1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
20 /* See the GDB User Guide for details of the GDB remote protocol. */
30 /*#include "terminal.h" */
33 #include "gdb-stabs.h"
34 #include "gdbthread.h"
36 #include "remote-notif.h"
41 #include "cli/cli-decode.h"
42 #include "cli/cli-setshow.h"
43 #include "target-descriptions.h"
45 #include "filestuff.h"
50 #include "gdb_sys_time.h"
52 #include "event-loop.h"
53 #include "event-top.h"
59 #include "gdbcore.h" /* for exec_bfd */
61 #include "remote-fileio.h"
62 #include "gdb/fileio.h"
64 #include "xml-support.h"
66 #include "memory-map.h"
68 #include "tracepoint.h"
73 #include "record-btrace.h"
75 #include "common/scoped_restore.h"
77 #include "common/byte-vector.h"
79 /* Per-program-space data key. */
80 static const struct program_space_data
*remote_pspace_data
;
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
;
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.
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 };
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
);
105 static void remote_files_info (struct target_ops
*ignore
);
107 static void remote_prepare_to_store (struct target_ops
*self
,
108 struct regcache
*regcache
);
110 static void remote_open_1 (const char *, int, struct target_ops
*,
113 static void remote_close (struct target_ops
*self
);
117 static int remote_vkill (int pid
, struct remote_state
*rs
);
119 static void remote_kill_k (void);
121 static void remote_mourn (struct target_ops
*ops
);
123 static void extended_remote_restart (void);
125 static void remote_send (char **buf
, long *sizeof_buf_p
);
127 static int readchar (int timeout
);
129 static void remote_serial_write (const char *str
, int len
);
131 static void remote_kill (struct target_ops
*ops
);
133 static int remote_can_async_p (struct target_ops
*);
135 static int remote_is_async_p (struct target_ops
*);
137 static void remote_async (struct target_ops
*ops
, int enable
);
139 static void remote_thread_events (struct target_ops
*ops
, int enable
);
141 static void interrupt_query (void);
143 static void set_general_thread (ptid_t ptid
);
144 static void set_continue_thread (ptid_t ptid
);
146 static void get_offsets (void);
148 static void skip_frame (void);
150 static long read_frame (char **buf_p
, long *sizeof_buf
);
152 static int hexnumlen (ULONGEST num
);
154 static void init_remote_ops (void);
156 static void init_extended_remote_ops (void);
158 static void remote_stop (struct target_ops
*self
, ptid_t
);
160 static int stubhex (int ch
);
162 static int hexnumstr (char *, ULONGEST
);
164 static int hexnumnstr (char *, ULONGEST
, int);
166 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
168 static void print_packet (const char *);
170 static int stub_unpack_int (char *buff
, int fieldlength
);
172 static ptid_t
remote_current_thread (ptid_t oldptid
);
174 static int putpkt_binary (const char *buf
, int cnt
);
176 static void check_binary_download (CORE_ADDR addr
);
178 struct packet_config
;
180 static void show_packet_config_cmd (struct packet_config
*config
);
182 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
184 struct cmd_list_element
*c
,
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
);
190 static void remote_set_permissions (struct target_ops
*self
);
192 static int remote_get_trace_status (struct target_ops
*self
,
193 struct trace_status
*ts
);
195 static int remote_upload_tracepoints (struct target_ops
*self
,
196 struct uploaded_tp
**utpp
);
198 static int remote_upload_trace_state_variables (struct target_ops
*self
,
199 struct uploaded_tsv
**utsvp
);
201 static void remote_query_supported (void);
203 static void remote_check_symbols (void);
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
);
212 struct threads_listing_context
;
213 static void remove_new_fork_children (struct threads_listing_context
*);
215 static void remote_async_inferior_event_handler (gdb_client_data
);
217 static void remote_terminal_ours (struct target_ops
*self
);
219 static int remote_read_description_p (struct target_ops
*target
);
221 static void remote_console_output (char *msg
);
223 static int remote_supports_cond_breakpoints (struct target_ops
*self
);
225 static int remote_can_run_breakpoint_commands (struct target_ops
*self
);
227 static void remote_btrace_reset (void);
229 static void remote_btrace_maybe_reopen (void);
231 static int stop_reply_queue_length (void);
233 static void readahead_cache_invalidate (void);
235 static void remote_unpush_and_throw (void);
237 static struct remote_state
*get_remote_state (void);
241 static struct cmd_list_element
*remote_cmdlist
;
243 /* For "set remote" and "show remote". */
245 static struct cmd_list_element
*remote_set_cmdlist
;
246 static struct cmd_list_element
*remote_show_cmdlist
;
248 /* Stub vCont actions support.
250 Each field is a boolean flag indicating whether the stub reports
251 support for the corresponding action. */
253 struct vCont_action_support
268 /* Controls whether GDB is willing to use range stepping. */
270 static int use_range_stepping
= 1;
272 #define OPAQUETHREADBYTES 8
274 /* a 64 bit opaque identifier */
275 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
277 /* About this many threadisds fit in a packet. */
279 #define MAXTHREADLISTRESULTS 32
281 /* The max number of chars in debug output. The rest of chars are
284 #define REMOTE_DEBUG_MAX_CHAR 512
286 /* Data for the vFile:pread readahead cache. */
288 struct readahead_cache
290 /* The file descriptor for the file that is being cached. -1 if the
294 /* The offset into the file that the cache buffer corresponds
298 /* The buffer holding the cache contents. */
300 /* The buffer's size. We try to read as much as fits into a packet
304 /* Cache hit and miss counters. */
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. */
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
324 /* True if we're going through initial connection setup (finding out
325 about the remote side's threads, relocating symbols, etc.). */
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
;
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
;
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
348 /* True if we're connected in extended remote mode. */
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
;
359 /* The status of the stub support for the various vCont actions. */
360 struct vCont_action_support supports_vCont
;
362 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
363 responded to that. */
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
;
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
377 struct serial
*remote_desc
;
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
;
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
;
388 char *last_pass_packet
;
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
;
396 enum gdb_signal last_sent_signal
;
400 /* The execution direction of the last resume we got. */
401 enum exec_direction_kind last_resume_exec_dir
;
403 char *finished_object
;
404 char *finished_annex
;
405 ULONGEST finished_offset
;
407 /* Should we try the 'ThreadInfo' query packet?
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
;
417 threadref echo_nextthread
;
418 threadref nextthread
;
419 threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
421 /* The state of remote notification. */
422 struct remote_notif_state
*notif_state
;
424 /* The branch trace configuration. */
425 struct btrace_config btrace_config
;
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. */
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
;
442 /* Private data that we'll store in (struct thread_info)->private. */
443 struct private_thread_info
449 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
450 sequence of bytes. */
451 gdb::byte_vector
*thread_handle
;
453 /* Whether the target stopped for a breakpoint/watchpoint. */
454 enum target_stop_reason stop_reason
;
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
;
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. */
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
;
470 /* The signal specified in the last target_resume call for this
472 enum gdb_signal last_resume_sig
;
474 /* Whether this thread was already vCont-resumed on the remote
480 free_private_thread_info (struct private_thread_info
*info
)
484 delete info
->thread_handle
;
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
492 static struct remote_state
*remote_state
;
494 static struct remote_state
*
495 get_remote_state_raw (void)
500 /* Allocate a new struct remote_state with xmalloc, initialize it, and
503 static struct remote_state
*
504 new_remote_state (void)
506 struct remote_state
*result
= XCNEW (struct remote_state
);
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
;
520 /* Description of the remote protocol for a given architecture. */
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);
530 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
534 struct remote_arch_state
536 /* Description of the remote protocol registers. */
537 long sizeof_g_packet
;
539 /* Description of the remote protocol registers indexed by REGNUM
540 (making an array gdbarch_num_regs in size). */
541 struct packet_reg
*regs
;
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
549 long actual_register_packet_size
;
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
;
556 /* Utility: generate error from an incoming stub packet. */
558 trace_error (char *buf
)
561 return; /* not an error msg */
564 case '1': /* malformed packet error */
565 if (*++buf
== '0') /* general case: */
566 error (_("remote.c: error in outgoing packet."));
568 error (_("remote.c: error in outgoing packet at field #%ld."),
569 strtol (buf
, NULL
, 16));
571 error (_("Target returns error code '%s'."), buf
);
575 /* Utility: wait for reply from stub, while accepting "O" packets. */
578 remote_get_noisy_reply ()
580 struct remote_state
*rs
= get_remote_state ();
582 do /* Loop on reply from remote stub. */
586 QUIT
; /* Allow user to bail out with ^C. */
587 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
591 else if (startswith (buf
, "qRelocInsn:"))
594 CORE_ADDR from
, to
, org_to
;
596 int adjusted_size
= 0;
599 p
= buf
+ strlen ("qRelocInsn:");
600 pp
= unpack_varlen_hex (p
, &ul
);
602 error (_("invalid qRelocInsn packet: %s"), buf
);
606 unpack_varlen_hex (p
, &ul
);
613 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
616 CATCH (ex
, RETURN_MASK_ALL
)
618 if (ex
.error
== MEMORY_ERROR
)
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. */
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
630 exception_fprintf (gdb_stderr
, ex
,
631 _("warning: relocating instruction: "));
639 adjusted_size
= to
- org_to
;
641 xsnprintf (buf
, rs
->buf_size
, "qRelocInsn:%x", adjusted_size
);
645 else if (buf
[0] == 'O' && buf
[1] != 'K')
646 remote_console_output (buf
+ 1); /* 'O' message from stub */
648 return buf
; /* Here's the actual reply. */
653 /* Handle for retreving the remote protocol data from gdbarch. */
654 static struct gdbarch_data
*remote_gdbarch_data_handle
;
656 static struct remote_arch_state
*
657 get_remote_arch_state (void)
659 gdb_assert (target_gdbarch () != NULL
);
660 return ((struct remote_arch_state
*)
661 gdbarch_data (target_gdbarch (), remote_gdbarch_data_handle
));
664 /* Fetch the global remote target state. */
666 static struct remote_state
*
667 get_remote_state (void)
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
674 get_remote_arch_state ();
676 return get_remote_state_raw ();
679 /* Cleanup routine for the remote module's pspace data. */
682 remote_pspace_data_cleanup (struct program_space
*pspace
, void *arg
)
684 char *remote_exec_file
= (char *) arg
;
686 xfree (remote_exec_file
);
689 /* Fetch the remote exec-file from the current program space. */
692 get_remote_exec_file (void)
694 char *remote_exec_file
;
697 = (char *) program_space_data (current_program_space
,
699 if (remote_exec_file
== NULL
)
702 return remote_exec_file
;
705 /* Set the remote exec file for PSPACE. */
708 set_pspace_remote_exec_file (struct program_space
*pspace
,
709 char *remote_exec_file
)
711 char *old_file
= (char *) program_space_data (pspace
, remote_pspace_data
);
714 set_program_space_data (pspace
, remote_pspace_data
,
715 xstrdup (remote_exec_file
));
718 /* The "set/show remote exec-file" set command hook. */
721 set_remote_exec_file (char *ignored
, int from_tty
,
722 struct cmd_list_element
*c
)
724 gdb_assert (remote_exec_file_var
!= NULL
);
725 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
728 /* The "set/show remote exec-file" show command hook. */
731 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
732 struct cmd_list_element
*cmd
, const char *value
)
734 fprintf_filtered (file
, "%s\n", remote_exec_file_var
);
738 compare_pnums (const void *lhs_
, const void *rhs_
)
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_
;
745 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
747 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
754 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
756 int regnum
, num_remote_regs
, offset
;
757 struct packet_reg
**remote_regs
;
759 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
761 struct packet_reg
*r
= ®s
[regnum
];
763 if (register_size (gdbarch
, regnum
) == 0)
764 /* Do not try to fetch zero-sized (placeholder) registers. */
767 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
772 /* Define the g/G packet format as the contents of each register
773 with a remote protocol number, in order of ascending protocol
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
);
780 if (regs
[regnum
].pnum
!= -1)
781 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
783 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
786 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
788 remote_regs
[regnum
]->in_g_packet
= 1;
789 remote_regs
[regnum
]->offset
= offset
;
790 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
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. */
803 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
804 int *pnum
, int *poffset
)
806 struct packet_reg
*regs
;
807 struct cleanup
*old_chain
;
809 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
811 regs
= XCNEWVEC (struct packet_reg
, gdbarch_num_regs (gdbarch
));
812 old_chain
= make_cleanup (xfree
, regs
);
814 map_regcache_remote_table (gdbarch
, regs
);
816 *pnum
= regs
[regnum
].pnum
;
817 *poffset
= regs
[regnum
].offset
;
819 do_cleanups (old_chain
);
825 init_remote_state (struct gdbarch
*gdbarch
)
827 struct remote_state
*rs
= get_remote_state_raw ();
828 struct remote_arch_state
*rsa
;
830 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
832 /* Use the architecture to build a regnum<->pnum table, which will be
833 1:1 unless a feature set specifies otherwise. */
834 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
835 gdbarch_num_regs (gdbarch
),
838 /* Record the maximum possible size of the g packet - it may turn out
840 rsa
->sizeof_g_packet
= map_regcache_remote_table (gdbarch
, rsa
->regs
);
842 /* Default maximum number of characters in a packet body. Many
843 remote stubs have a hardwired buffer size of 400 bytes
844 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
845 as the maximum packet-size to ensure that the packet and an extra
846 NUL character can always fit in the buffer. This stops GDB
847 trashing stubs that try to squeeze an extra NUL into what is
848 already a full buffer (As of 1999-12-04 that was most stubs). */
849 rsa
->remote_packet_size
= 400 - 1;
851 /* This one is filled in when a ``g'' packet is received. */
852 rsa
->actual_register_packet_size
= 0;
854 /* Should rsa->sizeof_g_packet needs more space than the
855 default, adjust the size accordingly. Remember that each byte is
856 encoded as two characters. 32 is the overhead for the packet
857 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
858 (``$NN:G...#NN'') is a better guess, the below has been padded a
860 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
861 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
863 /* Make sure that the packet buffer is plenty big enough for
864 this architecture. */
865 if (rs
->buf_size
< rsa
->remote_packet_size
)
867 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
868 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
874 /* Return the current allowed size of a remote packet. This is
875 inferred from the current architecture, and should be used to
876 limit the length of outgoing packets. */
878 get_remote_packet_size (void)
880 struct remote_state
*rs
= get_remote_state ();
881 struct remote_arch_state
*rsa
= get_remote_arch_state ();
883 if (rs
->explicit_packet_size
)
884 return rs
->explicit_packet_size
;
886 return rsa
->remote_packet_size
;
889 static struct packet_reg
*
890 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
892 if (regnum
< 0 && regnum
>= gdbarch_num_regs (target_gdbarch ()))
896 struct packet_reg
*r
= &rsa
->regs
[regnum
];
898 gdb_assert (r
->regnum
== regnum
);
903 static struct packet_reg
*
904 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
908 for (i
= 0; i
< gdbarch_num_regs (target_gdbarch ()); i
++)
910 struct packet_reg
*r
= &rsa
->regs
[i
];
918 static struct target_ops remote_ops
;
920 static struct target_ops extended_remote_ops
;
922 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
923 ``forever'' still use the normal timeout mechanism. This is
924 currently used by the ASYNC code to guarentee that target reads
925 during the initial connect always time-out. Once getpkt has been
926 modified to return a timeout indication and, in turn
927 remote_wait()/wait_for_inferior() have gained a timeout parameter
929 static int wait_forever_enabled_p
= 1;
931 /* Allow the user to specify what sequence to send to the remote
932 when he requests a program interruption: Although ^C is usually
933 what remote systems expect (this is the default, here), it is
934 sometimes preferable to send a break. On other systems such
935 as the Linux kernel, a break followed by g, which is Magic SysRq g
936 is required in order to interrupt the execution. */
937 const char interrupt_sequence_control_c
[] = "Ctrl-C";
938 const char interrupt_sequence_break
[] = "BREAK";
939 const char interrupt_sequence_break_g
[] = "BREAK-g";
940 static const char *const interrupt_sequence_modes
[] =
942 interrupt_sequence_control_c
,
943 interrupt_sequence_break
,
944 interrupt_sequence_break_g
,
947 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
950 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
951 struct cmd_list_element
*c
,
954 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
955 fprintf_filtered (file
,
956 _("Send the ASCII ETX character (Ctrl-c) "
957 "to the remote target to interrupt the "
958 "execution of the program.\n"));
959 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
960 fprintf_filtered (file
,
961 _("send a break signal to the remote target "
962 "to interrupt the execution of the program.\n"));
963 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
964 fprintf_filtered (file
,
965 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
966 "the remote target to interrupt the execution "
967 "of Linux kernel.\n"));
969 internal_error (__FILE__
, __LINE__
,
970 _("Invalid value for interrupt_sequence_mode: %s."),
971 interrupt_sequence_mode
);
974 /* This boolean variable specifies whether interrupt_sequence is sent
975 to the remote target when gdb connects to it.
976 This is mostly needed when you debug the Linux kernel: The Linux kernel
977 expects BREAK g which is Magic SysRq g for connecting gdb. */
978 static int interrupt_on_connect
= 0;
980 /* This variable is used to implement the "set/show remotebreak" commands.
981 Since these commands are now deprecated in favor of "set/show remote
982 interrupt-sequence", it no longer has any effect on the code. */
983 static int remote_break
;
986 set_remotebreak (char *args
, int from_tty
, struct cmd_list_element
*c
)
989 interrupt_sequence_mode
= interrupt_sequence_break
;
991 interrupt_sequence_mode
= interrupt_sequence_control_c
;
995 show_remotebreak (struct ui_file
*file
, int from_tty
,
996 struct cmd_list_element
*c
,
1001 /* This variable sets the number of bits in an address that are to be
1002 sent in a memory ("M" or "m") packet. Normally, after stripping
1003 leading zeros, the entire address would be sent. This variable
1004 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1005 initial implementation of remote.c restricted the address sent in
1006 memory packets to ``host::sizeof long'' bytes - (typically 32
1007 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1008 address was never sent. Since fixing this bug may cause a break in
1009 some remote targets this variable is principly provided to
1010 facilitate backward compatibility. */
1012 static unsigned int remote_address_size
;
1014 /* Temporary to track who currently owns the terminal. See
1015 remote_terminal_* for more details. */
1017 static int remote_async_terminal_ours_p
;
1020 /* User configurable variables for the number of characters in a
1021 memory read/write packet. MIN (rsa->remote_packet_size,
1022 rsa->sizeof_g_packet) is the default. Some targets need smaller
1023 values (fifo overruns, et.al.) and some users need larger values
1024 (speed up transfers). The variables ``preferred_*'' (the user
1025 request), ``current_*'' (what was actually set) and ``forced_*''
1026 (Positive - a soft limit, negative - a hard limit). */
1028 struct memory_packet_config
1035 /* The default max memory-write-packet-size. The 16k is historical.
1036 (It came from older GDB's using alloca for buffers and the
1037 knowledge (folklore?) that some hosts don't cope very well with
1038 large alloca calls.) */
1039 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1041 /* The minimum remote packet size for memory transfers. Ensures we
1042 can write at least one byte. */
1043 #define MIN_MEMORY_PACKET_SIZE 20
1045 /* Compute the current size of a read/write packet. Since this makes
1046 use of ``actual_register_packet_size'' the computation is dynamic. */
1049 get_memory_packet_size (struct memory_packet_config
*config
)
1051 struct remote_state
*rs
= get_remote_state ();
1052 struct remote_arch_state
*rsa
= get_remote_arch_state ();
1055 if (config
->fixed_p
)
1057 if (config
->size
<= 0)
1058 what_they_get
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1060 what_they_get
= config
->size
;
1064 what_they_get
= get_remote_packet_size ();
1065 /* Limit the packet to the size specified by the user. */
1066 if (config
->size
> 0
1067 && what_they_get
> config
->size
)
1068 what_they_get
= config
->size
;
1070 /* Limit it to the size of the targets ``g'' response unless we have
1071 permission from the stub to use a larger packet size. */
1072 if (rs
->explicit_packet_size
== 0
1073 && rsa
->actual_register_packet_size
> 0
1074 && what_they_get
> rsa
->actual_register_packet_size
)
1075 what_they_get
= rsa
->actual_register_packet_size
;
1077 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1078 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1080 /* Make sure there is room in the global buffer for this packet
1081 (including its trailing NUL byte). */
1082 if (rs
->buf_size
< what_they_get
+ 1)
1084 rs
->buf_size
= 2 * what_they_get
;
1085 rs
->buf
= (char *) xrealloc (rs
->buf
, 2 * what_they_get
);
1088 return what_they_get
;
1091 /* Update the size of a read/write packet. If they user wants
1092 something really big then do a sanity check. */
1095 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1097 int fixed_p
= config
->fixed_p
;
1098 long size
= config
->size
;
1101 error (_("Argument required (integer, `fixed' or `limited')."));
1102 else if (strcmp (args
, "hard") == 0
1103 || strcmp (args
, "fixed") == 0)
1105 else if (strcmp (args
, "soft") == 0
1106 || strcmp (args
, "limit") == 0)
1112 size
= strtoul (args
, &end
, 0);
1114 error (_("Invalid %s (bad syntax)."), config
->name
);
1116 /* Instead of explicitly capping the size of a packet to or
1117 disallowing it, the user is allowed to set the size to
1118 something arbitrarily large. */
1121 /* So that the query shows the correct value. */
1123 size
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1126 if (fixed_p
&& !config
->fixed_p
)
1128 if (! query (_("The target may not be able to correctly handle a %s\n"
1129 "of %ld bytes. Change the packet size? "),
1130 config
->name
, size
))
1131 error (_("Packet size not changed."));
1133 /* Update the config. */
1134 config
->fixed_p
= fixed_p
;
1135 config
->size
= size
;
1139 show_memory_packet_size (struct memory_packet_config
*config
)
1141 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1142 if (config
->fixed_p
)
1143 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1144 get_memory_packet_size (config
));
1146 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1147 get_memory_packet_size (config
));
1150 static struct memory_packet_config memory_write_packet_config
=
1152 "memory-write-packet-size",
1156 set_memory_write_packet_size (const char *args
, int from_tty
)
1158 set_memory_packet_size (args
, &memory_write_packet_config
);
1162 show_memory_write_packet_size (const char *args
, int from_tty
)
1164 show_memory_packet_size (&memory_write_packet_config
);
1168 get_memory_write_packet_size (void)
1170 return get_memory_packet_size (&memory_write_packet_config
);
1173 static struct memory_packet_config memory_read_packet_config
=
1175 "memory-read-packet-size",
1179 set_memory_read_packet_size (const char *args
, int from_tty
)
1181 set_memory_packet_size (args
, &memory_read_packet_config
);
1185 show_memory_read_packet_size (const char *args
, int from_tty
)
1187 show_memory_packet_size (&memory_read_packet_config
);
1191 get_memory_read_packet_size (void)
1193 long size
= get_memory_packet_size (&memory_read_packet_config
);
1195 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1196 extra buffer size argument before the memory read size can be
1197 increased beyond this. */
1198 if (size
> get_remote_packet_size ())
1199 size
= get_remote_packet_size ();
1204 /* Generic configuration support for packets the stub optionally
1205 supports. Allows the user to specify the use of the packet as well
1206 as allowing GDB to auto-detect support in the remote stub. */
1210 PACKET_SUPPORT_UNKNOWN
= 0,
1215 struct packet_config
1220 /* If auto, GDB auto-detects support for this packet or feature,
1221 either through qSupported, or by trying the packet and looking
1222 at the response. If true, GDB assumes the target supports this
1223 packet. If false, the packet is disabled. Configs that don't
1224 have an associated command always have this set to auto. */
1225 enum auto_boolean detect
;
1227 /* Does the target support this packet? */
1228 enum packet_support support
;
1231 /* Analyze a packet's return value and update the packet config
1241 static enum packet_support
packet_config_support (struct packet_config
*config
);
1242 static enum packet_support
packet_support (int packet
);
1245 show_packet_config_cmd (struct packet_config
*config
)
1247 const char *support
= "internal-error";
1249 switch (packet_config_support (config
))
1252 support
= "enabled";
1254 case PACKET_DISABLE
:
1255 support
= "disabled";
1257 case PACKET_SUPPORT_UNKNOWN
:
1258 support
= "unknown";
1261 switch (config
->detect
)
1263 case AUTO_BOOLEAN_AUTO
:
1264 printf_filtered (_("Support for the `%s' packet "
1265 "is auto-detected, currently %s.\n"),
1266 config
->name
, support
);
1268 case AUTO_BOOLEAN_TRUE
:
1269 case AUTO_BOOLEAN_FALSE
:
1270 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1271 config
->name
, support
);
1277 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1278 const char *title
, int legacy
)
1284 config
->name
= name
;
1285 config
->title
= title
;
1286 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1288 show_doc
= xstrprintf ("Show current use of remote "
1289 "protocol `%s' (%s) packet",
1291 /* set/show TITLE-packet {auto,on,off} */
1292 cmd_name
= xstrprintf ("%s-packet", title
);
1293 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1294 &config
->detect
, set_doc
,
1295 show_doc
, NULL
, /* help_doc */
1297 show_remote_protocol_packet_cmd
,
1298 &remote_set_cmdlist
, &remote_show_cmdlist
);
1299 /* The command code copies the documentation strings. */
1302 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1307 legacy_name
= xstrprintf ("%s-packet", name
);
1308 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1309 &remote_set_cmdlist
);
1310 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1311 &remote_show_cmdlist
);
1315 static enum packet_result
1316 packet_check_result (const char *buf
)
1320 /* The stub recognized the packet request. Check that the
1321 operation succeeded. */
1323 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1325 /* "Enn" - definitly an error. */
1326 return PACKET_ERROR
;
1328 /* Always treat "E." as an error. This will be used for
1329 more verbose error messages, such as E.memtypes. */
1330 if (buf
[0] == 'E' && buf
[1] == '.')
1331 return PACKET_ERROR
;
1333 /* The packet may or may not be OK. Just assume it is. */
1337 /* The stub does not support the packet. */
1338 return PACKET_UNKNOWN
;
1341 static enum packet_result
1342 packet_ok (const char *buf
, struct packet_config
*config
)
1344 enum packet_result result
;
1346 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1347 && config
->support
== PACKET_DISABLE
)
1348 internal_error (__FILE__
, __LINE__
,
1349 _("packet_ok: attempt to use a disabled packet"));
1351 result
= packet_check_result (buf
);
1356 /* The stub recognized the packet request. */
1357 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1360 fprintf_unfiltered (gdb_stdlog
,
1361 "Packet %s (%s) is supported\n",
1362 config
->name
, config
->title
);
1363 config
->support
= PACKET_ENABLE
;
1366 case PACKET_UNKNOWN
:
1367 /* The stub does not support the packet. */
1368 if (config
->detect
== AUTO_BOOLEAN_AUTO
1369 && config
->support
== PACKET_ENABLE
)
1371 /* If the stub previously indicated that the packet was
1372 supported then there is a protocol error. */
1373 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1374 config
->name
, config
->title
);
1376 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
1378 /* The user set it wrong. */
1379 error (_("Enabled packet %s (%s) not recognized by stub"),
1380 config
->name
, config
->title
);
1384 fprintf_unfiltered (gdb_stdlog
,
1385 "Packet %s (%s) is NOT supported\n",
1386 config
->name
, config
->title
);
1387 config
->support
= PACKET_DISABLE
;
1408 PACKET_vFile_pwrite
,
1410 PACKET_vFile_unlink
,
1411 PACKET_vFile_readlink
,
1414 PACKET_qXfer_features
,
1415 PACKET_qXfer_exec_file
,
1416 PACKET_qXfer_libraries
,
1417 PACKET_qXfer_libraries_svr4
,
1418 PACKET_qXfer_memory_map
,
1419 PACKET_qXfer_spu_read
,
1420 PACKET_qXfer_spu_write
,
1421 PACKET_qXfer_osdata
,
1422 PACKET_qXfer_threads
,
1423 PACKET_qXfer_statictrace_read
,
1424 PACKET_qXfer_traceframe_info
,
1430 PACKET_QPassSignals
,
1431 PACKET_QCatchSyscalls
,
1432 PACKET_QProgramSignals
,
1433 PACKET_QSetWorkingDir
,
1434 PACKET_QStartupWithShell
,
1435 PACKET_QEnvironmentHexEncoded
,
1436 PACKET_QEnvironmentReset
,
1437 PACKET_QEnvironmentUnset
,
1439 PACKET_qSearch_memory
,
1442 PACKET_QStartNoAckMode
,
1444 PACKET_qXfer_siginfo_read
,
1445 PACKET_qXfer_siginfo_write
,
1448 /* Support for conditional tracepoints. */
1449 PACKET_ConditionalTracepoints
,
1451 /* Support for target-side breakpoint conditions. */
1452 PACKET_ConditionalBreakpoints
,
1454 /* Support for target-side breakpoint commands. */
1455 PACKET_BreakpointCommands
,
1457 /* Support for fast tracepoints. */
1458 PACKET_FastTracepoints
,
1460 /* Support for static tracepoints. */
1461 PACKET_StaticTracepoints
,
1463 /* Support for installing tracepoints while a trace experiment is
1465 PACKET_InstallInTrace
,
1469 PACKET_TracepointSource
,
1472 PACKET_QDisableRandomization
,
1474 PACKET_QTBuffer_size
,
1478 PACKET_qXfer_btrace
,
1480 /* Support for the QNonStop packet. */
1483 /* Support for the QThreadEvents packet. */
1484 PACKET_QThreadEvents
,
1486 /* Support for multi-process extensions. */
1487 PACKET_multiprocess_feature
,
1489 /* Support for enabling and disabling tracepoints while a trace
1490 experiment is running. */
1491 PACKET_EnableDisableTracepoints_feature
,
1493 /* Support for collecting strings using the tracenz bytecode. */
1494 PACKET_tracenz_feature
,
1496 /* Support for continuing to run a trace experiment while GDB is
1498 PACKET_DisconnectedTracing_feature
,
1500 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1501 PACKET_augmented_libraries_svr4_read_feature
,
1503 /* Support for the qXfer:btrace-conf:read packet. */
1504 PACKET_qXfer_btrace_conf
,
1506 /* Support for the Qbtrace-conf:bts:size packet. */
1507 PACKET_Qbtrace_conf_bts_size
,
1509 /* Support for swbreak+ feature. */
1510 PACKET_swbreak_feature
,
1512 /* Support for hwbreak+ feature. */
1513 PACKET_hwbreak_feature
,
1515 /* Support for fork events. */
1516 PACKET_fork_event_feature
,
1518 /* Support for vfork events. */
1519 PACKET_vfork_event_feature
,
1521 /* Support for the Qbtrace-conf:pt:size packet. */
1522 PACKET_Qbtrace_conf_pt_size
,
1524 /* Support for exec events. */
1525 PACKET_exec_event_feature
,
1527 /* Support for query supported vCont actions. */
1528 PACKET_vContSupported
,
1530 /* Support remote CTRL-C. */
1533 /* Support TARGET_WAITKIND_NO_RESUMED. */
1539 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1541 /* Returns the packet's corresponding "set remote foo-packet" command
1542 state. See struct packet_config for more details. */
1544 static enum auto_boolean
1545 packet_set_cmd_state (int packet
)
1547 return remote_protocol_packets
[packet
].detect
;
1550 /* Returns whether a given packet or feature is supported. This takes
1551 into account the state of the corresponding "set remote foo-packet"
1552 command, which may be used to bypass auto-detection. */
1554 static enum packet_support
1555 packet_config_support (struct packet_config
*config
)
1557 switch (config
->detect
)
1559 case AUTO_BOOLEAN_TRUE
:
1560 return PACKET_ENABLE
;
1561 case AUTO_BOOLEAN_FALSE
:
1562 return PACKET_DISABLE
;
1563 case AUTO_BOOLEAN_AUTO
:
1564 return config
->support
;
1566 gdb_assert_not_reached (_("bad switch"));
1570 /* Same as packet_config_support, but takes the packet's enum value as
1573 static enum packet_support
1574 packet_support (int packet
)
1576 struct packet_config
*config
= &remote_protocol_packets
[packet
];
1578 return packet_config_support (config
);
1582 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1583 struct cmd_list_element
*c
,
1586 struct packet_config
*packet
;
1588 for (packet
= remote_protocol_packets
;
1589 packet
< &remote_protocol_packets
[PACKET_MAX
];
1592 if (&packet
->detect
== c
->var
)
1594 show_packet_config_cmd (packet
);
1598 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
1602 /* Should we try one of the 'Z' requests? */
1606 Z_PACKET_SOFTWARE_BP
,
1607 Z_PACKET_HARDWARE_BP
,
1614 /* For compatibility with older distributions. Provide a ``set remote
1615 Z-packet ...'' command that updates all the Z packet types. */
1617 static enum auto_boolean remote_Z_packet_detect
;
1620 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1621 struct cmd_list_element
*c
)
1625 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1626 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1630 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1631 struct cmd_list_element
*c
,
1636 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1638 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1642 /* Returns true if the multi-process extensions are in effect. */
1645 remote_multi_process_p (struct remote_state
*rs
)
1647 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
1650 /* Returns true if fork events are supported. */
1653 remote_fork_event_p (struct remote_state
*rs
)
1655 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
1658 /* Returns true if vfork events are supported. */
1661 remote_vfork_event_p (struct remote_state
*rs
)
1663 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
1666 /* Returns true if exec events are supported. */
1669 remote_exec_event_p (struct remote_state
*rs
)
1671 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
1674 /* Insert fork catchpoint target routine. If fork events are enabled
1675 then return success, nothing more to do. */
1678 remote_insert_fork_catchpoint (struct target_ops
*ops
, int pid
)
1680 struct remote_state
*rs
= get_remote_state ();
1682 return !remote_fork_event_p (rs
);
1685 /* Remove fork catchpoint target routine. Nothing to do, just
1689 remote_remove_fork_catchpoint (struct target_ops
*ops
, int pid
)
1694 /* Insert vfork catchpoint target routine. If vfork events are enabled
1695 then return success, nothing more to do. */
1698 remote_insert_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1700 struct remote_state
*rs
= get_remote_state ();
1702 return !remote_vfork_event_p (rs
);
1705 /* Remove vfork catchpoint target routine. Nothing to do, just
1709 remote_remove_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1714 /* Insert exec catchpoint target routine. If exec events are
1715 enabled, just return success. */
1718 remote_insert_exec_catchpoint (struct target_ops
*ops
, int pid
)
1720 struct remote_state
*rs
= get_remote_state ();
1722 return !remote_exec_event_p (rs
);
1725 /* Remove exec catchpoint target routine. Nothing to do, just
1729 remote_remove_exec_catchpoint (struct target_ops
*ops
, int pid
)
1735 /* Asynchronous signal handle registered as event loop source for
1736 when we have pending events ready to be passed to the core. */
1738 static struct async_event_handler
*remote_async_inferior_event_token
;
1742 static ptid_t magic_null_ptid
;
1743 static ptid_t not_sent_ptid
;
1744 static ptid_t any_thread_ptid
;
1746 /* Find out if the stub attached to PID (and hence GDB should offer to
1747 detach instead of killing it when bailing out). */
1750 remote_query_attached (int pid
)
1752 struct remote_state
*rs
= get_remote_state ();
1753 size_t size
= get_remote_packet_size ();
1755 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
1758 if (remote_multi_process_p (rs
))
1759 xsnprintf (rs
->buf
, size
, "qAttached:%x", pid
);
1761 xsnprintf (rs
->buf
, size
, "qAttached");
1764 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1766 switch (packet_ok (rs
->buf
,
1767 &remote_protocol_packets
[PACKET_qAttached
]))
1770 if (strcmp (rs
->buf
, "1") == 0)
1774 warning (_("Remote failure reply: %s"), rs
->buf
);
1776 case PACKET_UNKNOWN
:
1783 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1784 has been invented by GDB, instead of reported by the target. Since
1785 we can be connected to a remote system before before knowing about
1786 any inferior, mark the target with execution when we find the first
1787 inferior. If ATTACHED is 1, then we had just attached to this
1788 inferior. If it is 0, then we just created this inferior. If it
1789 is -1, then try querying the remote stub to find out if it had
1790 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1791 attempt to open this inferior's executable as the main executable
1792 if no main executable is open already. */
1794 static struct inferior
*
1795 remote_add_inferior (int fake_pid_p
, int pid
, int attached
,
1798 struct inferior
*inf
;
1800 /* Check whether this process we're learning about is to be
1801 considered attached, or if is to be considered to have been
1802 spawned by the stub. */
1804 attached
= remote_query_attached (pid
);
1806 if (gdbarch_has_global_solist (target_gdbarch ()))
1808 /* If the target shares code across all inferiors, then every
1809 attach adds a new inferior. */
1810 inf
= add_inferior (pid
);
1812 /* ... and every inferior is bound to the same program space.
1813 However, each inferior may still have its own address
1815 inf
->aspace
= maybe_new_address_space ();
1816 inf
->pspace
= current_program_space
;
1820 /* In the traditional debugging scenario, there's a 1-1 match
1821 between program/address spaces. We simply bind the inferior
1822 to the program space's address space. */
1823 inf
= current_inferior ();
1824 inferior_appeared (inf
, pid
);
1827 inf
->attach_flag
= attached
;
1828 inf
->fake_pid_p
= fake_pid_p
;
1830 /* If no main executable is currently open then attempt to
1831 open the file that was executed to create this inferior. */
1832 if (try_open_exec
&& get_exec_file (0) == NULL
)
1833 exec_file_locate_attach (pid
, 0, 1);
1838 static struct private_thread_info
*
1839 get_private_info_thread (struct thread_info
*info
);
1841 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1842 according to RUNNING. */
1845 remote_add_thread (ptid_t ptid
, int running
, int executing
)
1847 struct remote_state
*rs
= get_remote_state ();
1848 struct thread_info
*thread
;
1850 /* GDB historically didn't pull threads in the initial connection
1851 setup. If the remote target doesn't even have a concept of
1852 threads (e.g., a bare-metal target), even if internally we
1853 consider that a single-threaded target, mentioning a new thread
1854 might be confusing to the user. Be silent then, preserving the
1855 age old behavior. */
1856 if (rs
->starting_up
)
1857 thread
= add_thread_silent (ptid
);
1859 thread
= add_thread (ptid
);
1861 get_private_info_thread (thread
)->vcont_resumed
= executing
;
1862 set_executing (ptid
, executing
);
1863 set_running (ptid
, running
);
1866 /* Come here when we learn about a thread id from the remote target.
1867 It may be the first time we hear about such thread, so take the
1868 opportunity to add it to GDB's thread list. In case this is the
1869 first time we're noticing its corresponding inferior, add it to
1870 GDB's inferior list as well. EXECUTING indicates whether the
1871 thread is (internally) executing or stopped. */
1874 remote_notice_new_inferior (ptid_t currthread
, int executing
)
1876 /* In non-stop mode, we assume new found threads are (externally)
1877 running until proven otherwise with a stop reply. In all-stop,
1878 we can only get here if all threads are stopped. */
1879 int running
= target_is_non_stop_p () ? 1 : 0;
1881 /* If this is a new thread, add it to GDB's thread list.
1882 If we leave it up to WFI to do this, bad things will happen. */
1884 if (in_thread_list (currthread
) && is_exited (currthread
))
1886 /* We're seeing an event on a thread id we knew had exited.
