1 /* Main code for remote server for GDB.
2 Copyright (C) 1989-2015 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"
33 #include "btrace-common.h"
34 #include "filestuff.h"
35 #include "tracepoint.h"
39 /* The thread set with an `Hc' packet. `Hc' is deprecated in favor of
40 `vCont'. Note the multi-process extensions made `vCont' a
41 requirement, so `Hc pPID.TID' is pretty much undefined. So
42 CONT_THREAD can be null_ptid for no `Hc' thread, minus_one_ptid for
43 resuming all threads of the process (again, `Hc' isn't used for
44 multi-process), or a specific thread ptid_t. */
47 /* The thread set with an `Hg' packet. */
48 ptid_t general_thread
;
52 int extended_protocol
;
53 static int response_needed
;
54 static int exit_requested
;
56 /* --once: Exit after the first connection has closed. */
60 int report_fork_events
;
61 int report_vfork_events
;
62 int report_exec_events
;
67 /* True if the "vContSupported" feature is active. In that case, GDB
68 wants us to report whether single step is supported in the reply to
70 static int vCont_supported
;
72 /* Whether we should attempt to disable the operating system's address
73 space randomization feature before starting an inferior. */
74 int disable_randomization
= 1;
76 static char **program_argv
, **wrapper_argv
;
78 int pass_signals
[GDB_SIGNAL_LAST
];
79 int program_signals
[GDB_SIGNAL_LAST
];
80 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 /* The current btrace configuration. This is gdbserver's mirror of GDB's
136 btrace configuration. */
137 static struct btrace_config current_btrace_conf
;
139 DEFINE_QUEUE_P (notif_event_p
);
141 /* Put a stop reply to the stop reply queue. */
144 queue_stop_reply (ptid_t ptid
, struct target_waitstatus
*status
)
146 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
148 new_notif
->ptid
= ptid
;
149 new_notif
->status
= *status
;
151 notif_event_enque (¬if_stop
, (struct notif_event
*) new_notif
);
155 remove_all_on_match_ptid (QUEUE (notif_event_p
) *q
,
156 QUEUE_ITER (notif_event_p
) *iter
,
157 struct notif_event
*event
,
160 ptid_t filter_ptid
= *(ptid_t
*) data
;
161 struct vstop_notif
*vstop_event
= (struct vstop_notif
*) event
;
163 if (ptid_match (vstop_event
->ptid
, filter_ptid
))
165 if (q
->free_func
!= NULL
)
166 q
->free_func (event
);
168 QUEUE_remove_elem (notif_event_p
, q
, iter
);
177 discard_queued_stop_replies (ptid_t ptid
)
179 QUEUE_iterate (notif_event_p
, notif_stop
.queue
,
180 remove_all_on_match_ptid
, &ptid
);
184 vstop_notif_reply (struct notif_event
*event
, char *own_buf
)
186 struct vstop_notif
*vstop
= (struct vstop_notif
*) event
;
188 prepare_resume_reply (own_buf
, vstop
->ptid
, &vstop
->status
);
191 struct notif_server notif_stop
=
193 "vStopped", "Stop", NULL
, vstop_notif_reply
,
197 target_running (void)
199 return get_first_thread () != NULL
;
203 start_inferior (char **argv
)
205 char **new_argv
= argv
;
207 if (wrapper_argv
!= NULL
)
211 for (i
= 0; wrapper_argv
[i
] != NULL
; i
++)
213 for (i
= 0; argv
[i
] != NULL
; i
++)
215 new_argv
= XALLOCAVEC (char *, count
);
217 for (i
= 0; wrapper_argv
[i
] != NULL
; i
++)
218 new_argv
[count
++] = wrapper_argv
[i
];
219 for (i
= 0; argv
[i
] != NULL
; i
++)
220 new_argv
[count
++] = argv
[i
];
221 new_argv
[count
] = NULL
;
227 for (i
= 0; new_argv
[i
]; ++i
)
228 debug_printf ("new_argv[%d] = \"%s\"\n", i
, new_argv
[i
]);
233 signal (SIGTTOU
, SIG_DFL
);
234 signal (SIGTTIN
, SIG_DFL
);
237 signal_pid
= create_inferior (new_argv
[0], new_argv
);
239 /* FIXME: we don't actually know at this point that the create
240 actually succeeded. We won't know that until we wait. */
241 fprintf (stderr
, "Process %s created; pid = %ld\n", argv
[0],
246 signal (SIGTTOU
, SIG_IGN
);
247 signal (SIGTTIN
, SIG_IGN
);
248 terminal_fd
= fileno (stderr
);
249 old_foreground_pgrp
= tcgetpgrp (terminal_fd
);
250 tcsetpgrp (terminal_fd
, signal_pid
);
251 atexit (restore_old_foreground_pgrp
);
254 if (wrapper_argv
!= NULL
)
256 struct thread_resume resume_info
;
258 memset (&resume_info
, 0, sizeof (resume_info
));
259 resume_info
.thread
= pid_to_ptid (signal_pid
);
260 resume_info
.kind
= resume_continue
;
263 last_ptid
= mywait (pid_to_ptid (signal_pid
), &last_status
, 0, 0);
265 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
269 (*the_target
->resume
) (&resume_info
, 1);
271 last_ptid
= mywait (pid_to_ptid (signal_pid
), &last_status
, 0, 0);
272 if (last_status
.kind
!= TARGET_WAITKIND_STOPPED
)
275 current_thread
->last_resume_kind
= resume_stop
;
276 current_thread
->last_status
= last_status
;
278 while (last_status
.value
.sig
!= GDB_SIGNAL_TRAP
);
280 target_arch_setup ();
284 /* Wait till we are at 1st instruction in program, return new pid
285 (assuming success). */
286 last_ptid
= mywait (pid_to_ptid (signal_pid
), &last_status
, 0, 0);
288 target_arch_setup ();
290 if (last_status
.kind
!= TARGET_WAITKIND_EXITED
291 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
293 current_thread
->last_resume_kind
= resume_stop
;
294 current_thread
->last_status
= last_status
;
297 mourn_inferior (find_process_pid (ptid_get_pid (last_ptid
)));
303 attach_inferior (int pid
)
305 /* myattach should return -1 if attaching is unsupported,
306 0 if it succeeded, and call error() otherwise. */
308 if (myattach (pid
) != 0)
311 fprintf (stderr
, "Attached; pid = %d\n", pid
);
314 /* FIXME - It may be that we should get the SIGNAL_PID from the
315 attach function, so that it can be the main thread instead of
316 whichever we were told to attach to. */
321 last_ptid
= mywait (pid_to_ptid (pid
), &last_status
, 0, 0);
323 /* GDB knows to ignore the first SIGSTOP after attaching to a running
324 process using the "attach" command, but this is different; it's
325 just using "target remote". Pretend it's just starting up. */
326 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
327 && last_status
.value
.sig
== GDB_SIGNAL_STOP
)
328 last_status
.value
.sig
= GDB_SIGNAL_TRAP
;
330 current_thread
->last_resume_kind
= resume_stop
;
331 current_thread
->last_status
= last_status
;
337 extern int remote_debug
;
339 /* Decode a qXfer read request. Return 0 if everything looks OK,
343 decode_xfer_read (char *buf
, CORE_ADDR
*ofs
, unsigned int *len
)
345 /* After the read marker and annex, qXfer looks like a
346 traditional 'm' packet. */
347 decode_m_packet (buf
, ofs
, len
);
353 decode_xfer (char *buf
, char **object
, char **rw
, char **annex
, char **offset
)
355 /* Extract and NUL-terminate the object. */
357 while (*buf
&& *buf
!= ':')
363 /* Extract and NUL-terminate the read/write action. */
365 while (*buf
&& *buf
!= ':')
371 /* Extract and NUL-terminate the annex. */
373 while (*buf
&& *buf
!= ':')
383 /* Write the response to a successful qXfer read. Returns the
384 length of the (binary) data stored in BUF, corresponding
385 to as much of DATA/LEN as we could fit. IS_MORE controls
386 the first character of the response. */
388 write_qxfer_response (char *buf
, const void *data
, int len
, int is_more
)
397 return remote_escape_output (data
, len
, 1, (unsigned char *) buf
+ 1,
398 &out_len
, PBUFSIZ
- 2) + 1;
401 /* Handle btrace enabling in BTS format. */
404 handle_btrace_enable_bts (struct thread_info
*thread
)
406 if (thread
->btrace
!= NULL
)
407 return "E.Btrace already enabled.";
409 current_btrace_conf
.format
= BTRACE_FORMAT_BTS
;
410 thread
->btrace
= target_enable_btrace (thread
->entry
.id
,
411 ¤t_btrace_conf
);
412 if (thread
->btrace
== NULL
)
413 return "E.Could not enable btrace.";
418 /* Handle btrace enabling in Intel(R) Processor Trace format. */
421 handle_btrace_enable_pt (struct thread_info
*thread
)
423 if (thread
->btrace
!= NULL
)
424 return "E.Btrace already enabled.";
426 current_btrace_conf
.format
= BTRACE_FORMAT_PT
;
427 thread
->btrace
= target_enable_btrace (thread
->entry
.id
,
428 ¤t_btrace_conf
);
429 if (thread
->btrace
== NULL
)
430 return "E.Could not enable btrace.";
435 /* Handle btrace disabling. */
438 handle_btrace_disable (struct thread_info
*thread
)
441 if (thread
->btrace
== NULL
)
442 return "E.Branch tracing not enabled.";
444 if (target_disable_btrace (thread
->btrace
) != 0)
445 return "E.Could not disable branch tracing.";
447 thread
->btrace
= NULL
;
451 /* Handle the "Qbtrace" packet. */
454 handle_btrace_general_set (char *own_buf
)
456 struct thread_info
*thread
;
460 if (!startswith (own_buf
, "Qbtrace:"))
463 op
= own_buf
+ strlen ("Qbtrace:");
465 if (ptid_equal (general_thread
, null_ptid
)
466 || ptid_equal (general_thread
, minus_one_ptid
))
468 strcpy (own_buf
, "E.Must select a single thread.");
472 thread
= find_thread_ptid (general_thread
);
475 strcpy (own_buf
, "E.No such thread.");
481 if (strcmp (op
, "bts") == 0)
482 err
= handle_btrace_enable_bts (thread
);
483 else if (strcmp (op
, "pt") == 0)
484 err
= handle_btrace_enable_pt (thread
);
485 else if (strcmp (op
, "off") == 0)
486 err
= handle_btrace_disable (thread
);
488 err
= "E.Bad Qbtrace operation. Use bts, pt, or off.";
491 strcpy (own_buf
, err
);
498 /* Handle the "Qbtrace-conf" packet. */
501 handle_btrace_conf_general_set (char *own_buf
)
503 struct thread_info
*thread
;
506 if (!startswith (own_buf
, "Qbtrace-conf:"))
509 op
= own_buf
+ strlen ("Qbtrace-conf:");
511 if (ptid_equal (general_thread
, null_ptid
)
512 || ptid_equal (general_thread
, minus_one_ptid
))
514 strcpy (own_buf
, "E.Must select a single thread.");
518 thread
= find_thread_ptid (general_thread
);
521 strcpy (own_buf
, "E.No such thread.");
525 if (startswith (op
, "bts:size="))
531 size
= strtoul (op
+ strlen ("bts:size="), &endp
, 16);
532 if (endp
== NULL
|| *endp
!= 0 || errno
!= 0 || size
> UINT_MAX
)
534 strcpy (own_buf
, "E.Bad size value.");
538 current_btrace_conf
.bts
.size
= (unsigned int) size
;
540 else if (strncmp (op
, "pt:size=", strlen ("pt:size=")) == 0)
546 size
= strtoul (op
+ strlen ("pt:size="), &endp
, 16);
547 if (endp
== NULL
|| *endp
!= 0 || errno
!= 0 || size
> UINT_MAX
)
549 strcpy (own_buf
, "E.Bad size value.");
553 current_btrace_conf
.pt
.size
= (unsigned int) size
;
557 strcpy (own_buf
, "E.Bad Qbtrace configuration option.");
565 /* Handle all of the extended 'Q' packets. */
568 handle_general_set (char *own_buf
)
570 if (startswith (own_buf
, "QPassSignals:"))
572 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
573 const char *p
= own_buf
+ strlen ("QPassSignals:");
576 p
= decode_address_to_semicolon (&cursig
, p
);
577 for (i
= 0; i
< numsigs
; i
++)
583 /* Keep looping, to clear the remaining signals. */
586 p
= decode_address_to_semicolon (&cursig
, p
);
591 strcpy (own_buf
, "OK");
595 if (startswith (own_buf
, "QProgramSignals:"))
597 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
598 const char *p
= own_buf
+ strlen ("QProgramSignals:");
601 program_signals_p
= 1;
603 p
= decode_address_to_semicolon (&cursig
, p
);
604 for (i
= 0; i
< numsigs
; i
++)
608 program_signals
[i
] = 1;
610 /* Keep looping, to clear the remaining signals. */
613 p
= decode_address_to_semicolon (&cursig
, p
);
616 program_signals
[i
] = 0;
618 strcpy (own_buf
, "OK");
622 if (strcmp (own_buf
, "QStartNoAckMode") == 0)
626 fprintf (stderr
, "[noack mode enabled]\n");
635 if (startswith (own_buf
, "QNonStop:"))
637 char *mode
= own_buf
+ 9;
641 if (strcmp (mode
, "0") == 0)
643 else if (strcmp (mode
, "1") == 0)
647 /* We don't know what this mode is, so complain to
649 fprintf (stderr
, "Unknown non-stop mode requested: %s\n",
655 req_str
= req
? "non-stop" : "all-stop";
656 if (start_non_stop (req
) != 0)
658 fprintf (stderr
, "Setting %s mode failed\n", req_str
);
666 fprintf (stderr
, "[%s mode enabled]\n", req_str
);
672 if (startswith (own_buf
, "QDisableRandomization:"))
674 char *packet
= own_buf
+ strlen ("QDisableRandomization:");
677 unpack_varlen_hex (packet
, &setting
);
678 disable_randomization
= setting
;
682 if (disable_randomization
)
683 fprintf (stderr
, "[address space randomization disabled]\n");
685 fprintf (stderr
, "[address space randomization enabled]\n");
692 if (target_supports_tracepoints ()
693 && handle_tracepoint_general_set (own_buf
))
696 if (startswith (own_buf
, "QAgent:"))
698 char *mode
= own_buf
+ strlen ("QAgent:");
701 if (strcmp (mode
, "0") == 0)
703 else if (strcmp (mode
, "1") == 0)
707 /* We don't know what this value is, so complain to GDB. */
708 sprintf (own_buf
, "E.Unknown QAgent value");
712 /* Update the flag. */
715 fprintf (stderr
, "[%s agent]\n", req
? "Enable" : "Disable");
720 if (handle_btrace_general_set (own_buf
))
723 if (handle_btrace_conf_general_set (own_buf
))
726 /* Otherwise we didn't know what packet it was. Say we didn't
732 get_features_xml (const char *annex
)
734 const struct target_desc
*desc
= current_target_desc ();
736 /* `desc->xmltarget' defines what to return when looking for the
737 "target.xml" file. Its contents can either be verbatim XML code
738 (prefixed with a '@') or else the name of the actual XML file to
739 be used in place of "target.xml".
