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Commit | Line | Data |
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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 | |
148 | write_qxfer_response (char *buf, unsigned char *data, int len, int is_more) | |
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 | ||
ce3a066d DJ |
195 | /* Handle all of the extended 'q' packets. */ |
196 | void | |
0876f84a | 197 | handle_query (char *own_buf, int *new_packet_len_p) |
ce3a066d | 198 | { |
0d62e5e8 DJ |
199 | static struct inferior_list_entry *thread_ptr; |
200 | ||
ce3a066d DJ |
201 | if (strcmp ("qSymbol::", own_buf) == 0) |
202 | { | |
2f2893d9 DJ |
203 | if (the_target->look_up_symbols != NULL) |
204 | (*the_target->look_up_symbols) (); | |
205 | ||
ce3a066d DJ |
206 | strcpy (own_buf, "OK"); |
207 | return; | |
208 | } | |
209 | ||
0d62e5e8 DJ |
210 | if (strcmp ("qfThreadInfo", own_buf) == 0) |
211 | { | |
212 | thread_ptr = all_threads.head; | |
a06660f7 | 213 | sprintf (own_buf, "m%x", thread_to_gdb_id ((struct thread_info *)thread_ptr)); |
0d62e5e8 DJ |
214 | thread_ptr = thread_ptr->next; |
215 | return; | |
216 | } | |
aa691b87 | 217 | |
0d62e5e8 DJ |
218 | if (strcmp ("qsThreadInfo", own_buf) == 0) |
219 | { | |
220 | if (thread_ptr != NULL) | |
221 | { | |
a06660f7 | 222 | sprintf (own_buf, "m%x", thread_to_gdb_id ((struct thread_info *)thread_ptr)); |
0d62e5e8 DJ |
223 | thread_ptr = thread_ptr->next; |
224 | return; | |
225 | } | |
226 | else | |
227 | { | |
228 | sprintf (own_buf, "l"); | |
229 | return; | |
230 | } | |
231 | } | |
aa691b87 | 232 | |
52fb6437 NS |
233 | if (the_target->read_offsets != NULL |
234 | && strcmp ("qOffsets", own_buf) == 0) | |
235 | { | |
236 | CORE_ADDR text, data; | |
237 | ||
238 | if (the_target->read_offsets (&text, &data)) | |
239 | sprintf (own_buf, "Text=%lX;Data=%lX;Bss=%lX", | |
240 | (long)text, (long)data, (long)data); | |
241 | else | |
242 | write_enn (own_buf); | |
243 | ||
244 | return; | |
245 | } | |
246 | ||
aa691b87 | 247 | if (the_target->read_auxv != NULL |
0876f84a | 248 | && strncmp ("qXfer:auxv:read:", own_buf, 16) == 0) |
aa691b87 | 249 | { |
0876f84a DJ |
250 | unsigned char *data; |
251 | int n; | |
aa691b87 RM |
252 | CORE_ADDR ofs; |
253 | unsigned int len; | |
0876f84a DJ |
254 | char *annex; |
255 | ||
256 | /* Reject any annex; grab the offset and length. */ | |
257 | if (decode_xfer_read (own_buf + 16, &annex, &ofs, &len) < 0 | |
258 | || annex[0] != '\0') | |
259 | { | |
260 | strcpy (own_buf, "E00"); | |
261 | return; | |
262 | } | |
263 | ||
264 | /* Read one extra byte, as an indicator of whether there is | |
265 | more. */ | |
266 | if (len > PBUFSIZ - 2) | |
267 | len = PBUFSIZ - 2; | |
268 | data = malloc (len + 1); | |
269 | n = (*the_target->read_auxv) (ofs, data, len + 1); | |
000ef4f0 DJ |
270 | if (n < 0) |
271 | write_enn (own_buf); | |
272 | else if (n > len) | |
0876f84a | 273 | *new_packet_len_p = write_qxfer_response (own_buf, data, len, 1); |
aa691b87 | 274 | else |
0876f84a DJ |
