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 (struct gdbarch
*gdbarch
)
659 gdb_assert (gdbarch
!= NULL
);
660 return ((struct remote_arch_state
*)
661 gdbarch_data (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 (target_gdbarch ());
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 (const 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 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
808 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
810 map_regcache_remote_table (gdbarch
, regs
.data ());
812 *pnum
= regs
[regnum
].pnum
;
813 *poffset
= regs
[regnum
].offset
;
819 init_remote_state (struct gdbarch
*gdbarch
)
821 struct remote_state
*rs
= get_remote_state_raw ();
822 struct remote_arch_state
*rsa
;
824 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
826 /* Use the architecture to build a regnum<->pnum table, which will be
827 1:1 unless a feature set specifies otherwise. */
828 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
829 gdbarch_num_regs (gdbarch
),
832 /* Record the maximum possible size of the g packet - it may turn out
834 rsa
->sizeof_g_packet
= map_regcache_remote_table (gdbarch
, rsa
->regs
);
836 /* Default maximum number of characters in a packet body. Many
837 remote stubs have a hardwired buffer size of 400 bytes
838 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
839 as the maximum packet-size to ensure that the packet and an extra
840 NUL character can always fit in the buffer. This stops GDB
841 trashing stubs that try to squeeze an extra NUL into what is
842 already a full buffer (As of 1999-12-04 that was most stubs). */
843 rsa
->remote_packet_size
= 400 - 1;
845 /* This one is filled in when a ``g'' packet is received. */
846 rsa
->actual_register_packet_size
= 0;
848 /* Should rsa->sizeof_g_packet needs more space than the
849 default, adjust the size accordingly. Remember that each byte is
850 encoded as two characters. 32 is the overhead for the packet
851 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
852 (``$NN:G...#NN'') is a better guess, the below has been padded a
854 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
855 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
857 /* Make sure that the packet buffer is plenty big enough for
858 this architecture. */
859 if (rs
->buf_size
< rsa
->remote_packet_size
)
861 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
862 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
868 /* Return the current allowed size of a remote packet. This is
869 inferred from the current architecture, and should be used to
870 limit the length of outgoing packets. */
872 get_remote_packet_size (void)
874 struct remote_state
*rs
= get_remote_state ();
875 remote_arch_state
*rsa
= get_remote_arch_state (target_gdbarch ());
877 if (rs
->explicit_packet_size
)
878 return rs
->explicit_packet_size
;
880 return rsa
->remote_packet_size
;
883 static struct packet_reg
*
884 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
887 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
891 struct packet_reg
*r
= &rsa
->regs
[regnum
];
893 gdb_assert (r
->regnum
== regnum
);
898 static struct packet_reg
*
899 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
904 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
906 struct packet_reg
*r
= &rsa
->regs
[i
];
914 static struct target_ops remote_ops
;
916 static struct target_ops extended_remote_ops
;
918 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
919 ``forever'' still use the normal timeout mechanism. This is
920 currently used by the ASYNC code to guarentee that target reads
921 during the initial connect always time-out. Once getpkt has been
922 modified to return a timeout indication and, in turn
923 remote_wait()/wait_for_inferior() have gained a timeout parameter
925 static int wait_forever_enabled_p
= 1;
927 /* Allow the user to specify what sequence to send to the remote
928 when he requests a program interruption: Although ^C is usually
929 what remote systems expect (this is the default, here), it is
930 sometimes preferable to send a break. On other systems such
931 as the Linux kernel, a break followed by g, which is Magic SysRq g
932 is required in order to interrupt the execution. */
933 const char interrupt_sequence_control_c
[] = "Ctrl-C";
934 const char interrupt_sequence_break
[] = "BREAK";
935 const char interrupt_sequence_break_g
[] = "BREAK-g";
936 static const char *const interrupt_sequence_modes
[] =
938 interrupt_sequence_control_c
,
939 interrupt_sequence_break
,
940 interrupt_sequence_break_g
,
943 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
946 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
947 struct cmd_list_element
*c
,
950 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
951 fprintf_filtered (file
,
952 _("Send the ASCII ETX character (Ctrl-c) "
953 "to the remote target to interrupt the "
954 "execution of the program.\n"));
955 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
956 fprintf_filtered (file
,
957 _("send a break signal to the remote target "
958 "to interrupt the execution of the program.\n"));
959 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
960 fprintf_filtered (file
,
961 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
962 "the remote target to interrupt the execution "
963 "of Linux kernel.\n"));
965 internal_error (__FILE__
, __LINE__
,
966 _("Invalid value for interrupt_sequence_mode: %s."),
967 interrupt_sequence_mode
);
970 /* This boolean variable specifies whether interrupt_sequence is sent
971 to the remote target when gdb connects to it.
972 This is mostly needed when you debug the Linux kernel: The Linux kernel
973 expects BREAK g which is Magic SysRq g for connecting gdb. */
974 static int interrupt_on_connect
= 0;
976 /* This variable is used to implement the "set/show remotebreak" commands.
977 Since these commands are now deprecated in favor of "set/show remote
978 interrupt-sequence", it no longer has any effect on the code. */
979 static int remote_break
;
982 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
985 interrupt_sequence_mode
= interrupt_sequence_break
;
987 interrupt_sequence_mode
= interrupt_sequence_control_c
;
991 show_remotebreak (struct ui_file
*file
, int from_tty
,
992 struct cmd_list_element
*c
,
997 /* This variable sets the number of bits in an address that are to be
998 sent in a memory ("M" or "m") packet. Normally, after stripping
999 leading zeros, the entire address would be sent. This variable
1000 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1001 initial implementation of remote.c restricted the address sent in
1002 memory packets to ``host::sizeof long'' bytes - (typically 32
1003 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1004 address was never sent. Since fixing this bug may cause a break in
1005 some remote targets this variable is principly provided to
1006 facilitate backward compatibility. */
1008 static unsigned int remote_address_size
;
1011 /* User configurable variables for the number of characters in a
1012 memory read/write packet. MIN (rsa->remote_packet_size,
1013 rsa->sizeof_g_packet) is the default. Some targets need smaller
1014 values (fifo overruns, et.al.) and some users need larger values
1015 (speed up transfers). The variables ``preferred_*'' (the user
1016 request), ``current_*'' (what was actually set) and ``forced_*''
1017 (Positive - a soft limit, negative - a hard limit). */
1019 struct memory_packet_config
1026 /* The default max memory-write-packet-size. The 16k is historical.
1027 (It came from older GDB's using alloca for buffers and the
1028 knowledge (folklore?) that some hosts don't cope very well with
1029 large alloca calls.) */
1030 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1032 /* The minimum remote packet size for memory transfers. Ensures we
1033 can write at least one byte. */
1034 #define MIN_MEMORY_PACKET_SIZE 20
1036 /* Compute the current size of a read/write packet. Since this makes
1037 use of ``actual_register_packet_size'' the computation is dynamic. */
1040 get_memory_packet_size (struct memory_packet_config
*config
)
1042 struct remote_state
*rs
= get_remote_state ();
1043 remote_arch_state
*rsa
= get_remote_arch_state (target_gdbarch ());
1046 if (config
->fixed_p
)
1048 if (config
->size
<= 0)
1049 what_they_get
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1051 what_they_get
= config
->size
;
1055 what_they_get
= get_remote_packet_size ();
1056 /* Limit the packet to the size specified by the user. */
1057 if (config
->size
> 0
1058 && what_they_get
> config
->size
)
1059 what_they_get
= config
->size
;
1061 /* Limit it to the size of the targets ``g'' response unless we have
1062 permission from the stub to use a larger packet size. */
1063 if (rs
->explicit_packet_size
== 0
1064 && rsa
->actual_register_packet_size
> 0
1065 && what_they_get
> rsa
->actual_register_packet_size
)
1066 what_they_get
= rsa
->actual_register_packet_size
;
1068 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1069 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1071 /* Make sure there is room in the global buffer for this packet
1072 (including its trailing NUL byte). */
1073 if (rs
->buf_size
< what_they_get
+ 1)
1075 rs
->buf_size
= 2 * what_they_get
;
1076 rs
->buf
= (char *) xrealloc (rs
->buf
, 2 * what_they_get
);
1079 return what_they_get
;
1082 /* Update the size of a read/write packet. If they user wants
1083 something really big then do a sanity check. */
1086 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1088 int fixed_p
= config
->fixed_p
;
1089 long size
= config
->size
;
1092 error (_("Argument required (integer, `fixed' or `limited')."));
1093 else if (strcmp (args
, "hard") == 0
1094 || strcmp (args
, "fixed") == 0)
1096 else if (strcmp (args
, "soft") == 0
1097 || strcmp (args
, "limit") == 0)
1103 size
= strtoul (args
, &end
, 0);
1105 error (_("Invalid %s (bad syntax)."), config
->name
);
1107 /* Instead of explicitly capping the size of a packet to or
1108 disallowing it, the user is allowed to set the size to
1109 something arbitrarily large. */
1112 /* So that the query shows the correct value. */
1114 size
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1117 if (fixed_p
&& !config
->fixed_p
)
1119 if (! query (_("The target may not be able to correctly handle a %s\n"
1120 "of %ld bytes. Change the packet size? "),
1121 config
->name
, size
))
1122 error (_("Packet size not changed."));
1124 /* Update the config. */
1125 config
->fixed_p
= fixed_p
;
1126 config
->size
= size
;
1130 show_memory_packet_size (struct memory_packet_config
*config
)
1132 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1133 if (config
->fixed_p
)
1134 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1135 get_memory_packet_size (config
));
1137 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1138 get_memory_packet_size (config
));
1141 static struct memory_packet_config memory_write_packet_config
=
1143 "memory-write-packet-size",
1147 set_memory_write_packet_size (const char *args
, int from_tty
)
1149 set_memory_packet_size (args
, &memory_write_packet_config
);
1153 show_memory_write_packet_size (const char *args
, int from_tty
)
1155 show_memory_packet_size (&memory_write_packet_config
);
1159 get_memory_write_packet_size (void)
1161 return get_memory_packet_size (&memory_write_packet_config
);
1164 static struct memory_packet_config memory_read_packet_config
=
1166 "memory-read-packet-size",
1170 set_memory_read_packet_size (const char *args
, int from_tty
)
1172 set_memory_packet_size (args
, &memory_read_packet_config
);
1176 show_memory_read_packet_size (const char *args
, int from_tty
)
1178 show_memory_packet_size (&memory_read_packet_config
);
1182 get_memory_read_packet_size (void)
1184 long size
= get_memory_packet_size (&memory_read_packet_config
);
1186 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1187 extra buffer size argument before the memory read size can be
1188 increased beyond this. */
1189 if (size
> get_remote_packet_size ())
1190 size
= get_remote_packet_size ();
1195 /* Generic configuration support for packets the stub optionally
1196 supports. Allows the user to specify the use of the packet as well
1197 as allowing GDB to auto-detect support in the remote stub. */
1201 PACKET_SUPPORT_UNKNOWN
= 0,
1206 struct packet_config
1211 /* If auto, GDB auto-detects support for this packet or feature,
1212 either through qSupported, or by trying the packet and looking
1213 at the response. If true, GDB assumes the target supports this
1214 packet. If false, the packet is disabled. Configs that don't
1215 have an associated command always have this set to auto. */
1216 enum auto_boolean detect
;
1218 /* Does the target support this packet? */
1219 enum packet_support support
;
1222 /* Analyze a packet's return value and update the packet config
1232 static enum packet_support
packet_config_support (struct packet_config
*config
);
1233 static enum packet_support
packet_support (int packet
);
1236 show_packet_config_cmd (struct packet_config
*config
)
1238 const char *support
= "internal-error";
1240 switch (packet_config_support (config
))
1243 support
= "enabled";
1245 case PACKET_DISABLE
:
1246 support
= "disabled";
1248 case PACKET_SUPPORT_UNKNOWN
:
1249 support
= "unknown";
1252 switch (config
->detect
)
1254 case AUTO_BOOLEAN_AUTO
:
1255 printf_filtered (_("Support for the `%s' packet "
1256 "is auto-detected, currently %s.\n"),
1257 config
->name
, support
);
1259 case AUTO_BOOLEAN_TRUE
:
1260 case AUTO_BOOLEAN_FALSE
:
1261 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1262 config
->name
, support
);
1268 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1269 const char *title
, int legacy
)
1275 config
->name
= name
;
1276 config
->title
= title
;
1277 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1279 show_doc
= xstrprintf ("Show current use of remote "
1280 "protocol `%s' (%s) packet",
1282 /* set/show TITLE-packet {auto,on,off} */
1283 cmd_name
= xstrprintf ("%s-packet", title
);
1284 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1285 &config
->detect
, set_doc
,
1286 show_doc
, NULL
, /* help_doc */
1288 show_remote_protocol_packet_cmd
,
1289 &remote_set_cmdlist
, &remote_show_cmdlist
);
1290 /* The command code copies the documentation strings. */
1293 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1298 legacy_name
= xstrprintf ("%s-packet", name
);
1299 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1300 &remote_set_cmdlist
);
1301 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1302 &remote_show_cmdlist
);
1306 static enum packet_result
1307 packet_check_result (const char *buf
)
1311 /* The stub recognized the packet request. Check that the
1312 operation succeeded. */
1314 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1316 /* "Enn" - definitly an error. */
1317 return PACKET_ERROR
;
1319 /* Always treat "E." as an error. This will be used for
1320 more verbose error messages, such as E.memtypes. */
1321 if (buf
[0] == 'E' && buf
[1] == '.')
1322 return PACKET_ERROR
;
1324 /* The packet may or may not be OK. Just assume it is. */
1328 /* The stub does not support the packet. */
1329 return PACKET_UNKNOWN
;
1332 static enum packet_result
1333 packet_ok (const char *buf
, struct packet_config
*config
)
1335 enum packet_result result
;
1337 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1338 && config
->support
== PACKET_DISABLE
)
1339 internal_error (__FILE__
, __LINE__
,
1340 _("packet_ok: attempt to use a disabled packet"));
1342 result
= packet_check_result (buf
);
1347 /* The stub recognized the packet request. */
1348 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1351 fprintf_unfiltered (gdb_stdlog
,
1352 "Packet %s (%s) is supported\n",
1353 config
->name
, config
->title
);
1354 config
->support
= PACKET_ENABLE
;
1357 case PACKET_UNKNOWN
:
1358 /* The stub does not support the packet. */
1359 if (config
->detect
== AUTO_BOOLEAN_AUTO
1360 && config
->support
== PACKET_ENABLE
)
1362 /* If the stub previously indicated that the packet was
1363 supported then there is a protocol error. */
1364 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1365 config
->name
, config
->title
);
1367 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
1369 /* The user set it wrong. */
1370 error (_("Enabled packet %s (%s) not recognized by stub"),
1371 config
->name
, config
->title
);
1375 fprintf_unfiltered (gdb_stdlog
,
1376 "Packet %s (%s) is NOT supported\n",
1377 config
->name
, config
->title
);
1378 config
->support
= PACKET_DISABLE
;
1399 PACKET_vFile_pwrite
,
1401 PACKET_vFile_unlink
,
1402 PACKET_vFile_readlink
,
1405 PACKET_qXfer_features
,
1406 PACKET_qXfer_exec_file
,
1407 PACKET_qXfer_libraries
,
1408 PACKET_qXfer_libraries_svr4
,
1409 PACKET_qXfer_memory_map
,
1410 PACKET_qXfer_spu_read
,
1411 PACKET_qXfer_spu_write
,
1412 PACKET_qXfer_osdata
,
1413 PACKET_qXfer_threads
,
1414 PACKET_qXfer_statictrace_read
,
1415 PACKET_qXfer_traceframe_info
,
1421 PACKET_QPassSignals
,
1422 PACKET_QCatchSyscalls
,
1423 PACKET_QProgramSignals
,
1424 PACKET_QSetWorkingDir
,
1425 PACKET_QStartupWithShell
,
1426 PACKET_QEnvironmentHexEncoded
,
1427 PACKET_QEnvironmentReset
,
1428 PACKET_QEnvironmentUnset
,
1430 PACKET_qSearch_memory
,
1433 PACKET_QStartNoAckMode
,
1435 PACKET_qXfer_siginfo_read
,
1436 PACKET_qXfer_siginfo_write
,
1439 /* Support for conditional tracepoints. */
1440 PACKET_ConditionalTracepoints
,
1442 /* Support for target-side breakpoint conditions. */
1443 PACKET_ConditionalBreakpoints
,
1445 /* Support for target-side breakpoint commands. */
1446 PACKET_BreakpointCommands
,
1448 /* Support for fast tracepoints. */
1449 PACKET_FastTracepoints
,
1451 /* Support for static tracepoints. */
1452 PACKET_StaticTracepoints
,
1454 /* Support for installing tracepoints while a trace experiment is
1456 PACKET_InstallInTrace
,
1460 PACKET_TracepointSource
,
1463 PACKET_QDisableRandomization
,
1465 PACKET_QTBuffer_size
,
1469 PACKET_qXfer_btrace
,
1471 /* Support for the QNonStop packet. */
1474 /* Support for the QThreadEvents packet. */
1475 PACKET_QThreadEvents
,
1477 /* Support for multi-process extensions. */
1478 PACKET_multiprocess_feature
,
1480 /* Support for enabling and disabling tracepoints while a trace
1481 experiment is running. */
1482 PACKET_EnableDisableTracepoints_feature
,
1484 /* Support for collecting strings using the tracenz bytecode. */
1485 PACKET_tracenz_feature
,
1487 /* Support for continuing to run a trace experiment while GDB is
1489 PACKET_DisconnectedTracing_feature
,
1491 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1492 PACKET_augmented_libraries_svr4_read_feature
,
1494 /* Support for the qXfer:btrace-conf:read packet. */
1495 PACKET_qXfer_btrace_conf
,
1497 /* Support for the Qbtrace-conf:bts:size packet. */
1498 PACKET_Qbtrace_conf_bts_size
,
1500 /* Support for swbreak+ feature. */
1501 PACKET_swbreak_feature
,
1503 /* Support for hwbreak+ feature. */
1504 PACKET_hwbreak_feature
,
1506 /* Support for fork events. */
1507 PACKET_fork_event_feature
,
1509 /* Support for vfork events. */
1510 PACKET_vfork_event_feature
,
1512 /* Support for the Qbtrace-conf:pt:size packet. */
1513 PACKET_Qbtrace_conf_pt_size
,
1515 /* Support for exec events. */
1516 PACKET_exec_event_feature
,
1518 /* Support for query supported vCont actions. */
1519 PACKET_vContSupported
,
1521 /* Support remote CTRL-C. */
1524 /* Support TARGET_WAITKIND_NO_RESUMED. */
1530 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1532 /* Returns the packet's corresponding "set remote foo-packet" command
1533 state. See struct packet_config for more details. */
1535 static enum auto_boolean
1536 packet_set_cmd_state (int packet
)
1538 return remote_protocol_packets
[packet
].detect
;
1541 /* Returns whether a given packet or feature is supported. This takes
1542 into account the state of the corresponding "set remote foo-packet"
1543 command, which may be used to bypass auto-detection. */
1545 static enum packet_support
1546 packet_config_support (struct packet_config
*config
)
1548 switch (config
->detect
)
1550 case AUTO_BOOLEAN_TRUE
:
1551 return PACKET_ENABLE
;
1552 case AUTO_BOOLEAN_FALSE
:
1553 return PACKET_DISABLE
;
1554 case AUTO_BOOLEAN_AUTO
:
1555 return config
->support
;
1557 gdb_assert_not_reached (_("bad switch"));
1561 /* Same as packet_config_support, but takes the packet's enum value as
1564 static enum packet_support
1565 packet_support (int packet
)
1567 struct packet_config
*config
= &remote_protocol_packets
[packet
];
1569 return packet_config_support (config
);
1573 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1574 struct cmd_list_element
*c
,
1577 struct packet_config
*packet
;
1579 for (packet
= remote_protocol_packets
;
1580 packet
< &remote_protocol_packets
[PACKET_MAX
];
1583 if (&packet
->detect
== c
->var
)
1585 show_packet_config_cmd (packet
);
1589 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
1593 /* Should we try one of the 'Z' requests? */
1597 Z_PACKET_SOFTWARE_BP
,
1598 Z_PACKET_HARDWARE_BP
,
1605 /* For compatibility with older distributions. Provide a ``set remote
1606 Z-packet ...'' command that updates all the Z packet types. */
1608 static enum auto_boolean remote_Z_packet_detect
;
1611 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
1612 struct cmd_list_element
*c
)
1616 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1617 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1621 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1622 struct cmd_list_element
*c
,
1627 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1629 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1633 /* Returns true if the multi-process extensions are in effect. */
1636 remote_multi_process_p (struct remote_state
*rs
)
1638 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
1641 /* Returns true if fork events are supported. */
1644 remote_fork_event_p (struct remote_state
*rs
)
1646 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
1649 /* Returns true if vfork events are supported. */
1652 remote_vfork_event_p (struct remote_state
*rs
)
1654 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
1657 /* Returns true if exec events are supported. */
1660 remote_exec_event_p (struct remote_state
*rs
)
1662 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
1665 /* Insert fork catchpoint target routine. If fork events are enabled
1666 then return success, nothing more to do. */
1669 remote_insert_fork_catchpoint (struct target_ops
*ops
, int pid
)
1671 struct remote_state
*rs
= get_remote_state ();
1673 return !remote_fork_event_p (rs
);
1676 /* Remove fork catchpoint target routine. Nothing to do, just
1680 remote_remove_fork_catchpoint (struct target_ops
*ops
, int pid
)
1685 /* Insert vfork catchpoint target routine. If vfork events are enabled
1686 then return success, nothing more to do. */
1689 remote_insert_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1691 struct remote_state
*rs
= get_remote_state ();
1693 return !remote_vfork_event_p (rs
);
1696 /* Remove vfork catchpoint target routine. Nothing to do, just
1700 remote_remove_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1705 /* Insert exec catchpoint target routine. If exec events are
1706 enabled, just return success. */
1709 remote_insert_exec_catchpoint (struct target_ops
*ops
, int pid
)
1711 struct remote_state
*rs
= get_remote_state ();
1713 return !remote_exec_event_p (rs
);
1716 /* Remove exec catchpoint target routine. Nothing to do, just
1720 remote_remove_exec_catchpoint (struct target_ops
*ops
, int pid
)
1726 /* Asynchronous signal handle registered as event loop source for
1727 when we have pending events ready to be passed to the core. */
1729 static struct async_event_handler
*remote_async_inferior_event_token
;
1733 static ptid_t magic_null_ptid
;
1734 static ptid_t not_sent_ptid
;
1735 static ptid_t any_thread_ptid
;
1737 /* Find out if the stub attached to PID (and hence GDB should offer to
1738 detach instead of killing it when bailing out). */
1741 remote_query_attached (int pid
)
1743 struct remote_state
*rs
= get_remote_state ();
1744 size_t size
= get_remote_packet_size ();
1746 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
1749 if (remote_multi_process_p (rs
))
1750 xsnprintf (rs
->buf
, size
, "qAttached:%x", pid
);
1752 xsnprintf (rs
->buf
, size
, "qAttached");
1755 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1757 switch (packet_ok (rs
->buf
,
1758 &remote_protocol_packets
[PACKET_qAttached
]))
1761 if (strcmp (rs
->buf
, "1") == 0)
1765 warning (_("Remote failure reply: %s"), rs
->buf
);
1767 case PACKET_UNKNOWN
:
1774 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1775 has been invented by GDB, instead of reported by the target. Since
1776 we can be connected to a remote system before before knowing about
1777 any inferior, mark the target with execution when we find the first
1778 inferior. If ATTACHED is 1, then we had just attached to this
1779 inferior. If it is 0, then we just created this inferior. If it
1780 is -1, then try querying the remote stub to find out if it had
1781 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1782 attempt to open this inferior's executable as the main executable
1783 if no main executable is open already. */
1785 static struct inferior
*
1786 remote_add_inferior (int fake_pid_p
, int pid
, int attached
,
1789 struct inferior
*inf
;
1791 /* Check whether this process we're learning about is to be
1792 considered attached, or if is to be considered to have been
1793 spawned by the stub. */
1795 attached
= remote_query_attached (pid
);
1797 if (gdbarch_has_global_solist (target_gdbarch ()))
1799 /* If the target shares code across all inferiors, then every
1800 attach adds a new inferior. */
1801 inf
= add_inferior (pid
);
1803 /* ... and every inferior is bound to the same program space.
1804 However, each inferior may still have its own address
1806 inf
->aspace
= maybe_new_address_space ();
1807 inf
->pspace
= current_program_space
;
1811 /* In the traditional debugging scenario, there's a 1-1 match
1812 between program/address spaces. We simply bind the inferior
1813 to the program space's address space. */
1814 inf
= current_inferior ();
1815 inferior_appeared (inf
, pid
);
1818 inf
->attach_flag
= attached
;
1819 inf
->fake_pid_p
= fake_pid_p
;
1821 /* If no main executable is currently open then attempt to
1822 open the file that was executed to create this inferior. */
1823 if (try_open_exec
&& get_exec_file (0) == NULL
)
1824 exec_file_locate_attach (pid
, 0, 1);
1829 static struct private_thread_info
*
1830 get_private_info_thread (struct thread_info
*info
);
1832 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1833 according to RUNNING. */
1836 remote_add_thread (ptid_t ptid
, int running
, int executing
)
1838 struct remote_state
*rs
= get_remote_state ();
1839 struct thread_info
*thread
;
1841 /* GDB historically didn't pull threads in the initial connection
1842 setup. If the remote target doesn't even have a concept of
1843 threads (e.g., a bare-metal target), even if internally we
1844 consider that a single-threaded target, mentioning a new thread
1845 might be confusing to the user. Be silent then, preserving the
1846 age old behavior. */
1847 if (rs
->starting_up
)
1848 thread
= add_thread_silent (ptid
);
1850 thread
= add_thread (ptid
);
1852 get_private_info_thread (thread
)->vcont_resumed
= executing
;
1853 set_executing (ptid
, executing
);
1854 set_running (ptid
, running
);
1857 /* Come here when we learn about a thread id from the remote target.
1858 It may be the first time we hear about such thread, so take the
1859 opportunity to add it to GDB's thread list. In case this is the
1860 first time we're noticing its corresponding inferior, add it to
1861 GDB's inferior list as well. EXECUTING indicates whether the
1862 thread is (internally) executing or stopped. */
1865 remote_notice_new_inferior (ptid_t currthread
, int executing
)
1867 /* In non-stop mode, we assume new found threads are (externally)
1868 running until proven otherwise with a stop reply. In all-stop,
1869 we can only get here if all threads are stopped. */
1870 int running
= target_is_non_stop_p () ? 1 : 0;
1872 /* If this is a new thread, add it to GDB's thread list.
1873 If we leave it up to WFI to do this, bad things will happen. */
1875 if (in_thread_list (currthread
) && is_exited (currthread
))
1877 /* We're seeing an event on a thread id we knew had exited.
1878 This has to be a new thread reusing the old id. Add it. */
1879 remote_add_thread (currthread
, running
, executing
);
1883 if (!in_thread_list (currthread
))
1885 struct inferior
*inf
= NULL
;
1886 int pid
= ptid_get_pid (currthread
);
1888 if (ptid_is_pid (inferior_ptid
)
1889 && pid
== ptid_get_pid (inferior_ptid
))
1891 /* inferior_ptid has no thread member yet. This can happen
1892 with the vAttach -> remote_wait,"TAAthread:" path if the
1893 stub doesn't support qC. This is the first stop reported
1894 after an attach, so this is the main thread. Update the
1895 ptid in the thread list. */
1896 if (in_thread_list (pid_to_ptid (pid
)))
1897 thread_change_ptid (inferior_ptid
, currthread
);
1900 remote_add_thread (currthread
, running
, executing
);
1901 inferior_ptid
= currthread
;
1906 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1908 /* inferior_ptid is not set yet. This can happen with the
1909 vRun -> remote_wait,"TAAthread:" path if the stub
1910 doesn't support qC. This is the first stop reported
1911 after an attach, so this is the main thread. Update the
1912 ptid in the thread list. */
1913 thread_change_ptid (inferior_ptid
, currthread
);
1917 /* When connecting to a target remote, or to a target
1918 extended-remote which already was debugging an inferior, we
1919 may not know about it yet. Add it before adding its child
1920 thread, so notifications are emitted in a sensible order. */
1921 if (!in_inferior_list (ptid_get_pid (currthread
)))
1923 struct remote_state
*rs
= get_remote_state ();
1924 int fake_pid_p
= !remote_multi_process_p (rs
);
1926 inf
= remote_add_inferior (fake_pid_p
,
1927 ptid_get_pid (currthread
), -1, 1);
1930 /* This is really a new thread. Add it. */
1931 remote_add_thread (currthread
, running
, executing
);
1933 /* If we found a new inferior, let the common code do whatever
1934 it needs to with it (e.g., read shared libraries, insert
1935 breakpoints), unless we're just setting up an all-stop
1939 struct remote_state
*rs
= get_remote_state ();
1941 if (!rs
->starting_up
)
1942 notice_new_inferior (currthread
, executing
, 0);
1947 /* Return THREAD's private thread data, creating it if necessary. */
1949 static struct private_thread_info
*
1950 get_private_info_thread (struct thread_info
*thread
)
1952 gdb_assert (thread
!= NULL
);
1954 if (thread
->priv
== NULL
)
1956 struct private_thread_info
*priv
= XNEW (struct private_thread_info
);
1958 thread
->private_dtor
= free_private_thread_info
;
1959 thread
->priv
= priv
;
1965 priv
->last_resume_step
= 0;
1966 priv
->last_resume_sig
= GDB_SIGNAL_0
;
1967 priv
->vcont_resumed
= 0;
1968 priv
->thread_handle
= nullptr;
1971 return thread
->priv
;
1974 /* Return PTID's private thread data, creating it if necessary. */
1976 static struct private_thread_info
*
1977 get_private_info_ptid (ptid_t ptid
)
1979 struct thread_info
*info
= find_thread_ptid (ptid
);
1981 return get_private_info_thread (info
);
1984 /* Call this function as a result of
1985 1) A halt indication (T packet) containing a thread id
1986 2) A direct query of currthread
1987 3) Successful execution of set thread */
1990 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
1992 rs
->general_thread
= currthread
;
1995 /* If 'QPassSignals' is supported, tell the remote stub what signals
1996 it can simply pass through to the inferior without reporting. */
1999 remote_pass_signals (struct target_ops
*self
,
2000 int numsigs
, unsigned char *pass_signals
)
2002 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
2004 char *pass_packet
, *p
;
2006 struct remote_state
*rs
= get_remote_state ();
2008 gdb_assert (numsigs
< 256);
2009 for (i
= 0; i
< numsigs
; i
++)
2011 if (pass_signals
[i
])
2014 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
2015 strcpy (pass_packet
, "QPassSignals:");
2016 p
= pass_packet
+ strlen (pass_packet
);
2017 for (i
= 0; i
< numsigs
; i
++)
2019 if (pass_signals
[i
])
2022 *p
++ = tohex (i
>> 4);
2023 *p
++ = tohex (i
& 15);
2032 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2034 putpkt (pass_packet
);
2035 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2036 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2037 if (rs
->last_pass_packet
)
2038 xfree (rs
->last_pass_packet
);
2039 rs
->last_pass_packet
= pass_packet
;
2042 xfree (pass_packet
);
2046 /* If 'QCatchSyscalls' is supported, tell the remote stub
2047 to report syscalls to GDB. */
2050 remote_set_syscall_catchpoint (struct target_ops
*self
,
2051 int pid
, int needed
, int any_count
,
2052 int table_size
, int *table
)
2054 const char *catch_packet
;
2055 enum packet_result result
;
2058 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2060 /* Not supported. */
2064 if (needed
&& !any_count
)
2068 /* Count how many syscalls are to be caught (table[sysno] != 0). */
2069 for (i
= 0; i
< table_size
; i
++)
2078 fprintf_unfiltered (gdb_stdlog
,
2079 "remote_set_syscall_catchpoint "
2080 "pid %d needed %d any_count %d n_sysno %d\n",
2081 pid
, needed
, any_count
, n_sysno
);
2084 std::string built_packet
;
2087 /* Prepare a packet with the sysno list, assuming max 8+1
2088 characters for a sysno. If the resulting packet size is too
2089 big, fallback on the non-selective packet. */
2090 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2091 built_packet
.reserve (maxpktsz
);
2092 built_packet
= "QCatchSyscalls:1";
2095 /* Add in catch_packet each syscall to be caught (table[i] != 0). */
2096 for (int i
= 0; i
< table_size
; i
++)
2099 string_appendf (built_packet
, ";%x", i
);
2102 if (built_packet
.size () > get_remote_packet_size ())
2104 /* catch_packet too big. Fallback to less efficient
2105 non selective mode, with GDB doing the filtering. */
2106 catch_packet
= "QCatchSyscalls:1";
2109 catch_packet
= built_packet
.c_str ();
2112 catch_packet
= "QCatchSyscalls:0";
2114 struct remote_state
*rs
= get_remote_state ();
2116 putpkt (catch_packet
);
2117 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2118 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2119 if (result
== PACKET_OK
)
2125 /* If 'QProgramSignals' is supported, tell the remote stub what
2126 signals it should pass through to the inferior when detaching. */
2129 remote_program_signals (struct target_ops
*self
,
2130 int numsigs
, unsigned char *signals
)
2132 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2136 struct remote_state
*rs
= get_remote_state ();
2138 gdb_assert (numsigs
< 256);
2139 for (i
= 0; i
< numsigs
; i
++)
2144 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2145 strcpy (packet
, "QProgramSignals:");
2146 p
= packet
+ strlen (packet
);
2147 for (i
= 0; i
< numsigs
; i
++)
2149 if (signal_pass_state (i
))
2152 *p
++ = tohex (i
>> 4);
2153 *p
++ = tohex (i
& 15);
2162 if (!rs
->last_program_signals_packet
2163 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2166 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2167 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2168 xfree (rs
->last_program_signals_packet
);
2169 rs
->last_program_signals_packet
= packet
;
2176 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2177 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2178 thread. If GEN is set, set the general thread, if not, then set
2179 the step/continue thread. */
2181 set_thread (ptid_t ptid
, int gen
)
2183 struct remote_state
*rs
= get_remote_state ();
2184 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2185 char *buf
= rs
->buf
;
2186 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
2188 if (ptid_equal (state
, ptid
))
2192 *buf
++ = gen
? 'g' : 'c';
2193 if (ptid_equal (ptid
, magic_null_ptid
))
2194 xsnprintf (buf
, endbuf
- buf
, "0");
2195 else if (ptid_equal (ptid
, any_thread_ptid
))
2196 xsnprintf (buf
, endbuf
- buf
, "0");
2197 else if (ptid_equal (ptid
, minus_one_ptid
))
2198 xsnprintf (buf
, endbuf
- buf
, "-1");
2200 write_ptid (buf
, endbuf
, ptid
);
2202 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2204 rs
->general_thread
= ptid
;
2206 rs
->continue_thread
= ptid
;
2210 set_general_thread (ptid_t ptid
)
2212 set_thread (ptid
, 1);
2216 set_continue_thread (ptid_t ptid
)
2218 set_thread (ptid
, 0);
2221 /* Change the remote current process. Which thread within the process
2222 ends up selected isn't important, as long as it is the same process
2223 as what INFERIOR_PTID points to.
2225 This comes from that fact that there is no explicit notion of
2226 "selected process" in the protocol. The selected process for
2227 general operations is the process the selected general thread
2231 set_general_process (void)
2233 struct remote_state
*rs
= get_remote_state ();
2235 /* If the remote can't handle multiple processes, don't bother. */
2236 if (!remote_multi_process_p (rs
))
2239 /* We only need to change the remote current thread if it's pointing
2240 at some other process. */
2241 if (ptid_get_pid (rs
->general_thread
) != ptid_get_pid (inferior_ptid
))
2242 set_general_thread (inferior_ptid
);
2246 /* Return nonzero if this is the main thread that we made up ourselves
2247 to model non-threaded targets as single-threaded. */
2250 remote_thread_always_alive (struct target_ops
*ops
, ptid_t ptid
)
2252 if (ptid_equal (ptid
, magic_null_ptid
))
2253 /* The main thread is always alive. */
2256 if (ptid_get_pid (ptid
) != 0 && ptid_get_lwp (ptid
) == 0)
2257 /* The main thread is always alive. This can happen after a
2258 vAttach, if the remote side doesn't support
2265 /* Return nonzero if the thread PTID is still alive on the remote
2269 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
2271 struct remote_state
*rs
= get_remote_state ();
2274 /* Check if this is a thread that we made up ourselves to model
2275 non-threaded targets as single-threaded. */
2276 if (remote_thread_always_alive (ops
, ptid
))
2280 endp
= rs
->buf
+ get_remote_packet_size ();
2283 write_ptid (p
, endp
, ptid
);
2286 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2287 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2290 /* Return a pointer to a thread name if we know it and NULL otherwise.
2291 The thread_info object owns the memory for the name. */
2294 remote_thread_name (struct target_ops
*ops
, struct thread_info
*info
)
2296 if (info
->priv
!= NULL
)
2297 return info
->priv
->name
;
2302 /* About these extended threadlist and threadinfo packets. They are
2303 variable length packets but, the fields within them are often fixed
2304 length. They are redundent enough to send over UDP as is the
2305 remote protocol in general. There is a matching unit test module
2308 /* WARNING: This threadref data structure comes from the remote O.S.,
2309 libstub protocol encoding, and remote.c. It is not particularly
2312 /* Right now, the internal structure is int. We want it to be bigger.
2313 Plan to fix this. */
2315 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2317 /* gdb_ext_thread_info is an internal GDB data structure which is
2318 equivalent to the reply of the remote threadinfo packet. */
2320 struct gdb_ext_thread_info
2322 threadref threadid
; /* External form of thread reference. */
2323 int active
; /* Has state interesting to GDB?
2325 char display
[256]; /* Brief state display, name,
2326 blocked/suspended. */
2327 char shortname
[32]; /* To be used to name threads. */
2328 char more_display
[256]; /* Long info, statistics, queue depth,
2332 /* The volume of remote transfers can be limited by submitting
2333 a mask containing bits specifying the desired information.
