1 /* Main code for remote server for GDB.
2 Copyright (C) 1989-2013 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "gdbthread.h"
30 #include "btrace-common.h"
31 #include "filestuff.h"
32 #include "tracepoint.h"
36 /* The thread set with an `Hc' packet. `Hc' is deprecated in favor of
37 `vCont'. Note the multi-process extensions made `vCont' a
38 requirement, so `Hc pPID.TID' is pretty much undefined. So
39 CONT_THREAD can be null_ptid for no `Hc' thread, minus_one_ptid for
40 resuming all threads of the process (again, `Hc' isn't used for
41 multi-process), or a specific thread ptid_t.
43 We also set this when handling a single-thread `vCont' resume, as
44 some places in the backends check it to know when (and for which
45 thread) single-thread scheduler-locking is in effect. */
48 /* The thread set with an `Hg' packet. */
49 ptid_t general_thread;
53 static int extended_protocol;
54 static int response_needed;
55 static int exit_requested;
57 /* --once: Exit after the first connection has closed. */
63 /* Whether we should attempt to disable the operating system's address
64 space randomization feature before starting an inferior. */
65 int disable_randomization = 1;
67 static char **program_argv, **wrapper_argv;
69 /* Enable miscellaneous debugging output. The name is historical - it
70 was originally used to debug LinuxThreads support. */
73 /* Enable debugging of h/w breakpoint/watchpoint support. */
76 int pass_signals[GDB_SIGNAL_LAST];
77 int program_signals[GDB_SIGNAL_LAST];
78 int program_signals_p;
82 /* The PID of the originally created or attached inferior. Used to
83 send signals to the process when GDB sends us an asynchronous interrupt
84 (user hitting Control-C in the client), and to wait for the child to exit
85 when no longer debugging it. */
87 unsigned long signal_pid;
90 /* A file descriptor for the controlling terminal. */
93 /* TERMINAL_FD's original foreground group. */
94 pid_t old_foreground_pgrp;
96 /* Hand back terminal ownership to the original foreground group. */
99 restore_old_foreground_pgrp (void)
101 tcsetpgrp (terminal_fd, old_foreground_pgrp);
105 /* Set if you want to disable optional thread related packets support
106 in gdbserver, for the sake of testing GDB against stubs that don't
108 int disable_packet_vCont;
109 int disable_packet_Tthread;
110 int disable_packet_qC;
111 int disable_packet_qfThreadInfo;
113 /* Last status reported to GDB. */
114 static struct target_waitstatus last_status;
115 static ptid_t last_ptid;
117 static char *own_buf;
118 static unsigned char *mem_buf;
120 /* A sub-class of 'struct notif_event' for stop, holding information
121 relative to a single stop reply. We keep a queue of these to
122 push to GDB in non-stop mode. */
126 struct notif_event base;
128 /* Thread or process that got the event. */
132 struct target_waitstatus status;
135 DEFINE_QUEUE_P (notif_event_p);
137 /* Put a stop reply to the stop reply queue. */
140 queue_stop_reply (ptid_t ptid, struct target_waitstatus *status)
142 struct vstop_notif *new_notif = xmalloc (sizeof (*new_notif));
144 new_notif->ptid = ptid;
145 new_notif->status = *status;
147 notif_event_enque (¬if_stop, (struct notif_event *) new_notif);
151 remove_all_on_match_pid (QUEUE (notif_event_p) *q,
152 QUEUE_ITER (notif_event_p) *iter,
153 struct notif_event *event,
159 || ptid_get_pid (((struct vstop_notif *) event)->ptid) == *pid)
161 if (q->free_func != NULL)
162 q->free_func (event);
164 QUEUE_remove_elem (notif_event_p, q, iter);
170 /* Get rid of the currently pending stop replies for PID. If PID is
171 -1, then apply to all processes. */
174 discard_queued_stop_replies (int pid)
176 QUEUE_iterate (notif_event_p, notif_stop.queue,
177 remove_all_on_match_pid, &pid);
181 vstop_notif_reply (struct notif_event *event, char *own_buf)
183 struct vstop_notif *vstop = (struct vstop_notif *) event;
185 prepare_resume_reply (own_buf, vstop->ptid, &vstop->status);
188 struct notif_server notif_stop =
190 "vStopped", "Stop", NULL, vstop_notif_reply,
194 target_running (void)
196 return all_threads.head != NULL;
200 start_inferior (char **argv)
202 char **new_argv = argv;
204 if (wrapper_argv != NULL)
208 for (i = 0; wrapper_argv[i] != NULL; i++)
210 for (i = 0; argv[i] != NULL; i++)
212 new_argv = alloca (sizeof (char *) * count);
214 for (i = 0; wrapper_argv[i] != NULL; i++)
215 new_argv[count++] = wrapper_argv[i];
216 for (i = 0; argv[i] != NULL; i++)
217 new_argv[count++] = argv[i];
218 new_argv[count] = NULL;
224 for (i = 0; new_argv[i]; ++i)
225 fprintf (stderr, "new_argv[%d] = \"%s\"\n", i, new_argv[i]);
230 signal (SIGTTOU, SIG_DFL);
231 signal (SIGTTIN, SIG_DFL);
234 /* Clear this so the backend doesn't get confused, thinking
235 CONT_THREAD died, and it needs to resume all threads. */
236 cont_thread = null_ptid;
238 signal_pid = create_inferior (new_argv[0], new_argv);
240 /* FIXME: we don't actually know at this point that the create
241 actually succeeded. We won't know that until we wait. */
242 fprintf (stderr, "Process %s created; pid = %ld\n", argv[0],
247 signal (SIGTTOU, SIG_IGN);
248 signal (SIGTTIN, SIG_IGN);
249 terminal_fd = fileno (stderr);
250 old_foreground_pgrp = tcgetpgrp (terminal_fd);
251 tcsetpgrp (terminal_fd, signal_pid);
252 atexit (restore_old_foreground_pgrp);
255 if (wrapper_argv != NULL)
257 struct thread_resume resume_info;
259 memset (&resume_info, 0, sizeof (resume_info));
260 resume_info.thread = pid_to_ptid (signal_pid);
261 resume_info.kind = resume_continue;
264 last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
266 if (last_status.kind != TARGET_WAITKIND_STOPPED)
271 (*the_target->resume) (&resume_info, 1);
273 last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
274 if (last_status.kind != TARGET_WAITKIND_STOPPED)
277 current_inferior->last_resume_kind = resume_stop;
278 current_inferior->last_status = last_status;
280 while (last_status.value.sig != GDB_SIGNAL_TRAP);
285 /* Wait till we are at 1st instruction in program, return new pid
286 (assuming success). */
287 last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
289 if (last_status.kind != TARGET_WAITKIND_EXITED
290 && last_status.kind != TARGET_WAITKIND_SIGNALLED)
292 current_inferior->last_resume_kind = resume_stop;
293 current_inferior->last_status = last_status;
300 attach_inferior (int pid)
302 /* myattach should return -1 if attaching is unsupported,
303 0 if it succeeded, and call error() otherwise. */
305 if (myattach (pid) != 0)
308 fprintf (stderr, "Attached; pid = %d\n", pid);
311 /* FIXME - It may be that we should get the SIGNAL_PID from the
312 attach function, so that it can be the main thread instead of
313 whichever we were told to attach to. */
316 /* Clear this so the backend doesn't get confused, thinking
317 CONT_THREAD died, and it needs to resume all threads. */
318 cont_thread = null_ptid;
322 last_ptid = mywait (pid_to_ptid (pid), &last_status, 0, 0);
324 /* GDB knows to ignore the first SIGSTOP after attaching to a running
325 process using the "attach" command, but this is different; it's
326 just using "target remote". Pretend it's just starting up. */
327 if (last_status.kind == TARGET_WAITKIND_STOPPED
328 && last_status.value.sig == GDB_SIGNAL_STOP)
329 last_status.value.sig = GDB_SIGNAL_TRAP;
331 current_inferior->last_resume_kind = resume_stop;
332 current_inferior->last_status = last_status;
338 extern int remote_debug;
340 /* Decode a qXfer read request. Return 0 if everything looks OK,
344 decode_xfer_read (char *buf, CORE_ADDR *ofs, unsigned int *len)
346 /* After the read marker and annex, qXfer looks like a
347 traditional 'm' packet. */
348 decode_m_packet (buf, ofs, len);
354 decode_xfer (char *buf, char **object, char **rw, char **annex, char **offset)
356 /* Extract and NUL-terminate the object. */
358 while (*buf && *buf != ':')
364 /* Extract and NUL-terminate the read/write action. */
366 while (*buf && *buf != ':')
372 /* Extract and NUL-terminate the annex. */
374 while (*buf && *buf != ':')
384 /* Write the response to a successful qXfer read. Returns the
385 length of the (binary) data stored in BUF, corresponding
386 to as much of DATA/LEN as we could fit. IS_MORE controls
387 the first character of the response. */
389 write_qxfer_response (char *buf, const void *data, int len, int is_more)
398 return remote_escape_output (data, len, (unsigned char *) buf + 1, &out_len,
402 /* Handle btrace enabling. */
405 handle_btrace_enable (struct thread_info *thread)
407 if (thread->btrace != NULL)
408 return "E.Btrace already enabled.";
410 thread->btrace = target_enable_btrace (thread->entry.id);
411 if (thread->btrace == NULL)
412 return "E.Could not enable btrace.";
417 /* Handle btrace disabling. */
420 handle_btrace_disable (struct thread_info *thread)
423 if (thread->btrace == NULL)
424 return "E.Branch tracing not enabled.";
426 if (target_disable_btrace (thread->btrace) != 0)
427 return "E.Could not disable branch tracing.";
429 thread->btrace = NULL;
433 /* Handle the "Qbtrace" packet. */
436 handle_btrace_general_set (char *own_buf)
438 struct thread_info *thread;
442 if (strncmp ("Qbtrace:", own_buf, strlen ("Qbtrace:")) != 0)
445 op = own_buf + strlen ("Qbtrace:");
447 if (!target_supports_btrace ())
449 strcpy (own_buf, "E.Target does not support branch tracing.");
453 if (ptid_equal (general_thread, null_ptid)
454 || ptid_equal (general_thread, minus_one_ptid))
456 strcpy (own_buf, "E.Must select a single thread.");
460 thread = find_thread_ptid (general_thread);
463 strcpy (own_buf, "E.No such thread.");
469 if (strcmp (op, "bts") == 0)
470 err = handle_btrace_enable (thread);
471 else if (strcmp (op, "off") == 0)
472 err = handle_btrace_disable (thread);
474 err = "E.Bad Qbtrace operation. Use bts or off.";
477 strcpy (own_buf, err);
484 /* Handle all of the extended 'Q' packets. */
487 handle_general_set (char *own_buf)
489 if (strncmp ("QPassSignals:", own_buf, strlen ("QPassSignals:")) == 0)
