Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Main code for remote server for GDB. |
6aba47ca DJ |
2 | Copyright (C) 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2002, 2003, |
3 | 2004, 2005, 2006, 2007 Free Software Foundation, Inc. | |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
6f0f660e EZ |
19 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
c906108c SS |
21 | |
22 | #include "server.h" | |
23 | ||
a9fa9f7d DJ |
24 | #include <unistd.h> |
25 | #include <signal.h> | |
b80864fb | 26 | #if HAVE_SYS_WAIT_H |
a9fa9f7d | 27 | #include <sys/wait.h> |
b80864fb | 28 | #endif |
a9fa9f7d | 29 | |
a1928bad DJ |
30 | unsigned long cont_thread; |
31 | unsigned long general_thread; | |
32 | unsigned long step_thread; | |
33 | unsigned long thread_from_wait; | |
34 | unsigned long old_thread_from_wait; | |
c906108c | 35 | int extended_protocol; |
0d62e5e8 DJ |
36 | int server_waiting; |
37 | ||
c74d0ad8 DJ |
38 | /* Enable miscellaneous debugging output. The name is historical - it |
39 | was originally used to debug LinuxThreads support. */ | |
40 | int debug_threads; | |
41 | ||
89be2091 DJ |
42 | int pass_signals[TARGET_SIGNAL_LAST]; |
43 | ||
c906108c | 44 | jmp_buf toplevel; |
c906108c | 45 | |
a9fa9f7d DJ |
46 | /* The PID of the originally created or attached inferior. Used to |
47 | send signals to the process when GDB sends us an asynchronous interrupt | |
48 | (user hitting Control-C in the client), and to wait for the child to exit | |
49 | when no longer debugging it. */ | |
50 | ||
a1928bad | 51 | unsigned long signal_pid; |
a9fa9f7d | 52 | |
290fadea RS |
53 | #ifdef SIGTTOU |
54 | /* A file descriptor for the controlling terminal. */ | |
55 | int terminal_fd; | |
56 | ||
57 | /* TERMINAL_FD's original foreground group. */ | |
58 | pid_t old_foreground_pgrp; | |
59 | ||
60 | /* Hand back terminal ownership to the original foreground group. */ | |
61 | ||
62 | static void | |
63 | restore_old_foreground_pgrp (void) | |
64 | { | |
65 | tcsetpgrp (terminal_fd, old_foreground_pgrp); | |
66 | } | |
67 | #endif | |
68 | ||
fc620387 | 69 | static int |
da85418c | 70 | start_inferior (char *argv[], char *statusptr) |
c906108c | 71 | { |
b80864fb | 72 | #ifdef SIGTTOU |
a9fa9f7d DJ |
73 | signal (SIGTTOU, SIG_DFL); |
74 | signal (SIGTTIN, SIG_DFL); | |
b80864fb | 75 | #endif |
a9fa9f7d DJ |
76 | |
77 | signal_pid = create_inferior (argv[0], argv); | |
0d62e5e8 | 78 | |
a1928bad | 79 | fprintf (stderr, "Process %s created; pid = %ld\n", argv[0], |
a9fa9f7d | 80 | signal_pid); |
b80864fb | 81 | fflush (stderr); |
a9fa9f7d | 82 | |
b80864fb | 83 | #ifdef SIGTTOU |
a9fa9f7d DJ |
84 | signal (SIGTTOU, SIG_IGN); |
85 | signal (SIGTTIN, SIG_IGN); | |
290fadea RS |
86 | terminal_fd = fileno (stderr); |
87 | old_foreground_pgrp = tcgetpgrp (terminal_fd); | |
88 | tcsetpgrp (terminal_fd, signal_pid); | |
89 | atexit (restore_old_foreground_pgrp); | |
b80864fb | 90 | #endif |
c906108c SS |
91 | |
92 | /* Wait till we are at 1st instruction in program, return signal number. */ | |
0d62e5e8 | 93 | return mywait (statusptr, 0); |
c906108c SS |
94 | } |
95 | ||
45b7b345 | 96 | static int |
fc620387 | 97 | attach_inferior (int pid, char *statusptr, int *sigptr) |
45b7b345 DJ |
98 | { |
99 | /* myattach should return -1 if attaching is unsupported, | |
100 | 0 if it succeeded, and call error() otherwise. */ | |
a9fa9f7d | 101 | |
45b7b345 DJ |
102 | if (myattach (pid) != 0) |
103 | return -1; | |
104 | ||
6910d122 | 105 | fprintf (stderr, "Attached; pid = %d\n", pid); |
b80864fb | 106 | fflush (stderr); |
6910d122 | 107 | |
a9fa9f7d DJ |
108 | /* FIXME - It may be that we should get the SIGNAL_PID from the |
109 | attach function, so that it can be the main thread instead of | |
110 | whichever we were told to attach to. */ | |
111 | signal_pid = pid; | |
112 | ||
0d62e5e8 | 113 | *sigptr = mywait (statusptr, 0); |
45b7b345 | 114 | |
9db87ebd DJ |
115 | /* GDB knows to ignore the first SIGSTOP after attaching to a running |
116 | process using the "attach" command, but this is different; it's | |
117 | just using "target remote". Pretend it's just starting up. */ | |
b80864fb DJ |
118 | if (*statusptr == 'T' && *sigptr == TARGET_SIGNAL_STOP) |
119 | *sigptr = TARGET_SIGNAL_TRAP; | |
9db87ebd | 120 | |
45b7b345 DJ |
121 | return 0; |
122 | } | |
123 | ||
c906108c | 124 | extern int remote_debug; |
ce3a066d | 125 | |
0876f84a DJ |
