1 /* Main code for remote server for GDB.
2 Copyright (C) 1989, 1993-1995, 1997-2000, 2002-2012 Free Software
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
33 /* The thread set with an `Hc' packet. `Hc' is deprecated in favor of
34 `vCont'. Note the multi-process extensions made `vCont' a
35 requirement, so `Hc pPID.TID' is pretty much undefined. So
36 CONT_THREAD can be null_ptid for no `Hc' thread, minus_one_ptid for
37 resuming all threads of the process (again, `Hc' isn't used for
38 multi-process), or a specific thread ptid_t.
40 We also set this when handling a single-thread `vCont' resume, as
41 some places in the backends check it to know when (and for which
42 thread) single-thread scheduler-locking is in effect. */
45 /* The thread set with an `Hg' packet. */
46 ptid_t general_thread
;
50 static int extended_protocol
;
51 static int response_needed
;
52 static int exit_requested
;
54 /* --once: Exit after the first connection has closed. */
60 /* Whether we should attempt to disable the operating system's address
61 space randomization feature before starting an inferior. */
62 int disable_randomization
= 1;
64 static char **program_argv
, **wrapper_argv
;
66 /* Enable miscellaneous debugging output. The name is historical - it
67 was originally used to debug LinuxThreads support. */
70 /* Enable debugging of h/w breakpoint/watchpoint support. */
73 int pass_signals
[TARGET_SIGNAL_LAST
];
74 int program_signals
[TARGET_SIGNAL_LAST
];
75 int program_signals_p
;
79 const char *gdbserver_xmltarget
;
81 /* The PID of the originally created or attached inferior. Used to
82 send signals to the process when GDB sends us an asynchronous interrupt
83 (user hitting Control-C in the client), and to wait for the child to exit
84 when no longer debugging it. */
86 unsigned long signal_pid
;
89 /* A file descriptor for the controlling terminal. */
92 /* TERMINAL_FD's original foreground group. */
93 pid_t old_foreground_pgrp
;
95 /* Hand back terminal ownership to the original foreground group. */
98 restore_old_foreground_pgrp (void)
100 tcsetpgrp (terminal_fd
, old_foreground_pgrp
);
104 /* Set if you want to disable optional thread related packets support
105 in gdbserver, for the sake of testing GDB against stubs that don't
107 int disable_packet_vCont
;
108 int disable_packet_Tthread
;
109 int disable_packet_qC
;
110 int disable_packet_qfThreadInfo
;
112 /* Last status reported to GDB. */
113 static struct target_waitstatus last_status
;
114 static ptid_t last_ptid
;
116 static char *own_buf
;
117 static unsigned char *mem_buf
;
119 /* Structure holding information relative to a single stop reply. We
120 keep a queue of these (really a singly-linked list) to push to GDB
124 /* Pointer to next in list. */
125 struct vstop_notif
*next
;
127 /* Thread or process that got the event. */
131 struct target_waitstatus status
;
134 /* The pending stop replies list head. */
135 static struct vstop_notif
*notif_queue
= NULL
;
137 /* Put a stop reply to the stop reply queue. */
140 queue_stop_reply (ptid_t ptid
, struct target_waitstatus
*status
)
142 struct vstop_notif
*new_notif
;
144 new_notif
= xmalloc (sizeof (*new_notif
));
145 new_notif
->next
= NULL
;
146 new_notif
->ptid
= ptid
;
147 new_notif
->status
= *status
;
151 struct vstop_notif
*tail
;
152 for (tail
= notif_queue
;
156 tail
->next
= new_notif
;
159 notif_queue
= new_notif
;
164 struct vstop_notif
*n
;
166 for (n
= notif_queue
; n
; n
= n
->next
)
169 fprintf (stderr
, "pending stop replies: %d\n", i
);
173 /* Place an event in the stop reply queue, and push a notification if
174 we aren't sending one yet. */
177 push_event (ptid_t ptid
, struct target_waitstatus
*status
)
179 gdb_assert (status
->kind
!= TARGET_WAITKIND_IGNORE
);
181 queue_stop_reply (ptid
, status
);
183 /* If this is the first stop reply in the queue, then inform GDB
184 about it, by sending a Stop notification. */
185 if (notif_queue
->next
== NULL
)
190 prepare_resume_reply (p
,
191 notif_queue
->ptid
, ¬if_queue
->status
);
192 putpkt_notif (own_buf
);
196 /* Get rid of the currently pending stop replies for PID. If PID is
197 -1, then apply to all processes. */
200 discard_queued_stop_replies (int pid
)
202 struct vstop_notif
*prev
= NULL
, *reply
, *next
;
204 for (reply
= notif_queue
; reply
; reply
= next
)
209 || ptid_get_pid (reply
->ptid
) == pid
)
211 if (reply
== notif_queue
)
214 prev
->next
= reply
->next
;
223 /* If there are more stop replies to push, push one now. */
226 send_next_stop_reply (char *own_buf
)
229 prepare_resume_reply (own_buf
,
231 ¬if_queue
->status
);
237 target_running (void)
239 return all_threads
.head
!= NULL
;
243 start_inferior (char **argv
)
245 char **new_argv
= argv
;
247 if (wrapper_argv
!= NULL
)
251 for (i
= 0; wrapper_argv
[i
] != NULL
; i
++)
253 for (i
= 0; argv
[i
] != NULL
; i
++)
255 new_argv
= alloca (sizeof (char *) * count
);
257 for (i
= 0; wrapper_argv
[i
] != NULL
; i
++)
258 new_argv
[count
++] = wrapper_argv
[i
];
259 for (i
= 0; argv
[i
] != NULL
; i
++)
260 new_argv
[count
++] = argv
[i
];
261 new_argv
[count
] = NULL
;
267 for (i
= 0; new_argv
[i
]; ++i
)
268 fprintf (stderr
, "new_argv[%d] = \"%s\"\n", i
, new_argv
[i
]);
273 signal (SIGTTOU
, SIG_DFL
);
274 signal (SIGTTIN
, SIG_DFL
);
277 /* Clear this so the backend doesn't get confused, thinking
278 CONT_THREAD died, and it needs to resume all threads. */
279 cont_thread
= null_ptid
;
281 signal_pid
= create_inferior (new_argv
[0], new_argv
);
283 /* FIXME: we don't actually know at this point that the create
284 actually succeeded. We won't know that until we wait. */
285 fprintf (stderr
, "Process %s created; pid = %ld\n", argv
[0],
290 signal (SIGTTOU
, SIG_IGN
);
291 signal (SIGTTIN
, SIG_IGN
);
292 terminal_fd
= fileno (stderr
);
293 old_foreground_pgrp
= tcgetpgrp (terminal_fd
);
294 tcsetpgrp (terminal_fd
, signal_pid
);
295 atexit (restore_old_foreground_pgrp
);
298 if (wrapper_argv
!= NULL
)
300 struct thread_resume resume_info
;
302 resume_info
.thread
= pid_to_ptid (signal_pid
);
303 resume_info
.kind
= resume_continue
;
306 last_ptid
= mywait (pid_to_ptid (signal_pid
), &last_status
, 0, 0);
308 if (last_status
.kind
!= TARGET_WAITKIND_STOPPED
)
313 (*the_target
->resume
) (&resume_info
, 1);
315 last_ptid
= mywait (pid_to_ptid (signal_pid
), &last_status
, 0, 0);
316 if (last_status
.kind
!= TARGET_WAITKIND_STOPPED
)
319 current_inferior
->last_resume_kind
= resume_stop
;
320 current_inferior
->last_status
= last_status
;
322 while (last_status
.value
.sig
!= TARGET_SIGNAL_TRAP
);
324 current_inferior
->last_resume_kind
= resume_stop
;
325 current_inferior
->last_status
= last_status
;
329 /* Wait till we are at 1st instruction in program, return new pid
330 (assuming success). */
331 last_ptid
= mywait (pid_to_ptid (signal_pid
), &last_status
, 0, 0);
333 if (last_status
.kind
!= TARGET_WAITKIND_EXITED
334 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
336 current_inferior
->last_resume_kind
= resume_stop
;
337 current_inferior
->last_status
= last_status
;
344 attach_inferior (int pid
)
346 /* myattach should return -1 if attaching is unsupported,
347 0 if it succeeded, and call error() otherwise. */
349 if (myattach (pid
) != 0)
352 fprintf (stderr
, "Attached; pid = %d\n", pid
);
355 /* FIXME - It may be that we should get the SIGNAL_PID from the
356 attach function, so that it can be the main thread instead of
357 whichever we were told to attach to. */
360 /* Clear this so the backend doesn't get confused, thinking
361 CONT_THREAD died, and it needs to resume all threads. */
362 cont_thread
= null_ptid
;
366 last_ptid
= mywait (pid_to_ptid (pid
), &last_status
, 0, 0);
368 /* GDB knows to ignore the first SIGSTOP after attaching to a running
369 process using the "attach" command, but this is different; it's
370 just using "target remote". Pretend it's just starting up. */
371 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
372 && last_status
.value
.sig
== TARGET_SIGNAL_STOP
)
373 last_status
.value
.sig
= TARGET_SIGNAL_TRAP
;
375 current_inferior
->last_resume_kind
= resume_stop
;
376 current_inferior
->last_status
= last_status
;
382 extern int remote_debug
;
384 /* Decode a qXfer read request. Return 0 if everything looks OK,
388 decode_xfer_read (char *buf
, CORE_ADDR
*ofs
, unsigned int *len
)
390 /* After the read marker and annex, qXfer looks like a
391 traditional 'm' packet. */
392 decode_m_packet (buf
, ofs
, len
);
398 decode_xfer (char *buf
, char **object
, char **rw
, char **annex
, char **offset
)
400 /* Extract and NUL-terminate the object. */
402 while (*buf
&& *buf
!= ':')
408 /* Extract and NUL-terminate the read/write action. */
410 while (*buf
&& *buf
!= ':')
416 /* Extract and NUL-terminate the annex. */
418 while (*buf
&& *buf
!= ':')
428 /* Write the response to a successful qXfer read. Returns the
429 length of the (binary) data stored in BUF, corresponding
430 to as much of DATA/LEN as we could fit. IS_MORE controls
431 the first character of the response. */
433 write_qxfer_response (char *buf
, const void *data
, int len
, int is_more
)
442 return remote_escape_output (data
, len
, (unsigned char *) buf
+ 1, &out_len
,
446 /* Handle all of the extended 'Q' packets. */
449 handle_general_set (char *own_buf
)
451 if (strncmp ("QPassSignals:", own_buf
, strlen ("QPassSignals:")) == 0)
453 int numsigs
= (int) TARGET_SIGNAL_LAST
, i
;
454 const char *p
= own_buf
+ strlen ("QPassSignals:");
457 p
= decode_address_to_semicolon (&cursig
, p
);
458 for (i
= 0; i
< numsigs
; i
++)
464 /* Keep looping, to clear the remaining signals. */
467 p
= decode_address_to_semicolon (&cursig
, p
);
