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 (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 (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;
1010 /* Temporary to track who currently owns the terminal. See
1011 remote_terminal_* for more details. */
1013 static int remote_async_terminal_ours_p;
1016 /* User configurable variables for the number of characters in a
1017 memory read/write packet. MIN (rsa->remote_packet_size,
1018 rsa->sizeof_g_packet) is the default. Some targets need smaller
1019 values (fifo overruns, et.al.) and some users need larger values
1020 (speed up transfers). The variables ``preferred_*'' (the user
1021 request), ``current_*'' (what was actually set) and ``forced_*''
1022 (Positive - a soft limit, negative - a hard limit). */
1024 struct memory_packet_config
1031 /* The default max memory-write-packet-size. The 16k is historical.
1032 (It came from older GDB's using alloca for buffers and the
1033 knowledge (folklore?) that some hosts don't cope very well with
1034 large alloca calls.) */
1035 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1037 /* The minimum remote packet size for memory transfers. Ensures we
1038 can write at least one byte. */
1039 #define MIN_MEMORY_PACKET_SIZE 20
1041 /* Compute the current size of a read/write packet. Since this makes
1042 use of ``actual_register_packet_size'' the computation is dynamic. */
1045 get_memory_packet_size (struct memory_packet_config *config)
1047 struct remote_state *rs = get_remote_state ();
1048 remote_arch_state *rsa = get_remote_arch_state (target_gdbarch ());
1051 if (config->fixed_p)
1053 if (config->size <= 0)
1054 what_they_get = DEFAULT_MAX_MEMORY_PACKET_SIZE;
1056 what_they_get = config->size;
1060 what_they_get = get_remote_packet_size ();
1061 /* Limit the packet to the size specified by the user. */
1062 if (config->size > 0
1063 && what_they_get > config->size)
1064 what_they_get = config->size;
1066 /* Limit it to the size of the targets ``g'' response unless we have
1067 permission from the stub to use a larger packet size. */
1068 if (rs->explicit_packet_size == 0
1069 && rsa->actual_register_packet_size > 0
1070 && what_they_get > rsa->actual_register_packet_size)
1071 what_they_get = rsa->actual_register_packet_size;
1073 if (what_they_get < MIN_MEMORY_PACKET_SIZE)
1074 what_they_get = MIN_MEMORY_PACKET_SIZE;
1076 /* Make sure there is room in the global buffer for this packet
1077 (including its trailing NUL byte). */
1078 if (rs->buf_size < what_they_get + 1)
1080 rs->buf_size = 2 * what_they_get;
1081 rs->buf = (char *) xrealloc (rs->buf, 2 * what_they_get);
1084 return what_they_get;
1087 /* Update the size of a read/write packet. If they user wants
1088 something really big then do a sanity check. */
1091 set_memory_packet_size (const char *args, struct memory_packet_config *config)
1093 int fixed_p = config->fixed_p;
1094 long size = config->size;
1097 error (_("Argument required (integer, `fixed' or `limited')."));
1098 else if (strcmp (args, "hard") == 0
1099 || strcmp (args, "fixed") == 0)
1101 else if (strcmp (args, "soft") == 0
1102 || strcmp (args, "limit") == 0)
1108 size = strtoul (args, &end, 0);
1110 error (_("Invalid %s (bad syntax)."), config->name);
1112 /* Instead of explicitly capping the size of a packet to or
1113 disallowing it, the user is allowed to set the size to
1114 something arbitrarily large. */
1117 /* So that the query shows the correct value. */
1119 size = DEFAULT_MAX_MEMORY_PACKET_SIZE;
1122 if (fixed_p && !config->fixed_p)
1124 if (! query (_("The target may not be able to correctly handle a %s\n"
1125 "of %ld bytes. Change the packet size? "),
1126 config->name, size))
1127 error (_("Packet size not changed."));
1129 /* Update the config. */
1130 config->fixed_p = fixed_p;
1131 config->size = size;
1135 show_memory_packet_size (struct memory_packet_config *config)
1137 printf_filtered (_("The %s is %ld. "), config->name, config->size);
1138 if (config->fixed_p)
1139 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1140 get_memory_packet_size (config));
1142 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1143 get_memory_packet_size (config));
1146 static struct memory_packet_config memory_write_packet_config =
1148 "memory-write-packet-size",
1152 set_memory_write_packet_size (const char *args, int from_tty)
1154 set_memory_packet_size (args, &memory_write_packet_config);
1158 show_memory_write_packet_size (const char *args, int from_tty)
1160 show_memory_packet_size (&memory_write_packet_config);
1164 get_memory_write_packet_size (void)
1166 return get_memory_packet_size (&memory_write_packet_config);
1169 static struct memory_packet_config memory_read_packet_config =
1171 "memory-read-packet-size",
1175 set_memory_read_packet_size (const char *args, int from_tty)
1177 set_memory_packet_size (args, &memory_read_packet_config);
1181 show_memory_read_packet_size (const char *args, int from_tty)
1183 show_memory_packet_size (&memory_read_packet_config);
1187 get_memory_read_packet_size (void)
1189 long size = get_memory_packet_size (&memory_read_packet_config);
1191 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1192 extra buffer size argument before the memory read size can be
1193 increased beyond this. */
1194 if (size > get_remote_packet_size ())
1195 size = get_remote_packet_size ();
1200 /* Generic configuration support for packets the stub optionally
1201 supports. Allows the user to specify the use of the packet as well
1202 as allowing GDB to auto-detect support in the remote stub. */
1206 PACKET_SUPPORT_UNKNOWN = 0,
1211 struct packet_config
1216 /* If auto, GDB auto-detects support for this packet or feature,
1217 either through qSupported, or by trying the packet and looking
1218 at the response. If true, GDB assumes the target supports this
1219 packet. If false, the packet is disabled. Configs that don't
1220 have an associated command always have this set to auto. */
1221 enum auto_boolean detect;
1223 /* Does the target support this packet? */
1224 enum packet_support support;
1227 /* Analyze a packet's return value and update the packet config
1237 static enum packet_support packet_config_support (struct packet_config *config);
1238 static enum packet_support packet_support (int packet);
1241 show_packet_config_cmd (struct packet_config *config)
1243 const char *support = "internal-error";
1245 switch (packet_config_support (config))
1248 support = "enabled";
1250 case PACKET_DISABLE:
1251 support = "disabled";
1253 case PACKET_SUPPORT_UNKNOWN:
1254 support = "unknown";
1257 switch (config->detect)
1259 case AUTO_BOOLEAN_AUTO:
1260 printf_filtered (_("Support for the `%s' packet "
1261 "is auto-detected, currently %s.\n"),
1262 config->name, support);
1264 case AUTO_BOOLEAN_TRUE:
1265 case AUTO_BOOLEAN_FALSE:
1266 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1267 config->name, support);
1273 add_packet_config_cmd (struct packet_config *config, const char *name,
1274 const char *title, int legacy)
1280 config->name = name;
1281 config->title = title;
1282 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1284 show_doc = xstrprintf ("Show current use of remote "
1285 "protocol `%s' (%s) packet",
1287 /* set/show TITLE-packet {auto,on,off} */
1288 cmd_name = xstrprintf ("%s-packet", title);
1289 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
1290 &config->detect, set_doc,
1291 show_doc, NULL, /* help_doc */
1293 show_remote_protocol_packet_cmd,
1294 &remote_set_cmdlist, &remote_show_cmdlist);
1295 /* The command code copies the documentation strings. */
1298 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1303 legacy_name = xstrprintf ("%s-packet", name);
1304 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1305 &remote_set_cmdlist);
1306 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1307 &remote_show_cmdlist);
1311 static enum packet_result
1312 packet_check_result (const char *buf)
1316 /* The stub recognized the packet request. Check that the
1317 operation succeeded. */
1319 && isxdigit (buf[1]) && isxdigit (buf[2])
1321 /* "Enn" - definitly an error. */
1322 return PACKET_ERROR;
1324 /* Always treat "E." as an error. This will be used for
1325 more verbose error messages, such as E.memtypes. */
1326 if (buf[0] == 'E' && buf[1] == '.')
1327 return PACKET_ERROR;
1329 /* The packet may or may not be OK. Just assume it is. */
1333 /* The stub does not support the packet. */
1334 return PACKET_UNKNOWN;
1337 static enum packet_result
1338 packet_ok (const char *buf, struct packet_config *config)
1340 enum packet_result result;
1342 if (config->detect != AUTO_BOOLEAN_TRUE
1343 && config->support == PACKET_DISABLE)
1344 internal_error (__FILE__, __LINE__,
1345 _("packet_ok: attempt to use a disabled packet"));
1347 result = packet_check_result (buf);
1352 /* The stub recognized the packet request. */
1353 if (config->support == PACKET_SUPPORT_UNKNOWN)
1356 fprintf_unfiltered (gdb_stdlog,
1357 "Packet %s (%s) is supported\n",
1358 config->name, config->title);
1359 config->support = PACKET_ENABLE;
1362 case PACKET_UNKNOWN:
1363 /* The stub does not support the packet. */
1364 if (config->detect == AUTO_BOOLEAN_AUTO
1365 && config->support == PACKET_ENABLE)
1367 /* If the stub previously indicated that the packet was
1368 supported then there is a protocol error. */
1369 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1370 config->name, config->title);
1372 else if (config->detect == AUTO_BOOLEAN_TRUE)
1374 /* The user set it wrong. */
1375 error (_("Enabled packet %s (%s) not recognized by stub"),
1376 config->name, config->title);
1380 fprintf_unfiltered (gdb_stdlog,
1381 "Packet %s (%s) is NOT supported\n",
1382 config->name, config->title);
1383 config->support = PACKET_DISABLE;
1404 PACKET_vFile_pwrite,
1406 PACKET_vFile_unlink,
1407 PACKET_vFile_readlink,
1410 PACKET_qXfer_features,
1411 PACKET_qXfer_exec_file,
1412 PACKET_qXfer_libraries,
1413 PACKET_qXfer_libraries_svr4,
1414 PACKET_qXfer_memory_map,
1415 PACKET_qXfer_spu_read,
1416 PACKET_qXfer_spu_write,
1417 PACKET_qXfer_osdata,
1418 PACKET_qXfer_threads,
1419 PACKET_qXfer_statictrace_read,
1420 PACKET_qXfer_traceframe_info,
1426 PACKET_QPassSignals,
1427 PACKET_QCatchSyscalls,
1428 PACKET_QProgramSignals,
1429 PACKET_QSetWorkingDir,
1430 PACKET_QStartupWithShell,
1431 PACKET_QEnvironmentHexEncoded,
1432 PACKET_QEnvironmentReset,
1433 PACKET_QEnvironmentUnset,
1435 PACKET_qSearch_memory,
1438 PACKET_QStartNoAckMode,
1440 PACKET_qXfer_siginfo_read,
1441 PACKET_qXfer_siginfo_write,
1444 /* Support for conditional tracepoints. */
1445 PACKET_ConditionalTracepoints,
1447 /* Support for target-side breakpoint conditions. */
1448 PACKET_ConditionalBreakpoints,
1450 /* Support for target-side breakpoint commands. */
1451 PACKET_BreakpointCommands,
1453 /* Support for fast tracepoints. */
1454 PACKET_FastTracepoints,
1456 /* Support for static tracepoints. */
1457 PACKET_StaticTracepoints,
1459 /* Support for installing tracepoints while a trace experiment is
1461 PACKET_InstallInTrace,
1465 PACKET_TracepointSource,
1468 PACKET_QDisableRandomization,
1470 PACKET_QTBuffer_size,
1474 PACKET_qXfer_btrace,
1476 /* Support for the QNonStop packet. */
1479 /* Support for the QThreadEvents packet. */
1480 PACKET_QThreadEvents,
1482 /* Support for multi-process extensions. */
1483 PACKET_multiprocess_feature,
1485 /* Support for enabling and disabling tracepoints while a trace
1486 experiment is running. */
1487 PACKET_EnableDisableTracepoints_feature,
1489 /* Support for collecting strings using the tracenz bytecode. */
1490 PACKET_tracenz_feature,
1492 /* Support for continuing to run a trace experiment while GDB is
1494 PACKET_DisconnectedTracing_feature,
1496 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1497 PACKET_augmented_libraries_svr4_read_feature,
1499 /* Support for the qXfer:btrace-conf:read packet. */
1500 PACKET_qXfer_btrace_conf,
1502 /* Support for the Qbtrace-conf:bts:size packet. */
1503 PACKET_Qbtrace_conf_bts_size,
1505 /* Support for swbreak+ feature. */
1506 PACKET_swbreak_feature,
1508 /* Support for hwbreak+ feature. */
1509 PACKET_hwbreak_feature,
1511 /* Support for fork events. */
1512 PACKET_fork_event_feature,
1514 /* Support for vfork events. */
1515 PACKET_vfork_event_feature,
1517 /* Support for the Qbtrace-conf:pt:size packet. */
1518 PACKET_Qbtrace_conf_pt_size,
1520 /* Support for exec events. */
1521 PACKET_exec_event_feature,
1523 /* Support for query supported vCont actions. */
1524 PACKET_vContSupported,
1526 /* Support remote CTRL-C. */
1529 /* Support TARGET_WAITKIND_NO_RESUMED. */
1535 static struct packet_config remote_protocol_packets[PACKET_MAX];
1537 /* Returns the packet's corresponding "set remote foo-packet" command
1538 state. See struct packet_config for more details. */
1540 static enum auto_boolean
1541 packet_set_cmd_state (int packet)
1543 return remote_protocol_packets[packet].detect;
1546 /* Returns whether a given packet or feature is supported. This takes
1547 into account the state of the corresponding "set remote foo-packet"
1548 command, which may be used to bypass auto-detection. */
1550 static enum packet_support
1551 packet_config_support (struct packet_config *config)
1553 switch (config->detect)
1555 case AUTO_BOOLEAN_TRUE:
1556 return PACKET_ENABLE;
1557 case AUTO_BOOLEAN_FALSE:
1558 return PACKET_DISABLE;
1559 case AUTO_BOOLEAN_AUTO:
1560 return config->support;
1562 gdb_assert_not_reached (_("bad switch"));
1566 /* Same as packet_config_support, but takes the packet's enum value as
1569 static enum packet_support
1570 packet_support (int packet)
1572 struct packet_config *config = &remote_protocol_packets[packet];
1574 return packet_config_support (config);
1578 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
1579 struct cmd_list_element *c,
1582 struct packet_config *packet;
1584 for (packet = remote_protocol_packets;
1585 packet < &remote_protocol_packets[PACKET_MAX];
1588 if (&packet->detect == c->var)
1590 show_packet_config_cmd (packet);
1594 internal_error (__FILE__, __LINE__, _("Could not find config for %s"),
1598 /* Should we try one of the 'Z' requests? */
1602 Z_PACKET_SOFTWARE_BP,
1603 Z_PACKET_HARDWARE_BP,
1610 /* For compatibility with older distributions. Provide a ``set remote
1611 Z-packet ...'' command that updates all the Z packet types. */
1613 static enum auto_boolean remote_Z_packet_detect;
1616 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
1617 struct cmd_list_element *c)
1621 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1622 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
1626 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
1627 struct cmd_list_element *c,
1632 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1634 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
1638 /* Returns true if the multi-process extensions are in effect. */
1641 remote_multi_process_p (struct remote_state *rs)
1643 return packet_support (PACKET_multiprocess_feature) == PACKET_ENABLE;
1646 /* Returns true if fork events are supported. */
1649 remote_fork_event_p (struct remote_state *rs)
1651 return packet_support (PACKET_fork_event_feature) == PACKET_ENABLE;
1654 /* Returns true if vfork events are supported. */
1657 remote_vfork_event_p (struct remote_state *rs)
1659 return packet_support (PACKET_vfork_event_feature) == PACKET_ENABLE;
1662 /* Returns true if exec events are supported. */
1665 remote_exec_event_p (struct remote_state *rs)
1667 return packet_support (PACKET_exec_event_feature) == PACKET_ENABLE;
1670 /* Insert fork catchpoint target routine. If fork events are enabled
1671 then return success, nothing more to do. */
1674 remote_insert_fork_catchpoint (struct target_ops *ops, int pid)
1676 struct remote_state *rs = get_remote_state ();
1678 return !remote_fork_event_p (rs);
1681 /* Remove fork catchpoint target routine. Nothing to do, just
1685 remote_remove_fork_catchpoint (struct target_ops *ops, int pid)
1690 /* Insert vfork catchpoint target routine. If vfork events are enabled
1691 then return success, nothing more to do. */
1694 remote_insert_vfork_catchpoint (struct target_ops *ops, int pid)
1696 struct remote_state *rs = get_remote_state ();
1698 return !remote_vfork_event_p (rs);
1701 /* Remove vfork catchpoint target routine. Nothing to do, just
1705 remote_remove_vfork_catchpoint (struct target_ops *ops, int pid)
1710 /* Insert exec catchpoint target routine. If exec events are
1711 enabled, just return success. */
1714 remote_insert_exec_catchpoint (struct target_ops *ops, int pid)
1716 struct remote_state *rs = get_remote_state ();
1718 return !remote_exec_event_p (rs);
1721 /* Remove exec catchpoint target routine. Nothing to do, just
1725 remote_remove_exec_catchpoint (struct target_ops *ops, int pid)
1731 /* Asynchronous signal handle registered as event loop source for
1732 when we have pending events ready to be passed to the core. */
1734 static struct async_event_handler *remote_async_inferior_event_token;
1738 static ptid_t magic_null_ptid;
1739 static ptid_t not_sent_ptid;
1740 static ptid_t any_thread_ptid;
1742 /* Find out if the stub attached to PID (and hence GDB should offer to
1743 detach instead of killing it when bailing out). */
1746 remote_query_attached (int pid)
1748 struct remote_state *rs = get_remote_state ();
1749 size_t size = get_remote_packet_size ();
1751 if (packet_support (PACKET_qAttached) == PACKET_DISABLE)
1754 if (remote_multi_process_p (rs))
1755 xsnprintf (rs->buf, size, "qAttached:%x", pid);
1757 xsnprintf (rs->buf, size, "qAttached");
1760 getpkt (&rs->buf, &rs->buf_size, 0);
1762 switch (packet_ok (rs->buf,
1763 &remote_protocol_packets[PACKET_qAttached]))
1766 if (strcmp (rs->buf, "1") == 0)
1770 warning (_("Remote failure reply: %s"), rs->buf);
1772 case PACKET_UNKNOWN:
1779 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1780 has been invented by GDB, instead of reported by the target. Since
1781 we can be connected to a remote system before before knowing about
1782 any inferior, mark the target with execution when we find the first
1783 inferior. If ATTACHED is 1, then we had just attached to this
1784 inferior. If it is 0, then we just created this inferior. If it
1785 is -1, then try querying the remote stub to find out if it had
1786 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1787 attempt to open this inferior's executable as the main executable
1788 if no main executable is open already. */
1790 static struct inferior *
1791 remote_add_inferior (int fake_pid_p, int pid, int attached,
1794 struct inferior *inf;
1796 /* Check whether this process we're learning about is to be
1797 considered attached, or if is to be considered to have been
1798 spawned by the stub. */
1800 attached = remote_query_attached (pid);
1802 if (gdbarch_has_global_solist (target_gdbarch ()))
1804 /* If the target shares code across all inferiors, then every
1805 attach adds a new inferior. */
1806 inf = add_inferior (pid);
1808 /* ... and every inferior is bound to the same program space.
1809 However, each inferior may still have its own address
1811 inf->aspace = maybe_new_address_space ();
1812 inf->pspace = current_program_space;
1816 /* In the traditional debugging scenario, there's a 1-1 match
1817 between program/address spaces. We simply bind the inferior
1818 to the program space's address space. */
1819 inf = current_inferior ();
1820 inferior_appeared (inf, pid);
1823 inf->attach_flag = attached;
1824 inf->fake_pid_p = fake_pid_p;
1826 /* If no main executable is currently open then attempt to
1827 open the file that was executed to create this inferior. */
1828 if (try_open_exec && get_exec_file (0) == NULL)
1829 exec_file_locate_attach (pid, 0, 1);
1834 static struct private_thread_info *
1835 get_private_info_thread (struct thread_info *info);
1837 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1838 according to RUNNING. */
1841 remote_add_thread (ptid_t ptid, int running, int executing)
1843 struct remote_state *rs = get_remote_state ();
1844 struct thread_info *thread;
1846 /* GDB historically didn't pull threads in the initial connection
1847 setup. If the remote target doesn't even have a concept of
1848 threads (e.g., a bare-metal target), even if internally we
1849 consider that a single-threaded target, mentioning a new thread
1850 might be confusing to the user. Be silent then, preserving the
1851 age old behavior. */
1852 if (rs->starting_up)
1853 thread = add_thread_silent (ptid);
1855 thread = add_thread (ptid);
1857 get_private_info_thread (thread)->vcont_resumed = executing;
1858 set_executing (ptid, executing);
1859 set_running (ptid, running);
1862 /* Come here when we learn about a thread id from the remote target.
1863 It may be the first time we hear about such thread, so take the
1864 opportunity to add it to GDB's thread list. In case this is the
1865 first time we're noticing its corresponding inferior, add it to
1866 GDB's inferior list as well. EXECUTING indicates whether the
1867 thread is (internally) executing or stopped. */
1870 remote_notice_new_inferior (ptid_t currthread, int executing)
1872 /* In non-stop mode, we assume new found threads are (externally)
1873 running until proven otherwise with a stop reply. In all-stop,
1874 we can only get here if all threads are stopped. */
1875 int running = target_is_non_stop_p () ? 1 : 0;
1877 /* If this is a new thread, add it to GDB's thread list.
1878 If we leave it up to WFI to do this, bad things will happen. */
1880 if (in_thread_list (currthread) && is_exited (currthread))
1882 /* We're seeing an event on a thread id we knew had exited.
1883 This has to be a new thread reusing the old id. Add it. */
1884 remote_add_thread (currthread, running, executing);
1888 if (!in_thread_list (currthread))
1890 struct inferior *inf = NULL;
1891 int pid = ptid_get_pid (currthread);
1893 if (ptid_is_pid (inferior_ptid)
1894 && pid == ptid_get_pid (inferior_ptid))
1896 /* inferior_ptid has no thread member yet. This can happen
1897 with the vAttach -> remote_wait,"TAAthread:" path if the
1898 stub doesn't support qC. This is the first stop reported
1899 after an attach, so this is the main thread. Update the
1900 ptid in the thread list. */
1901 if (in_thread_list (pid_to_ptid (pid)))
1902 thread_change_ptid (inferior_ptid, currthread);
1905 remote_add_thread (currthread, running, executing);
1906 inferior_ptid = currthread;
1911 if (ptid_equal (magic_null_ptid, inferior_ptid))
1913 /* inferior_ptid is not set yet. This can happen with the
1914 vRun -> remote_wait,"TAAthread:" path if the stub
1915 doesn't support qC. This is the first stop reported
1916 after an attach, so this is the main thread. Update the
1917 ptid in the thread list. */
1918 thread_change_ptid (inferior_ptid, currthread);
1922 /* When connecting to a target remote, or to a target
1923 extended-remote which already was debugging an inferior, we
1924 may not know about it yet. Add it before adding its child
1925 thread, so notifications are emitted in a sensible order. */
1926 if (!in_inferior_list (ptid_get_pid (currthread)))
1928 struct remote_state *rs = get_remote_state ();
1929 int fake_pid_p = !remote_multi_process_p (rs);
1931 inf = remote_add_inferior (fake_pid_p,
1932 ptid_get_pid (currthread), -1, 1);
1935 /* This is really a new thread. Add it. */
1936 remote_add_thread (currthread, running, executing);
1938 /* If we found a new inferior, let the common code do whatever
1939 it needs to with it (e.g., read shared libraries, insert
1940 breakpoints), unless we're just setting up an all-stop
1944 struct remote_state *rs = get_remote_state ();
1946 if (!rs->starting_up)
1947 notice_new_inferior (currthread, executing, 0);
1952 /* Return THREAD's private thread data, creating it if necessary. */
1954 static struct private_thread_info *
1955 get_private_info_thread (struct thread_info *thread)
1957 gdb_assert (thread != NULL);
1959 if (thread->priv == NULL)
1961 struct private_thread_info *priv = XNEW (struct private_thread_info);
1963 thread->private_dtor = free_private_thread_info;
1964 thread->priv = priv;
1970 priv->last_resume_step = 0;
1971 priv->last_resume_sig = GDB_SIGNAL_0;
1972 priv->vcont_resumed = 0;
1973 priv->thread_handle = nullptr;
1976 return thread->priv;
1979 /* Return PTID's private thread data, creating it if necessary. */
1981 static struct private_thread_info *
1982 get_private_info_ptid (ptid_t ptid)
1984 struct thread_info *info = find_thread_ptid (ptid);
1986 return get_private_info_thread (info);
1989 /* Call this function as a result of
1990 1) A halt indication (T packet) containing a thread id
1991 2) A direct query of currthread
1992 3) Successful execution of set thread */
1995 record_currthread (struct remote_state *rs, ptid_t currthread)
1997 rs->general_thread = currthread;
2000 /* If 'QPassSignals' is supported, tell the remote stub what signals
2001 it can simply pass through to the inferior without reporting. */
2004 remote_pass_signals (struct target_ops *self,
2005 int numsigs, unsigned char *pass_signals)
2007 if (packet_support (PACKET_QPassSignals) != PACKET_DISABLE)
2009 char *pass_packet, *p;
2011 struct remote_state *rs = get_remote_state ();
2013 gdb_assert (numsigs < 256);
2014 for (i = 0; i < numsigs; i++)
2016 if (pass_signals[i])
2019 pass_packet = (char *) xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
2020 strcpy (pass_packet, "QPassSignals:");
2021 p = pass_packet + strlen (pass_packet);
2022 for (i = 0; i < numsigs; i++)
2024 if (pass_signals[i])
2027 *p++ = tohex (i >> 4);
2028 *p++ = tohex (i & 15);
2037 if (!rs->last_pass_packet || strcmp (rs->last_pass_packet, pass_packet))
2039 putpkt (pass_packet);
2040 getpkt (&rs->buf, &rs->buf_size, 0);
2041 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QPassSignals]);
2042 if (rs->last_pass_packet)
2043 xfree (rs->last_pass_packet);
2044 rs->last_pass_packet = pass_packet;
2047 xfree (pass_packet);
2051 /* If 'QCatchSyscalls' is supported, tell the remote stub
2052 to report syscalls to GDB. */
2055 remote_set_syscall_catchpoint (struct target_ops *self,
2056 int pid, int needed, int any_count,
2057 int table_size, int *table)
2059 const char *catch_packet;
2060 enum packet_result result;
2063 if (packet_support (PACKET_QCatchSyscalls) == PACKET_DISABLE)
2065 /* Not supported. */
2069 if (needed && !any_count)
2073 /* Count how many syscalls are to be caught (table[sysno] != 0). */
2074 for (i = 0; i < table_size; i++)
2083 fprintf_unfiltered (gdb_stdlog,
2084 "remote_set_syscall_catchpoint "
2085 "pid %d needed %d any_count %d n_sysno %d\n",
2086 pid, needed, any_count, n_sysno);
2089 gdb::unique_xmalloc_ptr<char> built_packet;
2092 /* Prepare a packet with the sysno list, assuming max 8+1
2093 characters for a sysno. If the resulting packet size is too
2094 big, fallback on the non-selective packet. */
2095 const int maxpktsz = strlen ("QCatchSyscalls:1") + n_sysno * 9 + 1;
2097 built_packet.reset ((char *) xmalloc (maxpktsz));
2098 strcpy (built_packet.get (), "QCatchSyscalls:1");
2104 p = built_packet.get ();
2107 /* Add in catch_packet each syscall to be caught (table[i] != 0). */
2108 for (i = 0; i < table_size; i++)
2111 p += xsnprintf (p, built_packet.get () + maxpktsz - p,
2115 if (strlen (built_packet.get ()) > get_remote_packet_size ())
2117 /* catch_packet too big. Fallback to less efficient
2118 non selective mode, with GDB doing the filtering. */
2119 catch_packet = "QCatchSyscalls:1";
2122 catch_packet = built_packet.get ();
2125 catch_packet = "QCatchSyscalls:0";
2127 struct remote_state *rs = get_remote_state ();
2129 putpkt (catch_packet);
2130 getpkt (&rs->buf, &rs->buf_size, 0);
2131 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_QCatchSyscalls]);
2132 if (result == PACKET_OK)
2138 /* If 'QProgramSignals' is supported, tell the remote stub what
2139 signals it should pass through to the inferior when detaching. */
2142 remote_program_signals (struct target_ops *self,
2143 int numsigs, unsigned char *signals)
2145 if (packet_support (PACKET_QProgramSignals) != PACKET_DISABLE)
2149 struct remote_state *rs = get_remote_state ();
2151 gdb_assert (numsigs < 256);
2152 for (i = 0; i < numsigs; i++)
2157 packet = (char *) xmalloc (count * 3 + strlen ("QProgramSignals:") + 1);
2158 strcpy (packet, "QProgramSignals:");
2159 p = packet + strlen (packet);
2160 for (i = 0; i < numsigs; i++)
2162 if (signal_pass_state (i))
2165 *p++ = tohex (i >> 4);
2166 *p++ = tohex (i & 15);
2175 if (!rs->last_program_signals_packet
2176 || strcmp (rs->last_program_signals_packet, packet) != 0)
2179 getpkt (&rs->buf, &rs->buf_size, 0);
2180 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QProgramSignals]);
2181 xfree (rs->last_program_signals_packet);
2182 rs->last_program_signals_packet = packet;
2189 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2190 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2191 thread. If GEN is set, set the general thread, if not, then set
2192 the step/continue thread. */
2194 set_thread (ptid_t ptid, int gen)
2196 struct remote_state *rs = get_remote_state ();
2197 ptid_t state = gen ? rs->general_thread : rs->continue_thread;
2198 char *buf = rs->buf;
2199 char *endbuf = rs->buf + get_remote_packet_size ();
2201 if (ptid_equal (state, ptid))
2205 *buf++ = gen ? 'g' : 'c';
2206 if (ptid_equal (ptid, magic_null_ptid))
2207 xsnprintf (buf, endbuf - buf, "0");
2208 else if (ptid_equal (ptid, any_thread_ptid))
2209 xsnprintf (buf, endbuf - buf, "0");
2210 else if (ptid_equal (ptid, minus_one_ptid))
2211 xsnprintf (buf, endbuf - buf, "-1");
2213 write_ptid (buf, endbuf, ptid);
2215 getpkt (&rs->buf, &rs->buf_size, 0);
2217 rs->general_thread = ptid;
2219 rs->continue_thread = ptid;
2223 set_general_thread (ptid_t ptid)
2225 set_thread (ptid, 1);
2229 set_continue_thread (ptid_t ptid)
2231 set_thread (ptid, 0);
2234 /* Change the remote current process. Which thread within the process
2235 ends up selected isn't important, as long as it is the same process
2236 as what INFERIOR_PTID points to.
2238 This comes from that fact that there is no explicit notion of
2239 "selected process" in the protocol. The selected process for
2240 general operations is the process the selected general thread
2244 set_general_process (void)
2246 struct remote_state *rs = get_remote_state ();
2248 /* If the remote can't handle multiple processes, don't bother. */
2249 if (!remote_multi_process_p (rs))
2252 /* We only need to change the remote current thread if it's pointing
2253 at some other process. */
2254 if (ptid_get_pid (rs->general_thread) != ptid_get_pid (inferior_ptid))
2255 set_general_thread (inferior_ptid);
2259 /* Return nonzero if this is the main thread that we made up ourselves
2260 to model non-threaded targets as single-threaded. */
2263 remote_thread_always_alive (struct target_ops *ops, ptid_t ptid)
2265 if (ptid_equal (ptid, magic_null_ptid))
2266 /* The main thread is always alive. */
2269 if (ptid_get_pid (ptid) != 0 && ptid_get_lwp (ptid) == 0)
2270 /* The main thread is always alive. This can happen after a
2271 vAttach, if the remote side doesn't support
2278 /* Return nonzero if the thread PTID is still alive on the remote
2282 remote_thread_alive (struct target_ops *ops, ptid_t ptid)
2284 struct remote_state *rs = get_remote_state ();
2287 /* Check if this is a thread that we made up ourselves to model
2288 non-threaded targets as single-threaded. */
2289 if (remote_thread_always_alive (ops, ptid))
2293 endp = rs->buf + get_remote_packet_size ();
2296 write_ptid (p, endp, ptid);
2299 getpkt (&rs->buf, &rs->buf_size, 0);
2300 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
2303 /* Return a pointer to a thread name if we know it and NULL otherwise.
2304 The thread_info object owns the memory for the name. */
2307 remote_thread_name (struct target_ops *ops, struct thread_info *info)
2309 if (info->priv != NULL)
2310 return info->priv->name;
2315 /* About these extended threadlist and threadinfo packets. They are
2316 variable length packets but, the fields within them are often fixed
2317 length. They are redundent enough to send over UDP as is the
2318 remote protocol in general. There is a matching unit test module
2321 /* WARNING: This threadref data structure comes from the remote O.S.,
2322 libstub protocol encoding, and remote.c. It is not particularly
2325 /* Right now, the internal structure is int. We want it to be bigger.
2326 Plan to fix this. */
2328 typedef int gdb_threadref; /* Internal GDB thread reference. */
2330 /* gdb_ext_thread_info is an internal GDB data structure which is
2331 equivalent to the reply of the remote threadinfo packet. */
2333 struct gdb_ext_thread_info
2335 threadref threadid; /* External form of thread reference. */
2336 int active; /* Has state interesting to GDB?
2338 char display[256]; /* Brief state display, name,
2339 blocked/suspended. */
2340 char shortname[32]; /* To be used to name threads. */
2341 char more_display[256]; /* Long info, statistics, queue depth,
2345 /* The volume of remote transfers can be limited by submitting
2346 a mask containing bits specifying the desired information.
