1 /* Main code for remote server for GDB.
2 Copyright (C) 1989-2018 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "gdbthread.h"
25 #include "signals-state-save-restore.h"
33 #include "btrace-common.h"
34 #include "filestuff.h"
35 #include "tracepoint.h"
39 #include "common-inferior.h"
40 #include "job-control.h"
43 #include "common/selftest.h"
45 #define require_running_or_return(BUF) \
46 if (!target_running ()) \
52 #define require_running_or_break(BUF) \
53 if (!target_running ()) \
59 /* The environment to pass to the inferior when creating it. */
61 static gdb_environ our_environ
;
63 /* Start the inferior using a shell. */
65 /* We always try to start the inferior using a shell. */
67 int startup_with_shell
= 1;
69 /* The thread set with an `Hc' packet. `Hc' is deprecated in favor of
70 `vCont'. Note the multi-process extensions made `vCont' a
71 requirement, so `Hc pPID.TID' is pretty much undefined. So
72 CONT_THREAD can be null_ptid for no `Hc' thread, minus_one_ptid for
73 resuming all threads of the process (again, `Hc' isn't used for
74 multi-process), or a specific thread ptid_t. */
77 /* The thread set with an `Hg' packet. */
78 ptid_t general_thread
;
82 static int extended_protocol
;
83 static int response_needed
;
84 static int exit_requested
;
86 /* --once: Exit after the first connection has closed. */
90 int report_fork_events
;
91 int report_vfork_events
;
92 int report_exec_events
;
93 int report_thread_events
;
95 /* Whether to report TARGET_WAITKING_NO_RESUMED events. */
96 static int report_no_resumed
;
102 /* True if the "vContSupported" feature is active. In that case, GDB
103 wants us to report whether single step is supported in the reply to
105 static int vCont_supported
;
107 /* Whether we should attempt to disable the operating system's address
108 space randomization feature before starting an inferior. */
109 int disable_randomization
= 1;
111 static char *program_name
= NULL
;
112 static std::vector
<char *> program_args
;
113 static std::string wrapper_argv
;
115 int pass_signals
[GDB_SIGNAL_LAST
];
116 int program_signals
[GDB_SIGNAL_LAST
];
117 int program_signals_p
;
119 /* The PID of the originally created or attached inferior. Used to
120 send signals to the process when GDB sends us an asynchronous interrupt
121 (user hitting Control-C in the client), and to wait for the child to exit
122 when no longer debugging it. */
124 unsigned long signal_pid
;
126 /* Set if you want to disable optional thread related packets support
127 in gdbserver, for the sake of testing GDB against stubs that don't
129 int disable_packet_vCont
;
130 int disable_packet_Tthread
;
131 int disable_packet_qC
;
132 int disable_packet_qfThreadInfo
;
134 /* Last status reported to GDB. */
135 struct target_waitstatus last_status
;
139 static unsigned char *mem_buf
;
141 /* A sub-class of 'struct notif_event' for stop, holding information
142 relative to a single stop reply. We keep a queue of these to
143 push to GDB in non-stop mode. */
147 struct notif_event base
;
149 /* Thread or process that got the event. */
153 struct target_waitstatus status
;
156 /* The current btrace configuration. This is gdbserver's mirror of GDB's
157 btrace configuration. */
158 static struct btrace_config current_btrace_conf
;
160 DEFINE_QUEUE_P (notif_event_p
);
162 /* Put a stop reply to the stop reply queue. */
165 queue_stop_reply (ptid_t ptid
, struct target_waitstatus
*status
)
167 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
169 new_notif
->ptid
= ptid
;
170 new_notif
->status
= *status
;
172 notif_event_enque (¬if_stop
, (struct notif_event
*) new_notif
);
176 remove_all_on_match_ptid (QUEUE (notif_event_p
) *q
,
177 QUEUE_ITER (notif_event_p
) *iter
,
178 struct notif_event
*event
,
181 ptid_t filter_ptid
= *(ptid_t
*) data
;
182 struct vstop_notif
*vstop_event
= (struct vstop_notif
*) event
;
184 if (ptid_match (vstop_event
->ptid
, filter_ptid
))
186 if (q
->free_func
!= NULL
)
187 q
->free_func (event
);
189 QUEUE_remove_elem (notif_event_p
, q
, iter
);
198 discard_queued_stop_replies (ptid_t ptid
)
200 QUEUE_iterate (notif_event_p
, notif_stop
.queue
,
201 remove_all_on_match_ptid
, &ptid
);
205 vstop_notif_reply (struct notif_event
*event
, char *own_buf
)
207 struct vstop_notif
*vstop
= (struct vstop_notif
*) event
;
209 prepare_resume_reply (own_buf
, vstop
->ptid
, &vstop
->status
);
212 /* QUEUE_iterate callback helper for in_queued_stop_replies. */
215 in_queued_stop_replies_ptid (QUEUE (notif_event_p
) *q
,
216 QUEUE_ITER (notif_event_p
) *iter
,
217 struct notif_event
*event
,
220 ptid_t filter_ptid
= *(ptid_t
*) data
;
221 struct vstop_notif
*vstop_event
= (struct vstop_notif
*) event
;
223 if (ptid_match (vstop_event
->ptid
, filter_ptid
))
226 /* Don't resume fork children that GDB does not know about yet. */
227 if ((vstop_event
->status
.kind
== TARGET_WAITKIND_FORKED
228 || vstop_event
->status
.kind
== TARGET_WAITKIND_VFORKED
)
229 && ptid_match (vstop_event
->status
.value
.related_pid
, filter_ptid
))
238 in_queued_stop_replies (ptid_t ptid
)
240 return !QUEUE_iterate (notif_event_p
, notif_stop
.queue
,
241 in_queued_stop_replies_ptid
, &ptid
);
244 struct notif_server notif_stop
=
246 "vStopped", "Stop", NULL
, vstop_notif_reply
,
250 target_running (void)
252 return get_first_thread () != NULL
;
255 /* See common/common-inferior.h. */
260 return !wrapper_argv
.empty () ? wrapper_argv
.c_str () : NULL
;
263 /* See common/common-inferior.h. */
266 get_exec_file (int err
)
268 if (err
&& program_name
== NULL
)
269 error (_("No executable file specified."));
283 attach_inferior (int pid
)
285 /* myattach should return -1 if attaching is unsupported,
286 0 if it succeeded, and call error() otherwise. */
288 if (myattach (pid
) != 0)
291 fprintf (stderr
, "Attached; pid = %d\n", pid
);
294 /* FIXME - It may be that we should get the SIGNAL_PID from the
295 attach function, so that it can be the main thread instead of
296 whichever we were told to attach to. */
301 last_ptid
= mywait (pid_to_ptid (pid
), &last_status
, 0, 0);
303 /* GDB knows to ignore the first SIGSTOP after attaching to a running
304 process using the "attach" command, but this is different; it's
305 just using "target remote". Pretend it's just starting up. */
306 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
307 && last_status
.value
.sig
== GDB_SIGNAL_STOP
)
308 last_status
.value
.sig
= GDB_SIGNAL_TRAP
;
310 current_thread
->last_resume_kind
= resume_stop
;
311 current_thread
->last_status
= last_status
;
317 extern int remote_debug
;
319 /* Decode a qXfer read request. Return 0 if everything looks OK,
323 decode_xfer_read (char *buf
, CORE_ADDR
*ofs
, unsigned int *len
)
325 /* After the read marker and annex, qXfer looks like a
326 traditional 'm' packet. */
327 decode_m_packet (buf
, ofs
, len
);
333 decode_xfer (char *buf
, char **object
, char **rw
, char **annex
, char **offset
)
335 /* Extract and NUL-terminate the object. */
337 while (*buf
&& *buf
!= ':')
343 /* Extract and NUL-terminate the read/write action. */
345 while (*buf
&& *buf
!= ':')
351 /* Extract and NUL-terminate the annex. */
353 while (*buf
&& *buf
!= ':')
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 gdb_byte
*data
, int len
, int is_more
)
377 return remote_escape_output (data
, len
, 1, (unsigned char *) buf
+ 1,
378 &out_len
, PBUFSIZ
- 2) + 1;
381 /* Handle btrace enabling in BTS format. */
384 handle_btrace_enable_bts (struct thread_info
*thread
)
386 if (thread
->btrace
!= NULL
)
387 error (_("Btrace already enabled."));
389 current_btrace_conf
.format
= BTRACE_FORMAT_BTS
;
390 thread
->btrace
= target_enable_btrace (thread
->id
, ¤t_btrace_conf
);
393 /* Handle btrace enabling in Intel Processor Trace format. */
396 handle_btrace_enable_pt (struct thread_info
*thread
)
398 if (thread
->btrace
!= NULL
)
399 error (_("Btrace already enabled."));
401 current_btrace_conf
.format
= BTRACE_FORMAT_PT
;
402 thread
->btrace
= target_enable_btrace (thread
->id
, ¤t_btrace_conf
);
405 /* Handle btrace disabling. */
408 handle_btrace_disable (struct thread_info
*thread
)
411 if (thread
->btrace
== NULL
)
412 error (_("Branch tracing not enabled."));
414 if (target_disable_btrace (thread
->btrace
) != 0)
415 error (_("Could not disable branch tracing."));
417 thread
->btrace
= NULL
;
420 /* Handle the "Qbtrace" packet. */
423 handle_btrace_general_set (char *own_buf
)
425 struct thread_info
*thread
;
428 if (!startswith (own_buf
, "Qbtrace:"))
431 op
= own_buf
+ strlen ("Qbtrace:");
433 if (ptid_equal (general_thread
, null_ptid
)
434 || ptid_equal (general_thread
, minus_one_ptid
))
436 strcpy (own_buf
, "E.Must select a single thread.");
440 thread
= find_thread_ptid (general_thread
);
443 strcpy (own_buf
, "E.No such thread.");
449 if (strcmp (op
, "bts") == 0)
450 handle_btrace_enable_bts (thread
);
451 else if (strcmp (op
, "pt") == 0)
452 handle_btrace_enable_pt (thread
);
453 else if (strcmp (op
, "off") == 0)
454 handle_btrace_disable (thread
);
456 error (_("Bad Qbtrace operation. Use bts, pt, or off."));
460 CATCH (exception
, RETURN_MASK_ERROR
)
462 sprintf (own_buf
, "E.%s", exception
.message
);
469 /* Handle the "Qbtrace-conf" packet. */
472 handle_btrace_conf_general_set (char *own_buf
)
474 struct thread_info
*thread
;
477 if (!startswith (own_buf
, "Qbtrace-conf:"))
480 op
= own_buf
+ strlen ("Qbtrace-conf:");
482 if (ptid_equal (general_thread
, null_ptid
)
483 || ptid_equal (general_thread
, minus_one_ptid
))
485 strcpy (own_buf
, "E.Must select a single thread.");
489 thread
= find_thread_ptid (general_thread
);
492 strcpy (own_buf
, "E.No such thread.");
496 if (startswith (op
, "bts:size="))
502 size
= strtoul (op
+ strlen ("bts:size="), &endp
, 16);
503 if (endp
== NULL
|| *endp
!= 0 || errno
!= 0 || size
> UINT_MAX
)
505 strcpy (own_buf
, "E.Bad size value.");
509 current_btrace_conf
.bts
.size
= (unsigned int) size
;
511 else if (strncmp (op
, "pt:size=", strlen ("pt:size=")) == 0)
517 size
= strtoul (op
+ strlen ("pt:size="), &endp
, 16);
518 if (endp
== NULL
|| *endp
!= 0 || errno
!= 0 || size
> UINT_MAX
)
520 strcpy (own_buf
, "E.Bad size value.");
524 current_btrace_conf
.pt
.size
= (unsigned int) size
;
528 strcpy (own_buf
, "E.Bad Qbtrace configuration option.");
536 /* Handle all of the extended 'Q' packets. */
539 handle_general_set (char *own_buf
)
541 if (startswith (own_buf
, "QPassSignals:"))
543 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
544 const char *p
= own_buf
+ strlen ("QPassSignals:");
547 p
= decode_address_to_semicolon (&cursig
, p
);
548 for (i
= 0; i
< numsigs
; i
++)
554 /* Keep looping, to clear the remaining signals. */
557 p
= decode_address_to_semicolon (&cursig
, p
);
562 strcpy (own_buf
, "OK");
566 if (startswith (own_buf
, "QProgramSignals:"))
568 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
569 const char *p
= own_buf
+ strlen ("QProgramSignals:");
572 program_signals_p
= 1;
574 p
= decode_address_to_semicolon (&cursig
, p
);
575 for (i
= 0; i
< numsigs
; i
++)
579 program_signals
[i
] = 1;
581 /* Keep looping, to clear the remaining signals. */
584 p
= decode_address_to_semicolon (&cursig
, p
);
587 program_signals
[i
] = 0;
589 strcpy (own_buf
, "OK");
593 if (startswith (own_buf
, "QCatchSyscalls:"))
595 const char *p
= own_buf
+ sizeof ("QCatchSyscalls:") - 1;
598 struct process_info
*process
;
600 if (!target_running () || !target_supports_catch_syscall ())
606 if (strcmp (p
, "0") == 0)
608 else if (p
[0] == '1' && (p
[1] == ';' || p
[1] == '\0'))
612 fprintf (stderr
, "Unknown catch-syscalls mode requested: %s\n",
618 process
= current_process ();
619 process
->syscalls_to_catch
.clear ();
629 p
= decode_address_to_semicolon (&sysno
, p
);
630 process
->syscalls_to_catch
.push_back (sysno
);
634 process
->syscalls_to_catch
.push_back (ANY_SYSCALL
);
641 if (strcmp (own_buf
, "QEnvironmentReset") == 0)
643 our_environ
= gdb_environ::from_host_environ ();
649 if (startswith (own_buf
, "QEnvironmentHexEncoded:"))
651 const char *p
= own_buf
+ sizeof ("QEnvironmentHexEncoded:") - 1;
652 /* The final form of the environment variable. FINAL_VAR will
653 hold the 'VAR=VALUE' format. */
654 std::string final_var
= hex2str (p
);
655 std::string var_name
, var_value
;
659 debug_printf (_("[QEnvironmentHexEncoded received '%s']\n"), p
);
660 debug_printf (_("[Environment variable to be set: '%s']\n"),