275 | *new_packet_len_p = write_qxfer_response (own_buf, data, n, 0); |
276 | ||
277 | free (data); | |
278 | ||
aa691b87 RM |
279 | return; |
280 | } | |
281 | ||
be2a5f71 DJ |
282 | /* Protocol features query. */ |
283 | if (strncmp ("qSupported", own_buf, 10) == 0 | |
284 | && (own_buf[10] == ':' || own_buf[10] == '\0')) | |
285 | { | |
89be2091 | 286 | sprintf (own_buf, "PacketSize=%x;QPassSignals+", PBUFSIZ - 1); |
0876f84a DJ |
287 | |
288 | if (the_target->read_auxv != NULL) | |
9f2e1e63 | 289 | strcat (own_buf, ";qXfer:auxv:read+"); |
0876f84a | 290 | |
be2a5f71 DJ |
291 | return; |
292 | } | |
293 | ||
dae5f5cf DJ |
294 | /* Thread-local storage support. */ |
295 | if (the_target->get_tls_address != NULL | |
296 | && strncmp ("qGetTLSAddr:", own_buf, 12) == 0) | |
297 | { | |
298 | char *p = own_buf + 12; | |
299 | CORE_ADDR parts[3], address = 0; | |
300 | int i, err; | |
301 | ||
302 | for (i = 0; i < 3; i++) | |
303 | { | |
304 | char *p2; | |
305 | int len; | |
306 | ||
307 | if (p == NULL) | |
308 | break; | |
309 | ||
310 | p2 = strchr (p, ','); | |
311 | if (p2) | |
312 | { | |
313 | len = p2 - p; | |
314 | p2++; | |
315 | } | |
316 | else | |
317 | { | |
318 | len = strlen (p); | |
319 | p2 = NULL; | |
320 | } | |
321 | ||
322 | decode_address (&parts[i], p, len); | |
323 | p = p2; | |
324 | } | |
325 | ||
326 | if (p != NULL || i < 3) | |
327 | err = 1; | |
328 | else | |
329 | { | |
330 | struct thread_info *thread = gdb_id_to_thread (parts[0]); | |
331 | ||
332 | if (thread == NULL) | |
333 | err = 2; | |
334 | else | |
335 | err = the_target->get_tls_address (thread, parts[1], parts[2], | |
336 | &address); | |
337 | } | |
338 | ||
339 | if (err == 0) | |
340 | { | |
341 | sprintf (own_buf, "%llx", address); | |
342 | return; | |
343 | } | |
344 | else if (err > 0) | |
345 | { | |
346 | write_enn (own_buf); | |
347 | return; | |
348 | } | |
349 | ||
350 | /* Otherwise, pretend we do not understand this packet. */ | |
351 | } | |
352 | ||
ce3a066d DJ |
353 | /* Otherwise we didn't know what packet it was. Say we didn't |
354 | understand it. */ | |
355 | own_buf[0] = 0; | |
356 | } | |
357 | ||
64386c31 DJ |
358 | /* Parse vCont packets. */ |
359 | void | |
fc620387 | 360 | handle_v_cont (char *own_buf, char *status, int *signal) |
64386c31 DJ |
361 | { |
362 | char *p, *q; | |
363 | int n = 0, i = 0; | |
364 | struct thread_resume *resume_info, default_action; | |
365 | ||
366 | /* Count the number of semicolons in the packet. There should be one | |
367 | for every action. */ | |
368 | p = &own_buf[5]; | |
369 | while (p) | |
370 | { | |
371 | n++; | |
372 | p++; | |
373 | p = strchr (p, ';'); | |
374 | } | |
375 | /* Allocate room for one extra action, for the default remain-stopped | |
376 | behavior; if no default action is in the list, we'll need the extra | |
377 | slot. */ | |
378 | resume_info = malloc ((n + 1) * sizeof (resume_info[0])); | |
379 | ||
380 | default_action.thread = -1; | |
381 | default_action.leave_stopped = 1; | |
382 | default_action.step = 0; | |