741 This variable is set up from the auto-generated
742 init_registers_... routine for the current target. */
744 if (desc
->xmltarget
!= NULL
&& strcmp (annex
, "target.xml") == 0)
746 if (*desc
->xmltarget
== '@')
747 return desc
->xmltarget
+ 1;
749 annex
= desc
->xmltarget
;
754 extern const char *const xml_builtin
[][2];
757 /* Look for the annex. */
758 for (i
= 0; xml_builtin
[i
][0] != NULL
; i
++)
759 if (strcmp (annex
, xml_builtin
[i
][0]) == 0)
762 if (xml_builtin
[i
][0] != NULL
)
763 return xml_builtin
[i
][1];
771 monitor_show_help (void)
773 monitor_output ("The following monitor commands are supported:\n");
774 monitor_output (" set debug <0|1>\n");
775 monitor_output (" Enable general debugging messages\n");
776 monitor_output (" set debug-hw-points <0|1>\n");
777 monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
778 monitor_output (" set remote-debug <0|1>\n");
779 monitor_output (" Enable remote protocol debugging messages\n");
780 monitor_output (" set debug-format option1[,option2,...]\n");
781 monitor_output (" Add additional information to debugging messages\n");
782 monitor_output (" Options: all, none");
783 monitor_output (", timestamp");
784 monitor_output ("\n");
785 monitor_output (" exit\n");
786 monitor_output (" Quit GDBserver\n");
789 /* Read trace frame or inferior memory. Returns the number of bytes
790 actually read, zero when no further transfer is possible, and -1 on
791 error. Return of a positive value smaller than LEN does not
792 indicate there's no more to be read, only the end of the transfer.
793 E.g., when GDB reads memory from a traceframe, a first request may
794 be served from a memory block that does not cover the whole request
795 length. A following request gets the rest served from either
796 another block (of the same traceframe) or from the read-only
800 gdb_read_memory (CORE_ADDR memaddr
, unsigned char *myaddr
, int len
)
804 if (current_traceframe
>= 0)
807 ULONGEST length
= len
;
809 if (traceframe_read_mem (current_traceframe
,
810 memaddr
, myaddr
, len
, &nbytes
))
812 /* Data read from trace buffer, we're done. */
815 if (!in_readonly_region (memaddr
, length
))
817 /* Otherwise we have a valid readonly case, fall through. */
818 /* (assume no half-trace half-real blocks for now) */
821 res
= prepare_to_access_memory ();
824 if (set_desired_thread (1))
825 res
= read_inferior_memory (memaddr
, myaddr
, len
);
828 done_accessing_memory ();
830 return res
== 0 ? len
: -1;
836 /* Write trace frame or inferior memory. Actually, writing to trace
837 frames is forbidden. */
840 gdb_write_memory (CORE_ADDR memaddr
, const unsigned char *myaddr
, int len
)
842 if (current_traceframe
>= 0)
848 ret
= prepare_to_access_memory ();
851 if (set_desired_thread (1))
852 ret
= write_inferior_memory (memaddr
, myaddr
, len
);
855 done_accessing_memory ();
861 /* Subroutine of handle_search_memory to simplify it. */
864 handle_search_memory_1 (CORE_ADDR start_addr
, CORE_ADDR search_space_len
,
865 gdb_byte
*pattern
, unsigned pattern_len
,
866 gdb_byte
*search_buf
,
867 unsigned chunk_size
, unsigned search_buf_size
,
868 CORE_ADDR
*found_addrp
)
870 /* Prime the search buffer. */
872 if (gdb_read_memory (start_addr
, search_buf
, search_buf_size
)
875 warning ("Unable to access %ld bytes of target "
876 "memory at 0x%lx, halting search.",
877 (long) search_buf_size
, (long) start_addr
);
881 /* Perform the search.
883 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
884 When we've scanned N bytes we copy the trailing bytes to the start and
885 read in another N bytes. */
887 while (search_space_len
>= pattern_len
)
890 unsigned nr_search_bytes
= (search_space_len
< search_buf_size
894 found_ptr
= memmem (search_buf
, nr_search_bytes
, pattern
, pattern_len
);
896 if (found_ptr
!= NULL
)
898 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
899 *found_addrp
= found_addr
;
903 /* Not found in this chunk, skip to next chunk. */
905 /* Don't let search_space_len wrap here, it's unsigned. */
906 if (search_space_len
>= chunk_size
)
907 search_space_len
-= chunk_size
;
909 search_space_len
= 0;
911 if (search_space_len
>= pattern_len
)
913 unsigned keep_len
= search_buf_size
- chunk_size
;
914 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
917 /* Copy the trailing part of the previous iteration to the front
918 of the buffer for the next iteration. */
919 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
921 nr_to_read
= (search_space_len
- keep_len
< chunk_size
922 ? search_space_len
- keep_len
925 if (gdb_read_memory (read_addr
, search_buf
+ keep_len
,
926 nr_to_read
) != search_buf_size
)
928 warning ("Unable to access %ld bytes of target memory "
929 "at 0x%lx, halting search.",
930 (long) nr_to_read
, (long) read_addr
);
934 start_addr
+= chunk_size
;
943 /* Handle qSearch:memory packets. */
946 handle_search_memory (char *own_buf
, int packet_len
)
948 CORE_ADDR start_addr
;
949 CORE_ADDR search_space_len
;
951 unsigned int pattern_len
;
952 /* NOTE: also defined in find.c testcase. */
953 #define SEARCH_CHUNK_SIZE 16000
954 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
955 /* Buffer to hold memory contents for searching. */
956 gdb_byte
*search_buf
;
957 unsigned search_buf_size
;
959 CORE_ADDR found_addr
;
960 int cmd_name_len
= sizeof ("qSearch:memory:") - 1;
962 pattern
= malloc (packet_len
);
965 error ("Unable to allocate memory to perform the search");
966 strcpy (own_buf
, "E00");
969 if (decode_search_memory_packet (own_buf
+ cmd_name_len
,
970 packet_len
- cmd_name_len
,
971 &start_addr
, &search_space_len
,
972 pattern
, &pattern_len
) < 0)
975 error ("Error in parsing qSearch:memory packet");
976 strcpy (own_buf
, "E00");
980 search_buf_size
= chunk_size
+ pattern_len
- 1;
982 /* No point in trying to allocate a buffer larger than the search space. */
983 if (search_space_len
< search_buf_size
)
984 search_buf_size
= search_space_len
;
986 search_buf
= malloc (search_buf_size
);
987 if (search_buf
== NULL
)
990 error ("Unable to allocate memory to perform the search");
991 strcpy (own_buf
, "E00");
995 found
= handle_search_memory_1 (start_addr
, search_space_len
,
996 pattern
, pattern_len
,
997 search_buf
, chunk_size
, search_buf_size
,
1001 sprintf (own_buf
, "1,%lx", (long) found_addr
);
1002 else if (found
== 0)
1003 strcpy (own_buf
, "0");
1005 strcpy (own_buf
, "E00");
1011 #define require_running(BUF) \
1012 if (!target_running ()) \
1018 /* Parse options to --debug-format= and "monitor set debug-format".
1019 ARG is the text after "--debug-format=" or "monitor set debug-format".
1020 IS_MONITOR is non-zero if we're invoked via "monitor set debug-format".
1021 This triggers calls to monitor_output.
1022 The result is NULL if all options were parsed ok, otherwise an error
1023 message which the caller must free.
1025 N.B. These commands affect all debug format settings, they are not
1026 cumulative. If a format is not specified, it is turned off.
1027 However, we don't go to extra trouble with things like
1028 "monitor set debug-format all,none,timestamp".
1029 Instead we just parse them one at a time, in order.
1031 The syntax for "monitor set debug" we support here is not identical
1032 to gdb's "set debug foo on|off" because we also use this function to
1033 parse "--debug-format=foo,bar". */
1036 parse_debug_format_options (const char *arg
, int is_monitor
)
1038 VEC (char_ptr
) *options
;
1042 /* First turn all debug format options off. */
1043 debug_timestamp
= 0;
1045 /* First remove leading spaces, for "monitor set debug-format". */
1046 while (isspace (*arg
))
1049 options
= delim_string_to_char_ptr_vec (arg
, ',');
1051 for (ix
= 0; VEC_iterate (char_ptr
, options
, ix
, option
); ++ix
)
1053 if (strcmp (option
, "all") == 0)
1055 debug_timestamp
= 1;
1057 monitor_output ("All extra debug format options enabled.\n");
1059 else if (strcmp (option
, "none") == 0)
1061 debug_timestamp
= 0;
1063 monitor_output ("All extra debug format options disabled.\n");
1065 else if (strcmp (option
, "timestamp") == 0)
1067 debug_timestamp
= 1;
1069 monitor_output ("Timestamps will be added to debug output.\n");
1071 else if (*option
== '\0')
1073 /* An empty option, e.g., "--debug-format=foo,,bar", is ignored. */
1078 char *msg
= xstrprintf ("Unknown debug-format argument: \"%s\"\n",
1081 free_char_ptr_vec (options
);
1086 free_char_ptr_vec (options
);
1090 /* Handle monitor commands not handled by target-specific handlers. */
1093 handle_monitor_command (char *mon
, char *own_buf
)
1095 if (strcmp (mon
, "set debug 1") == 0)
1098 monitor_output ("Debug output enabled.\n");
1100 else if (strcmp (mon
, "set debug 0") == 0)
1103 monitor_output ("Debug output disabled.\n");
1105 else if (strcmp (mon
, "set debug-hw-points 1") == 0)
1107 show_debug_regs
= 1;
1108 monitor_output ("H/W point debugging output enabled.\n");
1110 else if (strcmp (mon
, "set debug-hw-points 0") == 0)
1112 show_debug_regs
= 0;
1113 monitor_output ("H/W point debugging output disabled.\n");
1115 else if (strcmp (mon
, "set remote-debug 1") == 0)
1118 monitor_output ("Protocol debug output enabled.\n");
1120 else if (strcmp (mon
, "set remote-debug 0") == 0)
1123 monitor_output ("Protocol debug output disabled.\n");
1125 else if (startswith (mon
, "set debug-format "))
1128 = parse_debug_format_options (mon
+ sizeof ("set debug-format ") - 1,
1131 if (error_msg
!= NULL
)
1133 monitor_output (error_msg
);
1134 monitor_show_help ();
1135 write_enn (own_buf
);
1139 else if (strcmp (mon
, "help") == 0)
1140 monitor_show_help ();
1141 else if (strcmp (mon
, "exit") == 0)
1145 monitor_output ("Unknown monitor command.\n\n");
1146 monitor_show_help ();
1147 write_enn (own_buf
);
1151 /* Associates a callback with each supported qXfer'able object. */
1155 /* The object this handler handles. */
1158 /* Request that the target transfer up to LEN 8-bit bytes of the
1159 target's OBJECT. The OFFSET, for a seekable object, specifies
1160 the starting point. The ANNEX can be used to provide additional
1161 data-specific information to the target.