126 | /* Decode a qXfer read request. Return 0 if everything looks OK, |
127 | or -1 otherwise. */ | |
128 | ||
129 | static int | |
130 | decode_xfer_read (char *buf, char **annex, CORE_ADDR *ofs, unsigned int *len) | |
131 | { | |
132 | /* Extract and NUL-terminate the annex. */ | |
133 | *annex = buf; | |
134 | while (*buf && *buf != ':') | |
135 | buf++; | |
136 | if (*buf == '\0') | |
137 | return -1; | |
138 | *buf++ = 0; | |
139 | ||
140 | /* After the read/write marker and annex, qXfer looks like a | |
141 | traditional 'm' packet. */ | |
142 | decode_m_packet (buf, ofs, len); | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | /* Write the response to a successful qXfer read. Returns the | |
148 | length of the (binary) data stored in BUF, corresponding | |
149 | to as much of DATA/LEN as we could fit. IS_MORE controls | |
150 | the first character of the response. */ | |
151 | static int | |
23181151 | 152 | write_qxfer_response (char *buf, const void *data, int len, int is_more) |
0876f84a DJ |
153 | { |
154 | int out_len; | |
155 | ||
156 | if (is_more) | |
157 | buf[0] = 'm'; | |
158 | else | |
159 | buf[0] = 'l'; | |
160 | ||
161 | return remote_escape_output (data, len, (unsigned char *) buf + 1, &out_len, | |
162 | PBUFSIZ - 2) + 1; | |
163 | } | |
164 | ||
89be2091 DJ |
165 | /* Handle all of the extended 'Q' packets. */ |
166 | void | |
167 | handle_general_set (char *own_buf) | |
168 | { | |
169 | if (strncmp ("QPassSignals:", own_buf, strlen ("QPassSignals:")) == 0) | |
170 | { | |
171 | int numsigs = (int) TARGET_SIGNAL_LAST, i; | |
172 | const char *p = own_buf + strlen ("QPassSignals:"); | |
173 | CORE_ADDR cursig; | |
174 | ||
175 | p = decode_address_to_semicolon (&cursig, p); | |
176 | for (i = 0; i < numsigs; i++) | |
177 | { | |
178 | if (i == cursig) | |
179 | { | |
180 | pass_signals[i] = 1; | |
181 | if (*p == '\0') | |
182 | /* Keep looping, to clear the remaining signals. */ | |
183 | cursig = -1; | |
184 | else | |
185 | p = decode_address_to_semicolon (&cursig, p); | |
186 | } | |
187 | else | |
188 | pass_signals[i] = 0; | |
189 | } | |
190 | strcpy (own_buf, "OK"); | |
191 | return; | |
192 | } | |
193 | ||
194 | /* Otherwise we didn't know what packet it was. Say we didn't | |
195 | understand it. */ | |
196 | own_buf[0] = 0; | |
197 | } | |
198 | ||
23181151 | 199 | static const char * |
fb1e4ffc | 200 | get_features_xml (const char *annex) |
23181151 DJ |
201 | { |
202 | static int features_supported = -1; | |
203 | static char *document; | |
204 | ||
fb1e4ffc DJ |
205 | #ifdef USE_XML |
206 | extern const char *const xml_builtin[][2]; | |
207 | int i; | |
208 | ||
209 | /* Look for the annex. */ | |
210 | for (i = 0; xml_builtin[i][0] != NULL; i++) | |
211 | if (strcmp (annex, xml_builtin[i][0]) == 0) | |
212 | break; | |
213 | ||
214 | if (xml_builtin[i][0] != NULL) | |
215 | return xml_builtin[i][1]; | |
216 | #endif | |
217 | ||
218 | if (strcmp (annex, "target.xml") != 0) | |
219 | return NULL; | |
220 | ||
23181151 DJ |
221 | if (features_supported == -1) |
222 | { | |
820f2bda PA |
223 | const char *arch = NULL; |
224 | if (the_target->arch_string != NULL) | |
225 | arch = (*the_target->arch_string) (); | |
23181151 DJ |
226 | |
227 | if (arch == NULL) | |
228 | features_supported = 0; | |
229 | else | |
230 | { | |
231 | features_supported = 1; | |
232 | document = malloc (64 + strlen (arch)); | |
233 | snprintf (document, 64 + strlen (arch), | |
234 | "<target><architecture>%s</architecture></target>", | |
235 | arch); | |
236 | } | |
237 | } | |
238 | ||
239 | return document; | |
240 | } | |
241 | ||
c74d0ad8 DJ |
242 | void |
243 | monitor_show_help (void) | |
244 | { | |
245 | monitor_output ("The following monitor commands are supported:\n"); | |
246 | monitor_output (" set debug <0|1>\n"); | |
247 | monitor_output (" Enable general debugging messages\n"); | |
248 | monitor_output (" set remote-debug <0|1>\n"); | |
249 | monitor_output (" Enable remote protocol debugging messages\n"); | |
250 | } | |
251 | ||
ce3a066d DJ |
252 | /* Handle all of the extended 'q' packets. */ |
253 | void | |
0876f84a | 254 | handle_query (char *own_buf, int *new_packet_len_p) |
ce3a066d | 255 | { |
0d62e5e8 DJ |
256 | static struct inferior_list_entry *thread_ptr; |
257 | ||
ce3a066d DJ |
258 | if (strcmp ("qSymbol::", own_buf) == 0) |
259 | { | |
2f2893d9 DJ |
260 | if (the_target->look_up_symbols != NULL) |
261 | (*the_target->look_up_symbols) (); | |
