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"
76 /* Temp hacks for tracepoint encoding migration. */
77 static char *target_buf;
78 static long target_buf_size;
80 /* Per-program-space data key. */
81 static const struct program_space_data *remote_pspace_data;
83 /* The variable registered as the control variable used by the
84 remote exec-file commands. While the remote exec-file setting is
85 per-program-space, the set/show machinery uses this as the
86 location of the remote exec-file value. */
87 static char *remote_exec_file_var;
89 /* The size to align memory write packets, when practical. The protocol
90 does not guarantee any alignment, and gdb will generate short
91 writes and unaligned writes, but even as a best-effort attempt this
92 can improve bulk transfers. For instance, if a write is misaligned
93 relative to the target's data bus, the stub may need to make an extra
94 round trip fetching data from the target. This doesn't make a
95 huge difference, but it's easy to do, so we try to be helpful.
97 The alignment chosen is arbitrary; usually data bus width is
98 important here, not the possibly larger cache line size. */
99 enum { REMOTE_ALIGN_WRITES = 16 };
101 /* Prototypes for local functions. */
102 static int getpkt_sane (char **buf, long *sizeof_buf, int forever);
103 static int getpkt_or_notif_sane (char **buf, long *sizeof_buf,
104 int forever, int *is_notif);
106 static void remote_files_info (struct target_ops *ignore);
108 static void remote_prepare_to_store (struct target_ops *self,
109 struct regcache *regcache);
111 static void remote_open_1 (const char *, int, struct target_ops *,
114 static void remote_close (struct target_ops *self);
118 static int remote_vkill (int pid, struct remote_state *rs);
120 static void remote_kill_k (void);
122 static void remote_mourn (struct target_ops *ops);
124 static void extended_remote_restart (void);
126 static void remote_send (char **buf, long *sizeof_buf_p);
128 static int readchar (int timeout);
130 static void remote_serial_write (const char *str, int len);
132 static void remote_kill (struct target_ops *ops);
134 static int remote_can_async_p (struct target_ops *);
136 static int remote_is_async_p (struct target_ops *);
138 static void remote_async (struct target_ops *ops, int enable);
140 static void remote_thread_events (struct target_ops *ops, int enable);
142 static void interrupt_query (void);
144 static void set_general_thread (ptid_t ptid);
145 static void set_continue_thread (ptid_t ptid);
147 static void get_offsets (void);
149 static void skip_frame (void);
151 static long read_frame (char **buf_p, long *sizeof_buf);
153 static int hexnumlen (ULONGEST num);
155 static void init_remote_ops (void);
157 static void init_extended_remote_ops (void);
159 static void remote_stop (struct target_ops *self, ptid_t);
161 static int stubhex (int ch);
163 static int hexnumstr (char *, ULONGEST);
165 static int hexnumnstr (char *, ULONGEST, int);
167 static CORE_ADDR remote_address_masked (CORE_ADDR);
169 static void print_packet (const char *);
171 static void compare_sections_command (char *, int);
173 static void packet_command (char *, int);
175 static int stub_unpack_int (char *buff, int fieldlength);
177 static ptid_t remote_current_thread (ptid_t oldptid);
179 static int putpkt_binary (const char *buf, int cnt);
181 static void check_binary_download (CORE_ADDR addr);
183 struct packet_config;
185 static void show_packet_config_cmd (struct packet_config *config);
187 static void show_remote_protocol_packet_cmd (struct ui_file *file,
189 struct cmd_list_element *c,
192 static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid);
193 static ptid_t read_ptid (char *buf, char **obuf);
195 static void remote_set_permissions (struct target_ops *self);
197 static int remote_get_trace_status (struct target_ops *self,
198 struct trace_status *ts);
200 static int remote_upload_tracepoints (struct target_ops *self,
201 struct uploaded_tp **utpp);
203 static int remote_upload_trace_state_variables (struct target_ops *self,
204 struct uploaded_tsv **utsvp);
206 static void remote_query_supported (void);
208 static void remote_check_symbols (void);
210 void _initialize_remote (void);
213 static void stop_reply_xfree (struct stop_reply *);
214 static void remote_parse_stop_reply (char *, struct stop_reply *);
215 static void push_stop_reply (struct stop_reply *);
216 static void discard_pending_stop_replies_in_queue (struct remote_state *);
217 static int peek_stop_reply (ptid_t ptid);
219 struct threads_listing_context;
220 static void remove_new_fork_children (struct threads_listing_context *);
222 static void remote_async_inferior_event_handler (gdb_client_data);
224 static void remote_terminal_ours (struct target_ops *self);
226 static int remote_read_description_p (struct target_ops *target);
228 static void remote_console_output (char *msg);
230 static int remote_supports_cond_breakpoints (struct target_ops *self);
232 static int remote_can_run_breakpoint_commands (struct target_ops *self);
234 static void remote_btrace_reset (void);
236 static void remote_btrace_maybe_reopen (void);
238 static int stop_reply_queue_length (void);
240 static void readahead_cache_invalidate (void);
242 static void remote_unpush_and_throw (void);
246 static struct cmd_list_element *remote_cmdlist;
248 /* For "set remote" and "show remote". */
250 static struct cmd_list_element *remote_set_cmdlist;
251 static struct cmd_list_element *remote_show_cmdlist;
253 /* Stub vCont actions support.
255 Each field is a boolean flag indicating whether the stub reports
256 support for the corresponding action. */
258 struct vCont_action_support
273 /* Controls whether GDB is willing to use range stepping. */
275 static int use_range_stepping = 1;
277 #define OPAQUETHREADBYTES 8
279 /* a 64 bit opaque identifier */
280 typedef unsigned char threadref[OPAQUETHREADBYTES];
282 /* About this many threadisds fit in a packet. */
284 #define MAXTHREADLISTRESULTS 32
286 /* The max number of chars in debug output. The rest of chars are
289 #define REMOTE_DEBUG_MAX_CHAR 512
291 /* Data for the vFile:pread readahead cache. */
293 struct readahead_cache
295 /* The file descriptor for the file that is being cached. -1 if the
299 /* The offset into the file that the cache buffer corresponds
303 /* The buffer holding the cache contents. */
305 /* The buffer's size. We try to read as much as fits into a packet
309 /* Cache hit and miss counters. */
314 /* Description of the remote protocol state for the currently
315 connected target. This is per-target state, and independent of the
316 selected architecture. */
320 /* A buffer to use for incoming packets, and its current size. The
321 buffer is grown dynamically for larger incoming packets.
322 Outgoing packets may also be constructed in this buffer.
323 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
324 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
329 /* True if we're going through initial connection setup (finding out
330 about the remote side's threads, relocating symbols, etc.). */
333 /* If we negotiated packet size explicitly (and thus can bypass
334 heuristics for the largest packet size that will not overflow
335 a buffer in the stub), this will be set to that packet size.
336 Otherwise zero, meaning to use the guessed size. */
337 long explicit_packet_size;
339 /* remote_wait is normally called when the target is running and
340 waits for a stop reply packet. But sometimes we need to call it
341 when the target is already stopped. We can send a "?" packet
342 and have remote_wait read the response. Or, if we already have
343 the response, we can stash it in BUF and tell remote_wait to
344 skip calling getpkt. This flag is set when BUF contains a
345 stop reply packet and the target is not waiting. */
346 int cached_wait_status;
348 /* True, if in no ack mode. That is, neither GDB nor the stub will
349 expect acks from each other. The connection is assumed to be
353 /* True if we're connected in extended remote mode. */
356 /* True if we resumed the target and we're waiting for the target to
357 stop. In the mean time, we can't start another command/query.
358 The remote server wouldn't be ready to process it, so we'd
359 timeout waiting for a reply that would never come and eventually
360 we'd close the connection. This can happen in asynchronous mode
361 because we allow GDB commands while the target is running. */
362 int waiting_for_stop_reply;
364 /* The status of the stub support for the various vCont actions. */
365 struct vCont_action_support supports_vCont;
367 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
368 responded to that. */
371 /* True if we saw a Ctrl-C while reading or writing from/to the
372 remote descriptor. At that point it is not safe to send a remote
373 interrupt packet, so we instead remember we saw the Ctrl-C and
374 process it once we're done with sending/receiving the current
375 packet, which should be shortly. If however that takes too long,
376 and the user presses Ctrl-C again, we offer to disconnect. */
377 int got_ctrlc_during_io;
379 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
380 remote_open knows that we don't have a file open when the program
382 struct serial *remote_desc;
384 /* These are the threads which we last sent to the remote system. The
385 TID member will be -1 for all or -2 for not sent yet. */
386 ptid_t general_thread;
387 ptid_t continue_thread;
389 /* This is the traceframe which we last selected on the remote system.
390 It will be -1 if no traceframe is selected. */
391 int remote_traceframe_number;
393 char *last_pass_packet;
395 /* The last QProgramSignals packet sent to the target. We bypass
396 sending a new program signals list down to the target if the new
397 packet is exactly the same as the last we sent. IOW, we only let
398 the target know about program signals list changes. */
399 char *last_program_signals_packet;
401 enum gdb_signal last_sent_signal;
405 /* The execution direction of the last resume we got. */
406 enum exec_direction_kind last_resume_exec_dir;
408 char *finished_object;
409 char *finished_annex;
410 ULONGEST finished_offset;
412 /* Should we try the 'ThreadInfo' query packet?
414 This variable (NOT available to the user: auto-detect only!)
415 determines whether GDB will use the new, simpler "ThreadInfo"
416 query or the older, more complex syntax for thread queries.
417 This is an auto-detect variable (set to true at each connect,
418 and set to false when the target fails to recognize it). */
419 int use_threadinfo_query;
420 int use_threadextra_query;
422 threadref echo_nextthread;
423 threadref nextthread;
424 threadref resultthreadlist[MAXTHREADLISTRESULTS];
426 /* The state of remote notification. */
427 struct remote_notif_state *notif_state;
429 /* The branch trace configuration. */
430 struct btrace_config btrace_config;
432 /* The argument to the last "vFile:setfs:" packet we sent, used
433 to avoid sending repeated unnecessary "vFile:setfs:" packets.
434 Initialized to -1 to indicate that no "vFile:setfs:" packet
435 has yet been sent. */
438 /* A readahead cache for vFile:pread. Often, reading a binary
439 involves a sequence of small reads. E.g., when parsing an ELF
440 file. A readahead cache helps mostly the case of remote
441 debugging on a connection with higher latency, due to the
442 request/reply nature of the RSP. We only cache data for a single
443 file descriptor at a time. */
444 struct readahead_cache readahead_cache;
447 /* Private data that we'll store in (struct thread_info)->private. */
448 struct private_thread_info
454 /* Whether the target stopped for a breakpoint/watchpoint. */
455 enum target_stop_reason stop_reason;
457 /* This is set to the data address of the access causing the target
458 to stop for a watchpoint. */
459 CORE_ADDR watch_data_address;
461 /* Fields used by the vCont action coalescing implemented in
462 remote_resume / remote_commit_resume. remote_resume stores each
463 thread's last resume request in these fields, so that a later
464 remote_commit_resume knows which is the proper action for this
465 thread to include in the vCont packet. */
467 /* True if the last target_resume call for this thread was a step
468 request, false if a continue request. */
469 int last_resume_step;
471 /* The signal specified in the last target_resume call for this
473 enum gdb_signal last_resume_sig;
475 /* Whether this thread was already vCont-resumed on the remote
481 free_private_thread_info (struct private_thread_info *info)
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. */
577 remote_get_noisy_reply (char **buf_p,
580 do /* Loop on reply from remote stub. */
584 QUIT; /* Allow user to bail out with ^C. */
585 getpkt (buf_p, sizeof_buf, 0);
589 else if (startswith (buf, "qRelocInsn:"))
592 CORE_ADDR from, to, org_to;
594 int adjusted_size = 0;
597 p = buf + strlen ("qRelocInsn:");
598 pp = unpack_varlen_hex (p, &ul);
600 error (_("invalid qRelocInsn packet: %s"), buf);
604 unpack_varlen_hex (p, &ul);
611 gdbarch_relocate_instruction (target_gdbarch (), &to, from);
614 CATCH (ex, RETURN_MASK_ALL)
616 if (ex.error == MEMORY_ERROR)
618 /* Propagate memory errors silently back to the
619 target. The stub may have limited the range of
620 addresses we can write to, for example. */
624 /* Something unexpectedly bad happened. Be verbose
625 so we can tell what, and propagate the error back
626 to the stub, so it doesn't get stuck waiting for
628 exception_fprintf (gdb_stderr, ex,
629 _("warning: relocating instruction: "));
637 adjusted_size = to - org_to;
639 xsnprintf (buf, *sizeof_buf, "qRelocInsn:%x", adjusted_size);
643 else if (buf[0] == 'O' && buf[1] != 'K')
644 remote_console_output (buf + 1); /* 'O' message from stub */
646 return buf; /* Here's the actual reply. */
651 /* Handle for retreving the remote protocol data from gdbarch. */
652 static struct gdbarch_data *remote_gdbarch_data_handle;
654 static struct remote_arch_state *
655 get_remote_arch_state (void)
657 gdb_assert (target_gdbarch () != NULL);
658 return ((struct remote_arch_state *)
659 gdbarch_data (target_gdbarch (), remote_gdbarch_data_handle));
662 /* Fetch the global remote target state. */
664 static struct remote_state *
665 get_remote_state (void)
667 /* Make sure that the remote architecture state has been
668 initialized, because doing so might reallocate rs->buf. Any
669 function which calls getpkt also needs to be mindful of changes
670 to rs->buf, but this call limits the number of places which run
672 get_remote_arch_state ();
674 return get_remote_state_raw ();
677 /* Cleanup routine for the remote module's pspace data. */
680 remote_pspace_data_cleanup (struct program_space *pspace, void *arg)
682 char *remote_exec_file = (char *) arg;
684 xfree (remote_exec_file);
687 /* Fetch the remote exec-file from the current program space. */
690 get_remote_exec_file (void)
692 char *remote_exec_file;
695 = (char *) program_space_data (current_program_space,
697 if (remote_exec_file == NULL)
700 return remote_exec_file;
703 /* Set the remote exec file for PSPACE. */
706 set_pspace_remote_exec_file (struct program_space *pspace,
707 char *remote_exec_file)
709 char *old_file = (char *) program_space_data (pspace, remote_pspace_data);
712 set_program_space_data (pspace, remote_pspace_data,
713 xstrdup (remote_exec_file));
716 /* The "set/show remote exec-file" set command hook. */
719 set_remote_exec_file (char *ignored, int from_tty,
720 struct cmd_list_element *c)
722 gdb_assert (remote_exec_file_var != NULL);
723 set_pspace_remote_exec_file (current_program_space, remote_exec_file_var);
726 /* The "set/show remote exec-file" show command hook. */
729 show_remote_exec_file (struct ui_file *file, int from_tty,
730 struct cmd_list_element *cmd, const char *value)
732 fprintf_filtered (file, "%s\n", remote_exec_file_var);
736 compare_pnums (const void *lhs_, const void *rhs_)
738 const struct packet_reg * const *lhs
739 = (const struct packet_reg * const *) lhs_;
740 const struct packet_reg * const *rhs
741 = (const struct packet_reg * const *) rhs_;
743 if ((*lhs)->pnum < (*rhs)->pnum)
745 else if ((*lhs)->pnum == (*rhs)->pnum)
752 map_regcache_remote_table (struct gdbarch *gdbarch, struct packet_reg *regs)
754 int regnum, num_remote_regs, offset;
755 struct packet_reg **remote_regs;
757 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
759 struct packet_reg *r = ®s[regnum];
761 if (register_size (gdbarch, regnum) == 0)
762 /* Do not try to fetch zero-sized (placeholder) registers. */
765 r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
770 /* Define the g/G packet format as the contents of each register
771 with a remote protocol number, in order of ascending protocol
774 remote_regs = XALLOCAVEC (struct packet_reg *, gdbarch_num_regs (gdbarch));
775 for (num_remote_regs = 0, regnum = 0;
776 regnum < gdbarch_num_regs (gdbarch);
778 if (regs[regnum].pnum != -1)
779 remote_regs[num_remote_regs++] = ®s[regnum];
781 qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
784 for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
786 remote_regs[regnum]->in_g_packet = 1;
787 remote_regs[regnum]->offset = offset;
788 offset += register_size (gdbarch, remote_regs[regnum]->regnum);
794 /* Given the architecture described by GDBARCH, return the remote
795 protocol register's number and the register's offset in the g/G
796 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
797 If the target does not have a mapping for REGNUM, return false,
798 otherwise, return true. */
801 remote_register_number_and_offset (struct gdbarch *gdbarch, int regnum,
802 int *pnum, int *poffset)
804 struct packet_reg *regs;
805 struct cleanup *old_chain;
807 gdb_assert (regnum < gdbarch_num_regs (gdbarch));
809 regs = XCNEWVEC (struct packet_reg, gdbarch_num_regs (gdbarch));
810 old_chain = make_cleanup (xfree, regs);
812 map_regcache_remote_table (gdbarch, regs);
814 *pnum = regs[regnum].pnum;
815 *poffset = regs[regnum].offset;
817 do_cleanups (old_chain);
823 init_remote_state (struct gdbarch *gdbarch)
825 struct remote_state *rs = get_remote_state_raw ();
826 struct remote_arch_state *rsa;
828 rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state);
830 /* Use the architecture to build a regnum<->pnum table, which will be
831 1:1 unless a feature set specifies otherwise. */
832 rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch,
833 gdbarch_num_regs (gdbarch),
836 /* Record the maximum possible size of the g packet - it may turn out
838 rsa->sizeof_g_packet = map_regcache_remote_table (gdbarch, rsa->regs);
840 /* Default maximum number of characters in a packet body. Many
841 remote stubs have a hardwired buffer size of 400 bytes
842 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
843 as the maximum packet-size to ensure that the packet and an extra
844 NUL character can always fit in the buffer. This stops GDB
845 trashing stubs that try to squeeze an extra NUL into what is
846 already a full buffer (As of 1999-12-04 that was most stubs). */
847 rsa->remote_packet_size = 400 - 1;
849 /* This one is filled in when a ``g'' packet is received. */
850 rsa->actual_register_packet_size = 0;
852 /* Should rsa->sizeof_g_packet needs more space than the
853 default, adjust the size accordingly. Remember that each byte is
854 encoded as two characters. 32 is the overhead for the packet
855 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
856 (``$NN:G...#NN'') is a better guess, the below has been padded a
858 if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2))
859 rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32);
861 /* Make sure that the packet buffer is plenty big enough for
862 this architecture. */
863 if (rs->buf_size < rsa->remote_packet_size)
865 rs->buf_size = 2 * rsa->remote_packet_size;
866 rs->buf = (char *) xrealloc (rs->buf, rs->buf_size);
872 /* Return the current allowed size of a remote packet. This is
873 inferred from the current architecture, and should be used to
874 limit the length of outgoing packets. */
876 get_remote_packet_size (void)
878 struct remote_state *rs = get_remote_state ();
879 struct remote_arch_state *rsa = get_remote_arch_state ();
881 if (rs->explicit_packet_size)
882 return rs->explicit_packet_size;
884 return rsa->remote_packet_size;
887 static struct packet_reg *
888 packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
890 if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch ()))
894 struct packet_reg *r = &rsa->regs[regnum];
896 gdb_assert (r->regnum == regnum);
901 static struct packet_reg *
902 packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
906 for (i = 0; i < gdbarch_num_regs (target_gdbarch ()); i++)
908 struct packet_reg *r = &rsa->regs[i];
916 static struct target_ops remote_ops;
918 static struct target_ops extended_remote_ops;
920 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
921 ``forever'' still use the normal timeout mechanism. This is
922 currently used by the ASYNC code to guarentee that target reads
923 during the initial connect always time-out. Once getpkt has been
924 modified to return a timeout indication and, in turn
925 remote_wait()/wait_for_inferior() have gained a timeout parameter
927 static int wait_forever_enabled_p = 1;
929 /* Allow the user to specify what sequence to send to the remote
930 when he requests a program interruption: Although ^C is usually
931 what remote systems expect (this is the default, here), it is
932 sometimes preferable to send a break. On other systems such
933 as the Linux kernel, a break followed by g, which is Magic SysRq g
934 is required in order to interrupt the execution. */
935 const char interrupt_sequence_control_c[] = "Ctrl-C";
936 const char interrupt_sequence_break[] = "BREAK";
937 const char interrupt_sequence_break_g[] = "BREAK-g";
938 static const char *const interrupt_sequence_modes[] =
940 interrupt_sequence_control_c,
941 interrupt_sequence_break,
942 interrupt_sequence_break_g,
945 static const char *interrupt_sequence_mode = interrupt_sequence_control_c;
948 show_interrupt_sequence (struct ui_file *file, int from_tty,
949 struct cmd_list_element *c,
952 if (interrupt_sequence_mode == interrupt_sequence_control_c)
953 fprintf_filtered (file,
954 _("Send the ASCII ETX character (Ctrl-c) "
955 "to the remote target to interrupt the "
956 "execution of the program.\n"));
957 else if (interrupt_sequence_mode == interrupt_sequence_break)
958 fprintf_filtered (file,
959 _("send a break signal to the remote target "
960 "to interrupt the execution of the program.\n"));
961 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
962 fprintf_filtered (file,
963 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
964 "the remote target to interrupt the execution "
965 "of Linux kernel.\n"));
967 internal_error (__FILE__, __LINE__,
968 _("Invalid value for interrupt_sequence_mode: %s."),
969 interrupt_sequence_mode);
972 /* This boolean variable specifies whether interrupt_sequence is sent
973 to the remote target when gdb connects to it.
974 This is mostly needed when you debug the Linux kernel: The Linux kernel
975 expects BREAK g which is Magic SysRq g for connecting gdb. */
976 static int interrupt_on_connect = 0;
978 /* This variable is used to implement the "set/show remotebreak" commands.
979 Since these commands are now deprecated in favor of "set/show remote
980 interrupt-sequence", it no longer has any effect on the code. */
981 static int remote_break;
984 set_remotebreak (char *args, int from_tty, struct cmd_list_element *c)
987 interrupt_sequence_mode = interrupt_sequence_break;
989 interrupt_sequence_mode = interrupt_sequence_control_c;
993 show_remotebreak (struct ui_file *file, int from_tty,
994 struct cmd_list_element *c,
999 /* This variable sets the number of bits in an address that are to be
1000 sent in a memory ("M" or "m") packet. Normally, after stripping
1001 leading zeros, the entire address would be sent. This variable
1002 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1003 initial implementation of remote.c restricted the address sent in
1004 memory packets to ``host::sizeof long'' bytes - (typically 32
1005 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1006 address was never sent. Since fixing this bug may cause a break in
1007 some remote targets this variable is principly provided to
1008 facilitate backward compatibility. */
1010 static unsigned int remote_address_size;
1012 /* Temporary to track who currently owns the terminal. See
1013 remote_terminal_* for more details. */
1015 static int remote_async_terminal_ours_p;
1018 /* User configurable variables for the number of characters in a
1019 memory read/write packet. MIN (rsa->remote_packet_size,
1020 rsa->sizeof_g_packet) is the default. Some targets need smaller
1021 values (fifo overruns, et.al.) and some users need larger values
1022 (speed up transfers). The variables ``preferred_*'' (the user
1023 request), ``current_*'' (what was actually set) and ``forced_*''
1024 (Positive - a soft limit, negative - a hard limit). */
1026 struct memory_packet_config
1033 /* The default max memory-write-packet-size. The 16k is historical.
1034 (It came from older GDB's using alloca for buffers and the
1035 knowledge (folklore?) that some hosts don't cope very well with
1036 large alloca calls.) */
1037 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1039 /* The minimum remote packet size for memory transfers. Ensures we
1040 can write at least one byte. */
1041 #define MIN_MEMORY_PACKET_SIZE 20
1043 /* Compute the current size of a read/write packet. Since this makes
1044 use of ``actual_register_packet_size'' the computation is dynamic. */
1047 get_memory_packet_size (struct memory_packet_config *config)
1049 struct remote_state *rs = get_remote_state ();
1050 struct remote_arch_state *rsa = get_remote_arch_state ();
1053 if (config->fixed_p)
1055 if (config->size <= 0)
1056 what_they_get = DEFAULT_MAX_MEMORY_PACKET_SIZE;
1058 what_they_get = config->size;
1062 what_they_get = get_remote_packet_size ();
1063 /* Limit the packet to the size specified by the user. */
1064 if (config->size > 0
1065 && what_they_get > config->size)
1066 what_they_get = config->size;
1068 /* Limit it to the size of the targets ``g'' response unless we have
1069 permission from the stub to use a larger packet size. */
1070 if (rs->explicit_packet_size == 0
1071 && rsa->actual_register_packet_size > 0
1072 && what_they_get > rsa->actual_register_packet_size)
1073 what_they_get = rsa->actual_register_packet_size;
1075 if (what_they_get < MIN_MEMORY_PACKET_SIZE)
1076 what_they_get = MIN_MEMORY_PACKET_SIZE;
1078 /* Make sure there is room in the global buffer for this packet
1079 (including its trailing NUL byte). */
1080 if (rs->buf_size < what_they_get + 1)
1082 rs->buf_size = 2 * what_they_get;
1083 rs->buf = (char *) xrealloc (rs->buf, 2 * what_they_get);
1086 return what_they_get;
1089 /* Update the size of a read/write packet. If they user wants
1090 something really big then do a sanity check. */
1093 set_memory_packet_size (char *args, struct memory_packet_config *config)
1095 int fixed_p = config->fixed_p;
1096 long size = config->size;
1099 error (_("Argument required (integer, `fixed' or `limited')."));
1100 else if (strcmp (args, "hard") == 0
1101 || strcmp (args, "fixed") == 0)
1103 else if (strcmp (args, "soft") == 0
1104 || strcmp (args, "limit") == 0)
1110 size = strtoul (args, &end, 0);
1112 error (_("Invalid %s (bad syntax)."), config->name);
1114 /* Instead of explicitly capping the size of a packet to or
1115 disallowing it, the user is allowed to set the size to
1116 something arbitrarily large. */
1119 /* So that the query shows the correct value. */
1121 size = DEFAULT_MAX_MEMORY_PACKET_SIZE;
1124 if (fixed_p && !config->fixed_p)
1126 if (! query (_("The target may not be able to correctly handle a %s\n"
1127 "of %ld bytes. Change the packet size? "),
1128 config->name, size))
1129 error (_("Packet size not changed."));
1131 /* Update the config. */
1132 config->fixed_p = fixed_p;
1133 config->size = size;
1137 show_memory_packet_size (struct memory_packet_config *config)
1139 printf_filtered (_("The %s is %ld. "), config->name, config->size);
1140 if (config->fixed_p)
1141 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1142 get_memory_packet_size (config));
1144 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1145 get_memory_packet_size (config));
1148 static struct memory_packet_config memory_write_packet_config =
1150 "memory-write-packet-size",
1154 set_memory_write_packet_size (char *args, int from_tty)
1156 set_memory_packet_size (args, &memory_write_packet_config);
1160 show_memory_write_packet_size (char *args, int from_tty)
1162 show_memory_packet_size (&memory_write_packet_config);
1166 get_memory_write_packet_size (void)
1168 return get_memory_packet_size (&memory_write_packet_config);
1171 static struct memory_packet_config memory_read_packet_config =
1173 "memory-read-packet-size",
1177 set_memory_read_packet_size (char *args, int from_tty)
1179 set_memory_packet_size (args, &memory_read_packet_config);
1183 show_memory_read_packet_size (char *args, int from_tty)
1185 show_memory_packet_size (&memory_read_packet_config);
1189 get_memory_read_packet_size (void)
1191 long size = get_memory_packet_size (&memory_read_packet_config);
1193 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1194 extra buffer size argument before the memory read size can be
1195 increased beyond this. */
1196 if (size > get_remote_packet_size ())
1197 size = get_remote_packet_size ();
1202 /* Generic configuration support for packets the stub optionally
1203 supports. Allows the user to specify the use of the packet as well
1204 as allowing GDB to auto-detect support in the remote stub. */
1208 PACKET_SUPPORT_UNKNOWN = 0,
1213 struct packet_config
1218 /* If auto, GDB auto-detects support for this packet or feature,
1219 either through qSupported, or by trying the packet and looking
1220 at the response. If true, GDB assumes the target supports this
1221 packet. If false, the packet is disabled. Configs that don't
1222 have an associated command always have this set to auto. */
1223 enum auto_boolean detect;
1225 /* Does the target support this packet? */
1226 enum packet_support support;
1229 /* Analyze a packet's return value and update the packet config
1239 static enum packet_support packet_config_support (struct packet_config *config);
1240 static enum packet_support packet_support (int packet);
1243 show_packet_config_cmd (struct packet_config *config)
1245 const char *support = "internal-error";
1247 switch (packet_config_support (config))
1250 support = "enabled";
1252 case PACKET_DISABLE:
1253 support = "disabled";
1255 case PACKET_SUPPORT_UNKNOWN:
1256 support = "unknown";
1259 switch (config->detect)
1261 case AUTO_BOOLEAN_AUTO:
1262 printf_filtered (_("Support for the `%s' packet "
1263 "is auto-detected, currently %s.\n"),
1264 config->name, support);
1266 case AUTO_BOOLEAN_TRUE:
1267 case AUTO_BOOLEAN_FALSE:
1268 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1269 config->name, support);
1275 add_packet_config_cmd (struct packet_config *config, const char *name,
1276 const char *title, int legacy)
1282 config->name = name;
1283 config->title = title;
1284 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1286 show_doc = xstrprintf ("Show current use of remote "
1287 "protocol `%s' (%s) packet",
1289 /* set/show TITLE-packet {auto,on,off} */
1290 cmd_name = xstrprintf ("%s-packet", title);
1291 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
1292 &config->detect, set_doc,
1293 show_doc, NULL, /* help_doc */
1295 show_remote_protocol_packet_cmd,
1296 &remote_set_cmdlist, &remote_show_cmdlist);
1297 /* The command code copies the documentation strings. */
1300 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1305 legacy_name = xstrprintf ("%s-packet", name);
1306 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1307 &remote_set_cmdlist);
1308 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1309 &remote_show_cmdlist);
1313 static enum packet_result
1314 packet_check_result (const char *buf)
1318 /* The stub recognized the packet request. Check that the
1319 operation succeeded. */
1321 && isxdigit (buf[1]) && isxdigit (buf[2])
1323 /* "Enn" - definitly an error. */
1324 return PACKET_ERROR;
1326 /* Always treat "E." as an error. This will be used for
1327 more verbose error messages, such as E.memtypes. */
1328 if (buf[0] == 'E' && buf[1] == '.')
1329 return PACKET_ERROR;
1331 /* The packet may or may not be OK. Just assume it is. */
1335 /* The stub does not support the packet. */
1336 return PACKET_UNKNOWN;
1339 static enum packet_result
1340 packet_ok (const char *buf, struct packet_config *config)
1342 enum packet_result result;
1344 if (config->detect != AUTO_BOOLEAN_TRUE
1345 && config->support == PACKET_DISABLE)
1346 internal_error (__FILE__, __LINE__,
1347 _("packet_ok: attempt to use a disabled packet"));
1349 result = packet_check_result (buf);
1354 /* The stub recognized the packet request. */
1355 if (config->support == PACKET_SUPPORT_UNKNOWN)
1358 fprintf_unfiltered (gdb_stdlog,
1359 "Packet %s (%s) is supported\n",
1360 config->name, config->title);
1361 config->support = PACKET_ENABLE;
1364 case PACKET_UNKNOWN:
1365 /* The stub does not support the packet. */
1366 if (config->detect == AUTO_BOOLEAN_AUTO
1367 && config->support == PACKET_ENABLE)
1369 /* If the stub previously indicated that the packet was
1370 supported then there is a protocol error. */
1371 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1372 config->name, config->title);
1374 else if (config->detect == AUTO_BOOLEAN_TRUE)
1376 /* The user set it wrong. */
1377 error (_("Enabled packet %s (%s) not recognized by stub"),
1378 config->name, config->title);
1382 fprintf_unfiltered (gdb_stdlog,
1383 "Packet %s (%s) is NOT supported\n",
1384 config->name, config->title);
1385 config->support = PACKET_DISABLE;
1406 PACKET_vFile_pwrite,
1408 PACKET_vFile_unlink,
1409 PACKET_vFile_readlink,
1412 PACKET_qXfer_features,
1413 PACKET_qXfer_exec_file,
1414 PACKET_qXfer_libraries,
1415 PACKET_qXfer_libraries_svr4,
1416 PACKET_qXfer_memory_map,
1417 PACKET_qXfer_spu_read,
1418 PACKET_qXfer_spu_write,
1419 PACKET_qXfer_osdata,
1420 PACKET_qXfer_threads,
1421 PACKET_qXfer_statictrace_read,
1422 PACKET_qXfer_traceframe_info,
1428 PACKET_QPassSignals,
1429 PACKET_QCatchSyscalls,
1430 PACKET_QProgramSignals,
1432 PACKET_qSearch_memory,
1435 PACKET_QStartNoAckMode,
1437 PACKET_qXfer_siginfo_read,
1438 PACKET_qXfer_siginfo_write,
1441 /* Support for conditional tracepoints. */
1442 PACKET_ConditionalTracepoints,
1444 /* Support for target-side breakpoint conditions. */
1445 PACKET_ConditionalBreakpoints,
1447 /* Support for target-side breakpoint commands. */
1448 PACKET_BreakpointCommands,
1450 /* Support for fast tracepoints. */
1451 PACKET_FastTracepoints,
1453 /* Support for static tracepoints. */
1454 PACKET_StaticTracepoints,
1456 /* Support for installing tracepoints while a trace experiment is
1458 PACKET_InstallInTrace,
1462 PACKET_TracepointSource,
1465 PACKET_QDisableRandomization,
1467 PACKET_QTBuffer_size,
1471 PACKET_qXfer_btrace,
1473 /* Support for the QNonStop packet. */
1476 /* Support for the QThreadEvents packet. */
1477 PACKET_QThreadEvents,
1479 /* Support for multi-process extensions. */
1480 PACKET_multiprocess_feature,
1482 /* Support for enabling and disabling tracepoints while a trace
1483 experiment is running. */
1484 PACKET_EnableDisableTracepoints_feature,
1486 /* Support for collecting strings using the tracenz bytecode. */
1487 PACKET_tracenz_feature,
1489 /* Support for continuing to run a trace experiment while GDB is
1491 PACKET_DisconnectedTracing_feature,
1493 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1494 PACKET_augmented_libraries_svr4_read_feature,
1496 /* Support for the qXfer:btrace-conf:read packet. */
1497 PACKET_qXfer_btrace_conf,
1499 /* Support for the Qbtrace-conf:bts:size packet. */
1500 PACKET_Qbtrace_conf_bts_size,
1502 /* Support for swbreak+ feature. */
1503 PACKET_swbreak_feature,
1505 /* Support for hwbreak+ feature. */
1506 PACKET_hwbreak_feature,
1508 /* Support for fork events. */
1509 PACKET_fork_event_feature,
1511 /* Support for vfork events. */
1512 PACKET_vfork_event_feature,
1514 /* Support for the Qbtrace-conf:pt:size packet. */
1515 PACKET_Qbtrace_conf_pt_size,
1517 /* Support for exec events. */
1518 PACKET_exec_event_feature,
1520 /* Support for query supported vCont actions. */
1521 PACKET_vContSupported,
1523 /* Support remote CTRL-C. */
1526 /* Support TARGET_WAITKIND_NO_RESUMED. */
1532 static struct packet_config remote_protocol_packets[PACKET_MAX];
1534 /* Returns the packet's corresponding "set remote foo-packet" command
1535 state. See struct packet_config for more details. */
1537 static enum auto_boolean
1538 packet_set_cmd_state (int packet)
1540 return remote_protocol_packets[packet].detect;
1543 /* Returns whether a given packet or feature is supported. This takes
1544 into account the state of the corresponding "set remote foo-packet"
1545 command, which may be used to bypass auto-detection. */
1547 static enum packet_support
1548 packet_config_support (struct packet_config *config)
1550 switch (config->detect)
1552 case AUTO_BOOLEAN_TRUE:
1553 return PACKET_ENABLE;
1554 case AUTO_BOOLEAN_FALSE:
1555 return PACKET_DISABLE;
1556 case AUTO_BOOLEAN_AUTO:
1557 return config->support;
1559 gdb_assert_not_reached (_("bad switch"));
1563 /* Same as packet_config_support, but takes the packet's enum value as
1566 static enum packet_support
1567 packet_support (int packet)
1569 struct packet_config *config = &remote_protocol_packets[packet];
1571 return packet_config_support (config);
1575 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
1576 struct cmd_list_element *c,
1579 struct packet_config *packet;
1581 for (packet = remote_protocol_packets;
1582 packet < &remote_protocol_packets[PACKET_MAX];
1585 if (&packet->detect == c->var)
1587 show_packet_config_cmd (packet);
1591 internal_error (__FILE__, __LINE__, _("Could not find config for %s"),
1595 /* Should we try one of the 'Z' requests? */
1599 Z_PACKET_SOFTWARE_BP,
1600 Z_PACKET_HARDWARE_BP,
1607 /* For compatibility with older distributions. Provide a ``set remote
1608 Z-packet ...'' command that updates all the Z packet types. */
1610 static enum auto_boolean remote_Z_packet_detect;
1613 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
1614 struct cmd_list_element *c)
1618 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1619 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
1623 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
1624 struct cmd_list_element *c,
1629 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1631 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
1635 /* Returns true if the multi-process extensions are in effect. */
1638 remote_multi_process_p (struct remote_state *rs)
1640 return packet_support (PACKET_multiprocess_feature) == PACKET_ENABLE;
1643 /* Returns true if fork events are supported. */
1646 remote_fork_event_p (struct remote_state *rs)
1648 return packet_support (PACKET_fork_event_feature) == PACKET_ENABLE;
1651 /* Returns true if vfork events are supported. */
1654 remote_vfork_event_p (struct remote_state *rs)
1656 return packet_support (PACKET_vfork_event_feature) == PACKET_ENABLE;
1659 /* Returns true if exec events are supported. */
1662 remote_exec_event_p (struct remote_state *rs)
1664 return packet_support (PACKET_exec_event_feature) == PACKET_ENABLE;
1667 /* Insert fork catchpoint target routine. If fork events are enabled
1668 then return success, nothing more to do. */
1671 remote_insert_fork_catchpoint (struct target_ops *ops, int pid)
1673 struct remote_state *rs = get_remote_state ();
1675 return !remote_fork_event_p (rs);
1678 /* Remove fork catchpoint target routine. Nothing to do, just
1682 remote_remove_fork_catchpoint (struct target_ops *ops, int pid)
1687 /* Insert vfork catchpoint target routine. If vfork events are enabled
1688 then return success, nothing more to do. */
1691 remote_insert_vfork_catchpoint (struct target_ops *ops, int pid)
1693 struct remote_state *rs = get_remote_state ();
1695 return !remote_vfork_event_p (rs);
1698 /* Remove vfork catchpoint target routine. Nothing to do, just
1702 remote_remove_vfork_catchpoint (struct target_ops *ops, int pid)
1707 /* Insert exec catchpoint target routine. If exec events are
1708 enabled, just return success. */
1711 remote_insert_exec_catchpoint (struct target_ops *ops, int pid)
1713 struct remote_state *rs = get_remote_state ();
1715 return !remote_exec_event_p (rs);
1718 /* Remove exec catchpoint target routine. Nothing to do, just
1722 remote_remove_exec_catchpoint (struct target_ops *ops, int pid)
1728 /* Asynchronous signal handle registered as event loop source for
1729 when we have pending events ready to be passed to the core. */
1731 static struct async_event_handler *remote_async_inferior_event_token;
1735 static ptid_t magic_null_ptid;
1736 static ptid_t not_sent_ptid;
1737 static ptid_t any_thread_ptid;
1739 /* Find out if the stub attached to PID (and hence GDB should offer to
1740 detach instead of killing it when bailing out). */
1743 remote_query_attached (int pid)
1745 struct remote_state *rs = get_remote_state ();
1746 size_t size = get_remote_packet_size ();
1748 if (packet_support (PACKET_qAttached) == PACKET_DISABLE)
1751 if (remote_multi_process_p (rs))
1752 xsnprintf (rs->buf, size, "qAttached:%x", pid);
1754 xsnprintf (rs->buf, size, "qAttached");
1757 getpkt (&rs->buf, &rs->buf_size, 0);
1759 switch (packet_ok (rs->buf,
1760 &remote_protocol_packets[PACKET_qAttached]))
1763 if (strcmp (rs->buf, "1") == 0)
1767 warning (_("Remote failure reply: %s"), rs->buf);
1769 case PACKET_UNKNOWN:
1776 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1777 has been invented by GDB, instead of reported by the target. Since
1778 we can be connected to a remote system before before knowing about
1779 any inferior, mark the target with execution when we find the first
1780 inferior. If ATTACHED is 1, then we had just attached to this
1781 inferior. If it is 0, then we just created this inferior. If it
1782 is -1, then try querying the remote stub to find out if it had
1783 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1784 attempt to open this inferior's executable as the main executable
1785 if no main executable is open already. */
1787 static struct inferior *
1788 remote_add_inferior (int fake_pid_p, int pid, int attached,
1791 struct inferior *inf;
1793 /* Check whether this process we're learning about is to be
1794 considered attached, or if is to be considered to have been
1795 spawned by the stub. */
1797 attached = remote_query_attached (pid);
1799 if (gdbarch_has_global_solist (target_gdbarch ()))
1801 /* If the target shares code across all inferiors, then every
1802 attach adds a new inferior. */
1803 inf = add_inferior (pid);
1805 /* ... and every inferior is bound to the same program space.
1806 However, each inferior may still have its own address
1808 inf->aspace = maybe_new_address_space ();
1809 inf->pspace = current_program_space;
1813 /* In the traditional debugging scenario, there's a 1-1 match
1814 between program/address spaces. We simply bind the inferior
1815 to the program space's address space. */
1816 inf = current_inferior ();
1817 inferior_appeared (inf, pid);
1820 inf->attach_flag = attached;
1821 inf->fake_pid_p = fake_pid_p;
1823 /* If no main executable is currently open then attempt to
1824 open the file that was executed to create this inferior. */
1825 if (try_open_exec && get_exec_file (0) == NULL)
1826 exec_file_locate_attach (pid, 0, 1);
1831 static struct private_thread_info *
1832 get_private_info_thread (struct thread_info *info);
1834 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1835 according to RUNNING. */
1838 remote_add_thread (ptid_t ptid, int running, int executing)
1840 struct remote_state *rs = get_remote_state ();
1841 struct thread_info *thread;
1843 /* GDB historically didn't pull threads in the initial connection
1844 setup. If the remote target doesn't even have a concept of
1845 threads (e.g., a bare-metal target), even if internally we
1846 consider that a single-threaded target, mentioning a new thread
1847 might be confusing to the user. Be silent then, preserving the
1848 age old behavior. */
1849 if (rs->starting_up)
1850 thread = add_thread_silent (ptid);
1852 thread = add_thread (ptid);
1854 get_private_info_thread (thread)->vcont_resumed = executing;
1855 set_executing (ptid, executing);
1856 set_running (ptid, running);
1859 /* Come here when we learn about a thread id from the remote target.
1860 It may be the first time we hear about such thread, so take the
1861 opportunity to add it to GDB's thread list. In case this is the
1862 first time we're noticing its corresponding inferior, add it to
1863 GDB's inferior list as well. EXECUTING indicates whether the
1864 thread is (internally) executing or stopped. */
1867 remote_notice_new_inferior (ptid_t currthread, int executing)
1869 /* In non-stop mode, we assume new found threads are (externally)
1870 running until proven otherwise with a stop reply. In all-stop,
1871 we can only get here if all threads are stopped. */
1872 int running = target_is_non_stop_p () ? 1 : 0;
1874 /* If this is a new thread, add it to GDB's thread list.
1875 If we leave it up to WFI to do this, bad things will happen. */
1877 if (in_thread_list (currthread) && is_exited (currthread))
1879 /* We're seeing an event on a thread id we knew had exited.
