1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2016 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"
74 /* Temp hacks for tracepoint encoding migration. */
75 static char *target_buf;
76 static long target_buf_size;
78 /* Per-program-space data key. */
79 static const struct program_space_data *remote_pspace_data;
81 /* The variable registered as the control variable used by the
82 remote exec-file commands. While the remote exec-file setting is
83 per-program-space, the set/show machinery uses this as the
84 location of the remote exec-file value. */
85 static char *remote_exec_file_var;
87 /* The size to align memory write packets, when practical. The protocol
88 does not guarantee any alignment, and gdb will generate short
89 writes and unaligned writes, but even as a best-effort attempt this
90 can improve bulk transfers. For instance, if a write is misaligned
91 relative to the target's data bus, the stub may need to make an extra
92 round trip fetching data from the target. This doesn't make a
93 huge difference, but it's easy to do, so we try to be helpful.
95 The alignment chosen is arbitrary; usually data bus width is
96 important here, not the possibly larger cache line size. */
97 enum { REMOTE_ALIGN_WRITES = 16 };
99 /* Prototypes for local functions. */
100 static void async_cleanup_sigint_signal_handler (void *dummy);
101 static int getpkt_sane (char **buf, long *sizeof_buf, int forever);
102 static int getpkt_or_notif_sane (char **buf, long *sizeof_buf,
103 int forever, int *is_notif);
105 static void async_handle_remote_sigint (int);
106 static void async_handle_remote_sigint_twice (int);
108 static void remote_files_info (struct target_ops *ignore);
110 static void remote_prepare_to_store (struct target_ops *self,
111 struct regcache *regcache);
113 static void remote_open_1 (const char *, int, struct target_ops *,
116 static void remote_close (struct target_ops *self);
120 static int remote_vkill (int pid, struct remote_state *rs);
122 static void remote_kill_k (void);
124 static void remote_mourn (struct target_ops *ops);
126 static void extended_remote_restart (void);
128 static void remote_send (char **buf, long *sizeof_buf_p);
130 static int readchar (int timeout);
132 static void remote_serial_write (const char *str, int len);
134 static void remote_kill (struct target_ops *ops);
136 static int remote_can_async_p (struct target_ops *);
138 static int remote_is_async_p (struct target_ops *);
140 static void remote_async (struct target_ops *ops, int enable);
142 static void remote_thread_events (struct target_ops *ops, int enable);
144 static void sync_remote_interrupt_twice (int signo);
146 static void interrupt_query (void);
148 static void set_general_thread (struct ptid ptid);
149 static void set_continue_thread (struct ptid ptid);
151 static void get_offsets (void);
153 static void skip_frame (void);
155 static long read_frame (char **buf_p, long *sizeof_buf);
157 static int hexnumlen (ULONGEST num);
159 static void init_remote_ops (void);
161 static void init_extended_remote_ops (void);
163 static void remote_stop (struct target_ops *self, ptid_t);
165 static int stubhex (int ch);
167 static int hexnumstr (char *, ULONGEST);
169 static int hexnumnstr (char *, ULONGEST, int);
171 static CORE_ADDR remote_address_masked (CORE_ADDR);
173 static void print_packet (const char *);
175 static void compare_sections_command (char *, int);
177 static void packet_command (char *, int);
179 static int stub_unpack_int (char *buff, int fieldlength);
181 static ptid_t remote_current_thread (ptid_t oldptid);
183 static int putpkt_binary (const char *buf, int cnt);
185 static void check_binary_download (CORE_ADDR addr);
187 struct packet_config;
189 static void show_packet_config_cmd (struct packet_config *config);
191 static void show_remote_protocol_packet_cmd (struct ui_file *file,
193 struct cmd_list_element *c,
196 static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid);
197 static ptid_t read_ptid (char *buf, char **obuf);
199 static void remote_set_permissions (struct target_ops *self);
201 static int remote_get_trace_status (struct target_ops *self,
202 struct trace_status *ts);
204 static int remote_upload_tracepoints (struct target_ops *self,
205 struct uploaded_tp **utpp);
207 static int remote_upload_trace_state_variables (struct target_ops *self,
208 struct uploaded_tsv **utsvp);
210 static void remote_query_supported (void);
212 static void remote_check_symbols (void);
214 void _initialize_remote (void);
217 static void stop_reply_xfree (struct stop_reply *);
218 static void remote_parse_stop_reply (char *, struct stop_reply *);
219 static void push_stop_reply (struct stop_reply *);
220 static void discard_pending_stop_replies_in_queue (struct remote_state *);
221 static int peek_stop_reply (ptid_t ptid);
223 struct threads_listing_context;
224 static void remove_new_fork_children (struct threads_listing_context *);
226 static void remote_async_inferior_event_handler (gdb_client_data);
228 static void remote_terminal_ours (struct target_ops *self);
230 static int remote_read_description_p (struct target_ops *target);
232 static void remote_console_output (char *msg);
234 static int remote_supports_cond_breakpoints (struct target_ops *self);
236 static int remote_can_run_breakpoint_commands (struct target_ops *self);
238 static void remote_btrace_reset (void);
240 static int stop_reply_queue_length (void);
242 static void readahead_cache_invalidate (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 /* Data for the vFile:pread readahead cache. */
288 struct readahead_cache
290 /* The file descriptor for the file that is being cached. -1 if the
294 /* The offset into the file that the cache buffer corresponds
298 /* The buffer holding the cache contents. */
300 /* The buffer's size. We try to read as much as fits into a packet
304 /* Cache hit and miss counters. */
309 /* Description of the remote protocol state for the currently
310 connected target. This is per-target state, and independent of the
311 selected architecture. */
315 /* A buffer to use for incoming packets, and its current size. The
316 buffer is grown dynamically for larger incoming packets.
317 Outgoing packets may also be constructed in this buffer.
318 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
319 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
324 /* True if we're going through initial connection setup (finding out
325 about the remote side's threads, relocating symbols, etc.). */
328 /* If we negotiated packet size explicitly (and thus can bypass
329 heuristics for the largest packet size that will not overflow
330 a buffer in the stub), this will be set to that packet size.
331 Otherwise zero, meaning to use the guessed size. */
332 long explicit_packet_size;
334 /* remote_wait is normally called when the target is running and
335 waits for a stop reply packet. But sometimes we need to call it
336 when the target is already stopped. We can send a "?" packet
337 and have remote_wait read the response. Or, if we already have
338 the response, we can stash it in BUF and tell remote_wait to
339 skip calling getpkt. This flag is set when BUF contains a
340 stop reply packet and the target is not waiting. */
341 int cached_wait_status;
343 /* True, if in no ack mode. That is, neither GDB nor the stub will
344 expect acks from each other. The connection is assumed to be
348 /* True if we're connected in extended remote mode. */
351 /* True if we resumed the target and we're waiting for the target to
352 stop. In the mean time, we can't start another command/query.
353 The remote server wouldn't be ready to process it, so we'd
354 timeout waiting for a reply that would never come and eventually
355 we'd close the connection. This can happen in asynchronous mode
356 because we allow GDB commands while the target is running. */
357 int waiting_for_stop_reply;
359 /* The status of the stub support for the various vCont actions. */
360 struct vCont_action_support supports_vCont;
362 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
363 responded to that. */
366 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
367 remote_open knows that we don't have a file open when the program
369 struct serial *remote_desc;
371 /* These are the threads which we last sent to the remote system. The
372 TID member will be -1 for all or -2 for not sent yet. */
373 ptid_t general_thread;
374 ptid_t continue_thread;
376 /* This is the traceframe which we last selected on the remote system.
377 It will be -1 if no traceframe is selected. */
378 int remote_traceframe_number;
380 char *last_pass_packet;
382 /* The last QProgramSignals packet sent to the target. We bypass
383 sending a new program signals list down to the target if the new
384 packet is exactly the same as the last we sent. IOW, we only let
385 the target know about program signals list changes. */
386 char *last_program_signals_packet;
388 enum gdb_signal last_sent_signal;
392 char *finished_object;
393 char *finished_annex;
394 ULONGEST finished_offset;
396 /* Should we try the 'ThreadInfo' query packet?
398 This variable (NOT available to the user: auto-detect only!)
399 determines whether GDB will use the new, simpler "ThreadInfo"
400 query or the older, more complex syntax for thread queries.
401 This is an auto-detect variable (set to true at each connect,
402 and set to false when the target fails to recognize it). */
403 int use_threadinfo_query;
404 int use_threadextra_query;
406 threadref echo_nextthread;
407 threadref nextthread;
408 threadref resultthreadlist[MAXTHREADLISTRESULTS];
410 /* The state of remote notification. */
411 struct remote_notif_state *notif_state;
413 /* The branch trace configuration. */
414 struct btrace_config btrace_config;
416 /* The argument to the last "vFile:setfs:" packet we sent, used
417 to avoid sending repeated unnecessary "vFile:setfs:" packets.
418 Initialized to -1 to indicate that no "vFile:setfs:" packet
419 has yet been sent. */
422 /* A readahead cache for vFile:pread. Often, reading a binary
423 involves a sequence of small reads. E.g., when parsing an ELF
424 file. A readahead cache helps mostly the case of remote
425 debugging on a connection with higher latency, due to the
426 request/reply nature of the RSP. We only cache data for a single
427 file descriptor at a time. */
428 struct readahead_cache readahead_cache;
431 /* Private data that we'll store in (struct thread_info)->private. */
432 struct private_thread_info
438 /* Whether the target stopped for a breakpoint/watchpoint. */
439 enum target_stop_reason stop_reason;
441 /* This is set to the data address of the access causing the target
442 to stop for a watchpoint. */
443 CORE_ADDR watch_data_address;
447 free_private_thread_info (struct private_thread_info *info)
454 /* This data could be associated with a target, but we do not always
455 have access to the current target when we need it, so for now it is
456 static. This will be fine for as long as only one target is in use
458 static struct remote_state *remote_state;
460 static struct remote_state *
461 get_remote_state_raw (void)
466 /* Allocate a new struct remote_state with xmalloc, initialize it, and
469 static struct remote_state *
470 new_remote_state (void)
472 struct remote_state *result = XCNEW (struct remote_state);
474 /* The default buffer size is unimportant; it will be expanded
475 whenever a larger buffer is needed. */
476 result->buf_size = 400;
477 result->buf = (char *) xmalloc (result->buf_size);
478 result->remote_traceframe_number = -1;
479 result->last_sent_signal = GDB_SIGNAL_0;
485 /* Description of the remote protocol for a given architecture. */
489 long offset; /* Offset into G packet. */
490 long regnum; /* GDB's internal register number. */
491 LONGEST pnum; /* Remote protocol register number. */
492 int in_g_packet; /* Always part of G packet. */
493 /* long size in bytes; == register_size (target_gdbarch (), regnum);
495 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
499 struct remote_arch_state
501 /* Description of the remote protocol registers. */
502 long sizeof_g_packet;
504 /* Description of the remote protocol registers indexed by REGNUM
505 (making an array gdbarch_num_regs in size). */
506 struct packet_reg *regs;
508 /* This is the size (in chars) of the first response to the ``g''
509 packet. It is used as a heuristic when determining the maximum
510 size of memory-read and memory-write packets. A target will
511 typically only reserve a buffer large enough to hold the ``g''
512 packet. The size does not include packet overhead (headers and
514 long actual_register_packet_size;
516 /* This is the maximum size (in chars) of a non read/write packet.
517 It is also used as a cap on the size of read/write packets. */
518 long remote_packet_size;
521 /* Utility: generate error from an incoming stub packet. */
523 trace_error (char *buf)
526 return; /* not an error msg */
529 case '1': /* malformed packet error */
530 if (*++buf == '0') /* general case: */
531 error (_("remote.c: error in outgoing packet."));
533 error (_("remote.c: error in outgoing packet at field #%ld."),
534 strtol (buf, NULL, 16));
536 error (_("Target returns error code '%s'."), buf);
540 /* Utility: wait for reply from stub, while accepting "O" packets. */
542 remote_get_noisy_reply (char **buf_p,
545 do /* Loop on reply from remote stub. */
549 QUIT; /* Allow user to bail out with ^C. */
550 getpkt (buf_p, sizeof_buf, 0);
554 else if (startswith (buf, "qRelocInsn:"))
557 CORE_ADDR from, to, org_to;
559 int adjusted_size = 0;
562 p = buf + strlen ("qRelocInsn:");
563 pp = unpack_varlen_hex (p, &ul);
565 error (_("invalid qRelocInsn packet: %s"), buf);
569 unpack_varlen_hex (p, &ul);
576 gdbarch_relocate_instruction (target_gdbarch (), &to, from);
579 CATCH (ex, RETURN_MASK_ALL)
581 if (ex.error == MEMORY_ERROR)
583 /* Propagate memory errors silently back to the
584 target. The stub may have limited the range of
585 addresses we can write to, for example. */
589 /* Something unexpectedly bad happened. Be verbose
590 so we can tell what, and propagate the error back
591 to the stub, so it doesn't get stuck waiting for
593 exception_fprintf (gdb_stderr, ex,
594 _("warning: relocating instruction: "));
602 adjusted_size = to - org_to;
604 xsnprintf (buf, *sizeof_buf, "qRelocInsn:%x", adjusted_size);
608 else if (buf[0] == 'O' && buf[1] != 'K')
609 remote_console_output (buf + 1); /* 'O' message from stub */
611 return buf; /* Here's the actual reply. */
616 /* Handle for retreving the remote protocol data from gdbarch. */
617 static struct gdbarch_data *remote_gdbarch_data_handle;
619 static struct remote_arch_state *
620 get_remote_arch_state (void)
622 gdb_assert (target_gdbarch () != NULL);
623 return ((struct remote_arch_state *)
624 gdbarch_data (target_gdbarch (), remote_gdbarch_data_handle));
627 /* Fetch the global remote target state. */
629 static struct remote_state *
630 get_remote_state (void)
632 /* Make sure that the remote architecture state has been
633 initialized, because doing so might reallocate rs->buf. Any
634 function which calls getpkt also needs to be mindful of changes
635 to rs->buf, but this call limits the number of places which run
637 get_remote_arch_state ();
639 return get_remote_state_raw ();
642 /* Cleanup routine for the remote module's pspace data. */
645 remote_pspace_data_cleanup (struct program_space *pspace, void *arg)
647 char *remote_exec_file = (char *) arg;
649 xfree (remote_exec_file);
652 /* Fetch the remote exec-file from the current program space. */
655 get_remote_exec_file (void)
657 char *remote_exec_file;
660 = (char *) program_space_data (current_program_space,
662 if (remote_exec_file == NULL)
665 return remote_exec_file;
668 /* Set the remote exec file for PSPACE. */
671 set_pspace_remote_exec_file (struct program_space *pspace,
672 char *remote_exec_file)
674 char *old_file = (char *) program_space_data (pspace, remote_pspace_data);
677 set_program_space_data (pspace, remote_pspace_data,
678 xstrdup (remote_exec_file));
681 /* The "set/show remote exec-file" set command hook. */
684 set_remote_exec_file (char *ignored, int from_tty,
685 struct cmd_list_element *c)
687 gdb_assert (remote_exec_file_var != NULL);
688 set_pspace_remote_exec_file (current_program_space, remote_exec_file_var);
691 /* The "set/show remote exec-file" show command hook. */
694 show_remote_exec_file (struct ui_file *file, int from_tty,
695 struct cmd_list_element *cmd, const char *value)
697 fprintf_filtered (file, "%s\n", remote_exec_file_var);
701 compare_pnums (const void *lhs_, const void *rhs_)
703 const struct packet_reg * const *lhs
704 = (const struct packet_reg * const *) lhs_;
705 const struct packet_reg * const *rhs
706 = (const struct packet_reg * const *) rhs_;
708 if ((*lhs)->pnum < (*rhs)->pnum)
710 else if ((*lhs)->pnum == (*rhs)->pnum)
717 map_regcache_remote_table (struct gdbarch *gdbarch, struct packet_reg *regs)
719 int regnum, num_remote_regs, offset;
720 struct packet_reg **remote_regs;
722 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
724 struct packet_reg *r = ®s[regnum];
726 if (register_size (gdbarch, regnum) == 0)
727 /* Do not try to fetch zero-sized (placeholder) registers. */
730 r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
735 /* Define the g/G packet format as the contents of each register
736 with a remote protocol number, in order of ascending protocol
739 remote_regs = XALLOCAVEC (struct packet_reg *, gdbarch_num_regs (gdbarch));
740 for (num_remote_regs = 0, regnum = 0;
741 regnum < gdbarch_num_regs (gdbarch);
743 if (regs[regnum].pnum != -1)
744 remote_regs[num_remote_regs++] = ®s[regnum];
746 qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
749 for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
751 remote_regs[regnum]->in_g_packet = 1;
752 remote_regs[regnum]->offset = offset;
753 offset += register_size (gdbarch, remote_regs[regnum]->regnum);
759 /* Given the architecture described by GDBARCH, return the remote
760 protocol register's number and the register's offset in the g/G
761 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
762 If the target does not have a mapping for REGNUM, return false,
763 otherwise, return true. */
766 remote_register_number_and_offset (struct gdbarch *gdbarch, int regnum,
767 int *pnum, int *poffset)
769 struct packet_reg *regs;
770 struct cleanup *old_chain;
772 gdb_assert (regnum < gdbarch_num_regs (gdbarch));
774 regs = XCNEWVEC (struct packet_reg, gdbarch_num_regs (gdbarch));
775 old_chain = make_cleanup (xfree, regs);
777 map_regcache_remote_table (gdbarch, regs);
779 *pnum = regs[regnum].pnum;
780 *poffset = regs[regnum].offset;
782 do_cleanups (old_chain);
788 init_remote_state (struct gdbarch *gdbarch)
790 struct remote_state *rs = get_remote_state_raw ();
791 struct remote_arch_state *rsa;
793 rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state);
795 /* Use the architecture to build a regnum<->pnum table, which will be
796 1:1 unless a feature set specifies otherwise. */
797 rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch,
798 gdbarch_num_regs (gdbarch),
801 /* Record the maximum possible size of the g packet - it may turn out
803 rsa->sizeof_g_packet = map_regcache_remote_table (gdbarch, rsa->regs);
805 /* Default maximum number of characters in a packet body. Many
806 remote stubs have a hardwired buffer size of 400 bytes
807 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
808 as the maximum packet-size to ensure that the packet and an extra
809 NUL character can always fit in the buffer. This stops GDB
810 trashing stubs that try to squeeze an extra NUL into what is
811 already a full buffer (As of 1999-12-04 that was most stubs). */
812 rsa->remote_packet_size = 400 - 1;
814 /* This one is filled in when a ``g'' packet is received. */
815 rsa->actual_register_packet_size = 0;
817 /* Should rsa->sizeof_g_packet needs more space than the
818 default, adjust the size accordingly. Remember that each byte is
819 encoded as two characters. 32 is the overhead for the packet
820 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
821 (``$NN:G...#NN'') is a better guess, the below has been padded a
823 if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2))
824 rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32);
826 /* Make sure that the packet buffer is plenty big enough for
827 this architecture. */
828 if (rs->buf_size < rsa->remote_packet_size)
830 rs->buf_size = 2 * rsa->remote_packet_size;
831 rs->buf = (char *) xrealloc (rs->buf, rs->buf_size);
837 /* Return the current allowed size of a remote packet. This is
838 inferred from the current architecture, and should be used to
839 limit the length of outgoing packets. */
841 get_remote_packet_size (void)
843 struct remote_state *rs = get_remote_state ();
844 struct remote_arch_state *rsa = get_remote_arch_state ();
846 if (rs->explicit_packet_size)
847 return rs->explicit_packet_size;
849 return rsa->remote_packet_size;
852 static struct packet_reg *
853 packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
855 if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch ()))
859 struct packet_reg *r = &rsa->regs[regnum];
861 gdb_assert (r->regnum == regnum);
866 static struct packet_reg *
867 packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
871 for (i = 0; i < gdbarch_num_regs (target_gdbarch ()); i++)
873 struct packet_reg *r = &rsa->regs[i];
881 static struct target_ops remote_ops;
883 static struct target_ops extended_remote_ops;
885 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
886 ``forever'' still use the normal timeout mechanism. This is
887 currently used by the ASYNC code to guarentee that target reads
888 during the initial connect always time-out. Once getpkt has been
889 modified to return a timeout indication and, in turn
890 remote_wait()/wait_for_inferior() have gained a timeout parameter
892 static int wait_forever_enabled_p = 1;
894 /* Allow the user to specify what sequence to send to the remote
895 when he requests a program interruption: Although ^C is usually
896 what remote systems expect (this is the default, here), it is
897 sometimes preferable to send a break. On other systems such
898 as the Linux kernel, a break followed by g, which is Magic SysRq g
899 is required in order to interrupt the execution. */
900 const char interrupt_sequence_control_c[] = "Ctrl-C";
901 const char interrupt_sequence_break[] = "BREAK";
902 const char interrupt_sequence_break_g[] = "BREAK-g";
903 static const char *const interrupt_sequence_modes[] =
905 interrupt_sequence_control_c,
906 interrupt_sequence_break,
907 interrupt_sequence_break_g,
910 static const char *interrupt_sequence_mode = interrupt_sequence_control_c;
913 show_interrupt_sequence (struct ui_file *file, int from_tty,
914 struct cmd_list_element *c,
917 if (interrupt_sequence_mode == interrupt_sequence_control_c)
918 fprintf_filtered (file,
919 _("Send the ASCII ETX character (Ctrl-c) "
920 "to the remote target to interrupt the "
921 "execution of the program.\n"));
922 else if (interrupt_sequence_mode == interrupt_sequence_break)
923 fprintf_filtered (file,
924 _("send a break signal to the remote target "
925 "to interrupt the execution of the program.\n"));
926 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
927 fprintf_filtered (file,
928 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
929 "the remote target to interrupt the execution "
930 "of Linux kernel.\n"));
932 internal_error (__FILE__, __LINE__,
933 _("Invalid value for interrupt_sequence_mode: %s."),
934 interrupt_sequence_mode);
937 /* This boolean variable specifies whether interrupt_sequence is sent
938 to the remote target when gdb connects to it.
939 This is mostly needed when you debug the Linux kernel: The Linux kernel
940 expects BREAK g which is Magic SysRq g for connecting gdb. */
941 static int interrupt_on_connect = 0;
943 /* This variable is used to implement the "set/show remotebreak" commands.
944 Since these commands are now deprecated in favor of "set/show remote
945 interrupt-sequence", it no longer has any effect on the code. */
946 static int remote_break;
949 set_remotebreak (char *args, int from_tty, struct cmd_list_element *c)
952 interrupt_sequence_mode = interrupt_sequence_break;
954 interrupt_sequence_mode = interrupt_sequence_control_c;
958 show_remotebreak (struct ui_file *file, int from_tty,
959 struct cmd_list_element *c,
964 /* This variable sets the number of bits in an address that are to be
965 sent in a memory ("M" or "m") packet. Normally, after stripping
966 leading zeros, the entire address would be sent. This variable
967 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
968 initial implementation of remote.c restricted the address sent in
969 memory packets to ``host::sizeof long'' bytes - (typically 32
970 bits). Consequently, for 64 bit targets, the upper 32 bits of an
971 address was never sent. Since fixing this bug may cause a break in
972 some remote targets this variable is principly provided to
973 facilitate backward compatibility. */
975 static unsigned int remote_address_size;
977 /* Temporary to track who currently owns the terminal. See
978 remote_terminal_* for more details. */
980 static int remote_async_terminal_ours_p;
983 /* User configurable variables for the number of characters in a
984 memory read/write packet. MIN (rsa->remote_packet_size,
985 rsa->sizeof_g_packet) is the default. Some targets need smaller
986 values (fifo overruns, et.al.) and some users need larger values
987 (speed up transfers). The variables ``preferred_*'' (the user
988 request), ``current_*'' (what was actually set) and ``forced_*''
989 (Positive - a soft limit, negative - a hard limit). */
991 struct memory_packet_config
998 /* The default max memory-write-packet-size. The 16k is historical.
999 (It came from older GDB's using alloca for buffers and the
1000 knowledge (folklore?) that some hosts don't cope very well with
1001 large alloca calls.) */
1002 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1004 /* The minimum remote packet size for memory transfers. Ensures we
1005 can write at least one byte. */
1006 #define MIN_MEMORY_PACKET_SIZE 20
1008 /* Compute the current size of a read/write packet. Since this makes
1009 use of ``actual_register_packet_size'' the computation is dynamic. */
1012 get_memory_packet_size (struct memory_packet_config *config)
1014 struct remote_state *rs = get_remote_state ();
1015 struct remote_arch_state *rsa = get_remote_arch_state ();
1018 if (config->fixed_p)
1020 if (config->size <= 0)
1021 what_they_get = DEFAULT_MAX_MEMORY_PACKET_SIZE;
1023 what_they_get = config->size;
1027 what_they_get = get_remote_packet_size ();
1028 /* Limit the packet to the size specified by the user. */
1029 if (config->size > 0
1030 && what_they_get > config->size)
1031 what_they_get = config->size;
1033 /* Limit it to the size of the targets ``g'' response unless we have
1034 permission from the stub to use a larger packet size. */
1035 if (rs->explicit_packet_size == 0
1036 && rsa->actual_register_packet_size > 0
1037 && what_they_get > rsa->actual_register_packet_size)
1038 what_they_get = rsa->actual_register_packet_size;
1040 if (what_they_get < MIN_MEMORY_PACKET_SIZE)
1041 what_they_get = MIN_MEMORY_PACKET_SIZE;
1043 /* Make sure there is room in the global buffer for this packet
1044 (including its trailing NUL byte). */
1045 if (rs->buf_size < what_they_get + 1)
1047 rs->buf_size = 2 * what_they_get;
1048 rs->buf = (char *) xrealloc (rs->buf, 2 * what_they_get);
1051 return what_they_get;
1054 /* Update the size of a read/write packet. If they user wants
1055 something really big then do a sanity check. */
1058 set_memory_packet_size (char *args, struct memory_packet_config *config)
1060 int fixed_p = config->fixed_p;
1061 long size = config->size;
1064 error (_("Argument required (integer, `fixed' or `limited')."));
1065 else if (strcmp (args, "hard") == 0
1066 || strcmp (args, "fixed") == 0)
1068 else if (strcmp (args, "soft") == 0
1069 || strcmp (args, "limit") == 0)
1075 size = strtoul (args, &end, 0);
1077 error (_("Invalid %s (bad syntax)."), config->name);
1079 /* Instead of explicitly capping the size of a packet to or
1080 disallowing it, the user is allowed to set the size to
1081 something arbitrarily large. */
1084 /* So that the query shows the correct value. */
1086 size = DEFAULT_MAX_MEMORY_PACKET_SIZE;
1089 if (fixed_p && !config->fixed_p)
1091 if (! query (_("The target may not be able to correctly handle a %s\n"
1092 "of %ld bytes. Change the packet size? "),
1093 config->name, size))
1094 error (_("Packet size not changed."));
1096 /* Update the config. */
1097 config->fixed_p = fixed_p;
1098 config->size = size;
1102 show_memory_packet_size (struct memory_packet_config *config)
1104 printf_filtered (_("The %s is %ld. "), config->name, config->size);
1105 if (config->fixed_p)
1106 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1107 get_memory_packet_size (config));
1109 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1110 get_memory_packet_size (config));
1113 static struct memory_packet_config memory_write_packet_config =
1115 "memory-write-packet-size",
1119 set_memory_write_packet_size (char *args, int from_tty)
1121 set_memory_packet_size (args, &memory_write_packet_config);
1125 show_memory_write_packet_size (char *args, int from_tty)
1127 show_memory_packet_size (&memory_write_packet_config);
1131 get_memory_write_packet_size (void)
1133 return get_memory_packet_size (&memory_write_packet_config);
1136 static struct memory_packet_config memory_read_packet_config =
1138 "memory-read-packet-size",
1142 set_memory_read_packet_size (char *args, int from_tty)
1144 set_memory_packet_size (args, &memory_read_packet_config);
1148 show_memory_read_packet_size (char *args, int from_tty)
1150 show_memory_packet_size (&memory_read_packet_config);
1154 get_memory_read_packet_size (void)
1156 long size = get_memory_packet_size (&memory_read_packet_config);
1158 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1159 extra buffer size argument before the memory read size can be
1160 increased beyond this. */
1161 if (size > get_remote_packet_size ())
1162 size = get_remote_packet_size ();
1167 /* Generic configuration support for packets the stub optionally
1168 supports. Allows the user to specify the use of the packet as well
1169 as allowing GDB to auto-detect support in the remote stub. */
1173 PACKET_SUPPORT_UNKNOWN = 0,
1178 struct packet_config
1183 /* If auto, GDB auto-detects support for this packet or feature,
1184 either through qSupported, or by trying the packet and looking
1185 at the response. If true, GDB assumes the target supports this
1186 packet. If false, the packet is disabled. Configs that don't
1187 have an associated command always have this set to auto. */
1188 enum auto_boolean detect;
1190 /* Does the target support this packet? */
1191 enum packet_support support;
1194 /* Analyze a packet's return value and update the packet config
1204 static enum packet_support packet_config_support (struct packet_config *config);
1205 static enum packet_support packet_support (int packet);
1208 show_packet_config_cmd (struct packet_config *config)
1210 char *support = "internal-error";
1212 switch (packet_config_support (config))
1215 support = "enabled";
1217 case PACKET_DISABLE:
1218 support = "disabled";
1220 case PACKET_SUPPORT_UNKNOWN:
1221 support = "unknown";
1224 switch (config->detect)
1226 case AUTO_BOOLEAN_AUTO:
1227 printf_filtered (_("Support for the `%s' packet "
1228 "is auto-detected, currently %s.\n"),
1229 config->name, support);
1231 case AUTO_BOOLEAN_TRUE:
1232 case AUTO_BOOLEAN_FALSE:
1233 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1234 config->name, support);
1240 add_packet_config_cmd (struct packet_config *config, const char *name,
1241 const char *title, int legacy)
1247 config->name = name;
1248 config->title = title;
1249 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1251 show_doc = xstrprintf ("Show current use of remote "
1252 "protocol `%s' (%s) packet",
1254 /* set/show TITLE-packet {auto,on,off} */
1255 cmd_name = xstrprintf ("%s-packet", title);
1256 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
1257 &config->detect, set_doc,
1258 show_doc, NULL, /* help_doc */
1260 show_remote_protocol_packet_cmd,
1261 &remote_set_cmdlist, &remote_show_cmdlist);
1262 /* The command code copies the documentation strings. */
1265 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1270 legacy_name = xstrprintf ("%s-packet", name);
1271 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1272 &remote_set_cmdlist);
1273 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1274 &remote_show_cmdlist);
1278 static enum packet_result
1279 packet_check_result (const char *buf)
1283 /* The stub recognized the packet request. Check that the
1284 operation succeeded. */
1286 && isxdigit (buf[1]) && isxdigit (buf[2])
1288 /* "Enn" - definitly an error. */
1289 return PACKET_ERROR;
1291 /* Always treat "E." as an error. This will be used for
1292 more verbose error messages, such as E.memtypes. */
1293 if (buf[0] == 'E' && buf[1] == '.')
1294 return PACKET_ERROR;
1296 /* The packet may or may not be OK. Just assume it is. */
1300 /* The stub does not support the packet. */
1301 return PACKET_UNKNOWN;
1304 static enum packet_result
1305 packet_ok (const char *buf, struct packet_config *config)
1307 enum packet_result result;
1309 if (config->detect != AUTO_BOOLEAN_TRUE
1310 && config->support == PACKET_DISABLE)
1311 internal_error (__FILE__, __LINE__,
1312 _("packet_ok: attempt to use a disabled packet"));
1314 result = packet_check_result (buf);
1319 /* The stub recognized the packet request. */
1320 if (config->support == PACKET_SUPPORT_UNKNOWN)
1323 fprintf_unfiltered (gdb_stdlog,
1324 "Packet %s (%s) is supported\n",
1325 config->name, config->title);
1326 config->support = PACKET_ENABLE;
1329 case PACKET_UNKNOWN:
1330 /* The stub does not support the packet. */
1331 if (config->detect == AUTO_BOOLEAN_AUTO
1332 && config->support == PACKET_ENABLE)
1334 /* If the stub previously indicated that the packet was
1335 supported then there is a protocol error. */
1336 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1337 config->name, config->title);
1339 else if (config->detect == AUTO_BOOLEAN_TRUE)
1341 /* The user set it wrong. */
1342 error (_("Enabled packet %s (%s) not recognized by stub"),
1343 config->name, config->title);
1347 fprintf_unfiltered (gdb_stdlog,
1348 "Packet %s (%s) is NOT supported\n",
1349 config->name, config->title);
1350 config->support = PACKET_DISABLE;
1371 PACKET_vFile_pwrite,
1373 PACKET_vFile_unlink,
1374 PACKET_vFile_readlink,
1377 PACKET_qXfer_features,
1378 PACKET_qXfer_exec_file,
1379 PACKET_qXfer_libraries,
1380 PACKET_qXfer_libraries_svr4,
1381 PACKET_qXfer_memory_map,
1382 PACKET_qXfer_spu_read,
1383 PACKET_qXfer_spu_write,
1384 PACKET_qXfer_osdata,
1385 PACKET_qXfer_threads,
1386 PACKET_qXfer_statictrace_read,
1387 PACKET_qXfer_traceframe_info,
1393 PACKET_QPassSignals,
1394 PACKET_QCatchSyscalls,
1395 PACKET_QProgramSignals,
1397 PACKET_qSearch_memory,
1400 PACKET_QStartNoAckMode,
1402 PACKET_qXfer_siginfo_read,
1403 PACKET_qXfer_siginfo_write,
1406 /* Support for conditional tracepoints. */
1407 PACKET_ConditionalTracepoints,
1409 /* Support for target-side breakpoint conditions. */
1410 PACKET_ConditionalBreakpoints,
1412 /* Support for target-side breakpoint commands. */
1413 PACKET_BreakpointCommands,
1415 /* Support for fast tracepoints. */
1416 PACKET_FastTracepoints,
1418 /* Support for static tracepoints. */
1419 PACKET_StaticTracepoints,
1421 /* Support for installing tracepoints while a trace experiment is
1423 PACKET_InstallInTrace,
1427 PACKET_TracepointSource,
1430 PACKET_QDisableRandomization,
1432 PACKET_QTBuffer_size,
1436 PACKET_qXfer_btrace,
1438 /* Support for the QNonStop packet. */
1441 /* Support for the QThreadEvents packet. */
1442 PACKET_QThreadEvents,
1444 /* Support for multi-process extensions. */
1445 PACKET_multiprocess_feature,
1447 /* Support for enabling and disabling tracepoints while a trace
1448 experiment is running. */
1449 PACKET_EnableDisableTracepoints_feature,
1451 /* Support for collecting strings using the tracenz bytecode. */
1452 PACKET_tracenz_feature,
1454 /* Support for continuing to run a trace experiment while GDB is
1456 PACKET_DisconnectedTracing_feature,
1458 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1459 PACKET_augmented_libraries_svr4_read_feature,
1461 /* Support for the qXfer:btrace-conf:read packet. */
1462 PACKET_qXfer_btrace_conf,
1464 /* Support for the Qbtrace-conf:bts:size packet. */
1465 PACKET_Qbtrace_conf_bts_size,
1467 /* Support for swbreak+ feature. */
1468 PACKET_swbreak_feature,
1470 /* Support for hwbreak+ feature. */
1471 PACKET_hwbreak_feature,
1473 /* Support for fork events. */
1474 PACKET_fork_event_feature,
1476 /* Support for vfork events. */
1477 PACKET_vfork_event_feature,
1479 /* Support for the Qbtrace-conf:pt:size packet. */
1480 PACKET_Qbtrace_conf_pt_size,
1482 /* Support for exec events. */
1483 PACKET_exec_event_feature,
1485 /* Support for query supported vCont actions. */
1486 PACKET_vContSupported,
1488 /* Support remote CTRL-C. */
1491 /* Support TARGET_WAITKIND_NO_RESUMED. */
1497 static struct packet_config remote_protocol_packets[PACKET_MAX];
1499 /* Returns the packet's corresponding "set remote foo-packet" command
1500 state. See struct packet_config for more details. */
1502 static enum auto_boolean
1503 packet_set_cmd_state (int packet)
1505 return remote_protocol_packets[packet].detect;
1508 /* Returns whether a given packet or feature is supported. This takes
1509 into account the state of the corresponding "set remote foo-packet"
1510 command, which may be used to bypass auto-detection. */
1512 static enum packet_support
1513 packet_config_support (struct packet_config *config)
1515 switch (config->detect)
1517 case AUTO_BOOLEAN_TRUE:
1518 return PACKET_ENABLE;
1519 case AUTO_BOOLEAN_FALSE:
1520 return PACKET_DISABLE;
1521 case AUTO_BOOLEAN_AUTO:
1522 return config->support;
1524 gdb_assert_not_reached (_("bad switch"));
1528 /* Same as packet_config_support, but takes the packet's enum value as
1531 static enum packet_support
1532 packet_support (int packet)
1534 struct packet_config *config = &remote_protocol_packets[packet];
1536 return packet_config_support (config);
1540 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
1541 struct cmd_list_element *c,
1544 struct packet_config *packet;
1546 for (packet = remote_protocol_packets;
1547 packet < &remote_protocol_packets[PACKET_MAX];
1550 if (&packet->detect == c->var)
1552 show_packet_config_cmd (packet);
1556 internal_error (__FILE__, __LINE__, _("Could not find config for %s"),
1560 /* Should we try one of the 'Z' requests? */
1564 Z_PACKET_SOFTWARE_BP,
1565 Z_PACKET_HARDWARE_BP,
1572 /* For compatibility with older distributions. Provide a ``set remote
1573 Z-packet ...'' command that updates all the Z packet types. */
1575 static enum auto_boolean remote_Z_packet_detect;
1578 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
1579 struct cmd_list_element *c)
1583 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1584 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
1588 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
1589 struct cmd_list_element *c,
1594 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1596 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
1600 /* Returns true if the multi-process extensions are in effect. */
1603 remote_multi_process_p (struct remote_state *rs)
1605 return packet_support (PACKET_multiprocess_feature) == PACKET_ENABLE;
1608 /* Returns true if fork events are supported. */
1611 remote_fork_event_p (struct remote_state *rs)
1613 return packet_support (PACKET_fork_event_feature) == PACKET_ENABLE;
1616 /* Returns true if vfork events are supported. */
1619 remote_vfork_event_p (struct remote_state *rs)
1621 return packet_support (PACKET_vfork_event_feature) == PACKET_ENABLE;
1624 /* Returns true if exec events are supported. */
1627 remote_exec_event_p (struct remote_state *rs)
1629 return packet_support (PACKET_exec_event_feature) == PACKET_ENABLE;
1632 /* Insert fork catchpoint target routine. If fork events are enabled
1633 then return success, nothing more to do. */
1636 remote_insert_fork_catchpoint (struct target_ops *ops, int pid)
1638 struct remote_state *rs = get_remote_state ();
1640 return !remote_fork_event_p (rs);
1643 /* Remove fork catchpoint target routine. Nothing to do, just
1647 remote_remove_fork_catchpoint (struct target_ops *ops, int pid)
1652 /* Insert vfork catchpoint target routine. If vfork events are enabled
1653 then return success, nothing more to do. */
1656 remote_insert_vfork_catchpoint (struct target_ops *ops, int pid)
1658 struct remote_state *rs = get_remote_state ();
1660 return !remote_vfork_event_p (rs);
1663 /* Remove vfork catchpoint target routine. Nothing to do, just
1667 remote_remove_vfork_catchpoint (struct target_ops *ops, int pid)
1672 /* Insert exec catchpoint target routine. If exec events are
1673 enabled, just return success. */
1676 remote_insert_exec_catchpoint (struct target_ops *ops, int pid)
1678 struct remote_state *rs = get_remote_state ();
1680 return !remote_exec_event_p (rs);
1683 /* Remove exec catchpoint target routine. Nothing to do, just
1687 remote_remove_exec_catchpoint (struct target_ops *ops, int pid)
1692 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1693 static struct async_signal_handler *async_sigint_remote_twice_token;
1694 static struct async_signal_handler *async_sigint_remote_token;
1697 /* Asynchronous signal handle registered as event loop source for
1698 when we have pending events ready to be passed to the core. */
1700 static struct async_event_handler *remote_async_inferior_event_token;
1704 static ptid_t magic_null_ptid;
1705 static ptid_t not_sent_ptid;
1706 static ptid_t any_thread_ptid;
1708 /* Find out if the stub attached to PID (and hence GDB should offer to
1709 detach instead of killing it when bailing out). */
1712 remote_query_attached (int pid)
1714 struct remote_state *rs = get_remote_state ();
1715 size_t size = get_remote_packet_size ();
1717 if (packet_support (PACKET_qAttached) == PACKET_DISABLE)
1720 if (remote_multi_process_p (rs))
1721 xsnprintf (rs->buf, size, "qAttached:%x", pid);
1723 xsnprintf (rs->buf, size, "qAttached");
1726 getpkt (&rs->buf, &rs->buf_size, 0);
1728 switch (packet_ok (rs->buf,
1729 &remote_protocol_packets[PACKET_qAttached]))
1732 if (strcmp (rs->buf, "1") == 0)
1736 warning (_("Remote failure reply: %s"), rs->buf);
1738 case PACKET_UNKNOWN:
1745 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1746 has been invented by GDB, instead of reported by the target. Since
1747 we can be connected to a remote system before before knowing about
1748 any inferior, mark the target with execution when we find the first
1749 inferior. If ATTACHED is 1, then we had just attached to this
1750 inferior. If it is 0, then we just created this inferior. If it
1751 is -1, then try querying the remote stub to find out if it had
1752 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1753 attempt to open this inferior's executable as the main executable
1754 if no main executable is open already. */
1756 static struct inferior *
1757 remote_add_inferior (int fake_pid_p, int pid, int attached,
1760 struct inferior *inf;
1762 /* Check whether this process we're learning about is to be
1763 considered attached, or if is to be considered to have been
1764 spawned by the stub. */
1766 attached = remote_query_attached (pid);
1768 if (gdbarch_has_global_solist (target_gdbarch ()))
1770 /* If the target shares code across all inferiors, then every
1771 attach adds a new inferior. */
1772 inf = add_inferior (pid);
1774 /* ... and every inferior is bound to the same program space.
1775 However, each inferior may still have its own address
1777 inf->aspace = maybe_new_address_space ();
1778 inf->pspace = current_program_space;
1782 /* In the traditional debugging scenario, there's a 1-1 match
1783 between program/address spaces. We simply bind the inferior
1784 to the program space's address space. */
1785 inf = current_inferior ();
1786 inferior_appeared (inf, pid);
1789 inf->attach_flag = attached;
1790 inf->fake_pid_p = fake_pid_p;
1792 /* If no main executable is currently open then attempt to
1793 open the file that was executed to create this inferior. */
1794 if (try_open_exec && get_exec_file (0) == NULL)
1795 exec_file_locate_attach (pid, 1);
1800 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1801 according to RUNNING. */
1804 remote_add_thread (ptid_t ptid, int running, int executing)
1806 struct remote_state *rs = get_remote_state ();
1808 /* GDB historically didn't pull threads in the initial connection
1809 setup. If the remote target doesn't even have a concept of
1810 threads (e.g., a bare-metal target), even if internally we
1811 consider that a single-threaded target, mentioning a new thread
1812 might be confusing to the user. Be silent then, preserving the
1813 age old behavior. */
1814 if (rs->starting_up)
1815 add_thread_silent (ptid);
1819 set_executing (ptid, executing);
1820 set_running (ptid, running);
1823 /* Come here when we learn about a thread id from the remote target.
1824 It may be the first time we hear about such thread, so take the
1825 opportunity to add it to GDB's thread list. In case this is the
1826 first time we're noticing its corresponding inferior, add it to
1827 GDB's inferior list as well. EXECUTING indicates whether the
1828 thread is (internally) executing or stopped. */
1831 remote_notice_new_inferior (ptid_t currthread, int executing)
1833 /* In non-stop mode, we assume new found threads are (externally)
1834 running until proven otherwise with a stop reply. In all-stop,
1835 we can only get here if all threads are stopped. */
1836 int running = target_is_non_stop_p () ? 1 : 0;
1838 /* If this is a new thread, add it to GDB's thread list.
1839 If we leave it up to WFI to do this, bad things will happen. */
1841 if (in_thread_list (currthread) && is_exited (currthread))
1843 /* We're seeing an event on a thread id we knew had exited.
