||
11560 | if (warn_if_slow) | |
11561 | { | |
11562 | static int warning_issued = 0; | |
11563 | ||
11564 | printf_unfiltered (_("Reading %s from remote target...\n"), | |
11565 | filename); | |
11566 | ||
11567 | if (!warning_issued) | |
11568 | { | |
11569 | warning (_("File transfers from remote targets can be slow." | |
11570 | " Use \"set sysroot\" to access files locally" | |
11571 | " instead.")); | |
11572 | warning_issued = 1; | |
11573 | } | |
11574 | } | |
11575 | ||
11576 | if (remote_hostio_set_filesystem (inf, remote_errno) != 0) | |
11577 | return -1; | |
11578 | ||
11579 | remote_buffer_add_string (&p, &left, "vFile:open:"); | |
11580 | ||
11581 | remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename, | |
11582 | strlen (filename)); | |
11583 | remote_buffer_add_string (&p, &left, ","); | |
11584 | ||
11585 | remote_buffer_add_int (&p, &left, flags); | |
11586 | remote_buffer_add_string (&p, &left, ","); | |
11587 | ||
11588 | remote_buffer_add_int (&p, &left, mode); | |
11589 | ||
11590 | return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open, | |
11591 | remote_errno, NULL, NULL); | |
11592 | } | |
11593 | ||
11594 | /* Implementation of to_fileio_pwrite. */ | |
11595 | ||
11596 | static int | |
11597 | remote_hostio_pwrite (struct target_ops *self, | |
11598 | int fd, const gdb_byte *write_buf, int len, | |
11599 | ULONGEST offset, int *remote_errno) | |
11600 | { | |
11601 | struct remote_state *rs = get_remote_state (); | |
11602 | char *p = rs->buf; | |
11603 | int left = get_remote_packet_size (); | |
11604 | int out_len; | |
11605 | ||
11606 | readahead_cache_invalidate_fd (fd); | |
11607 | ||
11608 | remote_buffer_add_string (&p, &left, "vFile:pwrite:"); | |
11609 | ||
11610 | remote_buffer_add_int (&p, &left, fd); | |
11611 | remote_buffer_add_string (&p, &left, ","); | |
11612 | ||
11613 | remote_buffer_add_int (&p, &left, offset); | |
11614 | remote_buffer_add_string (&p, &left, ","); | |
11615 | ||
11616 | p += remote_escape_output (write_buf, len, 1, (gdb_byte *) p, &out_len, | |
11617 | get_remote_packet_size () - (p - rs->buf)); | |
11618 | ||
11619 | return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite, | |
11620 | remote_errno, NULL, NULL); | |
11621 | } | |
11622 | ||
11623 | /* Helper for the implementation of to_fileio_pread. Read the file | |
11624 | from the remote side with vFile:pread. */ | |
11625 | ||
11626 | static int | |
11627 | remote_hostio_pread_vFile (struct target_ops *self, | |
11628 | int fd, gdb_byte *read_buf, int len, | |
11629 | ULONGEST offset, int *remote_errno) | |
11630 | { | |
11631 | struct remote_state *rs = get_remote_state (); | |
11632 | char *p = rs->buf; | |
11633 | char *attachment; | |
11634 | int left = get_remote_packet_size (); | |
11635 | int ret, attachment_len; | |
11636 | int read_len; | |
11637 | ||
11638 | remote_buffer_add_string (&p, &left, "vFile:pread:"); | |
11639 | ||
11640 | remote_buffer_add_int (&p, &left, fd); | |
11641 | remote_buffer_add_string (&p, &left, ","); | |
11642 | ||
11643 | remote_buffer_add_int (&p, &left, len); | |
11644 | remote_buffer_add_string (&p, &left, ","); | |
11645 | ||
11646 | remote_buffer_add_int (&p, &left, offset); | |
11647 | ||
11648 | ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread, | |
11649 | remote_errno, &attachment, | |
11650 | &attachment_len); | |
11651 | ||
11652 | if (ret < 0) | |
11653 | return ret; | |
11654 | ||
11655 | read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len, | |
11656 | read_buf, len); | |
11657 | if (read_len != ret) | |
11658 | error (_("Read returned %d, but %d bytes."), ret, (int) read_len); | |
11659 | ||
11660 | return ret; | |
11661 | } | |
11662 | ||
11663 | /* Serve pread from the readahead cache. Returns number of bytes | |
11664 | read, or 0 if the request can't be served from the cache. */ | |
11665 | ||
11666 | static int | |
11667 | remote_hostio_pread_from_cache (struct remote_state *rs, | |
11668 | int fd, gdb_byte *read_buf, size_t len, | |
11669 | ULONGEST offset) | |
11670 | { | |
11671 | struct readahead_cache *cache = &rs->readahead_cache; | |
11672 | ||
11673 | if (cache->fd == fd | |
11674 | && cache->offset <= offset | |
11675 | && offset < cache->offset + cache->bufsize) | |
11676 | { | |
11677 | ULONGEST max = cache->offset + cache->bufsize; | |
11678 | ||
11679 | if (offset + len > max) | |
11680 | len = max - offset; | |
11681 | ||
11682 | memcpy (read_buf, cache->buf + offset - cache->offset, len); | |
11683 | return len; | |
11684 | } | |
11685 | ||
11686 | return 0; | |
11687 | } | |
11688 | ||
11689 | /* Implementation of to_fileio_pread. */ | |
11690 | ||
11691 | static int | |
11692 | remote_hostio_pread (struct target_ops *self, | |
11693 | int fd, gdb_byte *read_buf, int len, | |
11694 | ULONGEST offset, int *remote_errno) | |
11695 | { | |
11696 | int ret; | |
11697 | struct remote_state *rs = get_remote_state (); | |
11698 | struct readahead_cache *cache = &rs->readahead_cache; | |
11699 | ||
11700 | ret = remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset); | |
11701 | if (ret > 0) | |
11702 | { | |
11703 | cache->hit_count++; | |
11704 | ||
11705 | if (remote_debug) | |
11706 | fprintf_unfiltered (gdb_stdlog, "readahead cache hit %s\n", | |
11707 | pulongest (cache->hit_count)); | |
11708 | return ret; | |
11709 | } | |
11710 | ||
11711 | cache->miss_count++; | |
11712 | if (remote_debug) | |
11713 | fprintf_unfiltered (gdb_stdlog, "readahead cache miss %s\n", | |
11714 | pulongest (cache->miss_count)); | |
11715 | ||
11716 | cache->fd = fd; | |
11717 | cache->offset = offset; | |
11718 | cache->bufsize = get_remote_packet_size (); | |
11719 | cache->buf = (gdb_byte *) xrealloc (cache->buf, cache->bufsize); | |
11720 | ||
11721 | ret = remote_hostio_pread_vFile (self, cache->fd, cache->buf, cache->bufsize, | |
11722 | cache->offset, remote_errno); | |
11723 | if (ret <= 0) | |
11724 | { | |
11725 | readahead_cache_invalidate_fd (fd); | |
11726 | return ret; | |
11727 | } | |
11728 | ||
11729 | cache->bufsize = ret; | |
11730 | return remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset); | |
11731 | } | |
11732 | ||
11733 | /* Implementation of to_fileio_close. */ | |
11734 | ||
11735 | static int | |
11736 | remote_hostio_close (struct target_ops *self, int fd, int *remote_errno) | |
11737 | { | |
11738 | struct remote_state *rs = get_remote_state (); | |
11739 | char *p = rs->buf; | |
11740 | int left = get_remote_packet_size () - 1; | |
11741 | ||
11742 | readahead_cache_invalidate_fd (fd); | |
11743 | ||
11744 | remote_buffer_add_string (&p, &left, "vFile:close:"); | |
11745 | ||
11746 | remote_buffer_add_int (&p, &left, fd); | |
11747 | ||
11748 | return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close, | |
11749 | remote_errno, NULL, NULL); | |
11750 | } | |
11751 | ||
11752 | /* Implementation of to_fileio_unlink. */ | |
11753 | ||
11754 | static int | |
11755 | remote_hostio_unlink (struct target_ops *self, | |
11756 | struct inferior *inf, const char *filename, | |
11757 | int *remote_errno) | |
11758 | { | |
11759 | struct remote_state *rs = get_remote_state (); | |
11760 | char *p = rs->buf; | |
11761 | int left = get_remote_packet_size () - 1; | |
11762 | ||
11763 | if (remote_hostio_set_filesystem (inf, remote_errno) != 0) | |
11764 | return -1; | |
11765 | ||
11766 | remote_buffer_add_string (&p, &left, "vFile:unlink:"); | |
11767 | ||
11768 | remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename, | |
11769 | strlen (filename)); | |
11770 | ||
11771 | return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink, | |
11772 | remote_errno, NULL, NULL); | |
11773 | } | |
11774 | ||
11775 | /* Implementation of to_fileio_readlink. */ | |
11776 | ||
11777 | static char * | |
11778 | remote_hostio_readlink (struct target_ops *self, | |
11779 | struct inferior *inf, const char *filename, | |
11780 | int *remote_errno) | |
11781 | { | |
11782 | struct remote_state *rs = get_remote_state (); | |
11783 | char *p = rs->buf; | |
11784 | char *attachment; | |
11785 | int left = get_remote_packet_size (); | |
11786 | int len, attachment_len; | |
11787 | int read_len; | |
11788 | char *ret; | |
11789 | ||
11790 | if (remote_hostio_set_filesystem (inf, remote_errno) != 0) | |
11791 | return NULL; | |
11792 | ||
11793 | remote_buffer_add_string (&p, &left, "vFile:readlink:"); | |
11794 | ||
11795 | remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename, | |
11796 | strlen (filename)); | |
11797 | ||
11798 | len = remote_hostio_send_command (p - rs->buf, PACKET_vFile_readlink, | |
11799 | remote_errno, &attachment, | |
11800 | &attachment_len); | |
11801 | ||
11802 | if (len < 0) | |
11803 | return NULL; | |
11804 | ||
11805 | ret = (char *) xmalloc (len + 1); | |
11806 | ||
11807 | read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len, | |
11808 | (gdb_byte *) ret, len); | |
11809 | if (read_len != len) | |
11810 | error (_("Readlink returned %d, but %d bytes."), len, read_len); | |
11811 | ||
11812 | ret[len] = '\0'; | |
11813 | return ret; | |
11814 | } | |
11815 | ||
11816 | /* Implementation of to_fileio_fstat. */ | |
11817 | ||
11818 | static int | |
11819 | remote_hostio_fstat (struct target_ops *self, | |
11820 | int fd, struct stat *st, | |
11821 | int *remote_errno) | |
11822 | { | |
11823 | struct remote_state *rs = get_remote_state (); | |
11824 | char *p = rs->buf; | |
11825 | int left = get_remote_packet_size (); | |
11826 | int attachment_len, ret; | |
11827 | char *attachment; | |
11828 | struct fio_stat fst; | |
11829 | int read_len; | |
11830 | ||
11831 | remote_buffer_add_string (&p, &left, "vFile:fstat:"); | |
11832 | ||
11833 | remote_buffer_add_int (&p, &left, fd); | |
11834 | ||
11835 | ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_fstat, | |
11836 | remote_errno, &attachment, | |
11837 | &attachment_len); | |
11838 | if (ret < 0) | |
11839 | { | |
11840 | if (*remote_errno != FILEIO_ENOSYS) | |
11841 | return ret; | |
11842 | ||
11843 | /* Strictly we should return -1, ENOSYS here, but when | |
11844 | "set sysroot remote:" was implemented in August 2008 | |
11845 | BFD's need for a stat function was sidestepped with | |
11846 | this hack. This was not remedied until March 2015 | |
11847 | so we retain the previous behavior to avoid breaking | |
11848 | compatibility. | |
11849 | ||
11850 | Note that the memset is a March 2015 addition; older | |
11851 | GDBs set st_size *and nothing else* so the structure | |
11852 | would have garbage in all other fields. This might | |
11853 | break something but retaining the previous behavior | |
11854 | here would be just too wrong. */ | |
11855 | ||
11856 | memset (st, 0, sizeof (struct stat)); | |
11857 | st->st_size = INT_MAX; | |
11858 | return 0; | |
11859 | } | |
11860 | ||
11861 | read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len, | |
11862 | (gdb_byte *) &fst, sizeof (fst)); | |
11863 | ||
11864 | if (read_len != ret) | |
11865 | error (_("vFile:fstat returned %d, but %d bytes."), ret, read_len); | |
11866 | ||
11867 | if (read_len != sizeof (fst)) | |
11868 | error (_("vFile:fstat returned %d bytes, but expecting %d."), | |
11869 | read_len, (int) sizeof (fst)); | |
11870 | ||
11871 | remote_fileio_to_host_stat (&fst, st); | |
11872 | ||
11873 | return 0; | |
11874 | } | |
11875 | ||
11876 | /* Implementation of to_filesystem_is_local. */ | |
11877 | ||
11878 | static int | |
11879 | remote_filesystem_is_local (struct target_ops *self) | |
11880 | { | |
11881 | /* Valgrind GDB presents itself as a remote target but works | |
11882 | on the local filesystem: it does not implement remote get | |
11883 | and users are not expected to set a sysroot. To handle | |
11884 | this case we treat the remote filesystem as local if the | |
11885 | sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub | |
11886 | does not support vFile:open. */ | |
11887 | if (strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) == 0) | |
11888 | { | |
11889 | enum packet_support ps = packet_support (PACKET_vFile_open); | |
11890 | ||
11891 | if (ps == PACKET_SUPPORT_UNKNOWN) | |
11892 | { | |
11893 | int fd, remote_errno; | |
11894 | ||
11895 | /* Try opening a file to probe support. The supplied | |
11896 | filename is irrelevant, we only care about whether | |
11897 | the stub recognizes the packet or not. */ | |
11898 | fd = remote_hostio_open (self, NULL, "just probing", | |
11899 | FILEIO_O_RDONLY, 0700, 0, | |
11900 | &remote_errno); | |
11901 | ||
11902 | if (fd >= 0) | |
11903 | remote_hostio_close (self, fd, &remote_errno); | |
11904 | ||
11905 | ps = packet_support (PACKET_vFile_open); | |
11906 | } | |
11907 | ||
11908 | if (ps == PACKET_DISABLE) | |
11909 | { | |
11910 | static int warning_issued = 0; | |
11911 | ||
11912 | if (!warning_issued) | |
11913 | { | |
11914 | warning (_("remote target does not support file" | |
11915 | " transfer, attempting to access files" | |
11916 | " from local filesystem.")); | |
11917 | warning_issued = 1; | |
11918 | } | |
11919 | ||
11920 | return 1; | |
11921 | } | |
11922 | } | |
11923 | ||
11924 | return 0; | |
11925 | } | |
11926 | ||
11927 | static int | |
11928 | remote_fileio_errno_to_host (int errnum) | |
11929 | { | |
11930 | switch (errnum) | |
11931 | { | |
11932 | case FILEIO_EPERM: | |
11933 | return EPERM; | |
11934 | case FILEIO_ENOENT: | |
11935 | return ENOENT; | |
11936 | case FILEIO_EINTR: | |
11937 | return EINTR; | |
11938 | case FILEIO_EIO: | |
11939 | return EIO; | |
11940 | case FILEIO_EBADF: | |
11941 | return EBADF; | |
11942 | case FILEIO_EACCES: | |
11943 | return EACCES; | |
11944 | case FILEIO_EFAULT: | |
11945 | return EFAULT; | |
11946 | case FILEIO_EBUSY: | |
11947 | return EBUSY; | |
11948 | case FILEIO_EEXIST: | |
11949 | return EEXIST; | |
11950 | case FILEIO_ENODEV: | |
11951 | return ENODEV; | |
11952 | case FILEIO_ENOTDIR: | |
11953 | return ENOTDIR; | |
11954 | case FILEIO_EISDIR: | |
11955 | return EISDIR; | |
11956 | case FILEIO_EINVAL: | |
11957 | return EINVAL; | |
11958 | case FILEIO_ENFILE: | |
11959 | return ENFILE; | |
11960 | case FILEIO_EMFILE: | |
11961 | return EMFILE; | |
11962 | case FILEIO_EFBIG: | |
11963 | return EFBIG; | |
11964 | case FILEIO_ENOSPC: | |
11965 | return ENOSPC; | |
11966 | case FILEIO_ESPIPE: | |
11967 | return ESPIPE; | |
11968 | case FILEIO_EROFS: | |
11969 | return EROFS; | |
11970 | case FILEIO_ENOSYS: | |
11971 | return ENOSYS; | |
11972 | case FILEIO_ENAMETOOLONG: | |
11973 | return ENAMETOOLONG; | |
11974 | } | |
11975 | return -1; | |
11976 | } | |
11977 | ||
11978 | static char * | |
11979 | remote_hostio_error (int errnum) | |
11980 | { | |
