1 /* Main code for remote server for GDB.
2 Copyright (C) 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
36 ptid_t general_thread
;
41 static int extended_protocol
;
42 static int response_needed
;
43 static int exit_requested
;
48 static char **program_argv
, **wrapper_argv
;
50 /* Enable miscellaneous debugging output. The name is historical - it
51 was originally used to debug LinuxThreads support. */
54 /* Enable debugging of h/w breakpoint/watchpoint support. */
57 int pass_signals
[TARGET_SIGNAL_LAST
];
61 const char *gdbserver_xmltarget
;
63 /* The PID of the originally created or attached inferior. Used to
64 send signals to the process when GDB sends us an asynchronous interrupt
65 (user hitting Control-C in the client), and to wait for the child to exit
66 when no longer debugging it. */
68 unsigned long signal_pid
;
71 /* A file descriptor for the controlling terminal. */
74 /* TERMINAL_FD's original foreground group. */
75 pid_t old_foreground_pgrp
;
77 /* Hand back terminal ownership to the original foreground group. */
80 restore_old_foreground_pgrp (void)
82 tcsetpgrp (terminal_fd
, old_foreground_pgrp
);
86 /* Set if you want to disable optional thread related packets support
87 in gdbserver, for the sake of testing GDB against stubs that don't
89 int disable_packet_vCont
;
90 int disable_packet_Tthread
;
91 int disable_packet_qC
;
92 int disable_packet_qfThreadInfo
;
94 /* Last status reported to GDB. */
95 static struct target_waitstatus last_status
;
96 static ptid_t last_ptid
;
99 static unsigned char *mem_buf
;
101 /* Structure holding information relative to a single stop reply. We
102 keep a queue of these (really a singly-linked list) to push to GDB
106 /* Pointer to next in list. */
107 struct vstop_notif
*next
;
109 /* Thread or process that got the event. */
113 struct target_waitstatus status
;
116 /* The pending stop replies list head. */
117 static struct vstop_notif
*notif_queue
= NULL
;
119 /* Put a stop reply to the stop reply queue. */
122 queue_stop_reply (ptid_t ptid
, struct target_waitstatus
*status
)
124 struct vstop_notif
*new_notif
;
126 new_notif
= malloc (sizeof (*new_notif
));
127 new_notif
->next
= NULL
;
128 new_notif
->ptid
= ptid
;
129 new_notif
->status
= *status
;
133 struct vstop_notif
*tail
;
134 for (tail
= notif_queue
;
138 tail
->next
= new_notif
;
141 notif_queue
= new_notif
;
146 struct vstop_notif
*n
;
148 for (n
= notif_queue
; n
; n
= n
->next
)
151 fprintf (stderr
, "pending stop replies: %d\n", i
);
155 /* Place an event in the stop reply queue, and push a notification if
156 we aren't sending one yet. */
159 push_event (ptid_t ptid
, struct target_waitstatus
*status
)
161 queue_stop_reply (ptid
, status
);
163 /* If this is the first stop reply in the queue, then inform GDB
164 about it, by sending a Stop notification. */
165 if (notif_queue
->next
== NULL
)
170 prepare_resume_reply (p
,
171 notif_queue
->ptid
, ¬if_queue
->status
);
172 putpkt_notif (own_buf
);
176 /* Get rid of the currently pending stop replies for PID. If PID is
177 -1, then apply to all processes. */
180 discard_queued_stop_replies (int pid
)
182 struct vstop_notif
*prev
= NULL
, *reply
, *next
;
184 for (reply
= notif_queue
; reply
; reply
= next
)
189 || ptid_get_pid (reply
->ptid
) == pid
)
191 if (reply
== notif_queue
)
194 prev
->next
= reply
->next
;
203 /* If there are more stop replies to push, push one now. */
206 send_next_stop_reply (char *own_buf
)
209 prepare_resume_reply (own_buf
,
211 ¬if_queue
->status
);
217 target_running (void)
219 return all_threads
.head
!= NULL
;
223 start_inferior (char **argv
)
225 char **new_argv
= argv
;
227 if (wrapper_argv
!= NULL
)
231 for (i
= 0; wrapper_argv
[i
] != NULL
; i
++)
233 for (i
= 0; argv
[i
] != NULL
; i
++)
235 new_argv
= alloca (sizeof (char *) * count
);
237 for (i
= 0; wrapper_argv
[i
] != NULL
; i
++)
238 new_argv
[count
++] = wrapper_argv
[i
];
239 for (i
= 0; argv
[i
] != NULL
; i
++)
240 new_argv
[count
++] = argv
[i
];
241 new_argv
[count
] = NULL
;
247 for (i
= 0; new_argv
[i
]; ++i
)
248 fprintf (stderr
, "new_argv[%d] = \"%s\"\n", i
, new_argv
[i
]);
253 signal (SIGTTOU
, SIG_DFL
);
254 signal (SIGTTIN
, SIG_DFL
);
257 signal_pid
= create_inferior (new_argv
[0], new_argv
);
259 /* FIXME: we don't actually know at this point that the create
260 actually succeeded. We won't know that until we wait. */
261 fprintf (stderr
, "Process %s created; pid = %ld\n", argv
[0],
266 signal (SIGTTOU
, SIG_IGN
);
267 signal (SIGTTIN
, SIG_IGN
);
268 terminal_fd
= fileno (stderr
);
269 old_foreground_pgrp
= tcgetpgrp (terminal_fd
);
270 tcsetpgrp (terminal_fd
, signal_pid
);
271 atexit (restore_old_foreground_pgrp
);
274 if (wrapper_argv
!= NULL
)
276 struct thread_resume resume_info
;
279 resume_info
.thread
= pid_to_ptid (signal_pid
);
280 resume_info
.kind
= resume_continue
;
283 ptid
= mywait (pid_to_ptid (signal_pid
), &last_status
, 0, 0);
285 if (last_status
.kind
!= TARGET_WAITKIND_STOPPED
)
290 (*the_target
->resume
) (&resume_info
, 1);
292 mywait (pid_to_ptid (signal_pid
), &last_status
, 0, 0);
293 if (last_status
.kind
!= TARGET_WAITKIND_STOPPED
)
296 while (last_status
.value
.sig
!= TARGET_SIGNAL_TRAP
);
301 /* Wait till we are at 1st instruction in program, return new pid
302 (assuming success). */
303 last_ptid
= mywait (pid_to_ptid (signal_pid
), &last_status
, 0, 0);
309 attach_inferior (int pid
)
311 /* myattach should return -1 if attaching is unsupported,
312 0 if it succeeded, and call error() otherwise. */
314 if (myattach (pid
) != 0)
317 fprintf (stderr
, "Attached; pid = %d\n", pid
);
320 /* FIXME - It may be that we should get the SIGNAL_PID from the
321 attach function, so that it can be the main thread instead of
322 whichever we were told to attach to. */
327 last_ptid
= mywait (pid_to_ptid (pid
), &last_status
, 0, 0);
329 /* GDB knows to ignore the first SIGSTOP after attaching to a running
330 process using the "attach" command, but this is different; it's
331 just using "target remote". Pretend it's just starting up. */
332 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
333 && last_status
.value
.sig
== TARGET_SIGNAL_STOP
)
334 last_status
.value
.sig
= TARGET_SIGNAL_TRAP
;
340 extern int remote_debug
;
342 /* Decode a qXfer read request. Return 0 if everything looks OK,
346 decode_xfer_read (char *buf
, char **annex
, CORE_ADDR
*ofs
, unsigned int *len
)
348 /* Extract and NUL-terminate the annex. */
350 while (*buf
&& *buf
!= ':')
356 /* After the read marker and annex, qXfer looks like a
357 traditional 'm' packet. */
358 decode_m_packet (buf
, ofs
, len
);
363 /* Write the response to a successful qXfer read. Returns the
364 length of the (binary) data stored in BUF, corresponding
365 to as much of DATA/LEN as we could fit. IS_MORE controls
366 the first character of the response. */
368 write_qxfer_response (char *buf
, const void *data
, int len
, int is_more
)
377 return remote_escape_output (data
, len
, (unsigned char *) buf
+ 1, &out_len
,
381 /* Handle all of the extended 'Q' packets. */
384 handle_general_set (char *own_buf
)
386 if (strncmp ("QPassSignals:", own_buf
, strlen ("QPassSignals:")) == 0)
388 int numsigs
= (int) TARGET_SIGNAL_LAST
, i
;
389 const char *p
= own_buf
+ strlen ("QPassSignals:");
392 p
= decode_address_to_semicolon (&cursig
, p
);
393 for (i
= 0; i
< numsigs
; i
++)
399 /* Keep looping, to clear the remaining signals. */
402 p
= decode_address_to_semicolon (&cursig
, p
);
407 strcpy (own_buf
, "OK");
411 if (strcmp (own_buf
, "QStartNoAckMode") == 0)
415 fprintf (stderr
, "[noack mode enabled]\n");
424 if (strncmp (own_buf
, "QNonStop:", 9) == 0)
426 char *mode
= own_buf
+ 9;
430 if (strcmp (mode
, "0") == 0)
432 else if (strcmp (mode
, "1") == 0)
436 /* We don't know what this mode is, so complain to
438 fprintf (stderr
, "Unknown non-stop mode requested: %s\n",
444 req_str
= req
? "non-stop" : "all-stop";
445 if (start_non_stop (req
) != 0)
447 fprintf (stderr
, "Setting %s mode failed\n", req_str
);
455 fprintf (stderr
, "[%s mode enabled]\n", req_str
);
461 if (target_supports_tracepoints ()
462 && handle_tracepoint_general_set (own_buf
))
465 /* Otherwise we didn't know what packet it was. Say we didn't
471 get_features_xml (const char *annex
)
473 /* gdbserver_xmltarget defines what to return when looking
474 for the "target.xml" file. Its contents can either be
475 verbatim XML code (prefixed with a '@') or else the name
476 of the actual XML file to be used in place of "target.xml".