383 | default_action.sig = 0; | |
384 | ||
385 | p = &own_buf[5]; | |
386 | i = 0; | |
387 | while (*p) | |
388 | { | |
389 | p++; | |
390 | ||
391 | resume_info[i].leave_stopped = 0; | |
392 | ||
393 | if (p[0] == 's' || p[0] == 'S') | |
394 | resume_info[i].step = 1; | |
395 | else if (p[0] == 'c' || p[0] == 'C') | |
396 | resume_info[i].step = 0; | |
397 | else | |
398 | goto err; | |
399 | ||
400 | if (p[0] == 'S' || p[0] == 'C') | |
401 | { | |
402 | int sig; | |
403 | sig = strtol (p + 1, &q, 16); | |
404 | if (p == q) | |
405 | goto err; | |
406 | p = q; | |
407 | ||
408 | if (!target_signal_to_host_p (sig)) | |
409 | goto err; | |
410 | resume_info[i].sig = target_signal_to_host (sig); | |
411 | } | |
412 | else | |
413 | { | |
414 | resume_info[i].sig = 0; | |
415 | p = p + 1; | |
416 | } | |
417 | ||
418 | if (p[0] == 0) | |
419 | { | |
420 | resume_info[i].thread = -1; | |
421 | default_action = resume_info[i]; | |
422 | ||
423 | /* Note: we don't increment i here, we'll overwrite this entry | |
424 | the next time through. */ | |
425 | } | |
426 | else if (p[0] == ':') | |
427 | { | |
a06660f7 DJ |
428 | unsigned int gdb_id = strtoul (p + 1, &q, 16); |
429 | unsigned long thread_id; | |
430 | ||
64386c31 DJ |
431 | if (p == q) |
432 | goto err; | |
433 | p = q; | |
434 | if (p[0] != ';' && p[0] != 0) | |
435 | goto err; | |
436 | ||
a06660f7 DJ |
437 | thread_id = gdb_id_to_thread_id (gdb_id); |
438 | if (thread_id) | |
439 | resume_info[i].thread = thread_id; | |
440 | else | |
441 | goto err; | |
442 | ||
64386c31 DJ |
443 | i++; |
444 | } | |
445 | } | |
446 | ||
447 | resume_info[i] = default_action; | |
448 | ||
449 | /* Still used in occasional places in the backend. */ | |
450 | if (n == 1 && resume_info[0].thread != -1) | |
451 | cont_thread = resume_info[0].thread; | |
452 | else | |
453 | cont_thread = -1; | |
dc3f8883 | 454 | set_desired_inferior (0); |
64386c31 DJ |
455 | |
456 | (*the_target->resume) (resume_info); | |
457 | ||
458 | free (resume_info); | |
459 | ||
460 | *signal = mywait (status, 1); | |
461 | prepare_resume_reply (own_buf, *status, *signal); | |
462 | return; | |
463 | ||
464 | err: | |
465 | /* No other way to report an error... */ | |
466 | strcpy (own_buf, ""); | |
467 | free (resume_info); | |
468 | return; | |
469 | } | |
470 | ||
471 | /* Handle all of the extended 'v' packets. */ | |
472 | void | |
fc620387 | 473 | handle_v_requests (char *own_buf, char *status, int *signal) |
64386c31 DJ |
474 | { |
475 | if (strncmp (own_buf, "vCont;", 6) == 0) | |
476 | { | |
477 | handle_v_cont (own_buf, status, signal); | |
478 | return; | |
479 | } | |
480 | ||
481 | if (strncmp (own_buf, "vCont?", 6) == 0) | |
482 | { | |
483 | strcpy (own_buf, "vCont;c;C;s;S"); | |
484 | return; | |
485 | } | |
486 | ||
487 | /* Otherwise we didn't know what packet it was. Say we didn't | |
488 | understand it. */ | |
489 | own_buf[0] = 0; | |
490 | return; | |
491 | } | |
492 | ||
493 | void | |
494 | myresume (int step, int sig) | |
495 | { | |
496 | struct thread_resume resume_info[2]; | |