665 size_t pos
= final_var
.find ('=');
666 if (pos
== std::string::npos
)
668 warning (_("Unexpected format for environment variable: '%s'"),
674 var_name
= final_var
.substr (0, pos
);
675 var_value
= final_var
.substr (pos
+ 1, std::string::npos
);
677 our_environ
.set (var_name
.c_str (), var_value
.c_str ());
683 if (startswith (own_buf
, "QEnvironmentUnset:"))
685 const char *p
= own_buf
+ sizeof ("QEnvironmentUnset:") - 1;
686 std::string varname
= hex2str (p
);
690 debug_printf (_("[QEnvironmentUnset received '%s']\n"), p
);
691 debug_printf (_("[Environment variable to be unset: '%s']\n"),
696 our_environ
.unset (varname
.c_str ());
702 if (strcmp (own_buf
, "QStartNoAckMode") == 0)
706 debug_printf ("[noack mode enabled]\n");
715 if (startswith (own_buf
, "QNonStop:"))
717 char *mode
= own_buf
+ 9;
721 if (strcmp (mode
, "0") == 0)
723 else if (strcmp (mode
, "1") == 0)
727 /* We don't know what this mode is, so complain to
729 fprintf (stderr
, "Unknown non-stop mode requested: %s\n",
735 req_str
= req
? "non-stop" : "all-stop";
736 if (start_non_stop (req
) != 0)
738 fprintf (stderr
, "Setting %s mode failed\n", req_str
);
746 debug_printf ("[%s mode enabled]\n", req_str
);
752 if (startswith (own_buf
, "QDisableRandomization:"))
754 char *packet
= own_buf
+ strlen ("QDisableRandomization:");
757 unpack_varlen_hex (packet
, &setting
);
758 disable_randomization
= setting
;
762 debug_printf (disable_randomization
763 ? "[address space randomization disabled]\n"
764 : "[address space randomization enabled]\n");
771 if (target_supports_tracepoints ()
772 && handle_tracepoint_general_set (own_buf
))
775 if (startswith (own_buf
, "QAgent:"))
777 char *mode
= own_buf
+ strlen ("QAgent:");
780 if (strcmp (mode
, "0") == 0)
782 else if (strcmp (mode
, "1") == 0)
786 /* We don't know what this value is, so complain to GDB. */
787 sprintf (own_buf
, "E.Unknown QAgent value");
791 /* Update the flag. */
794 debug_printf ("[%s agent]\n", req
? "Enable" : "Disable");
799 if (handle_btrace_general_set (own_buf
))
802 if (handle_btrace_conf_general_set (own_buf
))
805 if (startswith (own_buf
, "QThreadEvents:"))
807 char *mode
= own_buf
+ strlen ("QThreadEvents:");
808 enum tribool req
= TRIBOOL_UNKNOWN
;
810 if (strcmp (mode
, "0") == 0)
812 else if (strcmp (mode
, "1") == 0)
816 char *mode_copy
= xstrdup (mode
);
818 /* We don't know what this mode is, so complain to GDB. */
819 sprintf (own_buf
, "E.Unknown thread-events mode requested: %s\n",
825 report_thread_events
= (req
== TRIBOOL_TRUE
);
829 const char *req_str
= report_thread_events
? "enabled" : "disabled";
831 debug_printf ("[thread events are now %s]\n", req_str
);
838 if (startswith (own_buf
, "QStartupWithShell:"))
840 const char *value
= own_buf
+ strlen ("QStartupWithShell:");
842 if (strcmp (value
, "1") == 0)
843 startup_with_shell
= true;
844 else if (strcmp (value
, "0") == 0)
845 startup_with_shell
= false;
849 fprintf (stderr
, "Unknown value to startup-with-shell: %s\n",
856 debug_printf (_("[Inferior will %s started with shell]"),
857 startup_with_shell
? "be" : "not be");
863 if (startswith (own_buf
, "QSetWorkingDir:"))
865 const char *p
= own_buf
+ strlen ("QSetWorkingDir:");
869 std::string path
= hex2str (p
);
871 set_inferior_cwd (path
.c_str ());
874 debug_printf (_("[Set the inferior's current directory to %s]\n"),
879 /* An empty argument means that we should clear out any
880 previously set cwd for the inferior. */
881 set_inferior_cwd (NULL
);
885 [Unset the inferior's current directory; will use gdbserver's cwd]\n"));
892 /* Otherwise we didn't know what packet it was. Say we didn't
898 get_features_xml (const char *annex
)
900 const struct target_desc
*desc
= current_target_desc ();
902 /* `desc->xmltarget' defines what to return when looking for the
903 "target.xml" file. Its contents can either be verbatim XML code
904 (prefixed with a '@') or else the name of the actual XML file to
905 be used in place of "target.xml".
907 This variable is set up from the auto-generated
908 init_registers_... routine for the current target. */
910 if (strcmp (annex
, "target.xml") == 0)
912 const char *ret
= tdesc_get_features_xml ((target_desc
*) desc
);
922 extern const char *const xml_builtin
[][2];
925 /* Look for the annex. */
926 for (i
= 0; xml_builtin
[i
][0] != NULL
; i
++)
927 if (strcmp (annex
, xml_builtin
[i
][0]) == 0)
930 if (xml_builtin
[i
][0] != NULL
)
931 return xml_builtin
[i
][1];
939 monitor_show_help (void)
941 monitor_output ("The following monitor commands are supported:\n");
942 monitor_output (" set debug <0|1>\n");
943 monitor_output (" Enable general debugging messages\n");
944 monitor_output (" set debug-hw-points <0|1>\n");
945 monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
946 monitor_output (" set remote-debug <0|1>\n");
947 monitor_output (" Enable remote protocol debugging messages\n");
948 monitor_output (" set debug-format option1[,option2,...]\n");
949 monitor_output (" Add additional information to debugging messages\n");
950 monitor_output (" Options: all, none");
951 monitor_output (", timestamp");
952 monitor_output ("\n");
953 monitor_output (" exit\n");
954 monitor_output (" Quit GDBserver\n");
957 /* Read trace frame or inferior memory. Returns the number of bytes
958 actually read, zero when no further transfer is possible, and -1 on
959 error. Return of a positive value smaller than LEN does not
960 indicate there's no more to be read, only the end of the transfer.
961 E.g., when GDB reads memory from a traceframe, a first request may
962 be served from a memory block that does not cover the whole request
963 length. A following request gets the rest served from either
964 another block (of the same traceframe) or from the read-only
968 gdb_read_memory (CORE_ADDR memaddr
, unsigned char *myaddr
, int len
)
972 if (current_traceframe
>= 0)
975 ULONGEST length
= len
;
977 if (traceframe_read_mem (current_traceframe
,
978 memaddr
, myaddr
, len
, &nbytes
))
980 /* Data read from trace buffer, we're done. */
983 if (!in_readonly_region (memaddr
, length
))
985 /* Otherwise we have a valid readonly case, fall through. */
986 /* (assume no half-trace half-real blocks for now) */
989 res
= prepare_to_access_memory ();
992 if (set_desired_thread ())
993 res
= read_inferior_memory (memaddr
, myaddr
, len
);
996 done_accessing_memory ();
998 return res
== 0 ? len
: -1;
1004 /* Write trace frame or inferior memory. Actually, writing to trace
1005 frames is forbidden. */
1008 gdb_write_memory (CORE_ADDR memaddr
, const unsigned char *myaddr
, int len
)
1010 if (current_traceframe
>= 0)
1016 ret
= prepare_to_access_memory ();
1019 if (set_desired_thread ())
1020 ret
= write_inferior_memory (memaddr
, myaddr
, len
);
1023 done_accessing_memory ();
1029 /* Subroutine of handle_search_memory to simplify it. */
1032 handle_search_memory_1 (CORE_ADDR start_addr
, CORE_ADDR search_space_len
,
1033 gdb_byte
*pattern
, unsigned pattern_len
,
1034 gdb_byte
*search_buf
,
1035 unsigned chunk_size
, unsigned search_buf_size
,
1036 CORE_ADDR
*found_addrp
)
1038 /* Prime the search buffer. */
1040 if (gdb_read_memory (start_addr
, search_buf
, search_buf_size
)
1043 warning ("Unable to access %ld bytes of target "
1044 "memory at 0x%lx, halting search.",
1045 (long) search_buf_size
, (long) start_addr
);
1049 /* Perform the search.
1051 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
1052 When we've scanned N bytes we copy the trailing bytes to the start and
1053 read in another N bytes. */
1055 while (search_space_len
>= pattern_len
)
1057 gdb_byte
*found_ptr
;
1058 unsigned nr_search_bytes
= (search_space_len
< search_buf_size
1062 found_ptr
= (gdb_byte
*) memmem (search_buf
, nr_search_bytes
, pattern
,
1065 if (found_ptr
!= NULL
)
1067 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
1068 *found_addrp
= found_addr
;
1072 /* Not found in this chunk, skip to next chunk. */
1074 /* Don't let search_space_len wrap here, it's unsigned. */
1075 if (search_space_len
>= chunk_size
)
1076 search_space_len
-= chunk_size
;
1078 search_space_len
= 0;
1080 if (search_space_len
>= pattern_len
)
1082 unsigned keep_len
= search_buf_size
- chunk_size
;
1083 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
1086 /* Copy the trailing part of the previous iteration to the front
1087 of the buffer for the next iteration. */
1088 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
1090 nr_to_read
= (search_space_len
- keep_len
< chunk_size
1091 ? search_space_len
- keep_len
1094 if (gdb_read_memory (read_addr
, search_buf
+ keep_len
,
1095 nr_to_read
) != search_buf_size
)
1097 warning ("Unable to access %ld bytes of target memory "
1098 "at 0x%lx, halting search.",
1099 (long) nr_to_read
, (long) read_addr
);
1103 start_addr
+= chunk_size
;
1112 /* Handle qSearch:memory packets. */
1115 handle_search_memory (char *own_buf
, int packet_len
)
1117 CORE_ADDR start_addr
;
1118 CORE_ADDR search_space_len
;
1120 unsigned int pattern_len
;
1121 /* NOTE: also defined in find.c testcase. */
1122 #define SEARCH_CHUNK_SIZE 16000
1123 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
1124 /* Buffer to hold memory contents for searching. */
1125 gdb_byte
*search_buf
;
1126 unsigned search_buf_size
;
1128 CORE_ADDR found_addr
;
1129 int cmd_name_len
= sizeof ("qSearch:memory:") - 1;
1131 pattern
= (gdb_byte
*) malloc (packet_len
);
1132 if (pattern
== NULL
)
1134 error ("Unable to allocate memory to perform the search");
1135 strcpy (own_buf
, "E00");
1138 if (decode_search_memory_packet (own_buf
+ cmd_name_len
,
1139 packet_len
- cmd_name_len
,
1140 &start_addr
, &search_space_len
,
1141 pattern
, &pattern_len
) < 0)
1144 error ("Error in parsing qSearch:memory packet");
1145 strcpy (own_buf
, "E00");
1149 search_buf_size
= chunk_size
+ pattern_len
- 1;
1151 /* No point in trying to allocate a buffer larger than the search space. */
1152 if (search_space_len
< search_buf_size
)
1153 search_buf_size
= search_space_len
;
1155 search_buf
= (gdb_byte
*) malloc (search_buf_size
);
1156 if (search_buf
== NULL
)
1159 error ("Unable to allocate memory to perform the search");
1160 strcpy (own_buf
, "E00");
1164 found
= handle_search_memory_1 (start_addr
, search_space_len
,
1165 pattern
, pattern_len
,
1166 search_buf
, chunk_size
, search_buf_size
,
1170 sprintf (own_buf
, "1,%lx", (long) found_addr
);
1171 else if (found
== 0)
1172 strcpy (own_buf
, "0");
1174 strcpy (own_buf
, "E00");
1180 /* Handle the "D" packet. */
1183 handle_detach (char *own_buf
)
1185 require_running_or_return (own_buf
);
1192 pid
= strtol (&own_buf
[2], NULL
, 16);
1195 pid
= ptid_get_pid (current_ptid
);
1197 if ((tracing
&& disconnected_tracing
) || any_persistent_commands ())
1199 struct process_info
*process
= find_process_pid (pid
);
1201 if (process
== NULL
)
1203 write_enn (own_buf
);
1207 if (tracing
&& disconnected_tracing
)
1209 "Disconnected tracing in effect, "
1210 "leaving gdbserver attached to the process\n");
1212 if (any_persistent_commands ())
1214 "Persistent commands are present, "
1215 "leaving gdbserver attached to the process\n");
1217 /* Make sure we're in non-stop/async mode, so we we can both
1218 wait for an async socket accept, and handle async target
1219 events simultaneously. There's also no point either in
1220 having the target stop all threads, when we're going to
1221 pass signals down without informing GDB. */
1225 debug_printf ("Forcing non-stop mode\n");
1231 process
->gdb_detached
= 1;
1233 /* Detaching implicitly resumes all threads. */
1234 target_continue_no_signal (minus_one_ptid
);
1240 fprintf (stderr
, "Detaching from process %d\n", pid
);
1242 if (detach_inferior (pid
) != 0)
1243 write_enn (own_buf
);
1246 discard_queued_stop_replies (pid_to_ptid (pid
));
1249 if (extended_protocol
|| target_running ())
1251 /* There is still at least one inferior remaining or
1252 we are in extended mode, so don't terminate gdbserver,
1253 and instead treat this like a normal program exit. */
1254 last_status
.kind
= TARGET_WAITKIND_EXITED
;
1255 last_status
.value
.integer
= 0;
1256 last_ptid
= pid_to_ptid (pid
);
1258 current_thread
= NULL
;
1265 /* If we are attached, then we can exit. Otherwise, we
1266 need to hang around doing nothing, until the child is
1268 join_inferior (pid
);
1274 /* Parse options to --debug-format= and "monitor set debug-format".