262 | ||
ce3a066d DJ |
263 | strcpy (own_buf, "OK"); |
264 | return; | |
265 | } | |
266 | ||
0d62e5e8 DJ |
267 | if (strcmp ("qfThreadInfo", own_buf) == 0) |
268 | { | |
269 | thread_ptr = all_threads.head; | |
a06660f7 | 270 | sprintf (own_buf, "m%x", thread_to_gdb_id ((struct thread_info *)thread_ptr)); |
0d62e5e8 DJ |
271 | thread_ptr = thread_ptr->next; |
272 | return; | |
273 | } | |
aa691b87 | 274 | |
0d62e5e8 DJ |
275 | if (strcmp ("qsThreadInfo", own_buf) == 0) |
276 | { | |
277 | if (thread_ptr != NULL) | |
278 | { | |
a06660f7 | 279 | sprintf (own_buf, "m%x", thread_to_gdb_id ((struct thread_info *)thread_ptr)); |
0d62e5e8 DJ |
280 | thread_ptr = thread_ptr->next; |
281 | return; | |
282 | } | |
283 | else | |
284 | { | |
285 | sprintf (own_buf, "l"); | |
286 | return; | |
287 | } | |
288 | } | |
aa691b87 | 289 | |
52fb6437 NS |
290 | if (the_target->read_offsets != NULL |
291 | && strcmp ("qOffsets", own_buf) == 0) | |
292 | { | |
293 | CORE_ADDR text, data; | |
294 | ||
295 | if (the_target->read_offsets (&text, &data)) | |
296 | sprintf (own_buf, "Text=%lX;Data=%lX;Bss=%lX", | |
297 | (long)text, (long)data, (long)data); | |
298 | else | |
299 | write_enn (own_buf); | |
300 | ||
301 | return; | |
302 | } | |
303 | ||
aa691b87 | 304 | if (the_target->read_auxv != NULL |
0876f84a | 305 | && strncmp ("qXfer:auxv:read:", own_buf, 16) == 0) |
aa691b87 | 306 | { |
0876f84a DJ |
307 | unsigned char *data; |
308 | int n; | |
aa691b87 RM |
309 | CORE_ADDR ofs; |
310 | unsigned int len; | |
0876f84a DJ |
311 | char *annex; |
312 | ||
313 | /* Reject any annex; grab the offset and length. */ | |
314 | if (decode_xfer_read (own_buf + 16, &annex, &ofs, &len) < 0 | |
315 | || annex[0] != '\0') | |
316 | { | |
317 | strcpy (own_buf, "E00"); | |
318 | return; | |
319 | } | |
320 | ||
321 | /* Read one extra byte, as an indicator of whether there is | |
322 | more. */ | |
323 | if (len > PBUFSIZ - 2) | |
324 | len = PBUFSIZ - 2; | |
325 | data = malloc (len + 1); | |
326 | n = (*the_target->read_auxv) (ofs, data, len + 1); | |
000ef4f0 DJ |
327 | if (n < 0) |
328 | write_enn (own_buf); | |
329 | else if (n > len) | |
0876f84a | 330 | *new_packet_len_p = write_qxfer_response (own_buf, data, len, 1); |
aa691b87 | 331 | else |
0876f84a DJ |
332 | *new_packet_len_p = write_qxfer_response (own_buf, data, n, 0); |
333 | ||
334 | free (data); | |
335 | ||
aa691b87 RM |
336 | return; |
337 | } | |
338 | ||
23181151 DJ |
339 | if (strncmp ("qXfer:features:read:", own_buf, 20) == 0) |
340 | { | |
341 | CORE_ADDR ofs; | |
342 | unsigned int len, total_len; | |
343 | const char *document; | |
344 | char *annex; | |
345 | ||
fb1e4ffc DJ |
346 | /* Check for support. */ |
347 | document = get_features_xml ("target.xml"); | |
23181151 DJ |
348 | if (document == NULL) |
349 | { | |
350 | own_buf[0] = '\0'; | |
351 | return; | |
352 | } | |
353 | ||
fb1e4ffc DJ |
354 | /* Grab the annex, offset, and length. */ |
355 | if (decode_xfer_read (own_buf + 20, &annex, &ofs, &len) < 0) | |
356 | { | |
357 | strcpy (own_buf, "E00"); | |
358 | return; | |
359 | } | |
360 | ||
361 | /* Now grab the correct annex. */ | |
362 | document = get_features_xml (annex); | |
363 | if (document == NULL) | |
23181151 DJ |
364 | { |
365 | strcpy (own_buf, "E00"); | |
366 | return; | |
367 | } | |
368 | ||
369 | total_len = strlen (document); | |
370 | if (len > PBUFSIZ - 2) | |
371 | len = PBUFSIZ - 2; | |
372 | ||
373 | if (ofs > total_len) | |
374 | write_enn (own_buf); | |
375 | else if (len < total_len - ofs) | |
376 | *new_packet_len_p = write_qxfer_response (own_buf, document + ofs, | |
377 | len, 1); | |
378 | else | |
379 | *new_packet_len_p = write_qxfer_response (own_buf, document + ofs, | |
380 | total_len - ofs, 0); | |
381 | ||
382 | return; | |
383 | } | |
384 | ||
be2a5f71 DJ |
385 | /* Protocol features query. */ |
386 | if (strncmp ("qSupported", own_buf, 10) == 0 | |
387 | && (own_buf[10] == ':' || own_buf[10] == '\0')) | |
388 | { | |
89be2091 | 389 | sprintf (own_buf, "PacketSize=%x;QPassSignals+", PBUFSIZ - 1); |
0876f84a DJ |
390 | |
391 | if (the_target->read_auxv != NULL) | |
9f2e1e63 | 392 | strcat (own_buf, ";qXfer:auxv:read+"); |
0876f84a | 393 | |
fb1e4ffc | 394 | if (get_features_xml ("target.xml") != NULL) |
23181151 DJ |
395 | strcat (own_buf, ";qXfer:features:read+"); |
396 | ||
be2a5f71 DJ |
397 | return; |
398 | } | |
399 | ||
dae5f5cf DJ |
400 | /* Thread-local storage support. */ |