1163 Return the number of bytes actually transfered, zero when no
1164 further transfer is possible, -1 on error, -2 when the transfer
1165 is not supported, and -3 on a verbose error message that should
1166 be preserved. Return of a positive value smaller than LEN does
1167 not indicate the end of the object, only the end of the transfer.
1169 One, and only one, of readbuf or writebuf must be non-NULL. */
1170 int (*xfer
) (const char *annex
,
1171 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1172 ULONGEST offset
, LONGEST len
);
1175 /* Handle qXfer:auxv:read. */
1178 handle_qxfer_auxv (const char *annex
,
1179 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1180 ULONGEST offset
, LONGEST len
)
1182 if (the_target
->read_auxv
== NULL
|| writebuf
!= NULL
)
1185 if (annex
[0] != '\0' || current_thread
== NULL
)
1188 return (*the_target
->read_auxv
) (offset
, readbuf
, len
);
1191 /* Handle qXfer:exec-file:read. */
1194 handle_qxfer_exec_file (const char *const_annex
,
1195 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1196 ULONGEST offset
, LONGEST len
)
1202 if (the_target
->pid_to_exec_file
== NULL
|| writebuf
!= NULL
)
1205 if (const_annex
[0] == '\0')
1207 if (current_thread
== NULL
)
1210 pid
= pid_of (current_thread
);
1214 char *annex
= alloca (strlen (const_annex
) + 1);
1216 strcpy (annex
, const_annex
);
1217 annex
= unpack_varlen_hex (annex
, &pid
);
1219 if (annex
[0] != '\0')
1226 file
= (*the_target
->pid_to_exec_file
) (pid
);
1230 total_len
= strlen (file
);
1232 if (offset
> total_len
)
1235 if (offset
+ len
> total_len
)
1236 len
= total_len
- offset
;
1238 memcpy (readbuf
, file
+ offset
, len
);
1242 /* Handle qXfer:features:read. */
1245 handle_qxfer_features (const char *annex
,
1246 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1247 ULONGEST offset
, LONGEST len
)
1249 const char *document
;
1252 if (writebuf
!= NULL
)
1255 if (!target_running ())
1258 /* Grab the correct annex. */
1259 document
= get_features_xml (annex
);
1260 if (document
== NULL
)
1263 total_len
= strlen (document
);
1265 if (offset
> total_len
)
1268 if (offset
+ len
> total_len
)
1269 len
= total_len
- offset
;
1271 memcpy (readbuf
, document
+ offset
, len
);
1275 /* Worker routine for handle_qxfer_libraries.
1276 Add to the length pointed to by ARG a conservative estimate of the
1277 length needed to transmit the file name of INF. */
1280 accumulate_file_name_length (struct inferior_list_entry
*inf
, void *arg
)
1282 struct dll_info
*dll
= (struct dll_info
*) inf
;
1283 unsigned int *total_len
= arg
;
1285 /* Over-estimate the necessary memory. Assume that every character
1286 in the library name must be escaped. */
1287 *total_len
+= 128 + 6 * strlen (dll
->name
);
1290 /* Worker routine for handle_qxfer_libraries.
1291 Emit the XML to describe the library in INF. */
1294 emit_dll_description (struct inferior_list_entry
*inf
, void *arg
)
1296 struct dll_info
*dll
= (struct dll_info
*) inf
;
1301 strcpy (p
, " <library name=\"");
1303 name
= xml_escape_text (dll
->name
);
1307 strcpy (p
, "\"><segment address=\"");
1309 sprintf (p
, "0x%lx", (long) dll
->base_addr
);
1311 strcpy (p
, "\"/></library>\n");
1317 /* Handle qXfer:libraries:read. */
1320 handle_qxfer_libraries (const char *annex
,
1321 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1322 ULONGEST offset
, LONGEST len
)
1324 unsigned int total_len
;
1327 if (writebuf
!= NULL
)
1330 if (annex
[0] != '\0' || current_thread
== NULL
)
1334 for_each_inferior_with_data (&all_dlls
, accumulate_file_name_length
,
1337 document
= malloc (total_len
);
1338 if (document
== NULL
)
1341 strcpy (document
, "<library-list version=\"1.0\">\n");
1342 p
= document
+ strlen (document
);
1344 for_each_inferior_with_data (&all_dlls
, emit_dll_description
, &p
);
1346 strcpy (p
, "</library-list>\n");
1348 total_len
= strlen (document
);
1350 if (offset
> total_len
)
1356 if (offset
+ len
> total_len
)
1357 len
= total_len
- offset
;
1359 memcpy (readbuf
, document
+ offset
, len
);
1364 /* Handle qXfer:libraries-svr4:read. */
1367 handle_qxfer_libraries_svr4 (const char *annex
,
1368 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1369 ULONGEST offset
, LONGEST len
)
1371 if (writebuf
!= NULL
)
1374 if (current_thread
== NULL
|| the_target
->qxfer_libraries_svr4
== NULL
)
1377 return the_target
->qxfer_libraries_svr4 (annex
, readbuf
, writebuf
, offset
, len
);
1380 /* Handle qXfer:osadata:read. */
1383 handle_qxfer_osdata (const char *annex
,
1384 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1385 ULONGEST offset
, LONGEST len
)
1387 if (the_target
->qxfer_osdata
== NULL
|| writebuf
!= NULL
)
1390 return (*the_target
->qxfer_osdata
) (annex
, readbuf
, NULL
, offset
, len
);
1393 /* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
1396 handle_qxfer_siginfo (const char *annex
,
1397 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1398 ULONGEST offset
, LONGEST len
)
1400 if (the_target
->qxfer_siginfo
== NULL
)
1403 if (annex
[0] != '\0' || current_thread
== NULL
)
1406 return (*the_target
->qxfer_siginfo
) (annex
, readbuf
, writebuf
, offset
, len
);
1409 /* Handle qXfer:spu:read and qXfer:spu:write. */
1412 handle_qxfer_spu (const char *annex
,
1413 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1414 ULONGEST offset
, LONGEST len
)
1416 if (the_target
->qxfer_spu
== NULL
)
1419 if (current_thread
== NULL
)
1422 return (*the_target
->qxfer_spu
) (annex
, readbuf
, writebuf
, offset
, len
);
1425 /* Handle qXfer:statictrace:read. */
1428 handle_qxfer_statictrace (const char *annex
,
1429 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1430 ULONGEST offset
, LONGEST len
)
1434 if (writebuf
!= NULL
)
1437 if (annex
[0] != '\0' || current_thread
== NULL
|| current_traceframe
== -1)
1440 if (traceframe_read_sdata (current_traceframe
, offset
,
1441 readbuf
, len
, &nbytes
))
1446 /* Helper for handle_qxfer_threads_proper.
1447 Emit the XML to describe the thread of INF. */
1450 handle_qxfer_threads_worker (struct inferior_list_entry
*inf
, void *arg
)
1452 struct thread_info
*thread
= (struct thread_info
*) inf
;
1453 struct buffer
*buffer
= arg
;
1454 ptid_t ptid
= thread_to_gdb_id (thread
);
1456 int core
= target_core_of_thread (ptid
);
1459 write_ptid (ptid_s
, ptid
);
1463 sprintf (core_s
, "%d", core
);
1464 buffer_xml_printf (buffer
, "<thread id=\"%s\" core=\"%s\"/>\n",
1469 buffer_xml_printf (buffer
, "<thread id=\"%s\"/>\n",
1474 /* Helper for handle_qxfer_threads. */
1477 handle_qxfer_threads_proper (struct buffer
*buffer
)
1479 buffer_grow_str (buffer
, "<threads>\n");
1481 for_each_inferior_with_data (&all_threads
, handle_qxfer_threads_worker
,
1484 buffer_grow_str0 (buffer
, "</threads>\n");
1487 /* Handle qXfer:threads:read. */
1490 handle_qxfer_threads (const char *annex
,
1491 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1492 ULONGEST offset
, LONGEST len
)
1494 static char *result
= 0;
1495 static unsigned int result_length
= 0;
1497 if (writebuf
!= NULL
)
1500 if (annex
[0] != '\0')
1505 struct buffer buffer
;
1506 /* When asked for data at offset 0, generate everything and store into
1507 'result'. Successive reads will be served off 'result'. */
1511 buffer_init (&buffer
);
1513 handle_qxfer_threads_proper (&buffer
);
1515 result
= buffer_finish (&buffer
);
1516 result_length
= strlen (result
);
1517 buffer_free (&buffer
);
1520 if (offset
>= result_length
)
1522 /* We're out of data. */
1529 if (len
> result_length
- offset
)
1530 len
= result_length
- offset
;
1532 memcpy (readbuf
, result
+ offset
, len
);
1537 /* Handle qXfer:traceframe-info:read. */
1540 handle_qxfer_traceframe_info (const char *annex
,
1541 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1542 ULONGEST offset
, LONGEST len
)
1544 static char *result
= 0;
1545 static unsigned int result_length
= 0;
1547 if (writebuf
!= NULL
)
1550 if (!target_running () || annex
[0] != '\0' || current_traceframe
== -1)
1555 struct buffer buffer
;
1557 /* When asked for data at offset 0, generate everything and
1558 store into 'result'. Successive reads will be served off
1562 buffer_init (&buffer
);
1564 traceframe_read_info (current_traceframe
, &buffer
);
1566 result
= buffer_finish (&buffer
);
1567 result_length
= strlen (result
);
1568 buffer_free (&buffer
);
1571 if (offset
>= result_length
)
1573 /* We're out of data. */
1580 if (len
> result_length
- offset
)
1581 len
= result_length
- offset
;
1583 memcpy (readbuf
, result
+ offset
, len
);
1587 /* Handle qXfer:fdpic:read. */
1590 handle_qxfer_fdpic (const char *annex
, gdb_byte
*readbuf
,
1591 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1593 if (the_target
->read_loadmap
== NULL
)
1596 if (current_thread
== NULL
)
1599 return (*the_target
->read_loadmap
) (annex
, offset
, readbuf
, len
);
1602 /* Handle qXfer:btrace:read. */
1605 handle_qxfer_btrace (const char *annex
,
1606 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1607 ULONGEST offset
, LONGEST len
)
1609 static struct buffer cache
;
1610 struct thread_info
*thread
;
1613 if (the_target
->read_btrace
== NULL
|| writebuf
!= NULL
)
1616 if (ptid_equal (general_thread
, null_ptid
)
1617 || ptid_equal (general_thread
, minus_one_ptid
))
1619 strcpy (own_buf
, "E.Must select a single thread.");
1623 thread
= find_thread_ptid (general_thread
);
1626 strcpy (own_buf
, "E.No such thread.");
1630 if (thread
->btrace
== NULL
)
1632 strcpy (own_buf
, "E.Btrace not enabled.");
1636 if (strcmp (annex
, "all") == 0)
1637 type
= BTRACE_READ_ALL
;
1638 else if (strcmp (annex
, "new") == 0)
1639 type
= BTRACE_READ_NEW
;
1640 else if (strcmp (annex
, "delta") == 0)
1641 type
= BTRACE_READ_DELTA
;
1644 strcpy (own_buf
, "E.Bad annex.");
1650 buffer_free (&cache
);
1652 result
= target_read_btrace (thread
->btrace
, &cache
, type
);
1655 memcpy (own_buf
, cache
.buffer
, cache
.used_size
);
1659 else if (offset
> cache
.used_size
)
1661 buffer_free (&cache
);
1665 if (len
> cache
.used_size
- offset
)
1666 len
= cache
.used_size
- offset
;
1668 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1673 /* Handle qXfer:btrace-conf:read. */
1676 handle_qxfer_btrace_conf (const char *annex
,
1677 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1678 ULONGEST offset
, LONGEST len
)
1680 static struct buffer cache
;
1681 struct thread_info
*thread
;
1684 if (the_target
->read_btrace_conf
== NULL
|| writebuf
!= NULL
)
1687 if (annex
[0] != '\0')
1690 if (ptid_equal (general_thread
, null_ptid
)
1691 || ptid_equal (general_thread
, minus_one_ptid
))
1693 strcpy (own_buf
, "E.Must select a single thread.");
1697 thread
= find_thread_ptid (general_thread
);
1700 strcpy (own_buf
, "E.No such thread.");
1704 if (thread
->btrace
== NULL
)
1706 strcpy (own_buf
, "E.Btrace not enabled.");
1712 buffer_free (&cache
);
1714 result
= target_read_btrace_conf (thread
->btrace
, &cache
);
1717 memcpy (own_buf
, cache
.buffer
, cache
.used_size
);
1721 else if (offset
> cache
.used_size
)
1723 buffer_free (&cache
);
1727 if (len
> cache
.used_size
- offset
)
1728 len
= cache
.used_size
- offset
;
1730 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1735 static const struct qxfer qxfer_packets
[] =
1737 { "auxv", handle_qxfer_auxv
},
1738 { "btrace", handle_qxfer_btrace
},
1739 { "btrace-conf", handle_qxfer_btrace_conf
},
1740 { "exec-file", handle_qxfer_exec_file
},
1741 { "fdpic", handle_qxfer_fdpic
},
1742 { "features", handle_qxfer_features
},
1743 { "libraries", handle_qxfer_libraries
},
1744 { "libraries-svr4", handle_qxfer_libraries_svr4
},
1745 { "osdata", handle_qxfer_osdata
},
1746 { "siginfo", handle_qxfer_siginfo
},
1747 { "spu", handle_qxfer_spu
},
1748 { "statictrace", handle_qxfer_statictrace
},
1749 { "threads", handle_qxfer_threads
},
1750 { "traceframe-info", handle_qxfer_traceframe_info
},
1754 handle_qxfer (char *own_buf
, int packet_len
, int *new_packet_len_p
)
1762 if (!startswith (own_buf
, "qXfer:"))
1765 /* Grab the object, r/w and annex. */
1766 if (decode_xfer (own_buf
+ 6, &object
, &rw
, &annex
, &offset
) < 0)
1768 write_enn (own_buf
);
1773 i
< sizeof (qxfer_packets
) / sizeof (qxfer_packets
[0]);
1776 const struct qxfer
*q
= &qxfer_packets
[i
];
1778 if (strcmp (object
, q
->object
) == 0)
1780 if (strcmp (rw
, "read") == 0)
1782 unsigned char *data
;
1787 /* Grab the offset and length. */
1788 if (decode_xfer_read (offset
, &ofs
, &len
) < 0)
1790 write_enn (own_buf
);
1794 /* Read one extra byte, as an indicator of whether there is
1796 if (len
> PBUFSIZ
- 2)
1798 data
= malloc (len
+ 1);
1801 write_enn (own_buf
);
1804 n
= (*q
->xfer
) (annex
, data
, NULL
, ofs
, len
+ 1);
1812 /* Preserve error message. */
1815 write_enn (own_buf
);
1817 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, len
, 1);
1819 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, n
, 0);
1824 else if (strcmp (rw
, "write") == 0)
1829 unsigned char *data
;
1831 strcpy (own_buf
, "E00");
1832 data
= malloc (packet_len
- (offset
- own_buf
));
1835 write_enn (own_buf
);
1838 if (decode_xfer_write (offset
, packet_len
- (offset
- own_buf
),
1839 &ofs
, &len
, data
) < 0)
1842 write_enn (own_buf
);
1846 n
= (*q
->xfer
) (annex
, NULL
, data
, ofs
, len
);
1854 /* Preserve error message. */
1857 write_enn (own_buf
);
1859 sprintf (own_buf
, "%x", n
);
1872 /* Table used by the crc32 function to calcuate the checksum. */
1874 static unsigned int crc32_table
[256] =
1877 /* Compute 32 bit CRC from inferior memory.