1275 ARG is the text after "--debug-format=" or "monitor set debug-format".
1276 IS_MONITOR is non-zero if we're invoked via "monitor set debug-format".
1277 This triggers calls to monitor_output.
1278 The result is NULL if all options were parsed ok, otherwise an error
1279 message which the caller must free.
1281 N.B. These commands affect all debug format settings, they are not
1282 cumulative. If a format is not specified, it is turned off.
1283 However, we don't go to extra trouble with things like
1284 "monitor set debug-format all,none,timestamp".
1285 Instead we just parse them one at a time, in order.
1287 The syntax for "monitor set debug" we support here is not identical
1288 to gdb's "set debug foo on|off" because we also use this function to
1289 parse "--debug-format=foo,bar". */
1292 parse_debug_format_options (const char *arg
, int is_monitor
)
1294 VEC (char_ptr
) *options
;
1298 /* First turn all debug format options off. */
1299 debug_timestamp
= 0;
1301 /* First remove leading spaces, for "monitor set debug-format". */
1302 while (isspace (*arg
))
1305 options
= delim_string_to_char_ptr_vec (arg
, ',');
1307 for (ix
= 0; VEC_iterate (char_ptr
, options
, ix
, option
); ++ix
)
1309 if (strcmp (option
, "all") == 0)
1311 debug_timestamp
= 1;
1313 monitor_output ("All extra debug format options enabled.\n");
1315 else if (strcmp (option
, "none") == 0)
1317 debug_timestamp
= 0;
1319 monitor_output ("All extra debug format options disabled.\n");
1321 else if (strcmp (option
, "timestamp") == 0)
1323 debug_timestamp
= 1;
1325 monitor_output ("Timestamps will be added to debug output.\n");
1327 else if (*option
== '\0')
1329 /* An empty option, e.g., "--debug-format=foo,,bar", is ignored. */
1335 = string_printf ("Unknown debug-format argument: \"%s\"\n", option
);
1337 free_char_ptr_vec (options
);
1342 free_char_ptr_vec (options
);
1343 return std::string ();
1346 /* Handle monitor commands not handled by target-specific handlers. */
1349 handle_monitor_command (char *mon
, char *own_buf
)
1351 if (strcmp (mon
, "set debug 1") == 0)
1354 monitor_output ("Debug output enabled.\n");
1356 else if (strcmp (mon
, "set debug 0") == 0)
1359 monitor_output ("Debug output disabled.\n");
1361 else if (strcmp (mon
, "set debug-hw-points 1") == 0)
1363 show_debug_regs
= 1;
1364 monitor_output ("H/W point debugging output enabled.\n");
1366 else if (strcmp (mon
, "set debug-hw-points 0") == 0)
1368 show_debug_regs
= 0;
1369 monitor_output ("H/W point debugging output disabled.\n");
1371 else if (strcmp (mon
, "set remote-debug 1") == 0)
1374 monitor_output ("Protocol debug output enabled.\n");
1376 else if (strcmp (mon
, "set remote-debug 0") == 0)
1379 monitor_output ("Protocol debug output disabled.\n");
1381 else if (startswith (mon
, "set debug-format "))
1383 std::string error_msg
1384 = parse_debug_format_options (mon
+ sizeof ("set debug-format ") - 1,
1387 if (!error_msg
.empty ())
1389 monitor_output (error_msg
.c_str ());
1390 monitor_show_help ();
1391 write_enn (own_buf
);
1394 else if (strcmp (mon
, "help") == 0)
1395 monitor_show_help ();
1396 else if (strcmp (mon
, "exit") == 0)
1400 monitor_output ("Unknown monitor command.\n\n");
1401 monitor_show_help ();
1402 write_enn (own_buf
);
1406 /* Associates a callback with each supported qXfer'able object. */
1410 /* The object this handler handles. */
1413 /* Request that the target transfer up to LEN 8-bit bytes of the
1414 target's OBJECT. The OFFSET, for a seekable object, specifies
1415 the starting point. The ANNEX can be used to provide additional
1416 data-specific information to the target.
1418 Return the number of bytes actually transfered, zero when no
1419 further transfer is possible, -1 on error, -2 when the transfer
1420 is not supported, and -3 on a verbose error message that should
1421 be preserved. Return of a positive value smaller than LEN does
1422 not indicate the end of the object, only the end of the transfer.
1424 One, and only one, of readbuf or writebuf must be non-NULL. */
1425 int (*xfer
) (const char *annex
,
1426 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1427 ULONGEST offset
, LONGEST len
);
1430 /* Handle qXfer:auxv:read. */
1433 handle_qxfer_auxv (const char *annex
,
1434 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1435 ULONGEST offset
, LONGEST len
)
1437 if (the_target
->read_auxv
== NULL
|| writebuf
!= NULL
)
1440 if (annex
[0] != '\0' || current_thread
== NULL
)
1443 return (*the_target
->read_auxv
) (offset
, readbuf
, len
);
1446 /* Handle qXfer:exec-file:read. */
1449 handle_qxfer_exec_file (const char *annex
,
1450 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1451 ULONGEST offset
, LONGEST len
)
1457 if (the_target
->pid_to_exec_file
== NULL
|| writebuf
!= NULL
)
1460 if (annex
[0] == '\0')
1462 if (current_thread
== NULL
)
1465 pid
= pid_of (current_thread
);
1469 annex
= unpack_varlen_hex (annex
, &pid
);
1470 if (annex
[0] != '\0')
1477 file
= (*the_target
->pid_to_exec_file
) (pid
);
1481 total_len
= strlen (file
);
1483 if (offset
> total_len
)
1486 if (offset
+ len
> total_len
)
1487 len
= total_len
- offset
;
1489 memcpy (readbuf
, file
+ offset
, len
);
1493 /* Handle qXfer:features:read. */
1496 handle_qxfer_features (const char *annex
,
1497 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1498 ULONGEST offset
, LONGEST len
)
1500 const char *document
;
1503 if (writebuf
!= NULL
)
1506 if (!target_running ())
1509 /* Grab the correct annex. */
1510 document
= get_features_xml (annex
);
1511 if (document
== NULL
)
1514 total_len
= strlen (document
);
1516 if (offset
> total_len
)
1519 if (offset
+ len
> total_len
)
1520 len
= total_len
- offset
;
1522 memcpy (readbuf
, document
+ offset
, len
);
1526 /* Handle qXfer:libraries:read. */
1529 handle_qxfer_libraries (const char *annex
,
1530 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1531 ULONGEST offset
, LONGEST len
)
1533 if (writebuf
!= NULL
)
1536 if (annex
[0] != '\0' || current_thread
== NULL
)
1539 std::string document
= "<library-list version=\"1.0\">\n";
1541 for (const dll_info
&dll
: all_dlls
)
1542 document
+= string_printf
1543 (" <library name=\"%s\"><segment address=\"0x%lx\"/></library>\n",
1544 dll
.name
.c_str (), (long) dll
.base_addr
);
1546 document
+= "</library-list>\n";
1548 if (offset
> document
.length ())
1551 if (offset
+ len
> document
.length ())
1552 len
= document
.length () - offset
;
1554 memcpy (readbuf
, &document
[offset
], len
);
1559 /* Handle qXfer:libraries-svr4:read. */
1562 handle_qxfer_libraries_svr4 (const char *annex
,
1563 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1564 ULONGEST offset
, LONGEST len
)
1566 if (writebuf
!= NULL
)
1569 if (current_thread
== NULL
|| the_target
->qxfer_libraries_svr4
== NULL
)
1572 return the_target
->qxfer_libraries_svr4 (annex
, readbuf
, writebuf
, offset
, len
);
1575 /* Handle qXfer:osadata:read. */
1578 handle_qxfer_osdata (const char *annex
,
1579 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1580 ULONGEST offset
, LONGEST len
)
1582 if (the_target
->qxfer_osdata
== NULL
|| writebuf
!= NULL
)
1585 return (*the_target
->qxfer_osdata
) (annex
, readbuf
, NULL
, offset
, len
);
1588 /* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
1591 handle_qxfer_siginfo (const char *annex
,
1592 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1593 ULONGEST offset
, LONGEST len
)
1595 if (the_target
->qxfer_siginfo
== NULL
)
1598 if (annex
[0] != '\0' || current_thread
== NULL
)
1601 return (*the_target
->qxfer_siginfo
) (annex
, readbuf
, writebuf
, offset
, len
);
1604 /* Handle qXfer:spu:read and qXfer:spu:write. */
1607 handle_qxfer_spu (const char *annex
,
1608 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1609 ULONGEST offset
, LONGEST len
)
1611 if (the_target
->qxfer_spu
== NULL
)
1614 if (current_thread
== NULL
)
1617 return (*the_target
->qxfer_spu
) (annex
, readbuf
, writebuf
, offset
, len
);
1620 /* Handle qXfer:statictrace:read. */
1623 handle_qxfer_statictrace (const char *annex
,
1624 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1625 ULONGEST offset
, LONGEST len
)
1629 if (writebuf
!= NULL
)
1632 if (annex
[0] != '\0' || current_thread
== NULL
|| current_traceframe
== -1)
1635 if (traceframe_read_sdata (current_traceframe
, offset
,
1636 readbuf
, len
, &nbytes
))
1641 /* Helper for handle_qxfer_threads_proper.