1887 This has to be a new thread reusing the old id. Add it. */
1888 remote_add_thread (currthread
, running
, executing
);
1892 if (!in_thread_list (currthread
))
1894 struct inferior
*inf
= NULL
;
1895 int pid
= ptid_get_pid (currthread
);
1897 if (ptid_is_pid (inferior_ptid
)
1898 && pid
== ptid_get_pid (inferior_ptid
))
1900 /* inferior_ptid has no thread member yet. This can happen
1901 with the vAttach -> remote_wait,"TAAthread:" path if the
1902 stub doesn't support qC. This is the first stop reported
1903 after an attach, so this is the main thread. Update the
1904 ptid in the thread list. */
1905 if (in_thread_list (pid_to_ptid (pid
)))
1906 thread_change_ptid (inferior_ptid
, currthread
);
1909 remote_add_thread (currthread
, running
, executing
);
1910 inferior_ptid
= currthread
;
1915 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1917 /* inferior_ptid is not set yet. This can happen with the
1918 vRun -> remote_wait,"TAAthread:" path if the stub
1919 doesn't support qC. This is the first stop reported
1920 after an attach, so this is the main thread. Update the
1921 ptid in the thread list. */
1922 thread_change_ptid (inferior_ptid
, currthread
);
1926 /* When connecting to a target remote, or to a target
1927 extended-remote which already was debugging an inferior, we
1928 may not know about it yet. Add it before adding its child
1929 thread, so notifications are emitted in a sensible order. */
1930 if (!in_inferior_list (ptid_get_pid (currthread
)))
1932 struct remote_state
*rs
= get_remote_state ();
1933 int fake_pid_p
= !remote_multi_process_p (rs
);
1935 inf
= remote_add_inferior (fake_pid_p
,
1936 ptid_get_pid (currthread
), -1, 1);
1939 /* This is really a new thread. Add it. */
1940 remote_add_thread (currthread
, running
, executing
);
1942 /* If we found a new inferior, let the common code do whatever
1943 it needs to with it (e.g., read shared libraries, insert
1944 breakpoints), unless we're just setting up an all-stop
1948 struct remote_state
*rs
= get_remote_state ();
1950 if (!rs
->starting_up
)
1951 notice_new_inferior (currthread
, executing
, 0);
1956 /* Return THREAD's private thread data, creating it if necessary. */
1958 static struct private_thread_info
*
1959 get_private_info_thread (struct thread_info
*thread
)
1961 gdb_assert (thread
!= NULL
);
1963 if (thread
->priv
== NULL
)
1965 struct private_thread_info
*priv
= XNEW (struct private_thread_info
);
1967 thread
->private_dtor
= free_private_thread_info
;
1968 thread
->priv
= priv
;
1974 priv
->last_resume_step
= 0;
1975 priv
->last_resume_sig
= GDB_SIGNAL_0
;
1976 priv
->vcont_resumed
= 0;
1977 priv
->thread_handle
= nullptr;
1980 return thread
->priv
;
1983 /* Return PTID's private thread data, creating it if necessary. */
1985 static struct private_thread_info
*
1986 get_private_info_ptid (ptid_t ptid
)
1988 struct thread_info
*info
= find_thread_ptid (ptid
);
1990 return get_private_info_thread (info
);
1993 /* Call this function as a result of
1994 1) A halt indication (T packet) containing a thread id
1995 2) A direct query of currthread
1996 3) Successful execution of set thread */
1999 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
2001 rs
->general_thread
= currthread
;
2004 /* If 'QPassSignals' is supported, tell the remote stub what signals
2005 it can simply pass through to the inferior without reporting. */
2008 remote_pass_signals (struct target_ops
*self
,
2009 int numsigs
, unsigned char *pass_signals
)
2011 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
2013 char *pass_packet
, *p
;
2015 struct remote_state
*rs
= get_remote_state ();
2017 gdb_assert (numsigs
< 256);
2018 for (i
= 0; i
< numsigs
; i
++)
2020 if (pass_signals
[i
])
2023 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
2024 strcpy (pass_packet
, "QPassSignals:");
2025 p
= pass_packet
+ strlen (pass_packet
);
2026 for (i
= 0; i
< numsigs
; i
++)
2028 if (pass_signals
[i
])
2031 *p
++ = tohex (i
>> 4);
2032 *p
++ = tohex (i
& 15);
2041 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2043 putpkt (pass_packet
);
2044 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2045 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2046 if (rs
->last_pass_packet
)
2047 xfree (rs
->last_pass_packet
);
2048 rs
->last_pass_packet
= pass_packet
;
2051 xfree (pass_packet
);
2055 /* If 'QCatchSyscalls' is supported, tell the remote stub
2056 to report syscalls to GDB. */
2059 remote_set_syscall_catchpoint (struct target_ops
*self
,
2060 int pid
, int needed
, int any_count
,
2061 int table_size
, int *table
)
2064 enum packet_result result
;
2067 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2069 /* Not supported. */
2073 if (needed
&& !any_count
)
2077 /* Count how many syscalls are to be caught (table[sysno] != 0). */
2078 for (i
= 0; i
< table_size
; i
++)
2087 fprintf_unfiltered (gdb_stdlog
,
2088 "remote_set_syscall_catchpoint "
2089 "pid %d needed %d any_count %d n_sysno %d\n",
2090 pid
, needed
, any_count
, n_sysno
);
2095 /* Prepare a packet with the sysno list, assuming max 8+1
2096 characters for a sysno. If the resulting packet size is too
2097 big, fallback on the non-selective packet. */
2098 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2100 catch_packet
= (char *) xmalloc (maxpktsz
);
2101 strcpy (catch_packet
, "QCatchSyscalls:1");
2110 /* Add in catch_packet each syscall to be caught (table[i] != 0). */
2111 for (i
= 0; i
< table_size
; i
++)
2114 p
+= xsnprintf (p
, catch_packet
+ maxpktsz
- p
, ";%x", i
);
2117 if (strlen (catch_packet
) > get_remote_packet_size ())
2119 /* catch_packet too big. Fallback to less efficient
2120 non selective mode, with GDB doing the filtering. */
2121 catch_packet
[sizeof ("QCatchSyscalls:1") - 1] = 0;
2125 catch_packet
= xstrdup ("QCatchSyscalls:0");
2128 struct cleanup
*old_chain
= make_cleanup (xfree
, catch_packet
);
2129 struct remote_state
*rs
= get_remote_state ();
2131 putpkt (catch_packet
);
2132 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2133 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2134 do_cleanups (old_chain
);
2135 if (result
== PACKET_OK
)
2142 /* If 'QProgramSignals' is supported, tell the remote stub what
2143 signals it should pass through to the inferior when detaching. */
2146 remote_program_signals (struct target_ops
*self
,
2147 int numsigs
, unsigned char *signals
)
2149 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2153 struct remote_state
*rs
= get_remote_state ();
2155 gdb_assert (numsigs
< 256);
2156 for (i
= 0; i
< numsigs
; i
++)
2161 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2162 strcpy (packet
, "QProgramSignals:");
2163 p
= packet
+ strlen (packet
);
2164 for (i
= 0; i
< numsigs
; i
++)
2166 if (signal_pass_state (i
))
2169 *p
++ = tohex (i
>> 4);
2170 *p
++ = tohex (i
& 15);
2179 if (!rs
->last_program_signals_packet
2180 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2183 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2184 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2185 xfree (rs
->last_program_signals_packet
);
2186 rs
->last_program_signals_packet
= packet
;
2193 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2194 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2195 thread. If GEN is set, set the general thread, if not, then set
2196 the step/continue thread. */
2198 set_thread (ptid_t ptid
, int gen
)
2200 struct remote_state
*rs
= get_remote_state ();
2201 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2202 char *buf
= rs
->buf
;
2203 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
2205 if (ptid_equal (state
, ptid
))
2209 *buf
++ = gen
? 'g' : 'c';
2210 if (ptid_equal (ptid
, magic_null_ptid
))
2211 xsnprintf (buf
, endbuf
- buf
, "0");
2212 else if (ptid_equal (ptid
, any_thread_ptid
))
2213 xsnprintf (buf
, endbuf
- buf
, "0");
2214 else if (ptid_equal (ptid
, minus_one_ptid
))
2215 xsnprintf (buf
, endbuf
- buf
, "-1");
2217 write_ptid (buf
, endbuf
, ptid
);
2219 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2221 rs
->general_thread
= ptid
;
2223 rs
->continue_thread
= ptid
;
2227 set_general_thread (ptid_t ptid
)
2229 set_thread (ptid
, 1);
2233 set_continue_thread (ptid_t ptid
)
2235 set_thread (ptid
, 0);
2238 /* Change the remote current process. Which thread within the process
2239 ends up selected isn't important, as long as it is the same process
2240 as what INFERIOR_PTID points to.
2242 This comes from that fact that there is no explicit notion of
2243 "selected process" in the protocol. The selected process for
2244 general operations is the process the selected general thread
2248 set_general_process (void)
2250 struct remote_state
*rs
= get_remote_state ();
2252 /* If the remote can't handle multiple processes, don't bother. */
2253 if (!remote_multi_process_p (rs
))
2256 /* We only need to change the remote current thread if it's pointing
2257 at some other process. */
2258 if (ptid_get_pid (rs
->general_thread
) != ptid_get_pid (inferior_ptid
))
2259 set_general_thread (inferior_ptid
);
2263 /* Return nonzero if this is the main thread that we made up ourselves
2264 to model non-threaded targets as single-threaded. */
2267 remote_thread_always_alive (struct target_ops
*ops
, ptid_t ptid
)
2269 if (ptid_equal (ptid
, magic_null_ptid
))
2270 /* The main thread is always alive. */
2273 if (ptid_get_pid (ptid
) != 0 && ptid_get_lwp (ptid
) == 0)
2274 /* The main thread is always alive. This can happen after a
2275 vAttach, if the remote side doesn't support
2282 /* Return nonzero if the thread PTID is still alive on the remote
2286 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
2288 struct remote_state
*rs
= get_remote_state ();
2291 /* Check if this is a thread that we made up ourselves to model
2292 non-threaded targets as single-threaded. */
2293 if (remote_thread_always_alive (ops
, ptid
))
2297 endp
= rs
->buf
+ get_remote_packet_size ();
2300 write_ptid (p
, endp
, ptid
);
2303 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2304 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2307 /* Return a pointer to a thread name if we know it and NULL otherwise.
2308 The thread_info object owns the memory for the name. */
2311 remote_thread_name (struct target_ops
*ops
, struct thread_info
*info
)
2313 if (info
->priv
!= NULL
)
2314 return info
->priv
->name
;
2319 /* About these extended threadlist and threadinfo packets. They are
2320 variable length packets but, the fields within them are often fixed
2321 length. They are redundent enough to send over UDP as is the
2322 remote protocol in general. There is a matching unit test module
2325 /* WARNING: This threadref data structure comes from the remote O.S.,
2326 libstub protocol encoding, and remote.c. It is not particularly
2329 /* Right now, the internal structure is int. We want it to be bigger.
2330 Plan to fix this. */
2332 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2334 /* gdb_ext_thread_info is an internal GDB data structure which is
2335 equivalent to the reply of the remote threadinfo packet. */
2337 struct gdb_ext_thread_info
2339 threadref threadid
; /* External form of thread reference. */
2340 int active
; /* Has state interesting to GDB?
2342 char display
[256]; /* Brief state display, name,
2343 blocked/suspended. */
2344 char shortname
[32]; /* To be used to name threads. */
2345 char more_display
[256]; /* Long info, statistics, queue depth,
2349 /* The volume of remote transfers can be limited by submitting
2350 a mask containing bits specifying the desired information.
2351 Use a union of these values as the 'selection' parameter to
2352 get_thread_info. FIXME: Make these TAG names more thread specific. */
2354 #define TAG_THREADID 1
2355 #define TAG_EXISTS 2
2356 #define TAG_DISPLAY 4
2357 #define TAG_THREADNAME 8
2358 #define TAG_MOREDISPLAY 16
2360 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2362 static char *unpack_nibble (char *buf
, int *val
);
2364 static char *unpack_byte (char *buf
, int *value
);
2366 static char *pack_int (char *buf
, int value
);
2368 static char *unpack_int (char *buf
, int *value
);
2370 static char *unpack_string (char *src
, char *dest
, int length
);
2372 static char *pack_threadid (char *pkt
, threadref
*id
);
2374 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2376 void int_to_threadref (threadref
*id
, int value
);
2378 static int threadref_to_int (threadref
*ref
);
2380 static void copy_threadref (threadref
*dest
, threadref
*src
);
2382 static int threadmatch (threadref
*dest
, threadref
*src
);
2384 static char *pack_threadinfo_request (char *pkt
, int mode
,
2387 static int remote_unpack_thread_info_response (char *pkt
,
2388 threadref
*expectedref
,
2389 struct gdb_ext_thread_info
2393 static int remote_get_threadinfo (threadref
*threadid
,
2394 int fieldset
, /*TAG mask */
2395 struct gdb_ext_thread_info
*info
);
2397 static char *pack_threadlist_request (char *pkt
, int startflag
,
2399 threadref
*nextthread
);
2401 static int parse_threadlist_response (char *pkt
,
2403 threadref
*original_echo
,
2404 threadref
*resultlist
,
2407 static int remote_get_threadlist (int startflag
,
2408 threadref
*nextthread
,
2412 threadref
*threadlist
);
2414 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
2416 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
2417 void *context
, int looplimit
);
2419 static int remote_newthread_step (threadref
*ref
, void *context
);
2422 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2423 buffer we're allowed to write to. Returns
2424 BUF+CHARACTERS_WRITTEN. */
2427 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2430 struct remote_state
*rs
= get_remote_state ();
2432 if (remote_multi_process_p (rs
))
2434 pid
= ptid_get_pid (ptid
);
2436 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2438 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2440 tid
= ptid_get_lwp (ptid
);
2442 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2444 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2449 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2450 last parsed char. Returns null_ptid if no thread id is found, and
2451 throws an error if the thread id has an invalid format. */
2454 read_ptid (const char *buf
, const char **obuf
)
2456 const char *p
= buf
;
2458 ULONGEST pid
= 0, tid
= 0;
2462 /* Multi-process ptid. */
2463 pp
= unpack_varlen_hex (p
+ 1, &pid
);
2465 error (_("invalid remote ptid: %s"), p
);
2468 pp
= unpack_varlen_hex (p
+ 1, &tid
);
2471 return ptid_build (pid
, tid
, 0);
2474 /* No multi-process. Just a tid. */
2475 pp
= unpack_varlen_hex (p
, &tid
);
2477 /* Return null_ptid when no thread id is found. */
2485 /* Since the stub is not sending a process id, then default to
2486 what's in inferior_ptid, unless it's null at this point. If so,
2487 then since there's no way to know the pid of the reported
2488 threads, use the magic number. */
2489 if (ptid_equal (inferior_ptid
, null_ptid
))
2490 pid
= ptid_get_pid (magic_null_ptid
);
2492 pid
= ptid_get_pid (inferior_ptid
);
2496 return ptid_build (pid
, tid
, 0);
2502 if (ch
>= 'a' && ch
<= 'f')
2503 return ch
- 'a' + 10;
2504 if (ch
>= '0' && ch
<= '9')
2506 if (ch
>= 'A' && ch
<= 'F')
2507 return ch
- 'A' + 10;
2512 stub_unpack_int (char *buff
, int fieldlength
)
2519 nibble
= stubhex (*buff
++);
2523 retval
= retval
<< 4;
2529 unpack_nibble (char *buf
, int *val
)
2531 *val
= fromhex (*buf
++);
2536 unpack_byte (char *buf
, int *value
)
2538 *value
= stub_unpack_int (buf
, 2);
2543 pack_int (char *buf
, int value
)
2545 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
2546 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
2547 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
2548 buf
= pack_hex_byte (buf
, (value
& 0xff));
2553 unpack_int (char *buf
, int *value
)
2555 *value
= stub_unpack_int (buf
, 8);
2559 #if 0 /* Currently unused, uncomment when needed. */
2560 static char *pack_string (char *pkt
, char *string
);
2563 pack_string (char *pkt
, char *string
)
2568 len
= strlen (string
);
2570 len
= 200; /* Bigger than most GDB packets, junk??? */
2571 pkt
= pack_hex_byte (pkt
, len
);
2575 if ((ch
== '\0') || (ch
== '#'))
2576 ch
= '*'; /* Protect encapsulation. */
2581 #endif /* 0 (unused) */
2584 unpack_string (char *src
, char *dest
, int length
)
2593 pack_threadid (char *pkt
, threadref
*id
)
2596 unsigned char *altid
;
2598 altid
= (unsigned char *) id
;
2599 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
2601 pkt
= pack_hex_byte (pkt
, *altid
++);
2607 unpack_threadid (char *inbuf
, threadref
*id
)
2610 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
2613 altref
= (char *) id
;
2615 while (inbuf
< limit
)
2617 x
= stubhex (*inbuf
++);
2618 y
= stubhex (*inbuf
++);
2619 *altref
++ = (x
<< 4) | y
;
2624 /* Externally, threadrefs are 64 bits but internally, they are still
2625 ints. This is due to a mismatch of specifications. We would like
2626 to use 64bit thread references internally. This is an adapter
2630 int_to_threadref (threadref
*id
, int value
)
2632 unsigned char *scan
;
2634 scan
= (unsigned char *) id
;
2640 *scan
++ = (value
>> 24) & 0xff;
2641 *scan
++ = (value
>> 16) & 0xff;
2642 *scan
++ = (value
>> 8) & 0xff;
2643 *scan
++ = (value
& 0xff);
2647 threadref_to_int (threadref
*ref
)
2650 unsigned char *scan
;
2656 value
= (value
<< 8) | ((*scan
++) & 0xff);
2661 copy_threadref (threadref
*dest
, threadref
*src
)
2664 unsigned char *csrc
, *cdest
;
2666 csrc
= (unsigned char *) src
;
2667 cdest
= (unsigned char *) dest
;
2674 threadmatch (threadref
*dest
, threadref
*src
)
2676 /* Things are broken right now, so just assume we got a match. */
2678 unsigned char *srcp
, *destp
;
2680 srcp
= (char *) src
;
2681 destp
= (char *) dest
;
2685 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
2692 threadid:1, # always request threadid
2699 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2702 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
2704 *pkt
++ = 'q'; /* Info Query */
2705 *pkt
++ = 'P'; /* process or thread info */
2706 pkt
= pack_int (pkt
, mode
); /* mode */
2707 pkt
= pack_threadid (pkt
, id
); /* threadid */
2708 *pkt
= '\0'; /* terminate */
2712 /* These values tag the fields in a thread info response packet. */
2713 /* Tagging the fields allows us to request specific fields and to
2714 add more fields as time goes by. */
2716 #define TAG_THREADID 1 /* Echo the thread identifier. */
2717 #define TAG_EXISTS 2 /* Is this process defined enough to
2718 fetch registers and its stack? */
2719 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2720 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2721 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2725 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
2726 struct gdb_ext_thread_info
*info
)
2728 struct remote_state
*rs
= get_remote_state ();
2732 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
2735 /* info->threadid = 0; FIXME: implement zero_threadref. */
2737 info
->display
[0] = '\0';
2738 info
->shortname
[0] = '\0';
2739 info
->more_display
[0] = '\0';
2741 /* Assume the characters indicating the packet type have been
2743 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
2744 pkt
= unpack_threadid (pkt
, &ref
);
2747 warning (_("Incomplete response to threadinfo request."));
2748 if (!threadmatch (&ref
, expectedref
))
2749 { /* This is an answer to a different request. */
2750 warning (_("ERROR RMT Thread info mismatch."));
2753 copy_threadref (&info
->threadid
, &ref
);
2755 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2757 /* Packets are terminated with nulls. */
2758 while ((pkt
< limit
) && mask
&& *pkt
)
2760 pkt
= unpack_int (pkt
, &tag
); /* tag */
2761 pkt
= unpack_byte (pkt
, &length
); /* length */
2762 if (!(tag
& mask
)) /* Tags out of synch with mask. */
2764 warning (_("ERROR RMT: threadinfo tag mismatch."));
2768 if (tag
== TAG_THREADID
)
2772 warning (_("ERROR RMT: length of threadid is not 16."));
2776 pkt
= unpack_threadid (pkt
, &ref
);
2777 mask
= mask
& ~TAG_THREADID
;
2780 if (tag
== TAG_EXISTS
)
2782 info
->active
= stub_unpack_int (pkt
, length
);
2784 mask
= mask
& ~(TAG_EXISTS
);
2787 warning (_("ERROR RMT: 'exists' length too long."));
2793 if (tag
== TAG_THREADNAME
)
2795 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
2796 mask
= mask
& ~TAG_THREADNAME
;
2799 if (tag
== TAG_DISPLAY
)
2801 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
2802 mask
= mask
& ~TAG_DISPLAY
;
2805 if (tag
== TAG_MOREDISPLAY
)
2807 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2808 mask
= mask
& ~TAG_MOREDISPLAY
;
2811 warning (_("ERROR RMT: unknown thread info tag."));
2812 break; /* Not a tag we know about. */
2818 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2819 struct gdb_ext_thread_info
*info
)
2821 struct remote_state
*rs
= get_remote_state ();
2824 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2826 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2828 if (rs
->buf
[0] == '\0')
2831 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2836 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2839 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2840 threadref
*nextthread
)
2842 *pkt
++ = 'q'; /* info query packet */
2843 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2844 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2845 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2846 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2851 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2854 parse_threadlist_response (char *pkt
, int result_limit
,
2855 threadref
*original_echo
, threadref
*resultlist
,
2858 struct remote_state
*rs
= get_remote_state ();
2860 int count
, resultcount
, done
;
2863 /* Assume the 'q' and 'M chars have been stripped. */
2864 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2865 /* done parse past here */
2866 pkt
= unpack_byte (pkt
, &count
); /* count field */
2867 pkt
= unpack_nibble (pkt
, &done
);
2868 /* The first threadid is the argument threadid. */
2869 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2870 while ((count
-- > 0) && (pkt
< limit
))
2872 pkt
= unpack_threadid (pkt
, resultlist
++);
2873 if (resultcount
++ >= result_limit
)
2881 /* Fetch the next batch of threads from the remote. Returns -1 if the
2882 qL packet is not supported, 0 on error and 1 on success. */
2885 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2886 int *done
, int *result_count
, threadref
*threadlist
)
2888 struct remote_state
*rs
= get_remote_state ();
2891 /* Trancate result limit to be smaller than the packet size. */
2892 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
2893 >= get_remote_packet_size ())
2894 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2896 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2898 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2899 if (*rs
->buf
== '\0')
2901 /* Packet not supported. */
2906 parse_threadlist_response (rs
->buf
+ 2, result_limit
,
2907 &rs
->echo_nextthread
, threadlist
, done
);
2909 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
2911 /* FIXME: This is a good reason to drop the packet. */
2912 /* Possably, there is a duplicate response. */
2914 retransmit immediatly - race conditions
2915 retransmit after timeout - yes
2917 wait for packet, then exit
2919 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2920 return 0; /* I choose simply exiting. */
2922 if (*result_count
<= 0)
2926 warning (_("RMT ERROR : failed to get remote thread list."));
2929 return result
; /* break; */
2931 if (*result_count
> result_limit
)
2934 warning (_("RMT ERROR: threadlist response longer than requested."));
2940 /* Fetch the list of remote threads, with the qL packet, and call
2941 STEPFUNCTION for each thread found. Stops iterating and returns 1
2942 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2943 STEPFUNCTION returns false. If the packet is not supported,
2947 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2950 struct remote_state
*rs
= get_remote_state ();
2951 int done
, i
, result_count
;
2959 if (loopcount
++ > looplimit
)
2962 warning (_("Remote fetch threadlist -infinite loop-."));
2965 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
2966 MAXTHREADLISTRESULTS
,
2967 &done
, &result_count
,
2968 rs
->resultthreadlist
);
2971 /* Clear for later iterations. */
2973 /* Setup to resume next batch of thread references, set nextthread. */
2974 if (result_count
>= 1)
2975 copy_threadref (&rs
->nextthread
,
2976 &rs
->resultthreadlist
[result_count
- 1]);
2978 while (result_count
--)
2980 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
2990 /* A thread found on the remote target. */
2992 typedef struct thread_item
2994 /* The thread's PTID. */
2997 /* The thread's extra info. May be NULL. */
3000 /* The thread's name. May be NULL. */
3003 /* The core the thread was running on. -1 if not known. */
3006 /* The thread handle associated with the thread. */
3007 gdb::byte_vector
*thread_handle
;
3010 DEF_VEC_O(thread_item_t
);
3012 /* Context passed around to the various methods listing remote
3013 threads. As new threads are found, they're added to the ITEMS
3016 struct threads_listing_context
3018 /* The threads found on the remote target. */
3019 VEC (thread_item_t
) *items
;
3022 /* Discard the contents of the constructed thread listing context. */
3025 clear_threads_listing_context (void *p
)
3027 struct threads_listing_context
*context
3028 = (struct threads_listing_context
*) p
;
3030 struct thread_item
*item
;
3032 for (i
= 0; VEC_iterate (thread_item_t
, context
->items
, i
, item
); ++i
)
3034 xfree (item
->extra
);
3036 delete item
->thread_handle
;
3039 VEC_free (thread_item_t
, context
->items
);
3042 /* Remove the thread specified as the related_pid field of WS
3043 from the CONTEXT list. */
3046 threads_listing_context_remove (struct target_waitstatus
*ws
,
3047 struct threads_listing_context
*context
)
3049 struct thread_item
*item
;
3051 ptid_t child_ptid
= ws
->value
.related_pid
;
3053 for (i
= 0; VEC_iterate (thread_item_t
, context
->items
, i
, item
); ++i
)
3055 if (ptid_equal (item
->ptid
, child_ptid
))
3057 VEC_ordered_remove (thread_item_t
, context
->items
, i
);
3064 remote_newthread_step (threadref
*ref
, void *data
)
3066 struct threads_listing_context
*context
3067 = (struct threads_listing_context
*) data
;
3068 struct thread_item item
;
3069 int pid
= ptid_get_pid (inferior_ptid
);
3071 item
.ptid
= ptid_build (pid
, threadref_to_int (ref
), 0);
3075 item
.thread_handle
= nullptr;
3077 VEC_safe_push (thread_item_t
, context
->items
, &item
);
3079 return 1; /* continue iterator */
3082 #define CRAZY_MAX_THREADS 1000
3085 remote_current_thread (ptid_t oldpid
)
3087 struct remote_state
*rs
= get_remote_state ();
3090 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3091 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3096 result
= read_ptid (&rs
->buf
[2], &obuf
);
3097 if (*obuf
!= '\0' && remote_debug
)
3098 fprintf_unfiltered (gdb_stdlog
,
3099 "warning: garbage in qC reply\n");
3107 /* List remote threads using the deprecated qL packet. */
3110 remote_get_threads_with_ql (struct target_ops
*ops
,
3111 struct threads_listing_context
*context
)
3113 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3114 CRAZY_MAX_THREADS
) >= 0)
3120 #if defined(HAVE_LIBEXPAT)
3123 start_thread (struct gdb_xml_parser
*parser
,
3124 const struct gdb_xml_element
*element
,
3125 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
3127 struct threads_listing_context
*data
3128 = (struct threads_listing_context
*) user_data
;
3130 struct thread_item item
;
3132 struct gdb_xml_value
*attr
;
3134 id
= (char *) xml_find_attribute (attributes
, "id")->value
;
3135 item
.ptid
= read_ptid (id
, NULL
);
3137 attr
= xml_find_attribute (attributes
, "core");
3139 item
.core
= *(ULONGEST
*) attr
->value
;
3143 attr
= xml_find_attribute (attributes
, "name");
3144 item
.name
= attr
!= NULL
? xstrdup ((const char *) attr
->value
) : NULL
;
3146 attr
= xml_find_attribute (attributes
, "handle");
3149 item
.thread_handle
= new gdb::byte_vector
3150 (strlen ((const char *) attr
->value
) / 2);
3151 hex2bin ((const char *) attr
->value
, item
.thread_handle
->data (),
3152 item
.thread_handle
->size ());
3155 item
.thread_handle
= nullptr;
3159 VEC_safe_push (thread_item_t
, data
->items
, &item
);
3163 end_thread (struct gdb_xml_parser
*parser
,
3164 const struct gdb_xml_element
*element
,
3165 void *user_data
, const char *body_text
)
3167 struct threads_listing_context
*data
3168 = (struct threads_listing_context
*) user_data
;
3170 if (body_text
&& *body_text
)
3171 VEC_last (thread_item_t
, data
->items
)->extra
= xstrdup (body_text
);
3174 const struct gdb_xml_attribute thread_attributes
[] = {
3175 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3176 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3177 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3178 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3179 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3182 const struct gdb_xml_element thread_children
[] = {
3183 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3186 const struct gdb_xml_element threads_children
[] = {
3187 { "thread", thread_attributes
, thread_children
,
3188 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3189 start_thread
, end_thread
},
3190 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3193 const struct gdb_xml_element threads_elements
[] = {
3194 { "threads", NULL
, threads_children
,
3195 GDB_XML_EF_NONE
, NULL
, NULL
},
3196 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3201 /* List remote threads using qXfer:threads:read. */
3204 remote_get_threads_with_qxfer (struct target_ops
*ops
,
3205 struct threads_listing_context
*context
)
3207 #if defined(HAVE_LIBEXPAT)
3208 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3210 char *xml
= target_read_stralloc (ops
, TARGET_OBJECT_THREADS
, NULL
);
3211 struct cleanup
*back_to
= make_cleanup (xfree
, xml
);
3213 if (xml
!= NULL
&& *xml
!= '\0')
3215 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3216 threads_elements
, xml
, context
);
3219 do_cleanups (back_to
);
3227 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3230 remote_get_threads_with_qthreadinfo (struct target_ops
*ops
,
3231 struct threads_listing_context
*context
)
3233 struct remote_state
*rs
= get_remote_state ();
3235 if (rs
->use_threadinfo_query
)
3239 putpkt ("qfThreadInfo");
3240 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3242 if (bufp
[0] != '\0') /* q packet recognized */
3244 while (*bufp
++ == 'm') /* reply contains one or more TID */
3248 struct thread_item item
;
3250 item
.ptid
= read_ptid (bufp
, &bufp
);
3254 item
.thread_handle
= nullptr;
3256 VEC_safe_push (thread_item_t
, context
->items
, &item
);
3258 while (*bufp
++ == ','); /* comma-separated list */
3259 putpkt ("qsThreadInfo");
3260 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3267 /* Packet not recognized. */
3268 rs
->use_threadinfo_query
= 0;
3275 /* Implement the to_update_thread_list function for the remote
3279 remote_update_thread_list (struct target_ops
*ops
)
3281 struct threads_listing_context context
;
3282 struct cleanup
*old_chain
;
3285 context
.items
= NULL
;
3286 old_chain
= make_cleanup (clear_threads_listing_context
, &context
);
3288 /* We have a few different mechanisms to fetch the thread list. Try
3289 them all, starting with the most preferred one first, falling
3290 back to older methods. */
3291 if (remote_get_threads_with_qxfer (ops
, &context
)
3292 || remote_get_threads_with_qthreadinfo (ops
, &context
)
3293 || remote_get_threads_with_ql (ops
, &context
))
3296 struct thread_item
*item
;
3297 struct thread_info
*tp
, *tmp
;
3301 if (VEC_empty (thread_item_t
, context
.items
)
3302 && remote_thread_always_alive (ops
, inferior_ptid
))
3304 /* Some targets don't really support threads, but still
3305 reply an (empty) thread list in response to the thread
3306 listing packets, instead of replying "packet not
3307 supported". Exit early so we don't delete the main
3309 do_cleanups (old_chain
);
3313 /* CONTEXT now holds the current thread list on the remote
3314 target end. Delete GDB-side threads no longer found on the
3316 ALL_THREADS_SAFE (tp
, tmp
)
3319 VEC_iterate (thread_item_t
, context
.items
, i
, item
);
3322 if (ptid_equal (item
->ptid
, tp
->ptid
))
3326 if (i
== VEC_length (thread_item_t
, context
.items
))
3329 delete_thread (tp
->ptid
);
3333 /* Remove any unreported fork child threads from CONTEXT so
3334 that we don't interfere with follow fork, which is where
3335 creation of such threads is handled. */
3336 remove_new_fork_children (&context
);
3338 /* And now add threads we don't know about yet to our list. */
3340 VEC_iterate (thread_item_t
, context
.items
, i
, item
);
3343 if (!ptid_equal (item
->ptid
, null_ptid
))
3345 struct private_thread_info
*info
;
3346 /* In non-stop mode, we assume new found threads are
3347 executing until proven otherwise with a stop reply.
3348 In all-stop, we can only get here if all threads are
3350 int executing
= target_is_non_stop_p () ? 1 : 0;
3352 remote_notice_new_inferior (item
->ptid
, executing
);
3354 info
= get_private_info_ptid (item
->ptid
);
3355 info
->core
= item
->core
;
3356 info
->extra
= item
->extra
;
3358 info
->name
= item
->name
;
3360 info
->thread_handle
= item
->thread_handle
;
3361 item
->thread_handle
= nullptr;
3368 /* If no thread listing method is supported, then query whether
3369 each known thread is alive, one by one, with the T packet.
3370 If the target doesn't support threads at all, then this is a
3371 no-op. See remote_thread_alive. */
3375 do_cleanups (old_chain
);
3379 * Collect a descriptive string about the given thread.
3380 * The target may say anything it wants to about the thread
3381 * (typically info about its blocked / runnable state, name, etc.).
3382 * This string will appear in the info threads display.
3384 * Optional: targets are not required to implement this function.
3388 remote_threads_extra_info (struct target_ops
*self
, struct thread_info
*tp
)
3390 struct remote_state
*rs
= get_remote_state ();
3394 struct gdb_ext_thread_info threadinfo
;
3395 static char display_buf
[100]; /* arbitrary... */
3396 int n
= 0; /* position in display_buf */
3398 if (rs
->remote_desc
== 0) /* paranoia */
3399 internal_error (__FILE__
, __LINE__
,
3400 _("remote_threads_extra_info"));
3402 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
3403 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_lwp (tp
->ptid
) == 0))
3404 /* This is the main thread which was added by GDB. The remote
3405 server doesn't know about it. */
3408 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3410 struct thread_info
*info
= find_thread_ptid (tp
->ptid
);
3412 if (info
&& info
->priv
)
3413 return info
->priv
->extra
;
3418 if (rs
->use_threadextra_query
)
3421 char *endb
= rs
->buf
+ get_remote_packet_size ();
3423 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3425 write_ptid (b
, endb
, tp
->ptid
);
3428 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3429 if (rs
->buf
[0] != 0)
3431 n
= std::min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
3432 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
3433 display_buf
[result
] = '\0';
3438 /* If the above query fails, fall back to the old method. */
3439 rs
->use_threadextra_query
= 0;
3440 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3441 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3442 int_to_threadref (&id
, ptid_get_lwp (tp
->ptid
));
3443 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3444 if (threadinfo
.active
)
3446 if (*threadinfo
.shortname
)
3447 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
3448 " Name: %s,", threadinfo
.shortname
);
3449 if (*threadinfo
.display
)
3450 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3451 " State: %s,", threadinfo
.display
);
3452 if (*threadinfo
.more_display
)
3453 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3454 " Priority: %s", threadinfo
.more_display
);
3458 /* For purely cosmetic reasons, clear up trailing commas. */
3459 if (',' == display_buf
[n
-1])
3460 display_buf
[n
-1] = ' ';
3469 remote_static_tracepoint_marker_at (struct target_ops
*self
, CORE_ADDR addr
,
3470 struct static_tracepoint_marker
*marker
)
3472 struct remote_state
*rs
= get_remote_state ();
3475 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3477 p
+= hexnumstr (p
, addr
);
3479 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3483 error (_("Remote failure reply: %s"), p
);
3487 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
3494 static VEC(static_tracepoint_marker_p
) *
3495 remote_static_tracepoint_markers_by_strid (struct target_ops
*self
,
3498 struct remote_state
*rs
= get_remote_state ();
3499 VEC(static_tracepoint_marker_p
) *markers
= NULL
;
3500 struct static_tracepoint_marker
*marker
= NULL
;
3501 struct cleanup
*old_chain
;
3504 /* Ask for a first packet of static tracepoint marker
3507 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3510 error (_("Remote failure reply: %s"), p
);
3512 old_chain
= make_cleanup (free_current_marker
, &marker
);
3517 marker
= XCNEW (struct static_tracepoint_marker
);
3521 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
3523 if (strid
== NULL
|| strcmp (strid
, marker
->str_id
) == 0)
3525 VEC_safe_push (static_tracepoint_marker_p
,
3531 release_static_tracepoint_marker (marker
);
3532 memset (marker
, 0, sizeof (*marker
));
3535 while (*p
++ == ','); /* comma-separated list */
3536 /* Ask for another packet of static tracepoint definition. */
3538 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3542 do_cleanups (old_chain
);
3547 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3550 remote_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long thread
)
3552 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, 0);
3556 /* Restart the remote side; this is an extended protocol operation. */
3559 extended_remote_restart (void)
3561 struct remote_state
*rs
= get_remote_state ();
3563 /* Send the restart command; for reasons I don't understand the
3564 remote side really expects a number after the "R". */
3565 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
3568 remote_fileio_reset ();
3571 /* Clean up connection to a remote debugger. */
3574 remote_close (struct target_ops
*self
)
3576 struct remote_state
*rs
= get_remote_state ();
3578 if (rs
->remote_desc
== NULL
)
3579 return; /* already closed */
3581 /* Make sure we leave stdin registered in the event loop. */
3582 remote_terminal_ours (self
);
3584 serial_close (rs
->remote_desc
);
3585 rs
->remote_desc
= NULL
;
3587 /* We don't have a connection to the remote stub anymore. Get rid
3588 of all the inferiors and their threads we were controlling.
3589 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3590 will be unable to find the thread corresponding to (pid, 0, 0). */
3591 inferior_ptid
= null_ptid
;
3592 discard_all_inferiors ();
3594 /* We are closing the remote target, so we should discard
3595 everything of this target. */
3596 discard_pending_stop_replies_in_queue (rs
);
3598 if (remote_async_inferior_event_token
)
3599 delete_async_event_handler (&remote_async_inferior_event_token
);
3601 remote_notif_state_xfree (rs
->notif_state
);
3603 trace_reset_local_state ();
3606 /* Query the remote side for the text, data and bss offsets. */
3611 struct remote_state
*rs
= get_remote_state ();
3614 int lose
, num_segments
= 0, do_sections
, do_segments
;
3615 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
3616 struct section_offsets
*offs
;
3617 struct symfile_segment_data
*data
;
3619 if (symfile_objfile
== NULL
)
3622 putpkt ("qOffsets");
3623 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3626 if (buf
[0] == '\000')
3627 return; /* Return silently. Stub doesn't support
3631 warning (_("Remote failure reply: %s"), buf
);
3635 /* Pick up each field in turn. This used to be done with scanf, but
3636 scanf will make trouble if CORE_ADDR size doesn't match
3637 conversion directives correctly. The following code will work
3638 with any size of CORE_ADDR. */
3639 text_addr
= data_addr
= bss_addr
= 0;
3643 if (startswith (ptr
, "Text="))
3646 /* Don't use strtol, could lose on big values. */
3647 while (*ptr
&& *ptr
!= ';')
3648 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3650 if (startswith (ptr
, ";Data="))
3653 while (*ptr
&& *ptr
!= ';')
3654 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3659 if (!lose
&& startswith (ptr
, ";Bss="))
3662 while (*ptr
&& *ptr
!= ';')
3663 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
3665 if (bss_addr
!= data_addr
)
3666 warning (_("Target reported unsupported offsets: %s"), buf
);
3671 else if (startswith (ptr
, "TextSeg="))
3674 /* Don't use strtol, could lose on big values. */
3675 while (*ptr
&& *ptr
!= ';')
3676 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3679 if (startswith (ptr
, ";DataSeg="))
3682 while (*ptr
&& *ptr
!= ';')
3683 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3691 error (_("Malformed response to offset query, %s"), buf
);
3692 else if (*ptr
!= '\0')
3693 warning (_("Target reported unsupported offsets: %s"), buf
);
3695 offs
= ((struct section_offsets
*)
3696 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
3697 memcpy (offs
, symfile_objfile
->section_offsets
,
3698 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
3700 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
3701 do_segments
= (data
!= NULL
);
3702 do_sections
= num_segments
== 0;
3704 if (num_segments
> 0)
3706 segments
[0] = text_addr
;
3707 segments
[1] = data_addr
;
3709 /* If we have two segments, we can still try to relocate everything
3710 by assuming that the .text and .data offsets apply to the whole
3711 text and data segments. Convert the offsets given in the packet
3712 to base addresses for symfile_map_offsets_to_segments. */
3713 else if (data
&& data
->num_segments
== 2)
3715 segments
[0] = data
->segment_bases
[0] + text_addr
;
3716 segments
[1] = data
->segment_bases
[1] + data_addr
;
3719 /* If the object file has only one segment, assume that it is text
3720 rather than data; main programs with no writable data are rare,
3721 but programs with no code are useless. Of course the code might
3722 have ended up in the data segment... to detect that we would need
3723 the permissions here. */
3724 else if (data
&& data
->num_segments
== 1)
3726 segments
[0] = data
->segment_bases
[0] + text_addr
;
3729 /* There's no way to relocate by segment. */
3735 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
3736 offs
, num_segments
, segments
);
3738 if (ret
== 0 && !do_sections
)
3739 error (_("Can not handle qOffsets TextSeg "
3740 "response with this symbol file"));
3747 free_symfile_segment_data (data
);
3751 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
3753 /* This is a temporary kludge to force data and bss to use the
3754 same offsets because that's what nlmconv does now. The real
3755 solution requires changes to the stub and remote.c that I
3756 don't have time to do right now. */
3758 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
3759 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
3762 objfile_relocate (symfile_objfile
, offs
);
3765 /* Send interrupt_sequence to remote target. */
3767 send_interrupt_sequence (void)
3769 struct remote_state
*rs
= get_remote_state ();
3771 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3772 remote_serial_write ("\x03", 1);
3773 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3774 serial_send_break (rs
->remote_desc
);
3775 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3777 serial_send_break (rs
->remote_desc
);
3778 remote_serial_write ("g", 1);
3781 internal_error (__FILE__
, __LINE__
,
3782 _("Invalid value for interrupt_sequence_mode: %s."),
3783 interrupt_sequence_mode
);
3787 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3788 and extract the PTID. Returns NULL_PTID if not found. */
3791 stop_reply_extract_thread (char *stop_reply
)
3793 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
3797 /* Txx r:val ; r:val (...) */
3800 /* Look for "register" named "thread". */
3805 p1
= strchr (p
, ':');
3809 if (strncmp (p
, "thread", p1
- p
) == 0)
3810 return read_ptid (++p1
, &p
);
3812 p1
= strchr (p
, ';');
3824 /* Determine the remote side's current thread. If we have a stop
3825 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3826 "thread" register we can extract the current thread from. If not,
3827 ask the remote which is the current thread with qC. The former
3828 method avoids a roundtrip. */
3831 get_current_thread (char *wait_status
)
3833 ptid_t ptid
= null_ptid
;
3835 /* Note we don't use remote_parse_stop_reply as that makes use of
3836 the target architecture, which we haven't yet fully determined at
3838 if (wait_status
!= NULL
)
3839 ptid
= stop_reply_extract_thread (wait_status
);
3840 if (ptid_equal (ptid
, null_ptid
))
3841 ptid
= remote_current_thread (inferior_ptid
);
3846 /* Query the remote target for which is the current thread/process,
3847 add it to our tables, and update INFERIOR_PTID. The caller is
3848 responsible for setting the state such that the remote end is ready
3849 to return the current thread.
