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. */
2977 explicit thread_item (ptid_t ptid_
)
2981 thread_item (thread_item
&&other
) = default;
2982 thread_item
&operator= (thread_item
&&other
) = default;
2984 DISABLE_COPY_AND_ASSIGN (thread_item
);
2986 /* The thread's PTID. */
2989 /* The thread's extra info. */
2992 /* The thread's name. */
2995 /* The core the thread was running on. -1 if not known. */
2998 /* The thread handle associated with the thread. */
2999 gdb::byte_vector thread_handle
;
3003 /* Context passed around to the various methods listing remote
3004 threads. As new threads are found, they're added to the ITEMS
3007 struct threads_listing_context
3009 /* Return true if this object contains an entry for a thread with ptid
3012 bool contains_thread (ptid_t ptid
) const
3014 auto match_ptid
= [&] (const thread_item
&item
)
3016 return item
.ptid
== ptid
;
3019 auto it
= std::find_if (this->items
.begin (),
3023 return it
!= this->items
.end ();
3026 /* Remove the thread with ptid PTID. */
3028 void remove_thread (ptid_t ptid
)
3030 auto match_ptid
= [&] (const thread_item
&item
)
3032 return item
.ptid
== ptid
;
3035 auto it
= std::remove_if (this->items
.begin (),
3039 if (it
!= this->items
.end ())
3040 this->items
.erase (it
);
3043 /* The threads found on the remote target. */
3044 std::vector
<thread_item
> items
;
3048 remote_newthread_step (threadref
*ref
, void *data
)
3050 struct threads_listing_context
*context
3051 = (struct threads_listing_context
*) data
;
3052 int pid
= inferior_ptid
.pid ();
3053 int lwp
= threadref_to_int (ref
);
3054 ptid_t
ptid (pid
, lwp
);
3056 context
->items
.emplace_back (ptid
);
3058 return 1; /* continue iterator */
3061 #define CRAZY_MAX_THREADS 1000
3064 remote_current_thread (ptid_t oldpid
)
3066 struct remote_state
*rs
= get_remote_state ();
3069 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3070 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3075 result
= read_ptid (&rs
->buf
[2], &obuf
);
3076 if (*obuf
!= '\0' && remote_debug
)
3077 fprintf_unfiltered (gdb_stdlog
,
3078 "warning: garbage in qC reply\n");
3086 /* List remote threads using the deprecated qL packet. */
3089 remote_get_threads_with_ql (struct target_ops
*ops
,
3090 struct threads_listing_context
*context
)
3092 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3093 CRAZY_MAX_THREADS
) >= 0)
3099 #if defined(HAVE_LIBEXPAT)
3102 start_thread (struct gdb_xml_parser
*parser
,
3103 const struct gdb_xml_element
*element
,
3104 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
3106 struct threads_listing_context
*data
3107 = (struct threads_listing_context
*) user_data
;
3108 struct gdb_xml_value
*attr
;
3110 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
;
3111 ptid_t ptid
= read_ptid (id
, NULL
);
3113 data
->items
.emplace_back (ptid
);
3114 thread_item
&item
= data
->items
.back ();
3116 attr
= xml_find_attribute (attributes
, "core");
3118 item
.core
= *(ULONGEST
*) attr
->value
;
3120 attr
= xml_find_attribute (attributes
, "name");
3122 item
.name
= (const char *) attr
->value
;
3124 attr
= xml_find_attribute (attributes
, "handle");
3126 item
.thread_handle
= hex2bin ((const char *) attr
->value
);
3130 end_thread (struct gdb_xml_parser
*parser
,
3131 const struct gdb_xml_element
*element
,
3132 void *user_data
, const char *body_text
)
3134 struct threads_listing_context
*data
3135 = (struct threads_listing_context
*) user_data
;
3137 if (body_text
!= NULL
&& *body_text
!= '\0')
3138 data
->items
.back ().extra
= body_text
;
3141 const struct gdb_xml_attribute thread_attributes
[] = {
3142 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3143 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3144 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3145 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3146 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3149 const struct gdb_xml_element thread_children
[] = {
3150 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3153 const struct gdb_xml_element threads_children
[] = {
3154 { "thread", thread_attributes
, thread_children
,
3155 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3156 start_thread
, end_thread
},
3157 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3160 const struct gdb_xml_element threads_elements
[] = {
3161 { "threads", NULL
, threads_children
,
3162 GDB_XML_EF_NONE
, NULL
, NULL
},
3163 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3168 /* List remote threads using qXfer:threads:read. */
3171 remote_get_threads_with_qxfer (struct target_ops
*ops
,
3172 struct threads_listing_context
*context
)
3174 #if defined(HAVE_LIBEXPAT)
3175 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3177 gdb::unique_xmalloc_ptr
<char> xml
3178 = target_read_stralloc (ops
, TARGET_OBJECT_THREADS
, NULL
);
3180 if (xml
!= NULL
&& *xml
!= '\0')
3182 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3183 threads_elements
, xml
.get (), context
);
3193 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3196 remote_get_threads_with_qthreadinfo (struct target_ops
*ops
,
3197 struct threads_listing_context
*context
)
3199 struct remote_state
*rs
= get_remote_state ();
3201 if (rs
->use_threadinfo_query
)
3205 putpkt ("qfThreadInfo");
3206 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3208 if (bufp
[0] != '\0') /* q packet recognized */
3210 while (*bufp
++ == 'm') /* reply contains one or more TID */
3214 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3215 context
->items
.emplace_back (ptid
);
3217 while (*bufp
++ == ','); /* comma-separated list */
3218 putpkt ("qsThreadInfo");
3219 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3226 /* Packet not recognized. */
3227 rs
->use_threadinfo_query
= 0;
3234 /* Implement the to_update_thread_list function for the remote
3238 remote_update_thread_list (struct target_ops
*ops
)
3240 struct threads_listing_context context
;
3243 /* We have a few different mechanisms to fetch the thread list. Try
3244 them all, starting with the most preferred one first, falling
3245 back to older methods. */
3246 if (remote_get_threads_with_qxfer (ops
, &context
)
3247 || remote_get_threads_with_qthreadinfo (ops
, &context
)
3248 || remote_get_threads_with_ql (ops
, &context
))
3251 struct thread_info
*tp
, *tmp
;
3255 if (context
.items
.empty ()
3256 && remote_thread_always_alive (ops
, inferior_ptid
))
3258 /* Some targets don't really support threads, but still
3259 reply an (empty) thread list in response to the thread
3260 listing packets, instead of replying "packet not
3261 supported". Exit early so we don't delete the main
3266 /* CONTEXT now holds the current thread list on the remote
3267 target end. Delete GDB-side threads no longer found on the
3269 ALL_THREADS_SAFE (tp
, tmp
)
3271 if (!context
.contains_thread (tp
->ptid
))
3274 delete_thread (tp
->ptid
);
3278 /* Remove any unreported fork child threads from CONTEXT so
3279 that we don't interfere with follow fork, which is where
3280 creation of such threads is handled. */
3281 remove_new_fork_children (&context
);
3283 /* And now add threads we don't know about yet to our list. */
3284 for (thread_item
&item
: context
.items
)
3286 if (item
.ptid
!= null_ptid
)
3288 struct private_thread_info
*info
;
3289 /* In non-stop mode, we assume new found threads are
3290 executing until proven otherwise with a stop reply.
3291 In all-stop, we can only get here if all threads are
3293 int executing
= target_is_non_stop_p () ? 1 : 0;
3295 remote_notice_new_inferior (item
.ptid
, executing
);
3297 info
= get_private_info_ptid (item
.ptid
);
3298 info
->core
= item
.core
;
3299 info
->extra
= xstrdup (item
.extra
.c_str ());
3300 info
->name
= xstrdup (item
.name
.c_str ());
3302 = new gdb::byte_vector (std::move (item
.thread_handle
));
3309 /* If no thread listing method is supported, then query whether
3310 each known thread is alive, one by one, with the T packet.
3311 If the target doesn't support threads at all, then this is a
3312 no-op. See remote_thread_alive. */
3318 * Collect a descriptive string about the given thread.
3319 * The target may say anything it wants to about the thread
3320 * (typically info about its blocked / runnable state, name, etc.).
3321 * This string will appear in the info threads display.
3323 * Optional: targets are not required to implement this function.
3327 remote_threads_extra_info (struct target_ops
*self
, struct thread_info
*tp
)
3329 struct remote_state
*rs
= get_remote_state ();
3333 struct gdb_ext_thread_info threadinfo
;
3334 static char display_buf
[100]; /* arbitrary... */
3335 int n
= 0; /* position in display_buf */
3337 if (rs
->remote_desc
== 0) /* paranoia */
3338 internal_error (__FILE__
, __LINE__
,
3339 _("remote_threads_extra_info"));
3341 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
3342 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_lwp (tp
->ptid
) == 0))
3343 /* This is the main thread which was added by GDB. The remote
3344 server doesn't know about it. */
3347 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3349 struct thread_info
*info
= find_thread_ptid (tp
->ptid
);
3351 if (info
&& info
->priv
)
3352 return info
->priv
->extra
;
3357 if (rs
->use_threadextra_query
)
3360 char *endb
= rs
->buf
+ get_remote_packet_size ();
3362 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3364 write_ptid (b
, endb
, tp
->ptid
);
3367 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3368 if (rs
->buf
[0] != 0)
3370 n
= std::min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
3371 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
3372 display_buf
[result
] = '\0';
3377 /* If the above query fails, fall back to the old method. */
3378 rs
->use_threadextra_query
= 0;
3379 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3380 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3381 int_to_threadref (&id
, ptid_get_lwp (tp
->ptid
));
3382 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3383 if (threadinfo
.active
)
3385 if (*threadinfo
.shortname
)
3386 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
3387 " Name: %s,", threadinfo
.shortname
);
3388 if (*threadinfo
.display
)
3389 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3390 " State: %s,", threadinfo
.display
);
3391 if (*threadinfo
.more_display
)
3392 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3393 " Priority: %s", threadinfo
.more_display
);
3397 /* For purely cosmetic reasons, clear up trailing commas. */
3398 if (',' == display_buf
[n
-1])
3399 display_buf
[n
-1] = ' ';
3408 remote_static_tracepoint_marker_at (struct target_ops
*self
, CORE_ADDR addr
,
3409 struct static_tracepoint_marker
*marker
)
3411 struct remote_state
*rs
= get_remote_state ();
3414 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3416 p
+= hexnumstr (p
, addr
);
3418 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3422 error (_("Remote failure reply: %s"), p
);
3426 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
3433 static VEC(static_tracepoint_marker_p
) *
3434 remote_static_tracepoint_markers_by_strid (struct target_ops
*self
,
3437 struct remote_state
*rs
= get_remote_state ();
3438 VEC(static_tracepoint_marker_p
) *markers
= NULL
;
3439 struct static_tracepoint_marker
*marker
= NULL
;
3440 struct cleanup
*old_chain
;
3443 /* Ask for a first packet of static tracepoint marker
3446 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3449 error (_("Remote failure reply: %s"), p
);
3451 old_chain
= make_cleanup (free_current_marker
, &marker
);
3456 marker
= XCNEW (struct static_tracepoint_marker
);
3460 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
3462 if (strid
== NULL
|| strcmp (strid
, marker
->str_id
) == 0)
3464 VEC_safe_push (static_tracepoint_marker_p
,
3470 release_static_tracepoint_marker (marker
);
3471 memset (marker
, 0, sizeof (*marker
));
3474 while (*p
++ == ','); /* comma-separated list */
3475 /* Ask for another packet of static tracepoint definition. */
3477 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3481 do_cleanups (old_chain
);
3486 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3489 remote_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long thread
)
3491 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, 0);
3495 /* Restart the remote side; this is an extended protocol operation. */
3498 extended_remote_restart (void)
3500 struct remote_state
*rs
= get_remote_state ();
3502 /* Send the restart command; for reasons I don't understand the
3503 remote side really expects a number after the "R". */
3504 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
3507 remote_fileio_reset ();
3510 /* Clean up connection to a remote debugger. */
3513 remote_close (struct target_ops
*self
)
3515 struct remote_state
*rs
= get_remote_state ();
3517 if (rs
->remote_desc
== NULL
)
3518 return; /* already closed */
3520 /* Make sure we leave stdin registered in the event loop. */
3521 remote_terminal_ours (self
);
3523 serial_close (rs
->remote_desc
);
3524 rs
->remote_desc
= NULL
;
3526 /* We don't have a connection to the remote stub anymore. Get rid
3527 of all the inferiors and their threads we were controlling.
3528 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3529 will be unable to find the thread corresponding to (pid, 0, 0). */
3530 inferior_ptid
= null_ptid
;
3531 discard_all_inferiors ();
3533 /* We are closing the remote target, so we should discard
3534 everything of this target. */
3535 discard_pending_stop_replies_in_queue (rs
);
3537 if (remote_async_inferior_event_token
)
3538 delete_async_event_handler (&remote_async_inferior_event_token
);
3540 remote_notif_state_xfree (rs
->notif_state
);
3542 trace_reset_local_state ();
3545 /* Query the remote side for the text, data and bss offsets. */
3550 struct remote_state
*rs
= get_remote_state ();
3553 int lose
, num_segments
= 0, do_sections
, do_segments
;
3554 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
3555 struct section_offsets
*offs
;
3556 struct symfile_segment_data
*data
;
3558 if (symfile_objfile
== NULL
)
3561 putpkt ("qOffsets");
3562 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3565 if (buf
[0] == '\000')
3566 return; /* Return silently. Stub doesn't support
3570 warning (_("Remote failure reply: %s"), buf
);
3574 /* Pick up each field in turn. This used to be done with scanf, but
3575 scanf will make trouble if CORE_ADDR size doesn't match
3576 conversion directives correctly. The following code will work
3577 with any size of CORE_ADDR. */
3578 text_addr
= data_addr
= bss_addr
= 0;
3582 if (startswith (ptr
, "Text="))
3585 /* Don't use strtol, could lose on big values. */
3586 while (*ptr
&& *ptr
!= ';')
3587 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3589 if (startswith (ptr
, ";Data="))
3592 while (*ptr
&& *ptr
!= ';')
3593 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3598 if (!lose
&& startswith (ptr
, ";Bss="))
3601 while (*ptr
&& *ptr
!= ';')
3602 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
3604 if (bss_addr
!= data_addr
)
3605 warning (_("Target reported unsupported offsets: %s"), buf
);
3610 else if (startswith (ptr
, "TextSeg="))
3613 /* Don't use strtol, could lose on big values. */
3614 while (*ptr
&& *ptr
!= ';')
3615 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3618 if (startswith (ptr
, ";DataSeg="))
3621 while (*ptr
&& *ptr
!= ';')
3622 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3630 error (_("Malformed response to offset query, %s"), buf
);
3631 else if (*ptr
!= '\0')
3632 warning (_("Target reported unsupported offsets: %s"), buf
);
3634 offs
= ((struct section_offsets
*)
3635 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
3636 memcpy (offs
, symfile_objfile
->section_offsets
,
3637 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
3639 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
3640 do_segments
= (data
!= NULL
);
3641 do_sections
= num_segments
== 0;
3643 if (num_segments
> 0)
3645 segments
[0] = text_addr
;
3646 segments
[1] = data_addr
;
3648 /* If we have two segments, we can still try to relocate everything
3649 by assuming that the .text and .data offsets apply to the whole
3650 text and data segments. Convert the offsets given in the packet
3651 to base addresses for symfile_map_offsets_to_segments. */
3652 else if (data
&& data
->num_segments
== 2)
3654 segments
[0] = data
->segment_bases
[0] + text_addr
;
3655 segments
[1] = data
->segment_bases
[1] + data_addr
;
3658 /* If the object file has only one segment, assume that it is text
3659 rather than data; main programs with no writable data are rare,
3660 but programs with no code are useless. Of course the code might
3661 have ended up in the data segment... to detect that we would need
3662 the permissions here. */
3663 else if (data
&& data
->num_segments
== 1)
3665 segments
[0] = data
->segment_bases
[0] + text_addr
;
3668 /* There's no way to relocate by segment. */
3674 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
3675 offs
, num_segments
, segments
);
3677 if (ret
== 0 && !do_sections
)
3678 error (_("Can not handle qOffsets TextSeg "
3679 "response with this symbol file"));
3686 free_symfile_segment_data (data
);
3690 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
3692 /* This is a temporary kludge to force data and bss to use the
3693 same offsets because that's what nlmconv does now. The real
3694 solution requires changes to the stub and remote.c that I
3695 don't have time to do right now. */
3697 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
3698 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
3701 objfile_relocate (symfile_objfile
, offs
);
3704 /* Send interrupt_sequence to remote target. */
3706 send_interrupt_sequence (void)
3708 struct remote_state
*rs
= get_remote_state ();
3710 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3711 remote_serial_write ("\x03", 1);
3712 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3713 serial_send_break (rs
->remote_desc
);
3714 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3716 serial_send_break (rs
->remote_desc
);
3717 remote_serial_write ("g", 1);
3720 internal_error (__FILE__
, __LINE__
,
3721 _("Invalid value for interrupt_sequence_mode: %s."),
3722 interrupt_sequence_mode
);
3726 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3727 and extract the PTID. Returns NULL_PTID if not found. */
3730 stop_reply_extract_thread (char *stop_reply
)
3732 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
3736 /* Txx r:val ; r:val (...) */
3739 /* Look for "register" named "thread". */
3744 p1
= strchr (p
, ':');
3748 if (strncmp (p
, "thread", p1
- p
) == 0)
3749 return read_ptid (++p1
, &p
);
3751 p1
= strchr (p
, ';');
3763 /* Determine the remote side's current thread. If we have a stop
3764 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3765 "thread" register we can extract the current thread from. If not,
3766 ask the remote which is the current thread with qC. The former
3767 method avoids a roundtrip. */
3770 get_current_thread (char *wait_status
)
3772 ptid_t ptid
= null_ptid
;
3774 /* Note we don't use remote_parse_stop_reply as that makes use of
3775 the target architecture, which we haven't yet fully determined at
3777 if (wait_status
!= NULL
)
3778 ptid
= stop_reply_extract_thread (wait_status
);
3779 if (ptid_equal (ptid
, null_ptid
))
3780 ptid
= remote_current_thread (inferior_ptid
);
3785 /* Query the remote target for which is the current thread/process,
3786 add it to our tables, and update INFERIOR_PTID. The caller is
3787 responsible for setting the state such that the remote end is ready
3788 to return the current thread.
3790 This function is called after handling the '?' or 'vRun' packets,
3791 whose response is a stop reply from which we can also try
3792 extracting the thread. If the target doesn't support the explicit
3793 qC query, we infer the current thread from that stop reply, passed
3794 in in WAIT_STATUS, which may be NULL. */
3797 add_current_inferior_and_thread (char *wait_status
)
3799 struct remote_state
*rs
= get_remote_state ();
3802 inferior_ptid
= null_ptid
;
3804 /* Now, if we have thread information, update inferior_ptid. */
3805 ptid_t curr_ptid
= get_current_thread (wait_status
);
3807 if (curr_ptid
!= null_ptid
)
3809 if (!remote_multi_process_p (rs
))
3814 /* Without this, some commands which require an active target
3815 (such as kill) won't work. This variable serves (at least)
3816 double duty as both the pid of the target process (if it has
3817 such), and as a flag indicating that a target is active. */
3818 curr_ptid
= magic_null_ptid
;
3822 remote_add_inferior (fake_pid_p
, ptid_get_pid (curr_ptid
), -1, 1);
3824 /* Add the main thread and switch to it. Don't try reading
3825 registers yet, since we haven't fetched the target description
3827 thread_info
*tp
= add_thread_silent (curr_ptid
);
3828 switch_to_thread_no_regs (tp
);
3831 /* Print info about a thread that was found already stopped on
3835 print_one_stopped_thread (struct thread_info
*thread
)
3837 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
3839 switch_to_thread (thread
->ptid
);
3840 stop_pc
= get_frame_pc (get_current_frame ());
3841 set_current_sal_from_frame (get_current_frame ());
3843 thread
->suspend
.waitstatus_pending_p
= 0;
3845 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
3847 enum gdb_signal sig
= ws
->value
.sig
;
3849 if (signal_print_state (sig
))
3850 observer_notify_signal_received (sig
);
3852 observer_notify_normal_stop (NULL
, 1);
3855 /* Process all initial stop replies the remote side sent in response
3856 to the ? packet. These indicate threads that were already stopped
3857 on initial connection. We mark these threads as stopped and print
3858 their current frame before giving the user the prompt. */
3861 process_initial_stop_replies (int from_tty
)
3863 int pending_stop_replies
= stop_reply_queue_length ();
3864 struct inferior
*inf
;
3865 struct thread_info
*thread
;
3866 struct thread_info
*selected
= NULL
;
3867 struct thread_info
*lowest_stopped
= NULL
;
3868 struct thread_info
*first
= NULL
;
3870 /* Consume the initial pending events. */
3871 while (pending_stop_replies
-- > 0)
3873 ptid_t waiton_ptid
= minus_one_ptid
;
3875 struct target_waitstatus ws
;
3876 int ignore_event
= 0;
3877 struct thread_info
*thread
;
3879 memset (&ws
, 0, sizeof (ws
));
3880 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
3882 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
3886 case TARGET_WAITKIND_IGNORE
:
3887 case TARGET_WAITKIND_NO_RESUMED
:
3888 case TARGET_WAITKIND_SIGNALLED
:
3889 case TARGET_WAITKIND_EXITED
:
3890 /* We shouldn't see these, but if we do, just ignore. */
3892 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
3896 case TARGET_WAITKIND_EXECD
:
3897 xfree (ws
.value
.execd_pathname
);
3906 thread
= find_thread_ptid (event_ptid
);
3908 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
3910 enum gdb_signal sig
= ws
.value
.sig
;
3912 /* Stubs traditionally report SIGTRAP as initial signal,
3913 instead of signal 0. Suppress it. */
3914 if (sig
== GDB_SIGNAL_TRAP
)
3916 thread
->suspend
.stop_signal
= sig
;
3920 thread
->suspend
.waitstatus
= ws
;
3922 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
3923 || ws
.value
.sig
!= GDB_SIGNAL_0
)
3924 thread
->suspend
.waitstatus_pending_p
= 1;
3926 set_executing (event_ptid
, 0);
3927 set_running (event_ptid
, 0);
3928 thread
->priv
->vcont_resumed
= 0;
3931 /* "Notice" the new inferiors before anything related to
3932 registers/memory. */
3938 inf
->needs_setup
= 1;
3942 thread
= any_live_thread_of_process (inf
->pid
);
3943 notice_new_inferior (thread
->ptid
,
3944 thread
->state
== THREAD_RUNNING
,
3949 /* If all-stop on top of non-stop, pause all threads. Note this
3950 records the threads' stop pc, so must be done after "noticing"
3954 stop_all_threads ();
3956 /* If all threads of an inferior were already stopped, we
3957 haven't setup the inferior yet. */
3963 if (inf
->needs_setup
)
3965 thread
= any_live_thread_of_process (inf
->pid
);
3966 switch_to_thread_no_regs (thread
);
3972 /* Now go over all threads that are stopped, and print their current
3973 frame. If all-stop, then if there's a signalled thread, pick
3975 ALL_NON_EXITED_THREADS (thread
)
3981 set_running (thread
->ptid
, 0);
3982 else if (thread
->state
!= THREAD_STOPPED
)
3985 if (selected
== NULL
3986 && thread
->suspend
.waitstatus_pending_p
)
3989 if (lowest_stopped
== NULL
3990 || thread
->inf
->num
< lowest_stopped
->inf
->num
3991 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
3992 lowest_stopped
= thread
;
3995 print_one_stopped_thread (thread
);
3998 /* In all-stop, we only print the status of one thread, and leave
3999 others with their status pending. */
4004 thread
= lowest_stopped
;
4008 print_one_stopped_thread (thread
);
4011 /* For "info program". */
4012 thread
= inferior_thread ();
4013 if (thread
->state
== THREAD_STOPPED
)
4014 set_last_target_status (inferior_ptid
, thread
->suspend
.waitstatus
);
4017 /* Start the remote connection and sync state. */
4020 remote_start_remote (int from_tty
, struct target_ops
*target
, int extended_p
)
4022 struct remote_state
*rs
= get_remote_state ();
4023 struct packet_config
*noack_config
;
4024 char *wait_status
= NULL
;
4026 /* Signal other parts that we're going through the initial setup,
4027 and so things may not be stable yet. E.g., we don't try to
4028 install tracepoints until we've relocated symbols. Also, a
4029 Ctrl-C before we're connected and synced up can't interrupt the
4030 target. Instead, it offers to drop the (potentially wedged)
4032 rs
->starting_up
= 1;
4036 if (interrupt_on_connect
)
4037 send_interrupt_sequence ();
4039 /* Ack any packet which the remote side has already sent. */
4040 remote_serial_write ("+", 1);
4042 /* The first packet we send to the target is the optional "supported
4043 packets" request. If the target can answer this, it will tell us
4044 which later probes to skip. */
4045 remote_query_supported ();
4047 /* If the stub wants to get a QAllow, compose one and send it. */
4048 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4049 remote_set_permissions (target
);
4051 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4052 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4053 as a reply to known packet. For packet "vFile:setfs:" it is an
4054 invalid reply and GDB would return error in
4055 remote_hostio_set_filesystem, making remote files access impossible.
4056 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4057 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4059 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4061 putpkt (v_mustreplyempty
);
4062 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4063 if (strcmp (rs
->buf
, "OK") == 0)
4064 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4065 else if (strcmp (rs
->buf
, "") != 0)
4066 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4070 /* Next, we possibly activate noack mode.
4072 If the QStartNoAckMode packet configuration is set to AUTO,
4073 enable noack mode if the stub reported a wish for it with
4076 If set to TRUE, then enable noack mode even if the stub didn't
4077 report it in qSupported. If the stub doesn't reply OK, the
4078 session ends with an error.
4080 If FALSE, then don't activate noack mode, regardless of what the
4081 stub claimed should be the default with qSupported. */
4083 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4084 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4086 putpkt ("QStartNoAckMode");
4087 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4088 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4094 /* Tell the remote that we are using the extended protocol. */
4096 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4099 /* Let the target know which signals it is allowed to pass down to
4101 update_signals_program_target ();
4103 /* Next, if the target can specify a description, read it. We do
4104 this before anything involving memory or registers. */
4105 target_find_description ();
4107 /* Next, now that we know something about the target, update the
4108 address spaces in the program spaces. */
4109 update_address_spaces ();
4111 /* On OSs where the list of libraries is global to all
4112 processes, we fetch them early. */
4113 if (gdbarch_has_global_solist (target_gdbarch ()))
4114 solib_add (NULL
, from_tty
, auto_solib_add
);
4116 if (target_is_non_stop_p ())
4118 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4119 error (_("Non-stop mode requested, but remote "
4120 "does not support non-stop"));
4122 putpkt ("QNonStop:1");
4123 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4125 if (strcmp (rs
->buf
, "OK") != 0)
4126 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
4128 /* Find about threads and processes the stub is already
4129 controlling. We default to adding them in the running state.
4130 The '?' query below will then tell us about which threads are
4132 remote_update_thread_list (target
);
4134 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4136 /* Don't assume that the stub can operate in all-stop mode.
4137 Request it explicitly. */
4138 putpkt ("QNonStop:0");
4139 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4141 if (strcmp (rs
->buf
, "OK") != 0)
4142 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
4145 /* Upload TSVs regardless of whether the target is running or not. The
4146 remote stub, such as GDBserver, may have some predefined or builtin
4147 TSVs, even if the target is not running. */
4148 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4150 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4152 remote_upload_trace_state_variables (target
, &uploaded_tsvs
);
4153 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4156 /* Check whether the target is running now. */
4158 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4160 if (!target_is_non_stop_p ())
4162 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4165 error (_("The target is not running (try extended-remote?)"));
4167 /* We're connected, but not running. Drop out before we
4168 call start_remote. */
4169 rs
->starting_up
= 0;
4174 /* Save the reply for later. */
4175 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
4176 strcpy (wait_status
, rs
->buf
);
4179 /* Fetch thread list. */
4180 target_update_thread_list ();
4182 /* Let the stub know that we want it to return the thread. */
4183 set_continue_thread (minus_one_ptid
);
4185 if (thread_count () == 0)
4187 /* Target has no concept of threads at all. GDB treats
4188 non-threaded target as single-threaded; add a main
4190 add_current_inferior_and_thread (wait_status
);
4194 /* We have thread information; select the thread the target
4195 says should be current. If we're reconnecting to a
4196 multi-threaded program, this will ideally be the thread
4197 that last reported an event before GDB disconnected. */
4198 inferior_ptid
= get_current_thread (wait_status
);
4199 if (ptid_equal (inferior_ptid
, null_ptid
))
4201 /* Odd... The target was able to list threads, but not
4202 tell us which thread was current (no "thread"
4203 register in T stop reply?). Just pick the first
4204 thread in the thread list then. */
4207 fprintf_unfiltered (gdb_stdlog
,
4208 "warning: couldn't determine remote "
4209 "current thread; picking first in list.\n");
4211 inferior_ptid
= thread_list
->ptid
;
4215 /* init_wait_for_inferior should be called before get_offsets in order
4216 to manage `inserted' flag in bp loc in a correct state.
4217 breakpoint_init_inferior, called from init_wait_for_inferior, set
4218 `inserted' flag to 0, while before breakpoint_re_set, called from
4219 start_remote, set `inserted' flag to 1. In the initialization of
4220 inferior, breakpoint_init_inferior should be called first, and then
4221 breakpoint_re_set can be called. If this order is broken, state of
4222 `inserted' flag is wrong, and cause some problems on breakpoint
4224 init_wait_for_inferior ();
4226 get_offsets (); /* Get text, data & bss offsets. */
4228 /* If we could not find a description using qXfer, and we know
4229 how to do it some other way, try again. This is not
4230 supported for non-stop; it could be, but it is tricky if
4231 there are no stopped threads when we connect. */
4232 if (remote_read_description_p (target
)
4233 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4235 target_clear_description ();
4236 target_find_description ();
4239 /* Use the previously fetched status. */
4240 gdb_assert (wait_status
!= NULL
);
4241 strcpy (rs
->buf
, wait_status
);
4242 rs
->cached_wait_status
= 1;
4244 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4248 /* Clear WFI global state. Do this before finding about new
4249 threads and inferiors, and setting the current inferior.
4250 Otherwise we would clear the proceed status of the current
4251 inferior when we want its stop_soon state to be preserved
4252 (see notice_new_inferior). */
4253 init_wait_for_inferior ();
4255 /* In non-stop, we will either get an "OK", meaning that there
4256 are no stopped threads at this time; or, a regular stop
4257 reply. In the latter case, there may be more than one thread
4258 stopped --- we pull them all out using the vStopped
4260 if (strcmp (rs
->buf
, "OK") != 0)
4262 struct notif_client
*notif
= ¬if_client_stop
;
4264 /* remote_notif_get_pending_replies acks this one, and gets
4266 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4267 = remote_notif_parse (notif
, rs
->buf
);
4268 remote_notif_get_pending_events (notif
);
4271 if (thread_count () == 0)
4274 error (_("The target is not running (try extended-remote?)"));
4276 /* We're connected, but not running. Drop out before we
4277 call start_remote. */
4278 rs
->starting_up
= 0;
4282 /* In non-stop mode, any cached wait status will be stored in
4283 the stop reply queue. */
4284 gdb_assert (wait_status
== NULL
);
4286 /* Report all signals during attach/startup. */
4287 remote_pass_signals (target
, 0, NULL
);
4289 /* If there are already stopped threads, mark them stopped and
4290 report their stops before giving the prompt to the user. */
4291 process_initial_stop_replies (from_tty
);
4293 if (target_can_async_p ())
4297 /* If we connected to a live target, do some additional setup. */
4298 if (target_has_execution
)
4300 if (symfile_objfile
) /* No use without a symbol-file. */
4301 remote_check_symbols ();
4304 /* Possibly the target has been engaged in a trace run started
4305 previously; find out where things are at. */
4306 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4308 struct uploaded_tp
*uploaded_tps
= NULL
;
4310 if (current_trace_status ()->running
)
4311 printf_filtered (_("Trace is already running on the target.\n"));
4313 remote_upload_tracepoints (target
, &uploaded_tps
);
4315 merge_uploaded_tracepoints (&uploaded_tps
);
4318 /* Possibly the target has been engaged in a btrace record started
4319 previously; find out where things are at. */
4320 remote_btrace_maybe_reopen ();
4322 /* The thread and inferior lists are now synchronized with the
4323 target, our symbols have been relocated, and we're merged the
4324 target's tracepoints with ours. We're done with basic start
4326 rs
->starting_up
= 0;
4328 /* Maybe breakpoints are global and need to be inserted now. */
4329 if (breakpoints_should_be_inserted_now ())
4330 insert_breakpoints ();
4333 /* Open a connection to a remote debugger.