1642 Emit the XML to describe the thread of INF. */
1645 handle_qxfer_threads_worker (thread_info
*thread
, struct buffer
*buffer
)
1647 ptid_t ptid
= ptid_of (thread
);
1649 int core
= target_core_of_thread (ptid
);
1651 const char *name
= target_thread_name (ptid
);
1654 bool handle_status
= target_thread_handle (ptid
, &handle
, &handle_len
);
1656 write_ptid (ptid_s
, ptid
);
1658 buffer_xml_printf (buffer
, "<thread id=\"%s\"", ptid_s
);
1662 sprintf (core_s
, "%d", core
);
1663 buffer_xml_printf (buffer
, " core=\"%s\"", core_s
);
1667 buffer_xml_printf (buffer
, " name=\"%s\"", name
);
1671 char *handle_s
= (char *) alloca (handle_len
* 2 + 1);
1672 bin2hex (handle
, handle_s
, handle_len
);
1673 buffer_xml_printf (buffer
, " handle=\"%s\"", handle_s
);
1676 buffer_xml_printf (buffer
, "/>\n");
1679 /* Helper for handle_qxfer_threads. */
1682 handle_qxfer_threads_proper (struct buffer
*buffer
)
1684 buffer_grow_str (buffer
, "<threads>\n");
1686 for_each_thread ([&] (thread_info
*thread
)
1688 handle_qxfer_threads_worker (thread
, buffer
);
1691 buffer_grow_str0 (buffer
, "</threads>\n");
1694 /* Handle qXfer:threads:read. */
1697 handle_qxfer_threads (const char *annex
,
1698 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1699 ULONGEST offset
, LONGEST len
)
1701 static char *result
= 0;
1702 static unsigned int result_length
= 0;
1704 if (writebuf
!= NULL
)
1707 if (annex
[0] != '\0')
1712 struct buffer buffer
;
1713 /* When asked for data at offset 0, generate everything and store into
1714 'result'. Successive reads will be served off 'result'. */
1718 buffer_init (&buffer
);
1720 handle_qxfer_threads_proper (&buffer
);
1722 result
= buffer_finish (&buffer
);
1723 result_length
= strlen (result
);
1724 buffer_free (&buffer
);
1727 if (offset
>= result_length
)
1729 /* We're out of data. */
1736 if (len
> result_length
- offset
)
1737 len
= result_length
- offset
;
1739 memcpy (readbuf
, result
+ offset
, len
);
1744 /* Handle qXfer:traceframe-info:read. */
1747 handle_qxfer_traceframe_info (const char *annex
,
1748 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1749 ULONGEST offset
, LONGEST len
)
1751 static char *result
= 0;
1752 static unsigned int result_length
= 0;
1754 if (writebuf
!= NULL
)
1757 if (!target_running () || annex
[0] != '\0' || current_traceframe
== -1)
1762 struct buffer buffer
;
1764 /* When asked for data at offset 0, generate everything and
1765 store into 'result'. Successive reads will be served off
1769 buffer_init (&buffer
);
1771 traceframe_read_info (current_traceframe
, &buffer
);
1773 result
= buffer_finish (&buffer
);
1774 result_length
= strlen (result
);
1775 buffer_free (&buffer
);
1778 if (offset
>= result_length
)
1780 /* We're out of data. */
1787 if (len
> result_length
- offset
)
1788 len
= result_length
- offset
;
1790 memcpy (readbuf
, result
+ offset
, len
);
1794 /* Handle qXfer:fdpic:read. */
1797 handle_qxfer_fdpic (const char *annex
, gdb_byte
*readbuf
,
1798 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1800 if (the_target
->read_loadmap
== NULL
)
1803 if (current_thread
== NULL
)
1806 return (*the_target
->read_loadmap
) (annex
, offset
, readbuf
, len
);
1809 /* Handle qXfer:btrace:read. */
1812 handle_qxfer_btrace (const char *annex
,
1813 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1814 ULONGEST offset
, LONGEST len
)
1816 static struct buffer cache
;
1817 struct thread_info
*thread
;
1818 enum btrace_read_type type
;
1821 if (the_target
->read_btrace
== NULL
|| writebuf
!= NULL
)
1824 if (ptid_equal (general_thread
, null_ptid
)
1825 || ptid_equal (general_thread
, minus_one_ptid
))
1827 strcpy (own_buf
, "E.Must select a single thread.");
1831 thread
= find_thread_ptid (general_thread
);
1834 strcpy (own_buf
, "E.No such thread.");
1838 if (thread
->btrace
== NULL
)
1840 strcpy (own_buf
, "E.Btrace not enabled.");
1844 if (strcmp (annex
, "all") == 0)
1845 type
= BTRACE_READ_ALL
;
1846 else if (strcmp (annex
, "new") == 0)
1847 type
= BTRACE_READ_NEW
;
1848 else if (strcmp (annex
, "delta") == 0)
1849 type
= BTRACE_READ_DELTA
;
1852 strcpy (own_buf
, "E.Bad annex.");
1858 buffer_free (&cache
);
1860 result
= target_read_btrace (thread
->btrace
, &cache
, type
);
1863 memcpy (own_buf
, cache
.buffer
, cache
.used_size
);
1867 else if (offset
> cache
.used_size
)
1869 buffer_free (&cache
);
1873 if (len
> cache
.used_size
- offset
)
1874 len
= cache
.used_size
- offset
;
1876 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1881 /* Handle qXfer:btrace-conf:read. */
1884 handle_qxfer_btrace_conf (const char *annex
,
1885 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1886 ULONGEST offset
, LONGEST len
)
1888 static struct buffer cache
;
1889 struct thread_info
*thread
;
1892 if (the_target
->read_btrace_conf
== NULL
|| writebuf
!= NULL
)
1895 if (annex
[0] != '\0')
1898 if (ptid_equal (general_thread
, null_ptid
)
1899 || ptid_equal (general_thread
, minus_one_ptid
))
1901 strcpy (own_buf
, "E.Must select a single thread.");
1905 thread
= find_thread_ptid (general_thread
);
1908 strcpy (own_buf
, "E.No such thread.");
1912 if (thread
->btrace
== NULL
)
1914 strcpy (own_buf
, "E.Btrace not enabled.");
1920 buffer_free (&cache
);
1922 result
= target_read_btrace_conf (thread
->btrace
, &cache
);
1925 memcpy (own_buf
, cache
.buffer
, cache
.used_size
);
1929 else if (offset
> cache
.used_size
)
1931 buffer_free (&cache
);
1935 if (len
> cache
.used_size
- offset
)
1936 len
= cache
.used_size
- offset
;
1938 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1943 static const struct qxfer qxfer_packets
[] =
1945 { "auxv", handle_qxfer_auxv
},
1946 { "btrace", handle_qxfer_btrace
},
1947 { "btrace-conf", handle_qxfer_btrace_conf
},
1948 { "exec-file", handle_qxfer_exec_file
},
1949 { "fdpic", handle_qxfer_fdpic
},
1950 { "features", handle_qxfer_features
},
1951 { "libraries", handle_qxfer_libraries
},
1952 { "libraries-svr4", handle_qxfer_libraries_svr4
},
1953 { "osdata", handle_qxfer_osdata
},
1954 { "siginfo", handle_qxfer_siginfo
},
1955 { "spu", handle_qxfer_spu
},
1956 { "statictrace", handle_qxfer_statictrace
},
1957 { "threads", handle_qxfer_threads
},
1958 { "traceframe-info", handle_qxfer_traceframe_info
},
1962 handle_qxfer (char *own_buf
, int packet_len
, int *new_packet_len_p
)
1970 if (!startswith (own_buf
, "qXfer:"))
1973 /* Grab the object, r/w and annex. */
1974 if (decode_xfer (own_buf
+ 6, &object
, &rw
, &annex
, &offset
) < 0)
1976 write_enn (own_buf
);
1981 i
< sizeof (qxfer_packets
) / sizeof (qxfer_packets
[0]);
1984 const struct qxfer
*q
= &qxfer_packets
[i
];
1986 if (strcmp (object
, q
->object
) == 0)
1988 if (strcmp (rw
, "read") == 0)
1990 unsigned char *data
;
1995 /* Grab the offset and length. */
1996 if (decode_xfer_read (offset
, &ofs
, &len
) < 0)
1998 write_enn (own_buf
);
2002 /* Read one extra byte, as an indicator of whether there is
2004 if (len
> PBUFSIZ
- 2)
2006 data
= (unsigned char *) malloc (len
+ 1);
2009 write_enn (own_buf
);
2012 n
= (*q
->xfer
) (annex
, data
, NULL
, ofs
, len
+ 1);
2020 /* Preserve error message. */
2023 write_enn (own_buf
);
2025 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, len
, 1);
2027 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, n
, 0);
2032 else if (strcmp (rw
, "write") == 0)
2037 unsigned char *data
;
2039 strcpy (own_buf
, "E00");
2040 data
= (unsigned char *) malloc (packet_len
- (offset
- own_buf
));
2043 write_enn (own_buf
);
2046 if (decode_xfer_write (offset
, packet_len
- (offset
- own_buf
),
2047 &ofs
, &len
, data
) < 0)
2050 write_enn (own_buf
);
2054 n
= (*q
->xfer
) (annex
, NULL
, data
, ofs
, len
);
2062 /* Preserve error message. */
2065 write_enn (own_buf
);
2067 sprintf (own_buf
, "%x", n
);
2080 /* Compute 32 bit CRC from inferior memory.
2082 On success, return 32 bit CRC.
2083 On failure, return (unsigned long long) -1. */
2085 static unsigned long long
2086 crc32 (CORE_ADDR base
, int len
, unsigned int crc
)
2090 unsigned char byte
= 0;
2092 /* Return failure if memory read fails. */
2093 if (read_inferior_memory (base
, &byte
, 1) != 0)
2094 return (unsigned long long) -1;
2096 crc
= xcrc32 (&byte
, 1, crc
);
2099 return (unsigned long long) crc
;
2102 /* Add supported btrace packets to BUF. */
2105 supported_btrace_packets (char *buf
)
2107 strcat (buf
, ";Qbtrace:bts+");
2108 strcat (buf
, ";Qbtrace-conf:bts:size+");
2109 strcat (buf
, ";Qbtrace:pt+");
2110 strcat (buf
, ";Qbtrace-conf:pt:size+");
2111 strcat (buf
, ";Qbtrace:off+");
2112 strcat (buf
, ";qXfer:btrace:read+");
2113 strcat (buf
, ";qXfer:btrace-conf:read+");
2116 /* Handle all of the extended 'q' packets. */
2119 handle_query (char *own_buf
, int packet_len
, int *new_packet_len_p
)
2121 static std::list
<thread_info
*>::const_iterator thread_iter
;
2123 /* Reply the current thread id. */
2124 if (strcmp ("qC", own_buf
) == 0 && !disable_packet_qC
)
2127 require_running_or_return (own_buf
);
2129 if (general_thread
!= null_ptid
&& general_thread
!= minus_one_ptid
)
2130 ptid
= general_thread
;
2133 thread_iter
= all_threads
.begin ();
2134 ptid
= (*thread_iter
)->id
;
2137 sprintf (own_buf
, "QC");
2139 write_ptid (own_buf
, ptid
);
2143 if (strcmp ("qSymbol::", own_buf
) == 0)
2145 struct thread_info
*save_thread
= current_thread
;
2147 /* For qSymbol, GDB only changes the current thread if the
2148 previous current thread was of a different process. So if
2149 the previous thread is gone, we need to pick another one of
2150 the same process. This can happen e.g., if we followed an
2151 exec in a non-leader thread. */
2152 if (current_thread
== NULL
)
2155 = find_any_thread_of_pid (ptid_get_pid (general_thread
));
2157 /* Just in case, if we didn't find a thread, then bail out
2158 instead of crashing. */
2159 if (current_thread
== NULL
)
2161 write_enn (own_buf
);
2162 current_thread
= save_thread
;
2167 /* GDB is suggesting new symbols have been loaded. This may
2168 mean a new shared library has been detected as loaded, so
2169 take the opportunity to check if breakpoints we think are
2170 inserted, still are. Note that it isn't guaranteed that
2171 we'll see this when a shared library is loaded, and nor will
2172 we see this for unloads (although breakpoints in unloaded
2173 libraries shouldn't trigger), as GDB may not find symbols for
2174 the library at all. We also re-validate breakpoints when we
2175 see a second GDB breakpoint for the same address, and or when
2176 we access breakpoint shadows. */
2177 validate_breakpoints ();
2179 if (target_supports_tracepoints ())
2180 tracepoint_look_up_symbols ();
2182 if (current_thread
!= NULL
&& the_target
->look_up_symbols
!= NULL
)
2183 (*the_target
->look_up_symbols
) ();
2185 current_thread
= save_thread
;
2187 strcpy (own_buf
, "OK");
2191 if (!disable_packet_qfThreadInfo
)
2193 if (strcmp ("qfThreadInfo", own_buf
) == 0)
2195 require_running_or_return (own_buf
);
2196 thread_iter
= all_threads
.begin ();
2199 ptid_t ptid
= (*thread_iter
)->id
;
2200 write_ptid (own_buf
, ptid
);
2205 if (strcmp ("qsThreadInfo", own_buf
) == 0)
2207 require_running_or_return (own_buf
);
2208 if (thread_iter
!= all_threads
.end ())
2211 ptid_t ptid
= (*thread_iter
)->id
;
2212 write_ptid (own_buf
, ptid
);
2218 sprintf (own_buf
, "l");
2224 if (the_target
->read_offsets
!= NULL
2225 && strcmp ("qOffsets", own_buf
) == 0)
2227 CORE_ADDR text
, data
;
2229 require_running_or_return (own_buf
);
2230 if (the_target
->read_offsets (&text
, &data
))
2231 sprintf (own_buf
, "Text=%lX;Data=%lX;Bss=%lX",
2232 (long)text
, (long)data
, (long)data
);
2234 write_enn (own_buf
);
2239 /* Protocol features query. */
2240 if (startswith (own_buf
, "qSupported")
2241 && (own_buf
[10] == ':' || own_buf
[10] == '\0'))
2243 char *p
= &own_buf
[10];
2244 int gdb_supports_qRelocInsn
= 0;
2246 /* Process each feature being provided by GDB. The first
2247 feature will follow a ':', and latter features will follow
2251 char **qsupported
= NULL
;
2256 /* Two passes, to avoid nested strtok calls in
2257 target_process_qsupported. */
2258 for (p
= strtok (p
+ 1, ";");
2260 p
= strtok (NULL
, ";"))
2263 qsupported
= XRESIZEVEC (char *, qsupported
, count
);
2264 qsupported
[count
- 1] = xstrdup (p
);
2267 for (i
= 0; i
< count
; i
++)
2270 if (strcmp (p
, "multiprocess+") == 0)
2272 /* GDB supports and wants multi-process support if
2274 if (target_supports_multi_process ())
2277 else if (strcmp (p
, "qRelocInsn+") == 0)
2279 /* GDB supports relocate instruction requests. */
2280 gdb_supports_qRelocInsn
= 1;
2282 else if (strcmp (p
, "swbreak+") == 0)
2284 /* GDB wants us to report whether a trap is caused
2285 by a software breakpoint and for us to handle PC
2286 adjustment if necessary on this target. */
2287 if (target_supports_stopped_by_sw_breakpoint ())
2288 swbreak_feature
= 1;
2290 else if (strcmp (p
, "hwbreak+") == 0)
2292 /* GDB wants us to report whether a trap is caused
2293 by a hardware breakpoint. */
2294 if (target_supports_stopped_by_hw_breakpoint ())
2295 hwbreak_feature
= 1;
2297 else if (strcmp (p
, "fork-events+") == 0)
2299 /* GDB supports and wants fork events if possible. */
2300 if (target_supports_fork_events ())
2301 report_fork_events
= 1;
2303 else if (strcmp (p
, "vfork-events+") == 0)
2305 /* GDB supports and wants vfork events if possible. */
2306 if (target_supports_vfork_events ())
2307 report_vfork_events
= 1;
2309 else if (strcmp (p
, "exec-events+") == 0)
2311 /* GDB supports and wants exec events if possible. */
2312 if (target_supports_exec_events ())
2313 report_exec_events
= 1;
2315 else if (strcmp (p
, "vContSupported+") == 0)
2316 vCont_supported
= 1;
2317 else if (strcmp (p
, "QThreadEvents+") == 0)
2319 else if (strcmp (p
, "no-resumed+") == 0)
2321 /* GDB supports and wants TARGET_WAITKIND_NO_RESUMED
2323 report_no_resumed
= 1;
2327 /* Move the unknown features all together. */
2328 qsupported
[i
] = NULL
;
2329 qsupported
[unknown
] = p
;
2334 /* Give the target backend a chance to process the unknown
2336 target_process_qsupported (qsupported
, unknown
);
2338 for (i
= 0; i
< count
; i
++)
2339 free (qsupported
[i
]);
2344 "PacketSize=%x;QPassSignals+;QProgramSignals+;"
2345 "QStartupWithShell+;QEnvironmentHexEncoded+;"
2346 "QEnvironmentReset+;QEnvironmentUnset+;"
2350 if (target_supports_catch_syscall ())
2351 strcat (own_buf
, ";QCatchSyscalls+");
2353 if (the_target
->qxfer_libraries_svr4
!= NULL
)
2354 strcat (own_buf
, ";qXfer:libraries-svr4:read+"
2355 ";augmented-libraries-svr4-read+");
2358 /* We do not have any hook to indicate whether the non-SVR4 target
2359 backend supports qXfer:libraries:read, so always report it. */
2360 strcat (own_buf
, ";qXfer:libraries:read+");
2363 if (the_target
->read_auxv
!= NULL
)
2364 strcat (own_buf
, ";qXfer:auxv:read+");
2366 if (the_target
->qxfer_spu
!= NULL
)
2367 strcat (own_buf
, ";qXfer:spu:read+;qXfer:spu:write+");
2369 if (the_target
->qxfer_siginfo
!= NULL
)
2370 strcat (own_buf
, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
2372 if (the_target
->read_loadmap
!= NULL
)
2373 strcat (own_buf
, ";qXfer:fdpic:read+");
2375 /* We always report qXfer:features:read, as targets may
2376 install XML files on a subsequent call to arch_setup.