2334 Use a union of these values as the 'selection' parameter to
2335 get_thread_info. FIXME: Make these TAG names more thread specific. */
2337 #define TAG_THREADID 1
2338 #define TAG_EXISTS 2
2339 #define TAG_DISPLAY 4
2340 #define TAG_THREADNAME 8
2341 #define TAG_MOREDISPLAY 16
2343 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2345 static char *unpack_nibble (char *buf
, int *val
);
2347 static char *unpack_byte (char *buf
, int *value
);
2349 static char *pack_int (char *buf
, int value
);
2351 static char *unpack_int (char *buf
, int *value
);
2353 static char *unpack_string (char *src
, char *dest
, int length
);
2355 static char *pack_threadid (char *pkt
, threadref
*id
);
2357 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2359 void int_to_threadref (threadref
*id
, int value
);
2361 static int threadref_to_int (threadref
*ref
);
2363 static void copy_threadref (threadref
*dest
, threadref
*src
);
2365 static int threadmatch (threadref
*dest
, threadref
*src
);
2367 static char *pack_threadinfo_request (char *pkt
, int mode
,
2370 static int remote_unpack_thread_info_response (char *pkt
,
2371 threadref
*expectedref
,
2372 struct gdb_ext_thread_info
2376 static int remote_get_threadinfo (threadref
*threadid
,
2377 int fieldset
, /*TAG mask */
2378 struct gdb_ext_thread_info
*info
);
2380 static char *pack_threadlist_request (char *pkt
, int startflag
,
2382 threadref
*nextthread
);
2384 static int parse_threadlist_response (char *pkt
,
2386 threadref
*original_echo
,
2387 threadref
*resultlist
,
2390 static int remote_get_threadlist (int startflag
,
2391 threadref
*nextthread
,
2395 threadref
*threadlist
);
2397 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
2399 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
2400 void *context
, int looplimit
);
2402 static int remote_newthread_step (threadref
*ref
, void *context
);
2405 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2406 buffer we're allowed to write to. Returns
2407 BUF+CHARACTERS_WRITTEN. */
2410 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2413 struct remote_state
*rs
= get_remote_state ();
2415 if (remote_multi_process_p (rs
))
2417 pid
= ptid_get_pid (ptid
);
2419 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2421 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2423 tid
= ptid_get_lwp (ptid
);
2425 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2427 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2432 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2433 last parsed char. Returns null_ptid if no thread id is found, and
2434 throws an error if the thread id has an invalid format. */
2437 read_ptid (const char *buf
, const char **obuf
)
2439 const char *p
= buf
;
2441 ULONGEST pid
= 0, tid
= 0;
2445 /* Multi-process ptid. */
2446 pp
= unpack_varlen_hex (p
+ 1, &pid
);
2448 error (_("invalid remote ptid: %s"), p
);
2451 pp
= unpack_varlen_hex (p
+ 1, &tid
);
2454 return ptid_build (pid
, tid
, 0);
2457 /* No multi-process. Just a tid. */
2458 pp
= unpack_varlen_hex (p
, &tid
);
2460 /* Return null_ptid when no thread id is found. */
2468 /* Since the stub is not sending a process id, then default to
2469 what's in inferior_ptid, unless it's null at this point. If so,
2470 then since there's no way to know the pid of the reported
2471 threads, use the magic number. */
2472 if (ptid_equal (inferior_ptid
, null_ptid
))
2473 pid
= ptid_get_pid (magic_null_ptid
);
2475 pid
= ptid_get_pid (inferior_ptid
);
2479 return ptid_build (pid
, tid
, 0);
2485 if (ch
>= 'a' && ch
<= 'f')
2486 return ch
- 'a' + 10;
2487 if (ch
>= '0' && ch
<= '9')
2489 if (ch
>= 'A' && ch
<= 'F')
2490 return ch
- 'A' + 10;
2495 stub_unpack_int (char *buff
, int fieldlength
)
2502 nibble
= stubhex (*buff
++);
2506 retval
= retval
<< 4;
2512 unpack_nibble (char *buf
, int *val
)
2514 *val
= fromhex (*buf
++);
2519 unpack_byte (char *buf
, int *value
)
2521 *value
= stub_unpack_int (buf
, 2);
2526 pack_int (char *buf
, int value
)
2528 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
2529 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
2530 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
2531 buf
= pack_hex_byte (buf
, (value
& 0xff));
2536 unpack_int (char *buf
, int *value
)
2538 *value
= stub_unpack_int (buf
, 8);
2542 #if 0 /* Currently unused, uncomment when needed. */
2543 static char *pack_string (char *pkt
, char *string
);
2546 pack_string (char *pkt
, char *string
)
2551 len
= strlen (string
);
2553 len
= 200; /* Bigger than most GDB packets, junk??? */
2554 pkt
= pack_hex_byte (pkt
, len
);
2558 if ((ch
== '\0') || (ch
== '#'))
2559 ch
= '*'; /* Protect encapsulation. */
2564 #endif /* 0 (unused) */
2567 unpack_string (char *src
, char *dest
, int length
)
2576 pack_threadid (char *pkt
, threadref
*id
)
2579 unsigned char *altid
;
2581 altid
= (unsigned char *) id
;
2582 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
2584 pkt
= pack_hex_byte (pkt
, *altid
++);
2590 unpack_threadid (char *inbuf
, threadref
*id
)
2593 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
2596 altref
= (char *) id
;
2598 while (inbuf
< limit
)
2600 x
= stubhex (*inbuf
++);
2601 y
= stubhex (*inbuf
++);
2602 *altref
++ = (x
<< 4) | y
;
2607 /* Externally, threadrefs are 64 bits but internally, they are still
2608 ints. This is due to a mismatch of specifications. We would like
2609 to use 64bit thread references internally. This is an adapter
2613 int_to_threadref (threadref
*id
, int value
)
2615 unsigned char *scan
;
2617 scan
= (unsigned char *) id
;
2623 *scan
++ = (value
>> 24) & 0xff;
2624 *scan
++ = (value
>> 16) & 0xff;
2625 *scan
++ = (value
>> 8) & 0xff;
2626 *scan
++ = (value
& 0xff);
2630 threadref_to_int (threadref
*ref
)
2633 unsigned char *scan
;
2639 value
= (value
<< 8) | ((*scan
++) & 0xff);
2644 copy_threadref (threadref
*dest
, threadref
*src
)
2647 unsigned char *csrc
, *cdest
;
2649 csrc
= (unsigned char *) src
;
2650 cdest
= (unsigned char *) dest
;
2657 threadmatch (threadref
*dest
, threadref
*src
)
2659 /* Things are broken right now, so just assume we got a match. */
2661 unsigned char *srcp
, *destp
;
2663 srcp
= (char *) src
;
2664 destp
= (char *) dest
;
2668 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
2675 threadid:1, # always request threadid
2682 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2685 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
2687 *pkt
++ = 'q'; /* Info Query */
2688 *pkt
++ = 'P'; /* process or thread info */
2689 pkt
= pack_int (pkt
, mode
); /* mode */
2690 pkt
= pack_threadid (pkt
, id
); /* threadid */
2691 *pkt
= '\0'; /* terminate */
2695 /* These values tag the fields in a thread info response packet. */
2696 /* Tagging the fields allows us to request specific fields and to
2697 add more fields as time goes by. */
2699 #define TAG_THREADID 1 /* Echo the thread identifier. */
2700 #define TAG_EXISTS 2 /* Is this process defined enough to
2701 fetch registers and its stack? */
2702 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2703 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2704 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2708 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
2709 struct gdb_ext_thread_info
*info
)
2711 struct remote_state
*rs
= get_remote_state ();
2715 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
2718 /* info->threadid = 0; FIXME: implement zero_threadref. */
2720 info
->display
[0] = '\0';
2721 info
->shortname
[0] = '\0';
2722 info
->more_display
[0] = '\0';
2724 /* Assume the characters indicating the packet type have been
2726 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
2727 pkt
= unpack_threadid (pkt
, &ref
);
2730 warning (_("Incomplete response to threadinfo request."));
2731 if (!threadmatch (&ref
, expectedref
))
2732 { /* This is an answer to a different request. */
2733 warning (_("ERROR RMT Thread info mismatch."));
2736 copy_threadref (&info
->threadid
, &ref
);
2738 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2740 /* Packets are terminated with nulls. */
2741 while ((pkt
< limit
) && mask
&& *pkt
)
2743 pkt
= unpack_int (pkt
, &tag
); /* tag */
2744 pkt
= unpack_byte (pkt
, &length
); /* length */
2745 if (!(tag
& mask
)) /* Tags out of synch with mask. */
2747 warning (_("ERROR RMT: threadinfo tag mismatch."));
2751 if (tag
== TAG_THREADID
)
2755 warning (_("ERROR RMT: length of threadid is not 16."));
2759 pkt
= unpack_threadid (pkt
, &ref
);
2760 mask
= mask
& ~TAG_THREADID
;
2763 if (tag
== TAG_EXISTS
)
2765 info
->active
= stub_unpack_int (pkt
, length
);
2767 mask
= mask
& ~(TAG_EXISTS
);
2770 warning (_("ERROR RMT: 'exists' length too long."));
2776 if (tag
== TAG_THREADNAME
)
2778 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
2779 mask
= mask
& ~TAG_THREADNAME
;
2782 if (tag
== TAG_DISPLAY
)
2784 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
2785 mask
= mask
& ~TAG_DISPLAY
;
2788 if (tag
== TAG_MOREDISPLAY
)
2790 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2791 mask
= mask
& ~TAG_MOREDISPLAY
;
2794 warning (_("ERROR RMT: unknown thread info tag."));
2795 break; /* Not a tag we know about. */
2801 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2802 struct gdb_ext_thread_info
*info
)
2804 struct remote_state
*rs
= get_remote_state ();
2807 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2809 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2811 if (rs
->buf
[0] == '\0')
2814 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2819 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2822 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2823 threadref
*nextthread
)
2825 *pkt
++ = 'q'; /* info query packet */
2826 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2827 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2828 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2829 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2834 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2837 parse_threadlist_response (char *pkt
, int result_limit
,
2838 threadref
*original_echo
, threadref
*resultlist
,
2841 struct remote_state
*rs
= get_remote_state ();
2843 int count
, resultcount
, done
;
2846 /* Assume the 'q' and 'M chars have been stripped. */
2847 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2848 /* done parse past here */
2849 pkt
= unpack_byte (pkt
, &count
); /* count field */
2850 pkt
= unpack_nibble (pkt
, &done
);
2851 /* The first threadid is the argument threadid. */
2852 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2853 while ((count
-- > 0) && (pkt
< limit
))
2855 pkt
= unpack_threadid (pkt
, resultlist
++);
2856 if (resultcount
++ >= result_limit
)
2864 /* Fetch the next batch of threads from the remote. Returns -1 if the
2865 qL packet is not supported, 0 on error and 1 on success. */
2868 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2869 int *done
, int *result_count
, threadref
*threadlist
)
2871 struct remote_state
*rs
= get_remote_state ();
2874 /* Trancate result limit to be smaller than the packet size. */
2875 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
2876 >= get_remote_packet_size ())
2877 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2879 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2881 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2882 if (*rs
->buf
== '\0')
2884 /* Packet not supported. */
2889 parse_threadlist_response (rs
->buf
+ 2, result_limit
,
2890 &rs
->echo_nextthread
, threadlist
, done
);
2892 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
2894 /* FIXME: This is a good reason to drop the packet. */
2895 /* Possably, there is a duplicate response. */
2897 retransmit immediatly - race conditions
2898 retransmit after timeout - yes
2900 wait for packet, then exit
2902 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2903 return 0; /* I choose simply exiting. */
2905 if (*result_count
<= 0)
2909 warning (_("RMT ERROR : failed to get remote thread list."));
2912 return result
; /* break; */
2914 if (*result_count
> result_limit
)
2917 warning (_("RMT ERROR: threadlist response longer than requested."));
2923 /* Fetch the list of remote threads, with the qL packet, and call
2924 STEPFUNCTION for each thread found. Stops iterating and returns 1
2925 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2926 STEPFUNCTION returns false. If the packet is not supported,
2930 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2933 struct remote_state
*rs
= get_remote_state ();
2934 int done
, i
, result_count
;
2942 if (loopcount
++ > looplimit
)
2945 warning (_("Remote fetch threadlist -infinite loop-."));
2948 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
2949 MAXTHREADLISTRESULTS
,
2950 &done
, &result_count
,
2951 rs
->resultthreadlist
);
2954 /* Clear for later iterations. */
2956 /* Setup to resume next batch of thread references, set nextthread. */
2957 if (result_count
>= 1)
2958 copy_threadref (&rs
->nextthread
,
2959 &rs
->resultthreadlist
[result_count
- 1]);
2961 while (result_count
--)
2963 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
2973 /* A thread found on the remote target. */
2975 typedef struct thread_item
2977 /* The thread's PTID. */
2980 /* The thread's extra info. May be NULL. */
2983 /* The thread's name. May be NULL. */
2986 /* The core the thread was running on. -1 if not known. */
2989 /* The thread handle associated with the thread. */
2990 gdb::byte_vector
*thread_handle
;
2993 DEF_VEC_O(thread_item_t
);
2995 /* Context passed around to the various methods listing remote
2996 threads. As new threads are found, they're added to the ITEMS
2999 struct threads_listing_context
3001 /* The threads found on the remote target. */
3002 VEC (thread_item_t
) *items
;
3005 /* Discard the contents of the constructed thread listing context. */
3008 clear_threads_listing_context (void *p
)
3010 struct threads_listing_context
*context
3011 = (struct threads_listing_context
*) p
;
3013 struct thread_item
*item
;
3015 for (i
= 0; VEC_iterate (thread_item_t
, context
->items
, i
, item
); ++i
)
3017 xfree (item
->extra
);
3019 delete item
->thread_handle
;
3022 VEC_free (thread_item_t
, context
->items
);
3025 /* Remove the thread specified as the related_pid field of WS
3026 from the CONTEXT list. */
3029 threads_listing_context_remove (struct target_waitstatus
*ws
,
3030 struct threads_listing_context
*context
)
3032 struct thread_item
*item
;
3034 ptid_t child_ptid
= ws
->value
.related_pid
;
3036 for (i
= 0; VEC_iterate (thread_item_t
, context
->items
, i
, item
); ++i
)
3038 if (ptid_equal (item
->ptid
, child_ptid
))
3040 VEC_ordered_remove (thread_item_t
, context
->items
, i
);
3047 remote_newthread_step (threadref
*ref
, void *data
)
3049 struct threads_listing_context
*context
3050 = (struct threads_listing_context
*) data
;
3051 struct thread_item item
;
3052 int pid
= ptid_get_pid (inferior_ptid
);
3054 item
.ptid
= ptid_build (pid
, threadref_to_int (ref
), 0);
3058 item
.thread_handle
= nullptr;
3060 VEC_safe_push (thread_item_t
, context
->items
, &item
);
3062 return 1; /* continue iterator */
3065 #define CRAZY_MAX_THREADS 1000
3068 remote_current_thread (ptid_t oldpid
)
3070 struct remote_state
*rs
= get_remote_state ();
3073 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3074 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3079 result
= read_ptid (&rs
->buf
[2], &obuf
);
3080 if (*obuf
!= '\0' && remote_debug
)
3081 fprintf_unfiltered (gdb_stdlog
,
3082 "warning: garbage in qC reply\n");
3090 /* List remote threads using the deprecated qL packet. */
3093 remote_get_threads_with_ql (struct target_ops
*ops
,
3094 struct threads_listing_context
*context
)
3096 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3097 CRAZY_MAX_THREADS
) >= 0)
3103 #if defined(HAVE_LIBEXPAT)
3106 start_thread (struct gdb_xml_parser
*parser
,
3107 const struct gdb_xml_element
*element
,
3108 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
3110 struct threads_listing_context
*data
3111 = (struct threads_listing_context
*) user_data
;
3113 struct thread_item item
;
3115 struct gdb_xml_value
*attr
;
3117 id
= (char *) xml_find_attribute (attributes
, "id")->value
;
3118 item
.ptid
= read_ptid (id
, NULL
);
3120 attr
= xml_find_attribute (attributes
, "core");
3122 item
.core
= *(ULONGEST
*) attr
->value
;
3126 attr
= xml_find_attribute (attributes
, "name");
3127 item
.name
= attr
!= NULL
? xstrdup ((const char *) attr
->value
) : NULL
;
3129 attr
= xml_find_attribute (attributes
, "handle");
3132 item
.thread_handle
= new gdb::byte_vector
3133 (strlen ((const char *) attr
->value
) / 2);
3134 hex2bin ((const char *) attr
->value
, item
.thread_handle
->data (),
3135 item
.thread_handle
->size ());
3138 item
.thread_handle
= nullptr;
3142 VEC_safe_push (thread_item_t
, data
->items
, &item
);
3146 end_thread (struct gdb_xml_parser
*parser
,
3147 const struct gdb_xml_element
*element
,
3148 void *user_data
, const char *body_text
)
3150 struct threads_listing_context
*data
3151 = (struct threads_listing_context
*) user_data
;
3153 if (body_text
&& *body_text
)
3154 VEC_last (thread_item_t
, data
->items
)->extra
= xstrdup (body_text
);
3157 const struct gdb_xml_attribute thread_attributes
[] = {
3158 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3159 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3160 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3161 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3162 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3165 const struct gdb_xml_element thread_children
[] = {
3166 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3169 const struct gdb_xml_element threads_children
[] = {
3170 { "thread", thread_attributes
, thread_children
,
3171 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3172 start_thread
, end_thread
},
3173 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3176 const struct gdb_xml_element threads_elements
[] = {
3177 { "threads", NULL
, threads_children
,
3178 GDB_XML_EF_NONE
, NULL
, NULL
},
3179 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3184 /* List remote threads using qXfer:threads:read. */
3187 remote_get_threads_with_qxfer (struct target_ops
*ops
,
3188 struct threads_listing_context
*context
)
3190 #if defined(HAVE_LIBEXPAT)
3191 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3193 gdb::unique_xmalloc_ptr
<char> xml
3194 = target_read_stralloc (ops
, TARGET_OBJECT_THREADS
, NULL
);
3196 if (xml
!= NULL
&& *xml
!= '\0')
3198 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3199 threads_elements
, xml
.get (), context
);
3209 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3212 remote_get_threads_with_qthreadinfo (struct target_ops
*ops
,
3213 struct threads_listing_context
*context
)
3215 struct remote_state
*rs
= get_remote_state ();
3217 if (rs
->use_threadinfo_query
)
3221 putpkt ("qfThreadInfo");
3222 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3224 if (bufp
[0] != '\0') /* q packet recognized */
3226 while (*bufp
++ == 'm') /* reply contains one or more TID */
3230 struct thread_item item
;
3232 item
.ptid
= read_ptid (bufp
, &bufp
);
3236 item
.thread_handle
= nullptr;
3238 VEC_safe_push (thread_item_t
, context
->items
, &item
);
3240 while (*bufp
++ == ','); /* comma-separated list */
3241 putpkt ("qsThreadInfo");
3242 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3249 /* Packet not recognized. */
3250 rs
->use_threadinfo_query
= 0;
3257 /* Implement the to_update_thread_list function for the remote
3261 remote_update_thread_list (struct target_ops
*ops
)
3263 struct threads_listing_context context
;
3264 struct cleanup
*old_chain
;
3267 context
.items
= NULL
;
3268 old_chain
= make_cleanup (clear_threads_listing_context
, &context
);
3270 /* We have a few different mechanisms to fetch the thread list. Try
3271 them all, starting with the most preferred one first, falling
3272 back to older methods. */
3273 if (remote_get_threads_with_qxfer (ops
, &context
)
3274 || remote_get_threads_with_qthreadinfo (ops
, &context
)
3275 || remote_get_threads_with_ql (ops
, &context
))
3278 struct thread_item
*item
;
3279 struct thread_info
*tp
, *tmp
;
3283 if (VEC_empty (thread_item_t
, context
.items
)
3284 && remote_thread_always_alive (ops
, inferior_ptid
))
3286 /* Some targets don't really support threads, but still
3287 reply an (empty) thread list in response to the thread
3288 listing packets, instead of replying "packet not
3289 supported". Exit early so we don't delete the main
3291 do_cleanups (old_chain
);
3295 /* CONTEXT now holds the current thread list on the remote
3296 target end. Delete GDB-side threads no longer found on the
3298 ALL_THREADS_SAFE (tp
, tmp
)
3301 VEC_iterate (thread_item_t
, context
.items
, i
, item
);
3304 if (ptid_equal (item
->ptid
, tp
->ptid
))
3308 if (i
== VEC_length (thread_item_t
, context
.items
))
3311 delete_thread (tp
->ptid
);
3315 /* Remove any unreported fork child threads from CONTEXT so
3316 that we don't interfere with follow fork, which is where
3317 creation of such threads is handled. */
3318 remove_new_fork_children (&context
);
3320 /* And now add threads we don't know about yet to our list. */
3322 VEC_iterate (thread_item_t
, context
.items
, i
, item
);
3325 if (!ptid_equal (item
->ptid
, null_ptid
))
3327 struct private_thread_info
*info
;
3328 /* In non-stop mode, we assume new found threads are
3329 executing until proven otherwise with a stop reply.
3330 In all-stop, we can only get here if all threads are
3332 int executing
= target_is_non_stop_p () ? 1 : 0;
3334 remote_notice_new_inferior (item
->ptid
, executing
);
3336 info
= get_private_info_ptid (item
->ptid
);
3337 info
->core
= item
->core
;
3338 info
->extra
= item
->extra
;
3340 info
->name
= item
->name
;
3342 info
->thread_handle
= item
->thread_handle
;
3343 item
->thread_handle
= nullptr;
3350 /* If no thread listing method is supported, then query whether
3351 each known thread is alive, one by one, with the T packet.
3352 If the target doesn't support threads at all, then this is a
3353 no-op. See remote_thread_alive. */
3357 do_cleanups (old_chain
);
3361 * Collect a descriptive string about the given thread.
3362 * The target may say anything it wants to about the thread
3363 * (typically info about its blocked / runnable state, name, etc.).
3364 * This string will appear in the info threads display.
3366 * Optional: targets are not required to implement this function.
3370 remote_threads_extra_info (struct target_ops
*self
, struct thread_info
*tp
)
3372 struct remote_state
*rs
= get_remote_state ();
3376 struct gdb_ext_thread_info threadinfo
;
3377 static char display_buf
[100]; /* arbitrary... */
3378 int n
= 0; /* position in display_buf */
3380 if (rs
->remote_desc
== 0) /* paranoia */
3381 internal_error (__FILE__
, __LINE__
,
3382 _("remote_threads_extra_info"));
3384 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
3385 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_lwp (tp
->ptid
) == 0))
3386 /* This is the main thread which was added by GDB. The remote
3387 server doesn't know about it. */
3390 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3392 struct thread_info
*info
= find_thread_ptid (tp
->ptid
);
3394 if (info
&& info
->priv
)
3395 return info
->priv
->extra
;
3400 if (rs
->use_threadextra_query
)
3403 char *endb
= rs
->buf
+ get_remote_packet_size ();
3405 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3407 write_ptid (b
, endb
, tp
->ptid
);
3410 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3411 if (rs
->buf
[0] != 0)
3413 n
= std::min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
3414 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
3415 display_buf
[result
] = '\0';
3420 /* If the above query fails, fall back to the old method. */
3421 rs
->use_threadextra_query
= 0;
3422 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3423 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3424 int_to_threadref (&id
, ptid_get_lwp (tp
->ptid
));
3425 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3426 if (threadinfo
.active
)
3428 if (*threadinfo
.shortname
)
3429 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
3430 " Name: %s,", threadinfo
.shortname
);
3431 if (*threadinfo
.display
)
3432 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3433 " State: %s,", threadinfo
.display
);
3434 if (*threadinfo
.more_display
)
3435 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3436 " Priority: %s", threadinfo
.more_display
);
3440 /* For purely cosmetic reasons, clear up trailing commas. */
3441 if (',' == display_buf
[n
-1])
3442 display_buf
[n
-1] = ' ';
3451 remote_static_tracepoint_marker_at (struct target_ops
*self
, CORE_ADDR addr
,
3452 struct static_tracepoint_marker
*marker
)
3454 struct remote_state
*rs
= get_remote_state ();
3457 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3459 p
+= hexnumstr (p
, addr
);
3461 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3465 error (_("Remote failure reply: %s"), p
);
3469 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
3476 static VEC(static_tracepoint_marker_p
) *
3477 remote_static_tracepoint_markers_by_strid (struct target_ops
*self
,
3480 struct remote_state
*rs
= get_remote_state ();
3481 VEC(static_tracepoint_marker_p
) *markers
= NULL
;
3482 struct static_tracepoint_marker
*marker
= NULL
;
3483 struct cleanup
*old_chain
;
3486 /* Ask for a first packet of static tracepoint marker
3489 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3492 error (_("Remote failure reply: %s"), p
);
3494 old_chain
= make_cleanup (free_current_marker
, &marker
);
3499 marker
= XCNEW (struct static_tracepoint_marker
);
3503 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
3505 if (strid
== NULL
|| strcmp (strid
, marker
->str_id
) == 0)
3507 VEC_safe_push (static_tracepoint_marker_p
,
3513 release_static_tracepoint_marker (marker
);
3514 memset (marker
, 0, sizeof (*marker
));
3517 while (*p
++ == ','); /* comma-separated list */
3518 /* Ask for another packet of static tracepoint definition. */
3520 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3524 do_cleanups (old_chain
);
3529 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3532 remote_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long thread
)
3534 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, 0);
3538 /* Restart the remote side; this is an extended protocol operation. */
3541 extended_remote_restart (void)
3543 struct remote_state
*rs
= get_remote_state ();
3545 /* Send the restart command; for reasons I don't understand the
3546 remote side really expects a number after the "R". */
3547 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
3550 remote_fileio_reset ();
3553 /* Clean up connection to a remote debugger. */
3556 remote_close (struct target_ops
*self
)
3558 struct remote_state
*rs
= get_remote_state ();
3560 if (rs
->remote_desc
== NULL
)
3561 return; /* already closed */
3563 /* Make sure we leave stdin registered in the event loop. */
3564 remote_terminal_ours (self
);
3566 serial_close (rs
->remote_desc
);
3567 rs
->remote_desc
= NULL
;
3569 /* We don't have a connection to the remote stub anymore. Get rid
3570 of all the inferiors and their threads we were controlling.
3571 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3572 will be unable to find the thread corresponding to (pid, 0, 0). */
3573 inferior_ptid
= null_ptid
;
3574 discard_all_inferiors ();
3576 /* We are closing the remote target, so we should discard
3577 everything of this target. */
3578 discard_pending_stop_replies_in_queue (rs
);
3580 if (remote_async_inferior_event_token
)
3581 delete_async_event_handler (&remote_async_inferior_event_token
);
3583 remote_notif_state_xfree (rs
->notif_state
);
3585 trace_reset_local_state ();
3588 /* Query the remote side for the text, data and bss offsets. */
3593 struct remote_state
*rs
= get_remote_state ();
3596 int lose
, num_segments
= 0, do_sections
, do_segments
;
3597 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
3598 struct section_offsets
*offs
;
3599 struct symfile_segment_data
*data
;
3601 if (symfile_objfile
== NULL
)
3604 putpkt ("qOffsets");
3605 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3608 if (buf
[0] == '\000')
3609 return; /* Return silently. Stub doesn't support
3613 warning (_("Remote failure reply: %s"), buf
);
3617 /* Pick up each field in turn. This used to be done with scanf, but
3618 scanf will make trouble if CORE_ADDR size doesn't match
3619 conversion directives correctly. The following code will work
3620 with any size of CORE_ADDR. */
3621 text_addr
= data_addr
= bss_addr
= 0;
3625 if (startswith (ptr
, "Text="))
3628 /* Don't use strtol, could lose on big values. */
3629 while (*ptr
&& *ptr
!= ';')
3630 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3632 if (startswith (ptr
, ";Data="))
3635 while (*ptr
&& *ptr
!= ';')
3636 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3641 if (!lose
&& startswith (ptr
, ";Bss="))
3644 while (*ptr
&& *ptr
!= ';')
3645 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
3647 if (bss_addr
!= data_addr
)
3648 warning (_("Target reported unsupported offsets: %s"), buf
);
3653 else if (startswith (ptr
, "TextSeg="))
3656 /* Don't use strtol, could lose on big values. */
3657 while (*ptr
&& *ptr
!= ';')
3658 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3661 if (startswith (ptr
, ";DataSeg="))
3664 while (*ptr
&& *ptr
!= ';')
3665 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3673 error (_("Malformed response to offset query, %s"), buf
);
3674 else if (*ptr
!= '\0')
3675 warning (_("Target reported unsupported offsets: %s"), buf
);
3677 offs
= ((struct section_offsets
*)
3678 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
3679 memcpy (offs
, symfile_objfile
->section_offsets
,
3680 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
3682 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
3683 do_segments
= (data
!= NULL
);
3684 do_sections
= num_segments
== 0;
3686 if (num_segments
> 0)
3688 segments
[0] = text_addr
;
3689 segments
[1] = data_addr
;
3691 /* If we have two segments, we can still try to relocate everything
3692 by assuming that the .text and .data offsets apply to the whole
3693 text and data segments. Convert the offsets given in the packet
3694 to base addresses for symfile_map_offsets_to_segments. */
3695 else if (data
&& data
->num_segments
== 2)
3697 segments
[0] = data
->segment_bases
[0] + text_addr
;
3698 segments
[1] = data
->segment_bases
[1] + data_addr
;
3701 /* If the object file has only one segment, assume that it is text
3702 rather than data; main programs with no writable data are rare,
3703 but programs with no code are useless. Of course the code might
3704 have ended up in the data segment... to detect that we would need
3705 the permissions here. */
3706 else if (data
&& data
->num_segments
== 1)
3708 segments
[0] = data
->segment_bases
[0] + text_addr
;
3711 /* There's no way to relocate by segment. */
3717 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
3718 offs
, num_segments
, segments
);
3720 if (ret
== 0 && !do_sections
)
3721 error (_("Can not handle qOffsets TextSeg "
3722 "response with this symbol file"));
3729 free_symfile_segment_data (data
);
3733 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
3735 /* This is a temporary kludge to force data and bss to use the
3736 same offsets because that's what nlmconv does now. The real
3737 solution requires changes to the stub and remote.c that I
3738 don't have time to do right now. */
3740 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
3741 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
3744 objfile_relocate (symfile_objfile
, offs
);
3747 /* Send interrupt_sequence to remote target. */
3749 send_interrupt_sequence (void)
3751 struct remote_state
*rs
= get_remote_state ();
3753 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3754 remote_serial_write ("\x03", 1);
3755 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3756 serial_send_break (rs
->remote_desc
);
3757 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3759 serial_send_break (rs
->remote_desc
);
3760 remote_serial_write ("g", 1);
3763 internal_error (__FILE__
, __LINE__
,
3764 _("Invalid value for interrupt_sequence_mode: %s."),
3765 interrupt_sequence_mode
);
3769 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3770 and extract the PTID. Returns NULL_PTID if not found. */
3773 stop_reply_extract_thread (char *stop_reply
)
3775 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
3779 /* Txx r:val ; r:val (...) */
3782 /* Look for "register" named "thread". */
3787 p1
= strchr (p
, ':');
3791 if (strncmp (p
, "thread", p1
- p
) == 0)
3792 return read_ptid (++p1
, &p
);
3794 p1
= strchr (p
, ';');
3806 /* Determine the remote side's current thread. If we have a stop
3807 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3808 "thread" register we can extract the current thread from. If not,
3809 ask the remote which is the current thread with qC. The former
3810 method avoids a roundtrip. */
3813 get_current_thread (char *wait_status
)
3815 ptid_t ptid
= null_ptid
;
3817 /* Note we don't use remote_parse_stop_reply as that makes use of
3818 the target architecture, which we haven't yet fully determined at
3820 if (wait_status
!= NULL
)
3821 ptid
= stop_reply_extract_thread (wait_status
);
3822 if (ptid_equal (ptid
, null_ptid
))
3823 ptid
= remote_current_thread (inferior_ptid
);
3828 /* Query the remote target for which is the current thread/process,
3829 add it to our tables, and update INFERIOR_PTID. The caller is
3830 responsible for setting the state such that the remote end is ready
3831 to return the current thread.
3833 This function is called after handling the '?' or 'vRun' packets,
3834 whose response is a stop reply from which we can also try
3835 extracting the thread. If the target doesn't support the explicit
3836 qC query, we infer the current thread from that stop reply, passed
3837 in in WAIT_STATUS, which may be NULL. */
3840 add_current_inferior_and_thread (char *wait_status
)
3842 struct remote_state
*rs
= get_remote_state ();
3845 inferior_ptid
= null_ptid
;
3847 /* Now, if we have thread information, update inferior_ptid. */
3848 ptid_t curr_ptid
= get_current_thread (wait_status
);
3850 if (curr_ptid
!= null_ptid
)
3852 if (!remote_multi_process_p (rs
))
3857 /* Without this, some commands which require an active target
3858 (such as kill) won't work. This variable serves (at least)
3859 double duty as both the pid of the target process (if it has
3860 such), and as a flag indicating that a target is active. */
3861 curr_ptid
= magic_null_ptid
;
3865 remote_add_inferior (fake_pid_p
, ptid_get_pid (curr_ptid
), -1, 1);
3867 /* Add the main thread and switch to it. Don't try reading
3868 registers yet, since we haven't fetched the target description
3870 thread_info
*tp
= add_thread_silent (curr_ptid
);
3871 switch_to_thread_no_regs (tp
);
3874 /* Print info about a thread that was found already stopped on
3878 print_one_stopped_thread (struct thread_info
*thread
)
3880 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
3882 switch_to_thread (thread
->ptid
);
3883 stop_pc
= get_frame_pc (get_current_frame ());
3884 set_current_sal_from_frame (get_current_frame ());
3886 thread
->suspend
.waitstatus_pending_p
= 0;
3888 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
3890 enum gdb_signal sig
= ws
->value
.sig
;
3892 if (signal_print_state (sig
))
3893 observer_notify_signal_received (sig
);
3895 observer_notify_normal_stop (NULL
, 1);
3898 /* Process all initial stop replies the remote side sent in response
3899 to the ? packet. These indicate threads that were already stopped
3900 on initial connection. We mark these threads as stopped and print
3901 their current frame before giving the user the prompt. */
3904 process_initial_stop_replies (int from_tty
)
3906 int pending_stop_replies
= stop_reply_queue_length ();
3907 struct inferior
*inf
;
3908 struct thread_info
*thread
;
3909 struct thread_info
*selected
= NULL
;
3910 struct thread_info
*lowest_stopped
= NULL
;
3911 struct thread_info
*first
= NULL
;
3913 /* Consume the initial pending events. */
3914 while (pending_stop_replies
-- > 0)
3916 ptid_t waiton_ptid
= minus_one_ptid
;
3918 struct target_waitstatus ws
;
3919 int ignore_event
= 0;
3920 struct thread_info
*thread
;
3922 memset (&ws
, 0, sizeof (ws
));
3923 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
3925 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
3929 case TARGET_WAITKIND_IGNORE
:
3930 case TARGET_WAITKIND_NO_RESUMED
:
3931 case TARGET_WAITKIND_SIGNALLED
:
3932 case TARGET_WAITKIND_EXITED
:
3933 /* We shouldn't see these, but if we do, just ignore. */
3935 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
3939 case TARGET_WAITKIND_EXECD
:
3940 xfree (ws
.value
.execd_pathname
);
3949 thread
= find_thread_ptid (event_ptid
);
3951 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
3953 enum gdb_signal sig
= ws
.value
.sig
;
3955 /* Stubs traditionally report SIGTRAP as initial signal,
3956 instead of signal 0. Suppress it. */
3957 if (sig
== GDB_SIGNAL_TRAP
)
3959 thread
->suspend
.stop_signal
= sig
;
3963 thread
->suspend
.waitstatus
= ws
;
3965 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
3966 || ws
.value
.sig
!= GDB_SIGNAL_0
)
3967 thread
->suspend
.waitstatus_pending_p
= 1;
3969 set_executing (event_ptid
, 0);
3970 set_running (event_ptid
, 0);
3971 thread
->priv
->vcont_resumed
= 0;
3974 /* "Notice" the new inferiors before anything related to
3975 registers/memory. */
3981 inf
->needs_setup
= 1;
3985 thread
= any_live_thread_of_process (inf
->pid
);
3986 notice_new_inferior (thread
->ptid
,
3987 thread
->state
== THREAD_RUNNING
,
3992 /* If all-stop on top of non-stop, pause all threads. Note this
3993 records the threads' stop pc, so must be done after "noticing"
3997 stop_all_threads ();
3999 /* If all threads of an inferior were already stopped, we
4000 haven't setup the inferior yet. */
4006 if (inf
->needs_setup
)
4008 thread
= any_live_thread_of_process (inf
->pid
);
4009 switch_to_thread_no_regs (thread
);
4015 /* Now go over all threads that are stopped, and print their current
4016 frame. If all-stop, then if there's a signalled thread, pick
4018 ALL_NON_EXITED_THREADS (thread
)
4024 set_running (thread
->ptid
, 0);
4025 else if (thread
->state
!= THREAD_STOPPED
)
4028 if (selected
== NULL
4029 && thread
->suspend
.waitstatus_pending_p
)
4032 if (lowest_stopped
== NULL
4033 || thread
->inf
->num
< lowest_stopped
->inf
->num
4034 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4035 lowest_stopped
= thread
;
4038 print_one_stopped_thread (thread
);
4041 /* In all-stop, we only print the status of one thread, and leave
4042 others with their status pending. */
4047 thread
= lowest_stopped
;
4051 print_one_stopped_thread (thread
);
4054 /* For "info program". */
4055 thread
= inferior_thread ();
4056 if (thread
->state
== THREAD_STOPPED
)
4057 set_last_target_status (inferior_ptid
, thread
->suspend
.waitstatus
);
4060 /* Start the remote connection and sync state. */
4063 remote_start_remote (int from_tty
, struct target_ops
*target
, int extended_p
)
4065 struct remote_state
*rs
= get_remote_state ();
4066 struct packet_config
*noack_config
;
4067 char *wait_status
= NULL
;
4069 /* Signal other parts that we're going through the initial setup,
4070 and so things may not be stable yet. E.g., we don't try to
4071 install tracepoints until we've relocated symbols. Also, a
4072 Ctrl-C before we're connected and synced up can't interrupt the
4073 target. Instead, it offers to drop the (potentially wedged)
4075 rs
->starting_up
= 1;
4079 if (interrupt_on_connect
)
4080 send_interrupt_sequence ();
4082 /* Ack any packet which the remote side has already sent. */
4083 remote_serial_write ("+", 1);
4085 /* The first packet we send to the target is the optional "supported
4086 packets" request. If the target can answer this, it will tell us
4087 which later probes to skip. */
4088 remote_query_supported ();
4090 /* If the stub wants to get a QAllow, compose one and send it. */
4091 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4092 remote_set_permissions (target
);
4094 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4095 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4096 as a reply to known packet. For packet "vFile:setfs:" it is an
4097 invalid reply and GDB would return error in
4098 remote_hostio_set_filesystem, making remote files access impossible.
4099 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4100 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4102 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4104 putpkt (v_mustreplyempty
);
4105 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4106 if (strcmp (rs
->buf
, "OK") == 0)
4107 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4108 else if (strcmp (rs
->buf
, "") != 0)
4109 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4113 /* Next, we possibly activate noack mode.
4115 If the QStartNoAckMode packet configuration is set to AUTO,
4116 enable noack mode if the stub reported a wish for it with
4119 If set to TRUE, then enable noack mode even if the stub didn't
4120 report it in qSupported. If the stub doesn't reply OK, the
4121 session ends with an error.
4123 If FALSE, then don't activate noack mode, regardless of what the
4124 stub claimed should be the default with qSupported. */
4126 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4127 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4129 putpkt ("QStartNoAckMode");
4130 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4131 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4137 /* Tell the remote that we are using the extended protocol. */
4139 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4142 /* Let the target know which signals it is allowed to pass down to
4144 update_signals_program_target ();
4146 /* Next, if the target can specify a description, read it. We do
4147 this before anything involving memory or registers. */
4148 target_find_description ();
4150 /* Next, now that we know something about the target, update the
4151 address spaces in the program spaces. */
4152 update_address_spaces ();
4154 /* On OSs where the list of libraries is global to all
4155 processes, we fetch them early. */
4156 if (gdbarch_has_global_solist (target_gdbarch ()))
4157 solib_add (NULL
, from_tty
, auto_solib_add
);
4159 if (target_is_non_stop_p ())
4161 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4162 error (_("Non-stop mode requested, but remote "
4163 "does not support non-stop"));
4165 putpkt ("QNonStop:1");
4166 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4168 if (strcmp (rs
->buf
, "OK") != 0)
4169 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
4171 /* Find about threads and processes the stub is already
4172 controlling. We default to adding them in the running state.
4173 The '?' query below will then tell us about which threads are
4175 remote_update_thread_list (target
);
4177 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4179 /* Don't assume that the stub can operate in all-stop mode.
4180 Request it explicitly. */
4181 putpkt ("QNonStop:0");
4182 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4184 if (strcmp (rs
->buf
, "OK") != 0)
4185 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
4188 /* Upload TSVs regardless of whether the target is running or not. The
4189 remote stub, such as GDBserver, may have some predefined or builtin
4190 TSVs, even if the target is not running. */
4191 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4193 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4195 remote_upload_trace_state_variables (target
, &uploaded_tsvs
);
4196 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4199 /* Check whether the target is running now. */
4201 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4203 if (!target_is_non_stop_p ())
4205 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4208 error (_("The target is not running (try extended-remote?)"));
4210 /* We're connected, but not running. Drop out before we
4211 call start_remote. */
4212 rs
->starting_up
= 0;
4217 /* Save the reply for later. */
4218 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
4219 strcpy (wait_status
, rs
->buf
);
4222 /* Fetch thread list. */
4223 target_update_thread_list ();
4225 /* Let the stub know that we want it to return the thread. */
4226 set_continue_thread (minus_one_ptid
);
4228 if (thread_count () == 0)
4230 /* Target has no concept of threads at all. GDB treats
4231 non-threaded target as single-threaded; add a main
4233 add_current_inferior_and_thread (wait_status
);
4237 /* We have thread information; select the thread the target
4238 says should be current. If we're reconnecting to a
4239 multi-threaded program, this will ideally be the thread
4240 that last reported an event before GDB disconnected. */
4241 inferior_ptid
= get_current_thread (wait_status
);
4242 if (ptid_equal (inferior_ptid
, null_ptid
))
4244 /* Odd... The target was able to list threads, but not
4245 tell us which thread was current (no "thread"
4246 register in T stop reply?). Just pick the first
4247 thread in the thread list then. */
4250 fprintf_unfiltered (gdb_stdlog
,
4251 "warning: couldn't determine remote "
4252 "current thread; picking first in list.\n");
4254 inferior_ptid
= thread_list
->ptid
;
4258 /* init_wait_for_inferior should be called before get_offsets in order
4259 to manage `inserted' flag in bp loc in a correct state.
4260 breakpoint_init_inferior, called from init_wait_for_inferior, set
4261 `inserted' flag to 0, while before breakpoint_re_set, called from
4262 start_remote, set `inserted' flag to 1. In the initialization of
4263 inferior, breakpoint_init_inferior should be called first, and then
4264 breakpoint_re_set can be called. If this order is broken, state of
4265 `inserted' flag is wrong, and cause some problems on breakpoint
4267 init_wait_for_inferior ();
4269 get_offsets (); /* Get text, data & bss offsets. */
4271 /* If we could not find a description using qXfer, and we know
4272 how to do it some other way, try again. This is not
4273 supported for non-stop; it could be, but it is tricky if
4274 there are no stopped threads when we connect. */
4275 if (remote_read_description_p (target
)
4276 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4278 target_clear_description ();
4279 target_find_description ();
4282 /* Use the previously fetched status. */
4283 gdb_assert (wait_status
!= NULL
);
4284 strcpy (rs
->buf
, wait_status
);
4285 rs
->cached_wait_status
= 1;
4287 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4291 /* Clear WFI global state. Do this before finding about new
4292 threads and inferiors, and setting the current inferior.