4334 NAME is the filename used for communication. */
4337 remote_open (const char *name
, int from_tty
)
4339 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
4342 /* Open a connection to a remote debugger using the extended
4343 remote gdb protocol. NAME is the filename used for communication. */
4346 extended_remote_open (const char *name
, int from_tty
)
4348 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
4351 /* Reset all packets back to "unknown support". Called when opening a
4352 new connection to a remote target. */
4355 reset_all_packet_configs_support (void)
4359 for (i
= 0; i
< PACKET_MAX
; i
++)
4360 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4363 /* Initialize all packet configs. */
4366 init_all_packet_configs (void)
4370 for (i
= 0; i
< PACKET_MAX
; i
++)
4372 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4373 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4377 /* Symbol look-up. */
4380 remote_check_symbols (void)
4382 struct remote_state
*rs
= get_remote_state ();
4383 char *msg
, *reply
, *tmp
;
4386 struct cleanup
*old_chain
;
4388 /* The remote side has no concept of inferiors that aren't running
4389 yet, it only knows about running processes. If we're connected
4390 but our current inferior is not running, we should not invite the
4391 remote target to request symbol lookups related to its
4392 (unrelated) current process. */
4393 if (!target_has_execution
)
4396 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4399 /* Make sure the remote is pointing at the right process. Note
4400 there's no way to select "no process". */
4401 set_general_process ();
4403 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4404 because we need both at the same time. */
4405 msg
= (char *) xmalloc (get_remote_packet_size ());
4406 old_chain
= make_cleanup (xfree
, msg
);
4407 reply
= (char *) xmalloc (get_remote_packet_size ());
4408 make_cleanup (free_current_contents
, &reply
);
4409 reply_size
= get_remote_packet_size ();
4411 /* Invite target to request symbol lookups. */
4413 putpkt ("qSymbol::");
4414 getpkt (&reply
, &reply_size
, 0);
4415 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4417 while (startswith (reply
, "qSymbol:"))
4419 struct bound_minimal_symbol sym
;
4422 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
4424 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
4425 if (sym
.minsym
== NULL
)
4426 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
4429 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4430 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4432 /* If this is a function address, return the start of code
4433 instead of any data function descriptor. */
4434 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4438 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
4439 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4443 getpkt (&reply
, &reply_size
, 0);
4446 do_cleanups (old_chain
);
4449 static struct serial
*
4450 remote_serial_open (const char *name
)
4452 static int udp_warning
= 0;
4454 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4455 of in ser-tcp.c, because it is the remote protocol assuming that the
4456 serial connection is reliable and not the serial connection promising
4458 if (!udp_warning
&& startswith (name
, "udp:"))
4460 warning (_("The remote protocol may be unreliable over UDP.\n"
4461 "Some events may be lost, rendering further debugging "
4466 return serial_open (name
);
4469 /* Inform the target of our permission settings. The permission flags
4470 work without this, but if the target knows the settings, it can do
4471 a couple things. First, it can add its own check, to catch cases
4472 that somehow manage to get by the permissions checks in target
4473 methods. Second, if the target is wired to disallow particular
4474 settings (for instance, a system in the field that is not set up to
4475 be able to stop at a breakpoint), it can object to any unavailable
4479 remote_set_permissions (struct target_ops
*self
)
4481 struct remote_state
*rs
= get_remote_state ();
4483 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAllow:"
4484 "WriteReg:%x;WriteMem:%x;"
4485 "InsertBreak:%x;InsertTrace:%x;"
4486 "InsertFastTrace:%x;Stop:%x",
4487 may_write_registers
, may_write_memory
,
4488 may_insert_breakpoints
, may_insert_tracepoints
,
4489 may_insert_fast_tracepoints
, may_stop
);
4491 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4493 /* If the target didn't like the packet, warn the user. Do not try
4494 to undo the user's settings, that would just be maddening. */
4495 if (strcmp (rs
->buf
, "OK") != 0)
4496 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
4499 /* This type describes each known response to the qSupported
4501 struct protocol_feature
4503 /* The name of this protocol feature. */
4506 /* The default for this protocol feature. */
4507 enum packet_support default_support
;
4509 /* The function to call when this feature is reported, or after
4510 qSupported processing if the feature is not supported.
4511 The first argument points to this structure. The second
4512 argument indicates whether the packet requested support be
4513 enabled, disabled, or probed (or the default, if this function
4514 is being called at the end of processing and this feature was
4515 not reported). The third argument may be NULL; if not NULL, it
4516 is a NUL-terminated string taken from the packet following
4517 this feature's name and an equals sign. */
4518 void (*func
) (const struct protocol_feature
*, enum packet_support
,
4521 /* The corresponding packet for this feature. Only used if
4522 FUNC is remote_supported_packet. */
4527 remote_supported_packet (const struct protocol_feature
*feature
,
4528 enum packet_support support
,
4529 const char *argument
)
4533 warning (_("Remote qSupported response supplied an unexpected value for"
4534 " \"%s\"."), feature
->name
);
4538 remote_protocol_packets
[feature
->packet
].support
= support
;
4542 remote_packet_size (const struct protocol_feature
*feature
,
4543 enum packet_support support
, const char *value
)
4545 struct remote_state
*rs
= get_remote_state ();
4550 if (support
!= PACKET_ENABLE
)
4553 if (value
== NULL
|| *value
== '\0')
4555 warning (_("Remote target reported \"%s\" without a size."),
4561 packet_size
= strtol (value
, &value_end
, 16);
4562 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
4564 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4565 feature
->name
, value
);
4569 /* Record the new maximum packet size. */
4570 rs
->explicit_packet_size
= packet_size
;
4573 static const struct protocol_feature remote_protocol_features
[] = {
4574 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
4575 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
4576 PACKET_qXfer_auxv
},
4577 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
4578 PACKET_qXfer_exec_file
},
4579 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
4580 PACKET_qXfer_features
},
4581 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
4582 PACKET_qXfer_libraries
},
4583 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
4584 PACKET_qXfer_libraries_svr4
},
4585 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
4586 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
4587 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
4588 PACKET_qXfer_memory_map
},
4589 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
4590 PACKET_qXfer_spu_read
},
4591 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
4592 PACKET_qXfer_spu_write
},
4593 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
4594 PACKET_qXfer_osdata
},
4595 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
4596 PACKET_qXfer_threads
},
4597 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
4598 PACKET_qXfer_traceframe_info
},
4599 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
4600 PACKET_QPassSignals
},
4601 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
4602 PACKET_QCatchSyscalls
},
4603 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
4604 PACKET_QProgramSignals
},
4605 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
4606 PACKET_QSetWorkingDir
},
4607 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
4608 PACKET_QStartupWithShell
},
4609 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
4610 PACKET_QEnvironmentHexEncoded
},
4611 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
4612 PACKET_QEnvironmentReset
},
4613 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
4614 PACKET_QEnvironmentUnset
},
4615 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
4616 PACKET_QStartNoAckMode
},
4617 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
4618 PACKET_multiprocess_feature
},
4619 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
4620 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
4621 PACKET_qXfer_siginfo_read
},
4622 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
4623 PACKET_qXfer_siginfo_write
},
4624 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4625 PACKET_ConditionalTracepoints
},
4626 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
4627 PACKET_ConditionalBreakpoints
},
4628 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
4629 PACKET_BreakpointCommands
},
4630 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4631 PACKET_FastTracepoints
},
4632 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4633 PACKET_StaticTracepoints
},
4634 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
4635 PACKET_InstallInTrace
},
4636 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
4637 PACKET_DisconnectedTracing_feature
},
4638 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
4640 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
4642 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
4643 PACKET_TracepointSource
},
4644 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
4646 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4647 PACKET_EnableDisableTracepoints_feature
},
4648 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
4649 PACKET_qXfer_fdpic
},
4650 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
4652 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
4653 PACKET_QDisableRandomization
},
4654 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
4655 { "QTBuffer:size", PACKET_DISABLE
,
4656 remote_supported_packet
, PACKET_QTBuffer_size
},
4657 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
4658 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
4659 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
4660 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
4661 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
4662 PACKET_qXfer_btrace
},
4663 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
4664 PACKET_qXfer_btrace_conf
},
4665 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
4666 PACKET_Qbtrace_conf_bts_size
},
4667 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
4668 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
4669 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
4670 PACKET_fork_event_feature
},
4671 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
4672 PACKET_vfork_event_feature
},
4673 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
4674 PACKET_exec_event_feature
},
4675 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
4676 PACKET_Qbtrace_conf_pt_size
},
4677 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
4678 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
4679 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
4682 static char *remote_support_xml
;
4684 /* Register string appended to "xmlRegisters=" in qSupported query. */
4687 register_remote_support_xml (const char *xml
)
4689 #if defined(HAVE_LIBEXPAT)
4690 if (remote_support_xml
== NULL
)
4691 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
4694 char *copy
= xstrdup (remote_support_xml
+ 13);
4695 char *p
= strtok (copy
, ",");
4699 if (strcmp (p
, xml
) == 0)
4706 while ((p
= strtok (NULL
, ",")) != NULL
);
4709 remote_support_xml
= reconcat (remote_support_xml
,
4710 remote_support_xml
, ",", xml
,
4717 remote_query_supported_append (char *msg
, const char *append
)
4720 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
4722 return xstrdup (append
);
4726 remote_query_supported (void)
4728 struct remote_state
*rs
= get_remote_state ();
4731 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
4733 /* The packet support flags are handled differently for this packet
4734 than for most others. We treat an error, a disabled packet, and
4735 an empty response identically: any features which must be reported
4736 to be used will be automatically disabled. An empty buffer
4737 accomplishes this, since that is also the representation for a list
4738 containing no features. */
4741 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
4744 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
4746 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
4747 q
= remote_query_supported_append (q
, "multiprocess+");
4749 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4750 q
= remote_query_supported_append (q
, "swbreak+");
4751 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4752 q
= remote_query_supported_append (q
, "hwbreak+");
4754 q
= remote_query_supported_append (q
, "qRelocInsn+");
4756 if (packet_set_cmd_state (PACKET_fork_event_feature
)
4757 != AUTO_BOOLEAN_FALSE
)
4758 q
= remote_query_supported_append (q
, "fork-events+");
4759 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
4760 != AUTO_BOOLEAN_FALSE
)
4761 q
= remote_query_supported_append (q
, "vfork-events+");
4762 if (packet_set_cmd_state (PACKET_exec_event_feature
)
4763 != AUTO_BOOLEAN_FALSE
)
4764 q
= remote_query_supported_append (q
, "exec-events+");
4766 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
4767 q
= remote_query_supported_append (q
, "vContSupported+");
4769 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
4770 q
= remote_query_supported_append (q
, "QThreadEvents+");
4772 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
4773 q
= remote_query_supported_append (q
, "no-resumed+");
4775 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4776 the qSupported:xmlRegisters=i386 handling. */
4777 if (remote_support_xml
!= NULL
)
4778 q
= remote_query_supported_append (q
, remote_support_xml
);
4780 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
4783 do_cleanups (old_chain
);
4785 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4787 /* If an error occured, warn, but do not return - just reset the
4788 buffer to empty and go on to disable features. */
4789 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
4792 warning (_("Remote failure reply: %s"), rs
->buf
);
4797 memset (seen
, 0, sizeof (seen
));
4802 enum packet_support is_supported
;
4803 char *p
, *end
, *name_end
, *value
;
4805 /* First separate out this item from the rest of the packet. If
4806 there's another item after this, we overwrite the separator
4807 (terminated strings are much easier to work with). */
4809 end
= strchr (p
, ';');
4812 end
= p
+ strlen (p
);
4822 warning (_("empty item in \"qSupported\" response"));
4827 name_end
= strchr (p
, '=');
4830 /* This is a name=value entry. */
4831 is_supported
= PACKET_ENABLE
;
4832 value
= name_end
+ 1;
4841 is_supported
= PACKET_ENABLE
;
4845 is_supported
= PACKET_DISABLE
;
4849 is_supported
= PACKET_SUPPORT_UNKNOWN
;
4853 warning (_("unrecognized item \"%s\" "
4854 "in \"qSupported\" response"), p
);
4860 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4861 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
4863 const struct protocol_feature
*feature
;
4866 feature
= &remote_protocol_features
[i
];
4867 feature
->func (feature
, is_supported
, value
);
4872 /* If we increased the packet size, make sure to increase the global
4873 buffer size also. We delay this until after parsing the entire
4874 qSupported packet, because this is the same buffer we were
4876 if (rs
->buf_size
< rs
->explicit_packet_size
)
4878 rs
->buf_size
= rs
->explicit_packet_size
;
4879 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
4882 /* Handle the defaults for unmentioned features. */
4883 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4886 const struct protocol_feature
*feature
;
4888 feature
= &remote_protocol_features
[i
];
4889 feature
->func (feature
, feature
->default_support
, NULL
);
4893 /* Serial QUIT handler for the remote serial descriptor.
4895 Defers handling a Ctrl-C until we're done with the current
4896 command/response packet sequence, unless:
4898 - We're setting up the connection. Don't send a remote interrupt
4899 request, as we're not fully synced yet. Quit immediately
4902 - The target has been resumed in the foreground
4903 (target_terminal::is_ours is false) with a synchronous resume
4904 packet, and we're blocked waiting for the stop reply, thus a
4905 Ctrl-C should be immediately sent to the target.
4907 - We get a second Ctrl-C while still within the same serial read or
4908 write. In that case the serial is seemingly wedged --- offer to
4911 - We see a second Ctrl-C without target response, after having
4912 previously interrupted the target. In that case the target/stub
4913 is probably wedged --- offer to quit/disconnect.
4917 remote_serial_quit_handler (void)
4919 struct remote_state
*rs
= get_remote_state ();
4921 if (check_quit_flag ())
4923 /* If we're starting up, we're not fully synced yet. Quit
4925 if (rs
->starting_up
)
4927 else if (rs
->got_ctrlc_during_io
)
4929 if (query (_("The target is not responding to GDB commands.\n"
4930 "Stop debugging it? ")))
4931 remote_unpush_and_throw ();
4933 /* If ^C has already been sent once, offer to disconnect. */
4934 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
4936 /* All-stop protocol, and blocked waiting for stop reply. Send
4937 an interrupt request. */
4938 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
4939 target_interrupt (inferior_ptid
);
4941 rs
->got_ctrlc_during_io
= 1;
4945 /* Remove any of the remote.c targets from target stack. Upper targets depend
4946 on it so remove them first. */
4949 remote_unpush_target (void)
4951 pop_all_targets_at_and_above (process_stratum
);
4955 remote_unpush_and_throw (void)
4957 remote_unpush_target ();
4958 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
4962 remote_open_1 (const char *name
, int from_tty
,
4963 struct target_ops
*target
, int extended_p
)
4965 struct remote_state
*rs
= get_remote_state ();
4968 error (_("To open a remote debug connection, you need to specify what\n"
4969 "serial device is attached to the remote system\n"
4970 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4972 /* See FIXME above. */
4973 if (!target_async_permitted
)
4974 wait_forever_enabled_p
= 1;
4976 /* If we're connected to a running target, target_preopen will kill it.
4977 Ask this question first, before target_preopen has a chance to kill
4979 if (rs
->remote_desc
!= NULL
&& !have_inferiors ())
4982 && !query (_("Already connected to a remote target. Disconnect? ")))
4983 error (_("Still connected."));
4986 /* Here the possibly existing remote target gets unpushed. */
4987 target_preopen (from_tty
);
4989 /* Make sure we send the passed signals list the next time we resume. */
4990 xfree (rs
->last_pass_packet
);
4991 rs
->last_pass_packet
= NULL
;
4993 /* Make sure we send the program signals list the next time we
4995 xfree (rs
->last_program_signals_packet
);
4996 rs
->last_program_signals_packet
= NULL
;
4998 remote_fileio_reset ();
4999 reopen_exec_file ();
5002 rs
->remote_desc
= remote_serial_open (name
);
5003 if (!rs
->remote_desc
)
5004 perror_with_name (name
);
5006 if (baud_rate
!= -1)
5008 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5010 /* The requested speed could not be set. Error out to
5011 top level after closing remote_desc. Take care to
5012 set remote_desc to NULL to avoid closing remote_desc
5014 serial_close (rs
->remote_desc
);
5015 rs
->remote_desc
= NULL
;
5016 perror_with_name (name
);
5020 serial_setparity (rs
->remote_desc
, serial_parity
);
5021 serial_raw (rs
->remote_desc
);
5023 /* If there is something sitting in the buffer we might take it as a
5024 response to a command, which would be bad. */
5025 serial_flush_input (rs
->remote_desc
);
5029 puts_filtered ("Remote debugging using ");
5030 puts_filtered (name
);
5031 puts_filtered ("\n");
5033 push_target (target
); /* Switch to using remote target now. */
5035 /* Register extra event sources in the event loop. */
5036 remote_async_inferior_event_token
5037 = create_async_event_handler (remote_async_inferior_event_handler
,
5039 rs
->notif_state
= remote_notif_state_allocate ();
5041 /* Reset the target state; these things will be queried either by
5042 remote_query_supported or as they are needed. */
5043 reset_all_packet_configs_support ();
5044 rs
->cached_wait_status
= 0;
5045 rs
->explicit_packet_size
= 0;
5047 rs
->extended
= extended_p
;
5048 rs
->waiting_for_stop_reply
= 0;
5049 rs
->ctrlc_pending_p
= 0;
5050 rs
->got_ctrlc_during_io
= 0;
5052 rs
->general_thread
= not_sent_ptid
;
5053 rs
->continue_thread
= not_sent_ptid
;
5054 rs
->remote_traceframe_number
= -1;
5056 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5058 /* Probe for ability to use "ThreadInfo" query, as required. */
5059 rs
->use_threadinfo_query
= 1;
5060 rs
->use_threadextra_query
= 1;
5062 readahead_cache_invalidate ();
5064 if (target_async_permitted
)
5066 /* FIXME: cagney/1999-09-23: During the initial connection it is
5067 assumed that the target is already ready and able to respond to
5068 requests. Unfortunately remote_start_remote() eventually calls
5069 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5070 around this. Eventually a mechanism that allows
5071 wait_for_inferior() to expect/get timeouts will be
5073 wait_forever_enabled_p
= 0;
5076 /* First delete any symbols previously loaded from shared libraries. */
5077 no_shared_libraries (NULL
, 0);
5080 init_thread_list ();
5082 /* Start the remote connection. If error() or QUIT, discard this
5083 target (we'd otherwise be in an inconsistent state) and then
5084 propogate the error on up the exception chain. This ensures that
5085 the caller doesn't stumble along blindly assuming that the
5086 function succeeded. The CLI doesn't have this problem but other
5087 UI's, such as MI do.
5089 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5090 this function should return an error indication letting the
5091 caller restore the previous state. Unfortunately the command
5092 ``target remote'' is directly wired to this function making that
5093 impossible. On a positive note, the CLI side of this problem has
5094 been fixed - the function set_cmd_context() makes it possible for
5095 all the ``target ....'' commands to share a common callback
5096 function. See cli-dump.c. */
5101 remote_start_remote (from_tty
, target
, extended_p
);
5103 CATCH (ex
, RETURN_MASK_ALL
)
5105 /* Pop the partially set up target - unless something else did
5106 already before throwing the exception. */
5107 if (rs
->remote_desc
!= NULL
)
5108 remote_unpush_target ();
5109 if (target_async_permitted
)
5110 wait_forever_enabled_p
= 1;
5111 throw_exception (ex
);
5116 remote_btrace_reset ();
5118 if (target_async_permitted
)
5119 wait_forever_enabled_p
= 1;
5122 /* Detach the specified process. */
5125 remote_detach_pid (int pid
)
5127 struct remote_state
*rs
= get_remote_state ();
5129 if (remote_multi_process_p (rs
))
5130 xsnprintf (rs
->buf
, get_remote_packet_size (), "D;%x", pid
);
5132 strcpy (rs
->buf
, "D");
5135 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5137 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5139 else if (rs
->buf
[0] == '\0')
5140 error (_("Remote doesn't know how to detach"));
5142 error (_("Can't detach process."));
5145 /* This detaches a program to which we previously attached, using
5146 inferior_ptid to identify the process. After this is done, GDB
5147 can be used to debug some other program. We better not have left
5148 any breakpoints in the target program or it'll die when it hits
5152 remote_detach_1 (const char *args
, int from_tty
)
5154 int pid
= ptid_get_pid (inferior_ptid
);
5155 struct remote_state
*rs
= get_remote_state ();
5156 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
5160 error (_("Argument given to \"detach\" when remotely debugging."));
5162 if (!target_has_execution
)
5163 error (_("No process to detach from."));
5165 target_announce_detach (from_tty
);
5167 /* Tell the remote target to detach. */
5168 remote_detach_pid (pid
);
5170 /* Exit only if this is the only active inferior. */
5171 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors () == 1)
5172 puts_filtered (_("Ending remote debugging.\n"));
5174 /* Check to see if we are detaching a fork parent. Note that if we
5175 are detaching a fork child, tp == NULL. */
5176 is_fork_parent
= (tp
!= NULL
5177 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5179 /* If doing detach-on-fork, we don't mourn, because that will delete
5180 breakpoints that should be available for the followed inferior. */
5181 if (!is_fork_parent
)
5182 target_mourn_inferior (inferior_ptid
);
5185 inferior_ptid
= null_ptid
;
5186 detach_inferior (pid
);
5191 remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5193 remote_detach_1 (args
, from_tty
);
5197 extended_remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5199 remote_detach_1 (args
, from_tty
);
5202 /* Target follow-fork function for remote targets. On entry, and
5203 at return, the current inferior is the fork parent.
5205 Note that although this is currently only used for extended-remote,
5206 it is named remote_follow_fork in anticipation of using it for the
5207 remote target as well. */
5210 remote_follow_fork (struct target_ops
*ops
, int follow_child
,
5213 struct remote_state
*rs
= get_remote_state ();
5214 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5216 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5217 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5219 /* When following the parent and detaching the child, we detach
5220 the child here. For the case of following the child and
5221 detaching the parent, the detach is done in the target-
5222 independent follow fork code in infrun.c. We can't use
5223 target_detach when detaching an unfollowed child because
5224 the client side doesn't know anything about the child. */
5225 if (detach_fork
&& !follow_child
)
5227 /* Detach the fork child. */
5231 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5232 child_pid
= ptid_get_pid (child_ptid
);
5234 remote_detach_pid (child_pid
);
5235 detach_inferior (child_pid
);
5241 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5242 in the program space of the new inferior. On entry and at return the
5243 current inferior is the exec'ing inferior. INF is the new exec'd
5244 inferior, which may be the same as the exec'ing inferior unless
5245 follow-exec-mode is "new". */
5248 remote_follow_exec (struct target_ops
*ops
,
5249 struct inferior
*inf
, char *execd_pathname
)
5251 /* We know that this is a target file name, so if it has the "target:"
5252 prefix we strip it off before saving it in the program space. */
5253 if (is_target_filename (execd_pathname
))
5254 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5256 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5259 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5262 remote_disconnect (struct target_ops
*target
, const char *args
, int from_tty
)
5265 error (_("Argument given to \"disconnect\" when remotely debugging."));
5267 /* Make sure we unpush even the extended remote targets. Calling
5268 target_mourn_inferior won't unpush, and remote_mourn won't
5269 unpush if there is more than one inferior left. */
5270 unpush_target (target
);
5271 generic_mourn_inferior ();
5274 puts_filtered ("Ending remote debugging.\n");
5277 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5278 be chatty about it. */
5281 extended_remote_attach (struct target_ops
*target
, const char *args
,
5284 struct remote_state
*rs
= get_remote_state ();
5286 char *wait_status
= NULL
;
5288 pid
= parse_pid_to_attach (args
);
5290 /* Remote PID can be freely equal to getpid, do not check it here the same
5291 way as in other targets. */
5293 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5294 error (_("This target does not support attaching to a process"));
5298 char *exec_file
= get_exec_file (0);
5301 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5302 target_pid_to_str (pid_to_ptid (pid
)));
5304 printf_unfiltered (_("Attaching to %s\n"),
5305 target_pid_to_str (pid_to_ptid (pid
)));
5307 gdb_flush (gdb_stdout
);
5310 xsnprintf (rs
->buf
, get_remote_packet_size (), "vAttach;%x", pid
);
5312 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5314 switch (packet_ok (rs
->buf
,
5315 &remote_protocol_packets
[PACKET_vAttach
]))
5318 if (!target_is_non_stop_p ())
5320 /* Save the reply for later. */
5321 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
5322 strcpy (wait_status
, rs
->buf
);
5324 else if (strcmp (rs
->buf
, "OK") != 0)
5325 error (_("Attaching to %s failed with: %s"),
5326 target_pid_to_str (pid_to_ptid (pid
)),
5329 case PACKET_UNKNOWN
:
5330 error (_("This target does not support attaching to a process"));
5332 error (_("Attaching to %s failed"),
5333 target_pid_to_str (pid_to_ptid (pid
)));
5336 set_current_inferior (remote_add_inferior (0, pid
, 1, 0));
5338 inferior_ptid
= pid_to_ptid (pid
);
5340 if (target_is_non_stop_p ())
5342 struct thread_info
*thread
;
5344 /* Get list of threads. */
5345 remote_update_thread_list (target
);
5347 thread
= first_thread_of_process (pid
);
5349 inferior_ptid
= thread
->ptid
;
5351 inferior_ptid
= pid_to_ptid (pid
);
5353 /* Invalidate our notion of the remote current thread. */
5354 record_currthread (rs
, minus_one_ptid
);
5358 /* Now, if we have thread information, update inferior_ptid. */
5359 inferior_ptid
= remote_current_thread (inferior_ptid
);
5361 /* Add the main thread to the thread list. */
5362 add_thread_silent (inferior_ptid
);
5365 /* Next, if the target can specify a description, read it. We do
5366 this before anything involving memory or registers. */
5367 target_find_description ();
5369 if (!target_is_non_stop_p ())
5371 /* Use the previously fetched status. */
5372 gdb_assert (wait_status
!= NULL
);
5374 if (target_can_async_p ())
5376 struct notif_event
*reply
5377 = remote_notif_parse (¬if_client_stop
, wait_status
);
5379 push_stop_reply ((struct stop_reply
*) reply
);
5385 gdb_assert (wait_status
!= NULL
);
5386 strcpy (rs
->buf
, wait_status
);
5387 rs
->cached_wait_status
= 1;
5391 gdb_assert (wait_status
== NULL
);
5394 /* Implementation of the to_post_attach method. */
5397 extended_remote_post_attach (struct target_ops
*ops
, int pid
)
5399 /* Get text, data & bss offsets. */
5402 /* In certain cases GDB might not have had the chance to start
5403 symbol lookup up until now. This could happen if the debugged
5404 binary is not using shared libraries, the vsyscall page is not
5405 present (on Linux) and the binary itself hadn't changed since the
5406 debugging process was started. */
5407 if (symfile_objfile
!= NULL
)
5408 remote_check_symbols();
5412 /* Check for the availability of vCont. This function should also check
5416 remote_vcont_probe (struct remote_state
*rs
)
5420 strcpy (rs
->buf
, "vCont?");
5422 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5425 /* Make sure that the features we assume are supported. */
5426 if (startswith (buf
, "vCont"))
5429 int support_c
, support_C
;
5431 rs
->supports_vCont
.s
= 0;
5432 rs
->supports_vCont
.S
= 0;
5435 rs
->supports_vCont
.t
= 0;
5436 rs
->supports_vCont
.r
= 0;
5437 while (p
&& *p
== ';')
5440 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5441 rs
->supports_vCont
.s
= 1;
5442 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5443 rs
->supports_vCont
.S
= 1;
5444 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5446 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5448 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5449 rs
->supports_vCont
.t
= 1;
5450 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5451 rs
->supports_vCont
.r
= 1;
5453 p
= strchr (p
, ';');
5456 /* If c, and C are not all supported, we can't use vCont. Clearing
5457 BUF will make packet_ok disable the packet. */
5458 if (!support_c
|| !support_C
)
5462 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
5465 /* Helper function for building "vCont" resumptions. Write a
5466 resumption to P. ENDP points to one-passed-the-end of the buffer
5467 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5468 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5469 resumed thread should be single-stepped and/or signalled. If PTID
5470 equals minus_one_ptid, then all threads are resumed; if PTID
5471 represents a process, then all threads of the process are resumed;
5472 the thread to be stepped and/or signalled is given in the global
5476 append_resumption (char *p
, char *endp
,
5477 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5479 struct remote_state
*rs
= get_remote_state ();
5481 if (step
&& siggnal
!= GDB_SIGNAL_0
)
5482 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
5484 /* GDB is willing to range step. */
5485 && use_range_stepping
5486 /* Target supports range stepping. */
5487 && rs
->supports_vCont
.r
5488 /* We don't currently support range stepping multiple
5489 threads with a wildcard (though the protocol allows it,
5490 so stubs shouldn't make an active effort to forbid
5492 && !(remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5494 struct thread_info
*tp
;
5496 if (ptid_equal (ptid
, minus_one_ptid
))
5498 /* If we don't know about the target thread's tid, then
5499 we're resuming magic_null_ptid (see caller). */
5500 tp
= find_thread_ptid (magic_null_ptid
);
5503 tp
= find_thread_ptid (ptid
);
5504 gdb_assert (tp
!= NULL
);
5506 if (tp
->control
.may_range_step
)
5508 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5510 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
5511 phex_nz (tp
->control
.step_range_start
,
5513 phex_nz (tp
->control
.step_range_end
,
5517 p
+= xsnprintf (p
, endp
- p
, ";s");
5520 p
+= xsnprintf (p
, endp
- p
, ";s");
5521 else if (siggnal
!= GDB_SIGNAL_0
)
5522 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
5524 p
+= xsnprintf (p
, endp
- p
, ";c");
5526 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
5530 /* All (-1) threads of process. */
5531 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5533 p
+= xsnprintf (p
, endp
- p
, ":");
5534 p
= write_ptid (p
, endp
, nptid
);
5536 else if (!ptid_equal (ptid
, minus_one_ptid
))
5538 p
+= xsnprintf (p
, endp
- p
, ":");
5539 p
= write_ptid (p
, endp
, ptid
);
5545 /* Clear the thread's private info on resume. */
5548 resume_clear_thread_private_info (struct thread_info
*thread
)
5550 if (thread
->priv
!= NULL
)
5552 thread
->priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
5553 thread
->priv
->watch_data_address
= 0;
5557 /* Append a vCont continue-with-signal action for threads that have a
5558 non-zero stop signal. */
5561 append_pending_thread_resumptions (char *p
, char *endp
, ptid_t ptid
)
5563 struct thread_info
*thread
;
5565 ALL_NON_EXITED_THREADS (thread
)
5566 if (ptid_match (thread
->ptid
, ptid
)
5567 && !ptid_equal (inferior_ptid
, thread
->ptid
)
5568 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
5570 p
= append_resumption (p
, endp
, thread
->ptid
,
5571 0, thread
->suspend
.stop_signal
);
5572 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
5573 resume_clear_thread_private_info (thread
);
5579 /* Set the target running, using the packets that use Hc
5583 remote_resume_with_hc (struct target_ops
*ops
,
5584 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5586 struct remote_state
*rs
= get_remote_state ();
5587 struct thread_info
*thread
;
5590 rs
->last_sent_signal
= siggnal
;
5591 rs
->last_sent_step
= step
;
5593 /* The c/s/C/S resume packets use Hc, so set the continue
5595 if (ptid_equal (ptid
, minus_one_ptid
))
5596 set_continue_thread (any_thread_ptid
);
5598 set_continue_thread (ptid
);
5600 ALL_NON_EXITED_THREADS (thread
)
5601 resume_clear_thread_private_info (thread
);
5604 if (execution_direction
== EXEC_REVERSE
)
5606 /* We don't pass signals to the target in reverse exec mode. */
5607 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
5608 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5611 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
5612 error (_("Remote reverse-step not supported."));
5613 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
5614 error (_("Remote reverse-continue not supported."));
5616 strcpy (buf
, step
? "bs" : "bc");
5618 else if (siggnal
!= GDB_SIGNAL_0
)
5620 buf
[0] = step
? 'S' : 'C';
5621 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
5622 buf
[2] = tohex (((int) siggnal
) & 0xf);
5626 strcpy (buf
, step
? "s" : "c");
5631 /* Resume the remote inferior by using a "vCont" packet. The thread
5632 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5633 resumed thread should be single-stepped and/or signalled. If PTID
5634 equals minus_one_ptid, then all threads are resumed; the thread to
5635 be stepped and/or signalled is given in the global INFERIOR_PTID.