401 | if (the_target->get_tls_address != NULL | |
402 | && strncmp ("qGetTLSAddr:", own_buf, 12) == 0) | |
403 | { | |
404 | char *p = own_buf + 12; | |
405 | CORE_ADDR parts[3], address = 0; | |
406 | int i, err; | |
407 | ||
408 | for (i = 0; i < 3; i++) | |
409 | { | |
410 | char *p2; | |
411 | int len; | |
412 | ||
413 | if (p == NULL) | |
414 | break; | |
415 | ||
416 | p2 = strchr (p, ','); | |
417 | if (p2) | |
418 | { | |
419 | len = p2 - p; | |
420 | p2++; | |
421 | } | |
422 | else | |
423 | { | |
424 | len = strlen (p); | |
425 | p2 = NULL; | |
426 | } | |
427 | ||
428 | decode_address (&parts[i], p, len); | |
429 | p = p2; | |
430 | } | |
431 | ||
432 | if (p != NULL || i < 3) | |
433 | err = 1; | |
434 | else | |
435 | { | |
436 | struct thread_info *thread = gdb_id_to_thread (parts[0]); | |
437 | ||
438 | if (thread == NULL) | |
439 | err = 2; | |
440 | else | |
441 | err = the_target->get_tls_address (thread, parts[1], parts[2], | |
442 | &address); | |
443 | } | |
444 | ||
445 | if (err == 0) | |
446 | { | |
447 | sprintf (own_buf, "%llx", address); | |
448 | return; | |
449 | } | |
450 | else if (err > 0) | |
451 | { | |
452 | write_enn (own_buf); | |
453 | return; | |
454 | } | |
455 | ||
456 | /* Otherwise, pretend we do not understand this packet. */ | |
457 | } | |
458 | ||
c74d0ad8 DJ |
459 | /* Handle "monitor" commands. */ |
460 | if (strncmp ("qRcmd,", own_buf, 6) == 0) | |
461 | { | |
462 | char *mon = malloc (PBUFSIZ); | |
463 | int len = strlen (own_buf + 6); | |
464 | ||
465 | if ((len % 1) != 0 || unhexify (mon, own_buf + 6, len / 2) != len / 2) | |
466 | { | |
467 | write_enn (own_buf); | |
468 | free (mon); | |
469 | return; | |
470 | } | |
471 | mon[len / 2] = '\0'; | |
472 | ||
473 | write_ok (own_buf); | |
474 | ||
475 | if (strcmp (mon, "set debug 1") == 0) | |
476 | { | |
477 | debug_threads = 1; | |
478 | monitor_output ("Debug output enabled.\n"); | |
479 | } | |
480 | else if (strcmp (mon, "set debug 0") == 0) | |
481 | { | |
482 | debug_threads = 0; | |
483 | monitor_output ("Debug output disabled.\n"); | |
484 | } | |
485 | else if (strcmp (mon, "set remote-debug 1") == 0) | |
486 | { | |
487 | remote_debug = 1; | |
488 | monitor_output ("Protocol debug output enabled.\n"); | |
489 | } | |
490 | else if (strcmp (mon, "set remote-debug 0") == 0) | |
491 | { | |
492 | remote_debug = 0; | |
493 | monitor_output ("Protocol debug output disabled.\n"); | |
494 | } | |
495 | else if (strcmp (mon, "help") == 0) | |
496 | monitor_show_help (); | |
497 | else | |
498 | { | |
499 | monitor_output ("Unknown monitor command.\n\n"); | |
500 | monitor_show_help (); | |
501 | write_enn (own_buf); | |
502 | } | |
503 | ||
504 | free (mon); | |
505 | return; | |
506 | } | |
507 | ||
ce3a066d DJ |
508 | /* Otherwise we didn't know what packet it was. Say we didn't |
509 | understand it. */ | |
510 | own_buf[0] = 0; | |
511 | } | |
512 | ||
64386c31 DJ |
513 | /* Parse vCont packets. */ |
514 | void | |
fc620387 | 515 | handle_v_cont (char *own_buf, char *status, int *signal) |
64386c31 DJ |
516 | { |
517 | char *p, *q; | |
518 | int n = 0, i = 0; | |
519 | struct thread_resume *resume_info, default_action; | |
520 | ||
521 | /* Count the number of semicolons in the packet. There should be one | |
522 | for every action. */ | |
523 | p = &own_buf[5]; | |
524 | while (p) | |
525 | { | |
526 | n++; | |
527 | p++; | |
528 | p = strchr (p, ';'); | |
529 | } | |
530 | /* Allocate room for one extra action, for the default remain-stopped | |
531 | behavior; if no default action is in the list, we'll need the extra | |
532 | slot. */ | |
533 | resume_info = malloc ((n + 1) * sizeof (resume_info[0])); | |
534 | ||
535 | default_action.thread = -1; | |
536 | default_action.leave_stopped = 1; | |
537 | default_action.step = 0; | |
538 | default_action.sig = 0; | |
539 | ||
540 | p = &own_buf[5]; | |
541 | i = 0; | |
542 | while (*p) | |
543 | { | |
544 | p++; | |
545 | ||
546 | resume_info[i].leave_stopped = 0; | |
547 | ||
548 | if (p[0] == 's' || p[0] == 'S') | |
549 | resume_info[i].step = 1; | |
550 | else if (p[0] == 'c' || p[0] == 'C') | |
551 | resume_info[i].step = 0; | |
552 | else | |
553 | goto err; | |
554 | ||
555 | if (p[0] == 'S' || p[0] == 'C') | |
556 | { | |
557 | int sig; | |
558 | sig = strtol (p + 1, &q, 16); | |
559 | if (p == q) | |
560 | goto err; | |
561 | p = q; | |
562 | ||
563 | if (!target_signal_to_host_p (sig)) | |