4293 Otherwise we would clear the proceed status of the current
4294 inferior when we want its stop_soon state to be preserved
4295 (see notice_new_inferior). */
4296 init_wait_for_inferior ();
4298 /* In non-stop, we will either get an "OK", meaning that there
4299 are no stopped threads at this time; or, a regular stop
4300 reply. In the latter case, there may be more than one thread
4301 stopped --- we pull them all out using the vStopped
4303 if (strcmp (rs
->buf
, "OK") != 0)
4305 struct notif_client
*notif
= ¬if_client_stop
;
4307 /* remote_notif_get_pending_replies acks this one, and gets
4309 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4310 = remote_notif_parse (notif
, rs
->buf
);
4311 remote_notif_get_pending_events (notif
);
4314 if (thread_count () == 0)
4317 error (_("The target is not running (try extended-remote?)"));
4319 /* We're connected, but not running. Drop out before we
4320 call start_remote. */
4321 rs
->starting_up
= 0;
4325 /* In non-stop mode, any cached wait status will be stored in
4326 the stop reply queue. */
4327 gdb_assert (wait_status
== NULL
);
4329 /* Report all signals during attach/startup. */
4330 remote_pass_signals (target
, 0, NULL
);
4332 /* If there are already stopped threads, mark them stopped and
4333 report their stops before giving the prompt to the user. */
4334 process_initial_stop_replies (from_tty
);
4336 if (target_can_async_p ())
4340 /* If we connected to a live target, do some additional setup. */
4341 if (target_has_execution
)
4343 if (symfile_objfile
) /* No use without a symbol-file. */
4344 remote_check_symbols ();
4347 /* Possibly the target has been engaged in a trace run started
4348 previously; find out where things are at. */
4349 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4351 struct uploaded_tp
*uploaded_tps
= NULL
;
4353 if (current_trace_status ()->running
)
4354 printf_filtered (_("Trace is already running on the target.\n"));
4356 remote_upload_tracepoints (target
, &uploaded_tps
);
4358 merge_uploaded_tracepoints (&uploaded_tps
);
4361 /* Possibly the target has been engaged in a btrace record started
4362 previously; find out where things are at. */
4363 remote_btrace_maybe_reopen ();
4365 /* The thread and inferior lists are now synchronized with the
4366 target, our symbols have been relocated, and we're merged the
4367 target's tracepoints with ours. We're done with basic start
4369 rs
->starting_up
= 0;
4371 /* Maybe breakpoints are global and need to be inserted now. */
4372 if (breakpoints_should_be_inserted_now ())
4373 insert_breakpoints ();
4376 /* Open a connection to a remote debugger.
4377 NAME is the filename used for communication. */
4380 remote_open (const char *name
, int from_tty
)
4382 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
4385 /* Open a connection to a remote debugger using the extended
4386 remote gdb protocol. NAME is the filename used for communication. */
4389 extended_remote_open (const char *name
, int from_tty
)
4391 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
4394 /* Reset all packets back to "unknown support". Called when opening a
4395 new connection to a remote target. */
4398 reset_all_packet_configs_support (void)
4402 for (i
= 0; i
< PACKET_MAX
; i
++)
4403 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4406 /* Initialize all packet configs. */
4409 init_all_packet_configs (void)
4413 for (i
= 0; i
< PACKET_MAX
; i
++)
4415 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4416 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4420 /* Symbol look-up. */
4423 remote_check_symbols (void)
4425 struct remote_state
*rs
= get_remote_state ();
4426 char *msg
, *reply
, *tmp
;
4429 struct cleanup
*old_chain
;
4431 /* The remote side has no concept of inferiors that aren't running
4432 yet, it only knows about running processes. If we're connected
4433 but our current inferior is not running, we should not invite the
4434 remote target to request symbol lookups related to its
4435 (unrelated) current process. */
4436 if (!target_has_execution
)
4439 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4442 /* Make sure the remote is pointing at the right process. Note
4443 there's no way to select "no process". */
4444 set_general_process ();
4446 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4447 because we need both at the same time. */
4448 msg
= (char *) xmalloc (get_remote_packet_size ());
4449 old_chain
= make_cleanup (xfree
, msg
);
4450 reply
= (char *) xmalloc (get_remote_packet_size ());
4451 make_cleanup (free_current_contents
, &reply
);
4452 reply_size
= get_remote_packet_size ();
4454 /* Invite target to request symbol lookups. */
4456 putpkt ("qSymbol::");
4457 getpkt (&reply
, &reply_size
, 0);
4458 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4460 while (startswith (reply
, "qSymbol:"))
4462 struct bound_minimal_symbol sym
;
4465 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
4467 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
4468 if (sym
.minsym
== NULL
)
4469 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
4472 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4473 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4475 /* If this is a function address, return the start of code
4476 instead of any data function descriptor. */
4477 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4481 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
4482 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4486 getpkt (&reply
, &reply_size
, 0);
4489 do_cleanups (old_chain
);
4492 static struct serial
*
4493 remote_serial_open (const char *name
)
4495 static int udp_warning
= 0;
4497 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4498 of in ser-tcp.c, because it is the remote protocol assuming that the
4499 serial connection is reliable and not the serial connection promising
4501 if (!udp_warning
&& startswith (name
, "udp:"))
4503 warning (_("The remote protocol may be unreliable over UDP.\n"
4504 "Some events may be lost, rendering further debugging "
4509 return serial_open (name
);
4512 /* Inform the target of our permission settings. The permission flags
4513 work without this, but if the target knows the settings, it can do
4514 a couple things. First, it can add its own check, to catch cases
4515 that somehow manage to get by the permissions checks in target
4516 methods. Second, if the target is wired to disallow particular
4517 settings (for instance, a system in the field that is not set up to
4518 be able to stop at a breakpoint), it can object to any unavailable
4522 remote_set_permissions (struct target_ops
*self
)
4524 struct remote_state
*rs
= get_remote_state ();
4526 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAllow:"
4527 "WriteReg:%x;WriteMem:%x;"
4528 "InsertBreak:%x;InsertTrace:%x;"
4529 "InsertFastTrace:%x;Stop:%x",
4530 may_write_registers
, may_write_memory
,
4531 may_insert_breakpoints
, may_insert_tracepoints
,
4532 may_insert_fast_tracepoints
, may_stop
);
4534 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4536 /* If the target didn't like the packet, warn the user. Do not try
4537 to undo the user's settings, that would just be maddening. */
4538 if (strcmp (rs
->buf
, "OK") != 0)
4539 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
4542 /* This type describes each known response to the qSupported
4544 struct protocol_feature
4546 /* The name of this protocol feature. */
4549 /* The default for this protocol feature. */
4550 enum packet_support default_support
;
4552 /* The function to call when this feature is reported, or after
4553 qSupported processing if the feature is not supported.
4554 The first argument points to this structure. The second
4555 argument indicates whether the packet requested support be
4556 enabled, disabled, or probed (or the default, if this function
4557 is being called at the end of processing and this feature was
4558 not reported). The third argument may be NULL; if not NULL, it
4559 is a NUL-terminated string taken from the packet following
4560 this feature's name and an equals sign. */
4561 void (*func
) (const struct protocol_feature
*, enum packet_support
,
4564 /* The corresponding packet for this feature. Only used if
4565 FUNC is remote_supported_packet. */
4570 remote_supported_packet (const struct protocol_feature
*feature
,
4571 enum packet_support support
,
4572 const char *argument
)
4576 warning (_("Remote qSupported response supplied an unexpected value for"
4577 " \"%s\"."), feature
->name
);
4581 remote_protocol_packets
[feature
->packet
].support
= support
;
4585 remote_packet_size (const struct protocol_feature
*feature
,
4586 enum packet_support support
, const char *value
)
4588 struct remote_state
*rs
= get_remote_state ();
4593 if (support
!= PACKET_ENABLE
)
4596 if (value
== NULL
|| *value
== '\0')
4598 warning (_("Remote target reported \"%s\" without a size."),
4604 packet_size
= strtol (value
, &value_end
, 16);
4605 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
4607 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4608 feature
->name
, value
);
4612 /* Record the new maximum packet size. */
4613 rs
->explicit_packet_size
= packet_size
;
4616 static const struct protocol_feature remote_protocol_features
[] = {
4617 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
4618 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
4619 PACKET_qXfer_auxv
},
4620 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
4621 PACKET_qXfer_exec_file
},
4622 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
4623 PACKET_qXfer_features
},
4624 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
4625 PACKET_qXfer_libraries
},
4626 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
4627 PACKET_qXfer_libraries_svr4
},
4628 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
4629 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
4630 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
4631 PACKET_qXfer_memory_map
},
4632 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
4633 PACKET_qXfer_spu_read
},
4634 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
4635 PACKET_qXfer_spu_write
},
4636 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
4637 PACKET_qXfer_osdata
},
4638 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
4639 PACKET_qXfer_threads
},
4640 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
4641 PACKET_qXfer_traceframe_info
},
4642 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
4643 PACKET_QPassSignals
},
4644 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
4645 PACKET_QCatchSyscalls
},
4646 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
4647 PACKET_QProgramSignals
},
4648 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
4649 PACKET_QSetWorkingDir
},
4650 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
4651 PACKET_QStartupWithShell
},
4652 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
4653 PACKET_QEnvironmentHexEncoded
},
4654 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
4655 PACKET_QEnvironmentReset
},
4656 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
4657 PACKET_QEnvironmentUnset
},
4658 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
4659 PACKET_QStartNoAckMode
},
4660 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
4661 PACKET_multiprocess_feature
},
4662 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
4663 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
4664 PACKET_qXfer_siginfo_read
},
4665 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
4666 PACKET_qXfer_siginfo_write
},
4667 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4668 PACKET_ConditionalTracepoints
},
4669 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
4670 PACKET_ConditionalBreakpoints
},
4671 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
4672 PACKET_BreakpointCommands
},
4673 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4674 PACKET_FastTracepoints
},
4675 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4676 PACKET_StaticTracepoints
},
4677 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
4678 PACKET_InstallInTrace
},
4679 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
4680 PACKET_DisconnectedTracing_feature
},
4681 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
4683 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
4685 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
4686 PACKET_TracepointSource
},
4687 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
4689 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4690 PACKET_EnableDisableTracepoints_feature
},
4691 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
4692 PACKET_qXfer_fdpic
},
4693 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
4695 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
4696 PACKET_QDisableRandomization
},
4697 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
4698 { "QTBuffer:size", PACKET_DISABLE
,
4699 remote_supported_packet
, PACKET_QTBuffer_size
},
4700 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
4701 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
4702 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
4703 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
4704 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
4705 PACKET_qXfer_btrace
},
4706 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
4707 PACKET_qXfer_btrace_conf
},
4708 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
4709 PACKET_Qbtrace_conf_bts_size
},
4710 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
4711 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
4712 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
4713 PACKET_fork_event_feature
},
4714 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
4715 PACKET_vfork_event_feature
},
4716 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
4717 PACKET_exec_event_feature
},
4718 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
4719 PACKET_Qbtrace_conf_pt_size
},
4720 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
4721 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
4722 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
4725 static char *remote_support_xml
;
4727 /* Register string appended to "xmlRegisters=" in qSupported query. */
4730 register_remote_support_xml (const char *xml
)
4732 #if defined(HAVE_LIBEXPAT)
4733 if (remote_support_xml
== NULL
)
4734 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
4737 char *copy
= xstrdup (remote_support_xml
+ 13);
4738 char *p
= strtok (copy
, ",");
4742 if (strcmp (p
, xml
) == 0)
4749 while ((p
= strtok (NULL
, ",")) != NULL
);
4752 remote_support_xml
= reconcat (remote_support_xml
,
4753 remote_support_xml
, ",", xml
,
4760 remote_query_supported_append (char *msg
, const char *append
)
4763 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
4765 return xstrdup (append
);
4769 remote_query_supported (void)
4771 struct remote_state
*rs
= get_remote_state ();
4774 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
4776 /* The packet support flags are handled differently for this packet
4777 than for most others. We treat an error, a disabled packet, and
4778 an empty response identically: any features which must be reported
4779 to be used will be automatically disabled. An empty buffer
4780 accomplishes this, since that is also the representation for a list
4781 containing no features. */
4784 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
4787 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
4789 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
4790 q
= remote_query_supported_append (q
, "multiprocess+");
4792 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4793 q
= remote_query_supported_append (q
, "swbreak+");
4794 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4795 q
= remote_query_supported_append (q
, "hwbreak+");
4797 q
= remote_query_supported_append (q
, "qRelocInsn+");
4799 if (packet_set_cmd_state (PACKET_fork_event_feature
)
4800 != AUTO_BOOLEAN_FALSE
)
4801 q
= remote_query_supported_append (q
, "fork-events+");
4802 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
4803 != AUTO_BOOLEAN_FALSE
)
4804 q
= remote_query_supported_append (q
, "vfork-events+");
4805 if (packet_set_cmd_state (PACKET_exec_event_feature
)
4806 != AUTO_BOOLEAN_FALSE
)
4807 q
= remote_query_supported_append (q
, "exec-events+");
4809 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
4810 q
= remote_query_supported_append (q
, "vContSupported+");
4812 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
4813 q
= remote_query_supported_append (q
, "QThreadEvents+");
4815 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
4816 q
= remote_query_supported_append (q
, "no-resumed+");
4818 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4819 the qSupported:xmlRegisters=i386 handling. */
4820 if (remote_support_xml
!= NULL
)
4821 q
= remote_query_supported_append (q
, remote_support_xml
);
4823 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
4826 do_cleanups (old_chain
);
4828 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4830 /* If an error occured, warn, but do not return - just reset the
4831 buffer to empty and go on to disable features. */
4832 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
4835 warning (_("Remote failure reply: %s"), rs
->buf
);
4840 memset (seen
, 0, sizeof (seen
));
4845 enum packet_support is_supported
;
4846 char *p
, *end
, *name_end
, *value
;
4848 /* First separate out this item from the rest of the packet. If
4849 there's another item after this, we overwrite the separator
4850 (terminated strings are much easier to work with). */
4852 end
= strchr (p
, ';');
4855 end
= p
+ strlen (p
);
4865 warning (_("empty item in \"qSupported\" response"));
4870 name_end
= strchr (p
, '=');
4873 /* This is a name=value entry. */
4874 is_supported
= PACKET_ENABLE
;
4875 value
= name_end
+ 1;
4884 is_supported
= PACKET_ENABLE
;
4888 is_supported
= PACKET_DISABLE
;
4892 is_supported
= PACKET_SUPPORT_UNKNOWN
;
4896 warning (_("unrecognized item \"%s\" "
4897 "in \"qSupported\" response"), p
);
4903 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4904 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
4906 const struct protocol_feature
*feature
;
4909 feature
= &remote_protocol_features
[i
];
4910 feature
->func (feature
, is_supported
, value
);
4915 /* If we increased the packet size, make sure to increase the global
4916 buffer size also. We delay this until after parsing the entire
4917 qSupported packet, because this is the same buffer we were
4919 if (rs
->buf_size
< rs
->explicit_packet_size
)
4921 rs
->buf_size
= rs
->explicit_packet_size
;
4922 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
4925 /* Handle the defaults for unmentioned features. */
4926 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4929 const struct protocol_feature
*feature
;
4931 feature
= &remote_protocol_features
[i
];
4932 feature
->func (feature
, feature
->default_support
, NULL
);
4936 /* Serial QUIT handler for the remote serial descriptor.
4938 Defers handling a Ctrl-C until we're done with the current
4939 command/response packet sequence, unless:
4941 - We're setting up the connection. Don't send a remote interrupt
4942 request, as we're not fully synced yet. Quit immediately
4945 - The target has been resumed in the foreground
4946 (target_terminal::is_ours is false) with a synchronous resume
4947 packet, and we're blocked waiting for the stop reply, thus a
4948 Ctrl-C should be immediately sent to the target.
4950 - We get a second Ctrl-C while still within the same serial read or
4951 write. In that case the serial is seemingly wedged --- offer to
4954 - We see a second Ctrl-C without target response, after having
4955 previously interrupted the target. In that case the target/stub
4956 is probably wedged --- offer to quit/disconnect.
4960 remote_serial_quit_handler (void)
4962 struct remote_state
*rs
= get_remote_state ();
4964 if (check_quit_flag ())
4966 /* If we're starting up, we're not fully synced yet. Quit
4968 if (rs
->starting_up
)
4970 else if (rs
->got_ctrlc_during_io
)
4972 if (query (_("The target is not responding to GDB commands.\n"
4973 "Stop debugging it? ")))
4974 remote_unpush_and_throw ();
4976 /* If ^C has already been sent once, offer to disconnect. */
4977 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
4979 /* All-stop protocol, and blocked waiting for stop reply. Send
4980 an interrupt request. */
4981 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
4982 target_interrupt (inferior_ptid
);
4984 rs
->got_ctrlc_during_io
= 1;
4988 /* Remove any of the remote.c targets from target stack. Upper targets depend
4989 on it so remove them first. */
4992 remote_unpush_target (void)
4994 pop_all_targets_at_and_above (process_stratum
);
4998 remote_unpush_and_throw (void)
5000 remote_unpush_target ();
5001 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5005 remote_open_1 (const char *name
, int from_tty
,
5006 struct target_ops
*target
, int extended_p
)
5008 struct remote_state
*rs
= get_remote_state ();
5011 error (_("To open a remote debug connection, you need to specify what\n"
5012 "serial device is attached to the remote system\n"
5013 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5015 /* See FIXME above. */
5016 if (!target_async_permitted
)
5017 wait_forever_enabled_p
= 1;
5019 /* If we're connected to a running target, target_preopen will kill it.
5020 Ask this question first, before target_preopen has a chance to kill
5022 if (rs
->remote_desc
!= NULL
&& !have_inferiors ())
5025 && !query (_("Already connected to a remote target. Disconnect? ")))
5026 error (_("Still connected."));
5029 /* Here the possibly existing remote target gets unpushed. */
5030 target_preopen (from_tty
);
5032 /* Make sure we send the passed signals list the next time we resume. */
5033 xfree (rs
->last_pass_packet
);
5034 rs
->last_pass_packet
= NULL
;
5036 /* Make sure we send the program signals list the next time we
5038 xfree (rs
->last_program_signals_packet
);
5039 rs
->last_program_signals_packet
= NULL
;
5041 remote_fileio_reset ();
5042 reopen_exec_file ();
5045 rs
->remote_desc
= remote_serial_open (name
);
5046 if (!rs
->remote_desc
)
5047 perror_with_name (name
);
5049 if (baud_rate
!= -1)
5051 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5053 /* The requested speed could not be set. Error out to
5054 top level after closing remote_desc. Take care to
5055 set remote_desc to NULL to avoid closing remote_desc
5057 serial_close (rs
->remote_desc
);
5058 rs
->remote_desc
= NULL
;
5059 perror_with_name (name
);
5063 serial_setparity (rs
->remote_desc
, serial_parity
);
5064 serial_raw (rs
->remote_desc
);
5066 /* If there is something sitting in the buffer we might take it as a
5067 response to a command, which would be bad. */
5068 serial_flush_input (rs
->remote_desc
);
5072 puts_filtered ("Remote debugging using ");
5073 puts_filtered (name
);
5074 puts_filtered ("\n");
5076 push_target (target
); /* Switch to using remote target now. */
5078 /* Register extra event sources in the event loop. */
5079 remote_async_inferior_event_token
5080 = create_async_event_handler (remote_async_inferior_event_handler
,
5082 rs
->notif_state
= remote_notif_state_allocate ();
5084 /* Reset the target state; these things will be queried either by
5085 remote_query_supported or as they are needed. */
5086 reset_all_packet_configs_support ();
5087 rs
->cached_wait_status
= 0;
5088 rs
->explicit_packet_size
= 0;
5090 rs
->extended
= extended_p
;
5091 rs
->waiting_for_stop_reply
= 0;
5092 rs
->ctrlc_pending_p
= 0;
5093 rs
->got_ctrlc_during_io
= 0;
5095 rs
->general_thread
= not_sent_ptid
;
5096 rs
->continue_thread
= not_sent_ptid
;
5097 rs
->remote_traceframe_number
= -1;
5099 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5101 /* Probe for ability to use "ThreadInfo" query, as required. */
5102 rs
->use_threadinfo_query
= 1;
5103 rs
->use_threadextra_query
= 1;
5105 readahead_cache_invalidate ();
5107 if (target_async_permitted
)
5109 /* FIXME: cagney/1999-09-23: During the initial connection it is
5110 assumed that the target is already ready and able to respond to
5111 requests. Unfortunately remote_start_remote() eventually calls
5112 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5113 around this. Eventually a mechanism that allows
5114 wait_for_inferior() to expect/get timeouts will be
5116 wait_forever_enabled_p
= 0;
5119 /* First delete any symbols previously loaded from shared libraries. */
5120 no_shared_libraries (NULL
, 0);
5123 init_thread_list ();
5125 /* Start the remote connection. If error() or QUIT, discard this
5126 target (we'd otherwise be in an inconsistent state) and then
5127 propogate the error on up the exception chain. This ensures that
5128 the caller doesn't stumble along blindly assuming that the
5129 function succeeded. The CLI doesn't have this problem but other
5130 UI's, such as MI do.
5132 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5133 this function should return an error indication letting the
5134 caller restore the previous state. Unfortunately the command
5135 ``target remote'' is directly wired to this function making that
5136 impossible. On a positive note, the CLI side of this problem has
5137 been fixed - the function set_cmd_context() makes it possible for
5138 all the ``target ....'' commands to share a common callback
5139 function. See cli-dump.c. */
5144 remote_start_remote (from_tty
, target
, extended_p
);
5146 CATCH (ex
, RETURN_MASK_ALL
)
5148 /* Pop the partially set up target - unless something else did
5149 already before throwing the exception. */
5150 if (rs
->remote_desc
!= NULL
)
5151 remote_unpush_target ();
5152 if (target_async_permitted
)
5153 wait_forever_enabled_p
= 1;
5154 throw_exception (ex
);
5159 remote_btrace_reset ();
5161 if (target_async_permitted
)
5162 wait_forever_enabled_p
= 1;
5165 /* Detach the specified process. */
5168 remote_detach_pid (int pid
)
5170 struct remote_state
*rs
= get_remote_state ();
5172 if (remote_multi_process_p (rs
))
5173 xsnprintf (rs
->buf
, get_remote_packet_size (), "D;%x", pid
);
5175 strcpy (rs
->buf
, "D");
5178 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5180 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5182 else if (rs
->buf
[0] == '\0')
5183 error (_("Remote doesn't know how to detach"));
5185 error (_("Can't detach process."));
5188 /* This detaches a program to which we previously attached, using
5189 inferior_ptid to identify the process. After this is done, GDB
5190 can be used to debug some other program. We better not have left
5191 any breakpoints in the target program or it'll die when it hits
5195 remote_detach_1 (const char *args
, int from_tty
)
5197 int pid
= ptid_get_pid (inferior_ptid
);
5198 struct remote_state
*rs
= get_remote_state ();
5199 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
5203 error (_("Argument given to \"detach\" when remotely debugging."));
5205 if (!target_has_execution
)
5206 error (_("No process to detach from."));
5208 target_announce_detach (from_tty
);
5210 /* Tell the remote target to detach. */
5211 remote_detach_pid (pid
);
5213 /* Exit only if this is the only active inferior. */
5214 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors () == 1)
5215 puts_filtered (_("Ending remote debugging.\n"));
5217 /* Check to see if we are detaching a fork parent. Note that if we
5218 are detaching a fork child, tp == NULL. */
5219 is_fork_parent
= (tp
!= NULL
5220 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5222 /* If doing detach-on-fork, we don't mourn, because that will delete
5223 breakpoints that should be available for the followed inferior. */
5224 if (!is_fork_parent
)
5225 target_mourn_inferior (inferior_ptid
);
5228 inferior_ptid
= null_ptid
;
5229 detach_inferior (pid
);
5234 remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5236 remote_detach_1 (args
, from_tty
);
5240 extended_remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5242 remote_detach_1 (args
, from_tty
);
5245 /* Target follow-fork function for remote targets. On entry, and
5246 at return, the current inferior is the fork parent.
5248 Note that although this is currently only used for extended-remote,
5249 it is named remote_follow_fork in anticipation of using it for the
5250 remote target as well. */
5253 remote_follow_fork (struct target_ops
*ops
, int follow_child
,
5256 struct remote_state
*rs
= get_remote_state ();
5257 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5259 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5260 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5262 /* When following the parent and detaching the child, we detach
5263 the child here. For the case of following the child and
5264 detaching the parent, the detach is done in the target-
5265 independent follow fork code in infrun.c. We can't use
5266 target_detach when detaching an unfollowed child because
5267 the client side doesn't know anything about the child. */
5268 if (detach_fork
&& !follow_child
)
5270 /* Detach the fork child. */
5274 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5275 child_pid
= ptid_get_pid (child_ptid
);
5277 remote_detach_pid (child_pid
);
5278 detach_inferior (child_pid
);
5284 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5285 in the program space of the new inferior. On entry and at return the
5286 current inferior is the exec'ing inferior. INF is the new exec'd
5287 inferior, which may be the same as the exec'ing inferior unless
5288 follow-exec-mode is "new". */
5291 remote_follow_exec (struct target_ops
*ops
,
5292 struct inferior
*inf
, char *execd_pathname
)
5294 /* We know that this is a target file name, so if it has the "target:"
5295 prefix we strip it off before saving it in the program space. */
5296 if (is_target_filename (execd_pathname
))
5297 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5299 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5302 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5305 remote_disconnect (struct target_ops
*target
, const char *args
, int from_tty
)
5308 error (_("Argument given to \"disconnect\" when remotely debugging."));
5310 /* Make sure we unpush even the extended remote targets. Calling
5311 target_mourn_inferior won't unpush, and remote_mourn won't
5312 unpush if there is more than one inferior left. */
5313 unpush_target (target
);
5314 generic_mourn_inferior ();
5317 puts_filtered ("Ending remote debugging.\n");
5320 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5321 be chatty about it. */
5324 extended_remote_attach (struct target_ops
*target
, const char *args
,
5327 struct remote_state
*rs
= get_remote_state ();
5329 char *wait_status
= NULL
;
5331 pid
= parse_pid_to_attach (args
);
5333 /* Remote PID can be freely equal to getpid, do not check it here the same
5334 way as in other targets. */
5336 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5337 error (_("This target does not support attaching to a process"));
5341 char *exec_file
= get_exec_file (0);
5344 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5345 target_pid_to_str (pid_to_ptid (pid
)));
5347 printf_unfiltered (_("Attaching to %s\n"),
5348 target_pid_to_str (pid_to_ptid (pid
)));
5350 gdb_flush (gdb_stdout
);
5353 xsnprintf (rs
->buf
, get_remote_packet_size (), "vAttach;%x", pid
);
5355 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5357 switch (packet_ok (rs
->buf
,
5358 &remote_protocol_packets
[PACKET_vAttach
]))
5361 if (!target_is_non_stop_p ())
5363 /* Save the reply for later. */
5364 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
5365 strcpy (wait_status
, rs
->buf
);
5367 else if (strcmp (rs
->buf
, "OK") != 0)
5368 error (_("Attaching to %s failed with: %s"),
5369 target_pid_to_str (pid_to_ptid (pid
)),
5372 case PACKET_UNKNOWN
:
5373 error (_("This target does not support attaching to a process"));
5375 error (_("Attaching to %s failed"),
5376 target_pid_to_str (pid_to_ptid (pid
)));
5379 set_current_inferior (remote_add_inferior (0, pid
, 1, 0));
5381 inferior_ptid
= pid_to_ptid (pid
);
5383 if (target_is_non_stop_p ())
5385 struct thread_info
*thread
;
5387 /* Get list of threads. */
5388 remote_update_thread_list (target
);
5390 thread
= first_thread_of_process (pid
);
5392 inferior_ptid
= thread
->ptid
;
5394 inferior_ptid
= pid_to_ptid (pid
);
5396 /* Invalidate our notion of the remote current thread. */
5397 record_currthread (rs
, minus_one_ptid
);
5401 /* Now, if we have thread information, update inferior_ptid. */
5402 inferior_ptid
= remote_current_thread (inferior_ptid
);
5404 /* Add the main thread to the thread list. */
5405 add_thread_silent (inferior_ptid
);
5408 /* Next, if the target can specify a description, read it. We do
5409 this before anything involving memory or registers. */
5410 target_find_description ();
5412 if (!target_is_non_stop_p ())
5414 /* Use the previously fetched status. */
5415 gdb_assert (wait_status
!= NULL
);
5417 if (target_can_async_p ())
5419 struct notif_event
*reply
5420 = remote_notif_parse (¬if_client_stop
, wait_status
);
5422 push_stop_reply ((struct stop_reply
*) reply
);
5428 gdb_assert (wait_status
!= NULL
);
5429 strcpy (rs
->buf
, wait_status
);
5430 rs
->cached_wait_status
= 1;
5434 gdb_assert (wait_status
== NULL
);
5437 /* Implementation of the to_post_attach method. */
5440 extended_remote_post_attach (struct target_ops
*ops
, int pid
)
5442 /* Get text, data & bss offsets. */
5445 /* In certain cases GDB might not have had the chance to start
5446 symbol lookup up until now. This could happen if the debugged
5447 binary is not using shared libraries, the vsyscall page is not
5448 present (on Linux) and the binary itself hadn't changed since the
5449 debugging process was started. */
5450 if (symfile_objfile
!= NULL
)
5451 remote_check_symbols();
5455 /* Check for the availability of vCont. This function should also check
5459 remote_vcont_probe (struct remote_state
*rs
)
5463 strcpy (rs
->buf
, "vCont?");
5465 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5468 /* Make sure that the features we assume are supported. */
5469 if (startswith (buf
, "vCont"))
5472 int support_c
, support_C
;
5474 rs
->supports_vCont
.s
= 0;
5475 rs
->supports_vCont
.S
= 0;
5478 rs
->supports_vCont
.t
= 0;
5479 rs
->supports_vCont
.r
= 0;
5480 while (p
&& *p
== ';')
5483 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5484 rs
->supports_vCont
.s
= 1;
5485 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5486 rs
->supports_vCont
.S
= 1;
5487 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5489 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5491 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5492 rs
->supports_vCont
.t
= 1;
5493 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5494 rs
->supports_vCont
.r
= 1;
5496 p
= strchr (p
, ';');
5499 /* If c, and C are not all supported, we can't use vCont. Clearing
5500 BUF will make packet_ok disable the packet. */
5501 if (!support_c
|| !support_C
)
5505 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
5508 /* Helper function for building "vCont" resumptions. Write a
5509 resumption to P. ENDP points to one-passed-the-end of the buffer
5510 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5511 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5512 resumed thread should be single-stepped and/or signalled. If PTID
5513 equals minus_one_ptid, then all threads are resumed; if PTID
5514 represents a process, then all threads of the process are resumed;
5515 the thread to be stepped and/or signalled is given in the global
5519 append_resumption (char *p
, char *endp
,
5520 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5522 struct remote_state
*rs
= get_remote_state ();
5524 if (step
&& siggnal
!= GDB_SIGNAL_0
)
5525 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
5527 /* GDB is willing to range step. */
5528 && use_range_stepping
5529 /* Target supports range stepping. */
5530 && rs
->supports_vCont
.r
5531 /* We don't currently support range stepping multiple
5532 threads with a wildcard (though the protocol allows it,
5533 so stubs shouldn't make an active effort to forbid
5535 && !(remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5537 struct thread_info
*tp
;
5539 if (ptid_equal (ptid
, minus_one_ptid
))
5541 /* If we don't know about the target thread's tid, then
5542 we're resuming magic_null_ptid (see caller). */
5543 tp
= find_thread_ptid (magic_null_ptid
);
5546 tp
= find_thread_ptid (ptid
);
5547 gdb_assert (tp
!= NULL
);
5549 if (tp
->control
.may_range_step
)
5551 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5553 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
5554 phex_nz (tp
->control
.step_range_start
,
5556 phex_nz (tp
->control
.step_range_end
,
5560 p
+= xsnprintf (p
, endp
- p
, ";s");
5563 p
+= xsnprintf (p
, endp
- p
, ";s");
5564 else if (siggnal
!= GDB_SIGNAL_0
)
5565 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
5567 p
+= xsnprintf (p
, endp
- p
, ";c");
5569 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
5573 /* All (-1) threads of process. */
5574 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5576 p
+= xsnprintf (p
, endp
- p
, ":");
5577 p
= write_ptid (p
, endp
, nptid
);
5579 else if (!ptid_equal (ptid
, minus_one_ptid
))
5581 p
+= xsnprintf (p
, endp
- p
, ":");
5582 p
= write_ptid (p
, endp
, ptid
);
5588 /* Clear the thread's private info on resume. */
5591 resume_clear_thread_private_info (struct thread_info
*thread
)
5593 if (thread
->priv
!= NULL
)
5595 thread
->priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
5596 thread
->priv
->watch_data_address
= 0;
5600 /* Append a vCont continue-with-signal action for threads that have a
5601 non-zero stop signal. */
5604 append_pending_thread_resumptions (char *p
, char *endp
, ptid_t ptid
)
5606 struct thread_info
*thread
;
5608 ALL_NON_EXITED_THREADS (thread
)
5609 if (ptid_match (thread
->ptid
, ptid
)
5610 && !ptid_equal (inferior_ptid
, thread
->ptid
)
5611 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
5613 p
= append_resumption (p
, endp
, thread
->ptid
,
5614 0, thread
->suspend
.stop_signal
);
5615 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
5616 resume_clear_thread_private_info (thread
);
5622 /* Set the target running, using the packets that use Hc
5626 remote_resume_with_hc (struct target_ops
*ops
,
5627 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5629 struct remote_state
*rs
= get_remote_state ();
5630 struct thread_info
*thread
;
5633 rs
->last_sent_signal
= siggnal
;
5634 rs
->last_sent_step
= step
;
5636 /* The c/s/C/S resume packets use Hc, so set the continue
5638 if (ptid_equal (ptid
, minus_one_ptid
))
5639 set_continue_thread (any_thread_ptid
);
5641 set_continue_thread (ptid
);
5643 ALL_NON_EXITED_THREADS (thread
)
5644 resume_clear_thread_private_info (thread
);
5647 if (execution_direction
== EXEC_REVERSE
)
5649 /* We don't pass signals to the target in reverse exec mode. */
5650 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
5651 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5654 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
5655 error (_("Remote reverse-step not supported."));
5656 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
5657 error (_("Remote reverse-continue not supported."));
5659 strcpy (buf
, step
? "bs" : "bc");
5661 else if (siggnal
!= GDB_SIGNAL_0
)
5663 buf
[0] = step
? 'S' : 'C';
5664 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
5665 buf
[2] = tohex (((int) siggnal
) & 0xf);
5669 strcpy (buf
, step
? "s" : "c");
5674 /* Resume the remote inferior by using a "vCont" packet. The thread
5675 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5676 resumed thread should be single-stepped and/or signalled. If PTID
5677 equals minus_one_ptid, then all threads are resumed; the thread to
5678 be stepped and/or signalled is given in the global INFERIOR_PTID.
5679 This function returns non-zero iff it resumes the inferior.
5681 This function issues a strict subset of all possible vCont commands
5685 remote_resume_with_vcont (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5687 struct remote_state
*rs
= get_remote_state ();
5691 /* No reverse execution actions defined for vCont. */
5692 if (execution_direction
== EXEC_REVERSE
)
5695 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5696 remote_vcont_probe (rs
);
5698 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
5702 endp
= rs
->buf
+ get_remote_packet_size ();
5704 /* If we could generate a wider range of packets, we'd have to worry
5705 about overflowing BUF. Should there be a generic
5706 "multi-part-packet" packet? */
5708 p
+= xsnprintf (p
, endp
- p
, "vCont");
5710 if (ptid_equal (ptid
, magic_null_ptid
))
5712 /* MAGIC_NULL_PTID means that we don't have any active threads,
5713 so we don't have any TID numbers the inferior will
5714 understand. Make sure to only send forms that do not specify
5716 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
5718 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
5720 /* Resume all threads (of all processes, or of a single
5721 process), with preference for INFERIOR_PTID. This assumes
5722 inferior_ptid belongs to the set of all threads we are about
5724 if (step
|| siggnal
!= GDB_SIGNAL_0
)
5726 /* Step inferior_ptid, with or without signal. */
5727 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
5730 /* Also pass down any pending signaled resumption for other
5731 threads not the current. */
5732 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
5734 /* And continue others without a signal. */
5735 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
5739 /* Scheduler locking; resume only PTID. */
5740 append_resumption (p
, endp
, ptid
, step
, siggnal
);
5743 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
5746 if (target_is_non_stop_p ())
5748 /* In non-stop, the stub replies to vCont with "OK". The stop
5749 reply will be reported asynchronously by means of a `%Stop'
5751 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5752 if (strcmp (rs
->buf
, "OK") != 0)
5753 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5759 /* Tell the remote machine to resume. */
5762 remote_resume (struct target_ops
*ops
,
5763 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5765 struct remote_state
*rs
= get_remote_state ();
5767 /* When connected in non-stop mode, the core resumes threads
5768 individually. Resuming remote threads directly in target_resume
5769 would thus result in sending one packet per thread. Instead, to
5770 minimize roundtrip latency, here we just store the resume
5771 request; the actual remote resumption will be done in
5772 target_commit_resume / remote_commit_resume, where we'll be able
5773 to do vCont action coalescing. */
5774 if (target_is_non_stop_p () && execution_direction
!= EXEC_REVERSE
)
5776 struct private_thread_info
*remote_thr
;
5778 if (ptid_equal (minus_one_ptid
, ptid
) || ptid_is_pid (ptid
))
5779 remote_thr
= get_private_info_ptid (inferior_ptid
);
5781 remote_thr
= get_private_info_ptid (ptid
);
5782 remote_thr
->last_resume_step
= step
;
5783 remote_thr
->last_resume_sig
= siggnal
;
5787 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5788 (explained in remote-notif.c:handle_notification) so
5789 remote_notif_process is not called. We need find a place where
5790 it is safe to start a 'vNotif' sequence. It is good to do it
5791 before resuming inferior, because inferior was stopped and no RSP
5792 traffic at that moment. */
5793 if (!target_is_non_stop_p ())
5794 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
5796 rs
->last_resume_exec_dir
= execution_direction
;
5798 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
5799 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
5800 remote_resume_with_hc (ops
, ptid
, step
, siggnal
);
5802 /* We are about to start executing the inferior, let's register it
5803 with the event loop. NOTE: this is the one place where all the
5804 execution commands end up. We could alternatively do this in each
5805 of the execution commands in infcmd.c. */
5806 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5807 into infcmd.c in order to allow inferior function calls to work
5808 NOT asynchronously. */
5809 if (target_can_async_p ())
5812 /* We've just told the target to resume. The remote server will
5813 wait for the inferior to stop, and then send a stop reply. In
5814 the mean time, we can't start another command/query ourselves
5815 because the stub wouldn't be ready to process it. This applies
5816 only to the base all-stop protocol, however. In non-stop (which
5817 only supports vCont), the stub replies with an "OK", and is
5818 immediate able to process further serial input. */
5819 if (!target_is_non_stop_p ())
5820 rs
->waiting_for_stop_reply
= 1;
5823 static void check_pending_events_prevent_wildcard_vcont
5824 (int *may_global_wildcard_vcont
);
5825 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
5827 /* Private per-inferior info for target remote processes. */
5829 struct remote_inferior
: public private_inferior
5831 /* Whether we can send a wildcard vCont for this process. */
5832 bool may_wildcard_vcont
= true;
5835 /* Get the remote private inferior data associated to INF. */
5837 static remote_inferior
*
5838 get_remote_inferior (inferior
*inf
)
5840 if (inf
->priv
== NULL
)
5841 inf
->priv
.reset (new remote_inferior
);
5843 return static_cast<remote_inferior
*> (inf
->priv
.get ());
5846 /* Structure used to track the construction of a vCont packet in the
5847 outgoing packet buffer. This is used to send multiple vCont
5848 packets if we have more actions than would fit a single packet. */
5850 struct vcont_builder
5852 /* Pointer to the first action. P points here if no action has been
5856 /* Where the next action will be appended. */
5859 /* The end of the buffer. Must never write past this. */
5863 /* Prepare the outgoing buffer for a new vCont packet. */
5866 vcont_builder_restart (struct vcont_builder
*builder
)
5868 struct remote_state
*rs
= get_remote_state ();
5870 builder
->p
= rs
->buf
;
5871 builder
->endp
= rs
->buf
+ get_remote_packet_size ();
5872 builder
->p
+= xsnprintf (builder
->p
, builder
->endp
- builder
->p
, "vCont");
5873 builder
->first_action
= builder
->p
;
5876 /* If the vCont packet being built has any action, send it to the
5880 vcont_builder_flush (struct vcont_builder
*builder
)
5882 struct remote_state
*rs
;
5884 if (builder
->p
== builder
->first_action
)
5887 rs
= get_remote_state ();
5889 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5890 if (strcmp (rs
->buf
, "OK") != 0)
5891 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5894 /* The largest action is range-stepping, with its two addresses. This
5895 is more than sufficient. If a new, bigger action is created, it'll
5896 quickly trigger a failed assertion in append_resumption (and we'll
5898 #define MAX_ACTION_SIZE 200
5900 /* Append a new vCont action in the outgoing packet being built. If
5901 the action doesn't fit the packet along with previous actions, push
5902 what we've got so far to the remote end and start over a new vCont
5903 packet (with the new action). */
5906 vcont_builder_push_action (struct vcont_builder
*builder
,
5907 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5909 char buf
[MAX_ACTION_SIZE
+ 1];
5913 endp
= append_resumption (buf
, buf
+ sizeof (buf
),
5914 ptid
, step
, siggnal
);
5916 /* Check whether this new action would fit in the vCont packet along
5917 with previous actions. If not, send what we've got so far and
5918 start a new vCont packet. */
5920 if (rsize
> builder
->endp
- builder
->p
)
5922 vcont_builder_flush (builder
);
5923 vcont_builder_restart (builder
);
5925 /* Should now fit. */
5926 gdb_assert (rsize
<= builder
->endp
- builder
->p
);
5929 memcpy (builder
->p
, buf
, rsize
);
5930 builder
->p
+= rsize
;
5934 /* to_commit_resume implementation. */
5937 remote_commit_resume (struct target_ops
*ops
)
5939 struct remote_state
*rs
= get_remote_state ();
5940 struct inferior
*inf
;
5941 struct thread_info
*tp
;
5942 int any_process_wildcard
;
5943 int may_global_wildcard_vcont
;
5944 struct vcont_builder vcont_builder
;
5946 /* If connected in all-stop mode, we'd send the remote resume
5947 request directly from remote_resume. Likewise if
5948 reverse-debugging, as there are no defined vCont actions for
5949 reverse execution. */
5950 if (!target_is_non_stop_p () || execution_direction
== EXEC_REVERSE
)
5953 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
5954 instead of resuming all threads of each process individually.