478 This variable is set up from the auto-generated
479 init_registers_... routine for the current target. */
481 if (gdbserver_xmltarget
482 && strcmp (annex
, "target.xml") == 0)
484 if (*gdbserver_xmltarget
== '@')
485 return gdbserver_xmltarget
+ 1;
487 annex
= gdbserver_xmltarget
;
492 extern const char *const xml_builtin
[][2];
495 /* Look for the annex. */
496 for (i
= 0; xml_builtin
[i
][0] != NULL
; i
++)
497 if (strcmp (annex
, xml_builtin
[i
][0]) == 0)
500 if (xml_builtin
[i
][0] != NULL
)
501 return xml_builtin
[i
][1];
509 monitor_show_help (void)
511 monitor_output ("The following monitor commands are supported:\n");
512 monitor_output (" set debug <0|1>\n");
513 monitor_output (" Enable general debugging messages\n");
514 monitor_output (" set debug-hw-points <0|1>\n");
515 monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
516 monitor_output (" set remote-debug <0|1>\n");
517 monitor_output (" Enable remote protocol debugging messages\n");
518 monitor_output (" exit\n");
519 monitor_output (" Quit GDBserver\n");
522 /* Read trace frame or inferior memory. */
525 read_memory (CORE_ADDR memaddr
, unsigned char *myaddr
, int len
)
527 if (current_traceframe
>= 0)
530 ULONGEST length
= len
;
532 if (traceframe_read_mem (current_traceframe
,
533 memaddr
, myaddr
, len
, &nbytes
))
535 /* Data read from trace buffer, we're done. */
536 if (nbytes
== length
)
538 if (!in_readonly_region (memaddr
, length
))
540 /* Otherwise we have a valid readonly case, fall through. */
541 /* (assume no half-trace half-real blocks for now) */
544 return read_inferior_memory (memaddr
, myaddr
, len
);
547 /* Write trace frame or inferior memory. Actually, writing to trace
548 frames is forbidden. */
551 write_memory (CORE_ADDR memaddr
, const unsigned char *myaddr
, int len
)
553 if (current_traceframe
>= 0)
556 return write_inferior_memory (memaddr
, myaddr
, len
);
559 /* Subroutine of handle_search_memory to simplify it. */
562 handle_search_memory_1 (CORE_ADDR start_addr
, CORE_ADDR search_space_len
,
563 gdb_byte
*pattern
, unsigned pattern_len
,
564 gdb_byte
*search_buf
,
565 unsigned chunk_size
, unsigned search_buf_size
,
566 CORE_ADDR
*found_addrp
)
568 /* Prime the search buffer. */
570 if (read_memory (start_addr
, search_buf
, search_buf_size
) != 0)
572 warning ("Unable to access target memory at 0x%lx, halting search.",
577 /* Perform the search.
579 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
580 When we've scanned N bytes we copy the trailing bytes to the start and
581 read in another N bytes. */
583 while (search_space_len
>= pattern_len
)
586 unsigned nr_search_bytes
= (search_space_len
< search_buf_size
590 found_ptr
= memmem (search_buf
, nr_search_bytes
, pattern
, pattern_len
);
592 if (found_ptr
!= NULL
)
594 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
595 *found_addrp
= found_addr
;
599 /* Not found in this chunk, skip to next chunk. */
601 /* Don't let search_space_len wrap here, it's unsigned. */
602 if (search_space_len
>= chunk_size
)
603 search_space_len
-= chunk_size
;
605 search_space_len
= 0;
607 if (search_space_len
>= pattern_len
)
609 unsigned keep_len
= search_buf_size
- chunk_size
;
610 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
613 /* Copy the trailing part of the previous iteration to the front
614 of the buffer for the next iteration. */
615 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
617 nr_to_read
= (search_space_len
- keep_len
< chunk_size
618 ? search_space_len
- keep_len
621 if (read_memory (read_addr
, search_buf
+ keep_len
,
624 warning ("Unable to access target memory at 0x%lx, halting search.",
629 start_addr
+= chunk_size
;
638 /* Handle qSearch:memory packets. */
641 handle_search_memory (char *own_buf
, int packet_len
)
643 CORE_ADDR start_addr
;
644 CORE_ADDR search_space_len
;
646 unsigned int pattern_len
;
647 /* NOTE: also defined in find.c testcase. */
648 #define SEARCH_CHUNK_SIZE 16000
649 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
650 /* Buffer to hold memory contents for searching. */
651 gdb_byte
*search_buf
;
652 unsigned search_buf_size
;
654 CORE_ADDR found_addr
;
655 int cmd_name_len
= sizeof ("qSearch:memory:") - 1;
657 pattern
= malloc (packet_len
);
660 error ("Unable to allocate memory to perform the search");
661 strcpy (own_buf
, "E00");
664 if (decode_search_memory_packet (own_buf
+ cmd_name_len
,
665 packet_len
- cmd_name_len
,
666 &start_addr
, &search_space_len
,
667 pattern
, &pattern_len
) < 0)
670 error ("Error in parsing qSearch:memory packet");
671 strcpy (own_buf
, "E00");
675 search_buf_size
= chunk_size
+ pattern_len
- 1;
677 /* No point in trying to allocate a buffer larger than the search space. */
678 if (search_space_len
< search_buf_size
)
679 search_buf_size
= search_space_len
;
681 search_buf
= malloc (search_buf_size
);
682 if (search_buf
== NULL
)
685 error ("Unable to allocate memory to perform the search");
686 strcpy (own_buf
, "E00");
690 found
= handle_search_memory_1 (start_addr
, search_space_len
,
691 pattern
, pattern_len
,
692 search_buf
, chunk_size
, search_buf_size
,
696 sprintf (own_buf
, "1,%lx", (long) found_addr
);
698 strcpy (own_buf
, "0");
700 strcpy (own_buf
, "E00");
706 #define require_running(BUF) \
707 if (!target_running ()) \
713 /* Handle monitor commands not handled by target-specific handlers. */
716 handle_monitor_command (char *mon
)
718 if (strcmp (mon
, "set debug 1") == 0)
721 monitor_output ("Debug output enabled.\n");
723 else if (strcmp (mon
, "set debug 0") == 0)
726 monitor_output ("Debug output disabled.\n");
728 else if (strcmp (mon
, "set debug-hw-points 1") == 0)
731 monitor_output ("H/W point debugging output enabled.\n");
733 else if (strcmp (mon
, "set debug-hw-points 0") == 0)
736 monitor_output ("H/W point debugging output disabled.\n");
738 else if (strcmp (mon
, "set remote-debug 1") == 0)
741 monitor_output ("Protocol debug output enabled.\n");
743 else if (strcmp (mon
, "set remote-debug 0") == 0)
746 monitor_output ("Protocol debug output disabled.\n");
748 else if (strcmp (mon
, "help") == 0)
749 monitor_show_help ();
750 else if (strcmp (mon
, "exit") == 0)
754 monitor_output ("Unknown monitor command.\n\n");
755 monitor_show_help ();
761 handle_threads_qxfer_proper (struct buffer
*buffer
)
763 struct inferior_list_entry
*thread
;
765 buffer_grow_str (buffer
, "<threads>\n");
767 for (thread
= all_threads
.head
; thread
; thread
= thread
->next
)
769 ptid_t ptid
= thread_to_gdb_id ((struct thread_info
*)thread
);
774 write_ptid (ptid_s
, ptid
);
776 if (the_target
->core_of_thread
)
777 core
= (*the_target
->core_of_thread
) (ptid
);
781 sprintf (core_s
, "%d", core
);
782 buffer_xml_printf (buffer
, "<thread id=\"%s\" core=\"%s\"/>\n",
787 buffer_xml_printf (buffer
, "<thread id=\"%s\"/>\n",
792 buffer_grow_str0 (buffer
, "</threads>\n");
796 handle_threads_qxfer (const char *annex
,
797 unsigned char *readbuf
,
798 CORE_ADDR offset
, int length
)
800 static char *result
= 0;
801 static unsigned int result_length
= 0;
803 if (annex
&& strcmp (annex
, "") != 0)
808 struct buffer buffer
;
809 /* When asked for data at offset 0, generate everything and store into
810 'result'. Successive reads will be served off 'result'. */
814 buffer_init (&buffer
);
816 handle_threads_qxfer_proper (&buffer
);
818 result
= buffer_finish (&buffer
);
819 result_length
= strlen (result
);
820 buffer_free (&buffer
);
823 if (offset
>= result_length
)
825 /* We're out of data. */
832 if (length
> result_length
- offset
)
833 length
= result_length
- offset
;
835 memcpy (readbuf
, result
+ offset
, length
);
841 /* Table used by the crc32 function to calcuate the checksum. */
843 static unsigned int crc32_table
[256] =
846 /* Compute 32 bit CRC from inferior memory.
