1 /* Main code for remote server for GDB.
2 Copyright (C) 1989-2013 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "gdbthread.h"
32 /* The thread set with an `Hc' packet. `Hc' is deprecated in favor of
33 `vCont'. Note the multi-process extensions made `vCont' a
34 requirement, so `Hc pPID.TID' is pretty much undefined. So
35 CONT_THREAD can be null_ptid for no `Hc' thread, minus_one_ptid for
36 resuming all threads of the process (again, `Hc' isn't used for
37 multi-process), or a specific thread ptid_t.
39 We also set this when handling a single-thread `vCont' resume, as
40 some places in the backends check it to know when (and for which
41 thread) single-thread scheduler-locking is in effect. */
44 /* The thread set with an `Hg' packet. */
45 ptid_t general_thread
;
49 static int extended_protocol
;
50 static int response_needed
;
51 static int exit_requested
;
53 /* --once: Exit after the first connection has closed. */
59 /* Whether we should attempt to disable the operating system's address
60 space randomization feature before starting an inferior. */
61 int disable_randomization
= 1;
63 static char **program_argv
, **wrapper_argv
;
65 /* Enable miscellaneous debugging output. The name is historical - it
66 was originally used to debug LinuxThreads support. */
69 /* Enable debugging of h/w breakpoint/watchpoint support. */
72 int pass_signals
[GDB_SIGNAL_LAST
];
73 int program_signals
[GDB_SIGNAL_LAST
];
74 int program_signals_p
;
78 const char *gdbserver_xmltarget
;
80 /* The PID of the originally created or attached inferior. Used to
81 send signals to the process when GDB sends us an asynchronous interrupt
82 (user hitting Control-C in the client), and to wait for the child to exit
83 when no longer debugging it. */
85 unsigned long signal_pid
;
88 /* A file descriptor for the controlling terminal. */
91 /* TERMINAL_FD's original foreground group. */
92 pid_t old_foreground_pgrp
;
94 /* Hand back terminal ownership to the original foreground group. */
97 restore_old_foreground_pgrp (void)
99 tcsetpgrp (terminal_fd
, old_foreground_pgrp
);
103 /* Set if you want to disable optional thread related packets support
104 in gdbserver, for the sake of testing GDB against stubs that don't
106 int disable_packet_vCont
;
107 int disable_packet_Tthread
;
108 int disable_packet_qC
;
109 int disable_packet_qfThreadInfo
;
111 /* Last status reported to GDB. */
112 static struct target_waitstatus last_status
;
113 static ptid_t last_ptid
;
115 static char *own_buf
;
116 static unsigned char *mem_buf
;
118 /* A sub-class of 'struct notif_event' for stop, holding information
119 relative to a single stop reply. We keep a queue of these to
120 push to GDB in non-stop mode. */
124 struct notif_event base
;
126 /* Thread or process that got the event. */
130 struct target_waitstatus status
;
133 DEFINE_QUEUE_P (notif_event_p
);
135 /* Put a stop reply to the stop reply queue. */
138 queue_stop_reply (ptid_t ptid
, struct target_waitstatus
*status
)
140 struct vstop_notif
*new_notif
= xmalloc (sizeof (*new_notif
));
142 new_notif
->ptid
= ptid
;
143 new_notif
->status
= *status
;
145 notif_event_enque (¬if_stop
, (struct notif_event
*) new_notif
);
149 remove_all_on_match_pid (QUEUE (notif_event_p
) *q
,
150 QUEUE_ITER (notif_event_p
) *iter
,
151 struct notif_event
*event
,
157 || ptid_get_pid (((struct vstop_notif
*) event
)->ptid
) == *pid
)
159 if (q
->free_func
!= NULL
)
160 q
->free_func (event
);
162 QUEUE_remove_elem (notif_event_p
, q
, iter
);
168 /* Get rid of the currently pending stop replies for PID. If PID is
169 -1, then apply to all processes. */
172 discard_queued_stop_replies (int pid
)
174 QUEUE_iterate (notif_event_p
, notif_stop
.queue
,
175 remove_all_on_match_pid
, &pid
);
179 vstop_notif_reply (struct notif_event
*event
, char *own_buf
)
181 struct vstop_notif
*vstop
= (struct vstop_notif
*) event
;
183 prepare_resume_reply (own_buf
, vstop
->ptid
, &vstop
->status
);
186 struct notif_server notif_stop
=
188 "vStopped", "Stop", NULL
, vstop_notif_reply
,
192 target_running (void)
194 return all_threads
.head
!= NULL
;
198 start_inferior (char **argv
)
200 char **new_argv
= argv
;
202 if (wrapper_argv
!= NULL
)
206 for (i
= 0; wrapper_argv
[i
] != NULL
; i
++)
208 for (i
= 0; argv
[i
] != NULL
; i
++)
210 new_argv
= alloca (sizeof (char *) * count
);
212 for (i
= 0; wrapper_argv
[i
] != NULL
; i
++)
213 new_argv
[count
++] = wrapper_argv
[i
];
214 for (i
= 0; argv
[i
] != NULL
; i
++)
215 new_argv
[count
++] = argv
[i
];
216 new_argv
[count
] = NULL
;
222 for (i
= 0; new_argv
[i
]; ++i
)
223 fprintf (stderr
, "new_argv[%d] = \"%s\"\n", i
, new_argv
[i
]);
228 signal (SIGTTOU
, SIG_DFL
);
229 signal (SIGTTIN
, SIG_DFL
);
232 /* Clear this so the backend doesn't get confused, thinking
233 CONT_THREAD died, and it needs to resume all threads. */
234 cont_thread
= null_ptid
;
236 signal_pid
= create_inferior (new_argv
[0], new_argv
);
238 /* FIXME: we don't actually know at this point that the create
239 actually succeeded. We won't know that until we wait. */
240 fprintf (stderr
, "Process %s created; pid = %ld\n", argv
[0],
245 signal (SIGTTOU
, SIG_IGN
);
246 signal (SIGTTIN
, SIG_IGN
);
247 terminal_fd
= fileno (stderr
);
248 old_foreground_pgrp
= tcgetpgrp (terminal_fd
);
249 tcsetpgrp (terminal_fd
, signal_pid
);
250 atexit (restore_old_foreground_pgrp
);
253 if (wrapper_argv
!= NULL
)
255 struct thread_resume resume_info
;
257 resume_info
.thread
= pid_to_ptid (signal_pid
);
258 resume_info
.kind
= resume_continue
;
261 last_ptid
= mywait (pid_to_ptid (signal_pid
), &last_status
, 0, 0);
263 if (last_status
.kind
!= TARGET_WAITKIND_STOPPED
)
268 (*the_target
->resume
) (&resume_info
, 1);
270 last_ptid
= mywait (pid_to_ptid (signal_pid
), &last_status
, 0, 0);
271 if (last_status
.kind
!= TARGET_WAITKIND_STOPPED
)
274 current_inferior
->last_resume_kind
= resume_stop
;
275 current_inferior
->last_status
= last_status
;
277 while (last_status
.value
.sig
!= GDB_SIGNAL_TRAP
);
282 /* Wait till we are at 1st instruction in program, return new pid
283 (assuming success). */
284 last_ptid
= mywait (pid_to_ptid (signal_pid
), &last_status
, 0, 0);
286 if (last_status
.kind
!= TARGET_WAITKIND_EXITED
287 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
289 current_inferior
->last_resume_kind
= resume_stop
;
290 current_inferior
->last_status
= last_status
;
297 attach_inferior (int pid
)
299 /* myattach should return -1 if attaching is unsupported,
300 0 if it succeeded, and call error() otherwise. */
302 if (myattach (pid
) != 0)
305 fprintf (stderr
, "Attached; pid = %d\n", pid
);
308 /* FIXME - It may be that we should get the SIGNAL_PID from the
309 attach function, so that it can be the main thread instead of
310 whichever we were told to attach to. */
313 /* Clear this so the backend doesn't get confused, thinking
314 CONT_THREAD died, and it needs to resume all threads. */
315 cont_thread
= null_ptid
;
319 last_ptid
= mywait (pid_to_ptid (pid
), &last_status
, 0, 0);
321 /* GDB knows to ignore the first SIGSTOP after attaching to a running
322 process using the "attach" command, but this is different; it's
323 just using "target remote". Pretend it's just starting up. */
324 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
325 && last_status
.value
.sig
== GDB_SIGNAL_STOP
)
326 last_status
.value
.sig
= GDB_SIGNAL_TRAP
;
328 current_inferior
->last_resume_kind
= resume_stop
;
329 current_inferior
->last_status
= last_status
;
335 extern int remote_debug
;
337 /* Decode a qXfer read request. Return 0 if everything looks OK,
341 decode_xfer_read (char *buf
, CORE_ADDR
*ofs
, unsigned int *len
)
343 /* After the read marker and annex, qXfer looks like a
344 traditional 'm' packet. */
345 decode_m_packet (buf
, ofs
, len
);
351 decode_xfer (char *buf
, char **object
, char **rw
, char **annex
, char **offset
)
353 /* Extract and NUL-terminate the object. */
355 while (*buf
&& *buf
!= ':')
361 /* Extract and NUL-terminate the read/write action. */
363 while (*buf
&& *buf
!= ':')
369 /* Extract and NUL-terminate the annex. */
371 while (*buf
&& *buf
!= ':')
381 /* Write the response to a successful qXfer read. Returns the
382 length of the (binary) data stored in BUF, corresponding
383 to as much of DATA/LEN as we could fit. IS_MORE controls
384 the first character of the response. */
386 write_qxfer_response (char *buf
, const void *data
, int len
, int is_more
)
395 return remote_escape_output (data
, len
, (unsigned char *) buf
+ 1, &out_len
,
399 /* Handle all of the extended 'Q' packets. */
402 handle_general_set (char *own_buf
)
404 if (strncmp ("QPassSignals:", own_buf
, strlen ("QPassSignals:")) == 0)
406 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
407 const char *p
= own_buf
+ strlen ("QPassSignals:");
410 p
= decode_address_to_semicolon (&cursig
, p
);
411 for (i
= 0; i
< numsigs
; i
++)
417 /* Keep looping, to clear the remaining signals. */
420 p
= decode_address_to_semicolon (&cursig
, p
);
425 strcpy (own_buf
, "OK");
429 if (strncmp ("QProgramSignals:", own_buf
, strlen ("QProgramSignals:")) == 0)
431 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
432 const char *p
= own_buf
+ strlen ("QProgramSignals:");
435 program_signals_p
= 1;
437 p
= decode_address_to_semicolon (&cursig
, p
);
438 for (i
= 0; i
< numsigs
; i
++)
442 program_signals
[i
] = 1;
444 /* Keep looping, to clear the remaining signals. */
447 p
= decode_address_to_semicolon (&cursig
, p
);
450 program_signals
[i
] = 0;
452 strcpy (own_buf
, "OK");
456 if (strcmp (own_buf
, "QStartNoAckMode") == 0)
460 fprintf (stderr
, "[noack mode enabled]\n");
469 if (strncmp (own_buf
, "QNonStop:", 9) == 0)
471 char *mode
= own_buf
+ 9;
475 if (strcmp (mode
, "0") == 0)
477 else if (strcmp (mode
, "1") == 0)
481 /* We don't know what this mode is, so complain to
483 fprintf (stderr
, "Unknown non-stop mode requested: %s\n",
489 req_str
= req
? "non-stop" : "all-stop";
490 if (start_non_stop (req
) != 0)
492 fprintf (stderr
, "Setting %s mode failed\n", req_str
);
500 fprintf (stderr
, "[%s mode enabled]\n", req_str
);
506 if (strncmp ("QDisableRandomization:", own_buf
,
507 strlen ("QDisableRandomization:")) == 0)
509 char *packet
= own_buf
+ strlen ("QDisableRandomization:");
512 unpack_varlen_hex (packet
, &setting
);
513 disable_randomization
= setting
;
517 if (disable_randomization
)
518 fprintf (stderr
, "[address space randomization disabled]\n");
520 fprintf (stderr
, "[address space randomization enabled]\n");
527 if (target_supports_tracepoints ()
528 && handle_tracepoint_general_set (own_buf
))
531 if (strncmp ("QAgent:", own_buf
, strlen ("QAgent:")) == 0)
533 char *mode
= own_buf
+ strlen ("QAgent:");
536 if (strcmp (mode
, "0") == 0)
538 else if (strcmp (mode
, "1") == 0)
542 /* We don't know what this value is, so complain to GDB. */
543 sprintf (own_buf
, "E.Unknown QAgent value");
547 /* Update the flag. */
550 fprintf (stderr
, "[%s agent]\n", req
? "Enable" : "Disable");
555 /* Otherwise we didn't know what packet it was. Say we didn't
561 get_features_xml (const char *annex
)
563 /* gdbserver_xmltarget defines what to return when looking
564 for the "target.xml" file. Its contents can either be
565 verbatim XML code (prefixed with a '@') or else the name
566 of the actual XML file to be used in place of "target.xml".