1880 This has to be a new thread reusing the old id. Add it. */
1881 remote_add_thread (currthread, running, executing);
1885 if (!in_thread_list (currthread))
1887 struct inferior *inf = NULL;
1888 int pid = ptid_get_pid (currthread);
1890 if (ptid_is_pid (inferior_ptid)
1891 && pid == ptid_get_pid (inferior_ptid))
1893 /* inferior_ptid has no thread member yet. This can happen
1894 with the vAttach -> remote_wait,"TAAthread:" path if the
1895 stub doesn't support qC. This is the first stop reported
1896 after an attach, so this is the main thread. Update the
1897 ptid in the thread list. */
1898 if (in_thread_list (pid_to_ptid (pid)))
1899 thread_change_ptid (inferior_ptid, currthread);
1902 remote_add_thread (currthread, running, executing);
1903 inferior_ptid = currthread;
1908 if (ptid_equal (magic_null_ptid, inferior_ptid))
1910 /* inferior_ptid is not set yet. This can happen with the
1911 vRun -> remote_wait,"TAAthread:" path if the stub
1912 doesn't support qC. This is the first stop reported
1913 after an attach, so this is the main thread. Update the
1914 ptid in the thread list. */
1915 thread_change_ptid (inferior_ptid, currthread);
1919 /* When connecting to a target remote, or to a target
1920 extended-remote which already was debugging an inferior, we
1921 may not know about it yet. Add it before adding its child
1922 thread, so notifications are emitted in a sensible order. */
1923 if (!in_inferior_list (ptid_get_pid (currthread)))
1925 struct remote_state *rs = get_remote_state ();
1926 int fake_pid_p = !remote_multi_process_p (rs);
1928 inf = remote_add_inferior (fake_pid_p,
1929 ptid_get_pid (currthread), -1, 1);
1932 /* This is really a new thread. Add it. */
1933 remote_add_thread (currthread, running, executing);
1935 /* If we found a new inferior, let the common code do whatever
1936 it needs to with it (e.g., read shared libraries, insert
1937 breakpoints), unless we're just setting up an all-stop
1941 struct remote_state *rs = get_remote_state ();
1943 if (!rs->starting_up)
1944 notice_new_inferior (currthread, executing, 0);
1949 /* Return THREAD's private thread data, creating it if necessary. */
1951 static struct private_thread_info *
1952 get_private_info_thread (struct thread_info *thread)
1954 gdb_assert (thread != NULL);
1956 if (thread->priv == NULL)
1958 struct private_thread_info *priv = XNEW (struct private_thread_info);
1960 thread->private_dtor = free_private_thread_info;
1961 thread->priv = priv;
1967 priv->last_resume_step = 0;
1968 priv->last_resume_sig = GDB_SIGNAL_0;
1969 priv->vcont_resumed = 0;
1972 return thread->priv;
1975 /* Return PTID's private thread data, creating it if necessary. */
1977 static struct private_thread_info *
1978 get_private_info_ptid (ptid_t ptid)
1980 struct thread_info *info = find_thread_ptid (ptid);
1982 return get_private_info_thread (info);
1985 /* Call this function as a result of
1986 1) A halt indication (T packet) containing a thread id
1987 2) A direct query of currthread
1988 3) Successful execution of set thread */
1991 record_currthread (struct remote_state *rs, ptid_t currthread)
1993 rs->general_thread = currthread;
1996 /* If 'QPassSignals' is supported, tell the remote stub what signals
1997 it can simply pass through to the inferior without reporting. */
2000 remote_pass_signals (struct target_ops *self,
2001 int numsigs, unsigned char *pass_signals)
2003 if (packet_support (PACKET_QPassSignals) != PACKET_DISABLE)
2005 char *pass_packet, *p;
2007 struct remote_state *rs = get_remote_state ();
2009 gdb_assert (numsigs < 256);
2010 for (i = 0; i < numsigs; i++)
2012 if (pass_signals[i])
2015 pass_packet = (char *) xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
2016 strcpy (pass_packet, "QPassSignals:");
2017 p = pass_packet + strlen (pass_packet);
2018 for (i = 0; i < numsigs; i++)
2020 if (pass_signals[i])
2023 *p++ = tohex (i >> 4);
2024 *p++ = tohex (i & 15);
2033 if (!rs->last_pass_packet || strcmp (rs->last_pass_packet, pass_packet))
2035 putpkt (pass_packet);
2036 getpkt (&rs->buf, &rs->buf_size, 0);
2037 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QPassSignals]);
2038 if (rs->last_pass_packet)
2039 xfree (rs->last_pass_packet);
2040 rs->last_pass_packet = pass_packet;
2043 xfree (pass_packet);
2047 /* If 'QCatchSyscalls' is supported, tell the remote stub
2048 to report syscalls to GDB. */
2051 remote_set_syscall_catchpoint (struct target_ops *self,
2052 int pid, int needed, int any_count,
2053 int table_size, int *table)
2056 enum packet_result result;
2059 if (packet_support (PACKET_QCatchSyscalls) == PACKET_DISABLE)
2061 /* Not supported. */
2065 if (needed && !any_count)
2069 /* Count how many syscalls are to be caught (table[sysno] != 0). */
2070 for (i = 0; i < table_size; i++)
2079 fprintf_unfiltered (gdb_stdlog,
2080 "remote_set_syscall_catchpoint "
2081 "pid %d needed %d any_count %d n_sysno %d\n",
2082 pid, needed, any_count, n_sysno);
2087 /* Prepare a packet with the sysno list, assuming max 8+1
2088 characters for a sysno. If the resulting packet size is too
2089 big, fallback on the non-selective packet. */
2090 const int maxpktsz = strlen ("QCatchSyscalls:1") + n_sysno * 9 + 1;
2092 catch_packet = (char *) xmalloc (maxpktsz);
2093 strcpy (catch_packet, "QCatchSyscalls:1");
2102 /* Add in catch_packet each syscall to be caught (table[i] != 0). */
2103 for (i = 0; i < table_size; i++)
2106 p += xsnprintf (p, catch_packet + maxpktsz - p, ";%x", i);
2109 if (strlen (catch_packet) > get_remote_packet_size ())
2111 /* catch_packet too big. Fallback to less efficient
2112 non selective mode, with GDB doing the filtering. */
2113 catch_packet[sizeof ("QCatchSyscalls:1") - 1] = 0;
2117 catch_packet = xstrdup ("QCatchSyscalls:0");
2120 struct cleanup *old_chain = make_cleanup (xfree, catch_packet);
2121 struct remote_state *rs = get_remote_state ();
2123 putpkt (catch_packet);
2124 getpkt (&rs->buf, &rs->buf_size, 0);
2125 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_QCatchSyscalls]);
2126 do_cleanups (old_chain);
2127 if (result == PACKET_OK)
2134 /* If 'QProgramSignals' is supported, tell the remote stub what
2135 signals it should pass through to the inferior when detaching. */
2138 remote_program_signals (struct target_ops *self,
2139 int numsigs, unsigned char *signals)
2141 if (packet_support (PACKET_QProgramSignals) != PACKET_DISABLE)
2145 struct remote_state *rs = get_remote_state ();
2147 gdb_assert (numsigs < 256);
2148 for (i = 0; i < numsigs; i++)
2153 packet = (char *) xmalloc (count * 3 + strlen ("QProgramSignals:") + 1);
2154 strcpy (packet, "QProgramSignals:");
2155 p = packet + strlen (packet);
2156 for (i = 0; i < numsigs; i++)
2158 if (signal_pass_state (i))
2161 *p++ = tohex (i >> 4);
2162 *p++ = tohex (i & 15);
2171 if (!rs->last_program_signals_packet
2172 || strcmp (rs->last_program_signals_packet, packet) != 0)
2175 getpkt (&rs->buf, &rs->buf_size, 0);
2176 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QProgramSignals]);
2177 xfree (rs->last_program_signals_packet);
2178 rs->last_program_signals_packet = packet;
2185 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2186 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2187 thread. If GEN is set, set the general thread, if not, then set
2188 the step/continue thread. */
2190 set_thread (ptid_t ptid, int gen)
2192 struct remote_state *rs = get_remote_state ();
2193 ptid_t state = gen ? rs->general_thread : rs->continue_thread;
2194 char *buf = rs->buf;
2195 char *endbuf = rs->buf + get_remote_packet_size ();
2197 if (ptid_equal (state, ptid))
2201 *buf++ = gen ? 'g' : 'c';
2202 if (ptid_equal (ptid, magic_null_ptid))
2203 xsnprintf (buf, endbuf - buf, "0");
2204 else if (ptid_equal (ptid, any_thread_ptid))
2205 xsnprintf (buf, endbuf - buf, "0");
2206 else if (ptid_equal (ptid, minus_one_ptid))
2207 xsnprintf (buf, endbuf - buf, "-1");
2209 write_ptid (buf, endbuf, ptid);
2211 getpkt (&rs->buf, &rs->buf_size, 0);
2213 rs->general_thread = ptid;
2215 rs->continue_thread = ptid;
2219 set_general_thread (ptid_t ptid)
2221 set_thread (ptid, 1);
2225 set_continue_thread (ptid_t ptid)
2227 set_thread (ptid, 0);
2230 /* Change the remote current process. Which thread within the process
2231 ends up selected isn't important, as long as it is the same process
2232 as what INFERIOR_PTID points to.
2234 This comes from that fact that there is no explicit notion of
2235 "selected process" in the protocol. The selected process for
2236 general operations is the process the selected general thread
2240 set_general_process (void)
2242 struct remote_state *rs = get_remote_state ();
2244 /* If the remote can't handle multiple processes, don't bother. */
2245 if (!remote_multi_process_p (rs))
2248 /* We only need to change the remote current thread if it's pointing
2249 at some other process. */
2250 if (ptid_get_pid (rs->general_thread) != ptid_get_pid (inferior_ptid))
2251 set_general_thread (inferior_ptid);
2255 /* Return nonzero if this is the main thread that we made up ourselves
2256 to model non-threaded targets as single-threaded. */
2259 remote_thread_always_alive (struct target_ops *ops, ptid_t ptid)
2261 if (ptid_equal (ptid, magic_null_ptid))
2262 /* The main thread is always alive. */
2265 if (ptid_get_pid (ptid) != 0 && ptid_get_lwp (ptid) == 0)
2266 /* The main thread is always alive. This can happen after a
2267 vAttach, if the remote side doesn't support
2274 /* Return nonzero if the thread PTID is still alive on the remote
2278 remote_thread_alive (struct target_ops *ops, ptid_t ptid)
2280 struct remote_state *rs = get_remote_state ();
2283 /* Check if this is a thread that we made up ourselves to model
2284 non-threaded targets as single-threaded. */
2285 if (remote_thread_always_alive (ops, ptid))
2289 endp = rs->buf + get_remote_packet_size ();
2292 write_ptid (p, endp, ptid);
2295 getpkt (&rs->buf, &rs->buf_size, 0);
2296 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
2299 /* Return a pointer to a thread name if we know it and NULL otherwise.
2300 The thread_info object owns the memory for the name. */
2303 remote_thread_name (struct target_ops *ops, struct thread_info *info)
2305 if (info->priv != NULL)
2306 return info->priv->name;
2311 /* About these extended threadlist and threadinfo packets. They are
2312 variable length packets but, the fields within them are often fixed
2313 length. They are redundent enough to send over UDP as is the
2314 remote protocol in general. There is a matching unit test module
2317 /* WARNING: This threadref data structure comes from the remote O.S.,
2318 libstub protocol encoding, and remote.c. It is not particularly
2321 /* Right now, the internal structure is int. We want it to be bigger.
2322 Plan to fix this. */
2324 typedef int gdb_threadref; /* Internal GDB thread reference. */
2326 /* gdb_ext_thread_info is an internal GDB data structure which is
2327 equivalent to the reply of the remote threadinfo packet. */
2329 struct gdb_ext_thread_info
2331 threadref threadid; /* External form of thread reference. */
2332 int active; /* Has state interesting to GDB?
2334 char display[256]; /* Brief state display, name,
2335 blocked/suspended. */
2336 char shortname[32]; /* To be used to name threads. */
2337 char more_display[256]; /* Long info, statistics, queue depth,
2341 /* The volume of remote transfers can be limited by submitting
2342 a mask containing bits specifying the desired information.
2343 Use a union of these values as the 'selection' parameter to
2344 get_thread_info. FIXME: Make these TAG names more thread specific. */
2346 #define TAG_THREADID 1
2347 #define TAG_EXISTS 2
2348 #define TAG_DISPLAY 4
2349 #define TAG_THREADNAME 8
2350 #define TAG_MOREDISPLAY 16
2352 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2354 static char *unpack_nibble (char *buf, int *val);
2356 static char *unpack_byte (char *buf, int *value);
2358 static char *pack_int (char *buf, int value);
2360 static char *unpack_int (char *buf, int *value);
2362 static char *unpack_string (char *src, char *dest, int length);
2364 static char *pack_threadid (char *pkt, threadref *id);
2366 static char *unpack_threadid (char *inbuf, threadref *id);
2368 void int_to_threadref (threadref *id, int value);
2370 static int threadref_to_int (threadref *ref);
2372 static void copy_threadref (threadref *dest, threadref *src);
2374 static int threadmatch (threadref *dest, threadref *src);
2376 static char *pack_threadinfo_request (char *pkt, int mode,
2379 static int remote_unpack_thread_info_response (char *pkt,
2380 threadref *expectedref,
2381 struct gdb_ext_thread_info
2385 static int remote_get_threadinfo (threadref *threadid,
2386 int fieldset, /*TAG mask */
2387 struct gdb_ext_thread_info *info);
2389 static char *pack_threadlist_request (char *pkt, int startflag,
2391 threadref *nextthread);
2393 static int parse_threadlist_response (char *pkt,
2395 threadref *original_echo,
2396 threadref *resultlist,
2399 static int remote_get_threadlist (int startflag,
2400 threadref *nextthread,
2404 threadref *threadlist);
2406 typedef int (*rmt_thread_action) (threadref *ref, void *context);
2408 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
2409 void *context, int looplimit);
2411 static int remote_newthread_step (threadref *ref, void *context);
2414 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2415 buffer we're allowed to write to. Returns
2416 BUF+CHARACTERS_WRITTEN. */
2419 write_ptid (char *buf, const char *endbuf, ptid_t ptid)
2422 struct remote_state *rs = get_remote_state ();
2424 if (remote_multi_process_p (rs))
2426 pid = ptid_get_pid (ptid);
2428 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
2430 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
2432 tid = ptid_get_lwp (ptid);
2434 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
2436 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
2441 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
2442 passed the last parsed char. Returns null_ptid on error. */
2445 read_ptid (char *buf, char **obuf)
2449 ULONGEST pid = 0, tid = 0;
2453 /* Multi-process ptid. */
2454 pp = unpack_varlen_hex (p + 1, &pid);
2456 error (_("invalid remote ptid: %s"), p);
2459 pp = unpack_varlen_hex (p + 1, &tid);
2462 return ptid_build (pid, tid, 0);
2465 /* No multi-process. Just a tid. */
2466 pp = unpack_varlen_hex (p, &tid);
2468 /* Return null_ptid when no thread id is found. */
2476 /* Since the stub is not sending a process id, then default to
2477 what's in inferior_ptid, unless it's null at this point. If so,
2478 then since there's no way to know the pid of the reported
2479 threads, use the magic number. */
2480 if (ptid_equal (inferior_ptid, null_ptid))
2481 pid = ptid_get_pid (magic_null_ptid);
2483 pid = ptid_get_pid (inferior_ptid);
2487 return ptid_build (pid, tid, 0);
2493 if (ch >= 'a' && ch <= 'f')
2494 return ch - 'a' + 10;
2495 if (ch >= '0' && ch <= '9')
2497 if (ch >= 'A' && ch <= 'F')
2498 return ch - 'A' + 10;
2503 stub_unpack_int (char *buff, int fieldlength)
2510 nibble = stubhex (*buff++);
2514 retval = retval << 4;
2520 unpack_nibble (char *buf, int *val)
2522 *val = fromhex (*buf++);
2527 unpack_byte (char *buf, int *value)
2529 *value = stub_unpack_int (buf, 2);
2534 pack_int (char *buf, int value)
2536 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
2537 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
2538 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
2539 buf = pack_hex_byte (buf, (value & 0xff));
2544 unpack_int (char *buf, int *value)
2546 *value = stub_unpack_int (buf, 8);
2550 #if 0 /* Currently unused, uncomment when needed. */
2551 static char *pack_string (char *pkt, char *string);
2554 pack_string (char *pkt, char *string)
2559 len = strlen (string);
2561 len = 200; /* Bigger than most GDB packets, junk??? */
2562 pkt = pack_hex_byte (pkt, len);
2566 if ((ch == '\0') || (ch == '#'))
2567 ch = '*'; /* Protect encapsulation. */
2572 #endif /* 0 (unused) */
2575 unpack_string (char *src, char *dest, int length)
2584 pack_threadid (char *pkt, threadref *id)
2587 unsigned char *altid;
2589 altid = (unsigned char *) id;
2590 limit = pkt + BUF_THREAD_ID_SIZE;
2592 pkt = pack_hex_byte (pkt, *altid++);
2598 unpack_threadid (char *inbuf, threadref *id)
2601 char *limit = inbuf + BUF_THREAD_ID_SIZE;
2604 altref = (char *) id;
2606 while (inbuf < limit)
2608 x = stubhex (*inbuf++);
2609 y = stubhex (*inbuf++);
2610 *altref++ = (x << 4) | y;
2615 /* Externally, threadrefs are 64 bits but internally, they are still
2616 ints. This is due to a mismatch of specifications. We would like
2617 to use 64bit thread references internally. This is an adapter
2621 int_to_threadref (threadref *id, int value)
2623 unsigned char *scan;
2625 scan = (unsigned char *) id;
2631 *scan++ = (value >> 24) & 0xff;
2632 *scan++ = (value >> 16) & 0xff;
2633 *scan++ = (value >> 8) & 0xff;
2634 *scan++ = (value & 0xff);
2638 threadref_to_int (threadref *ref)
2641 unsigned char *scan;
2647 value = (value << 8) | ((*scan++) & 0xff);
2652 copy_threadref (threadref *dest, threadref *src)
2655 unsigned char *csrc, *cdest;
2657 csrc = (unsigned char *) src;
2658 cdest = (unsigned char *) dest;
2665 threadmatch (threadref *dest, threadref *src)
2667 /* Things are broken right now, so just assume we got a match. */
2669 unsigned char *srcp, *destp;
2671 srcp = (char *) src;
2672 destp = (char *) dest;
2676 result &= (*srcp++ == *destp++) ? 1 : 0;
2683 threadid:1, # always request threadid
2690 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2693 pack_threadinfo_request (char *pkt, int mode, threadref *id)
2695 *pkt++ = 'q'; /* Info Query */
2696 *pkt++ = 'P'; /* process or thread info */
2697 pkt = pack_int (pkt, mode); /* mode */
2698 pkt = pack_threadid (pkt, id); /* threadid */
2699 *pkt = '\0'; /* terminate */
2703 /* These values tag the fields in a thread info response packet. */
2704 /* Tagging the fields allows us to request specific fields and to
2705 add more fields as time goes by. */
2707 #define TAG_THREADID 1 /* Echo the thread identifier. */
2708 #define TAG_EXISTS 2 /* Is this process defined enough to
2709 fetch registers and its stack? */
2710 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2711 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2712 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2716 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
2717 struct gdb_ext_thread_info *info)
2719 struct remote_state *rs = get_remote_state ();
2723 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
2726 /* info->threadid = 0; FIXME: implement zero_threadref. */
2728 info->display[0] = '\0';
2729 info->shortname[0] = '\0';
2730 info->more_display[0] = '\0';
2732 /* Assume the characters indicating the packet type have been
2734 pkt = unpack_int (pkt, &mask); /* arg mask */
2735 pkt = unpack_threadid (pkt, &ref);
2738 warning (_("Incomplete response to threadinfo request."));
2739 if (!threadmatch (&ref, expectedref))
2740 { /* This is an answer to a different request. */
2741 warning (_("ERROR RMT Thread info mismatch."));
2744 copy_threadref (&info->threadid, &ref);
2746 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2748 /* Packets are terminated with nulls. */
2749 while ((pkt < limit) && mask && *pkt)
2751 pkt = unpack_int (pkt, &tag); /* tag */
2752 pkt = unpack_byte (pkt, &length); /* length */
2753 if (!(tag & mask)) /* Tags out of synch with mask. */
2755 warning (_("ERROR RMT: threadinfo tag mismatch."));
2759 if (tag == TAG_THREADID)
2763 warning (_("ERROR RMT: length of threadid is not 16."));
2767 pkt = unpack_threadid (pkt, &ref);
2768 mask = mask & ~TAG_THREADID;
2771 if (tag == TAG_EXISTS)
2773 info->active = stub_unpack_int (pkt, length);
2775 mask = mask & ~(TAG_EXISTS);
2778 warning (_("ERROR RMT: 'exists' length too long."));
2784 if (tag == TAG_THREADNAME)
2786 pkt = unpack_string (pkt, &info->shortname[0], length);
2787 mask = mask & ~TAG_THREADNAME;
2790 if (tag == TAG_DISPLAY)
2792 pkt = unpack_string (pkt, &info->display[0], length);
2793 mask = mask & ~TAG_DISPLAY;
2796 if (tag == TAG_MOREDISPLAY)
2798 pkt = unpack_string (pkt, &info->more_display[0], length);
2799 mask = mask & ~TAG_MOREDISPLAY;
2802 warning (_("ERROR RMT: unknown thread info tag."));
2803 break; /* Not a tag we know about. */
2809 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
2810 struct gdb_ext_thread_info *info)
2812 struct remote_state *rs = get_remote_state ();
2815 pack_threadinfo_request (rs->buf, fieldset, threadid);
2817 getpkt (&rs->buf, &rs->buf_size, 0);
2819 if (rs->buf[0] == '\0')
2822 result = remote_unpack_thread_info_response (rs->buf + 2,
2827 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2830 pack_threadlist_request (char *pkt, int startflag, int threadcount,
2831 threadref *nextthread)
2833 *pkt++ = 'q'; /* info query packet */
2834 *pkt++ = 'L'; /* Process LIST or threadLIST request */
2835 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
2836 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
2837 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
2842 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2845 parse_threadlist_response (char *pkt, int result_limit,
2846 threadref *original_echo, threadref *resultlist,
2849 struct remote_state *rs = get_remote_state ();
2851 int count, resultcount, done;
2854 /* Assume the 'q' and 'M chars have been stripped. */
2855 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
2856 /* done parse past here */
2857 pkt = unpack_byte (pkt, &count); /* count field */
2858 pkt = unpack_nibble (pkt, &done);
2859 /* The first threadid is the argument threadid. */
2860 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
2861 while ((count-- > 0) && (pkt < limit))
2863 pkt = unpack_threadid (pkt, resultlist++);
2864 if (resultcount++ >= result_limit)
2872 /* Fetch the next batch of threads from the remote. Returns -1 if the
2873 qL packet is not supported, 0 on error and 1 on success. */
2876 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
2877 int *done, int *result_count, threadref *threadlist)
2879 struct remote_state *rs = get_remote_state ();
2882 /* Trancate result limit to be smaller than the packet size. */
2883 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10)
2884 >= get_remote_packet_size ())
2885 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
2887 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
2889 getpkt (&rs->buf, &rs->buf_size, 0);
2890 if (*rs->buf == '\0')
2892 /* Packet not supported. */
2897 parse_threadlist_response (rs->buf + 2, result_limit,
2898 &rs->echo_nextthread, threadlist, done);
2900 if (!threadmatch (&rs->echo_nextthread, nextthread))
2902 /* FIXME: This is a good reason to drop the packet. */
2903 /* Possably, there is a duplicate response. */
2905 retransmit immediatly - race conditions
2906 retransmit after timeout - yes
2908 wait for packet, then exit
2910 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2911 return 0; /* I choose simply exiting. */
2913 if (*result_count <= 0)
2917 warning (_("RMT ERROR : failed to get remote thread list."));
2920 return result; /* break; */
2922 if (*result_count > result_limit)
2925 warning (_("RMT ERROR: threadlist response longer than requested."));
2931 /* Fetch the list of remote threads, with the qL packet, and call
2932 STEPFUNCTION for each thread found. Stops iterating and returns 1
2933 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2934 STEPFUNCTION returns false. If the packet is not supported,
2938 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
2941 struct remote_state *rs = get_remote_state ();
2942 int done, i, result_count;
2950 if (loopcount++ > looplimit)
2953 warning (_("Remote fetch threadlist -infinite loop-."));
2956 result = remote_get_threadlist (startflag, &rs->nextthread,
2957 MAXTHREADLISTRESULTS,
2958 &done, &result_count,
2959 rs->resultthreadlist);
2962 /* Clear for later iterations. */
2964 /* Setup to resume next batch of thread references, set nextthread. */
2965 if (result_count >= 1)
2966 copy_threadref (&rs->nextthread,
2967 &rs->resultthreadlist[result_count - 1]);
2969 while (result_count--)
2971 if (!(*stepfunction) (&rs->resultthreadlist[i++], context))
2981 /* A thread found on the remote target. */
2983 typedef struct thread_item
2985 /* The thread's PTID. */
2988 /* The thread's extra info. May be NULL. */
2991 /* The thread's name. May be NULL. */
2994 /* The core the thread was running on. -1 if not known. */
2997 DEF_VEC_O(thread_item_t);
2999 /* Context passed around to the various methods listing remote
3000 threads. As new threads are found, they're added to the ITEMS
3003 struct threads_listing_context
3005 /* The threads found on the remote target. */
3006 VEC (thread_item_t) *items;
3009 /* Discard the contents of the constructed thread listing context. */
3012 clear_threads_listing_context (void *p)
3014 struct threads_listing_context *context
3015 = (struct threads_listing_context *) p;
3017 struct thread_item *item;
3019 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
3021 xfree (item->extra);
3025 VEC_free (thread_item_t, context->items);
3028 /* Remove the thread specified as the related_pid field of WS
3029 from the CONTEXT list. */
3032 threads_listing_context_remove (struct target_waitstatus *ws,
3033 struct threads_listing_context *context)
3035 struct thread_item *item;
3037 ptid_t child_ptid = ws->value.related_pid;
3039 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
3041 if (ptid_equal (item->ptid, child_ptid))
3043 VEC_ordered_remove (thread_item_t, context->items, i);
3050 remote_newthread_step (threadref *ref, void *data)
3052 struct threads_listing_context *context
3053 = (struct threads_listing_context *) data;
3054 struct thread_item item;
3055 int pid = ptid_get_pid (inferior_ptid);
3057 item.ptid = ptid_build (pid, threadref_to_int (ref), 0);
3062 VEC_safe_push (thread_item_t, context->items, &item);
3064 return 1; /* continue iterator */
3067 #define CRAZY_MAX_THREADS 1000
3070 remote_current_thread (ptid_t oldpid)
3072 struct remote_state *rs = get_remote_state ();
3075 getpkt (&rs->buf, &rs->buf_size, 0);
3076 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
3081 result = read_ptid (&rs->buf[2], &obuf);
3082 if (*obuf != '\0' && remote_debug)
3083 fprintf_unfiltered (gdb_stdlog,
3084 "warning: garbage in qC reply\n");
3092 /* List remote threads using the deprecated qL packet. */
3095 remote_get_threads_with_ql (struct target_ops *ops,
3096 struct threads_listing_context *context)
3098 if (remote_threadlist_iterator (remote_newthread_step, context,
3099 CRAZY_MAX_THREADS) >= 0)
3105 #if defined(HAVE_LIBEXPAT)
3108 start_thread (struct gdb_xml_parser *parser,
3109 const struct gdb_xml_element *element,
3110 void *user_data, VEC(gdb_xml_value_s) *attributes)
3112 struct threads_listing_context *data
3113 = (struct threads_listing_context *) user_data;
3115 struct thread_item item;
3117 struct gdb_xml_value *attr;
3119 id = (char *) xml_find_attribute (attributes, "id")->value;
3120 item.ptid = read_ptid (id, NULL);
3122 attr = xml_find_attribute (attributes, "core");
3124 item.core = *(ULONGEST *) attr->value;
3128 attr = xml_find_attribute (attributes, "name");
3129 item.name = attr != NULL ? xstrdup ((const char *) attr->value) : NULL;
3133 VEC_safe_push (thread_item_t, data->items, &item);
3137 end_thread (struct gdb_xml_parser *parser,
3138 const struct gdb_xml_element *element,
3139 void *user_data, const char *body_text)
3141 struct threads_listing_context *data
3142 = (struct threads_listing_context *) user_data;
3144 if (body_text && *body_text)
3145 VEC_last (thread_item_t, data->items)->extra = xstrdup (body_text);
3148 const struct gdb_xml_attribute thread_attributes[] = {
3149 { "id", GDB_XML_AF_NONE, NULL, NULL },
3150 { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
3151 { "name", GDB_XML_AF_OPTIONAL, NULL, NULL },
3152 { NULL, GDB_XML_AF_NONE, NULL, NULL }
3155 const struct gdb_xml_element thread_children[] = {
3156 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3159 const struct gdb_xml_element threads_children[] = {
3160 { "thread", thread_attributes, thread_children,
3161 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
3162 start_thread, end_thread },
3163 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3166 const struct gdb_xml_element threads_elements[] = {
3167 { "threads", NULL, threads_children,
3168 GDB_XML_EF_NONE, NULL, NULL },
3169 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3174 /* List remote threads using qXfer:threads:read. */
3177 remote_get_threads_with_qxfer (struct target_ops *ops,
3178 struct threads_listing_context *context)
3180 #if defined(HAVE_LIBEXPAT)
3181 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3183 char *xml = target_read_stralloc (ops, TARGET_OBJECT_THREADS, NULL);
3184 struct cleanup *back_to = make_cleanup (xfree, xml);
3186 if (xml != NULL && *xml != '\0')
3188 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3189 threads_elements, xml, context);
3192 do_cleanups (back_to);
3200 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3203 remote_get_threads_with_qthreadinfo (struct target_ops *ops,
3204 struct threads_listing_context *context)
3206 struct remote_state *rs = get_remote_state ();
3208 if (rs->use_threadinfo_query)
3212 putpkt ("qfThreadInfo");
3213 getpkt (&rs->buf, &rs->buf_size, 0);
3215 if (bufp[0] != '\0') /* q packet recognized */
3217 while (*bufp++ == 'm') /* reply contains one or more TID */
3221 struct thread_item item;
3223 item.ptid = read_ptid (bufp, &bufp);
3228 VEC_safe_push (thread_item_t, context->items, &item);
3230 while (*bufp++ == ','); /* comma-separated list */
3231 putpkt ("qsThreadInfo");
3232 getpkt (&rs->buf, &rs->buf_size, 0);
3239 /* Packet not recognized. */
3240 rs->use_threadinfo_query = 0;
3247 /* Implement the to_update_thread_list function for the remote
3251 remote_update_thread_list (struct target_ops *ops)
3253 struct threads_listing_context context;
3254 struct cleanup *old_chain;
3257 context.items = NULL;
3258 old_chain = make_cleanup (clear_threads_listing_context, &context);
3260 /* We have a few different mechanisms to fetch the thread list. Try
3261 them all, starting with the most preferred one first, falling
3262 back to older methods. */
3263 if (remote_get_threads_with_qxfer (ops, &context)
3264 || remote_get_threads_with_qthreadinfo (ops, &context)
3265 || remote_get_threads_with_ql (ops, &context))
3268 struct thread_item *item;
3269 struct thread_info *tp, *tmp;
3273 if (VEC_empty (thread_item_t, context.items)
3274 && remote_thread_always_alive (ops, inferior_ptid))
3276 /* Some targets don't really support threads, but still
3277 reply an (empty) thread list in response to the thread
3278 listing packets, instead of replying "packet not
3279 supported". Exit early so we don't delete the main
3281 do_cleanups (old_chain);
3285 /* CONTEXT now holds the current thread list on the remote
3286 target end. Delete GDB-side threads no longer found on the
3288 ALL_THREADS_SAFE (tp, tmp)
3291 VEC_iterate (thread_item_t, context.items, i, item);
3294 if (ptid_equal (item->ptid, tp->ptid))
3298 if (i == VEC_length (thread_item_t, context.items))
3301 delete_thread (tp->ptid);
3305 /* Remove any unreported fork child threads from CONTEXT so
3306 that we don't interfere with follow fork, which is where
3307 creation of such threads is handled. */
3308 remove_new_fork_children (&context);
3310 /* And now add threads we don't know about yet to our list. */
3312 VEC_iterate (thread_item_t, context.items, i, item);
3315 if (!ptid_equal (item->ptid, null_ptid))
3317 struct private_thread_info *info;
3318 /* In non-stop mode, we assume new found threads are
3319 executing until proven otherwise with a stop reply.
3320 In all-stop, we can only get here if all threads are
3322 int executing = target_is_non_stop_p () ? 1 : 0;
3324 remote_notice_new_inferior (item->ptid, executing);
3326 info = get_private_info_ptid (item->ptid);
3327 info->core = item->core;
3328 info->extra = item->extra;
3330 info->name = item->name;
3338 /* If no thread listing method is supported, then query whether
3339 each known thread is alive, one by one, with the T packet.
3340 If the target doesn't support threads at all, then this is a
3341 no-op. See remote_thread_alive. */
3345 do_cleanups (old_chain);
3349 * Collect a descriptive string about the given thread.
3350 * The target may say anything it wants to about the thread
3351 * (typically info about its blocked / runnable state, name, etc.).
3352 * This string will appear in the info threads display.
3354 * Optional: targets are not required to implement this function.
3358 remote_threads_extra_info (struct target_ops *self, struct thread_info *tp)
3360 struct remote_state *rs = get_remote_state ();
3364 struct gdb_ext_thread_info threadinfo;
3365 static char display_buf[100]; /* arbitrary... */
3366 int n = 0; /* position in display_buf */
3368 if (rs->remote_desc == 0) /* paranoia */
3369 internal_error (__FILE__, __LINE__,
3370 _("remote_threads_extra_info"));
3372 if (ptid_equal (tp->ptid, magic_null_ptid)
3373 || (ptid_get_pid (tp->ptid) != 0 && ptid_get_lwp (tp->ptid) == 0))
3374 /* This is the main thread which was added by GDB. The remote
3375 server doesn't know about it. */
3378 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3380 struct thread_info *info = find_thread_ptid (tp->ptid);
3382 if (info && info->priv)
3383 return info->priv->extra;
3388 if (rs->use_threadextra_query)
3391 char *endb = rs->buf + get_remote_packet_size ();
3393 xsnprintf (b, endb - b, "qThreadExtraInfo,");
3395 write_ptid (b, endb, tp->ptid);
3398 getpkt (&rs->buf, &rs->buf_size, 0);
3399 if (rs->buf[0] != 0)
3401 n = std::min (strlen (rs->buf) / 2, sizeof (display_buf));
3402 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
3403 display_buf [result] = '\0';
3408 /* If the above query fails, fall back to the old method. */
3409 rs->use_threadextra_query = 0;
3410 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
3411 | TAG_MOREDISPLAY | TAG_DISPLAY;
3412 int_to_threadref (&id, ptid_get_lwp (tp->ptid));
3413 if (remote_get_threadinfo (&id, set, &threadinfo))
3414 if (threadinfo.active)
3416 if (*threadinfo.shortname)
3417 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
3418 " Name: %s,", threadinfo.shortname);
3419 if (*threadinfo.display)
3420 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
3421 " State: %s,", threadinfo.display);
3422 if (*threadinfo.more_display)
3423 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
3424 " Priority: %s", threadinfo.more_display);
3428 /* For purely cosmetic reasons, clear up trailing commas. */
3429 if (',' == display_buf[n-1])
3430 display_buf[n-1] = ' ';
3439 remote_static_tracepoint_marker_at (struct target_ops *self, CORE_ADDR addr,
3440 struct static_tracepoint_marker *marker)
3442 struct remote_state *rs = get_remote_state ();
3445 xsnprintf (p, get_remote_packet_size (), "qTSTMat:");
3447 p += hexnumstr (p, addr);
3449 getpkt (&rs->buf, &rs->buf_size, 0);
3453 error (_("Remote failure reply: %s"), p);
3457 parse_static_tracepoint_marker_definition (p, &p, marker);
3464 static VEC(static_tracepoint_marker_p) *
3465 remote_static_tracepoint_markers_by_strid (struct target_ops *self,
3468 struct remote_state *rs = get_remote_state ();
3469 VEC(static_tracepoint_marker_p) *markers = NULL;
3470 struct static_tracepoint_marker *marker = NULL;
3471 struct cleanup *old_chain;
3474 /* Ask for a first packet of static tracepoint marker
3477 getpkt (&rs->buf, &rs->buf_size, 0);
3480 error (_("Remote failure reply: %s"), p);
3482 old_chain = make_cleanup (free_current_marker, &marker);
3487 marker = XCNEW (struct static_tracepoint_marker);
3491 parse_static_tracepoint_marker_definition (p, &p, marker);
3493 if (strid == NULL || strcmp (strid, marker->str_id) == 0)
3495 VEC_safe_push (static_tracepoint_marker_p,
3501 release_static_tracepoint_marker (marker);
3502 memset (marker, 0, sizeof (*marker));
3505 while (*p++ == ','); /* comma-separated list */
3506 /* Ask for another packet of static tracepoint definition. */
3508 getpkt (&rs->buf, &rs->buf_size, 0);
3512 do_cleanups (old_chain);
3517 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3520 remote_get_ada_task_ptid (struct target_ops *self, long lwp, long thread)
3522 return ptid_build (ptid_get_pid (inferior_ptid), lwp, 0);
3526 /* Restart the remote side; this is an extended protocol operation. */
3529 extended_remote_restart (void)
3531 struct remote_state *rs = get_remote_state ();
3533 /* Send the restart command; for reasons I don't understand the
3534 remote side really expects a number after the "R". */
3535 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
3538 remote_fileio_reset ();
3541 /* Clean up connection to a remote debugger. */
3544 remote_close (struct target_ops *self)
3546 struct remote_state *rs = get_remote_state ();
3548 if (rs->remote_desc == NULL)
3549 return; /* already closed */
3551 /* Make sure we leave stdin registered in the event loop. */
3552 remote_terminal_ours (self);
3554 serial_close (rs->remote_desc);
3555 rs->remote_desc = NULL;
3557 /* We don't have a connection to the remote stub anymore. Get rid
3558 of all the inferiors and their threads we were controlling.
3559 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3560 will be unable to find the thread corresponding to (pid, 0, 0). */
3561 inferior_ptid = null_ptid;
3562 discard_all_inferiors ();
3564 /* We are closing the remote target, so we should discard
3565 everything of this target. */
3566 discard_pending_stop_replies_in_queue (rs);
3568 if (remote_async_inferior_event_token)
3569 delete_async_event_handler (&remote_async_inferior_event_token);
3571 remote_notif_state_xfree (rs->notif_state);
3573 trace_reset_local_state ();
3576 /* Query the remote side for the text, data and bss offsets. */
3581 struct remote_state *rs = get_remote_state ();
3584 int lose, num_segments = 0, do_sections, do_segments;
3585 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
3586 struct section_offsets *offs;
3587 struct symfile_segment_data *data;
3589 if (symfile_objfile == NULL)
3592 putpkt ("qOffsets");
3593 getpkt (&rs->buf, &rs->buf_size, 0);
3596 if (buf[0] == '\000')
3597 return; /* Return silently. Stub doesn't support
3601 warning (_("Remote failure reply: %s"), buf);
3605 /* Pick up each field in turn. This used to be done with scanf, but
3606 scanf will make trouble if CORE_ADDR size doesn't match
3607 conversion directives correctly. The following code will work
3608 with any size of CORE_ADDR. */
3609 text_addr = data_addr = bss_addr = 0;
3613 if (startswith (ptr, "Text="))
3616 /* Don't use strtol, could lose on big values. */
3617 while (*ptr && *ptr != ';')
3618 text_addr = (text_addr << 4) + fromhex (*ptr++);
3620 if (startswith (ptr, ";Data="))
3623 while (*ptr && *ptr != ';')
3624 data_addr = (data_addr << 4) + fromhex (*ptr++);
3629 if (!lose && startswith (ptr, ";Bss="))
3632 while (*ptr && *ptr != ';')
3633 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
3635 if (bss_addr != data_addr)
3636 warning (_("Target reported unsupported offsets: %s"), buf);
3641 else if (startswith (ptr, "TextSeg="))
3644 /* Don't use strtol, could lose on big values. */
3645 while (*ptr && *ptr != ';')
3646 text_addr = (text_addr << 4) + fromhex (*ptr++);
3649 if (startswith (ptr, ";DataSeg="))
3652 while (*ptr && *ptr != ';')
3653 data_addr = (data_addr << 4) + fromhex (*ptr++);
3661 error (_("Malformed response to offset query, %s"), buf);
3662 else if (*ptr != '\0')
3663 warning (_("Target reported unsupported offsets: %s"), buf);
3665 offs = ((struct section_offsets *)
3666 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
3667 memcpy (offs, symfile_objfile->section_offsets,
3668 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
3670 data = get_symfile_segment_data (symfile_objfile->obfd);
3671 do_segments = (data != NULL);
3672 do_sections = num_segments == 0;
3674 if (num_segments > 0)
3676 segments[0] = text_addr;
3677 segments[1] = data_addr;
3679 /* If we have two segments, we can still try to relocate everything
3680 by assuming that the .text and .data offsets apply to the whole
3681 text and data segments. Convert the offsets given in the packet
3682 to base addresses for symfile_map_offsets_to_segments. */
3683 else if (data && data->num_segments == 2)
3685 segments[0] = data->segment_bases[0] + text_addr;
3686 segments[1] = data->segment_bases[1] + data_addr;
3689 /* If the object file has only one segment, assume that it is text
3690 rather than data; main programs with no writable data are rare,
3691 but programs with no code are useless. Of course the code might
3692 have ended up in the data segment... to detect that we would need
3693 the permissions here. */
3694 else if (data && data->num_segments == 1)
3696 segments[0] = data->segment_bases[0] + text_addr;
3699 /* There's no way to relocate by segment. */
3705 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
3706 offs, num_segments, segments);
3708 if (ret == 0 && !do_sections)
3709 error (_("Can not handle qOffsets TextSeg "
3710 "response with this symbol file"));
3717 free_symfile_segment_data (data);
3721 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
3723 /* This is a temporary kludge to force data and bss to use the
3724 same offsets because that's what nlmconv does now. The real
3725 solution requires changes to the stub and remote.c that I
3726 don't have time to do right now. */
3728 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
3729 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
3732 objfile_relocate (symfile_objfile, offs);
3735 /* Send interrupt_sequence to remote target. */
3737 send_interrupt_sequence (void)
3739 struct remote_state *rs = get_remote_state ();
3741 if (interrupt_sequence_mode == interrupt_sequence_control_c)
3742 remote_serial_write ("\x03", 1);
3743 else if (interrupt_sequence_mode == interrupt_sequence_break)
3744 serial_send_break (rs->remote_desc);
3745 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
3747 serial_send_break (rs->remote_desc);
3748 remote_serial_write ("g", 1);
3751 internal_error (__FILE__, __LINE__,
3752 _("Invalid value for interrupt_sequence_mode: %s."),
3753 interrupt_sequence_mode);
3757 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3758 and extract the PTID. Returns NULL_PTID if not found. */
3761 stop_reply_extract_thread (char *stop_reply)
3763 if (stop_reply[0] == 'T' && strlen (stop_reply) > 3)
3767 /* Txx r:val ; r:val (...) */
3770 /* Look for "register" named "thread". */
3775 p1 = strchr (p, ':');
3779 if (strncmp (p, "thread", p1 - p) == 0)
3780 return read_ptid (++p1, &p);
3782 p1 = strchr (p, ';');
3794 /* Determine the remote side's current thread. If we have a stop
3795 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3796 "thread" register we can extract the current thread from. If not,
3797 ask the remote which is the current thread with qC. The former
3798 method avoids a roundtrip. */
3801 get_current_thread (char *wait_status)
3803 ptid_t ptid = null_ptid;
3805 /* Note we don't use remote_parse_stop_reply as that makes use of
3806 the target architecture, which we haven't yet fully determined at
3808 if (wait_status != NULL)
3809 ptid = stop_reply_extract_thread (wait_status);
3810 if (ptid_equal (ptid, null_ptid))
3811 ptid = remote_current_thread (inferior_ptid);
3816 /* Query the remote target for which is the current thread/process,
3817 add it to our tables, and update INFERIOR_PTID. The caller is
3818 responsible for setting the state such that the remote end is ready
3819 to return the current thread.
3821 This function is called after handling the '?' or 'vRun' packets,
3822 whose response is a stop reply from which we can also try
3823 extracting the thread. If the target doesn't support the explicit
3824 qC query, we infer the current thread from that stop reply, passed
3825 in in WAIT_STATUS, which may be NULL. */
3828 add_current_inferior_and_thread (char *wait_status)
3830 struct remote_state *rs = get_remote_state ();
3834 inferior_ptid = null_ptid;
3836 /* Now, if we have thread information, update inferior_ptid. */
3837 ptid = get_current_thread (wait_status);
3839 if (!ptid_equal (ptid, null_ptid))
3841 if (!remote_multi_process_p (rs))
3844 inferior_ptid = ptid;
3848 /* Without this, some commands which require an active target
3849 (such as kill) won't work. This variable serves (at least)
3850 double duty as both the pid of the target process (if it has
3851 such), and as a flag indicating that a target is active. */
3852 inferior_ptid = magic_null_ptid;
3856 remote_add_inferior (fake_pid_p, ptid_get_pid (inferior_ptid), -1, 1);
3858 /* Add the main thread. */
3859 add_thread_silent (inferior_ptid);
3862 /* Print info about a thread that was found already stopped on
3866 print_one_stopped_thread (struct thread_info *thread)
3868 struct target_waitstatus *ws = &thread->suspend.waitstatus;
3870 switch_to_thread (thread->ptid);
3871 stop_pc = get_frame_pc (get_current_frame ());
3872 set_current_sal_from_frame (get_current_frame ());
3874 thread->suspend.waitstatus_pending_p = 0;
3876 if (ws->kind == TARGET_WAITKIND_STOPPED)
3878 enum gdb_signal sig = ws->value.sig;
3880 if (signal_print_state (sig))
3881 observer_notify_signal_received (sig);
3883 observer_notify_normal_stop (NULL, 1);
3886 /* Process all initial stop replies the remote side sent in response
3887 to the ? packet. These indicate threads that were already stopped
3888 on initial connection. We mark these threads as stopped and print
3889 their current frame before giving the user the prompt. */
3892 process_initial_stop_replies (int from_tty)
3894 int pending_stop_replies = stop_reply_queue_length ();
3895 struct inferior *inf;
3896 struct thread_info *thread;
3897 struct thread_info *selected = NULL;
3898 struct thread_info *lowest_stopped = NULL;
3899 struct thread_info *first = NULL;
3901 /* Consume the initial pending events. */
3902 while (pending_stop_replies-- > 0)
3904 ptid_t waiton_ptid = minus_one_ptid;
3906 struct target_waitstatus ws;
3907 int ignore_event = 0;
3908 struct thread_info *thread;
3910 memset (&ws, 0, sizeof (ws));
3911 event_ptid = target_wait (waiton_ptid, &ws, TARGET_WNOHANG);
3913 print_target_wait_results (waiton_ptid, event_ptid, &ws);
3917 case TARGET_WAITKIND_IGNORE:
3918 case TARGET_WAITKIND_NO_RESUMED:
3919 case TARGET_WAITKIND_SIGNALLED:
3920 case TARGET_WAITKIND_EXITED:
3921 /* We shouldn't see these, but if we do, just ignore. */
3923 fprintf_unfiltered (gdb_stdlog, "remote: event ignored\n");
3927 case TARGET_WAITKIND_EXECD:
3928 xfree (ws.value.execd_pathname);
3937 thread = find_thread_ptid (event_ptid);
3939 if (ws.kind == TARGET_WAITKIND_STOPPED)
3941 enum gdb_signal sig = ws.value.sig;
3943 /* Stubs traditionally report SIGTRAP as initial signal,
3944 instead of signal 0. Suppress it. */
3945 if (sig == GDB_SIGNAL_TRAP)
3947 thread->suspend.stop_signal = sig;
3951 thread->suspend.waitstatus = ws;
3953 if (ws.kind != TARGET_WAITKIND_STOPPED
3954 || ws.value.sig != GDB_SIGNAL_0)
3955 thread->suspend.waitstatus_pending_p = 1;
3957 set_executing (event_ptid, 0);
3958 set_running (event_ptid, 0);
3959 thread->priv->vcont_resumed = 0;
3962 /* "Notice" the new inferiors before anything related to
3963 registers/memory. */
3969 inf->needs_setup = 1;
3973 thread = any_live_thread_of_process (inf->pid);
3974 notice_new_inferior (thread->ptid,
3975 thread->state == THREAD_RUNNING,
3980 /* If all-stop on top of non-stop, pause all threads. Note this
3981 records the threads' stop pc, so must be done after "noticing"
3985 stop_all_threads ();
3987 /* If all threads of an inferior were already stopped, we
3988 haven't setup the inferior yet. */
3994 if (inf->needs_setup)
3996 thread = any_live_thread_of_process (inf->pid);
3997 switch_to_thread_no_regs (thread);
4003 /* Now go over all threads that are stopped, and print their current
4004 frame. If all-stop, then if there's a signalled thread, pick
4006 ALL_NON_EXITED_THREADS (thread)
4012 set_running (thread->ptid, 0);
4013 else if (thread->state != THREAD_STOPPED)
4016 if (selected == NULL
4017 && thread->suspend.waitstatus_pending_p)
4020 if (lowest_stopped == NULL
4021 || thread->inf->num < lowest_stopped->inf->num
4022 || thread->per_inf_num < lowest_stopped->per_inf_num)
4023 lowest_stopped = thread;
4026 print_one_stopped_thread (thread);
4029 /* In all-stop, we only print the status of one thread, and leave
4030 others with their status pending. */
4035 thread = lowest_stopped;
4039 print_one_stopped_thread (thread);
4042 /* For "info program". */
4043 thread = inferior_thread ();
4044 if (thread->state == THREAD_STOPPED)
4045 set_last_target_status (inferior_ptid, thread->suspend.waitstatus);
4048 /* Start the remote connection and sync state. */
4051 remote_start_remote (int from_tty, struct target_ops *target, int extended_p)
4053 struct remote_state *rs = get_remote_state ();
4054 struct packet_config *noack_config;
4055 char *wait_status = NULL;
4057 /* Signal other parts that we're going through the initial setup,
4058 and so things may not be stable yet. E.g., we don't try to
4059 install tracepoints until we've relocated symbols. Also, a
4060 Ctrl-C before we're connected and synced up can't interrupt the
4061 target. Instead, it offers to drop the (potentially wedged)
4063 rs->starting_up = 1;
4067 if (interrupt_on_connect)
4068 send_interrupt_sequence ();
4070 /* Ack any packet which the remote side has already sent. */
4071 remote_serial_write ("+", 1);
4073 /* The first packet we send to the target is the optional "supported
4074 packets" request. If the target can answer this, it will tell us
4075 which later probes to skip. */
4076 remote_query_supported ();
4078 /* If the stub wants to get a QAllow, compose one and send it. */
4079 if (packet_support (PACKET_QAllow) != PACKET_DISABLE)
4080 remote_set_permissions (target);
4082 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4083 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4084 as a reply to known packet. For packet "vFile:setfs:" it is an
4085 invalid reply and GDB would return error in
4086 remote_hostio_set_filesystem, making remote files access impossible.