11981 | int host_error = remote_fileio_errno_to_host (errnum); | |
11982 | ||
11983 | if (host_error == -1) | |
11984 | error (_("Unknown remote I/O error %d"), errnum); | |
11985 | else | |
11986 | error (_("Remote I/O error: %s"), safe_strerror (host_error)); | |
11987 | } | |
11988 | ||
11989 | static void | |
11990 | remote_hostio_close_cleanup (void *opaque) | |
11991 | { | |
11992 | int fd = *(int *) opaque; | |
11993 | int remote_errno; | |
11994 | ||
11995 | remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno); | |
11996 | } | |
11997 | ||
11998 | void | |
11999 | remote_file_put (const char *local_file, const char *remote_file, int from_tty) | |
12000 | { | |
12001 | struct cleanup *back_to, *close_cleanup; | |
12002 | int retcode, fd, remote_errno, bytes, io_size; | |
12003 | gdb_byte *buffer; | |
12004 | int bytes_in_buffer; | |
12005 | int saw_eof; | |
12006 | ULONGEST offset; | |
12007 | struct remote_state *rs = get_remote_state (); | |
12008 | ||
12009 | if (!rs->remote_desc) | |
12010 | error (_("command can only be used with remote target")); | |
12011 | ||
12012 | gdb_file_up file = gdb_fopen_cloexec (local_file, "rb"); | |
12013 | if (file == NULL) | |
12014 | perror_with_name (local_file); | |
12015 | ||
12016 | fd = remote_hostio_open (find_target_at (process_stratum), NULL, | |
12017 | remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT | |
12018 | | FILEIO_O_TRUNC), | |
12019 | 0700, 0, &remote_errno); | |
12020 | if (fd == -1) | |
12021 | remote_hostio_error (remote_errno); | |
12022 | ||
12023 | /* Send up to this many bytes at once. They won't all fit in the | |
12024 | remote packet limit, so we'll transfer slightly fewer. */ | |
12025 | io_size = get_remote_packet_size (); | |
12026 | buffer = (gdb_byte *) xmalloc (io_size); | |
12027 | back_to = make_cleanup (xfree, buffer); | |
12028 | ||
12029 | close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd); | |
12030 | ||
12031 | bytes_in_buffer = 0; | |
12032 | saw_eof = 0; | |
12033 | offset = 0; | |
12034 | while (bytes_in_buffer || !saw_eof) | |
12035 | { | |
12036 | if (!saw_eof) | |
12037 | { | |
12038 | bytes = fread (buffer + bytes_in_buffer, 1, | |
12039 | io_size - bytes_in_buffer, | |
12040 | file.get ()); | |
12041 | if (bytes == 0) | |
12042 | { | |
12043 | if (ferror (file.get ())) | |
12044 | error (_("Error reading %s."), local_file); | |
12045 | else | |
12046 | { | |
12047 | /* EOF. Unless there is something still in the | |
12048 | buffer from the last iteration, we are done. */ | |
12049 | saw_eof = 1; | |
12050 | if (bytes_in_buffer == 0) | |
12051 | break; | |
12052 | } | |
12053 | } | |
12054 | } | |
12055 | else | |
12056 | bytes = 0; | |
12057 | ||
12058 | bytes += bytes_in_buffer; | |
12059 | bytes_in_buffer = 0; | |
12060 | ||
12061 | retcode = remote_hostio_pwrite (find_target_at (process_stratum), | |
12062 | fd, buffer, bytes, | |
12063 | offset, &remote_errno); | |
12064 | ||
12065 | if (retcode < 0) | |
12066 | remote_hostio_error (remote_errno); | |
12067 | else if (retcode == 0) | |
12068 | error (_("Remote write of %d bytes returned 0!"), bytes); | |
12069 | else if (retcode < bytes) | |
12070 | { | |
12071 | /* Short write. Save the rest of the read data for the next | |
12072 | write. */ | |
12073 | bytes_in_buffer = bytes - retcode; | |
12074 | memmove (buffer, buffer + retcode, bytes_in_buffer); | |
12075 | } | |
12076 | ||
12077 | offset += retcode; | |
12078 | } | |
12079 | ||
12080 | discard_cleanups (close_cleanup); | |
12081 | if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno)) | |
12082 | remote_hostio_error (remote_errno); | |
12083 | ||
12084 | if (from_tty) | |
12085 | printf_filtered (_("Successfully sent file \"%s\".\n"), local_file); | |
12086 | do_cleanups (back_to); | |
12087 | } | |
12088 | ||
12089 | void | |
12090 | remote_file_get (const char *remote_file, const char *local_file, int from_tty) | |
12091 | { | |
12092 | struct cleanup *back_to, *close_cleanup; | |
12093 | int fd, remote_errno, bytes, io_size; | |
12094 | gdb_byte *buffer; | |
12095 | ULONGEST offset; | |
12096 | struct remote_state *rs = get_remote_state (); | |
12097 | ||
12098 | if (!rs->remote_desc) | |
12099 | error (_("command can only be used with remote target")); | |
12100 | ||
12101 | fd = remote_hostio_open (find_target_at (process_stratum), NULL, | |
12102 | remote_file, FILEIO_O_RDONLY, 0, 0, | |
12103 | &remote_errno); | |
12104 | if (fd == -1) | |
12105 | remote_hostio_error (remote_errno); | |
12106 | ||
12107 | gdb_file_up file = gdb_fopen_cloexec (local_file, "wb"); | |
12108 | if (file == NULL) | |
12109 | perror_with_name (local_file); | |
12110 | ||
12111 | /* Send up to this many bytes at once. They won't all fit in the | |
12112 | remote packet limit, so we'll transfer slightly fewer. */ | |
12113 | io_size = get_remote_packet_size (); | |
12114 | buffer = (gdb_byte *) xmalloc (io_size); | |
12115 | back_to = make_cleanup (xfree, buffer); | |
12116 | ||
12117 | close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd); | |
12118 | ||
12119 | offset = 0; | |
12120 | while (1) | |
12121 | { | |
12122 | bytes = remote_hostio_pread (find_target_at (process_stratum), | |
12123 | fd, buffer, io_size, offset, &remote_errno); | |
12124 | if (bytes == 0) | |
12125 | /* Success, but no bytes, means end-of-file. */ | |
12126 | break; | |
12127 | if (bytes == -1) | |
12128 | remote_hostio_error (remote_errno); | |
12129 | ||
12130 | offset += bytes; | |
12131 | ||
12132 | bytes = fwrite (buffer, 1, bytes, file.get ()); | |
12133 | if (bytes == 0) | |
12134 | perror_with_name (local_file); | |
12135 | } | |
12136 | ||
12137 | discard_cleanups (close_cleanup); | |
12138 | if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno)) | |
12139 | remote_hostio_error (remote_errno); | |
12140 | ||
12141 | if (from_tty) | |
12142 | printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file); | |
12143 | do_cleanups (back_to); | |
12144 | } | |
12145 | ||
12146 | void | |
12147 | remote_file_delete (const char *remote_file, int from_tty) | |
12148 | { | |
12149 | int retcode, remote_errno; | |
12150 | struct remote_state *rs = get_remote_state (); | |
12151 | ||
12152 | if (!rs->remote_desc) | |
12153 | error (_("command can only be used with remote target")); | |
12154 | ||
12155 | retcode = remote_hostio_unlink (find_target_at (process_stratum), | |
12156 | NULL, remote_file, &remote_errno); | |
12157 | if (retcode == -1) | |
12158 | remote_hostio_error (remote_errno); | |
12159 | ||
12160 | if (from_tty) | |
12161 | printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file); | |
12162 | } | |
12163 | ||
12164 | static void | |
12165 | remote_put_command (const char *args, int from_tty) | |
12166 | { | |
12167 | if (args == NULL) | |
12168 | error_no_arg (_("file to put")); | |
12169 | ||
12170 | gdb_argv argv (args); | |
12171 | if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL) | |
12172 | error (_("Invalid parameters to remote put")); | |
12173 | ||
12174 | remote_file_put (argv[0], argv[1], from_tty); | |
12175 | } | |
12176 | ||
12177 | static void | |
12178 | remote_get_command (const char *args, int from_tty) | |
12179 | { | |
12180 | if (args == NULL) | |
12181 | error_no_arg (_("file to get")); | |
12182 | ||
12183 | gdb_argv argv (args); | |
12184 | if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL) | |
12185 | error (_("Invalid parameters to remote get")); | |
12186 | ||
12187 | remote_file_get (argv[0], argv[1], from_tty); | |
12188 | } | |
12189 | ||
12190 | static void | |
12191 | remote_delete_command (const char *args, int from_tty) | |
12192 | { | |
12193 | if (args == NULL) | |
12194 | error_no_arg (_("file to delete")); | |
12195 | ||
12196 | gdb_argv argv (args); | |
12197 | if (argv[0] == NULL || argv[1] != NULL) | |
12198 | error (_("Invalid parameters to remote delete")); | |
12199 | ||
12200 | remote_file_delete (argv[0], from_tty); | |
12201 | } | |
12202 | ||
12203 | static void | |
12204 | remote_command (const char *args, int from_tty) | |
12205 | { | |
12206 | help_list (remote_cmdlist, "remote ", all_commands, gdb_stdout); | |
12207 | } | |
12208 | ||
12209 | static int | |
12210 | remote_can_execute_reverse (struct target_ops *self) | |
12211 | { | |
12212 | if (packet_support (PACKET_bs) == PACKET_ENABLE | |
12213 | || packet_support (PACKET_bc) == PACKET_ENABLE) | |
12214 | return 1; | |
12215 | else | |
12216 | return 0; | |
12217 | } | |
12218 | ||
12219 | static int | |
12220 | remote_supports_non_stop (struct target_ops *self) | |
12221 | { | |
12222 | return 1; | |
12223 | } | |
12224 | ||
12225 | static int | |
12226 | remote_supports_disable_randomization (struct target_ops *self) | |
12227 | { | |
12228 | /* Only supported in extended mode. */ | |
12229 | return 0; | |
12230 | } | |
12231 | ||
12232 | static int | |
12233 | remote_supports_multi_process (struct target_ops *self) | |
12234 | { | |
12235 | struct remote_state *rs = get_remote_state (); | |
12236 | ||
12237 | return remote_multi_process_p (rs); | |
12238 | } | |
12239 | ||
12240 | static int | |
12241 | remote_supports_cond_tracepoints (void) | |
12242 | { | |
12243 | return packet_support (PACKET_ConditionalTracepoints) == PACKET_ENABLE; | |
12244 | } | |
12245 | ||
12246 | static int | |
12247 | remote_supports_cond_breakpoints (struct target_ops *self) | |
12248 | { | |
12249 | return packet_support (PACKET_ConditionalBreakpoints) == PACKET_ENABLE; | |
12250 | } | |
12251 | ||
12252 | static int | |
12253 | remote_supports_fast_tracepoints (void) | |
12254 | { | |
12255 | return packet_support (PACKET_FastTracepoints) == PACKET_ENABLE; | |
12256 | } | |
12257 | ||
12258 | static int | |
12259 | remote_supports_static_tracepoints (void) | |
12260 | { | |
12261 | return packet_support (PACKET_StaticTracepoints) == PACKET_ENABLE; | |
12262 | } | |
12263 | ||
12264 | static int | |
12265 | remote_supports_install_in_trace (void) | |
12266 | { | |
12267 | return packet_support (PACKET_InstallInTrace) == PACKET_ENABLE; | |
12268 | } | |
12269 | ||
12270 | static int | |
12271 | remote_supports_enable_disable_tracepoint (struct target_ops *self) | |
12272 | { | |
12273 | return (packet_support (PACKET_EnableDisableTracepoints_feature) | |
12274 | == PACKET_ENABLE); | |
12275 | } | |
12276 | ||
12277 | static int | |
12278 | remote_supports_string_tracing (struct target_ops *self) | |
12279 | { | |
12280 | return packet_support (PACKET_tracenz_feature) == PACKET_ENABLE; | |
12281 | } | |
12282 | ||
12283 | static int | |
12284 | remote_can_run_breakpoint_commands (struct target_ops *self) | |
12285 | { | |
12286 | return packet_support (PACKET_BreakpointCommands) == PACKET_ENABLE; | |
12287 | } | |
12288 | ||
12289 | static void | |
12290 | remote_trace_init (struct target_ops *self) | |
12291 | { | |
12292 | struct remote_state *rs = get_remote_state (); | |
12293 | ||
12294 | putpkt ("QTinit"); | |
12295 | remote_get_noisy_reply (); | |
12296 | if (strcmp (rs->buf, "OK") != 0) | |
12297 | error (_("Target does not support this command.")); | |
12298 | } | |
12299 | ||
12300 | static void free_actions_list (char **actions_list); | |
12301 | static void free_actions_list_cleanup_wrapper (void *); | |
12302 | static void | |
12303 | free_actions_list_cleanup_wrapper (void *al) | |
12304 | { | |
12305 | free_actions_list ((char **) al); | |
12306 | } | |
12307 | ||
12308 | static void | |
12309 | free_actions_list (char **actions_list) | |
12310 | { | |
12311 | int ndx; | |
12312 | ||
12313 | if (actions_list == 0) | |
12314 | return; | |
12315 | ||
12316 | for (ndx = 0; actions_list[ndx]; ndx++) | |
12317 | xfree (actions_list[ndx]); | |
12318 | ||
12319 | xfree (actions_list); | |
12320 | } | |
12321 | ||
12322 | /* Recursive routine to walk through command list including loops, and | |
12323 | download packets for each command. */ | |
12324 | ||
12325 | static void | |
12326 | remote_download_command_source (int num, ULONGEST addr, | |
12327 | struct command_line *cmds) | |
12328 | { | |
12329 | struct remote_state *rs = get_remote_state (); | |
12330 | struct command_line *cmd; | |
12331 | ||
12332 | for (cmd = cmds; cmd; cmd = cmd->next) | |
12333 | { | |
12334 | QUIT; /* Allow user to bail out with ^C. */ | |
12335 | strcpy (rs->buf, "QTDPsrc:"); | |
12336 | encode_source_string (num, addr, "cmd", cmd->line, | |
12337 | rs->buf + strlen (rs->buf), | |
12338 | rs->buf_size - strlen (rs->buf)); | |
12339 | putpkt (rs->buf); | |
12340 | remote_get_noisy_reply (); | |
12341 | if (strcmp (rs->buf, "OK")) | |
12342 | warning (_("Target does not support source download.")); | |
12343 | ||
12344 | if (cmd->control_type == while_control | |
12345 | || cmd->control_type == while_stepping_control) | |
12346 | { | |
12347 | remote_download_command_source (num, addr, *cmd->body_list); | |
12348 | ||
12349 | QUIT; /* Allow user to bail out with ^C. */ | |
12350 | strcpy (rs->buf, "QTDPsrc:"); | |
12351 | encode_source_string (num, addr, "cmd", "end", | |
12352 | rs->buf + strlen (rs->buf), | |
12353 | rs->buf_size - strlen (rs->buf)); | |
12354 | putpkt (rs->buf); | |
12355 | remote_get_noisy_reply (); | |
12356 | if (strcmp (rs->buf, "OK")) | |
12357 | warning (_("Target does not support source download.")); | |
12358 | } | |
12359 | } | |
12360 | } | |
12361 | ||
12362 | static void | |
12363 | remote_download_tracepoint (struct target_ops *self, struct bp_location *loc) | |
12364 | { | |
12365 | #define BUF_SIZE 2048 | |
12366 | ||
12367 | CORE_ADDR tpaddr; | |
12368 | char addrbuf[40]; | |
12369 | char buf[BUF_SIZE]; | |
12370 | char **tdp_actions; | |
12371 | char **stepping_actions; | |
12372 | int ndx; | |
12373 | struct cleanup *old_chain = NULL; | |
12374 | char *pkt; | |
12375 | struct breakpoint *b = loc->owner; | |
12376 | struct tracepoint *t = (struct tracepoint *) b; | |
12377 | struct remote_state *rs = get_remote_state (); | |
12378 | ||
12379 | encode_actions_rsp (loc, &tdp_actions, &stepping_actions); | |
12380 | old_chain = make_cleanup (free_actions_list_cleanup_wrapper, | |
12381 | tdp_actions); | |
12382 | (void) make_cleanup (free_actions_list_cleanup_wrapper, | |
12383 | stepping_actions); | |
12384 | ||
12385 | tpaddr = loc->address; | |
12386 | sprintf_vma (addrbuf, tpaddr); | |
12387 | xsnprintf (buf, BUF_SIZE, "QTDP:%x:%s:%c:%lx:%x", b->number, | |
12388 | addrbuf, /* address */ | |
12389 | (b->enable_state == bp_enabled ? 'E' : 'D'), | |
12390 | t->step_count, t->pass_count); | |
12391 | /* Fast tracepoints are mostly handled by the target, but we can | |
12392 | tell the target how big of an instruction block should be moved | |
12393 | around. */ | |
12394 | if (b->type == bp_fast_tracepoint) | |