568 This variable is set up from the auto-generated
569 init_registers_... routine for the current target. */
571 if (gdbserver_xmltarget
572 && strcmp (annex
, "target.xml") == 0)
574 if (*gdbserver_xmltarget
== '@')
575 return gdbserver_xmltarget
+ 1;
577 annex
= gdbserver_xmltarget
;
582 extern const char *const xml_builtin
[][2];
585 /* Look for the annex. */
586 for (i
= 0; xml_builtin
[i
][0] != NULL
; i
++)
587 if (strcmp (annex
, xml_builtin
[i
][0]) == 0)
590 if (xml_builtin
[i
][0] != NULL
)
591 return xml_builtin
[i
][1];
599 monitor_show_help (void)
601 monitor_output ("The following monitor commands are supported:\n");
602 monitor_output (" set debug <0|1>\n");
603 monitor_output (" Enable general debugging messages\n");
604 monitor_output (" set debug-hw-points <0|1>\n");
605 monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
606 monitor_output (" set remote-debug <0|1>\n");
607 monitor_output (" Enable remote protocol debugging messages\n");
608 monitor_output (" exit\n");
609 monitor_output (" Quit GDBserver\n");
612 /* Read trace frame or inferior memory. Returns the number of bytes
613 actually read, zero when no further transfer is possible, and -1 on
614 error. Return of a positive value smaller than LEN does not
615 indicate there's no more to be read, only the end of the transfer.
616 E.g., when GDB reads memory from a traceframe, a first request may
617 be served from a memory block that does not cover the whole request
618 length. A following request gets the rest served from either
619 another block (of the same traceframe) or from the read-only
623 gdb_read_memory (CORE_ADDR memaddr
, unsigned char *myaddr
, int len
)
627 if (current_traceframe
>= 0)
630 ULONGEST length
= len
;
632 if (traceframe_read_mem (current_traceframe
,
633 memaddr
, myaddr
, len
, &nbytes
))
635 /* Data read from trace buffer, we're done. */
638 if (!in_readonly_region (memaddr
, length
))
640 /* Otherwise we have a valid readonly case, fall through. */
641 /* (assume no half-trace half-real blocks for now) */
644 res
= prepare_to_access_memory ();
647 res
= read_inferior_memory (memaddr
, myaddr
, len
);
648 done_accessing_memory ();
650 return res
== 0 ? len
: -1;
656 /* Write trace frame or inferior memory. Actually, writing to trace
657 frames is forbidden. */
660 gdb_write_memory (CORE_ADDR memaddr
, const unsigned char *myaddr
, int len
)
662 if (current_traceframe
>= 0)
668 ret
= prepare_to_access_memory ();
671 ret
= write_inferior_memory (memaddr
, myaddr
, len
);
672 done_accessing_memory ();
678 /* Subroutine of handle_search_memory to simplify it. */
681 handle_search_memory_1 (CORE_ADDR start_addr
, CORE_ADDR search_space_len
,
682 gdb_byte
*pattern
, unsigned pattern_len
,
683 gdb_byte
*search_buf
,
684 unsigned chunk_size
, unsigned search_buf_size
,
685 CORE_ADDR
*found_addrp
)
687 /* Prime the search buffer. */
689 if (gdb_read_memory (start_addr
, search_buf
, search_buf_size
)
692 warning ("Unable to access %ld bytes of target "
693 "memory at 0x%lx, halting search.",
694 (long) search_buf_size
, (long) start_addr
);
698 /* Perform the search.
700 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
701 When we've scanned N bytes we copy the trailing bytes to the start and
702 read in another N bytes. */
704 while (search_space_len
>= pattern_len
)
707 unsigned nr_search_bytes
= (search_space_len
< search_buf_size
711 found_ptr
= memmem (search_buf
, nr_search_bytes
, pattern
, pattern_len
);
713 if (found_ptr
!= NULL
)
715 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
716 *found_addrp
= found_addr
;
720 /* Not found in this chunk, skip to next chunk. */
722 /* Don't let search_space_len wrap here, it's unsigned. */
723 if (search_space_len
>= chunk_size
)
724 search_space_len
-= chunk_size
;
726 search_space_len
= 0;
728 if (search_space_len
>= pattern_len
)
730 unsigned keep_len
= search_buf_size
- chunk_size
;
731 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
734 /* Copy the trailing part of the previous iteration to the front
735 of the buffer for the next iteration. */
736 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
738 nr_to_read
= (search_space_len
- keep_len
< chunk_size
739 ? search_space_len
- keep_len
742 if (gdb_read_memory (read_addr
, search_buf
+ keep_len
,
743 nr_to_read
) != search_buf_size
)
745 warning ("Unable to access %ld bytes of target memory "
746 "at 0x%lx, halting search.",
747 (long) nr_to_read
, (long) read_addr
);
751 start_addr
+= chunk_size
;
760 /* Handle qSearch:memory packets. */
763 handle_search_memory (char *own_buf
, int packet_len
)
765 CORE_ADDR start_addr
;
766 CORE_ADDR search_space_len
;
768 unsigned int pattern_len
;
769 /* NOTE: also defined in find.c testcase. */
770 #define SEARCH_CHUNK_SIZE 16000
771 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
772 /* Buffer to hold memory contents for searching. */
773 gdb_byte
*search_buf
;
774 unsigned search_buf_size
;
776 CORE_ADDR found_addr
;
777 int cmd_name_len
= sizeof ("qSearch:memory:") - 1;
779 pattern
= malloc (packet_len
);
782 error ("Unable to allocate memory to perform the search");
783 strcpy (own_buf
, "E00");
786 if (decode_search_memory_packet (own_buf
+ cmd_name_len
,
787 packet_len
- cmd_name_len
,
788 &start_addr
, &search_space_len
,
789 pattern
, &pattern_len
) < 0)
792 error ("Error in parsing qSearch:memory packet");
793 strcpy (own_buf
, "E00");
797 search_buf_size
= chunk_size
+ pattern_len
- 1;
799 /* No point in trying to allocate a buffer larger than the search space. */
800 if (search_space_len
< search_buf_size
)
801 search_buf_size
= search_space_len
;
803 search_buf
= malloc (search_buf_size
);
804 if (search_buf
== NULL
)
807 error ("Unable to allocate memory to perform the search");
808 strcpy (own_buf
, "E00");
812 found
= handle_search_memory_1 (start_addr
, search_space_len
,
813 pattern
, pattern_len
,
814 search_buf
, chunk_size
, search_buf_size
,
818 sprintf (own_buf
, "1,%lx", (long) found_addr
);
820 strcpy (own_buf
, "0");
822 strcpy (own_buf
, "E00");
828 #define require_running(BUF) \
829 if (!target_running ()) \
835 /* Handle monitor commands not handled by target-specific handlers. */
838 handle_monitor_command (char *mon
, char *own_buf
)
840 if (strcmp (mon
, "set debug 1") == 0)
843 monitor_output ("Debug output enabled.\n");
845 else if (strcmp (mon
, "set debug 0") == 0)
848 monitor_output ("Debug output disabled.\n");
850 else if (strcmp (mon
, "set debug-hw-points 1") == 0)
853 monitor_output ("H/W point debugging output enabled.\n");
855 else if (strcmp (mon
, "set debug-hw-points 0") == 0)
858 monitor_output ("H/W point debugging output disabled.\n");
860 else if (strcmp (mon
, "set remote-debug 1") == 0)
863 monitor_output ("Protocol debug output enabled.\n");
865 else if (strcmp (mon
, "set remote-debug 0") == 0)
868 monitor_output ("Protocol debug output disabled.\n");
870 else if (strcmp (mon
, "help") == 0)
871 monitor_show_help ();
872 else if (strcmp (mon
, "exit") == 0)
876 monitor_output ("Unknown monitor command.\n\n");
877 monitor_show_help ();
882 /* Associates a callback with each supported qXfer'able object. */
886 /* The object this handler handles. */
889 /* Request that the target transfer up to LEN 8-bit bytes of the
890 target's OBJECT. The OFFSET, for a seekable object, specifies
891 the starting point. The ANNEX can be used to provide additional
892 data-specific information to the target.