491 int numsigs = (int) GDB_SIGNAL_LAST, i;
492 const char *p = own_buf + strlen ("QPassSignals:");
495 p = decode_address_to_semicolon (&cursig, p);
496 for (i = 0; i < numsigs; i++)
502 /* Keep looping, to clear the remaining signals. */
505 p = decode_address_to_semicolon (&cursig, p);
510 strcpy (own_buf, "OK");
514 if (strncmp ("QProgramSignals:", own_buf, strlen ("QProgramSignals:")) == 0)
516 int numsigs = (int) GDB_SIGNAL_LAST, i;
517 const char *p = own_buf + strlen ("QProgramSignals:");
520 program_signals_p = 1;
522 p = decode_address_to_semicolon (&cursig, p);
523 for (i = 0; i < numsigs; i++)
527 program_signals[i] = 1;
529 /* Keep looping, to clear the remaining signals. */
532 p = decode_address_to_semicolon (&cursig, p);
535 program_signals[i] = 0;
537 strcpy (own_buf, "OK");
541 if (strcmp (own_buf, "QStartNoAckMode") == 0)
545 fprintf (stderr, "[noack mode enabled]\n");
554 if (strncmp (own_buf, "QNonStop:", 9) == 0)
556 char *mode = own_buf + 9;
560 if (strcmp (mode, "0") == 0)
562 else if (strcmp (mode, "1") == 0)
566 /* We don't know what this mode is, so complain to
568 fprintf (stderr, "Unknown non-stop mode requested: %s\n",
574 req_str = req ? "non-stop" : "all-stop";
575 if (start_non_stop (req) != 0)
577 fprintf (stderr, "Setting %s mode failed\n", req_str);
585 fprintf (stderr, "[%s mode enabled]\n", req_str);
591 if (strncmp ("QDisableRandomization:", own_buf,
592 strlen ("QDisableRandomization:")) == 0)
594 char *packet = own_buf + strlen ("QDisableRandomization:");
597 unpack_varlen_hex (packet, &setting);
598 disable_randomization = setting;
602 if (disable_randomization)
603 fprintf (stderr, "[address space randomization disabled]\n");
605 fprintf (stderr, "[address space randomization enabled]\n");
612 if (target_supports_tracepoints ()
613 && handle_tracepoint_general_set (own_buf))
616 if (strncmp ("QAgent:", own_buf, strlen ("QAgent:")) == 0)
618 char *mode = own_buf + strlen ("QAgent:");
621 if (strcmp (mode, "0") == 0)
623 else if (strcmp (mode, "1") == 0)
627 /* We don't know what this value is, so complain to GDB. */
628 sprintf (own_buf, "E.Unknown QAgent value");
632 /* Update the flag. */
635 fprintf (stderr, "[%s agent]\n", req ? "Enable" : "Disable");
640 if (handle_btrace_general_set (own_buf))
643 /* Otherwise we didn't know what packet it was. Say we didn't
649 get_features_xml (const char *annex)
651 const struct target_desc *desc = current_target_desc ();
653 /* `desc->xmltarget' defines what to return when looking for the
654 "target.xml" file. Its contents can either be verbatim XML code
655 (prefixed with a '@') or else the name of the actual XML file to
656 be used in place of "target.xml".
658 This variable is set up from the auto-generated
659 init_registers_... routine for the current target. */
661 if (desc->xmltarget != NULL && strcmp (annex, "target.xml") == 0)
663 if (*desc->xmltarget == '@')
664 return desc->xmltarget + 1;
666 annex = desc->xmltarget;
671 extern const char *const xml_builtin[][2];
674 /* Look for the annex. */
675 for (i = 0; xml_builtin[i][0] != NULL; i++)
676 if (strcmp (annex, xml_builtin[i][0]) == 0)
679 if (xml_builtin[i][0] != NULL)
680 return xml_builtin[i][1];
688 monitor_show_help (void)
690 monitor_output ("The following monitor commands are supported:\n");
691 monitor_output (" set debug <0|1>\n");
692 monitor_output (" Enable general debugging messages\n");
693 monitor_output (" set debug-hw-points <0|1>\n");
694 monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
695 monitor_output (" set remote-debug <0|1>\n");
696 monitor_output (" Enable remote protocol debugging messages\n");
697 monitor_output (" exit\n");
698 monitor_output (" Quit GDBserver\n");
701 /* Read trace frame or inferior memory. Returns the number of bytes
702 actually read, zero when no further transfer is possible, and -1 on
703 error. Return of a positive value smaller than LEN does not
704 indicate there's no more to be read, only the end of the transfer.
705 E.g., when GDB reads memory from a traceframe, a first request may
706 be served from a memory block that does not cover the whole request
707 length. A following request gets the rest served from either
708 another block (of the same traceframe) or from the read-only
712 gdb_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
716 if (current_traceframe >= 0)
719 ULONGEST length = len;
721 if (traceframe_read_mem (current_traceframe,
722 memaddr, myaddr, len, &nbytes))
724 /* Data read from trace buffer, we're done. */
727 if (!in_readonly_region (memaddr, length))
729 /* Otherwise we have a valid readonly case, fall through. */
730 /* (assume no half-trace half-real blocks for now) */
733 res = prepare_to_access_memory ();
736 res = read_inferior_memory (memaddr, myaddr, len);
737 done_accessing_memory ();
739 return res == 0 ? len : -1;
745 /* Write trace frame or inferior memory. Actually, writing to trace
746 frames is forbidden. */
749 gdb_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
751 if (current_traceframe >= 0)
757 ret = prepare_to_access_memory ();
760 ret = write_inferior_memory (memaddr, myaddr, len);
761 done_accessing_memory ();
767 /* Subroutine of handle_search_memory to simplify it. */
770 handle_search_memory_1 (CORE_ADDR start_addr, CORE_ADDR search_space_len,
771 gdb_byte *pattern, unsigned pattern_len,
772 gdb_byte *search_buf,
773 unsigned chunk_size, unsigned search_buf_size,
774 CORE_ADDR *found_addrp)
776 /* Prime the search buffer. */
778 if (gdb_read_memory (start_addr, search_buf, search_buf_size)
781 warning ("Unable to access %ld bytes of target "
782 "memory at 0x%lx, halting search.",
783 (long) search_buf_size, (long) start_addr);
787 /* Perform the search.
789 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
790 When we've scanned N bytes we copy the trailing bytes to the start and
791 read in another N bytes. */
793 while (search_space_len >= pattern_len)
796 unsigned nr_search_bytes = (search_space_len < search_buf_size
800 found_ptr = memmem (search_buf, nr_search_bytes, pattern, pattern_len);
802 if (found_ptr != NULL)
804 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
805 *found_addrp = found_addr;
809 /* Not found in this chunk, skip to next chunk. */
811 /* Don't let search_space_len wrap here, it's unsigned. */
812 if (search_space_len >= chunk_size)
813 search_space_len -= chunk_size;
815 search_space_len = 0;
817 if (search_space_len >= pattern_len)
819 unsigned keep_len = search_buf_size - chunk_size;
820 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
823 /* Copy the trailing part of the previous iteration to the front
824 of the buffer for the next iteration. */
825 memcpy (search_buf, search_buf + chunk_size, keep_len);
827 nr_to_read = (search_space_len - keep_len < chunk_size
828 ? search_space_len - keep_len
831 if (gdb_read_memory (read_addr, search_buf + keep_len,
832 nr_to_read) != search_buf_size)
834 warning ("Unable to access %ld bytes of target memory "
835 "at 0x%lx, halting search.",
836 (long) nr_to_read, (long) read_addr);
840 start_addr += chunk_size;
849 /* Handle qSearch:memory packets. */
852 handle_search_memory (char *own_buf, int packet_len)
854 CORE_ADDR start_addr;
855 CORE_ADDR search_space_len;
857 unsigned int pattern_len;
858 /* NOTE: also defined in find.c testcase. */
859 #define SEARCH_CHUNK_SIZE 16000
860 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
861 /* Buffer to hold memory contents for searching. */
862 gdb_byte *search_buf;
863 unsigned search_buf_size;
865 CORE_ADDR found_addr;
866 int cmd_name_len = sizeof ("qSearch:memory:") - 1;
868 pattern = malloc (packet_len);
871 error ("Unable to allocate memory to perform the search");
872 strcpy (own_buf, "E00");
875 if (decode_search_memory_packet (own_buf + cmd_name_len,
876 packet_len - cmd_name_len,
877 &start_addr, &search_space_len,
878 pattern, &pattern_len) < 0)
881 error ("Error in parsing qSearch:memory packet");
882 strcpy (own_buf, "E00");
886 search_buf_size = chunk_size + pattern_len - 1;
888 /* No point in trying to allocate a buffer larger than the search space. */
889 if (search_space_len < search_buf_size)
890 search_buf_size = search_space_len;
892 search_buf = malloc (search_buf_size);
893 if (search_buf == NULL)
896 error ("Unable to allocate memory to perform the search");
897 strcpy (own_buf, "E00");
901 found = handle_search_memory_1 (start_addr, search_space_len,
902 pattern, pattern_len,
903 search_buf, chunk_size, search_buf_size,
907 sprintf (own_buf, "1,%lx", (long) found_addr);
909 strcpy (own_buf, "0");
911 strcpy (own_buf, "E00");
917 #define require_running(BUF) \
918 if (!target_running ()) \
924 /* Handle monitor commands not handled by target-specific handlers. */
927 handle_monitor_command (char *mon, char *own_buf)
929 if (strcmp (mon, "set debug 1") == 0)
932 monitor_output ("Debug output enabled.\n");
934 else if (strcmp (mon, "set debug 0") == 0)
937 monitor_output ("Debug output disabled.\n");
939 else if (strcmp (mon, "set debug-hw-points 1") == 0)
942 monitor_output ("H/W point debugging output enabled.\n");
944 else if (strcmp (mon, "set debug-hw-points 0") == 0)
947 monitor_output ("H/W point debugging output disabled.\n");
949 else if (strcmp (mon, "set remote-debug 1") == 0)
952 monitor_output ("Protocol debug output enabled.\n");
954 else if (strcmp (mon, "set remote-debug 0") == 0)
957 monitor_output ("Protocol debug output disabled.\n");
959 else if (strcmp (mon, "help") == 0)
960 monitor_show_help ();
961 else if (strcmp (mon, "exit") == 0)
965 monitor_output ("Unknown monitor command.\n\n");
966 monitor_show_help ();
971 /* Associates a callback with each supported qXfer'able object. */
975 /* The object this handler handles. */
978 /* Request that the target transfer up to LEN 8-bit bytes of the
979 target's OBJECT. The OFFSET, for a seekable object, specifies
980 the starting point. The ANNEX can be used to provide additional
981 data-specific information to the target.