4087 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4088 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4090 const char v_mustreplyempty[] = "vMustReplyEmpty";
4092 putpkt (v_mustreplyempty);
4093 getpkt (&rs->buf, &rs->buf_size, 0);
4094 if (strcmp (rs->buf, "OK") == 0)
4095 remote_protocol_packets[PACKET_vFile_setfs].support = PACKET_DISABLE;
4096 else if (strcmp (rs->buf, "") != 0)
4097 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty,
4101 /* Next, we possibly activate noack mode.
4103 If the QStartNoAckMode packet configuration is set to AUTO,
4104 enable noack mode if the stub reported a wish for it with
4107 If set to TRUE, then enable noack mode even if the stub didn't
4108 report it in qSupported. If the stub doesn't reply OK, the
4109 session ends with an error.
4111 If FALSE, then don't activate noack mode, regardless of what the
4112 stub claimed should be the default with qSupported. */
4114 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
4115 if (packet_config_support (noack_config) != PACKET_DISABLE)
4117 putpkt ("QStartNoAckMode");
4118 getpkt (&rs->buf, &rs->buf_size, 0);
4119 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
4125 /* Tell the remote that we are using the extended protocol. */
4127 getpkt (&rs->buf, &rs->buf_size, 0);
4130 /* Let the target know which signals it is allowed to pass down to
4132 update_signals_program_target ();
4134 /* Next, if the target can specify a description, read it. We do
4135 this before anything involving memory or registers. */
4136 target_find_description ();
4138 /* Next, now that we know something about the target, update the
4139 address spaces in the program spaces. */
4140 update_address_spaces ();
4142 /* On OSs where the list of libraries is global to all
4143 processes, we fetch them early. */
4144 if (gdbarch_has_global_solist (target_gdbarch ()))
4145 solib_add (NULL, from_tty, auto_solib_add);
4147 if (target_is_non_stop_p ())
4149 if (packet_support (PACKET_QNonStop) != PACKET_ENABLE)
4150 error (_("Non-stop mode requested, but remote "
4151 "does not support non-stop"));
4153 putpkt ("QNonStop:1");
4154 getpkt (&rs->buf, &rs->buf_size, 0);
4156 if (strcmp (rs->buf, "OK") != 0)
4157 error (_("Remote refused setting non-stop mode with: %s"), rs->buf);
4159 /* Find about threads and processes the stub is already
4160 controlling. We default to adding them in the running state.
4161 The '?' query below will then tell us about which threads are
4163 remote_update_thread_list (target);
4165 else if (packet_support (PACKET_QNonStop) == PACKET_ENABLE)
4167 /* Don't assume that the stub can operate in all-stop mode.
4168 Request it explicitly. */
4169 putpkt ("QNonStop:0");
4170 getpkt (&rs->buf, &rs->buf_size, 0);
4172 if (strcmp (rs->buf, "OK") != 0)
4173 error (_("Remote refused setting all-stop mode with: %s"), rs->buf);
4176 /* Upload TSVs regardless of whether the target is running or not. The
4177 remote stub, such as GDBserver, may have some predefined or builtin
4178 TSVs, even if the target is not running. */
4179 if (remote_get_trace_status (target, current_trace_status ()) != -1)
4181 struct uploaded_tsv *uploaded_tsvs = NULL;
4183 remote_upload_trace_state_variables (target, &uploaded_tsvs);
4184 merge_uploaded_trace_state_variables (&uploaded_tsvs);
4187 /* Check whether the target is running now. */
4189 getpkt (&rs->buf, &rs->buf_size, 0);
4191 if (!target_is_non_stop_p ())
4193 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
4196 error (_("The target is not running (try extended-remote?)"));
4198 /* We're connected, but not running. Drop out before we
4199 call start_remote. */
4200 rs->starting_up = 0;
4205 /* Save the reply for later. */
4206 wait_status = (char *) alloca (strlen (rs->buf) + 1);
4207 strcpy (wait_status, rs->buf);
4210 /* Fetch thread list. */
4211 target_update_thread_list ();
4213 /* Let the stub know that we want it to return the thread. */
4214 set_continue_thread (minus_one_ptid);
4216 if (thread_count () == 0)
4218 /* Target has no concept of threads at all. GDB treats
4219 non-threaded target as single-threaded; add a main
4221 add_current_inferior_and_thread (wait_status);
4225 /* We have thread information; select the thread the target
4226 says should be current. If we're reconnecting to a
4227 multi-threaded program, this will ideally be the thread
4228 that last reported an event before GDB disconnected. */
4229 inferior_ptid = get_current_thread (wait_status);
4230 if (ptid_equal (inferior_ptid, null_ptid))
4232 /* Odd... The target was able to list threads, but not
4233 tell us which thread was current (no "thread"
4234 register in T stop reply?). Just pick the first
4235 thread in the thread list then. */
4238 fprintf_unfiltered (gdb_stdlog,
4239 "warning: couldn't determine remote "
4240 "current thread; picking first in list.\n");
4242 inferior_ptid = thread_list->ptid;
4246 /* init_wait_for_inferior should be called before get_offsets in order
4247 to manage `inserted' flag in bp loc in a correct state.
4248 breakpoint_init_inferior, called from init_wait_for_inferior, set
4249 `inserted' flag to 0, while before breakpoint_re_set, called from
4250 start_remote, set `inserted' flag to 1. In the initialization of
4251 inferior, breakpoint_init_inferior should be called first, and then
4252 breakpoint_re_set can be called. If this order is broken, state of
4253 `inserted' flag is wrong, and cause some problems on breakpoint
4255 init_wait_for_inferior ();
4257 get_offsets (); /* Get text, data & bss offsets. */
4259 /* If we could not find a description using qXfer, and we know
4260 how to do it some other way, try again. This is not
4261 supported for non-stop; it could be, but it is tricky if
4262 there are no stopped threads when we connect. */
4263 if (remote_read_description_p (target)
4264 && gdbarch_target_desc (target_gdbarch ()) == NULL)
4266 target_clear_description ();
4267 target_find_description ();
4270 /* Use the previously fetched status. */
4271 gdb_assert (wait_status != NULL);
4272 strcpy (rs->buf, wait_status);
4273 rs->cached_wait_status = 1;
4275 start_remote (from_tty); /* Initialize gdb process mechanisms. */
4279 /* Clear WFI global state. Do this before finding about new
4280 threads and inferiors, and setting the current inferior.
4281 Otherwise we would clear the proceed status of the current
4282 inferior when we want its stop_soon state to be preserved
4283 (see notice_new_inferior). */
4284 init_wait_for_inferior ();
4286 /* In non-stop, we will either get an "OK", meaning that there
4287 are no stopped threads at this time; or, a regular stop
4288 reply. In the latter case, there may be more than one thread
4289 stopped --- we pull them all out using the vStopped
4291 if (strcmp (rs->buf, "OK") != 0)
4293 struct notif_client *notif = ¬if_client_stop;
4295 /* remote_notif_get_pending_replies acks this one, and gets
4297 rs->notif_state->pending_event[notif_client_stop.id]
4298 = remote_notif_parse (notif, rs->buf);
4299 remote_notif_get_pending_events (notif);
4302 if (thread_count () == 0)
4305 error (_("The target is not running (try extended-remote?)"));
4307 /* We're connected, but not running. Drop out before we
4308 call start_remote. */
4309 rs->starting_up = 0;
4313 /* In non-stop mode, any cached wait status will be stored in
4314 the stop reply queue. */
4315 gdb_assert (wait_status == NULL);
4317 /* Report all signals during attach/startup. */
4318 remote_pass_signals (target, 0, NULL);
4320 /* If there are already stopped threads, mark them stopped and
4321 report their stops before giving the prompt to the user. */
4322 process_initial_stop_replies (from_tty);
4324 if (target_can_async_p ())
4328 /* If we connected to a live target, do some additional setup. */
4329 if (target_has_execution)
4331 if (symfile_objfile) /* No use without a symbol-file. */
4332 remote_check_symbols ();
4335 /* Possibly the target has been engaged in a trace run started
4336 previously; find out where things are at. */
4337 if (remote_get_trace_status (target, current_trace_status ()) != -1)
4339 struct uploaded_tp *uploaded_tps = NULL;
4341 if (current_trace_status ()->running)
4342 printf_filtered (_("Trace is already running on the target.\n"));
4344 remote_upload_tracepoints (target, &uploaded_tps);
4346 merge_uploaded_tracepoints (&uploaded_tps);
4349 /* Possibly the target has been engaged in a btrace record started
4350 previously; find out where things are at. */
4351 remote_btrace_maybe_reopen ();
4353 /* The thread and inferior lists are now synchronized with the
4354 target, our symbols have been relocated, and we're merged the
4355 target's tracepoints with ours. We're done with basic start
4357 rs->starting_up = 0;
4359 /* Maybe breakpoints are global and need to be inserted now. */
4360 if (breakpoints_should_be_inserted_now ())
4361 insert_breakpoints ();
4364 /* Open a connection to a remote debugger.
4365 NAME is the filename used for communication. */
4368 remote_open (const char *name, int from_tty)
4370 remote_open_1 (name, from_tty, &remote_ops, 0);
4373 /* Open a connection to a remote debugger using the extended
4374 remote gdb protocol. NAME is the filename used for communication. */
4377 extended_remote_open (const char *name, int from_tty)
4379 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
4382 /* Reset all packets back to "unknown support". Called when opening a
4383 new connection to a remote target. */
4386 reset_all_packet_configs_support (void)
4390 for (i = 0; i < PACKET_MAX; i++)
4391 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
4394 /* Initialize all packet configs. */
4397 init_all_packet_configs (void)
4401 for (i = 0; i < PACKET_MAX; i++)
4403 remote_protocol_packets[i].detect = AUTO_BOOLEAN_AUTO;
4404 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
4408 /* Symbol look-up. */
4411 remote_check_symbols (void)
4413 struct remote_state *rs = get_remote_state ();
4414 char *msg, *reply, *tmp;
4417 struct cleanup *old_chain;
4419 /* The remote side has no concept of inferiors that aren't running
4420 yet, it only knows about running processes. If we're connected
4421 but our current inferior is not running, we should not invite the
4422 remote target to request symbol lookups related to its
4423 (unrelated) current process. */
4424 if (!target_has_execution)
4427 if (packet_support (PACKET_qSymbol) == PACKET_DISABLE)
4430 /* Make sure the remote is pointing at the right process. Note
4431 there's no way to select "no process". */
4432 set_general_process ();
4434 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4435 because we need both at the same time. */
4436 msg = (char *) xmalloc (get_remote_packet_size ());
4437 old_chain = make_cleanup (xfree, msg);
4438 reply = (char *) xmalloc (get_remote_packet_size ());
4439 make_cleanup (free_current_contents, &reply);
4440 reply_size = get_remote_packet_size ();
4442 /* Invite target to request symbol lookups. */
4444 putpkt ("qSymbol::");
4445 getpkt (&reply, &reply_size, 0);
4446 packet_ok (reply, &remote_protocol_packets[PACKET_qSymbol]);
4448 while (startswith (reply, "qSymbol:"))
4450 struct bound_minimal_symbol sym;
4453 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
4455 sym = lookup_minimal_symbol (msg, NULL, NULL);
4456 if (sym.minsym == NULL)
4457 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
4460 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
4461 CORE_ADDR sym_addr = BMSYMBOL_VALUE_ADDRESS (sym);
4463 /* If this is a function address, return the start of code
4464 instead of any data function descriptor. */
4465 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4469 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
4470 phex_nz (sym_addr, addr_size), &reply[8]);
4474 getpkt (&reply, &reply_size, 0);
4477 do_cleanups (old_chain);
4480 static struct serial *
4481 remote_serial_open (const char *name)
4483 static int udp_warning = 0;
4485 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4486 of in ser-tcp.c, because it is the remote protocol assuming that the
4487 serial connection is reliable and not the serial connection promising
4489 if (!udp_warning && startswith (name, "udp:"))
4491 warning (_("The remote protocol may be unreliable over UDP.\n"
4492 "Some events may be lost, rendering further debugging "
4497 return serial_open (name);
4500 /* Inform the target of our permission settings. The permission flags
4501 work without this, but if the target knows the settings, it can do
4502 a couple things. First, it can add its own check, to catch cases
4503 that somehow manage to get by the permissions checks in target
4504 methods. Second, if the target is wired to disallow particular
4505 settings (for instance, a system in the field that is not set up to
4506 be able to stop at a breakpoint), it can object to any unavailable
4510 remote_set_permissions (struct target_ops *self)
4512 struct remote_state *rs = get_remote_state ();
4514 xsnprintf (rs->buf, get_remote_packet_size (), "QAllow:"
4515 "WriteReg:%x;WriteMem:%x;"
4516 "InsertBreak:%x;InsertTrace:%x;"
4517 "InsertFastTrace:%x;Stop:%x",
4518 may_write_registers, may_write_memory,
4519 may_insert_breakpoints, may_insert_tracepoints,
4520 may_insert_fast_tracepoints, may_stop);
4522 getpkt (&rs->buf, &rs->buf_size, 0);
4524 /* If the target didn't like the packet, warn the user. Do not try
4525 to undo the user's settings, that would just be maddening. */
4526 if (strcmp (rs->buf, "OK") != 0)
4527 warning (_("Remote refused setting permissions with: %s"), rs->buf);
4530 /* This type describes each known response to the qSupported
4532 struct protocol_feature
4534 /* The name of this protocol feature. */
4537 /* The default for this protocol feature. */
4538 enum packet_support default_support;
4540 /* The function to call when this feature is reported, or after
4541 qSupported processing if the feature is not supported.
4542 The first argument points to this structure. The second
4543 argument indicates whether the packet requested support be
4544 enabled, disabled, or probed (or the default, if this function
4545 is being called at the end of processing and this feature was
4546 not reported). The third argument may be NULL; if not NULL, it
4547 is a NUL-terminated string taken from the packet following
4548 this feature's name and an equals sign. */
4549 void (*func) (const struct protocol_feature *, enum packet_support,
4552 /* The corresponding packet for this feature. Only used if
4553 FUNC is remote_supported_packet. */
4558 remote_supported_packet (const struct protocol_feature *feature,
4559 enum packet_support support,
4560 const char *argument)
4564 warning (_("Remote qSupported response supplied an unexpected value for"
4565 " \"%s\"."), feature->name);
4569 remote_protocol_packets[feature->packet].support = support;
4573 remote_packet_size (const struct protocol_feature *feature,
4574 enum packet_support support, const char *value)
4576 struct remote_state *rs = get_remote_state ();
4581 if (support != PACKET_ENABLE)
4584 if (value == NULL || *value == '\0')
4586 warning (_("Remote target reported \"%s\" without a size."),
4592 packet_size = strtol (value, &value_end, 16);
4593 if (errno != 0 || *value_end != '\0' || packet_size < 0)
4595 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4596 feature->name, value);
4600 /* Record the new maximum packet size. */
4601 rs->explicit_packet_size = packet_size;
4604 static const struct protocol_feature remote_protocol_features[] = {
4605 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
4606 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
4607 PACKET_qXfer_auxv },
4608 { "qXfer:exec-file:read", PACKET_DISABLE, remote_supported_packet,
4609 PACKET_qXfer_exec_file },
4610 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
4611 PACKET_qXfer_features },
4612 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
4613 PACKET_qXfer_libraries },
4614 { "qXfer:libraries-svr4:read", PACKET_DISABLE, remote_supported_packet,
4615 PACKET_qXfer_libraries_svr4 },
4616 { "augmented-libraries-svr4-read", PACKET_DISABLE,
4617 remote_supported_packet, PACKET_augmented_libraries_svr4_read_feature },
4618 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
4619 PACKET_qXfer_memory_map },
4620 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
4621 PACKET_qXfer_spu_read },
4622 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
4623 PACKET_qXfer_spu_write },
4624 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
4625 PACKET_qXfer_osdata },
4626 { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet,
4627 PACKET_qXfer_threads },
4628 { "qXfer:traceframe-info:read", PACKET_DISABLE, remote_supported_packet,
4629 PACKET_qXfer_traceframe_info },
4630 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
4631 PACKET_QPassSignals },
4632 { "QCatchSyscalls", PACKET_DISABLE, remote_supported_packet,
4633 PACKET_QCatchSyscalls },
4634 { "QProgramSignals", PACKET_DISABLE, remote_supported_packet,
4635 PACKET_QProgramSignals },
4636 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
4637 PACKET_QStartNoAckMode },
4638 { "multiprocess", PACKET_DISABLE, remote_supported_packet,
4639 PACKET_multiprocess_feature },
4640 { "QNonStop", PACKET_DISABLE, remote_supported_packet, PACKET_QNonStop },
4641 { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
4642 PACKET_qXfer_siginfo_read },
4643 { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
4644 PACKET_qXfer_siginfo_write },
4645 { "ConditionalTracepoints", PACKET_DISABLE, remote_supported_packet,
4646 PACKET_ConditionalTracepoints },
4647 { "ConditionalBreakpoints", PACKET_DISABLE, remote_supported_packet,
4648 PACKET_ConditionalBreakpoints },
4649 { "BreakpointCommands", PACKET_DISABLE, remote_supported_packet,
4650 PACKET_BreakpointCommands },
4651 { "FastTracepoints", PACKET_DISABLE, remote_supported_packet,
4652 PACKET_FastTracepoints },
4653 { "StaticTracepoints", PACKET_DISABLE, remote_supported_packet,
4654 PACKET_StaticTracepoints },
4655 {"InstallInTrace", PACKET_DISABLE, remote_supported_packet,
4656 PACKET_InstallInTrace},
4657 { "DisconnectedTracing", PACKET_DISABLE, remote_supported_packet,
4658 PACKET_DisconnectedTracing_feature },
4659 { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
4661 { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
4663 { "TracepointSource", PACKET_DISABLE, remote_supported_packet,
4664 PACKET_TracepointSource },
4665 { "QAllow", PACKET_DISABLE, remote_supported_packet,
4667 { "EnableDisableTracepoints", PACKET_DISABLE, remote_supported_packet,
4668 PACKET_EnableDisableTracepoints_feature },
4669 { "qXfer:fdpic:read", PACKET_DISABLE, remote_supported_packet,
4670 PACKET_qXfer_fdpic },
4671 { "qXfer:uib:read", PACKET_DISABLE, remote_supported_packet,
4673 { "QDisableRandomization", PACKET_DISABLE, remote_supported_packet,
4674 PACKET_QDisableRandomization },
4675 { "QAgent", PACKET_DISABLE, remote_supported_packet, PACKET_QAgent},
4676 { "QTBuffer:size", PACKET_DISABLE,
4677 remote_supported_packet, PACKET_QTBuffer_size},
4678 { "tracenz", PACKET_DISABLE, remote_supported_packet, PACKET_tracenz_feature },
4679 { "Qbtrace:off", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_off },
4680 { "Qbtrace:bts", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_bts },
4681 { "Qbtrace:pt", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_pt },
4682 { "qXfer:btrace:read", PACKET_DISABLE, remote_supported_packet,
4683 PACKET_qXfer_btrace },
4684 { "qXfer:btrace-conf:read", PACKET_DISABLE, remote_supported_packet,
4685 PACKET_qXfer_btrace_conf },
4686 { "Qbtrace-conf:bts:size", PACKET_DISABLE, remote_supported_packet,
4687 PACKET_Qbtrace_conf_bts_size },
4688 { "swbreak", PACKET_DISABLE, remote_supported_packet, PACKET_swbreak_feature },
4689 { "hwbreak", PACKET_DISABLE, remote_supported_packet, PACKET_hwbreak_feature },
4690 { "fork-events", PACKET_DISABLE, remote_supported_packet,
4691 PACKET_fork_event_feature },
4692 { "vfork-events", PACKET_DISABLE, remote_supported_packet,
4693 PACKET_vfork_event_feature },
4694 { "exec-events", PACKET_DISABLE, remote_supported_packet,
4695 PACKET_exec_event_feature },
4696 { "Qbtrace-conf:pt:size", PACKET_DISABLE, remote_supported_packet,
4697 PACKET_Qbtrace_conf_pt_size },
4698 { "vContSupported", PACKET_DISABLE, remote_supported_packet, PACKET_vContSupported },
4699 { "QThreadEvents", PACKET_DISABLE, remote_supported_packet, PACKET_QThreadEvents },
4700 { "no-resumed", PACKET_DISABLE, remote_supported_packet, PACKET_no_resumed },
4703 static char *remote_support_xml;
4705 /* Register string appended to "xmlRegisters=" in qSupported query. */
4708 register_remote_support_xml (const char *xml)
4710 #if defined(HAVE_LIBEXPAT)
4711 if (remote_support_xml == NULL)
4712 remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL);
4715 char *copy = xstrdup (remote_support_xml + 13);
4716 char *p = strtok (copy, ",");
4720 if (strcmp (p, xml) == 0)
4727 while ((p = strtok (NULL, ",")) != NULL);
4730 remote_support_xml = reconcat (remote_support_xml,
4731 remote_support_xml, ",", xml,
4738 remote_query_supported_append (char *msg, const char *append)
4741 return reconcat (msg, msg, ";", append, (char *) NULL);
4743 return xstrdup (append);
4747 remote_query_supported (void)
4749 struct remote_state *rs = get_remote_state ();
4752 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
4754 /* The packet support flags are handled differently for this packet
4755 than for most others. We treat an error, a disabled packet, and
4756 an empty response identically: any features which must be reported
4757 to be used will be automatically disabled. An empty buffer
4758 accomplishes this, since that is also the representation for a list
4759 containing no features. */
4762 if (packet_support (PACKET_qSupported) != PACKET_DISABLE)
4765 struct cleanup *old_chain = make_cleanup (free_current_contents, &q);
4767 if (packet_set_cmd_state (PACKET_multiprocess_feature) != AUTO_BOOLEAN_FALSE)
4768 q = remote_query_supported_append (q, "multiprocess+");
4770 if (packet_set_cmd_state (PACKET_swbreak_feature) != AUTO_BOOLEAN_FALSE)
4771 q = remote_query_supported_append (q, "swbreak+");
4772 if (packet_set_cmd_state (PACKET_hwbreak_feature) != AUTO_BOOLEAN_FALSE)
4773 q = remote_query_supported_append (q, "hwbreak+");
4775 q = remote_query_supported_append (q, "qRelocInsn+");
4777 if (packet_set_cmd_state (PACKET_fork_event_feature)
4778 != AUTO_BOOLEAN_FALSE)
4779 q = remote_query_supported_append (q, "fork-events+");
4780 if (packet_set_cmd_state (PACKET_vfork_event_feature)
4781 != AUTO_BOOLEAN_FALSE)
4782 q = remote_query_supported_append (q, "vfork-events+");
4783 if (packet_set_cmd_state (PACKET_exec_event_feature)
4784 != AUTO_BOOLEAN_FALSE)
4785 q = remote_query_supported_append (q, "exec-events+");
4787 if (packet_set_cmd_state (PACKET_vContSupported) != AUTO_BOOLEAN_FALSE)
4788 q = remote_query_supported_append (q, "vContSupported+");
4790 if (packet_set_cmd_state (PACKET_QThreadEvents) != AUTO_BOOLEAN_FALSE)
4791 q = remote_query_supported_append (q, "QThreadEvents+");
4793 if (packet_set_cmd_state (PACKET_no_resumed) != AUTO_BOOLEAN_FALSE)
4794 q = remote_query_supported_append (q, "no-resumed+");
4796 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4797 the qSupported:xmlRegisters=i386 handling. */
4798 if (remote_support_xml != NULL)
4799 q = remote_query_supported_append (q, remote_support_xml);
4801 q = reconcat (q, "qSupported:", q, (char *) NULL);
4804 do_cleanups (old_chain);
4806 getpkt (&rs->buf, &rs->buf_size, 0);
4808 /* If an error occured, warn, but do not return - just reset the
4809 buffer to empty and go on to disable features. */
4810 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
4813 warning (_("Remote failure reply: %s"), rs->buf);
4818 memset (seen, 0, sizeof (seen));
4823 enum packet_support is_supported;
4824 char *p, *end, *name_end, *value;
4826 /* First separate out this item from the rest of the packet. If
4827 there's another item after this, we overwrite the separator
4828 (terminated strings are much easier to work with). */
4830 end = strchr (p, ';');
4833 end = p + strlen (p);
4843 warning (_("empty item in \"qSupported\" response"));
4848 name_end = strchr (p, '=');
4851 /* This is a name=value entry. */
4852 is_supported = PACKET_ENABLE;
4853 value = name_end + 1;
4862 is_supported = PACKET_ENABLE;
4866 is_supported = PACKET_DISABLE;
4870 is_supported = PACKET_SUPPORT_UNKNOWN;
4874 warning (_("unrecognized item \"%s\" "
4875 "in \"qSupported\" response"), p);
4881 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4882 if (strcmp (remote_protocol_features[i].name, p) == 0)
4884 const struct protocol_feature *feature;
4887 feature = &remote_protocol_features[i];
4888 feature->func (feature, is_supported, value);
4893 /* If we increased the packet size, make sure to increase the global
4894 buffer size also. We delay this until after parsing the entire
4895 qSupported packet, because this is the same buffer we were
4897 if (rs->buf_size < rs->explicit_packet_size)
4899 rs->buf_size = rs->explicit_packet_size;
4900 rs->buf = (char *) xrealloc (rs->buf, rs->buf_size);
4903 /* Handle the defaults for unmentioned features. */
4904 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4907 const struct protocol_feature *feature;
4909 feature = &remote_protocol_features[i];
4910 feature->func (feature, feature->default_support, NULL);
4914 /* Serial QUIT handler for the remote serial descriptor.
4916 Defers handling a Ctrl-C until we're done with the current
4917 command/response packet sequence, unless:
4919 - We're setting up the connection. Don't send a remote interrupt
4920 request, as we're not fully synced yet. Quit immediately
4923 - The target has been resumed in the foreground
4924 (target_terminal_is_ours is false) with a synchronous resume
4925 packet, and we're blocked waiting for the stop reply, thus a
4926 Ctrl-C should be immediately sent to the target.
4928 - We get a second Ctrl-C while still within the same serial read or
4929 write. In that case the serial is seemingly wedged --- offer to
4932 - We see a second Ctrl-C without target response, after having
4933 previously interrupted the target. In that case the target/stub
4934 is probably wedged --- offer to quit/disconnect.
4938 remote_serial_quit_handler (void)
4940 struct remote_state *rs = get_remote_state ();
4942 if (check_quit_flag ())
4944 /* If we're starting up, we're not fully synced yet. Quit
4946 if (rs->starting_up)
4948 else if (rs->got_ctrlc_during_io)
4950 if (query (_("The target is not responding to GDB commands.\n"
4951 "Stop debugging it? ")))
4952 remote_unpush_and_throw ();
4954 /* If ^C has already been sent once, offer to disconnect. */
4955 else if (!target_terminal_is_ours () && rs->ctrlc_pending_p)
4957 /* All-stop protocol, and blocked waiting for stop reply. Send
4958 an interrupt request. */
4959 else if (!target_terminal_is_ours () && rs->waiting_for_stop_reply)
4960 target_interrupt (inferior_ptid);
4962 rs->got_ctrlc_during_io = 1;
4966 /* Remove any of the remote.c targets from target stack. Upper targets depend
4967 on it so remove them first. */
4970 remote_unpush_target (void)
4972 pop_all_targets_at_and_above (process_stratum);
4976 remote_unpush_and_throw (void)
4978 remote_unpush_target ();
4979 throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target."));
4983 remote_open_1 (const char *name, int from_tty,
4984 struct target_ops *target, int extended_p)
4986 struct remote_state *rs = get_remote_state ();
4989 error (_("To open a remote debug connection, you need to specify what\n"
4990 "serial device is attached to the remote system\n"
4991 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4993 /* See FIXME above. */
4994 if (!target_async_permitted)
4995 wait_forever_enabled_p = 1;
4997 /* If we're connected to a running target, target_preopen will kill it.
4998 Ask this question first, before target_preopen has a chance to kill
5000 if (rs->remote_desc != NULL && !have_inferiors ())
5003 && !query (_("Already connected to a remote target. Disconnect? ")))
5004 error (_("Still connected."));
5007 /* Here the possibly existing remote target gets unpushed. */
5008 target_preopen (from_tty);
5010 /* Make sure we send the passed signals list the next time we resume. */
5011 xfree (rs->last_pass_packet);
5012 rs->last_pass_packet = NULL;
5014 /* Make sure we send the program signals list the next time we
5016 xfree (rs->last_program_signals_packet);
5017 rs->last_program_signals_packet = NULL;
5019 remote_fileio_reset ();
5020 reopen_exec_file ();
5023 rs->remote_desc = remote_serial_open (name);
5024 if (!rs->remote_desc)
5025 perror_with_name (name);
5027 if (baud_rate != -1)
5029 if (serial_setbaudrate (rs->remote_desc, baud_rate))
5031 /* The requested speed could not be set. Error out to
5032 top level after closing remote_desc. Take care to
5033 set remote_desc to NULL to avoid closing remote_desc
5035 serial_close (rs->remote_desc);
5036 rs->remote_desc = NULL;
5037 perror_with_name (name);
5041 serial_setparity (rs->remote_desc, serial_parity);
5042 serial_raw (rs->remote_desc);
5044 /* If there is something sitting in the buffer we might take it as a
5045 response to a command, which would be bad. */
5046 serial_flush_input (rs->remote_desc);
5050 puts_filtered ("Remote debugging using ");
5051 puts_filtered (name);
5052 puts_filtered ("\n");
5054 push_target (target); /* Switch to using remote target now. */
5056 /* Register extra event sources in the event loop. */
5057 remote_async_inferior_event_token
5058 = create_async_event_handler (remote_async_inferior_event_handler,
5060 rs->notif_state = remote_notif_state_allocate ();
5062 /* Reset the target state; these things will be queried either by
5063 remote_query_supported or as they are needed. */
5064 reset_all_packet_configs_support ();
5065 rs->cached_wait_status = 0;
5066 rs->explicit_packet_size = 0;
5068 rs->extended = extended_p;
5069 rs->waiting_for_stop_reply = 0;
5070 rs->ctrlc_pending_p = 0;
5071 rs->got_ctrlc_during_io = 0;
5073 rs->general_thread = not_sent_ptid;
5074 rs->continue_thread = not_sent_ptid;
5075 rs->remote_traceframe_number = -1;
5077 rs->last_resume_exec_dir = EXEC_FORWARD;
5079 /* Probe for ability to use "ThreadInfo" query, as required. */
5080 rs->use_threadinfo_query = 1;
5081 rs->use_threadextra_query = 1;
5083 readahead_cache_invalidate ();
5085 /* Start out by owning the terminal. */
5086 remote_async_terminal_ours_p = 1;
5088 if (target_async_permitted)
5090 /* FIXME: cagney/1999-09-23: During the initial connection it is
5091 assumed that the target is already ready and able to respond to
5092 requests. Unfortunately remote_start_remote() eventually calls
5093 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5094 around this. Eventually a mechanism that allows
5095 wait_for_inferior() to expect/get timeouts will be
5097 wait_forever_enabled_p = 0;
5100 /* First delete any symbols previously loaded from shared libraries. */
5101 no_shared_libraries (NULL, 0);
5104 init_thread_list ();
5106 /* Start the remote connection. If error() or QUIT, discard this
5107 target (we'd otherwise be in an inconsistent state) and then
5108 propogate the error on up the exception chain. This ensures that
5109 the caller doesn't stumble along blindly assuming that the
5110 function succeeded. The CLI doesn't have this problem but other
5111 UI's, such as MI do.
5113 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5114 this function should return an error indication letting the
5115 caller restore the previous state. Unfortunately the command
5116 ``target remote'' is directly wired to this function making that
5117 impossible. On a positive note, the CLI side of this problem has
5118 been fixed - the function set_cmd_context() makes it possible for
5119 all the ``target ....'' commands to share a common callback
5120 function. See cli-dump.c. */
5125 remote_start_remote (from_tty, target, extended_p);
5127 CATCH (ex, RETURN_MASK_ALL)
5129 /* Pop the partially set up target - unless something else did
5130 already before throwing the exception. */
5131 if (rs->remote_desc != NULL)
5132 remote_unpush_target ();
5133 if (target_async_permitted)
5134 wait_forever_enabled_p = 1;
5135 throw_exception (ex);
5140 remote_btrace_reset ();
5142 if (target_async_permitted)
5143 wait_forever_enabled_p = 1;
5146 /* Detach the specified process. */
5149 remote_detach_pid (int pid)
5151 struct remote_state *rs = get_remote_state ();
5153 if (remote_multi_process_p (rs))
5154 xsnprintf (rs->buf, get_remote_packet_size (), "D;%x", pid);
5156 strcpy (rs->buf, "D");
5159 getpkt (&rs->buf, &rs->buf_size, 0);
5161 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
5163 else if (rs->buf[0] == '\0')
5164 error (_("Remote doesn't know how to detach"));
5166 error (_("Can't detach process."));
5169 /* This detaches a program to which we previously attached, using
5170 inferior_ptid to identify the process. After this is done, GDB
5171 can be used to debug some other program. We better not have left
5172 any breakpoints in the target program or it'll die when it hits
5176 remote_detach_1 (const char *args, int from_tty)
5178 int pid = ptid_get_pid (inferior_ptid);
5179 struct remote_state *rs = get_remote_state ();
5180 struct thread_info *tp = find_thread_ptid (inferior_ptid);
5184 error (_("Argument given to \"detach\" when remotely debugging."));
5186 if (!target_has_execution)
5187 error (_("No process to detach from."));
5189 target_announce_detach (from_tty);
5191 /* Tell the remote target to detach. */
5192 remote_detach_pid (pid);
5194 /* Exit only if this is the only active inferior. */
5195 if (from_tty && !rs->extended && number_of_live_inferiors () == 1)
5196 puts_filtered (_("Ending remote debugging.\n"));
5198 /* Check to see if we are detaching a fork parent. Note that if we
5199 are detaching a fork child, tp == NULL. */
5200 is_fork_parent = (tp != NULL
5201 && tp->pending_follow.kind == TARGET_WAITKIND_FORKED);
5203 /* If doing detach-on-fork, we don't mourn, because that will delete
5204 breakpoints that should be available for the followed inferior. */
5205 if (!is_fork_parent)
5206 target_mourn_inferior (inferior_ptid);
5209 inferior_ptid = null_ptid;
5210 detach_inferior (pid);
5215 remote_detach (struct target_ops *ops, const char *args, int from_tty)
5217 remote_detach_1 (args, from_tty);
5221 extended_remote_detach (struct target_ops *ops, const char *args, int from_tty)
5223 remote_detach_1 (args, from_tty);
5226 /* Target follow-fork function for remote targets. On entry, and
5227 at return, the current inferior is the fork parent.
5229 Note that although this is currently only used for extended-remote,
5230 it is named remote_follow_fork in anticipation of using it for the
5231 remote target as well. */
5234 remote_follow_fork (struct target_ops *ops, int follow_child,
5237 struct remote_state *rs = get_remote_state ();
5238 enum target_waitkind kind = inferior_thread ()->pending_follow.kind;
5240 if ((kind == TARGET_WAITKIND_FORKED && remote_fork_event_p (rs))
5241 || (kind == TARGET_WAITKIND_VFORKED && remote_vfork_event_p (rs)))
5243 /* When following the parent and detaching the child, we detach
5244 the child here. For the case of following the child and
5245 detaching the parent, the detach is done in the target-
5246 independent follow fork code in infrun.c. We can't use
5247 target_detach when detaching an unfollowed child because
5248 the client side doesn't know anything about the child. */
5249 if (detach_fork && !follow_child)
5251 /* Detach the fork child. */
5255 child_ptid = inferior_thread ()->pending_follow.value.related_pid;
5256 child_pid = ptid_get_pid (child_ptid);
5258 remote_detach_pid (child_pid);
5259 detach_inferior (child_pid);
5265 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5266 in the program space of the new inferior. On entry and at return the
5267 current inferior is the exec'ing inferior. INF is the new exec'd
5268 inferior, which may be the same as the exec'ing inferior unless
5269 follow-exec-mode is "new". */
5272 remote_follow_exec (struct target_ops *ops,
5273 struct inferior *inf, char *execd_pathname)
5275 /* We know that this is a target file name, so if it has the "target:"
5276 prefix we strip it off before saving it in the program space. */
5277 if (is_target_filename (execd_pathname))
5278 execd_pathname += strlen (TARGET_SYSROOT_PREFIX);
5280 set_pspace_remote_exec_file (inf->pspace, execd_pathname);
5283 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5286 remote_disconnect (struct target_ops *target, const char *args, int from_tty)
5289 error (_("Argument given to \"disconnect\" when remotely debugging."));
5291 /* Make sure we unpush even the extended remote targets. Calling
5292 target_mourn_inferior won't unpush, and remote_mourn won't
5293 unpush if there is more than one inferior left. */
5294 unpush_target (target);
5295 generic_mourn_inferior ();
5298 puts_filtered ("Ending remote debugging.\n");
5301 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5302 be chatty about it. */
5305 extended_remote_attach (struct target_ops *target, const char *args,
5308 struct remote_state *rs = get_remote_state ();
5310 char *wait_status = NULL;
5312 pid = parse_pid_to_attach (args);
5314 /* Remote PID can be freely equal to getpid, do not check it here the same
5315 way as in other targets. */
5317 if (packet_support (PACKET_vAttach) == PACKET_DISABLE)
5318 error (_("This target does not support attaching to a process"));
5322 char *exec_file = get_exec_file (0);
5325 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
5326 target_pid_to_str (pid_to_ptid (pid)));
5328 printf_unfiltered (_("Attaching to %s\n"),
5329 target_pid_to_str (pid_to_ptid (pid)));
5331 gdb_flush (gdb_stdout);
5334 xsnprintf (rs->buf, get_remote_packet_size (), "vAttach;%x", pid);
5336 getpkt (&rs->buf, &rs->buf_size, 0);
5338 switch (packet_ok (rs->buf,
5339 &remote_protocol_packets[PACKET_vAttach]))
5342 if (!target_is_non_stop_p ())
5344 /* Save the reply for later. */
5345 wait_status = (char *) alloca (strlen (rs->buf) + 1);
5346 strcpy (wait_status, rs->buf);
5348 else if (strcmp (rs->buf, "OK") != 0)
5349 error (_("Attaching to %s failed with: %s"),
5350 target_pid_to_str (pid_to_ptid (pid)),
5353 case PACKET_UNKNOWN:
5354 error (_("This target does not support attaching to a process"));
5356 error (_("Attaching to %s failed"),
5357 target_pid_to_str (pid_to_ptid (pid)));
5360 set_current_inferior (remote_add_inferior (0, pid, 1, 0));
5362 inferior_ptid = pid_to_ptid (pid);
5364 if (target_is_non_stop_p ())
5366 struct thread_info *thread;
5368 /* Get list of threads. */
5369 remote_update_thread_list (target);
5371 thread = first_thread_of_process (pid);
5373 inferior_ptid = thread->ptid;
5375 inferior_ptid = pid_to_ptid (pid);
5377 /* Invalidate our notion of the remote current thread. */
5378 record_currthread (rs, minus_one_ptid);
5382 /* Now, if we have thread information, update inferior_ptid. */
5383 inferior_ptid = remote_current_thread (inferior_ptid);
5385 /* Add the main thread to the thread list. */
5386 add_thread_silent (inferior_ptid);
5389 /* Next, if the target can specify a description, read it. We do
5390 this before anything involving memory or registers. */
5391 target_find_description ();
5393 if (!target_is_non_stop_p ())
5395 /* Use the previously fetched status. */
5396 gdb_assert (wait_status != NULL);
5398 if (target_can_async_p ())
5400 struct notif_event *reply
5401 = remote_notif_parse (¬if_client_stop, wait_status);
5403 push_stop_reply ((struct stop_reply *) reply);
5409 gdb_assert (wait_status != NULL);
5410 strcpy (rs->buf, wait_status);
5411 rs->cached_wait_status = 1;
5415 gdb_assert (wait_status == NULL);
5418 /* Implementation of the to_post_attach method. */
5421 extended_remote_post_attach (struct target_ops *ops, int pid)
5423 /* Get text, data & bss offsets. */
5426 /* In certain cases GDB might not have had the chance to start
5427 symbol lookup up until now. This could happen if the debugged
5428 binary is not using shared libraries, the vsyscall page is not
5429 present (on Linux) and the binary itself hadn't changed since the
5430 debugging process was started. */
5431 if (symfile_objfile != NULL)
5432 remote_check_symbols();
5436 /* Check for the availability of vCont. This function should also check
5440 remote_vcont_probe (struct remote_state *rs)
5444 strcpy (rs->buf, "vCont?");
5446 getpkt (&rs->buf, &rs->buf_size, 0);
5449 /* Make sure that the features we assume are supported. */
5450 if (startswith (buf, "vCont"))
5453 int support_c, support_C;
5455 rs->supports_vCont.s = 0;
5456 rs->supports_vCont.S = 0;
5459 rs->supports_vCont.t = 0;
5460 rs->supports_vCont.r = 0;
5461 while (p && *p == ';')
5464 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
5465 rs->supports_vCont.s = 1;
5466 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
5467 rs->supports_vCont.S = 1;
5468 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
5470 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
5472 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
5473 rs->supports_vCont.t = 1;
5474 else if (*p == 'r' && (*(p + 1) == ';' || *(p + 1) == 0))
5475 rs->supports_vCont.r = 1;
5477 p = strchr (p, ';');
5480 /* If c, and C are not all supported, we can't use vCont. Clearing
5481 BUF will make packet_ok disable the packet. */
5482 if (!support_c || !support_C)
5486 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
5489 /* Helper function for building "vCont" resumptions. Write a
5490 resumption to P. ENDP points to one-passed-the-end of the buffer
5491 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5492 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5493 resumed thread should be single-stepped and/or signalled. If PTID
5494 equals minus_one_ptid, then all threads are resumed; if PTID
5495 represents a process, then all threads of the process are resumed;
5496 the thread to be stepped and/or signalled is given in the global
5500 append_resumption (char *p, char *endp,
5501 ptid_t ptid, int step, enum gdb_signal siggnal)
5503 struct remote_state *rs = get_remote_state ();
5505 if (step && siggnal != GDB_SIGNAL_0)
5506 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
5508 /* GDB is willing to range step. */
5509 && use_range_stepping
5510 /* Target supports range stepping. */
5511 && rs->supports_vCont.r
5512 /* We don't currently support range stepping multiple
5513 threads with a wildcard (though the protocol allows it,
5514 so stubs shouldn't make an active effort to forbid
5516 && !(remote_multi_process_p (rs) && ptid_is_pid (ptid)))
5518 struct thread_info *tp;
5520 if (ptid_equal (ptid, minus_one_ptid))
5522 /* If we don't know about the target thread's tid, then
5523 we're resuming magic_null_ptid (see caller). */
5524 tp = find_thread_ptid (magic_null_ptid);
5527 tp = find_thread_ptid (ptid);
5528 gdb_assert (tp != NULL);
5530 if (tp->control.may_range_step)
5532 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
5534 p += xsnprintf (p, endp - p, ";r%s,%s",
5535 phex_nz (tp->control.step_range_start,
5537 phex_nz (tp->control.step_range_end,
5541 p += xsnprintf (p, endp - p, ";s");
5544 p += xsnprintf (p, endp - p, ";s");
5545 else if (siggnal != GDB_SIGNAL_0)
5546 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
5548 p += xsnprintf (p, endp - p, ";c");
5550 if (remote_multi_process_p (rs) && ptid_is_pid (ptid))
5554 /* All (-1) threads of process. */
5555 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
5557 p += xsnprintf (p, endp - p, ":");
5558 p = write_ptid (p, endp, nptid);
5560 else if (!ptid_equal (ptid, minus_one_ptid))
5562 p += xsnprintf (p, endp - p, ":");
5563 p = write_ptid (p, endp, ptid);
5569 /* Clear the thread's private info on resume. */
5572 resume_clear_thread_private_info (struct thread_info *thread)
5574 if (thread->priv != NULL)
5576 thread->priv->stop_reason = TARGET_STOPPED_BY_NO_REASON;
5577 thread->priv->watch_data_address = 0;
5581 /* Append a vCont continue-with-signal action for threads that have a
5582 non-zero stop signal. */
5585 append_pending_thread_resumptions (char *p, char *endp, ptid_t ptid)
5587 struct thread_info *thread;
5589 ALL_NON_EXITED_THREADS (thread)
5590 if (ptid_match (thread->ptid, ptid)
5591 && !ptid_equal (inferior_ptid, thread->ptid)
5592 && thread->suspend.stop_signal != GDB_SIGNAL_0)
5594 p = append_resumption (p, endp, thread->ptid,
5595 0, thread->suspend.stop_signal);
5596 thread->suspend.stop_signal = GDB_SIGNAL_0;
5597 resume_clear_thread_private_info (thread);
5603 /* Set the target running, using the packets that use Hc
5607 remote_resume_with_hc (struct target_ops *ops,
5608 ptid_t ptid, int step, enum gdb_signal siggnal)
5610 struct remote_state *rs = get_remote_state ();
5611 struct thread_info *thread;
5614 rs->last_sent_signal = siggnal;
5615 rs->last_sent_step = step;
5617 /* The c/s/C/S resume packets use Hc, so set the continue
5619 if (ptid_equal (ptid, minus_one_ptid))
5620 set_continue_thread (any_thread_ptid);
5622 set_continue_thread (ptid);
5624 ALL_NON_EXITED_THREADS (thread)
5625 resume_clear_thread_private_info (thread);
5628 if (execution_direction == EXEC_REVERSE)
5630 /* We don't pass signals to the target in reverse exec mode. */
5631 if (info_verbose && siggnal != GDB_SIGNAL_0)
5632 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5635 if (step && packet_support (PACKET_bs) == PACKET_DISABLE)
5636 error (_("Remote reverse-step not supported."));
5637 if (!step && packet_support (PACKET_bc) == PACKET_DISABLE)
5638 error (_("Remote reverse-continue not supported."));
5640 strcpy (buf, step ? "bs" : "bc");
5642 else if (siggnal != GDB_SIGNAL_0)
5644 buf[0] = step ? 'S' : 'C';
5645 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
5646 buf[2] = tohex (((int) siggnal) & 0xf);
5650 strcpy (buf, step ? "s" : "c");
5655 /* Resume the remote inferior by using a "vCont" packet. The thread
5656 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5657 resumed thread should be single-stepped and/or signalled. If PTID
5658 equals minus_one_ptid, then all threads are resumed; the thread to
5659 be stepped and/or signalled is given in the global INFERIOR_PTID.