894 Return the number of bytes actually transfered, zero when no
895 further transfer is possible, -1 on error, and -2 when the
896 transfer is not supported. Return of a positive value smaller
897 than LEN does not indicate the end of the object, only the end of
900 One, and only one, of readbuf or writebuf must be non-NULL. */
901 int (*xfer
) (const char *annex
,
902 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
903 ULONGEST offset
, LONGEST len
);
906 /* Handle qXfer:auxv:read. */
909 handle_qxfer_auxv (const char *annex
,
910 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
911 ULONGEST offset
, LONGEST len
)
913 if (the_target
->read_auxv
== NULL
|| writebuf
!= NULL
)
916 if (annex
[0] != '\0' || !target_running ())
919 return (*the_target
->read_auxv
) (offset
, readbuf
, len
);
922 /* Handle qXfer:features:read. */
925 handle_qxfer_features (const char *annex
,
926 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
927 ULONGEST offset
, LONGEST len
)
929 const char *document
;
932 if (writebuf
!= NULL
)
935 if (!target_running ())
938 /* Grab the correct annex. */
939 document
= get_features_xml (annex
);
940 if (document
== NULL
)
943 total_len
= strlen (document
);
945 if (offset
> total_len
)
948 if (offset
+ len
> total_len
)
949 len
= total_len
- offset
;
951 memcpy (readbuf
, document
+ offset
, len
);
955 /* Handle qXfer:libraries:read. */
958 handle_qxfer_libraries (const char *annex
,
959 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
960 ULONGEST offset
, LONGEST len
)
962 unsigned int total_len
;
964 struct inferior_list_entry
*dll_ptr
;
966 if (writebuf
!= NULL
)
969 if (annex
[0] != '\0' || !target_running ())
972 /* Over-estimate the necessary memory. Assume that every character
973 in the library name must be escaped. */
975 for (dll_ptr
= all_dlls
.head
; dll_ptr
!= NULL
; dll_ptr
= dll_ptr
->next
)
976 total_len
+= 128 + 6 * strlen (((struct dll_info
*) dll_ptr
)->name
);
978 document
= malloc (total_len
);
979 if (document
== NULL
)
982 strcpy (document
, "<library-list>\n");
983 p
= document
+ strlen (document
);
985 for (dll_ptr
= all_dlls
.head
; dll_ptr
!= NULL
; dll_ptr
= dll_ptr
->next
)
987 struct dll_info
*dll
= (struct dll_info
*) dll_ptr
;
990 strcpy (p
, " <library name=\"");
992 name
= xml_escape_text (dll
->name
);
996 strcpy (p
, "\"><segment address=\"");
998 sprintf (p
, "0x%lx", (long) dll
->base_addr
);
1000 strcpy (p
, "\"/></library>\n");
1004 strcpy (p
, "</library-list>\n");
1006 total_len
= strlen (document
);
1008 if (offset
> total_len
)
1014 if (offset
+ len
> total_len
)
1015 len
= total_len
- offset
;
1017 memcpy (readbuf
, document
+ offset
, len
);
1022 /* Handle qXfer:libraries-svr4:read. */
1025 handle_qxfer_libraries_svr4 (const char *annex
,
1026 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1027 ULONGEST offset
, LONGEST len
)
1029 if (writebuf
!= NULL
)
1032 if (annex
[0] != '\0' || !target_running ()
1033 || the_target
->qxfer_libraries_svr4
== NULL
)
1036 return the_target
->qxfer_libraries_svr4 (annex
, readbuf
, writebuf
, offset
, len
);
1039 /* Handle qXfer:osadata:read. */
1042 handle_qxfer_osdata (const char *annex
,
1043 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1044 ULONGEST offset
, LONGEST len
)
1046 if (the_target
->qxfer_osdata
== NULL
|| writebuf
!= NULL
)
1049 return (*the_target
->qxfer_osdata
) (annex
, readbuf
, NULL
, offset
, len
);
1052 /* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
1055 handle_qxfer_siginfo (const char *annex
,
1056 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1057 ULONGEST offset
, LONGEST len
)
1059 if (the_target
->qxfer_siginfo
== NULL
)
1062 if (annex
[0] != '\0' || !target_running ())
1065 return (*the_target
->qxfer_siginfo
) (annex
, readbuf
, writebuf
, offset
, len
);
1068 /* Handle qXfer:spu:read and qXfer:spu:write. */
1071 handle_qxfer_spu (const char *annex
,
1072 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1073 ULONGEST offset
, LONGEST len
)
1075 if (the_target
->qxfer_spu
== NULL
)
1078 if (!target_running ())
1081 return (*the_target
->qxfer_spu
) (annex
, readbuf
, writebuf
, offset
, len
);
1084 /* Handle qXfer:statictrace:read. */
1087 handle_qxfer_statictrace (const char *annex
,
1088 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1089 ULONGEST offset
, LONGEST len
)
1093 if (writebuf
!= NULL
)
1096 if (annex
[0] != '\0' || !target_running () || current_traceframe
== -1)
1099 if (traceframe_read_sdata (current_traceframe
, offset
,
1100 readbuf
, len
, &nbytes
))
1105 /* Helper for handle_qxfer_threads. */
1108 handle_qxfer_threads_proper (struct buffer
*buffer
)
1110 struct inferior_list_entry
*thread
;
1112 buffer_grow_str (buffer
, "<threads>\n");
1114 for (thread
= all_threads
.head
; thread
; thread
= thread
->next
)
1116 ptid_t ptid
= thread_to_gdb_id ((struct thread_info
*)thread
);
1118 int core
= target_core_of_thread (ptid
);
1121 write_ptid (ptid_s
, ptid
);
1125 sprintf (core_s
, "%d", core
);
1126 buffer_xml_printf (buffer
, "<thread id=\"%s\" core=\"%s\"/>\n",
1131 buffer_xml_printf (buffer
, "<thread id=\"%s\"/>\n",
1136 buffer_grow_str0 (buffer
, "</threads>\n");
1139 /* Handle qXfer:threads:read. */
1142 handle_qxfer_threads (const char *annex
,
1143 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1144 ULONGEST offset
, LONGEST len
)
1146 static char *result
= 0;
1147 static unsigned int result_length
= 0;
1149 if (writebuf
!= NULL
)
1152 if (!target_running () || annex
[0] != '\0')
1157 struct buffer buffer
;
1158 /* When asked for data at offset 0, generate everything and store into
1159 'result'. Successive reads will be served off 'result'. */
1163 buffer_init (&buffer
);
1165 handle_qxfer_threads_proper (&buffer
);
1167 result
= buffer_finish (&buffer
);
1168 result_length
= strlen (result
);
1169 buffer_free (&buffer
);
1172 if (offset
>= result_length
)
1174 /* We're out of data. */
1181 if (len
> result_length
- offset
)
1182 len
= result_length
- offset
;
1184 memcpy (readbuf
, result
+ offset
, len
);
1189 /* Handle qXfer:traceframe-info:read. */
1192 handle_qxfer_traceframe_info (const char *annex
,
1193 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1194 ULONGEST offset
, LONGEST len
)
1196 static char *result
= 0;
1197 static unsigned int result_length
= 0;
1199 if (writebuf
!= NULL
)
1202 if (!target_running () || annex
[0] != '\0' || current_traceframe
== -1)
1207 struct buffer buffer
;
1209 /* When asked for data at offset 0, generate everything and
1210 store into 'result'. Successive reads will be served off
1214 buffer_init (&buffer
);
1216 traceframe_read_info (current_traceframe
, &buffer
);
1218 result
= buffer_finish (&buffer
);
1219 result_length
= strlen (result
);
1220 buffer_free (&buffer
);
1223 if (offset
>= result_length
)
1225 /* We're out of data. */
1232 if (len
> result_length
- offset
)
1233 len
= result_length
- offset
;
1235 memcpy (readbuf
, result
+ offset
, len
);
1239 /* Handle qXfer:fdpic:read. */
1242 handle_qxfer_fdpic (const char *annex
, gdb_byte
*readbuf
,
1243 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1245 if (the_target
->read_loadmap
== NULL
)
1248 if (!target_running ())
1251 return (*the_target
->read_loadmap
) (annex
, offset
, readbuf
, len
);
1254 static const struct qxfer qxfer_packets
[] =
1256 { "auxv", handle_qxfer_auxv
},
1257 { "fdpic", handle_qxfer_fdpic
},
1258 { "features", handle_qxfer_features
},
1259 { "libraries", handle_qxfer_libraries
},
1260 { "libraries-svr4", handle_qxfer_libraries_svr4
},
1261 { "osdata", handle_qxfer_osdata
},
1262 { "siginfo", handle_qxfer_siginfo
},
1263 { "spu", handle_qxfer_spu
},
1264 { "statictrace", handle_qxfer_statictrace
},
1265 { "threads", handle_qxfer_threads
},
1266 { "traceframe-info", handle_qxfer_traceframe_info
},
1270 handle_qxfer (char *own_buf
, int packet_len
, int *new_packet_len_p
)
1278 if (strncmp (own_buf
, "qXfer:", 6) != 0)
1281 /* Grab the object, r/w and annex. */
1282 if (decode_xfer (own_buf
+ 6, &object
, &rw
, &annex
, &offset
) < 0)
1284 write_enn (own_buf
);
1289 i
< sizeof (qxfer_packets
) / sizeof (qxfer_packets
[0]);
1292 const struct qxfer
*q
= &qxfer_packets
[i
];
1294 if (strcmp (object
, q
->object
) == 0)
1296 if (strcmp (rw
, "read") == 0)
1298 unsigned char *data
;
1303 /* Grab the offset and length. */
1304 if (decode_xfer_read (offset
, &ofs
, &len
) < 0)
1306 write_enn (own_buf
);
1310 /* Read one extra byte, as an indicator of whether there is
1312 if (len
> PBUFSIZ
- 2)
1314 data
= malloc (len
+ 1);
1317 write_enn (own_buf
);
1320 n
= (*q
->xfer
) (annex
, data
, NULL
, ofs
, len
+ 1);
1327 write_enn (own_buf
);
1329 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, len
, 1);
1331 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, n
, 0);
1336 else if (strcmp (rw
, "write") == 0)
1341 unsigned char *data
;
1343 strcpy (own_buf
, "E00");
1344 data
= malloc (packet_len
- (offset
- own_buf
));
1347 write_enn (own_buf
);
1350 if (decode_xfer_write (offset
, packet_len
- (offset
- own_buf
),
1351 &ofs
, &len
, data
) < 0)
1354 write_enn (own_buf
);
1358 n
= (*q
->xfer
) (annex
, NULL
, data
, ofs
, len
);
1365 write_enn (own_buf
);
1367 sprintf (own_buf
, "%x", n
);
1380 /* Table used by the crc32 function to calcuate the checksum. */
1382 static unsigned int crc32_table
[256] =
1385 /* Compute 32 bit CRC from inferior memory.