3851 This function is called after handling the '?' or 'vRun' packets,
3852 whose response is a stop reply from which we can also try
3853 extracting the thread. If the target doesn't support the explicit
3854 qC query, we infer the current thread from that stop reply, passed
3855 in in WAIT_STATUS, which may be NULL. */
3858 add_current_inferior_and_thread (char *wait_status
)
3860 struct remote_state
*rs
= get_remote_state ();
3863 inferior_ptid
= null_ptid
;
3865 /* Now, if we have thread information, update inferior_ptid. */
3866 ptid_t curr_ptid
= get_current_thread (wait_status
);
3868 if (curr_ptid
!= null_ptid
)
3870 if (!remote_multi_process_p (rs
))
3875 /* Without this, some commands which require an active target
3876 (such as kill) won't work. This variable serves (at least)
3877 double duty as both the pid of the target process (if it has
3878 such), and as a flag indicating that a target is active. */
3879 curr_ptid
= magic_null_ptid
;
3883 remote_add_inferior (fake_pid_p
, ptid_get_pid (curr_ptid
), -1, 1);
3885 /* Add the main thread and switch to it. Don't try reading
3886 registers yet, since we haven't fetched the target description
3888 thread_info
*tp
= add_thread_silent (curr_ptid
);
3889 switch_to_thread_no_regs (tp
);
3892 /* Print info about a thread that was found already stopped on
3896 print_one_stopped_thread (struct thread_info
*thread
)
3898 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
3900 switch_to_thread (thread
->ptid
);
3901 stop_pc
= get_frame_pc (get_current_frame ());
3902 set_current_sal_from_frame (get_current_frame ());
3904 thread
->suspend
.waitstatus_pending_p
= 0;
3906 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
3908 enum gdb_signal sig
= ws
->value
.sig
;
3910 if (signal_print_state (sig
))
3911 observer_notify_signal_received (sig
);
3913 observer_notify_normal_stop (NULL
, 1);
3916 /* Process all initial stop replies the remote side sent in response
3917 to the ? packet. These indicate threads that were already stopped
3918 on initial connection. We mark these threads as stopped and print
3919 their current frame before giving the user the prompt. */
3922 process_initial_stop_replies (int from_tty
)
3924 int pending_stop_replies
= stop_reply_queue_length ();
3925 struct inferior
*inf
;
3926 struct thread_info
*thread
;
3927 struct thread_info
*selected
= NULL
;
3928 struct thread_info
*lowest_stopped
= NULL
;
3929 struct thread_info
*first
= NULL
;
3931 /* Consume the initial pending events. */
3932 while (pending_stop_replies
-- > 0)
3934 ptid_t waiton_ptid
= minus_one_ptid
;
3936 struct target_waitstatus ws
;
3937 int ignore_event
= 0;
3938 struct thread_info
*thread
;
3940 memset (&ws
, 0, sizeof (ws
));
3941 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
3943 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
3947 case TARGET_WAITKIND_IGNORE
:
3948 case TARGET_WAITKIND_NO_RESUMED
:
3949 case TARGET_WAITKIND_SIGNALLED
:
3950 case TARGET_WAITKIND_EXITED
:
3951 /* We shouldn't see these, but if we do, just ignore. */
3953 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
3957 case TARGET_WAITKIND_EXECD
:
3958 xfree (ws
.value
.execd_pathname
);
3967 thread
= find_thread_ptid (event_ptid
);
3969 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
3971 enum gdb_signal sig
= ws
.value
.sig
;
3973 /* Stubs traditionally report SIGTRAP as initial signal,
3974 instead of signal 0. Suppress it. */
3975 if (sig
== GDB_SIGNAL_TRAP
)
3977 thread
->suspend
.stop_signal
= sig
;
3981 thread
->suspend
.waitstatus
= ws
;
3983 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
3984 || ws
.value
.sig
!= GDB_SIGNAL_0
)
3985 thread
->suspend
.waitstatus_pending_p
= 1;
3987 set_executing (event_ptid
, 0);
3988 set_running (event_ptid
, 0);
3989 thread
->priv
->vcont_resumed
= 0;
3992 /* "Notice" the new inferiors before anything related to
3993 registers/memory. */
3999 inf
->needs_setup
= 1;
4003 thread
= any_live_thread_of_process (inf
->pid
);
4004 notice_new_inferior (thread
->ptid
,
4005 thread
->state
== THREAD_RUNNING
,
4010 /* If all-stop on top of non-stop, pause all threads. Note this
4011 records the threads' stop pc, so must be done after "noticing"
4015 stop_all_threads ();
4017 /* If all threads of an inferior were already stopped, we
4018 haven't setup the inferior yet. */
4024 if (inf
->needs_setup
)
4026 thread
= any_live_thread_of_process (inf
->pid
);
4027 switch_to_thread_no_regs (thread
);
4033 /* Now go over all threads that are stopped, and print their current
4034 frame. If all-stop, then if there's a signalled thread, pick
4036 ALL_NON_EXITED_THREADS (thread
)
4042 set_running (thread
->ptid
, 0);
4043 else if (thread
->state
!= THREAD_STOPPED
)
4046 if (selected
== NULL
4047 && thread
->suspend
.waitstatus_pending_p
)
4050 if (lowest_stopped
== NULL
4051 || thread
->inf
->num
< lowest_stopped
->inf
->num
4052 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4053 lowest_stopped
= thread
;
4056 print_one_stopped_thread (thread
);
4059 /* In all-stop, we only print the status of one thread, and leave
4060 others with their status pending. */
4065 thread
= lowest_stopped
;
4069 print_one_stopped_thread (thread
);
4072 /* For "info program". */
4073 thread
= inferior_thread ();
4074 if (thread
->state
== THREAD_STOPPED
)
4075 set_last_target_status (inferior_ptid
, thread
->suspend
.waitstatus
);
4078 /* Start the remote connection and sync state. */
4081 remote_start_remote (int from_tty
, struct target_ops
*target
, int extended_p
)
4083 struct remote_state
*rs
= get_remote_state ();
4084 struct packet_config
*noack_config
;
4085 char *wait_status
= NULL
;
4087 /* Signal other parts that we're going through the initial setup,
4088 and so things may not be stable yet. E.g., we don't try to
4089 install tracepoints until we've relocated symbols. Also, a
4090 Ctrl-C before we're connected and synced up can't interrupt the
4091 target. Instead, it offers to drop the (potentially wedged)
4093 rs
->starting_up
= 1;
4097 if (interrupt_on_connect
)
4098 send_interrupt_sequence ();
4100 /* Ack any packet which the remote side has already sent. */
4101 remote_serial_write ("+", 1);
4103 /* The first packet we send to the target is the optional "supported
4104 packets" request. If the target can answer this, it will tell us
4105 which later probes to skip. */
4106 remote_query_supported ();
4108 /* If the stub wants to get a QAllow, compose one and send it. */
4109 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4110 remote_set_permissions (target
);
4112 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4113 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4114 as a reply to known packet. For packet "vFile:setfs:" it is an
4115 invalid reply and GDB would return error in
4116 remote_hostio_set_filesystem, making remote files access impossible.
4117 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4118 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4120 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4122 putpkt (v_mustreplyempty
);
4123 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4124 if (strcmp (rs
->buf
, "OK") == 0)
4125 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4126 else if (strcmp (rs
->buf
, "") != 0)
4127 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4131 /* Next, we possibly activate noack mode.
4133 If the QStartNoAckMode packet configuration is set to AUTO,
4134 enable noack mode if the stub reported a wish for it with
4137 If set to TRUE, then enable noack mode even if the stub didn't
4138 report it in qSupported. If the stub doesn't reply OK, the
4139 session ends with an error.
4141 If FALSE, then don't activate noack mode, regardless of what the
4142 stub claimed should be the default with qSupported. */
4144 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4145 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4147 putpkt ("QStartNoAckMode");
4148 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4149 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4155 /* Tell the remote that we are using the extended protocol. */
4157 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4160 /* Let the target know which signals it is allowed to pass down to
4162 update_signals_program_target ();
4164 /* Next, if the target can specify a description, read it. We do
4165 this before anything involving memory or registers. */
4166 target_find_description ();
4168 /* Next, now that we know something about the target, update the
4169 address spaces in the program spaces. */
4170 update_address_spaces ();
4172 /* On OSs where the list of libraries is global to all
4173 processes, we fetch them early. */
4174 if (gdbarch_has_global_solist (target_gdbarch ()))
4175 solib_add (NULL
, from_tty
, auto_solib_add
);
4177 if (target_is_non_stop_p ())
4179 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4180 error (_("Non-stop mode requested, but remote "
4181 "does not support non-stop"));
4183 putpkt ("QNonStop:1");
4184 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4186 if (strcmp (rs
->buf
, "OK") != 0)
4187 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
4189 /* Find about threads and processes the stub is already
4190 controlling. We default to adding them in the running state.
4191 The '?' query below will then tell us about which threads are
4193 remote_update_thread_list (target
);
4195 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4197 /* Don't assume that the stub can operate in all-stop mode.
4198 Request it explicitly. */
4199 putpkt ("QNonStop:0");
4200 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4202 if (strcmp (rs
->buf
, "OK") != 0)
4203 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
4206 /* Upload TSVs regardless of whether the target is running or not. The
4207 remote stub, such as GDBserver, may have some predefined or builtin
4208 TSVs, even if the target is not running. */
4209 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4211 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4213 remote_upload_trace_state_variables (target
, &uploaded_tsvs
);
4214 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4217 /* Check whether the target is running now. */
4219 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4221 if (!target_is_non_stop_p ())
4223 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4226 error (_("The target is not running (try extended-remote?)"));
4228 /* We're connected, but not running. Drop out before we
4229 call start_remote. */
4230 rs
->starting_up
= 0;
4235 /* Save the reply for later. */
4236 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
4237 strcpy (wait_status
, rs
->buf
);
4240 /* Fetch thread list. */
4241 target_update_thread_list ();
4243 /* Let the stub know that we want it to return the thread. */
4244 set_continue_thread (minus_one_ptid
);
4246 if (thread_count () == 0)
4248 /* Target has no concept of threads at all. GDB treats
4249 non-threaded target as single-threaded; add a main
4251 add_current_inferior_and_thread (wait_status
);
4255 /* We have thread information; select the thread the target
4256 says should be current. If we're reconnecting to a
4257 multi-threaded program, this will ideally be the thread
4258 that last reported an event before GDB disconnected. */
4259 inferior_ptid
= get_current_thread (wait_status
);
4260 if (ptid_equal (inferior_ptid
, null_ptid
))
4262 /* Odd... The target was able to list threads, but not
4263 tell us which thread was current (no "thread"
4264 register in T stop reply?). Just pick the first
4265 thread in the thread list then. */
4268 fprintf_unfiltered (gdb_stdlog
,
4269 "warning: couldn't determine remote "
4270 "current thread; picking first in list.\n");
4272 inferior_ptid
= thread_list
->ptid
;
4276 /* init_wait_for_inferior should be called before get_offsets in order
4277 to manage `inserted' flag in bp loc in a correct state.
4278 breakpoint_init_inferior, called from init_wait_for_inferior, set
4279 `inserted' flag to 0, while before breakpoint_re_set, called from
4280 start_remote, set `inserted' flag to 1. In the initialization of
4281 inferior, breakpoint_init_inferior should be called first, and then
4282 breakpoint_re_set can be called. If this order is broken, state of
4283 `inserted' flag is wrong, and cause some problems on breakpoint
4285 init_wait_for_inferior ();
4287 get_offsets (); /* Get text, data & bss offsets. */
4289 /* If we could not find a description using qXfer, and we know
4290 how to do it some other way, try again. This is not
4291 supported for non-stop; it could be, but it is tricky if
4292 there are no stopped threads when we connect. */
4293 if (remote_read_description_p (target
)
4294 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4296 target_clear_description ();
4297 target_find_description ();
4300 /* Use the previously fetched status. */
4301 gdb_assert (wait_status
!= NULL
);
4302 strcpy (rs
->buf
, wait_status
);
4303 rs
->cached_wait_status
= 1;
4305 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4309 /* Clear WFI global state. Do this before finding about new
4310 threads and inferiors, and setting the current inferior.
4311 Otherwise we would clear the proceed status of the current
4312 inferior when we want its stop_soon state to be preserved
4313 (see notice_new_inferior). */
4314 init_wait_for_inferior ();
4316 /* In non-stop, we will either get an "OK", meaning that there
4317 are no stopped threads at this time; or, a regular stop
4318 reply. In the latter case, there may be more than one thread
4319 stopped --- we pull them all out using the vStopped
4321 if (strcmp (rs
->buf
, "OK") != 0)
4323 struct notif_client
*notif
= ¬if_client_stop
;
4325 /* remote_notif_get_pending_replies acks this one, and gets
4327 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4328 = remote_notif_parse (notif
, rs
->buf
);
4329 remote_notif_get_pending_events (notif
);
4332 if (thread_count () == 0)
4335 error (_("The target is not running (try extended-remote?)"));
4337 /* We're connected, but not running. Drop out before we
4338 call start_remote. */
4339 rs
->starting_up
= 0;
4343 /* In non-stop mode, any cached wait status will be stored in
4344 the stop reply queue. */
4345 gdb_assert (wait_status
== NULL
);
4347 /* Report all signals during attach/startup. */
4348 remote_pass_signals (target
, 0, NULL
);
4350 /* If there are already stopped threads, mark them stopped and
4351 report their stops before giving the prompt to the user. */
4352 process_initial_stop_replies (from_tty
);
4354 if (target_can_async_p ())
4358 /* If we connected to a live target, do some additional setup. */
4359 if (target_has_execution
)
4361 if (symfile_objfile
) /* No use without a symbol-file. */
4362 remote_check_symbols ();
4365 /* Possibly the target has been engaged in a trace run started
4366 previously; find out where things are at. */
4367 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4369 struct uploaded_tp
*uploaded_tps
= NULL
;
4371 if (current_trace_status ()->running
)
4372 printf_filtered (_("Trace is already running on the target.\n"));
4374 remote_upload_tracepoints (target
, &uploaded_tps
);
4376 merge_uploaded_tracepoints (&uploaded_tps
);
4379 /* Possibly the target has been engaged in a btrace record started
4380 previously; find out where things are at. */
4381 remote_btrace_maybe_reopen ();
4383 /* The thread and inferior lists are now synchronized with the
4384 target, our symbols have been relocated, and we're merged the
4385 target's tracepoints with ours. We're done with basic start
4387 rs
->starting_up
= 0;
4389 /* Maybe breakpoints are global and need to be inserted now. */
4390 if (breakpoints_should_be_inserted_now ())
4391 insert_breakpoints ();
4394 /* Open a connection to a remote debugger.
4395 NAME is the filename used for communication. */
4398 remote_open (const char *name
, int from_tty
)
4400 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
4403 /* Open a connection to a remote debugger using the extended
4404 remote gdb protocol. NAME is the filename used for communication. */
4407 extended_remote_open (const char *name
, int from_tty
)
4409 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
4412 /* Reset all packets back to "unknown support". Called when opening a
4413 new connection to a remote target. */
4416 reset_all_packet_configs_support (void)
4420 for (i
= 0; i
< PACKET_MAX
; i
++)
4421 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4424 /* Initialize all packet configs. */
4427 init_all_packet_configs (void)
4431 for (i
= 0; i
< PACKET_MAX
; i
++)
4433 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4434 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4438 /* Symbol look-up. */
4441 remote_check_symbols (void)
4443 struct remote_state
*rs
= get_remote_state ();
4444 char *msg
, *reply
, *tmp
;
4447 struct cleanup
*old_chain
;
4449 /* The remote side has no concept of inferiors that aren't running
4450 yet, it only knows about running processes. If we're connected
4451 but our current inferior is not running, we should not invite the
4452 remote target to request symbol lookups related to its
4453 (unrelated) current process. */
4454 if (!target_has_execution
)
4457 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4460 /* Make sure the remote is pointing at the right process. Note
4461 there's no way to select "no process". */
4462 set_general_process ();
4464 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4465 because we need both at the same time. */
4466 msg
= (char *) xmalloc (get_remote_packet_size ());
4467 old_chain
= make_cleanup (xfree
, msg
);
4468 reply
= (char *) xmalloc (get_remote_packet_size ());
4469 make_cleanup (free_current_contents
, &reply
);
4470 reply_size
= get_remote_packet_size ();
4472 /* Invite target to request symbol lookups. */
4474 putpkt ("qSymbol::");
4475 getpkt (&reply
, &reply_size
, 0);
4476 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4478 while (startswith (reply
, "qSymbol:"))
4480 struct bound_minimal_symbol sym
;
4483 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
4485 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
4486 if (sym
.minsym
== NULL
)
4487 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
4490 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4491 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4493 /* If this is a function address, return the start of code
4494 instead of any data function descriptor. */
4495 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4499 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
4500 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4504 getpkt (&reply
, &reply_size
, 0);
4507 do_cleanups (old_chain
);
4510 static struct serial
*
4511 remote_serial_open (const char *name
)
4513 static int udp_warning
= 0;
4515 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4516 of in ser-tcp.c, because it is the remote protocol assuming that the
4517 serial connection is reliable and not the serial connection promising
4519 if (!udp_warning
&& startswith (name
, "udp:"))
4521 warning (_("The remote protocol may be unreliable over UDP.\n"
4522 "Some events may be lost, rendering further debugging "
4527 return serial_open (name
);
4530 /* Inform the target of our permission settings. The permission flags
4531 work without this, but if the target knows the settings, it can do
4532 a couple things. First, it can add its own check, to catch cases
4533 that somehow manage to get by the permissions checks in target
4534 methods. Second, if the target is wired to disallow particular
4535 settings (for instance, a system in the field that is not set up to
4536 be able to stop at a breakpoint), it can object to any unavailable
4540 remote_set_permissions (struct target_ops
*self
)
4542 struct remote_state
*rs
= get_remote_state ();
4544 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAllow:"
4545 "WriteReg:%x;WriteMem:%x;"
4546 "InsertBreak:%x;InsertTrace:%x;"
4547 "InsertFastTrace:%x;Stop:%x",
4548 may_write_registers
, may_write_memory
,
4549 may_insert_breakpoints
, may_insert_tracepoints
,
4550 may_insert_fast_tracepoints
, may_stop
);
4552 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4554 /* If the target didn't like the packet, warn the user. Do not try
4555 to undo the user's settings, that would just be maddening. */
4556 if (strcmp (rs
->buf
, "OK") != 0)
4557 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
4560 /* This type describes each known response to the qSupported
4562 struct protocol_feature
4564 /* The name of this protocol feature. */
4567 /* The default for this protocol feature. */
4568 enum packet_support default_support
;
4570 /* The function to call when this feature is reported, or after
4571 qSupported processing if the feature is not supported.
4572 The first argument points to this structure. The second
4573 argument indicates whether the packet requested support be
4574 enabled, disabled, or probed (or the default, if this function
4575 is being called at the end of processing and this feature was
4576 not reported). The third argument may be NULL; if not NULL, it
4577 is a NUL-terminated string taken from the packet following
4578 this feature's name and an equals sign. */
4579 void (*func
) (const struct protocol_feature
*, enum packet_support
,
4582 /* The corresponding packet for this feature. Only used if
4583 FUNC is remote_supported_packet. */
4588 remote_supported_packet (const struct protocol_feature
*feature
,
4589 enum packet_support support
,
4590 const char *argument
)
4594 warning (_("Remote qSupported response supplied an unexpected value for"
4595 " \"%s\"."), feature
->name
);
4599 remote_protocol_packets
[feature
->packet
].support
= support
;
4603 remote_packet_size (const struct protocol_feature
*feature
,
4604 enum packet_support support
, const char *value
)
4606 struct remote_state
*rs
= get_remote_state ();
4611 if (support
!= PACKET_ENABLE
)
4614 if (value
== NULL
|| *value
== '\0')
4616 warning (_("Remote target reported \"%s\" without a size."),
4622 packet_size
= strtol (value
, &value_end
, 16);
4623 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
4625 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4626 feature
->name
, value
);
4630 /* Record the new maximum packet size. */
4631 rs
->explicit_packet_size
= packet_size
;
4634 static const struct protocol_feature remote_protocol_features
[] = {
4635 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
4636 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
4637 PACKET_qXfer_auxv
},
4638 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
4639 PACKET_qXfer_exec_file
},
4640 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
4641 PACKET_qXfer_features
},
4642 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
4643 PACKET_qXfer_libraries
},
4644 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
4645 PACKET_qXfer_libraries_svr4
},
4646 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
4647 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
4648 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
4649 PACKET_qXfer_memory_map
},
4650 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
4651 PACKET_qXfer_spu_read
},
4652 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
4653 PACKET_qXfer_spu_write
},
4654 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
4655 PACKET_qXfer_osdata
},
4656 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
4657 PACKET_qXfer_threads
},
4658 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
4659 PACKET_qXfer_traceframe_info
},
4660 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
4661 PACKET_QPassSignals
},
4662 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
4663 PACKET_QCatchSyscalls
},
4664 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
4665 PACKET_QProgramSignals
},
4666 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
4667 PACKET_QSetWorkingDir
},
4668 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
4669 PACKET_QStartupWithShell
},
4670 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
4671 PACKET_QEnvironmentHexEncoded
},
4672 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
4673 PACKET_QEnvironmentReset
},
4674 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
4675 PACKET_QEnvironmentUnset
},
4676 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
4677 PACKET_QStartNoAckMode
},
4678 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
4679 PACKET_multiprocess_feature
},
4680 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
4681 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
4682 PACKET_qXfer_siginfo_read
},
4683 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
4684 PACKET_qXfer_siginfo_write
},
4685 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4686 PACKET_ConditionalTracepoints
},
4687 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
4688 PACKET_ConditionalBreakpoints
},
4689 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
4690 PACKET_BreakpointCommands
},
4691 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4692 PACKET_FastTracepoints
},
4693 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4694 PACKET_StaticTracepoints
},
4695 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
4696 PACKET_InstallInTrace
},
4697 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
4698 PACKET_DisconnectedTracing_feature
},
4699 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
4701 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
4703 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
4704 PACKET_TracepointSource
},
4705 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
4707 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4708 PACKET_EnableDisableTracepoints_feature
},
4709 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
4710 PACKET_qXfer_fdpic
},
4711 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
4713 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
4714 PACKET_QDisableRandomization
},
4715 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
4716 { "QTBuffer:size", PACKET_DISABLE
,
4717 remote_supported_packet
, PACKET_QTBuffer_size
},
4718 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
4719 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
4720 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
4721 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
4722 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
4723 PACKET_qXfer_btrace
},
4724 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
4725 PACKET_qXfer_btrace_conf
},
4726 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
4727 PACKET_Qbtrace_conf_bts_size
},
4728 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
4729 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
4730 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
4731 PACKET_fork_event_feature
},
4732 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
4733 PACKET_vfork_event_feature
},
4734 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
4735 PACKET_exec_event_feature
},
4736 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
4737 PACKET_Qbtrace_conf_pt_size
},
4738 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
4739 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
4740 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
4743 static char *remote_support_xml
;
4745 /* Register string appended to "xmlRegisters=" in qSupported query. */
4748 register_remote_support_xml (const char *xml
)
4750 #if defined(HAVE_LIBEXPAT)
4751 if (remote_support_xml
== NULL
)
4752 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
4755 char *copy
= xstrdup (remote_support_xml
+ 13);
4756 char *p
= strtok (copy
, ",");
4760 if (strcmp (p
, xml
) == 0)
4767 while ((p
= strtok (NULL
, ",")) != NULL
);
4770 remote_support_xml
= reconcat (remote_support_xml
,
4771 remote_support_xml
, ",", xml
,
4778 remote_query_supported_append (char *msg
, const char *append
)
4781 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
4783 return xstrdup (append
);
4787 remote_query_supported (void)
4789 struct remote_state
*rs
= get_remote_state ();
4792 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
4794 /* The packet support flags are handled differently for this packet
4795 than for most others. We treat an error, a disabled packet, and
4796 an empty response identically: any features which must be reported
4797 to be used will be automatically disabled. An empty buffer
4798 accomplishes this, since that is also the representation for a list
4799 containing no features. */
4802 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
4805 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
4807 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
4808 q
= remote_query_supported_append (q
, "multiprocess+");
4810 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4811 q
= remote_query_supported_append (q
, "swbreak+");
4812 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4813 q
= remote_query_supported_append (q
, "hwbreak+");
4815 q
= remote_query_supported_append (q
, "qRelocInsn+");
4817 if (packet_set_cmd_state (PACKET_fork_event_feature
)
4818 != AUTO_BOOLEAN_FALSE
)
4819 q
= remote_query_supported_append (q
, "fork-events+");
4820 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
4821 != AUTO_BOOLEAN_FALSE
)
4822 q
= remote_query_supported_append (q
, "vfork-events+");
4823 if (packet_set_cmd_state (PACKET_exec_event_feature
)
4824 != AUTO_BOOLEAN_FALSE
)
4825 q
= remote_query_supported_append (q
, "exec-events+");
4827 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
4828 q
= remote_query_supported_append (q
, "vContSupported+");
4830 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
4831 q
= remote_query_supported_append (q
, "QThreadEvents+");
4833 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
4834 q
= remote_query_supported_append (q
, "no-resumed+");
4836 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4837 the qSupported:xmlRegisters=i386 handling. */
4838 if (remote_support_xml
!= NULL
)
4839 q
= remote_query_supported_append (q
, remote_support_xml
);
4841 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
4844 do_cleanups (old_chain
);
4846 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4848 /* If an error occured, warn, but do not return - just reset the
4849 buffer to empty and go on to disable features. */
4850 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
4853 warning (_("Remote failure reply: %s"), rs
->buf
);
4858 memset (seen
, 0, sizeof (seen
));
4863 enum packet_support is_supported
;
4864 char *p
, *end
, *name_end
, *value
;
4866 /* First separate out this item from the rest of the packet. If
4867 there's another item after this, we overwrite the separator
4868 (terminated strings are much easier to work with). */
4870 end
= strchr (p
, ';');
4873 end
= p
+ strlen (p
);
4883 warning (_("empty item in \"qSupported\" response"));
4888 name_end
= strchr (p
, '=');
4891 /* This is a name=value entry. */
4892 is_supported
= PACKET_ENABLE
;
4893 value
= name_end
+ 1;
4902 is_supported
= PACKET_ENABLE
;
4906 is_supported
= PACKET_DISABLE
;
4910 is_supported
= PACKET_SUPPORT_UNKNOWN
;
4914 warning (_("unrecognized item \"%s\" "
4915 "in \"qSupported\" response"), p
);
4921 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4922 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
4924 const struct protocol_feature
*feature
;
4927 feature
= &remote_protocol_features
[i
];
4928 feature
->func (feature
, is_supported
, value
);
4933 /* If we increased the packet size, make sure to increase the global
4934 buffer size also. We delay this until after parsing the entire
4935 qSupported packet, because this is the same buffer we were
4937 if (rs
->buf_size
< rs
->explicit_packet_size
)
4939 rs
->buf_size
= rs
->explicit_packet_size
;
4940 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
4943 /* Handle the defaults for unmentioned features. */
4944 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4947 const struct protocol_feature
*feature
;
4949 feature
= &remote_protocol_features
[i
];
4950 feature
->func (feature
, feature
->default_support
, NULL
);
4954 /* Serial QUIT handler for the remote serial descriptor.
4956 Defers handling a Ctrl-C until we're done with the current
4957 command/response packet sequence, unless:
4959 - We're setting up the connection. Don't send a remote interrupt
4960 request, as we're not fully synced yet. Quit immediately
4963 - The target has been resumed in the foreground
4964 (target_terminal::is_ours is false) with a synchronous resume
4965 packet, and we're blocked waiting for the stop reply, thus a
4966 Ctrl-C should be immediately sent to the target.
4968 - We get a second Ctrl-C while still within the same serial read or
4969 write. In that case the serial is seemingly wedged --- offer to
4972 - We see a second Ctrl-C without target response, after having
4973 previously interrupted the target. In that case the target/stub
4974 is probably wedged --- offer to quit/disconnect.
4978 remote_serial_quit_handler (void)
4980 struct remote_state
*rs
= get_remote_state ();
4982 if (check_quit_flag ())
4984 /* If we're starting up, we're not fully synced yet. Quit
4986 if (rs
->starting_up
)
4988 else if (rs
->got_ctrlc_during_io
)
4990 if (query (_("The target is not responding to GDB commands.\n"
4991 "Stop debugging it? ")))
4992 remote_unpush_and_throw ();
4994 /* If ^C has already been sent once, offer to disconnect. */
4995 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
4997 /* All-stop protocol, and blocked waiting for stop reply. Send
4998 an interrupt request. */
4999 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
5000 target_interrupt (inferior_ptid
);
5002 rs
->got_ctrlc_during_io
= 1;
5006 /* Remove any of the remote.c targets from target stack. Upper targets depend
5007 on it so remove them first. */
5010 remote_unpush_target (void)
5012 pop_all_targets_at_and_above (process_stratum
);
5016 remote_unpush_and_throw (void)
5018 remote_unpush_target ();
5019 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5023 remote_open_1 (const char *name
, int from_tty
,
5024 struct target_ops
*target
, int extended_p
)
5026 struct remote_state
*rs
= get_remote_state ();
5029 error (_("To open a remote debug connection, you need to specify what\n"
5030 "serial device is attached to the remote system\n"
5031 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5033 /* See FIXME above. */
5034 if (!target_async_permitted
)
5035 wait_forever_enabled_p
= 1;
5037 /* If we're connected to a running target, target_preopen will kill it.
5038 Ask this question first, before target_preopen has a chance to kill
5040 if (rs
->remote_desc
!= NULL
&& !have_inferiors ())
5043 && !query (_("Already connected to a remote target. Disconnect? ")))
5044 error (_("Still connected."));
5047 /* Here the possibly existing remote target gets unpushed. */
5048 target_preopen (from_tty
);
5050 /* Make sure we send the passed signals list the next time we resume. */
5051 xfree (rs
->last_pass_packet
);
5052 rs
->last_pass_packet
= NULL
;
5054 /* Make sure we send the program signals list the next time we
5056 xfree (rs
->last_program_signals_packet
);
5057 rs
->last_program_signals_packet
= NULL
;
5059 remote_fileio_reset ();
5060 reopen_exec_file ();
5063 rs
->remote_desc
= remote_serial_open (name
);
5064 if (!rs
->remote_desc
)
5065 perror_with_name (name
);
5067 if (baud_rate
!= -1)
5069 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5071 /* The requested speed could not be set. Error out to
5072 top level after closing remote_desc. Take care to
5073 set remote_desc to NULL to avoid closing remote_desc
5075 serial_close (rs
->remote_desc
);
5076 rs
->remote_desc
= NULL
;
5077 perror_with_name (name
);
5081 serial_setparity (rs
->remote_desc
, serial_parity
);
5082 serial_raw (rs
->remote_desc
);
5084 /* If there is something sitting in the buffer we might take it as a
5085 response to a command, which would be bad. */
5086 serial_flush_input (rs
->remote_desc
);
5090 puts_filtered ("Remote debugging using ");
5091 puts_filtered (name
);
5092 puts_filtered ("\n");
5094 push_target (target
); /* Switch to using remote target now. */
5096 /* Register extra event sources in the event loop. */
5097 remote_async_inferior_event_token
5098 = create_async_event_handler (remote_async_inferior_event_handler
,
5100 rs
->notif_state
= remote_notif_state_allocate ();
5102 /* Reset the target state; these things will be queried either by
5103 remote_query_supported or as they are needed. */
5104 reset_all_packet_configs_support ();
5105 rs
->cached_wait_status
= 0;
5106 rs
->explicit_packet_size
= 0;
5108 rs
->extended
= extended_p
;
5109 rs
->waiting_for_stop_reply
= 0;
5110 rs
->ctrlc_pending_p
= 0;
5111 rs
->got_ctrlc_during_io
= 0;
5113 rs
->general_thread
= not_sent_ptid
;
5114 rs
->continue_thread
= not_sent_ptid
;
5115 rs
->remote_traceframe_number
= -1;
5117 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5119 /* Probe for ability to use "ThreadInfo" query, as required. */
5120 rs
->use_threadinfo_query
= 1;
5121 rs
->use_threadextra_query
= 1;
5123 readahead_cache_invalidate ();
5125 /* Start out by owning the terminal. */
5126 remote_async_terminal_ours_p
= 1;
5128 if (target_async_permitted
)
5130 /* FIXME: cagney/1999-09-23: During the initial connection it is
5131 assumed that the target is already ready and able to respond to
5132 requests. Unfortunately remote_start_remote() eventually calls
5133 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5134 around this. Eventually a mechanism that allows
5135 wait_for_inferior() to expect/get timeouts will be
5137 wait_forever_enabled_p
= 0;
5140 /* First delete any symbols previously loaded from shared libraries. */
5141 no_shared_libraries (NULL
, 0);
5144 init_thread_list ();
5146 /* Start the remote connection. If error() or QUIT, discard this
5147 target (we'd otherwise be in an inconsistent state) and then
5148 propogate the error on up the exception chain. This ensures that
5149 the caller doesn't stumble along blindly assuming that the
5150 function succeeded. The CLI doesn't have this problem but other
5151 UI's, such as MI do.
5153 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5154 this function should return an error indication letting the
5155 caller restore the previous state. Unfortunately the command
5156 ``target remote'' is directly wired to this function making that
5157 impossible. On a positive note, the CLI side of this problem has
5158 been fixed - the function set_cmd_context() makes it possible for
5159 all the ``target ....'' commands to share a common callback
5160 function. See cli-dump.c. */
5165 remote_start_remote (from_tty
, target
, extended_p
);
5167 CATCH (ex
, RETURN_MASK_ALL
)
5169 /* Pop the partially set up target - unless something else did
5170 already before throwing the exception. */
5171 if (rs
->remote_desc
!= NULL
)
5172 remote_unpush_target ();
5173 if (target_async_permitted
)
5174 wait_forever_enabled_p
= 1;
5175 throw_exception (ex
);
5180 remote_btrace_reset ();
5182 if (target_async_permitted
)
5183 wait_forever_enabled_p
= 1;
5186 /* Detach the specified process. */
5189 remote_detach_pid (int pid
)
5191 struct remote_state
*rs
= get_remote_state ();
5193 if (remote_multi_process_p (rs
))
5194 xsnprintf (rs
->buf
, get_remote_packet_size (), "D;%x", pid
);
5196 strcpy (rs
->buf
, "D");
5199 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5201 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5203 else if (rs
->buf
[0] == '\0')
5204 error (_("Remote doesn't know how to detach"));
5206 error (_("Can't detach process."));
5209 /* This detaches a program to which we previously attached, using
5210 inferior_ptid to identify the process. After this is done, GDB
5211 can be used to debug some other program. We better not have left
5212 any breakpoints in the target program or it'll die when it hits
5216 remote_detach_1 (const char *args
, int from_tty
)
5218 int pid
= ptid_get_pid (inferior_ptid
);
5219 struct remote_state
*rs
= get_remote_state ();
5220 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
5224 error (_("Argument given to \"detach\" when remotely debugging."));
5226 if (!target_has_execution
)
5227 error (_("No process to detach from."));
5229 target_announce_detach (from_tty
);
5231 /* Tell the remote target to detach. */
5232 remote_detach_pid (pid
);
5234 /* Exit only if this is the only active inferior. */
5235 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors () == 1)
5236 puts_filtered (_("Ending remote debugging.\n"));
5238 /* Check to see if we are detaching a fork parent. Note that if we
5239 are detaching a fork child, tp == NULL. */
5240 is_fork_parent
= (tp
!= NULL
5241 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5243 /* If doing detach-on-fork, we don't mourn, because that will delete
5244 breakpoints that should be available for the followed inferior. */
5245 if (!is_fork_parent
)
5246 target_mourn_inferior (inferior_ptid
);
5249 inferior_ptid
= null_ptid
;
5250 detach_inferior (pid
);
5255 remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5257 remote_detach_1 (args
, from_tty
);
5261 extended_remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5263 remote_detach_1 (args
, from_tty
);
5266 /* Target follow-fork function for remote targets. On entry, and
5267 at return, the current inferior is the fork parent.
5269 Note that although this is currently only used for extended-remote,
5270 it is named remote_follow_fork in anticipation of using it for the
5271 remote target as well. */
5274 remote_follow_fork (struct target_ops
*ops
, int follow_child
,
5277 struct remote_state
*rs
= get_remote_state ();
5278 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5280 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5281 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5283 /* When following the parent and detaching the child, we detach
5284 the child here. For the case of following the child and
5285 detaching the parent, the detach is done in the target-
5286 independent follow fork code in infrun.c. We can't use
5287 target_detach when detaching an unfollowed child because
5288 the client side doesn't know anything about the child. */
5289 if (detach_fork
&& !follow_child
)
5291 /* Detach the fork child. */
5295 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5296 child_pid
= ptid_get_pid (child_ptid
);
5298 remote_detach_pid (child_pid
);
5299 detach_inferior (child_pid
);
5305 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5306 in the program space of the new inferior. On entry and at return the
5307 current inferior is the exec'ing inferior. INF is the new exec'd
5308 inferior, which may be the same as the exec'ing inferior unless
5309 follow-exec-mode is "new". */
5312 remote_follow_exec (struct target_ops
*ops
,
5313 struct inferior
*inf
, char *execd_pathname
)
5315 /* We know that this is a target file name, so if it has the "target:"
5316 prefix we strip it off before saving it in the program space. */
5317 if (is_target_filename (execd_pathname
))
5318 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5320 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5323 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5326 remote_disconnect (struct target_ops
*target
, const char *args
, int from_tty
)
5329 error (_("Argument given to \"disconnect\" when remotely debugging."));
5331 /* Make sure we unpush even the extended remote targets. Calling
5332 target_mourn_inferior won't unpush, and remote_mourn won't
5333 unpush if there is more than one inferior left. */
5334 unpush_target (target
);
5335 generic_mourn_inferior ();
5338 puts_filtered ("Ending remote debugging.\n");
5341 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5342 be chatty about it. */
5345 extended_remote_attach (struct target_ops
*target
, const char *args
,
5348 struct remote_state
*rs
= get_remote_state ();
5350 char *wait_status
= NULL
;
5352 pid
= parse_pid_to_attach (args
);
5354 /* Remote PID can be freely equal to getpid, do not check it here the same
5355 way as in other targets. */
5357 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5358 error (_("This target does not support attaching to a process"));
5362 char *exec_file
= get_exec_file (0);
5365 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5366 target_pid_to_str (pid_to_ptid (pid
)));
5368 printf_unfiltered (_("Attaching to %s\n"),
5369 target_pid_to_str (pid_to_ptid (pid
)));
5371 gdb_flush (gdb_stdout
);
5374 xsnprintf (rs
->buf
, get_remote_packet_size (), "vAttach;%x", pid
);
5376 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5378 switch (packet_ok (rs
->buf
,
5379 &remote_protocol_packets
[PACKET_vAttach
]))
5382 if (!target_is_non_stop_p ())
5384 /* Save the reply for later. */
5385 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
5386 strcpy (wait_status
, rs
->buf
);
5388 else if (strcmp (rs
->buf
, "OK") != 0)
5389 error (_("Attaching to %s failed with: %s"),
5390 target_pid_to_str (pid_to_ptid (pid
)),
5393 case PACKET_UNKNOWN
:
5394 error (_("This target does not support attaching to a process"));
5396 error (_("Attaching to %s failed"),
5397 target_pid_to_str (pid_to_ptid (pid
)));
5400 set_current_inferior (remote_add_inferior (0, pid
, 1, 0));
5402 inferior_ptid
= pid_to_ptid (pid
);
5404 if (target_is_non_stop_p ())
5406 struct thread_info
*thread
;
5408 /* Get list of threads. */
5409 remote_update_thread_list (target
);
5411 thread
= first_thread_of_process (pid
);
5413 inferior_ptid
= thread
->ptid
;
5415 inferior_ptid
= pid_to_ptid (pid
);
5417 /* Invalidate our notion of the remote current thread. */
5418 record_currthread (rs
, minus_one_ptid
);
5422 /* Now, if we have thread information, update inferior_ptid. */
5423 inferior_ptid
= remote_current_thread (inferior_ptid
);
5425 /* Add the main thread to the thread list. */
5426 add_thread_silent (inferior_ptid
);
5429 /* Next, if the target can specify a description, read it. We do
5430 this before anything involving memory or registers. */
5431 target_find_description ();
5433 if (!target_is_non_stop_p ())
5435 /* Use the previously fetched status. */
5436 gdb_assert (wait_status
!= NULL
);
5438 if (target_can_async_p ())
5440 struct notif_event
*reply
5441 = remote_notif_parse (¬if_client_stop
, wait_status
);
5443 push_stop_reply ((struct stop_reply
*) reply
);
5449 gdb_assert (wait_status
!= NULL
);
5450 strcpy (rs
->buf
, wait_status
);
5451 rs
->cached_wait_status
= 1;
5455 gdb_assert (wait_status
== NULL
);
5458 /* Implementation of the to_post_attach method. */
5461 extended_remote_post_attach (struct target_ops
*ops
, int pid
)
5463 /* Get text, data & bss offsets. */
5466 /* In certain cases GDB might not have had the chance to start
5467 symbol lookup up until now. This could happen if the debugged
5468 binary is not using shared libraries, the vsyscall page is not
5469 present (on Linux) and the binary itself hadn't changed since the
5470 debugging process was started. */
5471 if (symfile_objfile
!= NULL
)
5472 remote_check_symbols();
5476 /* Check for the availability of vCont. This function should also check
5480 remote_vcont_probe (struct remote_state
*rs
)
5484 strcpy (rs
->buf
, "vCont?");
5486 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5489 /* Make sure that the features we assume are supported. */
5490 if (startswith (buf
, "vCont"))
5493 int support_c
, support_C
;
5495 rs
->supports_vCont
.s
= 0;
5496 rs
->supports_vCont
.S
= 0;
5499 rs
->supports_vCont
.t
= 0;
5500 rs
->supports_vCont
.r
= 0;
5501 while (p
&& *p
== ';')
5504 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5505 rs
->supports_vCont
.s
= 1;
5506 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5507 rs
->supports_vCont
.S
= 1;
5508 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5510 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5512 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5513 rs
->supports_vCont
.t
= 1;
5514 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5515 rs
->supports_vCont
.r
= 1;
5517 p
= strchr (p
, ';');
5520 /* If c, and C are not all supported, we can't use vCont. Clearing
5521 BUF will make packet_ok disable the packet. */
5522 if (!support_c
|| !support_C
)
5526 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
5529 /* Helper function for building "vCont" resumptions. Write a
5530 resumption to P. ENDP points to one-passed-the-end of the buffer
5531 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5532 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5533 resumed thread should be single-stepped and/or signalled. If PTID
5534 equals minus_one_ptid, then all threads are resumed; if PTID
5535 represents a process, then all threads of the process are resumed;
5536 the thread to be stepped and/or signalled is given in the global
5540 append_resumption (char *p
, char *endp
,
5541 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5543 struct remote_state
*rs
= get_remote_state ();
5545 if (step
&& siggnal
!= GDB_SIGNAL_0
)
5546 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
5548 /* GDB is willing to range step. */
5549 && use_range_stepping
5550 /* Target supports range stepping. */
5551 && rs
->supports_vCont
.r
5552 /* We don't currently support range stepping multiple
5553 threads with a wildcard (though the protocol allows it,
5554 so stubs shouldn't make an active effort to forbid
5556 && !(remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5558 struct thread_info
*tp
;
5560 if (ptid_equal (ptid
, minus_one_ptid
))
5562 /* If we don't know about the target thread's tid, then
5563 we're resuming magic_null_ptid (see caller). */
5564 tp
= find_thread_ptid (magic_null_ptid
);
5567 tp
= find_thread_ptid (ptid
);
5568 gdb_assert (tp
!= NULL
);
5570 if (tp
->control
.may_range_step
)
5572 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5574 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
5575 phex_nz (tp
->control
.step_range_start
,
5577 phex_nz (tp
->control
.step_range_end
,
5581 p
+= xsnprintf (p
, endp
- p
, ";s");
5584 p
+= xsnprintf (p
, endp
- p
, ";s");
5585 else if (siggnal
!= GDB_SIGNAL_0
)
5586 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
5588 p
+= xsnprintf (p
, endp
- p
, ";c");
5590 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
5594 /* All (-1) threads of process. */
5595 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5597 p
+= xsnprintf (p
, endp
- p
, ":");
5598 p
= write_ptid (p
, endp
, nptid
);
5600 else if (!ptid_equal (ptid
, minus_one_ptid
))
5602 p
+= xsnprintf (p
, endp
- p
, ":");
5603 p
= write_ptid (p
, endp
, ptid
);
5609 /* Clear the thread's private info on resume. */
5612 resume_clear_thread_private_info (struct thread_info
*thread
)
5614 if (thread
->priv
!= NULL
)
5616 thread
->priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
5617 thread
->priv
->watch_data_address
= 0;
5621 /* Append a vCont continue-with-signal action for threads that have a
5622 non-zero stop signal. */
5625 append_pending_thread_resumptions (char *p
, char *endp
, ptid_t ptid
)
5627 struct thread_info
*thread
;
5629 ALL_NON_EXITED_THREADS (thread
)
5630 if (ptid_match (thread
->ptid
, ptid
)
5631 && !ptid_equal (inferior_ptid
, thread
->ptid
)
5632 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
5634 p
= append_resumption (p
, endp
, thread
->ptid
,
5635 0, thread
->suspend
.stop_signal
);
5636 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
5637 resume_clear_thread_private_info (thread
);
5643 /* Set the target running, using the packets that use Hc
5647 remote_resume_with_hc (struct target_ops
*ops
,
5648 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5650 struct remote_state
*rs
= get_remote_state ();
5651 struct thread_info
*thread
;
5654 rs
->last_sent_signal
= siggnal
;
5655 rs
->last_sent_step
= step
;
5657 /* The c/s/C/S resume packets use Hc, so set the continue
5659 if (ptid_equal (ptid
, minus_one_ptid
))
5660 set_continue_thread (any_thread_ptid
);
5662 set_continue_thread (ptid
);
5664 ALL_NON_EXITED_THREADS (thread
)
5665 resume_clear_thread_private_info (thread
);
5668 if (execution_direction
== EXEC_REVERSE
)
5670 /* We don't pass signals to the target in reverse exec mode. */
5671 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
5672 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5675 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
5676 error (_("Remote reverse-step not supported."));
5677 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
5678 error (_("Remote reverse-continue not supported."));
5680 strcpy (buf
, step
? "bs" : "bc");
5682 else if (siggnal
!= GDB_SIGNAL_0
)
5684 buf
[0] = step
? 'S' : 'C';
5685 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
5686 buf
[2] = tohex (((int) siggnal
) & 0xf);
5690 strcpy (buf
, step
? "s" : "c");
5695 /* Resume the remote inferior by using a "vCont" packet. The thread
5696 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5697 resumed thread should be single-stepped and/or signalled. If PTID
5698 equals minus_one_ptid, then all threads are resumed; the thread to
5699 be stepped and/or signalled is given in the global INFERIOR_PTID.