5636 This function returns non-zero iff it resumes the inferior.
5638 This function issues a strict subset of all possible vCont commands
5642 remote_resume_with_vcont (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5644 struct remote_state
*rs
= get_remote_state ();
5648 /* No reverse execution actions defined for vCont. */
5649 if (execution_direction
== EXEC_REVERSE
)
5652 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5653 remote_vcont_probe (rs
);
5655 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
5659 endp
= rs
->buf
+ get_remote_packet_size ();
5661 /* If we could generate a wider range of packets, we'd have to worry
5662 about overflowing BUF. Should there be a generic
5663 "multi-part-packet" packet? */
5665 p
+= xsnprintf (p
, endp
- p
, "vCont");
5667 if (ptid_equal (ptid
, magic_null_ptid
))
5669 /* MAGIC_NULL_PTID means that we don't have any active threads,
5670 so we don't have any TID numbers the inferior will
5671 understand. Make sure to only send forms that do not specify
5673 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
5675 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
5677 /* Resume all threads (of all processes, or of a single
5678 process), with preference for INFERIOR_PTID. This assumes
5679 inferior_ptid belongs to the set of all threads we are about
5681 if (step
|| siggnal
!= GDB_SIGNAL_0
)
5683 /* Step inferior_ptid, with or without signal. */
5684 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
5687 /* Also pass down any pending signaled resumption for other
5688 threads not the current. */
5689 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
5691 /* And continue others without a signal. */
5692 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
5696 /* Scheduler locking; resume only PTID. */
5697 append_resumption (p
, endp
, ptid
, step
, siggnal
);
5700 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
5703 if (target_is_non_stop_p ())
5705 /* In non-stop, the stub replies to vCont with "OK". The stop
5706 reply will be reported asynchronously by means of a `%Stop'
5708 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5709 if (strcmp (rs
->buf
, "OK") != 0)
5710 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5716 /* Tell the remote machine to resume. */
5719 remote_resume (struct target_ops
*ops
,
5720 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5722 struct remote_state
*rs
= get_remote_state ();
5724 /* When connected in non-stop mode, the core resumes threads
5725 individually. Resuming remote threads directly in target_resume
5726 would thus result in sending one packet per thread. Instead, to
5727 minimize roundtrip latency, here we just store the resume
5728 request; the actual remote resumption will be done in
5729 target_commit_resume / remote_commit_resume, where we'll be able
5730 to do vCont action coalescing. */
5731 if (target_is_non_stop_p () && execution_direction
!= EXEC_REVERSE
)
5733 struct private_thread_info
*remote_thr
;
5735 if (ptid_equal (minus_one_ptid
, ptid
) || ptid_is_pid (ptid
))
5736 remote_thr
= get_private_info_ptid (inferior_ptid
);
5738 remote_thr
= get_private_info_ptid (ptid
);
5739 remote_thr
->last_resume_step
= step
;
5740 remote_thr
->last_resume_sig
= siggnal
;
5744 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5745 (explained in remote-notif.c:handle_notification) so
5746 remote_notif_process is not called. We need find a place where
5747 it is safe to start a 'vNotif' sequence. It is good to do it
5748 before resuming inferior, because inferior was stopped and no RSP
5749 traffic at that moment. */
5750 if (!target_is_non_stop_p ())
5751 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
5753 rs
->last_resume_exec_dir
= execution_direction
;
5755 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
5756 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
5757 remote_resume_with_hc (ops
, ptid
, step
, siggnal
);
5759 /* We are about to start executing the inferior, let's register it
5760 with the event loop. NOTE: this is the one place where all the
5761 execution commands end up. We could alternatively do this in each
5762 of the execution commands in infcmd.c. */
5763 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5764 into infcmd.c in order to allow inferior function calls to work
5765 NOT asynchronously. */
5766 if (target_can_async_p ())
5769 /* We've just told the target to resume. The remote server will
5770 wait for the inferior to stop, and then send a stop reply. In
5771 the mean time, we can't start another command/query ourselves
5772 because the stub wouldn't be ready to process it. This applies
5773 only to the base all-stop protocol, however. In non-stop (which
5774 only supports vCont), the stub replies with an "OK", and is
5775 immediate able to process further serial input. */
5776 if (!target_is_non_stop_p ())
5777 rs
->waiting_for_stop_reply
= 1;
5780 static void check_pending_events_prevent_wildcard_vcont
5781 (int *may_global_wildcard_vcont
);
5782 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
5784 /* Private per-inferior info for target remote processes. */
5786 struct remote_inferior
: public private_inferior
5788 /* Whether we can send a wildcard vCont for this process. */
5789 bool may_wildcard_vcont
= true;
5792 /* Get the remote private inferior data associated to INF. */
5794 static remote_inferior
*
5795 get_remote_inferior (inferior
*inf
)
5797 if (inf
->priv
== NULL
)
5798 inf
->priv
.reset (new remote_inferior
);
5800 return static_cast<remote_inferior
*> (inf
->priv
.get ());
5803 /* Structure used to track the construction of a vCont packet in the
5804 outgoing packet buffer. This is used to send multiple vCont
5805 packets if we have more actions than would fit a single packet. */
5807 struct vcont_builder
5809 /* Pointer to the first action. P points here if no action has been
5813 /* Where the next action will be appended. */
5816 /* The end of the buffer. Must never write past this. */
5820 /* Prepare the outgoing buffer for a new vCont packet. */
5823 vcont_builder_restart (struct vcont_builder
*builder
)
5825 struct remote_state
*rs
= get_remote_state ();
5827 builder
->p
= rs
->buf
;
5828 builder
->endp
= rs
->buf
+ get_remote_packet_size ();
5829 builder
->p
+= xsnprintf (builder
->p
, builder
->endp
- builder
->p
, "vCont");
5830 builder
->first_action
= builder
->p
;
5833 /* If the vCont packet being built has any action, send it to the
5837 vcont_builder_flush (struct vcont_builder
*builder
)
5839 struct remote_state
*rs
;
5841 if (builder
->p
== builder
->first_action
)
5844 rs
= get_remote_state ();
5846 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5847 if (strcmp (rs
->buf
, "OK") != 0)
5848 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5851 /* The largest action is range-stepping, with its two addresses. This
5852 is more than sufficient. If a new, bigger action is created, it'll
5853 quickly trigger a failed assertion in append_resumption (and we'll
5855 #define MAX_ACTION_SIZE 200
5857 /* Append a new vCont action in the outgoing packet being built. If
5858 the action doesn't fit the packet along with previous actions, push
5859 what we've got so far to the remote end and start over a new vCont
5860 packet (with the new action). */
5863 vcont_builder_push_action (struct vcont_builder
*builder
,
5864 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5866 char buf
[MAX_ACTION_SIZE
+ 1];
5870 endp
= append_resumption (buf
, buf
+ sizeof (buf
),
5871 ptid
, step
, siggnal
);
5873 /* Check whether this new action would fit in the vCont packet along
5874 with previous actions. If not, send what we've got so far and
5875 start a new vCont packet. */
5877 if (rsize
> builder
->endp
- builder
->p
)
5879 vcont_builder_flush (builder
);
5880 vcont_builder_restart (builder
);
5882 /* Should now fit. */
5883 gdb_assert (rsize
<= builder
->endp
- builder
->p
);
5886 memcpy (builder
->p
, buf
, rsize
);
5887 builder
->p
+= rsize
;
5891 /* to_commit_resume implementation. */
5894 remote_commit_resume (struct target_ops
*ops
)
5896 struct remote_state
*rs
= get_remote_state ();
5897 struct inferior
*inf
;
5898 struct thread_info
*tp
;
5899 int any_process_wildcard
;
5900 int may_global_wildcard_vcont
;
5901 struct vcont_builder vcont_builder
;
5903 /* If connected in all-stop mode, we'd send the remote resume
5904 request directly from remote_resume. Likewise if
5905 reverse-debugging, as there are no defined vCont actions for
5906 reverse execution. */
5907 if (!target_is_non_stop_p () || execution_direction
== EXEC_REVERSE
)
5910 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
5911 instead of resuming all threads of each process individually.
5912 However, if any thread of a process must remain halted, we can't
5913 send wildcard resumes and must send one action per thread.
5915 Care must be taken to not resume threads/processes the server
5916 side already told us are stopped, but the core doesn't know about
5917 yet, because the events are still in the vStopped notification
5920 #1 => vCont s:p1.1;c
5922 #3 <= %Stopped T05 p1.1
5927 #8 (infrun handles the stop for p1.1 and continues stepping)
5928 #9 => vCont s:p1.1;c
5930 The last vCont above would resume thread p1.2 by mistake, because
5931 the server has no idea that the event for p1.2 had not been
5934 The server side must similarly ignore resume actions for the
5935 thread that has a pending %Stopped notification (and any other
5936 threads with events pending), until GDB acks the notification
5937 with vStopped. Otherwise, e.g., the following case is
5940 #1 => g (or any other packet)
5942 #3 <= %Stopped T05 p1.2
5943 #4 => vCont s:p1.1;c
5946 Above, the server must not resume thread p1.2. GDB can't know
5947 that p1.2 stopped until it acks the %Stopped notification, and
5948 since from GDB's perspective all threads should be running, it
5951 Finally, special care must also be given to handling fork/vfork
5952 events. A (v)fork event actually tells us that two processes
5953 stopped -- the parent and the child. Until we follow the fork,
5954 we must not resume the child. Therefore, if we have a pending
5955 fork follow, we must not send a global wildcard resume action
5956 (vCont;c). We can still send process-wide wildcards though. */
5958 /* Start by assuming a global wildcard (vCont;c) is possible. */
5959 may_global_wildcard_vcont
= 1;
5961 /* And assume every process is individually wildcard-able too. */
5962 ALL_NON_EXITED_INFERIORS (inf
)
5964 remote_inferior
*priv
= get_remote_inferior (inf
);
5966 priv
->may_wildcard_vcont
= true;
5969 /* Check for any pending events (not reported or processed yet) and
5970 disable process and global wildcard resumes appropriately. */
5971 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
5973 ALL_NON_EXITED_THREADS (tp
)
5975 /* If a thread of a process is not meant to be resumed, then we
5976 can't wildcard that process. */
5979 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
5981 /* And if we can't wildcard a process, we can't wildcard
5982 everything either. */
5983 may_global_wildcard_vcont
= 0;
5987 /* If a thread is the parent of an unfollowed fork, then we
5988 can't do a global wildcard, as that would resume the fork
5990 if (is_pending_fork_parent_thread (tp
))
5991 may_global_wildcard_vcont
= 0;
5994 /* Now let's build the vCont packet(s). Actions must be appended
5995 from narrower to wider scopes (thread -> process -> global). If
5996 we end up with too many actions for a single packet vcont_builder
5997 flushes the current vCont packet to the remote side and starts a
5999 vcont_builder_restart (&vcont_builder
);
6001 /* Threads first. */
6002 ALL_NON_EXITED_THREADS (tp
)
6004 struct private_thread_info
*remote_thr
= tp
->priv
;
6006 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
6009 gdb_assert (!thread_is_in_step_over_chain (tp
));
6011 if (!remote_thr
->last_resume_step
6012 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
6013 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6015 /* We'll send a wildcard resume instead. */
6016 remote_thr
->vcont_resumed
= 1;
6020 vcont_builder_push_action (&vcont_builder
, tp
->ptid
,
6021 remote_thr
->last_resume_step
,
6022 remote_thr
->last_resume_sig
);
6023 remote_thr
->vcont_resumed
= 1;
6026 /* Now check whether we can send any process-wide wildcard. This is
6027 to avoid sending a global wildcard in the case nothing is
6028 supposed to be resumed. */
6029 any_process_wildcard
= 0;
6031 ALL_NON_EXITED_INFERIORS (inf
)
6033 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6035 any_process_wildcard
= 1;
6040 if (any_process_wildcard
)
6042 /* If all processes are wildcard-able, then send a single "c"
6043 action, otherwise, send an "all (-1) threads of process"
6044 continue action for each running process, if any. */
6045 if (may_global_wildcard_vcont
)
6047 vcont_builder_push_action (&vcont_builder
, minus_one_ptid
,
6052 ALL_NON_EXITED_INFERIORS (inf
)
6054 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6056 vcont_builder_push_action (&vcont_builder
,
6057 pid_to_ptid (inf
->pid
),
6064 vcont_builder_flush (&vcont_builder
);
6069 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6070 thread, all threads of a remote process, or all threads of all
6074 remote_stop_ns (ptid_t ptid
)
6076 struct remote_state
*rs
= get_remote_state ();
6078 char *endp
= rs
->buf
+ get_remote_packet_size ();
6080 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6081 remote_vcont_probe (rs
);
6083 if (!rs
->supports_vCont
.t
)
6084 error (_("Remote server does not support stopping threads"));
6086 if (ptid_equal (ptid
, minus_one_ptid
)
6087 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
6088 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6093 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6095 if (ptid_is_pid (ptid
))
6096 /* All (-1) threads of process. */
6097 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
6100 /* Small optimization: if we already have a stop reply for
6101 this thread, no use in telling the stub we want this
6103 if (peek_stop_reply (ptid
))
6109 write_ptid (p
, endp
, nptid
);
6112 /* In non-stop, we get an immediate OK reply. The stop reply will
6113 come in asynchronously by notification. */
6115 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6116 if (strcmp (rs
->buf
, "OK") != 0)
6117 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
6120 /* All-stop version of target_interrupt. Sends a break or a ^C to
6121 interrupt the remote target. It is undefined which thread of which
6122 process reports the interrupt. */
6125 remote_interrupt_as (void)
6127 struct remote_state
*rs
= get_remote_state ();
6129 rs
->ctrlc_pending_p
= 1;
6131 /* If the inferior is stopped already, but the core didn't know
6132 about it yet, just ignore the request. The cached wait status
6133 will be collected in remote_wait. */
6134 if (rs
->cached_wait_status
)
6137 /* Send interrupt_sequence to remote target. */
6138 send_interrupt_sequence ();
6141 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6142 the remote target. It is undefined which thread of which process
6143 reports the interrupt. Throws an error if the packet is not
6144 supported by the server. */
6147 remote_interrupt_ns (void)
6149 struct remote_state
*rs
= get_remote_state ();
6151 char *endp
= rs
->buf
+ get_remote_packet_size ();
6153 xsnprintf (p
, endp
- p
, "vCtrlC");
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);
6160 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6164 case PACKET_UNKNOWN
:
6165 error (_("No support for interrupting the remote target."));
6167 error (_("Interrupting target failed: %s"), rs
->buf
);
6171 /* Implement the to_stop function for the remote targets. */
6174 remote_stop (struct target_ops
*self
, ptid_t ptid
)
6177 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6179 if (target_is_non_stop_p ())
6180 remote_stop_ns (ptid
);
6183 /* We don't currently have a way to transparently pause the
6184 remote target in all-stop mode. Interrupt it instead. */
6185 remote_interrupt_as ();
6189 /* Implement the to_interrupt function for the remote targets. */
6192 remote_interrupt (struct target_ops
*self
, ptid_t ptid
)
6194 struct remote_state
*rs
= get_remote_state ();
6197 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6199 if (target_is_non_stop_p ())
6200 remote_interrupt_ns ();
6202 remote_interrupt_as ();
6205 /* Implement the to_pass_ctrlc function for the remote targets. */
6208 remote_pass_ctrlc (struct target_ops
*self
)
6210 struct remote_state
*rs
= get_remote_state ();
6213 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6215 /* If we're starting up, we're not fully synced yet. Quit
6217 if (rs
->starting_up
)
6219 /* If ^C has already been sent once, offer to disconnect. */
6220 else if (rs
->ctrlc_pending_p
)
6223 target_interrupt (inferior_ptid
);
6226 /* Ask the user what to do when an interrupt is received. */
6229 interrupt_query (void)
6231 struct remote_state
*rs
= get_remote_state ();
6233 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6235 if (query (_("The target is not responding to interrupt requests.\n"
6236 "Stop debugging it? ")))
6238 remote_unpush_target ();
6239 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6244 if (query (_("Interrupted while waiting for the program.\n"
6245 "Give up waiting? ")))
6250 /* Enable/disable target terminal ownership. Most targets can use
6251 terminal groups to control terminal ownership. Remote targets are
6252 different in that explicit transfer of ownership to/from GDB/target
6256 remote_terminal_inferior (struct target_ops
*self
)
6258 /* NOTE: At this point we could also register our selves as the
6259 recipient of all input. Any characters typed could then be
6260 passed on down to the target. */
6264 remote_terminal_ours (struct target_ops
*self
)
6269 remote_console_output (char *msg
)
6273 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6276 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6280 fputs_unfiltered (tb
, gdb_stdtarg
);
6282 gdb_flush (gdb_stdtarg
);
6285 DEF_VEC_O(cached_reg_t
);
6287 typedef struct stop_reply
6289 struct notif_event base
;
6291 /* The identifier of the thread about this event */
6294 /* The remote state this event is associated with. When the remote
6295 connection, represented by a remote_state object, is closed,
6296 all the associated stop_reply events should be released. */
6297 struct remote_state
*rs
;
6299 struct target_waitstatus ws
;
6301 /* The architecture associated with the expedited registers. */
6304 /* Expedited registers. This makes remote debugging a bit more
6305 efficient for those targets that provide critical registers as
6306 part of their normal status mechanism (as another roundtrip to
6307 fetch them is avoided). */
6308 VEC(cached_reg_t
) *regcache
;
6310 enum target_stop_reason stop_reason
;
6312 CORE_ADDR watch_data_address
;
6317 DECLARE_QUEUE_P (stop_reply_p
);
6318 DEFINE_QUEUE_P (stop_reply_p
);
6319 /* The list of already fetched and acknowledged stop events. This
6320 queue is used for notification Stop, and other notifications
6321 don't need queue for their events, because the notification events
6322 of Stop can't be consumed immediately, so that events should be
6323 queued first, and be consumed by remote_wait_{ns,as} one per
6324 time. Other notifications can consume their events immediately,
6325 so queue is not needed for them. */
6326 static QUEUE (stop_reply_p
) *stop_reply_queue
;
6329 stop_reply_xfree (struct stop_reply
*r
)
6331 notif_event_xfree ((struct notif_event
*) r
);
6334 /* Return the length of the stop reply queue. */
6337 stop_reply_queue_length (void)
6339 return QUEUE_length (stop_reply_p
, stop_reply_queue
);
6343 remote_notif_stop_parse (struct notif_client
*self
, char *buf
,
6344 struct notif_event
*event
)
6346 remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6350 remote_notif_stop_ack (struct notif_client
*self
, char *buf
,
6351 struct notif_event
*event
)
6353 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6356 putpkt (self
->ack_command
);
6358 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6359 /* We got an unknown stop reply. */
6360 error (_("Unknown stop reply"));
6362 push_stop_reply (stop_reply
);
6366 remote_notif_stop_can_get_pending_events (struct notif_client
*self
)
6368 /* We can't get pending events in remote_notif_process for
6369 notification stop, and we have to do this in remote_wait_ns
6370 instead. If we fetch all queued events from stub, remote stub
6371 may exit and we have no chance to process them back in
6373 mark_async_event_handler (remote_async_inferior_event_token
);
6378 stop_reply_dtr (struct notif_event
*event
)
6380 struct stop_reply
*r
= (struct stop_reply
*) event
;
6385 VEC_iterate (cached_reg_t
, r
->regcache
, ix
, reg
);
6389 VEC_free (cached_reg_t
, r
->regcache
);
6392 static struct notif_event
*
6393 remote_notif_stop_alloc_reply (void)
6395 /* We cast to a pointer to the "base class". */
6396 struct notif_event
*r
= (struct notif_event
*) XNEW (struct stop_reply
);
6398 r
->dtr
= stop_reply_dtr
;
6403 /* A client of notification Stop. */
6405 struct notif_client notif_client_stop
=
6409 remote_notif_stop_parse
,
6410 remote_notif_stop_ack
,
6411 remote_notif_stop_can_get_pending_events
,
6412 remote_notif_stop_alloc_reply
,
6416 /* A parameter to pass data in and out. */
6418 struct queue_iter_param
6421 struct stop_reply
*output
;
6424 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6425 the pid of the process that owns the threads we want to check, or
6426 -1 if we want to check all threads. */
6429 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6432 if (ws
->kind
== TARGET_WAITKIND_FORKED
6433 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6435 if (event_pid
== -1 || event_pid
== ptid_get_pid (thread_ptid
))
6442 /* Return the thread's pending status used to determine whether the
6443 thread is a fork parent stopped at a fork event. */
6445 static struct target_waitstatus
*
6446 thread_pending_fork_status (struct thread_info
*thread
)
6448 if (thread
->suspend
.waitstatus_pending_p
)
6449 return &thread
->suspend
.waitstatus
;
6451 return &thread
->pending_follow
;
6454 /* Determine if THREAD is a pending fork parent thread. */
6457 is_pending_fork_parent_thread (struct thread_info
*thread
)
6459 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6462 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
6465 /* Check whether EVENT is a fork event, and if it is, remove the
6466 fork child from the context list passed in DATA. */
6469 remove_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
6470 QUEUE_ITER (stop_reply_p
) *iter
,
6474 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6475 struct threads_listing_context
*context
6476 = (struct threads_listing_context
*) param
->input
;
6478 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6479 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
6480 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
6481 context
->remove_thread (event
->ws
.value
.related_pid
);
6486 /* If CONTEXT contains any fork child threads that have not been
6487 reported yet, remove them from the CONTEXT list. If such a
6488 thread exists it is because we are stopped at a fork catchpoint
6489 and have not yet called follow_fork, which will set up the
6490 host-side data structures for the new process. */
6493 remove_new_fork_children (struct threads_listing_context
*context
)
6495 struct thread_info
* thread
;
6497 struct notif_client
*notif
= ¬if_client_stop
;
6498 struct queue_iter_param param
;
6500 /* For any threads stopped at a fork event, remove the corresponding
6501 fork child threads from the CONTEXT list. */
6502 ALL_NON_EXITED_THREADS (thread
)
6504 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6506 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
6507 context
->remove_thread (ws
->value
.related_pid
);
6510 /* Check for any pending fork events (not reported or processed yet)
6511 in process PID and remove those fork child threads from the
6512 CONTEXT list as well. */
6513 remote_notif_get_pending_events (notif
);
6514 param
.input
= context
;
6515 param
.output
= NULL
;
6516 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6517 remove_child_of_pending_fork
, ¶m
);
6520 /* Check whether EVENT would prevent a global or process wildcard
6524 check_pending_event_prevents_wildcard_vcont_callback
6525 (QUEUE (stop_reply_p
) *q
,
6526 QUEUE_ITER (stop_reply_p
) *iter
,
6530 struct inferior
*inf
;
6531 int *may_global_wildcard_vcont
= (int *) data
;
6533 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
6534 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
6537 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6538 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
6539 *may_global_wildcard_vcont
= 0;
6541 inf
= find_inferior_ptid (event
->ptid
);
6543 /* This may be the first time we heard about this process.
6544 Regardless, we must not do a global wildcard resume, otherwise
6545 we'd resume this process too. */
6546 *may_global_wildcard_vcont
= 0;
6548 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
6553 /* Check whether any event pending in the vStopped queue would prevent
6554 a global or process wildcard vCont action. Clear
6555 *may_global_wildcard if we can't do a global wildcard (vCont;c),
6556 and clear the event inferior's may_wildcard_vcont flag if we can't
6557 do a process-wide wildcard resume (vCont;c:pPID.-1). */
6560 check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard
)
6562 struct notif_client
*notif
= ¬if_client_stop
;
6564 remote_notif_get_pending_events (notif
);
6565 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6566 check_pending_event_prevents_wildcard_vcont_callback
,
6567 may_global_wildcard
);
6570 /* Remove stop replies in the queue if its pid is equal to the given
6574 remove_stop_reply_for_inferior (QUEUE (stop_reply_p
) *q
,
6575 QUEUE_ITER (stop_reply_p
) *iter
,
6579 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6580 struct inferior
*inf
= (struct inferior
*) param
->input
;
6582 if (ptid_get_pid (event
->ptid
) == inf
->pid
)
6584 stop_reply_xfree (event
);
6585 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6591 /* Discard all pending stop replies of inferior INF. */
6594 discard_pending_stop_replies (struct inferior
*inf
)
6596 struct queue_iter_param param
;
6597 struct stop_reply
*reply
;
6598 struct remote_state
*rs
= get_remote_state ();
6599 struct remote_notif_state
*rns
= rs
->notif_state
;
6601 /* This function can be notified when an inferior exists. When the
6602 target is not remote, the notification state is NULL. */
6603 if (rs
->remote_desc
== NULL
)
6606 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
6608 /* Discard the in-flight notification. */
6609 if (reply
!= NULL
&& ptid_get_pid (reply
->ptid
) == inf
->pid
)
6611 stop_reply_xfree (reply
);
6612 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
6616 param
.output
= NULL
;
6617 /* Discard the stop replies we have already pulled with
6619 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6620 remove_stop_reply_for_inferior
, ¶m
);
6623 /* If its remote state is equal to the given remote state,
6624 remove EVENT from the stop reply queue. */
6627 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p
) *q
,
6628 QUEUE_ITER (stop_reply_p
) *iter
,
6632 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6633 struct remote_state
*rs
= (struct remote_state
*) param
->input
;
6635 if (event
->rs
== rs
)
6637 stop_reply_xfree (event
);
6638 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6644 /* Discard the stop replies for RS in stop_reply_queue. */
6647 discard_pending_stop_replies_in_queue (struct remote_state
*rs
)
6649 struct queue_iter_param param
;
6652 param
.output
= NULL
;
6653 /* Discard the stop replies we have already pulled with
6655 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6656 remove_stop_reply_of_remote_state
, ¶m
);
6659 /* A parameter to pass data in and out. */
6662 remote_notif_remove_once_on_match (QUEUE (stop_reply_p
) *q
,
6663 QUEUE_ITER (stop_reply_p
) *iter
,
6667 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6668 ptid_t
*ptid
= (ptid_t
*) param
->input
;
6670 if (ptid_match (event
->ptid
, *ptid
))
6672 param
->output
= event
;
6673 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6680 /* Remove the first reply in 'stop_reply_queue' which matches
6683 static struct stop_reply
*
6684 remote_notif_remove_queued_reply (ptid_t ptid
)
6686 struct queue_iter_param param
;
6688 param
.input
= &ptid
;
6689 param
.output
= NULL
;
6691 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6692 remote_notif_remove_once_on_match
, ¶m
);
6694 fprintf_unfiltered (gdb_stdlog
,
6695 "notif: discard queued event: 'Stop' in %s\n",
6696 target_pid_to_str (ptid
));
6698 return param
.output
;
6701 /* Look for a queued stop reply belonging to PTID. If one is found,
6702 remove it from the queue, and return it. Returns NULL if none is
6703 found. If there are still queued events left to process, tell the
6704 event loop to get back to target_wait soon. */
6706 static struct stop_reply
*
6707 queued_stop_reply (ptid_t ptid
)
6709 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
6711 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
6712 /* There's still at least an event left. */
6713 mark_async_event_handler (remote_async_inferior_event_token
);
6718 /* Push a fully parsed stop reply in the stop reply queue. Since we
6719 know that we now have at least one queued event left to pass to the
6720 core side, tell the event loop to get back to target_wait soon. */
6723 push_stop_reply (struct stop_reply
*new_event
)
6725 QUEUE_enque (stop_reply_p
, stop_reply_queue
, new_event
);
6728 fprintf_unfiltered (gdb_stdlog
,
6729 "notif: push 'Stop' %s to queue %d\n",
6730 target_pid_to_str (new_event
->ptid
),
6731 QUEUE_length (stop_reply_p
,
6734 mark_async_event_handler (remote_async_inferior_event_token
);
6738 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p
) *q
,
6739 QUEUE_ITER (stop_reply_p
) *iter
,
6740 struct stop_reply
*event
,
6743 ptid_t
*ptid
= (ptid_t
*) data
;
6745 return !(ptid_equal (*ptid
, event
->ptid
)
6746 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
);
6749 /* Returns true if we have a stop reply for PTID. */
6752 peek_stop_reply (ptid_t ptid
)
6754 return !QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6755 stop_reply_match_ptid_and_ws
, &ptid
);
6758 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6759 starting with P and ending with PEND matches PREFIX. */
6762 strprefix (const char *p
, const char *pend
, const char *prefix
)
6764 for ( ; p
< pend
; p
++, prefix
++)
6767 return *prefix
== '\0';
6770 /* Parse the stop reply in BUF. Either the function succeeds, and the
6771 result is stored in EVENT, or throws an error. */
6774 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
6776 remote_arch_state
*rsa
= NULL
;
6781 event
->ptid
= null_ptid
;
6782 event
->rs
= get_remote_state ();
6783 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
6784 event
->ws
.value
.integer
= 0;
6785 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6786 event
->regcache
= NULL
;
6791 case 'T': /* Status with PC, SP, FP, ... */
6792 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6793 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6795 n... = register number
6796 r... = register contents
6799 p
= &buf
[3]; /* after Txx */
6805 p1
= strchr (p
, ':');
6807 error (_("Malformed packet(a) (missing colon): %s\n\
6811 error (_("Malformed packet(a) (missing register number): %s\n\
6815 /* Some "registers" are actually extended stop information.
6816 Note if you're adding a new entry here: GDB 7.9 and
6817 earlier assume that all register "numbers" that start
6818 with an hex digit are real register numbers. Make sure
6819 the server only sends such a packet if it knows the
6820 client understands it. */
6822 if (strprefix (p
, p1
, "thread"))
6823 event
->ptid
= read_ptid (++p1
, &p
);
6824 else if (strprefix (p
, p1
, "syscall_entry"))
6828 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
6829 p
= unpack_varlen_hex (++p1
, &sysno
);
6830 event
->ws
.value
.syscall_number
= (int) sysno
;
6832 else if (strprefix (p
, p1
, "syscall_return"))
6836 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
6837 p
= unpack_varlen_hex (++p1
, &sysno
);
6838 event
->ws
.value
.syscall_number
= (int) sysno
;
6840 else if (strprefix (p
, p1
, "watch")
6841 || strprefix (p
, p1
, "rwatch")
6842 || strprefix (p
, p1
, "awatch"))
6844 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
6845 p
= unpack_varlen_hex (++p1
, &addr
);
6846 event
->watch_data_address
= (CORE_ADDR
) addr
;
6848 else if (strprefix (p
, p1
, "swbreak"))
6850 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
6852 /* Make sure the stub doesn't forget to indicate support
6854 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
6855 error (_("Unexpected swbreak stop reason"));
6857 /* The value part is documented as "must be empty",
6858 though we ignore it, in case we ever decide to make
6859 use of it in a backward compatible way. */
6860 p
= strchrnul (p1
+ 1, ';');
6862 else if (strprefix (p
, p1
, "hwbreak"))
6864 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
6866 /* Make sure the stub doesn't forget to indicate support
6868 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
6869 error (_("Unexpected hwbreak stop reason"));
6872 p
= strchrnul (p1
+ 1, ';');
6874 else if (strprefix (p
, p1
, "library"))
6876 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
6877 p
= strchrnul (p1
+ 1, ';');
6879 else if (strprefix (p
, p1
, "replaylog"))
6881 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
6882 /* p1 will indicate "begin" or "end", but it makes
6883 no difference for now, so ignore it. */
6884 p
= strchrnul (p1
+ 1, ';');
6886 else if (strprefix (p
, p1
, "core"))
6890 p
= unpack_varlen_hex (++p1
, &c
);
6893 else if (strprefix (p
, p1
, "fork"))
6895 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6896 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
6898 else if (strprefix (p
, p1
, "vfork"))
6900 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6901 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
6903 else if (strprefix (p
, p1
, "vforkdone"))
6905 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
6906 p
= strchrnul (p1
+ 1, ';');
6908 else if (strprefix (p
, p1
, "exec"))
6911 char pathname
[PATH_MAX
];
6914 /* Determine the length of the execd pathname. */
6915 p
= unpack_varlen_hex (++p1
, &ignored
);
6916 pathlen
= (p
- p1
) / 2;
6918 /* Save the pathname for event reporting and for
6919 the next run command. */
6920 hex2bin (p1
, (gdb_byte
*) pathname
, pathlen
);
6921 pathname
[pathlen
] = '\0';
6923 /* This is freed during event handling. */
6924 event
->ws
.value
.execd_pathname
= xstrdup (pathname
);
6925 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
6927 /* Skip the registers included in this packet, since
6928 they may be for an architecture different from the
6929 one used by the original program. */
6932 else if (strprefix (p
, p1
, "create"))
6934 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
6935 p
= strchrnul (p1
+ 1, ';');
6944 p
= strchrnul (p1
+ 1, ';');
6949 /* Maybe a real ``P'' register number. */
6950 p_temp
= unpack_varlen_hex (p
, &pnum
);
6951 /* If the first invalid character is the colon, we got a
6952 register number. Otherwise, it's an unknown stop
6956 /* If we haven't parsed the event's thread yet, find
6957 it now, in order to find the architecture of the
6958 reported expedited registers. */
6959 if (event
->ptid
== null_ptid
)
6961 const char *thr
= strstr (p1
+ 1, ";thread:");
6963 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
6966 event
->ptid
= magic_null_ptid
;
6971 inferior
*inf
= (event
->ptid
== null_ptid
6973 : find_inferior_ptid (event
->ptid
));
6974 /* If this is the first time we learn anything
6975 about this process, skip the registers
6976 included in this packet, since we don't yet
6977 know which architecture to use to parse them.
6978 We'll determine the architecture later when
6979 we process the stop reply and retrieve the
6980 target description, via
6981 remote_notice_new_inferior ->
6982 post_create_inferior. */
6985 p
= strchrnul (p1
+ 1, ';');
6990 event
->arch
= inf
->gdbarch
;
6991 rsa
= get_remote_arch_state (event
->arch
);
6995 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
6996 cached_reg_t cached_reg
;
6999 error (_("Remote sent bad register number %s: %s\n\
7001 hex_string (pnum
), p
, buf
);
7003 cached_reg
.num
= reg
->regnum
;
7004 cached_reg
.data
= (gdb_byte
*)
7005 xmalloc (register_size (event
->arch
, reg
->regnum
));
7008 fieldsize
= hex2bin (p
, cached_reg
.data
,
7009 register_size (event
->arch
, reg
->regnum
));
7011 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7012 warning (_("Remote reply is too short: %s"), buf
);
7014 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
7018 /* Not a number. Silently skip unknown optional
7020 p
= strchrnul (p1
+ 1, ';');
7025 error (_("Remote register badly formatted: %s\nhere: %s"),
7030 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7034 case 'S': /* Old style status, just signal only. */
7038 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7039 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7040 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7041 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7043 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7046 case 'w': /* Thread exited. */
7051 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7052 p
= unpack_varlen_hex (&buf
[1], &value
);
7053 event
->ws
.value
.integer
= value
;
7055 error (_("stop reply packet badly formatted: %s"), buf
);
7056 event
->ptid
= read_ptid (++p
, NULL
);
7059 case 'W': /* Target exited. */
7066 /* GDB used to accept only 2 hex chars here. Stubs should
7067 only send more if they detect GDB supports multi-process
7069 p
= unpack_varlen_hex (&buf
[1], &value
);
7073 /* The remote process exited. */
7074 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7075 event
->ws
.value
.integer
= value
;
7079 /* The remote process exited with a signal. */
7080 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7081 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7082 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7084 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7087 /* If no process is specified, assume inferior_ptid. */
7088 pid
= ptid_get_pid (inferior_ptid
);
7097 else if (startswith (p
, "process:"))
7101 p
+= sizeof ("process:") - 1;
7102 unpack_varlen_hex (p
, &upid
);
7106 error (_("unknown stop reply packet: %s"), buf
);
7109 error (_("unknown stop reply packet: %s"), buf
);
7110 event
->ptid
= pid_to_ptid (pid
);
7114 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7115 event
->ptid
= minus_one_ptid
;
7119 if (target_is_non_stop_p () && ptid_equal (event
->ptid
, null_ptid
))
7120 error (_("No process or thread specified in stop reply: %s"), buf
);
7123 /* When the stub wants to tell GDB about a new notification reply, it
7124 sends a notification (%Stop, for example). Those can come it at
7125 any time, hence, we have to make sure that any pending
7126 putpkt/getpkt sequence we're making is finished, before querying
7127 the stub for more events with the corresponding ack command
7128 (vStopped, for example). E.g., if we started a vStopped sequence
7129 immediately upon receiving the notification, something like this
7137 1.6) <-- (registers reply to step #1.3)
7139 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7142 To solve this, whenever we parse a %Stop notification successfully,
7143 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7144 doing whatever we were doing:
7150 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7151 2.5) <-- (registers reply to step #2.3)
7153 Eventualy after step #2.5, we return to the event loop, which
7154 notices there's an event on the
7155 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7156 associated callback --- the function below. At this point, we're
7157 always safe to start a vStopped sequence. :
7160 2.7) <-- T05 thread:2
7166 remote_notif_get_pending_events (struct notif_client
*nc
)
7168 struct remote_state
*rs
= get_remote_state ();
7170 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7173 fprintf_unfiltered (gdb_stdlog
,
7174 "notif: process: '%s' ack pending event\n",
7178 nc
->ack (nc
, rs
->buf
, rs
->notif_state
->pending_event
[nc
->id
]);
7179 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7183 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7184 if (strcmp (rs
->buf
, "OK") == 0)
7187 remote_notif_ack (nc
, rs
->buf
);
7193 fprintf_unfiltered (gdb_stdlog
,
7194 "notif: process: '%s' no pending reply\n",
7199 /* Called when it is decided that STOP_REPLY holds the info of the
7200 event that is to be returned to the core. This function always
7201 destroys STOP_REPLY. */
7204 process_stop_reply (struct stop_reply
*stop_reply
,
7205 struct target_waitstatus
*status
)
7209 *status
= stop_reply
->ws
;
7210 ptid
= stop_reply
->ptid
;
7212 /* If no thread/process was reported by the stub, assume the current
7214 if (ptid_equal (ptid
, null_ptid
))
7215 ptid
= inferior_ptid
;
7217 if (status
->kind
!= TARGET_WAITKIND_EXITED
7218 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7219 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7221 struct private_thread_info
*remote_thr
;
7223 /* Expedited registers. */
7224 if (stop_reply
->regcache
)
7226 struct regcache
*regcache
7227 = get_thread_arch_regcache (ptid
, stop_reply
->arch
);
7232 VEC_iterate (cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
7235 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
7239 VEC_free (cached_reg_t
, stop_reply
->regcache
);
7242 remote_notice_new_inferior (ptid
, 0);
7243 remote_thr
= get_private_info_ptid (ptid
);
7244 remote_thr
->core
= stop_reply
->core
;
7245 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7246 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7247 remote_thr
->vcont_resumed
= 0;
7250 stop_reply_xfree (stop_reply
);
7254 /* The non-stop mode version of target_wait. */
7257 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7259 struct remote_state
*rs
= get_remote_state ();
7260 struct stop_reply
*stop_reply
;
7264 /* If in non-stop mode, get out of getpkt even if a
7265 notification is received. */
7267 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7268 0 /* forever */, &is_notif
);
7271 if (ret
!= -1 && !is_notif
)
7274 case 'E': /* Error of some sort. */
7275 /* We're out of sync with the target now. Did it continue
7276 or not? We can't tell which thread it was in non-stop,
7277 so just ignore this. */
7278 warning (_("Remote failure reply: %s"), rs
->buf
);
7280 case 'O': /* Console output. */
7281 remote_console_output (rs
->buf
+ 1);
7284 warning (_("Invalid remote reply: %s"), rs
->buf
);
7288 /* Acknowledge a pending stop reply that may have arrived in the
7290 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7291 remote_notif_get_pending_events (¬if_client_stop
);
7293 /* If indeed we noticed a stop reply, we're done. */
7294 stop_reply
= queued_stop_reply (ptid
);
7295 if (stop_reply
!= NULL
)
7296 return process_stop_reply (stop_reply
, status
);
7298 /* Still no event. If we're just polling for an event, then
7299 return to the event loop. */
7300 if (options
& TARGET_WNOHANG
)
7302 status
->kind
= TARGET_WAITKIND_IGNORE
;
7303 return minus_one_ptid
;
7306 /* Otherwise do a blocking wait. */
7307 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7308 1 /* forever */, &is_notif
);
7312 /* Wait until the remote machine stops, then return, storing status in
7313 STATUS just as `wait' would. */
7316 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7318 struct remote_state
*rs
= get_remote_state ();
7319 ptid_t event_ptid
= null_ptid
;
7321 struct stop_reply
*stop_reply
;
7325 status
->kind
= TARGET_WAITKIND_IGNORE
;
7326 status
->value
.integer
= 0;
7328 stop_reply
= queued_stop_reply (ptid
);
7329 if (stop_reply
!= NULL
)
7330 return process_stop_reply (stop_reply
, status
);
7332 if (rs
->cached_wait_status
)
7333 /* Use the cached wait status, but only once. */
7334 rs
->cached_wait_status
= 0;
7339 int forever
= ((options
& TARGET_WNOHANG
) == 0
7340 && wait_forever_enabled_p
);
7342 if (!rs
->waiting_for_stop_reply
)
7344 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7345 return minus_one_ptid
;
7348 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7349 _never_ wait for ever -> test on target_is_async_p().