1387 On success, return 32 bit CRC.
1388 On failure, return (unsigned long long) -1. */
1390 static unsigned long long
1391 crc32 (CORE_ADDR base
, int len
, unsigned int crc
)
1393 if (!crc32_table
[1])
1395 /* Initialize the CRC table and the decoding table. */
1399 for (i
= 0; i
< 256; i
++)
1401 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
1402 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
1409 unsigned char byte
= 0;
1411 /* Return failure if memory read fails. */
1412 if (read_inferior_memory (base
, &byte
, 1) != 0)
1413 return (unsigned long long) -1;
1415 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ byte
) & 255];
1418 return (unsigned long long) crc
;
1421 /* Handle all of the extended 'q' packets. */
1424 handle_query (char *own_buf
, int packet_len
, int *new_packet_len_p
)
1426 static struct inferior_list_entry
*thread_ptr
;
1428 /* Reply the current thread id. */
1429 if (strcmp ("qC", own_buf
) == 0 && !disable_packet_qC
)
1432 require_running (own_buf
);
1434 if (!ptid_equal (general_thread
, null_ptid
)
1435 && !ptid_equal (general_thread
, minus_one_ptid
))
1436 gdb_id
= general_thread
;
1439 thread_ptr
= all_threads
.head
;
1440 gdb_id
= thread_to_gdb_id ((struct thread_info
*)thread_ptr
);
1443 sprintf (own_buf
, "QC");
1445 write_ptid (own_buf
, gdb_id
);
1449 if (strcmp ("qSymbol::", own_buf
) == 0)
1451 /* GDB is suggesting new symbols have been loaded. This may
1452 mean a new shared library has been detected as loaded, so
1453 take the opportunity to check if breakpoints we think are
1454 inserted, still are. Note that it isn't guaranteed that
1455 we'll see this when a shared library is loaded, and nor will
1456 we see this for unloads (although breakpoints in unloaded
1457 libraries shouldn't trigger), as GDB may not find symbols for
1458 the library at all. We also re-validate breakpoints when we
1459 see a second GDB breakpoint for the same address, and or when
1460 we access breakpoint shadows. */
1461 validate_breakpoints ();
1463 if (target_supports_tracepoints ())
1464 tracepoint_look_up_symbols ();
1466 if (target_running () && the_target
->look_up_symbols
!= NULL
)
1467 (*the_target
->look_up_symbols
) ();
1469 strcpy (own_buf
, "OK");
1473 if (!disable_packet_qfThreadInfo
)
1475 if (strcmp ("qfThreadInfo", own_buf
) == 0)
1479 require_running (own_buf
);
1480 thread_ptr
= all_threads
.head
;
1483 gdb_id
= thread_to_gdb_id ((struct thread_info
*)thread_ptr
);
1484 write_ptid (own_buf
, gdb_id
);
1485 thread_ptr
= thread_ptr
->next
;
1489 if (strcmp ("qsThreadInfo", own_buf
) == 0)
1493 require_running (own_buf
);
1494 if (thread_ptr
!= NULL
)
1497 gdb_id
= thread_to_gdb_id ((struct thread_info
*)thread_ptr
);
1498 write_ptid (own_buf
, gdb_id
);
1499 thread_ptr
= thread_ptr
->next
;
1504 sprintf (own_buf
, "l");
1510 if (the_target
->read_offsets
!= NULL
1511 && strcmp ("qOffsets", own_buf
) == 0)
1513 CORE_ADDR text
, data
;
1515 require_running (own_buf
);
1516 if (the_target
->read_offsets (&text
, &data
))
1517 sprintf (own_buf
, "Text=%lX;Data=%lX;Bss=%lX",
1518 (long)text
, (long)data
, (long)data
);
1520 write_enn (own_buf
);
1525 /* Protocol features query. */
1526 if (strncmp ("qSupported", own_buf
, 10) == 0
1527 && (own_buf
[10] == ':' || own_buf
[10] == '\0'))
1529 char *p
= &own_buf
[10];
1530 int gdb_supports_qRelocInsn
= 0;
1532 /* Start processing qSupported packet. */
1533 target_process_qsupported (NULL
);
1535 /* Process each feature being provided by GDB. The first
1536 feature will follow a ':', and latter features will follow
1540 char **qsupported
= NULL
;
1544 /* Two passes, to avoid nested strtok calls in
1545 target_process_qsupported. */
1546 for (p
= strtok (p
+ 1, ";");
1548 p
= strtok (NULL
, ";"))
1551 qsupported
= xrealloc (qsupported
, count
* sizeof (char *));
1552 qsupported
[count
- 1] = xstrdup (p
);
1555 for (i
= 0; i
< count
; i
++)
1558 if (strcmp (p
, "multiprocess+") == 0)
1560 /* GDB supports and wants multi-process support if
1562 if (target_supports_multi_process ())
1565 else if (strcmp (p
, "qRelocInsn+") == 0)
1567 /* GDB supports relocate instruction requests. */
1568 gdb_supports_qRelocInsn
= 1;
1571 target_process_qsupported (p
);
1580 "PacketSize=%x;QPassSignals+;QProgramSignals+",
1583 if (the_target
->qxfer_libraries_svr4
!= NULL
)
1584 strcat (own_buf
, ";qXfer:libraries-svr4:read+");
1587 /* We do not have any hook to indicate whether the non-SVR4 target
1588 backend supports qXfer:libraries:read, so always report it. */
1589 strcat (own_buf
, ";qXfer:libraries:read+");
1592 if (the_target
->read_auxv
!= NULL
)
1593 strcat (own_buf
, ";qXfer:auxv:read+");
1595 if (the_target
->qxfer_spu
!= NULL
)
1596 strcat (own_buf
, ";qXfer:spu:read+;qXfer:spu:write+");
1598 if (the_target
->qxfer_siginfo
!= NULL
)
1599 strcat (own_buf
, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
1601 if (the_target
->read_loadmap
!= NULL
)
1602 strcat (own_buf
, ";qXfer:fdpic:read+");
1604 /* We always report qXfer:features:read, as targets may
1605 install XML files on a subsequent call to arch_setup.
1606 If we reported to GDB on startup that we don't support
1607 qXfer:feature:read at all, we will never be re-queried. */
1608 strcat (own_buf
, ";qXfer:features:read+");
1610 if (transport_is_reliable
)
1611 strcat (own_buf
, ";QStartNoAckMode+");
1613 if (the_target
->qxfer_osdata
!= NULL
)
1614 strcat (own_buf
, ";qXfer:osdata:read+");
1616 if (target_supports_multi_process ())
1617 strcat (own_buf
, ";multiprocess+");
1619 if (target_supports_non_stop ())
1620 strcat (own_buf
, ";QNonStop+");
1622 if (target_supports_disable_randomization ())
1623 strcat (own_buf
, ";QDisableRandomization+");
1625 strcat (own_buf
, ";qXfer:threads:read+");
1627 if (target_supports_tracepoints ())
1629 strcat (own_buf
, ";ConditionalTracepoints+");
1630 strcat (own_buf
, ";TraceStateVariables+");
1631 strcat (own_buf
, ";TracepointSource+");
1632 strcat (own_buf
, ";DisconnectedTracing+");
1633 if (gdb_supports_qRelocInsn
&& target_supports_fast_tracepoints ())
1634 strcat (own_buf
, ";FastTracepoints+");
1635 strcat (own_buf
, ";StaticTracepoints+");
1636 strcat (own_buf
, ";InstallInTrace+");
1637 strcat (own_buf
, ";qXfer:statictrace:read+");
1638 strcat (own_buf
, ";qXfer:traceframe-info:read+");
1639 strcat (own_buf
, ";EnableDisableTracepoints+");
1640 strcat (own_buf
, ";tracenz+");
1643 /* Support target-side breakpoint conditions and commands. */
1644 strcat (own_buf
, ";ConditionalBreakpoints+");
1645 strcat (own_buf
, ";BreakpointCommands+");
1647 if (target_supports_agent ())
1648 strcat (own_buf
, ";QAgent+");
1653 /* Thread-local storage support. */
1654 if (the_target
->get_tls_address
!= NULL
1655 && strncmp ("qGetTLSAddr:", own_buf
, 12) == 0)
1657 char *p
= own_buf
+ 12;
1658 CORE_ADDR parts
[2], address
= 0;
1660 ptid_t ptid
= null_ptid
;
1662 require_running (own_buf
);
1664 for (i
= 0; i
< 3; i
++)
1672 p2
= strchr (p
, ',');
1685 ptid
= read_ptid (p
, NULL
);
1687 decode_address (&parts
[i
- 1], p
, len
);
1691 if (p
!= NULL
|| i
< 3)
1695 struct thread_info
*thread
= find_thread_ptid (ptid
);
1700 err
= the_target
->get_tls_address (thread
, parts
[0], parts
[1],
1706 strcpy (own_buf
, paddress(address
));
1711 write_enn (own_buf
);
1715 /* Otherwise, pretend we do not understand this packet. */
1718 /* Windows OS Thread Information Block address support. */
1719 if (the_target
->get_tib_address
!= NULL
1720 && strncmp ("qGetTIBAddr:", own_buf
, 12) == 0)
1725 ptid_t ptid
= read_ptid (own_buf
+ 12, &annex
);
1727 n
= (*the_target
->get_tib_address
) (ptid
, &tlb
);
1730 strcpy (own_buf
, paddress(tlb
));
1735 write_enn (own_buf
);
1741 /* Handle "monitor" commands. */
1742 if (strncmp ("qRcmd,", own_buf
, 6) == 0)
1744 char *mon
= malloc (PBUFSIZ
);
1745 int len
= strlen (own_buf
+ 6);
1749 write_enn (own_buf
);
1753 if ((len
% 2) != 0 || unhexify (mon
, own_buf
+ 6, len
/ 2) != len
/ 2)
1755 write_enn (own_buf
);
1759 mon
[len
/ 2] = '\0';
1763 if (the_target
->handle_monitor_command
== NULL