5700 This function returns non-zero iff it resumes the inferior.
5702 This function issues a strict subset of all possible vCont commands
5706 remote_resume_with_vcont (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5708 struct remote_state
*rs
= get_remote_state ();
5712 /* No reverse execution actions defined for vCont. */
5713 if (execution_direction
== EXEC_REVERSE
)
5716 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5717 remote_vcont_probe (rs
);
5719 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
5723 endp
= rs
->buf
+ get_remote_packet_size ();
5725 /* If we could generate a wider range of packets, we'd have to worry
5726 about overflowing BUF. Should there be a generic
5727 "multi-part-packet" packet? */
5729 p
+= xsnprintf (p
, endp
- p
, "vCont");
5731 if (ptid_equal (ptid
, magic_null_ptid
))
5733 /* MAGIC_NULL_PTID means that we don't have any active threads,
5734 so we don't have any TID numbers the inferior will
5735 understand. Make sure to only send forms that do not specify
5737 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
5739 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
5741 /* Resume all threads (of all processes, or of a single
5742 process), with preference for INFERIOR_PTID. This assumes
5743 inferior_ptid belongs to the set of all threads we are about
5745 if (step
|| siggnal
!= GDB_SIGNAL_0
)
5747 /* Step inferior_ptid, with or without signal. */
5748 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
5751 /* Also pass down any pending signaled resumption for other
5752 threads not the current. */
5753 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
5755 /* And continue others without a signal. */
5756 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
5760 /* Scheduler locking; resume only PTID. */
5761 append_resumption (p
, endp
, ptid
, step
, siggnal
);
5764 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
5767 if (target_is_non_stop_p ())
5769 /* In non-stop, the stub replies to vCont with "OK". The stop
5770 reply will be reported asynchronously by means of a `%Stop'
5772 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5773 if (strcmp (rs
->buf
, "OK") != 0)
5774 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5780 /* Tell the remote machine to resume. */
5783 remote_resume (struct target_ops
*ops
,
5784 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5786 struct remote_state
*rs
= get_remote_state ();
5788 /* When connected in non-stop mode, the core resumes threads
5789 individually. Resuming remote threads directly in target_resume
5790 would thus result in sending one packet per thread. Instead, to
5791 minimize roundtrip latency, here we just store the resume
5792 request; the actual remote resumption will be done in
5793 target_commit_resume / remote_commit_resume, where we'll be able
5794 to do vCont action coalescing. */
5795 if (target_is_non_stop_p () && execution_direction
!= EXEC_REVERSE
)
5797 struct private_thread_info
*remote_thr
;
5799 if (ptid_equal (minus_one_ptid
, ptid
) || ptid_is_pid (ptid
))
5800 remote_thr
= get_private_info_ptid (inferior_ptid
);
5802 remote_thr
= get_private_info_ptid (ptid
);
5803 remote_thr
->last_resume_step
= step
;
5804 remote_thr
->last_resume_sig
= siggnal
;
5808 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5809 (explained in remote-notif.c:handle_notification) so
5810 remote_notif_process is not called. We need find a place where
5811 it is safe to start a 'vNotif' sequence. It is good to do it
5812 before resuming inferior, because inferior was stopped and no RSP
5813 traffic at that moment. */
5814 if (!target_is_non_stop_p ())
5815 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
5817 rs
->last_resume_exec_dir
= execution_direction
;
5819 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
5820 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
5821 remote_resume_with_hc (ops
, ptid
, step
, siggnal
);
5823 /* We are about to start executing the inferior, let's register it
5824 with the event loop. NOTE: this is the one place where all the
5825 execution commands end up. We could alternatively do this in each
5826 of the execution commands in infcmd.c. */
5827 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5828 into infcmd.c in order to allow inferior function calls to work
5829 NOT asynchronously. */
5830 if (target_can_async_p ())
5833 /* We've just told the target to resume. The remote server will
5834 wait for the inferior to stop, and then send a stop reply. In
5835 the mean time, we can't start another command/query ourselves
5836 because the stub wouldn't be ready to process it. This applies
5837 only to the base all-stop protocol, however. In non-stop (which
5838 only supports vCont), the stub replies with an "OK", and is
5839 immediate able to process further serial input. */
5840 if (!target_is_non_stop_p ())
5841 rs
->waiting_for_stop_reply
= 1;
5844 static void check_pending_events_prevent_wildcard_vcont
5845 (int *may_global_wildcard_vcont
);
5846 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
5848 /* Private per-inferior info for target remote processes. */
5850 struct private_inferior
5852 /* Whether we can send a wildcard vCont for this process. */
5853 int may_wildcard_vcont
;
5856 /* Structure used to track the construction of a vCont packet in the
5857 outgoing packet buffer. This is used to send multiple vCont
5858 packets if we have more actions than would fit a single packet. */
5860 struct vcont_builder
5862 /* Pointer to the first action. P points here if no action has been
5866 /* Where the next action will be appended. */
5869 /* The end of the buffer. Must never write past this. */
5873 /* Prepare the outgoing buffer for a new vCont packet. */
5876 vcont_builder_restart (struct vcont_builder
*builder
)
5878 struct remote_state
*rs
= get_remote_state ();
5880 builder
->p
= rs
->buf
;
5881 builder
->endp
= rs
->buf
+ get_remote_packet_size ();
5882 builder
->p
+= xsnprintf (builder
->p
, builder
->endp
- builder
->p
, "vCont");
5883 builder
->first_action
= builder
->p
;
5886 /* If the vCont packet being built has any action, send it to the
5890 vcont_builder_flush (struct vcont_builder
*builder
)
5892 struct remote_state
*rs
;
5894 if (builder
->p
== builder
->first_action
)
5897 rs
= get_remote_state ();
5899 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5900 if (strcmp (rs
->buf
, "OK") != 0)
5901 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5904 /* The largest action is range-stepping, with its two addresses. This
5905 is more than sufficient. If a new, bigger action is created, it'll
5906 quickly trigger a failed assertion in append_resumption (and we'll
5908 #define MAX_ACTION_SIZE 200
5910 /* Append a new vCont action in the outgoing packet being built. If
5911 the action doesn't fit the packet along with previous actions, push
5912 what we've got so far to the remote end and start over a new vCont
5913 packet (with the new action). */
5916 vcont_builder_push_action (struct vcont_builder
*builder
,
5917 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5919 char buf
[MAX_ACTION_SIZE
+ 1];
5923 endp
= append_resumption (buf
, buf
+ sizeof (buf
),
5924 ptid
, step
, siggnal
);
5926 /* Check whether this new action would fit in the vCont packet along
5927 with previous actions. If not, send what we've got so far and
5928 start a new vCont packet. */
5930 if (rsize
> builder
->endp
- builder
->p
)
5932 vcont_builder_flush (builder
);
5933 vcont_builder_restart (builder
);
5935 /* Should now fit. */
5936 gdb_assert (rsize
<= builder
->endp
- builder
->p
);
5939 memcpy (builder
->p
, buf
, rsize
);
5940 builder
->p
+= rsize
;
5944 /* to_commit_resume implementation. */
5947 remote_commit_resume (struct target_ops
*ops
)
5949 struct remote_state
*rs
= get_remote_state ();
5950 struct inferior
*inf
;
5951 struct thread_info
*tp
;
5952 int any_process_wildcard
;
5953 int may_global_wildcard_vcont
;
5954 struct vcont_builder vcont_builder
;
5956 /* If connected in all-stop mode, we'd send the remote resume
5957 request directly from remote_resume. Likewise if
5958 reverse-debugging, as there are no defined vCont actions for
5959 reverse execution. */
5960 if (!target_is_non_stop_p () || execution_direction
== EXEC_REVERSE
)
5963 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
5964 instead of resuming all threads of each process individually.
5965 However, if any thread of a process must remain halted, we can't
5966 send wildcard resumes and must send one action per thread.
5968 Care must be taken to not resume threads/processes the server
5969 side already told us are stopped, but the core doesn't know about
5970 yet, because the events are still in the vStopped notification
5973 #1 => vCont s:p1.1;c
5975 #3 <= %Stopped T05 p1.1
5980 #8 (infrun handles the stop for p1.1 and continues stepping)
5981 #9 => vCont s:p1.1;c
5983 The last vCont above would resume thread p1.2 by mistake, because
5984 the server has no idea that the event for p1.2 had not been
5987 The server side must similarly ignore resume actions for the
5988 thread that has a pending %Stopped notification (and any other
5989 threads with events pending), until GDB acks the notification
5990 with vStopped. Otherwise, e.g., the following case is
5993 #1 => g (or any other packet)
5995 #3 <= %Stopped T05 p1.2
5996 #4 => vCont s:p1.1;c
5999 Above, the server must not resume thread p1.2. GDB can't know
6000 that p1.2 stopped until it acks the %Stopped notification, and
6001 since from GDB's perspective all threads should be running, it
6004 Finally, special care must also be given to handling fork/vfork
6005 events. A (v)fork event actually tells us that two processes
6006 stopped -- the parent and the child. Until we follow the fork,
6007 we must not resume the child. Therefore, if we have a pending
6008 fork follow, we must not send a global wildcard resume action
6009 (vCont;c). We can still send process-wide wildcards though. */
6011 /* Start by assuming a global wildcard (vCont;c) is possible. */
6012 may_global_wildcard_vcont
= 1;
6014 /* And assume every process is individually wildcard-able too. */
6015 ALL_NON_EXITED_INFERIORS (inf
)
6017 if (inf
->priv
== NULL
)
6018 inf
->priv
= XNEW (struct private_inferior
);
6019 inf
->priv
->may_wildcard_vcont
= 1;
6022 /* Check for any pending events (not reported or processed yet) and
6023 disable process and global wildcard resumes appropriately. */
6024 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6026 ALL_NON_EXITED_THREADS (tp
)
6028 /* If a thread of a process is not meant to be resumed, then we
6029 can't wildcard that process. */
6032 tp
->inf
->priv
->may_wildcard_vcont
= 0;
6034 /* And if we can't wildcard a process, we can't wildcard
6035 everything either. */
6036 may_global_wildcard_vcont
= 0;
6040 /* If a thread is the parent of an unfollowed fork, then we
6041 can't do a global wildcard, as that would resume the fork
6043 if (is_pending_fork_parent_thread (tp
))
6044 may_global_wildcard_vcont
= 0;
6047 /* Now let's build the vCont packet(s). Actions must be appended
6048 from narrower to wider scopes (thread -> process -> global). If
6049 we end up with too many actions for a single packet vcont_builder
6050 flushes the current vCont packet to the remote side and starts a
6052 vcont_builder_restart (&vcont_builder
);
6054 /* Threads first. */
6055 ALL_NON_EXITED_THREADS (tp
)
6057 struct private_thread_info
*remote_thr
= tp
->priv
;
6059 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
6062 gdb_assert (!thread_is_in_step_over_chain (tp
));
6064 if (!remote_thr
->last_resume_step
6065 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
6066 && tp
->inf
->priv
->may_wildcard_vcont
)
6068 /* We'll send a wildcard resume instead. */
6069 remote_thr
->vcont_resumed
= 1;
6073 vcont_builder_push_action (&vcont_builder
, tp
->ptid
,
6074 remote_thr
->last_resume_step
,
6075 remote_thr
->last_resume_sig
);
6076 remote_thr
->vcont_resumed
= 1;
6079 /* Now check whether we can send any process-wide wildcard. This is
6080 to avoid sending a global wildcard in the case nothing is
6081 supposed to be resumed. */
6082 any_process_wildcard
= 0;
6084 ALL_NON_EXITED_INFERIORS (inf
)
6086 if (inf
->priv
->may_wildcard_vcont
)
6088 any_process_wildcard
= 1;
6093 if (any_process_wildcard
)
6095 /* If all processes are wildcard-able, then send a single "c"
6096 action, otherwise, send an "all (-1) threads of process"
6097 continue action for each running process, if any. */
6098 if (may_global_wildcard_vcont
)
6100 vcont_builder_push_action (&vcont_builder
, minus_one_ptid
,
6105 ALL_NON_EXITED_INFERIORS (inf
)
6107 if (inf
->priv
->may_wildcard_vcont
)
6109 vcont_builder_push_action (&vcont_builder
,
6110 pid_to_ptid (inf
->pid
),
6117 vcont_builder_flush (&vcont_builder
);
6122 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6123 thread, all threads of a remote process, or all threads of all
6127 remote_stop_ns (ptid_t ptid
)
6129 struct remote_state
*rs
= get_remote_state ();
6131 char *endp
= rs
->buf
+ get_remote_packet_size ();
6133 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6134 remote_vcont_probe (rs
);
6136 if (!rs
->supports_vCont
.t
)
6137 error (_("Remote server does not support stopping threads"));
6139 if (ptid_equal (ptid
, minus_one_ptid
)
6140 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
6141 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6146 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6148 if (ptid_is_pid (ptid
))
6149 /* All (-1) threads of process. */
6150 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
6153 /* Small optimization: if we already have a stop reply for
6154 this thread, no use in telling the stub we want this
6156 if (peek_stop_reply (ptid
))
6162 write_ptid (p
, endp
, nptid
);
6165 /* In non-stop, we get an immediate OK reply. The stop reply will
6166 come in asynchronously by notification. */
6168 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6169 if (strcmp (rs
->buf
, "OK") != 0)
6170 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
6173 /* All-stop version of target_interrupt. Sends a break or a ^C to
6174 interrupt the remote target. It is undefined which thread of which
6175 process reports the interrupt. */
6178 remote_interrupt_as (void)
6180 struct remote_state
*rs
= get_remote_state ();
6182 rs
->ctrlc_pending_p
= 1;
6184 /* If the inferior is stopped already, but the core didn't know
6185 about it yet, just ignore the request. The cached wait status
6186 will be collected in remote_wait. */
6187 if (rs
->cached_wait_status
)
6190 /* Send interrupt_sequence to remote target. */
6191 send_interrupt_sequence ();
6194 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6195 the remote target. It is undefined which thread of which process
6196 reports the interrupt. Throws an error if the packet is not
6197 supported by the server. */
6200 remote_interrupt_ns (void)
6202 struct remote_state
*rs
= get_remote_state ();
6204 char *endp
= rs
->buf
+ get_remote_packet_size ();
6206 xsnprintf (p
, endp
- p
, "vCtrlC");
6208 /* In non-stop, we get an immediate OK reply. The stop reply will
6209 come in asynchronously by notification. */
6211 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6213 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6217 case PACKET_UNKNOWN
:
6218 error (_("No support for interrupting the remote target."));
6220 error (_("Interrupting target failed: %s"), rs
->buf
);
6224 /* Implement the to_stop function for the remote targets. */
6227 remote_stop (struct target_ops
*self
, ptid_t ptid
)
6230 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6232 if (target_is_non_stop_p ())
6233 remote_stop_ns (ptid
);
6236 /* We don't currently have a way to transparently pause the
6237 remote target in all-stop mode. Interrupt it instead. */
6238 remote_interrupt_as ();
6242 /* Implement the to_interrupt function for the remote targets. */
6245 remote_interrupt (struct target_ops
*self
, ptid_t ptid
)
6247 struct remote_state
*rs
= get_remote_state ();
6250 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6252 if (target_is_non_stop_p ())
6253 remote_interrupt_ns ();
6255 remote_interrupt_as ();
6258 /* Implement the to_pass_ctrlc function for the remote targets. */
6261 remote_pass_ctrlc (struct target_ops
*self
)
6263 struct remote_state
*rs
= get_remote_state ();
6266 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6268 /* If we're starting up, we're not fully synced yet. Quit
6270 if (rs
->starting_up
)
6272 /* If ^C has already been sent once, offer to disconnect. */
6273 else if (rs
->ctrlc_pending_p
)
6276 target_interrupt (inferior_ptid
);
6279 /* Ask the user what to do when an interrupt is received. */
6282 interrupt_query (void)
6284 struct remote_state
*rs
= get_remote_state ();
6286 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6288 if (query (_("The target is not responding to interrupt requests.\n"
6289 "Stop debugging it? ")))
6291 remote_unpush_target ();
6292 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6297 if (query (_("Interrupted while waiting for the program.\n"
6298 "Give up waiting? ")))
6303 /* Enable/disable target terminal ownership. Most targets can use
6304 terminal groups to control terminal ownership. Remote targets are
6305 different in that explicit transfer of ownership to/from GDB/target
6309 remote_terminal_inferior (struct target_ops
*self
)
6311 /* FIXME: cagney/1999-09-27: Make calls to target_terminal::*()
6312 idempotent. The event-loop GDB talking to an asynchronous target
6313 with a synchronous command calls this function from both
6314 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
6315 transfer the terminal to the target when it shouldn't this guard
6317 if (!remote_async_terminal_ours_p
)
6319 remote_async_terminal_ours_p
= 0;
6320 /* NOTE: At this point we could also register our selves as the
6321 recipient of all input. Any characters typed could then be
6322 passed on down to the target. */
6326 remote_terminal_ours (struct target_ops
*self
)
6328 /* See FIXME in remote_terminal_inferior. */
6329 if (remote_async_terminal_ours_p
)
6331 remote_async_terminal_ours_p
= 1;
6335 remote_console_output (char *msg
)
6339 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6342 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6346 fputs_unfiltered (tb
, gdb_stdtarg
);
6348 gdb_flush (gdb_stdtarg
);
6351 DEF_VEC_O(cached_reg_t
);
6353 typedef struct stop_reply
6355 struct notif_event base
;
6357 /* The identifier of the thread about this event */
6360 /* The remote state this event is associated with. When the remote
6361 connection, represented by a remote_state object, is closed,
6362 all the associated stop_reply events should be released. */
6363 struct remote_state
*rs
;
6365 struct target_waitstatus ws
;
6367 /* Expedited registers. This makes remote debugging a bit more
6368 efficient for those targets that provide critical registers as
6369 part of their normal status mechanism (as another roundtrip to
6370 fetch them is avoided). */
6371 VEC(cached_reg_t
) *regcache
;
6373 enum target_stop_reason stop_reason
;
6375 CORE_ADDR watch_data_address
;
6380 DECLARE_QUEUE_P (stop_reply_p
);
6381 DEFINE_QUEUE_P (stop_reply_p
);
6382 /* The list of already fetched and acknowledged stop events. This
6383 queue is used for notification Stop, and other notifications
6384 don't need queue for their events, because the notification events
6385 of Stop can't be consumed immediately, so that events should be
6386 queued first, and be consumed by remote_wait_{ns,as} one per
6387 time. Other notifications can consume their events immediately,
6388 so queue is not needed for them. */
6389 static QUEUE (stop_reply_p
) *stop_reply_queue
;
6392 stop_reply_xfree (struct stop_reply
*r
)
6394 notif_event_xfree ((struct notif_event
*) r
);
6397 /* Return the length of the stop reply queue. */
6400 stop_reply_queue_length (void)
6402 return QUEUE_length (stop_reply_p
, stop_reply_queue
);
6406 remote_notif_stop_parse (struct notif_client
*self
, char *buf
,
6407 struct notif_event
*event
)
6409 remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6413 remote_notif_stop_ack (struct notif_client
*self
, char *buf
,
6414 struct notif_event
*event
)
6416 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6419 putpkt (self
->ack_command
);
6421 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6422 /* We got an unknown stop reply. */
6423 error (_("Unknown stop reply"));
6425 push_stop_reply (stop_reply
);
6429 remote_notif_stop_can_get_pending_events (struct notif_client
*self
)
6431 /* We can't get pending events in remote_notif_process for
6432 notification stop, and we have to do this in remote_wait_ns
6433 instead. If we fetch all queued events from stub, remote stub
6434 may exit and we have no chance to process them back in
6436 mark_async_event_handler (remote_async_inferior_event_token
);
6441 stop_reply_dtr (struct notif_event
*event
)
6443 struct stop_reply
*r
= (struct stop_reply
*) event
;
6448 VEC_iterate (cached_reg_t
, r
->regcache
, ix
, reg
);
6452 VEC_free (cached_reg_t
, r
->regcache
);
6455 static struct notif_event
*
6456 remote_notif_stop_alloc_reply (void)
6458 /* We cast to a pointer to the "base class". */
6459 struct notif_event
*r
= (struct notif_event
*) XNEW (struct stop_reply
);
6461 r
->dtr
= stop_reply_dtr
;
6466 /* A client of notification Stop. */
6468 struct notif_client notif_client_stop
=
6472 remote_notif_stop_parse
,
6473 remote_notif_stop_ack
,
6474 remote_notif_stop_can_get_pending_events
,
6475 remote_notif_stop_alloc_reply
,
6479 /* A parameter to pass data in and out. */
6481 struct queue_iter_param
6484 struct stop_reply
*output
;
6487 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6488 the pid of the process that owns the threads we want to check, or
6489 -1 if we want to check all threads. */
6492 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6495 if (ws
->kind
== TARGET_WAITKIND_FORKED
6496 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6498 if (event_pid
== -1 || event_pid
== ptid_get_pid (thread_ptid
))
6505 /* Return the thread's pending status used to determine whether the
6506 thread is a fork parent stopped at a fork event. */
6508 static struct target_waitstatus
*
6509 thread_pending_fork_status (struct thread_info
*thread
)
6511 if (thread
->suspend
.waitstatus_pending_p
)
6512 return &thread
->suspend
.waitstatus
;
6514 return &thread
->pending_follow
;
6517 /* Determine if THREAD is a pending fork parent thread. */
6520 is_pending_fork_parent_thread (struct thread_info
*thread
)
6522 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6525 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
6528 /* Check whether EVENT is a fork event, and if it is, remove the
6529 fork child from the context list passed in DATA. */
6532 remove_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
6533 QUEUE_ITER (stop_reply_p
) *iter
,
6537 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6538 struct threads_listing_context
*context
6539 = (struct threads_listing_context
*) param
->input
;
6541 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6542 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
6543 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
6544 threads_listing_context_remove (&event
->ws
, context
);
6549 /* If CONTEXT contains any fork child threads that have not been
6550 reported yet, remove them from the CONTEXT list. If such a
6551 thread exists it is because we are stopped at a fork catchpoint
6552 and have not yet called follow_fork, which will set up the
6553 host-side data structures for the new process. */
6556 remove_new_fork_children (struct threads_listing_context
*context
)
6558 struct thread_info
* thread
;
6560 struct notif_client
*notif
= ¬if_client_stop
;
6561 struct queue_iter_param param
;
6563 /* For any threads stopped at a fork event, remove the corresponding
6564 fork child threads from the CONTEXT list. */
6565 ALL_NON_EXITED_THREADS (thread
)
6567 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6569 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
6571 threads_listing_context_remove (ws
, context
);
6575 /* Check for any pending fork events (not reported or processed yet)
6576 in process PID and remove those fork child threads from the
6577 CONTEXT list as well. */
6578 remote_notif_get_pending_events (notif
);
6579 param
.input
= context
;
6580 param
.output
= NULL
;
6581 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6582 remove_child_of_pending_fork
, ¶m
);
6585 /* Check whether EVENT would prevent a global or process wildcard
6589 check_pending_event_prevents_wildcard_vcont_callback
6590 (QUEUE (stop_reply_p
) *q
,
6591 QUEUE_ITER (stop_reply_p
) *iter
,
6595 struct inferior
*inf
;
6596 int *may_global_wildcard_vcont
= (int *) data
;
6598 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
6599 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
6602 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6603 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
6604 *may_global_wildcard_vcont
= 0;
6606 inf
= find_inferior_ptid (event
->ptid
);
6608 /* This may be the first time we heard about this process.
6609 Regardless, we must not do a global wildcard resume, otherwise
6610 we'd resume this process too. */
6611 *may_global_wildcard_vcont
= 0;
6613 inf
->priv
->may_wildcard_vcont
= 0;
6618 /* Check whether any event pending in the vStopped queue would prevent
6619 a global or process wildcard vCont action. Clear
6620 *may_global_wildcard if we can't do a global wildcard (vCont;c),
6621 and clear the event inferior's may_wildcard_vcont flag if we can't
6622 do a process-wide wildcard resume (vCont;c:pPID.-1). */
6625 check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard
)
6627 struct notif_client
*notif
= ¬if_client_stop
;
6629 remote_notif_get_pending_events (notif
);
6630 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6631 check_pending_event_prevents_wildcard_vcont_callback
,
6632 may_global_wildcard
);
6635 /* Remove stop replies in the queue if its pid is equal to the given
6639 remove_stop_reply_for_inferior (QUEUE (stop_reply_p
) *q
,
6640 QUEUE_ITER (stop_reply_p
) *iter
,
6644 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6645 struct inferior
*inf
= (struct inferior
*) param
->input
;
6647 if (ptid_get_pid (event
->ptid
) == inf
->pid
)
6649 stop_reply_xfree (event
);
6650 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6656 /* Discard all pending stop replies of inferior INF. */
6659 discard_pending_stop_replies (struct inferior
*inf
)
6661 struct queue_iter_param param
;
6662 struct stop_reply
*reply
;
6663 struct remote_state
*rs
= get_remote_state ();
6664 struct remote_notif_state
*rns
= rs
->notif_state
;
6666 /* This function can be notified when an inferior exists. When the
6667 target is not remote, the notification state is NULL. */
6668 if (rs
->remote_desc
== NULL
)
6671 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
6673 /* Discard the in-flight notification. */
6674 if (reply
!= NULL
&& ptid_get_pid (reply
->ptid
) == inf
->pid
)
6676 stop_reply_xfree (reply
);
6677 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
6681 param
.output
= NULL
;
6682 /* Discard the stop replies we have already pulled with
6684 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6685 remove_stop_reply_for_inferior
, ¶m
);
6688 /* If its remote state is equal to the given remote state,
6689 remove EVENT from the stop reply queue. */
6692 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p
) *q
,
6693 QUEUE_ITER (stop_reply_p
) *iter
,
6697 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6698 struct remote_state
*rs
= (struct remote_state
*) param
->input
;
6700 if (event
->rs
== rs
)
6702 stop_reply_xfree (event
);
6703 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6709 /* Discard the stop replies for RS in stop_reply_queue. */
6712 discard_pending_stop_replies_in_queue (struct remote_state
*rs
)
6714 struct queue_iter_param param
;
6717 param
.output
= NULL
;
6718 /* Discard the stop replies we have already pulled with
6720 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6721 remove_stop_reply_of_remote_state
, ¶m
);
6724 /* A parameter to pass data in and out. */
6727 remote_notif_remove_once_on_match (QUEUE (stop_reply_p
) *q
,
6728 QUEUE_ITER (stop_reply_p
) *iter
,
6732 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6733 ptid_t
*ptid
= (ptid_t
*) param
->input
;
6735 if (ptid_match (event
->ptid
, *ptid
))
6737 param
->output
= event
;
6738 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6745 /* Remove the first reply in 'stop_reply_queue' which matches
6748 static struct stop_reply
*
6749 remote_notif_remove_queued_reply (ptid_t ptid
)
6751 struct queue_iter_param param
;
6753 param
.input
= &ptid
;
6754 param
.output
= NULL
;
6756 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6757 remote_notif_remove_once_on_match
, ¶m
);
6759 fprintf_unfiltered (gdb_stdlog
,
6760 "notif: discard queued event: 'Stop' in %s\n",
6761 target_pid_to_str (ptid
));
6763 return param
.output
;
6766 /* Look for a queued stop reply belonging to PTID. If one is found,
6767 remove it from the queue, and return it. Returns NULL if none is
6768 found. If there are still queued events left to process, tell the
6769 event loop to get back to target_wait soon. */
6771 static struct stop_reply
*
6772 queued_stop_reply (ptid_t ptid
)
6774 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
6776 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
6777 /* There's still at least an event left. */
6778 mark_async_event_handler (remote_async_inferior_event_token
);
6783 /* Push a fully parsed stop reply in the stop reply queue. Since we
6784 know that we now have at least one queued event left to pass to the
6785 core side, tell the event loop to get back to target_wait soon. */
6788 push_stop_reply (struct stop_reply
*new_event
)
6790 QUEUE_enque (stop_reply_p
, stop_reply_queue
, new_event
);
6793 fprintf_unfiltered (gdb_stdlog
,
6794 "notif: push 'Stop' %s to queue %d\n",
6795 target_pid_to_str (new_event
->ptid
),
6796 QUEUE_length (stop_reply_p
,
6799 mark_async_event_handler (remote_async_inferior_event_token
);
6803 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p
) *q
,
6804 QUEUE_ITER (stop_reply_p
) *iter
,
6805 struct stop_reply
*event
,
6808 ptid_t
*ptid
= (ptid_t
*) data
;
6810 return !(ptid_equal (*ptid
, event
->ptid
)
6811 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
);
6814 /* Returns true if we have a stop reply for PTID. */
6817 peek_stop_reply (ptid_t ptid
)
6819 return !QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6820 stop_reply_match_ptid_and_ws
, &ptid
);
6823 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6824 starting with P and ending with PEND matches PREFIX. */
6827 strprefix (const char *p
, const char *pend
, const char *prefix
)
6829 for ( ; p
< pend
; p
++, prefix
++)
6832 return *prefix
== '\0';
6835 /* Parse the stop reply in BUF. Either the function succeeds, and the
6836 result is stored in EVENT, or throws an error. */
6839 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
6841 struct remote_arch_state
*rsa
= get_remote_arch_state ();
6846 event
->ptid
= null_ptid
;
6847 event
->rs
= get_remote_state ();
6848 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
6849 event
->ws
.value
.integer
= 0;
6850 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6851 event
->regcache
= NULL
;
6856 case 'T': /* Status with PC, SP, FP, ... */
6857 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6858 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6860 n... = register number
6861 r... = register contents
6864 p
= &buf
[3]; /* after Txx */
6870 p1
= strchr (p
, ':');
6872 error (_("Malformed packet(a) (missing colon): %s\n\
6876 error (_("Malformed packet(a) (missing register number): %s\n\
6880 /* Some "registers" are actually extended stop information.
6881 Note if you're adding a new entry here: GDB 7.9 and
6882 earlier assume that all register "numbers" that start
6883 with an hex digit are real register numbers. Make sure
6884 the server only sends such a packet if it knows the
6885 client understands it. */
6887 if (strprefix (p
, p1
, "thread"))
6888 event
->ptid
= read_ptid (++p1
, &p
);
6889 else if (strprefix (p
, p1
, "syscall_entry"))
6893 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
6894 p
= unpack_varlen_hex (++p1
, &sysno
);
6895 event
->ws
.value
.syscall_number
= (int) sysno
;
6897 else if (strprefix (p
, p1
, "syscall_return"))
6901 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
6902 p
= unpack_varlen_hex (++p1
, &sysno
);
6903 event
->ws
.value
.syscall_number
= (int) sysno
;
6905 else if (strprefix (p
, p1
, "watch")
6906 || strprefix (p
, p1
, "rwatch")
6907 || strprefix (p
, p1
, "awatch"))
6909 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
6910 p
= unpack_varlen_hex (++p1
, &addr
);
6911 event
->watch_data_address
= (CORE_ADDR
) addr
;
6913 else if (strprefix (p
, p1
, "swbreak"))
6915 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
6917 /* Make sure the stub doesn't forget to indicate support
6919 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
6920 error (_("Unexpected swbreak stop reason"));
6922 /* The value part is documented as "must be empty",
6923 though we ignore it, in case we ever decide to make
6924 use of it in a backward compatible way. */
6925 p
= strchrnul (p1
+ 1, ';');
6927 else if (strprefix (p
, p1
, "hwbreak"))
6929 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
6931 /* Make sure the stub doesn't forget to indicate support
6933 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
6934 error (_("Unexpected hwbreak stop reason"));
6937 p
= strchrnul (p1
+ 1, ';');
6939 else if (strprefix (p
, p1
, "library"))
6941 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
6942 p
= strchrnul (p1
+ 1, ';');
6944 else if (strprefix (p
, p1
, "replaylog"))
6946 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
6947 /* p1 will indicate "begin" or "end", but it makes
6948 no difference for now, so ignore it. */
6949 p
= strchrnul (p1
+ 1, ';');
6951 else if (strprefix (p
, p1
, "core"))
6955 p
= unpack_varlen_hex (++p1
, &c
);
6958 else if (strprefix (p
, p1
, "fork"))
6960 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6961 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
6963 else if (strprefix (p
, p1
, "vfork"))
6965 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6966 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
6968 else if (strprefix (p
, p1
, "vforkdone"))
6970 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
6971 p
= strchrnul (p1
+ 1, ';');
6973 else if (strprefix (p
, p1
, "exec"))
6976 char pathname
[PATH_MAX
];
6979 /* Determine the length of the execd pathname. */
6980 p
= unpack_varlen_hex (++p1
, &ignored
);
6981 pathlen
= (p
- p1
) / 2;
6983 /* Save the pathname for event reporting and for
6984 the next run command. */
6985 hex2bin (p1
, (gdb_byte
*) pathname
, pathlen
);
6986 pathname
[pathlen
] = '\0';
6988 /* This is freed during event handling. */
6989 event
->ws
.value
.execd_pathname
= xstrdup (pathname
);
6990 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
6992 /* Skip the registers included in this packet, since
6993 they may be for an architecture different from the
6994 one used by the original program. */
6997 else if (strprefix (p
, p1
, "create"))
6999 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
7000 p
= strchrnul (p1
+ 1, ';');
7009 p
= strchrnul (p1
+ 1, ';');
7014 /* Maybe a real ``P'' register number. */
7015 p_temp
= unpack_varlen_hex (p
, &pnum
);
7016 /* If the first invalid character is the colon, we got a
7017 register number. Otherwise, it's an unknown stop
7021 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
7022 cached_reg_t cached_reg
;
7023 struct gdbarch
*gdbarch
= target_gdbarch ();
7026 error (_("Remote sent bad register number %s: %s\n\
7028 hex_string (pnum
), p
, buf
);
7030 cached_reg
.num
= reg
->regnum
;
7031 cached_reg
.data
= (gdb_byte
*)
7032 xmalloc (register_size (gdbarch
, reg
->regnum
));
7035 fieldsize
= hex2bin (p
, cached_reg
.data
,
7036 register_size (gdbarch
, reg
->regnum
));
7038 if (fieldsize
< register_size (gdbarch
, reg
->regnum
))
7039 warning (_("Remote reply is too short: %s"), buf
);
7041 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
7045 /* Not a number. Silently skip unknown optional
7047 p
= strchrnul (p1
+ 1, ';');
7052 error (_("Remote register badly formatted: %s\nhere: %s"),
7057 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7061 case 'S': /* Old style status, just signal only. */
7065 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7066 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7067 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7068 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7070 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7073 case 'w': /* Thread exited. */
7078 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7079 p
= unpack_varlen_hex (&buf
[1], &value
);
7080 event
->ws
.value
.integer
= value
;
7082 error (_("stop reply packet badly formatted: %s"), buf
);
7083 event
->ptid
= read_ptid (++p
, NULL
);
7086 case 'W': /* Target exited. */
7093 /* GDB used to accept only 2 hex chars here. Stubs should
7094 only send more if they detect GDB supports multi-process
7096 p
= unpack_varlen_hex (&buf
[1], &value
);
7100 /* The remote process exited. */
7101 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7102 event
->ws
.value
.integer
= value
;
7106 /* The remote process exited with a signal. */
7107 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7108 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7109 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7111 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7114 /* If no process is specified, assume inferior_ptid. */
7115 pid
= ptid_get_pid (inferior_ptid
);
7124 else if (startswith (p
, "process:"))
7128 p
+= sizeof ("process:") - 1;
7129 unpack_varlen_hex (p
, &upid
);
7133 error (_("unknown stop reply packet: %s"), buf
);
7136 error (_("unknown stop reply packet: %s"), buf
);
7137 event
->ptid
= pid_to_ptid (pid
);
7141 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7142 event
->ptid
= minus_one_ptid
;
7146 if (target_is_non_stop_p () && ptid_equal (event
->ptid
, null_ptid
))
7147 error (_("No process or thread specified in stop reply: %s"), buf
);
7150 /* When the stub wants to tell GDB about a new notification reply, it
7151 sends a notification (%Stop, for example). Those can come it at
7152 any time, hence, we have to make sure that any pending
7153 putpkt/getpkt sequence we're making is finished, before querying
7154 the stub for more events with the corresponding ack command
7155 (vStopped, for example). E.g., if we started a vStopped sequence
7156 immediately upon receiving the notification, something like this
7164 1.6) <-- (registers reply to step #1.3)
7166 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7169 To solve this, whenever we parse a %Stop notification successfully,
7170 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7171 doing whatever we were doing:
7177 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7178 2.5) <-- (registers reply to step #2.3)
7180 Eventualy after step #2.5, we return to the event loop, which
7181 notices there's an event on the
7182 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7183 associated callback --- the function below. At this point, we're
7184 always safe to start a vStopped sequence. :
7187 2.7) <-- T05 thread:2
7193 remote_notif_get_pending_events (struct notif_client
*nc
)
7195 struct remote_state
*rs
= get_remote_state ();
7197 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7200 fprintf_unfiltered (gdb_stdlog
,
7201 "notif: process: '%s' ack pending event\n",
7205 nc
->ack (nc
, rs
->buf
, rs
->notif_state
->pending_event
[nc
->id
]);
7206 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7210 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7211 if (strcmp (rs
->buf
, "OK") == 0)
7214 remote_notif_ack (nc
, rs
->buf
);
7220 fprintf_unfiltered (gdb_stdlog
,
7221 "notif: process: '%s' no pending reply\n",
7226 /* Called when it is decided that STOP_REPLY holds the info of the
7227 event that is to be returned to the core. This function always
7228 destroys STOP_REPLY. */
7231 process_stop_reply (struct stop_reply
*stop_reply
,
7232 struct target_waitstatus
*status
)
7236 *status
= stop_reply
->ws
;
7237 ptid
= stop_reply
->ptid
;
7239 /* If no thread/process was reported by the stub, assume the current
7241 if (ptid_equal (ptid
, null_ptid
))
7242 ptid
= inferior_ptid
;
7244 if (status
->kind
!= TARGET_WAITKIND_EXITED
7245 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7246 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7248 struct private_thread_info
*remote_thr
;
7250 /* Expedited registers. */
7251 if (stop_reply
->regcache
)
7253 struct regcache
*regcache
7254 = get_thread_arch_regcache (ptid
, target_gdbarch ());
7259 VEC_iterate (cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
7262 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
7266 VEC_free (cached_reg_t
, stop_reply
->regcache
);
7269 remote_notice_new_inferior (ptid
, 0);
7270 remote_thr
= get_private_info_ptid (ptid
);
7271 remote_thr
->core
= stop_reply
->core
;
7272 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7273 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7274 remote_thr
->vcont_resumed
= 0;
7277 stop_reply_xfree (stop_reply
);
7281 /* The non-stop mode version of target_wait. */
7284 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7286 struct remote_state
*rs
= get_remote_state ();
7287 struct stop_reply
*stop_reply
;
7291 /* If in non-stop mode, get out of getpkt even if a
7292 notification is received. */
7294 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7295 0 /* forever */, &is_notif
);
7298 if (ret
!= -1 && !is_notif
)
7301 case 'E': /* Error of some sort. */
7302 /* We're out of sync with the target now. Did it continue
7303 or not? We can't tell which thread it was in non-stop,
7304 so just ignore this. */
7305 warning (_("Remote failure reply: %s"), rs
->buf
);
7307 case 'O': /* Console output. */
7308 remote_console_output (rs
->buf
+ 1);
7311 warning (_("Invalid remote reply: %s"), rs
->buf
);
7315 /* Acknowledge a pending stop reply that may have arrived in the
7317 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7318 remote_notif_get_pending_events (¬if_client_stop
);
7320 /* If indeed we noticed a stop reply, we're done. */
7321 stop_reply
= queued_stop_reply (ptid
);
7322 if (stop_reply
!= NULL
)
7323 return process_stop_reply (stop_reply
, status
);
7325 /* Still no event. If we're just polling for an event, then
7326 return to the event loop. */
7327 if (options
& TARGET_WNOHANG
)
7329 status
->kind
= TARGET_WAITKIND_IGNORE
;
7330 return minus_one_ptid
;
7333 /* Otherwise do a blocking wait. */
7334 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7335 1 /* forever */, &is_notif
);
7339 /* Wait until the remote machine stops, then return, storing status in
7340 STATUS just as `wait' would. */
7343 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7345 struct remote_state
*rs
= get_remote_state ();
7346 ptid_t event_ptid
= null_ptid
;
7348 struct stop_reply
*stop_reply
;
7352 status
->kind
= TARGET_WAITKIND_IGNORE
;
7353 status
->value
.integer
= 0;
7355 stop_reply
= queued_stop_reply (ptid
);
7356 if (stop_reply
!= NULL
)
7357 return process_stop_reply (stop_reply
, status
);
7359 if (rs
->cached_wait_status
)
7360 /* Use the cached wait status, but only once. */
7361 rs
->cached_wait_status
= 0;
7366 int forever
= ((options
& TARGET_WNOHANG
) == 0
7367 && wait_forever_enabled_p
);
7369 if (!rs
->waiting_for_stop_reply
)
7371 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7372 return minus_one_ptid
;
7375 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7376 _never_ wait for ever -> test on target_is_async_p().