564 | goto err; | |
565 | resume_info[i].sig = target_signal_to_host (sig); | |
566 | } | |
567 | else | |
568 | { | |
569 | resume_info[i].sig = 0; | |
570 | p = p + 1; | |
571 | } | |
572 | ||
573 | if (p[0] == 0) | |
574 | { | |
575 | resume_info[i].thread = -1; | |
576 | default_action = resume_info[i]; | |
577 | ||
578 | /* Note: we don't increment i here, we'll overwrite this entry | |
579 | the next time through. */ | |
580 | } | |
581 | else if (p[0] == ':') | |
582 | { | |
a06660f7 DJ |
583 | unsigned int gdb_id = strtoul (p + 1, &q, 16); |
584 | unsigned long thread_id; | |
585 | ||
64386c31 DJ |
586 | if (p == q) |
587 | goto err; | |
588 | p = q; | |
589 | if (p[0] != ';' && p[0] != 0) | |
590 | goto err; | |
591 | ||
a06660f7 DJ |
592 | thread_id = gdb_id_to_thread_id (gdb_id); |
593 | if (thread_id) | |
594 | resume_info[i].thread = thread_id; | |
595 | else | |
596 | goto err; | |
597 | ||
64386c31 DJ |
598 | i++; |
599 | } | |
600 | } | |
601 | ||
602 | resume_info[i] = default_action; | |
603 | ||
604 | /* Still used in occasional places in the backend. */ | |
605 | if (n == 1 && resume_info[0].thread != -1) | |
606 | cont_thread = resume_info[0].thread; | |
607 | else | |
608 | cont_thread = -1; | |
dc3f8883 | 609 | set_desired_inferior (0); |
64386c31 DJ |
610 | |
611 | (*the_target->resume) (resume_info); | |
612 | ||
613 | free (resume_info); | |
614 | ||
615 | *signal = mywait (status, 1); | |
616 | prepare_resume_reply (own_buf, *status, *signal); | |
617 | return; | |
618 | ||
619 | err: | |
620 | /* No other way to report an error... */ | |
621 | strcpy (own_buf, ""); | |
622 | free (resume_info); | |
623 | return; | |
624 | } | |
625 | ||
626 | /* Handle all of the extended 'v' packets. */ | |
627 | void | |
fc620387 | 628 | handle_v_requests (char *own_buf, char *status, int *signal) |
64386c31 DJ |
629 | { |
630 | if (strncmp (own_buf, "vCont;", 6) == 0) | |
631 | { | |
632 | handle_v_cont (own_buf, status, signal); | |
633 | return; | |
634 | } | |
635 | ||
636 | if (strncmp (own_buf, "vCont?", 6) == 0) | |
637 | { | |
638 | strcpy (own_buf, "vCont;c;C;s;S"); | |
639 | return; | |
640 | } | |
641 | ||
642 | /* Otherwise we didn't know what packet it was. Say we didn't | |
643 | understand it. */ | |
644 | own_buf[0] = 0; | |
645 | return; | |
646 | } | |
647 | ||
648 | void | |
649 | myresume (int step, int sig) | |
650 | { | |
651 | struct thread_resume resume_info[2]; | |
652 | int n = 0; | |
653 | ||
d592fa2f | 654 | if (step || sig || (cont_thread != 0 && cont_thread != -1)) |
64386c31 DJ |
655 | { |
656 | resume_info[0].thread | |
657 | = ((struct inferior_list_entry *) current_inferior)->id; | |
658 | resume_info[0].step = step; | |
659 | resume_info[0].sig = sig; | |
660 | resume_info[0].leave_stopped = 0; | |
661 | n++; | |
662 | } | |
663 | resume_info[n].thread = -1; | |
664 | resume_info[n].step = 0; | |
665 | resume_info[n].sig = 0; | |
d592fa2f | 666 | resume_info[n].leave_stopped = (cont_thread != 0 && cont_thread != -1); |
64386c31 DJ |
667 | |
668 | (*the_target->resume) (resume_info); | |
669 | } | |
670 | ||
0729219d | 671 | static int attached; |
c906108c | 672 | |
dd24457d DJ |
673 | static void |
674 | gdbserver_version (void) | |
675 | { | |
676 | printf ("GNU gdbserver %s\n" | |
677 | "Copyright (C) 2006 Free Software Foundation, Inc.\n" | |
678 | "gdbserver is free software, covered by the GNU General Public License.\n" | |
679 | "This gdbserver was configured as \"%s\"\n", | |
680 | version, host_name); | |
681 | } | |
682 | ||
0bc68c49 DJ |
683 | static void |
684 | gdbserver_usage (void) | |
685 | { | |
dd24457d DJ |
686 | printf ("Usage:\tgdbserver COMM PROG [ARGS ...]\n" |
687 | "\tgdbserver COMM --attach PID\n" | |
688 | "\n" | |
689 | "COMM may either be a tty device (for serial debugging), or \n" | |
690 | "HOST:PORT to listen for a TCP connection.\n"); | |
0bc68c49 DJ |
691 | } |
692 | ||
c906108c | 693 | int |
da85418c | 694 | main (int argc, char *argv[]) |
c906108c | 695 | { |
f450004a | 696 | char ch, status, *own_buf; |
7fb85e41 | 697 | unsigned char *mem_buf; |
c906108c | 698 | int i = 0; |
fc620387 | 699 | int signal; |
c906108c SS |
700 | unsigned int len; |
701 | CORE_ADDR mem_addr; | |
0729219d DJ |
702 | int bad_attach; |
703 | int pid; | |
45b7b345 | 704 | char *arg_end; |
c906108c | 705 | |
dd24457d DJ |
706 | if (argc >= 2 && strcmp (argv[1], "--version") == 0) |
707 | { | |