983 Return the number of bytes actually transfered, zero when no
984 further transfer is possible, -1 on error, -2 when the transfer
985 is not supported, and -3 on a verbose error message that should
986 be preserved. Return of a positive value smaller than LEN does
987 not indicate the end of the object, only the end of the transfer.
989 One, and only one, of readbuf or writebuf must be non-NULL. */
990 int (*xfer) (const char *annex,
991 gdb_byte *readbuf, const gdb_byte *writebuf,
992 ULONGEST offset, LONGEST len);
995 /* Handle qXfer:auxv:read. */
998 handle_qxfer_auxv (const char *annex,
999 gdb_byte *readbuf, const gdb_byte *writebuf,
1000 ULONGEST offset, LONGEST len)
1002 if (the_target->read_auxv == NULL || writebuf != NULL)
1005 if (annex[0] != '\0' || !target_running ())
1008 return (*the_target->read_auxv) (offset, readbuf, len);
1011 /* Handle qXfer:features:read. */
1014 handle_qxfer_features (const char *annex,
1015 gdb_byte *readbuf, const gdb_byte *writebuf,
1016 ULONGEST offset, LONGEST len)
1018 const char *document;
1021 if (writebuf != NULL)
1024 if (!target_running ())
1027 /* Grab the correct annex. */
1028 document = get_features_xml (annex);
1029 if (document == NULL)
1032 total_len = strlen (document);
1034 if (offset > total_len)
1037 if (offset + len > total_len)
1038 len = total_len - offset;
1040 memcpy (readbuf, document + offset, len);
1044 /* Handle qXfer:libraries:read. */
1047 handle_qxfer_libraries (const char *annex,
1048 gdb_byte *readbuf, const gdb_byte *writebuf,
1049 ULONGEST offset, LONGEST len)
1051 unsigned int total_len;
1053 struct inferior_list_entry *dll_ptr;
1055 if (writebuf != NULL)
1058 if (annex[0] != '\0' || !target_running ())
1061 /* Over-estimate the necessary memory. Assume that every character
1062 in the library name must be escaped. */
1064 for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next)
1065 total_len += 128 + 6 * strlen (((struct dll_info *) dll_ptr)->name);
1067 document = malloc (total_len);
1068 if (document == NULL)
1071 strcpy (document, "<library-list>\n");
1072 p = document + strlen (document);
1074 for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next)
1076 struct dll_info *dll = (struct dll_info *) dll_ptr;
1079 strcpy (p, " <library name=\"");
1081 name = xml_escape_text (dll->name);
1085 strcpy (p, "\"><segment address=\"");
1087 sprintf (p, "0x%lx", (long) dll->base_addr);
1089 strcpy (p, "\"/></library>\n");
1093 strcpy (p, "</library-list>\n");
1095 total_len = strlen (document);
1097 if (offset > total_len)
1103 if (offset + len > total_len)
1104 len = total_len - offset;
1106 memcpy (readbuf, document + offset, len);
1111 /* Handle qXfer:libraries-svr4:read. */
1114 handle_qxfer_libraries_svr4 (const char *annex,
1115 gdb_byte *readbuf, const gdb_byte *writebuf,
1116 ULONGEST offset, LONGEST len)
1118 if (writebuf != NULL)
1121 if (!target_running () || the_target->qxfer_libraries_svr4 == NULL)
1124 return the_target->qxfer_libraries_svr4 (annex, readbuf, writebuf, offset, len);
1127 /* Handle qXfer:osadata:read. */
1130 handle_qxfer_osdata (const char *annex,
1131 gdb_byte *readbuf, const gdb_byte *writebuf,
1132 ULONGEST offset, LONGEST len)
1134 if (the_target->qxfer_osdata == NULL || writebuf != NULL)
1137 return (*the_target->qxfer_osdata) (annex, readbuf, NULL, offset, len);
1140 /* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
1143 handle_qxfer_siginfo (const char *annex,
1144 gdb_byte *readbuf, const gdb_byte *writebuf,
1145 ULONGEST offset, LONGEST len)
1147 if (the_target->qxfer_siginfo == NULL)
1150 if (annex[0] != '\0' || !target_running ())
1153 return (*the_target->qxfer_siginfo) (annex, readbuf, writebuf, offset, len);
1156 /* Handle qXfer:spu:read and qXfer:spu:write. */
1159 handle_qxfer_spu (const char *annex,
1160 gdb_byte *readbuf, const gdb_byte *writebuf,
1161 ULONGEST offset, LONGEST len)
1163 if (the_target->qxfer_spu == NULL)
1166 if (!target_running ())
1169 return (*the_target->qxfer_spu) (annex, readbuf, writebuf, offset, len);
1172 /* Handle qXfer:statictrace:read. */
1175 handle_qxfer_statictrace (const char *annex,
1176 gdb_byte *readbuf, const gdb_byte *writebuf,
1177 ULONGEST offset, LONGEST len)
1181 if (writebuf != NULL)
1184 if (annex[0] != '\0' || !target_running () || current_traceframe == -1)
1187 if (traceframe_read_sdata (current_traceframe, offset,
1188 readbuf, len, &nbytes))
1193 /* Helper for handle_qxfer_threads. */
1196 handle_qxfer_threads_proper (struct buffer *buffer)
1198 struct inferior_list_entry *thread;
1200 buffer_grow_str (buffer, "<threads>\n");
1202 for (thread = all_threads.head; thread; thread = thread->next)
1204 ptid_t ptid = thread_to_gdb_id ((struct thread_info *)thread);
1206 int core = target_core_of_thread (ptid);
1209 write_ptid (ptid_s, ptid);
1213 sprintf (core_s, "%d", core);
1214 buffer_xml_printf (buffer, "<thread id=\"%s\" core=\"%s\"/>\n",
1219 buffer_xml_printf (buffer, "<thread id=\"%s\"/>\n",
1224 buffer_grow_str0 (buffer, "</threads>\n");
1227 /* Handle qXfer:threads:read. */
1230 handle_qxfer_threads (const char *annex,
1231 gdb_byte *readbuf, const gdb_byte *writebuf,
1232 ULONGEST offset, LONGEST len)
1234 static char *result = 0;
1235 static unsigned int result_length = 0;
1237 if (writebuf != NULL)
1240 if (!target_running () || annex[0] != '\0')
1245 struct buffer buffer;
1246 /* When asked for data at offset 0, generate everything and store into
1247 'result'. Successive reads will be served off 'result'. */
1251 buffer_init (&buffer);
1253 handle_qxfer_threads_proper (&buffer);
1255 result = buffer_finish (&buffer);
1256 result_length = strlen (result);
1257 buffer_free (&buffer);
1260 if (offset >= result_length)
1262 /* We're out of data. */
1269 if (len > result_length - offset)
1270 len = result_length - offset;
1272 memcpy (readbuf, result + offset, len);
1277 /* Handle qXfer:traceframe-info:read. */
1280 handle_qxfer_traceframe_info (const char *annex,
1281 gdb_byte *readbuf, const gdb_byte *writebuf,
1282 ULONGEST offset, LONGEST len)
1284 static char *result = 0;
1285 static unsigned int result_length = 0;
1287 if (writebuf != NULL)
1290 if (!target_running () || annex[0] != '\0' || current_traceframe == -1)
1295 struct buffer buffer;
1297 /* When asked for data at offset 0, generate everything and
1298 store into 'result'. Successive reads will be served off
1302 buffer_init (&buffer);
1304 traceframe_read_info (current_traceframe, &buffer);
1306 result = buffer_finish (&buffer);
1307 result_length = strlen (result);
1308 buffer_free (&buffer);
1311 if (offset >= result_length)
1313 /* We're out of data. */
1320 if (len > result_length - offset)
1321 len = result_length - offset;
1323 memcpy (readbuf, result + offset, len);
1327 /* Handle qXfer:fdpic:read. */
1330 handle_qxfer_fdpic (const char *annex, gdb_byte *readbuf,
1331 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1333 if (the_target->read_loadmap == NULL)
1336 if (!target_running ())
1339 return (*the_target->read_loadmap) (annex, offset, readbuf, len);
1342 /* Handle qXfer:btrace:read. */
1345 handle_qxfer_btrace (const char *annex,
1346 gdb_byte *readbuf, const gdb_byte *writebuf,
1347 ULONGEST offset, LONGEST len)
1349 static struct buffer cache;
1350 struct thread_info *thread;
1353 if (the_target->read_btrace == NULL || writebuf != NULL)
1356 if (!target_running ())
1359 if (ptid_equal (general_thread, null_ptid)
1360 || ptid_equal (general_thread, minus_one_ptid))
1362 strcpy (own_buf, "E.Must select a single thread.");
1366 thread = find_thread_ptid (general_thread);
1369 strcpy (own_buf, "E.No such thread.");
1373 if (thread->btrace == NULL)
1375 strcpy (own_buf, "E.Btrace not enabled.");
1379 if (strcmp (annex, "all") == 0)
1380 type = btrace_read_all;
1381 else if (strcmp (annex, "new") == 0)
1382 type = btrace_read_new;
1385 strcpy (own_buf, "E.Bad annex.");
1391 buffer_free (&cache);
1393 target_read_btrace (thread->btrace, &cache, type);
1395 else if (offset > cache.used_size)
1397 buffer_free (&cache);
1401 if (len > cache.used_size - offset)
1402 len = cache.used_size - offset;
1404 memcpy (readbuf, cache.buffer + offset, len);
1409 static const struct qxfer qxfer_packets[] =
1411 { "auxv", handle_qxfer_auxv },
1412 { "btrace", handle_qxfer_btrace },
1413 { "fdpic", handle_qxfer_fdpic},
1414 { "features", handle_qxfer_features },
1415 { "libraries", handle_qxfer_libraries },
1416 { "libraries-svr4", handle_qxfer_libraries_svr4 },
1417 { "osdata", handle_qxfer_osdata },
1418 { "siginfo", handle_qxfer_siginfo },
1419 { "spu", handle_qxfer_spu },
1420 { "statictrace", handle_qxfer_statictrace },
1421 { "threads", handle_qxfer_threads },
1422 { "traceframe-info", handle_qxfer_traceframe_info },
1426 handle_qxfer (char *own_buf, int packet_len, int *new_packet_len_p)
1434 if (strncmp (own_buf, "qXfer:", 6) != 0)
1437 /* Grab the object, r/w and annex. */
1438 if (decode_xfer (own_buf + 6, &object, &rw, &annex, &offset) < 0)
1440 write_enn (own_buf);
1445 i < sizeof (qxfer_packets) / sizeof (qxfer_packets[0]);
1448 const struct qxfer *q = &qxfer_packets[i];
1450 if (strcmp (object, q->object) == 0)
1452 if (strcmp (rw, "read") == 0)
1454 unsigned char *data;
1459 /* Grab the offset and length. */
1460 if (decode_xfer_read (offset, &ofs, &len) < 0)
1462 write_enn (own_buf);
1466 /* Read one extra byte, as an indicator of whether there is
1468 if (len > PBUFSIZ - 2)
1470 data = malloc (len + 1);
1473 write_enn (own_buf);
1476 n = (*q->xfer) (annex, data, NULL, ofs, len + 1);
1484 /* Preserve error message. */
1487 write_enn (own_buf);
1489 *new_packet_len_p = write_qxfer_response (own_buf, data, len, 1);
1491 *new_packet_len_p = write_qxfer_response (own_buf, data, n, 0);
1496 else if (strcmp (rw, "write") == 0)
1501 unsigned char *data;
1503 strcpy (own_buf, "E00");
1504 data = malloc (packet_len - (offset - own_buf));
1507 write_enn (own_buf);
1510 if (decode_xfer_write (offset, packet_len - (offset - own_buf),
1511 &ofs, &len, data) < 0)
1514 write_enn (own_buf);
1518 n = (*q->xfer) (annex, NULL, data, ofs, len);
1526 /* Preserve error message. */
1529 write_enn (own_buf);
1531 sprintf (own_buf, "%x", n);
1544 /* Table used by the crc32 function to calcuate the checksum. */
1546 static unsigned int crc32_table[256] =
1549 /* Compute 32 bit CRC from inferior memory.