7377 However, before we do that we need to ensure that the caller
7378 knows how to take the target into/out of async mode. */
7379 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7380 forever
, &is_notif
);
7382 /* GDB gets a notification. Return to core as this event is
7384 if (ret
!= -1 && is_notif
)
7385 return minus_one_ptid
;
7387 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7388 return minus_one_ptid
;
7393 /* Assume that the target has acknowledged Ctrl-C unless we receive
7394 an 'F' or 'O' packet. */
7395 if (buf
[0] != 'F' && buf
[0] != 'O')
7396 rs
->ctrlc_pending_p
= 0;
7400 case 'E': /* Error of some sort. */
7401 /* We're out of sync with the target now. Did it continue or
7402 not? Not is more likely, so report a stop. */
7403 rs
->waiting_for_stop_reply
= 0;
7405 warning (_("Remote failure reply: %s"), buf
);
7406 status
->kind
= TARGET_WAITKIND_STOPPED
;
7407 status
->value
.sig
= GDB_SIGNAL_0
;
7409 case 'F': /* File-I/O request. */
7410 /* GDB may access the inferior memory while handling the File-I/O
7411 request, but we don't want GDB accessing memory while waiting
7412 for a stop reply. See the comments in putpkt_binary. Set
7413 waiting_for_stop_reply to 0 temporarily. */
7414 rs
->waiting_for_stop_reply
= 0;
7415 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
7416 rs
->ctrlc_pending_p
= 0;
7417 /* GDB handled the File-I/O request, and the target is running
7418 again. Keep waiting for events. */
7419 rs
->waiting_for_stop_reply
= 1;
7421 case 'N': case 'T': case 'S': case 'X': case 'W':
7423 struct stop_reply
*stop_reply
;
7425 /* There is a stop reply to handle. */
7426 rs
->waiting_for_stop_reply
= 0;
7429 = (struct stop_reply
*) remote_notif_parse (¬if_client_stop
,
7432 event_ptid
= process_stop_reply (stop_reply
, status
);
7435 case 'O': /* Console output. */
7436 remote_console_output (buf
+ 1);
7439 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7441 /* Zero length reply means that we tried 'S' or 'C' and the
7442 remote system doesn't support it. */
7443 target_terminal::ours_for_output ();
7445 ("Can't send signals to this remote system. %s not sent.\n",
7446 gdb_signal_to_name (rs
->last_sent_signal
));
7447 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7448 target_terminal::inferior ();
7450 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7454 /* else fallthrough */
7456 warning (_("Invalid remote reply: %s"), buf
);
7460 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7461 return minus_one_ptid
;
7462 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7464 /* Nothing interesting happened. If we're doing a non-blocking
7465 poll, we're done. Otherwise, go back to waiting. */
7466 if (options
& TARGET_WNOHANG
)
7467 return minus_one_ptid
;
7471 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7472 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7474 if (!ptid_equal (event_ptid
, null_ptid
))
7475 record_currthread (rs
, event_ptid
);
7477 event_ptid
= inferior_ptid
;
7480 /* A process exit. Invalidate our notion of current thread. */
7481 record_currthread (rs
, minus_one_ptid
);
7486 /* Wait until the remote machine stops, then return, storing status in
7487 STATUS just as `wait' would. */
7490 remote_wait (struct target_ops
*ops
,
7491 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7495 if (target_is_non_stop_p ())
7496 event_ptid
= remote_wait_ns (ptid
, status
, options
);
7498 event_ptid
= remote_wait_as (ptid
, status
, options
);
7500 if (target_is_async_p ())
7502 /* If there are are events left in the queue tell the event loop
7504 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
7505 mark_async_event_handler (remote_async_inferior_event_token
);
7511 /* Fetch a single register using a 'p' packet. */
7514 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
7516 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
7517 struct remote_state
*rs
= get_remote_state ();
7519 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7522 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
7525 if (reg
->pnum
== -1)
7530 p
+= hexnumstr (p
, reg
->pnum
);
7533 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7537 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
7541 case PACKET_UNKNOWN
:
7544 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7545 gdbarch_register_name (get_regcache_arch (regcache
),
7550 /* If this register is unfetchable, tell the regcache. */
7553 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7557 /* Otherwise, parse and supply the value. */
7563 error (_("fetch_register_using_p: early buf termination"));
7565 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7568 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
7572 /* Fetch the registers included in the target's 'g' packet. */
7575 send_g_packet (void)
7577 struct remote_state
*rs
= get_remote_state ();
7580 xsnprintf (rs
->buf
, get_remote_packet_size (), "g");
7581 remote_send (&rs
->buf
, &rs
->buf_size
);
7583 /* We can get out of synch in various cases. If the first character
7584 in the buffer is not a hex character, assume that has happened
7585 and try to fetch another packet to read. */
7586 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
7587 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
7588 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
7589 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
7592 fprintf_unfiltered (gdb_stdlog
,
7593 "Bad register packet; fetching a new packet\n");
7594 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7597 buf_len
= strlen (rs
->buf
);
7599 /* Sanity check the received packet. */
7600 if (buf_len
% 2 != 0)
7601 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
7607 process_g_packet (struct regcache
*regcache
)
7609 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
7610 struct remote_state
*rs
= get_remote_state ();
7611 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7616 buf_len
= strlen (rs
->buf
);
7618 /* Further sanity checks, with knowledge of the architecture. */
7619 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
7620 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
7621 "bytes): %s"), rsa
->sizeof_g_packet
, buf_len
/ 2, rs
->buf
);
7623 /* Save the size of the packet sent to us by the target. It is used
7624 as a heuristic when determining the max size of packets that the
7625 target can safely receive. */
7626 if (rsa
->actual_register_packet_size
== 0)
7627 rsa
->actual_register_packet_size
= buf_len
;
7629 /* If this is smaller than we guessed the 'g' packet would be,
7630 update our records. A 'g' reply that doesn't include a register's
7631 value implies either that the register is not available, or that
7632 the 'p' packet must be used. */
7633 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
7635 long sizeof_g_packet
= buf_len
/ 2;
7637 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7639 long offset
= rsa
->regs
[i
].offset
;
7640 long reg_size
= register_size (gdbarch
, i
);
7642 if (rsa
->regs
[i
].pnum
== -1)
7645 if (offset
>= sizeof_g_packet
)
7646 rsa
->regs
[i
].in_g_packet
= 0;
7647 else if (offset
+ reg_size
> sizeof_g_packet
)
7648 error (_("Truncated register %d in remote 'g' packet"), i
);
7650 rsa
->regs
[i
].in_g_packet
= 1;
7653 /* Looks valid enough, we can assume this is the correct length
7654 for a 'g' packet. It's important not to adjust
7655 rsa->sizeof_g_packet if we have truncated registers otherwise
7656 this "if" won't be run the next time the method is called
7657 with a packet of the same size and one of the internal errors
7658 below will trigger instead. */
7659 rsa
->sizeof_g_packet
= sizeof_g_packet
;
7662 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
7664 /* Unimplemented registers read as all bits zero. */
7665 memset (regs
, 0, rsa
->sizeof_g_packet
);
7667 /* Reply describes registers byte by byte, each byte encoded as two
7668 hex characters. Suck them all up, then supply them to the
7669 register cacheing/storage mechanism. */
7672 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
7674 if (p
[0] == 0 || p
[1] == 0)
7675 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7676 internal_error (__FILE__
, __LINE__
,
7677 _("unexpected end of 'g' packet reply"));
7679 if (p
[0] == 'x' && p
[1] == 'x')
7680 regs
[i
] = 0; /* 'x' */
7682 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7686 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7688 struct packet_reg
*r
= &rsa
->regs
[i
];
7689 long reg_size
= register_size (gdbarch
, i
);
7693 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
))
7694 /* This shouldn't happen - we adjusted in_g_packet above. */
7695 internal_error (__FILE__
, __LINE__
,
7696 _("unexpected end of 'g' packet reply"));
7697 else if (rs
->buf
[r
->offset
* 2] == 'x')
7699 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
7700 /* The register isn't available, mark it as such (at
7701 the same time setting the value to zero). */
7702 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
7705 regcache_raw_supply (regcache
, r
->regnum
,
7712 fetch_registers_using_g (struct regcache
*regcache
)
7715 process_g_packet (regcache
);
7718 /* Make the remote selected traceframe match GDB's selected
7722 set_remote_traceframe (void)
7725 struct remote_state
*rs
= get_remote_state ();
7727 if (rs
->remote_traceframe_number
== get_traceframe_number ())
7730 /* Avoid recursion, remote_trace_find calls us again. */
7731 rs
->remote_traceframe_number
= get_traceframe_number ();
7733 newnum
= target_trace_find (tfind_number
,
7734 get_traceframe_number (), 0, 0, NULL
);
7736 /* Should not happen. If it does, all bets are off. */
7737 if (newnum
!= get_traceframe_number ())
7738 warning (_("could not set remote traceframe"));
7742 remote_fetch_registers (struct target_ops
*ops
,
7743 struct regcache
*regcache
, int regnum
)
7745 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7748 set_remote_traceframe ();
7749 set_general_thread (regcache_get_ptid (regcache
));
7753 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
7755 gdb_assert (reg
!= NULL
);
7757 /* If this register might be in the 'g' packet, try that first -
7758 we are likely to read more than one register. If this is the
7759 first 'g' packet, we might be overly optimistic about its
7760 contents, so fall back to 'p'. */
7761 if (reg
->in_g_packet
)
7763 fetch_registers_using_g (regcache
);
7764 if (reg
->in_g_packet
)
7768 if (fetch_register_using_p (regcache
, reg
))
7771 /* This register is not available. */
7772 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7777 fetch_registers_using_g (regcache
);
7779 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7780 if (!rsa
->regs
[i
].in_g_packet
)
7781 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
7783 /* This register is not available. */
7784 regcache_raw_supply (regcache
, i
, NULL
);
7788 /* Prepare to store registers. Since we may send them all (using a
7789 'G' request), we have to read out the ones we don't want to change
7793 remote_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
7795 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7798 /* Make sure the entire registers array is valid. */
7799 switch (packet_support (PACKET_P
))
7801 case PACKET_DISABLE
:
7802 case PACKET_SUPPORT_UNKNOWN
:
7803 /* Make sure all the necessary registers are cached. */
7804 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7805 if (rsa
->regs
[i
].in_g_packet
)
7806 regcache_raw_update (regcache
, rsa
->regs
[i
].regnum
);
7813 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7814 packet was not recognized. */
7817 store_register_using_P (const struct regcache
*regcache
,
7818 struct packet_reg
*reg
)
7820 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
7821 struct remote_state
*rs
= get_remote_state ();
7822 /* Try storing a single register. */
7823 char *buf
= rs
->buf
;
7824 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7827 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
7830 if (reg
->pnum
== -1)
7833 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
7834 p
= buf
+ strlen (buf
);
7835 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
7836 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
7838 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7840 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
7845 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7846 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
7847 case PACKET_UNKNOWN
:
7850 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
7854 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7855 contents of the register cache buffer. FIXME: ignores errors. */
7858 store_registers_using_G (const struct regcache
*regcache
)
7860 struct remote_state
*rs
= get_remote_state ();
7861 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7865 /* Extract all the registers in the regcache copying them into a
7870 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
7871 memset (regs
, 0, rsa
->sizeof_g_packet
);
7872 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7874 struct packet_reg
*r
= &rsa
->regs
[i
];
7877 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
7881 /* Command describes registers byte by byte,
7882 each byte encoded as two hex characters. */
7885 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
7887 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7888 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7889 error (_("Could not write registers; remote failure reply '%s'"),
7893 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7894 of the register cache buffer. FIXME: ignores errors. */
7897 remote_store_registers (struct target_ops
*ops
,
7898 struct regcache
*regcache
, int regnum
)
7900 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7903 set_remote_traceframe ();
7904 set_general_thread (regcache_get_ptid (regcache
));
7908 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
7910 gdb_assert (reg
!= NULL
);
7912 /* Always prefer to store registers using the 'P' packet if
7913 possible; we often change only a small number of registers.
7914 Sometimes we change a larger number; we'd need help from a
7915 higher layer to know to use 'G'. */
7916 if (store_register_using_P (regcache
, reg
))
7919 /* For now, don't complain if we have no way to write the
7920 register. GDB loses track of unavailable registers too
7921 easily. Some day, this may be an error. We don't have
7922 any way to read the register, either... */
7923 if (!reg
->in_g_packet
)
7926 store_registers_using_G (regcache
);
7930 store_registers_using_G (regcache
);
7932 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7933 if (!rsa
->regs
[i
].in_g_packet
)
7934 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
7935 /* See above for why we do not issue an error here. */
7940 /* Return the number of hex digits in num. */
7943 hexnumlen (ULONGEST num
)
7947 for (i
= 0; num
!= 0; i
++)
7950 return std::max (i
, 1);
7953 /* Set BUF to the minimum number of hex digits representing NUM. */
7956 hexnumstr (char *buf
, ULONGEST num
)
7958 int len
= hexnumlen (num
);
7960 return hexnumnstr (buf
, num
, len
);
7964 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7967 hexnumnstr (char *buf
, ULONGEST num
, int width
)
7973 for (i
= width
- 1; i
>= 0; i
--)
7975 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
7982 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7985 remote_address_masked (CORE_ADDR addr
)
7987 unsigned int address_size
= remote_address_size
;
7989 /* If "remoteaddresssize" was not set, default to target address size. */
7991 address_size
= gdbarch_addr_bit (target_gdbarch ());
7993 if (address_size
> 0
7994 && address_size
< (sizeof (ULONGEST
) * 8))
7996 /* Only create a mask when that mask can safely be constructed
7997 in a ULONGEST variable. */
8000 mask
= (mask
<< address_size
) - 1;
8006 /* Determine whether the remote target supports binary downloading.
8007 This is accomplished by sending a no-op memory write of zero length
8008 to the target at the specified address. It does not suffice to send
8009 the whole packet, since many stubs strip the eighth bit and
8010 subsequently compute a wrong checksum, which causes real havoc with
8013 NOTE: This can still lose if the serial line is not eight-bit
8014 clean. In cases like this, the user should clear "remote
8018 check_binary_download (CORE_ADDR addr
)
8020 struct remote_state
*rs
= get_remote_state ();
8022 switch (packet_support (PACKET_X
))
8024 case PACKET_DISABLE
:
8028 case PACKET_SUPPORT_UNKNOWN
:
8034 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8036 p
+= hexnumstr (p
, (ULONGEST
) 0);
8040 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8041 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8043 if (rs
->buf
[0] == '\0')
8046 fprintf_unfiltered (gdb_stdlog
,
8047 "binary downloading NOT "
8048 "supported by target\n");
8049 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8054 fprintf_unfiltered (gdb_stdlog
,
8055 "binary downloading supported by target\n");
8056 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8063 /* Helper function to resize the payload in order to try to get a good
8064 alignment. We try to write an amount of data such that the next write will
8065 start on an address aligned on REMOTE_ALIGN_WRITES. */
8068 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8070 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8073 /* Write memory data directly to the remote machine.
8074 This does not inform the data cache; the data cache uses this.
8075 HEADER is the starting part of the packet.
8076 MEMADDR is the address in the remote memory space.
8077 MYADDR is the address of the buffer in our space.
8078 LEN_UNITS is the number of addressable units to write.
8079 UNIT_SIZE is the length in bytes of an addressable unit.
8080 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8081 should send data as binary ('X'), or hex-encoded ('M').
8083 The function creates packet of the form
8084 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8086 where encoding of <DATA> is terminated by PACKET_FORMAT.
8088 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8091 Return the transferred status, error or OK (an
8092 'enum target_xfer_status' value). Save the number of addressable units
8093 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8095 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8096 exchange between gdb and the stub could look like (?? in place of the
8102 -> $M1000,3:eeeeffffeeee#??
8106 <- eeeeffffeeeedddd */
8108 static enum target_xfer_status
8109 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8110 const gdb_byte
*myaddr
, ULONGEST len_units
,
8111 int unit_size
, ULONGEST
*xfered_len_units
,
8112 char packet_format
, int use_length
)
8114 struct remote_state
*rs
= get_remote_state ();
8120 int payload_capacity_bytes
;
8121 int payload_length_bytes
;
8123 if (packet_format
!= 'X' && packet_format
!= 'M')
8124 internal_error (__FILE__
, __LINE__
,
8125 _("remote_write_bytes_aux: bad packet format"));
8128 return TARGET_XFER_EOF
;
8130 payload_capacity_bytes
= get_memory_write_packet_size ();
8132 /* The packet buffer will be large enough for the payload;
8133 get_memory_packet_size ensures this. */
8136 /* Compute the size of the actual payload by subtracting out the
8137 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8139 payload_capacity_bytes
-= strlen ("$,:#NN");
8141 /* The comma won't be used. */
8142 payload_capacity_bytes
+= 1;
8143 payload_capacity_bytes
-= strlen (header
);
8144 payload_capacity_bytes
-= hexnumlen (memaddr
);
8146 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8148 strcat (rs
->buf
, header
);
8149 p
= rs
->buf
+ strlen (header
);
8151 /* Compute a best guess of the number of bytes actually transfered. */
8152 if (packet_format
== 'X')
8154 /* Best guess at number of bytes that will fit. */
8155 todo_units
= std::min (len_units
,
8156 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8158 payload_capacity_bytes
-= hexnumlen (todo_units
);
8159 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8163 /* Number of bytes that will fit. */
8165 = std::min (len_units
,
8166 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8168 payload_capacity_bytes
-= hexnumlen (todo_units
);
8169 todo_units
= std::min (todo_units
,
8170 (payload_capacity_bytes
/ unit_size
) / 2);
8173 if (todo_units
<= 0)
8174 internal_error (__FILE__
, __LINE__
,
8175 _("minimum packet size too small to write data"));
8177 /* If we already need another packet, then try to align the end
8178 of this packet to a useful boundary. */
8179 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8180 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8182 /* Append "<memaddr>". */
8183 memaddr
= remote_address_masked (memaddr
);
8184 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8191 /* Append the length and retain its location and size. It may need to be
8192 adjusted once the packet body has been created. */
8194 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8202 /* Append the packet body. */
8203 if (packet_format
== 'X')
8205 /* Binary mode. Send target system values byte by byte, in
8206 increasing byte addresses. Only escape certain critical
8208 payload_length_bytes
=
8209 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8210 &units_written
, payload_capacity_bytes
);
8212 /* If not all TODO units fit, then we'll need another packet. Make
8213 a second try to keep the end of the packet aligned. Don't do
8214 this if the packet is tiny. */
8215 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8219 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8221 if (new_todo_units
!= units_written
)
8222 payload_length_bytes
=
8223 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8224 (gdb_byte
*) p
, &units_written
,
8225 payload_capacity_bytes
);
8228 p
+= payload_length_bytes
;
8229 if (use_length
&& units_written
< todo_units
)
8231 /* Escape chars have filled up the buffer prematurely,
8232 and we have actually sent fewer units than planned.
8233 Fix-up the length field of the packet. Use the same
8234 number of characters as before. */
8235 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8237 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8242 /* Normal mode: Send target system values byte by byte, in
8243 increasing byte addresses. Each byte is encoded as a two hex
8245 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8246 units_written
= todo_units
;
8249 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8250 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8252 if (rs
->buf
[0] == 'E')
8253 return TARGET_XFER_E_IO
;
8255 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8256 send fewer units than we'd planned. */
8257 *xfered_len_units
= (ULONGEST
) units_written
;
8258 return TARGET_XFER_OK
;
8261 /* Write memory data directly to the remote machine.
8262 This does not inform the data cache; the data cache uses this.
8263 MEMADDR is the address in the remote memory space.
8264 MYADDR is the address of the buffer in our space.
8265 LEN is the number of bytes.
8267 Return the transferred status, error or OK (an
8268 'enum target_xfer_status' value). Save the number of bytes
8269 transferred in *XFERED_LEN. Only transfer a single packet. */
8271 static enum target_xfer_status
8272 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ULONGEST len
,
8273 int unit_size
, ULONGEST
*xfered_len
)
8275 const char *packet_format
= NULL
;
8277 /* Check whether the target supports binary download. */
8278 check_binary_download (memaddr
);
8280 switch (packet_support (PACKET_X
))
8283 packet_format
= "X";
8285 case PACKET_DISABLE
:
8286 packet_format
= "M";
8288 case PACKET_SUPPORT_UNKNOWN
:
8289 internal_error (__FILE__
, __LINE__
,
8290 _("remote_write_bytes: bad internal state"));
8292 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8295 return remote_write_bytes_aux (packet_format
,
8296 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8297 packet_format
[0], 1);
8300 /* Read memory data directly from the remote machine.
8301 This does not use the data cache; the data cache uses this.
8302 MEMADDR is the address in the remote memory space.
8303 MYADDR is the address of the buffer in our space.
8304 LEN_UNITS is the number of addressable memory units to read..
8305 UNIT_SIZE is the length in bytes of an addressable unit.
8307 Return the transferred status, error or OK (an
8308 'enum target_xfer_status' value). Save the number of bytes
8309 transferred in *XFERED_LEN_UNITS.
8311 See the comment of remote_write_bytes_aux for an example of
8312 memory read/write exchange between gdb and the stub. */
8314 static enum target_xfer_status
8315 remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ULONGEST len_units
,
8316 int unit_size
, ULONGEST
*xfered_len_units
)
8318 struct remote_state
*rs
= get_remote_state ();
8319 int buf_size_bytes
; /* Max size of packet output buffer. */
8324 buf_size_bytes
= get_memory_read_packet_size ();
8325 /* The packet buffer will be large enough for the payload;
8326 get_memory_packet_size ensures this. */
8328 /* Number of units that will fit. */
8329 todo_units
= std::min (len_units
,
8330 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8332 /* Construct "m"<memaddr>","<len>". */
8333 memaddr
= remote_address_masked (memaddr
);
8336 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8338 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8341 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8342 if (rs
->buf
[0] == 'E'
8343 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8344 && rs
->buf
[3] == '\0')
8345 return TARGET_XFER_E_IO
;
8346 /* Reply describes memory byte by byte, each byte encoded as two hex
8349 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8350 /* Return what we have. Let higher layers handle partial reads. */
8351 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8352 return TARGET_XFER_OK
;
8355 /* Using the set of read-only target sections of remote, read live
8358 For interface/parameters/return description see target.h,
8361 static enum target_xfer_status
8362 remote_xfer_live_readonly_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
8363 ULONGEST memaddr
, ULONGEST len
,
8364 int unit_size
, ULONGEST
*xfered_len
)
8366 struct target_section
*secp
;
8367 struct target_section_table
*table
;
8369 secp
= target_section_by_addr (ops
, memaddr
);
8371 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
8372 secp
->the_bfd_section
)
8375 struct target_section
*p
;
8376 ULONGEST memend
= memaddr
+ len
;
8378 table
= target_get_section_table (ops
);
8380 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8382 if (memaddr
>= p
->addr
)
8384 if (memend
<= p
->endaddr
)
8386 /* Entire transfer is within this section. */
8387 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8390 else if (memaddr
>= p
->endaddr
)
8392 /* This section ends before the transfer starts. */
8397 /* This section overlaps the transfer. Just do half. */
8398 len
= p
->endaddr
- memaddr
;
8399 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8406 return TARGET_XFER_EOF
;
8409 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8410 first if the requested memory is unavailable in traceframe.
8411 Otherwise, fall back to remote_read_bytes_1. */
8413 static enum target_xfer_status
8414 remote_read_bytes (struct target_ops
*ops
, CORE_ADDR memaddr
,
8415 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8416 ULONGEST
*xfered_len
)
8419 return TARGET_XFER_EOF
;
8421 if (get_traceframe_number () != -1)
8423 VEC(mem_range_s
) *available
;
8425 /* If we fail to get the set of available memory, then the
8426 target does not support querying traceframe info, and so we
8427 attempt reading from the traceframe anyway (assuming the
8428 target implements the old QTro packet then). */
8429 if (traceframe_available_memory (&available
, memaddr
, len
))
8431 struct cleanup
*old_chain
;
8433 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
), &available
);
8435 if (VEC_empty (mem_range_s
, available
)
8436 || VEC_index (mem_range_s
, available
, 0)->start
!= memaddr
)
8438 enum target_xfer_status res
;
8440 /* Don't read into the traceframe's available
8442 if (!VEC_empty (mem_range_s
, available
))
8444 LONGEST oldlen
= len
;
8446 len
= VEC_index (mem_range_s
, available
, 0)->start
- memaddr
;
8447 gdb_assert (len
<= oldlen
);
8450 do_cleanups (old_chain
);
8452 /* This goes through the topmost target again. */
8453 res
= remote_xfer_live_readonly_partial (ops
, myaddr
, memaddr
,
8454 len
, unit_size
, xfered_len
);
8455 if (res
== TARGET_XFER_OK
)
8456 return TARGET_XFER_OK
;
8459 /* No use trying further, we know some memory starting
8460 at MEMADDR isn't available. */
8462 return TARGET_XFER_UNAVAILABLE
;
8466 /* Don't try to read more than how much is available, in
8467 case the target implements the deprecated QTro packet to
8468 cater for older GDBs (the target's knowledge of read-only
8469 sections may be outdated by now). */
8470 len
= VEC_index (mem_range_s
, available
, 0)->length
;
8472 do_cleanups (old_chain
);
8476 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8481 /* Sends a packet with content determined by the printf format string
8482 FORMAT and the remaining arguments, then gets the reply. Returns
8483 whether the packet was a success, a failure, or unknown. */
8485 static enum packet_result
remote_send_printf (const char *format
, ...)
8486 ATTRIBUTE_PRINTF (1, 2);
8488 static enum packet_result
8489 remote_send_printf (const char *format
, ...)
8491 struct remote_state
*rs
= get_remote_state ();
8492 int max_size
= get_remote_packet_size ();
8495 va_start (ap
, format
);
8498 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
8499 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8501 if (putpkt (rs
->buf
) < 0)
8502 error (_("Communication problem with target."));
8505 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8507 return packet_check_result (rs
->buf
);
8510 /* Flash writing can take quite some time. We'll set
8511 effectively infinite timeout for flash operations.
8512 In future, we'll need to decide on a better approach. */
8513 static const int remote_flash_timeout
= 1000;
8516 remote_flash_erase (struct target_ops
*ops
,
8517 ULONGEST address
, LONGEST length
)
8519 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
8520 enum packet_result ret
;
8521 scoped_restore restore_timeout
8522 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8524 ret
= remote_send_printf ("vFlashErase:%s,%s",
8525 phex (address
, addr_size
),
8529 case PACKET_UNKNOWN
:
8530 error (_("Remote target does not support flash erase"));
8532 error (_("Error erasing flash with vFlashErase packet"));
8538 static enum target_xfer_status
8539 remote_flash_write (struct target_ops
*ops
, ULONGEST address
,
8540 ULONGEST length
, ULONGEST
*xfered_len
,
8541 const gdb_byte
*data
)
8543 scoped_restore restore_timeout
8544 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8545 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
8550 remote_flash_done (struct target_ops
*ops
)
8554 scoped_restore restore_timeout
8555 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8557 ret
= remote_send_printf ("vFlashDone");
8561 case PACKET_UNKNOWN
:
8562 error (_("Remote target does not support vFlashDone"));
8564 error (_("Error finishing flash operation"));
8571 remote_files_info (struct target_ops
*ignore
)
8573 puts_filtered ("Debugging a target over a serial line.\n");
8576 /* Stuff for dealing with the packets which are part of this protocol.
8577 See comment at top of file for details. */
8579 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8580 error to higher layers. Called when a serial error is detected.
8581 The exception message is STRING, followed by a colon and a blank,
8582 the system error message for errno at function entry and final dot
8583 for output compatibility with throw_perror_with_name. */
8586 unpush_and_perror (const char *string
)
8588 int saved_errno
= errno
;
8590 remote_unpush_target ();
8591 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
8592 safe_strerror (saved_errno
));
8595 /* Read a single character from the remote end. The current quit
8596 handler is overridden to avoid quitting in the middle of packet
8597 sequence, as that would break communication with the remote server.
8598 See remote_serial_quit_handler for more detail. */
8601 readchar (int timeout
)
8604 struct remote_state
*rs
= get_remote_state ();
8607 scoped_restore restore_quit
8608 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8610 rs
->got_ctrlc_during_io
= 0;
8612 ch
= serial_readchar (rs
->remote_desc
, timeout
);
8614 if (rs
->got_ctrlc_during_io
)
8621 switch ((enum serial_rc
) ch
)
8624 remote_unpush_target ();
8625 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
8628 unpush_and_perror (_("Remote communication error. "
8629 "Target disconnected."));
8631 case SERIAL_TIMEOUT
:
8637 /* Wrapper for serial_write that closes the target and throws if
8638 writing fails. The current quit handler is overridden to avoid
8639 quitting in the middle of packet sequence, as that would break
8640 communication with the remote server. See
8641 remote_serial_quit_handler for more detail. */
8644 remote_serial_write (const char *str
, int len
)
8646 struct remote_state
*rs
= get_remote_state ();
8648 scoped_restore restore_quit
8649 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8651 rs
->got_ctrlc_during_io
= 0;
8653 if (serial_write (rs
->remote_desc
, str
, len
))
8655 unpush_and_perror (_("Remote communication error. "
8656 "Target disconnected."));
8659 if (rs
->got_ctrlc_during_io
)
8663 /* Send the command in *BUF to the remote machine, and read the reply
8664 into *BUF. Report an error if we get an error reply. Resize
8665 *BUF using xrealloc if necessary to hold the result, and update
8669 remote_send (char **buf
,
8673 getpkt (buf
, sizeof_buf
, 0);
8675 if ((*buf
)[0] == 'E')
8676 error (_("Remote failure reply: %s"), *buf
);
8679 /* Return a string representing an escaped version of BUF, of len N.
8680 E.g. \n is converted to \\n, \t to \\t, etc. */
8683 escape_buffer (const char *buf
, int n
)
8687 stb
.putstrn (buf
, n
, '\\');
8688 return std::move (stb
.string ());
8691 /* Display a null-terminated packet on stdout, for debugging, using C
8695 print_packet (const char *buf
)
8697 puts_filtered ("\"");
8698 fputstr_filtered (buf
, '"', gdb_stdout
);
8699 puts_filtered ("\"");
8703 putpkt (const char *buf
)
8705 return putpkt_binary (buf
, strlen (buf
));
8708 /* Send a packet to the remote machine, with error checking. The data
8709 of the packet is in BUF. The string in BUF can be at most
8710 get_remote_packet_size () - 5 to account for the $, # and checksum,
8711 and for a possible /0 if we are debugging (remote_debug) and want
8712 to print the sent packet as a string. */
8715 putpkt_binary (const char *buf
, int cnt
)
8717 struct remote_state
*rs
= get_remote_state ();
8719 unsigned char csum
= 0;
8720 char *buf2
= (char *) xmalloc (cnt
+ 6);
8721 struct cleanup
*old_chain
= make_cleanup (xfree
, buf2
);
8727 /* Catch cases like trying to read memory or listing threads while
8728 we're waiting for a stop reply. The remote server wouldn't be
8729 ready to handle this request, so we'd hang and timeout. We don't
8730 have to worry about this in synchronous mode, because in that
8731 case it's not possible to issue a command while the target is
8732 running. This is not a problem in non-stop mode, because in that
8733 case, the stub is always ready to process serial input. */
8734 if (!target_is_non_stop_p ()
8735 && target_is_async_p ()
8736 && rs
->waiting_for_stop_reply
)
8738 error (_("Cannot execute this command while the target is running.\n"
8739 "Use the \"interrupt\" command to stop the target\n"
8740 "and then try again."));
8743 /* We're sending out a new packet. Make sure we don't look at a
8744 stale cached response. */
8745 rs
->cached_wait_status
= 0;
8747 /* Copy the packet into buffer BUF2, encapsulating it
8748 and giving it a checksum. */
8753 for (i
= 0; i
< cnt
; i
++)
8759 *p
++ = tohex ((csum
>> 4) & 0xf);
8760 *p
++ = tohex (csum
& 0xf);
8762 /* Send it over and over until we get a positive ack. */
8766 int started_error_output
= 0;
8772 int len
= (int) (p
- buf2
);
8775 = escape_buffer (buf2
, std::min (len
, REMOTE_DEBUG_MAX_CHAR
));
8777 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
8779 if (str
.length () > REMOTE_DEBUG_MAX_CHAR
)
8781 fprintf_unfiltered (gdb_stdlog
, "[%zu bytes omitted]",
8782 str
.length () - REMOTE_DEBUG_MAX_CHAR
);
8785 fprintf_unfiltered (gdb_stdlog
, "...");
8787 gdb_flush (gdb_stdlog
);
8789 remote_serial_write (buf2
, p
- buf2
);
8791 /* If this is a no acks version of the remote protocol, send the
8792 packet and move on. */
8796 /* Read until either a timeout occurs (-2) or '+' is read.
8797 Handle any notification that arrives in the mean time. */
8800 ch
= readchar (remote_timeout
);
8808 case SERIAL_TIMEOUT
:
8811 if (started_error_output
)
8813 putchar_unfiltered ('\n');
8814 started_error_output
= 0;
8823 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
8824 do_cleanups (old_chain
);
8828 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
8830 case SERIAL_TIMEOUT
:
8834 do_cleanups (old_chain
);
8837 break; /* Retransmit buffer. */
8841 fprintf_unfiltered (gdb_stdlog
,
8842 "Packet instead of Ack, ignoring it\n");
8843 /* It's probably an old response sent because an ACK
8844 was lost. Gobble up the packet and ack it so it
8845 doesn't get retransmitted when we resend this
8848 remote_serial_write ("+", 1);
8849 continue; /* Now, go look for +. */
8856 /* If we got a notification, handle it, and go back to looking
8858 /* We've found the start of a notification. Now
8859 collect the data. */
8860 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
8865 std::string str
= escape_buffer (rs
->buf
, val
);
8867 fprintf_unfiltered (gdb_stdlog
,
8868 " Notification received: %s\n",
8871 handle_notification (rs
->notif_state
, rs
->buf
);
8872 /* We're in sync now, rewait for the ack. */
8879 if (!started_error_output
)
8881 started_error_output
= 1;
8882 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8884 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8885 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
8894 if (!started_error_output
)
8896 started_error_output
= 1;
8897 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8899 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8903 break; /* Here to retransmit. */
8907 /* This is wrong. If doing a long backtrace, the user should be
8908 able to get out next time we call QUIT, without anything as
8909 violent as interrupt_query. If we want to provide a way out of
8910 here without getting to the next QUIT, it should be based on
8911 hitting ^C twice as in remote_wait. */
8920 do_cleanups (old_chain
);
8924 /* Come here after finding the start of a frame when we expected an
8925 ack. Do our best to discard the rest of this packet. */
8934 c
= readchar (remote_timeout
);
8937 case SERIAL_TIMEOUT
:
8938 /* Nothing we can do. */
8941 /* Discard the two bytes of checksum and stop. */
8942 c
= readchar (remote_timeout
);
8944 c
= readchar (remote_timeout
);
8947 case '*': /* Run length encoding. */
8948 /* Discard the repeat count. */
8949 c
= readchar (remote_timeout
);
8954 /* A regular character. */
8960 /* Come here after finding the start of the frame. Collect the rest
8961 into *BUF, verifying the checksum, length, and handling run-length
8962 compression. NUL terminate the buffer. If there is not enough room,
8963 expand *BUF using xrealloc.
8965 Returns -1 on error, number of characters in buffer (ignoring the
8966 trailing NULL) on success. (could be extended to return one of the
8967 SERIAL status indications). */
8970 read_frame (char **buf_p
,
8977 struct remote_state
*rs
= get_remote_state ();
8984 c
= readchar (remote_timeout
);
8987 case SERIAL_TIMEOUT
:
8989 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
8993 fputs_filtered ("Saw new packet start in middle of old one\n",
8995 return -1; /* Start a new packet, count retries. */
8998 unsigned char pktcsum
;
9004 check_0
= readchar (remote_timeout
);
9006 check_1
= readchar (remote_timeout
);
9008 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9011 fputs_filtered ("Timeout in checksum, retrying\n",
9015 else if (check_0
< 0 || check_1
< 0)
9018 fputs_filtered ("Communication error in checksum\n",
9023 /* Don't recompute the checksum; with no ack packets we
9024 don't have any way to indicate a packet retransmission
9029 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9030 if (csum
== pktcsum
)
9035 std::string str
= escape_buffer (buf
, bc
);
9037 fprintf_unfiltered (gdb_stdlog
,
9038 "Bad checksum, sentsum=0x%x, "
9039 "csum=0x%x, buf=%s\n",
9040 pktcsum
, csum
, str
.c_str ());
9042 /* Number of characters in buffer ignoring trailing
9046 case '*': /* Run length encoding. */
9051 c
= readchar (remote_timeout
);
9053 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9055 /* The character before ``*'' is repeated. */
9057 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9059 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
9061 /* Make some more room in the buffer. */
9062 *sizeof_buf
+= repeat
;
9063 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9067 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9073 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9077 if (bc
>= *sizeof_buf
- 1)
9079 /* Make some more room in the buffer. */
9081 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9092 /* Read a packet from the remote machine, with error checking, and
9093 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9094 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9095 rather than timing out; this is used (in synchronous mode) to wait
9096 for a target that is is executing user code to stop. */
9097 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9098 don't have to change all the calls to getpkt to deal with the
9099 return value, because at the moment I don't know what the right
9100 thing to do it for those. */
9106 getpkt_sane (buf
, sizeof_buf
, forever
);
9110 /* Read a packet from the remote machine, with error checking, and
9111 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9112 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9113 rather than timing out; this is used (in synchronous mode) to wait
9114 for a target that is is executing user code to stop. If FOREVER ==
9115 0, this function is allowed to time out gracefully and return an
9116 indication of this to the caller. Otherwise return the number of
9117 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9118 enough reason to return to the caller. *IS_NOTIF is an output
9119 boolean that indicates whether *BUF holds a notification or not
9120 (a regular packet). */
9123 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
9124 int expecting_notif
, int *is_notif
)
9126 struct remote_state
*rs
= get_remote_state ();
9132 /* We're reading a new response. Make sure we don't look at a
9133 previously cached response. */
9134 rs
->cached_wait_status
= 0;
9136 strcpy (*buf
, "timeout");
9139 timeout
= watchdog
> 0 ? watchdog
: -1;
9140 else if (expecting_notif
)
9141 timeout
= 0; /* There should already be a char in the buffer. If
9144 timeout
= remote_timeout
;
9148 /* Process any number of notifications, and then return when
9152 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9154 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9156 /* This can loop forever if the remote side sends us
9157 characters continuously, but if it pauses, we'll get
9158 SERIAL_TIMEOUT from readchar because of timeout. Then
9159 we'll count that as a retry.
9161 Note that even when forever is set, we will only wait
9162 forever prior to the start of a packet. After that, we
9163 expect characters to arrive at a brisk pace. They should
9164 show up within remote_timeout intervals. */
9166 c
= readchar (timeout
);
9167 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9169 if (c
== SERIAL_TIMEOUT
)
9171 if (expecting_notif
)
9172 return -1; /* Don't complain, it's normal to not get
9173 anything in this case. */
9175 if (forever
) /* Watchdog went off? Kill the target. */
9177 remote_unpush_target ();
9178 throw_error (TARGET_CLOSE_ERROR
,
9179 _("Watchdog timeout has expired. "
9180 "Target detached."));
9183 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9187 /* We've found the start of a packet or notification.
9188 Now collect the data. */
9189 val
= read_frame (buf
, sizeof_buf
);
9194 remote_serial_write ("-", 1);
9197 if (tries
> MAX_TRIES
)
9199 /* We have tried hard enough, and just can't receive the
9200 packet/notification. Give up. */
9201 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9203 /* Skip the ack char if we're in no-ack mode. */
9204 if (!rs
->noack_mode
)
9205 remote_serial_write ("+", 1);
9209 /* If we got an ordinary packet, return that to our caller. */
9215 = escape_buffer (*buf
,
9216 std::min (val
, REMOTE_DEBUG_MAX_CHAR
));
9218 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9221 if (str
.length () > REMOTE_DEBUG_MAX_CHAR
)
9223 fprintf_unfiltered (gdb_stdlog
, "[%zu bytes omitted]",
9224 str
.length () - REMOTE_DEBUG_MAX_CHAR
);
9227 fprintf_unfiltered (gdb_stdlog
, "\n");
9230 /* Skip the ack char if we're in no-ack mode. */
9231 if (!rs
->noack_mode
)
9232 remote_serial_write ("+", 1);
9233 if (is_notif
!= NULL
)
9238 /* If we got a notification, handle it, and go back to looking
9242 gdb_assert (c
== '%');
9246 std::string str
= escape_buffer (*buf
, val
);
9248 fprintf_unfiltered (gdb_stdlog
,
9249 " Notification received: %s\n",
9252 if (is_notif
!= NULL
)
9255 handle_notification (rs
->notif_state
, *buf
);
9257 /* Notifications require no acknowledgement. */
9259 if (expecting_notif
)
9266 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
9268 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0, NULL
);
9272 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
9275 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1,
9279 /* Check whether EVENT is a fork event for the process specified
9280 by the pid passed in DATA, and if it is, kill the fork child. */
9283 kill_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
9284 QUEUE_ITER (stop_reply_p
) *iter
,
9288 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
9289 int parent_pid
= *(int *) param
->input
;
9291 if (is_pending_fork_parent (&event
->ws
, parent_pid
, event
->ptid
))
9293 struct remote_state
*rs
= get_remote_state ();
9294 int child_pid
= ptid_get_pid (event
->ws
.value
.related_pid
);
9297 res
= remote_vkill (child_pid
, rs
);
9299 error (_("Can't kill fork child process %d"), child_pid
);
9305 /* Kill any new fork children of process PID that haven't been
9306 processed by follow_fork. */
9309 kill_new_fork_children (int pid
, struct remote_state
*rs
)
9311 struct thread_info
*thread
;
9312 struct notif_client
*notif
= ¬if_client_stop
;
9313 struct queue_iter_param param
;
9315 /* Kill the fork child threads of any threads in process PID
9316 that are stopped at a fork event. */
9317 ALL_NON_EXITED_THREADS (thread
)
9319 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9321 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9323 struct remote_state
*rs
= get_remote_state ();
9324 int child_pid
= ptid_get_pid (ws
->value
.related_pid
);
9327 res
= remote_vkill (child_pid
, rs
);
9329 error (_("Can't kill fork child process %d"), child_pid
);
9333 /* Check for any pending fork events (not reported or processed yet)
9334 in process PID and kill those fork child threads as well. */
9335 remote_notif_get_pending_events (notif
);
9337 param
.output
= NULL
;
9338 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
9339 kill_child_of_pending_fork
, ¶m
);
9343 /* Target hook to kill the current inferior. */
9346 remote_kill (struct target_ops
*ops
)
9349 int pid
= ptid_get_pid (inferior_ptid
);
9350 struct remote_state
*rs
= get_remote_state ();
9352 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9354 /* If we're stopped while forking and we haven't followed yet,
9355 kill the child task. We need to do this before killing the
9356 parent task because if this is a vfork then the parent will
9358 kill_new_fork_children (pid
, rs
);
9360 res
= remote_vkill (pid
, rs
);
9363 target_mourn_inferior (inferior_ptid
);
9368 /* If we are in 'target remote' mode and we are killing the only
9369 inferior, then we will tell gdbserver to exit and unpush the
9371 if (res
== -1 && !remote_multi_process_p (rs
)
9372 && number_of_live_inferiors () == 1)
9376 /* We've killed the remote end, we get to mourn it. If we are
9377 not in extended mode, mourning the inferior also unpushes
9378 remote_ops from the target stack, which closes the remote
9380 target_mourn_inferior (inferior_ptid
);
9385 error (_("Can't kill process"));
9388 /* Send a kill request to the target using the 'vKill' packet. */
9391 remote_vkill (int pid
, struct remote_state
*rs
)
9393 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9396 /* Tell the remote target to detach. */
9397 xsnprintf (rs
->buf
, get_remote_packet_size (), "vKill;%x", pid
);
9399 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9401 switch (packet_ok (rs
->buf
,
9402 &remote_protocol_packets
[PACKET_vKill
]))
9408 case PACKET_UNKNOWN
:
9411 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9415 /* Send a kill request to the target using the 'k' packet. */
9418 remote_kill_k (void)
9420 /* Catch errors so the user can quit from gdb even when we
9421 aren't on speaking terms with the remote system. */
9426 CATCH (ex
, RETURN_MASK_ERROR
)
9428 if (ex
.error
== TARGET_CLOSE_ERROR
)
9430 /* If we got an (EOF) error that caused the target
9431 to go away, then we're done, that's what we wanted.