708 | gdbserver_version (); | |
709 | exit (0); | |
710 | } | |
711 | ||
712 | if (argc >= 2 && strcmp (argv[1], "--help") == 0) | |
713 | { | |
714 | gdbserver_usage (); | |
715 | exit (0); | |
716 | } | |
717 | ||
c5aa993b | 718 | if (setjmp (toplevel)) |
c906108c | 719 | { |
c5aa993b JM |
720 | fprintf (stderr, "Exiting\n"); |
721 | exit (1); | |
c906108c SS |
722 | } |
723 | ||
0729219d DJ |
724 | bad_attach = 0; |
725 | pid = 0; | |
726 | attached = 0; | |
45b7b345 DJ |
727 | if (argc >= 3 && strcmp (argv[2], "--attach") == 0) |
728 | { | |
729 | if (argc == 4 | |
730 | && argv[3] != '\0' | |
731 | && (pid = strtoul (argv[3], &arg_end, 10)) != 0 | |
732 | && *arg_end == '\0') | |
733 | { | |
734 | ; | |
735 | } | |
736 | else | |
737 | bad_attach = 1; | |
738 | } | |
739 | ||
740 | if (argc < 3 || bad_attach) | |
dd24457d DJ |
741 | { |
742 | gdbserver_usage (); | |
743 | exit (1); | |
744 | } | |
c906108c | 745 | |
4ce44c66 JM |
746 | initialize_low (); |
747 | ||
0a30fbc4 | 748 | own_buf = malloc (PBUFSIZ); |
7fb85e41 | 749 | mem_buf = malloc (PBUFSIZ); |
0a30fbc4 | 750 | |
45b7b345 DJ |
751 | if (pid == 0) |
752 | { | |
753 | /* Wait till we are at first instruction in program. */ | |
754 | signal = start_inferior (&argv[2], &status); | |
c906108c | 755 | |
45b7b345 DJ |
756 | /* We are now stopped at the first instruction of the target process */ |
757 | } | |
758 | else | |
759 | { | |
760 | switch (attach_inferior (pid, &status, &signal)) | |
761 | { | |
762 | case -1: | |
763 | error ("Attaching not supported on this target"); | |
764 | break; | |
765 | default: | |
766 | attached = 1; | |
767 | break; | |
768 | } | |
769 | } | |
c906108c | 770 | |
8264bb58 DJ |
771 | if (setjmp (toplevel)) |
772 | { | |
773 | fprintf (stderr, "Killing inferior\n"); | |
774 | kill_inferior (); | |
775 | exit (1); | |
776 | } | |
777 | ||
c906108c SS |
778 | while (1) |
779 | { | |
780 | remote_open (argv[1]); | |
781 | ||
c5aa993b JM |
782 | restart: |
783 | setjmp (toplevel); | |
01f9e8fa | 784 | while (1) |
c906108c SS |
785 | { |
786 | unsigned char sig; | |
01f9e8fa DJ |
787 | int packet_len; |
788 | int new_packet_len = -1; | |
789 | ||
790 | packet_len = getpkt (own_buf); | |
791 | if (packet_len <= 0) | |
792 | break; | |
793 | ||
c906108c SS |
794 | i = 0; |
795 | ch = own_buf[i++]; | |
796 | switch (ch) | |
797 | { | |
ce3a066d | 798 | case 'q': |
0876f84a | 799 | handle_query (own_buf, &new_packet_len); |
ce3a066d | 800 | break; |
89be2091 DJ |
801 | case 'Q': |
802 | handle_general_set (own_buf); | |
803 | break; | |
b80864fb DJ |
804 | #ifndef USE_WIN32API |
805 | /* Skip "detach" support on mingw32, since we don't have | |
806 | waitpid. */ | |
6ad8ae5c DJ |
807 | case 'D': |
808 | fprintf (stderr, "Detaching from inferior\n"); | |
809 | detach_inferior (); | |
810 | write_ok (own_buf); | |
811 | putpkt (own_buf); | |
aa691b87 | 812 | remote_close (); |
6ad8ae5c DJ |
813 | |
814 | /* If we are attached, then we can exit. Otherwise, we need to | |
815 | hang around doing nothing, until the child is gone. */ | |
816 | if (!attached) | |
817 | { | |
818 | int status, ret; | |
819 | ||
820 | do { | |
821 | ret = waitpid (signal_pid, &status, 0); | |
822 | if (WIFEXITED (status) || WIFSIGNALED (status)) | |
823 | break; | |
824 | } while (ret != -1 || errno != ECHILD); | |
825 | } | |
826 | ||
827 | exit (0); | |
b80864fb | 828 | #endif |
6ad8ae5c | 829 | |
c906108c | 830 | case '!': |
45b7b345 DJ |
831 | if (attached == 0) |
832 | { | |
833 | extended_protocol = 1; | |
834 | prepare_resume_reply (own_buf, status, signal); | |
835 | } | |
836 | else | |
837 | { | |
838 | /* We can not use the extended protocol if we are | |
839 | attached, because we can not restart the running | |
840 | program. So return unrecognized. */ | |
841 | own_buf[0] = '\0'; | |
842 | } | |
c906108c SS |
843 | break; |
844 | case '?': | |
845 | prepare_resume_reply (own_buf, status, signal); | |
846 | break; | |
847 | case 'H': | |
a06660f7 | 848 | if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's') |
c906108c | 849 | { |
a06660f7 DJ |
850 | unsigned long gdb_id, thread_id; |
851 | ||
852 | gdb_id = strtoul (&own_buf[2], NULL, 16); | |
853 | thread_id = gdb_id_to_thread_id (gdb_id); | |
854 | if (thread_id == 0) | |
855 | { | |
856 | write_enn (own_buf); | |
857 | break; | |
858 | } | |
859 | ||
860 | if (own_buf[1] == 'g') | |
861 | { | |
862 | general_thread = thread_id; | |
