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)
770 struct packet_reg *regs;
771 struct cleanup *old_chain;
773 gdb_assert (regnum < gdbarch_num_regs (gdbarch));
775 regs = XCNEWVEC (struct packet_reg, gdbarch_num_regs (gdbarch));
776 old_chain = make_cleanup (xfree, regs);
778 sizeof_g_packet = map_regcache_remote_table (gdbarch, regs);
780 *pnum = regs[regnum].pnum;
781 *poffset = regs[regnum].offset;
783 do_cleanups (old_chain);
789 init_remote_state (struct gdbarch *gdbarch)
791 struct remote_state *rs = get_remote_state_raw ();
792 struct remote_arch_state *rsa;
794 rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state);
796 /* Use the architecture to build a regnum<->pnum table, which will be
797 1:1 unless a feature set specifies otherwise. */
798 rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch,
799 gdbarch_num_regs (gdbarch),
802 /* Record the maximum possible size of the g packet - it may turn out
804 rsa->sizeof_g_packet = map_regcache_remote_table (gdbarch, rsa->regs);
806 /* Default maximum number of characters in a packet body. Many
807 remote stubs have a hardwired buffer size of 400 bytes
808 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
809 as the maximum packet-size to ensure that the packet and an extra
810 NUL character can always fit in the buffer. This stops GDB
811 trashing stubs that try to squeeze an extra NUL into what is
812 already a full buffer (As of 1999-12-04 that was most stubs). */
813 rsa->remote_packet_size = 400 - 1;
815 /* This one is filled in when a ``g'' packet is received. */
816 rsa->actual_register_packet_size = 0;
818 /* Should rsa->sizeof_g_packet needs more space than the
819 default, adjust the size accordingly. Remember that each byte is
820 encoded as two characters. 32 is the overhead for the packet
821 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
822 (``$NN:G...#NN'') is a better guess, the below has been padded a
824 if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2))
825 rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32);
827 /* Make sure that the packet buffer is plenty big enough for
828 this architecture. */
829 if (rs->buf_size < rsa->remote_packet_size)
831 rs->buf_size = 2 * rsa->remote_packet_size;
832 rs->buf = (char *) xrealloc (rs->buf, rs->buf_size);
838 /* Return the current allowed size of a remote packet. This is
839 inferred from the current architecture, and should be used to
840 limit the length of outgoing packets. */
842 get_remote_packet_size (void)
844 struct remote_state *rs = get_remote_state ();
845 struct remote_arch_state *rsa = get_remote_arch_state ();
847 if (rs->explicit_packet_size)
848 return rs->explicit_packet_size;
850 return rsa->remote_packet_size;
853 static struct packet_reg *
854 packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
856 if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch ()))
860 struct packet_reg *r = &rsa->regs[regnum];
862 gdb_assert (r->regnum == regnum);
867 static struct packet_reg *
868 packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
872 for (i = 0; i < gdbarch_num_regs (target_gdbarch ()); i++)
874 struct packet_reg *r = &rsa->regs[i];
882 static struct target_ops remote_ops;
884 static struct target_ops extended_remote_ops;
886 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
887 ``forever'' still use the normal timeout mechanism. This is
888 currently used by the ASYNC code to guarentee that target reads
889 during the initial connect always time-out. Once getpkt has been
890 modified to return a timeout indication and, in turn
891 remote_wait()/wait_for_inferior() have gained a timeout parameter
893 static int wait_forever_enabled_p = 1;
895 /* Allow the user to specify what sequence to send to the remote
896 when he requests a program interruption: Although ^C is usually
897 what remote systems expect (this is the default, here), it is
898 sometimes preferable to send a break. On other systems such
899 as the Linux kernel, a break followed by g, which is Magic SysRq g
900 is required in order to interrupt the execution. */
901 const char interrupt_sequence_control_c[] = "Ctrl-C";
902 const char interrupt_sequence_break[] = "BREAK";
903 const char interrupt_sequence_break_g[] = "BREAK-g";
904 static const char *const interrupt_sequence_modes[] =
906 interrupt_sequence_control_c,
907 interrupt_sequence_break,
908 interrupt_sequence_break_g,
911 static const char *interrupt_sequence_mode = interrupt_sequence_control_c;
914 show_interrupt_sequence (struct ui_file *file, int from_tty,
915 struct cmd_list_element *c,
918 if (interrupt_sequence_mode == interrupt_sequence_control_c)
919 fprintf_filtered (file,
920 _("Send the ASCII ETX character (Ctrl-c) "
921 "to the remote target to interrupt the "
922 "execution of the program.\n"));
923 else if (interrupt_sequence_mode == interrupt_sequence_break)
924 fprintf_filtered (file,
925 _("send a break signal to the remote target "
926 "to interrupt the execution of the program.\n"));
927 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
928 fprintf_filtered (file,
929 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
930 "the remote target to interrupt the execution "
931 "of Linux kernel.\n"));
933 internal_error (__FILE__, __LINE__,
934 _("Invalid value for interrupt_sequence_mode: %s."),
935 interrupt_sequence_mode);
938 /* This boolean variable specifies whether interrupt_sequence is sent
939 to the remote target when gdb connects to it.
940 This is mostly needed when you debug the Linux kernel: The Linux kernel
941 expects BREAK g which is Magic SysRq g for connecting gdb. */
942 static int interrupt_on_connect = 0;
944 /* This variable is used to implement the "set/show remotebreak" commands.
945 Since these commands are now deprecated in favor of "set/show remote
946 interrupt-sequence", it no longer has any effect on the code. */
947 static int remote_break;
950 set_remotebreak (char *args, int from_tty, struct cmd_list_element *c)
953 interrupt_sequence_mode = interrupt_sequence_break;
955 interrupt_sequence_mode = interrupt_sequence_control_c;
959 show_remotebreak (struct ui_file *file, int from_tty,
960 struct cmd_list_element *c,
965 /* This variable sets the number of bits in an address that are to be
966 sent in a memory ("M" or "m") packet. Normally, after stripping
967 leading zeros, the entire address would be sent. This variable
968 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
969 initial implementation of remote.c restricted the address sent in
970 memory packets to ``host::sizeof long'' bytes - (typically 32
971 bits). Consequently, for 64 bit targets, the upper 32 bits of an
972 address was never sent. Since fixing this bug may cause a break in
973 some remote targets this variable is principly provided to
974 facilitate backward compatibility. */
976 static unsigned int remote_address_size;
978 /* Temporary to track who currently owns the terminal. See
979 remote_terminal_* for more details. */
981 static int remote_async_terminal_ours_p;
984 /* User configurable variables for the number of characters in a
985 memory read/write packet. MIN (rsa->remote_packet_size,
986 rsa->sizeof_g_packet) is the default. Some targets need smaller
987 values (fifo overruns, et.al.) and some users need larger values
988 (speed up transfers). The variables ``preferred_*'' (the user
989 request), ``current_*'' (what was actually set) and ``forced_*''
990 (Positive - a soft limit, negative - a hard limit). */
992 struct memory_packet_config
999 /* The default max memory-write-packet-size. The 16k is historical.
1000 (It came from older GDB's using alloca for buffers and the
1001 knowledge (folklore?) that some hosts don't cope very well with
1002 large alloca calls.) */
1003 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1005 /* The minimum remote packet size for memory transfers. Ensures we
1006 can write at least one byte. */
1007 #define MIN_MEMORY_PACKET_SIZE 20
1009 /* Compute the current size of a read/write packet. Since this makes
1010 use of ``actual_register_packet_size'' the computation is dynamic. */
1013 get_memory_packet_size (struct memory_packet_config *config)
1015 struct remote_state *rs = get_remote_state ();
1016 struct remote_arch_state *rsa = get_remote_arch_state ();
1019 if (config->fixed_p)
1021 if (config->size <= 0)
1022 what_they_get = DEFAULT_MAX_MEMORY_PACKET_SIZE;
1024 what_they_get = config->size;
1028 what_they_get = get_remote_packet_size ();
1029 /* Limit the packet to the size specified by the user. */
1030 if (config->size > 0
1031 && what_they_get > config->size)
1032 what_they_get = config->size;
1034 /* Limit it to the size of the targets ``g'' response unless we have
1035 permission from the stub to use a larger packet size. */
1036 if (rs->explicit_packet_size == 0
1037 && rsa->actual_register_packet_size > 0
1038 && what_they_get > rsa->actual_register_packet_size)
1039 what_they_get = rsa->actual_register_packet_size;
1041 if (what_they_get < MIN_MEMORY_PACKET_SIZE)
1042 what_they_get = MIN_MEMORY_PACKET_SIZE;
1044 /* Make sure there is room in the global buffer for this packet
1045 (including its trailing NUL byte). */
1046 if (rs->buf_size < what_they_get + 1)
1048 rs->buf_size = 2 * what_they_get;
1049 rs->buf = (char *) xrealloc (rs->buf, 2 * what_they_get);
1052 return what_they_get;
1055 /* Update the size of a read/write packet. If they user wants
1056 something really big then do a sanity check. */
1059 set_memory_packet_size (char *args, struct memory_packet_config *config)
1061 int fixed_p = config->fixed_p;
1062 long size = config->size;
1065 error (_("Argument required (integer, `fixed' or `limited')."));
1066 else if (strcmp (args, "hard") == 0
1067 || strcmp (args, "fixed") == 0)
1069 else if (strcmp (args, "soft") == 0
1070 || strcmp (args, "limit") == 0)
1076 size = strtoul (args, &end, 0);
1078 error (_("Invalid %s (bad syntax)."), config->name);
1080 /* Instead of explicitly capping the size of a packet to or
1081 disallowing it, the user is allowed to set the size to
1082 something arbitrarily large. */
1085 /* So that the query shows the correct value. */
1087 size = DEFAULT_MAX_MEMORY_PACKET_SIZE;
1090 if (fixed_p && !config->fixed_p)
1092 if (! query (_("The target may not be able to correctly handle a %s\n"
1093 "of %ld bytes. Change the packet size? "),
1094 config->name, size))
1095 error (_("Packet size not changed."));
1097 /* Update the config. */
1098 config->fixed_p = fixed_p;
1099 config->size = size;
1103 show_memory_packet_size (struct memory_packet_config *config)
1105 printf_filtered (_("The %s is %ld. "), config->name, config->size);
1106 if (config->fixed_p)
1107 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1108 get_memory_packet_size (config));
1110 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1111 get_memory_packet_size (config));
1114 static struct memory_packet_config memory_write_packet_config =
1116 "memory-write-packet-size",
1120 set_memory_write_packet_size (char *args, int from_tty)
1122 set_memory_packet_size (args, &memory_write_packet_config);
1126 show_memory_write_packet_size (char *args, int from_tty)
1128 show_memory_packet_size (&memory_write_packet_config);
1132 get_memory_write_packet_size (void)
1134 return get_memory_packet_size (&memory_write_packet_config);
1137 static struct memory_packet_config memory_read_packet_config =
1139 "memory-read-packet-size",
1143 set_memory_read_packet_size (char *args, int from_tty)
1145 set_memory_packet_size (args, &memory_read_packet_config);
1149 show_memory_read_packet_size (char *args, int from_tty)
1151 show_memory_packet_size (&memory_read_packet_config);
1155 get_memory_read_packet_size (void)
1157 long size = get_memory_packet_size (&memory_read_packet_config);
1159 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1160 extra buffer size argument before the memory read size can be
1161 increased beyond this. */
1162 if (size > get_remote_packet_size ())
1163 size = get_remote_packet_size ();
1168 /* Generic configuration support for packets the stub optionally
1169 supports. Allows the user to specify the use of the packet as well
1170 as allowing GDB to auto-detect support in the remote stub. */
1174 PACKET_SUPPORT_UNKNOWN = 0,
1179 struct packet_config
1184 /* If auto, GDB auto-detects support for this packet or feature,
1185 either through qSupported, or by trying the packet and looking
1186 at the response. If true, GDB assumes the target supports this
1187 packet. If false, the packet is disabled. Configs that don't
1188 have an associated command always have this set to auto. */
1189 enum auto_boolean detect;
1191 /* Does the target support this packet? */
1192 enum packet_support support;
1195 /* Analyze a packet's return value and update the packet config
1205 static enum packet_support packet_config_support (struct packet_config *config);
1206 static enum packet_support packet_support (int packet);
1209 show_packet_config_cmd (struct packet_config *config)
1211 char *support = "internal-error";
1213 switch (packet_config_support (config))
1216 support = "enabled";
1218 case PACKET_DISABLE:
1219 support = "disabled";
1221 case PACKET_SUPPORT_UNKNOWN:
1222 support = "unknown";
1225 switch (config->detect)
1227 case AUTO_BOOLEAN_AUTO:
1228 printf_filtered (_("Support for the `%s' packet "
1229 "is auto-detected, currently %s.\n"),
1230 config->name, support);
1232 case AUTO_BOOLEAN_TRUE:
1233 case AUTO_BOOLEAN_FALSE:
1234 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1235 config->name, support);
1241 add_packet_config_cmd (struct packet_config *config, const char *name,
1242 const char *title, int legacy)
1248 config->name = name;
1249 config->title = title;
1250 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1252 show_doc = xstrprintf ("Show current use of remote "
1253 "protocol `%s' (%s) packet",
1255 /* set/show TITLE-packet {auto,on,off} */
1256 cmd_name = xstrprintf ("%s-packet", title);
1257 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
1258 &config->detect, set_doc,
1259 show_doc, NULL, /* help_doc */
1261 show_remote_protocol_packet_cmd,
1262 &remote_set_cmdlist, &remote_show_cmdlist);
1263 /* The command code copies the documentation strings. */
1266 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1271 legacy_name = xstrprintf ("%s-packet", name);
1272 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1273 &remote_set_cmdlist);
1274 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1275 &remote_show_cmdlist);
1279 static enum packet_result
1280 packet_check_result (const char *buf)
1284 /* The stub recognized the packet request. Check that the
1285 operation succeeded. */
1287 && isxdigit (buf[1]) && isxdigit (buf[2])
1289 /* "Enn" - definitly an error. */
1290 return PACKET_ERROR;
1292 /* Always treat "E." as an error. This will be used for
1293 more verbose error messages, such as E.memtypes. */
1294 if (buf[0] == 'E' && buf[1] == '.')
1295 return PACKET_ERROR;
1297 /* The packet may or may not be OK. Just assume it is. */
1301 /* The stub does not support the packet. */
1302 return PACKET_UNKNOWN;
1305 static enum packet_result
1306 packet_ok (const char *buf, struct packet_config *config)
1308 enum packet_result result;
1310 if (config->detect != AUTO_BOOLEAN_TRUE
1311 && config->support == PACKET_DISABLE)
1312 internal_error (__FILE__, __LINE__,
1313 _("packet_ok: attempt to use a disabled packet"));
1315 result = packet_check_result (buf);
1320 /* The stub recognized the packet request. */
1321 if (config->support == PACKET_SUPPORT_UNKNOWN)
1324 fprintf_unfiltered (gdb_stdlog,
1325 "Packet %s (%s) is supported\n",
1326 config->name, config->title);
1327 config->support = PACKET_ENABLE;
1330 case PACKET_UNKNOWN:
1331 /* The stub does not support the packet. */
1332 if (config->detect == AUTO_BOOLEAN_AUTO
1333 && config->support == PACKET_ENABLE)
1335 /* If the stub previously indicated that the packet was
1336 supported then there is a protocol error. */
1337 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1338 config->name, config->title);
1340 else if (config->detect == AUTO_BOOLEAN_TRUE)
1342 /* The user set it wrong. */
1343 error (_("Enabled packet %s (%s) not recognized by stub"),
1344 config->name, config->title);
1348 fprintf_unfiltered (gdb_stdlog,
1349 "Packet %s (%s) is NOT supported\n",
1350 config->name, config->title);
1351 config->support = PACKET_DISABLE;
1372 PACKET_vFile_pwrite,
1374 PACKET_vFile_unlink,
1375 PACKET_vFile_readlink,
1378 PACKET_qXfer_features,
1379 PACKET_qXfer_exec_file,
1380 PACKET_qXfer_libraries,
1381 PACKET_qXfer_libraries_svr4,
1382 PACKET_qXfer_memory_map,
1383 PACKET_qXfer_spu_read,
1384 PACKET_qXfer_spu_write,
1385 PACKET_qXfer_osdata,
1386 PACKET_qXfer_threads,
1387 PACKET_qXfer_statictrace_read,
1388 PACKET_qXfer_traceframe_info,
1394 PACKET_QPassSignals,
1395 PACKET_QCatchSyscalls,
1396 PACKET_QProgramSignals,
1398 PACKET_qSearch_memory,
1401 PACKET_QStartNoAckMode,
1403 PACKET_qXfer_siginfo_read,
1404 PACKET_qXfer_siginfo_write,
1407 /* Support for conditional tracepoints. */
1408 PACKET_ConditionalTracepoints,
1410 /* Support for target-side breakpoint conditions. */
1411 PACKET_ConditionalBreakpoints,
1413 /* Support for target-side breakpoint commands. */
1414 PACKET_BreakpointCommands,
1416 /* Support for fast tracepoints. */
1417 PACKET_FastTracepoints,
1419 /* Support for static tracepoints. */
1420 PACKET_StaticTracepoints,
1422 /* Support for installing tracepoints while a trace experiment is
1424 PACKET_InstallInTrace,
1428 PACKET_TracepointSource,
1431 PACKET_QDisableRandomization,
1433 PACKET_QTBuffer_size,
1437 PACKET_qXfer_btrace,
1439 /* Support for the QNonStop packet. */
1442 /* Support for the QThreadEvents packet. */
1443 PACKET_QThreadEvents,
1445 /* Support for multi-process extensions. */
1446 PACKET_multiprocess_feature,
1448 /* Support for enabling and disabling tracepoints while a trace
1449 experiment is running. */
1450 PACKET_EnableDisableTracepoints_feature,
1452 /* Support for collecting strings using the tracenz bytecode. */
1453 PACKET_tracenz_feature,
1455 /* Support for continuing to run a trace experiment while GDB is
1457 PACKET_DisconnectedTracing_feature,
1459 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1460 PACKET_augmented_libraries_svr4_read_feature,
1462 /* Support for the qXfer:btrace-conf:read packet. */
1463 PACKET_qXfer_btrace_conf,
1465 /* Support for the Qbtrace-conf:bts:size packet. */
1466 PACKET_Qbtrace_conf_bts_size,
1468 /* Support for swbreak+ feature. */
1469 PACKET_swbreak_feature,
1471 /* Support for hwbreak+ feature. */
1472 PACKET_hwbreak_feature,
1474 /* Support for fork events. */
1475 PACKET_fork_event_feature,
1477 /* Support for vfork events. */
1478 PACKET_vfork_event_feature,
1480 /* Support for the Qbtrace-conf:pt:size packet. */
1481 PACKET_Qbtrace_conf_pt_size,
1483 /* Support for exec events. */
1484 PACKET_exec_event_feature,
1486 /* Support for query supported vCont actions. */
1487 PACKET_vContSupported,
1489 /* Support remote CTRL-C. */
1492 /* Support TARGET_WAITKIND_NO_RESUMED. */
1498 static struct packet_config remote_protocol_packets[PACKET_MAX];
1500 /* Returns the packet's corresponding "set remote foo-packet" command
1501 state. See struct packet_config for more details. */
1503 static enum auto_boolean
1504 packet_set_cmd_state (int packet)
1506 return remote_protocol_packets[packet].detect;
1509 /* Returns whether a given packet or feature is supported. This takes
1510 into account the state of the corresponding "set remote foo-packet"
1511 command, which may be used to bypass auto-detection. */
1513 static enum packet_support
1514 packet_config_support (struct packet_config *config)
1516 switch (config->detect)
1518 case AUTO_BOOLEAN_TRUE:
1519 return PACKET_ENABLE;
1520 case AUTO_BOOLEAN_FALSE:
1521 return PACKET_DISABLE;
1522 case AUTO_BOOLEAN_AUTO:
1523 return config->support;
1525 gdb_assert_not_reached (_("bad switch"));
1529 /* Same as packet_config_support, but takes the packet's enum value as
1532 static enum packet_support
1533 packet_support (int packet)
1535 struct packet_config *config = &remote_protocol_packets[packet];
1537 return packet_config_support (config);
1541 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
1542 struct cmd_list_element *c,
1545 struct packet_config *packet;
1547 for (packet = remote_protocol_packets;
1548 packet < &remote_protocol_packets[PACKET_MAX];
1551 if (&packet->detect == c->var)
1553 show_packet_config_cmd (packet);
1557 internal_error (__FILE__, __LINE__, _("Could not find config for %s"),
1561 /* Should we try one of the 'Z' requests? */
1565 Z_PACKET_SOFTWARE_BP,
1566 Z_PACKET_HARDWARE_BP,
1573 /* For compatibility with older distributions. Provide a ``set remote
1574 Z-packet ...'' command that updates all the Z packet types. */
1576 static enum auto_boolean remote_Z_packet_detect;
1579 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
1580 struct cmd_list_element *c)
1584 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1585 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
1589 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
1590 struct cmd_list_element *c,
1595 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1597 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
1601 /* Returns true if the multi-process extensions are in effect. */
1604 remote_multi_process_p (struct remote_state *rs)
1606 return packet_support (PACKET_multiprocess_feature) == PACKET_ENABLE;
1609 /* Returns true if fork events are supported. */
1612 remote_fork_event_p (struct remote_state *rs)
1614 return packet_support (PACKET_fork_event_feature) == PACKET_ENABLE;
1617 /* Returns true if vfork events are supported. */
1620 remote_vfork_event_p (struct remote_state *rs)
1622 return packet_support (PACKET_vfork_event_feature) == PACKET_ENABLE;
1625 /* Returns true if exec events are supported. */
1628 remote_exec_event_p (struct remote_state *rs)
1630 return packet_support (PACKET_exec_event_feature) == PACKET_ENABLE;
1633 /* Insert fork catchpoint target routine. If fork events are enabled
1634 then return success, nothing more to do. */
1637 remote_insert_fork_catchpoint (struct target_ops *ops, int pid)
1639 struct remote_state *rs = get_remote_state ();
1641 return !remote_fork_event_p (rs);
1644 /* Remove fork catchpoint target routine. Nothing to do, just
1648 remote_remove_fork_catchpoint (struct target_ops *ops, int pid)
1653 /* Insert vfork catchpoint target routine. If vfork events are enabled
1654 then return success, nothing more to do. */
1657 remote_insert_vfork_catchpoint (struct target_ops *ops, int pid)
1659 struct remote_state *rs = get_remote_state ();
1661 return !remote_vfork_event_p (rs);
1664 /* Remove vfork catchpoint target routine. Nothing to do, just
1668 remote_remove_vfork_catchpoint (struct target_ops *ops, int pid)
1673 /* Insert exec catchpoint target routine. If exec events are
1674 enabled, just return success. */
1677 remote_insert_exec_catchpoint (struct target_ops *ops, int pid)
1679 struct remote_state *rs = get_remote_state ();
1681 return !remote_exec_event_p (rs);
1684 /* Remove exec catchpoint target routine. Nothing to do, just
1688 remote_remove_exec_catchpoint (struct target_ops *ops, int pid)
1693 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1694 static struct async_signal_handler *async_sigint_remote_twice_token;
1695 static struct async_signal_handler *async_sigint_remote_token;
1698 /* Asynchronous signal handle registered as event loop source for
1699 when we have pending events ready to be passed to the core. */
1701 static struct async_event_handler *remote_async_inferior_event_token;
1705 static ptid_t magic_null_ptid;
1706 static ptid_t not_sent_ptid;
1707 static ptid_t any_thread_ptid;
1709 /* Find out if the stub attached to PID (and hence GDB should offer to
1710 detach instead of killing it when bailing out). */
1713 remote_query_attached (int pid)
1715 struct remote_state *rs = get_remote_state ();
1716 size_t size = get_remote_packet_size ();
1718 if (packet_support (PACKET_qAttached) == PACKET_DISABLE)
1721 if (remote_multi_process_p (rs))
1722 xsnprintf (rs->buf, size, "qAttached:%x", pid);
1724 xsnprintf (rs->buf, size, "qAttached");
1727 getpkt (&rs->buf, &rs->buf_size, 0);
1729 switch (packet_ok (rs->buf,
1730 &remote_protocol_packets[PACKET_qAttached]))
1733 if (strcmp (rs->buf, "1") == 0)
1737 warning (_("Remote failure reply: %s"), rs->buf);
1739 case PACKET_UNKNOWN:
1746 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1747 has been invented by GDB, instead of reported by the target. Since
1748 we can be connected to a remote system before before knowing about
1749 any inferior, mark the target with execution when we find the first
1750 inferior. If ATTACHED is 1, then we had just attached to this
1751 inferior. If it is 0, then we just created this inferior. If it
1752 is -1, then try querying the remote stub to find out if it had
1753 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1754 attempt to open this inferior's executable as the main executable
1755 if no main executable is open already. */
1757 static struct inferior *
1758 remote_add_inferior (int fake_pid_p, int pid, int attached,
1761 struct inferior *inf;
1763 /* Check whether this process we're learning about is to be
1764 considered attached, or if is to be considered to have been
1765 spawned by the stub. */
1767 attached = remote_query_attached (pid);
1769 if (gdbarch_has_global_solist (target_gdbarch ()))
1771 /* If the target shares code across all inferiors, then every
1772 attach adds a new inferior. */
1773 inf = add_inferior (pid);
1775 /* ... and every inferior is bound to the same program space.
1776 However, each inferior may still have its own address
1778 inf->aspace = maybe_new_address_space ();
1779 inf->pspace = current_program_space;
1783 /* In the traditional debugging scenario, there's a 1-1 match
1784 between program/address spaces. We simply bind the inferior
1785 to the program space's address space. */
1786 inf = current_inferior ();
1787 inferior_appeared (inf, pid);
1790 inf->attach_flag = attached;
1791 inf->fake_pid_p = fake_pid_p;
1793 /* If no main executable is currently open then attempt to
1794 open the file that was executed to create this inferior. */
1795 if (try_open_exec && get_exec_file (0) == NULL)
1796 exec_file_locate_attach (pid, 1);
1801 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1802 according to RUNNING. */
1805 remote_add_thread (ptid_t ptid, int running)
1807 struct remote_state *rs = get_remote_state ();
1809 /* GDB historically didn't pull threads in the initial connection
1810 setup. If the remote target doesn't even have a concept of
1811 threads (e.g., a bare-metal target), even if internally we
1812 consider that a single-threaded target, mentioning a new thread
1813 might be confusing to the user. Be silent then, preserving the
1814 age old behavior. */
1815 if (rs->starting_up)
1816 add_thread_silent (ptid);
1820 set_executing (ptid, running);
1821 set_running (ptid, running);
1824 /* Come here when we learn about a thread id from the remote target.
1825 It may be the first time we hear about such thread, so take the
1826 opportunity to add it to GDB's thread list. In case this is the
1827 first time we're noticing its corresponding inferior, add it to
1828 GDB's inferior list as well. */
1831 remote_notice_new_inferior (ptid_t currthread, int running)
1833 /* If this is a new thread, add it to GDB's thread list.
1834 If we leave it up to WFI to do this, bad things will happen. */
1836 if (in_thread_list (currthread) && is_exited (currthread))
1838 /* We're seeing an event on a thread id we knew had exited.
1839 This has to be a new thread reusing the old id. Add it. */
1840 remote_add_thread (currthread, running);
1844 if (!in_thread_list (currthread))
1846 struct inferior *inf = NULL;
1847 int pid = ptid_get_pid (currthread);
1849 if (ptid_is_pid (inferior_ptid)
1850 && pid == ptid_get_pid (inferior_ptid))
1852 /* inferior_ptid has no thread member yet. This can happen
1853 with the vAttach -> remote_wait,"TAAthread:" path if the
1854 stub doesn't support qC. This is the first stop reported
1855 after an attach, so this is the main thread. Update the
1856 ptid in the thread list. */
1857 if (in_thread_list (pid_to_ptid (pid)))
1858 thread_change_ptid (inferior_ptid, currthread);
1861 remote_add_thread (currthread, running);
1862 inferior_ptid = currthread;
1867 if (ptid_equal (magic_null_ptid, inferior_ptid))
1869 /* inferior_ptid is not set yet. This can happen with the
1870 vRun -> remote_wait,"TAAthread:" path if the stub
1871 doesn't support qC. This is the first stop reported
1872 after an attach, so this is the main thread. Update the
1873 ptid in the thread list. */
1874 thread_change_ptid (inferior_ptid, currthread);
1878 /* When connecting to a target remote, or to a target
1879 extended-remote which already was debugging an inferior, we
1880 may not know about it yet. Add it before adding its child
1881 thread, so notifications are emitted in a sensible order. */
1882 if (!in_inferior_list (ptid_get_pid (currthread)))
1884 struct remote_state *rs = get_remote_state ();
1885 int fake_pid_p = !remote_multi_process_p (rs);
1887 inf = remote_add_inferior (fake_pid_p,
1888 ptid_get_pid (currthread), -1, 1);
1891 /* This is really a new thread. Add it. */
1892 remote_add_thread (currthread, running);
1894 /* If we found a new inferior, let the common code do whatever
1895 it needs to with it (e.g., read shared libraries, insert
1896 breakpoints), unless we're just setting up an all-stop
1900 struct remote_state *rs = get_remote_state ();
1902 if (!rs->starting_up)
1903 notice_new_inferior (currthread, running, 0);
1908 /* Return the private thread data, creating it if necessary. */
1910 static struct private_thread_info *
1911 demand_private_info (ptid_t ptid)
1913 struct thread_info *info = find_thread_ptid (ptid);
1919 info->priv = XNEW (struct private_thread_info);
1920 info->private_dtor = free_private_thread_info;
1921 info->priv->core = -1;
1922 info->priv->extra = NULL;
1923 info->priv->name = NULL;
1929 /* Call this function as a result of
1930 1) A halt indication (T packet) containing a thread id
1931 2) A direct query of currthread
1932 3) Successful execution of set thread */
1935 record_currthread (struct remote_state *rs, ptid_t currthread)
1937 rs->general_thread = currthread;
1940 /* If 'QPassSignals' is supported, tell the remote stub what signals
1941 it can simply pass through to the inferior without reporting. */
1944 remote_pass_signals (struct target_ops *self,
1945 int numsigs, unsigned char *pass_signals)
1947 if (packet_support (PACKET_QPassSignals) != PACKET_DISABLE)
1949 char *pass_packet, *p;
1951 struct remote_state *rs = get_remote_state ();
1953 gdb_assert (numsigs < 256);
1954 for (i = 0; i < numsigs; i++)
1956 if (pass_signals[i])
1959 pass_packet = (char *) xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
1960 strcpy (pass_packet, "QPassSignals:");
1961 p = pass_packet + strlen (pass_packet);
1962 for (i = 0; i < numsigs; i++)
1964 if (pass_signals[i])
1967 *p++ = tohex (i >> 4);
1968 *p++ = tohex (i & 15);
1977 if (!rs->last_pass_packet || strcmp (rs->last_pass_packet, pass_packet))
1979 putpkt (pass_packet);
1980 getpkt (&rs->buf, &rs->buf_size, 0);
1981 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QPassSignals]);
1982 if (rs->last_pass_packet)
1983 xfree (rs->last_pass_packet);
1984 rs->last_pass_packet = pass_packet;
1987 xfree (pass_packet);
1991 /* If 'QCatchSyscalls' is supported, tell the remote stub
1992 to report syscalls to GDB. */
1995 remote_set_syscall_catchpoint (struct target_ops *self,
1996 int pid, int needed, int any_count,
1997 int table_size, int *table)
2000 enum packet_result result;
2003 if (packet_support (PACKET_QCatchSyscalls) == PACKET_DISABLE)
2005 /* Not supported. */
2009 if (needed && !any_count)
2013 /* Count how many syscalls are to be caught (table[sysno] != 0). */
2014 for (i = 0; i < table_size; i++)
2023 fprintf_unfiltered (gdb_stdlog,
2024 "remote_set_syscall_catchpoint "
2025 "pid %d needed %d any_count %d n_sysno %d\n",
2026 pid, needed, any_count, n_sysno);
2031 /* Prepare a packet with the sysno list, assuming max 8+1
2032 characters for a sysno. If the resulting packet size is too
2033 big, fallback on the non-selective packet. */
2034 const int maxpktsz = strlen ("QCatchSyscalls:1") + n_sysno * 9 + 1;
2036 catch_packet = xmalloc (maxpktsz);
2037 strcpy (catch_packet, "QCatchSyscalls:1");
2046 /* Add in catch_packet each syscall to be caught (table[i] != 0). */
2047 for (i = 0; i < table_size; i++)
2050 p += xsnprintf (p, catch_packet + maxpktsz - p, ";%x", i);
2053 if (strlen (catch_packet) > get_remote_packet_size ())
2055 /* catch_packet too big. Fallback to less efficient
2056 non selective mode, with GDB doing the filtering. */
2057 catch_packet[sizeof ("QCatchSyscalls:1") - 1] = 0;
2061 catch_packet = xstrdup ("QCatchSyscalls:0");
2064 struct cleanup *old_chain = make_cleanup (xfree, catch_packet);
2065 struct remote_state *rs = get_remote_state ();
2067 putpkt (catch_packet);
2068 getpkt (&rs->buf, &rs->buf_size, 0);
2069 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_QCatchSyscalls]);
2070 do_cleanups (old_chain);
2071 if (result == PACKET_OK)
2078 /* If 'QProgramSignals' is supported, tell the remote stub what
2079 signals it should pass through to the inferior when detaching. */
2082 remote_program_signals (struct target_ops *self,
2083 int numsigs, unsigned char *signals)
2085 if (packet_support (PACKET_QProgramSignals) != PACKET_DISABLE)
2089 struct remote_state *rs = get_remote_state ();
2091 gdb_assert (numsigs < 256);
2092 for (i = 0; i < numsigs; i++)
2097 packet = (char *) xmalloc (count * 3 + strlen ("QProgramSignals:") + 1);
2098 strcpy (packet, "QProgramSignals:");
2099 p = packet + strlen (packet);
2100 for (i = 0; i < numsigs; i++)
2102 if (signal_pass_state (i))
2105 *p++ = tohex (i >> 4);
2106 *p++ = tohex (i & 15);
2115 if (!rs->last_program_signals_packet
2116 || strcmp (rs->last_program_signals_packet, packet) != 0)
2119 getpkt (&rs->buf, &rs->buf_size, 0);
2120 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QProgramSignals]);
2121 xfree (rs->last_program_signals_packet);
2122 rs->last_program_signals_packet = packet;
2129 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2130 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2131 thread. If GEN is set, set the general thread, if not, then set
2132 the step/continue thread. */
2134 set_thread (struct ptid ptid, int gen)
2136 struct remote_state *rs = get_remote_state ();
2137 ptid_t state = gen ? rs->general_thread : rs->continue_thread;
2138 char *buf = rs->buf;
2139 char *endbuf = rs->buf + get_remote_packet_size ();
2141 if (ptid_equal (state, ptid))
2145 *buf++ = gen ? 'g' : 'c';
2146 if (ptid_equal (ptid, magic_null_ptid))
2147 xsnprintf (buf, endbuf - buf, "0");
2148 else if (ptid_equal (ptid, any_thread_ptid))
2149 xsnprintf (buf, endbuf - buf, "0");
2150 else if (ptid_equal (ptid, minus_one_ptid))
2151 xsnprintf (buf, endbuf - buf, "-1");
2153 write_ptid (buf, endbuf, ptid);
2155 getpkt (&rs->buf, &rs->buf_size, 0);
2157 rs->general_thread = ptid;
2159 rs->continue_thread = ptid;
2163 set_general_thread (struct ptid ptid)
2165 set_thread (ptid, 1);
2169 set_continue_thread (struct ptid ptid)
2171 set_thread (ptid, 0);
2174 /* Change the remote current process. Which thread within the process
2175 ends up selected isn't important, as long as it is the same process
2176 as what INFERIOR_PTID points to.
2178 This comes from that fact that there is no explicit notion of
2179 "selected process" in the protocol. The selected process for
2180 general operations is the process the selected general thread
2184 set_general_process (void)
2186 struct remote_state *rs = get_remote_state ();
2188 /* If the remote can't handle multiple processes, don't bother. */
2189 if (!remote_multi_process_p (rs))
2192 /* We only need to change the remote current thread if it's pointing
2193 at some other process. */
2194 if (ptid_get_pid (rs->general_thread) != ptid_get_pid (inferior_ptid))
2195 set_general_thread (inferior_ptid);
2199 /* Return nonzero if this is the main thread that we made up ourselves
2200 to model non-threaded targets as single-threaded. */
2203 remote_thread_always_alive (struct target_ops *ops, ptid_t ptid)
2205 struct remote_state *rs = get_remote_state ();
2208 if (ptid_equal (ptid, magic_null_ptid))
2209 /* The main thread is always alive. */
2212 if (ptid_get_pid (ptid) != 0 && ptid_get_lwp (ptid) == 0)
2213 /* The main thread is always alive. This can happen after a
2214 vAttach, if the remote side doesn't support
2221 /* Return nonzero if the thread PTID is still alive on the remote
2225 remote_thread_alive (struct target_ops *ops, ptid_t ptid)
2227 struct remote_state *rs = get_remote_state ();
2230 /* Check if this is a thread that we made up ourselves to model
2231 non-threaded targets as single-threaded. */
2232 if (remote_thread_always_alive (ops, ptid))
2236 endp = rs->buf + get_remote_packet_size ();
2239 write_ptid (p, endp, ptid);
2242 getpkt (&rs->buf, &rs->buf_size, 0);
2243 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
2246 /* Return a pointer to a thread name if we know it and NULL otherwise.
2247 The thread_info object owns the memory for the name. */
2250 remote_thread_name (struct target_ops *ops, struct thread_info *info)
2252 if (info->priv != NULL)
2253 return info->priv->name;
2258 /* About these extended threadlist and threadinfo packets. They are
2259 variable length packets but, the fields within them are often fixed
2260 length. They are redundent enough to send over UDP as is the
2261 remote protocol in general. There is a matching unit test module
2264 /* WARNING: This threadref data structure comes from the remote O.S.,
2265 libstub protocol encoding, and remote.c. It is not particularly
2268 /* Right now, the internal structure is int. We want it to be bigger.
2269 Plan to fix this. */
2271 typedef int gdb_threadref; /* Internal GDB thread reference. */
2273 /* gdb_ext_thread_info is an internal GDB data structure which is
2274 equivalent to the reply of the remote threadinfo packet. */
2276 struct gdb_ext_thread_info
2278 threadref threadid; /* External form of thread reference. */
2279 int active; /* Has state interesting to GDB?
2281 char display[256]; /* Brief state display, name,
2282 blocked/suspended. */
2283 char shortname[32]; /* To be used to name threads. */
2284 char more_display[256]; /* Long info, statistics, queue depth,
2288 /* The volume of remote transfers can be limited by submitting
2289 a mask containing bits specifying the desired information.