1879 On success, return 32 bit CRC.
1880 On failure, return (unsigned long long) -1. */
1882 static unsigned long long
1883 crc32 (CORE_ADDR base
, int len
, unsigned int crc
)
1885 if (!crc32_table
[1])
1887 /* Initialize the CRC table and the decoding table. */
1891 for (i
= 0; i
< 256; i
++)
1893 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
1894 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
1901 unsigned char byte
= 0;
1903 /* Return failure if memory read fails. */
1904 if (read_inferior_memory (base
, &byte
, 1) != 0)
1905 return (unsigned long long) -1;
1907 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ byte
) & 255];
1910 return (unsigned long long) crc
;
1913 /* Add supported btrace packets to BUF. */
1916 supported_btrace_packets (char *buf
)
1918 int btrace_supported
= 0;
1920 if (target_supports_btrace (BTRACE_FORMAT_BTS
))
1922 strcat (buf
, ";Qbtrace:bts+");
1923 strcat (buf
, ";Qbtrace-conf:bts:size+");
1925 btrace_supported
= 1;
1928 if (target_supports_btrace (BTRACE_FORMAT_PT
))
1930 strcat (buf
, ";Qbtrace:pt+");
1931 strcat (buf
, ";Qbtrace-conf:pt:size+");
1933 btrace_supported
= 1;
1936 if (!btrace_supported
)
1939 strcat (buf
, ";Qbtrace:off+");
1940 strcat (buf
, ";qXfer:btrace:read+");
1941 strcat (buf
, ";qXfer:btrace-conf:read+");
1944 /* Handle all of the extended 'q' packets. */
1947 handle_query (char *own_buf
, int packet_len
, int *new_packet_len_p
)
1949 static struct inferior_list_entry
*thread_ptr
;
1951 /* Reply the current thread id. */
1952 if (strcmp ("qC", own_buf
) == 0 && !disable_packet_qC
)
1955 require_running (own_buf
);
1957 if (!ptid_equal (general_thread
, null_ptid
)
1958 && !ptid_equal (general_thread
, minus_one_ptid
))
1959 gdb_id
= general_thread
;
1962 thread_ptr
= get_first_inferior (&all_threads
);
1963 gdb_id
= thread_to_gdb_id ((struct thread_info
*)thread_ptr
);
1966 sprintf (own_buf
, "QC");
1968 write_ptid (own_buf
, gdb_id
);
1972 if (strcmp ("qSymbol::", own_buf
) == 0)
1974 /* GDB is suggesting new symbols have been loaded. This may
1975 mean a new shared library has been detected as loaded, so
1976 take the opportunity to check if breakpoints we think are
1977 inserted, still are. Note that it isn't guaranteed that
1978 we'll see this when a shared library is loaded, and nor will
1979 we see this for unloads (although breakpoints in unloaded
1980 libraries shouldn't trigger), as GDB may not find symbols for
1981 the library at all. We also re-validate breakpoints when we
1982 see a second GDB breakpoint for the same address, and or when
1983 we access breakpoint shadows. */
1984 validate_breakpoints ();
1986 if (target_supports_tracepoints ())
1987 tracepoint_look_up_symbols ();
1989 if (current_thread
!= NULL
&& the_target
->look_up_symbols
!= NULL
)
1990 (*the_target
->look_up_symbols
) ();
1992 strcpy (own_buf
, "OK");
1996 if (!disable_packet_qfThreadInfo
)
1998 if (strcmp ("qfThreadInfo", own_buf
) == 0)
2002 require_running (own_buf
);
2003 thread_ptr
= get_first_inferior (&all_threads
);
2006 gdb_id
= thread_to_gdb_id ((struct thread_info
*)thread_ptr
);
2007 write_ptid (own_buf
, gdb_id
);
2008 thread_ptr
= thread_ptr
->next
;
2012 if (strcmp ("qsThreadInfo", own_buf
) == 0)
2016 require_running (own_buf
);
2017 if (thread_ptr
!= NULL
)
2020 gdb_id
= thread_to_gdb_id ((struct thread_info
*)thread_ptr
);
2021 write_ptid (own_buf
, gdb_id
);
2022 thread_ptr
= thread_ptr
->next
;
2027 sprintf (own_buf
, "l");
2033 if (the_target
->read_offsets
!= NULL
2034 && strcmp ("qOffsets", own_buf
) == 0)
2036 CORE_ADDR text
, data
;
2038 require_running (own_buf
);
2039 if (the_target
->read_offsets (&text
, &data
))
2040 sprintf (own_buf
, "Text=%lX;Data=%lX;Bss=%lX",
2041 (long)text
, (long)data
, (long)data
);
2043 write_enn (own_buf
);
2048 /* Protocol features query. */
2049 if (startswith (own_buf
, "qSupported")
2050 && (own_buf
[10] == ':' || own_buf
[10] == '\0'))
2052 char *p
= &own_buf
[10];
2053 int gdb_supports_qRelocInsn
= 0;
2055 /* Start processing qSupported packet. */
2056 target_process_qsupported (NULL
);
2058 /* Process each feature being provided by GDB. The first
2059 feature will follow a ':', and latter features will follow
2063 char **qsupported
= NULL
;
2067 /* Two passes, to avoid nested strtok calls in
2068 target_process_qsupported. */
2069 for (p
= strtok (p
+ 1, ";");
2071 p
= strtok (NULL
, ";"))
2074 qsupported
= xrealloc (qsupported
, count
* sizeof (char *));
2075 qsupported
[count
- 1] = xstrdup (p
);
2078 for (i
= 0; i
< count
; i
++)
2081 if (strcmp (p
, "multiprocess+") == 0)
2083 /* GDB supports and wants multi-process support if
2085 if (target_supports_multi_process ())
2088 else if (strcmp (p
, "qRelocInsn+") == 0)
2090 /* GDB supports relocate instruction requests. */
2091 gdb_supports_qRelocInsn
= 1;
2093 else if (strcmp (p
, "swbreak+") == 0)
2095 /* GDB wants us to report whether a trap is caused
2096 by a software breakpoint and for us to handle PC
2097 adjustment if necessary on this target. */
2098 if (target_supports_stopped_by_sw_breakpoint ())
2099 swbreak_feature
= 1;
2101 else if (strcmp (p
, "hwbreak+") == 0)
2103 /* GDB wants us to report whether a trap is caused
2104 by a hardware breakpoint. */
2105 if (target_supports_stopped_by_hw_breakpoint ())
2106 hwbreak_feature
= 1;
2108 else if (strcmp (p
, "fork-events+") == 0)
2110 /* GDB supports and wants fork events if possible. */
2111 if (target_supports_fork_events ())
2112 report_fork_events
= 1;
2114 else if (strcmp (p
, "vfork-events+") == 0)
2116 /* GDB supports and wants vfork events if possible. */
2117 if (target_supports_vfork_events ())
2118 report_vfork_events
= 1;
2120 else if (strcmp (p
, "exec-events+") == 0)
2122 /* GDB supports and wants exec events if possible. */
2123 if (target_supports_exec_events ())
2124 report_exec_events
= 1;
2126 else if (strcmp (p
, "vContSupported+") == 0)
2127 vCont_supported
= 1;
2129 target_process_qsupported (p
);
2138 "PacketSize=%x;QPassSignals+;QProgramSignals+",
2141 if (the_target
->qxfer_libraries_svr4
!= NULL
)
2142 strcat (own_buf
, ";qXfer:libraries-svr4:read+"
2143 ";augmented-libraries-svr4-read+");
2146 /* We do not have any hook to indicate whether the non-SVR4 target
2147 backend supports qXfer:libraries:read, so always report it. */
2148 strcat (own_buf
, ";qXfer:libraries:read+");
2151 if (the_target
->read_auxv
!= NULL
)
2152 strcat (own_buf
, ";qXfer:auxv:read+");
2154 if (the_target
->qxfer_spu
!= NULL
)
2155 strcat (own_buf
, ";qXfer:spu:read+;qXfer:spu:write+");
2157 if (the_target
->qxfer_siginfo
!= NULL
)
2158 strcat (own_buf
, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
2160 if (the_target
->read_loadmap
!= NULL
)
2161 strcat (own_buf
, ";qXfer:fdpic:read+");
2163 /* We always report qXfer:features:read, as targets may
2164 install XML files on a subsequent call to arch_setup.
2165 If we reported to GDB on startup that we don't support
2166 qXfer:feature:read at all, we will never be re-queried. */
2167 strcat (own_buf
, ";qXfer:features:read+");
2169 if (transport_is_reliable
)
2170 strcat (own_buf
, ";QStartNoAckMode+");
2172 if (the_target
->qxfer_osdata
!= NULL
)
2173 strcat (own_buf
, ";qXfer:osdata:read+");
2175 if (target_supports_multi_process ())
2176 strcat (own_buf
, ";multiprocess+");
2178 if (target_supports_fork_events ())
2179 strcat (own_buf
, ";fork-events+");
2181 if (target_supports_vfork_events ())
2182 strcat (own_buf
, ";vfork-events+");
2184 if (target_supports_exec_events ())
2185 strcat (own_buf
, ";exec-events+");
2187 if (target_supports_non_stop ())
2188 strcat (own_buf
, ";QNonStop+");
2190 if (target_supports_disable_randomization ())
2191 strcat (own_buf
, ";QDisableRandomization+");
2193 strcat (own_buf
, ";qXfer:threads:read+");
2195 if (target_supports_tracepoints ())
2197 strcat (own_buf
, ";ConditionalTracepoints+");
2198 strcat (own_buf
, ";TraceStateVariables+");
2199 strcat (own_buf
, ";TracepointSource+");
2200 strcat (own_buf
, ";DisconnectedTracing+");
2201 if (gdb_supports_qRelocInsn
&& target_supports_fast_tracepoints ())
2202 strcat (own_buf
, ";FastTracepoints+");
2203 strcat (own_buf
, ";StaticTracepoints+");
2204 strcat (own_buf
, ";InstallInTrace+");
2205 strcat (own_buf
, ";qXfer:statictrace:read+");
2206 strcat (own_buf
, ";qXfer:traceframe-info:read+");
2207 strcat (own_buf
, ";EnableDisableTracepoints+");
2208 strcat (own_buf
, ";QTBuffer:size+");
2209 strcat (own_buf
, ";tracenz+");
2212 if (target_supports_hardware_single_step ())
2214 /* Support target-side breakpoint conditions and commands.