12395 | { | |
12396 | /* Only test for support at download time; we may not know | |
12397 | target capabilities at definition time. */ | |
12398 | if (remote_supports_fast_tracepoints ()) | |
12399 | { | |
12400 | if (gdbarch_fast_tracepoint_valid_at (loc->gdbarch, tpaddr, | |
12401 | NULL)) | |
12402 | xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":F%x", | |
12403 | gdb_insn_length (loc->gdbarch, tpaddr)); | |
12404 | else | |
12405 | /* If it passed validation at definition but fails now, | |
12406 | something is very wrong. */ | |
12407 | internal_error (__FILE__, __LINE__, | |
12408 | _("Fast tracepoint not " | |
12409 | "valid during download")); | |
12410 | } | |
12411 | else | |
12412 | /* Fast tracepoints are functionally identical to regular | |
12413 | tracepoints, so don't take lack of support as a reason to | |
12414 | give up on the trace run. */ | |
12415 | warning (_("Target does not support fast tracepoints, " | |
12416 | "downloading %d as regular tracepoint"), b->number); | |
12417 | } | |
12418 | else if (b->type == bp_static_tracepoint) | |
12419 | { | |
12420 | /* Only test for support at download time; we may not know | |
12421 | target capabilities at definition time. */ | |
12422 | if (remote_supports_static_tracepoints ()) | |
12423 | { | |
12424 | struct static_tracepoint_marker marker; | |
12425 | ||
12426 | if (target_static_tracepoint_marker_at (tpaddr, &marker)) | |
12427 | strcat (buf, ":S"); | |
12428 | else | |
12429 | error (_("Static tracepoint not valid during download")); | |
12430 | } | |
12431 | else | |
12432 | /* Fast tracepoints are functionally identical to regular | |
12433 | tracepoints, so don't take lack of support as a reason | |
12434 | to give up on the trace run. */ | |
12435 | error (_("Target does not support static tracepoints")); | |
12436 | } | |
12437 | /* If the tracepoint has a conditional, make it into an agent | |
12438 | expression and append to the definition. */ | |
12439 | if (loc->cond) | |
12440 | { | |
12441 | /* Only test support at download time, we may not know target | |
12442 | capabilities at definition time. */ | |
12443 | if (remote_supports_cond_tracepoints ()) | |
12444 | { | |
12445 | agent_expr_up aexpr = gen_eval_for_expr (tpaddr, loc->cond.get ()); | |
12446 | xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":X%x,", | |
12447 | aexpr->len); | |
12448 | pkt = buf + strlen (buf); | |
12449 | for (ndx = 0; ndx < aexpr->len; ++ndx) | |
12450 | pkt = pack_hex_byte (pkt, aexpr->buf[ndx]); | |
12451 | *pkt = '\0'; | |
12452 | } | |
12453 | else | |
12454 | warning (_("Target does not support conditional tracepoints, " | |
12455 | "ignoring tp %d cond"), b->number); | |
12456 | } | |
12457 | ||
12458 | if (b->commands || *default_collect) | |
12459 | strcat (buf, "-"); | |
12460 | putpkt (buf); | |
12461 | remote_get_noisy_reply (); | |
12462 | if (strcmp (rs->buf, "OK")) | |
12463 | error (_("Target does not support tracepoints.")); | |
12464 | ||
12465 | /* do_single_steps (t); */ | |
12466 | if (tdp_actions) | |
12467 | { | |
12468 | for (ndx = 0; tdp_actions[ndx]; ndx++) | |
12469 | { | |
12470 | QUIT; /* Allow user to bail out with ^C. */ | |
12471 | xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%c", | |
12472 | b->number, addrbuf, /* address */ | |
12473 | tdp_actions[ndx], | |
12474 | ((tdp_actions[ndx + 1] || stepping_actions) | |
12475 | ? '-' : 0)); | |
12476 | putpkt (buf); | |
12477 | remote_get_noisy_reply (); | |
12478 | if (strcmp (rs->buf, "OK")) | |
12479 | error (_("Error on target while setting tracepoints.")); | |
12480 | } | |
12481 | } | |
12482 | if (stepping_actions) | |
12483 | { | |
12484 | for (ndx = 0; stepping_actions[ndx]; ndx++) | |
12485 | { | |
12486 | QUIT; /* Allow user to bail out with ^C. */ | |
12487 | xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%s%s", | |
12488 | b->number, addrbuf, /* address */ | |
12489 | ((ndx == 0) ? "S" : ""), | |
12490 | stepping_actions[ndx], | |
12491 | (stepping_actions[ndx + 1] ? "-" : "")); | |
12492 | putpkt (buf); | |
12493 | remote_get_noisy_reply (); | |
12494 | if (strcmp (rs->buf, "OK")) | |
12495 | error (_("Error on target while setting tracepoints.")); | |
12496 | } | |
12497 | } | |
12498 | ||
12499 | if (packet_support (PACKET_TracepointSource) == PACKET_ENABLE) | |
12500 | { | |
12501 | if (b->location != NULL) | |
12502 | { | |
12503 | strcpy (buf, "QTDPsrc:"); | |
12504 | encode_source_string (b->number, loc->address, "at", | |
12505 | event_location_to_string (b->location.get ()), | |
12506 | buf + strlen (buf), 2048 - strlen (buf)); | |
12507 | putpkt (buf); | |
12508 | remote_get_noisy_reply (); | |
12509 | if (strcmp (rs->buf, "OK")) | |
12510 | warning (_("Target does not support source download.")); | |
12511 | } | |
12512 | if (b->cond_string) | |
12513 | { | |
12514 | strcpy (buf, "QTDPsrc:"); | |
12515 | encode_source_string (b->number, loc->address, | |
12516 | "cond", b->cond_string, buf + strlen (buf), | |
12517 | 2048 - strlen (buf)); | |
12518 | putpkt (buf); | |
12519 | remote_get_noisy_reply (); | |
12520 | if (strcmp (rs->buf, "OK")) | |
12521 | warning (_("Target does not support source download.")); | |
12522 | } | |
12523 | remote_download_command_source (b->number, loc->address, | |
12524 | breakpoint_commands (b)); | |
12525 | } | |
12526 | ||
12527 | do_cleanups (old_chain); | |
12528 | } | |
12529 | ||
12530 | static int | |
12531 | remote_can_download_tracepoint (struct target_ops *self) | |
12532 | { | |
12533 | struct remote_state *rs = get_remote_state (); | |
12534 | struct trace_status *ts; | |
12535 | int status; | |
12536 | ||
12537 | /* Don't try to install tracepoints until we've relocated our | |
12538 | symbols, and fetched and merged the target's tracepoint list with | |
12539 | ours. */ | |
12540 | if (rs->starting_up) | |
12541 | return 0; | |
12542 | ||
12543 | ts = current_trace_status (); | |
12544 | status = remote_get_trace_status (self, ts); | |
12545 | ||
12546 | if (status == -1 || !ts->running_known || !ts->running) | |
12547 | return 0; | |
12548 | ||
12549 | /* If we are in a tracing experiment, but remote stub doesn't support | |
12550 | installing tracepoint in trace, we have to return. */ | |
12551 | if (!remote_supports_install_in_trace ()) | |
12552 | return 0; | |
12553 | ||
12554 | return 1; | |
12555 | } | |
12556 | ||
12557 | ||
12558 | static void | |
12559 | remote_download_trace_state_variable (struct target_ops *self, | |
12560 | struct trace_state_variable *tsv) | |
12561 | { | |
12562 | struct remote_state *rs = get_remote_state (); | |
12563 | char *p; | |
12564 | ||
12565 | xsnprintf (rs->buf, get_remote_packet_size (), "QTDV:%x:%s:%x:", | |
12566 | tsv->number, phex ((ULONGEST) tsv->initial_value, 8), | |
12567 | tsv->builtin); | |
12568 | p = rs->buf + strlen (rs->buf); | |
12569 | if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ()) | |
12570 | error (_("Trace state variable name too long for tsv definition packet")); | |
12571 | p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, strlen (tsv->name)); | |
12572 | *p++ = '\0'; | |
12573 | putpkt (rs->buf); | |
12574 | remote_get_noisy_reply (); | |
12575 | if (*rs->buf == '\0') | |
12576 | error (_("Target does not support this command.")); | |
12577 | if (strcmp (rs->buf, "OK") != 0) | |
12578 | error (_("Error on target while downloading trace state variable.")); | |
12579 | } | |
12580 | ||
12581 | static void | |
12582 | remote_enable_tracepoint (struct target_ops *self, | |
12583 | struct bp_location *location) | |
12584 | { | |
12585 | struct remote_state *rs = get_remote_state (); | |
12586 | char addr_buf[40]; | |
12587 | ||
12588 | sprintf_vma (addr_buf, location->address); | |
12589 | xsnprintf (rs->buf, get_remote_packet_size (), "QTEnable:%x:%s", | |
12590 | location->owner->number, addr_buf); | |
12591 | putpkt (rs->buf); | |
12592 | remote_get_noisy_reply (); | |
12593 | if (*rs->buf == '\0') | |
12594 | error (_("Target does not support enabling tracepoints while a trace run is ongoing.")); | |
12595 | if (strcmp (rs->buf, "OK") != 0) | |
12596 | error (_("Error on target while enabling tracepoint.")); | |
12597 | } | |
12598 | ||
12599 | static void | |
12600 | remote_disable_tracepoint (struct target_ops *self, | |
12601 | struct bp_location *location) | |
12602 | { | |
12603 | struct remote_state *rs = get_remote_state (); | |
12604 | char addr_buf[40]; | |
12605 | ||
12606 | sprintf_vma (addr_buf, location->address); | |
12607 | xsnprintf (rs->buf, get_remote_packet_size (), "QTDisable:%x:%s", | |
12608 | location->owner->number, addr_buf); | |
12609 | putpkt (rs->buf); | |
12610 | remote_get_noisy_reply (); | |
12611 | if (*rs->buf == '\0') | |
12612 | error (_("Target does not support disabling tracepoints while a trace run is ongoing.")); | |
12613 | if (strcmp (rs->buf, "OK") != 0) | |
12614 | error (_("Error on target while disabling tracepoint.")); | |
12615 | } | |
12616 | ||
12617 | static void | |
12618 | remote_trace_set_readonly_regions (struct target_ops *self) | |
12619 | { | |
12620 | asection *s; | |
12621 | bfd *abfd = NULL; | |
12622 | bfd_size_type size; | |
12623 | bfd_vma vma; | |
12624 | int anysecs = 0; | |
12625 | int offset = 0; | |
12626 | ||
12627 | if (!exec_bfd) | |
12628 | return; /* No information to give. */ | |
12629 | ||
12630 | struct remote_state *rs = get_remote_state (); | |
12631 | ||
12632 | strcpy (rs->buf, "QTro"); | |
12633 | offset = strlen (rs->buf); | |
12634 | for (s = exec_bfd->sections; s; s = s->next) | |
12635 | { | |
12636 | char tmp1[40], tmp2[40]; | |
12637 | int sec_length; | |
12638 | ||
12639 | if ((s->flags & SEC_LOAD) == 0 || | |
12640 | /* (s->flags & SEC_CODE) == 0 || */ | |
12641 | (s->flags & SEC_READONLY) == 0) | |
12642 | continue; | |
12643 | ||
12644 | anysecs = 1; | |
12645 | vma = bfd_get_section_vma (abfd, s); | |
12646 | size = bfd_get_section_size (s); | |
12647 | sprintf_vma (tmp1, vma); | |
12648 | sprintf_vma (tmp2, vma + size); | |
12649 | sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2); | |
12650 | if (offset + sec_length + 1 > rs->buf_size) | |
12651 | { | |
12652 | if (packet_support (PACKET_qXfer_traceframe_info) != PACKET_ENABLE) | |
12653 | warning (_("\ | |
12654 | Too many sections for read-only sections definition packet.")); | |
12655 | break; | |
12656 | } | |
12657 | xsnprintf (rs->buf + offset, rs->buf_size - offset, ":%s,%s", | |
12658 | tmp1, tmp2); | |
12659 | offset += sec_length; | |
12660 | } | |
12661 | if (anysecs) | |
12662 | { | |
12663 | putpkt (rs->buf); | |
12664 | getpkt (&rs->buf, &rs->buf_size, 0); | |
12665 | } | |
12666 | } | |
12667 | ||
12668 | static void | |
12669 | remote_trace_start (struct target_ops *self) | |
12670 | { | |
12671 | struct remote_state *rs = get_remote_state (); | |
12672 | ||
12673 | putpkt ("QTStart"); | |
12674 | remote_get_noisy_reply (); | |
12675 | if (*rs->buf == '\0') | |
12676 | error (_("Target does not support this command.")); | |
12677 | if (strcmp (rs->buf, "OK") != 0) | |
12678 | error (_("Bogus reply from target: %s"), rs->buf); | |
12679 | } | |
12680 | ||
12681 | static int | |
12682 | remote_get_trace_status (struct target_ops *self, struct trace_status *ts) | |
12683 | { | |
12684 | /* Initialize it just to avoid a GCC false warning. */ | |
12685 | char *p = NULL; | |
12686 | /* FIXME we need to get register block size some other way. */ | |
12687 | extern int trace_regblock_size; | |
12688 | enum packet_result result; | |
12689 | struct remote_state *rs = get_remote_state (); | |
12690 | ||
12691 | if (packet_support (PACKET_qTStatus) == PACKET_DISABLE) | |
12692 | return -1; | |
12693 | ||
12694 | trace_regblock_size | |
12695 | = get_remote_arch_state (target_gdbarch ())->sizeof_g_packet; | |
12696 | ||
12697 | putpkt ("qTStatus"); | |
12698 | ||
12699 | TRY | |
12700 | { | |
12701 | p = remote_get_noisy_reply (); | |
12702 | } | |
12703 | CATCH (ex, RETURN_MASK_ERROR) | |
12704 | { | |
12705 | if (ex.error != TARGET_CLOSE_ERROR) | |
12706 | { | |
12707 | exception_fprintf (gdb_stderr, ex, "qTStatus: "); | |
12708 | return -1; | |
12709 | } | |
12710 | throw_exception (ex); | |
12711 | } | |
12712 | END_CATCH | |
12713 | ||
12714 | result = packet_ok (p, &remote_protocol_packets[PACKET_qTStatus]); | |
12715 | ||
12716 | /* If the remote target doesn't do tracing, flag it. */ | |
12717 | if (result == PACKET_UNKNOWN) | |
12718 | return -1; | |
12719 | ||
12720 | /* We're working with a live target. */ | |
12721 | ts->filename = NULL; | |
12722 | ||
12723 | if (*p++ != 'T') | |
12724 | error (_("Bogus trace status reply from target: %s"), rs->buf); | |
12725 | ||
12726 | /* Function 'parse_trace_status' sets default value of each field of | |
12727 | 'ts' at first, so we don't have to do it here. */ | |
12728 | parse_trace_status (p, ts); | |
12729 | ||
12730 | return ts->running; | |
12731 | } | |
12732 | ||
12733 | static void | |
12734 | remote_get_tracepoint_status (struct target_ops *self, struct breakpoint *bp, | |
12735 | struct uploaded_tp *utp) | |
12736 | { | |
12737 | struct remote_state *rs = get_remote_state (); | |
12738 | char *reply; | |
12739 | struct bp_location *loc; | |
12740 | struct tracepoint *tp = (struct tracepoint *) bp; | |
12741 | size_t size = get_remote_packet_size (); | |
12742 | ||
12743 | if (tp) | |
12744 | { | |
12745 | tp->hit_count = 0; | |
12746 | tp->traceframe_usage = 0; | |
12747 | for (loc = tp->loc; loc; loc = loc->next) | |
12748 | { | |
12749 | /* If the tracepoint was never downloaded, don't go asking for | |
12750 | any status. */ | |
12751 | if (tp->number_on_target == 0) | |
12752 | continue; | |
12753 | xsnprintf (rs->buf, size, "qTP:%x:%s", tp->number_on_target, | |
12754 | phex_nz (loc->address, 0)); | |
12755 | putpkt (rs->buf); | |
12756 | reply = remote_get_noisy_reply (); | |
12757 | if (reply && *reply) | |
12758 | { | |
12759 | if (*reply == 'V') | |
12760 | parse_tracepoint_status (reply + 1, bp, utp); | |
12761 | } | |
12762 | } | |
12763 | } | |
12764 | else if (utp) | |
12765 | { | |
12766 | utp->hit_count = 0; | |
12767 | utp->traceframe_usage = 0; | |
12768 | xsnprintf (rs->buf, size, "qTP:%x:%s", utp->number, | |
12769 | phex_nz (utp->addr, 0)); | |
12770 | putpkt (rs->buf); | |
12771 | reply = remote_get_noisy_reply (); | |
12772 | if (reply && *reply) | |
12773 | { | |
12774 | if (*reply == 'V') | |
12775 | parse_tracepoint_status (reply + 1, bp, utp); | |
12776 | } | |
12777 | } | |
12778 | } | |
12779 | ||
12780 | static void | |
12781 | remote_trace_stop (struct target_ops *self) | |
12782 | { | |
12783 | struct remote_state *rs = get_remote_state (); | |
12784 | ||