2290 Use a union of these values as the 'selection' parameter to
2291 get_thread_info. FIXME: Make these TAG names more thread specific. */
2293 #define TAG_THREADID 1
2294 #define TAG_EXISTS 2
2295 #define TAG_DISPLAY 4
2296 #define TAG_THREADNAME 8
2297 #define TAG_MOREDISPLAY 16
2299 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2301 static char *unpack_nibble (char *buf, int *val);
2303 static char *unpack_byte (char *buf, int *value);
2305 static char *pack_int (char *buf, int value);
2307 static char *unpack_int (char *buf, int *value);
2309 static char *unpack_string (char *src, char *dest, int length);
2311 static char *pack_threadid (char *pkt, threadref *id);
2313 static char *unpack_threadid (char *inbuf, threadref *id);
2315 void int_to_threadref (threadref *id, int value);
2317 static int threadref_to_int (threadref *ref);
2319 static void copy_threadref (threadref *dest, threadref *src);
2321 static int threadmatch (threadref *dest, threadref *src);
2323 static char *pack_threadinfo_request (char *pkt, int mode,
2326 static int remote_unpack_thread_info_response (char *pkt,
2327 threadref *expectedref,
2328 struct gdb_ext_thread_info
2332 static int remote_get_threadinfo (threadref *threadid,
2333 int fieldset, /*TAG mask */
2334 struct gdb_ext_thread_info *info);
2336 static char *pack_threadlist_request (char *pkt, int startflag,
2338 threadref *nextthread);
2340 static int parse_threadlist_response (char *pkt,
2342 threadref *original_echo,
2343 threadref *resultlist,
2346 static int remote_get_threadlist (int startflag,
2347 threadref *nextthread,
2351 threadref *threadlist);
2353 typedef int (*rmt_thread_action) (threadref *ref, void *context);
2355 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
2356 void *context, int looplimit);
2358 static int remote_newthread_step (threadref *ref, void *context);
2361 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2362 buffer we're allowed to write to. Returns
2363 BUF+CHARACTERS_WRITTEN. */
2366 write_ptid (char *buf, const char *endbuf, ptid_t ptid)
2369 struct remote_state *rs = get_remote_state ();
2371 if (remote_multi_process_p (rs))
2373 pid = ptid_get_pid (ptid);
2375 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
2377 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
2379 tid = ptid_get_lwp (ptid);
2381 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
2383 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
2388 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
2389 passed the last parsed char. Returns null_ptid on error. */
2392 read_ptid (char *buf, char **obuf)
2396 ULONGEST pid = 0, tid = 0;
2400 /* Multi-process ptid. */
2401 pp = unpack_varlen_hex (p + 1, &pid);
2403 error (_("invalid remote ptid: %s"), p);
2406 pp = unpack_varlen_hex (p + 1, &tid);
2409 return ptid_build (pid, tid, 0);
2412 /* No multi-process. Just a tid. */
2413 pp = unpack_varlen_hex (p, &tid);
2415 /* Return null_ptid when no thread id is found. */
2423 /* Since the stub is not sending a process id, then default to
2424 what's in inferior_ptid, unless it's null at this point. If so,
2425 then since there's no way to know the pid of the reported
2426 threads, use the magic number. */
2427 if (ptid_equal (inferior_ptid, null_ptid))
2428 pid = ptid_get_pid (magic_null_ptid);
2430 pid = ptid_get_pid (inferior_ptid);
2434 return ptid_build (pid, tid, 0);
2440 if (ch >= 'a' && ch <= 'f')
2441 return ch - 'a' + 10;
2442 if (ch >= '0' && ch <= '9')
2444 if (ch >= 'A' && ch <= 'F')
2445 return ch - 'A' + 10;
2450 stub_unpack_int (char *buff, int fieldlength)
2457 nibble = stubhex (*buff++);
2461 retval = retval << 4;
2467 unpack_nibble (char *buf, int *val)
2469 *val = fromhex (*buf++);
2474 unpack_byte (char *buf, int *value)
2476 *value = stub_unpack_int (buf, 2);
2481 pack_int (char *buf, int value)
2483 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
2484 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
2485 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
2486 buf = pack_hex_byte (buf, (value & 0xff));
2491 unpack_int (char *buf, int *value)
2493 *value = stub_unpack_int (buf, 8);
2497 #if 0 /* Currently unused, uncomment when needed. */
2498 static char *pack_string (char *pkt, char *string);
2501 pack_string (char *pkt, char *string)
2506 len = strlen (string);
2508 len = 200; /* Bigger than most GDB packets, junk??? */
2509 pkt = pack_hex_byte (pkt, len);
2513 if ((ch == '\0') || (ch == '#'))
2514 ch = '*'; /* Protect encapsulation. */
2519 #endif /* 0 (unused) */
2522 unpack_string (char *src, char *dest, int length)
2531 pack_threadid (char *pkt, threadref *id)
2534 unsigned char *altid;
2536 altid = (unsigned char *) id;
2537 limit = pkt + BUF_THREAD_ID_SIZE;
2539 pkt = pack_hex_byte (pkt, *altid++);
2545 unpack_threadid (char *inbuf, threadref *id)
2548 char *limit = inbuf + BUF_THREAD_ID_SIZE;
2551 altref = (char *) id;
2553 while (inbuf < limit)
2555 x = stubhex (*inbuf++);
2556 y = stubhex (*inbuf++);
2557 *altref++ = (x << 4) | y;
2562 /* Externally, threadrefs are 64 bits but internally, they are still
2563 ints. This is due to a mismatch of specifications. We would like
2564 to use 64bit thread references internally. This is an adapter
2568 int_to_threadref (threadref *id, int value)
2570 unsigned char *scan;
2572 scan = (unsigned char *) id;
2578 *scan++ = (value >> 24) & 0xff;
2579 *scan++ = (value >> 16) & 0xff;
2580 *scan++ = (value >> 8) & 0xff;
2581 *scan++ = (value & 0xff);
2585 threadref_to_int (threadref *ref)
2588 unsigned char *scan;
2594 value = (value << 8) | ((*scan++) & 0xff);
2599 copy_threadref (threadref *dest, threadref *src)
2602 unsigned char *csrc, *cdest;
2604 csrc = (unsigned char *) src;
2605 cdest = (unsigned char *) dest;
2612 threadmatch (threadref *dest, threadref *src)
2614 /* Things are broken right now, so just assume we got a match. */
2616 unsigned char *srcp, *destp;
2618 srcp = (char *) src;
2619 destp = (char *) dest;
2623 result &= (*srcp++ == *destp++) ? 1 : 0;
2630 threadid:1, # always request threadid
2637 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2640 pack_threadinfo_request (char *pkt, int mode, threadref *id)
2642 *pkt++ = 'q'; /* Info Query */
2643 *pkt++ = 'P'; /* process or thread info */
2644 pkt = pack_int (pkt, mode); /* mode */
2645 pkt = pack_threadid (pkt, id); /* threadid */
2646 *pkt = '\0'; /* terminate */
2650 /* These values tag the fields in a thread info response packet. */
2651 /* Tagging the fields allows us to request specific fields and to
2652 add more fields as time goes by. */
2654 #define TAG_THREADID 1 /* Echo the thread identifier. */
2655 #define TAG_EXISTS 2 /* Is this process defined enough to
2656 fetch registers and its stack? */
2657 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2658 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2659 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2663 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
2664 struct gdb_ext_thread_info *info)
2666 struct remote_state *rs = get_remote_state ();
2670 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
2673 /* info->threadid = 0; FIXME: implement zero_threadref. */
2675 info->display[0] = '\0';
2676 info->shortname[0] = '\0';
2677 info->more_display[0] = '\0';
2679 /* Assume the characters indicating the packet type have been
2681 pkt = unpack_int (pkt, &mask); /* arg mask */
2682 pkt = unpack_threadid (pkt, &ref);
2685 warning (_("Incomplete response to threadinfo request."));
2686 if (!threadmatch (&ref, expectedref))
2687 { /* This is an answer to a different request. */
2688 warning (_("ERROR RMT Thread info mismatch."));
2691 copy_threadref (&info->threadid, &ref);
2693 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2695 /* Packets are terminated with nulls. */
2696 while ((pkt < limit) && mask && *pkt)
2698 pkt = unpack_int (pkt, &tag); /* tag */
2699 pkt = unpack_byte (pkt, &length); /* length */
2700 if (!(tag & mask)) /* Tags out of synch with mask. */
2702 warning (_("ERROR RMT: threadinfo tag mismatch."));
2706 if (tag == TAG_THREADID)
2710 warning (_("ERROR RMT: length of threadid is not 16."));
2714 pkt = unpack_threadid (pkt, &ref);
2715 mask = mask & ~TAG_THREADID;
2718 if (tag == TAG_EXISTS)
2720 info->active = stub_unpack_int (pkt, length);
2722 mask = mask & ~(TAG_EXISTS);
2725 warning (_("ERROR RMT: 'exists' length too long."));
2731 if (tag == TAG_THREADNAME)
2733 pkt = unpack_string (pkt, &info->shortname[0], length);
2734 mask = mask & ~TAG_THREADNAME;
2737 if (tag == TAG_DISPLAY)
2739 pkt = unpack_string (pkt, &info->display[0], length);
2740 mask = mask & ~TAG_DISPLAY;
2743 if (tag == TAG_MOREDISPLAY)
2745 pkt = unpack_string (pkt, &info->more_display[0], length);
2746 mask = mask & ~TAG_MOREDISPLAY;
2749 warning (_("ERROR RMT: unknown thread info tag."));
2750 break; /* Not a tag we know about. */
2756 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
2757 struct gdb_ext_thread_info *info)
2759 struct remote_state *rs = get_remote_state ();
2762 pack_threadinfo_request (rs->buf, fieldset, threadid);
2764 getpkt (&rs->buf, &rs->buf_size, 0);
2766 if (rs->buf[0] == '\0')
2769 result = remote_unpack_thread_info_response (rs->buf + 2,
2774 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2777 pack_threadlist_request (char *pkt, int startflag, int threadcount,
2778 threadref *nextthread)
2780 *pkt++ = 'q'; /* info query packet */
2781 *pkt++ = 'L'; /* Process LIST or threadLIST request */
2782 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
2783 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
2784 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
2789 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2792 parse_threadlist_response (char *pkt, int result_limit,
2793 threadref *original_echo, threadref *resultlist,
2796 struct remote_state *rs = get_remote_state ();
2798 int count, resultcount, done;
2801 /* Assume the 'q' and 'M chars have been stripped. */
2802 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
2803 /* done parse past here */
2804 pkt = unpack_byte (pkt, &count); /* count field */
2805 pkt = unpack_nibble (pkt, &done);
2806 /* The first threadid is the argument threadid. */
2807 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
2808 while ((count-- > 0) && (pkt < limit))
2810 pkt = unpack_threadid (pkt, resultlist++);
2811 if (resultcount++ >= result_limit)
2819 /* Fetch the next batch of threads from the remote. Returns -1 if the
2820 qL packet is not supported, 0 on error and 1 on success. */
2823 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
2824 int *done, int *result_count, threadref *threadlist)
2826 struct remote_state *rs = get_remote_state ();
2829 /* Trancate result limit to be smaller than the packet size. */
2830 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10)
2831 >= get_remote_packet_size ())
2832 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
2834 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
2836 getpkt (&rs->buf, &rs->buf_size, 0);
2837 if (*rs->buf == '\0')
2839 /* Packet not supported. */
2844 parse_threadlist_response (rs->buf + 2, result_limit,
2845 &rs->echo_nextthread, threadlist, done);
2847 if (!threadmatch (&rs->echo_nextthread, nextthread))
2849 /* FIXME: This is a good reason to drop the packet. */
2850 /* Possably, there is a duplicate response. */
2852 retransmit immediatly - race conditions
2853 retransmit after timeout - yes
2855 wait for packet, then exit
2857 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2858 return 0; /* I choose simply exiting. */
2860 if (*result_count <= 0)
2864 warning (_("RMT ERROR : failed to get remote thread list."));
2867 return result; /* break; */
2869 if (*result_count > result_limit)
2872 warning (_("RMT ERROR: threadlist response longer than requested."));
2878 /* Fetch the list of remote threads, with the qL packet, and call
2879 STEPFUNCTION for each thread found. Stops iterating and returns 1
2880 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2881 STEPFUNCTION returns false. If the packet is not supported,
2885 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
2888 struct remote_state *rs = get_remote_state ();
2889 int done, i, result_count;
2897 if (loopcount++ > looplimit)
2900 warning (_("Remote fetch threadlist -infinite loop-."));
2903 result = remote_get_threadlist (startflag, &rs->nextthread,
2904 MAXTHREADLISTRESULTS,
2905 &done, &result_count,
2906 rs->resultthreadlist);
2909 /* Clear for later iterations. */
2911 /* Setup to resume next batch of thread references, set nextthread. */
2912 if (result_count >= 1)
2913 copy_threadref (&rs->nextthread,
2914 &rs->resultthreadlist[result_count - 1]);
2916 while (result_count--)
2918 if (!(*stepfunction) (&rs->resultthreadlist[i++], context))
2928 /* A thread found on the remote target. */
2930 typedef struct thread_item
2932 /* The thread's PTID. */
2935 /* The thread's extra info. May be NULL. */
2938 /* The thread's name. May be NULL. */
2941 /* The core the thread was running on. -1 if not known. */
2944 DEF_VEC_O(thread_item_t);
2946 /* Context passed around to the various methods listing remote
2947 threads. As new threads are found, they're added to the ITEMS
2950 struct threads_listing_context
2952 /* The threads found on the remote target. */
2953 VEC (thread_item_t) *items;
2956 /* Discard the contents of the constructed thread listing context. */
2959 clear_threads_listing_context (void *p)
2961 struct threads_listing_context *context
2962 = (struct threads_listing_context *) p;
2964 struct thread_item *item;
2966 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
2968 xfree (item->extra);
2972 VEC_free (thread_item_t, context->items);
2975 /* Remove the thread specified as the related_pid field of WS
2976 from the CONTEXT list. */
2979 threads_listing_context_remove (struct target_waitstatus *ws,
2980 struct threads_listing_context *context)
2982 struct thread_item *item;
2984 ptid_t child_ptid = ws->value.related_pid;
2986 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
2988 if (ptid_equal (item->ptid, child_ptid))
2990 VEC_ordered_remove (thread_item_t, context->items, i);
2997 remote_newthread_step (threadref *ref, void *data)
2999 struct threads_listing_context *context
3000 = (struct threads_listing_context *) data;
3001 struct thread_item item;
3002 int pid = ptid_get_pid (inferior_ptid);
3004 item.ptid = ptid_build (pid, threadref_to_int (ref), 0);
3009 VEC_safe_push (thread_item_t, context->items, &item);
3011 return 1; /* continue iterator */
3014 #define CRAZY_MAX_THREADS 1000
3017 remote_current_thread (ptid_t oldpid)
3019 struct remote_state *rs = get_remote_state ();
3022 getpkt (&rs->buf, &rs->buf_size, 0);
3023 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
3028 result = read_ptid (&rs->buf[2], &obuf);
3029 if (*obuf != '\0' && remote_debug)
3030 fprintf_unfiltered (gdb_stdlog,
3031 "warning: garbage in qC reply\n");
3039 /* List remote threads using the deprecated qL packet. */
3042 remote_get_threads_with_ql (struct target_ops *ops,
3043 struct threads_listing_context *context)
3045 if (remote_threadlist_iterator (remote_newthread_step, context,
3046 CRAZY_MAX_THREADS) >= 0)
3052 #if defined(HAVE_LIBEXPAT)
3055 start_thread (struct gdb_xml_parser *parser,
3056 const struct gdb_xml_element *element,
3057 void *user_data, VEC(gdb_xml_value_s) *attributes)
3059 struct threads_listing_context *data
3060 = (struct threads_listing_context *) user_data;
3062 struct thread_item item;
3064 struct gdb_xml_value *attr;
3066 id = (char *) xml_find_attribute (attributes, "id")->value;
3067 item.ptid = read_ptid (id, NULL);
3069 attr = xml_find_attribute (attributes, "core");
3071 item.core = *(ULONGEST *) attr->value;
3075 attr = xml_find_attribute (attributes, "name");
3076 item.name = attr != NULL ? xstrdup ((const char *) attr->value) : NULL;
3080 VEC_safe_push (thread_item_t, data->items, &item);
3084 end_thread (struct gdb_xml_parser *parser,
3085 const struct gdb_xml_element *element,
3086 void *user_data, const char *body_text)
3088 struct threads_listing_context *data
3089 = (struct threads_listing_context *) user_data;
3091 if (body_text && *body_text)
3092 VEC_last (thread_item_t, data->items)->extra = xstrdup (body_text);
3095 const struct gdb_xml_attribute thread_attributes[] = {
3096 { "id", GDB_XML_AF_NONE, NULL, NULL },
3097 { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
3098 { "name", GDB_XML_AF_OPTIONAL, NULL, NULL },
3099 { NULL, GDB_XML_AF_NONE, NULL, NULL }
3102 const struct gdb_xml_element thread_children[] = {
3103 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3106 const struct gdb_xml_element threads_children[] = {
3107 { "thread", thread_attributes, thread_children,
3108 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
3109 start_thread, end_thread },
3110 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3113 const struct gdb_xml_element threads_elements[] = {
3114 { "threads", NULL, threads_children,
3115 GDB_XML_EF_NONE, NULL, NULL },
3116 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3121 /* List remote threads using qXfer:threads:read. */
3124 remote_get_threads_with_qxfer (struct target_ops *ops,
3125 struct threads_listing_context *context)
3127 #if defined(HAVE_LIBEXPAT)
3128 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3130 char *xml = target_read_stralloc (ops, TARGET_OBJECT_THREADS, NULL);
3131 struct cleanup *back_to = make_cleanup (xfree, xml);
3133 if (xml != NULL && *xml != '\0')
3135 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3136 threads_elements, xml, context);
3139 do_cleanups (back_to);
3147 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3150 remote_get_threads_with_qthreadinfo (struct target_ops *ops,
3151 struct threads_listing_context *context)
3153 struct remote_state *rs = get_remote_state ();
3155 if (rs->use_threadinfo_query)
3159 putpkt ("qfThreadInfo");
3160 getpkt (&rs->buf, &rs->buf_size, 0);
3162 if (bufp[0] != '\0') /* q packet recognized */
3164 while (*bufp++ == 'm') /* reply contains one or more TID */
3168 struct thread_item item;
3170 item.ptid = read_ptid (bufp, &bufp);
3175 VEC_safe_push (thread_item_t, context->items, &item);
3177 while (*bufp++ == ','); /* comma-separated list */
3178 putpkt ("qsThreadInfo");
3179 getpkt (&rs->buf, &rs->buf_size, 0);
3186 /* Packet not recognized. */
3187 rs->use_threadinfo_query = 0;
3194 /* Implement the to_update_thread_list function for the remote
3198 remote_update_thread_list (struct target_ops *ops)
3200 struct remote_state *rs = get_remote_state ();
3201 struct threads_listing_context context;
3202 struct cleanup *old_chain;
3205 context.items = NULL;
3206 old_chain = make_cleanup (clear_threads_listing_context, &context);
3208 /* We have a few different mechanisms to fetch the thread list. Try
3209 them all, starting with the most preferred one first, falling
3210 back to older methods. */
3211 if (remote_get_threads_with_qxfer (ops, &context)
3212 || remote_get_threads_with_qthreadinfo (ops, &context)
3213 || remote_get_threads_with_ql (ops, &context))
3216 struct thread_item *item;
3217 struct thread_info *tp, *tmp;
3221 if (VEC_empty (thread_item_t, context.items)
3222 && remote_thread_always_alive (ops, inferior_ptid))
3224 /* Some targets don't really support threads, but still
3225 reply an (empty) thread list in response to the thread
3226 listing packets, instead of replying "packet not
3227 supported". Exit early so we don't delete the main
3229 do_cleanups (old_chain);
3233 /* CONTEXT now holds the current thread list on the remote
3234 target end. Delete GDB-side threads no longer found on the
3236 ALL_THREADS_SAFE (tp, tmp)
3239 VEC_iterate (thread_item_t, context.items, i, item);
3242 if (ptid_equal (item->ptid, tp->ptid))
3246 if (i == VEC_length (thread_item_t, context.items))
3249 delete_thread (tp->ptid);
3253 /* Remove any unreported fork child threads from CONTEXT so
3254 that we don't interfere with follow fork, which is where
3255 creation of such threads is handled. */
3256 remove_new_fork_children (&context);
3258 /* And now add threads we don't know about yet to our list. */
3260 VEC_iterate (thread_item_t, context.items, i, item);
3263 if (!ptid_equal (item->ptid, null_ptid))
3265 struct private_thread_info *info;
3266 /* In non-stop mode, we assume new found threads are
3267 running until proven otherwise with a stop reply. In
3268 all-stop, we can only get here if all threads are
3270 int running = target_is_non_stop_p () ? 1 : 0;
3272 remote_notice_new_inferior (item->ptid, running);
3274 info = demand_private_info (item->ptid);
3275 info->core = item->core;
3276 info->extra = item->extra;
3278 info->name = item->name;
3286 /* If no thread listing method is supported, then query whether
3287 each known thread is alive, one by one, with the T packet.
3288 If the target doesn't support threads at all, then this is a
3289 no-op. See remote_thread_alive. */
3293 do_cleanups (old_chain);
3297 * Collect a descriptive string about the given thread.
3298 * The target may say anything it wants to about the thread
3299 * (typically info about its blocked / runnable state, name, etc.).
3300 * This string will appear in the info threads display.
3302 * Optional: targets are not required to implement this function.
3306 remote_threads_extra_info (struct target_ops *self, struct thread_info *tp)
3308 struct remote_state *rs = get_remote_state ();
3312 struct gdb_ext_thread_info threadinfo;
3313 static char display_buf[100]; /* arbitrary... */
3314 int n = 0; /* position in display_buf */
3316 if (rs->remote_desc == 0) /* paranoia */
3317 internal_error (__FILE__, __LINE__,
3318 _("remote_threads_extra_info"));
3320 if (ptid_equal (tp->ptid, magic_null_ptid)
3321 || (ptid_get_pid (tp->ptid) != 0 && ptid_get_lwp (tp->ptid) == 0))
3322 /* This is the main thread which was added by GDB. The remote
3323 server doesn't know about it. */
3326 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3328 struct thread_info *info = find_thread_ptid (tp->ptid);
3330 if (info && info->priv)
3331 return info->priv->extra;
3336 if (rs->use_threadextra_query)
3339 char *endb = rs->buf + get_remote_packet_size ();
3341 xsnprintf (b, endb - b, "qThreadExtraInfo,");
3343 write_ptid (b, endb, tp->ptid);
3346 getpkt (&rs->buf, &rs->buf_size, 0);
3347 if (rs->buf[0] != 0)
3349 n = min (strlen (rs->buf) / 2, sizeof (display_buf));
3350 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
3351 display_buf [result] = '\0';
3356 /* If the above query fails, fall back to the old method. */
3357 rs->use_threadextra_query = 0;
3358 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
3359 | TAG_MOREDISPLAY | TAG_DISPLAY;
3360 int_to_threadref (&id, ptid_get_lwp (tp->ptid));
3361 if (remote_get_threadinfo (&id, set, &threadinfo))
3362 if (threadinfo.active)
3364 if (*threadinfo.shortname)
3365 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
3366 " Name: %s,", threadinfo.shortname);
3367 if (*threadinfo.display)
3368 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
3369 " State: %s,", threadinfo.display);
3370 if (*threadinfo.more_display)
3371 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
3372 " Priority: %s", threadinfo.more_display);
3376 /* For purely cosmetic reasons, clear up trailing commas. */
3377 if (',' == display_buf[n-1])
3378 display_buf[n-1] = ' ';
3387 remote_static_tracepoint_marker_at (struct target_ops *self, CORE_ADDR addr,
3388 struct static_tracepoint_marker *marker)
3390 struct remote_state *rs = get_remote_state ();
3393 xsnprintf (p, get_remote_packet_size (), "qTSTMat:");
3395 p += hexnumstr (p, addr);
3397 getpkt (&rs->buf, &rs->buf_size, 0);
3401 error (_("Remote failure reply: %s"), p);
3405 parse_static_tracepoint_marker_definition (p, &p, marker);
3412 static VEC(static_tracepoint_marker_p) *
3413 remote_static_tracepoint_markers_by_strid (struct target_ops *self,
3416 struct remote_state *rs = get_remote_state ();
3417 VEC(static_tracepoint_marker_p) *markers = NULL;
3418 struct static_tracepoint_marker *marker = NULL;
3419 struct cleanup *old_chain;
3422 /* Ask for a first packet of static tracepoint marker
3425 getpkt (&rs->buf, &rs->buf_size, 0);
3428 error (_("Remote failure reply: %s"), p);
3430 old_chain = make_cleanup (free_current_marker, &marker);
3435 marker = XCNEW (struct static_tracepoint_marker);
3439 parse_static_tracepoint_marker_definition (p, &p, marker);
3441 if (strid == NULL || strcmp (strid, marker->str_id) == 0)
3443 VEC_safe_push (static_tracepoint_marker_p,
3449 release_static_tracepoint_marker (marker);
3450 memset (marker, 0, sizeof (*marker));
3453 while (*p++ == ','); /* comma-separated list */
3454 /* Ask for another packet of static tracepoint definition. */
3456 getpkt (&rs->buf, &rs->buf_size, 0);
3460 do_cleanups (old_chain);
3465 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3468 remote_get_ada_task_ptid (struct target_ops *self, long lwp, long thread)
3470 return ptid_build (ptid_get_pid (inferior_ptid), lwp, 0);
3474 /* Restart the remote side; this is an extended protocol operation. */
3477 extended_remote_restart (void)
3479 struct remote_state *rs = get_remote_state ();
3481 /* Send the restart command; for reasons I don't understand the
3482 remote side really expects a number after the "R". */
3483 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
3486 remote_fileio_reset ();
3489 /* Clean up connection to a remote debugger. */
3492 remote_close (struct target_ops *self)
3494 struct remote_state *rs = get_remote_state ();
3496 if (rs->remote_desc == NULL)
3497 return; /* already closed */
3499 /* Make sure we leave stdin registered in the event loop, and we
3500 don't leave the async SIGINT signal handler installed. */
3501 remote_terminal_ours (self);
3503 serial_close (rs->remote_desc);
3504 rs->remote_desc = NULL;
3506 /* We don't have a connection to the remote stub anymore. Get rid
3507 of all the inferiors and their threads we were controlling.
3508 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3509 will be unable to find the thread corresponding to (pid, 0, 0). */
3510 inferior_ptid = null_ptid;
3511 discard_all_inferiors ();
3513 /* We are closing the remote target, so we should discard
3514 everything of this target. */
3515 discard_pending_stop_replies_in_queue (rs);
3517 if (remote_async_inferior_event_token)
3518 delete_async_event_handler (&remote_async_inferior_event_token);
3520 remote_notif_state_xfree (rs->notif_state);
3522 trace_reset_local_state ();
3525 /* Query the remote side for the text, data and bss offsets. */
3530 struct remote_state *rs = get_remote_state ();
3533 int lose, num_segments = 0, do_sections, do_segments;
3534 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
3535 struct section_offsets *offs;
3536 struct symfile_segment_data *data;
3538 if (symfile_objfile == NULL)
3541 putpkt ("qOffsets");
3542 getpkt (&rs->buf, &rs->buf_size, 0);
3545 if (buf[0] == '\000')
3546 return; /* Return silently. Stub doesn't support
3550 warning (_("Remote failure reply: %s"), buf);
3554 /* Pick up each field in turn. This used to be done with scanf, but
3555 scanf will make trouble if CORE_ADDR size doesn't match
3556 conversion directives correctly. The following code will work
3557 with any size of CORE_ADDR. */
3558 text_addr = data_addr = bss_addr = 0;
3562 if (startswith (ptr, "Text="))
3565 /* Don't use strtol, could lose on big values. */
3566 while (*ptr && *ptr != ';')
3567 text_addr = (text_addr << 4) + fromhex (*ptr++);
3569 if (startswith (ptr, ";Data="))
3572 while (*ptr && *ptr != ';')
3573 data_addr = (data_addr << 4) + fromhex (*ptr++);
3578 if (!lose && startswith (ptr, ";Bss="))
3581 while (*ptr && *ptr != ';')
3582 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
3584 if (bss_addr != data_addr)
3585 warning (_("Target reported unsupported offsets: %s"), buf);
3590 else if (startswith (ptr, "TextSeg="))
3593 /* Don't use strtol, could lose on big values. */
3594 while (*ptr && *ptr != ';')
3595 text_addr = (text_addr << 4) + fromhex (*ptr++);
3598 if (startswith (ptr, ";DataSeg="))
3601 while (*ptr && *ptr != ';')
3602 data_addr = (data_addr << 4) + fromhex (*ptr++);
3610 error (_("Malformed response to offset query, %s"), buf);
3611 else if (*ptr != '\0')
3612 warning (_("Target reported unsupported offsets: %s"), buf);
3614 offs = ((struct section_offsets *)
3615 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
3616 memcpy (offs, symfile_objfile->section_offsets,
3617 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
3619 data = get_symfile_segment_data (symfile_objfile->obfd);
3620 do_segments = (data != NULL);
3621 do_sections = num_segments == 0;
3623 if (num_segments > 0)
3625 segments[0] = text_addr;
3626 segments[1] = data_addr;
3628 /* If we have two segments, we can still try to relocate everything
3629 by assuming that the .text and .data offsets apply to the whole
3630 text and data segments. Convert the offsets given in the packet
3631 to base addresses for symfile_map_offsets_to_segments. */
3632 else if (data && data->num_segments == 2)
3634 segments[0] = data->segment_bases[0] + text_addr;
3635 segments[1] = data->segment_bases[1] + data_addr;
3638 /* If the object file has only one segment, assume that it is text
3639 rather than data; main programs with no writable data are rare,
3640 but programs with no code are useless. Of course the code might
3641 have ended up in the data segment... to detect that we would need
3642 the permissions here. */
3643 else if (data && data->num_segments == 1)
3645 segments[0] = data->segment_bases[0] + text_addr;
3648 /* There's no way to relocate by segment. */
3654 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
3655 offs, num_segments, segments);
3657 if (ret == 0 && !do_sections)
3658 error (_("Can not handle qOffsets TextSeg "
3659 "response with this symbol file"));
3666 free_symfile_segment_data (data);
3670 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
3672 /* This is a temporary kludge to force data and bss to use the
3673 same offsets because that's what nlmconv does now. The real
3674 solution requires changes to the stub and remote.c that I
3675 don't have time to do right now. */
3677 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
3678 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
3681 objfile_relocate (symfile_objfile, offs);
3684 /* Send interrupt_sequence to remote target. */
3686 send_interrupt_sequence (void)
3688 struct remote_state *rs = get_remote_state ();
3690 if (interrupt_sequence_mode == interrupt_sequence_control_c)
3691 remote_serial_write ("\x03", 1);
3692 else if (interrupt_sequence_mode == interrupt_sequence_break)
3693 serial_send_break (rs->remote_desc);
3694 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
3696 serial_send_break (rs->remote_desc);
3697 remote_serial_write ("g", 1);
3700 internal_error (__FILE__, __LINE__,
3701 _("Invalid value for interrupt_sequence_mode: %s."),
3702 interrupt_sequence_mode);
3706 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3707 and extract the PTID. Returns NULL_PTID if not found. */
3710 stop_reply_extract_thread (char *stop_reply)
3712 if (stop_reply[0] == 'T' && strlen (stop_reply) > 3)
3716 /* Txx r:val ; r:val (...) */
3719 /* Look for "register" named "thread". */
3724 p1 = strchr (p, ':');
3728 if (strncmp (p, "thread", p1 - p) == 0)
3729 return read_ptid (++p1, &p);
3731 p1 = strchr (p, ';');
3743 /* Determine the remote side's current thread. If we have a stop
3744 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3745 "thread" register we can extract the current thread from. If not,
3746 ask the remote which is the current thread with qC. The former
3747 method avoids a roundtrip. */
3750 get_current_thread (char *wait_status)
3752 ptid_t ptid = null_ptid;
3754 /* Note we don't use remote_parse_stop_reply as that makes use of
3755 the target architecture, which we haven't yet fully determined at
3757 if (wait_status != NULL)
3758 ptid = stop_reply_extract_thread (wait_status);
3759 if (ptid_equal (ptid, null_ptid))
3760 ptid = remote_current_thread (inferior_ptid);
3765 /* Query the remote target for which is the current thread/process,
3766 add it to our tables, and update INFERIOR_PTID. The caller is
3767 responsible for setting the state such that the remote end is ready
3768 to return the current thread.
3770 This function is called after handling the '?' or 'vRun' packets,
3771 whose response is a stop reply from which we can also try
3772 extracting the thread. If the target doesn't support the explicit
3773 qC query, we infer the current thread from that stop reply, passed
3774 in in WAIT_STATUS, which may be NULL. */
3777 add_current_inferior_and_thread (char *wait_status)
3779 struct remote_state *rs = get_remote_state ();
3783 inferior_ptid = null_ptid;
3785 /* Now, if we have thread information, update inferior_ptid. */
3786 ptid = get_current_thread (wait_status);
3788 if (!ptid_equal (ptid, null_ptid))
3790 if (!remote_multi_process_p (rs))
3793 inferior_ptid = ptid;
3797 /* Without this, some commands which require an active target
3798 (such as kill) won't work. This variable serves (at least)
3799 double duty as both the pid of the target process (if it has
3800 such), and as a flag indicating that a target is active. */
3801 inferior_ptid = magic_null_ptid;
3805 remote_add_inferior (fake_pid_p, ptid_get_pid (inferior_ptid), -1, 1);
3807 /* Add the main thread. */
3808 add_thread_silent (inferior_ptid);
3811 /* Print info about a thread that was found already stopped on
3815 print_one_stopped_thread (struct thread_info *thread)
3817 struct target_waitstatus *ws = &thread->suspend.waitstatus;
3819 switch_to_thread (thread->ptid);
3820 stop_pc = get_frame_pc (get_current_frame ());
3821 set_current_sal_from_frame (get_current_frame ());
3823 thread->suspend.waitstatus_pending_p = 0;
3825 if (ws->kind == TARGET_WAITKIND_STOPPED)
3827 enum gdb_signal sig = ws->value.sig;
3829 if (signal_print_state (sig))
3830 observer_notify_signal_received (sig);
3832 observer_notify_normal_stop (NULL, 1);
3835 /* Process all initial stop replies the remote side sent in response
3836 to the ? packet. These indicate threads that were already stopped
3837 on initial connection. We mark these threads as stopped and print
3838 their current frame before giving the user the prompt. */
3841 process_initial_stop_replies (int from_tty)
3843 int pending_stop_replies = stop_reply_queue_length ();
3844 struct inferior *inf;
3845 struct thread_info *thread;
3846 struct thread_info *selected = NULL;
3847 struct thread_info *lowest_stopped = NULL;
3848 struct thread_info *first = NULL;
3850 /* Consume the initial pending events. */
3851 while (pending_stop_replies-- > 0)
3853 ptid_t waiton_ptid = minus_one_ptid;
3855 struct target_waitstatus ws;
3856 int ignore_event = 0;
3857 struct thread_info *thread;
3859 memset (&ws, 0, sizeof (ws));
3860 event_ptid = target_wait (waiton_ptid, &ws, TARGET_WNOHANG);
3862 print_target_wait_results (waiton_ptid, event_ptid, &ws);
3866 case TARGET_WAITKIND_IGNORE:
3867 case TARGET_WAITKIND_NO_RESUMED:
3868 case TARGET_WAITKIND_SIGNALLED:
3869 case TARGET_WAITKIND_EXITED:
3870 /* We shouldn't see these, but if we do, just ignore. */
3872 fprintf_unfiltered (gdb_stdlog, "remote: event ignored\n");
3876 case TARGET_WAITKIND_EXECD:
3877 xfree (ws.value.execd_pathname);
3886 thread = find_thread_ptid (event_ptid);
3888 if (ws.kind == TARGET_WAITKIND_STOPPED)
3890 enum gdb_signal sig = ws.value.sig;
3892 /* Stubs traditionally report SIGTRAP as initial signal,
3893 instead of signal 0. Suppress it. */
3894 if (sig == GDB_SIGNAL_TRAP)
3896 thread->suspend.stop_signal = sig;
3900 thread->suspend.waitstatus = ws;
3902 if (ws.kind != TARGET_WAITKIND_STOPPED
3903 || ws.value.sig != GDB_SIGNAL_0)
3904 thread->suspend.waitstatus_pending_p = 1;
3906 set_executing (event_ptid, 0);
3907 set_running (event_ptid, 0);
3910 /* "Notice" the new inferiors before anything related to
3911 registers/memory. */
3917 inf->needs_setup = 1;
3921 thread = any_live_thread_of_process (inf->pid);
3922 notice_new_inferior (thread->ptid,
3923 thread->state == THREAD_RUNNING,
3928 /* If all-stop on top of non-stop, pause all threads. Note this
3929 records the threads' stop pc, so must be done after "noticing"
3933 stop_all_threads ();
3935 /* If all threads of an inferior were already stopped, we
3936 haven't setup the inferior yet. */
3942 if (inf->needs_setup)
3944 thread = any_live_thread_of_process (inf->pid);
3945 switch_to_thread_no_regs (thread);
3951 /* Now go over all threads that are stopped, and print their current
3952 frame. If all-stop, then if there's a signalled thread, pick
3954 ALL_NON_EXITED_THREADS (thread)
3956 struct target_waitstatus *ws;
3962 set_running (thread->ptid, 0);
3963 else if (thread->state != THREAD_STOPPED)
3966 ws = &thread->suspend.waitstatus;
3968 if (selected == NULL
3969 && thread->suspend.waitstatus_pending_p)
3972 if (lowest_stopped == NULL || thread->num < lowest_stopped->num)
3973 lowest_stopped = thread;
3976 print_one_stopped_thread (thread);
3979 /* In all-stop, we only print the status of one thread, and leave
3980 others with their status pending. */
3985 thread = lowest_stopped;
3989 print_one_stopped_thread (thread);
3992 /* For "info program". */
3993 thread = inferior_thread ();
3994 if (thread->state == THREAD_STOPPED)
3995 set_last_target_status (inferior_ptid, thread->suspend.waitstatus);
3999 remote_start_remote (int from_tty, struct target_ops *target, int extended_p)
4001 struct remote_state *rs = get_remote_state ();
4002 struct packet_config *noack_config;
4003 char *wait_status = NULL;
4005 immediate_quit++; /* Allow user to interrupt it. */
4008 if (interrupt_on_connect)
4009 send_interrupt_sequence ();
4011 /* Ack any packet which the remote side has already sent. */
4012 serial_write (rs->remote_desc, "+", 1);
4014 /* Signal other parts that we're going through the initial setup,
4015 and so things may not be stable yet. */
4016 rs->starting_up = 1;
4018 /* The first packet we send to the target is the optional "supported
4019 packets" request. If the target can answer this, it will tell us
4020 which later probes to skip. */
4021 remote_query_supported ();
4023 /* If the stub wants to get a QAllow, compose one and send it. */
4024 if (packet_support (PACKET_QAllow) != PACKET_DISABLE)
4025 remote_set_permissions (target);
4027 /* Next, we possibly activate noack mode.
4029 If the QStartNoAckMode packet configuration is set to AUTO,
4030 enable noack mode if the stub reported a wish for it with
4033 If set to TRUE, then enable noack mode even if the stub didn't
4034 report it in qSupported. If the stub doesn't reply OK, the
4035 session ends with an error.
4037 If FALSE, then don't activate noack mode, regardless of what the
4038 stub claimed should be the default with qSupported. */
4040 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
4041 if (packet_config_support (noack_config) != PACKET_DISABLE)
4043 putpkt ("QStartNoAckMode");
4044 getpkt (&rs->buf, &rs->buf_size, 0);
4045 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
4051 /* Tell the remote that we are using the extended protocol. */
4053 getpkt (&rs->buf, &rs->buf_size, 0);
4056 /* Let the target know which signals it is allowed to pass down to
4058 update_signals_program_target ();
4060 /* Next, if the target can specify a description, read it. We do
4061 this before anything involving memory or registers. */
4062 target_find_description ();
4064 /* Next, now that we know something about the target, update the
4065 address spaces in the program spaces. */
4066 update_address_spaces ();
4068 /* On OSs where the list of libraries is global to all
4069 processes, we fetch them early. */
4070 if (gdbarch_has_global_solist (target_gdbarch ()))
4071 solib_add (NULL, from_tty, target, auto_solib_add);
4073 if (target_is_non_stop_p ())
4075 if (packet_support (PACKET_QNonStop) != PACKET_ENABLE)
4076 error (_("Non-stop mode requested, but remote "
4077 "does not support non-stop"));
4079 putpkt ("QNonStop:1");
4080 getpkt (&rs->buf, &rs->buf_size, 0);
4082 if (strcmp (rs->buf, "OK") != 0)
4083 error (_("Remote refused setting non-stop mode with: %s"), rs->buf);
4085 /* Find about threads and processes the stub is already
4086 controlling. We default to adding them in the running state.
4087 The '?' query below will then tell us about which threads are
4089 remote_update_thread_list (target);
4091 else if (packet_support (PACKET_QNonStop) == PACKET_ENABLE)
4093 /* Don't assume that the stub can operate in all-stop mode.
4094 Request it explicitly. */
4095 putpkt ("QNonStop:0");
4096 getpkt (&rs->buf, &rs->buf_size, 0);
4098 if (strcmp (rs->buf, "OK") != 0)
4099 error (_("Remote refused setting all-stop mode with: %s"), rs->buf);
4102 /* Upload TSVs regardless of whether the target is running or not. The
4103 remote stub, such as GDBserver, may have some predefined or builtin
4104 TSVs, even if the target is not running. */
4105 if (remote_get_trace_status (target, current_trace_status ()) != -1)
4107 struct uploaded_tsv *uploaded_tsvs = NULL;
4109 remote_upload_trace_state_variables (target, &uploaded_tsvs);
4110 merge_uploaded_trace_state_variables (&uploaded_tsvs);
4113 /* Check whether the target is running now. */
4115 getpkt (&rs->buf, &rs->buf_size, 0);
4117 if (!target_is_non_stop_p ())
4121 struct inferior *inf;
4123 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
4126 error (_("The target is not running (try extended-remote?)"));
4128 /* We're connected, but not running. Drop out before we
4129 call start_remote. */
4130 rs->starting_up = 0;
4135 /* Save the reply for later. */
4136 wait_status = (char *) alloca (strlen (rs->buf) + 1);
4137 strcpy (wait_status, rs->buf);
4140 /* Fetch thread list. */
4141 target_update_thread_list ();
4143 /* Let the stub know that we want it to return the thread. */
4144 set_continue_thread (minus_one_ptid);
4146 if (thread_count () == 0)
4148 /* Target has no concept of threads at all. GDB treats
4149 non-threaded target as single-threaded; add a main
4151 add_current_inferior_and_thread (wait_status);
4155 /* We have thread information; select the thread the target
4156 says should be current. If we're reconnecting to a
4157 multi-threaded program, this will ideally be the thread
4158 that last reported an event before GDB disconnected. */
4159 inferior_ptid = get_current_thread (wait_status);
4160 if (ptid_equal (inferior_ptid, null_ptid))
4162 /* Odd... The target was able to list threads, but not
4163 tell us which thread was current (no "thread"
4164 register in T stop reply?). Just pick the first
4165 thread in the thread list then. */
4168 fprintf_unfiltered (gdb_stdlog,
4169 "warning: couldn't determine remote "
4170 "current thread; picking first in list.\n");
4172 inferior_ptid = thread_list->ptid;
4176 /* init_wait_for_inferior should be called before get_offsets in order
4177 to manage `inserted' flag in bp loc in a correct state.
4178 breakpoint_init_inferior, called from init_wait_for_inferior, set
4179 `inserted' flag to 0, while before breakpoint_re_set, called from
4180 start_remote, set `inserted' flag to 1. In the initialization of
4181 inferior, breakpoint_init_inferior should be called first, and then
4182 breakpoint_re_set can be called. If this order is broken, state of
4183 `inserted' flag is wrong, and cause some problems on breakpoint
4185 init_wait_for_inferior ();
4187 get_offsets (); /* Get text, data & bss offsets. */
4189 /* If we could not find a description using qXfer, and we know
4190 how to do it some other way, try again. This is not
4191 supported for non-stop; it could be, but it is tricky if
4192 there are no stopped threads when we connect. */
4193 if (remote_read_description_p (target)
4194 && gdbarch_target_desc (target_gdbarch ()) == NULL)
4196 target_clear_description ();
4197 target_find_description ();
4200 /* Use the previously fetched status. */
4201 gdb_assert (wait_status != NULL);
4202 strcpy (rs->buf, wait_status);
4203 rs->cached_wait_status = 1;
4206 start_remote (from_tty); /* Initialize gdb process mechanisms. */
4210 /* Clear WFI global state. Do this before finding about new
4211 threads and inferiors, and setting the current inferior.
4212 Otherwise we would clear the proceed status of the current
4213 inferior when we want its stop_soon state to be preserved
4214 (see notice_new_inferior). */
4215 init_wait_for_inferior ();
4217 /* In non-stop, we will either get an "OK", meaning that there
4218 are no stopped threads at this time; or, a regular stop
4219 reply. In the latter case, there may be more than one thread
4220 stopped --- we pull them all out using the vStopped
4222 if (strcmp (rs->buf, "OK") != 0)
4224 struct notif_client *notif = ¬if_client_stop;
4226 /* remote_notif_get_pending_replies acks this one, and gets
4228 rs->notif_state->pending_event[notif_client_stop.id]
4229 = remote_notif_parse (notif, rs->buf);
4230 remote_notif_get_pending_events (notif);
4233 if (thread_count () == 0)
4236 error (_("The target is not running (try extended-remote?)"));
4238 /* We're connected, but not running. Drop out before we
4239 call start_remote. */
4240 rs->starting_up = 0;
4244 /* In non-stop mode, any cached wait status will be stored in
4245 the stop reply queue. */
4246 gdb_assert (wait_status == NULL);
4248 /* Report all signals during attach/startup. */
4249 remote_pass_signals (target, 0, NULL);
4251 /* If there are already stopped threads, mark them stopped and
4252 report their stops before giving the prompt to the user. */
4253 process_initial_stop_replies (from_tty);
4255 if (target_can_async_p ())
4259 /* If we connected to a live target, do some additional setup. */
4260 if (target_has_execution)
4262 if (symfile_objfile) /* No use without a symbol-file. */
4263 remote_check_symbols ();
4266 /* Possibly the target has been engaged in a trace run started
4267 previously; find out where things are at. */
4268 if (remote_get_trace_status (target, current_trace_status ()) != -1)
4270 struct uploaded_tp *uploaded_tps = NULL;
4272 if (current_trace_status ()->running)
4273 printf_filtered (_("Trace is already running on the target.\n"));
4275 remote_upload_tracepoints (target, &uploaded_tps);
4277 merge_uploaded_tracepoints (&uploaded_tps);
4280 /* The thread and inferior lists are now synchronized with the
4281 target, our symbols have been relocated, and we're merged the
4282 target's tracepoints with ours. We're done with basic start
4284 rs->starting_up = 0;
4286 /* Maybe breakpoints are global and need to be inserted now. */
4287 if (breakpoints_should_be_inserted_now ())
4288 insert_breakpoints ();
4291 /* Open a connection to a remote debugger.