2377 If we reported to GDB on startup that we don't support
2378 qXfer:feature:read at all, we will never be re-queried. */
2379 strcat (own_buf
, ";qXfer:features:read+");
2381 if (transport_is_reliable
)
2382 strcat (own_buf
, ";QStartNoAckMode+");
2384 if (the_target
->qxfer_osdata
!= NULL
)
2385 strcat (own_buf
, ";qXfer:osdata:read+");
2387 if (target_supports_multi_process ())
2388 strcat (own_buf
, ";multiprocess+");
2390 if (target_supports_fork_events ())
2391 strcat (own_buf
, ";fork-events+");
2393 if (target_supports_vfork_events ())
2394 strcat (own_buf
, ";vfork-events+");
2396 if (target_supports_exec_events ())
2397 strcat (own_buf
, ";exec-events+");
2399 if (target_supports_non_stop ())
2400 strcat (own_buf
, ";QNonStop+");
2402 if (target_supports_disable_randomization ())
2403 strcat (own_buf
, ";QDisableRandomization+");
2405 strcat (own_buf
, ";qXfer:threads:read+");
2407 if (target_supports_tracepoints ())
2409 strcat (own_buf
, ";ConditionalTracepoints+");
2410 strcat (own_buf
, ";TraceStateVariables+");
2411 strcat (own_buf
, ";TracepointSource+");
2412 strcat (own_buf
, ";DisconnectedTracing+");
2413 if (gdb_supports_qRelocInsn
&& target_supports_fast_tracepoints ())
2414 strcat (own_buf
, ";FastTracepoints+");
2415 strcat (own_buf
, ";StaticTracepoints+");
2416 strcat (own_buf
, ";InstallInTrace+");
2417 strcat (own_buf
, ";qXfer:statictrace:read+");
2418 strcat (own_buf
, ";qXfer:traceframe-info:read+");
2419 strcat (own_buf
, ";EnableDisableTracepoints+");
2420 strcat (own_buf
, ";QTBuffer:size+");
2421 strcat (own_buf
, ";tracenz+");
2424 if (target_supports_hardware_single_step ()
2425 || target_supports_software_single_step () )
2427 strcat (own_buf
, ";ConditionalBreakpoints+");
2429 strcat (own_buf
, ";BreakpointCommands+");
2431 if (target_supports_agent ())
2432 strcat (own_buf
, ";QAgent+");
2434 supported_btrace_packets (own_buf
);
2436 if (target_supports_stopped_by_sw_breakpoint ())
2437 strcat (own_buf
, ";swbreak+");
2439 if (target_supports_stopped_by_hw_breakpoint ())
2440 strcat (own_buf
, ";hwbreak+");
2442 if (the_target
->pid_to_exec_file
!= NULL
)
2443 strcat (own_buf
, ";qXfer:exec-file:read+");
2445 strcat (own_buf
, ";vContSupported+");
2447 strcat (own_buf
, ";QThreadEvents+");
2449 strcat (own_buf
, ";no-resumed+");
2451 /* Reinitialize components as needed for the new connection. */
2452 hostio_handle_new_gdb_connection ();
2453 target_handle_new_gdb_connection ();
2458 /* Thread-local storage support. */
2459 if (the_target
->get_tls_address
!= NULL
2460 && startswith (own_buf
, "qGetTLSAddr:"))
2462 char *p
= own_buf
+ 12;
2463 CORE_ADDR parts
[2], address
= 0;
2465 ptid_t ptid
= null_ptid
;
2467 require_running_or_return (own_buf
);
2469 for (i
= 0; i
< 3; i
++)
2477 p2
= strchr (p
, ',');
2490 ptid
= read_ptid (p
, NULL
);
2492 decode_address (&parts
[i
- 1], p
, len
);
2496 if (p
!= NULL
|| i
< 3)
2500 struct thread_info
*thread
= find_thread_ptid (ptid
);
2505 err
= the_target
->get_tls_address (thread
, parts
[0], parts
[1],
2511 strcpy (own_buf
, paddress(address
));
2516 write_enn (own_buf
);
2520 /* Otherwise, pretend we do not understand this packet. */
2523 /* Windows OS Thread Information Block address support. */
2524 if (the_target
->get_tib_address
!= NULL
2525 && startswith (own_buf
, "qGetTIBAddr:"))
2530 ptid_t ptid
= read_ptid (own_buf
+ 12, &annex
);
2532 n
= (*the_target
->get_tib_address
) (ptid
, &tlb
);
2535 strcpy (own_buf
, paddress(tlb
));
2540 write_enn (own_buf
);
2546 /* Handle "monitor" commands. */
2547 if (startswith (own_buf
, "qRcmd,"))
2549 char *mon
= (char *) malloc (PBUFSIZ
);
2550 int len
= strlen (own_buf
+ 6);
2554 write_enn (own_buf
);
2559 || hex2bin (own_buf
+ 6, (gdb_byte
*) mon
, len
/ 2) != len
/ 2)
2561 write_enn (own_buf
);
2565 mon
[len
/ 2] = '\0';
2569 if (the_target
->handle_monitor_command
== NULL
2570 || (*the_target
->handle_monitor_command
) (mon
) == 0)
2571 /* Default processing. */
2572 handle_monitor_command (mon
, own_buf
);
2578 if (startswith (own_buf
, "qSearch:memory:"))
2580 require_running_or_return (own_buf
);
2581 handle_search_memory (own_buf
, packet_len
);
2585 if (strcmp (own_buf
, "qAttached") == 0
2586 || startswith (own_buf
, "qAttached:"))
2588 struct process_info
*process
;
2590 if (own_buf
[sizeof ("qAttached") - 1])
2592 int pid
= strtoul (own_buf
+ sizeof ("qAttached:") - 1, NULL
, 16);
2593 process
= find_process_pid (pid
);
2597 require_running_or_return (own_buf
);
2598 process
= current_process ();
2601 if (process
== NULL
)
2603 write_enn (own_buf
);
2607 strcpy (own_buf
, process
->attached
? "1" : "0");
2611 if (startswith (own_buf
, "qCRC:"))
2613 /* CRC check (compare-section). */
2617 unsigned long long crc
;
2619 require_running_or_return (own_buf
);
2620 comma
= unpack_varlen_hex (own_buf
+ 5, &base
);
2621 if (*comma
++ != ',')
2623 write_enn (own_buf
);
2626 len
= strtoul (comma
, NULL
, 16);
2627 crc
= crc32 (base
, len
, 0xffffffff);
2628 /* Check for memory failure. */
2629 if (crc
== (unsigned long long) -1)
2631 write_enn (own_buf
);
2634 sprintf (own_buf
, "C%lx", (unsigned long) crc
);
2638 if (handle_qxfer (own_buf
, packet_len
, new_packet_len_p
))
2641 if (target_supports_tracepoints () && handle_tracepoint_query (own_buf
))
2644 /* Otherwise we didn't know what packet it was. Say we didn't
2649 static void gdb_wants_all_threads_stopped (void);
2650 static void resume (struct thread_resume
*actions
, size_t n
);
2652 /* The callback that is passed to visit_actioned_threads. */
2653 typedef int (visit_actioned_threads_callback_ftype
)
2654 (const struct thread_resume
*, struct thread_info
*);
2656 /* Call CALLBACK for any thread to which ACTIONS applies to. Returns
2657 true if CALLBACK returns true. Returns false if no matching thread
2658 is found or CALLBACK results false.