2215 GDBserver needs to step over the breakpoint if the condition
2216 is false. GDBserver software single step is too simple, so
2217 disable conditional breakpoints if the target doesn't have
2218 hardware single step. */
2219 strcat (own_buf
, ";ConditionalBreakpoints+");
2221 strcat (own_buf
, ";BreakpointCommands+");
2223 if (target_supports_agent ())
2224 strcat (own_buf
, ";QAgent+");
2226 supported_btrace_packets (own_buf
);
2228 if (target_supports_stopped_by_sw_breakpoint ())
2229 strcat (own_buf
, ";swbreak+");
2231 if (target_supports_stopped_by_hw_breakpoint ())
2232 strcat (own_buf
, ";hwbreak+");
2234 if (the_target
->pid_to_exec_file
!= NULL
)
2235 strcat (own_buf
, ";qXfer:exec-file:read+");
2237 strcat (own_buf
, ";vContSupported+");
2239 /* Reinitialize components as needed for the new connection. */
2240 hostio_handle_new_gdb_connection ();
2241 target_handle_new_gdb_connection ();
2246 /* Thread-local storage support. */
2247 if (the_target
->get_tls_address
!= NULL
2248 && startswith (own_buf
, "qGetTLSAddr:"))
2250 char *p
= own_buf
+ 12;
2251 CORE_ADDR parts
[2], address
= 0;
2253 ptid_t ptid
= null_ptid
;
2255 require_running (own_buf
);
2257 for (i
= 0; i
< 3; i
++)
2265 p2
= strchr (p
, ',');
2278 ptid
= read_ptid (p
, NULL
);
2280 decode_address (&parts
[i
- 1], p
, len
);
2284 if (p
!= NULL
|| i
< 3)
2288 struct thread_info
*thread
= find_thread_ptid (ptid
);
2293 err
= the_target
->get_tls_address (thread
, parts
[0], parts
[1],
2299 strcpy (own_buf
, paddress(address
));
2304 write_enn (own_buf
);
2308 /* Otherwise, pretend we do not understand this packet. */
2311 /* Windows OS Thread Information Block address support. */
2312 if (the_target
->get_tib_address
!= NULL
2313 && startswith (own_buf
, "qGetTIBAddr:"))
2318 ptid_t ptid
= read_ptid (own_buf
+ 12, &annex
);
2320 n
= (*the_target
->get_tib_address
) (ptid
, &tlb
);
2323 strcpy (own_buf
, paddress(tlb
));
2328 write_enn (own_buf
);
2334 /* Handle "monitor" commands. */
2335 if (startswith (own_buf
, "qRcmd,"))
2337 char *mon
= malloc (PBUFSIZ
);
2338 int len
= strlen (own_buf
+ 6);
2342 write_enn (own_buf
);
2347 || hex2bin (own_buf
+ 6, (gdb_byte
*) mon
, len
/ 2) != len
/ 2)
2349 write_enn (own_buf
);
2353 mon
[len
/ 2] = '\0';
2357 if (the_target
->handle_monitor_command
== NULL
2358 || (*the_target
->handle_monitor_command
) (mon
) == 0)
2359 /* Default processing. */
2360 handle_monitor_command (mon
, own_buf
);
2366 if (startswith (own_buf
, "qSearch:memory:"))
2368 require_running (own_buf
);
2369 handle_search_memory (own_buf
, packet_len
);
2373 if (strcmp (own_buf
, "qAttached") == 0
2374 || startswith (own_buf
, "qAttached:"))
2376 struct process_info
*process
;
2378 if (own_buf
[sizeof ("qAttached") - 1])
2380 int pid
= strtoul (own_buf
+ sizeof ("qAttached:") - 1, NULL
, 16);
2381 process
= (struct process_info
*)
2382 find_inferior_id (&all_processes
, pid_to_ptid (pid
));
2386 require_running (own_buf
);
2387 process
= current_process ();
2390 if (process
== NULL
)
2392 write_enn (own_buf
);
2396 strcpy (own_buf
, process
->attached
? "1" : "0");
2400 if (startswith (own_buf
, "qCRC:"))
2402 /* CRC check (compare-section). */
2406 unsigned long long crc
;
2408 require_running (own_buf
);
2409 comma
= unpack_varlen_hex (own_buf
+ 5, &base
);
2410 if (*comma
++ != ',')
2412 write_enn (own_buf
);
2415 len
= strtoul (comma
, NULL
, 16);
2416 crc
= crc32 (base
, len
, 0xffffffff);
2417 /* Check for memory failure. */
2418 if (crc
== (unsigned long long) -1)
2420 write_enn (own_buf
);
2423 sprintf (own_buf
, "C%lx", (unsigned long) crc
);
2427 if (handle_qxfer (own_buf
, packet_len
, new_packet_len_p
))
2430 if (target_supports_tracepoints () && handle_tracepoint_query (own_buf
))
2433 /* Otherwise we didn't know what packet it was. Say we didn't
2438 static void gdb_wants_all_threads_stopped (void);
2439 static void resume (struct thread_resume
*actions
, size_t n
);
2441 /* The callback that is passed to visit_actioned_threads. */
2442 typedef int (visit_actioned_threads_callback_ftype
)
2443 (const struct thread_resume
*, struct thread_info
*);
2445 /* Struct to pass data to visit_actioned_threads. */
2447 struct visit_actioned_threads_data
2449 const struct thread_resume
*actions
;
2451 visit_actioned_threads_callback_ftype
*callback
;
2454 /* Call CALLBACK for any thread to which ACTIONS applies to. Returns
2455 true if CALLBACK returns true. Returns false if no matching thread
2456 is found or CALLBACK results false.
2457 Note: This function is itself a callback for find_inferior. */
2460 visit_actioned_threads (struct inferior_list_entry
*entry
, void *datap
)
2462 struct visit_actioned_threads_data
*data
= datap
;
2463 const struct thread_resume
*actions
= data
->actions
;
2464 size_t num_actions
= data
->num_actions
;
2465 visit_actioned_threads_callback_ftype
*callback
= data
->callback
;
2468 for (i
= 0; i
< num_actions
; i
++)
2470 const struct thread_resume
*action
= &actions
[i
];
2472 if (ptid_equal (action
->thread
, minus_one_ptid
)
2473 || ptid_equal (action
->thread
, entry
->id
)
2474 || ((ptid_get_pid (action
->thread
)
2475 == ptid_get_pid (entry
->id
))
2476 && ptid_get_lwp (action
->thread
) == -1))
2478 struct thread_info
*thread
= (struct thread_info
*) entry
;
2480 if ((*callback
) (action
, thread
))
2488 /* Callback for visit_actioned_threads. If the thread has a pending
2489 status to report, report it now. */
2492 handle_pending_status (const struct thread_resume
*resumption
,
2493 struct thread_info
*thread
)
2495 if (thread
->status_pending_p
)
2497 thread
->status_pending_p
= 0;
2499 last_status
= thread
->last_status
;
2500 last_ptid
= thread
->entry
.id
;
2501 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2507 /* Parse vCont packets. */
2509 handle_v_cont (char *own_buf
)
2513 struct thread_resume
*resume_info
;
2514 struct thread_resume default_action
= {{0}};
2516 /* Count the number of semicolons in the packet. There should be one
2517 for every action. */
2523 p
= strchr (p
, ';');
2526 resume_info
= malloc (n
* sizeof (resume_info
[0]));
2527 if (resume_info
== NULL
)
2535 memset (&resume_info
[i
], 0, sizeof resume_info
[i
]);
2537 if (p
[0] == 's' || p
[0] == 'S')
2538 resume_info
[i
].kind
= resume_step
;
2539 else if (p
[0] == 'r')
2540 resume_info
[i
].kind
= resume_step
;
2541 else if (p
[0] == 'c' || p
[0] == 'C')
2542 resume_info
[i
].kind
= resume_continue
;
2543 else if (p
[0] == 't')
2544 resume_info
[i
].kind
= resume_stop
;
2548 if (p
[0] == 'S' || p
[0] == 'C')
2551 sig
= strtol (p
+ 1, &q
, 16);
2556 if (!gdb_signal_to_host_p (sig
))
2558 resume_info
[i
].sig
= gdb_signal_to_host (sig
);
2560 else if (p
[0] == 'r')
2564 p
= unpack_varlen_hex (p
+ 1, &addr
);
2565 resume_info
[i
].step_range_start
= addr
;
2570 p
= unpack_varlen_hex (p
+ 1, &addr
);
2571 resume_info
[i
].step_range_end
= addr
;
2580 resume_info
[i
].thread
= minus_one_ptid
;
2581 default_action
= resume_info
[i
];
2583 /* Note: we don't increment i here, we'll overwrite this entry
2584 the next time through. */
2586 else if (p
[0] == ':')
2588 ptid_t ptid
= read_ptid (p
+ 1, &q
);
2593 if (p
[0] != ';' && p
[0] != 0)
2596 resume_info
[i
].thread
= ptid
;
2603 resume_info
[i
] = default_action
;
2605 resume (resume_info
, n
);
2610 write_enn (own_buf
);
2615 /* Resume target with ACTIONS, an array of NUM_ACTIONS elements. */
2618 resume (struct thread_resume
*actions
, size_t num_actions
)
2622 /* Check if among the threads that GDB wants actioned, there's
2623 one with a pending status to report. If so, skip actually
2624 resuming/stopping and report the pending event
2626 struct visit_actioned_threads_data data
;
2628 data
.actions
= actions
;
2629 data
.num_actions
= num_actions
;
2630 data
.callback
= handle_pending_status
;
2631 if (find_inferior (&all_threads
, visit_actioned_threads
, &data
) != NULL
)
2637 (*the_target
->resume
) (actions
, num_actions
);
2643 last_ptid
= mywait (minus_one_ptid
, &last_status
, 0, 1);
2645 if (last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
)
2647 /* No proper RSP support for this yet. At least return
2649 sprintf (own_buf
, "E.No unwaited-for children left.");
2650 disable_async_io ();
2654 if (last_status
.kind
!= TARGET_WAITKIND_EXITED
2655 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
2656 && last_status
.kind
!= TARGET_WAITKIND_NO_RESUMED
)
2657 current_thread
->last_status
= last_status
;
2659 /* From the client's perspective, all-stop mode always stops all
2660 threads implicitly (and the target backend has already done
2661 so by now). Tag all threads as "want-stopped", so we don't
2662 resume them implicitly without the client telling us to. */
2663 gdb_wants_all_threads_stopped ();
2664 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2665 disable_async_io ();
2667 if (last_status
.kind
== TARGET_WAITKIND_EXITED
2668 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2669 mourn_inferior (find_process_pid (ptid_get_pid (last_ptid
)));
2673 /* Attach to a new program. Return 1 if successful, 0 if failure. */
2675 handle_v_attach (char *own_buf
)
2679 pid
= strtol (own_buf
+ 8, NULL
, 16);
2680 if (pid
!= 0 && attach_inferior (pid
) == 0)
2682 /* Don't report shared library events after attaching, even if
2683 some libraries are preloaded. GDB will always poll the
2684 library list. Avoids the "stopped by shared library event"
2685 notice on the GDB side. */
2690 /* In non-stop, we don't send a resume reply. Stop events
2691 will follow up using the normal notification
2696 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2702 write_enn (own_buf
);
2707 /* Run a new program. Return 1 if successful, 0 if failure. */
2709 handle_v_run (char *own_buf
)
2711 char *p
, *next_p
, **new_argv
;
2715 for (p
= own_buf
+ strlen ("vRun;"); p
&& *p
; p
= strchr (p
, ';'))
2721 new_argv
= calloc (new_argc
+ 2, sizeof (char *));
2722 if (new_argv
== NULL
)
2724 write_enn (own_buf
);
2729 for (p
= own_buf
+ strlen ("vRun;"); *p
; p
= next_p
)
2731 next_p
= strchr (p
, ';');
2733 next_p
= p
+ strlen (p
);
2735 if (i
== 0 && p
== next_p
)
2739 /* FIXME: Fail request if out of memory instead of dying. */
2740 new_argv
[i
] = xmalloc (1 + (next_p
- p
) / 2);
2741 hex2bin (p
, (gdb_byte
*) new_argv
[i
], (next_p
- p
) / 2);
2742 new_argv
[i
][(next_p
- p
) / 2] = '\0';
2751 if (new_argv
[0] == NULL
)
2753 /* GDB didn't specify a program to run. Use the program from the
2754 last run with the new argument list. */
2756 if (program_argv
== NULL
)
2758 write_enn (own_buf
);
2759 freeargv (new_argv
);
2763 new_argv
[0] = strdup (program_argv
[0]);
2764 if (new_argv
[0] == NULL
)
2766 write_enn (own_buf
);
2767 freeargv (new_argv
);
2772 /* Free the old argv and install the new one. */
2773 freeargv (program_argv
);
2774 program_argv
= new_argv
;
2776 start_inferior (program_argv
);
2777 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
2779 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2781 /* In non-stop, sending a resume reply doesn't set the general
2782 thread, but GDB assumes a vRun sets it (this is so GDB can
2783 query which is the main thread of the new inferior. */
2785 general_thread
= last_ptid
;
2791 write_enn (own_buf
);
2796 /* Kill process. Return 1 if successful, 0 if failure. */
2798 handle_v_kill (char *own_buf
)
2801 char *p
= &own_buf
[6];
2803 pid
= strtol (p
, NULL
, 16);
2806 if (pid
!= 0 && kill_inferior (pid
) == 0)
2808 last_status
.kind
= TARGET_WAITKIND_SIGNALLED
;
2809 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
2810 last_ptid
= pid_to_ptid (pid
);
2811 discard_queued_stop_replies (last_ptid
);
2817 write_enn (own_buf
);
2822 /* Handle all of the extended 'v' packets. */
2824 handle_v_requests (char *own_buf
, int packet_len
, int *new_packet_len
)
2826 if (!disable_packet_vCont
)
2828 if (startswith (own_buf
, "vCont;"))
2830 require_running (own_buf
);
2831 handle_v_cont (own_buf
);
2835 if (startswith (own_buf
, "vCont?"))