5660 This function returns non-zero iff it resumes the inferior.
5662 This function issues a strict subset of all possible vCont commands
5666 remote_resume_with_vcont (ptid_t ptid, int step, enum gdb_signal siggnal)
5668 struct remote_state *rs = get_remote_state ();
5672 /* No reverse execution actions defined for vCont. */
5673 if (execution_direction == EXEC_REVERSE)
5676 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
5677 remote_vcont_probe (rs);
5679 if (packet_support (PACKET_vCont) == PACKET_DISABLE)
5683 endp = rs->buf + get_remote_packet_size ();
5685 /* If we could generate a wider range of packets, we'd have to worry
5686 about overflowing BUF. Should there be a generic
5687 "multi-part-packet" packet? */
5689 p += xsnprintf (p, endp - p, "vCont");
5691 if (ptid_equal (ptid, magic_null_ptid))
5693 /* MAGIC_NULL_PTID means that we don't have any active threads,
5694 so we don't have any TID numbers the inferior will
5695 understand. Make sure to only send forms that do not specify
5697 append_resumption (p, endp, minus_one_ptid, step, siggnal);
5699 else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
5701 /* Resume all threads (of all processes, or of a single
5702 process), with preference for INFERIOR_PTID. This assumes
5703 inferior_ptid belongs to the set of all threads we are about
5705 if (step || siggnal != GDB_SIGNAL_0)
5707 /* Step inferior_ptid, with or without signal. */
5708 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
5711 /* Also pass down any pending signaled resumption for other
5712 threads not the current. */
5713 p = append_pending_thread_resumptions (p, endp, ptid);
5715 /* And continue others without a signal. */
5716 append_resumption (p, endp, ptid, /*step=*/ 0, GDB_SIGNAL_0);
5720 /* Scheduler locking; resume only PTID. */
5721 append_resumption (p, endp, ptid, step, siggnal);
5724 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
5727 if (target_is_non_stop_p ())
5729 /* In non-stop, the stub replies to vCont with "OK". The stop
5730 reply will be reported asynchronously by means of a `%Stop'
5732 getpkt (&rs->buf, &rs->buf_size, 0);
5733 if (strcmp (rs->buf, "OK") != 0)
5734 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
5740 /* Tell the remote machine to resume. */
5743 remote_resume (struct target_ops *ops,
5744 ptid_t ptid, int step, enum gdb_signal siggnal)
5746 struct remote_state *rs = get_remote_state ();
5748 /* When connected in non-stop mode, the core resumes threads
5749 individually. Resuming remote threads directly in target_resume
5750 would thus result in sending one packet per thread. Instead, to
5751 minimize roundtrip latency, here we just store the resume
5752 request; the actual remote resumption will be done in
5753 target_commit_resume / remote_commit_resume, where we'll be able
5754 to do vCont action coalescing. */
5755 if (target_is_non_stop_p () && execution_direction != EXEC_REVERSE)
5757 struct private_thread_info *remote_thr;
5759 if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid))
5760 remote_thr = get_private_info_ptid (inferior_ptid);
5762 remote_thr = get_private_info_ptid (ptid);
5763 remote_thr->last_resume_step = step;
5764 remote_thr->last_resume_sig = siggnal;
5768 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5769 (explained in remote-notif.c:handle_notification) so
5770 remote_notif_process is not called. We need find a place where
5771 it is safe to start a 'vNotif' sequence. It is good to do it
5772 before resuming inferior, because inferior was stopped and no RSP
5773 traffic at that moment. */
5774 if (!target_is_non_stop_p ())
5775 remote_notif_process (rs->notif_state, ¬if_client_stop);
5777 rs->last_resume_exec_dir = execution_direction;
5779 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
5780 if (!remote_resume_with_vcont (ptid, step, siggnal))
5781 remote_resume_with_hc (ops, ptid, step, siggnal);
5783 /* We are about to start executing the inferior, let's register it
5784 with the event loop. NOTE: this is the one place where all the
5785 execution commands end up. We could alternatively do this in each
5786 of the execution commands in infcmd.c. */
5787 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5788 into infcmd.c in order to allow inferior function calls to work
5789 NOT asynchronously. */
5790 if (target_can_async_p ())
5793 /* We've just told the target to resume. The remote server will
5794 wait for the inferior to stop, and then send a stop reply. In
5795 the mean time, we can't start another command/query ourselves
5796 because the stub wouldn't be ready to process it. This applies
5797 only to the base all-stop protocol, however. In non-stop (which
5798 only supports vCont), the stub replies with an "OK", and is
5799 immediate able to process further serial input. */
5800 if (!target_is_non_stop_p ())
5801 rs->waiting_for_stop_reply = 1;
5804 static void check_pending_events_prevent_wildcard_vcont
5805 (int *may_global_wildcard_vcont);
5806 static int is_pending_fork_parent_thread (struct thread_info *thread);
5808 /* Private per-inferior info for target remote processes. */
5810 struct private_inferior
5812 /* Whether we can send a wildcard vCont for this process. */
5813 int may_wildcard_vcont;
5816 /* Structure used to track the construction of a vCont packet in the
5817 outgoing packet buffer. This is used to send multiple vCont
5818 packets if we have more actions than would fit a single packet. */
5820 struct vcont_builder
5822 /* Pointer to the first action. P points here if no action has been
5826 /* Where the next action will be appended. */
5829 /* The end of the buffer. Must never write past this. */
5833 /* Prepare the outgoing buffer for a new vCont packet. */
5836 vcont_builder_restart (struct vcont_builder *builder)
5838 struct remote_state *rs = get_remote_state ();
5840 builder->p = rs->buf;
5841 builder->endp = rs->buf + get_remote_packet_size ();
5842 builder->p += xsnprintf (builder->p, builder->endp - builder->p, "vCont");
5843 builder->first_action = builder->p;
5846 /* If the vCont packet being built has any action, send it to the
5850 vcont_builder_flush (struct vcont_builder *builder)
5852 struct remote_state *rs;
5854 if (builder->p == builder->first_action)
5857 rs = get_remote_state ();
5859 getpkt (&rs->buf, &rs->buf_size, 0);
5860 if (strcmp (rs->buf, "OK") != 0)
5861 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
5864 /* The largest action is range-stepping, with its two addresses. This
5865 is more than sufficient. If a new, bigger action is created, it'll
5866 quickly trigger a failed assertion in append_resumption (and we'll
5868 #define MAX_ACTION_SIZE 200
5870 /* Append a new vCont action in the outgoing packet being built. If
5871 the action doesn't fit the packet along with previous actions, push
5872 what we've got so far to the remote end and start over a new vCont
5873 packet (with the new action). */
5876 vcont_builder_push_action (struct vcont_builder *builder,
5877 ptid_t ptid, int step, enum gdb_signal siggnal)
5879 char buf[MAX_ACTION_SIZE + 1];
5883 endp = append_resumption (buf, buf + sizeof (buf),
5884 ptid, step, siggnal);
5886 /* Check whether this new action would fit in the vCont packet along
5887 with previous actions. If not, send what we've got so far and
5888 start a new vCont packet. */
5890 if (rsize > builder->endp - builder->p)
5892 vcont_builder_flush (builder);
5893 vcont_builder_restart (builder);
5895 /* Should now fit. */
5896 gdb_assert (rsize <= builder->endp - builder->p);
5899 memcpy (builder->p, buf, rsize);
5900 builder->p += rsize;
5904 /* to_commit_resume implementation. */
5907 remote_commit_resume (struct target_ops *ops)
5909 struct remote_state *rs = get_remote_state ();
5910 struct inferior *inf;
5911 struct thread_info *tp;
5912 int any_process_wildcard;
5913 int may_global_wildcard_vcont;
5914 struct vcont_builder vcont_builder;
5916 /* If connected in all-stop mode, we'd send the remote resume
5917 request directly from remote_resume. Likewise if
5918 reverse-debugging, as there are no defined vCont actions for
5919 reverse execution. */
5920 if (!target_is_non_stop_p () || execution_direction == EXEC_REVERSE)
5923 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
5924 instead of resuming all threads of each process individually.
5925 However, if any thread of a process must remain halted, we can't
5926 send wildcard resumes and must send one action per thread.
5928 Care must be taken to not resume threads/processes the server
5929 side already told us are stopped, but the core doesn't know about
5930 yet, because the events are still in the vStopped notification
5933 #1 => vCont s:p1.1;c
5935 #3 <= %Stopped T05 p1.1
5940 #8 (infrun handles the stop for p1.1 and continues stepping)
5941 #9 => vCont s:p1.1;c
5943 The last vCont above would resume thread p1.2 by mistake, because
5944 the server has no idea that the event for p1.2 had not been
5947 The server side must similarly ignore resume actions for the
5948 thread that has a pending %Stopped notification (and any other
5949 threads with events pending), until GDB acks the notification
5950 with vStopped. Otherwise, e.g., the following case is
5953 #1 => g (or any other packet)
5955 #3 <= %Stopped T05 p1.2
5956 #4 => vCont s:p1.1;c
5959 Above, the server must not resume thread p1.2. GDB can't know
5960 that p1.2 stopped until it acks the %Stopped notification, and
5961 since from GDB's perspective all threads should be running, it
5964 Finally, special care must also be given to handling fork/vfork
5965 events. A (v)fork event actually tells us that two processes
5966 stopped -- the parent and the child. Until we follow the fork,
5967 we must not resume the child. Therefore, if we have a pending
5968 fork follow, we must not send a global wildcard resume action
5969 (vCont;c). We can still send process-wide wildcards though. */
5971 /* Start by assuming a global wildcard (vCont;c) is possible. */
5972 may_global_wildcard_vcont = 1;
5974 /* And assume every process is individually wildcard-able too. */
5975 ALL_NON_EXITED_INFERIORS (inf)
5977 if (inf->priv == NULL)
5978 inf->priv = XNEW (struct private_inferior);
5979 inf->priv->may_wildcard_vcont = 1;
5982 /* Check for any pending events (not reported or processed yet) and
5983 disable process and global wildcard resumes appropriately. */
5984 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont);
5986 ALL_NON_EXITED_THREADS (tp)
5988 /* If a thread of a process is not meant to be resumed, then we
5989 can't wildcard that process. */
5992 tp->inf->priv->may_wildcard_vcont = 0;
5994 /* And if we can't wildcard a process, we can't wildcard
5995 everything either. */
5996 may_global_wildcard_vcont = 0;
6000 /* If a thread is the parent of an unfollowed fork, then we
6001 can't do a global wildcard, as that would resume the fork
6003 if (is_pending_fork_parent_thread (tp))
6004 may_global_wildcard_vcont = 0;
6007 /* Now let's build the vCont packet(s). Actions must be appended
6008 from narrower to wider scopes (thread -> process -> global). If
6009 we end up with too many actions for a single packet vcont_builder
6010 flushes the current vCont packet to the remote side and starts a
6012 vcont_builder_restart (&vcont_builder);
6014 /* Threads first. */
6015 ALL_NON_EXITED_THREADS (tp)
6017 struct private_thread_info *remote_thr = tp->priv;
6019 if (!tp->executing || remote_thr->vcont_resumed)
6022 gdb_assert (!thread_is_in_step_over_chain (tp));
6024 if (!remote_thr->last_resume_step
6025 && remote_thr->last_resume_sig == GDB_SIGNAL_0
6026 && tp->inf->priv->may_wildcard_vcont)
6028 /* We'll send a wildcard resume instead. */
6029 remote_thr->vcont_resumed = 1;
6033 vcont_builder_push_action (&vcont_builder, tp->ptid,
6034 remote_thr->last_resume_step,
6035 remote_thr->last_resume_sig);
6036 remote_thr->vcont_resumed = 1;
6039 /* Now check whether we can send any process-wide wildcard. This is
6040 to avoid sending a global wildcard in the case nothing is
6041 supposed to be resumed. */
6042 any_process_wildcard = 0;
6044 ALL_NON_EXITED_INFERIORS (inf)
6046 if (inf->priv->may_wildcard_vcont)
6048 any_process_wildcard = 1;
6053 if (any_process_wildcard)
6055 /* If all processes are wildcard-able, then send a single "c"
6056 action, otherwise, send an "all (-1) threads of process"
6057 continue action for each running process, if any. */
6058 if (may_global_wildcard_vcont)
6060 vcont_builder_push_action (&vcont_builder, minus_one_ptid,
6065 ALL_NON_EXITED_INFERIORS (inf)
6067 if (inf->priv->may_wildcard_vcont)
6069 vcont_builder_push_action (&vcont_builder,
6070 pid_to_ptid (inf->pid),
6077 vcont_builder_flush (&vcont_builder);
6082 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6083 thread, all threads of a remote process, or all threads of all
6087 remote_stop_ns (ptid_t ptid)
6089 struct remote_state *rs = get_remote_state ();
6091 char *endp = rs->buf + get_remote_packet_size ();
6093 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
6094 remote_vcont_probe (rs);
6096 if (!rs->supports_vCont.t)
6097 error (_("Remote server does not support stopping threads"));
6099 if (ptid_equal (ptid, minus_one_ptid)
6100 || (!remote_multi_process_p (rs) && ptid_is_pid (ptid)))
6101 p += xsnprintf (p, endp - p, "vCont;t");
6106 p += xsnprintf (p, endp - p, "vCont;t:");
6108 if (ptid_is_pid (ptid))
6109 /* All (-1) threads of process. */
6110 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
6113 /* Small optimization: if we already have a stop reply for
6114 this thread, no use in telling the stub we want this
6116 if (peek_stop_reply (ptid))
6122 write_ptid (p, endp, nptid);
6125 /* In non-stop, we get an immediate OK reply. The stop reply will
6126 come in asynchronously by notification. */
6128 getpkt (&rs->buf, &rs->buf_size, 0);
6129 if (strcmp (rs->buf, "OK") != 0)
6130 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
6133 /* All-stop version of target_interrupt. Sends a break or a ^C to
6134 interrupt the remote target. It is undefined which thread of which
6135 process reports the interrupt. */
6138 remote_interrupt_as (void)
6140 struct remote_state *rs = get_remote_state ();
6142 rs->ctrlc_pending_p = 1;
6144 /* If the inferior is stopped already, but the core didn't know
6145 about it yet, just ignore the request. The cached wait status
6146 will be collected in remote_wait. */
6147 if (rs->cached_wait_status)
6150 /* Send interrupt_sequence to remote target. */
6151 send_interrupt_sequence ();
6154 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6155 the remote target. It is undefined which thread of which process
6156 reports the interrupt. Throws an error if the packet is not
6157 supported by the server. */
6160 remote_interrupt_ns (void)
6162 struct remote_state *rs = get_remote_state ();
6164 char *endp = rs->buf + get_remote_packet_size ();
6166 xsnprintf (p, endp - p, "vCtrlC");
6168 /* In non-stop, we get an immediate OK reply. The stop reply will
6169 come in asynchronously by notification. */
6171 getpkt (&rs->buf, &rs->buf_size, 0);
6173 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vCtrlC]))
6177 case PACKET_UNKNOWN:
6178 error (_("No support for interrupting the remote target."));
6180 error (_("Interrupting target failed: %s"), rs->buf);
6184 /* Implement the to_stop function for the remote targets. */
6187 remote_stop (struct target_ops *self, ptid_t ptid)
6190 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
6192 if (target_is_non_stop_p ())
6193 remote_stop_ns (ptid);
6196 /* We don't currently have a way to transparently pause the
6197 remote target in all-stop mode. Interrupt it instead. */
6198 remote_interrupt_as ();
6202 /* Implement the to_interrupt function for the remote targets. */
6205 remote_interrupt (struct target_ops *self, ptid_t ptid)
6207 struct remote_state *rs = get_remote_state ();
6210 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
6212 if (target_is_non_stop_p ())
6213 remote_interrupt_ns ();
6215 remote_interrupt_as ();
6218 /* Implement the to_pass_ctrlc function for the remote targets. */
6221 remote_pass_ctrlc (struct target_ops *self)
6223 struct remote_state *rs = get_remote_state ();
6226 fprintf_unfiltered (gdb_stdlog, "remote_pass_ctrlc called\n");
6228 /* If we're starting up, we're not fully synced yet. Quit
6230 if (rs->starting_up)
6232 /* If ^C has already been sent once, offer to disconnect. */
6233 else if (rs->ctrlc_pending_p)
6236 target_interrupt (inferior_ptid);
6239 /* Ask the user what to do when an interrupt is received. */
6242 interrupt_query (void)
6244 struct remote_state *rs = get_remote_state ();
6246 if (rs->waiting_for_stop_reply && rs->ctrlc_pending_p)
6248 if (query (_("The target is not responding to interrupt requests.\n"
6249 "Stop debugging it? ")))
6251 remote_unpush_target ();
6252 throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target."));
6257 if (query (_("Interrupted while waiting for the program.\n"
6258 "Give up waiting? ")))
6263 /* Enable/disable target terminal ownership. Most targets can use
6264 terminal groups to control terminal ownership. Remote targets are
6265 different in that explicit transfer of ownership to/from GDB/target
6269 remote_terminal_inferior (struct target_ops *self)
6271 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
6272 idempotent. The event-loop GDB talking to an asynchronous target
6273 with a synchronous command calls this function from both
6274 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
6275 transfer the terminal to the target when it shouldn't this guard
6277 if (!remote_async_terminal_ours_p)
6279 remote_async_terminal_ours_p = 0;
6280 /* NOTE: At this point we could also register our selves as the
6281 recipient of all input. Any characters typed could then be
6282 passed on down to the target. */
6286 remote_terminal_ours (struct target_ops *self)
6288 /* See FIXME in remote_terminal_inferior. */
6289 if (remote_async_terminal_ours_p)
6291 remote_async_terminal_ours_p = 1;
6295 remote_console_output (char *msg)
6299 for (p = msg; p[0] && p[1]; p += 2)
6302 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
6306 fputs_unfiltered (tb, gdb_stdtarg);
6308 gdb_flush (gdb_stdtarg);
6311 typedef struct cached_reg
6317 DEF_VEC_O(cached_reg_t);
6319 typedef struct stop_reply
6321 struct notif_event base;
6323 /* The identifier of the thread about this event */
6326 /* The remote state this event is associated with. When the remote
6327 connection, represented by a remote_state object, is closed,
6328 all the associated stop_reply events should be released. */
6329 struct remote_state *rs;
6331 struct target_waitstatus ws;
6333 /* Expedited registers. This makes remote debugging a bit more
6334 efficient for those targets that provide critical registers as
6335 part of their normal status mechanism (as another roundtrip to
6336 fetch them is avoided). */
6337 VEC(cached_reg_t) *regcache;
6339 enum target_stop_reason stop_reason;
6341 CORE_ADDR watch_data_address;
6346 DECLARE_QUEUE_P (stop_reply_p);
6347 DEFINE_QUEUE_P (stop_reply_p);
6348 /* The list of already fetched and acknowledged stop events. This
6349 queue is used for notification Stop, and other notifications
6350 don't need queue for their events, because the notification events
6351 of Stop can't be consumed immediately, so that events should be
6352 queued first, and be consumed by remote_wait_{ns,as} one per
6353 time. Other notifications can consume their events immediately,
6354 so queue is not needed for them. */
6355 static QUEUE (stop_reply_p) *stop_reply_queue;
6358 stop_reply_xfree (struct stop_reply *r)
6360 notif_event_xfree ((struct notif_event *) r);
6363 /* Return the length of the stop reply queue. */
6366 stop_reply_queue_length (void)
6368 return QUEUE_length (stop_reply_p, stop_reply_queue);
6372 remote_notif_stop_parse (struct notif_client *self, char *buf,
6373 struct notif_event *event)
6375 remote_parse_stop_reply (buf, (struct stop_reply *) event);
6379 remote_notif_stop_ack (struct notif_client *self, char *buf,
6380 struct notif_event *event)
6382 struct stop_reply *stop_reply = (struct stop_reply *) event;
6385 putpkt (self->ack_command);
6387 if (stop_reply->ws.kind == TARGET_WAITKIND_IGNORE)
6388 /* We got an unknown stop reply. */
6389 error (_("Unknown stop reply"));
6391 push_stop_reply (stop_reply);
6395 remote_notif_stop_can_get_pending_events (struct notif_client *self)
6397 /* We can't get pending events in remote_notif_process for
6398 notification stop, and we have to do this in remote_wait_ns
6399 instead. If we fetch all queued events from stub, remote stub
6400 may exit and we have no chance to process them back in
6402 mark_async_event_handler (remote_async_inferior_event_token);
6407 stop_reply_dtr (struct notif_event *event)
6409 struct stop_reply *r = (struct stop_reply *) event;
6414 VEC_iterate (cached_reg_t, r->regcache, ix, reg);
6418 VEC_free (cached_reg_t, r->regcache);
6421 static struct notif_event *
6422 remote_notif_stop_alloc_reply (void)
6424 /* We cast to a pointer to the "base class". */
6425 struct notif_event *r = (struct notif_event *) XNEW (struct stop_reply);
6427 r->dtr = stop_reply_dtr;
6432 /* A client of notification Stop. */
6434 struct notif_client notif_client_stop =
6438 remote_notif_stop_parse,
6439 remote_notif_stop_ack,
6440 remote_notif_stop_can_get_pending_events,
6441 remote_notif_stop_alloc_reply,
6445 /* A parameter to pass data in and out. */
6447 struct queue_iter_param
6450 struct stop_reply *output;
6453 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6454 the pid of the process that owns the threads we want to check, or
6455 -1 if we want to check all threads. */
6458 is_pending_fork_parent (struct target_waitstatus *ws, int event_pid,
6461 if (ws->kind == TARGET_WAITKIND_FORKED
6462 || ws->kind == TARGET_WAITKIND_VFORKED)
6464 if (event_pid == -1 || event_pid == ptid_get_pid (thread_ptid))
6471 /* Return the thread's pending status used to determine whether the
6472 thread is a fork parent stopped at a fork event. */
6474 static struct target_waitstatus *
6475 thread_pending_fork_status (struct thread_info *thread)
6477 if (thread->suspend.waitstatus_pending_p)
6478 return &thread->suspend.waitstatus;
6480 return &thread->pending_follow;
6483 /* Determine if THREAD is a pending fork parent thread. */
6486 is_pending_fork_parent_thread (struct thread_info *thread)
6488 struct target_waitstatus *ws = thread_pending_fork_status (thread);
6491 return is_pending_fork_parent (ws, pid, thread->ptid);
6494 /* Check whether EVENT is a fork event, and if it is, remove the
6495 fork child from the context list passed in DATA. */
6498 remove_child_of_pending_fork (QUEUE (stop_reply_p) *q,
6499 QUEUE_ITER (stop_reply_p) *iter,
6503 struct queue_iter_param *param = (struct queue_iter_param *) data;
6504 struct threads_listing_context *context
6505 = (struct threads_listing_context *) param->input;
6507 if (event->ws.kind == TARGET_WAITKIND_FORKED
6508 || event->ws.kind == TARGET_WAITKIND_VFORKED
6509 || event->ws.kind == TARGET_WAITKIND_THREAD_EXITED)
6510 threads_listing_context_remove (&event->ws, context);
6515 /* If CONTEXT contains any fork child threads that have not been
6516 reported yet, remove them from the CONTEXT list. If such a
6517 thread exists it is because we are stopped at a fork catchpoint
6518 and have not yet called follow_fork, which will set up the
6519 host-side data structures for the new process. */
6522 remove_new_fork_children (struct threads_listing_context *context)
6524 struct thread_info * thread;
6526 struct notif_client *notif = ¬if_client_stop;
6527 struct queue_iter_param param;
6529 /* For any threads stopped at a fork event, remove the corresponding
6530 fork child threads from the CONTEXT list. */
6531 ALL_NON_EXITED_THREADS (thread)
6533 struct target_waitstatus *ws = thread_pending_fork_status (thread);
6535 if (is_pending_fork_parent (ws, pid, thread->ptid))
6537 threads_listing_context_remove (ws, context);
6541 /* Check for any pending fork events (not reported or processed yet)
6542 in process PID and remove those fork child threads from the
6543 CONTEXT list as well. */
6544 remote_notif_get_pending_events (notif);
6545 param.input = context;
6546 param.output = NULL;
6547 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6548 remove_child_of_pending_fork, ¶m);
6551 /* Check whether EVENT would prevent a global or process wildcard
6555 check_pending_event_prevents_wildcard_vcont_callback
6556 (QUEUE (stop_reply_p) *q,
6557 QUEUE_ITER (stop_reply_p) *iter,
6561 struct inferior *inf;
6562 int *may_global_wildcard_vcont = (int *) data;
6564 if (event->ws.kind == TARGET_WAITKIND_NO_RESUMED
6565 || event->ws.kind == TARGET_WAITKIND_NO_HISTORY)
6568 if (event->ws.kind == TARGET_WAITKIND_FORKED
6569 || event->ws.kind == TARGET_WAITKIND_VFORKED)
6570 *may_global_wildcard_vcont = 0;
6572 inf = find_inferior_ptid (event->ptid);
6574 /* This may be the first time we heard about this process.
6575 Regardless, we must not do a global wildcard resume, otherwise
6576 we'd resume this process too. */
6577 *may_global_wildcard_vcont = 0;
6579 inf->priv->may_wildcard_vcont = 0;
6584 /* Check whether any event pending in the vStopped queue would prevent
6585 a global or process wildcard vCont action. Clear
6586 *may_global_wildcard if we can't do a global wildcard (vCont;c),
6587 and clear the event inferior's may_wildcard_vcont flag if we can't
6588 do a process-wide wildcard resume (vCont;c:pPID.-1). */
6591 check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard)
6593 struct notif_client *notif = ¬if_client_stop;
6595 remote_notif_get_pending_events (notif);
6596 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6597 check_pending_event_prevents_wildcard_vcont_callback,
6598 may_global_wildcard);
6601 /* Remove stop replies in the queue if its pid is equal to the given
6605 remove_stop_reply_for_inferior (QUEUE (stop_reply_p) *q,
6606 QUEUE_ITER (stop_reply_p) *iter,
6610 struct queue_iter_param *param = (struct queue_iter_param *) data;
6611 struct inferior *inf = (struct inferior *) param->input;
6613 if (ptid_get_pid (event->ptid) == inf->pid)
6615 stop_reply_xfree (event);
6616 QUEUE_remove_elem (stop_reply_p, q, iter);
6622 /* Discard all pending stop replies of inferior INF. */
6625 discard_pending_stop_replies (struct inferior *inf)
6627 struct queue_iter_param param;
6628 struct stop_reply *reply;
6629 struct remote_state *rs = get_remote_state ();
6630 struct remote_notif_state *rns = rs->notif_state;
6632 /* This function can be notified when an inferior exists. When the
6633 target is not remote, the notification state is NULL. */
6634 if (rs->remote_desc == NULL)
6637 reply = (struct stop_reply *) rns->pending_event[notif_client_stop.id];
6639 /* Discard the in-flight notification. */
6640 if (reply != NULL && ptid_get_pid (reply->ptid) == inf->pid)
6642 stop_reply_xfree (reply);
6643 rns->pending_event[notif_client_stop.id] = NULL;
6647 param.output = NULL;
6648 /* Discard the stop replies we have already pulled with
6650 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6651 remove_stop_reply_for_inferior, ¶m);
6654 /* If its remote state is equal to the given remote state,
6655 remove EVENT from the stop reply queue. */
6658 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p) *q,
6659 QUEUE_ITER (stop_reply_p) *iter,
6663 struct queue_iter_param *param = (struct queue_iter_param *) data;
6664 struct remote_state *rs = (struct remote_state *) param->input;
6666 if (event->rs == rs)
6668 stop_reply_xfree (event);
6669 QUEUE_remove_elem (stop_reply_p, q, iter);
6675 /* Discard the stop replies for RS in stop_reply_queue. */
6678 discard_pending_stop_replies_in_queue (struct remote_state *rs)
6680 struct queue_iter_param param;
6683 param.output = NULL;
6684 /* Discard the stop replies we have already pulled with
6686 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6687 remove_stop_reply_of_remote_state, ¶m);
6690 /* A parameter to pass data in and out. */
6693 remote_notif_remove_once_on_match (QUEUE (stop_reply_p) *q,
6694 QUEUE_ITER (stop_reply_p) *iter,
6698 struct queue_iter_param *param = (struct queue_iter_param *) data;
6699 ptid_t *ptid = (ptid_t *) param->input;
6701 if (ptid_match (event->ptid, *ptid))
6703 param->output = event;
6704 QUEUE_remove_elem (stop_reply_p, q, iter);
6711 /* Remove the first reply in 'stop_reply_queue' which matches
6714 static struct stop_reply *
6715 remote_notif_remove_queued_reply (ptid_t ptid)
6717 struct queue_iter_param param;
6719 param.input = &ptid;
6720 param.output = NULL;
6722 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6723 remote_notif_remove_once_on_match, ¶m);
6725 fprintf_unfiltered (gdb_stdlog,
6726 "notif: discard queued event: 'Stop' in %s\n",
6727 target_pid_to_str (ptid));
6729 return param.output;
6732 /* Look for a queued stop reply belonging to PTID. If one is found,
6733 remove it from the queue, and return it. Returns NULL if none is
6734 found. If there are still queued events left to process, tell the
6735 event loop to get back to target_wait soon. */
6737 static struct stop_reply *
6738 queued_stop_reply (ptid_t ptid)
6740 struct stop_reply *r = remote_notif_remove_queued_reply (ptid);
6742 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
6743 /* There's still at least an event left. */
6744 mark_async_event_handler (remote_async_inferior_event_token);
6749 /* Push a fully parsed stop reply in the stop reply queue. Since we
6750 know that we now have at least one queued event left to pass to the
6751 core side, tell the event loop to get back to target_wait soon. */
6754 push_stop_reply (struct stop_reply *new_event)
6756 QUEUE_enque (stop_reply_p, stop_reply_queue, new_event);
6759 fprintf_unfiltered (gdb_stdlog,
6760 "notif: push 'Stop' %s to queue %d\n",
6761 target_pid_to_str (new_event->ptid),
6762 QUEUE_length (stop_reply_p,
6765 mark_async_event_handler (remote_async_inferior_event_token);
6769 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p) *q,
6770 QUEUE_ITER (stop_reply_p) *iter,
6771 struct stop_reply *event,
6774 ptid_t *ptid = (ptid_t *) data;
6776 return !(ptid_equal (*ptid, event->ptid)
6777 && event->ws.kind == TARGET_WAITKIND_STOPPED);
6780 /* Returns true if we have a stop reply for PTID. */
6783 peek_stop_reply (ptid_t ptid)
6785 return !QUEUE_iterate (stop_reply_p, stop_reply_queue,
6786 stop_reply_match_ptid_and_ws, &ptid);
6789 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6790 starting with P and ending with PEND matches PREFIX. */
6793 strprefix (const char *p, const char *pend, const char *prefix)
6795 for ( ; p < pend; p++, prefix++)
6798 return *prefix == '\0';
6801 /* Parse the stop reply in BUF. Either the function succeeds, and the
6802 result is stored in EVENT, or throws an error. */
6805 remote_parse_stop_reply (char *buf, struct stop_reply *event)
6807 struct remote_arch_state *rsa = get_remote_arch_state ();
6812 event->ptid = null_ptid;
6813 event->rs = get_remote_state ();
6814 event->ws.kind = TARGET_WAITKIND_IGNORE;
6815 event->ws.value.integer = 0;
6816 event->stop_reason = TARGET_STOPPED_BY_NO_REASON;
6817 event->regcache = NULL;
6822 case 'T': /* Status with PC, SP, FP, ... */
6823 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6824 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6826 n... = register number
6827 r... = register contents
6830 p = &buf[3]; /* after Txx */
6836 p1 = strchr (p, ':');
6838 error (_("Malformed packet(a) (missing colon): %s\n\
6842 error (_("Malformed packet(a) (missing register number): %s\n\
6846 /* Some "registers" are actually extended stop information.
6847 Note if you're adding a new entry here: GDB 7.9 and
6848 earlier assume that all register "numbers" that start
6849 with an hex digit are real register numbers. Make sure
6850 the server only sends such a packet if it knows the
6851 client understands it. */
6853 if (strprefix (p, p1, "thread"))
6854 event->ptid = read_ptid (++p1, &p);
6855 else if (strprefix (p, p1, "syscall_entry"))
6859 event->ws.kind = TARGET_WAITKIND_SYSCALL_ENTRY;
6860 p = unpack_varlen_hex (++p1, &sysno);
6861 event->ws.value.syscall_number = (int) sysno;
6863 else if (strprefix (p, p1, "syscall_return"))
6867 event->ws.kind = TARGET_WAITKIND_SYSCALL_RETURN;
6868 p = unpack_varlen_hex (++p1, &sysno);
6869 event->ws.value.syscall_number = (int) sysno;
6871 else if (strprefix (p, p1, "watch")
6872 || strprefix (p, p1, "rwatch")
6873 || strprefix (p, p1, "awatch"))
6875 event->stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
6876 p = unpack_varlen_hex (++p1, &addr);
6877 event->watch_data_address = (CORE_ADDR) addr;
6879 else if (strprefix (p, p1, "swbreak"))
6881 event->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT;
6883 /* Make sure the stub doesn't forget to indicate support
6885 if (packet_support (PACKET_swbreak_feature) != PACKET_ENABLE)
6886 error (_("Unexpected swbreak stop reason"));
6888 /* The value part is documented as "must be empty",
6889 though we ignore it, in case we ever decide to make
6890 use of it in a backward compatible way. */
6891 p = strchrnul (p1 + 1, ';');
6893 else if (strprefix (p, p1, "hwbreak"))
6895 event->stop_reason = TARGET_STOPPED_BY_HW_BREAKPOINT;
6897 /* Make sure the stub doesn't forget to indicate support
6899 if (packet_support (PACKET_hwbreak_feature) != PACKET_ENABLE)
6900 error (_("Unexpected hwbreak stop reason"));
6903 p = strchrnul (p1 + 1, ';');
6905 else if (strprefix (p, p1, "library"))
6907 event->ws.kind = TARGET_WAITKIND_LOADED;
6908 p = strchrnul (p1 + 1, ';');
6910 else if (strprefix (p, p1, "replaylog"))
6912 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
6913 /* p1 will indicate "begin" or "end", but it makes
6914 no difference for now, so ignore it. */
6915 p = strchrnul (p1 + 1, ';');
6917 else if (strprefix (p, p1, "core"))
6921 p = unpack_varlen_hex (++p1, &c);
6924 else if (strprefix (p, p1, "fork"))
6926 event->ws.value.related_pid = read_ptid (++p1, &p);
6927 event->ws.kind = TARGET_WAITKIND_FORKED;
6929 else if (strprefix (p, p1, "vfork"))
6931 event->ws.value.related_pid = read_ptid (++p1, &p);
6932 event->ws.kind = TARGET_WAITKIND_VFORKED;
6934 else if (strprefix (p, p1, "vforkdone"))
6936 event->ws.kind = TARGET_WAITKIND_VFORK_DONE;
6937 p = strchrnul (p1 + 1, ';');
6939 else if (strprefix (p, p1, "exec"))
6942 char pathname[PATH_MAX];
6945 /* Determine the length of the execd pathname. */
6946 p = unpack_varlen_hex (++p1, &ignored);
6947 pathlen = (p - p1) / 2;
6949 /* Save the pathname for event reporting and for
6950 the next run command. */
6951 hex2bin (p1, (gdb_byte *) pathname, pathlen);
6952 pathname[pathlen] = '\0';
6954 /* This is freed during event handling. */
6955 event->ws.value.execd_pathname = xstrdup (pathname);
6956 event->ws.kind = TARGET_WAITKIND_EXECD;
6958 /* Skip the registers included in this packet, since
6959 they may be for an architecture different from the
6960 one used by the original program. */
6963 else if (strprefix (p, p1, "create"))
6965 event->ws.kind = TARGET_WAITKIND_THREAD_CREATED;
6966 p = strchrnul (p1 + 1, ';');
6975 p = strchrnul (p1 + 1, ';');
6980 /* Maybe a real ``P'' register number. */
6981 p_temp = unpack_varlen_hex (p, &pnum);
6982 /* If the first invalid character is the colon, we got a
6983 register number. Otherwise, it's an unknown stop
6987 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
6988 cached_reg_t cached_reg;
6989 struct gdbarch *gdbarch = target_gdbarch ();
6992 error (_("Remote sent bad register number %s: %s\n\
6994 hex_string (pnum), p, buf);
6996 cached_reg.num = reg->regnum;
6997 cached_reg.data = (gdb_byte *)
6998 xmalloc (register_size (gdbarch, reg->regnum));
7001 fieldsize = hex2bin (p, cached_reg.data,
7002 register_size (gdbarch, reg->regnum));
7004 if (fieldsize < register_size (gdbarch, reg->regnum))
7005 warning (_("Remote reply is too short: %s"), buf);
7007 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
7011 /* Not a number. Silently skip unknown optional
7013 p = strchrnul (p1 + 1, ';');
7018 error (_("Remote register badly formatted: %s\nhere: %s"),
7023 if (event->ws.kind != TARGET_WAITKIND_IGNORE)
7027 case 'S': /* Old style status, just signal only. */
7031 event->ws.kind = TARGET_WAITKIND_STOPPED;
7032 sig = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
7033 if (GDB_SIGNAL_FIRST <= sig && sig < GDB_SIGNAL_LAST)
7034 event->ws.value.sig = (enum gdb_signal) sig;
7036 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
7039 case 'w': /* Thread exited. */
7044 event->ws.kind = TARGET_WAITKIND_THREAD_EXITED;
7045 p = unpack_varlen_hex (&buf[1], &value);
7046 event->ws.value.integer = value;
7048 error (_("stop reply packet badly formatted: %s"), buf);
7049 event->ptid = read_ptid (++p, NULL);
7052 case 'W': /* Target exited. */
7059 /* GDB used to accept only 2 hex chars here. Stubs should
7060 only send more if they detect GDB supports multi-process
7062 p = unpack_varlen_hex (&buf[1], &value);
7066 /* The remote process exited. */
7067 event->ws.kind = TARGET_WAITKIND_EXITED;
7068 event->ws.value.integer = value;
7072 /* The remote process exited with a signal. */
7073 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
7074 if (GDB_SIGNAL_FIRST <= value && value < GDB_SIGNAL_LAST)
7075 event->ws.value.sig = (enum gdb_signal) value;
7077 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
7080 /* If no process is specified, assume inferior_ptid. */
7081 pid = ptid_get_pid (inferior_ptid);
7090 else if (startswith (p, "process:"))
7094 p += sizeof ("process:") - 1;
7095 unpack_varlen_hex (p, &upid);
7099 error (_("unknown stop reply packet: %s"), buf);
7102 error (_("unknown stop reply packet: %s"), buf);
7103 event->ptid = pid_to_ptid (pid);
7107 event->ws.kind = TARGET_WAITKIND_NO_RESUMED;
7108 event->ptid = minus_one_ptid;
7112 if (target_is_non_stop_p () && ptid_equal (event->ptid, null_ptid))
7113 error (_("No process or thread specified in stop reply: %s"), buf);
7116 /* When the stub wants to tell GDB about a new notification reply, it
7117 sends a notification (%Stop, for example). Those can come it at
7118 any time, hence, we have to make sure that any pending
7119 putpkt/getpkt sequence we're making is finished, before querying
7120 the stub for more events with the corresponding ack command
7121 (vStopped, for example). E.g., if we started a vStopped sequence
7122 immediately upon receiving the notification, something like this
7130 1.6) <-- (registers reply to step #1.3)
7132 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7135 To solve this, whenever we parse a %Stop notification successfully,
7136 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7137 doing whatever we were doing:
7143 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7144 2.5) <-- (registers reply to step #2.3)
7146 Eventualy after step #2.5, we return to the event loop, which
7147 notices there's an event on the
7148 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7149 associated callback --- the function below. At this point, we're
7150 always safe to start a vStopped sequence. :
7153 2.7) <-- T05 thread:2
7159 remote_notif_get_pending_events (struct notif_client *nc)
7161 struct remote_state *rs = get_remote_state ();
7163 if (rs->notif_state->pending_event[nc->id] != NULL)
7166 fprintf_unfiltered (gdb_stdlog,
7167 "notif: process: '%s' ack pending event\n",
7171 nc->ack (nc, rs->buf, rs->notif_state->pending_event[nc->id]);
7172 rs->notif_state->pending_event[nc->id] = NULL;
7176 getpkt (&rs->buf, &rs->buf_size, 0);
7177 if (strcmp (rs->buf, "OK") == 0)
7180 remote_notif_ack (nc, rs->buf);
7186 fprintf_unfiltered (gdb_stdlog,
7187 "notif: process: '%s' no pending reply\n",
7192 /* Called when it is decided that STOP_REPLY holds the info of the
7193 event that is to be returned to the core. This function always
7194 destroys STOP_REPLY. */
7197 process_stop_reply (struct stop_reply *stop_reply,
7198 struct target_waitstatus *status)
7202 *status = stop_reply->ws;
7203 ptid = stop_reply->ptid;
7205 /* If no thread/process was reported by the stub, assume the current
7207 if (ptid_equal (ptid, null_ptid))
7208 ptid = inferior_ptid;
7210 if (status->kind != TARGET_WAITKIND_EXITED
7211 && status->kind != TARGET_WAITKIND_SIGNALLED
7212 && status->kind != TARGET_WAITKIND_NO_RESUMED)
7214 struct private_thread_info *remote_thr;
7216 /* Expedited registers. */
7217 if (stop_reply->regcache)
7219 struct regcache *regcache
7220 = get_thread_arch_regcache (ptid, target_gdbarch ());
7225 VEC_iterate (cached_reg_t, stop_reply->regcache, ix, reg);
7228 regcache_raw_supply (regcache, reg->num, reg->data);
7232 VEC_free (cached_reg_t, stop_reply->regcache);
7235 remote_notice_new_inferior (ptid, 0);
7236 remote_thr = get_private_info_ptid (ptid);
7237 remote_thr->core = stop_reply->core;
7238 remote_thr->stop_reason = stop_reply->stop_reason;
7239 remote_thr->watch_data_address = stop_reply->watch_data_address;
7240 remote_thr->vcont_resumed = 0;
7243 stop_reply_xfree (stop_reply);
7247 /* The non-stop mode version of target_wait. */
7250 remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
7252 struct remote_state *rs = get_remote_state ();
7253 struct stop_reply *stop_reply;
7257 /* If in non-stop mode, get out of getpkt even if a
7258 notification is received. */
7260 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
7261 0 /* forever */, &is_notif);
7264 if (ret != -1 && !is_notif)
7267 case 'E': /* Error of some sort. */
7268 /* We're out of sync with the target now. Did it continue
7269 or not? We can't tell which thread it was in non-stop,
7270 so just ignore this. */
7271 warning (_("Remote failure reply: %s"), rs->buf);
7273 case 'O': /* Console output. */
7274 remote_console_output (rs->buf + 1);
7277 warning (_("Invalid remote reply: %s"), rs->buf);
7281 /* Acknowledge a pending stop reply that may have arrived in the
7283 if (rs->notif_state->pending_event[notif_client_stop.id] != NULL)
7284 remote_notif_get_pending_events (¬if_client_stop);
7286 /* If indeed we noticed a stop reply, we're done. */
7287 stop_reply = queued_stop_reply (ptid);
7288 if (stop_reply != NULL)
7289 return process_stop_reply (stop_reply, status);
7291 /* Still no event. If we're just polling for an event, then
7292 return to the event loop. */
7293 if (options & TARGET_WNOHANG)
7295 status->kind = TARGET_WAITKIND_IGNORE;
7296 return minus_one_ptid;
7299 /* Otherwise do a blocking wait. */
7300 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
7301 1 /* forever */, &is_notif);
7305 /* Wait until the remote machine stops, then return, storing status in
7306 STATUS just as `wait' would. */
7309 remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options)
7311 struct remote_state *rs = get_remote_state ();
7312 ptid_t event_ptid = null_ptid;
7314 struct stop_reply *stop_reply;
7318 status->kind = TARGET_WAITKIND_IGNORE;
7319 status->value.integer = 0;
7321 stop_reply = queued_stop_reply (ptid);
7322 if (stop_reply != NULL)
7323 return process_stop_reply (stop_reply, status);
7325 if (rs->cached_wait_status)
7326 /* Use the cached wait status, but only once. */
7327 rs->cached_wait_status = 0;
7332 int forever = ((options & TARGET_WNOHANG) == 0
7333 && wait_forever_enabled_p);
7335 if (!rs->waiting_for_stop_reply)
7337 status->kind = TARGET_WAITKIND_NO_RESUMED;
7338 return minus_one_ptid;
7341 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7342 _never_ wait for ever -> test on target_is_async_p().