848 On success, return 32 bit CRC.
849 On failure, return (unsigned long long) -1. */
851 static unsigned long long
852 crc32 (CORE_ADDR base
, int len
, unsigned int crc
)
856 /* Initialize the CRC table and the decoding table. */
860 for (i
= 0; i
< 256; i
++)
862 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
863 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
870 unsigned char byte
= 0;
872 /* Return failure if memory read fails. */
873 if (read_inferior_memory (base
, &byte
, 1) != 0)
874 return (unsigned long long) -1;
876 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ byte
) & 255];
879 return (unsigned long long) crc
;
882 /* Handle all of the extended 'q' packets. */
884 handle_query (char *own_buf
, int packet_len
, int *new_packet_len_p
)
886 static struct inferior_list_entry
*thread_ptr
;
888 /* Reply the current thread id. */
889 if (strcmp ("qC", own_buf
) == 0 && !disable_packet_qC
)
892 require_running (own_buf
);
894 if (!ptid_equal (general_thread
, null_ptid
)
895 && !ptid_equal (general_thread
, minus_one_ptid
))
896 gdb_id
= general_thread
;
899 thread_ptr
= all_threads
.head
;
900 gdb_id
= thread_to_gdb_id ((struct thread_info
*)thread_ptr
);
903 sprintf (own_buf
, "QC");
905 own_buf
= write_ptid (own_buf
, gdb_id
);
909 if (strcmp ("qSymbol::", own_buf
) == 0)
911 /* GDB is suggesting new symbols have been loaded. This may
912 mean a new shared library has been detected as loaded, so
913 take the opportunity to check if breakpoints we think are
914 inserted, still are. Note that it isn't guaranteed that
915 we'll see this when a shared library is loaded, and nor will
916 we see this for unloads (although breakpoints in unloaded
917 libraries shouldn't trigger), as GDB may not find symbols for
918 the library at all. We also re-validate breakpoints when we
919 see a second GDB breakpoint for the same address, and or when
920 we access breakpoint shadows. */
921 validate_breakpoints ();
923 if (target_supports_tracepoints ())
924 tracepoint_look_up_symbols ();
926 if (target_running () && the_target
->look_up_symbols
!= NULL
)
927 (*the_target
->look_up_symbols
) ();
929 strcpy (own_buf
, "OK");
933 if (!disable_packet_qfThreadInfo
)
935 if (strcmp ("qfThreadInfo", own_buf
) == 0)
939 require_running (own_buf
);
940 thread_ptr
= all_threads
.head
;
943 gdb_id
= thread_to_gdb_id ((struct thread_info
*)thread_ptr
);
944 write_ptid (own_buf
, gdb_id
);
945 thread_ptr
= thread_ptr
->next
;
949 if (strcmp ("qsThreadInfo", own_buf
) == 0)
953 require_running (own_buf
);
954 if (thread_ptr
!= NULL
)
957 gdb_id
= thread_to_gdb_id ((struct thread_info
*)thread_ptr
);
958 write_ptid (own_buf
, gdb_id
);
959 thread_ptr
= thread_ptr
->next
;
964 sprintf (own_buf
, "l");
970 if (the_target
->read_offsets
!= NULL
971 && strcmp ("qOffsets", own_buf
) == 0)
973 CORE_ADDR text
, data
;
975 require_running (own_buf
);
976 if (the_target
->read_offsets (&text
, &data
))
977 sprintf (own_buf
, "Text=%lX;Data=%lX;Bss=%lX",
978 (long)text
, (long)data
, (long)data
);
985 if (the_target
->qxfer_spu
!= NULL
986 && strncmp ("qXfer:spu:read:", own_buf
, 15) == 0)
992 unsigned char *spu_buf
;
994 require_running (own_buf
);
995 strcpy (own_buf
, "E00");
996 if (decode_xfer_read (own_buf
+ 15, &annex
, &ofs
, &len
) < 0)
998 if (len
> PBUFSIZ
- 2)
1000 spu_buf
= malloc (len
+ 1);
1004 n
= (*the_target
->qxfer_spu
) (annex
, spu_buf
, NULL
, ofs
, len
+ 1);
1006 write_enn (own_buf
);
1008 *new_packet_len_p
= write_qxfer_response (own_buf
, spu_buf
, len
, 1);
1010 *new_packet_len_p
= write_qxfer_response (own_buf
, spu_buf
, n
, 0);
1016 if (the_target
->qxfer_spu
!= NULL
1017 && strncmp ("qXfer:spu:write:", own_buf
, 16) == 0)
1023 unsigned char *spu_buf
;
1025 require_running (own_buf
);
1026 strcpy (own_buf
, "E00");
1027 spu_buf
= malloc (packet_len
- 15);
1030 if (decode_xfer_write (own_buf
+ 16, packet_len
- 16, &annex
,
1031 &ofs
, &len
, spu_buf
) < 0)
1037 n
= (*the_target
->qxfer_spu
)
1038 (annex
, NULL
, (unsigned const char *)spu_buf
, ofs
, len
);
1040 write_enn (own_buf
);
1042 sprintf (own_buf
, "%x", n
);
1048 if (the_target
->read_auxv
!= NULL
1049 && strncmp ("qXfer:auxv:read:", own_buf
, 16) == 0)
1051 unsigned char *data
;
1057 require_running (own_buf
);
1059 /* Reject any annex; grab the offset and length. */
1060 if (decode_xfer_read (own_buf
+ 16, &annex
, &ofs
, &len
) < 0
1061 || annex
[0] != '\0')
1063 strcpy (own_buf
, "E00");
1067 /* Read one extra byte, as an indicator of whether there is
1069 if (len
> PBUFSIZ
- 2)
1071 data
= malloc (len
+ 1);
1074 write_enn (own_buf
);
1077 n
= (*the_target
->read_auxv
) (ofs
, data
, len
+ 1);
1079 write_enn (own_buf
);
1081 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, len
, 1);
1083 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, n
, 0);
1090 if (strncmp ("qXfer:features:read:", own_buf
, 20) == 0)
1093 unsigned int len
, total_len
;
1094 const char *document
;
1097 require_running (own_buf
);
1099 /* Grab the annex, offset, and length. */
1100 if (decode_xfer_read (own_buf
+ 20, &annex
, &ofs
, &len
) < 0)
1102 strcpy (own_buf
, "E00");
1106 /* Now grab the correct annex. */
1107 document
= get_features_xml (annex
);
1108 if (document
== NULL
)
1110 strcpy (own_buf
, "E00");
1114 total_len
= strlen (document
);
1115 if (len
> PBUFSIZ
- 2)
1118 if (ofs
> total_len
)
1119 write_enn (own_buf
);
1120 else if (len
< total_len
- ofs
)
1121 *new_packet_len_p
= write_qxfer_response (own_buf
, document
+ ofs
,
1124 *new_packet_len_p
= write_qxfer_response (own_buf
, document
+ ofs
,
1125 total_len
- ofs
, 0);
1130 if (strncmp ("qXfer:libraries:read:", own_buf
, 21) == 0)
1133 unsigned int len
, total_len
;
1135 struct inferior_list_entry
*dll_ptr
;
1138 require_running (own_buf
);
1140 /* Reject any annex; grab the offset and length. */
1141 if (decode_xfer_read (own_buf
+ 21, &annex
, &ofs
, &len
) < 0
1142 || annex
[0] != '\0')
1144 strcpy (own_buf
, "E00");
1148 /* Over-estimate the necessary memory. Assume that every character
1149 in the library name must be escaped. */
1151 for (dll_ptr
= all_dlls
.head
; dll_ptr
!= NULL
; dll_ptr
= dll_ptr
->next
)
1152 total_len
+= 128 + 6 * strlen (((struct dll_info
*) dll_ptr
)->name
);
1154 document
= malloc (total_len
);
1155 if (document
== NULL
)
1157 write_enn (own_buf
);
1160 strcpy (document
, "<library-list>\n");
1161 p
= document
+ strlen (document
);
1163 for (dll_ptr
= all_dlls
.head
; dll_ptr
!= NULL
; dll_ptr
= dll_ptr
->next
)
1165 struct dll_info
*dll
= (struct dll_info
*) dll_ptr
;
1168 strcpy (p
, " <library name=\"");
1170 name
= xml_escape_text (dll
->name
);
1174 strcpy (p
, "\"><segment address=\"");
1176 sprintf (p
, "0x%lx", (long) dll
->base_addr
);
1178 strcpy (p
, "\"/></library>\n");
1182 strcpy (p
, "</library-list>\n");
1184 total_len
= strlen (document
);
1185 if (len
> PBUFSIZ
- 2)
1188 if (ofs
> total_len
)
1189 write_enn (own_buf
);
1190 else if (len
< total_len
- ofs
)
1191 *new_packet_len_p
= write_qxfer_response (own_buf
, document
+ ofs
,
1194 *new_packet_len_p
= write_qxfer_response (own_buf
, document
+ ofs
,
1195 total_len
- ofs