2837 strcpy (own_buf
, "vCont;c;C;t");
2839 if (target_supports_hardware_single_step () || !vCont_supported
)
2841 /* If target supports hardware single step, add actions s
2842 and S to the list of supported actions. On the other
2843 hand, if GDB doesn't request the supported vCont actions
2844 in qSupported packet, add s and S to the list too. */
2845 own_buf
= own_buf
+ strlen (own_buf
);
2846 strcpy (own_buf
, ";s;S");
2849 if (target_supports_range_stepping ())
2851 own_buf
= own_buf
+ strlen (own_buf
);
2852 strcpy (own_buf
, ";r");
2858 if (startswith (own_buf
, "vFile:")
2859 && handle_vFile (own_buf
, packet_len
, new_packet_len
))
2862 if (startswith (own_buf
, "vAttach;"))
2864 if ((!extended_protocol
|| !multi_process
) && target_running ())
2866 fprintf (stderr
, "Already debugging a process\n");
2867 write_enn (own_buf
);
2870 handle_v_attach (own_buf
);
2874 if (startswith (own_buf
, "vRun;"))
2876 if ((!extended_protocol
|| !multi_process
) && target_running ())
2878 fprintf (stderr
, "Already debugging a process\n");
2879 write_enn (own_buf
);
2882 handle_v_run (own_buf
);
2886 if (startswith (own_buf
, "vKill;"))
2888 if (!target_running ())
2890 fprintf (stderr
, "No process to kill\n");
2891 write_enn (own_buf
);
2894 handle_v_kill (own_buf
);
2898 if (handle_notif_ack (own_buf
, packet_len
))
2901 /* Otherwise we didn't know what packet it was. Say we didn't
2907 /* Resume thread and wait for another event. In non-stop mode,
2908 don't really wait here, but return immediatelly to the event
2911 myresume (char *own_buf
, int step
, int sig
)
2913 struct thread_resume resume_info
[2];
2915 int valid_cont_thread
;
2917 valid_cont_thread
= (!ptid_equal (cont_thread
, null_ptid
)
2918 && !ptid_equal (cont_thread
, minus_one_ptid
));
2920 if (step
|| sig
|| valid_cont_thread
)
2922 resume_info
[0].thread
= current_ptid
;
2924 resume_info
[0].kind
= resume_step
;
2926 resume_info
[0].kind
= resume_continue
;
2927 resume_info
[0].sig
= sig
;
2931 if (!valid_cont_thread
)
2933 resume_info
[n
].thread
= minus_one_ptid
;
2934 resume_info
[n
].kind
= resume_continue
;
2935 resume_info
[n
].sig
= 0;
2939 resume (resume_info
, n
);
2942 /* Callback for for_each_inferior. Make a new stop reply for each
2946 queue_stop_reply_callback (struct inferior_list_entry
*entry
, void *arg
)
2948 struct thread_info
*thread
= (struct thread_info
*) entry
;
2950 /* For now, assume targets that don't have this callback also don't
2951 manage the thread's last_status field. */
2952 if (the_target
->thread_stopped
== NULL
)
2954 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
2956 new_notif
->ptid
= entry
->id
;
2957 new_notif
->status
= thread
->last_status
;
2958 /* Pass the last stop reply back to GDB, but don't notify
2960 notif_event_enque (¬if_stop
,
2961 (struct notif_event
*) new_notif
);
2965 if (thread_stopped (thread
))
2970 = target_waitstatus_to_string (&thread
->last_status
);
2972 debug_printf ("Reporting thread %s as already stopped with %s\n",
2973 target_pid_to_str (entry
->id
),
2976 xfree (status_string
);
2979 gdb_assert (thread
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
2981 /* Pass the last stop reply back to GDB, but don't notify
2983 queue_stop_reply (entry
->id
, &thread
->last_status
);
2990 /* Set this inferior threads's state as "want-stopped". We won't
2991 resume this thread until the client gives us another action for
2995 gdb_wants_thread_stopped (struct inferior_list_entry
*entry
)
2997 struct thread_info
*thread
= (struct thread_info
*) entry
;
2999 thread
->last_resume_kind
= resume_stop
;
3001 if (thread
->last_status
.kind
== TARGET_WAITKIND_IGNORE
)
3003 /* Most threads are stopped implicitly (all-stop); tag that with
3005 thread
->last_status
.kind
= TARGET_WAITKIND_STOPPED
;
3006 thread
->last_status
.value
.sig
= GDB_SIGNAL_0
;
3010 /* Set all threads' states as "want-stopped". */
3013 gdb_wants_all_threads_stopped (void)
3015 for_each_inferior (&all_threads
, gdb_wants_thread_stopped
);
3018 /* Clear the gdb_detached flag of every process. */
3021 gdb_reattached_process (struct inferior_list_entry
*entry
)
3023 struct process_info
*process
= (struct process_info
*) entry
;
3025 process
->gdb_detached
= 0;
3028 /* Callback for for_each_inferior. Clear the thread's pending status
3032 clear_pending_status_callback (struct inferior_list_entry
*entry
)
3034 struct thread_info
*thread
= (struct thread_info
*) entry
;
3036 thread
->status_pending_p
= 0;
3039 /* Callback for for_each_inferior. If the thread is stopped with an
3040 interesting event, mark it as having a pending event. */
3043 set_pending_status_callback (struct inferior_list_entry
*entry
)
3045 struct thread_info
*thread
= (struct thread_info
*) entry
;
3047 if (thread
->last_status
.kind
!= TARGET_WAITKIND_STOPPED
3048 || (thread
->last_status
.value
.sig
!= GDB_SIGNAL_0
3049 /* A breakpoint, watchpoint or finished step from a previous
3050 GDB run isn't considered interesting for a new GDB run.
3051 If we left those pending, the new GDB could consider them
3052 random SIGTRAPs. This leaves out real async traps. We'd
3053 have to peek into the (target-specific) siginfo to
3054 distinguish those. */
3055 && thread
->last_status
.value
.sig
!= GDB_SIGNAL_TRAP
))
3056 thread
->status_pending_p
= 1;
3059 /* Callback for find_inferior. Return true if ENTRY (a thread) has a
3060 pending status to report to GDB. */
3063 find_status_pending_thread_callback (struct inferior_list_entry
*entry
, void *data
)
3065 struct thread_info
*thread
= (struct thread_info
*) entry
;
3067 return thread
->status_pending_p
;
3070 /* Status handler for the '?' packet. */
3073 handle_status (char *own_buf
)
3075 /* GDB is connected, don't forward events to the target anymore. */
3076 for_each_inferior (&all_processes
, gdb_reattached_process
);
3078 /* In non-stop mode, we must send a stop reply for each stopped
3079 thread. In all-stop mode, just send one for the first stopped
3084 find_inferior (&all_threads
, queue_stop_reply_callback
, NULL
);
3086 /* The first is sent immediatly. OK is sent if there is no
3087 stopped thread, which is the same handling of the vStopped
3088 packet (by design). */
3089 notif_write_event (¬if_stop
, own_buf
);
3093 struct inferior_list_entry
*thread
= NULL
;
3096 stabilize_threads ();
3097 gdb_wants_all_threads_stopped ();
3099 /* We can only report one status, but we might be coming out of
3100 non-stop -- if more than one thread is stopped with
3101 interesting events, leave events for the threads we're not
3102 reporting now pending. They'll be reported the next time the
3103 threads are resumed. Start by marking all interesting events
3105 for_each_inferior (&all_threads
, set_pending_status_callback
);
3107 /* Prefer the last thread that reported an event to GDB (even if
3108 that was a GDB_SIGNAL_TRAP). */
3109 if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
3110 && last_status
.kind
!= TARGET_WAITKIND_EXITED
3111 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
3112 thread
= find_inferior_id (&all_threads
, last_ptid
);
3114 /* If the last event thread is not found for some reason, look
3115 for some other thread that might have an event to report. */
3117 thread
= find_inferior (&all_threads
,
3118 find_status_pending_thread_callback
, NULL
);
3120 /* If we're still out of luck, simply pick the first thread in
3123 thread
= get_first_inferior (&all_threads
);
3127 struct thread_info
*tp
= (struct thread_info
*) thread
;
3129 /* We're reporting this event, so it's no longer
3131 tp
->status_pending_p
= 0;
3133 /* GDB assumes the current thread is the thread we're
3134 reporting the status for. */
3135 general_thread
= thread
->id
;
3136 set_desired_thread (1);
3138 gdb_assert (tp
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3139 prepare_resume_reply (own_buf
, tp
->entry
.id
, &tp
->last_status
);
3142 strcpy (own_buf
, "W00");
3147 gdbserver_version (void)
3149 printf ("GNU gdbserver %s%s\n"
3150 "Copyright (C) 2015 Free Software Foundation, Inc.\n"
3151 "gdbserver is free software, covered by the "
3152 "GNU General Public License.\n"
3153 "This gdbserver was configured as \"%s\"\n",
3154 PKGVERSION
, version
, host_name
);
3158 gdbserver_usage (FILE *stream
)
3160 fprintf (stream
, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
3161 "\tgdbserver [OPTIONS] --attach COMM PID\n"
3162 "\tgdbserver [OPTIONS] --multi COMM\n"
3164 "COMM may either be a tty device (for serial debugging),\n"
3165 "HOST:PORT to listen for a TCP connection, or '-' or 'stdio' to use \n"
3166 "stdin/stdout of gdbserver.\n"
3167 "PROG is the executable program. ARGS are arguments passed to inferior.\n"
3168 "PID is the process ID to attach to, when --attach is specified.\n"
3170 "Operating modes:\n"
3172 " --attach Attach to running process PID.\n"
3173 " --multi Start server without a specific program, and\n"
3174 " only quit when explicitly commanded.\n"
3175 " --once Exit after the first connection has closed.\n"
3176 " --help Print this message and then exit.\n"
3177 " --version Display version information and exit.\n"
3181 " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n"
3182 " --disable-randomization\n"
3183 " Run PROG with address space randomization disabled.\n"
3184 " --no-disable-randomization\n"
3185 " Don't disable address space randomization when\n"
3190 " --debug Enable general debugging output.\n"
3191 " --debug-format=opt1[,opt2,...]\n"
3192 " Specify extra content in debugging output.\n"
3197 " --remote-debug Enable remote protocol debugging output.\n"
3198 " --disable-packet=opt1[,opt2,...]\n"
3199 " Disable support for RSP packets or features.\n"
3201 " vCont, Tthread, qC, qfThreadInfo and \n"
3202 " threads (disable all threading packets).\n"
3204 "For more information, consult the GDB manual (available as on-line \n"
3205 "info or a printed manual).\n");
3206 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
3207 fprintf (stream
, "Report bugs to \"%s\".\n", REPORT_BUGS_TO
);
3211 gdbserver_show_disableable (FILE *stream
)
3213 fprintf (stream
, "Disableable packets:\n"
3214 " vCont \tAll vCont packets\n"
3215 " qC \tQuerying the current thread\n"
3216 " qfThreadInfo\tThread listing\n"
3217 " Tthread \tPassing the thread specifier in the "
3218 "T stop reply packet\n"
3219 " threads \tAll of the above\n");
3223 #undef require_running
3224 #define require_running(BUF) \
3225 if (!target_running ()) \
3232 first_thread_of (struct inferior_list_entry
*entry
, void *args
)
3234 int pid
= * (int *) args
;
3236 if (ptid_get_pid (entry
->id
) == pid
)
3243 kill_inferior_callback (struct inferior_list_entry
*entry
)
3245 struct process_info
*process
= (struct process_info
*) entry
;
3246 int pid
= ptid_get_pid (process
->entry
.id
);
3248 kill_inferior (pid
);
3249 discard_queued_stop_replies (pid_to_ptid (pid
));
3252 /* Callback for for_each_inferior to detach or kill the inferior,
3253 depending on whether we attached to it or not.