2347 Use a union of these values as the 'selection' parameter to
2348 get_thread_info. FIXME: Make these TAG names more thread specific. */
2350 #define TAG_THREADID 1
2351 #define TAG_EXISTS 2
2352 #define TAG_DISPLAY 4
2353 #define TAG_THREADNAME 8
2354 #define TAG_MOREDISPLAY 16
2356 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2358 static char *unpack_nibble (char *buf, int *val);
2360 static char *unpack_byte (char *buf, int *value);
2362 static char *pack_int (char *buf, int value);
2364 static char *unpack_int (char *buf, int *value);
2366 static char *unpack_string (char *src, char *dest, int length);
2368 static char *pack_threadid (char *pkt, threadref *id);
2370 static char *unpack_threadid (char *inbuf, threadref *id);
2372 void int_to_threadref (threadref *id, int value);
2374 static int threadref_to_int (threadref *ref);
2376 static void copy_threadref (threadref *dest, threadref *src);
2378 static int threadmatch (threadref *dest, threadref *src);
2380 static char *pack_threadinfo_request (char *pkt, int mode,
2383 static int remote_unpack_thread_info_response (char *pkt,
2384 threadref *expectedref,
2385 struct gdb_ext_thread_info
2389 static int remote_get_threadinfo (threadref *threadid,
2390 int fieldset, /*TAG mask */
2391 struct gdb_ext_thread_info *info);
2393 static char *pack_threadlist_request (char *pkt, int startflag,
2395 threadref *nextthread);
2397 static int parse_threadlist_response (char *pkt,
2399 threadref *original_echo,
2400 threadref *resultlist,
2403 static int remote_get_threadlist (int startflag,
2404 threadref *nextthread,
2408 threadref *threadlist);
2410 typedef int (*rmt_thread_action) (threadref *ref, void *context);
2412 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
2413 void *context, int looplimit);
2415 static int remote_newthread_step (threadref *ref, void *context);
2418 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2419 buffer we're allowed to write to. Returns
2420 BUF+CHARACTERS_WRITTEN. */
2423 write_ptid (char *buf, const char *endbuf, ptid_t ptid)
2426 struct remote_state *rs = get_remote_state ();
2428 if (remote_multi_process_p (rs))
2430 pid = ptid_get_pid (ptid);
2432 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
2434 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
2436 tid = ptid_get_lwp (ptid);
2438 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
2440 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
2445 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2446 last parsed char. Returns null_ptid if no thread id is found, and
2447 throws an error if the thread id has an invalid format. */
2450 read_ptid (const char *buf, const char **obuf)
2452 const char *p = buf;
2454 ULONGEST pid = 0, tid = 0;
2458 /* Multi-process ptid. */
2459 pp = unpack_varlen_hex (p + 1, &pid);
2461 error (_("invalid remote ptid: %s"), p);
2464 pp = unpack_varlen_hex (p + 1, &tid);
2467 return ptid_build (pid, tid, 0);
2470 /* No multi-process. Just a tid. */
2471 pp = unpack_varlen_hex (p, &tid);
2473 /* Return null_ptid when no thread id is found. */
2481 /* Since the stub is not sending a process id, then default to
2482 what's in inferior_ptid, unless it's null at this point. If so,
2483 then since there's no way to know the pid of the reported
2484 threads, use the magic number. */
2485 if (ptid_equal (inferior_ptid, null_ptid))
2486 pid = ptid_get_pid (magic_null_ptid);
2488 pid = ptid_get_pid (inferior_ptid);
2492 return ptid_build (pid, tid, 0);
2498 if (ch >= 'a' && ch <= 'f')
2499 return ch - 'a' + 10;
2500 if (ch >= '0' && ch <= '9')
2502 if (ch >= 'A' && ch <= 'F')
2503 return ch - 'A' + 10;
2508 stub_unpack_int (char *buff, int fieldlength)
2515 nibble = stubhex (*buff++);
2519 retval = retval << 4;
2525 unpack_nibble (char *buf, int *val)
2527 *val = fromhex (*buf++);
2532 unpack_byte (char *buf, int *value)
2534 *value = stub_unpack_int (buf, 2);
2539 pack_int (char *buf, int value)
2541 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
2542 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
2543 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
2544 buf = pack_hex_byte (buf, (value & 0xff));
2549 unpack_int (char *buf, int *value)
2551 *value = stub_unpack_int (buf, 8);
2555 #if 0 /* Currently unused, uncomment when needed. */
2556 static char *pack_string (char *pkt, char *string);
2559 pack_string (char *pkt, char *string)
2564 len = strlen (string);
2566 len = 200; /* Bigger than most GDB packets, junk??? */
2567 pkt = pack_hex_byte (pkt, len);
2571 if ((ch == '\0') || (ch == '#'))
2572 ch = '*'; /* Protect encapsulation. */
2577 #endif /* 0 (unused) */
2580 unpack_string (char *src, char *dest, int length)
2589 pack_threadid (char *pkt, threadref *id)
2592 unsigned char *altid;
2594 altid = (unsigned char *) id;
2595 limit = pkt + BUF_THREAD_ID_SIZE;
2597 pkt = pack_hex_byte (pkt, *altid++);
2603 unpack_threadid (char *inbuf, threadref *id)
2606 char *limit = inbuf + BUF_THREAD_ID_SIZE;
2609 altref = (char *) id;
2611 while (inbuf < limit)
2613 x = stubhex (*inbuf++);
2614 y = stubhex (*inbuf++);
2615 *altref++ = (x << 4) | y;
2620 /* Externally, threadrefs are 64 bits but internally, they are still
2621 ints. This is due to a mismatch of specifications. We would like
2622 to use 64bit thread references internally. This is an adapter
2626 int_to_threadref (threadref *id, int value)
2628 unsigned char *scan;
2630 scan = (unsigned char *) id;
2636 *scan++ = (value >> 24) & 0xff;
2637 *scan++ = (value >> 16) & 0xff;
2638 *scan++ = (value >> 8) & 0xff;
2639 *scan++ = (value & 0xff);
2643 threadref_to_int (threadref *ref)
2646 unsigned char *scan;
2652 value = (value << 8) | ((*scan++) & 0xff);
2657 copy_threadref (threadref *dest, threadref *src)
2660 unsigned char *csrc, *cdest;
2662 csrc = (unsigned char *) src;
2663 cdest = (unsigned char *) dest;
2670 threadmatch (threadref *dest, threadref *src)
2672 /* Things are broken right now, so just assume we got a match. */
2674 unsigned char *srcp, *destp;
2676 srcp = (char *) src;
2677 destp = (char *) dest;
2681 result &= (*srcp++ == *destp++) ? 1 : 0;
2688 threadid:1, # always request threadid
2695 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2698 pack_threadinfo_request (char *pkt, int mode, threadref *id)
2700 *pkt++ = 'q'; /* Info Query */
2701 *pkt++ = 'P'; /* process or thread info */
2702 pkt = pack_int (pkt, mode); /* mode */
2703 pkt = pack_threadid (pkt, id); /* threadid */
2704 *pkt = '\0'; /* terminate */
2708 /* These values tag the fields in a thread info response packet. */
2709 /* Tagging the fields allows us to request specific fields and to
2710 add more fields as time goes by. */
2712 #define TAG_THREADID 1 /* Echo the thread identifier. */
2713 #define TAG_EXISTS 2 /* Is this process defined enough to
2714 fetch registers and its stack? */
2715 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2716 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2717 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2721 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
2722 struct gdb_ext_thread_info *info)
2724 struct remote_state *rs = get_remote_state ();
2728 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
2731 /* info->threadid = 0; FIXME: implement zero_threadref. */
2733 info->display[0] = '\0';
2734 info->shortname[0] = '\0';
2735 info->more_display[0] = '\0';
2737 /* Assume the characters indicating the packet type have been
2739 pkt = unpack_int (pkt, &mask); /* arg mask */
2740 pkt = unpack_threadid (pkt, &ref);
2743 warning (_("Incomplete response to threadinfo request."));
2744 if (!threadmatch (&ref, expectedref))
2745 { /* This is an answer to a different request. */
2746 warning (_("ERROR RMT Thread info mismatch."));
2749 copy_threadref (&info->threadid, &ref);
2751 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2753 /* Packets are terminated with nulls. */
2754 while ((pkt < limit) && mask && *pkt)
2756 pkt = unpack_int (pkt, &tag); /* tag */
2757 pkt = unpack_byte (pkt, &length); /* length */
2758 if (!(tag & mask)) /* Tags out of synch with mask. */
2760 warning (_("ERROR RMT: threadinfo tag mismatch."));
2764 if (tag == TAG_THREADID)
2768 warning (_("ERROR RMT: length of threadid is not 16."));
2772 pkt = unpack_threadid (pkt, &ref);
2773 mask = mask & ~TAG_THREADID;
2776 if (tag == TAG_EXISTS)
2778 info->active = stub_unpack_int (pkt, length);
2780 mask = mask & ~(TAG_EXISTS);
2783 warning (_("ERROR RMT: 'exists' length too long."));
2789 if (tag == TAG_THREADNAME)
2791 pkt = unpack_string (pkt, &info->shortname[0], length);
2792 mask = mask & ~TAG_THREADNAME;
2795 if (tag == TAG_DISPLAY)
2797 pkt = unpack_string (pkt, &info->display[0], length);
2798 mask = mask & ~TAG_DISPLAY;
2801 if (tag == TAG_MOREDISPLAY)
2803 pkt = unpack_string (pkt, &info->more_display[0], length);
2804 mask = mask & ~TAG_MOREDISPLAY;
2807 warning (_("ERROR RMT: unknown thread info tag."));
2808 break; /* Not a tag we know about. */
2814 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
2815 struct gdb_ext_thread_info *info)
2817 struct remote_state *rs = get_remote_state ();
2820 pack_threadinfo_request (rs->buf, fieldset, threadid);
2822 getpkt (&rs->buf, &rs->buf_size, 0);
2824 if (rs->buf[0] == '\0')
2827 result = remote_unpack_thread_info_response (rs->buf + 2,
2832 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2835 pack_threadlist_request (char *pkt, int startflag, int threadcount,
2836 threadref *nextthread)
2838 *pkt++ = 'q'; /* info query packet */
2839 *pkt++ = 'L'; /* Process LIST or threadLIST request */
2840 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
2841 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
2842 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
2847 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2850 parse_threadlist_response (char *pkt, int result_limit,
2851 threadref *original_echo, threadref *resultlist,
2854 struct remote_state *rs = get_remote_state ();
2856 int count, resultcount, done;
2859 /* Assume the 'q' and 'M chars have been stripped. */
2860 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
2861 /* done parse past here */
2862 pkt = unpack_byte (pkt, &count); /* count field */
2863 pkt = unpack_nibble (pkt, &done);
2864 /* The first threadid is the argument threadid. */
2865 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
2866 while ((count-- > 0) && (pkt < limit))
2868 pkt = unpack_threadid (pkt, resultlist++);
2869 if (resultcount++ >= result_limit)
2877 /* Fetch the next batch of threads from the remote. Returns -1 if the
2878 qL packet is not supported, 0 on error and 1 on success. */
2881 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
2882 int *done, int *result_count, threadref *threadlist)
2884 struct remote_state *rs = get_remote_state ();
2887 /* Trancate result limit to be smaller than the packet size. */
2888 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10)
2889 >= get_remote_packet_size ())
2890 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
2892 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
2894 getpkt (&rs->buf, &rs->buf_size, 0);
2895 if (*rs->buf == '\0')
2897 /* Packet not supported. */
2902 parse_threadlist_response (rs->buf + 2, result_limit,
2903 &rs->echo_nextthread, threadlist, done);
2905 if (!threadmatch (&rs->echo_nextthread, nextthread))
2907 /* FIXME: This is a good reason to drop the packet. */
2908 /* Possably, there is a duplicate response. */
2910 retransmit immediatly - race conditions
2911 retransmit after timeout - yes
2913 wait for packet, then exit
2915 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2916 return 0; /* I choose simply exiting. */
2918 if (*result_count <= 0)
2922 warning (_("RMT ERROR : failed to get remote thread list."));
2925 return result; /* break; */
2927 if (*result_count > result_limit)
2930 warning (_("RMT ERROR: threadlist response longer than requested."));
2936 /* Fetch the list of remote threads, with the qL packet, and call
2937 STEPFUNCTION for each thread found. Stops iterating and returns 1
2938 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2939 STEPFUNCTION returns false. If the packet is not supported,
2943 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
2946 struct remote_state *rs = get_remote_state ();
2947 int done, i, result_count;
2955 if (loopcount++ > looplimit)
2958 warning (_("Remote fetch threadlist -infinite loop-."));
2961 result = remote_get_threadlist (startflag, &rs->nextthread,
2962 MAXTHREADLISTRESULTS,
2963 &done, &result_count,
2964 rs->resultthreadlist);
2967 /* Clear for later iterations. */
2969 /* Setup to resume next batch of thread references, set nextthread. */
2970 if (result_count >= 1)
2971 copy_threadref (&rs->nextthread,
2972 &rs->resultthreadlist[result_count - 1]);
2974 while (result_count--)
2976 if (!(*stepfunction) (&rs->resultthreadlist[i++], context))
2986 /* A thread found on the remote target. */
2988 typedef struct thread_item
2990 /* The thread's PTID. */
2993 /* The thread's extra info. May be NULL. */
2996 /* The thread's name. May be NULL. */
2999 /* The core the thread was running on. -1 if not known. */
3002 /* The thread handle associated with the thread. */
3003 gdb::byte_vector *thread_handle;
3006 DEF_VEC_O(thread_item_t);
3008 /* Context passed around to the various methods listing remote
3009 threads. As new threads are found, they're added to the ITEMS
3012 struct threads_listing_context
3014 /* The threads found on the remote target. */
3015 VEC (thread_item_t) *items;
3018 /* Discard the contents of the constructed thread listing context. */
3021 clear_threads_listing_context (void *p)
3023 struct threads_listing_context *context
3024 = (struct threads_listing_context *) p;
3026 struct thread_item *item;
3028 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
3030 xfree (item->extra);
3032 delete item->thread_handle;
3035 VEC_free (thread_item_t, context->items);
3038 /* Remove the thread specified as the related_pid field of WS
3039 from the CONTEXT list. */
3042 threads_listing_context_remove (struct target_waitstatus *ws,
3043 struct threads_listing_context *context)
3045 struct thread_item *item;
3047 ptid_t child_ptid = ws->value.related_pid;
3049 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
3051 if (ptid_equal (item->ptid, child_ptid))
3053 VEC_ordered_remove (thread_item_t, context->items, i);
3060 remote_newthread_step (threadref *ref, void *data)
3062 struct threads_listing_context *context
3063 = (struct threads_listing_context *) data;
3064 struct thread_item item;
3065 int pid = ptid_get_pid (inferior_ptid);
3067 item.ptid = ptid_build (pid, threadref_to_int (ref), 0);
3071 item.thread_handle = nullptr;
3073 VEC_safe_push (thread_item_t, context->items, &item);
3075 return 1; /* continue iterator */
3078 #define CRAZY_MAX_THREADS 1000
3081 remote_current_thread (ptid_t oldpid)
3083 struct remote_state *rs = get_remote_state ();
3086 getpkt (&rs->buf, &rs->buf_size, 0);
3087 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
3092 result = read_ptid (&rs->buf[2], &obuf);
3093 if (*obuf != '\0' && remote_debug)
3094 fprintf_unfiltered (gdb_stdlog,
3095 "warning: garbage in qC reply\n");
3103 /* List remote threads using the deprecated qL packet. */
3106 remote_get_threads_with_ql (struct target_ops *ops,
3107 struct threads_listing_context *context)
3109 if (remote_threadlist_iterator (remote_newthread_step, context,
3110 CRAZY_MAX_THREADS) >= 0)
3116 #if defined(HAVE_LIBEXPAT)
3119 start_thread (struct gdb_xml_parser *parser,
3120 const struct gdb_xml_element *element,
3121 void *user_data, VEC(gdb_xml_value_s) *attributes)
3123 struct threads_listing_context *data
3124 = (struct threads_listing_context *) user_data;
3126 struct thread_item item;
3128 struct gdb_xml_value *attr;
3130 id = (char *) xml_find_attribute (attributes, "id")->value;
3131 item.ptid = read_ptid (id, NULL);
3133 attr = xml_find_attribute (attributes, "core");
3135 item.core = *(ULONGEST *) attr->value;
3139 attr = xml_find_attribute (attributes, "name");
3140 item.name = attr != NULL ? xstrdup ((const char *) attr->value) : NULL;
3142 attr = xml_find_attribute (attributes, "handle");
3145 item.thread_handle = new gdb::byte_vector
3146 (strlen ((const char *) attr->value) / 2);
3147 hex2bin ((const char *) attr->value, item.thread_handle->data (),
3148 item.thread_handle->size ());
3151 item.thread_handle = nullptr;
3155 VEC_safe_push (thread_item_t, data->items, &item);
3159 end_thread (struct gdb_xml_parser *parser,
3160 const struct gdb_xml_element *element,
3161 void *user_data, const char *body_text)
3163 struct threads_listing_context *data
3164 = (struct threads_listing_context *) user_data;
3166 if (body_text && *body_text)
3167 VEC_last (thread_item_t, data->items)->extra = xstrdup (body_text);
3170 const struct gdb_xml_attribute thread_attributes[] = {
3171 { "id", GDB_XML_AF_NONE, NULL, NULL },
3172 { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
3173 { "name", GDB_XML_AF_OPTIONAL, NULL, NULL },
3174 { "handle", GDB_XML_AF_OPTIONAL, NULL, NULL },
3175 { NULL, GDB_XML_AF_NONE, NULL, NULL }
3178 const struct gdb_xml_element thread_children[] = {
3179 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3182 const struct gdb_xml_element threads_children[] = {
3183 { "thread", thread_attributes, thread_children,
3184 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
3185 start_thread, end_thread },
3186 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3189 const struct gdb_xml_element threads_elements[] = {
3190 { "threads", NULL, threads_children,
3191 GDB_XML_EF_NONE, NULL, NULL },
3192 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3197 /* List remote threads using qXfer:threads:read. */
3200 remote_get_threads_with_qxfer (struct target_ops *ops,
3201 struct threads_listing_context *context)
3203 #if defined(HAVE_LIBEXPAT)
3204 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3206 char *xml = target_read_stralloc (ops, TARGET_OBJECT_THREADS, NULL);
3207 struct cleanup *back_to = make_cleanup (xfree, xml);
3209 if (xml != NULL && *xml != '\0')
3211 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3212 threads_elements, xml, context);
3215 do_cleanups (back_to);
3223 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3226 remote_get_threads_with_qthreadinfo (struct target_ops *ops,
3227 struct threads_listing_context *context)
3229 struct remote_state *rs = get_remote_state ();
3231 if (rs->use_threadinfo_query)
3235 putpkt ("qfThreadInfo");
3236 getpkt (&rs->buf, &rs->buf_size, 0);
3238 if (bufp[0] != '\0') /* q packet recognized */
3240 while (*bufp++ == 'm') /* reply contains one or more TID */
3244 struct thread_item item;
3246 item.ptid = read_ptid (bufp, &bufp);
3250 item.thread_handle = nullptr;
3252 VEC_safe_push (thread_item_t, context->items, &item);
3254 while (*bufp++ == ','); /* comma-separated list */
3255 putpkt ("qsThreadInfo");
3256 getpkt (&rs->buf, &rs->buf_size, 0);
3263 /* Packet not recognized. */
3264 rs->use_threadinfo_query = 0;
3271 /* Implement the to_update_thread_list function for the remote
3275 remote_update_thread_list (struct target_ops *ops)
3277 struct threads_listing_context context;
3278 struct cleanup *old_chain;
3281 context.items = NULL;
3282 old_chain = make_cleanup (clear_threads_listing_context, &context);
3284 /* We have a few different mechanisms to fetch the thread list. Try
3285 them all, starting with the most preferred one first, falling
3286 back to older methods. */
3287 if (remote_get_threads_with_qxfer (ops, &context)
3288 || remote_get_threads_with_qthreadinfo (ops, &context)
3289 || remote_get_threads_with_ql (ops, &context))
3292 struct thread_item *item;
3293 struct thread_info *tp, *tmp;
3297 if (VEC_empty (thread_item_t, context.items)
3298 && remote_thread_always_alive (ops, inferior_ptid))
3300 /* Some targets don't really support threads, but still
3301 reply an (empty) thread list in response to the thread
3302 listing packets, instead of replying "packet not
3303 supported". Exit early so we don't delete the main
3305 do_cleanups (old_chain);
3309 /* CONTEXT now holds the current thread list on the remote
3310 target end. Delete GDB-side threads no longer found on the
3312 ALL_THREADS_SAFE (tp, tmp)
3315 VEC_iterate (thread_item_t, context.items, i, item);
3318 if (ptid_equal (item->ptid, tp->ptid))
3322 if (i == VEC_length (thread_item_t, context.items))
3325 delete_thread (tp->ptid);
3329 /* Remove any unreported fork child threads from CONTEXT so
3330 that we don't interfere with follow fork, which is where
3331 creation of such threads is handled. */
3332 remove_new_fork_children (&context);
3334 /* And now add threads we don't know about yet to our list. */
3336 VEC_iterate (thread_item_t, context.items, i, item);
3339 if (!ptid_equal (item->ptid, null_ptid))
3341 struct private_thread_info *info;
3342 /* In non-stop mode, we assume new found threads are
3343 executing until proven otherwise with a stop reply.
3344 In all-stop, we can only get here if all threads are
3346 int executing = target_is_non_stop_p () ? 1 : 0;
3348 remote_notice_new_inferior (item->ptid, executing);
3350 info = get_private_info_ptid (item->ptid);
3351 info->core = item->core;
3352 info->extra = item->extra;
3354 info->name = item->name;
3356 info->thread_handle = item->thread_handle;
3357 item->thread_handle = nullptr;
3364 /* If no thread listing method is supported, then query whether
3365 each known thread is alive, one by one, with the T packet.
3366 If the target doesn't support threads at all, then this is a
3367 no-op. See remote_thread_alive. */
3371 do_cleanups (old_chain);
3375 * Collect a descriptive string about the given thread.
3376 * The target may say anything it wants to about the thread
3377 * (typically info about its blocked / runnable state, name, etc.).
3378 * This string will appear in the info threads display.
3380 * Optional: targets are not required to implement this function.
3384 remote_threads_extra_info (struct target_ops *self, struct thread_info *tp)
3386 struct remote_state *rs = get_remote_state ();
3390 struct gdb_ext_thread_info threadinfo;
3391 static char display_buf[100]; /* arbitrary... */
3392 int n = 0; /* position in display_buf */
3394 if (rs->remote_desc == 0) /* paranoia */
3395 internal_error (__FILE__, __LINE__,
3396 _("remote_threads_extra_info"));
3398 if (ptid_equal (tp->ptid, magic_null_ptid)
3399 || (ptid_get_pid (tp->ptid) != 0 && ptid_get_lwp (tp->ptid) == 0))
3400 /* This is the main thread which was added by GDB. The remote
3401 server doesn't know about it. */
3404 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3406 struct thread_info *info = find_thread_ptid (tp->ptid);
3408 if (info && info->priv)
3409 return info->priv->extra;
3414 if (rs->use_threadextra_query)
3417 char *endb = rs->buf + get_remote_packet_size ();
3419 xsnprintf (b, endb - b, "qThreadExtraInfo,");
3421 write_ptid (b, endb, tp->ptid);
3424 getpkt (&rs->buf, &rs->buf_size, 0);
3425 if (rs->buf[0] != 0)
3427 n = std::min (strlen (rs->buf) / 2, sizeof (display_buf));
3428 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
3429 display_buf [result] = '\0';
3434 /* If the above query fails, fall back to the old method. */
3435 rs->use_threadextra_query = 0;
3436 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
3437 | TAG_MOREDISPLAY | TAG_DISPLAY;
3438 int_to_threadref (&id, ptid_get_lwp (tp->ptid));
3439 if (remote_get_threadinfo (&id, set, &threadinfo))
3440 if (threadinfo.active)
3442 if (*threadinfo.shortname)
3443 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
3444 " Name: %s,", threadinfo.shortname);
3445 if (*threadinfo.display)
3446 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
3447 " State: %s,", threadinfo.display);
3448 if (*threadinfo.more_display)
3449 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
3450 " Priority: %s", threadinfo.more_display);
3454 /* For purely cosmetic reasons, clear up trailing commas. */
3455 if (',' == display_buf[n-1])
3456 display_buf[n-1] = ' ';
3465 remote_static_tracepoint_marker_at (struct target_ops *self, CORE_ADDR addr,
3466 struct static_tracepoint_marker *marker)
3468 struct remote_state *rs = get_remote_state ();
3471 xsnprintf (p, get_remote_packet_size (), "qTSTMat:");
3473 p += hexnumstr (p, addr);
3475 getpkt (&rs->buf, &rs->buf_size, 0);
3479 error (_("Remote failure reply: %s"), p);
3483 parse_static_tracepoint_marker_definition (p, NULL, marker);
3490 static VEC(static_tracepoint_marker_p) *
3491 remote_static_tracepoint_markers_by_strid (struct target_ops *self,
3494 struct remote_state *rs = get_remote_state ();
3495 VEC(static_tracepoint_marker_p) *markers = NULL;
3496 struct static_tracepoint_marker *marker = NULL;
3497 struct cleanup *old_chain;
3500 /* Ask for a first packet of static tracepoint marker
3503 getpkt (&rs->buf, &rs->buf_size, 0);
3506 error (_("Remote failure reply: %s"), p);
3508 old_chain = make_cleanup (free_current_marker, &marker);
3513 marker = XCNEW (struct static_tracepoint_marker);
3517 parse_static_tracepoint_marker_definition (p, &p, marker);
3519 if (strid == NULL || strcmp (strid, marker->str_id) == 0)
3521 VEC_safe_push (static_tracepoint_marker_p,
3527 release_static_tracepoint_marker (marker);
3528 memset (marker, 0, sizeof (*marker));
3531 while (*p++ == ','); /* comma-separated list */
3532 /* Ask for another packet of static tracepoint definition. */
3534 getpkt (&rs->buf, &rs->buf_size, 0);
3538 do_cleanups (old_chain);
3543 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3546 remote_get_ada_task_ptid (struct target_ops *self, long lwp, long thread)
3548 return ptid_build (ptid_get_pid (inferior_ptid), lwp, 0);
3552 /* Restart the remote side; this is an extended protocol operation. */
3555 extended_remote_restart (void)
3557 struct remote_state *rs = get_remote_state ();
3559 /* Send the restart command; for reasons I don't understand the
3560 remote side really expects a number after the "R". */
3561 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
3564 remote_fileio_reset ();
3567 /* Clean up connection to a remote debugger. */
3570 remote_close (struct target_ops *self)
3572 struct remote_state *rs = get_remote_state ();
3574 if (rs->remote_desc == NULL)
3575 return; /* already closed */
3577 /* Make sure we leave stdin registered in the event loop. */
3578 remote_terminal_ours (self);
3580 serial_close (rs->remote_desc);
3581 rs->remote_desc = NULL;
3583 /* We don't have a connection to the remote stub anymore. Get rid
3584 of all the inferiors and their threads we were controlling.
3585 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3586 will be unable to find the thread corresponding to (pid, 0, 0). */
3587 inferior_ptid = null_ptid;
3588 discard_all_inferiors ();
3590 /* We are closing the remote target, so we should discard
3591 everything of this target. */
3592 discard_pending_stop_replies_in_queue (rs);
3594 if (remote_async_inferior_event_token)
3595 delete_async_event_handler (&remote_async_inferior_event_token);
3597 remote_notif_state_xfree (rs->notif_state);
3599 trace_reset_local_state ();
3602 /* Query the remote side for the text, data and bss offsets. */
3607 struct remote_state *rs = get_remote_state ();
3610 int lose, num_segments = 0, do_sections, do_segments;
3611 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
3612 struct section_offsets *offs;
3613 struct symfile_segment_data *data;
3615 if (symfile_objfile == NULL)
3618 putpkt ("qOffsets");
3619 getpkt (&rs->buf, &rs->buf_size, 0);
3622 if (buf[0] == '\000')
3623 return; /* Return silently. Stub doesn't support
3627 warning (_("Remote failure reply: %s"), buf);
3631 /* Pick up each field in turn. This used to be done with scanf, but
3632 scanf will make trouble if CORE_ADDR size doesn't match
3633 conversion directives correctly. The following code will work
3634 with any size of CORE_ADDR. */
3635 text_addr = data_addr = bss_addr = 0;
3639 if (startswith (ptr, "Text="))
3642 /* Don't use strtol, could lose on big values. */
3643 while (*ptr && *ptr != ';')
3644 text_addr = (text_addr << 4) + fromhex (*ptr++);
3646 if (startswith (ptr, ";Data="))
3649 while (*ptr && *ptr != ';')
3650 data_addr = (data_addr << 4) + fromhex (*ptr++);
3655 if (!lose && startswith (ptr, ";Bss="))
3658 while (*ptr && *ptr != ';')
3659 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
3661 if (bss_addr != data_addr)
3662 warning (_("Target reported unsupported offsets: %s"), buf);
3667 else if (startswith (ptr, "TextSeg="))
3670 /* Don't use strtol, could lose on big values. */
3671 while (*ptr && *ptr != ';')
3672 text_addr = (text_addr << 4) + fromhex (*ptr++);
3675 if (startswith (ptr, ";DataSeg="))
3678 while (*ptr && *ptr != ';')
3679 data_addr = (data_addr << 4) + fromhex (*ptr++);
3687 error (_("Malformed response to offset query, %s"), buf);
3688 else if (*ptr != '\0')
3689 warning (_("Target reported unsupported offsets: %s"), buf);
3691 offs = ((struct section_offsets *)
3692 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
3693 memcpy (offs, symfile_objfile->section_offsets,
3694 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
3696 data = get_symfile_segment_data (symfile_objfile->obfd);
3697 do_segments = (data != NULL);
3698 do_sections = num_segments == 0;
3700 if (num_segments > 0)
3702 segments[0] = text_addr;
3703 segments[1] = data_addr;
3705 /* If we have two segments, we can still try to relocate everything
3706 by assuming that the .text and .data offsets apply to the whole
3707 text and data segments. Convert the offsets given in the packet
3708 to base addresses for symfile_map_offsets_to_segments. */
3709 else if (data && data->num_segments == 2)
3711 segments[0] = data->segment_bases[0] + text_addr;
3712 segments[1] = data->segment_bases[1] + data_addr;
3715 /* If the object file has only one segment, assume that it is text
3716 rather than data; main programs with no writable data are rare,
3717 but programs with no code are useless. Of course the code might
3718 have ended up in the data segment... to detect that we would need
3719 the permissions here. */
3720 else if (data && data->num_segments == 1)
3722 segments[0] = data->segment_bases[0] + text_addr;
3725 /* There's no way to relocate by segment. */
3731 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
3732 offs, num_segments, segments);
3734 if (ret == 0 && !do_sections)
3735 error (_("Can not handle qOffsets TextSeg "
3736 "response with this symbol file"));
3743 free_symfile_segment_data (data);
3747 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
3749 /* This is a temporary kludge to force data and bss to use the
3750 same offsets because that's what nlmconv does now. The real
3751 solution requires changes to the stub and remote.c that I
3752 don't have time to do right now. */
3754 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
3755 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
3758 objfile_relocate (symfile_objfile, offs);
3761 /* Send interrupt_sequence to remote target. */
3763 send_interrupt_sequence (void)
3765 struct remote_state *rs = get_remote_state ();
3767 if (interrupt_sequence_mode == interrupt_sequence_control_c)
3768 remote_serial_write ("\x03", 1);
3769 else if (interrupt_sequence_mode == interrupt_sequence_break)
3770 serial_send_break (rs->remote_desc);
3771 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
3773 serial_send_break (rs->remote_desc);
3774 remote_serial_write ("g", 1);
3777 internal_error (__FILE__, __LINE__,
3778 _("Invalid value for interrupt_sequence_mode: %s."),
3779 interrupt_sequence_mode);
3783 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3784 and extract the PTID. Returns NULL_PTID if not found. */
3787 stop_reply_extract_thread (char *stop_reply)
3789 if (stop_reply[0] == 'T' && strlen (stop_reply) > 3)
3793 /* Txx r:val ; r:val (...) */
3796 /* Look for "register" named "thread". */
3801 p1 = strchr (p, ':');
3805 if (strncmp (p, "thread", p1 - p) == 0)
3806 return read_ptid (++p1, &p);
3808 p1 = strchr (p, ';');
3820 /* Determine the remote side's current thread. If we have a stop
3821 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3822 "thread" register we can extract the current thread from. If not,
3823 ask the remote which is the current thread with qC. The former
3824 method avoids a roundtrip. */
3827 get_current_thread (char *wait_status)
3829 ptid_t ptid = null_ptid;
3831 /* Note we don't use remote_parse_stop_reply as that makes use of
3832 the target architecture, which we haven't yet fully determined at
3834 if (wait_status != NULL)
3835 ptid = stop_reply_extract_thread (wait_status);
3836 if (ptid_equal (ptid, null_ptid))
3837 ptid = remote_current_thread (inferior_ptid);
3842 /* Query the remote target for which is the current thread/process,
3843 add it to our tables, and update INFERIOR_PTID. The caller is
3844 responsible for setting the state such that the remote end is ready
3845 to return the current thread.
3847 This function is called after handling the '?' or 'vRun' packets,
3848 whose response is a stop reply from which we can also try
3849 extracting the thread. If the target doesn't support the explicit
3850 qC query, we infer the current thread from that stop reply, passed
3851 in in WAIT_STATUS, which may be NULL. */
3854 add_current_inferior_and_thread (char *wait_status)
3856 struct remote_state *rs = get_remote_state ();
3859 inferior_ptid = null_ptid;
3861 /* Now, if we have thread information, update inferior_ptid. */
3862 ptid_t curr_ptid = get_current_thread (wait_status);
3864 if (curr_ptid != null_ptid)
3866 if (!remote_multi_process_p (rs))
3871 /* Without this, some commands which require an active target
3872 (such as kill) won't work. This variable serves (at least)
3873 double duty as both the pid of the target process (if it has
3874 such), and as a flag indicating that a target is active. */
3875 curr_ptid = magic_null_ptid;
3879 remote_add_inferior (fake_pid_p, ptid_get_pid (curr_ptid), -1, 1);
3881 /* Add the main thread and switch to it. Don't try reading
3882 registers yet, since we haven't fetched the target description
3884 thread_info *tp = add_thread_silent (curr_ptid);
3885 switch_to_thread_no_regs (tp);
3888 /* Print info about a thread that was found already stopped on
3892 print_one_stopped_thread (struct thread_info *thread)
3894 struct target_waitstatus *ws = &thread->suspend.waitstatus;
3896 switch_to_thread (thread->ptid);
3897 stop_pc = get_frame_pc (get_current_frame ());
3898 set_current_sal_from_frame (get_current_frame ());
3900 thread->suspend.waitstatus_pending_p = 0;
3902 if (ws->kind == TARGET_WAITKIND_STOPPED)
3904 enum gdb_signal sig = ws->value.sig;
3906 if (signal_print_state (sig))
3907 observer_notify_signal_received (sig);
3909 observer_notify_normal_stop (NULL, 1);
3912 /* Process all initial stop replies the remote side sent in response
3913 to the ? packet. These indicate threads that were already stopped
3914 on initial connection. We mark these threads as stopped and print
3915 their current frame before giving the user the prompt. */
3918 process_initial_stop_replies (int from_tty)
3920 int pending_stop_replies = stop_reply_queue_length ();
3921 struct inferior *inf;
3922 struct thread_info *thread;
3923 struct thread_info *selected = NULL;
3924 struct thread_info *lowest_stopped = NULL;
3925 struct thread_info *first = NULL;
3927 /* Consume the initial pending events. */
3928 while (pending_stop_replies-- > 0)
3930 ptid_t waiton_ptid = minus_one_ptid;
3932 struct target_waitstatus ws;
3933 int ignore_event = 0;
3934 struct thread_info *thread;
3936 memset (&ws, 0, sizeof (ws));
3937 event_ptid = target_wait (waiton_ptid, &ws, TARGET_WNOHANG);
3939 print_target_wait_results (waiton_ptid, event_ptid, &ws);
3943 case TARGET_WAITKIND_IGNORE:
3944 case TARGET_WAITKIND_NO_RESUMED:
3945 case TARGET_WAITKIND_SIGNALLED:
3946 case TARGET_WAITKIND_EXITED:
3947 /* We shouldn't see these, but if we do, just ignore. */
3949 fprintf_unfiltered (gdb_stdlog, "remote: event ignored\n");
3953 case TARGET_WAITKIND_EXECD:
3954 xfree (ws.value.execd_pathname);
3963 thread = find_thread_ptid (event_ptid);
3965 if (ws.kind == TARGET_WAITKIND_STOPPED)
3967 enum gdb_signal sig = ws.value.sig;
3969 /* Stubs traditionally report SIGTRAP as initial signal,
3970 instead of signal 0. Suppress it. */
3971 if (sig == GDB_SIGNAL_TRAP)
3973 thread->suspend.stop_signal = sig;
3977 thread->suspend.waitstatus = ws;
3979 if (ws.kind != TARGET_WAITKIND_STOPPED
3980 || ws.value.sig != GDB_SIGNAL_0)
3981 thread->suspend.waitstatus_pending_p = 1;
3983 set_executing (event_ptid, 0);
3984 set_running (event_ptid, 0);
3985 thread->priv->vcont_resumed = 0;
3988 /* "Notice" the new inferiors before anything related to
3989 registers/memory. */
3995 inf->needs_setup = 1;
3999 thread = any_live_thread_of_process (inf->pid);
4000 notice_new_inferior (thread->ptid,
4001 thread->state == THREAD_RUNNING,
4006 /* If all-stop on top of non-stop, pause all threads. Note this
4007 records the threads' stop pc, so must be done after "noticing"
4011 stop_all_threads ();
4013 /* If all threads of an inferior were already stopped, we
4014 haven't setup the inferior yet. */
4020 if (inf->needs_setup)
4022 thread = any_live_thread_of_process (inf->pid);
4023 switch_to_thread_no_regs (thread);
4029 /* Now go over all threads that are stopped, and print their current
4030 frame. If all-stop, then if there's a signalled thread, pick
4032 ALL_NON_EXITED_THREADS (thread)
4038 set_running (thread->ptid, 0);
4039 else if (thread->state != THREAD_STOPPED)
4042 if (selected == NULL
4043 && thread->suspend.waitstatus_pending_p)
4046 if (lowest_stopped == NULL
4047 || thread->inf->num < lowest_stopped->inf->num
4048 || thread->per_inf_num < lowest_stopped->per_inf_num)
4049 lowest_stopped = thread;
4052 print_one_stopped_thread (thread);
4055 /* In all-stop, we only print the status of one thread, and leave
4056 others with their status pending. */
4061 thread = lowest_stopped;
4065 print_one_stopped_thread (thread);
4068 /* For "info program". */
4069 thread = inferior_thread ();
4070 if (thread->state == THREAD_STOPPED)
4071 set_last_target_status (inferior_ptid, thread->suspend.waitstatus);
4074 /* Start the remote connection and sync state. */
4077 remote_start_remote (int from_tty, struct target_ops *target, int extended_p)
4079 struct remote_state *rs = get_remote_state ();
4080 struct packet_config *noack_config;
4081 char *wait_status = NULL;
4083 /* Signal other parts that we're going through the initial setup,
4084 and so things may not be stable yet. E.g., we don't try to
4085 install tracepoints until we've relocated symbols. Also, a
4086 Ctrl-C before we're connected and synced up can't interrupt the
4087 target. Instead, it offers to drop the (potentially wedged)
4089 rs->starting_up = 1;
4093 if (interrupt_on_connect)
4094 send_interrupt_sequence ();
4096 /* Ack any packet which the remote side has already sent. */
4097 remote_serial_write ("+", 1);
4099 /* The first packet we send to the target is the optional "supported
4100 packets" request. If the target can answer this, it will tell us
4101 which later probes to skip. */
4102 remote_query_supported ();
4104 /* If the stub wants to get a QAllow, compose one and send it. */
4105 if (packet_support (PACKET_QAllow) != PACKET_DISABLE)
4106 remote_set_permissions (target);
4108 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4109 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4110 as a reply to known packet. For packet "vFile:setfs:" it is an
4111 invalid reply and GDB would return error in
4112 remote_hostio_set_filesystem, making remote files access impossible.
4113 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4114 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4116 const char v_mustreplyempty[] = "vMustReplyEmpty";
4118 putpkt (v_mustreplyempty);
4119 getpkt (&rs->buf, &rs->buf_size, 0);
4120 if (strcmp (rs->buf, "OK") == 0)
4121 remote_protocol_packets[PACKET_vFile_setfs].support = PACKET_DISABLE;
4122 else if (strcmp (rs->buf, "") != 0)
4123 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty,
4127 /* Next, we possibly activate noack mode.
4129 If the QStartNoAckMode packet configuration is set to AUTO,
4130 enable noack mode if the stub reported a wish for it with
4133 If set to TRUE, then enable noack mode even if the stub didn't
4134 report it in qSupported. If the stub doesn't reply OK, the
4135 session ends with an error.
4137 If FALSE, then don't activate noack mode, regardless of what the
4138 stub claimed should be the default with qSupported. */
4140 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
4141 if (packet_config_support (noack_config) != PACKET_DISABLE)
4143 putpkt ("QStartNoAckMode");
4144 getpkt (&rs->buf, &rs->buf_size, 0);
4145 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
4151 /* Tell the remote that we are using the extended protocol. */
4153 getpkt (&rs->buf, &rs->buf_size, 0);
4156 /* Let the target know which signals it is allowed to pass down to
4158 update_signals_program_target ();
4160 /* Next, if the target can specify a description, read it. We do
4161 this before anything involving memory or registers. */
4162 target_find_description ();
4164 /* Next, now that we know something about the target, update the
4165 address spaces in the program spaces. */
4166 update_address_spaces ();
4168 /* On OSs where the list of libraries is global to all
4169 processes, we fetch them early. */
4170 if (gdbarch_has_global_solist (target_gdbarch ()))
4171 solib_add (NULL, from_tty, auto_solib_add);
4173 if (target_is_non_stop_p ())
4175 if (packet_support (PACKET_QNonStop) != PACKET_ENABLE)
4176 error (_("Non-stop mode requested, but remote "
4177 "does not support non-stop"));
4179 putpkt ("QNonStop:1");
4180 getpkt (&rs->buf, &rs->buf_size, 0);
4182 if (strcmp (rs->buf, "OK") != 0)
4183 error (_("Remote refused setting non-stop mode with: %s"), rs->buf);
4185 /* Find about threads and processes the stub is already
4186 controlling. We default to adding them in the running state.
4187 The '?' query below will then tell us about which threads are
4189 remote_update_thread_list (target);
4191 else if (packet_support (PACKET_QNonStop) == PACKET_ENABLE)
4193 /* Don't assume that the stub can operate in all-stop mode.
4194 Request it explicitly. */
4195 putpkt ("QNonStop:0");
4196 getpkt (&rs->buf, &rs->buf_size, 0);
4198 if (strcmp (rs->buf, "OK") != 0)
4199 error (_("Remote refused setting all-stop mode with: %s"), rs->buf);
4202 /* Upload TSVs regardless of whether the target is running or not. The
4203 remote stub, such as GDBserver, may have some predefined or builtin
4204 TSVs, even if the target is not running. */
4205 if (remote_get_trace_status (target, current_trace_status ()) != -1)
4207 struct uploaded_tsv *uploaded_tsvs = NULL;
4209 remote_upload_trace_state_variables (target, &uploaded_tsvs);
4210 merge_uploaded_trace_state_variables (&uploaded_tsvs);
4213 /* Check whether the target is running now. */
4215 getpkt (&rs->buf, &rs->buf_size, 0);
4217 if (!target_is_non_stop_p ())
4219 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
4222 error (_("The target is not running (try extended-remote?)"));
4224 /* We're connected, but not running. Drop out before we
4225 call start_remote. */
4226 rs->starting_up = 0;
4231 /* Save the reply for later. */
4232 wait_status = (char *) alloca (strlen (rs->buf) + 1);
4233 strcpy (wait_status, rs->buf);
4236 /* Fetch thread list. */
4237 target_update_thread_list ();
4239 /* Let the stub know that we want it to return the thread. */
4240 set_continue_thread (minus_one_ptid);
4242 if (thread_count () == 0)
4244 /* Target has no concept of threads at all. GDB treats
4245 non-threaded target as single-threaded; add a main
4247 add_current_inferior_and_thread (wait_status);
4251 /* We have thread information; select the thread the target
4252 says should be current. If we're reconnecting to a
4253 multi-threaded program, this will ideally be the thread
4254 that last reported an event before GDB disconnected. */
4255 inferior_ptid = get_current_thread (wait_status);
4256 if (ptid_equal (inferior_ptid, null_ptid))
4258 /* Odd... The target was able to list threads, but not
4259 tell us which thread was current (no "thread"
4260 register in T stop reply?). Just pick the first
4261 thread in the thread list then. */
4264 fprintf_unfiltered (gdb_stdlog,
4265 "warning: couldn't determine remote "
4266 "current thread; picking first in list.\n");
4268 inferior_ptid = thread_list->ptid;
4272 /* init_wait_for_inferior should be called before get_offsets in order
4273 to manage `inserted' flag in bp loc in a correct state.
4274 breakpoint_init_inferior, called from init_wait_for_inferior, set
4275 `inserted' flag to 0, while before breakpoint_re_set, called from
4276 start_remote, set `inserted' flag to 1. In the initialization of
4277 inferior, breakpoint_init_inferior should be called first, and then
4278 breakpoint_re_set can be called. If this order is broken, state of
4279 `inserted' flag is wrong, and cause some problems on breakpoint
4281 init_wait_for_inferior ();
4283 get_offsets (); /* Get text, data & bss offsets. */
4285 /* If we could not find a description using qXfer, and we know
4286 how to do it some other way, try again. This is not
4287 supported for non-stop; it could be, but it is tricky if
4288 there are no stopped threads when we connect. */
4289 if (remote_read_description_p (target)
4290 && gdbarch_target_desc (target_gdbarch ()) == NULL)
4292 target_clear_description ();
4293 target_find_description ();
4296 /* Use the previously fetched status. */
4297 gdb_assert (wait_status != NULL);
4298 strcpy (rs->buf, wait_status);
4299 rs->cached_wait_status = 1;
4301 start_remote (from_tty); /* Initialize gdb process mechanisms. */
4305 /* Clear WFI global state. Do this before finding about new
4306 threads and inferiors, and setting the current inferior.
4307 Otherwise we would clear the proceed status of the current
4308 inferior when we want its stop_soon state to be preserved
4309 (see notice_new_inferior). */
4310 init_wait_for_inferior ();
4312 /* In non-stop, we will either get an "OK", meaning that there
4313 are no stopped threads at this time; or, a regular stop
4314 reply. In the latter case, there may be more than one thread
4315 stopped --- we pull them all out using the vStopped
4317 if (strcmp (rs->buf, "OK") != 0)
4319 struct notif_client *notif = ¬if_client_stop;
4321 /* remote_notif_get_pending_replies acks this one, and gets
4323 rs->notif_state->pending_event[notif_client_stop.id]
4324 = remote_notif_parse (notif, rs->buf);
4325 remote_notif_get_pending_events (notif);
4328 if (thread_count () == 0)
4331 error (_("The target is not running (try extended-remote?)"));
4333 /* We're connected, but not running. Drop out before we
4334 call start_remote. */
4335 rs->starting_up = 0;
4339 /* In non-stop mode, any cached wait status will be stored in
4340 the stop reply queue. */
4341 gdb_assert (wait_status == NULL);
4343 /* Report all signals during attach/startup. */
4344 remote_pass_signals (target, 0, NULL);
4346 /* If there are already stopped threads, mark them stopped and
4347 report their stops before giving the prompt to the user. */
4348 process_initial_stop_replies (from_tty);
4350 if (target_can_async_p ())
4354 /* If we connected to a live target, do some additional setup. */
4355 if (target_has_execution)
4357 if (symfile_objfile) /* No use without a symbol-file. */
4358 remote_check_symbols ();
4361 /* Possibly the target has been engaged in a trace run started
4362 previously; find out where things are at. */
4363 if (remote_get_trace_status (target, current_trace_status ()) != -1)
4365 struct uploaded_tp *uploaded_tps = NULL;
4367 if (current_trace_status ()->running)
4368 printf_filtered (_("Trace is already running on the target.\n"));
4370 remote_upload_tracepoints (target, &uploaded_tps);
4372 merge_uploaded_tracepoints (&uploaded_tps);
4375 /* Possibly the target has been engaged in a btrace record started
4376 previously; find out where things are at. */
4377 remote_btrace_maybe_reopen ();
4379 /* The thread and inferior lists are now synchronized with the
4380 target, our symbols have been relocated, and we're merged the
4381 target's tracepoints with ours. We're done with basic start
4383 rs->starting_up = 0;
4385 /* Maybe breakpoints are global and need to be inserted now. */
4386 if (breakpoints_should_be_inserted_now ())
4387 insert_breakpoints ();
4390 /* Open a connection to a remote debugger.
4391 NAME is the filename used for communication. */
4394 remote_open (const char *name, int from_tty)
4396 remote_open_1 (name, from_tty, &remote_ops, 0);
4399 /* Open a connection to a remote debugger using the extended
4400 remote gdb protocol. NAME is the filename used for communication. */
4403 extended_remote_open (const char *name, int from_tty)
4405 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
4408 /* Reset all packets back to "unknown support". Called when opening a
4409 new connection to a remote target. */
4412 reset_all_packet_configs_support (void)
4416 for (i = 0; i < PACKET_MAX; i++)
4417 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
4420 /* Initialize all packet configs. */
4423 init_all_packet_configs (void)
4427 for (i = 0; i < PACKET_MAX; i++)
4429 remote_protocol_packets[i].detect = AUTO_BOOLEAN_AUTO;
4430 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
4434 /* Symbol look-up. */
4437 remote_check_symbols (void)
4439 struct remote_state *rs = get_remote_state ();
4440 char *msg, *reply, *tmp;
4443 struct cleanup *old_chain;
4445 /* The remote side has no concept of inferiors that aren't running
4446 yet, it only knows about running processes. If we're connected
4447 but our current inferior is not running, we should not invite the
4448 remote target to request symbol lookups related to its
4449 (unrelated) current process. */
4450 if (!target_has_execution)
4453 if (packet_support (PACKET_qSymbol) == PACKET_DISABLE)
4456 /* Make sure the remote is pointing at the right process. Note
4457 there's no way to select "no process". */
4458 set_general_process ();
4460 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4461 because we need both at the same time. */
4462 msg = (char *) xmalloc (get_remote_packet_size ());
4463 old_chain = make_cleanup (xfree, msg);
4464 reply = (char *) xmalloc (get_remote_packet_size ());
4465 make_cleanup (free_current_contents, &reply);
4466 reply_size = get_remote_packet_size ();
4468 /* Invite target to request symbol lookups. */
4470 putpkt ("qSymbol::");
4471 getpkt (&reply, &reply_size, 0);
4472 packet_ok (reply, &remote_protocol_packets[PACKET_qSymbol]);
4474 while (startswith (reply, "qSymbol:"))
4476 struct bound_minimal_symbol sym;
4479 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
4481 sym = lookup_minimal_symbol (msg, NULL, NULL);
4482 if (sym.minsym == NULL)
4483 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
4486 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
4487 CORE_ADDR sym_addr = BMSYMBOL_VALUE_ADDRESS (sym);
4489 /* If this is a function address, return the start of code
4490 instead of any data function descriptor. */
4491 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4495 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
4496 phex_nz (sym_addr, addr_size), &reply[8]);
4500 getpkt (&reply, &reply_size, 0);
4503 do_cleanups (old_chain);
4506 static struct serial *
4507 remote_serial_open (const char *name)
4509 static int udp_warning = 0;
4511 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4512 of in ser-tcp.c, because it is the remote protocol assuming that the
4513 serial connection is reliable and not the serial connection promising
4515 if (!udp_warning && startswith (name, "udp:"))
4517 warning (_("The remote protocol may be unreliable over UDP.\n"
4518 "Some events may be lost, rendering further debugging "
4523 return serial_open (name);
4526 /* Inform the target of our permission settings. The permission flags
4527 work without this, but if the target knows the settings, it can do
4528 a couple things. First, it can add its own check, to catch cases
4529 that somehow manage to get by the permissions checks in target
4530 methods. Second, if the target is wired to disallow particular
4531 settings (for instance, a system in the field that is not set up to
4532 be able to stop at a breakpoint), it can object to any unavailable
4536 remote_set_permissions (struct target_ops *self)
4538 struct remote_state *rs = get_remote_state ();
4540 xsnprintf (rs->buf, get_remote_packet_size (), "QAllow:"
4541 "WriteReg:%x;WriteMem:%x;"
4542 "InsertBreak:%x;InsertTrace:%x;"
4543 "InsertFastTrace:%x;Stop:%x",
4544 may_write_registers, may_write_memory,
4545 may_insert_breakpoints, may_insert_tracepoints,
4546 may_insert_fast_tracepoints, may_stop);
4548 getpkt (&rs->buf, &rs->buf_size, 0);
4550 /* If the target didn't like the packet, warn the user. Do not try
4551 to undo the user's settings, that would just be maddening. */
4552 if (strcmp (rs->buf, "OK") != 0)
4553 warning (_("Remote refused setting permissions with: %s"), rs->buf);
4556 /* This type describes each known response to the qSupported
4558 struct protocol_feature
4560 /* The name of this protocol feature. */
4563 /* The default for this protocol feature. */
4564 enum packet_support default_support;
4566 /* The function to call when this feature is reported, or after
4567 qSupported processing if the feature is not supported.