, 0);
1201 if (the_target
->qxfer_osdata
!= NULL
1202 && strncmp ("qXfer:osdata:read:", own_buf
, 18) == 0)
1208 unsigned char *workbuf
;
1210 strcpy (own_buf
, "E00");
1211 if (decode_xfer_read (own_buf
+ 18, &annex
, &ofs
, &len
) < 0)
1213 if (len
> PBUFSIZ
- 2)
1215 workbuf
= malloc (len
+ 1);
1219 n
= (*the_target
->qxfer_osdata
) (annex
, workbuf
, NULL
, ofs
, len
+ 1);
1221 write_enn (own_buf
);
1223 *new_packet_len_p
= write_qxfer_response (own_buf
, workbuf
, len
, 1);
1225 *new_packet_len_p
= write_qxfer_response (own_buf
, workbuf
, n
, 0);
1231 if (the_target
->qxfer_siginfo
!= NULL
1232 && strncmp ("qXfer:siginfo:read:", own_buf
, 19) == 0)
1234 unsigned char *data
;
1240 require_running (own_buf
);
1242 /* Reject any annex; grab the offset and length. */
1243 if (decode_xfer_read (own_buf
+ 19, &annex
, &ofs
, &len
) < 0
1244 || annex
[0] != '\0')
1246 strcpy (own_buf
, "E00");
1250 /* Read one extra byte, as an indicator of whether there is
1252 if (len
> PBUFSIZ
- 2)
1254 data
= malloc (len
+ 1);
1257 n
= (*the_target
->qxfer_siginfo
) (annex
, data
, NULL
, ofs
, len
+ 1);
1259 write_enn (own_buf
);
1261 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, len
, 1);
1263 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, n
, 0);
1269 if (the_target
->qxfer_siginfo
!= NULL
1270 && strncmp ("qXfer:siginfo:write:", own_buf
, 20) == 0)
1276 unsigned char *data
;
1278 require_running (own_buf
);
1280 strcpy (own_buf
, "E00");
1281 data
= malloc (packet_len
- 19);
1284 if (decode_xfer_write (own_buf
+ 20, packet_len
- 20, &annex
,
1285 &ofs
, &len
, data
) < 0)
1291 n
= (*the_target
->qxfer_siginfo
)
1292 (annex
, NULL
, (unsigned const char *)data
, ofs
, len
);
1294 write_enn (own_buf
);
1296 sprintf (own_buf
, "%x", n
);
1302 if (strncmp ("qXfer:threads:read:", own_buf
, 19) == 0)
1304 unsigned char *data
;
1310 require_running (own_buf
);
1312 /* Reject any annex; grab the offset and length. */
1313 if (decode_xfer_read (own_buf
+ 19, &annex
, &ofs
, &len
) < 0
1314 || annex
[0] != '\0')
1316 strcpy (own_buf
, "E00");
1320 /* Read one extra byte, as an indicator of whether there is
1322 if (len
> PBUFSIZ
- 2)
1324 data
= malloc (len
+ 1);
1327 n
= handle_threads_qxfer (annex
, data
, ofs
, len
+ 1);
1329 write_enn (own_buf
);
1331 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, len
, 1);
1333 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, n
, 0);
1339 /* Protocol features query. */
1340 if (strncmp ("qSupported", own_buf
, 10) == 0
1341 && (own_buf
[10] == ':' || own_buf
[10] == '\0'))
1343 char *p
= &own_buf
[10];
1344 int gdb_supports_qRelocInsn
= 0;
1346 /* Start processing qSupported packet. */
1347 target_process_qsupported (NULL
);
1349 /* Process each feature being provided by GDB. The first
1350 feature will follow a ':', and latter features will follow
1354 char **qsupported
= NULL
;
1358 /* Two passes, to avoid nested strtok calls in
1359 target_process_qsupported. */
1360 for (p
= strtok (p
+ 1, ";");
1362 p
= strtok (NULL
, ";"))
1365 qsupported
= xrealloc (qsupported
, count
* sizeof (char *));
1366 qsupported
[count
- 1] = xstrdup (p
);
1369 for (i
= 0; i
< count
; i
++)
1372 if (strcmp (p
, "multiprocess+") == 0)
1374 /* GDB supports and wants multi-process support if
1376 if (target_supports_multi_process ())
1379 else if (strcmp (p
, "qRelocInsn+") == 0)
1381 /* GDB supports relocate instruction requests. */
1382 gdb_supports_qRelocInsn
= 1;
1385 target_process_qsupported (p
);
1393 sprintf (own_buf
, "PacketSize=%x;QPassSignals+", PBUFSIZ
- 1);
1395 /* We do not have any hook to indicate whether the target backend
1396 supports qXfer:libraries:read, so always report it. */
1397 strcat (own_buf
, ";qXfer:libraries:read+");
1399 if (the_target
->read_auxv
!= NULL
)
1400 strcat (own_buf
, ";qXfer:auxv:read+");
1402 if (the_target
->qxfer_spu
!= NULL
)
1403 strcat (own_buf
, ";qXfer:spu:read+;qXfer:spu:write+");
1405 if (the_target
->qxfer_siginfo
!= NULL
)
1406 strcat (own_buf
, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
1408 /* We always report qXfer:features:read, as targets may
1409 install XML files on a subsequent call to arch_setup.
1410 If we reported to GDB on startup that we don't support
1411 qXfer:feature:read at all, we will never be re-queried. */
1412 strcat (own_buf
, ";qXfer:features:read+");
1414 if (transport_is_reliable
)
1415 strcat (own_buf
, ";QStartNoAckMode+");
1417 if (the_target
->qxfer_osdata
!= NULL
)
1418 strcat (own_buf
, ";qXfer:osdata:read+");
1420 if (target_supports_multi_process ())
1421 strcat (own_buf
, ";multiprocess+");
1423 if (target_supports_non_stop ())
1424 strcat (own_buf
, ";QNonStop+");
1426 strcat (own_buf
, ";qXfer:threads:read+");
1428 if (target_supports_tracepoints ())
1430 strcat (own_buf
, ";ConditionalTracepoints+");
1431 strcat (own_buf
, ";TraceStateVariables+");
1432 strcat (own_buf
, ";TracepointSource+");
1433 strcat (own_buf
, ";DisconnectedTracing+");
1434 if (gdb_supports_qRelocInsn
&& target_supports_fast_tracepoints ())
1435 strcat (own_buf
, ";FastTracepoints+");
1441 /* Thread-local storage support. */
1442 if (the_target
->get_tls_address
!= NULL
1443 && strncmp ("qGetTLSAddr:", own_buf
, 12) == 0)
1445 char *p
= own_buf
+ 12;
1446 CORE_ADDR parts
[2], address
= 0;
1448 ptid_t ptid
= null_ptid
;
1450 require_running (own_buf
);
1452 for (i
= 0; i
< 3; i
++)
1460 p2
= strchr (p
, ',');
1473 ptid
= read_ptid (p
, NULL
);
1475 decode_address (&parts
[i
- 1], p
, len
);
1479 if (p
!= NULL
|| i
< 3)
1483 struct thread_info
*thread
= find_thread_ptid (ptid
);
1488 err
= the_target
->get_tls_address (thread
, parts
[0], parts
[1],
1494 sprintf (own_buf
, "%llx", address
);
1499 write_enn (own_buf
);
1503 /* Otherwise, pretend we do not understand this packet. */
1506 /* Windows OS Thread Information Block address support. */
1507 if (the_target
->get_tib_address
!= NULL
1508 && strncmp ("qGetTIBAddr:", own_buf
, 12) == 0)
1513 ptid_t ptid
= read_ptid (own_buf
+ 12, &annex
);
1515 n
= (*the_target
->get_tib_address
) (ptid
, &tlb
);
1518 sprintf (own_buf
, "%llx", tlb
);
1523 write_enn (own_buf
);
1529 /* Handle "monitor" commands. */
1530 if (strncmp ("qRcmd,", own_buf
, 6) == 0)
1532 char *mon
= malloc (PBUFSIZ
);
1533 int len
= strlen (own_buf
+ 6);
1537 write_enn (own_buf
);
1541 if ((len
% 2) != 0 || unhexify (mon
, own_buf
+ 6, len
/ 2) != len
/ 2)
1543 write_enn (own_buf
);
1547 mon
[len
/ 2] = '\0';
1551 if (the_target
->handle_monitor_command
== NULL
1552 || (*the_target
->handle_monitor_command
) (mon
) == 0)
1553 /* Default processing. */
1554 handle_monitor_command (mon
);
1560 if (strncmp ("qSearch:memory:", own_buf
, sizeof ("qSearch:memory:") - 1) == 0)
1562 require_running (own_buf
);
1563 handle_search_memory (own_buf
, packet_len
);
1567 if (strcmp (own_buf
, "qAttached") == 0
1568 || strncmp (own_buf
, "qAttached:", sizeof ("qAttached:") - 1) == 0)
1570 struct process_info
*process
;
1572 if (own_buf
[sizeof ("qAttached") - 1])
1574 int pid
= strtoul (own_buf
+ sizeof ("qAttached:") - 1, NULL
, 16);
1575 process
= (struct process_info
*)
1576 find_inferior_id (&all_processes