472 strcpy (own_buf
, "OK");
476 if (strncmp ("QProgramSignals:", own_buf
, strlen ("QProgramSignals:")) == 0)
478 int numsigs
= (int) TARGET_SIGNAL_LAST
, i
;
479 const char *p
= own_buf
+ strlen ("QProgramSignals:");
482 program_signals_p
= 1;
484 p
= decode_address_to_semicolon (&cursig
, p
);
485 for (i
= 0; i
< numsigs
; i
++)
489 program_signals
[i
] = 1;
491 /* Keep looping, to clear the remaining signals. */
494 p
= decode_address_to_semicolon (&cursig
, p
);
497 program_signals
[i
] = 0;
499 strcpy (own_buf
, "OK");
503 if (strcmp (own_buf
, "QStartNoAckMode") == 0)
507 fprintf (stderr
, "[noack mode enabled]\n");
516 if (strncmp (own_buf
, "QNonStop:", 9) == 0)
518 char *mode
= own_buf
+ 9;
522 if (strcmp (mode
, "0") == 0)
524 else if (strcmp (mode
, "1") == 0)
528 /* We don't know what this mode is, so complain to
530 fprintf (stderr
, "Unknown non-stop mode requested: %s\n",
536 req_str
= req
? "non-stop" : "all-stop";
537 if (start_non_stop (req
) != 0)
539 fprintf (stderr
, "Setting %s mode failed\n", req_str
);
547 fprintf (stderr
, "[%s mode enabled]\n", req_str
);
553 if (strncmp ("QDisableRandomization:", own_buf
,
554 strlen ("QDisableRandomization:")) == 0)
556 char *packet
= own_buf
+ strlen ("QDisableRandomization:");
559 unpack_varlen_hex (packet
, &setting
);
560 disable_randomization
= setting
;
564 if (disable_randomization
)
565 fprintf (stderr
, "[address space randomization disabled]\n");
567 fprintf (stderr
, "[address space randomization enabled]\n");
574 if (target_supports_tracepoints ()
575 && handle_tracepoint_general_set (own_buf
))
578 if (strncmp ("QAgent:", own_buf
, strlen ("QAgent:")) == 0)
580 char *mode
= own_buf
+ strlen ("QAgent:");
583 if (strcmp (mode
, "0") == 0)
585 else if (strcmp (mode
, "1") == 0)
589 /* We don't know what this value is, so complain to GDB. */
590 sprintf (own_buf
, "E.Unknown QAgent value");
594 /* Update the flag. */
597 fprintf (stderr
, "[%s agent]\n", req
? "Enable" : "Disable");
602 /* Otherwise we didn't know what packet it was. Say we didn't
608 get_features_xml (const char *annex
)
610 /* gdbserver_xmltarget defines what to return when looking
611 for the "target.xml" file. Its contents can either be
612 verbatim XML code (prefixed with a '@') or else the name
613 of the actual XML file to be used in place of "target.xml".
615 This variable is set up from the auto-generated
616 init_registers_... routine for the current target. */
618 if (gdbserver_xmltarget
619 && strcmp (annex
, "target.xml") == 0)
621 if (*gdbserver_xmltarget
== '@')
622 return gdbserver_xmltarget
+ 1;
624 annex
= gdbserver_xmltarget
;
629 extern const char *const xml_builtin
[][2];
632 /* Look for the annex. */
633 for (i
= 0; xml_builtin
[i
][0] != NULL
; i
++)
634 if (strcmp (annex
, xml_builtin
[i
][0]) == 0)
637 if (xml_builtin
[i
][0] != NULL
)
638 return xml_builtin
[i
][1];
646 monitor_show_help (void)
648 monitor_output ("The following monitor commands are supported:\n");
649 monitor_output (" set debug <0|1>\n");
650 monitor_output (" Enable general debugging messages\n");
651 monitor_output (" set debug-hw-points <0|1>\n");
652 monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
653 monitor_output (" set remote-debug <0|1>\n");
654 monitor_output (" Enable remote protocol debugging messages\n");
655 monitor_output (" exit\n");
656 monitor_output (" Quit GDBserver\n");
659 /* Read trace frame or inferior memory. Returns the number of bytes
660 actually read, zero when no further transfer is possible, and -1 on
661 error. Return of a positive value smaller than LEN does not
662 indicate there's no more to be read, only the end of the transfer.
663 E.g., when GDB reads memory from a traceframe, a first request may
664 be served from a memory block that does not cover the whole request
665 length. A following request gets the rest served from either
666 another block (of the same traceframe) or from the read-only
670 gdb_read_memory (CORE_ADDR memaddr
, unsigned char *myaddr
, int len
)
674 if (current_traceframe
>= 0)
677 ULONGEST length
= len
;
679 if (traceframe_read_mem (current_traceframe
,
680 memaddr
, myaddr
, len
, &nbytes
))
682 /* Data read from trace buffer, we're done. */
685 if (!in_readonly_region (memaddr
, length
))
687 /* Otherwise we have a valid readonly case, fall through. */
688 /* (assume no half-trace half-real blocks for now) */
691 res
= prepare_to_access_memory ();
694 res
= read_inferior_memory (memaddr
, myaddr
, len
);
695 done_accessing_memory ();
697 return res
== 0 ? len
: -1;
703 /* Write trace frame or inferior memory. Actually, writing to trace
704 frames is forbidden. */
707 gdb_write_memory (CORE_ADDR memaddr
, const unsigned char *myaddr
, int len
)
709 if (current_traceframe
>= 0)
715 ret
= prepare_to_access_memory ();
718 ret
= write_inferior_memory (memaddr
, myaddr
, len
);
719 done_accessing_memory ();
725 /* Subroutine of handle_search_memory to simplify it. */
728 handle_search_memory_1 (CORE_ADDR start_addr
, CORE_ADDR search_space_len
,
729 gdb_byte
*pattern
, unsigned pattern_len
,
730 gdb_byte
*search_buf
,
731 unsigned chunk_size
, unsigned search_buf_size
,
732 CORE_ADDR
*found_addrp
)
734 /* Prime the search buffer. */
736 if (gdb_read_memory (start_addr
, search_buf
, search_buf_size
)
739 warning ("Unable to access target memory at 0x%lx, halting search.",
744 /* Perform the search.
746 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
747 When we've scanned N bytes we copy the trailing bytes to the start and
748 read in another N bytes. */
750 while (search_space_len
>= pattern_len
)
753 unsigned nr_search_bytes
= (search_space_len
< search_buf_size
757 found_ptr
= memmem (search_buf
, nr_search_bytes
, pattern
, pattern_len
);
759 if (found_ptr
!= NULL
)
761 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
762 *found_addrp
= found_addr
;
766 /* Not found in this chunk, skip to next chunk. */
768 /* Don't let search_space_len wrap here, it's unsigned. */
769 if (search_space_len
>= chunk_size
)
770 search_space_len
-= chunk_size
;
772 search_space_len
= 0;
774 if (search_space_len
>= pattern_len
)
776 unsigned keep_len
= search_buf_size
- chunk_size
;
777 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
780 /* Copy the trailing part of the previous iteration to the front
781 of the buffer for the next iteration. */
782 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
784 nr_to_read
= (search_space_len
- keep_len
< chunk_size
785 ? search_space_len
- keep_len
788 if (gdb_read_memory (read_addr
, search_buf
+ keep_len
,
789 nr_to_read
) != search_buf_size
)
791 warning ("Unable to access target memory "
792 "at 0x%lx, halting search.",
797 start_addr
+= chunk_size
;
806 /* Handle qSearch:memory packets. */
809 handle_search_memory (char *own_buf
, int packet_len
)
811 CORE_ADDR start_addr
;
812 CORE_ADDR search_space_len
;
814 unsigned int pattern_len
;
815 /* NOTE: also defined in find.c testcase. */
816 #define SEARCH_CHUNK_SIZE 16000
817 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
818 /* Buffer to hold memory contents for searching. */
819 gdb_byte
*search_buf
;
820 unsigned search_buf_size
;
822 CORE_ADDR found_addr
;
823 int cmd_name_len
= sizeof ("qSearch:memory:") - 1;
825 pattern
= malloc (packet_len
);
828 error ("Unable to allocate memory to perform the search");
829 strcpy (own_buf
, "E00");
832 if (decode_search_memory_packet (own_buf
+ cmd_name_len
,
833 packet_len
- cmd_name_len
,
834 &start_addr
, &search_space_len
,
835 pattern
, &pattern_len
) < 0)
838 error ("Error in parsing qSearch:memory packet");
839 strcpy (own_buf
, "E00");
843 search_buf_size
= chunk_size
+ pattern_len
- 1;
845 /* No point in trying to allocate a buffer larger than the search space. */
846 if (search_space_len
< search_buf_size
)
847 search_buf_size
= search_space_len
;
849 search_buf
= malloc (search_buf_size
);
850 if (search_buf
== NULL
)
853 error ("Unable to allocate memory to perform the search");
854 strcpy (own_buf
, "E00");
858 found
= handle_search_memory_1 (start_addr
, search_space_len
,
859 pattern
, pattern_len
,
860 search_buf
, chunk_size
, search_buf_size
,
864 sprintf (own_buf
, "1,%lx", (long) found_addr
);
866 strcpy (own_buf
, "0");
868 strcpy (own_buf
, "E00");
874 #define require_running(BUF) \
875 if (!target_running ()) \
881 /* Handle monitor commands not handled by target-specific handlers. */
884 handle_monitor_command (char *mon
, char *own_buf
)
886 if (strcmp (mon
, "set debug 1") == 0)
889 monitor_output ("Debug output enabled.\n");
891 else if (strcmp (mon
, "set debug 0") == 0)
894 monitor_output ("Debug output disabled.\n");
896 else if (strcmp (mon
, "set debug-hw-points 1") == 0)
899 monitor_output ("H/W point debugging output enabled.\n");
901 else if (strcmp (mon
, "set debug-hw-points 0") == 0)
904 monitor_output ("H/W point debugging output disabled.\n");
906 else if (strcmp (mon
, "set remote-debug 1") == 0)
909 monitor_output ("Protocol debug output enabled.\n");
911 else if (strcmp (mon
, "set remote-debug 0") == 0)
914 monitor_output ("Protocol debug output disabled.\n");
916 else if (strcmp (mon
, "help") == 0)
917 monitor_show_help ();
918 else if (strcmp (mon
, "exit") == 0)
922 monitor_output ("Unknown monitor command.\n\n");
923 monitor_show_help ();
928 /* Associates a callback with each supported qXfer'able object. */
932 /* The object this handler handles. */
935 /* Request that the target transfer up to LEN 8-bit bytes of the
936 target's OBJECT. The OFFSET, for a seekable object, specifies
937 the starting point. The ANNEX can be used to provide additional
938 data-specific information to the target.