5955 However, if any thread of a process must remain halted, we can't
5956 send wildcard resumes and must send one action per thread.
5958 Care must be taken to not resume threads/processes the server
5959 side already told us are stopped, but the core doesn't know about
5960 yet, because the events are still in the vStopped notification
5963 #1 => vCont s:p1.1;c
5965 #3 <= %Stopped T05 p1.1
5970 #8 (infrun handles the stop for p1.1 and continues stepping)
5971 #9 => vCont s:p1.1;c
5973 The last vCont above would resume thread p1.2 by mistake, because
5974 the server has no idea that the event for p1.2 had not been
5977 The server side must similarly ignore resume actions for the
5978 thread that has a pending %Stopped notification (and any other
5979 threads with events pending), until GDB acks the notification
5980 with vStopped. Otherwise, e.g., the following case is
5983 #1 => g (or any other packet)
5985 #3 <= %Stopped T05 p1.2
5986 #4 => vCont s:p1.1;c
5989 Above, the server must not resume thread p1.2. GDB can't know
5990 that p1.2 stopped until it acks the %Stopped notification, and
5991 since from GDB's perspective all threads should be running, it
5994 Finally, special care must also be given to handling fork/vfork
5995 events. A (v)fork event actually tells us that two processes
5996 stopped -- the parent and the child. Until we follow the fork,
5997 we must not resume the child. Therefore, if we have a pending
5998 fork follow, we must not send a global wildcard resume action
5999 (vCont;c). We can still send process-wide wildcards though. */
6001 /* Start by assuming a global wildcard (vCont;c) is possible. */
6002 may_global_wildcard_vcont
= 1;
6004 /* And assume every process is individually wildcard-able too. */
6005 ALL_NON_EXITED_INFERIORS (inf
)
6007 remote_inferior
*priv
= get_remote_inferior (inf
);
6009 priv
->may_wildcard_vcont
= true;
6012 /* Check for any pending events (not reported or processed yet) and
6013 disable process and global wildcard resumes appropriately. */
6014 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6016 ALL_NON_EXITED_THREADS (tp
)
6018 /* If a thread of a process is not meant to be resumed, then we
6019 can't wildcard that process. */
6022 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6024 /* And if we can't wildcard a process, we can't wildcard
6025 everything either. */
6026 may_global_wildcard_vcont
= 0;
6030 /* If a thread is the parent of an unfollowed fork, then we
6031 can't do a global wildcard, as that would resume the fork
6033 if (is_pending_fork_parent_thread (tp
))
6034 may_global_wildcard_vcont
= 0;
6037 /* Now let's build the vCont packet(s). Actions must be appended
6038 from narrower to wider scopes (thread -> process -> global). If
6039 we end up with too many actions for a single packet vcont_builder
6040 flushes the current vCont packet to the remote side and starts a
6042 vcont_builder_restart (&vcont_builder
);
6044 /* Threads first. */
6045 ALL_NON_EXITED_THREADS (tp
)
6047 struct private_thread_info
*remote_thr
= tp
->priv
;
6049 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
6052 gdb_assert (!thread_is_in_step_over_chain (tp
));
6054 if (!remote_thr
->last_resume_step
6055 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
6056 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6058 /* We'll send a wildcard resume instead. */
6059 remote_thr
->vcont_resumed
= 1;
6063 vcont_builder_push_action (&vcont_builder
, tp
->ptid
,
6064 remote_thr
->last_resume_step
,
6065 remote_thr
->last_resume_sig
);
6066 remote_thr
->vcont_resumed
= 1;
6069 /* Now check whether we can send any process-wide wildcard. This is
6070 to avoid sending a global wildcard in the case nothing is
6071 supposed to be resumed. */
6072 any_process_wildcard
= 0;
6074 ALL_NON_EXITED_INFERIORS (inf
)
6076 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6078 any_process_wildcard
= 1;
6083 if (any_process_wildcard
)
6085 /* If all processes are wildcard-able, then send a single "c"
6086 action, otherwise, send an "all (-1) threads of process"
6087 continue action for each running process, if any. */
6088 if (may_global_wildcard_vcont
)
6090 vcont_builder_push_action (&vcont_builder
, minus_one_ptid
,
6095 ALL_NON_EXITED_INFERIORS (inf
)
6097 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6099 vcont_builder_push_action (&vcont_builder
,
6100 pid_to_ptid (inf
->pid
),
6107 vcont_builder_flush (&vcont_builder
);
6112 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6113 thread, all threads of a remote process, or all threads of all
6117 remote_stop_ns (ptid_t ptid
)
6119 struct remote_state
*rs
= get_remote_state ();
6121 char *endp
= rs
->buf
+ get_remote_packet_size ();
6123 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6124 remote_vcont_probe (rs
);
6126 if (!rs
->supports_vCont
.t
)
6127 error (_("Remote server does not support stopping threads"));
6129 if (ptid_equal (ptid
, minus_one_ptid
)
6130 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
6131 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6136 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6138 if (ptid_is_pid (ptid
))
6139 /* All (-1) threads of process. */
6140 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
6143 /* Small optimization: if we already have a stop reply for
6144 this thread, no use in telling the stub we want this
6146 if (peek_stop_reply (ptid
))
6152 write_ptid (p
, endp
, nptid
);
6155 /* In non-stop, we get an immediate OK reply. The stop reply will
6156 come in asynchronously by notification. */
6158 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6159 if (strcmp (rs
->buf
, "OK") != 0)
6160 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
6163 /* All-stop version of target_interrupt. Sends a break or a ^C to
6164 interrupt the remote target. It is undefined which thread of which
6165 process reports the interrupt. */
6168 remote_interrupt_as (void)
6170 struct remote_state
*rs
= get_remote_state ();
6172 rs
->ctrlc_pending_p
= 1;
6174 /* If the inferior is stopped already, but the core didn't know
6175 about it yet, just ignore the request. The cached wait status
6176 will be collected in remote_wait. */
6177 if (rs
->cached_wait_status
)
6180 /* Send interrupt_sequence to remote target. */
6181 send_interrupt_sequence ();
6184 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6185 the remote target. It is undefined which thread of which process
6186 reports the interrupt. Throws an error if the packet is not
6187 supported by the server. */
6190 remote_interrupt_ns (void)
6192 struct remote_state
*rs
= get_remote_state ();
6194 char *endp
= rs
->buf
+ get_remote_packet_size ();
6196 xsnprintf (p
, endp
- p
, "vCtrlC");
6198 /* In non-stop, we get an immediate OK reply. The stop reply will
6199 come in asynchronously by notification. */
6201 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6203 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6207 case PACKET_UNKNOWN
:
6208 error (_("No support for interrupting the remote target."));
6210 error (_("Interrupting target failed: %s"), rs
->buf
);
6214 /* Implement the to_stop function for the remote targets. */
6217 remote_stop (struct target_ops
*self
, ptid_t ptid
)
6220 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6222 if (target_is_non_stop_p ())
6223 remote_stop_ns (ptid
);
6226 /* We don't currently have a way to transparently pause the
6227 remote target in all-stop mode. Interrupt it instead. */
6228 remote_interrupt_as ();
6232 /* Implement the to_interrupt function for the remote targets. */
6235 remote_interrupt (struct target_ops
*self
, ptid_t ptid
)
6237 struct remote_state
*rs
= get_remote_state ();
6240 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6242 if (target_is_non_stop_p ())
6243 remote_interrupt_ns ();
6245 remote_interrupt_as ();
6248 /* Implement the to_pass_ctrlc function for the remote targets. */
6251 remote_pass_ctrlc (struct target_ops
*self
)
6253 struct remote_state
*rs
= get_remote_state ();
6256 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6258 /* If we're starting up, we're not fully synced yet. Quit
6260 if (rs
->starting_up
)
6262 /* If ^C has already been sent once, offer to disconnect. */
6263 else if (rs
->ctrlc_pending_p
)
6266 target_interrupt (inferior_ptid
);
6269 /* Ask the user what to do when an interrupt is received. */
6272 interrupt_query (void)
6274 struct remote_state
*rs
= get_remote_state ();
6276 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6278 if (query (_("The target is not responding to interrupt requests.\n"
6279 "Stop debugging it? ")))
6281 remote_unpush_target ();
6282 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6287 if (query (_("Interrupted while waiting for the program.\n"
6288 "Give up waiting? ")))
6293 /* Enable/disable target terminal ownership. Most targets can use
6294 terminal groups to control terminal ownership. Remote targets are
6295 different in that explicit transfer of ownership to/from GDB/target
6299 remote_terminal_inferior (struct target_ops
*self
)
6301 /* NOTE: At this point we could also register our selves as the
6302 recipient of all input. Any characters typed could then be
6303 passed on down to the target. */
6307 remote_terminal_ours (struct target_ops
*self
)
6312 remote_console_output (char *msg
)
6316 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6319 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6323 fputs_unfiltered (tb
, gdb_stdtarg
);
6325 gdb_flush (gdb_stdtarg
);
6328 DEF_VEC_O(cached_reg_t
);
6330 typedef struct stop_reply
6332 struct notif_event base
;
6334 /* The identifier of the thread about this event */
6337 /* The remote state this event is associated with. When the remote
6338 connection, represented by a remote_state object, is closed,
6339 all the associated stop_reply events should be released. */
6340 struct remote_state
*rs
;
6342 struct target_waitstatus ws
;
6344 /* The architecture associated with the expedited registers. */
6347 /* Expedited registers. This makes remote debugging a bit more
6348 efficient for those targets that provide critical registers as
6349 part of their normal status mechanism (as another roundtrip to
6350 fetch them is avoided). */
6351 VEC(cached_reg_t
) *regcache
;
6353 enum target_stop_reason stop_reason
;
6355 CORE_ADDR watch_data_address
;
6360 DECLARE_QUEUE_P (stop_reply_p
);
6361 DEFINE_QUEUE_P (stop_reply_p
);
6362 /* The list of already fetched and acknowledged stop events. This
6363 queue is used for notification Stop, and other notifications
6364 don't need queue for their events, because the notification events
6365 of Stop can't be consumed immediately, so that events should be
6366 queued first, and be consumed by remote_wait_{ns,as} one per
6367 time. Other notifications can consume their events immediately,
6368 so queue is not needed for them. */
6369 static QUEUE (stop_reply_p
) *stop_reply_queue
;
6372 stop_reply_xfree (struct stop_reply
*r
)
6374 notif_event_xfree ((struct notif_event
*) r
);
6377 /* Return the length of the stop reply queue. */
6380 stop_reply_queue_length (void)
6382 return QUEUE_length (stop_reply_p
, stop_reply_queue
);
6386 remote_notif_stop_parse (struct notif_client
*self
, char *buf
,
6387 struct notif_event
*event
)
6389 remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6393 remote_notif_stop_ack (struct notif_client
*self
, char *buf
,
6394 struct notif_event
*event
)
6396 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6399 putpkt (self
->ack_command
);
6401 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6402 /* We got an unknown stop reply. */
6403 error (_("Unknown stop reply"));
6405 push_stop_reply (stop_reply
);
6409 remote_notif_stop_can_get_pending_events (struct notif_client
*self
)
6411 /* We can't get pending events in remote_notif_process for
6412 notification stop, and we have to do this in remote_wait_ns
6413 instead. If we fetch all queued events from stub, remote stub
6414 may exit and we have no chance to process them back in
6416 mark_async_event_handler (remote_async_inferior_event_token
);
6421 stop_reply_dtr (struct notif_event
*event
)
6423 struct stop_reply
*r
= (struct stop_reply
*) event
;
6428 VEC_iterate (cached_reg_t
, r
->regcache
, ix
, reg
);
6432 VEC_free (cached_reg_t
, r
->regcache
);
6435 static struct notif_event
*
6436 remote_notif_stop_alloc_reply (void)
6438 /* We cast to a pointer to the "base class". */
6439 struct notif_event
*r
= (struct notif_event
*) XNEW (struct stop_reply
);
6441 r
->dtr
= stop_reply_dtr
;
6446 /* A client of notification Stop. */
6448 struct notif_client notif_client_stop
=
6452 remote_notif_stop_parse
,
6453 remote_notif_stop_ack
,
6454 remote_notif_stop_can_get_pending_events
,
6455 remote_notif_stop_alloc_reply
,
6459 /* A parameter to pass data in and out. */
6461 struct queue_iter_param
6464 struct stop_reply
*output
;
6467 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6468 the pid of the process that owns the threads we want to check, or
6469 -1 if we want to check all threads. */
6472 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6475 if (ws
->kind
== TARGET_WAITKIND_FORKED
6476 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6478 if (event_pid
== -1 || event_pid
== ptid_get_pid (thread_ptid
))
6485 /* Return the thread's pending status used to determine whether the
6486 thread is a fork parent stopped at a fork event. */
6488 static struct target_waitstatus
*
6489 thread_pending_fork_status (struct thread_info
*thread
)
6491 if (thread
->suspend
.waitstatus_pending_p
)
6492 return &thread
->suspend
.waitstatus
;
6494 return &thread
->pending_follow
;
6497 /* Determine if THREAD is a pending fork parent thread. */
6500 is_pending_fork_parent_thread (struct thread_info
*thread
)
6502 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6505 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
6508 /* Check whether EVENT is a fork event, and if it is, remove the
6509 fork child from the context list passed in DATA. */
6512 remove_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
6513 QUEUE_ITER (stop_reply_p
) *iter
,
6517 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6518 struct threads_listing_context
*context
6519 = (struct threads_listing_context
*) param
->input
;
6521 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6522 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
6523 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
6524 threads_listing_context_remove (&event
->ws
, context
);
6529 /* If CONTEXT contains any fork child threads that have not been
6530 reported yet, remove them from the CONTEXT list. If such a
6531 thread exists it is because we are stopped at a fork catchpoint
6532 and have not yet called follow_fork, which will set up the
6533 host-side data structures for the new process. */
6536 remove_new_fork_children (struct threads_listing_context
*context
)
6538 struct thread_info
* thread
;
6540 struct notif_client
*notif
= ¬if_client_stop
;
6541 struct queue_iter_param param
;
6543 /* For any threads stopped at a fork event, remove the corresponding
6544 fork child threads from the CONTEXT list. */
6545 ALL_NON_EXITED_THREADS (thread
)
6547 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6549 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
6551 threads_listing_context_remove (ws
, context
);
6555 /* Check for any pending fork events (not reported or processed yet)
6556 in process PID and remove those fork child threads from the
6557 CONTEXT list as well. */
6558 remote_notif_get_pending_events (notif
);
6559 param
.input
= context
;
6560 param
.output
= NULL
;
6561 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6562 remove_child_of_pending_fork
, ¶m
);
6565 /* Check whether EVENT would prevent a global or process wildcard
6569 check_pending_event_prevents_wildcard_vcont_callback
6570 (QUEUE (stop_reply_p
) *q
,
6571 QUEUE_ITER (stop_reply_p
) *iter
,
6575 struct inferior
*inf
;
6576 int *may_global_wildcard_vcont
= (int *) data
;
6578 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
6579 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
6582 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6583 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
6584 *may_global_wildcard_vcont
= 0;
6586 inf
= find_inferior_ptid (event
->ptid
);
6588 /* This may be the first time we heard about this process.
6589 Regardless, we must not do a global wildcard resume, otherwise
6590 we'd resume this process too. */
6591 *may_global_wildcard_vcont
= 0;
6593 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
6598 /* Check whether any event pending in the vStopped queue would prevent
6599 a global or process wildcard vCont action. Clear
6600 *may_global_wildcard if we can't do a global wildcard (vCont;c),
6601 and clear the event inferior's may_wildcard_vcont flag if we can't
6602 do a process-wide wildcard resume (vCont;c:pPID.-1). */
6605 check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard
)
6607 struct notif_client
*notif
= ¬if_client_stop
;
6609 remote_notif_get_pending_events (notif
);
6610 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6611 check_pending_event_prevents_wildcard_vcont_callback
,
6612 may_global_wildcard
);
6615 /* Remove stop replies in the queue if its pid is equal to the given
6619 remove_stop_reply_for_inferior (QUEUE (stop_reply_p
) *q
,
6620 QUEUE_ITER (stop_reply_p
) *iter
,
6624 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6625 struct inferior
*inf
= (struct inferior
*) param
->input
;
6627 if (ptid_get_pid (event
->ptid
) == inf
->pid
)
6629 stop_reply_xfree (event
);
6630 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6636 /* Discard all pending stop replies of inferior INF. */
6639 discard_pending_stop_replies (struct inferior
*inf
)
6641 struct queue_iter_param param
;
6642 struct stop_reply
*reply
;
6643 struct remote_state
*rs
= get_remote_state ();
6644 struct remote_notif_state
*rns
= rs
->notif_state
;
6646 /* This function can be notified when an inferior exists. When the
6647 target is not remote, the notification state is NULL. */
6648 if (rs
->remote_desc
== NULL
)
6651 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
6653 /* Discard the in-flight notification. */
6654 if (reply
!= NULL
&& ptid_get_pid (reply
->ptid
) == inf
->pid
)
6656 stop_reply_xfree (reply
);
6657 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
6661 param
.output
= NULL
;
6662 /* Discard the stop replies we have already pulled with
6664 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6665 remove_stop_reply_for_inferior
, ¶m
);
6668 /* If its remote state is equal to the given remote state,
6669 remove EVENT from the stop reply queue. */
6672 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p
) *q
,
6673 QUEUE_ITER (stop_reply_p
) *iter
,
6677 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6678 struct remote_state
*rs
= (struct remote_state
*) param
->input
;
6680 if (event
->rs
== rs
)
6682 stop_reply_xfree (event
);
6683 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6689 /* Discard the stop replies for RS in stop_reply_queue. */
6692 discard_pending_stop_replies_in_queue (struct remote_state
*rs
)
6694 struct queue_iter_param param
;
6697 param
.output
= NULL
;
6698 /* Discard the stop replies we have already pulled with
6700 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6701 remove_stop_reply_of_remote_state
, ¶m
);
6704 /* A parameter to pass data in and out. */
6707 remote_notif_remove_once_on_match (QUEUE (stop_reply_p
) *q
,
6708 QUEUE_ITER (stop_reply_p
) *iter
,
6712 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6713 ptid_t
*ptid
= (ptid_t
*) param
->input
;
6715 if (ptid_match (event
->ptid
, *ptid
))
6717 param
->output
= event
;
6718 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6725 /* Remove the first reply in 'stop_reply_queue' which matches
6728 static struct stop_reply
*
6729 remote_notif_remove_queued_reply (ptid_t ptid
)
6731 struct queue_iter_param param
;
6733 param
.input
= &ptid
;
6734 param
.output
= NULL
;
6736 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6737 remote_notif_remove_once_on_match
, ¶m
);
6739 fprintf_unfiltered (gdb_stdlog
,
6740 "notif: discard queued event: 'Stop' in %s\n",
6741 target_pid_to_str (ptid
));
6743 return param
.output
;
6746 /* Look for a queued stop reply belonging to PTID. If one is found,
6747 remove it from the queue, and return it. Returns NULL if none is
6748 found. If there are still queued events left to process, tell the
6749 event loop to get back to target_wait soon. */
6751 static struct stop_reply
*
6752 queued_stop_reply (ptid_t ptid
)
6754 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
6756 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
6757 /* There's still at least an event left. */
6758 mark_async_event_handler (remote_async_inferior_event_token
);
6763 /* Push a fully parsed stop reply in the stop reply queue. Since we
6764 know that we now have at least one queued event left to pass to the
6765 core side, tell the event loop to get back to target_wait soon. */
6768 push_stop_reply (struct stop_reply
*new_event
)
6770 QUEUE_enque (stop_reply_p
, stop_reply_queue
, new_event
);
6773 fprintf_unfiltered (gdb_stdlog
,
6774 "notif: push 'Stop' %s to queue %d\n",
6775 target_pid_to_str (new_event
->ptid
),
6776 QUEUE_length (stop_reply_p
,
6779 mark_async_event_handler (remote_async_inferior_event_token
);
6783 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p
) *q
,
6784 QUEUE_ITER (stop_reply_p
) *iter
,
6785 struct stop_reply
*event
,
6788 ptid_t
*ptid
= (ptid_t
*) data
;
6790 return !(ptid_equal (*ptid
, event
->ptid
)
6791 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
);
6794 /* Returns true if we have a stop reply for PTID. */
6797 peek_stop_reply (ptid_t ptid
)
6799 return !QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6800 stop_reply_match_ptid_and_ws
, &ptid
);
6803 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6804 starting with P and ending with PEND matches PREFIX. */
6807 strprefix (const char *p
, const char *pend
, const char *prefix
)
6809 for ( ; p
< pend
; p
++, prefix
++)
6812 return *prefix
== '\0';
6815 /* Parse the stop reply in BUF. Either the function succeeds, and the
6816 result is stored in EVENT, or throws an error. */
6819 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
6821 remote_arch_state
*rsa
= NULL
;
6826 event
->ptid
= null_ptid
;
6827 event
->rs
= get_remote_state ();
6828 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
6829 event
->ws
.value
.integer
= 0;
6830 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6831 event
->regcache
= NULL
;
6836 case 'T': /* Status with PC, SP, FP, ... */
6837 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6838 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6840 n... = register number
6841 r... = register contents
6844 p
= &buf
[3]; /* after Txx */
6850 p1
= strchr (p
, ':');
6852 error (_("Malformed packet(a) (missing colon): %s\n\
6856 error (_("Malformed packet(a) (missing register number): %s\n\
6860 /* Some "registers" are actually extended stop information.
6861 Note if you're adding a new entry here: GDB 7.9 and
6862 earlier assume that all register "numbers" that start
6863 with an hex digit are real register numbers. Make sure
6864 the server only sends such a packet if it knows the
6865 client understands it. */
6867 if (strprefix (p
, p1
, "thread"))
6868 event
->ptid
= read_ptid (++p1
, &p
);
6869 else if (strprefix (p
, p1
, "syscall_entry"))
6873 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
6874 p
= unpack_varlen_hex (++p1
, &sysno
);
6875 event
->ws
.value
.syscall_number
= (int) sysno
;
6877 else if (strprefix (p
, p1
, "syscall_return"))
6881 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
6882 p
= unpack_varlen_hex (++p1
, &sysno
);
6883 event
->ws
.value
.syscall_number
= (int) sysno
;
6885 else if (strprefix (p
, p1
, "watch")
6886 || strprefix (p
, p1
, "rwatch")
6887 || strprefix (p
, p1
, "awatch"))
6889 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
6890 p
= unpack_varlen_hex (++p1
, &addr
);
6891 event
->watch_data_address
= (CORE_ADDR
) addr
;
6893 else if (strprefix (p
, p1
, "swbreak"))
6895 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
6897 /* Make sure the stub doesn't forget to indicate support
6899 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
6900 error (_("Unexpected swbreak stop reason"));
6902 /* The value part is documented as "must be empty",
6903 though we ignore it, in case we ever decide to make
6904 use of it in a backward compatible way. */
6905 p
= strchrnul (p1
+ 1, ';');
6907 else if (strprefix (p
, p1
, "hwbreak"))
6909 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
6911 /* Make sure the stub doesn't forget to indicate support
6913 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
6914 error (_("Unexpected hwbreak stop reason"));
6917 p
= strchrnul (p1
+ 1, ';');
6919 else if (strprefix (p
, p1
, "library"))
6921 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
6922 p
= strchrnul (p1
+ 1, ';');
6924 else if (strprefix (p
, p1
, "replaylog"))
6926 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
6927 /* p1 will indicate "begin" or "end", but it makes
6928 no difference for now, so ignore it. */
6929 p
= strchrnul (p1
+ 1, ';');
6931 else if (strprefix (p
, p1
, "core"))
6935 p
= unpack_varlen_hex (++p1
, &c
);
6938 else if (strprefix (p
, p1
, "fork"))
6940 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6941 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
6943 else if (strprefix (p
, p1
, "vfork"))
6945 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6946 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
6948 else if (strprefix (p
, p1
, "vforkdone"))
6950 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
6951 p
= strchrnul (p1
+ 1, ';');
6953 else if (strprefix (p
, p1
, "exec"))
6956 char pathname
[PATH_MAX
];
6959 /* Determine the length of the execd pathname. */
6960 p
= unpack_varlen_hex (++p1
, &ignored
);
6961 pathlen
= (p
- p1
) / 2;
6963 /* Save the pathname for event reporting and for
6964 the next run command. */
6965 hex2bin (p1
, (gdb_byte
*) pathname
, pathlen
);
6966 pathname
[pathlen
] = '\0';
6968 /* This is freed during event handling. */
6969 event
->ws
.value
.execd_pathname
= xstrdup (pathname
);
6970 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
6972 /* Skip the registers included in this packet, since
6973 they may be for an architecture different from the
6974 one used by the original program. */
6977 else if (strprefix (p
, p1
, "create"))
6979 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
6980 p
= strchrnul (p1
+ 1, ';');
6989 p
= strchrnul (p1
+ 1, ';');
6994 /* Maybe a real ``P'' register number. */
6995 p_temp
= unpack_varlen_hex (p
, &pnum
);
6996 /* If the first invalid character is the colon, we got a
6997 register number. Otherwise, it's an unknown stop
7001 /* If we haven't parsed the event's thread yet, find
7002 it now, in order to find the architecture of the
7003 reported expedited registers. */
7004 if (event
->ptid
== null_ptid
)
7006 const char *thr
= strstr (p1
+ 1, ";thread:");
7008 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7011 event
->ptid
= magic_null_ptid
;
7016 inferior
*inf
= (event
->ptid
== null_ptid
7018 : find_inferior_ptid (event
->ptid
));
7019 /* If this is the first time we learn anything
7020 about this process, skip the registers
7021 included in this packet, since we don't yet
7022 know which architecture to use to parse them.
7023 We'll determine the architecture later when
7024 we process the stop reply and retrieve the
7025 target description, via
7026 remote_notice_new_inferior ->
7027 post_create_inferior. */
7030 p
= strchrnul (p1
+ 1, ';');
7035 event
->arch
= inf
->gdbarch
;
7036 rsa
= get_remote_arch_state (event
->arch
);
7040 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7041 cached_reg_t cached_reg
;
7044 error (_("Remote sent bad register number %s: %s\n\
7046 hex_string (pnum
), p
, buf
);
7048 cached_reg
.num
= reg
->regnum
;
7049 cached_reg
.data
= (gdb_byte
*)
7050 xmalloc (register_size (event
->arch
, reg
->regnum
));
7053 fieldsize
= hex2bin (p
, cached_reg
.data
,
7054 register_size (event
->arch
, reg
->regnum
));
7056 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7057 warning (_("Remote reply is too short: %s"), buf
);
7059 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
7063 /* Not a number. Silently skip unknown optional
7065 p
= strchrnul (p1
+ 1, ';');
7070 error (_("Remote register badly formatted: %s\nhere: %s"),
7075 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7079 case 'S': /* Old style status, just signal only. */
7083 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7084 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7085 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7086 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7088 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7091 case 'w': /* Thread exited. */
7096 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7097 p
= unpack_varlen_hex (&buf
[1], &value
);
7098 event
->ws
.value
.integer
= value
;
7100 error (_("stop reply packet badly formatted: %s"), buf
);
7101 event
->ptid
= read_ptid (++p
, NULL
);
7104 case 'W': /* Target exited. */
7111 /* GDB used to accept only 2 hex chars here. Stubs should
7112 only send more if they detect GDB supports multi-process
7114 p
= unpack_varlen_hex (&buf
[1], &value
);
7118 /* The remote process exited. */
7119 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7120 event
->ws
.value
.integer
= value
;
7124 /* The remote process exited with a signal. */
7125 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7126 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7127 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7129 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7132 /* If no process is specified, assume inferior_ptid. */
7133 pid
= ptid_get_pid (inferior_ptid
);
7142 else if (startswith (p
, "process:"))
7146 p
+= sizeof ("process:") - 1;
7147 unpack_varlen_hex (p
, &upid
);
7151 error (_("unknown stop reply packet: %s"), buf
);
7154 error (_("unknown stop reply packet: %s"), buf
);
7155 event
->ptid
= pid_to_ptid (pid
);
7159 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7160 event
->ptid
= minus_one_ptid
;
7164 if (target_is_non_stop_p () && ptid_equal (event
->ptid
, null_ptid
))
7165 error (_("No process or thread specified in stop reply: %s"), buf
);
7168 /* When the stub wants to tell GDB about a new notification reply, it
7169 sends a notification (%Stop, for example). Those can come it at
7170 any time, hence, we have to make sure that any pending
7171 putpkt/getpkt sequence we're making is finished, before querying
7172 the stub for more events with the corresponding ack command
7173 (vStopped, for example). E.g., if we started a vStopped sequence
7174 immediately upon receiving the notification, something like this
7182 1.6) <-- (registers reply to step #1.3)
7184 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7187 To solve this, whenever we parse a %Stop notification successfully,
7188 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7189 doing whatever we were doing:
7195 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7196 2.5) <-- (registers reply to step #2.3)
7198 Eventualy after step #2.5, we return to the event loop, which
7199 notices there's an event on the
7200 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7201 associated callback --- the function below. At this point, we're
7202 always safe to start a vStopped sequence. :
7205 2.7) <-- T05 thread:2
7211 remote_notif_get_pending_events (struct notif_client
*nc
)
7213 struct remote_state
*rs
= get_remote_state ();
7215 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7218 fprintf_unfiltered (gdb_stdlog
,
7219 "notif: process: '%s' ack pending event\n",
7223 nc
->ack (nc
, rs
->buf
, rs
->notif_state
->pending_event
[nc
->id
]);
7224 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7228 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7229 if (strcmp (rs
->buf
, "OK") == 0)
7232 remote_notif_ack (nc
, rs
->buf
);
7238 fprintf_unfiltered (gdb_stdlog
,
7239 "notif: process: '%s' no pending reply\n",
7244 /* Called when it is decided that STOP_REPLY holds the info of the
7245 event that is to be returned to the core. This function always
7246 destroys STOP_REPLY. */
7249 process_stop_reply (struct stop_reply
*stop_reply
,
7250 struct target_waitstatus
*status
)
7254 *status
= stop_reply
->ws
;
7255 ptid
= stop_reply
->ptid
;
7257 /* If no thread/process was reported by the stub, assume the current
7259 if (ptid_equal (ptid
, null_ptid
))
7260 ptid
= inferior_ptid
;
7262 if (status
->kind
!= TARGET_WAITKIND_EXITED
7263 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7264 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7266 struct private_thread_info
*remote_thr
;
7268 /* Expedited registers. */
7269 if (stop_reply
->regcache
)
7271 struct regcache
*regcache
7272 = get_thread_arch_regcache (ptid
, stop_reply
->arch
);
7277 VEC_iterate (cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
7280 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
7284 VEC_free (cached_reg_t
, stop_reply
->regcache
);
7287 remote_notice_new_inferior (ptid
, 0);
7288 remote_thr
= get_private_info_ptid (ptid
);
7289 remote_thr
->core
= stop_reply
->core
;
7290 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7291 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7292 remote_thr
->vcont_resumed
= 0;
7295 stop_reply_xfree (stop_reply
);
7299 /* The non-stop mode version of target_wait. */
7302 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7304 struct remote_state
*rs
= get_remote_state ();
7305 struct stop_reply
*stop_reply
;
7309 /* If in non-stop mode, get out of getpkt even if a
7310 notification is received. */
7312 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7313 0 /* forever */, &is_notif
);
7316 if (ret
!= -1 && !is_notif
)
7319 case 'E': /* Error of some sort. */
7320 /* We're out of sync with the target now. Did it continue
7321 or not? We can't tell which thread it was in non-stop,
7322 so just ignore this. */
7323 warning (_("Remote failure reply: %s"), rs
->buf
);
7325 case 'O': /* Console output. */
7326 remote_console_output (rs
->buf
+ 1);
7329 warning (_("Invalid remote reply: %s"), rs
->buf
);
7333 /* Acknowledge a pending stop reply that may have arrived in the
7335 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7336 remote_notif_get_pending_events (¬if_client_stop
);
7338 /* If indeed we noticed a stop reply, we're done. */
7339 stop_reply
= queued_stop_reply (ptid
);
7340 if (stop_reply
!= NULL
)
7341 return process_stop_reply (stop_reply
, status
);
7343 /* Still no event. If we're just polling for an event, then
7344 return to the event loop. */
7345 if (options
& TARGET_WNOHANG
)
7347 status
->kind
= TARGET_WAITKIND_IGNORE
;
7348 return minus_one_ptid
;
7351 /* Otherwise do a blocking wait. */
7352 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7353 1 /* forever */, &is_notif
);
7357 /* Wait until the remote machine stops, then return, storing status in
7358 STATUS just as `wait' would. */
7361 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7363 struct remote_state
*rs
= get_remote_state ();
7364 ptid_t event_ptid
= null_ptid
;
7366 struct stop_reply
*stop_reply
;
7370 status
->kind
= TARGET_WAITKIND_IGNORE
;
7371 status
->value
.integer
= 0;
7373 stop_reply
= queued_stop_reply (ptid
);
7374 if (stop_reply
!= NULL
)
7375 return process_stop_reply (stop_reply
, status
);
7377 if (rs
->cached_wait_status
)
7378 /* Use the cached wait status, but only once. */
7379 rs
->cached_wait_status
= 0;
7384 int forever
= ((options
& TARGET_WNOHANG
) == 0
7385 && wait_forever_enabled_p
);
7387 if (!rs
->waiting_for_stop_reply
)
7389 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7390 return minus_one_ptid
;
7393 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7394 _never_ wait for ever -> test on target_is_async_p().