863 | set_desired_inferior (1); | |
864 | } | |
865 | else if (own_buf[1] == 'c') | |
866 | cont_thread = thread_id; | |
867 | else if (own_buf[1] == 's') | |
868 | step_thread = thread_id; | |
869 | ||
0d62e5e8 | 870 | write_ok (own_buf); |
a06660f7 DJ |
871 | } |
872 | else | |
873 | { | |
c906108c SS |
874 | /* Silently ignore it so that gdb can extend the protocol |
875 | without compatibility headaches. */ | |
876 | own_buf[0] = '\0'; | |
c906108c SS |
877 | } |
878 | break; | |
879 | case 'g': | |
0d62e5e8 | 880 | set_desired_inferior (1); |
0a30fbc4 | 881 | registers_to_string (own_buf); |
c906108c SS |
882 | break; |
883 | case 'G': | |
0d62e5e8 | 884 | set_desired_inferior (1); |
0a30fbc4 | 885 | registers_from_string (&own_buf[1]); |
c906108c SS |
886 | write_ok (own_buf); |
887 | break; | |
888 | case 'm': | |
889 | decode_m_packet (&own_buf[1], &mem_addr, &len); | |
c3e735a6 DJ |
890 | if (read_inferior_memory (mem_addr, mem_buf, len) == 0) |
891 | convert_int_to_ascii (mem_buf, own_buf, len); | |
892 | else | |
893 | write_enn (own_buf); | |
c906108c SS |
894 | break; |
895 | case 'M': | |
896 | decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf); | |
897 | if (write_inferior_memory (mem_addr, mem_buf, len) == 0) | |
898 | write_ok (own_buf); | |
899 | else | |
900 | write_enn (own_buf); | |
901 | break; | |
01f9e8fa DJ |
902 | case 'X': |
903 | if (decode_X_packet (&own_buf[1], packet_len - 1, | |
904 | &mem_addr, &len, mem_buf) < 0 | |
905 | || write_inferior_memory (mem_addr, mem_buf, len) != 0) | |
906 | write_enn (own_buf); | |
907 | else | |
908 | write_ok (own_buf); | |
909 | break; | |
c906108c SS |
910 | case 'C': |
911 | convert_ascii_to_int (own_buf + 1, &sig, 1); | |
0e98d0a7 DJ |
912 | if (target_signal_to_host_p (sig)) |
913 | signal = target_signal_to_host (sig); | |
914 | else | |
915 | signal = 0; | |
0d62e5e8 | 916 | set_desired_inferior (0); |
0e98d0a7 | 917 | myresume (0, signal); |
0d62e5e8 | 918 | signal = mywait (&status, 1); |
c906108c SS |
919 | prepare_resume_reply (own_buf, status, signal); |
920 | break; | |
921 | case 'S': | |
922 | convert_ascii_to_int (own_buf + 1, &sig, 1); | |
0e98d0a7 DJ |
923 | if (target_signal_to_host_p (sig)) |
924 | signal = target_signal_to_host (sig); | |
925 | else | |
926 | signal = 0; | |
0d62e5e8 | 927 | set_desired_inferior (0); |
0e98d0a7 | 928 | myresume (1, signal); |
0d62e5e8 | 929 | signal = mywait (&status, 1); |
c906108c SS |
930 | prepare_resume_reply (own_buf, status, signal); |
931 | break; | |
932 | case 'c': | |
0d62e5e8 | 933 | set_desired_inferior (0); |
c906108c | 934 | myresume (0, 0); |
0d62e5e8 | 935 | signal = mywait (&status, 1); |
c906108c SS |
936 | prepare_resume_reply (own_buf, status, signal); |
937 | break; | |
938 | case 's': | |
0d62e5e8 | 939 | set_desired_inferior (0); |
c906108c | 940 | myresume (1, 0); |
0d62e5e8 | 941 | signal = mywait (&status, 1); |
c906108c SS |
942 | prepare_resume_reply (own_buf, status, signal); |
943 | break; | |
e013ee27 OF |
944 | case 'Z': |
945 | { | |
946 | char *lenptr; | |
947 | char *dataptr; | |
948 | CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16); | |
949 | int len = strtol (lenptr + 1, &dataptr, 16); | |
950 | char type = own_buf[1]; | |
951 | ||
952 | if (the_target->insert_watchpoint == NULL | |
953 | || (type < '2' || type > '4')) | |
954 | { | |
955 | /* No watchpoint support or not a watchpoint command; | |
956 | unrecognized either way. */ | |
957 | own_buf[0] = '\0'; | |
958 | } | |
959 | else | |
960 | { | |
961 | int res; | |
962 | ||
963 | res = (*the_target->insert_watchpoint) (type, addr, len); | |
964 | if (res == 0) | |
965 | write_ok (own_buf); | |
966 | else if (res == 1) | |
967 | /* Unsupported. */ | |
968 | own_buf[0] = '\0'; | |
969 | else | |
970 | write_enn (own_buf); | |
971 | } | |
972 | break; | |
973 | } | |
974 | case 'z': | |
975 | { | |
976 | char *lenptr; | |
977 | char *dataptr; | |
978 | CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16); | |
979 | int len = strtol (lenptr + 1, &dataptr, 16); | |
980 | char type = own_buf[1]; | |
981 | ||
982 | if (the_target->remove_watchpoint == NULL | |
983 | || (type < '2' || type > '4')) | |
984 | { | |
985 | /* No watchpoint support or not a watchpoint command; | |
986 | unrecognized either way. */ | |
987 | own_buf[0] = '\0'; | |
988 | } | |
989 | else | |
990 | { | |
991 | int res; | |
992 | ||