4568 The first argument points to this structure. The second
4569 argument indicates whether the packet requested support be
4570 enabled, disabled, or probed (or the default, if this function
4571 is being called at the end of processing and this feature was
4572 not reported). The third argument may be NULL; if not NULL, it
4573 is a NUL-terminated string taken from the packet following
4574 this feature's name and an equals sign. */
4575 void (*func) (const struct protocol_feature *, enum packet_support,
4578 /* The corresponding packet for this feature. Only used if
4579 FUNC is remote_supported_packet. */
4584 remote_supported_packet (const struct protocol_feature *feature,
4585 enum packet_support support,
4586 const char *argument)
4590 warning (_("Remote qSupported response supplied an unexpected value for"
4591 " \"%s\"."), feature->name);
4595 remote_protocol_packets[feature->packet].support = support;
4599 remote_packet_size (const struct protocol_feature *feature,
4600 enum packet_support support, const char *value)
4602 struct remote_state *rs = get_remote_state ();
4607 if (support != PACKET_ENABLE)
4610 if (value == NULL || *value == '\0')
4612 warning (_("Remote target reported \"%s\" without a size."),
4618 packet_size = strtol (value, &value_end, 16);
4619 if (errno != 0 || *value_end != '\0' || packet_size < 0)
4621 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4622 feature->name, value);
4626 /* Record the new maximum packet size. */
4627 rs->explicit_packet_size = packet_size;
4630 static const struct protocol_feature remote_protocol_features[] = {
4631 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
4632 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
4633 PACKET_qXfer_auxv },
4634 { "qXfer:exec-file:read", PACKET_DISABLE, remote_supported_packet,
4635 PACKET_qXfer_exec_file },
4636 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
4637 PACKET_qXfer_features },
4638 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
4639 PACKET_qXfer_libraries },
4640 { "qXfer:libraries-svr4:read", PACKET_DISABLE, remote_supported_packet,
4641 PACKET_qXfer_libraries_svr4 },
4642 { "augmented-libraries-svr4-read", PACKET_DISABLE,
4643 remote_supported_packet, PACKET_augmented_libraries_svr4_read_feature },
4644 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
4645 PACKET_qXfer_memory_map },
4646 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
4647 PACKET_qXfer_spu_read },
4648 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
4649 PACKET_qXfer_spu_write },
4650 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
4651 PACKET_qXfer_osdata },
4652 { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet,
4653 PACKET_qXfer_threads },
4654 { "qXfer:traceframe-info:read", PACKET_DISABLE, remote_supported_packet,
4655 PACKET_qXfer_traceframe_info },
4656 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
4657 PACKET_QPassSignals },
4658 { "QCatchSyscalls", PACKET_DISABLE, remote_supported_packet,
4659 PACKET_QCatchSyscalls },
4660 { "QProgramSignals", PACKET_DISABLE, remote_supported_packet,
4661 PACKET_QProgramSignals },
4662 { "QSetWorkingDir", PACKET_DISABLE, remote_supported_packet,
4663 PACKET_QSetWorkingDir },
4664 { "QStartupWithShell", PACKET_DISABLE, remote_supported_packet,
4665 PACKET_QStartupWithShell },
4666 { "QEnvironmentHexEncoded", PACKET_DISABLE, remote_supported_packet,
4667 PACKET_QEnvironmentHexEncoded },
4668 { "QEnvironmentReset", PACKET_DISABLE, remote_supported_packet,
4669 PACKET_QEnvironmentReset },
4670 { "QEnvironmentUnset", PACKET_DISABLE, remote_supported_packet,
4671 PACKET_QEnvironmentUnset },
4672 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
4673 PACKET_QStartNoAckMode },
4674 { "multiprocess", PACKET_DISABLE, remote_supported_packet,
4675 PACKET_multiprocess_feature },
4676 { "QNonStop", PACKET_DISABLE, remote_supported_packet, PACKET_QNonStop },
4677 { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
4678 PACKET_qXfer_siginfo_read },
4679 { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
4680 PACKET_qXfer_siginfo_write },
4681 { "ConditionalTracepoints", PACKET_DISABLE, remote_supported_packet,
4682 PACKET_ConditionalTracepoints },
4683 { "ConditionalBreakpoints", PACKET_DISABLE, remote_supported_packet,
4684 PACKET_ConditionalBreakpoints },
4685 { "BreakpointCommands", PACKET_DISABLE, remote_supported_packet,
4686 PACKET_BreakpointCommands },
4687 { "FastTracepoints", PACKET_DISABLE, remote_supported_packet,
4688 PACKET_FastTracepoints },
4689 { "StaticTracepoints", PACKET_DISABLE, remote_supported_packet,
4690 PACKET_StaticTracepoints },
4691 {"InstallInTrace", PACKET_DISABLE, remote_supported_packet,
4692 PACKET_InstallInTrace},
4693 { "DisconnectedTracing", PACKET_DISABLE, remote_supported_packet,
4694 PACKET_DisconnectedTracing_feature },
4695 { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
4697 { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
4699 { "TracepointSource", PACKET_DISABLE, remote_supported_packet,
4700 PACKET_TracepointSource },
4701 { "QAllow", PACKET_DISABLE, remote_supported_packet,
4703 { "EnableDisableTracepoints", PACKET_DISABLE, remote_supported_packet,
4704 PACKET_EnableDisableTracepoints_feature },
4705 { "qXfer:fdpic:read", PACKET_DISABLE, remote_supported_packet,
4706 PACKET_qXfer_fdpic },
4707 { "qXfer:uib:read", PACKET_DISABLE, remote_supported_packet,
4709 { "QDisableRandomization", PACKET_DISABLE, remote_supported_packet,
4710 PACKET_QDisableRandomization },
4711 { "QAgent", PACKET_DISABLE, remote_supported_packet, PACKET_QAgent},
4712 { "QTBuffer:size", PACKET_DISABLE,
4713 remote_supported_packet, PACKET_QTBuffer_size},
4714 { "tracenz", PACKET_DISABLE, remote_supported_packet, PACKET_tracenz_feature },
4715 { "Qbtrace:off", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_off },
4716 { "Qbtrace:bts", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_bts },
4717 { "Qbtrace:pt", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_pt },
4718 { "qXfer:btrace:read", PACKET_DISABLE, remote_supported_packet,
4719 PACKET_qXfer_btrace },
4720 { "qXfer:btrace-conf:read", PACKET_DISABLE, remote_supported_packet,
4721 PACKET_qXfer_btrace_conf },
4722 { "Qbtrace-conf:bts:size", PACKET_DISABLE, remote_supported_packet,
4723 PACKET_Qbtrace_conf_bts_size },
4724 { "swbreak", PACKET_DISABLE, remote_supported_packet, PACKET_swbreak_feature },
4725 { "hwbreak", PACKET_DISABLE, remote_supported_packet, PACKET_hwbreak_feature },
4726 { "fork-events", PACKET_DISABLE, remote_supported_packet,
4727 PACKET_fork_event_feature },
4728 { "vfork-events", PACKET_DISABLE, remote_supported_packet,
4729 PACKET_vfork_event_feature },
4730 { "exec-events", PACKET_DISABLE, remote_supported_packet,
4731 PACKET_exec_event_feature },
4732 { "Qbtrace-conf:pt:size", PACKET_DISABLE, remote_supported_packet,
4733 PACKET_Qbtrace_conf_pt_size },
4734 { "vContSupported", PACKET_DISABLE, remote_supported_packet, PACKET_vContSupported },
4735 { "QThreadEvents", PACKET_DISABLE, remote_supported_packet, PACKET_QThreadEvents },
4736 { "no-resumed", PACKET_DISABLE, remote_supported_packet, PACKET_no_resumed },
4739 static char *remote_support_xml;
4741 /* Register string appended to "xmlRegisters=" in qSupported query. */
4744 register_remote_support_xml (const char *xml)
4746 #if defined(HAVE_LIBEXPAT)
4747 if (remote_support_xml == NULL)
4748 remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL);
4751 char *copy = xstrdup (remote_support_xml + 13);
4752 char *p = strtok (copy, ",");
4756 if (strcmp (p, xml) == 0)
4763 while ((p = strtok (NULL, ",")) != NULL);
4766 remote_support_xml = reconcat (remote_support_xml,
4767 remote_support_xml, ",", xml,
4774 remote_query_supported_append (char *msg, const char *append)
4777 return reconcat (msg, msg, ";", append, (char *) NULL);
4779 return xstrdup (append);
4783 remote_query_supported (void)
4785 struct remote_state *rs = get_remote_state ();
4788 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
4790 /* The packet support flags are handled differently for this packet
4791 than for most others. We treat an error, a disabled packet, and
4792 an empty response identically: any features which must be reported
4793 to be used will be automatically disabled. An empty buffer
4794 accomplishes this, since that is also the representation for a list
4795 containing no features. */
4798 if (packet_support (PACKET_qSupported) != PACKET_DISABLE)
4801 struct cleanup *old_chain = make_cleanup (free_current_contents, &q);
4803 if (packet_set_cmd_state (PACKET_multiprocess_feature) != AUTO_BOOLEAN_FALSE)
4804 q = remote_query_supported_append (q, "multiprocess+");
4806 if (packet_set_cmd_state (PACKET_swbreak_feature) != AUTO_BOOLEAN_FALSE)
4807 q = remote_query_supported_append (q, "swbreak+");
4808 if (packet_set_cmd_state (PACKET_hwbreak_feature) != AUTO_BOOLEAN_FALSE)
4809 q = remote_query_supported_append (q, "hwbreak+");
4811 q = remote_query_supported_append (q, "qRelocInsn+");
4813 if (packet_set_cmd_state (PACKET_fork_event_feature)
4814 != AUTO_BOOLEAN_FALSE)
4815 q = remote_query_supported_append (q, "fork-events+");
4816 if (packet_set_cmd_state (PACKET_vfork_event_feature)
4817 != AUTO_BOOLEAN_FALSE)
4818 q = remote_query_supported_append (q, "vfork-events+");
4819 if (packet_set_cmd_state (PACKET_exec_event_feature)
4820 != AUTO_BOOLEAN_FALSE)
4821 q = remote_query_supported_append (q, "exec-events+");
4823 if (packet_set_cmd_state (PACKET_vContSupported) != AUTO_BOOLEAN_FALSE)
4824 q = remote_query_supported_append (q, "vContSupported+");
4826 if (packet_set_cmd_state (PACKET_QThreadEvents) != AUTO_BOOLEAN_FALSE)
4827 q = remote_query_supported_append (q, "QThreadEvents+");
4829 if (packet_set_cmd_state (PACKET_no_resumed) != AUTO_BOOLEAN_FALSE)
4830 q = remote_query_supported_append (q, "no-resumed+");
4832 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4833 the qSupported:xmlRegisters=i386 handling. */
4834 if (remote_support_xml != NULL)
4835 q = remote_query_supported_append (q, remote_support_xml);
4837 q = reconcat (q, "qSupported:", q, (char *) NULL);
4840 do_cleanups (old_chain);
4842 getpkt (&rs->buf, &rs->buf_size, 0);
4844 /* If an error occured, warn, but do not return - just reset the
4845 buffer to empty and go on to disable features. */
4846 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
4849 warning (_("Remote failure reply: %s"), rs->buf);
4854 memset (seen, 0, sizeof (seen));
4859 enum packet_support is_supported;
4860 char *p, *end, *name_end, *value;
4862 /* First separate out this item from the rest of the packet. If
4863 there's another item after this, we overwrite the separator
4864 (terminated strings are much easier to work with). */
4866 end = strchr (p, ';');
4869 end = p + strlen (p);
4879 warning (_("empty item in \"qSupported\" response"));
4884 name_end = strchr (p, '=');
4887 /* This is a name=value entry. */
4888 is_supported = PACKET_ENABLE;
4889 value = name_end + 1;
4898 is_supported = PACKET_ENABLE;
4902 is_supported = PACKET_DISABLE;
4906 is_supported = PACKET_SUPPORT_UNKNOWN;
4910 warning (_("unrecognized item \"%s\" "
4911 "in \"qSupported\" response"), p);
4917 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4918 if (strcmp (remote_protocol_features[i].name, p) == 0)
4920 const struct protocol_feature *feature;
4923 feature = &remote_protocol_features[i];
4924 feature->func (feature, is_supported, value);
4929 /* If we increased the packet size, make sure to increase the global
4930 buffer size also. We delay this until after parsing the entire
4931 qSupported packet, because this is the same buffer we were
4933 if (rs->buf_size < rs->explicit_packet_size)
4935 rs->buf_size = rs->explicit_packet_size;
4936 rs->buf = (char *) xrealloc (rs->buf, rs->buf_size);
4939 /* Handle the defaults for unmentioned features. */
4940 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4943 const struct protocol_feature *feature;
4945 feature = &remote_protocol_features[i];
4946 feature->func (feature, feature->default_support, NULL);
4950 /* Serial QUIT handler for the remote serial descriptor.
4952 Defers handling a Ctrl-C until we're done with the current
4953 command/response packet sequence, unless:
4955 - We're setting up the connection. Don't send a remote interrupt
4956 request, as we're not fully synced yet. Quit immediately
4959 - The target has been resumed in the foreground
4960 (target_terminal::is_ours is false) with a synchronous resume
4961 packet, and we're blocked waiting for the stop reply, thus a
4962 Ctrl-C should be immediately sent to the target.
4964 - We get a second Ctrl-C while still within the same serial read or
4965 write. In that case the serial is seemingly wedged --- offer to
4968 - We see a second Ctrl-C without target response, after having
4969 previously interrupted the target. In that case the target/stub
4970 is probably wedged --- offer to quit/disconnect.
4974 remote_serial_quit_handler (void)
4976 struct remote_state *rs = get_remote_state ();
4978 if (check_quit_flag ())
4980 /* If we're starting up, we're not fully synced yet. Quit
4982 if (rs->starting_up)
4984 else if (rs->got_ctrlc_during_io)
4986 if (query (_("The target is not responding to GDB commands.\n"
4987 "Stop debugging it? ")))
4988 remote_unpush_and_throw ();
4990 /* If ^C has already been sent once, offer to disconnect. */
4991 else if (!target_terminal::is_ours () && rs->ctrlc_pending_p)
4993 /* All-stop protocol, and blocked waiting for stop reply. Send
4994 an interrupt request. */
4995 else if (!target_terminal::is_ours () && rs->waiting_for_stop_reply)
4996 target_interrupt (inferior_ptid);
4998 rs->got_ctrlc_during_io = 1;
5002 /* Remove any of the remote.c targets from target stack. Upper targets depend
5003 on it so remove them first. */
5006 remote_unpush_target (void)
5008 pop_all_targets_at_and_above (process_stratum);
5012 remote_unpush_and_throw (void)
5014 remote_unpush_target ();
5015 throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target."));
5019 remote_open_1 (const char *name, int from_tty,
5020 struct target_ops *target, int extended_p)
5022 struct remote_state *rs = get_remote_state ();
5025 error (_("To open a remote debug connection, you need to specify what\n"
5026 "serial device is attached to the remote system\n"
5027 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5029 /* See FIXME above. */
5030 if (!target_async_permitted)
5031 wait_forever_enabled_p = 1;
5033 /* If we're connected to a running target, target_preopen will kill it.
5034 Ask this question first, before target_preopen has a chance to kill
5036 if (rs->remote_desc != NULL && !have_inferiors ())
5039 && !query (_("Already connected to a remote target. Disconnect? ")))
5040 error (_("Still connected."));
5043 /* Here the possibly existing remote target gets unpushed. */
5044 target_preopen (from_tty);
5046 /* Make sure we send the passed signals list the next time we resume. */
5047 xfree (rs->last_pass_packet);
5048 rs->last_pass_packet = NULL;
5050 /* Make sure we send the program signals list the next time we
5052 xfree (rs->last_program_signals_packet);
5053 rs->last_program_signals_packet = NULL;
5055 remote_fileio_reset ();
5056 reopen_exec_file ();
5059 rs->remote_desc = remote_serial_open (name);
5060 if (!rs->remote_desc)
5061 perror_with_name (name);
5063 if (baud_rate != -1)
5065 if (serial_setbaudrate (rs->remote_desc, baud_rate))
5067 /* The requested speed could not be set. Error out to
5068 top level after closing remote_desc. Take care to
5069 set remote_desc to NULL to avoid closing remote_desc
5071 serial_close (rs->remote_desc);
5072 rs->remote_desc = NULL;
5073 perror_with_name (name);
5077 serial_setparity (rs->remote_desc, serial_parity);
5078 serial_raw (rs->remote_desc);
5080 /* If there is something sitting in the buffer we might take it as a
5081 response to a command, which would be bad. */
5082 serial_flush_input (rs->remote_desc);
5086 puts_filtered ("Remote debugging using ");
5087 puts_filtered (name);
5088 puts_filtered ("\n");
5090 push_target (target); /* Switch to using remote target now. */
5092 /* Register extra event sources in the event loop. */
5093 remote_async_inferior_event_token
5094 = create_async_event_handler (remote_async_inferior_event_handler,
5096 rs->notif_state = remote_notif_state_allocate ();
5098 /* Reset the target state; these things will be queried either by
5099 remote_query_supported or as they are needed. */
5100 reset_all_packet_configs_support ();
5101 rs->cached_wait_status = 0;
5102 rs->explicit_packet_size = 0;
5104 rs->extended = extended_p;
5105 rs->waiting_for_stop_reply = 0;
5106 rs->ctrlc_pending_p = 0;
5107 rs->got_ctrlc_during_io = 0;
5109 rs->general_thread = not_sent_ptid;
5110 rs->continue_thread = not_sent_ptid;
5111 rs->remote_traceframe_number = -1;
5113 rs->last_resume_exec_dir = EXEC_FORWARD;
5115 /* Probe for ability to use "ThreadInfo" query, as required. */
5116 rs->use_threadinfo_query = 1;
5117 rs->use_threadextra_query = 1;
5119 readahead_cache_invalidate ();
5121 /* Start out by owning the terminal. */
5122 remote_async_terminal_ours_p = 1;
5124 if (target_async_permitted)
5126 /* FIXME: cagney/1999-09-23: During the initial connection it is
5127 assumed that the target is already ready and able to respond to
5128 requests. Unfortunately remote_start_remote() eventually calls
5129 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5130 around this. Eventually a mechanism that allows
5131 wait_for_inferior() to expect/get timeouts will be
5133 wait_forever_enabled_p = 0;
5136 /* First delete any symbols previously loaded from shared libraries. */
5137 no_shared_libraries (NULL, 0);
5140 init_thread_list ();
5142 /* Start the remote connection. If error() or QUIT, discard this
5143 target (we'd otherwise be in an inconsistent state) and then
5144 propogate the error on up the exception chain. This ensures that
5145 the caller doesn't stumble along blindly assuming that the
5146 function succeeded. The CLI doesn't have this problem but other
5147 UI's, such as MI do.
5149 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5150 this function should return an error indication letting the
5151 caller restore the previous state. Unfortunately the command
5152 ``target remote'' is directly wired to this function making that
5153 impossible. On a positive note, the CLI side of this problem has
5154 been fixed - the function set_cmd_context() makes it possible for
5155 all the ``target ....'' commands to share a common callback
5156 function. See cli-dump.c. */
5161 remote_start_remote (from_tty, target, extended_p);
5163 CATCH (ex, RETURN_MASK_ALL)
5165 /* Pop the partially set up target - unless something else did
5166 already before throwing the exception. */
5167 if (rs->remote_desc != NULL)
5168 remote_unpush_target ();
5169 if (target_async_permitted)
5170 wait_forever_enabled_p = 1;
5171 throw_exception (ex);
5176 remote_btrace_reset ();
5178 if (target_async_permitted)
5179 wait_forever_enabled_p = 1;
5182 /* Detach the specified process. */
5185 remote_detach_pid (int pid)
5187 struct remote_state *rs = get_remote_state ();
5189 if (remote_multi_process_p (rs))
5190 xsnprintf (rs->buf, get_remote_packet_size (), "D;%x", pid);
5192 strcpy (rs->buf, "D");
5195 getpkt (&rs->buf, &rs->buf_size, 0);
5197 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
5199 else if (rs->buf[0] == '\0')
5200 error (_("Remote doesn't know how to detach"));
5202 error (_("Can't detach process."));
5205 /* This detaches a program to which we previously attached, using
5206 inferior_ptid to identify the process. After this is done, GDB
5207 can be used to debug some other program. We better not have left
5208 any breakpoints in the target program or it'll die when it hits
5212 remote_detach_1 (const char *args, int from_tty)
5214 int pid = ptid_get_pid (inferior_ptid);
5215 struct remote_state *rs = get_remote_state ();
5216 struct thread_info *tp = find_thread_ptid (inferior_ptid);
5220 error (_("Argument given to \"detach\" when remotely debugging."));
5222 if (!target_has_execution)
5223 error (_("No process to detach from."));
5225 target_announce_detach (from_tty);
5227 /* Tell the remote target to detach. */
5228 remote_detach_pid (pid);
5230 /* Exit only if this is the only active inferior. */
5231 if (from_tty && !rs->extended && number_of_live_inferiors () == 1)
5232 puts_filtered (_("Ending remote debugging.\n"));
5234 /* Check to see if we are detaching a fork parent. Note that if we
5235 are detaching a fork child, tp == NULL. */
5236 is_fork_parent = (tp != NULL
5237 && tp->pending_follow.kind == TARGET_WAITKIND_FORKED);
5239 /* If doing detach-on-fork, we don't mourn, because that will delete
5240 breakpoints that should be available for the followed inferior. */
5241 if (!is_fork_parent)
5242 target_mourn_inferior (inferior_ptid);
5245 inferior_ptid = null_ptid;
5246 detach_inferior (pid);
5251 remote_detach (struct target_ops *ops, const char *args, int from_tty)
5253 remote_detach_1 (args, from_tty);
5257 extended_remote_detach (struct target_ops *ops, const char *args, int from_tty)
5259 remote_detach_1 (args, from_tty);
5262 /* Target follow-fork function for remote targets. On entry, and
5263 at return, the current inferior is the fork parent.
5265 Note that although this is currently only used for extended-remote,
5266 it is named remote_follow_fork in anticipation of using it for the
5267 remote target as well. */
5270 remote_follow_fork (struct target_ops *ops, int follow_child,
5273 struct remote_state *rs = get_remote_state ();
5274 enum target_waitkind kind = inferior_thread ()->pending_follow.kind;
5276 if ((kind == TARGET_WAITKIND_FORKED && remote_fork_event_p (rs))
5277 || (kind == TARGET_WAITKIND_VFORKED && remote_vfork_event_p (rs)))
5279 /* When following the parent and detaching the child, we detach
5280 the child here. For the case of following the child and
5281 detaching the parent, the detach is done in the target-
5282 independent follow fork code in infrun.c. We can't use
5283 target_detach when detaching an unfollowed child because
5284 the client side doesn't know anything about the child. */
5285 if (detach_fork && !follow_child)
5287 /* Detach the fork child. */
5291 child_ptid = inferior_thread ()->pending_follow.value.related_pid;
5292 child_pid = ptid_get_pid (child_ptid);
5294 remote_detach_pid (child_pid);
5295 detach_inferior (child_pid);
5301 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5302 in the program space of the new inferior. On entry and at return the
5303 current inferior is the exec'ing inferior. INF is the new exec'd
5304 inferior, which may be the same as the exec'ing inferior unless
5305 follow-exec-mode is "new". */
5308 remote_follow_exec (struct target_ops *ops,
5309 struct inferior *inf, char *execd_pathname)
5311 /* We know that this is a target file name, so if it has the "target:"
5312 prefix we strip it off before saving it in the program space. */
5313 if (is_target_filename (execd_pathname))
5314 execd_pathname += strlen (TARGET_SYSROOT_PREFIX);
5316 set_pspace_remote_exec_file (inf->pspace, execd_pathname);
5319 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5322 remote_disconnect (struct target_ops *target, const char *args, int from_tty)
5325 error (_("Argument given to \"disconnect\" when remotely debugging."));
5327 /* Make sure we unpush even the extended remote targets. Calling
5328 target_mourn_inferior won't unpush, and remote_mourn won't
5329 unpush if there is more than one inferior left. */
5330 unpush_target (target);
5331 generic_mourn_inferior ();
5334 puts_filtered ("Ending remote debugging.\n");
5337 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5338 be chatty about it. */
5341 extended_remote_attach (struct target_ops *target, const char *args,
5344 struct remote_state *rs = get_remote_state ();
5346 char *wait_status = NULL;
5348 pid = parse_pid_to_attach (args);
5350 /* Remote PID can be freely equal to getpid, do not check it here the same
5351 way as in other targets. */
5353 if (packet_support (PACKET_vAttach) == PACKET_DISABLE)
5354 error (_("This target does not support attaching to a process"));
5358 char *exec_file = get_exec_file (0);
5361 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
5362 target_pid_to_str (pid_to_ptid (pid)));
5364 printf_unfiltered (_("Attaching to %s\n"),
5365 target_pid_to_str (pid_to_ptid (pid)));
5367 gdb_flush (gdb_stdout);
5370 xsnprintf (rs->buf, get_remote_packet_size (), "vAttach;%x", pid);
5372 getpkt (&rs->buf, &rs->buf_size, 0);
5374 switch (packet_ok (rs->buf,
5375 &remote_protocol_packets[PACKET_vAttach]))
5378 if (!target_is_non_stop_p ())
5380 /* Save the reply for later. */
5381 wait_status = (char *) alloca (strlen (rs->buf) + 1);
5382 strcpy (wait_status, rs->buf);
5384 else if (strcmp (rs->buf, "OK") != 0)
5385 error (_("Attaching to %s failed with: %s"),
5386 target_pid_to_str (pid_to_ptid (pid)),
5389 case PACKET_UNKNOWN:
5390 error (_("This target does not support attaching to a process"));
5392 error (_("Attaching to %s failed"),
5393 target_pid_to_str (pid_to_ptid (pid)));
5396 set_current_inferior (remote_add_inferior (0, pid, 1, 0));
5398 inferior_ptid = pid_to_ptid (pid);
5400 if (target_is_non_stop_p ())
5402 struct thread_info *thread;
5404 /* Get list of threads. */
5405 remote_update_thread_list (target);
5407 thread = first_thread_of_process (pid);
5409 inferior_ptid = thread->ptid;
5411 inferior_ptid = pid_to_ptid (pid);
5413 /* Invalidate our notion of the remote current thread. */
5414 record_currthread (rs, minus_one_ptid);
5418 /* Now, if we have thread information, update inferior_ptid. */
5419 inferior_ptid = remote_current_thread (inferior_ptid);
5421 /* Add the main thread to the thread list. */
5422 add_thread_silent (inferior_ptid);
5425 /* Next, if the target can specify a description, read it. We do
5426 this before anything involving memory or registers. */
5427 target_find_description ();
5429 if (!target_is_non_stop_p ())
5431 /* Use the previously fetched status. */
5432 gdb_assert (wait_status != NULL);
5434 if (target_can_async_p ())
5436 struct notif_event *reply
5437 = remote_notif_parse (¬if_client_stop, wait_status);
5439 push_stop_reply ((struct stop_reply *) reply);
5445 gdb_assert (wait_status != NULL);
5446 strcpy (rs->buf, wait_status);
5447 rs->cached_wait_status = 1;
5451 gdb_assert (wait_status == NULL);
5454 /* Implementation of the to_post_attach method. */
5457 extended_remote_post_attach (struct target_ops *ops, int pid)
5459 /* Get text, data & bss offsets. */
5462 /* In certain cases GDB might not have had the chance to start
5463 symbol lookup up until now. This could happen if the debugged
5464 binary is not using shared libraries, the vsyscall page is not
5465 present (on Linux) and the binary itself hadn't changed since the
5466 debugging process was started. */
5467 if (symfile_objfile != NULL)
5468 remote_check_symbols();
5472 /* Check for the availability of vCont. This function should also check
5476 remote_vcont_probe (struct remote_state *rs)
5480 strcpy (rs->buf, "vCont?");
5482 getpkt (&rs->buf, &rs->buf_size, 0);
5485 /* Make sure that the features we assume are supported. */
5486 if (startswith (buf, "vCont"))
5489 int support_c, support_C;
5491 rs->supports_vCont.s = 0;
5492 rs->supports_vCont.S = 0;
5495 rs->supports_vCont.t = 0;
5496 rs->supports_vCont.r = 0;
5497 while (p && *p == ';')
5500 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
5501 rs->supports_vCont.s = 1;
5502 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
5503 rs->supports_vCont.S = 1;
5504 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
5506 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
5508 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
5509 rs->supports_vCont.t = 1;
5510 else if (*p == 'r' && (*(p + 1) == ';' || *(p + 1) == 0))
5511 rs->supports_vCont.r = 1;
5513 p = strchr (p, ';');
5516 /* If c, and C are not all supported, we can't use vCont. Clearing
5517 BUF will make packet_ok disable the packet. */
5518 if (!support_c || !support_C)
5522 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
5525 /* Helper function for building "vCont" resumptions. Write a
5526 resumption to P. ENDP points to one-passed-the-end of the buffer
5527 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5528 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5529 resumed thread should be single-stepped and/or signalled. If PTID
5530 equals minus_one_ptid, then all threads are resumed; if PTID
5531 represents a process, then all threads of the process are resumed;
5532 the thread to be stepped and/or signalled is given in the global
5536 append_resumption (char *p, char *endp,
5537 ptid_t ptid, int step, enum gdb_signal siggnal)
5539 struct remote_state *rs = get_remote_state ();
5541 if (step && siggnal != GDB_SIGNAL_0)
5542 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
5544 /* GDB is willing to range step. */
5545 && use_range_stepping
5546 /* Target supports range stepping. */
5547 && rs->supports_vCont.r
5548 /* We don't currently support range stepping multiple
5549 threads with a wildcard (though the protocol allows it,
5550 so stubs shouldn't make an active effort to forbid
5552 && !(remote_multi_process_p (rs) && ptid_is_pid (ptid)))
5554 struct thread_info *tp;
5556 if (ptid_equal (ptid, minus_one_ptid))
5558 /* If we don't know about the target thread's tid, then
5559 we're resuming magic_null_ptid (see caller). */
5560 tp = find_thread_ptid (magic_null_ptid);
5563 tp = find_thread_ptid (ptid);
5564 gdb_assert (tp != NULL);
5566 if (tp->control.may_range_step)
5568 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
5570 p += xsnprintf (p, endp - p, ";r%s,%s",
5571 phex_nz (tp->control.step_range_start,
5573 phex_nz (tp->control.step_range_end,
5577 p += xsnprintf (p, endp - p, ";s");
5580 p += xsnprintf (p, endp - p, ";s");
5581 else if (siggnal != GDB_SIGNAL_0)
5582 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
5584 p += xsnprintf (p, endp - p, ";c");
5586 if (remote_multi_process_p (rs) && ptid_is_pid (ptid))
5590 /* All (-1) threads of process. */
5591 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
5593 p += xsnprintf (p, endp - p, ":");
5594 p = write_ptid (p, endp, nptid);
5596 else if (!ptid_equal (ptid, minus_one_ptid))
5598 p += xsnprintf (p, endp - p, ":");
5599 p = write_ptid (p, endp, ptid);
5605 /* Clear the thread's private info on resume. */
5608 resume_clear_thread_private_info (struct thread_info *thread)
5610 if (thread->priv != NULL)
5612 thread->priv->stop_reason = TARGET_STOPPED_BY_NO_REASON;
5613 thread->priv->watch_data_address = 0;
5617 /* Append a vCont continue-with-signal action for threads that have a
5618 non-zero stop signal. */
5621 append_pending_thread_resumptions (char *p, char *endp, ptid_t ptid)
5623 struct thread_info *thread;
5625 ALL_NON_EXITED_THREADS (thread)
5626 if (ptid_match (thread->ptid, ptid)
5627 && !ptid_equal (inferior_ptid, thread->ptid)
5628 && thread->suspend.stop_signal != GDB_SIGNAL_0)
5630 p = append_resumption (p, endp, thread->ptid,
5631 0, thread->suspend.stop_signal);
5632 thread->suspend.stop_signal = GDB_SIGNAL_0;
5633 resume_clear_thread_private_info (thread);
5639 /* Set the target running, using the packets that use Hc
5643 remote_resume_with_hc (struct target_ops *ops,
5644 ptid_t ptid, int step, enum gdb_signal siggnal)
5646 struct remote_state *rs = get_remote_state ();
5647 struct thread_info *thread;
5650 rs->last_sent_signal = siggnal;
5651 rs->last_sent_step = step;
5653 /* The c/s/C/S resume packets use Hc, so set the continue
5655 if (ptid_equal (ptid, minus_one_ptid))
5656 set_continue_thread (any_thread_ptid);
5658 set_continue_thread (ptid);
5660 ALL_NON_EXITED_THREADS (thread)
5661 resume_clear_thread_private_info (thread);
5664 if (execution_direction == EXEC_REVERSE)
5666 /* We don't pass signals to the target in reverse exec mode. */
5667 if (info_verbose && siggnal != GDB_SIGNAL_0)
5668 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5671 if (step && packet_support (PACKET_bs) == PACKET_DISABLE)
5672 error (_("Remote reverse-step not supported."));
5673 if (!step && packet_support (PACKET_bc) == PACKET_DISABLE)
5674 error (_("Remote reverse-continue not supported."));
5676 strcpy (buf, step ? "bs" : "bc");
5678 else if (siggnal != GDB_SIGNAL_0)
5680 buf[0] = step ? 'S' : 'C';
5681 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
5682 buf[2] = tohex (((int) siggnal) & 0xf);
5686 strcpy (buf, step ? "s" : "c");
5691 /* Resume the remote inferior by using a "vCont" packet. The thread
5692 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5693 resumed thread should be single-stepped and/or signalled. If PTID
5694 equals minus_one_ptid, then all threads are resumed; the thread to
5695 be stepped and/or signalled is given in the global INFERIOR_PTID.
5696 This function returns non-zero iff it resumes the inferior.
5698 This function issues a strict subset of all possible vCont commands
5702 remote_resume_with_vcont (ptid_t ptid, int step, enum gdb_signal siggnal)
5704 struct remote_state *rs = get_remote_state ();
5708 /* No reverse execution actions defined for vCont. */
5709 if (execution_direction == EXEC_REVERSE)
5712 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
5713 remote_vcont_probe (rs);
5715 if (packet_support (PACKET_vCont) == PACKET_DISABLE)
5719 endp = rs->buf + get_remote_packet_size ();
5721 /* If we could generate a wider range of packets, we'd have to worry
5722 about overflowing BUF. Should there be a generic
5723 "multi-part-packet" packet? */
5725 p += xsnprintf (p, endp - p, "vCont");
5727 if (ptid_equal (ptid, magic_null_ptid))
5729 /* MAGIC_NULL_PTID means that we don't have any active threads,
5730 so we don't have any TID numbers the inferior will
5731 understand. Make sure to only send forms that do not specify
5733 append_resumption (p, endp, minus_one_ptid, step, siggnal);
5735 else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
5737 /* Resume all threads (of all processes, or of a single
5738 process), with preference for INFERIOR_PTID. This assumes
5739 inferior_ptid belongs to the set of all threads we are about
5741 if (step || siggnal != GDB_SIGNAL_0)
5743 /* Step inferior_ptid, with or without signal. */
5744 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
5747 /* Also pass down any pending signaled resumption for other
5748 threads not the current. */
5749 p = append_pending_thread_resumptions (p, endp, ptid);
5751 /* And continue others without a signal. */
5752 append_resumption (p, endp, ptid, /*step=*/ 0, GDB_SIGNAL_0);
5756 /* Scheduler locking; resume only PTID. */
5757 append_resumption (p, endp, ptid, step, siggnal);
5760 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
5763 if (target_is_non_stop_p ())
5765 /* In non-stop, the stub replies to vCont with "OK". The stop
5766 reply will be reported asynchronously by means of a `%Stop'
5768 getpkt (&rs->buf, &rs->buf_size, 0);
5769 if (strcmp (rs->buf, "OK") != 0)
5770 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
5776 /* Tell the remote machine to resume. */
5779 remote_resume (struct target_ops *ops,
5780 ptid_t ptid, int step, enum gdb_signal siggnal)
5782 struct remote_state *rs = get_remote_state ();
5784 /* When connected in non-stop mode, the core resumes threads
5785 individually. Resuming remote threads directly in target_resume
5786 would thus result in sending one packet per thread. Instead, to
5787 minimize roundtrip latency, here we just store the resume
5788 request; the actual remote resumption will be done in
5789 target_commit_resume / remote_commit_resume, where we'll be able
5790 to do vCont action coalescing. */
5791 if (target_is_non_stop_p () && execution_direction != EXEC_REVERSE)
5793 struct private_thread_info *remote_thr;
5795 if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid))
5796 remote_thr = get_private_info_ptid (inferior_ptid);
5798 remote_thr = get_private_info_ptid (ptid);
5799 remote_thr->last_resume_step = step;
5800 remote_thr->last_resume_sig = siggnal;
5804 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5805 (explained in remote-notif.c:handle_notification) so
5806 remote_notif_process is not called. We need find a place where
5807 it is safe to start a 'vNotif' sequence. It is good to do it
5808 before resuming inferior, because inferior was stopped and no RSP
5809 traffic at that moment. */
5810 if (!target_is_non_stop_p ())
5811 remote_notif_process (rs->notif_state, ¬if_client_stop);
5813 rs->last_resume_exec_dir = execution_direction;
5815 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
5816 if (!remote_resume_with_vcont (ptid, step, siggnal))
5817 remote_resume_with_hc (ops, ptid, step, siggnal);
5819 /* We are about to start executing the inferior, let's register it
5820 with the event loop. NOTE: this is the one place where all the
5821 execution commands end up. We could alternatively do this in each
5822 of the execution commands in infcmd.c. */
5823 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5824 into infcmd.c in order to allow inferior function calls to work
5825 NOT asynchronously. */
5826 if (target_can_async_p ())
5829 /* We've just told the target to resume. The remote server will
5830 wait for the inferior to stop, and then send a stop reply. In
5831 the mean time, we can't start another command/query ourselves
5832 because the stub wouldn't be ready to process it. This applies
5833 only to the base all-stop protocol, however. In non-stop (which
5834 only supports vCont), the stub replies with an "OK", and is
5835 immediate able to process further serial input. */
5836 if (!target_is_non_stop_p ())
5837 rs->waiting_for_stop_reply = 1;
5840 static void check_pending_events_prevent_wildcard_vcont
5841 (int *may_global_wildcard_vcont);
5842 static int is_pending_fork_parent_thread (struct thread_info *thread);
5844 /* Private per-inferior info for target remote processes. */
5846 struct private_inferior
5848 /* Whether we can send a wildcard vCont for this process. */
5849 int may_wildcard_vcont;
5852 /* Structure used to track the construction of a vCont packet in the
5853 outgoing packet buffer. This is used to send multiple vCont
5854 packets if we have more actions than would fit a single packet. */
5856 struct vcont_builder
5858 /* Pointer to the first action. P points here if no action has been
5862 /* Where the next action will be appended. */
5865 /* The end of the buffer. Must never write past this. */
5869 /* Prepare the outgoing buffer for a new vCont packet. */
5872 vcont_builder_restart (struct vcont_builder *builder)
5874 struct remote_state *rs = get_remote_state ();
5876 builder->p = rs->buf;
5877 builder->endp = rs->buf + get_remote_packet_size ();
5878 builder->p += xsnprintf (builder->p, builder->endp - builder->p, "vCont");
5879 builder->first_action = builder->p;
5882 /* If the vCont packet being built has any action, send it to the
5886 vcont_builder_flush (struct vcont_builder *builder)
5888 struct remote_state *rs;
5890 if (builder->p == builder->first_action)
5893 rs = get_remote_state ();
5895 getpkt (&rs->buf, &rs->buf_size, 0);
5896 if (strcmp (rs->buf, "OK") != 0)
5897 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
5900 /* The largest action is range-stepping, with its two addresses. This
5901 is more than sufficient. If a new, bigger action is created, it'll
5902 quickly trigger a failed assertion in append_resumption (and we'll
5904 #define MAX_ACTION_SIZE 200
5906 /* Append a new vCont action in the outgoing packet being built. If
5907 the action doesn't fit the packet along with previous actions, push
5908 what we've got so far to the remote end and start over a new vCont
5909 packet (with the new action). */
5912 vcont_builder_push_action (struct vcont_builder *builder,
5913 ptid_t ptid, int step, enum gdb_signal siggnal)
5915 char buf[MAX_ACTION_SIZE + 1];
5919 endp = append_resumption (buf, buf + sizeof (buf),
5920 ptid, step, siggnal);
5922 /* Check whether this new action would fit in the vCont packet along
5923 with previous actions. If not, send what we've got so far and
5924 start a new vCont packet. */
5926 if (rsize > builder->endp - builder->p)
5928 vcont_builder_flush (builder);
5929 vcont_builder_restart (builder);
5931 /* Should now fit. */
5932 gdb_assert (rsize <= builder->endp - builder->p);
5935 memcpy (builder->p, buf, rsize);
5936 builder->p += rsize;
5940 /* to_commit_resume implementation. */
5943 remote_commit_resume (struct target_ops *ops)
5945 struct remote_state *rs = get_remote_state ();
5946 struct inferior *inf;
5947 struct thread_info *tp;
5948 int any_process_wildcard;
5949 int may_global_wildcard_vcont;
5950 struct vcont_builder vcont_builder;
5952 /* If connected in all-stop mode, we'd send the remote resume
5953 request directly from remote_resume. Likewise if
5954 reverse-debugging, as there are no defined vCont actions for
5955 reverse execution. */
5956 if (!target_is_non_stop_p () || execution_direction == EXEC_REVERSE)
5959 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
5960 instead of resuming all threads of each process individually.
5961 However, if any thread of a process must remain halted, we can't
5962 send wildcard resumes and must send one action per thread.