940 Return the number of bytes actually transfered, zero when no
941 further transfer is possible, -1 on error, and -2 when the
942 transfer is not supported. Return of a positive value smaller
943 than LEN does not indicate the end of the object, only the end of
946 One, and only one, of readbuf or writebuf must be non-NULL. */
947 int (*xfer
) (const char *annex
,
948 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
949 ULONGEST offset
, LONGEST len
);
952 /* Handle qXfer:auxv:read. */
955 handle_qxfer_auxv (const char *annex
,
956 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
957 ULONGEST offset
, LONGEST len
)
959 if (the_target
->read_auxv
== NULL
|| writebuf
!= NULL
)
962 if (annex
[0] != '\0' || !target_running ())
965 return (*the_target
->read_auxv
) (offset
, readbuf
, len
);
968 /* Handle qXfer:features:read. */
971 handle_qxfer_features (const char *annex
,
972 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
973 ULONGEST offset
, LONGEST len
)
975 const char *document
;
978 if (writebuf
!= NULL
)
981 if (!target_running ())
984 /* Grab the correct annex. */
985 document
= get_features_xml (annex
);
986 if (document
== NULL
)
989 total_len
= strlen (document
);
991 if (offset
> total_len
)
994 if (offset
+ len
> total_len
)
995 len
= total_len
- offset
;
997 memcpy (readbuf
, document
+ offset
, len
);
1001 /* Handle qXfer:libraries:read. */
1004 handle_qxfer_libraries (const char *annex
,
1005 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1006 ULONGEST offset
, LONGEST len
)
1008 unsigned int total_len
;
1010 struct inferior_list_entry
*dll_ptr
;
1012 if (writebuf
!= NULL
)
1015 if (annex
[0] != '\0' || !target_running ())
1018 /* Over-estimate the necessary memory. Assume that every character
1019 in the library name must be escaped. */
1021 for (dll_ptr
= all_dlls
.head
; dll_ptr
!= NULL
; dll_ptr
= dll_ptr
->next
)
1022 total_len
+= 128 + 6 * strlen (((struct dll_info
*) dll_ptr
)->name
);
1024 document
= malloc (total_len
);
1025 if (document
== NULL
)
1028 strcpy (document
, "<library-list>\n");
1029 p
= document
+ strlen (document
);
1031 for (dll_ptr
= all_dlls
.head
; dll_ptr
!= NULL
; dll_ptr
= dll_ptr
->next
)
1033 struct dll_info
*dll
= (struct dll_info
*) dll_ptr
;
1036 strcpy (p
, " <library name=\"");
1038 name
= xml_escape_text (dll
->name
);
1042 strcpy (p
, "\"><segment address=\"");
1044 sprintf (p
, "0x%lx", (long) dll
->base_addr
);
1046 strcpy (p
, "\"/></library>\n");
1050 strcpy (p
, "</library-list>\n");
1052 total_len
= strlen (document
);
1054 if (offset
> total_len
)
1060 if (offset
+ len
> total_len
)
1061 len
= total_len
- offset
;
1063 memcpy (readbuf
, document
+ offset
, len
);
1068 /* Handle qXfer:libraries-svr4:read. */
1071 handle_qxfer_libraries_svr4 (const char *annex
,
1072 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1073 ULONGEST offset
, LONGEST len
)
1075 if (writebuf
!= NULL
)
1078 if (annex
[0] != '\0' || !target_running ()
1079 || the_target
->qxfer_libraries_svr4
== NULL
)
1082 return the_target
->qxfer_libraries_svr4 (annex
, readbuf
, writebuf
, offset
, len
);
1085 /* Handle qXfer:osadata:read. */
1088 handle_qxfer_osdata (const char *annex
,
1089 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1090 ULONGEST offset
, LONGEST len
)
1092 if (the_target
->qxfer_osdata
== NULL
|| writebuf
!= NULL
)
1095 return (*the_target
->qxfer_osdata
) (annex
, readbuf
, NULL
, offset
, len
);
1098 /* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
1101 handle_qxfer_siginfo (const char *annex
,
1102 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1103 ULONGEST offset
, LONGEST len
)
1105 if (the_target
->qxfer_siginfo
== NULL
)
1108 if (annex
[0] != '\0' || !target_running ())
1111 return (*the_target
->qxfer_siginfo
) (annex
, readbuf
, writebuf
, offset
, len
);
1114 /* Handle qXfer:spu:read and qXfer:spu:write. */
1117 handle_qxfer_spu (const char *annex
,
1118 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1119 ULONGEST offset
, LONGEST len
)
1121 if (the_target
->qxfer_spu
== NULL
)
1124 if (!target_running ())
1127 return (*the_target
->qxfer_spu
) (annex
, readbuf
, writebuf
, offset
, len
);
1130 /* Handle qXfer:statictrace:read. */
1133 handle_qxfer_statictrace (const char *annex
,
1134 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1135 ULONGEST offset
, LONGEST len
)
1139 if (writebuf
!= NULL
)
1142 if (annex
[0] != '\0' || !target_running () || current_traceframe
== -1)
1145 if (traceframe_read_sdata (current_traceframe
, offset
,
1146 readbuf
, len
, &nbytes
))
1151 /* Helper for handle_qxfer_threads. */
1154 handle_qxfer_threads_proper (struct buffer
*buffer
)
1156 struct inferior_list_entry
*thread
;
1158 buffer_grow_str (buffer
, "<threads>\n");
1160 for (thread
= all_threads
.head
; thread
; thread
= thread
->next
)
1162 ptid_t ptid
= thread_to_gdb_id ((struct thread_info
*)thread
);
1164 int core
= target_core_of_thread (ptid
);
1167 write_ptid (ptid_s
, ptid
);
1171 sprintf (core_s
, "%d", core
);
1172 buffer_xml_printf (buffer
, "<thread id=\"%s\" core=\"%s\"/>\n",
1177 buffer_xml_printf (buffer
, "<thread id=\"%s\"/>\n",
1182 buffer_grow_str0 (buffer
, "</threads>\n");
1185 /* Handle qXfer:threads:read. */
1188 handle_qxfer_threads (const char *annex
,
1189 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1190 ULONGEST offset
, LONGEST len
)
1192 static char *result
= 0;
1193 static unsigned int result_length
= 0;
1195 if (writebuf
!= NULL
)
1198 if (!target_running () || annex
[0] != '\0')
1203 struct buffer buffer
;
1204 /* When asked for data at offset 0, generate everything and store into
1205 'result'. Successive reads will be served off 'result'. */
1209 buffer_init (&buffer
);
1211 handle_qxfer_threads_proper (&buffer
);
1213 result
= buffer_finish (&buffer
);
1214 result_length
= strlen (result
);
1215 buffer_free (&buffer
);
1218 if (offset
>= result_length
)
1220 /* We're out of data. */
1227 if (len
> result_length
- offset
)
1228 len
= result_length
- offset
;
1230 memcpy (readbuf
, result
+ offset
, len
);
1235 /* Handle qXfer:traceframe-info:read. */
1238 handle_qxfer_traceframe_info (const char *annex
,
1239 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1240 ULONGEST offset
, LONGEST len
)
1242 static char *result
= 0;
1243 static unsigned int result_length
= 0;
1245 if (writebuf
!= NULL
)
1248 if (!target_running () || annex
[0] != '\0' || current_traceframe
== -1)
1253 struct buffer buffer
;
1255 /* When asked for data at offset 0, generate everything and
1256 store into 'result'. Successive reads will be served off
1260 buffer_init (&buffer
);
1262 traceframe_read_info (current_traceframe
, &buffer
);
1264 result
= buffer_finish (&buffer
);
1265 result_length
= strlen (result
);
1266 buffer_free (&buffer
);
1269 if (offset
>= result_length
)
1271 /* We're out of data. */
1278 if (len
> result_length
- offset
)
1279 len
= result_length
- offset
;
1281 memcpy (readbuf
, result
+ offset
, len
);
1285 /* Handle qXfer:fdpic:read. */
1288 handle_qxfer_fdpic (const char *annex
, gdb_byte
*readbuf
,
1289 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1291 if (the_target
->read_loadmap
== NULL
)
1294 if (!target_running ())
1297 return (*the_target
->read_loadmap
) (annex
, offset
, readbuf
, len
);
1300 static const struct qxfer qxfer_packets
[] =
1302 { "auxv", handle_qxfer_auxv
},
1303 { "fdpic", handle_qxfer_fdpic
},
1304 { "features", handle_qxfer_features
},
1305 { "libraries", handle_qxfer_libraries
},
1306 { "libraries-svr4", handle_qxfer_libraries_svr4
},
1307 { "osdata", handle_qxfer_osdata
},
1308 { "siginfo", handle_qxfer_siginfo
},
1309 { "spu", handle_qxfer_spu
},
1310 { "statictrace", handle_qxfer_statictrace
},
1311 { "threads", handle_qxfer_threads
},
1312 { "traceframe-info", handle_qxfer_traceframe_info
},
1316 handle_qxfer (char *own_buf
, int packet_len
, int *new_packet_len_p
)
1324 if (strncmp (own_buf
, "qXfer:", 6) != 0)
1327 /* Grab the object, r/w and annex. */
1328 if (decode_xfer (own_buf
+ 6, &object
, &rw
, &annex
, &offset
) < 0)
1330 write_enn (own_buf
);
1335 i
< sizeof (qxfer_packets
) / sizeof (qxfer_packets
[0]);
1338 const struct qxfer
*q
= &qxfer_packets
[i
];
1340 if (strcmp (object
, q
->object
) == 0)
1342 if (strcmp (rw
, "read") == 0)
1344 unsigned char *data
;
1349 /* Grab the offset and length. */
1350 if (decode_xfer_read (offset
, &ofs
, &len
) < 0)
1352 write_enn (own_buf
);
1356 /* Read one extra byte, as an indicator of whether there is
1358 if (len
> PBUFSIZ
- 2)
1360 data
= malloc (len
+ 1);
1363 write_enn (own_buf
);
1366 n
= (*q
->xfer
) (annex
, data
, NULL
, ofs
, len
+ 1);
1373 write_enn (own_buf
);
1375 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, len
, 1);
1377 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, n
, 0);
1382 else if (strcmp (rw
, "write") == 0)
1387 unsigned char *data
;
1389 strcpy (own_buf
, "E00");
1390 data
= malloc (packet_len
- (offset
- own_buf
));
1393 write_enn (own_buf
);
1396 if (decode_xfer_write (offset
, packet_len
- (offset
- own_buf
),
1397 &ofs
, &len
, data
) < 0)
1400 write_enn (own_buf
);
1404 n
= (*q
->xfer
) (annex
, NULL
, data
, ofs
, len
);
1411 write_enn (own_buf
);
1413 sprintf (own_buf
, "%x", n
);
1426 /* Table used by the crc32 function to calcuate the checksum. */
1428 static unsigned int crc32_table
[256] =
1431 /* Compute 32 bit CRC from inferior memory.