, pid_to_ptid (pid
));
1580 require_running (own_buf
);
1581 process
= current_process ();
1584 if (process
== NULL
)
1586 write_enn (own_buf
);
1590 strcpy (own_buf
, process
->attached
? "1" : "0");
1594 if (strncmp ("qCRC:", own_buf
, 5) == 0)
1596 /* CRC check (compare-section). */
1600 unsigned long long crc
;
1602 require_running (own_buf
);
1603 base
= strtoul (own_buf
+ 5, &comma
, 16);
1604 if (*comma
++ != ',')
1606 write_enn (own_buf
);
1609 len
= strtoul (comma
, NULL
, 16);
1610 crc
= crc32 (base
, len
, 0xffffffff);
1611 /* Check for memory failure. */
1612 if (crc
== (unsigned long long) -1)
1614 write_enn (own_buf
);
1617 sprintf (own_buf
, "C%lx", (unsigned long) crc
);
1621 if (target_supports_tracepoints () && handle_tracepoint_query (own_buf
))
1624 /* Otherwise we didn't know what packet it was. Say we didn't
1629 /* Parse vCont packets. */
1631 handle_v_cont (char *own_buf
)
1635 struct thread_resume
*resume_info
;
1636 struct thread_resume default_action
= {{0}};
1638 /* Count the number of semicolons in the packet. There should be one
1639 for every action. */
1645 p
= strchr (p
, ';');
1648 resume_info
= malloc (n
* sizeof (resume_info
[0]));
1649 if (resume_info
== NULL
)
1657 if (p
[0] == 's' || p
[0] == 'S')
1658 resume_info
[i
].kind
= resume_step
;
1659 else if (p
[0] == 'c' || p
[0] == 'C')
1660 resume_info
[i
].kind
= resume_continue
;
1661 else if (p
[0] == 't')
1662 resume_info
[i
].kind
= resume_stop
;
1666 if (p
[0] == 'S' || p
[0] == 'C')
1669 sig
= strtol (p
+ 1, &q
, 16);
1674 if (!target_signal_to_host_p (sig
))
1676 resume_info
[i
].sig
= target_signal_to_host (sig
);
1680 resume_info
[i
].sig
= 0;
1686 resume_info
[i
].thread
= minus_one_ptid
;
1687 default_action
= resume_info
[i
];
1689 /* Note: we don't increment i here, we'll overwrite this entry
1690 the next time through. */
1692 else if (p
[0] == ':')
1694 ptid_t ptid
= read_ptid (p
+ 1, &q
);
1699 if (p
[0] != ';' && p
[0] != 0)
1702 resume_info
[i
].thread
= ptid
;
1709 resume_info
[i
] = default_action
;
1711 /* Still used in occasional places in the backend. */
1713 && !ptid_equal (resume_info
[0].thread
, minus_one_ptid
)
1714 && resume_info
[0].kind
!= resume_stop
)
1715 cont_thread
= resume_info
[0].thread
;
1717 cont_thread
= minus_one_ptid
;
1718 set_desired_inferior (0);
1723 (*the_target
->resume
) (resume_info
, n
);
1731 last_ptid
= mywait (minus_one_ptid
, &last_status
, 0, 1);
1732 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
1733 disable_async_io ();
1738 write_enn (own_buf
);
1743 /* Attach to a new program. Return 1 if successful, 0 if failure. */
1745 handle_v_attach (char *own_buf
)
1749 pid
= strtol (own_buf
+ 8, NULL
, 16);
1750 if (pid
!= 0 && attach_inferior (pid
) == 0)
1752 /* Don't report shared library events after attaching, even if
1753 some libraries are preloaded. GDB will always poll the
1754 library list. Avoids the "stopped by shared library event"
1755 notice on the GDB side. */
1760 /* In non-stop, we don't send a resume reply. Stop events
1761 will follow up using the normal notification
1766 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
1772 write_enn (own_buf
);
1777 /* Run a new program. Return 1 if successful, 0 if failure. */
1779 handle_v_run (char *own_buf
)
1781 char *p
, *next_p
, **new_argv
;
1785 for (p
= own_buf
+ strlen ("vRun;"); p
&& *p
; p
= strchr (p
, ';'))
1791 new_argv
= calloc (new_argc
+ 2, sizeof (char *));
1792 if (new_argv
== NULL
)
1794 write_enn (own_buf
);
1799 for (p
= own_buf
+ strlen ("vRun;"); *p
; p
= next_p
)
1801 next_p
= strchr (p
, ';');
1803 next_p
= p
+ strlen (p
);
1805 if (i
== 0 && p
== next_p
)
1809 /* FIXME: Fail request if out of memory instead of dying. */
1810 new_argv
[i
] = xmalloc (1 + (next_p
- p
) / 2);
1811 unhexify (new_argv
[i
], p
, (next_p
- p
) / 2);
1812 new_argv
[i
][(next_p
- p
) / 2] = '\0';
1821 if (new_argv
[0] == NULL
)
1823 /* GDB didn't specify a program to run. Use the program from the
1824 last run with the new argument list. */
1826 if (program_argv
== NULL
)
1828 /* FIXME: new_argv memory leak */
1829 write_enn (own_buf
);
1833 new_argv
[0] = strdup (program_argv
[0]);
1834 if (new_argv
[0] == NULL
)
1836 /* FIXME: new_argv memory leak */
1837 write_enn (own_buf
);
1842 /* Free the old argv and install the new one. */
1843 freeargv (program_argv
);
1844 program_argv
= new_argv
;
1846 start_inferior (program_argv
);
1847 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
1849 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
1851 /* In non-stop, sending a resume reply doesn't set the general
1852 thread, but GDB assumes a vRun sets it (this is so GDB can
1853 query which is the main thread of the new inferior. */
1855 general_thread
= last_ptid
;
1861 write_enn (own_buf
);
1866 /* Kill process. Return 1 if successful, 0 if failure. */
1868 handle_v_kill (char *own_buf
)
1871 char *p
= &own_buf
[6];
1873 pid
= strtol (p
, NULL
, 16);
1876 if (pid
!= 0 && kill_inferior (pid
) == 0)
1878 last_status
.kind
= TARGET_WAITKIND_SIGNALLED
;
1879 last_status
.value
.sig
= TARGET_SIGNAL_KILL
;
1880 last_ptid
= pid_to_ptid (pid
);
1881 discard_queued_stop_replies (pid
);
1887 write_enn (own_buf
);
1892 /* Handle a 'vStopped' packet. */
1894 handle_v_stopped (char *own_buf
)
1896 /* If we're waiting for GDB to acknowledge a pending stop reply,
1897 consider that done. */
1900 struct vstop_notif
*head
;
1903 fprintf (stderr
, "vStopped: acking %s\n",
1904 target_pid_to_str (notif_queue
->ptid
));
1907 notif_queue
= notif_queue
->next
;
1911 /* Push another stop reply, or if there are no more left, an OK. */
1912 send_next_stop_reply (own_buf
);
1915 /* Handle all of the extended 'v' packets. */
1917 handle_v_requests (char *own_buf
, int packet_len
, int *new_packet_len
)
1919 if (!disable_packet_vCont
)
1921 if (strncmp (own_buf
, "vCont;", 6) == 0)
1923 require_running (own_buf
);
1924 handle_v_cont (own_buf
);
1928 if (strncmp (own_buf
, "vCont?", 6) == 0)
1930 strcpy (own_buf
, "vCont;c;C;s;S;t");
1935 if (strncmp (own_buf
, "vFile:", 6) == 0
1936 && handle_vFile (own_buf
, packet_len
, new_packet_len
))
1939 if (strncmp (own_buf
, "vAttach;", 8) == 0)
1941 if (!multi_process
&& target_running ())
1943 fprintf (stderr
, "Already debugging a process\n");
1944 write_enn (own_buf
);
1947 handle_v_attach (own_buf
);
1951 if (strncmp (own_buf
, "vRun;", 5) == 0)
1953 if (!multi_process
&& target_running ())
1955 fprintf (stderr
, "Already debugging a process\n");
1956 write_enn (own_buf
);
1959 handle_v_run (own_buf
);
1963 if (strncmp (own_buf
, "vKill;", 6) == 0)
1965 if (!target_running ())
1967 fprintf (stderr
, "No process to kill\n");
1968 write_enn (own_buf
);
1971 handle_v_kill (own_buf
);
1975 if (strncmp (own_buf
, "vStopped", 8) == 0)
1977 handle_v_stopped (own_buf
);
1981 /* Otherwise we didn't know what packet it was. Say we didn't
1987 /* Resume inferior and wait for another event. In non-stop mode,
1988 don't really wait here, but return immediatelly to the event
1991 myresume (char *own_buf
, int step
, int sig
)
1993 struct thread_resume resume_info
[2];