5964 Care must be taken to not resume threads/processes the server
5965 side already told us are stopped, but the core doesn't know about
5966 yet, because the events are still in the vStopped notification
5969 #1 => vCont s:p1.1;c
5971 #3 <= %Stopped T05 p1.1
5976 #8 (infrun handles the stop for p1.1 and continues stepping)
5977 #9 => vCont s:p1.1;c
5979 The last vCont above would resume thread p1.2 by mistake, because
5980 the server has no idea that the event for p1.2 had not been
5983 The server side must similarly ignore resume actions for the
5984 thread that has a pending %Stopped notification (and any other
5985 threads with events pending), until GDB acks the notification
5986 with vStopped. Otherwise, e.g., the following case is
5989 #1 => g (or any other packet)
5991 #3 <= %Stopped T05 p1.2
5992 #4 => vCont s:p1.1;c
5995 Above, the server must not resume thread p1.2. GDB can't know
5996 that p1.2 stopped until it acks the %Stopped notification, and
5997 since from GDB's perspective all threads should be running, it
6000 Finally, special care must also be given to handling fork/vfork
6001 events. A (v)fork event actually tells us that two processes
6002 stopped -- the parent and the child. Until we follow the fork,
6003 we must not resume the child. Therefore, if we have a pending
6004 fork follow, we must not send a global wildcard resume action
6005 (vCont;c). We can still send process-wide wildcards though. */
6007 /* Start by assuming a global wildcard (vCont;c) is possible. */
6008 may_global_wildcard_vcont = 1;
6010 /* And assume every process is individually wildcard-able too. */
6011 ALL_NON_EXITED_INFERIORS (inf)
6013 if (inf->priv == NULL)
6014 inf->priv = XNEW (struct private_inferior);
6015 inf->priv->may_wildcard_vcont = 1;
6018 /* Check for any pending events (not reported or processed yet) and
6019 disable process and global wildcard resumes appropriately. */
6020 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont);
6022 ALL_NON_EXITED_THREADS (tp)
6024 /* If a thread of a process is not meant to be resumed, then we
6025 can't wildcard that process. */
6028 tp->inf->priv->may_wildcard_vcont = 0;
6030 /* And if we can't wildcard a process, we can't wildcard
6031 everything either. */
6032 may_global_wildcard_vcont = 0;
6036 /* If a thread is the parent of an unfollowed fork, then we
6037 can't do a global wildcard, as that would resume the fork
6039 if (is_pending_fork_parent_thread (tp))
6040 may_global_wildcard_vcont = 0;
6043 /* Now let's build the vCont packet(s). Actions must be appended
6044 from narrower to wider scopes (thread -> process -> global). If
6045 we end up with too many actions for a single packet vcont_builder
6046 flushes the current vCont packet to the remote side and starts a
6048 vcont_builder_restart (&vcont_builder);
6050 /* Threads first. */
6051 ALL_NON_EXITED_THREADS (tp)
6053 struct private_thread_info *remote_thr = tp->priv;
6055 if (!tp->executing || remote_thr->vcont_resumed)
6058 gdb_assert (!thread_is_in_step_over_chain (tp));
6060 if (!remote_thr->last_resume_step
6061 && remote_thr->last_resume_sig == GDB_SIGNAL_0
6062 && tp->inf->priv->may_wildcard_vcont)
6064 /* We'll send a wildcard resume instead. */
6065 remote_thr->vcont_resumed = 1;
6069 vcont_builder_push_action (&vcont_builder, tp->ptid,
6070 remote_thr->last_resume_step,
6071 remote_thr->last_resume_sig);
6072 remote_thr->vcont_resumed = 1;
6075 /* Now check whether we can send any process-wide wildcard. This is
6076 to avoid sending a global wildcard in the case nothing is
6077 supposed to be resumed. */
6078 any_process_wildcard = 0;
6080 ALL_NON_EXITED_INFERIORS (inf)
6082 if (inf->priv->may_wildcard_vcont)
6084 any_process_wildcard = 1;
6089 if (any_process_wildcard)
6091 /* If all processes are wildcard-able, then send a single "c"
6092 action, otherwise, send an "all (-1) threads of process"
6093 continue action for each running process, if any. */
6094 if (may_global_wildcard_vcont)
6096 vcont_builder_push_action (&vcont_builder, minus_one_ptid,
6101 ALL_NON_EXITED_INFERIORS (inf)
6103 if (inf->priv->may_wildcard_vcont)
6105 vcont_builder_push_action (&vcont_builder,
6106 pid_to_ptid (inf->pid),
6113 vcont_builder_flush (&vcont_builder);
6118 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6119 thread, all threads of a remote process, or all threads of all
6123 remote_stop_ns (ptid_t ptid)
6125 struct remote_state *rs = get_remote_state ();
6127 char *endp = rs->buf + get_remote_packet_size ();
6129 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
6130 remote_vcont_probe (rs);
6132 if (!rs->supports_vCont.t)
6133 error (_("Remote server does not support stopping threads"));
6135 if (ptid_equal (ptid, minus_one_ptid)
6136 || (!remote_multi_process_p (rs) && ptid_is_pid (ptid)))
6137 p += xsnprintf (p, endp - p, "vCont;t");
6142 p += xsnprintf (p, endp - p, "vCont;t:");
6144 if (ptid_is_pid (ptid))
6145 /* All (-1) threads of process. */
6146 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
6149 /* Small optimization: if we already have a stop reply for
6150 this thread, no use in telling the stub we want this
6152 if (peek_stop_reply (ptid))
6158 write_ptid (p, endp, nptid);
6161 /* In non-stop, we get an immediate OK reply. The stop reply will
6162 come in asynchronously by notification. */
6164 getpkt (&rs->buf, &rs->buf_size, 0);
6165 if (strcmp (rs->buf, "OK") != 0)
6166 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
6169 /* All-stop version of target_interrupt. Sends a break or a ^C to
6170 interrupt the remote target. It is undefined which thread of which
6171 process reports the interrupt. */
6174 remote_interrupt_as (void)
6176 struct remote_state *rs = get_remote_state ();
6178 rs->ctrlc_pending_p = 1;
6180 /* If the inferior is stopped already, but the core didn't know
6181 about it yet, just ignore the request. The cached wait status
6182 will be collected in remote_wait. */
6183 if (rs->cached_wait_status)
6186 /* Send interrupt_sequence to remote target. */
6187 send_interrupt_sequence ();
6190 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6191 the remote target. It is undefined which thread of which process
6192 reports the interrupt. Throws an error if the packet is not
6193 supported by the server. */
6196 remote_interrupt_ns (void)
6198 struct remote_state *rs = get_remote_state ();
6200 char *endp = rs->buf + get_remote_packet_size ();
6202 xsnprintf (p, endp - p, "vCtrlC");
6204 /* In non-stop, we get an immediate OK reply. The stop reply will
6205 come in asynchronously by notification. */
6207 getpkt (&rs->buf, &rs->buf_size, 0);
6209 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vCtrlC]))
6213 case PACKET_UNKNOWN:
6214 error (_("No support for interrupting the remote target."));
6216 error (_("Interrupting target failed: %s"), rs->buf);
6220 /* Implement the to_stop function for the remote targets. */
6223 remote_stop (struct target_ops *self, ptid_t ptid)
6226 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
6228 if (target_is_non_stop_p ())
6229 remote_stop_ns (ptid);
6232 /* We don't currently have a way to transparently pause the
6233 remote target in all-stop mode. Interrupt it instead. */
6234 remote_interrupt_as ();
6238 /* Implement the to_interrupt function for the remote targets. */
6241 remote_interrupt (struct target_ops *self, ptid_t ptid)
6243 struct remote_state *rs = get_remote_state ();
6246 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
6248 if (target_is_non_stop_p ())
6249 remote_interrupt_ns ();
6251 remote_interrupt_as ();
6254 /* Implement the to_pass_ctrlc function for the remote targets. */
6257 remote_pass_ctrlc (struct target_ops *self)
6259 struct remote_state *rs = get_remote_state ();
6262 fprintf_unfiltered (gdb_stdlog, "remote_pass_ctrlc called\n");
6264 /* If we're starting up, we're not fully synced yet. Quit
6266 if (rs->starting_up)
6268 /* If ^C has already been sent once, offer to disconnect. */
6269 else if (rs->ctrlc_pending_p)
6272 target_interrupt (inferior_ptid);
6275 /* Ask the user what to do when an interrupt is received. */
6278 interrupt_query (void)
6280 struct remote_state *rs = get_remote_state ();
6282 if (rs->waiting_for_stop_reply && rs->ctrlc_pending_p)
6284 if (query (_("The target is not responding to interrupt requests.\n"
6285 "Stop debugging it? ")))
6287 remote_unpush_target ();
6288 throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target."));
6293 if (query (_("Interrupted while waiting for the program.\n"
6294 "Give up waiting? ")))
6299 /* Enable/disable target terminal ownership. Most targets can use
6300 terminal groups to control terminal ownership. Remote targets are
6301 different in that explicit transfer of ownership to/from GDB/target
6305 remote_terminal_inferior (struct target_ops *self)
6307 /* FIXME: cagney/1999-09-27: Make calls to target_terminal::*()
6308 idempotent. The event-loop GDB talking to an asynchronous target
6309 with a synchronous command calls this function from both
6310 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
6311 transfer the terminal to the target when it shouldn't this guard
6313 if (!remote_async_terminal_ours_p)
6315 remote_async_terminal_ours_p = 0;
6316 /* NOTE: At this point we could also register our selves as the
6317 recipient of all input. Any characters typed could then be
6318 passed on down to the target. */
6322 remote_terminal_ours (struct target_ops *self)
6324 /* See FIXME in remote_terminal_inferior. */
6325 if (remote_async_terminal_ours_p)
6327 remote_async_terminal_ours_p = 1;
6331 remote_console_output (char *msg)
6335 for (p = msg; p[0] && p[1]; p += 2)
6338 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
6342 fputs_unfiltered (tb, gdb_stdtarg);
6344 gdb_flush (gdb_stdtarg);
6347 DEF_VEC_O(cached_reg_t);
6349 typedef struct stop_reply
6351 struct notif_event base;
6353 /* The identifier of the thread about this event */
6356 /* The remote state this event is associated with. When the remote
6357 connection, represented by a remote_state object, is closed,
6358 all the associated stop_reply events should be released. */
6359 struct remote_state *rs;
6361 struct target_waitstatus ws;
6363 /* The architecture associated with the expedited registers. */
6366 /* Expedited registers. This makes remote debugging a bit more
6367 efficient for those targets that provide critical registers as
6368 part of their normal status mechanism (as another roundtrip to
6369 fetch them is avoided). */
6370 VEC(cached_reg_t) *regcache;
6372 enum target_stop_reason stop_reason;
6374 CORE_ADDR watch_data_address;
6379 DECLARE_QUEUE_P (stop_reply_p);
6380 DEFINE_QUEUE_P (stop_reply_p);
6381 /* The list of already fetched and acknowledged stop events. This
6382 queue is used for notification Stop, and other notifications
6383 don't need queue for their events, because the notification events
6384 of Stop can't be consumed immediately, so that events should be
6385 queued first, and be consumed by remote_wait_{ns,as} one per
6386 time. Other notifications can consume their events immediately,
6387 so queue is not needed for them. */
6388 static QUEUE (stop_reply_p) *stop_reply_queue;
6391 stop_reply_xfree (struct stop_reply *r)
6393 notif_event_xfree ((struct notif_event *) r);
6396 /* Return the length of the stop reply queue. */
6399 stop_reply_queue_length (void)
6401 return QUEUE_length (stop_reply_p, stop_reply_queue);
6405 remote_notif_stop_parse (struct notif_client *self, char *buf,
6406 struct notif_event *event)
6408 remote_parse_stop_reply (buf, (struct stop_reply *) event);
6412 remote_notif_stop_ack (struct notif_client *self, char *buf,
6413 struct notif_event *event)
6415 struct stop_reply *stop_reply = (struct stop_reply *) event;
6418 putpkt (self->ack_command);
6420 if (stop_reply->ws.kind == TARGET_WAITKIND_IGNORE)
6421 /* We got an unknown stop reply. */
6422 error (_("Unknown stop reply"));
6424 push_stop_reply (stop_reply);
6428 remote_notif_stop_can_get_pending_events (struct notif_client *self)
6430 /* We can't get pending events in remote_notif_process for
6431 notification stop, and we have to do this in remote_wait_ns
6432 instead. If we fetch all queued events from stub, remote stub
6433 may exit and we have no chance to process them back in
6435 mark_async_event_handler (remote_async_inferior_event_token);
6440 stop_reply_dtr (struct notif_event *event)
6442 struct stop_reply *r = (struct stop_reply *) event;
6447 VEC_iterate (cached_reg_t, r->regcache, ix, reg);
6451 VEC_free (cached_reg_t, r->regcache);
6454 static struct notif_event *
6455 remote_notif_stop_alloc_reply (void)
6457 /* We cast to a pointer to the "base class". */
6458 struct notif_event *r = (struct notif_event *) XNEW (struct stop_reply);
6460 r->dtr = stop_reply_dtr;
6465 /* A client of notification Stop. */
6467 struct notif_client notif_client_stop =
6471 remote_notif_stop_parse,
6472 remote_notif_stop_ack,
6473 remote_notif_stop_can_get_pending_events,
6474 remote_notif_stop_alloc_reply,
6478 /* A parameter to pass data in and out. */
6480 struct queue_iter_param
6483 struct stop_reply *output;
6486 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6487 the pid of the process that owns the threads we want to check, or
6488 -1 if we want to check all threads. */
6491 is_pending_fork_parent (struct target_waitstatus *ws, int event_pid,
6494 if (ws->kind == TARGET_WAITKIND_FORKED
6495 || ws->kind == TARGET_WAITKIND_VFORKED)
6497 if (event_pid == -1 || event_pid == ptid_get_pid (thread_ptid))
6504 /* Return the thread's pending status used to determine whether the
6505 thread is a fork parent stopped at a fork event. */
6507 static struct target_waitstatus *
6508 thread_pending_fork_status (struct thread_info *thread)
6510 if (thread->suspend.waitstatus_pending_p)
6511 return &thread->suspend.waitstatus;
6513 return &thread->pending_follow;
6516 /* Determine if THREAD is a pending fork parent thread. */
6519 is_pending_fork_parent_thread (struct thread_info *thread)
6521 struct target_waitstatus *ws = thread_pending_fork_status (thread);
6524 return is_pending_fork_parent (ws, pid, thread->ptid);
6527 /* Check whether EVENT is a fork event, and if it is, remove the
6528 fork child from the context list passed in DATA. */
6531 remove_child_of_pending_fork (QUEUE (stop_reply_p) *q,
6532 QUEUE_ITER (stop_reply_p) *iter,
6536 struct queue_iter_param *param = (struct queue_iter_param *) data;
6537 struct threads_listing_context *context
6538 = (struct threads_listing_context *) param->input;
6540 if (event->ws.kind == TARGET_WAITKIND_FORKED
6541 || event->ws.kind == TARGET_WAITKIND_VFORKED
6542 || event->ws.kind == TARGET_WAITKIND_THREAD_EXITED)
6543 threads_listing_context_remove (&event->ws, context);
6548 /* If CONTEXT contains any fork child threads that have not been
6549 reported yet, remove them from the CONTEXT list. If such a
6550 thread exists it is because we are stopped at a fork catchpoint
6551 and have not yet called follow_fork, which will set up the
6552 host-side data structures for the new process. */
6555 remove_new_fork_children (struct threads_listing_context *context)
6557 struct thread_info * thread;
6559 struct notif_client *notif = ¬if_client_stop;
6560 struct queue_iter_param param;
6562 /* For any threads stopped at a fork event, remove the corresponding
6563 fork child threads from the CONTEXT list. */
6564 ALL_NON_EXITED_THREADS (thread)
6566 struct target_waitstatus *ws = thread_pending_fork_status (thread);
6568 if (is_pending_fork_parent (ws, pid, thread->ptid))
6570 threads_listing_context_remove (ws, context);
6574 /* Check for any pending fork events (not reported or processed yet)
6575 in process PID and remove those fork child threads from the
6576 CONTEXT list as well. */
6577 remote_notif_get_pending_events (notif);
6578 param.input = context;
6579 param.output = NULL;
6580 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6581 remove_child_of_pending_fork, ¶m);
6584 /* Check whether EVENT would prevent a global or process wildcard
6588 check_pending_event_prevents_wildcard_vcont_callback
6589 (QUEUE (stop_reply_p) *q,
6590 QUEUE_ITER (stop_reply_p) *iter,
6594 struct inferior *inf;
6595 int *may_global_wildcard_vcont = (int *) data;
6597 if (event->ws.kind == TARGET_WAITKIND_NO_RESUMED
6598 || event->ws.kind == TARGET_WAITKIND_NO_HISTORY)
6601 if (event->ws.kind == TARGET_WAITKIND_FORKED
6602 || event->ws.kind == TARGET_WAITKIND_VFORKED)
6603 *may_global_wildcard_vcont = 0;
6605 inf = find_inferior_ptid (event->ptid);
6607 /* This may be the first time we heard about this process.
6608 Regardless, we must not do a global wildcard resume, otherwise
6609 we'd resume this process too. */
6610 *may_global_wildcard_vcont = 0;
6612 inf->priv->may_wildcard_vcont = 0;
6617 /* Check whether any event pending in the vStopped queue would prevent
6618 a global or process wildcard vCont action. Clear
6619 *may_global_wildcard if we can't do a global wildcard (vCont;c),
6620 and clear the event inferior's may_wildcard_vcont flag if we can't
6621 do a process-wide wildcard resume (vCont;c:pPID.-1). */
6624 check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard)
6626 struct notif_client *notif = ¬if_client_stop;
6628 remote_notif_get_pending_events (notif);
6629 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6630 check_pending_event_prevents_wildcard_vcont_callback,
6631 may_global_wildcard);
6634 /* Remove stop replies in the queue if its pid is equal to the given
6638 remove_stop_reply_for_inferior (QUEUE (stop_reply_p) *q,
6639 QUEUE_ITER (stop_reply_p) *iter,
6643 struct queue_iter_param *param = (struct queue_iter_param *) data;
6644 struct inferior *inf = (struct inferior *) param->input;
6646 if (ptid_get_pid (event->ptid) == inf->pid)
6648 stop_reply_xfree (event);
6649 QUEUE_remove_elem (stop_reply_p, q, iter);
6655 /* Discard all pending stop replies of inferior INF. */
6658 discard_pending_stop_replies (struct inferior *inf)
6660 struct queue_iter_param param;
6661 struct stop_reply *reply;
6662 struct remote_state *rs = get_remote_state ();
6663 struct remote_notif_state *rns = rs->notif_state;
6665 /* This function can be notified when an inferior exists. When the
6666 target is not remote, the notification state is NULL. */
6667 if (rs->remote_desc == NULL)
6670 reply = (struct stop_reply *) rns->pending_event[notif_client_stop.id];
6672 /* Discard the in-flight notification. */
6673 if (reply != NULL && ptid_get_pid (reply->ptid) == inf->pid)
6675 stop_reply_xfree (reply);
6676 rns->pending_event[notif_client_stop.id] = NULL;
6680 param.output = NULL;
6681 /* Discard the stop replies we have already pulled with
6683 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6684 remove_stop_reply_for_inferior, ¶m);
6687 /* If its remote state is equal to the given remote state,
6688 remove EVENT from the stop reply queue. */
6691 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p) *q,
6692 QUEUE_ITER (stop_reply_p) *iter,
6696 struct queue_iter_param *param = (struct queue_iter_param *) data;
6697 struct remote_state *rs = (struct remote_state *) param->input;
6699 if (event->rs == rs)
6701 stop_reply_xfree (event);
6702 QUEUE_remove_elem (stop_reply_p, q, iter);
6708 /* Discard the stop replies for RS in stop_reply_queue. */
6711 discard_pending_stop_replies_in_queue (struct remote_state *rs)
6713 struct queue_iter_param param;
6716 param.output = NULL;
6717 /* Discard the stop replies we have already pulled with
6719 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6720 remove_stop_reply_of_remote_state, ¶m);
6723 /* A parameter to pass data in and out. */
6726 remote_notif_remove_once_on_match (QUEUE (stop_reply_p) *q,
6727 QUEUE_ITER (stop_reply_p) *iter,
6731 struct queue_iter_param *param = (struct queue_iter_param *) data;
6732 ptid_t *ptid = (ptid_t *) param->input;
6734 if (ptid_match (event->ptid, *ptid))
6736 param->output = event;
6737 QUEUE_remove_elem (stop_reply_p, q, iter);
6744 /* Remove the first reply in 'stop_reply_queue' which matches
6747 static struct stop_reply *
6748 remote_notif_remove_queued_reply (ptid_t ptid)
6750 struct queue_iter_param param;
6752 param.input = &ptid;
6753 param.output = NULL;
6755 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6756 remote_notif_remove_once_on_match, ¶m);
6758 fprintf_unfiltered (gdb_stdlog,
6759 "notif: discard queued event: 'Stop' in %s\n",
6760 target_pid_to_str (ptid));
6762 return param.output;
6765 /* Look for a queued stop reply belonging to PTID. If one is found,
6766 remove it from the queue, and return it. Returns NULL if none is
6767 found. If there are still queued events left to process, tell the
6768 event loop to get back to target_wait soon. */
6770 static struct stop_reply *
6771 queued_stop_reply (ptid_t ptid)
6773 struct stop_reply *r = remote_notif_remove_queued_reply (ptid);
6775 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
6776 /* There's still at least an event left. */
6777 mark_async_event_handler (remote_async_inferior_event_token);
6782 /* Push a fully parsed stop reply in the stop reply queue. Since we
6783 know that we now have at least one queued event left to pass to the
6784 core side, tell the event loop to get back to target_wait soon. */
6787 push_stop_reply (struct stop_reply *new_event)
6789 QUEUE_enque (stop_reply_p, stop_reply_queue, new_event);
6792 fprintf_unfiltered (gdb_stdlog,
6793 "notif: push 'Stop' %s to queue %d\n",
6794 target_pid_to_str (new_event->ptid),
6795 QUEUE_length (stop_reply_p,
6798 mark_async_event_handler (remote_async_inferior_event_token);
6802 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p) *q,
6803 QUEUE_ITER (stop_reply_p) *iter,
6804 struct stop_reply *event,
6807 ptid_t *ptid = (ptid_t *) data;
6809 return !(ptid_equal (*ptid, event->ptid)
6810 && event->ws.kind == TARGET_WAITKIND_STOPPED);
6813 /* Returns true if we have a stop reply for PTID. */
6816 peek_stop_reply (ptid_t ptid)
6818 return !QUEUE_iterate (stop_reply_p, stop_reply_queue,
6819 stop_reply_match_ptid_and_ws, &ptid);
6822 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6823 starting with P and ending with PEND matches PREFIX. */
6826 strprefix (const char *p, const char *pend, const char *prefix)
6828 for ( ; p < pend; p++, prefix++)
6831 return *prefix == '\0';
6834 /* Parse the stop reply in BUF. Either the function succeeds, and the
6835 result is stored in EVENT, or throws an error. */
6838 remote_parse_stop_reply (char *buf, struct stop_reply *event)
6840 remote_arch_state *rsa = NULL;
6845 event->ptid = null_ptid;
6846 event->rs = get_remote_state ();
6847 event->ws.kind = TARGET_WAITKIND_IGNORE;
6848 event->ws.value.integer = 0;
6849 event->stop_reason = TARGET_STOPPED_BY_NO_REASON;
6850 event->regcache = NULL;
6855 case 'T': /* Status with PC, SP, FP, ... */
6856 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6857 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6859 n... = register number
6860 r... = register contents
6863 p = &buf[3]; /* after Txx */
6869 p1 = strchr (p, ':');
6871 error (_("Malformed packet(a) (missing colon): %s\n\
6875 error (_("Malformed packet(a) (missing register number): %s\n\
6879 /* Some "registers" are actually extended stop information.
6880 Note if you're adding a new entry here: GDB 7.9 and
6881 earlier assume that all register "numbers" that start
6882 with an hex digit are real register numbers. Make sure
6883 the server only sends such a packet if it knows the
6884 client understands it. */
6886 if (strprefix (p, p1, "thread"))
6887 event->ptid = read_ptid (++p1, &p);
6888 else if (strprefix (p, p1, "syscall_entry"))
6892 event->ws.kind = TARGET_WAITKIND_SYSCALL_ENTRY;
6893 p = unpack_varlen_hex (++p1, &sysno);
6894 event->ws.value.syscall_number = (int) sysno;
6896 else if (strprefix (p, p1, "syscall_return"))
6900 event->ws.kind = TARGET_WAITKIND_SYSCALL_RETURN;
6901 p = unpack_varlen_hex (++p1, &sysno);
6902 event->ws.value.syscall_number = (int) sysno;
6904 else if (strprefix (p, p1, "watch")
6905 || strprefix (p, p1, "rwatch")
6906 || strprefix (p, p1, "awatch"))
6908 event->stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
6909 p = unpack_varlen_hex (++p1, &addr);
6910 event->watch_data_address = (CORE_ADDR) addr;
6912 else if (strprefix (p, p1, "swbreak"))
6914 event->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT;
6916 /* Make sure the stub doesn't forget to indicate support
6918 if (packet_support (PACKET_swbreak_feature) != PACKET_ENABLE)
6919 error (_("Unexpected swbreak stop reason"));
6921 /* The value part is documented as "must be empty",
6922 though we ignore it, in case we ever decide to make
6923 use of it in a backward compatible way. */
6924 p = strchrnul (p1 + 1, ';');
6926 else if (strprefix (p, p1, "hwbreak"))
6928 event->stop_reason = TARGET_STOPPED_BY_HW_BREAKPOINT;
6930 /* Make sure the stub doesn't forget to indicate support
6932 if (packet_support (PACKET_hwbreak_feature) != PACKET_ENABLE)
6933 error (_("Unexpected hwbreak stop reason"));
6936 p = strchrnul (p1 + 1, ';');
6938 else if (strprefix (p, p1, "library"))
6940 event->ws.kind = TARGET_WAITKIND_LOADED;
6941 p = strchrnul (p1 + 1, ';');
6943 else if (strprefix (p, p1, "replaylog"))
6945 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
6946 /* p1 will indicate "begin" or "end", but it makes
6947 no difference for now, so ignore it. */
6948 p = strchrnul (p1 + 1, ';');
6950 else if (strprefix (p, p1, "core"))
6954 p = unpack_varlen_hex (++p1, &c);
6957 else if (strprefix (p, p1, "fork"))
6959 event->ws.value.related_pid = read_ptid (++p1, &p);
6960 event->ws.kind = TARGET_WAITKIND_FORKED;
6962 else if (strprefix (p, p1, "vfork"))
6964 event->ws.value.related_pid = read_ptid (++p1, &p);
6965 event->ws.kind = TARGET_WAITKIND_VFORKED;
6967 else if (strprefix (p, p1, "vforkdone"))
6969 event->ws.kind = TARGET_WAITKIND_VFORK_DONE;
6970 p = strchrnul (p1 + 1, ';');
6972 else if (strprefix (p, p1, "exec"))
6975 char pathname[PATH_MAX];
6978 /* Determine the length of the execd pathname. */
6979 p = unpack_varlen_hex (++p1, &ignored);
6980 pathlen = (p - p1) / 2;
6982 /* Save the pathname for event reporting and for
6983 the next run command. */
6984 hex2bin (p1, (gdb_byte *) pathname, pathlen);
6985 pathname[pathlen] = '\0';
6987 /* This is freed during event handling. */
6988 event->ws.value.execd_pathname = xstrdup (pathname);
6989 event->ws.kind = TARGET_WAITKIND_EXECD;
6991 /* Skip the registers included in this packet, since
6992 they may be for an architecture different from the
6993 one used by the original program. */
6996 else if (strprefix (p, p1, "create"))
6998 event->ws.kind = TARGET_WAITKIND_THREAD_CREATED;
6999 p = strchrnul (p1 + 1, ';');
7008 p = strchrnul (p1 + 1, ';');
7013 /* Maybe a real ``P'' register number. */
7014 p_temp = unpack_varlen_hex (p, &pnum);
7015 /* If the first invalid character is the colon, we got a
7016 register number. Otherwise, it's an unknown stop
7020 /* If we haven't parsed the event's thread yet, find
7021 it now, in order to find the architecture of the
7022 reported expedited registers. */
7023 if (event->ptid == null_ptid)
7025 const char *thr = strstr (p1 + 1, ";thread:");
7027 event->ptid = read_ptid (thr + strlen (";thread:"),
7030 event->ptid = magic_null_ptid;
7035 inferior *inf = (event->ptid == null_ptid
7037 : find_inferior_ptid (event->ptid));
7038 /* If this is the first time we learn anything
7039 about this process, skip the registers
7040 included in this packet, since we don't yet
7041 know which architecture to use to parse them.
7042 We'll determine the architecture later when
7043 we process the stop reply and retrieve the
7044 target description, via
7045 remote_notice_new_inferior ->
7046 post_create_inferior. */
7049 p = strchrnul (p1 + 1, ';');
7054 event->arch = inf->gdbarch;
7055 rsa = get_remote_arch_state (event->arch);
7059 = packet_reg_from_pnum (event->arch, rsa, pnum);
7060 cached_reg_t cached_reg;
7063 error (_("Remote sent bad register number %s: %s\n\
7065 hex_string (pnum), p, buf);
7067 cached_reg.num = reg->regnum;
7068 cached_reg.data = (gdb_byte *)
7069 xmalloc (register_size (event->arch, reg->regnum));
7072 fieldsize = hex2bin (p, cached_reg.data,
7073 register_size (event->arch, reg->regnum));
7075 if (fieldsize < register_size (event->arch, reg->regnum))
7076 warning (_("Remote reply is too short: %s"), buf);
7078 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
7082 /* Not a number. Silently skip unknown optional
7084 p = strchrnul (p1 + 1, ';');
7089 error (_("Remote register badly formatted: %s\nhere: %s"),
7094 if (event->ws.kind != TARGET_WAITKIND_IGNORE)
7098 case 'S': /* Old style status, just signal only. */
7102 event->ws.kind = TARGET_WAITKIND_STOPPED;
7103 sig = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
7104 if (GDB_SIGNAL_FIRST <= sig && sig < GDB_SIGNAL_LAST)
7105 event->ws.value.sig = (enum gdb_signal) sig;
7107 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
7110 case 'w': /* Thread exited. */
7115 event->ws.kind = TARGET_WAITKIND_THREAD_EXITED;
7116 p = unpack_varlen_hex (&buf[1], &value);
7117 event->ws.value.integer = value;
7119 error (_("stop reply packet badly formatted: %s"), buf);
7120 event->ptid = read_ptid (++p, NULL);
7123 case 'W': /* Target exited. */
7130 /* GDB used to accept only 2 hex chars here. Stubs should
7131 only send more if they detect GDB supports multi-process
7133 p = unpack_varlen_hex (&buf[1], &value);
7137 /* The remote process exited. */
7138 event->ws.kind = TARGET_WAITKIND_EXITED;
7139 event->ws.value.integer = value;
7143 /* The remote process exited with a signal. */
7144 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
7145 if (GDB_SIGNAL_FIRST <= value && value < GDB_SIGNAL_LAST)
7146 event->ws.value.sig = (enum gdb_signal) value;
7148 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
7151 /* If no process is specified, assume inferior_ptid. */
7152 pid = ptid_get_pid (inferior_ptid);
7161 else if (startswith (p, "process:"))
7165 p += sizeof ("process:") - 1;
7166 unpack_varlen_hex (p, &upid);
7170 error (_("unknown stop reply packet: %s"), buf);
7173 error (_("unknown stop reply packet: %s"), buf);
7174 event->ptid = pid_to_ptid (pid);
7178 event->ws.kind = TARGET_WAITKIND_NO_RESUMED;
7179 event->ptid = minus_one_ptid;
7183 if (target_is_non_stop_p () && ptid_equal (event->ptid, null_ptid))
7184 error (_("No process or thread specified in stop reply: %s"), buf);
7187 /* When the stub wants to tell GDB about a new notification reply, it
7188 sends a notification (%Stop, for example). Those can come it at
7189 any time, hence, we have to make sure that any pending
7190 putpkt/getpkt sequence we're making is finished, before querying
7191 the stub for more events with the corresponding ack command
7192 (vStopped, for example). E.g., if we started a vStopped sequence
7193 immediately upon receiving the notification, something like this
7201 1.6) <-- (registers reply to step #1.3)
7203 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7206 To solve this, whenever we parse a %Stop notification successfully,
7207 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7208 doing whatever we were doing:
7214 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7215 2.5) <-- (registers reply to step #2.3)
7217 Eventualy after step #2.5, we return to the event loop, which
7218 notices there's an event on the
7219 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7220 associated callback --- the function below. At this point, we're
7221 always safe to start a vStopped sequence. :
7224 2.7) <-- T05 thread:2
7230 remote_notif_get_pending_events (struct notif_client *nc)
7232 struct remote_state *rs = get_remote_state ();
7234 if (rs->notif_state->pending_event[nc->id] != NULL)
7237 fprintf_unfiltered (gdb_stdlog,
7238 "notif: process: '%s' ack pending event\n",
7242 nc->ack (nc, rs->buf, rs->notif_state->pending_event[nc->id]);
7243 rs->notif_state->pending_event[nc->id] = NULL;
7247 getpkt (&rs->buf, &rs->buf_size, 0);
7248 if (strcmp (rs->buf, "OK") == 0)
7251 remote_notif_ack (nc, rs->buf);
7257 fprintf_unfiltered (gdb_stdlog,
7258 "notif: process: '%s' no pending reply\n",
7263 /* Called when it is decided that STOP_REPLY holds the info of the
7264 event that is to be returned to the core. This function always
7265 destroys STOP_REPLY. */
7268 process_stop_reply (struct stop_reply *stop_reply,
7269 struct target_waitstatus *status)
7273 *status = stop_reply->ws;
7274 ptid = stop_reply->ptid;
7276 /* If no thread/process was reported by the stub, assume the current
7278 if (ptid_equal (ptid, null_ptid))
7279 ptid = inferior_ptid;
7281 if (status->kind != TARGET_WAITKIND_EXITED
7282 && status->kind != TARGET_WAITKIND_SIGNALLED
7283 && status->kind != TARGET_WAITKIND_NO_RESUMED)
7285 struct private_thread_info *remote_thr;
7287 /* Expedited registers. */
7288 if (stop_reply->regcache)
7290 struct regcache *regcache
7291 = get_thread_arch_regcache (ptid, stop_reply->arch);
7296 VEC_iterate (cached_reg_t, stop_reply->regcache, ix, reg);
7299 regcache_raw_supply (regcache, reg->num, reg->data);
7303 VEC_free (cached_reg_t, stop_reply->regcache);
7306 remote_notice_new_inferior (ptid, 0);
7307 remote_thr = get_private_info_ptid (ptid);
7308 remote_thr->core = stop_reply->core;
7309 remote_thr->stop_reason = stop_reply->stop_reason;
7310 remote_thr->watch_data_address = stop_reply->watch_data_address;
7311 remote_thr->vcont_resumed = 0;
7314 stop_reply_xfree (stop_reply);
7318 /* The non-stop mode version of target_wait. */
7321 remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
7323 struct remote_state *rs = get_remote_state ();
7324 struct stop_reply *stop_reply;
7328 /* If in non-stop mode, get out of getpkt even if a
7329 notification is received. */
7331 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
7332 0 /* forever */, &is_notif);
7335 if (ret != -1 && !is_notif)
7338 case 'E': /* Error of some sort. */
7339 /* We're out of sync with the target now. Did it continue
7340 or not? We can't tell which thread it was in non-stop,
7341 so just ignore this. */
7342 warning (_("Remote failure reply: %s"), rs->buf);
7344 case 'O': /* Console output. */
7345 remote_console_output (rs->buf + 1);
7348 warning (_("Invalid remote reply: %s"), rs->buf);
7352 /* Acknowledge a pending stop reply that may have arrived in the
7354 if (rs->notif_state->pending_event[notif_client_stop.id] != NULL)
7355 remote_notif_get_pending_events (¬if_client_stop);
7357 /* If indeed we noticed a stop reply, we're done. */
7358 stop_reply = queued_stop_reply (ptid);
7359 if (stop_reply != NULL)
7360 return process_stop_reply (stop_reply, status);
7362 /* Still no event. If we're just polling for an event, then
7363 return to the event loop. */
7364 if (options & TARGET_WNOHANG)
7366 status->kind = TARGET_WAITKIND_IGNORE;
7367 return minus_one_ptid;
7370 /* Otherwise do a blocking wait. */
7371 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
7372 1 /* forever */, &is_notif);
7376 /* Wait until the remote machine stops, then return, storing status in
7377 STATUS just as `wait' would. */
7380 remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options)
7382 struct remote_state *rs = get_remote_state ();
7383 ptid_t event_ptid = null_ptid;
7385 struct stop_reply *stop_reply;
7389 status->kind = TARGET_WAITKIND_IGNORE;
7390 status->value.integer = 0;
7392 stop_reply = queued_stop_reply (ptid);
7393 if (stop_reply != NULL)
7394 return process_stop_reply (stop_reply, status);
7396 if (rs->cached_wait_status)
7397 /* Use the cached wait status, but only once. */
7398 rs->cached_wait_status = 0;
7403 int forever = ((options & TARGET_WNOHANG) == 0
7404 && wait_forever_enabled_p);
7406 if (!rs->waiting_for_stop_reply)
7408 status->kind = TARGET_WAITKIND_NO_RESUMED;
7409 return minus_one_ptid;
7412 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7413 _never_ wait for ever -> test on target_is_async_p().
7414 However, before we do that we need to ensure that the caller
7415 knows how to take the target into/out of async mode. */
7416 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
7417 forever, &is_notif);
7419 /* GDB gets a notification. Return to core as this event is
7421 if (ret != -1 && is_notif)
7422 return minus_one_ptid;
7424 if (ret == -1 && (options & TARGET_WNOHANG) != 0)
7425 return minus_one_ptid;
7430 /* Assume that the target has acknowledged Ctrl-C unless we receive
7431 an 'F' or 'O' packet. */
7432 if (buf[0] != 'F' && buf[0] != 'O')
7433 rs->ctrlc_pending_p = 0;
7437 case 'E': /* Error of some sort. */
7438 /* We're out of sync with the target now. Did it continue or
7439 not? Not is more likely, so report a stop. */
7440 rs->waiting_for_stop_reply = 0;
7442 warning (_("Remote failure reply: %s"), buf);
7443 status->kind = TARGET_WAITKIND_STOPPED;
7444 status->value.sig = GDB_SIGNAL_0;
7446 case 'F': /* File-I/O request. */
7447 /* GDB may access the inferior memory while handling the File-I/O
7448 request, but we don't want GDB accessing memory while waiting
7449 for a stop reply. See the comments in putpkt_binary. Set
7450 waiting_for_stop_reply to 0 temporarily. */
7451 rs->waiting_for_stop_reply = 0;
7452 remote_fileio_request (buf, rs->ctrlc_pending_p);
7453 rs->ctrlc_pending_p = 0;
7454 /* GDB handled the File-I/O request, and the target is running
7455 again. Keep waiting for events. */
7456 rs->waiting_for_stop_reply = 1;
7458 case 'N': case 'T': case 'S': case 'X': case 'W':
7460 struct stop_reply *stop_reply;
7462 /* There is a stop reply to handle. */
7463 rs->waiting_for_stop_reply = 0;
7466 = (struct stop_reply *) remote_notif_parse (¬if_client_stop,
7469 event_ptid = process_stop_reply (stop_reply, status);
7472 case 'O': /* Console output. */
7473 remote_console_output (buf + 1);
7476 if (rs->last_sent_signal != GDB_SIGNAL_0)
7478 /* Zero length reply means that we tried 'S' or 'C' and the
7479 remote system doesn't support it. */
7480 target_terminal::ours_for_output ();
7482 ("Can't send signals to this remote system. %s not sent.\n",
7483 gdb_signal_to_name (rs->last_sent_signal));
7484 rs->last_sent_signal = GDB_SIGNAL_0;
7485 target_terminal::inferior ();
7487 strcpy (buf, rs->last_sent_step ? "s" : "c");
7491 /* else fallthrough */
7493 warning (_("Invalid remote reply: %s"), buf);
7497 if (status->kind == TARGET_WAITKIND_NO_RESUMED)
7498 return minus_one_ptid;
7499 else if (status->kind == TARGET_WAITKIND_IGNORE)
7501 /* Nothing interesting happened. If we're doing a non-blocking
7502 poll, we're done. Otherwise, go back to waiting. */
7503 if (options & TARGET_WNOHANG)
7504 return minus_one_ptid;
7508 else if (status->kind != TARGET_WAITKIND_EXITED
7509 && status->kind != TARGET_WAITKIND_SIGNALLED)
7511 if (!ptid_equal (event_ptid, null_ptid))
7512 record_currthread (rs, event_ptid);
7514 event_ptid = inferior_ptid;
7517 /* A process exit. Invalidate our notion of current thread. */
7518 record_currthread (rs, minus_one_ptid);
7523 /* Wait until the remote machine stops, then return, storing status in
7524 STATUS just as `wait' would. */
7527 remote_wait (struct target_ops *ops,
7528 ptid_t ptid, struct target_waitstatus *status, int options)
7532 if (target_is_non_stop_p ())
7533 event_ptid = remote_wait_ns (ptid, status, options);
7535 event_ptid = remote_wait_as (ptid, status, options);
7537 if (target_is_async_p ())
7539 /* If there are are events left in the queue tell the event loop
7541 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
7542 mark_async_event_handler (remote_async_inferior_event_token);
7548 /* Fetch a single register using a 'p' packet. */
7551 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
7553 struct gdbarch *gdbarch = get_regcache_arch (regcache);
7554 struct remote_state *rs = get_remote_state ();
7556 gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum));
7559 if (packet_support (PACKET_p) == PACKET_DISABLE)
7562 if (reg->pnum == -1)
7567 p += hexnumstr (p, reg->pnum);
7570 getpkt (&rs->buf, &rs->buf_size, 0);
7574 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
7578 case PACKET_UNKNOWN:
7581 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7582 gdbarch_register_name (get_regcache_arch (regcache),
7587 /* If this register is unfetchable, tell the regcache. */
7590 regcache_raw_supply (regcache, reg->regnum, NULL);
7594 /* Otherwise, parse and supply the value. */
7600 error (_("fetch_register_using_p: early buf termination"));
7602 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
7605 regcache_raw_supply (regcache, reg->regnum, regp);
7609 /* Fetch the registers included in the target's 'g' packet. */
7612 send_g_packet (void)
7614 struct remote_state *rs = get_remote_state ();
7617 xsnprintf (rs->buf, get_remote_packet_size (), "g");
7618 remote_send (&rs->buf, &rs->buf_size);
7620 /* We can get out of synch in various cases. If the first character
7621 in the buffer is not a hex character, assume that has happened
7622 and try to fetch another packet to read. */
7623 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
7624 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
7625 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
7626 && rs->buf[0] != 'x') /* New: unavailable register value. */
7629 fprintf_unfiltered (gdb_stdlog,
7630 "Bad register packet; fetching a new packet\n");
7631 getpkt (&rs->buf, &rs->buf_size, 0);
7634 buf_len = strlen (rs->buf);
7636 /* Sanity check the received packet. */
7637 if (buf_len % 2 != 0)
7638 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
7644 process_g_packet (struct regcache *regcache)
7646 struct gdbarch *gdbarch = get_regcache_arch (regcache);
7647 struct remote_state *rs = get_remote_state ();
7648 remote_arch_state *rsa = get_remote_arch_state (gdbarch);
7653 buf_len = strlen (rs->buf);
7655 /* Further sanity checks, with knowledge of the architecture. */
7656 if (buf_len > 2 * rsa->sizeof_g_packet)
7657 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
7658 "bytes): %s"), rsa->sizeof_g_packet, buf_len / 2, rs->buf);
7660 /* Save the size of the packet sent to us by the target. It is used
7661 as a heuristic when determining the max size of packets that the
7662 target can safely receive. */
7663 if (rsa->actual_register_packet_size == 0)
7664 rsa->actual_register_packet_size = buf_len;
7666 /* If this is smaller than we guessed the 'g' packet would be,
7667 update our records. A 'g' reply that doesn't include a register's
7668 value implies either that the register is not available, or that
7669 the 'p' packet must be used. */
7670 if (buf_len < 2 * rsa->sizeof_g_packet)
7672 long sizeof_g_packet = buf_len / 2;
7674 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
7676 long offset = rsa->regs[i].offset;
7677 long reg_size = register_size (gdbarch, i);
7679 if (rsa->regs[i].pnum == -1)
7682 if (offset >= sizeof_g_packet)
7683 rsa->regs[i].in_g_packet = 0;
7684 else if (offset + reg_size > sizeof_g_packet)
7685 error (_("Truncated register %d in remote 'g' packet"), i);
7687 rsa->regs[i].in_g_packet = 1;
7690 /* Looks valid enough, we can assume this is the correct length
7691 for a 'g' packet. It's important not to adjust
7692 rsa->sizeof_g_packet if we have truncated registers otherwise
7693 this "if" won't be run the next time the method is called
7694 with a packet of the same size and one of the internal errors
7695 below will trigger instead. */
7696 rsa->sizeof_g_packet = sizeof_g_packet;
7699 regs = (char *) alloca (rsa->sizeof_g_packet);
7701 /* Unimplemented registers read as all bits zero. */
7702 memset (regs, 0, rsa->sizeof_g_packet);
7704 /* Reply describes registers byte by byte, each byte encoded as two
7705 hex characters. Suck them all up, then supply them to the
7706 register cacheing/storage mechanism. */
7709 for (i = 0; i < rsa->sizeof_g_packet; i++)
7711 if (p[0] == 0 || p[1] == 0)
7712 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7713 internal_error (__FILE__, __LINE__,
7714 _("unexpected end of 'g' packet reply"));
7716 if (p[0] == 'x' && p[1] == 'x')
7717 regs[i] = 0; /* 'x' */
7719 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
7723 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
7725 struct packet_reg *r = &rsa->regs[i];
7726 long reg_size = register_size (gdbarch, i);
7730 if ((r->offset + reg_size) * 2 > strlen (rs->buf))
7731 /* This shouldn't happen - we adjusted in_g_packet above. */
7732 internal_error (__FILE__, __LINE__,
7733 _("unexpected end of 'g' packet reply"));
7734 else if (rs->buf[r->offset * 2] == 'x')
7736 gdb_assert (r->offset * 2 < strlen (rs->buf));
7737 /* The register isn't available, mark it as such (at
7738 the same time setting the value to zero). */
7739 regcache_raw_supply (regcache, r->regnum, NULL);
7742 regcache_raw_supply (regcache, r->regnum,
7749 fetch_registers_using_g (struct regcache *regcache)
7752 process_g_packet (regcache);
7755 /* Make the remote selected traceframe match GDB's selected
7759 set_remote_traceframe (void)
7762 struct remote_state *rs = get_remote_state ();
7764 if (rs->remote_traceframe_number == get_traceframe_number ())
7767 /* Avoid recursion, remote_trace_find calls us again. */
7768 rs->remote_traceframe_number = get_traceframe_number ();
7770 newnum = target_trace_find (tfind_number,
7771 get_traceframe_number (), 0, 0, NULL);
7773 /* Should not happen. If it does, all bets are off. */
7774 if (newnum != get_traceframe_number ())
7775 warning (_("could not set remote traceframe"));
7779 remote_fetch_registers (struct target_ops *ops,
7780 struct regcache *regcache, int regnum)
7782 struct gdbarch *gdbarch = get_regcache_arch (regcache);
7783 remote_arch_state *rsa = get_remote_arch_state (gdbarch);
7786 set_remote_traceframe ();
7787 set_general_thread (regcache_get_ptid (regcache));
7791 packet_reg *reg = packet_reg_from_regnum (gdbarch, rsa, regnum);
7793 gdb_assert (reg != NULL);
7795 /* If this register might be in the 'g' packet, try that first -
7796 we are likely to read more than one register. If this is the
7797 first 'g' packet, we might be overly optimistic about its
7798 contents, so fall back to 'p'. */
7799 if (reg->in_g_packet)
7801 fetch_registers_using_g (regcache);
7802 if (reg->in_g_packet)
7806 if (fetch_register_using_p (regcache, reg))
7809 /* This register is not available. */
7810 regcache_raw_supply (regcache, reg->regnum, NULL);
7815 fetch_registers_using_g (regcache);
7817 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
7818 if (!rsa->regs[i].in_g_packet)
7819 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
7821 /* This register is not available. */
7822 regcache_raw_supply (regcache, i, NULL);
7826 /* Prepare to store registers. Since we may send them all (using a
7827 'G' request), we have to read out the ones we don't want to change
7831 remote_prepare_to_store (struct target_ops *self, struct regcache *regcache)
7833 remote_arch_state *rsa = get_remote_arch_state (regcache->arch ());
7836 /* Make sure the entire registers array is valid. */
7837 switch (packet_support (PACKET_P))
7839 case PACKET_DISABLE:
7840 case PACKET_SUPPORT_UNKNOWN:
7841 /* Make sure all the necessary registers are cached. */
7842 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7843 if (rsa->regs[i].in_g_packet)
7844 regcache_raw_update (regcache, rsa->regs[i].regnum);
7851 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7852 packet was not recognized. */
7855 store_register_using_P (const struct regcache *regcache,
7856 struct packet_reg *reg)
7858 struct gdbarch *gdbarch = get_regcache_arch (regcache);
7859 struct remote_state *rs = get_remote_state ();
7860 /* Try storing a single register. */
7861 char *buf = rs->buf;
7862 gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum));
7865 if (packet_support (PACKET_P) == PACKET_DISABLE)
7868 if (reg->pnum == -1)
7871 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
7872 p = buf + strlen (buf);
7873 regcache_raw_collect (regcache, reg->regnum, regp);
7874 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
7876 getpkt (&rs->buf, &rs->buf_size, 0);
7878 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
7883 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7884 gdbarch_register_name (gdbarch, reg->regnum), rs->buf);
7885 case PACKET_UNKNOWN:
7888 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
7892 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7893 contents of the register cache buffer. FIXME: ignores errors. */
7896 store_registers_using_G (const struct regcache *regcache)
7898 struct remote_state *rs = get_remote_state ();
7899 remote_arch_state *rsa = get_remote_arch_state (regcache->arch ());
7903 /* Extract all the registers in the regcache copying them into a
7908 regs = (gdb_byte *) alloca (rsa->sizeof_g_packet);
7909 memset (regs, 0, rsa->sizeof_g_packet);
7910 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7912 struct packet_reg *r = &rsa->regs[i];
7915 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
7919 /* Command describes registers byte by byte,
7920 each byte encoded as two hex characters. */
7923 bin2hex (regs, p, rsa->sizeof_g_packet);
7925 getpkt (&rs->buf, &rs->buf_size, 0);
7926 if (packet_check_result (rs->buf) == PACKET_ERROR)
7927 error (_("Could not write registers; remote failure reply '%s'"),
7931 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7932 of the register cache buffer. FIXME: ignores errors. */
7935 remote_store_registers (struct target_ops *ops,
7936 struct regcache *regcache, int regnum)
7938 struct gdbarch *gdbarch = regcache->arch ();
7939 remote_arch_state *rsa = get_remote_arch_state (gdbarch);
7942 set_remote_traceframe ();
7943 set_general_thread (regcache_get_ptid (regcache));
7947 packet_reg *reg = packet_reg_from_regnum (gdbarch, rsa, regnum);
7949 gdb_assert (reg != NULL);
7951 /* Always prefer to store registers using the 'P' packet if
7952 possible; we often change only a small number of registers.