1433 On success, return 32 bit CRC.
1434 On failure, return (unsigned long long) -1. */
1436 static unsigned long long
1437 crc32 (CORE_ADDR base
, int len
, unsigned int crc
)
1439 if (!crc32_table
[1])
1441 /* Initialize the CRC table and the decoding table. */
1445 for (i
= 0; i
< 256; i
++)
1447 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
1448 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
1455 unsigned char byte
= 0;
1457 /* Return failure if memory read fails. */
1458 if (read_inferior_memory (base
, &byte
, 1) != 0)
1459 return (unsigned long long) -1;
1461 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ byte
) & 255];
1464 return (unsigned long long) crc
;
1467 /* Handle all of the extended 'q' packets. */
1470 handle_query (char *own_buf
, int packet_len
, int *new_packet_len_p
)
1472 static struct inferior_list_entry
*thread_ptr
;
1474 /* Reply the current thread id. */
1475 if (strcmp ("qC", own_buf
) == 0 && !disable_packet_qC
)
1478 require_running (own_buf
);
1480 if (!ptid_equal (general_thread
, null_ptid
)
1481 && !ptid_equal (general_thread
, minus_one_ptid
))
1482 gdb_id
= general_thread
;
1485 thread_ptr
= all_threads
.head
;
1486 gdb_id
= thread_to_gdb_id ((struct thread_info
*)thread_ptr
);
1489 sprintf (own_buf
, "QC");
1491 write_ptid (own_buf
, gdb_id
);
1495 if (strcmp ("qSymbol::", own_buf
) == 0)
1497 /* GDB is suggesting new symbols have been loaded. This may
1498 mean a new shared library has been detected as loaded, so
1499 take the opportunity to check if breakpoints we think are
1500 inserted, still are. Note that it isn't guaranteed that
1501 we'll see this when a shared library is loaded, and nor will
1502 we see this for unloads (although breakpoints in unloaded
1503 libraries shouldn't trigger), as GDB may not find symbols for
1504 the library at all. We also re-validate breakpoints when we
1505 see a second GDB breakpoint for the same address, and or when
1506 we access breakpoint shadows. */
1507 validate_breakpoints ();
1509 if (target_supports_tracepoints ())
1510 tracepoint_look_up_symbols ();
1512 if (target_running () && the_target
->look_up_symbols
!= NULL
)
1513 (*the_target
->look_up_symbols
) ();
1515 strcpy (own_buf
, "OK");
1519 if (!disable_packet_qfThreadInfo
)
1521 if (strcmp ("qfThreadInfo", own_buf
) == 0)
1525 require_running (own_buf
);
1526 thread_ptr
= all_threads
.head
;
1529 gdb_id
= thread_to_gdb_id ((struct thread_info
*)thread_ptr
);
1530 write_ptid (own_buf
, gdb_id
);
1531 thread_ptr
= thread_ptr
->next
;
1535 if (strcmp ("qsThreadInfo", own_buf
) == 0)
1539 require_running (own_buf
);
1540 if (thread_ptr
!= NULL
)
1543 gdb_id
= thread_to_gdb_id ((struct thread_info
*)thread_ptr
);
1544 write_ptid (own_buf
, gdb_id
);
1545 thread_ptr
= thread_ptr
->next
;
1550 sprintf (own_buf
, "l");
1556 if (the_target
->read_offsets
!= NULL
1557 && strcmp ("qOffsets", own_buf
) == 0)
1559 CORE_ADDR text
, data
;
1561 require_running (own_buf
);
1562 if (the_target
->read_offsets (&text
, &data
))
1563 sprintf (own_buf
, "Text=%lX;Data=%lX;Bss=%lX",
1564 (long)text
, (long)data
, (long)data
);
1566 write_enn (own_buf
);
1571 /* Protocol features query. */
1572 if (strncmp ("qSupported", own_buf
, 10) == 0
1573 && (own_buf
[10] == ':' || own_buf
[10] == '\0'))
1575 char *p
= &own_buf
[10];
1576 int gdb_supports_qRelocInsn
= 0;
1578 /* Start processing qSupported packet. */
1579 target_process_qsupported (NULL
);
1581 /* Process each feature being provided by GDB. The first
1582 feature will follow a ':', and latter features will follow
1586 char **qsupported
= NULL
;
1590 /* Two passes, to avoid nested strtok calls in
1591 target_process_qsupported. */
1592 for (p
= strtok (p
+ 1, ";");
1594 p
= strtok (NULL
, ";"))
1597 qsupported
= xrealloc (qsupported
, count
* sizeof (char *));
1598 qsupported
[count
- 1] = xstrdup (p
);
1601 for (i
= 0; i
< count
; i
++)
1604 if (strcmp (p
, "multiprocess+") == 0)
1606 /* GDB supports and wants multi-process support if
1608 if (target_supports_multi_process ())
1611 else if (strcmp (p
, "qRelocInsn+") == 0)
1613 /* GDB supports relocate instruction requests. */
1614 gdb_supports_qRelocInsn
= 1;
1617 target_process_qsupported (p
);
1626 "PacketSize=%x;QPassSignals+;QProgramSignals+",
1629 if (the_target
->qxfer_libraries_svr4
!= NULL
)
1630 strcat (own_buf
, ";qXfer:libraries-svr4:read+");
1633 /* We do not have any hook to indicate whether the non-SVR4 target
1634 backend supports qXfer:libraries:read, so always report it. */
1635 strcat (own_buf
, ";qXfer:libraries:read+");
1638 if (the_target
->read_auxv
!= NULL
)
1639 strcat (own_buf
, ";qXfer:auxv:read+");
1641 if (the_target
->qxfer_spu
!= NULL
)
1642 strcat (own_buf
, ";qXfer:spu:read+;qXfer:spu:write+");
1644 if (the_target
->qxfer_siginfo
!= NULL
)
1645 strcat (own_buf
, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
1647 if (the_target
->read_loadmap
!= NULL
)
1648 strcat (own_buf
, ";qXfer:fdpic:read+");
1650 /* We always report qXfer:features:read, as targets may
1651 install XML files on a subsequent call to arch_setup.