1995 int valid_cont_thread
;
1997 set_desired_inferior (0);
1999 valid_cont_thread
= (!ptid_equal (cont_thread
, null_ptid
)
2000 && !ptid_equal (cont_thread
, minus_one_ptid
));
2002 if (step
|| sig
|| valid_cont_thread
)
2004 resume_info
[0].thread
2005 = ((struct inferior_list_entry
*) current_inferior
)->id
;
2007 resume_info
[0].kind
= resume_step
;
2009 resume_info
[0].kind
= resume_continue
;
2010 resume_info
[0].sig
= sig
;
2014 if (!valid_cont_thread
)
2016 resume_info
[n
].thread
= minus_one_ptid
;
2017 resume_info
[n
].kind
= resume_continue
;
2018 resume_info
[n
].sig
= 0;
2025 (*the_target
->resume
) (resume_info
, n
);
2031 last_ptid
= mywait (minus_one_ptid
, &last_status
, 0, 1);
2032 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2033 disable_async_io ();
2037 /* Callback for for_each_inferior. Make a new stop reply for each
2041 queue_stop_reply_callback (struct inferior_list_entry
*entry
, void *arg
)
2043 struct thread_info
*thread
= (struct thread_info
*) entry
;
2045 /* For now, assume targets that don't have this callback also don't
2046 manage the thread's last_status field. */
2047 if (the_target
->thread_stopped
== NULL
)
2049 struct target_waitstatus status
;
2051 status
.kind
= TARGET_WAITKIND_STOPPED
;
2052 status
.value
.sig
= TARGET_SIGNAL_TRAP
;
2054 /* Pass the last stop reply back to GDB, but don't notify
2056 queue_stop_reply (entry
->id
, &thread
->last_status
);
2060 if (thread_stopped (thread
))
2063 fprintf (stderr
, "Reporting thread %s as already stopped with %s\n",
2064 target_pid_to_str (entry
->id
),
2065 target_waitstatus_to_string (&thread
->last_status
));
2067 /* Pass the last stop reply back to GDB, but don't notify
2069 queue_stop_reply (entry
->id
, &thread
->last_status
);
2076 /* Set this inferior LWP's state as "want-stopped". We won't resume
2077 this LWP until the client gives us another action for it. */
2080 gdb_wants_thread_stopped (struct inferior_list_entry
*entry
)
2082 struct thread_info
*thread
= (struct thread_info
*) entry
;
2084 thread
->last_resume_kind
= resume_stop
;
2086 if (thread
->last_status
.kind
== TARGET_WAITKIND_IGNORE
)
2088 thread
->last_status
.kind
= TARGET_WAITKIND_STOPPED
;
2089 thread
->last_status
.value
.sig
= TARGET_SIGNAL_0
;
2093 /* Set all threads' states as "want-stopped". */
2096 gdb_wants_all_threads_stopped (void)
2098 for_each_inferior (&all_threads
, gdb_wants_thread_stopped
);
2101 /* Clear the gdb_detached flag of every process. */
2104 gdb_reattached_process (struct inferior_list_entry
*entry
)
2106 struct process_info
*process
= (struct process_info
*) entry
;
2108 process
->gdb_detached
= 0;
2111 /* Status handler for the '?' packet. */
2114 handle_status (char *own_buf
)
2116 /* GDB is connected, don't forward events to the target anymore. */
2117 for_each_inferior (&all_processes
, gdb_reattached_process
);
2119 /* In non-stop mode, we must send a stop reply for each stopped
2120 thread. In all-stop mode, just send one for the first stopped
2125 discard_queued_stop_replies (-1);
2126 find_inferior (&all_threads
, queue_stop_reply_callback
, NULL
);
2128 /* The first is sent immediatly. OK is sent if there is no
2129 stopped thread, which is the same handling of the vStopped
2130 packet (by design). */
2131 send_next_stop_reply (own_buf
);
2136 stabilize_threads ();
2137 gdb_wants_all_threads_stopped ();
2139 if (all_threads
.head
)
2141 struct target_waitstatus status
;
2143 status
.kind
= TARGET_WAITKIND_STOPPED
;
2144 status
.value
.sig
= TARGET_SIGNAL_TRAP
;
2145 prepare_resume_reply (own_buf
,
2146 all_threads
.head
->id
, &status
);
2149 strcpy (own_buf
, "W00");
2154 gdbserver_version (void)
2156 printf ("GNU gdbserver %s%s\n"
2157 "Copyright (C) 2010 Free Software Foundation, Inc.\n"
2158 "gdbserver is free software, covered by the GNU General Public License.\n"
2159 "This gdbserver was configured as \"%s\"\n",
2160 PKGVERSION
, version
, host_name
);
2164 gdbserver_usage (FILE *stream
)
2166 fprintf (stream
, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
2167 "\tgdbserver [OPTIONS] --attach COMM PID\n"
2168 "\tgdbserver [OPTIONS] --multi COMM\n"
2170 "COMM may either be a tty device (for serial debugging), or \n"
2171 "HOST:PORT to listen for a TCP connection.\n"
2174 " --debug Enable general debugging output.\n"
2175 " --remote-debug Enable remote protocol debugging output.\n"
2176 " --version Display version information and exit.\n"
2177 " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n");
2178 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
2179 fprintf (stream
, "Report bugs to \"%s\".\n", REPORT_BUGS_TO
);
2183 gdbserver_show_disableable (FILE *stream
)
2185 fprintf (stream
, "Disableable packets:\n"
2186 " vCont \tAll vCont packets\n"
2187 " qC \tQuerying the current thread\n"
2188 " qfThreadInfo\tThread listing\n"
2189 " Tthread \tPassing the thread specifier in the T stop reply packet\n"
2190 " threads \tAll of the above\n");
2194 #undef require_running
2195 #define require_running(BUF) \
2196 if (!target_running ()) \
2203 first_thread_of (struct inferior_list_entry
*entry
, void *args
)
2205 int pid
= * (int *) args
;
2207 if (ptid_get_pid (entry
->id
) == pid
)
2214 kill_inferior_callback (struct inferior_list_entry
*entry
)
2216 struct process_info
*process
= (struct process_info
*) entry
;
2217 int pid
= ptid_get_pid (process
->head
.id
);
2219 kill_inferior (pid
);
2220 discard_queued_stop_replies (pid
);
2223 /* Callback for for_each_inferior to detach or kill the inferior,
2224 depending on whether we attached to it or not.
2225 We inform the user whether we're detaching or killing the process
2226 as this is only called when gdbserver is about to exit. */
2229 detach_or_kill_inferior_callback (struct inferior_list_entry
*entry
)
2231 struct process_info
*process
= (struct process_info
*) entry
;
2232 int pid
= ptid_get_pid (process
->head
.id
);
2234 if (process
->attached
)
2235 detach_inferior (pid
);
2237 kill_inferior (pid
);
2239 discard_queued_stop_replies (pid
);
2242 /* for_each_inferior callback for detach_or_kill_for_exit to print
2243 the pids of started inferiors. */
2246 print_started_pid (struct inferior_list_entry
*entry
)
2248 struct process_info
*process
= (struct process_info
*) entry
;
2250 if (! process
->attached
)
2252 int pid
= ptid_get_pid (process
->head
.id
);
2253 fprintf (stderr
, " %d", pid
);
2257 /* for_each_inferior callback for detach_or_kill_for_exit to print
2258 the pids of attached inferiors. */
2261 print_attached_pid (struct inferior_list_entry
*entry
)
2263 struct process_info
*process
= (struct process_info
*) entry
;
2265 if (process
->attached
)
2267 int pid
= ptid_get_pid (process
->head
.id
);
2268 fprintf (stderr
, " %d", pid
);
2272 /* Call this when exiting gdbserver with possible inferiors that need
2273 to be killed or detached from. */
2276 detach_or_kill_for_exit (void)
2278 /* First print a list of the inferiors we will be killing/detaching.
2279 This is to assist the user, for example, in case the inferior unexpectedly
2280 dies after we exit: did we screw up or did the inferior exit on its own?