1764 || (*the_target
->handle_monitor_command
) (mon
) == 0)
1765 /* Default processing. */
1766 handle_monitor_command (mon
, own_buf
);
1772 if (strncmp ("qSearch:memory:", own_buf
,
1773 sizeof ("qSearch:memory:") - 1) == 0)
1775 require_running (own_buf
);
1776 handle_search_memory (own_buf
, packet_len
);
1780 if (strcmp (own_buf
, "qAttached") == 0
1781 || strncmp (own_buf
, "qAttached:", sizeof ("qAttached:") - 1) == 0)
1783 struct process_info
*process
;
1785 if (own_buf
[sizeof ("qAttached") - 1])
1787 int pid
= strtoul (own_buf
+ sizeof ("qAttached:") - 1, NULL
, 16);
1788 process
= (struct process_info
*)
1789 find_inferior_id (&all_processes
, pid_to_ptid (pid
));
1793 require_running (own_buf
);
1794 process
= current_process ();
1797 if (process
== NULL
)
1799 write_enn (own_buf
);
1803 strcpy (own_buf
, process
->attached
? "1" : "0");
1807 if (strncmp ("qCRC:", own_buf
, 5) == 0)
1809 /* CRC check (compare-section). */
1813 unsigned long long crc
;
1815 require_running (own_buf
);
1816 comma
= unpack_varlen_hex (own_buf
+ 5, &base
);
1817 if (*comma
++ != ',')
1819 write_enn (own_buf
);
1822 len
= strtoul (comma
, NULL
, 16);
1823 crc
= crc32 (base
, len
, 0xffffffff);
1824 /* Check for memory failure. */
1825 if (crc
== (unsigned long long) -1)
1827 write_enn (own_buf
);
1830 sprintf (own_buf
, "C%lx", (unsigned long) crc
);
1834 if (handle_qxfer (own_buf
, packet_len
, new_packet_len_p
))
1837 if (target_supports_tracepoints () && handle_tracepoint_query (own_buf
))
1840 /* Otherwise we didn't know what packet it was. Say we didn't
1845 static void gdb_wants_all_threads_stopped (void);
1847 /* Parse vCont packets. */
1849 handle_v_cont (char *own_buf
)
1853 struct thread_resume
*resume_info
;
1854 struct thread_resume default_action
= {{0}};
1856 /* Count the number of semicolons in the packet. There should be one
1857 for every action. */
1863 p
= strchr (p
, ';');
1866 resume_info
= malloc (n
* sizeof (resume_info
[0]));
1867 if (resume_info
== NULL
)
1875 if (p
[0] == 's' || p
[0] == 'S')
1876 resume_info
[i
].kind
= resume_step
;
1877 else if (p
[0] == 'c' || p
[0] == 'C')
1878 resume_info
[i
].kind
= resume_continue
;
1879 else if (p
[0] == 't')
1880 resume_info
[i
].kind
= resume_stop
;
1884 if (p
[0] == 'S' || p
[0] == 'C')
1887 sig
= strtol (p
+ 1, &q
, 16);
1892 if (!gdb_signal_to_host_p (sig
))
1894 resume_info
[i
].sig
= gdb_signal_to_host (sig
);
1898 resume_info
[i
].sig
= 0;
1904 resume_info
[i
].thread
= minus_one_ptid
;
1905 default_action
= resume_info
[i
];
1907 /* Note: we don't increment i here, we'll overwrite this entry
1908 the next time through. */
1910 else if (p
[0] == ':')
1912 ptid_t ptid
= read_ptid (p
+ 1, &q
);
1917 if (p
[0] != ';' && p
[0] != 0)
1920 resume_info
[i
].thread
= ptid
;
1927 resume_info
[i
] = default_action
;
1929 /* `cont_thread' is still used in occasional places in the backend,
1930 to implement single-thread scheduler-locking. Doesn't make sense
1931 to set it if we see a stop request, or a wildcard action (one
1932 with '-1' (all threads), or 'pPID.-1' (all threads of PID)). */
1934 && !(ptid_equal (resume_info
[0].thread
, minus_one_ptid
)
1935 || ptid_get_lwp (resume_info
[0].thread
) == -1)
1936 && resume_info
[0].kind
!= resume_stop
)
1937 cont_thread
= resume_info
[0].thread
;
1939 cont_thread
= minus_one_ptid
;
1940 set_desired_inferior (0);
1945 (*the_target
->resume
) (resume_info
, n
);
1953 last_ptid
= mywait (minus_one_ptid
, &last_status
, 0, 1);
1955 if (last_status
.kind
!= TARGET_WAITKIND_EXITED
1956 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
1957 current_inferior
->last_status
= last_status
;
1959 /* From the client's perspective, all-stop mode always stops all
1960 threads implicitly (and the target backend has already done
1961 so by now). Tag all threads as "want-stopped", so we don't
1962 resume them implicitly without the client telling us to. */
1963 gdb_wants_all_threads_stopped ();
1964 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
1965 disable_async_io ();
1967 if (last_status
.kind
== TARGET_WAITKIND_EXITED
1968 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
1969 mourn_inferior (find_process_pid (ptid_get_pid (last_ptid
)));
1974 write_enn (own_buf
);
1979 /* Attach to a new program. Return 1 if successful, 0 if failure. */
1981 handle_v_attach (char *own_buf
)
1985 pid
= strtol (own_buf
+ 8, NULL
, 16);
1986 if (pid
!= 0 && attach_inferior (pid
) == 0)
1988 /* Don't report shared library events after attaching, even if
1989 some libraries are preloaded. GDB will always poll the
1990 library list. Avoids the "stopped by shared library event"
1991 notice on the GDB side. */
1996 /* In non-stop, we don't send a resume reply. Stop events
1997 will follow up using the normal notification
2002 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2008 write_enn (own_buf
);
2013 /* Run a new program. Return 1 if successful, 0 if failure. */
2015 handle_v_run (char *own_buf
)
2017 char *p
, *next_p
, **new_argv
;
2021 for (p
= own_buf
+ strlen ("vRun;"); p
&& *p
; p
= strchr (p
, ';'))
2027 new_argv
= calloc (new_argc
+ 2, sizeof (char *));
2028 if (new_argv
== NULL
)
2030 write_enn (own_buf
);
2035 for (p
= own_buf
+ strlen ("vRun;"); *p
; p
= next_p
)
2037 next_p
= strchr (p
, ';');
2039 next_p
= p
+ strlen (p
);
2041 if (i
== 0 && p
== next_p
)
2045 /* FIXME: Fail request if out of memory instead of dying. */
2046 new_argv
[i
] = xmalloc (1 + (next_p
- p
) / 2);
2047 unhexify (new_argv
[i
], p
, (next_p
- p
) / 2);
2048 new_argv
[i
][(next_p
- p
) / 2] = '\0';
2057 if (new_argv
[0] == NULL
)
2059 /* GDB didn't specify a program to run. Use the program from the
2060 last run with the new argument list. */
2062 if (program_argv
== NULL
)
2064 write_enn (own_buf
);
2065 freeargv (new_argv
);
2069 new_argv
[0] = strdup (program_argv
[0]);
2070 if (new_argv
[0] == NULL
)
2072 write_enn (own_buf
);
2073 freeargv (new_argv
);
2078 /* Free the old argv and install the new one. */
2079 freeargv (program_argv
);
2080 program_argv
= new_argv
;
2082 start_inferior (program_argv
);
2083 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
2085 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2087 /* In non-stop, sending a resume reply doesn't set the general
2088 thread, but GDB assumes a vRun sets it (this is so GDB can
2089 query which is the main thread of the new inferior. */
2091 general_thread
= last_ptid
;
2097 write_enn (own_buf
);
2102 /* Kill process. Return 1 if successful, 0 if failure. */
2104 handle_v_kill (char *own_buf
)
2107 char *p
= &own_buf
[6];
2109 pid
= strtol (p
, NULL
, 16);
2112 if (pid
!= 0 && kill_inferior (pid
) == 0)
2114 last_status
.kind
= TARGET_WAITKIND_SIGNALLED
;
2115 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
2116 last_ptid
= pid_to_ptid (pid
);
2117 discard_queued_stop_replies (pid
);
2123 write_enn (own_buf
);
2128 /* Handle all of the extended 'v' packets. */
2130 handle_v_requests (char *own_buf
, int packet_len
, int *new_packet_len
)
2132 if (!disable_packet_vCont
)
2134 if (strncmp (own_buf
, "vCont;", 6) == 0)
2136 require_running (own_buf
);
2137 handle_v_cont (own_buf
);
2141 if (strncmp (own_buf
, "vCont?", 6) == 0)
2143 strcpy (own_buf
, "vCont;c;C;s;S;t");
2148 if (strncmp (own_buf
, "vFile:", 6) == 0
2149 && handle_vFile (own_buf
, packet_len
, new_packet_len
))
2152 if (strncmp (own_buf
, "vAttach;", 8) == 0)
2154 if ((!extended_protocol
|| !multi_process
) && target_running ())
2156 fprintf (stderr
, "Already debugging a process\n");
2157 write_enn (own_buf
);
2160 handle_v_attach (own_buf
);
2164 if (strncmp (own_buf
, "vRun;", 5) == 0)
2166 if ((!extended_protocol
|| !multi_process
) && target_running ())
2168 fprintf (stderr
, "Already debugging a process\n");
2169 write_enn (own_buf
);
2172 handle_v_run (own_buf
);
2176 if (strncmp (own_buf
, "vKill;", 6) == 0)
2178 if (!target_running ())
2180 fprintf (stderr
, "No process to kill\n");
2181 write_enn (own_buf
);
2184 handle_v_kill (own_buf
);
2188 if (handle_notif_ack (own_buf