9432 "k" is susceptible to cause a premature EOF, given
9433 that the remote server isn't actually required to
9434 reply to "k", and it can happen that it doesn't
9435 even get to reply ACK to the "k". */
9439 /* Otherwise, something went wrong. We didn't actually kill
9440 the target. Just propagate the exception, and let the
9441 user or higher layers decide what to do. */
9442 throw_exception (ex
);
9448 remote_mourn (struct target_ops
*target
)
9450 struct remote_state
*rs
= get_remote_state ();
9452 /* In 'target remote' mode with one inferior, we close the connection. */
9453 if (!rs
->extended
&& number_of_live_inferiors () <= 1)
9455 unpush_target (target
);
9457 /* remote_close takes care of doing most of the clean up. */
9458 generic_mourn_inferior ();
9462 /* In case we got here due to an error, but we're going to stay
9464 rs
->waiting_for_stop_reply
= 0;
9466 /* If the current general thread belonged to the process we just
9467 detached from or has exited, the remote side current general
9468 thread becomes undefined. Considering a case like this:
9470 - We just got here due to a detach.
9471 - The process that we're detaching from happens to immediately
9472 report a global breakpoint being hit in non-stop mode, in the
9473 same thread we had selected before.
9474 - GDB attaches to this process again.
9475 - This event happens to be the next event we handle.
9477 GDB would consider that the current general thread didn't need to
9478 be set on the stub side (with Hg), since for all it knew,
9479 GENERAL_THREAD hadn't changed.
9481 Notice that although in all-stop mode, the remote server always
9482 sets the current thread to the thread reporting the stop event,
9483 that doesn't happen in non-stop mode; in non-stop, the stub *must
9484 not* change the current thread when reporting a breakpoint hit,
9485 due to the decoupling of event reporting and event handling.
9487 To keep things simple, we always invalidate our notion of the
9489 record_currthread (rs
, minus_one_ptid
);
9491 /* Call common code to mark the inferior as not running. */
9492 generic_mourn_inferior ();
9494 if (!have_inferiors ())
9496 if (!remote_multi_process_p (rs
))
9498 /* Check whether the target is running now - some remote stubs
9499 automatically restart after kill. */
9501 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9503 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
9505 /* Assume that the target has been restarted. Set
9506 inferior_ptid so that bits of core GDB realizes
9507 there's something here, e.g., so that the user can
9508 say "kill" again. */
9509 inferior_ptid
= magic_null_ptid
;
9516 extended_remote_supports_disable_randomization (struct target_ops
*self
)
9518 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9522 extended_remote_disable_randomization (int val
)
9524 struct remote_state
*rs
= get_remote_state ();
9527 xsnprintf (rs
->buf
, get_remote_packet_size (), "QDisableRandomization:%x",
9530 reply
= remote_get_noisy_reply ();
9532 error (_("Target does not support QDisableRandomization."));
9533 if (strcmp (reply
, "OK") != 0)
9534 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
9538 extended_remote_run (const std::string
&args
)
9540 struct remote_state
*rs
= get_remote_state ();
9542 const char *remote_exec_file
= get_remote_exec_file ();
9544 /* If the user has disabled vRun support, or we have detected that
9545 support is not available, do not try it. */
9546 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
9549 strcpy (rs
->buf
, "vRun;");
9550 len
= strlen (rs
->buf
);
9552 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
9553 error (_("Remote file name too long for run packet"));
9554 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
,
9555 strlen (remote_exec_file
));
9561 gdb_argv
argv (args
.c_str ());
9562 for (i
= 0; argv
[i
] != NULL
; i
++)
9564 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
9565 error (_("Argument list too long for run packet"));
9566 rs
->buf
[len
++] = ';';
9567 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
,
9572 rs
->buf
[len
++] = '\0';
9575 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9577 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
9580 /* We have a wait response. All is well. */
9582 case PACKET_UNKNOWN
:
9585 if (remote_exec_file
[0] == '\0')
9586 error (_("Running the default executable on the remote target failed; "
9587 "try \"set remote exec-file\"?"));
9589 error (_("Running \"%s\" on the remote target failed"),
9592 gdb_assert_not_reached (_("bad switch"));
9596 /* Helper function to send set/unset environment packets. ACTION is
9597 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9598 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9602 send_environment_packet (struct remote_state
*rs
,
9607 /* Convert the environment variable to an hex string, which
9608 is the best format to be transmitted over the wire. */
9609 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
9612 xsnprintf (rs
->buf
, get_remote_packet_size (),
9613 "%s:%s", packet
, encoded_value
.c_str ());
9616 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9617 if (strcmp (rs
->buf
, "OK") != 0)
9618 warning (_("Unable to %s environment variable '%s' on remote."),
9622 /* Helper function to handle the QEnvironment* packets. */
9625 extended_remote_environment_support (struct remote_state
*rs
)
9627 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
9629 putpkt ("QEnvironmentReset");
9630 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9631 if (strcmp (rs
->buf
, "OK") != 0)
9632 warning (_("Unable to reset environment on remote."));
9635 gdb_environ
*e
= ¤t_inferior ()->environment
;
9637 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
9638 for (const std::string
&el
: e
->user_set_env ())
9639 send_environment_packet (rs
, "set", "QEnvironmentHexEncoded",
9642 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
9643 for (const std::string
&el
: e
->user_unset_env ())
9644 send_environment_packet (rs
, "unset", "QEnvironmentUnset", el
.c_str ());
9647 /* Helper function to set the current working directory for the
9648 inferior in the remote target. */
9651 extended_remote_set_inferior_cwd (struct remote_state
*rs
)
9653 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
9655 const char *inferior_cwd
= get_inferior_cwd ();
9657 if (inferior_cwd
!= NULL
)
9659 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
9660 strlen (inferior_cwd
));
9662 xsnprintf (rs
->buf
, get_remote_packet_size (),
9663 "QSetWorkingDir:%s", hexpath
.c_str ());
9667 /* An empty inferior_cwd means that the user wants us to
9668 reset the remote server's inferior's cwd. */
9669 xsnprintf (rs
->buf
, get_remote_packet_size (),
9674 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9675 if (packet_ok (rs
->buf
,
9676 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
9679 Remote replied unexpectedly while setting the inferior's working\n\
9686 /* In the extended protocol we want to be able to do things like
9687 "run" and have them basically work as expected. So we need
9688 a special create_inferior function. We support changing the
9689 executable file and the command line arguments, but not the
9693 extended_remote_create_inferior (struct target_ops
*ops
,
9694 const char *exec_file
,
9695 const std::string
&args
,
9696 char **env
, int from_tty
)
9700 struct remote_state
*rs
= get_remote_state ();
9701 const char *remote_exec_file
= get_remote_exec_file ();
9703 /* If running asynchronously, register the target file descriptor
9704 with the event loop. */
9705 if (target_can_async_p ())
9708 /* Disable address space randomization if requested (and supported). */
9709 if (extended_remote_supports_disable_randomization (ops
))
9710 extended_remote_disable_randomization (disable_randomization
);
9712 /* If startup-with-shell is on, we inform gdbserver to start the
9713 remote inferior using a shell. */
9714 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
9716 xsnprintf (rs
->buf
, get_remote_packet_size (),
9717 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
9719 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9720 if (strcmp (rs
->buf
, "OK") != 0)
9722 Remote replied unexpectedly while setting startup-with-shell: %s"),
9726 extended_remote_environment_support (rs
);
9728 extended_remote_set_inferior_cwd (rs
);
9730 /* Now restart the remote server. */
9731 run_worked
= extended_remote_run (args
) != -1;
9734 /* vRun was not supported. Fail if we need it to do what the
9736 if (remote_exec_file
[0])
9737 error (_("Remote target does not support \"set remote exec-file\""));
9739 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9741 /* Fall back to "R". */
9742 extended_remote_restart ();
9745 if (!have_inferiors ())
9747 /* Clean up from the last time we ran, before we mark the target
9748 running again. This will mark breakpoints uninserted, and
9749 get_offsets may insert breakpoints. */
9750 init_thread_list ();
9751 init_wait_for_inferior ();
9754 /* vRun's success return is a stop reply. */
9755 stop_reply
= run_worked
? rs
->buf
: NULL
;
9756 add_current_inferior_and_thread (stop_reply
);
9758 /* Get updated offsets, if the stub uses qOffsets. */
9763 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9764 the list of conditions (in agent expression bytecode format), if any, the
9765 target needs to evaluate. The output is placed into the packet buffer
9766 started from BUF and ended at BUF_END. */
9769 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
9770 struct bp_target_info
*bp_tgt
, char *buf
,
9773 if (bp_tgt
->conditions
.empty ())
9776 buf
+= strlen (buf
);
9777 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
9780 /* Send conditions to the target. */
9781 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
9783 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
9784 buf
+= strlen (buf
);
9785 for (int i
= 0; i
< aexpr
->len
; ++i
)
9786 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9793 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
9794 struct bp_target_info
*bp_tgt
, char *buf
)
9796 if (bp_tgt
->tcommands
.empty ())
9799 buf
+= strlen (buf
);
9801 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
9802 buf
+= strlen (buf
);
9804 /* Concatenate all the agent expressions that are commands into the
9806 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
9808 sprintf (buf
, "X%x,", aexpr
->len
);
9809 buf
+= strlen (buf
);
9810 for (int i
= 0; i
< aexpr
->len
; ++i
)
9811 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9816 /* Insert a breakpoint. On targets that have software breakpoint
9817 support, we ask the remote target to do the work; on targets
9818 which don't, we insert a traditional memory breakpoint. */
9821 remote_insert_breakpoint (struct target_ops
*ops
,
9822 struct gdbarch
*gdbarch
,
9823 struct bp_target_info
*bp_tgt
)
9825 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9826 If it succeeds, then set the support to PACKET_ENABLE. If it
9827 fails, and the user has explicitly requested the Z support then
9828 report an error, otherwise, mark it disabled and go on. */
9830 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9832 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
9833 struct remote_state
*rs
;
9837 /* Make sure the remote is pointing at the right process, if
9839 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9840 set_general_process ();
9842 rs
= get_remote_state ();
9844 endbuf
= rs
->buf
+ get_remote_packet_size ();
9849 addr
= (ULONGEST
) remote_address_masked (addr
);
9850 p
+= hexnumstr (p
, addr
);
9851 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9853 if (remote_supports_cond_breakpoints (ops
))
9854 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
9856 if (remote_can_run_breakpoint_commands (ops
))
9857 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
9860 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9862 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
9868 case PACKET_UNKNOWN
:
9873 /* If this breakpoint has target-side commands but this stub doesn't
9874 support Z0 packets, throw error. */
9875 if (!bp_tgt
->tcommands
.empty ())
9876 throw_error (NOT_SUPPORTED_ERROR
, _("\
9877 Target doesn't support breakpoints that have target side commands."));
9879 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
9883 remote_remove_breakpoint (struct target_ops
*ops
,
9884 struct gdbarch
*gdbarch
,
9885 struct bp_target_info
*bp_tgt
,
9886 enum remove_bp_reason reason
)
9888 CORE_ADDR addr
= bp_tgt
->placed_address
;
9889 struct remote_state
*rs
= get_remote_state ();
9891 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9894 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9896 /* Make sure the remote is pointing at the right process, if
9898 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9899 set_general_process ();
9905 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
9906 p
+= hexnumstr (p
, addr
);
9907 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9910 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9912 return (rs
->buf
[0] == 'E');
9915 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
, reason
);
9918 static enum Z_packet_type
9919 watchpoint_to_Z_packet (int type
)
9924 return Z_PACKET_WRITE_WP
;
9927 return Z_PACKET_READ_WP
;
9930 return Z_PACKET_ACCESS_WP
;
9933 internal_error (__FILE__
, __LINE__
,
9934 _("hw_bp_to_z: bad watchpoint type %d"), type
);
9939 remote_insert_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9940 enum target_hw_bp_type type
, struct expression
*cond
)
9942 struct remote_state
*rs
= get_remote_state ();
9943 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9945 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9947 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9950 /* Make sure the remote is pointing at the right process, if
9952 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9953 set_general_process ();
9955 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "Z%x,", packet
);
9956 p
= strchr (rs
->buf
, '\0');
9957 addr
= remote_address_masked (addr
);
9958 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9959 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9962 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9964 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9968 case PACKET_UNKNOWN
:
9973 internal_error (__FILE__
, __LINE__
,
9974 _("remote_insert_watchpoint: reached end of function"));
9978 remote_watchpoint_addr_within_range (struct target_ops
*target
, CORE_ADDR addr
,
9979 CORE_ADDR start
, int length
)
9981 CORE_ADDR diff
= remote_address_masked (addr
- start
);
9983 return diff
< length
;
9988 remote_remove_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9989 enum target_hw_bp_type type
, struct expression
*cond
)
9991 struct remote_state
*rs
= get_remote_state ();
9992 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9994 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9996 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9999 /* Make sure the remote is pointing at the right process, if
10001 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10002 set_general_process ();
10004 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "z%x,", packet
);
10005 p
= strchr (rs
->buf
, '\0');
10006 addr
= remote_address_masked (addr
);
10007 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10008 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10010 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10012 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10015 case PACKET_UNKNOWN
:
10020 internal_error (__FILE__
, __LINE__
,
10021 _("remote_remove_watchpoint: reached end of function"));
10025 int remote_hw_watchpoint_limit
= -1;
10026 int remote_hw_watchpoint_length_limit
= -1;
10027 int remote_hw_breakpoint_limit
= -1;
10030 remote_region_ok_for_hw_watchpoint (struct target_ops
*self
,
10031 CORE_ADDR addr
, int len
)
10033 if (remote_hw_watchpoint_length_limit
== 0)
10035 else if (remote_hw_watchpoint_length_limit
< 0)
10037 else if (len
<= remote_hw_watchpoint_length_limit
)
10044 remote_check_watch_resources (struct target_ops
*self
,
10045 enum bptype type
, int cnt
, int ot
)
10047 if (type
== bp_hardware_breakpoint
)
10049 if (remote_hw_breakpoint_limit
== 0)
10051 else if (remote_hw_breakpoint_limit
< 0)
10053 else if (cnt
<= remote_hw_breakpoint_limit
)
10058 if (remote_hw_watchpoint_limit
== 0)
10060 else if (remote_hw_watchpoint_limit
< 0)
10064 else if (cnt
<= remote_hw_watchpoint_limit
)
10070 /* The to_stopped_by_sw_breakpoint method of target remote. */
10073 remote_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10075 struct thread_info
*thread
= inferior_thread ();
10077 return (thread
->priv
!= NULL
10078 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_SW_BREAKPOINT
);
10081 /* The to_supports_stopped_by_sw_breakpoint method of target
10085 remote_supports_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10087 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10090 /* The to_stopped_by_hw_breakpoint method of target remote. */
10093 remote_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10095 struct thread_info
*thread
= inferior_thread ();
10097 return (thread
->priv
!= NULL
10098 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_HW_BREAKPOINT
);
10101 /* The to_supports_stopped_by_hw_breakpoint method of target
10105 remote_supports_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10107 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10111 remote_stopped_by_watchpoint (struct target_ops
*ops
)
10113 struct thread_info
*thread
= inferior_thread ();
10115 return (thread
->priv
!= NULL
10116 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_WATCHPOINT
);
10120 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
10122 struct thread_info
*thread
= inferior_thread ();
10124 if (thread
->priv
!= NULL
10125 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_WATCHPOINT
)
10127 *addr_p
= thread
->priv
->watch_data_address
;
10136 remote_insert_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10137 struct bp_target_info
*bp_tgt
)
10139 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10140 struct remote_state
*rs
;
10144 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10147 /* Make sure the remote is pointing at the right process, if
10149 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10150 set_general_process ();
10152 rs
= get_remote_state ();
10154 endbuf
= rs
->buf
+ get_remote_packet_size ();
10160 addr
= remote_address_masked (addr
);
10161 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10162 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10164 if (remote_supports_cond_breakpoints (self
))
10165 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10167 if (remote_can_run_breakpoint_commands (self
))
10168 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10171 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10173 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10176 if (rs
->buf
[1] == '.')
10178 message
= strchr (rs
->buf
+ 2, '.');
10180 error (_("Remote failure reply: %s"), message
+ 1);
10183 case PACKET_UNKNOWN
:
10188 internal_error (__FILE__
, __LINE__
,
10189 _("remote_insert_hw_breakpoint: reached end of function"));
10194 remote_remove_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10195 struct bp_target_info
*bp_tgt
)
10198 struct remote_state
*rs
= get_remote_state ();
10200 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10202 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10205 /* Make sure the remote is pointing at the right process, if
10207 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10208 set_general_process ();
10214 addr
= remote_address_masked (bp_tgt
->placed_address
);
10215 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10216 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10219 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10221 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10224 case PACKET_UNKNOWN
:
10229 internal_error (__FILE__
, __LINE__
,
10230 _("remote_remove_hw_breakpoint: reached end of function"));
10233 /* Verify memory using the "qCRC:" request. */
10236 remote_verify_memory (struct target_ops
*ops
,
10237 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10239 struct remote_state
*rs
= get_remote_state ();
10240 unsigned long host_crc
, target_crc
;
10243 /* It doesn't make sense to use qCRC if the remote target is
10244 connected but not running. */
10245 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10247 enum packet_result result
;
10249 /* Make sure the remote is pointing at the right process. */
10250 set_general_process ();
10252 /* FIXME: assumes lma can fit into long. */
10253 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
10254 (long) lma
, (long) size
);
10257 /* Be clever; compute the host_crc before waiting for target
10259 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10261 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10263 result
= packet_ok (rs
->buf
,
10264 &remote_protocol_packets
[PACKET_qCRC
]);
10265 if (result
== PACKET_ERROR
)
10267 else if (result
== PACKET_OK
)
10269 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10270 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10272 return (host_crc
== target_crc
);
10276 return simple_verify_memory (ops
, data
, lma
, size
);
10279 /* compare-sections command
10281 With no arguments, compares each loadable section in the exec bfd
10282 with the same memory range on the target, and reports mismatches.
10283 Useful for verifying the image on the target against the exec file. */
10286 compare_sections_command (const char *args
, int from_tty
)
10289 struct cleanup
*old_chain
;
10290 gdb_byte
*sectdata
;
10291 const char *sectname
;
10292 bfd_size_type size
;
10295 int mismatched
= 0;
10300 error (_("command cannot be used without an exec file"));
10302 /* Make sure the remote is pointing at the right process. */
10303 set_general_process ();
10305 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10311 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10313 if (!(s
->flags
& SEC_LOAD
))
10314 continue; /* Skip non-loadable section. */
10316 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10317 continue; /* Skip writeable sections */
10319 size
= bfd_get_section_size (s
);
10321 continue; /* Skip zero-length section. */
10323 sectname
= bfd_get_section_name (exec_bfd
, s
);
10324 if (args
&& strcmp (args
, sectname
) != 0)
10325 continue; /* Not the section selected by user. */
10327 matched
= 1; /* Do this section. */
10330 sectdata
= (gdb_byte
*) xmalloc (size
);
10331 old_chain
= make_cleanup (xfree
, sectdata
);
10332 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
10334 res
= target_verify_memory (sectdata
, lma
, size
);
10337 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10338 paddress (target_gdbarch (), lma
),
10339 paddress (target_gdbarch (), lma
+ size
));
10341 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10342 paddress (target_gdbarch (), lma
),
10343 paddress (target_gdbarch (), lma
+ size
));
10345 printf_filtered ("matched.\n");
10348 printf_filtered ("MIS-MATCHED!\n");
10352 do_cleanups (old_chain
);
10354 if (mismatched
> 0)
10355 warning (_("One or more sections of the target image does not match\n\
10356 the loaded file\n"));
10357 if (args
&& !matched
)
10358 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10361 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10362 into remote target. The number of bytes written to the remote
10363 target is returned, or -1 for error. */
10365 static enum target_xfer_status
10366 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
10367 const char *annex
, const gdb_byte
*writebuf
,
10368 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
,
10369 struct packet_config
*packet
)
10373 struct remote_state
*rs
= get_remote_state ();
10374 int max_size
= get_memory_write_packet_size ();
10376 if (packet
->support
== PACKET_DISABLE
)
10377 return TARGET_XFER_E_IO
;
10379 /* Insert header. */
10380 i
= snprintf (rs
->buf
, max_size
,
10381 "qXfer:%s:write:%s:%s:",
10382 object_name
, annex
? annex
: "",
10383 phex_nz (offset
, sizeof offset
));
10384 max_size
-= (i
+ 1);
10386 /* Escape as much data as fits into rs->buf. */
10387 buf_len
= remote_escape_output
10388 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
+ i
, &max_size
, max_size
);
10390 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
10391 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10392 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10393 return TARGET_XFER_E_IO
;
10395 unpack_varlen_hex (rs
->buf
, &n
);
10398 return TARGET_XFER_OK
;
10401 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10402 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10403 number of bytes read is returned, or 0 for EOF, or -1 for error.
10404 The number of bytes read may be less than LEN without indicating an
10405 EOF. PACKET is checked and updated to indicate whether the remote
10406 target supports this object. */
10408 static enum target_xfer_status
10409 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
10411 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
10412 ULONGEST
*xfered_len
,
10413 struct packet_config
*packet
)
10415 struct remote_state
*rs
= get_remote_state ();
10416 LONGEST i
, n
, packet_len
;
10418 if (packet
->support
== PACKET_DISABLE
)
10419 return TARGET_XFER_E_IO
;
10421 /* Check whether we've cached an end-of-object packet that matches
10423 if (rs
->finished_object
)
10425 if (strcmp (object_name
, rs
->finished_object
) == 0
10426 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10427 && offset
== rs
->finished_offset
)
10428 return TARGET_XFER_EOF
;
10431 /* Otherwise, we're now reading something different. Discard
10433 xfree (rs
->finished_object
);
10434 xfree (rs
->finished_annex
);
10435 rs
->finished_object
= NULL
;
10436 rs
->finished_annex
= NULL
;
10439 /* Request only enough to fit in a single packet. The actual data
10440 may not, since we don't know how much of it will need to be escaped;
10441 the target is free to respond with slightly less data. We subtract
10442 five to account for the response type and the protocol frame. */
10443 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10444 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10445 object_name
, annex
? annex
: "",
10446 phex_nz (offset
, sizeof offset
),
10447 phex_nz (n
, sizeof n
));
10448 i
= putpkt (rs
->buf
);
10450 return TARGET_XFER_E_IO
;
10453 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
10454 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10455 return TARGET_XFER_E_IO
;
10457 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10458 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
10460 /* 'm' means there is (or at least might be) more data after this
10461 batch. That does not make sense unless there's at least one byte
10462 of data in this reply. */
10463 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10464 error (_("Remote qXfer reply contained no data."));
10466 /* Got some data. */
10467 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
+ 1,
10468 packet_len
- 1, readbuf
, n
);
10470 /* 'l' is an EOF marker, possibly including a final block of data,
10471 or possibly empty. If we have the final block of a non-empty
10472 object, record this fact to bypass a subsequent partial read. */
10473 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10475 rs
->finished_object
= xstrdup (object_name
);
10476 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10477 rs
->finished_offset
= offset
+ i
;
10481 return TARGET_XFER_EOF
;
10485 return TARGET_XFER_OK
;
10489 static enum target_xfer_status
10490 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
10491 const char *annex
, gdb_byte
*readbuf
,
10492 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10493 ULONGEST
*xfered_len
)
10495 struct remote_state
*rs
;
10499 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10501 set_remote_traceframe ();
10502 set_general_thread (inferior_ptid
);
10504 rs
= get_remote_state ();
10506 /* Handle memory using the standard memory routines. */
10507 if (object
== TARGET_OBJECT_MEMORY
)
10509 /* If the remote target is connected but not running, we should
10510 pass this request down to a lower stratum (e.g. the executable
10512 if (!target_has_execution
)
10513 return TARGET_XFER_EOF
;
10515 if (writebuf
!= NULL
)
10516 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10519 return remote_read_bytes (ops
, offset
, readbuf
, len
, unit_size
,
10523 /* Handle SPU memory using qxfer packets. */
10524 if (object
== TARGET_OBJECT_SPU
)
10527 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
10528 xfered_len
, &remote_protocol_packets
10529 [PACKET_qXfer_spu_read
]);
10531 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
10532 xfered_len
, &remote_protocol_packets
10533 [PACKET_qXfer_spu_write
]);
10536 /* Handle extra signal info using qxfer packets. */
10537 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10540 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
10541 xfered_len
, &remote_protocol_packets
10542 [PACKET_qXfer_siginfo_read
]);
10544 return remote_write_qxfer (ops
, "siginfo", annex
,
10545 writebuf
, offset
, len
, xfered_len
,
10546 &remote_protocol_packets
10547 [PACKET_qXfer_siginfo_write
]);
10550 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10553 return remote_read_qxfer (ops
, "statictrace", annex
,
10554 readbuf
, offset
, len
, xfered_len
,
10555 &remote_protocol_packets
10556 [PACKET_qXfer_statictrace_read
]);
10558 return TARGET_XFER_E_IO
;
10561 /* Only handle flash writes. */
10562 if (writebuf
!= NULL
)
10566 case TARGET_OBJECT_FLASH
:
10567 return remote_flash_write (ops
, offset
, len
, xfered_len
,
10571 return TARGET_XFER_E_IO
;
10575 /* Map pre-existing objects onto letters. DO NOT do this for new
10576 objects!!! Instead specify new query packets. */
10579 case TARGET_OBJECT_AVR
:
10583 case TARGET_OBJECT_AUXV
:
10584 gdb_assert (annex
== NULL
);
10585 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
10587 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
10589 case TARGET_OBJECT_AVAILABLE_FEATURES
:
10590 return remote_read_qxfer
10591 (ops
, "features", annex
, readbuf
, offset
, len
, xfered_len
,
10592 &remote_protocol_packets
[PACKET_qXfer_features
]);
10594 case TARGET_OBJECT_LIBRARIES
:
10595 return remote_read_qxfer
10596 (ops
, "libraries", annex
, readbuf
, offset
, len
, xfered_len
,
10597 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
10599 case TARGET_OBJECT_LIBRARIES_SVR4
:
10600 return remote_read_qxfer
10601 (ops
, "libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
10602 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
10604 case TARGET_OBJECT_MEMORY_MAP
:
10605 gdb_assert (annex
== NULL
);
10606 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
10608 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
10610 case TARGET_OBJECT_OSDATA
:
10611 /* Should only get here if we're connected. */
10612 gdb_assert (rs
->remote_desc
);
10613 return remote_read_qxfer
10614 (ops
, "osdata", annex
, readbuf
, offset
, len
, xfered_len
,
10615 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
10617 case TARGET_OBJECT_THREADS
:
10618 gdb_assert (annex
== NULL
);
10619 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
10621 &remote_protocol_packets
[PACKET_qXfer_threads
]);
10623 case TARGET_OBJECT_TRACEFRAME_INFO
:
10624 gdb_assert (annex
== NULL
);
10625 return remote_read_qxfer
10626 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
10627 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
10629 case TARGET_OBJECT_FDPIC
:
10630 return remote_read_qxfer (ops
, "fdpic", annex
, readbuf
, offset
, len
,
10632 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
10634 case TARGET_OBJECT_OPENVMS_UIB
:
10635 return remote_read_qxfer (ops
, "uib", annex
, readbuf
, offset
, len
,
10637 &remote_protocol_packets
[PACKET_qXfer_uib
]);
10639 case TARGET_OBJECT_BTRACE
:
10640 return remote_read_qxfer (ops
, "btrace", annex
, readbuf
, offset
, len
,
10642 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
10644 case TARGET_OBJECT_BTRACE_CONF
:
10645 return remote_read_qxfer (ops
, "btrace-conf", annex
, readbuf
, offset
,
10647 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
10649 case TARGET_OBJECT_EXEC_FILE
:
10650 return remote_read_qxfer (ops
, "exec-file", annex
, readbuf
, offset
,
10652 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
10655 return TARGET_XFER_E_IO
;
10658 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10659 large enough let the caller deal with it. */
10660 if (len
< get_remote_packet_size ())
10661 return TARGET_XFER_E_IO
;
10662 len
= get_remote_packet_size ();
10664 /* Except for querying the minimum buffer size, target must be open. */
10665 if (!rs
->remote_desc
)
10666 error (_("remote query is only available after target open"));
10668 gdb_assert (annex
!= NULL
);
10669 gdb_assert (readbuf
!= NULL
);
10673 *p2
++ = query_type
;
10675 /* We used one buffer char for the remote protocol q command and
10676 another for the query type. As the remote protocol encapsulation
10677 uses 4 chars plus one extra in case we are debugging
10678 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10681 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
10683 /* Bad caller may have sent forbidden characters. */
10684 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
10689 gdb_assert (annex
[i
] == '\0');
10691 i
= putpkt (rs
->buf
);
10693 return TARGET_XFER_E_IO
;
10695 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10696 strcpy ((char *) readbuf
, rs
->buf
);
10698 *xfered_len
= strlen ((char *) readbuf
);
10699 return TARGET_XFER_OK
;
10702 /* Implementation of to_get_memory_xfer_limit. */
10705 remote_get_memory_xfer_limit (struct target_ops
*ops
)
10707 return get_memory_write_packet_size ();
10711 remote_search_memory (struct target_ops
* ops
,
10712 CORE_ADDR start_addr
, ULONGEST search_space_len
,
10713 const gdb_byte
*pattern
, ULONGEST pattern_len
,
10714 CORE_ADDR
*found_addrp
)
10716 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
10717 struct remote_state
*rs
= get_remote_state ();
10718 int max_size
= get_memory_write_packet_size ();
10719 struct packet_config
*packet
=
10720 &remote_protocol_packets
[PACKET_qSearch_memory
];
10721 /* Number of packet bytes used to encode the pattern;
10722 this could be more than PATTERN_LEN due to escape characters. */
10723 int escaped_pattern_len
;
10724 /* Amount of pattern that was encodable in the packet. */
10725 int used_pattern_len
;
10728 ULONGEST found_addr
;
10730 /* Don't go to the target if we don't have to.
10731 This is done before checking packet->support to avoid the possibility that
10732 a success for this edge case means the facility works in general. */
10733 if (pattern_len
> search_space_len
)
10735 if (pattern_len
== 0)
10737 *found_addrp
= start_addr
;
10741 /* If we already know the packet isn't supported, fall back to the simple
10742 way of searching memory. */
10744 if (packet_config_support (packet
) == PACKET_DISABLE
)
10746 /* Target doesn't provided special support, fall back and use the
10747 standard support (copy memory and do the search here). */
10748 return simple_search_memory (ops
, start_addr
, search_space_len
,
10749 pattern
, pattern_len
, found_addrp
);
10752 /* Make sure the remote is pointing at the right process. */
10753 set_general_process ();
10755 /* Insert header. */
10756 i
= snprintf (rs
->buf
, max_size
,
10757 "qSearch:memory:%s;%s;",
10758 phex_nz (start_addr
, addr_size
),
10759 phex_nz (search_space_len
, sizeof (search_space_len
)));
10760 max_size
-= (i
+ 1);
10762 /* Escape as much data as fits into rs->buf. */
10763 escaped_pattern_len
=
10764 remote_escape_output (pattern
, pattern_len
, 1, (gdb_byte
*) rs
->buf
+ i
,
10765 &used_pattern_len
, max_size
);
10767 /* Bail if the pattern is too large. */
10768 if (used_pattern_len
!= pattern_len
)
10769 error (_("Pattern is too large to transmit to remote target."));
10771 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
10772 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10773 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10775 /* The request may not have worked because the command is not
10776 supported. If so, fall back to the simple way. */
10777 if (packet
->support
== PACKET_DISABLE
)
10779 return simple_search_memory (ops
, start_addr
, search_space_len
,
10780 pattern
, pattern_len
, found_addrp
);
10785 if (rs
->buf
[0] == '0')
10787 else if (rs
->buf
[0] == '1')
10790 if (rs
->buf
[1] != ',')
10791 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10792 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
10793 *found_addrp
= found_addr
;
10796 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10802 remote_rcmd (struct target_ops
*self
, const char *command
,
10803 struct ui_file
*outbuf
)
10805 struct remote_state
*rs
= get_remote_state ();
10808 if (!rs
->remote_desc
)
10809 error (_("remote rcmd is only available after target open"));
10811 /* Send a NULL command across as an empty command. */
10812 if (command
== NULL
)
10815 /* The query prefix. */
10816 strcpy (rs
->buf
, "qRcmd,");
10817 p
= strchr (rs
->buf
, '\0');
10819 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
10820 > get_remote_packet_size ())
10821 error (_("\"monitor\" command ``%s'' is too long."), command
);
10823 /* Encode the actual command. */
10824 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
10826 if (putpkt (rs
->buf
) < 0)
10827 error (_("Communication problem with target."));
10829 /* get/display the response */
10834 /* XXX - see also remote_get_noisy_reply(). */
10835 QUIT
; /* Allow user to bail out with ^C. */
10837 if (getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) == -1)
10839 /* Timeout. Continue to (try to) read responses.
10840 This is better than stopping with an error, assuming the stub
10841 is still executing the (long) monitor command.
10842 If needed, the user can interrupt gdb using C-c, obtaining
10843 an effect similar to stop on timeout. */
10847 if (buf
[0] == '\0')
10848 error (_("Target does not support this command."));
10849 if (buf
[0] == 'O' && buf
[1] != 'K')
10851 remote_console_output (buf
+ 1); /* 'O' message from stub. */
10854 if (strcmp (buf
, "OK") == 0)
10856 if (strlen (buf
) == 3 && buf
[0] == 'E'
10857 && isdigit (buf
[1]) && isdigit (buf
[2]))
10859 error (_("Protocol error with Rcmd"));
10861 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
10863 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
10865 fputc_unfiltered (c
, outbuf
);
10871 static VEC(mem_region_s
) *
10872 remote_memory_map (struct target_ops
*ops
)
10874 VEC(mem_region_s
) *result
= NULL
;
10875 char *text
= target_read_stralloc (¤t_target
,
10876 TARGET_OBJECT_MEMORY_MAP
, NULL
);
10880 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
10882 result
= parse_memory_map (text
);
10883 do_cleanups (back_to
);
10890 packet_command (const char *args
, int from_tty
)
10892 struct remote_state
*rs
= get_remote_state ();
10894 if (!rs
->remote_desc
)
10895 error (_("command can only be used with remote target"));
10898 error (_("remote-packet command requires packet text as argument"));
10900 puts_filtered ("sending: ");
10901 print_packet (args
);
10902 puts_filtered ("\n");
10905 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10906 puts_filtered ("received: ");
10907 print_packet (rs
->buf
);
10908 puts_filtered ("\n");
10912 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10914 static void display_thread_info (struct gdb_ext_thread_info
*info
);
10916 static void threadset_test_cmd (char *cmd
, int tty
);
10918 static void threadalive_test (char *cmd
, int tty
);
10920 static void threadlist_test_cmd (char *cmd
, int tty
);
10922 int get_and_display_threadinfo (threadref
*ref
);
10924 static void threadinfo_test_cmd (char *cmd
, int tty
);
10926 static int thread_display_step (threadref
*ref
, void *context
);
10928 static void threadlist_update_test_cmd (char *cmd
, int tty
);
10930 static void init_remote_threadtests (void);
10932 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10935 threadset_test_cmd (char *cmd
, int tty
)
10937 int sample_thread
= SAMPLE_THREAD
;
10939 printf_filtered (_("Remote threadset test\n"));
10940 set_general_thread (sample_thread
);
10945 threadalive_test (char *cmd
, int tty
)
10947 int sample_thread
= SAMPLE_THREAD
;
10948 int pid
= ptid_get_pid (inferior_ptid
);
10949 ptid_t ptid
= ptid_build (pid
, sample_thread
, 0);
10951 if (remote_thread_alive (ptid
))
10952 printf_filtered ("PASS: Thread alive test\n");
10954 printf_filtered ("FAIL: Thread alive test\n");
10957 void output_threadid (char *title
, threadref
*ref
);
10960 output_threadid (char *title
, threadref
*ref
)
10964 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
10966 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
10970 threadlist_test_cmd (char *cmd
, int tty
)
10973 threadref nextthread
;
10974 int done
, result_count
;
10975 threadref threadlist
[3];
10977 printf_filtered ("Remote Threadlist test\n");
10978 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
10979 &result_count
, &threadlist
[0]))
10980 printf_filtered ("FAIL: threadlist test\n");
10983 threadref
*scan
= threadlist
;
10984 threadref
*limit
= scan
+ result_count
;
10986 while (scan
< limit
)
10987 output_threadid (" thread ", scan
++);
10992 display_thread_info (struct gdb_ext_thread_info
*info
)
10994 output_threadid ("Threadid: ", &info
->threadid
);
10995 printf_filtered ("Name: %s\n ", info
->shortname
);
10996 printf_filtered ("State: %s\n", info
->display
);
10997 printf_filtered ("other: %s\n\n", info
->more_display
);
11001 get_and_display_threadinfo (threadref
*ref
)
11005 struct gdb_ext_thread_info threadinfo
;
11007 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11008 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11009 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11010 display_thread_info (&threadinfo
);
11015 threadinfo_test_cmd (char *cmd
, int tty
)
11017 int athread
= SAMPLE_THREAD
;
11021 int_to_threadref (&thread
, athread
);
11022 printf_filtered ("Remote Threadinfo test\n");
11023 if (!get_and_display_threadinfo (&thread
))
11024 printf_filtered ("FAIL cannot get thread info\n");
11028 thread_display_step (threadref
*ref
, void *context
)
11030 /* output_threadid(" threadstep ",ref); *//* simple test */
11031 return get_and_display_threadinfo (ref
);
11035 threadlist_update_test_cmd (char *cmd
, int tty
)
11037 printf_filtered ("Remote Threadlist update test\n");
11038 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11042 init_remote_threadtests (void)
11044 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11045 _("Fetch and print the remote list of "
11046 "thread identifiers, one pkt only"));
11047 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11048 _("Fetch and display info about one thread"));
11049 add_com ("tset", class_obscure
, threadset_test_cmd
,
11050 _("Test setting to a different thread"));
11051 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11052 _("Iterate through updating all remote thread info"));
11053 add_com ("talive", class_obscure
, threadalive_test
,
11054 _(" Remote thread alive test "));
11059 /* Convert a thread ID to a string. Returns the string in a static
11062 static const char *
11063 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
11065 static char buf
[64];
11066 struct remote_state
*rs
= get_remote_state ();
11068 if (ptid_equal (ptid
, null_ptid
))
11069 return normal_pid_to_str (ptid
);
11070 else if (ptid_is_pid (ptid
))
11072 /* Printing an inferior target id. */
11074 /* When multi-process extensions are off, there's no way in the
11075 remote protocol to know the remote process id, if there's any
11076 at all. There's one exception --- when we're connected with
11077 target extended-remote, and we manually attached to a process
11078 with "attach PID". We don't record anywhere a flag that
11079 allows us to distinguish that case from the case of
11080 connecting with extended-remote and the stub already being
11081 attached to a process, and reporting yes to qAttached, hence
11082 no smart special casing here. */
11083 if (!remote_multi_process_p (rs
))
11085 xsnprintf (buf
, sizeof buf
, "Remote target");
11089 return normal_pid_to_str (ptid
);
11093 if (ptid_equal (magic_null_ptid
, ptid
))
11094 xsnprintf (buf
, sizeof buf
, "Thread <main>");
11095 else if (remote_multi_process_p (rs
))
11096 if (ptid_get_lwp (ptid
) == 0)
11097 return normal_pid_to_str (ptid
);
11099 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
11100 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
11102 xsnprintf (buf
, sizeof buf
, "Thread %ld",
11103 ptid_get_lwp (ptid
));
11108 /* Get the address of the thread local variable in OBJFILE which is
11109 stored at OFFSET within the thread local storage for thread PTID. */
11112 remote_get_thread_local_address (struct target_ops
*ops
,
11113 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
11115 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11117 struct remote_state
*rs
= get_remote_state ();
11119 char *endp
= rs
->buf
+ get_remote_packet_size ();
11120 enum packet_result result
;
11122 strcpy (p
, "qGetTLSAddr:");
11124 p
= write_ptid (p
, endp
, ptid
);
11126 p
+= hexnumstr (p
, offset
);
11128 p
+= hexnumstr (p
, lm
);
11132 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11133 result
= packet_ok (rs
->buf
,
11134 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11135 if (result
== PACKET_OK
)
11139 unpack_varlen_hex (rs
->buf
, &result
);
11142 else if (result
== PACKET_UNKNOWN
)
11143 throw_error (TLS_GENERIC_ERROR
,
11144 _("Remote target doesn't support qGetTLSAddr packet"));
11146 throw_error (TLS_GENERIC_ERROR
,
11147 _("Remote target failed to process qGetTLSAddr request"));
11150 throw_error (TLS_GENERIC_ERROR
,
11151 _("TLS not supported or disabled on this target"));
11156 /* Provide thread local base, i.e. Thread Information Block address.