1652 If we reported to GDB on startup that we don't support
1653 qXfer:feature:read at all, we will never be re-queried. */
1654 strcat (own_buf
, ";qXfer:features:read+");
1656 if (transport_is_reliable
)
1657 strcat (own_buf
, ";QStartNoAckMode+");
1659 if (the_target
->qxfer_osdata
!= NULL
)
1660 strcat (own_buf
, ";qXfer:osdata:read+");
1662 if (target_supports_multi_process ())
1663 strcat (own_buf
, ";multiprocess+");
1665 if (target_supports_non_stop ())
1666 strcat (own_buf
, ";QNonStop+");
1668 if (target_supports_disable_randomization ())
1669 strcat (own_buf
, ";QDisableRandomization+");
1671 strcat (own_buf
, ";qXfer:threads:read+");
1673 if (target_supports_tracepoints ())
1675 strcat (own_buf
, ";ConditionalTracepoints+");
1676 strcat (own_buf
, ";TraceStateVariables+");
1677 strcat (own_buf
, ";TracepointSource+");
1678 strcat (own_buf
, ";DisconnectedTracing+");
1679 if (gdb_supports_qRelocInsn
&& target_supports_fast_tracepoints ())
1680 strcat (own_buf
, ";FastTracepoints+");
1681 strcat (own_buf
, ";StaticTracepoints+");
1682 strcat (own_buf
, ";InstallInTrace+");
1683 strcat (own_buf
, ";qXfer:statictrace:read+");
1684 strcat (own_buf
, ";qXfer:traceframe-info:read+");
1685 strcat (own_buf
, ";EnableDisableTracepoints+");
1686 strcat (own_buf
, ";tracenz+");
1689 /* Support target-side breakpoint conditions. */
1690 strcat (own_buf
, ";ConditionalBreakpoints+");
1692 if (target_supports_agent ())
1693 strcat (own_buf
, ";QAgent+");
1698 /* Thread-local storage support. */
1699 if (the_target
->get_tls_address
!= NULL
1700 && strncmp ("qGetTLSAddr:", own_buf
, 12) == 0)
1702 char *p
= own_buf
+ 12;
1703 CORE_ADDR parts
[2], address
= 0;
1705 ptid_t ptid
= null_ptid
;
1707 require_running (own_buf
);
1709 for (i
= 0; i
< 3; i
++)
1717 p2
= strchr (p
, ',');
1730 ptid
= read_ptid (p
, NULL
);
1732 decode_address (&parts
[i
- 1], p
, len
);
1736 if (p
!= NULL
|| i
< 3)
1740 struct thread_info
*thread
= find_thread_ptid (ptid
);
1745 err
= the_target
->get_tls_address (thread
, parts
[0], parts
[1],
1751 strcpy (own_buf
, paddress(address
));
1756 write_enn (own_buf
);
1760 /* Otherwise, pretend we do not understand this packet. */
1763 /* Windows OS Thread Information Block address support. */
1764 if (the_target
->get_tib_address
!= NULL
1765 && strncmp ("qGetTIBAddr:", own_buf
, 12) == 0)
1770 ptid_t ptid
= read_ptid (own_buf
+ 12, &annex
);
1772 n
= (*the_target
->get_tib_address
) (ptid
, &tlb
);
1775 strcpy (own_buf
, paddress(tlb
));
1780 write_enn (own_buf
);
1786 /* Handle "monitor" commands. */
1787 if (strncmp ("qRcmd,", own_buf
, 6) == 0)
1789 char *mon
= malloc (PBUFSIZ
);
1790 int len
= strlen (own_buf
+ 6);
1794 write_enn (own_buf
);
1798 if ((len
% 2) != 0 || unhexify (mon
, own_buf
+ 6, len
/ 2) != len
/ 2)
1800 write_enn (own_buf
);
1804 mon
[len
/ 2] = '\0';
1808 if (the_target
->handle_monitor_command
== NULL
1809 || (*the_target
->handle_monitor_command
) (mon
) == 0)
1810 /* Default processing. */
1811 handle_monitor_command (mon
, own_buf
);
1817 if (strncmp ("qSearch:memory:", own_buf
,
1818 sizeof ("qSearch:memory:") - 1) == 0)
1820 require_running (own_buf
);
1821 handle_search_memory (own_buf
, packet_len
);
1825 if (strcmp (own_buf
, "qAttached") == 0
1826 || strncmp (own_buf
, "qAttached:", sizeof ("qAttached:") - 1) == 0)
1828 struct process_info
*process
;
1830 if (own_buf
[sizeof ("qAttached") - 1])
1832 int pid
= strtoul (own_buf
+ sizeof ("qAttached:") - 1, NULL
, 16);
1833 process
= (struct process_info
*)
1834 find_inferior_id (&all_processes
, pid_to_ptid (pid
));
1838 require_running (own_buf
);
1839 process
= current_process ();
1842 if (process
== NULL
)
1844 write_enn (own_buf
);
1848 strcpy (own_buf
, process
->attached
? "1" : "0");
1852 if (strncmp ("qCRC:", own_buf
, 5) == 0)
1854 /* CRC check (compare-section). */
1858 unsigned long long crc
;
1860 require_running (own_buf
);
1861 base
= strtoul (own_buf
+ 5, &comma
, 16);
1862 if (*comma
++ != ',')
1864 write_enn (own_buf
);
1867 len
= strtoul (comma
, NULL
, 16);
1868 crc
= crc32 (base
, len
, 0xffffffff);
1869 /* Check for memory failure. */
1870 if (crc
== (unsigned long long) -1)
1872 write_enn (own_buf
);
1875 sprintf (own_buf
, "C%lx", (unsigned long) crc
);
1879 if (handle_qxfer (own_buf
, packet_len
, new_packet_len_p
))
1882 if (target_supports_tracepoints () && handle_tracepoint_query (own_buf
))
1885 /* Otherwise we didn't know what packet it was. Say we didn't
1890 static void gdb_wants_all_threads_stopped (void);
1892 /* Parse vCont packets. */
1894 handle_v_cont (char *own_buf
)
1898 struct thread_resume
*resume_info
;
1899 struct thread_resume default_action
= {{0}};
1901 /* Count the number of semicolons in the packet. There should be one
1902 for every action. */
1908 p
= strchr (p
, ';');
1911 resume_info
= malloc (n
* sizeof (resume_info
[0]));
1912 if (resume_info
== NULL
)
1920 if (p
[0] == 's' || p
[0] == 'S')
1921 resume_info
[i
].kind
= resume_step
;
1922 else if (p
[0] == 'c' || p
[0] == 'C')
1923 resume_info
[i
].kind
= resume_continue
;
1924 else if (p
[0] == 't')
1925 resume_info
[i
].kind
= resume_stop
;
1929 if (p
[0] == 'S' || p
[0] == 'C')
1932 sig
= strtol (p
+ 1, &q
, 16);
1937 if (!target_signal_to_host_p (sig
))
1939 resume_info
[i
].sig
= target_signal_to_host (sig
);
1943 resume_info
[i
].sig
= 0;
1949 resume_info
[i
].thread
= minus_one_ptid
;
1950 default_action
= resume_info
[i
];
1952 /* Note: we don't increment i here, we'll overwrite this entry
1953 the next time through. */
1955 else if (p
[0] == ':')
1957 ptid_t ptid
= read_ptid (p
+ 1, &q
);
1962 if (p
[0] != ';' && p
[0] != 0)
1965 resume_info
[i
].thread
= ptid
;
1972 resume_info
[i
] = default_action
;
1974 /* `cont_thread' is still used in occasional places in the backend,
1975 to implement single-thread scheduler-locking. Doesn't make sense
1976 to set it if we see a stop request, or any form of wildcard
1979 && !(ptid_equal (resume_info
[0].thread
, minus_one_ptid
)
1980 || ptid_get_lwp (resume_info
[0].thread
) == -1)
1981 && resume_info
[0].kind
!= resume_stop
)
1982 cont_thread
= resume_info
[0].thread
;
1984 cont_thread
= minus_one_ptid
;
1985 set_desired_inferior (0);
1990 (*the_target
->resume
) (resume_info
, n
);
1998 last_ptid
= mywait (minus_one_ptid
, &last_status
, 0, 1);
2000 if (last_status
.kind
!= TARGET_WAITKIND_EXITED
2001 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
2002 current_inferior
->last_status
= last_status
;
2004 /* From the client's perspective, all-stop mode always stops all
2005 threads implicitly (and the target backend has already done
2006 so by now). Tag all threads as "want-stopped", so we don't
2007 resume them implicitly without the client telling us to. */
2008 gdb_wants_all_threads_stopped ();
2009 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2010 disable_async_io ();
2012 if (last_status
.kind
== TARGET_WAITKIND_EXITED
2013 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2014 mourn_inferior (find_process_pid (ptid_get_pid (last_ptid
)));
2019 write_enn (own_buf
);
2024 /* Attach to a new program. Return 1 if successful, 0 if failure. */
2026 handle_v_attach (char *own_buf
)
2030 pid
= strtol (own_buf
+ 8, NULL
, 16);
2031 if (pid
!= 0 && attach_inferior (pid
) == 0)
2033 /* Don't report shared library events after attaching, even if
2034 some libraries are preloaded. GDB will always poll the
2035 library list. Avoids the "stopped by shared library event"
2036 notice on the GDB side. */
2041 /* In non-stop, we don't send a resume reply. Stop events
2042 will follow up using the normal notification
2047 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2053 write_enn (own_buf
);
2058 /* Run a new program. Return 1 if successful, 0 if failure. */
2060 handle_v_run (char *own_buf
)
2062 char *p
, *next_p
, **new_argv
;
2066 for (p
= own_buf
+ strlen ("vRun;"); p
&& *p
; p
= strchr (p
, ';'))
2072 new_argv
= calloc (new_argc
+ 2, sizeof (char *));
2073 if (new_argv
== NULL
)
2075 write_enn (own_buf
);
2080 for (p
= own_buf
+ strlen ("vRun;"); *p
; p
= next_p
)
2082 next_p
= strchr (p
, ';');
2084 next_p
= p
+ strlen (p
);
2086 if (i
== 0 && p
== next_p
)
2090 /* FIXME: Fail request if out of memory instead of dying. */
2091 new_argv
[i
] = xmalloc (1 + (next_p
- p
) / 2);
2092 unhexify (new_argv
[i
], p
, (next_p
- p
) / 2);
2093 new_argv
[i
][(next_p
- p
) / 2] = '\0';
2102 if (new_argv
[0] == NULL
)
2104 /* GDB didn't specify a program to run. Use the program from the
2105 last run with the new argument list. */
2107 if (program_argv
== NULL
)
2109 write_enn (own_buf
);
2110 freeargv (new_argv
);
2114 new_argv
[0] = strdup (program_argv
[0]);
2115 if (new_argv
[0] == NULL
)
2117 write_enn (own_buf
);
2118 freeargv (new_argv
);
2123 /* Free the old argv and install the new one. */
2124 freeargv (program_argv
);
2125 program_argv
= new_argv
;
2127 start_inferior (program_argv
);
2128 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
2130 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2132 /* In non-stop, sending a resume reply doesn't set the general
2133 thread, but GDB assumes a vRun sets it (this is so GDB can
2134 query which is the main thread of the new inferior. */
2136 general_thread
= last_ptid
;
2142 write_enn (own_buf
);
2147 /* Kill process. Return 1 if successful, 0 if failure. */
2149 handle_v_kill (char *own_buf
)
2152 char *p
= &own_buf
[6];
2154 pid
= strtol (p
, NULL
, 16);
2157 if (pid
!= 0 && kill_inferior (pid
) == 0)
2159 last_status
.kind
= TARGET_WAITKIND_SIGNALLED
;
2160 last_status
.value
.sig
= TARGET_SIGNAL_KILL
;
2161 last_ptid
= pid_to_ptid (pid