7953 Sometimes we change a larger number; we'd need help from a
7954 higher layer to know to use 'G'. */
7955 if (store_register_using_P (regcache, reg))
7958 /* For now, don't complain if we have no way to write the
7959 register. GDB loses track of unavailable registers too
7960 easily. Some day, this may be an error. We don't have
7961 any way to read the register, either... */
7962 if (!reg->in_g_packet)
7965 store_registers_using_G (regcache);
7969 store_registers_using_G (regcache);
7971 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
7972 if (!rsa->regs[i].in_g_packet)
7973 if (!store_register_using_P (regcache, &rsa->regs[i]))
7974 /* See above for why we do not issue an error here. */
7979 /* Return the number of hex digits in num. */
7982 hexnumlen (ULONGEST num)
7986 for (i = 0; num != 0; i++)
7989 return std::max (i, 1);
7992 /* Set BUF to the minimum number of hex digits representing NUM. */
7995 hexnumstr (char *buf, ULONGEST num)
7997 int len = hexnumlen (num);
7999 return hexnumnstr (buf, num, len);
8003 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8006 hexnumnstr (char *buf, ULONGEST num, int width)
8012 for (i = width - 1; i >= 0; i--)
8014 buf[i] = "0123456789abcdef"[(num & 0xf)];
8021 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8024 remote_address_masked (CORE_ADDR addr)
8026 unsigned int address_size = remote_address_size;
8028 /* If "remoteaddresssize" was not set, default to target address size. */
8030 address_size = gdbarch_addr_bit (target_gdbarch ());
8032 if (address_size > 0
8033 && address_size < (sizeof (ULONGEST) * 8))
8035 /* Only create a mask when that mask can safely be constructed
8036 in a ULONGEST variable. */
8039 mask = (mask << address_size) - 1;
8045 /* Determine whether the remote target supports binary downloading.
8046 This is accomplished by sending a no-op memory write of zero length
8047 to the target at the specified address. It does not suffice to send
8048 the whole packet, since many stubs strip the eighth bit and
8049 subsequently compute a wrong checksum, which causes real havoc with
8052 NOTE: This can still lose if the serial line is not eight-bit
8053 clean. In cases like this, the user should clear "remote
8057 check_binary_download (CORE_ADDR addr)
8059 struct remote_state *rs = get_remote_state ();
8061 switch (packet_support (PACKET_X))
8063 case PACKET_DISABLE:
8067 case PACKET_SUPPORT_UNKNOWN:
8073 p += hexnumstr (p, (ULONGEST) addr);
8075 p += hexnumstr (p, (ULONGEST) 0);
8079 putpkt_binary (rs->buf, (int) (p - rs->buf));
8080 getpkt (&rs->buf, &rs->buf_size, 0);
8082 if (rs->buf[0] == '\0')
8085 fprintf_unfiltered (gdb_stdlog,
8086 "binary downloading NOT "
8087 "supported by target\n");
8088 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
8093 fprintf_unfiltered (gdb_stdlog,
8094 "binary downloading supported by target\n");
8095 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
8102 /* Helper function to resize the payload in order to try to get a good
8103 alignment. We try to write an amount of data such that the next write will
8104 start on an address aligned on REMOTE_ALIGN_WRITES. */
8107 align_for_efficient_write (int todo, CORE_ADDR memaddr)
8109 return ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
8112 /* Write memory data directly to the remote machine.
8113 This does not inform the data cache; the data cache uses this.
8114 HEADER is the starting part of the packet.
8115 MEMADDR is the address in the remote memory space.
8116 MYADDR is the address of the buffer in our space.
8117 LEN_UNITS is the number of addressable units to write.
8118 UNIT_SIZE is the length in bytes of an addressable unit.
8119 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8120 should send data as binary ('X'), or hex-encoded ('M').
8122 The function creates packet of the form
8123 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8125 where encoding of <DATA> is terminated by PACKET_FORMAT.
8127 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8130 Return the transferred status, error or OK (an
8131 'enum target_xfer_status' value). Save the number of addressable units
8132 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8134 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8135 exchange between gdb and the stub could look like (?? in place of the
8141 -> $M1000,3:eeeeffffeeee#??
8145 <- eeeeffffeeeedddd */
8147 static enum target_xfer_status
8148 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
8149 const gdb_byte *myaddr, ULONGEST len_units,
8150 int unit_size, ULONGEST *xfered_len_units,
8151 char packet_format, int use_length)
8153 struct remote_state *rs = get_remote_state ();
8159 int payload_capacity_bytes;
8160 int payload_length_bytes;
8162 if (packet_format != 'X' && packet_format != 'M')
8163 internal_error (__FILE__, __LINE__,
8164 _("remote_write_bytes_aux: bad packet format"));
8167 return TARGET_XFER_EOF;
8169 payload_capacity_bytes = get_memory_write_packet_size ();
8171 /* The packet buffer will be large enough for the payload;
8172 get_memory_packet_size ensures this. */
8175 /* Compute the size of the actual payload by subtracting out the
8176 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8178 payload_capacity_bytes -= strlen ("$,:#NN");
8180 /* The comma won't be used. */
8181 payload_capacity_bytes += 1;
8182 payload_capacity_bytes -= strlen (header);
8183 payload_capacity_bytes -= hexnumlen (memaddr);
8185 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8187 strcat (rs->buf, header);
8188 p = rs->buf + strlen (header);
8190 /* Compute a best guess of the number of bytes actually transfered. */
8191 if (packet_format == 'X')
8193 /* Best guess at number of bytes that will fit. */
8194 todo_units = std::min (len_units,
8195 (ULONGEST) payload_capacity_bytes / unit_size);
8197 payload_capacity_bytes -= hexnumlen (todo_units);
8198 todo_units = std::min (todo_units, payload_capacity_bytes / unit_size);
8202 /* Number of bytes that will fit. */
8204 = std::min (len_units,
8205 (ULONGEST) (payload_capacity_bytes / unit_size) / 2);
8207 payload_capacity_bytes -= hexnumlen (todo_units);
8208 todo_units = std::min (todo_units,
8209 (payload_capacity_bytes / unit_size) / 2);
8212 if (todo_units <= 0)
8213 internal_error (__FILE__, __LINE__,
8214 _("minimum packet size too small to write data"));
8216 /* If we already need another packet, then try to align the end
8217 of this packet to a useful boundary. */
8218 if (todo_units > 2 * REMOTE_ALIGN_WRITES && todo_units < len_units)
8219 todo_units = align_for_efficient_write (todo_units, memaddr);
8221 /* Append "<memaddr>". */
8222 memaddr = remote_address_masked (memaddr);
8223 p += hexnumstr (p, (ULONGEST) memaddr);
8230 /* Append the length and retain its location and size. It may need to be
8231 adjusted once the packet body has been created. */
8233 plenlen = hexnumstr (p, (ULONGEST) todo_units);
8241 /* Append the packet body. */
8242 if (packet_format == 'X')
8244 /* Binary mode. Send target system values byte by byte, in
8245 increasing byte addresses. Only escape certain critical
8247 payload_length_bytes =
8248 remote_escape_output (myaddr, todo_units, unit_size, (gdb_byte *) p,
8249 &units_written, payload_capacity_bytes);
8251 /* If not all TODO units fit, then we'll need another packet. Make
8252 a second try to keep the end of the packet aligned. Don't do
8253 this if the packet is tiny. */
8254 if (units_written < todo_units && units_written > 2 * REMOTE_ALIGN_WRITES)
8258 new_todo_units = align_for_efficient_write (units_written, memaddr);
8260 if (new_todo_units != units_written)
8261 payload_length_bytes =
8262 remote_escape_output (myaddr, new_todo_units, unit_size,
8263 (gdb_byte *) p, &units_written,
8264 payload_capacity_bytes);
8267 p += payload_length_bytes;
8268 if (use_length && units_written < todo_units)
8270 /* Escape chars have filled up the buffer prematurely,
8271 and we have actually sent fewer units than planned.
8272 Fix-up the length field of the packet. Use the same
8273 number of characters as before. */
8274 plen += hexnumnstr (plen, (ULONGEST) units_written,
8276 *plen = ':'; /* overwrite \0 from hexnumnstr() */
8281 /* Normal mode: Send target system values byte by byte, in
8282 increasing byte addresses. Each byte is encoded as a two hex
8284 p += 2 * bin2hex (myaddr, p, todo_units * unit_size);
8285 units_written = todo_units;
8288 putpkt_binary (rs->buf, (int) (p - rs->buf));
8289 getpkt (&rs->buf, &rs->buf_size, 0);
8291 if (rs->buf[0] == 'E')
8292 return TARGET_XFER_E_IO;
8294 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8295 send fewer units than we'd planned. */
8296 *xfered_len_units = (ULONGEST) units_written;
8297 return TARGET_XFER_OK;
8300 /* Write memory data directly to the remote machine.
8301 This does not inform the data cache; the data cache uses this.
8302 MEMADDR is the address in the remote memory space.
8303 MYADDR is the address of the buffer in our space.
8304 LEN is the number of bytes.
8306 Return the transferred status, error or OK (an
8307 'enum target_xfer_status' value). Save the number of bytes
8308 transferred in *XFERED_LEN. Only transfer a single packet. */
8310 static enum target_xfer_status
8311 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, ULONGEST len,
8312 int unit_size, ULONGEST *xfered_len)
8314 const char *packet_format = NULL;
8316 /* Check whether the target supports binary download. */
8317 check_binary_download (memaddr);
8319 switch (packet_support (PACKET_X))
8322 packet_format = "X";
8324 case PACKET_DISABLE:
8325 packet_format = "M";
8327 case PACKET_SUPPORT_UNKNOWN:
8328 internal_error (__FILE__, __LINE__,
8329 _("remote_write_bytes: bad internal state"));
8331 internal_error (__FILE__, __LINE__, _("bad switch"));
8334 return remote_write_bytes_aux (packet_format,
8335 memaddr, myaddr, len, unit_size, xfered_len,
8336 packet_format[0], 1);
8339 /* Read memory data directly from the remote machine.
8340 This does not use the data cache; the data cache uses this.
8341 MEMADDR is the address in the remote memory space.
8342 MYADDR is the address of the buffer in our space.
8343 LEN_UNITS is the number of addressable memory units to read..
8344 UNIT_SIZE is the length in bytes of an addressable unit.
8346 Return the transferred status, error or OK (an
8347 'enum target_xfer_status' value). Save the number of bytes
8348 transferred in *XFERED_LEN_UNITS.
8350 See the comment of remote_write_bytes_aux for an example of
8351 memory read/write exchange between gdb and the stub. */
8353 static enum target_xfer_status
8354 remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr, ULONGEST len_units,
8355 int unit_size, ULONGEST *xfered_len_units)
8357 struct remote_state *rs = get_remote_state ();
8358 int buf_size_bytes; /* Max size of packet output buffer. */
8363 buf_size_bytes = get_memory_read_packet_size ();
8364 /* The packet buffer will be large enough for the payload;
8365 get_memory_packet_size ensures this. */
8367 /* Number of units that will fit. */
8368 todo_units = std::min (len_units,
8369 (ULONGEST) (buf_size_bytes / unit_size) / 2);
8371 /* Construct "m"<memaddr>","<len>". */
8372 memaddr = remote_address_masked (memaddr);
8375 p += hexnumstr (p, (ULONGEST) memaddr);
8377 p += hexnumstr (p, (ULONGEST) todo_units);
8380 getpkt (&rs->buf, &rs->buf_size, 0);
8381 if (rs->buf[0] == 'E'
8382 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
8383 && rs->buf[3] == '\0')
8384 return TARGET_XFER_E_IO;
8385 /* Reply describes memory byte by byte, each byte encoded as two hex
8388 decoded_bytes = hex2bin (p, myaddr, todo_units * unit_size);
8389 /* Return what we have. Let higher layers handle partial reads. */
8390 *xfered_len_units = (ULONGEST) (decoded_bytes / unit_size);
8391 return TARGET_XFER_OK;
8394 /* Using the set of read-only target sections of remote, read live
8397 For interface/parameters/return description see target.h,
8400 static enum target_xfer_status
8401 remote_xfer_live_readonly_partial (struct target_ops *ops, gdb_byte *readbuf,
8402 ULONGEST memaddr, ULONGEST len,
8403 int unit_size, ULONGEST *xfered_len)
8405 struct target_section *secp;
8406 struct target_section_table *table;
8408 secp = target_section_by_addr (ops, memaddr);
8410 && (bfd_get_section_flags (secp->the_bfd_section->owner,
8411 secp->the_bfd_section)
8414 struct target_section *p;
8415 ULONGEST memend = memaddr + len;
8417 table = target_get_section_table (ops);
8419 for (p = table->sections; p < table->sections_end; p++)
8421 if (memaddr >= p->addr)
8423 if (memend <= p->endaddr)
8425 /* Entire transfer is within this section. */
8426 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
8429 else if (memaddr >= p->endaddr)
8431 /* This section ends before the transfer starts. */
8436 /* This section overlaps the transfer. Just do half. */
8437 len = p->endaddr - memaddr;
8438 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
8445 return TARGET_XFER_EOF;
8448 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8449 first if the requested memory is unavailable in traceframe.
8450 Otherwise, fall back to remote_read_bytes_1. */
8452 static enum target_xfer_status
8453 remote_read_bytes (struct target_ops *ops, CORE_ADDR memaddr,
8454 gdb_byte *myaddr, ULONGEST len, int unit_size,
8455 ULONGEST *xfered_len)
8458 return TARGET_XFER_EOF;
8460 if (get_traceframe_number () != -1)
8462 std::vector<mem_range> available;
8464 /* If we fail to get the set of available memory, then the
8465 target does not support querying traceframe info, and so we
8466 attempt reading from the traceframe anyway (assuming the
8467 target implements the old QTro packet then). */
8468 if (traceframe_available_memory (&available, memaddr, len))
8470 if (available.empty () || available[0].start != memaddr)
8472 enum target_xfer_status res;
8474 /* Don't read into the traceframe's available
8476 if (!available.empty ())
8478 LONGEST oldlen = len;
8480 len = available[0].start - memaddr;
8481 gdb_assert (len <= oldlen);
8484 /* This goes through the topmost target again. */
8485 res = remote_xfer_live_readonly_partial (ops, myaddr, memaddr,
8486 len, unit_size, xfered_len);
8487 if (res == TARGET_XFER_OK)
8488 return TARGET_XFER_OK;
8491 /* No use trying further, we know some memory starting
8492 at MEMADDR isn't available. */
8494 return TARGET_XFER_UNAVAILABLE;
8498 /* Don't try to read more than how much is available, in
8499 case the target implements the deprecated QTro packet to
8500 cater for older GDBs (the target's knowledge of read-only
8501 sections may be outdated by now). */
8502 len = available[0].length;
8506 return remote_read_bytes_1 (memaddr, myaddr, len, unit_size, xfered_len);
8511 /* Sends a packet with content determined by the printf format string
8512 FORMAT and the remaining arguments, then gets the reply. Returns
8513 whether the packet was a success, a failure, or unknown. */
8515 static enum packet_result remote_send_printf (const char *format, ...)
8516 ATTRIBUTE_PRINTF (1, 2);
8518 static enum packet_result
8519 remote_send_printf (const char *format, ...)
8521 struct remote_state *rs = get_remote_state ();
8522 int max_size = get_remote_packet_size ();
8525 va_start (ap, format);
8528 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
8529 internal_error (__FILE__, __LINE__, _("Too long remote packet."));
8531 if (putpkt (rs->buf) < 0)
8532 error (_("Communication problem with target."));
8535 getpkt (&rs->buf, &rs->buf_size, 0);
8537 return packet_check_result (rs->buf);
8540 /* Flash writing can take quite some time. We'll set
8541 effectively infinite timeout for flash operations.
8542 In future, we'll need to decide on a better approach. */
8543 static const int remote_flash_timeout = 1000;
8546 remote_flash_erase (struct target_ops *ops,
8547 ULONGEST address, LONGEST length)
8549 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
8550 enum packet_result ret;
8551 scoped_restore restore_timeout
8552 = make_scoped_restore (&remote_timeout, remote_flash_timeout);
8554 ret = remote_send_printf ("vFlashErase:%s,%s",
8555 phex (address, addr_size),
8559 case PACKET_UNKNOWN:
8560 error (_("Remote target does not support flash erase"));
8562 error (_("Error erasing flash with vFlashErase packet"));
8568 static enum target_xfer_status
8569 remote_flash_write (struct target_ops *ops, ULONGEST address,
8570 ULONGEST length, ULONGEST *xfered_len,
8571 const gdb_byte *data)
8573 scoped_restore restore_timeout
8574 = make_scoped_restore (&remote_timeout, remote_flash_timeout);
8575 return remote_write_bytes_aux ("vFlashWrite:", address, data, length, 1,
8580 remote_flash_done (struct target_ops *ops)
8584 scoped_restore restore_timeout
8585 = make_scoped_restore (&remote_timeout, remote_flash_timeout);
8587 ret = remote_send_printf ("vFlashDone");
8591 case PACKET_UNKNOWN:
8592 error (_("Remote target does not support vFlashDone"));
8594 error (_("Error finishing flash operation"));
8601 remote_files_info (struct target_ops *ignore)
8603 puts_filtered ("Debugging a target over a serial line.\n");
8606 /* Stuff for dealing with the packets which are part of this protocol.
8607 See comment at top of file for details. */
8609 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8610 error to higher layers. Called when a serial error is detected.
8611 The exception message is STRING, followed by a colon and a blank,
8612 the system error message for errno at function entry and final dot
8613 for output compatibility with throw_perror_with_name. */
8616 unpush_and_perror (const char *string)
8618 int saved_errno = errno;
8620 remote_unpush_target ();
8621 throw_error (TARGET_CLOSE_ERROR, "%s: %s.", string,
8622 safe_strerror (saved_errno));
8625 /* Read a single character from the remote end. The current quit
8626 handler is overridden to avoid quitting in the middle of packet
8627 sequence, as that would break communication with the remote server.
8628 See remote_serial_quit_handler for more detail. */
8631 readchar (int timeout)
8634 struct remote_state *rs = get_remote_state ();
8637 scoped_restore restore_quit
8638 = make_scoped_restore (&quit_handler, remote_serial_quit_handler);
8640 rs->got_ctrlc_during_io = 0;
8642 ch = serial_readchar (rs->remote_desc, timeout);
8644 if (rs->got_ctrlc_during_io)
8651 switch ((enum serial_rc) ch)
8654 remote_unpush_target ();
8655 throw_error (TARGET_CLOSE_ERROR, _("Remote connection closed"));
8658 unpush_and_perror (_("Remote communication error. "
8659 "Target disconnected."));
8661 case SERIAL_TIMEOUT:
8667 /* Wrapper for serial_write that closes the target and throws if
8668 writing fails. The current quit handler is overridden to avoid
8669 quitting in the middle of packet sequence, as that would break
8670 communication with the remote server. See
8671 remote_serial_quit_handler for more detail. */
8674 remote_serial_write (const char *str, int len)
8676 struct remote_state *rs = get_remote_state ();
8678 scoped_restore restore_quit
8679 = make_scoped_restore (&quit_handler, remote_serial_quit_handler);
8681 rs->got_ctrlc_during_io = 0;
8683 if (serial_write (rs->remote_desc, str, len))
8685 unpush_and_perror (_("Remote communication error. "
8686 "Target disconnected."));
8689 if (rs->got_ctrlc_during_io)
8693 /* Send the command in *BUF to the remote machine, and read the reply
8694 into *BUF. Report an error if we get an error reply. Resize
8695 *BUF using xrealloc if necessary to hold the result, and update
8699 remote_send (char **buf,
8703 getpkt (buf, sizeof_buf, 0);
8705 if ((*buf)[0] == 'E')
8706 error (_("Remote failure reply: %s"), *buf);
8709 /* Return a string representing an escaped version of BUF, of len N.
8710 E.g. \n is converted to \\n, \t to \\t, etc. */
8713 escape_buffer (const char *buf, int n)
8717 stb.putstrn (buf, n, '\\');
8718 return std::move (stb.string ());
8721 /* Display a null-terminated packet on stdout, for debugging, using C
8725 print_packet (const char *buf)
8727 puts_filtered ("\"");
8728 fputstr_filtered (buf, '"', gdb_stdout);
8729 puts_filtered ("\"");
8733 putpkt (const char *buf)
8735 return putpkt_binary (buf, strlen (buf));
8738 /* Send a packet to the remote machine, with error checking. The data
8739 of the packet is in BUF. The string in BUF can be at most
8740 get_remote_packet_size () - 5 to account for the $, # and checksum,
8741 and for a possible /0 if we are debugging (remote_debug) and want
8742 to print the sent packet as a string. */
8745 putpkt_binary (const char *buf, int cnt)
8747 struct remote_state *rs = get_remote_state ();
8749 unsigned char csum = 0;
8750 gdb::def_vector<char> data (cnt + 6);
8751 char *buf2 = data.data ();
8757 /* Catch cases like trying to read memory or listing threads while
8758 we're waiting for a stop reply. The remote server wouldn't be
8759 ready to handle this request, so we'd hang and timeout. We don't
8760 have to worry about this in synchronous mode, because in that
8761 case it's not possible to issue a command while the target is
8762 running. This is not a problem in non-stop mode, because in that
8763 case, the stub is always ready to process serial input. */
8764 if (!target_is_non_stop_p ()
8765 && target_is_async_p ()
8766 && rs->waiting_for_stop_reply)
8768 error (_("Cannot execute this command while the target is running.\n"
8769 "Use the \"interrupt\" command to stop the target\n"
8770 "and then try again."));
8773 /* We're sending out a new packet. Make sure we don't look at a
8774 stale cached response. */
8775 rs->cached_wait_status = 0;
8777 /* Copy the packet into buffer BUF2, encapsulating it
8778 and giving it a checksum. */
8783 for (i = 0; i < cnt; i++)
8789 *p++ = tohex ((csum >> 4) & 0xf);
8790 *p++ = tohex (csum & 0xf);
8792 /* Send it over and over until we get a positive ack. */
8796 int started_error_output = 0;
8802 int len = (int) (p - buf2);
8805 = escape_buffer (buf2, std::min (len, REMOTE_DEBUG_MAX_CHAR));
8807 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s", str.c_str ());
8809 if (str.length () > REMOTE_DEBUG_MAX_CHAR)
8811 fprintf_unfiltered (gdb_stdlog, "[%zu bytes omitted]",
8812 str.length () - REMOTE_DEBUG_MAX_CHAR);
8815 fprintf_unfiltered (gdb_stdlog, "...");
8817 gdb_flush (gdb_stdlog);
8819 remote_serial_write (buf2, p - buf2);
8821 /* If this is a no acks version of the remote protocol, send the
8822 packet and move on. */
8826 /* Read until either a timeout occurs (-2) or '+' is read.
8827 Handle any notification that arrives in the mean time. */
8830 ch = readchar (remote_timeout);
8838 case SERIAL_TIMEOUT:
8841 if (started_error_output)
8843 putchar_unfiltered ('\n');
8844 started_error_output = 0;
8853 fprintf_unfiltered (gdb_stdlog, "Ack\n");
8857 fprintf_unfiltered (gdb_stdlog, "Nak\n");
8859 case SERIAL_TIMEOUT:
8863 break; /* Retransmit buffer. */
8867 fprintf_unfiltered (gdb_stdlog,
8868 "Packet instead of Ack, ignoring it\n");
8869 /* It's probably an old response sent because an ACK
8870 was lost. Gobble up the packet and ack it so it
8871 doesn't get retransmitted when we resend this
8874 remote_serial_write ("+", 1);
8875 continue; /* Now, go look for +. */
8882 /* If we got a notification, handle it, and go back to looking
8884 /* We've found the start of a notification. Now
8885 collect the data. */
8886 val = read_frame (&rs->buf, &rs->buf_size);
8891 std::string str = escape_buffer (rs->buf, val);
8893 fprintf_unfiltered (gdb_stdlog,
8894 " Notification received: %s\n",
8897 handle_notification (rs->notif_state, rs->buf);
8898 /* We're in sync now, rewait for the ack. */
8905 if (!started_error_output)
8907 started_error_output = 1;
8908 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
8910 fputc_unfiltered (ch & 0177, gdb_stdlog);
8911 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
8920 if (!started_error_output)
8922 started_error_output = 1;
8923 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
8925 fputc_unfiltered (ch & 0177, gdb_stdlog);
8929 break; /* Here to retransmit. */
8933 /* This is wrong. If doing a long backtrace, the user should be
8934 able to get out next time we call QUIT, without anything as
8935 violent as interrupt_query. If we want to provide a way out of
8936 here without getting to the next QUIT, it should be based on
8937 hitting ^C twice as in remote_wait. */
8949 /* Come here after finding the start of a frame when we expected an
8950 ack. Do our best to discard the rest of this packet. */
8959 c = readchar (remote_timeout);
8962 case SERIAL_TIMEOUT:
8963 /* Nothing we can do. */
8966 /* Discard the two bytes of checksum and stop. */
8967 c = readchar (remote_timeout);
8969 c = readchar (remote_timeout);
8972 case '*': /* Run length encoding. */
8973 /* Discard the repeat count. */
8974 c = readchar (remote_timeout);
8979 /* A regular character. */
8985 /* Come here after finding the start of the frame. Collect the rest
8986 into *BUF, verifying the checksum, length, and handling run-length
8987 compression. NUL terminate the buffer. If there is not enough room,
8988 expand *BUF using xrealloc.
8990 Returns -1 on error, number of characters in buffer (ignoring the
8991 trailing NULL) on success. (could be extended to return one of the
8992 SERIAL status indications). */
8995 read_frame (char **buf_p,
9002 struct remote_state *rs = get_remote_state ();
9009 c = readchar (remote_timeout);
9012 case SERIAL_TIMEOUT:
9014 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
9018 fputs_filtered ("Saw new packet start in middle of old one\n",
9020 return -1; /* Start a new packet, count retries. */
9023 unsigned char pktcsum;
9029 check_0 = readchar (remote_timeout);
9031 check_1 = readchar (remote_timeout);
9033 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
9036 fputs_filtered ("Timeout in checksum, retrying\n",
9040 else if (check_0 < 0 || check_1 < 0)
9043 fputs_filtered ("Communication error in checksum\n",
9048 /* Don't recompute the checksum; with no ack packets we
9049 don't have any way to indicate a packet retransmission
9054 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
9055 if (csum == pktcsum)
9060 std::string str = escape_buffer (buf, bc);
9062 fprintf_unfiltered (gdb_stdlog,
9063 "Bad checksum, sentsum=0x%x, "
9064 "csum=0x%x, buf=%s\n",
9065 pktcsum, csum, str.c_str ());
9067 /* Number of characters in buffer ignoring trailing
9071 case '*': /* Run length encoding. */
9076 c = readchar (remote_timeout);
9078 repeat = c - ' ' + 3; /* Compute repeat count. */
9080 /* The character before ``*'' is repeated. */
9082 if (repeat > 0 && repeat <= 255 && bc > 0)
9084 if (bc + repeat - 1 >= *sizeof_buf - 1)
9086 /* Make some more room in the buffer. */
9087 *sizeof_buf += repeat;
9088 *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf);
9092 memset (&buf[bc], buf[bc - 1], repeat);
9098 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
9102 if (bc >= *sizeof_buf - 1)
9104 /* Make some more room in the buffer. */
9106 *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf);
9117 /* Read a packet from the remote machine, with error checking, and
9118 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9119 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9120 rather than timing out; this is used (in synchronous mode) to wait
9121 for a target that is is executing user code to stop. */
9122 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9123 don't have to change all the calls to getpkt to deal with the
9124 return value, because at the moment I don't know what the right
9125 thing to do it for those. */
9131 getpkt_sane (buf, sizeof_buf, forever);
9135 /* Read a packet from the remote machine, with error checking, and
9136 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9137 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9138 rather than timing out; this is used (in synchronous mode) to wait
9139 for a target that is is executing user code to stop. If FOREVER ==
9140 0, this function is allowed to time out gracefully and return an
9141 indication of this to the caller. Otherwise return the number of
9142 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9143 enough reason to return to the caller. *IS_NOTIF is an output
9144 boolean that indicates whether *BUF holds a notification or not
9145 (a regular packet). */
9148 getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
9149 int expecting_notif, int *is_notif)
9151 struct remote_state *rs = get_remote_state ();
9157 /* We're reading a new response. Make sure we don't look at a
9158 previously cached response. */
9159 rs->cached_wait_status = 0;
9161 strcpy (*buf, "timeout");
9164 timeout = watchdog > 0 ? watchdog : -1;
9165 else if (expecting_notif)
9166 timeout = 0; /* There should already be a char in the buffer. If
9169 timeout = remote_timeout;
9173 /* Process any number of notifications, and then return when
9177 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9179 for (tries = 1; tries <= MAX_TRIES; tries++)
9181 /* This can loop forever if the remote side sends us
9182 characters continuously, but if it pauses, we'll get
9183 SERIAL_TIMEOUT from readchar because of timeout. Then
9184 we'll count that as a retry.
9186 Note that even when forever is set, we will only wait
9187 forever prior to the start of a packet. After that, we
9188 expect characters to arrive at a brisk pace. They should
9189 show up within remote_timeout intervals. */
9191 c = readchar (timeout);
9192 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
9194 if (c == SERIAL_TIMEOUT)
9196 if (expecting_notif)
9197 return -1; /* Don't complain, it's normal to not get
9198 anything in this case. */
9200 if (forever) /* Watchdog went off? Kill the target. */
9202 remote_unpush_target ();
9203 throw_error (TARGET_CLOSE_ERROR,
9204 _("Watchdog timeout has expired. "
9205 "Target detached."));
9208 fputs_filtered ("Timed out.\n", gdb_stdlog);
9212 /* We've found the start of a packet or notification.
9213 Now collect the data. */
9214 val = read_frame (buf, sizeof_buf);
9219 remote_serial_write ("-", 1);
9222 if (tries > MAX_TRIES)
9224 /* We have tried hard enough, and just can't receive the
9225 packet/notification. Give up. */
9226 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9228 /* Skip the ack char if we're in no-ack mode. */
9229 if (!rs->noack_mode)
9230 remote_serial_write ("+", 1);
9234 /* If we got an ordinary packet, return that to our caller. */
9240 = escape_buffer (*buf,
9241 std::min (val, REMOTE_DEBUG_MAX_CHAR));
9243 fprintf_unfiltered (gdb_stdlog, "Packet received: %s",
9246 if (str.length () > REMOTE_DEBUG_MAX_CHAR)
9248 fprintf_unfiltered (gdb_stdlog, "[%zu bytes omitted]",
9249 str.length () - REMOTE_DEBUG_MAX_CHAR);
9252 fprintf_unfiltered (gdb_stdlog, "\n");
9255 /* Skip the ack char if we're in no-ack mode. */
9256 if (!rs->noack_mode)
9257 remote_serial_write ("+", 1);
9258 if (is_notif != NULL)
9263 /* If we got a notification, handle it, and go back to looking
9267 gdb_assert (c == '%');
9271 std::string str = escape_buffer (*buf, val);
9273 fprintf_unfiltered (gdb_stdlog,
9274 " Notification received: %s\n",
9277 if (is_notif != NULL)
9280 handle_notification (rs->notif_state, *buf);
9282 /* Notifications require no acknowledgement. */
9284 if (expecting_notif)
9291 getpkt_sane (char **buf, long *sizeof_buf, int forever)
9293 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0, NULL);
9297 getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever,
9300 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1,
9304 /* Check whether EVENT is a fork event for the process specified
9305 by the pid passed in DATA, and if it is, kill the fork child. */
9308 kill_child_of_pending_fork (QUEUE (stop_reply_p) *q,
9309 QUEUE_ITER (stop_reply_p) *iter,
9313 struct queue_iter_param *param = (struct queue_iter_param *) data;
9314 int parent_pid = *(int *) param->input;
9316 if (is_pending_fork_parent (&event->ws, parent_pid, event->ptid))
9318 struct remote_state *rs = get_remote_state ();
9319 int child_pid = ptid_get_pid (event->ws.value.related_pid);
9322 res = remote_vkill (child_pid, rs);
9324 error (_("Can't kill fork child process %d"), child_pid);
9330 /* Kill any new fork children of process PID that haven't been
9331 processed by follow_fork. */
9334 kill_new_fork_children (int pid, struct remote_state *rs)
9336 struct thread_info *thread;
9337 struct notif_client *notif = ¬if_client_stop;
9338 struct queue_iter_param param;
9340 /* Kill the fork child threads of any threads in process PID
9341 that are stopped at a fork event. */
9342 ALL_NON_EXITED_THREADS (thread)
9344 struct target_waitstatus *ws = &thread->pending_follow;
9346 if (is_pending_fork_parent (ws, pid, thread->ptid))
9348 struct remote_state *rs = get_remote_state ();
9349 int child_pid = ptid_get_pid (ws->value.related_pid);
9352 res = remote_vkill (child_pid, rs);
9354 error (_("Can't kill fork child process %d"), child_pid);
9358 /* Check for any pending fork events (not reported or processed yet)
9359 in process PID and kill those fork child threads as well. */
9360 remote_notif_get_pending_events (notif);
9362 param.output = NULL;
9363 QUEUE_iterate (stop_reply_p, stop_reply_queue,
9364 kill_child_of_pending_fork, ¶m);
9368 /* Target hook to kill the current inferior. */
9371 remote_kill (struct target_ops *ops)
9374 int pid = ptid_get_pid (inferior_ptid);
9375 struct remote_state *rs = get_remote_state ();
9377 if (packet_support (PACKET_vKill) != PACKET_DISABLE)
9379 /* If we're stopped while forking and we haven't followed yet,
9380 kill the child task. We need to do this before killing the
9381 parent task because if this is a vfork then the parent will
9383 kill_new_fork_children (pid, rs);
9385 res = remote_vkill (pid, rs);
9388 target_mourn_inferior (inferior_ptid);
9393 /* If we are in 'target remote' mode and we are killing the only
9394 inferior, then we will tell gdbserver to exit and unpush the
9396 if (res == -1 && !remote_multi_process_p (rs)
9397 && number_of_live_inferiors () == 1)
9401 /* We've killed the remote end, we get to mourn it. If we are
9402 not in extended mode, mourning the inferior also unpushes
9403 remote_ops from the target stack, which closes the remote
9405 target_mourn_inferior (inferior_ptid);
9410 error (_("Can't kill process"));
9413 /* Send a kill request to the target using the 'vKill' packet. */
9416 remote_vkill (int pid, struct remote_state *rs)
9418 if (packet_support (PACKET_vKill) == PACKET_DISABLE)
9421 /* Tell the remote target to detach. */
9422 xsnprintf (rs->buf, get_remote_packet_size (), "vKill;%x", pid);
9424 getpkt (&rs->buf, &rs->buf_size, 0);
9426 switch (packet_ok (rs->buf,
9427 &remote_protocol_packets[PACKET_vKill]))
9433 case PACKET_UNKNOWN:
9436 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
9440 /* Send a kill request to the target using the 'k' packet. */
9443 remote_kill_k (void)
9445 /* Catch errors so the user can quit from gdb even when we
9446 aren't on speaking terms with the remote system. */
9451 CATCH (ex, RETURN_MASK_ERROR)
9453 if (ex.error == TARGET_CLOSE_ERROR)
9455 /* If we got an (EOF) error that caused the target
9456 to go away, then we're done, that's what we wanted.
9457 "k" is susceptible to cause a premature EOF, given
9458 that the remote server isn't actually required to
9459 reply to "k", and it can happen that it doesn't
9460 even get to reply ACK to the "k". */
9464 /* Otherwise, something went wrong. We didn't actually kill
9465 the target. Just propagate the exception, and let the
9466 user or higher layers decide what to do. */
9467 throw_exception (ex);
9473 remote_mourn (struct target_ops *target)
9475 struct remote_state *rs = get_remote_state ();
9477 /* In 'target remote' mode with one inferior, we close the connection. */
9478 if (!rs->extended && number_of_live_inferiors () <= 1)
9480 unpush_target (target);
9482 /* remote_close takes care of doing most of the clean up. */
9483 generic_mourn_inferior ();
9487 /* In case we got here due to an error, but we're going to stay
9489 rs->waiting_for_stop_reply = 0;
9491 /* If the current general thread belonged to the process we just
9492 detached from or has exited, the remote side current general
9493 thread becomes undefined. Considering a case like this:
9495 - We just got here due to a detach.
9496 - The process that we're detaching from happens to immediately
9497 report a global breakpoint being hit in non-stop mode, in the
9498 same thread we had selected before.
9499 - GDB attaches to this process again.
9500 - This event happens to be the next event we handle.
9502 GDB would consider that the current general thread didn't need to
9503 be set on the stub side (with Hg), since for all it knew,
9504 GENERAL_THREAD hadn't changed.
9506 Notice that although in all-stop mode, the remote server always
9507 sets the current thread to the thread reporting the stop event,
9508 that doesn't happen in non-stop mode; in non-stop, the stub *must
9509 not* change the current thread when reporting a breakpoint hit,
9510 due to the decoupling of event reporting and event handling.
