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