);
2162 discard_queued_stop_replies (pid
);
2168 write_enn (own_buf
);
2173 /* Handle a 'vStopped' packet. */
2175 handle_v_stopped (char *own_buf
)
2177 /* If we're waiting for GDB to acknowledge a pending stop reply,
2178 consider that done. */
2181 struct vstop_notif
*head
;
2184 fprintf (stderr
, "vStopped: acking %s\n",
2185 target_pid_to_str (notif_queue
->ptid
));
2188 notif_queue
= notif_queue
->next
;
2192 /* Push another stop reply, or if there are no more left, an OK. */
2193 send_next_stop_reply (own_buf
);
2196 /* Handle all of the extended 'v' packets. */
2198 handle_v_requests (char *own_buf
, int packet_len
, int *new_packet_len
)
2200 if (!disable_packet_vCont
)
2202 if (strncmp (own_buf
, "vCont;", 6) == 0)
2204 require_running (own_buf
);
2205 handle_v_cont (own_buf
);
2209 if (strncmp (own_buf
, "vCont?", 6) == 0)
2211 strcpy (own_buf
, "vCont;c;C;s;S;t");
2216 if (strncmp (own_buf
, "vFile:", 6) == 0
2217 && handle_vFile (own_buf
, packet_len
, new_packet_len
))
2220 if (strncmp (own_buf
, "vAttach;", 8) == 0)
2222 if ((!extended_protocol
|| !multi_process
) && target_running ())
2224 fprintf (stderr
, "Already debugging a process\n");
2225 write_enn (own_buf
);
2228 handle_v_attach (own_buf
);
2232 if (strncmp (own_buf
, "vRun;", 5) == 0)
2234 if ((!extended_protocol
|| !multi_process
) && target_running ())
2236 fprintf (stderr
, "Already debugging a process\n");
2237 write_enn (own_buf
);
2240 handle_v_run (own_buf
);
2244 if (strncmp (own_buf
, "vKill;", 6) == 0)
2246 if (!target_running ())
2248 fprintf (stderr
, "No process to kill\n");
2249 write_enn (own_buf
);
2252 handle_v_kill (own_buf
);
2256 if (strncmp (own_buf
, "vStopped", 8) == 0)
2258 handle_v_stopped (own_buf
);
2262 /* Otherwise we didn't know what packet it was. Say we didn't
2268 /* Resume inferior and wait for another event. In non-stop mode,
2269 don't really wait here, but return immediatelly to the event
2272 myresume (char *own_buf
, int step
, int sig
)
2274 struct thread_resume resume_info
[2];
2276 int valid_cont_thread
;
2278 set_desired_inferior (0);
2280 valid_cont_thread
= (!ptid_equal (cont_thread
, null_ptid
)
2281 && !ptid_equal (cont_thread
, minus_one_ptid
));
2283 if (step
|| sig
|| valid_cont_thread
)
2285 resume_info
[0].thread
2286 = ((struct inferior_list_entry
*) current_inferior
)->id
;
2288 resume_info
[0].kind
= resume_step
;
2290 resume_info
[0].kind
= resume_continue
;
2291 resume_info
[0].sig
= sig
;
2295 if (!valid_cont_thread
)
2297 resume_info
[n
].thread
= minus_one_ptid
;
2298 resume_info
[n
].kind
= resume_continue
;
2299 resume_info
[n
].sig
= 0;
2306 (*the_target
->resume
) (resume_info
, n
);
2312 last_ptid
= mywait (minus_one_ptid
, &last_status
, 0, 1);
2314 if (last_status
.kind
!= TARGET_WAITKIND_EXITED
2315 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
2317 current_inferior
->last_resume_kind
= resume_stop
;
2318 current_inferior
->last_status
= last_status
;
2321 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2322 disable_async_io ();
2324 if (last_status
.kind
== TARGET_WAITKIND_EXITED
2325 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2326 mourn_inferior (find_process_pid (ptid_get_pid (last_ptid
)));
2330 /* Callback for for_each_inferior. Make a new stop reply for each
2334 queue_stop_reply_callback (struct inferior_list_entry
*entry
, void *arg
)
2336 struct thread_info
*thread
= (struct thread_info
*) entry
;
2338 /* For now, assume targets that don't have this callback also don't
2339 manage the thread's last_status field. */
2340 if (the_target
->thread_stopped
== NULL
)
2342 /* Pass the last stop reply back to GDB, but don't notify
2344 queue_stop_reply (entry
->id
, &thread
->last_status
);
2348 if (thread_stopped (thread
))
2352 "Reporting thread %s as already stopped with %s\n",
2353 target_pid_to_str (entry
->id
),
2354 target_waitstatus_to_string (&thread
->last_status
));
2356 gdb_assert (thread
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
2358 /* Pass the last stop reply back to GDB, but don't notify
2360 queue_stop_reply (entry
->id
, &thread
->last_status
);
2367 /* Set this inferior threads's state as "want-stopped". We won't
2368 resume this thread until the client gives us another action for
2372 gdb_wants_thread_stopped (struct inferior_list_entry
*entry
)
2374 struct thread_info
*thread
= (struct thread_info
*) entry
;
2376 thread
->last_resume_kind
= resume_stop
;
2378 if (thread
->last_status
.kind
== TARGET_WAITKIND_IGNORE
)
2380 /* Most threads are stopped implicitly (all-stop); tag that with
2382 thread
->last_status
.kind
= TARGET_WAITKIND_STOPPED
;
2383 thread
->last_status
.value
.sig
= TARGET_SIGNAL_0
;
2387 /* Set all threads' states as "want-stopped". */
2390 gdb_wants_all_threads_stopped (void)
2392 for_each_inferior (&all_threads
, gdb_wants_thread_stopped
);
2395 /* Clear the gdb_detached flag of every process. */
2398 gdb_reattached_process (struct inferior_list_entry
*entry
)
2400 struct process_info
*process
= (struct process_info
*) entry
;
2402 process
->gdb_detached
= 0;
2405 /* Status handler for the '?' packet. */
2408 handle_status (char *own_buf
)
2410 /* GDB is connected, don't forward events to the target anymore. */
2411 for_each_inferior (&all_processes
, gdb_reattached_process
);
2413 /* In non-stop mode, we must send a stop reply for each stopped
2414 thread. In all-stop mode, just send one for the first stopped
2419 discard_queued_stop_replies (-1);
2420 find_inferior (&all_threads
, queue_stop_reply_callback
, NULL
);
2422 /* The first is sent immediatly. OK is sent if there is no
2423 stopped thread, which is the same handling of the vStopped
2424 packet (by design). */
2425 send_next_stop_reply (own_buf
);
2430 stabilize_threads ();
2431 gdb_wants_all_threads_stopped ();
2433 if (all_threads
.head
)
2435 struct target_waitstatus status
;
2437 status
.kind
= TARGET_WAITKIND_STOPPED
;
2438 status
.value
.sig
= TARGET_SIGNAL_TRAP
;
2439 prepare_resume_reply (own_buf
,
2440 all_threads
.head
->id
, &status
);
2443 strcpy (own_buf
, "W00");
2448 gdbserver_version (void)
2450 printf ("GNU gdbserver %s%s\n"
2451 "Copyright (C) 2012 Free Software Foundation, Inc.\n"
2452 "gdbserver is free software, covered by the "
2453 "GNU General Public License.\n"
2454 "This gdbserver was configured as \"%s\"\n",
2455 PKGVERSION
, version
, host_name
);
2459 gdbserver_usage (FILE *stream
)
2461 fprintf (stream
, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
2462 "\tgdbserver [OPTIONS] --attach COMM PID\n"
2463 "\tgdbserver [OPTIONS] --multi COMM\n"
2465 "COMM may either be a tty device (for serial debugging), or \n"
2466 "HOST:PORT to listen for a TCP connection.\n"
2469 " --debug Enable general debugging output.\n"
2470 " --remote-debug Enable remote protocol debugging output.\n"
2471 " --version Display version information and exit.\n"
2472 " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n"
2473 " --once Exit after the first connection has "
2475 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
2476 fprintf (stream
, "Report bugs to \"%s\".\n", REPORT_BUGS_TO
);
2480 gdbserver_show_disableable (FILE *stream
)
2482 fprintf (stream
, "Disableable packets:\n"
2483 " vCont \tAll vCont packets\n"
2484 " qC \tQuerying the current thread\n"
2485 " qfThreadInfo\tThread listing\n"
2486 " Tthread \tPassing the thread specifier in the "
2487 "T stop reply packet\n"
2488 " threads \tAll of the above\n");
2492 #undef require_running
2493 #define require_running(BUF) \
2494 if (!target_running ()) \
2501 first_thread_of (struct inferior_list_entry
*entry
, void *args
)
2503 int pid
= * (int *) args
;
2505 if (ptid_get_pid (entry
->id
) == pid
)
2512 kill_inferior_callback (struct inferior_list_entry
*entry
)
2514 struct process_info
*process
= (struct process_info
*) entry
;
2515 int pid
= ptid_get_pid (process
->head
.id
);
2517 kill_inferior (pid
);
2518 discard_queued_stop_replies (pid
);
2521 /* Callback for for_each_inferior to detach or kill the inferior,
2522 depending on whether we attached to it or not.
2523 We inform the user whether we're detaching or killing the process
2524 as this is only called when gdbserver is about to exit. */
2527 detach_or_kill_inferior_callback (struct inferior_list_entry
*entry
)
2529 struct process_info
*process
= (struct process_info
*) entry
;
2530 int pid
= ptid_get_pid (process
->head
.id
);
2532 if (process
->attached
)
2533 detach_inferior (pid
);
2535 kill_inferior (pid
);
2537 discard_queued_stop_replies (pid
);
2540 /* for_each_inferior callback for detach_or_kill_for_exit to print
2541 the pids of started inferiors. */
2544 print_started_pid (struct inferior_list_entry
*entry
)
2546 struct process_info
*process
= (struct process_info
*) entry
;
2548 if (! process
->attached
)
2550 int pid
= ptid_get_pid (process
->head
.id
);
2551 fprintf (stderr
, " %d", pid
);
2555 /* for_each_inferior callback for detach_or_kill_for_exit to print
2556 the pids of attached inferiors. */
2559 print_attached_pid (struct inferior_list_entry
*entry
)
2561 struct process_info
*process
= (struct process_info
*) entry
;
2563 if (process
->attached
)
2565 int pid
= ptid_get_pid (process
->head
.id
);
2566 fprintf (stderr
, " %d", pid
);
2570 /* Call this when exiting gdbserver with possible inferiors that need
2571 to be killed or detached from. */
2574 detach_or_kill_for_exit (void)
2576 /* First print a list of the inferiors we will be killing/detaching.
2577 This is to assist the user, for example, in case the inferior unexpectedly
2578 dies after we exit: did we screw up or did the inferior exit on its own?