3254 We inform the user whether we're detaching or killing the process
3255 as this is only called when gdbserver is about to exit. */
3258 detach_or_kill_inferior_callback (struct inferior_list_entry
*entry
)
3260 struct process_info
*process
= (struct process_info
*) entry
;
3261 int pid
= ptid_get_pid (process
->entry
.id
);
3263 if (process
->attached
)
3264 detach_inferior (pid
);
3266 kill_inferior (pid
);
3268 discard_queued_stop_replies (pid_to_ptid (pid
));
3271 /* for_each_inferior callback for detach_or_kill_for_exit to print
3272 the pids of started inferiors. */
3275 print_started_pid (struct inferior_list_entry
*entry
)
3277 struct process_info
*process
= (struct process_info
*) entry
;
3279 if (! process
->attached
)
3281 int pid
= ptid_get_pid (process
->entry
.id
);
3282 fprintf (stderr
, " %d", pid
);
3286 /* for_each_inferior callback for detach_or_kill_for_exit to print
3287 the pids of attached inferiors. */
3290 print_attached_pid (struct inferior_list_entry
*entry
)
3292 struct process_info
*process
= (struct process_info
*) entry
;
3294 if (process
->attached
)
3296 int pid
= ptid_get_pid (process
->entry
.id
);
3297 fprintf (stderr
, " %d", pid
);
3301 /* Call this when exiting gdbserver with possible inferiors that need
3302 to be killed or detached from. */
3305 detach_or_kill_for_exit (void)
3307 /* First print a list of the inferiors we will be killing/detaching.
3308 This is to assist the user, for example, in case the inferior unexpectedly
3309 dies after we exit: did we screw up or did the inferior exit on its own?
3310 Having this info will save some head-scratching. */
3312 if (have_started_inferiors_p ())
3314 fprintf (stderr
, "Killing process(es):");
3315 for_each_inferior (&all_processes
, print_started_pid
);
3316 fprintf (stderr
, "\n");
3318 if (have_attached_inferiors_p ())
3320 fprintf (stderr
, "Detaching process(es):");
3321 for_each_inferior (&all_processes
, print_attached_pid
);
3322 fprintf (stderr
, "\n");
3325 /* Now we can kill or detach the inferiors. */
3327 for_each_inferior (&all_processes
, detach_or_kill_inferior_callback
);
3330 /* Value that will be passed to exit(3) when gdbserver exits. */
3331 static int exit_code
;
3333 /* Cleanup version of detach_or_kill_for_exit. */
3336 detach_or_kill_for_exit_cleanup (void *ignore
)
3341 detach_or_kill_for_exit ();
3344 CATCH (exception
, RETURN_MASK_ALL
)
3347 fprintf (stderr
, "Detach or kill failed: %s\n", exception
.message
);
3353 /* Main function. This is called by the real "main" function,
3354 wrapped in a TRY_CATCH that handles any uncaught exceptions. */
3356 static void ATTRIBUTE_NORETURN
3357 captured_main (int argc
, char *argv
[])
3361 char *arg_end
, *port
;
3362 char **next_arg
= &argv
[1];
3363 volatile int multi_mode
= 0;
3364 volatile int attach
= 0;
3367 while (*next_arg
!= NULL
&& **next_arg
== '-')
3369 if (strcmp (*next_arg
, "--version") == 0)
3371 gdbserver_version ();
3374 else if (strcmp (*next_arg
, "--help") == 0)
3376 gdbserver_usage (stdout
);
3379 else if (strcmp (*next_arg
, "--attach") == 0)
3381 else if (strcmp (*next_arg
, "--multi") == 0)
3383 else if (strcmp (*next_arg
, "--wrapper") == 0)
3387 wrapper_argv
= next_arg
;
3388 while (*next_arg
!= NULL
&& strcmp (*next_arg
, "--") != 0)
3391 if (next_arg
== wrapper_argv
|| *next_arg
== NULL
)
3393 gdbserver_usage (stderr
);
3397 /* Consume the "--". */
3400 else if (strcmp (*next_arg
, "--debug") == 0)
3402 else if (startswith (*next_arg
, "--debug-format="))
3405 = parse_debug_format_options ((*next_arg
)
3406 + sizeof ("--debug-format=") - 1, 0);
3408 if (error_msg
!= NULL
)
3410 fprintf (stderr
, "%s", error_msg
);
3414 else if (strcmp (*next_arg
, "--remote-debug") == 0)
3416 else if (strcmp (*next_arg
, "--disable-packet") == 0)
3418 gdbserver_show_disableable (stdout
);
3421 else if (startswith (*next_arg
, "--disable-packet="))
3423 char *packets
, *tok
;
3425 packets
= *next_arg
+= sizeof ("--disable-packet=") - 1;
3426 for (tok
= strtok (packets
, ",");
3428 tok
= strtok (NULL
, ","))
3430 if (strcmp ("vCont", tok
) == 0)
3431 disable_packet_vCont
= 1;
3432 else if (strcmp ("Tthread", tok
) == 0)
3433 disable_packet_Tthread
= 1;
3434 else if (strcmp ("qC", tok
) == 0)
3435 disable_packet_qC
= 1;
3436 else if (strcmp ("qfThreadInfo", tok
) == 0)
3437 disable_packet_qfThreadInfo
= 1;
3438 else if (strcmp ("threads", tok
) == 0)
3440 disable_packet_vCont
= 1;
3441 disable_packet_Tthread
= 1;
3442 disable_packet_qC
= 1;
3443 disable_packet_qfThreadInfo
= 1;
3447 fprintf (stderr
, "Don't know how to disable \"%s\".\n\n",
3449 gdbserver_show_disableable (stderr
);
3454 else if (strcmp (*next_arg
, "-") == 0)
3456 /* "-" specifies a stdio connection and is a form of port
3458 *next_arg
= STDIO_CONNECTION_NAME
;
3461 else if (strcmp (*next_arg
, "--disable-randomization") == 0)
3462 disable_randomization
= 1;
3463 else if (strcmp (*next_arg
, "--no-disable-randomization") == 0)
3464 disable_randomization
= 0;
3465 else if (strcmp (*next_arg
, "--once") == 0)
3469 fprintf (stderr
, "Unknown argument: %s\n", *next_arg
);
3479 if (port
== NULL
|| (!attach
&& !multi_mode
&& *next_arg
== NULL
))
3481 gdbserver_usage (stderr
);
3485 /* Remember stdio descriptors. LISTEN_DESC must not be listed, it will be
3486 opened by remote_prepare. */
3489 /* We need to know whether the remote connection is stdio before
3490 starting the inferior. Inferiors created in this scenario have
3491 stdin,stdout redirected. So do this here before we call
3493 remote_prepare (port
);
3498 /* --attach used to come after PORT, so allow it there for
3500 if (*next_arg
!= NULL
&& strcmp (*next_arg
, "--attach") == 0)
3507 && (*next_arg
== NULL
3508 || (*next_arg
)[0] == '\0'
3509 || (pid
= strtoul (*next_arg
, &arg_end
, 0)) == 0
3511 || next_arg
[1] != NULL
))
3516 gdbserver_usage (stderr
);
3520 initialize_async_io ();
3522 initialize_event_loop ();
3523 if (target_supports_tracepoints ())
3524 initialize_tracepoint ();
3525 initialize_notif ();
3527 own_buf
= xmalloc (PBUFSIZ
+ 1);
3528 mem_buf
= xmalloc (PBUFSIZ
);
3530 if (pid
== 0 && *next_arg
!= NULL
)
3534 n
= argc
- (next_arg
- argv
);
3535 program_argv
= xmalloc (sizeof (char *) * (n
+ 1));
3536 for (i
= 0; i
< n
; i
++)
3537 program_argv
[i
] = xstrdup (next_arg
[i
]);
3538 program_argv
[i
] = NULL
;
3540 /* Wait till we are at first instruction in program. */
3541 start_inferior (program_argv
);
3543 /* We are now (hopefully) stopped at the first instruction of
3544 the target process. This assumes that the target process was
3545 successfully created. */
3549 if (attach_inferior (pid
) == -1)
3550 error ("Attaching not supported on this target");
3552 /* Otherwise succeeded. */
3556 last_status
.kind
= TARGET_WAITKIND_EXITED
;
3557 last_status
.value
.integer
= 0;
3558 last_ptid
= minus_one_ptid
;
3560 make_cleanup (detach_or_kill_for_exit_cleanup
, NULL
);
3562 /* Don't report shared library events on the initial connection,
3563 even if some libraries are preloaded. Avoids the "stopped by
3564 shared library event" notice on gdb side. */
3567 if (last_status
.kind
== TARGET_WAITKIND_EXITED
3568 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
3573 if (!was_running
&& !multi_mode
)
3574 error ("No program to debug");
3581 report_fork_events
= 0;
3582 report_vfork_events
= 0;
3583 report_exec_events
= 0;
3584 /* Be sure we're out of tfind mode. */
3585 current_traceframe
= -1;
3586 cont_thread
= null_ptid
;
3587 swbreak_feature
= 0;
3588 hwbreak_feature
= 0;
3589 vCont_supported
= 0;
3595 /* Wait for events. This will return when all event sources
3596 are removed from the event loop. */
3597 start_event_loop ();
3599 /* If an exit was requested (using the "monitor exit"
3600 command), terminate now. The only other way to get
3601 here is for getpkt to fail; close the connection
3602 and reopen it at the top of the loop. */
3604 if (exit_requested
|| run_once
)
3605 throw_quit ("Quit");
3608 "Remote side has terminated connection. "
3609 "GDBserver will reopen the connection.\n");
3611 /* Get rid of any pending statuses. An eventual reconnection
3612 (by the same GDB instance or another) will refresh all its
3613 state from scratch. */
3614 discard_queued_stop_replies (minus_one_ptid
);
3615 for_each_inferior (&all_threads
,
3616 clear_pending_status_callback
);
3620 if (disconnected_tracing
)
3622 /* Try to enable non-stop/async mode, so we we can
3623 both wait for an async socket accept, and handle
3624 async target events simultaneously. There's also
3625 no point either in having the target always stop
3626 all threads, when we're going to pass signals
3627 down without informing GDB. */
3630 if (start_non_stop (1))
3633 /* Detaching implicitly resumes all threads;
3634 simply disconnecting does not. */
3640 "Disconnected tracing disabled; "
3641 "stopping trace run.\n");
3646 CATCH (exception
, RETURN_MASK_ERROR
)
3649 fprintf (stderr
, "gdbserver: %s\n", exception
.message
);
3651 if (response_needed
)
3653 write_enn (own_buf
);
3658 throw_quit ("Quit");
3664 /* Main function. */
3667 main (int argc
, char *argv
[])
3672 captured_main (argc
, argv
);
3674 CATCH (exception
, RETURN_MASK_ALL
)
3676 if (exception
.reason
== RETURN_ERROR
)
3679 fprintf (stderr
, "%s\n", exception
.message
);
3680 fprintf (stderr
, "Exiting\n");
3688 gdb_assert_not_reached ("captured_main should never return");
3691 /* Skip PACKET until the next semi-colon (or end of string). */
3694 skip_to_semicolon (char **packet
)
3696 while (**packet
!= '\0' && **packet
!= ';')
3700 /* Process options coming from Z packets for a breakpoint. PACKET is
3701 the packet buffer. *PACKET is updated to point to the first char
3702 after the last processed option. */
3705 process_point_options (struct breakpoint
*bp
, char **packet
)
3707 char *dataptr
= *packet
;
3710 /* Check if data has the correct format. */
3711 if (*dataptr
!= ';')
3718 if (*dataptr
== ';')
3721 if (*dataptr
== 'X')
3723 /* Conditional expression. */
3725 debug_printf ("Found breakpoint condition.\n");
3726 if (!add_breakpoint_condition (bp
, &dataptr
))
3727 skip_to_semicolon (&dataptr
);
3729 else if (startswith (dataptr
, "cmds:"))
3731 dataptr
+= strlen ("cmds:");
3733 debug_printf ("Found breakpoint commands %s.\n", dataptr
);
3734 persist
= (*dataptr
== '1');
3736 if (add_breakpoint_commands (bp
, &dataptr
, persist
))
3737 skip_to_semicolon (&dataptr
);
3741 fprintf (stderr
, "Unknown token %c, ignoring.\n",
3743 /* Skip tokens until we find one that we recognize. */
3744 skip_to_semicolon (&dataptr
);
3750 /* Event loop callback that handles a serial event. The first byte in
3751 the serial buffer gets us here. We expect characters to arrive at
3752 a brisk pace, so we read the rest of the packet with a blocking
3756 process_serial_event (void)
3767 int new_packet_len
= -1;
3769 /* Used to decide when gdbserver should exit in
3770 multi-mode/remote. */
3771 static int have_ran
= 0;
3774 have_ran
= target_running ();
3776 disable_async_io ();
3778 response_needed
= 0;
3779 packet_len
= getpkt (own_buf
);
3780 if (packet_len
<= 0)