2281 Having this info will save some head-scratching. */
2283 if (have_started_inferiors_p ())
2285 fprintf (stderr
, "Killing process(es):");
2286 for_each_inferior (&all_processes
, print_started_pid
);
2287 fprintf (stderr
, "\n");
2289 if (have_attached_inferiors_p ())
2291 fprintf (stderr
, "Detaching process(es):");
2292 for_each_inferior (&all_processes
, print_attached_pid
);
2293 fprintf (stderr
, "\n");
2296 /* Now we can kill or detach the inferiors. */
2298 for_each_inferior (&all_processes
, detach_or_kill_inferior_callback
);
2302 join_inferiors_callback (struct inferior_list_entry
*entry
)
2304 struct process_info
*process
= (struct process_info
*) entry
;
2306 /* If we are attached, then we can exit. Otherwise, we need to hang
2307 around doing nothing, until the child is gone. */
2308 if (!process
->attached
)
2309 join_inferior (ptid_get_pid (process
->head
.id
));
2313 main (int argc
, char *argv
[])
2317 char *arg_end
, *port
;
2318 char **next_arg
= &argv
[1];
2323 while (*next_arg
!= NULL
&& **next_arg
== '-')
2325 if (strcmp (*next_arg
, "--version") == 0)
2327 gdbserver_version ();
2330 else if (strcmp (*next_arg
, "--help") == 0)
2332 gdbserver_usage (stdout
);
2335 else if (strcmp (*next_arg
, "--attach") == 0)
2337 else if (strcmp (*next_arg
, "--multi") == 0)
2339 else if (strcmp (*next_arg
, "--wrapper") == 0)
2343 wrapper_argv
= next_arg
;
2344 while (*next_arg
!= NULL
&& strcmp (*next_arg
, "--") != 0)
2347 if (next_arg
== wrapper_argv
|| *next_arg
== NULL
)
2349 gdbserver_usage (stderr
);
2353 /* Consume the "--". */
2356 else if (strcmp (*next_arg
, "--debug") == 0)
2358 else if (strcmp (*next_arg
, "--remote-debug") == 0)
2360 else if (strcmp (*next_arg
, "--disable-packet") == 0)
2362 gdbserver_show_disableable (stdout
);
2365 else if (strncmp (*next_arg
,
2366 "--disable-packet=",
2367 sizeof ("--disable-packet=") - 1) == 0)
2369 char *packets
, *tok
;
2371 packets
= *next_arg
+= sizeof ("--disable-packet=") - 1;
2372 for (tok
= strtok (packets
, ",");
2374 tok
= strtok (NULL
, ","))
2376 if (strcmp ("vCont", tok
) == 0)
2377 disable_packet_vCont
= 1;
2378 else if (strcmp ("Tthread", tok
) == 0)
2379 disable_packet_Tthread
= 1;
2380 else if (strcmp ("qC", tok
) == 0)
2381 disable_packet_qC
= 1;
2382 else if (strcmp ("qfThreadInfo", tok
) == 0)
2383 disable_packet_qfThreadInfo
= 1;
2384 else if (strcmp ("threads", tok
) == 0)
2386 disable_packet_vCont
= 1;
2387 disable_packet_Tthread
= 1;
2388 disable_packet_qC
= 1;
2389 disable_packet_qfThreadInfo
= 1;
2393 fprintf (stderr
, "Don't know how to disable \"%s\".\n\n",
2395 gdbserver_show_disableable (stderr
);
2402 fprintf (stderr
, "Unknown argument: %s\n", *next_arg
);
2410 if (setjmp (toplevel
))
2412 fprintf (stderr
, "Exiting\n");
2418 if (port
== NULL
|| (!attach
&& !multi_mode
&& *next_arg
== NULL
))
2420 gdbserver_usage (stderr
);
2427 /* --attach used to come after PORT, so allow it there for
2429 if (*next_arg
!= NULL
&& strcmp (*next_arg
, "--attach") == 0)
2436 && (*next_arg
== NULL
2437 || (*next_arg
)[0] == '\0'
2438 || (pid
= strtoul (*next_arg
, &arg_end
, 0)) == 0
2440 || next_arg
[1] != NULL
))
2445 gdbserver_usage (stderr
);
2449 initialize_inferiors ();
2450 initialize_async_io ();
2452 if (target_supports_tracepoints ())
2453 initialize_tracepoint ();
2455 own_buf
= xmalloc (PBUFSIZ
+ 1);
2456 mem_buf
= xmalloc (PBUFSIZ
);
2458 if (pid
== 0 && *next_arg
!= NULL
)
2462 n
= argc
- (next_arg
- argv
);
2463 program_argv
= xmalloc (sizeof (char *) * (n
+ 1));
2464 for (i
= 0; i
< n
; i
++)
2465 program_argv
[i
] = xstrdup (next_arg
[i
]);
2466 program_argv
[i
] = NULL
;
2468 /* Wait till we are at first instruction in program. */
2469 start_inferior (program_argv
);
2471 /* We are now (hopefully) stopped at the first instruction of
2472 the target process. This assumes that the target process was
2473 successfully created. */
2477 if (attach_inferior (pid
) == -1)
2478 error ("Attaching not supported on this target");
2480 /* Otherwise succeeded. */
2484 last_status
.kind
= TARGET_WAITKIND_EXITED
;
2485 last_status
.value
.integer
= 0;
2486 last_ptid
= minus_one_ptid
;
2489 /* Don't report shared library events on the initial connection,
2490 even if some libraries are preloaded. Avoids the "stopped by
2491 shared library event" notice on gdb side. */
2494 if (setjmp (toplevel
))
2496 detach_or_kill_for_exit ();
2500 if (last_status
.kind
== TARGET_WAITKIND_EXITED
2501 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2506 if (!was_running
&& !multi_mode
)
2508 fprintf (stderr
, "No program to debug. GDBserver exiting.\n");
2516 /* Be sure we're out of tfind mode. */
2517 current_traceframe
= -1;
2521 if (setjmp (toplevel
) != 0)
2523 /* An error occurred. */
2524 if (response_needed
)
2526 write_enn (own_buf
);
2531 /* Wait for events. This will return when all event sources are
2532 removed from the event loop. */
2533 start_event_loop ();
2535 /* If an exit was requested (using the "monitor exit" command),
2536 terminate now. The only other way to get here is for
2537 getpkt to fail; close the connection and reopen it at the
2542 detach_or_kill_for_exit ();
2547 "Remote side has terminated connection. "
2548 "GDBserver will reopen the connection.\n");
2552 if (disconnected_tracing
)
2554 /* Try to enable non-stop/async mode, so we we can both
2555 wait for an async socket accept, and handle async
2556 target events simultaneously. There's also no point
2557 either in having the target always stop all threads,
2558 when we're going to pass signals down without
2562 if (start_non_stop (1))
2565 /* Detaching implicitly resumes all threads; simply
2566 disconnecting does not. */
2572 "Disconnected tracing disabled; stopping trace run.\n");
2579 /* Event loop callback that handles a serial event. The first byte in
2580 the serial buffer gets us here. We expect characters to arrive at
2581 a brisk pace, so we read the rest of the packet with a blocking
2585 process_serial_event (void)
2595 int new_packet_len
= -1;
2597 /* Used to decide when gdbserver should exit in
2598 multi-mode/remote. */
2599 static int have_ran
= 0;
2602 have_ran
= target_running ();
2604 disable_async_io ();
2606 response_needed
= 0;
2607 packet_len
= getpkt (own_buf
);
2608 if (packet_len
<= 0)
2611 /* Force an event loop break. */
2614 response_needed
= 1;
2621 handle_query (own_buf
, packet_len
, &new_packet_len
);
2624 handle_general_set (own_buf
);
2627 require_running (own_buf
);
2632 pid
= strtol (&own_buf
[i
], NULL
, 16);
2636 ptid_get_pid (((struct inferior_list_entry
*) current_inferior
)->id
);
2638 if (tracing
&& disconnected_tracing
)
2640 struct thread_resume resume_info
;
2641 struct process_info
*process
= find_process_pid (pid
);
2643 if (process
== NULL
)
2645 write_enn (own_buf
);
2650 "Disconnected tracing in effect, "
2651 "leaving gdbserver attached to the process\n");
2653 /* Make sure we're in non-stop/async mode, so we we can both
2654 wait for an async socket accept, and handle async target
2655 events simultaneously. There's also no point either in
2656 having the target stop all threads, when we're going to
2657 pass signals down without informing GDB. */
2661 fprintf (stderr
, "Forcing non-stop mode\n");
2667 process
->gdb_detached
= 1;
2669 /* Detaching implicitly resumes all threads. */
2670 resume_info
.thread
= minus_one_ptid
;
2671 resume_info
.kind
= resume_continue
;
2672 resume_info
.sig
= 0;
2673 (*the_target
->resume
) (&resume_info
, 1);
2676 break; /* from switch/case */
2679 fprintf (stderr
, "Detaching from process %d\n", pid
);
2681 if (detach_inferior (pid
) != 0)
2682 write_enn (own_buf
);
2685 discard_queued_stop_replies (pid
);
2688 if (extended_protocol
)
2690 /* Treat this like a normal program exit. */
2691 last_status
.kind
= TARGET_WAITKIND_EXITED
;
2692 last_status
.value
.integer
= 0;
2693 last_ptid
= pid_to_ptid (pid
);
2695 current_inferior
= NULL
;
2702 /* If we are attached, then we can exit. Otherwise, we
2703 need to hang around doing nothing, until the child is
2705 for_each_inferior (&all_processes
,
2706 join_inferiors_callback
);
2712 extended_protocol
= 1;
2716 handle_status (own_buf
);