497 | int n = 0; | |
498 | ||
d592fa2f | 499 | if (step || sig || (cont_thread != 0 && cont_thread != -1)) |
64386c31 DJ |
500 | { |
501 | resume_info[0].thread | |
502 | = ((struct inferior_list_entry *) current_inferior)->id; | |
503 | resume_info[0].step = step; | |
504 | resume_info[0].sig = sig; | |
505 | resume_info[0].leave_stopped = 0; | |
506 | n++; | |
507 | } | |
508 | resume_info[n].thread = -1; | |
509 | resume_info[n].step = 0; | |
510 | resume_info[n].sig = 0; | |
d592fa2f | 511 | resume_info[n].leave_stopped = (cont_thread != 0 && cont_thread != -1); |
64386c31 DJ |
512 | |
513 | (*the_target->resume) (resume_info); | |
514 | } | |
515 | ||
0729219d | 516 | static int attached; |
c906108c | 517 | |
dd24457d DJ |
518 | static void |
519 | gdbserver_version (void) | |
520 | { | |
521 | printf ("GNU gdbserver %s\n" | |
522 | "Copyright (C) 2006 Free Software Foundation, Inc.\n" | |
523 | "gdbserver is free software, covered by the GNU General Public License.\n" | |
524 | "This gdbserver was configured as \"%s\"\n", | |
525 | version, host_name); | |
526 | } | |
527 | ||
0bc68c49 DJ |
528 | static void |
529 | gdbserver_usage (void) | |
530 | { | |
dd24457d DJ |
531 | printf ("Usage:\tgdbserver COMM PROG [ARGS ...]\n" |
532 | "\tgdbserver COMM --attach PID\n" | |
533 | "\n" | |
534 | "COMM may either be a tty device (for serial debugging), or \n" | |
535 | "HOST:PORT to listen for a TCP connection.\n"); | |
0bc68c49 DJ |
536 | } |
537 | ||
c906108c | 538 | int |
da85418c | 539 | main (int argc, char *argv[]) |
c906108c | 540 | { |
f450004a | 541 | char ch, status, *own_buf; |
7fb85e41 | 542 | unsigned char *mem_buf; |
c906108c | 543 | int i = 0; |
fc620387 | 544 | int signal; |
c906108c SS |
545 | unsigned int len; |
546 | CORE_ADDR mem_addr; | |
0729219d DJ |
547 | int bad_attach; |
548 | int pid; | |
45b7b345 | 549 | char *arg_end; |
c906108c | 550 | |
dd24457d DJ |
551 | if (argc >= 2 && strcmp (argv[1], "--version") == 0) |
552 | { | |
553 | gdbserver_version (); | |
554 | exit (0); | |
555 | } | |
556 | ||
557 | if (argc >= 2 && strcmp (argv[1], "--help") == 0) | |
558 | { | |
559 | gdbserver_usage (); | |
560 | exit (0); | |
561 | } | |
562 | ||
c5aa993b | 563 | if (setjmp (toplevel)) |
c906108c | 564 | { |
c5aa993b JM |
565 | fprintf (stderr, "Exiting\n"); |
566 | exit (1); | |
c906108c SS |
567 | } |
568 | ||
0729219d DJ |
569 | bad_attach = 0; |
570 | pid = 0; | |
571 | attached = 0; | |
45b7b345 DJ |
572 | if (argc >= 3 && strcmp (argv[2], "--attach") == 0) |
573 | { | |
574 | if (argc == 4 | |
575 | && argv[3] != '\0' | |
576 | && (pid = strtoul (argv[3], &arg_end, 10)) != 0 | |
577 | && *arg_end == '\0') | |
578 | { | |
579 | ; | |
580 | } | |
581 | else | |
582 | bad_attach = 1; | |
583 | } | |
584 | ||
585 | if (argc < 3 || bad_attach) | |
dd24457d DJ |
586 | { |
587 | gdbserver_usage (); | |
588 | exit (1); | |
589 | } | |
c906108c | 590 | |
4ce44c66 JM |
591 | initialize_low (); |
592 | ||
0a30fbc4 | 593 | own_buf = malloc (PBUFSIZ); |
7fb85e41 | 594 | mem_buf = malloc (PBUFSIZ); |