1844 This has to be a new thread reusing the old id. Add it. */
1845 remote_add_thread (currthread, running, executing);
1849 if (!in_thread_list (currthread))
1851 struct inferior *inf = NULL;
1852 int pid = ptid_get_pid (currthread);
1854 if (ptid_is_pid (inferior_ptid)
1855 && pid == ptid_get_pid (inferior_ptid))
1857 /* inferior_ptid has no thread member yet. This can happen
1858 with the vAttach -> remote_wait,"TAAthread:" path if the
1859 stub doesn't support qC. This is the first stop reported
1860 after an attach, so this is the main thread. Update the
1861 ptid in the thread list. */
1862 if (in_thread_list (pid_to_ptid (pid)))
1863 thread_change_ptid (inferior_ptid, currthread);
1866 remote_add_thread (currthread, running, executing);
1867 inferior_ptid = currthread;
1872 if (ptid_equal (magic_null_ptid, inferior_ptid))
1874 /* inferior_ptid is not set yet. This can happen with the
1875 vRun -> remote_wait,"TAAthread:" path if the stub
1876 doesn't support qC. This is the first stop reported
1877 after an attach, so this is the main thread. Update the
1878 ptid in the thread list. */
1879 thread_change_ptid (inferior_ptid, currthread);
1883 /* When connecting to a target remote, or to a target
1884 extended-remote which already was debugging an inferior, we
1885 may not know about it yet. Add it before adding its child
1886 thread, so notifications are emitted in a sensible order. */
1887 if (!in_inferior_list (ptid_get_pid (currthread)))
1889 struct remote_state *rs = get_remote_state ();
1890 int fake_pid_p = !remote_multi_process_p (rs);
1892 inf = remote_add_inferior (fake_pid_p,
1893 ptid_get_pid (currthread), -1, 1);
1896 /* This is really a new thread. Add it. */
1897 remote_add_thread (currthread, running, executing);
1899 /* If we found a new inferior, let the common code do whatever
1900 it needs to with it (e.g., read shared libraries, insert
1901 breakpoints), unless we're just setting up an all-stop
1905 struct remote_state *rs = get_remote_state ();
1907 if (!rs->starting_up)
1908 notice_new_inferior (currthread, executing, 0);
1913 /* Return the private thread data, creating it if necessary. */
1915 static struct private_thread_info *
1916 demand_private_info (ptid_t ptid)
1918 struct thread_info *info = find_thread_ptid (ptid);
1924 info->priv = XNEW (struct private_thread_info);
1925 info->private_dtor = free_private_thread_info;
1926 info->priv->core = -1;
1927 info->priv->extra = NULL;
1928 info->priv->name = NULL;
1934 /* Call this function as a result of
1935 1) A halt indication (T packet) containing a thread id
1936 2) A direct query of currthread
1937 3) Successful execution of set thread */
1940 record_currthread (struct remote_state *rs, ptid_t currthread)
1942 rs->general_thread = currthread;
1945 /* If 'QPassSignals' is supported, tell the remote stub what signals
1946 it can simply pass through to the inferior without reporting. */
1949 remote_pass_signals (struct target_ops *self,
1950 int numsigs, unsigned char *pass_signals)
1952 if (packet_support (PACKET_QPassSignals) != PACKET_DISABLE)
1954 char *pass_packet, *p;
1956 struct remote_state *rs = get_remote_state ();
1958 gdb_assert (numsigs < 256);
1959 for (i = 0; i < numsigs; i++)
1961 if (pass_signals[i])
1964 pass_packet = (char *) xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
1965 strcpy (pass_packet, "QPassSignals:");
1966 p = pass_packet + strlen (pass_packet);
1967 for (i = 0; i < numsigs; i++)
1969 if (pass_signals[i])
1972 *p++ = tohex (i >> 4);
1973 *p++ = tohex (i & 15);
1982 if (!rs->last_pass_packet || strcmp (rs->last_pass_packet, pass_packet))
1984 putpkt (pass_packet);
1985 getpkt (&rs->buf, &rs->buf_size, 0);
1986 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QPassSignals]);
1987 if (rs->last_pass_packet)
1988 xfree (rs->last_pass_packet);
1989 rs->last_pass_packet = pass_packet;
1992 xfree (pass_packet);
1996 /* If 'QCatchSyscalls' is supported, tell the remote stub
1997 to report syscalls to GDB. */
2000 remote_set_syscall_catchpoint (struct target_ops *self,
2001 int pid, int needed, int any_count,
2002 int table_size, int *table)
2005 enum packet_result result;
2008 if (packet_support (PACKET_QCatchSyscalls) == PACKET_DISABLE)
2010 /* Not supported. */
2014 if (needed && !any_count)
2018 /* Count how many syscalls are to be caught (table[sysno] != 0). */
2019 for (i = 0; i < table_size; i++)
2028 fprintf_unfiltered (gdb_stdlog,
2029 "remote_set_syscall_catchpoint "
2030 "pid %d needed %d any_count %d n_sysno %d\n",
2031 pid, needed, any_count, n_sysno);
2036 /* Prepare a packet with the sysno list, assuming max 8+1
2037 characters for a sysno. If the resulting packet size is too
2038 big, fallback on the non-selective packet. */
2039 const int maxpktsz = strlen ("QCatchSyscalls:1") + n_sysno * 9 + 1;
2041 catch_packet = (char *) xmalloc (maxpktsz);
2042 strcpy (catch_packet, "QCatchSyscalls:1");
2051 /* Add in catch_packet each syscall to be caught (table[i] != 0). */
2052 for (i = 0; i < table_size; i++)
2055 p += xsnprintf (p, catch_packet + maxpktsz - p, ";%x", i);
2058 if (strlen (catch_packet) > get_remote_packet_size ())
2060 /* catch_packet too big. Fallback to less efficient
2061 non selective mode, with GDB doing the filtering. */
2062 catch_packet[sizeof ("QCatchSyscalls:1") - 1] = 0;
2066 catch_packet = xstrdup ("QCatchSyscalls:0");
2069 struct cleanup *old_chain = make_cleanup (xfree, catch_packet);
2070 struct remote_state *rs = get_remote_state ();
2072 putpkt (catch_packet);
2073 getpkt (&rs->buf, &rs->buf_size, 0);
2074 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_QCatchSyscalls]);
2075 do_cleanups (old_chain);
2076 if (result == PACKET_OK)
2083 /* If 'QProgramSignals' is supported, tell the remote stub what
2084 signals it should pass through to the inferior when detaching. */
2087 remote_program_signals (struct target_ops *self,
2088 int numsigs, unsigned char *signals)
2090 if (packet_support (PACKET_QProgramSignals) != PACKET_DISABLE)
2094 struct remote_state *rs = get_remote_state ();
2096 gdb_assert (numsigs < 256);
2097 for (i = 0; i < numsigs; i++)
2102 packet = (char *) xmalloc (count * 3 + strlen ("QProgramSignals:") + 1);
2103 strcpy (packet, "QProgramSignals:");
2104 p = packet + strlen (packet);
2105 for (i = 0; i < numsigs; i++)
2107 if (signal_pass_state (i))
2110 *p++ = tohex (i >> 4);
2111 *p++ = tohex (i & 15);
2120 if (!rs->last_program_signals_packet
2121 || strcmp (rs->last_program_signals_packet, packet) != 0)
2124 getpkt (&rs->buf, &rs->buf_size, 0);
2125 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QProgramSignals]);
2126 xfree (rs->last_program_signals_packet);
2127 rs->last_program_signals_packet = packet;
2134 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2135 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2136 thread. If GEN is set, set the general thread, if not, then set
2137 the step/continue thread. */
2139 set_thread (struct ptid ptid, int gen)
2141 struct remote_state *rs = get_remote_state ();
2142 ptid_t state = gen ? rs->general_thread : rs->continue_thread;
2143 char *buf = rs->buf;
2144 char *endbuf = rs->buf + get_remote_packet_size ();
2146 if (ptid_equal (state, ptid))
2150 *buf++ = gen ? 'g' : 'c';
2151 if (ptid_equal (ptid, magic_null_ptid))
2152 xsnprintf (buf, endbuf - buf, "0");
2153 else if (ptid_equal (ptid, any_thread_ptid))
2154 xsnprintf (buf, endbuf - buf, "0");
2155 else if (ptid_equal (ptid, minus_one_ptid))
2156 xsnprintf (buf, endbuf - buf, "-1");
2158 write_ptid (buf, endbuf, ptid);
2160 getpkt (&rs->buf, &rs->buf_size, 0);
2162 rs->general_thread = ptid;
2164 rs->continue_thread = ptid;
2168 set_general_thread (struct ptid ptid)
2170 set_thread (ptid, 1);
2174 set_continue_thread (struct ptid ptid)
2176 set_thread (ptid, 0);
2179 /* Change the remote current process. Which thread within the process
2180 ends up selected isn't important, as long as it is the same process
2181 as what INFERIOR_PTID points to.
2183 This comes from that fact that there is no explicit notion of
2184 "selected process" in the protocol. The selected process for
2185 general operations is the process the selected general thread
2189 set_general_process (void)
2191 struct remote_state *rs = get_remote_state ();
2193 /* If the remote can't handle multiple processes, don't bother. */
2194 if (!remote_multi_process_p (rs))
2197 /* We only need to change the remote current thread if it's pointing
2198 at some other process. */
2199 if (ptid_get_pid (rs->general_thread) != ptid_get_pid (inferior_ptid))
2200 set_general_thread (inferior_ptid);
2204 /* Return nonzero if this is the main thread that we made up ourselves
2205 to model non-threaded targets as single-threaded. */
2208 remote_thread_always_alive (struct target_ops *ops, ptid_t ptid)
2210 if (ptid_equal (ptid, magic_null_ptid))
2211 /* The main thread is always alive. */
2214 if (ptid_get_pid (ptid) != 0 && ptid_get_lwp (ptid) == 0)
2215 /* The main thread is always alive. This can happen after a
2216 vAttach, if the remote side doesn't support
2223 /* Return nonzero if the thread PTID is still alive on the remote
2227 remote_thread_alive (struct target_ops *ops, ptid_t ptid)
2229 struct remote_state *rs = get_remote_state ();
2232 /* Check if this is a thread that we made up ourselves to model
2233 non-threaded targets as single-threaded. */
2234 if (remote_thread_always_alive (ops, ptid))
2238 endp = rs->buf + get_remote_packet_size ();
2241 write_ptid (p, endp, ptid);
2244 getpkt (&rs->buf, &rs->buf_size, 0);
2245 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
2248 /* Return a pointer to a thread name if we know it and NULL otherwise.
2249 The thread_info object owns the memory for the name. */
2252 remote_thread_name (struct target_ops *ops, struct thread_info *info)
2254 if (info->priv != NULL)
2255 return info->priv->name;
2260 /* About these extended threadlist and threadinfo packets. They are
2261 variable length packets but, the fields within them are often fixed
2262 length. They are redundent enough to send over UDP as is the
2263 remote protocol in general. There is a matching unit test module
2266 /* WARNING: This threadref data structure comes from the remote O.S.,
2267 libstub protocol encoding, and remote.c. It is not particularly
2270 /* Right now, the internal structure is int. We want it to be bigger.
2271 Plan to fix this. */
2273 typedef int gdb_threadref; /* Internal GDB thread reference. */
2275 /* gdb_ext_thread_info is an internal GDB data structure which is
2276 equivalent to the reply of the remote threadinfo packet. */
2278 struct gdb_ext_thread_info
2280 threadref threadid; /* External form of thread reference. */
2281 int active; /* Has state interesting to GDB?
2283 char display[256]; /* Brief state display, name,
2284 blocked/suspended. */
2285 char shortname[32]; /* To be used to name threads. */
2286 char more_display[256]; /* Long info, statistics, queue depth,
2290 /* The volume of remote transfers can be limited by submitting
2291 a mask containing bits specifying the desired information.
2292 Use a union of these values as the 'selection' parameter to
2293 get_thread_info. FIXME: Make these TAG names more thread specific. */
2295 #define TAG_THREADID 1
2296 #define TAG_EXISTS 2
2297 #define TAG_DISPLAY 4
2298 #define TAG_THREADNAME 8
2299 #define TAG_MOREDISPLAY 16
2301 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2303 static char *unpack_nibble (char *buf, int *val);
2305 static char *unpack_byte (char *buf, int *value);
2307 static char *pack_int (char *buf, int value);
2309 static char *unpack_int (char *buf, int *value);
2311 static char *unpack_string (char *src, char *dest, int length);
2313 static char *pack_threadid (char *pkt, threadref *id);
2315 static char *unpack_threadid (char *inbuf, threadref *id);
2317 void int_to_threadref (threadref *id, int value);
2319 static int threadref_to_int (threadref *ref);
2321 static void copy_threadref (threadref *dest, threadref *src);
2323 static int threadmatch (threadref *dest, threadref *src);
2325 static char *pack_threadinfo_request (char *pkt, int mode,
2328 static int remote_unpack_thread_info_response (char *pkt,
2329 threadref *expectedref,
2330 struct gdb_ext_thread_info
2334 static int remote_get_threadinfo (threadref *threadid,
2335 int fieldset, /*TAG mask */
2336 struct gdb_ext_thread_info *info);
2338 static char *pack_threadlist_request (char *pkt, int startflag,
2340 threadref *nextthread);
2342 static int parse_threadlist_response (char *pkt,
2344 threadref *original_echo,
2345 threadref *resultlist,
2348 static int remote_get_threadlist (int startflag,
2349 threadref *nextthread,
2353 threadref *threadlist);
2355 typedef int (*rmt_thread_action) (threadref *ref, void *context);
2357 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
2358 void *context, int looplimit);
2360 static int remote_newthread_step (threadref *ref, void *context);
2363 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2364 buffer we're allowed to write to. Returns
2365 BUF+CHARACTERS_WRITTEN. */
2368 write_ptid (char *buf, const char *endbuf, ptid_t ptid)
2371 struct remote_state *rs = get_remote_state ();
2373 if (remote_multi_process_p (rs))
2375 pid = ptid_get_pid (ptid);
2377 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
2379 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
2381 tid = ptid_get_lwp (ptid);
2383 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
2385 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
2390 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
2391 passed the last parsed char. Returns null_ptid on error. */
2394 read_ptid (char *buf, char **obuf)
2398 ULONGEST pid = 0, tid = 0;
2402 /* Multi-process ptid. */
2403 pp = unpack_varlen_hex (p + 1, &pid);
2405 error (_("invalid remote ptid: %s"), p);
2408 pp = unpack_varlen_hex (p + 1, &tid);
2411 return ptid_build (pid, tid, 0);
2414 /* No multi-process. Just a tid. */
2415 pp = unpack_varlen_hex (p, &tid);
2417 /* Return null_ptid when no thread id is found. */
2425 /* Since the stub is not sending a process id, then default to
2426 what's in inferior_ptid, unless it's null at this point. If so,
2427 then since there's no way to know the pid of the reported
2428 threads, use the magic number. */
2429 if (ptid_equal (inferior_ptid, null_ptid))
2430 pid = ptid_get_pid (magic_null_ptid);
2432 pid = ptid_get_pid (inferior_ptid);
2436 return ptid_build (pid, tid, 0);
2442 if (ch >= 'a' && ch <= 'f')
2443 return ch - 'a' + 10;
2444 if (ch >= '0' && ch <= '9')
2446 if (ch >= 'A' && ch <= 'F')
2447 return ch - 'A' + 10;
2452 stub_unpack_int (char *buff, int fieldlength)
2459 nibble = stubhex (*buff++);
2463 retval = retval << 4;
2469 unpack_nibble (char *buf, int *val)
2471 *val = fromhex (*buf++);
2476 unpack_byte (char *buf, int *value)
2478 *value = stub_unpack_int (buf, 2);
2483 pack_int (char *buf, int value)
2485 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
2486 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
2487 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
2488 buf = pack_hex_byte (buf, (value & 0xff));
2493 unpack_int (char *buf, int *value)
2495 *value = stub_unpack_int (buf, 8);
2499 #if 0 /* Currently unused, uncomment when needed. */
2500 static char *pack_string (char *pkt, char *string);
2503 pack_string (char *pkt, char *string)
2508 len = strlen (string);
2510 len = 200; /* Bigger than most GDB packets, junk??? */
2511 pkt = pack_hex_byte (pkt, len);
2515 if ((ch == '\0') || (ch == '#'))
2516 ch = '*'; /* Protect encapsulation. */
2521 #endif /* 0 (unused) */
2524 unpack_string (char *src, char *dest, int length)
2533 pack_threadid (char *pkt, threadref *id)
2536 unsigned char *altid;
2538 altid = (unsigned char *) id;
2539 limit = pkt + BUF_THREAD_ID_SIZE;
2541 pkt = pack_hex_byte (pkt, *altid++);
2547 unpack_threadid (char *inbuf, threadref *id)
2550 char *limit = inbuf + BUF_THREAD_ID_SIZE;
2553 altref = (char *) id;
2555 while (inbuf < limit)
2557 x = stubhex (*inbuf++);
2558 y = stubhex (*inbuf++);
2559 *altref++ = (x << 4) | y;
2564 /* Externally, threadrefs are 64 bits but internally, they are still
2565 ints. This is due to a mismatch of specifications. We would like
2566 to use 64bit thread references internally. This is an adapter
2570 int_to_threadref (threadref *id, int value)
2572 unsigned char *scan;
2574 scan = (unsigned char *) id;
2580 *scan++ = (value >> 24) & 0xff;
2581 *scan++ = (value >> 16) & 0xff;
2582 *scan++ = (value >> 8) & 0xff;
2583 *scan++ = (value & 0xff);
2587 threadref_to_int (threadref *ref)
2590 unsigned char *scan;
2596 value = (value << 8) | ((*scan++) & 0xff);
2601 copy_threadref (threadref *dest, threadref *src)
2604 unsigned char *csrc, *cdest;
2606 csrc = (unsigned char *) src;
2607 cdest = (unsigned char *) dest;
2614 threadmatch (threadref *dest, threadref *src)
2616 /* Things are broken right now, so just assume we got a match. */
2618 unsigned char *srcp, *destp;
2620 srcp = (char *) src;
2621 destp = (char *) dest;
2625 result &= (*srcp++ == *destp++) ? 1 : 0;
2632 threadid:1, # always request threadid
2639 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2642 pack_threadinfo_request (char *pkt, int mode, threadref *id)
2644 *pkt++ = 'q'; /* Info Query */
2645 *pkt++ = 'P'; /* process or thread info */
2646 pkt = pack_int (pkt, mode); /* mode */
2647 pkt = pack_threadid (pkt, id); /* threadid */
2648 *pkt = '\0'; /* terminate */
2652 /* These values tag the fields in a thread info response packet. */
2653 /* Tagging the fields allows us to request specific fields and to
2654 add more fields as time goes by. */
2656 #define TAG_THREADID 1 /* Echo the thread identifier. */
2657 #define TAG_EXISTS 2 /* Is this process defined enough to
2658 fetch registers and its stack? */
2659 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2660 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2661 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2665 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
2666 struct gdb_ext_thread_info *info)
2668 struct remote_state *rs = get_remote_state ();
2672 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
2675 /* info->threadid = 0; FIXME: implement zero_threadref. */
2677 info->display[0] = '\0';
2678 info->shortname[0] = '\0';
2679 info->more_display[0] = '\0';
2681 /* Assume the characters indicating the packet type have been
2683 pkt = unpack_int (pkt, &mask); /* arg mask */
2684 pkt = unpack_threadid (pkt, &ref);
2687 warning (_("Incomplete response to threadinfo request."));
2688 if (!threadmatch (&ref, expectedref))
2689 { /* This is an answer to a different request. */
2690 warning (_("ERROR RMT Thread info mismatch."));
2693 copy_threadref (&info->threadid, &ref);
2695 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2697 /* Packets are terminated with nulls. */
2698 while ((pkt < limit) && mask && *pkt)
2700 pkt = unpack_int (pkt, &tag); /* tag */
2701 pkt = unpack_byte (pkt, &length); /* length */
2702 if (!(tag & mask)) /* Tags out of synch with mask. */
2704 warning (_("ERROR RMT: threadinfo tag mismatch."));
2708 if (tag == TAG_THREADID)
2712 warning (_("ERROR RMT: length of threadid is not 16."));
2716 pkt = unpack_threadid (pkt, &ref);
2717 mask = mask & ~TAG_THREADID;
2720 if (tag == TAG_EXISTS)
2722 info->active = stub_unpack_int (pkt, length);
2724 mask = mask & ~(TAG_EXISTS);
2727 warning (_("ERROR RMT: 'exists' length too long."));
2733 if (tag == TAG_THREADNAME)
2735 pkt = unpack_string (pkt, &info->shortname[0], length);
2736 mask = mask & ~TAG_THREADNAME;
2739 if (tag == TAG_DISPLAY)
2741 pkt = unpack_string (pkt, &info->display[0], length);
2742 mask = mask & ~TAG_DISPLAY;
2745 if (tag == TAG_MOREDISPLAY)
2747 pkt = unpack_string (pkt, &info->more_display[0], length);
2748 mask = mask & ~TAG_MOREDISPLAY;
2751 warning (_("ERROR RMT: unknown thread info tag."));
2752 break; /* Not a tag we know about. */
2758 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
2759 struct gdb_ext_thread_info *info)
2761 struct remote_state *rs = get_remote_state ();
2764 pack_threadinfo_request (rs->buf, fieldset, threadid);
2766 getpkt (&rs->buf, &rs->buf_size, 0);
2768 if (rs->buf[0] == '\0')
2771 result = remote_unpack_thread_info_response (rs->buf + 2,
2776 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2779 pack_threadlist_request (char *pkt, int startflag, int threadcount,
2780 threadref *nextthread)
2782 *pkt++ = 'q'; /* info query packet */
2783 *pkt++ = 'L'; /* Process LIST or threadLIST request */
2784 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
2785 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
2786 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
2791 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2794 parse_threadlist_response (char *pkt, int result_limit,
2795 threadref *original_echo, threadref *resultlist,
2798 struct remote_state *rs = get_remote_state ();
2800 int count, resultcount, done;
2803 /* Assume the 'q' and 'M chars have been stripped. */
2804 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
2805 /* done parse past here */
2806 pkt = unpack_byte (pkt, &count); /* count field */
2807 pkt = unpack_nibble (pkt, &done);
2808 /* The first threadid is the argument threadid. */
2809 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
2810 while ((count-- > 0) && (pkt < limit))
2812 pkt = unpack_threadid (pkt, resultlist++);
2813 if (resultcount++ >= result_limit)
2821 /* Fetch the next batch of threads from the remote. Returns -1 if the
2822 qL packet is not supported, 0 on error and 1 on success. */
2825 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
2826 int *done, int *result_count, threadref *threadlist)
2828 struct remote_state *rs = get_remote_state ();
2831 /* Trancate result limit to be smaller than the packet size. */
2832 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10)
2833 >= get_remote_packet_size ())
2834 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
2836 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
2838 getpkt (&rs->buf, &rs->buf_size, 0);
2839 if (*rs->buf == '\0')
2841 /* Packet not supported. */
2846 parse_threadlist_response (rs->buf + 2, result_limit,
2847 &rs->echo_nextthread, threadlist, done);
2849 if (!threadmatch (&rs->echo_nextthread, nextthread))
2851 /* FIXME: This is a good reason to drop the packet. */
2852 /* Possably, there is a duplicate response. */
2854 retransmit immediatly - race conditions
2855 retransmit after timeout - yes
2857 wait for packet, then exit
2859 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2860 return 0; /* I choose simply exiting. */
2862 if (*result_count <= 0)
2866 warning (_("RMT ERROR : failed to get remote thread list."));
2869 return result; /* break; */
2871 if (*result_count > result_limit)
2874 warning (_("RMT ERROR: threadlist response longer than requested."));
2880 /* Fetch the list of remote threads, with the qL packet, and call
2881 STEPFUNCTION for each thread found. Stops iterating and returns 1
2882 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2883 STEPFUNCTION returns false. If the packet is not supported,
2887 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
2890 struct remote_state *rs = get_remote_state ();
2891 int done, i, result_count;
2899 if (loopcount++ > looplimit)
2902 warning (_("Remote fetch threadlist -infinite loop-."));
2905 result = remote_get_threadlist (startflag, &rs->nextthread,
2906 MAXTHREADLISTRESULTS,
2907 &done, &result_count,
2908 rs->resultthreadlist);
2911 /* Clear for later iterations. */
2913 /* Setup to resume next batch of thread references, set nextthread. */
2914 if (result_count >= 1)
2915 copy_threadref (&rs->nextthread,
2916 &rs->resultthreadlist[result_count - 1]);
2918 while (result_count--)
2920 if (!(*stepfunction) (&rs->resultthreadlist[i++], context))
2930 /* A thread found on the remote target. */
2932 typedef struct thread_item
2934 /* The thread's PTID. */
2937 /* The thread's extra info. May be NULL. */
2940 /* The thread's name. May be NULL. */
2943 /* The core the thread was running on. -1 if not known. */
2946 DEF_VEC_O(thread_item_t);
2948 /* Context passed around to the various methods listing remote
2949 threads. As new threads are found, they're added to the ITEMS
2952 struct threads_listing_context
2954 /* The threads found on the remote target. */
2955 VEC (thread_item_t) *items;
2958 /* Discard the contents of the constructed thread listing context. */
2961 clear_threads_listing_context (void *p)
2963 struct threads_listing_context *context
2964 = (struct threads_listing_context *) p;
2966 struct thread_item *item;
2968 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
2970 xfree (item->extra);
2974 VEC_free (thread_item_t, context->items);
2977 /* Remove the thread specified as the related_pid field of WS
2978 from the CONTEXT list. */
2981 threads_listing_context_remove (struct target_waitstatus *ws,
2982 struct threads_listing_context *context)
2984 struct thread_item *item;
2986 ptid_t child_ptid = ws->value.related_pid;
2988 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
2990 if (ptid_equal (item->ptid, child_ptid))
2992 VEC_ordered_remove (thread_item_t, context->items, i);
2999 remote_newthread_step (threadref *ref, void *data)
3001 struct threads_listing_context *context
3002 = (struct threads_listing_context *) data;
3003 struct thread_item item;
3004 int pid = ptid_get_pid (inferior_ptid);
3006 item.ptid = ptid_build (pid, threadref_to_int (ref), 0);
3011 VEC_safe_push (thread_item_t, context->items, &item);
3013 return 1; /* continue iterator */
3016 #define CRAZY_MAX_THREADS 1000
3019 remote_current_thread (ptid_t oldpid)
3021 struct remote_state *rs = get_remote_state ();
3024 getpkt (&rs->buf, &rs->buf_size, 0);
3025 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
3030 result = read_ptid (&rs->buf[2], &obuf);
3031 if (*obuf != '\0' && remote_debug)
3032 fprintf_unfiltered (gdb_stdlog,
3033 "warning: garbage in qC reply\n");
3041 /* List remote threads using the deprecated qL packet. */
3044 remote_get_threads_with_ql (struct target_ops *ops,
3045 struct threads_listing_context *context)
3047 if (remote_threadlist_iterator (remote_newthread_step, context,
3048 CRAZY_MAX_THREADS) >= 0)
3054 #if defined(HAVE_LIBEXPAT)
3057 start_thread (struct gdb_xml_parser *parser,
3058 const struct gdb_xml_element *element,
3059 void *user_data, VEC(gdb_xml_value_s) *attributes)
3061 struct threads_listing_context *data
3062 = (struct threads_listing_context *) user_data;
3064 struct thread_item item;
3066 struct gdb_xml_value *attr;
3068 id = (char *) xml_find_attribute (attributes, "id")->value;
3069 item.ptid = read_ptid (id, NULL);
3071 attr = xml_find_attribute (attributes, "core");
3073 item.core = *(ULONGEST *) attr->value;
3077 attr = xml_find_attribute (attributes, "name");
3078 item.name = attr != NULL ? xstrdup ((const char *) attr->value) : NULL;
3082 VEC_safe_push (thread_item_t, data->items, &item);
3086 end_thread (struct gdb_xml_parser *parser,
3087 const struct gdb_xml_element *element,
3088 void *user_data, const char *body_text)
3090 struct threads_listing_context *data
3091 = (struct threads_listing_context *) user_data;
3093 if (body_text && *body_text)
3094 VEC_last (thread_item_t, data->items)->extra = xstrdup (body_text);
3097 const struct gdb_xml_attribute thread_attributes[] = {
3098 { "id", GDB_XML_AF_NONE, NULL, NULL },
3099 { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
3100 { "name", GDB_XML_AF_OPTIONAL, NULL, NULL },
3101 { NULL, GDB_XML_AF_NONE, NULL, NULL }
3104 const struct gdb_xml_element thread_children[] = {
3105 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3108 const struct gdb_xml_element threads_children[] = {
3109 { "thread", thread_attributes, thread_children,
3110 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
3111 start_thread, end_thread },
3112 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3115 const struct gdb_xml_element threads_elements[] = {
3116 { "threads", NULL, threads_children,
3117 GDB_XML_EF_NONE, NULL, NULL },
3118 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3123 /* List remote threads using qXfer:threads:read. */
3126 remote_get_threads_with_qxfer (struct target_ops *ops,
3127 struct threads_listing_context *context)
3129 #if defined(HAVE_LIBEXPAT)
3130 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3132 char *xml = target_read_stralloc (ops, TARGET_OBJECT_THREADS, NULL);
3133 struct cleanup *back_to = make_cleanup (xfree, xml);
3135 if (xml != NULL && *xml != '\0')
3137 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3138 threads_elements, xml, context);
3141 do_cleanups (back_to);
3149 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3152 remote_get_threads_with_qthreadinfo (struct target_ops *ops,
3153 struct threads_listing_context *context)
3155 struct remote_state *rs = get_remote_state ();
3157 if (rs->use_threadinfo_query)
3161 putpkt ("qfThreadInfo");
3162 getpkt (&rs->buf, &rs->buf_size, 0);
3164 if (bufp[0] != '\0') /* q packet recognized */
3166 while (*bufp++ == 'm') /* reply contains one or more TID */
3170 struct thread_item item;
3172 item.ptid = read_ptid (bufp, &bufp);
3177 VEC_safe_push (thread_item_t, context->items, &item);
3179 while (*bufp++ == ','); /* comma-separated list */
3180 putpkt ("qsThreadInfo");
3181 getpkt (&rs->buf, &rs->buf_size, 0);
3188 /* Packet not recognized. */
3189 rs->use_threadinfo_query = 0;
3196 /* Implement the to_update_thread_list function for the remote
3200 remote_update_thread_list (struct target_ops *ops)
3202 struct threads_listing_context context;
3203 struct cleanup *old_chain;
3206 context.items = NULL;
3207 old_chain = make_cleanup (clear_threads_listing_context, &context);
3209 /* We have a few different mechanisms to fetch the thread list. Try
3210 them all, starting with the most preferred one first, falling
3211 back to older methods. */
3212 if (remote_get_threads_with_qxfer (ops, &context)
3213 || remote_get_threads_with_qthreadinfo (ops, &context)
3214 || remote_get_threads_with_ql (ops, &context))
3217 struct thread_item *item;
3218 struct thread_info *tp, *tmp;
3222 if (VEC_empty (thread_item_t, context.items)
3223 && remote_thread_always_alive (ops, inferior_ptid))
3225 /* Some targets don't really support threads, but still
3226 reply an (empty) thread list in response to the thread
3227 listing packets, instead of replying "packet not
3228 supported". Exit early so we don't delete the main
3230 do_cleanups (old_chain);
3234 /* CONTEXT now holds the current thread list on the remote
3235 target end. Delete GDB-side threads no longer found on the
3237 ALL_THREADS_SAFE (tp, tmp)
3240 VEC_iterate (thread_item_t, context.items, i, item);
3243 if (ptid_equal (item->ptid, tp->ptid))
3247 if (i == VEC_length (thread_item_t, context.items))
3250 delete_thread (tp->ptid);
3254 /* Remove any unreported fork child threads from CONTEXT so
3255 that we don't interfere with follow fork, which is where
3256 creation of such threads is handled. */
3257 remove_new_fork_children (&context);
3259 /* And now add threads we don't know about yet to our list. */
3261 VEC_iterate (thread_item_t, context.items, i, item);
3264 if (!ptid_equal (item->ptid, null_ptid))
3266 struct private_thread_info *info;
3267 /* In non-stop mode, we assume new found threads are
3268 executing until proven otherwise with a stop reply.
3269 In all-stop, we can only get here if all threads are
3271 int executing = target_is_non_stop_p () ? 1 : 0;
3273 remote_notice_new_inferior (item->ptid, executing);
3275 info = demand_private_info (item->ptid);
3276 info->core = item->core;
3277 info->extra = item->extra;
3279 info->name = item->name;
3287 /* If no thread listing method is supported, then query whether
3288 each known thread is alive, one by one, with the T packet.
3289 If the target doesn't support threads at all, then this is a
3290 no-op. See remote_thread_alive. */
3294 do_cleanups (old_chain);
3298 * Collect a descriptive string about the given thread.
3299 * The target may say anything it wants to about the thread
3300 * (typically info about its blocked / runnable state, name, etc.).
3301 * This string will appear in the info threads display.
3303 * Optional: targets are not required to implement this function.
3307 remote_threads_extra_info (struct target_ops *self, struct thread_info *tp)
3309 struct remote_state *rs = get_remote_state ();
3313 struct gdb_ext_thread_info threadinfo;
3314 static char display_buf[100]; /* arbitrary... */
3315 int n = 0; /* position in display_buf */
3317 if (rs->remote_desc == 0) /* paranoia */
3318 internal_error (__FILE__, __LINE__,
3319 _("remote_threads_extra_info"));
3321 if (ptid_equal (tp->ptid, magic_null_ptid)
3322 || (ptid_get_pid (tp->ptid) != 0 && ptid_get_lwp (tp->ptid) == 0))
3323 /* This is the main thread which was added by GDB. The remote
3324 server doesn't know about it. */
3327 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3329 struct thread_info *info = find_thread_ptid (tp->ptid);
3331 if (info && info->priv)
3332 return info->priv->extra;
3337 if (rs->use_threadextra_query)
3340 char *endb = rs->buf + get_remote_packet_size ();
3342 xsnprintf (b, endb - b, "qThreadExtraInfo,");
3344 write_ptid (b, endb, tp->ptid);
3347 getpkt (&rs->buf, &rs->buf_size, 0);
3348 if (rs->buf[0] != 0)
3350 n = min (strlen (rs->buf) / 2, sizeof (display_buf));
3351 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
3352 display_buf [result] = '\0';
3357 /* If the above query fails, fall back to the old method. */
3358 rs->use_threadextra_query = 0;
3359 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
3360 | TAG_MOREDISPLAY | TAG_DISPLAY;
3361 int_to_threadref (&id, ptid_get_lwp (tp->ptid));
3362 if (remote_get_threadinfo (&id, set, &threadinfo))
3363 if (threadinfo.active)
3365 if (*threadinfo.shortname)
3366 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
3367 " Name: %s,", threadinfo.shortname);
3368 if (*threadinfo.display)
3369 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
3370 " State: %s,", threadinfo.display);
3371 if (*threadinfo.more_display)
3372 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
3373 " Priority: %s", threadinfo.more_display);
3377 /* For purely cosmetic reasons, clear up trailing commas. */
3378 if (',' == display_buf[n-1])
3379 display_buf[n-1] = ' ';
3388 remote_static_tracepoint_marker_at (struct target_ops *self, CORE_ADDR addr,
3389 struct static_tracepoint_marker *marker)
3391 struct remote_state *rs = get_remote_state ();
3394 xsnprintf (p, get_remote_packet_size (), "qTSTMat:");
3396 p += hexnumstr (p, addr);
3398 getpkt (&rs->buf, &rs->buf_size, 0);
3402 error (_("Remote failure reply: %s"), p);
3406 parse_static_tracepoint_marker_definition (p, &p, marker);
3413 static VEC(static_tracepoint_marker_p) *
3414 remote_static_tracepoint_markers_by_strid (struct target_ops *self,
3417 struct remote_state *rs = get_remote_state ();
3418 VEC(static_tracepoint_marker_p) *markers = NULL;
3419 struct static_tracepoint_marker *marker = NULL;
3420 struct cleanup *old_chain;
3423 /* Ask for a first packet of static tracepoint marker
3426 getpkt (&rs->buf, &rs->buf_size, 0);
3429 error (_("Remote failure reply: %s"), p);
3431 old_chain = make_cleanup (free_current_marker, &marker);
3436 marker = XCNEW (struct static_tracepoint_marker);
3440 parse_static_tracepoint_marker_definition (p, &p, marker);
3442 if (strid == NULL || strcmp (strid, marker->str_id) == 0)
3444 VEC_safe_push (static_tracepoint_marker_p,
3450 release_static_tracepoint_marker (marker);
3451 memset (marker, 0, sizeof (*marker));
3454 while (*p++ == ','); /* comma-separated list */
3455 /* Ask for another packet of static tracepoint definition. */
3457 getpkt (&rs->buf, &rs->buf_size, 0);
3461 do_cleanups (old_chain);
3466 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3469 remote_get_ada_task_ptid (struct target_ops *self, long lwp, long thread)
3471 return ptid_build (ptid_get_pid (inferior_ptid), lwp, 0);
3475 /* Restart the remote side; this is an extended protocol operation. */
3478 extended_remote_restart (void)
3480 struct remote_state *rs = get_remote_state ();
3482 /* Send the restart command; for reasons I don't understand the
3483 remote side really expects a number after the "R". */
3484 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
3487 remote_fileio_reset ();
3490 /* Clean up connection to a remote debugger. */
3493 remote_close (struct target_ops *self)
3495 struct remote_state *rs = get_remote_state ();
3497 if (rs->remote_desc == NULL)
3498 return; /* already closed */
3500 /* Make sure we leave stdin registered in the event loop, and we
3501 don't leave the async SIGINT signal handler installed. */
3502 remote_terminal_ours (self);
3504 serial_close (rs->remote_desc);
3505 rs->remote_desc = NULL;
3507 /* We don't have a connection to the remote stub anymore. Get rid
3508 of all the inferiors and their threads we were controlling.
3509 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3510 will be unable to find the thread corresponding to (pid, 0, 0). */
3511 inferior_ptid = null_ptid;
3512 discard_all_inferiors ();
3514 /* We are closing the remote target, so we should discard
3515 everything of this target. */
3516 discard_pending_stop_replies_in_queue (rs);
3518 if (remote_async_inferior_event_token)
3519 delete_async_event_handler (&remote_async_inferior_event_token);
3521 remote_notif_state_xfree (rs->notif_state);
3523 trace_reset_local_state ();
3526 /* Query the remote side for the text, data and bss offsets. */
3531 struct remote_state *rs = get_remote_state ();
3534 int lose, num_segments = 0, do_sections, do_segments;
3535 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
3536 struct section_offsets *offs;
3537 struct symfile_segment_data *data;
3539 if (symfile_objfile == NULL)
3542 putpkt ("qOffsets");
3543 getpkt (&rs->buf, &rs->buf_size, 0);
3546 if (buf[0] == '\000')
3547 return; /* Return silently. Stub doesn't support
3551 warning (_("Remote failure reply: %s"), buf);
3555 /* Pick up each field in turn. This used to be done with scanf, but
3556 scanf will make trouble if CORE_ADDR size doesn't match
3557 conversion directives correctly. The following code will work
3558 with any size of CORE_ADDR. */
3559 text_addr = data_addr = bss_addr = 0;
3563 if (startswith (ptr, "Text="))
3566 /* Don't use strtol, could lose on big values. */
3567 while (*ptr && *ptr != ';')
3568 text_addr = (text_addr << 4) + fromhex (*ptr++);
3570 if (startswith (ptr, ";Data="))
3573 while (*ptr && *ptr != ';')
3574 data_addr = (data_addr << 4) + fromhex (*ptr++);
3579 if (!lose && startswith (ptr, ";Bss="))
3582 while (*ptr && *ptr != ';')
3583 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
3585 if (bss_addr != data_addr)
3586 warning (_("Target reported unsupported offsets: %s"), buf);
3591 else if (startswith (ptr, "TextSeg="))
3594 /* Don't use strtol, could lose on big values. */
3595 while (*ptr && *ptr != ';')
3596 text_addr = (text_addr << 4) + fromhex (*ptr++);
3599 if (startswith (ptr, ";DataSeg="))
3602 while (*ptr && *ptr != ';')
3603 data_addr = (data_addr << 4) + fromhex (*ptr++);
3611 error (_("Malformed response to offset query, %s"), buf);
3612 else if (*ptr != '\0')
3613 warning (_("Target reported unsupported offsets: %s"), buf);
3615 offs = ((struct section_offsets *)
3616 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
3617 memcpy (offs, symfile_objfile->section_offsets,
3618 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
3620 data = get_symfile_segment_data (symfile_objfile->obfd);
3621 do_segments = (data != NULL);
3622 do_sections = num_segments == 0;
3624 if (num_segments > 0)
3626 segments[0] = text_addr;
3627 segments[1] = data_addr;
3629 /* If we have two segments, we can still try to relocate everything
3630 by assuming that the .text and .data offsets apply to the whole
3631 text and data segments. Convert the offsets given in the packet
3632 to base addresses for symfile_map_offsets_to_segments. */
3633 else if (data && data->num_segments == 2)
3635 segments[0] = data->segment_bases[0] + text_addr;
3636 segments[1] = data->segment_bases[1] + data_addr;
3639 /* If the object file has only one segment, assume that it is text
3640 rather than data; main programs with no writable data are rare,
3641 but programs with no code are useless. Of course the code might
3642 have ended up in the data segment... to detect that we would need
3643 the permissions here. */
3644 else if (data && data->num_segments == 1)
3646 segments[0] = data->segment_bases[0] + text_addr;
3649 /* There's no way to relocate by segment. */
3655 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
3656 offs, num_segments, segments);
3658 if (ret == 0 && !do_sections)
3659 error (_("Can not handle qOffsets TextSeg "
3660 "response with this symbol file"));
3667 free_symfile_segment_data (data);
3671 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
3673 /* This is a temporary kludge to force data and bss to use the
3674 same offsets because that's what nlmconv does now. The real
3675 solution requires changes to the stub and remote.c that I
3676 don't have time to do right now. */
3678 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
3679 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
3682 objfile_relocate (symfile_objfile, offs);
3685 /* Send interrupt_sequence to remote target. */
3687 send_interrupt_sequence (void)
3689 struct remote_state *rs = get_remote_state ();
3691 if (interrupt_sequence_mode == interrupt_sequence_control_c)
3692 remote_serial_write ("\x03", 1);
3693 else if (interrupt_sequence_mode == interrupt_sequence_break)
3694 serial_send_break (rs->remote_desc);
3695 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
3697 serial_send_break (rs->remote_desc);
3698 remote_serial_write ("g", 1);
3701 internal_error (__FILE__, __LINE__,
3702 _("Invalid value for interrupt_sequence_mode: %s."),
3703 interrupt_sequence_mode);
3707 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3708 and extract the PTID. Returns NULL_PTID if not found. */
3711 stop_reply_extract_thread (char *stop_reply)
3713 if (stop_reply[0] == 'T' && strlen (stop_reply) > 3)
3717 /* Txx r:val ; r:val (...) */
3720 /* Look for "register" named "thread". */
3725 p1 = strchr (p, ':');
3729 if (strncmp (p, "thread", p1 - p) == 0)
3730 return read_ptid (++p1, &p);
3732 p1 = strchr (p, ';');
3744 /* Determine the remote side's current thread. If we have a stop
3745 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3746 "thread" register we can extract the current thread from. If not,
3747 ask the remote which is the current thread with qC. The former
3748 method avoids a roundtrip. */
3751 get_current_thread (char *wait_status)
3753 ptid_t ptid = null_ptid;
3755 /* Note we don't use remote_parse_stop_reply as that makes use of
3756 the target architecture, which we haven't yet fully determined at
3758 if (wait_status != NULL)
3759 ptid = stop_reply_extract_thread (wait_status);
3760 if (ptid_equal (ptid, null_ptid))
3761 ptid = remote_current_thread (inferior_ptid);
3766 /* Query the remote target for which is the current thread/process,
3767 add it to our tables, and update INFERIOR_PTID. The caller is
3768 responsible for setting the state such that the remote end is ready
3769 to return the current thread.