3783 /* Force an event loop break. */
3786 response_needed
= 1;
3793 handle_query (own_buf
, packet_len
, &new_packet_len
);
3796 handle_general_set (own_buf
);
3799 require_running (own_buf
);
3804 pid
= strtol (&own_buf
[i
], NULL
, 16);
3807 pid
= ptid_get_pid (current_ptid
);
3809 if ((tracing
&& disconnected_tracing
) || any_persistent_commands ())
3811 struct thread_resume resume_info
;
3812 struct process_info
*process
= find_process_pid (pid
);
3814 if (process
== NULL
)
3816 write_enn (own_buf
);
3820 if (tracing
&& disconnected_tracing
)
3822 "Disconnected tracing in effect, "
3823 "leaving gdbserver attached to the process\n");
3825 if (any_persistent_commands ())
3827 "Persistent commands are present, "
3828 "leaving gdbserver attached to the process\n");
3830 /* Make sure we're in non-stop/async mode, so we we can both
3831 wait for an async socket accept, and handle async target
3832 events simultaneously. There's also no point either in
3833 having the target stop all threads, when we're going to
3834 pass signals down without informing GDB. */
3838 debug_printf ("Forcing non-stop mode\n");
3844 process
->gdb_detached
= 1;
3846 /* Detaching implicitly resumes all threads. */
3847 resume_info
.thread
= minus_one_ptid
;
3848 resume_info
.kind
= resume_continue
;
3849 resume_info
.sig
= 0;
3850 (*the_target
->resume
) (&resume_info
, 1);
3853 break; /* from switch/case */
3856 fprintf (stderr
, "Detaching from process %d\n", pid
);
3858 if (detach_inferior (pid
) != 0)
3859 write_enn (own_buf
);
3862 discard_queued_stop_replies (pid_to_ptid (pid
));
3865 if (extended_protocol
)
3867 /* Treat this like a normal program exit. */
3868 last_status
.kind
= TARGET_WAITKIND_EXITED
;
3869 last_status
.value
.integer
= 0;
3870 last_ptid
= pid_to_ptid (pid
);
3872 current_thread
= NULL
;
3879 /* If we are attached, then we can exit. Otherwise, we
3880 need to hang around doing nothing, until the child is
3882 join_inferior (pid
);
3888 extended_protocol
= 1;
3892 handle_status (own_buf
);
3895 if (own_buf
[1] == 'c' || own_buf
[1] == 'g' || own_buf
[1] == 's')
3897 ptid_t gdb_id
, thread_id
;
3900 require_running (own_buf
);
3902 gdb_id
= read_ptid (&own_buf
[2], NULL
);
3904 pid
= ptid_get_pid (gdb_id
);
3906 if (ptid_equal (gdb_id
, null_ptid
)
3907 || ptid_equal (gdb_id
, minus_one_ptid
))
3908 thread_id
= null_ptid
;
3910 && ptid_equal (pid_to_ptid (pid
),
3913 struct thread_info
*thread
=
3914 (struct thread_info
*) find_inferior (&all_threads
,
3919 write_enn (own_buf
);
3923 thread_id
= thread
->entry
.id
;
3927 thread_id
= gdb_id_to_thread_id (gdb_id
);
3928 if (ptid_equal (thread_id
, null_ptid
))
3930 write_enn (own_buf
);
3935 if (own_buf
[1] == 'g')
3937 if (ptid_equal (thread_id
, null_ptid
))
3939 /* GDB is telling us to choose any thread. Check if
3940 the currently selected thread is still valid. If
3941 it is not, select the first available. */
3942 struct thread_info
*thread
=
3943 (struct thread_info
*) find_inferior_id (&all_threads
,
3946 thread
= get_first_thread ();
3947 thread_id
= thread
->entry
.id
;
3950 general_thread
= thread_id
;
3951 set_desired_thread (1);
3952 gdb_assert (current_thread
!= NULL
);
3954 else if (own_buf
[1] == 'c')
3955 cont_thread
= thread_id
;
3961 /* Silently ignore it so that gdb can extend the protocol
3962 without compatibility headaches. */
3967 require_running (own_buf
);
3968 if (current_traceframe
>= 0)
3970 struct regcache
*regcache
3971 = new_register_cache (current_target_desc ());
3973 if (fetch_traceframe_registers (current_traceframe
,
3975 registers_to_string (regcache
, own_buf
);
3977 write_enn (own_buf
);
3978 free_register_cache (regcache
);
3982 struct regcache
*regcache
;
3984 if (!set_desired_thread (1))
3985 write_enn (own_buf
);
3988 regcache
= get_thread_regcache (current_thread
, 1);
3989 registers_to_string (regcache
, own_buf
);
3994 require_running (own_buf
);
3995 if (current_traceframe
>= 0)
3996 write_enn (own_buf
);
3999 struct regcache
*regcache
;
4001 if (!set_desired_thread (1))
4002 write_enn (own_buf
);
4005 regcache
= get_thread_regcache (current_thread
, 1);
4006 registers_from_string (regcache
, &own_buf
[1]);
4012 require_running (own_buf
);
4013 decode_m_packet (&own_buf
[1], &mem_addr
, &len
);
4014 res
= gdb_read_memory (mem_addr
, mem_buf
, len
);
4016 write_enn (own_buf
);
4018 bin2hex (mem_buf
, own_buf
, res
);
4021 require_running (own_buf
);
4022 decode_M_packet (&own_buf
[1], &mem_addr
, &len
, &mem_buf
);
4023 if (gdb_write_memory (mem_addr
, mem_buf
, len
) == 0)
4026 write_enn (own_buf
);
4029 require_running (own_buf
);
4030 if (decode_X_packet (&own_buf
[1], packet_len
- 1,
4031 &mem_addr
, &len
, &mem_buf
) < 0
4032 || gdb_write_memory (mem_addr
, mem_buf
, len
) != 0)
4033 write_enn (own_buf
);
4038 require_running (own_buf
);
4039 hex2bin (own_buf
+ 1, &sig
, 1);
4040 if (gdb_signal_to_host_p (sig
))
4041 signal
= gdb_signal_to_host (sig
);
4044 myresume (own_buf
, 0, signal
);
4047 require_running (own_buf
);
4048 hex2bin (own_buf
+ 1, &sig
, 1);
4049 if (gdb_signal_to_host_p (sig
))
4050 signal
= gdb_signal_to_host (sig
);
4053 myresume (own_buf
, 1, signal
);
4056 require_running (own_buf
);
4058 myresume (own_buf
, 0, signal
);
4061 require_running (own_buf
);
4063 myresume (own_buf
, 1, signal
);
4065 case 'Z': /* insert_ ... */
4067 case 'z': /* remove_ ... */
4072 char type
= own_buf
[1];
4074 const int insert
= ch
== 'Z';
4075 char *p
= &own_buf
[3];
4077 p
= unpack_varlen_hex (p
, &addr
);
4078 len
= strtol (p
+ 1, &dataptr
, 16);
4082 struct breakpoint
*bp
;
4084 bp
= set_gdb_breakpoint (type
, addr
, len
, &res
);
4089 /* GDB may have sent us a list of *point parameters to
4090 be evaluated on the target's side. Read such list
4091 here. If we already have a list of parameters, GDB
4092 is telling us to drop that list and use this one
4094 clear_breakpoint_conditions_and_commands (bp
);
4095 process_point_options (bp
, &dataptr
);
4099 res
= delete_gdb_breakpoint (type
, addr
, len
);
4107 write_enn (own_buf
);
4111 response_needed
= 0;
4112 if (!target_running ())
4113 /* The packet we received doesn't make sense - but we can't
4114 reply to it, either. */
4117 fprintf (stderr
, "Killing all inferiors\n");
4118 for_each_inferior (&all_processes
, kill_inferior_callback
);
4120 /* When using the extended protocol, we wait with no program
4121 running. The traditional protocol will exit instead. */
4122 if (extended_protocol
)
4124 last_status
.kind
= TARGET_WAITKIND_EXITED
;
4125 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4133 ptid_t gdb_id
, thread_id
;
4135 require_running (own_buf
);
4137 gdb_id
= read_ptid (&own_buf
[1], NULL
);
4138 thread_id
= gdb_id_to_thread_id (gdb_id
);
4139 if (ptid_equal (thread_id
, null_ptid
))
4141 write_enn (own_buf
);
4145 if (mythread_alive (thread_id
))
4148 write_enn (own_buf
);
4152 response_needed
= 0;
4154 /* Restarting the inferior is only supported in the extended
4156 if (extended_protocol
)
4158 if (target_running ())
4159 for_each_inferior (&all_processes
,
4160 kill_inferior_callback
);
4161 fprintf (stderr
, "GDBserver restarting\n");
4163 /* Wait till we are at 1st instruction in prog. */
4164 if (program_argv
!= NULL
)
4166 start_inferior (program_argv
);
4167 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4169 /* Stopped at the first instruction of the target
4171 general_thread
= last_ptid
;
4175 /* Something went wrong. */
4176 general_thread
= null_ptid
;
4181 last_status
.kind
= TARGET_WAITKIND_EXITED
;
4182 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4188 /* It is a request we don't understand. Respond with an
4189 empty packet so that gdb knows that we don't support this
4195 /* Extended (long) request. */
4196 handle_v_requests (own_buf
, packet_len
, &new_packet_len
);
4200 /* It is a request we don't understand. Respond with an empty
4201 packet so that gdb knows that we don't support this
4207 if (new_packet_len
!= -1)
4208 putpkt_binary (own_buf
, new_packet_len
);
4212 response_needed
= 0;
4214 if (!extended_protocol
&& have_ran
&& !target_running ())
4216 /* In non-stop, defer exiting until GDB had a chance to query
4217 the whole vStopped list (until it gets an OK). */
4218 if (QUEUE_is_empty (notif_event_p
, notif_stop
.queue
))
4220 /* Be transparent when GDB is connected through stdio -- no
4221 need to spam GDB's console. */
4222 if (!remote_connection_is_stdio ())
4223 fprintf (stderr
, "GDBserver exiting\n");
4235 /* Event-loop callback for serial events. */
4238 handle_serial_event (int err
, gdb_client_data client_data
)
4241 debug_printf ("handling possible serial event\n");
4243 /* Really handle it. */
4244 if (process_serial_event () < 0)
4247 /* Be sure to not change the selected thread behind GDB's back.
4248 Important in the non-stop mode asynchronous protocol. */
4249 set_desired_thread (1);
4254 /* Event-loop callback for target events. */
4257 handle_target_event (int err
, gdb_client_data client_data
)
4260 debug_printf ("handling possible target event\n");
4262 last_ptid
= mywait (minus_one_ptid
, &last_status
,
4265 if (last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
)
4267 /* No RSP support for this yet. */
4269 else if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
)
4271 int pid
= ptid_get_pid (last_ptid
);
4272 struct process_info
*process
= find_process_pid (pid
);
4273 int forward_event
= !gdb_connected () || process
->gdb_detached
;
4275 if (last_status
.kind
== TARGET_WAITKIND_EXITED
4276 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
4278 mark_breakpoints_out (process
);
4279 mourn_inferior (process
);
4283 /* We're reporting this thread as stopped. Update its
4284 "want-stopped" state to what the client wants, until it
4285 gets a new resume action. */
4286 current_thread
->last_resume_kind
= resume_stop
;
4287 current_thread
->last_status
= last_status
;
4292 if (!target_running ())
4294 /* The last process exited. We're done. */
4298 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4300 /* A thread stopped with a signal, but gdb isn't
4301 connected to handle it. Pass it down to the
4302 inferior, as if it wasn't being traced. */
4303 struct thread_resume resume_info
;
4306 debug_printf ("GDB not connected; forwarding event %d for"
4308 (int) last_status
.kind
,
4309 target_pid_to_str (last_ptid
));
4311 resume_info
.thread
= last_ptid
;
4312 resume_info
.kind
= resume_continue
;
4313 resume_info
.sig
= gdb_signal_to_host (last_status
.value
.sig
);
4314 (*the_target
->resume
) (&resume_info
, 1);
4316 else if (debug_threads
)
4317 debug_printf ("GDB not connected; ignoring event %d for [%s]\n",
4318 (int) last_status
.kind
,
4319 target_pid_to_str (last_ptid
));
4323 struct vstop_notif
*vstop_notif
= XNEW (struct vstop_notif
);
4325 vstop_notif
->status
= last_status
;
4326 vstop_notif
->ptid
= last_ptid
;
4327 /* Push Stop notification. */
4328 notif_push (¬if_stop
,
4329 (struct notif_event
*) vstop_notif
);
4333 /* Be sure to not change the selected thread behind GDB's back.
4334 Important in the non-stop mode asynchronous protocol. */
4335 set_desired_thread (1);