4292 NAME is the filename used for communication. */
4295 remote_open (const char *name, int from_tty)
4297 remote_open_1 (name, from_tty, &remote_ops, 0);
4300 /* Open a connection to a remote debugger using the extended
4301 remote gdb protocol. NAME is the filename used for communication. */
4304 extended_remote_open (const char *name, int from_tty)
4306 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
4309 /* Reset all packets back to "unknown support". Called when opening a
4310 new connection to a remote target. */
4313 reset_all_packet_configs_support (void)
4317 for (i = 0; i < PACKET_MAX; i++)
4318 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
4321 /* Initialize all packet configs. */
4324 init_all_packet_configs (void)
4328 for (i = 0; i < PACKET_MAX; i++)
4330 remote_protocol_packets[i].detect = AUTO_BOOLEAN_AUTO;
4331 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
4335 /* Symbol look-up. */
4338 remote_check_symbols (void)
4340 struct remote_state *rs = get_remote_state ();
4341 char *msg, *reply, *tmp;
4342 struct bound_minimal_symbol sym;
4344 struct cleanup *old_chain;
4346 /* The remote side has no concept of inferiors that aren't running
4347 yet, it only knows about running processes. If we're connected
4348 but our current inferior is not running, we should not invite the
4349 remote target to request symbol lookups related to its
4350 (unrelated) current process. */
4351 if (!target_has_execution)
4354 if (packet_support (PACKET_qSymbol) == PACKET_DISABLE)
4357 /* Make sure the remote is pointing at the right process. Note
4358 there's no way to select "no process". */
4359 set_general_process ();
4361 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4362 because we need both at the same time. */
4363 msg = (char *) xmalloc (get_remote_packet_size ());
4364 old_chain = make_cleanup (xfree, msg);
4366 /* Invite target to request symbol lookups. */
4368 putpkt ("qSymbol::");
4369 getpkt (&rs->buf, &rs->buf_size, 0);
4370 packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]);
4373 while (startswith (reply, "qSymbol:"))
4375 struct bound_minimal_symbol sym;
4378 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
4380 sym = lookup_minimal_symbol (msg, NULL, NULL);
4381 if (sym.minsym == NULL)
4382 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
4385 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
4386 CORE_ADDR sym_addr = BMSYMBOL_VALUE_ADDRESS (sym);
4388 /* If this is a function address, return the start of code
4389 instead of any data function descriptor. */
4390 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4394 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
4395 phex_nz (sym_addr, addr_size), &reply[8]);
4399 getpkt (&rs->buf, &rs->buf_size, 0);
4403 do_cleanups (old_chain);
4406 static struct serial *
4407 remote_serial_open (const char *name)
4409 static int udp_warning = 0;
4411 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4412 of in ser-tcp.c, because it is the remote protocol assuming that the
4413 serial connection is reliable and not the serial connection promising
4415 if (!udp_warning && startswith (name, "udp:"))
4417 warning (_("The remote protocol may be unreliable over UDP.\n"
4418 "Some events may be lost, rendering further debugging "
4423 return serial_open (name);
4426 /* Inform the target of our permission settings. The permission flags
4427 work without this, but if the target knows the settings, it can do
4428 a couple things. First, it can add its own check, to catch cases
4429 that somehow manage to get by the permissions checks in target
4430 methods. Second, if the target is wired to disallow particular
4431 settings (for instance, a system in the field that is not set up to
4432 be able to stop at a breakpoint), it can object to any unavailable
4436 remote_set_permissions (struct target_ops *self)
4438 struct remote_state *rs = get_remote_state ();
4440 xsnprintf (rs->buf, get_remote_packet_size (), "QAllow:"
4441 "WriteReg:%x;WriteMem:%x;"
4442 "InsertBreak:%x;InsertTrace:%x;"
4443 "InsertFastTrace:%x;Stop:%x",
4444 may_write_registers, may_write_memory,
4445 may_insert_breakpoints, may_insert_tracepoints,
4446 may_insert_fast_tracepoints, may_stop);
4448 getpkt (&rs->buf, &rs->buf_size, 0);
4450 /* If the target didn't like the packet, warn the user. Do not try
4451 to undo the user's settings, that would just be maddening. */
4452 if (strcmp (rs->buf, "OK") != 0)
4453 warning (_("Remote refused setting permissions with: %s"), rs->buf);
4456 /* This type describes each known response to the qSupported
4458 struct protocol_feature
4460 /* The name of this protocol feature. */
4463 /* The default for this protocol feature. */
4464 enum packet_support default_support;
4466 /* The function to call when this feature is reported, or after
4467 qSupported processing if the feature is not supported.
4468 The first argument points to this structure. The second
4469 argument indicates whether the packet requested support be
4470 enabled, disabled, or probed (or the default, if this function
4471 is being called at the end of processing and this feature was
4472 not reported). The third argument may be NULL; if not NULL, it
4473 is a NUL-terminated string taken from the packet following
4474 this feature's name and an equals sign. */
4475 void (*func) (const struct protocol_feature *, enum packet_support,
4478 /* The corresponding packet for this feature. Only used if
4479 FUNC is remote_supported_packet. */
4484 remote_supported_packet (const struct protocol_feature *feature,
4485 enum packet_support support,
4486 const char *argument)
4490 warning (_("Remote qSupported response supplied an unexpected value for"
4491 " \"%s\"."), feature->name);
4495 remote_protocol_packets[feature->packet].support = support;
4499 remote_packet_size (const struct protocol_feature *feature,
4500 enum packet_support support, const char *value)
4502 struct remote_state *rs = get_remote_state ();
4507 if (support != PACKET_ENABLE)
4510 if (value == NULL || *value == '\0')
4512 warning (_("Remote target reported \"%s\" without a size."),
4518 packet_size = strtol (value, &value_end, 16);
4519 if (errno != 0 || *value_end != '\0' || packet_size < 0)
4521 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4522 feature->name, value);
4526 /* Record the new maximum packet size. */
4527 rs->explicit_packet_size = packet_size;
4530 static const struct protocol_feature remote_protocol_features[] = {
4531 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
4532 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
4533 PACKET_qXfer_auxv },
4534 { "qXfer:exec-file:read", PACKET_DISABLE, remote_supported_packet,
4535 PACKET_qXfer_exec_file },
4536 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
4537 PACKET_qXfer_features },
4538 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
4539 PACKET_qXfer_libraries },
4540 { "qXfer:libraries-svr4:read", PACKET_DISABLE, remote_supported_packet,
4541 PACKET_qXfer_libraries_svr4 },
4542 { "augmented-libraries-svr4-read", PACKET_DISABLE,
4543 remote_supported_packet, PACKET_augmented_libraries_svr4_read_feature },
4544 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
4545 PACKET_qXfer_memory_map },
4546 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
4547 PACKET_qXfer_spu_read },
4548 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
4549 PACKET_qXfer_spu_write },
4550 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
4551 PACKET_qXfer_osdata },
4552 { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet,
4553 PACKET_qXfer_threads },
4554 { "qXfer:traceframe-info:read", PACKET_DISABLE, remote_supported_packet,
4555 PACKET_qXfer_traceframe_info },
4556 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
4557 PACKET_QPassSignals },
4558 { "QCatchSyscalls", PACKET_DISABLE, remote_supported_packet,
4559 PACKET_QCatchSyscalls },
4560 { "QProgramSignals", PACKET_DISABLE, remote_supported_packet,
4561 PACKET_QProgramSignals },
4562 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
4563 PACKET_QStartNoAckMode },
4564 { "multiprocess", PACKET_DISABLE, remote_supported_packet,
4565 PACKET_multiprocess_feature },
4566 { "QNonStop", PACKET_DISABLE, remote_supported_packet, PACKET_QNonStop },
4567 { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
4568 PACKET_qXfer_siginfo_read },
4569 { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
4570 PACKET_qXfer_siginfo_write },
4571 { "ConditionalTracepoints", PACKET_DISABLE, remote_supported_packet,
4572 PACKET_ConditionalTracepoints },
4573 { "ConditionalBreakpoints", PACKET_DISABLE, remote_supported_packet,
4574 PACKET_ConditionalBreakpoints },
4575 { "BreakpointCommands", PACKET_DISABLE, remote_supported_packet,
4576 PACKET_BreakpointCommands },
4577 { "FastTracepoints", PACKET_DISABLE, remote_supported_packet,
4578 PACKET_FastTracepoints },
4579 { "StaticTracepoints", PACKET_DISABLE, remote_supported_packet,
4580 PACKET_StaticTracepoints },
4581 {"InstallInTrace", PACKET_DISABLE, remote_supported_packet,
4582 PACKET_InstallInTrace},
4583 { "DisconnectedTracing", PACKET_DISABLE, remote_supported_packet,
4584 PACKET_DisconnectedTracing_feature },
4585 { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
4587 { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
4589 { "TracepointSource", PACKET_DISABLE, remote_supported_packet,
4590 PACKET_TracepointSource },
4591 { "QAllow", PACKET_DISABLE, remote_supported_packet,
4593 { "EnableDisableTracepoints", PACKET_DISABLE, remote_supported_packet,
4594 PACKET_EnableDisableTracepoints_feature },
4595 { "qXfer:fdpic:read", PACKET_DISABLE, remote_supported_packet,
4596 PACKET_qXfer_fdpic },
4597 { "qXfer:uib:read", PACKET_DISABLE, remote_supported_packet,
4599 { "QDisableRandomization", PACKET_DISABLE, remote_supported_packet,
4600 PACKET_QDisableRandomization },
4601 { "QAgent", PACKET_DISABLE, remote_supported_packet, PACKET_QAgent},
4602 { "QTBuffer:size", PACKET_DISABLE,
4603 remote_supported_packet, PACKET_QTBuffer_size},
4604 { "tracenz", PACKET_DISABLE, remote_supported_packet, PACKET_tracenz_feature },
4605 { "Qbtrace:off", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_off },
4606 { "Qbtrace:bts", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_bts },
4607 { "Qbtrace:pt", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_pt },
4608 { "qXfer:btrace:read", PACKET_DISABLE, remote_supported_packet,
4609 PACKET_qXfer_btrace },
4610 { "qXfer:btrace-conf:read", PACKET_DISABLE, remote_supported_packet,
4611 PACKET_qXfer_btrace_conf },
4612 { "Qbtrace-conf:bts:size", PACKET_DISABLE, remote_supported_packet,
4613 PACKET_Qbtrace_conf_bts_size },
4614 { "swbreak", PACKET_DISABLE, remote_supported_packet, PACKET_swbreak_feature },
4615 { "hwbreak", PACKET_DISABLE, remote_supported_packet, PACKET_hwbreak_feature },
4616 { "fork-events", PACKET_DISABLE, remote_supported_packet,
4617 PACKET_fork_event_feature },
4618 { "vfork-events", PACKET_DISABLE, remote_supported_packet,
4619 PACKET_vfork_event_feature },
4620 { "exec-events", PACKET_DISABLE, remote_supported_packet,
4621 PACKET_exec_event_feature },
4622 { "Qbtrace-conf:pt:size", PACKET_DISABLE, remote_supported_packet,
4623 PACKET_Qbtrace_conf_pt_size },
4624 { "vContSupported", PACKET_DISABLE, remote_supported_packet, PACKET_vContSupported },
4625 { "QThreadEvents", PACKET_DISABLE, remote_supported_packet, PACKET_QThreadEvents },
4626 { "no-resumed", PACKET_DISABLE, remote_supported_packet, PACKET_no_resumed },
4629 static char *remote_support_xml;
4631 /* Register string appended to "xmlRegisters=" in qSupported query. */
4634 register_remote_support_xml (const char *xml)
4636 #if defined(HAVE_LIBEXPAT)
4637 if (remote_support_xml == NULL)
4638 remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL);
4641 char *copy = xstrdup (remote_support_xml + 13);
4642 char *p = strtok (copy, ",");
4646 if (strcmp (p, xml) == 0)
4653 while ((p = strtok (NULL, ",")) != NULL);
4656 remote_support_xml = reconcat (remote_support_xml,
4657 remote_support_xml, ",", xml,
4664 remote_query_supported_append (char *msg, const char *append)
4667 return reconcat (msg, msg, ";", append, (char *) NULL);
4669 return xstrdup (append);
4673 remote_query_supported (void)
4675 struct remote_state *rs = get_remote_state ();
4678 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
4680 /* The packet support flags are handled differently for this packet
4681 than for most others. We treat an error, a disabled packet, and
4682 an empty response identically: any features which must be reported
4683 to be used will be automatically disabled. An empty buffer
4684 accomplishes this, since that is also the representation for a list
4685 containing no features. */
4688 if (packet_support (PACKET_qSupported) != PACKET_DISABLE)
4691 struct cleanup *old_chain = make_cleanup (free_current_contents, &q);
4693 if (packet_set_cmd_state (PACKET_multiprocess_feature) != AUTO_BOOLEAN_FALSE)
4694 q = remote_query_supported_append (q, "multiprocess+");
4696 if (packet_set_cmd_state (PACKET_swbreak_feature) != AUTO_BOOLEAN_FALSE)
4697 q = remote_query_supported_append (q, "swbreak+");
4698 if (packet_set_cmd_state (PACKET_hwbreak_feature) != AUTO_BOOLEAN_FALSE)
4699 q = remote_query_supported_append (q, "hwbreak+");
4701 q = remote_query_supported_append (q, "qRelocInsn+");
4703 if (packet_set_cmd_state (PACKET_fork_event_feature)
4704 != AUTO_BOOLEAN_FALSE)
4705 q = remote_query_supported_append (q, "fork-events+");
4706 if (packet_set_cmd_state (PACKET_vfork_event_feature)
4707 != AUTO_BOOLEAN_FALSE)
4708 q = remote_query_supported_append (q, "vfork-events+");
4709 if (packet_set_cmd_state (PACKET_exec_event_feature)
4710 != AUTO_BOOLEAN_FALSE)
4711 q = remote_query_supported_append (q, "exec-events+");
4713 if (packet_set_cmd_state (PACKET_vContSupported) != AUTO_BOOLEAN_FALSE)
4714 q = remote_query_supported_append (q, "vContSupported+");
4716 if (packet_set_cmd_state (PACKET_QThreadEvents) != AUTO_BOOLEAN_FALSE)
4717 q = remote_query_supported_append (q, "QThreadEvents+");
4719 if (packet_set_cmd_state (PACKET_no_resumed) != AUTO_BOOLEAN_FALSE)
4720 q = remote_query_supported_append (q, "no-resumed+");
4722 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4723 the qSupported:xmlRegisters=i386 handling. */
4724 if (remote_support_xml != NULL)
4725 q = remote_query_supported_append (q, remote_support_xml);
4727 q = reconcat (q, "qSupported:", q, (char *) NULL);
4730 do_cleanups (old_chain);
4732 getpkt (&rs->buf, &rs->buf_size, 0);
4734 /* If an error occured, warn, but do not return - just reset the
4735 buffer to empty and go on to disable features. */
4736 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
4739 warning (_("Remote failure reply: %s"), rs->buf);
4744 memset (seen, 0, sizeof (seen));
4749 enum packet_support is_supported;
4750 char *p, *end, *name_end, *value;
4752 /* First separate out this item from the rest of the packet. If
4753 there's another item after this, we overwrite the separator
4754 (terminated strings are much easier to work with). */
4756 end = strchr (p, ';');
4759 end = p + strlen (p);
4769 warning (_("empty item in \"qSupported\" response"));
4774 name_end = strchr (p, '=');
4777 /* This is a name=value entry. */
4778 is_supported = PACKET_ENABLE;
4779 value = name_end + 1;
4788 is_supported = PACKET_ENABLE;
4792 is_supported = PACKET_DISABLE;
4796 is_supported = PACKET_SUPPORT_UNKNOWN;
4800 warning (_("unrecognized item \"%s\" "
4801 "in \"qSupported\" response"), p);
4807 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4808 if (strcmp (remote_protocol_features[i].name, p) == 0)
4810 const struct protocol_feature *feature;
4813 feature = &remote_protocol_features[i];
4814 feature->func (feature, is_supported, value);
4819 /* If we increased the packet size, make sure to increase the global
4820 buffer size also. We delay this until after parsing the entire
4821 qSupported packet, because this is the same buffer we were
4823 if (rs->buf_size < rs->explicit_packet_size)
4825 rs->buf_size = rs->explicit_packet_size;
4826 rs->buf = (char *) xrealloc (rs->buf, rs->buf_size);
4829 /* Handle the defaults for unmentioned features. */
4830 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4833 const struct protocol_feature *feature;
4835 feature = &remote_protocol_features[i];
4836 feature->func (feature, feature->default_support, NULL);
4840 /* Remove any of the remote.c targets from target stack. Upper targets depend
4841 on it so remove them first. */
4844 remote_unpush_target (void)
4846 pop_all_targets_at_and_above (process_stratum);
4850 remote_open_1 (const char *name, int from_tty,
4851 struct target_ops *target, int extended_p)
4853 struct remote_state *rs = get_remote_state ();
4856 error (_("To open a remote debug connection, you need to specify what\n"
4857 "serial device is attached to the remote system\n"
4858 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4860 /* See FIXME above. */
4861 if (!target_async_permitted)
4862 wait_forever_enabled_p = 1;
4864 /* If we're connected to a running target, target_preopen will kill it.
4865 Ask this question first, before target_preopen has a chance to kill
4867 if (rs->remote_desc != NULL && !have_inferiors ())
4870 && !query (_("Already connected to a remote target. Disconnect? ")))
4871 error (_("Still connected."));
4874 /* Here the possibly existing remote target gets unpushed. */
4875 target_preopen (from_tty);
4877 /* Make sure we send the passed signals list the next time we resume. */
4878 xfree (rs->last_pass_packet);
4879 rs->last_pass_packet = NULL;
4881 /* Make sure we send the program signals list the next time we
4883 xfree (rs->last_program_signals_packet);
4884 rs->last_program_signals_packet = NULL;
4886 remote_fileio_reset ();
4887 reopen_exec_file ();
4890 rs->remote_desc = remote_serial_open (name);
4891 if (!rs->remote_desc)
4892 perror_with_name (name);
4894 if (baud_rate != -1)
4896 if (serial_setbaudrate (rs->remote_desc, baud_rate))
4898 /* The requested speed could not be set. Error out to
4899 top level after closing remote_desc. Take care to
4900 set remote_desc to NULL to avoid closing remote_desc
4902 serial_close (rs->remote_desc);
4903 rs->remote_desc = NULL;
4904 perror_with_name (name);
4908 serial_setparity (rs->remote_desc, serial_parity);
4909 serial_raw (rs->remote_desc);
4911 /* If there is something sitting in the buffer we might take it as a
4912 response to a command, which would be bad. */
4913 serial_flush_input (rs->remote_desc);
4917 puts_filtered ("Remote debugging using ");
4918 puts_filtered (name);
4919 puts_filtered ("\n");
4921 push_target (target); /* Switch to using remote target now. */
4923 /* Register extra event sources in the event loop. */
4924 remote_async_inferior_event_token
4925 = create_async_event_handler (remote_async_inferior_event_handler,
4927 rs->notif_state = remote_notif_state_allocate ();
4929 /* Reset the target state; these things will be queried either by
4930 remote_query_supported or as they are needed. */
4931 reset_all_packet_configs_support ();
4932 rs->cached_wait_status = 0;
4933 rs->explicit_packet_size = 0;
4935 rs->extended = extended_p;
4936 rs->waiting_for_stop_reply = 0;
4937 rs->ctrlc_pending_p = 0;
4939 rs->general_thread = not_sent_ptid;
4940 rs->continue_thread = not_sent_ptid;
4941 rs->remote_traceframe_number = -1;
4943 /* Probe for ability to use "ThreadInfo" query, as required. */
4944 rs->use_threadinfo_query = 1;
4945 rs->use_threadextra_query = 1;
4947 readahead_cache_invalidate ();
4949 if (target_async_permitted)
4951 /* With this target we start out by owning the terminal. */
4952 remote_async_terminal_ours_p = 1;
4954 /* FIXME: cagney/1999-09-23: During the initial connection it is
4955 assumed that the target is already ready and able to respond to
4956 requests. Unfortunately remote_start_remote() eventually calls
4957 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
4958 around this. Eventually a mechanism that allows
4959 wait_for_inferior() to expect/get timeouts will be
4961 wait_forever_enabled_p = 0;
4964 /* First delete any symbols previously loaded from shared libraries. */
4965 no_shared_libraries (NULL, 0);
4968 init_thread_list ();
4970 /* Start the remote connection. If error() or QUIT, discard this
4971 target (we'd otherwise be in an inconsistent state) and then
4972 propogate the error on up the exception chain. This ensures that
4973 the caller doesn't stumble along blindly assuming that the
4974 function succeeded. The CLI doesn't have this problem but other
4975 UI's, such as MI do.
4977 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
4978 this function should return an error indication letting the
4979 caller restore the previous state. Unfortunately the command
4980 ``target remote'' is directly wired to this function making that
4981 impossible. On a positive note, the CLI side of this problem has
4982 been fixed - the function set_cmd_context() makes it possible for
4983 all the ``target ....'' commands to share a common callback
4984 function. See cli-dump.c. */
4989 remote_start_remote (from_tty, target, extended_p);
4991 CATCH (ex, RETURN_MASK_ALL)
4993 /* Pop the partially set up target - unless something else did
4994 already before throwing the exception. */
4995 if (rs->remote_desc != NULL)
4996 remote_unpush_target ();
4997 if (target_async_permitted)
4998 wait_forever_enabled_p = 1;
4999 throw_exception (ex);
5004 remote_btrace_reset ();
5006 if (target_async_permitted)
5007 wait_forever_enabled_p = 1;
5010 /* Detach the specified process. */
5013 remote_detach_pid (int pid)
5015 struct remote_state *rs = get_remote_state ();
5017 if (remote_multi_process_p (rs))
5018 xsnprintf (rs->buf, get_remote_packet_size (), "D;%x", pid);
5020 strcpy (rs->buf, "D");
5023 getpkt (&rs->buf, &rs->buf_size, 0);
5025 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
5027 else if (rs->buf[0] == '\0')
5028 error (_("Remote doesn't know how to detach"));
5030 error (_("Can't detach process."));
5033 /* This detaches a program to which we previously attached, using
5034 inferior_ptid to identify the process. After this is done, GDB
5035 can be used to debug some other program. We better not have left
5036 any breakpoints in the target program or it'll die when it hits
5040 remote_detach_1 (const char *args, int from_tty)
5042 int pid = ptid_get_pid (inferior_ptid);
5043 struct remote_state *rs = get_remote_state ();
5044 struct thread_info *tp = find_thread_ptid (inferior_ptid);
5048 error (_("Argument given to \"detach\" when remotely debugging."));
5050 if (!target_has_execution)
5051 error (_("No process to detach from."));
5055 char *exec_file = get_exec_file (0);
5056 if (exec_file == NULL)
5058 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
5059 target_pid_to_str (pid_to_ptid (pid)));
5060 gdb_flush (gdb_stdout);
5063 /* Tell the remote target to detach. */
5064 remote_detach_pid (pid);
5066 /* Exit only if this is the only active inferior. */
5067 if (from_tty && !rs->extended && number_of_live_inferiors () == 1)
5068 puts_filtered (_("Ending remote debugging.\n"));
5070 /* Check to see if we are detaching a fork parent. Note that if we
5071 are detaching a fork child, tp == NULL. */
5072 is_fork_parent = (tp != NULL
5073 && tp->pending_follow.kind == TARGET_WAITKIND_FORKED);
5075 /* If doing detach-on-fork, we don't mourn, because that will delete
5076 breakpoints that should be available for the followed inferior. */
5077 if (!is_fork_parent)
5078 target_mourn_inferior ();
5081 inferior_ptid = null_ptid;
5082 detach_inferior (pid);
5087 remote_detach (struct target_ops *ops, const char *args, int from_tty)
5089 remote_detach_1 (args, from_tty);
5093 extended_remote_detach (struct target_ops *ops, const char *args, int from_tty)
5095 remote_detach_1 (args, from_tty);
5098 /* Target follow-fork function for remote targets. On entry, and
5099 at return, the current inferior is the fork parent.
5101 Note that although this is currently only used for extended-remote,
5102 it is named remote_follow_fork in anticipation of using it for the
5103 remote target as well. */
5106 remote_follow_fork (struct target_ops *ops, int follow_child,
5109 struct remote_state *rs = get_remote_state ();
5110 enum target_waitkind kind = inferior_thread ()->pending_follow.kind;
5112 if ((kind == TARGET_WAITKIND_FORKED && remote_fork_event_p (rs))
5113 || (kind == TARGET_WAITKIND_VFORKED && remote_vfork_event_p (rs)))
5115 /* When following the parent and detaching the child, we detach
5116 the child here. For the case of following the child and
5117 detaching the parent, the detach is done in the target-
5118 independent follow fork code in infrun.c. We can't use
5119 target_detach when detaching an unfollowed child because
5120 the client side doesn't know anything about the child. */
5121 if (detach_fork && !follow_child)
5123 /* Detach the fork child. */
5127 child_ptid = inferior_thread ()->pending_follow.value.related_pid;
5128 child_pid = ptid_get_pid (child_ptid);
5130 remote_detach_pid (child_pid);
5131 detach_inferior (child_pid);
5137 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5138 in the program space of the new inferior. On entry and at return the
5139 current inferior is the exec'ing inferior. INF is the new exec'd
5140 inferior, which may be the same as the exec'ing inferior unless
5141 follow-exec-mode is "new". */
5144 remote_follow_exec (struct target_ops *ops,
5145 struct inferior *inf, char *execd_pathname)
5147 /* We know that this is a target file name, so if it has the "target:"
5148 prefix we strip it off before saving it in the program space. */
5149 if (is_target_filename (execd_pathname))
5150 execd_pathname += strlen (TARGET_SYSROOT_PREFIX);
5152 set_pspace_remote_exec_file (inf->pspace, execd_pathname);
5155 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5158 remote_disconnect (struct target_ops *target, const char *args, int from_tty)
5161 error (_("Argument given to \"disconnect\" when remotely debugging."));
5163 /* Make sure we unpush even the extended remote targets. Calling
5164 target_mourn_inferior won't unpush, and remote_mourn won't
5165 unpush if there is more than one inferior left. */
5166 unpush_target (target);
5167 generic_mourn_inferior ();
5170 puts_filtered ("Ending remote debugging.\n");
5173 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5174 be chatty about it. */
5177 extended_remote_attach (struct target_ops *target, const char *args,
5180 struct remote_state *rs = get_remote_state ();
5182 char *wait_status = NULL;
5184 pid = parse_pid_to_attach (args);
5186 /* Remote PID can be freely equal to getpid, do not check it here the same
5187 way as in other targets. */
5189 if (packet_support (PACKET_vAttach) == PACKET_DISABLE)
5190 error (_("This target does not support attaching to a process"));
5194 char *exec_file = get_exec_file (0);
5197 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
5198 target_pid_to_str (pid_to_ptid (pid)));
5200 printf_unfiltered (_("Attaching to %s\n"),
5201 target_pid_to_str (pid_to_ptid (pid)));
5203 gdb_flush (gdb_stdout);
5206 xsnprintf (rs->buf, get_remote_packet_size (), "vAttach;%x", pid);
5208 getpkt (&rs->buf, &rs->buf_size, 0);
5210 switch (packet_ok (rs->buf,
5211 &remote_protocol_packets[PACKET_vAttach]))
5214 if (!target_is_non_stop_p ())
5216 /* Save the reply for later. */
5217 wait_status = (char *) alloca (strlen (rs->buf) + 1);
5218 strcpy (wait_status, rs->buf);
5220 else if (strcmp (rs->buf, "OK") != 0)
5221 error (_("Attaching to %s failed with: %s"),
5222 target_pid_to_str (pid_to_ptid (pid)),
5225 case PACKET_UNKNOWN:
5226 error (_("This target does not support attaching to a process"));
5228 error (_("Attaching to %s failed"),
5229 target_pid_to_str (pid_to_ptid (pid)));
5232 set_current_inferior (remote_add_inferior (0, pid, 1, 0));
5234 inferior_ptid = pid_to_ptid (pid);
5236 if (target_is_non_stop_p ())
5238 struct thread_info *thread;
5240 /* Get list of threads. */
5241 remote_update_thread_list (target);
5243 thread = first_thread_of_process (pid);
5245 inferior_ptid = thread->ptid;
5247 inferior_ptid = pid_to_ptid (pid);
5249 /* Invalidate our notion of the remote current thread. */
5250 record_currthread (rs, minus_one_ptid);
5254 /* Now, if we have thread information, update inferior_ptid. */
5255 inferior_ptid = remote_current_thread (inferior_ptid);
5257 /* Add the main thread to the thread list. */
5258 add_thread_silent (inferior_ptid);
5261 /* Next, if the target can specify a description, read it. We do
5262 this before anything involving memory or registers. */
5263 target_find_description ();
5265 if (!target_is_non_stop_p ())
5267 /* Use the previously fetched status. */
5268 gdb_assert (wait_status != NULL);
5270 if (target_can_async_p ())
5272 struct notif_event *reply
5273 = remote_notif_parse (¬if_client_stop, wait_status);
5275 push_stop_reply ((struct stop_reply *) reply);
5281 gdb_assert (wait_status != NULL);
5282 strcpy (rs->buf, wait_status);
5283 rs->cached_wait_status = 1;
5287 gdb_assert (wait_status == NULL);
5290 /* Implementation of the to_post_attach method. */
5293 extended_remote_post_attach (struct target_ops *ops, int pid)
5295 /* Get text, data & bss offsets. */
5298 /* In certain cases GDB might not have had the chance to start
5299 symbol lookup up until now. This could happen if the debugged
5300 binary is not using shared libraries, the vsyscall page is not
5301 present (on Linux) and the binary itself hadn't changed since the
5302 debugging process was started. */
5303 if (symfile_objfile != NULL)
5304 remote_check_symbols();
5308 /* Check for the availability of vCont. This function should also check
5312 remote_vcont_probe (struct remote_state *rs)
5316 strcpy (rs->buf, "vCont?");
5318 getpkt (&rs->buf, &rs->buf_size, 0);
5321 /* Make sure that the features we assume are supported. */
5322 if (startswith (buf, "vCont"))
5325 int support_c, support_C;
5327 rs->supports_vCont.s = 0;
5328 rs->supports_vCont.S = 0;
5331 rs->supports_vCont.t = 0;
5332 rs->supports_vCont.r = 0;
5333 while (p && *p == ';')
5336 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
5337 rs->supports_vCont.s = 1;
5338 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
5339 rs->supports_vCont.S = 1;
5340 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
5342 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
5344 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
5345 rs->supports_vCont.t = 1;
5346 else if (*p == 'r' && (*(p + 1) == ';' || *(p + 1) == 0))
5347 rs->supports_vCont.r = 1;
5349 p = strchr (p, ';');
5352 /* If c, and C are not all supported, we can't use vCont. Clearing
5353 BUF will make packet_ok disable the packet. */
5354 if (!support_c || !support_C)
5358 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
5361 /* Helper function for building "vCont" resumptions. Write a
5362 resumption to P. ENDP points to one-passed-the-end of the buffer
5363 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5364 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5365 resumed thread should be single-stepped and/or signalled. If PTID
5366 equals minus_one_ptid, then all threads are resumed; if PTID
5367 represents a process, then all threads of the process are resumed;
5368 the thread to be stepped and/or signalled is given in the global
5372 append_resumption (char *p, char *endp,
5373 ptid_t ptid, int step, enum gdb_signal siggnal)
5375 struct remote_state *rs = get_remote_state ();
5377 if (step && siggnal != GDB_SIGNAL_0)
5378 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
5380 /* GDB is willing to range step. */
5381 && use_range_stepping
5382 /* Target supports range stepping. */
5383 && rs->supports_vCont.r
5384 /* We don't currently support range stepping multiple
5385 threads with a wildcard (though the protocol allows it,
5386 so stubs shouldn't make an active effort to forbid
5388 && !(remote_multi_process_p (rs) && ptid_is_pid (ptid)))
5390 struct thread_info *tp;
5392 if (ptid_equal (ptid, minus_one_ptid))
5394 /* If we don't know about the target thread's tid, then
5395 we're resuming magic_null_ptid (see caller). */
5396 tp = find_thread_ptid (magic_null_ptid);
5399 tp = find_thread_ptid (ptid);
5400 gdb_assert (tp != NULL);
5402 if (tp->control.may_range_step)
5404 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
5406 p += xsnprintf (p, endp - p, ";r%s,%s",
5407 phex_nz (tp->control.step_range_start,
5409 phex_nz (tp->control.step_range_end,
5413 p += xsnprintf (p, endp - p, ";s");
5416 p += xsnprintf (p, endp - p, ";s");
5417 else if (siggnal != GDB_SIGNAL_0)
5418 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
5420 p += xsnprintf (p, endp - p, ";c");
5422 if (remote_multi_process_p (rs) && ptid_is_pid (ptid))
5426 /* All (-1) threads of process. */
5427 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
5429 p += xsnprintf (p, endp - p, ":");
5430 p = write_ptid (p, endp, nptid);
5432 else if (!ptid_equal (ptid, minus_one_ptid))
5434 p += xsnprintf (p, endp - p, ":");
5435 p = write_ptid (p, endp, ptid);
5441 /* Clear the thread's private info on resume. */
5444 resume_clear_thread_private_info (struct thread_info *thread)
5446 if (thread->priv != NULL)
5448 thread->priv->stop_reason = TARGET_STOPPED_BY_NO_REASON;
5449 thread->priv->watch_data_address = 0;
5453 /* Append a vCont continue-with-signal action for threads that have a
5454 non-zero stop signal. */
5457 append_pending_thread_resumptions (char *p, char *endp, ptid_t ptid)
5459 struct thread_info *thread;
5461 ALL_NON_EXITED_THREADS (thread)
5462 if (ptid_match (thread->ptid, ptid)
5463 && !ptid_equal (inferior_ptid, thread->ptid)
5464 && thread->suspend.stop_signal != GDB_SIGNAL_0)
5466 p = append_resumption (p, endp, thread->ptid,
5467 0, thread->suspend.stop_signal);
5468 thread->suspend.stop_signal = GDB_SIGNAL_0;
5469 resume_clear_thread_private_info (thread);
5475 /* Resume the remote inferior by using a "vCont" packet. The thread
5476 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5477 resumed thread should be single-stepped and/or signalled. If PTID
5478 equals minus_one_ptid, then all threads are resumed; the thread to
5479 be stepped and/or signalled is given in the global INFERIOR_PTID.