7350 However, before we do that we need to ensure that the caller
7351 knows how to take the target into/out of async mode. */
7352 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7353 forever
, &is_notif
);
7355 /* GDB gets a notification. Return to core as this event is
7357 if (ret
!= -1 && is_notif
)
7358 return minus_one_ptid
;
7360 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7361 return minus_one_ptid
;
7366 /* Assume that the target has acknowledged Ctrl-C unless we receive
7367 an 'F' or 'O' packet. */
7368 if (buf
[0] != 'F' && buf
[0] != 'O')
7369 rs
->ctrlc_pending_p
= 0;
7373 case 'E': /* Error of some sort. */
7374 /* We're out of sync with the target now. Did it continue or
7375 not? Not is more likely, so report a stop. */
7376 rs
->waiting_for_stop_reply
= 0;
7378 warning (_("Remote failure reply: %s"), buf
);
7379 status
->kind
= TARGET_WAITKIND_STOPPED
;
7380 status
->value
.sig
= GDB_SIGNAL_0
;
7382 case 'F': /* File-I/O request. */
7383 /* GDB may access the inferior memory while handling the File-I/O
7384 request, but we don't want GDB accessing memory while waiting
7385 for a stop reply. See the comments in putpkt_binary. Set
7386 waiting_for_stop_reply to 0 temporarily. */
7387 rs
->waiting_for_stop_reply
= 0;
7388 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
7389 rs
->ctrlc_pending_p
= 0;
7390 /* GDB handled the File-I/O request, and the target is running
7391 again. Keep waiting for events. */
7392 rs
->waiting_for_stop_reply
= 1;
7394 case 'N': case 'T': case 'S': case 'X': case 'W':
7396 struct stop_reply
*stop_reply
;
7398 /* There is a stop reply to handle. */
7399 rs
->waiting_for_stop_reply
= 0;
7402 = (struct stop_reply
*) remote_notif_parse (¬if_client_stop
,
7405 event_ptid
= process_stop_reply (stop_reply
, status
);
7408 case 'O': /* Console output. */
7409 remote_console_output (buf
+ 1);
7412 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7414 /* Zero length reply means that we tried 'S' or 'C' and the
7415 remote system doesn't support it. */
7416 target_terminal::ours_for_output ();
7418 ("Can't send signals to this remote system. %s not sent.\n",
7419 gdb_signal_to_name (rs
->last_sent_signal
));
7420 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7421 target_terminal::inferior ();
7423 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7427 /* else fallthrough */
7429 warning (_("Invalid remote reply: %s"), buf
);
7433 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7434 return minus_one_ptid
;
7435 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7437 /* Nothing interesting happened. If we're doing a non-blocking
7438 poll, we're done. Otherwise, go back to waiting. */
7439 if (options
& TARGET_WNOHANG
)
7440 return minus_one_ptid
;
7444 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7445 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7447 if (!ptid_equal (event_ptid
, null_ptid
))
7448 record_currthread (rs
, event_ptid
);
7450 event_ptid
= inferior_ptid
;
7453 /* A process exit. Invalidate our notion of current thread. */
7454 record_currthread (rs
, minus_one_ptid
);
7459 /* Wait until the remote machine stops, then return, storing status in
7460 STATUS just as `wait' would. */
7463 remote_wait (struct target_ops
*ops
,
7464 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7468 if (target_is_non_stop_p ())
7469 event_ptid
= remote_wait_ns (ptid
, status
, options
);
7471 event_ptid
= remote_wait_as (ptid
, status
, options
);
7473 if (target_is_async_p ())
7475 /* If there are are events left in the queue tell the event loop
7477 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
7478 mark_async_event_handler (remote_async_inferior_event_token
);
7484 /* Fetch a single register using a 'p' packet. */
7487 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
7489 struct gdbarch
*gdbarch
= regcache
->arch ();
7490 struct remote_state
*rs
= get_remote_state ();
7492 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7495 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
7498 if (reg
->pnum
== -1)
7503 p
+= hexnumstr (p
, reg
->pnum
);
7506 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7510 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
7514 case PACKET_UNKNOWN
:
7517 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7518 gdbarch_register_name (regcache
->arch (),
7523 /* If this register is unfetchable, tell the regcache. */
7526 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7530 /* Otherwise, parse and supply the value. */
7536 error (_("fetch_register_using_p: early buf termination"));
7538 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7541 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
7545 /* Fetch the registers included in the target's 'g' packet. */
7548 send_g_packet (void)
7550 struct remote_state
*rs
= get_remote_state ();
7553 xsnprintf (rs
->buf
, get_remote_packet_size (), "g");
7554 remote_send (&rs
->buf
, &rs
->buf_size
);
7556 /* We can get out of synch in various cases. If the first character
7557 in the buffer is not a hex character, assume that has happened
7558 and try to fetch another packet to read. */
7559 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
7560 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
7561 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
7562 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
7565 fprintf_unfiltered (gdb_stdlog
,
7566 "Bad register packet; fetching a new packet\n");
7567 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7570 buf_len
= strlen (rs
->buf
);
7572 /* Sanity check the received packet. */
7573 if (buf_len
% 2 != 0)
7574 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
7580 process_g_packet (struct regcache
*regcache
)
7582 struct gdbarch
*gdbarch
= regcache
->arch ();
7583 struct remote_state
*rs
= get_remote_state ();
7584 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7589 buf_len
= strlen (rs
->buf
);
7591 /* Further sanity checks, with knowledge of the architecture. */
7592 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
7593 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
7594 "bytes): %s"), rsa
->sizeof_g_packet
, buf_len
/ 2, rs
->buf
);
7596 /* Save the size of the packet sent to us by the target. It is used
7597 as a heuristic when determining the max size of packets that the
7598 target can safely receive. */
7599 if (rsa
->actual_register_packet_size
== 0)
7600 rsa
->actual_register_packet_size
= buf_len
;
7602 /* If this is smaller than we guessed the 'g' packet would be,
7603 update our records. A 'g' reply that doesn't include a register's
7604 value implies either that the register is not available, or that
7605 the 'p' packet must be used. */
7606 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
7608 long sizeof_g_packet
= buf_len
/ 2;
7610 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7612 long offset
= rsa
->regs
[i
].offset
;
7613 long reg_size
= register_size (gdbarch
, i
);
7615 if (rsa
->regs
[i
].pnum
== -1)
7618 if (offset
>= sizeof_g_packet
)
7619 rsa
->regs
[i
].in_g_packet
= 0;
7620 else if (offset
+ reg_size
> sizeof_g_packet
)
7621 error (_("Truncated register %d in remote 'g' packet"), i
);
7623 rsa
->regs
[i
].in_g_packet
= 1;
7626 /* Looks valid enough, we can assume this is the correct length
7627 for a 'g' packet. It's important not to adjust
7628 rsa->sizeof_g_packet if we have truncated registers otherwise
7629 this "if" won't be run the next time the method is called
7630 with a packet of the same size and one of the internal errors
7631 below will trigger instead. */
7632 rsa
->sizeof_g_packet
= sizeof_g_packet
;
7635 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
7637 /* Unimplemented registers read as all bits zero. */
7638 memset (regs
, 0, rsa
->sizeof_g_packet
);
7640 /* Reply describes registers byte by byte, each byte encoded as two
7641 hex characters. Suck them all up, then supply them to the
7642 register cacheing/storage mechanism. */
7645 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
7647 if (p
[0] == 0 || p
[1] == 0)
7648 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7649 internal_error (__FILE__
, __LINE__
,
7650 _("unexpected end of 'g' packet reply"));
7652 if (p
[0] == 'x' && p
[1] == 'x')
7653 regs
[i
] = 0; /* 'x' */
7655 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7659 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7661 struct packet_reg
*r
= &rsa
->regs
[i
];
7662 long reg_size
= register_size (gdbarch
, i
);
7666 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
))
7667 /* This shouldn't happen - we adjusted in_g_packet above. */
7668 internal_error (__FILE__
, __LINE__
,
7669 _("unexpected end of 'g' packet reply"));
7670 else if (rs
->buf
[r
->offset
* 2] == 'x')
7672 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
7673 /* The register isn't available, mark it as such (at
7674 the same time setting the value to zero). */
7675 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
7678 regcache_raw_supply (regcache
, r
->regnum
,
7685 fetch_registers_using_g (struct regcache
*regcache
)
7688 process_g_packet (regcache
);
7691 /* Make the remote selected traceframe match GDB's selected
7695 set_remote_traceframe (void)
7698 struct remote_state
*rs
= get_remote_state ();
7700 if (rs
->remote_traceframe_number
== get_traceframe_number ())
7703 /* Avoid recursion, remote_trace_find calls us again. */
7704 rs
->remote_traceframe_number
= get_traceframe_number ();
7706 newnum
= target_trace_find (tfind_number
,
7707 get_traceframe_number (), 0, 0, NULL
);
7709 /* Should not happen. If it does, all bets are off. */
7710 if (newnum
!= get_traceframe_number ())
7711 warning (_("could not set remote traceframe"));
7715 remote_fetch_registers (struct target_ops
*ops
,
7716 struct regcache
*regcache
, int regnum
)
7718 struct gdbarch
*gdbarch
= regcache
->arch ();
7719 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7722 set_remote_traceframe ();
7723 set_general_thread (regcache_get_ptid (regcache
));
7727 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7729 gdb_assert (reg
!= NULL
);
7731 /* If this register might be in the 'g' packet, try that first -
7732 we are likely to read more than one register. If this is the
7733 first 'g' packet, we might be overly optimistic about its
7734 contents, so fall back to 'p'. */
7735 if (reg
->in_g_packet
)
7737 fetch_registers_using_g (regcache
);
7738 if (reg
->in_g_packet
)
7742 if (fetch_register_using_p (regcache
, reg
))
7745 /* This register is not available. */
7746 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7751 fetch_registers_using_g (regcache
);
7753 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7754 if (!rsa
->regs
[i
].in_g_packet
)
7755 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
7757 /* This register is not available. */
7758 regcache_raw_supply (regcache
, i
, NULL
);
7762 /* Prepare to store registers. Since we may send them all (using a
7763 'G' request), we have to read out the ones we don't want to change
7767 remote_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
7769 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7772 /* Make sure the entire registers array is valid. */
7773 switch (packet_support (PACKET_P
))
7775 case PACKET_DISABLE
:
7776 case PACKET_SUPPORT_UNKNOWN
:
7777 /* Make sure all the necessary registers are cached. */
7778 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7779 if (rsa
->regs
[i
].in_g_packet
)
7780 regcache_raw_update (regcache
, rsa
->regs
[i
].regnum
);
7787 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7788 packet was not recognized. */
7791 store_register_using_P (const struct regcache
*regcache
,
7792 struct packet_reg
*reg
)
7794 struct gdbarch
*gdbarch
= regcache
->arch ();
7795 struct remote_state
*rs
= get_remote_state ();
7796 /* Try storing a single register. */
7797 char *buf
= rs
->buf
;
7798 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7801 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
7804 if (reg
->pnum
== -1)
7807 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
7808 p
= buf
+ strlen (buf
);
7809 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
7810 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
7812 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7814 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
7819 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7820 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
7821 case PACKET_UNKNOWN
:
7824 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
7828 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7829 contents of the register cache buffer. FIXME: ignores errors. */
7832 store_registers_using_G (const struct regcache
*regcache
)
7834 struct remote_state
*rs
= get_remote_state ();
7835 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7839 /* Extract all the registers in the regcache copying them into a
7844 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
7845 memset (regs
, 0, rsa
->sizeof_g_packet
);
7846 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7848 struct packet_reg
*r
= &rsa
->regs
[i
];
7851 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
7855 /* Command describes registers byte by byte,
7856 each byte encoded as two hex characters. */
7859 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
7861 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7862 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7863 error (_("Could not write registers; remote failure reply '%s'"),
7867 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7868 of the register cache buffer. FIXME: ignores errors. */
7871 remote_store_registers (struct target_ops
*ops
,
7872 struct regcache
*regcache
, int regnum
)
7874 struct gdbarch
*gdbarch
= regcache
->arch ();
7875 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7878 set_remote_traceframe ();
7879 set_general_thread (regcache_get_ptid (regcache
));
7883 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7885 gdb_assert (reg
!= NULL
);
7887 /* Always prefer to store registers using the 'P' packet if
7888 possible; we often change only a small number of registers.
7889 Sometimes we change a larger number; we'd need help from a
7890 higher layer to know to use 'G'. */
7891 if (store_register_using_P (regcache
, reg
))
7894 /* For now, don't complain if we have no way to write the
7895 register. GDB loses track of unavailable registers too
7896 easily. Some day, this may be an error. We don't have
7897 any way to read the register, either... */
7898 if (!reg
->in_g_packet
)
7901 store_registers_using_G (regcache
);
7905 store_registers_using_G (regcache
);
7907 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7908 if (!rsa
->regs
[i
].in_g_packet
)
7909 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
7910 /* See above for why we do not issue an error here. */
7915 /* Return the number of hex digits in num. */
7918 hexnumlen (ULONGEST num
)
7922 for (i
= 0; num
!= 0; i
++)
7925 return std::max (i
, 1);
7928 /* Set BUF to the minimum number of hex digits representing NUM. */
7931 hexnumstr (char *buf
, ULONGEST num
)
7933 int len
= hexnumlen (num
);
7935 return hexnumnstr (buf
, num
, len
);
7939 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7942 hexnumnstr (char *buf
, ULONGEST num
, int width
)
7948 for (i
= width
- 1; i
>= 0; i
--)
7950 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
7957 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7960 remote_address_masked (CORE_ADDR addr
)
7962 unsigned int address_size
= remote_address_size
;
7964 /* If "remoteaddresssize" was not set, default to target address size. */
7966 address_size
= gdbarch_addr_bit (target_gdbarch ());
7968 if (address_size
> 0
7969 && address_size
< (sizeof (ULONGEST
) * 8))
7971 /* Only create a mask when that mask can safely be constructed
7972 in a ULONGEST variable. */
7975 mask
= (mask
<< address_size
) - 1;
7981 /* Determine whether the remote target supports binary downloading.
7982 This is accomplished by sending a no-op memory write of zero length
7983 to the target at the specified address. It does not suffice to send
7984 the whole packet, since many stubs strip the eighth bit and
7985 subsequently compute a wrong checksum, which causes real havoc with
7988 NOTE: This can still lose if the serial line is not eight-bit
7989 clean. In cases like this, the user should clear "remote
7993 check_binary_download (CORE_ADDR addr
)
7995 struct remote_state
*rs
= get_remote_state ();
7997 switch (packet_support (PACKET_X
))
7999 case PACKET_DISABLE
:
8003 case PACKET_SUPPORT_UNKNOWN
:
8009 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8011 p
+= hexnumstr (p
, (ULONGEST
) 0);
8015 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8016 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8018 if (rs
->buf
[0] == '\0')
8021 fprintf_unfiltered (gdb_stdlog
,
8022 "binary downloading NOT "
8023 "supported by target\n");
8024 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8029 fprintf_unfiltered (gdb_stdlog
,
8030 "binary downloading supported by target\n");
8031 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8038 /* Helper function to resize the payload in order to try to get a good
8039 alignment. We try to write an amount of data such that the next write will
8040 start on an address aligned on REMOTE_ALIGN_WRITES. */
8043 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8045 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8048 /* Write memory data directly to the remote machine.
8049 This does not inform the data cache; the data cache uses this.
8050 HEADER is the starting part of the packet.
8051 MEMADDR is the address in the remote memory space.
8052 MYADDR is the address of the buffer in our space.
8053 LEN_UNITS is the number of addressable units to write.
8054 UNIT_SIZE is the length in bytes of an addressable unit.
8055 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8056 should send data as binary ('X'), or hex-encoded ('M').
8058 The function creates packet of the form
8059 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8061 where encoding of <DATA> is terminated by PACKET_FORMAT.
8063 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8066 Return the transferred status, error or OK (an
8067 'enum target_xfer_status' value). Save the number of addressable units
8068 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8070 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8071 exchange between gdb and the stub could look like (?? in place of the
8077 -> $M1000,3:eeeeffffeeee#??
8081 <- eeeeffffeeeedddd */
8083 static enum target_xfer_status
8084 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8085 const gdb_byte
*myaddr
, ULONGEST len_units
,
8086 int unit_size
, ULONGEST
*xfered_len_units
,
8087 char packet_format
, int use_length
)
8089 struct remote_state
*rs
= get_remote_state ();
8095 int payload_capacity_bytes
;
8096 int payload_length_bytes
;
8098 if (packet_format
!= 'X' && packet_format
!= 'M')
8099 internal_error (__FILE__
, __LINE__
,
8100 _("remote_write_bytes_aux: bad packet format"));
8103 return TARGET_XFER_EOF
;
8105 payload_capacity_bytes
= get_memory_write_packet_size ();
8107 /* The packet buffer will be large enough for the payload;
8108 get_memory_packet_size ensures this. */
8111 /* Compute the size of the actual payload by subtracting out the
8112 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8114 payload_capacity_bytes
-= strlen ("$,:#NN");
8116 /* The comma won't be used. */
8117 payload_capacity_bytes
+= 1;
8118 payload_capacity_bytes
-= strlen (header
);
8119 payload_capacity_bytes
-= hexnumlen (memaddr
);
8121 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8123 strcat (rs
->buf
, header
);
8124 p
= rs
->buf
+ strlen (header
);
8126 /* Compute a best guess of the number of bytes actually transfered. */
8127 if (packet_format
== 'X')
8129 /* Best guess at number of bytes that will fit. */
8130 todo_units
= std::min (len_units
,
8131 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8133 payload_capacity_bytes
-= hexnumlen (todo_units
);
8134 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8138 /* Number of bytes that will fit. */
8140 = std::min (len_units
,
8141 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8143 payload_capacity_bytes
-= hexnumlen (todo_units
);
8144 todo_units
= std::min (todo_units
,
8145 (payload_capacity_bytes
/ unit_size
) / 2);
8148 if (todo_units
<= 0)
8149 internal_error (__FILE__
, __LINE__
,
8150 _("minimum packet size too small to write data"));
8152 /* If we already need another packet, then try to align the end
8153 of this packet to a useful boundary. */
8154 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8155 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8157 /* Append "<memaddr>". */
8158 memaddr
= remote_address_masked (memaddr
);
8159 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8166 /* Append the length and retain its location and size. It may need to be
8167 adjusted once the packet body has been created. */
8169 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8177 /* Append the packet body. */
8178 if (packet_format
== 'X')
8180 /* Binary mode. Send target system values byte by byte, in
8181 increasing byte addresses. Only escape certain critical
8183 payload_length_bytes
=
8184 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8185 &units_written
, payload_capacity_bytes
);
8187 /* If not all TODO units fit, then we'll need another packet. Make
8188 a second try to keep the end of the packet aligned. Don't do
8189 this if the packet is tiny. */
8190 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8194 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8196 if (new_todo_units
!= units_written
)
8197 payload_length_bytes
=
8198 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8199 (gdb_byte
*) p
, &units_written
,
8200 payload_capacity_bytes
);
8203 p
+= payload_length_bytes
;
8204 if (use_length
&& units_written
< todo_units
)
8206 /* Escape chars have filled up the buffer prematurely,
8207 and we have actually sent fewer units than planned.
8208 Fix-up the length field of the packet. Use the same
8209 number of characters as before. */
8210 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8212 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8217 /* Normal mode: Send target system values byte by byte, in
8218 increasing byte addresses. Each byte is encoded as a two hex
8220 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8221 units_written
= todo_units
;
8224 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8225 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8227 if (rs
->buf
[0] == 'E')
8228 return TARGET_XFER_E_IO
;
8230 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8231 send fewer units than we'd planned. */
8232 *xfered_len_units
= (ULONGEST
) units_written
;
8233 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8236 /* Write memory data directly to the remote machine.
8237 This does not inform the data cache; the data cache uses this.
8238 MEMADDR is the address in the remote memory space.
8239 MYADDR is the address of the buffer in our space.
8240 LEN is the number of bytes.
8242 Return the transferred status, error or OK (an
8243 'enum target_xfer_status' value). Save the number of bytes
8244 transferred in *XFERED_LEN. Only transfer a single packet. */
8246 static enum target_xfer_status
8247 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ULONGEST len
,
8248 int unit_size
, ULONGEST
*xfered_len
)
8250 const char *packet_format
= NULL
;
8252 /* Check whether the target supports binary download. */
8253 check_binary_download (memaddr
);
8255 switch (packet_support (PACKET_X
))
8258 packet_format
= "X";
8260 case PACKET_DISABLE
:
8261 packet_format
= "M";
8263 case PACKET_SUPPORT_UNKNOWN
:
8264 internal_error (__FILE__
, __LINE__
,
8265 _("remote_write_bytes: bad internal state"));
8267 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8270 return remote_write_bytes_aux (packet_format
,
8271 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8272 packet_format
[0], 1);
8275 /* Read memory data directly from the remote machine.
8276 This does not use the data cache; the data cache uses this.
8277 MEMADDR is the address in the remote memory space.
8278 MYADDR is the address of the buffer in our space.
8279 LEN_UNITS is the number of addressable memory units to read..
8280 UNIT_SIZE is the length in bytes of an addressable unit.
8282 Return the transferred status, error or OK (an
8283 'enum target_xfer_status' value). Save the number of bytes
8284 transferred in *XFERED_LEN_UNITS.
8286 See the comment of remote_write_bytes_aux for an example of
8287 memory read/write exchange between gdb and the stub. */
8289 static enum target_xfer_status
8290 remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ULONGEST len_units
,
8291 int unit_size
, ULONGEST
*xfered_len_units
)
8293 struct remote_state
*rs
= get_remote_state ();
8294 int buf_size_bytes
; /* Max size of packet output buffer. */
8299 buf_size_bytes
= get_memory_read_packet_size ();
8300 /* The packet buffer will be large enough for the payload;
8301 get_memory_packet_size ensures this. */
8303 /* Number of units that will fit. */
8304 todo_units
= std::min (len_units
,
8305 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8307 /* Construct "m"<memaddr>","<len>". */
8308 memaddr
= remote_address_masked (memaddr
);
8311 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8313 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8316 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8317 if (rs
->buf
[0] == 'E'
8318 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8319 && rs
->buf
[3] == '\0')
8320 return TARGET_XFER_E_IO
;
8321 /* Reply describes memory byte by byte, each byte encoded as two hex
8324 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8325 /* Return what we have. Let higher layers handle partial reads. */
8326 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8327 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8330 /* Using the set of read-only target sections of remote, read live
8333 For interface/parameters/return description see target.h,
8336 static enum target_xfer_status
8337 remote_xfer_live_readonly_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
8338 ULONGEST memaddr
, ULONGEST len
,
8339 int unit_size
, ULONGEST
*xfered_len
)
8341 struct target_section
*secp
;
8342 struct target_section_table
*table
;
8344 secp
= target_section_by_addr (ops
, memaddr
);
8346 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
8347 secp
->the_bfd_section
)
8350 struct target_section
*p
;
8351 ULONGEST memend
= memaddr
+ len
;
8353 table
= target_get_section_table (ops
);
8355 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8357 if (memaddr
>= p
->addr
)
8359 if (memend
<= p
->endaddr
)
8361 /* Entire transfer is within this section. */
8362 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8365 else if (memaddr
>= p
->endaddr
)
8367 /* This section ends before the transfer starts. */
8372 /* This section overlaps the transfer. Just do half. */
8373 len
= p
->endaddr
- memaddr
;
8374 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8381 return TARGET_XFER_EOF
;
8384 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8385 first if the requested memory is unavailable in traceframe.
8386 Otherwise, fall back to remote_read_bytes_1. */
8388 static enum target_xfer_status
8389 remote_read_bytes (struct target_ops
*ops
, CORE_ADDR memaddr
,
8390 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8391 ULONGEST
*xfered_len
)
8394 return TARGET_XFER_EOF
;
8396 if (get_traceframe_number () != -1)
8398 std::vector
<mem_range
> available
;
8400 /* If we fail to get the set of available memory, then the
8401 target does not support querying traceframe info, and so we
8402 attempt reading from the traceframe anyway (assuming the
8403 target implements the old QTro packet then). */
8404 if (traceframe_available_memory (&available
, memaddr
, len
))
8406 if (available
.empty () || available
[0].start
!= memaddr
)
8408 enum target_xfer_status res
;
8410 /* Don't read into the traceframe's available
8412 if (!available
.empty ())
8414 LONGEST oldlen
= len
;
8416 len
= available
[0].start
- memaddr
;
8417 gdb_assert (len
<= oldlen
);
8420 /* This goes through the topmost target again. */
8421 res
= remote_xfer_live_readonly_partial (ops
, myaddr
, memaddr
,
8422 len
, unit_size
, xfered_len
);
8423 if (res
== TARGET_XFER_OK
)
8424 return TARGET_XFER_OK
;
8427 /* No use trying further, we know some memory starting
8428 at MEMADDR isn't available. */
8430 return (*xfered_len
!= 0) ?
8431 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8435 /* Don't try to read more than how much is available, in
8436 case the target implements the deprecated QTro packet to
8437 cater for older GDBs (the target's knowledge of read-only
8438 sections may be outdated by now). */
8439 len
= available
[0].length
;
8443 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8448 /* Sends a packet with content determined by the printf format string
8449 FORMAT and the remaining arguments, then gets the reply. Returns
8450 whether the packet was a success, a failure, or unknown. */
8452 static enum packet_result
remote_send_printf (const char *format
, ...)
8453 ATTRIBUTE_PRINTF (1, 2);
8455 static enum packet_result
8456 remote_send_printf (const char *format
, ...)
8458 struct remote_state
*rs
= get_remote_state ();
8459 int max_size
= get_remote_packet_size ();
8462 va_start (ap
, format
);
8465 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
8466 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8468 if (putpkt (rs
->buf
) < 0)
8469 error (_("Communication problem with target."));
8472 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8474 return packet_check_result (rs
->buf
);
8477 /* Flash writing can take quite some time. We'll set
8478 effectively infinite timeout for flash operations.
8479 In future, we'll need to decide on a better approach. */
8480 static const int remote_flash_timeout
= 1000;
8483 remote_flash_erase (struct target_ops
*ops
,
8484 ULONGEST address
, LONGEST length
)
8486 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
8487 enum packet_result ret
;
8488 scoped_restore restore_timeout
8489 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8491 ret
= remote_send_printf ("vFlashErase:%s,%s",
8492 phex (address
, addr_size
),
8496 case PACKET_UNKNOWN
:
8497 error (_("Remote target does not support flash erase"));
8499 error (_("Error erasing flash with vFlashErase packet"));
8505 static enum target_xfer_status
8506 remote_flash_write (struct target_ops
*ops
, ULONGEST address
,
8507 ULONGEST length
, ULONGEST
*xfered_len
,
8508 const gdb_byte
*data
)
8510 scoped_restore restore_timeout
8511 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8512 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
8517 remote_flash_done (struct target_ops
*ops
)
8521 scoped_restore restore_timeout
8522 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8524 ret
= remote_send_printf ("vFlashDone");
8528 case PACKET_UNKNOWN
:
8529 error (_("Remote target does not support vFlashDone"));
8531 error (_("Error finishing flash operation"));
8538 remote_files_info (struct target_ops
*ignore
)
8540 puts_filtered ("Debugging a target over a serial line.\n");
8543 /* Stuff for dealing with the packets which are part of this protocol.
8544 See comment at top of file for details. */
8546 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8547 error to higher layers. Called when a serial error is detected.
8548 The exception message is STRING, followed by a colon and a blank,
8549 the system error message for errno at function entry and final dot
8550 for output compatibility with throw_perror_with_name. */
8553 unpush_and_perror (const char *string
)
8555 int saved_errno
= errno
;
8557 remote_unpush_target ();
8558 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
8559 safe_strerror (saved_errno
));
8562 /* Read a single character from the remote end. The current quit
8563 handler is overridden to avoid quitting in the middle of packet
8564 sequence, as that would break communication with the remote server.
8565 See remote_serial_quit_handler for more detail. */
8568 readchar (int timeout
)
8571 struct remote_state
*rs
= get_remote_state ();
8574 scoped_restore restore_quit
8575 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8577 rs
->got_ctrlc_during_io
= 0;
8579 ch
= serial_readchar (rs
->remote_desc
, timeout
);
8581 if (rs
->got_ctrlc_during_io
)
8588 switch ((enum serial_rc
) ch
)
8591 remote_unpush_target ();
8592 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
8595 unpush_and_perror (_("Remote communication error. "
8596 "Target disconnected."));
8598 case SERIAL_TIMEOUT
:
8604 /* Wrapper for serial_write that closes the target and throws if
8605 writing fails. The current quit handler is overridden to avoid
8606 quitting in the middle of packet sequence, as that would break
8607 communication with the remote server. See
8608 remote_serial_quit_handler for more detail. */
8611 remote_serial_write (const char *str
, int len
)
8613 struct remote_state
*rs
= get_remote_state ();
8615 scoped_restore restore_quit
8616 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8618 rs
->got_ctrlc_during_io
= 0;
8620 if (serial_write (rs
->remote_desc
, str
, len
))
8622 unpush_and_perror (_("Remote communication error. "
8623 "Target disconnected."));
8626 if (rs
->got_ctrlc_during_io
)
8630 /* Send the command in *BUF to the remote machine, and read the reply
8631 into *BUF. Report an error if we get an error reply. Resize
8632 *BUF using xrealloc if necessary to hold the result, and update
8636 remote_send (char **buf
,
8640 getpkt (buf
, sizeof_buf
, 0);
8642 if ((*buf
)[0] == 'E')
8643 error (_("Remote failure reply: %s"), *buf
);
8646 /* Return a string representing an escaped version of BUF, of len N.
8647 E.g. \n is converted to \\n, \t to \\t, etc. */
8650 escape_buffer (const char *buf
, int n
)
8654 stb
.putstrn (buf
, n
, '\\');
8655 return std::move (stb
.string ());
8658 /* Display a null-terminated packet on stdout, for debugging, using C
8662 print_packet (const char *buf
)
8664 puts_filtered ("\"");
8665 fputstr_filtered (buf
, '"', gdb_stdout
);
8666 puts_filtered ("\"");
8670 putpkt (const char *buf
)
8672 return putpkt_binary (buf
, strlen (buf
));
8675 /* Send a packet to the remote machine, with error checking. The data
8676 of the packet is in BUF. The string in BUF can be at most
8677 get_remote_packet_size () - 5 to account for the $, # and checksum,
8678 and for a possible /0 if we are debugging (remote_debug) and want
8679 to print the sent packet as a string. */
8682 putpkt_binary (const char *buf
, int cnt
)
8684 struct remote_state
*rs
= get_remote_state ();
8686 unsigned char csum
= 0;
8687 gdb::def_vector
<char> data (cnt
+ 6);
8688 char *buf2
= data
.data ();
8694 /* Catch cases like trying to read memory or listing threads while
8695 we're waiting for a stop reply. The remote server wouldn't be
8696 ready to handle this request, so we'd hang and timeout. We don't
8697 have to worry about this in synchronous mode, because in that
8698 case it's not possible to issue a command while the target is
8699 running. This is not a problem in non-stop mode, because in that
8700 case, the stub is always ready to process serial input. */
8701 if (!target_is_non_stop_p ()
8702 && target_is_async_p ()
8703 && rs
->waiting_for_stop_reply
)
8705 error (_("Cannot execute this command while the target is running.\n"
8706 "Use the \"interrupt\" command to stop the target\n"
8707 "and then try again."));
8710 /* We're sending out a new packet. Make sure we don't look at a
8711 stale cached response. */
8712 rs
->cached_wait_status
= 0;
8714 /* Copy the packet into buffer BUF2, encapsulating it
8715 and giving it a checksum. */
8720 for (i
= 0; i
< cnt
; i
++)
8726 *p
++ = tohex ((csum
>> 4) & 0xf);
8727 *p
++ = tohex (csum
& 0xf);
8729 /* Send it over and over until we get a positive ack. */
8733 int started_error_output
= 0;
8739 int len
= (int) (p
- buf2
);
8742 = escape_buffer (buf2
, std::min (len
, REMOTE_DEBUG_MAX_CHAR
));
8744 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
8746 if (str
.length () > REMOTE_DEBUG_MAX_CHAR
)
8748 fprintf_unfiltered (gdb_stdlog
, "[%zu bytes omitted]",
8749 str
.length () - REMOTE_DEBUG_MAX_CHAR
);
8752 fprintf_unfiltered (gdb_stdlog
, "...");
8754 gdb_flush (gdb_stdlog
);
8756 remote_serial_write (buf2
, p
- buf2
);
8758 /* If this is a no acks version of the remote protocol, send the
8759 packet and move on. */
8763 /* Read until either a timeout occurs (-2) or '+' is read.