2659 Note: This function is itself a callback for find_thread. */
2662 visit_actioned_threads (thread_info
*thread
,
2663 const struct thread_resume
*actions
,
2665 visit_actioned_threads_callback_ftype
*callback
)
2667 for (size_t i
= 0; i
< num_actions
; i
++)
2669 const struct thread_resume
*action
= &actions
[i
];
2671 if (ptid_equal (action
->thread
, minus_one_ptid
)
2672 || ptid_equal (action
->thread
, thread
->id
)
2673 || ((ptid_get_pid (action
->thread
)
2674 == thread
->id
.pid ())
2675 && ptid_get_lwp (action
->thread
) == -1))
2677 if ((*callback
) (action
, thread
))
2685 /* Callback for visit_actioned_threads. If the thread has a pending
2686 status to report, report it now. */
2689 handle_pending_status (const struct thread_resume
*resumption
,
2690 struct thread_info
*thread
)
2692 if (thread
->status_pending_p
)
2694 thread
->status_pending_p
= 0;
2696 last_status
= thread
->last_status
;
2697 last_ptid
= thread
->id
;
2698 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2704 /* Parse vCont packets. */
2706 handle_v_cont (char *own_buf
)
2710 struct thread_resume
*resume_info
;
2711 struct thread_resume default_action
{ null_ptid
};
2713 /* Count the number of semicolons in the packet. There should be one
2714 for every action. */
2720 p
= strchr (p
, ';');
2723 resume_info
= (struct thread_resume
*) malloc (n
* sizeof (resume_info
[0]));
2724 if (resume_info
== NULL
)
2732 memset (&resume_info
[i
], 0, sizeof resume_info
[i
]);
2734 if (p
[0] == 's' || p
[0] == 'S')
2735 resume_info
[i
].kind
= resume_step
;
2736 else if (p
[0] == 'r')
2737 resume_info
[i
].kind
= resume_step
;
2738 else if (p
[0] == 'c' || p
[0] == 'C')
2739 resume_info
[i
].kind
= resume_continue
;
2740 else if (p
[0] == 't')
2741 resume_info
[i
].kind
= resume_stop
;
2745 if (p
[0] == 'S' || p
[0] == 'C')
2748 int sig
= strtol (p
+ 1, &q
, 16);
2753 if (!gdb_signal_to_host_p ((enum gdb_signal
) sig
))
2755 resume_info
[i
].sig
= gdb_signal_to_host ((enum gdb_signal
) sig
);
2757 else if (p
[0] == 'r')
2761 p
= unpack_varlen_hex (p
+ 1, &addr
);
2762 resume_info
[i
].step_range_start
= addr
;
2767 p
= unpack_varlen_hex (p
+ 1, &addr
);
2768 resume_info
[i
].step_range_end
= addr
;
2777 resume_info
[i
].thread
= minus_one_ptid
;
2778 default_action
= resume_info
[i
];
2780 /* Note: we don't increment i here, we'll overwrite this entry
2781 the next time through. */
2783 else if (p
[0] == ':')
2786 ptid_t ptid
= read_ptid (p
+ 1, &q
);
2791 if (p
[0] != ';' && p
[0] != 0)
2794 resume_info
[i
].thread
= ptid
;
2801 resume_info
[i
] = default_action
;
2803 resume (resume_info
, n
);
2808 write_enn (own_buf
);
2813 /* Resume target with ACTIONS, an array of NUM_ACTIONS elements. */
2816 resume (struct thread_resume
*actions
, size_t num_actions
)
2820 /* Check if among the threads that GDB wants actioned, there's
2821 one with a pending status to report. If so, skip actually
2822 resuming/stopping and report the pending event
2825 thread_info
*thread_with_status
= find_thread ([&] (thread_info
*thread
)
2827 return visit_actioned_threads (thread
, actions
, num_actions
,
2828 handle_pending_status
);
2831 if (thread_with_status
!= NULL
)
2837 (*the_target
->resume
) (actions
, num_actions
);
2843 last_ptid
= mywait (minus_one_ptid
, &last_status
, 0, 1);
2845 if (last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
2846 && !report_no_resumed
)
2848 /* The client does not support this stop reply. At least
2850 sprintf (own_buf
, "E.No unwaited-for children left.");
2851 disable_async_io ();
2855 if (last_status
.kind
!= TARGET_WAITKIND_EXITED
2856 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
2857 && last_status
.kind
!= TARGET_WAITKIND_NO_RESUMED
)
2858 current_thread
->last_status
= last_status
;
2860 /* From the client's perspective, all-stop mode always stops all
2861 threads implicitly (and the target backend has already done
2862 so by now). Tag all threads as "want-stopped", so we don't
2863 resume them implicitly without the client telling us to. */
2864 gdb_wants_all_threads_stopped ();
2865 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2866 disable_async_io ();
2868 if (last_status
.kind
== TARGET_WAITKIND_EXITED
2869 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2870 target_mourn_inferior (last_ptid
);
2874 /* Attach to a new program. Return 1 if successful, 0 if failure. */
2876 handle_v_attach (char *own_buf
)
2880 pid
= strtol (own_buf
+ 8, NULL
, 16);
2881 if (pid
!= 0 && attach_inferior (pid
) == 0)
2883 /* Don't report shared library events after attaching, even if
2884 some libraries are preloaded. GDB will always poll the
2885 library list. Avoids the "stopped by shared library event"
2886 notice on the GDB side. */
2891 /* In non-stop, we don't send a resume reply. Stop events
2892 will follow up using the normal notification
2897 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2903 write_enn (own_buf
);
2908 /* Run a new program. Return 1 if successful, 0 if failure. */
2910 handle_v_run (char *own_buf
)
2913 std::vector
<char *> new_argv
;
2914 char *new_program_name
= NULL
;
2918 for (p
= own_buf
+ strlen ("vRun;"); p
&& *p
; p
= strchr (p
, ';'))
2924 for (i
= 0, p
= own_buf
+ strlen ("vRun;"); *p
; p
= next_p
, ++i
)
2926 next_p
= strchr (p
, ';');
2928 next_p
= p
+ strlen (p
);
2930 if (i
== 0 && p
== next_p
)
2932 /* No program specified. */
2933 new_program_name
= NULL
;
2935 else if (p
== next_p
)
2937 /* Empty argument. */
2938 new_argv
.push_back (xstrdup ("''"));
2942 size_t len
= (next_p
- p
) / 2;
2943 /* ARG is the unquoted argument received via the RSP. */
2944 char *arg
= (char *) xmalloc (len
+ 1);
2945 /* FULL_ARGS will contain the quoted version of ARG. */
2946 char *full_arg
= (char *) xmalloc ((len
+ 1) * 2);
2947 /* These are pointers used to navigate the strings above. */
2948 char *tmp_arg
= arg
;
2949 char *tmp_full_arg
= full_arg
;
2952 hex2bin (p
, (gdb_byte
*) arg
, len
);
2955 while (*tmp_arg
!= '\0')
2961 *tmp_full_arg
= '\'';
2967 /* Quote single quote. */
2968 *tmp_full_arg
= '\\';
2976 *tmp_full_arg
= *tmp_arg
;
2982 *tmp_full_arg
++ = '\'';
2984 /* Finish FULL_ARG and push it into the vector containing
2986 *tmp_full_arg
= '\0';
2988 new_program_name
= full_arg
;
2990 new_argv
.push_back (full_arg
);
2996 new_argv
.push_back (NULL
);
2998 if (new_program_name
== NULL
)
3000 /* GDB didn't specify a program to run. Use the program from the
3001 last run with the new argument list. */
3002 if (program_name
== NULL
)
3004 write_enn (own_buf
);
3005 free_vector_argv (new_argv
);
3011 xfree (program_name
);
3012 program_name
= new_program_name
;
3015 /* Free the old argv and install the new one. */
3016 free_vector_argv (program_args
);
3017 program_args
= new_argv
;
3019 create_inferior (program_name
, program_args
);
3021 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
3023 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
3025 /* In non-stop, sending a resume reply doesn't set the general
3026 thread, but GDB assumes a vRun sets it (this is so GDB can
3027 query which is the main thread of the new inferior. */
3029 general_thread
= last_ptid
;
3035 write_enn (own_buf
);
3040 /* Kill process. Return 1 if successful, 0 if failure. */
3042 handle_v_kill (char *own_buf
)
3045 char *p
= &own_buf
[6];
3047 pid
= strtol (p
, NULL
, 16);
3050 if (pid
!= 0 && kill_inferior (pid
) == 0)
3052 last_status
.kind
= TARGET_WAITKIND_SIGNALLED
;
3053 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
3054 last_ptid
= pid_to_ptid (pid
);
3055 discard_queued_stop_replies (last_ptid
);
3061 write_enn (own_buf
);
3066 /* Handle all of the extended 'v' packets. */
3068 handle_v_requests (char *own_buf
, int packet_len
, int *new_packet_len
)
3070 if (!disable_packet_vCont
)
3072 if (strcmp (own_buf
, "vCtrlC") == 0)
3074 (*the_target
->request_interrupt
) ();
3079 if (startswith (own_buf
, "vCont;"))
3081 handle_v_cont (own_buf
);
3085 if (startswith (own_buf
, "vCont?"))
3087 strcpy (own_buf
, "vCont;c;C;t");
3089 if (target_supports_hardware_single_step ()
3090 || target_supports_software_single_step ()
3091 || !vCont_supported
)
3093 /* If target supports single step either by hardware or by
3094 software, add actions s and S to the list of supported
3095 actions. On the other hand, if GDB doesn't request the
3096 supported vCont actions in qSupported packet, add s and
3097 S to the list too. */
3098 own_buf
= own_buf
+ strlen (own_buf
);
3099 strcpy (own_buf
, ";s;S");
3102 if (target_supports_range_stepping ())
3104 own_buf
= own_buf
+ strlen (own_buf
);
3105 strcpy (own_buf
, ";r");
3111 if (startswith (own_buf
, "vFile:")
3112 && handle_vFile (own_buf
, packet_len
, new_packet_len
))
3115 if (startswith (own_buf
, "vAttach;"))
3117 if ((!extended_protocol
|| !multi_process
) && target_running ())
3119 fprintf (stderr
, "Already debugging a process\n");
3120 write_enn (own_buf
);
3123 handle_v_attach (own_buf
);
3127 if (startswith (own_buf
, "vRun;"))
3129 if ((!extended_protocol
|| !multi_process
) && target_running ())
3131 fprintf (stderr
, "Already debugging a process\n");
3132 write_enn (own_buf
);
3135 handle_v_run (own_buf
);
3139 if (startswith (own_buf
, "vKill;"))
3141 if (!target_running ())
3143 fprintf (stderr
, "No process to kill\n");
3144 write_enn (own_buf
);
3147 handle_v_kill (own_buf
);
3151 if (handle_notif_ack (own_buf
, packet_len
))
3154 /* Otherwise we didn't know what packet it was. Say we didn't
3160 /* Resume thread and wait for another event. In non-stop mode,
3161 don't really wait here, but return immediatelly to the event
3164 myresume (char *own_buf
, int step
, int sig
)
3166 struct thread_resume resume_info
[2];
3168 int valid_cont_thread
;
3170 valid_cont_thread
= (!ptid_equal (cont_thread
, null_ptid
)
3171 && !ptid_equal (cont_thread
, minus_one_ptid
));
3173 if (step
|| sig
|| valid_cont_thread
)
3175 resume_info
[0].thread
= current_ptid
;
3177 resume_info
[0].kind
= resume_step
;
3179 resume_info
[0].kind
= resume_continue
;
3180 resume_info
[0].sig
= sig
;
3184 if (!valid_cont_thread
)
3186 resume_info
[n
].thread
= minus_one_ptid
;
3187 resume_info
[n
].kind
= resume_continue
;
3188 resume_info
[n
].sig
= 0;
3192 resume (resume_info
, n
);
3195 /* Callback for for_each_thread. Make a new stop reply for each
3199 queue_stop_reply_callback (thread_info
*thread
)
3201 /* For now, assume targets that don't have this callback also don't
3202 manage the thread's last_status field. */
3203 if (the_target
->thread_stopped
== NULL
)
3205 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
3207 new_notif
->ptid
= thread
->id
;
3208 new_notif
->status
= thread
->last_status
;
3209 /* Pass the last stop reply back to GDB, but don't notify
3211 notif_event_enque (¬if_stop
,
3212 (struct notif_event
*) new_notif
);
3216 if (thread_stopped (thread
))
3220 std::string status_string
3221 = target_waitstatus_to_string (&thread
->last_status
);
3223 debug_printf ("Reporting thread %s as already stopped with %s\n",
3224 target_pid_to_str (thread
->id
),
3225 status_string
.c_str ());
3228 gdb_assert (thread
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3230 /* Pass the last stop reply back to GDB, but don't notify
3232 queue_stop_reply (thread
->id
, &thread
->last_status
);
3237 /* Set this inferior threads's state as "want-stopped". We won't
3238 resume this thread until the client gives us another action for
3242 gdb_wants_thread_stopped (thread_info
*thread
)
3244 thread
->last_resume_kind
= resume_stop
;
3246 if (thread
->last_status
.kind
== TARGET_WAITKIND_IGNORE
)
3248 /* Most threads are stopped implicitly (all-stop); tag that with
3250 thread
->last_status
.kind
= TARGET_WAITKIND_STOPPED
;
3251 thread
->last_status
.value
.sig
= GDB_SIGNAL_0
;
3255 /* Set all threads' states as "want-stopped". */
3258 gdb_wants_all_threads_stopped (void)
3260 for_each_thread (gdb_wants_thread_stopped
);
3263 /* Callback for for_each_thread. If the thread is stopped with an
3264 interesting event, mark it as having a pending event. */
3267 set_pending_status_callback (thread_info
*thread
)