3771 This function is called after handling the '?' or 'vRun' packets,
3772 whose response is a stop reply from which we can also try
3773 extracting the thread. If the target doesn't support the explicit
3774 qC query, we infer the current thread from that stop reply, passed
3775 in in WAIT_STATUS, which may be NULL. */
3778 add_current_inferior_and_thread (char *wait_status)
3780 struct remote_state *rs = get_remote_state ();
3784 inferior_ptid = null_ptid;
3786 /* Now, if we have thread information, update inferior_ptid. */
3787 ptid = get_current_thread (wait_status);
3789 if (!ptid_equal (ptid, null_ptid))
3791 if (!remote_multi_process_p (rs))
3794 inferior_ptid = ptid;
3798 /* Without this, some commands which require an active target
3799 (such as kill) won't work. This variable serves (at least)
3800 double duty as both the pid of the target process (if it has
3801 such), and as a flag indicating that a target is active. */
3802 inferior_ptid = magic_null_ptid;
3806 remote_add_inferior (fake_pid_p, ptid_get_pid (inferior_ptid), -1, 1);
3808 /* Add the main thread. */
3809 add_thread_silent (inferior_ptid);
3812 /* Print info about a thread that was found already stopped on
3816 print_one_stopped_thread (struct thread_info *thread)
3818 struct target_waitstatus *ws = &thread->suspend.waitstatus;
3820 switch_to_thread (thread->ptid);
3821 stop_pc = get_frame_pc (get_current_frame ());
3822 set_current_sal_from_frame (get_current_frame ());
3824 thread->suspend.waitstatus_pending_p = 0;
3826 if (ws->kind == TARGET_WAITKIND_STOPPED)
3828 enum gdb_signal sig = ws->value.sig;
3830 if (signal_print_state (sig))
3831 observer_notify_signal_received (sig);
3833 observer_notify_normal_stop (NULL, 1);
3836 /* Process all initial stop replies the remote side sent in response
3837 to the ? packet. These indicate threads that were already stopped
3838 on initial connection. We mark these threads as stopped and print
3839 their current frame before giving the user the prompt. */
3842 process_initial_stop_replies (int from_tty)
3844 int pending_stop_replies = stop_reply_queue_length ();
3845 struct inferior *inf;
3846 struct thread_info *thread;
3847 struct thread_info *selected = NULL;
3848 struct thread_info *lowest_stopped = NULL;
3849 struct thread_info *first = NULL;
3851 /* Consume the initial pending events. */
3852 while (pending_stop_replies-- > 0)
3854 ptid_t waiton_ptid = minus_one_ptid;
3856 struct target_waitstatus ws;
3857 int ignore_event = 0;
3858 struct thread_info *thread;
3860 memset (&ws, 0, sizeof (ws));
3861 event_ptid = target_wait (waiton_ptid, &ws, TARGET_WNOHANG);
3863 print_target_wait_results (waiton_ptid, event_ptid, &ws);
3867 case TARGET_WAITKIND_IGNORE:
3868 case TARGET_WAITKIND_NO_RESUMED:
3869 case TARGET_WAITKIND_SIGNALLED:
3870 case TARGET_WAITKIND_EXITED:
3871 /* We shouldn't see these, but if we do, just ignore. */
3873 fprintf_unfiltered (gdb_stdlog, "remote: event ignored\n");
3877 case TARGET_WAITKIND_EXECD:
3878 xfree (ws.value.execd_pathname);
3887 thread = find_thread_ptid (event_ptid);
3889 if (ws.kind == TARGET_WAITKIND_STOPPED)
3891 enum gdb_signal sig = ws.value.sig;
3893 /* Stubs traditionally report SIGTRAP as initial signal,
3894 instead of signal 0. Suppress it. */
3895 if (sig == GDB_SIGNAL_TRAP)
3897 thread->suspend.stop_signal = sig;
3901 thread->suspend.waitstatus = ws;
3903 if (ws.kind != TARGET_WAITKIND_STOPPED
3904 || ws.value.sig != GDB_SIGNAL_0)
3905 thread->suspend.waitstatus_pending_p = 1;
3907 set_executing (event_ptid, 0);
3908 set_running (event_ptid, 0);
3911 /* "Notice" the new inferiors before anything related to
3912 registers/memory. */
3918 inf->needs_setup = 1;
3922 thread = any_live_thread_of_process (inf->pid);
3923 notice_new_inferior (thread->ptid,
3924 thread->state == THREAD_RUNNING,
3929 /* If all-stop on top of non-stop, pause all threads. Note this
3930 records the threads' stop pc, so must be done after "noticing"
3934 stop_all_threads ();
3936 /* If all threads of an inferior were already stopped, we
3937 haven't setup the inferior yet. */
3943 if (inf->needs_setup)
3945 thread = any_live_thread_of_process (inf->pid);
3946 switch_to_thread_no_regs (thread);
3952 /* Now go over all threads that are stopped, and print their current
3953 frame. If all-stop, then if there's a signalled thread, pick
3955 ALL_NON_EXITED_THREADS (thread)
3961 set_running (thread->ptid, 0);
3962 else if (thread->state != THREAD_STOPPED)
3965 if (selected == NULL
3966 && thread->suspend.waitstatus_pending_p)
3969 if (lowest_stopped == NULL
3970 || thread->inf->num < lowest_stopped->inf->num
3971 || thread->per_inf_num < lowest_stopped->per_inf_num)
3972 lowest_stopped = thread;
3975 print_one_stopped_thread (thread);
3978 /* In all-stop, we only print the status of one thread, and leave
3979 others with their status pending. */
3984 thread = lowest_stopped;
3988 print_one_stopped_thread (thread);
3991 /* For "info program". */
3992 thread = inferior_thread ();
3993 if (thread->state == THREAD_STOPPED)
3994 set_last_target_status (inferior_ptid, thread->suspend.waitstatus);
3998 remote_start_remote (int from_tty, struct target_ops *target, int extended_p)
4000 struct remote_state *rs = get_remote_state ();
4001 struct packet_config *noack_config;
4002 char *wait_status = NULL;
4004 immediate_quit++; /* Allow user to interrupt it. */
4007 if (interrupt_on_connect)
4008 send_interrupt_sequence ();
4010 /* Ack any packet which the remote side has already sent. */
4011 serial_write (rs->remote_desc, "+", 1);
4013 /* Signal other parts that we're going through the initial setup,
4014 and so things may not be stable yet. */
4015 rs->starting_up = 1;
4017 /* The first packet we send to the target is the optional "supported
4018 packets" request. If the target can answer this, it will tell us
4019 which later probes to skip. */
4020 remote_query_supported ();
4022 /* If the stub wants to get a QAllow, compose one and send it. */
4023 if (packet_support (PACKET_QAllow) != PACKET_DISABLE)
4024 remote_set_permissions (target);
4026 /* Next, we possibly activate noack mode.
4028 If the QStartNoAckMode packet configuration is set to AUTO,
4029 enable noack mode if the stub reported a wish for it with
4032 If set to TRUE, then enable noack mode even if the stub didn't
4033 report it in qSupported. If the stub doesn't reply OK, the
4034 session ends with an error.
4036 If FALSE, then don't activate noack mode, regardless of what the
4037 stub claimed should be the default with qSupported. */
4039 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
4040 if (packet_config_support (noack_config) != PACKET_DISABLE)
4042 putpkt ("QStartNoAckMode");
4043 getpkt (&rs->buf, &rs->buf_size, 0);
4044 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
4050 /* Tell the remote that we are using the extended protocol. */
4052 getpkt (&rs->buf, &rs->buf_size, 0);
4055 /* Let the target know which signals it is allowed to pass down to
4057 update_signals_program_target ();
4059 /* Next, if the target can specify a description, read it. We do
4060 this before anything involving memory or registers. */
4061 target_find_description ();
4063 /* Next, now that we know something about the target, update the
4064 address spaces in the program spaces. */
4065 update_address_spaces ();
4067 /* On OSs where the list of libraries is global to all
4068 processes, we fetch them early. */
4069 if (gdbarch_has_global_solist (target_gdbarch ()))
4070 solib_add (NULL, from_tty, target, auto_solib_add);
4072 if (target_is_non_stop_p ())
4074 if (packet_support (PACKET_QNonStop) != PACKET_ENABLE)
4075 error (_("Non-stop mode requested, but remote "
4076 "does not support non-stop"));
4078 putpkt ("QNonStop:1");
4079 getpkt (&rs->buf, &rs->buf_size, 0);
4081 if (strcmp (rs->buf, "OK") != 0)
4082 error (_("Remote refused setting non-stop mode with: %s"), rs->buf);
4084 /* Find about threads and processes the stub is already
4085 controlling. We default to adding them in the running state.
4086 The '?' query below will then tell us about which threads are
4088 remote_update_thread_list (target);
4090 else if (packet_support (PACKET_QNonStop) == PACKET_ENABLE)
4092 /* Don't assume that the stub can operate in all-stop mode.
4093 Request it explicitly. */
4094 putpkt ("QNonStop:0");
4095 getpkt (&rs->buf, &rs->buf_size, 0);
4097 if (strcmp (rs->buf, "OK") != 0)
4098 error (_("Remote refused setting all-stop mode with: %s"), rs->buf);
4101 /* Upload TSVs regardless of whether the target is running or not. The
4102 remote stub, such as GDBserver, may have some predefined or builtin
4103 TSVs, even if the target is not running. */
4104 if (remote_get_trace_status (target, current_trace_status ()) != -1)
4106 struct uploaded_tsv *uploaded_tsvs = NULL;
4108 remote_upload_trace_state_variables (target, &uploaded_tsvs);
4109 merge_uploaded_trace_state_variables (&uploaded_tsvs);
4112 /* Check whether the target is running now. */
4114 getpkt (&rs->buf, &rs->buf_size, 0);
4116 if (!target_is_non_stop_p ())
4118 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
4121 error (_("The target is not running (try extended-remote?)"));
4123 /* We're connected, but not running. Drop out before we
4124 call start_remote. */
4125 rs->starting_up = 0;
4130 /* Save the reply for later. */
4131 wait_status = (char *) alloca (strlen (rs->buf) + 1);
4132 strcpy (wait_status, rs->buf);
4135 /* Fetch thread list. */
4136 target_update_thread_list ();
4138 /* Let the stub know that we want it to return the thread. */
4139 set_continue_thread (minus_one_ptid);
4141 if (thread_count () == 0)
4143 /* Target has no concept of threads at all. GDB treats
4144 non-threaded target as single-threaded; add a main
4146 add_current_inferior_and_thread (wait_status);
4150 /* We have thread information; select the thread the target
4151 says should be current. If we're reconnecting to a
4152 multi-threaded program, this will ideally be the thread
4153 that last reported an event before GDB disconnected. */
4154 inferior_ptid = get_current_thread (wait_status);
4155 if (ptid_equal (inferior_ptid, null_ptid))
4157 /* Odd... The target was able to list threads, but not
4158 tell us which thread was current (no "thread"
4159 register in T stop reply?). Just pick the first
4160 thread in the thread list then. */
4163 fprintf_unfiltered (gdb_stdlog,
4164 "warning: couldn't determine remote "
4165 "current thread; picking first in list.\n");
4167 inferior_ptid = thread_list->ptid;
4171 /* init_wait_for_inferior should be called before get_offsets in order
4172 to manage `inserted' flag in bp loc in a correct state.
4173 breakpoint_init_inferior, called from init_wait_for_inferior, set
4174 `inserted' flag to 0, while before breakpoint_re_set, called from
4175 start_remote, set `inserted' flag to 1. In the initialization of
4176 inferior, breakpoint_init_inferior should be called first, and then
4177 breakpoint_re_set can be called. If this order is broken, state of
4178 `inserted' flag is wrong, and cause some problems on breakpoint
4180 init_wait_for_inferior ();
4182 get_offsets (); /* Get text, data & bss offsets. */
4184 /* If we could not find a description using qXfer, and we know
4185 how to do it some other way, try again. This is not
4186 supported for non-stop; it could be, but it is tricky if
4187 there are no stopped threads when we connect. */
4188 if (remote_read_description_p (target)
4189 && gdbarch_target_desc (target_gdbarch ()) == NULL)
4191 target_clear_description ();
4192 target_find_description ();
4195 /* Use the previously fetched status. */
4196 gdb_assert (wait_status != NULL);
4197 strcpy (rs->buf, wait_status);
4198 rs->cached_wait_status = 1;
4201 start_remote (from_tty); /* Initialize gdb process mechanisms. */
4205 /* Clear WFI global state. Do this before finding about new
4206 threads and inferiors, and setting the current inferior.
4207 Otherwise we would clear the proceed status of the current
4208 inferior when we want its stop_soon state to be preserved
4209 (see notice_new_inferior). */
4210 init_wait_for_inferior ();
4212 /* In non-stop, we will either get an "OK", meaning that there
4213 are no stopped threads at this time; or, a regular stop
4214 reply. In the latter case, there may be more than one thread
4215 stopped --- we pull them all out using the vStopped
4217 if (strcmp (rs->buf, "OK") != 0)
4219 struct notif_client *notif = ¬if_client_stop;
4221 /* remote_notif_get_pending_replies acks this one, and gets
4223 rs->notif_state->pending_event[notif_client_stop.id]
4224 = remote_notif_parse (notif, rs->buf);
4225 remote_notif_get_pending_events (notif);
4228 if (thread_count () == 0)
4231 error (_("The target is not running (try extended-remote?)"));
4233 /* We're connected, but not running. Drop out before we
4234 call start_remote. */
4235 rs->starting_up = 0;
4239 /* In non-stop mode, any cached wait status will be stored in
4240 the stop reply queue. */
4241 gdb_assert (wait_status == NULL);
4243 /* Report all signals during attach/startup. */
4244 remote_pass_signals (target, 0, NULL);
4246 /* If there are already stopped threads, mark them stopped and
4247 report their stops before giving the prompt to the user. */
4248 process_initial_stop_replies (from_tty);
4250 if (target_can_async_p ())
4254 /* If we connected to a live target, do some additional setup. */
4255 if (target_has_execution)
4257 if (symfile_objfile) /* No use without a symbol-file. */
4258 remote_check_symbols ();
4261 /* Possibly the target has been engaged in a trace run started
4262 previously; find out where things are at. */
4263 if (remote_get_trace_status (target, current_trace_status ()) != -1)
4265 struct uploaded_tp *uploaded_tps = NULL;
4267 if (current_trace_status ()->running)
4268 printf_filtered (_("Trace is already running on the target.\n"));
4270 remote_upload_tracepoints (target, &uploaded_tps);
4272 merge_uploaded_tracepoints (&uploaded_tps);
4275 /* The thread and inferior lists are now synchronized with the
4276 target, our symbols have been relocated, and we're merged the
4277 target's tracepoints with ours. We're done with basic start
4279 rs->starting_up = 0;
4281 /* Maybe breakpoints are global and need to be inserted now. */
4282 if (breakpoints_should_be_inserted_now ())
4283 insert_breakpoints ();
4286 /* Open a connection to a remote debugger.
4287 NAME is the filename used for communication. */
4290 remote_open (const char *name, int from_tty)
4292 remote_open_1 (name, from_tty, &remote_ops, 0);
4295 /* Open a connection to a remote debugger using the extended
4296 remote gdb protocol. NAME is the filename used for communication. */
4299 extended_remote_open (const char *name, int from_tty)
4301 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
4304 /* Reset all packets back to "unknown support". Called when opening a
4305 new connection to a remote target. */
4308 reset_all_packet_configs_support (void)
4312 for (i = 0; i < PACKET_MAX; i++)
4313 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
4316 /* Initialize all packet configs. */
4319 init_all_packet_configs (void)
4323 for (i = 0; i < PACKET_MAX; i++)
4325 remote_protocol_packets[i].detect = AUTO_BOOLEAN_AUTO;
4326 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
4330 /* Symbol look-up. */
4333 remote_check_symbols (void)
4335 struct remote_state *rs = get_remote_state ();
4336 char *msg, *reply, *tmp;
4339 struct cleanup *old_chain;
4341 /* The remote side has no concept of inferiors that aren't running
4342 yet, it only knows about running processes. If we're connected
4343 but our current inferior is not running, we should not invite the
4344 remote target to request symbol lookups related to its
4345 (unrelated) current process. */
4346 if (!target_has_execution)
4349 if (packet_support (PACKET_qSymbol) == PACKET_DISABLE)
4352 /* Make sure the remote is pointing at the right process. Note
4353 there's no way to select "no process". */
4354 set_general_process ();
4356 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4357 because we need both at the same time. */
4358 msg = (char *) xmalloc (get_remote_packet_size ());
4359 old_chain = make_cleanup (xfree, msg);
4360 reply = (char *) xmalloc (get_remote_packet_size ());
4361 make_cleanup (free_current_contents, &reply);
4362 reply_size = get_remote_packet_size ();
4364 /* Invite target to request symbol lookups. */
4366 putpkt ("qSymbol::");
4367 getpkt (&reply, &reply_size, 0);
4368 packet_ok (reply, &remote_protocol_packets[PACKET_qSymbol]);
4370 while (startswith (reply, "qSymbol:"))
4372 struct bound_minimal_symbol sym;
4375 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
4377 sym = lookup_minimal_symbol (msg, NULL, NULL);
4378 if (sym.minsym == NULL)
4379 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
4382 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
4383 CORE_ADDR sym_addr = BMSYMBOL_VALUE_ADDRESS (sym);
4385 /* If this is a function address, return the start of code
4386 instead of any data function descriptor. */
4387 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4391 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
4392 phex_nz (sym_addr, addr_size), &reply[8]);
4396 getpkt (&reply, &reply_size, 0);
4399 do_cleanups (old_chain);
4402 static struct serial *
4403 remote_serial_open (const char *name)
4405 static int udp_warning = 0;
4407 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4408 of in ser-tcp.c, because it is the remote protocol assuming that the
4409 serial connection is reliable and not the serial connection promising
4411 if (!udp_warning && startswith (name, "udp:"))
4413 warning (_("The remote protocol may be unreliable over UDP.\n"
4414 "Some events may be lost, rendering further debugging "
4419 return serial_open (name);
4422 /* Inform the target of our permission settings. The permission flags
4423 work without this, but if the target knows the settings, it can do
4424 a couple things. First, it can add its own check, to catch cases
4425 that somehow manage to get by the permissions checks in target
4426 methods. Second, if the target is wired to disallow particular
4427 settings (for instance, a system in the field that is not set up to
4428 be able to stop at a breakpoint), it can object to any unavailable
4432 remote_set_permissions (struct target_ops *self)
4434 struct remote_state *rs = get_remote_state ();
4436 xsnprintf (rs->buf, get_remote_packet_size (), "QAllow:"
4437 "WriteReg:%x;WriteMem:%x;"
4438 "InsertBreak:%x;InsertTrace:%x;"
4439 "InsertFastTrace:%x;Stop:%x",
4440 may_write_registers, may_write_memory,
4441 may_insert_breakpoints, may_insert_tracepoints,
4442 may_insert_fast_tracepoints, may_stop);
4444 getpkt (&rs->buf, &rs->buf_size, 0);
4446 /* If the target didn't like the packet, warn the user. Do not try
4447 to undo the user's settings, that would just be maddening. */
4448 if (strcmp (rs->buf, "OK") != 0)
4449 warning (_("Remote refused setting permissions with: %s"), rs->buf);
4452 /* This type describes each known response to the qSupported
4454 struct protocol_feature
4456 /* The name of this protocol feature. */
4459 /* The default for this protocol feature. */
4460 enum packet_support default_support;
4462 /* The function to call when this feature is reported, or after
4463 qSupported processing if the feature is not supported.
4464 The first argument points to this structure. The second
4465 argument indicates whether the packet requested support be
4466 enabled, disabled, or probed (or the default, if this function
4467 is being called at the end of processing and this feature was
4468 not reported). The third argument may be NULL; if not NULL, it
4469 is a NUL-terminated string taken from the packet following
4470 this feature's name and an equals sign. */
4471 void (*func) (const struct protocol_feature *, enum packet_support,
4474 /* The corresponding packet for this feature. Only used if
4475 FUNC is remote_supported_packet. */
4480 remote_supported_packet (const struct protocol_feature *feature,
4481 enum packet_support support,
4482 const char *argument)
4486 warning (_("Remote qSupported response supplied an unexpected value for"
4487 " \"%s\"."), feature->name);
4491 remote_protocol_packets[feature->packet].support = support;
4495 remote_packet_size (const struct protocol_feature *feature,
4496 enum packet_support support, const char *value)
4498 struct remote_state *rs = get_remote_state ();
4503 if (support != PACKET_ENABLE)
4506 if (value == NULL || *value == '\0')
4508 warning (_("Remote target reported \"%s\" without a size."),
4514 packet_size = strtol (value, &value_end, 16);
4515 if (errno != 0 || *value_end != '\0' || packet_size < 0)
4517 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4518 feature->name, value);
4522 /* Record the new maximum packet size. */
4523 rs->explicit_packet_size = packet_size;
4526 static const struct protocol_feature remote_protocol_features[] = {
4527 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
4528 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
4529 PACKET_qXfer_auxv },
4530 { "qXfer:exec-file:read", PACKET_DISABLE, remote_supported_packet,
4531 PACKET_qXfer_exec_file },
4532 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
4533 PACKET_qXfer_features },
4534 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
4535 PACKET_qXfer_libraries },
4536 { "qXfer:libraries-svr4:read", PACKET_DISABLE, remote_supported_packet,
4537 PACKET_qXfer_libraries_svr4 },
4538 { "augmented-libraries-svr4-read", PACKET_DISABLE,
4539 remote_supported_packet, PACKET_augmented_libraries_svr4_read_feature },
4540 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
4541 PACKET_qXfer_memory_map },
4542 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
4543 PACKET_qXfer_spu_read },
4544 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
4545 PACKET_qXfer_spu_write },
4546 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
4547 PACKET_qXfer_osdata },
4548 { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet,
4549 PACKET_qXfer_threads },
4550 { "qXfer:traceframe-info:read", PACKET_DISABLE, remote_supported_packet,
4551 PACKET_qXfer_traceframe_info },
4552 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
4553 PACKET_QPassSignals },
4554 { "QCatchSyscalls", PACKET_DISABLE, remote_supported_packet,
4555 PACKET_QCatchSyscalls },
4556 { "QProgramSignals", PACKET_DISABLE, remote_supported_packet,
4557 PACKET_QProgramSignals },
4558 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
4559 PACKET_QStartNoAckMode },
4560 { "multiprocess", PACKET_DISABLE, remote_supported_packet,
4561 PACKET_multiprocess_feature },
4562 { "QNonStop", PACKET_DISABLE, remote_supported_packet, PACKET_QNonStop },
4563 { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
4564 PACKET_qXfer_siginfo_read },
4565 { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
4566 PACKET_qXfer_siginfo_write },
4567 { "ConditionalTracepoints", PACKET_DISABLE, remote_supported_packet,
4568 PACKET_ConditionalTracepoints },
4569 { "ConditionalBreakpoints", PACKET_DISABLE, remote_supported_packet,
4570 PACKET_ConditionalBreakpoints },
4571 { "BreakpointCommands", PACKET_DISABLE, remote_supported_packet,
4572 PACKET_BreakpointCommands },
4573 { "FastTracepoints", PACKET_DISABLE, remote_supported_packet,
4574 PACKET_FastTracepoints },
4575 { "StaticTracepoints", PACKET_DISABLE, remote_supported_packet,
4576 PACKET_StaticTracepoints },
4577 {"InstallInTrace", PACKET_DISABLE, remote_supported_packet,
4578 PACKET_InstallInTrace},
4579 { "DisconnectedTracing", PACKET_DISABLE, remote_supported_packet,
4580 PACKET_DisconnectedTracing_feature },
4581 { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
4583 { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
4585 { "TracepointSource", PACKET_DISABLE, remote_supported_packet,
4586 PACKET_TracepointSource },
4587 { "QAllow", PACKET_DISABLE, remote_supported_packet,
4589 { "EnableDisableTracepoints", PACKET_DISABLE, remote_supported_packet,
4590 PACKET_EnableDisableTracepoints_feature },
4591 { "qXfer:fdpic:read", PACKET_DISABLE, remote_supported_packet,
4592 PACKET_qXfer_fdpic },
4593 { "qXfer:uib:read", PACKET_DISABLE, remote_supported_packet,
4595 { "QDisableRandomization", PACKET_DISABLE, remote_supported_packet,
4596 PACKET_QDisableRandomization },
4597 { "QAgent", PACKET_DISABLE, remote_supported_packet, PACKET_QAgent},
4598 { "QTBuffer:size", PACKET_DISABLE,
4599 remote_supported_packet, PACKET_QTBuffer_size},
4600 { "tracenz", PACKET_DISABLE, remote_supported_packet, PACKET_tracenz_feature },
4601 { "Qbtrace:off", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_off },
4602 { "Qbtrace:bts", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_bts },
4603 { "Qbtrace:pt", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_pt },
4604 { "qXfer:btrace:read", PACKET_DISABLE, remote_supported_packet,
4605 PACKET_qXfer_btrace },
4606 { "qXfer:btrace-conf:read", PACKET_DISABLE, remote_supported_packet,
4607 PACKET_qXfer_btrace_conf },
4608 { "Qbtrace-conf:bts:size", PACKET_DISABLE, remote_supported_packet,
4609 PACKET_Qbtrace_conf_bts_size },
4610 { "swbreak", PACKET_DISABLE, remote_supported_packet, PACKET_swbreak_feature },
4611 { "hwbreak", PACKET_DISABLE, remote_supported_packet, PACKET_hwbreak_feature },
4612 { "fork-events", PACKET_DISABLE, remote_supported_packet,
4613 PACKET_fork_event_feature },
4614 { "vfork-events", PACKET_DISABLE, remote_supported_packet,
4615 PACKET_vfork_event_feature },
4616 { "exec-events", PACKET_DISABLE, remote_supported_packet,
4617 PACKET_exec_event_feature },
4618 { "Qbtrace-conf:pt:size", PACKET_DISABLE, remote_supported_packet,
4619 PACKET_Qbtrace_conf_pt_size },
4620 { "vContSupported", PACKET_DISABLE, remote_supported_packet, PACKET_vContSupported },
4621 { "QThreadEvents", PACKET_DISABLE, remote_supported_packet, PACKET_QThreadEvents },
4622 { "no-resumed", PACKET_DISABLE, remote_supported_packet, PACKET_no_resumed },
4625 static char *remote_support_xml;
4627 /* Register string appended to "xmlRegisters=" in qSupported query. */
4630 register_remote_support_xml (const char *xml)
4632 #if defined(HAVE_LIBEXPAT)
4633 if (remote_support_xml == NULL)
4634 remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL);
4637 char *copy = xstrdup (remote_support_xml + 13);
4638 char *p = strtok (copy, ",");
4642 if (strcmp (p, xml) == 0)
4649 while ((p = strtok (NULL, ",")) != NULL);
4652 remote_support_xml = reconcat (remote_support_xml,
4653 remote_support_xml, ",", xml,
4660 remote_query_supported_append (char *msg, const char *append)
4663 return reconcat (msg, msg, ";", append, (char *) NULL);
4665 return xstrdup (append);
4669 remote_query_supported (void)
4671 struct remote_state *rs = get_remote_state ();
4674 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
4676 /* The packet support flags are handled differently for this packet
4677 than for most others. We treat an error, a disabled packet, and
4678 an empty response identically: any features which must be reported
4679 to be used will be automatically disabled. An empty buffer
4680 accomplishes this, since that is also the representation for a list
4681 containing no features. */
4684 if (packet_support (PACKET_qSupported) != PACKET_DISABLE)
4687 struct cleanup *old_chain = make_cleanup (free_current_contents, &q);
4689 if (packet_set_cmd_state (PACKET_multiprocess_feature) != AUTO_BOOLEAN_FALSE)
4690 q = remote_query_supported_append (q, "multiprocess+");
4692 if (packet_set_cmd_state (PACKET_swbreak_feature) != AUTO_BOOLEAN_FALSE)
4693 q = remote_query_supported_append (q, "swbreak+");
4694 if (packet_set_cmd_state (PACKET_hwbreak_feature) != AUTO_BOOLEAN_FALSE)
4695 q = remote_query_supported_append (q, "hwbreak+");
4697 q = remote_query_supported_append (q, "qRelocInsn+");
4699 if (packet_set_cmd_state (PACKET_fork_event_feature)
4700 != AUTO_BOOLEAN_FALSE)
4701 q = remote_query_supported_append (q, "fork-events+");
4702 if (packet_set_cmd_state (PACKET_vfork_event_feature)
4703 != AUTO_BOOLEAN_FALSE)
4704 q = remote_query_supported_append (q, "vfork-events+");
4705 if (packet_set_cmd_state (PACKET_exec_event_feature)
4706 != AUTO_BOOLEAN_FALSE)
4707 q = remote_query_supported_append (q, "exec-events+");
4709 if (packet_set_cmd_state (PACKET_vContSupported) != AUTO_BOOLEAN_FALSE)
4710 q = remote_query_supported_append (q, "vContSupported+");
4712 if (packet_set_cmd_state (PACKET_QThreadEvents) != AUTO_BOOLEAN_FALSE)
4713 q = remote_query_supported_append (q, "QThreadEvents+");
4715 if (packet_set_cmd_state (PACKET_no_resumed) != AUTO_BOOLEAN_FALSE)
4716 q = remote_query_supported_append (q, "no-resumed+");
4718 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4719 the qSupported:xmlRegisters=i386 handling. */
4720 if (remote_support_xml != NULL)
4721 q = remote_query_supported_append (q, remote_support_xml);
4723 q = reconcat (q, "qSupported:", q, (char *) NULL);
4726 do_cleanups (old_chain);
4728 getpkt (&rs->buf, &rs->buf_size, 0);
4730 /* If an error occured, warn, but do not return - just reset the
4731 buffer to empty and go on to disable features. */
4732 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
4735 warning (_("Remote failure reply: %s"), rs->buf);
4740 memset (seen, 0, sizeof (seen));
4745 enum packet_support is_supported;
4746 char *p, *end, *name_end, *value;
4748 /* First separate out this item from the rest of the packet. If
4749 there's another item after this, we overwrite the separator
4750 (terminated strings are much easier to work with). */
4752 end = strchr (p, ';');
4755 end = p + strlen (p);
4765 warning (_("empty item in \"qSupported\" response"));
4770 name_end = strchr (p, '=');
4773 /* This is a name=value entry. */
4774 is_supported = PACKET_ENABLE;
4775 value = name_end + 1;
4784 is_supported = PACKET_ENABLE;
4788 is_supported = PACKET_DISABLE;
4792 is_supported = PACKET_SUPPORT_UNKNOWN;
4796 warning (_("unrecognized item \"%s\" "
4797 "in \"qSupported\" response"), p);
4803 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4804 if (strcmp (remote_protocol_features[i].name, p) == 0)
4806 const struct protocol_feature *feature;
4809 feature = &remote_protocol_features[i];
4810 feature->func (feature, is_supported, value);
4815 /* If we increased the packet size, make sure to increase the global
4816 buffer size also. We delay this until after parsing the entire
4817 qSupported packet, because this is the same buffer we were
4819 if (rs->buf_size < rs->explicit_packet_size)
4821 rs->buf_size = rs->explicit_packet_size;
4822 rs->buf = (char *) xrealloc (rs->buf, rs->buf_size);
4825 /* Handle the defaults for unmentioned features. */
4826 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4829 const struct protocol_feature *feature;
4831 feature = &remote_protocol_features[i];
4832 feature->func (feature, feature->default_support, NULL);
4836 /* Remove any of the remote.c targets from target stack. Upper targets depend
4837 on it so remove them first. */
4840 remote_unpush_target (void)
4842 pop_all_targets_at_and_above (process_stratum);
4846 remote_open_1 (const char *name, int from_tty,
4847 struct target_ops *target, int extended_p)
4849 struct remote_state *rs = get_remote_state ();
4852 error (_("To open a remote debug connection, you need to specify what\n"
4853 "serial device is attached to the remote system\n"
4854 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4856 /* See FIXME above. */
4857 if (!target_async_permitted)
4858 wait_forever_enabled_p = 1;
4860 /* If we're connected to a running target, target_preopen will kill it.
4861 Ask this question first, before target_preopen has a chance to kill
4863 if (rs->remote_desc != NULL && !have_inferiors ())
4866 && !query (_("Already connected to a remote target. Disconnect? ")))
4867 error (_("Still connected."));
4870 /* Here the possibly existing remote target gets unpushed. */
4871 target_preopen (from_tty);
4873 /* Make sure we send the passed signals list the next time we resume. */
4874 xfree (rs->last_pass_packet);
4875 rs->last_pass_packet = NULL;
4877 /* Make sure we send the program signals list the next time we
4879 xfree (rs->last_program_signals_packet);
4880 rs->last_program_signals_packet = NULL;
4882 remote_fileio_reset ();
4883 reopen_exec_file ();
4886 rs->remote_desc = remote_serial_open (name);
4887 if (!rs->remote_desc)
4888 perror_with_name (name);
4890 if (baud_rate != -1)
4892 if (serial_setbaudrate (rs->remote_desc, baud_rate))
4894 /* The requested speed could not be set. Error out to
4895 top level after closing remote_desc. Take care to
4896 set remote_desc to NULL to avoid closing remote_desc
4898 serial_close (rs->remote_desc);
4899 rs->remote_desc = NULL;
4900 perror_with_name (name);
4904 serial_setparity (rs->remote_desc, serial_parity);
4905 serial_raw (rs->remote_desc);
4907 /* If there is something sitting in the buffer we might take it as a
4908 response to a command, which would be bad. */
4909 serial_flush_input (rs->remote_desc);
4913 puts_filtered ("Remote debugging using ");
4914 puts_filtered (name);
4915 puts_filtered ("\n");
4917 push_target (target); /* Switch to using remote target now. */
4919 /* Register extra event sources in the event loop. */
4920 remote_async_inferior_event_token
4921 = create_async_event_handler (remote_async_inferior_event_handler,
4923 rs->notif_state = remote_notif_state_allocate ();
4925 /* Reset the target state; these things will be queried either by
4926 remote_query_supported or as they are needed. */
4927 reset_all_packet_configs_support ();
4928 rs->cached_wait_status = 0;
4929 rs->explicit_packet_size = 0;
4931 rs->extended = extended_p;
4932 rs->waiting_for_stop_reply = 0;
4933 rs->ctrlc_pending_p = 0;
4935 rs->general_thread = not_sent_ptid;
4936 rs->continue_thread = not_sent_ptid;
4937 rs->remote_traceframe_number = -1;
4939 /* Probe for ability to use "ThreadInfo" query, as required. */
4940 rs->use_threadinfo_query = 1;
4941 rs->use_threadextra_query = 1;
4943 readahead_cache_invalidate ();
4945 if (target_async_permitted)
4947 /* With this target we start out by owning the terminal. */
4948 remote_async_terminal_ours_p = 1;
4950 /* FIXME: cagney/1999-09-23: During the initial connection it is
4951 assumed that the target is already ready and able to respond to
4952 requests. Unfortunately remote_start_remote() eventually calls
4953 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
4954 around this. Eventually a mechanism that allows
4955 wait_for_inferior() to expect/get timeouts will be
4957 wait_forever_enabled_p = 0;
4960 /* First delete any symbols previously loaded from shared libraries. */
4961 no_shared_libraries (NULL, 0);
4964 init_thread_list ();
4966 /* Start the remote connection. If error() or QUIT, discard this
4967 target (we'd otherwise be in an inconsistent state) and then
4968 propogate the error on up the exception chain. This ensures that
4969 the caller doesn't stumble along blindly assuming that the
4970 function succeeded. The CLI doesn't have this problem but other
4971 UI's, such as MI do.
4973 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
4974 this function should return an error indication letting the
4975 caller restore the previous state. Unfortunately the command
4976 ``target remote'' is directly wired to this function making that
4977 impossible. On a positive note, the CLI side of this problem has
4978 been fixed - the function set_cmd_context() makes it possible for
4979 all the ``target ....'' commands to share a common callback
4980 function. See cli-dump.c. */
4985 remote_start_remote (from_tty, target, extended_p);
4987 CATCH (ex, RETURN_MASK_ALL)
4989 /* Pop the partially set up target - unless something else did
4990 already before throwing the exception. */
4991 if (rs->remote_desc != NULL)
4992 remote_unpush_target ();
4993 if (target_async_permitted)
4994 wait_forever_enabled_p = 1;
4995 throw_exception (ex);
5000 remote_btrace_reset ();
5002 if (target_async_permitted)
5003 wait_forever_enabled_p = 1;
5006 /* Detach the specified process. */
5009 remote_detach_pid (int pid)
5011 struct remote_state *rs = get_remote_state ();
5013 if (remote_multi_process_p (rs))
5014 xsnprintf (rs->buf, get_remote_packet_size (), "D;%x", pid);
5016 strcpy (rs->buf, "D");
5019 getpkt (&rs->buf, &rs->buf_size, 0);
5021 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
5023 else if (rs->buf[0] == '\0')
5024 error (_("Remote doesn't know how to detach"));
5026 error (_("Can't detach process."));
5029 /* This detaches a program to which we previously attached, using
5030 inferior_ptid to identify the process. After this is done, GDB
5031 can be used to debug some other program. We better not have left
5032 any breakpoints in the target program or it'll die when it hits
5036 remote_detach_1 (const char *args, int from_tty)
5038 int pid = ptid_get_pid (inferior_ptid);
5039 struct remote_state *rs = get_remote_state ();
5040 struct thread_info *tp = find_thread_ptid (inferior_ptid);
5044 error (_("Argument given to \"detach\" when remotely debugging."));
5046 if (!target_has_execution)
5047 error (_("No process to detach from."));
5051 char *exec_file = get_exec_file (0);
5052 if (exec_file == NULL)
5054 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
5055 target_pid_to_str (pid_to_ptid (pid)));
5056 gdb_flush (gdb_stdout);
5059 /* Tell the remote target to detach. */
5060 remote_detach_pid (pid);
5062 /* Exit only if this is the only active inferior. */
5063 if (from_tty && !rs->extended && number_of_live_inferiors () == 1)
5064 puts_filtered (_("Ending remote debugging.\n"));
5066 /* Check to see if we are detaching a fork parent. Note that if we
5067 are detaching a fork child, tp == NULL. */
5068 is_fork_parent = (tp != NULL
5069 && tp->pending_follow.kind == TARGET_WAITKIND_FORKED);
5071 /* If doing detach-on-fork, we don't mourn, because that will delete
5072 breakpoints that should be available for the followed inferior. */
5073 if (!is_fork_parent)
5074 target_mourn_inferior ();
5077 inferior_ptid = null_ptid;
5078 detach_inferior (pid);
5083 remote_detach (struct target_ops *ops, const char *args, int from_tty)
5085 remote_detach_1 (args, from_tty);
5089 extended_remote_detach (struct target_ops *ops, const char *args, int from_tty)
5091 remote_detach_1 (args, from_tty);
5094 /* Target follow-fork function for remote targets. On entry, and
5095 at return, the current inferior is the fork parent.
5097 Note that although this is currently only used for extended-remote,
5098 it is named remote_follow_fork in anticipation of using it for the
5099 remote target as well. */
5102 remote_follow_fork (struct target_ops *ops, int follow_child,
5105 struct remote_state *rs = get_remote_state ();
5106 enum target_waitkind kind = inferior_thread ()->pending_follow.kind;
5108 if ((kind == TARGET_WAITKIND_FORKED && remote_fork_event_p (rs))
5109 || (kind == TARGET_WAITKIND_VFORKED && remote_vfork_event_p (rs)))
5111 /* When following the parent and detaching the child, we detach
5112 the child here. For the case of following the child and
5113 detaching the parent, the detach is done in the target-
5114 independent follow fork code in infrun.c. We can't use
5115 target_detach when detaching an unfollowed child because
5116 the client side doesn't know anything about the child. */
5117 if (detach_fork && !follow_child)
5119 /* Detach the fork child. */
5123 child_ptid = inferior_thread ()->pending_follow.value.related_pid;
5124 child_pid = ptid_get_pid (child_ptid);
5126 remote_detach_pid (child_pid);
5127 detach_inferior (child_pid);
5133 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5134 in the program space of the new inferior. On entry and at return the
5135 current inferior is the exec'ing inferior. INF is the new exec'd
5136 inferior, which may be the same as the exec'ing inferior unless
5137 follow-exec-mode is "new". */
5140 remote_follow_exec (struct target_ops *ops,
5141 struct inferior *inf, char *execd_pathname)
5143 /* We know that this is a target file name, so if it has the "target:"
5144 prefix we strip it off before saving it in the program space. */
5145 if (is_target_filename (execd_pathname))
5146 execd_pathname += strlen (TARGET_SYSROOT_PREFIX);
5148 set_pspace_remote_exec_file (inf->pspace, execd_pathname);
5151 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5154 remote_disconnect (struct target_ops *target, const char *args, int from_tty)
5157 error (_("Argument given to \"disconnect\" when remotely debugging."));
5159 /* Make sure we unpush even the extended remote targets. Calling
5160 target_mourn_inferior won't unpush, and remote_mourn won't
5161 unpush if there is more than one inferior left. */
5162 unpush_target (target);
5163 generic_mourn_inferior ();
5166 puts_filtered ("Ending remote debugging.\n");
5169 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5170 be chatty about it. */
5173 extended_remote_attach (struct target_ops *target, const char *args,
5176 struct remote_state *rs = get_remote_state ();
5178 char *wait_status = NULL;
5180 pid = parse_pid_to_attach (args);
5182 /* Remote PID can be freely equal to getpid, do not check it here the same
5183 way as in other targets. */
5185 if (packet_support (PACKET_vAttach) == PACKET_DISABLE)
5186 error (_("This target does not support attaching to a process"));
5190 char *exec_file = get_exec_file (0);
5193 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
5194 target_pid_to_str (pid_to_ptid (pid)));
5196 printf_unfiltered (_("Attaching to %s\n"),
5197 target_pid_to_str (pid_to_ptid (pid)));
5199 gdb_flush (gdb_stdout);
5202 xsnprintf (rs->buf, get_remote_packet_size (), "vAttach;%x", pid);
5204 getpkt (&rs->buf, &rs->buf_size, 0);
5206 switch (packet_ok (rs->buf,
5207 &remote_protocol_packets[PACKET_vAttach]))
5210 if (!target_is_non_stop_p ())
5212 /* Save the reply for later. */
5213 wait_status = (char *) alloca (strlen (rs->buf) + 1);
5214 strcpy (wait_status, rs->buf);
5216 else if (strcmp (rs->buf, "OK") != 0)
5217 error (_("Attaching to %s failed with: %s"),
5218 target_pid_to_str (pid_to_ptid (pid)),
5221 case PACKET_UNKNOWN:
5222 error (_("This target does not support attaching to a process"));
5224 error (_("Attaching to %s failed"),
5225 target_pid_to_str (pid_to_ptid (pid)));
5228 set_current_inferior (remote_add_inferior (0, pid, 1, 0));
5230 inferior_ptid = pid_to_ptid (pid);
5232 if (target_is_non_stop_p ())
5234 struct thread_info *thread;
5236 /* Get list of threads. */
5237 remote_update_thread_list (target);
5239 thread = first_thread_of_process (pid);
5241 inferior_ptid = thread->ptid;
5243 inferior_ptid = pid_to_ptid (pid);
5245 /* Invalidate our notion of the remote current thread. */
5246 record_currthread (rs, minus_one_ptid);
5250 /* Now, if we have thread information, update inferior_ptid. */
5251 inferior_ptid = remote_current_thread (inferior_ptid);
5253 /* Add the main thread to the thread list. */
5254 add_thread_silent (inferior_ptid);
5257 /* Next, if the target can specify a description, read it. We do
5258 this before anything involving memory or registers. */
5259 target_find_description ();
5261 if (!target_is_non_stop_p ())
5263 /* Use the previously fetched status. */
5264 gdb_assert (wait_status != NULL);
5266 if (target_can_async_p ())
5268 struct notif_event *reply
5269 = remote_notif_parse (¬if_client_stop, wait_status);
5271 push_stop_reply ((struct stop_reply *) reply);
5277 gdb_assert (wait_status != NULL);
5278 strcpy (rs->buf, wait_status);
5279 rs->cached_wait_status = 1;
5283 gdb_assert (wait_status == NULL);
5286 /* Implementation of the to_post_attach method. */
5289 extended_remote_post_attach (struct target_ops *ops, int pid)
5291 /* Get text, data & bss offsets. */
5294 /* In certain cases GDB might not have had the chance to start
5295 symbol lookup up until now. This could happen if the debugged
5296 binary is not using shared libraries, the vsyscall page is not
5297 present (on Linux) and the binary itself hadn't changed since the
5298 debugging process was started. */
5299 if (symfile_objfile != NULL)
5300 remote_check_symbols();
5304 /* Check for the availability of vCont. This function should also check
5308 remote_vcont_probe (struct remote_state *rs)
5312 strcpy (rs->buf, "vCont?");
5314 getpkt (&rs->buf, &rs->buf_size, 0);
5317 /* Make sure that the features we assume are supported. */
5318 if (startswith (buf, "vCont"))
5321 int support_c, support_C;
5323 rs->supports_vCont.s = 0;
5324 rs->supports_vCont.S = 0;
5327 rs->supports_vCont.t = 0;
5328 rs->supports_vCont.r = 0;
5329 while (p && *p == ';')
5332 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
5333 rs->supports_vCont.s = 1;
5334 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
5335 rs->supports_vCont.S = 1;
5336 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
5338 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
5340 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
5341 rs->supports_vCont.t = 1;
5342 else if (*p == 'r' && (*(p + 1) == ';' || *(p + 1) == 0))
5343 rs->supports_vCont.r = 1;
5345 p = strchr (p, ';');
5348 /* If c, and C are not all supported, we can't use vCont. Clearing
5349 BUF will make packet_ok disable the packet. */
5350 if (!support_c || !support_C)
5354 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
5357 /* Helper function for building "vCont" resumptions. Write a
5358 resumption to P. ENDP points to one-passed-the-end of the buffer
5359 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5360 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5361 resumed thread should be single-stepped and/or signalled. If PTID
5362 equals minus_one_ptid, then all threads are resumed; if PTID
5363 represents a process, then all threads of the process are resumed;
5364 the thread to be stepped and/or signalled is given in the global
5368 append_resumption (char *p, char *endp,
5369 ptid_t ptid, int step, enum gdb_signal siggnal)
5371 struct remote_state *rs = get_remote_state ();
5373 if (step && siggnal != GDB_SIGNAL_0)
5374 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
5376 /* GDB is willing to range step. */
5377 && use_range_stepping
5378 /* Target supports range stepping. */
5379 && rs->supports_vCont.r
5380 /* We don't currently support range stepping multiple
5381 threads with a wildcard (though the protocol allows it,
5382 so stubs shouldn't make an active effort to forbid
5384 && !(remote_multi_process_p (rs) && ptid_is_pid (ptid)))
5386 struct thread_info *tp;
5388 if (ptid_equal (ptid, minus_one_ptid))
5390 /* If we don't know about the target thread's tid, then
5391 we're resuming magic_null_ptid (see caller). */
5392 tp = find_thread_ptid (magic_null_ptid);
5395 tp = find_thread_ptid (ptid);
5396 gdb_assert (tp != NULL);
5398 if (tp->control.may_range_step)
5400 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
5402 p += xsnprintf (p, endp - p, ";r%s,%s",
5403 phex_nz (tp->control.step_range_start,
5405 phex_nz (tp->control.step_range_end,
5409 p += xsnprintf (p, endp - p, ";s");
5412 p += xsnprintf (p, endp - p, ";s");
5413 else if (siggnal != GDB_SIGNAL_0)
5414 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
5416 p += xsnprintf (p, endp - p, ";c");
5418 if (remote_multi_process_p (rs) && ptid_is_pid (ptid))
5422 /* All (-1) threads of process. */
5423 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
5425 p += xsnprintf (p, endp - p, ":");
5426 p = write_ptid (p, endp, nptid);
5428 else if (!ptid_equal (ptid, minus_one_ptid))
5430 p += xsnprintf (p, endp - p, ":");
5431 p = write_ptid (p, endp, ptid);
5437 /* Clear the thread's private info on resume. */
5440 resume_clear_thread_private_info (struct thread_info *thread)
5442 if (thread->priv != NULL)
5444 thread->priv->stop_reason = TARGET_STOPPED_BY_NO_REASON;
5445 thread->priv->watch_data_address = 0;
5449 /* Append a vCont continue-with-signal action for threads that have a
5450 non-zero stop signal. */
5453 append_pending_thread_resumptions (char *p, char *endp, ptid_t ptid)
5455 struct thread_info *thread;
5457 ALL_NON_EXITED_THREADS (thread)
5458 if (ptid_match (thread->ptid, ptid)
5459 && !ptid_equal (inferior_ptid, thread->ptid)
5460 && thread->suspend.stop_signal != GDB_SIGNAL_0)
5462 p = append_resumption (p, endp, thread->ptid,
5463 0, thread->suspend.stop_signal);
5464 thread->suspend.stop_signal = GDB_SIGNAL_0;
5465 resume_clear_thread_private_info (thread);
5471 /* Resume the remote inferior by using a "vCont" packet. The thread
5472 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5473 resumed thread should be single-stepped and/or signalled. If PTID
5474 equals minus_one_ptid, then all threads are resumed; the thread to
5475 be stepped and/or signalled is given in the global INFERIOR_PTID.