12785 | putpkt ("QTStop"); | |
12786 | remote_get_noisy_reply (); | |
12787 | if (*rs->buf == '\0') | |
12788 | error (_("Target does not support this command.")); | |
12789 | if (strcmp (rs->buf, "OK") != 0) | |
12790 | error (_("Bogus reply from target: %s"), rs->buf); | |
12791 | } | |
12792 | ||
12793 | static int | |
12794 | remote_trace_find (struct target_ops *self, | |
12795 | enum trace_find_type type, int num, | |
12796 | CORE_ADDR addr1, CORE_ADDR addr2, | |
12797 | int *tpp) | |
12798 | { | |
12799 | struct remote_state *rs = get_remote_state (); | |
12800 | char *endbuf = rs->buf + get_remote_packet_size (); | |
12801 | char *p, *reply; | |
12802 | int target_frameno = -1, target_tracept = -1; | |
12803 | ||
12804 | /* Lookups other than by absolute frame number depend on the current | |
12805 | trace selected, so make sure it is correct on the remote end | |
12806 | first. */ | |
12807 | if (type != tfind_number) | |
12808 | set_remote_traceframe (); | |
12809 | ||
12810 | p = rs->buf; | |
12811 | strcpy (p, "QTFrame:"); | |
12812 | p = strchr (p, '\0'); | |
12813 | switch (type) | |
12814 | { | |
12815 | case tfind_number: | |
12816 | xsnprintf (p, endbuf - p, "%x", num); | |
12817 | break; | |
12818 | case tfind_pc: | |
12819 | xsnprintf (p, endbuf - p, "pc:%s", phex_nz (addr1, 0)); | |
12820 | break; | |
12821 | case tfind_tp: | |
12822 | xsnprintf (p, endbuf - p, "tdp:%x", num); | |
12823 | break; | |
12824 | case tfind_range: | |
12825 | xsnprintf (p, endbuf - p, "range:%s:%s", phex_nz (addr1, 0), | |
12826 | phex_nz (addr2, 0)); | |
12827 | break; | |
12828 | case tfind_outside: | |
12829 | xsnprintf (p, endbuf - p, "outside:%s:%s", phex_nz (addr1, 0), | |
12830 | phex_nz (addr2, 0)); | |
12831 | break; | |
12832 | default: | |
12833 | error (_("Unknown trace find type %d"), type); | |
12834 | } | |
12835 | ||
12836 | putpkt (rs->buf); | |
12837 | reply = remote_get_noisy_reply (); | |
12838 | if (*reply == '\0') | |
12839 | error (_("Target does not support this command.")); | |
12840 | ||
12841 | while (reply && *reply) | |
12842 | switch (*reply) | |
12843 | { | |
12844 | case 'F': | |
12845 | p = ++reply; | |
12846 | target_frameno = (int) strtol (p, &reply, 16); | |
12847 | if (reply == p) | |
12848 | error (_("Unable to parse trace frame number")); | |
12849 | /* Don't update our remote traceframe number cache on failure | |
12850 | to select a remote traceframe. */ | |
12851 | if (target_frameno == -1) | |
12852 | return -1; | |
12853 | break; | |
12854 | case 'T': | |
12855 | p = ++reply; | |
12856 | target_tracept = (int) strtol (p, &reply, 16); | |
12857 | if (reply == p) | |
12858 | error (_("Unable to parse tracepoint number")); | |
12859 | break; | |
12860 | case 'O': /* "OK"? */ | |
12861 | if (reply[1] == 'K' && reply[2] == '\0') | |
12862 | reply += 2; | |
12863 | else | |
12864 | error (_("Bogus reply from target: %s"), reply); | |
12865 | break; | |
12866 | default: | |
12867 | error (_("Bogus reply from target: %s"), reply); | |
12868 | } | |
12869 | if (tpp) | |
12870 | *tpp = target_tracept; | |
12871 | ||
12872 | rs->remote_traceframe_number = target_frameno; | |
12873 | return target_frameno; | |
12874 | } | |
12875 | ||
12876 | static int | |
12877 | remote_get_trace_state_variable_value (struct target_ops *self, | |
12878 | int tsvnum, LONGEST *val) | |
12879 | { | |
12880 | struct remote_state *rs = get_remote_state (); | |
12881 | char *reply; | |
12882 | ULONGEST uval; | |
12883 | ||
12884 | set_remote_traceframe (); | |
12885 | ||
12886 | xsnprintf (rs->buf, get_remote_packet_size (), "qTV:%x", tsvnum); | |
12887 | putpkt (rs->buf); | |
12888 | reply = remote_get_noisy_reply (); | |
12889 | if (reply && *reply) | |
12890 | { | |
12891 | if (*reply == 'V') | |
12892 | { | |
12893 | unpack_varlen_hex (reply + 1, &uval); | |
12894 | *val = (LONGEST) uval; | |
12895 | return 1; | |
12896 | } | |
12897 | } | |
12898 | return 0; | |
12899 | } | |
12900 | ||
12901 | static int | |
12902 | remote_save_trace_data (struct target_ops *self, const char *filename) | |
12903 | { | |
12904 | struct remote_state *rs = get_remote_state (); | |
12905 | char *p, *reply; | |
12906 | ||
12907 | p = rs->buf; | |
12908 | strcpy (p, "QTSave:"); | |
12909 | p += strlen (p); | |
12910 | if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ()) | |
12911 | error (_("Remote file name too long for trace save packet")); | |
12912 | p += 2 * bin2hex ((gdb_byte *) filename, p, strlen (filename)); | |
12913 | *p++ = '\0'; | |
12914 | putpkt (rs->buf); | |
12915 | reply = remote_get_noisy_reply (); | |
12916 | if (*reply == '\0') | |
12917 | error (_("Target does not support this command.")); | |
12918 | if (strcmp (reply, "OK") != 0) | |
12919 | error (_("Bogus reply from target: %s"), reply); | |
12920 | return 0; | |
12921 | } | |
12922 | ||
12923 | /* This is basically a memory transfer, but needs to be its own packet | |
12924 | because we don't know how the target actually organizes its trace | |
12925 | memory, plus we want to be able to ask for as much as possible, but | |
12926 | not be unhappy if we don't get as much as we ask for. */ | |
12927 | ||
12928 | static LONGEST | |
12929 | remote_get_raw_trace_data (struct target_ops *self, | |
12930 | gdb_byte *buf, ULONGEST offset, LONGEST len) | |
12931 | { | |
12932 | struct remote_state *rs = get_remote_state (); | |
12933 | char *reply; | |
12934 | char *p; | |
12935 | int rslt; | |
12936 | ||
12937 | p = rs->buf; | |
12938 | strcpy (p, "qTBuffer:"); | |
12939 | p += strlen (p); | |
12940 | p += hexnumstr (p, offset); | |
12941 | *p++ = ','; | |
12942 | p += hexnumstr (p, len); | |
12943 | *p++ = '\0'; | |
12944 | ||
12945 | putpkt (rs->buf); | |
12946 | reply = remote_get_noisy_reply (); | |
12947 | if (reply && *reply) | |
12948 | { | |
12949 | /* 'l' by itself means we're at the end of the buffer and | |
12950 | there is nothing more to get. */ | |
12951 | if (*reply == 'l') | |
12952 | return 0; | |
12953 | ||
12954 | /* Convert the reply into binary. Limit the number of bytes to | |
12955 | convert according to our passed-in buffer size, rather than | |
12956 | what was returned in the packet; if the target is | |
12957 | unexpectedly generous and gives us a bigger reply than we | |
12958 | asked for, we don't want to crash. */ | |
12959 | rslt = hex2bin (reply, buf, len); | |
12960 | return rslt; | |
12961 | } | |
12962 | ||
12963 | /* Something went wrong, flag as an error. */ | |
12964 | return -1; | |
12965 | } | |
12966 | ||
12967 | static void | |
12968 | remote_set_disconnected_tracing (struct target_ops *self, int val) | |
12969 | { | |
12970 | struct remote_state *rs = get_remote_state (); | |
12971 | ||
12972 | if (packet_support (PACKET_DisconnectedTracing_feature) == PACKET_ENABLE) | |
12973 | { | |
12974 | char *reply; | |
12975 | ||
12976 | xsnprintf (rs->buf, get_remote_packet_size (), "QTDisconnected:%x", val); | |
12977 | putpkt (rs->buf); | |
12978 | reply = remote_get_noisy_reply (); | |
12979 | if (*reply == '\0') | |
12980 | error (_("Target does not support this command.")); | |
12981 | if (strcmp (reply, "OK") != 0) | |
12982 | error (_("Bogus reply from target: %s"), reply); | |
12983 | } | |
12984 | else if (val) | |
12985 | warning (_("Target does not support disconnected tracing.")); | |
12986 | } | |
12987 | ||
12988 | static int | |
12989 | remote_core_of_thread (struct target_ops *ops, ptid_t ptid) | |
12990 | { | |
12991 | struct thread_info *info = find_thread_ptid (ptid); | |
12992 | ||
12993 | if (info && info->priv) | |
12994 | return info->priv->core; | |
12995 | return -1; | |
12996 | } | |
12997 | ||
12998 | static void | |
12999 | remote_set_circular_trace_buffer (struct target_ops *self, int val) | |
13000 | { | |
13001 | struct remote_state *rs = get_remote_state (); | |
13002 | char *reply; | |
13003 | ||
13004 | xsnprintf (rs->buf, get_remote_packet_size (), "QTBuffer:circular:%x", val); | |
13005 | putpkt (rs->buf); | |
13006 | reply = remote_get_noisy_reply (); | |
13007 | if (*reply == '\0') | |
13008 | error (_("Target does not support this command.")); | |
13009 | if (strcmp (reply, "OK") != 0) | |
13010 | error (_("Bogus reply from target: %s"), reply); | |
13011 | } | |
13012 | ||
13013 | static traceframe_info_up | |
13014 | remote_traceframe_info (struct target_ops *self) | |
13015 | { | |
13016 | gdb::unique_xmalloc_ptr<char> text | |
13017 | = target_read_stralloc (¤t_target, TARGET_OBJECT_TRACEFRAME_INFO, | |
13018 | NULL); | |
13019 | if (text != NULL) | |
13020 | return parse_traceframe_info (text.get ()); | |
13021 | ||
13022 | return NULL; | |
13023 | } | |
13024 | ||
13025 | /* Handle the qTMinFTPILen packet. Returns the minimum length of | |
13026 | instruction on which a fast tracepoint may be placed. Returns -1 | |
13027 | if the packet is not supported, and 0 if the minimum instruction | |
13028 | length is unknown. */ | |
13029 | ||
13030 | static int | |
13031 | remote_get_min_fast_tracepoint_insn_len (struct target_ops *self) | |
13032 | { | |
13033 | struct remote_state *rs = get_remote_state (); | |
13034 | char *reply; | |
13035 | ||
13036 | /* If we're not debugging a process yet, the IPA can't be | |
13037 | loaded. */ | |
13038 | if (!target_has_execution) | |
13039 | return 0; | |
13040 | ||
13041 | /* Make sure the remote is pointing at the right process. */ | |
13042 | set_general_process (); | |
13043 | ||
13044 | xsnprintf (rs->buf, get_remote_packet_size (), "qTMinFTPILen"); | |
13045 | putpkt (rs->buf); | |
13046 | reply = remote_get_noisy_reply (); | |
13047 | if (*reply == '\0') | |
13048 | return -1; | |
13049 | else | |
13050 | { | |
13051 | ULONGEST min_insn_len; | |
13052 | ||
13053 | unpack_varlen_hex (reply, &min_insn_len); | |
13054 | ||
13055 | return (int) min_insn_len; | |
13056 | } | |
13057 | } | |
13058 | ||
13059 | static void | |
13060 | remote_set_trace_buffer_size (struct target_ops *self, LONGEST val) | |
13061 | { | |
13062 | if (packet_support (PACKET_QTBuffer_size) != PACKET_DISABLE) | |
13063 | { | |
13064 | struct remote_state *rs = get_remote_state (); | |
13065 | char *buf = rs->buf; | |
13066 | char *endbuf = rs->buf + get_remote_packet_size (); | |
13067 | enum packet_result result; | |
13068 | ||
13069 | gdb_assert (val >= 0 || val == -1); | |
13070 | buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:"); | |
13071 | /* Send -1 as literal "-1" to avoid host size dependency. */ | |
13072 | if (val < 0) | |
13073 | { | |
13074 | *buf++ = '-'; | |
13075 | buf += hexnumstr (buf, (ULONGEST) -val); | |
13076 | } | |
13077 | else | |
13078 | buf += hexnumstr (buf, (ULONGEST) val); | |
13079 | ||
13080 | putpkt (rs->buf); | |
13081 | remote_get_noisy_reply (); | |
13082 | result = packet_ok (rs->buf, | |
13083 | &remote_protocol_packets[PACKET_QTBuffer_size]); | |
13084 | ||
13085 | if (result != PACKET_OK) | |
13086 | warning (_("Bogus reply from target: %s"), rs->buf); | |
13087 | } | |
13088 | } | |
13089 | ||
13090 | static int | |
13091 | remote_set_trace_notes (struct target_ops *self, | |
13092 | const char *user, const char *notes, | |
13093 | const char *stop_notes) | |
13094 | { | |
13095 | struct remote_state *rs = get_remote_state (); | |
13096 | char *reply; | |
13097 | char *buf = rs->buf; | |
13098 | char *endbuf = rs->buf + get_remote_packet_size (); | |
13099 | int nbytes; | |
13100 | ||
13101 | buf += xsnprintf (buf, endbuf - buf, "QTNotes:"); | |
13102 | if (user) | |
13103 | { | |
13104 | buf += xsnprintf (buf, endbuf - buf, "user:"); | |
13105 | nbytes = bin2hex ((gdb_byte *) user, buf, strlen (user)); | |
13106 | buf += 2 * nbytes; | |
13107 | *buf++ = ';'; | |
13108 | } | |
13109 | if (notes) | |
13110 | { | |
13111 | buf += xsnprintf (buf, endbuf - buf, "notes:"); | |
13112 | nbytes = bin2hex ((gdb_byte *) notes, buf, strlen (notes)); | |
13113 | buf += 2 * nbytes; | |
13114 | *buf++ = ';'; | |
13115 | } | |
13116 | if (stop_notes) | |
13117 | { | |
13118 | buf += xsnprintf (buf, endbuf - buf, "tstop:"); | |
13119 | nbytes = bin2hex ((gdb_byte *) stop_notes, buf, strlen (stop_notes)); | |
13120 | buf += 2 * nbytes; | |
13121 | *buf++ = ';'; | |
13122 | } | |
13123 | /* Ensure the buffer is terminated. */ | |
13124 | *buf = '\0'; | |
13125 | ||
13126 | putpkt (rs->buf); | |
13127 | reply = remote_get_noisy_reply (); | |
13128 | if (*reply == '\0') | |
13129 | return 0; | |
13130 | ||
13131 | if (strcmp (reply, "OK") != 0) | |
13132 | error (_("Bogus reply from target: %s"), reply); | |
13133 | ||
13134 | return 1; | |
13135 | } | |
13136 | ||
13137 | static int | |
13138 | remote_use_agent (struct target_ops *self, int use) | |
13139 | { | |
13140 | if (packet_support (PACKET_QAgent) != PACKET_DISABLE) | |
13141 | { | |
13142 | struct remote_state *rs = get_remote_state (); | |
13143 | ||
13144 | /* If the stub supports QAgent. */ | |
13145 | xsnprintf (rs->buf, get_remote_packet_size (), "QAgent:%d", use); | |
13146 | putpkt (rs->buf); | |
13147 | getpkt (&rs->buf, &rs->buf_size, 0); | |
13148 | ||
13149 | if (strcmp (rs->buf, "OK") == 0) | |
13150 | { | |
13151 | use_agent = use; | |
13152 | return 1; | |
13153 | } | |
13154 | } | |
13155 | ||
13156 | return 0; | |
13157 | } | |
13158 | ||
13159 | static int | |
13160 | remote_can_use_agent (struct target_ops *self) | |
13161 | { | |
13162 | return (packet_support (PACKET_QAgent) != PACKET_DISABLE); | |
13163 | } | |
13164 | ||
13165 | struct btrace_target_info | |
13166 | { | |
13167 | /* The ptid of the traced thread. */ | |
13168 | ptid_t ptid; | |
13169 | ||
13170 | /* The obtained branch trace configuration. */ | |
13171 | struct btrace_config conf; | |
13172 | }; | |
13173 | ||
13174 | /* Reset our idea of our target's btrace configuration. */ | |
13175 | ||
13176 | static void | |
13177 | remote_btrace_reset (void) | |
13178 | { | |
13179 | struct remote_state *rs = get_remote_state (); | |
13180 | ||
13181 | memset (&rs->btrace_config, 0, sizeof (rs->btrace_config)); | |
13182 | } | |
13183 | ||
13184 | /* Check whether the target supports branch tracing. */ | |
13185 | ||
13186 | static int | |
13187 | remote_supports_btrace (struct target_ops *self, enum btrace_format format) | |
13188 | { | |
13189 | if (packet_support (PACKET_Qbtrace_off) != PACKET_ENABLE) | |
13190 | return 0; | |
13191 | if (packet_support (PACKET_qXfer_btrace) != PACKET_ENABLE) | |
13192 | return 0; | |
13193 | ||
13194 | switch (format) | |
13195 | { | |
13196 | case BTRACE_FORMAT_NONE: | |
13197 | return 0; | |
13198 | ||
13199 | case BTRACE_FORMAT_BTS: | |
13200 | return (packet_support (PACKET_Qbtrace_bts) == PACKET_ENABLE); | |
13201 | ||
13202 | case BTRACE_FORMAT_PT: | |