5480 This function returns non-zero iff it resumes the inferior.
5482 This function issues a strict subset of all possible vCont commands at the
5486 remote_vcont_resume (ptid_t ptid, int step, enum gdb_signal siggnal)
5488 struct remote_state *rs = get_remote_state ();
5492 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
5493 remote_vcont_probe (rs);
5495 if (packet_support (PACKET_vCont) == PACKET_DISABLE)
5499 endp = rs->buf + get_remote_packet_size ();
5501 /* If we could generate a wider range of packets, we'd have to worry
5502 about overflowing BUF. Should there be a generic
5503 "multi-part-packet" packet? */
5505 p += xsnprintf (p, endp - p, "vCont");
5507 if (ptid_equal (ptid, magic_null_ptid))
5509 /* MAGIC_NULL_PTID means that we don't have any active threads,
5510 so we don't have any TID numbers the inferior will
5511 understand. Make sure to only send forms that do not specify
5513 append_resumption (p, endp, minus_one_ptid, step, siggnal);
5515 else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
5517 /* Resume all threads (of all processes, or of a single
5518 process), with preference for INFERIOR_PTID. This assumes
5519 inferior_ptid belongs to the set of all threads we are about
5521 if (step || siggnal != GDB_SIGNAL_0)
5523 /* Step inferior_ptid, with or without signal. */
5524 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
5527 /* Also pass down any pending signaled resumption for other
5528 threads not the current. */
5529 p = append_pending_thread_resumptions (p, endp, ptid);
5531 /* And continue others without a signal. */
5532 append_resumption (p, endp, ptid, /*step=*/ 0, GDB_SIGNAL_0);
5536 /* Scheduler locking; resume only PTID. */
5537 append_resumption (p, endp, ptid, step, siggnal);
5540 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
5543 if (target_is_non_stop_p ())
5545 /* In non-stop, the stub replies to vCont with "OK". The stop
5546 reply will be reported asynchronously by means of a `%Stop'
5548 getpkt (&rs->buf, &rs->buf_size, 0);
5549 if (strcmp (rs->buf, "OK") != 0)
5550 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
5556 /* Tell the remote machine to resume. */
5559 remote_resume (struct target_ops *ops,
5560 ptid_t ptid, int step, enum gdb_signal siggnal)
5562 struct remote_state *rs = get_remote_state ();
5564 struct thread_info *thread;
5566 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5567 (explained in remote-notif.c:handle_notification) so
5568 remote_notif_process is not called. We need find a place where
5569 it is safe to start a 'vNotif' sequence. It is good to do it
5570 before resuming inferior, because inferior was stopped and no RSP
5571 traffic at that moment. */
5572 if (!target_is_non_stop_p ())
5573 remote_notif_process (rs->notif_state, ¬if_client_stop);
5575 rs->last_sent_signal = siggnal;
5576 rs->last_sent_step = step;
5578 /* The vCont packet doesn't need to specify threads via Hc. */
5579 /* No reverse support (yet) for vCont. */
5580 if (execution_direction != EXEC_REVERSE)
5581 if (remote_vcont_resume (ptid, step, siggnal))
5584 /* All other supported resume packets do use Hc, so set the continue
5586 if (ptid_equal (ptid, minus_one_ptid))
5587 set_continue_thread (any_thread_ptid);
5589 set_continue_thread (ptid);
5591 ALL_NON_EXITED_THREADS (thread)
5592 resume_clear_thread_private_info (thread);
5595 if (execution_direction == EXEC_REVERSE)
5597 /* We don't pass signals to the target in reverse exec mode. */
5598 if (info_verbose && siggnal != GDB_SIGNAL_0)
5599 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5602 if (step && packet_support (PACKET_bs) == PACKET_DISABLE)
5603 error (_("Remote reverse-step not supported."));
5604 if (!step && packet_support (PACKET_bc) == PACKET_DISABLE)
5605 error (_("Remote reverse-continue not supported."));
5607 strcpy (buf, step ? "bs" : "bc");
5609 else if (siggnal != GDB_SIGNAL_0)
5611 buf[0] = step ? 'S' : 'C';
5612 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
5613 buf[2] = tohex (((int) siggnal) & 0xf);
5617 strcpy (buf, step ? "s" : "c");
5622 /* We are about to start executing the inferior, let's register it
5623 with the event loop. NOTE: this is the one place where all the
5624 execution commands end up. We could alternatively do this in each
5625 of the execution commands in infcmd.c. */
5626 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5627 into infcmd.c in order to allow inferior function calls to work
5628 NOT asynchronously. */
5629 if (target_can_async_p ())
5632 /* We've just told the target to resume. The remote server will
5633 wait for the inferior to stop, and then send a stop reply. In
5634 the mean time, we can't start another command/query ourselves
5635 because the stub wouldn't be ready to process it. This applies
5636 only to the base all-stop protocol, however. In non-stop (which
5637 only supports vCont), the stub replies with an "OK", and is
5638 immediate able to process further serial input. */
5639 if (!target_is_non_stop_p ())
5640 rs->waiting_for_stop_reply = 1;
5644 /* Set up the signal handler for SIGINT, while the target is
5645 executing, ovewriting the 'regular' SIGINT signal handler. */
5647 async_initialize_sigint_signal_handler (void)
5649 signal (SIGINT, async_handle_remote_sigint);
5652 /* Signal handler for SIGINT, while the target is executing. */
5654 async_handle_remote_sigint (int sig)
5656 signal (sig, async_handle_remote_sigint_twice);
5657 /* Note we need to go through gdb_call_async_signal_handler in order
5658 to wake up the event loop on Windows. */
5659 gdb_call_async_signal_handler (async_sigint_remote_token, 0);
5662 /* Signal handler for SIGINT, installed after SIGINT has already been
5663 sent once. It will take effect the second time that the user sends
5666 async_handle_remote_sigint_twice (int sig)
5668 signal (sig, async_handle_remote_sigint);
5669 /* See note in async_handle_remote_sigint. */
5670 gdb_call_async_signal_handler (async_sigint_remote_twice_token, 0);
5673 /* Implementation of to_check_pending_interrupt. */
5676 remote_check_pending_interrupt (struct target_ops *self)
5678 struct async_signal_handler *token = async_sigint_remote_twice_token;
5680 if (async_signal_handler_is_marked (token))
5682 clear_async_signal_handler (token);
5683 call_async_signal_handler (token);
5687 /* Perform the real interruption of the target execution, in response
5690 async_remote_interrupt (gdb_client_data arg)
5693 fprintf_unfiltered (gdb_stdlog, "async_remote_interrupt called\n");
5695 target_interrupt (inferior_ptid);
5698 /* Perform interrupt, if the first attempt did not succeed. Just give
5699 up on the target alltogether. */
5701 async_remote_interrupt_twice (gdb_client_data arg)
5704 fprintf_unfiltered (gdb_stdlog, "async_remote_interrupt_twice called\n");
5709 /* Reinstall the usual SIGINT handlers, after the target has
5712 async_cleanup_sigint_signal_handler (void *dummy)
5714 signal (SIGINT, handle_sigint);
5717 /* Send ^C to target to halt it. Target will respond, and send us a
5719 static void (*ofunc) (int);
5721 /* The command line interface's interrupt routine. This function is installed
5722 as a signal handler for SIGINT. The first time a user requests an
5723 interrupt, we call remote_interrupt to send a break or ^C. If there is no
5724 response from the target (it didn't stop when the user requested it),
5725 we ask the user if he'd like to detach from the target. */
5728 sync_remote_interrupt (int signo)
5730 /* If this doesn't work, try more severe steps. */
5731 signal (signo, sync_remote_interrupt_twice);
5733 gdb_call_async_signal_handler (async_sigint_remote_token, 1);
5736 /* The user typed ^C twice. */
5739 sync_remote_interrupt_twice (int signo)
5741 signal (signo, ofunc);
5742 gdb_call_async_signal_handler (async_sigint_remote_twice_token, 1);
5743 signal (signo, sync_remote_interrupt);
5746 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
5747 thread, all threads of a remote process, or all threads of all
5751 remote_stop_ns (ptid_t ptid)
5753 struct remote_state *rs = get_remote_state ();
5755 char *endp = rs->buf + get_remote_packet_size ();
5757 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
5758 remote_vcont_probe (rs);
5760 if (!rs->supports_vCont.t)
5761 error (_("Remote server does not support stopping threads"));
5763 if (ptid_equal (ptid, minus_one_ptid)
5764 || (!remote_multi_process_p (rs) && ptid_is_pid (ptid)))
5765 p += xsnprintf (p, endp - p, "vCont;t");
5770 p += xsnprintf (p, endp - p, "vCont;t:");
5772 if (ptid_is_pid (ptid))
5773 /* All (-1) threads of process. */
5774 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
5777 /* Small optimization: if we already have a stop reply for
5778 this thread, no use in telling the stub we want this
5780 if (peek_stop_reply (ptid))
5786 write_ptid (p, endp, nptid);
5789 /* In non-stop, we get an immediate OK reply. The stop reply will
5790 come in asynchronously by notification. */
5792 getpkt (&rs->buf, &rs->buf_size, 0);
5793 if (strcmp (rs->buf, "OK") != 0)
5794 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
5797 /* All-stop version of target_interrupt. Sends a break or a ^C to
5798 interrupt the remote target. It is undefined which thread of which
5799 process reports the interrupt. */
5802 remote_interrupt_as (void)
5804 struct remote_state *rs = get_remote_state ();
5806 rs->ctrlc_pending_p = 1;
5808 /* If the inferior is stopped already, but the core didn't know
5809 about it yet, just ignore the request. The cached wait status
5810 will be collected in remote_wait. */
5811 if (rs->cached_wait_status)
5814 /* Send interrupt_sequence to remote target. */
5815 send_interrupt_sequence ();
5818 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
5819 the remote target. It is undefined which thread of which process
5820 reports the interrupt. Returns true if the packet is supported by
5821 the server, false otherwise. */
5824 remote_interrupt_ns (void)
5826 struct remote_state *rs = get_remote_state ();
5828 char *endp = rs->buf + get_remote_packet_size ();
5830 xsnprintf (p, endp - p, "vCtrlC");
5832 /* In non-stop, we get an immediate OK reply. The stop reply will
5833 come in asynchronously by notification. */
5835 getpkt (&rs->buf, &rs->buf_size, 0);
5837 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vCtrlC]))
5841 case PACKET_UNKNOWN:
5844 error (_("Interrupting target failed: %s"), rs->buf);
5850 /* Implement the to_stop function for the remote targets. */
5853 remote_stop (struct target_ops *self, ptid_t ptid)
5856 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
5858 if (target_is_non_stop_p ())
5859 remote_stop_ns (ptid);
5862 /* We don't currently have a way to transparently pause the
5863 remote target in all-stop mode. Interrupt it instead. */
5864 remote_interrupt_as ();
5868 /* Implement the to_interrupt function for the remote targets. */
5871 remote_interrupt (struct target_ops *self, ptid_t ptid)
5874 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
5878 /* In non-stop mode, we always stop with no signal instead. */
5879 remote_stop_ns (ptid);
5883 /* In all-stop, we emulate ^C-ing the remote target's
5885 if (target_is_non_stop_p ())
5887 if (!remote_interrupt_ns ())
5889 /* No support for ^C-ing the remote target. Stop it
5890 (with no signal) instead. */
5891 remote_stop_ns (ptid);
5895 remote_interrupt_as ();
5899 /* Ask the user what to do when an interrupt is received. */
5902 interrupt_query (void)
5904 struct remote_state *rs = get_remote_state ();
5905 struct cleanup *old_chain;
5907 old_chain = make_cleanup_restore_target_terminal ();
5908 target_terminal_ours ();
5910 if (rs->waiting_for_stop_reply && rs->ctrlc_pending_p)
5912 if (query (_("The target is not responding to interrupt requests.\n"
5913 "Stop debugging it? ")))
5915 remote_unpush_target ();
5916 throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target."));
5921 if (query (_("Interrupted while waiting for the program.\n"
5922 "Give up waiting? ")))
5926 do_cleanups (old_chain);
5929 /* Enable/disable target terminal ownership. Most targets can use
5930 terminal groups to control terminal ownership. Remote targets are
5931 different in that explicit transfer of ownership to/from GDB/target
5935 remote_terminal_inferior (struct target_ops *self)
5937 if (!target_async_permitted)
5938 /* Nothing to do. */
5941 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
5942 idempotent. The event-loop GDB talking to an asynchronous target
5943 with a synchronous command calls this function from both
5944 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
5945 transfer the terminal to the target when it shouldn't this guard
5947 if (!remote_async_terminal_ours_p)
5949 delete_file_handler (input_fd);
5950 remote_async_terminal_ours_p = 0;
5951 async_initialize_sigint_signal_handler ();
5952 /* NOTE: At this point we could also register our selves as the
5953 recipient of all input. Any characters typed could then be
5954 passed on down to the target. */
5958 remote_terminal_ours (struct target_ops *self)
5960 if (!target_async_permitted)
5961 /* Nothing to do. */
5964 /* See FIXME in remote_terminal_inferior. */
5965 if (remote_async_terminal_ours_p)
5967 async_cleanup_sigint_signal_handler (NULL);
5968 add_file_handler (input_fd, stdin_event_handler, 0);
5969 remote_async_terminal_ours_p = 1;
5973 remote_console_output (char *msg)
5977 for (p = msg; p[0] && p[1]; p += 2)
5980 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
5984 fputs_unfiltered (tb, gdb_stdtarg);
5986 gdb_flush (gdb_stdtarg);
5989 typedef struct cached_reg
5992 gdb_byte data[MAX_REGISTER_SIZE];
5995 DEF_VEC_O(cached_reg_t);
5997 typedef struct stop_reply
5999 struct notif_event base;
6001 /* The identifier of the thread about this event */
6004 /* The remote state this event is associated with. When the remote
6005 connection, represented by a remote_state object, is closed,
6006 all the associated stop_reply events should be released. */
6007 struct remote_state *rs;
6009 struct target_waitstatus ws;
6011 /* Expedited registers. This makes remote debugging a bit more
6012 efficient for those targets that provide critical registers as
6013 part of their normal status mechanism (as another roundtrip to
6014 fetch them is avoided). */
6015 VEC(cached_reg_t) *regcache;
6017 enum target_stop_reason stop_reason;
6019 CORE_ADDR watch_data_address;
6024 DECLARE_QUEUE_P (stop_reply_p);
6025 DEFINE_QUEUE_P (stop_reply_p);
6026 /* The list of already fetched and acknowledged stop events. This
6027 queue is used for notification Stop, and other notifications
6028 don't need queue for their events, because the notification events
6029 of Stop can't be consumed immediately, so that events should be
6030 queued first, and be consumed by remote_wait_{ns,as} one per
6031 time. Other notifications can consume their events immediately,
6032 so queue is not needed for them. */
6033 static QUEUE (stop_reply_p) *stop_reply_queue;
6036 stop_reply_xfree (struct stop_reply *r)
6038 notif_event_xfree ((struct notif_event *) r);
6041 /* Return the length of the stop reply queue. */
6044 stop_reply_queue_length (void)
6046 return QUEUE_length (stop_reply_p, stop_reply_queue);
6050 remote_notif_stop_parse (struct notif_client *self, char *buf,
6051 struct notif_event *event)
6053 remote_parse_stop_reply (buf, (struct stop_reply *) event);
6057 remote_notif_stop_ack (struct notif_client *self, char *buf,
6058 struct notif_event *event)
6060 struct stop_reply *stop_reply = (struct stop_reply *) event;
6063 putpkt ((char *) self->ack_command);
6065 if (stop_reply->ws.kind == TARGET_WAITKIND_IGNORE)
6066 /* We got an unknown stop reply. */
6067 error (_("Unknown stop reply"));
6069 push_stop_reply (stop_reply);
6073 remote_notif_stop_can_get_pending_events (struct notif_client *self)
6075 /* We can't get pending events in remote_notif_process for
6076 notification stop, and we have to do this in remote_wait_ns
6077 instead. If we fetch all queued events from stub, remote stub
6078 may exit and we have no chance to process them back in
6080 mark_async_event_handler (remote_async_inferior_event_token);
6085 stop_reply_dtr (struct notif_event *event)
6087 struct stop_reply *r = (struct stop_reply *) event;
6089 VEC_free (cached_reg_t, r->regcache);
6092 static struct notif_event *
6093 remote_notif_stop_alloc_reply (void)
6095 /* We cast to a pointer to the "base class". */
6096 struct notif_event *r = (struct notif_event *) XNEW (struct stop_reply);
6098 r->dtr = stop_reply_dtr;
6103 /* A client of notification Stop. */
6105 struct notif_client notif_client_stop =
6109 remote_notif_stop_parse,
6110 remote_notif_stop_ack,
6111 remote_notif_stop_can_get_pending_events,
6112 remote_notif_stop_alloc_reply,
6116 /* A parameter to pass data in and out. */
6118 struct queue_iter_param
6121 struct stop_reply *output;
6124 /* Determine if THREAD is a pending fork parent thread. ARG contains
6125 the pid of the process that owns the threads we want to check, or
6126 -1 if we want to check all threads. */
6129 is_pending_fork_parent (struct target_waitstatus *ws, int event_pid,
6132 if (ws->kind == TARGET_WAITKIND_FORKED
6133 || ws->kind == TARGET_WAITKIND_VFORKED)
6135 if (event_pid == -1 || event_pid == ptid_get_pid (thread_ptid))
6142 /* Check whether EVENT is a fork event, and if it is, remove the
6143 fork child from the context list passed in DATA. */
6146 remove_child_of_pending_fork (QUEUE (stop_reply_p) *q,
6147 QUEUE_ITER (stop_reply_p) *iter,
6151 struct queue_iter_param *param = (struct queue_iter_param *) data;
6152 struct threads_listing_context *context
6153 = (struct threads_listing_context *) param->input;
6155 if (event->ws.kind == TARGET_WAITKIND_FORKED
6156 || event->ws.kind == TARGET_WAITKIND_VFORKED
6157 || event->ws.kind == TARGET_WAITKIND_THREAD_EXITED)
6158 threads_listing_context_remove (&event->ws, context);
6163 /* If CONTEXT contains any fork child threads that have not been
6164 reported yet, remove them from the CONTEXT list. If such a
6165 thread exists it is because we are stopped at a fork catchpoint
6166 and have not yet called follow_fork, which will set up the
6167 host-side data structures for the new process. */
6170 remove_new_fork_children (struct threads_listing_context *context)
6172 struct thread_info * thread;
6174 struct notif_client *notif = ¬if_client_stop;
6175 struct queue_iter_param param;
6177 /* For any threads stopped at a fork event, remove the corresponding
6178 fork child threads from the CONTEXT list. */
6179 ALL_NON_EXITED_THREADS (thread)
6181 struct target_waitstatus *ws = &thread->pending_follow;
6183 if (is_pending_fork_parent (ws, pid, thread->ptid))
6185 threads_listing_context_remove (ws, context);
6189 /* Check for any pending fork events (not reported or processed yet)
6190 in process PID and remove those fork child threads from the
6191 CONTEXT list as well. */
6192 remote_notif_get_pending_events (notif);
6193 param.input = context;
6194 param.output = NULL;
6195 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6196 remove_child_of_pending_fork, ¶m);
6199 /* Remove stop replies in the queue if its pid is equal to the given
6203 remove_stop_reply_for_inferior (QUEUE (stop_reply_p) *q,
6204 QUEUE_ITER (stop_reply_p) *iter,
6208 struct queue_iter_param *param = (struct queue_iter_param *) data;
6209 struct inferior *inf = (struct inferior *) param->input;
6211 if (ptid_get_pid (event->ptid) == inf->pid)
6213 stop_reply_xfree (event);
6214 QUEUE_remove_elem (stop_reply_p, q, iter);
6220 /* Discard all pending stop replies of inferior INF. */
6223 discard_pending_stop_replies (struct inferior *inf)
6226 struct queue_iter_param param;
6227 struct stop_reply *reply;
6228 struct remote_state *rs = get_remote_state ();
6229 struct remote_notif_state *rns = rs->notif_state;
6231 /* This function can be notified when an inferior exists. When the
6232 target is not remote, the notification state is NULL. */
6233 if (rs->remote_desc == NULL)
6236 reply = (struct stop_reply *) rns->pending_event[notif_client_stop.id];
6238 /* Discard the in-flight notification. */
6239 if (reply != NULL && ptid_get_pid (reply->ptid) == inf->pid)
6241 stop_reply_xfree (reply);
6242 rns->pending_event[notif_client_stop.id] = NULL;
6246 param.output = NULL;
6247 /* Discard the stop replies we have already pulled with
6249 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6250 remove_stop_reply_for_inferior, ¶m);
6253 /* If its remote state is equal to the given remote state,
6254 remove EVENT from the stop reply queue. */
6257 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p) *q,
6258 QUEUE_ITER (stop_reply_p) *iter,
6262 struct queue_iter_param *param = (struct queue_iter_param *) data;
6263 struct remote_state *rs = (struct remote_state *) param->input;
6265 if (event->rs == rs)
6267 stop_reply_xfree (event);
6268 QUEUE_remove_elem (stop_reply_p, q, iter);
6274 /* Discard the stop replies for RS in stop_reply_queue. */
6277 discard_pending_stop_replies_in_queue (struct remote_state *rs)
6279 struct queue_iter_param param;
6282 param.output = NULL;
6283 /* Discard the stop replies we have already pulled with
6285 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6286 remove_stop_reply_of_remote_state, ¶m);
6289 /* A parameter to pass data in and out. */
6292 remote_notif_remove_once_on_match (QUEUE (stop_reply_p) *q,
6293 QUEUE_ITER (stop_reply_p) *iter,
6297 struct queue_iter_param *param = (struct queue_iter_param *) data;
6298 ptid_t *ptid = (ptid_t *) param->input;
6300 if (ptid_match (event->ptid, *ptid))
6302 param->output = event;
6303 QUEUE_remove_elem (stop_reply_p, q, iter);
6310 /* Remove the first reply in 'stop_reply_queue' which matches
6313 static struct stop_reply *
6314 remote_notif_remove_queued_reply (ptid_t ptid)
6316 struct queue_iter_param param;
6318 param.input = &ptid;
6319 param.output = NULL;
6321 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6322 remote_notif_remove_once_on_match, ¶m);
6324 fprintf_unfiltered (gdb_stdlog,
6325 "notif: discard queued event: 'Stop' in %s\n",
6326 target_pid_to_str (ptid));
6328 return param.output;
6331 /* Look for a queued stop reply belonging to PTID. If one is found,
6332 remove it from the queue, and return it. Returns NULL if none is
6333 found. If there are still queued events left to process, tell the
6334 event loop to get back to target_wait soon. */
6336 static struct stop_reply *
6337 queued_stop_reply (ptid_t ptid)
6339 struct stop_reply *r = remote_notif_remove_queued_reply (ptid);
6341 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
6342 /* There's still at least an event left. */
6343 mark_async_event_handler (remote_async_inferior_event_token);
6348 /* Push a fully parsed stop reply in the stop reply queue. Since we
6349 know that we now have at least one queued event left to pass to the
6350 core side, tell the event loop to get back to target_wait soon. */
6353 push_stop_reply (struct stop_reply *new_event)
6355 QUEUE_enque (stop_reply_p, stop_reply_queue, new_event);
6358 fprintf_unfiltered (gdb_stdlog,
6359 "notif: push 'Stop' %s to queue %d\n",
6360 target_pid_to_str (new_event->ptid),
6361 QUEUE_length (stop_reply_p,
6364 mark_async_event_handler (remote_async_inferior_event_token);
6368 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p) *q,
6369 QUEUE_ITER (stop_reply_p) *iter,
6370 struct stop_reply *event,
6373 ptid_t *ptid = (ptid_t *) data;
6375 return !(ptid_equal (*ptid, event->ptid)
6376 && event->ws.kind == TARGET_WAITKIND_STOPPED);
6379 /* Returns true if we have a stop reply for PTID. */
6382 peek_stop_reply (ptid_t ptid)
6384 return !QUEUE_iterate (stop_reply_p, stop_reply_queue,
6385 stop_reply_match_ptid_and_ws, &ptid);
6388 /* Skip PACKET until the next semi-colon (or end of string). */
6391 skip_to_semicolon (char *p)
6393 while (*p != '\0' && *p != ';')
6398 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6399 starting with P and ending with PEND matches PREFIX. */
6402 strprefix (const char *p, const char *pend, const char *prefix)
6404 for ( ; p < pend; p++, prefix++)
6407 return *prefix == '\0';
6410 /* Parse the stop reply in BUF. Either the function succeeds, and the
6411 result is stored in EVENT, or throws an error. */
6414 remote_parse_stop_reply (char *buf, struct stop_reply *event)
6416 struct remote_arch_state *rsa = get_remote_arch_state ();
6421 event->ptid = null_ptid;
6422 event->rs = get_remote_state ();
6423 event->ws.kind = TARGET_WAITKIND_IGNORE;
6424 event->ws.value.integer = 0;
6425 event->stop_reason = TARGET_STOPPED_BY_NO_REASON;
6426 event->regcache = NULL;
6431 case 'T': /* Status with PC, SP, FP, ... */
6432 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6433 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6435 n... = register number
6436 r... = register contents
6439 p = &buf[3]; /* after Txx */
6445 p1 = strchr (p, ':');
6447 error (_("Malformed packet(a) (missing colon): %s\n\
6451 error (_("Malformed packet(a) (missing register number): %s\n\
6455 /* Some "registers" are actually extended stop information.
6456 Note if you're adding a new entry here: GDB 7.9 and
6457 earlier assume that all register "numbers" that start
6458 with an hex digit are real register numbers. Make sure
6459 the server only sends such a packet if it knows the
6460 client understands it. */
6462 if (strprefix (p, p1, "thread"))
6463 event->ptid = read_ptid (++p1, &p);
6464 else if (strprefix (p, p1, "syscall_entry"))
6468 event->ws.kind = TARGET_WAITKIND_SYSCALL_ENTRY;
6469 p = unpack_varlen_hex (++p1, &sysno);
6470 event->ws.value.syscall_number = (int) sysno;
6472 else if (strprefix (p, p1, "syscall_return"))
6476 event->ws.kind = TARGET_WAITKIND_SYSCALL_RETURN;
6477 p = unpack_varlen_hex (++p1, &sysno);
6478 event->ws.value.syscall_number = (int) sysno;
6480 else if (strprefix (p, p1, "watch")
6481 || strprefix (p, p1, "rwatch")
6482 || strprefix (p, p1, "awatch"))
6484 event->stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
6485 p = unpack_varlen_hex (++p1, &addr);
6486 event->watch_data_address = (CORE_ADDR) addr;
6488 else if (strprefix (p, p1, "swbreak"))
6490 event->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT;
6492 /* Make sure the stub doesn't forget to indicate support
6494 if (packet_support (PACKET_swbreak_feature) != PACKET_ENABLE)
6495 error (_("Unexpected swbreak stop reason"));
6497 /* The value part is documented as "must be empty",
6498 though we ignore it, in case we ever decide to make
6499 use of it in a backward compatible way. */
6500 p = skip_to_semicolon (p1 + 1);
6502 else if (strprefix (p, p1, "hwbreak"))
6504 event->stop_reason = TARGET_STOPPED_BY_HW_BREAKPOINT;
6506 /* Make sure the stub doesn't forget to indicate support
6508 if (packet_support (PACKET_hwbreak_feature) != PACKET_ENABLE)
6509 error (_("Unexpected hwbreak stop reason"));
6512 p = skip_to_semicolon (p1 + 1);
6514 else if (strprefix (p, p1, "library"))
6516 event->ws.kind = TARGET_WAITKIND_LOADED;
6517 p = skip_to_semicolon (p1 + 1);
6519 else if (strprefix (p, p1, "replaylog"))
6521 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
6522 /* p1 will indicate "begin" or "end", but it makes
6523 no difference for now, so ignore it. */
6524 p = skip_to_semicolon (p1 + 1);
6526 else if (strprefix (p, p1, "core"))
6530 p = unpack_varlen_hex (++p1, &c);
6533 else if (strprefix (p, p1, "fork"))
6535 event->ws.value.related_pid = read_ptid (++p1, &p);
6536 event->ws.kind = TARGET_WAITKIND_FORKED;
6538 else if (strprefix (p, p1, "vfork"))
6540 event->ws.value.related_pid = read_ptid (++p1, &p);
6541 event->ws.kind = TARGET_WAITKIND_VFORKED;
6543 else if (strprefix (p, p1, "vforkdone"))
6545 event->ws.kind = TARGET_WAITKIND_VFORK_DONE;
6546 p = skip_to_semicolon (p1 + 1);
6548 else if (strprefix (p, p1, "exec"))
6551 char pathname[PATH_MAX];
6554 /* Determine the length of the execd pathname. */
6555 p = unpack_varlen_hex (++p1, &ignored);
6556 pathlen = (p - p1) / 2;
6558 /* Save the pathname for event reporting and for
6559 the next run command. */
6560 hex2bin (p1, (gdb_byte *) pathname, pathlen);
6561 pathname[pathlen] = '\0';
6563 /* This is freed during event handling. */
6564 event->ws.value.execd_pathname = xstrdup (pathname);
6565 event->ws.kind = TARGET_WAITKIND_EXECD;
6567 /* Skip the registers included in this packet, since
6568 they may be for an architecture different from the
6569 one used by the original program. */
6572 else if (strprefix (p, p1, "create"))
6574 event->ws.kind = TARGET_WAITKIND_THREAD_CREATED;
6575 p = skip_to_semicolon (p1 + 1);
6584 p = skip_to_semicolon (p1 + 1);
6589 /* Maybe a real ``P'' register number. */
6590 p_temp = unpack_varlen_hex (p, &pnum);
6591 /* If the first invalid character is the colon, we got a
6592 register number. Otherwise, it's an unknown stop
6596 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
6597 cached_reg_t cached_reg;
6600 error (_("Remote sent bad register number %s: %s\n\
6602 hex_string (pnum), p, buf);
6604 cached_reg.num = reg->regnum;
6607 fieldsize = hex2bin (p, cached_reg.data,
6608 register_size (target_gdbarch (),
6611 if (fieldsize < register_size (target_gdbarch (),
6613 warning (_("Remote reply is too short: %s"), buf);
6615 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
6619 /* Not a number. Silently skip unknown optional
6621 p = skip_to_semicolon (p1 + 1);
6626 error (_("Remote register badly formatted: %s\nhere: %s"),
6631 if (event->ws.kind != TARGET_WAITKIND_IGNORE)
6635 case 'S': /* Old style status, just signal only. */
6639 event->ws.kind = TARGET_WAITKIND_STOPPED;
6640 sig = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
6641 if (GDB_SIGNAL_FIRST <= sig && sig < GDB_SIGNAL_LAST)
6642 event->ws.value.sig = (enum gdb_signal) sig;
6644 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
6647 case 'w': /* Thread exited. */
6652 event->ws.kind = TARGET_WAITKIND_THREAD_EXITED;
6653 p = unpack_varlen_hex (&buf[1], &value);
6654 event->ws.value.integer = value;
6656 error (_("stop reply packet badly formatted: %s"), buf);
6657 event->ptid = read_ptid (++p, NULL);
6660 case 'W': /* Target exited. */
6667 /* GDB used to accept only 2 hex chars here. Stubs should
6668 only send more if they detect GDB supports multi-process
6670 p = unpack_varlen_hex (&buf[1], &value);
6674 /* The remote process exited. */
6675 event->ws.kind = TARGET_WAITKIND_EXITED;
6676 event->ws.value.integer = value;
6680 /* The remote process exited with a signal. */
6681 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
6682 if (GDB_SIGNAL_FIRST <= value && value < GDB_SIGNAL_LAST)
6683 event->ws.value.sig = (enum gdb_signal) value;
6685 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
6688 /* If no process is specified, assume inferior_ptid. */
6689 pid = ptid_get_pid (inferior_ptid);
6698 else if (startswith (p, "process:"))
6702 p += sizeof ("process:") - 1;
6703 unpack_varlen_hex (p, &upid);
6707 error (_("unknown stop reply packet: %s"), buf);
6710 error (_("unknown stop reply packet: %s"), buf);
6711 event->ptid = pid_to_ptid (pid);
6715 event->ws.kind = TARGET_WAITKIND_NO_RESUMED;
6716 event->ptid = minus_one_ptid;
6720 if (target_is_non_stop_p () && ptid_equal (event->ptid, null_ptid))
6721 error (_("No process or thread specified in stop reply: %s"), buf);
6724 /* When the stub wants to tell GDB about a new notification reply, it
6725 sends a notification (%Stop, for example). Those can come it at
6726 any time, hence, we have to make sure that any pending
6727 putpkt/getpkt sequence we're making is finished, before querying
6728 the stub for more events with the corresponding ack command
6729 (vStopped, for example). E.g., if we started a vStopped sequence
6730 immediately upon receiving the notification, something like this
6738 1.6) <-- (registers reply to step #1.3)
6740 Obviously, the reply in step #1.6 would be unexpected to a vStopped
6743 To solve this, whenever we parse a %Stop notification successfully,
6744 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
6745 doing whatever we were doing:
6751 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
6752 2.5) <-- (registers reply to step #2.3)
6754 Eventualy after step #2.5, we return to the event loop, which
6755 notices there's an event on the
6756 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
6757 associated callback --- the function below. At this point, we're
6758 always safe to start a vStopped sequence. :
6761 2.7) <-- T05 thread:2
6767 remote_notif_get_pending_events (struct notif_client *nc)
6769 struct remote_state *rs = get_remote_state ();
6771 if (rs->notif_state->pending_event[nc->id] != NULL)
6774 fprintf_unfiltered (gdb_stdlog,
6775 "notif: process: '%s' ack pending event\n",
6779 nc->ack (nc, rs->buf, rs->notif_state->pending_event[nc->id]);
6780 rs->notif_state->pending_event[nc->id] = NULL;
6784 getpkt (&rs->buf, &rs->buf_size, 0);
6785 if (strcmp (rs->buf, "OK") == 0)
6788 remote_notif_ack (nc, rs->buf);
6794 fprintf_unfiltered (gdb_stdlog,
6795 "notif: process: '%s' no pending reply\n",
6800 /* Called when it is decided that STOP_REPLY holds the info of the
6801 event that is to be returned to the core. This function always
6802 destroys STOP_REPLY. */
6805 process_stop_reply (struct stop_reply *stop_reply,
6806 struct target_waitstatus *status)
6810 *status = stop_reply->ws;
6811 ptid = stop_reply->ptid;
6813 /* If no thread/process was reported by the stub, assume the current
6815 if (ptid_equal (ptid, null_ptid))
6816 ptid = inferior_ptid;
6818 if (status->kind != TARGET_WAITKIND_EXITED
6819 && status->kind != TARGET_WAITKIND_SIGNALLED
6820 && status->kind != TARGET_WAITKIND_NO_RESUMED)
6822 struct remote_state *rs = get_remote_state ();
6823 struct private_thread_info *remote_thr;
6825 /* Expedited registers. */
6826 if (stop_reply->regcache)
6828 struct regcache *regcache
6829 = get_thread_arch_regcache (ptid, target_gdbarch ());
6834 VEC_iterate(cached_reg_t, stop_reply->regcache, ix, reg);
6836 regcache_raw_supply (regcache, reg->num, reg->data);
6837 VEC_free (cached_reg_t, stop_reply->regcache);
6840 remote_notice_new_inferior (ptid, 0);
6841 remote_thr = demand_private_info (ptid);
6842 remote_thr->core = stop_reply->core;
6843 remote_thr->stop_reason = stop_reply->stop_reason;
6844 remote_thr->watch_data_address = stop_reply->watch_data_address;
6847 stop_reply_xfree (stop_reply);
6851 /* The non-stop mode version of target_wait. */
6854 remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
6856 struct remote_state *rs = get_remote_state ();
6857 struct stop_reply *stop_reply;
6861 /* If in non-stop mode, get out of getpkt even if a
6862 notification is received. */
6864 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
6865 0 /* forever */, &is_notif);
6868 if (ret != -1 && !is_notif)
6871 case 'E': /* Error of some sort. */
6872 /* We're out of sync with the target now. Did it continue
6873 or not? We can't tell which thread it was in non-stop,
6874 so just ignore this. */
6875 warning (_("Remote failure reply: %s"), rs->buf);
6877 case 'O': /* Console output. */
6878 remote_console_output (rs->buf + 1);
6881 warning (_("Invalid remote reply: %s"), rs->buf);
6885 /* Acknowledge a pending stop reply that may have arrived in the
6887 if (rs->notif_state->pending_event[notif_client_stop.id] != NULL)
6888 remote_notif_get_pending_events (¬if_client_stop);
6890 /* If indeed we noticed a stop reply, we're done. */
6891 stop_reply = queued_stop_reply (ptid);
6892 if (stop_reply != NULL)
6893 return process_stop_reply (stop_reply, status);
6895 /* Still no event. If we're just polling for an event, then
6896 return to the event loop. */
6897 if (options & TARGET_WNOHANG)
6899 status->kind = TARGET_WAITKIND_IGNORE;
6900 return minus_one_ptid;
6903 /* Otherwise do a blocking wait. */
6904 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
6905 1 /* forever */, &is_notif);
6909 /* Wait until the remote machine stops, then return, storing status in
6910 STATUS just as `wait' would. */
6913 remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options)
6915 struct remote_state *rs = get_remote_state ();
6916 ptid_t event_ptid = null_ptid;
6918 struct stop_reply *stop_reply;
6922 status->kind = TARGET_WAITKIND_IGNORE;
6923 status->value.integer = 0;
6925 stop_reply = queued_stop_reply (ptid);
6926 if (stop_reply != NULL)
6927 return process_stop_reply (stop_reply, status);
6929 if (rs->cached_wait_status)
6930 /* Use the cached wait status, but only once. */
6931 rs->cached_wait_status = 0;
6936 int forever = ((options & TARGET_WNOHANG) == 0
6937 && wait_forever_enabled_p);
6939 if (!rs->waiting_for_stop_reply)
6941 status->kind = TARGET_WAITKIND_NO_RESUMED;
6942 return minus_one_ptid;
6945 if (!target_is_async_p ())
6947 ofunc = signal (SIGINT, sync_remote_interrupt);
6948 /* If the user hit C-c before this packet, or between packets,
6949 pretend that it was hit right here. */
6950 if (check_quit_flag ())
6953 sync_remote_interrupt (SIGINT);
6957 /* FIXME: cagney/1999-09-27: If we're in async mode we should
6958 _never_ wait for ever -> test on target_is_async_p().
6959 However, before we do that we need to ensure that the caller
6960 knows how to take the target into/out of async mode. */
6961 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
6962 forever, &is_notif);
6964 if (!target_is_async_p ())
6965 signal (SIGINT, ofunc);
6967 /* GDB gets a notification. Return to core as this event is
6969 if (ret != -1 && is_notif)
6970 return minus_one_ptid;
6972 if (ret == -1 && (options & TARGET_WNOHANG) != 0)
6973 return minus_one_ptid;
6978 /* Assume that the target has acknowledged Ctrl-C unless we receive
6979 an 'F' or 'O' packet. */
6980 if (buf[0] != 'F' && buf[0] != 'O')
6981 rs->ctrlc_pending_p = 0;
6985 case 'E': /* Error of some sort. */
6986 /* We're out of sync with the target now. Did it continue or
6987 not? Not is more likely, so report a stop. */
6988 rs->waiting_for_stop_reply = 0;
6990 warning (_("Remote failure reply: %s"), buf);
6991 status->kind = TARGET_WAITKIND_STOPPED;
6992 status->value.sig = GDB_SIGNAL_0;
6994 case 'F': /* File-I/O request. */
6995 remote_fileio_request (buf, rs->ctrlc_pending_p);
6996 rs->ctrlc_pending_p = 0;
6998 case 'N': case 'T': case 'S': case 'X': case 'W':
7000 struct stop_reply *stop_reply;
7002 /* There is a stop reply to handle. */
7003 rs->waiting_for_stop_reply = 0;
7006 = (struct stop_reply *) remote_notif_parse (¬if_client_stop,
7009 event_ptid = process_stop_reply (stop_reply, status);
7012 case 'O': /* Console output. */
7013 remote_console_output (buf + 1);
7016 if (rs->last_sent_signal != GDB_SIGNAL_0)
7018 /* Zero length reply means that we tried 'S' or 'C' and the
7019 remote system doesn't support it. */
7020 target_terminal_ours_for_output ();
7022 ("Can't send signals to this remote system. %s not sent.\n",
7023 gdb_signal_to_name (rs->last_sent_signal));
7024 rs->last_sent_signal = GDB_SIGNAL_0;
7025 target_terminal_inferior ();
7027 strcpy ((char *) buf, rs->last_sent_step ? "s" : "c");
7028 putpkt ((char *) buf);
7031 /* else fallthrough */
7033 warning (_("Invalid remote reply: %s"), buf);
7037 if (status->kind == TARGET_WAITKIND_NO_RESUMED)
7038 return minus_one_ptid;
7039 else if (status->kind == TARGET_WAITKIND_IGNORE)
7041 /* Nothing interesting happened. If we're doing a non-blocking
7042 poll, we're done. Otherwise, go back to waiting. */
7043 if (options & TARGET_WNOHANG)
7044 return minus_one_ptid;
7048 else if (status->kind != TARGET_WAITKIND_EXITED
7049 && status->kind != TARGET_WAITKIND_SIGNALLED)
7051 if (!ptid_equal (event_ptid, null_ptid))
7052 record_currthread (rs, event_ptid);
7054 event_ptid = inferior_ptid;
7057 /* A process exit. Invalidate our notion of current thread. */
7058 record_currthread (rs, minus_one_ptid);
7063 /* Wait until the remote machine stops, then return, storing status in
7064 STATUS just as `wait' would. */
7067 remote_wait (struct target_ops *ops,
7068 ptid_t ptid, struct target_waitstatus *status, int options)
7072 if (target_is_non_stop_p ())
7073 event_ptid = remote_wait_ns (ptid, status, options);
7075 event_ptid = remote_wait_as (ptid, status, options);
7077 if (target_is_async_p ())
7079 /* If there are are events left in the queue tell the event loop
7081 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
7082 mark_async_event_handler (remote_async_inferior_event_token);
7088 /* Fetch a single register using a 'p' packet. */
7091 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
7093 struct remote_state *rs = get_remote_state ();
7095 char regp[MAX_REGISTER_SIZE];
7098 if (packet_support (PACKET_p) == PACKET_DISABLE)
7101 if (reg->pnum == -1)
7106 p += hexnumstr (p, reg->pnum);
7109 getpkt (&rs->buf, &rs->buf_size, 0);
7113 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
7117 case PACKET_UNKNOWN:
7120 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7121 gdbarch_register_name (get_regcache_arch (regcache),
7126 /* If this register is unfetchable, tell the regcache. */
7129 regcache_raw_supply (regcache, reg->regnum, NULL);
7133 /* Otherwise, parse and supply the value. */
7139 error (_("fetch_register_using_p: early buf termination"));
7141 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
7144 regcache_raw_supply (regcache, reg->regnum, regp);
7148 /* Fetch the registers included in the target's 'g' packet. */
7151 send_g_packet (void)
7153 struct remote_state *rs = get_remote_state ();
7156 xsnprintf (rs->buf, get_remote_packet_size (), "g");
7157 remote_send (&rs->buf, &rs->buf_size);
7159 /* We can get out of synch in various cases. If the first character
7160 in the buffer is not a hex character, assume that has happened
7161 and try to fetch another packet to read. */
7162 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
7163 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
7164 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
7165 && rs->buf[0] != 'x') /* New: unavailable register value. */
7168 fprintf_unfiltered (gdb_stdlog,
7169 "Bad register packet; fetching a new packet\n");
7170 getpkt (&rs->buf, &rs->buf_size, 0);
7173 buf_len = strlen (rs->buf);
7175 /* Sanity check the received packet. */
7176 if (buf_len % 2 != 0)
7177 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
7183 process_g_packet (struct regcache *regcache)
7185 struct gdbarch *gdbarch = get_regcache_arch (regcache);
7186 struct remote_state *rs = get_remote_state ();
7187 struct remote_arch_state *rsa = get_remote_arch_state ();
7192 buf_len = strlen (rs->buf);
7194 /* Further sanity checks, with knowledge of the architecture. */
7195 if (buf_len > 2 * rsa->sizeof_g_packet)
7196 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
7198 /* Save the size of the packet sent to us by the target. It is used
7199 as a heuristic when determining the max size of packets that the
7200 target can safely receive. */
7201 if (rsa->actual_register_packet_size == 0)
7202 rsa->actual_register_packet_size = buf_len;
7204 /* If this is smaller than we guessed the 'g' packet would be,
7205 update our records. A 'g' reply that doesn't include a register's
7206 value implies either that the register is not available, or that
7207 the 'p' packet must be used. */
7208 if (buf_len < 2 * rsa->sizeof_g_packet)
7210 rsa->sizeof_g_packet = buf_len / 2;
7212 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
7214 if (rsa->regs[i].pnum == -1)
7217 if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
7218 rsa->regs[i].in_g_packet = 0;
7220 rsa->regs[i].in_g_packet = 1;
7224 regs = (char *) alloca (rsa->sizeof_g_packet);
7226 /* Unimplemented registers read as all bits zero. */
7227 memset (regs, 0, rsa->sizeof_g_packet);
7229 /* Reply describes registers byte by byte, each byte encoded as two
7230 hex characters. Suck them all up, then supply them to the
7231 register cacheing/storage mechanism. */
7234 for (i = 0; i < rsa->sizeof_g_packet; i++)
7236 if (p[0] == 0 || p[1] == 0)
7237 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7238 internal_error (__FILE__, __LINE__,
7239 _("unexpected end of 'g' packet reply"));
7241 if (p[0] == 'x' && p[1] == 'x')
7242 regs[i] = 0; /* 'x' */
7244 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
7248 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
7250 struct packet_reg *r = &rsa->regs[i];
7254 if (r->offset * 2 >= strlen (rs->buf))
7255 /* This shouldn't happen - we adjusted in_g_packet above. */
7256 internal_error (__FILE__, __LINE__,
7257 _("unexpected end of 'g' packet reply"));
7258 else if (rs->buf[r->offset * 2] == 'x')
7260 gdb_assert (r->offset * 2 < strlen (rs->buf));
7261 /* The register isn't available, mark it as such (at
7262 the same time setting the value to zero). */
7263 regcache_raw_supply (regcache, r->regnum, NULL);
7266 regcache_raw_supply (regcache, r->regnum,
7273 fetch_registers_using_g (struct regcache *regcache)
7276 process_g_packet (regcache);
7279 /* Make the remote selected traceframe match GDB's selected
7283 set_remote_traceframe (void)
7286 struct remote_state *rs = get_remote_state ();
7288 if (rs->remote_traceframe_number == get_traceframe_number ())
7291 /* Avoid recursion, remote_trace_find calls us again. */
7292 rs->remote_traceframe_number = get_traceframe_number ();
7294 newnum = target_trace_find (tfind_number,
7295 get_traceframe_number (), 0, 0, NULL);
7297 /* Should not happen. If it does, all bets are off. */
7298 if (newnum != get_traceframe_number ())
7299 warning (_("could not set remote traceframe"));
7303 remote_fetch_registers (struct target_ops *ops,
7304 struct regcache *regcache, int regnum)
7306 struct remote_arch_state *rsa = get_remote_arch_state ();
7309 set_remote_traceframe ();
7310 set_general_thread (inferior_ptid);
7314 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
7316 gdb_assert (reg != NULL);
7318 /* If this register might be in the 'g' packet, try that first -
7319 we are likely to read more than one register. If this is the
7320 first 'g' packet, we might be overly optimistic about its
7321 contents, so fall back to 'p'. */
7322 if (reg->in_g_packet)
7324 fetch_registers_using_g (regcache);
7325 if (reg->in_g_packet)
7329 if (fetch_register_using_p (regcache, reg))
7332 /* This register is not available. */
7333 regcache_raw_supply (regcache, reg->regnum, NULL);
7338 fetch_registers_using_g (regcache);
7340 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7341 if (!rsa->regs[i].in_g_packet)
7342 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
7344 /* This register is not available. */
7345 regcache_raw_supply (regcache, i, NULL);
7349 /* Prepare to store registers. Since we may send them all (using a
7350 'G' request), we have to read out the ones we don't want to change
7354 remote_prepare_to_store (struct target_ops *self, struct regcache *regcache)
7356 struct remote_arch_state *rsa = get_remote_arch_state ();
7358 gdb_byte buf[MAX_REGISTER_SIZE];
7360 /* Make sure the entire registers array is valid. */
7361 switch (packet_support (PACKET_P))
7363 case PACKET_DISABLE:
7364 case PACKET_SUPPORT_UNKNOWN:
7365 /* Make sure all the necessary registers are cached. */
7366 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7367 if (rsa->regs[i].in_g_packet)
7368 regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
7375 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7376 packet was not recognized. */
7379 store_register_using_P (const struct regcache *regcache,
7380 struct packet_reg *reg)
7382 struct gdbarch *gdbarch = get_regcache_arch (regcache);
7383 struct remote_state *rs = get_remote_state ();
7384 /* Try storing a single register. */
7385 char *buf = rs->buf;
7386 gdb_byte regp[MAX_REGISTER_SIZE];
7389 if (packet_support (PACKET_P) == PACKET_DISABLE)
7392 if (reg->pnum == -1)
7395 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
7396 p = buf + strlen (buf);
7397 regcache_raw_collect (regcache, reg->regnum, regp);
7398 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
7400 getpkt (&rs->buf, &rs->buf_size, 0);
7402 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
7407 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7408 gdbarch_register_name (gdbarch, reg->regnum), rs->buf);
7409 case PACKET_UNKNOWN:
7412 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
7416 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7417 contents of the register cache buffer. FIXME: ignores errors. */
7420 store_registers_using_G (const struct regcache *regcache)
7422 struct remote_state *rs = get_remote_state ();
7423 struct remote_arch_state *rsa = get_remote_arch_state ();
7427 /* Extract all the registers in the regcache copying them into a
7432 regs = (gdb_byte *) alloca (rsa->sizeof_g_packet);
7433 memset (regs, 0, rsa->sizeof_g_packet);
7434 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7436 struct packet_reg *r = &rsa->regs[i];
7439 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
7443 /* Command describes registers byte by byte,
7444 each byte encoded as two hex characters. */
7447 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
7449 bin2hex (regs, p, rsa->sizeof_g_packet);
7451 getpkt (&rs->buf, &rs->buf_size, 0);
7452 if (packet_check_result (rs->buf) == PACKET_ERROR)
7453 error (_("Could not write registers; remote failure reply '%s'"),
7457 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7458 of the register cache buffer. FIXME: ignores errors. */
7461 remote_store_registers (struct target_ops *ops,
7462 struct regcache *regcache, int regnum)
7464 struct remote_arch_state *rsa = get_remote_arch_state ();
7467 set_remote_traceframe ();
7468 set_general_thread (inferior_ptid);
7472 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
7474 gdb_assert (reg != NULL);
7476 /* Always prefer to store registers using the 'P' packet if
7477 possible; we often change only a small number of registers.