2719 if (own_buf
[1] == 'c' || own_buf
[1] == 'g' || own_buf
[1] == 's')
2721 ptid_t gdb_id
, thread_id
;
2724 require_running (own_buf
);
2726 gdb_id
= read_ptid (&own_buf
[2], NULL
);
2728 pid
= ptid_get_pid (gdb_id
);
2730 if (ptid_equal (gdb_id
, null_ptid
)
2731 || ptid_equal (gdb_id
, minus_one_ptid
))
2732 thread_id
= null_ptid
;
2734 && ptid_equal (pid_to_ptid (pid
),
2737 struct thread_info
*thread
=
2738 (struct thread_info
*) find_inferior (&all_threads
,
2743 write_enn (own_buf
);
2747 thread_id
= ((struct inferior_list_entry
*)thread
)->id
;
2751 thread_id
= gdb_id_to_thread_id (gdb_id
);
2752 if (ptid_equal (thread_id
, null_ptid
))
2754 write_enn (own_buf
);
2759 if (own_buf
[1] == 'g')
2761 if (ptid_equal (thread_id
, null_ptid
))
2763 /* GDB is telling us to choose any thread. Check if
2764 the currently selected thread is still valid. If
2765 it is not, select the first available. */
2766 struct thread_info
*thread
=
2767 (struct thread_info
*) find_inferior_id (&all_threads
,
2770 thread_id
= all_threads
.head
->id
;
2773 general_thread
= thread_id
;
2774 set_desired_inferior (1);
2776 else if (own_buf
[1] == 'c')
2777 cont_thread
= thread_id
;
2778 else if (own_buf
[1] == 's')
2779 step_thread
= thread_id
;
2785 /* Silently ignore it so that gdb can extend the protocol
2786 without compatibility headaches. */
2791 require_running (own_buf
);
2792 if (current_traceframe
>= 0)
2794 struct regcache
*regcache
= new_register_cache ();
2796 if (fetch_traceframe_registers (current_traceframe
,
2798 registers_to_string (regcache
, own_buf
);
2800 write_enn (own_buf
);
2801 free_register_cache (regcache
);
2805 struct regcache
*regcache
;
2807 set_desired_inferior (1);
2808 regcache
= get_thread_regcache (current_inferior
, 1);
2809 registers_to_string (regcache
, own_buf
);
2813 require_running (own_buf
);
2814 if (current_traceframe
>= 0)
2815 write_enn (own_buf
);
2818 struct regcache
*regcache
;
2820 set_desired_inferior (1);
2821 regcache
= get_thread_regcache (current_inferior
, 1);
2822 registers_from_string (regcache
, &own_buf
[1]);
2827 require_running (own_buf
);
2828 decode_m_packet (&own_buf
[1], &mem_addr
, &len
);
2829 if (read_memory (mem_addr
, mem_buf
, len
) == 0)
2830 convert_int_to_ascii (mem_buf
, own_buf
, len
);
2832 write_enn (own_buf
);
2835 require_running (own_buf
);
2836 decode_M_packet (&own_buf
[1], &mem_addr
, &len
, &mem_buf
);
2837 if (write_memory (mem_addr
, mem_buf
, len
) == 0)
2840 write_enn (own_buf
);
2843 require_running (own_buf
);
2844 if (decode_X_packet (&own_buf
[1], packet_len
- 1,
2845 &mem_addr
, &len
, &mem_buf
) < 0
2846 || write_memory (mem_addr
, mem_buf
, len
) != 0)
2847 write_enn (own_buf
);
2852 require_running (own_buf
);
2853 convert_ascii_to_int (own_buf
+ 1, &sig
, 1);
2854 if (target_signal_to_host_p (sig
))
2855 signal
= target_signal_to_host (sig
);
2858 myresume (own_buf
, 0, signal
);
2861 require_running (own_buf
);
2862 convert_ascii_to_int (own_buf
+ 1, &sig
, 1);
2863 if (target_signal_to_host_p (sig
))
2864 signal
= target_signal_to_host (sig
);
2867 myresume (own_buf
, 1, signal
);
2870 require_running (own_buf
);
2872 myresume (own_buf
, 0, signal
);
2875 require_running (own_buf
);
2877 myresume (own_buf
, 1, signal
);
2879 case 'Z': /* insert_ ... */
2881 case 'z': /* remove_ ... */
2885 CORE_ADDR addr
= strtoul (&own_buf
[3], &lenptr
, 16);
2886 int len
= strtol (lenptr
+ 1, &dataptr
, 16);
2887 char type
= own_buf
[1];
2889 const int insert
= ch
== 'Z';
2891 /* Default to unrecognized/unsupported. */
2895 case '0': /* software-breakpoint */
2896 case '1': /* hardware-breakpoint */
2897 case '2': /* write watchpoint */
2898 case '3': /* read watchpoint */
2899 case '4': /* access watchpoint */
2900 require_running (own_buf
);
2901 if (insert
&& the_target
->insert_point
!= NULL
)
2902 res
= (*the_target
->insert_point
) (type
, addr
, len
);
2903 else if (!insert
&& the_target
->remove_point
!= NULL
)
2904 res
= (*the_target
->remove_point
) (type
, addr
, len
);
2916 write_enn (own_buf
);
2920 response_needed
= 0;
2921 if (!target_running ())
2922 /* The packet we received doesn't make sense - but we can't
2923 reply to it, either. */
2926 fprintf (stderr
, "Killing all inferiors\n");
2927 for_each_inferior (&all_processes
, kill_inferior_callback
);
2929 /* When using the extended protocol, we wait with no program
2930 running. The traditional protocol will exit instead. */
2931 if (extended_protocol
)
2933 last_status
.kind
= TARGET_WAITKIND_EXITED
;
2934 last_status
.value
.sig
= TARGET_SIGNAL_KILL
;
2942 ptid_t gdb_id
, thread_id
;
2944 require_running (own_buf
);
2946 gdb_id
= read_ptid (&own_buf
[1], NULL
);
2947 thread_id
= gdb_id_to_thread_id (gdb_id
);
2948 if (ptid_equal (thread_id
, null_ptid
))
2950 write_enn (own_buf
);
2954 if (mythread_alive (thread_id
))
2957 write_enn (own_buf
);
2961 response_needed
= 0;
2963 /* Restarting the inferior is only supported in the extended
2965 if (extended_protocol
)
2967 if (target_running ())
2968 for_each_inferior (&all_processes
,
2969 kill_inferior_callback
);
2970 fprintf (stderr
, "GDBserver restarting\n");
2972 /* Wait till we are at 1st instruction in prog. */
2973 if (program_argv
!= NULL
)
2974 start_inferior (program_argv
);
2977 last_status
.kind
= TARGET_WAITKIND_EXITED
;
2978 last_status
.value
.sig
= TARGET_SIGNAL_KILL
;
2984 /* It is a request we don't understand. Respond with an
2985 empty packet so that gdb knows that we don't support this
2991 /* Extended (long) request. */
2992 handle_v_requests (own_buf
, packet_len
, &new_packet_len
);
2996 /* It is a request we don't understand. Respond with an empty
2997 packet so that gdb knows that we don't support this
3003 if (new_packet_len
!= -1)
3004 putpkt_binary (own_buf
, new_packet_len
);
3008 response_needed
= 0;
3010 if (!extended_protocol
&& have_ran
&& !target_running ())
3012 /* In non-stop, defer exiting until GDB had a chance to query
3013 the whole vStopped list (until it gets an OK). */
3016 fprintf (stderr
, "GDBserver exiting\n");
3028 /* Event-loop callback for serial events. */
3031 handle_serial_event (int err
, gdb_client_data client_data
)
3034 fprintf (stderr
, "handling possible serial event\n");
3036 /* Really handle it. */
3037 if (process_serial_event () < 0)
3040 /* Be sure to not change the selected inferior behind GDB's back.
3041 Important in the non-stop mode asynchronous protocol. */
3042 set_desired_inferior (1);
3047 /* Event-loop callback for target events. */
3050 handle_target_event (int err
, gdb_client_data client_data
)
3053 fprintf (stderr
, "handling possible target event\n");
3055 last_ptid
= mywait (minus_one_ptid
, &last_status
,
3058 if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
)
3060 int pid
= ptid_get_pid (last_ptid
);
3061 struct process_info
*process
= find_process_pid (pid
);
3062 int forward_event
= !gdb_connected () || process
->gdb_detached
;
3064 if (last_status
.kind
== TARGET_WAITKIND_EXITED
3065 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
3067 mark_breakpoints_out (process
);
3068 mourn_inferior (process
);
3073 if (!target_running ())
3075 /* The last process exited. We're done. */
3079 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
3081 /* A thread stopped with a signal, but gdb isn't
3082 connected to handle it. Pass it down to the
3083 inferior, as if it wasn't being traced. */
3084 struct thread_resume resume_info
;
3088 "GDB not connected; forwarding event %d for [%s]\n",
3089 (int) last_status
.kind
,
3090 target_pid_to_str (last_ptid
));
3092 resume_info
.thread
= last_ptid
;
3093 resume_info
.kind
= resume_continue
;
3094 resume_info
.sig
= last_status
.value
.sig
;
3095 (*the_target
->resume
) (&resume_info
, 1);
3097 else if (debug_threads
)
3098 fprintf (stderr
, "GDB not connected; ignoring event %d for [%s]\n",
3099 (int) last_status
.kind
,
3100 target_pid_to_str (last_ptid
));
3104 /* Something interesting. Tell GDB about it. */
3105 push_event (last_ptid
, &last_status
);
3109 /* Be sure to not change the selected inferior behind GDB's back.
3110 Important in the non-stop mode asynchronous protocol. */
3111 set_desired_inferior (1);