1551 On success, return 32 bit CRC.
1552 On failure, return (unsigned long long) -1. */
1554 static unsigned long long
1555 crc32 (CORE_ADDR base, int len, unsigned int crc)
1557 if (!crc32_table[1])
1559 /* Initialize the CRC table and the decoding table. */
1563 for (i = 0; i < 256; i++)
1565 for (c = i << 24, j = 8; j > 0; --j)
1566 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
1573 unsigned char byte = 0;
1575 /* Return failure if memory read fails. */
1576 if (read_inferior_memory (base, &byte, 1) != 0)
1577 return (unsigned long long) -1;
1579 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ byte) & 255];
1582 return (unsigned long long) crc;
1585 /* Handle all of the extended 'q' packets. */
1588 handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
1590 static struct inferior_list_entry *thread_ptr;
1592 /* Reply the current thread id. */
1593 if (strcmp ("qC", own_buf) == 0 && !disable_packet_qC)
1596 require_running (own_buf);
1598 if (!ptid_equal (general_thread, null_ptid)
1599 && !ptid_equal (general_thread, minus_one_ptid))
1600 gdb_id = general_thread;
1603 thread_ptr = all_threads.head;
1604 gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
1607 sprintf (own_buf, "QC");
1609 write_ptid (own_buf, gdb_id);
1613 if (strcmp ("qSymbol::", own_buf) == 0)
1615 /* GDB is suggesting new symbols have been loaded. This may
1616 mean a new shared library has been detected as loaded, so
1617 take the opportunity to check if breakpoints we think are
1618 inserted, still are. Note that it isn't guaranteed that
1619 we'll see this when a shared library is loaded, and nor will
1620 we see this for unloads (although breakpoints in unloaded
1621 libraries shouldn't trigger), as GDB may not find symbols for
1622 the library at all. We also re-validate breakpoints when we
1623 see a second GDB breakpoint for the same address, and or when
1624 we access breakpoint shadows. */
1625 validate_breakpoints ();
1627 if (target_supports_tracepoints ())
1628 tracepoint_look_up_symbols ();
1630 if (target_running () && the_target->look_up_symbols != NULL)
1631 (*the_target->look_up_symbols) ();
1633 strcpy (own_buf, "OK");
1637 if (!disable_packet_qfThreadInfo)
1639 if (strcmp ("qfThreadInfo", own_buf) == 0)
1643 require_running (own_buf);
1644 thread_ptr = all_threads.head;
1647 gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
1648 write_ptid (own_buf, gdb_id);
1649 thread_ptr = thread_ptr->next;
1653 if (strcmp ("qsThreadInfo", own_buf) == 0)
1657 require_running (own_buf);
1658 if (thread_ptr != NULL)
1661 gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
1662 write_ptid (own_buf, gdb_id);
1663 thread_ptr = thread_ptr->next;
1668 sprintf (own_buf, "l");
1674 if (the_target->read_offsets != NULL
1675 && strcmp ("qOffsets", own_buf) == 0)
1677 CORE_ADDR text, data;
1679 require_running (own_buf);
1680 if (the_target->read_offsets (&text, &data))
1681 sprintf (own_buf, "Text=%lX;Data=%lX;Bss=%lX",
1682 (long)text, (long)data, (long)data);
1684 write_enn (own_buf);
1689 /* Protocol features query. */
1690 if (strncmp ("qSupported", own_buf, 10) == 0
1691 && (own_buf[10] == ':' || own_buf[10] == '\0'))
1693 char *p = &own_buf[10];
1694 int gdb_supports_qRelocInsn = 0;
1696 /* Start processing qSupported packet. */
1697 target_process_qsupported (NULL);
1699 /* Process each feature being provided by GDB. The first
1700 feature will follow a ':', and latter features will follow
1704 char **qsupported = NULL;
1708 /* Two passes, to avoid nested strtok calls in
1709 target_process_qsupported. */
1710 for (p = strtok (p + 1, ";");
1712 p = strtok (NULL, ";"))
1715 qsupported = xrealloc (qsupported, count * sizeof (char *));
1716 qsupported[count - 1] = xstrdup (p);
1719 for (i = 0; i < count; i++)
1722 if (strcmp (p, "multiprocess+") == 0)
1724 /* GDB supports and wants multi-process support if
1726 if (target_supports_multi_process ())
1729 else if (strcmp (p, "qRelocInsn+") == 0)
1731 /* GDB supports relocate instruction requests. */
1732 gdb_supports_qRelocInsn = 1;
1735 target_process_qsupported (p);
1744 "PacketSize=%x;QPassSignals+;QProgramSignals+",
1747 if (the_target->qxfer_libraries_svr4 != NULL)
1748 strcat (own_buf, ";qXfer:libraries-svr4:read+"
1749 ";augmented-libraries-svr4-read+");
1752 /* We do not have any hook to indicate whether the non-SVR4 target
1753 backend supports qXfer:libraries:read, so always report it. */
1754 strcat (own_buf, ";qXfer:libraries:read+");
1757 if (the_target->read_auxv != NULL)
1758 strcat (own_buf, ";qXfer:auxv:read+");
1760 if (the_target->qxfer_spu != NULL)
1761 strcat (own_buf, ";qXfer:spu:read+;qXfer:spu:write+");
1763 if (the_target->qxfer_siginfo != NULL)
1764 strcat (own_buf, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
1766 if (the_target->read_loadmap != NULL)
1767 strcat (own_buf, ";qXfer:fdpic:read+");
1769 /* We always report qXfer:features:read, as targets may
1770 install XML files on a subsequent call to arch_setup.