5476 This function returns non-zero iff it resumes the inferior.
5478 This function issues a strict subset of all possible vCont commands at the
5482 remote_vcont_resume (ptid_t ptid, int step, enum gdb_signal siggnal)
5484 struct remote_state *rs = get_remote_state ();
5488 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
5489 remote_vcont_probe (rs);
5491 if (packet_support (PACKET_vCont) == PACKET_DISABLE)
5495 endp = rs->buf + get_remote_packet_size ();
5497 /* If we could generate a wider range of packets, we'd have to worry
5498 about overflowing BUF. Should there be a generic
5499 "multi-part-packet" packet? */
5501 p += xsnprintf (p, endp - p, "vCont");
5503 if (ptid_equal (ptid, magic_null_ptid))
5505 /* MAGIC_NULL_PTID means that we don't have any active threads,
5506 so we don't have any TID numbers the inferior will
5507 understand. Make sure to only send forms that do not specify
5509 append_resumption (p, endp, minus_one_ptid, step, siggnal);
5511 else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
5513 /* Resume all threads (of all processes, or of a single
5514 process), with preference for INFERIOR_PTID. This assumes
5515 inferior_ptid belongs to the set of all threads we are about
5517 if (step || siggnal != GDB_SIGNAL_0)
5519 /* Step inferior_ptid, with or without signal. */
5520 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
5523 /* Also pass down any pending signaled resumption for other
5524 threads not the current. */
5525 p = append_pending_thread_resumptions (p, endp, ptid);
5527 /* And continue others without a signal. */
5528 append_resumption (p, endp, ptid, /*step=*/ 0, GDB_SIGNAL_0);
5532 /* Scheduler locking; resume only PTID. */
5533 append_resumption (p, endp, ptid, step, siggnal);
5536 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
5539 if (target_is_non_stop_p ())
5541 /* In non-stop, the stub replies to vCont with "OK". The stop
5542 reply will be reported asynchronously by means of a `%Stop'
5544 getpkt (&rs->buf, &rs->buf_size, 0);
5545 if (strcmp (rs->buf, "OK") != 0)
5546 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
5552 /* Tell the remote machine to resume. */
5555 remote_resume (struct target_ops *ops,
5556 ptid_t ptid, int step, enum gdb_signal siggnal)
5558 struct remote_state *rs = get_remote_state ();
5560 struct thread_info *thread;
5562 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5563 (explained in remote-notif.c:handle_notification) so
5564 remote_notif_process is not called. We need find a place where
5565 it is safe to start a 'vNotif' sequence. It is good to do it
5566 before resuming inferior, because inferior was stopped and no RSP
5567 traffic at that moment. */
5568 if (!target_is_non_stop_p ())
5569 remote_notif_process (rs->notif_state, ¬if_client_stop);
5571 rs->last_sent_signal = siggnal;
5572 rs->last_sent_step = step;
5574 /* The vCont packet doesn't need to specify threads via Hc. */
5575 /* No reverse support (yet) for vCont. */
5576 if (execution_direction != EXEC_REVERSE)
5577 if (remote_vcont_resume (ptid, step, siggnal))
5580 /* All other supported resume packets do use Hc, so set the continue
5582 if (ptid_equal (ptid, minus_one_ptid))
5583 set_continue_thread (any_thread_ptid);
5585 set_continue_thread (ptid);
5587 ALL_NON_EXITED_THREADS (thread)
5588 resume_clear_thread_private_info (thread);
5591 if (execution_direction == EXEC_REVERSE)
5593 /* We don't pass signals to the target in reverse exec mode. */
5594 if (info_verbose && siggnal != GDB_SIGNAL_0)
5595 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5598 if (step && packet_support (PACKET_bs) == PACKET_DISABLE)
5599 error (_("Remote reverse-step not supported."));
5600 if (!step && packet_support (PACKET_bc) == PACKET_DISABLE)
5601 error (_("Remote reverse-continue not supported."));
5603 strcpy (buf, step ? "bs" : "bc");
5605 else if (siggnal != GDB_SIGNAL_0)
5607 buf[0] = step ? 'S' : 'C';
5608 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
5609 buf[2] = tohex (((int) siggnal) & 0xf);
5613 strcpy (buf, step ? "s" : "c");
5618 /* We are about to start executing the inferior, let's register it
5619 with the event loop. NOTE: this is the one place where all the
5620 execution commands end up. We could alternatively do this in each
5621 of the execution commands in infcmd.c. */
5622 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5623 into infcmd.c in order to allow inferior function calls to work
5624 NOT asynchronously. */
5625 if (target_can_async_p ())
5628 /* We've just told the target to resume. The remote server will
5629 wait for the inferior to stop, and then send a stop reply. In
5630 the mean time, we can't start another command/query ourselves
5631 because the stub wouldn't be ready to process it. This applies
5632 only to the base all-stop protocol, however. In non-stop (which
5633 only supports vCont), the stub replies with an "OK", and is
5634 immediate able to process further serial input. */
5635 if (!target_is_non_stop_p ())
5636 rs->waiting_for_stop_reply = 1;
5640 /* Set up the signal handler for SIGINT, while the target is
5641 executing, ovewriting the 'regular' SIGINT signal handler. */
5643 async_initialize_sigint_signal_handler (void)
5645 signal (SIGINT, async_handle_remote_sigint);
5648 /* Signal handler for SIGINT, while the target is executing. */
5650 async_handle_remote_sigint (int sig)
5652 signal (sig, async_handle_remote_sigint_twice);
5653 /* Note we need to go through gdb_call_async_signal_handler in order
5654 to wake up the event loop on Windows. */
5655 gdb_call_async_signal_handler (async_sigint_remote_token, 0);
5658 /* Signal handler for SIGINT, installed after SIGINT has already been
5659 sent once. It will take effect the second time that the user sends
5662 async_handle_remote_sigint_twice (int sig)
5664 signal (sig, async_handle_remote_sigint);
5665 /* See note in async_handle_remote_sigint. */
5666 gdb_call_async_signal_handler (async_sigint_remote_twice_token, 0);
5669 /* Implementation of to_check_pending_interrupt. */
5672 remote_check_pending_interrupt (struct target_ops *self)
5674 struct async_signal_handler *token = async_sigint_remote_twice_token;
5676 if (async_signal_handler_is_marked (token))
5678 clear_async_signal_handler (token);
5679 call_async_signal_handler (token);
5683 /* Perform the real interruption of the target execution, in response
5686 async_remote_interrupt (gdb_client_data arg)
5689 fprintf_unfiltered (gdb_stdlog, "async_remote_interrupt called\n");
5691 target_interrupt (inferior_ptid);
5694 /* Perform interrupt, if the first attempt did not succeed. Just give
5695 up on the target alltogether. */
5697 async_remote_interrupt_twice (gdb_client_data arg)
5700 fprintf_unfiltered (gdb_stdlog, "async_remote_interrupt_twice called\n");
5705 /* Reinstall the usual SIGINT handlers, after the target has
5708 async_cleanup_sigint_signal_handler (void *dummy)
5710 signal (SIGINT, handle_sigint);
5713 /* Send ^C to target to halt it. Target will respond, and send us a
5715 static void (*ofunc) (int);
5717 /* The command line interface's interrupt routine. This function is installed
5718 as a signal handler for SIGINT. The first time a user requests an
5719 interrupt, we call remote_interrupt to send a break or ^C. If there is no
5720 response from the target (it didn't stop when the user requested it),
5721 we ask the user if he'd like to detach from the target. */
5724 sync_remote_interrupt (int signo)
5726 /* If this doesn't work, try more severe steps. */
5727 signal (signo, sync_remote_interrupt_twice);
5729 gdb_call_async_signal_handler (async_sigint_remote_token, 1);
5732 /* The user typed ^C twice. */
5735 sync_remote_interrupt_twice (int signo)
5737 signal (signo, ofunc);
5738 gdb_call_async_signal_handler (async_sigint_remote_twice_token, 1);
5739 signal (signo, sync_remote_interrupt);
5742 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
5743 thread, all threads of a remote process, or all threads of all
5747 remote_stop_ns (ptid_t ptid)
5749 struct remote_state *rs = get_remote_state ();
5751 char *endp = rs->buf + get_remote_packet_size ();
5753 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
5754 remote_vcont_probe (rs);
5756 if (!rs->supports_vCont.t)
5757 error (_("Remote server does not support stopping threads"));
5759 if (ptid_equal (ptid, minus_one_ptid)
5760 || (!remote_multi_process_p (rs) && ptid_is_pid (ptid)))
5761 p += xsnprintf (p, endp - p, "vCont;t");
5766 p += xsnprintf (p, endp - p, "vCont;t:");
5768 if (ptid_is_pid (ptid))
5769 /* All (-1) threads of process. */
5770 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
5773 /* Small optimization: if we already have a stop reply for
5774 this thread, no use in telling the stub we want this
5776 if (peek_stop_reply (ptid))
5782 write_ptid (p, endp, nptid);
5785 /* In non-stop, we get an immediate OK reply. The stop reply will
5786 come in asynchronously by notification. */
5788 getpkt (&rs->buf, &rs->buf_size, 0);
5789 if (strcmp (rs->buf, "OK") != 0)
5790 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
5793 /* All-stop version of target_interrupt. Sends a break or a ^C to
5794 interrupt the remote target. It is undefined which thread of which
5795 process reports the interrupt. */
5798 remote_interrupt_as (void)
5800 struct remote_state *rs = get_remote_state ();
5802 rs->ctrlc_pending_p = 1;
5804 /* If the inferior is stopped already, but the core didn't know
5805 about it yet, just ignore the request. The cached wait status
5806 will be collected in remote_wait. */
5807 if (rs->cached_wait_status)
5810 /* Send interrupt_sequence to remote target. */
5811 send_interrupt_sequence ();
5814 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
5815 the remote target. It is undefined which thread of which process
5816 reports the interrupt. Throws an error if the packet is not
5817 supported by the server. */
5820 remote_interrupt_ns (void)
5822 struct remote_state *rs = get_remote_state ();
5824 char *endp = rs->buf + get_remote_packet_size ();
5826 xsnprintf (p, endp - p, "vCtrlC");
5828 /* In non-stop, we get an immediate OK reply. The stop reply will
5829 come in asynchronously by notification. */
5831 getpkt (&rs->buf, &rs->buf_size, 0);
5833 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vCtrlC]))
5837 case PACKET_UNKNOWN:
5838 error (_("No support for interrupting the remote target."));
5840 error (_("Interrupting target failed: %s"), rs->buf);
5844 /* Implement the to_stop function for the remote targets. */
5847 remote_stop (struct target_ops *self, ptid_t ptid)
5850 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
5852 if (target_is_non_stop_p ())
5853 remote_stop_ns (ptid);
5856 /* We don't currently have a way to transparently pause the
5857 remote target in all-stop mode. Interrupt it instead. */
5858 remote_interrupt_as ();
5862 /* Implement the to_interrupt function for the remote targets. */
5865 remote_interrupt (struct target_ops *self, ptid_t ptid)
5867 struct remote_state *rs = get_remote_state ();
5870 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
5872 if (target_is_non_stop_p ())
5873 remote_interrupt_ns ();
5875 remote_interrupt_as ();
5878 /* Ask the user what to do when an interrupt is received. */
5881 interrupt_query (void)
5883 struct remote_state *rs = get_remote_state ();
5884 struct cleanup *old_chain;
5886 old_chain = make_cleanup_restore_target_terminal ();
5887 target_terminal_ours ();
5889 if (rs->waiting_for_stop_reply && rs->ctrlc_pending_p)
5891 if (query (_("The target is not responding to interrupt requests.\n"
5892 "Stop debugging it? ")))
5894 remote_unpush_target ();
5895 throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target."));
5900 if (query (_("Interrupted while waiting for the program.\n"
5901 "Give up waiting? ")))
5905 do_cleanups (old_chain);
5908 /* Enable/disable target terminal ownership. Most targets can use
5909 terminal groups to control terminal ownership. Remote targets are
5910 different in that explicit transfer of ownership to/from GDB/target
5914 remote_terminal_inferior (struct target_ops *self)
5916 if (!target_async_permitted)
5917 /* Nothing to do. */
5920 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
5921 idempotent. The event-loop GDB talking to an asynchronous target
5922 with a synchronous command calls this function from both
5923 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
5924 transfer the terminal to the target when it shouldn't this guard
5926 if (!remote_async_terminal_ours_p)
5928 delete_file_handler (input_fd);
5929 remote_async_terminal_ours_p = 0;
5930 async_initialize_sigint_signal_handler ();
5931 /* NOTE: At this point we could also register our selves as the
5932 recipient of all input. Any characters typed could then be
5933 passed on down to the target. */
5937 remote_terminal_ours (struct target_ops *self)
5939 if (!target_async_permitted)
5940 /* Nothing to do. */
5943 /* See FIXME in remote_terminal_inferior. */
5944 if (remote_async_terminal_ours_p)
5946 async_cleanup_sigint_signal_handler (NULL);
5947 add_file_handler (input_fd, stdin_event_handler, 0);
5948 remote_async_terminal_ours_p = 1;
5952 remote_console_output (char *msg)
5956 for (p = msg; p[0] && p[1]; p += 2)
5959 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
5963 fputs_unfiltered (tb, gdb_stdtarg);
5965 gdb_flush (gdb_stdtarg);
5968 typedef struct cached_reg
5971 gdb_byte data[MAX_REGISTER_SIZE];
5974 DEF_VEC_O(cached_reg_t);
5976 typedef struct stop_reply
5978 struct notif_event base;
5980 /* The identifier of the thread about this event */
5983 /* The remote state this event is associated with. When the remote
5984 connection, represented by a remote_state object, is closed,
5985 all the associated stop_reply events should be released. */
5986 struct remote_state *rs;
5988 struct target_waitstatus ws;
5990 /* Expedited registers. This makes remote debugging a bit more
5991 efficient for those targets that provide critical registers as
5992 part of their normal status mechanism (as another roundtrip to
5993 fetch them is avoided). */
5994 VEC(cached_reg_t) *regcache;
5996 enum target_stop_reason stop_reason;
5998 CORE_ADDR watch_data_address;
6003 DECLARE_QUEUE_P (stop_reply_p);
6004 DEFINE_QUEUE_P (stop_reply_p);
6005 /* The list of already fetched and acknowledged stop events. This
6006 queue is used for notification Stop, and other notifications
6007 don't need queue for their events, because the notification events
6008 of Stop can't be consumed immediately, so that events should be
6009 queued first, and be consumed by remote_wait_{ns,as} one per
6010 time. Other notifications can consume their events immediately,
6011 so queue is not needed for them. */
6012 static QUEUE (stop_reply_p) *stop_reply_queue;
6015 stop_reply_xfree (struct stop_reply *r)
6017 notif_event_xfree ((struct notif_event *) r);
6020 /* Return the length of the stop reply queue. */
6023 stop_reply_queue_length (void)
6025 return QUEUE_length (stop_reply_p, stop_reply_queue);
6029 remote_notif_stop_parse (struct notif_client *self, char *buf,
6030 struct notif_event *event)
6032 remote_parse_stop_reply (buf, (struct stop_reply *) event);
6036 remote_notif_stop_ack (struct notif_client *self, char *buf,
6037 struct notif_event *event)
6039 struct stop_reply *stop_reply = (struct stop_reply *) event;
6042 putpkt ((char *) self->ack_command);
6044 if (stop_reply->ws.kind == TARGET_WAITKIND_IGNORE)
6045 /* We got an unknown stop reply. */
6046 error (_("Unknown stop reply"));
6048 push_stop_reply (stop_reply);
6052 remote_notif_stop_can_get_pending_events (struct notif_client *self)
6054 /* We can't get pending events in remote_notif_process for
6055 notification stop, and we have to do this in remote_wait_ns
6056 instead. If we fetch all queued events from stub, remote stub
6057 may exit and we have no chance to process them back in
6059 mark_async_event_handler (remote_async_inferior_event_token);
6064 stop_reply_dtr (struct notif_event *event)
6066 struct stop_reply *r = (struct stop_reply *) event;
6068 VEC_free (cached_reg_t, r->regcache);
6071 static struct notif_event *
6072 remote_notif_stop_alloc_reply (void)
6074 /* We cast to a pointer to the "base class". */
6075 struct notif_event *r = (struct notif_event *) XNEW (struct stop_reply);
6077 r->dtr = stop_reply_dtr;
6082 /* A client of notification Stop. */
6084 struct notif_client notif_client_stop =
6088 remote_notif_stop_parse,
6089 remote_notif_stop_ack,
6090 remote_notif_stop_can_get_pending_events,
6091 remote_notif_stop_alloc_reply,
6095 /* A parameter to pass data in and out. */
6097 struct queue_iter_param
6100 struct stop_reply *output;
6103 /* Determine if THREAD is a pending fork parent thread. ARG contains
6104 the pid of the process that owns the threads we want to check, or
6105 -1 if we want to check all threads. */
6108 is_pending_fork_parent (struct target_waitstatus *ws, int event_pid,
6111 if (ws->kind == TARGET_WAITKIND_FORKED
6112 || ws->kind == TARGET_WAITKIND_VFORKED)
6114 if (event_pid == -1 || event_pid == ptid_get_pid (thread_ptid))
6121 /* Check whether EVENT is a fork event, and if it is, remove the
6122 fork child from the context list passed in DATA. */
6125 remove_child_of_pending_fork (QUEUE (stop_reply_p) *q,
6126 QUEUE_ITER (stop_reply_p) *iter,
6130 struct queue_iter_param *param = (struct queue_iter_param *) data;
6131 struct threads_listing_context *context
6132 = (struct threads_listing_context *) param->input;
6134 if (event->ws.kind == TARGET_WAITKIND_FORKED
6135 || event->ws.kind == TARGET_WAITKIND_VFORKED
6136 || event->ws.kind == TARGET_WAITKIND_THREAD_EXITED)
6137 threads_listing_context_remove (&event->ws, context);
6142 /* If CONTEXT contains any fork child threads that have not been
6143 reported yet, remove them from the CONTEXT list. If such a
6144 thread exists it is because we are stopped at a fork catchpoint
6145 and have not yet called follow_fork, which will set up the
6146 host-side data structures for the new process. */
6149 remove_new_fork_children (struct threads_listing_context *context)
6151 struct thread_info * thread;
6153 struct notif_client *notif = ¬if_client_stop;
6154 struct queue_iter_param param;
6156 /* For any threads stopped at a fork event, remove the corresponding
6157 fork child threads from the CONTEXT list. */
6158 ALL_NON_EXITED_THREADS (thread)
6160 struct target_waitstatus *ws;
6162 if (thread->suspend.waitstatus_pending_p)
6163 ws = &thread->suspend.waitstatus;
6165 ws = &thread->pending_follow;
6167 if (is_pending_fork_parent (ws, pid, thread->ptid))
6169 threads_listing_context_remove (ws, context);
6173 /* Check for any pending fork events (not reported or processed yet)
6174 in process PID and remove those fork child threads from the
6175 CONTEXT list as well. */
6176 remote_notif_get_pending_events (notif);
6177 param.input = context;
6178 param.output = NULL;
6179 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6180 remove_child_of_pending_fork, ¶m);
6183 /* Remove stop replies in the queue if its pid is equal to the given
6187 remove_stop_reply_for_inferior (QUEUE (stop_reply_p) *q,
6188 QUEUE_ITER (stop_reply_p) *iter,
6192 struct queue_iter_param *param = (struct queue_iter_param *) data;
6193 struct inferior *inf = (struct inferior *) param->input;
6195 if (ptid_get_pid (event->ptid) == inf->pid)
6197 stop_reply_xfree (event);
6198 QUEUE_remove_elem (stop_reply_p, q, iter);
6204 /* Discard all pending stop replies of inferior INF. */
6207 discard_pending_stop_replies (struct inferior *inf)
6209 struct queue_iter_param param;
6210 struct stop_reply *reply;
6211 struct remote_state *rs = get_remote_state ();
6212 struct remote_notif_state *rns = rs->notif_state;
6214 /* This function can be notified when an inferior exists. When the
6215 target is not remote, the notification state is NULL. */
6216 if (rs->remote_desc == NULL)
6219 reply = (struct stop_reply *) rns->pending_event[notif_client_stop.id];
6221 /* Discard the in-flight notification. */
6222 if (reply != NULL && ptid_get_pid (reply->ptid) == inf->pid)
6224 stop_reply_xfree (reply);
6225 rns->pending_event[notif_client_stop.id] = NULL;
6229 param.output = NULL;
6230 /* Discard the stop replies we have already pulled with
6232 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6233 remove_stop_reply_for_inferior, ¶m);
6236 /* If its remote state is equal to the given remote state,
6237 remove EVENT from the stop reply queue. */
6240 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p) *q,
6241 QUEUE_ITER (stop_reply_p) *iter,
6245 struct queue_iter_param *param = (struct queue_iter_param *) data;
6246 struct remote_state *rs = (struct remote_state *) param->input;
6248 if (event->rs == rs)
6250 stop_reply_xfree (event);
6251 QUEUE_remove_elem (stop_reply_p, q, iter);
6257 /* Discard the stop replies for RS in stop_reply_queue. */
6260 discard_pending_stop_replies_in_queue (struct remote_state *rs)
6262 struct queue_iter_param param;
6265 param.output = NULL;
6266 /* Discard the stop replies we have already pulled with
6268 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6269 remove_stop_reply_of_remote_state, ¶m);
6272 /* A parameter to pass data in and out. */
6275 remote_notif_remove_once_on_match (QUEUE (stop_reply_p) *q,
6276 QUEUE_ITER (stop_reply_p) *iter,
6280 struct queue_iter_param *param = (struct queue_iter_param *) data;
6281 ptid_t *ptid = (ptid_t *) param->input;
6283 if (ptid_match (event->ptid, *ptid))
6285 param->output = event;
6286 QUEUE_remove_elem (stop_reply_p, q, iter);
6293 /* Remove the first reply in 'stop_reply_queue' which matches
6296 static struct stop_reply *
6297 remote_notif_remove_queued_reply (ptid_t ptid)
6299 struct queue_iter_param param;
6301 param.input = &ptid;
6302 param.output = NULL;
6304 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6305 remote_notif_remove_once_on_match, ¶m);
6307 fprintf_unfiltered (gdb_stdlog,
6308 "notif: discard queued event: 'Stop' in %s\n",
6309 target_pid_to_str (ptid));
6311 return param.output;
6314 /* Look for a queued stop reply belonging to PTID. If one is found,
6315 remove it from the queue, and return it. Returns NULL if none is
6316 found. If there are still queued events left to process, tell the
6317 event loop to get back to target_wait soon. */
6319 static struct stop_reply *
6320 queued_stop_reply (ptid_t ptid)
6322 struct stop_reply *r = remote_notif_remove_queued_reply (ptid);
6324 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
6325 /* There's still at least an event left. */
6326 mark_async_event_handler (remote_async_inferior_event_token);
6331 /* Push a fully parsed stop reply in the stop reply queue. Since we
6332 know that we now have at least one queued event left to pass to the
6333 core side, tell the event loop to get back to target_wait soon. */
6336 push_stop_reply (struct stop_reply *new_event)
6338 QUEUE_enque (stop_reply_p, stop_reply_queue, new_event);
6341 fprintf_unfiltered (gdb_stdlog,
6342 "notif: push 'Stop' %s to queue %d\n",
6343 target_pid_to_str (new_event->ptid),
6344 QUEUE_length (stop_reply_p,
6347 mark_async_event_handler (remote_async_inferior_event_token);
6351 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p) *q,
6352 QUEUE_ITER (stop_reply_p) *iter,
6353 struct stop_reply *event,
6356 ptid_t *ptid = (ptid_t *) data;
6358 return !(ptid_equal (*ptid, event->ptid)
6359 && event->ws.kind == TARGET_WAITKIND_STOPPED);
6362 /* Returns true if we have a stop reply for PTID. */
6365 peek_stop_reply (ptid_t ptid)
6367 return !QUEUE_iterate (stop_reply_p, stop_reply_queue,
6368 stop_reply_match_ptid_and_ws, &ptid);
6371 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6372 starting with P and ending with PEND matches PREFIX. */
6375 strprefix (const char *p, const char *pend, const char *prefix)
6377 for ( ; p < pend; p++, prefix++)
6380 return *prefix == '\0';
6383 /* Parse the stop reply in BUF. Either the function succeeds, and the
6384 result is stored in EVENT, or throws an error. */
6387 remote_parse_stop_reply (char *buf, struct stop_reply *event)
6389 struct remote_arch_state *rsa = get_remote_arch_state ();
6394 event->ptid = null_ptid;
6395 event->rs = get_remote_state ();
6396 event->ws.kind = TARGET_WAITKIND_IGNORE;
6397 event->ws.value.integer = 0;
6398 event->stop_reason = TARGET_STOPPED_BY_NO_REASON;
6399 event->regcache = NULL;
6404 case 'T': /* Status with PC, SP, FP, ... */
6405 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6406 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6408 n... = register number
6409 r... = register contents
6412 p = &buf[3]; /* after Txx */
6418 p1 = strchr (p, ':');
6420 error (_("Malformed packet(a) (missing colon): %s\n\
6424 error (_("Malformed packet(a) (missing register number): %s\n\
6428 /* Some "registers" are actually extended stop information.
6429 Note if you're adding a new entry here: GDB 7.9 and
6430 earlier assume that all register "numbers" that start
6431 with an hex digit are real register numbers. Make sure
6432 the server only sends such a packet if it knows the
6433 client understands it. */
6435 if (strprefix (p, p1, "thread"))
6436 event->ptid = read_ptid (++p1, &p);
6437 else if (strprefix (p, p1, "syscall_entry"))
6441 event->ws.kind = TARGET_WAITKIND_SYSCALL_ENTRY;
6442 p = unpack_varlen_hex (++p1, &sysno);
6443 event->ws.value.syscall_number = (int) sysno;
6445 else if (strprefix (p, p1, "syscall_return"))
6449 event->ws.kind = TARGET_WAITKIND_SYSCALL_RETURN;
6450 p = unpack_varlen_hex (++p1, &sysno);
6451 event->ws.value.syscall_number = (int) sysno;
6453 else if (strprefix (p, p1, "watch")
6454 || strprefix (p, p1, "rwatch")
6455 || strprefix (p, p1, "awatch"))
6457 event->stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
6458 p = unpack_varlen_hex (++p1, &addr);
6459 event->watch_data_address = (CORE_ADDR) addr;
6461 else if (strprefix (p, p1, "swbreak"))
6463 event->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT;
6465 /* Make sure the stub doesn't forget to indicate support
6467 if (packet_support (PACKET_swbreak_feature) != PACKET_ENABLE)
6468 error (_("Unexpected swbreak stop reason"));
6470 /* The value part is documented as "must be empty",
6471 though we ignore it, in case we ever decide to make
6472 use of it in a backward compatible way. */
6473 p = strchrnul (p1 + 1, ';');
6475 else if (strprefix (p, p1, "hwbreak"))
6477 event->stop_reason = TARGET_STOPPED_BY_HW_BREAKPOINT;
6479 /* Make sure the stub doesn't forget to indicate support
6481 if (packet_support (PACKET_hwbreak_feature) != PACKET_ENABLE)
6482 error (_("Unexpected hwbreak stop reason"));
6485 p = strchrnul (p1 + 1, ';');
6487 else if (strprefix (p, p1, "library"))
6489 event->ws.kind = TARGET_WAITKIND_LOADED;
6490 p = strchrnul (p1 + 1, ';');
6492 else if (strprefix (p, p1, "replaylog"))
6494 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
6495 /* p1 will indicate "begin" or "end", but it makes
6496 no difference for now, so ignore it. */
6497 p = strchrnul (p1 + 1, ';');
6499 else if (strprefix (p, p1, "core"))
6503 p = unpack_varlen_hex (++p1, &c);
6506 else if (strprefix (p, p1, "fork"))
6508 event->ws.value.related_pid = read_ptid (++p1, &p);
6509 event->ws.kind = TARGET_WAITKIND_FORKED;
6511 else if (strprefix (p, p1, "vfork"))
6513 event->ws.value.related_pid = read_ptid (++p1, &p);
6514 event->ws.kind = TARGET_WAITKIND_VFORKED;
6516 else if (strprefix (p, p1, "vforkdone"))
6518 event->ws.kind = TARGET_WAITKIND_VFORK_DONE;
6519 p = strchrnul (p1 + 1, ';');
6521 else if (strprefix (p, p1, "exec"))
6524 char pathname[PATH_MAX];
6527 /* Determine the length of the execd pathname. */
6528 p = unpack_varlen_hex (++p1, &ignored);
6529 pathlen = (p - p1) / 2;
6531 /* Save the pathname for event reporting and for
6532 the next run command. */
6533 hex2bin (p1, (gdb_byte *) pathname, pathlen);
6534 pathname[pathlen] = '\0';
6536 /* This is freed during event handling. */
6537 event->ws.value.execd_pathname = xstrdup (pathname);
6538 event->ws.kind = TARGET_WAITKIND_EXECD;
6540 /* Skip the registers included in this packet, since
6541 they may be for an architecture different from the
6542 one used by the original program. */
6545 else if (strprefix (p, p1, "create"))
6547 event->ws.kind = TARGET_WAITKIND_THREAD_CREATED;
6548 p = strchrnul (p1 + 1, ';');
6557 p = strchrnul (p1 + 1, ';');
6562 /* Maybe a real ``P'' register number. */
6563 p_temp = unpack_varlen_hex (p, &pnum);
6564 /* If the first invalid character is the colon, we got a
6565 register number. Otherwise, it's an unknown stop
6569 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
6570 cached_reg_t cached_reg;
6573 error (_("Remote sent bad register number %s: %s\n\
6575 hex_string (pnum), p, buf);
6577 cached_reg.num = reg->regnum;
6580 fieldsize = hex2bin (p, cached_reg.data,
6581 register_size (target_gdbarch (),
6584 if (fieldsize < register_size (target_gdbarch (),
6586 warning (_("Remote reply is too short: %s"), buf);
6588 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
6592 /* Not a number. Silently skip unknown optional
6594 p = strchrnul (p1 + 1, ';');
6599 error (_("Remote register badly formatted: %s\nhere: %s"),
6604 if (event->ws.kind != TARGET_WAITKIND_IGNORE)
6608 case 'S': /* Old style status, just signal only. */
6612 event->ws.kind = TARGET_WAITKIND_STOPPED;
6613 sig = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
6614 if (GDB_SIGNAL_FIRST <= sig && sig < GDB_SIGNAL_LAST)
6615 event->ws.value.sig = (enum gdb_signal) sig;
6617 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
6620 case 'w': /* Thread exited. */
6625 event->ws.kind = TARGET_WAITKIND_THREAD_EXITED;
6626 p = unpack_varlen_hex (&buf[1], &value);
6627 event->ws.value.integer = value;
6629 error (_("stop reply packet badly formatted: %s"), buf);
6630 event->ptid = read_ptid (++p, NULL);
6633 case 'W': /* Target exited. */
6640 /* GDB used to accept only 2 hex chars here. Stubs should
6641 only send more if they detect GDB supports multi-process
6643 p = unpack_varlen_hex (&buf[1], &value);
6647 /* The remote process exited. */
6648 event->ws.kind = TARGET_WAITKIND_EXITED;
6649 event->ws.value.integer = value;
6653 /* The remote process exited with a signal. */
6654 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
6655 if (GDB_SIGNAL_FIRST <= value && value < GDB_SIGNAL_LAST)
6656 event->ws.value.sig = (enum gdb_signal) value;
6658 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
6661 /* If no process is specified, assume inferior_ptid. */
6662 pid = ptid_get_pid (inferior_ptid);
6671 else if (startswith (p, "process:"))
6675 p += sizeof ("process:") - 1;
6676 unpack_varlen_hex (p, &upid);
6680 error (_("unknown stop reply packet: %s"), buf);
6683 error (_("unknown stop reply packet: %s"), buf);
6684 event->ptid = pid_to_ptid (pid);
6688 event->ws.kind = TARGET_WAITKIND_NO_RESUMED;
6689 event->ptid = minus_one_ptid;
6693 if (target_is_non_stop_p () && ptid_equal (event->ptid, null_ptid))
6694 error (_("No process or thread specified in stop reply: %s"), buf);
6697 /* When the stub wants to tell GDB about a new notification reply, it
6698 sends a notification (%Stop, for example). Those can come it at
6699 any time, hence, we have to make sure that any pending
6700 putpkt/getpkt sequence we're making is finished, before querying
6701 the stub for more events with the corresponding ack command
6702 (vStopped, for example). E.g., if we started a vStopped sequence
6703 immediately upon receiving the notification, something like this
6711 1.6) <-- (registers reply to step #1.3)
6713 Obviously, the reply in step #1.6 would be unexpected to a vStopped
6716 To solve this, whenever we parse a %Stop notification successfully,
6717 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
6718 doing whatever we were doing:
6724 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
6725 2.5) <-- (registers reply to step #2.3)
6727 Eventualy after step #2.5, we return to the event loop, which
6728 notices there's an event on the
6729 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
6730 associated callback --- the function below. At this point, we're
6731 always safe to start a vStopped sequence. :
6734 2.7) <-- T05 thread:2
6740 remote_notif_get_pending_events (struct notif_client *nc)
6742 struct remote_state *rs = get_remote_state ();
6744 if (rs->notif_state->pending_event[nc->id] != NULL)
6747 fprintf_unfiltered (gdb_stdlog,
6748 "notif: process: '%s' ack pending event\n",
6752 nc->ack (nc, rs->buf, rs->notif_state->pending_event[nc->id]);
6753 rs->notif_state->pending_event[nc->id] = NULL;
6757 getpkt (&rs->buf, &rs->buf_size, 0);
6758 if (strcmp (rs->buf, "OK") == 0)
6761 remote_notif_ack (nc, rs->buf);
6767 fprintf_unfiltered (gdb_stdlog,
6768 "notif: process: '%s' no pending reply\n",
6773 /* Called when it is decided that STOP_REPLY holds the info of the
6774 event that is to be returned to the core. This function always
6775 destroys STOP_REPLY. */
6778 process_stop_reply (struct stop_reply *stop_reply,
6779 struct target_waitstatus *status)
6783 *status = stop_reply->ws;
6784 ptid = stop_reply->ptid;
6786 /* If no thread/process was reported by the stub, assume the current
6788 if (ptid_equal (ptid, null_ptid))
6789 ptid = inferior_ptid;
6791 if (status->kind != TARGET_WAITKIND_EXITED
6792 && status->kind != TARGET_WAITKIND_SIGNALLED
6793 && status->kind != TARGET_WAITKIND_NO_RESUMED)
6795 struct private_thread_info *remote_thr;
6797 /* Expedited registers. */
6798 if (stop_reply->regcache)
6800 struct regcache *regcache
6801 = get_thread_arch_regcache (ptid, target_gdbarch ());
6806 VEC_iterate(cached_reg_t, stop_reply->regcache, ix, reg);
6808 regcache_raw_supply (regcache, reg->num, reg->data);
6809 VEC_free (cached_reg_t, stop_reply->regcache);
6812 remote_notice_new_inferior (ptid, 0);
6813 remote_thr = demand_private_info (ptid);
6814 remote_thr->core = stop_reply->core;
6815 remote_thr->stop_reason = stop_reply->stop_reason;
6816 remote_thr->watch_data_address = stop_reply->watch_data_address;
6819 stop_reply_xfree (stop_reply);
6823 /* The non-stop mode version of target_wait. */
6826 remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
6828 struct remote_state *rs = get_remote_state ();
6829 struct stop_reply *stop_reply;
6833 /* If in non-stop mode, get out of getpkt even if a
6834 notification is received. */
6836 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
6837 0 /* forever */, &is_notif);
6840 if (ret != -1 && !is_notif)
6843 case 'E': /* Error of some sort. */
6844 /* We're out of sync with the target now. Did it continue
6845 or not? We can't tell which thread it was in non-stop,
6846 so just ignore this. */
6847 warning (_("Remote failure reply: %s"), rs->buf);
6849 case 'O': /* Console output. */
6850 remote_console_output (rs->buf + 1);
6853 warning (_("Invalid remote reply: %s"), rs->buf);
6857 /* Acknowledge a pending stop reply that may have arrived in the
6859 if (rs->notif_state->pending_event[notif_client_stop.id] != NULL)
6860 remote_notif_get_pending_events (¬if_client_stop);
6862 /* If indeed we noticed a stop reply, we're done. */
6863 stop_reply = queued_stop_reply (ptid);
6864 if (stop_reply != NULL)
6865 return process_stop_reply (stop_reply, status);
6867 /* Still no event. If we're just polling for an event, then
6868 return to the event loop. */
6869 if (options & TARGET_WNOHANG)
6871 status->kind = TARGET_WAITKIND_IGNORE;
6872 return minus_one_ptid;
6875 /* Otherwise do a blocking wait. */
6876 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
6877 1 /* forever */, &is_notif);
6881 /* Wait until the remote machine stops, then return, storing status in
6882 STATUS just as `wait' would. */
6885 remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options)
6887 struct remote_state *rs = get_remote_state ();
6888 ptid_t event_ptid = null_ptid;
6890 struct stop_reply *stop_reply;
6894 status->kind = TARGET_WAITKIND_IGNORE;
6895 status->value.integer = 0;
6897 stop_reply = queued_stop_reply (ptid);
6898 if (stop_reply != NULL)
6899 return process_stop_reply (stop_reply, status);
6901 if (rs->cached_wait_status)
6902 /* Use the cached wait status, but only once. */
6903 rs->cached_wait_status = 0;
6908 int forever = ((options & TARGET_WNOHANG) == 0
6909 && wait_forever_enabled_p);
6911 if (!rs->waiting_for_stop_reply)
6913 status->kind = TARGET_WAITKIND_NO_RESUMED;
6914 return minus_one_ptid;
6917 if (!target_is_async_p ())
6919 ofunc = signal (SIGINT, sync_remote_interrupt);
6920 /* If the user hit C-c before this packet, or between packets,
6921 pretend that it was hit right here. */
6922 if (check_quit_flag ())
6923 sync_remote_interrupt (SIGINT);
6926 /* FIXME: cagney/1999-09-27: If we're in async mode we should
6927 _never_ wait for ever -> test on target_is_async_p().
