Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Remote utility routines for the remote server for GDB. |
0a30fbc4 | 2 | Copyright 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
a1928bad | 3 | 2002, 2003, 2004, 2005 |
b6ba6518 | 4 | Free Software Foundation, Inc. |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
22 | |
23 | #include "server.h" | |
24 | #include "terminal.h" | |
25 | #include <stdio.h> | |
26 | #include <string.h> | |
27 | #include <sys/ioctl.h> | |
28 | #include <sys/file.h> | |
29 | #include <netinet/in.h> | |
30 | #include <sys/socket.h> | |
31 | #include <netdb.h> | |
32 | #include <netinet/tcp.h> | |
33 | #include <sys/ioctl.h> | |
34 | #include <signal.h> | |
35 | #include <fcntl.h> | |
cf30a8e1 C |
36 | #include <sys/time.h> |
37 | #include <unistd.h> | |
0729219d | 38 | #include <arpa/inet.h> |
c906108c | 39 | |
f450004a DJ |
40 | #ifndef HAVE_SOCKLEN_T |
41 | typedef int socklen_t; | |
42 | #endif | |
43 | ||
fd500816 DJ |
44 | /* A cache entry for a successfully looked-up symbol. */ |
45 | struct sym_cache | |
46 | { | |
47 | const char *name; | |
48 | CORE_ADDR addr; | |
49 | struct sym_cache *next; | |
50 | }; | |
51 | ||
52 | /* The symbol cache. */ | |
53 | static struct sym_cache *symbol_cache; | |
54 | ||
c906108c | 55 | int remote_debug = 0; |
03863182 | 56 | struct ui_file *gdb_stdlog; |
c906108c SS |
57 | |
58 | static int remote_desc; | |
59 | ||
0d62e5e8 DJ |
60 | /* FIXME headerize? */ |
61 | extern int using_threads; | |
62 | extern int debug_threads; | |
63 | ||
c906108c SS |
64 | /* Open a connection to a remote debugger. |
65 | NAME is the filename used for communication. */ | |
66 | ||
67 | void | |
fba45db2 | 68 | remote_open (char *name) |
c906108c SS |
69 | { |
70 | int save_fcntl_flags; | |
e641a1ca | 71 | |
c906108c SS |
72 | if (!strchr (name, ':')) |
73 | { | |
74 | remote_desc = open (name, O_RDWR); | |
75 | if (remote_desc < 0) | |
76 | perror_with_name ("Could not open remote device"); | |
77 | ||
78 | #ifdef HAVE_TERMIOS | |
79 | { | |
80 | struct termios termios; | |
c5aa993b | 81 | tcgetattr (remote_desc, &termios); |
c906108c SS |
82 | |
83 | termios.c_iflag = 0; | |
84 | termios.c_oflag = 0; | |
85 | termios.c_lflag = 0; | |
c5aa993b | 86 | termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 87 | termios.c_cflag |= CLOCAL | CS8; |
d0608e50 | 88 | termios.c_cc[VMIN] = 1; |
c906108c SS |
89 | termios.c_cc[VTIME] = 0; |
90 | ||
c5aa993b | 91 | tcsetattr (remote_desc, TCSANOW, &termios); |
c906108c SS |
92 | } |
93 | #endif | |
94 | ||
95 | #ifdef HAVE_TERMIO | |
96 | { | |
97 | struct termio termio; | |
98 | ioctl (remote_desc, TCGETA, &termio); | |
99 | ||
100 | termio.c_iflag = 0; | |
101 | termio.c_oflag = 0; | |
102 | termio.c_lflag = 0; | |
c5aa993b | 103 | termio.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 104 | termio.c_cflag |= CLOCAL | CS8; |
d0608e50 | 105 | termio.c_cc[VMIN] = 1; |
c906108c SS |
106 | termio.c_cc[VTIME] = 0; |
107 | ||
108 | ioctl (remote_desc, TCSETA, &termio); | |
109 | } | |
110 | #endif | |
111 | ||
112 | #ifdef HAVE_SGTTY | |
113 | { | |
114 | struct sgttyb sg; | |
115 | ||
116 | ioctl (remote_desc, TIOCGETP, &sg); | |
117 | sg.sg_flags = RAW; | |
118 | ioctl (remote_desc, TIOCSETP, &sg); | |
119 | } | |
120 | #endif | |