1771 If we reported to GDB on startup that we don't support
1772 qXfer:feature:read at all, we will never be re-queried. */
1773 strcat (own_buf, ";qXfer:features:read+");
1775 if (transport_is_reliable)
1776 strcat (own_buf, ";QStartNoAckMode+");
1778 if (the_target->qxfer_osdata != NULL)
1779 strcat (own_buf, ";qXfer:osdata:read+");
1781 if (target_supports_multi_process ())
1782 strcat (own_buf, ";multiprocess+");
1784 if (target_supports_non_stop ())
1785 strcat (own_buf, ";QNonStop+");
1787 if (target_supports_disable_randomization ())
1788 strcat (own_buf, ";QDisableRandomization+");
1790 strcat (own_buf, ";qXfer:threads:read+");
1792 if (target_supports_tracepoints ())
1794 strcat (own_buf, ";ConditionalTracepoints+");
1795 strcat (own_buf, ";TraceStateVariables+");
1796 strcat (own_buf, ";TracepointSource+");
1797 strcat (own_buf, ";DisconnectedTracing+");
1798 if (gdb_supports_qRelocInsn && target_supports_fast_tracepoints ())
1799 strcat (own_buf, ";FastTracepoints+");
1800 strcat (own_buf, ";StaticTracepoints+");
1801 strcat (own_buf, ";InstallInTrace+");
1802 strcat (own_buf, ";qXfer:statictrace:read+");
1803 strcat (own_buf, ";qXfer:traceframe-info:read+");
1804 strcat (own_buf, ";EnableDisableTracepoints+");
1805 strcat (own_buf, ";QTBuffer:size+");
1806 strcat (own_buf, ";tracenz+");
1809 /* Support target-side breakpoint conditions and commands. */
1810 strcat (own_buf, ";ConditionalBreakpoints+");
1811 strcat (own_buf, ";BreakpointCommands+");
1813 if (target_supports_agent ())
1814 strcat (own_buf, ";QAgent+");
1816 if (target_supports_btrace ())
1818 strcat (own_buf, ";Qbtrace:bts+");
1819 strcat (own_buf, ";Qbtrace:off+");
1820 strcat (own_buf, ";qXfer:btrace:read+");
1826 /* Thread-local storage support. */
1827 if (the_target->get_tls_address != NULL
1828 && strncmp ("qGetTLSAddr:", own_buf, 12) == 0)
1830 char *p = own_buf + 12;
1831 CORE_ADDR parts[2], address = 0;
1833 ptid_t ptid = null_ptid;
1835 require_running (own_buf);
1837 for (i = 0; i < 3; i++)
1845 p2 = strchr (p, ',');
1858 ptid = read_ptid (p, NULL);
1860 decode_address (&parts[i - 1], p, len);
1864 if (p != NULL || i < 3)
1868 struct thread_info *thread = find_thread_ptid (ptid);
1873 err = the_target->get_tls_address (thread, parts[0], parts[1],
1879 strcpy (own_buf, paddress(address));
1884 write_enn (own_buf);
1888 /* Otherwise, pretend we do not understand this packet. */
1891 /* Windows OS Thread Information Block address support. */
1892 if (the_target->get_tib_address != NULL
1893 && strncmp ("qGetTIBAddr:", own_buf, 12) == 0)
1898 ptid_t ptid = read_ptid (own_buf + 12, &annex);
1900 n = (*the_target->get_tib_address) (ptid, &tlb);
1903 strcpy (own_buf, paddress(tlb));
1908 write_enn (own_buf);
1914 /* Handle "monitor" commands. */
1915 if (strncmp ("qRcmd,", own_buf, 6) == 0)
1917 char *mon = malloc (PBUFSIZ);
1918 int len = strlen (own_buf + 6);
1922 write_enn (own_buf);
1926 if ((len % 2) != 0 || unhexify (mon, own_buf + 6, len / 2) != len / 2)
1928 write_enn (own_buf);
1932 mon[len / 2] = '\0';
1936 if (the_target->handle_monitor_command == NULL
1937 || (*the_target->handle_monitor_command) (mon) == 0)
1938 /* Default processing. */
1939 handle_monitor_command (mon, own_buf);
1945 if (strncmp ("qSearch:memory:", own_buf,
1946 sizeof ("qSearch:memory:") - 1) == 0)
1948 require_running (own_buf);
1949 handle_search_memory (own_buf, packet_len);
1953 if (strcmp (own_buf, "qAttached") == 0
1954 || strncmp (own_buf, "qAttached:", sizeof ("qAttached:") - 1) == 0)
1956 struct process_info *process;
1958 if (own_buf[sizeof ("qAttached") - 1])
1960 int pid = strtoul (own_buf + sizeof ("qAttached:") - 1, NULL, 16);
1961 process = (struct process_info *)
1962 find_inferior_id (&all_processes, pid_to_ptid (pid));
1966 require_running (own_buf);
1967 process = current_process ();
1970 if (process == NULL)
1972 write_enn (own_buf);
1976 strcpy (own_buf, process->attached ? "1" : "0");
1980 if (strncmp ("qCRC:", own_buf, 5) == 0)
1982 /* CRC check (compare-section). */
1986 unsigned long long crc;
1988 require_running (own_buf);
1989 comma = unpack_varlen_hex (own_buf + 5, &base);
1990 if (*comma++ != ',')
1992 write_enn (own_buf);
1995 len = strtoul (comma, NULL, 16);
1996 crc = crc32 (base, len, 0xffffffff);
1997 /* Check for memory failure. */
1998 if (crc == (unsigned long long) -1)
2000 write_enn (own_buf);
2003 sprintf (own_buf, "C%lx", (unsigned long) crc);
2007 if (handle_qxfer (own_buf, packet_len, new_packet_len_p))
2010 if (target_supports_tracepoints () && handle_tracepoint_query (own_buf))
2013 /* Otherwise we didn't know what packet it was. Say we didn't
2018 static void gdb_wants_all_threads_stopped (void);
2020 /* Parse vCont packets. */
2022 handle_v_cont (char *own_buf)
2026 struct thread_resume *resume_info;
2027 struct thread_resume default_action = {{0}};
2029 /* Count the number of semicolons in the packet. There should be one
2030 for every action. */
2036 p = strchr (p, ';');
2039 resume_info = malloc (n * sizeof (resume_info[0]));
2040 if (resume_info == NULL)
2048 memset (&resume_info[i], 0, sizeof resume_info[i]);
2050 if (p[0] == 's' || p[0] == 'S')
2051 resume_info[i].kind = resume_step;
2052 else if (p[0] == 'r')
2053 resume_info[i].kind = resume_step;
2054 else if (p[0] == 'c' || p[0] == 'C')
2055 resume_info[i].kind = resume_continue;
2056 else if (p[0] == 't')
2057 resume_info[i].kind = resume_stop;
2061 if (p[0] == 'S' || p[0] == 'C')
2064 sig = strtol (p + 1, &q, 16);
2069 if (!gdb_signal_to_host_p (sig))
2071 resume_info[i].sig = gdb_signal_to_host (sig);
2073 else if (p[0] == 'r')
2077 p = unpack_varlen_hex (p + 1, &addr);
2078 resume_info[i].step_range_start = addr;
2083 p = unpack_varlen_hex (p + 1, &addr);
2084 resume_info[i].step_range_end = addr;
2093 resume_info[i].thread = minus_one_ptid;
2094 default_action = resume_info[i];
2096 /* Note: we don't increment i here, we'll overwrite this entry
2097 the next time through. */
2099 else if (p[0] == ':')
2101 ptid_t ptid = read_ptid (p + 1, &q);
2106 if (p[0] != ';' && p[0] != 0)
2109 resume_info[i].thread = ptid;
2116 resume_info[i] = default_action;
2118 /* `cont_thread' is still used in occasional places in the backend,
2119 to implement single-thread scheduler-locking. Doesn't make sense
2120 to set it if we see a stop request, or a wildcard action (one
2121 with '-1' (all threads), or 'pPID.-1' (all threads of PID)). */
2123 && !(ptid_equal (resume_info[0].thread, minus_one_ptid)
2124 || ptid_get_lwp (resume_info[0].thread) == -1)
2125 && resume_info[0].kind != resume_stop)
2126 cont_thread = resume_info[0].thread;
2128 cont_thread = minus_one_ptid;
2129 set_desired_inferior (0);
2134 (*the_target->resume) (resume_info, n);
2142 last_ptid = mywait (minus_one_ptid, &last_status, 0, 1);
2144 if (last_status.kind != TARGET_WAITKIND_EXITED
2145 && last_status.kind != TARGET_WAITKIND_SIGNALLED)
2146 current_inferior->last_status = last_status;
2148 /* From the client's perspective, all-stop mode always stops all
2149 threads implicitly (and the target backend has already done
2150 so by now). Tag all threads as "want-stopped", so we don't
2151 resume them implicitly without the client telling us to. */
2152 gdb_wants_all_threads_stopped ();
2153 prepare_resume_reply (own_buf, last_ptid, &last_status);
2154 disable_async_io ();
2156 if (last_status.kind == TARGET_WAITKIND_EXITED
2157 || last_status.kind == TARGET_WAITKIND_SIGNALLED)
2158 mourn_inferior (find_process_pid (ptid_get_pid (last_ptid)));
2163 write_enn (own_buf);
2168 /* Attach to a new program. Return 1 if successful, 0 if failure. */
2170 handle_v_attach (char *own_buf)
2174 pid = strtol (own_buf + 8, NULL, 16);
2175 if (pid != 0 && attach_inferior (pid) == 0)
2177 /* Don't report shared library events after attaching, even if
2178 some libraries are preloaded. GDB will always poll the
2179 library list. Avoids the "stopped by shared library event"
2180 notice on the GDB side. */
2185 /* In non-stop, we don't send a resume reply. Stop events
2186 will follow up using the normal notification
2191 prepare_resume_reply (own_buf, last_ptid, &last_status);
2197 write_enn (own_buf);
2202 /* Run a new program. Return 1 if successful, 0 if failure. */
2204 handle_v_run (char *own_buf)
2206 char *p, *next_p, **new_argv;
2210 for (p = own_buf + strlen ("vRun;"); p && *p; p = strchr (p, ';'))
2216 new_argv = calloc (new_argc + 2, sizeof (char *));
2217 if (new_argv == NULL)
2219 write_enn (own_buf);
2224 for (p = own_buf + strlen ("vRun;"); *p; p = next_p)
2226 next_p = strchr (p, ';');
2228 next_p = p + strlen (p);
2230 if (i == 0 && p == next_p)
2234 /* FIXME: Fail request if out of memory instead of dying. */
2235 new_argv[i] = xmalloc (1 + (next_p - p) / 2);
2236 unhexify (new_argv[i], p, (next_p - p) / 2);
2237 new_argv[i][(next_p - p) / 2] = '\0';
2246 if (new_argv[0] == NULL)
2248 /* GDB didn't specify a program to run. Use the program from the
2249 last run with the new argument list. */
2251 if (program_argv == NULL)
2253 write_enn (own_buf);
2254 freeargv (new_argv);
2258 new_argv[0] = strdup (program_argv[0]);
2259 if (new_argv[0] == NULL)
2261 write_enn (own_buf);
2262 freeargv (new_argv);
2267 /* Free the old argv and install the new one. */
2268 freeargv (program_argv);
2269 program_argv = new_argv;
2271 start_inferior (program_argv);
2272 if (last_status.kind == TARGET_WAITKIND_STOPPED)
2274 prepare_resume_reply (own_buf, last_ptid, &last_status);
2276 /* In non-stop, sending a resume reply doesn't set the general
2277 thread, but GDB assumes a vRun sets it (this is so GDB can