, packet_len
))
2191 /* Otherwise we didn't know what packet it was. Say we didn't
2197 /* Resume inferior and wait for another event. In non-stop mode,
2198 don't really wait here, but return immediatelly to the event
2201 myresume (char *own_buf
, int step
, int sig
)
2203 struct thread_resume resume_info
[2];
2205 int valid_cont_thread
;
2207 set_desired_inferior (0);
2209 valid_cont_thread
= (!ptid_equal (cont_thread
, null_ptid
)
2210 && !ptid_equal (cont_thread
, minus_one_ptid
));
2212 if (step
|| sig
|| valid_cont_thread
)
2214 resume_info
[0].thread
= current_ptid
;
2216 resume_info
[0].kind
= resume_step
;
2218 resume_info
[0].kind
= resume_continue
;
2219 resume_info
[0].sig
= sig
;
2223 if (!valid_cont_thread
)
2225 resume_info
[n
].thread
= minus_one_ptid
;
2226 resume_info
[n
].kind
= resume_continue
;
2227 resume_info
[n
].sig
= 0;
2234 (*the_target
->resume
) (resume_info
, n
);
2240 last_ptid
= mywait (minus_one_ptid
, &last_status
, 0, 1);
2242 if (last_status
.kind
!= TARGET_WAITKIND_EXITED
2243 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
2245 current_inferior
->last_resume_kind
= resume_stop
;
2246 current_inferior
->last_status
= last_status
;
2249 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2250 disable_async_io ();
2252 if (last_status
.kind
== TARGET_WAITKIND_EXITED
2253 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2254 mourn_inferior (find_process_pid (ptid_get_pid (last_ptid
)));
2258 /* Callback for for_each_inferior. Make a new stop reply for each
2262 queue_stop_reply_callback (struct inferior_list_entry
*entry
, void *arg
)
2264 struct thread_info
*thread
= (struct thread_info
*) entry
;
2266 /* For now, assume targets that don't have this callback also don't
2267 manage the thread's last_status field. */
2268 if (the_target
->thread_stopped
== NULL
)
2270 struct vstop_notif
*new_notif
= xmalloc (sizeof (*new_notif
));
2272 new_notif
->ptid
= entry
->id
;
2273 new_notif
->status
= thread
->last_status
;
2274 /* Pass the last stop reply back to GDB, but don't notify
2276 notif_event_enque (¬if_stop
,
2277 (struct notif_event
*) new_notif
);
2281 if (thread_stopped (thread
))
2285 "Reporting thread %s as already stopped with %s\n",
2286 target_pid_to_str (entry
->id
),
2287 target_waitstatus_to_string (&thread
->last_status
));
2289 gdb_assert (thread
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
2291 /* Pass the last stop reply back to GDB, but don't notify
2293 queue_stop_reply (entry
->id
, &thread
->last_status
);
2300 /* Set this inferior threads's state as "want-stopped". We won't
2301 resume this thread until the client gives us another action for
2305 gdb_wants_thread_stopped (struct inferior_list_entry
*entry
)
2307 struct thread_info
*thread
= (struct thread_info
*) entry
;
2309 thread
->last_resume_kind
= resume_stop
;
2311 if (thread
->last_status
.kind
== TARGET_WAITKIND_IGNORE
)
2313 /* Most threads are stopped implicitly (all-stop); tag that with
2315 thread
->last_status
.kind
= TARGET_WAITKIND_STOPPED
;
2316 thread
->last_status
.value
.sig
= GDB_SIGNAL_0
;
2320 /* Set all threads' states as "want-stopped". */
2323 gdb_wants_all_threads_stopped (void)
2325 for_each_inferior (&all_threads
, gdb_wants_thread_stopped
);
2328 /* Clear the gdb_detached flag of every process. */
2331 gdb_reattached_process (struct inferior_list_entry
*entry
)
2333 struct process_info
*process
= (struct process_info
*) entry
;
2335 process
->gdb_detached
= 0;
2338 /* Status handler for the '?' packet. */
2341 handle_status (char *own_buf
)
2343 /* GDB is connected, don't forward events to the target anymore. */
2344 for_each_inferior (&all_processes
, gdb_reattached_process
);
2346 /* In non-stop mode, we must send a stop reply for each stopped
2347 thread. In all-stop mode, just send one for the first stopped
2352 discard_queued_stop_replies (-1);
2353 find_inferior (&all_threads
, queue_stop_reply_callback
, NULL
);
2355 /* The first is sent immediatly. OK is sent if there is no
2356 stopped thread, which is the same handling of the vStopped
2357 packet (by design). */
2358 notif_write_event (¬if_stop
, own_buf
);
2363 stabilize_threads ();
2364 gdb_wants_all_threads_stopped ();
2366 if (all_threads
.head
)
2368 struct target_waitstatus status
;
2370 status
.kind
= TARGET_WAITKIND_STOPPED
;
2371 status
.value
.sig
= GDB_SIGNAL_TRAP
;
2372 prepare_resume_reply (own_buf
,
2373 all_threads
.head
->id
, &status
);
2376 strcpy (own_buf
, "W00");
2381 gdbserver_version (void)
2383 printf ("GNU gdbserver %s%s\n"
2384 "Copyright (C) 2013 Free Software Foundation, Inc.\n"
2385 "gdbserver is free software, covered by the "
2386 "GNU General Public License.\n"
2387 "This gdbserver was configured as \"%s\"\n",
2388 PKGVERSION
, version
, host_name
);
2392 gdbserver_usage (FILE *stream
)
2394 fprintf (stream
, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
2395 "\tgdbserver [OPTIONS] --attach COMM PID\n"
2396 "\tgdbserver [OPTIONS] --multi COMM\n"
2398 "COMM may either be a tty device (for serial debugging), or \n"
2399 "HOST:PORT to listen for a TCP connection.\n"
2402 " --debug Enable general debugging output.\n"
2403 " --remote-debug Enable remote protocol debugging output.\n"
2404 " --version Display version information and exit.\n"
2405 " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n"
2406 " --once Exit after the first connection has "
2408 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
2409 fprintf (stream
, "Report bugs to \"%s\".\n", REPORT_BUGS_TO
);
2413 gdbserver_show_disableable (FILE *stream
)
2415 fprintf (stream
, "Disableable packets:\n"
2416 " vCont \tAll vCont packets\n"
2417 " qC \tQuerying the current thread\n"
2418 " qfThreadInfo\tThread listing\n"
2419 " Tthread \tPassing the thread specifier in the "
2420 "T stop reply packet\n"
2421 " threads \tAll of the above\n");
2425 #undef require_running
2426 #define require_running(BUF) \
2427 if (!target_running ()) \
2434 first_thread_of (struct inferior_list_entry
*entry
, void *args
)
2436 int pid
= * (int *) args
;
2438 if (ptid_get_pid (entry
->id
) == pid
)
2445 kill_inferior_callback (struct inferior_list_entry
*entry
)
2447 struct process_info
*process
= (struct process_info
*) entry
;
2448 int pid
= ptid_get_pid (process
->head
.id
);
2450 kill_inferior (pid
);
2451 discard_queued_stop_replies (pid
);
2454 /* Callback for for_each_inferior to detach or kill the inferior,
2455 depending on whether we attached to it or not.
2456 We inform the user whether we're detaching or killing the process
2457 as this is only called when gdbserver is about to exit. */
2460 detach_or_kill_inferior_callback (struct inferior_list_entry
*entry
)
2462 struct process_info
*process
= (struct process_info
*) entry
;
2463 int pid
= ptid_get_pid (process
->head
.id
);
2465 if (process
->attached
)
2466 detach_inferior (pid
);
2468 kill_inferior (pid
);
2470 discard_queued_stop_replies (pid
);
2473 /* for_each_inferior callback for detach_or_kill_for_exit to print
2474 the pids of started inferiors. */
2477 print_started_pid (struct inferior_list_entry
*entry
)
2479 struct process_info
*process
= (struct process_info
*) entry
;
2481 if (! process
->attached
)
2483 int pid
= ptid_get_pid (process
->head
.id
);
2484 fprintf (stderr
, " %d", pid
);
2488 /* for_each_inferior callback for detach_or_kill_for_exit to print
2489 the pids of attached inferiors. */
2492 print_attached_pid (struct inferior_list_entry
*entry
)
2494 struct process_info
*process
= (struct process_info
*) entry
;
2496 if (process
->attached
)
2498 int pid
= ptid_get_pid (process
->head
.id
);
2499 fprintf (stderr
, " %d", pid
);
2503 /* Call this when exiting gdbserver with possible inferiors that need
2504 to be killed or detached from. */
2507 detach_or_kill_for_exit (void)
2509 /* First print a list of the inferiors we will be killing/detaching.
2510 This is to assist the user, for example, in case the inferior unexpectedly
2511 dies after we exit: did we screw up or did the inferior exit on its own?