3269 if (thread
->last_status
.kind
!= TARGET_WAITKIND_STOPPED
3270 || (thread
->last_status
.value
.sig
!= GDB_SIGNAL_0
3271 /* A breakpoint, watchpoint or finished step from a previous
3272 GDB run isn't considered interesting for a new GDB run.
3273 If we left those pending, the new GDB could consider them
3274 random SIGTRAPs. This leaves out real async traps. We'd
3275 have to peek into the (target-specific) siginfo to
3276 distinguish those. */
3277 && thread
->last_status
.value
.sig
!= GDB_SIGNAL_TRAP
))
3278 thread
->status_pending_p
= 1;
3281 /* Status handler for the '?' packet. */
3284 handle_status (char *own_buf
)
3286 /* GDB is connected, don't forward events to the target anymore. */
3287 for_each_process ([] (process_info
*process
) {
3288 process
->gdb_detached
= 0;
3291 /* In non-stop mode, we must send a stop reply for each stopped
3292 thread. In all-stop mode, just send one for the first stopped
3297 for_each_thread (queue_stop_reply_callback
);
3299 /* The first is sent immediatly. OK is sent if there is no
3300 stopped thread, which is the same handling of the vStopped
3301 packet (by design). */
3302 notif_write_event (¬if_stop
, own_buf
);
3306 thread_info
*thread
= NULL
;
3309 stabilize_threads ();
3310 gdb_wants_all_threads_stopped ();
3312 /* We can only report one status, but we might be coming out of
3313 non-stop -- if more than one thread is stopped with
3314 interesting events, leave events for the threads we're not
3315 reporting now pending. They'll be reported the next time the
3316 threads are resumed. Start by marking all interesting events
3318 for_each_thread (set_pending_status_callback
);
3320 /* Prefer the last thread that reported an event to GDB (even if
3321 that was a GDB_SIGNAL_TRAP). */
3322 if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
3323 && last_status
.kind
!= TARGET_WAITKIND_EXITED
3324 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
3325 thread
= find_thread_ptid (last_ptid
);
3327 /* If the last event thread is not found for some reason, look
3328 for some other thread that might have an event to report. */
3330 thread
= find_thread ([] (thread_info
*thread
)
3332 return thread
->status_pending_p
;
3335 /* If we're still out of luck, simply pick the first thread in
3338 thread
= get_first_thread ();
3342 struct thread_info
*tp
= (struct thread_info
*) thread
;
3344 /* We're reporting this event, so it's no longer
3346 tp
->status_pending_p
= 0;
3348 /* GDB assumes the current thread is the thread we're
3349 reporting the status for. */
3350 general_thread
= thread
->id
;
3351 set_desired_thread ();
3353 gdb_assert (tp
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3354 prepare_resume_reply (own_buf
, tp
->id
, &tp
->last_status
);
3357 strcpy (own_buf
, "W00");
3362 gdbserver_version (void)
3364 printf ("GNU gdbserver %s%s\n"
3365 "Copyright (C) 2018 Free Software Foundation, Inc.\n"
3366 "gdbserver is free software, covered by the "
3367 "GNU General Public License.\n"
3368 "This gdbserver was configured as \"%s\"\n",
3369 PKGVERSION
, version
, host_name
);
3373 gdbserver_usage (FILE *stream
)
3375 fprintf (stream
, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
3376 "\tgdbserver [OPTIONS] --attach COMM PID\n"
3377 "\tgdbserver [OPTIONS] --multi COMM\n"
3379 "COMM may either be a tty device (for serial debugging),\n"
3380 "HOST:PORT to listen for a TCP connection, or '-' or 'stdio' to use \n"
3381 "stdin/stdout of gdbserver.\n"
3382 "PROG is the executable program. ARGS are arguments passed to inferior.\n"
3383 "PID is the process ID to attach to, when --attach is specified.\n"
3385 "Operating modes:\n"
3387 " --attach Attach to running process PID.\n"
3388 " --multi Start server without a specific program, and\n"
3389 " only quit when explicitly commanded.\n"
3390 " --once Exit after the first connection has closed.\n"
3391 " --help Print this message and then exit.\n"
3392 " --version Display version information and exit.\n"
3396 " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n"
3397 " --disable-randomization\n"
3398 " Run PROG with address space randomization disabled.\n"
3399 " --no-disable-randomization\n"
3400 " Don't disable address space randomization when\n"
3402 " --startup-with-shell\n"
3403 " Start PROG using a shell. I.e., execs a shell that\n"
3404 " then execs PROG. (default)\n"
3405 " --no-startup-with-shell\n"
3406 " Exec PROG directly instead of using a shell.\n"
3407 " Disables argument globbing and variable substitution\n"
3408 " on UNIX-like systems.\n"
3412 " --debug Enable general debugging output.\n"
3413 " --debug-format=opt1[,opt2,...]\n"
3414 " Specify extra content in debugging output.\n"
3419 " --remote-debug Enable remote protocol debugging output.\n"
3420 " --disable-packet=opt1[,opt2,...]\n"
3421 " Disable support for RSP packets or features.\n"
3423 " vCont, Tthread, qC, qfThreadInfo and \n"
3424 " threads (disable all threading packets).\n"
3426 "For more information, consult the GDB manual (available as on-line \n"
3427 "info or a printed manual).\n");
3428 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
3429 fprintf (stream
, "Report bugs to \"%s\".\n", REPORT_BUGS_TO
);
3433 gdbserver_show_disableable (FILE *stream
)
3435 fprintf (stream
, "Disableable packets:\n"
3436 " vCont \tAll vCont packets\n"
3437 " qC \tQuerying the current thread\n"
3438 " qfThreadInfo\tThread listing\n"
3439 " Tthread \tPassing the thread specifier in the "
3440 "T stop reply packet\n"
3441 " threads \tAll of the above\n");
3445 kill_inferior_callback (process_info
*process
)
3447 int pid
= process
->pid
;
3449 kill_inferior (pid
);
3450 discard_queued_stop_replies (pid_to_ptid (pid
));
3453 /* Call this when exiting gdbserver with possible inferiors that need
3454 to be killed or detached from. */
3457 detach_or_kill_for_exit (void)
3459 /* First print a list of the inferiors we will be killing/detaching.
3460 This is to assist the user, for example, in case the inferior unexpectedly
3461 dies after we exit: did we screw up or did the inferior exit on its own?
3462 Having this info will save some head-scratching. */
3464 if (have_started_inferiors_p ())
3466 fprintf (stderr
, "Killing process(es):");
3468 for_each_process ([] (process_info
*process
) {
3469 if (!process
->attached
)
3470 fprintf (stderr
, " %d", process
->pid
);
3473 fprintf (stderr
, "\n");
3475 if (have_attached_inferiors_p ())
3477 fprintf (stderr
, "Detaching process(es):");
3479 for_each_process ([] (process_info
*process
) {
3480 if (process
->attached
)
3481 fprintf (stderr
, " %d", process
->pid
);
3484 fprintf (stderr
, "\n");
3487 /* Now we can kill or detach the inferiors. */
3488 for_each_process ([] (process_info
*process
) {
3489 int pid
= process
->pid
;
3491 if (process
->attached
)
3492 detach_inferior (pid
);
3494 kill_inferior (pid
);
3496 discard_queued_stop_replies (pid_to_ptid (pid
));
3500 /* Value that will be passed to exit(3) when gdbserver exits. */
3501 static int exit_code
;
3503 /* Cleanup version of detach_or_kill_for_exit. */
3506 detach_or_kill_for_exit_cleanup (void *ignore
)
3511 detach_or_kill_for_exit ();
3514 CATCH (exception
, RETURN_MASK_ALL
)
3517 fprintf (stderr
, "Detach or kill failed: %s\n", exception
.message
);
3523 /* Main function. This is called by the real "main" function,
3524 wrapped in a TRY_CATCH that handles any uncaught exceptions. */
3526 static void ATTRIBUTE_NORETURN
3527 captured_main (int argc
, char *argv
[])
3532 const char *port
= NULL
;
3533 char **next_arg
= &argv
[1];
3534 volatile int multi_mode
= 0;
3535 volatile int attach
= 0;
3537 bool selftest
= false;
3539 const char *selftest_filter
= NULL
;
3542 while (*next_arg
!= NULL
&& **next_arg
== '-')
3544 if (strcmp (*next_arg
, "--version") == 0)
3546 gdbserver_version ();
3549 else if (strcmp (*next_arg
, "--help") == 0)
3551 gdbserver_usage (stdout
);
3554 else if (strcmp (*next_arg
, "--attach") == 0)
3556 else if (strcmp (*next_arg
, "--multi") == 0)
3558 else if (strcmp (*next_arg
, "--wrapper") == 0)
3565 while (*next_arg
!= NULL
&& strcmp (*next_arg
, "--") != 0)
3567 wrapper_argv
+= *next_arg
;
3568 wrapper_argv
+= ' ';
3572 if (!wrapper_argv
.empty ())
3574 /* Erase the last whitespace. */
3575 wrapper_argv
.erase (wrapper_argv
.end () - 1);
3578 if (next_arg
== tmp
|| *next_arg
== NULL
)
3580 gdbserver_usage (stderr
);
3584 /* Consume the "--". */
3587 else if (strcmp (*next_arg
, "--debug") == 0)
3589 else if (startswith (*next_arg
, "--debug-format="))
3591 std::string error_msg
3592 = parse_debug_format_options ((*next_arg
)
3593 + sizeof ("--debug-format=") - 1, 0);
3595 if (!error_msg
.empty ())
3597 fprintf (stderr
, "%s", error_msg
.c_str ());
3601 else if (strcmp (*next_arg
, "--remote-debug") == 0)
3603 else if (strcmp (*next_arg
, "--disable-packet") == 0)
3605 gdbserver_show_disableable (stdout
);
3608 else if (startswith (*next_arg
, "--disable-packet="))
3610 char *packets
, *tok
;
3612 packets
= *next_arg
+= sizeof ("--disable-packet=") - 1;
3613 for (tok
= strtok (packets
, ",");
3615 tok
= strtok (NULL
, ","))
3617 if (strcmp ("vCont", tok
) == 0)
3618 disable_packet_vCont
= 1;
3619 else if (strcmp ("Tthread", tok
) == 0)
3620 disable_packet_Tthread
= 1;
3621 else if (strcmp ("qC", tok
) == 0)
3622 disable_packet_qC
= 1;
3623 else if (strcmp ("qfThreadInfo", tok
) == 0)
3624 disable_packet_qfThreadInfo
= 1;
3625 else if (strcmp ("threads", tok
) == 0)
3627 disable_packet_vCont
= 1;
3628 disable_packet_Tthread
= 1;
3629 disable_packet_qC
= 1;
3630 disable_packet_qfThreadInfo
= 1;
3634 fprintf (stderr
, "Don't know how to disable \"%s\".\n\n",
3636 gdbserver_show_disableable (stderr
);
3641 else if (strcmp (*next_arg
, "-") == 0)
3643 /* "-" specifies a stdio connection and is a form of port
3645 port
= STDIO_CONNECTION_NAME
;
3649 else if (strcmp (*next_arg
, "--disable-randomization") == 0)
3650 disable_randomization
= 1;
3651 else if (strcmp (*next_arg
, "--no-disable-randomization") == 0)
3652 disable_randomization
= 0;
3653 else if (strcmp (*next_arg
, "--startup-with-shell") == 0)
3654 startup_with_shell
= true;
3655 else if (strcmp (*next_arg
, "--no-startup-with-shell") == 0)
3656 startup_with_shell
= false;
3657 else if (strcmp (*next_arg
, "--once") == 0)
3659 else if (strcmp (*next_arg
, "--selftest") == 0)
3661 else if (startswith (*next_arg
, "--selftest="))
3665 selftest_filter
= *next_arg
+ strlen ("--selftest=");
3670 fprintf (stderr
, "Unknown argument: %s\n", *next_arg
);
3683 if ((port
== NULL
|| (!attach
&& !multi_mode
&& *next_arg
== NULL
))
3686 gdbserver_usage (stderr
);
3690 /* Remember stdio descriptors. LISTEN_DESC must not be listed, it will be
3691 opened by remote_prepare. */
3694 save_original_signals_state (false);
3696 /* We need to know whether the remote connection is stdio before
3697 starting the inferior. Inferiors created in this scenario have
3698 stdin,stdout redirected. So do this here before we call
3701 remote_prepare (port
);
3706 /* --attach used to come after PORT, so allow it there for
3708 if (*next_arg
!= NULL
&& strcmp (*next_arg
, "--attach") == 0)
3715 && (*next_arg
== NULL
3716 || (*next_arg
)[0] == '\0'
3717 || (pid
= strtoul (*next_arg
, &arg_end
, 0)) == 0
3719 || next_arg
[1] != NULL
))
3724 gdbserver_usage (stderr
);
3728 /* Gather information about the environment. */
3729 our_environ
= gdb_environ::from_host_environ ();
3731 initialize_async_io ();
3733 have_job_control ();
3734 initialize_event_loop ();
3735 if (target_supports_tracepoints ())
3736 initialize_tracepoint ();
3737 initialize_notif ();
3739 own_buf
= (char *) xmalloc (PBUFSIZ
+ 1);
3740 mem_buf
= (unsigned char *) xmalloc (PBUFSIZ
);
3745 selftests::run_tests (selftest_filter
);
3747 printf (_("Selftests are not available in a non-development build.\n"));
3749 throw_quit ("Quit");
3752 if (pid
== 0 && *next_arg
!= NULL
)
3756 n
= argc
- (next_arg
- argv
);
3757 program_name
= xstrdup (next_arg
[0]);
3758 for (i
= 1; i
< n
; i
++)
3759 program_args
.push_back (xstrdup (next_arg
[i
]));
3760 program_args
.push_back (NULL
);
3762 /* Wait till we are at first instruction in program. */
3763 create_inferior (program_name
, program_args
);
3765 /* We are now (hopefully) stopped at the first instruction of
3766 the target process. This assumes that the target process was
3767 successfully created. */
3771 if (attach_inferior (pid
) == -1)
3772 error ("Attaching not supported on this target");
3774 /* Otherwise succeeded. */
3778 last_status
.kind
= TARGET_WAITKIND_EXITED
;
3779 last_status
.value
.integer
= 0;
3780 last_ptid
= minus_one_ptid
;
3782 make_cleanup (detach_or_kill_for_exit_cleanup
, NULL
);
3784 /* Don't report shared library events on the initial connection,
3785 even if some libraries are preloaded. Avoids the "stopped by
3786 shared library event" notice on gdb side. */
3789 if (last_status
.kind
== TARGET_WAITKIND_EXITED
3790 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
3795 if (!was_running
&& !multi_mode
)
3796 error ("No program to debug");
3803 report_fork_events
= 0;
3804 report_vfork_events
= 0;
3805 report_exec_events
= 0;
3806 /* Be sure we're out of tfind mode. */
3807 current_traceframe
= -1;
3808 cont_thread
= null_ptid
;
3809 swbreak_feature
= 0;
3810 hwbreak_feature
= 0;
3811 vCont_supported
= 0;
3817 /* Wait for events. This will return when all event sources
3818 are removed from the event loop. */
3819 start_event_loop ();
3821 /* If an exit was requested (using the "monitor exit"
3822 command), terminate now. */
3824 throw_quit ("Quit");
3826 /* The only other way to get here is for getpkt to fail:
3828 - If --once was specified, we're done.
3830 - If not in extended-remote mode, and we're no longer
3831 debugging anything, simply exit: GDB has disconnected
3832 after processing the last process exit.