6928 However, before we do that we need to ensure that the caller
6929 knows how to take the target into/out of async mode. */
6930 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
6931 forever, &is_notif);
6933 if (!target_is_async_p ())
6934 signal (SIGINT, ofunc);
6936 /* GDB gets a notification. Return to core as this event is
6938 if (ret != -1 && is_notif)
6939 return minus_one_ptid;
6941 if (ret == -1 && (options & TARGET_WNOHANG) != 0)
6942 return minus_one_ptid;
6947 /* Assume that the target has acknowledged Ctrl-C unless we receive
6948 an 'F' or 'O' packet. */
6949 if (buf[0] != 'F' && buf[0] != 'O')
6950 rs->ctrlc_pending_p = 0;
6954 case 'E': /* Error of some sort. */
6955 /* We're out of sync with the target now. Did it continue or
6956 not? Not is more likely, so report a stop. */
6957 rs->waiting_for_stop_reply = 0;
6959 warning (_("Remote failure reply: %s"), buf);
6960 status->kind = TARGET_WAITKIND_STOPPED;
6961 status->value.sig = GDB_SIGNAL_0;
6963 case 'F': /* File-I/O request. */
6964 /* GDB may access the inferior memory while handling the File-I/O
6965 request, but we don't want GDB accessing memory while waiting
6966 for a stop reply. See the comments in putpkt_binary. Set
6967 waiting_for_stop_reply to 0 temporarily. */
6968 rs->waiting_for_stop_reply = 0;
6969 remote_fileio_request (buf, rs->ctrlc_pending_p);
6970 rs->ctrlc_pending_p = 0;
6971 /* GDB handled the File-I/O request, and the target is running
6972 again. Keep waiting for events. */
6973 rs->waiting_for_stop_reply = 1;
6975 case 'N': case 'T': case 'S': case 'X': case 'W':
6977 struct stop_reply *stop_reply;
6979 /* There is a stop reply to handle. */
6980 rs->waiting_for_stop_reply = 0;
6983 = (struct stop_reply *) remote_notif_parse (¬if_client_stop,
6986 event_ptid = process_stop_reply (stop_reply, status);
6989 case 'O': /* Console output. */
6990 remote_console_output (buf + 1);
6993 if (rs->last_sent_signal != GDB_SIGNAL_0)
6995 /* Zero length reply means that we tried 'S' or 'C' and the
6996 remote system doesn't support it. */
6997 target_terminal_ours_for_output ();
6999 ("Can't send signals to this remote system. %s not sent.\n",
7000 gdb_signal_to_name (rs->last_sent_signal));
7001 rs->last_sent_signal = GDB_SIGNAL_0;
7002 target_terminal_inferior ();
7004 strcpy ((char *) buf, rs->last_sent_step ? "s" : "c");
7005 putpkt ((char *) buf);
7008 /* else fallthrough */
7010 warning (_("Invalid remote reply: %s"), buf);
7014 if (status->kind == TARGET_WAITKIND_NO_RESUMED)
7015 return minus_one_ptid;
7016 else if (status->kind == TARGET_WAITKIND_IGNORE)
7018 /* Nothing interesting happened. If we're doing a non-blocking
7019 poll, we're done. Otherwise, go back to waiting. */
7020 if (options & TARGET_WNOHANG)
7021 return minus_one_ptid;
7025 else if (status->kind != TARGET_WAITKIND_EXITED
7026 && status->kind != TARGET_WAITKIND_SIGNALLED)
7028 if (!ptid_equal (event_ptid, null_ptid))
7029 record_currthread (rs, event_ptid);
7031 event_ptid = inferior_ptid;
7034 /* A process exit. Invalidate our notion of current thread. */
7035 record_currthread (rs, minus_one_ptid);
7040 /* Wait until the remote machine stops, then return, storing status in
7041 STATUS just as `wait' would. */
7044 remote_wait (struct target_ops *ops,
7045 ptid_t ptid, struct target_waitstatus *status, int options)
7049 if (target_is_non_stop_p ())
7050 event_ptid = remote_wait_ns (ptid, status, options);
7052 event_ptid = remote_wait_as (ptid, status, options);
7054 if (target_is_async_p ())
7056 /* If there are are events left in the queue tell the event loop
7058 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
7059 mark_async_event_handler (remote_async_inferior_event_token);
7065 /* Fetch a single register using a 'p' packet. */
7068 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
7070 struct remote_state *rs = get_remote_state ();
7072 char regp[MAX_REGISTER_SIZE];
7075 if (packet_support (PACKET_p) == PACKET_DISABLE)
7078 if (reg->pnum == -1)
7083 p += hexnumstr (p, reg->pnum);
7086 getpkt (&rs->buf, &rs->buf_size, 0);
7090 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
7094 case PACKET_UNKNOWN:
7097 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7098 gdbarch_register_name (get_regcache_arch (regcache),
7103 /* If this register is unfetchable, tell the regcache. */
7106 regcache_raw_supply (regcache, reg->regnum, NULL);
7110 /* Otherwise, parse and supply the value. */
7116 error (_("fetch_register_using_p: early buf termination"));
7118 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
7121 regcache_raw_supply (regcache, reg->regnum, regp);
7125 /* Fetch the registers included in the target's 'g' packet. */
7128 send_g_packet (void)
7130 struct remote_state *rs = get_remote_state ();
7133 xsnprintf (rs->buf, get_remote_packet_size (), "g");
7134 remote_send (&rs->buf, &rs->buf_size);
7136 /* We can get out of synch in various cases. If the first character
7137 in the buffer is not a hex character, assume that has happened
7138 and try to fetch another packet to read. */
7139 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
7140 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
7141 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
7142 && rs->buf[0] != 'x') /* New: unavailable register value. */
7145 fprintf_unfiltered (gdb_stdlog,
7146 "Bad register packet; fetching a new packet\n");
7147 getpkt (&rs->buf, &rs->buf_size, 0);
7150 buf_len = strlen (rs->buf);
7152 /* Sanity check the received packet. */
7153 if (buf_len % 2 != 0)
7154 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
7160 process_g_packet (struct regcache *regcache)
7162 struct gdbarch *gdbarch = get_regcache_arch (regcache);
7163 struct remote_state *rs = get_remote_state ();
7164 struct remote_arch_state *rsa = get_remote_arch_state ();
7169 buf_len = strlen (rs->buf);
7171 /* Further sanity checks, with knowledge of the architecture. */
7172 if (buf_len > 2 * rsa->sizeof_g_packet)
7173 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
7175 /* Save the size of the packet sent to us by the target. It is used
7176 as a heuristic when determining the max size of packets that the
7177 target can safely receive. */
7178 if (rsa->actual_register_packet_size == 0)
7179 rsa->actual_register_packet_size = buf_len;
7181 /* If this is smaller than we guessed the 'g' packet would be,
7182 update our records. A 'g' reply that doesn't include a register's
7183 value implies either that the register is not available, or that
7184 the 'p' packet must be used. */
7185 if (buf_len < 2 * rsa->sizeof_g_packet)
7187 rsa->sizeof_g_packet = buf_len / 2;
7189 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
7191 if (rsa->regs[i].pnum == -1)
7194 if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
7195 rsa->regs[i].in_g_packet = 0;
7197 rsa->regs[i].in_g_packet = 1;
7201 regs = (char *) alloca (rsa->sizeof_g_packet);
7203 /* Unimplemented registers read as all bits zero. */
7204 memset (regs, 0, rsa->sizeof_g_packet);
7206 /* Reply describes registers byte by byte, each byte encoded as two
7207 hex characters. Suck them all up, then supply them to the
7208 register cacheing/storage mechanism. */
7211 for (i = 0; i < rsa->sizeof_g_packet; i++)
7213 if (p[0] == 0 || p[1] == 0)
7214 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7215 internal_error (__FILE__, __LINE__,
7216 _("unexpected end of 'g' packet reply"));
7218 if (p[0] == 'x' && p[1] == 'x')
7219 regs[i] = 0; /* 'x' */
7221 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
7225 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
7227 struct packet_reg *r = &rsa->regs[i];
7231 if (r->offset * 2 >= strlen (rs->buf))
7232 /* This shouldn't happen - we adjusted in_g_packet above. */
7233 internal_error (__FILE__, __LINE__,
7234 _("unexpected end of 'g' packet reply"));
7235 else if (rs->buf[r->offset * 2] == 'x')
7237 gdb_assert (r->offset * 2 < strlen (rs->buf));
7238 /* The register isn't available, mark it as such (at
7239 the same time setting the value to zero). */
7240 regcache_raw_supply (regcache, r->regnum, NULL);
7243 regcache_raw_supply (regcache, r->regnum,
7250 fetch_registers_using_g (struct regcache *regcache)
7253 process_g_packet (regcache);
7256 /* Make the remote selected traceframe match GDB's selected
7260 set_remote_traceframe (void)
7263 struct remote_state *rs = get_remote_state ();
7265 if (rs->remote_traceframe_number == get_traceframe_number ())
7268 /* Avoid recursion, remote_trace_find calls us again. */
7269 rs->remote_traceframe_number = get_traceframe_number ();
7271 newnum = target_trace_find (tfind_number,
7272 get_traceframe_number (), 0, 0, NULL);
7274 /* Should not happen. If it does, all bets are off. */
7275 if (newnum != get_traceframe_number ())
7276 warning (_("could not set remote traceframe"));
7280 remote_fetch_registers (struct target_ops *ops,
7281 struct regcache *regcache, int regnum)
7283 struct remote_arch_state *rsa = get_remote_arch_state ();
7286 set_remote_traceframe ();
7287 set_general_thread (inferior_ptid);
7291 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
7293 gdb_assert (reg != NULL);
7295 /* If this register might be in the 'g' packet, try that first -
7296 we are likely to read more than one register. If this is the
7297 first 'g' packet, we might be overly optimistic about its
7298 contents, so fall back to 'p'. */
7299 if (reg->in_g_packet)
7301 fetch_registers_using_g (regcache);
7302 if (reg->in_g_packet)
7306 if (fetch_register_using_p (regcache, reg))
7309 /* This register is not available. */
7310 regcache_raw_supply (regcache, reg->regnum, NULL);
7315 fetch_registers_using_g (regcache);
7317 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7318 if (!rsa->regs[i].in_g_packet)
7319 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
7321 /* This register is not available. */
7322 regcache_raw_supply (regcache, i, NULL);
7326 /* Prepare to store registers. Since we may send them all (using a
7327 'G' request), we have to read out the ones we don't want to change
7331 remote_prepare_to_store (struct target_ops *self, struct regcache *regcache)
7333 struct remote_arch_state *rsa = get_remote_arch_state ();
7335 gdb_byte buf[MAX_REGISTER_SIZE];
7337 /* Make sure the entire registers array is valid. */
7338 switch (packet_support (PACKET_P))
7340 case PACKET_DISABLE:
7341 case PACKET_SUPPORT_UNKNOWN:
7342 /* Make sure all the necessary registers are cached. */
7343 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7344 if (rsa->regs[i].in_g_packet)
7345 regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
7352 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7353 packet was not recognized. */
7356 store_register_using_P (const struct regcache *regcache,
7357 struct packet_reg *reg)
7359 struct gdbarch *gdbarch = get_regcache_arch (regcache);
7360 struct remote_state *rs = get_remote_state ();
7361 /* Try storing a single register. */
7362 char *buf = rs->buf;
7363 gdb_byte regp[MAX_REGISTER_SIZE];
7366 if (packet_support (PACKET_P) == PACKET_DISABLE)
7369 if (reg->pnum == -1)
7372 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
7373 p = buf + strlen (buf);
7374 regcache_raw_collect (regcache, reg->regnum, regp);
7375 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
7377 getpkt (&rs->buf, &rs->buf_size, 0);
7379 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
7384 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7385 gdbarch_register_name (gdbarch, reg->regnum), rs->buf);
7386 case PACKET_UNKNOWN:
7389 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
7393 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7394 contents of the register cache buffer. FIXME: ignores errors. */
7397 store_registers_using_G (const struct regcache *regcache)
7399 struct remote_state *rs = get_remote_state ();
7400 struct remote_arch_state *rsa = get_remote_arch_state ();
7404 /* Extract all the registers in the regcache copying them into a
7409 regs = (gdb_byte *) alloca (rsa->sizeof_g_packet);
7410 memset (regs, 0, rsa->sizeof_g_packet);
7411 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7413 struct packet_reg *r = &rsa->regs[i];
7416 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
7420 /* Command describes registers byte by byte,
7421 each byte encoded as two hex characters. */
7424 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
7426 bin2hex (regs, p, rsa->sizeof_g_packet);
7428 getpkt (&rs->buf, &rs->buf_size, 0);
7429 if (packet_check_result (rs->buf) == PACKET_ERROR)
7430 error (_("Could not write registers; remote failure reply '%s'"),
7434 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7435 of the register cache buffer. FIXME: ignores errors. */
7438 remote_store_registers (struct target_ops *ops,
7439 struct regcache *regcache, int regnum)
7441 struct remote_arch_state *rsa = get_remote_arch_state ();
7444 set_remote_traceframe ();
7445 set_general_thread (inferior_ptid);
7449 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
7451 gdb_assert (reg != NULL);
7453 /* Always prefer to store registers using the 'P' packet if
7454 possible; we often change only a small number of registers.
7455 Sometimes we change a larger number; we'd need help from a
7456 higher layer to know to use 'G'. */
7457 if (store_register_using_P (regcache, reg))
7460 /* For now, don't complain if we have no way to write the
7461 register. GDB loses track of unavailable registers too
7462 easily. Some day, this may be an error. We don't have
7463 any way to read the register, either... */
7464 if (!reg->in_g_packet)
7467 store_registers_using_G (regcache);
7471 store_registers_using_G (regcache);
7473 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7474 if (!rsa->regs[i].in_g_packet)
7475 if (!store_register_using_P (regcache, &rsa->regs[i]))
7476 /* See above for why we do not issue an error here. */
7481 /* Return the number of hex digits in num. */
7484 hexnumlen (ULONGEST num)
7488 for (i = 0; num != 0; i++)
7494 /* Set BUF to the minimum number of hex digits representing NUM. */
7497 hexnumstr (char *buf, ULONGEST num)
7499 int len = hexnumlen (num);
7501 return hexnumnstr (buf, num, len);
7505 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7508 hexnumnstr (char *buf, ULONGEST num, int width)
7514 for (i = width - 1; i >= 0; i--)
7516 buf[i] = "0123456789abcdef"[(num & 0xf)];
7523 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7526 remote_address_masked (CORE_ADDR addr)
7528 unsigned int address_size = remote_address_size;
7530 /* If "remoteaddresssize" was not set, default to target address size. */
7532 address_size = gdbarch_addr_bit (target_gdbarch ());
7534 if (address_size > 0
7535 && address_size < (sizeof (ULONGEST) * 8))
7537 /* Only create a mask when that mask can safely be constructed
7538 in a ULONGEST variable. */
7541 mask = (mask << address_size) - 1;
7547 /* Determine whether the remote target supports binary downloading.
7548 This is accomplished by sending a no-op memory write of zero length
7549 to the target at the specified address. It does not suffice to send
7550 the whole packet, since many stubs strip the eighth bit and
7551 subsequently compute a wrong checksum, which causes real havoc with
7554 NOTE: This can still lose if the serial line is not eight-bit
7555 clean. In cases like this, the user should clear "remote
7559 check_binary_download (CORE_ADDR addr)
7561 struct remote_state *rs = get_remote_state ();
7563 switch (packet_support (PACKET_X))
7565 case PACKET_DISABLE:
7569 case PACKET_SUPPORT_UNKNOWN:
7575 p += hexnumstr (p, (ULONGEST) addr);
7577 p += hexnumstr (p, (ULONGEST) 0);
7581 putpkt_binary (rs->buf, (int) (p - rs->buf));
7582 getpkt (&rs->buf, &rs->buf_size, 0);
7584 if (rs->buf[0] == '\0')
7587 fprintf_unfiltered (gdb_stdlog,
7588 "binary downloading NOT "
7589 "supported by target\n");
7590 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
7595 fprintf_unfiltered (gdb_stdlog,
7596 "binary downloading supported by target\n");
7597 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
7604 /* Helper function to resize the payload in order to try to get a good
7605 alignment. We try to write an amount of data such that the next write will
7606 start on an address aligned on REMOTE_ALIGN_WRITES. */
7609 align_for_efficient_write (int todo, CORE_ADDR memaddr)
7611 return ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
7614 /* Write memory data directly to the remote machine.
7615 This does not inform the data cache; the data cache uses this.
7616 HEADER is the starting part of the packet.
7617 MEMADDR is the address in the remote memory space.
7618 MYADDR is the address of the buffer in our space.
7619 LEN_UNITS is the number of addressable units to write.
7620 UNIT_SIZE is the length in bytes of an addressable unit.
7621 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
7622 should send data as binary ('X'), or hex-encoded ('M').
7624 The function creates packet of the form
7625 <HEADER><ADDRESS>,<LENGTH>:<DATA>
7627 where encoding of <DATA> is terminated by PACKET_FORMAT.
7629 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
7632 Return the transferred status, error or OK (an
7633 'enum target_xfer_status' value). Save the number of addressable units
7634 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
7636 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
7637 exchange between gdb and the stub could look like (?? in place of the
7643 -> $M1000,3:eeeeffffeeee#??
7647 <- eeeeffffeeeedddd */
7649 static enum target_xfer_status
7650 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
7651 const gdb_byte *myaddr, ULONGEST len_units,
7652 int unit_size, ULONGEST *xfered_len_units,
7653 char packet_format, int use_length)
7655 struct remote_state *rs = get_remote_state ();
7661 int payload_capacity_bytes;
7662 int payload_length_bytes;
7664 if (packet_format != 'X' && packet_format != 'M')
7665 internal_error (__FILE__, __LINE__,
7666 _("remote_write_bytes_aux: bad packet format"));
7669 return TARGET_XFER_EOF;
7671 payload_capacity_bytes = get_memory_write_packet_size ();
7673 /* The packet buffer will be large enough for the payload;
7674 get_memory_packet_size ensures this. */
7677 /* Compute the size of the actual payload by subtracting out the
7678 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
7680 payload_capacity_bytes -= strlen ("$,:#NN");
7682 /* The comma won't be used. */
7683 payload_capacity_bytes += 1;
7684 payload_capacity_bytes -= strlen (header);
7685 payload_capacity_bytes -= hexnumlen (memaddr);
7687 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
7689 strcat (rs->buf, header);
7690 p = rs->buf + strlen (header);
7692 /* Compute a best guess of the number of bytes actually transfered. */
7693 if (packet_format == 'X')
7695 /* Best guess at number of bytes that will fit. */
7696 todo_units = min (len_units, payload_capacity_bytes / unit_size);
7698 payload_capacity_bytes -= hexnumlen (todo_units);
7699 todo_units = min (todo_units, payload_capacity_bytes / unit_size);
7703 /* Number of bytes that will fit. */
7704 todo_units = min (len_units, (payload_capacity_bytes / unit_size) / 2);
7706 payload_capacity_bytes -= hexnumlen (todo_units);
7707 todo_units = min (todo_units, (payload_capacity_bytes / unit_size) / 2);
7710 if (todo_units <= 0)
7711 internal_error (__FILE__, __LINE__,
7712 _("minimum packet size too small to write data"));
7714 /* If we already need another packet, then try to align the end
7715 of this packet to a useful boundary. */
7716 if (todo_units > 2 * REMOTE_ALIGN_WRITES && todo_units < len_units)
7717 todo_units = align_for_efficient_write (todo_units, memaddr);
7719 /* Append "<memaddr>". */
7720 memaddr = remote_address_masked (memaddr);
7721 p += hexnumstr (p, (ULONGEST) memaddr);
7728 /* Append the length and retain its location and size. It may need to be
7729 adjusted once the packet body has been created. */
7731 plenlen = hexnumstr (p, (ULONGEST) todo_units);
7739 /* Append the packet body. */
7740 if (packet_format == 'X')
7742 /* Binary mode. Send target system values byte by byte, in
7743 increasing byte addresses. Only escape certain critical
7745 payload_length_bytes =
7746 remote_escape_output (myaddr, todo_units, unit_size, (gdb_byte *) p,
7747 &units_written, payload_capacity_bytes);
7749 /* If not all TODO units fit, then we'll need another packet. Make
7750 a second try to keep the end of the packet aligned. Don't do
7751 this if the packet is tiny. */
7752 if (units_written < todo_units && units_written > 2 * REMOTE_ALIGN_WRITES)
7756 new_todo_units = align_for_efficient_write (units_written, memaddr);
7758 if (new_todo_units != units_written)
7759 payload_length_bytes =
7760 remote_escape_output (myaddr, new_todo_units, unit_size,
7761 (gdb_byte *) p, &units_written,
7762 payload_capacity_bytes);
7765 p += payload_length_bytes;
7766 if (use_length && units_written < todo_units)
7768 /* Escape chars have filled up the buffer prematurely,
7769 and we have actually sent fewer units than planned.
7770 Fix-up the length field of the packet. Use the same
7771 number of characters as before. */
7772 plen += hexnumnstr (plen, (ULONGEST) units_written,
7774 *plen = ':'; /* overwrite \0 from hexnumnstr() */
7779 /* Normal mode: Send target system values byte by byte, in
7780 increasing byte addresses. Each byte is encoded as a two hex
7782 p += 2 * bin2hex (myaddr, p, todo_units * unit_size);
7783 units_written = todo_units;
7786 putpkt_binary (rs->buf, (int) (p - rs->buf));
7787 getpkt (&rs->buf, &rs->buf_size, 0);
7789 if (rs->buf[0] == 'E')
7790 return TARGET_XFER_E_IO;
7792 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
7793 send fewer units than we'd planned. */
7794 *xfered_len_units = (ULONGEST) units_written;
7795 return TARGET_XFER_OK;
7798 /* Write memory data directly to the remote machine.
7799 This does not inform the data cache; the data cache uses this.
7800 MEMADDR is the address in the remote memory space.
7801 MYADDR is the address of the buffer in our space.
7802 LEN is the number of bytes.
7804 Return the transferred status, error or OK (an
7805 'enum target_xfer_status' value). Save the number of bytes
7806 transferred in *XFERED_LEN. Only transfer a single packet. */
7808 static enum target_xfer_status
7809 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, ULONGEST len,
7810 int unit_size, ULONGEST *xfered_len)
7812 char *packet_format = 0;
7814 /* Check whether the target supports binary download. */
7815 check_binary_download (memaddr);
7817 switch (packet_support (PACKET_X))
7820 packet_format = "X";
7822 case PACKET_DISABLE:
7823 packet_format = "M";
7825 case PACKET_SUPPORT_UNKNOWN:
7826 internal_error (__FILE__, __LINE__,
7827 _("remote_write_bytes: bad internal state"));
7829 internal_error (__FILE__, __LINE__, _("bad switch"));
7832 return remote_write_bytes_aux (packet_format,
7833 memaddr, myaddr, len, unit_size, xfered_len,
7834 packet_format[0], 1);
7837 /* Read memory data directly from the remote machine.
7838 This does not use the data cache; the data cache uses this.
7839 MEMADDR is the address in the remote memory space.
7840 MYADDR is the address of the buffer in our space.
7841 LEN_UNITS is the number of addressable memory units to read..
7842 UNIT_SIZE is the length in bytes of an addressable unit.
7844 Return the transferred status, error or OK (an
7845 'enum target_xfer_status' value). Save the number of bytes
7846 transferred in *XFERED_LEN_UNITS.
7848 See the comment of remote_write_bytes_aux for an example of
7849 memory read/write exchange between gdb and the stub. */
7851 static enum target_xfer_status
7852 remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr, ULONGEST len_units,
7853 int unit_size, ULONGEST *xfered_len_units)
7855 struct remote_state *rs = get_remote_state ();
7856 int buf_size_bytes; /* Max size of packet output buffer. */
7861 buf_size_bytes = get_memory_read_packet_size ();
7862 /* The packet buffer will be large enough for the payload;
7863 get_memory_packet_size ensures this. */
7865 /* Number of units that will fit. */
7866 todo_units = min (len_units, (buf_size_bytes / unit_size) / 2);
7868 /* Construct "m"<memaddr>","<len>". */
7869 memaddr = remote_address_masked (memaddr);
7872 p += hexnumstr (p, (ULONGEST) memaddr);
7874 p += hexnumstr (p, (ULONGEST) todo_units);
7877 getpkt (&rs->buf, &rs->buf_size, 0);
7878 if (rs->buf[0] == 'E'
7879 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
7880 && rs->buf[3] == '\0')
7881 return TARGET_XFER_E_IO;
7882 /* Reply describes memory byte by byte, each byte encoded as two hex
7885 decoded_bytes = hex2bin (p, myaddr, todo_units * unit_size);
7886 /* Return what we have. Let higher layers handle partial reads. */
7887 *xfered_len_units = (ULONGEST) (decoded_bytes / unit_size);
7888 return TARGET_XFER_OK;
7891 /* Using the set of read-only target sections of remote, read live
7894 For interface/parameters/return description see target.h,
7897 static enum target_xfer_status
7898 remote_xfer_live_readonly_partial (struct target_ops *ops, gdb_byte *readbuf,
7899 ULONGEST memaddr, ULONGEST len,
7900 int unit_size, ULONGEST *xfered_len)
7902 struct target_section *secp;
7903 struct target_section_table *table;
7905 secp = target_section_by_addr (ops, memaddr);
7907 && (bfd_get_section_flags (secp->the_bfd_section->owner,
7908 secp->the_bfd_section)
7911 struct target_section *p;
7912 ULONGEST memend = memaddr + len;
7914 table = target_get_section_table (ops);
7916 for (p = table->sections; p < table->sections_end; p++)
7918 if (memaddr >= p->addr)
7920 if (memend <= p->endaddr)
7922 /* Entire transfer is within this section. */
7923 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
7926 else if (memaddr >= p->endaddr)
7928 /* This section ends before the transfer starts. */
7933 /* This section overlaps the transfer. Just do half. */
7934 len = p->endaddr - memaddr;
7935 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
7942 return TARGET_XFER_EOF;
7945 /* Similar to remote_read_bytes_1, but it reads from the remote stub
7946 first if the requested memory is unavailable in traceframe.
7947 Otherwise, fall back to remote_read_bytes_1. */
7949 static enum target_xfer_status
7950 remote_read_bytes (struct target_ops *ops, CORE_ADDR memaddr,
7951 gdb_byte *myaddr, ULONGEST len, int unit_size,
7952 ULONGEST *xfered_len)
7955 return TARGET_XFER_EOF;
7957 if (get_traceframe_number () != -1)
7959 VEC(mem_range_s) *available;
7961 /* If we fail to get the set of available memory, then the
7962 target does not support querying traceframe info, and so we
7963 attempt reading from the traceframe anyway (assuming the
7964 target implements the old QTro packet then). */
7965 if (traceframe_available_memory (&available, memaddr, len))
7967 struct cleanup *old_chain;
7969 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
7971 if (VEC_empty (mem_range_s, available)
7972 || VEC_index (mem_range_s, available, 0)->start != memaddr)
7974 enum target_xfer_status res;
7976 /* Don't read into the traceframe's available
7978 if (!VEC_empty (mem_range_s, available))
7980 LONGEST oldlen = len;
7982 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
7983 gdb_assert (len <= oldlen);
7986 do_cleanups (old_chain);
7988 /* This goes through the topmost target again. */
7989 res = remote_xfer_live_readonly_partial (ops, myaddr, memaddr,
7990 len, unit_size, xfered_len);
7991 if (res == TARGET_XFER_OK)
7992 return TARGET_XFER_OK;
7995 /* No use trying further, we know some memory starting
7996 at MEMADDR isn't available. */
7998 return TARGET_XFER_UNAVAILABLE;
8002 /* Don't try to read more than how much is available, in
8003 case the target implements the deprecated QTro packet to
8004 cater for older GDBs (the target's knowledge of read-only
8005 sections may be outdated by now). */
8006 len = VEC_index (mem_range_s, available, 0)->length;
8008 do_cleanups (old_chain);
8012 return remote_read_bytes_1 (memaddr, myaddr, len, unit_size, xfered_len);
8017 /* Sends a packet with content determined by the printf format string
8018 FORMAT and the remaining arguments, then gets the reply. Returns
8019 whether the packet was a success, a failure, or unknown. */
8021 static enum packet_result remote_send_printf (const char *format, ...)
8022 ATTRIBUTE_PRINTF (1, 2);
8024 static enum packet_result
8025 remote_send_printf (const char *format, ...)
8027 struct remote_state *rs = get_remote_state ();
8028 int max_size = get_remote_packet_size ();
8031 va_start (ap, format);
8034 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
8035 internal_error (__FILE__, __LINE__, _("Too long remote packet."));
8037 if (putpkt (rs->buf) < 0)
8038 error (_("Communication problem with target."));
8041 getpkt (&rs->buf, &rs->buf_size, 0);
8043 return packet_check_result (rs->buf);
8047 restore_remote_timeout (void *p)
8049 int value = *(int *)p;
8051 remote_timeout = value;
8054 /* Flash writing can take quite some time. We'll set
8055 effectively infinite timeout for flash operations.
8056 In future, we'll need to decide on a better approach. */
8057 static const int remote_flash_timeout = 1000;
8060 remote_flash_erase (struct target_ops *ops,
8061 ULONGEST address, LONGEST length)
8063 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
8064 int saved_remote_timeout = remote_timeout;
8065 enum packet_result ret;
8066 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
8067 &saved_remote_timeout);
8069 remote_timeout = remote_flash_timeout;
8071 ret = remote_send_printf ("vFlashErase:%s,%s",
8072 phex (address, addr_size),
8076 case PACKET_UNKNOWN:
8077 error (_("Remote target does not support flash erase"));
8079 error (_("Error erasing flash with vFlashErase packet"));
8084 do_cleanups (back_to);
8087 static enum target_xfer_status
8088 remote_flash_write (struct target_ops *ops, ULONGEST address,
8089 ULONGEST length, ULONGEST *xfered_len,
8090 const gdb_byte *data)
8092 int saved_remote_timeout = remote_timeout;
8093 enum target_xfer_status ret;
8094 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
8095 &saved_remote_timeout);
8097 remote_timeout = remote_flash_timeout;
8098 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 1,
8100 do_cleanups (back_to);
8106 remote_flash_done (struct target_ops *ops)
8108 int saved_remote_timeout = remote_timeout;
8110 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
8111 &saved_remote_timeout);
8113 remote_timeout = remote_flash_timeout;
8114 ret = remote_send_printf ("vFlashDone");
8115 do_cleanups (back_to);
8119 case PACKET_UNKNOWN:
8120 error (_("Remote target does not support vFlashDone"));
8122 error (_("Error finishing flash operation"));
8129 remote_files_info (struct target_ops *ignore)
8131 puts_filtered ("Debugging a target over a serial line.\n");
8134 /* Stuff for dealing with the packets which are part of this protocol.
8135 See comment at top of file for details. */
8137 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8138 error to higher layers. Called when a serial error is detected.
8139 The exception message is STRING, followed by a colon and a blank,
8140 the system error message for errno at function entry and final dot
8141 for output compatibility with throw_perror_with_name. */
8144 unpush_and_perror (const char *string)
8146 int saved_errno = errno;
8148 remote_unpush_target ();
8149 throw_error (TARGET_CLOSE_ERROR, "%s: %s.", string,
8150 safe_strerror (saved_errno));
8153 /* Read a single character from the remote end. */
8156 readchar (int timeout)
8159 struct remote_state *rs = get_remote_state ();
8161 ch = serial_readchar (rs->remote_desc, timeout);
8166 switch ((enum serial_rc) ch)
8169 remote_unpush_target ();
8170 throw_error (TARGET_CLOSE_ERROR, _("Remote connection closed"));
8173 unpush_and_perror (_("Remote communication error. "
8174 "Target disconnected."));
8176 case SERIAL_TIMEOUT:
8182 /* Wrapper for serial_write that closes the target and throws if
8186 remote_serial_write (const char *str, int len)
8188 struct remote_state *rs = get_remote_state ();
8190 if (serial_write (rs->remote_desc, str, len))
8192 unpush_and_perror (_("Remote communication error. "
8193 "Target disconnected."));
8197 /* Send the command in *BUF to the remote machine, and read the reply
8198 into *BUF. Report an error if we get an error reply. Resize
8199 *BUF using xrealloc if necessary to hold the result, and update
8203 remote_send (char **buf,
8207 getpkt (buf, sizeof_buf, 0);
8209 if ((*buf)[0] == 'E')
8210 error (_("Remote failure reply: %s"), *buf);
8213 /* Return a pointer to an xmalloc'ed string representing an escaped
8214 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
8215 etc. The caller is responsible for releasing the returned
8219 escape_buffer (const char *buf, int n)
8221 struct cleanup *old_chain;
8222 struct ui_file *stb;
8225 stb = mem_fileopen ();
8226 old_chain = make_cleanup_ui_file_delete (stb);
8228 fputstrn_unfiltered (buf, n, '\\', stb);
8229 str = ui_file_xstrdup (stb, NULL);
8230 do_cleanups (old_chain);
8234 /* Display a null-terminated packet on stdout, for debugging, using C
8238 print_packet (const char *buf)
8240 puts_filtered ("\"");
8241 fputstr_filtered (buf, '"', gdb_stdout);
8242 puts_filtered ("\"");
8246 putpkt (const char *buf)
8248 return putpkt_binary (buf, strlen (buf));
8251 /* Send a packet to the remote machine, with error checking. The data
8252 of the packet is in BUF. The string in BUF can be at most
8253 get_remote_packet_size () - 5 to account for the $, # and checksum,
8254 and for a possible /0 if we are debugging (remote_debug) and want
8255 to print the sent packet as a string. */
8258 putpkt_binary (const char *buf, int cnt)
8260 struct remote_state *rs = get_remote_state ();
8262 unsigned char csum = 0;
8263 char *buf2 = (char *) xmalloc (cnt + 6);
8264 struct cleanup *old_chain = make_cleanup (xfree, buf2);
8270 /* Catch cases like trying to read memory or listing threads while
8271 we're waiting for a stop reply. The remote server wouldn't be
8272 ready to handle this request, so we'd hang and timeout. We don't
8273 have to worry about this in synchronous mode, because in that
8274 case it's not possible to issue a command while the target is
8275 running. This is not a problem in non-stop mode, because in that
8276 case, the stub is always ready to process serial input. */
8277 if (!target_is_non_stop_p ()
8278 && target_is_async_p ()
8279 && rs->waiting_for_stop_reply)
8281 error (_("Cannot execute this command while the target is running.\n"
8282 "Use the \"interrupt\" command to stop the target\n"
8283 "and then try again."));
8286 /* We're sending out a new packet. Make sure we don't look at a
8287 stale cached response. */
8288 rs->cached_wait_status = 0;
8290 /* Copy the packet into buffer BUF2, encapsulating it
8291 and giving it a checksum. */
8296 for (i = 0; i < cnt; i++)
8302 *p++ = tohex ((csum >> 4) & 0xf);
8303 *p++ = tohex (csum & 0xf);
8305 /* Send it over and over until we get a positive ack. */
8309 int started_error_output = 0;
8313 struct cleanup *old_chain;
8317 str = escape_buffer (buf2, p - buf2);
8318 old_chain = make_cleanup (xfree, str);
8319 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str);
8320 gdb_flush (gdb_stdlog);
8321 do_cleanups (old_chain);
8323 remote_serial_write (buf2, p - buf2);
8325 /* If this is a no acks version of the remote protocol, send the
8326 packet and move on. */
8330 /* Read until either a timeout occurs (-2) or '+' is read.
8331 Handle any notification that arrives in the mean time. */
8334 ch = readchar (remote_timeout);
8342 case SERIAL_TIMEOUT:
8345 if (started_error_output)
8347 putchar_unfiltered ('\n');
8348 started_error_output = 0;
8357 fprintf_unfiltered (gdb_stdlog, "Ack\n");
8358 do_cleanups (old_chain);
8362 fprintf_unfiltered (gdb_stdlog, "Nak\n");
8364 case SERIAL_TIMEOUT:
8368 do_cleanups (old_chain);
8371 break; /* Retransmit buffer. */
8375 fprintf_unfiltered (gdb_stdlog,
8376 "Packet instead of Ack, ignoring it\n");
8377 /* It's probably an old response sent because an ACK
8378 was lost. Gobble up the packet and ack it so it
8379 doesn't get retransmitted when we resend this
8382 remote_serial_write ("+", 1);
8383 continue; /* Now, go look for +. */
8390 /* If we got a notification, handle it, and go back to looking
8392 /* We've found the start of a notification. Now
8393 collect the data. */
8394 val = read_frame (&rs->buf, &rs->buf_size);
8399 struct cleanup *old_chain;
8402 str = escape_buffer (rs->buf, val);
8403 old_chain = make_cleanup (xfree, str);
8404 fprintf_unfiltered (gdb_stdlog,
8405 " Notification received: %s\n",
8407 do_cleanups (old_chain);
8409 handle_notification (rs->notif_state, rs->buf);
8410 /* We're in sync now, rewait for the ack. */
8417 if (!started_error_output)
8419 started_error_output = 1;
8420 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
8422 fputc_unfiltered (ch & 0177, gdb_stdlog);
8423 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
8432 if (!started_error_output)
8434 started_error_output = 1;
8435 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
8437 fputc_unfiltered (ch & 0177, gdb_stdlog);
8441 break; /* Here to retransmit. */
8445 /* This is wrong. If doing a long backtrace, the user should be
8446 able to get out next time we call QUIT, without anything as
8447 violent as interrupt_query. If we want to provide a way out of
8448 here without getting to the next QUIT, it should be based on
8449 hitting ^C twice as in remote_wait. */
8458 do_cleanups (old_chain);
8462 /* Come here after finding the start of a frame when we expected an
8463 ack. Do our best to discard the rest of this packet. */
8472 c = readchar (remote_timeout);
8475 case SERIAL_TIMEOUT:
8476 /* Nothing we can do. */
8479 /* Discard the two bytes of checksum and stop. */
8480 c = readchar (remote_timeout);
8482 c = readchar (remote_timeout);
8485 case '*': /* Run length encoding. */
8486 /* Discard the repeat count. */
8487 c = readchar (remote_timeout);
8492 /* A regular character. */
8498 /* Come here after finding the start of the frame. Collect the rest
8499 into *BUF, verifying the checksum, length, and handling run-length
8500 compression. NUL terminate the buffer. If there is not enough room,
8501 expand *BUF using xrealloc.
8503 Returns -1 on error, number of characters in buffer (ignoring the
8504 trailing NULL) on success. (could be extended to return one of the
8505 SERIAL status indications). */
8508 read_frame (char **buf_p,
8515 struct remote_state *rs = get_remote_state ();
8522 c = readchar (remote_timeout);
8525 case SERIAL_TIMEOUT:
8527 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
8531 fputs_filtered ("Saw new packet start in middle of old one\n",
8533 return -1; /* Start a new packet, count retries. */
8536 unsigned char pktcsum;
8542 check_0 = readchar (remote_timeout);
8544 check_1 = readchar (remote_timeout);
8546 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
8549 fputs_filtered ("Timeout in checksum, retrying\n",
8553 else if (check_0 < 0 || check_1 < 0)
8556 fputs_filtered ("Communication error in checksum\n",
8561 /* Don't recompute the checksum; with no ack packets we
8562 don't have any way to indicate a packet retransmission
8567 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
8568 if (csum == pktcsum)
8573 struct cleanup *old_chain;
8576 str = escape_buffer (buf, bc);
8577 old_chain = make_cleanup (xfree, str);
8578 fprintf_unfiltered (gdb_stdlog,
8579 "Bad checksum, sentsum=0x%x, "
8580 "csum=0x%x, buf=%s\n",
8581 pktcsum, csum, str);
8582 do_cleanups (old_chain);
8584 /* Number of characters in buffer ignoring trailing
8588 case '*': /* Run length encoding. */
8593 c = readchar (remote_timeout);
8595 repeat = c - ' ' + 3; /* Compute repeat count. */
8597 /* The character before ``*'' is repeated. */
8599 if (repeat > 0 && repeat <= 255 && bc > 0)
8601 if (bc + repeat - 1 >= *sizeof_buf - 1)
8603 /* Make some more room in the buffer. */
8604 *sizeof_buf += repeat;
8605 *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf);
8609 memset (&buf[bc], buf[bc - 1], repeat);
8615 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
8619 if (bc >= *sizeof_buf - 1)
8621 /* Make some more room in the buffer. */
8623 *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf);
8634 /* Read a packet from the remote machine, with error checking, and
8635 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
8636 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
8637 rather than timing out; this is used (in synchronous mode) to wait
8638 for a target that is is executing user code to stop. */
8639 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
8640 don't have to change all the calls to getpkt to deal with the
8641 return value, because at the moment I don't know what the right
8642 thing to do it for those. */
8648 getpkt_sane (buf, sizeof_buf, forever);
8652 /* Read a packet from the remote machine, with error checking, and
8653 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
8654 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
8655 rather than timing out; this is used (in synchronous mode) to wait
8656 for a target that is is executing user code to stop. If FOREVER ==
8657 0, this function is allowed to time out gracefully and return an
8658 indication of this to the caller. Otherwise return the number of
8659 bytes read. If EXPECTING_NOTIF, consider receiving a notification
8660 enough reason to return to the caller. *IS_NOTIF is an output
8661 boolean that indicates whether *BUF holds a notification or not
8662 (a regular packet). */
8665 getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
8666 int expecting_notif, int *is_notif)
8668 struct remote_state *rs = get_remote_state ();
8674 /* We're reading a new response. Make sure we don't look at a
8675 previously cached response. */
8676 rs->cached_wait_status = 0;
8678 strcpy (*buf, "timeout");
8681 timeout = watchdog > 0 ? watchdog : -1;
8682 else if (expecting_notif)
8683 timeout = 0; /* There should already be a char in the buffer. If
8686 timeout = remote_timeout;
8690 /* Process any number of notifications, and then return when
8694 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
8696 for (tries = 1; tries <= MAX_TRIES; tries++)
8698 /* This can loop forever if the remote side sends us
8699 characters continuously, but if it pauses, we'll get
8700 SERIAL_TIMEOUT from readchar because of timeout. Then
8701 we'll count that as a retry.
8703 Note that even when forever is set, we will only wait
8704 forever prior to the start of a packet. After that, we
8705 expect characters to arrive at a brisk pace. They should
8706 show up within remote_timeout intervals. */
8708 c = readchar (timeout);
8709 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
8711 if (c == SERIAL_TIMEOUT)
8713 if (expecting_notif)
8714 return -1; /* Don't complain, it's normal to not get
8715 anything in this case. */
8717 if (forever) /* Watchdog went off? Kill the target. */
8720 remote_unpush_target ();
8721 throw_error (TARGET_CLOSE_ERROR,
8722 _("Watchdog timeout has expired. "
8723 "Target detached."));
8726 fputs_filtered ("Timed out.\n", gdb_stdlog);
8730 /* We've found the start of a packet or notification.
8731 Now collect the data. */
8732 val = read_frame (buf, sizeof_buf);
8737 remote_serial_write ("-", 1);
8740 if (tries > MAX_TRIES)
8742 /* We have tried hard enough, and just can't receive the
8743 packet/notification. Give up. */
8744 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
8746 /* Skip the ack char if we're in no-ack mode. */
8747 if (!rs->noack_mode)
8748 remote_serial_write ("+", 1);
8752 /* If we got an ordinary packet, return that to our caller. */
8757 struct cleanup *old_chain;
8760 str = escape_buffer (*buf, val);
8761 old_chain = make_cleanup (xfree, str);
8762 fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str);
8763 do_cleanups (old_chain);
8766 /* Skip the ack char if we're in no-ack mode. */
8767 if (!rs->noack_mode)
8768 remote_serial_write ("+", 1);
8769 if (is_notif != NULL)
8774 /* If we got a notification, handle it, and go back to looking
8778 gdb_assert (c == '%');
8782 struct cleanup *old_chain;
8785 str = escape_buffer (*buf, val);
8786 old_chain = make_cleanup (xfree, str);
8787 fprintf_unfiltered (gdb_stdlog,
8788 " Notification received: %s\n",
8790 do_cleanups (old_chain);
8792 if (is_notif != NULL)
8795 handle_notification (rs->notif_state, *buf);
8797 /* Notifications require no acknowledgement. */
8799 if (expecting_notif)
8806 getpkt_sane (char **buf, long *sizeof_buf, int forever)
8808 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0, NULL);
8812 getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever,
8815 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1,
8819 /* Check whether EVENT is a fork event for the process specified
8820 by the pid passed in DATA, and if it is, kill the fork child. */
8823 kill_child_of_pending_fork (QUEUE (stop_reply_p) *q,
8824 QUEUE_ITER (stop_reply_p) *iter,
8828 struct queue_iter_param *param = (struct queue_iter_param *) data;
8829 int parent_pid = *(int *) param->input;
8831 if (is_pending_fork_parent (&event->ws, parent_pid, event->ptid))
8833 struct remote_state *rs = get_remote_state ();
8834 int child_pid = ptid_get_pid (event->ws.value.related_pid);
8837 res = remote_vkill (child_pid, rs);
8839 error (_("Can't kill fork child process %d"), child_pid);
8845 /* Kill any new fork children of process PID that haven't been
8846 processed by follow_fork. */
8849 kill_new_fork_children (int pid, struct remote_state *rs)
8851 struct thread_info *thread;
8852 struct notif_client *notif = ¬if_client_stop;
8853 struct queue_iter_param param;
8855 /* Kill the fork child threads of any threads in process PID
8856 that are stopped at a fork event. */
8857 ALL_NON_EXITED_THREADS (thread)
8859 struct target_waitstatus *ws = &thread->pending_follow;
8861 if (is_pending_fork_parent (ws, pid, thread->ptid))
8863 struct remote_state *rs = get_remote_state ();
8864 int child_pid = ptid_get_pid (ws->value.related_pid);
8867 res = remote_vkill (child_pid, rs);
8869 error (_("Can't kill fork child process %d"), child_pid);
8873 /* Check for any pending fork events (not reported or processed yet)
8874 in process PID and kill those fork child threads as well. */
8875 remote_notif_get_pending_events (notif);
8877 param.output = NULL;
8878 QUEUE_iterate (stop_reply_p, stop_reply_queue,
8879 kill_child_of_pending_fork, ¶m);
8883 /* Target hook to kill the current inferior. */
8886 remote_kill (struct target_ops *ops)
8889 int pid = ptid_get_pid (inferior_ptid);
8890 struct remote_state *rs = get_remote_state ();
8892 if (packet_support (PACKET_vKill) != PACKET_DISABLE)
8894 /* If we're stopped while forking and we haven't followed yet,
8895 kill the child task. We need to do this before killing the
8896 parent task because if this is a vfork then the parent will
8898 kill_new_fork_children (pid, rs);
8900 res = remote_vkill (pid, rs);
8903 target_mourn_inferior ();
8908 /* If we are in 'target remote' mode and we are killing the only
8909 inferior, then we will tell gdbserver to exit and unpush the
8911 if (res == -1 && !remote_multi_process_p (rs)
8912 && number_of_live_inferiors () == 1)
8916 /* We've killed the remote end, we get to mourn it. If we are
8917 not in extended mode, mourning the inferior also unpushes
8918 remote_ops from the target stack, which closes the remote
8920 target_mourn_inferior ();
8925 error (_("Can't kill process"));
8928 /* Send a kill request to the target using the 'vKill' packet. */
8931 remote_vkill (int pid, struct remote_state *rs)
8933 if (packet_support (PACKET_vKill) == PACKET_DISABLE)
8936 /* Tell the remote target to detach. */
8937 xsnprintf (rs->buf, get_remote_packet_size (), "vKill;%x", pid);
8939 getpkt (&rs->buf, &rs->buf_size, 0);
8941 switch (packet_ok (rs->buf,
8942 &remote_protocol_packets[PACKET_vKill]))
8948 case PACKET_UNKNOWN:
8951 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
8955 /* Send a kill request to the target using the 'k' packet. */
8958 remote_kill_k (void)
8960 /* Catch errors so the user can quit from gdb even when we
8961 aren't on speaking terms with the remote system. */
8966 CATCH (ex, RETURN_MASK_ERROR)
8968 if (ex.error == TARGET_CLOSE_ERROR)
8970 /* If we got an (EOF) error that caused the target
8971 to go away, then we're done, that's what we wanted.