11157 Returns 1 if ptid is found and thread_local_base is non zero. */
11160 remote_get_tib_address (struct target_ops
*self
, ptid_t ptid
, CORE_ADDR
*addr
)
11162 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11164 struct remote_state
*rs
= get_remote_state ();
11166 char *endp
= rs
->buf
+ get_remote_packet_size ();
11167 enum packet_result result
;
11169 strcpy (p
, "qGetTIBAddr:");
11171 p
= write_ptid (p
, endp
, ptid
);
11175 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11176 result
= packet_ok (rs
->buf
,
11177 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11178 if (result
== PACKET_OK
)
11182 unpack_varlen_hex (rs
->buf
, &result
);
11184 *addr
= (CORE_ADDR
) result
;
11187 else if (result
== PACKET_UNKNOWN
)
11188 error (_("Remote target doesn't support qGetTIBAddr packet"));
11190 error (_("Remote target failed to process qGetTIBAddr request"));
11193 error (_("qGetTIBAddr not supported or disabled on this target"));
11198 /* Support for inferring a target description based on the current
11199 architecture and the size of a 'g' packet. While the 'g' packet
11200 can have any size (since optional registers can be left off the
11201 end), some sizes are easily recognizable given knowledge of the
11202 approximate architecture. */
11204 struct remote_g_packet_guess
11207 const struct target_desc
*tdesc
;
11209 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
11210 DEF_VEC_O(remote_g_packet_guess_s
);
11212 struct remote_g_packet_data
11214 VEC(remote_g_packet_guess_s
) *guesses
;
11217 static struct gdbarch_data
*remote_g_packet_data_handle
;
11220 remote_g_packet_data_init (struct obstack
*obstack
)
11222 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
11226 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11227 const struct target_desc
*tdesc
)
11229 struct remote_g_packet_data
*data
11230 = ((struct remote_g_packet_data
*)
11231 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11232 struct remote_g_packet_guess new_guess
, *guess
;
11235 gdb_assert (tdesc
!= NULL
);
11238 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11240 if (guess
->bytes
== bytes
)
11241 internal_error (__FILE__
, __LINE__
,
11242 _("Duplicate g packet description added for size %d"),
11245 new_guess
.bytes
= bytes
;
11246 new_guess
.tdesc
= tdesc
;
11247 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
11250 /* Return 1 if remote_read_description would do anything on this target
11251 and architecture, 0 otherwise. */
11254 remote_read_description_p (struct target_ops
*target
)
11256 struct remote_g_packet_data
*data
11257 = ((struct remote_g_packet_data
*)
11258 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11260 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11266 static const struct target_desc
*
11267 remote_read_description (struct target_ops
*target
)
11269 struct remote_g_packet_data
*data
11270 = ((struct remote_g_packet_data
*)
11271 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11273 /* Do not try this during initial connection, when we do not know
11274 whether there is a running but stopped thread. */
11275 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
11276 return target
->beneath
->to_read_description (target
->beneath
);
11278 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11280 struct remote_g_packet_guess
*guess
;
11282 int bytes
= send_g_packet ();
11285 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11287 if (guess
->bytes
== bytes
)
11288 return guess
->tdesc
;
11290 /* We discard the g packet. A minor optimization would be to
11291 hold on to it, and fill the register cache once we have selected
11292 an architecture, but it's too tricky to do safely. */
11295 return target
->beneath
->to_read_description (target
->beneath
);
11298 /* Remote file transfer support. This is host-initiated I/O, not
11299 target-initiated; for target-initiated, see remote-fileio.c. */
11301 /* If *LEFT is at least the length of STRING, copy STRING to
11302 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11303 decrease *LEFT. Otherwise raise an error. */
11306 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11308 int len
= strlen (string
);
11311 error (_("Packet too long for target."));
11313 memcpy (*buffer
, string
, len
);
11317 /* NUL-terminate the buffer as a convenience, if there is
11323 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11324 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11325 decrease *LEFT. Otherwise raise an error. */
11328 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11331 if (2 * len
> *left
)
11332 error (_("Packet too long for target."));
11334 bin2hex (bytes
, *buffer
, len
);
11335 *buffer
+= 2 * len
;
11338 /* NUL-terminate the buffer as a convenience, if there is
11344 /* If *LEFT is large enough, convert VALUE to hex and add it to
11345 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11346 decrease *LEFT. Otherwise raise an error. */
11349 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11351 int len
= hexnumlen (value
);
11354 error (_("Packet too long for target."));
11356 hexnumstr (*buffer
, value
);
11360 /* NUL-terminate the buffer as a convenience, if there is
11366 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11367 value, *REMOTE_ERRNO to the remote error number or zero if none
11368 was included, and *ATTACHMENT to point to the start of the annex
11369 if any. The length of the packet isn't needed here; there may
11370 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11372 Return 0 if the packet could be parsed, -1 if it could not. If
11373 -1 is returned, the other variables may not be initialized. */
11376 remote_hostio_parse_result (char *buffer
, int *retcode
,
11377 int *remote_errno
, char **attachment
)
11382 *attachment
= NULL
;
11384 if (buffer
[0] != 'F')
11388 *retcode
= strtol (&buffer
[1], &p
, 16);
11389 if (errno
!= 0 || p
== &buffer
[1])
11392 /* Check for ",errno". */
11396 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11397 if (errno
!= 0 || p
+ 1 == p2
)
11402 /* Check for ";attachment". If there is no attachment, the
11403 packet should end here. */
11406 *attachment
= p
+ 1;
11409 else if (*p
== '\0')
11415 /* Send a prepared I/O packet to the target and read its response.
11416 The prepared packet is in the global RS->BUF before this function
11417 is called, and the answer is there when we return.
11419 COMMAND_BYTES is the length of the request to send, which may include
11420 binary data. WHICH_PACKET is the packet configuration to check
11421 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11422 is set to the error number and -1 is returned. Otherwise the value
11423 returned by the function is returned.
11425 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11426 attachment is expected; an error will be reported if there's a
11427 mismatch. If one is found, *ATTACHMENT will be set to point into
11428 the packet buffer and *ATTACHMENT_LEN will be set to the
11429 attachment's length. */
11432 remote_hostio_send_command (int command_bytes
, int which_packet
,
11433 int *remote_errno
, char **attachment
,
11434 int *attachment_len
)
11436 struct remote_state
*rs
= get_remote_state ();
11437 int ret
, bytes_read
;
11438 char *attachment_tmp
;
11440 if (!rs
->remote_desc
11441 || packet_support (which_packet
) == PACKET_DISABLE
)
11443 *remote_errno
= FILEIO_ENOSYS
;
11447 putpkt_binary (rs
->buf
, command_bytes
);
11448 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
11450 /* If it timed out, something is wrong. Don't try to parse the
11452 if (bytes_read
< 0)
11454 *remote_errno
= FILEIO_EINVAL
;
11458 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11461 *remote_errno
= FILEIO_EINVAL
;
11463 case PACKET_UNKNOWN
:
11464 *remote_errno
= FILEIO_ENOSYS
;
11470 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
11473 *remote_errno
= FILEIO_EINVAL
;
11477 /* Make sure we saw an attachment if and only if we expected one. */
11478 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11479 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11481 *remote_errno
= FILEIO_EINVAL
;
11485 /* If an attachment was found, it must point into the packet buffer;
11486 work out how many bytes there were. */
11487 if (attachment_tmp
!= NULL
)
11489 *attachment
= attachment_tmp
;
11490 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
11496 /* Invalidate the readahead cache. */
11499 readahead_cache_invalidate (void)
11501 struct remote_state
*rs
= get_remote_state ();
11503 rs
->readahead_cache
.fd
= -1;
11506 /* Invalidate the readahead cache if it is holding data for FD. */
11509 readahead_cache_invalidate_fd (int fd
)
11511 struct remote_state
*rs
= get_remote_state ();
11513 if (rs
->readahead_cache
.fd
== fd
)
11514 rs
->readahead_cache
.fd
= -1;
11517 /* Set the filesystem remote_hostio functions that take FILENAME
11518 arguments will use. Return 0 on success, or -1 if an error
11519 occurs (and set *REMOTE_ERRNO). */
11522 remote_hostio_set_filesystem (struct inferior
*inf
, int *remote_errno
)
11524 struct remote_state
*rs
= get_remote_state ();
11525 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11527 int left
= get_remote_packet_size () - 1;
11531 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11534 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11537 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11539 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11540 remote_buffer_add_string (&p
, &left
, arg
);
11542 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_setfs
,
11543 remote_errno
, NULL
, NULL
);
11545 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11549 rs
->fs_pid
= required_pid
;
11554 /* Implementation of to_fileio_open. */
11557 remote_hostio_open (struct target_ops
*self
,
11558 struct inferior
*inf
, const char *filename
,
11559 int flags
, int mode
, int warn_if_slow
,
11562 struct remote_state
*rs
= get_remote_state ();
11564 int left
= get_remote_packet_size () - 1;
11568 static int warning_issued
= 0;
11570 printf_unfiltered (_("Reading %s from remote target...\n"),
11573 if (!warning_issued
)
11575 warning (_("File transfers from remote targets can be slow."
11576 " Use \"set sysroot\" to access files locally"
11578 warning_issued
= 1;
11582 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11585 remote_buffer_add_string (&p
, &left
, "vFile:open:");
11587 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11588 strlen (filename
));
11589 remote_buffer_add_string (&p
, &left
, ",");
11591 remote_buffer_add_int (&p
, &left
, flags
);
11592 remote_buffer_add_string (&p
, &left
, ",");
11594 remote_buffer_add_int (&p
, &left
, mode
);
11596 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
11597 remote_errno
, NULL
, NULL
);
11600 /* Implementation of to_fileio_pwrite. */
11603 remote_hostio_pwrite (struct target_ops
*self
,
11604 int fd
, const gdb_byte
*write_buf
, int len
,
11605 ULONGEST offset
, int *remote_errno
)
11607 struct remote_state
*rs
= get_remote_state ();
11609 int left
= get_remote_packet_size ();
11612 readahead_cache_invalidate_fd (fd
);
11614 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
11616 remote_buffer_add_int (&p
, &left
, fd
);
11617 remote_buffer_add_string (&p
, &left
, ",");
11619 remote_buffer_add_int (&p
, &left
, offset
);
11620 remote_buffer_add_string (&p
, &left
, ",");
11622 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
11623 get_remote_packet_size () - (p
- rs
->buf
));
11625 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
11626 remote_errno
, NULL
, NULL
);
11629 /* Helper for the implementation of to_fileio_pread. Read the file
11630 from the remote side with vFile:pread. */
11633 remote_hostio_pread_vFile (struct target_ops
*self
,
11634 int fd
, gdb_byte
*read_buf
, int len
,
11635 ULONGEST offset
, int *remote_errno
)
11637 struct remote_state
*rs
= get_remote_state ();
11640 int left
= get_remote_packet_size ();
11641 int ret
, attachment_len
;
11644 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
11646 remote_buffer_add_int (&p
, &left
, fd
);
11647 remote_buffer_add_string (&p
, &left
, ",");
11649 remote_buffer_add_int (&p
, &left
, len
);
11650 remote_buffer_add_string (&p
, &left
, ",");
11652 remote_buffer_add_int (&p
, &left
, offset
);
11654 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
11655 remote_errno
, &attachment
,
11661 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11663 if (read_len
!= ret
)
11664 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
11669 /* Serve pread from the readahead cache. Returns number of bytes
11670 read, or 0 if the request can't be served from the cache. */
11673 remote_hostio_pread_from_cache (struct remote_state
*rs
,
11674 int fd
, gdb_byte
*read_buf
, size_t len
,
11677 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11679 if (cache
->fd
== fd
11680 && cache
->offset
<= offset
11681 && offset
< cache
->offset
+ cache
->bufsize
)
11683 ULONGEST max
= cache
->offset
+ cache
->bufsize
;
11685 if (offset
+ len
> max
)
11686 len
= max
- offset
;
11688 memcpy (read_buf
, cache
->buf
+ offset
- cache
->offset
, len
);
11695 /* Implementation of to_fileio_pread. */
11698 remote_hostio_pread (struct target_ops
*self
,
11699 int fd
, gdb_byte
*read_buf
, int len
,
11700 ULONGEST offset
, int *remote_errno
)
11703 struct remote_state
*rs
= get_remote_state ();
11704 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11706 ret
= remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11709 cache
->hit_count
++;
11712 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
11713 pulongest (cache
->hit_count
));
11717 cache
->miss_count
++;
11719 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
11720 pulongest (cache
->miss_count
));
11723 cache
->offset
= offset
;
11724 cache
->bufsize
= get_remote_packet_size ();
11725 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
11727 ret
= remote_hostio_pread_vFile (self
, cache
->fd
, cache
->buf
, cache
->bufsize
,
11728 cache
->offset
, remote_errno
);
11731 readahead_cache_invalidate_fd (fd
);
11735 cache
->bufsize
= ret
;
11736 return remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11739 /* Implementation of to_fileio_close. */
11742 remote_hostio_close (struct target_ops
*self
, int fd
, int *remote_errno
)
11744 struct remote_state
*rs
= get_remote_state ();
11746 int left
= get_remote_packet_size () - 1;
11748 readahead_cache_invalidate_fd (fd
);
11750 remote_buffer_add_string (&p
, &left
, "vFile:close:");
11752 remote_buffer_add_int (&p
, &left
, fd
);
11754 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
11755 remote_errno
, NULL
, NULL
);
11758 /* Implementation of to_fileio_unlink. */
11761 remote_hostio_unlink (struct target_ops
*self
,
11762 struct inferior
*inf
, const char *filename
,
11765 struct remote_state
*rs
= get_remote_state ();
11767 int left
= get_remote_packet_size () - 1;
11769 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11772 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
11774 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11775 strlen (filename
));
11777 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
11778 remote_errno
, NULL
, NULL
);
11781 /* Implementation of to_fileio_readlink. */
11784 remote_hostio_readlink (struct target_ops
*self
,
11785 struct inferior
*inf
, const char *filename
,
11788 struct remote_state
*rs
= get_remote_state ();
11791 int left
= get_remote_packet_size ();
11792 int len
, attachment_len
;
11796 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11799 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
11801 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11802 strlen (filename
));
11804 len
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_readlink
,
11805 remote_errno
, &attachment
,
11811 ret
= (char *) xmalloc (len
+ 1);
11813 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11814 (gdb_byte
*) ret
, len
);
11815 if (read_len
!= len
)
11816 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
11822 /* Implementation of to_fileio_fstat. */
11825 remote_hostio_fstat (struct target_ops
*self
,
11826 int fd
, struct stat
*st
,
11829 struct remote_state
*rs
= get_remote_state ();
11831 int left
= get_remote_packet_size ();
11832 int attachment_len
, ret
;
11834 struct fio_stat fst
;
11837 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
11839 remote_buffer_add_int (&p
, &left
, fd
);
11841 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_fstat
,
11842 remote_errno
, &attachment
,
11846 if (*remote_errno
!= FILEIO_ENOSYS
)
11849 /* Strictly we should return -1, ENOSYS here, but when
11850 "set sysroot remote:" was implemented in August 2008
11851 BFD's need for a stat function was sidestepped with
11852 this hack. This was not remedied until March 2015
11853 so we retain the previous behavior to avoid breaking
11856 Note that the memset is a March 2015 addition; older
11857 GDBs set st_size *and nothing else* so the structure
11858 would have garbage in all other fields. This might
11859 break something but retaining the previous behavior
11860 here would be just too wrong. */
11862 memset (st
, 0, sizeof (struct stat
));
11863 st
->st_size
= INT_MAX
;
11867 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11868 (gdb_byte
*) &fst
, sizeof (fst
));
11870 if (read_len
!= ret
)
11871 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
11873 if (read_len
!= sizeof (fst
))
11874 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11875 read_len
, (int) sizeof (fst
));
11877 remote_fileio_to_host_stat (&fst
, st
);
11882 /* Implementation of to_filesystem_is_local. */
11885 remote_filesystem_is_local (struct target_ops
*self
)
11887 /* Valgrind GDB presents itself as a remote target but works
11888 on the local filesystem: it does not implement remote get
11889 and users are not expected to set a sysroot. To handle
11890 this case we treat the remote filesystem as local if the
11891 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11892 does not support vFile:open. */
11893 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
11895 enum packet_support ps
= packet_support (PACKET_vFile_open
);
11897 if (ps
== PACKET_SUPPORT_UNKNOWN
)
11899 int fd
, remote_errno
;
11901 /* Try opening a file to probe support. The supplied
11902 filename is irrelevant, we only care about whether
11903 the stub recognizes the packet or not. */
11904 fd
= remote_hostio_open (self
, NULL
, "just probing",
11905 FILEIO_O_RDONLY
, 0700, 0,
11909 remote_hostio_close (self
, fd
, &remote_errno
);
11911 ps
= packet_support (PACKET_vFile_open
);
11914 if (ps
== PACKET_DISABLE
)
11916 static int warning_issued
= 0;
11918 if (!warning_issued
)
11920 warning (_("remote target does not support file"
11921 " transfer, attempting to access files"
11922 " from local filesystem."));
11923 warning_issued
= 1;
11934 remote_fileio_errno_to_host (int errnum
)
11940 case FILEIO_ENOENT
:
11948 case FILEIO_EACCES
:
11950 case FILEIO_EFAULT
:
11954 case FILEIO_EEXIST
:
11956 case FILEIO_ENODEV
:
11958 case FILEIO_ENOTDIR
:
11960 case FILEIO_EISDIR
:
11962 case FILEIO_EINVAL
:
11964 case FILEIO_ENFILE
:
11966 case FILEIO_EMFILE
:
11970 case FILEIO_ENOSPC
:
11972 case FILEIO_ESPIPE
:
11976 case FILEIO_ENOSYS
:
11978 case FILEIO_ENAMETOOLONG
:
11979 return ENAMETOOLONG
;
11985 remote_hostio_error (int errnum
)
11987 int host_error
= remote_fileio_errno_to_host (errnum
);
11989 if (host_error
== -1)
11990 error (_("Unknown remote I/O error %d"), errnum
);
11992 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
11996 remote_hostio_close_cleanup (void *opaque
)
11998 int fd
= *(int *) opaque
;
12001 remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
);
12005 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12007 struct cleanup
*back_to
, *close_cleanup
;
12008 int retcode
, fd
, remote_errno
, bytes
, io_size
;
12010 int bytes_in_buffer
;
12013 struct remote_state
*rs
= get_remote_state ();
12015 if (!rs
->remote_desc
)
12016 error (_("command can only be used with remote target"));
12018 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12020 perror_with_name (local_file
);
12022 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
12023 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12025 0700, 0, &remote_errno
);
12027 remote_hostio_error (remote_errno
);
12029 /* Send up to this many bytes at once. They won't all fit in the
12030 remote packet limit, so we'll transfer slightly fewer. */
12031 io_size
= get_remote_packet_size ();
12032 buffer
= (gdb_byte
*) xmalloc (io_size
);
12033 back_to
= make_cleanup (xfree
, buffer
);
12035 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
12037 bytes_in_buffer
= 0;
12040 while (bytes_in_buffer
|| !saw_eof
)
12044 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
12045 io_size
- bytes_in_buffer
,
12049 if (ferror (file
.get ()))
12050 error (_("Error reading %s."), local_file
);
12053 /* EOF. Unless there is something still in the
12054 buffer from the last iteration, we are done. */
12056 if (bytes_in_buffer
== 0)
12064 bytes
+= bytes_in_buffer
;
12065 bytes_in_buffer
= 0;
12067 retcode
= remote_hostio_pwrite (find_target_at (process_stratum
),
12069 offset
, &remote_errno
);
12072 remote_hostio_error (remote_errno
);
12073 else if (retcode
== 0)
12074 error (_("Remote write of %d bytes returned 0!"), bytes
);
12075 else if (retcode
< bytes
)
12077 /* Short write. Save the rest of the read data for the next
12079 bytes_in_buffer
= bytes
- retcode
;
12080 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
12086 discard_cleanups (close_cleanup
);
12087 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12088 remote_hostio_error (remote_errno
);
12091 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12092 do_cleanups (back_to
);
12096 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12098 struct cleanup
*back_to
, *close_cleanup
;
12099 int fd
, remote_errno
, bytes
, io_size
;
12102 struct remote_state
*rs
= get_remote_state ();
12104 if (!rs
->remote_desc
)
12105 error (_("command can only be used with remote target"));
12107 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
12108 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12111 remote_hostio_error (remote_errno
);
12113 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12115 perror_with_name (local_file
);
12117 /* Send up to this many bytes at once. They won't all fit in the
12118 remote packet limit, so we'll transfer slightly fewer. */
12119 io_size
= get_remote_packet_size ();
12120 buffer
= (gdb_byte
*) xmalloc (io_size
);
12121 back_to
= make_cleanup (xfree
, buffer
);
12123 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
12128 bytes
= remote_hostio_pread (find_target_at (process_stratum
),
12129 fd
, buffer
, io_size
, offset
, &remote_errno
);
12131 /* Success, but no bytes, means end-of-file. */
12134 remote_hostio_error (remote_errno
);
12138 bytes
= fwrite (buffer
, 1, bytes
, file
.get ());
12140 perror_with_name (local_file
);
12143 discard_cleanups (close_cleanup
);
12144 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12145 remote_hostio_error (remote_errno
);
12148 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12149 do_cleanups (back_to
);
12153 remote_file_delete (const char *remote_file
, int from_tty
)
12155 int retcode
, remote_errno
;
12156 struct remote_state
*rs
= get_remote_state ();
12158 if (!rs
->remote_desc
)
12159 error (_("command can only be used with remote target"));
12161 retcode
= remote_hostio_unlink (find_target_at (process_stratum
),
12162 NULL
, remote_file
, &remote_errno
);
12164 remote_hostio_error (remote_errno
);
12167 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12171 remote_put_command (const char *args
, int from_tty
)
12174 error_no_arg (_("file to put"));
12176 gdb_argv
argv (args
);
12177 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12178 error (_("Invalid parameters to remote put"));
12180 remote_file_put (argv
[0], argv
[1], from_tty
);
12184 remote_get_command (const char *args
, int from_tty
)
12187 error_no_arg (_("file to get"));
12189 gdb_argv
argv (args
);
12190 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12191 error (_("Invalid parameters to remote get"));
12193 remote_file_get (argv
[0], argv
[1], from_tty
);
12197 remote_delete_command (const char *args
, int from_tty
)
12200 error_no_arg (_("file to delete"));
12202 gdb_argv
argv (args
);
12203 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12204 error (_("Invalid parameters to remote delete"));
12206 remote_file_delete (argv
[0], from_tty
);
12210 remote_command (char *args
, int from_tty
)
12212 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
12216 remote_can_execute_reverse (struct target_ops
*self
)
12218 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12219 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12226 remote_supports_non_stop (struct target_ops
*self
)
12232 remote_supports_disable_randomization (struct target_ops
*self
)
12234 /* Only supported in extended mode. */
12239 remote_supports_multi_process (struct target_ops
*self
)
12241 struct remote_state
*rs
= get_remote_state ();
12243 return remote_multi_process_p (rs
);
12247 remote_supports_cond_tracepoints (void)
12249 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12253 remote_supports_cond_breakpoints (struct target_ops
*self
)
12255 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12259 remote_supports_fast_tracepoints (void)
12261 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12265 remote_supports_static_tracepoints (void)
12267 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12271 remote_supports_install_in_trace (void)
12273 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12277 remote_supports_enable_disable_tracepoint (struct target_ops
*self
)
12279 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12284 remote_supports_string_tracing (struct target_ops
*self
)
12286 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12290 remote_can_run_breakpoint_commands (struct target_ops
*self
)
12292 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12296 remote_trace_init (struct target_ops
*self
)
12298 struct remote_state
*rs
= get_remote_state ();
12301 remote_get_noisy_reply ();
12302 if (strcmp (rs
->buf
, "OK") != 0)
12303 error (_("Target does not support this command."));
12306 static void free_actions_list (char **actions_list
);
12307 static void free_actions_list_cleanup_wrapper (void *);
12309 free_actions_list_cleanup_wrapper (void *al
)
12311 free_actions_list ((char **) al
);
12315 free_actions_list (char **actions_list
)
12319 if (actions_list
== 0)
12322 for (ndx
= 0; actions_list
[ndx
]; ndx
++)
12323 xfree (actions_list
[ndx
]);
12325 xfree (actions_list
);
12328 /* Recursive routine to walk through command list including loops, and
12329 download packets for each command. */
12332 remote_download_command_source (int num
, ULONGEST addr
,
12333 struct command_line
*cmds
)
12335 struct remote_state
*rs
= get_remote_state ();
12336 struct command_line
*cmd
;
12338 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12340 QUIT
; /* Allow user to bail out with ^C. */
12341 strcpy (rs
->buf
, "QTDPsrc:");
12342 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12343 rs
->buf
+ strlen (rs
->buf
),
12344 rs
->buf_size
- strlen (rs
->buf
));
12346 remote_get_noisy_reply ();
12347 if (strcmp (rs
->buf
, "OK"))
12348 warning (_("Target does not support source download."));
12350 if (cmd
->control_type
== while_control
12351 || cmd
->control_type
== while_stepping_control
)
12353 remote_download_command_source (num
, addr
, *cmd
->body_list
);
12355 QUIT
; /* Allow user to bail out with ^C. */
12356 strcpy (rs
->buf
, "QTDPsrc:");
12357 encode_source_string (num
, addr
, "cmd", "end",
12358 rs
->buf
+ strlen (rs
->buf
),
12359 rs
->buf_size
- strlen (rs
->buf
));
12361 remote_get_noisy_reply ();
12362 if (strcmp (rs
->buf
, "OK"))
12363 warning (_("Target does not support source download."));
12369 remote_download_tracepoint (struct target_ops
*self
, struct bp_location
*loc
)
12371 #define BUF_SIZE 2048
12375 char buf
[BUF_SIZE
];
12376 char **tdp_actions
;
12377 char **stepping_actions
;
12379 struct cleanup
*old_chain
= NULL
;
12381 struct breakpoint
*b
= loc
->owner
;
12382 struct tracepoint
*t
= (struct tracepoint
*) b
;
12383 struct remote_state
*rs
= get_remote_state ();
12385 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12386 old_chain
= make_cleanup (free_actions_list_cleanup_wrapper
,
12388 (void) make_cleanup (free_actions_list_cleanup_wrapper
,
12391 tpaddr
= loc
->address
;
12392 sprintf_vma (addrbuf
, tpaddr
);
12393 xsnprintf (buf
, BUF_SIZE
, "QTDP:%x:%s:%c:%lx:%x", b
->number
,
12394 addrbuf
, /* address */
12395 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12396 t
->step_count
, t
->pass_count
);
12397 /* Fast tracepoints are mostly handled by the target, but we can
12398 tell the target how big of an instruction block should be moved
12400 if (b
->type
== bp_fast_tracepoint
)
12402 /* Only test for support at download time; we may not know
12403 target capabilities at definition time. */
12404 if (remote_supports_fast_tracepoints ())
12406 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12408 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":F%x",
12409 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12411 /* If it passed validation at definition but fails now,
12412 something is very wrong. */
12413 internal_error (__FILE__
, __LINE__
,
12414 _("Fast tracepoint not "
12415 "valid during download"));
12418 /* Fast tracepoints are functionally identical to regular
12419 tracepoints, so don't take lack of support as a reason to
12420 give up on the trace run. */
12421 warning (_("Target does not support fast tracepoints, "
12422 "downloading %d as regular tracepoint"), b
->number
);
12424 else if (b
->type
== bp_static_tracepoint
)
12426 /* Only test for support at download time; we may not know
12427 target capabilities at definition time. */
12428 if (remote_supports_static_tracepoints ())
12430 struct static_tracepoint_marker marker
;
12432 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12433 strcat (buf
, ":S");
12435 error (_("Static tracepoint not valid during download"));
12438 /* Fast tracepoints are functionally identical to regular
12439 tracepoints, so don't take lack of support as a reason
12440 to give up on the trace run. */
12441 error (_("Target does not support static tracepoints"));
12443 /* If the tracepoint has a conditional, make it into an agent
12444 expression and append to the definition. */
12447 /* Only test support at download time, we may not know target
12448 capabilities at definition time. */
12449 if (remote_supports_cond_tracepoints ())
12451 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
.get ());
12452 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":X%x,",
12454 pkt
= buf
+ strlen (buf
);
12455 for (ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12456 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12460 warning (_("Target does not support conditional tracepoints, "
12461 "ignoring tp %d cond"), b
->number
);
12464 if (b
->commands
|| *default_collect
)
12467 remote_get_noisy_reply ();
12468 if (strcmp (rs
->buf
, "OK"))
12469 error (_("Target does not support tracepoints."));
12471 /* do_single_steps (t); */
12474 for (ndx
= 0; tdp_actions
[ndx
]; ndx
++)
12476 QUIT
; /* Allow user to bail out with ^C. */
12477 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%c",
12478 b
->number
, addrbuf
, /* address */
12480 ((tdp_actions
[ndx
+ 1] || stepping_actions
)
12483 remote_get_noisy_reply ();
12484 if (strcmp (rs
->buf
, "OK"))
12485 error (_("Error on target while setting tracepoints."));
12488 if (stepping_actions
)
12490 for (ndx
= 0; stepping_actions
[ndx
]; ndx
++)
12492 QUIT
; /* Allow user to bail out with ^C. */
12493 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%s%s",
12494 b
->number
, addrbuf
, /* address */
12495 ((ndx
== 0) ? "S" : ""),
12496 stepping_actions
[ndx
],
12497 (stepping_actions
[ndx
+ 1] ? "-" : ""));
12499 remote_get_noisy_reply ();
12500 if (strcmp (rs
->buf
, "OK"))
12501 error (_("Error on target while setting tracepoints."));
12505 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
12507 if (b
->location
!= NULL
)
12509 strcpy (buf
, "QTDPsrc:");
12510 encode_source_string (b
->number
, loc
->address
, "at",
12511 event_location_to_string (b
->location
.get ()),
12512 buf
+ strlen (buf
), 2048 - strlen (buf
));
12514 remote_get_noisy_reply ();
12515 if (strcmp (rs
->buf
, "OK"))
12516 warning (_("Target does not support source download."));
12518 if (b
->cond_string
)
12520 strcpy (buf
, "QTDPsrc:");
12521 encode_source_string (b
->number
, loc
->address
,
12522 "cond", b
->cond_string
, buf
+ strlen (buf
),
12523 2048 - strlen (buf
));
12525 remote_get_noisy_reply ();
12526 if (strcmp (rs
->buf
, "OK"))
12527 warning (_("Target does not support source download."));
12529 remote_download_command_source (b
->number
, loc
->address
,
12530 breakpoint_commands (b
));
12533 do_cleanups (old_chain
);
12537 remote_can_download_tracepoint (struct target_ops
*self
)
12539 struct remote_state
*rs
= get_remote_state ();
12540 struct trace_status
*ts
;
12543 /* Don't try to install tracepoints until we've relocated our
12544 symbols, and fetched and merged the target's tracepoint list with
12546 if (rs
->starting_up
)
12549 ts
= current_trace_status ();
12550 status
= remote_get_trace_status (self
, ts
);
12552 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
12555 /* If we are in a tracing experiment, but remote stub doesn't support
12556 installing tracepoint in trace, we have to return. */
12557 if (!remote_supports_install_in_trace ())
12565 remote_download_trace_state_variable (struct target_ops
*self
,
12566 struct trace_state_variable
*tsv
)
12568 struct remote_state
*rs
= get_remote_state ();
12571 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12572 tsv
->number
, phex ((ULONGEST
) tsv
->initial_value
, 8),
12574 p
= rs
->buf
+ strlen (rs
->buf
);
12575 if ((p
- rs
->buf
) + strlen (tsv
->name
) * 2 >= get_remote_packet_size ())
12576 error (_("Trace state variable name too long for tsv definition packet"));
12577 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
->name
), p
, strlen (tsv
->name
));
12580 remote_get_noisy_reply ();
12581 if (*rs
->buf
== '\0')
12582 error (_("Target does not support this command."));
12583 if (strcmp (rs
->buf
, "OK") != 0)
12584 error (_("Error on target while downloading trace state variable."));
12588 remote_enable_tracepoint (struct target_ops
*self
,
12589 struct bp_location
*location
)
12591 struct remote_state
*rs
= get_remote_state ();
12594 sprintf_vma (addr_buf
, location
->address
);
12595 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTEnable:%x:%s",
12596 location
->owner
->number
, addr_buf
);
12598 remote_get_noisy_reply ();
12599 if (*rs
->buf
== '\0')
12600 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12601 if (strcmp (rs
->buf
, "OK") != 0)
12602 error (_("Error on target while enabling tracepoint."));
12606 remote_disable_tracepoint (struct target_ops
*self
,
12607 struct bp_location
*location
)
12609 struct remote_state
*rs
= get_remote_state ();
12612 sprintf_vma (addr_buf
, location
->address
);
12613 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisable:%x:%s",
12614 location
->owner
->number
, addr_buf
);
12616 remote_get_noisy_reply ();
12617 if (*rs
->buf
== '\0')
12618 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12619 if (strcmp (rs
->buf
, "OK") != 0)
12620 error (_("Error on target while disabling tracepoint."));
12624 remote_trace_set_readonly_regions (struct target_ops
*self
)
12628 bfd_size_type size
;
12634 return; /* No information to give. */
12636 struct remote_state
*rs
= get_remote_state ();
12638 strcpy (rs
->buf
, "QTro");
12639 offset
= strlen (rs
->buf
);
12640 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
12642 char tmp1
[40], tmp2
[40];
12645 if ((s
->flags
& SEC_LOAD
) == 0 ||
12646 /* (s->flags & SEC_CODE) == 0 || */
12647 (s
->flags
& SEC_READONLY
) == 0)
12651 vma
= bfd_get_section_vma (abfd
, s
);
12652 size
= bfd_get_section_size (s
);
12653 sprintf_vma (tmp1
, vma
);
12654 sprintf_vma (tmp2
, vma
+ size
);
12655 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
12656 if (offset
+ sec_length
+ 1 > rs
->buf_size
)
12658 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
12660 Too many sections for read-only sections definition packet."));
12663 xsnprintf (rs
->buf
+ offset
, rs
->buf_size
- offset
, ":%s,%s",
12665 offset
+= sec_length
;
12670 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12675 remote_trace_start (struct target_ops
*self
)
12677 struct remote_state
*rs
= get_remote_state ();
12679 putpkt ("QTStart");
12680 remote_get_noisy_reply ();
12681 if (*rs
->buf
== '\0')
12682 error (_("Target does not support this command."));
12683 if (strcmp (rs
->buf
, "OK") != 0)
12684 error (_("Bogus reply from target: %s"), rs
->buf
);
12688 remote_get_trace_status (struct target_ops
*self
, struct trace_status
*ts
)
12690 /* Initialize it just to avoid a GCC false warning. */
12692 /* FIXME we need to get register block size some other way. */
12693 extern int trace_regblock_size
;
12694 enum packet_result result
;
12695 struct remote_state
*rs
= get_remote_state ();
12697 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
12700 trace_regblock_size
= get_remote_arch_state ()->sizeof_g_packet
;
12702 putpkt ("qTStatus");
12706 p
= remote_get_noisy_reply ();
12708 CATCH (ex
, RETURN_MASK_ERROR
)
12710 if (ex
.error
!= TARGET_CLOSE_ERROR
)
12712 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
12715 throw_exception (ex
);
12719 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
12721 /* If the remote target doesn't do tracing, flag it. */
12722 if (result
== PACKET_UNKNOWN
)
12725 /* We're working with a live target. */
12726 ts
->filename
= NULL
;
12729 error (_("Bogus trace status reply from target: %s"), rs
->buf
);
12731 /* Function 'parse_trace_status' sets default value of each field of
12732 'ts' at first, so we don't have to do it here. */
12733 parse_trace_status (p
, ts
);
12735 return ts
->running
;
12739 remote_get_tracepoint_status (struct target_ops
*self
, struct breakpoint
*bp
,
12740 struct uploaded_tp
*utp
)
12742 struct remote_state
*rs
= get_remote_state ();
12744 struct bp_location
*loc
;
12745 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
12746 size_t size
= get_remote_packet_size ();
12751 tp
->traceframe_usage
= 0;
12752 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
12754 /* If the tracepoint was never downloaded, don't go asking for
12756 if (tp
->number_on_target
== 0)
12758 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", tp
->number_on_target
,
12759 phex_nz (loc
->address
, 0));
12761 reply
= remote_get_noisy_reply ();
12762 if (reply
&& *reply
)
12765 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12771 utp
->hit_count
= 0;
12772 utp
->traceframe_usage
= 0;
12773 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", utp
->number
,
12774 phex_nz (utp
->addr
, 0));
12776 reply
= remote_get_noisy_reply ();
12777 if (reply
&& *reply
)
12780 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12786 remote_trace_stop (struct target_ops
*self
)
12788 struct remote_state
*rs
= get_remote_state ();
12791 remote_get_noisy_reply ();
12792 if (*rs
->buf
== '\0')
12793 error (_("Target does not support this command."));
12794 if (strcmp (rs
->buf
, "OK") != 0)
12795 error (_("Bogus reply from target: %s"), rs
->buf
);
12799 remote_trace_find (struct target_ops
*self
,
12800 enum trace_find_type type
, int num
,
12801 CORE_ADDR addr1
, CORE_ADDR addr2
,
12804 struct remote_state
*rs
= get_remote_state ();
12805 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12807 int target_frameno
= -1, target_tracept
= -1;
12809 /* Lookups other than by absolute frame number depend on the current
12810 trace selected, so make sure it is correct on the remote end
12812 if (type
!= tfind_number
)
12813 set_remote_traceframe ();
12816 strcpy (p
, "QTFrame:");
12817 p
= strchr (p
, '\0');
12821 xsnprintf (p
, endbuf
- p
, "%x", num
);
12824 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
12827 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
12830 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
12831 phex_nz (addr2
, 0));
12833 case tfind_outside
:
12834 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
12835 phex_nz (addr2
, 0));
12838 error (_("Unknown trace find type %d"), type
);
12842 reply
= remote_get_noisy_reply ();
12843 if (*reply
== '\0')
12844 error (_("Target does not support this command."));
12846 while (reply
&& *reply
)
12851 target_frameno
= (int) strtol (p
, &reply
, 16);
12853 error (_("Unable to parse trace frame number"));
12854 /* Don't update our remote traceframe number cache on failure
12855 to select a remote traceframe. */
12856 if (target_frameno
== -1)
12861 target_tracept
= (int) strtol (p
, &reply
, 16);
12863 error (_("Unable to parse tracepoint number"));
12865 case 'O': /* "OK"? */
12866 if (reply
[1] == 'K' && reply
[2] == '\0')
12869 error (_("Bogus reply from target: %s"), reply
);
12872 error (_("Bogus reply from target: %s"), reply
);
12875 *tpp
= target_tracept
;
12877 rs
->remote_traceframe_number
= target_frameno
;
12878 return target_frameno
;
12882 remote_get_trace_state_variable_value (struct target_ops
*self
,
12883 int tsvnum
, LONGEST
*val
)
12885 struct remote_state
*rs
= get_remote_state ();
12889 set_remote_traceframe ();
12891 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTV:%x", tsvnum
);
12893 reply
= remote_get_noisy_reply ();
12894 if (reply
&& *reply
)
12898 unpack_varlen_hex (reply
+ 1, &uval
);
12899 *val
= (LONGEST
) uval
;
12907 remote_save_trace_data (struct target_ops
*self
, const char *filename
)
12909 struct remote_state
*rs
= get_remote_state ();
12913 strcpy (p
, "QTSave:");
12915 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
12916 error (_("Remote file name too long for trace save packet"));
12917 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
12920 reply
= remote_get_noisy_reply ();
12921 if (*reply
== '\0')
12922 error (_("Target does not support this command."));
12923 if (strcmp (reply
, "OK") != 0)
12924 error (_("Bogus reply from target: %s"), reply
);
12928 /* This is basically a memory transfer, but needs to be its own packet
12929 because we don't know how the target actually organizes its trace
12930 memory, plus we want to be able to ask for as much as possible, but
12931 not be unhappy if we don't get as much as we ask for. */
12934 remote_get_raw_trace_data (struct target_ops
*self
,
12935 gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
12937 struct remote_state
*rs
= get_remote_state ();
12943 strcpy (p
, "qTBuffer:");
12945 p
+= hexnumstr (p
, offset
);
12947 p
+= hexnumstr (p
, len
);
12951 reply
= remote_get_noisy_reply ();
12952 if (reply
&& *reply
)
12954 /* 'l' by itself means we're at the end of the buffer and
12955 there is nothing more to get. */
12959 /* Convert the reply into binary. Limit the number of bytes to
12960 convert according to our passed-in buffer size, rather than
12961 what was returned in the packet; if the target is
12962 unexpectedly generous and gives us a bigger reply than we
12963 asked for, we don't want to crash. */
12964 rslt
= hex2bin (reply
, buf
, len
);
12968 /* Something went wrong, flag as an error. */
12973 remote_set_disconnected_tracing (struct target_ops
*self
, int val
)
12975 struct remote_state
*rs
= get_remote_state ();
12977 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
12981 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisconnected:%x", val
);
12983 reply
= remote_get_noisy_reply ();
12984 if (*reply
== '\0')
12985 error (_("Target does not support this command."));
12986 if (strcmp (reply
, "OK") != 0)
12987 error (_("Bogus reply from target: %s"), reply
);
12990 warning (_("Target does not support disconnected tracing."));
12994 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
12996 struct thread_info
*info
= find_thread_ptid (ptid
);
12998 if (info
&& info
->priv
)
12999 return info
->priv
->core
;
13004 remote_set_circular_trace_buffer (struct target_ops
*self
, int val
)
13006 struct remote_state
*rs
= get_remote_state ();
13009 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTBuffer:circular:%x", val
);
13011 reply
= remote_get_noisy_reply ();
13012 if (*reply
== '\0')
13013 error (_("Target does not support this command."));
13014 if (strcmp (reply
, "OK") != 0)
13015 error (_("Bogus reply from target: %s"), reply
);
13018 static struct traceframe_info
*
13019 remote_traceframe_info (struct target_ops
*self
)
13023 text
= target_read_stralloc (¤t_target
,
13024 TARGET_OBJECT_TRACEFRAME_INFO
, NULL
);
13027 struct traceframe_info
*info
;
13028 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
13030 info
= parse_traceframe_info (text
);
13031 do_cleanups (back_to
);
13038 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13039 instruction on which a fast tracepoint may be placed. Returns -1
13040 if the packet is not supported, and 0 if the minimum instruction
13041 length is unknown. */
13044 remote_get_min_fast_tracepoint_insn_len (struct target_ops
*self
)
13046 struct remote_state
*rs
= get_remote_state ();
13049 /* If we're not debugging a process yet, the IPA can't be
13051 if (!target_has_execution
)
13054 /* Make sure the remote is pointing at the right process. */
13055 set_general_process ();
13057 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTMinFTPILen");
13059 reply
= remote_get_noisy_reply ();
13060 if (*reply
== '\0')
13064 ULONGEST min_insn_len
;
13066 unpack_varlen_hex (reply
, &min_insn_len
);
13068 return (int) min_insn_len
;
13073 remote_set_trace_buffer_size (struct target_ops
*self
, LONGEST val
)
13075 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13077 struct remote_state
*rs
= get_remote_state ();
13078 char *buf
= rs
->buf
;
13079 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13080 enum packet_result result
;
13082 gdb_assert (val
>= 0 || val
== -1);
13083 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13084 /* Send -1 as literal "-1" to avoid host size dependency. */
13088 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13091 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13094 remote_get_noisy_reply ();
13095 result
= packet_ok (rs
->buf
,
13096 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13098 if (result
!= PACKET_OK
)
13099 warning (_("Bogus reply from target: %s"), rs
->buf
);
13104 remote_set_trace_notes (struct target_ops
*self
,
13105 const char *user
, const char *notes
,
13106 const char *stop_notes
)
13108 struct remote_state
*rs
= get_remote_state ();
13110 char *buf
= rs
->buf
;
13111 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13114 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13117 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13118 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13124 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13125 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13131 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13132 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13136 /* Ensure the buffer is terminated. */
13140 reply
= remote_get_noisy_reply ();
13141 if (*reply
== '\0')
13144 if (strcmp (reply
, "OK") != 0)
13145 error (_("Bogus reply from target: %s"), reply
);
13151 remote_use_agent (struct target_ops
*self
, int use
)
13153 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13155 struct remote_state
*rs
= get_remote_state ();
13157 /* If the stub supports QAgent. */
13158 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAgent:%d", use
);
13160 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13162 if (strcmp (rs
->buf
, "OK") == 0)
13173 remote_can_use_agent (struct target_ops
*self
)
13175 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13178 struct btrace_target_info
13180 /* The ptid of the traced thread. */
13183 /* The obtained branch trace configuration. */
13184 struct btrace_config conf
;
13187 /* Reset our idea of our target's btrace configuration. */
13190 remote_btrace_reset (void)
13192 struct remote_state
*rs
= get_remote_state ();
13194 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13197 /* Check whether the target supports branch tracing. */
13200 remote_supports_btrace (struct target_ops
*self
, enum btrace_format format
)
13202 if (packet_support (PACKET_Qbtrace_off
) != PACKET_ENABLE
)
13204 if (packet_support (PACKET_qXfer_btrace
) != PACKET_ENABLE
)
13209 case BTRACE_FORMAT_NONE
:
13212 case BTRACE_FORMAT_BTS
:
13213 return (packet_support (PACKET_Qbtrace_bts
) == PACKET_ENABLE
);
13215 case BTRACE_FORMAT_PT
:
13216 /* The trace is decoded on the host. Even if our target supports it,
13217 we still need to have libipt to decode the trace. */
13218 #if defined (HAVE_LIBIPT)
13219 return (packet_support (PACKET_Qbtrace_pt
) == PACKET_ENABLE
);
13220 #else /* !defined (HAVE_LIBIPT) */
13222 #endif /* !defined (HAVE_LIBIPT) */
13225 internal_error (__FILE__
, __LINE__
, _("Unknown branch trace format"));
13228 /* Synchronize the configuration with the target. */
13231 btrace_sync_conf (const struct btrace_config
*conf
)
13233 struct packet_config
*packet
;
13234 struct remote_state
*rs
;
13235 char *buf
, *pos
, *endbuf
;
13237 rs
= get_remote_state ();
13239 endbuf
= buf
+ get_remote_packet_size ();
13241 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13242 if (packet_config_support (packet
) == PACKET_ENABLE
13243 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13246 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13250 getpkt (&buf
, &rs
->buf_size
, 0);
13252 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13254 if (buf
[0] == 'E' && buf
[1] == '.')