2579 Having this info will save some head-scratching. */
2581 if (have_started_inferiors_p ())
2583 fprintf (stderr
, "Killing process(es):");
2584 for_each_inferior (&all_processes
, print_started_pid
);
2585 fprintf (stderr
, "\n");
2587 if (have_attached_inferiors_p ())
2589 fprintf (stderr
, "Detaching process(es):");
2590 for_each_inferior (&all_processes
, print_attached_pid
);
2591 fprintf (stderr
, "\n");
2594 /* Now we can kill or detach the inferiors. */
2596 for_each_inferior (&all_processes
, detach_or_kill_inferior_callback
);
2600 main (int argc
, char *argv
[])
2604 char *arg_end
, *port
;
2605 char **next_arg
= &argv
[1];
2610 while (*next_arg
!= NULL
&& **next_arg
== '-')
2612 if (strcmp (*next_arg
, "--version") == 0)
2614 gdbserver_version ();
2617 else if (strcmp (*next_arg
, "--help") == 0)
2619 gdbserver_usage (stdout
);
2622 else if (strcmp (*next_arg
, "--attach") == 0)
2624 else if (strcmp (*next_arg
, "--multi") == 0)
2626 else if (strcmp (*next_arg
, "--wrapper") == 0)
2630 wrapper_argv
= next_arg
;
2631 while (*next_arg
!= NULL
&& strcmp (*next_arg
, "--") != 0)
2634 if (next_arg
== wrapper_argv
|| *next_arg
== NULL
)
2636 gdbserver_usage (stderr
);
2640 /* Consume the "--". */
2643 else if (strcmp (*next_arg
, "--debug") == 0)
2645 else if (strcmp (*next_arg
, "--remote-debug") == 0)
2647 else if (strcmp (*next_arg
, "--disable-packet") == 0)
2649 gdbserver_show_disableable (stdout
);
2652 else if (strncmp (*next_arg
,
2653 "--disable-packet=",
2654 sizeof ("--disable-packet=") - 1) == 0)
2656 char *packets
, *tok
;
2658 packets
= *next_arg
+= sizeof ("--disable-packet=") - 1;
2659 for (tok
= strtok (packets
, ",");
2661 tok
= strtok (NULL
, ","))
2663 if (strcmp ("vCont", tok
) == 0)
2664 disable_packet_vCont
= 1;
2665 else if (strcmp ("Tthread", tok
) == 0)
2666 disable_packet_Tthread
= 1;
2667 else if (strcmp ("qC", tok
) == 0)
2668 disable_packet_qC
= 1;
2669 else if (strcmp ("qfThreadInfo", tok
) == 0)
2670 disable_packet_qfThreadInfo
= 1;
2671 else if (strcmp ("threads", tok
) == 0)
2673 disable_packet_vCont
= 1;
2674 disable_packet_Tthread
= 1;
2675 disable_packet_qC
= 1;
2676 disable_packet_qfThreadInfo
= 1;
2680 fprintf (stderr
, "Don't know how to disable \"%s\".\n\n",
2682 gdbserver_show_disableable (stderr
);
2687 else if (strcmp (*next_arg
, "-") == 0)
2689 /* "-" specifies a stdio connection and is a form of port
2691 *next_arg
= STDIO_CONNECTION_NAME
;
2694 else if (strcmp (*next_arg
, "--disable-randomization") == 0)
2695 disable_randomization
= 1;
2696 else if (strcmp (*next_arg
, "--no-disable-randomization") == 0)
2697 disable_randomization
= 0;
2698 else if (strcmp (*next_arg
, "--once") == 0)
2702 fprintf (stderr
, "Unknown argument: %s\n", *next_arg
);
2710 if (setjmp (toplevel
))
2712 fprintf (stderr
, "Exiting\n");
2718 if (port
== NULL
|| (!attach
&& !multi_mode
&& *next_arg
== NULL
))
2720 gdbserver_usage (stderr
);
2724 /* We need to know whether the remote connection is stdio before
2725 starting the inferior. Inferiors created in this scenario have
2726 stdin,stdout redirected. So do this here before we call
2728 remote_prepare (port
);
2733 /* --attach used to come after PORT, so allow it there for
2735 if (*next_arg
!= NULL
&& strcmp (*next_arg
, "--attach") == 0)
2742 && (*next_arg
== NULL
2743 || (*next_arg
)[0] == '\0'
2744 || (pid
= strtoul (*next_arg
, &arg_end
, 0)) == 0
2746 || next_arg
[1] != NULL
))
2751 gdbserver_usage (stderr
);
2755 initialize_async_io ();
2757 if (target_supports_tracepoints ())
2758 initialize_tracepoint ();
2760 own_buf
= xmalloc (PBUFSIZ
+ 1);
2761 mem_buf
= xmalloc (PBUFSIZ
);
2763 if (pid
== 0 && *next_arg
!= NULL
)
2767 n
= argc
- (next_arg
- argv
);
2768 program_argv
= xmalloc (sizeof (char *) * (n
+ 1));
2769 for (i
= 0; i
< n
; i
++)
2770 program_argv
[i
] = xstrdup (next_arg
[i
]);
2771 program_argv
[i
] = NULL
;
2773 /* Wait till we are at first instruction in program. */
2774 start_inferior (program_argv
);
2776 /* We are now (hopefully) stopped at the first instruction of
2777 the target process. This assumes that the target process was
2778 successfully created. */
2782 if (attach_inferior (pid
) == -1)
2783 error ("Attaching not supported on this target");
2785 /* Otherwise succeeded. */
2789 last_status
.kind
= TARGET_WAITKIND_EXITED
;
2790 last_status
.value
.integer
= 0;
2791 last_ptid
= minus_one_ptid
;
2794 /* Don't report shared library events on the initial connection,
2795 even if some libraries are preloaded. Avoids the "stopped by
2796 shared library event" notice on gdb side. */
2799 if (setjmp (toplevel
))
2801 /* If something fails and longjmps while detaching or killing
2802 inferiors, we'd end up here again, stuck in an infinite loop
2803 trap. Be sure that if that happens, we exit immediately
2805 if (setjmp (toplevel
) == 0)
2806 detach_or_kill_for_exit ();
2808 fprintf (stderr
, "Detach or kill failed. Exiting\n");
2812 if (last_status
.kind
== TARGET_WAITKIND_EXITED
2813 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2818 if (!was_running
&& !multi_mode
)
2820 fprintf (stderr
, "No program to debug. GDBserver exiting.\n");
2828 /* Be sure we're out of tfind mode. */
2829 current_traceframe
= -1;
2833 if (setjmp (toplevel
) != 0)
2835 /* An error occurred. */
2836 if (response_needed
)
2838 write_enn (own_buf
);
2843 /* Wait for events. This will return when all event sources are
2844 removed from the event loop. */
2845 start_event_loop ();
2847 /* If an exit was requested (using the "monitor exit" command),
2848 terminate now. The only other way to get here is for
2849 getpkt to fail; close the connection and reopen it at the
2852 if (exit_requested
|| run_once
)
2854 /* If something fails and longjmps while detaching or
2855 killing inferiors, we'd end up here again, stuck in an
2856 infinite loop trap. Be sure that if that happens, we
2857 exit immediately instead. */
2858 if (setjmp (toplevel
) == 0)
2860 detach_or_kill_for_exit ();
2865 fprintf (stderr
, "Detach or kill failed. Exiting\n");
2871 "Remote side has terminated connection. "
2872 "GDBserver will reopen the connection.\n");
2876 if (disconnected_tracing
)
2878 /* Try to enable non-stop/async mode, so we we can both
2879 wait for an async socket accept, and handle async
2880 target events simultaneously. There's also no point
2881 either in having the target always stop all threads,
2882 when we're going to pass signals down without
2886 if (start_non_stop (1))
2889 /* Detaching implicitly resumes all threads; simply
2890 disconnecting does not. */
2896 "Disconnected tracing disabled; stopping trace run.\n");
2903 /* Process options coming from Z packets for *point at address
2904 POINT_ADDR. PACKET is the packet buffer. *PACKET is updated
2905 to point to the first char after the last processed option. */
2908 process_point_options (CORE_ADDR point_addr
, char **packet
)
2910 char *dataptr
= *packet
;
2912 /* Check if data has the correct format. */
2913 if (*dataptr
!= ';')
2923 /* Conditional expression. */
2925 fprintf (stderr
, "Found breakpoint condition.\n");
2926 add_breakpoint_condition (point_addr
, &dataptr
);
2929 /* Unrecognized token, just skip it. */
2930 fprintf (stderr
, "Unknown token %c, ignoring.\n",
2934 /* Skip tokens until we find one that we recognize. */
2935 while (*dataptr
&& *dataptr
!= 'X' && *dataptr
!= ';')
2941 /* Event loop callback that handles a serial event. The first byte in
2942 the serial buffer gets us here. We expect characters to arrive at
2943 a brisk pace, so we read the rest of the packet with a blocking
2947 process_serial_event (void)
2958 int new_packet_len
= -1;
2960 /* Used to decide when gdbserver should exit in
2961 multi-mode/remote. */
2962 static int have_ran
= 0;
2965 have_ran
= target_running ();
2967 disable_async_io ();
2969 response_needed
= 0;
2970 packet_len
= getpkt (own_buf
);
2971 if (packet_len
<= 0)
2974 /* Force an event loop break. */
2977 response_needed
= 1;
2984 handle_query (own_buf
, packet_len
, &new_packet_len
);
2987 handle_general_set (own_buf
);
2990 require_running (own_buf
);
2995 pid
= strtol (&own_buf
[i
], NULL
, 16);
2999 ptid_get_pid (((struct inferior_list_entry
*) current_inferior
)->id
);
3001 if (tracing
&& disconnected_tracing
)
3003 struct thread_resume resume_info
;
3004 struct process_info
*process
= find_process_pid (pid
);
3006 if (process
== NULL
)
3008 write_enn (own_buf
);
3013 "Disconnected tracing in effect, "
3014 "leaving gdbserver attached to the process\n");
3016 /* Make sure we're in non-stop/async mode, so we we can both
3017 wait for an async socket accept, and handle async target
3018 events simultaneously. There's also no point either in
3019 having the target stop all threads, when we're going to
3020 pass signals down without informing GDB. */
3024 fprintf (stderr
, "Forcing non-stop mode\n");
3030 process
->gdb_detached
= 1;
3032 /* Detaching implicitly resumes all threads. */
3033 resume_info
.thread
= minus_one_ptid
;
3034 resume_info
.kind
= resume_continue
;
3035 resume_info
.sig
= 0;
3036 (*the_target
->resume
) (&resume_info
, 1);
3039 break; /* from switch/case */
3042 fprintf (stderr
, "Detaching from process %d\n", pid
);
3044 if (detach_inferior (pid
) != 0)
3045 write_enn (own_buf
);
3048 discard_queued_stop_replies (pid
);