8972 "k" is susceptible to cause a premature EOF, given
8973 that the remote server isn't actually required to
8974 reply to "k", and it can happen that it doesn't
8975 even get to reply ACK to the "k". */
8979 /* Otherwise, something went wrong. We didn't actually kill
8980 the target. Just propagate the exception, and let the
8981 user or higher layers decide what to do. */
8982 throw_exception (ex);
8988 remote_mourn (struct target_ops *target)
8990 struct remote_state *rs = get_remote_state ();
8992 /* In 'target remote' mode with one inferior, we close the connection. */
8993 if (!rs->extended && number_of_live_inferiors () <= 1)
8995 unpush_target (target);
8997 /* remote_close takes care of doing most of the clean up. */
8998 generic_mourn_inferior ();
9002 /* In case we got here due to an error, but we're going to stay
9004 rs->waiting_for_stop_reply = 0;
9006 /* If the current general thread belonged to the process we just
9007 detached from or has exited, the remote side current general
9008 thread becomes undefined. Considering a case like this:
9010 - We just got here due to a detach.
9011 - The process that we're detaching from happens to immediately
9012 report a global breakpoint being hit in non-stop mode, in the
9013 same thread we had selected before.
9014 - GDB attaches to this process again.
9015 - This event happens to be the next event we handle.
9017 GDB would consider that the current general thread didn't need to
9018 be set on the stub side (with Hg), since for all it knew,
9019 GENERAL_THREAD hadn't changed.
9021 Notice that although in all-stop mode, the remote server always
9022 sets the current thread to the thread reporting the stop event,
9023 that doesn't happen in non-stop mode; in non-stop, the stub *must
9024 not* change the current thread when reporting a breakpoint hit,
9025 due to the decoupling of event reporting and event handling.
9027 To keep things simple, we always invalidate our notion of the
9029 record_currthread (rs, minus_one_ptid);
9031 /* Call common code to mark the inferior as not running. */
9032 generic_mourn_inferior ();
9034 if (!have_inferiors ())
9036 if (!remote_multi_process_p (rs))
9038 /* Check whether the target is running now - some remote stubs
9039 automatically restart after kill. */
9041 getpkt (&rs->buf, &rs->buf_size, 0);
9043 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
9045 /* Assume that the target has been restarted. Set
9046 inferior_ptid so that bits of core GDB realizes
9047 there's something here, e.g., so that the user can
9048 say "kill" again. */
9049 inferior_ptid = magic_null_ptid;
9056 extended_remote_supports_disable_randomization (struct target_ops *self)
9058 return packet_support (PACKET_QDisableRandomization) == PACKET_ENABLE;
9062 extended_remote_disable_randomization (int val)
9064 struct remote_state *rs = get_remote_state ();
9067 xsnprintf (rs->buf, get_remote_packet_size (), "QDisableRandomization:%x",
9070 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
9072 error (_("Target does not support QDisableRandomization."));
9073 if (strcmp (reply, "OK") != 0)
9074 error (_("Bogus QDisableRandomization reply from target: %s"), reply);
9078 extended_remote_run (char *args)
9080 struct remote_state *rs = get_remote_state ();
9082 const char *remote_exec_file = get_remote_exec_file ();
9084 /* If the user has disabled vRun support, or we have detected that
9085 support is not available, do not try it. */
9086 if (packet_support (PACKET_vRun) == PACKET_DISABLE)
9089 strcpy (rs->buf, "vRun;");
9090 len = strlen (rs->buf);
9092 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
9093 error (_("Remote file name too long for run packet"));
9094 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len,
9095 strlen (remote_exec_file));
9097 gdb_assert (args != NULL);
9100 struct cleanup *back_to;
9104 argv = gdb_buildargv (args);
9105 back_to = make_cleanup_freeargv (argv);
9106 for (i = 0; argv[i] != NULL; i++)
9108 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
9109 error (_("Argument list too long for run packet"));
9110 rs->buf[len++] = ';';
9111 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len,
9114 do_cleanups (back_to);
9117 rs->buf[len++] = '\0';
9120 getpkt (&rs->buf, &rs->buf_size, 0);
9122 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]))
9125 /* We have a wait response. All is well. */
9127 case PACKET_UNKNOWN:
9130 if (remote_exec_file[0] == '\0')
9131 error (_("Running the default executable on the remote target failed; "
9132 "try \"set remote exec-file\"?"));
9134 error (_("Running \"%s\" on the remote target failed"),
9137 gdb_assert_not_reached (_("bad switch"));
9141 /* In the extended protocol we want to be able to do things like
9142 "run" and have them basically work as expected. So we need
9143 a special create_inferior function. We support changing the
9144 executable file and the command line arguments, but not the
9148 extended_remote_create_inferior (struct target_ops *ops,
9149 char *exec_file, char *args,
9150 char **env, int from_tty)
9154 struct remote_state *rs = get_remote_state ();
9155 const char *remote_exec_file = get_remote_exec_file ();
9157 /* If running asynchronously, register the target file descriptor
9158 with the event loop. */
9159 if (target_can_async_p ())
9162 /* Disable address space randomization if requested (and supported). */
9163 if (extended_remote_supports_disable_randomization (ops))
9164 extended_remote_disable_randomization (disable_randomization);
9166 /* Now restart the remote server. */
9167 run_worked = extended_remote_run (args) != -1;
9170 /* vRun was not supported. Fail if we need it to do what the
9172 if (remote_exec_file[0])
9173 error (_("Remote target does not support \"set remote exec-file\""));
9175 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9177 /* Fall back to "R". */
9178 extended_remote_restart ();
9181 if (!have_inferiors ())
9183 /* Clean up from the last time we ran, before we mark the target
9184 running again. This will mark breakpoints uninserted, and
9185 get_offsets may insert breakpoints. */
9186 init_thread_list ();
9187 init_wait_for_inferior ();
9190 /* vRun's success return is a stop reply. */
9191 stop_reply = run_worked ? rs->buf : NULL;
9192 add_current_inferior_and_thread (stop_reply);
9194 /* Get updated offsets, if the stub uses qOffsets. */
9199 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9200 the list of conditions (in agent expression bytecode format), if any, the
9201 target needs to evaluate. The output is placed into the packet buffer
9202 started from BUF and ended at BUF_END. */
9205 remote_add_target_side_condition (struct gdbarch *gdbarch,
9206 struct bp_target_info *bp_tgt, char *buf,
9209 struct agent_expr *aexpr = NULL;
9212 if (VEC_empty (agent_expr_p, bp_tgt->conditions))
9215 buf += strlen (buf);
9216 xsnprintf (buf, buf_end - buf, "%s", ";");
9219 /* Send conditions to the target and free the vector. */
9221 VEC_iterate (agent_expr_p, bp_tgt->conditions, ix, aexpr);
9224 xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len);
9225 buf += strlen (buf);
9226 for (i = 0; i < aexpr->len; ++i)
9227 buf = pack_hex_byte (buf, aexpr->buf[i]);
9234 remote_add_target_side_commands (struct gdbarch *gdbarch,
9235 struct bp_target_info *bp_tgt, char *buf)
9237 struct agent_expr *aexpr = NULL;
9240 if (VEC_empty (agent_expr_p, bp_tgt->tcommands))
9243 buf += strlen (buf);
9245 sprintf (buf, ";cmds:%x,", bp_tgt->persist);
9246 buf += strlen (buf);
9248 /* Concatenate all the agent expressions that are commands into the
9251 VEC_iterate (agent_expr_p, bp_tgt->tcommands, ix, aexpr);
9254 sprintf (buf, "X%x,", aexpr->len);
9255 buf += strlen (buf);
9256 for (i = 0; i < aexpr->len; ++i)
9257 buf = pack_hex_byte (buf, aexpr->buf[i]);
9262 /* Insert a breakpoint. On targets that have software breakpoint
9263 support, we ask the remote target to do the work; on targets
9264 which don't, we insert a traditional memory breakpoint. */
9267 remote_insert_breakpoint (struct target_ops *ops,
9268 struct gdbarch *gdbarch,
9269 struct bp_target_info *bp_tgt)
9271 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9272 If it succeeds, then set the support to PACKET_ENABLE. If it
9273 fails, and the user has explicitly requested the Z support then
9274 report an error, otherwise, mark it disabled and go on. */
9276 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
9278 CORE_ADDR addr = bp_tgt->reqstd_address;
9279 struct remote_state *rs;
9283 /* Make sure the remote is pointing at the right process, if
9285 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9286 set_general_process ();
9288 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
9290 rs = get_remote_state ();
9292 endbuf = rs->buf + get_remote_packet_size ();
9297 addr = (ULONGEST) remote_address_masked (addr);
9298 p += hexnumstr (p, addr);
9299 xsnprintf (p, endbuf - p, ",%d", bpsize);
9301 if (remote_supports_cond_breakpoints (ops))
9302 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
9304 if (remote_can_run_breakpoint_commands (ops))
9305 remote_add_target_side_commands (gdbarch, bp_tgt, p);
9308 getpkt (&rs->buf, &rs->buf_size, 0);
9310 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
9315 bp_tgt->placed_address = addr;
9316 bp_tgt->placed_size = bpsize;
9318 case PACKET_UNKNOWN:
9323 /* If this breakpoint has target-side commands but this stub doesn't
9324 support Z0 packets, throw error. */
9325 if (!VEC_empty (agent_expr_p, bp_tgt->tcommands))
9326 throw_error (NOT_SUPPORTED_ERROR, _("\
9327 Target doesn't support breakpoints that have target side commands."));
9329 return memory_insert_breakpoint (ops, gdbarch, bp_tgt);
9333 remote_remove_breakpoint (struct target_ops *ops,
9334 struct gdbarch *gdbarch,
9335 struct bp_target_info *bp_tgt)
9337 CORE_ADDR addr = bp_tgt->placed_address;
9338 struct remote_state *rs = get_remote_state ();
9340 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
9343 char *endbuf = rs->buf + get_remote_packet_size ();
9345 /* Make sure the remote is pointing at the right process, if
9347 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9348 set_general_process ();
9354 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
9355 p += hexnumstr (p, addr);
9356 xsnprintf (p, endbuf - p, ",%d", bp_tgt->placed_size);
9359 getpkt (&rs->buf, &rs->buf_size, 0);
9361 return (rs->buf[0] == 'E');
9364 return memory_remove_breakpoint (ops, gdbarch, bp_tgt);
9367 static enum Z_packet_type
9368 watchpoint_to_Z_packet (int type)
9373 return Z_PACKET_WRITE_WP;
9376 return Z_PACKET_READ_WP;
9379 return Z_PACKET_ACCESS_WP;
9382 internal_error (__FILE__, __LINE__,
9383 _("hw_bp_to_z: bad watchpoint type %d"), type);
9388 remote_insert_watchpoint (struct target_ops *self, CORE_ADDR addr, int len,
9389 enum target_hw_bp_type type, struct expression *cond)
9391 struct remote_state *rs = get_remote_state ();
9392 char *endbuf = rs->buf + get_remote_packet_size ();
9394 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
9396 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
9399 /* Make sure the remote is pointing at the right process, if
9401 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9402 set_general_process ();
9404 xsnprintf (rs->buf, endbuf - rs->buf, "Z%x,", packet);
9405 p = strchr (rs->buf, '\0');
9406 addr = remote_address_masked (addr);
9407 p += hexnumstr (p, (ULONGEST) addr);
9408 xsnprintf (p, endbuf - p, ",%x", len);
9411 getpkt (&rs->buf, &rs->buf_size, 0);
9413 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
9417 case PACKET_UNKNOWN:
9422 internal_error (__FILE__, __LINE__,
9423 _("remote_insert_watchpoint: reached end of function"));
9427 remote_watchpoint_addr_within_range (struct target_ops *target, CORE_ADDR addr,
9428 CORE_ADDR start, int length)
9430 CORE_ADDR diff = remote_address_masked (addr - start);
9432 return diff < length;
9437 remote_remove_watchpoint (struct target_ops *self, CORE_ADDR addr, int len,
9438 enum target_hw_bp_type type, struct expression *cond)
9440 struct remote_state *rs = get_remote_state ();
9441 char *endbuf = rs->buf + get_remote_packet_size ();
9443 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
9445 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
9448 /* Make sure the remote is pointing at the right process, if
9450 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9451 set_general_process ();
9453 xsnprintf (rs->buf, endbuf - rs->buf, "z%x,", packet);
9454 p = strchr (rs->buf, '\0');
9455 addr = remote_address_masked (addr);
9456 p += hexnumstr (p, (ULONGEST) addr);
9457 xsnprintf (p, endbuf - p, ",%x", len);
9459 getpkt (&rs->buf, &rs->buf_size, 0);
9461 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
9464 case PACKET_UNKNOWN:
9469 internal_error (__FILE__, __LINE__,
9470 _("remote_remove_watchpoint: reached end of function"));
9474 int remote_hw_watchpoint_limit = -1;
9475 int remote_hw_watchpoint_length_limit = -1;
9476 int remote_hw_breakpoint_limit = -1;
9479 remote_region_ok_for_hw_watchpoint (struct target_ops *self,
9480 CORE_ADDR addr, int len)
9482 if (remote_hw_watchpoint_length_limit == 0)
9484 else if (remote_hw_watchpoint_length_limit < 0)
9486 else if (len <= remote_hw_watchpoint_length_limit)
9493 remote_check_watch_resources (struct target_ops *self,
9494 enum bptype type, int cnt, int ot)
9496 if (type == bp_hardware_breakpoint)
9498 if (remote_hw_breakpoint_limit == 0)
9500 else if (remote_hw_breakpoint_limit < 0)
9502 else if (cnt <= remote_hw_breakpoint_limit)
9507 if (remote_hw_watchpoint_limit == 0)
9509 else if (remote_hw_watchpoint_limit < 0)
9513 else if (cnt <= remote_hw_watchpoint_limit)
9519 /* The to_stopped_by_sw_breakpoint method of target remote. */
9522 remote_stopped_by_sw_breakpoint (struct target_ops *ops)
9524 struct thread_info *thread = inferior_thread ();
9526 return (thread->priv != NULL
9527 && thread->priv->stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT);
9530 /* The to_supports_stopped_by_sw_breakpoint method of target
9534 remote_supports_stopped_by_sw_breakpoint (struct target_ops *ops)
9536 return (packet_support (PACKET_swbreak_feature) == PACKET_ENABLE);
9539 /* The to_stopped_by_hw_breakpoint method of target remote. */
9542 remote_stopped_by_hw_breakpoint (struct target_ops *ops)
9544 struct thread_info *thread = inferior_thread ();
9546 return (thread->priv != NULL
9547 && thread->priv->stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT);
9550 /* The to_supports_stopped_by_hw_breakpoint method of target
9554 remote_supports_stopped_by_hw_breakpoint (struct target_ops *ops)
9556 return (packet_support (PACKET_hwbreak_feature) == PACKET_ENABLE);
9560 remote_stopped_by_watchpoint (struct target_ops *ops)
9562 struct thread_info *thread = inferior_thread ();
9564 return (thread->priv != NULL
9565 && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT);
9569 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
9571 struct thread_info *thread = inferior_thread ();
9573 if (thread->priv != NULL
9574 && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT)
9576 *addr_p = thread->priv->watch_data_address;
9585 remote_insert_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
9586 struct bp_target_info *bp_tgt)
9588 CORE_ADDR addr = bp_tgt->reqstd_address;
9589 struct remote_state *rs;
9594 /* The length field should be set to the size of a breakpoint
9595 instruction, even though we aren't inserting one ourselves. */
9597 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
9599 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
9602 /* Make sure the remote is pointing at the right process, if
9604 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9605 set_general_process ();
9607 rs = get_remote_state ();
9609 endbuf = rs->buf + get_remote_packet_size ();
9615 addr = remote_address_masked (addr);
9616 p += hexnumstr (p, (ULONGEST) addr);
9617 xsnprintf (p, endbuf - p, ",%x", bpsize);
9619 if (remote_supports_cond_breakpoints (self))
9620 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
9622 if (remote_can_run_breakpoint_commands (self))
9623 remote_add_target_side_commands (gdbarch, bp_tgt, p);
9626 getpkt (&rs->buf, &rs->buf_size, 0);
9628 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
9631 if (rs->buf[1] == '.')
9633 message = strchr (rs->buf + 2, '.');
9635 error (_("Remote failure reply: %s"), message + 1);
9638 case PACKET_UNKNOWN:
9641 bp_tgt->placed_address = addr;
9642 bp_tgt->placed_size = bpsize;
9645 internal_error (__FILE__, __LINE__,
9646 _("remote_insert_hw_breakpoint: reached end of function"));
9651 remote_remove_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
9652 struct bp_target_info *bp_tgt)
9655 struct remote_state *rs = get_remote_state ();
9657 char *endbuf = rs->buf + get_remote_packet_size ();
9659 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
9662 /* Make sure the remote is pointing at the right process, if
9664 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9665 set_general_process ();
9671 addr = remote_address_masked (bp_tgt->placed_address);
9672 p += hexnumstr (p, (ULONGEST) addr);
9673 xsnprintf (p, endbuf - p, ",%x", bp_tgt->placed_size);
9676 getpkt (&rs->buf, &rs->buf_size, 0);
9678 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
9681 case PACKET_UNKNOWN:
9686 internal_error (__FILE__, __LINE__,
9687 _("remote_remove_hw_breakpoint: reached end of function"));
9690 /* Verify memory using the "qCRC:" request. */
9693 remote_verify_memory (struct target_ops *ops,
9694 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
9696 struct remote_state *rs = get_remote_state ();
9697 unsigned long host_crc, target_crc;
9700 /* It doesn't make sense to use qCRC if the remote target is
9701 connected but not running. */
9702 if (target_has_execution && packet_support (PACKET_qCRC) != PACKET_DISABLE)
9704 enum packet_result result;
9706 /* Make sure the remote is pointing at the right process. */
9707 set_general_process ();
9709 /* FIXME: assumes lma can fit into long. */
9710 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
9711 (long) lma, (long) size);
9714 /* Be clever; compute the host_crc before waiting for target
9716 host_crc = xcrc32 (data, size, 0xffffffff);
9718 getpkt (&rs->buf, &rs->buf_size, 0);
9720 result = packet_ok (rs->buf,
9721 &remote_protocol_packets[PACKET_qCRC]);
9722 if (result == PACKET_ERROR)
9724 else if (result == PACKET_OK)
9726 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
9727 target_crc = target_crc * 16 + fromhex (*tmp);
9729 return (host_crc == target_crc);
9733 return simple_verify_memory (ops, data, lma, size);
9736 /* compare-sections command
9738 With no arguments, compares each loadable section in the exec bfd
9739 with the same memory range on the target, and reports mismatches.
9740 Useful for verifying the image on the target against the exec file. */
9743 compare_sections_command (char *args, int from_tty)
9746 struct cleanup *old_chain;
9748 const char *sectname;
9757 error (_("command cannot be used without an exec file"));
9759 /* Make sure the remote is pointing at the right process. */
9760 set_general_process ();
9762 if (args != NULL && strcmp (args, "-r") == 0)
9768 for (s = exec_bfd->sections; s; s = s->next)
9770 if (!(s->flags & SEC_LOAD))
9771 continue; /* Skip non-loadable section. */
9773 if (read_only && (s->flags & SEC_READONLY) == 0)
9774 continue; /* Skip writeable sections */
9776 size = bfd_get_section_size (s);
9778 continue; /* Skip zero-length section. */
9780 sectname = bfd_get_section_name (exec_bfd, s);
9781 if (args && strcmp (args, sectname) != 0)
9782 continue; /* Not the section selected by user. */
9784 matched = 1; /* Do this section. */
9787 sectdata = (gdb_byte *) xmalloc (size);
9788 old_chain = make_cleanup (xfree, sectdata);
9789 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
9791 res = target_verify_memory (sectdata, lma, size);
9794 error (_("target memory fault, section %s, range %s -- %s"), sectname,
9795 paddress (target_gdbarch (), lma),
9796 paddress (target_gdbarch (), lma + size));
9798 printf_filtered ("Section %s, range %s -- %s: ", sectname,
9799 paddress (target_gdbarch (), lma),
9800 paddress (target_gdbarch (), lma + size));
9802 printf_filtered ("matched.\n");
9805 printf_filtered ("MIS-MATCHED!\n");
9809 do_cleanups (old_chain);
9812 warning (_("One or more sections of the target image does not match\n\
9813 the loaded file\n"));
9814 if (args && !matched)
9815 printf_filtered (_("No loaded section named '%s'.\n"), args);
9818 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
9819 into remote target. The number of bytes written to the remote
9820 target is returned, or -1 for error. */
9822 static enum target_xfer_status
9823 remote_write_qxfer (struct target_ops *ops, const char *object_name,
9824 const char *annex, const gdb_byte *writebuf,
9825 ULONGEST offset, LONGEST len, ULONGEST *xfered_len,
9826 struct packet_config *packet)
9830 struct remote_state *rs = get_remote_state ();
9831 int max_size = get_memory_write_packet_size ();
9833 if (packet->support == PACKET_DISABLE)
9834 return TARGET_XFER_E_IO;
9836 /* Insert header. */
9837 i = snprintf (rs->buf, max_size,
9838 "qXfer:%s:write:%s:%s:",
9839 object_name, annex ? annex : "",
9840 phex_nz (offset, sizeof offset));
9841 max_size -= (i + 1);
9843 /* Escape as much data as fits into rs->buf. */
9844 buf_len = remote_escape_output
9845 (writebuf, len, 1, (gdb_byte *) rs->buf + i, &max_size, max_size);
9847 if (putpkt_binary (rs->buf, i + buf_len) < 0
9848 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
9849 || packet_ok (rs->buf, packet) != PACKET_OK)
9850 return TARGET_XFER_E_IO;
9852 unpack_varlen_hex (rs->buf, &n);
9855 return TARGET_XFER_OK;
9858 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
9859 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
9860 number of bytes read is returned, or 0 for EOF, or -1 for error.
9861 The number of bytes read may be less than LEN without indicating an
9862 EOF. PACKET is checked and updated to indicate whether the remote
9863 target supports this object. */
9865 static enum target_xfer_status
9866 remote_read_qxfer (struct target_ops *ops, const char *object_name,
9868 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
9869 ULONGEST *xfered_len,
9870 struct packet_config *packet)
9872 struct remote_state *rs = get_remote_state ();
9873 LONGEST i, n, packet_len;
9875 if (packet->support == PACKET_DISABLE)
9876 return TARGET_XFER_E_IO;
9878 /* Check whether we've cached an end-of-object packet that matches
9880 if (rs->finished_object)
9882 if (strcmp (object_name, rs->finished_object) == 0
9883 && strcmp (annex ? annex : "", rs->finished_annex) == 0
9884 && offset == rs->finished_offset)
9885 return TARGET_XFER_EOF;
9888 /* Otherwise, we're now reading something different. Discard
9890 xfree (rs->finished_object);
9891 xfree (rs->finished_annex);
9892 rs->finished_object = NULL;
9893 rs->finished_annex = NULL;
9896 /* Request only enough to fit in a single packet. The actual data
9897 may not, since we don't know how much of it will need to be escaped;
9898 the target is free to respond with slightly less data. We subtract
9899 five to account for the response type and the protocol frame. */
9900 n = min (get_remote_packet_size () - 5, len);
9901 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
9902 object_name, annex ? annex : "",
9903 phex_nz (offset, sizeof offset),
9904 phex_nz (n, sizeof n));
9905 i = putpkt (rs->buf);
9907 return TARGET_XFER_E_IO;
9910 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
9911 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
9912 return TARGET_XFER_E_IO;
9914 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
9915 error (_("Unknown remote qXfer reply: %s"), rs->buf);
9917 /* 'm' means there is (or at least might be) more data after this
9918 batch. That does not make sense unless there's at least one byte
9919 of data in this reply. */
9920 if (rs->buf[0] == 'm' && packet_len == 1)
9921 error (_("Remote qXfer reply contained no data."));
9923 /* Got some data. */
9924 i = remote_unescape_input ((gdb_byte *) rs->buf + 1,
9925 packet_len - 1, readbuf, n);
9927 /* 'l' is an EOF marker, possibly including a final block of data,
9928 or possibly empty. If we have the final block of a non-empty
9929 object, record this fact to bypass a subsequent partial read. */
9930 if (rs->buf[0] == 'l' && offset + i > 0)
9932 rs->finished_object = xstrdup (object_name);
9933 rs->finished_annex = xstrdup (annex ? annex : "");
9934 rs->finished_offset = offset + i;
9938 return TARGET_XFER_EOF;
9942 return TARGET_XFER_OK;
9946 static enum target_xfer_status
9947 remote_xfer_partial (struct target_ops *ops, enum target_object object,
9948 const char *annex, gdb_byte *readbuf,
9949 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
9950 ULONGEST *xfered_len)
9952 struct remote_state *rs;
9956 int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
9958 set_remote_traceframe ();
9959 set_general_thread (inferior_ptid);
9961 rs = get_remote_state ();
9963 /* Handle memory using the standard memory routines. */
9964 if (object == TARGET_OBJECT_MEMORY)
9966 /* If the remote target is connected but not running, we should
9967 pass this request down to a lower stratum (e.g. the executable
9969 if (!target_has_execution)
9970 return TARGET_XFER_EOF;
9972 if (writebuf != NULL)
9973 return remote_write_bytes (offset, writebuf, len, unit_size,
9976 return remote_read_bytes (ops, offset, readbuf, len, unit_size,
9980 /* Handle SPU memory using qxfer packets. */
9981 if (object == TARGET_OBJECT_SPU)
9984 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
9985 xfered_len, &remote_protocol_packets
9986 [PACKET_qXfer_spu_read]);
9988 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
9989 xfered_len, &remote_protocol_packets
9990 [PACKET_qXfer_spu_write]);
9993 /* Handle extra signal info using qxfer packets. */
9994 if (object == TARGET_OBJECT_SIGNAL_INFO)
9997 return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len,
9998 xfered_len, &remote_protocol_packets
9999 [PACKET_qXfer_siginfo_read]);
10001 return remote_write_qxfer (ops, "siginfo", annex,
10002 writebuf, offset, len, xfered_len,
10003 &remote_protocol_packets
10004 [PACKET_qXfer_siginfo_write]);
10007 if (object == TARGET_OBJECT_STATIC_TRACE_DATA)
10010 return remote_read_qxfer (ops, "statictrace", annex,
10011 readbuf, offset, len, xfered_len,
10012 &remote_protocol_packets
10013 [PACKET_qXfer_statictrace_read]);
10015 return TARGET_XFER_E_IO;
10018 /* Only handle flash writes. */
10019 if (writebuf != NULL)
10023 case TARGET_OBJECT_FLASH:
10024 return remote_flash_write (ops, offset, len, xfered_len,
10028 return TARGET_XFER_E_IO;
10032 /* Map pre-existing objects onto letters. DO NOT do this for new
10033 objects!!! Instead specify new query packets. */
10036 case TARGET_OBJECT_AVR:
10040 case TARGET_OBJECT_AUXV:
10041 gdb_assert (annex == NULL);
10042 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
10044 &remote_protocol_packets[PACKET_qXfer_auxv]);
10046 case TARGET_OBJECT_AVAILABLE_FEATURES:
10047 return remote_read_qxfer
10048 (ops, "features", annex, readbuf, offset, len, xfered_len,
10049 &remote_protocol_packets[PACKET_qXfer_features]);
10051 case TARGET_OBJECT_LIBRARIES:
10052 return remote_read_qxfer
10053 (ops, "libraries", annex, readbuf, offset, len, xfered_len,
10054 &remote_protocol_packets[PACKET_qXfer_libraries]);
10056 case TARGET_OBJECT_LIBRARIES_SVR4:
10057 return remote_read_qxfer
10058 (ops, "libraries-svr4", annex, readbuf, offset, len, xfered_len,
10059 &remote_protocol_packets[PACKET_qXfer_libraries_svr4]);
10061 case TARGET_OBJECT_MEMORY_MAP:
10062 gdb_assert (annex == NULL);
10063 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
10065 &remote_protocol_packets[PACKET_qXfer_memory_map]);
10067 case TARGET_OBJECT_OSDATA:
10068 /* Should only get here if we're connected. */
10069 gdb_assert (rs->remote_desc);
10070 return remote_read_qxfer
10071 (ops, "osdata", annex, readbuf, offset, len, xfered_len,
10072 &remote_protocol_packets[PACKET_qXfer_osdata]);
10074 case TARGET_OBJECT_THREADS:
10075 gdb_assert (annex == NULL);
10076 return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len,
10078 &remote_protocol_packets[PACKET_qXfer_threads]);
10080 case TARGET_OBJECT_TRACEFRAME_INFO:
10081 gdb_assert (annex == NULL);
10082 return remote_read_qxfer
10083 (ops, "traceframe-info", annex, readbuf, offset, len, xfered_len,
10084 &remote_protocol_packets[PACKET_qXfer_traceframe_info]);
10086 case TARGET_OBJECT_FDPIC:
10087 return remote_read_qxfer (ops, "fdpic", annex, readbuf, offset, len,
10089 &remote_protocol_packets[PACKET_qXfer_fdpic]);
10091 case TARGET_OBJECT_OPENVMS_UIB:
10092 return remote_read_qxfer (ops, "uib", annex, readbuf, offset, len,
10094 &remote_protocol_packets[PACKET_qXfer_uib]);
10096 case TARGET_OBJECT_BTRACE:
10097 return remote_read_qxfer (ops, "btrace", annex, readbuf, offset, len,
10099 &remote_protocol_packets[PACKET_qXfer_btrace]);
10101 case TARGET_OBJECT_BTRACE_CONF:
10102 return remote_read_qxfer (ops, "btrace-conf", annex, readbuf, offset,
10104 &remote_protocol_packets[PACKET_qXfer_btrace_conf]);
10106 case TARGET_OBJECT_EXEC_FILE:
10107 return remote_read_qxfer (ops, "exec-file", annex, readbuf, offset,
10109 &remote_protocol_packets[PACKET_qXfer_exec_file]);
10112 return TARGET_XFER_E_IO;
10115 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10116 large enough let the caller deal with it. */
10117 if (len < get_remote_packet_size ())
10118 return TARGET_XFER_E_IO;
10119 len = get_remote_packet_size ();
10121 /* Except for querying the minimum buffer size, target must be open. */
10122 if (!rs->remote_desc)
10123 error (_("remote query is only available after target open"));
10125 gdb_assert (annex != NULL);
10126 gdb_assert (readbuf != NULL);
10130 *p2++ = query_type;
10132 /* We used one buffer char for the remote protocol q command and
10133 another for the query type. As the remote protocol encapsulation
10134 uses 4 chars plus one extra in case we are debugging
10135 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10138 while (annex[i] && (i < (get_remote_packet_size () - 8)))
10140 /* Bad caller may have sent forbidden characters. */
10141 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
10146 gdb_assert (annex[i] == '\0');
10148 i = putpkt (rs->buf);
10150 return TARGET_XFER_E_IO;
10152 getpkt (&rs->buf, &rs->buf_size, 0);
10153 strcpy ((char *) readbuf, rs->buf);
10155 *xfered_len = strlen ((char *) readbuf);
10156 return TARGET_XFER_OK;
10160 remote_search_memory (struct target_ops* ops,
10161 CORE_ADDR start_addr, ULONGEST search_space_len,
10162 const gdb_byte *pattern, ULONGEST pattern_len,
10163 CORE_ADDR *found_addrp)
10165 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
10166 struct remote_state *rs = get_remote_state ();
10167 int max_size = get_memory_write_packet_size ();
10168 struct packet_config *packet =
10169 &remote_protocol_packets[PACKET_qSearch_memory];
10170 /* Number of packet bytes used to encode the pattern;
10171 this could be more than PATTERN_LEN due to escape characters. */
10172 int escaped_pattern_len;
10173 /* Amount of pattern that was encodable in the packet. */
10174 int used_pattern_len;
10177 ULONGEST found_addr;
10179 /* Don't go to the target if we don't have to.
10180 This is done before checking packet->support to avoid the possibility that
10181 a success for this edge case means the facility works in general. */
10182 if (pattern_len > search_space_len)
10184 if (pattern_len == 0)
10186 *found_addrp = start_addr;
10190 /* If we already know the packet isn't supported, fall back to the simple
10191 way of searching memory. */
10193 if (packet_config_support (packet) == PACKET_DISABLE)
10195 /* Target doesn't provided special support, fall back and use the
10196 standard support (copy memory and do the search here). */
10197 return simple_search_memory (ops, start_addr, search_space_len,
10198 pattern, pattern_len, found_addrp);
10201 /* Make sure the remote is pointing at the right process. */
10202 set_general_process ();
10204 /* Insert header. */
10205 i = snprintf (rs->buf, max_size,
10206 "qSearch:memory:%s;%s;",
10207 phex_nz (start_addr, addr_size),
10208 phex_nz (search_space_len, sizeof (search_space_len)));
10209 max_size -= (i + 1);
10211 /* Escape as much data as fits into rs->buf. */
10212 escaped_pattern_len =
10213 remote_escape_output (pattern, pattern_len, 1, (gdb_byte *) rs->buf + i,
10214 &used_pattern_len, max_size);
10216 /* Bail if the pattern is too large. */
10217 if (used_pattern_len != pattern_len)
10218 error (_("Pattern is too large to transmit to remote target."));
10220 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
10221 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
10222 || packet_ok (rs->buf, packet) != PACKET_OK)
10224 /* The request may not have worked because the command is not
10225 supported. If so, fall back to the simple way. */
10226 if (packet->support == PACKET_DISABLE)
10228 return simple_search_memory (ops, start_addr, search_space_len,
10229 pattern, pattern_len, found_addrp);
10234 if (rs->buf[0] == '0')
10236 else if (rs->buf[0] == '1')
10239 if (rs->buf[1] != ',')
10240 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
10241 unpack_varlen_hex (rs->buf + 2, &found_addr);
10242 *found_addrp = found_addr;
10245 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
10251 remote_rcmd (struct target_ops *self, const char *command,
10252 struct ui_file *outbuf)
10254 struct remote_state *rs = get_remote_state ();
10257 if (!rs->remote_desc)
10258 error (_("remote rcmd is only available after target open"));
10260 /* Send a NULL command across as an empty command. */
10261 if (command == NULL)
10264 /* The query prefix. */
10265 strcpy (rs->buf, "qRcmd,");
10266 p = strchr (rs->buf, '\0');
10268 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/)
10269 > get_remote_packet_size ())
10270 error (_("\"monitor\" command ``%s'' is too long."), command);
10272 /* Encode the actual command. */
10273 bin2hex ((const gdb_byte *) command, p, strlen (command));
10275 if (putpkt (rs->buf) < 0)
10276 error (_("Communication problem with target."));
10278 /* get/display the response */
10283 /* XXX - see also remote_get_noisy_reply(). */
10284 QUIT; /* Allow user to bail out with ^C. */
10286 if (getpkt_sane (&rs->buf, &rs->buf_size, 0) == -1)
10288 /* Timeout. Continue to (try to) read responses.
10289 This is better than stopping with an error, assuming the stub
10290 is still executing the (long) monitor command.
10291 If needed, the user can interrupt gdb using C-c, obtaining
10292 an effect similar to stop on timeout. */
10296 if (buf[0] == '\0')
10297 error (_("Target does not support this command."));
10298 if (buf[0] == 'O' && buf[1] != 'K')
10300 remote_console_output (buf + 1); /* 'O' message from stub. */
10303 if (strcmp (buf, "OK") == 0)
10305 if (strlen (buf) == 3 && buf[0] == 'E'
10306 && isdigit (buf[1]) && isdigit (buf[2]))
10308 error (_("Protocol error with Rcmd"));
10310 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
10312 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
10314 fputc_unfiltered (c, outbuf);
10320 static VEC(mem_region_s) *
10321 remote_memory_map (struct target_ops *ops)
10323 VEC(mem_region_s) *result = NULL;
10324 char *text = target_read_stralloc (¤t_target,
10325 TARGET_OBJECT_MEMORY_MAP, NULL);
10329 struct cleanup *back_to = make_cleanup (xfree, text);
10331 result = parse_memory_map (text);
10332 do_cleanups (back_to);
10339 packet_command (char *args, int from_tty)
10341 struct remote_state *rs = get_remote_state ();
10343 if (!rs->remote_desc)
10344 error (_("command can only be used with remote target"));
10347 error (_("remote-packet command requires packet text as argument"));
10349 puts_filtered ("sending: ");
10350 print_packet (args);
10351 puts_filtered ("\n");
10354 getpkt (&rs->buf, &rs->buf_size, 0);
10355 puts_filtered ("received: ");
10356 print_packet (rs->buf);
10357 puts_filtered ("\n");
10361 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10363 static void display_thread_info (struct gdb_ext_thread_info *info);
10365 static void threadset_test_cmd (char *cmd, int tty);
10367 static void threadalive_test (char *cmd, int tty);
10369 static void threadlist_test_cmd (char *cmd, int tty);
10371 int get_and_display_threadinfo (threadref *ref);
10373 static void threadinfo_test_cmd (char *cmd, int tty);
10375 static int thread_display_step (threadref *ref, void *context);
10377 static void threadlist_update_test_cmd (char *cmd, int tty);
10379 static void init_remote_threadtests (void);
10381 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10384 threadset_test_cmd (char *cmd, int tty)
10386 int sample_thread = SAMPLE_THREAD;
10388 printf_filtered (_("Remote threadset test\n"));
10389 set_general_thread (sample_thread);
10394 threadalive_test (char *cmd, int tty)
10396 int sample_thread = SAMPLE_THREAD;
10397 int pid = ptid_get_pid (inferior_ptid);
10398 ptid_t ptid = ptid_build (pid, sample_thread, 0);
10400 if (remote_thread_alive (ptid))
10401 printf_filtered ("PASS: Thread alive test\n");
10403 printf_filtered ("FAIL: Thread alive test\n");
10406 void output_threadid (char *title, threadref *ref);
10409 output_threadid (char *title, threadref *ref)
10413 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
10415 printf_filtered ("%s %s\n", title, (&hexid[0]));
10419 threadlist_test_cmd (char *cmd, int tty)
10422 threadref nextthread;
10423 int done, result_count;
10424 threadref threadlist[3];
10426 printf_filtered ("Remote Threadlist test\n");
10427 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
10428 &result_count, &threadlist[0]))
10429 printf_filtered ("FAIL: threadlist test\n");
10432 threadref *scan = threadlist;
10433 threadref *limit = scan + result_count;
10435 while (scan < limit)
10436 output_threadid (" thread ", scan++);
10441 display_thread_info (struct gdb_ext_thread_info *info)
10443 output_threadid ("Threadid: ", &info->threadid);
10444 printf_filtered ("Name: %s\n ", info->shortname);
10445 printf_filtered ("State: %s\n", info->display);
10446 printf_filtered ("other: %s\n\n", info->more_display);
10450 get_and_display_threadinfo (threadref *ref)
10454 struct gdb_ext_thread_info threadinfo;
10456 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
10457 | TAG_MOREDISPLAY | TAG_DISPLAY;
10458 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
10459 display_thread_info (&threadinfo);
10464 threadinfo_test_cmd (char *cmd, int tty)
10466 int athread = SAMPLE_THREAD;
10470 int_to_threadref (&thread, athread);
10471 printf_filtered ("Remote Threadinfo test\n");
10472 if (!get_and_display_threadinfo (&thread))
10473 printf_filtered ("FAIL cannot get thread info\n");
10477 thread_display_step (threadref *ref, void *context)
10479 /* output_threadid(" threadstep ",ref); *//* simple test */
10480 return get_and_display_threadinfo (ref);
10484 threadlist_update_test_cmd (char *cmd, int tty)
10486 printf_filtered ("Remote Threadlist update test\n");
10487 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
10491 init_remote_threadtests (void)
10493 add_com ("tlist", class_obscure, threadlist_test_cmd,
10494 _("Fetch and print the remote list of "
10495 "thread identifiers, one pkt only"));
10496 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
10497 _("Fetch and display info about one thread"));
10498 add_com ("tset", class_obscure, threadset_test_cmd,
10499 _("Test setting to a different thread"));
10500 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
10501 _("Iterate through updating all remote thread info"));
10502 add_com ("talive", class_obscure, threadalive_test,
10503 _(" Remote thread alive test "));
10508 /* Convert a thread ID to a string. Returns the string in a static
10512 remote_pid_to_str (struct target_ops *ops, ptid_t ptid)
10514 static char buf[64];
10515 struct remote_state *rs = get_remote_state ();
10517 if (ptid_equal (ptid, null_ptid))
10518 return normal_pid_to_str (ptid);
10519 else if (ptid_is_pid (ptid))
10521 /* Printing an inferior target id. */
10523 /* When multi-process extensions are off, there's no way in the
10524 remote protocol to know the remote process id, if there's any
10525 at all. There's one exception --- when we're connected with
10526 target extended-remote, and we manually attached to a process
10527 with "attach PID". We don't record anywhere a flag that
10528 allows us to distinguish that case from the case of
10529 connecting with extended-remote and the stub already being
10530 attached to a process, and reporting yes to qAttached, hence
10531 no smart special casing here. */
10532 if (!remote_multi_process_p (rs))
10534 xsnprintf (buf, sizeof buf, "Remote target");
10538 return normal_pid_to_str (ptid);
10542 if (ptid_equal (magic_null_ptid, ptid))
10543 xsnprintf (buf, sizeof buf, "Thread <main>");
10544 else if (remote_multi_process_p (rs))
10545 if (ptid_get_lwp (ptid) == 0)
10546 return normal_pid_to_str (ptid);
10548 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
10549 ptid_get_pid (ptid), ptid_get_lwp (ptid));
10551 xsnprintf (buf, sizeof buf, "Thread %ld",
10552 ptid_get_lwp (ptid));
10557 /* Get the address of the thread local variable in OBJFILE which is
10558 stored at OFFSET within the thread local storage for thread PTID. */
10561 remote_get_thread_local_address (struct target_ops *ops,
10562 ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
10564 if (packet_support (PACKET_qGetTLSAddr) != PACKET_DISABLE)
10566 struct remote_state *rs = get_remote_state ();
10568 char *endp = rs->buf + get_remote_packet_size ();
10569 enum packet_result result;
10571 strcpy (p, "qGetTLSAddr:");
10573 p = write_ptid (p, endp, ptid);
10575 p += hexnumstr (p, offset);
10577 p += hexnumstr (p, lm);
10581 getpkt (&rs->buf, &rs->buf_size, 0);
10582 result = packet_ok (rs->buf,
10583 &remote_protocol_packets[PACKET_qGetTLSAddr]);
10584 if (result == PACKET_OK)
10588 unpack_varlen_hex (rs->buf, &result);
10591 else if (result == PACKET_UNKNOWN)
10592 throw_error (TLS_GENERIC_ERROR,
10593 _("Remote target doesn't support qGetTLSAddr packet"));
10595 throw_error (TLS_GENERIC_ERROR,
10596 _("Remote target failed to process qGetTLSAddr request"));
10599 throw_error (TLS_GENERIC_ERROR,
10600 _("TLS not supported or disabled on this target"));
10605 /* Provide thread local base, i.e. Thread Information Block address.