8764 Handle any notification that arrives in the mean time. */
8767 ch
= readchar (remote_timeout
);
8775 case SERIAL_TIMEOUT
:
8778 if (started_error_output
)
8780 putchar_unfiltered ('\n');
8781 started_error_output
= 0;
8790 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
8794 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
8796 case SERIAL_TIMEOUT
:
8800 break; /* Retransmit buffer. */
8804 fprintf_unfiltered (gdb_stdlog
,
8805 "Packet instead of Ack, ignoring it\n");
8806 /* It's probably an old response sent because an ACK
8807 was lost. Gobble up the packet and ack it so it
8808 doesn't get retransmitted when we resend this
8811 remote_serial_write ("+", 1);
8812 continue; /* Now, go look for +. */
8819 /* If we got a notification, handle it, and go back to looking
8821 /* We've found the start of a notification. Now
8822 collect the data. */
8823 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
8828 std::string str
= escape_buffer (rs
->buf
, val
);
8830 fprintf_unfiltered (gdb_stdlog
,
8831 " Notification received: %s\n",
8834 handle_notification (rs
->notif_state
, rs
->buf
);
8835 /* We're in sync now, rewait for the ack. */
8842 if (!started_error_output
)
8844 started_error_output
= 1;
8845 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8847 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8848 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
8857 if (!started_error_output
)
8859 started_error_output
= 1;
8860 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8862 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8866 break; /* Here to retransmit. */
8870 /* This is wrong. If doing a long backtrace, the user should be
8871 able to get out next time we call QUIT, without anything as
8872 violent as interrupt_query. If we want to provide a way out of
8873 here without getting to the next QUIT, it should be based on
8874 hitting ^C twice as in remote_wait. */
8886 /* Come here after finding the start of a frame when we expected an
8887 ack. Do our best to discard the rest of this packet. */
8896 c
= readchar (remote_timeout
);
8899 case SERIAL_TIMEOUT
:
8900 /* Nothing we can do. */
8903 /* Discard the two bytes of checksum and stop. */
8904 c
= readchar (remote_timeout
);
8906 c
= readchar (remote_timeout
);
8909 case '*': /* Run length encoding. */
8910 /* Discard the repeat count. */
8911 c
= readchar (remote_timeout
);
8916 /* A regular character. */
8922 /* Come here after finding the start of the frame. Collect the rest
8923 into *BUF, verifying the checksum, length, and handling run-length
8924 compression. NUL terminate the buffer. If there is not enough room,
8925 expand *BUF using xrealloc.
8927 Returns -1 on error, number of characters in buffer (ignoring the
8928 trailing NULL) on success. (could be extended to return one of the
8929 SERIAL status indications). */
8932 read_frame (char **buf_p
,
8939 struct remote_state
*rs
= get_remote_state ();
8946 c
= readchar (remote_timeout
);
8949 case SERIAL_TIMEOUT
:
8951 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
8955 fputs_filtered ("Saw new packet start in middle of old one\n",
8957 return -1; /* Start a new packet, count retries. */
8960 unsigned char pktcsum
;
8966 check_0
= readchar (remote_timeout
);
8968 check_1
= readchar (remote_timeout
);
8970 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
8973 fputs_filtered ("Timeout in checksum, retrying\n",
8977 else if (check_0
< 0 || check_1
< 0)
8980 fputs_filtered ("Communication error in checksum\n",
8985 /* Don't recompute the checksum; with no ack packets we
8986 don't have any way to indicate a packet retransmission
8991 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
8992 if (csum
== pktcsum
)
8997 std::string str
= escape_buffer (buf
, bc
);
8999 fprintf_unfiltered (gdb_stdlog
,
9000 "Bad checksum, sentsum=0x%x, "
9001 "csum=0x%x, buf=%s\n",
9002 pktcsum
, csum
, str
.c_str ());
9004 /* Number of characters in buffer ignoring trailing
9008 case '*': /* Run length encoding. */
9013 c
= readchar (remote_timeout
);
9015 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9017 /* The character before ``*'' is repeated. */
9019 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9021 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
9023 /* Make some more room in the buffer. */
9024 *sizeof_buf
+= repeat
;
9025 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9029 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9035 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9039 if (bc
>= *sizeof_buf
- 1)
9041 /* Make some more room in the buffer. */
9043 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9054 /* Read a packet from the remote machine, with error checking, and
9055 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9056 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9057 rather than timing out; this is used (in synchronous mode) to wait
9058 for a target that is is executing user code to stop. */
9059 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9060 don't have to change all the calls to getpkt to deal with the
9061 return value, because at the moment I don't know what the right
9062 thing to do it for those. */
9068 getpkt_sane (buf
, sizeof_buf
, forever
);
9072 /* Read a packet from the remote machine, with error checking, and
9073 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9074 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9075 rather than timing out; this is used (in synchronous mode) to wait
9076 for a target that is is executing user code to stop. If FOREVER ==
9077 0, this function is allowed to time out gracefully and return an
9078 indication of this to the caller. Otherwise return the number of
9079 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9080 enough reason to return to the caller. *IS_NOTIF is an output
9081 boolean that indicates whether *BUF holds a notification or not
9082 (a regular packet). */
9085 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
9086 int expecting_notif
, int *is_notif
)
9088 struct remote_state
*rs
= get_remote_state ();
9094 /* We're reading a new response. Make sure we don't look at a
9095 previously cached response. */
9096 rs
->cached_wait_status
= 0;
9098 strcpy (*buf
, "timeout");
9101 timeout
= watchdog
> 0 ? watchdog
: -1;
9102 else if (expecting_notif
)
9103 timeout
= 0; /* There should already be a char in the buffer. If
9106 timeout
= remote_timeout
;
9110 /* Process any number of notifications, and then return when
9114 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9116 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9118 /* This can loop forever if the remote side sends us
9119 characters continuously, but if it pauses, we'll get
9120 SERIAL_TIMEOUT from readchar because of timeout. Then
9121 we'll count that as a retry.
9123 Note that even when forever is set, we will only wait
9124 forever prior to the start of a packet. After that, we
9125 expect characters to arrive at a brisk pace. They should
9126 show up within remote_timeout intervals. */
9128 c
= readchar (timeout
);
9129 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9131 if (c
== SERIAL_TIMEOUT
)
9133 if (expecting_notif
)
9134 return -1; /* Don't complain, it's normal to not get
9135 anything in this case. */
9137 if (forever
) /* Watchdog went off? Kill the target. */
9139 remote_unpush_target ();
9140 throw_error (TARGET_CLOSE_ERROR
,
9141 _("Watchdog timeout has expired. "
9142 "Target detached."));
9145 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9149 /* We've found the start of a packet or notification.
9150 Now collect the data. */
9151 val
= read_frame (buf
, sizeof_buf
);
9156 remote_serial_write ("-", 1);
9159 if (tries
> MAX_TRIES
)
9161 /* We have tried hard enough, and just can't receive the
9162 packet/notification. Give up. */
9163 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9165 /* Skip the ack char if we're in no-ack mode. */
9166 if (!rs
->noack_mode
)
9167 remote_serial_write ("+", 1);
9171 /* If we got an ordinary packet, return that to our caller. */
9177 = escape_buffer (*buf
,
9178 std::min (val
, REMOTE_DEBUG_MAX_CHAR
));
9180 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9183 if (str
.length () > REMOTE_DEBUG_MAX_CHAR
)
9185 fprintf_unfiltered (gdb_stdlog
, "[%zu bytes omitted]",
9186 str
.length () - REMOTE_DEBUG_MAX_CHAR
);
9189 fprintf_unfiltered (gdb_stdlog
, "\n");
9192 /* Skip the ack char if we're in no-ack mode. */
9193 if (!rs
->noack_mode
)
9194 remote_serial_write ("+", 1);
9195 if (is_notif
!= NULL
)
9200 /* If we got a notification, handle it, and go back to looking
9204 gdb_assert (c
== '%');
9208 std::string str
= escape_buffer (*buf
, val
);
9210 fprintf_unfiltered (gdb_stdlog
,
9211 " Notification received: %s\n",
9214 if (is_notif
!= NULL
)
9217 handle_notification (rs
->notif_state
, *buf
);
9219 /* Notifications require no acknowledgement. */
9221 if (expecting_notif
)
9228 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
9230 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0, NULL
);
9234 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
9237 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1,
9241 /* Check whether EVENT is a fork event for the process specified
9242 by the pid passed in DATA, and if it is, kill the fork child. */
9245 kill_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
9246 QUEUE_ITER (stop_reply_p
) *iter
,
9250 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
9251 int parent_pid
= *(int *) param
->input
;
9253 if (is_pending_fork_parent (&event
->ws
, parent_pid
, event
->ptid
))
9255 struct remote_state
*rs
= get_remote_state ();
9256 int child_pid
= ptid_get_pid (event
->ws
.value
.related_pid
);
9259 res
= remote_vkill (child_pid
, rs
);
9261 error (_("Can't kill fork child process %d"), child_pid
);
9267 /* Kill any new fork children of process PID that haven't been
9268 processed by follow_fork. */
9271 kill_new_fork_children (int pid
, struct remote_state
*rs
)
9273 struct thread_info
*thread
;
9274 struct notif_client
*notif
= ¬if_client_stop
;
9275 struct queue_iter_param param
;
9277 /* Kill the fork child threads of any threads in process PID
9278 that are stopped at a fork event. */
9279 ALL_NON_EXITED_THREADS (thread
)
9281 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9283 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9285 struct remote_state
*rs
= get_remote_state ();
9286 int child_pid
= ptid_get_pid (ws
->value
.related_pid
);
9289 res
= remote_vkill (child_pid
, rs
);
9291 error (_("Can't kill fork child process %d"), child_pid
);
9295 /* Check for any pending fork events (not reported or processed yet)
9296 in process PID and kill those fork child threads as well. */
9297 remote_notif_get_pending_events (notif
);
9299 param
.output
= NULL
;
9300 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
9301 kill_child_of_pending_fork
, ¶m
);
9305 /* Target hook to kill the current inferior. */
9308 remote_kill (struct target_ops
*ops
)
9311 int pid
= ptid_get_pid (inferior_ptid
);
9312 struct remote_state
*rs
= get_remote_state ();
9314 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9316 /* If we're stopped while forking and we haven't followed yet,
9317 kill the child task. We need to do this before killing the
9318 parent task because if this is a vfork then the parent will
9320 kill_new_fork_children (pid
, rs
);
9322 res
= remote_vkill (pid
, rs
);
9325 target_mourn_inferior (inferior_ptid
);
9330 /* If we are in 'target remote' mode and we are killing the only
9331 inferior, then we will tell gdbserver to exit and unpush the
9333 if (res
== -1 && !remote_multi_process_p (rs
)
9334 && number_of_live_inferiors () == 1)
9338 /* We've killed the remote end, we get to mourn it. If we are
9339 not in extended mode, mourning the inferior also unpushes
9340 remote_ops from the target stack, which closes the remote
9342 target_mourn_inferior (inferior_ptid
);
9347 error (_("Can't kill process"));
9350 /* Send a kill request to the target using the 'vKill' packet. */
9353 remote_vkill (int pid
, struct remote_state
*rs
)
9355 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9358 /* Tell the remote target to detach. */
9359 xsnprintf (rs
->buf
, get_remote_packet_size (), "vKill;%x", pid
);
9361 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9363 switch (packet_ok (rs
->buf
,
9364 &remote_protocol_packets
[PACKET_vKill
]))
9370 case PACKET_UNKNOWN
:
9373 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9377 /* Send a kill request to the target using the 'k' packet. */
9380 remote_kill_k (void)
9382 /* Catch errors so the user can quit from gdb even when we
9383 aren't on speaking terms with the remote system. */
9388 CATCH (ex
, RETURN_MASK_ERROR
)
9390 if (ex
.error
== TARGET_CLOSE_ERROR
)
9392 /* If we got an (EOF) error that caused the target
9393 to go away, then we're done, that's what we wanted.
9394 "k" is susceptible to cause a premature EOF, given
9395 that the remote server isn't actually required to
9396 reply to "k", and it can happen that it doesn't
9397 even get to reply ACK to the "k". */
9401 /* Otherwise, something went wrong. We didn't actually kill
9402 the target. Just propagate the exception, and let the
9403 user or higher layers decide what to do. */
9404 throw_exception (ex
);
9410 remote_mourn (struct target_ops
*target
)
9412 struct remote_state
*rs
= get_remote_state ();
9414 /* In 'target remote' mode with one inferior, we close the connection. */
9415 if (!rs
->extended
&& number_of_live_inferiors () <= 1)
9417 unpush_target (target
);
9419 /* remote_close takes care of doing most of the clean up. */
9420 generic_mourn_inferior ();
9424 /* In case we got here due to an error, but we're going to stay
9426 rs
->waiting_for_stop_reply
= 0;
9428 /* If the current general thread belonged to the process we just
9429 detached from or has exited, the remote side current general
9430 thread becomes undefined. Considering a case like this:
9432 - We just got here due to a detach.
9433 - The process that we're detaching from happens to immediately
9434 report a global breakpoint being hit in non-stop mode, in the
9435 same thread we had selected before.
9436 - GDB attaches to this process again.
9437 - This event happens to be the next event we handle.
9439 GDB would consider that the current general thread didn't need to
9440 be set on the stub side (with Hg), since for all it knew,
9441 GENERAL_THREAD hadn't changed.
9443 Notice that although in all-stop mode, the remote server always
9444 sets the current thread to the thread reporting the stop event,
9445 that doesn't happen in non-stop mode; in non-stop, the stub *must
9446 not* change the current thread when reporting a breakpoint hit,
9447 due to the decoupling of event reporting and event handling.
9449 To keep things simple, we always invalidate our notion of the
9451 record_currthread (rs
, minus_one_ptid
);
9453 /* Call common code to mark the inferior as not running. */
9454 generic_mourn_inferior ();
9456 if (!have_inferiors ())
9458 if (!remote_multi_process_p (rs
))
9460 /* Check whether the target is running now - some remote stubs
9461 automatically restart after kill. */
9463 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9465 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
9467 /* Assume that the target has been restarted. Set
9468 inferior_ptid so that bits of core GDB realizes
9469 there's something here, e.g., so that the user can
9470 say "kill" again. */
9471 inferior_ptid
= magic_null_ptid
;
9478 extended_remote_supports_disable_randomization (struct target_ops
*self
)
9480 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9484 extended_remote_disable_randomization (int val
)
9486 struct remote_state
*rs
= get_remote_state ();
9489 xsnprintf (rs
->buf
, get_remote_packet_size (), "QDisableRandomization:%x",
9492 reply
= remote_get_noisy_reply ();
9494 error (_("Target does not support QDisableRandomization."));
9495 if (strcmp (reply
, "OK") != 0)
9496 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
9500 extended_remote_run (const std::string
&args
)
9502 struct remote_state
*rs
= get_remote_state ();
9504 const char *remote_exec_file
= get_remote_exec_file ();
9506 /* If the user has disabled vRun support, or we have detected that
9507 support is not available, do not try it. */
9508 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
9511 strcpy (rs
->buf
, "vRun;");
9512 len
= strlen (rs
->buf
);
9514 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
9515 error (_("Remote file name too long for run packet"));
9516 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
,
9517 strlen (remote_exec_file
));
9523 gdb_argv
argv (args
.c_str ());
9524 for (i
= 0; argv
[i
] != NULL
; i
++)
9526 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
9527 error (_("Argument list too long for run packet"));
9528 rs
->buf
[len
++] = ';';
9529 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
,
9534 rs
->buf
[len
++] = '\0';
9537 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9539 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
9542 /* We have a wait response. All is well. */
9544 case PACKET_UNKNOWN
:
9547 if (remote_exec_file
[0] == '\0')
9548 error (_("Running the default executable on the remote target failed; "
9549 "try \"set remote exec-file\"?"));
9551 error (_("Running \"%s\" on the remote target failed"),
9554 gdb_assert_not_reached (_("bad switch"));
9558 /* Helper function to send set/unset environment packets. ACTION is
9559 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9560 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9564 send_environment_packet (struct remote_state
*rs
,
9569 /* Convert the environment variable to an hex string, which
9570 is the best format to be transmitted over the wire. */
9571 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
9574 xsnprintf (rs
->buf
, get_remote_packet_size (),
9575 "%s:%s", packet
, encoded_value
.c_str ());
9578 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9579 if (strcmp (rs
->buf
, "OK") != 0)
9580 warning (_("Unable to %s environment variable '%s' on remote."),
9584 /* Helper function to handle the QEnvironment* packets. */
9587 extended_remote_environment_support (struct remote_state
*rs
)
9589 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
9591 putpkt ("QEnvironmentReset");
9592 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9593 if (strcmp (rs
->buf
, "OK") != 0)
9594 warning (_("Unable to reset environment on remote."));
9597 gdb_environ
*e
= ¤t_inferior ()->environment
;
9599 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
9600 for (const std::string
&el
: e
->user_set_env ())
9601 send_environment_packet (rs
, "set", "QEnvironmentHexEncoded",
9604 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
9605 for (const std::string
&el
: e
->user_unset_env ())
9606 send_environment_packet (rs
, "unset", "QEnvironmentUnset", el
.c_str ());
9609 /* Helper function to set the current working directory for the
9610 inferior in the remote target. */
9613 extended_remote_set_inferior_cwd (struct remote_state
*rs
)
9615 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
9617 const char *inferior_cwd
= get_inferior_cwd ();
9619 if (inferior_cwd
!= NULL
)
9621 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
9622 strlen (inferior_cwd
));
9624 xsnprintf (rs
->buf
, get_remote_packet_size (),
9625 "QSetWorkingDir:%s", hexpath
.c_str ());
9629 /* An empty inferior_cwd means that the user wants us to
9630 reset the remote server's inferior's cwd. */
9631 xsnprintf (rs
->buf
, get_remote_packet_size (),
9636 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9637 if (packet_ok (rs
->buf
,
9638 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
9641 Remote replied unexpectedly while setting the inferior's working\n\
9648 /* In the extended protocol we want to be able to do things like
9649 "run" and have them basically work as expected. So we need
9650 a special create_inferior function. We support changing the
9651 executable file and the command line arguments, but not the
9655 extended_remote_create_inferior (struct target_ops
*ops
,
9656 const char *exec_file
,
9657 const std::string
&args
,
9658 char **env
, int from_tty
)
9662 struct remote_state
*rs
= get_remote_state ();
9663 const char *remote_exec_file
= get_remote_exec_file ();
9665 /* If running asynchronously, register the target file descriptor
9666 with the event loop. */
9667 if (target_can_async_p ())
9670 /* Disable address space randomization if requested (and supported). */
9671 if (extended_remote_supports_disable_randomization (ops
))
9672 extended_remote_disable_randomization (disable_randomization
);
9674 /* If startup-with-shell is on, we inform gdbserver to start the
9675 remote inferior using a shell. */
9676 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
9678 xsnprintf (rs
->buf
, get_remote_packet_size (),
9679 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
9681 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9682 if (strcmp (rs
->buf
, "OK") != 0)
9684 Remote replied unexpectedly while setting startup-with-shell: %s"),
9688 extended_remote_environment_support (rs
);
9690 extended_remote_set_inferior_cwd (rs
);
9692 /* Now restart the remote server. */
9693 run_worked
= extended_remote_run (args
) != -1;
9696 /* vRun was not supported. Fail if we need it to do what the
9698 if (remote_exec_file
[0])
9699 error (_("Remote target does not support \"set remote exec-file\""));
9701 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9703 /* Fall back to "R". */
9704 extended_remote_restart ();
9707 if (!have_inferiors ())
9709 /* Clean up from the last time we ran, before we mark the target
9710 running again. This will mark breakpoints uninserted, and
9711 get_offsets may insert breakpoints. */
9712 init_thread_list ();
9713 init_wait_for_inferior ();
9716 /* vRun's success return is a stop reply. */
9717 stop_reply
= run_worked
? rs
->buf
: NULL
;
9718 add_current_inferior_and_thread (stop_reply
);
9720 /* Get updated offsets, if the stub uses qOffsets. */
9725 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9726 the list of conditions (in agent expression bytecode format), if any, the
9727 target needs to evaluate. The output is placed into the packet buffer
9728 started from BUF and ended at BUF_END. */
9731 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
9732 struct bp_target_info
*bp_tgt
, char *buf
,
9735 if (bp_tgt
->conditions
.empty ())
9738 buf
+= strlen (buf
);
9739 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
9742 /* Send conditions to the target. */
9743 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
9745 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
9746 buf
+= strlen (buf
);
9747 for (int i
= 0; i
< aexpr
->len
; ++i
)
9748 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9755 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
9756 struct bp_target_info
*bp_tgt
, char *buf
)
9758 if (bp_tgt
->tcommands
.empty ())
9761 buf
+= strlen (buf
);
9763 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
9764 buf
+= strlen (buf
);
9766 /* Concatenate all the agent expressions that are commands into the
9768 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
9770 sprintf (buf
, "X%x,", aexpr
->len
);
9771 buf
+= strlen (buf
);
9772 for (int i
= 0; i
< aexpr
->len
; ++i
)
9773 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9778 /* Insert a breakpoint. On targets that have software breakpoint
9779 support, we ask the remote target to do the work; on targets
9780 which don't, we insert a traditional memory breakpoint. */
9783 remote_insert_breakpoint (struct target_ops
*ops
,
9784 struct gdbarch
*gdbarch
,
9785 struct bp_target_info
*bp_tgt
)
9787 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9788 If it succeeds, then set the support to PACKET_ENABLE. If it
9789 fails, and the user has explicitly requested the Z support then
9790 report an error, otherwise, mark it disabled and go on. */
9792 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9794 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
9795 struct remote_state
*rs
;
9799 /* Make sure the remote is pointing at the right process, if
9801 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9802 set_general_process ();
9804 rs
= get_remote_state ();
9806 endbuf
= rs
->buf
+ get_remote_packet_size ();
9811 addr
= (ULONGEST
) remote_address_masked (addr
);
9812 p
+= hexnumstr (p
, addr
);
9813 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9815 if (remote_supports_cond_breakpoints (ops
))
9816 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
9818 if (remote_can_run_breakpoint_commands (ops
))
9819 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
9822 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9824 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
9830 case PACKET_UNKNOWN
:
9835 /* If this breakpoint has target-side commands but this stub doesn't
9836 support Z0 packets, throw error. */
9837 if (!bp_tgt
->tcommands
.empty ())
9838 throw_error (NOT_SUPPORTED_ERROR
, _("\
9839 Target doesn't support breakpoints that have target side commands."));
9841 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
9845 remote_remove_breakpoint (struct target_ops
*ops
,
9846 struct gdbarch
*gdbarch
,
9847 struct bp_target_info
*bp_tgt
,
9848 enum remove_bp_reason reason
)
9850 CORE_ADDR addr
= bp_tgt
->placed_address
;
9851 struct remote_state
*rs
= get_remote_state ();
9853 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9856 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9858 /* Make sure the remote is pointing at the right process, if
9860 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9861 set_general_process ();
9867 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
9868 p
+= hexnumstr (p
, addr
);
9869 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9872 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9874 return (rs
->buf
[0] == 'E');
9877 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
, reason
);
9880 static enum Z_packet_type
9881 watchpoint_to_Z_packet (int type
)
9886 return Z_PACKET_WRITE_WP
;
9889 return Z_PACKET_READ_WP
;
9892 return Z_PACKET_ACCESS_WP
;
9895 internal_error (__FILE__
, __LINE__
,
9896 _("hw_bp_to_z: bad watchpoint type %d"), type
);
9901 remote_insert_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9902 enum target_hw_bp_type type
, struct expression
*cond
)
9904 struct remote_state
*rs
= get_remote_state ();
9905 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9907 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9909 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9912 /* Make sure the remote is pointing at the right process, if
9914 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9915 set_general_process ();
9917 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "Z%x,", packet
);
9918 p
= strchr (rs
->buf
, '\0');
9919 addr
= remote_address_masked (addr
);
9920 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9921 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9924 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9926 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9930 case PACKET_UNKNOWN
:
9935 internal_error (__FILE__
, __LINE__
,
9936 _("remote_insert_watchpoint: reached end of function"));
9940 remote_watchpoint_addr_within_range (struct target_ops
*target
, CORE_ADDR addr
,
9941 CORE_ADDR start
, int length
)
9943 CORE_ADDR diff
= remote_address_masked (addr
- start
);
9945 return diff
< length
;
9950 remote_remove_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9951 enum target_hw_bp_type type
, struct expression
*cond
)
9953 struct remote_state
*rs
= get_remote_state ();
9954 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9956 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9958 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9961 /* Make sure the remote is pointing at the right process, if
9963 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9964 set_general_process ();
9966 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "z%x,", packet
);
9967 p
= strchr (rs
->buf
, '\0');
9968 addr
= remote_address_masked (addr
);
9969 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9970 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9972 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9974 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9977 case PACKET_UNKNOWN
:
9982 internal_error (__FILE__
, __LINE__
,
9983 _("remote_remove_watchpoint: reached end of function"));
9987 int remote_hw_watchpoint_limit
= -1;
9988 int remote_hw_watchpoint_length_limit
= -1;
9989 int remote_hw_breakpoint_limit
= -1;
9992 remote_region_ok_for_hw_watchpoint (struct target_ops
*self
,
9993 CORE_ADDR addr
, int len
)
9995 if (remote_hw_watchpoint_length_limit
== 0)
9997 else if (remote_hw_watchpoint_length_limit
< 0)
9999 else if (len
<= remote_hw_watchpoint_length_limit
)
10006 remote_check_watch_resources (struct target_ops
*self
,
10007 enum bptype type
, int cnt
, int ot
)
10009 if (type
== bp_hardware_breakpoint
)
10011 if (remote_hw_breakpoint_limit
== 0)
10013 else if (remote_hw_breakpoint_limit
< 0)
10015 else if (cnt
<= remote_hw_breakpoint_limit
)
10020 if (remote_hw_watchpoint_limit
== 0)
10022 else if (remote_hw_watchpoint_limit
< 0)
10026 else if (cnt
<= remote_hw_watchpoint_limit
)
10032 /* The to_stopped_by_sw_breakpoint method of target remote. */
10035 remote_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10037 struct thread_info
*thread
= inferior_thread ();
10039 return (thread
->priv
!= NULL
10040 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_SW_BREAKPOINT
);
10043 /* The to_supports_stopped_by_sw_breakpoint method of target
10047 remote_supports_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10049 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10052 /* The to_stopped_by_hw_breakpoint method of target remote. */
10055 remote_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10057 struct thread_info
*thread
= inferior_thread ();
10059 return (thread
->priv
!= NULL
10060 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_HW_BREAKPOINT
);
10063 /* The to_supports_stopped_by_hw_breakpoint method of target
10067 remote_supports_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10069 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10073 remote_stopped_by_watchpoint (struct target_ops
*ops
)
10075 struct thread_info
*thread
= inferior_thread ();
10077 return (thread
->priv
!= NULL
10078 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_WATCHPOINT
);
10082 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
10084 struct thread_info
*thread
= inferior_thread ();
10086 if (thread
->priv
!= NULL
10087 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_WATCHPOINT
)
10089 *addr_p
= thread
->priv
->watch_data_address
;
10098 remote_insert_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10099 struct bp_target_info
*bp_tgt
)
10101 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10102 struct remote_state
*rs
;
10106 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10109 /* Make sure the remote is pointing at the right process, if
10111 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10112 set_general_process ();
10114 rs
= get_remote_state ();
10116 endbuf
= rs
->buf
+ get_remote_packet_size ();
10122 addr
= remote_address_masked (addr
);
10123 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10124 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10126 if (remote_supports_cond_breakpoints (self
))
10127 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10129 if (remote_can_run_breakpoint_commands (self
))
10130 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10133 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10135 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10138 if (rs
->buf
[1] == '.')
10140 message
= strchr (rs
->buf
+ 2, '.');
10142 error (_("Remote failure reply: %s"), message
+ 1);
10145 case PACKET_UNKNOWN
:
10150 internal_error (__FILE__
, __LINE__
,
10151 _("remote_insert_hw_breakpoint: reached end of function"));
10156 remote_remove_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10157 struct bp_target_info
*bp_tgt
)
10160 struct remote_state
*rs
= get_remote_state ();
10162 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10164 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10167 /* Make sure the remote is pointing at the right process, if
10169 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10170 set_general_process ();
10176 addr
= remote_address_masked (bp_tgt
->placed_address
);
10177 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10178 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10181 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10183 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10186 case PACKET_UNKNOWN
:
10191 internal_error (__FILE__
, __LINE__
,
10192 _("remote_remove_hw_breakpoint: reached end of function"));
10195 /* Verify memory using the "qCRC:" request. */
10198 remote_verify_memory (struct target_ops
*ops
,
10199 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10201 struct remote_state
*rs
= get_remote_state ();
10202 unsigned long host_crc
, target_crc
;
10205 /* It doesn't make sense to use qCRC if the remote target is
10206 connected but not running. */
10207 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10209 enum packet_result result
;
10211 /* Make sure the remote is pointing at the right process. */
10212 set_general_process ();
10214 /* FIXME: assumes lma can fit into long. */
10215 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
10216 (long) lma
, (long) size
);
10219 /* Be clever; compute the host_crc before waiting for target
10221 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10223 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10225 result
= packet_ok (rs
->buf
,
10226 &remote_protocol_packets
[PACKET_qCRC
]);
10227 if (result
== PACKET_ERROR
)
10229 else if (result
== PACKET_OK
)
10231 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10232 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10234 return (host_crc
== target_crc
);
10238 return simple_verify_memory (ops
, data
, lma
, size
);
10241 /* compare-sections command
10243 With no arguments, compares each loadable section in the exec bfd
10244 with the same memory range on the target, and reports mismatches.
10245 Useful for verifying the image on the target against the exec file. */
10248 compare_sections_command (const char *args
, int from_tty
)
10251 gdb_byte
*sectdata
;
10252 const char *sectname
;
10253 bfd_size_type size
;
10256 int mismatched
= 0;
10261 error (_("command cannot be used without an exec file"));
10263 /* Make sure the remote is pointing at the right process. */
10264 set_general_process ();
10266 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10272 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10274 if (!(s
->flags
& SEC_LOAD
))
10275 continue; /* Skip non-loadable section. */
10277 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10278 continue; /* Skip writeable sections */
10280 size
= bfd_get_section_size (s
);
10282 continue; /* Skip zero-length section. */
10284 sectname
= bfd_get_section_name (exec_bfd
, s
);
10285 if (args
&& strcmp (args
, sectname
) != 0)
10286 continue; /* Not the section selected by user. */
10288 matched
= 1; /* Do this section. */
10291 gdb::byte_vector
sectdata (size
);
10292 bfd_get_section_contents (exec_bfd
, s
, sectdata
.data (), 0, size
);
10294 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10297 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10298 paddress (target_gdbarch (), lma
),
10299 paddress (target_gdbarch (), lma
+ size
));
10301 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10302 paddress (target_gdbarch (), lma
),
10303 paddress (target_gdbarch (), lma
+ size
));
10305 printf_filtered ("matched.\n");
10308 printf_filtered ("MIS-MATCHED!\n");
10312 if (mismatched
> 0)
10313 warning (_("One or more sections of the target image does not match\n\
10314 the loaded file\n"));
10315 if (args
&& !matched
)
10316 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10319 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10320 into remote target. The number of bytes written to the remote
10321 target is returned, or -1 for error. */
10323 static enum target_xfer_status
10324 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
10325 const char *annex
, const gdb_byte
*writebuf
,
10326 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
,
10327 struct packet_config
*packet
)
10331 struct remote_state
*rs
= get_remote_state ();
10332 int max_size
= get_memory_write_packet_size ();
10334 if (packet
->support
== PACKET_DISABLE
)
10335 return TARGET_XFER_E_IO
;
10337 /* Insert header. */
10338 i
= snprintf (rs
->buf
, max_size
,
10339 "qXfer:%s:write:%s:%s:",
10340 object_name
, annex
? annex
: "",
10341 phex_nz (offset
, sizeof offset
));
10342 max_size
-= (i
+ 1);
10344 /* Escape as much data as fits into rs->buf. */
10345 buf_len
= remote_escape_output
10346 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
+ i
, &max_size
, max_size
);
10348 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
10349 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10350 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10351 return TARGET_XFER_E_IO
;
10353 unpack_varlen_hex (rs
->buf
, &n
);
10356 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10359 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10360 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10361 number of bytes read is returned, or 0 for EOF, or -1 for error.