2512 Having this info will save some head-scratching. */
2514 if (have_started_inferiors_p ())
2516 fprintf (stderr
, "Killing process(es):");
2517 for_each_inferior (&all_processes
, print_started_pid
);
2518 fprintf (stderr
, "\n");
2520 if (have_attached_inferiors_p ())
2522 fprintf (stderr
, "Detaching process(es):");
2523 for_each_inferior (&all_processes
, print_attached_pid
);
2524 fprintf (stderr
, "\n");
2527 /* Now we can kill or detach the inferiors. */
2529 for_each_inferior (&all_processes
, detach_or_kill_inferior_callback
);
2533 main (int argc
, char *argv
[])
2537 char *arg_end
, *port
;
2538 char **next_arg
= &argv
[1];
2539 volatile int multi_mode
= 0;
2540 volatile int attach
= 0;
2543 while (*next_arg
!= NULL
&& **next_arg
== '-')
2545 if (strcmp (*next_arg
, "--version") == 0)
2547 gdbserver_version ();
2550 else if (strcmp (*next_arg
, "--help") == 0)
2552 gdbserver_usage (stdout
);
2555 else if (strcmp (*next_arg
, "--attach") == 0)
2557 else if (strcmp (*next_arg
, "--multi") == 0)
2559 else if (strcmp (*next_arg
, "--wrapper") == 0)
2563 wrapper_argv
= next_arg
;
2564 while (*next_arg
!= NULL
&& strcmp (*next_arg
, "--") != 0)
2567 if (next_arg
== wrapper_argv
|| *next_arg
== NULL
)
2569 gdbserver_usage (stderr
);
2573 /* Consume the "--". */
2576 else if (strcmp (*next_arg
, "--debug") == 0)
2578 else if (strcmp (*next_arg
, "--remote-debug") == 0)
2580 else if (strcmp (*next_arg
, "--disable-packet") == 0)
2582 gdbserver_show_disableable (stdout
);
2585 else if (strncmp (*next_arg
,
2586 "--disable-packet=",
2587 sizeof ("--disable-packet=") - 1) == 0)
2589 char *packets
, *tok
;
2591 packets
= *next_arg
+= sizeof ("--disable-packet=") - 1;
2592 for (tok
= strtok (packets
, ",");
2594 tok
= strtok (NULL
, ","))
2596 if (strcmp ("vCont", tok
) == 0)
2597 disable_packet_vCont
= 1;
2598 else if (strcmp ("Tthread", tok
) == 0)
2599 disable_packet_Tthread
= 1;
2600 else if (strcmp ("qC", tok
) == 0)
2601 disable_packet_qC
= 1;
2602 else if (strcmp ("qfThreadInfo", tok
) == 0)
2603 disable_packet_qfThreadInfo
= 1;
2604 else if (strcmp ("threads", tok
) == 0)
2606 disable_packet_vCont
= 1;
2607 disable_packet_Tthread
= 1;
2608 disable_packet_qC
= 1;
2609 disable_packet_qfThreadInfo
= 1;
2613 fprintf (stderr
, "Don't know how to disable \"%s\".\n\n",
2615 gdbserver_show_disableable (stderr
);
2620 else if (strcmp (*next_arg
, "-") == 0)
2622 /* "-" specifies a stdio connection and is a form of port
2624 *next_arg
= STDIO_CONNECTION_NAME
;
2627 else if (strcmp (*next_arg
, "--disable-randomization") == 0)
2628 disable_randomization
= 1;
2629 else if (strcmp (*next_arg
, "--no-disable-randomization") == 0)
2630 disable_randomization
= 0;
2631 else if (strcmp (*next_arg
, "--once") == 0)
2635 fprintf (stderr
, "Unknown argument: %s\n", *next_arg
);
2643 if (setjmp (toplevel
))
2645 fprintf (stderr
, "Exiting\n");
2651 if (port
== NULL
|| (!attach
&& !multi_mode
&& *next_arg
== NULL
))
2653 gdbserver_usage (stderr
);
2657 /* We need to know whether the remote connection is stdio before
2658 starting the inferior. Inferiors created in this scenario have
2659 stdin,stdout redirected. So do this here before we call
2661 remote_prepare (port
);
2666 /* --attach used to come after PORT, so allow it there for
2668 if (*next_arg
!= NULL
&& strcmp (*next_arg
, "--attach") == 0)
2675 && (*next_arg
== NULL
2676 || (*next_arg
)[0] == '\0'
2677 || (pid
= strtoul (*next_arg
, &arg_end
, 0)) == 0
2679 || next_arg
[1] != NULL
))
2684 gdbserver_usage (stderr
);
2688 initialize_async_io ();
2690 initialize_event_loop ();
2691 if (target_supports_tracepoints ())
2692 initialize_tracepoint ();
2694 own_buf
= xmalloc (PBUFSIZ
+ 1);
2695 mem_buf
= xmalloc (PBUFSIZ
);
2697 if (pid
== 0 && *next_arg
!= NULL
)
2701 n
= argc
- (next_arg
- argv
);
2702 program_argv
= xmalloc (sizeof (char *) * (n
+ 1));
2703 for (i
= 0; i
< n
; i
++)
2704 program_argv
[i
] = xstrdup (next_arg
[i
]);
2705 program_argv
[i
] = NULL
;
2707 /* Wait till we are at first instruction in program. */
2708 start_inferior (program_argv
);
2710 /* We are now (hopefully) stopped at the first instruction of
2711 the target process. This assumes that the target process was
2712 successfully created. */
2716 if (attach_inferior (pid
) == -1)
2717 error ("Attaching not supported on this target");
2719 /* Otherwise succeeded. */
2723 last_status
.kind
= TARGET_WAITKIND_EXITED
;
2724 last_status
.value
.integer
= 0;
2725 last_ptid
= minus_one_ptid
;
2728 initialize_notif ();
2730 /* Don't report shared library events on the initial connection,
2731 even if some libraries are preloaded. Avoids the "stopped by
2732 shared library event" notice on gdb side. */
2735 if (setjmp (toplevel
))
2737 /* If something fails and longjmps while detaching or killing
2738 inferiors, we'd end up here again, stuck in an infinite loop
2739 trap. Be sure that if that happens, we exit immediately
2741 if (setjmp (toplevel
) == 0)
2742 detach_or_kill_for_exit ();
2744 fprintf (stderr
, "Detach or kill failed. Exiting\n");
2748 if (last_status
.kind
== TARGET_WAITKIND_EXITED
2749 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2754 if (!was_running
&& !multi_mode
)
2756 fprintf (stderr
, "No program to debug. GDBserver exiting.\n");
2764 /* Be sure we're out of tfind mode. */
2765 current_traceframe
= -1;
2769 if (setjmp (toplevel
) != 0)
2771 /* An error occurred. */
2772 if (response_needed
)
2774 write_enn (own_buf
);
2779 /* Wait for events. This will return when all event sources are
2780 removed from the event loop. */
2781 start_event_loop ();
2783 /* If an exit was requested (using the "monitor exit" command),
2784 terminate now. The only other way to get here is for
2785 getpkt to fail; close the connection and reopen it at the
2788 if (exit_requested
|| run_once
)
2790 /* If something fails and longjmps while detaching or
2791 killing inferiors, we'd end up here again, stuck in an
2792 infinite loop trap. Be sure that if that happens, we
2793 exit immediately instead. */
2794 if (setjmp (toplevel
) == 0)
2796 detach_or_kill_for_exit ();
2801 fprintf (stderr
, "Detach or kill failed. Exiting\n");
2807 "Remote side has terminated connection. "
2808 "GDBserver will reopen the connection.\n");
2812 if (disconnected_tracing
)
2814 /* Try to enable non-stop/async mode, so we we can both
2815 wait for an async socket accept, and handle async
2816 target events simultaneously. There's also no point
2817 either in having the target always stop all threads,
2818 when we're going to pass signals down without
2822 if (start_non_stop (1))
2825 /* Detaching implicitly resumes all threads; simply
2826 disconnecting does not. */
2832 "Disconnected tracing disabled; stopping trace run.\n");
2839 /* Process options coming from Z packets for *point at address
2840 POINT_ADDR. PACKET is the packet buffer. *PACKET is updated
2841 to point to the first char after the last processed option. */
2844 process_point_options (CORE_ADDR point_addr
, char **packet
)
2846 char *dataptr
= *packet
;
2849 /* Check if data has the correct format. */
2850 if (*dataptr
!= ';')
2857 if (*dataptr
== ';')
2860 if (*dataptr
== 'X')
2862 /* Conditional expression. */
2864 fprintf (stderr
, "Found breakpoint condition.\n");
2865 add_breakpoint_condition (point_addr
, &dataptr
);
2867 else if (strncmp (dataptr
, "cmds:", strlen ("cmds:")) == 0)
2869 dataptr
+= strlen ("cmds:");
2871 fprintf (stderr
, "Found breakpoint commands %s.\n", dataptr
);
2872 persist
= (*dataptr
== '1');
2874 add_breakpoint_commands (point_addr
, &dataptr
, persist
);
2878 fprintf (stderr
, "Unknown token %c, ignoring.\n",
2880 /* Skip tokens until we find one that we recognize. */
2881 while (*dataptr
&& *dataptr
!= ';')
2888 /* Event loop callback that handles a serial event. The first byte in
2889 the serial buffer gets us here. We expect characters to arrive at
2890 a brisk pace, so we read the rest of the packet with a blocking
2894 process_serial_event (void)
2905 int new_packet_len
= -1;
2907 /* Used to decide when gdbserver should exit in
2908 multi-mode/remote. */
2909 static int have_ran
= 0;
2912 have_ran
= target_running ();
2914 disable_async_io ();
2916 response_needed
= 0;
2917 packet_len
= getpkt (own_buf
);
2918 if (packet_len
<= 0)
2921 /* Force an event loop break. */
2924 response_needed
= 1;
2931 handle_query (own_buf
, packet_len
, &new_packet_len
);
2934 handle_general_set (own_buf
);
2937 require_running (own_buf
);
2942 pid
= strtol (&own_buf
[i
], NULL
, 16);
2945 pid
= ptid_get_pid (current_ptid
);
2947 if ((tracing
&& disconnected_tracing
) || any_persistent_commands ())
2949 struct thread_resume resume_info
;
2950 struct process_info
*process
= find_process_pid (pid
);
2952 if (process
== NULL
)
2954 write_enn (own_buf
);
2958 if (tracing
&& disconnected_tracing
)
2960 "Disconnected tracing in effect, "
2961 "leaving gdbserver attached to the process\n");
2963 if (any_persistent_commands ())
2965 "Persistent commands are present, "
2966 "leaving gdbserver attached to the process\n");
2968 /* Make sure we're in non-stop/async mode, so we we can both
2969 wait for an async socket accept, and handle async target
2970 events simultaneously. There's also no point either in
2971 having the target stop all threads, when we're going to
2972 pass signals down without informing GDB. */
2976 fprintf (stderr
, "Forcing non-stop mode\n");
2982 process
->gdb_detached
= 1;
2984 /* Detaching implicitly resumes all threads. */
2985 resume_info
.thread
= minus_one_ptid
;
2986 resume_info
.kind
= resume_continue
;
2987 resume_info
.sig
= 0;
2988 (*the_target
->resume
) (&resume_info
, 1);
2991 break; /* from switch/case */
2994 fprintf (stderr