7478 Sometimes we change a larger number; we'd need help from a
7479 higher layer to know to use 'G'. */
7480 if (store_register_using_P (regcache, reg))
7483 /* For now, don't complain if we have no way to write the
7484 register. GDB loses track of unavailable registers too
7485 easily. Some day, this may be an error. We don't have
7486 any way to read the register, either... */
7487 if (!reg->in_g_packet)
7490 store_registers_using_G (regcache);
7494 store_registers_using_G (regcache);
7496 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7497 if (!rsa->regs[i].in_g_packet)
7498 if (!store_register_using_P (regcache, &rsa->regs[i]))
7499 /* See above for why we do not issue an error here. */
7504 /* Return the number of hex digits in num. */
7507 hexnumlen (ULONGEST num)
7511 for (i = 0; num != 0; i++)
7517 /* Set BUF to the minimum number of hex digits representing NUM. */
7520 hexnumstr (char *buf, ULONGEST num)
7522 int len = hexnumlen (num);
7524 return hexnumnstr (buf, num, len);
7528 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7531 hexnumnstr (char *buf, ULONGEST num, int width)
7537 for (i = width - 1; i >= 0; i--)
7539 buf[i] = "0123456789abcdef"[(num & 0xf)];
7546 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7549 remote_address_masked (CORE_ADDR addr)
7551 unsigned int address_size = remote_address_size;
7553 /* If "remoteaddresssize" was not set, default to target address size. */
7555 address_size = gdbarch_addr_bit (target_gdbarch ());
7557 if (address_size > 0
7558 && address_size < (sizeof (ULONGEST) * 8))
7560 /* Only create a mask when that mask can safely be constructed
7561 in a ULONGEST variable. */
7564 mask = (mask << address_size) - 1;
7570 /* Determine whether the remote target supports binary downloading.
7571 This is accomplished by sending a no-op memory write of zero length
7572 to the target at the specified address. It does not suffice to send
7573 the whole packet, since many stubs strip the eighth bit and
7574 subsequently compute a wrong checksum, which causes real havoc with
7577 NOTE: This can still lose if the serial line is not eight-bit
7578 clean. In cases like this, the user should clear "remote
7582 check_binary_download (CORE_ADDR addr)
7584 struct remote_state *rs = get_remote_state ();
7586 switch (packet_support (PACKET_X))
7588 case PACKET_DISABLE:
7592 case PACKET_SUPPORT_UNKNOWN:
7598 p += hexnumstr (p, (ULONGEST) addr);
7600 p += hexnumstr (p, (ULONGEST) 0);
7604 putpkt_binary (rs->buf, (int) (p - rs->buf));
7605 getpkt (&rs->buf, &rs->buf_size, 0);
7607 if (rs->buf[0] == '\0')
7610 fprintf_unfiltered (gdb_stdlog,
7611 "binary downloading NOT "
7612 "supported by target\n");
7613 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
7618 fprintf_unfiltered (gdb_stdlog,
7619 "binary downloading supported by target\n");
7620 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
7627 /* Helper function to resize the payload in order to try to get a good
7628 alignment. We try to write an amount of data such that the next write will
7629 start on an address aligned on REMOTE_ALIGN_WRITES. */
7632 align_for_efficient_write (int todo, CORE_ADDR memaddr)
7634 return ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
7637 /* Write memory data directly to the remote machine.
7638 This does not inform the data cache; the data cache uses this.
7639 HEADER is the starting part of the packet.
7640 MEMADDR is the address in the remote memory space.
7641 MYADDR is the address of the buffer in our space.
7642 LEN_UNITS is the number of addressable units to write.
7643 UNIT_SIZE is the length in bytes of an addressable unit.
7644 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
7645 should send data as binary ('X'), or hex-encoded ('M').
7647 The function creates packet of the form
7648 <HEADER><ADDRESS>,<LENGTH>:<DATA>
7650 where encoding of <DATA> is terminated by PACKET_FORMAT.
7652 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
7655 Return the transferred status, error or OK (an
7656 'enum target_xfer_status' value). Save the number of addressable units
7657 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
7659 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
7660 exchange between gdb and the stub could look like (?? in place of the
7666 -> $M1000,3:eeeeffffeeee#??
7670 <- eeeeffffeeeedddd */
7672 static enum target_xfer_status
7673 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
7674 const gdb_byte *myaddr, ULONGEST len_units,
7675 int unit_size, ULONGEST *xfered_len_units,
7676 char packet_format, int use_length)
7678 struct remote_state *rs = get_remote_state ();
7684 int payload_capacity_bytes;
7685 int payload_length_bytes;
7687 if (packet_format != 'X' && packet_format != 'M')
7688 internal_error (__FILE__, __LINE__,
7689 _("remote_write_bytes_aux: bad packet format"));
7692 return TARGET_XFER_EOF;
7694 payload_capacity_bytes = get_memory_write_packet_size ();
7696 /* The packet buffer will be large enough for the payload;
7697 get_memory_packet_size ensures this. */
7700 /* Compute the size of the actual payload by subtracting out the
7701 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
7703 payload_capacity_bytes -= strlen ("$,:#NN");
7705 /* The comma won't be used. */
7706 payload_capacity_bytes += 1;
7707 payload_capacity_bytes -= strlen (header);
7708 payload_capacity_bytes -= hexnumlen (memaddr);
7710 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
7712 strcat (rs->buf, header);
7713 p = rs->buf + strlen (header);
7715 /* Compute a best guess of the number of bytes actually transfered. */
7716 if (packet_format == 'X')
7718 /* Best guess at number of bytes that will fit. */
7719 todo_units = min (len_units, payload_capacity_bytes / unit_size);
7721 payload_capacity_bytes -= hexnumlen (todo_units);
7722 todo_units = min (todo_units, payload_capacity_bytes / unit_size);
7726 /* Number of bytes that will fit. */
7727 todo_units = min (len_units, (payload_capacity_bytes / unit_size) / 2);
7729 payload_capacity_bytes -= hexnumlen (todo_units);
7730 todo_units = min (todo_units, (payload_capacity_bytes / unit_size) / 2);
7733 if (todo_units <= 0)
7734 internal_error (__FILE__, __LINE__,
7735 _("minimum packet size too small to write data"));
7737 /* If we already need another packet, then try to align the end
7738 of this packet to a useful boundary. */
7739 if (todo_units > 2 * REMOTE_ALIGN_WRITES && todo_units < len_units)
7740 todo_units = align_for_efficient_write (todo_units, memaddr);
7742 /* Append "<memaddr>". */
7743 memaddr = remote_address_masked (memaddr);
7744 p += hexnumstr (p, (ULONGEST) memaddr);
7751 /* Append the length and retain its location and size. It may need to be
7752 adjusted once the packet body has been created. */
7754 plenlen = hexnumstr (p, (ULONGEST) todo_units);
7762 /* Append the packet body. */
7763 if (packet_format == 'X')
7765 /* Binary mode. Send target system values byte by byte, in
7766 increasing byte addresses. Only escape certain critical
7768 payload_length_bytes =
7769 remote_escape_output (myaddr, todo_units, unit_size, (gdb_byte *) p,
7770 &units_written, payload_capacity_bytes);
7772 /* If not all TODO units fit, then we'll need another packet. Make
7773 a second try to keep the end of the packet aligned. Don't do
7774 this if the packet is tiny. */
7775 if (units_written < todo_units && units_written > 2 * REMOTE_ALIGN_WRITES)
7779 new_todo_units = align_for_efficient_write (units_written, memaddr);
7781 if (new_todo_units != units_written)
7782 payload_length_bytes =
7783 remote_escape_output (myaddr, new_todo_units, unit_size,
7784 (gdb_byte *) p, &units_written,
7785 payload_capacity_bytes);
7788 p += payload_length_bytes;
7789 if (use_length && units_written < todo_units)
7791 /* Escape chars have filled up the buffer prematurely,
7792 and we have actually sent fewer units than planned.
7793 Fix-up the length field of the packet. Use the same
7794 number of characters as before. */
7795 plen += hexnumnstr (plen, (ULONGEST) units_written,
7797 *plen = ':'; /* overwrite \0 from hexnumnstr() */
7802 /* Normal mode: Send target system values byte by byte, in
7803 increasing byte addresses. Each byte is encoded as a two hex
7805 p += 2 * bin2hex (myaddr, p, todo_units * unit_size);
7806 units_written = todo_units;
7809 putpkt_binary (rs->buf, (int) (p - rs->buf));
7810 getpkt (&rs->buf, &rs->buf_size, 0);
7812 if (rs->buf[0] == 'E')
7813 return TARGET_XFER_E_IO;
7815 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
7816 send fewer units than we'd planned. */
7817 *xfered_len_units = (ULONGEST) units_written;
7818 return TARGET_XFER_OK;
7821 /* Write memory data directly to the remote machine.
7822 This does not inform the data cache; the data cache uses this.
7823 MEMADDR is the address in the remote memory space.
7824 MYADDR is the address of the buffer in our space.
7825 LEN is the number of bytes.
7827 Return the transferred status, error or OK (an
7828 'enum target_xfer_status' value). Save the number of bytes
7829 transferred in *XFERED_LEN. Only transfer a single packet. */
7831 static enum target_xfer_status
7832 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, ULONGEST len,
7833 int unit_size, ULONGEST *xfered_len)
7835 char *packet_format = 0;
7837 /* Check whether the target supports binary download. */
7838 check_binary_download (memaddr);
7840 switch (packet_support (PACKET_X))
7843 packet_format = "X";
7845 case PACKET_DISABLE:
7846 packet_format = "M";
7848 case PACKET_SUPPORT_UNKNOWN:
7849 internal_error (__FILE__, __LINE__,
7850 _("remote_write_bytes: bad internal state"));
7852 internal_error (__FILE__, __LINE__, _("bad switch"));
7855 return remote_write_bytes_aux (packet_format,
7856 memaddr, myaddr, len, unit_size, xfered_len,
7857 packet_format[0], 1);
7860 /* Read memory data directly from the remote machine.
7861 This does not use the data cache; the data cache uses this.
7862 MEMADDR is the address in the remote memory space.
7863 MYADDR is the address of the buffer in our space.
7864 LEN_UNITS is the number of addressable memory units to read..
7865 UNIT_SIZE is the length in bytes of an addressable unit.
7867 Return the transferred status, error or OK (an
7868 'enum target_xfer_status' value). Save the number of bytes
7869 transferred in *XFERED_LEN_UNITS.
7871 See the comment of remote_write_bytes_aux for an example of
7872 memory read/write exchange between gdb and the stub. */
7874 static enum target_xfer_status
7875 remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr, ULONGEST len_units,
7876 int unit_size, ULONGEST *xfered_len_units)
7878 struct remote_state *rs = get_remote_state ();
7879 int buf_size_bytes; /* Max size of packet output buffer. */
7884 buf_size_bytes = get_memory_read_packet_size ();
7885 /* The packet buffer will be large enough for the payload;
7886 get_memory_packet_size ensures this. */
7888 /* Number of units that will fit. */
7889 todo_units = min (len_units, (buf_size_bytes / unit_size) / 2);
7891 /* Construct "m"<memaddr>","<len>". */
7892 memaddr = remote_address_masked (memaddr);
7895 p += hexnumstr (p, (ULONGEST) memaddr);
7897 p += hexnumstr (p, (ULONGEST) todo_units);
7900 getpkt (&rs->buf, &rs->buf_size, 0);
7901 if (rs->buf[0] == 'E'
7902 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
7903 && rs->buf[3] == '\0')
7904 return TARGET_XFER_E_IO;
7905 /* Reply describes memory byte by byte, each byte encoded as two hex
7908 decoded_bytes = hex2bin (p, myaddr, todo_units * unit_size);
7909 /* Return what we have. Let higher layers handle partial reads. */
7910 *xfered_len_units = (ULONGEST) (decoded_bytes / unit_size);
7911 return TARGET_XFER_OK;
7914 /* Using the set of read-only target sections of remote, read live
7917 For interface/parameters/return description see target.h,
7920 static enum target_xfer_status
7921 remote_xfer_live_readonly_partial (struct target_ops *ops, gdb_byte *readbuf,
7922 ULONGEST memaddr, ULONGEST len,
7923 int unit_size, ULONGEST *xfered_len)
7925 struct target_section *secp;
7926 struct target_section_table *table;
7928 secp = target_section_by_addr (ops, memaddr);
7930 && (bfd_get_section_flags (secp->the_bfd_section->owner,
7931 secp->the_bfd_section)
7934 struct target_section *p;
7935 ULONGEST memend = memaddr + len;
7937 table = target_get_section_table (ops);
7939 for (p = table->sections; p < table->sections_end; p++)
7941 if (memaddr >= p->addr)
7943 if (memend <= p->endaddr)
7945 /* Entire transfer is within this section. */
7946 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
7949 else if (memaddr >= p->endaddr)
7951 /* This section ends before the transfer starts. */
7956 /* This section overlaps the transfer. Just do half. */
7957 len = p->endaddr - memaddr;
7958 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
7965 return TARGET_XFER_EOF;
7968 /* Similar to remote_read_bytes_1, but it reads from the remote stub
7969 first if the requested memory is unavailable in traceframe.
7970 Otherwise, fall back to remote_read_bytes_1. */
7972 static enum target_xfer_status
7973 remote_read_bytes (struct target_ops *ops, CORE_ADDR memaddr,
7974 gdb_byte *myaddr, ULONGEST len, int unit_size,
7975 ULONGEST *xfered_len)
7978 return TARGET_XFER_EOF;
7980 if (get_traceframe_number () != -1)
7982 VEC(mem_range_s) *available;
7984 /* If we fail to get the set of available memory, then the
7985 target does not support querying traceframe info, and so we
7986 attempt reading from the traceframe anyway (assuming the
7987 target implements the old QTro packet then). */
7988 if (traceframe_available_memory (&available, memaddr, len))
7990 struct cleanup *old_chain;
7992 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
7994 if (VEC_empty (mem_range_s, available)
7995 || VEC_index (mem_range_s, available, 0)->start != memaddr)
7997 enum target_xfer_status res;
7999 /* Don't read into the traceframe's available
8001 if (!VEC_empty (mem_range_s, available))
8003 LONGEST oldlen = len;
8005 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
8006 gdb_assert (len <= oldlen);
8009 do_cleanups (old_chain);
8011 /* This goes through the topmost target again. */
8012 res = remote_xfer_live_readonly_partial (ops, myaddr, memaddr,
8013 len, unit_size, xfered_len);
8014 if (res == TARGET_XFER_OK)
8015 return TARGET_XFER_OK;
8018 /* No use trying further, we know some memory starting
8019 at MEMADDR isn't available. */
8021 return TARGET_XFER_UNAVAILABLE;
8025 /* Don't try to read more than how much is available, in
8026 case the target implements the deprecated QTro packet to
8027 cater for older GDBs (the target's knowledge of read-only
8028 sections may be outdated by now). */
8029 len = VEC_index (mem_range_s, available, 0)->length;
8031 do_cleanups (old_chain);
8035 return remote_read_bytes_1 (memaddr, myaddr, len, unit_size, xfered_len);
8040 /* Sends a packet with content determined by the printf format string
8041 FORMAT and the remaining arguments, then gets the reply. Returns
8042 whether the packet was a success, a failure, or unknown. */
8044 static enum packet_result remote_send_printf (const char *format, ...)
8045 ATTRIBUTE_PRINTF (1, 2);
8047 static enum packet_result
8048 remote_send_printf (const char *format, ...)
8050 struct remote_state *rs = get_remote_state ();
8051 int max_size = get_remote_packet_size ();
8054 va_start (ap, format);
8057 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
8058 internal_error (__FILE__, __LINE__, _("Too long remote packet."));
8060 if (putpkt (rs->buf) < 0)
8061 error (_("Communication problem with target."));
8064 getpkt (&rs->buf, &rs->buf_size, 0);
8066 return packet_check_result (rs->buf);
8070 restore_remote_timeout (void *p)
8072 int value = *(int *)p;
8074 remote_timeout = value;
8077 /* Flash writing can take quite some time. We'll set
8078 effectively infinite timeout for flash operations.
8079 In future, we'll need to decide on a better approach. */
8080 static const int remote_flash_timeout = 1000;
8083 remote_flash_erase (struct target_ops *ops,
8084 ULONGEST address, LONGEST length)
8086 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
8087 int saved_remote_timeout = remote_timeout;
8088 enum packet_result ret;
8089 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
8090 &saved_remote_timeout);
8092 remote_timeout = remote_flash_timeout;
8094 ret = remote_send_printf ("vFlashErase:%s,%s",
8095 phex (address, addr_size),
8099 case PACKET_UNKNOWN:
8100 error (_("Remote target does not support flash erase"));
8102 error (_("Error erasing flash with vFlashErase packet"));
8107 do_cleanups (back_to);
8110 static enum target_xfer_status
8111 remote_flash_write (struct target_ops *ops, ULONGEST address,
8112 ULONGEST length, ULONGEST *xfered_len,
8113 const gdb_byte *data)
8115 int saved_remote_timeout = remote_timeout;
8116 enum target_xfer_status ret;
8117 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
8118 &saved_remote_timeout);
8120 remote_timeout = remote_flash_timeout;
8121 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 1,
8123 do_cleanups (back_to);
8129 remote_flash_done (struct target_ops *ops)
8131 int saved_remote_timeout = remote_timeout;
8133 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
8134 &saved_remote_timeout);
8136 remote_timeout = remote_flash_timeout;
8137 ret = remote_send_printf ("vFlashDone");
8138 do_cleanups (back_to);
8142 case PACKET_UNKNOWN:
8143 error (_("Remote target does not support vFlashDone"));
8145 error (_("Error finishing flash operation"));
8152 remote_files_info (struct target_ops *ignore)
8154 puts_filtered ("Debugging a target over a serial line.\n");
8157 /* Stuff for dealing with the packets which are part of this protocol.
8158 See comment at top of file for details. */
8160 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8161 error to higher layers. Called when a serial error is detected.
8162 The exception message is STRING, followed by a colon and a blank,
8163 the system error message for errno at function entry and final dot
8164 for output compatibility with throw_perror_with_name. */
8167 unpush_and_perror (const char *string)
8169 int saved_errno = errno;
8171 remote_unpush_target ();
8172 throw_error (TARGET_CLOSE_ERROR, "%s: %s.", string,
8173 safe_strerror (saved_errno));
8176 /* Read a single character from the remote end. */
8179 readchar (int timeout)
8182 struct remote_state *rs = get_remote_state ();
8184 ch = serial_readchar (rs->remote_desc, timeout);
8189 switch ((enum serial_rc) ch)
8192 remote_unpush_target ();
8193 throw_error (TARGET_CLOSE_ERROR, _("Remote connection closed"));
8196 unpush_and_perror (_("Remote communication error. "
8197 "Target disconnected."));
8199 case SERIAL_TIMEOUT:
8205 /* Wrapper for serial_write that closes the target and throws if
8209 remote_serial_write (const char *str, int len)
8211 struct remote_state *rs = get_remote_state ();
8213 if (serial_write (rs->remote_desc, str, len))
8215 unpush_and_perror (_("Remote communication error. "
8216 "Target disconnected."));
8220 /* Send the command in *BUF to the remote machine, and read the reply
8221 into *BUF. Report an error if we get an error reply. Resize
8222 *BUF using xrealloc if necessary to hold the result, and update
8226 remote_send (char **buf,
8230 getpkt (buf, sizeof_buf, 0);
8232 if ((*buf)[0] == 'E')
8233 error (_("Remote failure reply: %s"), *buf);
8236 /* Return a pointer to an xmalloc'ed string representing an escaped
8237 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
8238 etc. The caller is responsible for releasing the returned
8242 escape_buffer (const char *buf, int n)
8244 struct cleanup *old_chain;
8245 struct ui_file *stb;
8248 stb = mem_fileopen ();
8249 old_chain = make_cleanup_ui_file_delete (stb);
8251 fputstrn_unfiltered (buf, n, '\\', stb);
8252 str = ui_file_xstrdup (stb, NULL);
8253 do_cleanups (old_chain);
8257 /* Display a null-terminated packet on stdout, for debugging, using C
8261 print_packet (const char *buf)
8263 puts_filtered ("\"");
8264 fputstr_filtered (buf, '"', gdb_stdout);
8265 puts_filtered ("\"");
8269 putpkt (const char *buf)
8271 return putpkt_binary (buf, strlen (buf));
8274 /* Send a packet to the remote machine, with error checking. The data
8275 of the packet is in BUF. The string in BUF can be at most
8276 get_remote_packet_size () - 5 to account for the $, # and checksum,
8277 and for a possible /0 if we are debugging (remote_debug) and want
8278 to print the sent packet as a string. */
8281 putpkt_binary (const char *buf, int cnt)
8283 struct remote_state *rs = get_remote_state ();
8285 unsigned char csum = 0;
8286 char *buf2 = (char *) xmalloc (cnt + 6);
8287 struct cleanup *old_chain = make_cleanup (xfree, buf2);
8294 /* Catch cases like trying to read memory or listing threads while
8295 we're waiting for a stop reply. The remote server wouldn't be
8296 ready to handle this request, so we'd hang and timeout. We don't
8297 have to worry about this in synchronous mode, because in that
8298 case it's not possible to issue a command while the target is
8299 running. This is not a problem in non-stop mode, because in that
8300 case, the stub is always ready to process serial input. */
8301 if (!target_is_non_stop_p ()
8302 && target_is_async_p ()
8303 && rs->waiting_for_stop_reply)
8305 error (_("Cannot execute this command while the target is running.\n"
8306 "Use the \"interrupt\" command to stop the target\n"
8307 "and then try again."));
8310 /* We're sending out a new packet. Make sure we don't look at a
8311 stale cached response. */
8312 rs->cached_wait_status = 0;
8314 /* Copy the packet into buffer BUF2, encapsulating it
8315 and giving it a checksum. */
8320 for (i = 0; i < cnt; i++)
8326 *p++ = tohex ((csum >> 4) & 0xf);
8327 *p++ = tohex (csum & 0xf);
8329 /* Send it over and over until we get a positive ack. */
8333 int started_error_output = 0;
8337 struct cleanup *old_chain;
8341 str = escape_buffer (buf2, p - buf2);
8342 old_chain = make_cleanup (xfree, str);
8343 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str);
8344 gdb_flush (gdb_stdlog);
8345 do_cleanups (old_chain);
8347 remote_serial_write (buf2, p - buf2);
8349 /* If this is a no acks version of the remote protocol, send the
8350 packet and move on. */
8354 /* Read until either a timeout occurs (-2) or '+' is read.
8355 Handle any notification that arrives in the mean time. */
8358 ch = readchar (remote_timeout);
8366 case SERIAL_TIMEOUT:
8369 if (started_error_output)
8371 putchar_unfiltered ('\n');
8372 started_error_output = 0;
8381 fprintf_unfiltered (gdb_stdlog, "Ack\n");
8382 do_cleanups (old_chain);
8386 fprintf_unfiltered (gdb_stdlog, "Nak\n");
8388 case SERIAL_TIMEOUT:
8392 do_cleanups (old_chain);
8395 break; /* Retransmit buffer. */
8399 fprintf_unfiltered (gdb_stdlog,
8400 "Packet instead of Ack, ignoring it\n");
8401 /* It's probably an old response sent because an ACK
8402 was lost. Gobble up the packet and ack it so it
8403 doesn't get retransmitted when we resend this
8406 remote_serial_write ("+", 1);
8407 continue; /* Now, go look for +. */
8414 /* If we got a notification, handle it, and go back to looking
8416 /* We've found the start of a notification. Now
8417 collect the data. */
8418 val = read_frame (&rs->buf, &rs->buf_size);
8423 struct cleanup *old_chain;
8426 str = escape_buffer (rs->buf, val);
8427 old_chain = make_cleanup (xfree, str);
8428 fprintf_unfiltered (gdb_stdlog,
8429 " Notification received: %s\n",
8431 do_cleanups (old_chain);
8433 handle_notification (rs->notif_state, rs->buf);
8434 /* We're in sync now, rewait for the ack. */
8441 if (!started_error_output)
8443 started_error_output = 1;
8444 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
8446 fputc_unfiltered (ch & 0177, gdb_stdlog);
8447 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
8456 if (!started_error_output)
8458 started_error_output = 1;
8459 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
8461 fputc_unfiltered (ch & 0177, gdb_stdlog);
8465 break; /* Here to retransmit. */
8469 /* This is wrong. If doing a long backtrace, the user should be
8470 able to get out next time we call QUIT, without anything as
8471 violent as interrupt_query. If we want to provide a way out of
8472 here without getting to the next QUIT, it should be based on
8473 hitting ^C twice as in remote_wait. */
8482 do_cleanups (old_chain);
8486 /* Come here after finding the start of a frame when we expected an
8487 ack. Do our best to discard the rest of this packet. */
8496 c = readchar (remote_timeout);
8499 case SERIAL_TIMEOUT:
8500 /* Nothing we can do. */
8503 /* Discard the two bytes of checksum and stop. */
8504 c = readchar (remote_timeout);
8506 c = readchar (remote_timeout);
8509 case '*': /* Run length encoding. */
8510 /* Discard the repeat count. */
8511 c = readchar (remote_timeout);
8516 /* A regular character. */
8522 /* Come here after finding the start of the frame. Collect the rest
8523 into *BUF, verifying the checksum, length, and handling run-length
8524 compression. NUL terminate the buffer. If there is not enough room,
8525 expand *BUF using xrealloc.
8527 Returns -1 on error, number of characters in buffer (ignoring the
8528 trailing NULL) on success. (could be extended to return one of the
8529 SERIAL status indications). */
8532 read_frame (char **buf_p,
8539 struct remote_state *rs = get_remote_state ();
8546 c = readchar (remote_timeout);
8549 case SERIAL_TIMEOUT:
8551 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
8555 fputs_filtered ("Saw new packet start in middle of old one\n",
8557 return -1; /* Start a new packet, count retries. */
8560 unsigned char pktcsum;
8566 check_0 = readchar (remote_timeout);
8568 check_1 = readchar (remote_timeout);
8570 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
8573 fputs_filtered ("Timeout in checksum, retrying\n",
8577 else if (check_0 < 0 || check_1 < 0)
8580 fputs_filtered ("Communication error in checksum\n",
8585 /* Don't recompute the checksum; with no ack packets we
8586 don't have any way to indicate a packet retransmission
8591 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
8592 if (csum == pktcsum)
8597 struct cleanup *old_chain;
8600 str = escape_buffer (buf, bc);
8601 old_chain = make_cleanup (xfree, str);
8602 fprintf_unfiltered (gdb_stdlog,
8603 "Bad checksum, sentsum=0x%x, "
8604 "csum=0x%x, buf=%s\n",
8605 pktcsum, csum, str);
8606 do_cleanups (old_chain);
8608 /* Number of characters in buffer ignoring trailing
8612 case '*': /* Run length encoding. */
8617 c = readchar (remote_timeout);
8619 repeat = c - ' ' + 3; /* Compute repeat count. */
8621 /* The character before ``*'' is repeated. */
8623 if (repeat > 0 && repeat <= 255 && bc > 0)
8625 if (bc + repeat - 1 >= *sizeof_buf - 1)
8627 /* Make some more room in the buffer. */
8628 *sizeof_buf += repeat;
8629 *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf);
8633 memset (&buf[bc], buf[bc - 1], repeat);
8639 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
8643 if (bc >= *sizeof_buf - 1)
8645 /* Make some more room in the buffer. */
8647 *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf);
8658 /* Read a packet from the remote machine, with error checking, and
8659 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
8660 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
8661 rather than timing out; this is used (in synchronous mode) to wait
8662 for a target that is is executing user code to stop. */
8663 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
8664 don't have to change all the calls to getpkt to deal with the
8665 return value, because at the moment I don't know what the right
8666 thing to do it for those. */
8674 timed_out = getpkt_sane (buf, sizeof_buf, forever);
8678 /* Read a packet from the remote machine, with error checking, and
8679 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
8680 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
8681 rather than timing out; this is used (in synchronous mode) to wait
8682 for a target that is is executing user code to stop. If FOREVER ==
8683 0, this function is allowed to time out gracefully and return an
8684 indication of this to the caller. Otherwise return the number of
8685 bytes read. If EXPECTING_NOTIF, consider receiving a notification
8686 enough reason to return to the caller. *IS_NOTIF is an output
8687 boolean that indicates whether *BUF holds a notification or not
8688 (a regular packet). */
8691 getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
8692 int expecting_notif, int *is_notif)
8694 struct remote_state *rs = get_remote_state ();
8700 /* We're reading a new response. Make sure we don't look at a
8701 previously cached response. */
8702 rs->cached_wait_status = 0;
8704 strcpy (*buf, "timeout");
8707 timeout = watchdog > 0 ? watchdog : -1;
8708 else if (expecting_notif)
8709 timeout = 0; /* There should already be a char in the buffer. If
8712 timeout = remote_timeout;
8716 /* Process any number of notifications, and then return when
8720 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
8722 for (tries = 1; tries <= MAX_TRIES; tries++)
8724 /* This can loop forever if the remote side sends us
8725 characters continuously, but if it pauses, we'll get
8726 SERIAL_TIMEOUT from readchar because of timeout. Then
8727 we'll count that as a retry.
8729 Note that even when forever is set, we will only wait
8730 forever prior to the start of a packet. After that, we
8731 expect characters to arrive at a brisk pace. They should
8732 show up within remote_timeout intervals. */
8734 c = readchar (timeout);
8735 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
8737 if (c == SERIAL_TIMEOUT)
8739 if (expecting_notif)
8740 return -1; /* Don't complain, it's normal to not get
8741 anything in this case. */
8743 if (forever) /* Watchdog went off? Kill the target. */
8746 remote_unpush_target ();
8747 throw_error (TARGET_CLOSE_ERROR,
8748 _("Watchdog timeout has expired. "
8749 "Target detached."));
8752 fputs_filtered ("Timed out.\n", gdb_stdlog);
8756 /* We've found the start of a packet or notification.
8757 Now collect the data. */
8758 val = read_frame (buf, sizeof_buf);
8763 remote_serial_write ("-", 1);
8766 if (tries > MAX_TRIES)
8768 /* We have tried hard enough, and just can't receive the
8769 packet/notification. Give up. */
8770 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
8772 /* Skip the ack char if we're in no-ack mode. */
8773 if (!rs->noack_mode)
8774 remote_serial_write ("+", 1);
8778 /* If we got an ordinary packet, return that to our caller. */
8783 struct cleanup *old_chain;
8786 str = escape_buffer (*buf, val);
8787 old_chain = make_cleanup (xfree, str);
8788 fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str);
8789 do_cleanups (old_chain);
8792 /* Skip the ack char if we're in no-ack mode. */
8793 if (!rs->noack_mode)
8794 remote_serial_write ("+", 1);
8795 if (is_notif != NULL)
8800 /* If we got a notification, handle it, and go back to looking
8804 gdb_assert (c == '%');
8808 struct cleanup *old_chain;
8811 str = escape_buffer (*buf, val);
8812 old_chain = make_cleanup (xfree, str);
8813 fprintf_unfiltered (gdb_stdlog,
8814 " Notification received: %s\n",
8816 do_cleanups (old_chain);
8818 if (is_notif != NULL)
8821 handle_notification (rs->notif_state, *buf);
8823 /* Notifications require no acknowledgement. */
8825 if (expecting_notif)
8832 getpkt_sane (char **buf, long *sizeof_buf, int forever)
8834 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0, NULL);
8838 getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever,
8841 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1,
8845 /* Check whether EVENT is a fork event for the process specified
8846 by the pid passed in DATA, and if it is, kill the fork child. */
8849 kill_child_of_pending_fork (QUEUE (stop_reply_p) *q,
8850 QUEUE_ITER (stop_reply_p) *iter,
8854 struct queue_iter_param *param = (struct queue_iter_param *) data;
8855 int parent_pid = *(int *) param->input;
8857 if (is_pending_fork_parent (&event->ws, parent_pid, event->ptid))
8859 struct remote_state *rs = get_remote_state ();
8860 int child_pid = ptid_get_pid (event->ws.value.related_pid);
8863 res = remote_vkill (child_pid, rs);
8865 error (_("Can't kill fork child process %d"), child_pid);
8871 /* Kill any new fork children of process PID that haven't been
8872 processed by follow_fork. */
8875 kill_new_fork_children (int pid, struct remote_state *rs)
8877 struct thread_info *thread;
8878 struct notif_client *notif = ¬if_client_stop;
8879 struct queue_iter_param param;
8881 /* Kill the fork child threads of any threads in process PID
8882 that are stopped at a fork event. */
8883 ALL_NON_EXITED_THREADS (thread)
8885 struct target_waitstatus *ws = &thread->pending_follow;
8887 if (is_pending_fork_parent (ws, pid, thread->ptid))
8889 struct remote_state *rs = get_remote_state ();
8890 int child_pid = ptid_get_pid (ws->value.related_pid);
8893 res = remote_vkill (child_pid, rs);
8895 error (_("Can't kill fork child process %d"), child_pid);
8899 /* Check for any pending fork events (not reported or processed yet)
8900 in process PID and kill those fork child threads as well. */
8901 remote_notif_get_pending_events (notif);
8903 param.output = NULL;
8904 QUEUE_iterate (stop_reply_p, stop_reply_queue,
8905 kill_child_of_pending_fork, ¶m);
8909 /* Target hook to kill the current inferior. */
8912 remote_kill (struct target_ops *ops)
8915 int pid = ptid_get_pid (inferior_ptid);
8916 struct remote_state *rs = get_remote_state ();
8918 if (packet_support (PACKET_vKill) != PACKET_DISABLE)
8920 /* If we're stopped while forking and we haven't followed yet,
8921 kill the child task. We need to do this before killing the
8922 parent task because if this is a vfork then the parent will
8924 kill_new_fork_children (pid, rs);
8926 res = remote_vkill (pid, rs);
8929 target_mourn_inferior ();
8934 /* If we are in 'target remote' mode and we are killing the only
8935 inferior, then we will tell gdbserver to exit and unpush the
8937 if (res == -1 && !remote_multi_process_p (rs)
8938 && number_of_live_inferiors () == 1)
8942 /* We've killed the remote end, we get to mourn it. If we are
8943 not in extended mode, mourning the inferior also unpushes
8944 remote_ops from the target stack, which closes the remote
8946 target_mourn_inferior ();
8951 error (_("Can't kill process"));
8954 /* Send a kill request to the target using the 'vKill' packet. */
8957 remote_vkill (int pid, struct remote_state *rs)
8959 if (packet_support (PACKET_vKill) == PACKET_DISABLE)
8962 /* Tell the remote target to detach. */
8963 xsnprintf (rs->buf, get_remote_packet_size (), "vKill;%x", pid);
8965 getpkt (&rs->buf, &rs->buf_size, 0);
8967 switch (packet_ok (rs->buf,
8968 &remote_protocol_packets[PACKET_vKill]))
8974 case PACKET_UNKNOWN:
8977 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
8981 /* Send a kill request to the target using the 'k' packet. */
8984 remote_kill_k (void)
8986 /* Catch errors so the user can quit from gdb even when we
8987 aren't on speaking terms with the remote system. */
8992 CATCH (ex, RETURN_MASK_ERROR)
8994 if (ex.error == TARGET_CLOSE_ERROR)
8996 /* If we got an (EOF) error that caused the target
8997 to go away, then we're done, that's what we wanted.
8998 "k" is susceptible to cause a premature EOF, given
8999 that the remote server isn't actually required to
9000 reply to "k", and it can happen that it doesn't
9001 even get to reply ACK to the "k". */
9005 /* Otherwise, something went wrong. We didn't actually kill
9006 the target. Just propagate the exception, and let the
9007 user or higher layers decide what to do. */
9008 throw_exception (ex);
9014 remote_mourn (struct target_ops *target)
9016 struct remote_state *rs = get_remote_state ();
9018 /* In 'target remote' mode with one inferior, we close the connection. */
9019 if (!rs->extended && number_of_live_inferiors () <= 1)
9021 unpush_target (target);
9023 /* remote_close takes care of doing most of the clean up. */
9024 generic_mourn_inferior ();
9028 /* In case we got here due to an error, but we're going to stay
9030 rs->waiting_for_stop_reply = 0;
9032 /* If the current general thread belonged to the process we just
9033 detached from or has exited, the remote side current general
9034 thread becomes undefined. Considering a case like this:
9036 - We just got here due to a detach.
9037 - The process that we're detaching from happens to immediately
9038 report a global breakpoint being hit in non-stop mode, in the
9039 same thread we had selected before.
9040 - GDB attaches to this process again.
9041 - This event happens to be the next event we handle.
9043 GDB would consider that the current general thread didn't need to
9044 be set on the stub side (with Hg), since for all it knew,
9045 GENERAL_THREAD hadn't changed.
9047 Notice that although in all-stop mode, the remote server always
9048 sets the current thread to the thread reporting the stop event,
9049 that doesn't happen in non-stop mode; in non-stop, the stub *must
9050 not* change the current thread when reporting a breakpoint hit,
9051 due to the decoupling of event reporting and event handling.