9512 To keep things simple, we always invalidate our notion of the
9514 record_currthread (rs, minus_one_ptid);
9516 /* Call common code to mark the inferior as not running. */
9517 generic_mourn_inferior ();
9519 if (!have_inferiors ())
9521 if (!remote_multi_process_p (rs))
9523 /* Check whether the target is running now - some remote stubs
9524 automatically restart after kill. */
9526 getpkt (&rs->buf, &rs->buf_size, 0);
9528 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
9530 /* Assume that the target has been restarted. Set
9531 inferior_ptid so that bits of core GDB realizes
9532 there's something here, e.g., so that the user can
9533 say "kill" again. */
9534 inferior_ptid = magic_null_ptid;
9541 extended_remote_supports_disable_randomization (struct target_ops *self)
9543 return packet_support (PACKET_QDisableRandomization) == PACKET_ENABLE;
9547 extended_remote_disable_randomization (int val)
9549 struct remote_state *rs = get_remote_state ();
9552 xsnprintf (rs->buf, get_remote_packet_size (), "QDisableRandomization:%x",
9555 reply = remote_get_noisy_reply ();
9557 error (_("Target does not support QDisableRandomization."));
9558 if (strcmp (reply, "OK") != 0)
9559 error (_("Bogus QDisableRandomization reply from target: %s"), reply);
9563 extended_remote_run (const std::string &args)
9565 struct remote_state *rs = get_remote_state ();
9567 const char *remote_exec_file = get_remote_exec_file ();
9569 /* If the user has disabled vRun support, or we have detected that
9570 support is not available, do not try it. */
9571 if (packet_support (PACKET_vRun) == PACKET_DISABLE)
9574 strcpy (rs->buf, "vRun;");
9575 len = strlen (rs->buf);
9577 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
9578 error (_("Remote file name too long for run packet"));
9579 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len,
9580 strlen (remote_exec_file));
9586 gdb_argv argv (args.c_str ());
9587 for (i = 0; argv[i] != NULL; i++)
9589 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
9590 error (_("Argument list too long for run packet"));
9591 rs->buf[len++] = ';';
9592 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len,
9597 rs->buf[len++] = '\0';
9600 getpkt (&rs->buf, &rs->buf_size, 0);
9602 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]))
9605 /* We have a wait response. All is well. */
9607 case PACKET_UNKNOWN:
9610 if (remote_exec_file[0] == '\0')
9611 error (_("Running the default executable on the remote target failed; "
9612 "try \"set remote exec-file\"?"));
9614 error (_("Running \"%s\" on the remote target failed"),
9617 gdb_assert_not_reached (_("bad switch"));
9621 /* Helper function to send set/unset environment packets. ACTION is
9622 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9623 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9627 send_environment_packet (struct remote_state *rs,
9632 /* Convert the environment variable to an hex string, which
9633 is the best format to be transmitted over the wire. */
9634 std::string encoded_value = bin2hex ((const gdb_byte *) value,
9637 xsnprintf (rs->buf, get_remote_packet_size (),
9638 "%s:%s", packet, encoded_value.c_str ());
9641 getpkt (&rs->buf, &rs->buf_size, 0);
9642 if (strcmp (rs->buf, "OK") != 0)
9643 warning (_("Unable to %s environment variable '%s' on remote."),
9647 /* Helper function to handle the QEnvironment* packets. */
9650 extended_remote_environment_support (struct remote_state *rs)
9652 if (packet_support (PACKET_QEnvironmentReset) != PACKET_DISABLE)
9654 putpkt ("QEnvironmentReset");
9655 getpkt (&rs->buf, &rs->buf_size, 0);
9656 if (strcmp (rs->buf, "OK") != 0)
9657 warning (_("Unable to reset environment on remote."));
9660 gdb_environ *e = ¤t_inferior ()->environment;
9662 if (packet_support (PACKET_QEnvironmentHexEncoded) != PACKET_DISABLE)
9663 for (const std::string &el : e->user_set_env ())
9664 send_environment_packet (rs, "set", "QEnvironmentHexEncoded",
9667 if (packet_support (PACKET_QEnvironmentUnset) != PACKET_DISABLE)
9668 for (const std::string &el : e->user_unset_env ())
9669 send_environment_packet (rs, "unset", "QEnvironmentUnset", el.c_str ());
9672 /* Helper function to set the current working directory for the
9673 inferior in the remote target. */
9676 extended_remote_set_inferior_cwd (struct remote_state *rs)
9678 if (packet_support (PACKET_QSetWorkingDir) != PACKET_DISABLE)
9680 const char *inferior_cwd = get_inferior_cwd ();
9682 if (inferior_cwd != NULL)
9684 std::string hexpath = bin2hex ((const gdb_byte *) inferior_cwd,
9685 strlen (inferior_cwd));
9687 xsnprintf (rs->buf, get_remote_packet_size (),
9688 "QSetWorkingDir:%s", hexpath.c_str ());
9692 /* An empty inferior_cwd means that the user wants us to
9693 reset the remote server's inferior's cwd. */
9694 xsnprintf (rs->buf, get_remote_packet_size (),
9699 getpkt (&rs->buf, &rs->buf_size, 0);
9700 if (packet_ok (rs->buf,
9701 &remote_protocol_packets[PACKET_QSetWorkingDir])
9704 Remote replied unexpectedly while setting the inferior's working\n\
9711 /* In the extended protocol we want to be able to do things like
9712 "run" and have them basically work as expected. So we need
9713 a special create_inferior function. We support changing the
9714 executable file and the command line arguments, but not the
9718 extended_remote_create_inferior (struct target_ops *ops,
9719 const char *exec_file,
9720 const std::string &args,
9721 char **env, int from_tty)
9725 struct remote_state *rs = get_remote_state ();
9726 const char *remote_exec_file = get_remote_exec_file ();
9728 /* If running asynchronously, register the target file descriptor
9729 with the event loop. */
9730 if (target_can_async_p ())
9733 /* Disable address space randomization if requested (and supported). */
9734 if (extended_remote_supports_disable_randomization (ops))
9735 extended_remote_disable_randomization (disable_randomization);
9737 /* If startup-with-shell is on, we inform gdbserver to start the
9738 remote inferior using a shell. */
9739 if (packet_support (PACKET_QStartupWithShell) != PACKET_DISABLE)
9741 xsnprintf (rs->buf, get_remote_packet_size (),
9742 "QStartupWithShell:%d", startup_with_shell ? 1 : 0);
9744 getpkt (&rs->buf, &rs->buf_size, 0);
9745 if (strcmp (rs->buf, "OK") != 0)
9747 Remote replied unexpectedly while setting startup-with-shell: %s"),
9751 extended_remote_environment_support (rs);
9753 extended_remote_set_inferior_cwd (rs);
9755 /* Now restart the remote server. */
9756 run_worked = extended_remote_run (args) != -1;
9759 /* vRun was not supported. Fail if we need it to do what the
9761 if (remote_exec_file[0])
9762 error (_("Remote target does not support \"set remote exec-file\""));
9764 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9766 /* Fall back to "R". */
9767 extended_remote_restart ();
9770 if (!have_inferiors ())
9772 /* Clean up from the last time we ran, before we mark the target
9773 running again. This will mark breakpoints uninserted, and
9774 get_offsets may insert breakpoints. */
9775 init_thread_list ();
9776 init_wait_for_inferior ();
9779 /* vRun's success return is a stop reply. */
9780 stop_reply = run_worked ? rs->buf : NULL;
9781 add_current_inferior_and_thread (stop_reply);
9783 /* Get updated offsets, if the stub uses qOffsets. */
9788 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9789 the list of conditions (in agent expression bytecode format), if any, the
9790 target needs to evaluate. The output is placed into the packet buffer
9791 started from BUF and ended at BUF_END. */
9794 remote_add_target_side_condition (struct gdbarch *gdbarch,
9795 struct bp_target_info *bp_tgt, char *buf,
9798 if (bp_tgt->conditions.empty ())
9801 buf += strlen (buf);
9802 xsnprintf (buf, buf_end - buf, "%s", ";");
9805 /* Send conditions to the target. */
9806 for (agent_expr *aexpr : bp_tgt->conditions)
9808 xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len);
9809 buf += strlen (buf);
9810 for (int i = 0; i < aexpr->len; ++i)
9811 buf = pack_hex_byte (buf, aexpr->buf[i]);
9818 remote_add_target_side_commands (struct gdbarch *gdbarch,
9819 struct bp_target_info *bp_tgt, char *buf)
9821 if (bp_tgt->tcommands.empty ())
9824 buf += strlen (buf);
9826 sprintf (buf, ";cmds:%x,", bp_tgt->persist);
9827 buf += strlen (buf);
9829 /* Concatenate all the agent expressions that are commands into the
9831 for (agent_expr *aexpr : bp_tgt->tcommands)
9833 sprintf (buf, "X%x,", aexpr->len);
9834 buf += strlen (buf);
9835 for (int i = 0; i < aexpr->len; ++i)
9836 buf = pack_hex_byte (buf, aexpr->buf[i]);
9841 /* Insert a breakpoint. On targets that have software breakpoint
9842 support, we ask the remote target to do the work; on targets
9843 which don't, we insert a traditional memory breakpoint. */
9846 remote_insert_breakpoint (struct target_ops *ops,
9847 struct gdbarch *gdbarch,
9848 struct bp_target_info *bp_tgt)
9850 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9851 If it succeeds, then set the support to PACKET_ENABLE. If it
9852 fails, and the user has explicitly requested the Z support then
9853 report an error, otherwise, mark it disabled and go on. */
9855 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
9857 CORE_ADDR addr = bp_tgt->reqstd_address;
9858 struct remote_state *rs;
9862 /* Make sure the remote is pointing at the right process, if
9864 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9865 set_general_process ();
9867 rs = get_remote_state ();
9869 endbuf = rs->buf + get_remote_packet_size ();
9874 addr = (ULONGEST) remote_address_masked (addr);
9875 p += hexnumstr (p, addr);
9876 xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind);
9878 if (remote_supports_cond_breakpoints (ops))
9879 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
9881 if (remote_can_run_breakpoint_commands (ops))
9882 remote_add_target_side_commands (gdbarch, bp_tgt, p);
9885 getpkt (&rs->buf, &rs->buf_size, 0);
9887 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
9893 case PACKET_UNKNOWN:
9898 /* If this breakpoint has target-side commands but this stub doesn't
9899 support Z0 packets, throw error. */
9900 if (!bp_tgt->tcommands.empty ())
9901 throw_error (NOT_SUPPORTED_ERROR, _("\
9902 Target doesn't support breakpoints that have target side commands."));
9904 return memory_insert_breakpoint (ops, gdbarch, bp_tgt);
9908 remote_remove_breakpoint (struct target_ops *ops,
9909 struct gdbarch *gdbarch,
9910 struct bp_target_info *bp_tgt,
9911 enum remove_bp_reason reason)
9913 CORE_ADDR addr = bp_tgt->placed_address;
9914 struct remote_state *rs = get_remote_state ();
9916 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
9919 char *endbuf = rs->buf + get_remote_packet_size ();
9921 /* Make sure the remote is pointing at the right process, if
9923 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9924 set_general_process ();
9930 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
9931 p += hexnumstr (p, addr);
9932 xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind);
9935 getpkt (&rs->buf, &rs->buf_size, 0);
9937 return (rs->buf[0] == 'E');
9940 return memory_remove_breakpoint (ops, gdbarch, bp_tgt, reason);
9943 static enum Z_packet_type
9944 watchpoint_to_Z_packet (int type)
9949 return Z_PACKET_WRITE_WP;
9952 return Z_PACKET_READ_WP;
9955 return Z_PACKET_ACCESS_WP;
9958 internal_error (__FILE__, __LINE__,
9959 _("hw_bp_to_z: bad watchpoint type %d"), type);
9964 remote_insert_watchpoint (struct target_ops *self, CORE_ADDR addr, int len,
9965 enum target_hw_bp_type type, struct expression *cond)
9967 struct remote_state *rs = get_remote_state ();
9968 char *endbuf = rs->buf + get_remote_packet_size ();
9970 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
9972 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
9975 /* Make sure the remote is pointing at the right process, if
9977 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9978 set_general_process ();
9980 xsnprintf (rs->buf, endbuf - rs->buf, "Z%x,", packet);
9981 p = strchr (rs->buf, '\0');
9982 addr = remote_address_masked (addr);
9983 p += hexnumstr (p, (ULONGEST) addr);
9984 xsnprintf (p, endbuf - p, ",%x", len);
9987 getpkt (&rs->buf, &rs->buf_size, 0);
9989 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
9993 case PACKET_UNKNOWN:
9998 internal_error (__FILE__, __LINE__,
9999 _("remote_insert_watchpoint: reached end of function"));
10003 remote_watchpoint_addr_within_range (struct target_ops *target, CORE_ADDR addr,
10004 CORE_ADDR start, int length)
10006 CORE_ADDR diff = remote_address_masked (addr - start);
10008 return diff < length;
10013 remote_remove_watchpoint (struct target_ops *self, CORE_ADDR addr, int len,
10014 enum target_hw_bp_type type, struct expression *cond)
10016 struct remote_state *rs = get_remote_state ();
10017 char *endbuf = rs->buf + get_remote_packet_size ();
10019 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
10021 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
10024 /* Make sure the remote is pointing at the right process, if
10026 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10027 set_general_process ();
10029 xsnprintf (rs->buf, endbuf - rs->buf, "z%x,", packet);
10030 p = strchr (rs->buf, '\0');
10031 addr = remote_address_masked (addr);
10032 p += hexnumstr (p, (ULONGEST) addr);
10033 xsnprintf (p, endbuf - p, ",%x", len);
10035 getpkt (&rs->buf, &rs->buf_size, 0);
10037 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
10040 case PACKET_UNKNOWN:
10045 internal_error (__FILE__, __LINE__,
10046 _("remote_remove_watchpoint: reached end of function"));
10050 int remote_hw_watchpoint_limit = -1;
10051 int remote_hw_watchpoint_length_limit = -1;
10052 int remote_hw_breakpoint_limit = -1;
10055 remote_region_ok_for_hw_watchpoint (struct target_ops *self,
10056 CORE_ADDR addr, int len)
10058 if (remote_hw_watchpoint_length_limit == 0)
10060 else if (remote_hw_watchpoint_length_limit < 0)
10062 else if (len <= remote_hw_watchpoint_length_limit)
10069 remote_check_watch_resources (struct target_ops *self,
10070 enum bptype type, int cnt, int ot)
10072 if (type == bp_hardware_breakpoint)
10074 if (remote_hw_breakpoint_limit == 0)
10076 else if (remote_hw_breakpoint_limit < 0)
10078 else if (cnt <= remote_hw_breakpoint_limit)
10083 if (remote_hw_watchpoint_limit == 0)
10085 else if (remote_hw_watchpoint_limit < 0)
10089 else if (cnt <= remote_hw_watchpoint_limit)
10095 /* The to_stopped_by_sw_breakpoint method of target remote. */
10098 remote_stopped_by_sw_breakpoint (struct target_ops *ops)
10100 struct thread_info *thread = inferior_thread ();
10102 return (thread->priv != NULL
10103 && thread->priv->stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT);
10106 /* The to_supports_stopped_by_sw_breakpoint method of target
10110 remote_supports_stopped_by_sw_breakpoint (struct target_ops *ops)
10112 return (packet_support (PACKET_swbreak_feature) == PACKET_ENABLE);
10115 /* The to_stopped_by_hw_breakpoint method of target remote. */
10118 remote_stopped_by_hw_breakpoint (struct target_ops *ops)
10120 struct thread_info *thread = inferior_thread ();
10122 return (thread->priv != NULL
10123 && thread->priv->stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT);
10126 /* The to_supports_stopped_by_hw_breakpoint method of target
10130 remote_supports_stopped_by_hw_breakpoint (struct target_ops *ops)
10132 return (packet_support (PACKET_hwbreak_feature) == PACKET_ENABLE);
10136 remote_stopped_by_watchpoint (struct target_ops *ops)
10138 struct thread_info *thread = inferior_thread ();
10140 return (thread->priv != NULL
10141 && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT);
10145 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
10147 struct thread_info *thread = inferior_thread ();
10149 if (thread->priv != NULL
10150 && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT)
10152 *addr_p = thread->priv->watch_data_address;
10161 remote_insert_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
10162 struct bp_target_info *bp_tgt)
10164 CORE_ADDR addr = bp_tgt->reqstd_address;
10165 struct remote_state *rs;
10169 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
10172 /* Make sure the remote is pointing at the right process, if
10174 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10175 set_general_process ();
10177 rs = get_remote_state ();
10179 endbuf = rs->buf + get_remote_packet_size ();
10185 addr = remote_address_masked (addr);
10186 p += hexnumstr (p, (ULONGEST) addr);
10187 xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind);
10189 if (remote_supports_cond_breakpoints (self))
10190 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
10192 if (remote_can_run_breakpoint_commands (self))
10193 remote_add_target_side_commands (gdbarch, bp_tgt, p);
10196 getpkt (&rs->buf, &rs->buf_size, 0);
10198 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
10201 if (rs->buf[1] == '.')
10203 message = strchr (rs->buf + 2, '.');
10205 error (_("Remote failure reply: %s"), message + 1);
10208 case PACKET_UNKNOWN:
10213 internal_error (__FILE__, __LINE__,
10214 _("remote_insert_hw_breakpoint: reached end of function"));
10219 remote_remove_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
10220 struct bp_target_info *bp_tgt)
10223 struct remote_state *rs = get_remote_state ();
10225 char *endbuf = rs->buf + get_remote_packet_size ();
10227 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
10230 /* Make sure the remote is pointing at the right process, if
10232 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10233 set_general_process ();
10239 addr = remote_address_masked (bp_tgt->placed_address);
10240 p += hexnumstr (p, (ULONGEST) addr);
10241 xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind);
10244 getpkt (&rs->buf, &rs->buf_size, 0);
10246 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
10249 case PACKET_UNKNOWN:
10254 internal_error (__FILE__, __LINE__,
10255 _("remote_remove_hw_breakpoint: reached end of function"));
10258 /* Verify memory using the "qCRC:" request. */
10261 remote_verify_memory (struct target_ops *ops,
10262 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
10264 struct remote_state *rs = get_remote_state ();
10265 unsigned long host_crc, target_crc;
10268 /* It doesn't make sense to use qCRC if the remote target is
10269 connected but not running. */
10270 if (target_has_execution && packet_support (PACKET_qCRC) != PACKET_DISABLE)
10272 enum packet_result result;
10274 /* Make sure the remote is pointing at the right process. */
10275 set_general_process ();
10277 /* FIXME: assumes lma can fit into long. */
10278 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
10279 (long) lma, (long) size);
10282 /* Be clever; compute the host_crc before waiting for target
10284 host_crc = xcrc32 (data, size, 0xffffffff);
10286 getpkt (&rs->buf, &rs->buf_size, 0);
10288 result = packet_ok (rs->buf,
10289 &remote_protocol_packets[PACKET_qCRC]);
10290 if (result == PACKET_ERROR)
10292 else if (result == PACKET_OK)
10294 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
10295 target_crc = target_crc * 16 + fromhex (*tmp);
10297 return (host_crc == target_crc);
10301 return simple_verify_memory (ops, data, lma, size);
10304 /* compare-sections command
10306 With no arguments, compares each loadable section in the exec bfd
10307 with the same memory range on the target, and reports mismatches.
10308 Useful for verifying the image on the target against the exec file. */
10311 compare_sections_command (const char *args, int from_tty)
10314 gdb_byte *sectdata;
10315 const char *sectname;
10316 bfd_size_type size;
10319 int mismatched = 0;
10324 error (_("command cannot be used without an exec file"));
10326 /* Make sure the remote is pointing at the right process. */
10327 set_general_process ();
10329 if (args != NULL && strcmp (args, "-r") == 0)
10335 for (s = exec_bfd->sections; s; s = s->next)
10337 if (!(s->flags & SEC_LOAD))
10338 continue; /* Skip non-loadable section. */
10340 if (read_only && (s->flags & SEC_READONLY) == 0)
10341 continue; /* Skip writeable sections */
10343 size = bfd_get_section_size (s);
10345 continue; /* Skip zero-length section. */
10347 sectname = bfd_get_section_name (exec_bfd, s);
10348 if (args && strcmp (args, sectname) != 0)
10349 continue; /* Not the section selected by user. */
10351 matched = 1; /* Do this section. */
10354 gdb::byte_vector sectdata (size);
10355 bfd_get_section_contents (exec_bfd, s, sectdata.data (), 0, size);
10357 res = target_verify_memory (sectdata.data (), lma, size);
10360 error (_("target memory fault, section %s, range %s -- %s"), sectname,
10361 paddress (target_gdbarch (), lma),
10362 paddress (target_gdbarch (), lma + size));
10364 printf_filtered ("Section %s, range %s -- %s: ", sectname,
10365 paddress (target_gdbarch (), lma),
10366 paddress (target_gdbarch (), lma + size));
10368 printf_filtered ("matched.\n");
10371 printf_filtered ("MIS-MATCHED!\n");
10375 if (mismatched > 0)
10376 warning (_("One or more sections of the target image does not match\n\
10377 the loaded file\n"));
10378 if (args && !matched)
10379 printf_filtered (_("No loaded section named '%s'.\n"), args);
10382 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10383 into remote target. The number of bytes written to the remote
10384 target is returned, or -1 for error. */
10386 static enum target_xfer_status
10387 remote_write_qxfer (struct target_ops *ops, const char *object_name,
10388 const char *annex, const gdb_byte *writebuf,
10389 ULONGEST offset, LONGEST len, ULONGEST *xfered_len,
10390 struct packet_config *packet)
10394 struct remote_state *rs = get_remote_state ();
10395 int max_size = get_memory_write_packet_size ();
10397 if (packet->support == PACKET_DISABLE)
10398 return TARGET_XFER_E_IO;
10400 /* Insert header. */
10401 i = snprintf (rs->buf, max_size,
10402 "qXfer:%s:write:%s:%s:",
10403 object_name, annex ? annex : "",
10404 phex_nz (offset, sizeof offset));
10405 max_size -= (i + 1);
10407 /* Escape as much data as fits into rs->buf. */
10408 buf_len = remote_escape_output
10409 (writebuf, len, 1, (gdb_byte *) rs->buf + i, &max_size, max_size);
10411 if (putpkt_binary (rs->buf, i + buf_len) < 0
10412 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
10413 || packet_ok (rs->buf, packet) != PACKET_OK)
10414 return TARGET_XFER_E_IO;
10416 unpack_varlen_hex (rs->buf, &n);
10419 return TARGET_XFER_OK;
10422 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10423 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10424 number of bytes read is returned, or 0 for EOF, or -1 for error.
10425 The number of bytes read may be less than LEN without indicating an
10426 EOF. PACKET is checked and updated to indicate whether the remote
10427 target supports this object. */
10429 static enum target_xfer_status
10430 remote_read_qxfer (struct target_ops *ops, const char *object_name,
10432 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
10433 ULONGEST *xfered_len,
10434 struct packet_config *packet)
10436 struct remote_state *rs = get_remote_state ();
10437 LONGEST i, n, packet_len;
10439 if (packet->support == PACKET_DISABLE)
10440 return TARGET_XFER_E_IO;
10442 /* Check whether we've cached an end-of-object packet that matches
10444 if (rs->finished_object)
10446 if (strcmp (object_name, rs->finished_object) == 0
10447 && strcmp (annex ? annex : "", rs->finished_annex) == 0
10448 && offset == rs->finished_offset)
10449 return TARGET_XFER_EOF;
10452 /* Otherwise, we're now reading something different. Discard
10454 xfree (rs->finished_object);
10455 xfree (rs->finished_annex);
10456 rs->finished_object = NULL;
10457 rs->finished_annex = NULL;
10460 /* Request only enough to fit in a single packet. The actual data
10461 may not, since we don't know how much of it will need to be escaped;
10462 the target is free to respond with slightly less data. We subtract
10463 five to account for the response type and the protocol frame. */
10464 n = std::min<LONGEST> (get_remote_packet_size () - 5, len);
10465 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10466 object_name, annex ? annex : "",
10467 phex_nz (offset, sizeof offset),
10468 phex_nz (n, sizeof n));
10469 i = putpkt (rs->buf);
10471 return TARGET_XFER_E_IO;
10474 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
10475 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
10476 return TARGET_XFER_E_IO;
10478 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
10479 error (_("Unknown remote qXfer reply: %s"), rs->buf);
10481 /* 'm' means there is (or at least might be) more data after this
10482 batch. That does not make sense unless there's at least one byte
10483 of data in this reply. */
10484 if (rs->buf[0] == 'm' && packet_len == 1)
10485 error (_("Remote qXfer reply contained no data."));
10487 /* Got some data. */
10488 i = remote_unescape_input ((gdb_byte *) rs->buf + 1,
10489 packet_len - 1, readbuf, n);
10491 /* 'l' is an EOF marker, possibly including a final block of data,
10492 or possibly empty. If we have the final block of a non-empty
10493 object, record this fact to bypass a subsequent partial read. */
10494 if (rs->buf[0] == 'l' && offset + i > 0)
10496 rs->finished_object = xstrdup (object_name);
10497 rs->finished_annex = xstrdup (annex ? annex : "");
10498 rs->finished_offset = offset + i;
10502 return TARGET_XFER_EOF;
10506 return TARGET_XFER_OK;
10510 static enum target_xfer_status
10511 remote_xfer_partial (struct target_ops *ops, enum target_object object,
10512 const char *annex, gdb_byte *readbuf,
10513 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
10514 ULONGEST *xfered_len)
10516 struct remote_state *rs;
10520 int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
10522 set_remote_traceframe ();
10523 set_general_thread (inferior_ptid);
10525 rs = get_remote_state ();
10527 /* Handle memory using the standard memory routines. */
10528 if (object == TARGET_OBJECT_MEMORY)
10530 /* If the remote target is connected but not running, we should
10531 pass this request down to a lower stratum (e.g. the executable
10533 if (!target_has_execution)
10534 return TARGET_XFER_EOF;
10536 if (writebuf != NULL)
10537 return remote_write_bytes (offset, writebuf, len, unit_size,
10540 return remote_read_bytes (ops, offset, readbuf, len, unit_size,
10544 /* Handle SPU memory using qxfer packets. */
10545 if (object == TARGET_OBJECT_SPU)
10548 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
10549 xfered_len, &remote_protocol_packets
10550 [PACKET_qXfer_spu_read]);
10552 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
10553 xfered_len, &remote_protocol_packets
10554 [PACKET_qXfer_spu_write]);
10557 /* Handle extra signal info using qxfer packets. */
10558 if (object == TARGET_OBJECT_SIGNAL_INFO)
10561 return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len,
10562 xfered_len, &remote_protocol_packets
10563 [PACKET_qXfer_siginfo_read]);
10565 return remote_write_qxfer (ops, "siginfo", annex,
10566 writebuf, offset, len, xfered_len,
10567 &remote_protocol_packets
10568 [PACKET_qXfer_siginfo_write]);
10571 if (object == TARGET_OBJECT_STATIC_TRACE_DATA)
10574 return remote_read_qxfer (ops, "statictrace", annex,
10575 readbuf, offset, len, xfered_len,
10576 &remote_protocol_packets
10577 [PACKET_qXfer_statictrace_read]);
10579 return TARGET_XFER_E_IO;
10582 /* Only handle flash writes. */
10583 if (writebuf != NULL)
10587 case TARGET_OBJECT_FLASH:
10588 return remote_flash_write (ops, offset, len, xfered_len,
10592 return TARGET_XFER_E_IO;
10596 /* Map pre-existing objects onto letters. DO NOT do this for new
10597 objects!!! Instead specify new query packets. */
10600 case TARGET_OBJECT_AVR:
10604 case TARGET_OBJECT_AUXV:
10605 gdb_assert (annex == NULL);
10606 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
10608 &remote_protocol_packets[PACKET_qXfer_auxv]);
10610 case TARGET_OBJECT_AVAILABLE_FEATURES:
10611 return remote_read_qxfer
10612 (ops, "features", annex, readbuf, offset, len, xfered_len,
10613 &remote_protocol_packets[PACKET_qXfer_features]);
10615 case TARGET_OBJECT_LIBRARIES:
10616 return remote_read_qxfer
10617 (ops, "libraries", annex, readbuf, offset, len, xfered_len,
10618 &remote_protocol_packets[PACKET_qXfer_libraries]);
10620 case TARGET_OBJECT_LIBRARIES_SVR4:
10621 return remote_read_qxfer
10622 (ops, "libraries-svr4", annex, readbuf, offset, len, xfered_len,
10623 &remote_protocol_packets[PACKET_qXfer_libraries_svr4]);
10625 case TARGET_OBJECT_MEMORY_MAP:
10626 gdb_assert (annex == NULL);
10627 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
10629 &remote_protocol_packets[PACKET_qXfer_memory_map]);
10631 case TARGET_OBJECT_OSDATA:
10632 /* Should only get here if we're connected. */
10633 gdb_assert (rs->remote_desc);
10634 return remote_read_qxfer
10635 (ops, "osdata", annex, readbuf, offset, len, xfered_len,
10636 &remote_protocol_packets[PACKET_qXfer_osdata]);
10638 case TARGET_OBJECT_THREADS:
10639 gdb_assert (annex == NULL);
10640 return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len,
10642 &remote_protocol_packets[PACKET_qXfer_threads]);
10644 case TARGET_OBJECT_TRACEFRAME_INFO:
10645 gdb_assert (annex == NULL);
10646 return remote_read_qxfer
10647 (ops, "traceframe-info", annex, readbuf, offset, len, xfered_len,
10648 &remote_protocol_packets[PACKET_qXfer_traceframe_info]);
10650 case TARGET_OBJECT_FDPIC:
10651 return remote_read_qxfer (ops, "fdpic", annex, readbuf, offset, len,
10653 &remote_protocol_packets[PACKET_qXfer_fdpic]);
10655 case TARGET_OBJECT_OPENVMS_UIB:
10656 return remote_read_qxfer (ops, "uib", annex, readbuf, offset, len,
10658 &remote_protocol_packets[PACKET_qXfer_uib]);
10660 case TARGET_OBJECT_BTRACE:
10661 return remote_read_qxfer (ops, "btrace", annex, readbuf, offset, len,
10663 &remote_protocol_packets[PACKET_qXfer_btrace]);
10665 case TARGET_OBJECT_BTRACE_CONF:
10666 return remote_read_qxfer (ops, "btrace-conf", annex, readbuf, offset,
10668 &remote_protocol_packets[PACKET_qXfer_btrace_conf]);
10670 case TARGET_OBJECT_EXEC_FILE:
10671 return remote_read_qxfer (ops, "exec-file", annex, readbuf, offset,
10673 &remote_protocol_packets[PACKET_qXfer_exec_file]);
10676 return TARGET_XFER_E_IO;
10679 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10680 large enough let the caller deal with it. */
10681 if (len < get_remote_packet_size ())
10682 return TARGET_XFER_E_IO;
10683 len = get_remote_packet_size ();
10685 /* Except for querying the minimum buffer size, target must be open. */
10686 if (!rs->remote_desc)
10687 error (_("remote query is only available after target open"));
10689 gdb_assert (annex != NULL);
10690 gdb_assert (readbuf != NULL);
10694 *p2++ = query_type;
10696 /* We used one buffer char for the remote protocol q command and
10697 another for the query type. As the remote protocol encapsulation
10698 uses 4 chars plus one extra in case we are debugging
10699 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10702 while (annex[i] && (i < (get_remote_packet_size () - 8)))
10704 /* Bad caller may have sent forbidden characters. */
10705 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
10710 gdb_assert (annex[i] == '\0');
10712 i = putpkt (rs->buf);
10714 return TARGET_XFER_E_IO;
10716 getpkt (&rs->buf, &rs->buf_size, 0);
10717 strcpy ((char *) readbuf, rs->buf);
10719 *xfered_len = strlen ((char *) readbuf);
10720 return TARGET_XFER_OK;
10723 /* Implementation of to_get_memory_xfer_limit. */
10726 remote_get_memory_xfer_limit (struct target_ops *ops)
10728 return get_memory_write_packet_size ();
10732 remote_search_memory (struct target_ops* ops,
10733 CORE_ADDR start_addr, ULONGEST search_space_len,
10734 const gdb_byte *pattern, ULONGEST pattern_len,
10735 CORE_ADDR *found_addrp)
10737 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
10738 struct remote_state *rs = get_remote_state ();
10739 int max_size = get_memory_write_packet_size ();
10740 struct packet_config *packet =
10741 &remote_protocol_packets[PACKET_qSearch_memory];
10742 /* Number of packet bytes used to encode the pattern;
10743 this could be more than PATTERN_LEN due to escape characters. */
10744 int escaped_pattern_len;
10745 /* Amount of pattern that was encodable in the packet. */
10746 int used_pattern_len;
10749 ULONGEST found_addr;
10751 /* Don't go to the target if we don't have to.
10752 This is done before checking packet->support to avoid the possibility that
10753 a success for this edge case means the facility works in general. */
10754 if (pattern_len > search_space_len)
10756 if (pattern_len == 0)
10758 *found_addrp = start_addr;
10762 /* If we already know the packet isn't supported, fall back to the simple
10763 way of searching memory. */
10765 if (packet_config_support (packet) == PACKET_DISABLE)
10767 /* Target doesn't provided special support, fall back and use the
10768 standard support (copy memory and do the search here). */
10769 return simple_search_memory (ops, start_addr, search_space_len,
10770 pattern, pattern_len, found_addrp);
10773 /* Make sure the remote is pointing at the right process. */
10774 set_general_process ();
10776 /* Insert header. */
10777 i = snprintf (rs->buf, max_size,
10778 "qSearch:memory:%s;%s;",
10779 phex_nz (start_addr, addr_size),
10780 phex_nz (search_space_len, sizeof (search_space_len)));
10781 max_size -= (i + 1);
10783 /* Escape as much data as fits into rs->buf. */
10784 escaped_pattern_len =
10785 remote_escape_output (pattern, pattern_len, 1, (gdb_byte *) rs->buf + i,
10786 &used_pattern_len, max_size);
10788 /* Bail if the pattern is too large. */
10789 if (used_pattern_len != pattern_len)
10790 error (_("Pattern is too large to transmit to remote target."));
10792 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
10793 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
10794 || packet_ok (rs->buf, packet) != PACKET_OK)
10796 /* The request may not have worked because the command is not
10797 supported. If so, fall back to the simple way. */
10798 if (packet->support == PACKET_DISABLE)
10800 return simple_search_memory (ops, start_addr, search_space_len,
10801 pattern, pattern_len, found_addrp);
10806 if (rs->buf[0] == '0')
10808 else if (rs->buf[0] == '1')
10811 if (rs->buf[1] != ',')
10812 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
10813 unpack_varlen_hex (rs->buf + 2, &found_addr);
10814 *found_addrp = found_addr;
10817 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
10823 remote_rcmd (struct target_ops *self, const char *command,
10824 struct ui_file *outbuf)
10826 struct remote_state *rs = get_remote_state ();
10829 if (!rs->remote_desc)
10830 error (_("remote rcmd is only available after target open"));
10832 /* Send a NULL command across as an empty command. */
10833 if (command == NULL)
10836 /* The query prefix. */
10837 strcpy (rs->buf, "qRcmd,");
10838 p = strchr (rs->buf, '\0');
10840 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/)
10841 > get_remote_packet_size ())
10842 error (_("\"monitor\" command ``%s'' is too long."), command);
10844 /* Encode the actual command. */
10845 bin2hex ((const gdb_byte *) command, p, strlen (command));
10847 if (putpkt (rs->buf) < 0)
10848 error (_("Communication problem with target."));
10850 /* get/display the response */
10855 /* XXX - see also remote_get_noisy_reply(). */
10856 QUIT; /* Allow user to bail out with ^C. */
10858 if (getpkt_sane (&rs->buf, &rs->buf_size, 0) == -1)
10860 /* Timeout. Continue to (try to) read responses.
10861 This is better than stopping with an error, assuming the stub
10862 is still executing the (long) monitor command.
10863 If needed, the user can interrupt gdb using C-c, obtaining
10864 an effect similar to stop on timeout. */
10868 if (buf[0] == '\0')
10869 error (_("Target does not support this command."));
10870 if (buf[0] == 'O' && buf[1] != 'K')
10872 remote_console_output (buf + 1); /* 'O' message from stub. */
10875 if (strcmp (buf, "OK") == 0)
10877 if (strlen (buf) == 3 && buf[0] == 'E'
10878 && isdigit (buf[1]) && isdigit (buf[2]))
10880 error (_("Protocol error with Rcmd"));
10882 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
10884 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
10886 fputc_unfiltered (c, outbuf);
10892 static VEC(mem_region_s) *
10893 remote_memory_map (struct target_ops *ops)
10895 VEC(mem_region_s) *result = NULL;
10896 char *text = target_read_stralloc (¤t_target,
10897 TARGET_OBJECT_MEMORY_MAP, NULL);
10901 struct cleanup *back_to = make_cleanup (xfree, text);
10903 result = parse_memory_map (text);
10904 do_cleanups (back_to);
10911 packet_command (const char *args, int from_tty)
10913 struct remote_state *rs = get_remote_state ();
10915 if (!rs->remote_desc)
10916 error (_("command can only be used with remote target"));
10919 error (_("remote-packet command requires packet text as argument"));
10921 puts_filtered ("sending: ");
10922 print_packet (args);
10923 puts_filtered ("\n");
10926 getpkt (&rs->buf, &rs->buf_size, 0);
10927 puts_filtered ("received: ");
10928 print_packet (rs->buf);
10929 puts_filtered ("\n");
10933 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10935 static void display_thread_info (struct gdb_ext_thread_info *info);
10937 static void threadset_test_cmd (char *cmd, int tty);
10939 static void threadalive_test (char *cmd, int tty);
10941 static void threadlist_test_cmd (char *cmd, int tty);
10943 int get_and_display_threadinfo (threadref *ref);
10945 static void threadinfo_test_cmd (char *cmd, int tty);
10947 static int thread_display_step (threadref *ref, void *context);
10949 static void threadlist_update_test_cmd (char *cmd, int tty);
10951 static void init_remote_threadtests (void);
10953 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10956 threadset_test_cmd (char *cmd, int tty)
10958 int sample_thread = SAMPLE_THREAD;
10960 printf_filtered (_("Remote threadset test\n"));
10961 set_general_thread (sample_thread);
10966 threadalive_test (char *cmd, int tty)
10968 int sample_thread = SAMPLE_THREAD;
10969 int pid = ptid_get_pid (inferior_ptid);
10970 ptid_t ptid = ptid_build (pid, sample_thread, 0);
10972 if (remote_thread_alive (ptid))
10973 printf_filtered ("PASS: Thread alive test\n");
10975 printf_filtered ("FAIL: Thread alive test\n");
10978 void output_threadid (char *title, threadref *ref);
10981 output_threadid (char *title, threadref *ref)
10985 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
10987 printf_filtered ("%s %s\n", title, (&hexid[0]));
10991 threadlist_test_cmd (char *cmd, int tty)
10994 threadref nextthread;
10995 int done, result_count;
10996 threadref threadlist[3];
10998 printf_filtered ("Remote Threadlist test\n");
10999 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
11000 &result_count, &threadlist[0]))
11001 printf_filtered ("FAIL: threadlist test\n");
11004 threadref *scan = threadlist;
11005 threadref *limit = scan + result_count;
11007 while (scan < limit)
11008 output_threadid (" thread ", scan++);
11013 display_thread_info (struct gdb_ext_thread_info *info)
11015 output_threadid ("Threadid: ", &info->threadid);
11016 printf_filtered ("Name: %s\n ", info->shortname);
11017 printf_filtered ("State: %s\n", info->display);
11018 printf_filtered ("other: %s\n\n", info->more_display);
11022 get_and_display_threadinfo (threadref *ref)
11026 struct gdb_ext_thread_info threadinfo;
11028 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
11029 | TAG_MOREDISPLAY | TAG_DISPLAY;
11030 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
11031 display_thread_info (&threadinfo);
11036 threadinfo_test_cmd (char *cmd, int tty)
11038 int athread = SAMPLE_THREAD;
11042 int_to_threadref (&thread, athread);
11043 printf_filtered ("Remote Threadinfo test\n");
11044 if (!get_and_display_threadinfo (&thread))
11045 printf_filtered ("FAIL cannot get thread info\n");
11049 thread_display_step (threadref *ref, void *context)
11051 /* output_threadid(" threadstep ",ref); *//* simple test */
11052 return get_and_display_threadinfo (ref);
11056 threadlist_update_test_cmd (char *cmd, int tty)
11058 printf_filtered ("Remote Threadlist update test\n");
11059 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
11063 init_remote_threadtests (void)
11065 add_com ("tlist", class_obscure, threadlist_test_cmd,
11066 _("Fetch and print the remote list of "
11067 "thread identifiers, one pkt only"));
11068 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
11069 _("Fetch and display info about one thread"));
11070 add_com ("tset", class_obscure, threadset_test_cmd,
11071 _("Test setting to a different thread"));
11072 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
11073 _("Iterate through updating all remote thread info"));
11074 add_com ("talive", class_obscure, threadalive_test,
11075 _(" Remote thread alive test "));
11080 /* Convert a thread ID to a string. Returns the string in a static
11083 static const char *
11084 remote_pid_to_str (struct target_ops *ops, ptid_t ptid)
11086 static char buf[64];
11087 struct remote_state *rs = get_remote_state ();
11089 if (ptid_equal (ptid, null_ptid))
11090 return normal_pid_to_str (ptid);
11091 else if (ptid_is_pid (ptid))
11093 /* Printing an inferior target id. */
11095 /* When multi-process extensions are off, there's no way in the
11096 remote protocol to know the remote process id, if there's any
11097 at all. There's one exception --- when we're connected with
11098 target extended-remote, and we manually attached to a process
11099 with "attach PID". We don't record anywhere a flag that
11100 allows us to distinguish that case from the case of
11101 connecting with extended-remote and the stub already being
11102 attached to a process, and reporting yes to qAttached, hence
11103 no smart special casing here. */
11104 if (!remote_multi_process_p (rs))
11106 xsnprintf (buf, sizeof buf, "Remote target");
11110 return normal_pid_to_str (ptid);
11114 if (ptid_equal (magic_null_ptid, ptid))
11115 xsnprintf (buf, sizeof buf, "Thread <main>");
11116 else if (remote_multi_process_p (rs))
11117 if (ptid_get_lwp (ptid) == 0)
11118 return normal_pid_to_str (ptid);
11120 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
11121 ptid_get_pid (ptid), ptid_get_lwp (ptid));
11123 xsnprintf (buf, sizeof buf, "Thread %ld",
11124 ptid_get_lwp (ptid));
11129 /* Get the address of the thread local variable in OBJFILE which is
11130 stored at OFFSET within the thread local storage for thread PTID. */
11133 remote_get_thread_local_address (struct target_ops *ops,
11134 ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
11136 if (packet_support (PACKET_qGetTLSAddr) != PACKET_DISABLE)
11138 struct remote_state *rs = get_remote_state ();
11140 char *endp = rs->buf + get_remote_packet_size ();
11141 enum packet_result result;
11143 strcpy (p, "qGetTLSAddr:");
11145 p = write_ptid (p, endp, ptid);
11147 p += hexnumstr (p, offset);
11149 p += hexnumstr (p, lm);
11153 getpkt (&rs->buf, &rs->buf_size, 0);
11154 result = packet_ok (rs->buf,
11155 &remote_protocol_packets[PACKET_qGetTLSAddr]);
11156 if (result == PACKET_OK)
11160 unpack_varlen_hex (rs->buf, &result);
11163 else if (result == PACKET_UNKNOWN)
11164 throw_error (TLS_GENERIC_ERROR,
11165 _("Remote target doesn't support qGetTLSAddr packet"));
11167 throw_error (TLS_GENERIC_ERROR,
11168 _("Remote target failed to process qGetTLSAddr request"));
11171 throw_error (TLS_GENERIC_ERROR,
11172 _("TLS not supported or disabled on this target"));
11177 /* Provide thread local base, i.e. Thread Information Block address.
11178 Returns 1 if ptid is found and thread_local_base is non zero. */
11181 remote_get_tib_address (struct target_ops *self, ptid_t ptid, CORE_ADDR *addr)
11183 if (packet_support (PACKET_qGetTIBAddr) != PACKET_DISABLE)
11185 struct remote_state *rs = get_remote_state ();
11187 char *endp = rs->buf + get_remote_packet_size ();
11188 enum packet_result result;
11190 strcpy (p, "qGetTIBAddr:");
11192 p = write_ptid (p, endp, ptid);
11196 getpkt (&rs->buf, &rs->buf_size, 0);
11197 result = packet_ok (rs->buf,
11198 &remote_protocol_packets[PACKET_qGetTIBAddr]);
11199 if (result == PACKET_OK)
11203 unpack_varlen_hex (rs->buf, &result);
11205 *addr = (CORE_ADDR) result;
11208 else if (result == PACKET_UNKNOWN)
11209 error (_("Remote target doesn't support qGetTIBAddr packet"));
11211 error (_("Remote target failed to process qGetTIBAddr request"));
11214 error (_("qGetTIBAddr not supported or disabled on this target"));
11219 /* Support for inferring a target description based on the current
11220 architecture and the size of a 'g' packet. While the 'g' packet
11221 can have any size (since optional registers can be left off the
11222 end), some sizes are easily recognizable given knowledge of the
11223 approximate architecture. */
11225 struct remote_g_packet_guess
11228 const struct target_desc *tdesc;
11230 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
11231 DEF_VEC_O(remote_g_packet_guess_s);
11233 struct remote_g_packet_data
11235 VEC(remote_g_packet_guess_s) *guesses;
11238 static struct gdbarch_data *remote_g_packet_data_handle;
11241 remote_g_packet_data_init (struct obstack *obstack)
11243 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
11247 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
11248 const struct target_desc *tdesc)
11250 struct remote_g_packet_data *data
11251 = ((struct remote_g_packet_data *)
11252 gdbarch_data (gdbarch, remote_g_packet_data_handle));
11253 struct remote_g_packet_guess new_guess, *guess;
11256 gdb_assert (tdesc != NULL);
11259 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
11261 if (guess->bytes == bytes)
11262 internal_error (__FILE__, __LINE__,
11263 _("Duplicate g packet description added for size %d"),
11266 new_guess.bytes = bytes;
11267 new_guess.tdesc = tdesc;
11268 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
11271 /* Return 1 if remote_read_description would do anything on this target
11272 and architecture, 0 otherwise. */
11275 remote_read_description_p (struct target_ops *target)
11277 struct remote_g_packet_data *data
11278 = ((struct remote_g_packet_data *)
11279 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
11281 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
11287 static const struct target_desc *
11288 remote_read_description (struct target_ops *target)
11290 struct remote_g_packet_data *data
11291 = ((struct remote_g_packet_data *)
11292 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
11294 /* Do not try this during initial connection, when we do not know
11295 whether there is a running but stopped thread. */
11296 if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
11297 return target->beneath->to_read_description (target->beneath);
11299 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
11301 struct remote_g_packet_guess *guess;
11303 int bytes = send_g_packet ();
11306 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
11308 if (guess->bytes == bytes)
11309 return guess->tdesc;
11311 /* We discard the g packet. A minor optimization would be to
11312 hold on to it, and fill the register cache once we have selected
11313 an architecture, but it's too tricky to do safely. */
11316 return target->beneath->to_read_description (target->beneath);
11319 /* Remote file transfer support. This is host-initiated I/O, not
11320 target-initiated; for target-initiated, see remote-fileio.c. */
11322 /* If *LEFT is at least the length of STRING, copy STRING to
11323 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11324 decrease *LEFT. Otherwise raise an error. */
11327 remote_buffer_add_string (char **buffer, int *left, const char *string)
11329 int len = strlen (string);
11332 error (_("Packet too long for target."));
11334 memcpy (*buffer, string, len);
11338 /* NUL-terminate the buffer as a convenience, if there is
11344 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11345 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11346 decrease *LEFT. Otherwise raise an error. */
11349 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
11352 if (2 * len > *left)
11353 error (_("Packet too long for target."));
11355 bin2hex (bytes, *buffer, len);
11356 *buffer += 2 * len;
11359 /* NUL-terminate the buffer as a convenience, if there is
11365 /* If *LEFT is large enough, convert VALUE to hex and add it to
11366 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11367 decrease *LEFT. Otherwise raise an error. */
11370 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
11372 int len = hexnumlen (value);
11375 error (_("Packet too long for target."));
11377 hexnumstr (*buffer, value);
11381 /* NUL-terminate the buffer as a convenience, if there is
11387 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11388 value, *REMOTE_ERRNO to the remote error number or zero if none
11389 was included, and *ATTACHMENT to point to the start of the annex
11390 if any. The length of the packet isn't needed here; there may
11391 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11393 Return 0 if the packet could be parsed, -1 if it could not. If
11394 -1 is returned, the other variables may not be initialized. */
11397 remote_hostio_parse_result (char *buffer, int *retcode,
11398 int *remote_errno, char **attachment)
11403 *attachment = NULL;
11405 if (buffer[0] != 'F')
11409 *retcode = strtol (&buffer[1], &p, 16);
11410 if (errno != 0 || p == &buffer[1])
11413 /* Check for ",errno". */
11417 *remote_errno = strtol (p + 1, &p2, 16);
11418 if (errno != 0 || p + 1 == p2)
11423 /* Check for ";attachment". If there is no attachment, the
11424 packet should end here. */
11427 *attachment = p + 1;
11430 else if (*p == '\0')
11436 /* Send a prepared I/O packet to the target and read its response.