13203 | /* The trace is decoded on the host. Even if our target supports it, | |
13204 | we still need to have libipt to decode the trace. */ | |
13205 | #if defined (HAVE_LIBIPT) | |
13206 | return (packet_support (PACKET_Qbtrace_pt) == PACKET_ENABLE); | |
13207 | #else /* !defined (HAVE_LIBIPT) */ | |
13208 | return 0; | |
13209 | #endif /* !defined (HAVE_LIBIPT) */ | |
13210 | } | |
13211 | ||
13212 | internal_error (__FILE__, __LINE__, _("Unknown branch trace format")); | |
13213 | } | |
13214 | ||
13215 | /* Synchronize the configuration with the target. */ | |
13216 | ||
13217 | static void | |
13218 | btrace_sync_conf (const struct btrace_config *conf) | |
13219 | { | |
13220 | struct packet_config *packet; | |
13221 | struct remote_state *rs; | |
13222 | char *buf, *pos, *endbuf; | |
13223 | ||
13224 | rs = get_remote_state (); | |
13225 | buf = rs->buf; | |
13226 | endbuf = buf + get_remote_packet_size (); | |
13227 | ||
13228 | packet = &remote_protocol_packets[PACKET_Qbtrace_conf_bts_size]; | |
13229 | if (packet_config_support (packet) == PACKET_ENABLE | |
13230 | && conf->bts.size != rs->btrace_config.bts.size) | |
13231 | { | |
13232 | pos = buf; | |
13233 | pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name, | |
13234 | conf->bts.size); | |
13235 | ||
13236 | putpkt (buf); | |
13237 | getpkt (&buf, &rs->buf_size, 0); | |
13238 | ||
13239 | if (packet_ok (buf, packet) == PACKET_ERROR) | |
13240 | { | |
13241 | if (buf[0] == 'E' && buf[1] == '.') | |
13242 | error (_("Failed to configure the BTS buffer size: %s"), buf + 2); | |
13243 | else | |
13244 | error (_("Failed to configure the BTS buffer size.")); | |
13245 | } | |
13246 | ||
13247 | rs->btrace_config.bts.size = conf->bts.size; | |
13248 | } | |
13249 | ||
13250 | packet = &remote_protocol_packets[PACKET_Qbtrace_conf_pt_size]; | |
13251 | if (packet_config_support (packet) == PACKET_ENABLE | |
13252 | && conf->pt.size != rs->btrace_config.pt.size) | |
13253 | { | |
13254 | pos = buf; | |
13255 | pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name, | |
13256 | conf->pt.size); | |
13257 | ||
13258 | putpkt (buf); | |
13259 | getpkt (&buf, &rs->buf_size, 0); | |
13260 | ||
13261 | if (packet_ok (buf, packet) == PACKET_ERROR) | |
13262 | { | |
13263 | if (buf[0] == 'E' && buf[1] == '.') | |
13264 | error (_("Failed to configure the trace buffer size: %s"), buf + 2); | |
13265 | else | |
13266 | error (_("Failed to configure the trace buffer size.")); | |
13267 | } | |
13268 | ||
13269 | rs->btrace_config.pt.size = conf->pt.size; | |
13270 | } | |
13271 | } | |
13272 | ||
13273 | /* Read the current thread's btrace configuration from the target and | |
13274 | store it into CONF. */ | |
13275 | ||
13276 | static void | |
13277 | btrace_read_config (struct btrace_config *conf) | |
13278 | { | |
13279 | gdb::unique_xmalloc_ptr<char> xml | |
13280 | = target_read_stralloc (¤t_target, TARGET_OBJECT_BTRACE_CONF, ""); | |
13281 | if (xml != NULL) | |
13282 | parse_xml_btrace_conf (conf, xml.get ()); | |
13283 | } | |
13284 | ||
13285 | /* Maybe reopen target btrace. */ | |
13286 | ||
13287 | static void | |
13288 | remote_btrace_maybe_reopen (void) | |
13289 | { | |
13290 | struct remote_state *rs = get_remote_state (); | |
13291 | struct thread_info *tp; | |
13292 | int btrace_target_pushed = 0; | |
13293 | int warned = 0; | |
13294 | ||
13295 | scoped_restore_current_thread restore_thread; | |
13296 | ||
13297 | ALL_NON_EXITED_THREADS (tp) | |
13298 | { | |
13299 | set_general_thread (tp->ptid); | |
13300 | ||
13301 | memset (&rs->btrace_config, 0x00, sizeof (struct btrace_config)); | |
13302 | btrace_read_config (&rs->btrace_config); | |
13303 | ||
13304 | if (rs->btrace_config.format == BTRACE_FORMAT_NONE) | |
13305 | continue; | |
13306 | ||
13307 | #if !defined (HAVE_LIBIPT) | |
13308 | if (rs->btrace_config.format == BTRACE_FORMAT_PT) | |
13309 | { | |
13310 | if (!warned) | |
13311 | { | |
13312 | warned = 1; | |
13313 | warning (_("GDB does not support Intel Processor Trace. " | |
13314 | "\"record\" will not work in this session.")); | |
13315 | } | |
13316 | ||
13317 | continue; | |
13318 | } | |
13319 | #endif /* !defined (HAVE_LIBIPT) */ | |
13320 | ||
13321 | /* Push target, once, but before anything else happens. This way our | |
13322 | changes to the threads will be cleaned up by unpushing the target | |
13323 | in case btrace_read_config () throws. */ | |
13324 | if (!btrace_target_pushed) | |
13325 | { | |
13326 | btrace_target_pushed = 1; | |
13327 | record_btrace_push_target (); | |
13328 | printf_filtered (_("Target is recording using %s.\n"), | |
13329 | btrace_format_string (rs->btrace_config.format)); | |
13330 | } | |
13331 | ||
13332 | tp->btrace.target = XCNEW (struct btrace_target_info); | |
13333 | tp->btrace.target->ptid = tp->ptid; | |
13334 | tp->btrace.target->conf = rs->btrace_config; | |
13335 | } | |
13336 | } | |
13337 | ||
13338 | /* Enable branch tracing. */ | |
13339 | ||
13340 | static struct btrace_target_info * | |
13341 | remote_enable_btrace (struct target_ops *self, ptid_t ptid, | |
13342 | const struct btrace_config *conf) | |
13343 | { | |
13344 | struct btrace_target_info *tinfo = NULL; | |
13345 | struct packet_config *packet = NULL; | |
13346 | struct remote_state *rs = get_remote_state (); | |
13347 | char *buf = rs->buf; | |
13348 | char *endbuf = rs->buf + get_remote_packet_size (); | |
13349 | ||
13350 | switch (conf->format) | |
13351 | { | |
13352 | case BTRACE_FORMAT_BTS: | |
13353 | packet = &remote_protocol_packets[PACKET_Qbtrace_bts]; | |
13354 | break; | |
13355 | ||
13356 | case BTRACE_FORMAT_PT: | |
13357 | packet = &remote_protocol_packets[PACKET_Qbtrace_pt]; | |
13358 | break; | |
13359 | } | |
13360 | ||
13361 | if (packet == NULL || packet_config_support (packet) != PACKET_ENABLE) | |
13362 | error (_("Target does not support branch tracing.")); | |
13363 | ||
13364 | btrace_sync_conf (conf); | |
13365 | ||
13366 | set_general_thread (ptid); | |
13367 | ||
13368 | buf += xsnprintf (buf, endbuf - buf, "%s", packet->name); | |
13369 | putpkt (rs->buf); | |
13370 | getpkt (&rs->buf, &rs->buf_size, 0); | |
13371 | ||
13372 | if (packet_ok (rs->buf, packet) == PACKET_ERROR) | |
13373 | { | |
13374 | if (rs->buf[0] == 'E' && rs->buf[1] == '.') | |
13375 | error (_("Could not enable branch tracing for %s: %s"), | |
13376 | target_pid_to_str (ptid), rs->buf + 2); | |
13377 | else | |
13378 | error (_("Could not enable branch tracing for %s."), | |
13379 | target_pid_to_str (ptid)); | |
13380 | } | |
13381 | ||
13382 | tinfo = XCNEW (struct btrace_target_info); | |
13383 | tinfo->ptid = ptid; | |
13384 | ||
13385 | /* If we fail to read the configuration, we lose some information, but the | |
13386 | tracing itself is not impacted. */ | |
13387 | TRY | |
13388 | { | |
13389 | btrace_read_config (&tinfo->conf); | |
13390 | } | |
13391 | CATCH (err, RETURN_MASK_ERROR) | |
13392 | { | |
13393 | if (err.message != NULL) | |
13394 | warning ("%s", err.message); | |
13395 | } | |
13396 | END_CATCH | |
13397 | ||
13398 | return tinfo; | |
13399 | } | |
13400 | ||
13401 | /* Disable branch tracing. */ | |
13402 | ||
13403 | static void | |
13404 | remote_disable_btrace (struct target_ops *self, | |
13405 | struct btrace_target_info *tinfo) | |
13406 | { | |
13407 | struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_off]; | |
13408 | struct remote_state *rs = get_remote_state (); | |
13409 | char *buf = rs->buf; | |
13410 | char *endbuf = rs->buf + get_remote_packet_size (); | |
13411 | ||
13412 | if (packet_config_support (packet) != PACKET_ENABLE) | |
13413 | error (_("Target does not support branch tracing.")); | |
13414 | ||
13415 | set_general_thread (tinfo->ptid); | |
13416 | ||
13417 | buf += xsnprintf (buf, endbuf - buf, "%s", packet->name); | |
13418 | putpkt (rs->buf); | |
13419 | getpkt (&rs->buf, &rs->buf_size, 0); | |
13420 | ||
13421 | if (packet_ok (rs->buf, packet) == PACKET_ERROR) | |
13422 | { | |
13423 | if (rs->buf[0] == 'E' && rs->buf[1] == '.') | |
13424 | error (_("Could not disable branch tracing for %s: %s"), | |
13425 | target_pid_to_str (tinfo->ptid), rs->buf + 2); | |
13426 | else | |
13427 | error (_("Could not disable branch tracing for %s."), | |
13428 | target_pid_to_str (tinfo->ptid)); | |
13429 | } | |
13430 | ||
13431 | xfree (tinfo); | |
13432 | } | |
13433 | ||
13434 | /* Teardown branch tracing. */ | |
13435 | ||
13436 | static void | |
13437 | remote_teardown_btrace (struct target_ops *self, | |
13438 | struct btrace_target_info *tinfo) | |
13439 | { | |
13440 | /* We must not talk to the target during teardown. */ | |
13441 | xfree (tinfo); | |
13442 | } | |
13443 | ||
13444 | /* Read the branch trace. */ | |
13445 | ||
13446 | static enum btrace_error | |
13447 | remote_read_btrace (struct target_ops *self, | |
13448 | struct btrace_data *btrace, | |
13449 | struct btrace_target_info *tinfo, | |
13450 | enum btrace_read_type type) | |
13451 | { | |
13452 | struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace]; | |
13453 | const char *annex; | |
13454 | ||
13455 | if (packet_config_support (packet) != PACKET_ENABLE) | |
13456 | error (_("Target does not support branch tracing.")); | |
13457 | ||
13458 | #if !defined(HAVE_LIBEXPAT) | |
13459 | error (_("Cannot process branch tracing result. XML parsing not supported.")); | |
13460 | #endif | |
13461 | ||
13462 | switch (type) | |
13463 | { | |
13464 | case BTRACE_READ_ALL: | |
13465 | annex = "all"; | |
13466 | break; | |
13467 | case BTRACE_READ_NEW: | |
13468 | annex = "new"; | |
13469 | break; | |
13470 | case BTRACE_READ_DELTA: | |
13471 | annex = "delta"; | |
13472 | break; | |
13473 | default: | |
13474 | internal_error (__FILE__, __LINE__, | |
13475 | _("Bad branch tracing read type: %u."), | |
13476 | (unsigned int) type); | |
13477 | } | |
13478 | ||
13479 | gdb::unique_xmalloc_ptr<char> xml | |
13480 | = target_read_stralloc (¤t_target, TARGET_OBJECT_BTRACE, annex); | |
13481 | if (xml == NULL) | |
13482 | return BTRACE_ERR_UNKNOWN; | |
13483 | ||
13484 | parse_xml_btrace (btrace, xml.get ()); | |
13485 | ||
13486 | return BTRACE_ERR_NONE; | |
13487 | } | |
13488 | ||
13489 | static const struct btrace_config * | |
13490 | remote_btrace_conf (struct target_ops *self, | |
13491 | const struct btrace_target_info *tinfo) | |
13492 | { | |
13493 | return &tinfo->conf; | |
13494 | } | |
13495 | ||
13496 | static int | |
13497 | remote_augmented_libraries_svr4_read (struct target_ops *self) | |
13498 | { | |
13499 | return (packet_support (PACKET_augmented_libraries_svr4_read_feature) | |
13500 | == PACKET_ENABLE); | |
13501 | } | |
13502 | ||
13503 | /* Implementation of to_load. */ | |
13504 | ||
13505 | static void | |
13506 | remote_load (struct target_ops *self, const char *name, int from_tty) | |
13507 | { | |
13508 | generic_load (name, from_tty); | |
13509 | } | |
13510 | ||
13511 | /* Accepts an integer PID; returns a string representing a file that | |
13512 | can be opened on the remote side to get the symbols for the child | |
13513 | process. Returns NULL if the operation is not supported. */ | |
13514 | ||
13515 | static char * | |
13516 | remote_pid_to_exec_file (struct target_ops *self, int pid) | |
13517 | { | |
13518 | static gdb::unique_xmalloc_ptr<char> filename; | |
13519 | struct inferior *inf; | |
13520 | char *annex = NULL; | |
13521 | ||
13522 | if (packet_support (PACKET_qXfer_exec_file) != PACKET_ENABLE) | |
13523 | return NULL; | |
13524 | ||
13525 | inf = find_inferior_pid (pid); | |
13526 | if (inf == NULL) | |
13527 | internal_error (__FILE__, __LINE__, | |
13528 | _("not currently attached to process %d"), pid); | |
13529 | ||
13530 | if (!inf->fake_pid_p) | |
13531 | { | |
13532 | const int annex_size = 9; | |
13533 | ||
13534 | annex = (char *) alloca (annex_size); | |
13535 | xsnprintf (annex, annex_size, "%x", pid); | |
13536 | } | |
13537 | ||
13538 | filename = target_read_stralloc (¤t_target, | |
13539 | TARGET_OBJECT_EXEC_FILE, annex); | |
13540 | ||
13541 | return filename.get (); | |
13542 | } | |
13543 | ||
13544 | /* Implement the to_can_do_single_step target_ops method. */ | |
13545 | ||
13546 | static int | |
13547 | remote_can_do_single_step (struct target_ops *ops) | |
13548 | { | |
13549 | /* We can only tell whether target supports single step or not by | |
13550 | supported s and S vCont actions if the stub supports vContSupported | |
13551 | feature. If the stub doesn't support vContSupported feature, | |
13552 | we have conservatively to think target doesn't supports single | |
13553 | step. */ | |
13554 | if (packet_support (PACKET_vContSupported) == PACKET_ENABLE) | |
13555 | { | |
13556 | struct remote_state *rs = get_remote_state (); | |
13557 | ||
13558 | if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN) | |
13559 | remote_vcont_probe (rs); | |
13560 | ||
13561 | return rs->supports_vCont.s && rs->supports_vCont.S; | |
13562 | } | |
13563 | else | |
13564 | return 0; | |
13565 | } | |
13566 | ||
13567 | /* Implementation of the to_execution_direction method for the remote | |
13568 | target. */ | |
13569 | ||
13570 | static enum exec_direction_kind | |
13571 | remote_execution_direction (struct target_ops *self) | |
13572 | { | |
13573 | struct remote_state *rs = get_remote_state (); | |
13574 | ||
13575 | return rs->last_resume_exec_dir; | |
13576 | } | |
13577 | ||
13578 | /* Return pointer to the thread_info struct which corresponds to | |
13579 | THREAD_HANDLE (having length HANDLE_LEN). */ | |
13580 | ||
13581 | static struct thread_info * | |
13582 | remote_thread_handle_to_thread_info (struct target_ops *ops, | |
13583 | const gdb_byte *thread_handle, | |
13584 | int handle_len, | |
13585 | struct inferior *inf) | |
13586 | { | |
13587 | struct thread_info *tp; | |
13588 | ||
13589 | ALL_NON_EXITED_THREADS (tp) | |
13590 | { | |
13591 | struct private_thread_info *priv = get_private_info_thread (tp); | |
13592 | ||
13593 | if (tp->inf == inf && priv != NULL) | |
13594 | { | |
13595 | if (handle_len != priv->thread_handle->size ()) | |
13596 | error (_("Thread handle size mismatch: %d vs %zu (from remote)"), | |
13597 | handle_len, priv->thread_handle->size ()); | |
13598 | if (memcmp (thread_handle, priv->thread_handle->data (), | |
13599 | handle_len) == 0) | |
13600 | return tp; | |
13601 | } | |
13602 | } | |
13603 | ||
13604 | return NULL; | |
13605 | } | |
13606 | ||
13607 | static void | |
13608 | init_remote_ops (void) | |
13609 | { | |
13610 | remote_ops.to_shortname = "remote"; | |
13611 | remote_ops.to_longname = "Remote serial target in gdb-specific protocol"; | |
13612 | remote_ops.to_doc = | |
13613 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ | |
13614 | Specify the serial device it is connected to\n\ | |
13615 | (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."; | |
13616 | remote_ops.to_open = remote_open; | |
13617 | remote_ops.to_close = remote_close; | |
13618 | remote_ops.to_detach = remote_detach; | |
13619 | remote_ops.to_disconnect = remote_disconnect; | |
13620 | remote_ops.to_resume = remote_resume; | |
13621 | remote_ops.to_commit_resume = remote_commit_resume; | |
13622 | remote_ops.to_wait = remote_wait; | |
13623 | remote_ops.to_fetch_registers = remote_fetch_registers; | |
13624 | remote_ops.to_store_registers = remote_store_registers; | |
13625 | remote_ops.to_prepare_to_store = remote_prepare_to_store; | |
13626 | remote_ops.to_files_info = remote_files_info; | |
13627 | remote_ops.to_insert_breakpoint = remote_insert_breakpoint; | |
13628 | remote_ops.to_remove_breakpoint = remote_remove_breakpoint; | |
13629 | remote_ops.to_stopped_by_sw_breakpoint = remote_stopped_by_sw_breakpoint; | |
13630 | remote_ops.to_supports_stopped_by_sw_breakpoint = remote_supports_stopped_by_sw_breakpoint; | |
13631 | remote_ops.to_stopped_by_hw_breakpoint = remote_stopped_by_hw_breakpoint; | |
13632 | remote_ops.to_supports_stopped_by_hw_breakpoint = remote_supports_stopped_by_hw_breakpoint; | |
13633 | remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint; | |
13634 | remote_ops.to_stopped_data_address = remote_stopped_data_address; | |
13635 | remote_ops.to_watchpoint_addr_within_range = | |
13636 | remote_watchpoint_addr_within_range; | |
13637 | remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources; | |
13638 | remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint; | |
13639 | remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint; | |
13640 | remote_ops.to_region_ok_for_hw_watchpoint | |
13641 | = remote_region_ok_for_hw_watchpoint; | |
13642 | remote_ops.to_insert_watchpoint = remote_insert_watchpoint; | |
13643 | remote_ops.to_remove_watchpoint = remote_remove_watchpoint; | |
13644 | remote_ops.to_kill = remote_kill; | |
13645 | remote_ops.to_load = remote_load; | |
13646 | remote_ops.to_mourn_inferior = remote_mourn; | |
13647 | remote_ops.to_pass_signals = remote_pass_signals; | |
13648 | remote_ops.to_set_syscall_catchpoint = remote_set_syscall_catchpoint; | |
13649 | remote_ops.to_program_signals = remote_program_signals; | |
13650 | remote_ops.to_thread_alive = remote_thread_alive; | |
13651 | remote_ops.to_thread_name = remote_thread_name; | |
13652 | remote_ops.to_update_thread_list = remote_update_thread_list; | |
13653 | remote_ops.to_pid_to_str = remote_pid_to_str; | |
13654 | remote_ops.to_extra_thread_info = remote_threads_extra_info; | |
13655 | remote_ops.to_get_ada_task_ptid = remote_get_ada_task_ptid; | |
13656 | remote_ops.to_stop = remote_stop; | |
13657 | remote_ops.to_interrupt = remote_interrupt; | |
13658 | remote_ops.to_pass_ctrlc = remote_pass_ctrlc; | |
13659 | remote_ops.to_xfer_partial = remote_xfer_partial; | |
13660 | remote_ops.to_get_memory_xfer_limit = remote_get_memory_xfer_limit; | |
13661 | remote_ops.to_rcmd = remote_rcmd; | |
13662 | remote_ops.to_pid_to_exec_file = remote_pid_to_exec_file; | |
13663 | remote_ops.to_log_command = serial_log_command; | |
13664 | remote_ops.to_get_thread_local_address = remote_get_thread_local_address; | |
13665 | remote_ops.to_stratum = process_stratum; | |
13666 | remote_ops.to_has_all_memory = default_child_has_all_memory; | |
13667 | remote_ops.to_has_memory = default_child_has_memory; | |
13668 | remote_ops.to_has_stack = default_child_has_stack; | |
13669 | remote_ops.to_has_registers = default_child_has_registers; | |
13670 | remote_ops.to_has_execution = default_child_has_execution; | |
13671 | remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ | |
13672 | remote_ops.to_can_execute_reverse = remote_can_execute_reverse; | |
13673 | remote_ops.to_magic = OPS_MAGIC; | |
13674 | remote_ops.to_memory_map = remote_memory_map; | |
13675 | remote_ops.to_flash_erase = remote_flash_erase; | |
13676 | remote_ops.to_flash_done = remote_flash_done; | |
13677 | remote_ops.to_read_description = remote_read_description; | |
13678 | remote_ops.to_search_memory = remote_search_memory; | |
13679 | remote_ops.to_can_async_p = remote_can_async_p; | |
13680 | remote_ops.to_is_async_p = remote_is_async_p; | |
13681 | remote_ops.to_async = remote_async; | |
13682 | remote_ops.to_thread_events = remote_thread_events; | |
13683 | remote_ops.to_can_do_single_step = remote_can_do_single_step; | |
13684 | remote_ops.to_terminal_inferior = remote_terminal_inferior; | |
13685 | remote_ops.to_terminal_ours = remote_terminal_ours; | |
13686 | remote_ops.to_supports_non_stop = remote_supports_non_stop; | |
13687 | remote_ops.to_supports_multi_process = remote_supports_multi_process; | |
13688 | remote_ops.to_supports_disable_randomization | |
13689 | = remote_supports_disable_randomization; | |
13690 | remote_ops.to_filesystem_is_local = remote_filesystem_is_local; | |
13691 | remote_ops.to_fileio_open = remote_hostio_open; | |
13692 | remote_ops.to_fileio_pwrite = remote_hostio_pwrite; | |
13693 | remote_ops.to_fileio_pread = remote_hostio_pread; | |
13694 | remote_ops.to_fileio_fstat = remote_hostio_fstat; | |
13695 | remote_ops.to_fileio_close = remote_hostio_close; | |
13696 | remote_ops.to_fileio_unlink = remote_hostio_unlink; | |
13697 | remote_ops.to_fileio_readlink = remote_hostio_readlink; | |
13698 | remote_ops.to_supports_enable_disable_tracepoint = remote_supports_enable_disable_tracepoint; | |
13699 | remote_ops.to_supports_string_tracing = remote_supports_string_tracing; | |
13700 | remote_ops.to_supports_evaluation_of_breakpoint_conditions = remote_supports_cond_breakpoints; | |
13701 | remote_ops.to_can_run_breakpoint_commands = remote_can_run_breakpoint_commands; | |
13702 | remote_ops.to_trace_init = remote_trace_init; | |
13703 | remote_ops.to_download_tracepoint = remote_download_tracepoint; | |
13704 | remote_ops.to_can_download_tracepoint = remote_can_download_tracepoint; | |
13705 | remote_ops.to_download_trace_state_variable | |
13706 | = remote_download_trace_state_variable; | |
13707 | remote_ops.to_enable_tracepoint = remote_enable_tracepoint; | |
13708 | remote_ops.to_disable_tracepoint = remote_disable_tracepoint; | |
13709 | remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions; | |
13710 | remote_ops.to_trace_start = remote_trace_start; | |
13711 | remote_ops.to_get_trace_status = remote_get_trace_status; | |
13712 | remote_ops.to_get_tracepoint_status = remote_get_tracepoint_status; | |
13713 | remote_ops.to_trace_stop = remote_trace_stop; | |
13714 | remote_ops.to_trace_find = remote_trace_find; | |
13715 | remote_ops.to_get_trace_state_variable_value | |
13716 | = remote_get_trace_state_variable_value; | |
13717 | remote_ops.to_save_trace_data = remote_save_trace_data; | |
13718 | remote_ops.to_upload_tracepoints = remote_upload_tracepoints; | |
13719 | remote_ops.to_upload_trace_state_variables | |
13720 | = remote_upload_trace_state_variables; | |
13721 | remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data; | |
13722 | remote_ops.to_get_min_fast_tracepoint_insn_len = remote_get_min_fast_tracepoint_insn_len; | |
13723 | remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing; | |
13724 | remote_ops.to_set_circular_trace_buffer = remote_set_circular_trace_buffer; | |
13725 | remote_ops.to_set_trace_buffer_size = remote_set_trace_buffer_size; | |
13726 | remote_ops.to_set_trace_notes = remote_set_trace_notes; | |
13727 | remote_ops.to_core_of_thread = remote_core_of_thread; | |
13728 | remote_ops.to_verify_memory = remote_verify_memory; | |
13729 | remote_ops.to_get_tib_address = remote_get_tib_address; | |
13730 | remote_ops.to_set_permissions = remote_set_permissions; | |
13731 | remote_ops.to_static_tracepoint_marker_at | |
13732 | = remote_static_tracepoint_marker_at; | |
13733 | remote_ops.to_static_tracepoint_markers_by_strid | |
13734 | = remote_static_tracepoint_markers_by_strid; | |
13735 | remote_ops.to_traceframe_info = remote_traceframe_info; | |
13736 | remote_ops.to_use_agent = remote_use_agent; | |
13737 | remote_ops.to_can_use_agent = remote_can_use_agent; | |
13738 | remote_ops.to_supports_btrace = remote_supports_btrace; | |
13739 | remote_ops.to_enable_btrace = remote_enable_btrace; | |
13740 | remote_ops.to_disable_btrace = remote_disable_btrace; | |
13741 | remote_ops.to_teardown_btrace = remote_teardown_btrace; | |
13742 | remote_ops.to_read_btrace = remote_read_btrace; | |
13743 | remote_ops.to_btrace_conf = remote_btrace_conf; | |
13744 | remote_ops.to_augmented_libraries_svr4_read = | |
13745 | remote_augmented_libraries_svr4_read; | |
13746 | remote_ops.to_follow_fork = remote_follow_fork; | |
13747 | remote_ops.to_follow_exec = remote_follow_exec; | |
13748 | remote_ops.to_insert_fork_catchpoint = remote_insert_fork_catchpoint; | |
13749 | remote_ops.to_remove_fork_catchpoint = remote_remove_fork_catchpoint; | |
13750 | remote_ops.to_insert_vfork_catchpoint = remote_insert_vfork_catchpoint; | |
13751 | remote_ops.to_remove_vfork_catchpoint = remote_remove_vfork_catchpoint; | |
13752 | remote_ops.to_insert_exec_catchpoint = remote_insert_exec_catchpoint; | |
13753 | remote_ops.to_remove_exec_catchpoint = remote_remove_exec_catchpoint; | |
13754 | remote_ops.to_execution_direction = remote_execution_direction; | |
13755 | remote_ops.to_thread_handle_to_thread_info = | |
13756 | remote_thread_handle_to_thread_info; | |
13757 | } | |
13758 | ||
13759 | /* Set up the extended remote vector by making a copy of the standard | |
13760 | remote vector and adding to it. */ | |
13761 | ||
13762 | static void | |
13763 | init_extended_remote_ops (void) | |
13764 | { | |
13765 | extended_remote_ops = remote_ops; | |
13766 | ||
13767 | extended_remote_ops.to_shortname = "extended-remote"; | |
13768 | extended_remote_ops.to_longname = | |
13769 | "Extended remote serial target in gdb-specific protocol"; | |
13770 | extended_remote_ops.to_doc = | |
13771 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ | |
13772 | Specify the serial device it is connected to (e.g. /dev/ttya)."; | |
13773 | extended_remote_ops.to_open = extended_remote_open; | |
13774 | extended_remote_ops.to_create_inferior = extended_remote_create_inferior; | |
13775 | extended_remote_ops.to_detach = extended_remote_detach; | |
13776 | extended_remote_ops.to_attach = extended_remote_attach; | |
13777 | extended_remote_ops.to_post_attach = extended_remote_post_attach; | |
13778 | extended_remote_ops.to_supports_disable_randomization | |
13779 | = extended_remote_supports_disable_randomization; | |
13780 | } | |
13781 | ||
13782 | static int | |
13783 | remote_can_async_p (struct target_ops *ops) | |
13784 | { | |
13785 | struct remote_state *rs = get_remote_state (); | |
13786 | ||
13787 | /* We don't go async if the user has explicitly prevented it with the | |
13788 | "maint set target-async" command. */ | |
13789 | if (!target_async_permitted) | |
13790 | return 0; | |
13791 | ||
13792 | /* We're async whenever the serial device is. */ | |
13793 | return serial_can_async_p (rs->remote_desc); | |
13794 | } | |
13795 | ||
13796 | static int | |
13797 | remote_is_async_p (struct target_ops *ops) | |
13798 | { | |
13799 | struct remote_state *rs = get_remote_state (); | |
13800 | ||
13801 | if (!target_async_permitted) | |
13802 | /* We only enable async when the user specifically asks for it. */ | |
13803 | return 0; | |
13804 | ||
13805 | /* We're async whenever the serial device is. */ | |
13806 | return serial_is_async_p (rs->remote_desc); | |
13807 | } | |
13808 | ||
13809 | /* Pass the SERIAL event on and up to the client. One day this code | |
13810 | will be able to delay notifying the client of an event until the | |
13811 | point where an entire packet has been received. */ | |
13812 | ||
13813 | static serial_event_ftype remote_async_serial_handler; | |
13814 | ||
13815 | static void | |
13816 | remote_async_serial_handler (struct serial *scb, void *context) | |
13817 | { | |
13818 | /* Don't propogate error information up to the client. Instead let | |
13819 | the client find out about the error by querying the target. */ | |
13820 | inferior_event_handler (INF_REG_EVENT, NULL); | |
13821 | } | |
13822 | ||
13823 | static void | |
13824 | remote_async_inferior_event_handler (gdb_client_data data) | |
13825 | { | |
13826 | inferior_event_handler (INF_REG_EVENT, NULL); | |
13827 | } | |
13828 | ||
13829 | static void | |
13830 | remote_async (struct target_ops *ops, int enable) | |
13831 | { | |
13832 | struct remote_state *rs = get_remote_state (); | |
13833 | ||
13834 | if (enable) | |
13835 | { | |
13836 | serial_async (rs->remote_desc, remote_async_serial_handler, rs); | |
13837 | ||
13838 | /* If there are pending events in the stop reply queue tell the | |
13839 | event loop to process them. */ | |
13840 | if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue)) | |
13841 | mark_async_event_handler (remote_async_inferior_event_token); | |
13842 | /* For simplicity, below we clear the pending events token | |
13843 | without remembering whether it is marked, so here we always | |
13844 | mark it. If there's actually no pending notification to | |
13845 | process, this ends up being a no-op (other than a spurious | |
13846 | event-loop wakeup). */ | |
13847 | if (target_is_non_stop_p ()) | |
13848 | mark_async_event_handler (rs->notif_state->get_pending_events_token); | |
13849 | } | |
13850 | else | |
13851 | { | |
13852 | serial_async (rs->remote_desc, NULL, NULL); | |
13853 | /* If the core is disabling async, it doesn't want to be | |
13854 | disturbed with target events. Clear all async event sources | |
13855 | too. */ | |
13856 | clear_async_event_handler (remote_async_inferior_event_token); | |
13857 | if (target_is_non_stop_p ()) | |
13858 | clear_async_event_handler (rs->notif_state->get_pending_events_token); | |
13859 | } | |
13860 | } | |
13861 | ||
13862 | /* Implementation of the to_thread_events method. */ | |
13863 | ||
13864 | static void | |
13865 | remote_thread_events (struct target_ops *ops, int enable) | |
13866 | { | |
13867 | struct remote_state *rs = get_remote_state (); | |
13868 | size_t size = get_remote_packet_size (); | |
13869 | ||
13870 | if (packet_support (PACKET_QThreadEvents) == PACKET_DISABLE) | |
13871 | return; | |
13872 | ||
13873 | xsnprintf (rs->buf, size, "QThreadEvents:%x", enable ? 1 : 0); | |
13874 | putpkt (rs->buf); | |
13875 | getpkt (&rs->buf, &rs->buf_size, 0); | |
13876 | ||
13877 | switch (packet_ok (rs->buf, | |
13878 | &remote_protocol_packets[PACKET_QThreadEvents])) | |
13879 | { | |