10606 Returns 1 if ptid is found and thread_local_base is non zero. */
10609 remote_get_tib_address (struct target_ops *self, ptid_t ptid, CORE_ADDR *addr)
10611 if (packet_support (PACKET_qGetTIBAddr) != PACKET_DISABLE)
10613 struct remote_state *rs = get_remote_state ();
10615 char *endp = rs->buf + get_remote_packet_size ();
10616 enum packet_result result;
10618 strcpy (p, "qGetTIBAddr:");
10620 p = write_ptid (p, endp, ptid);
10624 getpkt (&rs->buf, &rs->buf_size, 0);
10625 result = packet_ok (rs->buf,
10626 &remote_protocol_packets[PACKET_qGetTIBAddr]);
10627 if (result == PACKET_OK)
10631 unpack_varlen_hex (rs->buf, &result);
10633 *addr = (CORE_ADDR) result;
10636 else if (result == PACKET_UNKNOWN)
10637 error (_("Remote target doesn't support qGetTIBAddr packet"));
10639 error (_("Remote target failed to process qGetTIBAddr request"));
10642 error (_("qGetTIBAddr not supported or disabled on this target"));
10647 /* Support for inferring a target description based on the current
10648 architecture and the size of a 'g' packet. While the 'g' packet
10649 can have any size (since optional registers can be left off the
10650 end), some sizes are easily recognizable given knowledge of the
10651 approximate architecture. */
10653 struct remote_g_packet_guess
10656 const struct target_desc *tdesc;
10658 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
10659 DEF_VEC_O(remote_g_packet_guess_s);
10661 struct remote_g_packet_data
10663 VEC(remote_g_packet_guess_s) *guesses;
10666 static struct gdbarch_data *remote_g_packet_data_handle;
10669 remote_g_packet_data_init (struct obstack *obstack)
10671 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
10675 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
10676 const struct target_desc *tdesc)
10678 struct remote_g_packet_data *data
10679 = ((struct remote_g_packet_data *)
10680 gdbarch_data (gdbarch, remote_g_packet_data_handle));
10681 struct remote_g_packet_guess new_guess, *guess;
10684 gdb_assert (tdesc != NULL);
10687 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
10689 if (guess->bytes == bytes)
10690 internal_error (__FILE__, __LINE__,
10691 _("Duplicate g packet description added for size %d"),
10694 new_guess.bytes = bytes;
10695 new_guess.tdesc = tdesc;
10696 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
10699 /* Return 1 if remote_read_description would do anything on this target
10700 and architecture, 0 otherwise. */
10703 remote_read_description_p (struct target_ops *target)
10705 struct remote_g_packet_data *data
10706 = ((struct remote_g_packet_data *)
10707 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
10709 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
10715 static const struct target_desc *
10716 remote_read_description (struct target_ops *target)
10718 struct remote_g_packet_data *data
10719 = ((struct remote_g_packet_data *)
10720 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
10722 /* Do not try this during initial connection, when we do not know
10723 whether there is a running but stopped thread. */
10724 if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
10725 return target->beneath->to_read_description (target->beneath);
10727 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
10729 struct remote_g_packet_guess *guess;
10731 int bytes = send_g_packet ();
10734 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
10736 if (guess->bytes == bytes)
10737 return guess->tdesc;
10739 /* We discard the g packet. A minor optimization would be to
10740 hold on to it, and fill the register cache once we have selected
10741 an architecture, but it's too tricky to do safely. */
10744 return target->beneath->to_read_description (target->beneath);
10747 /* Remote file transfer support. This is host-initiated I/O, not
10748 target-initiated; for target-initiated, see remote-fileio.c. */
10750 /* If *LEFT is at least the length of STRING, copy STRING to
10751 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10752 decrease *LEFT. Otherwise raise an error. */
10755 remote_buffer_add_string (char **buffer, int *left, char *string)
10757 int len = strlen (string);
10760 error (_("Packet too long for target."));
10762 memcpy (*buffer, string, len);
10766 /* NUL-terminate the buffer as a convenience, if there is
10772 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
10773 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10774 decrease *LEFT. Otherwise raise an error. */
10777 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
10780 if (2 * len > *left)
10781 error (_("Packet too long for target."));
10783 bin2hex (bytes, *buffer, len);
10784 *buffer += 2 * len;
10787 /* NUL-terminate the buffer as a convenience, if there is
10793 /* If *LEFT is large enough, convert VALUE to hex and add it to
10794 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10795 decrease *LEFT. Otherwise raise an error. */
10798 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
10800 int len = hexnumlen (value);
10803 error (_("Packet too long for target."));
10805 hexnumstr (*buffer, value);
10809 /* NUL-terminate the buffer as a convenience, if there is
10815 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
10816 value, *REMOTE_ERRNO to the remote error number or zero if none
10817 was included, and *ATTACHMENT to point to the start of the annex
10818 if any. The length of the packet isn't needed here; there may
10819 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
10821 Return 0 if the packet could be parsed, -1 if it could not. If
10822 -1 is returned, the other variables may not be initialized. */
10825 remote_hostio_parse_result (char *buffer, int *retcode,
10826 int *remote_errno, char **attachment)
10831 *attachment = NULL;
10833 if (buffer[0] != 'F')
10837 *retcode = strtol (&buffer[1], &p, 16);
10838 if (errno != 0 || p == &buffer[1])
10841 /* Check for ",errno". */
10845 *remote_errno = strtol (p + 1, &p2, 16);
10846 if (errno != 0 || p + 1 == p2)
10851 /* Check for ";attachment". If there is no attachment, the
10852 packet should end here. */
10855 *attachment = p + 1;
10858 else if (*p == '\0')
10864 /* Send a prepared I/O packet to the target and read its response.
10865 The prepared packet is in the global RS->BUF before this function
10866 is called, and the answer is there when we return.
10868 COMMAND_BYTES is the length of the request to send, which may include
10869 binary data. WHICH_PACKET is the packet configuration to check
10870 before attempting a packet. If an error occurs, *REMOTE_ERRNO
10871 is set to the error number and -1 is returned. Otherwise the value
10872 returned by the function is returned.
10874 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
10875 attachment is expected; an error will be reported if there's a
10876 mismatch. If one is found, *ATTACHMENT will be set to point into
10877 the packet buffer and *ATTACHMENT_LEN will be set to the
10878 attachment's length. */
10881 remote_hostio_send_command (int command_bytes, int which_packet,
10882 int *remote_errno, char **attachment,
10883 int *attachment_len)
10885 struct remote_state *rs = get_remote_state ();
10886 int ret, bytes_read;
10887 char *attachment_tmp;
10889 if (!rs->remote_desc
10890 || packet_support (which_packet) == PACKET_DISABLE)
10892 *remote_errno = FILEIO_ENOSYS;
10896 putpkt_binary (rs->buf, command_bytes);
10897 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
10899 /* If it timed out, something is wrong. Don't try to parse the
10901 if (bytes_read < 0)
10903 *remote_errno = FILEIO_EINVAL;
10907 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
10910 *remote_errno = FILEIO_EINVAL;
10912 case PACKET_UNKNOWN:
10913 *remote_errno = FILEIO_ENOSYS;
10919 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
10922 *remote_errno = FILEIO_EINVAL;
10926 /* Make sure we saw an attachment if and only if we expected one. */
10927 if ((attachment_tmp == NULL && attachment != NULL)
10928 || (attachment_tmp != NULL && attachment == NULL))
10930 *remote_errno = FILEIO_EINVAL;
10934 /* If an attachment was found, it must point into the packet buffer;
10935 work out how many bytes there were. */
10936 if (attachment_tmp != NULL)
10938 *attachment = attachment_tmp;
10939 *attachment_len = bytes_read - (*attachment - rs->buf);
10945 /* Invalidate the readahead cache. */
10948 readahead_cache_invalidate (void)
10950 struct remote_state *rs = get_remote_state ();
10952 rs->readahead_cache.fd = -1;
10955 /* Invalidate the readahead cache if it is holding data for FD. */
10958 readahead_cache_invalidate_fd (int fd)
10960 struct remote_state *rs = get_remote_state ();
10962 if (rs->readahead_cache.fd == fd)
10963 rs->readahead_cache.fd = -1;
10966 /* Set the filesystem remote_hostio functions that take FILENAME
10967 arguments will use. Return 0 on success, or -1 if an error
10968 occurs (and set *REMOTE_ERRNO). */
10971 remote_hostio_set_filesystem (struct inferior *inf, int *remote_errno)
10973 struct remote_state *rs = get_remote_state ();
10974 int required_pid = (inf == NULL || inf->fake_pid_p) ? 0 : inf->pid;
10976 int left = get_remote_packet_size () - 1;
10980 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
10983 if (rs->fs_pid != -1 && required_pid == rs->fs_pid)
10986 remote_buffer_add_string (&p, &left, "vFile:setfs:");
10988 xsnprintf (arg, sizeof (arg), "%x", required_pid);
10989 remote_buffer_add_string (&p, &left, arg);
10991 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_setfs,
10992 remote_errno, NULL, NULL);
10994 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
10998 rs->fs_pid = required_pid;
11003 /* Implementation of to_fileio_open. */
11006 remote_hostio_open (struct target_ops *self,
11007 struct inferior *inf, const char *filename,
11008 int flags, int mode, int warn_if_slow,
11011 struct remote_state *rs = get_remote_state ();
11013 int left = get_remote_packet_size () - 1;
11017 static int warning_issued = 0;
11019 printf_unfiltered (_("Reading %s from remote target...\n"),
11022 if (!warning_issued)
11024 warning (_("File transfers from remote targets can be slow."
11025 " Use \"set sysroot\" to access files locally"
11027 warning_issued = 1;
11031 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11034 remote_buffer_add_string (&p, &left, "vFile:open:");
11036 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11037 strlen (filename));
11038 remote_buffer_add_string (&p, &left, ",");
11040 remote_buffer_add_int (&p, &left, flags);
11041 remote_buffer_add_string (&p, &left, ",");
11043 remote_buffer_add_int (&p, &left, mode);
11045 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
11046 remote_errno, NULL, NULL);
11049 /* Implementation of to_fileio_pwrite. */
11052 remote_hostio_pwrite (struct target_ops *self,
11053 int fd, const gdb_byte *write_buf, int len,
11054 ULONGEST offset, int *remote_errno)
11056 struct remote_state *rs = get_remote_state ();
11058 int left = get_remote_packet_size ();
11061 readahead_cache_invalidate_fd (fd);
11063 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
11065 remote_buffer_add_int (&p, &left, fd);
11066 remote_buffer_add_string (&p, &left, ",");
11068 remote_buffer_add_int (&p, &left, offset);
11069 remote_buffer_add_string (&p, &left, ",");
11071 p += remote_escape_output (write_buf, len, 1, (gdb_byte *) p, &out_len,
11072 get_remote_packet_size () - (p - rs->buf));
11074 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
11075 remote_errno, NULL, NULL);
11078 /* Helper for the implementation of to_fileio_pread. Read the file
11079 from the remote side with vFile:pread. */
11082 remote_hostio_pread_vFile (struct target_ops *self,
11083 int fd, gdb_byte *read_buf, int len,
11084 ULONGEST offset, int *remote_errno)
11086 struct remote_state *rs = get_remote_state ();
11089 int left = get_remote_packet_size ();
11090 int ret, attachment_len;
11093 remote_buffer_add_string (&p, &left, "vFile:pread:");
11095 remote_buffer_add_int (&p, &left, fd);
11096 remote_buffer_add_string (&p, &left, ",");
11098 remote_buffer_add_int (&p, &left, len);
11099 remote_buffer_add_string (&p, &left, ",");
11101 remote_buffer_add_int (&p, &left, offset);
11103 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
11104 remote_errno, &attachment,
11110 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11112 if (read_len != ret)
11113 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
11118 /* Serve pread from the readahead cache. Returns number of bytes
11119 read, or 0 if the request can't be served from the cache. */
11122 remote_hostio_pread_from_cache (struct remote_state *rs,
11123 int fd, gdb_byte *read_buf, size_t len,
11126 struct readahead_cache *cache = &rs->readahead_cache;
11128 if (cache->fd == fd
11129 && cache->offset <= offset
11130 && offset < cache->offset + cache->bufsize)
11132 ULONGEST max = cache->offset + cache->bufsize;
11134 if (offset + len > max)
11135 len = max - offset;
11137 memcpy (read_buf, cache->buf + offset - cache->offset, len);
11144 /* Implementation of to_fileio_pread. */
11147 remote_hostio_pread (struct target_ops *self,
11148 int fd, gdb_byte *read_buf, int len,
11149 ULONGEST offset, int *remote_errno)
11152 struct remote_state *rs = get_remote_state ();
11153 struct readahead_cache *cache = &rs->readahead_cache;
11155 ret = remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset);
11158 cache->hit_count++;
11161 fprintf_unfiltered (gdb_stdlog, "readahead cache hit %s\n",
11162 pulongest (cache->hit_count));
11166 cache->miss_count++;
11168 fprintf_unfiltered (gdb_stdlog, "readahead cache miss %s\n",
11169 pulongest (cache->miss_count));
11172 cache->offset = offset;
11173 cache->bufsize = get_remote_packet_size ();
11174 cache->buf = (gdb_byte *) xrealloc (cache->buf, cache->bufsize);
11176 ret = remote_hostio_pread_vFile (self, cache->fd, cache->buf, cache->bufsize,
11177 cache->offset, remote_errno);
11180 readahead_cache_invalidate_fd (fd);
11184 cache->bufsize = ret;
11185 return remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset);
11188 /* Implementation of to_fileio_close. */
11191 remote_hostio_close (struct target_ops *self, int fd, int *remote_errno)
11193 struct remote_state *rs = get_remote_state ();
11195 int left = get_remote_packet_size () - 1;
11197 readahead_cache_invalidate_fd (fd);
11199 remote_buffer_add_string (&p, &left, "vFile:close:");
11201 remote_buffer_add_int (&p, &left, fd);
11203 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
11204 remote_errno, NULL, NULL);
11207 /* Implementation of to_fileio_unlink. */
11210 remote_hostio_unlink (struct target_ops *self,
11211 struct inferior *inf, const char *filename,
11214 struct remote_state *rs = get_remote_state ();
11216 int left = get_remote_packet_size () - 1;
11218 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11221 remote_buffer_add_string (&p, &left, "vFile:unlink:");
11223 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11224 strlen (filename));
11226 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
11227 remote_errno, NULL, NULL);
11230 /* Implementation of to_fileio_readlink. */
11233 remote_hostio_readlink (struct target_ops *self,
11234 struct inferior *inf, const char *filename,
11237 struct remote_state *rs = get_remote_state ();
11240 int left = get_remote_packet_size ();
11241 int len, attachment_len;
11245 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11248 remote_buffer_add_string (&p, &left, "vFile:readlink:");
11250 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11251 strlen (filename));
11253 len = remote_hostio_send_command (p - rs->buf, PACKET_vFile_readlink,
11254 remote_errno, &attachment,
11260 ret = (char *) xmalloc (len + 1);
11262 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11263 (gdb_byte *) ret, len);
11264 if (read_len != len)
11265 error (_("Readlink returned %d, but %d bytes."), len, read_len);
11271 /* Implementation of to_fileio_fstat. */
11274 remote_hostio_fstat (struct target_ops *self,
11275 int fd, struct stat *st,
11278 struct remote_state *rs = get_remote_state ();
11280 int left = get_remote_packet_size ();
11281 int attachment_len, ret;
11283 struct fio_stat fst;
11286 remote_buffer_add_string (&p, &left, "vFile:fstat:");
11288 remote_buffer_add_int (&p, &left, fd);
11290 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_fstat,
11291 remote_errno, &attachment,
11295 if (*remote_errno != FILEIO_ENOSYS)
11298 /* Strictly we should return -1, ENOSYS here, but when
11299 "set sysroot remote:" was implemented in August 2008
11300 BFD's need for a stat function was sidestepped with
11301 this hack. This was not remedied until March 2015
11302 so we retain the previous behavior to avoid breaking
11305 Note that the memset is a March 2015 addition; older
11306 GDBs set st_size *and nothing else* so the structure
11307 would have garbage in all other fields. This might
11308 break something but retaining the previous behavior
11309 here would be just too wrong. */
11311 memset (st, 0, sizeof (struct stat));
11312 st->st_size = INT_MAX;
11316 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11317 (gdb_byte *) &fst, sizeof (fst));
11319 if (read_len != ret)
11320 error (_("vFile:fstat returned %d, but %d bytes."), ret, read_len);
11322 if (read_len != sizeof (fst))
11323 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11324 read_len, (int) sizeof (fst));
11326 remote_fileio_to_host_stat (&fst, st);
11331 /* Implementation of to_filesystem_is_local. */
11334 remote_filesystem_is_local (struct target_ops *self)
11336 /* Valgrind GDB presents itself as a remote target but works
11337 on the local filesystem: it does not implement remote get
11338 and users are not expected to set a sysroot. To handle
11339 this case we treat the remote filesystem as local if the
11340 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11341 does not support vFile:open. */
11342 if (strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) == 0)
11344 enum packet_support ps = packet_support (PACKET_vFile_open);
11346 if (ps == PACKET_SUPPORT_UNKNOWN)
11348 int fd, remote_errno;
11350 /* Try opening a file to probe support. The supplied
11351 filename is irrelevant, we only care about whether
11352 the stub recognizes the packet or not. */
11353 fd = remote_hostio_open (self, NULL, "just probing",
11354 FILEIO_O_RDONLY, 0700, 0,
11358 remote_hostio_close (self, fd, &remote_errno);
11360 ps = packet_support (PACKET_vFile_open);
11363 if (ps == PACKET_DISABLE)
11365 static int warning_issued = 0;
11367 if (!warning_issued)
11369 warning (_("remote target does not support file"
11370 " transfer, attempting to access files"
11371 " from local filesystem."));
11372 warning_issued = 1;
11383 remote_fileio_errno_to_host (int errnum)
11389 case FILEIO_ENOENT:
11397 case FILEIO_EACCES:
11399 case FILEIO_EFAULT:
11403 case FILEIO_EEXIST:
11405 case FILEIO_ENODEV:
11407 case FILEIO_ENOTDIR:
11409 case FILEIO_EISDIR:
11411 case FILEIO_EINVAL:
11413 case FILEIO_ENFILE:
11415 case FILEIO_EMFILE:
11419 case FILEIO_ENOSPC:
11421 case FILEIO_ESPIPE:
11425 case FILEIO_ENOSYS:
11427 case FILEIO_ENAMETOOLONG:
11428 return ENAMETOOLONG;
11434 remote_hostio_error (int errnum)
11436 int host_error = remote_fileio_errno_to_host (errnum);
11438 if (host_error == -1)
11439 error (_("Unknown remote I/O error %d"), errnum);
11441 error (_("Remote I/O error: %s"), safe_strerror (host_error));
11445 remote_hostio_close_cleanup (void *opaque)
11447 int fd = *(int *) opaque;
11450 remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno);
11454 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
11456 struct cleanup *back_to, *close_cleanup;
11457 int retcode, fd, remote_errno, bytes, io_size;
11460 int bytes_in_buffer;
11463 struct remote_state *rs = get_remote_state ();
11465 if (!rs->remote_desc)
11466 error (_("command can only be used with remote target"));
11468 file = gdb_fopen_cloexec (local_file, "rb");
11470 perror_with_name (local_file);
11471 back_to = make_cleanup_fclose (file);
11473 fd = remote_hostio_open (find_target_at (process_stratum), NULL,
11474 remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
11476 0700, 0, &remote_errno);
11478 remote_hostio_error (remote_errno);
11480 /* Send up to this many bytes at once. They won't all fit in the
11481 remote packet limit, so we'll transfer slightly fewer. */
11482 io_size = get_remote_packet_size ();
11483 buffer = (gdb_byte *) xmalloc (io_size);
11484 make_cleanup (xfree, buffer);
11486 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
11488 bytes_in_buffer = 0;
11491 while (bytes_in_buffer || !saw_eof)
11495 bytes = fread (buffer + bytes_in_buffer, 1,
11496 io_size - bytes_in_buffer,
11501 error (_("Error reading %s."), local_file);
11504 /* EOF. Unless there is something still in the
11505 buffer from the last iteration, we are done. */
11507 if (bytes_in_buffer == 0)
11515 bytes += bytes_in_buffer;
11516 bytes_in_buffer = 0;
11518 retcode = remote_hostio_pwrite (find_target_at (process_stratum),
11520 offset, &remote_errno);
11523 remote_hostio_error (remote_errno);
11524 else if (retcode == 0)
11525 error (_("Remote write of %d bytes returned 0!"), bytes);
11526 else if (retcode < bytes)
11528 /* Short write. Save the rest of the read data for the next
11530 bytes_in_buffer = bytes - retcode;
11531 memmove (buffer, buffer + retcode, bytes_in_buffer);
11537 discard_cleanups (close_cleanup);
11538 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
11539 remote_hostio_error (remote_errno);
11542 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
11543 do_cleanups (back_to);
11547 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
11549 struct cleanup *back_to, *close_cleanup;
11550 int fd, remote_errno, bytes, io_size;
11554 struct remote_state *rs = get_remote_state ();
11556 if (!rs->remote_desc)
11557 error (_("command can only be used with remote target"));
11559 fd = remote_hostio_open (find_target_at (process_stratum), NULL,
11560 remote_file, FILEIO_O_RDONLY, 0, 0,
11563 remote_hostio_error (remote_errno);
11565 file = gdb_fopen_cloexec (local_file, "wb");
11567 perror_with_name (local_file);
11568 back_to = make_cleanup_fclose (file);
11570 /* Send up to this many bytes at once. They won't all fit in the
11571 remote packet limit, so we'll transfer slightly fewer. */
11572 io_size = get_remote_packet_size ();
11573 buffer = (gdb_byte *) xmalloc (io_size);
11574 make_cleanup (xfree, buffer);
11576 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
11581 bytes = remote_hostio_pread (find_target_at (process_stratum),
11582 fd, buffer, io_size, offset, &remote_errno);
11584 /* Success, but no bytes, means end-of-file. */
11587 remote_hostio_error (remote_errno);
11591 bytes = fwrite (buffer, 1, bytes, file);
11593 perror_with_name (local_file);
11596 discard_cleanups (close_cleanup);
11597 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
11598 remote_hostio_error (remote_errno);
11601 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
11602 do_cleanups (back_to);
11606 remote_file_delete (const char *remote_file, int from_tty)
11608 int retcode, remote_errno;
11609 struct remote_state *rs = get_remote_state ();
11611 if (!rs->remote_desc)
11612 error (_("command can only be used with remote target"));
11614 retcode = remote_hostio_unlink (find_target_at (process_stratum),
11615 NULL, remote_file, &remote_errno);
11617 remote_hostio_error (remote_errno);
11620 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
11624 remote_put_command (char *args, int from_tty)
11626 struct cleanup *back_to;
11630 error_no_arg (_("file to put"));
11632 argv = gdb_buildargv (args);
11633 back_to = make_cleanup_freeargv (argv);
11634 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
11635 error (_("Invalid parameters to remote put"));
11637 remote_file_put (argv[0], argv[1], from_tty);
11639 do_cleanups (back_to);
11643 remote_get_command (char *args, int from_tty)
11645 struct cleanup *back_to;
11649 error_no_arg (_("file to get"));
11651 argv = gdb_buildargv (args);
11652 back_to = make_cleanup_freeargv (argv);
11653 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
11654 error (_("Invalid parameters to remote get"));
11656 remote_file_get (argv[0], argv[1], from_tty);
11658 do_cleanups (back_to);
11662 remote_delete_command (char *args, int from_tty)
11664 struct cleanup *back_to;
11668 error_no_arg (_("file to delete"));
11670 argv = gdb_buildargv (args);
11671 back_to = make_cleanup_freeargv (argv);
11672 if (argv[0] == NULL || argv[1] != NULL)
11673 error (_("Invalid parameters to remote delete"));
11675 remote_file_delete (argv[0], from_tty);
11677 do_cleanups (back_to);
11681 remote_command (char *args, int from_tty)
11683 help_list (remote_cmdlist, "remote ", all_commands, gdb_stdout);
11687 remote_can_execute_reverse (struct target_ops *self)
11689 if (packet_support (PACKET_bs) == PACKET_ENABLE
11690 || packet_support (PACKET_bc) == PACKET_ENABLE)
11697 remote_supports_non_stop (struct target_ops *self)
11703 remote_supports_disable_randomization (struct target_ops *self)
11705 /* Only supported in extended mode. */
11710 remote_supports_multi_process (struct target_ops *self)
11712 struct remote_state *rs = get_remote_state ();
11714 return remote_multi_process_p (rs);
11718 remote_supports_cond_tracepoints (void)
11720 return packet_support (PACKET_ConditionalTracepoints) == PACKET_ENABLE;
11724 remote_supports_cond_breakpoints (struct target_ops *self)
11726 return packet_support (PACKET_ConditionalBreakpoints) == PACKET_ENABLE;
11730 remote_supports_fast_tracepoints (void)
11732 return packet_support (PACKET_FastTracepoints) == PACKET_ENABLE;
11736 remote_supports_static_tracepoints (void)
11738 return packet_support (PACKET_StaticTracepoints) == PACKET_ENABLE;
11742 remote_supports_install_in_trace (void)
11744 return packet_support (PACKET_InstallInTrace) == PACKET_ENABLE;
11748 remote_supports_enable_disable_tracepoint (struct target_ops *self)
11750 return (packet_support (PACKET_EnableDisableTracepoints_feature)
11755 remote_supports_string_tracing (struct target_ops *self)
11757 return packet_support (PACKET_tracenz_feature) == PACKET_ENABLE;
11761 remote_can_run_breakpoint_commands (struct target_ops *self)
11763 return packet_support (PACKET_BreakpointCommands) == PACKET_ENABLE;
11767 remote_trace_init (struct target_ops *self)
11770 remote_get_noisy_reply (&target_buf, &target_buf_size);
11771 if (strcmp (target_buf, "OK") != 0)
11772 error (_("Target does not support this command."));
11775 static void free_actions_list (char **actions_list);
11776 static void free_actions_list_cleanup_wrapper (void *);
11778 free_actions_list_cleanup_wrapper (void *al)
11780 free_actions_list ((char **) al);
11784 free_actions_list (char **actions_list)
11788 if (actions_list == 0)
11791 for (ndx = 0; actions_list[ndx]; ndx++)
11792 xfree (actions_list[ndx]);
11794 xfree (actions_list);
11797 /* Recursive routine to walk through command list including loops, and
11798 download packets for each command. */
11801 remote_download_command_source (int num, ULONGEST addr,
11802 struct command_line *cmds)
11804 struct remote_state *rs = get_remote_state ();
11805 struct command_line *cmd;
11807 for (cmd = cmds; cmd; cmd = cmd->next)
11809 QUIT; /* Allow user to bail out with ^C. */
11810 strcpy (rs->buf, "QTDPsrc:");
11811 encode_source_string (num, addr, "cmd", cmd->line,
11812 rs->buf + strlen (rs->buf),
11813 rs->buf_size - strlen (rs->buf));
11815 remote_get_noisy_reply (&target_buf, &target_buf_size);
11816 if (strcmp (target_buf, "OK"))
11817 warning (_("Target does not support source download."));
11819 if (cmd->control_type == while_control
11820 || cmd->control_type == while_stepping_control)
11822 remote_download_command_source (num, addr, *cmd->body_list);
11824 QUIT; /* Allow user to bail out with ^C. */
11825 strcpy (rs->buf, "QTDPsrc:");
11826 encode_source_string (num, addr, "cmd", "end",
11827 rs->buf + strlen (rs->buf),
11828 rs->buf_size - strlen (rs->buf));
11830 remote_get_noisy_reply (&target_buf, &target_buf_size);
11831 if (strcmp (target_buf, "OK"))
11832 warning (_("Target does not support source download."));
11838 remote_download_tracepoint (struct target_ops *self, struct bp_location *loc)
11840 #define BUF_SIZE 2048
11844 char buf[BUF_SIZE];
11845 char **tdp_actions;
11846 char **stepping_actions;
11848 struct cleanup *old_chain = NULL;
11849 struct agent_expr *aexpr;
11850 struct cleanup *aexpr_chain = NULL;
11852 struct breakpoint *b = loc->owner;
11853 struct tracepoint *t = (struct tracepoint *) b;
11855 encode_actions_rsp (loc, &tdp_actions, &stepping_actions);
11856 old_chain = make_cleanup (free_actions_list_cleanup_wrapper,
11858 (void) make_cleanup (free_actions_list_cleanup_wrapper,
11861 tpaddr = loc->address;
11862 sprintf_vma (addrbuf, tpaddr);
11863 xsnprintf (buf, BUF_SIZE, "QTDP:%x:%s:%c:%lx:%x", b->number,
11864 addrbuf, /* address */
11865 (b->enable_state == bp_enabled ? 'E' : 'D'),
11866 t->step_count, t->pass_count);
11867 /* Fast tracepoints are mostly handled by the target, but we can
11868 tell the target how big of an instruction block should be moved
11870 if (b->type == bp_fast_tracepoint)
11872 /* Only test for support at download time; we may not know
11873 target capabilities at definition time. */
11874 if (remote_supports_fast_tracepoints ())
11876 if (gdbarch_fast_tracepoint_valid_at (loc->gdbarch, tpaddr,
11878 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":F%x",
11879 gdb_insn_length (loc->gdbarch, tpaddr));
11881 /* If it passed validation at definition but fails now,
11882 something is very wrong. */
11883 internal_error (__FILE__, __LINE__,
11884 _("Fast tracepoint not "
11885 "valid during download"));
11888 /* Fast tracepoints are functionally identical to regular
11889 tracepoints, so don't take lack of support as a reason to
11890 give up on the trace run. */
11891 warning (_("Target does not support fast tracepoints, "
11892 "downloading %d as regular tracepoint"), b->number);
11894 else if (b->type == bp_static_tracepoint)
11896 /* Only test for support at download time; we may not know
11897 target capabilities at definition time. */
11898 if (remote_supports_static_tracepoints ())
11900 struct static_tracepoint_marker marker;
11902 if (target_static_tracepoint_marker_at (tpaddr, &marker))
11903 strcat (buf, ":S");
11905 error (_("Static tracepoint not valid during download"));
11908 /* Fast tracepoints are functionally identical to regular
11909 tracepoints, so don't take lack of support as a reason
11910 to give up on the trace run. */
11911 error (_("Target does not support static tracepoints"));
11913 /* If the tracepoint has a conditional, make it into an agent
11914 expression and append to the definition. */
11917 /* Only test support at download time, we may not know target
11918 capabilities at definition time. */
11919 if (remote_supports_cond_tracepoints ())
11921 aexpr = gen_eval_for_expr (tpaddr, loc->cond);
11922 aexpr_chain = make_cleanup_free_agent_expr (aexpr);
11923 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":X%x,",
11925 pkt = buf + strlen (buf);
11926 for (ndx = 0; ndx < aexpr->len; ++ndx)
11927 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
11929 do_cleanups (aexpr_chain);
11932 warning (_("Target does not support conditional tracepoints, "
11933 "ignoring tp %d cond"), b->number);
11936 if (b->commands || *default_collect)
11939 remote_get_noisy_reply (&target_buf, &target_buf_size);
11940 if (strcmp (target_buf, "OK"))
11941 error (_("Target does not support tracepoints."));
11943 /* do_single_steps (t); */
11946 for (ndx = 0; tdp_actions[ndx]; ndx++)
11948 QUIT; /* Allow user to bail out with ^C. */
11949 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%c",
11950 b->number, addrbuf, /* address */
11952 ((tdp_actions[ndx + 1] || stepping_actions)
11955 remote_get_noisy_reply (&target_buf,
11957 if (strcmp (target_buf, "OK"))
11958 error (_("Error on target while setting tracepoints."));
11961 if (stepping_actions)
11963 for (ndx = 0; stepping_actions[ndx]; ndx++)
11965 QUIT; /* Allow user to bail out with ^C. */
11966 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%s%s",
11967 b->number, addrbuf, /* address */
11968 ((ndx == 0) ? "S" : ""),
11969 stepping_actions[ndx],
11970 (stepping_actions[ndx + 1] ? "-" : ""));
11972 remote_get_noisy_reply (&target_buf,
11974 if (strcmp (target_buf, "OK"))
11975 error (_("Error on target while setting tracepoints."));
11979 if (packet_support (PACKET_TracepointSource) == PACKET_ENABLE)
11981 if (b->location != NULL)
11983 strcpy (buf, "QTDPsrc:");
11984 encode_source_string (b->number, loc->address, "at",
11985 event_location_to_string (b->location),
11986 buf + strlen (buf), 2048 - strlen (buf));
11988 remote_get_noisy_reply (&target_buf, &target_buf_size);
11989 if (strcmp (target_buf, "OK"))
11990 warning (_("Target does not support source download."));
11992 if (b->cond_string)
11994 strcpy (buf, "QTDPsrc:");
11995 encode_source_string (b->number, loc->address,
11996 "cond", b->cond_string, buf + strlen (buf),
11997 2048 - strlen (buf));
11999 remote_get_noisy_reply (&target_buf, &target_buf_size);
12000 if (strcmp (target_buf, "OK"))
12001 warning (_("Target does not support source download."));
12003 remote_download_command_source (b->number, loc->address,
12004 breakpoint_commands (b));
12007 do_cleanups (old_chain);
12011 remote_can_download_tracepoint (struct target_ops *self)
12013 struct remote_state *rs = get_remote_state ();
12014 struct trace_status *ts;
12017 /* Don't try to install tracepoints until we've relocated our
12018 symbols, and fetched and merged the target's tracepoint list with
12020 if (rs->starting_up)
12023 ts = current_trace_status ();
12024 status = remote_get_trace_status (self, ts);
12026 if (status == -1 || !ts->running_known || !ts->running)
12029 /* If we are in a tracing experiment, but remote stub doesn't support
12030 installing tracepoint in trace, we have to return. */
12031 if (!remote_supports_install_in_trace ())
12039 remote_download_trace_state_variable (struct target_ops *self,
12040 struct trace_state_variable *tsv)
12042 struct remote_state *rs = get_remote_state ();
12045 xsnprintf (rs->buf, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12046 tsv->number, phex ((ULONGEST) tsv->initial_value, 8),
12048 p = rs->buf + strlen (rs->buf);
12049 if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ())
12050 error (_("Trace state variable name too long for tsv definition packet"));
12051 p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, strlen (tsv->name));
12054 remote_get_noisy_reply (&target_buf, &target_buf_size);
12055 if (*target_buf == '\0')
12056 error (_("Target does not support this command."));
12057 if (strcmp (target_buf, "OK") != 0)
12058 error (_("Error on target while downloading trace state variable."));
12062 remote_enable_tracepoint (struct target_ops *self,
12063 struct bp_location *location)
12065 struct remote_state *rs = get_remote_state ();
12068 sprintf_vma (addr_buf, location->address);
12069 xsnprintf (rs->buf, get_remote_packet_size (), "QTEnable:%x:%s",
12070 location->owner->number, addr_buf);
12072 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
12073 if (*rs->buf == '\0')
12074 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12075 if (strcmp (rs->buf, "OK") != 0)
12076 error (_("Error on target while enabling tracepoint."));
12080 remote_disable_tracepoint (struct target_ops *self,
12081 struct bp_location *location)
12083 struct remote_state *rs = get_remote_state ();
12086 sprintf_vma (addr_buf, location->address);
12087 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisable:%x:%s",
12088 location->owner->number, addr_buf);
12090 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
12091 if (*rs->buf == '\0')
12092 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12093 if (strcmp (rs->buf, "OK") != 0)
12094 error (_("Error on target while disabling tracepoint."));
12098 remote_trace_set_readonly_regions (struct target_ops *self)
12102 bfd_size_type size;
12108 return; /* No information to give. */
12110 strcpy (target_buf, "QTro");
12111 offset = strlen (target_buf);
12112 for (s = exec_bfd->sections; s; s = s->next)
12114 char tmp1[40], tmp2[40];
12117 if ((s->flags & SEC_LOAD) == 0 ||
12118 /* (s->flags & SEC_CODE) == 0 || */
12119 (s->flags & SEC_READONLY) == 0)
12123 vma = bfd_get_section_vma (abfd, s);
12124 size = bfd_get_section_size (s);
12125 sprintf_vma (tmp1, vma);
12126 sprintf_vma (tmp2, vma + size);
12127 sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2);
12128 if (offset + sec_length + 1 > target_buf_size)
12130 if (packet_support (PACKET_qXfer_traceframe_info) != PACKET_ENABLE)
12132 Too many sections for read-only sections definition packet."));
12135 xsnprintf (target_buf + offset, target_buf_size - offset, ":%s,%s",
12137 offset += sec_length;
12141 putpkt (target_buf);
12142 getpkt (&target_buf, &target_buf_size, 0);
12147 remote_trace_start (struct target_ops *self)
12149 putpkt ("QTStart");
12150 remote_get_noisy_reply (&target_buf, &target_buf_size);
12151 if (*target_buf == '\0')
12152 error (_("Target does not support this command."));
12153 if (strcmp (target_buf, "OK") != 0)
12154 error (_("Bogus reply from target: %s"), target_buf);
12158 remote_get_trace_status (struct target_ops *self, struct trace_status *ts)
12160 /* Initialize it just to avoid a GCC false warning. */
12162 /* FIXME we need to get register block size some other way. */
12163 extern int trace_regblock_size;
12164 enum packet_result result;
12166 if (packet_support (PACKET_qTStatus) == PACKET_DISABLE)
12169 trace_regblock_size = get_remote_arch_state ()->sizeof_g_packet;
12171 putpkt ("qTStatus");
12175 p = remote_get_noisy_reply (&target_buf, &target_buf_size);
12177 CATCH (ex, RETURN_MASK_ERROR)
12179 if (ex.error != TARGET_CLOSE_ERROR)
12181 exception_fprintf (gdb_stderr, ex, "qTStatus: ");
12184 throw_exception (ex);
12188 result = packet_ok (p, &remote_protocol_packets[PACKET_qTStatus]);
12190 /* If the remote target doesn't do tracing, flag it. */
12191 if (result == PACKET_UNKNOWN)
12194 /* We're working with a live target. */
12195 ts->filename = NULL;
12198 error (_("Bogus trace status reply from target: %s"), target_buf);
12200 /* Function 'parse_trace_status' sets default value of each field of
12201 'ts' at first, so we don't have to do it here. */
12202 parse_trace_status (p, ts);
12204 return ts->running;
12208 remote_get_tracepoint_status (struct target_ops *self, struct breakpoint *bp,
12209 struct uploaded_tp *utp)
12211 struct remote_state *rs = get_remote_state ();
12213 struct bp_location *loc;
12214 struct tracepoint *tp = (struct tracepoint *) bp;
12215 size_t size = get_remote_packet_size ();
12219 tp->base.hit_count = 0;
12220 tp->traceframe_usage = 0;
12221 for (loc = tp->base.loc; loc; loc = loc->next)
12223 /* If the tracepoint was never downloaded, don't go asking for
12225 if (tp->number_on_target == 0)
12227 xsnprintf (rs->buf, size, "qTP:%x:%s", tp->number_on_target,
12228 phex_nz (loc->address, 0));
12230 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12231 if (reply && *reply)
12234 parse_tracepoint_status (reply + 1, bp, utp);
12240 utp->hit_count = 0;
12241 utp->traceframe_usage = 0;
12242 xsnprintf (rs->buf, size, "qTP:%x:%s", utp->number,
12243 phex_nz (utp->addr, 0));
12245 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12246 if (reply && *reply)
12249 parse_tracepoint_status (reply + 1, bp, utp);
12255 remote_trace_stop (struct target_ops *self)
12258 remote_get_noisy_reply (&target_buf, &target_buf_size);
12259 if (*target_buf == '\0')
12260 error (_("Target does not support this command."));
12261 if (strcmp (target_buf, "OK") != 0)
12262 error (_("Bogus reply from target: %s"), target_buf);
12266 remote_trace_find (struct target_ops *self,
12267 enum trace_find_type type, int num,
12268 CORE_ADDR addr1, CORE_ADDR addr2,
12271 struct remote_state *rs = get_remote_state ();
12272 char *endbuf = rs->buf + get_remote_packet_size ();
12274 int target_frameno = -1, target_tracept = -1;
12276 /* Lookups other than by absolute frame number depend on the current
12277 trace selected, so make sure it is correct on the remote end
12279 if (type != tfind_number)
12280 set_remote_traceframe ();
12283 strcpy (p, "QTFrame:");
12284 p = strchr (p, '\0');
12288 xsnprintf (p, endbuf - p, "%x", num);
12291 xsnprintf (p, endbuf - p, "pc:%s", phex_nz (addr1, 0));
12294 xsnprintf (p, endbuf - p, "tdp:%x", num);
12297 xsnprintf (p, endbuf - p, "range:%s:%s", phex_nz (addr1, 0),
12298 phex_nz (addr2, 0));
12300 case tfind_outside:
12301 xsnprintf (p, endbuf - p, "outside:%s:%s", phex_nz (addr1, 0),
12302 phex_nz (addr2, 0));
12305 error (_("Unknown trace find type %d"), type);
12309 reply = remote_get_noisy_reply (&(rs->buf), &rs->buf_size);
12310 if (*reply == '\0')
12311 error (_("Target does not support this command."));
12313 while (reply && *reply)
12318 target_frameno = (int) strtol (p, &reply, 16);
12320 error (_("Unable to parse trace frame number"));
12321 /* Don't update our remote traceframe number cache on failure
12322 to select a remote traceframe. */
12323 if (target_frameno == -1)
12328 target_tracept = (int) strtol (p, &reply, 16);
12330 error (_("Unable to parse tracepoint number"));
12332 case 'O': /* "OK"? */
12333 if (reply[1] == 'K' && reply[2] == '\0')
12336 error (_("Bogus reply from target: %s"), reply);
12339 error (_("Bogus reply from target: %s"), reply);
12342 *tpp = target_tracept;
12344 rs->remote_traceframe_number = target_frameno;
12345 return target_frameno;
12349 remote_get_trace_state_variable_value (struct target_ops *self,
12350 int tsvnum, LONGEST *val)
12352 struct remote_state *rs = get_remote_state ();
12356 set_remote_traceframe ();
12358 xsnprintf (rs->buf, get_remote_packet_size (), "qTV:%x", tsvnum);
12360 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12361 if (reply && *reply)
12365 unpack_varlen_hex (reply + 1, &uval);
12366 *val = (LONGEST) uval;
12374 remote_save_trace_data (struct target_ops *self, const char *filename)
12376 struct remote_state *rs = get_remote_state ();
12380 strcpy (p, "QTSave:");
12382 if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ())
12383 error (_("Remote file name too long for trace save packet"));
12384 p += 2 * bin2hex ((gdb_byte *) filename, p, strlen (filename));
12387 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12388 if (*reply == '\0')
12389 error (_("Target does not support this command."));
12390 if (strcmp (reply, "OK") != 0)
12391 error (_("Bogus reply from target: %s"), reply);
12395 /* This is basically a memory transfer, but needs to be its own packet
12396 because we don't know how the target actually organizes its trace
12397 memory, plus we want to be able to ask for as much as possible, but
12398 not be unhappy if we don't get as much as we ask for. */
12401 remote_get_raw_trace_data (struct target_ops *self,
12402 gdb_byte *buf, ULONGEST offset, LONGEST len)
12404 struct remote_state *rs = get_remote_state ();
12410 strcpy (p, "qTBuffer:");
12412 p += hexnumstr (p, offset);
12414 p += hexnumstr (p, len);
12418 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12419 if (reply && *reply)
12421 /* 'l' by itself means we're at the end of the buffer and
12422 there is nothing more to get. */
12426 /* Convert the reply into binary. Limit the number of bytes to
12427 convert according to our passed-in buffer size, rather than
12428 what was returned in the packet; if the target is
12429 unexpectedly generous and gives us a bigger reply than we
12430 asked for, we don't want to crash. */
12431 rslt = hex2bin (target_buf, buf, len);
12435 /* Something went wrong, flag as an error. */
12440 remote_set_disconnected_tracing (struct target_ops *self, int val)
12442 struct remote_state *rs = get_remote_state ();
12444 if (packet_support (PACKET_DisconnectedTracing_feature) == PACKET_ENABLE)
12448 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisconnected:%x", val);
12450 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12451 if (*reply == '\0')
12452 error (_("Target does not support this command."));
12453 if (strcmp (reply, "OK") != 0)
12454 error (_("Bogus reply from target: %s"), reply);
12457 warning (_("Target does not support disconnected tracing."));
12461 remote_core_of_thread (struct target_ops *ops, ptid_t ptid)
12463 struct thread_info *info = find_thread_ptid (ptid);
12465 if (info && info->priv)
12466 return info->priv->core;
12471 remote_set_circular_trace_buffer (struct target_ops *self, int val)
12473 struct remote_state *rs = get_remote_state ();
12476 xsnprintf (rs->buf, get_remote_packet_size (), "QTBuffer:circular:%x", val);
12478 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12479 if (*reply == '\0')
12480 error (_("Target does not support this command."));
12481 if (strcmp (reply, "OK") != 0)
12482 error (_("Bogus reply from target: %s"), reply);
12485 static struct traceframe_info *
12486 remote_traceframe_info (struct target_ops *self)
12490 text = target_read_stralloc (¤t_target,
12491 TARGET_OBJECT_TRACEFRAME_INFO, NULL);
12494 struct traceframe_info *info;
12495 struct cleanup *back_to = make_cleanup (xfree, text);
12497 info = parse_traceframe_info (text);
12498 do_cleanups (back_to);
12505 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12506 instruction on which a fast tracepoint may be placed. Returns -1
12507 if the packet is not supported, and 0 if the minimum instruction
12508 length is unknown. */
12511 remote_get_min_fast_tracepoint_insn_len (struct target_ops *self)
12513 struct remote_state *rs = get_remote_state ();
12516 /* If we're not debugging a process yet, the IPA can't be
12518 if (!target_has_execution)
12521 /* Make sure the remote is pointing at the right process. */
12522 set_general_process ();
12524 xsnprintf (rs->buf, get_remote_packet_size (), "qTMinFTPILen");
12526 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12527 if (*reply == '\0')
12531 ULONGEST min_insn_len;
12533 unpack_varlen_hex (reply, &min_insn_len);
12535 return (int) min_insn_len;
12540 remote_set_trace_buffer_size (struct target_ops *self, LONGEST val)
12542 if (packet_support (PACKET_QTBuffer_size) != PACKET_DISABLE)
12544 struct remote_state *rs = get_remote_state ();
12545 char *buf = rs->buf;
12546 char *endbuf = rs->buf + get_remote_packet_size ();
12547 enum packet_result result;
12549 gdb_assert (val >= 0 || val == -1);
12550 buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:");
12551 /* Send -1 as literal "-1" to avoid host size dependency. */
12555 buf += hexnumstr (buf, (ULONGEST) -val);
12558 buf += hexnumstr (buf, (ULONGEST) val);
12561 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
12562 result = packet_ok (rs->buf,
12563 &remote_protocol_packets[PACKET_QTBuffer_size]);
12565 if (result != PACKET_OK)
12566 warning (_("Bogus reply from target: %s"), rs->buf);
12571 remote_set_trace_notes (struct target_ops *self,
12572 const char *user, const char *notes,
12573 const char *stop_notes)
12575 struct remote_state *rs = get_remote_state ();
12577 char *buf = rs->buf;
12578 char *endbuf = rs->buf + get_remote_packet_size ();
12581 buf += xsnprintf (buf, endbuf - buf, "QTNotes:");
12584 buf += xsnprintf (buf, endbuf - buf, "user:");
12585 nbytes = bin2hex ((gdb_byte *) user, buf, strlen (user));
12591 buf += xsnprintf (buf, endbuf - buf, "notes:");
12592 nbytes = bin2hex ((gdb_byte *) notes, buf, strlen (notes));
12598 buf += xsnprintf (buf, endbuf - buf, "tstop:");
12599 nbytes = bin2hex ((gdb_byte *) stop_notes, buf, strlen (stop_notes));
12603 /* Ensure the buffer is terminated. */
12607 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12608 if (*reply == '\0')
12611 if (strcmp (reply, "OK") != 0)
12612 error (_("Bogus reply from target: %s"), reply);
12618 remote_use_agent (struct target_ops *self, int use)
12620 if (packet_support (PACKET_QAgent) != PACKET_DISABLE)
12622 struct remote_state *rs = get_remote_state ();
12624 /* If the stub supports QAgent. */
12625 xsnprintf (rs->buf, get_remote_packet_size (), "QAgent:%d", use);
12627 getpkt (&rs->buf, &rs->buf_size, 0);
12629 if (strcmp (rs->buf, "OK") == 0)
12640 remote_can_use_agent (struct target_ops *self)
12642 return (packet_support (PACKET_QAgent) != PACKET_DISABLE);
12645 struct btrace_target_info
12647 /* The ptid of the traced thread. */
12650 /* The obtained branch trace configuration. */
12651 struct btrace_config conf;
12654 /* Reset our idea of our target's btrace configuration. */
12657 remote_btrace_reset (void)
12659 struct remote_state *rs = get_remote_state ();
12661 memset (&rs->btrace_config, 0, sizeof (rs->btrace_config));
12664 /* Check whether the target supports branch tracing. */
12667 remote_supports_btrace (struct target_ops *self, enum btrace_format format)
12669 if (packet_support (PACKET_Qbtrace_off) != PACKET_ENABLE)
12671 if (packet_support (PACKET_qXfer_btrace) != PACKET_ENABLE)
12676 case BTRACE_FORMAT_NONE:
12679 case BTRACE_FORMAT_BTS:
12680 return (packet_support (PACKET_Qbtrace_bts) == PACKET_ENABLE);
12682 case BTRACE_FORMAT_PT:
12683 /* The trace is decoded on the host. Even if our target supports it,
12684 we still need to have libipt to decode the trace. */
12685 #if defined (HAVE_LIBIPT)
12686 return (packet_support (PACKET_Qbtrace_pt) == PACKET_ENABLE);
12687 #else /* !defined (HAVE_LIBIPT) */
12689 #endif /* !defined (HAVE_LIBIPT) */
12692 internal_error (__FILE__, __LINE__, _("Unknown branch trace format"));
12695 /* Synchronize the configuration with the target. */
12698 btrace_sync_conf (const struct btrace_config *conf)
12700 struct packet_config *packet;
12701 struct remote_state *rs;
12702 char *buf, *pos, *endbuf;
12704 rs = get_remote_state ();
12706 endbuf = buf + get_remote_packet_size ();
12708 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_bts_size];
12709 if (packet_config_support (packet) == PACKET_ENABLE
12710 && conf->bts.size != rs->btrace_config.bts.size)
12713 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
12717 getpkt (&buf, &rs->buf_size, 0);
12719 if (packet_ok (buf, packet) == PACKET_ERROR)
12721 if (buf[0] == 'E' && buf[1] == '.')