10362 The number of bytes read may be less than LEN without indicating an
10363 EOF. PACKET is checked and updated to indicate whether the remote
10364 target supports this object. */
10366 static enum target_xfer_status
10367 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
10369 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
10370 ULONGEST
*xfered_len
,
10371 struct packet_config
*packet
)
10373 struct remote_state
*rs
= get_remote_state ();
10374 LONGEST i
, n
, packet_len
;
10376 if (packet
->support
== PACKET_DISABLE
)
10377 return TARGET_XFER_E_IO
;
10379 /* Check whether we've cached an end-of-object packet that matches
10381 if (rs
->finished_object
)
10383 if (strcmp (object_name
, rs
->finished_object
) == 0
10384 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10385 && offset
== rs
->finished_offset
)
10386 return TARGET_XFER_EOF
;
10389 /* Otherwise, we're now reading something different. Discard
10391 xfree (rs
->finished_object
);
10392 xfree (rs
->finished_annex
);
10393 rs
->finished_object
= NULL
;
10394 rs
->finished_annex
= NULL
;
10397 /* Request only enough to fit in a single packet. The actual data
10398 may not, since we don't know how much of it will need to be escaped;
10399 the target is free to respond with slightly less data. We subtract
10400 five to account for the response type and the protocol frame. */
10401 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10402 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10403 object_name
, annex
? annex
: "",
10404 phex_nz (offset
, sizeof offset
),
10405 phex_nz (n
, sizeof n
));
10406 i
= putpkt (rs
->buf
);
10408 return TARGET_XFER_E_IO
;
10411 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
10412 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10413 return TARGET_XFER_E_IO
;
10415 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10416 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
10418 /* 'm' means there is (or at least might be) more data after this
10419 batch. That does not make sense unless there's at least one byte
10420 of data in this reply. */
10421 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10422 error (_("Remote qXfer reply contained no data."));
10424 /* Got some data. */
10425 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
+ 1,
10426 packet_len
- 1, readbuf
, n
);
10428 /* 'l' is an EOF marker, possibly including a final block of data,
10429 or possibly empty. If we have the final block of a non-empty
10430 object, record this fact to bypass a subsequent partial read. */
10431 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10433 rs
->finished_object
= xstrdup (object_name
);
10434 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10435 rs
->finished_offset
= offset
+ i
;
10439 return TARGET_XFER_EOF
;
10443 return TARGET_XFER_OK
;
10447 static enum target_xfer_status
10448 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
10449 const char *annex
, gdb_byte
*readbuf
,
10450 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10451 ULONGEST
*xfered_len
)
10453 struct remote_state
*rs
;
10457 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10459 set_remote_traceframe ();
10460 set_general_thread (inferior_ptid
);
10462 rs
= get_remote_state ();
10464 /* Handle memory using the standard memory routines. */
10465 if (object
== TARGET_OBJECT_MEMORY
)
10467 /* If the remote target is connected but not running, we should
10468 pass this request down to a lower stratum (e.g. the executable
10470 if (!target_has_execution
)
10471 return TARGET_XFER_EOF
;
10473 if (writebuf
!= NULL
)
10474 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10477 return remote_read_bytes (ops
, offset
, readbuf
, len
, unit_size
,
10481 /* Handle SPU memory using qxfer packets. */
10482 if (object
== TARGET_OBJECT_SPU
)
10485 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
10486 xfered_len
, &remote_protocol_packets
10487 [PACKET_qXfer_spu_read
]);
10489 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
10490 xfered_len
, &remote_protocol_packets
10491 [PACKET_qXfer_spu_write
]);
10494 /* Handle extra signal info using qxfer packets. */
10495 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10498 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
10499 xfered_len
, &remote_protocol_packets
10500 [PACKET_qXfer_siginfo_read
]);
10502 return remote_write_qxfer (ops
, "siginfo", annex
,
10503 writebuf
, offset
, len
, xfered_len
,
10504 &remote_protocol_packets
10505 [PACKET_qXfer_siginfo_write
]);
10508 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10511 return remote_read_qxfer (ops
, "statictrace", annex
,
10512 readbuf
, offset
, len
, xfered_len
,
10513 &remote_protocol_packets
10514 [PACKET_qXfer_statictrace_read
]);
10516 return TARGET_XFER_E_IO
;
10519 /* Only handle flash writes. */
10520 if (writebuf
!= NULL
)
10524 case TARGET_OBJECT_FLASH
:
10525 return remote_flash_write (ops
, offset
, len
, xfered_len
,
10529 return TARGET_XFER_E_IO
;
10533 /* Map pre-existing objects onto letters. DO NOT do this for new
10534 objects!!! Instead specify new query packets. */
10537 case TARGET_OBJECT_AVR
:
10541 case TARGET_OBJECT_AUXV
:
10542 gdb_assert (annex
== NULL
);
10543 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
10545 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
10547 case TARGET_OBJECT_AVAILABLE_FEATURES
:
10548 return remote_read_qxfer
10549 (ops
, "features", annex
, readbuf
, offset
, len
, xfered_len
,
10550 &remote_protocol_packets
[PACKET_qXfer_features
]);
10552 case TARGET_OBJECT_LIBRARIES
:
10553 return remote_read_qxfer
10554 (ops
, "libraries", annex
, readbuf
, offset
, len
, xfered_len
,
10555 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
10557 case TARGET_OBJECT_LIBRARIES_SVR4
:
10558 return remote_read_qxfer
10559 (ops
, "libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
10560 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
10562 case TARGET_OBJECT_MEMORY_MAP
:
10563 gdb_assert (annex
== NULL
);
10564 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
10566 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
10568 case TARGET_OBJECT_OSDATA
:
10569 /* Should only get here if we're connected. */
10570 gdb_assert (rs
->remote_desc
);
10571 return remote_read_qxfer
10572 (ops
, "osdata", annex
, readbuf
, offset
, len
, xfered_len
,
10573 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
10575 case TARGET_OBJECT_THREADS
:
10576 gdb_assert (annex
== NULL
);
10577 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
10579 &remote_protocol_packets
[PACKET_qXfer_threads
]);
10581 case TARGET_OBJECT_TRACEFRAME_INFO
:
10582 gdb_assert (annex
== NULL
);
10583 return remote_read_qxfer
10584 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
10585 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
10587 case TARGET_OBJECT_FDPIC
:
10588 return remote_read_qxfer (ops
, "fdpic", annex
, readbuf
, offset
, len
,
10590 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
10592 case TARGET_OBJECT_OPENVMS_UIB
:
10593 return remote_read_qxfer (ops
, "uib", annex
, readbuf
, offset
, len
,
10595 &remote_protocol_packets
[PACKET_qXfer_uib
]);
10597 case TARGET_OBJECT_BTRACE
:
10598 return remote_read_qxfer (ops
, "btrace", annex
, readbuf
, offset
, len
,
10600 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
10602 case TARGET_OBJECT_BTRACE_CONF
:
10603 return remote_read_qxfer (ops
, "btrace-conf", annex
, readbuf
, offset
,
10605 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
10607 case TARGET_OBJECT_EXEC_FILE
:
10608 return remote_read_qxfer (ops
, "exec-file", annex
, readbuf
, offset
,
10610 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
10613 return TARGET_XFER_E_IO
;
10616 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10617 large enough let the caller deal with it. */
10618 if (len
< get_remote_packet_size ())
10619 return TARGET_XFER_E_IO
;
10620 len
= get_remote_packet_size ();
10622 /* Except for querying the minimum buffer size, target must be open. */
10623 if (!rs
->remote_desc
)
10624 error (_("remote query is only available after target open"));
10626 gdb_assert (annex
!= NULL
);
10627 gdb_assert (readbuf
!= NULL
);
10631 *p2
++ = query_type
;
10633 /* We used one buffer char for the remote protocol q command and
10634 another for the query type. As the remote protocol encapsulation
10635 uses 4 chars plus one extra in case we are debugging
10636 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10639 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
10641 /* Bad caller may have sent forbidden characters. */
10642 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
10647 gdb_assert (annex
[i
] == '\0');
10649 i
= putpkt (rs
->buf
);
10651 return TARGET_XFER_E_IO
;
10653 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10654 strcpy ((char *) readbuf
, rs
->buf
);
10656 *xfered_len
= strlen ((char *) readbuf
);
10657 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10660 /* Implementation of to_get_memory_xfer_limit. */
10663 remote_get_memory_xfer_limit (struct target_ops
*ops
)
10665 return get_memory_write_packet_size ();
10669 remote_search_memory (struct target_ops
* ops
,
10670 CORE_ADDR start_addr
, ULONGEST search_space_len
,
10671 const gdb_byte
*pattern
, ULONGEST pattern_len
,
10672 CORE_ADDR
*found_addrp
)
10674 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
10675 struct remote_state
*rs
= get_remote_state ();
10676 int max_size
= get_memory_write_packet_size ();
10677 struct packet_config
*packet
=
10678 &remote_protocol_packets
[PACKET_qSearch_memory
];
10679 /* Number of packet bytes used to encode the pattern;
10680 this could be more than PATTERN_LEN due to escape characters. */
10681 int escaped_pattern_len
;
10682 /* Amount of pattern that was encodable in the packet. */
10683 int used_pattern_len
;
10686 ULONGEST found_addr
;
10688 /* Don't go to the target if we don't have to.
10689 This is done before checking packet->support to avoid the possibility that
10690 a success for this edge case means the facility works in general. */
10691 if (pattern_len
> search_space_len
)
10693 if (pattern_len
== 0)
10695 *found_addrp
= start_addr
;
10699 /* If we already know the packet isn't supported, fall back to the simple
10700 way of searching memory. */
10702 if (packet_config_support (packet
) == PACKET_DISABLE
)
10704 /* Target doesn't provided special support, fall back and use the
10705 standard support (copy memory and do the search here). */
10706 return simple_search_memory (ops
, start_addr
, search_space_len
,
10707 pattern
, pattern_len
, found_addrp
);
10710 /* Make sure the remote is pointing at the right process. */
10711 set_general_process ();
10713 /* Insert header. */
10714 i
= snprintf (rs
->buf
, max_size
,
10715 "qSearch:memory:%s;%s;",
10716 phex_nz (start_addr
, addr_size
),
10717 phex_nz (search_space_len
, sizeof (search_space_len
)));
10718 max_size
-= (i
+ 1);
10720 /* Escape as much data as fits into rs->buf. */
10721 escaped_pattern_len
=
10722 remote_escape_output (pattern
, pattern_len
, 1, (gdb_byte
*) rs
->buf
+ i
,
10723 &used_pattern_len
, max_size
);
10725 /* Bail if the pattern is too large. */
10726 if (used_pattern_len
!= pattern_len
)
10727 error (_("Pattern is too large to transmit to remote target."));
10729 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
10730 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10731 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10733 /* The request may not have worked because the command is not
10734 supported. If so, fall back to the simple way. */
10735 if (packet
->support
== PACKET_DISABLE
)
10737 return simple_search_memory (ops
, start_addr
, search_space_len
,
10738 pattern
, pattern_len
, found_addrp
);
10743 if (rs
->buf
[0] == '0')
10745 else if (rs
->buf
[0] == '1')
10748 if (rs
->buf
[1] != ',')
10749 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10750 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
10751 *found_addrp
= found_addr
;
10754 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10760 remote_rcmd (struct target_ops
*self
, const char *command
,
10761 struct ui_file
*outbuf
)
10763 struct remote_state
*rs
= get_remote_state ();
10766 if (!rs
->remote_desc
)
10767 error (_("remote rcmd is only available after target open"));
10769 /* Send a NULL command across as an empty command. */
10770 if (command
== NULL
)
10773 /* The query prefix. */
10774 strcpy (rs
->buf
, "qRcmd,");
10775 p
= strchr (rs
->buf
, '\0');
10777 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
10778 > get_remote_packet_size ())
10779 error (_("\"monitor\" command ``%s'' is too long."), command
);
10781 /* Encode the actual command. */
10782 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
10784 if (putpkt (rs
->buf
) < 0)
10785 error (_("Communication problem with target."));
10787 /* get/display the response */
10792 /* XXX - see also remote_get_noisy_reply(). */
10793 QUIT
; /* Allow user to bail out with ^C. */
10795 if (getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) == -1)
10797 /* Timeout. Continue to (try to) read responses.
10798 This is better than stopping with an error, assuming the stub
10799 is still executing the (long) monitor command.
10800 If needed, the user can interrupt gdb using C-c, obtaining
10801 an effect similar to stop on timeout. */
10805 if (buf
[0] == '\0')
10806 error (_("Target does not support this command."));
10807 if (buf
[0] == 'O' && buf
[1] != 'K')
10809 remote_console_output (buf
+ 1); /* 'O' message from stub. */
10812 if (strcmp (buf
, "OK") == 0)
10814 if (strlen (buf
) == 3 && buf
[0] == 'E'
10815 && isdigit (buf
[1]) && isdigit (buf
[2]))
10817 error (_("Protocol error with Rcmd"));
10819 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
10821 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
10823 fputc_unfiltered (c
, outbuf
);
10829 static std::vector
<mem_region
>
10830 remote_memory_map (struct target_ops
*ops
)
10832 std::vector
<mem_region
> result
;
10833 gdb::unique_xmalloc_ptr
<char> text
10834 = target_read_stralloc (¤t_target
, TARGET_OBJECT_MEMORY_MAP
, NULL
);
10837 result
= parse_memory_map (text
.get ());
10843 packet_command (const char *args
, int from_tty
)
10845 struct remote_state
*rs
= get_remote_state ();
10847 if (!rs
->remote_desc
)
10848 error (_("command can only be used with remote target"));
10851 error (_("remote-packet command requires packet text as argument"));
10853 puts_filtered ("sending: ");
10854 print_packet (args
);
10855 puts_filtered ("\n");
10858 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10859 puts_filtered ("received: ");
10860 print_packet (rs
->buf
);
10861 puts_filtered ("\n");
10865 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10867 static void display_thread_info (struct gdb_ext_thread_info
*info
);
10869 static void threadset_test_cmd (char *cmd
, int tty
);
10871 static void threadalive_test (char *cmd
, int tty
);
10873 static void threadlist_test_cmd (char *cmd
, int tty
);
10875 int get_and_display_threadinfo (threadref
*ref
);
10877 static void threadinfo_test_cmd (char *cmd
, int tty
);
10879 static int thread_display_step (threadref
*ref
, void *context
);
10881 static void threadlist_update_test_cmd (char *cmd
, int tty
);
10883 static void init_remote_threadtests (void);
10885 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10888 threadset_test_cmd (const char *cmd
, int tty
)
10890 int sample_thread
= SAMPLE_THREAD
;
10892 printf_filtered (_("Remote threadset test\n"));
10893 set_general_thread (sample_thread
);
10898 threadalive_test (const char *cmd
, int tty
)
10900 int sample_thread
= SAMPLE_THREAD
;
10901 int pid
= ptid_get_pid (inferior_ptid
);
10902 ptid_t ptid
= ptid_build (pid
, sample_thread
, 0);
10904 if (remote_thread_alive (ptid
))
10905 printf_filtered ("PASS: Thread alive test\n");
10907 printf_filtered ("FAIL: Thread alive test\n");
10910 void output_threadid (char *title
, threadref
*ref
);
10913 output_threadid (char *title
, threadref
*ref
)
10917 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
10919 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
10923 threadlist_test_cmd (const char *cmd
, int tty
)
10926 threadref nextthread
;
10927 int done
, result_count
;
10928 threadref threadlist
[3];
10930 printf_filtered ("Remote Threadlist test\n");
10931 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
10932 &result_count
, &threadlist
[0]))
10933 printf_filtered ("FAIL: threadlist test\n");
10936 threadref
*scan
= threadlist
;
10937 threadref
*limit
= scan
+ result_count
;
10939 while (scan
< limit
)
10940 output_threadid (" thread ", scan
++);
10945 display_thread_info (struct gdb_ext_thread_info
*info
)
10947 output_threadid ("Threadid: ", &info
->threadid
);
10948 printf_filtered ("Name: %s\n ", info
->shortname
);
10949 printf_filtered ("State: %s\n", info
->display
);
10950 printf_filtered ("other: %s\n\n", info
->more_display
);
10954 get_and_display_threadinfo (threadref
*ref
)
10958 struct gdb_ext_thread_info threadinfo
;
10960 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
10961 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
10962 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
10963 display_thread_info (&threadinfo
);
10968 threadinfo_test_cmd (const char *cmd
, int tty
)
10970 int athread
= SAMPLE_THREAD
;
10974 int_to_threadref (&thread
, athread
);
10975 printf_filtered ("Remote Threadinfo test\n");
10976 if (!get_and_display_threadinfo (&thread
))
10977 printf_filtered ("FAIL cannot get thread info\n");
10981 thread_display_step (threadref
*ref
, void *context
)
10983 /* output_threadid(" threadstep ",ref); *//* simple test */
10984 return get_and_display_threadinfo (ref
);
10988 threadlist_update_test_cmd (const char *cmd
, int tty
)
10990 printf_filtered ("Remote Threadlist update test\n");
10991 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
10995 init_remote_threadtests (void)
10997 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
10998 _("Fetch and print the remote list of "
10999 "thread identifiers, one pkt only"));
11000 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11001 _("Fetch and display info about one thread"));
11002 add_com ("tset", class_obscure
, threadset_test_cmd
,
11003 _("Test setting to a different thread"));
11004 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11005 _("Iterate through updating all remote thread info"));
11006 add_com ("talive", class_obscure
, threadalive_test
,
11007 _(" Remote thread alive test "));
11012 /* Convert a thread ID to a string. Returns the string in a static
11015 static const char *
11016 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
11018 static char buf
[64];
11019 struct remote_state
*rs
= get_remote_state ();
11021 if (ptid_equal (ptid
, null_ptid
))
11022 return normal_pid_to_str (ptid
);
11023 else if (ptid_is_pid (ptid
))
11025 /* Printing an inferior target id. */
11027 /* When multi-process extensions are off, there's no way in the
11028 remote protocol to know the remote process id, if there's any
11029 at all. There's one exception --- when we're connected with
11030 target extended-remote, and we manually attached to a process
11031 with "attach PID". We don't record anywhere a flag that
11032 allows us to distinguish that case from the case of
11033 connecting with extended-remote and the stub already being
11034 attached to a process, and reporting yes to qAttached, hence
11035 no smart special casing here. */
11036 if (!remote_multi_process_p (rs
))
11038 xsnprintf (buf
, sizeof buf
, "Remote target");
11042 return normal_pid_to_str (ptid
);
11046 if (ptid_equal (magic_null_ptid
, ptid
))
11047 xsnprintf (buf
, sizeof buf
, "Thread <main>");
11048 else if (remote_multi_process_p (rs
))
11049 if (ptid_get_lwp (ptid
) == 0)
11050 return normal_pid_to_str (ptid
);
11052 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
11053 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
11055 xsnprintf (buf
, sizeof buf
, "Thread %ld",
11056 ptid_get_lwp (ptid
));
11061 /* Get the address of the thread local variable in OBJFILE which is
11062 stored at OFFSET within the thread local storage for thread PTID. */
11065 remote_get_thread_local_address (struct target_ops
*ops
,
11066 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
11068 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11070 struct remote_state
*rs
= get_remote_state ();
11072 char *endp
= rs
->buf
+ get_remote_packet_size ();
11073 enum packet_result result
;
11075 strcpy (p
, "qGetTLSAddr:");
11077 p
= write_ptid (p
, endp
, ptid
);
11079 p
+= hexnumstr (p
, offset
);
11081 p
+= hexnumstr (p
, lm
);
11085 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11086 result
= packet_ok (rs
->buf
,
11087 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11088 if (result
== PACKET_OK
)
11092 unpack_varlen_hex (rs
->buf
, &result
);
11095 else if (result
== PACKET_UNKNOWN
)
11096 throw_error (TLS_GENERIC_ERROR
,
11097 _("Remote target doesn't support qGetTLSAddr packet"));
11099 throw_error (TLS_GENERIC_ERROR
,
11100 _("Remote target failed to process qGetTLSAddr request"));
11103 throw_error (TLS_GENERIC_ERROR
,
11104 _("TLS not supported or disabled on this target"));
11109 /* Provide thread local base, i.e. Thread Information Block address.
11110 Returns 1 if ptid is found and thread_local_base is non zero. */
11113 remote_get_tib_address (struct target_ops
*self
, ptid_t ptid
, CORE_ADDR
*addr
)
11115 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11117 struct remote_state
*rs
= get_remote_state ();
11119 char *endp
= rs
->buf
+ get_remote_packet_size ();
11120 enum packet_result result
;
11122 strcpy (p
, "qGetTIBAddr:");
11124 p
= write_ptid (p
, endp
, ptid
);
11128 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11129 result
= packet_ok (rs
->buf
,
11130 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11131 if (result
== PACKET_OK
)
11135 unpack_varlen_hex (rs
->buf
, &result
);
11137 *addr
= (CORE_ADDR
) result
;
11140 else if (result
== PACKET_UNKNOWN
)
11141 error (_("Remote target doesn't support qGetTIBAddr packet"));
11143 error (_("Remote target failed to process qGetTIBAddr request"));
11146 error (_("qGetTIBAddr not supported or disabled on this target"));
11151 /* Support for inferring a target description based on the current
11152 architecture and the size of a 'g' packet. While the 'g' packet
11153 can have any size (since optional registers can be left off the
11154 end), some sizes are easily recognizable given knowledge of the
11155 approximate architecture. */
11157 struct remote_g_packet_guess
11160 const struct target_desc
*tdesc
;
11162 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
11163 DEF_VEC_O(remote_g_packet_guess_s
);
11165 struct remote_g_packet_data
11167 VEC(remote_g_packet_guess_s
) *guesses
;
11170 static struct gdbarch_data
*remote_g_packet_data_handle
;
11173 remote_g_packet_data_init (struct obstack
*obstack
)
11175 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
11179 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11180 const struct target_desc
*tdesc
)
11182 struct remote_g_packet_data
*data
11183 = ((struct remote_g_packet_data
*)
11184 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11185 struct remote_g_packet_guess new_guess
, *guess
;
11188 gdb_assert (tdesc
!= NULL
);
11191 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11193 if (guess
->bytes
== bytes
)
11194 internal_error (__FILE__
, __LINE__
,
11195 _("Duplicate g packet description added for size %d"),
11198 new_guess
.bytes
= bytes
;
11199 new_guess
.tdesc
= tdesc
;
11200 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
11203 /* Return 1 if remote_read_description would do anything on this target
11204 and architecture, 0 otherwise. */
11207 remote_read_description_p (struct target_ops
*target
)
11209 struct remote_g_packet_data
*data
11210 = ((struct remote_g_packet_data
*)
11211 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11213 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11219 static const struct target_desc
*
11220 remote_read_description (struct target_ops
*target
)
11222 struct remote_g_packet_data
*data
11223 = ((struct remote_g_packet_data
*)
11224 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11226 /* Do not try this during initial connection, when we do not know
11227 whether there is a running but stopped thread. */
11228 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
11229 return target
->beneath
->to_read_description (target
->beneath
);
11231 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11233 struct remote_g_packet_guess
*guess
;
11235 int bytes
= send_g_packet ();
11238 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11240 if (guess
->bytes
== bytes
)
11241 return guess
->tdesc
;
11243 /* We discard the g packet. A minor optimization would be to
11244 hold on to it, and fill the register cache once we have selected
11245 an architecture, but it's too tricky to do safely. */
11248 return target
->beneath
->to_read_description (target
->beneath
);
11251 /* Remote file transfer support. This is host-initiated I/O, not
11252 target-initiated; for target-initiated, see remote-fileio.c. */
11254 /* If *LEFT is at least the length of STRING, copy STRING to
11255 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11256 decrease *LEFT. Otherwise raise an error. */
11259 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11261 int len
= strlen (string
);
11264 error (_("Packet too long for target."));
11266 memcpy (*buffer
, string
, len
);
11270 /* NUL-terminate the buffer as a convenience, if there is
11276 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11277 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11278 decrease *LEFT. Otherwise raise an error. */
11281 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11284 if (2 * len
> *left
)
11285 error (_("Packet too long for target."));
11287 bin2hex (bytes
, *buffer
, len
);
11288 *buffer
+= 2 * len
;
11291 /* NUL-terminate the buffer as a convenience, if there is
11297 /* If *LEFT is large enough, convert VALUE to hex and add it to
11298 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11299 decrease *LEFT. Otherwise raise an error. */
11302 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11304 int len
= hexnumlen (value
);
11307 error (_("Packet too long for target."));
11309 hexnumstr (*buffer
, value
);
11313 /* NUL-terminate the buffer as a convenience, if there is
11319 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11320 value, *REMOTE_ERRNO to the remote error number or zero if none
11321 was included, and *ATTACHMENT to point to the start of the annex
11322 if any. The length of the packet isn't needed here; there may
11323 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11325 Return 0 if the packet could be parsed, -1 if it could not. If
11326 -1 is returned, the other variables may not be initialized. */
11329 remote_hostio_parse_result (char *buffer
, int *retcode
,
11330 int *remote_errno
, char **attachment
)
11335 *attachment
= NULL
;
11337 if (buffer
[0] != 'F')
11341 *retcode
= strtol (&buffer
[1], &p
, 16);
11342 if (errno
!= 0 || p
== &buffer
[1])
11345 /* Check for ",errno". */
11349 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11350 if (errno
!= 0 || p
+ 1 == p2
)
11355 /* Check for ";attachment". If there is no attachment, the
11356 packet should end here. */
11359 *attachment
= p
+ 1;
11362 else if (*p
== '\0')
11368 /* Send a prepared I/O packet to the target and read its response.
11369 The prepared packet is in the global RS->BUF before this function
11370 is called, and the answer is there when we return.
11372 COMMAND_BYTES is the length of the request to send, which may include
11373 binary data. WHICH_PACKET is the packet configuration to check
11374 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11375 is set to the error number and -1 is returned. Otherwise the value
11376 returned by the function is returned.
11378 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11379 attachment is expected; an error will be reported if there's a
11380 mismatch. If one is found, *ATTACHMENT will be set to point into
11381 the packet buffer and *ATTACHMENT_LEN will be set to the
11382 attachment's length. */
11385 remote_hostio_send_command (int command_bytes
, int which_packet
,
11386 int *remote_errno
, char **attachment
,
11387 int *attachment_len
)
11389 struct remote_state
*rs
= get_remote_state ();
11390 int ret
, bytes_read
;
11391 char *attachment_tmp
;
11393 if (!rs
->remote_desc
11394 || packet_support (which_packet
) == PACKET_DISABLE
)
11396 *remote_errno
= FILEIO_ENOSYS
;
11400 putpkt_binary (rs
->buf
, command_bytes
);
11401 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
11403 /* If it timed out, something is wrong. Don't try to parse the
11405 if (bytes_read
< 0)
11407 *remote_errno
= FILEIO_EINVAL
;
11411 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11414 *remote_errno
= FILEIO_EINVAL
;
11416 case PACKET_UNKNOWN
:
11417 *remote_errno
= FILEIO_ENOSYS
;
11423 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
11426 *remote_errno
= FILEIO_EINVAL
;
11430 /* Make sure we saw an attachment if and only if we expected one. */
11431 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11432 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11434 *remote_errno
= FILEIO_EINVAL
;
11438 /* If an attachment was found, it must point into the packet buffer;
11439 work out how many bytes there were. */
11440 if (attachment_tmp
!= NULL
)
11442 *attachment
= attachment_tmp
;
11443 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
11449 /* Invalidate the readahead cache. */
11452 readahead_cache_invalidate (void)
11454 struct remote_state
*rs
= get_remote_state ();
11456 rs
->readahead_cache
.fd
= -1;
11459 /* Invalidate the readahead cache if it is holding data for FD. */
11462 readahead_cache_invalidate_fd (int fd
)
11464 struct remote_state
*rs
= get_remote_state ();
11466 if (rs
->readahead_cache
.fd
== fd
)
11467 rs
->readahead_cache
.fd
= -1;
11470 /* Set the filesystem remote_hostio functions that take FILENAME
11471 arguments will use. Return 0 on success, or -1 if an error
11472 occurs (and set *REMOTE_ERRNO). */
11475 remote_hostio_set_filesystem (struct inferior
*inf
, int *remote_errno
)
11477 struct remote_state
*rs
= get_remote_state ();
11478 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11480 int left
= get_remote_packet_size () - 1;
11484 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11487 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11490 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11492 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11493 remote_buffer_add_string (&p
, &left
, arg
);
11495 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_setfs
,
11496 remote_errno
, NULL
, NULL
);
11498 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11502 rs
->fs_pid
= required_pid
;
11507 /* Implementation of to_fileio_open. */
11510 remote_hostio_open (struct target_ops
*self
,
11511 struct inferior
*inf
, const char *filename
,
11512 int flags
, int mode
, int warn_if_slow
,
11515 struct remote_state
*rs
= get_remote_state ();
11517 int left
= get_remote_packet_size () - 1;
11521 static int warning_issued
= 0;
11523 printf_unfiltered (_("Reading %s from remote target...\n"),
11526 if (!warning_issued
)
11528 warning (_("File transfers from remote targets can be slow."