11437 The prepared packet is in the global RS->BUF before this function
11438 is called, and the answer is there when we return.
11440 COMMAND_BYTES is the length of the request to send, which may include
11441 binary data. WHICH_PACKET is the packet configuration to check
11442 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11443 is set to the error number and -1 is returned. Otherwise the value
11444 returned by the function is returned.
11446 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11447 attachment is expected; an error will be reported if there's a
11448 mismatch. If one is found, *ATTACHMENT will be set to point into
11449 the packet buffer and *ATTACHMENT_LEN will be set to the
11450 attachment's length. */
11453 remote_hostio_send_command (int command_bytes, int which_packet,
11454 int *remote_errno, char **attachment,
11455 int *attachment_len)
11457 struct remote_state *rs = get_remote_state ();
11458 int ret, bytes_read;
11459 char *attachment_tmp;
11461 if (!rs->remote_desc
11462 || packet_support (which_packet) == PACKET_DISABLE)
11464 *remote_errno = FILEIO_ENOSYS;
11468 putpkt_binary (rs->buf, command_bytes);
11469 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
11471 /* If it timed out, something is wrong. Don't try to parse the
11473 if (bytes_read < 0)
11475 *remote_errno = FILEIO_EINVAL;
11479 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
11482 *remote_errno = FILEIO_EINVAL;
11484 case PACKET_UNKNOWN:
11485 *remote_errno = FILEIO_ENOSYS;
11491 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
11494 *remote_errno = FILEIO_EINVAL;
11498 /* Make sure we saw an attachment if and only if we expected one. */
11499 if ((attachment_tmp == NULL && attachment != NULL)
11500 || (attachment_tmp != NULL && attachment == NULL))
11502 *remote_errno = FILEIO_EINVAL;
11506 /* If an attachment was found, it must point into the packet buffer;
11507 work out how many bytes there were. */
11508 if (attachment_tmp != NULL)
11510 *attachment = attachment_tmp;
11511 *attachment_len = bytes_read - (*attachment - rs->buf);
11517 /* Invalidate the readahead cache. */
11520 readahead_cache_invalidate (void)
11522 struct remote_state *rs = get_remote_state ();
11524 rs->readahead_cache.fd = -1;
11527 /* Invalidate the readahead cache if it is holding data for FD. */
11530 readahead_cache_invalidate_fd (int fd)
11532 struct remote_state *rs = get_remote_state ();
11534 if (rs->readahead_cache.fd == fd)
11535 rs->readahead_cache.fd = -1;
11538 /* Set the filesystem remote_hostio functions that take FILENAME
11539 arguments will use. Return 0 on success, or -1 if an error
11540 occurs (and set *REMOTE_ERRNO). */
11543 remote_hostio_set_filesystem (struct inferior *inf, int *remote_errno)
11545 struct remote_state *rs = get_remote_state ();
11546 int required_pid = (inf == NULL || inf->fake_pid_p) ? 0 : inf->pid;
11548 int left = get_remote_packet_size () - 1;
11552 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
11555 if (rs->fs_pid != -1 && required_pid == rs->fs_pid)
11558 remote_buffer_add_string (&p, &left, "vFile:setfs:");
11560 xsnprintf (arg, sizeof (arg), "%x", required_pid);
11561 remote_buffer_add_string (&p, &left, arg);
11563 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_setfs,
11564 remote_errno, NULL, NULL);
11566 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
11570 rs->fs_pid = required_pid;
11575 /* Implementation of to_fileio_open. */
11578 remote_hostio_open (struct target_ops *self,
11579 struct inferior *inf, const char *filename,
11580 int flags, int mode, int warn_if_slow,
11583 struct remote_state *rs = get_remote_state ();
11585 int left = get_remote_packet_size () - 1;
11589 static int warning_issued = 0;
11591 printf_unfiltered (_("Reading %s from remote target...\n"),
11594 if (!warning_issued)
11596 warning (_("File transfers from remote targets can be slow."
11597 " Use \"set sysroot\" to access files locally"
11599 warning_issued = 1;
11603 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11606 remote_buffer_add_string (&p, &left, "vFile:open:");
11608 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11609 strlen (filename));
11610 remote_buffer_add_string (&p, &left, ",");
11612 remote_buffer_add_int (&p, &left, flags);
11613 remote_buffer_add_string (&p, &left, ",");
11615 remote_buffer_add_int (&p, &left, mode);
11617 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
11618 remote_errno, NULL, NULL);
11621 /* Implementation of to_fileio_pwrite. */
11624 remote_hostio_pwrite (struct target_ops *self,
11625 int fd, const gdb_byte *write_buf, int len,
11626 ULONGEST offset, int *remote_errno)
11628 struct remote_state *rs = get_remote_state ();
11630 int left = get_remote_packet_size ();
11633 readahead_cache_invalidate_fd (fd);
11635 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
11637 remote_buffer_add_int (&p, &left, fd);
11638 remote_buffer_add_string (&p, &left, ",");
11640 remote_buffer_add_int (&p, &left, offset);
11641 remote_buffer_add_string (&p, &left, ",");
11643 p += remote_escape_output (write_buf, len, 1, (gdb_byte *) p, &out_len,
11644 get_remote_packet_size () - (p - rs->buf));
11646 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
11647 remote_errno, NULL, NULL);
11650 /* Helper for the implementation of to_fileio_pread. Read the file
11651 from the remote side with vFile:pread. */
11654 remote_hostio_pread_vFile (struct target_ops *self,
11655 int fd, gdb_byte *read_buf, int len,
11656 ULONGEST offset, int *remote_errno)
11658 struct remote_state *rs = get_remote_state ();
11661 int left = get_remote_packet_size ();
11662 int ret, attachment_len;
11665 remote_buffer_add_string (&p, &left, "vFile:pread:");
11667 remote_buffer_add_int (&p, &left, fd);
11668 remote_buffer_add_string (&p, &left, ",");
11670 remote_buffer_add_int (&p, &left, len);
11671 remote_buffer_add_string (&p, &left, ",");
11673 remote_buffer_add_int (&p, &left, offset);
11675 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
11676 remote_errno, &attachment,
11682 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11684 if (read_len != ret)
11685 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
11690 /* Serve pread from the readahead cache. Returns number of bytes
11691 read, or 0 if the request can't be served from the cache. */
11694 remote_hostio_pread_from_cache (struct remote_state *rs,
11695 int fd, gdb_byte *read_buf, size_t len,
11698 struct readahead_cache *cache = &rs->readahead_cache;
11700 if (cache->fd == fd
11701 && cache->offset <= offset
11702 && offset < cache->offset + cache->bufsize)
11704 ULONGEST max = cache->offset + cache->bufsize;
11706 if (offset + len > max)
11707 len = max - offset;
11709 memcpy (read_buf, cache->buf + offset - cache->offset, len);
11716 /* Implementation of to_fileio_pread. */
11719 remote_hostio_pread (struct target_ops *self,
11720 int fd, gdb_byte *read_buf, int len,
11721 ULONGEST offset, int *remote_errno)
11724 struct remote_state *rs = get_remote_state ();
11725 struct readahead_cache *cache = &rs->readahead_cache;
11727 ret = remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset);
11730 cache->hit_count++;
11733 fprintf_unfiltered (gdb_stdlog, "readahead cache hit %s\n",
11734 pulongest (cache->hit_count));
11738 cache->miss_count++;
11740 fprintf_unfiltered (gdb_stdlog, "readahead cache miss %s\n",
11741 pulongest (cache->miss_count));
11744 cache->offset = offset;
11745 cache->bufsize = get_remote_packet_size ();
11746 cache->buf = (gdb_byte *) xrealloc (cache->buf, cache->bufsize);
11748 ret = remote_hostio_pread_vFile (self, cache->fd, cache->buf, cache->bufsize,
11749 cache->offset, remote_errno);
11752 readahead_cache_invalidate_fd (fd);
11756 cache->bufsize = ret;
11757 return remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset);
11760 /* Implementation of to_fileio_close. */
11763 remote_hostio_close (struct target_ops *self, int fd, int *remote_errno)
11765 struct remote_state *rs = get_remote_state ();
11767 int left = get_remote_packet_size () - 1;
11769 readahead_cache_invalidate_fd (fd);
11771 remote_buffer_add_string (&p, &left, "vFile:close:");
11773 remote_buffer_add_int (&p, &left, fd);
11775 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
11776 remote_errno, NULL, NULL);
11779 /* Implementation of to_fileio_unlink. */
11782 remote_hostio_unlink (struct target_ops *self,
11783 struct inferior *inf, const char *filename,
11786 struct remote_state *rs = get_remote_state ();
11788 int left = get_remote_packet_size () - 1;
11790 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11793 remote_buffer_add_string (&p, &left, "vFile:unlink:");
11795 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11796 strlen (filename));
11798 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
11799 remote_errno, NULL, NULL);
11802 /* Implementation of to_fileio_readlink. */
11805 remote_hostio_readlink (struct target_ops *self,
11806 struct inferior *inf, const char *filename,
11809 struct remote_state *rs = get_remote_state ();
11812 int left = get_remote_packet_size ();
11813 int len, attachment_len;
11817 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11820 remote_buffer_add_string (&p, &left, "vFile:readlink:");
11822 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11823 strlen (filename));
11825 len = remote_hostio_send_command (p - rs->buf, PACKET_vFile_readlink,
11826 remote_errno, &attachment,
11832 ret = (char *) xmalloc (len + 1);
11834 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11835 (gdb_byte *) ret, len);
11836 if (read_len != len)
11837 error (_("Readlink returned %d, but %d bytes."), len, read_len);
11843 /* Implementation of to_fileio_fstat. */
11846 remote_hostio_fstat (struct target_ops *self,
11847 int fd, struct stat *st,
11850 struct remote_state *rs = get_remote_state ();
11852 int left = get_remote_packet_size ();
11853 int attachment_len, ret;
11855 struct fio_stat fst;
11858 remote_buffer_add_string (&p, &left, "vFile:fstat:");
11860 remote_buffer_add_int (&p, &left, fd);
11862 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_fstat,
11863 remote_errno, &attachment,
11867 if (*remote_errno != FILEIO_ENOSYS)
11870 /* Strictly we should return -1, ENOSYS here, but when
11871 "set sysroot remote:" was implemented in August 2008
11872 BFD's need for a stat function was sidestepped with
11873 this hack. This was not remedied until March 2015
11874 so we retain the previous behavior to avoid breaking
11877 Note that the memset is a March 2015 addition; older
11878 GDBs set st_size *and nothing else* so the structure
11879 would have garbage in all other fields. This might
11880 break something but retaining the previous behavior
11881 here would be just too wrong. */
11883 memset (st, 0, sizeof (struct stat));
11884 st->st_size = INT_MAX;
11888 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11889 (gdb_byte *) &fst, sizeof (fst));
11891 if (read_len != ret)
11892 error (_("vFile:fstat returned %d, but %d bytes."), ret, read_len);
11894 if (read_len != sizeof (fst))
11895 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11896 read_len, (int) sizeof (fst));
11898 remote_fileio_to_host_stat (&fst, st);
11903 /* Implementation of to_filesystem_is_local. */
11906 remote_filesystem_is_local (struct target_ops *self)
11908 /* Valgrind GDB presents itself as a remote target but works
11909 on the local filesystem: it does not implement remote get
11910 and users are not expected to set a sysroot. To handle
11911 this case we treat the remote filesystem as local if the
11912 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11913 does not support vFile:open. */
11914 if (strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) == 0)
11916 enum packet_support ps = packet_support (PACKET_vFile_open);
11918 if (ps == PACKET_SUPPORT_UNKNOWN)
11920 int fd, remote_errno;
11922 /* Try opening a file to probe support. The supplied
11923 filename is irrelevant, we only care about whether
11924 the stub recognizes the packet or not. */
11925 fd = remote_hostio_open (self, NULL, "just probing",
11926 FILEIO_O_RDONLY, 0700, 0,
11930 remote_hostio_close (self, fd, &remote_errno);
11932 ps = packet_support (PACKET_vFile_open);
11935 if (ps == PACKET_DISABLE)
11937 static int warning_issued = 0;
11939 if (!warning_issued)
11941 warning (_("remote target does not support file"
11942 " transfer, attempting to access files"
11943 " from local filesystem."));
11944 warning_issued = 1;
11955 remote_fileio_errno_to_host (int errnum)
11961 case FILEIO_ENOENT:
11969 case FILEIO_EACCES:
11971 case FILEIO_EFAULT:
11975 case FILEIO_EEXIST:
11977 case FILEIO_ENODEV:
11979 case FILEIO_ENOTDIR:
11981 case FILEIO_EISDIR:
11983 case FILEIO_EINVAL:
11985 case FILEIO_ENFILE:
11987 case FILEIO_EMFILE:
11991 case FILEIO_ENOSPC:
11993 case FILEIO_ESPIPE:
11997 case FILEIO_ENOSYS:
11999 case FILEIO_ENAMETOOLONG:
12000 return ENAMETOOLONG;
12006 remote_hostio_error (int errnum)
12008 int host_error = remote_fileio_errno_to_host (errnum);
12010 if (host_error == -1)
12011 error (_("Unknown remote I/O error %d"), errnum);
12013 error (_("Remote I/O error: %s"), safe_strerror (host_error));
12017 remote_hostio_close_cleanup (void *opaque)
12019 int fd = *(int *) opaque;
12022 remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno);
12026 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
12028 struct cleanup *back_to, *close_cleanup;
12029 int retcode, fd, remote_errno, bytes, io_size;
12031 int bytes_in_buffer;
12034 struct remote_state *rs = get_remote_state ();
12036 if (!rs->remote_desc)
12037 error (_("command can only be used with remote target"));
12039 gdb_file_up file = gdb_fopen_cloexec (local_file, "rb");
12041 perror_with_name (local_file);
12043 fd = remote_hostio_open (find_target_at (process_stratum), NULL,
12044 remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
12046 0700, 0, &remote_errno);
12048 remote_hostio_error (remote_errno);
12050 /* Send up to this many bytes at once. They won't all fit in the
12051 remote packet limit, so we'll transfer slightly fewer. */
12052 io_size = get_remote_packet_size ();
12053 buffer = (gdb_byte *) xmalloc (io_size);
12054 back_to = make_cleanup (xfree, buffer);
12056 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
12058 bytes_in_buffer = 0;
12061 while (bytes_in_buffer || !saw_eof)
12065 bytes = fread (buffer + bytes_in_buffer, 1,
12066 io_size - bytes_in_buffer,
12070 if (ferror (file.get ()))
12071 error (_("Error reading %s."), local_file);
12074 /* EOF. Unless there is something still in the
12075 buffer from the last iteration, we are done. */
12077 if (bytes_in_buffer == 0)
12085 bytes += bytes_in_buffer;
12086 bytes_in_buffer = 0;
12088 retcode = remote_hostio_pwrite (find_target_at (process_stratum),
12090 offset, &remote_errno);
12093 remote_hostio_error (remote_errno);
12094 else if (retcode == 0)
12095 error (_("Remote write of %d bytes returned 0!"), bytes);
12096 else if (retcode < bytes)
12098 /* Short write. Save the rest of the read data for the next
12100 bytes_in_buffer = bytes - retcode;
12101 memmove (buffer, buffer + retcode, bytes_in_buffer);
12107 discard_cleanups (close_cleanup);
12108 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
12109 remote_hostio_error (remote_errno);
12112 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
12113 do_cleanups (back_to);
12117 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
12119 struct cleanup *back_to, *close_cleanup;
12120 int fd, remote_errno, bytes, io_size;
12123 struct remote_state *rs = get_remote_state ();
12125 if (!rs->remote_desc)
12126 error (_("command can only be used with remote target"));
12128 fd = remote_hostio_open (find_target_at (process_stratum), NULL,
12129 remote_file, FILEIO_O_RDONLY, 0, 0,
12132 remote_hostio_error (remote_errno);
12134 gdb_file_up file = gdb_fopen_cloexec (local_file, "wb");
12136 perror_with_name (local_file);
12138 /* Send up to this many bytes at once. They won't all fit in the
12139 remote packet limit, so we'll transfer slightly fewer. */
12140 io_size = get_remote_packet_size ();
12141 buffer = (gdb_byte *) xmalloc (io_size);
12142 back_to = make_cleanup (xfree, buffer);
12144 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
12149 bytes = remote_hostio_pread (find_target_at (process_stratum),
12150 fd, buffer, io_size, offset, &remote_errno);
12152 /* Success, but no bytes, means end-of-file. */
12155 remote_hostio_error (remote_errno);
12159 bytes = fwrite (buffer, 1, bytes, file.get ());
12161 perror_with_name (local_file);
12164 discard_cleanups (close_cleanup);
12165 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
12166 remote_hostio_error (remote_errno);
12169 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
12170 do_cleanups (back_to);
12174 remote_file_delete (const char *remote_file, int from_tty)
12176 int retcode, remote_errno;
12177 struct remote_state *rs = get_remote_state ();
12179 if (!rs->remote_desc)
12180 error (_("command can only be used with remote target"));
12182 retcode = remote_hostio_unlink (find_target_at (process_stratum),
12183 NULL, remote_file, &remote_errno);
12185 remote_hostio_error (remote_errno);
12188 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
12192 remote_put_command (const char *args, int from_tty)
12195 error_no_arg (_("file to put"));
12197 gdb_argv argv (args);
12198 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
12199 error (_("Invalid parameters to remote put"));
12201 remote_file_put (argv[0], argv[1], from_tty);
12205 remote_get_command (const char *args, int from_tty)
12208 error_no_arg (_("file to get"));
12210 gdb_argv argv (args);
12211 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
12212 error (_("Invalid parameters to remote get"));
12214 remote_file_get (argv[0], argv[1], from_tty);
12218 remote_delete_command (const char *args, int from_tty)
12221 error_no_arg (_("file to delete"));
12223 gdb_argv argv (args);
12224 if (argv[0] == NULL || argv[1] != NULL)
12225 error (_("Invalid parameters to remote delete"));
12227 remote_file_delete (argv[0], from_tty);
12231 remote_command (const char *args, int from_tty)
12233 help_list (remote_cmdlist, "remote ", all_commands, gdb_stdout);
12237 remote_can_execute_reverse (struct target_ops *self)
12239 if (packet_support (PACKET_bs) == PACKET_ENABLE
12240 || packet_support (PACKET_bc) == PACKET_ENABLE)
12247 remote_supports_non_stop (struct target_ops *self)
12253 remote_supports_disable_randomization (struct target_ops *self)
12255 /* Only supported in extended mode. */
12260 remote_supports_multi_process (struct target_ops *self)
12262 struct remote_state *rs = get_remote_state ();
12264 return remote_multi_process_p (rs);
12268 remote_supports_cond_tracepoints (void)
12270 return packet_support (PACKET_ConditionalTracepoints) == PACKET_ENABLE;
12274 remote_supports_cond_breakpoints (struct target_ops *self)
12276 return packet_support (PACKET_ConditionalBreakpoints) == PACKET_ENABLE;
12280 remote_supports_fast_tracepoints (void)
12282 return packet_support (PACKET_FastTracepoints) == PACKET_ENABLE;
12286 remote_supports_static_tracepoints (void)
12288 return packet_support (PACKET_StaticTracepoints) == PACKET_ENABLE;
12292 remote_supports_install_in_trace (void)
12294 return packet_support (PACKET_InstallInTrace) == PACKET_ENABLE;
12298 remote_supports_enable_disable_tracepoint (struct target_ops *self)
12300 return (packet_support (PACKET_EnableDisableTracepoints_feature)
12305 remote_supports_string_tracing (struct target_ops *self)
12307 return packet_support (PACKET_tracenz_feature) == PACKET_ENABLE;
12311 remote_can_run_breakpoint_commands (struct target_ops *self)
12313 return packet_support (PACKET_BreakpointCommands) == PACKET_ENABLE;
12317 remote_trace_init (struct target_ops *self)
12319 struct remote_state *rs = get_remote_state ();
12322 remote_get_noisy_reply ();
12323 if (strcmp (rs->buf, "OK") != 0)
12324 error (_("Target does not support this command."));
12327 static void free_actions_list (char **actions_list);
12328 static void free_actions_list_cleanup_wrapper (void *);
12330 free_actions_list_cleanup_wrapper (void *al)
12332 free_actions_list ((char **) al);
12336 free_actions_list (char **actions_list)
12340 if (actions_list == 0)
12343 for (ndx = 0; actions_list[ndx]; ndx++)
12344 xfree (actions_list[ndx]);
12346 xfree (actions_list);
12349 /* Recursive routine to walk through command list including loops, and
12350 download packets for each command. */
12353 remote_download_command_source (int num, ULONGEST addr,
12354 struct command_line *cmds)
12356 struct remote_state *rs = get_remote_state ();
12357 struct command_line *cmd;
12359 for (cmd = cmds; cmd; cmd = cmd->next)
12361 QUIT; /* Allow user to bail out with ^C. */
12362 strcpy (rs->buf, "QTDPsrc:");
12363 encode_source_string (num, addr, "cmd", cmd->line,
12364 rs->buf + strlen (rs->buf),
12365 rs->buf_size - strlen (rs->buf));
12367 remote_get_noisy_reply ();
12368 if (strcmp (rs->buf, "OK"))
12369 warning (_("Target does not support source download."));
12371 if (cmd->control_type == while_control
12372 || cmd->control_type == while_stepping_control)
12374 remote_download_command_source (num, addr, *cmd->body_list);
12376 QUIT; /* Allow user to bail out with ^C. */
12377 strcpy (rs->buf, "QTDPsrc:");
12378 encode_source_string (num, addr, "cmd", "end",
12379 rs->buf + strlen (rs->buf),
12380 rs->buf_size - strlen (rs->buf));
12382 remote_get_noisy_reply ();
12383 if (strcmp (rs->buf, "OK"))
12384 warning (_("Target does not support source download."));
12390 remote_download_tracepoint (struct target_ops *self, struct bp_location *loc)
12392 #define BUF_SIZE 2048
12396 char buf[BUF_SIZE];
12397 char **tdp_actions;
12398 char **stepping_actions;
12400 struct cleanup *old_chain = NULL;
12402 struct breakpoint *b = loc->owner;
12403 struct tracepoint *t = (struct tracepoint *) b;
12404 struct remote_state *rs = get_remote_state ();
12406 encode_actions_rsp (loc, &tdp_actions, &stepping_actions);
12407 old_chain = make_cleanup (free_actions_list_cleanup_wrapper,
12409 (void) make_cleanup (free_actions_list_cleanup_wrapper,
12412 tpaddr = loc->address;
12413 sprintf_vma (addrbuf, tpaddr);
12414 xsnprintf (buf, BUF_SIZE, "QTDP:%x:%s:%c:%lx:%x", b->number,
12415 addrbuf, /* address */
12416 (b->enable_state == bp_enabled ? 'E' : 'D'),
12417 t->step_count, t->pass_count);
12418 /* Fast tracepoints are mostly handled by the target, but we can
12419 tell the target how big of an instruction block should be moved
12421 if (b->type == bp_fast_tracepoint)
12423 /* Only test for support at download time; we may not know
12424 target capabilities at definition time. */
12425 if (remote_supports_fast_tracepoints ())
12427 if (gdbarch_fast_tracepoint_valid_at (loc->gdbarch, tpaddr,
12429 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":F%x",
12430 gdb_insn_length (loc->gdbarch, tpaddr));
12432 /* If it passed validation at definition but fails now,
12433 something is very wrong. */
12434 internal_error (__FILE__, __LINE__,
12435 _("Fast tracepoint not "
12436 "valid during download"));
12439 /* Fast tracepoints are functionally identical to regular
12440 tracepoints, so don't take lack of support as a reason to
12441 give up on the trace run. */
12442 warning (_("Target does not support fast tracepoints, "
12443 "downloading %d as regular tracepoint"), b->number);
12445 else if (b->type == bp_static_tracepoint)
12447 /* Only test for support at download time; we may not know
12448 target capabilities at definition time. */
12449 if (remote_supports_static_tracepoints ())
12451 struct static_tracepoint_marker marker;
12453 if (target_static_tracepoint_marker_at (tpaddr, &marker))
12454 strcat (buf, ":S");
12456 error (_("Static tracepoint not valid during download"));
12459 /* Fast tracepoints are functionally identical to regular
12460 tracepoints, so don't take lack of support as a reason
12461 to give up on the trace run. */
12462 error (_("Target does not support static tracepoints"));
12464 /* If the tracepoint has a conditional, make it into an agent
12465 expression and append to the definition. */
12468 /* Only test support at download time, we may not know target
12469 capabilities at definition time. */
12470 if (remote_supports_cond_tracepoints ())
12472 agent_expr_up aexpr = gen_eval_for_expr (tpaddr, loc->cond.get ());
12473 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":X%x,",
12475 pkt = buf + strlen (buf);
12476 for (ndx = 0; ndx < aexpr->len; ++ndx)
12477 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
12481 warning (_("Target does not support conditional tracepoints, "
12482 "ignoring tp %d cond"), b->number);
12485 if (b->commands || *default_collect)
12488 remote_get_noisy_reply ();
12489 if (strcmp (rs->buf, "OK"))
12490 error (_("Target does not support tracepoints."));
12492 /* do_single_steps (t); */
12495 for (ndx = 0; tdp_actions[ndx]; ndx++)
12497 QUIT; /* Allow user to bail out with ^C. */
12498 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%c",
12499 b->number, addrbuf, /* address */
12501 ((tdp_actions[ndx + 1] || stepping_actions)
12504 remote_get_noisy_reply ();
12505 if (strcmp (rs->buf, "OK"))
12506 error (_("Error on target while setting tracepoints."));
12509 if (stepping_actions)
12511 for (ndx = 0; stepping_actions[ndx]; ndx++)
12513 QUIT; /* Allow user to bail out with ^C. */
12514 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%s%s",
12515 b->number, addrbuf, /* address */
12516 ((ndx == 0) ? "S" : ""),
12517 stepping_actions[ndx],
12518 (stepping_actions[ndx + 1] ? "-" : ""));
12520 remote_get_noisy_reply ();
12521 if (strcmp (rs->buf, "OK"))
12522 error (_("Error on target while setting tracepoints."));
12526 if (packet_support (PACKET_TracepointSource) == PACKET_ENABLE)
12528 if (b->location != NULL)
12530 strcpy (buf, "QTDPsrc:");
12531 encode_source_string (b->number, loc->address, "at",
12532 event_location_to_string (b->location.get ()),
12533 buf + strlen (buf), 2048 - strlen (buf));
12535 remote_get_noisy_reply ();
12536 if (strcmp (rs->buf, "OK"))
12537 warning (_("Target does not support source download."));
12539 if (b->cond_string)
12541 strcpy (buf, "QTDPsrc:");
12542 encode_source_string (b->number, loc->address,
12543 "cond", b->cond_string, buf + strlen (buf),
12544 2048 - strlen (buf));
12546 remote_get_noisy_reply ();
12547 if (strcmp (rs->buf, "OK"))
12548 warning (_("Target does not support source download."));
12550 remote_download_command_source (b->number, loc->address,
12551 breakpoint_commands (b));
12554 do_cleanups (old_chain);
12558 remote_can_download_tracepoint (struct target_ops *self)
12560 struct remote_state *rs = get_remote_state ();
12561 struct trace_status *ts;
12564 /* Don't try to install tracepoints until we've relocated our
12565 symbols, and fetched and merged the target's tracepoint list with
12567 if (rs->starting_up)
12570 ts = current_trace_status ();
12571 status = remote_get_trace_status (self, ts);
12573 if (status == -1 || !ts->running_known || !ts->running)
12576 /* If we are in a tracing experiment, but remote stub doesn't support
12577 installing tracepoint in trace, we have to return. */
12578 if (!remote_supports_install_in_trace ())
12586 remote_download_trace_state_variable (struct target_ops *self,
12587 struct trace_state_variable *tsv)
12589 struct remote_state *rs = get_remote_state ();
12592 xsnprintf (rs->buf, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12593 tsv->number, phex ((ULONGEST) tsv->initial_value, 8),
12595 p = rs->buf + strlen (rs->buf);
12596 if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ())
12597 error (_("Trace state variable name too long for tsv definition packet"));
12598 p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, strlen (tsv->name));
12601 remote_get_noisy_reply ();
12602 if (*rs->buf == '\0')
12603 error (_("Target does not support this command."));
12604 if (strcmp (rs->buf, "OK") != 0)
12605 error (_("Error on target while downloading trace state variable."));
12609 remote_enable_tracepoint (struct target_ops *self,
12610 struct bp_location *location)
12612 struct remote_state *rs = get_remote_state ();
12615 sprintf_vma (addr_buf, location->address);
12616 xsnprintf (rs->buf, get_remote_packet_size (), "QTEnable:%x:%s",
12617 location->owner->number, addr_buf);
12619 remote_get_noisy_reply ();
12620 if (*rs->buf == '\0')
12621 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12622 if (strcmp (rs->buf, "OK") != 0)
12623 error (_("Error on target while enabling tracepoint."));
12627 remote_disable_tracepoint (struct target_ops *self,
12628 struct bp_location *location)
12630 struct remote_state *rs = get_remote_state ();
12633 sprintf_vma (addr_buf, location->address);
12634 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisable:%x:%s",
12635 location->owner->number, addr_buf);
12637 remote_get_noisy_reply ();
12638 if (*rs->buf == '\0')
12639 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12640 if (strcmp (rs->buf, "OK") != 0)
12641 error (_("Error on target while disabling tracepoint."));
12645 remote_trace_set_readonly_regions (struct target_ops *self)
12649 bfd_size_type size;
12655 return; /* No information to give. */
12657 struct remote_state *rs = get_remote_state ();
12659 strcpy (rs->buf, "QTro");
12660 offset = strlen (rs->buf);
12661 for (s = exec_bfd->sections; s; s = s->next)
12663 char tmp1[40], tmp2[40];
12666 if ((s->flags & SEC_LOAD) == 0 ||
12667 /* (s->flags & SEC_CODE) == 0 || */
12668 (s->flags & SEC_READONLY) == 0)
12672 vma = bfd_get_section_vma (abfd, s);
12673 size = bfd_get_section_size (s);
12674 sprintf_vma (tmp1, vma);
12675 sprintf_vma (tmp2, vma + size);
12676 sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2);
12677 if (offset + sec_length + 1 > rs->buf_size)
12679 if (packet_support (PACKET_qXfer_traceframe_info) != PACKET_ENABLE)
12681 Too many sections for read-only sections definition packet."));
12684 xsnprintf (rs->buf + offset, rs->buf_size - offset, ":%s,%s",
12686 offset += sec_length;
12691 getpkt (&rs->buf, &rs->buf_size, 0);
12696 remote_trace_start (struct target_ops *self)
12698 struct remote_state *rs = get_remote_state ();
12700 putpkt ("QTStart");
12701 remote_get_noisy_reply ();
12702 if (*rs->buf == '\0')
12703 error (_("Target does not support this command."));
12704 if (strcmp (rs->buf, "OK") != 0)
12705 error (_("Bogus reply from target: %s"), rs->buf);
12709 remote_get_trace_status (struct target_ops *self, struct trace_status *ts)
12711 /* Initialize it just to avoid a GCC false warning. */
12713 /* FIXME we need to get register block size some other way. */
12714 extern int trace_regblock_size;
12715 enum packet_result result;
12716 struct remote_state *rs = get_remote_state ();
12718 if (packet_support (PACKET_qTStatus) == PACKET_DISABLE)
12721 trace_regblock_size
12722 = get_remote_arch_state (target_gdbarch ())->sizeof_g_packet;
12724 putpkt ("qTStatus");
12728 p = remote_get_noisy_reply ();
12730 CATCH (ex, RETURN_MASK_ERROR)
12732 if (ex.error != TARGET_CLOSE_ERROR)
12734 exception_fprintf (gdb_stderr, ex, "qTStatus: ");
12737 throw_exception (ex);
12741 result = packet_ok (p, &remote_protocol_packets[PACKET_qTStatus]);
12743 /* If the remote target doesn't do tracing, flag it. */
12744 if (result == PACKET_UNKNOWN)
12747 /* We're working with a live target. */
12748 ts->filename = NULL;
12751 error (_("Bogus trace status reply from target: %s"), rs->buf);
12753 /* Function 'parse_trace_status' sets default value of each field of
12754 'ts' at first, so we don't have to do it here. */
12755 parse_trace_status (p, ts);
12757 return ts->running;
12761 remote_get_tracepoint_status (struct target_ops *self, struct breakpoint *bp,
12762 struct uploaded_tp *utp)
12764 struct remote_state *rs = get_remote_state ();
12766 struct bp_location *loc;
12767 struct tracepoint *tp = (struct tracepoint *) bp;
12768 size_t size = get_remote_packet_size ();
12773 tp->traceframe_usage = 0;
12774 for (loc = tp->loc; loc; loc = loc->next)
12776 /* If the tracepoint was never downloaded, don't go asking for
12778 if (tp->number_on_target == 0)
12780 xsnprintf (rs->buf, size, "qTP:%x:%s", tp->number_on_target,
12781 phex_nz (loc->address, 0));
12783 reply = remote_get_noisy_reply ();
12784 if (reply && *reply)
12787 parse_tracepoint_status (reply + 1, bp, utp);
12793 utp->hit_count = 0;
12794 utp->traceframe_usage = 0;
12795 xsnprintf (rs->buf, size, "qTP:%x:%s", utp->number,
12796 phex_nz (utp->addr, 0));
12798 reply = remote_get_noisy_reply ();
12799 if (reply && *reply)
12802 parse_tracepoint_status (reply + 1, bp, utp);
12808 remote_trace_stop (struct target_ops *self)
12810 struct remote_state *rs = get_remote_state ();
12813 remote_get_noisy_reply ();
12814 if (*rs->buf == '\0')
12815 error (_("Target does not support this command."));
12816 if (strcmp (rs->buf, "OK") != 0)
12817 error (_("Bogus reply from target: %s"), rs->buf);
12821 remote_trace_find (struct target_ops *self,
12822 enum trace_find_type type, int num,
12823 CORE_ADDR addr1, CORE_ADDR addr2,
12826 struct remote_state *rs = get_remote_state ();
12827 char *endbuf = rs->buf + get_remote_packet_size ();
12829 int target_frameno = -1, target_tracept = -1;
12831 /* Lookups other than by absolute frame number depend on the current
12832 trace selected, so make sure it is correct on the remote end
12834 if (type != tfind_number)
12835 set_remote_traceframe ();
12838 strcpy (p, "QTFrame:");
12839 p = strchr (p, '\0');
12843 xsnprintf (p, endbuf - p, "%x", num);
12846 xsnprintf (p, endbuf - p, "pc:%s", phex_nz (addr1, 0));
12849 xsnprintf (p, endbuf - p, "tdp:%x", num);
12852 xsnprintf (p, endbuf - p, "range:%s:%s", phex_nz (addr1, 0),
12853 phex_nz (addr2, 0));
12855 case tfind_outside:
12856 xsnprintf (p, endbuf - p, "outside:%s:%s", phex_nz (addr1, 0),
12857 phex_nz (addr2, 0));
12860 error (_("Unknown trace find type %d"), type);
12864 reply = remote_get_noisy_reply ();
12865 if (*reply == '\0')
12866 error (_("Target does not support this command."));
12868 while (reply && *reply)
12873 target_frameno = (int) strtol (p, &reply, 16);
12875 error (_("Unable to parse trace frame number"));
12876 /* Don't update our remote traceframe number cache on failure
12877 to select a remote traceframe. */
12878 if (target_frameno == -1)
12883 target_tracept = (int) strtol (p, &reply, 16);
12885 error (_("Unable to parse tracepoint number"));
12887 case 'O': /* "OK"? */
12888 if (reply[1] == 'K' && reply[2] == '\0')
12891 error (_("Bogus reply from target: %s"), reply);
12894 error (_("Bogus reply from target: %s"), reply);
12897 *tpp = target_tracept;
12899 rs->remote_traceframe_number = target_frameno;
12900 return target_frameno;
12904 remote_get_trace_state_variable_value (struct target_ops *self,
12905 int tsvnum, LONGEST *val)
12907 struct remote_state *rs = get_remote_state ();
12911 set_remote_traceframe ();
12913 xsnprintf (rs->buf, get_remote_packet_size (), "qTV:%x", tsvnum);
12915 reply = remote_get_noisy_reply ();
12916 if (reply && *reply)
12920 unpack_varlen_hex (reply + 1, &uval);
12921 *val = (LONGEST) uval;
12929 remote_save_trace_data (struct target_ops *self, const char *filename)
12931 struct remote_state *rs = get_remote_state ();
12935 strcpy (p, "QTSave:");
12937 if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ())
12938 error (_("Remote file name too long for trace save packet"));
12939 p += 2 * bin2hex ((gdb_byte *) filename, p, strlen (filename));
12942 reply = remote_get_noisy_reply ();
12943 if (*reply == '\0')
12944 error (_("Target does not support this command."));
12945 if (strcmp (reply, "OK") != 0)
12946 error (_("Bogus reply from target: %s"), reply);
12950 /* This is basically a memory transfer, but needs to be its own packet
12951 because we don't know how the target actually organizes its trace
12952 memory, plus we want to be able to ask for as much as possible, but
12953 not be unhappy if we don't get as much as we ask for. */
12956 remote_get_raw_trace_data (struct target_ops *self,
12957 gdb_byte *buf, ULONGEST offset, LONGEST len)
12959 struct remote_state *rs = get_remote_state ();
12965 strcpy (p, "qTBuffer:");
12967 p += hexnumstr (p, offset);
12969 p += hexnumstr (p, len);
12973 reply = remote_get_noisy_reply ();
12974 if (reply && *reply)
12976 /* 'l' by itself means we're at the end of the buffer and
12977 there is nothing more to get. */
12981 /* Convert the reply into binary. Limit the number of bytes to
12982 convert according to our passed-in buffer size, rather than
12983 what was returned in the packet; if the target is
12984 unexpectedly generous and gives us a bigger reply than we
12985 asked for, we don't want to crash. */
12986 rslt = hex2bin (reply, buf, len);
12990 /* Something went wrong, flag as an error. */
12995 remote_set_disconnected_tracing (struct target_ops *self, int val)
12997 struct remote_state *rs = get_remote_state ();
12999 if (packet_support (PACKET_DisconnectedTracing_feature) == PACKET_ENABLE)
13003 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisconnected:%x", val);
13005 reply = remote_get_noisy_reply ();
13006 if (*reply == '\0')
13007 error (_("Target does not support this command."));
13008 if (strcmp (reply, "OK") != 0)
13009 error (_("Bogus reply from target: %s"), reply);
13012 warning (_("Target does not support disconnected tracing."));
13016 remote_core_of_thread (struct target_ops *ops, ptid_t ptid)
13018 struct thread_info *info = find_thread_ptid (ptid);
13020 if (info && info->priv)
13021 return info->priv->core;
13026 remote_set_circular_trace_buffer (struct target_ops *self, int val)
13028 struct remote_state *rs = get_remote_state ();
13031 xsnprintf (rs->buf, get_remote_packet_size (), "QTBuffer:circular:%x", val);
13033 reply = remote_get_noisy_reply ();
13034 if (*reply == '\0')
13035 error (_("Target does not support this command."));
13036 if (strcmp (reply, "OK") != 0)
13037 error (_("Bogus reply from target: %s"), reply);
13040 static traceframe_info_up
13041 remote_traceframe_info (struct target_ops *self)
13045 text = target_read_stralloc (¤t_target,
13046 TARGET_OBJECT_TRACEFRAME_INFO, NULL);
13049 struct cleanup *back_to = make_cleanup (xfree, text);
13050 traceframe_info_up info = parse_traceframe_info (text);
13052 do_cleanups (back_to);
13059 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13060 instruction on which a fast tracepoint may be placed. Returns -1
13061 if the packet is not supported, and 0 if the minimum instruction
13062 length is unknown. */
13065 remote_get_min_fast_tracepoint_insn_len (struct target_ops *self)
13067 struct remote_state *rs = get_remote_state ();
13070 /* If we're not debugging a process yet, the IPA can't be
13072 if (!target_has_execution)
13075 /* Make sure the remote is pointing at the right process. */
13076 set_general_process ();
13078 xsnprintf (rs->buf, get_remote_packet_size (), "qTMinFTPILen");
13080 reply = remote_get_noisy_reply ();
13081 if (*reply == '\0')
13085 ULONGEST min_insn_len;
13087 unpack_varlen_hex (reply, &min_insn_len);
13089 return (int) min_insn_len;
13094 remote_set_trace_buffer_size (struct target_ops *self, LONGEST val)
13096 if (packet_support (PACKET_QTBuffer_size) != PACKET_DISABLE)
13098 struct remote_state *rs = get_remote_state ();
13099 char *buf = rs->buf;
13100 char *endbuf = rs->buf + get_remote_packet_size ();
13101 enum packet_result result;
13103 gdb_assert (val >= 0 || val == -1);
13104 buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:");
13105 /* Send -1 as literal "-1" to avoid host size dependency. */
13109 buf += hexnumstr (buf, (ULONGEST) -val);
13112 buf += hexnumstr (buf, (ULONGEST) val);
13115 remote_get_noisy_reply ();
13116 result = packet_ok (rs->buf,
13117 &remote_protocol_packets[PACKET_QTBuffer_size]);
13119 if (result != PACKET_OK)
13120 warning (_("Bogus reply from target: %s"), rs->buf);
13125 remote_set_trace_notes (struct target_ops *self,
13126 const char *user, const char *notes,
13127 const char *stop_notes)
13129 struct remote_state *rs = get_remote_state ();
13131 char *buf = rs->buf;
13132 char *endbuf = rs->buf + get_remote_packet_size ();
13135 buf += xsnprintf (buf, endbuf - buf, "QTNotes:");
13138 buf += xsnprintf (buf, endbuf - buf, "user:");
13139 nbytes = bin2hex ((gdb_byte *) user, buf, strlen (user));
13145 buf += xsnprintf (buf, endbuf - buf, "notes:");
13146 nbytes = bin2hex ((gdb_byte *) notes, buf, strlen (notes));
13152 buf += xsnprintf (buf, endbuf - buf, "tstop:");
13153 nbytes = bin2hex ((gdb_byte *) stop_notes, buf, strlen (stop_notes));
13157 /* Ensure the buffer is terminated. */
13161 reply = remote_get_noisy_reply ();
13162 if (*reply == '\0')
13165 if (strcmp (reply, "OK") != 0)
13166 error (_("Bogus reply from target: %s"), reply);
13172 remote_use_agent (struct target_ops *self, int use)
13174 if (packet_support (PACKET_QAgent) != PACKET_DISABLE)
13176 struct remote_state *rs = get_remote_state ();
13178 /* If the stub supports QAgent. */
13179 xsnprintf (rs->buf, get_remote_packet_size (), "QAgent:%d", use);
13181 getpkt (&rs->buf, &rs->buf_size, 0);
13183 if (strcmp (rs->buf, "OK") == 0)
13194 remote_can_use_agent (struct target_ops *self)
13196 return (packet_support (PACKET_QAgent) != PACKET_DISABLE);
13199 struct btrace_target_info
13201 /* The ptid of the traced thread. */
13204 /* The obtained branch trace configuration. */
13205 struct btrace_config conf;
13208 /* Reset our idea of our target's btrace configuration. */
13211 remote_btrace_reset (void)
13213 struct remote_state *rs = get_remote_state ();
13215 memset (&rs->btrace_config, 0, sizeof (rs->btrace_config));
13218 /* Check whether the target supports branch tracing. */
13221 remote_supports_btrace (struct target_ops *self, enum btrace_format format)
13223 if (packet_support (PACKET_Qbtrace_off) != PACKET_ENABLE)
13225 if (packet_support (PACKET_qXfer_btrace) != PACKET_ENABLE)
13230 case BTRACE_FORMAT_NONE:
13233 case BTRACE_FORMAT_BTS:
13234 return (packet_support (PACKET_Qbtrace_bts) == PACKET_ENABLE);
13236 case BTRACE_FORMAT_PT:
13237 /* The trace is decoded on the host. Even if our target supports it,
13238 we still need to have libipt to decode the trace. */
13239 #if defined (HAVE_LIBIPT)
13240 return (packet_support (PACKET_Qbtrace_pt) == PACKET_ENABLE);
13241 #else /* !defined (HAVE_LIBIPT) */
13243 #endif /* !defined (HAVE_LIBIPT) */
13246 internal_error (__FILE__, __LINE__, _("Unknown branch trace format"));
13249 /* Synchronize the configuration with the target. */
13252 btrace_sync_conf (const struct btrace_config *conf)
13254 struct packet_config *packet;
13255 struct remote_state *rs;
13256 char *buf, *pos, *endbuf;
13258 rs = get_remote_state ();
13260 endbuf = buf + get_remote_packet_size ();
13262 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_bts_size];
13263 if (packet_config_support (packet) == PACKET_ENABLE
13264 && conf->bts.size != rs->btrace_config.bts.size)
13267 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
13271 getpkt (&buf, &rs->buf_size, 0);
13273 if (packet_ok (buf, packet) == PACKET_ERROR)
13275 if (buf[0] == 'E' && buf[1] == '.')