12722 error (_("Failed to configure the BTS buffer size: %s"), buf + 2);
12724 error (_("Failed to configure the BTS buffer size."));
12727 rs->btrace_config.bts.size = conf->bts.size;
12730 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_pt_size];
12731 if (packet_config_support (packet) == PACKET_ENABLE
12732 && conf->pt.size != rs->btrace_config.pt.size)
12735 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
12739 getpkt (&buf, &rs->buf_size, 0);
12741 if (packet_ok (buf, packet) == PACKET_ERROR)
12743 if (buf[0] == 'E' && buf[1] == '.')
12744 error (_("Failed to configure the trace buffer size: %s"), buf + 2);
12746 error (_("Failed to configure the trace buffer size."));
12749 rs->btrace_config.pt.size = conf->pt.size;
12753 /* Read the current thread's btrace configuration from the target and
12754 store it into CONF. */
12757 btrace_read_config (struct btrace_config *conf)
12761 xml = target_read_stralloc (¤t_target,
12762 TARGET_OBJECT_BTRACE_CONF, "");
12765 struct cleanup *cleanup;
12767 cleanup = make_cleanup (xfree, xml);
12768 parse_xml_btrace_conf (conf, xml);
12769 do_cleanups (cleanup);
12773 /* Enable branch tracing. */
12775 static struct btrace_target_info *
12776 remote_enable_btrace (struct target_ops *self, ptid_t ptid,
12777 const struct btrace_config *conf)
12779 struct btrace_target_info *tinfo = NULL;
12780 struct packet_config *packet = NULL;
12781 struct remote_state *rs = get_remote_state ();
12782 char *buf = rs->buf;
12783 char *endbuf = rs->buf + get_remote_packet_size ();
12785 switch (conf->format)
12787 case BTRACE_FORMAT_BTS:
12788 packet = &remote_protocol_packets[PACKET_Qbtrace_bts];
12791 case BTRACE_FORMAT_PT:
12792 packet = &remote_protocol_packets[PACKET_Qbtrace_pt];
12796 if (packet == NULL || packet_config_support (packet) != PACKET_ENABLE)
12797 error (_("Target does not support branch tracing."));
12799 btrace_sync_conf (conf);
12801 set_general_thread (ptid);
12803 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
12805 getpkt (&rs->buf, &rs->buf_size, 0);
12807 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
12809 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
12810 error (_("Could not enable branch tracing for %s: %s"),
12811 target_pid_to_str (ptid), rs->buf + 2);
12813 error (_("Could not enable branch tracing for %s."),
12814 target_pid_to_str (ptid));
12817 tinfo = XCNEW (struct btrace_target_info);
12818 tinfo->ptid = ptid;
12820 /* If we fail to read the configuration, we lose some information, but the
12821 tracing itself is not impacted. */
12824 btrace_read_config (&tinfo->conf);
12826 CATCH (err, RETURN_MASK_ERROR)
12828 if (err.message != NULL)
12829 warning ("%s", err.message);
12836 /* Disable branch tracing. */
12839 remote_disable_btrace (struct target_ops *self,
12840 struct btrace_target_info *tinfo)
12842 struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_off];
12843 struct remote_state *rs = get_remote_state ();
12844 char *buf = rs->buf;
12845 char *endbuf = rs->buf + get_remote_packet_size ();
12847 if (packet_config_support (packet) != PACKET_ENABLE)
12848 error (_("Target does not support branch tracing."));
12850 set_general_thread (tinfo->ptid);
12852 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
12854 getpkt (&rs->buf, &rs->buf_size, 0);
12856 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
12858 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
12859 error (_("Could not disable branch tracing for %s: %s"),
12860 target_pid_to_str (tinfo->ptid), rs->buf + 2);
12862 error (_("Could not disable branch tracing for %s."),
12863 target_pid_to_str (tinfo->ptid));
12869 /* Teardown branch tracing. */
12872 remote_teardown_btrace (struct target_ops *self,
12873 struct btrace_target_info *tinfo)
12875 /* We must not talk to the target during teardown. */
12879 /* Read the branch trace. */
12881 static enum btrace_error
12882 remote_read_btrace (struct target_ops *self,
12883 struct btrace_data *btrace,
12884 struct btrace_target_info *tinfo,
12885 enum btrace_read_type type)
12887 struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace];
12888 struct cleanup *cleanup;
12892 if (packet_config_support (packet) != PACKET_ENABLE)
12893 error (_("Target does not support branch tracing."));
12895 #if !defined(HAVE_LIBEXPAT)
12896 error (_("Cannot process branch tracing result. XML parsing not supported."));
12901 case BTRACE_READ_ALL:
12904 case BTRACE_READ_NEW:
12907 case BTRACE_READ_DELTA:
12911 internal_error (__FILE__, __LINE__,
12912 _("Bad branch tracing read type: %u."),
12913 (unsigned int) type);
12916 xml = target_read_stralloc (¤t_target,
12917 TARGET_OBJECT_BTRACE, annex);
12919 return BTRACE_ERR_UNKNOWN;
12921 cleanup = make_cleanup (xfree, xml);
12922 parse_xml_btrace (btrace, xml);
12923 do_cleanups (cleanup);
12925 return BTRACE_ERR_NONE;
12928 static const struct btrace_config *
12929 remote_btrace_conf (struct target_ops *self,
12930 const struct btrace_target_info *tinfo)
12932 return &tinfo->conf;
12936 remote_augmented_libraries_svr4_read (struct target_ops *self)
12938 return (packet_support (PACKET_augmented_libraries_svr4_read_feature)
12942 /* Implementation of to_load. */
12945 remote_load (struct target_ops *self, const char *name, int from_tty)
12947 generic_load (name, from_tty);
12950 /* Accepts an integer PID; returns a string representing a file that
12951 can be opened on the remote side to get the symbols for the child
12952 process. Returns NULL if the operation is not supported. */
12955 remote_pid_to_exec_file (struct target_ops *self, int pid)
12957 static char *filename = NULL;
12958 struct inferior *inf;
12959 char *annex = NULL;
12961 if (packet_support (PACKET_qXfer_exec_file) != PACKET_ENABLE)
12964 if (filename != NULL)
12967 inf = find_inferior_pid (pid);
12969 internal_error (__FILE__, __LINE__,
12970 _("not currently attached to process %d"), pid);
12972 if (!inf->fake_pid_p)
12974 const int annex_size = 9;
12976 annex = (char *) alloca (annex_size);
12977 xsnprintf (annex, annex_size, "%x", pid);
12980 filename = target_read_stralloc (¤t_target,
12981 TARGET_OBJECT_EXEC_FILE, annex);
12986 /* Implement the to_can_do_single_step target_ops method. */
12989 remote_can_do_single_step (struct target_ops *ops)
12991 /* We can only tell whether target supports single step or not by
12992 supported s and S vCont actions if the stub supports vContSupported
12993 feature. If the stub doesn't support vContSupported feature,
12994 we have conservatively to think target doesn't supports single
12996 if (packet_support (PACKET_vContSupported) == PACKET_ENABLE)
12998 struct remote_state *rs = get_remote_state ();
13000 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
13001 remote_vcont_probe (rs);
13003 return rs->supports_vCont.s && rs->supports_vCont.S;
13010 init_remote_ops (void)
13012 remote_ops.to_shortname = "remote";
13013 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
13014 remote_ops.to_doc =
13015 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13016 Specify the serial device it is connected to\n\
13017 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13018 remote_ops.to_open = remote_open;
13019 remote_ops.to_close = remote_close;
13020 remote_ops.to_detach = remote_detach;
13021 remote_ops.to_disconnect = remote_disconnect;
13022 remote_ops.to_resume = remote_resume;
13023 remote_ops.to_wait = remote_wait;
13024 remote_ops.to_fetch_registers = remote_fetch_registers;
13025 remote_ops.to_store_registers = remote_store_registers;
13026 remote_ops.to_prepare_to_store = remote_prepare_to_store;
13027 remote_ops.to_files_info = remote_files_info;
13028 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
13029 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
13030 remote_ops.to_stopped_by_sw_breakpoint = remote_stopped_by_sw_breakpoint;
13031 remote_ops.to_supports_stopped_by_sw_breakpoint = remote_supports_stopped_by_sw_breakpoint;
13032 remote_ops.to_stopped_by_hw_breakpoint = remote_stopped_by_hw_breakpoint;
13033 remote_ops.to_supports_stopped_by_hw_breakpoint = remote_supports_stopped_by_hw_breakpoint;
13034 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
13035 remote_ops.to_stopped_data_address = remote_stopped_data_address;
13036 remote_ops.to_watchpoint_addr_within_range =
13037 remote_watchpoint_addr_within_range;
13038 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
13039 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
13040 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
13041 remote_ops.to_region_ok_for_hw_watchpoint
13042 = remote_region_ok_for_hw_watchpoint;
13043 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
13044 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
13045 remote_ops.to_kill = remote_kill;
13046 remote_ops.to_load = remote_load;
13047 remote_ops.to_mourn_inferior = remote_mourn;
13048 remote_ops.to_pass_signals = remote_pass_signals;
13049 remote_ops.to_set_syscall_catchpoint = remote_set_syscall_catchpoint;
13050 remote_ops.to_program_signals = remote_program_signals;
13051 remote_ops.to_thread_alive = remote_thread_alive;
13052 remote_ops.to_thread_name = remote_thread_name;
13053 remote_ops.to_update_thread_list = remote_update_thread_list;
13054 remote_ops.to_pid_to_str = remote_pid_to_str;
13055 remote_ops.to_extra_thread_info = remote_threads_extra_info;
13056 remote_ops.to_get_ada_task_ptid = remote_get_ada_task_ptid;
13057 remote_ops.to_stop = remote_stop;
13058 remote_ops.to_interrupt = remote_interrupt;
13059 remote_ops.to_check_pending_interrupt = remote_check_pending_interrupt;
13060 remote_ops.to_xfer_partial = remote_xfer_partial;
13061 remote_ops.to_rcmd = remote_rcmd;
13062 remote_ops.to_pid_to_exec_file = remote_pid_to_exec_file;
13063 remote_ops.to_log_command = serial_log_command;
13064 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
13065 remote_ops.to_stratum = process_stratum;
13066 remote_ops.to_has_all_memory = default_child_has_all_memory;
13067 remote_ops.to_has_memory = default_child_has_memory;
13068 remote_ops.to_has_stack = default_child_has_stack;
13069 remote_ops.to_has_registers = default_child_has_registers;
13070 remote_ops.to_has_execution = default_child_has_execution;
13071 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
13072 remote_ops.to_can_execute_reverse = remote_can_execute_reverse;
13073 remote_ops.to_magic = OPS_MAGIC;
13074 remote_ops.to_memory_map = remote_memory_map;
13075 remote_ops.to_flash_erase = remote_flash_erase;
13076 remote_ops.to_flash_done = remote_flash_done;
13077 remote_ops.to_read_description = remote_read_description;
13078 remote_ops.to_search_memory = remote_search_memory;
13079 remote_ops.to_can_async_p = remote_can_async_p;
13080 remote_ops.to_is_async_p = remote_is_async_p;
13081 remote_ops.to_async = remote_async;
13082 remote_ops.to_thread_events = remote_thread_events;
13083 remote_ops.to_can_do_single_step = remote_can_do_single_step;
13084 remote_ops.to_terminal_inferior = remote_terminal_inferior;
13085 remote_ops.to_terminal_ours = remote_terminal_ours;
13086 remote_ops.to_supports_non_stop = remote_supports_non_stop;
13087 remote_ops.to_supports_multi_process = remote_supports_multi_process;
13088 remote_ops.to_supports_disable_randomization
13089 = remote_supports_disable_randomization;
13090 remote_ops.to_filesystem_is_local = remote_filesystem_is_local;
13091 remote_ops.to_fileio_open = remote_hostio_open;
13092 remote_ops.to_fileio_pwrite = remote_hostio_pwrite;
13093 remote_ops.to_fileio_pread = remote_hostio_pread;
13094 remote_ops.to_fileio_fstat = remote_hostio_fstat;
13095 remote_ops.to_fileio_close = remote_hostio_close;
13096 remote_ops.to_fileio_unlink = remote_hostio_unlink;
13097 remote_ops.to_fileio_readlink = remote_hostio_readlink;
13098 remote_ops.to_supports_enable_disable_tracepoint = remote_supports_enable_disable_tracepoint;
13099 remote_ops.to_supports_string_tracing = remote_supports_string_tracing;
13100 remote_ops.to_supports_evaluation_of_breakpoint_conditions = remote_supports_cond_breakpoints;
13101 remote_ops.to_can_run_breakpoint_commands = remote_can_run_breakpoint_commands;
13102 remote_ops.to_trace_init = remote_trace_init;
13103 remote_ops.to_download_tracepoint = remote_download_tracepoint;
13104 remote_ops.to_can_download_tracepoint = remote_can_download_tracepoint;
13105 remote_ops.to_download_trace_state_variable
13106 = remote_download_trace_state_variable;
13107 remote_ops.to_enable_tracepoint = remote_enable_tracepoint;
13108 remote_ops.to_disable_tracepoint = remote_disable_tracepoint;
13109 remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions;
13110 remote_ops.to_trace_start = remote_trace_start;
13111 remote_ops.to_get_trace_status = remote_get_trace_status;
13112 remote_ops.to_get_tracepoint_status = remote_get_tracepoint_status;
13113 remote_ops.to_trace_stop = remote_trace_stop;
13114 remote_ops.to_trace_find = remote_trace_find;
13115 remote_ops.to_get_trace_state_variable_value
13116 = remote_get_trace_state_variable_value;
13117 remote_ops.to_save_trace_data = remote_save_trace_data;
13118 remote_ops.to_upload_tracepoints = remote_upload_tracepoints;
13119 remote_ops.to_upload_trace_state_variables
13120 = remote_upload_trace_state_variables;
13121 remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data;
13122 remote_ops.to_get_min_fast_tracepoint_insn_len = remote_get_min_fast_tracepoint_insn_len;
13123 remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing;
13124 remote_ops.to_set_circular_trace_buffer = remote_set_circular_trace_buffer;
13125 remote_ops.to_set_trace_buffer_size = remote_set_trace_buffer_size;
13126 remote_ops.to_set_trace_notes = remote_set_trace_notes;
13127 remote_ops.to_core_of_thread = remote_core_of_thread;
13128 remote_ops.to_verify_memory = remote_verify_memory;
13129 remote_ops.to_get_tib_address = remote_get_tib_address;
13130 remote_ops.to_set_permissions = remote_set_permissions;
13131 remote_ops.to_static_tracepoint_marker_at
13132 = remote_static_tracepoint_marker_at;
13133 remote_ops.to_static_tracepoint_markers_by_strid
13134 = remote_static_tracepoint_markers_by_strid;
13135 remote_ops.to_traceframe_info = remote_traceframe_info;
13136 remote_ops.to_use_agent = remote_use_agent;
13137 remote_ops.to_can_use_agent = remote_can_use_agent;
13138 remote_ops.to_supports_btrace = remote_supports_btrace;
13139 remote_ops.to_enable_btrace = remote_enable_btrace;
13140 remote_ops.to_disable_btrace = remote_disable_btrace;
13141 remote_ops.to_teardown_btrace = remote_teardown_btrace;
13142 remote_ops.to_read_btrace = remote_read_btrace;
13143 remote_ops.to_btrace_conf = remote_btrace_conf;
13144 remote_ops.to_augmented_libraries_svr4_read =
13145 remote_augmented_libraries_svr4_read;
13146 remote_ops.to_follow_fork = remote_follow_fork;
13147 remote_ops.to_follow_exec = remote_follow_exec;
13148 remote_ops.to_insert_fork_catchpoint = remote_insert_fork_catchpoint;
13149 remote_ops.to_remove_fork_catchpoint = remote_remove_fork_catchpoint;
13150 remote_ops.to_insert_vfork_catchpoint = remote_insert_vfork_catchpoint;
13151 remote_ops.to_remove_vfork_catchpoint = remote_remove_vfork_catchpoint;
13152 remote_ops.to_insert_exec_catchpoint = remote_insert_exec_catchpoint;
13153 remote_ops.to_remove_exec_catchpoint = remote_remove_exec_catchpoint;
13156 /* Set up the extended remote vector by making a copy of the standard
13157 remote vector and adding to it. */
13160 init_extended_remote_ops (void)
13162 extended_remote_ops = remote_ops;
13164 extended_remote_ops.to_shortname = "extended-remote";
13165 extended_remote_ops.to_longname =
13166 "Extended remote serial target in gdb-specific protocol";
13167 extended_remote_ops.to_doc =
13168 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13169 Specify the serial device it is connected to (e.g. /dev/ttya).";
13170 extended_remote_ops.to_open = extended_remote_open;
13171 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
13172 extended_remote_ops.to_detach = extended_remote_detach;
13173 extended_remote_ops.to_attach = extended_remote_attach;
13174 extended_remote_ops.to_post_attach = extended_remote_post_attach;
13175 extended_remote_ops.to_supports_disable_randomization
13176 = extended_remote_supports_disable_randomization;
13180 remote_can_async_p (struct target_ops *ops)
13182 struct remote_state *rs = get_remote_state ();
13184 if (!target_async_permitted)
13185 /* We only enable async when the user specifically asks for it. */
13188 /* We're async whenever the serial device is. */
13189 return serial_can_async_p (rs->remote_desc);
13193 remote_is_async_p (struct target_ops *ops)
13195 struct remote_state *rs = get_remote_state ();
13197 if (!target_async_permitted)
13198 /* We only enable async when the user specifically asks for it. */
13201 /* We're async whenever the serial device is. */
13202 return serial_is_async_p (rs->remote_desc);
13205 /* Pass the SERIAL event on and up to the client. One day this code
13206 will be able to delay notifying the client of an event until the
13207 point where an entire packet has been received. */
13209 static serial_event_ftype remote_async_serial_handler;
13212 remote_async_serial_handler (struct serial *scb, void *context)
13214 /* Don't propogate error information up to the client. Instead let
13215 the client find out about the error by querying the target. */
13216 inferior_event_handler (INF_REG_EVENT, NULL);
13220 remote_async_inferior_event_handler (gdb_client_data data)
13222 inferior_event_handler (INF_REG_EVENT, NULL);
13226 remote_async (struct target_ops *ops, int enable)
13228 struct remote_state *rs = get_remote_state ();
13232 serial_async (rs->remote_desc, remote_async_serial_handler, rs);
13234 /* If there are pending events in the stop reply queue tell the
13235 event loop to process them. */
13236 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
13237 mark_async_event_handler (remote_async_inferior_event_token);
13238 /* For simplicity, below we clear the pending events token
13239 without remembering whether it is marked, so here we always
13240 mark it. If there's actually no pending notification to
13241 process, this ends up being a no-op (other than a spurious
13242 event-loop wakeup). */
13243 if (target_is_non_stop_p ())
13244 mark_async_event_handler (rs->notif_state->get_pending_events_token);
13248 serial_async (rs->remote_desc, NULL, NULL);
13249 /* If the core is disabling async, it doesn't want to be
13250 disturbed with target events. Clear all async event sources
13252 clear_async_event_handler (remote_async_inferior_event_token);
13253 if (target_is_non_stop_p ())
13254 clear_async_event_handler (rs->notif_state->get_pending_events_token);
13258 /* Implementation of the to_thread_events method. */
13261 remote_thread_events (struct target_ops *ops, int enable)
13263 struct remote_state *rs = get_remote_state ();
13264 size_t size = get_remote_packet_size ();
13266 if (packet_support (PACKET_QThreadEvents) == PACKET_DISABLE)
13269 xsnprintf (rs->buf, size, "QThreadEvents:%x", enable ? 1 : 0);
13271 getpkt (&rs->buf, &rs->buf_size, 0);
13273 switch (packet_ok (rs->buf,
13274 &remote_protocol_packets[PACKET_QThreadEvents]))
13277 if (strcmp (rs->buf, "OK") != 0)
13278 error (_("Remote refused setting thread events: %s"), rs->buf);
13281 warning (_("Remote failure reply: %s"), rs->buf);
13283 case PACKET_UNKNOWN:
13289 set_remote_cmd (char *args, int from_tty)
13291 help_list (remote_set_cmdlist, "set remote ", all_commands, gdb_stdout);
13295 show_remote_cmd (char *args, int from_tty)
13297 /* We can't just use cmd_show_list here, because we want to skip
13298 the redundant "show remote Z-packet" and the legacy aliases. */
13299 struct cleanup *showlist_chain;
13300 struct cmd_list_element *list = remote_show_cmdlist;
13301 struct ui_out *uiout = current_uiout;
13303 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
13304 for (; list != NULL; list = list->next)
13305 if (strcmp (list->name, "Z-packet") == 0)
13307 else if (list->type == not_set_cmd)
13308 /* Alias commands are exactly like the original, except they
13309 don't have the normal type. */
13313 struct cleanup *option_chain
13314 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
13316 ui_out_field_string (uiout, "name", list->name);
13317 ui_out_text (uiout, ": ");
13318 if (list->type == show_cmd)
13319 do_show_command ((char *) NULL, from_tty, list);
13321 cmd_func (list, NULL, from_tty);
13322 /* Close the tuple. */
13323 do_cleanups (option_chain);
13326 /* Close the tuple. */
13327 do_cleanups (showlist_chain);
13331 /* Function to be called whenever a new objfile (shlib) is detected. */
13333 remote_new_objfile (struct objfile *objfile)
13335 struct remote_state *rs = get_remote_state ();
13337 if (rs->remote_desc != 0) /* Have a remote connection. */
13338 remote_check_symbols ();
13341 /* Pull all the tracepoints defined on the target and create local
13342 data structures representing them. We don't want to create real
13343 tracepoints yet, we don't want to mess up the user's existing
13347 remote_upload_tracepoints (struct target_ops *self, struct uploaded_tp **utpp)
13349 struct remote_state *rs = get_remote_state ();
13352 /* Ask for a first packet of tracepoint definition. */
13354 getpkt (&rs->buf, &rs->buf_size, 0);
13356 while (*p && *p != 'l')
13358 parse_tracepoint_definition (p, utpp);
13359 /* Ask for another packet of tracepoint definition. */
13361 getpkt (&rs->buf, &rs->buf_size, 0);
13368 remote_upload_trace_state_variables (struct target_ops *self,
13369 struct uploaded_tsv **utsvp)
13371 struct remote_state *rs = get_remote_state ();
13374 /* Ask for a first packet of variable definition. */
13376 getpkt (&rs->buf, &rs->buf_size, 0);
13378 while (*p && *p != 'l')
13380 parse_tsv_definition (p, utsvp);
13381 /* Ask for another packet of variable definition. */
13383 getpkt (&rs->buf, &rs->buf_size, 0);
13389 /* The "set/show range-stepping" show hook. */
13392 show_range_stepping (struct ui_file *file, int from_tty,
13393 struct cmd_list_element *c,
13396 fprintf_filtered (file,
13397 _("Debugger's willingness to use range stepping "
13398 "is %s.\n"), value);
13401 /* The "set/show range-stepping" set hook. */
13404 set_range_stepping (char *ignore_args, int from_tty,
13405 struct cmd_list_element *c)
13407 struct remote_state *rs = get_remote_state ();
13409 /* Whene enabling, check whether range stepping is actually
13410 supported by the target, and warn if not. */
13411 if (use_range_stepping)
13413 if (rs->remote_desc != NULL)
13415 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
13416 remote_vcont_probe (rs);
13418 if (packet_support (PACKET_vCont) == PACKET_ENABLE
13419 && rs->supports_vCont.r)
13423 warning (_("Range stepping is not supported by the current target"));
13428 _initialize_remote (void)
13430 struct cmd_list_element *cmd;
13431 const char *cmd_name;
13433 /* architecture specific data */
13434 remote_gdbarch_data_handle =
13435 gdbarch_data_register_post_init (init_remote_state);
13436 remote_g_packet_data_handle =
13437 gdbarch_data_register_pre_init (remote_g_packet_data_init);
13440 = register_program_space_data_with_cleanup (NULL,
13441 remote_pspace_data_cleanup);
13443 /* Initialize the per-target state. At the moment there is only one
13444 of these, not one per target. Only one target is active at a
13446 remote_state = new_remote_state ();
13448 init_remote_ops ();
13449 add_target (&remote_ops);
13451 init_extended_remote_ops ();
13452 add_target (&extended_remote_ops);
13454 /* Hook into new objfile notification. */
13455 observer_attach_new_objfile (remote_new_objfile);
13456 /* We're no longer interested in notification events of an inferior
13458 observer_attach_inferior_exit (discard_pending_stop_replies);
13460 /* Set up signal handlers. */
13461 async_sigint_remote_token =
13462 create_async_signal_handler (async_remote_interrupt, NULL);
13463 async_sigint_remote_twice_token =
13464 create_async_signal_handler (async_remote_interrupt_twice, NULL);
13467 init_remote_threadtests ();
13470 stop_reply_queue = QUEUE_alloc (stop_reply_p, stop_reply_xfree);
13471 /* set/show remote ... */
13473 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
13474 Remote protocol specific variables\n\
13475 Configure various remote-protocol specific variables such as\n\
13476 the packets being used"),
13477 &remote_set_cmdlist, "set remote ",
13478 0 /* allow-unknown */, &setlist);
13479 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
13480 Remote protocol specific variables\n\
13481 Configure various remote-protocol specific variables such as\n\
13482 the packets being used"),
13483 &remote_show_cmdlist, "show remote ",
13484 0 /* allow-unknown */, &showlist);
13486 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
13487 Compare section data on target to the exec file.\n\
13488 Argument is a single section name (default: all loaded sections).\n\
13489 To compare only read-only loaded sections, specify the -r option."),
13492 add_cmd ("packet", class_maintenance, packet_command, _("\
13493 Send an arbitrary packet to a remote target.\n\
13494 maintenance packet TEXT\n\
13495 If GDB is talking to an inferior via the GDB serial protocol, then\n\
13496 this command sends the string TEXT to the inferior, and displays the\n\
13497 response packet. GDB supplies the initial `$' character, and the\n\
13498 terminating `#' character and checksum."),
13501 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
13502 Set whether to send break if interrupted."), _("\
13503 Show whether to send break if interrupted."), _("\
13504 If set, a break, instead of a cntrl-c, is sent to the remote target."),
13505 set_remotebreak, show_remotebreak,
13506 &setlist, &showlist);
13507 cmd_name = "remotebreak";
13508 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
13509 deprecate_cmd (cmd, "set remote interrupt-sequence");
13510 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
13511 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
13512 deprecate_cmd (cmd, "show remote interrupt-sequence");
13514 add_setshow_enum_cmd ("interrupt-sequence", class_support,
13515 interrupt_sequence_modes, &interrupt_sequence_mode,
13517 Set interrupt sequence to remote target."), _("\
13518 Show interrupt sequence to remote target."), _("\
13519 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
13520 NULL, show_interrupt_sequence,
13521 &remote_set_cmdlist,
13522 &remote_show_cmdlist);
13524 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
13525 &interrupt_on_connect, _("\
13526 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13527 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13528 If set, interrupt sequence is sent to remote target."),
13530 &remote_set_cmdlist, &remote_show_cmdlist);
13532 /* Install commands for configuring memory read/write packets. */
13534 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
13535 Set the maximum number of bytes per memory write packet (deprecated)."),
13537 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
13538 Show the maximum number of bytes per memory write packet (deprecated)."),
13540 add_cmd ("memory-write-packet-size", no_class,
13541 set_memory_write_packet_size, _("\
13542 Set the maximum number of bytes per memory-write packet.\n\
13543 Specify the number of bytes in a packet or 0 (zero) for the\n\
13544 default packet size. The actual limit is further reduced\n\
13545 dependent on the target. Specify ``fixed'' to disable the\n\
13546 further restriction and ``limit'' to enable that restriction."),
13547 &remote_set_cmdlist);
13548 add_cmd ("memory-read-packet-size", no_class,
13549 set_memory_read_packet_size, _("\
13550 Set the maximum number of bytes per memory-read packet.\n\
13551 Specify the number of bytes in a packet or 0 (zero) for the\n\
13552 default packet size. The actual limit is further reduced\n\
13553 dependent on the target. Specify ``fixed'' to disable the\n\
13554 further restriction and ``limit'' to enable that restriction."),
13555 &remote_set_cmdlist);
13556 add_cmd ("memory-write-packet-size", no_class,
13557 show_memory_write_packet_size,
13558 _("Show the maximum number of bytes per memory-write packet."),
13559 &remote_show_cmdlist);
13560 add_cmd ("memory-read-packet-size", no_class,
13561 show_memory_read_packet_size,
13562 _("Show the maximum number of bytes per memory-read packet."),
13563 &remote_show_cmdlist);
13565 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
13566 &remote_hw_watchpoint_limit, _("\
13567 Set the maximum number of target hardware watchpoints."), _("\
13568 Show the maximum number of target hardware watchpoints."), _("\
13569 Specify a negative limit for unlimited."),
13570 NULL, NULL, /* FIXME: i18n: The maximum
13571 number of target hardware
13572 watchpoints is %s. */
13573 &remote_set_cmdlist, &remote_show_cmdlist);
13574 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class,
13575 &remote_hw_watchpoint_length_limit, _("\
13576 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
13577 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
13578 Specify a negative limit for unlimited."),
13579 NULL, NULL, /* FIXME: i18n: The maximum
13580 length (in bytes) of a target
13581 hardware watchpoint is %s. */
13582 &remote_set_cmdlist, &remote_show_cmdlist);
13583 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
13584 &remote_hw_breakpoint_limit, _("\
13585 Set the maximum number of target hardware breakpoints."), _("\
13586 Show the maximum number of target hardware breakpoints."), _("\
13587 Specify a negative limit for unlimited."),
13588 NULL, NULL, /* FIXME: i18n: The maximum
13589 number of target hardware
13590 breakpoints is %s. */
13591 &remote_set_cmdlist, &remote_show_cmdlist);
13593 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure,
13594 &remote_address_size, _("\
13595 Set the maximum size of the address (in bits) in a memory packet."), _("\
13596 Show the maximum size of the address (in bits) in a memory packet."), NULL,
13598 NULL, /* FIXME: i18n: */
13599 &setlist, &showlist);
13601 init_all_packet_configs ();
13603 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
13604 "X", "binary-download", 1);
13606 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
13607 "vCont", "verbose-resume", 0);
13609 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
13610 "QPassSignals", "pass-signals", 0);
13612 add_packet_config_cmd (&remote_protocol_packets[PACKET_QCatchSyscalls],
13613 "QCatchSyscalls", "catch-syscalls", 0);
13615 add_packet_config_cmd (&remote_protocol_packets[PACKET_QProgramSignals],
13616 "QProgramSignals", "program-signals", 0);
13618 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
13619 "qSymbol", "symbol-lookup", 0);
13621 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
13622 "P", "set-register", 1);
13624 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
13625 "p", "fetch-register", 1);
13627 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
13628 "Z0", "software-breakpoint", 0);
13630 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
13631 "Z1", "hardware-breakpoint", 0);
13633 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
13634 "Z2", "write-watchpoint", 0);
13636 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
13637 "Z3", "read-watchpoint", 0);
13639 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
13640 "Z4", "access-watchpoint", 0);
13642 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
13643 "qXfer:auxv:read", "read-aux-vector", 0);
13645 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_exec_file],
13646 "qXfer:exec-file:read", "pid-to-exec-file", 0);
13648 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
13649 "qXfer:features:read", "target-features", 0);
13651 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
13652 "qXfer:libraries:read", "library-info", 0);
13654 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4],
13655 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
13657 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
13658 "qXfer:memory-map:read", "memory-map", 0);
13660 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
13661 "qXfer:spu:read", "read-spu-object", 0);
13663 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
13664 "qXfer:spu:write", "write-spu-object", 0);
13666 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
13667 "qXfer:osdata:read", "osdata", 0);
13669 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
13670 "qXfer:threads:read", "threads", 0);
13672 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
13673 "qXfer:siginfo:read", "read-siginfo-object", 0);
13675 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
13676 "qXfer:siginfo:write", "write-siginfo-object", 0);
13678 add_packet_config_cmd
13679 (&remote_protocol_packets[PACKET_qXfer_traceframe_info],
13680 "qXfer:traceframe-info:read", "traceframe-info", 0);
13682 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_uib],
13683 "qXfer:uib:read", "unwind-info-block", 0);
13685 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
13686 "qGetTLSAddr", "get-thread-local-storage-address",
13689 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr],
13690 "qGetTIBAddr", "get-thread-information-block-address",
13693 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
13694 "bc", "reverse-continue", 0);
13696 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
13697 "bs", "reverse-step", 0);
13699 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
13700 "qSupported", "supported-packets", 0);
13702 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
13703 "qSearch:memory", "search-memory", 0);
13705 add_packet_config_cmd (&remote_protocol_packets[PACKET_qTStatus],
13706 "qTStatus", "trace-status", 0);
13708 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_setfs],
13709 "vFile:setfs", "hostio-setfs", 0);
13711 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
13712 "vFile:open", "hostio-open", 0);
13714 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
13715 "vFile:pread", "hostio-pread", 0);
13717 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
13718 "vFile:pwrite", "hostio-pwrite", 0);
13720 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
13721 "vFile:close", "hostio-close", 0);
13723 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
13724 "vFile:unlink", "hostio-unlink", 0);
13726 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink],
13727 "vFile:readlink", "hostio-readlink", 0);
13729 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_fstat],
13730 "vFile:fstat", "hostio-fstat", 0);
13732 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
13733 "vAttach", "attach", 0);
13735 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
13738 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
13739 "QStartNoAckMode", "noack", 0);
13741 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
13742 "vKill", "kill", 0);
13744 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
13745 "qAttached", "query-attached", 0);
13747 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
13748 "ConditionalTracepoints",
13749 "conditional-tracepoints", 0);
13751 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints],
13752 "ConditionalBreakpoints",
13753 "conditional-breakpoints", 0);
13755 add_packet_config_cmd (&remote_protocol_packets[PACKET_BreakpointCommands],
13756 "BreakpointCommands",
13757 "breakpoint-commands", 0);
13759 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
13760 "FastTracepoints", "fast-tracepoints", 0);
13762 add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource],
13763 "TracepointSource", "TracepointSource", 0);
13765 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow],
13766 "QAllow", "allow", 0);
13768 add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints],
13769 "StaticTracepoints", "static-tracepoints", 0);
13771 add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace],
13772 "InstallInTrace", "install-in-trace", 0);
13774 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read],
13775 "qXfer:statictrace:read", "read-sdata-object", 0);
13777 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic],
13778 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
13780 add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization],
13781 "QDisableRandomization", "disable-randomization", 0);
13783 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAgent],
13784 "QAgent", "agent", 0);
13786 add_packet_config_cmd (&remote_protocol_packets[PACKET_QTBuffer_size],
13787 "QTBuffer:size", "trace-buffer-size", 0);
13789 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_off],
13790 "Qbtrace:off", "disable-btrace", 0);
13792 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts],
13793 "Qbtrace:bts", "enable-btrace-bts", 0);
13795 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_pt],
13796 "Qbtrace:pt", "enable-btrace-pt", 0);
13798 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace],
13799 "qXfer:btrace", "read-btrace", 0);
13801 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace_conf],
13802 "qXfer:btrace-conf", "read-btrace-conf", 0);
13804 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_bts_size],
13805 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
13807 add_packet_config_cmd (&remote_protocol_packets[PACKET_multiprocess_feature],
13808 "multiprocess-feature", "multiprocess-feature", 0);
13810 add_packet_config_cmd (&remote_protocol_packets[PACKET_swbreak_feature],
13811 "swbreak-feature", "swbreak-feature", 0);
13813 add_packet_config_cmd (&remote_protocol_packets[PACKET_hwbreak_feature],
13814 "hwbreak-feature", "hwbreak-feature", 0);
13816 add_packet_config_cmd (&remote_protocol_packets[PACKET_fork_event_feature],
13817 "fork-event-feature", "fork-event-feature", 0);
13819 add_packet_config_cmd (&remote_protocol_packets[PACKET_vfork_event_feature],
13820 "vfork-event-feature", "vfork-event-feature", 0);
13822 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_pt_size],
13823 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
13825 add_packet_config_cmd (&remote_protocol_packets[PACKET_vContSupported],
13826 "vContSupported", "verbose-resume-supported", 0);
13828 add_packet_config_cmd (&remote_protocol_packets[PACKET_exec_event_feature],
13829 "exec-event-feature", "exec-event-feature", 0);
13831 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCtrlC],
13832 "vCtrlC", "ctrl-c", 0);
13834 add_packet_config_cmd (&remote_protocol_packets[PACKET_QThreadEvents],
13835 "QThreadEvents", "thread-events", 0);
13837 add_packet_config_cmd (&remote_protocol_packets[PACKET_no_resumed],
13838 "N stop reply", "no-resumed-stop-reply", 0);
13840 /* Assert that we've registered "set remote foo-packet" commands
13841 for all packet configs. */
13845 for (i = 0; i < PACKET_MAX; i++)
13847 /* Ideally all configs would have a command associated. Some
13848 still don't though. */
13853 case PACKET_QNonStop:
13854 case PACKET_EnableDisableTracepoints_feature:
13855 case PACKET_tracenz_feature:
13856 case PACKET_DisconnectedTracing_feature:
13857 case PACKET_augmented_libraries_svr4_read_feature:
13859 /* Additions to this list need to be well justified:
13860 pre-existing packets are OK; new packets are not. */
13868 /* This catches both forgetting to add a config command, and
13869 forgetting to remove a packet from the exception list. */
13870 gdb_assert (excepted == (remote_protocol_packets[i].name == NULL));
13874 /* Keep the old ``set remote Z-packet ...'' working. Each individual
13875 Z sub-packet has its own set and show commands, but users may
13876 have sets to this variable in their .gdbinit files (or in their
13878 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
13879 &remote_Z_packet_detect, _("\
13880 Set use of remote protocol `Z' packets"), _("\
13881 Show use of remote protocol `Z' packets "), _("\
13882 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
13884 set_remote_protocol_Z_packet_cmd,
13885 show_remote_protocol_Z_packet_cmd,
13886 /* FIXME: i18n: Use of remote protocol
13887 `Z' packets is %s. */
13888 &remote_set_cmdlist, &remote_show_cmdlist);
13890 add_prefix_cmd ("remote", class_files, remote_command, _("\
13891 Manipulate files on the remote system\n\
13892 Transfer files to and from the remote target system."),
13893 &remote_cmdlist, "remote ",
13894 0 /* allow-unknown */, &cmdlist);
13896 add_cmd ("put", class_files, remote_put_command,
13897 _("Copy a local file to the remote system."),
13900 add_cmd ("get", class_files, remote_get_command,
13901 _("Copy a remote file to the local system."),
13904 add_cmd ("delete", class_files, remote_delete_command,
13905 _("Delete a remote file."),
13908 add_setshow_string_noescape_cmd ("exec-file", class_files,
13909 &remote_exec_file_var, _("\
13910 Set the remote pathname for \"run\""), _("\
13911 Show the remote pathname for \"run\""), NULL,
13912 set_remote_exec_file,
13913 show_remote_exec_file,
13914 &remote_set_cmdlist,
13915 &remote_show_cmdlist);
13917 add_setshow_boolean_cmd ("range-stepping", class_run,
13918 &use_range_stepping, _("\
13919 Enable or disable range stepping."), _("\
13920 Show whether target-assisted range stepping is enabled."), _("\
13921 If on, and the target supports it, when stepping a source line, GDB\n\
13922 tells the target to step the corresponding range of addresses itself instead\n\
13923 of issuing multiple single-steps. This speeds up source level\n\
13924 stepping. If off, GDB always issues single-steps, even if range\n\
13925 stepping is supported by the target. The default is on."),
13926 set_range_stepping,
13927 show_range_stepping,
13931 /* Eventually initialize fileio. See fileio.c */
13932 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
13934 /* Take advantage of the fact that the TID field is not used, to tag
13935 special ptids with it set to != 0. */
13936 magic_null_ptid = ptid_build (42000, -1, 1);
13937 not_sent_ptid = ptid_build (42000, -2, 1);
13938 any_thread_ptid = ptid_build (42000, 0, 1);
13940 target_buf_size = 2048;
13941 target_buf = (char *) xmalloc (target_buf_size);