7395 However, before we do that we need to ensure that the caller
7396 knows how to take the target into/out of async mode. */
7397 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7398 forever
, &is_notif
);
7400 /* GDB gets a notification. Return to core as this event is
7402 if (ret
!= -1 && is_notif
)
7403 return minus_one_ptid
;
7405 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7406 return minus_one_ptid
;
7411 /* Assume that the target has acknowledged Ctrl-C unless we receive
7412 an 'F' or 'O' packet. */
7413 if (buf
[0] != 'F' && buf
[0] != 'O')
7414 rs
->ctrlc_pending_p
= 0;
7418 case 'E': /* Error of some sort. */
7419 /* We're out of sync with the target now. Did it continue or
7420 not? Not is more likely, so report a stop. */
7421 rs
->waiting_for_stop_reply
= 0;
7423 warning (_("Remote failure reply: %s"), buf
);
7424 status
->kind
= TARGET_WAITKIND_STOPPED
;
7425 status
->value
.sig
= GDB_SIGNAL_0
;
7427 case 'F': /* File-I/O request. */
7428 /* GDB may access the inferior memory while handling the File-I/O
7429 request, but we don't want GDB accessing memory while waiting
7430 for a stop reply. See the comments in putpkt_binary. Set
7431 waiting_for_stop_reply to 0 temporarily. */
7432 rs
->waiting_for_stop_reply
= 0;
7433 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
7434 rs
->ctrlc_pending_p
= 0;
7435 /* GDB handled the File-I/O request, and the target is running
7436 again. Keep waiting for events. */
7437 rs
->waiting_for_stop_reply
= 1;
7439 case 'N': case 'T': case 'S': case 'X': case 'W':
7441 struct stop_reply
*stop_reply
;
7443 /* There is a stop reply to handle. */
7444 rs
->waiting_for_stop_reply
= 0;
7447 = (struct stop_reply
*) remote_notif_parse (¬if_client_stop
,
7450 event_ptid
= process_stop_reply (stop_reply
, status
);
7453 case 'O': /* Console output. */
7454 remote_console_output (buf
+ 1);
7457 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7459 /* Zero length reply means that we tried 'S' or 'C' and the
7460 remote system doesn't support it. */
7461 target_terminal::ours_for_output ();
7463 ("Can't send signals to this remote system. %s not sent.\n",
7464 gdb_signal_to_name (rs
->last_sent_signal
));
7465 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7466 target_terminal::inferior ();
7468 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7472 /* else fallthrough */
7474 warning (_("Invalid remote reply: %s"), buf
);
7478 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7479 return minus_one_ptid
;
7480 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7482 /* Nothing interesting happened. If we're doing a non-blocking
7483 poll, we're done. Otherwise, go back to waiting. */
7484 if (options
& TARGET_WNOHANG
)
7485 return minus_one_ptid
;
7489 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7490 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7492 if (!ptid_equal (event_ptid
, null_ptid
))
7493 record_currthread (rs
, event_ptid
);
7495 event_ptid
= inferior_ptid
;
7498 /* A process exit. Invalidate our notion of current thread. */
7499 record_currthread (rs
, minus_one_ptid
);
7504 /* Wait until the remote machine stops, then return, storing status in
7505 STATUS just as `wait' would. */
7508 remote_wait (struct target_ops
*ops
,
7509 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7513 if (target_is_non_stop_p ())
7514 event_ptid
= remote_wait_ns (ptid
, status
, options
);
7516 event_ptid
= remote_wait_as (ptid
, status
, options
);
7518 if (target_is_async_p ())
7520 /* If there are are events left in the queue tell the event loop
7522 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
7523 mark_async_event_handler (remote_async_inferior_event_token
);
7529 /* Fetch a single register using a 'p' packet. */
7532 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
7534 struct gdbarch
*gdbarch
= regcache
->arch ();
7535 struct remote_state
*rs
= get_remote_state ();
7537 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7540 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
7543 if (reg
->pnum
== -1)
7548 p
+= hexnumstr (p
, reg
->pnum
);
7551 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7555 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
7559 case PACKET_UNKNOWN
:
7562 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7563 gdbarch_register_name (regcache
->arch (),
7568 /* If this register is unfetchable, tell the regcache. */
7571 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7575 /* Otherwise, parse and supply the value. */
7581 error (_("fetch_register_using_p: early buf termination"));
7583 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7586 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
7590 /* Fetch the registers included in the target's 'g' packet. */
7593 send_g_packet (void)
7595 struct remote_state
*rs
= get_remote_state ();
7598 xsnprintf (rs
->buf
, get_remote_packet_size (), "g");
7599 remote_send (&rs
->buf
, &rs
->buf_size
);
7601 /* We can get out of synch in various cases. If the first character
7602 in the buffer is not a hex character, assume that has happened
7603 and try to fetch another packet to read. */
7604 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
7605 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
7606 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
7607 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
7610 fprintf_unfiltered (gdb_stdlog
,
7611 "Bad register packet; fetching a new packet\n");
7612 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7615 buf_len
= strlen (rs
->buf
);
7617 /* Sanity check the received packet. */
7618 if (buf_len
% 2 != 0)
7619 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
7625 process_g_packet (struct regcache
*regcache
)
7627 struct gdbarch
*gdbarch
= regcache
->arch ();
7628 struct remote_state
*rs
= get_remote_state ();
7629 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7634 buf_len
= strlen (rs
->buf
);
7636 /* Further sanity checks, with knowledge of the architecture. */
7637 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
7638 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
7639 "bytes): %s"), rsa
->sizeof_g_packet
, buf_len
/ 2, rs
->buf
);
7641 /* Save the size of the packet sent to us by the target. It is used
7642 as a heuristic when determining the max size of packets that the
7643 target can safely receive. */
7644 if (rsa
->actual_register_packet_size
== 0)
7645 rsa
->actual_register_packet_size
= buf_len
;
7647 /* If this is smaller than we guessed the 'g' packet would be,
7648 update our records. A 'g' reply that doesn't include a register's
7649 value implies either that the register is not available, or that
7650 the 'p' packet must be used. */
7651 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
7653 long sizeof_g_packet
= buf_len
/ 2;
7655 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7657 long offset
= rsa
->regs
[i
].offset
;
7658 long reg_size
= register_size (gdbarch
, i
);
7660 if (rsa
->regs
[i
].pnum
== -1)
7663 if (offset
>= sizeof_g_packet
)
7664 rsa
->regs
[i
].in_g_packet
= 0;
7665 else if (offset
+ reg_size
> sizeof_g_packet
)
7666 error (_("Truncated register %d in remote 'g' packet"), i
);
7668 rsa
->regs
[i
].in_g_packet
= 1;
7671 /* Looks valid enough, we can assume this is the correct length
7672 for a 'g' packet. It's important not to adjust
7673 rsa->sizeof_g_packet if we have truncated registers otherwise
7674 this "if" won't be run the next time the method is called
7675 with a packet of the same size and one of the internal errors
7676 below will trigger instead. */
7677 rsa
->sizeof_g_packet
= sizeof_g_packet
;
7680 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
7682 /* Unimplemented registers read as all bits zero. */
7683 memset (regs
, 0, rsa
->sizeof_g_packet
);
7685 /* Reply describes registers byte by byte, each byte encoded as two
7686 hex characters. Suck them all up, then supply them to the
7687 register cacheing/storage mechanism. */
7690 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
7692 if (p
[0] == 0 || p
[1] == 0)
7693 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7694 internal_error (__FILE__
, __LINE__
,
7695 _("unexpected end of 'g' packet reply"));
7697 if (p
[0] == 'x' && p
[1] == 'x')
7698 regs
[i
] = 0; /* 'x' */
7700 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7704 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7706 struct packet_reg
*r
= &rsa
->regs
[i
];
7707 long reg_size
= register_size (gdbarch
, i
);
7711 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
))
7712 /* This shouldn't happen - we adjusted in_g_packet above. */
7713 internal_error (__FILE__
, __LINE__
,
7714 _("unexpected end of 'g' packet reply"));
7715 else if (rs
->buf
[r
->offset
* 2] == 'x')
7717 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
7718 /* The register isn't available, mark it as such (at
7719 the same time setting the value to zero). */
7720 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
7723 regcache_raw_supply (regcache
, r
->regnum
,
7730 fetch_registers_using_g (struct regcache
*regcache
)
7733 process_g_packet (regcache
);
7736 /* Make the remote selected traceframe match GDB's selected
7740 set_remote_traceframe (void)
7743 struct remote_state
*rs
= get_remote_state ();
7745 if (rs
->remote_traceframe_number
== get_traceframe_number ())
7748 /* Avoid recursion, remote_trace_find calls us again. */
7749 rs
->remote_traceframe_number
= get_traceframe_number ();
7751 newnum
= target_trace_find (tfind_number
,
7752 get_traceframe_number (), 0, 0, NULL
);
7754 /* Should not happen. If it does, all bets are off. */
7755 if (newnum
!= get_traceframe_number ())
7756 warning (_("could not set remote traceframe"));
7760 remote_fetch_registers (struct target_ops
*ops
,
7761 struct regcache
*regcache
, int regnum
)
7763 struct gdbarch
*gdbarch
= regcache
->arch ();
7764 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7767 set_remote_traceframe ();
7768 set_general_thread (regcache_get_ptid (regcache
));
7772 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7774 gdb_assert (reg
!= NULL
);
7776 /* If this register might be in the 'g' packet, try that first -
7777 we are likely to read more than one register. If this is the
7778 first 'g' packet, we might be overly optimistic about its
7779 contents, so fall back to 'p'. */
7780 if (reg
->in_g_packet
)
7782 fetch_registers_using_g (regcache
);
7783 if (reg
->in_g_packet
)
7787 if (fetch_register_using_p (regcache
, reg
))
7790 /* This register is not available. */
7791 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7796 fetch_registers_using_g (regcache
);
7798 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7799 if (!rsa
->regs
[i
].in_g_packet
)
7800 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
7802 /* This register is not available. */
7803 regcache_raw_supply (regcache
, i
, NULL
);
7807 /* Prepare to store registers. Since we may send them all (using a
7808 'G' request), we have to read out the ones we don't want to change
7812 remote_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
7814 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7817 /* Make sure the entire registers array is valid. */
7818 switch (packet_support (PACKET_P
))
7820 case PACKET_DISABLE
:
7821 case PACKET_SUPPORT_UNKNOWN
:
7822 /* Make sure all the necessary registers are cached. */
7823 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7824 if (rsa
->regs
[i
].in_g_packet
)
7825 regcache_raw_update (regcache
, rsa
->regs
[i
].regnum
);
7832 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7833 packet was not recognized. */
7836 store_register_using_P (const struct regcache
*regcache
,
7837 struct packet_reg
*reg
)
7839 struct gdbarch
*gdbarch
= regcache
->arch ();
7840 struct remote_state
*rs
= get_remote_state ();
7841 /* Try storing a single register. */
7842 char *buf
= rs
->buf
;
7843 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7846 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
7849 if (reg
->pnum
== -1)
7852 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
7853 p
= buf
+ strlen (buf
);
7854 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
7855 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
7857 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7859 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
7864 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7865 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
7866 case PACKET_UNKNOWN
:
7869 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
7873 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7874 contents of the register cache buffer. FIXME: ignores errors. */
7877 store_registers_using_G (const struct regcache
*regcache
)
7879 struct remote_state
*rs
= get_remote_state ();
7880 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7884 /* Extract all the registers in the regcache copying them into a
7889 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
7890 memset (regs
, 0, rsa
->sizeof_g_packet
);
7891 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7893 struct packet_reg
*r
= &rsa
->regs
[i
];
7896 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
7900 /* Command describes registers byte by byte,
7901 each byte encoded as two hex characters. */
7904 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
7906 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7907 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7908 error (_("Could not write registers; remote failure reply '%s'"),
7912 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7913 of the register cache buffer. FIXME: ignores errors. */
7916 remote_store_registers (struct target_ops
*ops
,
7917 struct regcache
*regcache
, int regnum
)
7919 struct gdbarch
*gdbarch
= regcache
->arch ();
7920 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7923 set_remote_traceframe ();
7924 set_general_thread (regcache_get_ptid (regcache
));
7928 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7930 gdb_assert (reg
!= NULL
);
7932 /* Always prefer to store registers using the 'P' packet if
7933 possible; we often change only a small number of registers.
7934 Sometimes we change a larger number; we'd need help from a
7935 higher layer to know to use 'G'. */
7936 if (store_register_using_P (regcache
, reg
))
7939 /* For now, don't complain if we have no way to write the
7940 register. GDB loses track of unavailable registers too
7941 easily. Some day, this may be an error. We don't have
7942 any way to read the register, either... */
7943 if (!reg
->in_g_packet
)
7946 store_registers_using_G (regcache
);
7950 store_registers_using_G (regcache
);
7952 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7953 if (!rsa
->regs
[i
].in_g_packet
)
7954 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
7955 /* See above for why we do not issue an error here. */
7960 /* Return the number of hex digits in num. */
7963 hexnumlen (ULONGEST num
)
7967 for (i
= 0; num
!= 0; i
++)
7970 return std::max (i
, 1);
7973 /* Set BUF to the minimum number of hex digits representing NUM. */
7976 hexnumstr (char *buf
, ULONGEST num
)
7978 int len
= hexnumlen (num
);
7980 return hexnumnstr (buf
, num
, len
);
7984 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7987 hexnumnstr (char *buf
, ULONGEST num
, int width
)
7993 for (i
= width
- 1; i
>= 0; i
--)
7995 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8002 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8005 remote_address_masked (CORE_ADDR addr
)
8007 unsigned int address_size
= remote_address_size
;
8009 /* If "remoteaddresssize" was not set, default to target address size. */
8011 address_size
= gdbarch_addr_bit (target_gdbarch ());
8013 if (address_size
> 0
8014 && address_size
< (sizeof (ULONGEST
) * 8))
8016 /* Only create a mask when that mask can safely be constructed
8017 in a ULONGEST variable. */
8020 mask
= (mask
<< address_size
) - 1;
8026 /* Determine whether the remote target supports binary downloading.
8027 This is accomplished by sending a no-op memory write of zero length
8028 to the target at the specified address. It does not suffice to send
8029 the whole packet, since many stubs strip the eighth bit and
8030 subsequently compute a wrong checksum, which causes real havoc with
8033 NOTE: This can still lose if the serial line is not eight-bit
8034 clean. In cases like this, the user should clear "remote
8038 check_binary_download (CORE_ADDR addr
)
8040 struct remote_state
*rs
= get_remote_state ();
8042 switch (packet_support (PACKET_X
))
8044 case PACKET_DISABLE
:
8048 case PACKET_SUPPORT_UNKNOWN
:
8054 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8056 p
+= hexnumstr (p
, (ULONGEST
) 0);
8060 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8061 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8063 if (rs
->buf
[0] == '\0')
8066 fprintf_unfiltered (gdb_stdlog
,
8067 "binary downloading NOT "
8068 "supported by target\n");
8069 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8074 fprintf_unfiltered (gdb_stdlog
,
8075 "binary downloading supported by target\n");
8076 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8083 /* Helper function to resize the payload in order to try to get a good
8084 alignment. We try to write an amount of data such that the next write will
8085 start on an address aligned on REMOTE_ALIGN_WRITES. */
8088 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8090 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8093 /* Write memory data directly to the remote machine.
8094 This does not inform the data cache; the data cache uses this.
8095 HEADER is the starting part of the packet.
8096 MEMADDR is the address in the remote memory space.
8097 MYADDR is the address of the buffer in our space.
8098 LEN_UNITS is the number of addressable units to write.
8099 UNIT_SIZE is the length in bytes of an addressable unit.
8100 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8101 should send data as binary ('X'), or hex-encoded ('M').
8103 The function creates packet of the form
8104 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8106 where encoding of <DATA> is terminated by PACKET_FORMAT.
8108 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8111 Return the transferred status, error or OK (an
8112 'enum target_xfer_status' value). Save the number of addressable units
8113 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8115 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8116 exchange between gdb and the stub could look like (?? in place of the
8122 -> $M1000,3:eeeeffffeeee#??
8126 <- eeeeffffeeeedddd */
8128 static enum target_xfer_status
8129 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8130 const gdb_byte
*myaddr
, ULONGEST len_units
,
8131 int unit_size
, ULONGEST
*xfered_len_units
,
8132 char packet_format
, int use_length
)
8134 struct remote_state
*rs
= get_remote_state ();
8140 int payload_capacity_bytes
;
8141 int payload_length_bytes
;
8143 if (packet_format
!= 'X' && packet_format
!= 'M')
8144 internal_error (__FILE__
, __LINE__
,
8145 _("remote_write_bytes_aux: bad packet format"));
8148 return TARGET_XFER_EOF
;
8150 payload_capacity_bytes
= get_memory_write_packet_size ();
8152 /* The packet buffer will be large enough for the payload;
8153 get_memory_packet_size ensures this. */
8156 /* Compute the size of the actual payload by subtracting out the
8157 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8159 payload_capacity_bytes
-= strlen ("$,:#NN");
8161 /* The comma won't be used. */
8162 payload_capacity_bytes
+= 1;
8163 payload_capacity_bytes
-= strlen (header
);
8164 payload_capacity_bytes
-= hexnumlen (memaddr
);
8166 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8168 strcat (rs
->buf
, header
);
8169 p
= rs
->buf
+ strlen (header
);
8171 /* Compute a best guess of the number of bytes actually transfered. */
8172 if (packet_format
== 'X')
8174 /* Best guess at number of bytes that will fit. */
8175 todo_units
= std::min (len_units
,
8176 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8178 payload_capacity_bytes
-= hexnumlen (todo_units
);
8179 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8183 /* Number of bytes that will fit. */
8185 = std::min (len_units
,
8186 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8188 payload_capacity_bytes
-= hexnumlen (todo_units
);
8189 todo_units
= std::min (todo_units
,
8190 (payload_capacity_bytes
/ unit_size
) / 2);
8193 if (todo_units
<= 0)
8194 internal_error (__FILE__
, __LINE__
,
8195 _("minimum packet size too small to write data"));
8197 /* If we already need another packet, then try to align the end
8198 of this packet to a useful boundary. */
8199 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8200 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8202 /* Append "<memaddr>". */
8203 memaddr
= remote_address_masked (memaddr
);
8204 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8211 /* Append the length and retain its location and size. It may need to be
8212 adjusted once the packet body has been created. */
8214 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8222 /* Append the packet body. */
8223 if (packet_format
== 'X')
8225 /* Binary mode. Send target system values byte by byte, in
8226 increasing byte addresses. Only escape certain critical
8228 payload_length_bytes
=
8229 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8230 &units_written
, payload_capacity_bytes
);
8232 /* If not all TODO units fit, then we'll need another packet. Make
8233 a second try to keep the end of the packet aligned. Don't do
8234 this if the packet is tiny. */
8235 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8239 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8241 if (new_todo_units
!= units_written
)
8242 payload_length_bytes
=
8243 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8244 (gdb_byte
*) p
, &units_written
,
8245 payload_capacity_bytes
);
8248 p
+= payload_length_bytes
;
8249 if (use_length
&& units_written
< todo_units
)
8251 /* Escape chars have filled up the buffer prematurely,
8252 and we have actually sent fewer units than planned.
8253 Fix-up the length field of the packet. Use the same
8254 number of characters as before. */
8255 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8257 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8262 /* Normal mode: Send target system values byte by byte, in
8263 increasing byte addresses. Each byte is encoded as a two hex
8265 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8266 units_written
= todo_units
;
8269 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8270 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8272 if (rs
->buf
[0] == 'E')
8273 return TARGET_XFER_E_IO
;
8275 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8276 send fewer units than we'd planned. */
8277 *xfered_len_units
= (ULONGEST
) units_written
;
8278 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8281 /* Write memory data directly to the remote machine.
8282 This does not inform the data cache; the data cache uses this.
8283 MEMADDR is the address in the remote memory space.
8284 MYADDR is the address of the buffer in our space.
8285 LEN is the number of bytes.
8287 Return the transferred status, error or OK (an
8288 'enum target_xfer_status' value). Save the number of bytes
8289 transferred in *XFERED_LEN. Only transfer a single packet. */
8291 static enum target_xfer_status
8292 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ULONGEST len
,
8293 int unit_size
, ULONGEST
*xfered_len
)
8295 const char *packet_format
= NULL
;
8297 /* Check whether the target supports binary download. */
8298 check_binary_download (memaddr
);
8300 switch (packet_support (PACKET_X
))
8303 packet_format
= "X";
8305 case PACKET_DISABLE
:
8306 packet_format
= "M";
8308 case PACKET_SUPPORT_UNKNOWN
:
8309 internal_error (__FILE__
, __LINE__
,
8310 _("remote_write_bytes: bad internal state"));
8312 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8315 return remote_write_bytes_aux (packet_format
,
8316 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8317 packet_format
[0], 1);
8320 /* Read memory data directly from the remote machine.
8321 This does not use the data cache; the data cache uses this.
8322 MEMADDR is the address in the remote memory space.
8323 MYADDR is the address of the buffer in our space.
8324 LEN_UNITS is the number of addressable memory units to read..
8325 UNIT_SIZE is the length in bytes of an addressable unit.
8327 Return the transferred status, error or OK (an
8328 'enum target_xfer_status' value). Save the number of bytes
8329 transferred in *XFERED_LEN_UNITS.
8331 See the comment of remote_write_bytes_aux for an example of
8332 memory read/write exchange between gdb and the stub. */
8334 static enum target_xfer_status
8335 remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ULONGEST len_units
,
8336 int unit_size
, ULONGEST
*xfered_len_units
)
8338 struct remote_state
*rs
= get_remote_state ();
8339 int buf_size_bytes
; /* Max size of packet output buffer. */
8344 buf_size_bytes
= get_memory_read_packet_size ();
8345 /* The packet buffer will be large enough for the payload;
8346 get_memory_packet_size ensures this. */
8348 /* Number of units that will fit. */
8349 todo_units
= std::min (len_units
,
8350 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8352 /* Construct "m"<memaddr>","<len>". */
8353 memaddr
= remote_address_masked (memaddr
);
8356 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8358 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8361 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8362 if (rs
->buf
[0] == 'E'
8363 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8364 && rs
->buf
[3] == '\0')
8365 return TARGET_XFER_E_IO
;
8366 /* Reply describes memory byte by byte, each byte encoded as two hex
8369 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8370 /* Return what we have. Let higher layers handle partial reads. */
8371 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8372 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8375 /* Using the set of read-only target sections of remote, read live
8378 For interface/parameters/return description see target.h,
8381 static enum target_xfer_status
8382 remote_xfer_live_readonly_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
8383 ULONGEST memaddr
, ULONGEST len
,
8384 int unit_size
, ULONGEST
*xfered_len
)
8386 struct target_section
*secp
;
8387 struct target_section_table
*table
;
8389 secp
= target_section_by_addr (ops
, memaddr
);
8391 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
8392 secp
->the_bfd_section
)
8395 struct target_section
*p
;
8396 ULONGEST memend
= memaddr
+ len
;
8398 table
= target_get_section_table (ops
);
8400 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8402 if (memaddr
>= p
->addr
)
8404 if (memend
<= p
->endaddr
)
8406 /* Entire transfer is within this section. */
8407 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8410 else if (memaddr
>= p
->endaddr
)
8412 /* This section ends before the transfer starts. */
8417 /* This section overlaps the transfer. Just do half. */
8418 len
= p
->endaddr
- memaddr
;
8419 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8426 return TARGET_XFER_EOF
;
8429 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8430 first if the requested memory is unavailable in traceframe.
8431 Otherwise, fall back to remote_read_bytes_1. */
8433 static enum target_xfer_status
8434 remote_read_bytes (struct target_ops
*ops
, CORE_ADDR memaddr
,
8435 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8436 ULONGEST
*xfered_len
)
8439 return TARGET_XFER_EOF
;
8441 if (get_traceframe_number () != -1)
8443 std::vector
<mem_range
> available
;
8445 /* If we fail to get the set of available memory, then the
8446 target does not support querying traceframe info, and so we
8447 attempt reading from the traceframe anyway (assuming the
8448 target implements the old QTro packet then). */
8449 if (traceframe_available_memory (&available
, memaddr
, len
))
8451 if (available
.empty () || available
[0].start
!= memaddr
)
8453 enum target_xfer_status res
;
8455 /* Don't read into the traceframe's available
8457 if (!available
.empty ())
8459 LONGEST oldlen
= len
;
8461 len
= available
[0].start
- memaddr
;
8462 gdb_assert (len
<= oldlen
);
8465 /* This goes through the topmost target again. */
8466 res
= remote_xfer_live_readonly_partial (ops
, myaddr
, memaddr
,
8467 len
, unit_size
, xfered_len
);
8468 if (res
== TARGET_XFER_OK
)
8469 return TARGET_XFER_OK
;
8472 /* No use trying further, we know some memory starting
8473 at MEMADDR isn't available. */
8475 return (*xfered_len
!= 0) ?
8476 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8480 /* Don't try to read more than how much is available, in
8481 case the target implements the deprecated QTro packet to
8482 cater for older GDBs (the target's knowledge of read-only
8483 sections may be outdated by now). */
8484 len
= available
[0].length
;
8488 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8493 /* Sends a packet with content determined by the printf format string
8494 FORMAT and the remaining arguments, then gets the reply. Returns
8495 whether the packet was a success, a failure, or unknown. */
8497 static enum packet_result
remote_send_printf (const char *format
, ...)
8498 ATTRIBUTE_PRINTF (1, 2);
8500 static enum packet_result
8501 remote_send_printf (const char *format
, ...)
8503 struct remote_state
*rs
= get_remote_state ();
8504 int max_size
= get_remote_packet_size ();
8507 va_start (ap
, format
);
8510 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
8511 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8513 if (putpkt (rs
->buf
) < 0)
8514 error (_("Communication problem with target."));
8517 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8519 return packet_check_result (rs
->buf
);
8522 /* Flash writing can take quite some time. We'll set
8523 effectively infinite timeout for flash operations.
8524 In future, we'll need to decide on a better approach. */
8525 static const int remote_flash_timeout
= 1000;
8528 remote_flash_erase (struct target_ops
*ops
,
8529 ULONGEST address
, LONGEST length
)
8531 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
8532 enum packet_result ret
;
8533 scoped_restore restore_timeout
8534 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8536 ret
= remote_send_printf ("vFlashErase:%s,%s",
8537 phex (address
, addr_size
),
8541 case PACKET_UNKNOWN
:
8542 error (_("Remote target does not support flash erase"));
8544 error (_("Error erasing flash with vFlashErase packet"));
8550 static enum target_xfer_status
8551 remote_flash_write (struct target_ops
*ops
, ULONGEST address
,
8552 ULONGEST length
, ULONGEST
*xfered_len
,
8553 const gdb_byte
*data
)
8555 scoped_restore restore_timeout
8556 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8557 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
8562 remote_flash_done (struct target_ops
*ops
)
8566 scoped_restore restore_timeout
8567 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8569 ret
= remote_send_printf ("vFlashDone");
8573 case PACKET_UNKNOWN
:
8574 error (_("Remote target does not support vFlashDone"));
8576 error (_("Error finishing flash operation"));
8583 remote_files_info (struct target_ops
*ignore
)
8585 puts_filtered ("Debugging a target over a serial line.\n");
8588 /* Stuff for dealing with the packets which are part of this protocol.
8589 See comment at top of file for details. */
8591 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8592 error to higher layers. Called when a serial error is detected.
8593 The exception message is STRING, followed by a colon and a blank,
8594 the system error message for errno at function entry and final dot
8595 for output compatibility with throw_perror_with_name. */
8598 unpush_and_perror (const char *string
)
8600 int saved_errno
= errno
;
8602 remote_unpush_target ();
8603 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
8604 safe_strerror (saved_errno
));
8607 /* Read a single character from the remote end. The current quit
8608 handler is overridden to avoid quitting in the middle of packet
8609 sequence, as that would break communication with the remote server.
8610 See remote_serial_quit_handler for more detail. */
8613 readchar (int timeout
)
8616 struct remote_state
*rs
= get_remote_state ();
8619 scoped_restore restore_quit
8620 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8622 rs
->got_ctrlc_during_io
= 0;
8624 ch
= serial_readchar (rs
->remote_desc
, timeout
);
8626 if (rs
->got_ctrlc_during_io
)
8633 switch ((enum serial_rc
) ch
)
8636 remote_unpush_target ();
8637 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
8640 unpush_and_perror (_("Remote communication error. "
8641 "Target disconnected."));
8643 case SERIAL_TIMEOUT
:
8649 /* Wrapper for serial_write that closes the target and throws if
8650 writing fails. The current quit handler is overridden to avoid
8651 quitting in the middle of packet sequence, as that would break
8652 communication with the remote server. See
8653 remote_serial_quit_handler for more detail. */
8656 remote_serial_write (const char *str
, int len
)
8658 struct remote_state
*rs
= get_remote_state ();
8660 scoped_restore restore_quit
8661 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8663 rs
->got_ctrlc_during_io
= 0;
8665 if (serial_write (rs
->remote_desc
, str
, len
))
8667 unpush_and_perror (_("Remote communication error. "
8668 "Target disconnected."));
8671 if (rs
->got_ctrlc_during_io
)
8675 /* Send the command in *BUF to the remote machine, and read the reply
8676 into *BUF. Report an error if we get an error reply. Resize
8677 *BUF using xrealloc if necessary to hold the result, and update
8681 remote_send (char **buf
,
8685 getpkt (buf
, sizeof_buf
, 0);
8687 if ((*buf
)[0] == 'E')
8688 error (_("Remote failure reply: %s"), *buf
);
8691 /* Return a string representing an escaped version of BUF, of len N.
8692 E.g. \n is converted to \\n, \t to \\t, etc. */
8695 escape_buffer (const char *buf
, int n
)
8699 stb
.putstrn (buf
, n
, '\\');
8700 return std::move (stb
.string ());
8703 /* Display a null-terminated packet on stdout, for debugging, using C
8707 print_packet (const char *buf
)
8709 puts_filtered ("\"");
8710 fputstr_filtered (buf
, '"', gdb_stdout
);
8711 puts_filtered ("\"");
8715 putpkt (const char *buf
)
8717 return putpkt_binary (buf
, strlen (buf
));
8720 /* Send a packet to the remote machine, with error checking. The data
8721 of the packet is in BUF. The string in BUF can be at most
8722 get_remote_packet_size () - 5 to account for the $, # and checksum,
8723 and for a possible /0 if we are debugging (remote_debug) and want
8724 to print the sent packet as a string. */
8727 putpkt_binary (const char *buf
, int cnt
)
8729 struct remote_state
*rs
= get_remote_state ();
8731 unsigned char csum
= 0;
8732 gdb::def_vector
<char> data (cnt
+ 6);
8733 char *buf2
= data
.data ();
8739 /* Catch cases like trying to read memory or listing threads while
8740 we're waiting for a stop reply. The remote server wouldn't be
8741 ready to handle this request, so we'd hang and timeout. We don't
8742 have to worry about this in synchronous mode, because in that
8743 case it's not possible to issue a command while the target is
8744 running. This is not a problem in non-stop mode, because in that
8745 case, the stub is always ready to process serial input. */
8746 if (!target_is_non_stop_p ()
8747 && target_is_async_p ()
8748 && rs
->waiting_for_stop_reply
)
8750 error (_("Cannot execute this command while the target is running.\n"
8751 "Use the \"interrupt\" command to stop the target\n"
8752 "and then try again."));
8755 /* We're sending out a new packet. Make sure we don't look at a
8756 stale cached response. */
8757 rs
->cached_wait_status
= 0;
8759 /* Copy the packet into buffer BUF2, encapsulating it
8760 and giving it a checksum. */
8765 for (i
= 0; i
< cnt
; i
++)
8771 *p
++ = tohex ((csum
>> 4) & 0xf);
8772 *p
++ = tohex (csum
& 0xf);
8774 /* Send it over and over until we get a positive ack. */
8778 int started_error_output
= 0;
8784 int len
= (int) (p
- buf2
);
8787 = escape_buffer (buf2
, std::min (len
, REMOTE_DEBUG_MAX_CHAR
));
8789 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
8791 if (str
.length () > REMOTE_DEBUG_MAX_CHAR
)
8793 fprintf_unfiltered (gdb_stdlog
, "[%zu bytes omitted]",
8794 str
.length () - REMOTE_DEBUG_MAX_CHAR
);
8797 fprintf_unfiltered (gdb_stdlog
, "...");
8799 gdb_flush (gdb_stdlog
);
8801 remote_serial_write (buf2
, p
- buf2
);
8803 /* If this is a no acks version of the remote protocol, send the
8804 packet and move on. */
8808 /* Read until either a timeout occurs (-2) or '+' is read.
8809 Handle any notification that arrives in the mean time. */
8812 ch
= readchar (remote_timeout
);
8820 case SERIAL_TIMEOUT
:
8823 if (started_error_output
)
8825 putchar_unfiltered ('\n');
8826 started_error_output
= 0;
8835 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
8839 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
8841 case SERIAL_TIMEOUT
:
8845 break; /* Retransmit buffer. */
8849 fprintf_unfiltered (gdb_stdlog
,
8850 "Packet instead of Ack, ignoring it\n");
8851 /* It's probably an old response sent because an ACK
8852 was lost. Gobble up the packet and ack it so it
8853 doesn't get retransmitted when we resend this
8856 remote_serial_write ("+", 1);
8857 continue; /* Now, go look for +. */
8864 /* If we got a notification, handle it, and go back to looking
8866 /* We've found the start of a notification. Now
8867 collect the data. */
8868 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
8873 std::string str
= escape_buffer (rs
->buf
, val
);
8875 fprintf_unfiltered (gdb_stdlog
,
8876 " Notification received: %s\n",
8879 handle_notification (rs
->notif_state
, rs
->buf
);
8880 /* We're in sync now, rewait for the ack. */
8887 if (!started_error_output
)
8889 started_error_output
= 1;
8890 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8892 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8893 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
8902 if (!started_error_output
)
8904 started_error_output
= 1;
8905 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8907 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8911 break; /* Here to retransmit. */
8915 /* This is wrong. If doing a long backtrace, the user should be
8916 able to get out next time we call QUIT, without anything as
8917 violent as interrupt_query. If we want to provide a way out of
8918 here without getting to the next QUIT, it should be based on
8919 hitting ^C twice as in remote_wait. */
8931 /* Come here after finding the start of a frame when we expected an
8932 ack. Do our best to discard the rest of this packet. */
8941 c
= readchar (remote_timeout
);
8944 case SERIAL_TIMEOUT
:
8945 /* Nothing we can do. */
8948 /* Discard the two bytes of checksum and stop. */
8949 c
= readchar (remote_timeout
);
8951 c
= readchar (remote_timeout
);
8954 case '*': /* Run length encoding. */
8955 /* Discard the repeat count. */
8956 c
= readchar (remote_timeout
);
8961 /* A regular character. */
8967 /* Come here after finding the start of the frame. Collect the rest
8968 into *BUF, verifying the checksum, length, and handling run-length
8969 compression. NUL terminate the buffer. If there is not enough room,
8970 expand *BUF using xrealloc.
8972 Returns -1 on error, number of characters in buffer (ignoring the
8973 trailing NULL) on success. (could be extended to return one of the
8974 SERIAL status indications). */
8977 read_frame (char **buf_p
,
8984 struct remote_state
*rs
= get_remote_state ();
8991 c
= readchar (remote_timeout
);
8994 case SERIAL_TIMEOUT
:
8996 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
9000 fputs_filtered ("Saw new packet start in middle of old one\n",
9002 return -1; /* Start a new packet, count retries. */
9005 unsigned char pktcsum
;
9011 check_0
= readchar (remote_timeout
);
9013 check_1
= readchar (remote_timeout
);
9015 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9018 fputs_filtered ("Timeout in checksum, retrying\n",
9022 else if (check_0
< 0 || check_1
< 0)
9025 fputs_filtered ("Communication error in checksum\n",
9030 /* Don't recompute the checksum; with no ack packets we
9031 don't have any way to indicate a packet retransmission
9036 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9037 if (csum
== pktcsum
)
9042 std::string str
= escape_buffer (buf
, bc
);
9044 fprintf_unfiltered (gdb_stdlog
,
9045 "Bad checksum, sentsum=0x%x, "
9046 "csum=0x%x, buf=%s\n",
9047 pktcsum
, csum
, str
.c_str ());
9049 /* Number of characters in buffer ignoring trailing
9053 case '*': /* Run length encoding. */
9058 c
= readchar (remote_timeout
);
9060 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9062 /* The character before ``*'' is repeated. */
9064 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9066 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
9068 /* Make some more room in the buffer. */
9069 *sizeof_buf
+= repeat
;
9070 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9074 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9080 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9084 if (bc
>= *sizeof_buf
- 1)
9086 /* Make some more room in the buffer. */
9088 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9099 /* Read a packet from the remote machine, with error checking, and
9100 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9101 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9102 rather than timing out; this is used (in synchronous mode) to wait
9103 for a target that is is executing user code to stop. */
9104 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9105 don't have to change all the calls to getpkt to deal with the
9106 return value, because at the moment I don't know what the right
9107 thing to do it for those. */
9113 getpkt_sane (buf
, sizeof_buf
, forever
);
9117 /* Read a packet from the remote machine, with error checking, and
9118 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9119 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9120 rather than timing out; this is used (in synchronous mode) to wait
9121 for a target that is is executing user code to stop. If FOREVER ==
9122 0, this function is allowed to time out gracefully and return an
9123 indication of this to the caller. Otherwise return the number of
9124 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9125 enough reason to return to the caller. *IS_NOTIF is an output
9126 boolean that indicates whether *BUF holds a notification or not
9127 (a regular packet). */
9130 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
9131 int expecting_notif
, int *is_notif
)
9133 struct remote_state
*rs
= get_remote_state ();
9139 /* We're reading a new response. Make sure we don't look at a
9140 previously cached response. */
9141 rs
->cached_wait_status
= 0;
9143 strcpy (*buf
, "timeout");
9146 timeout
= watchdog
> 0 ? watchdog
: -1;
9147 else if (expecting_notif
)
9148 timeout
= 0; /* There should already be a char in the buffer. If
9151 timeout
= remote_timeout
;
9155 /* Process any number of notifications, and then return when
9159 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9161 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9163 /* This can loop forever if the remote side sends us
9164 characters continuously, but if it pauses, we'll get
9165 SERIAL_TIMEOUT from readchar because of timeout. Then
9166 we'll count that as a retry.
9168 Note that even when forever is set, we will only wait
9169 forever prior to the start of a packet. After that, we
9170 expect characters to arrive at a brisk pace. They should
9171 show up within remote_timeout intervals. */
9173 c
= readchar (timeout
);
9174 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9176 if (c
== SERIAL_TIMEOUT
)
9178 if (expecting_notif
)
9179 return -1; /* Don't complain, it's normal to not get
9180 anything in this case. */
9182 if (forever
) /* Watchdog went off? Kill the target. */
9184 remote_unpush_target ();
9185 throw_error (TARGET_CLOSE_ERROR
,
9186 _("Watchdog timeout has expired. "
9187 "Target detached."));
9190 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9194 /* We've found the start of a packet or notification.
9195 Now collect the data. */
9196 val
= read_frame (buf
, sizeof_buf
);
9201 remote_serial_write ("-", 1);
9204 if (tries
> MAX_TRIES
)
9206 /* We have tried hard enough, and just can't receive the
9207 packet/notification. Give up. */
9208 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9210 /* Skip the ack char if we're in no-ack mode. */
9211 if (!rs
->noack_mode
)
9212 remote_serial_write ("+", 1);
9216 /* If we got an ordinary packet, return that to our caller. */
9222 = escape_buffer (*buf
,
9223 std::min (val
, REMOTE_DEBUG_MAX_CHAR
));
9225 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9228 if (str
.length () > REMOTE_DEBUG_MAX_CHAR
)
9230 fprintf_unfiltered (gdb_stdlog
, "[%zu bytes omitted]",
9231 str
.length () - REMOTE_DEBUG_MAX_CHAR
);
9234 fprintf_unfiltered (gdb_stdlog
, "\n");
9237 /* Skip the ack char if we're in no-ack mode. */
9238 if (!rs
->noack_mode
)
9239 remote_serial_write ("+", 1);
9240 if (is_notif
!= NULL
)
9245 /* If we got a notification, handle it, and go back to looking
9249 gdb_assert (c
== '%');
9253 std::string str
= escape_buffer (*buf
, val
);
9255 fprintf_unfiltered (gdb_stdlog
,
9256 " Notification received: %s\n",
9259 if (is_notif
!= NULL
)
9262 handle_notification (rs
->notif_state
, *buf
);
9264 /* Notifications require no acknowledgement. */
9266 if (expecting_notif
)
9273 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
9275 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0, NULL
);
9279 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
9282 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1,
9286 /* Check whether EVENT is a fork event for the process specified
9287 by the pid passed in DATA, and if it is, kill the fork child. */
9290 kill_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
9291 QUEUE_ITER (stop_reply_p
) *iter
,
9295 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
9296 int parent_pid
= *(int *) param
->input
;
9298 if (is_pending_fork_parent (&event
->ws
, parent_pid
, event
->ptid
))
9300 struct remote_state
*rs
= get_remote_state ();
9301 int child_pid
= ptid_get_pid (event
->ws
.value
.related_pid
);
9304 res
= remote_vkill (child_pid
, rs
);
9306 error (_("Can't kill fork child process %d"), child_pid
);
9312 /* Kill any new fork children of process PID that haven't been
9313 processed by follow_fork. */
9316 kill_new_fork_children (int pid
, struct remote_state
*rs
)
9318 struct thread_info
*thread
;
9319 struct notif_client
*notif
= ¬if_client_stop
;
9320 struct queue_iter_param param
;
9322 /* Kill the fork child threads of any threads in process PID
9323 that are stopped at a fork event. */
9324 ALL_NON_EXITED_THREADS (thread
)
9326 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9328 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9330 struct remote_state
*rs
= get_remote_state ();
9331 int child_pid
= ptid_get_pid (ws
->value
.related_pid
);
9334 res
= remote_vkill (child_pid
, rs
);
9336 error (_("Can't kill fork child process %d"), child_pid
);
9340 /* Check for any pending fork events (not reported or processed yet)
9341 in process PID and kill those fork child threads as well. */
9342 remote_notif_get_pending_events (notif
);
9344 param
.output
= NULL
;
9345 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
9346 kill_child_of_pending_fork
, ¶m
);
9350 /* Target hook to kill the current inferior. */
9353 remote_kill (struct target_ops
*ops
)
9356 int pid
= ptid_get_pid (inferior_ptid
);
9357 struct remote_state
*rs
= get_remote_state ();
9359 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9361 /* If we're stopped while forking and we haven't followed yet,
9362 kill the child task. We need to do this before killing the
9363 parent task because if this is a vfork then the parent will
9365 kill_new_fork_children (pid
, rs
);
9367 res
= remote_vkill (pid
, rs
);
9370 target_mourn_inferior (inferior_ptid
);
9375 /* If we are in 'target remote' mode and we are killing the only
9376 inferior, then we will tell gdbserver to exit and unpush the
9378 if (res
== -1 && !remote_multi_process_p (rs
)
9379 && number_of_live_inferiors () == 1)
9383 /* We've killed the remote end, we get to mourn it. If we are
9384 not in extended mode, mourning the inferior also unpushes
9385 remote_ops from the target stack, which closes the remote
9387 target_mourn_inferior (inferior_ptid
);
9392 error (_("Can't kill process"));
9395 /* Send a kill request to the target using the 'vKill' packet. */
9398 remote_vkill (int pid
, struct remote_state
*rs
)
9400 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9403 /* Tell the remote target to detach. */
9404 xsnprintf (rs
->buf
, get_remote_packet_size (), "vKill;%x", pid
);
9406 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9408 switch (packet_ok (rs
->buf
,
9409 &remote_protocol_packets
[PACKET_vKill
]))
9415 case PACKET_UNKNOWN
:
9418 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9422 /* Send a kill request to the target using the 'k' packet. */
9425 remote_kill_k (void)
9427 /* Catch errors so the user can quit from gdb even when we
9428 aren't on speaking terms with the remote system. */
9433 CATCH (ex
, RETURN_MASK_ERROR
)
9435 if (ex
.error
== TARGET_CLOSE_ERROR
)
9437 /* If we got an (EOF) error that caused the target
9438 to go away, then we're done, that's what we wanted.
9439 "k" is susceptible to cause a premature EOF, given
9440 that the remote server isn't actually required to
9441 reply to "k", and it can happen that it doesn't
9442 even get to reply ACK to the "k". */
9446 /* Otherwise, something went wrong. We didn't actually kill
9447 the target. Just propagate the exception, and let the
9448 user or higher layers decide what to do. */
9449 throw_exception (ex
);
9455 remote_mourn (struct target_ops
*target
)
9457 struct remote_state
*rs
= get_remote_state ();
9459 /* In 'target remote' mode with one inferior, we close the connection. */
9460 if (!rs
->extended
&& number_of_live_inferiors () <= 1)
9462 unpush_target (target
);
9464 /* remote_close takes care of doing most of the clean up. */
9465 generic_mourn_inferior ();
9469 /* In case we got here due to an error, but we're going to stay
9471 rs
->waiting_for_stop_reply
= 0;
9473 /* If the current general thread belonged to the process we just
9474 detached from or has exited, the remote side current general
9475 thread becomes undefined. Considering a case like this:
9477 - We just got here due to a detach.
9478 - The process that we're detaching from happens to immediately
9479 report a global breakpoint being hit in non-stop mode, in the
9480 same thread we had selected before.
9481 - GDB attaches to this process again.
9482 - This event happens to be the next event we handle.
9484 GDB would consider that the current general thread didn't need to
9485 be set on the stub side (with Hg), since for all it knew,
9486 GENERAL_THREAD hadn't changed.
9488 Notice that although in all-stop mode, the remote server always
9489 sets the current thread to the thread reporting the stop event,
9490 that doesn't happen in non-stop mode; in non-stop, the stub *must
9491 not* change the current thread when reporting a breakpoint hit,
9492 due to the decoupling of event reporting and event handling.