7343 However, before we do that we need to ensure that the caller
7344 knows how to take the target into/out of async mode. */
7345 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
7346 forever, &is_notif);
7348 /* GDB gets a notification. Return to core as this event is
7350 if (ret != -1 && is_notif)
7351 return minus_one_ptid;
7353 if (ret == -1 && (options & TARGET_WNOHANG) != 0)
7354 return minus_one_ptid;
7359 /* Assume that the target has acknowledged Ctrl-C unless we receive
7360 an 'F' or 'O' packet. */
7361 if (buf[0] != 'F' && buf[0] != 'O')
7362 rs->ctrlc_pending_p = 0;
7366 case 'E': /* Error of some sort. */
7367 /* We're out of sync with the target now. Did it continue or
7368 not? Not is more likely, so report a stop. */
7369 rs->waiting_for_stop_reply = 0;
7371 warning (_("Remote failure reply: %s"), buf);
7372 status->kind = TARGET_WAITKIND_STOPPED;
7373 status->value.sig = GDB_SIGNAL_0;
7375 case 'F': /* File-I/O request. */
7376 /* GDB may access the inferior memory while handling the File-I/O
7377 request, but we don't want GDB accessing memory while waiting
7378 for a stop reply. See the comments in putpkt_binary. Set
7379 waiting_for_stop_reply to 0 temporarily. */
7380 rs->waiting_for_stop_reply = 0;
7381 remote_fileio_request (buf, rs->ctrlc_pending_p);
7382 rs->ctrlc_pending_p = 0;
7383 /* GDB handled the File-I/O request, and the target is running
7384 again. Keep waiting for events. */
7385 rs->waiting_for_stop_reply = 1;
7387 case 'N': case 'T': case 'S': case 'X': case 'W':
7389 struct stop_reply *stop_reply;
7391 /* There is a stop reply to handle. */
7392 rs->waiting_for_stop_reply = 0;
7395 = (struct stop_reply *) remote_notif_parse (¬if_client_stop,
7398 event_ptid = process_stop_reply (stop_reply, status);
7401 case 'O': /* Console output. */
7402 remote_console_output (buf + 1);
7405 if (rs->last_sent_signal != GDB_SIGNAL_0)
7407 /* Zero length reply means that we tried 'S' or 'C' and the
7408 remote system doesn't support it. */
7409 target_terminal_ours_for_output ();
7411 ("Can't send signals to this remote system. %s not sent.\n",
7412 gdb_signal_to_name (rs->last_sent_signal));
7413 rs->last_sent_signal = GDB_SIGNAL_0;
7414 target_terminal_inferior ();
7416 strcpy (buf, rs->last_sent_step ? "s" : "c");
7420 /* else fallthrough */
7422 warning (_("Invalid remote reply: %s"), buf);
7426 if (status->kind == TARGET_WAITKIND_NO_RESUMED)
7427 return minus_one_ptid;
7428 else if (status->kind == TARGET_WAITKIND_IGNORE)
7430 /* Nothing interesting happened. If we're doing a non-blocking
7431 poll, we're done. Otherwise, go back to waiting. */
7432 if (options & TARGET_WNOHANG)
7433 return minus_one_ptid;
7437 else if (status->kind != TARGET_WAITKIND_EXITED
7438 && status->kind != TARGET_WAITKIND_SIGNALLED)
7440 if (!ptid_equal (event_ptid, null_ptid))
7441 record_currthread (rs, event_ptid);
7443 event_ptid = inferior_ptid;
7446 /* A process exit. Invalidate our notion of current thread. */
7447 record_currthread (rs, minus_one_ptid);
7452 /* Wait until the remote machine stops, then return, storing status in
7453 STATUS just as `wait' would. */
7456 remote_wait (struct target_ops *ops,
7457 ptid_t ptid, struct target_waitstatus *status, int options)
7461 if (target_is_non_stop_p ())
7462 event_ptid = remote_wait_ns (ptid, status, options);
7464 event_ptid = remote_wait_as (ptid, status, options);
7466 if (target_is_async_p ())
7468 /* If there are are events left in the queue tell the event loop
7470 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
7471 mark_async_event_handler (remote_async_inferior_event_token);
7477 /* Fetch a single register using a 'p' packet. */
7480 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
7482 struct gdbarch *gdbarch = get_regcache_arch (regcache);
7483 struct remote_state *rs = get_remote_state ();
7485 gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum));
7488 if (packet_support (PACKET_p) == PACKET_DISABLE)
7491 if (reg->pnum == -1)
7496 p += hexnumstr (p, reg->pnum);
7499 getpkt (&rs->buf, &rs->buf_size, 0);
7503 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
7507 case PACKET_UNKNOWN:
7510 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7511 gdbarch_register_name (get_regcache_arch (regcache),
7516 /* If this register is unfetchable, tell the regcache. */
7519 regcache_raw_supply (regcache, reg->regnum, NULL);
7523 /* Otherwise, parse and supply the value. */
7529 error (_("fetch_register_using_p: early buf termination"));
7531 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
7534 regcache_raw_supply (regcache, reg->regnum, regp);
7538 /* Fetch the registers included in the target's 'g' packet. */
7541 send_g_packet (void)
7543 struct remote_state *rs = get_remote_state ();
7546 xsnprintf (rs->buf, get_remote_packet_size (), "g");
7547 remote_send (&rs->buf, &rs->buf_size);
7549 /* We can get out of synch in various cases. If the first character
7550 in the buffer is not a hex character, assume that has happened
7551 and try to fetch another packet to read. */
7552 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
7553 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
7554 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
7555 && rs->buf[0] != 'x') /* New: unavailable register value. */
7558 fprintf_unfiltered (gdb_stdlog,
7559 "Bad register packet; fetching a new packet\n");
7560 getpkt (&rs->buf, &rs->buf_size, 0);
7563 buf_len = strlen (rs->buf);
7565 /* Sanity check the received packet. */
7566 if (buf_len % 2 != 0)
7567 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
7573 process_g_packet (struct regcache *regcache)
7575 struct gdbarch *gdbarch = get_regcache_arch (regcache);
7576 struct remote_state *rs = get_remote_state ();
7577 struct remote_arch_state *rsa = get_remote_arch_state ();
7582 buf_len = strlen (rs->buf);
7584 /* Further sanity checks, with knowledge of the architecture. */
7585 if (buf_len > 2 * rsa->sizeof_g_packet)
7586 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
7588 /* Save the size of the packet sent to us by the target. It is used
7589 as a heuristic when determining the max size of packets that the
7590 target can safely receive. */
7591 if (rsa->actual_register_packet_size == 0)
7592 rsa->actual_register_packet_size = buf_len;
7594 /* If this is smaller than we guessed the 'g' packet would be,
7595 update our records. A 'g' reply that doesn't include a register's
7596 value implies either that the register is not available, or that
7597 the 'p' packet must be used. */
7598 if (buf_len < 2 * rsa->sizeof_g_packet)
7600 long sizeof_g_packet = buf_len / 2;
7602 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
7604 long offset = rsa->regs[i].offset;
7605 long reg_size = register_size (gdbarch, i);
7607 if (rsa->regs[i].pnum == -1)
7610 if (offset >= sizeof_g_packet)
7611 rsa->regs[i].in_g_packet = 0;
7612 else if (offset + reg_size > sizeof_g_packet)
7613 error (_("Truncated register %d in remote 'g' packet"), i);
7615 rsa->regs[i].in_g_packet = 1;
7618 /* Looks valid enough, we can assume this is the correct length
7619 for a 'g' packet. It's important not to adjust
7620 rsa->sizeof_g_packet if we have truncated registers otherwise
7621 this "if" won't be run the next time the method is called
7622 with a packet of the same size and one of the internal errors
7623 below will trigger instead. */
7624 rsa->sizeof_g_packet = sizeof_g_packet;
7627 regs = (char *) alloca (rsa->sizeof_g_packet);
7629 /* Unimplemented registers read as all bits zero. */
7630 memset (regs, 0, rsa->sizeof_g_packet);
7632 /* Reply describes registers byte by byte, each byte encoded as two
7633 hex characters. Suck them all up, then supply them to the
7634 register cacheing/storage mechanism. */
7637 for (i = 0; i < rsa->sizeof_g_packet; i++)
7639 if (p[0] == 0 || p[1] == 0)
7640 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7641 internal_error (__FILE__, __LINE__,
7642 _("unexpected end of 'g' packet reply"));
7644 if (p[0] == 'x' && p[1] == 'x')
7645 regs[i] = 0; /* 'x' */
7647 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
7651 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
7653 struct packet_reg *r = &rsa->regs[i];
7654 long reg_size = register_size (gdbarch, i);
7658 if ((r->offset + reg_size) * 2 > strlen (rs->buf))
7659 /* This shouldn't happen - we adjusted in_g_packet above. */
7660 internal_error (__FILE__, __LINE__,
7661 _("unexpected end of 'g' packet reply"));
7662 else if (rs->buf[r->offset * 2] == 'x')
7664 gdb_assert (r->offset * 2 < strlen (rs->buf));
7665 /* The register isn't available, mark it as such (at
7666 the same time setting the value to zero). */
7667 regcache_raw_supply (regcache, r->regnum, NULL);
7670 regcache_raw_supply (regcache, r->regnum,
7677 fetch_registers_using_g (struct regcache *regcache)
7680 process_g_packet (regcache);
7683 /* Make the remote selected traceframe match GDB's selected
7687 set_remote_traceframe (void)
7690 struct remote_state *rs = get_remote_state ();
7692 if (rs->remote_traceframe_number == get_traceframe_number ())
7695 /* Avoid recursion, remote_trace_find calls us again. */
7696 rs->remote_traceframe_number = get_traceframe_number ();
7698 newnum = target_trace_find (tfind_number,
7699 get_traceframe_number (), 0, 0, NULL);
7701 /* Should not happen. If it does, all bets are off. */
7702 if (newnum != get_traceframe_number ())
7703 warning (_("could not set remote traceframe"));
7707 remote_fetch_registers (struct target_ops *ops,
7708 struct regcache *regcache, int regnum)
7710 struct remote_arch_state *rsa = get_remote_arch_state ();
7713 set_remote_traceframe ();
7714 set_general_thread (regcache_get_ptid (regcache));
7718 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
7720 gdb_assert (reg != NULL);
7722 /* If this register might be in the 'g' packet, try that first -
7723 we are likely to read more than one register. If this is the
7724 first 'g' packet, we might be overly optimistic about its
7725 contents, so fall back to 'p'. */
7726 if (reg->in_g_packet)
7728 fetch_registers_using_g (regcache);
7729 if (reg->in_g_packet)
7733 if (fetch_register_using_p (regcache, reg))
7736 /* This register is not available. */
7737 regcache_raw_supply (regcache, reg->regnum, NULL);
7742 fetch_registers_using_g (regcache);
7744 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7745 if (!rsa->regs[i].in_g_packet)
7746 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
7748 /* This register is not available. */
7749 regcache_raw_supply (regcache, i, NULL);
7753 /* Prepare to store registers. Since we may send them all (using a
7754 'G' request), we have to read out the ones we don't want to change
7758 remote_prepare_to_store (struct target_ops *self, struct regcache *regcache)
7760 struct remote_arch_state *rsa = get_remote_arch_state ();
7763 /* Make sure the entire registers array is valid. */
7764 switch (packet_support (PACKET_P))
7766 case PACKET_DISABLE:
7767 case PACKET_SUPPORT_UNKNOWN:
7768 /* Make sure all the necessary registers are cached. */
7769 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7770 if (rsa->regs[i].in_g_packet)
7771 regcache_raw_update (regcache, rsa->regs[i].regnum);
7778 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7779 packet was not recognized. */
7782 store_register_using_P (const struct regcache *regcache,
7783 struct packet_reg *reg)
7785 struct gdbarch *gdbarch = get_regcache_arch (regcache);
7786 struct remote_state *rs = get_remote_state ();
7787 /* Try storing a single register. */
7788 char *buf = rs->buf;
7789 gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum));
7792 if (packet_support (PACKET_P) == PACKET_DISABLE)
7795 if (reg->pnum == -1)
7798 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
7799 p = buf + strlen (buf);
7800 regcache_raw_collect (regcache, reg->regnum, regp);
7801 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
7803 getpkt (&rs->buf, &rs->buf_size, 0);
7805 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
7810 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7811 gdbarch_register_name (gdbarch, reg->regnum), rs->buf);
7812 case PACKET_UNKNOWN:
7815 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
7819 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7820 contents of the register cache buffer. FIXME: ignores errors. */
7823 store_registers_using_G (const struct regcache *regcache)
7825 struct remote_state *rs = get_remote_state ();
7826 struct remote_arch_state *rsa = get_remote_arch_state ();
7830 /* Extract all the registers in the regcache copying them into a
7835 regs = (gdb_byte *) alloca (rsa->sizeof_g_packet);
7836 memset (regs, 0, rsa->sizeof_g_packet);
7837 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7839 struct packet_reg *r = &rsa->regs[i];
7842 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
7846 /* Command describes registers byte by byte,
7847 each byte encoded as two hex characters. */
7850 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
7852 bin2hex (regs, p, rsa->sizeof_g_packet);
7854 getpkt (&rs->buf, &rs->buf_size, 0);
7855 if (packet_check_result (rs->buf) == PACKET_ERROR)
7856 error (_("Could not write registers; remote failure reply '%s'"),
7860 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7861 of the register cache buffer. FIXME: ignores errors. */
7864 remote_store_registers (struct target_ops *ops,
7865 struct regcache *regcache, int regnum)
7867 struct remote_arch_state *rsa = get_remote_arch_state ();
7870 set_remote_traceframe ();
7871 set_general_thread (regcache_get_ptid (regcache));
7875 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
7877 gdb_assert (reg != NULL);
7879 /* Always prefer to store registers using the 'P' packet if
7880 possible; we often change only a small number of registers.
7881 Sometimes we change a larger number; we'd need help from a
7882 higher layer to know to use 'G'. */
7883 if (store_register_using_P (regcache, reg))
7886 /* For now, don't complain if we have no way to write the
7887 register. GDB loses track of unavailable registers too
7888 easily. Some day, this may be an error. We don't have
7889 any way to read the register, either... */
7890 if (!reg->in_g_packet)
7893 store_registers_using_G (regcache);
7897 store_registers_using_G (regcache);
7899 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7900 if (!rsa->regs[i].in_g_packet)
7901 if (!store_register_using_P (regcache, &rsa->regs[i]))
7902 /* See above for why we do not issue an error here. */
7907 /* Return the number of hex digits in num. */
7910 hexnumlen (ULONGEST num)
7914 for (i = 0; num != 0; i++)
7917 return std::max (i, 1);
7920 /* Set BUF to the minimum number of hex digits representing NUM. */
7923 hexnumstr (char *buf, ULONGEST num)
7925 int len = hexnumlen (num);
7927 return hexnumnstr (buf, num, len);
7931 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7934 hexnumnstr (char *buf, ULONGEST num, int width)
7940 for (i = width - 1; i >= 0; i--)
7942 buf[i] = "0123456789abcdef"[(num & 0xf)];
7949 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7952 remote_address_masked (CORE_ADDR addr)
7954 unsigned int address_size = remote_address_size;
7956 /* If "remoteaddresssize" was not set, default to target address size. */
7958 address_size = gdbarch_addr_bit (target_gdbarch ());
7960 if (address_size > 0
7961 && address_size < (sizeof (ULONGEST) * 8))
7963 /* Only create a mask when that mask can safely be constructed
7964 in a ULONGEST variable. */
7967 mask = (mask << address_size) - 1;
7973 /* Determine whether the remote target supports binary downloading.
7974 This is accomplished by sending a no-op memory write of zero length
7975 to the target at the specified address. It does not suffice to send
7976 the whole packet, since many stubs strip the eighth bit and
7977 subsequently compute a wrong checksum, which causes real havoc with
7980 NOTE: This can still lose if the serial line is not eight-bit
7981 clean. In cases like this, the user should clear "remote
7985 check_binary_download (CORE_ADDR addr)
7987 struct remote_state *rs = get_remote_state ();
7989 switch (packet_support (PACKET_X))
7991 case PACKET_DISABLE:
7995 case PACKET_SUPPORT_UNKNOWN:
8001 p += hexnumstr (p, (ULONGEST) addr);
8003 p += hexnumstr (p, (ULONGEST) 0);
8007 putpkt_binary (rs->buf, (int) (p - rs->buf));
8008 getpkt (&rs->buf, &rs->buf_size, 0);
8010 if (rs->buf[0] == '\0')
8013 fprintf_unfiltered (gdb_stdlog,
8014 "binary downloading NOT "
8015 "supported by target\n");
8016 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
8021 fprintf_unfiltered (gdb_stdlog,
8022 "binary downloading supported by target\n");
8023 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
8030 /* Helper function to resize the payload in order to try to get a good
8031 alignment. We try to write an amount of data such that the next write will
8032 start on an address aligned on REMOTE_ALIGN_WRITES. */
8035 align_for_efficient_write (int todo, CORE_ADDR memaddr)
8037 return ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
8040 /* Write memory data directly to the remote machine.
8041 This does not inform the data cache; the data cache uses this.
8042 HEADER is the starting part of the packet.
8043 MEMADDR is the address in the remote memory space.
8044 MYADDR is the address of the buffer in our space.
8045 LEN_UNITS is the number of addressable units to write.
8046 UNIT_SIZE is the length in bytes of an addressable unit.
8047 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8048 should send data as binary ('X'), or hex-encoded ('M').
8050 The function creates packet of the form
8051 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8053 where encoding of <DATA> is terminated by PACKET_FORMAT.
8055 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8058 Return the transferred status, error or OK (an
8059 'enum target_xfer_status' value). Save the number of addressable units
8060 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8062 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8063 exchange between gdb and the stub could look like (?? in place of the
8069 -> $M1000,3:eeeeffffeeee#??
8073 <- eeeeffffeeeedddd */
8075 static enum target_xfer_status
8076 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
8077 const gdb_byte *myaddr, ULONGEST len_units,
8078 int unit_size, ULONGEST *xfered_len_units,
8079 char packet_format, int use_length)
8081 struct remote_state *rs = get_remote_state ();
8087 int payload_capacity_bytes;
8088 int payload_length_bytes;
8090 if (packet_format != 'X' && packet_format != 'M')
8091 internal_error (__FILE__, __LINE__,
8092 _("remote_write_bytes_aux: bad packet format"));
8095 return TARGET_XFER_EOF;
8097 payload_capacity_bytes = get_memory_write_packet_size ();
8099 /* The packet buffer will be large enough for the payload;
8100 get_memory_packet_size ensures this. */
8103 /* Compute the size of the actual payload by subtracting out the
8104 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8106 payload_capacity_bytes -= strlen ("$,:#NN");
8108 /* The comma won't be used. */
8109 payload_capacity_bytes += 1;
8110 payload_capacity_bytes -= strlen (header);
8111 payload_capacity_bytes -= hexnumlen (memaddr);
8113 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8115 strcat (rs->buf, header);
8116 p = rs->buf + strlen (header);
8118 /* Compute a best guess of the number of bytes actually transfered. */
8119 if (packet_format == 'X')
8121 /* Best guess at number of bytes that will fit. */
8122 todo_units = std::min (len_units,
8123 (ULONGEST) payload_capacity_bytes / unit_size);
8125 payload_capacity_bytes -= hexnumlen (todo_units);
8126 todo_units = std::min (todo_units, payload_capacity_bytes / unit_size);
8130 /* Number of bytes that will fit. */
8132 = std::min (len_units,
8133 (ULONGEST) (payload_capacity_bytes / unit_size) / 2);
8135 payload_capacity_bytes -= hexnumlen (todo_units);
8136 todo_units = std::min (todo_units,
8137 (payload_capacity_bytes / unit_size) / 2);
8140 if (todo_units <= 0)
8141 internal_error (__FILE__, __LINE__,
8142 _("minimum packet size too small to write data"));
8144 /* If we already need another packet, then try to align the end
8145 of this packet to a useful boundary. */
8146 if (todo_units > 2 * REMOTE_ALIGN_WRITES && todo_units < len_units)
8147 todo_units = align_for_efficient_write (todo_units, memaddr);
8149 /* Append "<memaddr>". */
8150 memaddr = remote_address_masked (memaddr);
8151 p += hexnumstr (p, (ULONGEST) memaddr);
8158 /* Append the length and retain its location and size. It may need to be
8159 adjusted once the packet body has been created. */
8161 plenlen = hexnumstr (p, (ULONGEST) todo_units);
8169 /* Append the packet body. */
8170 if (packet_format == 'X')
8172 /* Binary mode. Send target system values byte by byte, in
8173 increasing byte addresses. Only escape certain critical
8175 payload_length_bytes =
8176 remote_escape_output (myaddr, todo_units, unit_size, (gdb_byte *) p,
8177 &units_written, payload_capacity_bytes);
8179 /* If not all TODO units fit, then we'll need another packet. Make
8180 a second try to keep the end of the packet aligned. Don't do
8181 this if the packet is tiny. */
8182 if (units_written < todo_units && units_written > 2 * REMOTE_ALIGN_WRITES)
8186 new_todo_units = align_for_efficient_write (units_written, memaddr);
8188 if (new_todo_units != units_written)
8189 payload_length_bytes =
8190 remote_escape_output (myaddr, new_todo_units, unit_size,
8191 (gdb_byte *) p, &units_written,
8192 payload_capacity_bytes);
8195 p += payload_length_bytes;
8196 if (use_length && units_written < todo_units)
8198 /* Escape chars have filled up the buffer prematurely,
8199 and we have actually sent fewer units than planned.
8200 Fix-up the length field of the packet. Use the same
8201 number of characters as before. */
8202 plen += hexnumnstr (plen, (ULONGEST) units_written,
8204 *plen = ':'; /* overwrite \0 from hexnumnstr() */
8209 /* Normal mode: Send target system values byte by byte, in
8210 increasing byte addresses. Each byte is encoded as a two hex
8212 p += 2 * bin2hex (myaddr, p, todo_units * unit_size);
8213 units_written = todo_units;
8216 putpkt_binary (rs->buf, (int) (p - rs->buf));
8217 getpkt (&rs->buf, &rs->buf_size, 0);
8219 if (rs->buf[0] == 'E')
8220 return TARGET_XFER_E_IO;
8222 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8223 send fewer units than we'd planned. */
8224 *xfered_len_units = (ULONGEST) units_written;
8225 return TARGET_XFER_OK;
8228 /* Write memory data directly to the remote machine.
8229 This does not inform the data cache; the data cache uses this.
8230 MEMADDR is the address in the remote memory space.
8231 MYADDR is the address of the buffer in our space.
8232 LEN is the number of bytes.
8234 Return the transferred status, error or OK (an
8235 'enum target_xfer_status' value). Save the number of bytes
8236 transferred in *XFERED_LEN. Only transfer a single packet. */
8238 static enum target_xfer_status
8239 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, ULONGEST len,
8240 int unit_size, ULONGEST *xfered_len)
8242 const char *packet_format = NULL;
8244 /* Check whether the target supports binary download. */
8245 check_binary_download (memaddr);
8247 switch (packet_support (PACKET_X))
8250 packet_format = "X";
8252 case PACKET_DISABLE:
8253 packet_format = "M";
8255 case PACKET_SUPPORT_UNKNOWN:
8256 internal_error (__FILE__, __LINE__,
8257 _("remote_write_bytes: bad internal state"));
8259 internal_error (__FILE__, __LINE__, _("bad switch"));
8262 return remote_write_bytes_aux (packet_format,
8263 memaddr, myaddr, len, unit_size, xfered_len,
8264 packet_format[0], 1);
8267 /* Read memory data directly from the remote machine.
8268 This does not use the data cache; the data cache uses this.
8269 MEMADDR is the address in the remote memory space.
8270 MYADDR is the address of the buffer in our space.
8271 LEN_UNITS is the number of addressable memory units to read..
8272 UNIT_SIZE is the length in bytes of an addressable unit.
8274 Return the transferred status, error or OK (an
8275 'enum target_xfer_status' value). Save the number of bytes
8276 transferred in *XFERED_LEN_UNITS.
8278 See the comment of remote_write_bytes_aux for an example of
8279 memory read/write exchange between gdb and the stub. */
8281 static enum target_xfer_status
8282 remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr, ULONGEST len_units,
8283 int unit_size, ULONGEST *xfered_len_units)
8285 struct remote_state *rs = get_remote_state ();
8286 int buf_size_bytes; /* Max size of packet output buffer. */
8291 buf_size_bytes = get_memory_read_packet_size ();
8292 /* The packet buffer will be large enough for the payload;
8293 get_memory_packet_size ensures this. */
8295 /* Number of units that will fit. */
8296 todo_units = std::min (len_units,
8297 (ULONGEST) (buf_size_bytes / unit_size) / 2);
8299 /* Construct "m"<memaddr>","<len>". */
8300 memaddr = remote_address_masked (memaddr);
8303 p += hexnumstr (p, (ULONGEST) memaddr);
8305 p += hexnumstr (p, (ULONGEST) todo_units);
8308 getpkt (&rs->buf, &rs->buf_size, 0);
8309 if (rs->buf[0] == 'E'
8310 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
8311 && rs->buf[3] == '\0')
8312 return TARGET_XFER_E_IO;
8313 /* Reply describes memory byte by byte, each byte encoded as two hex
8316 decoded_bytes = hex2bin (p, myaddr, todo_units * unit_size);
8317 /* Return what we have. Let higher layers handle partial reads. */
8318 *xfered_len_units = (ULONGEST) (decoded_bytes / unit_size);
8319 return TARGET_XFER_OK;
8322 /* Using the set of read-only target sections of remote, read live
8325 For interface/parameters/return description see target.h,
8328 static enum target_xfer_status
8329 remote_xfer_live_readonly_partial (struct target_ops *ops, gdb_byte *readbuf,
8330 ULONGEST memaddr, ULONGEST len,
8331 int unit_size, ULONGEST *xfered_len)
8333 struct target_section *secp;
8334 struct target_section_table *table;
8336 secp = target_section_by_addr (ops, memaddr);
8338 && (bfd_get_section_flags (secp->the_bfd_section->owner,
8339 secp->the_bfd_section)
8342 struct target_section *p;
8343 ULONGEST memend = memaddr + len;
8345 table = target_get_section_table (ops);
8347 for (p = table->sections; p < table->sections_end; p++)
8349 if (memaddr >= p->addr)
8351 if (memend <= p->endaddr)
8353 /* Entire transfer is within this section. */
8354 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
8357 else if (memaddr >= p->endaddr)
8359 /* This section ends before the transfer starts. */
8364 /* This section overlaps the transfer. Just do half. */
8365 len = p->endaddr - memaddr;
8366 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
8373 return TARGET_XFER_EOF;
8376 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8377 first if the requested memory is unavailable in traceframe.
8378 Otherwise, fall back to remote_read_bytes_1. */
8380 static enum target_xfer_status
8381 remote_read_bytes (struct target_ops *ops, CORE_ADDR memaddr,
8382 gdb_byte *myaddr, ULONGEST len, int unit_size,
8383 ULONGEST *xfered_len)
8386 return TARGET_XFER_EOF;
8388 if (get_traceframe_number () != -1)
8390 VEC(mem_range_s) *available;
8392 /* If we fail to get the set of available memory, then the
8393 target does not support querying traceframe info, and so we
8394 attempt reading from the traceframe anyway (assuming the
8395 target implements the old QTro packet then). */
8396 if (traceframe_available_memory (&available, memaddr, len))
8398 struct cleanup *old_chain;
8400 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
8402 if (VEC_empty (mem_range_s, available)
8403 || VEC_index (mem_range_s, available, 0)->start != memaddr)
8405 enum target_xfer_status res;
8407 /* Don't read into the traceframe's available
8409 if (!VEC_empty (mem_range_s, available))
8411 LONGEST oldlen = len;
8413 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
8414 gdb_assert (len <= oldlen);
8417 do_cleanups (old_chain);
8419 /* This goes through the topmost target again. */
8420 res = remote_xfer_live_readonly_partial (ops, myaddr, memaddr,
8421 len, unit_size, xfered_len);
8422 if (res == TARGET_XFER_OK)
8423 return TARGET_XFER_OK;
8426 /* No use trying further, we know some memory starting
8427 at MEMADDR isn't available. */
8429 return TARGET_XFER_UNAVAILABLE;
8433 /* Don't try to read more than how much is available, in
8434 case the target implements the deprecated QTro packet to
8435 cater for older GDBs (the target's knowledge of read-only
8436 sections may be outdated by now). */
8437 len = VEC_index (mem_range_s, available, 0)->length;
8439 do_cleanups (old_chain);
8443 return remote_read_bytes_1 (memaddr, myaddr, len, unit_size, xfered_len);
8448 /* Sends a packet with content determined by the printf format string
8449 FORMAT and the remaining arguments, then gets the reply. Returns
8450 whether the packet was a success, a failure, or unknown. */
8452 static enum packet_result remote_send_printf (const char *format, ...)
8453 ATTRIBUTE_PRINTF (1, 2);
8455 static enum packet_result
8456 remote_send_printf (const char *format, ...)
8458 struct remote_state *rs = get_remote_state ();
8459 int max_size = get_remote_packet_size ();
8462 va_start (ap, format);
8465 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
8466 internal_error (__FILE__, __LINE__, _("Too long remote packet."));
8468 if (putpkt (rs->buf) < 0)
8469 error (_("Communication problem with target."));
8472 getpkt (&rs->buf, &rs->buf_size, 0);
8474 return packet_check_result (rs->buf);
8478 restore_remote_timeout (void *p)
8480 int value = *(int *)p;
8482 remote_timeout = value;
8485 /* Flash writing can take quite some time. We'll set
8486 effectively infinite timeout for flash operations.
8487 In future, we'll need to decide on a better approach. */
8488 static const int remote_flash_timeout = 1000;
8491 remote_flash_erase (struct target_ops *ops,
8492 ULONGEST address, LONGEST length)
8494 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
8495 int saved_remote_timeout = remote_timeout;
8496 enum packet_result ret;
8497 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
8498 &saved_remote_timeout);
8500 remote_timeout = remote_flash_timeout;
8502 ret = remote_send_printf ("vFlashErase:%s,%s",
8503 phex (address, addr_size),
8507 case PACKET_UNKNOWN:
8508 error (_("Remote target does not support flash erase"));
8510 error (_("Error erasing flash with vFlashErase packet"));
8515 do_cleanups (back_to);
8518 static enum target_xfer_status
8519 remote_flash_write (struct target_ops *ops, ULONGEST address,
8520 ULONGEST length, ULONGEST *xfered_len,
8521 const gdb_byte *data)
8523 int saved_remote_timeout = remote_timeout;
8524 enum target_xfer_status ret;
8525 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
8526 &saved_remote_timeout);
8528 remote_timeout = remote_flash_timeout;
8529 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 1,
8531 do_cleanups (back_to);
8537 remote_flash_done (struct target_ops *ops)
8539 int saved_remote_timeout = remote_timeout;
8541 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
8542 &saved_remote_timeout);
8544 remote_timeout = remote_flash_timeout;
8545 ret = remote_send_printf ("vFlashDone");
8546 do_cleanups (back_to);
8550 case PACKET_UNKNOWN:
8551 error (_("Remote target does not support vFlashDone"));
8553 error (_("Error finishing flash operation"));
8560 remote_files_info (struct target_ops *ignore)
8562 puts_filtered ("Debugging a target over a serial line.\n");
8565 /* Stuff for dealing with the packets which are part of this protocol.
8566 See comment at top of file for details. */
8568 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8569 error to higher layers. Called when a serial error is detected.
8570 The exception message is STRING, followed by a colon and a blank,
8571 the system error message for errno at function entry and final dot
8572 for output compatibility with throw_perror_with_name. */
8575 unpush_and_perror (const char *string)
8577 int saved_errno = errno;
8579 remote_unpush_target ();
8580 throw_error (TARGET_CLOSE_ERROR, "%s: %s.", string,
8581 safe_strerror (saved_errno));
8584 /* Read a single character from the remote end. The current quit
8585 handler is overridden to avoid quitting in the middle of packet
8586 sequence, as that would break communication with the remote server.
8587 See remote_serial_quit_handler for more detail. */
8590 readchar (int timeout)
8593 struct remote_state *rs = get_remote_state ();
8594 struct cleanup *old_chain;
8596 old_chain = make_cleanup_override_quit_handler (remote_serial_quit_handler);
8598 rs->got_ctrlc_during_io = 0;
8600 ch = serial_readchar (rs->remote_desc, timeout);
8602 if (rs->got_ctrlc_during_io)
8605 do_cleanups (old_chain);
8610 switch ((enum serial_rc) ch)
8613 remote_unpush_target ();
8614 throw_error (TARGET_CLOSE_ERROR, _("Remote connection closed"));
8617 unpush_and_perror (_("Remote communication error. "
8618 "Target disconnected."));
8620 case SERIAL_TIMEOUT:
8626 /* Wrapper for serial_write that closes the target and throws if
8627 writing fails. The current quit handler is overridden to avoid
8628 quitting in the middle of packet sequence, as that would break
8629 communication with the remote server. See
8630 remote_serial_quit_handler for more detail. */
8633 remote_serial_write (const char *str, int len)
8635 struct remote_state *rs = get_remote_state ();
8636 struct cleanup *old_chain;
8638 old_chain = make_cleanup_override_quit_handler (remote_serial_quit_handler);
8640 rs->got_ctrlc_during_io = 0;
8642 if (serial_write (rs->remote_desc, str, len))
8644 unpush_and_perror (_("Remote communication error. "
8645 "Target disconnected."));
8648 if (rs->got_ctrlc_during_io)
8651 do_cleanups (old_chain);
8654 /* Send the command in *BUF to the remote machine, and read the reply
8655 into *BUF. Report an error if we get an error reply. Resize
8656 *BUF using xrealloc if necessary to hold the result, and update
8660 remote_send (char **buf,
8664 getpkt (buf, sizeof_buf, 0);
8666 if ((*buf)[0] == 'E')
8667 error (_("Remote failure reply: %s"), *buf);
8670 /* Return a string representing an escaped version of BUF, of len N.
8671 E.g. \n is converted to \\n, \t to \\t, etc. */
8674 escape_buffer (const char *buf, int n)
8678 stb.putstrn (buf, n, '\\');
8679 return std::move (stb.string ());
8682 /* Display a null-terminated packet on stdout, for debugging, using C
8686 print_packet (const char *buf)
8688 puts_filtered ("\"");
8689 fputstr_filtered (buf, '"', gdb_stdout);
8690 puts_filtered ("\"");
8694 putpkt (const char *buf)
8696 return putpkt_binary (buf, strlen (buf));
8699 /* Send a packet to the remote machine, with error checking. The data
8700 of the packet is in BUF. The string in BUF can be at most
8701 get_remote_packet_size () - 5 to account for the $, # and checksum,
8702 and for a possible /0 if we are debugging (remote_debug) and want
8703 to print the sent packet as a string. */
8706 putpkt_binary (const char *buf, int cnt)
8708 struct remote_state *rs = get_remote_state ();
8710 unsigned char csum = 0;
8711 char *buf2 = (char *) xmalloc (cnt + 6);
8712 struct cleanup *old_chain = make_cleanup (xfree, buf2);
8718 /* Catch cases like trying to read memory or listing threads while
8719 we're waiting for a stop reply. The remote server wouldn't be
8720 ready to handle this request, so we'd hang and timeout. We don't
8721 have to worry about this in synchronous mode, because in that
8722 case it's not possible to issue a command while the target is
8723 running. This is not a problem in non-stop mode, because in that
8724 case, the stub is always ready to process serial input. */
8725 if (!target_is_non_stop_p ()
8726 && target_is_async_p ()
8727 && rs->waiting_for_stop_reply)
8729 error (_("Cannot execute this command while the target is running.\n"
8730 "Use the \"interrupt\" command to stop the target\n"
8731 "and then try again."));
8734 /* We're sending out a new packet. Make sure we don't look at a
8735 stale cached response. */
8736 rs->cached_wait_status = 0;
8738 /* Copy the packet into buffer BUF2, encapsulating it
8739 and giving it a checksum. */
8744 for (i = 0; i < cnt; i++)
8750 *p++ = tohex ((csum >> 4) & 0xf);
8751 *p++ = tohex (csum & 0xf);
8753 /* Send it over and over until we get a positive ack. */
8757 int started_error_output = 0;
8763 int len = (int) (p - buf2);
8766 = escape_buffer (buf2, std::min (len, REMOTE_DEBUG_MAX_CHAR));
8768 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s", str.c_str ());
8770 if (str.length () > REMOTE_DEBUG_MAX_CHAR)
8772 fprintf_unfiltered (gdb_stdlog, "[%zu bytes omitted]",
8773 str.length () - REMOTE_DEBUG_MAX_CHAR);
8776 fprintf_unfiltered (gdb_stdlog, "...");
8778 gdb_flush (gdb_stdlog);
8780 remote_serial_write (buf2, p - buf2);
8782 /* If this is a no acks version of the remote protocol, send the
8783 packet and move on. */
8787 /* Read until either a timeout occurs (-2) or '+' is read.
8788 Handle any notification that arrives in the mean time. */
8791 ch = readchar (remote_timeout);
8799 case SERIAL_TIMEOUT:
8802 if (started_error_output)
8804 putchar_unfiltered ('\n');
8805 started_error_output = 0;
8814 fprintf_unfiltered (gdb_stdlog, "Ack\n");
8815 do_cleanups (old_chain);
8819 fprintf_unfiltered (gdb_stdlog, "Nak\n");
8821 case SERIAL_TIMEOUT:
8825 do_cleanups (old_chain);
8828 break; /* Retransmit buffer. */
8832 fprintf_unfiltered (gdb_stdlog,
8833 "Packet instead of Ack, ignoring it\n");
8834 /* It's probably an old response sent because an ACK
8835 was lost. Gobble up the packet and ack it so it
8836 doesn't get retransmitted when we resend this
8839 remote_serial_write ("+", 1);
8840 continue; /* Now, go look for +. */
8847 /* If we got a notification, handle it, and go back to looking
8849 /* We've found the start of a notification. Now
8850 collect the data. */
8851 val = read_frame (&rs->buf, &rs->buf_size);
8856 std::string str = escape_buffer (rs->buf, val);
8858 fprintf_unfiltered (gdb_stdlog,
8859 " Notification received: %s\n",
8862 handle_notification (rs->notif_state, rs->buf);
8863 /* We're in sync now, rewait for the ack. */
8870 if (!started_error_output)
8872 started_error_output = 1;
8873 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
8875 fputc_unfiltered (ch & 0177, gdb_stdlog);
8876 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
8885 if (!started_error_output)
8887 started_error_output = 1;
8888 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
8890 fputc_unfiltered (ch & 0177, gdb_stdlog);
8894 break; /* Here to retransmit. */
8898 /* This is wrong. If doing a long backtrace, the user should be
8899 able to get out next time we call QUIT, without anything as
8900 violent as interrupt_query. If we want to provide a way out of
8901 here without getting to the next QUIT, it should be based on
8902 hitting ^C twice as in remote_wait. */
8911 do_cleanups (old_chain);
8915 /* Come here after finding the start of a frame when we expected an
8916 ack. Do our best to discard the rest of this packet. */
8925 c = readchar (remote_timeout);
8928 case SERIAL_TIMEOUT:
8929 /* Nothing we can do. */
8932 /* Discard the two bytes of checksum and stop. */
8933 c = readchar (remote_timeout);
8935 c = readchar (remote_timeout);
8938 case '*': /* Run length encoding. */
8939 /* Discard the repeat count. */
8940 c = readchar (remote_timeout);
8945 /* A regular character. */
8951 /* Come here after finding the start of the frame. Collect the rest
8952 into *BUF, verifying the checksum, length, and handling run-length
8953 compression. NUL terminate the buffer. If there is not enough room,
8954 expand *BUF using xrealloc.
8956 Returns -1 on error, number of characters in buffer (ignoring the
8957 trailing NULL) on success. (could be extended to return one of the
8958 SERIAL status indications). */
8961 read_frame (char **buf_p,
8968 struct remote_state *rs = get_remote_state ();
8975 c = readchar (remote_timeout);
8978 case SERIAL_TIMEOUT:
8980 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
8984 fputs_filtered ("Saw new packet start in middle of old one\n",
8986 return -1; /* Start a new packet, count retries. */
8989 unsigned char pktcsum;
8995 check_0 = readchar (remote_timeout);
8997 check_1 = readchar (remote_timeout);
8999 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
9002 fputs_filtered ("Timeout in checksum, retrying\n",
9006 else if (check_0 < 0 || check_1 < 0)
9009 fputs_filtered ("Communication error in checksum\n",
9014 /* Don't recompute the checksum; with no ack packets we
9015 don't have any way to indicate a packet retransmission
9020 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
9021 if (csum == pktcsum)
9026 std::string str = escape_buffer (buf, bc);
9028 fprintf_unfiltered (gdb_stdlog,
9029 "Bad checksum, sentsum=0x%x, "
9030 "csum=0x%x, buf=%s\n",
9031 pktcsum, csum, str.c_str ());
9033 /* Number of characters in buffer ignoring trailing
9037 case '*': /* Run length encoding. */
9042 c = readchar (remote_timeout);
9044 repeat = c - ' ' + 3; /* Compute repeat count. */
9046 /* The character before ``*'' is repeated. */
9048 if (repeat > 0 && repeat <= 255 && bc > 0)
9050 if (bc + repeat - 1 >= *sizeof_buf - 1)
9052 /* Make some more room in the buffer. */
9053 *sizeof_buf += repeat;
9054 *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf);
9058 memset (&buf[bc], buf[bc - 1], repeat);
9064 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
9068 if (bc >= *sizeof_buf - 1)
9070 /* Make some more room in the buffer. */
9072 *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf);
9083 /* Read a packet from the remote machine, with error checking, and
9084 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9085 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9086 rather than timing out; this is used (in synchronous mode) to wait
9087 for a target that is is executing user code to stop. */
9088 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9089 don't have to change all the calls to getpkt to deal with the
9090 return value, because at the moment I don't know what the right
9091 thing to do it for those. */
9097 getpkt_sane (buf, sizeof_buf, forever);
9101 /* Read a packet from the remote machine, with error checking, and
9102 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9103 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9104 rather than timing out; this is used (in synchronous mode) to wait
9105 for a target that is is executing user code to stop. If FOREVER ==
9106 0, this function is allowed to time out gracefully and return an
9107 indication of this to the caller. Otherwise return the number of
9108 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9109 enough reason to return to the caller. *IS_NOTIF is an output
9110 boolean that indicates whether *BUF holds a notification or not
9111 (a regular packet). */
9114 getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
9115 int expecting_notif, int *is_notif)
9117 struct remote_state *rs = get_remote_state ();
9123 /* We're reading a new response. Make sure we don't look at a
9124 previously cached response. */
9125 rs->cached_wait_status = 0;
9127 strcpy (*buf, "timeout");
9130 timeout = watchdog > 0 ? watchdog : -1;
9131 else if (expecting_notif)
9132 timeout = 0; /* There should already be a char in the buffer. If
9135 timeout = remote_timeout;
9139 /* Process any number of notifications, and then return when
9143 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9145 for (tries = 1; tries <= MAX_TRIES; tries++)
9147 /* This can loop forever if the remote side sends us
9148 characters continuously, but if it pauses, we'll get
9149 SERIAL_TIMEOUT from readchar because of timeout. Then
9150 we'll count that as a retry.
9152 Note that even when forever is set, we will only wait
9153 forever prior to the start of a packet. After that, we
9154 expect characters to arrive at a brisk pace. They should
9155 show up within remote_timeout intervals. */
9157 c = readchar (timeout);
9158 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
9160 if (c == SERIAL_TIMEOUT)
9162 if (expecting_notif)
9163 return -1; /* Don't complain, it's normal to not get
9164 anything in this case. */
9166 if (forever) /* Watchdog went off? Kill the target. */
9168 remote_unpush_target ();
9169 throw_error (TARGET_CLOSE_ERROR,
9170 _("Watchdog timeout has expired. "
9171 "Target detached."));
9174 fputs_filtered ("Timed out.\n", gdb_stdlog);
9178 /* We've found the start of a packet or notification.