9053 To keep things simple, we always invalidate our notion of the
9055 record_currthread (rs, minus_one_ptid);
9057 /* Call common code to mark the inferior as not running. */
9058 generic_mourn_inferior ();
9060 if (!have_inferiors ())
9062 if (!remote_multi_process_p (rs))
9064 /* Check whether the target is running now - some remote stubs
9065 automatically restart after kill. */
9067 getpkt (&rs->buf, &rs->buf_size, 0);
9069 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
9071 /* Assume that the target has been restarted. Set
9072 inferior_ptid so that bits of core GDB realizes
9073 there's something here, e.g., so that the user can
9074 say "kill" again. */
9075 inferior_ptid = magic_null_ptid;
9082 extended_remote_supports_disable_randomization (struct target_ops *self)
9084 return packet_support (PACKET_QDisableRandomization) == PACKET_ENABLE;
9088 extended_remote_disable_randomization (int val)
9090 struct remote_state *rs = get_remote_state ();
9093 xsnprintf (rs->buf, get_remote_packet_size (), "QDisableRandomization:%x",
9096 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
9098 error (_("Target does not support QDisableRandomization."));
9099 if (strcmp (reply, "OK") != 0)
9100 error (_("Bogus QDisableRandomization reply from target: %s"), reply);
9104 extended_remote_run (char *args)
9106 struct remote_state *rs = get_remote_state ();
9108 const char *remote_exec_file = get_remote_exec_file ();
9110 /* If the user has disabled vRun support, or we have detected that
9111 support is not available, do not try it. */
9112 if (packet_support (PACKET_vRun) == PACKET_DISABLE)
9115 strcpy (rs->buf, "vRun;");
9116 len = strlen (rs->buf);
9118 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
9119 error (_("Remote file name too long for run packet"));
9120 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len,
9121 strlen (remote_exec_file));
9123 gdb_assert (args != NULL);
9126 struct cleanup *back_to;
9130 argv = gdb_buildargv (args);
9131 back_to = make_cleanup_freeargv (argv);
9132 for (i = 0; argv[i] != NULL; i++)
9134 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
9135 error (_("Argument list too long for run packet"));
9136 rs->buf[len++] = ';';
9137 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len,
9140 do_cleanups (back_to);
9143 rs->buf[len++] = '\0';
9146 getpkt (&rs->buf, &rs->buf_size, 0);
9148 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]))
9151 /* We have a wait response. All is well. */
9153 case PACKET_UNKNOWN:
9156 if (remote_exec_file[0] == '\0')
9157 error (_("Running the default executable on the remote target failed; "
9158 "try \"set remote exec-file\"?"));
9160 error (_("Running \"%s\" on the remote target failed"),
9163 gdb_assert_not_reached (_("bad switch"));
9167 /* In the extended protocol we want to be able to do things like
9168 "run" and have them basically work as expected. So we need
9169 a special create_inferior function. We support changing the
9170 executable file and the command line arguments, but not the
9174 extended_remote_create_inferior (struct target_ops *ops,
9175 char *exec_file, char *args,
9176 char **env, int from_tty)
9180 struct remote_state *rs = get_remote_state ();
9181 const char *remote_exec_file = get_remote_exec_file ();
9183 /* If running asynchronously, register the target file descriptor
9184 with the event loop. */
9185 if (target_can_async_p ())
9188 /* Disable address space randomization if requested (and supported). */
9189 if (extended_remote_supports_disable_randomization (ops))
9190 extended_remote_disable_randomization (disable_randomization);
9192 /* Now restart the remote server. */
9193 run_worked = extended_remote_run (args) != -1;
9196 /* vRun was not supported. Fail if we need it to do what the
9198 if (remote_exec_file[0])
9199 error (_("Remote target does not support \"set remote exec-file\""));
9201 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9203 /* Fall back to "R". */
9204 extended_remote_restart ();
9207 if (!have_inferiors ())
9209 /* Clean up from the last time we ran, before we mark the target
9210 running again. This will mark breakpoints uninserted, and
9211 get_offsets may insert breakpoints. */
9212 init_thread_list ();
9213 init_wait_for_inferior ();
9216 /* vRun's success return is a stop reply. */
9217 stop_reply = run_worked ? rs->buf : NULL;
9218 add_current_inferior_and_thread (stop_reply);
9220 /* Get updated offsets, if the stub uses qOffsets. */
9225 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9226 the list of conditions (in agent expression bytecode format), if any, the
9227 target needs to evaluate. The output is placed into the packet buffer
9228 started from BUF and ended at BUF_END. */
9231 remote_add_target_side_condition (struct gdbarch *gdbarch,
9232 struct bp_target_info *bp_tgt, char *buf,
9235 struct agent_expr *aexpr = NULL;
9238 char *buf_start = buf;
9240 if (VEC_empty (agent_expr_p, bp_tgt->conditions))
9243 buf += strlen (buf);
9244 xsnprintf (buf, buf_end - buf, "%s", ";");
9247 /* Send conditions to the target and free the vector. */
9249 VEC_iterate (agent_expr_p, bp_tgt->conditions, ix, aexpr);
9252 xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len);
9253 buf += strlen (buf);
9254 for (i = 0; i < aexpr->len; ++i)
9255 buf = pack_hex_byte (buf, aexpr->buf[i]);
9262 remote_add_target_side_commands (struct gdbarch *gdbarch,
9263 struct bp_target_info *bp_tgt, char *buf)
9265 struct agent_expr *aexpr = NULL;
9268 if (VEC_empty (agent_expr_p, bp_tgt->tcommands))
9271 buf += strlen (buf);
9273 sprintf (buf, ";cmds:%x,", bp_tgt->persist);
9274 buf += strlen (buf);
9276 /* Concatenate all the agent expressions that are commands into the
9279 VEC_iterate (agent_expr_p, bp_tgt->tcommands, ix, aexpr);
9282 sprintf (buf, "X%x,", aexpr->len);
9283 buf += strlen (buf);
9284 for (i = 0; i < aexpr->len; ++i)
9285 buf = pack_hex_byte (buf, aexpr->buf[i]);
9290 /* Insert a breakpoint. On targets that have software breakpoint
9291 support, we ask the remote target to do the work; on targets
9292 which don't, we insert a traditional memory breakpoint. */
9295 remote_insert_breakpoint (struct target_ops *ops,
9296 struct gdbarch *gdbarch,
9297 struct bp_target_info *bp_tgt)
9299 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9300 If it succeeds, then set the support to PACKET_ENABLE. If it
9301 fails, and the user has explicitly requested the Z support then
9302 report an error, otherwise, mark it disabled and go on. */
9304 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
9306 CORE_ADDR addr = bp_tgt->reqstd_address;
9307 struct remote_state *rs;
9310 struct condition_list *cond = NULL;
9312 /* Make sure the remote is pointing at the right process, if
9314 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9315 set_general_process ();
9317 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
9319 rs = get_remote_state ();
9321 endbuf = rs->buf + get_remote_packet_size ();
9326 addr = (ULONGEST) remote_address_masked (addr);
9327 p += hexnumstr (p, addr);
9328 xsnprintf (p, endbuf - p, ",%d", bpsize);
9330 if (remote_supports_cond_breakpoints (ops))
9331 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
9333 if (remote_can_run_breakpoint_commands (ops))
9334 remote_add_target_side_commands (gdbarch, bp_tgt, p);
9337 getpkt (&rs->buf, &rs->buf_size, 0);
9339 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
9344 bp_tgt->placed_address = addr;
9345 bp_tgt->placed_size = bpsize;
9347 case PACKET_UNKNOWN:
9352 /* If this breakpoint has target-side commands but this stub doesn't
9353 support Z0 packets, throw error. */
9354 if (!VEC_empty (agent_expr_p, bp_tgt->tcommands))
9355 throw_error (NOT_SUPPORTED_ERROR, _("\
9356 Target doesn't support breakpoints that have target side commands."));
9358 return memory_insert_breakpoint (ops, gdbarch, bp_tgt);
9362 remote_remove_breakpoint (struct target_ops *ops,
9363 struct gdbarch *gdbarch,
9364 struct bp_target_info *bp_tgt)
9366 CORE_ADDR addr = bp_tgt->placed_address;
9367 struct remote_state *rs = get_remote_state ();
9369 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
9372 char *endbuf = rs->buf + get_remote_packet_size ();
9374 /* Make sure the remote is pointing at the right process, if
9376 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9377 set_general_process ();
9383 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
9384 p += hexnumstr (p, addr);
9385 xsnprintf (p, endbuf - p, ",%d", bp_tgt->placed_size);
9388 getpkt (&rs->buf, &rs->buf_size, 0);
9390 return (rs->buf[0] == 'E');
9393 return memory_remove_breakpoint (ops, gdbarch, bp_tgt);
9396 static enum Z_packet_type
9397 watchpoint_to_Z_packet (int type)
9402 return Z_PACKET_WRITE_WP;
9405 return Z_PACKET_READ_WP;
9408 return Z_PACKET_ACCESS_WP;
9411 internal_error (__FILE__, __LINE__,
9412 _("hw_bp_to_z: bad watchpoint type %d"), type);
9417 remote_insert_watchpoint (struct target_ops *self, CORE_ADDR addr, int len,
9418 enum target_hw_bp_type type, struct expression *cond)
9420 struct remote_state *rs = get_remote_state ();
9421 char *endbuf = rs->buf + get_remote_packet_size ();
9423 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
9425 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
9428 /* Make sure the remote is pointing at the right process, if
9430 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9431 set_general_process ();
9433 xsnprintf (rs->buf, endbuf - rs->buf, "Z%x,", packet);
9434 p = strchr (rs->buf, '\0');
9435 addr = remote_address_masked (addr);
9436 p += hexnumstr (p, (ULONGEST) addr);
9437 xsnprintf (p, endbuf - p, ",%x", len);
9440 getpkt (&rs->buf, &rs->buf_size, 0);
9442 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
9446 case PACKET_UNKNOWN:
9451 internal_error (__FILE__, __LINE__,
9452 _("remote_insert_watchpoint: reached end of function"));
9456 remote_watchpoint_addr_within_range (struct target_ops *target, CORE_ADDR addr,
9457 CORE_ADDR start, int length)
9459 CORE_ADDR diff = remote_address_masked (addr - start);
9461 return diff < length;
9466 remote_remove_watchpoint (struct target_ops *self, CORE_ADDR addr, int len,
9467 enum target_hw_bp_type type, struct expression *cond)
9469 struct remote_state *rs = get_remote_state ();
9470 char *endbuf = rs->buf + get_remote_packet_size ();
9472 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
9474 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
9477 /* Make sure the remote is pointing at the right process, if
9479 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9480 set_general_process ();
9482 xsnprintf (rs->buf, endbuf - rs->buf, "z%x,", packet);
9483 p = strchr (rs->buf, '\0');
9484 addr = remote_address_masked (addr);
9485 p += hexnumstr (p, (ULONGEST) addr);
9486 xsnprintf (p, endbuf - p, ",%x", len);
9488 getpkt (&rs->buf, &rs->buf_size, 0);
9490 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
9493 case PACKET_UNKNOWN:
9498 internal_error (__FILE__, __LINE__,
9499 _("remote_remove_watchpoint: reached end of function"));
9503 int remote_hw_watchpoint_limit = -1;
9504 int remote_hw_watchpoint_length_limit = -1;
9505 int remote_hw_breakpoint_limit = -1;
9508 remote_region_ok_for_hw_watchpoint (struct target_ops *self,
9509 CORE_ADDR addr, int len)
9511 if (remote_hw_watchpoint_length_limit == 0)
9513 else if (remote_hw_watchpoint_length_limit < 0)
9515 else if (len <= remote_hw_watchpoint_length_limit)
9522 remote_check_watch_resources (struct target_ops *self,
9523 enum bptype type, int cnt, int ot)
9525 if (type == bp_hardware_breakpoint)
9527 if (remote_hw_breakpoint_limit == 0)
9529 else if (remote_hw_breakpoint_limit < 0)
9531 else if (cnt <= remote_hw_breakpoint_limit)
9536 if (remote_hw_watchpoint_limit == 0)
9538 else if (remote_hw_watchpoint_limit < 0)
9542 else if (cnt <= remote_hw_watchpoint_limit)
9548 /* The to_stopped_by_sw_breakpoint method of target remote. */
9551 remote_stopped_by_sw_breakpoint (struct target_ops *ops)
9553 struct thread_info *thread = inferior_thread ();
9555 return (thread->priv != NULL
9556 && thread->priv->stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT);
9559 /* The to_supports_stopped_by_sw_breakpoint method of target
9563 remote_supports_stopped_by_sw_breakpoint (struct target_ops *ops)
9565 struct remote_state *rs = get_remote_state ();
9567 return (packet_support (PACKET_swbreak_feature) == PACKET_ENABLE);
9570 /* The to_stopped_by_hw_breakpoint method of target remote. */
9573 remote_stopped_by_hw_breakpoint (struct target_ops *ops)
9575 struct thread_info *thread = inferior_thread ();
9577 return (thread->priv != NULL
9578 && thread->priv->stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT);
9581 /* The to_supports_stopped_by_hw_breakpoint method of target
9585 remote_supports_stopped_by_hw_breakpoint (struct target_ops *ops)
9587 struct remote_state *rs = get_remote_state ();
9589 return (packet_support (PACKET_hwbreak_feature) == PACKET_ENABLE);
9593 remote_stopped_by_watchpoint (struct target_ops *ops)
9595 struct thread_info *thread = inferior_thread ();
9597 return (thread->priv != NULL
9598 && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT);
9602 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
9604 struct thread_info *thread = inferior_thread ();
9606 if (thread->priv != NULL
9607 && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT)
9609 *addr_p = thread->priv->watch_data_address;
9618 remote_insert_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
9619 struct bp_target_info *bp_tgt)
9621 CORE_ADDR addr = bp_tgt->reqstd_address;
9622 struct remote_state *rs;
9627 /* The length field should be set to the size of a breakpoint
9628 instruction, even though we aren't inserting one ourselves. */
9630 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
9632 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
9635 /* Make sure the remote is pointing at the right process, if
9637 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9638 set_general_process ();
9640 rs = get_remote_state ();
9642 endbuf = rs->buf + get_remote_packet_size ();
9648 addr = remote_address_masked (addr);
9649 p += hexnumstr (p, (ULONGEST) addr);
9650 xsnprintf (p, endbuf - p, ",%x", bpsize);
9652 if (remote_supports_cond_breakpoints (self))
9653 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
9655 if (remote_can_run_breakpoint_commands (self))
9656 remote_add_target_side_commands (gdbarch, bp_tgt, p);
9659 getpkt (&rs->buf, &rs->buf_size, 0);
9661 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
9664 if (rs->buf[1] == '.')
9666 message = strchr (rs->buf + 2, '.');
9668 error (_("Remote failure reply: %s"), message + 1);
9671 case PACKET_UNKNOWN:
9674 bp_tgt->placed_address = addr;
9675 bp_tgt->placed_size = bpsize;
9678 internal_error (__FILE__, __LINE__,
9679 _("remote_insert_hw_breakpoint: reached end of function"));
9684 remote_remove_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
9685 struct bp_target_info *bp_tgt)
9688 struct remote_state *rs = get_remote_state ();
9690 char *endbuf = rs->buf + get_remote_packet_size ();
9692 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
9695 /* Make sure the remote is pointing at the right process, if
9697 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9698 set_general_process ();
9704 addr = remote_address_masked (bp_tgt->placed_address);
9705 p += hexnumstr (p, (ULONGEST) addr);
9706 xsnprintf (p, endbuf - p, ",%x", bp_tgt->placed_size);
9709 getpkt (&rs->buf, &rs->buf_size, 0);
9711 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
9714 case PACKET_UNKNOWN:
9719 internal_error (__FILE__, __LINE__,
9720 _("remote_remove_hw_breakpoint: reached end of function"));
9723 /* Verify memory using the "qCRC:" request. */
9726 remote_verify_memory (struct target_ops *ops,
9727 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
9729 struct remote_state *rs = get_remote_state ();
9730 unsigned long host_crc, target_crc;
9733 /* It doesn't make sense to use qCRC if the remote target is
9734 connected but not running. */
9735 if (target_has_execution && packet_support (PACKET_qCRC) != PACKET_DISABLE)
9737 enum packet_result result;
9739 /* Make sure the remote is pointing at the right process. */
9740 set_general_process ();
9742 /* FIXME: assumes lma can fit into long. */
9743 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
9744 (long) lma, (long) size);
9747 /* Be clever; compute the host_crc before waiting for target
9749 host_crc = xcrc32 (data, size, 0xffffffff);
9751 getpkt (&rs->buf, &rs->buf_size, 0);
9753 result = packet_ok (rs->buf,
9754 &remote_protocol_packets[PACKET_qCRC]);
9755 if (result == PACKET_ERROR)
9757 else if (result == PACKET_OK)
9759 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
9760 target_crc = target_crc * 16 + fromhex (*tmp);
9762 return (host_crc == target_crc);
9766 return simple_verify_memory (ops, data, lma, size);
9769 /* compare-sections command
9771 With no arguments, compares each loadable section in the exec bfd
9772 with the same memory range on the target, and reports mismatches.
9773 Useful for verifying the image on the target against the exec file. */
9776 compare_sections_command (char *args, int from_tty)
9779 struct cleanup *old_chain;
9781 const char *sectname;
9790 error (_("command cannot be used without an exec file"));
9792 /* Make sure the remote is pointing at the right process. */
9793 set_general_process ();
9795 if (args != NULL && strcmp (args, "-r") == 0)
9801 for (s = exec_bfd->sections; s; s = s->next)
9803 if (!(s->flags & SEC_LOAD))
9804 continue; /* Skip non-loadable section. */
9806 if (read_only && (s->flags & SEC_READONLY) == 0)
9807 continue; /* Skip writeable sections */
9809 size = bfd_get_section_size (s);
9811 continue; /* Skip zero-length section. */
9813 sectname = bfd_get_section_name (exec_bfd, s);
9814 if (args && strcmp (args, sectname) != 0)
9815 continue; /* Not the section selected by user. */
9817 matched = 1; /* Do this section. */
9820 sectdata = (gdb_byte *) xmalloc (size);
9821 old_chain = make_cleanup (xfree, sectdata);
9822 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
9824 res = target_verify_memory (sectdata, lma, size);
9827 error (_("target memory fault, section %s, range %s -- %s"), sectname,
9828 paddress (target_gdbarch (), lma),
9829 paddress (target_gdbarch (), lma + size));
9831 printf_filtered ("Section %s, range %s -- %s: ", sectname,
9832 paddress (target_gdbarch (), lma),
9833 paddress (target_gdbarch (), lma + size));
9835 printf_filtered ("matched.\n");
9838 printf_filtered ("MIS-MATCHED!\n");
9842 do_cleanups (old_chain);
9845 warning (_("One or more sections of the target image does not match\n\
9846 the loaded file\n"));
9847 if (args && !matched)
9848 printf_filtered (_("No loaded section named '%s'.\n"), args);
9851 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
9852 into remote target. The number of bytes written to the remote
9853 target is returned, or -1 for error. */
9855 static enum target_xfer_status
9856 remote_write_qxfer (struct target_ops *ops, const char *object_name,
9857 const char *annex, const gdb_byte *writebuf,
9858 ULONGEST offset, LONGEST len, ULONGEST *xfered_len,
9859 struct packet_config *packet)
9863 struct remote_state *rs = get_remote_state ();
9864 int max_size = get_memory_write_packet_size ();
9866 if (packet->support == PACKET_DISABLE)
9867 return TARGET_XFER_E_IO;
9869 /* Insert header. */
9870 i = snprintf (rs->buf, max_size,
9871 "qXfer:%s:write:%s:%s:",
9872 object_name, annex ? annex : "",
9873 phex_nz (offset, sizeof offset));
9874 max_size -= (i + 1);
9876 /* Escape as much data as fits into rs->buf. */
9877 buf_len = remote_escape_output
9878 (writebuf, len, 1, (gdb_byte *) rs->buf + i, &max_size, max_size);
9880 if (putpkt_binary (rs->buf, i + buf_len) < 0
9881 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
9882 || packet_ok (rs->buf, packet) != PACKET_OK)
9883 return TARGET_XFER_E_IO;
9885 unpack_varlen_hex (rs->buf, &n);
9888 return TARGET_XFER_OK;
9891 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
9892 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
9893 number of bytes read is returned, or 0 for EOF, or -1 for error.
9894 The number of bytes read may be less than LEN without indicating an
9895 EOF. PACKET is checked and updated to indicate whether the remote
9896 target supports this object. */
9898 static enum target_xfer_status
9899 remote_read_qxfer (struct target_ops *ops, const char *object_name,
9901 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
9902 ULONGEST *xfered_len,
9903 struct packet_config *packet)
9905 struct remote_state *rs = get_remote_state ();
9906 LONGEST i, n, packet_len;
9908 if (packet->support == PACKET_DISABLE)
9909 return TARGET_XFER_E_IO;
9911 /* Check whether we've cached an end-of-object packet that matches
9913 if (rs->finished_object)
9915 if (strcmp (object_name, rs->finished_object) == 0
9916 && strcmp (annex ? annex : "", rs->finished_annex) == 0
9917 && offset == rs->finished_offset)
9918 return TARGET_XFER_EOF;
9921 /* Otherwise, we're now reading something different. Discard
9923 xfree (rs->finished_object);
9924 xfree (rs->finished_annex);
9925 rs->finished_object = NULL;
9926 rs->finished_annex = NULL;
9929 /* Request only enough to fit in a single packet. The actual data
9930 may not, since we don't know how much of it will need to be escaped;
9931 the target is free to respond with slightly less data. We subtract
9932 five to account for the response type and the protocol frame. */
9933 n = min (get_remote_packet_size () - 5, len);
9934 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
9935 object_name, annex ? annex : "",
9936 phex_nz (offset, sizeof offset),
9937 phex_nz (n, sizeof n));
9938 i = putpkt (rs->buf);
9940 return TARGET_XFER_E_IO;
9943 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
9944 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
9945 return TARGET_XFER_E_IO;
9947 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
9948 error (_("Unknown remote qXfer reply: %s"), rs->buf);
9950 /* 'm' means there is (or at least might be) more data after this
9951 batch. That does not make sense unless there's at least one byte
9952 of data in this reply. */
9953 if (rs->buf[0] == 'm' && packet_len == 1)
9954 error (_("Remote qXfer reply contained no data."));
9956 /* Got some data. */
9957 i = remote_unescape_input ((gdb_byte *) rs->buf + 1,
9958 packet_len - 1, readbuf, n);
9960 /* 'l' is an EOF marker, possibly including a final block of data,
9961 or possibly empty. If we have the final block of a non-empty
9962 object, record this fact to bypass a subsequent partial read. */
9963 if (rs->buf[0] == 'l' && offset + i > 0)
9965 rs->finished_object = xstrdup (object_name);
9966 rs->finished_annex = xstrdup (annex ? annex : "");
9967 rs->finished_offset = offset + i;
9971 return TARGET_XFER_EOF;
9975 return TARGET_XFER_OK;
9979 static enum target_xfer_status
9980 remote_xfer_partial (struct target_ops *ops, enum target_object object,
9981 const char *annex, gdb_byte *readbuf,
9982 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
9983 ULONGEST *xfered_len)
9985 struct remote_state *rs;
9989 int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
9991 set_remote_traceframe ();
9992 set_general_thread (inferior_ptid);
9994 rs = get_remote_state ();
9996 /* Handle memory using the standard memory routines. */
9997 if (object == TARGET_OBJECT_MEMORY)
9999 /* If the remote target is connected but not running, we should
10000 pass this request down to a lower stratum (e.g. the executable
10002 if (!target_has_execution)
10003 return TARGET_XFER_EOF;
10005 if (writebuf != NULL)
10006 return remote_write_bytes (offset, writebuf, len, unit_size,
10009 return remote_read_bytes (ops, offset, readbuf, len, unit_size,
10013 /* Handle SPU memory using qxfer packets. */
10014 if (object == TARGET_OBJECT_SPU)
10017 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
10018 xfered_len, &remote_protocol_packets
10019 [PACKET_qXfer_spu_read]);
10021 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
10022 xfered_len, &remote_protocol_packets
10023 [PACKET_qXfer_spu_write]);
10026 /* Handle extra signal info using qxfer packets. */
10027 if (object == TARGET_OBJECT_SIGNAL_INFO)
10030 return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len,
10031 xfered_len, &remote_protocol_packets
10032 [PACKET_qXfer_siginfo_read]);
10034 return remote_write_qxfer (ops, "siginfo", annex,
10035 writebuf, offset, len, xfered_len,
10036 &remote_protocol_packets
10037 [PACKET_qXfer_siginfo_write]);
10040 if (object == TARGET_OBJECT_STATIC_TRACE_DATA)
10043 return remote_read_qxfer (ops, "statictrace", annex,
10044 readbuf, offset, len, xfered_len,
10045 &remote_protocol_packets
10046 [PACKET_qXfer_statictrace_read]);
10048 return TARGET_XFER_E_IO;
10051 /* Only handle flash writes. */
10052 if (writebuf != NULL)
10058 case TARGET_OBJECT_FLASH:
10059 return remote_flash_write (ops, offset, len, xfered_len,
10063 return TARGET_XFER_E_IO;
10067 /* Map pre-existing objects onto letters. DO NOT do this for new
10068 objects!!! Instead specify new query packets. */
10071 case TARGET_OBJECT_AVR:
10075 case TARGET_OBJECT_AUXV:
10076 gdb_assert (annex == NULL);
10077 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
10079 &remote_protocol_packets[PACKET_qXfer_auxv]);
10081 case TARGET_OBJECT_AVAILABLE_FEATURES:
10082 return remote_read_qxfer
10083 (ops, "features", annex, readbuf, offset, len, xfered_len,
10084 &remote_protocol_packets[PACKET_qXfer_features]);
10086 case TARGET_OBJECT_LIBRARIES:
10087 return remote_read_qxfer
10088 (ops, "libraries", annex, readbuf, offset, len, xfered_len,
10089 &remote_protocol_packets[PACKET_qXfer_libraries]);
10091 case TARGET_OBJECT_LIBRARIES_SVR4:
10092 return remote_read_qxfer
10093 (ops, "libraries-svr4", annex, readbuf, offset, len, xfered_len,
10094 &remote_protocol_packets[PACKET_qXfer_libraries_svr4]);
10096 case TARGET_OBJECT_MEMORY_MAP:
10097 gdb_assert (annex == NULL);
10098 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
10100 &remote_protocol_packets[PACKET_qXfer_memory_map]);
10102 case TARGET_OBJECT_OSDATA:
10103 /* Should only get here if we're connected. */
10104 gdb_assert (rs->remote_desc);
10105 return remote_read_qxfer
10106 (ops, "osdata", annex, readbuf, offset, len, xfered_len,
10107 &remote_protocol_packets[PACKET_qXfer_osdata]);
10109 case TARGET_OBJECT_THREADS:
10110 gdb_assert (annex == NULL);
10111 return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len,
10113 &remote_protocol_packets[PACKET_qXfer_threads]);
10115 case TARGET_OBJECT_TRACEFRAME_INFO:
10116 gdb_assert (annex == NULL);
10117 return remote_read_qxfer
10118 (ops, "traceframe-info", annex, readbuf, offset, len, xfered_len,
10119 &remote_protocol_packets[PACKET_qXfer_traceframe_info]);
10121 case TARGET_OBJECT_FDPIC:
10122 return remote_read_qxfer (ops, "fdpic", annex, readbuf, offset, len,
10124 &remote_protocol_packets[PACKET_qXfer_fdpic]);
10126 case TARGET_OBJECT_OPENVMS_UIB:
10127 return remote_read_qxfer (ops, "uib", annex, readbuf, offset, len,
10129 &remote_protocol_packets[PACKET_qXfer_uib]);
10131 case TARGET_OBJECT_BTRACE:
10132 return remote_read_qxfer (ops, "btrace", annex, readbuf, offset, len,
10134 &remote_protocol_packets[PACKET_qXfer_btrace]);
10136 case TARGET_OBJECT_BTRACE_CONF:
10137 return remote_read_qxfer (ops, "btrace-conf", annex, readbuf, offset,
10139 &remote_protocol_packets[PACKET_qXfer_btrace_conf]);
10141 case TARGET_OBJECT_EXEC_FILE:
10142 return remote_read_qxfer (ops, "exec-file", annex, readbuf, offset,
10144 &remote_protocol_packets[PACKET_qXfer_exec_file]);
10147 return TARGET_XFER_E_IO;
10150 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10151 large enough let the caller deal with it. */
10152 if (len < get_remote_packet_size ())
10153 return TARGET_XFER_E_IO;
10154 len = get_remote_packet_size ();
10156 /* Except for querying the minimum buffer size, target must be open. */
10157 if (!rs->remote_desc)
10158 error (_("remote query is only available after target open"));
10160 gdb_assert (annex != NULL);
10161 gdb_assert (readbuf != NULL);
10165 *p2++ = query_type;
10167 /* We used one buffer char for the remote protocol q command and
10168 another for the query type. As the remote protocol encapsulation
10169 uses 4 chars plus one extra in case we are debugging
10170 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10173 while (annex[i] && (i < (get_remote_packet_size () - 8)))
10175 /* Bad caller may have sent forbidden characters. */
10176 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
10181 gdb_assert (annex[i] == '\0');
10183 i = putpkt (rs->buf);
10185 return TARGET_XFER_E_IO;
10187 getpkt (&rs->buf, &rs->buf_size, 0);
10188 strcpy ((char *) readbuf, rs->buf);
10190 *xfered_len = strlen ((char *) readbuf);
10191 return TARGET_XFER_OK;
10195 remote_search_memory (struct target_ops* ops,
10196 CORE_ADDR start_addr, ULONGEST search_space_len,
10197 const gdb_byte *pattern, ULONGEST pattern_len,
10198 CORE_ADDR *found_addrp)
10200 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
10201 struct remote_state *rs = get_remote_state ();
10202 int max_size = get_memory_write_packet_size ();
10203 struct packet_config *packet =
10204 &remote_protocol_packets[PACKET_qSearch_memory];
10205 /* Number of packet bytes used to encode the pattern;
10206 this could be more than PATTERN_LEN due to escape characters. */
10207 int escaped_pattern_len;
10208 /* Amount of pattern that was encodable in the packet. */
10209 int used_pattern_len;
10212 ULONGEST found_addr;
10214 /* Don't go to the target if we don't have to.
10215 This is done before checking packet->support to avoid the possibility that
10216 a success for this edge case means the facility works in general. */
10217 if (pattern_len > search_space_len)
10219 if (pattern_len == 0)
10221 *found_addrp = start_addr;
10225 /* If we already know the packet isn't supported, fall back to the simple
10226 way of searching memory. */
10228 if (packet_config_support (packet) == PACKET_DISABLE)
10230 /* Target doesn't provided special support, fall back and use the
10231 standard support (copy memory and do the search here). */
10232 return simple_search_memory (ops, start_addr, search_space_len,
10233 pattern, pattern_len, found_addrp);
10236 /* Make sure the remote is pointing at the right process. */
10237 set_general_process ();
10239 /* Insert header. */
10240 i = snprintf (rs->buf, max_size,
10241 "qSearch:memory:%s;%s;",
10242 phex_nz (start_addr, addr_size),
10243 phex_nz (search_space_len, sizeof (search_space_len)));
10244 max_size -= (i + 1);
10246 /* Escape as much data as fits into rs->buf. */
10247 escaped_pattern_len =
10248 remote_escape_output (pattern, pattern_len, 1, (gdb_byte *) rs->buf + i,
10249 &used_pattern_len, max_size);
10251 /* Bail if the pattern is too large. */
10252 if (used_pattern_len != pattern_len)
10253 error (_("Pattern is too large to transmit to remote target."));
10255 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
10256 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
10257 || packet_ok (rs->buf, packet) != PACKET_OK)
10259 /* The request may not have worked because the command is not
10260 supported. If so, fall back to the simple way. */
10261 if (packet->support == PACKET_DISABLE)
10263 return simple_search_memory (ops, start_addr, search_space_len,
10264 pattern, pattern_len, found_addrp);
10269 if (rs->buf[0] == '0')
10271 else if (rs->buf[0] == '1')
10274 if (rs->buf[1] != ',')
10275 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
10276 unpack_varlen_hex (rs->buf + 2, &found_addr);
10277 *found_addrp = found_addr;
10280 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
10286 remote_rcmd (struct target_ops *self, const char *command,
10287 struct ui_file *outbuf)
10289 struct remote_state *rs = get_remote_state ();
10292 if (!rs->remote_desc)
10293 error (_("remote rcmd is only available after target open"));
10295 /* Send a NULL command across as an empty command. */
10296 if (command == NULL)
10299 /* The query prefix. */
10300 strcpy (rs->buf, "qRcmd,");
10301 p = strchr (rs->buf, '\0');
10303 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/)
10304 > get_remote_packet_size ())
10305 error (_("\"monitor\" command ``%s'' is too long."), command);
10307 /* Encode the actual command. */
10308 bin2hex ((const gdb_byte *) command, p, strlen (command));
10310 if (putpkt (rs->buf) < 0)
10311 error (_("Communication problem with target."));
10313 /* get/display the response */
10318 /* XXX - see also remote_get_noisy_reply(). */
10319 QUIT; /* Allow user to bail out with ^C. */
10321 if (getpkt_sane (&rs->buf, &rs->buf_size, 0) == -1)
10323 /* Timeout. Continue to (try to) read responses.
10324 This is better than stopping with an error, assuming the stub
10325 is still executing the (long) monitor command.
10326 If needed, the user can interrupt gdb using C-c, obtaining
10327 an effect similar to stop on timeout. */
10331 if (buf[0] == '\0')
10332 error (_("Target does not support this command."));
10333 if (buf[0] == 'O' && buf[1] != 'K')
10335 remote_console_output (buf + 1); /* 'O' message from stub. */
10338 if (strcmp (buf, "OK") == 0)
10340 if (strlen (buf) == 3 && buf[0] == 'E'
10341 && isdigit (buf[1]) && isdigit (buf[2]))
10343 error (_("Protocol error with Rcmd"));
10345 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
10347 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
10349 fputc_unfiltered (c, outbuf);
10355 static VEC(mem_region_s) *
10356 remote_memory_map (struct target_ops *ops)
10358 VEC(mem_region_s) *result = NULL;
10359 char *text = target_read_stralloc (¤t_target,
10360 TARGET_OBJECT_MEMORY_MAP, NULL);
10364 struct cleanup *back_to = make_cleanup (xfree, text);
10366 result = parse_memory_map (text);
10367 do_cleanups (back_to);
10374 packet_command (char *args, int from_tty)
10376 struct remote_state *rs = get_remote_state ();
10378 if (!rs->remote_desc)
10379 error (_("command can only be used with remote target"));
10382 error (_("remote-packet command requires packet text as argument"));
10384 puts_filtered ("sending: ");
10385 print_packet (args);
10386 puts_filtered ("\n");
10389 getpkt (&rs->buf, &rs->buf_size, 0);
10390 puts_filtered ("received: ");
10391 print_packet (rs->buf);
10392 puts_filtered ("\n");
10396 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10398 static void display_thread_info (struct gdb_ext_thread_info *info);
10400 static void threadset_test_cmd (char *cmd, int tty);
10402 static void threadalive_test (char *cmd, int tty);
10404 static void threadlist_test_cmd (char *cmd, int tty);
10406 int get_and_display_threadinfo (threadref *ref);
10408 static void threadinfo_test_cmd (char *cmd, int tty);
10410 static int thread_display_step (threadref *ref, void *context);
10412 static void threadlist_update_test_cmd (char *cmd, int tty);
10414 static void init_remote_threadtests (void);
10416 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10419 threadset_test_cmd (char *cmd, int tty)
10421 int sample_thread = SAMPLE_THREAD;
10423 printf_filtered (_("Remote threadset test\n"));
10424 set_general_thread (sample_thread);
10429 threadalive_test (char *cmd, int tty)
10431 int sample_thread = SAMPLE_THREAD;
10432 int pid = ptid_get_pid (inferior_ptid);
10433 ptid_t ptid = ptid_build (pid, sample_thread, 0);
10435 if (remote_thread_alive (ptid))
10436 printf_filtered ("PASS: Thread alive test\n");
10438 printf_filtered ("FAIL: Thread alive test\n");
10441 void output_threadid (char *title, threadref *ref);
10444 output_threadid (char *title, threadref *ref)
10448 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
10450 printf_filtered ("%s %s\n", title, (&hexid[0]));
10454 threadlist_test_cmd (char *cmd, int tty)
10457 threadref nextthread;
10458 int done, result_count;
10459 threadref threadlist[3];
10461 printf_filtered ("Remote Threadlist test\n");
10462 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
10463 &result_count, &threadlist[0]))
10464 printf_filtered ("FAIL: threadlist test\n");
10467 threadref *scan = threadlist;
10468 threadref *limit = scan + result_count;
10470 while (scan < limit)
10471 output_threadid (" thread ", scan++);
10476 display_thread_info (struct gdb_ext_thread_info *info)
10478 output_threadid ("Threadid: ", &info->threadid);
10479 printf_filtered ("Name: %s\n ", info->shortname);
10480 printf_filtered ("State: %s\n", info->display);
10481 printf_filtered ("other: %s\n\n", info->more_display);
10485 get_and_display_threadinfo (threadref *ref)
10489 struct gdb_ext_thread_info threadinfo;
10491 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
10492 | TAG_MOREDISPLAY | TAG_DISPLAY;
10493 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
10494 display_thread_info (&threadinfo);
10499 threadinfo_test_cmd (char *cmd, int tty)
10501 int athread = SAMPLE_THREAD;
10505 int_to_threadref (&thread, athread);
10506 printf_filtered ("Remote Threadinfo test\n");
10507 if (!get_and_display_threadinfo (&thread))
10508 printf_filtered ("FAIL cannot get thread info\n");
10512 thread_display_step (threadref *ref, void *context)
10514 /* output_threadid(" threadstep ",ref); *//* simple test */
10515 return get_and_display_threadinfo (ref);
10519 threadlist_update_test_cmd (char *cmd, int tty)
10521 printf_filtered ("Remote Threadlist update test\n");
10522 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
10526 init_remote_threadtests (void)
10528 add_com ("tlist", class_obscure, threadlist_test_cmd,
10529 _("Fetch and print the remote list of "
10530 "thread identifiers, one pkt only"));
10531 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
10532 _("Fetch and display info about one thread"));
10533 add_com ("tset", class_obscure, threadset_test_cmd,
10534 _("Test setting to a different thread"));
10535 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
10536 _("Iterate through updating all remote thread info"));
10537 add_com ("talive", class_obscure, threadalive_test,
10538 _(" Remote thread alive test "));
10543 /* Convert a thread ID to a string. Returns the string in a static
10547 remote_pid_to_str (struct target_ops *ops, ptid_t ptid)
10549 static char buf[64];
10550 struct remote_state *rs = get_remote_state ();
10552 if (ptid_equal (ptid, null_ptid))
10553 return normal_pid_to_str (ptid);
10554 else if (ptid_is_pid (ptid))
10556 /* Printing an inferior target id. */
10558 /* When multi-process extensions are off, there's no way in the
10559 remote protocol to know the remote process id, if there's any
10560 at all. There's one exception --- when we're connected with
10561 target extended-remote, and we manually attached to a process
10562 with "attach PID". We don't record anywhere a flag that
10563 allows us to distinguish that case from the case of
10564 connecting with extended-remote and the stub already being
10565 attached to a process, and reporting yes to qAttached, hence
10566 no smart special casing here. */
10567 if (!remote_multi_process_p (rs))
10569 xsnprintf (buf, sizeof buf, "Remote target");
10573 return normal_pid_to_str (ptid);
10577 if (ptid_equal (magic_null_ptid, ptid))
10578 xsnprintf (buf, sizeof buf, "Thread <main>");
10579 else if (remote_multi_process_p (rs))
10580 if (ptid_get_lwp (ptid) == 0)
10581 return normal_pid_to_str (ptid);
10583 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
10584 ptid_get_pid (ptid), ptid_get_lwp (ptid));
10586 xsnprintf (buf, sizeof buf, "Thread %ld",
10587 ptid_get_lwp (ptid));
10592 /* Get the address of the thread local variable in OBJFILE which is
10593 stored at OFFSET within the thread local storage for thread PTID. */
10596 remote_get_thread_local_address (struct target_ops *ops,
10597 ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
10599 if (packet_support (PACKET_qGetTLSAddr) != PACKET_DISABLE)
10601 struct remote_state *rs = get_remote_state ();
10603 char *endp = rs->buf + get_remote_packet_size ();
10604 enum packet_result result;
10606 strcpy (p, "qGetTLSAddr:");
10608 p = write_ptid (p, endp, ptid);
10610 p += hexnumstr (p, offset);
10612 p += hexnumstr (p, lm);
10616 getpkt (&rs->buf, &rs->buf_size, 0);
10617 result = packet_ok (rs->buf,
10618 &remote_protocol_packets[PACKET_qGetTLSAddr]);
10619 if (result == PACKET_OK)
10623 unpack_varlen_hex (rs->buf, &result);
10626 else if (result == PACKET_UNKNOWN)
10627 throw_error (TLS_GENERIC_ERROR,
10628 _("Remote target doesn't support qGetTLSAddr packet"));
10630 throw_error (TLS_GENERIC_ERROR,
10631 _("Remote target failed to process qGetTLSAddr request"));
10634 throw_error (TLS_GENERIC_ERROR,
10635 _("TLS not supported or disabled on this target"));
10640 /* Provide thread local base, i.e. Thread Information Block address.
10641 Returns 1 if ptid is found and thread_local_base is non zero. */
10644 remote_get_tib_address (struct target_ops *self, ptid_t ptid, CORE_ADDR *addr)
10646 if (packet_support (PACKET_qGetTIBAddr) != PACKET_DISABLE)
10648 struct remote_state *rs = get_remote_state ();
10650 char *endp = rs->buf + get_remote_packet_size ();
10651 enum packet_result result;
10653 strcpy (p, "qGetTIBAddr:");
10655 p = write_ptid (p, endp, ptid);
10659 getpkt (&rs->buf, &rs->buf_size, 0);
10660 result = packet_ok (rs->buf,
10661 &remote_protocol_packets[PACKET_qGetTIBAddr]);
10662 if (result == PACKET_OK)
10666 unpack_varlen_hex (rs->buf, &result);
10668 *addr = (CORE_ADDR) result;
10671 else if (result == PACKET_UNKNOWN)
10672 error (_("Remote target doesn't support qGetTIBAddr packet"));
10674 error (_("Remote target failed to process qGetTIBAddr request"));
10677 error (_("qGetTIBAddr not supported or disabled on this target"));
10682 /* Support for inferring a target description based on the current
10683 architecture and the size of a 'g' packet. While the 'g' packet
10684 can have any size (since optional registers can be left off the
10685 end), some sizes are easily recognizable given knowledge of the
10686 approximate architecture. */
10688 struct remote_g_packet_guess
10691 const struct target_desc *tdesc;
10693 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
10694 DEF_VEC_O(remote_g_packet_guess_s);
10696 struct remote_g_packet_data
10698 VEC(remote_g_packet_guess_s) *guesses;
10701 static struct gdbarch_data *remote_g_packet_data_handle;
10704 remote_g_packet_data_init (struct obstack *obstack)
10706 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
10710 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
10711 const struct target_desc *tdesc)
10713 struct remote_g_packet_data *data
10714 = ((struct remote_g_packet_data *)
10715 gdbarch_data (gdbarch, remote_g_packet_data_handle));
10716 struct remote_g_packet_guess new_guess, *guess;
10719 gdb_assert (tdesc != NULL);
10722 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
10724 if (guess->bytes == bytes)
10725 internal_error (__FILE__, __LINE__,
10726 _("Duplicate g packet description added for size %d"),
10729 new_guess.bytes = bytes;
10730 new_guess.tdesc = tdesc;
10731 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
10734 /* Return 1 if remote_read_description would do anything on this target
10735 and architecture, 0 otherwise. */
10738 remote_read_description_p (struct target_ops *target)
10740 struct remote_g_packet_data *data
10741 = ((struct remote_g_packet_data *)
10742 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
10744 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
10750 static const struct target_desc *
10751 remote_read_description (struct target_ops *target)
10753 struct remote_g_packet_data *data
10754 = ((struct remote_g_packet_data *)
10755 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
10757 /* Do not try this during initial connection, when we do not know
10758 whether there is a running but stopped thread. */
10759 if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
10760 return target->beneath->to_read_description (target->beneath);
10762 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
10764 struct remote_g_packet_guess *guess;
10766 int bytes = send_g_packet ();
10769 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
10771 if (guess->bytes == bytes)
10772 return guess->tdesc;
10774 /* We discard the g packet. A minor optimization would be to
10775 hold on to it, and fill the register cache once we have selected
10776 an architecture, but it's too tricky to do safely. */
10779 return target->beneath->to_read_description (target->beneath);
10782 /* Remote file transfer support. This is host-initiated I/O, not
10783 target-initiated; for target-initiated, see remote-fileio.c. */
10785 /* If *LEFT is at least the length of STRING, copy STRING to
10786 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10787 decrease *LEFT. Otherwise raise an error. */
10790 remote_buffer_add_string (char **buffer, int *left, char *string)
10792 int len = strlen (string);
10795 error (_("Packet too long for target."));
10797 memcpy (*buffer, string, len);
10801 /* NUL-terminate the buffer as a convenience, if there is
10807 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
10808 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10809 decrease *LEFT. Otherwise raise an error. */
10812 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
10815 if (2 * len > *left)
10816 error (_("Packet too long for target."));
10818 bin2hex (bytes, *buffer, len);
10819 *buffer += 2 * len;
10822 /* NUL-terminate the buffer as a convenience, if there is
10828 /* If *LEFT is large enough, convert VALUE to hex and add it to
10829 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10830 decrease *LEFT. Otherwise raise an error. */
10833 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
10835 int len = hexnumlen (value);
10838 error (_("Packet too long for target."));
10840 hexnumstr (*buffer, value);
10844 /* NUL-terminate the buffer as a convenience, if there is
10850 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
10851 value, *REMOTE_ERRNO to the remote error number or zero if none
10852 was included, and *ATTACHMENT to point to the start of the annex
10853 if any. The length of the packet isn't needed here; there may
10854 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
10856 Return 0 if the packet could be parsed, -1 if it could not. If
10857 -1 is returned, the other variables may not be initialized. */
10860 remote_hostio_parse_result (char *buffer, int *retcode,
10861 int *remote_errno, char **attachment)
10866 *attachment = NULL;
10868 if (buffer[0] != 'F')
10872 *retcode = strtol (&buffer[1], &p, 16);
10873 if (errno != 0 || p == &buffer[1])
10876 /* Check for ",errno". */
10880 *remote_errno = strtol (p + 1, &p2, 16);
10881 if (errno != 0 || p + 1 == p2)
10886 /* Check for ";attachment". If there is no attachment, the
10887 packet should end here. */
10890 *attachment = p + 1;
10893 else if (*p == '\0')
10899 /* Send a prepared I/O packet to the target and read its response.
10900 The prepared packet is in the global RS->BUF before this function
10901 is called, and the answer is there when we return.
10903 COMMAND_BYTES is the length of the request to send, which may include
10904 binary data. WHICH_PACKET is the packet configuration to check
10905 before attempting a packet. If an error occurs, *REMOTE_ERRNO
10906 is set to the error number and -1 is returned. Otherwise the value
10907 returned by the function is returned.