0a30fbc4 | 595 | |
45b7b345 DJ |
596 | if (pid == 0) |
597 | { | |
598 | /* Wait till we are at first instruction in program. */ | |
599 | signal = start_inferior (&argv[2], &status); | |
c906108c | 600 | |
45b7b345 DJ |
601 | /* We are now stopped at the first instruction of the target process */ |
602 | } | |
603 | else | |
604 | { | |
605 | switch (attach_inferior (pid, &status, &signal)) | |
606 | { | |
607 | case -1: | |
608 | error ("Attaching not supported on this target"); | |
609 | break; | |
610 | default: | |
611 | attached = 1; | |
612 | break; | |
613 | } | |
614 | } | |
c906108c | 615 | |
8264bb58 DJ |
616 | if (setjmp (toplevel)) |
617 | { | |
618 | fprintf (stderr, "Killing inferior\n"); | |
619 | kill_inferior (); | |
620 | exit (1); | |
621 | } | |
622 | ||
c906108c SS |
623 | while (1) |
624 | { | |
625 | remote_open (argv[1]); | |
626 | ||
c5aa993b JM |
627 | restart: |
628 | setjmp (toplevel); | |
01f9e8fa | 629 | while (1) |
c906108c SS |
630 | { |
631 | unsigned char sig; | |
01f9e8fa DJ |
632 | int packet_len; |
633 | int new_packet_len = -1; | |
634 | ||
635 | packet_len = getpkt (own_buf); | |
636 | if (packet_len <= 0) | |
637 | break; | |
638 | ||
c906108c SS |
639 | i = 0; |
640 | ch = own_buf[i++]; | |
641 | switch (ch) | |
642 | { | |
ce3a066d | 643 | case 'q': |
0876f84a | 644 | handle_query (own_buf, &new_packet_len); |
ce3a066d | 645 | break; |
89be2091 DJ |
646 | case 'Q': |
647 | handle_general_set (own_buf); | |
648 | break; | |
c906108c SS |
649 | case 'd': |
650 | remote_debug = !remote_debug; | |
651 | break; | |
b80864fb DJ |
652 | #ifndef USE_WIN32API |
653 | /* Skip "detach" support on mingw32, since we don't have | |
654 | waitpid. */ | |
6ad8ae5c DJ |
655 | case 'D': |
656 | fprintf (stderr, "Detaching from inferior\n"); | |
657 | detach_inferior (); | |
658 | write_ok (own_buf); | |
659 | putpkt (own_buf); | |
aa691b87 | 660 | remote_close (); |
6ad8ae5c DJ |
661 | |
662 | /* If we are attached, then we can exit. Otherwise, we need to | |
663 | hang around doing nothing, until the child is gone. */ | |
664 | if (!attached) | |
665 | { | |
666 | int status, ret; | |
667 | ||
668 | do { | |
669 | ret = waitpid (signal_pid, &status, 0); | |
670 | if (WIFEXITED (status) || WIFSIGNALED (status)) | |
671 | break; | |
672 | } while (ret != -1 || errno != ECHILD); | |
673 | } | |
674 | ||
675 | exit (0); | |
b80864fb | 676 | #endif |
6ad8ae5c | 677 | |
c906108c | 678 | case '!': |
45b7b345 DJ |
679 | if (attached == 0) |
680 | { | |
681 | extended_protocol = 1; | |
682 | prepare_resume_reply (own_buf, status, signal); | |
683 | } | |
684 | else | |
685 | { | |
686 | /* We can not use the extended protocol if we are | |
687 | attached, because we can not restart the running | |
688 | program. So return unrecognized. */ | |
689 | own_buf[0] = '\0'; | |
690 | } | |
c906108c SS |
691 | break; |
692 | case '?': | |
693 | prepare_resume_reply (own_buf, status, signal); | |
694 | break; | |
695 | case 'H': | |
a06660f7 | 696 | if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's') |