3051 if (extended_protocol
)
3053 /* Treat this like a normal program exit. */
3054 last_status
.kind
= TARGET_WAITKIND_EXITED
;
3055 last_status
.value
.integer
= 0;
3056 last_ptid
= pid_to_ptid (pid
);
3058 current_inferior
= NULL
;
3065 /* If we are attached, then we can exit. Otherwise, we
3066 need to hang around doing nothing, until the child is
3068 join_inferior (pid
);
3074 extended_protocol
= 1;
3078 handle_status (own_buf
);
3081 if (own_buf
[1] == 'c' || own_buf
[1] == 'g' || own_buf
[1] == 's')
3083 ptid_t gdb_id
, thread_id
;
3086 require_running (own_buf
);
3088 gdb_id
= read_ptid (&own_buf
[2], NULL
);
3090 pid
= ptid_get_pid (gdb_id
);
3092 if (ptid_equal (gdb_id
, null_ptid
)
3093 || ptid_equal (gdb_id
, minus_one_ptid
))
3094 thread_id
= null_ptid
;
3096 && ptid_equal (pid_to_ptid (pid
),
3099 struct thread_info
*thread
=
3100 (struct thread_info
*) find_inferior (&all_threads
,
3105 write_enn (own_buf
);
3109 thread_id
= ((struct inferior_list_entry
*)thread
)->id
;
3113 thread_id
= gdb_id_to_thread_id (gdb_id
);
3114 if (ptid_equal (thread_id
, null_ptid
))
3116 write_enn (own_buf
);
3121 if (own_buf
[1] == 'g')
3123 if (ptid_equal (thread_id
, null_ptid
))
3125 /* GDB is telling us to choose any thread. Check if
3126 the currently selected thread is still valid. If
3127 it is not, select the first available. */
3128 struct thread_info
*thread
=
3129 (struct thread_info
*) find_inferior_id (&all_threads
,
3132 thread_id
= all_threads
.head
->id
;
3135 general_thread
= thread_id
;
3136 set_desired_inferior (1);
3138 else if (own_buf
[1] == 'c')
3139 cont_thread
= thread_id
;
3145 /* Silently ignore it so that gdb can extend the protocol
3146 without compatibility headaches. */
3151 require_running (own_buf
);
3152 if (current_traceframe
>= 0)
3154 struct regcache
*regcache
= new_register_cache ();
3156 if (fetch_traceframe_registers (current_traceframe
,
3158 registers_to_string (regcache
, own_buf
);
3160 write_enn (own_buf
);
3161 free_register_cache (regcache
);
3165 struct regcache
*regcache
;
3167 set_desired_inferior (1);
3168 regcache
= get_thread_regcache (current_inferior
, 1);
3169 registers_to_string (regcache
, own_buf
);
3173 require_running (own_buf
);
3174 if (current_traceframe
>= 0)
3175 write_enn (own_buf
);
3178 struct regcache
*regcache
;
3180 set_desired_inferior (1);
3181 regcache
= get_thread_regcache (current_inferior
, 1);
3182 registers_from_string (regcache
, &own_buf
[1]);
3187 require_running (own_buf
);
3188 decode_m_packet (&own_buf
[1], &mem_addr
, &len
);
3189 res
= gdb_read_memory (mem_addr
, mem_buf
, len
);
3191 write_enn (own_buf
);
3193 convert_int_to_ascii (mem_buf
, own_buf
, res
);
3196 require_running (own_buf
);
3197 decode_M_packet (&own_buf
[1], &mem_addr
, &len
, &mem_buf
);
3198 if (gdb_write_memory (mem_addr
, mem_buf
, len
) == 0)
3201 write_enn (own_buf
);
3204 require_running (own_buf
);
3205 if (decode_X_packet (&own_buf
[1], packet_len
- 1,
3206 &mem_addr
, &len
, &mem_buf
) < 0
3207 || gdb_write_memory (mem_addr
, mem_buf
, len
) != 0)
3208 write_enn (own_buf
);
3213 require_running (own_buf
);
3214 convert_ascii_to_int (own_buf
+ 1, &sig
, 1);
3215 if (target_signal_to_host_p (sig
))
3216 signal
= target_signal_to_host (sig
);
3219 myresume (own_buf
, 0, signal
);
3222 require_running (own_buf
);
3223 convert_ascii_to_int (own_buf
+ 1, &sig
, 1);
3224 if (target_signal_to_host_p (sig
))
3225 signal
= target_signal_to_host (sig
);
3228 myresume (own_buf
, 1, signal
);
3231 require_running (own_buf
);
3233 myresume (own_buf
, 0, signal
);
3236 require_running (own_buf
);
3238 myresume (own_buf
, 1, signal
);
3240 case 'Z': /* insert_ ... */
3242 case 'z': /* remove_ ... */
3246 CORE_ADDR addr
= strtoul (&own_buf
[3], &lenptr
, 16);
3247 int len
= strtol (lenptr
+ 1, &dataptr
, 16);
3248 char type
= own_buf
[1];
3250 const int insert
= ch
== 'Z';
3252 /* Default to unrecognized/unsupported. */
3256 case '0': /* software-breakpoint */
3257 case '1': /* hardware-breakpoint */
3258 case '2': /* write watchpoint */
3259 case '3': /* read watchpoint */
3260 case '4': /* access watchpoint */
3261 require_running (own_buf
);
3262 if (insert
&& the_target
->insert_point
!= NULL
)
3264 /* Insert the breakpoint. If it is already inserted, nothing
3266 res
= (*the_target
->insert_point
) (type
, addr
, len
);
3268 /* GDB may have sent us a list of *point parameters to be
3269 evaluated on the target's side. Read such list here. If we
3270 already have a list of parameters, GDB is telling us to drop
3271 that list and use this one instead. */
3272 if (!res
&& (type
== '0' || type
== '1'))
3274 /* Remove previous conditions. */
3275 clear_gdb_breakpoint_conditions (addr
);
3276 process_point_options (addr
, &dataptr
);
3279 else if (!insert
&& the_target
->remove_point
!= NULL
)
3280 res
= (*the_target
->remove_point
) (type
, addr
, len
);
3292 write_enn (own_buf
);
3296 response_needed
= 0;
3297 if (!target_running ())
3298 /* The packet we received doesn't make sense - but we can't
3299 reply to it, either. */
3302 fprintf (stderr
, "Killing all inferiors\n");
3303 for_each_inferior (&all_processes
, kill_inferior_callback
);
3305 /* When using the extended protocol, we wait with no program
3306 running. The traditional protocol will exit instead. */
3307 if (extended_protocol
)
3309 last_status
.kind
= TARGET_WAITKIND_EXITED
;
3310 last_status
.value
.sig
= TARGET_SIGNAL_KILL
;
3318 ptid_t gdb_id
, thread_id
;
3320 require_running (own_buf
);
3322 gdb_id
= read_ptid (&own_buf
[1], NULL
);
3323 thread_id
= gdb_id_to_thread_id (gdb_id
);
3324 if (ptid_equal (thread_id
, null_ptid
))
3326 write_enn (own_buf
);
3330 if (mythread_alive (thread_id
))
3333 write_enn (own_buf
);
3337 response_needed
= 0;
3339 /* Restarting the inferior is only supported in the extended
3341 if (extended_protocol
)
3343 if (target_running ())
3344 for_each_inferior (&all_processes
,
3345 kill_inferior_callback
);
3346 fprintf (stderr
, "GDBserver restarting\n");
3348 /* Wait till we are at 1st instruction in prog. */
3349 if (program_argv
!= NULL
)
3350 start_inferior (program_argv
);
3353 last_status
.kind
= TARGET_WAITKIND_EXITED
;
3354 last_status
.value
.sig
= TARGET_SIGNAL_KILL
;
3360 /* It is a request we don't understand. Respond with an
3361 empty packet so that gdb knows that we don't support this
3367 /* Extended (long) request. */
3368 handle_v_requests (own_buf
, packet_len
, &new_packet_len
);
3372 /* It is a request we don't understand. Respond with an empty
3373 packet so that gdb knows that we don't support this
3379 if (new_packet_len
!= -1)
3380 putpkt_binary (own_buf
, new_packet_len
);
3384 response_needed
= 0;
3386 if (!extended_protocol
&& have_ran
&& !target_running ())
3388 /* In non-stop, defer exiting until GDB had a chance to query
3389 the whole vStopped list (until it gets an OK). */
3392 fprintf (stderr
, "GDBserver exiting\n");
3404 /* Event-loop callback for serial events. */
3407 handle_serial_event (int err
, gdb_client_data client_data
)
3410 fprintf (stderr
, "handling possible serial event\n");
3412 /* Really handle it. */
3413 if (process_serial_event () < 0)
3416 /* Be sure to not change the selected inferior behind GDB's back.
3417 Important in the non-stop mode asynchronous protocol. */
3418 set_desired_inferior (1);
3423 /* Event-loop callback for target events. */
3426 handle_target_event (int err
, gdb_client_data client_data
)
3429 fprintf (stderr
, "handling possible target event\n");
3431 last_ptid
= mywait (minus_one_ptid
, &last_status
,
3434 if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
)
3436 int pid
= ptid_get_pid (last_ptid
);
3437 struct process_info
*process
= find_process_pid (pid
);
3438 int forward_event
= !gdb_connected () || process
->gdb_detached
;
3440 if (last_status
.kind
== TARGET_WAITKIND_EXITED
3441 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
3443 mark_breakpoints_out (process
);
3444 mourn_inferior (process
);
3448 /* We're reporting this thread as stopped. Update its
3449 "want-stopped" state to what the client wants, until it
3450 gets a new resume action. */
3451 current_inferior
->last_resume_kind
= resume_stop
;
3452 current_inferior
->last_status
= last_status
;
3457 if (!target_running ())
3459 /* The last process exited. We're done. */
3463 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
3465 /* A thread stopped with a signal, but gdb isn't
3466 connected to handle it. Pass it down to the
3467 inferior, as if it wasn't being traced. */
3468 struct thread_resume resume_info
;
3472 "GDB not connected; forwarding event %d for [%s]\n",
3473 (int) last_status
.kind
,
3474 target_pid_to_str (last_ptid
));
3476 resume_info
.thread
= last_ptid
;
3477 resume_info
.kind
= resume_continue
;
3478 resume_info
.sig
= target_signal_to_host (last_status
.value
.sig
);
3479 (*the_target
->resume
) (&resume_info
, 1);
3481 else if (debug_threads
)
3482 fprintf (stderr
, "GDB not connected; ignoring event %d for [%s]\n",
3483 (int) last_status
.kind
,
3484 target_pid_to_str (last_ptid
));
3488 /* Something interesting. Tell GDB about it. */
3489 push_event (last_ptid
, &last_status
);
3493 /* Be sure to not change the selected inferior behind GDB's back.
3494 Important in the non-stop mode asynchronous protocol. */
3495 set_desired_inferior (1);