10909 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
10910 attachment is expected; an error will be reported if there's a
10911 mismatch. If one is found, *ATTACHMENT will be set to point into
10912 the packet buffer and *ATTACHMENT_LEN will be set to the
10913 attachment's length. */
10916 remote_hostio_send_command (int command_bytes, int which_packet,
10917 int *remote_errno, char **attachment,
10918 int *attachment_len)
10920 struct remote_state *rs = get_remote_state ();
10921 int ret, bytes_read;
10922 char *attachment_tmp;
10924 if (!rs->remote_desc
10925 || packet_support (which_packet) == PACKET_DISABLE)
10927 *remote_errno = FILEIO_ENOSYS;
10931 putpkt_binary (rs->buf, command_bytes);
10932 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
10934 /* If it timed out, something is wrong. Don't try to parse the
10936 if (bytes_read < 0)
10938 *remote_errno = FILEIO_EINVAL;
10942 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
10945 *remote_errno = FILEIO_EINVAL;
10947 case PACKET_UNKNOWN:
10948 *remote_errno = FILEIO_ENOSYS;
10954 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
10957 *remote_errno = FILEIO_EINVAL;
10961 /* Make sure we saw an attachment if and only if we expected one. */
10962 if ((attachment_tmp == NULL && attachment != NULL)
10963 || (attachment_tmp != NULL && attachment == NULL))
10965 *remote_errno = FILEIO_EINVAL;
10969 /* If an attachment was found, it must point into the packet buffer;
10970 work out how many bytes there were. */
10971 if (attachment_tmp != NULL)
10973 *attachment = attachment_tmp;
10974 *attachment_len = bytes_read - (*attachment - rs->buf);
10980 /* Invalidate the readahead cache. */
10983 readahead_cache_invalidate (void)
10985 struct remote_state *rs = get_remote_state ();
10987 rs->readahead_cache.fd = -1;
10990 /* Invalidate the readahead cache if it is holding data for FD. */
10993 readahead_cache_invalidate_fd (int fd)
10995 struct remote_state *rs = get_remote_state ();
10997 if (rs->readahead_cache.fd == fd)
10998 rs->readahead_cache.fd = -1;
11001 /* Set the filesystem remote_hostio functions that take FILENAME
11002 arguments will use. Return 0 on success, or -1 if an error
11003 occurs (and set *REMOTE_ERRNO). */
11006 remote_hostio_set_filesystem (struct inferior *inf, int *remote_errno)
11008 struct remote_state *rs = get_remote_state ();
11009 int required_pid = (inf == NULL || inf->fake_pid_p) ? 0 : inf->pid;
11011 int left = get_remote_packet_size () - 1;
11015 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
11018 if (rs->fs_pid != -1 && required_pid == rs->fs_pid)
11021 remote_buffer_add_string (&p, &left, "vFile:setfs:");
11023 xsnprintf (arg, sizeof (arg), "%x", required_pid);
11024 remote_buffer_add_string (&p, &left, arg);
11026 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_setfs,
11027 remote_errno, NULL, NULL);
11029 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
11033 rs->fs_pid = required_pid;
11038 /* Implementation of to_fileio_open. */
11041 remote_hostio_open (struct target_ops *self,
11042 struct inferior *inf, const char *filename,
11043 int flags, int mode, int warn_if_slow,
11046 struct remote_state *rs = get_remote_state ();
11048 int left = get_remote_packet_size () - 1;
11052 static int warning_issued = 0;
11054 printf_unfiltered (_("Reading %s from remote target...\n"),
11057 if (!warning_issued)
11059 warning (_("File transfers from remote targets can be slow."
11060 " Use \"set sysroot\" to access files locally"
11062 warning_issued = 1;
11066 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11069 remote_buffer_add_string (&p, &left, "vFile:open:");
11071 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11072 strlen (filename));
11073 remote_buffer_add_string (&p, &left, ",");
11075 remote_buffer_add_int (&p, &left, flags);
11076 remote_buffer_add_string (&p, &left, ",");
11078 remote_buffer_add_int (&p, &left, mode);
11080 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
11081 remote_errno, NULL, NULL);
11084 /* Implementation of to_fileio_pwrite. */
11087 remote_hostio_pwrite (struct target_ops *self,
11088 int fd, const gdb_byte *write_buf, int len,
11089 ULONGEST offset, int *remote_errno)
11091 struct remote_state *rs = get_remote_state ();
11093 int left = get_remote_packet_size ();
11096 readahead_cache_invalidate_fd (fd);
11098 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
11100 remote_buffer_add_int (&p, &left, fd);
11101 remote_buffer_add_string (&p, &left, ",");
11103 remote_buffer_add_int (&p, &left, offset);
11104 remote_buffer_add_string (&p, &left, ",");
11106 p += remote_escape_output (write_buf, len, 1, (gdb_byte *) p, &out_len,
11107 get_remote_packet_size () - (p - rs->buf));
11109 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
11110 remote_errno, NULL, NULL);
11113 /* Helper for the implementation of to_fileio_pread. Read the file
11114 from the remote side with vFile:pread. */
11117 remote_hostio_pread_vFile (struct target_ops *self,
11118 int fd, gdb_byte *read_buf, int len,
11119 ULONGEST offset, int *remote_errno)
11121 struct remote_state *rs = get_remote_state ();
11124 int left = get_remote_packet_size ();
11125 int ret, attachment_len;
11128 remote_buffer_add_string (&p, &left, "vFile:pread:");
11130 remote_buffer_add_int (&p, &left, fd);
11131 remote_buffer_add_string (&p, &left, ",");
11133 remote_buffer_add_int (&p, &left, len);
11134 remote_buffer_add_string (&p, &left, ",");
11136 remote_buffer_add_int (&p, &left, offset);
11138 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
11139 remote_errno, &attachment,
11145 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11147 if (read_len != ret)
11148 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
11153 /* Serve pread from the readahead cache. Returns number of bytes
11154 read, or 0 if the request can't be served from the cache. */
11157 remote_hostio_pread_from_cache (struct remote_state *rs,
11158 int fd, gdb_byte *read_buf, size_t len,
11161 struct readahead_cache *cache = &rs->readahead_cache;
11163 if (cache->fd == fd
11164 && cache->offset <= offset
11165 && offset < cache->offset + cache->bufsize)
11167 ULONGEST max = cache->offset + cache->bufsize;
11169 if (offset + len > max)
11170 len = max - offset;
11172 memcpy (read_buf, cache->buf + offset - cache->offset, len);
11179 /* Implementation of to_fileio_pread. */
11182 remote_hostio_pread (struct target_ops *self,
11183 int fd, gdb_byte *read_buf, int len,
11184 ULONGEST offset, int *remote_errno)
11187 struct remote_state *rs = get_remote_state ();
11188 struct readahead_cache *cache = &rs->readahead_cache;
11190 ret = remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset);
11193 cache->hit_count++;
11196 fprintf_unfiltered (gdb_stdlog, "readahead cache hit %s\n",
11197 pulongest (cache->hit_count));
11201 cache->miss_count++;
11203 fprintf_unfiltered (gdb_stdlog, "readahead cache miss %s\n",
11204 pulongest (cache->miss_count));
11207 cache->offset = offset;
11208 cache->bufsize = get_remote_packet_size ();
11209 cache->buf = (gdb_byte *) xrealloc (cache->buf, cache->bufsize);
11211 ret = remote_hostio_pread_vFile (self, cache->fd, cache->buf, cache->bufsize,
11212 cache->offset, remote_errno);
11215 readahead_cache_invalidate_fd (fd);
11219 cache->bufsize = ret;
11220 return remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset);
11223 /* Implementation of to_fileio_close. */
11226 remote_hostio_close (struct target_ops *self, int fd, int *remote_errno)
11228 struct remote_state *rs = get_remote_state ();
11230 int left = get_remote_packet_size () - 1;
11232 readahead_cache_invalidate_fd (fd);
11234 remote_buffer_add_string (&p, &left, "vFile:close:");
11236 remote_buffer_add_int (&p, &left, fd);
11238 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
11239 remote_errno, NULL, NULL);
11242 /* Implementation of to_fileio_unlink. */
11245 remote_hostio_unlink (struct target_ops *self,
11246 struct inferior *inf, const char *filename,
11249 struct remote_state *rs = get_remote_state ();
11251 int left = get_remote_packet_size () - 1;
11253 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11256 remote_buffer_add_string (&p, &left, "vFile:unlink:");
11258 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11259 strlen (filename));
11261 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
11262 remote_errno, NULL, NULL);
11265 /* Implementation of to_fileio_readlink. */
11268 remote_hostio_readlink (struct target_ops *self,
11269 struct inferior *inf, const char *filename,
11272 struct remote_state *rs = get_remote_state ();
11275 int left = get_remote_packet_size ();
11276 int len, attachment_len;
11280 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11283 remote_buffer_add_string (&p, &left, "vFile:readlink:");
11285 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11286 strlen (filename));
11288 len = remote_hostio_send_command (p - rs->buf, PACKET_vFile_readlink,
11289 remote_errno, &attachment,
11295 ret = (char *) xmalloc (len + 1);
11297 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11298 (gdb_byte *) ret, len);
11299 if (read_len != len)
11300 error (_("Readlink returned %d, but %d bytes."), len, read_len);
11306 /* Implementation of to_fileio_fstat. */
11309 remote_hostio_fstat (struct target_ops *self,
11310 int fd, struct stat *st,
11313 struct remote_state *rs = get_remote_state ();
11315 int left = get_remote_packet_size ();
11316 int attachment_len, ret;
11318 struct fio_stat fst;
11321 remote_buffer_add_string (&p, &left, "vFile:fstat:");
11323 remote_buffer_add_int (&p, &left, fd);
11325 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_fstat,
11326 remote_errno, &attachment,
11330 if (*remote_errno != FILEIO_ENOSYS)
11333 /* Strictly we should return -1, ENOSYS here, but when
11334 "set sysroot remote:" was implemented in August 2008
11335 BFD's need for a stat function was sidestepped with
11336 this hack. This was not remedied until March 2015
11337 so we retain the previous behavior to avoid breaking
11340 Note that the memset is a March 2015 addition; older
11341 GDBs set st_size *and nothing else* so the structure
11342 would have garbage in all other fields. This might
11343 break something but retaining the previous behavior
11344 here would be just too wrong. */
11346 memset (st, 0, sizeof (struct stat));
11347 st->st_size = INT_MAX;
11351 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11352 (gdb_byte *) &fst, sizeof (fst));
11354 if (read_len != ret)
11355 error (_("vFile:fstat returned %d, but %d bytes."), ret, read_len);
11357 if (read_len != sizeof (fst))
11358 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11359 read_len, (int) sizeof (fst));
11361 remote_fileio_to_host_stat (&fst, st);
11366 /* Implementation of to_filesystem_is_local. */
11369 remote_filesystem_is_local (struct target_ops *self)
11371 /* Valgrind GDB presents itself as a remote target but works
11372 on the local filesystem: it does not implement remote get
11373 and users are not expected to set a sysroot. To handle
11374 this case we treat the remote filesystem as local if the
11375 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11376 does not support vFile:open. */
11377 if (strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) == 0)
11379 enum packet_support ps = packet_support (PACKET_vFile_open);
11381 if (ps == PACKET_SUPPORT_UNKNOWN)
11383 int fd, remote_errno;
11385 /* Try opening a file to probe support. The supplied
11386 filename is irrelevant, we only care about whether
11387 the stub recognizes the packet or not. */
11388 fd = remote_hostio_open (self, NULL, "just probing",
11389 FILEIO_O_RDONLY, 0700, 0,
11393 remote_hostio_close (self, fd, &remote_errno);
11395 ps = packet_support (PACKET_vFile_open);
11398 if (ps == PACKET_DISABLE)
11400 static int warning_issued = 0;
11402 if (!warning_issued)
11404 warning (_("remote target does not support file"
11405 " transfer, attempting to access files"
11406 " from local filesystem."));
11407 warning_issued = 1;
11418 remote_fileio_errno_to_host (int errnum)
11424 case FILEIO_ENOENT:
11432 case FILEIO_EACCES:
11434 case FILEIO_EFAULT:
11438 case FILEIO_EEXIST:
11440 case FILEIO_ENODEV:
11442 case FILEIO_ENOTDIR:
11444 case FILEIO_EISDIR:
11446 case FILEIO_EINVAL:
11448 case FILEIO_ENFILE:
11450 case FILEIO_EMFILE:
11454 case FILEIO_ENOSPC:
11456 case FILEIO_ESPIPE:
11460 case FILEIO_ENOSYS:
11462 case FILEIO_ENAMETOOLONG:
11463 return ENAMETOOLONG;
11469 remote_hostio_error (int errnum)
11471 int host_error = remote_fileio_errno_to_host (errnum);
11473 if (host_error == -1)
11474 error (_("Unknown remote I/O error %d"), errnum);
11476 error (_("Remote I/O error: %s"), safe_strerror (host_error));
11480 remote_hostio_close_cleanup (void *opaque)
11482 int fd = *(int *) opaque;
11485 remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno);
11489 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
11491 struct cleanup *back_to, *close_cleanup;
11492 int retcode, fd, remote_errno, bytes, io_size;
11495 int bytes_in_buffer;
11498 struct remote_state *rs = get_remote_state ();
11500 if (!rs->remote_desc)
11501 error (_("command can only be used with remote target"));
11503 file = gdb_fopen_cloexec (local_file, "rb");
11505 perror_with_name (local_file);
11506 back_to = make_cleanup_fclose (file);
11508 fd = remote_hostio_open (find_target_at (process_stratum), NULL,
11509 remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
11511 0700, 0, &remote_errno);
11513 remote_hostio_error (remote_errno);
11515 /* Send up to this many bytes at once. They won't all fit in the
11516 remote packet limit, so we'll transfer slightly fewer. */
11517 io_size = get_remote_packet_size ();
11518 buffer = (gdb_byte *) xmalloc (io_size);
11519 make_cleanup (xfree, buffer);
11521 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
11523 bytes_in_buffer = 0;
11526 while (bytes_in_buffer || !saw_eof)
11530 bytes = fread (buffer + bytes_in_buffer, 1,
11531 io_size - bytes_in_buffer,
11536 error (_("Error reading %s."), local_file);
11539 /* EOF. Unless there is something still in the
11540 buffer from the last iteration, we are done. */
11542 if (bytes_in_buffer == 0)
11550 bytes += bytes_in_buffer;
11551 bytes_in_buffer = 0;
11553 retcode = remote_hostio_pwrite (find_target_at (process_stratum),
11555 offset, &remote_errno);
11558 remote_hostio_error (remote_errno);
11559 else if (retcode == 0)
11560 error (_("Remote write of %d bytes returned 0!"), bytes);
11561 else if (retcode < bytes)
11563 /* Short write. Save the rest of the read data for the next
11565 bytes_in_buffer = bytes - retcode;
11566 memmove (buffer, buffer + retcode, bytes_in_buffer);
11572 discard_cleanups (close_cleanup);
11573 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
11574 remote_hostio_error (remote_errno);
11577 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
11578 do_cleanups (back_to);
11582 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
11584 struct cleanup *back_to, *close_cleanup;
11585 int fd, remote_errno, bytes, io_size;
11589 struct remote_state *rs = get_remote_state ();
11591 if (!rs->remote_desc)
11592 error (_("command can only be used with remote target"));
11594 fd = remote_hostio_open (find_target_at (process_stratum), NULL,
11595 remote_file, FILEIO_O_RDONLY, 0, 0,
11598 remote_hostio_error (remote_errno);
11600 file = gdb_fopen_cloexec (local_file, "wb");
11602 perror_with_name (local_file);
11603 back_to = make_cleanup_fclose (file);
11605 /* Send up to this many bytes at once. They won't all fit in the
11606 remote packet limit, so we'll transfer slightly fewer. */
11607 io_size = get_remote_packet_size ();
11608 buffer = (gdb_byte *) xmalloc (io_size);
11609 make_cleanup (xfree, buffer);
11611 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
11616 bytes = remote_hostio_pread (find_target_at (process_stratum),
11617 fd, buffer, io_size, offset, &remote_errno);
11619 /* Success, but no bytes, means end-of-file. */
11622 remote_hostio_error (remote_errno);
11626 bytes = fwrite (buffer, 1, bytes, file);
11628 perror_with_name (local_file);
11631 discard_cleanups (close_cleanup);
11632 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
11633 remote_hostio_error (remote_errno);
11636 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
11637 do_cleanups (back_to);
11641 remote_file_delete (const char *remote_file, int from_tty)
11643 int retcode, remote_errno;
11644 struct remote_state *rs = get_remote_state ();
11646 if (!rs->remote_desc)
11647 error (_("command can only be used with remote target"));
11649 retcode = remote_hostio_unlink (find_target_at (process_stratum),
11650 NULL, remote_file, &remote_errno);
11652 remote_hostio_error (remote_errno);
11655 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
11659 remote_put_command (char *args, int from_tty)
11661 struct cleanup *back_to;
11665 error_no_arg (_("file to put"));
11667 argv = gdb_buildargv (args);
11668 back_to = make_cleanup_freeargv (argv);
11669 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
11670 error (_("Invalid parameters to remote put"));
11672 remote_file_put (argv[0], argv[1], from_tty);
11674 do_cleanups (back_to);
11678 remote_get_command (char *args, int from_tty)
11680 struct cleanup *back_to;
11684 error_no_arg (_("file to get"));
11686 argv = gdb_buildargv (args);
11687 back_to = make_cleanup_freeargv (argv);
11688 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
11689 error (_("Invalid parameters to remote get"));
11691 remote_file_get (argv[0], argv[1], from_tty);
11693 do_cleanups (back_to);
11697 remote_delete_command (char *args, int from_tty)
11699 struct cleanup *back_to;
11703 error_no_arg (_("file to delete"));
11705 argv = gdb_buildargv (args);
11706 back_to = make_cleanup_freeargv (argv);
11707 if (argv[0] == NULL || argv[1] != NULL)
11708 error (_("Invalid parameters to remote delete"));
11710 remote_file_delete (argv[0], from_tty);
11712 do_cleanups (back_to);
11716 remote_command (char *args, int from_tty)
11718 help_list (remote_cmdlist, "remote ", all_commands, gdb_stdout);
11722 remote_can_execute_reverse (struct target_ops *self)
11724 if (packet_support (PACKET_bs) == PACKET_ENABLE
11725 || packet_support (PACKET_bc) == PACKET_ENABLE)
11732 remote_supports_non_stop (struct target_ops *self)
11738 remote_supports_disable_randomization (struct target_ops *self)
11740 /* Only supported in extended mode. */
11745 remote_supports_multi_process (struct target_ops *self)
11747 struct remote_state *rs = get_remote_state ();
11749 return remote_multi_process_p (rs);
11753 remote_supports_cond_tracepoints (void)
11755 return packet_support (PACKET_ConditionalTracepoints) == PACKET_ENABLE;
11759 remote_supports_cond_breakpoints (struct target_ops *self)
11761 return packet_support (PACKET_ConditionalBreakpoints) == PACKET_ENABLE;
11765 remote_supports_fast_tracepoints (void)
11767 return packet_support (PACKET_FastTracepoints) == PACKET_ENABLE;
11771 remote_supports_static_tracepoints (void)
11773 return packet_support (PACKET_StaticTracepoints) == PACKET_ENABLE;
11777 remote_supports_install_in_trace (void)
11779 return packet_support (PACKET_InstallInTrace) == PACKET_ENABLE;
11783 remote_supports_enable_disable_tracepoint (struct target_ops *self)
11785 return (packet_support (PACKET_EnableDisableTracepoints_feature)
11790 remote_supports_string_tracing (struct target_ops *self)
11792 return packet_support (PACKET_tracenz_feature) == PACKET_ENABLE;
11796 remote_can_run_breakpoint_commands (struct target_ops *self)
11798 return packet_support (PACKET_BreakpointCommands) == PACKET_ENABLE;
11802 remote_trace_init (struct target_ops *self)
11805 remote_get_noisy_reply (&target_buf, &target_buf_size);
11806 if (strcmp (target_buf, "OK") != 0)
11807 error (_("Target does not support this command."));
11810 static void free_actions_list (char **actions_list);
11811 static void free_actions_list_cleanup_wrapper (void *);
11813 free_actions_list_cleanup_wrapper (void *al)
11815 free_actions_list ((char **) al);
11819 free_actions_list (char **actions_list)
11823 if (actions_list == 0)
11826 for (ndx = 0; actions_list[ndx]; ndx++)
11827 xfree (actions_list[ndx]);
11829 xfree (actions_list);
11832 /* Recursive routine to walk through command list including loops, and
11833 download packets for each command. */
11836 remote_download_command_source (int num, ULONGEST addr,
11837 struct command_line *cmds)
11839 struct remote_state *rs = get_remote_state ();
11840 struct command_line *cmd;
11842 for (cmd = cmds; cmd; cmd = cmd->next)
11844 QUIT; /* Allow user to bail out with ^C. */
11845 strcpy (rs->buf, "QTDPsrc:");
11846 encode_source_string (num, addr, "cmd", cmd->line,
11847 rs->buf + strlen (rs->buf),
11848 rs->buf_size - strlen (rs->buf));
11850 remote_get_noisy_reply (&target_buf, &target_buf_size);
11851 if (strcmp (target_buf, "OK"))
11852 warning (_("Target does not support source download."));
11854 if (cmd->control_type == while_control
11855 || cmd->control_type == while_stepping_control)
11857 remote_download_command_source (num, addr, *cmd->body_list);
11859 QUIT; /* Allow user to bail out with ^C. */
11860 strcpy (rs->buf, "QTDPsrc:");
11861 encode_source_string (num, addr, "cmd", "end",
11862 rs->buf + strlen (rs->buf),
11863 rs->buf_size - strlen (rs->buf));
11865 remote_get_noisy_reply (&target_buf, &target_buf_size);
11866 if (strcmp (target_buf, "OK"))
11867 warning (_("Target does not support source download."));
11873 remote_download_tracepoint (struct target_ops *self, struct bp_location *loc)
11875 #define BUF_SIZE 2048
11879 char buf[BUF_SIZE];
11880 char **tdp_actions;
11881 char **stepping_actions;
11883 struct cleanup *old_chain = NULL;
11884 struct agent_expr *aexpr;
11885 struct cleanup *aexpr_chain = NULL;
11887 struct breakpoint *b = loc->owner;
11888 struct tracepoint *t = (struct tracepoint *) b;
11890 encode_actions_rsp (loc, &tdp_actions, &stepping_actions);
11891 old_chain = make_cleanup (free_actions_list_cleanup_wrapper,
11893 (void) make_cleanup (free_actions_list_cleanup_wrapper,
11896 tpaddr = loc->address;
11897 sprintf_vma (addrbuf, tpaddr);
11898 xsnprintf (buf, BUF_SIZE, "QTDP:%x:%s:%c:%lx:%x", b->number,
11899 addrbuf, /* address */
11900 (b->enable_state == bp_enabled ? 'E' : 'D'),
11901 t->step_count, t->pass_count);
11902 /* Fast tracepoints are mostly handled by the target, but we can
11903 tell the target how big of an instruction block should be moved
11905 if (b->type == bp_fast_tracepoint)
11907 /* Only test for support at download time; we may not know
11908 target capabilities at definition time. */
11909 if (remote_supports_fast_tracepoints ())
11911 if (gdbarch_fast_tracepoint_valid_at (loc->gdbarch, tpaddr,
11913 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":F%x",
11914 gdb_insn_length (loc->gdbarch, tpaddr));
11916 /* If it passed validation at definition but fails now,
11917 something is very wrong. */
11918 internal_error (__FILE__, __LINE__,
11919 _("Fast tracepoint not "
11920 "valid during download"));
11923 /* Fast tracepoints are functionally identical to regular
11924 tracepoints, so don't take lack of support as a reason to
11925 give up on the trace run. */
11926 warning (_("Target does not support fast tracepoints, "
11927 "downloading %d as regular tracepoint"), b->number);
11929 else if (b->type == bp_static_tracepoint)
11931 /* Only test for support at download time; we may not know
11932 target capabilities at definition time. */
11933 if (remote_supports_static_tracepoints ())
11935 struct static_tracepoint_marker marker;
11937 if (target_static_tracepoint_marker_at (tpaddr, &marker))
11938 strcat (buf, ":S");
11940 error (_("Static tracepoint not valid during download"));
11943 /* Fast tracepoints are functionally identical to regular
11944 tracepoints, so don't take lack of support as a reason
11945 to give up on the trace run. */
11946 error (_("Target does not support static tracepoints"));
11948 /* If the tracepoint has a conditional, make it into an agent
11949 expression and append to the definition. */
11952 /* Only test support at download time, we may not know target
11953 capabilities at definition time. */
11954 if (remote_supports_cond_tracepoints ())
11956 aexpr = gen_eval_for_expr (tpaddr, loc->cond);
11957 aexpr_chain = make_cleanup_free_agent_expr (aexpr);
11958 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":X%x,",
11960 pkt = buf + strlen (buf);
11961 for (ndx = 0; ndx < aexpr->len; ++ndx)
11962 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
11964 do_cleanups (aexpr_chain);
11967 warning (_("Target does not support conditional tracepoints, "
11968 "ignoring tp %d cond"), b->number);
11971 if (b->commands || *default_collect)
11974 remote_get_noisy_reply (&target_buf, &target_buf_size);
11975 if (strcmp (target_buf, "OK"))
11976 error (_("Target does not support tracepoints."));
11978 /* do_single_steps (t); */
11981 for (ndx = 0; tdp_actions[ndx]; ndx++)
11983 QUIT; /* Allow user to bail out with ^C. */
11984 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%c",
11985 b->number, addrbuf, /* address */
11987 ((tdp_actions[ndx + 1] || stepping_actions)
11990 remote_get_noisy_reply (&target_buf,
11992 if (strcmp (target_buf, "OK"))
11993 error (_("Error on target while setting tracepoints."));
11996 if (stepping_actions)
11998 for (ndx = 0; stepping_actions[ndx]; ndx++)
12000 QUIT; /* Allow user to bail out with ^C. */
12001 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%s%s",
12002 b->number, addrbuf, /* address */
12003 ((ndx == 0) ? "S" : ""),
12004 stepping_actions[ndx],
12005 (stepping_actions[ndx + 1] ? "-" : ""));
12007 remote_get_noisy_reply (&target_buf,
12009 if (strcmp (target_buf, "OK"))
12010 error (_("Error on target while setting tracepoints."));
12014 if (packet_support (PACKET_TracepointSource) == PACKET_ENABLE)
12016 if (b->location != NULL)
12018 strcpy (buf, "QTDPsrc:");
12019 encode_source_string (b->number, loc->address, "at",
12020 event_location_to_string (b->location),
12021 buf + strlen (buf), 2048 - strlen (buf));
12023 remote_get_noisy_reply (&target_buf, &target_buf_size);
12024 if (strcmp (target_buf, "OK"))
12025 warning (_("Target does not support source download."));
12027 if (b->cond_string)
12029 strcpy (buf, "QTDPsrc:");
12030 encode_source_string (b->number, loc->address,
12031 "cond", b->cond_string, buf + strlen (buf),
12032 2048 - strlen (buf));
12034 remote_get_noisy_reply (&target_buf, &target_buf_size);
12035 if (strcmp (target_buf, "OK"))
12036 warning (_("Target does not support source download."));
12038 remote_download_command_source (b->number, loc->address,
12039 breakpoint_commands (b));
12042 do_cleanups (old_chain);
12046 remote_can_download_tracepoint (struct target_ops *self)
12048 struct remote_state *rs = get_remote_state ();
12049 struct trace_status *ts;
12052 /* Don't try to install tracepoints until we've relocated our
12053 symbols, and fetched and merged the target's tracepoint list with
12055 if (rs->starting_up)
12058 ts = current_trace_status ();
12059 status = remote_get_trace_status (self, ts);
12061 if (status == -1 || !ts->running_known || !ts->running)
12064 /* If we are in a tracing experiment, but remote stub doesn't support
12065 installing tracepoint in trace, we have to return. */
12066 if (!remote_supports_install_in_trace ())
12074 remote_download_trace_state_variable (struct target_ops *self,
12075 struct trace_state_variable *tsv)
12077 struct remote_state *rs = get_remote_state ();
12080 xsnprintf (rs->buf, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12081 tsv->number, phex ((ULONGEST) tsv->initial_value, 8),
12083 p = rs->buf + strlen (rs->buf);
12084 if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ())
12085 error (_("Trace state variable name too long for tsv definition packet"));
12086 p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, strlen (tsv->name));
12089 remote_get_noisy_reply (&target_buf, &target_buf_size);
12090 if (*target_buf == '\0')
12091 error (_("Target does not support this command."));
12092 if (strcmp (target_buf, "OK") != 0)
12093 error (_("Error on target while downloading trace state variable."));
12097 remote_enable_tracepoint (struct target_ops *self,
12098 struct bp_location *location)
12100 struct remote_state *rs = get_remote_state ();
12103 sprintf_vma (addr_buf, location->address);
12104 xsnprintf (rs->buf, get_remote_packet_size (), "QTEnable:%x:%s",
12105 location->owner->number, addr_buf);
12107 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
12108 if (*rs->buf == '\0')
12109 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12110 if (strcmp (rs->buf, "OK") != 0)
12111 error (_("Error on target while enabling tracepoint."));
12115 remote_disable_tracepoint (struct target_ops *self,
12116 struct bp_location *location)
12118 struct remote_state *rs = get_remote_state ();
12121 sprintf_vma (addr_buf, location->address);
12122 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisable:%x:%s",
12123 location->owner->number, addr_buf);
12125 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
12126 if (*rs->buf == '\0')
12127 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12128 if (strcmp (rs->buf, "OK") != 0)
12129 error (_("Error on target while disabling tracepoint."));
12133 remote_trace_set_readonly_regions (struct target_ops *self)
12137 bfd_size_type size;
12143 return; /* No information to give. */
12145 strcpy (target_buf, "QTro");
12146 offset = strlen (target_buf);
12147 for (s = exec_bfd->sections; s; s = s->next)
12149 char tmp1[40], tmp2[40];
12152 if ((s->flags & SEC_LOAD) == 0 ||
12153 /* (s->flags & SEC_CODE) == 0 || */
12154 (s->flags & SEC_READONLY) == 0)
12158 vma = bfd_get_section_vma (abfd, s);
12159 size = bfd_get_section_size (s);
12160 sprintf_vma (tmp1, vma);
12161 sprintf_vma (tmp2, vma + size);
12162 sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2);
12163 if (offset + sec_length + 1 > target_buf_size)
12165 if (packet_support (PACKET_qXfer_traceframe_info) != PACKET_ENABLE)
12167 Too many sections for read-only sections definition packet."));
12170 xsnprintf (target_buf + offset, target_buf_size - offset, ":%s,%s",
12172 offset += sec_length;
12176 putpkt (target_buf);
12177 getpkt (&target_buf, &target_buf_size, 0);
12182 remote_trace_start (struct target_ops *self)
12184 putpkt ("QTStart");
12185 remote_get_noisy_reply (&target_buf, &target_buf_size);
12186 if (*target_buf == '\0')
12187 error (_("Target does not support this command."));
12188 if (strcmp (target_buf, "OK") != 0)
12189 error (_("Bogus reply from target: %s"), target_buf);
12193 remote_get_trace_status (struct target_ops *self, struct trace_status *ts)
12195 /* Initialize it just to avoid a GCC false warning. */
12197 /* FIXME we need to get register block size some other way. */
12198 extern int trace_regblock_size;
12199 enum packet_result result;
12201 if (packet_support (PACKET_qTStatus) == PACKET_DISABLE)
12204 trace_regblock_size = get_remote_arch_state ()->sizeof_g_packet;
12206 putpkt ("qTStatus");
12210 p = remote_get_noisy_reply (&target_buf, &target_buf_size);
12212 CATCH (ex, RETURN_MASK_ERROR)
12214 if (ex.error != TARGET_CLOSE_ERROR)
12216 exception_fprintf (gdb_stderr, ex, "qTStatus: ");
12219 throw_exception (ex);
12223 result = packet_ok (p, &remote_protocol_packets[PACKET_qTStatus]);
12225 /* If the remote target doesn't do tracing, flag it. */
12226 if (result == PACKET_UNKNOWN)
12229 /* We're working with a live target. */
12230 ts->filename = NULL;
12233 error (_("Bogus trace status reply from target: %s"), target_buf);
12235 /* Function 'parse_trace_status' sets default value of each field of
12236 'ts' at first, so we don't have to do it here. */
12237 parse_trace_status (p, ts);
12239 return ts->running;
12243 remote_get_tracepoint_status (struct target_ops *self, struct breakpoint *bp,
12244 struct uploaded_tp *utp)
12246 struct remote_state *rs = get_remote_state ();
12248 struct bp_location *loc;
12249 struct tracepoint *tp = (struct tracepoint *) bp;
12250 size_t size = get_remote_packet_size ();
12254 tp->base.hit_count = 0;
12255 tp->traceframe_usage = 0;
12256 for (loc = tp->base.loc; loc; loc = loc->next)
12258 /* If the tracepoint was never downloaded, don't go asking for
12260 if (tp->number_on_target == 0)
12262 xsnprintf (rs->buf, size, "qTP:%x:%s", tp->number_on_target,
12263 phex_nz (loc->address, 0));
12265 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12266 if (reply && *reply)
12269 parse_tracepoint_status (reply + 1, bp, utp);
12275 utp->hit_count = 0;
12276 utp->traceframe_usage = 0;
12277 xsnprintf (rs->buf, size, "qTP:%x:%s", utp->number,
12278 phex_nz (utp->addr, 0));
12280 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12281 if (reply && *reply)
12284 parse_tracepoint_status (reply + 1, bp, utp);
12290 remote_trace_stop (struct target_ops *self)
12293 remote_get_noisy_reply (&target_buf, &target_buf_size);
12294 if (*target_buf == '\0')
12295 error (_("Target does not support this command."));
12296 if (strcmp (target_buf, "OK") != 0)
12297 error (_("Bogus reply from target: %s"), target_buf);
12301 remote_trace_find (struct target_ops *self,
12302 enum trace_find_type type, int num,
12303 CORE_ADDR addr1, CORE_ADDR addr2,
12306 struct remote_state *rs = get_remote_state ();
12307 char *endbuf = rs->buf + get_remote_packet_size ();
12309 int target_frameno = -1, target_tracept = -1;
12311 /* Lookups other than by absolute frame number depend on the current
12312 trace selected, so make sure it is correct on the remote end
12314 if (type != tfind_number)
12315 set_remote_traceframe ();
12318 strcpy (p, "QTFrame:");
12319 p = strchr (p, '\0');
12323 xsnprintf (p, endbuf - p, "%x", num);
12326 xsnprintf (p, endbuf - p, "pc:%s", phex_nz (addr1, 0));
12329 xsnprintf (p, endbuf - p, "tdp:%x", num);
12332 xsnprintf (p, endbuf - p, "range:%s:%s", phex_nz (addr1, 0),
12333 phex_nz (addr2, 0));
12335 case tfind_outside:
12336 xsnprintf (p, endbuf - p, "outside:%s:%s", phex_nz (addr1, 0),
12337 phex_nz (addr2, 0));
12340 error (_("Unknown trace find type %d"), type);
12344 reply = remote_get_noisy_reply (&(rs->buf), &rs->buf_size);
12345 if (*reply == '\0')
12346 error (_("Target does not support this command."));
12348 while (reply && *reply)
12353 target_frameno = (int) strtol (p, &reply, 16);
12355 error (_("Unable to parse trace frame number"));
12356 /* Don't update our remote traceframe number cache on failure
12357 to select a remote traceframe. */
12358 if (target_frameno == -1)
12363 target_tracept = (int) strtol (p, &reply, 16);
12365 error (_("Unable to parse tracepoint number"));
12367 case 'O': /* "OK"? */
12368 if (reply[1] == 'K' && reply[2] == '\0')
12371 error (_("Bogus reply from target: %s"), reply);
12374 error (_("Bogus reply from target: %s"), reply);
12377 *tpp = target_tracept;
12379 rs->remote_traceframe_number = target_frameno;
12380 return target_frameno;
12384 remote_get_trace_state_variable_value (struct target_ops *self,
12385 int tsvnum, LONGEST *val)
12387 struct remote_state *rs = get_remote_state ();
12391 set_remote_traceframe ();
12393 xsnprintf (rs->buf, get_remote_packet_size (), "qTV:%x", tsvnum);
12395 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12396 if (reply && *reply)
12400 unpack_varlen_hex (reply + 1, &uval);
12401 *val = (LONGEST) uval;
12409 remote_save_trace_data (struct target_ops *self, const char *filename)
12411 struct remote_state *rs = get_remote_state ();
12415 strcpy (p, "QTSave:");
12417 if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ())
12418 error (_("Remote file name too long for trace save packet"));
12419 p += 2 * bin2hex ((gdb_byte *) filename, p, strlen (filename));
12422 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12423 if (*reply == '\0')
12424 error (_("Target does not support this command."));
12425 if (strcmp (reply, "OK") != 0)
12426 error (_("Bogus reply from target: %s"), reply);
12430 /* This is basically a memory transfer, but needs to be its own packet
12431 because we don't know how the target actually organizes its trace
12432 memory, plus we want to be able to ask for as much as possible, but
12433 not be unhappy if we don't get as much as we ask for. */
12436 remote_get_raw_trace_data (struct target_ops *self,
12437 gdb_byte *buf, ULONGEST offset, LONGEST len)
12439 struct remote_state *rs = get_remote_state ();
12445 strcpy (p, "qTBuffer:");
12447 p += hexnumstr (p, offset);
12449 p += hexnumstr (p, len);
12453 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12454 if (reply && *reply)
12456 /* 'l' by itself means we're at the end of the buffer and
12457 there is nothing more to get. */
12461 /* Convert the reply into binary. Limit the number of bytes to
12462 convert according to our passed-in buffer size, rather than
12463 what was returned in the packet; if the target is
12464 unexpectedly generous and gives us a bigger reply than we
12465 asked for, we don't want to crash. */
12466 rslt = hex2bin (target_buf, buf, len);
12470 /* Something went wrong, flag as an error. */
12475 remote_set_disconnected_tracing (struct target_ops *self, int val)
12477 struct remote_state *rs = get_remote_state ();
12479 if (packet_support (PACKET_DisconnectedTracing_feature) == PACKET_ENABLE)
12483 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisconnected:%x", val);
12485 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12486 if (*reply == '\0')
12487 error (_("Target does not support this command."));
12488 if (strcmp (reply, "OK") != 0)
12489 error (_("Bogus reply from target: %s"), reply);
12492 warning (_("Target does not support disconnected tracing."));
12496 remote_core_of_thread (struct target_ops *ops, ptid_t ptid)
12498 struct thread_info *info = find_thread_ptid (ptid);
12500 if (info && info->priv)
12501 return info->priv->core;
12506 remote_set_circular_trace_buffer (struct target_ops *self, int val)
12508 struct remote_state *rs = get_remote_state ();
12511 xsnprintf (rs->buf, get_remote_packet_size (), "QTBuffer:circular:%x", val);
12513 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12514 if (*reply == '\0')
12515 error (_("Target does not support this command."));
12516 if (strcmp (reply, "OK") != 0)
12517 error (_("Bogus reply from target: %s"), reply);
12520 static struct traceframe_info *
12521 remote_traceframe_info (struct target_ops *self)
12525 text = target_read_stralloc (¤t_target,
12526 TARGET_OBJECT_TRACEFRAME_INFO, NULL);
12529 struct traceframe_info *info;
12530 struct cleanup *back_to = make_cleanup (xfree, text);
12532 info = parse_traceframe_info (text);
12533 do_cleanups (back_to);
12540 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12541 instruction on which a fast tracepoint may be placed. Returns -1
12542 if the packet is not supported, and 0 if the minimum instruction
12543 length is unknown. */
12546 remote_get_min_fast_tracepoint_insn_len (struct target_ops *self)
12548 struct remote_state *rs = get_remote_state ();
12551 /* If we're not debugging a process yet, the IPA can't be
12553 if (!target_has_execution)
12556 /* Make sure the remote is pointing at the right process. */
12557 set_general_process ();
12559 xsnprintf (rs->buf, get_remote_packet_size (), "qTMinFTPILen");
12561 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12562 if (*reply == '\0')
12566 ULONGEST min_insn_len;
12568 unpack_varlen_hex (reply, &min_insn_len);
12570 return (int) min_insn_len;
12575 remote_set_trace_buffer_size (struct target_ops *self, LONGEST val)
12577 if (packet_support (PACKET_QTBuffer_size) != PACKET_DISABLE)
12579 struct remote_state *rs = get_remote_state ();
12580 char *buf = rs->buf;
12581 char *endbuf = rs->buf + get_remote_packet_size ();
12582 enum packet_result result;
12584 gdb_assert (val >= 0 || val == -1);
12585 buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:");
12586 /* Send -1 as literal "-1" to avoid host size dependency. */
12590 buf += hexnumstr (buf, (ULONGEST) -val);
12593 buf += hexnumstr (buf, (ULONGEST) val);
12596 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
12597 result = packet_ok (rs->buf,
12598 &remote_protocol_packets[PACKET_QTBuffer_size]);
12600 if (result != PACKET_OK)
12601 warning (_("Bogus reply from target: %s"), rs->buf);
12606 remote_set_trace_notes (struct target_ops *self,
12607 const char *user, const char *notes,
12608 const char *stop_notes)
12610 struct remote_state *rs = get_remote_state ();
12612 char *buf = rs->buf;
12613 char *endbuf = rs->buf + get_remote_packet_size ();
12616 buf += xsnprintf (buf, endbuf - buf, "QTNotes:");
12619 buf += xsnprintf (buf, endbuf - buf, "user:");
12620 nbytes = bin2hex ((gdb_byte *) user, buf, strlen (user));
12626 buf += xsnprintf (buf, endbuf - buf, "notes:");
12627 nbytes = bin2hex ((gdb_byte *) notes, buf, strlen (notes));
12633 buf += xsnprintf (buf, endbuf - buf, "tstop:");
12634 nbytes = bin2hex ((gdb_byte *) stop_notes, buf, strlen (stop_notes));
12638 /* Ensure the buffer is terminated. */
12642 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12643 if (*reply == '\0')
12646 if (strcmp (reply, "OK") != 0)
12647 error (_("Bogus reply from target: %s"), reply);
12653 remote_use_agent (struct target_ops *self, int use)
12655 if (packet_support (PACKET_QAgent) != PACKET_DISABLE)
12657 struct remote_state *rs = get_remote_state ();
12659 /* If the stub supports QAgent. */
12660 xsnprintf (rs->buf, get_remote_packet_size (), "QAgent:%d", use);
12662 getpkt (&rs->buf, &rs->buf_size, 0);
12664 if (strcmp (rs->buf, "OK") == 0)
12675 remote_can_use_agent (struct target_ops *self)
12677 return (packet_support (PACKET_QAgent) != PACKET_DISABLE);
12680 struct btrace_target_info
12682 /* The ptid of the traced thread. */
12685 /* The obtained branch trace configuration. */
12686 struct btrace_config conf;
12689 /* Reset our idea of our target's btrace configuration. */
12692 remote_btrace_reset (void)
12694 struct remote_state *rs = get_remote_state ();
12696 memset (&rs->btrace_config, 0, sizeof (rs->btrace_config));
12699 /* Check whether the target supports branch tracing. */
12702 remote_supports_btrace (struct target_ops *self, enum btrace_format format)
12704 if (packet_support (PACKET_Qbtrace_off) != PACKET_ENABLE)
12706 if (packet_support (PACKET_qXfer_btrace) != PACKET_ENABLE)
12711 case BTRACE_FORMAT_NONE:
12714 case BTRACE_FORMAT_BTS:
12715 return (packet_support (PACKET_Qbtrace_bts) == PACKET_ENABLE);
12717 case BTRACE_FORMAT_PT:
12718 /* The trace is decoded on the host. Even if our target supports it,
12719 we still need to have libipt to decode the trace. */
12720 #if defined (HAVE_LIBIPT)
12721 return (packet_support (PACKET_Qbtrace_pt) == PACKET_ENABLE);
12722 #else /* !defined (HAVE_LIBIPT) */
12724 #endif /* !defined (HAVE_LIBIPT) */
12727 internal_error (__FILE__, __LINE__, _("Unknown branch trace format"));
12730 /* Synchronize the configuration with the target. */
12733 btrace_sync_conf (const struct btrace_config *conf)
12735 struct packet_config *packet;
12736 struct remote_state *rs;
12737 char *buf, *pos, *endbuf;
12739 rs = get_remote_state ();
12741 endbuf = buf + get_remote_packet_size ();
12743 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_bts_size];
12744 if (packet_config_support (packet) == PACKET_ENABLE
12745 && conf->bts.size != rs->btrace_config.bts.size)
12748 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
12752 getpkt (&buf, &rs->buf_size, 0);
12754 if (packet_ok (buf, packet) == PACKET_ERROR)
12756 if (buf[0] == 'E' && buf[1] == '.')