13880 | case PACKET_OK: | |
13881 | if (strcmp (rs->buf, "OK") != 0) | |
13882 | error (_("Remote refused setting thread events: %s"), rs->buf); | |
13883 | break; | |
13884 | case PACKET_ERROR: | |
13885 | warning (_("Remote failure reply: %s"), rs->buf); | |
13886 | break; | |
13887 | case PACKET_UNKNOWN: | |
13888 | break; | |
13889 | } | |
13890 | } | |
13891 | ||
13892 | static void | |
13893 | set_remote_cmd (const char *args, int from_tty) | |
13894 | { | |
13895 | help_list (remote_set_cmdlist, "set remote ", all_commands, gdb_stdout); | |
13896 | } | |
13897 | ||
13898 | static void | |
13899 | show_remote_cmd (const char *args, int from_tty) | |
13900 | { | |
13901 | /* We can't just use cmd_show_list here, because we want to skip | |
13902 | the redundant "show remote Z-packet" and the legacy aliases. */ | |
13903 | struct cmd_list_element *list = remote_show_cmdlist; | |
13904 | struct ui_out *uiout = current_uiout; | |
13905 | ||
13906 | ui_out_emit_tuple tuple_emitter (uiout, "showlist"); | |
13907 | for (; list != NULL; list = list->next) | |
13908 | if (strcmp (list->name, "Z-packet") == 0) | |
13909 | continue; | |
13910 | else if (list->type == not_set_cmd) | |
13911 | /* Alias commands are exactly like the original, except they | |
13912 | don't have the normal type. */ | |
13913 | continue; | |
13914 | else | |
13915 | { | |
13916 | ui_out_emit_tuple option_emitter (uiout, "option"); | |
13917 | ||
13918 | uiout->field_string ("name", list->name); | |
13919 | uiout->text (": "); | |
13920 | if (list->type == show_cmd) | |
13921 | do_show_command (NULL, from_tty, list); | |
13922 | else | |
13923 | cmd_func (list, NULL, from_tty); | |
13924 | } | |
13925 | } | |
13926 | ||
13927 | ||
13928 | /* Function to be called whenever a new objfile (shlib) is detected. */ | |
13929 | static void | |
13930 | remote_new_objfile (struct objfile *objfile) | |
13931 | { | |
13932 | struct remote_state *rs = get_remote_state (); | |
13933 | ||
13934 | if (rs->remote_desc != 0) /* Have a remote connection. */ | |
13935 | remote_check_symbols (); | |
13936 | } | |
13937 | ||
13938 | /* Pull all the tracepoints defined on the target and create local | |
13939 | data structures representing them. We don't want to create real | |
13940 | tracepoints yet, we don't want to mess up the user's existing | |
13941 | collection. */ | |
13942 | ||
13943 | static int | |
13944 | remote_upload_tracepoints (struct target_ops *self, struct uploaded_tp **utpp) | |
13945 | { | |
13946 | struct remote_state *rs = get_remote_state (); | |
13947 | char *p; | |
13948 | ||
13949 | /* Ask for a first packet of tracepoint definition. */ | |
13950 | putpkt ("qTfP"); | |
13951 | getpkt (&rs->buf, &rs->buf_size, 0); | |
13952 | p = rs->buf; | |
13953 | while (*p && *p != 'l') | |
13954 | { | |
13955 | parse_tracepoint_definition (p, utpp); | |
13956 | /* Ask for another packet of tracepoint definition. */ | |
13957 | putpkt ("qTsP"); | |
13958 | getpkt (&rs->buf, &rs->buf_size, 0); | |
13959 | p = rs->buf; | |
13960 | } | |
13961 | return 0; | |
13962 | } | |
13963 | ||
13964 | static int | |
13965 | remote_upload_trace_state_variables (struct target_ops *self, | |
13966 | struct uploaded_tsv **utsvp) | |
13967 | { | |
13968 | struct remote_state *rs = get_remote_state (); | |
13969 | char *p; | |
13970 | ||
13971 | /* Ask for a first packet of variable definition. */ | |
13972 | putpkt ("qTfV"); | |
13973 | getpkt (&rs->buf, &rs->buf_size, 0); | |
13974 | p = rs->buf; | |
13975 | while (*p && *p != 'l') | |
13976 | { | |
13977 | parse_tsv_definition (p, utsvp); | |
13978 | /* Ask for another packet of variable definition. */ | |
13979 | putpkt ("qTsV"); | |
13980 | getpkt (&rs->buf, &rs->buf_size, 0); | |
13981 | p = rs->buf; | |
13982 | } | |
13983 | return 0; | |
13984 | } | |
13985 | ||
13986 | /* The "set/show range-stepping" show hook. */ | |
13987 | ||
13988 | static void | |
13989 | show_range_stepping (struct ui_file *file, int from_tty, | |
13990 | struct cmd_list_element *c, | |
13991 | const char *value) | |
13992 | { | |
13993 | fprintf_filtered (file, | |
13994 | _("Debugger's willingness to use range stepping " | |
13995 | "is %s.\n"), value); | |
13996 | } | |
13997 | ||
13998 | /* The "set/show range-stepping" set hook. */ | |
13999 | ||
14000 | static void | |
14001 | set_range_stepping (char *ignore_args, int from_tty, | |
14002 | struct cmd_list_element *c) | |
14003 | { | |
14004 | struct remote_state *rs = get_remote_state (); | |
14005 | ||
14006 | /* Whene enabling, check whether range stepping is actually | |
14007 | supported by the target, and warn if not. */ | |
14008 | if (use_range_stepping) | |
14009 | { | |
14010 | if (rs->remote_desc != NULL) | |
14011 | { | |
14012 | if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN) | |
14013 | remote_vcont_probe (rs); | |
14014 | ||
14015 | if (packet_support (PACKET_vCont) == PACKET_ENABLE | |
14016 | && rs->supports_vCont.r) | |
14017 | return; | |
14018 | } | |
14019 | ||
14020 | warning (_("Range stepping is not supported by the current target")); | |
14021 | } | |
14022 | } | |
14023 | ||
14024 | void | |
14025 | _initialize_remote (void) | |
14026 | { | |
14027 | struct cmd_list_element *cmd; | |
14028 | const char *cmd_name; | |
14029 | ||
14030 | /* architecture specific data */ | |
14031 | remote_gdbarch_data_handle = | |
14032 | gdbarch_data_register_post_init (init_remote_state); | |
14033 | remote_g_packet_data_handle = | |
14034 | gdbarch_data_register_pre_init (remote_g_packet_data_init); | |
14035 | ||
14036 | remote_pspace_data | |
14037 | = register_program_space_data_with_cleanup (NULL, | |
14038 | remote_pspace_data_cleanup); | |
14039 | ||
14040 | /* Initialize the per-target state. At the moment there is only one | |
14041 | of these, not one per target. Only one target is active at a | |
14042 | time. */ | |
14043 | remote_state = new_remote_state (); | |
14044 | ||
14045 | init_remote_ops (); | |
14046 | add_target (&remote_ops); | |
14047 | ||
14048 | init_extended_remote_ops (); | |
14049 | add_target (&extended_remote_ops); | |
14050 | ||
14051 | /* Hook into new objfile notification. */ | |
14052 | observer_attach_new_objfile (remote_new_objfile); | |
14053 | /* We're no longer interested in notification events of an inferior | |
14054 | when it exits. */ | |
14055 | observer_attach_inferior_exit (discard_pending_stop_replies); | |
14056 | ||
14057 | #if 0 | |
14058 | init_remote_threadtests (); | |
14059 | #endif | |
14060 | ||
14061 | stop_reply_queue = QUEUE_alloc (stop_reply_p, stop_reply_xfree); | |
14062 | /* set/show remote ... */ | |
14063 | ||
14064 | add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\ | |
14065 | Remote protocol specific variables\n\ | |
14066 | Configure various remote-protocol specific variables such as\n\ | |
14067 | the packets being used"), | |
14068 | &remote_set_cmdlist, "set remote ", | |
14069 | 0 /* allow-unknown */, &setlist); | |
14070 | add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\ | |
14071 | Remote protocol specific variables\n\ | |
14072 | Configure various remote-protocol specific variables such as\n\ | |
14073 | the packets being used"), | |
14074 | &remote_show_cmdlist, "show remote ", | |
14075 | 0 /* allow-unknown */, &showlist); | |
14076 | ||
14077 | add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\ | |
14078 | Compare section data on target to the exec file.\n\ | |
14079 | Argument is a single section name (default: all loaded sections).\n\ | |
14080 | To compare only read-only loaded sections, specify the -r option."), | |
14081 | &cmdlist); | |
14082 | ||
14083 | add_cmd ("packet", class_maintenance, packet_command, _("\ | |
14084 | Send an arbitrary packet to a remote target.\n\ | |
14085 | maintenance packet TEXT\n\ | |
14086 | If GDB is talking to an inferior via the GDB serial protocol, then\n\ | |
14087 | this command sends the string TEXT to the inferior, and displays the\n\ | |
14088 | response packet. GDB supplies the initial `$' character, and the\n\ | |
14089 | terminating `#' character and checksum."), | |
14090 | &maintenancelist); | |
14091 | ||
14092 | add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\ | |
14093 | Set whether to send break if interrupted."), _("\ | |
14094 | Show whether to send break if interrupted."), _("\ | |
14095 | If set, a break, instead of a cntrl-c, is sent to the remote target."), | |
14096 | set_remotebreak, show_remotebreak, | |
14097 | &setlist, &showlist); | |
14098 | cmd_name = "remotebreak"; | |
14099 | cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1); | |
14100 | deprecate_cmd (cmd, "set remote interrupt-sequence"); | |
14101 | cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */ | |
14102 | cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1); | |
14103 | deprecate_cmd (cmd, "show remote interrupt-sequence"); | |
14104 | ||
14105 | add_setshow_enum_cmd ("interrupt-sequence", class_support, | |
14106 | interrupt_sequence_modes, &interrupt_sequence_mode, | |
14107 | _("\ | |
14108 | Set interrupt sequence to remote target."), _("\ | |
14109 | Show interrupt sequence to remote target."), _("\ | |
14110 | Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."), | |
14111 | NULL, show_interrupt_sequence, | |
14112 | &remote_set_cmdlist, | |
14113 | &remote_show_cmdlist); | |
14114 | ||
14115 | add_setshow_boolean_cmd ("interrupt-on-connect", class_support, | |
14116 | &interrupt_on_connect, _("\ | |
14117 | Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \ | |
14118 | Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \ | |
14119 | If set, interrupt sequence is sent to remote target."), | |
14120 | NULL, NULL, | |
14121 | &remote_set_cmdlist, &remote_show_cmdlist); | |
14122 | ||
14123 | /* Install commands for configuring memory read/write packets. */ | |
14124 | ||
14125 | add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\ | |
14126 | Set the maximum number of bytes per memory write packet (deprecated)."), | |
14127 | &setlist); | |
14128 | add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\ | |
14129 | Show the maximum number of bytes per memory write packet (deprecated)."), | |
14130 | &showlist); | |
14131 | add_cmd ("memory-write-packet-size", no_class, | |
14132 | set_memory_write_packet_size, _("\ | |
14133 | Set the maximum number of bytes per memory-write packet.\n\ | |
14134 | Specify the number of bytes in a packet or 0 (zero) for the\n\ | |
14135 | default packet size. The actual limit is further reduced\n\ | |
14136 | dependent on the target. Specify ``fixed'' to disable the\n\ | |
14137 | further restriction and ``limit'' to enable that restriction."), | |
14138 | &remote_set_cmdlist); | |
14139 | add_cmd ("memory-read-packet-size", no_class, | |
14140 | set_memory_read_packet_size, _("\ | |
14141 | Set the maximum number of bytes per memory-read packet.\n\ | |
14142 | Specify the number of bytes in a packet or 0 (zero) for the\n\ | |
14143 | default packet size. The actual limit is further reduced\n\ | |
14144 | dependent on the target. Specify ``fixed'' to disable the\n\ | |
14145 | further restriction and ``limit'' to enable that restriction."), | |
14146 | &remote_set_cmdlist); | |
14147 | add_cmd ("memory-write-packet-size", no_class, | |
14148 | show_memory_write_packet_size, | |
14149 | _("Show the maximum number of bytes per memory-write packet."), | |
14150 | &remote_show_cmdlist); | |
14151 | add_cmd ("memory-read-packet-size", no_class, | |
14152 | show_memory_read_packet_size, | |
14153 | _("Show the maximum number of bytes per memory-read packet."), | |
14154 | &remote_show_cmdlist); | |
14155 | ||
14156 | add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class, | |
14157 | &remote_hw_watchpoint_limit, _("\ | |
14158 | Set the maximum number of target hardware watchpoints."), _("\ | |
14159 | Show the maximum number of target hardware watchpoints."), _("\ | |
14160 | Specify a negative limit for unlimited."), | |
14161 | NULL, NULL, /* FIXME: i18n: The maximum | |
14162 | number of target hardware | |
14163 | watchpoints is %s. */ | |
14164 | &remote_set_cmdlist, &remote_show_cmdlist); | |
14165 | add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class, | |
14166 | &remote_hw_watchpoint_length_limit, _("\ | |
14167 | Set the maximum length (in bytes) of a target hardware watchpoint."), _("\ | |
14168 | Show the maximum length (in bytes) of a target hardware watchpoint."), _("\ | |
14169 | Specify a negative limit for unlimited."), | |
14170 | NULL, NULL, /* FIXME: i18n: The maximum | |
14171 | length (in bytes) of a target | |
14172 | hardware watchpoint is %s. */ | |
14173 | &remote_set_cmdlist, &remote_show_cmdlist); | |
14174 | add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class, | |
14175 | &remote_hw_breakpoint_limit, _("\ | |
14176 | Set the maximum number of target hardware breakpoints."), _("\ | |
14177 | Show the maximum number of target hardware breakpoints."), _("\ | |
14178 | Specify a negative limit for unlimited."), | |
14179 | NULL, NULL, /* FIXME: i18n: The maximum | |
14180 | number of target hardware | |
14181 | breakpoints is %s. */ | |
14182 | &remote_set_cmdlist, &remote_show_cmdlist); | |
14183 | ||
14184 | add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure, | |
14185 | &remote_address_size, _("\ | |
14186 | Set the maximum size of the address (in bits) in a memory packet."), _("\ | |
14187 | Show the maximum size of the address (in bits) in a memory packet."), NULL, | |
14188 | NULL, | |
14189 | NULL, /* FIXME: i18n: */ | |
14190 | &setlist, &showlist); | |
14191 | ||
14192 | init_all_packet_configs (); | |
14193 | ||
14194 | add_packet_config_cmd (&remote_protocol_packets[PACKET_X], | |
14195 | "X", "binary-download", 1); | |
14196 | ||
14197 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont], | |
14198 | "vCont", "verbose-resume", 0); | |
14199 | ||
14200 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals], | |
14201 | "QPassSignals", "pass-signals", 0); | |
14202 | ||
14203 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QCatchSyscalls], | |
14204 | "QCatchSyscalls", "catch-syscalls", 0); | |
14205 | ||
14206 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QProgramSignals], | |
14207 | "QProgramSignals", "program-signals", 0); | |
14208 | ||
14209 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QSetWorkingDir], | |
14210 | "QSetWorkingDir", "set-working-dir", 0); | |
14211 | ||
14212 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartupWithShell], | |
14213 | "QStartupWithShell", "startup-with-shell", 0); | |
14214 | ||
14215 | add_packet_config_cmd (&remote_protocol_packets | |