13255 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13257 error (_("Failed to configure the BTS buffer size."));
13260 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13263 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13264 if (packet_config_support (packet
) == PACKET_ENABLE
13265 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13268 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13272 getpkt (&buf
, &rs
->buf_size
, 0);
13274 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13276 if (buf
[0] == 'E' && buf
[1] == '.')
13277 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13279 error (_("Failed to configure the trace buffer size."));
13282 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13286 /* Read the current thread's btrace configuration from the target and
13287 store it into CONF. */
13290 btrace_read_config (struct btrace_config
*conf
)
13294 xml
= target_read_stralloc (¤t_target
,
13295 TARGET_OBJECT_BTRACE_CONF
, "");
13298 struct cleanup
*cleanup
;
13300 cleanup
= make_cleanup (xfree
, xml
);
13301 parse_xml_btrace_conf (conf
, xml
);
13302 do_cleanups (cleanup
);
13306 /* Maybe reopen target btrace. */
13309 remote_btrace_maybe_reopen (void)
13311 struct remote_state
*rs
= get_remote_state ();
13312 struct thread_info
*tp
;
13313 int btrace_target_pushed
= 0;
13316 scoped_restore_current_thread restore_thread
;
13318 ALL_NON_EXITED_THREADS (tp
)
13320 set_general_thread (tp
->ptid
);
13322 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13323 btrace_read_config (&rs
->btrace_config
);
13325 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13328 #if !defined (HAVE_LIBIPT)
13329 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13334 warning (_("GDB does not support Intel Processor Trace. "
13335 "\"record\" will not work in this session."));
13340 #endif /* !defined (HAVE_LIBIPT) */
13342 /* Push target, once, but before anything else happens. This way our
13343 changes to the threads will be cleaned up by unpushing the target
13344 in case btrace_read_config () throws. */
13345 if (!btrace_target_pushed
)
13347 btrace_target_pushed
= 1;
13348 record_btrace_push_target ();
13349 printf_filtered (_("Target is recording using %s.\n"),
13350 btrace_format_string (rs
->btrace_config
.format
));
13353 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13354 tp
->btrace
.target
->ptid
= tp
->ptid
;
13355 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13359 /* Enable branch tracing. */
13361 static struct btrace_target_info
*
13362 remote_enable_btrace (struct target_ops
*self
, ptid_t ptid
,
13363 const struct btrace_config
*conf
)
13365 struct btrace_target_info
*tinfo
= NULL
;
13366 struct packet_config
*packet
= NULL
;
13367 struct remote_state
*rs
= get_remote_state ();
13368 char *buf
= rs
->buf
;
13369 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13371 switch (conf
->format
)
13373 case BTRACE_FORMAT_BTS
:
13374 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13377 case BTRACE_FORMAT_PT
:
13378 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13382 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13383 error (_("Target does not support branch tracing."));
13385 btrace_sync_conf (conf
);
13387 set_general_thread (ptid
);
13389 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13391 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13393 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13395 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13396 error (_("Could not enable branch tracing for %s: %s"),
13397 target_pid_to_str (ptid
), rs
->buf
+ 2);
13399 error (_("Could not enable branch tracing for %s."),
13400 target_pid_to_str (ptid
));
13403 tinfo
= XCNEW (struct btrace_target_info
);
13404 tinfo
->ptid
= ptid
;
13406 /* If we fail to read the configuration, we lose some information, but the
13407 tracing itself is not impacted. */
13410 btrace_read_config (&tinfo
->conf
);
13412 CATCH (err
, RETURN_MASK_ERROR
)
13414 if (err
.message
!= NULL
)
13415 warning ("%s", err
.message
);
13422 /* Disable branch tracing. */
13425 remote_disable_btrace (struct target_ops
*self
,
13426 struct btrace_target_info
*tinfo
)
13428 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13429 struct remote_state
*rs
= get_remote_state ();
13430 char *buf
= rs
->buf
;
13431 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13433 if (packet_config_support (packet
) != PACKET_ENABLE
)
13434 error (_("Target does not support branch tracing."));
13436 set_general_thread (tinfo
->ptid
);
13438 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13440 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13442 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13444 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13445 error (_("Could not disable branch tracing for %s: %s"),
13446 target_pid_to_str (tinfo
->ptid
), rs
->buf
+ 2);
13448 error (_("Could not disable branch tracing for %s."),
13449 target_pid_to_str (tinfo
->ptid
));
13455 /* Teardown branch tracing. */
13458 remote_teardown_btrace (struct target_ops
*self
,
13459 struct btrace_target_info
*tinfo
)
13461 /* We must not talk to the target during teardown. */
13465 /* Read the branch trace. */
13467 static enum btrace_error
13468 remote_read_btrace (struct target_ops
*self
,
13469 struct btrace_data
*btrace
,
13470 struct btrace_target_info
*tinfo
,
13471 enum btrace_read_type type
)
13473 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13474 struct cleanup
*cleanup
;
13478 if (packet_config_support (packet
) != PACKET_ENABLE
)
13479 error (_("Target does not support branch tracing."));
13481 #if !defined(HAVE_LIBEXPAT)
13482 error (_("Cannot process branch tracing result. XML parsing not supported."));
13487 case BTRACE_READ_ALL
:
13490 case BTRACE_READ_NEW
:
13493 case BTRACE_READ_DELTA
:
13497 internal_error (__FILE__
, __LINE__
,
13498 _("Bad branch tracing read type: %u."),
13499 (unsigned int) type
);
13502 xml
= target_read_stralloc (¤t_target
,
13503 TARGET_OBJECT_BTRACE
, annex
);
13505 return BTRACE_ERR_UNKNOWN
;
13507 cleanup
= make_cleanup (xfree
, xml
);
13508 parse_xml_btrace (btrace
, xml
);
13509 do_cleanups (cleanup
);
13511 return BTRACE_ERR_NONE
;
13514 static const struct btrace_config
*
13515 remote_btrace_conf (struct target_ops
*self
,
13516 const struct btrace_target_info
*tinfo
)
13518 return &tinfo
->conf
;
13522 remote_augmented_libraries_svr4_read (struct target_ops
*self
)
13524 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
13528 /* Implementation of to_load. */
13531 remote_load (struct target_ops
*self
, const char *name
, int from_tty
)
13533 generic_load (name
, from_tty
);
13536 /* Accepts an integer PID; returns a string representing a file that
13537 can be opened on the remote side to get the symbols for the child
13538 process. Returns NULL if the operation is not supported. */
13541 remote_pid_to_exec_file (struct target_ops
*self
, int pid
)
13543 static char *filename
= NULL
;
13544 struct inferior
*inf
;
13545 char *annex
= NULL
;
13547 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
13550 if (filename
!= NULL
)
13553 inf
= find_inferior_pid (pid
);
13555 internal_error (__FILE__
, __LINE__
,
13556 _("not currently attached to process %d"), pid
);
13558 if (!inf
->fake_pid_p
)
13560 const int annex_size
= 9;
13562 annex
= (char *) alloca (annex_size
);
13563 xsnprintf (annex
, annex_size
, "%x", pid
);
13566 filename
= target_read_stralloc (¤t_target
,
13567 TARGET_OBJECT_EXEC_FILE
, annex
);
13572 /* Implement the to_can_do_single_step target_ops method. */
13575 remote_can_do_single_step (struct target_ops
*ops
)
13577 /* We can only tell whether target supports single step or not by
13578 supported s and S vCont actions if the stub supports vContSupported
13579 feature. If the stub doesn't support vContSupported feature,
13580 we have conservatively to think target doesn't supports single
13582 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
13584 struct remote_state
*rs
= get_remote_state ();
13586 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13587 remote_vcont_probe (rs
);
13589 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
13595 /* Implementation of the to_execution_direction method for the remote
13598 static enum exec_direction_kind
13599 remote_execution_direction (struct target_ops
*self
)
13601 struct remote_state
*rs
= get_remote_state ();
13603 return rs
->last_resume_exec_dir
;
13606 /* Return pointer to the thread_info struct which corresponds to
13607 THREAD_HANDLE (having length HANDLE_LEN). */
13609 static struct thread_info
*
13610 remote_thread_handle_to_thread_info (struct target_ops
*ops
,
13611 const gdb_byte
*thread_handle
,
13613 struct inferior
*inf
)
13615 struct thread_info
*tp
;
13617 ALL_NON_EXITED_THREADS (tp
)
13619 struct private_thread_info
*priv
= get_private_info_thread (tp
);
13621 if (tp
->inf
== inf
&& priv
!= NULL
)
13623 if (handle_len
!= priv
->thread_handle
->size ())
13624 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
13625 handle_len
, priv
->thread_handle
->size ());
13626 if (memcmp (thread_handle
, priv
->thread_handle
->data (),
13636 init_remote_ops (void)
13638 remote_ops
.to_shortname
= "remote";
13639 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
13640 remote_ops
.to_doc
=
13641 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13642 Specify the serial device it is connected to\n\
13643 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13644 remote_ops
.to_open
= remote_open
;
13645 remote_ops
.to_close
= remote_close
;
13646 remote_ops
.to_detach
= remote_detach
;
13647 remote_ops
.to_disconnect
= remote_disconnect
;
13648 remote_ops
.to_resume
= remote_resume
;
13649 remote_ops
.to_commit_resume
= remote_commit_resume
;
13650 remote_ops
.to_wait
= remote_wait
;
13651 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
13652 remote_ops
.to_store_registers
= remote_store_registers
;
13653 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
13654 remote_ops
.to_files_info
= remote_files_info
;
13655 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
13656 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
13657 remote_ops
.to_stopped_by_sw_breakpoint
= remote_stopped_by_sw_breakpoint
;
13658 remote_ops
.to_supports_stopped_by_sw_breakpoint
= remote_supports_stopped_by_sw_breakpoint
;
13659 remote_ops
.to_stopped_by_hw_breakpoint
= remote_stopped_by_hw_breakpoint
;
13660 remote_ops
.to_supports_stopped_by_hw_breakpoint
= remote_supports_stopped_by_hw_breakpoint
;
13661 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
13662 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
13663 remote_ops
.to_watchpoint_addr_within_range
=
13664 remote_watchpoint_addr_within_range
;
13665 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
13666 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
13667 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
13668 remote_ops
.to_region_ok_for_hw_watchpoint
13669 = remote_region_ok_for_hw_watchpoint
;
13670 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
13671 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
13672 remote_ops
.to_kill
= remote_kill
;
13673 remote_ops
.to_load
= remote_load
;
13674 remote_ops
.to_mourn_inferior
= remote_mourn
;
13675 remote_ops
.to_pass_signals
= remote_pass_signals
;
13676 remote_ops
.to_set_syscall_catchpoint
= remote_set_syscall_catchpoint
;
13677 remote_ops
.to_program_signals
= remote_program_signals
;
13678 remote_ops
.to_thread_alive
= remote_thread_alive
;
13679 remote_ops
.to_thread_name
= remote_thread_name
;
13680 remote_ops
.to_update_thread_list
= remote_update_thread_list
;
13681 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
13682 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
13683 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
13684 remote_ops
.to_stop
= remote_stop
;
13685 remote_ops
.to_interrupt
= remote_interrupt
;
13686 remote_ops
.to_pass_ctrlc
= remote_pass_ctrlc
;
13687 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
13688 remote_ops
.to_get_memory_xfer_limit
= remote_get_memory_xfer_limit
;
13689 remote_ops
.to_rcmd
= remote_rcmd
;
13690 remote_ops
.to_pid_to_exec_file
= remote_pid_to_exec_file
;
13691 remote_ops
.to_log_command
= serial_log_command
;
13692 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
13693 remote_ops
.to_stratum
= process_stratum
;
13694 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
13695 remote_ops
.to_has_memory
= default_child_has_memory
;
13696 remote_ops
.to_has_stack
= default_child_has_stack
;
13697 remote_ops
.to_has_registers
= default_child_has_registers
;
13698 remote_ops
.to_has_execution
= default_child_has_execution
;
13699 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
13700 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
13701 remote_ops
.to_magic
= OPS_MAGIC
;
13702 remote_ops
.to_memory_map
= remote_memory_map
;
13703 remote_ops
.to_flash_erase
= remote_flash_erase
;
13704 remote_ops
.to_flash_done
= remote_flash_done
;
13705 remote_ops
.to_read_description
= remote_read_description
;
13706 remote_ops
.to_search_memory
= remote_search_memory
;
13707 remote_ops
.to_can_async_p
= remote_can_async_p
;
13708 remote_ops
.to_is_async_p
= remote_is_async_p
;
13709 remote_ops
.to_async
= remote_async
;
13710 remote_ops
.to_thread_events
= remote_thread_events
;
13711 remote_ops
.to_can_do_single_step
= remote_can_do_single_step
;
13712 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
13713 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
13714 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
13715 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
13716 remote_ops
.to_supports_disable_randomization
13717 = remote_supports_disable_randomization
;
13718 remote_ops
.to_filesystem_is_local
= remote_filesystem_is_local
;
13719 remote_ops
.to_fileio_open
= remote_hostio_open
;
13720 remote_ops
.to_fileio_pwrite
= remote_hostio_pwrite
;
13721 remote_ops
.to_fileio_pread
= remote_hostio_pread
;
13722 remote_ops
.to_fileio_fstat
= remote_hostio_fstat
;
13723 remote_ops
.to_fileio_close
= remote_hostio_close
;
13724 remote_ops
.to_fileio_unlink
= remote_hostio_unlink
;
13725 remote_ops
.to_fileio_readlink
= remote_hostio_readlink
;
13726 remote_ops
.to_supports_enable_disable_tracepoint
= remote_supports_enable_disable_tracepoint
;
13727 remote_ops
.to_supports_string_tracing
= remote_supports_string_tracing
;
13728 remote_ops
.to_supports_evaluation_of_breakpoint_conditions
= remote_supports_cond_breakpoints
;
13729 remote_ops
.to_can_run_breakpoint_commands
= remote_can_run_breakpoint_commands
;
13730 remote_ops
.to_trace_init
= remote_trace_init
;
13731 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
13732 remote_ops
.to_can_download_tracepoint
= remote_can_download_tracepoint
;
13733 remote_ops
.to_download_trace_state_variable
13734 = remote_download_trace_state_variable
;
13735 remote_ops
.to_enable_tracepoint
= remote_enable_tracepoint
;
13736 remote_ops
.to_disable_tracepoint
= remote_disable_tracepoint
;
13737 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
13738 remote_ops
.to_trace_start
= remote_trace_start
;
13739 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
13740 remote_ops
.to_get_tracepoint_status
= remote_get_tracepoint_status
;
13741 remote_ops
.to_trace_stop
= remote_trace_stop
;
13742 remote_ops
.to_trace_find
= remote_trace_find
;
13743 remote_ops
.to_get_trace_state_variable_value
13744 = remote_get_trace_state_variable_value
;
13745 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
13746 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
13747 remote_ops
.to_upload_trace_state_variables
13748 = remote_upload_trace_state_variables
;
13749 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
13750 remote_ops
.to_get_min_fast_tracepoint_insn_len
= remote_get_min_fast_tracepoint_insn_len
;
13751 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
13752 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
13753 remote_ops
.to_set_trace_buffer_size
= remote_set_trace_buffer_size
;
13754 remote_ops
.to_set_trace_notes
= remote_set_trace_notes
;
13755 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
13756 remote_ops
.to_verify_memory
= remote_verify_memory
;
13757 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
13758 remote_ops
.to_set_permissions
= remote_set_permissions
;
13759 remote_ops
.to_static_tracepoint_marker_at
13760 = remote_static_tracepoint_marker_at
;
13761 remote_ops
.to_static_tracepoint_markers_by_strid
13762 = remote_static_tracepoint_markers_by_strid
;
13763 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
13764 remote_ops
.to_use_agent
= remote_use_agent
;
13765 remote_ops
.to_can_use_agent
= remote_can_use_agent
;
13766 remote_ops
.to_supports_btrace
= remote_supports_btrace
;
13767 remote_ops
.to_enable_btrace
= remote_enable_btrace
;
13768 remote_ops
.to_disable_btrace
= remote_disable_btrace
;
13769 remote_ops
.to_teardown_btrace
= remote_teardown_btrace
;
13770 remote_ops
.to_read_btrace
= remote_read_btrace
;
13771 remote_ops
.to_btrace_conf
= remote_btrace_conf
;
13772 remote_ops
.to_augmented_libraries_svr4_read
=
13773 remote_augmented_libraries_svr4_read
;
13774 remote_ops
.to_follow_fork
= remote_follow_fork
;
13775 remote_ops
.to_follow_exec
= remote_follow_exec
;
13776 remote_ops
.to_insert_fork_catchpoint
= remote_insert_fork_catchpoint
;
13777 remote_ops
.to_remove_fork_catchpoint
= remote_remove_fork_catchpoint
;
13778 remote_ops
.to_insert_vfork_catchpoint
= remote_insert_vfork_catchpoint
;
13779 remote_ops
.to_remove_vfork_catchpoint
= remote_remove_vfork_catchpoint
;
13780 remote_ops
.to_insert_exec_catchpoint
= remote_insert_exec_catchpoint
;
13781 remote_ops
.to_remove_exec_catchpoint
= remote_remove_exec_catchpoint
;
13782 remote_ops
.to_execution_direction
= remote_execution_direction
;
13783 remote_ops
.to_thread_handle_to_thread_info
=
13784 remote_thread_handle_to_thread_info
;
13787 /* Set up the extended remote vector by making a copy of the standard
13788 remote vector and adding to it. */
13791 init_extended_remote_ops (void)
13793 extended_remote_ops
= remote_ops
;
13795 extended_remote_ops
.to_shortname
= "extended-remote";
13796 extended_remote_ops
.to_longname
=
13797 "Extended remote serial target in gdb-specific protocol";
13798 extended_remote_ops
.to_doc
=
13799 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13800 Specify the serial device it is connected to (e.g. /dev/ttya).";
13801 extended_remote_ops
.to_open
= extended_remote_open
;
13802 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
13803 extended_remote_ops
.to_detach
= extended_remote_detach
;
13804 extended_remote_ops
.to_attach
= extended_remote_attach
;
13805 extended_remote_ops
.to_post_attach
= extended_remote_post_attach
;
13806 extended_remote_ops
.to_supports_disable_randomization
13807 = extended_remote_supports_disable_randomization
;
13811 remote_can_async_p (struct target_ops
*ops
)
13813 struct remote_state
*rs
= get_remote_state ();
13815 /* We don't go async if the user has explicitly prevented it with the
13816 "maint set target-async" command. */
13817 if (!target_async_permitted
)
13820 /* We're async whenever the serial device is. */
13821 return serial_can_async_p (rs
->remote_desc
);
13825 remote_is_async_p (struct target_ops
*ops
)
13827 struct remote_state
*rs
= get_remote_state ();
13829 if (!target_async_permitted
)
13830 /* We only enable async when the user specifically asks for it. */
13833 /* We're async whenever the serial device is. */
13834 return serial_is_async_p (rs
->remote_desc
);
13837 /* Pass the SERIAL event on and up to the client. One day this code
13838 will be able to delay notifying the client of an event until the
13839 point where an entire packet has been received. */
13841 static serial_event_ftype remote_async_serial_handler
;
13844 remote_async_serial_handler (struct serial
*scb
, void *context
)
13846 /* Don't propogate error information up to the client. Instead let
13847 the client find out about the error by querying the target. */
13848 inferior_event_handler (INF_REG_EVENT
, NULL
);
13852 remote_async_inferior_event_handler (gdb_client_data data
)
13854 inferior_event_handler (INF_REG_EVENT
, NULL
);
13858 remote_async (struct target_ops
*ops
, int enable
)
13860 struct remote_state
*rs
= get_remote_state ();
13864 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
13866 /* If there are pending events in the stop reply queue tell the
13867 event loop to process them. */
13868 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
13869 mark_async_event_handler (remote_async_inferior_event_token
);
13870 /* For simplicity, below we clear the pending events token
13871 without remembering whether it is marked, so here we always
13872 mark it. If there's actually no pending notification to
13873 process, this ends up being a no-op (other than a spurious
13874 event-loop wakeup). */
13875 if (target_is_non_stop_p ())
13876 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13880 serial_async (rs
->remote_desc
, NULL
, NULL
);
13881 /* If the core is disabling async, it doesn't want to be
13882 disturbed with target events. Clear all async event sources
13884 clear_async_event_handler (remote_async_inferior_event_token
);
13885 if (target_is_non_stop_p ())
13886 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13890 /* Implementation of the to_thread_events method. */
13893 remote_thread_events (struct target_ops
*ops
, int enable
)
13895 struct remote_state
*rs
= get_remote_state ();
13896 size_t size
= get_remote_packet_size ();
13898 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
13901 xsnprintf (rs
->buf
, size
, "QThreadEvents:%x", enable
? 1 : 0);
13903 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13905 switch (packet_ok (rs
->buf
,
13906 &remote_protocol_packets
[PACKET_QThreadEvents
]))
13909 if (strcmp (rs
->buf
, "OK") != 0)
13910 error (_("Remote refused setting thread events: %s"), rs
->buf
);
13913 warning (_("Remote failure reply: %s"), rs
->buf
);
13915 case PACKET_UNKNOWN
:
13921 set_remote_cmd (char *args
, int from_tty
)
13923 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
13927 show_remote_cmd (char *args
, int from_tty
)
13929 /* We can't just use cmd_show_list here, because we want to skip
13930 the redundant "show remote Z-packet" and the legacy aliases. */
13931 struct cmd_list_element
*list
= remote_show_cmdlist
;
13932 struct ui_out
*uiout
= current_uiout
;
13934 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
13935 for (; list
!= NULL
; list
= list
->next
)
13936 if (strcmp (list
->name
, "Z-packet") == 0)
13938 else if (list
->type
== not_set_cmd
)
13939 /* Alias commands are exactly like the original, except they
13940 don't have the normal type. */
13944 ui_out_emit_tuple
option_emitter (uiout
, "option");
13946 uiout
->field_string ("name", list
->name
);
13947 uiout
->text (": ");
13948 if (list
->type
== show_cmd
)
13949 do_show_command (NULL
, from_tty
, list
);
13951 cmd_func (list
, NULL
, from_tty
);
13956 /* Function to be called whenever a new objfile (shlib) is detected. */
13958 remote_new_objfile (struct objfile
*objfile
)
13960 struct remote_state
*rs
= get_remote_state ();
13962 if (rs
->remote_desc
!= 0) /* Have a remote connection. */
13963 remote_check_symbols ();
13966 /* Pull all the tracepoints defined on the target and create local
13967 data structures representing them. We don't want to create real
13968 tracepoints yet, we don't want to mess up the user's existing
13972 remote_upload_tracepoints (struct target_ops
*self
, struct uploaded_tp
**utpp
)
13974 struct remote_state
*rs
= get_remote_state ();
13977 /* Ask for a first packet of tracepoint definition. */
13979 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13981 while (*p
&& *p
!= 'l')
13983 parse_tracepoint_definition (p
, utpp
);
13984 /* Ask for another packet of tracepoint definition. */
13986 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13993 remote_upload_trace_state_variables (struct target_ops
*self
,
13994 struct uploaded_tsv
**utsvp
)
13996 struct remote_state
*rs
= get_remote_state ();
13999 /* Ask for a first packet of variable definition. */
14001 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
14003 while (*p
&& *p
!= 'l')
14005 parse_tsv_definition (p
, utsvp
);
14006 /* Ask for another packet of variable definition. */
14008 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
14014 /* The "set/show range-stepping" show hook. */
14017 show_range_stepping (struct ui_file
*file
, int from_tty
,
14018 struct cmd_list_element
*c
,
14021 fprintf_filtered (file
,
14022 _("Debugger's willingness to use range stepping "
14023 "is %s.\n"), value
);
14026 /* The "set/show range-stepping" set hook. */
14029 set_range_stepping (char *ignore_args
, int from_tty
,
14030 struct cmd_list_element
*c
)
14032 struct remote_state
*rs
= get_remote_state ();
14034 /* Whene enabling, check whether range stepping is actually
14035 supported by the target, and warn if not. */
14036 if (use_range_stepping
)
14038 if (rs
->remote_desc
!= NULL
)
14040 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14041 remote_vcont_probe (rs
);
14043 if (packet_support (PACKET_vCont
) == PACKET_ENABLE
14044 && rs
->supports_vCont
.r
)
14048 warning (_("Range stepping is not supported by the current target"));
14053 _initialize_remote (void)
14055 struct cmd_list_element
*cmd
;
14056 const char *cmd_name
;
14058 /* architecture specific data */
14059 remote_gdbarch_data_handle
=
14060 gdbarch_data_register_post_init (init_remote_state
);
14061 remote_g_packet_data_handle
=
14062 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14065 = register_program_space_data_with_cleanup (NULL
,
14066 remote_pspace_data_cleanup
);
14068 /* Initialize the per-target state. At the moment there is only one
14069 of these, not one per target. Only one target is active at a
14071 remote_state
= new_remote_state ();
14073 init_remote_ops ();
14074 add_target (&remote_ops
);
14076 init_extended_remote_ops ();
14077 add_target (&extended_remote_ops
);
14079 /* Hook into new objfile notification. */
14080 observer_attach_new_objfile (remote_new_objfile
);
14081 /* We're no longer interested in notification events of an inferior
14083 observer_attach_inferior_exit (discard_pending_stop_replies
);
14086 init_remote_threadtests ();
14089 stop_reply_queue
= QUEUE_alloc (stop_reply_p
, stop_reply_xfree
);
14090 /* set/show remote ... */
14092 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
14093 Remote protocol specific variables\n\
14094 Configure various remote-protocol specific variables such as\n\
14095 the packets being used"),
14096 &remote_set_cmdlist
, "set remote ",
14097 0 /* allow-unknown */, &setlist
);
14098 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14099 Remote protocol specific variables\n\
14100 Configure various remote-protocol specific variables such as\n\
14101 the packets being used"),
14102 &remote_show_cmdlist
, "show remote ",
14103 0 /* allow-unknown */, &showlist
);
14105 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14106 Compare section data on target to the exec file.\n\
14107 Argument is a single section name (default: all loaded sections).\n\
14108 To compare only read-only loaded sections, specify the -r option."),
14111 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14112 Send an arbitrary packet to a remote target.\n\
14113 maintenance packet TEXT\n\
14114 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14115 this command sends the string TEXT to the inferior, and displays the\n\
14116 response packet. GDB supplies the initial `$' character, and the\n\
14117 terminating `#' character and checksum."),
14120 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14121 Set whether to send break if interrupted."), _("\
14122 Show whether to send break if interrupted."), _("\
14123 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14124 set_remotebreak
, show_remotebreak
,
14125 &setlist
, &showlist
);
14126 cmd_name
= "remotebreak";
14127 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
14128 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14129 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14130 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
14131 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14133 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14134 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14136 Set interrupt sequence to remote target."), _("\
14137 Show interrupt sequence to remote target."), _("\
14138 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14139 NULL
, show_interrupt_sequence
,
14140 &remote_set_cmdlist
,
14141 &remote_show_cmdlist
);
14143 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14144 &interrupt_on_connect
, _("\
14145 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14146 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14147 If set, interrupt sequence is sent to remote target."),
14149 &remote_set_cmdlist
, &remote_show_cmdlist
);
14151 /* Install commands for configuring memory read/write packets. */
14153 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14154 Set the maximum number of bytes per memory write packet (deprecated)."),
14156 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14157 Show the maximum number of bytes per memory write packet (deprecated)."),
14159 add_cmd ("memory-write-packet-size", no_class
,
14160 set_memory_write_packet_size
, _("\
14161 Set the maximum number of bytes per memory-write packet.\n\
14162 Specify the number of bytes in a packet or 0 (zero) for the\n\
14163 default packet size. The actual limit is further reduced\n\
14164 dependent on the target. Specify ``fixed'' to disable the\n\
14165 further restriction and ``limit'' to enable that restriction."),
14166 &remote_set_cmdlist
);
14167 add_cmd ("memory-read-packet-size", no_class
,
14168 set_memory_read_packet_size
, _("\
14169 Set the maximum number of bytes per memory-read packet.\n\
14170 Specify the number of bytes in a packet or 0 (zero) for the\n\
14171 default packet size. The actual limit is further reduced\n\
14172 dependent on the target. Specify ``fixed'' to disable the\n\
14173 further restriction and ``limit'' to enable that restriction."),
14174 &remote_set_cmdlist
);
14175 add_cmd ("memory-write-packet-size", no_class
,
14176 show_memory_write_packet_size
,
14177 _("Show the maximum number of bytes per memory-write packet."),
14178 &remote_show_cmdlist
);
14179 add_cmd ("memory-read-packet-size", no_class
,
14180 show_memory_read_packet_size
,
14181 _("Show the maximum number of bytes per memory-read packet."),
14182 &remote_show_cmdlist
);
14184 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
14185 &remote_hw_watchpoint_limit
, _("\
14186 Set the maximum number of target hardware watchpoints."), _("\
14187 Show the maximum number of target hardware watchpoints."), _("\
14188 Specify a negative limit for unlimited."),
14189 NULL
, NULL
, /* FIXME: i18n: The maximum
14190 number of target hardware
14191 watchpoints is %s. */
14192 &remote_set_cmdlist
, &remote_show_cmdlist
);
14193 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class
,
14194 &remote_hw_watchpoint_length_limit
, _("\
14195 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14196 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14197 Specify a negative limit for unlimited."),
14198 NULL
, NULL
, /* FIXME: i18n: The maximum
14199 length (in bytes) of a target
14200 hardware watchpoint is %s. */
14201 &remote_set_cmdlist
, &remote_show_cmdlist
);
14202 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
14203 &remote_hw_breakpoint_limit
, _("\
14204 Set the maximum number of target hardware breakpoints."), _("\
14205 Show the maximum number of target hardware breakpoints."), _("\
14206 Specify a negative limit for unlimited."),
14207 NULL
, NULL
, /* FIXME: i18n: The maximum
14208 number of target hardware
14209 breakpoints is %s. */
14210 &remote_set_cmdlist
, &remote_show_cmdlist
);
14212 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14213 &remote_address_size
, _("\
14214 Set the maximum size of the address (in bits) in a memory packet."), _("\
14215 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14217 NULL
, /* FIXME: i18n: */
14218 &setlist
, &showlist
);
14220 init_all_packet_configs ();
14222 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14223 "X", "binary-download", 1);
14225 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14226 "vCont", "verbose-resume", 0);
14228 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14229 "QPassSignals", "pass-signals", 0);
14231 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14232 "QCatchSyscalls", "catch-syscalls", 0);
14234 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14235 "QProgramSignals", "program-signals", 0);
14237 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14238 "QSetWorkingDir", "set-working-dir", 0);
14240 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14241 "QStartupWithShell", "startup-with-shell", 0);
14243 add_packet_config_cmd (&remote_protocol_packets
14244 [PACKET_QEnvironmentHexEncoded
],
14245 "QEnvironmentHexEncoded", "environment-hex-encoded",
14248 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14249 "QEnvironmentReset", "environment-reset",
14252 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14253 "QEnvironmentUnset", "environment-unset",
14256 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14257 "qSymbol", "symbol-lookup", 0);
14259 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14260 "P", "set-register", 1);
14262 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14263 "p", "fetch-register", 1);
14265 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14266 "Z0", "software-breakpoint", 0);
14268 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14269 "Z1", "hardware-breakpoint", 0);
14271 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14272 "Z2", "write-watchpoint", 0);
14274 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14275 "Z3", "read-watchpoint", 0);
14277 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14278 "Z4", "access-watchpoint", 0);
14280 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14281 "qXfer:auxv:read", "read-aux-vector", 0);
14283 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14284 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14286 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14287 "qXfer:features:read", "target-features", 0);
14289 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14290 "qXfer:libraries:read", "library-info", 0);
14292 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14293 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14295 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14296 "qXfer:memory-map:read", "memory-map", 0);
14298 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
14299 "qXfer:spu:read", "read-spu-object", 0);
14301 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
14302 "qXfer:spu:write", "write-spu-object", 0);
14304 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14305 "qXfer:osdata:read", "osdata", 0);
14307 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14308 "qXfer:threads:read", "threads", 0);
14310 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14311 "qXfer:siginfo:read", "read-siginfo-object", 0);
14313 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14314 "qXfer:siginfo:write", "write-siginfo-object", 0);
14316 add_packet_config_cmd
14317 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14318 "qXfer:traceframe-info:read", "traceframe-info", 0);
14320 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14321 "qXfer:uib:read", "unwind-info-block", 0);
14323 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14324 "qGetTLSAddr", "get-thread-local-storage-address",
14327 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14328 "qGetTIBAddr", "get-thread-information-block-address",
14331 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14332 "bc", "reverse-continue", 0);
14334 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14335 "bs", "reverse-step", 0);
14337 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14338 "qSupported", "supported-packets", 0);
14340 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14341 "qSearch:memory", "search-memory", 0);
14343 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14344 "qTStatus", "trace-status", 0);
14346 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14347 "vFile:setfs", "hostio-setfs", 0);
14349 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14350 "vFile:open", "hostio-open", 0);
14352 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14353 "vFile:pread", "hostio-pread", 0);
14355 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14356 "vFile:pwrite", "hostio-pwrite", 0);
14358 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14359 "vFile:close", "hostio-close", 0);
14361 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14362 "vFile:unlink", "hostio-unlink", 0);
14364 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14365 "vFile:readlink", "hostio-readlink", 0);
14367 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14368 "vFile:fstat", "hostio-fstat", 0);
14370 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14371 "vAttach", "attach", 0);
14373 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14376 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14377 "QStartNoAckMode", "noack", 0);
14379 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14380 "vKill", "kill", 0);
14382 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14383 "qAttached", "query-attached", 0);
14385 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14386 "ConditionalTracepoints",
14387 "conditional-tracepoints", 0);
14389 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14390 "ConditionalBreakpoints",
14391 "conditional-breakpoints", 0);
14393 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14394 "BreakpointCommands",
14395 "breakpoint-commands", 0);
14397 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14398 "FastTracepoints", "fast-tracepoints", 0);
14400 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14401 "TracepointSource", "TracepointSource", 0);
14403 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14404 "QAllow", "allow", 0);
14406 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14407 "StaticTracepoints", "static-tracepoints", 0);
14409 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14410 "InstallInTrace", "install-in-trace", 0);
14412 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14413 "qXfer:statictrace:read", "read-sdata-object", 0);
14415 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14416 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14418 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14419 "QDisableRandomization", "disable-randomization", 0);
14421 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14422 "QAgent", "agent", 0);
14424 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14425 "QTBuffer:size", "trace-buffer-size", 0);
14427 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14428 "Qbtrace:off", "disable-btrace", 0);
14430 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14431 "Qbtrace:bts", "enable-btrace-bts", 0);
14433 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14434 "Qbtrace:pt", "enable-btrace-pt", 0);
14436 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14437 "qXfer:btrace", "read-btrace", 0);
14439 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14440 "qXfer:btrace-conf", "read-btrace-conf", 0);
14442 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14443 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14445 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14446 "multiprocess-feature", "multiprocess-feature", 0);
14448 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14449 "swbreak-feature", "swbreak-feature", 0);
14451 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14452 "hwbreak-feature", "hwbreak-feature", 0);
14454 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14455 "fork-event-feature", "fork-event-feature", 0);
14457 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14458 "vfork-event-feature", "vfork-event-feature", 0);
14460 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14461 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14463 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14464 "vContSupported", "verbose-resume-supported", 0);
14466 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14467 "exec-event-feature", "exec-event-feature", 0);
14469 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14470 "vCtrlC", "ctrl-c", 0);
14472 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14473 "QThreadEvents", "thread-events", 0);
14475 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14476 "N stop reply", "no-resumed-stop-reply", 0);
14478 /* Assert that we've registered "set remote foo-packet" commands
14479 for all packet configs. */
14483 for (i
= 0; i
< PACKET_MAX
; i
++)
14485 /* Ideally all configs would have a command associated. Some
14486 still don't though. */
14491 case PACKET_QNonStop
:
14492 case PACKET_EnableDisableTracepoints_feature
:
14493 case PACKET_tracenz_feature
:
14494 case PACKET_DisconnectedTracing_feature
:
14495 case PACKET_augmented_libraries_svr4_read_feature
:
14497 /* Additions to this list need to be well justified:
14498 pre-existing packets are OK; new packets are not. */
14506 /* This catches both forgetting to add a config command, and
14507 forgetting to remove a packet from the exception list. */
14508 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14512 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14513 Z sub-packet has its own set and show commands, but users may
14514 have sets to this variable in their .gdbinit files (or in their
14516 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14517 &remote_Z_packet_detect
, _("\
14518 Set use of remote protocol `Z' packets"), _("\
14519 Show use of remote protocol `Z' packets "), _("\
14520 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14522 set_remote_protocol_Z_packet_cmd
,
14523 show_remote_protocol_Z_packet_cmd
,
14524 /* FIXME: i18n: Use of remote protocol
14525 `Z' packets is %s. */
14526 &remote_set_cmdlist
, &remote_show_cmdlist
);
14528 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
14529 Manipulate files on the remote system\n\
14530 Transfer files to and from the remote target system."),
14531 &remote_cmdlist
, "remote ",
14532 0 /* allow-unknown */, &cmdlist
);
14534 add_cmd ("put", class_files
, remote_put_command
,
14535 _("Copy a local file to the remote system."),
14538 add_cmd ("get", class_files
, remote_get_command
,
14539 _("Copy a remote file to the local system."),
14542 add_cmd ("delete", class_files
, remote_delete_command
,
14543 _("Delete a remote file."),
14546 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14547 &remote_exec_file_var
, _("\
14548 Set the remote pathname for \"run\""), _("\
14549 Show the remote pathname for \"run\""), NULL
,
14550 set_remote_exec_file
,
14551 show_remote_exec_file
,
14552 &remote_set_cmdlist
,
14553 &remote_show_cmdlist
);
14555 add_setshow_boolean_cmd ("range-stepping", class_run
,
14556 &use_range_stepping
, _("\
14557 Enable or disable range stepping."), _("\
14558 Show whether target-assisted range stepping is enabled."), _("\
14559 If on, and the target supports it, when stepping a source line, GDB\n\
14560 tells the target to step the corresponding range of addresses itself instead\n\
14561 of issuing multiple single-steps. This speeds up source level\n\
14562 stepping. If off, GDB always issues single-steps, even if range\n\
14563 stepping is supported by the target. The default is on."),
14564 set_range_stepping
,
14565 show_range_stepping
,
14569 /* Eventually initialize fileio. See fileio.c */
14570 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
14572 /* Take advantage of the fact that the TID field is not used, to tag
14573 special ptids with it set to != 0. */
14574 magic_null_ptid
= ptid_build (42000, -1, 1);
14575 not_sent_ptid
= ptid_build (42000, -2, 1);
14576 any_thread_ptid
= ptid_build (42000, 0, 1);