12757 error (_("Failed to configure the BTS buffer size: %s"), buf + 2);
12759 error (_("Failed to configure the BTS buffer size."));
12762 rs->btrace_config.bts.size = conf->bts.size;
12765 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_pt_size];
12766 if (packet_config_support (packet) == PACKET_ENABLE
12767 && conf->pt.size != rs->btrace_config.pt.size)
12770 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
12774 getpkt (&buf, &rs->buf_size, 0);
12776 if (packet_ok (buf, packet) == PACKET_ERROR)
12778 if (buf[0] == 'E' && buf[1] == '.')
12779 error (_("Failed to configure the trace buffer size: %s"), buf + 2);
12781 error (_("Failed to configure the trace buffer size."));
12784 rs->btrace_config.pt.size = conf->pt.size;
12788 /* Read the current thread's btrace configuration from the target and
12789 store it into CONF. */
12792 btrace_read_config (struct btrace_config *conf)
12796 xml = target_read_stralloc (¤t_target,
12797 TARGET_OBJECT_BTRACE_CONF, "");
12800 struct cleanup *cleanup;
12802 cleanup = make_cleanup (xfree, xml);
12803 parse_xml_btrace_conf (conf, xml);
12804 do_cleanups (cleanup);
12808 /* Enable branch tracing. */
12810 static struct btrace_target_info *
12811 remote_enable_btrace (struct target_ops *self, ptid_t ptid,
12812 const struct btrace_config *conf)
12814 struct btrace_target_info *tinfo = NULL;
12815 struct packet_config *packet = NULL;
12816 struct remote_state *rs = get_remote_state ();
12817 char *buf = rs->buf;
12818 char *endbuf = rs->buf + get_remote_packet_size ();
12820 switch (conf->format)
12822 case BTRACE_FORMAT_BTS:
12823 packet = &remote_protocol_packets[PACKET_Qbtrace_bts];
12826 case BTRACE_FORMAT_PT:
12827 packet = &remote_protocol_packets[PACKET_Qbtrace_pt];
12831 if (packet == NULL || packet_config_support (packet) != PACKET_ENABLE)
12832 error (_("Target does not support branch tracing."));
12834 btrace_sync_conf (conf);
12836 set_general_thread (ptid);
12838 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
12840 getpkt (&rs->buf, &rs->buf_size, 0);
12842 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
12844 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
12845 error (_("Could not enable branch tracing for %s: %s"),
12846 target_pid_to_str (ptid), rs->buf + 2);
12848 error (_("Could not enable branch tracing for %s."),
12849 target_pid_to_str (ptid));
12852 tinfo = XCNEW (struct btrace_target_info);
12853 tinfo->ptid = ptid;
12855 /* If we fail to read the configuration, we lose some information, but the
12856 tracing itself is not impacted. */
12859 btrace_read_config (&tinfo->conf);
12861 CATCH (err, RETURN_MASK_ERROR)
12863 if (err.message != NULL)
12864 warning ("%s", err.message);
12871 /* Disable branch tracing. */
12874 remote_disable_btrace (struct target_ops *self,
12875 struct btrace_target_info *tinfo)
12877 struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_off];
12878 struct remote_state *rs = get_remote_state ();
12879 char *buf = rs->buf;
12880 char *endbuf = rs->buf + get_remote_packet_size ();
12882 if (packet_config_support (packet) != PACKET_ENABLE)
12883 error (_("Target does not support branch tracing."));
12885 set_general_thread (tinfo->ptid);
12887 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
12889 getpkt (&rs->buf, &rs->buf_size, 0);
12891 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
12893 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
12894 error (_("Could not disable branch tracing for %s: %s"),
12895 target_pid_to_str (tinfo->ptid), rs->buf + 2);
12897 error (_("Could not disable branch tracing for %s."),
12898 target_pid_to_str (tinfo->ptid));
12904 /* Teardown branch tracing. */
12907 remote_teardown_btrace (struct target_ops *self,
12908 struct btrace_target_info *tinfo)
12910 /* We must not talk to the target during teardown. */
12914 /* Read the branch trace. */
12916 static enum btrace_error
12917 remote_read_btrace (struct target_ops *self,
12918 struct btrace_data *btrace,
12919 struct btrace_target_info *tinfo,
12920 enum btrace_read_type type)
12922 struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace];
12923 struct remote_state *rs = get_remote_state ();
12924 struct cleanup *cleanup;
12928 if (packet_config_support (packet) != PACKET_ENABLE)
12929 error (_("Target does not support branch tracing."));
12931 #if !defined(HAVE_LIBEXPAT)
12932 error (_("Cannot process branch tracing result. XML parsing not supported."));
12937 case BTRACE_READ_ALL:
12940 case BTRACE_READ_NEW:
12943 case BTRACE_READ_DELTA:
12947 internal_error (__FILE__, __LINE__,
12948 _("Bad branch tracing read type: %u."),
12949 (unsigned int) type);
12952 xml = target_read_stralloc (¤t_target,
12953 TARGET_OBJECT_BTRACE, annex);
12955 return BTRACE_ERR_UNKNOWN;
12957 cleanup = make_cleanup (xfree, xml);
12958 parse_xml_btrace (btrace, xml);
12959 do_cleanups (cleanup);
12961 return BTRACE_ERR_NONE;
12964 static const struct btrace_config *
12965 remote_btrace_conf (struct target_ops *self,
12966 const struct btrace_target_info *tinfo)
12968 return &tinfo->conf;
12972 remote_augmented_libraries_svr4_read (struct target_ops *self)
12974 return (packet_support (PACKET_augmented_libraries_svr4_read_feature)
12978 /* Implementation of to_load. */
12981 remote_load (struct target_ops *self, const char *name, int from_tty)
12983 generic_load (name, from_tty);
12986 /* Accepts an integer PID; returns a string representing a file that
12987 can be opened on the remote side to get the symbols for the child
12988 process. Returns NULL if the operation is not supported. */
12991 remote_pid_to_exec_file (struct target_ops *self, int pid)
12993 static char *filename = NULL;
12994 struct inferior *inf;
12995 char *annex = NULL;
12997 if (packet_support (PACKET_qXfer_exec_file) != PACKET_ENABLE)
13000 if (filename != NULL)
13003 inf = find_inferior_pid (pid);
13005 internal_error (__FILE__, __LINE__,
13006 _("not currently attached to process %d"), pid);
13008 if (!inf->fake_pid_p)
13010 const int annex_size = 9;
13012 annex = (char *) alloca (annex_size);
13013 xsnprintf (annex, annex_size, "%x", pid);
13016 filename = target_read_stralloc (¤t_target,
13017 TARGET_OBJECT_EXEC_FILE, annex);
13022 /* Implement the to_can_do_single_step target_ops method. */
13025 remote_can_do_single_step (struct target_ops *ops)
13027 /* We can only tell whether target supports single step or not by
13028 supported s and S vCont actions if the stub supports vContSupported
13029 feature. If the stub doesn't support vContSupported feature,
13030 we have conservatively to think target doesn't supports single
13032 if (packet_support (PACKET_vContSupported) == PACKET_ENABLE)
13034 struct remote_state *rs = get_remote_state ();
13036 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
13037 remote_vcont_probe (rs);
13039 return rs->supports_vCont.s && rs->supports_vCont.S;
13046 init_remote_ops (void)
13048 remote_ops.to_shortname = "remote";
13049 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
13050 remote_ops.to_doc =
13051 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13052 Specify the serial device it is connected to\n\
13053 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13054 remote_ops.to_open = remote_open;
13055 remote_ops.to_close = remote_close;
13056 remote_ops.to_detach = remote_detach;
13057 remote_ops.to_disconnect = remote_disconnect;
13058 remote_ops.to_resume = remote_resume;
13059 remote_ops.to_wait = remote_wait;
13060 remote_ops.to_fetch_registers = remote_fetch_registers;
13061 remote_ops.to_store_registers = remote_store_registers;
13062 remote_ops.to_prepare_to_store = remote_prepare_to_store;
13063 remote_ops.to_files_info = remote_files_info;
13064 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
13065 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
13066 remote_ops.to_stopped_by_sw_breakpoint = remote_stopped_by_sw_breakpoint;
13067 remote_ops.to_supports_stopped_by_sw_breakpoint = remote_supports_stopped_by_sw_breakpoint;
13068 remote_ops.to_stopped_by_hw_breakpoint = remote_stopped_by_hw_breakpoint;
13069 remote_ops.to_supports_stopped_by_hw_breakpoint = remote_supports_stopped_by_hw_breakpoint;
13070 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
13071 remote_ops.to_stopped_data_address = remote_stopped_data_address;
13072 remote_ops.to_watchpoint_addr_within_range =
13073 remote_watchpoint_addr_within_range;
13074 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
13075 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
13076 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
13077 remote_ops.to_region_ok_for_hw_watchpoint
13078 = remote_region_ok_for_hw_watchpoint;
13079 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
13080 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
13081 remote_ops.to_kill = remote_kill;
13082 remote_ops.to_load = remote_load;
13083 remote_ops.to_mourn_inferior = remote_mourn;
13084 remote_ops.to_pass_signals = remote_pass_signals;
13085 remote_ops.to_set_syscall_catchpoint = remote_set_syscall_catchpoint;
13086 remote_ops.to_program_signals = remote_program_signals;
13087 remote_ops.to_thread_alive = remote_thread_alive;
13088 remote_ops.to_thread_name = remote_thread_name;
13089 remote_ops.to_update_thread_list = remote_update_thread_list;
13090 remote_ops.to_pid_to_str = remote_pid_to_str;
13091 remote_ops.to_extra_thread_info = remote_threads_extra_info;
13092 remote_ops.to_get_ada_task_ptid = remote_get_ada_task_ptid;
13093 remote_ops.to_stop = remote_stop;
13094 remote_ops.to_interrupt = remote_interrupt;
13095 remote_ops.to_check_pending_interrupt = remote_check_pending_interrupt;
13096 remote_ops.to_xfer_partial = remote_xfer_partial;
13097 remote_ops.to_rcmd = remote_rcmd;
13098 remote_ops.to_pid_to_exec_file = remote_pid_to_exec_file;
13099 remote_ops.to_log_command = serial_log_command;
13100 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
13101 remote_ops.to_stratum = process_stratum;
13102 remote_ops.to_has_all_memory = default_child_has_all_memory;
13103 remote_ops.to_has_memory = default_child_has_memory;
13104 remote_ops.to_has_stack = default_child_has_stack;
13105 remote_ops.to_has_registers = default_child_has_registers;
13106 remote_ops.to_has_execution = default_child_has_execution;
13107 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
13108 remote_ops.to_can_execute_reverse = remote_can_execute_reverse;
13109 remote_ops.to_magic = OPS_MAGIC;
13110 remote_ops.to_memory_map = remote_memory_map;
13111 remote_ops.to_flash_erase = remote_flash_erase;
13112 remote_ops.to_flash_done = remote_flash_done;
13113 remote_ops.to_read_description = remote_read_description;
13114 remote_ops.to_search_memory = remote_search_memory;
13115 remote_ops.to_can_async_p = remote_can_async_p;
13116 remote_ops.to_is_async_p = remote_is_async_p;
13117 remote_ops.to_async = remote_async;
13118 remote_ops.to_thread_events = remote_thread_events;
13119 remote_ops.to_can_do_single_step = remote_can_do_single_step;
13120 remote_ops.to_terminal_inferior = remote_terminal_inferior;
13121 remote_ops.to_terminal_ours = remote_terminal_ours;
13122 remote_ops.to_supports_non_stop = remote_supports_non_stop;
13123 remote_ops.to_supports_multi_process = remote_supports_multi_process;
13124 remote_ops.to_supports_disable_randomization
13125 = remote_supports_disable_randomization;
13126 remote_ops.to_filesystem_is_local = remote_filesystem_is_local;
13127 remote_ops.to_fileio_open = remote_hostio_open;
13128 remote_ops.to_fileio_pwrite = remote_hostio_pwrite;
13129 remote_ops.to_fileio_pread = remote_hostio_pread;
13130 remote_ops.to_fileio_fstat = remote_hostio_fstat;
13131 remote_ops.to_fileio_close = remote_hostio_close;
13132 remote_ops.to_fileio_unlink = remote_hostio_unlink;
13133 remote_ops.to_fileio_readlink = remote_hostio_readlink;
13134 remote_ops.to_supports_enable_disable_tracepoint = remote_supports_enable_disable_tracepoint;
13135 remote_ops.to_supports_string_tracing = remote_supports_string_tracing;
13136 remote_ops.to_supports_evaluation_of_breakpoint_conditions = remote_supports_cond_breakpoints;
13137 remote_ops.to_can_run_breakpoint_commands = remote_can_run_breakpoint_commands;
13138 remote_ops.to_trace_init = remote_trace_init;
13139 remote_ops.to_download_tracepoint = remote_download_tracepoint;
13140 remote_ops.to_can_download_tracepoint = remote_can_download_tracepoint;
13141 remote_ops.to_download_trace_state_variable
13142 = remote_download_trace_state_variable;
13143 remote_ops.to_enable_tracepoint = remote_enable_tracepoint;
13144 remote_ops.to_disable_tracepoint = remote_disable_tracepoint;
13145 remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions;
13146 remote_ops.to_trace_start = remote_trace_start;
13147 remote_ops.to_get_trace_status = remote_get_trace_status;
13148 remote_ops.to_get_tracepoint_status = remote_get_tracepoint_status;
13149 remote_ops.to_trace_stop = remote_trace_stop;
13150 remote_ops.to_trace_find = remote_trace_find;
13151 remote_ops.to_get_trace_state_variable_value
13152 = remote_get_trace_state_variable_value;
13153 remote_ops.to_save_trace_data = remote_save_trace_data;
13154 remote_ops.to_upload_tracepoints = remote_upload_tracepoints;
13155 remote_ops.to_upload_trace_state_variables
13156 = remote_upload_trace_state_variables;
13157 remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data;
13158 remote_ops.to_get_min_fast_tracepoint_insn_len = remote_get_min_fast_tracepoint_insn_len;
13159 remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing;
13160 remote_ops.to_set_circular_trace_buffer = remote_set_circular_trace_buffer;
13161 remote_ops.to_set_trace_buffer_size = remote_set_trace_buffer_size;
13162 remote_ops.to_set_trace_notes = remote_set_trace_notes;
13163 remote_ops.to_core_of_thread = remote_core_of_thread;
13164 remote_ops.to_verify_memory = remote_verify_memory;
13165 remote_ops.to_get_tib_address = remote_get_tib_address;
13166 remote_ops.to_set_permissions = remote_set_permissions;
13167 remote_ops.to_static_tracepoint_marker_at
13168 = remote_static_tracepoint_marker_at;
13169 remote_ops.to_static_tracepoint_markers_by_strid
13170 = remote_static_tracepoint_markers_by_strid;
13171 remote_ops.to_traceframe_info = remote_traceframe_info;
13172 remote_ops.to_use_agent = remote_use_agent;
13173 remote_ops.to_can_use_agent = remote_can_use_agent;
13174 remote_ops.to_supports_btrace = remote_supports_btrace;
13175 remote_ops.to_enable_btrace = remote_enable_btrace;
13176 remote_ops.to_disable_btrace = remote_disable_btrace;
13177 remote_ops.to_teardown_btrace = remote_teardown_btrace;
13178 remote_ops.to_read_btrace = remote_read_btrace;
13179 remote_ops.to_btrace_conf = remote_btrace_conf;
13180 remote_ops.to_augmented_libraries_svr4_read =
13181 remote_augmented_libraries_svr4_read;
13182 remote_ops.to_follow_fork = remote_follow_fork;
13183 remote_ops.to_follow_exec = remote_follow_exec;
13184 remote_ops.to_insert_fork_catchpoint = remote_insert_fork_catchpoint;
13185 remote_ops.to_remove_fork_catchpoint = remote_remove_fork_catchpoint;
13186 remote_ops.to_insert_vfork_catchpoint = remote_insert_vfork_catchpoint;
13187 remote_ops.to_remove_vfork_catchpoint = remote_remove_vfork_catchpoint;
13188 remote_ops.to_insert_exec_catchpoint = remote_insert_exec_catchpoint;
13189 remote_ops.to_remove_exec_catchpoint = remote_remove_exec_catchpoint;
13192 /* Set up the extended remote vector by making a copy of the standard
13193 remote vector and adding to it. */
13196 init_extended_remote_ops (void)
13198 extended_remote_ops = remote_ops;
13200 extended_remote_ops.to_shortname = "extended-remote";
13201 extended_remote_ops.to_longname =
13202 "Extended remote serial target in gdb-specific protocol";
13203 extended_remote_ops.to_doc =
13204 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13205 Specify the serial device it is connected to (e.g. /dev/ttya).";
13206 extended_remote_ops.to_open = extended_remote_open;
13207 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
13208 extended_remote_ops.to_detach = extended_remote_detach;
13209 extended_remote_ops.to_attach = extended_remote_attach;
13210 extended_remote_ops.to_post_attach = extended_remote_post_attach;
13211 extended_remote_ops.to_supports_disable_randomization
13212 = extended_remote_supports_disable_randomization;
13216 remote_can_async_p (struct target_ops *ops)
13218 struct remote_state *rs = get_remote_state ();
13220 if (!target_async_permitted)
13221 /* We only enable async when the user specifically asks for it. */
13224 /* We're async whenever the serial device is. */
13225 return serial_can_async_p (rs->remote_desc);
13229 remote_is_async_p (struct target_ops *ops)
13231 struct remote_state *rs = get_remote_state ();
13233 if (!target_async_permitted)
13234 /* We only enable async when the user specifically asks for it. */
13237 /* We're async whenever the serial device is. */
13238 return serial_is_async_p (rs->remote_desc);
13241 /* Pass the SERIAL event on and up to the client. One day this code
13242 will be able to delay notifying the client of an event until the
13243 point where an entire packet has been received. */
13245 static serial_event_ftype remote_async_serial_handler;
13248 remote_async_serial_handler (struct serial *scb, void *context)
13250 struct remote_state *rs = (struct remote_state *) context;
13252 /* Don't propogate error information up to the client. Instead let
13253 the client find out about the error by querying the target. */
13254 inferior_event_handler (INF_REG_EVENT, NULL);
13258 remote_async_inferior_event_handler (gdb_client_data data)
13260 inferior_event_handler (INF_REG_EVENT, NULL);
13264 remote_async (struct target_ops *ops, int enable)
13266 struct remote_state *rs = get_remote_state ();
13270 serial_async (rs->remote_desc, remote_async_serial_handler, rs);
13272 /* If there are pending events in the stop reply queue tell the
13273 event loop to process them. */
13274 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
13275 mark_async_event_handler (remote_async_inferior_event_token);
13276 /* For simplicity, below we clear the pending events token
13277 without remembering whether it is marked, so here we always
13278 mark it. If there's actually no pending notification to
13279 process, this ends up being a no-op (other than a spurious
13280 event-loop wakeup). */
13281 if (target_is_non_stop_p ())
13282 mark_async_event_handler (rs->notif_state->get_pending_events_token);
13286 serial_async (rs->remote_desc, NULL, NULL);
13287 /* If the core is disabling async, it doesn't want to be
13288 disturbed with target events. Clear all async event sources
13290 clear_async_event_handler (remote_async_inferior_event_token);
13291 if (target_is_non_stop_p ())
13292 clear_async_event_handler (rs->notif_state->get_pending_events_token);
13296 /* Implementation of the to_thread_events method. */
13299 remote_thread_events (struct target_ops *ops, int enable)
13301 struct remote_state *rs = get_remote_state ();
13302 size_t size = get_remote_packet_size ();
13305 if (packet_support (PACKET_QThreadEvents) == PACKET_DISABLE)
13308 xsnprintf (rs->buf, size, "QThreadEvents:%x", enable ? 1 : 0);
13310 getpkt (&rs->buf, &rs->buf_size, 0);
13312 switch (packet_ok (rs->buf,
13313 &remote_protocol_packets[PACKET_QThreadEvents]))
13316 if (strcmp (rs->buf, "OK") != 0)
13317 error (_("Remote refused setting thread events: %s"), rs->buf);
13320 warning (_("Remote failure reply: %s"), rs->buf);
13322 case PACKET_UNKNOWN:
13328 set_remote_cmd (char *args, int from_tty)
13330 help_list (remote_set_cmdlist, "set remote ", all_commands, gdb_stdout);
13334 show_remote_cmd (char *args, int from_tty)
13336 /* We can't just use cmd_show_list here, because we want to skip
13337 the redundant "show remote Z-packet" and the legacy aliases. */
13338 struct cleanup *showlist_chain;
13339 struct cmd_list_element *list = remote_show_cmdlist;
13340 struct ui_out *uiout = current_uiout;
13342 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
13343 for (; list != NULL; list = list->next)
13344 if (strcmp (list->name, "Z-packet") == 0)
13346 else if (list->type == not_set_cmd)
13347 /* Alias commands are exactly like the original, except they
13348 don't have the normal type. */
13352 struct cleanup *option_chain
13353 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
13355 ui_out_field_string (uiout, "name", list->name);
13356 ui_out_text (uiout, ": ");
13357 if (list->type == show_cmd)
13358 do_show_command ((char *) NULL, from_tty, list);
13360 cmd_func (list, NULL, from_tty);
13361 /* Close the tuple. */
13362 do_cleanups (option_chain);
13365 /* Close the tuple. */
13366 do_cleanups (showlist_chain);
13370 /* Function to be called whenever a new objfile (shlib) is detected. */
13372 remote_new_objfile (struct objfile *objfile)
13374 struct remote_state *rs = get_remote_state ();
13376 if (rs->remote_desc != 0) /* Have a remote connection. */
13377 remote_check_symbols ();
13380 /* Pull all the tracepoints defined on the target and create local
13381 data structures representing them. We don't want to create real
13382 tracepoints yet, we don't want to mess up the user's existing
13386 remote_upload_tracepoints (struct target_ops *self, struct uploaded_tp **utpp)
13388 struct remote_state *rs = get_remote_state ();
13391 /* Ask for a first packet of tracepoint definition. */
13393 getpkt (&rs->buf, &rs->buf_size, 0);
13395 while (*p && *p != 'l')
13397 parse_tracepoint_definition (p, utpp);
13398 /* Ask for another packet of tracepoint definition. */
13400 getpkt (&rs->buf, &rs->buf_size, 0);
13407 remote_upload_trace_state_variables (struct target_ops *self,
13408 struct uploaded_tsv **utsvp)
13410 struct remote_state *rs = get_remote_state ();
13413 /* Ask for a first packet of variable definition. */
13415 getpkt (&rs->buf, &rs->buf_size, 0);
13417 while (*p && *p != 'l')
13419 parse_tsv_definition (p, utsvp);
13420 /* Ask for another packet of variable definition. */
13422 getpkt (&rs->buf, &rs->buf_size, 0);
13428 /* The "set/show range-stepping" show hook. */
13431 show_range_stepping (struct ui_file *file, int from_tty,
13432 struct cmd_list_element *c,
13435 fprintf_filtered (file,
13436 _("Debugger's willingness to use range stepping "
13437 "is %s.\n"), value);
13440 /* The "set/show range-stepping" set hook. */
13443 set_range_stepping (char *ignore_args, int from_tty,
13444 struct cmd_list_element *c)
13446 struct remote_state *rs = get_remote_state ();
13448 /* Whene enabling, check whether range stepping is actually
13449 supported by the target, and warn if not. */
13450 if (use_range_stepping)
13452 if (rs->remote_desc != NULL)
13454 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
13455 remote_vcont_probe (rs);
13457 if (packet_support (PACKET_vCont) == PACKET_ENABLE
13458 && rs->supports_vCont.r)
13462 warning (_("Range stepping is not supported by the current target"));
13467 _initialize_remote (void)
13469 struct remote_state *rs;
13470 struct cmd_list_element *cmd;
13471 const char *cmd_name;
13473 /* architecture specific data */
13474 remote_gdbarch_data_handle =
13475 gdbarch_data_register_post_init (init_remote_state);
13476 remote_g_packet_data_handle =
13477 gdbarch_data_register_pre_init (remote_g_packet_data_init);
13480 = register_program_space_data_with_cleanup (NULL,
13481 remote_pspace_data_cleanup);
13483 /* Initialize the per-target state. At the moment there is only one
13484 of these, not one per target. Only one target is active at a
13486 remote_state = new_remote_state ();
13488 init_remote_ops ();
13489 add_target (&remote_ops);
13491 init_extended_remote_ops ();
13492 add_target (&extended_remote_ops);
13494 /* Hook into new objfile notification. */
13495 observer_attach_new_objfile (remote_new_objfile);
13496 /* We're no longer interested in notification events of an inferior
13498 observer_attach_inferior_exit (discard_pending_stop_replies);
13500 /* Set up signal handlers. */
13501 async_sigint_remote_token =
13502 create_async_signal_handler (async_remote_interrupt, NULL);
13503 async_sigint_remote_twice_token =
13504 create_async_signal_handler (async_remote_interrupt_twice, NULL);
13507 init_remote_threadtests ();
13510 stop_reply_queue = QUEUE_alloc (stop_reply_p, stop_reply_xfree);
13511 /* set/show remote ... */
13513 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
13514 Remote protocol specific variables\n\
13515 Configure various remote-protocol specific variables such as\n\
13516 the packets being used"),
13517 &remote_set_cmdlist, "set remote ",
13518 0 /* allow-unknown */, &setlist);
13519 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
13520 Remote protocol specific variables\n\
13521 Configure various remote-protocol specific variables such as\n\
13522 the packets being used"),
13523 &remote_show_cmdlist, "show remote ",
13524 0 /* allow-unknown */, &showlist);
13526 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
13527 Compare section data on target to the exec file.\n\
13528 Argument is a single section name (default: all loaded sections).\n\
13529 To compare only read-only loaded sections, specify the -r option."),
13532 add_cmd ("packet", class_maintenance, packet_command, _("\
13533 Send an arbitrary packet to a remote target.\n\
13534 maintenance packet TEXT\n\
13535 If GDB is talking to an inferior via the GDB serial protocol, then\n\
13536 this command sends the string TEXT to the inferior, and displays the\n\
13537 response packet. GDB supplies the initial `$' character, and the\n\
13538 terminating `#' character and checksum."),
13541 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
13542 Set whether to send break if interrupted."), _("\
13543 Show whether to send break if interrupted."), _("\
13544 If set, a break, instead of a cntrl-c, is sent to the remote target."),
13545 set_remotebreak, show_remotebreak,
13546 &setlist, &showlist);
13547 cmd_name = "remotebreak";
13548 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
13549 deprecate_cmd (cmd, "set remote interrupt-sequence");
13550 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
13551 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
13552 deprecate_cmd (cmd, "show remote interrupt-sequence");
13554 add_setshow_enum_cmd ("interrupt-sequence", class_support,
13555 interrupt_sequence_modes, &interrupt_sequence_mode,
13557 Set interrupt sequence to remote target."), _("\
13558 Show interrupt sequence to remote target."), _("\
13559 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
13560 NULL, show_interrupt_sequence,
13561 &remote_set_cmdlist,
13562 &remote_show_cmdlist);
13564 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
13565 &interrupt_on_connect, _("\
13566 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13567 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13568 If set, interrupt sequence is sent to remote target."),
13570 &remote_set_cmdlist, &remote_show_cmdlist);
13572 /* Install commands for configuring memory read/write packets. */
13574 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
13575 Set the maximum number of bytes per memory write packet (deprecated)."),
13577 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
13578 Show the maximum number of bytes per memory write packet (deprecated)."),
13580 add_cmd ("memory-write-packet-size", no_class,
13581 set_memory_write_packet_size, _("\
13582 Set the maximum number of bytes per memory-write packet.\n\
13583 Specify the number of bytes in a packet or 0 (zero) for the\n\
13584 default packet size. The actual limit is further reduced\n\
13585 dependent on the target. Specify ``fixed'' to disable the\n\
13586 further restriction and ``limit'' to enable that restriction."),
13587 &remote_set_cmdlist);
13588 add_cmd ("memory-read-packet-size", no_class,
13589 set_memory_read_packet_size, _("\
13590 Set the maximum number of bytes per memory-read packet.\n\
13591 Specify the number of bytes in a packet or 0 (zero) for the\n\
13592 default packet size. The actual limit is further reduced\n\
13593 dependent on the target. Specify ``fixed'' to disable the\n\
13594 further restriction and ``limit'' to enable that restriction."),
13595 &remote_set_cmdlist);
13596 add_cmd ("memory-write-packet-size", no_class,
13597 show_memory_write_packet_size,
13598 _("Show the maximum number of bytes per memory-write packet."),
13599 &remote_show_cmdlist);
13600 add_cmd ("memory-read-packet-size", no_class,
13601 show_memory_read_packet_size,
13602 _("Show the maximum number of bytes per memory-read packet."),
13603 &remote_show_cmdlist);
13605 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
13606 &remote_hw_watchpoint_limit, _("\
13607 Set the maximum number of target hardware watchpoints."), _("\
13608 Show the maximum number of target hardware watchpoints."), _("\
13609 Specify a negative limit for unlimited."),
13610 NULL, NULL, /* FIXME: i18n: The maximum
13611 number of target hardware
13612 watchpoints is %s. */
13613 &remote_set_cmdlist, &remote_show_cmdlist);
13614 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class,
13615 &remote_hw_watchpoint_length_limit, _("\
13616 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
13617 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
13618 Specify a negative limit for unlimited."),
13619 NULL, NULL, /* FIXME: i18n: The maximum
13620 length (in bytes) of a target
13621 hardware watchpoint is %s. */
13622 &remote_set_cmdlist, &remote_show_cmdlist);
13623 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
13624 &remote_hw_breakpoint_limit, _("\
13625 Set the maximum number of target hardware breakpoints."), _("\
13626 Show the maximum number of target hardware breakpoints."), _("\
13627 Specify a negative limit for unlimited."),
13628 NULL, NULL, /* FIXME: i18n: The maximum
13629 number of target hardware
13630 breakpoints is %s. */
13631 &remote_set_cmdlist, &remote_show_cmdlist);
13633 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure,
13634 &remote_address_size, _("\
13635 Set the maximum size of the address (in bits) in a memory packet."), _("\
13636 Show the maximum size of the address (in bits) in a memory packet."), NULL,
13638 NULL, /* FIXME: i18n: */
13639 &setlist, &showlist);
13641 init_all_packet_configs ();
13643 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
13644 "X", "binary-download", 1);
13646 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
13647 "vCont", "verbose-resume", 0);
13649 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
13650 "QPassSignals", "pass-signals", 0);
13652 add_packet_config_cmd (&remote_protocol_packets[PACKET_QCatchSyscalls],
13653 "QCatchSyscalls", "catch-syscalls", 0);
13655 add_packet_config_cmd (&remote_protocol_packets[PACKET_QProgramSignals],
13656 "QProgramSignals", "program-signals", 0);
13658 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
13659 "qSymbol", "symbol-lookup", 0);
13661 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
13662 "P", "set-register", 1);
13664 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
13665 "p", "fetch-register", 1);
13667 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
13668 "Z0", "software-breakpoint", 0);
13670 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
13671 "Z1", "hardware-breakpoint", 0);
13673 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
13674 "Z2", "write-watchpoint", 0);
13676 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
13677 "Z3", "read-watchpoint", 0);
13679 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
13680 "Z4", "access-watchpoint", 0);
13682 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
13683 "qXfer:auxv:read", "read-aux-vector", 0);
13685 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_exec_file],
13686 "qXfer:exec-file:read", "pid-to-exec-file", 0);
13688 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
13689 "qXfer:features:read", "target-features", 0);
13691 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
13692 "qXfer:libraries:read", "library-info", 0);
13694 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4],
13695 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
13697 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
13698 "qXfer:memory-map:read", "memory-map", 0);
13700 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
13701 "qXfer:spu:read", "read-spu-object", 0);
13703 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
13704 "qXfer:spu:write", "write-spu-object", 0);
13706 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
13707 "qXfer:osdata:read", "osdata", 0);
13709 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
13710 "qXfer:threads:read", "threads", 0);
13712 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
13713 "qXfer:siginfo:read", "read-siginfo-object", 0);
13715 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
13716 "qXfer:siginfo:write", "write-siginfo-object", 0);
13718 add_packet_config_cmd
13719 (&remote_protocol_packets[PACKET_qXfer_traceframe_info],
13720 "qXfer:traceframe-info:read", "traceframe-info", 0);
13722 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_uib],
13723 "qXfer:uib:read", "unwind-info-block", 0);
13725 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
13726 "qGetTLSAddr", "get-thread-local-storage-address",
13729 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr],
13730 "qGetTIBAddr", "get-thread-information-block-address",
13733 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
13734 "bc", "reverse-continue", 0);
13736 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
13737 "bs", "reverse-step", 0);
13739 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
13740 "qSupported", "supported-packets", 0);
13742 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
13743 "qSearch:memory", "search-memory", 0);
13745 add_packet_config_cmd (&remote_protocol_packets[PACKET_qTStatus],
13746 "qTStatus", "trace-status", 0);
13748 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_setfs],
13749 "vFile:setfs", "hostio-setfs", 0);
13751 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
13752 "vFile:open", "hostio-open", 0);
13754 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
13755 "vFile:pread", "hostio-pread", 0);
13757 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
13758 "vFile:pwrite", "hostio-pwrite", 0);
13760 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
13761 "vFile:close", "hostio-close", 0);
13763 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
13764 "vFile:unlink", "hostio-unlink", 0);
13766 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink],
13767 "vFile:readlink", "hostio-readlink", 0);
13769 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_fstat],
13770 "vFile:fstat", "hostio-fstat", 0);
13772 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
13773 "vAttach", "attach", 0);
13775 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
13778 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
13779 "QStartNoAckMode", "noack", 0);
13781 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
13782 "vKill", "kill", 0);
13784 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
13785 "qAttached", "query-attached", 0);
13787 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
13788 "ConditionalTracepoints",
13789 "conditional-tracepoints", 0);
13791 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints],
13792 "ConditionalBreakpoints",
13793 "conditional-breakpoints", 0);
13795 add_packet_config_cmd (&remote_protocol_packets[PACKET_BreakpointCommands],
13796 "BreakpointCommands",
13797 "breakpoint-commands", 0);
13799 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
13800 "FastTracepoints", "fast-tracepoints", 0);
13802 add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource],
13803 "TracepointSource", "TracepointSource", 0);
13805 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow],
13806 "QAllow", "allow", 0);
13808 add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints],
13809 "StaticTracepoints", "static-tracepoints", 0);
13811 add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace],
13812 "InstallInTrace", "install-in-trace", 0);
13814 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read],
13815 "qXfer:statictrace:read", "read-sdata-object", 0);
13817 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic],
13818 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
13820 add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization],
13821 "QDisableRandomization", "disable-randomization", 0);
13823 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAgent],
13824 "QAgent", "agent", 0);
13826 add_packet_config_cmd (&remote_protocol_packets[PACKET_QTBuffer_size],
13827 "QTBuffer:size", "trace-buffer-size", 0);
13829 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_off],
13830 "Qbtrace:off", "disable-btrace", 0);
13832 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts],
13833 "Qbtrace:bts", "enable-btrace-bts", 0);
13835 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_pt],
13836 "Qbtrace:pt", "enable-btrace-pt", 0);
13838 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace],
13839 "qXfer:btrace", "read-btrace", 0);
13841 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace_conf],
13842 "qXfer:btrace-conf", "read-btrace-conf", 0);
13844 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_bts_size],
13845 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
13847 add_packet_config_cmd (&remote_protocol_packets[PACKET_multiprocess_feature],
13848 "multiprocess-feature", "multiprocess-feature", 0);
13850 add_packet_config_cmd (&remote_protocol_packets[PACKET_swbreak_feature],
13851 "swbreak-feature", "swbreak-feature", 0);
13853 add_packet_config_cmd (&remote_protocol_packets[PACKET_hwbreak_feature],
13854 "hwbreak-feature", "hwbreak-feature", 0);
13856 add_packet_config_cmd (&remote_protocol_packets[PACKET_fork_event_feature],
13857 "fork-event-feature", "fork-event-feature", 0);
13859 add_packet_config_cmd (&remote_protocol_packets[PACKET_vfork_event_feature],
13860 "vfork-event-feature", "vfork-event-feature", 0);
13862 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_pt_size],
13863 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
13865 add_packet_config_cmd (&remote_protocol_packets[PACKET_vContSupported],
13866 "vContSupported", "verbose-resume-supported", 0);
13868 add_packet_config_cmd (&remote_protocol_packets[PACKET_exec_event_feature],
13869 "exec-event-feature", "exec-event-feature", 0);
13871 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCtrlC],
13872 "vCtrlC", "ctrl-c", 0);
13874 add_packet_config_cmd (&remote_protocol_packets[PACKET_QThreadEvents],
13875 "QThreadEvents", "thread-events", 0);
13877 add_packet_config_cmd (&remote_protocol_packets[PACKET_no_resumed],
13878 "N stop reply", "no-resumed-stop-reply", 0);
13880 /* Assert that we've registered "set remote foo-packet" commands
13881 for all packet configs. */
13885 for (i = 0; i < PACKET_MAX; i++)
13887 /* Ideally all configs would have a command associated. Some
13888 still don't though. */
13893 case PACKET_QNonStop:
13894 case PACKET_EnableDisableTracepoints_feature:
13895 case PACKET_tracenz_feature:
13896 case PACKET_DisconnectedTracing_feature:
13897 case PACKET_augmented_libraries_svr4_read_feature:
13899 /* Additions to this list need to be well justified:
13900 pre-existing packets are OK; new packets are not. */
13908 /* This catches both forgetting to add a config command, and
13909 forgetting to remove a packet from the exception list. */
13910 gdb_assert (excepted == (remote_protocol_packets[i].name == NULL));
13914 /* Keep the old ``set remote Z-packet ...'' working. Each individual
13915 Z sub-packet has its own set and show commands, but users may
13916 have sets to this variable in their .gdbinit files (or in their
13918 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
13919 &remote_Z_packet_detect, _("\
13920 Set use of remote protocol `Z' packets"), _("\
13921 Show use of remote protocol `Z' packets "), _("\
13922 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
13924 set_remote_protocol_Z_packet_cmd,
13925 show_remote_protocol_Z_packet_cmd,
13926 /* FIXME: i18n: Use of remote protocol
13927 `Z' packets is %s. */
13928 &remote_set_cmdlist, &remote_show_cmdlist);
13930 add_prefix_cmd ("remote", class_files, remote_command, _("\
13931 Manipulate files on the remote system\n\
13932 Transfer files to and from the remote target system."),
13933 &remote_cmdlist, "remote ",
13934 0 /* allow-unknown */, &cmdlist);
13936 add_cmd ("put", class_files, remote_put_command,
13937 _("Copy a local file to the remote system."),
13940 add_cmd ("get", class_files, remote_get_command,
13941 _("Copy a remote file to the local system."),
13944 add_cmd ("delete", class_files, remote_delete_command,
13945 _("Delete a remote file."),
13948 add_setshow_string_noescape_cmd ("exec-file", class_files,
13949 &remote_exec_file_var, _("\
13950 Set the remote pathname for \"run\""), _("\
13951 Show the remote pathname for \"run\""), NULL,
13952 set_remote_exec_file,
13953 show_remote_exec_file,
13954 &remote_set_cmdlist,
13955 &remote_show_cmdlist);
13957 add_setshow_boolean_cmd ("range-stepping", class_run,
13958 &use_range_stepping, _("\
13959 Enable or disable range stepping."), _("\
13960 Show whether target-assisted range stepping is enabled."), _("\
13961 If on, and the target supports it, when stepping a source line, GDB\n\
13962 tells the target to step the corresponding range of addresses itself instead\n\
13963 of issuing multiple single-steps. This speeds up source level\n\
13964 stepping. If off, GDB always issues single-steps, even if range\n\
13965 stepping is supported by the target. The default is on."),
13966 set_range_stepping,
13967 show_range_stepping,
13971 /* Eventually initialize fileio. See fileio.c */
13972 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
13974 /* Take advantage of the fact that the TID field is not used, to tag
13975 special ptids with it set to != 0. */
13976 magic_null_ptid = ptid_build (42000, -1, 1);
13977 not_sent_ptid = ptid_build (42000, -2, 1);
13978 any_thread_ptid = ptid_build (42000, 0, 1);
13980 target_buf_size = 2048;
13981 target_buf = (char *) xmalloc (target_buf_size);