11529 " Use \"set sysroot\" to access files locally"
11531 warning_issued
= 1;
11535 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11538 remote_buffer_add_string (&p
, &left
, "vFile:open:");
11540 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11541 strlen (filename
));
11542 remote_buffer_add_string (&p
, &left
, ",");
11544 remote_buffer_add_int (&p
, &left
, flags
);
11545 remote_buffer_add_string (&p
, &left
, ",");
11547 remote_buffer_add_int (&p
, &left
, mode
);
11549 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
11550 remote_errno
, NULL
, NULL
);
11553 /* Implementation of to_fileio_pwrite. */
11556 remote_hostio_pwrite (struct target_ops
*self
,
11557 int fd
, const gdb_byte
*write_buf
, int len
,
11558 ULONGEST offset
, int *remote_errno
)
11560 struct remote_state
*rs
= get_remote_state ();
11562 int left
= get_remote_packet_size ();
11565 readahead_cache_invalidate_fd (fd
);
11567 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
11569 remote_buffer_add_int (&p
, &left
, fd
);
11570 remote_buffer_add_string (&p
, &left
, ",");
11572 remote_buffer_add_int (&p
, &left
, offset
);
11573 remote_buffer_add_string (&p
, &left
, ",");
11575 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
11576 get_remote_packet_size () - (p
- rs
->buf
));
11578 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
11579 remote_errno
, NULL
, NULL
);
11582 /* Helper for the implementation of to_fileio_pread. Read the file
11583 from the remote side with vFile:pread. */
11586 remote_hostio_pread_vFile (struct target_ops
*self
,
11587 int fd
, gdb_byte
*read_buf
, int len
,
11588 ULONGEST offset
, int *remote_errno
)
11590 struct remote_state
*rs
= get_remote_state ();
11593 int left
= get_remote_packet_size ();
11594 int ret
, attachment_len
;
11597 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
11599 remote_buffer_add_int (&p
, &left
, fd
);
11600 remote_buffer_add_string (&p
, &left
, ",");
11602 remote_buffer_add_int (&p
, &left
, len
);
11603 remote_buffer_add_string (&p
, &left
, ",");
11605 remote_buffer_add_int (&p
, &left
, offset
);
11607 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
11608 remote_errno
, &attachment
,
11614 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11616 if (read_len
!= ret
)
11617 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
11622 /* Serve pread from the readahead cache. Returns number of bytes
11623 read, or 0 if the request can't be served from the cache. */
11626 remote_hostio_pread_from_cache (struct remote_state
*rs
,
11627 int fd
, gdb_byte
*read_buf
, size_t len
,
11630 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11632 if (cache
->fd
== fd
11633 && cache
->offset
<= offset
11634 && offset
< cache
->offset
+ cache
->bufsize
)
11636 ULONGEST max
= cache
->offset
+ cache
->bufsize
;
11638 if (offset
+ len
> max
)
11639 len
= max
- offset
;
11641 memcpy (read_buf
, cache
->buf
+ offset
- cache
->offset
, len
);
11648 /* Implementation of to_fileio_pread. */
11651 remote_hostio_pread (struct target_ops
*self
,
11652 int fd
, gdb_byte
*read_buf
, int len
,
11653 ULONGEST offset
, int *remote_errno
)
11656 struct remote_state
*rs
= get_remote_state ();
11657 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11659 ret
= remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11662 cache
->hit_count
++;
11665 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
11666 pulongest (cache
->hit_count
));
11670 cache
->miss_count
++;
11672 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
11673 pulongest (cache
->miss_count
));
11676 cache
->offset
= offset
;
11677 cache
->bufsize
= get_remote_packet_size ();
11678 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
11680 ret
= remote_hostio_pread_vFile (self
, cache
->fd
, cache
->buf
, cache
->bufsize
,
11681 cache
->offset
, remote_errno
);
11684 readahead_cache_invalidate_fd (fd
);
11688 cache
->bufsize
= ret
;
11689 return remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11692 /* Implementation of to_fileio_close. */
11695 remote_hostio_close (struct target_ops
*self
, int fd
, int *remote_errno
)
11697 struct remote_state
*rs
= get_remote_state ();
11699 int left
= get_remote_packet_size () - 1;
11701 readahead_cache_invalidate_fd (fd
);
11703 remote_buffer_add_string (&p
, &left
, "vFile:close:");
11705 remote_buffer_add_int (&p
, &left
, fd
);
11707 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
11708 remote_errno
, NULL
, NULL
);
11711 /* Implementation of to_fileio_unlink. */
11714 remote_hostio_unlink (struct target_ops
*self
,
11715 struct inferior
*inf
, const char *filename
,
11718 struct remote_state
*rs
= get_remote_state ();
11720 int left
= get_remote_packet_size () - 1;
11722 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11725 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
11727 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11728 strlen (filename
));
11730 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
11731 remote_errno
, NULL
, NULL
);
11734 /* Implementation of to_fileio_readlink. */
11737 remote_hostio_readlink (struct target_ops
*self
,
11738 struct inferior
*inf
, const char *filename
,
11741 struct remote_state
*rs
= get_remote_state ();
11744 int left
= get_remote_packet_size ();
11745 int len
, attachment_len
;
11749 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11752 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
11754 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11755 strlen (filename
));
11757 len
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_readlink
,
11758 remote_errno
, &attachment
,
11764 ret
= (char *) xmalloc (len
+ 1);
11766 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11767 (gdb_byte
*) ret
, len
);
11768 if (read_len
!= len
)
11769 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
11775 /* Implementation of to_fileio_fstat. */
11778 remote_hostio_fstat (struct target_ops
*self
,
11779 int fd
, struct stat
*st
,
11782 struct remote_state
*rs
= get_remote_state ();
11784 int left
= get_remote_packet_size ();
11785 int attachment_len
, ret
;
11787 struct fio_stat fst
;
11790 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
11792 remote_buffer_add_int (&p
, &left
, fd
);
11794 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_fstat
,
11795 remote_errno
, &attachment
,
11799 if (*remote_errno
!= FILEIO_ENOSYS
)
11802 /* Strictly we should return -1, ENOSYS here, but when
11803 "set sysroot remote:" was implemented in August 2008
11804 BFD's need for a stat function was sidestepped with
11805 this hack. This was not remedied until March 2015
11806 so we retain the previous behavior to avoid breaking
11809 Note that the memset is a March 2015 addition; older
11810 GDBs set st_size *and nothing else* so the structure
11811 would have garbage in all other fields. This might
11812 break something but retaining the previous behavior
11813 here would be just too wrong. */
11815 memset (st
, 0, sizeof (struct stat
));
11816 st
->st_size
= INT_MAX
;
11820 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11821 (gdb_byte
*) &fst
, sizeof (fst
));
11823 if (read_len
!= ret
)
11824 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
11826 if (read_len
!= sizeof (fst
))
11827 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11828 read_len
, (int) sizeof (fst
));
11830 remote_fileio_to_host_stat (&fst
, st
);
11835 /* Implementation of to_filesystem_is_local. */
11838 remote_filesystem_is_local (struct target_ops
*self
)
11840 /* Valgrind GDB presents itself as a remote target but works
11841 on the local filesystem: it does not implement remote get
11842 and users are not expected to set a sysroot. To handle
11843 this case we treat the remote filesystem as local if the
11844 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11845 does not support vFile:open. */
11846 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
11848 enum packet_support ps
= packet_support (PACKET_vFile_open
);
11850 if (ps
== PACKET_SUPPORT_UNKNOWN
)
11852 int fd
, remote_errno
;
11854 /* Try opening a file to probe support. The supplied
11855 filename is irrelevant, we only care about whether
11856 the stub recognizes the packet or not. */
11857 fd
= remote_hostio_open (self
, NULL
, "just probing",
11858 FILEIO_O_RDONLY
, 0700, 0,
11862 remote_hostio_close (self
, fd
, &remote_errno
);
11864 ps
= packet_support (PACKET_vFile_open
);
11867 if (ps
== PACKET_DISABLE
)
11869 static int warning_issued
= 0;
11871 if (!warning_issued
)
11873 warning (_("remote target does not support file"
11874 " transfer, attempting to access files"
11875 " from local filesystem."));
11876 warning_issued
= 1;
11887 remote_fileio_errno_to_host (int errnum
)
11893 case FILEIO_ENOENT
:
11901 case FILEIO_EACCES
:
11903 case FILEIO_EFAULT
:
11907 case FILEIO_EEXIST
:
11909 case FILEIO_ENODEV
:
11911 case FILEIO_ENOTDIR
:
11913 case FILEIO_EISDIR
:
11915 case FILEIO_EINVAL
:
11917 case FILEIO_ENFILE
:
11919 case FILEIO_EMFILE
:
11923 case FILEIO_ENOSPC
:
11925 case FILEIO_ESPIPE
:
11929 case FILEIO_ENOSYS
:
11931 case FILEIO_ENAMETOOLONG
:
11932 return ENAMETOOLONG
;
11938 remote_hostio_error (int errnum
)
11940 int host_error
= remote_fileio_errno_to_host (errnum
);
11942 if (host_error
== -1)
11943 error (_("Unknown remote I/O error %d"), errnum
);
11945 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
11949 remote_hostio_close_cleanup (void *opaque
)
11951 int fd
= *(int *) opaque
;
11954 remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
);
11958 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
11960 struct cleanup
*back_to
, *close_cleanup
;
11961 int retcode
, fd
, remote_errno
, bytes
, io_size
;
11963 int bytes_in_buffer
;
11966 struct remote_state
*rs
= get_remote_state ();
11968 if (!rs
->remote_desc
)
11969 error (_("command can only be used with remote target"));
11971 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
11973 perror_with_name (local_file
);
11975 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
11976 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
11978 0700, 0, &remote_errno
);
11980 remote_hostio_error (remote_errno
);
11982 /* Send up to this many bytes at once. They won't all fit in the
11983 remote packet limit, so we'll transfer slightly fewer. */
11984 io_size
= get_remote_packet_size ();
11985 buffer
= (gdb_byte
*) xmalloc (io_size
);
11986 back_to
= make_cleanup (xfree
, buffer
);
11988 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
11990 bytes_in_buffer
= 0;
11993 while (bytes_in_buffer
|| !saw_eof
)
11997 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
11998 io_size
- bytes_in_buffer
,
12002 if (ferror (file
.get ()))
12003 error (_("Error reading %s."), local_file
);
12006 /* EOF. Unless there is something still in the
12007 buffer from the last iteration, we are done. */
12009 if (bytes_in_buffer
== 0)
12017 bytes
+= bytes_in_buffer
;
12018 bytes_in_buffer
= 0;
12020 retcode
= remote_hostio_pwrite (find_target_at (process_stratum
),
12022 offset
, &remote_errno
);
12025 remote_hostio_error (remote_errno
);
12026 else if (retcode
== 0)
12027 error (_("Remote write of %d bytes returned 0!"), bytes
);
12028 else if (retcode
< bytes
)
12030 /* Short write. Save the rest of the read data for the next
12032 bytes_in_buffer
= bytes
- retcode
;
12033 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
12039 discard_cleanups (close_cleanup
);
12040 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12041 remote_hostio_error (remote_errno
);
12044 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12045 do_cleanups (back_to
);
12049 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12051 struct cleanup
*back_to
, *close_cleanup
;
12052 int fd
, remote_errno
, bytes
, io_size
;
12055 struct remote_state
*rs
= get_remote_state ();
12057 if (!rs
->remote_desc
)
12058 error (_("command can only be used with remote target"));
12060 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
12061 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12064 remote_hostio_error (remote_errno
);
12066 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12068 perror_with_name (local_file
);
12070 /* Send up to this many bytes at once. They won't all fit in the
12071 remote packet limit, so we'll transfer slightly fewer. */
12072 io_size
= get_remote_packet_size ();
12073 buffer
= (gdb_byte
*) xmalloc (io_size
);
12074 back_to
= make_cleanup (xfree
, buffer
);
12076 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
12081 bytes
= remote_hostio_pread (find_target_at (process_stratum
),
12082 fd
, buffer
, io_size
, offset
, &remote_errno
);
12084 /* Success, but no bytes, means end-of-file. */
12087 remote_hostio_error (remote_errno
);
12091 bytes
= fwrite (buffer
, 1, bytes
, file
.get ());
12093 perror_with_name (local_file
);
12096 discard_cleanups (close_cleanup
);
12097 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12098 remote_hostio_error (remote_errno
);
12101 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12102 do_cleanups (back_to
);
12106 remote_file_delete (const char *remote_file
, int from_tty
)
12108 int retcode
, remote_errno
;
12109 struct remote_state
*rs
= get_remote_state ();
12111 if (!rs
->remote_desc
)
12112 error (_("command can only be used with remote target"));
12114 retcode
= remote_hostio_unlink (find_target_at (process_stratum
),
12115 NULL
, remote_file
, &remote_errno
);
12117 remote_hostio_error (remote_errno
);
12120 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12124 remote_put_command (const char *args
, int from_tty
)
12127 error_no_arg (_("file to put"));
12129 gdb_argv
argv (args
);
12130 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12131 error (_("Invalid parameters to remote put"));
12133 remote_file_put (argv
[0], argv
[1], from_tty
);
12137 remote_get_command (const char *args
, int from_tty
)
12140 error_no_arg (_("file to get"));
12142 gdb_argv
argv (args
);
12143 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12144 error (_("Invalid parameters to remote get"));
12146 remote_file_get (argv
[0], argv
[1], from_tty
);
12150 remote_delete_command (const char *args
, int from_tty
)
12153 error_no_arg (_("file to delete"));
12155 gdb_argv
argv (args
);
12156 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12157 error (_("Invalid parameters to remote delete"));
12159 remote_file_delete (argv
[0], from_tty
);
12163 remote_command (const char *args
, int from_tty
)
12165 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
12169 remote_can_execute_reverse (struct target_ops
*self
)
12171 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12172 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12179 remote_supports_non_stop (struct target_ops
*self
)
12185 remote_supports_disable_randomization (struct target_ops
*self
)
12187 /* Only supported in extended mode. */
12192 remote_supports_multi_process (struct target_ops
*self
)
12194 struct remote_state
*rs
= get_remote_state ();
12196 return remote_multi_process_p (rs
);
12200 remote_supports_cond_tracepoints (void)
12202 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12206 remote_supports_cond_breakpoints (struct target_ops
*self
)
12208 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12212 remote_supports_fast_tracepoints (void)
12214 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12218 remote_supports_static_tracepoints (void)
12220 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12224 remote_supports_install_in_trace (void)
12226 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12230 remote_supports_enable_disable_tracepoint (struct target_ops
*self
)
12232 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12237 remote_supports_string_tracing (struct target_ops
*self
)
12239 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12243 remote_can_run_breakpoint_commands (struct target_ops
*self
)
12245 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12249 remote_trace_init (struct target_ops
*self
)
12251 struct remote_state
*rs
= get_remote_state ();
12254 remote_get_noisy_reply ();
12255 if (strcmp (rs
->buf
, "OK") != 0)
12256 error (_("Target does not support this command."));
12259 /* Recursive routine to walk through command list including loops, and
12260 download packets for each command. */
12263 remote_download_command_source (int num
, ULONGEST addr
,
12264 struct command_line
*cmds
)
12266 struct remote_state
*rs
= get_remote_state ();
12267 struct command_line
*cmd
;
12269 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12271 QUIT
; /* Allow user to bail out with ^C. */
12272 strcpy (rs
->buf
, "QTDPsrc:");
12273 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12274 rs
->buf
+ strlen (rs
->buf
),
12275 rs
->buf_size
- strlen (rs
->buf
));
12277 remote_get_noisy_reply ();
12278 if (strcmp (rs
->buf
, "OK"))
12279 warning (_("Target does not support source download."));
12281 if (cmd
->control_type
== while_control
12282 || cmd
->control_type
== while_stepping_control
)
12284 remote_download_command_source (num
, addr
, *cmd
->body_list
);
12286 QUIT
; /* Allow user to bail out with ^C. */
12287 strcpy (rs
->buf
, "QTDPsrc:");
12288 encode_source_string (num
, addr
, "cmd", "end",
12289 rs
->buf
+ strlen (rs
->buf
),
12290 rs
->buf_size
- strlen (rs
->buf
));
12292 remote_get_noisy_reply ();
12293 if (strcmp (rs
->buf
, "OK"))
12294 warning (_("Target does not support source download."));
12300 remote_download_tracepoint (struct target_ops
*self
, struct bp_location
*loc
)
12302 #define BUF_SIZE 2048
12306 char buf
[BUF_SIZE
];
12307 std::vector
<std::string
> tdp_actions
;
12308 std::vector
<std::string
> stepping_actions
;
12310 struct breakpoint
*b
= loc
->owner
;
12311 struct tracepoint
*t
= (struct tracepoint
*) b
;
12312 struct remote_state
*rs
= get_remote_state ();
12314 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12316 tpaddr
= loc
->address
;
12317 sprintf_vma (addrbuf
, tpaddr
);
12318 xsnprintf (buf
, BUF_SIZE
, "QTDP:%x:%s:%c:%lx:%x", b
->number
,
12319 addrbuf
, /* address */
12320 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12321 t
->step_count
, t
->pass_count
);
12322 /* Fast tracepoints are mostly handled by the target, but we can
12323 tell the target how big of an instruction block should be moved
12325 if (b
->type
== bp_fast_tracepoint
)
12327 /* Only test for support at download time; we may not know
12328 target capabilities at definition time. */
12329 if (remote_supports_fast_tracepoints ())
12331 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12333 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":F%x",
12334 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12336 /* If it passed validation at definition but fails now,
12337 something is very wrong. */
12338 internal_error (__FILE__
, __LINE__
,
12339 _("Fast tracepoint not "
12340 "valid during download"));
12343 /* Fast tracepoints are functionally identical to regular
12344 tracepoints, so don't take lack of support as a reason to
12345 give up on the trace run. */
12346 warning (_("Target does not support fast tracepoints, "
12347 "downloading %d as regular tracepoint"), b
->number
);
12349 else if (b
->type
== bp_static_tracepoint
)
12351 /* Only test for support at download time; we may not know
12352 target capabilities at definition time. */
12353 if (remote_supports_static_tracepoints ())
12355 struct static_tracepoint_marker marker
;
12357 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12358 strcat (buf
, ":S");
12360 error (_("Static tracepoint not valid during download"));
12363 /* Fast tracepoints are functionally identical to regular
12364 tracepoints, so don't take lack of support as a reason
12365 to give up on the trace run. */
12366 error (_("Target does not support static tracepoints"));
12368 /* If the tracepoint has a conditional, make it into an agent
12369 expression and append to the definition. */
12372 /* Only test support at download time, we may not know target
12373 capabilities at definition time. */
12374 if (remote_supports_cond_tracepoints ())
12376 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
.get ());
12377 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":X%x,",
12379 pkt
= buf
+ strlen (buf
);
12380 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12381 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12385 warning (_("Target does not support conditional tracepoints, "
12386 "ignoring tp %d cond"), b
->number
);
12389 if (b
->commands
|| *default_collect
)
12392 remote_get_noisy_reply ();
12393 if (strcmp (rs
->buf
, "OK"))
12394 error (_("Target does not support tracepoints."));
12396 /* do_single_steps (t); */
12397 for (auto action_it
= tdp_actions
.begin ();
12398 action_it
!= tdp_actions
.end (); action_it
++)
12400 QUIT
; /* Allow user to bail out with ^C. */
12402 bool has_more
= (action_it
!= tdp_actions
.end ()
12403 || !stepping_actions
.empty ());
12405 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%c",
12406 b
->number
, addrbuf
, /* address */
12407 action_it
->c_str (),
12408 has_more
? '-' : 0);
12410 remote_get_noisy_reply ();
12411 if (strcmp (rs
->buf
, "OK"))
12412 error (_("Error on target while setting tracepoints."));
12415 for (auto action_it
= stepping_actions
.begin ();
12416 action_it
!= stepping_actions
.end (); action_it
++)
12418 QUIT
; /* Allow user to bail out with ^C. */
12420 bool is_first
= action_it
== stepping_actions
.begin ();
12421 bool has_more
= action_it
!= stepping_actions
.end ();
12423 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%s%s",
12424 b
->number
, addrbuf
, /* address */
12425 is_first
? "S" : "",
12426 action_it
->c_str (),
12427 has_more
? "-" : "");
12429 remote_get_noisy_reply ();
12430 if (strcmp (rs
->buf
, "OK"))
12431 error (_("Error on target while setting tracepoints."));
12434 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
12436 if (b
->location
!= NULL
)
12438 strcpy (buf
, "QTDPsrc:");
12439 encode_source_string (b
->number
, loc
->address
, "at",
12440 event_location_to_string (b
->location
.get ()),
12441 buf
+ strlen (buf
), 2048 - strlen (buf
));
12443 remote_get_noisy_reply ();
12444 if (strcmp (rs
->buf
, "OK"))
12445 warning (_("Target does not support source download."));
12447 if (b
->cond_string
)
12449 strcpy (buf
, "QTDPsrc:");
12450 encode_source_string (b
->number
, loc
->address
,
12451 "cond", b
->cond_string
, buf
+ strlen (buf
),
12452 2048 - strlen (buf
));
12454 remote_get_noisy_reply ();
12455 if (strcmp (rs
->buf
, "OK"))
12456 warning (_("Target does not support source download."));
12458 remote_download_command_source (b
->number
, loc
->address
,
12459 breakpoint_commands (b
));
12464 remote_can_download_tracepoint (struct target_ops
*self
)
12466 struct remote_state
*rs
= get_remote_state ();
12467 struct trace_status
*ts
;
12470 /* Don't try to install tracepoints until we've relocated our
12471 symbols, and fetched and merged the target's tracepoint list with
12473 if (rs
->starting_up
)
12476 ts
= current_trace_status ();
12477 status
= remote_get_trace_status (self
, ts
);
12479 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
12482 /* If we are in a tracing experiment, but remote stub doesn't support
12483 installing tracepoint in trace, we have to return. */
12484 if (!remote_supports_install_in_trace ())
12492 remote_download_trace_state_variable (struct target_ops
*self
,
12493 struct trace_state_variable
*tsv
)
12495 struct remote_state
*rs
= get_remote_state ();
12498 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12499 tsv
->number
, phex ((ULONGEST
) tsv
->initial_value
, 8),
12501 p
= rs
->buf
+ strlen (rs
->buf
);
12502 if ((p
- rs
->buf
) + strlen (tsv
->name
) * 2 >= get_remote_packet_size ())
12503 error (_("Trace state variable name too long for tsv definition packet"));
12504 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
->name
), p
, strlen (tsv
->name
));
12507 remote_get_noisy_reply ();
12508 if (*rs
->buf
== '\0')
12509 error (_("Target does not support this command."));
12510 if (strcmp (rs
->buf
, "OK") != 0)
12511 error (_("Error on target while downloading trace state variable."));
12515 remote_enable_tracepoint (struct target_ops
*self
,
12516 struct bp_location
*location
)
12518 struct remote_state
*rs
= get_remote_state ();
12521 sprintf_vma (addr_buf
, location
->address
);
12522 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTEnable:%x:%s",
12523 location
->owner
->number
, addr_buf
);
12525 remote_get_noisy_reply ();
12526 if (*rs
->buf
== '\0')
12527 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12528 if (strcmp (rs
->buf
, "OK") != 0)
12529 error (_("Error on target while enabling tracepoint."));
12533 remote_disable_tracepoint (struct target_ops
*self
,
12534 struct bp_location
*location
)
12536 struct remote_state
*rs
= get_remote_state ();
12539 sprintf_vma (addr_buf
, location
->address
);
12540 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisable:%x:%s",
12541 location
->owner
->number
, addr_buf
);
12543 remote_get_noisy_reply ();
12544 if (*rs
->buf
== '\0')
12545 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12546 if (strcmp (rs
->buf
, "OK") != 0)
12547 error (_("Error on target while disabling tracepoint."));
12551 remote_trace_set_readonly_regions (struct target_ops
*self
)
12555 bfd_size_type size
;
12561 return; /* No information to give. */
12563 struct remote_state
*rs
= get_remote_state ();
12565 strcpy (rs
->buf
, "QTro");
12566 offset
= strlen (rs
->buf
);
12567 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
12569 char tmp1
[40], tmp2
[40];
12572 if ((s
->flags
& SEC_LOAD
) == 0 ||
12573 /* (s->flags & SEC_CODE) == 0 || */
12574 (s
->flags
& SEC_READONLY
) == 0)
12578 vma
= bfd_get_section_vma (abfd
, s
);
12579 size
= bfd_get_section_size (s
);
12580 sprintf_vma (tmp1
, vma
);
12581 sprintf_vma (tmp2
, vma
+ size
);
12582 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
12583 if (offset
+ sec_length
+ 1 > rs
->buf_size
)
12585 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
12587 Too many sections for read-only sections definition packet."));
12590 xsnprintf (rs
->buf
+ offset
, rs
->buf_size
- offset
, ":%s,%s",
12592 offset
+= sec_length
;
12597 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12602 remote_trace_start (struct target_ops
*self
)
12604 struct remote_state
*rs
= get_remote_state ();
12606 putpkt ("QTStart");
12607 remote_get_noisy_reply ();
12608 if (*rs
->buf
== '\0')
12609 error (_("Target does not support this command."));
12610 if (strcmp (rs
->buf
, "OK") != 0)
12611 error (_("Bogus reply from target: %s"), rs
->buf
);
12615 remote_get_trace_status (struct target_ops
*self
, struct trace_status
*ts
)
12617 /* Initialize it just to avoid a GCC false warning. */
12619 /* FIXME we need to get register block size some other way. */
12620 extern int trace_regblock_size
;
12621 enum packet_result result
;
12622 struct remote_state
*rs
= get_remote_state ();
12624 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
12627 trace_regblock_size
12628 = get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
12630 putpkt ("qTStatus");
12634 p
= remote_get_noisy_reply ();
12636 CATCH (ex
, RETURN_MASK_ERROR
)
12638 if (ex
.error
!= TARGET_CLOSE_ERROR
)
12640 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
12643 throw_exception (ex
);
12647 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
12649 /* If the remote target doesn't do tracing, flag it. */
12650 if (result
== PACKET_UNKNOWN
)
12653 /* We're working with a live target. */
12654 ts
->filename
= NULL
;
12657 error (_("Bogus trace status reply from target: %s"), rs
->buf
);
12659 /* Function 'parse_trace_status' sets default value of each field of
12660 'ts' at first, so we don't have to do it here. */
12661 parse_trace_status (p
, ts
);
12663 return ts
->running
;
12667 remote_get_tracepoint_status (struct target_ops
*self
, struct breakpoint
*bp
,
12668 struct uploaded_tp
*utp
)
12670 struct remote_state
*rs
= get_remote_state ();
12672 struct bp_location
*loc
;
12673 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
12674 size_t size
= get_remote_packet_size ();
12679 tp
->traceframe_usage
= 0;
12680 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
12682 /* If the tracepoint was never downloaded, don't go asking for
12684 if (tp
->number_on_target
== 0)
12686 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", tp
->number_on_target
,
12687 phex_nz (loc
->address
, 0));
12689 reply
= remote_get_noisy_reply ();
12690 if (reply
&& *reply
)
12693 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12699 utp
->hit_count
= 0;
12700 utp
->traceframe_usage
= 0;
12701 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", utp
->number
,
12702 phex_nz (utp
->addr
, 0));
12704 reply
= remote_get_noisy_reply ();
12705 if (reply
&& *reply
)
12708 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12714 remote_trace_stop (struct target_ops
*self
)
12716 struct remote_state
*rs
= get_remote_state ();
12719 remote_get_noisy_reply ();
12720 if (*rs
->buf
== '\0')
12721 error (_("Target does not support this command."));
12722 if (strcmp (rs
->buf
, "OK") != 0)
12723 error (_("Bogus reply from target: %s"), rs
->buf
);
12727 remote_trace_find (struct target_ops
*self
,
12728 enum trace_find_type type
, int num
,
12729 CORE_ADDR addr1
, CORE_ADDR addr2
,
12732 struct remote_state
*rs
= get_remote_state ();
12733 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12735 int target_frameno
= -1, target_tracept
= -1;
12737 /* Lookups other than by absolute frame number depend on the current
12738 trace selected, so make sure it is correct on the remote end
12740 if (type
!= tfind_number
)
12741 set_remote_traceframe ();
12744 strcpy (p
, "QTFrame:");
12745 p
= strchr (p
, '\0');
12749 xsnprintf (p
, endbuf
- p
, "%x", num
);
12752 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
12755 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
12758 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
12759 phex_nz (addr2
, 0));
12761 case tfind_outside
:
12762 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
12763 phex_nz (addr2
, 0));
12766 error (_("Unknown trace find type %d"), type
);
12770 reply
= remote_get_noisy_reply ();
12771 if (*reply
== '\0')
12772 error (_("Target does not support this command."));
12774 while (reply
&& *reply
)
12779 target_frameno
= (int) strtol (p
, &reply
, 16);
12781 error (_("Unable to parse trace frame number"));
12782 /* Don't update our remote traceframe number cache on failure
12783 to select a remote traceframe. */
12784 if (target_frameno
== -1)
12789 target_tracept
= (int) strtol (p
, &reply
, 16);
12791 error (_("Unable to parse tracepoint number"));
12793 case 'O': /* "OK"? */
12794 if (reply
[1] == 'K' && reply
[2] == '\0')
12797 error (_("Bogus reply from target: %s"), reply
);
12800 error (_("Bogus reply from target: %s"), reply
);
12803 *tpp
= target_tracept
;
12805 rs
->remote_traceframe_number
= target_frameno
;
12806 return target_frameno
;
12810 remote_get_trace_state_variable_value (struct target_ops
*self
,
12811 int tsvnum
, LONGEST
*val
)
12813 struct remote_state
*rs
= get_remote_state ();
12817 set_remote_traceframe ();
12819 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTV:%x", tsvnum
);
12821 reply
= remote_get_noisy_reply ();
12822 if (reply
&& *reply
)
12826 unpack_varlen_hex (reply
+ 1, &uval
);
12827 *val
= (LONGEST
) uval
;
12835 remote_save_trace_data (struct target_ops
*self
, const char *filename
)
12837 struct remote_state
*rs
= get_remote_state ();
12841 strcpy (p
, "QTSave:");
12843 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
12844 error (_("Remote file name too long for trace save packet"));
12845 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
12848 reply
= remote_get_noisy_reply ();
12849 if (*reply
== '\0')
12850 error (_("Target does not support this command."));
12851 if (strcmp (reply
, "OK") != 0)
12852 error (_("Bogus reply from target: %s"), reply
);
12856 /* This is basically a memory transfer, but needs to be its own packet
12857 because we don't know how the target actually organizes its trace
12858 memory, plus we want to be able to ask for as much as possible, but
12859 not be unhappy if we don't get as much as we ask for. */
12862 remote_get_raw_trace_data (struct target_ops
*self
,
12863 gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
12865 struct remote_state
*rs
= get_remote_state ();
12871 strcpy (p
, "qTBuffer:");
12873 p
+= hexnumstr (p
, offset
);
12875 p
+= hexnumstr (p
, len
);
12879 reply
= remote_get_noisy_reply ();
12880 if (reply
&& *reply
)
12882 /* 'l' by itself means we're at the end of the buffer and
12883 there is nothing more to get. */
12887 /* Convert the reply into binary. Limit the number of bytes to
12888 convert according to our passed-in buffer size, rather than
12889 what was returned in the packet; if the target is
12890 unexpectedly generous and gives us a bigger reply than we
12891 asked for, we don't want to crash. */
12892 rslt
= hex2bin (reply
, buf
, len
);
12896 /* Something went wrong, flag as an error. */
12901 remote_set_disconnected_tracing (struct target_ops
*self
, int val
)
12903 struct remote_state
*rs
= get_remote_state ();
12905 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
12909 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisconnected:%x", val
);
12911 reply
= remote_get_noisy_reply ();
12912 if (*reply
== '\0')
12913 error (_("Target does not support this command."));
12914 if (strcmp (reply
, "OK") != 0)
12915 error (_("Bogus reply from target: %s"), reply
);
12918 warning (_("Target does not support disconnected tracing."));
12922 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
12924 struct thread_info
*info
= find_thread_ptid (ptid
);
12926 if (info
&& info
->priv
)
12927 return info
->priv
->core
;
12932 remote_set_circular_trace_buffer (struct target_ops
*self
, int val
)
12934 struct remote_state
*rs
= get_remote_state ();
12937 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTBuffer:circular:%x", val
);
12939 reply
= remote_get_noisy_reply ();
12940 if (*reply
== '\0')
12941 error (_("Target does not support this command."));
12942 if (strcmp (reply
, "OK") != 0)
12943 error (_("Bogus reply from target: %s"), reply
);
12946 static traceframe_info_up
12947 remote_traceframe_info (struct target_ops
*self
)
12949 gdb::unique_xmalloc_ptr
<char> text
12950 = target_read_stralloc (¤t_target
, TARGET_OBJECT_TRACEFRAME_INFO
,
12953 return parse_traceframe_info (text
.get ());
12958 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12959 instruction on which a fast tracepoint may be placed. Returns -1
12960 if the packet is not supported, and 0 if the minimum instruction
12961 length is unknown. */
12964 remote_get_min_fast_tracepoint_insn_len (struct target_ops
*self
)
12966 struct remote_state
*rs
= get_remote_state ();
12969 /* If we're not debugging a process yet, the IPA can't be
12971 if (!target_has_execution
)
12974 /* Make sure the remote is pointing at the right process. */
12975 set_general_process ();
12977 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTMinFTPILen");
12979 reply
= remote_get_noisy_reply ();
12980 if (*reply
== '\0')
12984 ULONGEST min_insn_len
;
12986 unpack_varlen_hex (reply
, &min_insn_len
);
12988 return (int) min_insn_len
;
12993 remote_set_trace_buffer_size (struct target_ops
*self
, LONGEST val
)
12995 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
12997 struct remote_state
*rs
= get_remote_state ();
12998 char *buf
= rs
->buf
;
12999 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13000 enum packet_result result
;
13002 gdb_assert (val
>= 0 || val
== -1);
13003 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13004 /* Send -1 as literal "-1" to avoid host size dependency. */
13008 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13011 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13014 remote_get_noisy_reply ();
13015 result
= packet_ok (rs
->buf
,
13016 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13018 if (result
!= PACKET_OK
)
13019 warning (_("Bogus reply from target: %s"), rs
->buf
);
13024 remote_set_trace_notes (struct target_ops
*self
,
13025 const char *user
, const char *notes
,
13026 const char *stop_notes
)
13028 struct remote_state
*rs
= get_remote_state ();
13030 char *buf
= rs
->buf
;
13031 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13034 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13037 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13038 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13044 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13045 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13051 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13052 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13056 /* Ensure the buffer is terminated. */
13060 reply
= remote_get_noisy_reply ();
13061 if (*reply
== '\0')
13064 if (strcmp (reply
, "OK") != 0)
13065 error (_("Bogus reply from target: %s"), reply
);
13071 remote_use_agent (struct target_ops
*self
, int use
)
13073 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13075 struct remote_state
*rs
= get_remote_state ();
13077 /* If the stub supports QAgent. */
13078 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAgent:%d", use
);
13080 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13082 if (strcmp (rs
->buf
, "OK") == 0)
13093 remote_can_use_agent (struct target_ops
*self
)
13095 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13098 struct btrace_target_info
13100 /* The ptid of the traced thread. */
13103 /* The obtained branch trace configuration. */
13104 struct btrace_config conf
;
13107 /* Reset our idea of our target's btrace configuration. */
13110 remote_btrace_reset (void)
13112 struct remote_state
*rs
= get_remote_state ();
13114 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13117 /* Check whether the target supports branch tracing. */
13120 remote_supports_btrace (struct target_ops
*self
, enum btrace_format format
)
13122 if (packet_support (PACKET_Qbtrace_off
) != PACKET_ENABLE
)
13124 if (packet_support (PACKET_qXfer_btrace
) != PACKET_ENABLE
)
13129 case BTRACE_FORMAT_NONE
:
13132 case BTRACE_FORMAT_BTS
:
13133 return (packet_support (PACKET_Qbtrace_bts
) == PACKET_ENABLE
);
13135 case BTRACE_FORMAT_PT
:
13136 /* The trace is decoded on the host. Even if our target supports it,
13137 we still need to have libipt to decode the trace. */
13138 #if defined (HAVE_LIBIPT)
13139 return (packet_support (PACKET_Qbtrace_pt
) == PACKET_ENABLE
);
13140 #else /* !defined (HAVE_LIBIPT) */
13142 #endif /* !defined (HAVE_LIBIPT) */
13145 internal_error (__FILE__
, __LINE__
, _("Unknown branch trace format"));
13148 /* Synchronize the configuration with the target. */
13151 btrace_sync_conf (const struct btrace_config
*conf
)
13153 struct packet_config
*packet
;
13154 struct remote_state
*rs
;
13155 char *buf
, *pos
, *endbuf
;
13157 rs
= get_remote_state ();
13159 endbuf
= buf
+ get_remote_packet_size ();
13161 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13162 if (packet_config_support (packet
) == PACKET_ENABLE
13163 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13166 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13170 getpkt (&buf
, &rs
->buf_size
, 0);
13172 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13174 if (buf
[0] == 'E' && buf
[1] == '.')
13175 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13177 error (_("Failed to configure the BTS buffer size."));
13180 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13183 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13184 if (packet_config_support (packet
) == PACKET_ENABLE
13185 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13188 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13192 getpkt (&buf
, &rs
->buf_size
, 0);
13194 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13196 if (buf
[0] == 'E' && buf
[1] == '.')