2278 query which is the main thread of the new inferior. */
2280 general_thread = last_ptid;
2286 write_enn (own_buf);
2291 /* Kill process. Return 1 if successful, 0 if failure. */
2293 handle_v_kill (char *own_buf)
2296 char *p = &own_buf[6];
2298 pid = strtol (p, NULL, 16);
2301 if (pid != 0 && kill_inferior (pid) == 0)
2303 last_status.kind = TARGET_WAITKIND_SIGNALLED;
2304 last_status.value.sig = GDB_SIGNAL_KILL;
2305 last_ptid = pid_to_ptid (pid);
2306 discard_queued_stop_replies (pid);
2312 write_enn (own_buf);
2317 /* Handle all of the extended 'v' packets. */
2319 handle_v_requests (char *own_buf, int packet_len, int *new_packet_len)
2321 if (!disable_packet_vCont)
2323 if (strncmp (own_buf, "vCont;", 6) == 0)
2325 require_running (own_buf);
2326 handle_v_cont (own_buf);
2330 if (strncmp (own_buf, "vCont?", 6) == 0)
2332 strcpy (own_buf, "vCont;c;C;s;S;t");
2333 if (target_supports_range_stepping ())
2335 own_buf = own_buf + strlen (own_buf);
2336 strcpy (own_buf, ";r");
2342 if (strncmp (own_buf, "vFile:", 6) == 0
2343 && handle_vFile (own_buf, packet_len, new_packet_len))
2346 if (strncmp (own_buf, "vAttach;", 8) == 0)
2348 if ((!extended_protocol || !multi_process) && target_running ())
2350 fprintf (stderr, "Already debugging a process\n");
2351 write_enn (own_buf);
2354 handle_v_attach (own_buf);
2358 if (strncmp (own_buf, "vRun;", 5) == 0)
2360 if ((!extended_protocol || !multi_process) && target_running ())
2362 fprintf (stderr, "Already debugging a process\n");
2363 write_enn (own_buf);
2366 handle_v_run (own_buf);
2370 if (strncmp (own_buf, "vKill;", 6) == 0)
2372 if (!target_running ())
2374 fprintf (stderr, "No process to kill\n");
2375 write_enn (own_buf);
2378 handle_v_kill (own_buf);
2382 if (handle_notif_ack (own_buf, packet_len))
2385 /* Otherwise we didn't know what packet it was. Say we didn't
2391 /* Resume inferior and wait for another event. In non-stop mode,
2392 don't really wait here, but return immediatelly to the event
2395 myresume (char *own_buf, int step, int sig)
2397 struct thread_resume resume_info[2];
2399 int valid_cont_thread;
2401 set_desired_inferior (0);
2403 valid_cont_thread = (!ptid_equal (cont_thread, null_ptid)
2404 && !ptid_equal (cont_thread, minus_one_ptid));
2406 if (step || sig || valid_cont_thread)
2408 resume_info[0].thread = current_ptid;
2410 resume_info[0].kind = resume_step;
2412 resume_info[0].kind = resume_continue;
2413 resume_info[0].sig = sig;
2417 if (!valid_cont_thread)
2419 resume_info[n].thread = minus_one_ptid;
2420 resume_info[n].kind = resume_continue;
2421 resume_info[n].sig = 0;
2428 (*the_target->resume) (resume_info, n);
2434 last_ptid = mywait (minus_one_ptid, &last_status, 0, 1);
2436 if (last_status.kind != TARGET_WAITKIND_EXITED
2437 && last_status.kind != TARGET_WAITKIND_SIGNALLED)
2439 current_inferior->last_resume_kind = resume_stop;
2440 current_inferior->last_status = last_status;
2443 prepare_resume_reply (own_buf, last_ptid, &last_status);
2444 disable_async_io ();
2446 if (last_status.kind == TARGET_WAITKIND_EXITED
2447 || last_status.kind == TARGET_WAITKIND_SIGNALLED)
2448 mourn_inferior (find_process_pid (ptid_get_pid (last_ptid)));
2452 /* Callback for for_each_inferior. Make a new stop reply for each
2456 queue_stop_reply_callback (struct inferior_list_entry *entry, void *arg)
2458 struct thread_info *thread = (struct thread_info *) entry;
2460 /* For now, assume targets that don't have this callback also don't
2461 manage the thread's last_status field. */
2462 if (the_target->thread_stopped == NULL)
2464 struct vstop_notif *new_notif = xmalloc (sizeof (*new_notif));
2466 new_notif->ptid = entry->id;
2467 new_notif->status = thread->last_status;
2468 /* Pass the last stop reply back to GDB, but don't notify
2470 notif_event_enque (¬if_stop,
2471 (struct notif_event *) new_notif);
2475 if (thread_stopped (thread))
2480 = target_waitstatus_to_string (&thread->last_status);
2483 "Reporting thread %s as already stopped with %s\n",
2484 target_pid_to_str (entry->id),
2487 xfree (status_string);
2490 gdb_assert (thread->last_status.kind != TARGET_WAITKIND_IGNORE);
2492 /* Pass the last stop reply back to GDB, but don't notify
2494 queue_stop_reply (entry->id, &thread->last_status);
2501 /* Set this inferior threads's state as "want-stopped". We won't
2502 resume this thread until the client gives us another action for
2506 gdb_wants_thread_stopped (struct inferior_list_entry *entry)
2508 struct thread_info *thread = (struct thread_info *) entry;
2510 thread->last_resume_kind = resume_stop;
2512 if (thread->last_status.kind == TARGET_WAITKIND_IGNORE)
2514 /* Most threads are stopped implicitly (all-stop); tag that with
2516 thread->last_status.kind = TARGET_WAITKIND_STOPPED;
2517 thread->last_status.value.sig = GDB_SIGNAL_0;
2521 /* Set all threads' states as "want-stopped". */
2524 gdb_wants_all_threads_stopped (void)
2526 for_each_inferior (&all_threads, gdb_wants_thread_stopped);
2529 /* Clear the gdb_detached flag of every process. */
2532 gdb_reattached_process (struct inferior_list_entry *entry)
2534 struct process_info *process = (struct process_info *) entry;
2536 process->gdb_detached = 0;
2539 /* Status handler for the '?' packet. */
2542 handle_status (char *own_buf)
2544 /* GDB is connected, don't forward events to the target anymore. */
2545 for_each_inferior (&all_processes, gdb_reattached_process);
2547 /* In non-stop mode, we must send a stop reply for each stopped
2548 thread. In all-stop mode, just send one for the first stopped
2553 discard_queued_stop_replies (-1);
2554 find_inferior (&all_threads, queue_stop_reply_callback, NULL);
2556 /* The first is sent immediatly. OK is sent if there is no
2557 stopped thread, which is the same handling of the vStopped
2558 packet (by design). */
2559 notif_write_event (¬if_stop, own_buf);
2564 stabilize_threads ();
2565 gdb_wants_all_threads_stopped ();
2567 if (all_threads.head)
2569 struct target_waitstatus status;
2571 status.kind = TARGET_WAITKIND_STOPPED;
2572 status.value.sig = GDB_SIGNAL_TRAP;
2573 prepare_resume_reply (own_buf,
2574 all_threads.head->id, &status);
2577 strcpy (own_buf, "W00");
2582 gdbserver_version (void)
2584 printf ("GNU gdbserver %s%s\n"
2585 "Copyright (C) 2013 Free Software Foundation, Inc.\n"
2586 "gdbserver is free software, covered by the "
2587 "GNU General Public License.\n"
2588 "This gdbserver was configured as \"%s\"\n",
2589 PKGVERSION, version, host_name);
2593 gdbserver_usage (FILE *stream)
2595 fprintf (stream, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
2596 "\tgdbserver [OPTIONS] --attach COMM PID\n"
2597 "\tgdbserver [OPTIONS] --multi COMM\n"
2599 "COMM may either be a tty device (for serial debugging), or \n"
2600 "HOST:PORT to listen for a TCP connection.\n"
2603 " --debug Enable general debugging output.\n"
2604 " --remote-debug Enable remote protocol debugging output.\n"
2605 " --version Display version information and exit.\n"
2606 " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n"
2607 " --once Exit after the first connection has "
2609 if (REPORT_BUGS_TO[0] && stream == stdout)
2610 fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO);
2614 gdbserver_show_disableable (FILE *stream)
2616 fprintf (stream, "Disableable packets:\n"
2617 " vCont \tAll vCont packets\n"
2618 " qC \tQuerying the current thread\n"
2619 " qfThreadInfo\tThread listing\n"
2620 " Tthread \tPassing the thread specifier in the "
2621 "T stop reply packet\n"
2622 " threads \tAll of the above\n");
2626 #undef require_running
2627 #define require_running(BUF) \
2628 if (!target_running ()) \
2635 first_thread_of (struct inferior_list_entry *entry, void *args)
2637 int pid = * (int *) args;
2639 if (ptid_get_pid (entry->id) == pid)
2646 kill_inferior_callback (struct inferior_list_entry *entry)
2648 struct process_info *process = (struct process_info *) entry;
2649 int pid = ptid_get_pid (process->head.id);
2651 kill_inferior (pid);
2652 discard_queued_stop_replies (pid);
2655 /* Callback for for_each_inferior to detach or kill the inferior,
2656 depending on whether we attached to it or not.
2657 We inform the user whether we're detaching or killing the process
2658 as this is only called when gdbserver is about to exit. */
2661 detach_or_kill_inferior_callback (struct inferior_list_entry *entry)
2663 struct process_info *process = (struct process_info *) entry;
2664 int pid = ptid_get_pid (process->head.id);
2666 if (process->attached)
2667 detach_inferior (pid);
2669 kill_inferior (pid);
2671 discard_queued_stop_replies (pid);
2674 /* for_each_inferior callback for detach_or_kill_for_exit to print
2675 the pids of started inferiors. */
2678 print_started_pid (struct inferior_list_entry *entry)
2680 struct process_info *process = (struct process_info *) entry;
2682 if (! process->attached)
2684 int pid = ptid_get_pid (process->head.id);
2685 fprintf (stderr, " %d", pid);
2689 /* for_each_inferior callback for detach_or_kill_for_exit to print
2690 the pids of attached inferiors. */
2693 print_attached_pid (struct inferior_list_entry *entry)
2695 struct process_info *process = (struct process_info *) entry;
2697 if (process->attached)
2699 int pid = ptid_get_pid (process->head.id);
2700 fprintf (stderr, " %d", pid);
2704 /* Call this when exiting gdbserver with possible inferiors that need
2705 to be killed or detached from. */
2708 detach_or_kill_for_exit (void)
2710 /* First print a list of the inferiors we will be killing/detaching.
2711 This is to assist the user, for example, in case the inferior unexpectedly
2712 dies after we exit: did we screw up or did the inferior exit on its own?