c906108c | 697 | { |
a06660f7 DJ |
698 | unsigned long gdb_id, thread_id; |
699 | ||
700 | gdb_id = strtoul (&own_buf[2], NULL, 16); | |
701 | thread_id = gdb_id_to_thread_id (gdb_id); | |
702 | if (thread_id == 0) | |
703 | { | |
704 | write_enn (own_buf); | |
705 | break; | |
706 | } | |
707 | ||
708 | if (own_buf[1] == 'g') | |
709 | { | |
710 | general_thread = thread_id; | |
711 | set_desired_inferior (1); | |
712 | } | |
713 | else if (own_buf[1] == 'c') | |
714 | cont_thread = thread_id; | |
715 | else if (own_buf[1] == 's') | |
716 | step_thread = thread_id; | |
717 | ||
0d62e5e8 | 718 | write_ok (own_buf); |
a06660f7 DJ |
719 | } |
720 | else | |
721 | { | |
c906108c SS |
722 | /* Silently ignore it so that gdb can extend the protocol |
723 | without compatibility headaches. */ | |
724 | own_buf[0] = '\0'; | |
c906108c SS |
725 | } |
726 | break; | |
727 | case 'g': | |
0d62e5e8 | 728 | set_desired_inferior (1); |
0a30fbc4 | 729 | registers_to_string (own_buf); |
c906108c SS |
730 | break; |
731 | case 'G': | |
0d62e5e8 | 732 | set_desired_inferior (1); |
0a30fbc4 | 733 | registers_from_string (&own_buf[1]); |
c906108c SS |
734 | write_ok (own_buf); |
735 | break; | |
736 | case 'm': | |
737 | decode_m_packet (&own_buf[1], &mem_addr, &len); | |
c3e735a6 DJ |
738 | if (read_inferior_memory (mem_addr, mem_buf, len) == 0) |
739 | convert_int_to_ascii (mem_buf, own_buf, len); | |
740 | else | |
741 | write_enn (own_buf); | |
c906108c SS |
742 | break; |
743 | case 'M': | |
744 | decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf); | |
745 | if (write_inferior_memory (mem_addr, mem_buf, len) == 0) | |
746 | write_ok (own_buf); | |
747 | else | |
748 | write_enn (own_buf); | |
749 | break; | |
01f9e8fa DJ |
750 | case 'X': |
751 | if (decode_X_packet (&own_buf[1], packet_len - 1, | |
752 | &mem_addr, &len, mem_buf) < 0 | |
753 | || write_inferior_memory (mem_addr, mem_buf, len) != 0) | |
754 | write_enn (own_buf); | |
755 | else | |
756 | write_ok (own_buf); | |
757 | break; | |
c906108c SS |
758 | case 'C': |
759 | convert_ascii_to_int (own_buf + 1, &sig, 1); | |
0e98d0a7 DJ |
760 | if (target_signal_to_host_p (sig)) |
761 | signal = target_signal_to_host (sig); | |
762 | else | |
763 | signal = 0; | |
0d62e5e8 | 764 | set_desired_inferior (0); |
0e98d0a7 | 765 | myresume (0, signal); |
0d62e5e8 | 766 | signal = mywait (&status, 1); |
c906108c SS |
767 | prepare_resume_reply (own_buf, status, signal); |
768 | break; | |
769 | case 'S': | |
770 | convert_ascii_to_int (own_buf + 1, &sig, 1); | |
0e98d0a7 DJ |
771 | if (target_signal_to_host_p (sig)) |
772 | signal = target_signal_to_host (sig); | |
773 | else | |
774 | signal = 0; | |
0d62e5e8 | 775 | set_desired_inferior (0); |
0e98d0a7 | 776 | myresume (1, signal); |
0d62e5e8 | 777 | signal = mywait (&status, 1); |
c906108c SS |
778 | prepare_resume_reply (own_buf, status, signal); |
779 | break; | |
780 | case 'c': | |
0d62e5e8 | 781 | set_desired_inferior (0); |
c906108c | 782 | myresume (0, 0); |