13197 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13199 error (_("Failed to configure the trace buffer size."));
13202 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13206 /* Read the current thread's btrace configuration from the target and
13207 store it into CONF. */
13210 btrace_read_config (struct btrace_config
*conf
)
13212 gdb::unique_xmalloc_ptr
<char> xml
13213 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE_CONF
, "");
13215 parse_xml_btrace_conf (conf
, xml
.get ());
13218 /* Maybe reopen target btrace. */
13221 remote_btrace_maybe_reopen (void)
13223 struct remote_state
*rs
= get_remote_state ();
13224 struct thread_info
*tp
;
13225 int btrace_target_pushed
= 0;
13228 scoped_restore_current_thread restore_thread
;
13230 ALL_NON_EXITED_THREADS (tp
)
13232 set_general_thread (tp
->ptid
);
13234 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13235 btrace_read_config (&rs
->btrace_config
);
13237 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13240 #if !defined (HAVE_LIBIPT)
13241 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13246 warning (_("GDB does not support Intel Processor Trace. "
13247 "\"record\" will not work in this session."));
13252 #endif /* !defined (HAVE_LIBIPT) */
13254 /* Push target, once, but before anything else happens. This way our
13255 changes to the threads will be cleaned up by unpushing the target
13256 in case btrace_read_config () throws. */
13257 if (!btrace_target_pushed
)
13259 btrace_target_pushed
= 1;
13260 record_btrace_push_target ();
13261 printf_filtered (_("Target is recording using %s.\n"),
13262 btrace_format_string (rs
->btrace_config
.format
));
13265 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13266 tp
->btrace
.target
->ptid
= tp
->ptid
;
13267 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13271 /* Enable branch tracing. */
13273 static struct btrace_target_info
*
13274 remote_enable_btrace (struct target_ops
*self
, ptid_t ptid
,
13275 const struct btrace_config
*conf
)
13277 struct btrace_target_info
*tinfo
= NULL
;
13278 struct packet_config
*packet
= NULL
;
13279 struct remote_state
*rs
= get_remote_state ();
13280 char *buf
= rs
->buf
;
13281 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13283 switch (conf
->format
)
13285 case BTRACE_FORMAT_BTS
:
13286 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13289 case BTRACE_FORMAT_PT
:
13290 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13294 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13295 error (_("Target does not support branch tracing."));
13297 btrace_sync_conf (conf
);
13299 set_general_thread (ptid
);
13301 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13303 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13305 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13307 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13308 error (_("Could not enable branch tracing for %s: %s"),
13309 target_pid_to_str (ptid
), rs
->buf
+ 2);
13311 error (_("Could not enable branch tracing for %s."),
13312 target_pid_to_str (ptid
));
13315 tinfo
= XCNEW (struct btrace_target_info
);
13316 tinfo
->ptid
= ptid
;
13318 /* If we fail to read the configuration, we lose some information, but the
13319 tracing itself is not impacted. */
13322 btrace_read_config (&tinfo
->conf
);
13324 CATCH (err
, RETURN_MASK_ERROR
)
13326 if (err
.message
!= NULL
)
13327 warning ("%s", err
.message
);
13334 /* Disable branch tracing. */
13337 remote_disable_btrace (struct target_ops
*self
,
13338 struct btrace_target_info
*tinfo
)
13340 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13341 struct remote_state
*rs
= get_remote_state ();
13342 char *buf
= rs
->buf
;
13343 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13345 if (packet_config_support (packet
) != PACKET_ENABLE
)
13346 error (_("Target does not support branch tracing."));
13348 set_general_thread (tinfo
->ptid
);
13350 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13352 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13354 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13356 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13357 error (_("Could not disable branch tracing for %s: %s"),
13358 target_pid_to_str (tinfo
->ptid
), rs
->buf
+ 2);
13360 error (_("Could not disable branch tracing for %s."),
13361 target_pid_to_str (tinfo
->ptid
));
13367 /* Teardown branch tracing. */
13370 remote_teardown_btrace (struct target_ops
*self
,
13371 struct btrace_target_info
*tinfo
)
13373 /* We must not talk to the target during teardown. */
13377 /* Read the branch trace. */
13379 static enum btrace_error
13380 remote_read_btrace (struct target_ops
*self
,
13381 struct btrace_data
*btrace
,
13382 struct btrace_target_info
*tinfo
,
13383 enum btrace_read_type type
)
13385 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13388 if (packet_config_support (packet
) != PACKET_ENABLE
)
13389 error (_("Target does not support branch tracing."));
13391 #if !defined(HAVE_LIBEXPAT)
13392 error (_("Cannot process branch tracing result. XML parsing not supported."));
13397 case BTRACE_READ_ALL
:
13400 case BTRACE_READ_NEW
:
13403 case BTRACE_READ_DELTA
:
13407 internal_error (__FILE__
, __LINE__
,
13408 _("Bad branch tracing read type: %u."),
13409 (unsigned int) type
);
13412 gdb::unique_xmalloc_ptr
<char> xml
13413 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE
, annex
);
13415 return BTRACE_ERR_UNKNOWN
;
13417 parse_xml_btrace (btrace
, xml
.get ());
13419 return BTRACE_ERR_NONE
;
13422 static const struct btrace_config
*
13423 remote_btrace_conf (struct target_ops
*self
,
13424 const struct btrace_target_info
*tinfo
)
13426 return &tinfo
->conf
;
13430 remote_augmented_libraries_svr4_read (struct target_ops
*self
)
13432 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
13436 /* Implementation of to_load. */
13439 remote_load (struct target_ops
*self
, const char *name
, int from_tty
)
13441 generic_load (name
, from_tty
);
13444 /* Accepts an integer PID; returns a string representing a file that
13445 can be opened on the remote side to get the symbols for the child
13446 process. Returns NULL if the operation is not supported. */
13449 remote_pid_to_exec_file (struct target_ops
*self
, int pid
)
13451 static gdb::unique_xmalloc_ptr
<char> filename
;
13452 struct inferior
*inf
;
13453 char *annex
= NULL
;
13455 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
13458 inf
= find_inferior_pid (pid
);
13460 internal_error (__FILE__
, __LINE__
,
13461 _("not currently attached to process %d"), pid
);
13463 if (!inf
->fake_pid_p
)
13465 const int annex_size
= 9;
13467 annex
= (char *) alloca (annex_size
);
13468 xsnprintf (annex
, annex_size
, "%x", pid
);
13471 filename
= target_read_stralloc (¤t_target
,
13472 TARGET_OBJECT_EXEC_FILE
, annex
);
13474 return filename
.get ();
13477 /* Implement the to_can_do_single_step target_ops method. */
13480 remote_can_do_single_step (struct target_ops
*ops
)
13482 /* We can only tell whether target supports single step or not by
13483 supported s and S vCont actions if the stub supports vContSupported
13484 feature. If the stub doesn't support vContSupported feature,
13485 we have conservatively to think target doesn't supports single
13487 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
13489 struct remote_state
*rs
= get_remote_state ();
13491 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13492 remote_vcont_probe (rs
);
13494 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
13500 /* Implementation of the to_execution_direction method for the remote
13503 static enum exec_direction_kind
13504 remote_execution_direction (struct target_ops
*self
)
13506 struct remote_state
*rs
= get_remote_state ();
13508 return rs
->last_resume_exec_dir
;
13511 /* Return pointer to the thread_info struct which corresponds to
13512 THREAD_HANDLE (having length HANDLE_LEN). */
13514 static struct thread_info
*
13515 remote_thread_handle_to_thread_info (struct target_ops
*ops
,
13516 const gdb_byte
*thread_handle
,
13518 struct inferior
*inf
)
13520 struct thread_info
*tp
;
13522 ALL_NON_EXITED_THREADS (tp
)
13524 struct private_thread_info
*priv
= get_private_info_thread (tp
);
13526 if (tp
->inf
== inf
&& priv
!= NULL
)
13528 if (handle_len
!= priv
->thread_handle
->size ())
13529 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
13530 handle_len
, priv
->thread_handle
->size ());
13531 if (memcmp (thread_handle
, priv
->thread_handle
->data (),
13541 init_remote_ops (void)
13543 remote_ops
.to_shortname
= "remote";
13544 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
13545 remote_ops
.to_doc
=
13546 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13547 Specify the serial device it is connected to\n\
13548 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13549 remote_ops
.to_open
= remote_open
;
13550 remote_ops
.to_close
= remote_close
;
13551 remote_ops
.to_detach
= remote_detach
;
13552 remote_ops
.to_disconnect
= remote_disconnect
;
13553 remote_ops
.to_resume
= remote_resume
;
13554 remote_ops
.to_commit_resume
= remote_commit_resume
;
13555 remote_ops
.to_wait
= remote_wait
;
13556 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
13557 remote_ops
.to_store_registers
= remote_store_registers
;
13558 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
13559 remote_ops
.to_files_info
= remote_files_info
;
13560 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
13561 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
13562 remote_ops
.to_stopped_by_sw_breakpoint
= remote_stopped_by_sw_breakpoint
;
13563 remote_ops
.to_supports_stopped_by_sw_breakpoint
= remote_supports_stopped_by_sw_breakpoint
;
13564 remote_ops
.to_stopped_by_hw_breakpoint
= remote_stopped_by_hw_breakpoint
;
13565 remote_ops
.to_supports_stopped_by_hw_breakpoint
= remote_supports_stopped_by_hw_breakpoint
;
13566 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
13567 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
13568 remote_ops
.to_watchpoint_addr_within_range
=
13569 remote_watchpoint_addr_within_range
;
13570 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
13571 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
13572 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
13573 remote_ops
.to_region_ok_for_hw_watchpoint
13574 = remote_region_ok_for_hw_watchpoint
;
13575 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
13576 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
13577 remote_ops
.to_kill
= remote_kill
;
13578 remote_ops
.to_load
= remote_load
;
13579 remote_ops
.to_mourn_inferior
= remote_mourn
;
13580 remote_ops
.to_pass_signals
= remote_pass_signals
;
13581 remote_ops
.to_set_syscall_catchpoint
= remote_set_syscall_catchpoint
;
13582 remote_ops
.to_program_signals
= remote_program_signals
;
13583 remote_ops
.to_thread_alive
= remote_thread_alive
;
13584 remote_ops
.to_thread_name
= remote_thread_name
;
13585 remote_ops
.to_update_thread_list
= remote_update_thread_list
;
13586 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
13587 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
13588 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
13589 remote_ops
.to_stop
= remote_stop
;
13590 remote_ops
.to_interrupt
= remote_interrupt
;
13591 remote_ops
.to_pass_ctrlc
= remote_pass_ctrlc
;
13592 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
13593 remote_ops
.to_get_memory_xfer_limit
= remote_get_memory_xfer_limit
;
13594 remote_ops
.to_rcmd
= remote_rcmd
;
13595 remote_ops
.to_pid_to_exec_file
= remote_pid_to_exec_file
;
13596 remote_ops
.to_log_command
= serial_log_command
;
13597 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
13598 remote_ops
.to_stratum
= process_stratum
;
13599 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
13600 remote_ops
.to_has_memory
= default_child_has_memory
;
13601 remote_ops
.to_has_stack
= default_child_has_stack
;
13602 remote_ops
.to_has_registers
= default_child_has_registers
;
13603 remote_ops
.to_has_execution
= default_child_has_execution
;
13604 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
13605 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
13606 remote_ops
.to_magic
= OPS_MAGIC
;
13607 remote_ops
.to_memory_map
= remote_memory_map
;
13608 remote_ops
.to_flash_erase
= remote_flash_erase
;
13609 remote_ops
.to_flash_done
= remote_flash_done
;
13610 remote_ops
.to_read_description
= remote_read_description
;
13611 remote_ops
.to_search_memory
= remote_search_memory
;
13612 remote_ops
.to_can_async_p
= remote_can_async_p
;
13613 remote_ops
.to_is_async_p
= remote_is_async_p
;
13614 remote_ops
.to_async
= remote_async
;
13615 remote_ops
.to_thread_events
= remote_thread_events
;
13616 remote_ops
.to_can_do_single_step
= remote_can_do_single_step
;
13617 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
13618 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
13619 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
13620 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
13621 remote_ops
.to_supports_disable_randomization
13622 = remote_supports_disable_randomization
;
13623 remote_ops
.to_filesystem_is_local
= remote_filesystem_is_local
;
13624 remote_ops
.to_fileio_open
= remote_hostio_open
;
13625 remote_ops
.to_fileio_pwrite
= remote_hostio_pwrite
;
13626 remote_ops
.to_fileio_pread
= remote_hostio_pread
;
13627 remote_ops
.to_fileio_fstat
= remote_hostio_fstat
;
13628 remote_ops
.to_fileio_close
= remote_hostio_close
;
13629 remote_ops
.to_fileio_unlink
= remote_hostio_unlink
;
13630 remote_ops
.to_fileio_readlink
= remote_hostio_readlink
;
13631 remote_ops
.to_supports_enable_disable_tracepoint
= remote_supports_enable_disable_tracepoint
;
13632 remote_ops
.to_supports_string_tracing
= remote_supports_string_tracing
;
13633 remote_ops
.to_supports_evaluation_of_breakpoint_conditions
= remote_supports_cond_breakpoints
;
13634 remote_ops
.to_can_run_breakpoint_commands
= remote_can_run_breakpoint_commands
;
13635 remote_ops
.to_trace_init
= remote_trace_init
;
13636 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
13637 remote_ops
.to_can_download_tracepoint
= remote_can_download_tracepoint
;
13638 remote_ops
.to_download_trace_state_variable
13639 = remote_download_trace_state_variable
;
13640 remote_ops
.to_enable_tracepoint
= remote_enable_tracepoint
;
13641 remote_ops
.to_disable_tracepoint
= remote_disable_tracepoint
;
13642 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
13643 remote_ops
.to_trace_start
= remote_trace_start
;
13644 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
13645 remote_ops
.to_get_tracepoint_status
= remote_get_tracepoint_status
;
13646 remote_ops
.to_trace_stop
= remote_trace_stop
;
13647 remote_ops
.to_trace_find
= remote_trace_find
;
13648 remote_ops
.to_get_trace_state_variable_value
13649 = remote_get_trace_state_variable_value
;
13650 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
13651 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
13652 remote_ops
.to_upload_trace_state_variables
13653 = remote_upload_trace_state_variables
;
13654 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
13655 remote_ops
.to_get_min_fast_tracepoint_insn_len
= remote_get_min_fast_tracepoint_insn_len
;
13656 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
13657 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
13658 remote_ops
.to_set_trace_buffer_size
= remote_set_trace_buffer_size
;
13659 remote_ops
.to_set_trace_notes
= remote_set_trace_notes
;
13660 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
13661 remote_ops
.to_verify_memory
= remote_verify_memory
;
13662 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
13663 remote_ops
.to_set_permissions
= remote_set_permissions
;
13664 remote_ops
.to_static_tracepoint_marker_at
13665 = remote_static_tracepoint_marker_at
;
13666 remote_ops
.to_static_tracepoint_markers_by_strid
13667 = remote_static_tracepoint_markers_by_strid
;
13668 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
13669 remote_ops
.to_use_agent
= remote_use_agent
;
13670 remote_ops
.to_can_use_agent
= remote_can_use_agent
;
13671 remote_ops
.to_supports_btrace
= remote_supports_btrace
;
13672 remote_ops
.to_enable_btrace
= remote_enable_btrace
;
13673 remote_ops
.to_disable_btrace
= remote_disable_btrace
;
13674 remote_ops
.to_teardown_btrace
= remote_teardown_btrace
;
13675 remote_ops
.to_read_btrace
= remote_read_btrace
;
13676 remote_ops
.to_btrace_conf
= remote_btrace_conf
;
13677 remote_ops
.to_augmented_libraries_svr4_read
=
13678 remote_augmented_libraries_svr4_read
;
13679 remote_ops
.to_follow_fork
= remote_follow_fork
;
13680 remote_ops
.to_follow_exec
= remote_follow_exec
;
13681 remote_ops
.to_insert_fork_catchpoint
= remote_insert_fork_catchpoint
;
13682 remote_ops
.to_remove_fork_catchpoint
= remote_remove_fork_catchpoint
;
13683 remote_ops
.to_insert_vfork_catchpoint
= remote_insert_vfork_catchpoint
;
13684 remote_ops
.to_remove_vfork_catchpoint
= remote_remove_vfork_catchpoint
;
13685 remote_ops
.to_insert_exec_catchpoint
= remote_insert_exec_catchpoint
;
13686 remote_ops
.to_remove_exec_catchpoint
= remote_remove_exec_catchpoint
;
13687 remote_ops
.to_execution_direction
= remote_execution_direction
;
13688 remote_ops
.to_thread_handle_to_thread_info
=
13689 remote_thread_handle_to_thread_info
;
13692 /* Set up the extended remote vector by making a copy of the standard
13693 remote vector and adding to it. */
13696 init_extended_remote_ops (void)
13698 extended_remote_ops
= remote_ops
;
13700 extended_remote_ops
.to_shortname
= "extended-remote";
13701 extended_remote_ops
.to_longname
=
13702 "Extended remote serial target in gdb-specific protocol";
13703 extended_remote_ops
.to_doc
=
13704 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13705 Specify the serial device it is connected to (e.g. /dev/ttya).";
13706 extended_remote_ops
.to_open
= extended_remote_open
;
13707 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
13708 extended_remote_ops
.to_detach
= extended_remote_detach
;
13709 extended_remote_ops
.to_attach
= extended_remote_attach
;
13710 extended_remote_ops
.to_post_attach
= extended_remote_post_attach
;
13711 extended_remote_ops
.to_supports_disable_randomization
13712 = extended_remote_supports_disable_randomization
;
13716 remote_can_async_p (struct target_ops
*ops
)
13718 struct remote_state
*rs
= get_remote_state ();
13720 /* We don't go async if the user has explicitly prevented it with the
13721 "maint set target-async" command. */
13722 if (!target_async_permitted
)
13725 /* We're async whenever the serial device is. */
13726 return serial_can_async_p (rs
->remote_desc
);
13730 remote_is_async_p (struct target_ops
*ops
)
13732 struct remote_state
*rs
= get_remote_state ();
13734 if (!target_async_permitted
)
13735 /* We only enable async when the user specifically asks for it. */
13738 /* We're async whenever the serial device is. */
13739 return serial_is_async_p (rs
->remote_desc
);
13742 /* Pass the SERIAL event on and up to the client. One day this code
13743 will be able to delay notifying the client of an event until the
13744 point where an entire packet has been received. */
13746 static serial_event_ftype remote_async_serial_handler
;
13749 remote_async_serial_handler (struct serial
*scb
, void *context
)
13751 /* Don't propogate error information up to the client. Instead let
13752 the client find out about the error by querying the target. */
13753 inferior_event_handler (INF_REG_EVENT
, NULL
);
13757 remote_async_inferior_event_handler (gdb_client_data data
)
13759 inferior_event_handler (INF_REG_EVENT
, NULL
);
13763 remote_async (struct target_ops
*ops
, int enable
)
13765 struct remote_state
*rs
= get_remote_state ();
13769 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
13771 /* If there are pending events in the stop reply queue tell the
13772 event loop to process them. */
13773 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
13774 mark_async_event_handler (remote_async_inferior_event_token
);
13775 /* For simplicity, below we clear the pending events token
13776 without remembering whether it is marked, so here we always
13777 mark it. If there's actually no pending notification to
13778 process, this ends up being a no-op (other than a spurious
13779 event-loop wakeup). */
13780 if (target_is_non_stop_p ())
13781 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13785 serial_async (rs
->remote_desc
, NULL
, NULL
);
13786 /* If the core is disabling async, it doesn't want to be
13787 disturbed with target events. Clear all async event sources
13789 clear_async_event_handler (remote_async_inferior_event_token
);
13790 if (target_is_non_stop_p ())
13791 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13795 /* Implementation of the to_thread_events method. */
13798 remote_thread_events (struct target_ops
*ops
, int enable
)
13800 struct remote_state
*rs
= get_remote_state ();
13801 size_t size
= get_remote_packet_size ();
13803 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
13806 xsnprintf (rs
->buf
, size
, "QThreadEvents:%x", enable
? 1 : 0);
13808 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13810 switch (packet_ok (rs
->buf
,
13811 &remote_protocol_packets
[PACKET_QThreadEvents
]))
13814 if (strcmp (rs
->buf
, "OK") != 0)
13815 error (_("Remote refused setting thread events: %s"), rs
->buf
);
13818 warning (_("Remote failure reply: %s"), rs
->buf
);
13820 case PACKET_UNKNOWN
:
13826 set_remote_cmd (const char *args
, int from_tty
)
13828 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
13832 show_remote_cmd (const char *args
, int from_tty
)
13834 /* We can't just use cmd_show_list here, because we want to skip
13835 the redundant "show remote Z-packet" and the legacy aliases. */
13836 struct cmd_list_element
*list
= remote_show_cmdlist
;
13837 struct ui_out
*uiout
= current_uiout
;
13839 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
13840 for (; list
!= NULL
; list
= list
->next
)
13841 if (strcmp (list
->name
, "Z-packet") == 0)
13843 else if (list
->type
== not_set_cmd
)
13844 /* Alias commands are exactly like the original, except they
13845 don't have the normal type. */
13849 ui_out_emit_tuple
option_emitter (uiout
, "option");
13851 uiout
->field_string ("name", list
->name
);
13852 uiout
->text (": ");
13853 if (list
->type
== show_cmd
)
13854 do_show_command (NULL
, from_tty
, list
);
13856 cmd_func (list
, NULL
, from_tty
);
13861 /* Function to be called whenever a new objfile (shlib) is detected. */
13863 remote_new_objfile (struct objfile
*objfile
)
13865 struct remote_state
*rs
= get_remote_state ();
13867 if (rs
->remote_desc
!= 0) /* Have a remote connection. */
13868 remote_check_symbols ();
13871 /* Pull all the tracepoints defined on the target and create local
13872 data structures representing them. We don't want to create real
13873 tracepoints yet, we don't want to mess up the user's existing
13877 remote_upload_tracepoints (struct target_ops
*self
, struct uploaded_tp
**utpp
)
13879 struct remote_state
*rs
= get_remote_state ();
13882 /* Ask for a first packet of tracepoint definition. */
13884 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13886 while (*p
&& *p
!= 'l')
13888 parse_tracepoint_definition (p
, utpp
);
13889 /* Ask for another packet of tracepoint definition. */
13891 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13898 remote_upload_trace_state_variables (struct target_ops
*self
,
13899 struct uploaded_tsv
**utsvp
)
13901 struct remote_state
*rs
= get_remote_state ();
13904 /* Ask for a first packet of variable definition. */
13906 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13908 while (*p
&& *p
!= 'l')
13910 parse_tsv_definition (p
, utsvp
);
13911 /* Ask for another packet of variable definition. */
13913 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13919 /* The "set/show range-stepping" show hook. */
13922 show_range_stepping (struct ui_file
*file
, int from_tty
,
13923 struct cmd_list_element
*c
,
13926 fprintf_filtered (file
,
13927 _("Debugger's willingness to use range stepping "
13928 "is %s.\n"), value
);
13931 /* The "set/show range-stepping" set hook. */
13934 set_range_stepping (const char *ignore_args
, int from_tty
,
13935 struct cmd_list_element
*c
)
13937 struct remote_state
*rs
= get_remote_state ();
13939 /* Whene enabling, check whether range stepping is actually
13940 supported by the target, and warn if not. */
13941 if (use_range_stepping
)
13943 if (rs
->remote_desc
!= NULL
)
13945 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13946 remote_vcont_probe (rs
);
13948 if (packet_support (PACKET_vCont
) == PACKET_ENABLE
13949 && rs
->supports_vCont
.r
)
13953 warning (_("Range stepping is not supported by the current target"));
13958 _initialize_remote (void)
13960 struct cmd_list_element
*cmd
;
13961 const char *cmd_name
;
13963 /* architecture specific data */
13964 remote_gdbarch_data_handle
=
13965 gdbarch_data_register_post_init (init_remote_state
);
13966 remote_g_packet_data_handle
=
13967 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
13970 = register_program_space_data_with_cleanup (NULL
,
13971 remote_pspace_data_cleanup
);
13973 /* Initialize the per-target state. At the moment there is only one
13974 of these, not one per target. Only one target is active at a
13976 remote_state
= new_remote_state ();
13978 init_remote_ops ();
13979 add_target (&remote_ops
);
13981 init_extended_remote_ops ();
13982 add_target (&extended_remote_ops
);
13984 /* Hook into new objfile notification. */
13985 observer_attach_new_objfile (remote_new_objfile
);
13986 /* We're no longer interested in notification events of an inferior
13988 observer_attach_inferior_exit (discard_pending_stop_replies
);
13991 init_remote_threadtests ();
13994 stop_reply_queue
= QUEUE_alloc (stop_reply_p
, stop_reply_xfree
);
13995 /* set/show remote ... */
13997 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
13998 Remote protocol specific variables\n\
13999 Configure various remote-protocol specific variables such as\n\
14000 the packets being used"),
14001 &remote_set_cmdlist
, "set remote ",
14002 0 /* allow-unknown */, &setlist
);
14003 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14004 Remote protocol specific variables\n\
14005 Configure various remote-protocol specific variables such as\n\
14006 the packets being used"),
14007 &remote_show_cmdlist
, "show remote ",
14008 0 /* allow-unknown */, &showlist
);
14010 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14011 Compare section data on target to the exec file.\n\
14012 Argument is a single section name (default: all loaded sections).\n\
14013 To compare only read-only loaded sections, specify the -r option."),
14016 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14017 Send an arbitrary packet to a remote target.\n\
14018 maintenance packet TEXT\n\
14019 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14020 this command sends the string TEXT to the inferior, and displays the\n\
14021 response packet. GDB supplies the initial `$' character, and the\n\
14022 terminating `#' character and checksum."),
14025 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14026 Set whether to send break if interrupted."), _("\
14027 Show whether to send break if interrupted."), _("\
14028 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14029 set_remotebreak
, show_remotebreak
,
14030 &setlist
, &showlist
);
14031 cmd_name
= "remotebreak";
14032 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
14033 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14034 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14035 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
14036 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14038 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14039 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14041 Set interrupt sequence to remote target."), _("\
14042 Show interrupt sequence to remote target."), _("\
14043 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14044 NULL
, show_interrupt_sequence
,
14045 &remote_set_cmdlist
,
14046 &remote_show_cmdlist
);
14048 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14049 &interrupt_on_connect
, _("\
14050 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14051 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14052 If set, interrupt sequence is sent to remote target."),
14054 &remote_set_cmdlist
, &remote_show_cmdlist
);
14056 /* Install commands for configuring memory read/write packets. */
14058 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14059 Set the maximum number of bytes per memory write packet (deprecated)."),
14061 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14062 Show the maximum number of bytes per memory write packet (deprecated)."),
14064 add_cmd ("memory-write-packet-size", no_class
,
14065 set_memory_write_packet_size
, _("\
14066 Set the maximum number of bytes per memory-write packet.\n\
14067 Specify the number of bytes in a packet or 0 (zero) for the\n\
14068 default packet size. The actual limit is further reduced\n\
14069 dependent on the target. Specify ``fixed'' to disable the\n\
14070 further restriction and ``limit'' to enable that restriction."),
14071 &remote_set_cmdlist
);
14072 add_cmd ("memory-read-packet-size", no_class
,
14073 set_memory_read_packet_size
, _("\
14074 Set the maximum number of bytes per memory-read packet.\n\
14075 Specify the number of bytes in a packet or 0 (zero) for the\n\
14076 default packet size. The actual limit is further reduced\n\
14077 dependent on the target. Specify ``fixed'' to disable the\n\
14078 further restriction and ``limit'' to enable that restriction."),
14079 &remote_set_cmdlist
);
14080 add_cmd ("memory-write-packet-size", no_class
,
14081 show_memory_write_packet_size
,
14082 _("Show the maximum number of bytes per memory-write packet."),
14083 &remote_show_cmdlist
);
14084 add_cmd ("memory-read-packet-size", no_class
,
14085 show_memory_read_packet_size
,
14086 _("Show the maximum number of bytes per memory-read packet."),
14087 &remote_show_cmdlist
);
14089 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
14090 &remote_hw_watchpoint_limit
, _("\
14091 Set the maximum number of target hardware watchpoints."), _("\
14092 Show the maximum number of target hardware watchpoints."), _("\
14093 Specify a negative limit for unlimited."),
14094 NULL
, NULL
, /* FIXME: i18n: The maximum
14095 number of target hardware
14096 watchpoints is %s. */
14097 &remote_set_cmdlist
, &remote_show_cmdlist
);
14098 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class
,
14099 &remote_hw_watchpoint_length_limit
, _("\
14100 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14101 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14102 Specify a negative limit for unlimited."),
14103 NULL
, NULL
, /* FIXME: i18n: The maximum
14104 length (in bytes) of a target
14105 hardware watchpoint is %s. */
14106 &remote_set_cmdlist
, &remote_show_cmdlist
);
14107 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
14108 &remote_hw_breakpoint_limit
, _("\
14109 Set the maximum number of target hardware breakpoints."), _("\
14110 Show the maximum number of target hardware breakpoints."), _("\
14111 Specify a negative limit for unlimited."),
14112 NULL
, NULL
, /* FIXME: i18n: The maximum
14113 number of target hardware
14114 breakpoints is %s. */
14115 &remote_set_cmdlist
, &remote_show_cmdlist
);
14117 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14118 &remote_address_size
, _("\
14119 Set the maximum size of the address (in bits) in a memory packet."), _("\
14120 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14122 NULL
, /* FIXME: i18n: */
14123 &setlist
, &showlist
);
14125 init_all_packet_configs ();
14127 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14128 "X", "binary-download", 1);
14130 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14131 "vCont", "verbose-resume", 0);
14133 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14134 "QPassSignals", "pass-signals", 0);
14136 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14137 "QCatchSyscalls", "catch-syscalls", 0);
14139 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14140 "QProgramSignals", "program-signals", 0);
14142 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14143 "QSetWorkingDir", "set-working-dir", 0);
14145 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14146 "QStartupWithShell", "startup-with-shell", 0);
14148 add_packet_config_cmd (&remote_protocol_packets
14149 [PACKET_QEnvironmentHexEncoded
],
14150 "QEnvironmentHexEncoded", "environment-hex-encoded",
14153 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14154 "QEnvironmentReset", "environment-reset",
14157 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14158 "QEnvironmentUnset", "environment-unset",
14161 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14162 "qSymbol", "symbol-lookup", 0);
14164 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14165 "P", "set-register", 1);
14167 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14168 "p", "fetch-register", 1);
14170 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14171 "Z0", "software-breakpoint", 0);
14173 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14174 "Z1", "hardware-breakpoint", 0);
14176 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14177 "Z2", "write-watchpoint", 0);
14179 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14180 "Z3", "read-watchpoint", 0);
14182 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14183 "Z4", "access-watchpoint", 0);
14185 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14186 "qXfer:auxv:read", "read-aux-vector", 0);
14188 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14189 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14191 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14192 "qXfer:features:read", "target-features", 0);
14194 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14195 "qXfer:libraries:read", "library-info", 0);
14197 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14198 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14200 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14201 "qXfer:memory-map:read", "memory-map", 0);
14203 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
14204 "qXfer:spu:read", "read-spu-object", 0);
14206 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
14207 "qXfer:spu:write", "write-spu-object", 0);
14209 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14210 "qXfer:osdata:read", "osdata", 0);
14212 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14213 "qXfer:threads:read", "threads", 0);
14215 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14216 "qXfer:siginfo:read", "read-siginfo-object", 0);
14218 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14219 "qXfer:siginfo:write", "write-siginfo-object", 0);
14221 add_packet_config_cmd
14222 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14223 "qXfer:traceframe-info:read", "traceframe-info", 0);
14225 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14226 "qXfer:uib:read", "unwind-info-block", 0);
14228 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14229 "qGetTLSAddr", "get-thread-local-storage-address",
14232 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14233 "qGetTIBAddr", "get-thread-information-block-address",
14236 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14237 "bc", "reverse-continue", 0);
14239 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14240 "bs", "reverse-step", 0);
14242 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14243 "qSupported", "supported-packets", 0);
14245 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14246 "qSearch:memory", "search-memory", 0);
14248 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14249 "qTStatus", "trace-status", 0);
14251 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14252 "vFile:setfs", "hostio-setfs", 0);
14254 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14255 "vFile:open", "hostio-open", 0);
14257 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14258 "vFile:pread", "hostio-pread", 0);
14260 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14261 "vFile:pwrite", "hostio-pwrite", 0);
14263 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14264 "vFile:close", "hostio-close", 0);
14266 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14267 "vFile:unlink", "hostio-unlink", 0);
14269 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14270 "vFile:readlink", "hostio-readlink", 0);
14272 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14273 "vFile:fstat", "hostio-fstat", 0);
14275 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14276 "vAttach", "attach", 0);
14278 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14281 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14282 "QStartNoAckMode", "noack", 0);
14284 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14285 "vKill", "kill", 0);
14287 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14288 "qAttached", "query-attached", 0);
14290 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14291 "ConditionalTracepoints",
14292 "conditional-tracepoints", 0);
14294 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14295 "ConditionalBreakpoints",
14296 "conditional-breakpoints", 0);
14298 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14299 "BreakpointCommands",
14300 "breakpoint-commands", 0);
14302 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14303 "FastTracepoints", "fast-tracepoints", 0);
14305 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14306 "TracepointSource", "TracepointSource", 0);
14308 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14309 "QAllow", "allow", 0);
14311 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14312 "StaticTracepoints", "static-tracepoints", 0);
14314 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14315 "InstallInTrace", "install-in-trace", 0);
14317 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14318 "qXfer:statictrace:read", "read-sdata-object", 0);
14320 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14321 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14323 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14324 "QDisableRandomization", "disable-randomization", 0);
14326 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14327 "QAgent", "agent", 0);
14329 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14330 "QTBuffer:size", "trace-buffer-size", 0);
14332 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14333 "Qbtrace:off", "disable-btrace", 0);
14335 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14336 "Qbtrace:bts", "enable-btrace-bts", 0);
14338 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14339 "Qbtrace:pt", "enable-btrace-pt", 0);
14341 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14342 "qXfer:btrace", "read-btrace", 0);
14344 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14345 "qXfer:btrace-conf", "read-btrace-conf", 0);
14347 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14348 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14350 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14351 "multiprocess-feature", "multiprocess-feature", 0);
14353 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14354 "swbreak-feature", "swbreak-feature", 0);
14356 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14357 "hwbreak-feature", "hwbreak-feature", 0);
14359 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14360 "fork-event-feature", "fork-event-feature", 0);
14362 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14363 "vfork-event-feature", "vfork-event-feature", 0);
14365 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14366 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14368 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14369 "vContSupported", "verbose-resume-supported", 0);
14371 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14372 "exec-event-feature", "exec-event-feature", 0);
14374 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14375 "vCtrlC", "ctrl-c", 0);
14377 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14378 "QThreadEvents", "thread-events", 0);
14380 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14381 "N stop reply", "no-resumed-stop-reply", 0);
14383 /* Assert that we've registered "set remote foo-packet" commands
14384 for all packet configs. */
14388 for (i
= 0; i
< PACKET_MAX
; i
++)
14390 /* Ideally all configs would have a command associated. Some
14391 still don't though. */
14396 case PACKET_QNonStop
:
14397 case PACKET_EnableDisableTracepoints_feature
:
14398 case PACKET_tracenz_feature
:
14399 case PACKET_DisconnectedTracing_feature
:
14400 case PACKET_augmented_libraries_svr4_read_feature
:
14402 /* Additions to this list need to be well justified:
14403 pre-existing packets are OK; new packets are not. */
14411 /* This catches both forgetting to add a config command, and
14412 forgetting to remove a packet from the exception list. */
14413 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14417 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14418 Z sub-packet has its own set and show commands, but users may
14419 have sets to this variable in their .gdbinit files (or in their
14421 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14422 &remote_Z_packet_detect
, _("\
14423 Set use of remote protocol `Z' packets"), _("\
14424 Show use of remote protocol `Z' packets "), _("\
14425 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14427 set_remote_protocol_Z_packet_cmd
,
14428 show_remote_protocol_Z_packet_cmd
,
14429 /* FIXME: i18n: Use of remote protocol
14430 `Z' packets is %s. */
14431 &remote_set_cmdlist
, &remote_show_cmdlist
);
14433 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
14434 Manipulate files on the remote system\n\
14435 Transfer files to and from the remote target system."),
14436 &remote_cmdlist
, "remote ",
14437 0 /* allow-unknown */, &cmdlist
);
14439 add_cmd ("put", class_files
, remote_put_command
,
14440 _("Copy a local file to the remote system."),
14443 add_cmd ("get", class_files
, remote_get_command
,
14444 _("Copy a remote file to the local system."),
14447 add_cmd ("delete", class_files
, remote_delete_command
,
14448 _("Delete a remote file."),
14451 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14452 &remote_exec_file_var
, _("\
14453 Set the remote pathname for \"run\""), _("\
14454 Show the remote pathname for \"run\""), NULL
,
14455 set_remote_exec_file
,
14456 show_remote_exec_file
,
14457 &remote_set_cmdlist
,
14458 &remote_show_cmdlist
);
14460 add_setshow_boolean_cmd ("range-stepping", class_run
,
14461 &use_range_stepping
, _("\
14462 Enable or disable range stepping."), _("\
14463 Show whether target-assisted range stepping is enabled."), _("\
14464 If on, and the target supports it, when stepping a source line, GDB\n\
14465 tells the target to step the corresponding range of addresses itself instead\n\
14466 of issuing multiple single-steps. This speeds up source level\n\
14467 stepping. If off, GDB always issues single-steps, even if range\n\
14468 stepping is supported by the target. The default is on."),
14469 set_range_stepping
,
14470 show_range_stepping
,
14474 /* Eventually initialize fileio. See fileio.c */
14475 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
14477 /* Take advantage of the fact that the TID field is not used, to tag
14478 special ptids with it set to != 0. */
14479 magic_null_ptid
= ptid_build (42000, -1, 1);
14480 not_sent_ptid
= ptid_build (42000, -2, 1);
14481 any_thread_ptid
= ptid_build (42000, 0, 1);