3834 - Otherwise, close the connection and reopen it at the
3836 if (run_once
|| (!extended_protocol
&& !target_running ()))
3837 throw_quit ("Quit");
3840 "Remote side has terminated connection. "
3841 "GDBserver will reopen the connection.\n");
3843 /* Get rid of any pending statuses. An eventual reconnection
3844 (by the same GDB instance or another) will refresh all its
3845 state from scratch. */
3846 discard_queued_stop_replies (minus_one_ptid
);
3847 for_each_thread ([] (thread_info
*thread
)
3849 thread
->status_pending_p
= 0;
3854 if (disconnected_tracing
)
3856 /* Try to enable non-stop/async mode, so we we can
3857 both wait for an async socket accept, and handle
3858 async target events simultaneously. There's also
3859 no point either in having the target always stop
3860 all threads, when we're going to pass signals
3861 down without informing GDB. */
3864 if (start_non_stop (1))
3867 /* Detaching implicitly resumes all threads;
3868 simply disconnecting does not. */
3874 "Disconnected tracing disabled; "
3875 "stopping trace run.\n");
3880 CATCH (exception
, RETURN_MASK_ERROR
)
3883 fprintf (stderr
, "gdbserver: %s\n", exception
.message
);
3885 if (response_needed
)
3887 write_enn (own_buf
);
3892 throw_quit ("Quit");
3898 /* Main function. */
3901 main (int argc
, char *argv
[])
3906 captured_main (argc
, argv
);
3908 CATCH (exception
, RETURN_MASK_ALL
)
3910 if (exception
.reason
== RETURN_ERROR
)
3913 fprintf (stderr
, "%s\n", exception
.message
);
3914 fprintf (stderr
, "Exiting\n");
3922 gdb_assert_not_reached ("captured_main should never return");
3925 /* Process options coming from Z packets for a breakpoint. PACKET is
3926 the packet buffer. *PACKET is updated to point to the first char
3927 after the last processed option. */
3930 process_point_options (struct gdb_breakpoint
*bp
, const char **packet
)
3932 const char *dataptr
= *packet
;
3935 /* Check if data has the correct format. */
3936 if (*dataptr
!= ';')
3943 if (*dataptr
== ';')
3946 if (*dataptr
== 'X')
3948 /* Conditional expression. */
3950 debug_printf ("Found breakpoint condition.\n");
3951 if (!add_breakpoint_condition (bp
, &dataptr
))
3952 dataptr
= strchrnul (dataptr
, ';');
3954 else if (startswith (dataptr
, "cmds:"))
3956 dataptr
+= strlen ("cmds:");
3958 debug_printf ("Found breakpoint commands %s.\n", dataptr
);
3959 persist
= (*dataptr
== '1');
3961 if (add_breakpoint_commands (bp
, &dataptr
, persist
))
3962 dataptr
= strchrnul (dataptr
, ';');
3966 fprintf (stderr
, "Unknown token %c, ignoring.\n",
3968 /* Skip tokens until we find one that we recognize. */
3969 dataptr
= strchrnul (dataptr
, ';');
3975 /* Event loop callback that handles a serial event. The first byte in
3976 the serial buffer gets us here. We expect characters to arrive at
3977 a brisk pace, so we read the rest of the packet with a blocking
3981 process_serial_event (void)
3989 int new_packet_len
= -1;
3991 disable_async_io ();
3993 response_needed
= 0;
3994 packet_len
= getpkt (own_buf
);
3995 if (packet_len
<= 0)
3998 /* Force an event loop break. */
4001 response_needed
= 1;
4003 char ch
= own_buf
[0];
4007 handle_query (own_buf
, packet_len
, &new_packet_len
);
4010 handle_general_set (own_buf
);
4013 handle_detach (own_buf
);
4016 extended_protocol
= 1;
4020 handle_status (own_buf
);
4023 if (own_buf
[1] == 'c' || own_buf
[1] == 'g' || own_buf
[1] == 's')
4025 require_running_or_break (own_buf
);
4027 ptid_t thread_id
= read_ptid (&own_buf
[2], NULL
);
4029 if (thread_id
== null_ptid
|| thread_id
== minus_one_ptid
)
4030 thread_id
= null_ptid
;
4031 else if (thread_id
.is_pid ())
4033 /* The ptid represents a pid. */
4034 thread_info
*thread
= find_any_thread_of_pid (thread_id
.pid ());
4038 write_enn (own_buf
);
4042 thread_id
= thread
->id
;
4046 /* The ptid represents a lwp/tid. */
4047 if (find_thread_ptid (thread_id
) == NULL
)
4049 write_enn (own_buf
);
4054 if (own_buf
[1] == 'g')
4056 if (ptid_equal (thread_id
, null_ptid
))
4058 /* GDB is telling us to choose any thread. Check if
4059 the currently selected thread is still valid. If
4060 it is not, select the first available. */
4061 thread_info
*thread
= find_thread_ptid (general_thread
);
4063 thread
= get_first_thread ();
4064 thread_id
= thread
->id
;
4067 general_thread
= thread_id
;
4068 set_desired_thread ();
4069 gdb_assert (current_thread
!= NULL
);
4071 else if (own_buf
[1] == 'c')
4072 cont_thread
= thread_id
;
4078 /* Silently ignore it so that gdb can extend the protocol
4079 without compatibility headaches. */
4084 require_running_or_break (own_buf
);
4085 if (current_traceframe
>= 0)
4087 struct regcache
*regcache
4088 = new_register_cache (current_target_desc ());
4090 if (fetch_traceframe_registers (current_traceframe
,
4092 registers_to_string (regcache
, own_buf
);
4094 write_enn (own_buf
);
4095 free_register_cache (regcache
);
4099 struct regcache
*regcache
;
4101 if (!set_desired_thread ())
4102 write_enn (own_buf
);
4105 regcache
= get_thread_regcache (current_thread
, 1);
4106 registers_to_string (regcache
, own_buf
);
4111 require_running_or_break (own_buf
);
4112 if (current_traceframe
>= 0)
4113 write_enn (own_buf
);
4116 struct regcache
*regcache
;
4118 if (!set_desired_thread ())
4119 write_enn (own_buf
);
4122 regcache
= get_thread_regcache (current_thread
, 1);
4123 registers_from_string (regcache
, &own_buf
[1]);
4129 require_running_or_break (own_buf
);
4130 decode_m_packet (&own_buf
[1], &mem_addr
, &len
);
4131 res
= gdb_read_memory (mem_addr
, mem_buf
, len
);
4133 write_enn (own_buf
);
4135 bin2hex (mem_buf
, own_buf
, res
);
4138 require_running_or_break (own_buf
);
4139 decode_M_packet (&own_buf
[1], &mem_addr
, &len
, &mem_buf
);
4140 if (gdb_write_memory (mem_addr
, mem_buf
, len
) == 0)
4143 write_enn (own_buf
);
4146 require_running_or_break (own_buf
);
4147 if (decode_X_packet (&own_buf
[1], packet_len
- 1,
4148 &mem_addr
, &len
, &mem_buf
) < 0
4149 || gdb_write_memory (mem_addr
, mem_buf
, len
) != 0)
4150 write_enn (own_buf
);
4155 require_running_or_break (own_buf
);
4156 hex2bin (own_buf
+ 1, &sig
, 1);
4157 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4158 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4161 myresume (own_buf
, 0, signal
);
4164 require_running_or_break (own_buf
);
4165 hex2bin (own_buf
+ 1, &sig
, 1);
4166 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4167 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4170 myresume (own_buf
, 1, signal
);
4173 require_running_or_break (own_buf
);
4175 myresume (own_buf
, 0, signal
);
4178 require_running_or_break (own_buf
);
4180 myresume (own_buf
, 1, signal
);
4182 case 'Z': /* insert_ ... */
4184 case 'z': /* remove_ ... */
4189 char type
= own_buf
[1];
4191 const int insert
= ch
== 'Z';
4192 const char *p
= &own_buf
[3];
4194 p
= unpack_varlen_hex (p
, &addr
);
4195 kind
= strtol (p
+ 1, &dataptr
, 16);
4199 struct gdb_breakpoint
*bp
;
4201 bp
= set_gdb_breakpoint (type
, addr
, kind
, &res
);
4206 /* GDB may have sent us a list of *point parameters to
4207 be evaluated on the target's side. Read such list
4208 here. If we already have a list of parameters, GDB
4209 is telling us to drop that list and use this one
4211 clear_breakpoint_conditions_and_commands (bp
);
4212 const char *options
= dataptr
;
4213 process_point_options (bp
, &options
);
4217 res
= delete_gdb_breakpoint (type
, addr
, kind
);
4225 write_enn (own_buf
);
4229 response_needed
= 0;
4230 if (!target_running ())
4231 /* The packet we received doesn't make sense - but we can't
4232 reply to it, either. */
4235 fprintf (stderr
, "Killing all inferiors\n");
4237 for_each_process (kill_inferior_callback
);
4239 /* When using the extended protocol, we wait with no program
4240 running. The traditional protocol will exit instead. */
4241 if (extended_protocol
)
4243 last_status
.kind
= TARGET_WAITKIND_EXITED
;
4244 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4252 require_running_or_break (own_buf
);
4254 ptid_t thread_id
= read_ptid (&own_buf
[1], NULL
);
4255 if (find_thread_ptid (thread_id
) == NULL
)
4257 write_enn (own_buf
);
4261 if (mythread_alive (thread_id
))
4264 write_enn (own_buf
);
4268 response_needed
= 0;
4270 /* Restarting the inferior is only supported in the extended
4272 if (extended_protocol
)
4274 if (target_running ())
4275 for_each_process (kill_inferior_callback
);
4277 fprintf (stderr
, "GDBserver restarting\n");
4279 /* Wait till we are at 1st instruction in prog. */
4280 if (program_name
!= NULL
)
4282 create_inferior (program_name
, program_args
);
4284 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4286 /* Stopped at the first instruction of the target
4288 general_thread
= last_ptid
;
4292 /* Something went wrong. */
4293 general_thread
= null_ptid
;
4298 last_status
.kind
= TARGET_WAITKIND_EXITED
;
4299 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4305 /* It is a request we don't understand. Respond with an
4306 empty packet so that gdb knows that we don't support this
4312 /* Extended (long) request. */
4313 handle_v_requests (own_buf
, packet_len
, &new_packet_len
);
4317 /* It is a request we don't understand. Respond with an empty
4318 packet so that gdb knows that we don't support this
4324 if (new_packet_len
!= -1)
4325 putpkt_binary (own_buf
, new_packet_len
);
4329 response_needed
= 0;
4337 /* Event-loop callback for serial events. */
4340 handle_serial_event (int err
, gdb_client_data client_data
)
4343 debug_printf ("handling possible serial event\n");
4345 /* Really handle it. */
4346 if (process_serial_event () < 0)
4349 /* Be sure to not change the selected thread behind GDB's back.
4350 Important in the non-stop mode asynchronous protocol. */
4351 set_desired_thread ();
4356 /* Push a stop notification on the notification queue. */
4359 push_stop_notification (ptid_t ptid
, struct target_waitstatus
*status
)
4361 struct vstop_notif
*vstop_notif
= XNEW (struct vstop_notif
);
4363 vstop_notif
->status
= *status
;
4364 vstop_notif
->ptid
= ptid
;
4365 /* Push Stop notification. */
4366 notif_push (¬if_stop
, (struct notif_event
*) vstop_notif
);
4369 /* Event-loop callback for target events. */
4372 handle_target_event (int err
, gdb_client_data client_data
)
4375 debug_printf ("handling possible target event\n");
4377 last_ptid
= mywait (minus_one_ptid
, &last_status
,
4380 if (last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
)
4382 if (gdb_connected () && report_no_resumed
)
4383 push_stop_notification (null_ptid
, &last_status
);
4385 else if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
)
4387 int pid
= ptid_get_pid (last_ptid
);
4388 struct process_info
*process
= find_process_pid (pid
);
4389 int forward_event
= !gdb_connected () || process
->gdb_detached
;
4391 if (last_status
.kind
== TARGET_WAITKIND_EXITED
4392 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
4394 mark_breakpoints_out (process
);
4395 target_mourn_inferior (last_ptid
);
4397 else if (last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4401 /* We're reporting this thread as stopped. Update its
4402 "want-stopped" state to what the client wants, until it
4403 gets a new resume action. */
4404 current_thread
->last_resume_kind
= resume_stop
;
4405 current_thread
->last_status
= last_status
;
4410 if (!target_running ())
4412 /* The last process exited. We're done. */
4416 if (last_status
.kind
== TARGET_WAITKIND_EXITED
4417 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
4418 || last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4422 /* A thread stopped with a signal, but gdb isn't
4423 connected to handle it. Pass it down to the
4424 inferior, as if it wasn't being traced. */
4425 enum gdb_signal signal
;
4428 debug_printf ("GDB not connected; forwarding event %d for"
4430 (int) last_status
.kind
,
4431 target_pid_to_str (last_ptid
));
4433 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4434 signal
= last_status
.value
.sig
;
4436 signal
= GDB_SIGNAL_0
;
4437 target_continue (last_ptid
, signal
);
4441 push_stop_notification (last_ptid
, &last_status
);
4444 /* Be sure to not change the selected thread behind GDB's back.
4445 Important in the non-stop mode asynchronous protocol. */
4446 set_desired_thread ();
4459 } // namespace selftests
4460 #endif /* GDB_SELF_TEST */