121 | ||
e641a1ca | 122 | fprintf (stderr, "Remote debugging using %s\n", name); |
c906108c SS |
123 | } |
124 | else | |
125 | { | |
126 | char *port_str; | |
127 | int port; | |
128 | struct sockaddr_in sockaddr; | |
f450004a | 129 | socklen_t tmp; |
c906108c SS |
130 | int tmp_desc; |
131 | ||
132 | port_str = strchr (name, ':'); | |
133 | ||
134 | port = atoi (port_str + 1); | |
135 | ||
136 | tmp_desc = socket (PF_INET, SOCK_STREAM, 0); | |
137 | if (tmp_desc < 0) | |
138 | perror_with_name ("Can't open socket"); | |
139 | ||
140 | /* Allow rapid reuse of this port. */ | |
141 | tmp = 1; | |
c5aa993b JM |
142 | setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, |
143 | sizeof (tmp)); | |
c906108c SS |
144 | |
145 | sockaddr.sin_family = PF_INET; | |
c5aa993b | 146 | sockaddr.sin_port = htons (port); |
c906108c SS |
147 | sockaddr.sin_addr.s_addr = INADDR_ANY; |
148 | ||
c5aa993b | 149 | if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
c906108c SS |
150 | || listen (tmp_desc, 1)) |
151 | perror_with_name ("Can't bind address"); | |
152 | ||
6910d122 DJ |
153 | fprintf (stderr, "Listening on port %d\n", port); |
154 | ||
c906108c | 155 | tmp = sizeof (sockaddr); |
c5aa993b | 156 | remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp); |
c906108c SS |
157 | if (remote_desc == -1) |
158 | perror_with_name ("Accept failed"); | |
159 | ||
c906108c SS |
160 | /* Enable TCP keep alive process. */ |
161 | tmp = 1; | |
c5aa993b | 162 | setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp)); |
c906108c SS |
163 | |
164 | /* Tell TCP not to delay small packets. This greatly speeds up | |
c5aa993b | 165 | interactive response. */ |
c906108c | 166 | tmp = 1; |
373fe97f | 167 | setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY, |
c5aa993b | 168 | (char *) &tmp, sizeof (tmp)); |
c906108c SS |
169 | |
170 | close (tmp_desc); /* No longer need this */ | |
171 | ||
c5aa993b JM |
172 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply |
173 | exits when the remote side dies. */ | |
e641a1ca ML |
174 | |
175 | /* Convert IP address to string. */ | |
176 | fprintf (stderr, "Remote debugging from host %s\n", | |
177 | inet_ntoa (sockaddr.sin_addr)); | |
c906108c SS |
178 | } |
179 | ||
180 | #if defined(F_SETFL) && defined (FASYNC) | |
181 | save_fcntl_flags = fcntl (remote_desc, F_GETFL, 0); | |
182 | fcntl (remote_desc, F_SETFL, save_fcntl_flags | FASYNC); | |
cf30a8e1 C |
183 | #if defined (F_SETOWN) |
184 | fcntl (remote_desc, F_SETOWN, getpid ()); | |
94dfea5d | 185 | #endif |
cf30a8e1 | 186 | #endif |
c906108c | 187 | disable_async_io (); |
c906108c SS |
188 | } |
189 | ||
190 | void | |
fba45db2 | 191 | remote_close (void) |
c906108c SS |
192 | { |
193 | close (remote_desc); | |
194 | } | |
195 | ||
196 | /* Convert hex digit A to a number. */ | |
197 | ||
198 | static int | |
fba45db2 | 199 | fromhex (int a) |
c906108c SS |
200 | { |
201 | if (a >= '0' && a <= '9') | |
202 | return a - '0'; | |
203 | else if (a >= 'a' && a <= 'f') | |
204 | return a - 'a' + 10; | |
205 | else | |
206 | error ("Reply contains invalid hex digit"); | |
0a30fbc4 | 207 | return 0; |
c906108c SS |
208 | } |
209 | ||
ce3a066d DJ |
210 | int |
211 | unhexify (char *bin, const char *hex, int count) | |
212 | { | |
213 | int i; | |
214 | ||