993 | res = (*the_target->remove_watchpoint) (type, addr, len); | |
994 | if (res == 0) | |
995 | write_ok (own_buf); | |
996 | else if (res == 1) | |
997 | /* Unsupported. */ | |
998 | own_buf[0] = '\0'; | |
999 | else | |
1000 | write_enn (own_buf); | |
1001 | } | |
1002 | break; | |
1003 | } | |
c906108c SS |
1004 | case 'k': |
1005 | fprintf (stderr, "Killing inferior\n"); | |
1006 | kill_inferior (); | |
1007 | /* When using the extended protocol, we start up a new | |
c5aa993b | 1008 | debugging session. The traditional protocol will |
c906108c SS |
1009 | exit instead. */ |
1010 | if (extended_protocol) | |
1011 | { | |
1012 | write_ok (own_buf); | |
1013 | fprintf (stderr, "GDBserver restarting\n"); | |
1014 | ||
1015 | /* Wait till we are at 1st instruction in prog. */ | |
1016 | signal = start_inferior (&argv[2], &status); | |
1017 | goto restart; | |
1018 | break; | |
1019 | } | |
1020 | else | |
1021 | { | |
1022 | exit (0); | |
1023 | break; | |
1024 | } | |
1025 | case 'T': | |
a06660f7 DJ |
1026 | { |
1027 | unsigned long gdb_id, thread_id; | |
1028 | ||
1029 | gdb_id = strtoul (&own_buf[1], NULL, 16); | |
1030 | thread_id = gdb_id_to_thread_id (gdb_id); | |
1031 | if (thread_id == 0) | |
1032 | { | |
1033 | write_enn (own_buf); | |
1034 | break; | |
1035 | } | |
1036 | ||
1037 | if (mythread_alive (thread_id)) | |
1038 | write_ok (own_buf); | |
1039 | else | |
1040 | write_enn (own_buf); | |
1041 | } | |
c906108c SS |
1042 | break; |
1043 | case 'R': | |
1044 | /* Restarting the inferior is only supported in the | |
c5aa993b | 1045 | extended protocol. */ |
c906108c SS |
1046 | if (extended_protocol) |
1047 | { | |
1048 | kill_inferior (); | |
1049 | write_ok (own_buf); | |
1050 | fprintf (stderr, "GDBserver restarting\n"); | |
1051 | ||
1052 | /* Wait till we are at 1st instruction in prog. */ | |
1053 | signal = start_inferior (&argv[2], &status); | |
1054 | goto restart; | |
1055 | break; | |
1056 | } | |
1057 | else | |
1058 | { | |
1059 | /* It is a request we don't understand. Respond with an | |
1060 | empty packet so that gdb knows that we don't support this | |
1061 | request. */ | |
1062 | own_buf[0] = '\0'; | |
1063 | break; | |
1064 | } | |
64386c31 DJ |
1065 | case 'v': |
1066 | /* Extended (long) request. */ | |
1067 | handle_v_requests (own_buf, &status, &signal); | |
1068 | break; | |
c906108c SS |
1069 | default: |
1070 | /* It is a request we don't understand. Respond with an | |
c5aa993b JM |
1071 | empty packet so that gdb knows that we don't support this |
1072 | request. */ | |
c906108c SS |
1073 | own_buf[0] = '\0'; |
1074 | break; | |
1075 | } | |
1076 | ||
01f9e8fa DJ |
1077 | if (new_packet_len != -1) |
1078 | putpkt_binary (own_buf, new_packet_len); | |
1079 | else | |
1080 | putpkt (own_buf); | |
c906108c SS |
1081 | |
1082 | if (status == 'W') | |
1083 | fprintf (stderr, | |
3a7fb99b | 1084 | "\nChild exited with status %d\n", signal); |
c906108c | 1085 | if (status == 'X') |
b80864fb DJ |
1086 | fprintf (stderr, "\nChild terminated with signal = 0x%x (%s)\n", |
1087 | target_signal_to_host (signal), | |
1088 | target_signal_to_name (signal)); | |
c906108c SS |
1089 | if (status == 'W' || status == 'X') |
1090 | { | |
1091 | if (extended_protocol) | |
1092 | { | |
1093 | fprintf (stderr, "Killing inferior\n"); | |
1094 | kill_inferior (); | |
1095 | write_ok (own_buf); | |
1096 | fprintf (stderr, "GDBserver restarting\n"); | |
1097 | ||
1098 | /* Wait till we are at 1st instruction in prog. */ | |
1099 | signal = start_inferior (&argv[2], &status); | |
1100 | goto restart; | |
1101 | break; | |
1102 | } | |
1103 | else | |
1104 | { | |
1105 | fprintf (stderr, "GDBserver exiting\n"); | |
1106 | exit (0); | |
1107 | } | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | /* We come here when getpkt fails. | |
1112 | ||
c5aa993b JM |
1113 | For the extended remote protocol we exit (and this is the only |
1114 | way we gracefully exit!). | |
c906108c | 1115 | |
c5aa993b JM |
1116 | For the traditional remote protocol close the connection, |
1117 | and re-open it at the top of the loop. */ | |
c906108c SS |
1118 | if (extended_protocol) |
1119 | { | |
1120 | remote_close (); | |
1121 | exit (0); | |
1122 | } | |
1123 | else | |
1124 | { | |
45b7b345 DJ |
1125 | fprintf (stderr, "Remote side has terminated connection. " |
1126 | "GDBserver will reopen the connection.\n"); | |
c906108c SS |
1127 | remote_close (); |
1128 | } | |
1129 | } | |
1130 | } |