9494 To keep things simple, we always invalidate our notion of the
9496 record_currthread (rs
, minus_one_ptid
);
9498 /* Call common code to mark the inferior as not running. */
9499 generic_mourn_inferior ();
9501 if (!have_inferiors ())
9503 if (!remote_multi_process_p (rs
))
9505 /* Check whether the target is running now - some remote stubs
9506 automatically restart after kill. */
9508 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9510 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
9512 /* Assume that the target has been restarted. Set
9513 inferior_ptid so that bits of core GDB realizes
9514 there's something here, e.g., so that the user can
9515 say "kill" again. */
9516 inferior_ptid
= magic_null_ptid
;
9523 extended_remote_supports_disable_randomization (struct target_ops
*self
)
9525 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9529 extended_remote_disable_randomization (int val
)
9531 struct remote_state
*rs
= get_remote_state ();
9534 xsnprintf (rs
->buf
, get_remote_packet_size (), "QDisableRandomization:%x",
9537 reply
= remote_get_noisy_reply ();
9539 error (_("Target does not support QDisableRandomization."));
9540 if (strcmp (reply
, "OK") != 0)
9541 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
9545 extended_remote_run (const std::string
&args
)
9547 struct remote_state
*rs
= get_remote_state ();
9549 const char *remote_exec_file
= get_remote_exec_file ();
9551 /* If the user has disabled vRun support, or we have detected that
9552 support is not available, do not try it. */
9553 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
9556 strcpy (rs
->buf
, "vRun;");
9557 len
= strlen (rs
->buf
);
9559 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
9560 error (_("Remote file name too long for run packet"));
9561 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
,
9562 strlen (remote_exec_file
));
9568 gdb_argv
argv (args
.c_str ());
9569 for (i
= 0; argv
[i
] != NULL
; i
++)
9571 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
9572 error (_("Argument list too long for run packet"));
9573 rs
->buf
[len
++] = ';';
9574 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
,
9579 rs
->buf
[len
++] = '\0';
9582 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9584 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
9587 /* We have a wait response. All is well. */
9589 case PACKET_UNKNOWN
:
9592 if (remote_exec_file
[0] == '\0')
9593 error (_("Running the default executable on the remote target failed; "
9594 "try \"set remote exec-file\"?"));
9596 error (_("Running \"%s\" on the remote target failed"),
9599 gdb_assert_not_reached (_("bad switch"));
9603 /* Helper function to send set/unset environment packets. ACTION is
9604 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9605 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9609 send_environment_packet (struct remote_state
*rs
,
9614 /* Convert the environment variable to an hex string, which
9615 is the best format to be transmitted over the wire. */
9616 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
9619 xsnprintf (rs
->buf
, get_remote_packet_size (),
9620 "%s:%s", packet
, encoded_value
.c_str ());
9623 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9624 if (strcmp (rs
->buf
, "OK") != 0)
9625 warning (_("Unable to %s environment variable '%s' on remote."),
9629 /* Helper function to handle the QEnvironment* packets. */
9632 extended_remote_environment_support (struct remote_state
*rs
)
9634 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
9636 putpkt ("QEnvironmentReset");
9637 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9638 if (strcmp (rs
->buf
, "OK") != 0)
9639 warning (_("Unable to reset environment on remote."));
9642 gdb_environ
*e
= ¤t_inferior ()->environment
;
9644 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
9645 for (const std::string
&el
: e
->user_set_env ())
9646 send_environment_packet (rs
, "set", "QEnvironmentHexEncoded",
9649 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
9650 for (const std::string
&el
: e
->user_unset_env ())
9651 send_environment_packet (rs
, "unset", "QEnvironmentUnset", el
.c_str ());
9654 /* Helper function to set the current working directory for the
9655 inferior in the remote target. */
9658 extended_remote_set_inferior_cwd (struct remote_state
*rs
)
9660 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
9662 const char *inferior_cwd
= get_inferior_cwd ();
9664 if (inferior_cwd
!= NULL
)
9666 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
9667 strlen (inferior_cwd
));
9669 xsnprintf (rs
->buf
, get_remote_packet_size (),
9670 "QSetWorkingDir:%s", hexpath
.c_str ());
9674 /* An empty inferior_cwd means that the user wants us to
9675 reset the remote server's inferior's cwd. */
9676 xsnprintf (rs
->buf
, get_remote_packet_size (),
9681 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9682 if (packet_ok (rs
->buf
,
9683 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
9686 Remote replied unexpectedly while setting the inferior's working\n\
9693 /* In the extended protocol we want to be able to do things like
9694 "run" and have them basically work as expected. So we need
9695 a special create_inferior function. We support changing the
9696 executable file and the command line arguments, but not the
9700 extended_remote_create_inferior (struct target_ops
*ops
,
9701 const char *exec_file
,
9702 const std::string
&args
,
9703 char **env
, int from_tty
)
9707 struct remote_state
*rs
= get_remote_state ();
9708 const char *remote_exec_file
= get_remote_exec_file ();
9710 /* If running asynchronously, register the target file descriptor
9711 with the event loop. */
9712 if (target_can_async_p ())
9715 /* Disable address space randomization if requested (and supported). */
9716 if (extended_remote_supports_disable_randomization (ops
))
9717 extended_remote_disable_randomization (disable_randomization
);
9719 /* If startup-with-shell is on, we inform gdbserver to start the
9720 remote inferior using a shell. */
9721 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
9723 xsnprintf (rs
->buf
, get_remote_packet_size (),
9724 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
9726 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9727 if (strcmp (rs
->buf
, "OK") != 0)
9729 Remote replied unexpectedly while setting startup-with-shell: %s"),
9733 extended_remote_environment_support (rs
);
9735 extended_remote_set_inferior_cwd (rs
);
9737 /* Now restart the remote server. */
9738 run_worked
= extended_remote_run (args
) != -1;
9741 /* vRun was not supported. Fail if we need it to do what the
9743 if (remote_exec_file
[0])
9744 error (_("Remote target does not support \"set remote exec-file\""));
9746 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9748 /* Fall back to "R". */
9749 extended_remote_restart ();
9752 if (!have_inferiors ())
9754 /* Clean up from the last time we ran, before we mark the target
9755 running again. This will mark breakpoints uninserted, and
9756 get_offsets may insert breakpoints. */
9757 init_thread_list ();
9758 init_wait_for_inferior ();
9761 /* vRun's success return is a stop reply. */
9762 stop_reply
= run_worked
? rs
->buf
: NULL
;
9763 add_current_inferior_and_thread (stop_reply
);
9765 /* Get updated offsets, if the stub uses qOffsets. */
9770 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9771 the list of conditions (in agent expression bytecode format), if any, the
9772 target needs to evaluate. The output is placed into the packet buffer
9773 started from BUF and ended at BUF_END. */
9776 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
9777 struct bp_target_info
*bp_tgt
, char *buf
,
9780 if (bp_tgt
->conditions
.empty ())
9783 buf
+= strlen (buf
);
9784 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
9787 /* Send conditions to the target. */
9788 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
9790 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
9791 buf
+= strlen (buf
);
9792 for (int i
= 0; i
< aexpr
->len
; ++i
)
9793 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9800 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
9801 struct bp_target_info
*bp_tgt
, char *buf
)
9803 if (bp_tgt
->tcommands
.empty ())
9806 buf
+= strlen (buf
);
9808 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
9809 buf
+= strlen (buf
);
9811 /* Concatenate all the agent expressions that are commands into the
9813 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
9815 sprintf (buf
, "X%x,", aexpr
->len
);
9816 buf
+= strlen (buf
);
9817 for (int i
= 0; i
< aexpr
->len
; ++i
)
9818 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9823 /* Insert a breakpoint. On targets that have software breakpoint
9824 support, we ask the remote target to do the work; on targets
9825 which don't, we insert a traditional memory breakpoint. */
9828 remote_insert_breakpoint (struct target_ops
*ops
,
9829 struct gdbarch
*gdbarch
,
9830 struct bp_target_info
*bp_tgt
)
9832 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9833 If it succeeds, then set the support to PACKET_ENABLE. If it
9834 fails, and the user has explicitly requested the Z support then
9835 report an error, otherwise, mark it disabled and go on. */
9837 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9839 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
9840 struct remote_state
*rs
;
9844 /* Make sure the remote is pointing at the right process, if
9846 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9847 set_general_process ();
9849 rs
= get_remote_state ();
9851 endbuf
= rs
->buf
+ get_remote_packet_size ();
9856 addr
= (ULONGEST
) remote_address_masked (addr
);
9857 p
+= hexnumstr (p
, addr
);
9858 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9860 if (remote_supports_cond_breakpoints (ops
))
9861 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
9863 if (remote_can_run_breakpoint_commands (ops
))
9864 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
9867 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9869 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
9875 case PACKET_UNKNOWN
:
9880 /* If this breakpoint has target-side commands but this stub doesn't
9881 support Z0 packets, throw error. */
9882 if (!bp_tgt
->tcommands
.empty ())
9883 throw_error (NOT_SUPPORTED_ERROR
, _("\
9884 Target doesn't support breakpoints that have target side commands."));
9886 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
9890 remote_remove_breakpoint (struct target_ops
*ops
,
9891 struct gdbarch
*gdbarch
,
9892 struct bp_target_info
*bp_tgt
,
9893 enum remove_bp_reason reason
)
9895 CORE_ADDR addr
= bp_tgt
->placed_address
;
9896 struct remote_state
*rs
= get_remote_state ();
9898 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9901 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9903 /* Make sure the remote is pointing at the right process, if
9905 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9906 set_general_process ();
9912 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
9913 p
+= hexnumstr (p
, addr
);
9914 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9917 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9919 return (rs
->buf
[0] == 'E');
9922 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
, reason
);
9925 static enum Z_packet_type
9926 watchpoint_to_Z_packet (int type
)
9931 return Z_PACKET_WRITE_WP
;
9934 return Z_PACKET_READ_WP
;
9937 return Z_PACKET_ACCESS_WP
;
9940 internal_error (__FILE__
, __LINE__
,
9941 _("hw_bp_to_z: bad watchpoint type %d"), type
);
9946 remote_insert_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9947 enum target_hw_bp_type type
, struct expression
*cond
)
9949 struct remote_state
*rs
= get_remote_state ();
9950 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9952 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9954 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9957 /* Make sure the remote is pointing at the right process, if
9959 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9960 set_general_process ();
9962 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "Z%x,", packet
);
9963 p
= strchr (rs
->buf
, '\0');
9964 addr
= remote_address_masked (addr
);
9965 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9966 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9969 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9971 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9975 case PACKET_UNKNOWN
:
9980 internal_error (__FILE__
, __LINE__
,
9981 _("remote_insert_watchpoint: reached end of function"));
9985 remote_watchpoint_addr_within_range (struct target_ops
*target
, CORE_ADDR addr
,
9986 CORE_ADDR start
, int length
)
9988 CORE_ADDR diff
= remote_address_masked (addr
- start
);
9990 return diff
< length
;
9995 remote_remove_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9996 enum target_hw_bp_type type
, struct expression
*cond
)
9998 struct remote_state
*rs
= get_remote_state ();
9999 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10001 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10003 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10006 /* Make sure the remote is pointing at the right process, if
10008 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10009 set_general_process ();
10011 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "z%x,", packet
);
10012 p
= strchr (rs
->buf
, '\0');
10013 addr
= remote_address_masked (addr
);
10014 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10015 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10017 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10019 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10022 case PACKET_UNKNOWN
:
10027 internal_error (__FILE__
, __LINE__
,
10028 _("remote_remove_watchpoint: reached end of function"));
10032 int remote_hw_watchpoint_limit
= -1;
10033 int remote_hw_watchpoint_length_limit
= -1;
10034 int remote_hw_breakpoint_limit
= -1;
10037 remote_region_ok_for_hw_watchpoint (struct target_ops
*self
,
10038 CORE_ADDR addr
, int len
)
10040 if (remote_hw_watchpoint_length_limit
== 0)
10042 else if (remote_hw_watchpoint_length_limit
< 0)
10044 else if (len
<= remote_hw_watchpoint_length_limit
)
10051 remote_check_watch_resources (struct target_ops
*self
,
10052 enum bptype type
, int cnt
, int ot
)
10054 if (type
== bp_hardware_breakpoint
)
10056 if (remote_hw_breakpoint_limit
== 0)
10058 else if (remote_hw_breakpoint_limit
< 0)
10060 else if (cnt
<= remote_hw_breakpoint_limit
)
10065 if (remote_hw_watchpoint_limit
== 0)
10067 else if (remote_hw_watchpoint_limit
< 0)
10071 else if (cnt
<= remote_hw_watchpoint_limit
)
10077 /* The to_stopped_by_sw_breakpoint method of target remote. */
10080 remote_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10082 struct thread_info
*thread
= inferior_thread ();
10084 return (thread
->priv
!= NULL
10085 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_SW_BREAKPOINT
);
10088 /* The to_supports_stopped_by_sw_breakpoint method of target
10092 remote_supports_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10094 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10097 /* The to_stopped_by_hw_breakpoint method of target remote. */
10100 remote_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10102 struct thread_info
*thread
= inferior_thread ();
10104 return (thread
->priv
!= NULL
10105 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_HW_BREAKPOINT
);
10108 /* The to_supports_stopped_by_hw_breakpoint method of target
10112 remote_supports_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10114 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10118 remote_stopped_by_watchpoint (struct target_ops
*ops
)
10120 struct thread_info
*thread
= inferior_thread ();
10122 return (thread
->priv
!= NULL
10123 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_WATCHPOINT
);
10127 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
10129 struct thread_info
*thread
= inferior_thread ();
10131 if (thread
->priv
!= NULL
10132 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_WATCHPOINT
)
10134 *addr_p
= thread
->priv
->watch_data_address
;
10143 remote_insert_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10144 struct bp_target_info
*bp_tgt
)
10146 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10147 struct remote_state
*rs
;
10151 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10154 /* Make sure the remote is pointing at the right process, if
10156 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10157 set_general_process ();
10159 rs
= get_remote_state ();
10161 endbuf
= rs
->buf
+ get_remote_packet_size ();
10167 addr
= remote_address_masked (addr
);
10168 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10169 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10171 if (remote_supports_cond_breakpoints (self
))
10172 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10174 if (remote_can_run_breakpoint_commands (self
))
10175 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10178 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10180 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10183 if (rs
->buf
[1] == '.')
10185 message
= strchr (rs
->buf
+ 2, '.');
10187 error (_("Remote failure reply: %s"), message
+ 1);
10190 case PACKET_UNKNOWN
:
10195 internal_error (__FILE__
, __LINE__
,
10196 _("remote_insert_hw_breakpoint: reached end of function"));
10201 remote_remove_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10202 struct bp_target_info
*bp_tgt
)
10205 struct remote_state
*rs
= get_remote_state ();
10207 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10209 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10212 /* Make sure the remote is pointing at the right process, if
10214 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10215 set_general_process ();
10221 addr
= remote_address_masked (bp_tgt
->placed_address
);
10222 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10223 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10226 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10228 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10231 case PACKET_UNKNOWN
:
10236 internal_error (__FILE__
, __LINE__
,
10237 _("remote_remove_hw_breakpoint: reached end of function"));
10240 /* Verify memory using the "qCRC:" request. */
10243 remote_verify_memory (struct target_ops
*ops
,
10244 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10246 struct remote_state
*rs
= get_remote_state ();
10247 unsigned long host_crc
, target_crc
;
10250 /* It doesn't make sense to use qCRC if the remote target is
10251 connected but not running. */
10252 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10254 enum packet_result result
;
10256 /* Make sure the remote is pointing at the right process. */
10257 set_general_process ();
10259 /* FIXME: assumes lma can fit into long. */
10260 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
10261 (long) lma
, (long) size
);
10264 /* Be clever; compute the host_crc before waiting for target
10266 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10268 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10270 result
= packet_ok (rs
->buf
,
10271 &remote_protocol_packets
[PACKET_qCRC
]);
10272 if (result
== PACKET_ERROR
)
10274 else if (result
== PACKET_OK
)
10276 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10277 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10279 return (host_crc
== target_crc
);
10283 return simple_verify_memory (ops
, data
, lma
, size
);
10286 /* compare-sections command
10288 With no arguments, compares each loadable section in the exec bfd
10289 with the same memory range on the target, and reports mismatches.
10290 Useful for verifying the image on the target against the exec file. */
10293 compare_sections_command (const char *args
, int from_tty
)
10296 gdb_byte
*sectdata
;
10297 const char *sectname
;
10298 bfd_size_type size
;
10301 int mismatched
= 0;
10306 error (_("command cannot be used without an exec file"));
10308 /* Make sure the remote is pointing at the right process. */
10309 set_general_process ();
10311 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10317 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10319 if (!(s
->flags
& SEC_LOAD
))
10320 continue; /* Skip non-loadable section. */
10322 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10323 continue; /* Skip writeable sections */
10325 size
= bfd_get_section_size (s
);
10327 continue; /* Skip zero-length section. */
10329 sectname
= bfd_get_section_name (exec_bfd
, s
);
10330 if (args
&& strcmp (args
, sectname
) != 0)
10331 continue; /* Not the section selected by user. */
10333 matched
= 1; /* Do this section. */
10336 gdb::byte_vector
sectdata (size
);
10337 bfd_get_section_contents (exec_bfd
, s
, sectdata
.data (), 0, size
);
10339 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10342 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10343 paddress (target_gdbarch (), lma
),
10344 paddress (target_gdbarch (), lma
+ size
));
10346 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10347 paddress (target_gdbarch (), lma
),
10348 paddress (target_gdbarch (), lma
+ size
));
10350 printf_filtered ("matched.\n");
10353 printf_filtered ("MIS-MATCHED!\n");
10357 if (mismatched
> 0)
10358 warning (_("One or more sections of the target image does not match\n\
10359 the loaded file\n"));
10360 if (args
&& !matched
)
10361 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10364 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10365 into remote target. The number of bytes written to the remote
10366 target is returned, or -1 for error. */
10368 static enum target_xfer_status
10369 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
10370 const char *annex
, const gdb_byte
*writebuf
,
10371 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
,
10372 struct packet_config
*packet
)
10376 struct remote_state
*rs
= get_remote_state ();
10377 int max_size
= get_memory_write_packet_size ();
10379 if (packet
->support
== PACKET_DISABLE
)
10380 return TARGET_XFER_E_IO
;
10382 /* Insert header. */
10383 i
= snprintf (rs
->buf
, max_size
,
10384 "qXfer:%s:write:%s:%s:",
10385 object_name
, annex
? annex
: "",
10386 phex_nz (offset
, sizeof offset
));
10387 max_size
-= (i
+ 1);
10389 /* Escape as much data as fits into rs->buf. */
10390 buf_len
= remote_escape_output
10391 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
+ i
, &max_size
, max_size
);
10393 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
10394 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10395 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10396 return TARGET_XFER_E_IO
;
10398 unpack_varlen_hex (rs
->buf
, &n
);
10401 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10404 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10405 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10406 number of bytes read is returned, or 0 for EOF, or -1 for error.
10407 The number of bytes read may be less than LEN without indicating an
10408 EOF. PACKET is checked and updated to indicate whether the remote
10409 target supports this object. */
10411 static enum target_xfer_status
10412 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
10414 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
10415 ULONGEST
*xfered_len
,
10416 struct packet_config
*packet
)
10418 struct remote_state
*rs
= get_remote_state ();
10419 LONGEST i
, n
, packet_len
;
10421 if (packet
->support
== PACKET_DISABLE
)
10422 return TARGET_XFER_E_IO
;
10424 /* Check whether we've cached an end-of-object packet that matches
10426 if (rs
->finished_object
)
10428 if (strcmp (object_name
, rs
->finished_object
) == 0
10429 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10430 && offset
== rs
->finished_offset
)
10431 return TARGET_XFER_EOF
;
10434 /* Otherwise, we're now reading something different. Discard
10436 xfree (rs
->finished_object
);
10437 xfree (rs
->finished_annex
);
10438 rs
->finished_object
= NULL
;
10439 rs
->finished_annex
= NULL
;
10442 /* Request only enough to fit in a single packet. The actual data
10443 may not, since we don't know how much of it will need to be escaped;
10444 the target is free to respond with slightly less data. We subtract
10445 five to account for the response type and the protocol frame. */
10446 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10447 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10448 object_name
, annex
? annex
: "",
10449 phex_nz (offset
, sizeof offset
),
10450 phex_nz (n
, sizeof n
));
10451 i
= putpkt (rs
->buf
);
10453 return TARGET_XFER_E_IO
;
10456 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
10457 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10458 return TARGET_XFER_E_IO
;
10460 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10461 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
10463 /* 'm' means there is (or at least might be) more data after this
10464 batch. That does not make sense unless there's at least one byte
10465 of data in this reply. */
10466 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10467 error (_("Remote qXfer reply contained no data."));
10469 /* Got some data. */
10470 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
+ 1,
10471 packet_len
- 1, readbuf
, n
);
10473 /* 'l' is an EOF marker, possibly including a final block of data,
10474 or possibly empty. If we have the final block of a non-empty
10475 object, record this fact to bypass a subsequent partial read. */
10476 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10478 rs
->finished_object
= xstrdup (object_name
);
10479 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10480 rs
->finished_offset
= offset
+ i
;
10484 return TARGET_XFER_EOF
;
10488 return TARGET_XFER_OK
;
10492 static enum target_xfer_status
10493 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
10494 const char *annex
, gdb_byte
*readbuf
,
10495 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10496 ULONGEST
*xfered_len
)
10498 struct remote_state
*rs
;
10502 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10504 set_remote_traceframe ();
10505 set_general_thread (inferior_ptid
);
10507 rs
= get_remote_state ();
10509 /* Handle memory using the standard memory routines. */
10510 if (object
== TARGET_OBJECT_MEMORY
)
10512 /* If the remote target is connected but not running, we should
10513 pass this request down to a lower stratum (e.g. the executable
10515 if (!target_has_execution
)
10516 return TARGET_XFER_EOF
;
10518 if (writebuf
!= NULL
)
10519 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10522 return remote_read_bytes (ops
, offset
, readbuf
, len
, unit_size
,
10526 /* Handle SPU memory using qxfer packets. */
10527 if (object
== TARGET_OBJECT_SPU
)
10530 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
10531 xfered_len
, &remote_protocol_packets
10532 [PACKET_qXfer_spu_read
]);
10534 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
10535 xfered_len
, &remote_protocol_packets
10536 [PACKET_qXfer_spu_write
]);
10539 /* Handle extra signal info using qxfer packets. */
10540 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10543 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
10544 xfered_len
, &remote_protocol_packets
10545 [PACKET_qXfer_siginfo_read
]);
10547 return remote_write_qxfer (ops
, "siginfo", annex
,
10548 writebuf
, offset
, len
, xfered_len
,
10549 &remote_protocol_packets
10550 [PACKET_qXfer_siginfo_write
]);
10553 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10556 return remote_read_qxfer (ops
, "statictrace", annex
,
10557 readbuf
, offset
, len
, xfered_len
,
10558 &remote_protocol_packets
10559 [PACKET_qXfer_statictrace_read
]);
10561 return TARGET_XFER_E_IO
;
10564 /* Only handle flash writes. */
10565 if (writebuf
!= NULL
)
10569 case TARGET_OBJECT_FLASH
:
10570 return remote_flash_write (ops
, offset
, len
, xfered_len
,
10574 return TARGET_XFER_E_IO
;
10578 /* Map pre-existing objects onto letters. DO NOT do this for new
10579 objects!!! Instead specify new query packets. */
10582 case TARGET_OBJECT_AVR
:
10586 case TARGET_OBJECT_AUXV
:
10587 gdb_assert (annex
== NULL
);
10588 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
10590 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
10592 case TARGET_OBJECT_AVAILABLE_FEATURES
:
10593 return remote_read_qxfer
10594 (ops
, "features", annex
, readbuf
, offset
, len
, xfered_len
,
10595 &remote_protocol_packets
[PACKET_qXfer_features
]);
10597 case TARGET_OBJECT_LIBRARIES
:
10598 return remote_read_qxfer
10599 (ops
, "libraries", annex
, readbuf
, offset
, len
, xfered_len
,
10600 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
10602 case TARGET_OBJECT_LIBRARIES_SVR4
:
10603 return remote_read_qxfer
10604 (ops
, "libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
10605 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
10607 case TARGET_OBJECT_MEMORY_MAP
:
10608 gdb_assert (annex
== NULL
);
10609 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
10611 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
10613 case TARGET_OBJECT_OSDATA
:
10614 /* Should only get here if we're connected. */
10615 gdb_assert (rs
->remote_desc
);
10616 return remote_read_qxfer
10617 (ops
, "osdata", annex
, readbuf
, offset
, len
, xfered_len
,
10618 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
10620 case TARGET_OBJECT_THREADS
:
10621 gdb_assert (annex
== NULL
);
10622 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
10624 &remote_protocol_packets
[PACKET_qXfer_threads
]);
10626 case TARGET_OBJECT_TRACEFRAME_INFO
:
10627 gdb_assert (annex
== NULL
);
10628 return remote_read_qxfer
10629 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
10630 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
10632 case TARGET_OBJECT_FDPIC
:
10633 return remote_read_qxfer (ops
, "fdpic", annex
, readbuf
, offset
, len
,
10635 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
10637 case TARGET_OBJECT_OPENVMS_UIB
:
10638 return remote_read_qxfer (ops
, "uib", annex
, readbuf
, offset
, len
,
10640 &remote_protocol_packets
[PACKET_qXfer_uib
]);
10642 case TARGET_OBJECT_BTRACE
:
10643 return remote_read_qxfer (ops
, "btrace", annex
, readbuf
, offset
, len
,
10645 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
10647 case TARGET_OBJECT_BTRACE_CONF
:
10648 return remote_read_qxfer (ops
, "btrace-conf", annex
, readbuf
, offset
,
10650 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
10652 case TARGET_OBJECT_EXEC_FILE
:
10653 return remote_read_qxfer (ops
, "exec-file", annex
, readbuf
, offset
,
10655 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
10658 return TARGET_XFER_E_IO
;
10661 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10662 large enough let the caller deal with it. */
10663 if (len
< get_remote_packet_size ())
10664 return TARGET_XFER_E_IO
;
10665 len
= get_remote_packet_size ();
10667 /* Except for querying the minimum buffer size, target must be open. */
10668 if (!rs
->remote_desc
)
10669 error (_("remote query is only available after target open"));
10671 gdb_assert (annex
!= NULL
);
10672 gdb_assert (readbuf
!= NULL
);
10676 *p2
++ = query_type
;
10678 /* We used one buffer char for the remote protocol q command and
10679 another for the query type. As the remote protocol encapsulation
10680 uses 4 chars plus one extra in case we are debugging
10681 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10684 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
10686 /* Bad caller may have sent forbidden characters. */
10687 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
10692 gdb_assert (annex
[i
] == '\0');
10694 i
= putpkt (rs
->buf
);
10696 return TARGET_XFER_E_IO
;
10698 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10699 strcpy ((char *) readbuf
, rs
->buf
);
10701 *xfered_len
= strlen ((char *) readbuf
);
10702 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10705 /* Implementation of to_get_memory_xfer_limit. */
10708 remote_get_memory_xfer_limit (struct target_ops
*ops
)
10710 return get_memory_write_packet_size ();
10714 remote_search_memory (struct target_ops
* ops
,
10715 CORE_ADDR start_addr
, ULONGEST search_space_len
,
10716 const gdb_byte
*pattern
, ULONGEST pattern_len
,
10717 CORE_ADDR
*found_addrp
)
10719 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
10720 struct remote_state
*rs
= get_remote_state ();
10721 int max_size
= get_memory_write_packet_size ();
10722 struct packet_config
*packet
=
10723 &remote_protocol_packets
[PACKET_qSearch_memory
];
10724 /* Number of packet bytes used to encode the pattern;
10725 this could be more than PATTERN_LEN due to escape characters. */
10726 int escaped_pattern_len
;
10727 /* Amount of pattern that was encodable in the packet. */
10728 int used_pattern_len
;
10731 ULONGEST found_addr
;
10733 /* Don't go to the target if we don't have to.
10734 This is done before checking packet->support to avoid the possibility that
10735 a success for this edge case means the facility works in general. */
10736 if (pattern_len
> search_space_len
)
10738 if (pattern_len
== 0)
10740 *found_addrp
= start_addr
;
10744 /* If we already know the packet isn't supported, fall back to the simple
10745 way of searching memory. */
10747 if (packet_config_support (packet
) == PACKET_DISABLE
)
10749 /* Target doesn't provided special support, fall back and use the
10750 standard support (copy memory and do the search here). */
10751 return simple_search_memory (ops
, start_addr
, search_space_len
,
10752 pattern
, pattern_len
, found_addrp
);
10755 /* Make sure the remote is pointing at the right process. */
10756 set_general_process ();
10758 /* Insert header. */
10759 i
= snprintf (rs
->buf
, max_size
,
10760 "qSearch:memory:%s;%s;",
10761 phex_nz (start_addr
, addr_size
),
10762 phex_nz (search_space_len
, sizeof (search_space_len
)));
10763 max_size
-= (i
+ 1);
10765 /* Escape as much data as fits into rs->buf. */
10766 escaped_pattern_len
=
10767 remote_escape_output (pattern
, pattern_len
, 1, (gdb_byte
*) rs
->buf
+ i
,
10768 &used_pattern_len
, max_size
);
10770 /* Bail if the pattern is too large. */
10771 if (used_pattern_len
!= pattern_len
)
10772 error (_("Pattern is too large to transmit to remote target."));
10774 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
10775 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10776 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10778 /* The request may not have worked because the command is not
10779 supported. If so, fall back to the simple way. */
10780 if (packet
->support
== PACKET_DISABLE
)
10782 return simple_search_memory (ops
, start_addr
, search_space_len
,
10783 pattern
, pattern_len
, found_addrp
);
10788 if (rs
->buf
[0] == '0')
10790 else if (rs
->buf
[0] == '1')
10793 if (rs
->buf
[1] != ',')
10794 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10795 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
10796 *found_addrp
= found_addr
;
10799 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10805 remote_rcmd (struct target_ops
*self
, const char *command
,
10806 struct ui_file
*outbuf
)
10808 struct remote_state
*rs
= get_remote_state ();
10811 if (!rs
->remote_desc
)
10812 error (_("remote rcmd is only available after target open"));
10814 /* Send a NULL command across as an empty command. */
10815 if (command
== NULL
)
10818 /* The query prefix. */
10819 strcpy (rs
->buf
, "qRcmd,");
10820 p
= strchr (rs
->buf
, '\0');
10822 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
10823 > get_remote_packet_size ())
10824 error (_("\"monitor\" command ``%s'' is too long."), command
);
10826 /* Encode the actual command. */
10827 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
10829 if (putpkt (rs
->buf
) < 0)
10830 error (_("Communication problem with target."));
10832 /* get/display the response */
10837 /* XXX - see also remote_get_noisy_reply(). */
10838 QUIT
; /* Allow user to bail out with ^C. */
10840 if (getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) == -1)
10842 /* Timeout. Continue to (try to) read responses.
10843 This is better than stopping with an error, assuming the stub
10844 is still executing the (long) monitor command.
10845 If needed, the user can interrupt gdb using C-c, obtaining
10846 an effect similar to stop on timeout. */
10850 if (buf
[0] == '\0')
10851 error (_("Target does not support this command."));
10852 if (buf
[0] == 'O' && buf
[1] != 'K')
10854 remote_console_output (buf
+ 1); /* 'O' message from stub. */
10857 if (strcmp (buf
, "OK") == 0)
10859 if (strlen (buf
) == 3 && buf
[0] == 'E'
10860 && isdigit (buf
[1]) && isdigit (buf
[2]))
10862 error (_("Protocol error with Rcmd"));
10864 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
10866 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
10868 fputc_unfiltered (c
, outbuf
);
10874 static std::vector
<mem_region
>
10875 remote_memory_map (struct target_ops
*ops
)
10877 std::vector
<mem_region
> result
;
10878 gdb::unique_xmalloc_ptr
<char> text
10879 = target_read_stralloc (¤t_target
, TARGET_OBJECT_MEMORY_MAP
, NULL
);
10882 result
= parse_memory_map (text
.get ());
10888 packet_command (const char *args
, int from_tty
)
10890 struct remote_state
*rs
= get_remote_state ();
10892 if (!rs
->remote_desc
)
10893 error (_("command can only be used with remote target"));
10896 error (_("remote-packet command requires packet text as argument"));
10898 puts_filtered ("sending: ");
10899 print_packet (args
);
10900 puts_filtered ("\n");
10903 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10904 puts_filtered ("received: ");
10905 print_packet (rs
->buf
);
10906 puts_filtered ("\n");
10910 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10912 static void display_thread_info (struct gdb_ext_thread_info
*info
);
10914 static void threadset_test_cmd (char *cmd
, int tty
);
10916 static void threadalive_test (char *cmd
, int tty
);
10918 static void threadlist_test_cmd (char *cmd
, int tty
);
10920 int get_and_display_threadinfo (threadref
*ref
);
10922 static void threadinfo_test_cmd (char *cmd
, int tty
);
10924 static int thread_display_step (threadref
*ref
, void *context
);
10926 static void threadlist_update_test_cmd (char *cmd
, int tty
);
10928 static void init_remote_threadtests (void);
10930 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10933 threadset_test_cmd (const char *cmd
, int tty
)
10935 int sample_thread
= SAMPLE_THREAD
;
10937 printf_filtered (_("Remote threadset test\n"));
10938 set_general_thread (sample_thread
);
10943 threadalive_test (const char *cmd
, int tty
)
10945 int sample_thread
= SAMPLE_THREAD
;
10946 int pid
= ptid_get_pid (inferior_ptid
);
10947 ptid_t ptid
= ptid_build (pid
, sample_thread
, 0);
10949 if (remote_thread_alive (ptid
))
10950 printf_filtered ("PASS: Thread alive test\n");
10952 printf_filtered ("FAIL: Thread alive test\n");
10955 void output_threadid (char *title
, threadref
*ref
);
10958 output_threadid (char *title
, threadref
*ref
)
10962 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
10964 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
10968 threadlist_test_cmd (const char *cmd
, int tty
)
10971 threadref nextthread
;
10972 int done
, result_count
;
10973 threadref threadlist
[3];
10975 printf_filtered ("Remote Threadlist test\n");
10976 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
10977 &result_count
, &threadlist
[0]))
10978 printf_filtered ("FAIL: threadlist test\n");
10981 threadref
*scan
= threadlist
;
10982 threadref
*limit
= scan
+ result_count
;
10984 while (scan
< limit
)
10985 output_threadid (" thread ", scan
++);
10990 display_thread_info (struct gdb_ext_thread_info
*info
)
10992 output_threadid ("Threadid: ", &info
->threadid
);
10993 printf_filtered ("Name: %s\n ", info
->shortname
);
10994 printf_filtered ("State: %s\n", info
->display
);
10995 printf_filtered ("other: %s\n\n", info
->more_display
);
10999 get_and_display_threadinfo (threadref
*ref
)
11003 struct gdb_ext_thread_info threadinfo
;
11005 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11006 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11007 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11008 display_thread_info (&threadinfo
);
11013 threadinfo_test_cmd (const char *cmd
, int tty
)
11015 int athread
= SAMPLE_THREAD
;
11019 int_to_threadref (&thread
, athread
);
11020 printf_filtered ("Remote Threadinfo test\n");
11021 if (!get_and_display_threadinfo (&thread
))
11022 printf_filtered ("FAIL cannot get thread info\n");
11026 thread_display_step (threadref
*ref
, void *context
)
11028 /* output_threadid(" threadstep ",ref); *//* simple test */
11029 return get_and_display_threadinfo (ref
);
11033 threadlist_update_test_cmd (const char *cmd
, int tty
)
11035 printf_filtered ("Remote Threadlist update test\n");
11036 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11040 init_remote_threadtests (void)
11042 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11043 _("Fetch and print the remote list of "
11044 "thread identifiers, one pkt only"));
11045 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11046 _("Fetch and display info about one thread"));
11047 add_com ("tset", class_obscure
, threadset_test_cmd
,
11048 _("Test setting to a different thread"));
11049 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11050 _("Iterate through updating all remote thread info"));
11051 add_com ("talive", class_obscure
, threadalive_test
,
11052 _(" Remote thread alive test "));
11057 /* Convert a thread ID to a string. Returns the string in a static
11060 static const char *
11061 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
11063 static char buf
[64];
11064 struct remote_state
*rs
= get_remote_state ();
11066 if (ptid_equal (ptid
, null_ptid
))
11067 return normal_pid_to_str (ptid
);
11068 else if (ptid_is_pid (ptid
))
11070 /* Printing an inferior target id. */
11072 /* When multi-process extensions are off, there's no way in the
11073 remote protocol to know the remote process id, if there's any
11074 at all. There's one exception --- when we're connected with
11075 target extended-remote, and we manually attached to a process
11076 with "attach PID". We don't record anywhere a flag that
11077 allows us to distinguish that case from the case of
11078 connecting with extended-remote and the stub already being
11079 attached to a process, and reporting yes to qAttached, hence
11080 no smart special casing here. */
11081 if (!remote_multi_process_p (rs
))
11083 xsnprintf (buf
, sizeof buf
, "Remote target");
11087 return normal_pid_to_str (ptid
);
11091 if (ptid_equal (magic_null_ptid
, ptid
))
11092 xsnprintf (buf
, sizeof buf
, "Thread <main>");
11093 else if (remote_multi_process_p (rs
))
11094 if (ptid_get_lwp (ptid
) == 0)
11095 return normal_pid_to_str (ptid
);
11097 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
11098 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
11100 xsnprintf (buf
, sizeof buf
, "Thread %ld",
11101 ptid_get_lwp (ptid
));
11106 /* Get the address of the thread local variable in OBJFILE which is
11107 stored at OFFSET within the thread local storage for thread PTID. */
11110 remote_get_thread_local_address (struct target_ops
*ops
,
11111 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
11113 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11115 struct remote_state
*rs
= get_remote_state ();
11117 char *endp
= rs
->buf
+ get_remote_packet_size ();
11118 enum packet_result result
;
11120 strcpy (p
, "qGetTLSAddr:");
11122 p
= write_ptid (p
, endp
, ptid
);
11124 p
+= hexnumstr (p
, offset
);
11126 p
+= hexnumstr (p
, lm
);
11130 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11131 result
= packet_ok (rs
->buf
,
11132 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11133 if (result
== PACKET_OK
)
11137 unpack_varlen_hex (rs
->buf
, &result
);
11140 else if (result
== PACKET_UNKNOWN
)
11141 throw_error (TLS_GENERIC_ERROR
,
11142 _("Remote target doesn't support qGetTLSAddr packet"));
11144 throw_error (TLS_GENERIC_ERROR
,
11145 _("Remote target failed to process qGetTLSAddr request"));
11148 throw_error (TLS_GENERIC_ERROR
,
11149 _("TLS not supported or disabled on this target"));
11154 /* Provide thread local base, i.e. Thread Information Block address.