2713 Having this info will save some head-scratching. */
2715 if (have_started_inferiors_p ())
2717 fprintf (stderr, "Killing process(es):");
2718 for_each_inferior (&all_processes, print_started_pid);
2719 fprintf (stderr, "\n");
2721 if (have_attached_inferiors_p ())
2723 fprintf (stderr, "Detaching process(es):");
2724 for_each_inferior (&all_processes, print_attached_pid);
2725 fprintf (stderr, "\n");
2728 /* Now we can kill or detach the inferiors. */
2730 for_each_inferior (&all_processes, detach_or_kill_inferior_callback);
2734 main (int argc, char *argv[])
2738 char *arg_end, *port;
2739 char **next_arg = &argv[1];
2740 volatile int multi_mode = 0;
2741 volatile int attach = 0;
2744 while (*next_arg != NULL && **next_arg == '-')
2746 if (strcmp (*next_arg, "--version") == 0)
2748 gdbserver_version ();
2751 else if (strcmp (*next_arg, "--help") == 0)
2753 gdbserver_usage (stdout);
2756 else if (strcmp (*next_arg, "--attach") == 0)
2758 else if (strcmp (*next_arg, "--multi") == 0)
2760 else if (strcmp (*next_arg, "--wrapper") == 0)
2764 wrapper_argv = next_arg;
2765 while (*next_arg != NULL && strcmp (*next_arg, "--") != 0)
2768 if (next_arg == wrapper_argv || *next_arg == NULL)
2770 gdbserver_usage (stderr);
2774 /* Consume the "--". */
2777 else if (strcmp (*next_arg, "--debug") == 0)
2779 else if (strcmp (*next_arg, "--remote-debug") == 0)
2781 else if (strcmp (*next_arg, "--disable-packet") == 0)
2783 gdbserver_show_disableable (stdout);
2786 else if (strncmp (*next_arg,
2787 "--disable-packet=",
2788 sizeof ("--disable-packet=") - 1) == 0)
2790 char *packets, *tok;
2792 packets = *next_arg += sizeof ("--disable-packet=") - 1;
2793 for (tok = strtok (packets, ",");
2795 tok = strtok (NULL, ","))
2797 if (strcmp ("vCont", tok) == 0)
2798 disable_packet_vCont = 1;
2799 else if (strcmp ("Tthread", tok) == 0)
2800 disable_packet_Tthread = 1;
2801 else if (strcmp ("qC", tok) == 0)
2802 disable_packet_qC = 1;
2803 else if (strcmp ("qfThreadInfo", tok) == 0)
2804 disable_packet_qfThreadInfo = 1;
2805 else if (strcmp ("threads", tok) == 0)
2807 disable_packet_vCont = 1;
2808 disable_packet_Tthread = 1;
2809 disable_packet_qC = 1;
2810 disable_packet_qfThreadInfo = 1;
2814 fprintf (stderr, "Don't know how to disable \"%s\".\n\n",
2816 gdbserver_show_disableable (stderr);
2821 else if (strcmp (*next_arg, "-") == 0)
2823 /* "-" specifies a stdio connection and is a form of port
2825 *next_arg = STDIO_CONNECTION_NAME;
2828 else if (strcmp (*next_arg, "--disable-randomization") == 0)
2829 disable_randomization = 1;
2830 else if (strcmp (*next_arg, "--no-disable-randomization") == 0)
2831 disable_randomization = 0;
2832 else if (strcmp (*next_arg, "--once") == 0)
2836 fprintf (stderr, "Unknown argument: %s\n", *next_arg);
2844 if (setjmp (toplevel))
2846 fprintf (stderr, "Exiting\n");
2852 if (port == NULL || (!attach && !multi_mode && *next_arg == NULL))
2854 gdbserver_usage (stderr);
2858 /* Remember stdio descriptors. LISTEN_DESC must not be listed, it will be
2859 opened by remote_prepare. */
2862 /* We need to know whether the remote connection is stdio before
2863 starting the inferior. Inferiors created in this scenario have
2864 stdin,stdout redirected. So do this here before we call
2866 remote_prepare (port);
2871 /* --attach used to come after PORT, so allow it there for
2873 if (*next_arg != NULL && strcmp (*next_arg, "--attach") == 0)
2880 && (*next_arg == NULL
2881 || (*next_arg)[0] == '\0'
2882 || (pid = strtoul (*next_arg, &arg_end, 0)) == 0
2884 || next_arg[1] != NULL))
2889 gdbserver_usage (stderr);
2893 initialize_async_io ();
2895 initialize_event_loop ();
2896 if (target_supports_tracepoints ())
2897 initialize_tracepoint ();
2899 own_buf = xmalloc (PBUFSIZ + 1);
2900 mem_buf = xmalloc (PBUFSIZ);
2902 if (pid == 0 && *next_arg != NULL)
2906 n = argc - (next_arg - argv);
2907 program_argv = xmalloc (sizeof (char *) * (n + 1));
2908 for (i = 0; i < n; i++)
2909 program_argv[i] = xstrdup (next_arg[i]);
2910 program_argv[i] = NULL;
2912 /* Wait till we are at first instruction in program. */
2913 start_inferior (program_argv);
2915 /* We are now (hopefully) stopped at the first instruction of
2916 the target process. This assumes that the target process was
2917 successfully created. */
2921 if (attach_inferior (pid) == -1)
2922 error ("Attaching not supported on this target");
2924 /* Otherwise succeeded. */
2928 last_status.kind = TARGET_WAITKIND_EXITED;
2929 last_status.value.integer = 0;
2930 last_ptid = minus_one_ptid;
2933 initialize_notif ();
2935 /* Don't report shared library events on the initial connection,
2936 even if some libraries are preloaded. Avoids the "stopped by
2937 shared library event" notice on gdb side. */
2940 if (setjmp (toplevel))
2942 /* If something fails and longjmps while detaching or killing
2943 inferiors, we'd end up here again, stuck in an infinite loop
2944 trap. Be sure that if that happens, we exit immediately
2946 if (setjmp (toplevel) == 0)
2947 detach_or_kill_for_exit ();
2949 fprintf (stderr, "Detach or kill failed. Exiting\n");
2953 if (last_status.kind == TARGET_WAITKIND_EXITED
2954 || last_status.kind == TARGET_WAITKIND_SIGNALLED)
2959 if (!was_running && !multi_mode)
2961 fprintf (stderr, "No program to debug. GDBserver exiting.\n");
2969 /* Be sure we're out of tfind mode. */
2970 current_traceframe = -1;
2974 if (setjmp (toplevel) != 0)
2976 /* An error occurred. */
2977 if (response_needed)
2979 write_enn (own_buf);
2984 /* Wait for events. This will return when all event sources are
2985 removed from the event loop. */
2986 start_event_loop ();
2988 /* If an exit was requested (using the "monitor exit" command),
2989 terminate now. The only other way to get here is for
2990 getpkt to fail; close the connection and reopen it at the
2993 if (exit_requested || run_once)
2995 /* If something fails and longjmps while detaching or
2996 killing inferiors, we'd end up here again, stuck in an
2997 infinite loop trap. Be sure that if that happens, we
2998 exit immediately instead. */
2999 if (setjmp (toplevel) == 0)
3001 detach_or_kill_for_exit ();
3006 fprintf (stderr, "Detach or kill failed. Exiting\n");
3012 "Remote side has terminated connection. "
3013 "GDBserver will reopen the connection.\n");
3017 if (disconnected_tracing)
3019 /* Try to enable non-stop/async mode, so we we can both
3020 wait for an async socket accept, and handle async
3021 target events simultaneously. There's also no point
3022 either in having the target always stop all threads,
3023 when we're going to pass signals down without
3027 if (start_non_stop (1))
3030 /* Detaching implicitly resumes all threads; simply
3031 disconnecting does not. */
3037 "Disconnected tracing disabled; stopping trace run.\n");
3044 /* Process options coming from Z packets for *point at address
3045 POINT_ADDR. PACKET is the packet buffer. *PACKET is updated
3046 to point to the first char after the last processed option. */
3049 process_point_options (CORE_ADDR point_addr, char **packet)
3051 char *dataptr = *packet;
3054 /* Check if data has the correct format. */
3055 if (*dataptr != ';')
3062 if (*dataptr == ';')
3065 if (*dataptr == 'X')
3067 /* Conditional expression. */
3069 fprintf (stderr, "Found breakpoint condition.\n");
3070 add_breakpoint_condition (point_addr, &dataptr);
3072 else if (strncmp (dataptr, "cmds:", strlen ("cmds:")) == 0)
3074 dataptr += strlen ("cmds:");
3076 fprintf (stderr, "Found breakpoint commands %s.\n", dataptr);
3077 persist = (*dataptr == '1');
3079 add_breakpoint_commands (point_addr, &dataptr, persist);
3083 fprintf (stderr, "Unknown token %c, ignoring.\n",
3085 /* Skip tokens until we find one that we recognize. */
3086 while (*dataptr && *dataptr != ';')
3093 /* Event loop callback that handles a serial event. The first byte in
3094 the serial buffer gets us here. We expect characters to arrive at
3095 a brisk pace, so we read the rest of the packet with a blocking
3099 process_serial_event (void)
3110 int new_packet_len = -1;
3112 /* Used to decide when gdbserver should exit in
3113 multi-mode/remote. */
3114 static int have_ran = 0;
3117 have_ran = target_running ();
3119 disable_async_io ();
3121 response_needed = 0;
3122 packet_len = getpkt (own_buf);
3123 if (packet_len <= 0)
3126 /* Force an event loop break. */
3129 response_needed = 1;
3136 handle_query (own_buf, packet_len, &new_packet_len);
3139 handle_general_set (own_buf);
3142 require_running (own_buf);
3147 pid = strtol (&own_buf[i], NULL, 16);
3150 pid = ptid_get_pid (current_ptid);
3152 if ((tracing && disconnected_tracing) || any_persistent_commands ())
3154 struct thread_resume resume_info;
3155 struct process_info *process = find_process_pid (pid);
3157 if (process == NULL)
3159 write_enn (own_buf);
3163 if (tracing && disconnected_tracing)
3165 "Disconnected tracing in effect, "
3166 "leaving gdbserver attached to the process\n");
3168 if (any_persistent_commands ())
3170 "Persistent commands are present, "
3171 "leaving gdbserver attached to the process\n");
3173 /* Make sure we're in non-stop/async mode, so we we can both
3174 wait for an async socket accept, and handle async target
3175 events simultaneously. There's also no point either in
3176 having the target stop all threads, when we're going to
3177 pass signals down without informing GDB. */
3181 fprintf (stderr, "Forcing non-stop mode\n");
3187 process->gdb_detached = 1;
3189 /* Detaching implicitly resumes all threads. */
3190 resume_info.thread = minus_one_ptid;
3191 resume_info.kind = resume_continue;
3192 resume_info.sig = 0;
3193 (*the_target->resume) (&resume_info, 1);
3196 break; /* from switch/case */