14216 | [PACKET_QEnvironmentHexEncoded], | |
14217 | "QEnvironmentHexEncoded", "environment-hex-encoded", | |
14218 | 0); | |
14219 | ||
14220 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QEnvironmentReset], | |
14221 | "QEnvironmentReset", "environment-reset", | |
14222 | 0); | |
14223 | ||
14224 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QEnvironmentUnset], | |
14225 | "QEnvironmentUnset", "environment-unset", | |
14226 | 0); | |
14227 | ||
14228 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol], | |
14229 | "qSymbol", "symbol-lookup", 0); | |
14230 | ||
14231 | add_packet_config_cmd (&remote_protocol_packets[PACKET_P], | |
14232 | "P", "set-register", 1); | |
14233 | ||
14234 | add_packet_config_cmd (&remote_protocol_packets[PACKET_p], | |
14235 | "p", "fetch-register", 1); | |
14236 | ||
14237 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0], | |
14238 | "Z0", "software-breakpoint", 0); | |
14239 | ||
14240 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1], | |
14241 | "Z1", "hardware-breakpoint", 0); | |
14242 | ||
14243 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2], | |
14244 | "Z2", "write-watchpoint", 0); | |
14245 | ||
14246 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3], | |
14247 | "Z3", "read-watchpoint", 0); | |
14248 | ||
14249 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4], | |
14250 | "Z4", "access-watchpoint", 0); | |
14251 | ||
14252 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv], | |
14253 | "qXfer:auxv:read", "read-aux-vector", 0); | |
14254 | ||
14255 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_exec_file], | |
14256 | "qXfer:exec-file:read", "pid-to-exec-file", 0); | |
14257 | ||
14258 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features], | |
14259 | "qXfer:features:read", "target-features", 0); | |
14260 | ||
14261 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries], | |
14262 | "qXfer:libraries:read", "library-info", 0); | |
14263 | ||
14264 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4], | |
14265 | "qXfer:libraries-svr4:read", "library-info-svr4", 0); | |
14266 | ||
14267 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map], | |
14268 | "qXfer:memory-map:read", "memory-map", 0); | |
14269 | ||
14270 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read], | |
14271 | "qXfer:spu:read", "read-spu-object", 0); | |
14272 | ||
14273 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write], | |
14274 | "qXfer:spu:write", "write-spu-object", 0); | |
14275 | ||
14276 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata], | |
14277 | "qXfer:osdata:read", "osdata", 0); | |
14278 | ||
14279 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads], | |
14280 | "qXfer:threads:read", "threads", 0); | |
14281 | ||
14282 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read], | |
14283 | "qXfer:siginfo:read", "read-siginfo-object", 0); | |
14284 | ||
14285 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write], | |
14286 | "qXfer:siginfo:write", "write-siginfo-object", 0); | |
14287 | ||
14288 | add_packet_config_cmd | |
14289 | (&remote_protocol_packets[PACKET_qXfer_traceframe_info], | |
14290 | "qXfer:traceframe-info:read", "traceframe-info", 0); | |
14291 | ||
14292 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_uib], | |
14293 | "qXfer:uib:read", "unwind-info-block", 0); | |
14294 | ||
14295 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr], | |
14296 | "qGetTLSAddr", "get-thread-local-storage-address", | |
14297 | 0); | |
14298 | ||
14299 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr], | |
14300 | "qGetTIBAddr", "get-thread-information-block-address", | |
14301 | 0); | |
14302 | ||
14303 | add_packet_config_cmd (&remote_protocol_packets[PACKET_bc], | |
14304 | "bc", "reverse-continue", 0); | |
14305 | ||
14306 | add_packet_config_cmd (&remote_protocol_packets[PACKET_bs], | |
14307 | "bs", "reverse-step", 0); | |
14308 | ||
14309 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported], | |
14310 | "qSupported", "supported-packets", 0); | |
14311 | ||
14312 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory], | |
14313 | "qSearch:memory", "search-memory", 0); | |
14314 | ||
14315 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qTStatus], | |
14316 | "qTStatus", "trace-status", 0); | |
14317 | ||
14318 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_setfs], | |
14319 | "vFile:setfs", "hostio-setfs", 0); | |
14320 | ||
14321 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open], | |
14322 | "vFile:open", "hostio-open", 0); | |
14323 | ||
14324 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread], | |
14325 | "vFile:pread", "hostio-pread", 0); | |
14326 | ||
14327 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite], | |
14328 | "vFile:pwrite", "hostio-pwrite", 0); | |
14329 | ||
14330 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close], | |
14331 | "vFile:close", "hostio-close", 0); | |
14332 | ||
14333 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink], | |
14334 | "vFile:unlink", "hostio-unlink", 0); | |
14335 | ||
14336 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink], | |
14337 | "vFile:readlink", "hostio-readlink", 0); | |
14338 | ||
14339 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_fstat], | |
14340 | "vFile:fstat", "hostio-fstat", 0); | |
14341 | ||
14342 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach], | |
14343 | "vAttach", "attach", 0); | |
14344 | ||
14345 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun], | |
14346 | "vRun", "run", 0); | |
14347 | ||
14348 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode], | |
14349 | "QStartNoAckMode", "noack", 0); | |
14350 | ||
14351 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill], | |
14352 | "vKill", "kill", 0); | |
14353 | ||
14354 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached], | |
14355 | "qAttached", "query-attached", 0); | |
14356 | ||
14357 | add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints], | |
14358 | "ConditionalTracepoints", | |
14359 | "conditional-tracepoints", 0); | |
14360 | ||
14361 | add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints], | |
14362 | "ConditionalBreakpoints", | |
14363 | "conditional-breakpoints", 0); | |
14364 | ||
14365 | add_packet_config_cmd (&remote_protocol_packets[PACKET_BreakpointCommands], | |
14366 | "BreakpointCommands", | |
14367 | "breakpoint-commands", 0); | |
14368 | ||
14369 | add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints], | |
14370 | "FastTracepoints", "fast-tracepoints", 0); | |
14371 | ||
14372 | add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource], | |
14373 | "TracepointSource", "TracepointSource", 0); | |
14374 | ||
14375 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow], | |
14376 | "QAllow", "allow", 0); | |
14377 | ||
14378 | add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints], | |
14379 | "StaticTracepoints", "static-tracepoints", 0); | |
14380 | ||
14381 | add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace], | |
14382 | "InstallInTrace", "install-in-trace", 0); | |
14383 | ||
14384 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read], | |
14385 | "qXfer:statictrace:read", "read-sdata-object", 0); | |
14386 | ||
14387 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic], | |
14388 | "qXfer:fdpic:read", "read-fdpic-loadmap", 0); | |
14389 | ||
14390 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization], | |
14391 | "QDisableRandomization", "disable-randomization", 0); | |
14392 | ||
14393 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QAgent], | |
14394 | "QAgent", "agent", 0); | |
14395 | ||
14396 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QTBuffer_size], | |
14397 | "QTBuffer:size", "trace-buffer-size", 0); | |
14398 | ||
14399 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_off], | |
14400 | "Qbtrace:off", "disable-btrace", 0); | |
14401 | ||
14402 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts], | |
14403 | "Qbtrace:bts", "enable-btrace-bts", 0); | |
14404 | ||
14405 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_pt], | |
14406 | "Qbtrace:pt", "enable-btrace-pt", 0); | |
14407 | ||
14408 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace], | |
14409 | "qXfer:btrace", "read-btrace", 0); | |
14410 | ||
14411 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace_conf], | |
14412 | "qXfer:btrace-conf", "read-btrace-conf", 0); | |
14413 | ||
14414 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_bts_size], | |
14415 | "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0); | |
14416 | ||
14417 | add_packet_config_cmd (&remote_protocol_packets[PACKET_multiprocess_feature], | |
14418 | "multiprocess-feature", "multiprocess-feature", 0); | |
14419 | ||
14420 | add_packet_config_cmd (&remote_protocol_packets[PACKET_swbreak_feature], | |
14421 | "swbreak-feature", "swbreak-feature", 0); | |
14422 | ||
14423 | add_packet_config_cmd (&remote_protocol_packets[PACKET_hwbreak_feature], | |
14424 | "hwbreak-feature", "hwbreak-feature", 0); | |
14425 | ||
14426 | add_packet_config_cmd (&remote_protocol_packets[PACKET_fork_event_feature], | |
14427 | "fork-event-feature", "fork-event-feature", 0); | |
14428 | ||
14429 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vfork_event_feature], | |
14430 | "vfork-event-feature", "vfork-event-feature", 0); | |
14431 | ||
14432 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_pt_size], | |
14433 | "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0); | |
14434 | ||
14435 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vContSupported], | |
14436 | "vContSupported", "verbose-resume-supported", 0); | |
14437 | ||
14438 | add_packet_config_cmd (&remote_protocol_packets[PACKET_exec_event_feature], | |
14439 | "exec-event-feature", "exec-event-feature", 0); | |
14440 | ||
14441 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vCtrlC], | |
14442 | "vCtrlC", "ctrl-c", 0); | |
14443 | ||
14444 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QThreadEvents], | |
14445 | "QThreadEvents", "thread-events", 0); | |
14446 | ||
14447 | add_packet_config_cmd (&remote_protocol_packets[PACKET_no_resumed], | |
14448 | "N stop reply", "no-resumed-stop-reply", 0); | |
14449 | ||
14450 | /* Assert that we've registered "set remote foo-packet" commands | |
14451 | for all packet configs. */ | |
14452 | { | |
14453 | int i; | |
14454 | ||
14455 | for (i = 0; i < PACKET_MAX; i++) | |
14456 | { | |
14457 | /* Ideally all configs would have a command associated. Some | |
14458 | still don't though. */ | |
14459 | int excepted; | |
14460 | ||
14461 | switch (i) | |
14462 | { | |
14463 | case PACKET_QNonStop: | |
14464 | case PACKET_EnableDisableTracepoints_feature: | |
14465 | case PACKET_tracenz_feature: | |
14466 | case PACKET_DisconnectedTracing_feature: | |
14467 | case PACKET_augmented_libraries_svr4_read_feature: | |
14468 | case PACKET_qCRC: | |
14469 | /* Additions to this list need to be well justified: | |
14470 | pre-existing packets are OK; new packets are not. */ | |
14471 | excepted = 1; | |
14472 | break; | |
14473 | default: | |
14474 | excepted = 0; | |
14475 | break; | |
14476 | } | |
14477 | ||
14478 | /* This catches both forgetting to add a config command, and | |
14479 | forgetting to remove a packet from the exception list. */ | |
14480 | gdb_assert (excepted == (remote_protocol_packets[i].name == NULL)); | |
14481 | } | |
14482 | } | |
14483 | ||
14484 | /* Keep the old ``set remote Z-packet ...'' working. Each individual | |
14485 | Z sub-packet has its own set and show commands, but users may | |
14486 | have sets to this variable in their .gdbinit files (or in their | |
14487 | documentation). */ | |
14488 | add_setshow_auto_boolean_cmd ("Z-packet", class_obscure, | |
14489 | &remote_Z_packet_detect, _("\ | |
14490 | Set use of remote protocol `Z' packets"), _("\ | |
14491 | Show use of remote protocol `Z' packets "), _("\ | |
14492 | When set, GDB will attempt to use the remote breakpoint and watchpoint\n\ | |
14493 | packets."), | |
14494 | set_remote_protocol_Z_packet_cmd, | |
14495 | show_remote_protocol_Z_packet_cmd, | |
14496 | /* FIXME: i18n: Use of remote protocol | |
14497 | `Z' packets is %s. */ | |
14498 | &remote_set_cmdlist, &remote_show_cmdlist); | |
14499 | ||
14500 | add_prefix_cmd ("remote", class_files, remote_command, _("\ | |
14501 | Manipulate files on the remote system\n\ | |
14502 | Transfer files to and from the remote target system."), | |
14503 | &remote_cmdlist, "remote ", | |
14504 | 0 /* allow-unknown */, &cmdlist); | |
14505 | ||
14506 | add_cmd ("put", class_files, remote_put_command, | |
14507 | _("Copy a local file to the remote system."), | |
14508 | &remote_cmdlist); | |
14509 | ||
14510 | add_cmd ("get", class_files, remote_get_command, | |
14511 | _("Copy a remote file to the local system."), | |
14512 | &remote_cmdlist); | |
14513 | ||
14514 | add_cmd ("delete", class_files, remote_delete_command, | |
14515 | _("Delete a remote file."), | |
14516 | &remote_cmdlist); | |
14517 | ||
14518 | add_setshow_string_noescape_cmd ("exec-file", class_files, | |
14519 | &remote_exec_file_var, _("\ | |
14520 | Set the remote pathname for \"run\""), _("\ | |
14521 | Show the remote pathname for \"run\""), NULL, | |
14522 | set_remote_exec_file, | |
14523 | show_remote_exec_file, | |
14524 | &remote_set_cmdlist, | |
14525 | &remote_show_cmdlist); | |
14526 | ||
14527 | add_setshow_boolean_cmd ("range-stepping", class_run, | |
14528 | &use_range_stepping, _("\ | |
14529 | Enable or disable range stepping."), _("\ | |
14530 | Show whether target-assisted range stepping is enabled."), _("\ | |
14531 | If on, and the target supports it, when stepping a source line, GDB\n\ | |
14532 | tells the target to step the corresponding range of addresses itself instead\n\ | |
14533 | of issuing multiple single-steps. This speeds up source level\n\ | |
14534 | stepping. If off, GDB always issues single-steps, even if range\n\ | |
14535 | stepping is supported by the target. The default is on."), | |
14536 | set_range_stepping, | |
14537 | show_range_stepping, | |
14538 | &setlist, | |
14539 | &showlist); | |
14540 | ||
14541 | /* Eventually initialize fileio. See fileio.c */ | |
14542 | initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist); | |
14543 | ||
14544 | /* Take advantage of the fact that the TID field is not used, to tag | |
14545 | special ptids with it set to != 0. */ | |
14546 | magic_null_ptid = ptid_build (42000, -1, 1); | |
14547 | not_sent_ptid = ptid_build (42000, -2, 1); | |
14548 | any_thread_ptid = ptid_build (42000, 0, 1); | |
14549 | } |