9179 Now collect the data. */
9180 val = read_frame (buf, sizeof_buf);
9185 remote_serial_write ("-", 1);
9188 if (tries > MAX_TRIES)
9190 /* We have tried hard enough, and just can't receive the
9191 packet/notification. Give up. */
9192 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9194 /* Skip the ack char if we're in no-ack mode. */
9195 if (!rs->noack_mode)
9196 remote_serial_write ("+", 1);
9200 /* If we got an ordinary packet, return that to our caller. */
9206 = escape_buffer (*buf,
9207 std::min (val, REMOTE_DEBUG_MAX_CHAR));
9209 fprintf_unfiltered (gdb_stdlog, "Packet received: %s",
9212 if (str.length () > REMOTE_DEBUG_MAX_CHAR)
9214 fprintf_unfiltered (gdb_stdlog, "[%zu bytes omitted]",
9215 str.length () - REMOTE_DEBUG_MAX_CHAR);
9218 fprintf_unfiltered (gdb_stdlog, "\n");
9221 /* Skip the ack char if we're in no-ack mode. */
9222 if (!rs->noack_mode)
9223 remote_serial_write ("+", 1);
9224 if (is_notif != NULL)
9229 /* If we got a notification, handle it, and go back to looking
9233 gdb_assert (c == '%');
9237 std::string str = escape_buffer (*buf, val);
9239 fprintf_unfiltered (gdb_stdlog,
9240 " Notification received: %s\n",
9243 if (is_notif != NULL)
9246 handle_notification (rs->notif_state, *buf);
9248 /* Notifications require no acknowledgement. */
9250 if (expecting_notif)
9257 getpkt_sane (char **buf, long *sizeof_buf, int forever)
9259 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0, NULL);
9263 getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever,
9266 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1,
9270 /* Check whether EVENT is a fork event for the process specified
9271 by the pid passed in DATA, and if it is, kill the fork child. */
9274 kill_child_of_pending_fork (QUEUE (stop_reply_p) *q,
9275 QUEUE_ITER (stop_reply_p) *iter,
9279 struct queue_iter_param *param = (struct queue_iter_param *) data;
9280 int parent_pid = *(int *) param->input;
9282 if (is_pending_fork_parent (&event->ws, parent_pid, event->ptid))
9284 struct remote_state *rs = get_remote_state ();
9285 int child_pid = ptid_get_pid (event->ws.value.related_pid);
9288 res = remote_vkill (child_pid, rs);
9290 error (_("Can't kill fork child process %d"), child_pid);
9296 /* Kill any new fork children of process PID that haven't been
9297 processed by follow_fork. */
9300 kill_new_fork_children (int pid, struct remote_state *rs)
9302 struct thread_info *thread;
9303 struct notif_client *notif = ¬if_client_stop;
9304 struct queue_iter_param param;
9306 /* Kill the fork child threads of any threads in process PID
9307 that are stopped at a fork event. */
9308 ALL_NON_EXITED_THREADS (thread)
9310 struct target_waitstatus *ws = &thread->pending_follow;
9312 if (is_pending_fork_parent (ws, pid, thread->ptid))
9314 struct remote_state *rs = get_remote_state ();
9315 int child_pid = ptid_get_pid (ws->value.related_pid);
9318 res = remote_vkill (child_pid, rs);
9320 error (_("Can't kill fork child process %d"), child_pid);
9324 /* Check for any pending fork events (not reported or processed yet)
9325 in process PID and kill those fork child threads as well. */
9326 remote_notif_get_pending_events (notif);
9328 param.output = NULL;
9329 QUEUE_iterate (stop_reply_p, stop_reply_queue,
9330 kill_child_of_pending_fork, ¶m);
9334 /* Target hook to kill the current inferior. */
9337 remote_kill (struct target_ops *ops)
9340 int pid = ptid_get_pid (inferior_ptid);
9341 struct remote_state *rs = get_remote_state ();
9343 if (packet_support (PACKET_vKill) != PACKET_DISABLE)
9345 /* If we're stopped while forking and we haven't followed yet,
9346 kill the child task. We need to do this before killing the
9347 parent task because if this is a vfork then the parent will
9349 kill_new_fork_children (pid, rs);
9351 res = remote_vkill (pid, rs);
9354 target_mourn_inferior (inferior_ptid);
9359 /* If we are in 'target remote' mode and we are killing the only
9360 inferior, then we will tell gdbserver to exit and unpush the
9362 if (res == -1 && !remote_multi_process_p (rs)
9363 && number_of_live_inferiors () == 1)
9367 /* We've killed the remote end, we get to mourn it. If we are
9368 not in extended mode, mourning the inferior also unpushes
9369 remote_ops from the target stack, which closes the remote
9371 target_mourn_inferior (inferior_ptid);
9376 error (_("Can't kill process"));
9379 /* Send a kill request to the target using the 'vKill' packet. */
9382 remote_vkill (int pid, struct remote_state *rs)
9384 if (packet_support (PACKET_vKill) == PACKET_DISABLE)
9387 /* Tell the remote target to detach. */
9388 xsnprintf (rs->buf, get_remote_packet_size (), "vKill;%x", pid);
9390 getpkt (&rs->buf, &rs->buf_size, 0);
9392 switch (packet_ok (rs->buf,
9393 &remote_protocol_packets[PACKET_vKill]))
9399 case PACKET_UNKNOWN:
9402 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
9406 /* Send a kill request to the target using the 'k' packet. */
9409 remote_kill_k (void)
9411 /* Catch errors so the user can quit from gdb even when we
9412 aren't on speaking terms with the remote system. */
9417 CATCH (ex, RETURN_MASK_ERROR)
9419 if (ex.error == TARGET_CLOSE_ERROR)
9421 /* If we got an (EOF) error that caused the target
9422 to go away, then we're done, that's what we wanted.
9423 "k" is susceptible to cause a premature EOF, given
9424 that the remote server isn't actually required to
9425 reply to "k", and it can happen that it doesn't
9426 even get to reply ACK to the "k". */
9430 /* Otherwise, something went wrong. We didn't actually kill
9431 the target. Just propagate the exception, and let the
9432 user or higher layers decide what to do. */
9433 throw_exception (ex);
9439 remote_mourn (struct target_ops *target)
9441 struct remote_state *rs = get_remote_state ();
9443 /* In 'target remote' mode with one inferior, we close the connection. */
9444 if (!rs->extended && number_of_live_inferiors () <= 1)
9446 unpush_target (target);
9448 /* remote_close takes care of doing most of the clean up. */
9449 generic_mourn_inferior ();
9453 /* In case we got here due to an error, but we're going to stay
9455 rs->waiting_for_stop_reply = 0;
9457 /* If the current general thread belonged to the process we just
9458 detached from or has exited, the remote side current general
9459 thread becomes undefined. Considering a case like this:
9461 - We just got here due to a detach.
9462 - The process that we're detaching from happens to immediately
9463 report a global breakpoint being hit in non-stop mode, in the
9464 same thread we had selected before.
9465 - GDB attaches to this process again.
9466 - This event happens to be the next event we handle.
9468 GDB would consider that the current general thread didn't need to
9469 be set on the stub side (with Hg), since for all it knew,
9470 GENERAL_THREAD hadn't changed.
9472 Notice that although in all-stop mode, the remote server always
9473 sets the current thread to the thread reporting the stop event,
9474 that doesn't happen in non-stop mode; in non-stop, the stub *must
9475 not* change the current thread when reporting a breakpoint hit,
9476 due to the decoupling of event reporting and event handling.
9478 To keep things simple, we always invalidate our notion of the
9480 record_currthread (rs, minus_one_ptid);
9482 /* Call common code to mark the inferior as not running. */
9483 generic_mourn_inferior ();
9485 if (!have_inferiors ())
9487 if (!remote_multi_process_p (rs))
9489 /* Check whether the target is running now - some remote stubs
9490 automatically restart after kill. */
9492 getpkt (&rs->buf, &rs->buf_size, 0);
9494 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
9496 /* Assume that the target has been restarted. Set
9497 inferior_ptid so that bits of core GDB realizes
9498 there's something here, e.g., so that the user can
9499 say "kill" again. */
9500 inferior_ptid = magic_null_ptid;
9507 extended_remote_supports_disable_randomization (struct target_ops *self)
9509 return packet_support (PACKET_QDisableRandomization) == PACKET_ENABLE;
9513 extended_remote_disable_randomization (int val)
9515 struct remote_state *rs = get_remote_state ();
9518 xsnprintf (rs->buf, get_remote_packet_size (), "QDisableRandomization:%x",
9521 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
9523 error (_("Target does not support QDisableRandomization."));
9524 if (strcmp (reply, "OK") != 0)
9525 error (_("Bogus QDisableRandomization reply from target: %s"), reply);
9529 extended_remote_run (const std::string &args)
9531 struct remote_state *rs = get_remote_state ();
9533 const char *remote_exec_file = get_remote_exec_file ();
9535 /* If the user has disabled vRun support, or we have detected that
9536 support is not available, do not try it. */
9537 if (packet_support (PACKET_vRun) == PACKET_DISABLE)
9540 strcpy (rs->buf, "vRun;");
9541 len = strlen (rs->buf);
9543 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
9544 error (_("Remote file name too long for run packet"));
9545 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len,
9546 strlen (remote_exec_file));
9550 struct cleanup *back_to;
9554 argv = gdb_buildargv (args.c_str ());
9555 back_to = make_cleanup_freeargv (argv);
9556 for (i = 0; argv[i] != NULL; i++)
9558 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
9559 error (_("Argument list too long for run packet"));
9560 rs->buf[len++] = ';';
9561 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len,
9564 do_cleanups (back_to);
9567 rs->buf[len++] = '\0';
9570 getpkt (&rs->buf, &rs->buf_size, 0);
9572 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]))
9575 /* We have a wait response. All is well. */
9577 case PACKET_UNKNOWN:
9580 if (remote_exec_file[0] == '\0')
9581 error (_("Running the default executable on the remote target failed; "
9582 "try \"set remote exec-file\"?"));
9584 error (_("Running \"%s\" on the remote target failed"),
9587 gdb_assert_not_reached (_("bad switch"));
9591 /* In the extended protocol we want to be able to do things like
9592 "run" and have them basically work as expected. So we need
9593 a special create_inferior function. We support changing the
9594 executable file and the command line arguments, but not the
9598 extended_remote_create_inferior (struct target_ops *ops,
9599 const char *exec_file,
9600 const std::string &args,
9601 char **env, int from_tty)
9605 struct remote_state *rs = get_remote_state ();
9606 const char *remote_exec_file = get_remote_exec_file ();
9608 /* If running asynchronously, register the target file descriptor
9609 with the event loop. */
9610 if (target_can_async_p ())
9613 /* Disable address space randomization if requested (and supported). */
9614 if (extended_remote_supports_disable_randomization (ops))
9615 extended_remote_disable_randomization (disable_randomization);
9617 /* Now restart the remote server. */
9618 run_worked = extended_remote_run (args) != -1;
9621 /* vRun was not supported. Fail if we need it to do what the
9623 if (remote_exec_file[0])
9624 error (_("Remote target does not support \"set remote exec-file\""));
9626 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9628 /* Fall back to "R". */
9629 extended_remote_restart ();
9632 if (!have_inferiors ())
9634 /* Clean up from the last time we ran, before we mark the target
9635 running again. This will mark breakpoints uninserted, and
9636 get_offsets may insert breakpoints. */
9637 init_thread_list ();
9638 init_wait_for_inferior ();
9641 /* vRun's success return is a stop reply. */
9642 stop_reply = run_worked ? rs->buf : NULL;
9643 add_current_inferior_and_thread (stop_reply);
9645 /* Get updated offsets, if the stub uses qOffsets. */
9650 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9651 the list of conditions (in agent expression bytecode format), if any, the
9652 target needs to evaluate. The output is placed into the packet buffer
9653 started from BUF and ended at BUF_END. */
9656 remote_add_target_side_condition (struct gdbarch *gdbarch,
9657 struct bp_target_info *bp_tgt, char *buf,
9660 if (bp_tgt->conditions.empty ())
9663 buf += strlen (buf);
9664 xsnprintf (buf, buf_end - buf, "%s", ";");
9667 /* Send conditions to the target. */
9668 for (agent_expr *aexpr : bp_tgt->conditions)
9670 xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len);
9671 buf += strlen (buf);
9672 for (int i = 0; i < aexpr->len; ++i)
9673 buf = pack_hex_byte (buf, aexpr->buf[i]);
9680 remote_add_target_side_commands (struct gdbarch *gdbarch,
9681 struct bp_target_info *bp_tgt, char *buf)
9683 if (bp_tgt->tcommands.empty ())
9686 buf += strlen (buf);
9688 sprintf (buf, ";cmds:%x,", bp_tgt->persist);
9689 buf += strlen (buf);
9691 /* Concatenate all the agent expressions that are commands into the
9693 for (agent_expr *aexpr : bp_tgt->tcommands)
9695 sprintf (buf, "X%x,", aexpr->len);
9696 buf += strlen (buf);
9697 for (int i = 0; i < aexpr->len; ++i)
9698 buf = pack_hex_byte (buf, aexpr->buf[i]);
9703 /* Insert a breakpoint. On targets that have software breakpoint
9704 support, we ask the remote target to do the work; on targets
9705 which don't, we insert a traditional memory breakpoint. */
9708 remote_insert_breakpoint (struct target_ops *ops,
9709 struct gdbarch *gdbarch,
9710 struct bp_target_info *bp_tgt)
9712 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9713 If it succeeds, then set the support to PACKET_ENABLE. If it
9714 fails, and the user has explicitly requested the Z support then
9715 report an error, otherwise, mark it disabled and go on. */
9717 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
9719 CORE_ADDR addr = bp_tgt->reqstd_address;
9720 struct remote_state *rs;
9724 /* Make sure the remote is pointing at the right process, if
9726 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9727 set_general_process ();
9729 rs = get_remote_state ();
9731 endbuf = rs->buf + get_remote_packet_size ();
9736 addr = (ULONGEST) remote_address_masked (addr);
9737 p += hexnumstr (p, addr);
9738 xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind);
9740 if (remote_supports_cond_breakpoints (ops))
9741 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
9743 if (remote_can_run_breakpoint_commands (ops))
9744 remote_add_target_side_commands (gdbarch, bp_tgt, p);
9747 getpkt (&rs->buf, &rs->buf_size, 0);
9749 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
9755 case PACKET_UNKNOWN:
9760 /* If this breakpoint has target-side commands but this stub doesn't
9761 support Z0 packets, throw error. */
9762 if (!bp_tgt->tcommands.empty ())
9763 throw_error (NOT_SUPPORTED_ERROR, _("\
9764 Target doesn't support breakpoints that have target side commands."));
9766 return memory_insert_breakpoint (ops, gdbarch, bp_tgt);
9770 remote_remove_breakpoint (struct target_ops *ops,
9771 struct gdbarch *gdbarch,
9772 struct bp_target_info *bp_tgt,
9773 enum remove_bp_reason reason)
9775 CORE_ADDR addr = bp_tgt->placed_address;
9776 struct remote_state *rs = get_remote_state ();
9778 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
9781 char *endbuf = rs->buf + get_remote_packet_size ();
9783 /* Make sure the remote is pointing at the right process, if
9785 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9786 set_general_process ();
9792 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
9793 p += hexnumstr (p, addr);
9794 xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind);
9797 getpkt (&rs->buf, &rs->buf_size, 0);
9799 return (rs->buf[0] == 'E');
9802 return memory_remove_breakpoint (ops, gdbarch, bp_tgt, reason);
9805 static enum Z_packet_type
9806 watchpoint_to_Z_packet (int type)
9811 return Z_PACKET_WRITE_WP;
9814 return Z_PACKET_READ_WP;
9817 return Z_PACKET_ACCESS_WP;
9820 internal_error (__FILE__, __LINE__,
9821 _("hw_bp_to_z: bad watchpoint type %d"), type);
9826 remote_insert_watchpoint (struct target_ops *self, CORE_ADDR addr, int len,
9827 enum target_hw_bp_type type, struct expression *cond)
9829 struct remote_state *rs = get_remote_state ();
9830 char *endbuf = rs->buf + get_remote_packet_size ();
9832 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
9834 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
9837 /* Make sure the remote is pointing at the right process, if
9839 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9840 set_general_process ();
9842 xsnprintf (rs->buf, endbuf - rs->buf, "Z%x,", packet);
9843 p = strchr (rs->buf, '\0');
9844 addr = remote_address_masked (addr);
9845 p += hexnumstr (p, (ULONGEST) addr);
9846 xsnprintf (p, endbuf - p, ",%x", len);
9849 getpkt (&rs->buf, &rs->buf_size, 0);
9851 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
9855 case PACKET_UNKNOWN:
9860 internal_error (__FILE__, __LINE__,
9861 _("remote_insert_watchpoint: reached end of function"));
9865 remote_watchpoint_addr_within_range (struct target_ops *target, CORE_ADDR addr,
9866 CORE_ADDR start, int length)
9868 CORE_ADDR diff = remote_address_masked (addr - start);
9870 return diff < length;
9875 remote_remove_watchpoint (struct target_ops *self, CORE_ADDR addr, int len,
9876 enum target_hw_bp_type type, struct expression *cond)
9878 struct remote_state *rs = get_remote_state ();
9879 char *endbuf = rs->buf + get_remote_packet_size ();
9881 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
9883 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
9886 /* Make sure the remote is pointing at the right process, if
9888 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9889 set_general_process ();
9891 xsnprintf (rs->buf, endbuf - rs->buf, "z%x,", packet);
9892 p = strchr (rs->buf, '\0');
9893 addr = remote_address_masked (addr);
9894 p += hexnumstr (p, (ULONGEST) addr);
9895 xsnprintf (p, endbuf - p, ",%x", len);
9897 getpkt (&rs->buf, &rs->buf_size, 0);
9899 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
9902 case PACKET_UNKNOWN:
9907 internal_error (__FILE__, __LINE__,
9908 _("remote_remove_watchpoint: reached end of function"));
9912 int remote_hw_watchpoint_limit = -1;
9913 int remote_hw_watchpoint_length_limit = -1;
9914 int remote_hw_breakpoint_limit = -1;
9917 remote_region_ok_for_hw_watchpoint (struct target_ops *self,
9918 CORE_ADDR addr, int len)
9920 if (remote_hw_watchpoint_length_limit == 0)
9922 else if (remote_hw_watchpoint_length_limit < 0)
9924 else if (len <= remote_hw_watchpoint_length_limit)
9931 remote_check_watch_resources (struct target_ops *self,
9932 enum bptype type, int cnt, int ot)
9934 if (type == bp_hardware_breakpoint)
9936 if (remote_hw_breakpoint_limit == 0)
9938 else if (remote_hw_breakpoint_limit < 0)
9940 else if (cnt <= remote_hw_breakpoint_limit)
9945 if (remote_hw_watchpoint_limit == 0)
9947 else if (remote_hw_watchpoint_limit < 0)
9951 else if (cnt <= remote_hw_watchpoint_limit)
9957 /* The to_stopped_by_sw_breakpoint method of target remote. */
9960 remote_stopped_by_sw_breakpoint (struct target_ops *ops)
9962 struct thread_info *thread = inferior_thread ();
9964 return (thread->priv != NULL
9965 && thread->priv->stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT);
9968 /* The to_supports_stopped_by_sw_breakpoint method of target
9972 remote_supports_stopped_by_sw_breakpoint (struct target_ops *ops)
9974 return (packet_support (PACKET_swbreak_feature) == PACKET_ENABLE);
9977 /* The to_stopped_by_hw_breakpoint method of target remote. */
9980 remote_stopped_by_hw_breakpoint (struct target_ops *ops)
9982 struct thread_info *thread = inferior_thread ();
9984 return (thread->priv != NULL
9985 && thread->priv->stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT);
9988 /* The to_supports_stopped_by_hw_breakpoint method of target
9992 remote_supports_stopped_by_hw_breakpoint (struct target_ops *ops)
9994 return (packet_support (PACKET_hwbreak_feature) == PACKET_ENABLE);
9998 remote_stopped_by_watchpoint (struct target_ops *ops)
10000 struct thread_info *thread = inferior_thread ();
10002 return (thread->priv != NULL
10003 && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT);
10007 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
10009 struct thread_info *thread = inferior_thread ();
10011 if (thread->priv != NULL
10012 && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT)
10014 *addr_p = thread->priv->watch_data_address;
10023 remote_insert_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
10024 struct bp_target_info *bp_tgt)
10026 CORE_ADDR addr = bp_tgt->reqstd_address;
10027 struct remote_state *rs;
10031 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
10034 /* Make sure the remote is pointing at the right process, if
10036 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10037 set_general_process ();
10039 rs = get_remote_state ();
10041 endbuf = rs->buf + get_remote_packet_size ();
10047 addr = remote_address_masked (addr);
10048 p += hexnumstr (p, (ULONGEST) addr);
10049 xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind);
10051 if (remote_supports_cond_breakpoints (self))
10052 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
10054 if (remote_can_run_breakpoint_commands (self))
10055 remote_add_target_side_commands (gdbarch, bp_tgt, p);
10058 getpkt (&rs->buf, &rs->buf_size, 0);
10060 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
10063 if (rs->buf[1] == '.')
10065 message = strchr (rs->buf + 2, '.');
10067 error (_("Remote failure reply: %s"), message + 1);
10070 case PACKET_UNKNOWN:
10075 internal_error (__FILE__, __LINE__,
10076 _("remote_insert_hw_breakpoint: reached end of function"));
10081 remote_remove_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
10082 struct bp_target_info *bp_tgt)
10085 struct remote_state *rs = get_remote_state ();
10087 char *endbuf = rs->buf + get_remote_packet_size ();
10089 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
10092 /* Make sure the remote is pointing at the right process, if
10094 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10095 set_general_process ();
10101 addr = remote_address_masked (bp_tgt->placed_address);
10102 p += hexnumstr (p, (ULONGEST) addr);
10103 xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind);
10106 getpkt (&rs->buf, &rs->buf_size, 0);
10108 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
10111 case PACKET_UNKNOWN:
10116 internal_error (__FILE__, __LINE__,
10117 _("remote_remove_hw_breakpoint: reached end of function"));
10120 /* Verify memory using the "qCRC:" request. */
10123 remote_verify_memory (struct target_ops *ops,
10124 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
10126 struct remote_state *rs = get_remote_state ();
10127 unsigned long host_crc, target_crc;
10130 /* It doesn't make sense to use qCRC if the remote target is
10131 connected but not running. */
10132 if (target_has_execution && packet_support (PACKET_qCRC) != PACKET_DISABLE)
10134 enum packet_result result;
10136 /* Make sure the remote is pointing at the right process. */
10137 set_general_process ();
10139 /* FIXME: assumes lma can fit into long. */
10140 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
10141 (long) lma, (long) size);
10144 /* Be clever; compute the host_crc before waiting for target
10146 host_crc = xcrc32 (data, size, 0xffffffff);
10148 getpkt (&rs->buf, &rs->buf_size, 0);
10150 result = packet_ok (rs->buf,
10151 &remote_protocol_packets[PACKET_qCRC]);
10152 if (result == PACKET_ERROR)
10154 else if (result == PACKET_OK)
10156 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
10157 target_crc = target_crc * 16 + fromhex (*tmp);
10159 return (host_crc == target_crc);
10163 return simple_verify_memory (ops, data, lma, size);
10166 /* compare-sections command
10168 With no arguments, compares each loadable section in the exec bfd
10169 with the same memory range on the target, and reports mismatches.
10170 Useful for verifying the image on the target against the exec file. */
10173 compare_sections_command (char *args, int from_tty)
10176 struct cleanup *old_chain;
10177 gdb_byte *sectdata;
10178 const char *sectname;
10179 bfd_size_type size;
10182 int mismatched = 0;
10187 error (_("command cannot be used without an exec file"));
10189 /* Make sure the remote is pointing at the right process. */
10190 set_general_process ();
10192 if (args != NULL && strcmp (args, "-r") == 0)
10198 for (s = exec_bfd->sections; s; s = s->next)
10200 if (!(s->flags & SEC_LOAD))
10201 continue; /* Skip non-loadable section. */
10203 if (read_only && (s->flags & SEC_READONLY) == 0)
10204 continue; /* Skip writeable sections */
10206 size = bfd_get_section_size (s);
10208 continue; /* Skip zero-length section. */
10210 sectname = bfd_get_section_name (exec_bfd, s);
10211 if (args && strcmp (args, sectname) != 0)
10212 continue; /* Not the section selected by user. */
10214 matched = 1; /* Do this section. */
10217 sectdata = (gdb_byte *) xmalloc (size);
10218 old_chain = make_cleanup (xfree, sectdata);
10219 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
10221 res = target_verify_memory (sectdata, lma, size);
10224 error (_("target memory fault, section %s, range %s -- %s"), sectname,
10225 paddress (target_gdbarch (), lma),
10226 paddress (target_gdbarch (), lma + size));
10228 printf_filtered ("Section %s, range %s -- %s: ", sectname,
10229 paddress (target_gdbarch (), lma),
10230 paddress (target_gdbarch (), lma + size));
10232 printf_filtered ("matched.\n");
10235 printf_filtered ("MIS-MATCHED!\n");
10239 do_cleanups (old_chain);
10241 if (mismatched > 0)
10242 warning (_("One or more sections of the target image does not match\n\
10243 the loaded file\n"));
10244 if (args && !matched)
10245 printf_filtered (_("No loaded section named '%s'.\n"), args);
10248 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10249 into remote target. The number of bytes written to the remote
10250 target is returned, or -1 for error. */
10252 static enum target_xfer_status
10253 remote_write_qxfer (struct target_ops *ops, const char *object_name,
10254 const char *annex, const gdb_byte *writebuf,
10255 ULONGEST offset, LONGEST len, ULONGEST *xfered_len,
10256 struct packet_config *packet)
10260 struct remote_state *rs = get_remote_state ();
10261 int max_size = get_memory_write_packet_size ();
10263 if (packet->support == PACKET_DISABLE)
10264 return TARGET_XFER_E_IO;
10266 /* Insert header. */
10267 i = snprintf (rs->buf, max_size,
10268 "qXfer:%s:write:%s:%s:",
10269 object_name, annex ? annex : "",
10270 phex_nz (offset, sizeof offset));
10271 max_size -= (i + 1);
10273 /* Escape as much data as fits into rs->buf. */
10274 buf_len = remote_escape_output
10275 (writebuf, len, 1, (gdb_byte *) rs->buf + i, &max_size, max_size);
10277 if (putpkt_binary (rs->buf, i + buf_len) < 0
10278 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
10279 || packet_ok (rs->buf, packet) != PACKET_OK)
10280 return TARGET_XFER_E_IO;
10282 unpack_varlen_hex (rs->buf, &n);
10285 return TARGET_XFER_OK;
10288 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10289 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10290 number of bytes read is returned, or 0 for EOF, or -1 for error.
10291 The number of bytes read may be less than LEN without indicating an
10292 EOF. PACKET is checked and updated to indicate whether the remote
10293 target supports this object. */
10295 static enum target_xfer_status
10296 remote_read_qxfer (struct target_ops *ops, const char *object_name,
10298 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
10299 ULONGEST *xfered_len,
10300 struct packet_config *packet)
10302 struct remote_state *rs = get_remote_state ();
10303 LONGEST i, n, packet_len;
10305 if (packet->support == PACKET_DISABLE)
10306 return TARGET_XFER_E_IO;
10308 /* Check whether we've cached an end-of-object packet that matches
10310 if (rs->finished_object)
10312 if (strcmp (object_name, rs->finished_object) == 0
10313 && strcmp (annex ? annex : "", rs->finished_annex) == 0
10314 && offset == rs->finished_offset)
10315 return TARGET_XFER_EOF;
10318 /* Otherwise, we're now reading something different. Discard
10320 xfree (rs->finished_object);
10321 xfree (rs->finished_annex);
10322 rs->finished_object = NULL;
10323 rs->finished_annex = NULL;
10326 /* Request only enough to fit in a single packet. The actual data
10327 may not, since we don't know how much of it will need to be escaped;
10328 the target is free to respond with slightly less data. We subtract
10329 five to account for the response type and the protocol frame. */
10330 n = std::min<LONGEST> (get_remote_packet_size () - 5, len);
10331 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10332 object_name, annex ? annex : "",
10333 phex_nz (offset, sizeof offset),
10334 phex_nz (n, sizeof n));
10335 i = putpkt (rs->buf);
10337 return TARGET_XFER_E_IO;
10340 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
10341 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
10342 return TARGET_XFER_E_IO;
10344 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
10345 error (_("Unknown remote qXfer reply: %s"), rs->buf);
10347 /* 'm' means there is (or at least might be) more data after this
10348 batch. That does not make sense unless there's at least one byte
10349 of data in this reply. */
10350 if (rs->buf[0] == 'm' && packet_len == 1)
10351 error (_("Remote qXfer reply contained no data."));
10353 /* Got some data. */
10354 i = remote_unescape_input ((gdb_byte *) rs->buf + 1,
10355 packet_len - 1, readbuf, n);
10357 /* 'l' is an EOF marker, possibly including a final block of data,
10358 or possibly empty. If we have the final block of a non-empty
10359 object, record this fact to bypass a subsequent partial read. */
10360 if (rs->buf[0] == 'l' && offset + i > 0)
10362 rs->finished_object = xstrdup (object_name);
10363 rs->finished_annex = xstrdup (annex ? annex : "");
10364 rs->finished_offset = offset + i;
10368 return TARGET_XFER_EOF;
10372 return TARGET_XFER_OK;
10376 static enum target_xfer_status
10377 remote_xfer_partial (struct target_ops *ops, enum target_object object,
10378 const char *annex, gdb_byte *readbuf,
10379 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
10380 ULONGEST *xfered_len)
10382 struct remote_state *rs;
10386 int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
10388 set_remote_traceframe ();
10389 set_general_thread (inferior_ptid);
10391 rs = get_remote_state ();
10393 /* Handle memory using the standard memory routines. */
10394 if (object == TARGET_OBJECT_MEMORY)
10396 /* If the remote target is connected but not running, we should
10397 pass this request down to a lower stratum (e.g. the executable
10399 if (!target_has_execution)
10400 return TARGET_XFER_EOF;
10402 if (writebuf != NULL)
10403 return remote_write_bytes (offset, writebuf, len, unit_size,
10406 return remote_read_bytes (ops, offset, readbuf, len, unit_size,
10410 /* Handle SPU memory using qxfer packets. */
10411 if (object == TARGET_OBJECT_SPU)
10414 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
10415 xfered_len, &remote_protocol_packets
10416 [PACKET_qXfer_spu_read]);
10418 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
10419 xfered_len, &remote_protocol_packets
10420 [PACKET_qXfer_spu_write]);
10423 /* Handle extra signal info using qxfer packets. */
10424 if (object == TARGET_OBJECT_SIGNAL_INFO)
10427 return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len,
10428 xfered_len, &remote_protocol_packets
10429 [PACKET_qXfer_siginfo_read]);
10431 return remote_write_qxfer (ops, "siginfo", annex,
10432 writebuf, offset, len, xfered_len,
10433 &remote_protocol_packets
10434 [PACKET_qXfer_siginfo_write]);
10437 if (object == TARGET_OBJECT_STATIC_TRACE_DATA)
10440 return remote_read_qxfer (ops, "statictrace", annex,
10441 readbuf, offset, len, xfered_len,
10442 &remote_protocol_packets
10443 [PACKET_qXfer_statictrace_read]);
10445 return TARGET_XFER_E_IO;
10448 /* Only handle flash writes. */
10449 if (writebuf != NULL)
10453 case TARGET_OBJECT_FLASH:
10454 return remote_flash_write (ops, offset, len, xfered_len,
10458 return TARGET_XFER_E_IO;
10462 /* Map pre-existing objects onto letters. DO NOT do this for new
10463 objects!!! Instead specify new query packets. */
10466 case TARGET_OBJECT_AVR:
10470 case TARGET_OBJECT_AUXV:
10471 gdb_assert (annex == NULL);
10472 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
10474 &remote_protocol_packets[PACKET_qXfer_auxv]);
10476 case TARGET_OBJECT_AVAILABLE_FEATURES:
10477 return remote_read_qxfer
10478 (ops, "features", annex, readbuf, offset, len, xfered_len,
10479 &remote_protocol_packets[PACKET_qXfer_features]);
10481 case TARGET_OBJECT_LIBRARIES:
10482 return remote_read_qxfer
10483 (ops, "libraries", annex, readbuf, offset, len, xfered_len,
10484 &remote_protocol_packets[PACKET_qXfer_libraries]);
10486 case TARGET_OBJECT_LIBRARIES_SVR4:
10487 return remote_read_qxfer
10488 (ops, "libraries-svr4", annex, readbuf, offset, len, xfered_len,
10489 &remote_protocol_packets[PACKET_qXfer_libraries_svr4]);
10491 case TARGET_OBJECT_MEMORY_MAP:
10492 gdb_assert (annex == NULL);
10493 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
10495 &remote_protocol_packets[PACKET_qXfer_memory_map]);
10497 case TARGET_OBJECT_OSDATA:
10498 /* Should only get here if we're connected. */
10499 gdb_assert (rs->remote_desc);
10500 return remote_read_qxfer
10501 (ops, "osdata", annex, readbuf, offset, len, xfered_len,
10502 &remote_protocol_packets[PACKET_qXfer_osdata]);
10504 case TARGET_OBJECT_THREADS:
10505 gdb_assert (annex == NULL);
10506 return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len,
10508 &remote_protocol_packets[PACKET_qXfer_threads]);
10510 case TARGET_OBJECT_TRACEFRAME_INFO:
10511 gdb_assert (annex == NULL);
10512 return remote_read_qxfer
10513 (ops, "traceframe-info", annex, readbuf, offset, len, xfered_len,
10514 &remote_protocol_packets[PACKET_qXfer_traceframe_info]);
10516 case TARGET_OBJECT_FDPIC:
10517 return remote_read_qxfer (ops, "fdpic", annex, readbuf, offset, len,
10519 &remote_protocol_packets[PACKET_qXfer_fdpic]);
10521 case TARGET_OBJECT_OPENVMS_UIB:
10522 return remote_read_qxfer (ops, "uib", annex, readbuf, offset, len,
10524 &remote_protocol_packets[PACKET_qXfer_uib]);
10526 case TARGET_OBJECT_BTRACE:
10527 return remote_read_qxfer (ops, "btrace", annex, readbuf, offset, len,
10529 &remote_protocol_packets[PACKET_qXfer_btrace]);
10531 case TARGET_OBJECT_BTRACE_CONF:
10532 return remote_read_qxfer (ops, "btrace-conf", annex, readbuf, offset,
10534 &remote_protocol_packets[PACKET_qXfer_btrace_conf]);
10536 case TARGET_OBJECT_EXEC_FILE:
10537 return remote_read_qxfer (ops, "exec-file", annex, readbuf, offset,
10539 &remote_protocol_packets[PACKET_qXfer_exec_file]);
10542 return TARGET_XFER_E_IO;
10545 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10546 large enough let the caller deal with it. */
10547 if (len < get_remote_packet_size ())
10548 return TARGET_XFER_E_IO;
10549 len = get_remote_packet_size ();
10551 /* Except for querying the minimum buffer size, target must be open. */
10552 if (!rs->remote_desc)
10553 error (_("remote query is only available after target open"));
10555 gdb_assert (annex != NULL);
10556 gdb_assert (readbuf != NULL);
10560 *p2++ = query_type;
10562 /* We used one buffer char for the remote protocol q command and
10563 another for the query type. As the remote protocol encapsulation
10564 uses 4 chars plus one extra in case we are debugging
10565 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10568 while (annex[i] && (i < (get_remote_packet_size () - 8)))
10570 /* Bad caller may have sent forbidden characters. */
10571 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
10576 gdb_assert (annex[i] == '\0');
10578 i = putpkt (rs->buf);
10580 return TARGET_XFER_E_IO;
10582 getpkt (&rs->buf, &rs->buf_size, 0);
10583 strcpy ((char *) readbuf, rs->buf);
10585 *xfered_len = strlen ((char *) readbuf);
10586 return TARGET_XFER_OK;
10589 /* Implementation of to_get_memory_xfer_limit. */
10592 remote_get_memory_xfer_limit (struct target_ops *ops)
10594 return get_memory_write_packet_size ();
10598 remote_search_memory (struct target_ops* ops,
10599 CORE_ADDR start_addr, ULONGEST search_space_len,
10600 const gdb_byte *pattern, ULONGEST pattern_len,
10601 CORE_ADDR *found_addrp)
10603 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
10604 struct remote_state *rs = get_remote_state ();
10605 int max_size = get_memory_write_packet_size ();
10606 struct packet_config *packet =
10607 &remote_protocol_packets[PACKET_qSearch_memory];
10608 /* Number of packet bytes used to encode the pattern;
10609 this could be more than PATTERN_LEN due to escape characters. */
10610 int escaped_pattern_len;
10611 /* Amount of pattern that was encodable in the packet. */
10612 int used_pattern_len;
10615 ULONGEST found_addr;
10617 /* Don't go to the target if we don't have to.
10618 This is done before checking packet->support to avoid the possibility that
10619 a success for this edge case means the facility works in general. */
10620 if (pattern_len > search_space_len)
10622 if (pattern_len == 0)
10624 *found_addrp = start_addr;
10628 /* If we already know the packet isn't supported, fall back to the simple
10629 way of searching memory. */
10631 if (packet_config_support (packet) == PACKET_DISABLE)
10633 /* Target doesn't provided special support, fall back and use the
10634 standard support (copy memory and do the search here). */
10635 return simple_search_memory (ops, start_addr, search_space_len,
10636 pattern, pattern_len, found_addrp);
10639 /* Make sure the remote is pointing at the right process. */
10640 set_general_process ();
10642 /* Insert header. */
10643 i = snprintf (rs->buf, max_size,
10644 "qSearch:memory:%s;%s;",
10645 phex_nz (start_addr, addr_size),
10646 phex_nz (search_space_len, sizeof (search_space_len)));
10647 max_size -= (i + 1);
10649 /* Escape as much data as fits into rs->buf. */
10650 escaped_pattern_len =
10651 remote_escape_output (pattern, pattern_len, 1, (gdb_byte *) rs->buf + i,
10652 &used_pattern_len, max_size);
10654 /* Bail if the pattern is too large. */
10655 if (used_pattern_len != pattern_len)
10656 error (_("Pattern is too large to transmit to remote target."));
10658 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
10659 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
10660 || packet_ok (rs->buf, packet) != PACKET_OK)
10662 /* The request may not have worked because the command is not
10663 supported. If so, fall back to the simple way. */
10664 if (packet->support == PACKET_DISABLE)
10666 return simple_search_memory (ops, start_addr, search_space_len,
10667 pattern, pattern_len, found_addrp);
10672 if (rs->buf[0] == '0')
10674 else if (rs->buf[0] == '1')
10677 if (rs->buf[1] != ',')
10678 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
10679 unpack_varlen_hex (rs->buf + 2, &found_addr);
10680 *found_addrp = found_addr;
10683 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
10689 remote_rcmd (struct target_ops *self, const char *command,
10690 struct ui_file *outbuf)
10692 struct remote_state *rs = get_remote_state ();
10695 if (!rs->remote_desc)
10696 error (_("remote rcmd is only available after target open"));
10698 /* Send a NULL command across as an empty command. */
10699 if (command == NULL)
10702 /* The query prefix. */
10703 strcpy (rs->buf, "qRcmd,");
10704 p = strchr (rs->buf, '\0');
10706 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/)
10707 > get_remote_packet_size ())
10708 error (_("\"monitor\" command ``%s'' is too long."), command);
10710 /* Encode the actual command. */
10711 bin2hex ((const gdb_byte *) command, p, strlen (command));
10713 if (putpkt (rs->buf) < 0)
10714 error (_("Communication problem with target."));
10716 /* get/display the response */
10721 /* XXX - see also remote_get_noisy_reply(). */
10722 QUIT; /* Allow user to bail out with ^C. */
10724 if (getpkt_sane (&rs->buf, &rs->buf_size, 0) == -1)
10726 /* Timeout. Continue to (try to) read responses.
10727 This is better than stopping with an error, assuming the stub
10728 is still executing the (long) monitor command.
10729 If needed, the user can interrupt gdb using C-c, obtaining
10730 an effect similar to stop on timeout. */
10734 if (buf[0] == '\0')
10735 error (_("Target does not support this command."));
10736 if (buf[0] == 'O' && buf[1] != 'K')
10738 remote_console_output (buf + 1); /* 'O' message from stub. */
10741 if (strcmp (buf, "OK") == 0)
10743 if (strlen (buf) == 3 && buf[0] == 'E'
10744 && isdigit (buf[1]) && isdigit (buf[2]))
10746 error (_("Protocol error with Rcmd"));
10748 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
10750 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
10752 fputc_unfiltered (c, outbuf);
10758 static VEC(mem_region_s) *
10759 remote_memory_map (struct target_ops *ops)
10761 VEC(mem_region_s) *result = NULL;
10762 char *text = target_read_stralloc (¤t_target,
10763 TARGET_OBJECT_MEMORY_MAP, NULL);
10767 struct cleanup *back_to = make_cleanup (xfree, text);
10769 result = parse_memory_map (text);
10770 do_cleanups (back_to);
10777 packet_command (char *args, int from_tty)
10779 struct remote_state *rs = get_remote_state ();
10781 if (!rs->remote_desc)
10782 error (_("command can only be used with remote target"));
10785 error (_("remote-packet command requires packet text as argument"));
10787 puts_filtered ("sending: ");
10788 print_packet (args);
10789 puts_filtered ("\n");
10792 getpkt (&rs->buf, &rs->buf_size, 0);
10793 puts_filtered ("received: ");
10794 print_packet (rs->buf);
10795 puts_filtered ("\n");
10799 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10801 static void display_thread_info (struct gdb_ext_thread_info *info);
10803 static void threadset_test_cmd (char *cmd, int tty);
10805 static void threadalive_test (char *cmd, int tty);
10807 static void threadlist_test_cmd (char *cmd, int tty);
10809 int get_and_display_threadinfo (threadref *ref);
10811 static void threadinfo_test_cmd (char *cmd, int tty);
10813 static int thread_display_step (threadref *ref, void *context);
10815 static void threadlist_update_test_cmd (char *cmd, int tty);
10817 static void init_remote_threadtests (void);
10819 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10822 threadset_test_cmd (char *cmd, int tty)
10824 int sample_thread = SAMPLE_THREAD;
10826 printf_filtered (_("Remote threadset test\n"));
10827 set_general_thread (sample_thread);
10832 threadalive_test (char *cmd, int tty)
10834 int sample_thread = SAMPLE_THREAD;
10835 int pid = ptid_get_pid (inferior_ptid);
10836 ptid_t ptid = ptid_build (pid, sample_thread, 0);
10838 if (remote_thread_alive (ptid))
10839 printf_filtered ("PASS: Thread alive test\n");
10841 printf_filtered ("FAIL: Thread alive test\n");
10844 void output_threadid (char *title, threadref *ref);
10847 output_threadid (char *title, threadref *ref)
10851 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
10853 printf_filtered ("%s %s\n", title, (&hexid[0]));
10857 threadlist_test_cmd (char *cmd, int tty)
10860 threadref nextthread;
10861 int done, result_count;
10862 threadref threadlist[3];
10864 printf_filtered ("Remote Threadlist test\n");
10865 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
10866 &result_count, &threadlist[0]))
10867 printf_filtered ("FAIL: threadlist test\n");
10870 threadref *scan = threadlist;
10871 threadref *limit = scan + result_count;
10873 while (scan < limit)
10874 output_threadid (" thread ", scan++);
10879 display_thread_info (struct gdb_ext_thread_info *info)
10881 output_threadid ("Threadid: ", &info->threadid);
10882 printf_filtered ("Name: %s\n ", info->shortname);
10883 printf_filtered ("State: %s\n", info->display);
10884 printf_filtered ("other: %s\n\n", info->more_display);
10888 get_and_display_threadinfo (threadref *ref)
10892 struct gdb_ext_thread_info threadinfo;
10894 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
10895 | TAG_MOREDISPLAY | TAG_DISPLAY;
10896 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
10897 display_thread_info (&threadinfo);
10902 threadinfo_test_cmd (char *cmd, int tty)
10904 int athread = SAMPLE_THREAD;
10908 int_to_threadref (&thread, athread);
10909 printf_filtered ("Remote Threadinfo test\n");
10910 if (!get_and_display_threadinfo (&thread))
10911 printf_filtered ("FAIL cannot get thread info\n");
10915 thread_display_step (threadref *ref, void *context)
10917 /* output_threadid(" threadstep ",ref); *//* simple test */
10918 return get_and_display_threadinfo (ref);
10922 threadlist_update_test_cmd (char *cmd, int tty)
10924 printf_filtered ("Remote Threadlist update test\n");
10925 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
10929 init_remote_threadtests (void)
10931 add_com ("tlist", class_obscure, threadlist_test_cmd,
10932 _("Fetch and print the remote list of "
10933 "thread identifiers, one pkt only"));
10934 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
10935 _("Fetch and display info about one thread"));
10936 add_com ("tset", class_obscure, threadset_test_cmd,
10937 _("Test setting to a different thread"));
10938 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
10939 _("Iterate through updating all remote thread info"));
10940 add_com ("talive", class_obscure, threadalive_test,
10941 _(" Remote thread alive test "));
10946 /* Convert a thread ID to a string. Returns the string in a static
10949 static const char *
10950 remote_pid_to_str (struct target_ops *ops, ptid_t ptid)
10952 static char buf[64];
10953 struct remote_state *rs = get_remote_state ();
10955 if (ptid_equal (ptid, null_ptid))
10956 return normal_pid_to_str (ptid);
10957 else if (ptid_is_pid (ptid))
10959 /* Printing an inferior target id. */
10961 /* When multi-process extensions are off, there's no way in the
10962 remote protocol to know the remote process id, if there's any
10963 at all. There's one exception --- when we're connected with
10964 target extended-remote, and we manually attached to a process
10965 with "attach PID". We don't record anywhere a flag that
10966 allows us to distinguish that case from the case of
10967 connecting with extended-remote and the stub already being
10968 attached to a process, and reporting yes to qAttached, hence
10969 no smart special casing here. */
10970 if (!remote_multi_process_p (rs))
10972 xsnprintf (buf, sizeof buf, "Remote target");
10976 return normal_pid_to_str (ptid);
10980 if (ptid_equal (magic_null_ptid, ptid))
10981 xsnprintf (buf, sizeof buf, "Thread <main>");
10982 else if (remote_multi_process_p (rs))
10983 if (ptid_get_lwp (ptid) == 0)
10984 return normal_pid_to_str (ptid);
10986 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
10987 ptid_get_pid (ptid), ptid_get_lwp (ptid));
10989 xsnprintf (buf, sizeof buf, "Thread %ld",
10990 ptid_get_lwp (ptid));
10995 /* Get the address of the thread local variable in OBJFILE which is
10996 stored at OFFSET within the thread local storage for thread PTID. */
10999 remote_get_thread_local_address (struct target_ops *ops,
11000 ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
11002 if (packet_support (PACKET_qGetTLSAddr) != PACKET_DISABLE)
11004 struct remote_state *rs = get_remote_state ();
11006 char *endp = rs->buf + get_remote_packet_size ();
11007 enum packet_result result;
11009 strcpy (p, "qGetTLSAddr:");
11011 p = write_ptid (p, endp, ptid);
11013 p += hexnumstr (p, offset);
11015 p += hexnumstr (p, lm);
11019 getpkt (&rs->buf, &rs->buf_size, 0);
11020 result = packet_ok (rs->buf,
11021 &remote_protocol_packets[PACKET_qGetTLSAddr]);
11022 if (result == PACKET_OK)
11026 unpack_varlen_hex (rs->buf, &result);
11029 else if (result == PACKET_UNKNOWN)
11030 throw_error (TLS_GENERIC_ERROR,
11031 _("Remote target doesn't support qGetTLSAddr packet"));
11033 throw_error (TLS_GENERIC_ERROR,
11034 _("Remote target failed to process qGetTLSAddr request"));
11037 throw_error (TLS_GENERIC_ERROR,
11038 _("TLS not supported or disabled on this target"));
11043 /* Provide thread local base, i.e. Thread Information Block address.