11155 Returns 1 if ptid is found and thread_local_base is non zero. */
11158 remote_get_tib_address (struct target_ops
*self
, ptid_t ptid
, CORE_ADDR
*addr
)
11160 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11162 struct remote_state
*rs
= get_remote_state ();
11164 char *endp
= rs
->buf
+ get_remote_packet_size ();
11165 enum packet_result result
;
11167 strcpy (p
, "qGetTIBAddr:");
11169 p
= write_ptid (p
, endp
, ptid
);
11173 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11174 result
= packet_ok (rs
->buf
,
11175 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11176 if (result
== PACKET_OK
)
11180 unpack_varlen_hex (rs
->buf
, &result
);
11182 *addr
= (CORE_ADDR
) result
;
11185 else if (result
== PACKET_UNKNOWN
)
11186 error (_("Remote target doesn't support qGetTIBAddr packet"));
11188 error (_("Remote target failed to process qGetTIBAddr request"));
11191 error (_("qGetTIBAddr not supported or disabled on this target"));
11196 /* Support for inferring a target description based on the current
11197 architecture and the size of a 'g' packet. While the 'g' packet
11198 can have any size (since optional registers can be left off the
11199 end), some sizes are easily recognizable given knowledge of the
11200 approximate architecture. */
11202 struct remote_g_packet_guess
11205 const struct target_desc
*tdesc
;
11207 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
11208 DEF_VEC_O(remote_g_packet_guess_s
);
11210 struct remote_g_packet_data
11212 VEC(remote_g_packet_guess_s
) *guesses
;
11215 static struct gdbarch_data
*remote_g_packet_data_handle
;
11218 remote_g_packet_data_init (struct obstack
*obstack
)
11220 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
11224 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11225 const struct target_desc
*tdesc
)
11227 struct remote_g_packet_data
*data
11228 = ((struct remote_g_packet_data
*)
11229 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11230 struct remote_g_packet_guess new_guess
, *guess
;
11233 gdb_assert (tdesc
!= NULL
);
11236 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11238 if (guess
->bytes
== bytes
)
11239 internal_error (__FILE__
, __LINE__
,
11240 _("Duplicate g packet description added for size %d"),
11243 new_guess
.bytes
= bytes
;
11244 new_guess
.tdesc
= tdesc
;
11245 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
11248 /* Return 1 if remote_read_description would do anything on this target
11249 and architecture, 0 otherwise. */
11252 remote_read_description_p (struct target_ops
*target
)
11254 struct remote_g_packet_data
*data
11255 = ((struct remote_g_packet_data
*)
11256 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11258 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11264 static const struct target_desc
*
11265 remote_read_description (struct target_ops
*target
)
11267 struct remote_g_packet_data
*data
11268 = ((struct remote_g_packet_data
*)
11269 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11271 /* Do not try this during initial connection, when we do not know
11272 whether there is a running but stopped thread. */
11273 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
11274 return target
->beneath
->to_read_description (target
->beneath
);
11276 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11278 struct remote_g_packet_guess
*guess
;
11280 int bytes
= send_g_packet ();
11283 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11285 if (guess
->bytes
== bytes
)
11286 return guess
->tdesc
;
11288 /* We discard the g packet. A minor optimization would be to
11289 hold on to it, and fill the register cache once we have selected
11290 an architecture, but it's too tricky to do safely. */
11293 return target
->beneath
->to_read_description (target
->beneath
);
11296 /* Remote file transfer support. This is host-initiated I/O, not
11297 target-initiated; for target-initiated, see remote-fileio.c. */
11299 /* If *LEFT is at least the length of STRING, copy STRING to
11300 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11301 decrease *LEFT. Otherwise raise an error. */
11304 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11306 int len
= strlen (string
);
11309 error (_("Packet too long for target."));
11311 memcpy (*buffer
, string
, len
);
11315 /* NUL-terminate the buffer as a convenience, if there is
11321 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11322 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11323 decrease *LEFT. Otherwise raise an error. */
11326 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11329 if (2 * len
> *left
)
11330 error (_("Packet too long for target."));
11332 bin2hex (bytes
, *buffer
, len
);
11333 *buffer
+= 2 * len
;
11336 /* NUL-terminate the buffer as a convenience, if there is
11342 /* If *LEFT is large enough, convert VALUE to hex and add it to
11343 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11344 decrease *LEFT. Otherwise raise an error. */
11347 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11349 int len
= hexnumlen (value
);
11352 error (_("Packet too long for target."));
11354 hexnumstr (*buffer
, value
);
11358 /* NUL-terminate the buffer as a convenience, if there is
11364 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11365 value, *REMOTE_ERRNO to the remote error number or zero if none
11366 was included, and *ATTACHMENT to point to the start of the annex
11367 if any. The length of the packet isn't needed here; there may
11368 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11370 Return 0 if the packet could be parsed, -1 if it could not. If
11371 -1 is returned, the other variables may not be initialized. */
11374 remote_hostio_parse_result (char *buffer
, int *retcode
,
11375 int *remote_errno
, char **attachment
)
11380 *attachment
= NULL
;
11382 if (buffer
[0] != 'F')
11386 *retcode
= strtol (&buffer
[1], &p
, 16);
11387 if (errno
!= 0 || p
== &buffer
[1])
11390 /* Check for ",errno". */
11394 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11395 if (errno
!= 0 || p
+ 1 == p2
)
11400 /* Check for ";attachment". If there is no attachment, the
11401 packet should end here. */
11404 *attachment
= p
+ 1;
11407 else if (*p
== '\0')
11413 /* Send a prepared I/O packet to the target and read its response.
11414 The prepared packet is in the global RS->BUF before this function
11415 is called, and the answer is there when we return.
11417 COMMAND_BYTES is the length of the request to send, which may include
11418 binary data. WHICH_PACKET is the packet configuration to check
11419 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11420 is set to the error number and -1 is returned. Otherwise the value
11421 returned by the function is returned.
11423 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11424 attachment is expected; an error will be reported if there's a
11425 mismatch. If one is found, *ATTACHMENT will be set to point into
11426 the packet buffer and *ATTACHMENT_LEN will be set to the
11427 attachment's length. */
11430 remote_hostio_send_command (int command_bytes
, int which_packet
,
11431 int *remote_errno
, char **attachment
,
11432 int *attachment_len
)
11434 struct remote_state
*rs
= get_remote_state ();
11435 int ret
, bytes_read
;
11436 char *attachment_tmp
;
11438 if (!rs
->remote_desc
11439 || packet_support (which_packet
) == PACKET_DISABLE
)
11441 *remote_errno
= FILEIO_ENOSYS
;
11445 putpkt_binary (rs
->buf
, command_bytes
);
11446 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
11448 /* If it timed out, something is wrong. Don't try to parse the
11450 if (bytes_read
< 0)
11452 *remote_errno
= FILEIO_EINVAL
;
11456 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11459 *remote_errno
= FILEIO_EINVAL
;
11461 case PACKET_UNKNOWN
:
11462 *remote_errno
= FILEIO_ENOSYS
;
11468 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
11471 *remote_errno
= FILEIO_EINVAL
;
11475 /* Make sure we saw an attachment if and only if we expected one. */
11476 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11477 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11479 *remote_errno
= FILEIO_EINVAL
;
11483 /* If an attachment was found, it must point into the packet buffer;
11484 work out how many bytes there were. */
11485 if (attachment_tmp
!= NULL
)
11487 *attachment
= attachment_tmp
;
11488 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
11494 /* Invalidate the readahead cache. */
11497 readahead_cache_invalidate (void)
11499 struct remote_state
*rs
= get_remote_state ();
11501 rs
->readahead_cache
.fd
= -1;
11504 /* Invalidate the readahead cache if it is holding data for FD. */
11507 readahead_cache_invalidate_fd (int fd
)
11509 struct remote_state
*rs
= get_remote_state ();
11511 if (rs
->readahead_cache
.fd
== fd
)
11512 rs
->readahead_cache
.fd
= -1;
11515 /* Set the filesystem remote_hostio functions that take FILENAME
11516 arguments will use. Return 0 on success, or -1 if an error
11517 occurs (and set *REMOTE_ERRNO). */
11520 remote_hostio_set_filesystem (struct inferior
*inf
, int *remote_errno
)
11522 struct remote_state
*rs
= get_remote_state ();
11523 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11525 int left
= get_remote_packet_size () - 1;
11529 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11532 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11535 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11537 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11538 remote_buffer_add_string (&p
, &left
, arg
);
11540 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_setfs
,
11541 remote_errno
, NULL
, NULL
);
11543 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11547 rs
->fs_pid
= required_pid
;
11552 /* Implementation of to_fileio_open. */
11555 remote_hostio_open (struct target_ops
*self
,
11556 struct inferior
*inf
, const char *filename
,
11557 int flags
, int mode
, int warn_if_slow
,
11560 struct remote_state
*rs
= get_remote_state ();
11562 int left
= get_remote_packet_size () - 1;
11566 static int warning_issued
= 0;
11568 printf_unfiltered (_("Reading %s from remote target...\n"),
11571 if (!warning_issued
)
11573 warning (_("File transfers from remote targets can be slow."
11574 " Use \"set sysroot\" to access files locally"
11576 warning_issued
= 1;
11580 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11583 remote_buffer_add_string (&p
, &left
, "vFile:open:");
11585 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11586 strlen (filename
));
11587 remote_buffer_add_string (&p
, &left
, ",");
11589 remote_buffer_add_int (&p
, &left
, flags
);
11590 remote_buffer_add_string (&p
, &left
, ",");
11592 remote_buffer_add_int (&p
, &left
, mode
);
11594 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
11595 remote_errno
, NULL
, NULL
);
11598 /* Implementation of to_fileio_pwrite. */
11601 remote_hostio_pwrite (struct target_ops
*self
,
11602 int fd
, const gdb_byte
*write_buf
, int len
,
11603 ULONGEST offset
, int *remote_errno
)
11605 struct remote_state
*rs
= get_remote_state ();
11607 int left
= get_remote_packet_size ();
11610 readahead_cache_invalidate_fd (fd
);
11612 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
11614 remote_buffer_add_int (&p
, &left
, fd
);
11615 remote_buffer_add_string (&p
, &left
, ",");
11617 remote_buffer_add_int (&p
, &left
, offset
);
11618 remote_buffer_add_string (&p
, &left
, ",");
11620 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
11621 get_remote_packet_size () - (p
- rs
->buf
));
11623 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
11624 remote_errno
, NULL
, NULL
);
11627 /* Helper for the implementation of to_fileio_pread. Read the file
11628 from the remote side with vFile:pread. */
11631 remote_hostio_pread_vFile (struct target_ops
*self
,
11632 int fd
, gdb_byte
*read_buf
, int len
,
11633 ULONGEST offset
, int *remote_errno
)
11635 struct remote_state
*rs
= get_remote_state ();
11638 int left
= get_remote_packet_size ();
11639 int ret
, attachment_len
;
11642 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
11644 remote_buffer_add_int (&p
, &left
, fd
);
11645 remote_buffer_add_string (&p
, &left
, ",");
11647 remote_buffer_add_int (&p
, &left
, len
);
11648 remote_buffer_add_string (&p
, &left
, ",");
11650 remote_buffer_add_int (&p
, &left
, offset
);
11652 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
11653 remote_errno
, &attachment
,
11659 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11661 if (read_len
!= ret
)
11662 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
11667 /* Serve pread from the readahead cache. Returns number of bytes
11668 read, or 0 if the request can't be served from the cache. */
11671 remote_hostio_pread_from_cache (struct remote_state
*rs
,
11672 int fd
, gdb_byte
*read_buf
, size_t len
,
11675 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11677 if (cache
->fd
== fd
11678 && cache
->offset
<= offset
11679 && offset
< cache
->offset
+ cache
->bufsize
)
11681 ULONGEST max
= cache
->offset
+ cache
->bufsize
;
11683 if (offset
+ len
> max
)
11684 len
= max
- offset
;
11686 memcpy (read_buf
, cache
->buf
+ offset
- cache
->offset
, len
);
11693 /* Implementation of to_fileio_pread. */
11696 remote_hostio_pread (struct target_ops
*self
,
11697 int fd
, gdb_byte
*read_buf
, int len
,
11698 ULONGEST offset
, int *remote_errno
)
11701 struct remote_state
*rs
= get_remote_state ();
11702 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11704 ret
= remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11707 cache
->hit_count
++;
11710 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
11711 pulongest (cache
->hit_count
));
11715 cache
->miss_count
++;
11717 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
11718 pulongest (cache
->miss_count
));
11721 cache
->offset
= offset
;
11722 cache
->bufsize
= get_remote_packet_size ();
11723 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
11725 ret
= remote_hostio_pread_vFile (self
, cache
->fd
, cache
->buf
, cache
->bufsize
,
11726 cache
->offset
, remote_errno
);
11729 readahead_cache_invalidate_fd (fd
);
11733 cache
->bufsize
= ret
;
11734 return remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11737 /* Implementation of to_fileio_close. */
11740 remote_hostio_close (struct target_ops
*self
, int fd
, int *remote_errno
)
11742 struct remote_state
*rs
= get_remote_state ();
11744 int left
= get_remote_packet_size () - 1;
11746 readahead_cache_invalidate_fd (fd
);
11748 remote_buffer_add_string (&p
, &left
, "vFile:close:");
11750 remote_buffer_add_int (&p
, &left
, fd
);
11752 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
11753 remote_errno
, NULL
, NULL
);
11756 /* Implementation of to_fileio_unlink. */
11759 remote_hostio_unlink (struct target_ops
*self
,
11760 struct inferior
*inf
, const char *filename
,
11763 struct remote_state
*rs
= get_remote_state ();
11765 int left
= get_remote_packet_size () - 1;
11767 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11770 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
11772 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11773 strlen (filename
));
11775 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
11776 remote_errno
, NULL
, NULL
);
11779 /* Implementation of to_fileio_readlink. */
11782 remote_hostio_readlink (struct target_ops
*self
,
11783 struct inferior
*inf
, const char *filename
,
11786 struct remote_state
*rs
= get_remote_state ();
11789 int left
= get_remote_packet_size ();
11790 int len
, attachment_len
;
11794 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11797 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
11799 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11800 strlen (filename
));
11802 len
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_readlink
,
11803 remote_errno
, &attachment
,
11809 ret
= (char *) xmalloc (len
+ 1);
11811 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11812 (gdb_byte
*) ret
, len
);
11813 if (read_len
!= len
)
11814 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
11820 /* Implementation of to_fileio_fstat. */
11823 remote_hostio_fstat (struct target_ops
*self
,
11824 int fd
, struct stat
*st
,
11827 struct remote_state
*rs
= get_remote_state ();
11829 int left
= get_remote_packet_size ();
11830 int attachment_len
, ret
;
11832 struct fio_stat fst
;
11835 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
11837 remote_buffer_add_int (&p
, &left
, fd
);
11839 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_fstat
,
11840 remote_errno
, &attachment
,
11844 if (*remote_errno
!= FILEIO_ENOSYS
)
11847 /* Strictly we should return -1, ENOSYS here, but when
11848 "set sysroot remote:" was implemented in August 2008
11849 BFD's need for a stat function was sidestepped with
11850 this hack. This was not remedied until March 2015
11851 so we retain the previous behavior to avoid breaking
11854 Note that the memset is a March 2015 addition; older
11855 GDBs set st_size *and nothing else* so the structure
11856 would have garbage in all other fields. This might
11857 break something but retaining the previous behavior
11858 here would be just too wrong. */
11860 memset (st
, 0, sizeof (struct stat
));
11861 st
->st_size
= INT_MAX
;
11865 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11866 (gdb_byte
*) &fst
, sizeof (fst
));
11868 if (read_len
!= ret
)
11869 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
11871 if (read_len
!= sizeof (fst
))
11872 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11873 read_len
, (int) sizeof (fst
));
11875 remote_fileio_to_host_stat (&fst
, st
);
11880 /* Implementation of to_filesystem_is_local. */
11883 remote_filesystem_is_local (struct target_ops
*self
)
11885 /* Valgrind GDB presents itself as a remote target but works
11886 on the local filesystem: it does not implement remote get
11887 and users are not expected to set a sysroot. To handle
11888 this case we treat the remote filesystem as local if the
11889 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11890 does not support vFile:open. */
11891 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
11893 enum packet_support ps
= packet_support (PACKET_vFile_open
);
11895 if (ps
== PACKET_SUPPORT_UNKNOWN
)
11897 int fd
, remote_errno
;
11899 /* Try opening a file to probe support. The supplied
11900 filename is irrelevant, we only care about whether
11901 the stub recognizes the packet or not. */
11902 fd
= remote_hostio_open (self
, NULL
, "just probing",
11903 FILEIO_O_RDONLY
, 0700, 0,
11907 remote_hostio_close (self
, fd
, &remote_errno
);
11909 ps
= packet_support (PACKET_vFile_open
);
11912 if (ps
== PACKET_DISABLE
)
11914 static int warning_issued
= 0;
11916 if (!warning_issued
)
11918 warning (_("remote target does not support file"
11919 " transfer, attempting to access files"
11920 " from local filesystem."));
11921 warning_issued
= 1;
11932 remote_fileio_errno_to_host (int errnum
)
11938 case FILEIO_ENOENT
:
11946 case FILEIO_EACCES
:
11948 case FILEIO_EFAULT
:
11952 case FILEIO_EEXIST
:
11954 case FILEIO_ENODEV
:
11956 case FILEIO_ENOTDIR
:
11958 case FILEIO_EISDIR
:
11960 case FILEIO_EINVAL
:
11962 case FILEIO_ENFILE
:
11964 case FILEIO_EMFILE
:
11968 case FILEIO_ENOSPC
:
11970 case FILEIO_ESPIPE
:
11974 case FILEIO_ENOSYS
:
11976 case FILEIO_ENAMETOOLONG
:
11977 return ENAMETOOLONG
;
11983 remote_hostio_error (int errnum
)
11985 int host_error
= remote_fileio_errno_to_host (errnum
);
11987 if (host_error
== -1)
11988 error (_("Unknown remote I/O error %d"), errnum
);
11990 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
11994 remote_hostio_close_cleanup (void *opaque
)
11996 int fd
= *(int *) opaque
;
11999 remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
);
12003 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12005 struct cleanup
*back_to
, *close_cleanup
;
12006 int retcode
, fd
, remote_errno
, bytes
, io_size
;
12008 int bytes_in_buffer
;
12011 struct remote_state
*rs
= get_remote_state ();
12013 if (!rs
->remote_desc
)
12014 error (_("command can only be used with remote target"));
12016 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12018 perror_with_name (local_file
);
12020 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
12021 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12023 0700, 0, &remote_errno
);
12025 remote_hostio_error (remote_errno
);
12027 /* Send up to this many bytes at once. They won't all fit in the
12028 remote packet limit, so we'll transfer slightly fewer. */
12029 io_size
= get_remote_packet_size ();
12030 buffer
= (gdb_byte
*) xmalloc (io_size
);
12031 back_to
= make_cleanup (xfree
, buffer
);
12033 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
12035 bytes_in_buffer
= 0;
12038 while (bytes_in_buffer
|| !saw_eof
)
12042 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
12043 io_size
- bytes_in_buffer
,
12047 if (ferror (file
.get ()))
12048 error (_("Error reading %s."), local_file
);
12051 /* EOF. Unless there is something still in the
12052 buffer from the last iteration, we are done. */
12054 if (bytes_in_buffer
== 0)
12062 bytes
+= bytes_in_buffer
;
12063 bytes_in_buffer
= 0;
12065 retcode
= remote_hostio_pwrite (find_target_at (process_stratum
),
12067 offset
, &remote_errno
);
12070 remote_hostio_error (remote_errno
);
12071 else if (retcode
== 0)
12072 error (_("Remote write of %d bytes returned 0!"), bytes
);
12073 else if (retcode
< bytes
)
12075 /* Short write. Save the rest of the read data for the next
12077 bytes_in_buffer
= bytes
- retcode
;
12078 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
12084 discard_cleanups (close_cleanup
);
12085 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12086 remote_hostio_error (remote_errno
);
12089 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12090 do_cleanups (back_to
);
12094 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12096 struct cleanup
*back_to
, *close_cleanup
;
12097 int fd
, remote_errno
, bytes
, io_size
;
12100 struct remote_state
*rs
= get_remote_state ();
12102 if (!rs
->remote_desc
)
12103 error (_("command can only be used with remote target"));
12105 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
12106 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12109 remote_hostio_error (remote_errno
);
12111 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12113 perror_with_name (local_file
);
12115 /* Send up to this many bytes at once. They won't all fit in the
12116 remote packet limit, so we'll transfer slightly fewer. */
12117 io_size
= get_remote_packet_size ();
12118 buffer
= (gdb_byte
*) xmalloc (io_size
);
12119 back_to
= make_cleanup (xfree
, buffer
);
12121 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
12126 bytes
= remote_hostio_pread (find_target_at (process_stratum
),
12127 fd
, buffer
, io_size
, offset
, &remote_errno
);
12129 /* Success, but no bytes, means end-of-file. */
12132 remote_hostio_error (remote_errno
);
12136 bytes
= fwrite (buffer
, 1, bytes
, file
.get ());
12138 perror_with_name (local_file
);
12141 discard_cleanups (close_cleanup
);
12142 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12143 remote_hostio_error (remote_errno
);
12146 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12147 do_cleanups (back_to
);
12151 remote_file_delete (const char *remote_file
, int from_tty
)
12153 int retcode
, remote_errno
;
12154 struct remote_state
*rs
= get_remote_state ();
12156 if (!rs
->remote_desc
)
12157 error (_("command can only be used with remote target"));
12159 retcode
= remote_hostio_unlink (find_target_at (process_stratum
),
12160 NULL
, remote_file
, &remote_errno
);
12162 remote_hostio_error (remote_errno
);
12165 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12169 remote_put_command (const char *args
, int from_tty
)
12172 error_no_arg (_("file to put"));
12174 gdb_argv
argv (args
);
12175 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12176 error (_("Invalid parameters to remote put"));
12178 remote_file_put (argv
[0], argv
[1], from_tty
);
12182 remote_get_command (const char *args
, int from_tty
)
12185 error_no_arg (_("file to get"));
12187 gdb_argv
argv (args
);
12188 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12189 error (_("Invalid parameters to remote get"));
12191 remote_file_get (argv
[0], argv
[1], from_tty
);
12195 remote_delete_command (const char *args
, int from_tty
)
12198 error_no_arg (_("file to delete"));
12200 gdb_argv
argv (args
);
12201 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12202 error (_("Invalid parameters to remote delete"));
12204 remote_file_delete (argv
[0], from_tty
);
12208 remote_command (const char *args
, int from_tty
)
12210 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
12214 remote_can_execute_reverse (struct target_ops
*self
)
12216 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12217 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12224 remote_supports_non_stop (struct target_ops
*self
)
12230 remote_supports_disable_randomization (struct target_ops
*self
)
12232 /* Only supported in extended mode. */
12237 remote_supports_multi_process (struct target_ops
*self
)
12239 struct remote_state
*rs
= get_remote_state ();
12241 return remote_multi_process_p (rs
);
12245 remote_supports_cond_tracepoints (void)
12247 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12251 remote_supports_cond_breakpoints (struct target_ops
*self
)
12253 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12257 remote_supports_fast_tracepoints (void)
12259 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12263 remote_supports_static_tracepoints (void)
12265 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12269 remote_supports_install_in_trace (void)
12271 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12275 remote_supports_enable_disable_tracepoint (struct target_ops
*self
)
12277 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12282 remote_supports_string_tracing (struct target_ops
*self
)
12284 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12288 remote_can_run_breakpoint_commands (struct target_ops
*self
)
12290 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12294 remote_trace_init (struct target_ops
*self
)
12296 struct remote_state
*rs
= get_remote_state ();
12299 remote_get_noisy_reply ();
12300 if (strcmp (rs
->buf
, "OK") != 0)
12301 error (_("Target does not support this command."));
12304 /* Recursive routine to walk through command list including loops, and
12305 download packets for each command. */
12308 remote_download_command_source (int num
, ULONGEST addr
,
12309 struct command_line
*cmds
)
12311 struct remote_state
*rs
= get_remote_state ();
12312 struct command_line
*cmd
;
12314 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12316 QUIT
; /* Allow user to bail out with ^C. */
12317 strcpy (rs
->buf
, "QTDPsrc:");
12318 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12319 rs
->buf
+ strlen (rs
->buf
),
12320 rs
->buf_size
- strlen (rs
->buf
));
12322 remote_get_noisy_reply ();
12323 if (strcmp (rs
->buf
, "OK"))
12324 warning (_("Target does not support source download."));
12326 if (cmd
->control_type
== while_control
12327 || cmd
->control_type
== while_stepping_control
)
12329 remote_download_command_source (num
, addr
, *cmd
->body_list
);
12331 QUIT
; /* Allow user to bail out with ^C. */
12332 strcpy (rs
->buf
, "QTDPsrc:");
12333 encode_source_string (num
, addr
, "cmd", "end",
12334 rs
->buf
+ strlen (rs
->buf
),
12335 rs
->buf_size
- strlen (rs
->buf
));
12337 remote_get_noisy_reply ();
12338 if (strcmp (rs
->buf
, "OK"))
12339 warning (_("Target does not support source download."));
12345 remote_download_tracepoint (struct target_ops
*self
, struct bp_location
*loc
)
12347 #define BUF_SIZE 2048
12351 char buf
[BUF_SIZE
];
12352 std::vector
<std::string
> tdp_actions
;
12353 std::vector
<std::string
> stepping_actions
;
12355 struct breakpoint
*b
= loc
->owner
;
12356 struct tracepoint
*t
= (struct tracepoint
*) b
;
12357 struct remote_state
*rs
= get_remote_state ();
12359 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12361 tpaddr
= loc
->address
;
12362 sprintf_vma (addrbuf
, tpaddr
);
12363 xsnprintf (buf
, BUF_SIZE
, "QTDP:%x:%s:%c:%lx:%x", b
->number
,
12364 addrbuf
, /* address */
12365 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12366 t
->step_count
, t
->pass_count
);
12367 /* Fast tracepoints are mostly handled by the target, but we can
12368 tell the target how big of an instruction block should be moved
12370 if (b
->type
== bp_fast_tracepoint
)
12372 /* Only test for support at download time; we may not know
12373 target capabilities at definition time. */
12374 if (remote_supports_fast_tracepoints ())
12376 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12378 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":F%x",
12379 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12381 /* If it passed validation at definition but fails now,
12382 something is very wrong. */
12383 internal_error (__FILE__
, __LINE__
,
12384 _("Fast tracepoint not "
12385 "valid during download"));
12388 /* Fast tracepoints are functionally identical to regular
12389 tracepoints, so don't take lack of support as a reason to
12390 give up on the trace run. */
12391 warning (_("Target does not support fast tracepoints, "
12392 "downloading %d as regular tracepoint"), b
->number
);
12394 else if (b
->type
== bp_static_tracepoint
)
12396 /* Only test for support at download time; we may not know
12397 target capabilities at definition time. */
12398 if (remote_supports_static_tracepoints ())
12400 struct static_tracepoint_marker marker
;
12402 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12403 strcat (buf
, ":S");
12405 error (_("Static tracepoint not valid during download"));
12408 /* Fast tracepoints are functionally identical to regular
12409 tracepoints, so don't take lack of support as a reason
12410 to give up on the trace run. */
12411 error (_("Target does not support static tracepoints"));
12413 /* If the tracepoint has a conditional, make it into an agent
12414 expression and append to the definition. */
12417 /* Only test support at download time, we may not know target
12418 capabilities at definition time. */
12419 if (remote_supports_cond_tracepoints ())
12421 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
.get ());
12422 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":X%x,",
12424 pkt
= buf
+ strlen (buf
);
12425 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12426 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12430 warning (_("Target does not support conditional tracepoints, "
12431 "ignoring tp %d cond"), b
->number
);
12434 if (b
->commands
|| *default_collect
)
12437 remote_get_noisy_reply ();
12438 if (strcmp (rs
->buf
, "OK"))
12439 error (_("Target does not support tracepoints."));
12441 /* do_single_steps (t); */
12442 for (auto action_it
= tdp_actions
.begin ();
12443 action_it
!= tdp_actions
.end (); action_it
++)
12445 QUIT
; /* Allow user to bail out with ^C. */
12447 bool has_more
= (action_it
!= tdp_actions
.end ()
12448 || !stepping_actions
.empty ());
12450 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%c",
12451 b
->number
, addrbuf
, /* address */
12452 action_it
->c_str (),
12453 has_more
? '-' : 0);
12455 remote_get_noisy_reply ();
12456 if (strcmp (rs
->buf
, "OK"))
12457 error (_("Error on target while setting tracepoints."));
12460 for (auto action_it
= stepping_actions
.begin ();
12461 action_it
!= stepping_actions
.end (); action_it
++)
12463 QUIT
; /* Allow user to bail out with ^C. */
12465 bool is_first
= action_it
== stepping_actions
.begin ();
12466 bool has_more
= action_it
!= stepping_actions
.end ();
12468 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%s%s",
12469 b
->number
, addrbuf
, /* address */
12470 is_first
? "S" : "",
12471 action_it
->c_str (),
12472 has_more
? "-" : "");
12474 remote_get_noisy_reply ();
12475 if (strcmp (rs
->buf
, "OK"))
12476 error (_("Error on target while setting tracepoints."));
12479 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
12481 if (b
->location
!= NULL
)
12483 strcpy (buf
, "QTDPsrc:");
12484 encode_source_string (b
->number
, loc
->address
, "at",
12485 event_location_to_string (b
->location
.get ()),
12486 buf
+ strlen (buf
), 2048 - strlen (buf
));
12488 remote_get_noisy_reply ();
12489 if (strcmp (rs
->buf
, "OK"))
12490 warning (_("Target does not support source download."));
12492 if (b
->cond_string
)
12494 strcpy (buf
, "QTDPsrc:");
12495 encode_source_string (b
->number
, loc
->address
,
12496 "cond", b
->cond_string
, buf
+ strlen (buf
),
12497 2048 - strlen (buf
));
12499 remote_get_noisy_reply ();
12500 if (strcmp (rs
->buf
, "OK"))
12501 warning (_("Target does not support source download."));
12503 remote_download_command_source (b
->number
, loc
->address
,
12504 breakpoint_commands (b
));
12509 remote_can_download_tracepoint (struct target_ops
*self
)
12511 struct remote_state
*rs
= get_remote_state ();
12512 struct trace_status
*ts
;
12515 /* Don't try to install tracepoints until we've relocated our
12516 symbols, and fetched and merged the target's tracepoint list with
12518 if (rs
->starting_up
)
12521 ts
= current_trace_status ();
12522 status
= remote_get_trace_status (self
, ts
);
12524 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
12527 /* If we are in a tracing experiment, but remote stub doesn't support
12528 installing tracepoint in trace, we have to return. */
12529 if (!remote_supports_install_in_trace ())
12537 remote_download_trace_state_variable (struct target_ops
*self
,
12538 struct trace_state_variable
*tsv
)
12540 struct remote_state
*rs
= get_remote_state ();
12543 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12544 tsv
->number
, phex ((ULONGEST
) tsv
->initial_value
, 8),
12546 p
= rs
->buf
+ strlen (rs
->buf
);
12547 if ((p
- rs
->buf
) + strlen (tsv
->name
) * 2 >= get_remote_packet_size ())
12548 error (_("Trace state variable name too long for tsv definition packet"));
12549 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
->name
), p
, strlen (tsv
->name
));
12552 remote_get_noisy_reply ();
12553 if (*rs
->buf
== '\0')
12554 error (_("Target does not support this command."));
12555 if (strcmp (rs
->buf
, "OK") != 0)
12556 error (_("Error on target while downloading trace state variable."));
12560 remote_enable_tracepoint (struct target_ops
*self
,
12561 struct bp_location
*location
)
12563 struct remote_state
*rs
= get_remote_state ();
12566 sprintf_vma (addr_buf
, location
->address
);
12567 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTEnable:%x:%s",
12568 location
->owner
->number
, addr_buf
);
12570 remote_get_noisy_reply ();
12571 if (*rs
->buf
== '\0')
12572 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12573 if (strcmp (rs
->buf
, "OK") != 0)
12574 error (_("Error on target while enabling tracepoint."));
12578 remote_disable_tracepoint (struct target_ops
*self
,
12579 struct bp_location
*location
)
12581 struct remote_state
*rs
= get_remote_state ();
12584 sprintf_vma (addr_buf
, location
->address
);
12585 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisable:%x:%s",
12586 location
->owner
->number
, addr_buf
);
12588 remote_get_noisy_reply ();
12589 if (*rs
->buf
== '\0')
12590 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12591 if (strcmp (rs
->buf
, "OK") != 0)
12592 error (_("Error on target while disabling tracepoint."));
12596 remote_trace_set_readonly_regions (struct target_ops
*self
)
12600 bfd_size_type size
;
12606 return; /* No information to give. */
12608 struct remote_state
*rs
= get_remote_state ();
12610 strcpy (rs
->buf
, "QTro");
12611 offset
= strlen (rs
->buf
);
12612 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
12614 char tmp1
[40], tmp2
[40];
12617 if ((s
->flags
& SEC_LOAD
) == 0 ||
12618 /* (s->flags & SEC_CODE) == 0 || */
12619 (s
->flags
& SEC_READONLY
) == 0)
12623 vma
= bfd_get_section_vma (abfd
, s
);
12624 size
= bfd_get_section_size (s
);
12625 sprintf_vma (tmp1
, vma
);
12626 sprintf_vma (tmp2
, vma
+ size
);
12627 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
12628 if (offset
+ sec_length
+ 1 > rs
->buf_size
)
12630 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
12632 Too many sections for read-only sections definition packet."));
12635 xsnprintf (rs
->buf
+ offset
, rs
->buf_size
- offset
, ":%s,%s",
12637 offset
+= sec_length
;
12642 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12647 remote_trace_start (struct target_ops
*self
)
12649 struct remote_state
*rs
= get_remote_state ();
12651 putpkt ("QTStart");
12652 remote_get_noisy_reply ();
12653 if (*rs
->buf
== '\0')
12654 error (_("Target does not support this command."));
12655 if (strcmp (rs
->buf
, "OK") != 0)
12656 error (_("Bogus reply from target: %s"), rs
->buf
);
12660 remote_get_trace_status (struct target_ops
*self
, struct trace_status
*ts
)
12662 /* Initialize it just to avoid a GCC false warning. */
12664 /* FIXME we need to get register block size some other way. */
12665 extern int trace_regblock_size
;
12666 enum packet_result result
;
12667 struct remote_state
*rs
= get_remote_state ();
12669 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
12672 trace_regblock_size
12673 = get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
12675 putpkt ("qTStatus");
12679 p
= remote_get_noisy_reply ();
12681 CATCH (ex
, RETURN_MASK_ERROR
)
12683 if (ex
.error
!= TARGET_CLOSE_ERROR
)
12685 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
12688 throw_exception (ex
);
12692 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
12694 /* If the remote target doesn't do tracing, flag it. */
12695 if (result
== PACKET_UNKNOWN
)
12698 /* We're working with a live target. */
12699 ts
->filename
= NULL
;
12702 error (_("Bogus trace status reply from target: %s"), rs
->buf
);
12704 /* Function 'parse_trace_status' sets default value of each field of
12705 'ts' at first, so we don't have to do it here. */
12706 parse_trace_status (p
, ts
);
12708 return ts
->running
;
12712 remote_get_tracepoint_status (struct target_ops
*self
, struct breakpoint
*bp
,
12713 struct uploaded_tp
*utp
)
12715 struct remote_state
*rs
= get_remote_state ();
12717 struct bp_location
*loc
;
12718 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
12719 size_t size
= get_remote_packet_size ();
12724 tp
->traceframe_usage
= 0;
12725 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
12727 /* If the tracepoint was never downloaded, don't go asking for
12729 if (tp
->number_on_target
== 0)
12731 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", tp
->number_on_target
,
12732 phex_nz (loc
->address
, 0));
12734 reply
= remote_get_noisy_reply ();
12735 if (reply
&& *reply
)
12738 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12744 utp
->hit_count
= 0;
12745 utp
->traceframe_usage
= 0;
12746 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", utp
->number
,
12747 phex_nz (utp
->addr
, 0));
12749 reply
= remote_get_noisy_reply ();
12750 if (reply
&& *reply
)
12753 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12759 remote_trace_stop (struct target_ops
*self
)
12761 struct remote_state
*rs
= get_remote_state ();
12764 remote_get_noisy_reply ();
12765 if (*rs
->buf
== '\0')
12766 error (_("Target does not support this command."));
12767 if (strcmp (rs
->buf
, "OK") != 0)
12768 error (_("Bogus reply from target: %s"), rs
->buf
);
12772 remote_trace_find (struct target_ops
*self
,
12773 enum trace_find_type type
, int num
,
12774 CORE_ADDR addr1
, CORE_ADDR addr2
,
12777 struct remote_state
*rs
= get_remote_state ();
12778 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12780 int target_frameno
= -1, target_tracept
= -1;
12782 /* Lookups other than by absolute frame number depend on the current
12783 trace selected, so make sure it is correct on the remote end
12785 if (type
!= tfind_number
)
12786 set_remote_traceframe ();
12789 strcpy (p
, "QTFrame:");
12790 p
= strchr (p
, '\0');
12794 xsnprintf (p
, endbuf
- p
, "%x", num
);
12797 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
12800 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
12803 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
12804 phex_nz (addr2
, 0));
12806 case tfind_outside
:
12807 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
12808 phex_nz (addr2
, 0));
12811 error (_("Unknown trace find type %d"), type
);
12815 reply
= remote_get_noisy_reply ();
12816 if (*reply
== '\0')
12817 error (_("Target does not support this command."));
12819 while (reply
&& *reply
)
12824 target_frameno
= (int) strtol (p
, &reply
, 16);
12826 error (_("Unable to parse trace frame number"));
12827 /* Don't update our remote traceframe number cache on failure
12828 to select a remote traceframe. */
12829 if (target_frameno
== -1)
12834 target_tracept
= (int) strtol (p
, &reply
, 16);
12836 error (_("Unable to parse tracepoint number"));
12838 case 'O': /* "OK"? */
12839 if (reply
[1] == 'K' && reply
[2] == '\0')
12842 error (_("Bogus reply from target: %s"), reply
);
12845 error (_("Bogus reply from target: %s"), reply
);
12848 *tpp
= target_tracept
;
12850 rs
->remote_traceframe_number
= target_frameno
;
12851 return target_frameno
;
12855 remote_get_trace_state_variable_value (struct target_ops
*self
,
12856 int tsvnum
, LONGEST
*val
)
12858 struct remote_state
*rs
= get_remote_state ();
12862 set_remote_traceframe ();
12864 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTV:%x", tsvnum
);
12866 reply
= remote_get_noisy_reply ();
12867 if (reply
&& *reply
)
12871 unpack_varlen_hex (reply
+ 1, &uval
);
12872 *val
= (LONGEST
) uval
;
12880 remote_save_trace_data (struct target_ops
*self
, const char *filename
)
12882 struct remote_state
*rs
= get_remote_state ();
12886 strcpy (p
, "QTSave:");
12888 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
12889 error (_("Remote file name too long for trace save packet"));
12890 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
12893 reply
= remote_get_noisy_reply ();
12894 if (*reply
== '\0')
12895 error (_("Target does not support this command."));
12896 if (strcmp (reply
, "OK") != 0)
12897 error (_("Bogus reply from target: %s"), reply
);
12901 /* This is basically a memory transfer, but needs to be its own packet
12902 because we don't know how the target actually organizes its trace
12903 memory, plus we want to be able to ask for as much as possible, but
12904 not be unhappy if we don't get as much as we ask for. */
12907 remote_get_raw_trace_data (struct target_ops
*self
,
12908 gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
12910 struct remote_state
*rs
= get_remote_state ();
12916 strcpy (p
, "qTBuffer:");
12918 p
+= hexnumstr (p
, offset
);
12920 p
+= hexnumstr (p
, len
);
12924 reply
= remote_get_noisy_reply ();
12925 if (reply
&& *reply
)
12927 /* 'l' by itself means we're at the end of the buffer and
12928 there is nothing more to get. */
12932 /* Convert the reply into binary. Limit the number of bytes to
12933 convert according to our passed-in buffer size, rather than
12934 what was returned in the packet; if the target is
12935 unexpectedly generous and gives us a bigger reply than we
12936 asked for, we don't want to crash. */
12937 rslt
= hex2bin (reply
, buf
, len
);
12941 /* Something went wrong, flag as an error. */
12946 remote_set_disconnected_tracing (struct target_ops
*self
, int val
)
12948 struct remote_state
*rs
= get_remote_state ();
12950 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
12954 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisconnected:%x", val
);
12956 reply
= remote_get_noisy_reply ();
12957 if (*reply
== '\0')
12958 error (_("Target does not support this command."));
12959 if (strcmp (reply
, "OK") != 0)
12960 error (_("Bogus reply from target: %s"), reply
);
12963 warning (_("Target does not support disconnected tracing."));
12967 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
12969 struct thread_info
*info
= find_thread_ptid (ptid
);
12971 if (info
&& info
->priv
)
12972 return info
->priv
->core
;
12977 remote_set_circular_trace_buffer (struct target_ops
*self
, int val
)
12979 struct remote_state
*rs
= get_remote_state ();
12982 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTBuffer:circular:%x", val
);
12984 reply
= remote_get_noisy_reply ();
12985 if (*reply
== '\0')
12986 error (_("Target does not support this command."));
12987 if (strcmp (reply
, "OK") != 0)
12988 error (_("Bogus reply from target: %s"), reply
);
12991 static traceframe_info_up
12992 remote_traceframe_info (struct target_ops
*self
)
12994 gdb::unique_xmalloc_ptr
<char> text
12995 = target_read_stralloc (¤t_target
, TARGET_OBJECT_TRACEFRAME_INFO
,
12998 return parse_traceframe_info (text
.get ());
13003 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13004 instruction on which a fast tracepoint may be placed. Returns -1
13005 if the packet is not supported, and 0 if the minimum instruction
13006 length is unknown. */
13009 remote_get_min_fast_tracepoint_insn_len (struct target_ops
*self
)
13011 struct remote_state
*rs
= get_remote_state ();
13014 /* If we're not debugging a process yet, the IPA can't be
13016 if (!target_has_execution
)
13019 /* Make sure the remote is pointing at the right process. */
13020 set_general_process ();
13022 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTMinFTPILen");
13024 reply
= remote_get_noisy_reply ();
13025 if (*reply
== '\0')
13029 ULONGEST min_insn_len
;
13031 unpack_varlen_hex (reply
, &min_insn_len
);
13033 return (int) min_insn_len
;
13038 remote_set_trace_buffer_size (struct target_ops
*self
, LONGEST val
)
13040 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13042 struct remote_state
*rs
= get_remote_state ();
13043 char *buf
= rs
->buf
;
13044 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13045 enum packet_result result
;
13047 gdb_assert (val
>= 0 || val
== -1);
13048 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13049 /* Send -1 as literal "-1" to avoid host size dependency. */
13053 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13056 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13059 remote_get_noisy_reply ();
13060 result
= packet_ok (rs
->buf
,
13061 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13063 if (result
!= PACKET_OK
)
13064 warning (_("Bogus reply from target: %s"), rs
->buf
);
13069 remote_set_trace_notes (struct target_ops
*self
,
13070 const char *user
, const char *notes
,
13071 const char *stop_notes
)
13073 struct remote_state
*rs
= get_remote_state ();
13075 char *buf
= rs
->buf
;
13076 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13079 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13082 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13083 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13089 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13090 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13096 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13097 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13101 /* Ensure the buffer is terminated. */
13105 reply
= remote_get_noisy_reply ();
13106 if (*reply
== '\0')
13109 if (strcmp (reply
, "OK") != 0)
13110 error (_("Bogus reply from target: %s"), reply
);
13116 remote_use_agent (struct target_ops
*self
, int use
)
13118 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13120 struct remote_state
*rs
= get_remote_state ();
13122 /* If the stub supports QAgent. */
13123 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAgent:%d", use
);
13125 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13127 if (strcmp (rs
->buf
, "OK") == 0)
13138 remote_can_use_agent (struct target_ops
*self
)
13140 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13143 struct btrace_target_info
13145 /* The ptid of the traced thread. */
13148 /* The obtained branch trace configuration. */
13149 struct btrace_config conf
;
13152 /* Reset our idea of our target's btrace configuration. */
13155 remote_btrace_reset (void)
13157 struct remote_state
*rs
= get_remote_state ();
13159 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13162 /* Check whether the target supports branch tracing. */
13165 remote_supports_btrace (struct target_ops
*self
, enum btrace_format format
)
13167 if (packet_support (PACKET_Qbtrace_off
) != PACKET_ENABLE
)
13169 if (packet_support (PACKET_qXfer_btrace
) != PACKET_ENABLE
)
13174 case BTRACE_FORMAT_NONE
:
13177 case BTRACE_FORMAT_BTS
:
13178 return (packet_support (PACKET_Qbtrace_bts
) == PACKET_ENABLE
);
13180 case BTRACE_FORMAT_PT
:
13181 /* The trace is decoded on the host. Even if our target supports it,
13182 we still need to have libipt to decode the trace. */
13183 #if defined (HAVE_LIBIPT)
13184 return (packet_support (PACKET_Qbtrace_pt
) == PACKET_ENABLE
);
13185 #else /* !defined (HAVE_LIBIPT) */
13187 #endif /* !defined (HAVE_LIBIPT) */
13190 internal_error (__FILE__
, __LINE__
, _("Unknown branch trace format"));
13193 /* Synchronize the configuration with the target. */
13196 btrace_sync_conf (const struct btrace_config
*conf
)
13198 struct packet_config
*packet
;
13199 struct remote_state
*rs
;
13200 char *buf
, *pos
, *endbuf
;
13202 rs
= get_remote_state ();
13204 endbuf
= buf
+ get_remote_packet_size ();
13206 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13207 if (packet_config_support (packet
) == PACKET_ENABLE
13208 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13211 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13215 getpkt (&buf
, &rs
->buf_size
, 0);
13217 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13219 if (buf
[0] == 'E' && buf
[1] == '.')