0d62e5e8 | 783 | signal = mywait (&status, 1); |
c906108c SS |
784 | prepare_resume_reply (own_buf, status, signal); |
785 | break; | |
786 | case 's': | |
0d62e5e8 | 787 | set_desired_inferior (0); |
c906108c | 788 | myresume (1, 0); |
0d62e5e8 | 789 | signal = mywait (&status, 1); |
c906108c SS |
790 | prepare_resume_reply (own_buf, status, signal); |
791 | break; | |
e013ee27 OF |
792 | case 'Z': |
793 | { | |
794 | char *lenptr; | |
795 | char *dataptr; | |
796 | CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16); | |
797 | int len = strtol (lenptr + 1, &dataptr, 16); | |
798 | char type = own_buf[1]; | |
799 | ||
800 | if (the_target->insert_watchpoint == NULL | |
801 | || (type < '2' || type > '4')) | |
802 | { | |
803 | /* No watchpoint support or not a watchpoint command; | |
804 | unrecognized either way. */ | |
805 | own_buf[0] = '\0'; | |
806 | } | |
807 | else | |
808 | { | |
809 | int res; | |
810 | ||
811 | res = (*the_target->insert_watchpoint) (type, addr, len); | |
812 | if (res == 0) | |
813 | write_ok (own_buf); | |
814 | else if (res == 1) | |
815 | /* Unsupported. */ | |
816 | own_buf[0] = '\0'; | |
817 | else | |
818 | write_enn (own_buf); | |
819 | } | |
820 | break; | |
821 | } | |
822 | case 'z': | |
823 | { | |
824 | char *lenptr; | |
825 | char *dataptr; | |
826 | CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16); | |
827 | int len = strtol (lenptr + 1, &dataptr, 16); | |
828 | char type = own_buf[1]; | |
829 | ||
830 | if (the_target->remove_watchpoint == NULL | |
831 | || (type < '2' || type > '4')) | |
832 | { | |
833 | /* No watchpoint support or not a watchpoint command; | |
834 | unrecognized either way. */ | |
835 | own_buf[0] = '\0'; | |
836 | } | |
837 | else | |
838 | { | |
839 | int res; | |
840 | ||
841 | res = (*the_target->remove_watchpoint) (type, addr, len); | |
842 | if (res == 0) | |
843 | write_ok (own_buf); | |
844 | else if (res == 1) | |
845 | /* Unsupported. */ | |
846 | own_buf[0] = '\0'; | |
847 | else | |
848 | write_enn (own_buf); | |
849 | } | |
850 | break; | |
851 | } | |
c906108c SS |
852 | case 'k': |
853 | fprintf (stderr, "Killing inferior\n"); | |
854 | kill_inferior (); | |
855 | /* When using the extended protocol, we start up a new | |
c5aa993b | 856 | debugging session. The traditional protocol will |
c906108c SS |
857 | exit instead. */ |
858 | if (extended_protocol) | |
859 | { | |
860 | write_ok (own_buf); | |
861 | fprintf (stderr, "GDBserver restarting\n"); | |
862 | ||
863 | /* Wait till we are at 1st instruction in prog. */ | |
864 | signal = start_inferior (&argv[2], &status); | |
865 | goto restart; | |
866 | break; | |
867 | } | |
868 | else | |
869 | { | |
870 | exit (0); | |
871 | break; | |
872 | } | |
873 | case 'T': | |
a06660f7 DJ |
874 | { |
875 | unsigned long gdb_id, thread_id; | |
876 | ||
877 | gdb_id = strtoul (&own_buf[1], NULL, 16); | |
878 | thread_id = gdb_id_to_thread_id (gdb_id); | |
879 | if (thread_id == 0) | |
880 | { | |
881 | write_enn (own_buf); | |
882 | break; | |
883 | } | |
884 | ||