, "Detaching from process %d\n", pid
);
2996 if (detach_inferior (pid
) != 0)
2997 write_enn (own_buf
);
3000 discard_queued_stop_replies (pid
);
3003 if (extended_protocol
)
3005 /* Treat this like a normal program exit. */
3006 last_status
.kind
= TARGET_WAITKIND_EXITED
;
3007 last_status
.value
.integer
= 0;
3008 last_ptid
= pid_to_ptid (pid
);
3010 current_inferior
= NULL
;
3017 /* If we are attached, then we can exit. Otherwise, we
3018 need to hang around doing nothing, until the child is
3020 join_inferior (pid
);
3026 extended_protocol
= 1;
3030 handle_status (own_buf
);
3033 if (own_buf
[1] == 'c' || own_buf
[1] == 'g' || own_buf
[1] == 's')
3035 ptid_t gdb_id
, thread_id
;
3038 require_running (own_buf
);
3040 gdb_id
= read_ptid (&own_buf
[2], NULL
);
3042 pid
= ptid_get_pid (gdb_id
);
3044 if (ptid_equal (gdb_id
, null_ptid
)
3045 || ptid_equal (gdb_id
, minus_one_ptid
))
3046 thread_id
= null_ptid
;
3048 && ptid_equal (pid_to_ptid (pid
),
3051 struct thread_info
*thread
=
3052 (struct thread_info
*) find_inferior (&all_threads
,
3057 write_enn (own_buf
);
3061 thread_id
= ((struct inferior_list_entry
*)thread
)->id
;
3065 thread_id
= gdb_id_to_thread_id (gdb_id
);
3066 if (ptid_equal (thread_id
, null_ptid
))
3068 write_enn (own_buf
);
3073 if (own_buf
[1] == 'g')
3075 if (ptid_equal (thread_id
, null_ptid
))
3077 /* GDB is telling us to choose any thread. Check if
3078 the currently selected thread is still valid. If
3079 it is not, select the first available. */
3080 struct thread_info
*thread
=
3081 (struct thread_info
*) find_inferior_id (&all_threads
,
3084 thread_id
= all_threads
.head
->id
;
3087 general_thread
= thread_id
;
3088 set_desired_inferior (1);
3090 else if (own_buf
[1] == 'c')
3091 cont_thread
= thread_id
;
3097 /* Silently ignore it so that gdb can extend the protocol
3098 without compatibility headaches. */
3103 require_running (own_buf
);
3104 if (current_traceframe
>= 0)
3106 struct regcache
*regcache
= new_register_cache ();
3108 if (fetch_traceframe_registers (current_traceframe
,
3110 registers_to_string (regcache
, own_buf
);
3112 write_enn (own_buf
);
3113 free_register_cache (regcache
);
3117 struct regcache
*regcache
;
3119 set_desired_inferior (1);
3120 regcache
= get_thread_regcache (current_inferior
, 1);
3121 registers_to_string (regcache
, own_buf
);
3125 require_running (own_buf
);
3126 if (current_traceframe
>= 0)
3127 write_enn (own_buf
);
3130 struct regcache
*regcache
;
3132 set_desired_inferior (1);
3133 regcache
= get_thread_regcache (current_inferior
, 1);
3134 registers_from_string (regcache
, &own_buf
[1]);
3139 require_running (own_buf
);
3140 decode_m_packet (&own_buf
[1], &mem_addr
, &len
);
3141 res
= gdb_read_memory (mem_addr
, mem_buf
, len
);
3143 write_enn (own_buf
);
3145 convert_int_to_ascii (mem_buf
, own_buf
, res
);
3148 require_running (own_buf
);
3149 decode_M_packet (&own_buf
[1], &mem_addr
, &len
, &mem_buf
);
3150 if (gdb_write_memory (mem_addr
, mem_buf
, len
) == 0)
3153 write_enn (own_buf
);
3156 require_running (own_buf
);
3157 if (decode_X_packet (&own_buf
[1], packet_len
- 1,
3158 &mem_addr
, &len
, &mem_buf
) < 0
3159 || gdb_write_memory (mem_addr
, mem_buf
, len
) != 0)
3160 write_enn (own_buf
);
3165 require_running (own_buf
);
3166 convert_ascii_to_int (own_buf
+ 1, &sig
, 1);
3167 if (gdb_signal_to_host_p (sig
))
3168 signal
= gdb_signal_to_host (sig
);
3171 myresume (own_buf
, 0, signal
);
3174 require_running (own_buf
);
3175 convert_ascii_to_int (own_buf
+ 1, &sig
, 1);
3176 if (gdb_signal_to_host_p (sig
))
3177 signal
= gdb_signal_to_host (sig
);
3180 myresume (own_buf
, 1, signal
);
3183 require_running (own_buf
);
3185 myresume (own_buf
, 0, signal
);
3188 require_running (own_buf
);
3190 myresume (own_buf
, 1, signal
);
3192 case 'Z': /* insert_ ... */
3194 case 'z': /* remove_ ... */
3199 char type
= own_buf
[1];
3201 const int insert
= ch
== 'Z';
3202 char *p
= &own_buf
[3];
3204 p
= unpack_varlen_hex (p
, &addr
);
3205 len
= strtol (p
+ 1, &dataptr
, 16);
3207 /* Default to unrecognized/unsupported. */
3211 case '0': /* software-breakpoint */
3212 case '1': /* hardware-breakpoint */
3213 case '2': /* write watchpoint */
3214 case '3': /* read watchpoint */
3215 case '4': /* access watchpoint */
3216 require_running (own_buf
);
3217 if (insert
&& the_target
->insert_point
!= NULL
)
3219 /* Insert the breakpoint. If it is already inserted, nothing
3221 res
= (*the_target
->insert_point
) (type
, addr
, len
);
3223 /* GDB may have sent us a list of *point parameters to be
3224 evaluated on the target's side. Read such list here. If we
3225 already have a list of parameters, GDB is telling us to drop
3226 that list and use this one instead. */
3227 if (!res
&& (type
== '0' || type
== '1'))
3229 /* Remove previous conditions. */
3230 clear_gdb_breakpoint_conditions (addr
);
3231 process_point_options (addr
, &dataptr
);
3234 else if (!insert
&& the_target
->remove_point
!= NULL
)
3235 res
= (*the_target
->remove_point
) (type
, addr
, len
);
3247 write_enn (own_buf
);
3251 response_needed
= 0;
3252 if (!target_running ())
3253 /* The packet we received doesn't make sense - but we can't
3254 reply to it, either. */
3257 fprintf (stderr
, "Killing all inferiors\n");
3258 for_each_inferior (&all_processes
, kill_inferior_callback
);
3260 /* When using the extended protocol, we wait with no program
3261 running. The traditional protocol will exit instead. */
3262 if (extended_protocol
)
3264 last_status
.kind
= TARGET_WAITKIND_EXITED
;
3265 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
3273 ptid_t gdb_id
, thread_id
;
3275 require_running (own_buf
);
3277 gdb_id
= read_ptid (&own_buf
[1], NULL
);
3278 thread_id
= gdb_id_to_thread_id (gdb_id
);
3279 if (ptid_equal (thread_id
, null_ptid
))
3281 write_enn (own_buf
);
3285 if (mythread_alive (thread_id
))
3288 write_enn (own_buf
);
3292 response_needed
= 0;
3294 /* Restarting the inferior is only supported in the extended
3296 if (extended_protocol
)
3298 if (target_running ())
3299 for_each_inferior (&all_processes
,
3300 kill_inferior_callback
);
3301 fprintf (stderr
, "GDBserver restarting\n");
3303 /* Wait till we are at 1st instruction in prog. */
3304 if (program_argv
!= NULL
)
3305 start_inferior (program_argv
);
3308 last_status
.kind
= TARGET_WAITKIND_EXITED
;
3309 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
3315 /* It is a request we don't understand. Respond with an
3316 empty packet so that gdb knows that we don't support this
3322 /* Extended (long) request. */
3323 handle_v_requests (own_buf
, packet_len
, &new_packet_len
);
3327 /* It is a request we don't understand. Respond with an empty
3328 packet so that gdb knows that we don't support this
3334 if (new_packet_len
!= -1)
3335 putpkt_binary (own_buf
, new_packet_len
);
3339 response_needed
= 0;
3341 if (!extended_protocol
&& have_ran
&& !target_running ())
3343 /* In non-stop, defer exiting until GDB had a chance to query
3344 the whole vStopped list (until it gets an OK). */
3345 if (QUEUE_is_empty (notif_event_p
, notif_stop
.queue
))
3347 fprintf (stderr
, "GDBserver exiting\n");
3359 /* Event-loop callback for serial events. */
3362 handle_serial_event (int err
, gdb_client_data client_data
)
3365 fprintf (stderr
, "handling possible serial event\n");
3367 /* Really handle it. */
3368 if (process_serial_event () < 0)
3371 /* Be sure to not change the selected inferior behind GDB's back.
3372 Important in the non-stop mode asynchronous protocol. */
3373 set_desired_inferior (1);
3378 /* Event-loop callback for target events. */
3381 handle_target_event (int err
, gdb_client_data client_data
)
3384 fprintf (stderr
, "handling possible target event\n");
3386 last_ptid
= mywait (minus_one_ptid
, &last_status
,
3389 if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
)
3391 int pid
= ptid_get_pid (last_ptid
);
3392 struct process_info
*process
= find_process_pid (pid
);
3393 int forward_event
= !gdb_connected () || process
->gdb_detached
;
3395 if (last_status
.kind
== TARGET_WAITKIND_EXITED
3396 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
3398 mark_breakpoints_out (process
);
3399 mourn_inferior (process
);
3403 /* We're reporting this thread as stopped. Update its
3404 "want-stopped" state to what the client wants, until it
3405 gets a new resume action. */
3406 current_inferior
->last_resume_kind
= resume_stop
;
3407 current_inferior
->last_status
= last_status
;
3412 if (!target_running ())
3414 /* The last process exited. We're done. */
3418 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
3420 /* A thread stopped with a signal, but gdb isn't
3421 connected to handle it. Pass it down to the
3422 inferior, as if it wasn't being traced. */
3423 struct thread_resume resume_info
;
3427 "GDB not connected; forwarding event %d for [%s]\n",
3428 (int) last_status
.kind
,
3429 target_pid_to_str (last_ptid
));
3431 resume_info
.thread
= last_ptid
;
3432 resume_info
.kind
= resume_continue
;
3433 resume_info
.sig
= gdb_signal_to_host (last_status
.value
.sig
);
3434 (*the_target
->resume
) (&resume_info
, 1);
3436 else if (debug_threads
)
3437 fprintf (stderr
, "GDB not connected; ignoring event %d for [%s]\n",
3438 (int) last_status
.kind
,
3439 target_pid_to_str (last_ptid
));
3443 struct vstop_notif
*vstop_notif
3444 = xmalloc (sizeof (struct vstop_notif
));
3446 vstop_notif
->status
= last_status
;
3447 vstop_notif
->ptid
= last_ptid
;
3448 /* Push Stop notification. */
3449 notif_push (¬if_stop
,
3450 (struct notif_event
*) vstop_notif
);
3454 /* Be sure to not change the selected inferior behind GDB's back.
3455 Important in the non-stop mode asynchronous protocol. */
3456 set_desired_inferior (1);