11044 Returns 1 if ptid is found and thread_local_base is non zero. */
11047 remote_get_tib_address (struct target_ops *self, ptid_t ptid, CORE_ADDR *addr)
11049 if (packet_support (PACKET_qGetTIBAddr) != PACKET_DISABLE)
11051 struct remote_state *rs = get_remote_state ();
11053 char *endp = rs->buf + get_remote_packet_size ();
11054 enum packet_result result;
11056 strcpy (p, "qGetTIBAddr:");
11058 p = write_ptid (p, endp, ptid);
11062 getpkt (&rs->buf, &rs->buf_size, 0);
11063 result = packet_ok (rs->buf,
11064 &remote_protocol_packets[PACKET_qGetTIBAddr]);
11065 if (result == PACKET_OK)
11069 unpack_varlen_hex (rs->buf, &result);
11071 *addr = (CORE_ADDR) result;
11074 else if (result == PACKET_UNKNOWN)
11075 error (_("Remote target doesn't support qGetTIBAddr packet"));
11077 error (_("Remote target failed to process qGetTIBAddr request"));
11080 error (_("qGetTIBAddr not supported or disabled on this target"));
11085 /* Support for inferring a target description based on the current
11086 architecture and the size of a 'g' packet. While the 'g' packet
11087 can have any size (since optional registers can be left off the
11088 end), some sizes are easily recognizable given knowledge of the
11089 approximate architecture. */
11091 struct remote_g_packet_guess
11094 const struct target_desc *tdesc;
11096 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
11097 DEF_VEC_O(remote_g_packet_guess_s);
11099 struct remote_g_packet_data
11101 VEC(remote_g_packet_guess_s) *guesses;
11104 static struct gdbarch_data *remote_g_packet_data_handle;
11107 remote_g_packet_data_init (struct obstack *obstack)
11109 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
11113 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
11114 const struct target_desc *tdesc)
11116 struct remote_g_packet_data *data
11117 = ((struct remote_g_packet_data *)
11118 gdbarch_data (gdbarch, remote_g_packet_data_handle));
11119 struct remote_g_packet_guess new_guess, *guess;
11122 gdb_assert (tdesc != NULL);
11125 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
11127 if (guess->bytes == bytes)
11128 internal_error (__FILE__, __LINE__,
11129 _("Duplicate g packet description added for size %d"),
11132 new_guess.bytes = bytes;
11133 new_guess.tdesc = tdesc;
11134 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
11137 /* Return 1 if remote_read_description would do anything on this target
11138 and architecture, 0 otherwise. */
11141 remote_read_description_p (struct target_ops *target)
11143 struct remote_g_packet_data *data
11144 = ((struct remote_g_packet_data *)
11145 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
11147 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
11153 static const struct target_desc *
11154 remote_read_description (struct target_ops *target)
11156 struct remote_g_packet_data *data
11157 = ((struct remote_g_packet_data *)
11158 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
11160 /* Do not try this during initial connection, when we do not know
11161 whether there is a running but stopped thread. */
11162 if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
11163 return target->beneath->to_read_description (target->beneath);
11165 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
11167 struct remote_g_packet_guess *guess;
11169 int bytes = send_g_packet ();
11172 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
11174 if (guess->bytes == bytes)
11175 return guess->tdesc;
11177 /* We discard the g packet. A minor optimization would be to
11178 hold on to it, and fill the register cache once we have selected
11179 an architecture, but it's too tricky to do safely. */
11182 return target->beneath->to_read_description (target->beneath);
11185 /* Remote file transfer support. This is host-initiated I/O, not
11186 target-initiated; for target-initiated, see remote-fileio.c. */
11188 /* If *LEFT is at least the length of STRING, copy STRING to
11189 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11190 decrease *LEFT. Otherwise raise an error. */
11193 remote_buffer_add_string (char **buffer, int *left, const char *string)
11195 int len = strlen (string);
11198 error (_("Packet too long for target."));
11200 memcpy (*buffer, string, len);
11204 /* NUL-terminate the buffer as a convenience, if there is
11210 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11211 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11212 decrease *LEFT. Otherwise raise an error. */
11215 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
11218 if (2 * len > *left)
11219 error (_("Packet too long for target."));
11221 bin2hex (bytes, *buffer, len);
11222 *buffer += 2 * len;
11225 /* NUL-terminate the buffer as a convenience, if there is
11231 /* If *LEFT is large enough, convert VALUE to hex and add it to
11232 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11233 decrease *LEFT. Otherwise raise an error. */
11236 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
11238 int len = hexnumlen (value);
11241 error (_("Packet too long for target."));
11243 hexnumstr (*buffer, value);
11247 /* NUL-terminate the buffer as a convenience, if there is
11253 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11254 value, *REMOTE_ERRNO to the remote error number or zero if none
11255 was included, and *ATTACHMENT to point to the start of the annex
11256 if any. The length of the packet isn't needed here; there may
11257 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11259 Return 0 if the packet could be parsed, -1 if it could not. If
11260 -1 is returned, the other variables may not be initialized. */
11263 remote_hostio_parse_result (char *buffer, int *retcode,
11264 int *remote_errno, char **attachment)
11269 *attachment = NULL;
11271 if (buffer[0] != 'F')
11275 *retcode = strtol (&buffer[1], &p, 16);
11276 if (errno != 0 || p == &buffer[1])
11279 /* Check for ",errno". */
11283 *remote_errno = strtol (p + 1, &p2, 16);
11284 if (errno != 0 || p + 1 == p2)
11289 /* Check for ";attachment". If there is no attachment, the
11290 packet should end here. */
11293 *attachment = p + 1;
11296 else if (*p == '\0')
11302 /* Send a prepared I/O packet to the target and read its response.
11303 The prepared packet is in the global RS->BUF before this function
11304 is called, and the answer is there when we return.
11306 COMMAND_BYTES is the length of the request to send, which may include
11307 binary data. WHICH_PACKET is the packet configuration to check
11308 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11309 is set to the error number and -1 is returned. Otherwise the value
11310 returned by the function is returned.
11312 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11313 attachment is expected; an error will be reported if there's a
11314 mismatch. If one is found, *ATTACHMENT will be set to point into
11315 the packet buffer and *ATTACHMENT_LEN will be set to the
11316 attachment's length. */
11319 remote_hostio_send_command (int command_bytes, int which_packet,
11320 int *remote_errno, char **attachment,
11321 int *attachment_len)
11323 struct remote_state *rs = get_remote_state ();
11324 int ret, bytes_read;
11325 char *attachment_tmp;
11327 if (!rs->remote_desc
11328 || packet_support (which_packet) == PACKET_DISABLE)
11330 *remote_errno = FILEIO_ENOSYS;
11334 putpkt_binary (rs->buf, command_bytes);
11335 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
11337 /* If it timed out, something is wrong. Don't try to parse the
11339 if (bytes_read < 0)
11341 *remote_errno = FILEIO_EINVAL;
11345 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
11348 *remote_errno = FILEIO_EINVAL;
11350 case PACKET_UNKNOWN:
11351 *remote_errno = FILEIO_ENOSYS;
11357 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
11360 *remote_errno = FILEIO_EINVAL;
11364 /* Make sure we saw an attachment if and only if we expected one. */
11365 if ((attachment_tmp == NULL && attachment != NULL)
11366 || (attachment_tmp != NULL && attachment == NULL))
11368 *remote_errno = FILEIO_EINVAL;
11372 /* If an attachment was found, it must point into the packet buffer;
11373 work out how many bytes there were. */
11374 if (attachment_tmp != NULL)
11376 *attachment = attachment_tmp;
11377 *attachment_len = bytes_read - (*attachment - rs->buf);
11383 /* Invalidate the readahead cache. */
11386 readahead_cache_invalidate (void)
11388 struct remote_state *rs = get_remote_state ();
11390 rs->readahead_cache.fd = -1;
11393 /* Invalidate the readahead cache if it is holding data for FD. */
11396 readahead_cache_invalidate_fd (int fd)
11398 struct remote_state *rs = get_remote_state ();
11400 if (rs->readahead_cache.fd == fd)
11401 rs->readahead_cache.fd = -1;
11404 /* Set the filesystem remote_hostio functions that take FILENAME
11405 arguments will use. Return 0 on success, or -1 if an error
11406 occurs (and set *REMOTE_ERRNO). */
11409 remote_hostio_set_filesystem (struct inferior *inf, int *remote_errno)
11411 struct remote_state *rs = get_remote_state ();
11412 int required_pid = (inf == NULL || inf->fake_pid_p) ? 0 : inf->pid;
11414 int left = get_remote_packet_size () - 1;
11418 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
11421 if (rs->fs_pid != -1 && required_pid == rs->fs_pid)
11424 remote_buffer_add_string (&p, &left, "vFile:setfs:");
11426 xsnprintf (arg, sizeof (arg), "%x", required_pid);
11427 remote_buffer_add_string (&p, &left, arg);
11429 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_setfs,
11430 remote_errno, NULL, NULL);
11432 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
11436 rs->fs_pid = required_pid;
11441 /* Implementation of to_fileio_open. */
11444 remote_hostio_open (struct target_ops *self,
11445 struct inferior *inf, const char *filename,
11446 int flags, int mode, int warn_if_slow,
11449 struct remote_state *rs = get_remote_state ();
11451 int left = get_remote_packet_size () - 1;
11455 static int warning_issued = 0;
11457 printf_unfiltered (_("Reading %s from remote target...\n"),
11460 if (!warning_issued)
11462 warning (_("File transfers from remote targets can be slow."
11463 " Use \"set sysroot\" to access files locally"
11465 warning_issued = 1;
11469 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11472 remote_buffer_add_string (&p, &left, "vFile:open:");
11474 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11475 strlen (filename));
11476 remote_buffer_add_string (&p, &left, ",");
11478 remote_buffer_add_int (&p, &left, flags);
11479 remote_buffer_add_string (&p, &left, ",");
11481 remote_buffer_add_int (&p, &left, mode);
11483 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
11484 remote_errno, NULL, NULL);
11487 /* Implementation of to_fileio_pwrite. */
11490 remote_hostio_pwrite (struct target_ops *self,
11491 int fd, const gdb_byte *write_buf, int len,
11492 ULONGEST offset, int *remote_errno)
11494 struct remote_state *rs = get_remote_state ();
11496 int left = get_remote_packet_size ();
11499 readahead_cache_invalidate_fd (fd);
11501 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
11503 remote_buffer_add_int (&p, &left, fd);
11504 remote_buffer_add_string (&p, &left, ",");
11506 remote_buffer_add_int (&p, &left, offset);
11507 remote_buffer_add_string (&p, &left, ",");
11509 p += remote_escape_output (write_buf, len, 1, (gdb_byte *) p, &out_len,
11510 get_remote_packet_size () - (p - rs->buf));
11512 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
11513 remote_errno, NULL, NULL);
11516 /* Helper for the implementation of to_fileio_pread. Read the file
11517 from the remote side with vFile:pread. */
11520 remote_hostio_pread_vFile (struct target_ops *self,
11521 int fd, gdb_byte *read_buf, int len,
11522 ULONGEST offset, int *remote_errno)
11524 struct remote_state *rs = get_remote_state ();
11527 int left = get_remote_packet_size ();
11528 int ret, attachment_len;
11531 remote_buffer_add_string (&p, &left, "vFile:pread:");
11533 remote_buffer_add_int (&p, &left, fd);
11534 remote_buffer_add_string (&p, &left, ",");
11536 remote_buffer_add_int (&p, &left, len);
11537 remote_buffer_add_string (&p, &left, ",");
11539 remote_buffer_add_int (&p, &left, offset);
11541 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
11542 remote_errno, &attachment,
11548 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11550 if (read_len != ret)
11551 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
11556 /* Serve pread from the readahead cache. Returns number of bytes
11557 read, or 0 if the request can't be served from the cache. */
11560 remote_hostio_pread_from_cache (struct remote_state *rs,
11561 int fd, gdb_byte *read_buf, size_t len,
11564 struct readahead_cache *cache = &rs->readahead_cache;
11566 if (cache->fd == fd
11567 && cache->offset <= offset
11568 && offset < cache->offset + cache->bufsize)
11570 ULONGEST max = cache->offset + cache->bufsize;
11572 if (offset + len > max)
11573 len = max - offset;
11575 memcpy (read_buf, cache->buf + offset - cache->offset, len);
11582 /* Implementation of to_fileio_pread. */
11585 remote_hostio_pread (struct target_ops *self,
11586 int fd, gdb_byte *read_buf, int len,
11587 ULONGEST offset, int *remote_errno)
11590 struct remote_state *rs = get_remote_state ();
11591 struct readahead_cache *cache = &rs->readahead_cache;
11593 ret = remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset);
11596 cache->hit_count++;
11599 fprintf_unfiltered (gdb_stdlog, "readahead cache hit %s\n",
11600 pulongest (cache->hit_count));
11604 cache->miss_count++;
11606 fprintf_unfiltered (gdb_stdlog, "readahead cache miss %s\n",
11607 pulongest (cache->miss_count));
11610 cache->offset = offset;
11611 cache->bufsize = get_remote_packet_size ();
11612 cache->buf = (gdb_byte *) xrealloc (cache->buf, cache->bufsize);
11614 ret = remote_hostio_pread_vFile (self, cache->fd, cache->buf, cache->bufsize,
11615 cache->offset, remote_errno);
11618 readahead_cache_invalidate_fd (fd);
11622 cache->bufsize = ret;
11623 return remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset);
11626 /* Implementation of to_fileio_close. */
11629 remote_hostio_close (struct target_ops *self, int fd, int *remote_errno)
11631 struct remote_state *rs = get_remote_state ();
11633 int left = get_remote_packet_size () - 1;
11635 readahead_cache_invalidate_fd (fd);
11637 remote_buffer_add_string (&p, &left, "vFile:close:");
11639 remote_buffer_add_int (&p, &left, fd);
11641 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
11642 remote_errno, NULL, NULL);
11645 /* Implementation of to_fileio_unlink. */
11648 remote_hostio_unlink (struct target_ops *self,
11649 struct inferior *inf, const char *filename,
11652 struct remote_state *rs = get_remote_state ();
11654 int left = get_remote_packet_size () - 1;
11656 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11659 remote_buffer_add_string (&p, &left, "vFile:unlink:");
11661 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11662 strlen (filename));
11664 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
11665 remote_errno, NULL, NULL);
11668 /* Implementation of to_fileio_readlink. */
11671 remote_hostio_readlink (struct target_ops *self,
11672 struct inferior *inf, const char *filename,
11675 struct remote_state *rs = get_remote_state ();
11678 int left = get_remote_packet_size ();
11679 int len, attachment_len;
11683 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11686 remote_buffer_add_string (&p, &left, "vFile:readlink:");
11688 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11689 strlen (filename));
11691 len = remote_hostio_send_command (p - rs->buf, PACKET_vFile_readlink,
11692 remote_errno, &attachment,
11698 ret = (char *) xmalloc (len + 1);
11700 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11701 (gdb_byte *) ret, len);
11702 if (read_len != len)
11703 error (_("Readlink returned %d, but %d bytes."), len, read_len);
11709 /* Implementation of to_fileio_fstat. */
11712 remote_hostio_fstat (struct target_ops *self,
11713 int fd, struct stat *st,
11716 struct remote_state *rs = get_remote_state ();
11718 int left = get_remote_packet_size ();
11719 int attachment_len, ret;
11721 struct fio_stat fst;
11724 remote_buffer_add_string (&p, &left, "vFile:fstat:");
11726 remote_buffer_add_int (&p, &left, fd);
11728 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_fstat,
11729 remote_errno, &attachment,
11733 if (*remote_errno != FILEIO_ENOSYS)
11736 /* Strictly we should return -1, ENOSYS here, but when
11737 "set sysroot remote:" was implemented in August 2008
11738 BFD's need for a stat function was sidestepped with
11739 this hack. This was not remedied until March 2015
11740 so we retain the previous behavior to avoid breaking
11743 Note that the memset is a March 2015 addition; older
11744 GDBs set st_size *and nothing else* so the structure
11745 would have garbage in all other fields. This might
11746 break something but retaining the previous behavior
11747 here would be just too wrong. */
11749 memset (st, 0, sizeof (struct stat));
11750 st->st_size = INT_MAX;
11754 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11755 (gdb_byte *) &fst, sizeof (fst));
11757 if (read_len != ret)
11758 error (_("vFile:fstat returned %d, but %d bytes."), ret, read_len);
11760 if (read_len != sizeof (fst))
11761 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11762 read_len, (int) sizeof (fst));
11764 remote_fileio_to_host_stat (&fst, st);
11769 /* Implementation of to_filesystem_is_local. */
11772 remote_filesystem_is_local (struct target_ops *self)
11774 /* Valgrind GDB presents itself as a remote target but works
11775 on the local filesystem: it does not implement remote get
11776 and users are not expected to set a sysroot. To handle
11777 this case we treat the remote filesystem as local if the
11778 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11779 does not support vFile:open. */
11780 if (strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) == 0)
11782 enum packet_support ps = packet_support (PACKET_vFile_open);
11784 if (ps == PACKET_SUPPORT_UNKNOWN)
11786 int fd, remote_errno;
11788 /* Try opening a file to probe support. The supplied
11789 filename is irrelevant, we only care about whether
11790 the stub recognizes the packet or not. */
11791 fd = remote_hostio_open (self, NULL, "just probing",
11792 FILEIO_O_RDONLY, 0700, 0,
11796 remote_hostio_close (self, fd, &remote_errno);
11798 ps = packet_support (PACKET_vFile_open);
11801 if (ps == PACKET_DISABLE)
11803 static int warning_issued = 0;
11805 if (!warning_issued)
11807 warning (_("remote target does not support file"
11808 " transfer, attempting to access files"
11809 " from local filesystem."));
11810 warning_issued = 1;
11821 remote_fileio_errno_to_host (int errnum)
11827 case FILEIO_ENOENT:
11835 case FILEIO_EACCES:
11837 case FILEIO_EFAULT:
11841 case FILEIO_EEXIST:
11843 case FILEIO_ENODEV:
11845 case FILEIO_ENOTDIR:
11847 case FILEIO_EISDIR:
11849 case FILEIO_EINVAL:
11851 case FILEIO_ENFILE:
11853 case FILEIO_EMFILE:
11857 case FILEIO_ENOSPC:
11859 case FILEIO_ESPIPE:
11863 case FILEIO_ENOSYS:
11865 case FILEIO_ENAMETOOLONG:
11866 return ENAMETOOLONG;
11872 remote_hostio_error (int errnum)
11874 int host_error = remote_fileio_errno_to_host (errnum);
11876 if (host_error == -1)
11877 error (_("Unknown remote I/O error %d"), errnum);
11879 error (_("Remote I/O error: %s"), safe_strerror (host_error));
11883 remote_hostio_close_cleanup (void *opaque)
11885 int fd = *(int *) opaque;
11888 remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno);
11892 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
11894 struct cleanup *back_to, *close_cleanup;
11895 int retcode, fd, remote_errno, bytes, io_size;
11898 int bytes_in_buffer;
11901 struct remote_state *rs = get_remote_state ();
11903 if (!rs->remote_desc)
11904 error (_("command can only be used with remote target"));
11906 file = gdb_fopen_cloexec (local_file, "rb");
11908 perror_with_name (local_file);
11909 back_to = make_cleanup_fclose (file);
11911 fd = remote_hostio_open (find_target_at (process_stratum), NULL,
11912 remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
11914 0700, 0, &remote_errno);
11916 remote_hostio_error (remote_errno);
11918 /* Send up to this many bytes at once. They won't all fit in the
11919 remote packet limit, so we'll transfer slightly fewer. */
11920 io_size = get_remote_packet_size ();
11921 buffer = (gdb_byte *) xmalloc (io_size);
11922 make_cleanup (xfree, buffer);
11924 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
11926 bytes_in_buffer = 0;
11929 while (bytes_in_buffer || !saw_eof)
11933 bytes = fread (buffer + bytes_in_buffer, 1,
11934 io_size - bytes_in_buffer,
11939 error (_("Error reading %s."), local_file);
11942 /* EOF. Unless there is something still in the
11943 buffer from the last iteration, we are done. */
11945 if (bytes_in_buffer == 0)
11953 bytes += bytes_in_buffer;
11954 bytes_in_buffer = 0;
11956 retcode = remote_hostio_pwrite (find_target_at (process_stratum),
11958 offset, &remote_errno);
11961 remote_hostio_error (remote_errno);
11962 else if (retcode == 0)
11963 error (_("Remote write of %d bytes returned 0!"), bytes);
11964 else if (retcode < bytes)
11966 /* Short write. Save the rest of the read data for the next
11968 bytes_in_buffer = bytes - retcode;
11969 memmove (buffer, buffer + retcode, bytes_in_buffer);
11975 discard_cleanups (close_cleanup);
11976 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
11977 remote_hostio_error (remote_errno);
11980 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
11981 do_cleanups (back_to);
11985 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
11987 struct cleanup *back_to, *close_cleanup;
11988 int fd, remote_errno, bytes, io_size;
11992 struct remote_state *rs = get_remote_state ();
11994 if (!rs->remote_desc)
11995 error (_("command can only be used with remote target"));
11997 fd = remote_hostio_open (find_target_at (process_stratum), NULL,
11998 remote_file, FILEIO_O_RDONLY, 0, 0,
12001 remote_hostio_error (remote_errno);
12003 file = gdb_fopen_cloexec (local_file, "wb");
12005 perror_with_name (local_file);
12006 back_to = make_cleanup_fclose (file);
12008 /* Send up to this many bytes at once. They won't all fit in the
12009 remote packet limit, so we'll transfer slightly fewer. */
12010 io_size = get_remote_packet_size ();
12011 buffer = (gdb_byte *) xmalloc (io_size);
12012 make_cleanup (xfree, buffer);
12014 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
12019 bytes = remote_hostio_pread (find_target_at (process_stratum),
12020 fd, buffer, io_size, offset, &remote_errno);
12022 /* Success, but no bytes, means end-of-file. */
12025 remote_hostio_error (remote_errno);
12029 bytes = fwrite (buffer, 1, bytes, file);
12031 perror_with_name (local_file);
12034 discard_cleanups (close_cleanup);
12035 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
12036 remote_hostio_error (remote_errno);
12039 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
12040 do_cleanups (back_to);
12044 remote_file_delete (const char *remote_file, int from_tty)
12046 int retcode, remote_errno;
12047 struct remote_state *rs = get_remote_state ();
12049 if (!rs->remote_desc)
12050 error (_("command can only be used with remote target"));
12052 retcode = remote_hostio_unlink (find_target_at (process_stratum),
12053 NULL, remote_file, &remote_errno);
12055 remote_hostio_error (remote_errno);
12058 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
12062 remote_put_command (char *args, int from_tty)
12064 struct cleanup *back_to;
12068 error_no_arg (_("file to put"));
12070 argv = gdb_buildargv (args);
12071 back_to = make_cleanup_freeargv (argv);
12072 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
12073 error (_("Invalid parameters to remote put"));
12075 remote_file_put (argv[0], argv[1], from_tty);
12077 do_cleanups (back_to);
12081 remote_get_command (char *args, int from_tty)
12083 struct cleanup *back_to;
12087 error_no_arg (_("file to get"));
12089 argv = gdb_buildargv (args);
12090 back_to = make_cleanup_freeargv (argv);
12091 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
12092 error (_("Invalid parameters to remote get"));
12094 remote_file_get (argv[0], argv[1], from_tty);
12096 do_cleanups (back_to);
12100 remote_delete_command (char *args, int from_tty)
12102 struct cleanup *back_to;
12106 error_no_arg (_("file to delete"));
12108 argv = gdb_buildargv (args);
12109 back_to = make_cleanup_freeargv (argv);
12110 if (argv[0] == NULL || argv[1] != NULL)
12111 error (_("Invalid parameters to remote delete"));
12113 remote_file_delete (argv[0], from_tty);
12115 do_cleanups (back_to);
12119 remote_command (char *args, int from_tty)
12121 help_list (remote_cmdlist, "remote ", all_commands, gdb_stdout);
12125 remote_can_execute_reverse (struct target_ops *self)
12127 if (packet_support (PACKET_bs) == PACKET_ENABLE
12128 || packet_support (PACKET_bc) == PACKET_ENABLE)
12135 remote_supports_non_stop (struct target_ops *self)
12141 remote_supports_disable_randomization (struct target_ops *self)
12143 /* Only supported in extended mode. */
12148 remote_supports_multi_process (struct target_ops *self)
12150 struct remote_state *rs = get_remote_state ();
12152 return remote_multi_process_p (rs);
12156 remote_supports_cond_tracepoints (void)
12158 return packet_support (PACKET_ConditionalTracepoints) == PACKET_ENABLE;
12162 remote_supports_cond_breakpoints (struct target_ops *self)
12164 return packet_support (PACKET_ConditionalBreakpoints) == PACKET_ENABLE;
12168 remote_supports_fast_tracepoints (void)
12170 return packet_support (PACKET_FastTracepoints) == PACKET_ENABLE;
12174 remote_supports_static_tracepoints (void)
12176 return packet_support (PACKET_StaticTracepoints) == PACKET_ENABLE;
12180 remote_supports_install_in_trace (void)
12182 return packet_support (PACKET_InstallInTrace) == PACKET_ENABLE;
12186 remote_supports_enable_disable_tracepoint (struct target_ops *self)
12188 return (packet_support (PACKET_EnableDisableTracepoints_feature)
12193 remote_supports_string_tracing (struct target_ops *self)
12195 return packet_support (PACKET_tracenz_feature) == PACKET_ENABLE;
12199 remote_can_run_breakpoint_commands (struct target_ops *self)
12201 return packet_support (PACKET_BreakpointCommands) == PACKET_ENABLE;
12205 remote_trace_init (struct target_ops *self)
12208 remote_get_noisy_reply (&target_buf, &target_buf_size);
12209 if (strcmp (target_buf, "OK") != 0)
12210 error (_("Target does not support this command."));
12213 static void free_actions_list (char **actions_list);
12214 static void free_actions_list_cleanup_wrapper (void *);
12216 free_actions_list_cleanup_wrapper (void *al)
12218 free_actions_list ((char **) al);
12222 free_actions_list (char **actions_list)
12226 if (actions_list == 0)
12229 for (ndx = 0; actions_list[ndx]; ndx++)
12230 xfree (actions_list[ndx]);
12232 xfree (actions_list);
12235 /* Recursive routine to walk through command list including loops, and
12236 download packets for each command. */
12239 remote_download_command_source (int num, ULONGEST addr,
12240 struct command_line *cmds)
12242 struct remote_state *rs = get_remote_state ();
12243 struct command_line *cmd;
12245 for (cmd = cmds; cmd; cmd = cmd->next)
12247 QUIT; /* Allow user to bail out with ^C. */
12248 strcpy (rs->buf, "QTDPsrc:");
12249 encode_source_string (num, addr, "cmd", cmd->line,
12250 rs->buf + strlen (rs->buf),
12251 rs->buf_size - strlen (rs->buf));
12253 remote_get_noisy_reply (&target_buf, &target_buf_size);
12254 if (strcmp (target_buf, "OK"))
12255 warning (_("Target does not support source download."));
12257 if (cmd->control_type == while_control
12258 || cmd->control_type == while_stepping_control)
12260 remote_download_command_source (num, addr, *cmd->body_list);
12262 QUIT; /* Allow user to bail out with ^C. */
12263 strcpy (rs->buf, "QTDPsrc:");
12264 encode_source_string (num, addr, "cmd", "end",
12265 rs->buf + strlen (rs->buf),
12266 rs->buf_size - strlen (rs->buf));
12268 remote_get_noisy_reply (&target_buf, &target_buf_size);
12269 if (strcmp (target_buf, "OK"))
12270 warning (_("Target does not support source download."));
12276 remote_download_tracepoint (struct target_ops *self, struct bp_location *loc)
12278 #define BUF_SIZE 2048
12282 char buf[BUF_SIZE];
12283 char **tdp_actions;
12284 char **stepping_actions;
12286 struct cleanup *old_chain = NULL;
12288 struct breakpoint *b = loc->owner;
12289 struct tracepoint *t = (struct tracepoint *) b;
12291 encode_actions_rsp (loc, &tdp_actions, &stepping_actions);
12292 old_chain = make_cleanup (free_actions_list_cleanup_wrapper,
12294 (void) make_cleanup (free_actions_list_cleanup_wrapper,
12297 tpaddr = loc->address;
12298 sprintf_vma (addrbuf, tpaddr);
12299 xsnprintf (buf, BUF_SIZE, "QTDP:%x:%s:%c:%lx:%x", b->number,
12300 addrbuf, /* address */
12301 (b->enable_state == bp_enabled ? 'E' : 'D'),
12302 t->step_count, t->pass_count);
12303 /* Fast tracepoints are mostly handled by the target, but we can
12304 tell the target how big of an instruction block should be moved
12306 if (b->type == bp_fast_tracepoint)
12308 /* Only test for support at download time; we may not know
12309 target capabilities at definition time. */
12310 if (remote_supports_fast_tracepoints ())
12312 if (gdbarch_fast_tracepoint_valid_at (loc->gdbarch, tpaddr,
12314 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":F%x",
12315 gdb_insn_length (loc->gdbarch, tpaddr));
12317 /* If it passed validation at definition but fails now,
12318 something is very wrong. */
12319 internal_error (__FILE__, __LINE__,
12320 _("Fast tracepoint not "
12321 "valid during download"));
12324 /* Fast tracepoints are functionally identical to regular
12325 tracepoints, so don't take lack of support as a reason to
12326 give up on the trace run. */
12327 warning (_("Target does not support fast tracepoints, "
12328 "downloading %d as regular tracepoint"), b->number);
12330 else if (b->type == bp_static_tracepoint)
12332 /* Only test for support at download time; we may not know
12333 target capabilities at definition time. */
12334 if (remote_supports_static_tracepoints ())
12336 struct static_tracepoint_marker marker;
12338 if (target_static_tracepoint_marker_at (tpaddr, &marker))
12339 strcat (buf, ":S");
12341 error (_("Static tracepoint not valid during download"));
12344 /* Fast tracepoints are functionally identical to regular
12345 tracepoints, so don't take lack of support as a reason
12346 to give up on the trace run. */
12347 error (_("Target does not support static tracepoints"));
12349 /* If the tracepoint has a conditional, make it into an agent
12350 expression and append to the definition. */
12353 /* Only test support at download time, we may not know target
12354 capabilities at definition time. */
12355 if (remote_supports_cond_tracepoints ())
12357 agent_expr_up aexpr = gen_eval_for_expr (tpaddr, loc->cond.get ());
12358 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":X%x,",
12360 pkt = buf + strlen (buf);
12361 for (ndx = 0; ndx < aexpr->len; ++ndx)
12362 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
12366 warning (_("Target does not support conditional tracepoints, "
12367 "ignoring tp %d cond"), b->number);
12370 if (b->commands || *default_collect)
12373 remote_get_noisy_reply (&target_buf, &target_buf_size);
12374 if (strcmp (target_buf, "OK"))
12375 error (_("Target does not support tracepoints."));
12377 /* do_single_steps (t); */
12380 for (ndx = 0; tdp_actions[ndx]; ndx++)
12382 QUIT; /* Allow user to bail out with ^C. */
12383 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%c",
12384 b->number, addrbuf, /* address */
12386 ((tdp_actions[ndx + 1] || stepping_actions)
12389 remote_get_noisy_reply (&target_buf,
12391 if (strcmp (target_buf, "OK"))
12392 error (_("Error on target while setting tracepoints."));
12395 if (stepping_actions)
12397 for (ndx = 0; stepping_actions[ndx]; ndx++)
12399 QUIT; /* Allow user to bail out with ^C. */
12400 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%s%s",
12401 b->number, addrbuf, /* address */
12402 ((ndx == 0) ? "S" : ""),
12403 stepping_actions[ndx],
12404 (stepping_actions[ndx + 1] ? "-" : ""));
12406 remote_get_noisy_reply (&target_buf,
12408 if (strcmp (target_buf, "OK"))
12409 error (_("Error on target while setting tracepoints."));
12413 if (packet_support (PACKET_TracepointSource) == PACKET_ENABLE)
12415 if (b->location != NULL)
12417 strcpy (buf, "QTDPsrc:");
12418 encode_source_string (b->number, loc->address, "at",
12419 event_location_to_string (b->location.get ()),
12420 buf + strlen (buf), 2048 - strlen (buf));
12422 remote_get_noisy_reply (&target_buf, &target_buf_size);
12423 if (strcmp (target_buf, "OK"))
12424 warning (_("Target does not support source download."));
12426 if (b->cond_string)
12428 strcpy (buf, "QTDPsrc:");
12429 encode_source_string (b->number, loc->address,
12430 "cond", b->cond_string, buf + strlen (buf),
12431 2048 - strlen (buf));
12433 remote_get_noisy_reply (&target_buf, &target_buf_size);
12434 if (strcmp (target_buf, "OK"))
12435 warning (_("Target does not support source download."));
12437 remote_download_command_source (b->number, loc->address,
12438 breakpoint_commands (b));
12441 do_cleanups (old_chain);
12445 remote_can_download_tracepoint (struct target_ops *self)
12447 struct remote_state *rs = get_remote_state ();
12448 struct trace_status *ts;
12451 /* Don't try to install tracepoints until we've relocated our
12452 symbols, and fetched and merged the target's tracepoint list with
12454 if (rs->starting_up)
12457 ts = current_trace_status ();
12458 status = remote_get_trace_status (self, ts);
12460 if (status == -1 || !ts->running_known || !ts->running)
12463 /* If we are in a tracing experiment, but remote stub doesn't support
12464 installing tracepoint in trace, we have to return. */
12465 if (!remote_supports_install_in_trace ())
12473 remote_download_trace_state_variable (struct target_ops *self,
12474 struct trace_state_variable *tsv)
12476 struct remote_state *rs = get_remote_state ();
12479 xsnprintf (rs->buf, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12480 tsv->number, phex ((ULONGEST) tsv->initial_value, 8),
12482 p = rs->buf + strlen (rs->buf);
12483 if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ())
12484 error (_("Trace state variable name too long for tsv definition packet"));
12485 p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, strlen (tsv->name));
12488 remote_get_noisy_reply (&target_buf, &target_buf_size);
12489 if (*target_buf == '\0')
12490 error (_("Target does not support this command."));
12491 if (strcmp (target_buf, "OK") != 0)
12492 error (_("Error on target while downloading trace state variable."));
12496 remote_enable_tracepoint (struct target_ops *self,
12497 struct bp_location *location)
12499 struct remote_state *rs = get_remote_state ();
12502 sprintf_vma (addr_buf, location->address);
12503 xsnprintf (rs->buf, get_remote_packet_size (), "QTEnable:%x:%s",
12504 location->owner->number, addr_buf);
12506 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
12507 if (*rs->buf == '\0')
12508 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12509 if (strcmp (rs->buf, "OK") != 0)
12510 error (_("Error on target while enabling tracepoint."));
12514 remote_disable_tracepoint (struct target_ops *self,
12515 struct bp_location *location)
12517 struct remote_state *rs = get_remote_state ();
12520 sprintf_vma (addr_buf, location->address);
12521 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisable:%x:%s",
12522 location->owner->number, addr_buf);
12524 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
12525 if (*rs->buf == '\0')
12526 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12527 if (strcmp (rs->buf, "OK") != 0)
12528 error (_("Error on target while disabling tracepoint."));
12532 remote_trace_set_readonly_regions (struct target_ops *self)
12536 bfd_size_type size;
12542 return; /* No information to give. */
12544 strcpy (target_buf, "QTro");
12545 offset = strlen (target_buf);
12546 for (s = exec_bfd->sections; s; s = s->next)
12548 char tmp1[40], tmp2[40];
12551 if ((s->flags & SEC_LOAD) == 0 ||
12552 /* (s->flags & SEC_CODE) == 0 || */
12553 (s->flags & SEC_READONLY) == 0)
12557 vma = bfd_get_section_vma (abfd, s);
12558 size = bfd_get_section_size (s);
12559 sprintf_vma (tmp1, vma);
12560 sprintf_vma (tmp2, vma + size);
12561 sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2);
12562 if (offset + sec_length + 1 > target_buf_size)
12564 if (packet_support (PACKET_qXfer_traceframe_info) != PACKET_ENABLE)
12566 Too many sections for read-only sections definition packet."));
12569 xsnprintf (target_buf + offset, target_buf_size - offset, ":%s,%s",
12571 offset += sec_length;
12575 putpkt (target_buf);
12576 getpkt (&target_buf, &target_buf_size, 0);
12581 remote_trace_start (struct target_ops *self)
12583 putpkt ("QTStart");
12584 remote_get_noisy_reply (&target_buf, &target_buf_size);
12585 if (*target_buf == '\0')
12586 error (_("Target does not support this command."));
12587 if (strcmp (target_buf, "OK") != 0)
12588 error (_("Bogus reply from target: %s"), target_buf);
12592 remote_get_trace_status (struct target_ops *self, struct trace_status *ts)
12594 /* Initialize it just to avoid a GCC false warning. */
12596 /* FIXME we need to get register block size some other way. */
12597 extern int trace_regblock_size;
12598 enum packet_result result;
12600 if (packet_support (PACKET_qTStatus) == PACKET_DISABLE)
12603 trace_regblock_size = get_remote_arch_state ()->sizeof_g_packet;
12605 putpkt ("qTStatus");
12609 p = remote_get_noisy_reply (&target_buf, &target_buf_size);
12611 CATCH (ex, RETURN_MASK_ERROR)
12613 if (ex.error != TARGET_CLOSE_ERROR)
12615 exception_fprintf (gdb_stderr, ex, "qTStatus: ");
12618 throw_exception (ex);
12622 result = packet_ok (p, &remote_protocol_packets[PACKET_qTStatus]);
12624 /* If the remote target doesn't do tracing, flag it. */
12625 if (result == PACKET_UNKNOWN)
12628 /* We're working with a live target. */
12629 ts->filename = NULL;
12632 error (_("Bogus trace status reply from target: %s"), target_buf);
12634 /* Function 'parse_trace_status' sets default value of each field of
12635 'ts' at first, so we don't have to do it here. */
12636 parse_trace_status (p, ts);
12638 return ts->running;
12642 remote_get_tracepoint_status (struct target_ops *self, struct breakpoint *bp,
12643 struct uploaded_tp *utp)
12645 struct remote_state *rs = get_remote_state ();
12647 struct bp_location *loc;
12648 struct tracepoint *tp = (struct tracepoint *) bp;
12649 size_t size = get_remote_packet_size ();
12653 tp->base.hit_count = 0;
12654 tp->traceframe_usage = 0;
12655 for (loc = tp->base.loc; loc; loc = loc->next)
12657 /* If the tracepoint was never downloaded, don't go asking for
12659 if (tp->number_on_target == 0)
12661 xsnprintf (rs->buf, size, "qTP:%x:%s", tp->number_on_target,
12662 phex_nz (loc->address, 0));
12664 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12665 if (reply && *reply)
12668 parse_tracepoint_status (reply + 1, bp, utp);
12674 utp->hit_count = 0;
12675 utp->traceframe_usage = 0;
12676 xsnprintf (rs->buf, size, "qTP:%x:%s", utp->number,
12677 phex_nz (utp->addr, 0));
12679 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12680 if (reply && *reply)
12683 parse_tracepoint_status (reply + 1, bp, utp);
12689 remote_trace_stop (struct target_ops *self)
12692 remote_get_noisy_reply (&target_buf, &target_buf_size);
12693 if (*target_buf == '\0')
12694 error (_("Target does not support this command."));
12695 if (strcmp (target_buf, "OK") != 0)
12696 error (_("Bogus reply from target: %s"), target_buf);
12700 remote_trace_find (struct target_ops *self,
12701 enum trace_find_type type, int num,
12702 CORE_ADDR addr1, CORE_ADDR addr2,
12705 struct remote_state *rs = get_remote_state ();
12706 char *endbuf = rs->buf + get_remote_packet_size ();
12708 int target_frameno = -1, target_tracept = -1;
12710 /* Lookups other than by absolute frame number depend on the current
12711 trace selected, so make sure it is correct on the remote end
12713 if (type != tfind_number)
12714 set_remote_traceframe ();
12717 strcpy (p, "QTFrame:");
12718 p = strchr (p, '\0');
12722 xsnprintf (p, endbuf - p, "%x", num);
12725 xsnprintf (p, endbuf - p, "pc:%s", phex_nz (addr1, 0));
12728 xsnprintf (p, endbuf - p, "tdp:%x", num);
12731 xsnprintf (p, endbuf - p, "range:%s:%s", phex_nz (addr1, 0),
12732 phex_nz (addr2, 0));
12734 case tfind_outside:
12735 xsnprintf (p, endbuf - p, "outside:%s:%s", phex_nz (addr1, 0),
12736 phex_nz (addr2, 0));
12739 error (_("Unknown trace find type %d"), type);
12743 reply = remote_get_noisy_reply (&(rs->buf), &rs->buf_size);
12744 if (*reply == '\0')
12745 error (_("Target does not support this command."));
12747 while (reply && *reply)
12752 target_frameno = (int) strtol (p, &reply, 16);
12754 error (_("Unable to parse trace frame number"));
12755 /* Don't update our remote traceframe number cache on failure
12756 to select a remote traceframe. */
12757 if (target_frameno == -1)
12762 target_tracept = (int) strtol (p, &reply, 16);
12764 error (_("Unable to parse tracepoint number"));
12766 case 'O': /* "OK"? */
12767 if (reply[1] == 'K' && reply[2] == '\0')
12770 error (_("Bogus reply from target: %s"), reply);
12773 error (_("Bogus reply from target: %s"), reply);
12776 *tpp = target_tracept;
12778 rs->remote_traceframe_number = target_frameno;
12779 return target_frameno;
12783 remote_get_trace_state_variable_value (struct target_ops *self,
12784 int tsvnum, LONGEST *val)
12786 struct remote_state *rs = get_remote_state ();
12790 set_remote_traceframe ();
12792 xsnprintf (rs->buf, get_remote_packet_size (), "qTV:%x", tsvnum);
12794 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12795 if (reply && *reply)
12799 unpack_varlen_hex (reply + 1, &uval);
12800 *val = (LONGEST) uval;
12808 remote_save_trace_data (struct target_ops *self, const char *filename)
12810 struct remote_state *rs = get_remote_state ();
12814 strcpy (p, "QTSave:");
12816 if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ())
12817 error (_("Remote file name too long for trace save packet"));
12818 p += 2 * bin2hex ((gdb_byte *) filename, p, strlen (filename));
12821 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12822 if (*reply == '\0')
12823 error (_("Target does not support this command."));
12824 if (strcmp (reply, "OK") != 0)
12825 error (_("Bogus reply from target: %s"), reply);
12829 /* This is basically a memory transfer, but needs to be its own packet
12830 because we don't know how the target actually organizes its trace
12831 memory, plus we want to be able to ask for as much as possible, but
12832 not be unhappy if we don't get as much as we ask for. */
12835 remote_get_raw_trace_data (struct target_ops *self,
12836 gdb_byte *buf, ULONGEST offset, LONGEST len)
12838 struct remote_state *rs = get_remote_state ();
12844 strcpy (p, "qTBuffer:");
12846 p += hexnumstr (p, offset);
12848 p += hexnumstr (p, len);
12852 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12853 if (reply && *reply)
12855 /* 'l' by itself means we're at the end of the buffer and
12856 there is nothing more to get. */
12860 /* Convert the reply into binary. Limit the number of bytes to
12861 convert according to our passed-in buffer size, rather than
12862 what was returned in the packet; if the target is
12863 unexpectedly generous and gives us a bigger reply than we
12864 asked for, we don't want to crash. */
12865 rslt = hex2bin (target_buf, buf, len);
12869 /* Something went wrong, flag as an error. */
12874 remote_set_disconnected_tracing (struct target_ops *self, int val)
12876 struct remote_state *rs = get_remote_state ();
12878 if (packet_support (PACKET_DisconnectedTracing_feature) == PACKET_ENABLE)
12882 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisconnected:%x", val);
12884 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12885 if (*reply == '\0')
12886 error (_("Target does not support this command."));
12887 if (strcmp (reply, "OK") != 0)
12888 error (_("Bogus reply from target: %s"), reply);
12891 warning (_("Target does not support disconnected tracing."));
12895 remote_core_of_thread (struct target_ops *ops, ptid_t ptid)
12897 struct thread_info *info = find_thread_ptid (ptid);
12899 if (info && info->priv)
12900 return info->priv->core;
12905 remote_set_circular_trace_buffer (struct target_ops *self, int val)
12907 struct remote_state *rs = get_remote_state ();
12910 xsnprintf (rs->buf, get_remote_packet_size (), "QTBuffer:circular:%x", val);
12912 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12913 if (*reply == '\0')
12914 error (_("Target does not support this command."));
12915 if (strcmp (reply, "OK") != 0)
12916 error (_("Bogus reply from target: %s"), reply);
12919 static struct traceframe_info *
12920 remote_traceframe_info (struct target_ops *self)
12924 text = target_read_stralloc (¤t_target,
12925 TARGET_OBJECT_TRACEFRAME_INFO, NULL);
12928 struct traceframe_info *info;
12929 struct cleanup *back_to = make_cleanup (xfree, text);
12931 info = parse_traceframe_info (text);
12932 do_cleanups (back_to);
12939 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12940 instruction on which a fast tracepoint may be placed. Returns -1
12941 if the packet is not supported, and 0 if the minimum instruction
12942 length is unknown. */
12945 remote_get_min_fast_tracepoint_insn_len (struct target_ops *self)
12947 struct remote_state *rs = get_remote_state ();
12950 /* If we're not debugging a process yet, the IPA can't be
12952 if (!target_has_execution)
12955 /* Make sure the remote is pointing at the right process. */
12956 set_general_process ();
12958 xsnprintf (rs->buf, get_remote_packet_size (), "qTMinFTPILen");
12960 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12961 if (*reply == '\0')
12965 ULONGEST min_insn_len;
12967 unpack_varlen_hex (reply, &min_insn_len);
12969 return (int) min_insn_len;
12974 remote_set_trace_buffer_size (struct target_ops *self, LONGEST val)
12976 if (packet_support (PACKET_QTBuffer_size) != PACKET_DISABLE)
12978 struct remote_state *rs = get_remote_state ();
12979 char *buf = rs->buf;
12980 char *endbuf = rs->buf + get_remote_packet_size ();
12981 enum packet_result result;
12983 gdb_assert (val >= 0 || val == -1);
12984 buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:");
12985 /* Send -1 as literal "-1" to avoid host size dependency. */
12989 buf += hexnumstr (buf, (ULONGEST) -val);
12992 buf += hexnumstr (buf, (ULONGEST) val);
12995 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
12996 result = packet_ok (rs->buf,
12997 &remote_protocol_packets[PACKET_QTBuffer_size]);
12999 if (result != PACKET_OK)
13000 warning (_("Bogus reply from target: %s"), rs->buf);
13005 remote_set_trace_notes (struct target_ops *self,
13006 const char *user, const char *notes,
13007 const char *stop_notes)
13009 struct remote_state *rs = get_remote_state ();
13011 char *buf = rs->buf;
13012 char *endbuf = rs->buf + get_remote_packet_size ();
13015 buf += xsnprintf (buf, endbuf - buf, "QTNotes:");
13018 buf += xsnprintf (buf, endbuf - buf, "user:");
13019 nbytes = bin2hex ((gdb_byte *) user, buf, strlen (user));
13025 buf += xsnprintf (buf, endbuf - buf, "notes:");
13026 nbytes = bin2hex ((gdb_byte *) notes, buf, strlen (notes));
13032 buf += xsnprintf (buf, endbuf - buf, "tstop:");
13033 nbytes = bin2hex ((gdb_byte *) stop_notes, buf, strlen (stop_notes));
13037 /* Ensure the buffer is terminated. */
13041 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
13042 if (*reply == '\0')
13045 if (strcmp (reply, "OK") != 0)
13046 error (_("Bogus reply from target: %s"), reply);
13052 remote_use_agent (struct target_ops *self, int use)
13054 if (packet_support (PACKET_QAgent) != PACKET_DISABLE)
13056 struct remote_state *rs = get_remote_state ();
13058 /* If the stub supports QAgent. */
13059 xsnprintf (rs->buf, get_remote_packet_size (), "QAgent:%d", use);
13061 getpkt (&rs->buf, &rs->buf_size, 0);
13063 if (strcmp (rs->buf, "OK") == 0)
13074 remote_can_use_agent (struct target_ops *self)
13076 return (packet_support (PACKET_QAgent) != PACKET_DISABLE);
13079 struct btrace_target_info
13081 /* The ptid of the traced thread. */
13084 /* The obtained branch trace configuration. */
13085 struct btrace_config conf;
13088 /* Reset our idea of our target's btrace configuration. */
13091 remote_btrace_reset (void)
13093 struct remote_state *rs = get_remote_state ();
13095 memset (&rs->btrace_config, 0, sizeof (rs->btrace_config));
13098 /* Check whether the target supports branch tracing. */
13101 remote_supports_btrace (struct target_ops *self, enum btrace_format format)
13103 if (packet_support (PACKET_Qbtrace_off) != PACKET_ENABLE)
13105 if (packet_support (PACKET_qXfer_btrace) != PACKET_ENABLE)
13110 case BTRACE_FORMAT_NONE:
13113 case BTRACE_FORMAT_BTS:
13114 return (packet_support (PACKET_Qbtrace_bts) == PACKET_ENABLE);
13116 case BTRACE_FORMAT_PT:
13117 /* The trace is decoded on the host. Even if our target supports it,
13118 we still need to have libipt to decode the trace. */
13119 #if defined (HAVE_LIBIPT)
13120 return (packet_support (PACKET_Qbtrace_pt) == PACKET_ENABLE);
13121 #else /* !defined (HAVE_LIBIPT) */
13123 #endif /* !defined (HAVE_LIBIPT) */
13126 internal_error (__FILE__, __LINE__, _("Unknown branch trace format"));
13129 /* Synchronize the configuration with the target. */
13132 btrace_sync_conf (const struct btrace_config *conf)
13134 struct packet_config *packet;
13135 struct remote_state *rs;
13136 char *buf, *pos, *endbuf;
13138 rs = get_remote_state ();
13140 endbuf = buf + get_remote_packet_size ();
13142 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_bts_size];
13143 if (packet_config_support (packet) == PACKET_ENABLE
13144 && conf->bts.size != rs->btrace_config.bts.size)
13147 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
13151 getpkt (&buf, &rs->buf_size, 0);
13153 if (packet_ok (buf, packet) == PACKET_ERROR)
13155 if (buf[0] == 'E' && buf[1] == '.')