13220 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13222 error (_("Failed to configure the BTS buffer size."));
13225 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13228 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13229 if (packet_config_support (packet
) == PACKET_ENABLE
13230 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13233 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13237 getpkt (&buf
, &rs
->buf_size
, 0);
13239 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13241 if (buf
[0] == 'E' && buf
[1] == '.')
13242 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13244 error (_("Failed to configure the trace buffer size."));
13247 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13251 /* Read the current thread's btrace configuration from the target and
13252 store it into CONF. */
13255 btrace_read_config (struct btrace_config
*conf
)
13257 gdb::unique_xmalloc_ptr
<char> xml
13258 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE_CONF
, "");
13260 parse_xml_btrace_conf (conf
, xml
.get ());
13263 /* Maybe reopen target btrace. */
13266 remote_btrace_maybe_reopen (void)
13268 struct remote_state
*rs
= get_remote_state ();
13269 struct thread_info
*tp
;
13270 int btrace_target_pushed
= 0;
13273 scoped_restore_current_thread restore_thread
;
13275 ALL_NON_EXITED_THREADS (tp
)
13277 set_general_thread (tp
->ptid
);
13279 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13280 btrace_read_config (&rs
->btrace_config
);
13282 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13285 #if !defined (HAVE_LIBIPT)
13286 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13291 warning (_("GDB does not support Intel Processor Trace. "
13292 "\"record\" will not work in this session."));
13297 #endif /* !defined (HAVE_LIBIPT) */
13299 /* Push target, once, but before anything else happens. This way our
13300 changes to the threads will be cleaned up by unpushing the target
13301 in case btrace_read_config () throws. */
13302 if (!btrace_target_pushed
)
13304 btrace_target_pushed
= 1;
13305 record_btrace_push_target ();
13306 printf_filtered (_("Target is recording using %s.\n"),
13307 btrace_format_string (rs
->btrace_config
.format
));
13310 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13311 tp
->btrace
.target
->ptid
= tp
->ptid
;
13312 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13316 /* Enable branch tracing. */
13318 static struct btrace_target_info
*
13319 remote_enable_btrace (struct target_ops
*self
, ptid_t ptid
,
13320 const struct btrace_config
*conf
)
13322 struct btrace_target_info
*tinfo
= NULL
;
13323 struct packet_config
*packet
= NULL
;
13324 struct remote_state
*rs
= get_remote_state ();
13325 char *buf
= rs
->buf
;
13326 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13328 switch (conf
->format
)
13330 case BTRACE_FORMAT_BTS
:
13331 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13334 case BTRACE_FORMAT_PT
:
13335 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13339 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13340 error (_("Target does not support branch tracing."));
13342 btrace_sync_conf (conf
);
13344 set_general_thread (ptid
);
13346 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13348 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13350 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13352 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13353 error (_("Could not enable branch tracing for %s: %s"),
13354 target_pid_to_str (ptid
), rs
->buf
+ 2);
13356 error (_("Could not enable branch tracing for %s."),
13357 target_pid_to_str (ptid
));
13360 tinfo
= XCNEW (struct btrace_target_info
);
13361 tinfo
->ptid
= ptid
;
13363 /* If we fail to read the configuration, we lose some information, but the
13364 tracing itself is not impacted. */
13367 btrace_read_config (&tinfo
->conf
);
13369 CATCH (err
, RETURN_MASK_ERROR
)
13371 if (err
.message
!= NULL
)
13372 warning ("%s", err
.message
);
13379 /* Disable branch tracing. */
13382 remote_disable_btrace (struct target_ops
*self
,
13383 struct btrace_target_info
*tinfo
)
13385 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13386 struct remote_state
*rs
= get_remote_state ();
13387 char *buf
= rs
->buf
;
13388 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13390 if (packet_config_support (packet
) != PACKET_ENABLE
)
13391 error (_("Target does not support branch tracing."));
13393 set_general_thread (tinfo
->ptid
);
13395 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13397 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13399 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13401 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13402 error (_("Could not disable branch tracing for %s: %s"),
13403 target_pid_to_str (tinfo
->ptid
), rs
->buf
+ 2);
13405 error (_("Could not disable branch tracing for %s."),
13406 target_pid_to_str (tinfo
->ptid
));
13412 /* Teardown branch tracing. */
13415 remote_teardown_btrace (struct target_ops
*self
,
13416 struct btrace_target_info
*tinfo
)
13418 /* We must not talk to the target during teardown. */
13422 /* Read the branch trace. */
13424 static enum btrace_error
13425 remote_read_btrace (struct target_ops
*self
,
13426 struct btrace_data
*btrace
,
13427 struct btrace_target_info
*tinfo
,
13428 enum btrace_read_type type
)
13430 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13433 if (packet_config_support (packet
) != PACKET_ENABLE
)
13434 error (_("Target does not support branch tracing."));
13436 #if !defined(HAVE_LIBEXPAT)
13437 error (_("Cannot process branch tracing result. XML parsing not supported."));
13442 case BTRACE_READ_ALL
:
13445 case BTRACE_READ_NEW
:
13448 case BTRACE_READ_DELTA
:
13452 internal_error (__FILE__
, __LINE__
,
13453 _("Bad branch tracing read type: %u."),
13454 (unsigned int) type
);
13457 gdb::unique_xmalloc_ptr
<char> xml
13458 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE
, annex
);
13460 return BTRACE_ERR_UNKNOWN
;
13462 parse_xml_btrace (btrace
, xml
.get ());
13464 return BTRACE_ERR_NONE
;
13467 static const struct btrace_config
*
13468 remote_btrace_conf (struct target_ops
*self
,
13469 const struct btrace_target_info
*tinfo
)
13471 return &tinfo
->conf
;
13475 remote_augmented_libraries_svr4_read (struct target_ops
*self
)
13477 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
13481 /* Implementation of to_load. */
13484 remote_load (struct target_ops
*self
, const char *name
, int from_tty
)
13486 generic_load (name
, from_tty
);
13489 /* Accepts an integer PID; returns a string representing a file that
13490 can be opened on the remote side to get the symbols for the child
13491 process. Returns NULL if the operation is not supported. */
13494 remote_pid_to_exec_file (struct target_ops
*self
, int pid
)
13496 static gdb::unique_xmalloc_ptr
<char> filename
;
13497 struct inferior
*inf
;
13498 char *annex
= NULL
;
13500 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
13503 inf
= find_inferior_pid (pid
);
13505 internal_error (__FILE__
, __LINE__
,
13506 _("not currently attached to process %d"), pid
);
13508 if (!inf
->fake_pid_p
)
13510 const int annex_size
= 9;
13512 annex
= (char *) alloca (annex_size
);
13513 xsnprintf (annex
, annex_size
, "%x", pid
);
13516 filename
= target_read_stralloc (¤t_target
,
13517 TARGET_OBJECT_EXEC_FILE
, annex
);
13519 return filename
.get ();
13522 /* Implement the to_can_do_single_step target_ops method. */
13525 remote_can_do_single_step (struct target_ops
*ops
)
13527 /* We can only tell whether target supports single step or not by
13528 supported s and S vCont actions if the stub supports vContSupported
13529 feature. If the stub doesn't support vContSupported feature,
13530 we have conservatively to think target doesn't supports single
13532 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
13534 struct remote_state
*rs
= get_remote_state ();
13536 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13537 remote_vcont_probe (rs
);
13539 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
13545 /* Implementation of the to_execution_direction method for the remote
13548 static enum exec_direction_kind
13549 remote_execution_direction (struct target_ops
*self
)
13551 struct remote_state
*rs
= get_remote_state ();
13553 return rs
->last_resume_exec_dir
;
13556 /* Return pointer to the thread_info struct which corresponds to
13557 THREAD_HANDLE (having length HANDLE_LEN). */
13559 static struct thread_info
*
13560 remote_thread_handle_to_thread_info (struct target_ops
*ops
,
13561 const gdb_byte
*thread_handle
,
13563 struct inferior
*inf
)
13565 struct thread_info
*tp
;
13567 ALL_NON_EXITED_THREADS (tp
)
13569 struct private_thread_info
*priv
= get_private_info_thread (tp
);
13571 if (tp
->inf
== inf
&& priv
!= NULL
)
13573 if (handle_len
!= priv
->thread_handle
->size ())
13574 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
13575 handle_len
, priv
->thread_handle
->size ());
13576 if (memcmp (thread_handle
, priv
->thread_handle
->data (),
13586 init_remote_ops (void)
13588 remote_ops
.to_shortname
= "remote";
13589 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
13590 remote_ops
.to_doc
=
13591 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13592 Specify the serial device it is connected to\n\
13593 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13594 remote_ops
.to_open
= remote_open
;
13595 remote_ops
.to_close
= remote_close
;
13596 remote_ops
.to_detach
= remote_detach
;
13597 remote_ops
.to_disconnect
= remote_disconnect
;
13598 remote_ops
.to_resume
= remote_resume
;
13599 remote_ops
.to_commit_resume
= remote_commit_resume
;
13600 remote_ops
.to_wait
= remote_wait
;
13601 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
13602 remote_ops
.to_store_registers
= remote_store_registers
;
13603 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
13604 remote_ops
.to_files_info
= remote_files_info
;
13605 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
13606 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
13607 remote_ops
.to_stopped_by_sw_breakpoint
= remote_stopped_by_sw_breakpoint
;
13608 remote_ops
.to_supports_stopped_by_sw_breakpoint
= remote_supports_stopped_by_sw_breakpoint
;
13609 remote_ops
.to_stopped_by_hw_breakpoint
= remote_stopped_by_hw_breakpoint
;
13610 remote_ops
.to_supports_stopped_by_hw_breakpoint
= remote_supports_stopped_by_hw_breakpoint
;
13611 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
13612 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
13613 remote_ops
.to_watchpoint_addr_within_range
=
13614 remote_watchpoint_addr_within_range
;
13615 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
13616 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
13617 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
13618 remote_ops
.to_region_ok_for_hw_watchpoint
13619 = remote_region_ok_for_hw_watchpoint
;
13620 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
13621 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
13622 remote_ops
.to_kill
= remote_kill
;
13623 remote_ops
.to_load
= remote_load
;
13624 remote_ops
.to_mourn_inferior
= remote_mourn
;
13625 remote_ops
.to_pass_signals
= remote_pass_signals
;
13626 remote_ops
.to_set_syscall_catchpoint
= remote_set_syscall_catchpoint
;
13627 remote_ops
.to_program_signals
= remote_program_signals
;
13628 remote_ops
.to_thread_alive
= remote_thread_alive
;
13629 remote_ops
.to_thread_name
= remote_thread_name
;
13630 remote_ops
.to_update_thread_list
= remote_update_thread_list
;
13631 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
13632 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
13633 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
13634 remote_ops
.to_stop
= remote_stop
;
13635 remote_ops
.to_interrupt
= remote_interrupt
;
13636 remote_ops
.to_pass_ctrlc
= remote_pass_ctrlc
;
13637 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
13638 remote_ops
.to_get_memory_xfer_limit
= remote_get_memory_xfer_limit
;
13639 remote_ops
.to_rcmd
= remote_rcmd
;
13640 remote_ops
.to_pid_to_exec_file
= remote_pid_to_exec_file
;
13641 remote_ops
.to_log_command
= serial_log_command
;
13642 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
13643 remote_ops
.to_stratum
= process_stratum
;
13644 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
13645 remote_ops
.to_has_memory
= default_child_has_memory
;
13646 remote_ops
.to_has_stack
= default_child_has_stack
;
13647 remote_ops
.to_has_registers
= default_child_has_registers
;
13648 remote_ops
.to_has_execution
= default_child_has_execution
;
13649 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
13650 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
13651 remote_ops
.to_magic
= OPS_MAGIC
;
13652 remote_ops
.to_memory_map
= remote_memory_map
;
13653 remote_ops
.to_flash_erase
= remote_flash_erase
;
13654 remote_ops
.to_flash_done
= remote_flash_done
;
13655 remote_ops
.to_read_description
= remote_read_description
;
13656 remote_ops
.to_search_memory
= remote_search_memory
;
13657 remote_ops
.to_can_async_p
= remote_can_async_p
;
13658 remote_ops
.to_is_async_p
= remote_is_async_p
;
13659 remote_ops
.to_async
= remote_async
;
13660 remote_ops
.to_thread_events
= remote_thread_events
;
13661 remote_ops
.to_can_do_single_step
= remote_can_do_single_step
;
13662 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
13663 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
13664 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
13665 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
13666 remote_ops
.to_supports_disable_randomization
13667 = remote_supports_disable_randomization
;
13668 remote_ops
.to_filesystem_is_local
= remote_filesystem_is_local
;
13669 remote_ops
.to_fileio_open
= remote_hostio_open
;
13670 remote_ops
.to_fileio_pwrite
= remote_hostio_pwrite
;
13671 remote_ops
.to_fileio_pread
= remote_hostio_pread
;
13672 remote_ops
.to_fileio_fstat
= remote_hostio_fstat
;
13673 remote_ops
.to_fileio_close
= remote_hostio_close
;
13674 remote_ops
.to_fileio_unlink
= remote_hostio_unlink
;
13675 remote_ops
.to_fileio_readlink
= remote_hostio_readlink
;
13676 remote_ops
.to_supports_enable_disable_tracepoint
= remote_supports_enable_disable_tracepoint
;
13677 remote_ops
.to_supports_string_tracing
= remote_supports_string_tracing
;
13678 remote_ops
.to_supports_evaluation_of_breakpoint_conditions
= remote_supports_cond_breakpoints
;
13679 remote_ops
.to_can_run_breakpoint_commands
= remote_can_run_breakpoint_commands
;
13680 remote_ops
.to_trace_init
= remote_trace_init
;
13681 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
13682 remote_ops
.to_can_download_tracepoint
= remote_can_download_tracepoint
;
13683 remote_ops
.to_download_trace_state_variable
13684 = remote_download_trace_state_variable
;
13685 remote_ops
.to_enable_tracepoint
= remote_enable_tracepoint
;
13686 remote_ops
.to_disable_tracepoint
= remote_disable_tracepoint
;
13687 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
13688 remote_ops
.to_trace_start
= remote_trace_start
;
13689 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
13690 remote_ops
.to_get_tracepoint_status
= remote_get_tracepoint_status
;
13691 remote_ops
.to_trace_stop
= remote_trace_stop
;
13692 remote_ops
.to_trace_find
= remote_trace_find
;
13693 remote_ops
.to_get_trace_state_variable_value
13694 = remote_get_trace_state_variable_value
;
13695 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
13696 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
13697 remote_ops
.to_upload_trace_state_variables
13698 = remote_upload_trace_state_variables
;
13699 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
13700 remote_ops
.to_get_min_fast_tracepoint_insn_len
= remote_get_min_fast_tracepoint_insn_len
;
13701 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
13702 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
13703 remote_ops
.to_set_trace_buffer_size
= remote_set_trace_buffer_size
;
13704 remote_ops
.to_set_trace_notes
= remote_set_trace_notes
;
13705 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
13706 remote_ops
.to_verify_memory
= remote_verify_memory
;
13707 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
13708 remote_ops
.to_set_permissions
= remote_set_permissions
;
13709 remote_ops
.to_static_tracepoint_marker_at
13710 = remote_static_tracepoint_marker_at
;
13711 remote_ops
.to_static_tracepoint_markers_by_strid
13712 = remote_static_tracepoint_markers_by_strid
;
13713 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
13714 remote_ops
.to_use_agent
= remote_use_agent
;
13715 remote_ops
.to_can_use_agent
= remote_can_use_agent
;
13716 remote_ops
.to_supports_btrace
= remote_supports_btrace
;
13717 remote_ops
.to_enable_btrace
= remote_enable_btrace
;
13718 remote_ops
.to_disable_btrace
= remote_disable_btrace
;
13719 remote_ops
.to_teardown_btrace
= remote_teardown_btrace
;
13720 remote_ops
.to_read_btrace
= remote_read_btrace
;
13721 remote_ops
.to_btrace_conf
= remote_btrace_conf
;
13722 remote_ops
.to_augmented_libraries_svr4_read
=
13723 remote_augmented_libraries_svr4_read
;
13724 remote_ops
.to_follow_fork
= remote_follow_fork
;
13725 remote_ops
.to_follow_exec
= remote_follow_exec
;
13726 remote_ops
.to_insert_fork_catchpoint
= remote_insert_fork_catchpoint
;
13727 remote_ops
.to_remove_fork_catchpoint
= remote_remove_fork_catchpoint
;
13728 remote_ops
.to_insert_vfork_catchpoint
= remote_insert_vfork_catchpoint
;
13729 remote_ops
.to_remove_vfork_catchpoint
= remote_remove_vfork_catchpoint
;
13730 remote_ops
.to_insert_exec_catchpoint
= remote_insert_exec_catchpoint
;
13731 remote_ops
.to_remove_exec_catchpoint
= remote_remove_exec_catchpoint
;
13732 remote_ops
.to_execution_direction
= remote_execution_direction
;
13733 remote_ops
.to_thread_handle_to_thread_info
=
13734 remote_thread_handle_to_thread_info
;
13737 /* Set up the extended remote vector by making a copy of the standard
13738 remote vector and adding to it. */
13741 init_extended_remote_ops (void)
13743 extended_remote_ops
= remote_ops
;
13745 extended_remote_ops
.to_shortname
= "extended-remote";
13746 extended_remote_ops
.to_longname
=
13747 "Extended remote serial target in gdb-specific protocol";
13748 extended_remote_ops
.to_doc
=
13749 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13750 Specify the serial device it is connected to (e.g. /dev/ttya).";
13751 extended_remote_ops
.to_open
= extended_remote_open
;
13752 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
13753 extended_remote_ops
.to_detach
= extended_remote_detach
;
13754 extended_remote_ops
.to_attach
= extended_remote_attach
;
13755 extended_remote_ops
.to_post_attach
= extended_remote_post_attach
;
13756 extended_remote_ops
.to_supports_disable_randomization
13757 = extended_remote_supports_disable_randomization
;
13761 remote_can_async_p (struct target_ops
*ops
)
13763 struct remote_state
*rs
= get_remote_state ();
13765 /* We don't go async if the user has explicitly prevented it with the
13766 "maint set target-async" command. */
13767 if (!target_async_permitted
)
13770 /* We're async whenever the serial device is. */
13771 return serial_can_async_p (rs
->remote_desc
);
13775 remote_is_async_p (struct target_ops
*ops
)
13777 struct remote_state
*rs
= get_remote_state ();
13779 if (!target_async_permitted
)
13780 /* We only enable async when the user specifically asks for it. */
13783 /* We're async whenever the serial device is. */
13784 return serial_is_async_p (rs
->remote_desc
);
13787 /* Pass the SERIAL event on and up to the client. One day this code
13788 will be able to delay notifying the client of an event until the
13789 point where an entire packet has been received. */
13791 static serial_event_ftype remote_async_serial_handler
;
13794 remote_async_serial_handler (struct serial
*scb
, void *context
)
13796 /* Don't propogate error information up to the client. Instead let
13797 the client find out about the error by querying the target. */
13798 inferior_event_handler (INF_REG_EVENT
, NULL
);
13802 remote_async_inferior_event_handler (gdb_client_data data
)
13804 inferior_event_handler (INF_REG_EVENT
, NULL
);
13808 remote_async (struct target_ops
*ops
, int enable
)
13810 struct remote_state
*rs
= get_remote_state ();
13814 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
13816 /* If there are pending events in the stop reply queue tell the
13817 event loop to process them. */
13818 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
13819 mark_async_event_handler (remote_async_inferior_event_token
);
13820 /* For simplicity, below we clear the pending events token
13821 without remembering whether it is marked, so here we always
13822 mark it. If there's actually no pending notification to
13823 process, this ends up being a no-op (other than a spurious
13824 event-loop wakeup). */
13825 if (target_is_non_stop_p ())
13826 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13830 serial_async (rs
->remote_desc
, NULL
, NULL
);
13831 /* If the core is disabling async, it doesn't want to be
13832 disturbed with target events. Clear all async event sources
13834 clear_async_event_handler (remote_async_inferior_event_token
);
13835 if (target_is_non_stop_p ())
13836 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13840 /* Implementation of the to_thread_events method. */
13843 remote_thread_events (struct target_ops
*ops
, int enable
)
13845 struct remote_state
*rs
= get_remote_state ();
13846 size_t size
= get_remote_packet_size ();
13848 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
13851 xsnprintf (rs
->buf
, size
, "QThreadEvents:%x", enable
? 1 : 0);
13853 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13855 switch (packet_ok (rs
->buf
,
13856 &remote_protocol_packets
[PACKET_QThreadEvents
]))
13859 if (strcmp (rs
->buf
, "OK") != 0)
13860 error (_("Remote refused setting thread events: %s"), rs
->buf
);
13863 warning (_("Remote failure reply: %s"), rs
->buf
);
13865 case PACKET_UNKNOWN
:
13871 set_remote_cmd (const char *args
, int from_tty
)
13873 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
13877 show_remote_cmd (const char *args
, int from_tty
)
13879 /* We can't just use cmd_show_list here, because we want to skip
13880 the redundant "show remote Z-packet" and the legacy aliases. */
13881 struct cmd_list_element
*list
= remote_show_cmdlist
;
13882 struct ui_out
*uiout
= current_uiout
;
13884 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
13885 for (; list
!= NULL
; list
= list
->next
)
13886 if (strcmp (list
->name
, "Z-packet") == 0)
13888 else if (list
->type
== not_set_cmd
)
13889 /* Alias commands are exactly like the original, except they
13890 don't have the normal type. */
13894 ui_out_emit_tuple
option_emitter (uiout
, "option");
13896 uiout
->field_string ("name", list
->name
);
13897 uiout
->text (": ");
13898 if (list
->type
== show_cmd
)
13899 do_show_command (NULL
, from_tty
, list
);
13901 cmd_func (list
, NULL
, from_tty
);
13906 /* Function to be called whenever a new objfile (shlib) is detected. */
13908 remote_new_objfile (struct objfile
*objfile
)
13910 struct remote_state
*rs
= get_remote_state ();
13912 if (rs
->remote_desc
!= 0) /* Have a remote connection. */
13913 remote_check_symbols ();
13916 /* Pull all the tracepoints defined on the target and create local
13917 data structures representing them. We don't want to create real
13918 tracepoints yet, we don't want to mess up the user's existing
13922 remote_upload_tracepoints (struct target_ops
*self
, struct uploaded_tp
**utpp
)
13924 struct remote_state
*rs
= get_remote_state ();
13927 /* Ask for a first packet of tracepoint definition. */
13929 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13931 while (*p
&& *p
!= 'l')
13933 parse_tracepoint_definition (p
, utpp
);
13934 /* Ask for another packet of tracepoint definition. */
13936 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13943 remote_upload_trace_state_variables (struct target_ops
*self
,
13944 struct uploaded_tsv
**utsvp
)
13946 struct remote_state
*rs
= get_remote_state ();
13949 /* Ask for a first packet of variable definition. */
13951 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13953 while (*p
&& *p
!= 'l')
13955 parse_tsv_definition (p
, utsvp
);
13956 /* Ask for another packet of variable definition. */
13958 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13964 /* The "set/show range-stepping" show hook. */
13967 show_range_stepping (struct ui_file
*file
, int from_tty
,
13968 struct cmd_list_element
*c
,
13971 fprintf_filtered (file
,
13972 _("Debugger's willingness to use range stepping "
13973 "is %s.\n"), value
);
13976 /* The "set/show range-stepping" set hook. */
13979 set_range_stepping (const char *ignore_args
, int from_tty
,
13980 struct cmd_list_element
*c
)
13982 struct remote_state
*rs
= get_remote_state ();
13984 /* Whene enabling, check whether range stepping is actually
13985 supported by the target, and warn if not. */
13986 if (use_range_stepping
)
13988 if (rs
->remote_desc
!= NULL
)
13990 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13991 remote_vcont_probe (rs
);
13993 if (packet_support (PACKET_vCont
) == PACKET_ENABLE
13994 && rs
->supports_vCont
.r
)
13998 warning (_("Range stepping is not supported by the current target"));
14003 _initialize_remote (void)
14005 struct cmd_list_element
*cmd
;
14006 const char *cmd_name
;
14008 /* architecture specific data */
14009 remote_gdbarch_data_handle
=
14010 gdbarch_data_register_post_init (init_remote_state
);
14011 remote_g_packet_data_handle
=
14012 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14015 = register_program_space_data_with_cleanup (NULL
,
14016 remote_pspace_data_cleanup
);
14018 /* Initialize the per-target state. At the moment there is only one
14019 of these, not one per target. Only one target is active at a
14021 remote_state
= new_remote_state ();
14023 init_remote_ops ();
14024 add_target (&remote_ops
);
14026 init_extended_remote_ops ();
14027 add_target (&extended_remote_ops
);
14029 /* Hook into new objfile notification. */
14030 observer_attach_new_objfile (remote_new_objfile
);
14031 /* We're no longer interested in notification events of an inferior
14033 observer_attach_inferior_exit (discard_pending_stop_replies
);
14036 init_remote_threadtests ();
14039 stop_reply_queue
= QUEUE_alloc (stop_reply_p
, stop_reply_xfree
);
14040 /* set/show remote ... */
14042 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
14043 Remote protocol specific variables\n\
14044 Configure various remote-protocol specific variables such as\n\
14045 the packets being used"),
14046 &remote_set_cmdlist
, "set remote ",
14047 0 /* allow-unknown */, &setlist
);
14048 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14049 Remote protocol specific variables\n\
14050 Configure various remote-protocol specific variables such as\n\
14051 the packets being used"),
14052 &remote_show_cmdlist
, "show remote ",
14053 0 /* allow-unknown */, &showlist
);
14055 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14056 Compare section data on target to the exec file.\n\
14057 Argument is a single section name (default: all loaded sections).\n\
14058 To compare only read-only loaded sections, specify the -r option."),
14061 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14062 Send an arbitrary packet to a remote target.\n\
14063 maintenance packet TEXT\n\
14064 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14065 this command sends the string TEXT to the inferior, and displays the\n\
14066 response packet. GDB supplies the initial `$' character, and the\n\
14067 terminating `#' character and checksum."),
14070 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14071 Set whether to send break if interrupted."), _("\
14072 Show whether to send break if interrupted."), _("\
14073 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14074 set_remotebreak
, show_remotebreak
,
14075 &setlist
, &showlist
);
14076 cmd_name
= "remotebreak";
14077 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
14078 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14079 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14080 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
14081 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14083 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14084 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14086 Set interrupt sequence to remote target."), _("\
14087 Show interrupt sequence to remote target."), _("\
14088 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14089 NULL
, show_interrupt_sequence
,
14090 &remote_set_cmdlist
,
14091 &remote_show_cmdlist
);
14093 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14094 &interrupt_on_connect
, _("\
14095 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14096 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14097 If set, interrupt sequence is sent to remote target."),
14099 &remote_set_cmdlist
, &remote_show_cmdlist
);
14101 /* Install commands for configuring memory read/write packets. */
14103 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14104 Set the maximum number of bytes per memory write packet (deprecated)."),
14106 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14107 Show the maximum number of bytes per memory write packet (deprecated)."),
14109 add_cmd ("memory-write-packet-size", no_class
,
14110 set_memory_write_packet_size
, _("\
14111 Set the maximum number of bytes per memory-write packet.\n\
14112 Specify the number of bytes in a packet or 0 (zero) for the\n\
14113 default packet size. The actual limit is further reduced\n\
14114 dependent on the target. Specify ``fixed'' to disable the\n\
14115 further restriction and ``limit'' to enable that restriction."),
14116 &remote_set_cmdlist
);
14117 add_cmd ("memory-read-packet-size", no_class
,
14118 set_memory_read_packet_size
, _("\
14119 Set the maximum number of bytes per memory-read packet.\n\
14120 Specify the number of bytes in a packet or 0 (zero) for the\n\
14121 default packet size. The actual limit is further reduced\n\
14122 dependent on the target. Specify ``fixed'' to disable the\n\
14123 further restriction and ``limit'' to enable that restriction."),
14124 &remote_set_cmdlist
);
14125 add_cmd ("memory-write-packet-size", no_class
,
14126 show_memory_write_packet_size
,
14127 _("Show the maximum number of bytes per memory-write packet."),
14128 &remote_show_cmdlist
);
14129 add_cmd ("memory-read-packet-size", no_class
,
14130 show_memory_read_packet_size
,
14131 _("Show the maximum number of bytes per memory-read packet."),
14132 &remote_show_cmdlist
);
14134 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
14135 &remote_hw_watchpoint_limit
, _("\
14136 Set the maximum number of target hardware watchpoints."), _("\
14137 Show the maximum number of target hardware watchpoints."), _("\
14138 Specify a negative limit for unlimited."),
14139 NULL
, NULL
, /* FIXME: i18n: The maximum
14140 number of target hardware
14141 watchpoints is %s. */
14142 &remote_set_cmdlist
, &remote_show_cmdlist
);
14143 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class
,
14144 &remote_hw_watchpoint_length_limit
, _("\
14145 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14146 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14147 Specify a negative limit for unlimited."),
14148 NULL
, NULL
, /* FIXME: i18n: The maximum
14149 length (in bytes) of a target
14150 hardware watchpoint is %s. */
14151 &remote_set_cmdlist
, &remote_show_cmdlist
);
14152 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
14153 &remote_hw_breakpoint_limit
, _("\
14154 Set the maximum number of target hardware breakpoints."), _("\
14155 Show the maximum number of target hardware breakpoints."), _("\
14156 Specify a negative limit for unlimited."),
14157 NULL
, NULL
, /* FIXME: i18n: The maximum
14158 number of target hardware
14159 breakpoints is %s. */
14160 &remote_set_cmdlist
, &remote_show_cmdlist
);
14162 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14163 &remote_address_size
, _("\
14164 Set the maximum size of the address (in bits) in a memory packet."), _("\
14165 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14167 NULL
, /* FIXME: i18n: */
14168 &setlist
, &showlist
);
14170 init_all_packet_configs ();
14172 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14173 "X", "binary-download", 1);
14175 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14176 "vCont", "verbose-resume", 0);
14178 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14179 "QPassSignals", "pass-signals", 0);
14181 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14182 "QCatchSyscalls", "catch-syscalls", 0);
14184 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14185 "QProgramSignals", "program-signals", 0);
14187 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14188 "QSetWorkingDir", "set-working-dir", 0);
14190 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14191 "QStartupWithShell", "startup-with-shell", 0);
14193 add_packet_config_cmd (&remote_protocol_packets
14194 [PACKET_QEnvironmentHexEncoded
],
14195 "QEnvironmentHexEncoded", "environment-hex-encoded",
14198 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14199 "QEnvironmentReset", "environment-reset",
14202 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14203 "QEnvironmentUnset", "environment-unset",
14206 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14207 "qSymbol", "symbol-lookup", 0);
14209 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14210 "P", "set-register", 1);
14212 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14213 "p", "fetch-register", 1);
14215 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14216 "Z0", "software-breakpoint", 0);
14218 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14219 "Z1", "hardware-breakpoint", 0);
14221 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14222 "Z2", "write-watchpoint", 0);
14224 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14225 "Z3", "read-watchpoint", 0);
14227 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14228 "Z4", "access-watchpoint", 0);
14230 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14231 "qXfer:auxv:read", "read-aux-vector", 0);
14233 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14234 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14236 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14237 "qXfer:features:read", "target-features", 0);
14239 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14240 "qXfer:libraries:read", "library-info", 0);
14242 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14243 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14245 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14246 "qXfer:memory-map:read", "memory-map", 0);
14248 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
14249 "qXfer:spu:read", "read-spu-object", 0);
14251 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
14252 "qXfer:spu:write", "write-spu-object", 0);
14254 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14255 "qXfer:osdata:read", "osdata", 0);
14257 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14258 "qXfer:threads:read", "threads", 0);
14260 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14261 "qXfer:siginfo:read", "read-siginfo-object", 0);
14263 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14264 "qXfer:siginfo:write", "write-siginfo-object", 0);
14266 add_packet_config_cmd
14267 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14268 "qXfer:traceframe-info:read", "traceframe-info", 0);
14270 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14271 "qXfer:uib:read", "unwind-info-block", 0);
14273 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14274 "qGetTLSAddr", "get-thread-local-storage-address",
14277 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14278 "qGetTIBAddr", "get-thread-information-block-address",
14281 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14282 "bc", "reverse-continue", 0);
14284 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14285 "bs", "reverse-step", 0);
14287 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14288 "qSupported", "supported-packets", 0);
14290 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14291 "qSearch:memory", "search-memory", 0);
14293 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14294 "qTStatus", "trace-status", 0);
14296 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14297 "vFile:setfs", "hostio-setfs", 0);
14299 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14300 "vFile:open", "hostio-open", 0);
14302 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14303 "vFile:pread", "hostio-pread", 0);
14305 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14306 "vFile:pwrite", "hostio-pwrite", 0);
14308 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14309 "vFile:close", "hostio-close", 0);
14311 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14312 "vFile:unlink", "hostio-unlink", 0);
14314 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14315 "vFile:readlink", "hostio-readlink", 0);
14317 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14318 "vFile:fstat", "hostio-fstat", 0);
14320 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14321 "vAttach", "attach", 0);
14323 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14326 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14327 "QStartNoAckMode", "noack", 0);
14329 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14330 "vKill", "kill", 0);
14332 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14333 "qAttached", "query-attached", 0);
14335 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14336 "ConditionalTracepoints",
14337 "conditional-tracepoints", 0);
14339 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14340 "ConditionalBreakpoints",
14341 "conditional-breakpoints", 0);
14343 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14344 "BreakpointCommands",
14345 "breakpoint-commands", 0);
14347 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14348 "FastTracepoints", "fast-tracepoints", 0);
14350 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14351 "TracepointSource", "TracepointSource", 0);
14353 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14354 "QAllow", "allow", 0);
14356 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14357 "StaticTracepoints", "static-tracepoints", 0);
14359 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14360 "InstallInTrace", "install-in-trace", 0);
14362 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14363 "qXfer:statictrace:read", "read-sdata-object", 0);
14365 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14366 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14368 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14369 "QDisableRandomization", "disable-randomization", 0);
14371 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14372 "QAgent", "agent", 0);
14374 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14375 "QTBuffer:size", "trace-buffer-size", 0);
14377 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14378 "Qbtrace:off", "disable-btrace", 0);
14380 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14381 "Qbtrace:bts", "enable-btrace-bts", 0);
14383 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14384 "Qbtrace:pt", "enable-btrace-pt", 0);
14386 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14387 "qXfer:btrace", "read-btrace", 0);
14389 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14390 "qXfer:btrace-conf", "read-btrace-conf", 0);
14392 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14393 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14395 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14396 "multiprocess-feature", "multiprocess-feature", 0);
14398 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14399 "swbreak-feature", "swbreak-feature", 0);
14401 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14402 "hwbreak-feature", "hwbreak-feature", 0);
14404 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14405 "fork-event-feature", "fork-event-feature", 0);
14407 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14408 "vfork-event-feature", "vfork-event-feature", 0);
14410 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14411 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14413 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14414 "vContSupported", "verbose-resume-supported", 0);
14416 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14417 "exec-event-feature", "exec-event-feature", 0);
14419 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14420 "vCtrlC", "ctrl-c", 0);
14422 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14423 "QThreadEvents", "thread-events", 0);
14425 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14426 "N stop reply", "no-resumed-stop-reply", 0);
14428 /* Assert that we've registered "set remote foo-packet" commands
14429 for all packet configs. */
14433 for (i
= 0; i
< PACKET_MAX
; i
++)
14435 /* Ideally all configs would have a command associated. Some
14436 still don't though. */
14441 case PACKET_QNonStop
:
14442 case PACKET_EnableDisableTracepoints_feature
:
14443 case PACKET_tracenz_feature
:
14444 case PACKET_DisconnectedTracing_feature
:
14445 case PACKET_augmented_libraries_svr4_read_feature
:
14447 /* Additions to this list need to be well justified:
14448 pre-existing packets are OK; new packets are not. */
14456 /* This catches both forgetting to add a config command, and
14457 forgetting to remove a packet from the exception list. */
14458 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14462 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14463 Z sub-packet has its own set and show commands, but users may
14464 have sets to this variable in their .gdbinit files (or in their
14466 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14467 &remote_Z_packet_detect
, _("\
14468 Set use of remote protocol `Z' packets"), _("\
14469 Show use of remote protocol `Z' packets "), _("\
14470 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14472 set_remote_protocol_Z_packet_cmd
,
14473 show_remote_protocol_Z_packet_cmd
,
14474 /* FIXME: i18n: Use of remote protocol
14475 `Z' packets is %s. */
14476 &remote_set_cmdlist
, &remote_show_cmdlist
);
14478 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
14479 Manipulate files on the remote system\n\
14480 Transfer files to and from the remote target system."),
14481 &remote_cmdlist
, "remote ",
14482 0 /* allow-unknown */, &cmdlist
);
14484 add_cmd ("put", class_files
, remote_put_command
,
14485 _("Copy a local file to the remote system."),
14488 add_cmd ("get", class_files
, remote_get_command
,
14489 _("Copy a remote file to the local system."),
14492 add_cmd ("delete", class_files
, remote_delete_command
,
14493 _("Delete a remote file."),
14496 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14497 &remote_exec_file_var
, _("\
14498 Set the remote pathname for \"run\""), _("\
14499 Show the remote pathname for \"run\""), NULL
,
14500 set_remote_exec_file
,
14501 show_remote_exec_file
,
14502 &remote_set_cmdlist
,
14503 &remote_show_cmdlist
);
14505 add_setshow_boolean_cmd ("range-stepping", class_run
,
14506 &use_range_stepping
, _("\
14507 Enable or disable range stepping."), _("\
14508 Show whether target-assisted range stepping is enabled."), _("\
14509 If on, and the target supports it, when stepping a source line, GDB\n\
14510 tells the target to step the corresponding range of addresses itself instead\n\
14511 of issuing multiple single-steps. This speeds up source level\n\
14512 stepping. If off, GDB always issues single-steps, even if range\n\
14513 stepping is supported by the target. The default is on."),
14514 set_range_stepping
,
14515 show_range_stepping
,
14519 /* Eventually initialize fileio. See fileio.c */
14520 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
14522 /* Take advantage of the fact that the TID field is not used, to tag
14523 special ptids with it set to != 0. */
14524 magic_null_ptid
= ptid_build (42000, -1, 1);
14525 not_sent_ptid
= ptid_build (42000, -2, 1);
14526 any_thread_ptid
= ptid_build (42000, 0, 1);