3199 fprintf (stderr, "Detaching from process %d\n", pid);
3201 if (detach_inferior (pid) != 0)
3202 write_enn (own_buf);
3205 discard_queued_stop_replies (pid);
3208 if (extended_protocol)
3210 /* Treat this like a normal program exit. */
3211 last_status.kind = TARGET_WAITKIND_EXITED;
3212 last_status.value.integer = 0;
3213 last_ptid = pid_to_ptid (pid);
3215 current_inferior = NULL;
3222 /* If we are attached, then we can exit. Otherwise, we
3223 need to hang around doing nothing, until the child is
3225 join_inferior (pid);
3231 extended_protocol = 1;
3235 handle_status (own_buf);
3238 if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's')
3240 ptid_t gdb_id, thread_id;
3243 require_running (own_buf);
3245 gdb_id = read_ptid (&own_buf[2], NULL);
3247 pid = ptid_get_pid (gdb_id);
3249 if (ptid_equal (gdb_id, null_ptid)
3250 || ptid_equal (gdb_id, minus_one_ptid))
3251 thread_id = null_ptid;
3253 && ptid_equal (pid_to_ptid (pid),
3256 struct thread_info *thread =
3257 (struct thread_info *) find_inferior (&all_threads,
3262 write_enn (own_buf);
3266 thread_id = ((struct inferior_list_entry *)thread)->id;
3270 thread_id = gdb_id_to_thread_id (gdb_id);
3271 if (ptid_equal (thread_id, null_ptid))
3273 write_enn (own_buf);
3278 if (own_buf[1] == 'g')
3280 if (ptid_equal (thread_id, null_ptid))
3282 /* GDB is telling us to choose any thread. Check if
3283 the currently selected thread is still valid. If
3284 it is not, select the first available. */
3285 struct thread_info *thread =
3286 (struct thread_info *) find_inferior_id (&all_threads,
3289 thread_id = all_threads.head->id;
3292 general_thread = thread_id;
3293 set_desired_inferior (1);
3295 else if (own_buf[1] == 'c')
3296 cont_thread = thread_id;
3302 /* Silently ignore it so that gdb can extend the protocol
3303 without compatibility headaches. */
3308 require_running (own_buf);
3309 if (current_traceframe >= 0)
3311 struct regcache *regcache
3312 = new_register_cache (current_target_desc ());
3314 if (fetch_traceframe_registers (current_traceframe,
3316 registers_to_string (regcache, own_buf);
3318 write_enn (own_buf);
3319 free_register_cache (regcache);
3323 struct regcache *regcache;
3325 set_desired_inferior (1);
3326 regcache = get_thread_regcache (current_inferior, 1);
3327 registers_to_string (regcache, own_buf);
3331 require_running (own_buf);
3332 if (current_traceframe >= 0)
3333 write_enn (own_buf);
3336 struct regcache *regcache;
3338 set_desired_inferior (1);
3339 regcache = get_thread_regcache (current_inferior, 1);
3340 registers_from_string (regcache, &own_buf[1]);
3345 require_running (own_buf);
3346 decode_m_packet (&own_buf[1], &mem_addr, &len);
3347 res = gdb_read_memory (mem_addr, mem_buf, len);
3349 write_enn (own_buf);
3351 convert_int_to_ascii (mem_buf, own_buf, res);
3354 require_running (own_buf);
3355 decode_M_packet (&own_buf[1], &mem_addr, &len, &mem_buf);
3356 if (gdb_write_memory (mem_addr, mem_buf, len) == 0)
3359 write_enn (own_buf);
3362 require_running (own_buf);
3363 if (decode_X_packet (&own_buf[1], packet_len - 1,
3364 &mem_addr, &len, &mem_buf) < 0
3365 || gdb_write_memory (mem_addr, mem_buf, len) != 0)
3366 write_enn (own_buf);
3371 require_running (own_buf);
3372 convert_ascii_to_int (own_buf + 1, &sig, 1);
3373 if (gdb_signal_to_host_p (sig))
3374 signal = gdb_signal_to_host (sig);
3377 myresume (own_buf, 0, signal);
3380 require_running (own_buf);
3381 convert_ascii_to_int (own_buf + 1, &sig, 1);
3382 if (gdb_signal_to_host_p (sig))
3383 signal = gdb_signal_to_host (sig);
3386 myresume (own_buf, 1, signal);
3389 require_running (own_buf);
3391 myresume (own_buf, 0, signal);
3394 require_running (own_buf);
3396 myresume (own_buf, 1, signal);
3398 case 'Z': /* insert_ ... */
3400 case 'z': /* remove_ ... */
3405 char type = own_buf[1];
3407 const int insert = ch == 'Z';
3408 char *p = &own_buf[3];
3410 p = unpack_varlen_hex (p, &addr);
3411 len = strtol (p + 1, &dataptr, 16);
3413 /* Default to unrecognized/unsupported. */
3417 case '0': /* software-breakpoint */
3418 case '1': /* hardware-breakpoint */
3419 case '2': /* write watchpoint */
3420 case '3': /* read watchpoint */
3421 case '4': /* access watchpoint */
3422 require_running (own_buf);
3423 if (insert && the_target->insert_point != NULL)
3425 /* Insert the breakpoint. If it is already inserted, nothing
3427 res = (*the_target->insert_point) (type, addr, len);
3429 /* GDB may have sent us a list of *point parameters to be
3430 evaluated on the target's side. Read such list here. If we
3431 already have a list of parameters, GDB is telling us to drop
3432 that list and use this one instead. */
3433 if (!res && (type == '0' || type == '1'))
3435 /* Remove previous conditions. */
3436 clear_gdb_breakpoint_conditions (addr);
3437 process_point_options (addr, &dataptr);
3440 else if (!insert && the_target->remove_point != NULL)
3441 res = (*the_target->remove_point) (type, addr, len);
3453 write_enn (own_buf);
3457 response_needed = 0;
3458 if (!target_running ())
3459 /* The packet we received doesn't make sense - but we can't
3460 reply to it, either. */
3463 fprintf (stderr, "Killing all inferiors\n");
3464 for_each_inferior (&all_processes, kill_inferior_callback);
3466 /* When using the extended protocol, we wait with no program
3467 running. The traditional protocol will exit instead. */
3468 if (extended_protocol)
3470 last_status.kind = TARGET_WAITKIND_EXITED;
3471 last_status.value.sig = GDB_SIGNAL_KILL;
3479 ptid_t gdb_id, thread_id;
3481 require_running (own_buf);
3483 gdb_id = read_ptid (&own_buf[1], NULL);
3484 thread_id = gdb_id_to_thread_id (gdb_id);
3485 if (ptid_equal (thread_id, null_ptid))
3487 write_enn (own_buf);
3491 if (mythread_alive (thread_id))
3494 write_enn (own_buf);
3498 response_needed = 0;
3500 /* Restarting the inferior is only supported in the extended
3502 if (extended_protocol)
3504 if (target_running ())
3505 for_each_inferior (&all_processes,
3506 kill_inferior_callback);
3507 fprintf (stderr, "GDBserver restarting\n");
3509 /* Wait till we are at 1st instruction in prog. */
3510 if (program_argv != NULL)
3511 start_inferior (program_argv);
3514 last_status.kind = TARGET_WAITKIND_EXITED;
3515 last_status.value.sig = GDB_SIGNAL_KILL;
3521 /* It is a request we don't understand. Respond with an
3522 empty packet so that gdb knows that we don't support this
3528 /* Extended (long) request. */
3529 handle_v_requests (own_buf, packet_len, &new_packet_len);
3533 /* It is a request we don't understand. Respond with an empty
3534 packet so that gdb knows that we don't support this
3540 if (new_packet_len != -1)
3541 putpkt_binary (own_buf, new_packet_len);
3545 response_needed = 0;
3547 if (!extended_protocol && have_ran && !target_running ())
3549 /* In non-stop, defer exiting until GDB had a chance to query
3550 the whole vStopped list (until it gets an OK). */
3551 if (QUEUE_is_empty (notif_event_p, notif_stop.queue))
3553 /* Be transparent when GDB is connected through stdio -- no
3554 need to spam GDB's console. */
3555 if (!remote_connection_is_stdio ())
3556 fprintf (stderr, "GDBserver exiting\n");
3568 /* Event-loop callback for serial events. */
3571 handle_serial_event (int err, gdb_client_data client_data)
3574 fprintf (stderr, "handling possible serial event\n");
3576 /* Really handle it. */
3577 if (process_serial_event () < 0)
3580 /* Be sure to not change the selected inferior behind GDB's back.
3581 Important in the non-stop mode asynchronous protocol. */
3582 set_desired_inferior (1);
3587 /* Event-loop callback for target events. */
3590 handle_target_event (int err, gdb_client_data client_data)
3593 fprintf (stderr, "handling possible target event\n");
3595 last_ptid = mywait (minus_one_ptid, &last_status,
3598 if (last_status.kind != TARGET_WAITKIND_IGNORE)
3600 int pid = ptid_get_pid (last_ptid);
3601 struct process_info *process = find_process_pid (pid);
3602 int forward_event = !gdb_connected () || process->gdb_detached;
3604 if (last_status.kind == TARGET_WAITKIND_EXITED
3605 || last_status.kind == TARGET_WAITKIND_SIGNALLED)
3607 mark_breakpoints_out (process);
3608 mourn_inferior (process);
3612 /* We're reporting this thread as stopped. Update its
3613 "want-stopped" state to what the client wants, until it
3614 gets a new resume action. */
3615 current_inferior->last_resume_kind = resume_stop;
3616 current_inferior->last_status = last_status;
3621 if (!target_running ())
3623 /* The last process exited. We're done. */
3627 if (last_status.kind == TARGET_WAITKIND_STOPPED)
3629 /* A thread stopped with a signal, but gdb isn't
3630 connected to handle it. Pass it down to the
3631 inferior, as if it wasn't being traced. */
3632 struct thread_resume resume_info;
3636 "GDB not connected; forwarding event %d for [%s]\n",
3637 (int) last_status.kind,
3638 target_pid_to_str (last_ptid));
3640 resume_info.thread = last_ptid;
3641 resume_info.kind = resume_continue;
3642 resume_info.sig = gdb_signal_to_host (last_status.value.sig);
3643 (*the_target->resume) (&resume_info, 1);
3645 else if (debug_threads)
3646 fprintf (stderr, "GDB not connected; ignoring event %d for [%s]\n",
3647 (int) last_status.kind,
3648 target_pid_to_str (last_ptid));
3652 struct vstop_notif *vstop_notif
3653 = xmalloc (sizeof (struct vstop_notif));
3655 vstop_notif->status = last_status;
3656 vstop_notif->ptid = last_ptid;
3657 /* Push Stop notification. */
3658 notif_push (¬if_stop,
3659 (struct notif_event *) vstop_notif);
3663 /* Be sure to not change the selected inferior behind GDB's back.
3664 Important in the non-stop mode asynchronous protocol. */
3665 set_desired_inferior (1);