13156 error (_("Failed to configure the BTS buffer size: %s"), buf + 2);
13158 error (_("Failed to configure the BTS buffer size."));
13161 rs->btrace_config.bts.size = conf->bts.size;
13164 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_pt_size];
13165 if (packet_config_support (packet) == PACKET_ENABLE
13166 && conf->pt.size != rs->btrace_config.pt.size)
13169 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
13173 getpkt (&buf, &rs->buf_size, 0);
13175 if (packet_ok (buf, packet) == PACKET_ERROR)
13177 if (buf[0] == 'E' && buf[1] == '.')
13178 error (_("Failed to configure the trace buffer size: %s"), buf + 2);
13180 error (_("Failed to configure the trace buffer size."));
13183 rs->btrace_config.pt.size = conf->pt.size;
13187 /* Read the current thread's btrace configuration from the target and
13188 store it into CONF. */
13191 btrace_read_config (struct btrace_config *conf)
13195 xml = target_read_stralloc (¤t_target,
13196 TARGET_OBJECT_BTRACE_CONF, "");
13199 struct cleanup *cleanup;
13201 cleanup = make_cleanup (xfree, xml);
13202 parse_xml_btrace_conf (conf, xml);
13203 do_cleanups (cleanup);
13207 /* Maybe reopen target btrace. */
13210 remote_btrace_maybe_reopen (void)
13212 struct remote_state *rs = get_remote_state ();
13213 struct thread_info *tp;
13214 int btrace_target_pushed = 0;
13217 scoped_restore_current_thread restore_thread;
13219 ALL_NON_EXITED_THREADS (tp)
13221 set_general_thread (tp->ptid);
13223 memset (&rs->btrace_config, 0x00, sizeof (struct btrace_config));
13224 btrace_read_config (&rs->btrace_config);
13226 if (rs->btrace_config.format == BTRACE_FORMAT_NONE)
13229 #if !defined (HAVE_LIBIPT)
13230 if (rs->btrace_config.format == BTRACE_FORMAT_PT)
13235 warning (_("GDB does not support Intel Processor Trace. "
13236 "\"record\" will not work in this session."));
13241 #endif /* !defined (HAVE_LIBIPT) */
13243 /* Push target, once, but before anything else happens. This way our
13244 changes to the threads will be cleaned up by unpushing the target
13245 in case btrace_read_config () throws. */
13246 if (!btrace_target_pushed)
13248 btrace_target_pushed = 1;
13249 record_btrace_push_target ();
13250 printf_filtered (_("Target is recording using %s.\n"),
13251 btrace_format_string (rs->btrace_config.format));
13254 tp->btrace.target = XCNEW (struct btrace_target_info);
13255 tp->btrace.target->ptid = tp->ptid;
13256 tp->btrace.target->conf = rs->btrace_config;
13260 /* Enable branch tracing. */
13262 static struct btrace_target_info *
13263 remote_enable_btrace (struct target_ops *self, ptid_t ptid,
13264 const struct btrace_config *conf)
13266 struct btrace_target_info *tinfo = NULL;
13267 struct packet_config *packet = NULL;
13268 struct remote_state *rs = get_remote_state ();
13269 char *buf = rs->buf;
13270 char *endbuf = rs->buf + get_remote_packet_size ();
13272 switch (conf->format)
13274 case BTRACE_FORMAT_BTS:
13275 packet = &remote_protocol_packets[PACKET_Qbtrace_bts];
13278 case BTRACE_FORMAT_PT:
13279 packet = &remote_protocol_packets[PACKET_Qbtrace_pt];
13283 if (packet == NULL || packet_config_support (packet) != PACKET_ENABLE)
13284 error (_("Target does not support branch tracing."));
13286 btrace_sync_conf (conf);
13288 set_general_thread (ptid);
13290 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
13292 getpkt (&rs->buf, &rs->buf_size, 0);
13294 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
13296 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
13297 error (_("Could not enable branch tracing for %s: %s"),
13298 target_pid_to_str (ptid), rs->buf + 2);
13300 error (_("Could not enable branch tracing for %s."),
13301 target_pid_to_str (ptid));
13304 tinfo = XCNEW (struct btrace_target_info);
13305 tinfo->ptid = ptid;
13307 /* If we fail to read the configuration, we lose some information, but the
13308 tracing itself is not impacted. */
13311 btrace_read_config (&tinfo->conf);
13313 CATCH (err, RETURN_MASK_ERROR)
13315 if (err.message != NULL)
13316 warning ("%s", err.message);
13323 /* Disable branch tracing. */
13326 remote_disable_btrace (struct target_ops *self,
13327 struct btrace_target_info *tinfo)
13329 struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_off];
13330 struct remote_state *rs = get_remote_state ();
13331 char *buf = rs->buf;
13332 char *endbuf = rs->buf + get_remote_packet_size ();
13334 if (packet_config_support (packet) != PACKET_ENABLE)
13335 error (_("Target does not support branch tracing."));
13337 set_general_thread (tinfo->ptid);
13339 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
13341 getpkt (&rs->buf, &rs->buf_size, 0);
13343 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
13345 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
13346 error (_("Could not disable branch tracing for %s: %s"),
13347 target_pid_to_str (tinfo->ptid), rs->buf + 2);
13349 error (_("Could not disable branch tracing for %s."),
13350 target_pid_to_str (tinfo->ptid));
13356 /* Teardown branch tracing. */
13359 remote_teardown_btrace (struct target_ops *self,
13360 struct btrace_target_info *tinfo)
13362 /* We must not talk to the target during teardown. */
13366 /* Read the branch trace. */
13368 static enum btrace_error
13369 remote_read_btrace (struct target_ops *self,
13370 struct btrace_data *btrace,
13371 struct btrace_target_info *tinfo,
13372 enum btrace_read_type type)
13374 struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace];
13375 struct cleanup *cleanup;
13379 if (packet_config_support (packet) != PACKET_ENABLE)
13380 error (_("Target does not support branch tracing."));
13382 #if !defined(HAVE_LIBEXPAT)
13383 error (_("Cannot process branch tracing result. XML parsing not supported."));
13388 case BTRACE_READ_ALL:
13391 case BTRACE_READ_NEW:
13394 case BTRACE_READ_DELTA:
13398 internal_error (__FILE__, __LINE__,
13399 _("Bad branch tracing read type: %u."),
13400 (unsigned int) type);
13403 xml = target_read_stralloc (¤t_target,
13404 TARGET_OBJECT_BTRACE, annex);
13406 return BTRACE_ERR_UNKNOWN;
13408 cleanup = make_cleanup (xfree, xml);
13409 parse_xml_btrace (btrace, xml);
13410 do_cleanups (cleanup);
13412 return BTRACE_ERR_NONE;
13415 static const struct btrace_config *
13416 remote_btrace_conf (struct target_ops *self,
13417 const struct btrace_target_info *tinfo)
13419 return &tinfo->conf;
13423 remote_augmented_libraries_svr4_read (struct target_ops *self)
13425 return (packet_support (PACKET_augmented_libraries_svr4_read_feature)
13429 /* Implementation of to_load. */
13432 remote_load (struct target_ops *self, const char *name, int from_tty)
13434 generic_load (name, from_tty);
13437 /* Accepts an integer PID; returns a string representing a file that
13438 can be opened on the remote side to get the symbols for the child
13439 process. Returns NULL if the operation is not supported. */
13442 remote_pid_to_exec_file (struct target_ops *self, int pid)
13444 static char *filename = NULL;
13445 struct inferior *inf;
13446 char *annex = NULL;
13448 if (packet_support (PACKET_qXfer_exec_file) != PACKET_ENABLE)
13451 if (filename != NULL)
13454 inf = find_inferior_pid (pid);
13456 internal_error (__FILE__, __LINE__,
13457 _("not currently attached to process %d"), pid);
13459 if (!inf->fake_pid_p)
13461 const int annex_size = 9;
13463 annex = (char *) alloca (annex_size);
13464 xsnprintf (annex, annex_size, "%x", pid);
13467 filename = target_read_stralloc (¤t_target,
13468 TARGET_OBJECT_EXEC_FILE, annex);
13473 /* Implement the to_can_do_single_step target_ops method. */
13476 remote_can_do_single_step (struct target_ops *ops)
13478 /* We can only tell whether target supports single step or not by
13479 supported s and S vCont actions if the stub supports vContSupported
13480 feature. If the stub doesn't support vContSupported feature,
13481 we have conservatively to think target doesn't supports single
13483 if (packet_support (PACKET_vContSupported) == PACKET_ENABLE)
13485 struct remote_state *rs = get_remote_state ();
13487 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
13488 remote_vcont_probe (rs);
13490 return rs->supports_vCont.s && rs->supports_vCont.S;
13496 /* Implementation of the to_execution_direction method for the remote
13499 static enum exec_direction_kind
13500 remote_execution_direction (struct target_ops *self)
13502 struct remote_state *rs = get_remote_state ();
13504 return rs->last_resume_exec_dir;
13508 init_remote_ops (void)
13510 remote_ops.to_shortname = "remote";
13511 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
13512 remote_ops.to_doc =
13513 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13514 Specify the serial device it is connected to\n\
13515 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13516 remote_ops.to_open = remote_open;
13517 remote_ops.to_close = remote_close;
13518 remote_ops.to_detach = remote_detach;
13519 remote_ops.to_disconnect = remote_disconnect;
13520 remote_ops.to_resume = remote_resume;
13521 remote_ops.to_commit_resume = remote_commit_resume;
13522 remote_ops.to_wait = remote_wait;
13523 remote_ops.to_fetch_registers = remote_fetch_registers;
13524 remote_ops.to_store_registers = remote_store_registers;
13525 remote_ops.to_prepare_to_store = remote_prepare_to_store;
13526 remote_ops.to_files_info = remote_files_info;
13527 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
13528 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
13529 remote_ops.to_stopped_by_sw_breakpoint = remote_stopped_by_sw_breakpoint;
13530 remote_ops.to_supports_stopped_by_sw_breakpoint = remote_supports_stopped_by_sw_breakpoint;
13531 remote_ops.to_stopped_by_hw_breakpoint = remote_stopped_by_hw_breakpoint;
13532 remote_ops.to_supports_stopped_by_hw_breakpoint = remote_supports_stopped_by_hw_breakpoint;
13533 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
13534 remote_ops.to_stopped_data_address = remote_stopped_data_address;
13535 remote_ops.to_watchpoint_addr_within_range =
13536 remote_watchpoint_addr_within_range;
13537 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
13538 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
13539 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
13540 remote_ops.to_region_ok_for_hw_watchpoint
13541 = remote_region_ok_for_hw_watchpoint;
13542 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
13543 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
13544 remote_ops.to_kill = remote_kill;
13545 remote_ops.to_load = remote_load;
13546 remote_ops.to_mourn_inferior = remote_mourn;
13547 remote_ops.to_pass_signals = remote_pass_signals;
13548 remote_ops.to_set_syscall_catchpoint = remote_set_syscall_catchpoint;
13549 remote_ops.to_program_signals = remote_program_signals;
13550 remote_ops.to_thread_alive = remote_thread_alive;
13551 remote_ops.to_thread_name = remote_thread_name;
13552 remote_ops.to_update_thread_list = remote_update_thread_list;
13553 remote_ops.to_pid_to_str = remote_pid_to_str;
13554 remote_ops.to_extra_thread_info = remote_threads_extra_info;
13555 remote_ops.to_get_ada_task_ptid = remote_get_ada_task_ptid;
13556 remote_ops.to_stop = remote_stop;
13557 remote_ops.to_interrupt = remote_interrupt;
13558 remote_ops.to_pass_ctrlc = remote_pass_ctrlc;
13559 remote_ops.to_xfer_partial = remote_xfer_partial;
13560 remote_ops.to_get_memory_xfer_limit = remote_get_memory_xfer_limit;
13561 remote_ops.to_rcmd = remote_rcmd;
13562 remote_ops.to_pid_to_exec_file = remote_pid_to_exec_file;
13563 remote_ops.to_log_command = serial_log_command;
13564 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
13565 remote_ops.to_stratum = process_stratum;
13566 remote_ops.to_has_all_memory = default_child_has_all_memory;
13567 remote_ops.to_has_memory = default_child_has_memory;
13568 remote_ops.to_has_stack = default_child_has_stack;
13569 remote_ops.to_has_registers = default_child_has_registers;
13570 remote_ops.to_has_execution = default_child_has_execution;
13571 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
13572 remote_ops.to_can_execute_reverse = remote_can_execute_reverse;
13573 remote_ops.to_magic = OPS_MAGIC;
13574 remote_ops.to_memory_map = remote_memory_map;
13575 remote_ops.to_flash_erase = remote_flash_erase;
13576 remote_ops.to_flash_done = remote_flash_done;
13577 remote_ops.to_read_description = remote_read_description;
13578 remote_ops.to_search_memory = remote_search_memory;
13579 remote_ops.to_can_async_p = remote_can_async_p;
13580 remote_ops.to_is_async_p = remote_is_async_p;
13581 remote_ops.to_async = remote_async;
13582 remote_ops.to_thread_events = remote_thread_events;
13583 remote_ops.to_can_do_single_step = remote_can_do_single_step;
13584 remote_ops.to_terminal_inferior = remote_terminal_inferior;
13585 remote_ops.to_terminal_ours = remote_terminal_ours;
13586 remote_ops.to_supports_non_stop = remote_supports_non_stop;
13587 remote_ops.to_supports_multi_process = remote_supports_multi_process;
13588 remote_ops.to_supports_disable_randomization
13589 = remote_supports_disable_randomization;
13590 remote_ops.to_filesystem_is_local = remote_filesystem_is_local;
13591 remote_ops.to_fileio_open = remote_hostio_open;
13592 remote_ops.to_fileio_pwrite = remote_hostio_pwrite;
13593 remote_ops.to_fileio_pread = remote_hostio_pread;
13594 remote_ops.to_fileio_fstat = remote_hostio_fstat;
13595 remote_ops.to_fileio_close = remote_hostio_close;
13596 remote_ops.to_fileio_unlink = remote_hostio_unlink;
13597 remote_ops.to_fileio_readlink = remote_hostio_readlink;
13598 remote_ops.to_supports_enable_disable_tracepoint = remote_supports_enable_disable_tracepoint;
13599 remote_ops.to_supports_string_tracing = remote_supports_string_tracing;
13600 remote_ops.to_supports_evaluation_of_breakpoint_conditions = remote_supports_cond_breakpoints;
13601 remote_ops.to_can_run_breakpoint_commands = remote_can_run_breakpoint_commands;
13602 remote_ops.to_trace_init = remote_trace_init;
13603 remote_ops.to_download_tracepoint = remote_download_tracepoint;
13604 remote_ops.to_can_download_tracepoint = remote_can_download_tracepoint;
13605 remote_ops.to_download_trace_state_variable
13606 = remote_download_trace_state_variable;
13607 remote_ops.to_enable_tracepoint = remote_enable_tracepoint;
13608 remote_ops.to_disable_tracepoint = remote_disable_tracepoint;
13609 remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions;
13610 remote_ops.to_trace_start = remote_trace_start;
13611 remote_ops.to_get_trace_status = remote_get_trace_status;
13612 remote_ops.to_get_tracepoint_status = remote_get_tracepoint_status;
13613 remote_ops.to_trace_stop = remote_trace_stop;
13614 remote_ops.to_trace_find = remote_trace_find;
13615 remote_ops.to_get_trace_state_variable_value
13616 = remote_get_trace_state_variable_value;
13617 remote_ops.to_save_trace_data = remote_save_trace_data;
13618 remote_ops.to_upload_tracepoints = remote_upload_tracepoints;
13619 remote_ops.to_upload_trace_state_variables
13620 = remote_upload_trace_state_variables;
13621 remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data;
13622 remote_ops.to_get_min_fast_tracepoint_insn_len = remote_get_min_fast_tracepoint_insn_len;
13623 remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing;
13624 remote_ops.to_set_circular_trace_buffer = remote_set_circular_trace_buffer;
13625 remote_ops.to_set_trace_buffer_size = remote_set_trace_buffer_size;
13626 remote_ops.to_set_trace_notes = remote_set_trace_notes;
13627 remote_ops.to_core_of_thread = remote_core_of_thread;
13628 remote_ops.to_verify_memory = remote_verify_memory;
13629 remote_ops.to_get_tib_address = remote_get_tib_address;
13630 remote_ops.to_set_permissions = remote_set_permissions;
13631 remote_ops.to_static_tracepoint_marker_at
13632 = remote_static_tracepoint_marker_at;
13633 remote_ops.to_static_tracepoint_markers_by_strid
13634 = remote_static_tracepoint_markers_by_strid;
13635 remote_ops.to_traceframe_info = remote_traceframe_info;
13636 remote_ops.to_use_agent = remote_use_agent;
13637 remote_ops.to_can_use_agent = remote_can_use_agent;
13638 remote_ops.to_supports_btrace = remote_supports_btrace;
13639 remote_ops.to_enable_btrace = remote_enable_btrace;
13640 remote_ops.to_disable_btrace = remote_disable_btrace;
13641 remote_ops.to_teardown_btrace = remote_teardown_btrace;
13642 remote_ops.to_read_btrace = remote_read_btrace;
13643 remote_ops.to_btrace_conf = remote_btrace_conf;
13644 remote_ops.to_augmented_libraries_svr4_read =
13645 remote_augmented_libraries_svr4_read;
13646 remote_ops.to_follow_fork = remote_follow_fork;
13647 remote_ops.to_follow_exec = remote_follow_exec;
13648 remote_ops.to_insert_fork_catchpoint = remote_insert_fork_catchpoint;
13649 remote_ops.to_remove_fork_catchpoint = remote_remove_fork_catchpoint;
13650 remote_ops.to_insert_vfork_catchpoint = remote_insert_vfork_catchpoint;
13651 remote_ops.to_remove_vfork_catchpoint = remote_remove_vfork_catchpoint;
13652 remote_ops.to_insert_exec_catchpoint = remote_insert_exec_catchpoint;
13653 remote_ops.to_remove_exec_catchpoint = remote_remove_exec_catchpoint;
13654 remote_ops.to_execution_direction = remote_execution_direction;
13657 /* Set up the extended remote vector by making a copy of the standard
13658 remote vector and adding to it. */
13661 init_extended_remote_ops (void)
13663 extended_remote_ops = remote_ops;
13665 extended_remote_ops.to_shortname = "extended-remote";
13666 extended_remote_ops.to_longname =
13667 "Extended remote serial target in gdb-specific protocol";
13668 extended_remote_ops.to_doc =
13669 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13670 Specify the serial device it is connected to (e.g. /dev/ttya).";
13671 extended_remote_ops.to_open = extended_remote_open;
13672 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
13673 extended_remote_ops.to_detach = extended_remote_detach;
13674 extended_remote_ops.to_attach = extended_remote_attach;
13675 extended_remote_ops.to_post_attach = extended_remote_post_attach;
13676 extended_remote_ops.to_supports_disable_randomization
13677 = extended_remote_supports_disable_randomization;
13681 remote_can_async_p (struct target_ops *ops)
13683 struct remote_state *rs = get_remote_state ();
13685 /* We don't go async if the user has explicitly prevented it with the
13686 "maint set target-async" command. */
13687 if (!target_async_permitted)
13690 /* We're async whenever the serial device is. */
13691 return serial_can_async_p (rs->remote_desc);
13695 remote_is_async_p (struct target_ops *ops)
13697 struct remote_state *rs = get_remote_state ();
13699 if (!target_async_permitted)
13700 /* We only enable async when the user specifically asks for it. */
13703 /* We're async whenever the serial device is. */
13704 return serial_is_async_p (rs->remote_desc);
13707 /* Pass the SERIAL event on and up to the client. One day this code
13708 will be able to delay notifying the client of an event until the
13709 point where an entire packet has been received. */
13711 static serial_event_ftype remote_async_serial_handler;
13714 remote_async_serial_handler (struct serial *scb, void *context)
13716 /* Don't propogate error information up to the client. Instead let
13717 the client find out about the error by querying the target. */
13718 inferior_event_handler (INF_REG_EVENT, NULL);
13722 remote_async_inferior_event_handler (gdb_client_data data)
13724 inferior_event_handler (INF_REG_EVENT, NULL);
13728 remote_async (struct target_ops *ops, int enable)
13730 struct remote_state *rs = get_remote_state ();
13734 serial_async (rs->remote_desc, remote_async_serial_handler, rs);
13736 /* If there are pending events in the stop reply queue tell the
13737 event loop to process them. */
13738 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
13739 mark_async_event_handler (remote_async_inferior_event_token);
13740 /* For simplicity, below we clear the pending events token
13741 without remembering whether it is marked, so here we always
13742 mark it. If there's actually no pending notification to
13743 process, this ends up being a no-op (other than a spurious
13744 event-loop wakeup). */
13745 if (target_is_non_stop_p ())
13746 mark_async_event_handler (rs->notif_state->get_pending_events_token);
13750 serial_async (rs->remote_desc, NULL, NULL);
13751 /* If the core is disabling async, it doesn't want to be
13752 disturbed with target events. Clear all async event sources
13754 clear_async_event_handler (remote_async_inferior_event_token);
13755 if (target_is_non_stop_p ())
13756 clear_async_event_handler (rs->notif_state->get_pending_events_token);
13760 /* Implementation of the to_thread_events method. */
13763 remote_thread_events (struct target_ops *ops, int enable)
13765 struct remote_state *rs = get_remote_state ();
13766 size_t size = get_remote_packet_size ();
13768 if (packet_support (PACKET_QThreadEvents) == PACKET_DISABLE)
13771 xsnprintf (rs->buf, size, "QThreadEvents:%x", enable ? 1 : 0);
13773 getpkt (&rs->buf, &rs->buf_size, 0);
13775 switch (packet_ok (rs->buf,
13776 &remote_protocol_packets[PACKET_QThreadEvents]))
13779 if (strcmp (rs->buf, "OK") != 0)
13780 error (_("Remote refused setting thread events: %s"), rs->buf);
13783 warning (_("Remote failure reply: %s"), rs->buf);
13785 case PACKET_UNKNOWN:
13791 set_remote_cmd (char *args, int from_tty)
13793 help_list (remote_set_cmdlist, "set remote ", all_commands, gdb_stdout);
13797 show_remote_cmd (char *args, int from_tty)
13799 /* We can't just use cmd_show_list here, because we want to skip
13800 the redundant "show remote Z-packet" and the legacy aliases. */
13801 struct cmd_list_element *list = remote_show_cmdlist;
13802 struct ui_out *uiout = current_uiout;
13804 ui_out_emit_tuple tuple_emitter (uiout, "showlist");
13805 for (; list != NULL; list = list->next)
13806 if (strcmp (list->name, "Z-packet") == 0)
13808 else if (list->type == not_set_cmd)
13809 /* Alias commands are exactly like the original, except they
13810 don't have the normal type. */
13814 ui_out_emit_tuple option_emitter (uiout, "option");
13816 uiout->field_string ("name", list->name);
13817 uiout->text (": ");
13818 if (list->type == show_cmd)
13819 do_show_command (NULL, from_tty, list);
13821 cmd_func (list, NULL, from_tty);
13826 /* Function to be called whenever a new objfile (shlib) is detected. */
13828 remote_new_objfile (struct objfile *objfile)
13830 struct remote_state *rs = get_remote_state ();
13832 if (rs->remote_desc != 0) /* Have a remote connection. */
13833 remote_check_symbols ();
13836 /* Pull all the tracepoints defined on the target and create local
13837 data structures representing them. We don't want to create real
13838 tracepoints yet, we don't want to mess up the user's existing
13842 remote_upload_tracepoints (struct target_ops *self, struct uploaded_tp **utpp)
13844 struct remote_state *rs = get_remote_state ();
13847 /* Ask for a first packet of tracepoint definition. */
13849 getpkt (&rs->buf, &rs->buf_size, 0);
13851 while (*p && *p != 'l')
13853 parse_tracepoint_definition (p, utpp);
13854 /* Ask for another packet of tracepoint definition. */
13856 getpkt (&rs->buf, &rs->buf_size, 0);
13863 remote_upload_trace_state_variables (struct target_ops *self,
13864 struct uploaded_tsv **utsvp)
13866 struct remote_state *rs = get_remote_state ();
13869 /* Ask for a first packet of variable definition. */
13871 getpkt (&rs->buf, &rs->buf_size, 0);
13873 while (*p && *p != 'l')
13875 parse_tsv_definition (p, utsvp);
13876 /* Ask for another packet of variable definition. */
13878 getpkt (&rs->buf, &rs->buf_size, 0);
13884 /* The "set/show range-stepping" show hook. */
13887 show_range_stepping (struct ui_file *file, int from_tty,
13888 struct cmd_list_element *c,
13891 fprintf_filtered (file,
13892 _("Debugger's willingness to use range stepping "
13893 "is %s.\n"), value);
13896 /* The "set/show range-stepping" set hook. */
13899 set_range_stepping (char *ignore_args, int from_tty,
13900 struct cmd_list_element *c)
13902 struct remote_state *rs = get_remote_state ();
13904 /* Whene enabling, check whether range stepping is actually
13905 supported by the target, and warn if not. */
13906 if (use_range_stepping)
13908 if (rs->remote_desc != NULL)
13910 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
13911 remote_vcont_probe (rs);
13913 if (packet_support (PACKET_vCont) == PACKET_ENABLE
13914 && rs->supports_vCont.r)
13918 warning (_("Range stepping is not supported by the current target"));
13923 _initialize_remote (void)
13925 struct cmd_list_element *cmd;
13926 const char *cmd_name;
13928 /* architecture specific data */
13929 remote_gdbarch_data_handle =
13930 gdbarch_data_register_post_init (init_remote_state);
13931 remote_g_packet_data_handle =
13932 gdbarch_data_register_pre_init (remote_g_packet_data_init);
13935 = register_program_space_data_with_cleanup (NULL,
13936 remote_pspace_data_cleanup);
13938 /* Initialize the per-target state. At the moment there is only one
13939 of these, not one per target. Only one target is active at a
13941 remote_state = new_remote_state ();
13943 init_remote_ops ();
13944 add_target (&remote_ops);
13946 init_extended_remote_ops ();
13947 add_target (&extended_remote_ops);
13949 /* Hook into new objfile notification. */
13950 observer_attach_new_objfile (remote_new_objfile);
13951 /* We're no longer interested in notification events of an inferior
13953 observer_attach_inferior_exit (discard_pending_stop_replies);
13956 init_remote_threadtests ();
13959 stop_reply_queue = QUEUE_alloc (stop_reply_p, stop_reply_xfree);
13960 /* set/show remote ... */
13962 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
13963 Remote protocol specific variables\n\
13964 Configure various remote-protocol specific variables such as\n\
13965 the packets being used"),
13966 &remote_set_cmdlist, "set remote ",
13967 0 /* allow-unknown */, &setlist);
13968 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
13969 Remote protocol specific variables\n\
13970 Configure various remote-protocol specific variables such as\n\
13971 the packets being used"),
13972 &remote_show_cmdlist, "show remote ",
13973 0 /* allow-unknown */, &showlist);
13975 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
13976 Compare section data on target to the exec file.\n\
13977 Argument is a single section name (default: all loaded sections).\n\
13978 To compare only read-only loaded sections, specify the -r option."),
13981 add_cmd ("packet", class_maintenance, packet_command, _("\
13982 Send an arbitrary packet to a remote target.\n\
13983 maintenance packet TEXT\n\
13984 If GDB is talking to an inferior via the GDB serial protocol, then\n\
13985 this command sends the string TEXT to the inferior, and displays the\n\
13986 response packet. GDB supplies the initial `$' character, and the\n\
13987 terminating `#' character and checksum."),
13990 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
13991 Set whether to send break if interrupted."), _("\
13992 Show whether to send break if interrupted."), _("\
13993 If set, a break, instead of a cntrl-c, is sent to the remote target."),
13994 set_remotebreak, show_remotebreak,
13995 &setlist, &showlist);
13996 cmd_name = "remotebreak";
13997 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
13998 deprecate_cmd (cmd, "set remote interrupt-sequence");
13999 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
14000 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
14001 deprecate_cmd (cmd, "show remote interrupt-sequence");
14003 add_setshow_enum_cmd ("interrupt-sequence", class_support,
14004 interrupt_sequence_modes, &interrupt_sequence_mode,
14006 Set interrupt sequence to remote target."), _("\
14007 Show interrupt sequence to remote target."), _("\
14008 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14009 NULL, show_interrupt_sequence,
14010 &remote_set_cmdlist,
14011 &remote_show_cmdlist);
14013 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
14014 &interrupt_on_connect, _("\
14015 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14016 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14017 If set, interrupt sequence is sent to remote target."),
14019 &remote_set_cmdlist, &remote_show_cmdlist);
14021 /* Install commands for configuring memory read/write packets. */
14023 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
14024 Set the maximum number of bytes per memory write packet (deprecated)."),
14026 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
14027 Show the maximum number of bytes per memory write packet (deprecated)."),
14029 add_cmd ("memory-write-packet-size", no_class,
14030 set_memory_write_packet_size, _("\
14031 Set the maximum number of bytes per memory-write packet.\n\
14032 Specify the number of bytes in a packet or 0 (zero) for the\n\
14033 default packet size. The actual limit is further reduced\n\
14034 dependent on the target. Specify ``fixed'' to disable the\n\
14035 further restriction and ``limit'' to enable that restriction."),
14036 &remote_set_cmdlist);
14037 add_cmd ("memory-read-packet-size", no_class,
14038 set_memory_read_packet_size, _("\
14039 Set the maximum number of bytes per memory-read packet.\n\
14040 Specify the number of bytes in a packet or 0 (zero) for the\n\
14041 default packet size. The actual limit is further reduced\n\
14042 dependent on the target. Specify ``fixed'' to disable the\n\
14043 further restriction and ``limit'' to enable that restriction."),
14044 &remote_set_cmdlist);
14045 add_cmd ("memory-write-packet-size", no_class,
14046 show_memory_write_packet_size,
14047 _("Show the maximum number of bytes per memory-write packet."),
14048 &remote_show_cmdlist);
14049 add_cmd ("memory-read-packet-size", no_class,
14050 show_memory_read_packet_size,
14051 _("Show the maximum number of bytes per memory-read packet."),
14052 &remote_show_cmdlist);
14054 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
14055 &remote_hw_watchpoint_limit, _("\
14056 Set the maximum number of target hardware watchpoints."), _("\
14057 Show the maximum number of target hardware watchpoints."), _("\
14058 Specify a negative limit for unlimited."),
14059 NULL, NULL, /* FIXME: i18n: The maximum
14060 number of target hardware
14061 watchpoints is %s. */
14062 &remote_set_cmdlist, &remote_show_cmdlist);
14063 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class,
14064 &remote_hw_watchpoint_length_limit, _("\
14065 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14066 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14067 Specify a negative limit for unlimited."),
14068 NULL, NULL, /* FIXME: i18n: The maximum
14069 length (in bytes) of a target
14070 hardware watchpoint is %s. */
14071 &remote_set_cmdlist, &remote_show_cmdlist);
14072 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
14073 &remote_hw_breakpoint_limit, _("\
14074 Set the maximum number of target hardware breakpoints."), _("\
14075 Show the maximum number of target hardware breakpoints."), _("\
14076 Specify a negative limit for unlimited."),
14077 NULL, NULL, /* FIXME: i18n: The maximum
14078 number of target hardware
14079 breakpoints is %s. */
14080 &remote_set_cmdlist, &remote_show_cmdlist);
14082 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure,
14083 &remote_address_size, _("\
14084 Set the maximum size of the address (in bits) in a memory packet."), _("\
14085 Show the maximum size of the address (in bits) in a memory packet."), NULL,
14087 NULL, /* FIXME: i18n: */
14088 &setlist, &showlist);
14090 init_all_packet_configs ();
14092 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
14093 "X", "binary-download", 1);
14095 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
14096 "vCont", "verbose-resume", 0);
14098 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
14099 "QPassSignals", "pass-signals", 0);
14101 add_packet_config_cmd (&remote_protocol_packets[PACKET_QCatchSyscalls],
14102 "QCatchSyscalls", "catch-syscalls", 0);
14104 add_packet_config_cmd (&remote_protocol_packets[PACKET_QProgramSignals],
14105 "QProgramSignals", "program-signals", 0);
14107 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
14108 "qSymbol", "symbol-lookup", 0);
14110 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
14111 "P", "set-register", 1);
14113 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
14114 "p", "fetch-register", 1);
14116 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
14117 "Z0", "software-breakpoint", 0);
14119 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
14120 "Z1", "hardware-breakpoint", 0);
14122 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
14123 "Z2", "write-watchpoint", 0);
14125 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
14126 "Z3", "read-watchpoint", 0);
14128 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
14129 "Z4", "access-watchpoint", 0);
14131 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
14132 "qXfer:auxv:read", "read-aux-vector", 0);
14134 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_exec_file],
14135 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14137 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
14138 "qXfer:features:read", "target-features", 0);
14140 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
14141 "qXfer:libraries:read", "library-info", 0);
14143 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4],
14144 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14146 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
14147 "qXfer:memory-map:read", "memory-map", 0);
14149 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
14150 "qXfer:spu:read", "read-spu-object", 0);
14152 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
14153 "qXfer:spu:write", "write-spu-object", 0);
14155 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
14156 "qXfer:osdata:read", "osdata", 0);
14158 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
14159 "qXfer:threads:read", "threads", 0);
14161 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
14162 "qXfer:siginfo:read", "read-siginfo-object", 0);
14164 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
14165 "qXfer:siginfo:write", "write-siginfo-object", 0);
14167 add_packet_config_cmd
14168 (&remote_protocol_packets[PACKET_qXfer_traceframe_info],
14169 "qXfer:traceframe-info:read", "traceframe-info", 0);
14171 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_uib],
14172 "qXfer:uib:read", "unwind-info-block", 0);
14174 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
14175 "qGetTLSAddr", "get-thread-local-storage-address",
14178 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr],
14179 "qGetTIBAddr", "get-thread-information-block-address",
14182 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
14183 "bc", "reverse-continue", 0);
14185 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
14186 "bs", "reverse-step", 0);
14188 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
14189 "qSupported", "supported-packets", 0);
14191 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
14192 "qSearch:memory", "search-memory", 0);
14194 add_packet_config_cmd (&remote_protocol_packets[PACKET_qTStatus],
14195 "qTStatus", "trace-status", 0);
14197 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_setfs],
14198 "vFile:setfs", "hostio-setfs", 0);
14200 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
14201 "vFile:open", "hostio-open", 0);
14203 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
14204 "vFile:pread", "hostio-pread", 0);
14206 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
14207 "vFile:pwrite", "hostio-pwrite", 0);
14209 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
14210 "vFile:close", "hostio-close", 0);
14212 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
14213 "vFile:unlink", "hostio-unlink", 0);
14215 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink],
14216 "vFile:readlink", "hostio-readlink", 0);
14218 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_fstat],
14219 "vFile:fstat", "hostio-fstat", 0);
14221 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
14222 "vAttach", "attach", 0);
14224 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
14227 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
14228 "QStartNoAckMode", "noack", 0);
14230 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
14231 "vKill", "kill", 0);
14233 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
14234 "qAttached", "query-attached", 0);
14236 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
14237 "ConditionalTracepoints",
14238 "conditional-tracepoints", 0);
14240 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints],
14241 "ConditionalBreakpoints",
14242 "conditional-breakpoints", 0);
14244 add_packet_config_cmd (&remote_protocol_packets[PACKET_BreakpointCommands],
14245 "BreakpointCommands",
14246 "breakpoint-commands", 0);
14248 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
14249 "FastTracepoints", "fast-tracepoints", 0);
14251 add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource],
14252 "TracepointSource", "TracepointSource", 0);
14254 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow],
14255 "QAllow", "allow", 0);
14257 add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints],
14258 "StaticTracepoints", "static-tracepoints", 0);
14260 add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace],
14261 "InstallInTrace", "install-in-trace", 0);
14263 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read],
14264 "qXfer:statictrace:read", "read-sdata-object", 0);
14266 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic],
14267 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14269 add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization],
14270 "QDisableRandomization", "disable-randomization", 0);
14272 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAgent],
14273 "QAgent", "agent", 0);
14275 add_packet_config_cmd (&remote_protocol_packets[PACKET_QTBuffer_size],
14276 "QTBuffer:size", "trace-buffer-size", 0);
14278 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_off],
14279 "Qbtrace:off", "disable-btrace", 0);
14281 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts],
14282 "Qbtrace:bts", "enable-btrace-bts", 0);
14284 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_pt],
14285 "Qbtrace:pt", "enable-btrace-pt", 0);
14287 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace],
14288 "qXfer:btrace", "read-btrace", 0);
14290 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace_conf],
14291 "qXfer:btrace-conf", "read-btrace-conf", 0);
14293 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_bts_size],
14294 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14296 add_packet_config_cmd (&remote_protocol_packets[PACKET_multiprocess_feature],
14297 "multiprocess-feature", "multiprocess-feature", 0);
14299 add_packet_config_cmd (&remote_protocol_packets[PACKET_swbreak_feature],
14300 "swbreak-feature", "swbreak-feature", 0);
14302 add_packet_config_cmd (&remote_protocol_packets[PACKET_hwbreak_feature],
14303 "hwbreak-feature", "hwbreak-feature", 0);
14305 add_packet_config_cmd (&remote_protocol_packets[PACKET_fork_event_feature],
14306 "fork-event-feature", "fork-event-feature", 0);
14308 add_packet_config_cmd (&remote_protocol_packets[PACKET_vfork_event_feature],
14309 "vfork-event-feature", "vfork-event-feature", 0);
14311 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_pt_size],
14312 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14314 add_packet_config_cmd (&remote_protocol_packets[PACKET_vContSupported],
14315 "vContSupported", "verbose-resume-supported", 0);
14317 add_packet_config_cmd (&remote_protocol_packets[PACKET_exec_event_feature],
14318 "exec-event-feature", "exec-event-feature", 0);
14320 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCtrlC],
14321 "vCtrlC", "ctrl-c", 0);
14323 add_packet_config_cmd (&remote_protocol_packets[PACKET_QThreadEvents],
14324 "QThreadEvents", "thread-events", 0);
14326 add_packet_config_cmd (&remote_protocol_packets[PACKET_no_resumed],
14327 "N stop reply", "no-resumed-stop-reply", 0);
14329 /* Assert that we've registered "set remote foo-packet" commands
14330 for all packet configs. */
14334 for (i = 0; i < PACKET_MAX; i++)
14336 /* Ideally all configs would have a command associated. Some
14337 still don't though. */
14342 case PACKET_QNonStop:
14343 case PACKET_EnableDisableTracepoints_feature:
14344 case PACKET_tracenz_feature:
14345 case PACKET_DisconnectedTracing_feature:
14346 case PACKET_augmented_libraries_svr4_read_feature:
14348 /* Additions to this list need to be well justified:
14349 pre-existing packets are OK; new packets are not. */
14357 /* This catches both forgetting to add a config command, and
14358 forgetting to remove a packet from the exception list. */
14359 gdb_assert (excepted == (remote_protocol_packets[i].name == NULL));
14363 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14364 Z sub-packet has its own set and show commands, but users may
14365 have sets to this variable in their .gdbinit files (or in their
14367 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
14368 &remote_Z_packet_detect, _("\
14369 Set use of remote protocol `Z' packets"), _("\
14370 Show use of remote protocol `Z' packets "), _("\
14371 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14373 set_remote_protocol_Z_packet_cmd,
14374 show_remote_protocol_Z_packet_cmd,
14375 /* FIXME: i18n: Use of remote protocol
14376 `Z' packets is %s. */
14377 &remote_set_cmdlist, &remote_show_cmdlist);
14379 add_prefix_cmd ("remote", class_files, remote_command, _("\
14380 Manipulate files on the remote system\n\
14381 Transfer files to and from the remote target system."),
14382 &remote_cmdlist, "remote ",
14383 0 /* allow-unknown */, &cmdlist);
14385 add_cmd ("put", class_files, remote_put_command,
14386 _("Copy a local file to the remote system."),
14389 add_cmd ("get", class_files, remote_get_command,
14390 _("Copy a remote file to the local system."),
14393 add_cmd ("delete", class_files, remote_delete_command,
14394 _("Delete a remote file."),
14397 add_setshow_string_noescape_cmd ("exec-file", class_files,
14398 &remote_exec_file_var, _("\
14399 Set the remote pathname for \"run\""), _("\
14400 Show the remote pathname for \"run\""), NULL,
14401 set_remote_exec_file,
14402 show_remote_exec_file,
14403 &remote_set_cmdlist,
14404 &remote_show_cmdlist);
14406 add_setshow_boolean_cmd ("range-stepping", class_run,
14407 &use_range_stepping, _("\
14408 Enable or disable range stepping."), _("\
14409 Show whether target-assisted range stepping is enabled."), _("\
14410 If on, and the target supports it, when stepping a source line, GDB\n\
14411 tells the target to step the corresponding range of addresses itself instead\n\
14412 of issuing multiple single-steps. This speeds up source level\n\
14413 stepping. If off, GDB always issues single-steps, even if range\n\
14414 stepping is supported by the target. The default is on."),
14415 set_range_stepping,
14416 show_range_stepping,
14420 /* Eventually initialize fileio. See fileio.c */
14421 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
14423 /* Take advantage of the fact that the TID field is not used, to tag
14424 special ptids with it set to != 0. */
14425 magic_null_ptid = ptid_build (42000, -1, 1);
14426 not_sent_ptid = ptid_build (42000, -2, 1);
14427 any_thread_ptid = ptid_build (42000, 0, 1);
14429 target_buf_size = 2048;
14430 target_buf = (char *) xmalloc (target_buf_size);