13276 error (_("Failed to configure the BTS buffer size: %s"), buf + 2);
13278 error (_("Failed to configure the BTS buffer size."));
13281 rs->btrace_config.bts.size = conf->bts.size;
13284 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_pt_size];
13285 if (packet_config_support (packet) == PACKET_ENABLE
13286 && conf->pt.size != rs->btrace_config.pt.size)
13289 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
13293 getpkt (&buf, &rs->buf_size, 0);
13295 if (packet_ok (buf, packet) == PACKET_ERROR)
13297 if (buf[0] == 'E' && buf[1] == '.')
13298 error (_("Failed to configure the trace buffer size: %s"), buf + 2);
13300 error (_("Failed to configure the trace buffer size."));
13303 rs->btrace_config.pt.size = conf->pt.size;
13307 /* Read the current thread's btrace configuration from the target and
13308 store it into CONF. */
13311 btrace_read_config (struct btrace_config *conf)
13315 xml = target_read_stralloc (¤t_target,
13316 TARGET_OBJECT_BTRACE_CONF, "");
13319 struct cleanup *cleanup;
13321 cleanup = make_cleanup (xfree, xml);
13322 parse_xml_btrace_conf (conf, xml);
13323 do_cleanups (cleanup);
13327 /* Maybe reopen target btrace. */
13330 remote_btrace_maybe_reopen (void)
13332 struct remote_state *rs = get_remote_state ();
13333 struct thread_info *tp;
13334 int btrace_target_pushed = 0;
13337 scoped_restore_current_thread restore_thread;
13339 ALL_NON_EXITED_THREADS (tp)
13341 set_general_thread (tp->ptid);
13343 memset (&rs->btrace_config, 0x00, sizeof (struct btrace_config));
13344 btrace_read_config (&rs->btrace_config);
13346 if (rs->btrace_config.format == BTRACE_FORMAT_NONE)
13349 #if !defined (HAVE_LIBIPT)
13350 if (rs->btrace_config.format == BTRACE_FORMAT_PT)
13355 warning (_("GDB does not support Intel Processor Trace. "
13356 "\"record\" will not work in this session."));
13361 #endif /* !defined (HAVE_LIBIPT) */
13363 /* Push target, once, but before anything else happens. This way our
13364 changes to the threads will be cleaned up by unpushing the target
13365 in case btrace_read_config () throws. */
13366 if (!btrace_target_pushed)
13368 btrace_target_pushed = 1;
13369 record_btrace_push_target ();
13370 printf_filtered (_("Target is recording using %s.\n"),
13371 btrace_format_string (rs->btrace_config.format));
13374 tp->btrace.target = XCNEW (struct btrace_target_info);
13375 tp->btrace.target->ptid = tp->ptid;
13376 tp->btrace.target->conf = rs->btrace_config;
13380 /* Enable branch tracing. */
13382 static struct btrace_target_info *
13383 remote_enable_btrace (struct target_ops *self, ptid_t ptid,
13384 const struct btrace_config *conf)
13386 struct btrace_target_info *tinfo = NULL;
13387 struct packet_config *packet = NULL;
13388 struct remote_state *rs = get_remote_state ();
13389 char *buf = rs->buf;
13390 char *endbuf = rs->buf + get_remote_packet_size ();
13392 switch (conf->format)
13394 case BTRACE_FORMAT_BTS:
13395 packet = &remote_protocol_packets[PACKET_Qbtrace_bts];
13398 case BTRACE_FORMAT_PT:
13399 packet = &remote_protocol_packets[PACKET_Qbtrace_pt];
13403 if (packet == NULL || packet_config_support (packet) != PACKET_ENABLE)
13404 error (_("Target does not support branch tracing."));
13406 btrace_sync_conf (conf);
13408 set_general_thread (ptid);
13410 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
13412 getpkt (&rs->buf, &rs->buf_size, 0);
13414 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
13416 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
13417 error (_("Could not enable branch tracing for %s: %s"),
13418 target_pid_to_str (ptid), rs->buf + 2);
13420 error (_("Could not enable branch tracing for %s."),
13421 target_pid_to_str (ptid));
13424 tinfo = XCNEW (struct btrace_target_info);
13425 tinfo->ptid = ptid;
13427 /* If we fail to read the configuration, we lose some information, but the
13428 tracing itself is not impacted. */
13431 btrace_read_config (&tinfo->conf);
13433 CATCH (err, RETURN_MASK_ERROR)
13435 if (err.message != NULL)
13436 warning ("%s", err.message);
13443 /* Disable branch tracing. */
13446 remote_disable_btrace (struct target_ops *self,
13447 struct btrace_target_info *tinfo)
13449 struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_off];
13450 struct remote_state *rs = get_remote_state ();
13451 char *buf = rs->buf;
13452 char *endbuf = rs->buf + get_remote_packet_size ();
13454 if (packet_config_support (packet) != PACKET_ENABLE)
13455 error (_("Target does not support branch tracing."));
13457 set_general_thread (tinfo->ptid);
13459 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
13461 getpkt (&rs->buf, &rs->buf_size, 0);
13463 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
13465 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
13466 error (_("Could not disable branch tracing for %s: %s"),
13467 target_pid_to_str (tinfo->ptid), rs->buf + 2);
13469 error (_("Could not disable branch tracing for %s."),
13470 target_pid_to_str (tinfo->ptid));
13476 /* Teardown branch tracing. */
13479 remote_teardown_btrace (struct target_ops *self,
13480 struct btrace_target_info *tinfo)
13482 /* We must not talk to the target during teardown. */
13486 /* Read the branch trace. */
13488 static enum btrace_error
13489 remote_read_btrace (struct target_ops *self,
13490 struct btrace_data *btrace,
13491 struct btrace_target_info *tinfo,
13492 enum btrace_read_type type)
13494 struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace];
13495 struct cleanup *cleanup;
13499 if (packet_config_support (packet) != PACKET_ENABLE)
13500 error (_("Target does not support branch tracing."));
13502 #if !defined(HAVE_LIBEXPAT)
13503 error (_("Cannot process branch tracing result. XML parsing not supported."));
13508 case BTRACE_READ_ALL:
13511 case BTRACE_READ_NEW:
13514 case BTRACE_READ_DELTA:
13518 internal_error (__FILE__, __LINE__,
13519 _("Bad branch tracing read type: %u."),
13520 (unsigned int) type);
13523 xml = target_read_stralloc (¤t_target,
13524 TARGET_OBJECT_BTRACE, annex);
13526 return BTRACE_ERR_UNKNOWN;
13528 cleanup = make_cleanup (xfree, xml);
13529 parse_xml_btrace (btrace, xml);
13530 do_cleanups (cleanup);
13532 return BTRACE_ERR_NONE;
13535 static const struct btrace_config *
13536 remote_btrace_conf (struct target_ops *self,
13537 const struct btrace_target_info *tinfo)
13539 return &tinfo->conf;
13543 remote_augmented_libraries_svr4_read (struct target_ops *self)
13545 return (packet_support (PACKET_augmented_libraries_svr4_read_feature)
13549 /* Implementation of to_load. */
13552 remote_load (struct target_ops *self, const char *name, int from_tty)
13554 generic_load (name, from_tty);
13557 /* Accepts an integer PID; returns a string representing a file that
13558 can be opened on the remote side to get the symbols for the child
13559 process. Returns NULL if the operation is not supported. */
13562 remote_pid_to_exec_file (struct target_ops *self, int pid)
13564 static char *filename = NULL;
13565 struct inferior *inf;
13566 char *annex = NULL;
13568 if (packet_support (PACKET_qXfer_exec_file) != PACKET_ENABLE)
13571 if (filename != NULL)
13574 inf = find_inferior_pid (pid);
13576 internal_error (__FILE__, __LINE__,
13577 _("not currently attached to process %d"), pid);
13579 if (!inf->fake_pid_p)
13581 const int annex_size = 9;
13583 annex = (char *) alloca (annex_size);
13584 xsnprintf (annex, annex_size, "%x", pid);
13587 filename = target_read_stralloc (¤t_target,
13588 TARGET_OBJECT_EXEC_FILE, annex);
13593 /* Implement the to_can_do_single_step target_ops method. */
13596 remote_can_do_single_step (struct target_ops *ops)
13598 /* We can only tell whether target supports single step or not by
13599 supported s and S vCont actions if the stub supports vContSupported
13600 feature. If the stub doesn't support vContSupported feature,
13601 we have conservatively to think target doesn't supports single
13603 if (packet_support (PACKET_vContSupported) == PACKET_ENABLE)
13605 struct remote_state *rs = get_remote_state ();
13607 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
13608 remote_vcont_probe (rs);
13610 return rs->supports_vCont.s && rs->supports_vCont.S;
13616 /* Implementation of the to_execution_direction method for the remote
13619 static enum exec_direction_kind
13620 remote_execution_direction (struct target_ops *self)
13622 struct remote_state *rs = get_remote_state ();
13624 return rs->last_resume_exec_dir;
13627 /* Return pointer to the thread_info struct which corresponds to
13628 THREAD_HANDLE (having length HANDLE_LEN). */
13630 static struct thread_info *
13631 remote_thread_handle_to_thread_info (struct target_ops *ops,
13632 const gdb_byte *thread_handle,
13634 struct inferior *inf)
13636 struct thread_info *tp;
13638 ALL_NON_EXITED_THREADS (tp)
13640 struct private_thread_info *priv = get_private_info_thread (tp);
13642 if (tp->inf == inf && priv != NULL)
13644 if (handle_len != priv->thread_handle->size ())
13645 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
13646 handle_len, priv->thread_handle->size ());
13647 if (memcmp (thread_handle, priv->thread_handle->data (),
13657 init_remote_ops (void)
13659 remote_ops.to_shortname = "remote";
13660 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
13661 remote_ops.to_doc =
13662 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13663 Specify the serial device it is connected to\n\
13664 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13665 remote_ops.to_open = remote_open;
13666 remote_ops.to_close = remote_close;
13667 remote_ops.to_detach = remote_detach;
13668 remote_ops.to_disconnect = remote_disconnect;
13669 remote_ops.to_resume = remote_resume;
13670 remote_ops.to_commit_resume = remote_commit_resume;
13671 remote_ops.to_wait = remote_wait;
13672 remote_ops.to_fetch_registers = remote_fetch_registers;
13673 remote_ops.to_store_registers = remote_store_registers;
13674 remote_ops.to_prepare_to_store = remote_prepare_to_store;
13675 remote_ops.to_files_info = remote_files_info;
13676 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
13677 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
13678 remote_ops.to_stopped_by_sw_breakpoint = remote_stopped_by_sw_breakpoint;
13679 remote_ops.to_supports_stopped_by_sw_breakpoint = remote_supports_stopped_by_sw_breakpoint;
13680 remote_ops.to_stopped_by_hw_breakpoint = remote_stopped_by_hw_breakpoint;
13681 remote_ops.to_supports_stopped_by_hw_breakpoint = remote_supports_stopped_by_hw_breakpoint;
13682 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
13683 remote_ops.to_stopped_data_address = remote_stopped_data_address;
13684 remote_ops.to_watchpoint_addr_within_range =
13685 remote_watchpoint_addr_within_range;
13686 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
13687 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
13688 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
13689 remote_ops.to_region_ok_for_hw_watchpoint
13690 = remote_region_ok_for_hw_watchpoint;
13691 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
13692 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
13693 remote_ops.to_kill = remote_kill;
13694 remote_ops.to_load = remote_load;
13695 remote_ops.to_mourn_inferior = remote_mourn;
13696 remote_ops.to_pass_signals = remote_pass_signals;
13697 remote_ops.to_set_syscall_catchpoint = remote_set_syscall_catchpoint;
13698 remote_ops.to_program_signals = remote_program_signals;
13699 remote_ops.to_thread_alive = remote_thread_alive;
13700 remote_ops.to_thread_name = remote_thread_name;
13701 remote_ops.to_update_thread_list = remote_update_thread_list;
13702 remote_ops.to_pid_to_str = remote_pid_to_str;
13703 remote_ops.to_extra_thread_info = remote_threads_extra_info;
13704 remote_ops.to_get_ada_task_ptid = remote_get_ada_task_ptid;
13705 remote_ops.to_stop = remote_stop;
13706 remote_ops.to_interrupt = remote_interrupt;
13707 remote_ops.to_pass_ctrlc = remote_pass_ctrlc;
13708 remote_ops.to_xfer_partial = remote_xfer_partial;
13709 remote_ops.to_get_memory_xfer_limit = remote_get_memory_xfer_limit;
13710 remote_ops.to_rcmd = remote_rcmd;
13711 remote_ops.to_pid_to_exec_file = remote_pid_to_exec_file;
13712 remote_ops.to_log_command = serial_log_command;
13713 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
13714 remote_ops.to_stratum = process_stratum;
13715 remote_ops.to_has_all_memory = default_child_has_all_memory;
13716 remote_ops.to_has_memory = default_child_has_memory;
13717 remote_ops.to_has_stack = default_child_has_stack;
13718 remote_ops.to_has_registers = default_child_has_registers;
13719 remote_ops.to_has_execution = default_child_has_execution;
13720 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
13721 remote_ops.to_can_execute_reverse = remote_can_execute_reverse;
13722 remote_ops.to_magic = OPS_MAGIC;
13723 remote_ops.to_memory_map = remote_memory_map;
13724 remote_ops.to_flash_erase = remote_flash_erase;
13725 remote_ops.to_flash_done = remote_flash_done;
13726 remote_ops.to_read_description = remote_read_description;
13727 remote_ops.to_search_memory = remote_search_memory;
13728 remote_ops.to_can_async_p = remote_can_async_p;
13729 remote_ops.to_is_async_p = remote_is_async_p;
13730 remote_ops.to_async = remote_async;
13731 remote_ops.to_thread_events = remote_thread_events;
13732 remote_ops.to_can_do_single_step = remote_can_do_single_step;
13733 remote_ops.to_terminal_inferior = remote_terminal_inferior;
13734 remote_ops.to_terminal_ours = remote_terminal_ours;
13735 remote_ops.to_supports_non_stop = remote_supports_non_stop;
13736 remote_ops.to_supports_multi_process = remote_supports_multi_process;
13737 remote_ops.to_supports_disable_randomization
13738 = remote_supports_disable_randomization;
13739 remote_ops.to_filesystem_is_local = remote_filesystem_is_local;
13740 remote_ops.to_fileio_open = remote_hostio_open;
13741 remote_ops.to_fileio_pwrite = remote_hostio_pwrite;
13742 remote_ops.to_fileio_pread = remote_hostio_pread;
13743 remote_ops.to_fileio_fstat = remote_hostio_fstat;
13744 remote_ops.to_fileio_close = remote_hostio_close;
13745 remote_ops.to_fileio_unlink = remote_hostio_unlink;
13746 remote_ops.to_fileio_readlink = remote_hostio_readlink;
13747 remote_ops.to_supports_enable_disable_tracepoint = remote_supports_enable_disable_tracepoint;
13748 remote_ops.to_supports_string_tracing = remote_supports_string_tracing;
13749 remote_ops.to_supports_evaluation_of_breakpoint_conditions = remote_supports_cond_breakpoints;
13750 remote_ops.to_can_run_breakpoint_commands = remote_can_run_breakpoint_commands;
13751 remote_ops.to_trace_init = remote_trace_init;
13752 remote_ops.to_download_tracepoint = remote_download_tracepoint;
13753 remote_ops.to_can_download_tracepoint = remote_can_download_tracepoint;
13754 remote_ops.to_download_trace_state_variable
13755 = remote_download_trace_state_variable;
13756 remote_ops.to_enable_tracepoint = remote_enable_tracepoint;
13757 remote_ops.to_disable_tracepoint = remote_disable_tracepoint;
13758 remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions;
13759 remote_ops.to_trace_start = remote_trace_start;
13760 remote_ops.to_get_trace_status = remote_get_trace_status;
13761 remote_ops.to_get_tracepoint_status = remote_get_tracepoint_status;
13762 remote_ops.to_trace_stop = remote_trace_stop;
13763 remote_ops.to_trace_find = remote_trace_find;
13764 remote_ops.to_get_trace_state_variable_value
13765 = remote_get_trace_state_variable_value;
13766 remote_ops.to_save_trace_data = remote_save_trace_data;
13767 remote_ops.to_upload_tracepoints = remote_upload_tracepoints;
13768 remote_ops.to_upload_trace_state_variables
13769 = remote_upload_trace_state_variables;
13770 remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data;
13771 remote_ops.to_get_min_fast_tracepoint_insn_len = remote_get_min_fast_tracepoint_insn_len;
13772 remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing;
13773 remote_ops.to_set_circular_trace_buffer = remote_set_circular_trace_buffer;
13774 remote_ops.to_set_trace_buffer_size = remote_set_trace_buffer_size;
13775 remote_ops.to_set_trace_notes = remote_set_trace_notes;
13776 remote_ops.to_core_of_thread = remote_core_of_thread;
13777 remote_ops.to_verify_memory = remote_verify_memory;
13778 remote_ops.to_get_tib_address = remote_get_tib_address;
13779 remote_ops.to_set_permissions = remote_set_permissions;
13780 remote_ops.to_static_tracepoint_marker_at
13781 = remote_static_tracepoint_marker_at;
13782 remote_ops.to_static_tracepoint_markers_by_strid
13783 = remote_static_tracepoint_markers_by_strid;
13784 remote_ops.to_traceframe_info = remote_traceframe_info;
13785 remote_ops.to_use_agent = remote_use_agent;
13786 remote_ops.to_can_use_agent = remote_can_use_agent;
13787 remote_ops.to_supports_btrace = remote_supports_btrace;
13788 remote_ops.to_enable_btrace = remote_enable_btrace;
13789 remote_ops.to_disable_btrace = remote_disable_btrace;
13790 remote_ops.to_teardown_btrace = remote_teardown_btrace;
13791 remote_ops.to_read_btrace = remote_read_btrace;
13792 remote_ops.to_btrace_conf = remote_btrace_conf;
13793 remote_ops.to_augmented_libraries_svr4_read =
13794 remote_augmented_libraries_svr4_read;
13795 remote_ops.to_follow_fork = remote_follow_fork;
13796 remote_ops.to_follow_exec = remote_follow_exec;
13797 remote_ops.to_insert_fork_catchpoint = remote_insert_fork_catchpoint;
13798 remote_ops.to_remove_fork_catchpoint = remote_remove_fork_catchpoint;
13799 remote_ops.to_insert_vfork_catchpoint = remote_insert_vfork_catchpoint;
13800 remote_ops.to_remove_vfork_catchpoint = remote_remove_vfork_catchpoint;
13801 remote_ops.to_insert_exec_catchpoint = remote_insert_exec_catchpoint;
13802 remote_ops.to_remove_exec_catchpoint = remote_remove_exec_catchpoint;
13803 remote_ops.to_execution_direction = remote_execution_direction;
13804 remote_ops.to_thread_handle_to_thread_info =
13805 remote_thread_handle_to_thread_info;
13808 /* Set up the extended remote vector by making a copy of the standard
13809 remote vector and adding to it. */
13812 init_extended_remote_ops (void)
13814 extended_remote_ops = remote_ops;
13816 extended_remote_ops.to_shortname = "extended-remote";
13817 extended_remote_ops.to_longname =
13818 "Extended remote serial target in gdb-specific protocol";
13819 extended_remote_ops.to_doc =
13820 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13821 Specify the serial device it is connected to (e.g. /dev/ttya).";
13822 extended_remote_ops.to_open = extended_remote_open;
13823 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
13824 extended_remote_ops.to_detach = extended_remote_detach;
13825 extended_remote_ops.to_attach = extended_remote_attach;
13826 extended_remote_ops.to_post_attach = extended_remote_post_attach;
13827 extended_remote_ops.to_supports_disable_randomization
13828 = extended_remote_supports_disable_randomization;
13832 remote_can_async_p (struct target_ops *ops)
13834 struct remote_state *rs = get_remote_state ();
13836 /* We don't go async if the user has explicitly prevented it with the
13837 "maint set target-async" command. */
13838 if (!target_async_permitted)
13841 /* We're async whenever the serial device is. */
13842 return serial_can_async_p (rs->remote_desc);
13846 remote_is_async_p (struct target_ops *ops)
13848 struct remote_state *rs = get_remote_state ();
13850 if (!target_async_permitted)
13851 /* We only enable async when the user specifically asks for it. */
13854 /* We're async whenever the serial device is. */
13855 return serial_is_async_p (rs->remote_desc);
13858 /* Pass the SERIAL event on and up to the client. One day this code
13859 will be able to delay notifying the client of an event until the
13860 point where an entire packet has been received. */
13862 static serial_event_ftype remote_async_serial_handler;
13865 remote_async_serial_handler (struct serial *scb, void *context)
13867 /* Don't propogate error information up to the client. Instead let
13868 the client find out about the error by querying the target. */
13869 inferior_event_handler (INF_REG_EVENT, NULL);
13873 remote_async_inferior_event_handler (gdb_client_data data)
13875 inferior_event_handler (INF_REG_EVENT, NULL);
13879 remote_async (struct target_ops *ops, int enable)
13881 struct remote_state *rs = get_remote_state ();
13885 serial_async (rs->remote_desc, remote_async_serial_handler, rs);
13887 /* If there are pending events in the stop reply queue tell the
13888 event loop to process them. */
13889 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
13890 mark_async_event_handler (remote_async_inferior_event_token);
13891 /* For simplicity, below we clear the pending events token
13892 without remembering whether it is marked, so here we always
13893 mark it. If there's actually no pending notification to
13894 process, this ends up being a no-op (other than a spurious
13895 event-loop wakeup). */
13896 if (target_is_non_stop_p ())
13897 mark_async_event_handler (rs->notif_state->get_pending_events_token);
13901 serial_async (rs->remote_desc, NULL, NULL);
13902 /* If the core is disabling async, it doesn't want to be
13903 disturbed with target events. Clear all async event sources
13905 clear_async_event_handler (remote_async_inferior_event_token);
13906 if (target_is_non_stop_p ())
13907 clear_async_event_handler (rs->notif_state->get_pending_events_token);
13911 /* Implementation of the to_thread_events method. */
13914 remote_thread_events (struct target_ops *ops, int enable)
13916 struct remote_state *rs = get_remote_state ();
13917 size_t size = get_remote_packet_size ();
13919 if (packet_support (PACKET_QThreadEvents) == PACKET_DISABLE)
13922 xsnprintf (rs->buf, size, "QThreadEvents:%x", enable ? 1 : 0);
13924 getpkt (&rs->buf, &rs->buf_size, 0);
13926 switch (packet_ok (rs->buf,
13927 &remote_protocol_packets[PACKET_QThreadEvents]))
13930 if (strcmp (rs->buf, "OK") != 0)
13931 error (_("Remote refused setting thread events: %s"), rs->buf);
13934 warning (_("Remote failure reply: %s"), rs->buf);
13936 case PACKET_UNKNOWN:
13942 set_remote_cmd (const char *args, int from_tty)
13944 help_list (remote_set_cmdlist, "set remote ", all_commands, gdb_stdout);
13948 show_remote_cmd (const char *args, int from_tty)
13950 /* We can't just use cmd_show_list here, because we want to skip
13951 the redundant "show remote Z-packet" and the legacy aliases. */
13952 struct cmd_list_element *list = remote_show_cmdlist;
13953 struct ui_out *uiout = current_uiout;
13955 ui_out_emit_tuple tuple_emitter (uiout, "showlist");
13956 for (; list != NULL; list = list->next)
13957 if (strcmp (list->name, "Z-packet") == 0)
13959 else if (list->type == not_set_cmd)
13960 /* Alias commands are exactly like the original, except they
13961 don't have the normal type. */
13965 ui_out_emit_tuple option_emitter (uiout, "option");
13967 uiout->field_string ("name", list->name);
13968 uiout->text (": ");
13969 if (list->type == show_cmd)
13970 do_show_command (NULL, from_tty, list);
13972 cmd_func (list, NULL, from_tty);
13977 /* Function to be called whenever a new objfile (shlib) is detected. */
13979 remote_new_objfile (struct objfile *objfile)
13981 struct remote_state *rs = get_remote_state ();
13983 if (rs->remote_desc != 0) /* Have a remote connection. */
13984 remote_check_symbols ();
13987 /* Pull all the tracepoints defined on the target and create local
13988 data structures representing them. We don't want to create real
13989 tracepoints yet, we don't want to mess up the user's existing
13993 remote_upload_tracepoints (struct target_ops *self, struct uploaded_tp **utpp)
13995 struct remote_state *rs = get_remote_state ();
13998 /* Ask for a first packet of tracepoint definition. */
14000 getpkt (&rs->buf, &rs->buf_size, 0);
14002 while (*p && *p != 'l')
14004 parse_tracepoint_definition (p, utpp);
14005 /* Ask for another packet of tracepoint definition. */
14007 getpkt (&rs->buf, &rs->buf_size, 0);
14014 remote_upload_trace_state_variables (struct target_ops *self,
14015 struct uploaded_tsv **utsvp)
14017 struct remote_state *rs = get_remote_state ();
14020 /* Ask for a first packet of variable definition. */
14022 getpkt (&rs->buf, &rs->buf_size, 0);
14024 while (*p && *p != 'l')
14026 parse_tsv_definition (p, utsvp);
14027 /* Ask for another packet of variable definition. */
14029 getpkt (&rs->buf, &rs->buf_size, 0);
14035 /* The "set/show range-stepping" show hook. */
14038 show_range_stepping (struct ui_file *file, int from_tty,
14039 struct cmd_list_element *c,
14042 fprintf_filtered (file,
14043 _("Debugger's willingness to use range stepping "
14044 "is %s.\n"), value);
14047 /* The "set/show range-stepping" set hook. */
14050 set_range_stepping (char *ignore_args, int from_tty,
14051 struct cmd_list_element *c)
14053 struct remote_state *rs = get_remote_state ();
14055 /* Whene enabling, check whether range stepping is actually
14056 supported by the target, and warn if not. */
14057 if (use_range_stepping)
14059 if (rs->remote_desc != NULL)
14061 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
14062 remote_vcont_probe (rs);
14064 if (packet_support (PACKET_vCont) == PACKET_ENABLE
14065 && rs->supports_vCont.r)
14069 warning (_("Range stepping is not supported by the current target"));
14074 _initialize_remote (void)
14076 struct cmd_list_element *cmd;
14077 const char *cmd_name;
14079 /* architecture specific data */
14080 remote_gdbarch_data_handle =
14081 gdbarch_data_register_post_init (init_remote_state);
14082 remote_g_packet_data_handle =
14083 gdbarch_data_register_pre_init (remote_g_packet_data_init);
14086 = register_program_space_data_with_cleanup (NULL,
14087 remote_pspace_data_cleanup);
14089 /* Initialize the per-target state. At the moment there is only one
14090 of these, not one per target. Only one target is active at a
14092 remote_state = new_remote_state ();
14094 init_remote_ops ();
14095 add_target (&remote_ops);
14097 init_extended_remote_ops ();
14098 add_target (&extended_remote_ops);
14100 /* Hook into new objfile notification. */
14101 observer_attach_new_objfile (remote_new_objfile);
14102 /* We're no longer interested in notification events of an inferior
14104 observer_attach_inferior_exit (discard_pending_stop_replies);
14107 init_remote_threadtests ();
14110 stop_reply_queue = QUEUE_alloc (stop_reply_p, stop_reply_xfree);
14111 /* set/show remote ... */
14113 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
14114 Remote protocol specific variables\n\
14115 Configure various remote-protocol specific variables such as\n\
14116 the packets being used"),
14117 &remote_set_cmdlist, "set remote ",
14118 0 /* allow-unknown */, &setlist);
14119 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
14120 Remote protocol specific variables\n\
14121 Configure various remote-protocol specific variables such as\n\
14122 the packets being used"),
14123 &remote_show_cmdlist, "show remote ",
14124 0 /* allow-unknown */, &showlist);
14126 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
14127 Compare section data on target to the exec file.\n\
14128 Argument is a single section name (default: all loaded sections).\n\
14129 To compare only read-only loaded sections, specify the -r option."),
14132 add_cmd ("packet", class_maintenance, packet_command, _("\
14133 Send an arbitrary packet to a remote target.\n\
14134 maintenance packet TEXT\n\
14135 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14136 this command sends the string TEXT to the inferior, and displays the\n\
14137 response packet. GDB supplies the initial `$' character, and the\n\
14138 terminating `#' character and checksum."),
14141 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
14142 Set whether to send break if interrupted."), _("\
14143 Show whether to send break if interrupted."), _("\
14144 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14145 set_remotebreak, show_remotebreak,
14146 &setlist, &showlist);
14147 cmd_name = "remotebreak";
14148 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
14149 deprecate_cmd (cmd, "set remote interrupt-sequence");
14150 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
14151 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
14152 deprecate_cmd (cmd, "show remote interrupt-sequence");
14154 add_setshow_enum_cmd ("interrupt-sequence", class_support,
14155 interrupt_sequence_modes, &interrupt_sequence_mode,
14157 Set interrupt sequence to remote target."), _("\
14158 Show interrupt sequence to remote target."), _("\
14159 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14160 NULL, show_interrupt_sequence,
14161 &remote_set_cmdlist,
14162 &remote_show_cmdlist);
14164 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
14165 &interrupt_on_connect, _("\
14166 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14167 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14168 If set, interrupt sequence is sent to remote target."),
14170 &remote_set_cmdlist, &remote_show_cmdlist);
14172 /* Install commands for configuring memory read/write packets. */
14174 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
14175 Set the maximum number of bytes per memory write packet (deprecated)."),
14177 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
14178 Show the maximum number of bytes per memory write packet (deprecated)."),
14180 add_cmd ("memory-write-packet-size", no_class,
14181 set_memory_write_packet_size, _("\
14182 Set the maximum number of bytes per memory-write packet.\n\
14183 Specify the number of bytes in a packet or 0 (zero) for the\n\
14184 default packet size. The actual limit is further reduced\n\
14185 dependent on the target. Specify ``fixed'' to disable the\n\
14186 further restriction and ``limit'' to enable that restriction."),
14187 &remote_set_cmdlist);
14188 add_cmd ("memory-read-packet-size", no_class,
14189 set_memory_read_packet_size, _("\
14190 Set the maximum number of bytes per memory-read packet.\n\
14191 Specify the number of bytes in a packet or 0 (zero) for the\n\
14192 default packet size. The actual limit is further reduced\n\
14193 dependent on the target. Specify ``fixed'' to disable the\n\
14194 further restriction and ``limit'' to enable that restriction."),
14195 &remote_set_cmdlist);
14196 add_cmd ("memory-write-packet-size", no_class,
14197 show_memory_write_packet_size,
14198 _("Show the maximum number of bytes per memory-write packet."),
14199 &remote_show_cmdlist);
14200 add_cmd ("memory-read-packet-size", no_class,
14201 show_memory_read_packet_size,
14202 _("Show the maximum number of bytes per memory-read packet."),
14203 &remote_show_cmdlist);
14205 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
14206 &remote_hw_watchpoint_limit, _("\
14207 Set the maximum number of target hardware watchpoints."), _("\
14208 Show the maximum number of target hardware watchpoints."), _("\
14209 Specify a negative limit for unlimited."),
14210 NULL, NULL, /* FIXME: i18n: The maximum
14211 number of target hardware
14212 watchpoints is %s. */
14213 &remote_set_cmdlist, &remote_show_cmdlist);
14214 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class,
14215 &remote_hw_watchpoint_length_limit, _("\
14216 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14217 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14218 Specify a negative limit for unlimited."),
14219 NULL, NULL, /* FIXME: i18n: The maximum
14220 length (in bytes) of a target
14221 hardware watchpoint is %s. */
14222 &remote_set_cmdlist, &remote_show_cmdlist);
14223 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
14224 &remote_hw_breakpoint_limit, _("\
14225 Set the maximum number of target hardware breakpoints."), _("\
14226 Show the maximum number of target hardware breakpoints."), _("\
14227 Specify a negative limit for unlimited."),
14228 NULL, NULL, /* FIXME: i18n: The maximum
14229 number of target hardware
14230 breakpoints is %s. */
14231 &remote_set_cmdlist, &remote_show_cmdlist);
14233 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure,
14234 &remote_address_size, _("\
14235 Set the maximum size of the address (in bits) in a memory packet."), _("\
14236 Show the maximum size of the address (in bits) in a memory packet."), NULL,
14238 NULL, /* FIXME: i18n: */
14239 &setlist, &showlist);
14241 init_all_packet_configs ();
14243 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
14244 "X", "binary-download", 1);
14246 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
14247 "vCont", "verbose-resume", 0);
14249 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
14250 "QPassSignals", "pass-signals", 0);
14252 add_packet_config_cmd (&remote_protocol_packets[PACKET_QCatchSyscalls],
14253 "QCatchSyscalls", "catch-syscalls", 0);
14255 add_packet_config_cmd (&remote_protocol_packets[PACKET_QProgramSignals],
14256 "QProgramSignals", "program-signals", 0);
14258 add_packet_config_cmd (&remote_protocol_packets[PACKET_QSetWorkingDir],
14259 "QSetWorkingDir", "set-working-dir", 0);
14261 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartupWithShell],
14262 "QStartupWithShell", "startup-with-shell", 0);
14264 add_packet_config_cmd (&remote_protocol_packets
14265 [PACKET_QEnvironmentHexEncoded],
14266 "QEnvironmentHexEncoded", "environment-hex-encoded",
14269 add_packet_config_cmd (&remote_protocol_packets[PACKET_QEnvironmentReset],
14270 "QEnvironmentReset", "environment-reset",
14273 add_packet_config_cmd (&remote_protocol_packets[PACKET_QEnvironmentUnset],
14274 "QEnvironmentUnset", "environment-unset",
14277 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
14278 "qSymbol", "symbol-lookup", 0);
14280 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
14281 "P", "set-register", 1);
14283 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
14284 "p", "fetch-register", 1);
14286 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
14287 "Z0", "software-breakpoint", 0);
14289 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
14290 "Z1", "hardware-breakpoint", 0);
14292 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
14293 "Z2", "write-watchpoint", 0);
14295 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
14296 "Z3", "read-watchpoint", 0);
14298 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
14299 "Z4", "access-watchpoint", 0);
14301 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
14302 "qXfer:auxv:read", "read-aux-vector", 0);
14304 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_exec_file],
14305 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14307 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
14308 "qXfer:features:read", "target-features", 0);
14310 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
14311 "qXfer:libraries:read", "library-info", 0);
14313 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4],
14314 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14316 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
14317 "qXfer:memory-map:read", "memory-map", 0);
14319 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
14320 "qXfer:spu:read", "read-spu-object", 0);
14322 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
14323 "qXfer:spu:write", "write-spu-object", 0);
14325 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
14326 "qXfer:osdata:read", "osdata", 0);
14328 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
14329 "qXfer:threads:read", "threads", 0);
14331 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
14332 "qXfer:siginfo:read", "read-siginfo-object", 0);
14334 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
14335 "qXfer:siginfo:write", "write-siginfo-object", 0);
14337 add_packet_config_cmd
14338 (&remote_protocol_packets[PACKET_qXfer_traceframe_info],
14339 "qXfer:traceframe-info:read", "traceframe-info", 0);
14341 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_uib],
14342 "qXfer:uib:read", "unwind-info-block", 0);
14344 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
14345 "qGetTLSAddr", "get-thread-local-storage-address",
14348 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr],
14349 "qGetTIBAddr", "get-thread-information-block-address",
14352 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
14353 "bc", "reverse-continue", 0);
14355 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
14356 "bs", "reverse-step", 0);
14358 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
14359 "qSupported", "supported-packets", 0);
14361 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
14362 "qSearch:memory", "search-memory", 0);
14364 add_packet_config_cmd (&remote_protocol_packets[PACKET_qTStatus],
14365 "qTStatus", "trace-status", 0);
14367 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_setfs],
14368 "vFile:setfs", "hostio-setfs", 0);
14370 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
14371 "vFile:open", "hostio-open", 0);
14373 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
14374 "vFile:pread", "hostio-pread", 0);
14376 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
14377 "vFile:pwrite", "hostio-pwrite", 0);
14379 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
14380 "vFile:close", "hostio-close", 0);
14382 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
14383 "vFile:unlink", "hostio-unlink", 0);
14385 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink],
14386 "vFile:readlink", "hostio-readlink", 0);
14388 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_fstat],
14389 "vFile:fstat", "hostio-fstat", 0);
14391 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
14392 "vAttach", "attach", 0);
14394 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
14397 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
14398 "QStartNoAckMode", "noack", 0);
14400 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
14401 "vKill", "kill", 0);
14403 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
14404 "qAttached", "query-attached", 0);
14406 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
14407 "ConditionalTracepoints",
14408 "conditional-tracepoints", 0);
14410 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints],
14411 "ConditionalBreakpoints",
14412 "conditional-breakpoints", 0);
14414 add_packet_config_cmd (&remote_protocol_packets[PACKET_BreakpointCommands],
14415 "BreakpointCommands",
14416 "breakpoint-commands", 0);
14418 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
14419 "FastTracepoints", "fast-tracepoints", 0);
14421 add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource],
14422 "TracepointSource", "TracepointSource", 0);
14424 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow],
14425 "QAllow", "allow", 0);
14427 add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints],
14428 "StaticTracepoints", "static-tracepoints", 0);
14430 add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace],
14431 "InstallInTrace", "install-in-trace", 0);
14433 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read],
14434 "qXfer:statictrace:read", "read-sdata-object", 0);
14436 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic],
14437 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14439 add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization],
14440 "QDisableRandomization", "disable-randomization", 0);
14442 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAgent],
14443 "QAgent", "agent", 0);
14445 add_packet_config_cmd (&remote_protocol_packets[PACKET_QTBuffer_size],
14446 "QTBuffer:size", "trace-buffer-size", 0);
14448 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_off],
14449 "Qbtrace:off", "disable-btrace", 0);
14451 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts],
14452 "Qbtrace:bts", "enable-btrace-bts", 0);
14454 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_pt],
14455 "Qbtrace:pt", "enable-btrace-pt", 0);
14457 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace],
14458 "qXfer:btrace", "read-btrace", 0);
14460 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace_conf],
14461 "qXfer:btrace-conf", "read-btrace-conf", 0);
14463 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_bts_size],
14464 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14466 add_packet_config_cmd (&remote_protocol_packets[PACKET_multiprocess_feature],
14467 "multiprocess-feature", "multiprocess-feature", 0);
14469 add_packet_config_cmd (&remote_protocol_packets[PACKET_swbreak_feature],
14470 "swbreak-feature", "swbreak-feature", 0);
14472 add_packet_config_cmd (&remote_protocol_packets[PACKET_hwbreak_feature],
14473 "hwbreak-feature", "hwbreak-feature", 0);
14475 add_packet_config_cmd (&remote_protocol_packets[PACKET_fork_event_feature],
14476 "fork-event-feature", "fork-event-feature", 0);
14478 add_packet_config_cmd (&remote_protocol_packets[PACKET_vfork_event_feature],
14479 "vfork-event-feature", "vfork-event-feature", 0);
14481 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_pt_size],
14482 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14484 add_packet_config_cmd (&remote_protocol_packets[PACKET_vContSupported],
14485 "vContSupported", "verbose-resume-supported", 0);
14487 add_packet_config_cmd (&remote_protocol_packets[PACKET_exec_event_feature],
14488 "exec-event-feature", "exec-event-feature", 0);
14490 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCtrlC],
14491 "vCtrlC", "ctrl-c", 0);
14493 add_packet_config_cmd (&remote_protocol_packets[PACKET_QThreadEvents],
14494 "QThreadEvents", "thread-events", 0);
14496 add_packet_config_cmd (&remote_protocol_packets[PACKET_no_resumed],
14497 "N stop reply", "no-resumed-stop-reply", 0);
14499 /* Assert that we've registered "set remote foo-packet" commands
14500 for all packet configs. */
14504 for (i = 0; i < PACKET_MAX; i++)
14506 /* Ideally all configs would have a command associated. Some
14507 still don't though. */
14512 case PACKET_QNonStop:
14513 case PACKET_EnableDisableTracepoints_feature:
14514 case PACKET_tracenz_feature:
14515 case PACKET_DisconnectedTracing_feature:
14516 case PACKET_augmented_libraries_svr4_read_feature:
14518 /* Additions to this list need to be well justified:
14519 pre-existing packets are OK; new packets are not. */
14527 /* This catches both forgetting to add a config command, and
14528 forgetting to remove a packet from the exception list. */
14529 gdb_assert (excepted == (remote_protocol_packets[i].name == NULL));
14533 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14534 Z sub-packet has its own set and show commands, but users may
14535 have sets to this variable in their .gdbinit files (or in their
14537 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
14538 &remote_Z_packet_detect, _("\
14539 Set use of remote protocol `Z' packets"), _("\
14540 Show use of remote protocol `Z' packets "), _("\
14541 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14543 set_remote_protocol_Z_packet_cmd,
14544 show_remote_protocol_Z_packet_cmd,
14545 /* FIXME: i18n: Use of remote protocol
14546 `Z' packets is %s. */
14547 &remote_set_cmdlist, &remote_show_cmdlist);
14549 add_prefix_cmd ("remote", class_files, remote_command, _("\
14550 Manipulate files on the remote system\n\
14551 Transfer files to and from the remote target system."),
14552 &remote_cmdlist, "remote ",
14553 0 /* allow-unknown */, &cmdlist);
14555 add_cmd ("put", class_files, remote_put_command,
14556 _("Copy a local file to the remote system."),
14559 add_cmd ("get", class_files, remote_get_command,
14560 _("Copy a remote file to the local system."),
14563 add_cmd ("delete", class_files, remote_delete_command,
14564 _("Delete a remote file."),
14567 add_setshow_string_noescape_cmd ("exec-file", class_files,
14568 &remote_exec_file_var, _("\
14569 Set the remote pathname for \"run\""), _("\
14570 Show the remote pathname for \"run\""), NULL,
14571 set_remote_exec_file,
14572 show_remote_exec_file,
14573 &remote_set_cmdlist,
14574 &remote_show_cmdlist);
14576 add_setshow_boolean_cmd ("range-stepping", class_run,
14577 &use_range_stepping, _("\
14578 Enable or disable range stepping."), _("\
14579 Show whether target-assisted range stepping is enabled."), _("\
14580 If on, and the target supports it, when stepping a source line, GDB\n\
14581 tells the target to step the corresponding range of addresses itself instead\n\
14582 of issuing multiple single-steps. This speeds up source level\n\
14583 stepping. If off, GDB always issues single-steps, even if range\n\
14584 stepping is supported by the target. The default is on."),
14585 set_range_stepping,
14586 show_range_stepping,
14590 /* Eventually initialize fileio. See fileio.c */
14591 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
14593 /* Take advantage of the fact that the TID field is not used, to tag
14594 special ptids with it set to != 0. */
14595 magic_null_ptid = ptid_build (42000, -1, 1);
14596 not_sent_ptid = ptid_build (42000, -2, 1);
14597 any_thread_ptid = ptid_build (42000, 0, 1);