885 | if (mythread_alive (thread_id)) | |
886 | write_ok (own_buf); | |
887 | else | |
888 | write_enn (own_buf); | |
889 | } | |
c906108c SS |
890 | break; |
891 | case 'R': | |
892 | /* Restarting the inferior is only supported in the | |
c5aa993b | 893 | extended protocol. */ |
c906108c SS |
894 | if (extended_protocol) |
895 | { | |
896 | kill_inferior (); | |
897 | write_ok (own_buf); | |
898 | fprintf (stderr, "GDBserver restarting\n"); | |
899 | ||
900 | /* Wait till we are at 1st instruction in prog. */ | |
901 | signal = start_inferior (&argv[2], &status); | |
902 | goto restart; | |
903 | break; | |
904 | } | |
905 | else | |
906 | { | |
907 | /* It is a request we don't understand. Respond with an | |
908 | empty packet so that gdb knows that we don't support this | |
909 | request. */ | |
910 | own_buf[0] = '\0'; | |
911 | break; | |
912 | } | |
64386c31 DJ |
913 | case 'v': |
914 | /* Extended (long) request. */ | |
915 | handle_v_requests (own_buf, &status, &signal); | |
916 | break; | |
c906108c SS |
917 | default: |
918 | /* It is a request we don't understand. Respond with an | |
c5aa993b JM |
919 | empty packet so that gdb knows that we don't support this |
920 | request. */ | |
c906108c SS |
921 | own_buf[0] = '\0'; |
922 | break; | |
923 | } | |
924 | ||
01f9e8fa DJ |
925 | if (new_packet_len != -1) |
926 | putpkt_binary (own_buf, new_packet_len); | |
927 | else | |
928 | putpkt (own_buf); | |
c906108c SS |
929 | |
930 | if (status == 'W') | |
931 | fprintf (stderr, | |
3a7fb99b | 932 | "\nChild exited with status %d\n", signal); |
c906108c | 933 | if (status == 'X') |
b80864fb DJ |
934 | fprintf (stderr, "\nChild terminated with signal = 0x%x (%s)\n", |
935 | target_signal_to_host (signal), | |
936 | target_signal_to_name (signal)); | |
c906108c SS |
937 | if (status == 'W' || status == 'X') |
938 | { | |
939 | if (extended_protocol) | |
940 | { | |
941 | fprintf (stderr, "Killing inferior\n"); | |
942 | kill_inferior (); | |
943 | write_ok (own_buf); | |
944 | fprintf (stderr, "GDBserver restarting\n"); | |
945 | ||
946 | /* Wait till we are at 1st instruction in prog. */ | |
947 | signal = start_inferior (&argv[2], &status); | |
948 | goto restart; | |
949 | break; | |
950 | } | |
951 | else | |
952 | { | |
953 | fprintf (stderr, "GDBserver exiting\n"); | |
954 | exit (0); | |
955 | } | |
956 | } | |
957 | } | |
958 | ||
959 | /* We come here when getpkt fails. | |
960 | ||
c5aa993b JM |
961 | For the extended remote protocol we exit (and this is the only |
962 | way we gracefully exit!). | |
c906108c | 963 | |
c5aa993b JM |
964 | For the traditional remote protocol close the connection, |
965 | and re-open it at the top of the loop. */ | |
c906108c SS |
966 | if (extended_protocol) |
967 | { | |
968 | remote_close (); | |
969 | exit (0); | |
970 | } | |
971 | else | |
972 | { | |
45b7b345 DJ |
973 | fprintf (stderr, "Remote side has terminated connection. " |
974 | "GDBserver will reopen the connection.\n"); | |
c906108c SS |
975 | remote_close (); |
976 | } | |
977 | } | |
978 | } |