215 | for (i = 0; i < count; i++) | |
216 | { | |
217 | if (hex[0] == 0 || hex[1] == 0) | |
218 | { | |
219 | /* Hex string is short, or of uneven length. | |
220 | Return the count that has been converted so far. */ | |
221 | return i; | |
222 | } | |
223 | *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); | |
224 | hex += 2; | |
225 | } | |
226 | return i; | |
227 | } | |
228 | ||
2f2893d9 DJ |
229 | static void |
230 | decode_address (CORE_ADDR *addrp, const char *start, int len) | |
231 | { | |
232 | CORE_ADDR addr; | |
233 | char ch; | |
234 | int i; | |
235 | ||
236 | addr = 0; | |
237 | for (i = 0; i < len; i++) | |
238 | { | |
239 | ch = start[i]; | |
240 | addr = addr << 4; | |
241 | addr = addr | (fromhex (ch) & 0x0f); | |
242 | } | |
243 | *addrp = addr; | |
244 | } | |
245 | ||
c906108c SS |
246 | /* Convert number NIB to a hex digit. */ |
247 | ||
248 | static int | |
fba45db2 | 249 | tohex (int nib) |
c906108c SS |
250 | { |
251 | if (nib < 10) | |
252 | return '0' + nib; | |
253 | else | |
254 | return 'a' + nib - 10; | |
255 | } | |
256 | ||
ce3a066d DJ |
257 | int |
258 | hexify (char *hex, const char *bin, int count) | |
259 | { | |
260 | int i; | |
261 | ||
262 | /* May use a length, or a nul-terminated string as input. */ | |
263 | if (count == 0) | |
264 | count = strlen (bin); | |
265 | ||
266 | for (i = 0; i < count; i++) | |
267 | { | |
268 | *hex++ = tohex ((*bin >> 4) & 0xf); | |
269 | *hex++ = tohex (*bin++ & 0xf); | |
270 | } | |
271 | *hex = 0; | |
272 | return i; | |
273 | } | |
274 | ||
c906108c SS |
275 | /* Send a packet to the remote machine, with error checking. |
276 | The data of the packet is in BUF. Returns >= 0 on success, -1 otherwise. */ | |
277 | ||
278 | int | |
fba45db2 | 279 | putpkt (char *buf) |
c906108c SS |
280 | { |
281 | int i; | |
282 | unsigned char csum = 0; | |
0a30fbc4 | 283 | char *buf2; |
c906108c SS |
284 | char buf3[1]; |
285 | int cnt = strlen (buf); | |
286 | char *p; | |
287 | ||
0a30fbc4 DJ |
288 | buf2 = malloc (PBUFSIZ); |
289 | ||
c906108c SS |
290 | /* Copy the packet into buffer BUF2, encapsulating it |
291 | and giving it a checksum. */ | |
292 | ||
293 | p = buf2; | |
294 | *p++ = '$'; | |
295 | ||
296 | for (i = 0; i < cnt; i++) | |
297 | { | |
298 | csum += buf[i]; | |
299 | *p++ = buf[i]; | |
300 | } | |
301 | *p++ = '#'; | |
302 | *p++ = tohex ((csum >> 4) & 0xf); | |
303 | *p++ = tohex (csum & 0xf); | |
304 | ||
305 | *p = '\0'; | |
306 | ||
307 | /* Send it over and over until we get a positive ack. */ | |
308 | ||
309 | do | |
310 | { | |
311 | int cc; | |
312 | ||
313 | if (write (remote_desc, buf2, p - buf2) != p - buf2) | |
314 | { | |
315 | perror ("putpkt(write)"); | |
316 | return -1; | |
317 | } | |
318 | ||
319 | if (remote_debug) | |
0d62e5e8 DJ |
320 | { |
321 | fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2); | |
322 | fflush (stderr); | |
323 | } | |
c906108c SS |
324 | cc = read (remote_desc, buf3, 1); |
325 | if (remote_debug) | |
0d62e5e8 DJ |
326 | { |
327 | fprintf (stderr, "[received '%c' (0x%x)]\n", buf3[0], buf3[0]); | |
328 | fflush (stderr); | |
329 | } | |
330 | ||
c906108c SS |
331 | if (cc <= 0) |
332 | { | |
333 | if (cc == 0) | |
334 | fprintf (stderr, "putpkt(read): Got EOF\n"); | |
335 | else | |
336 | perror ("putpkt(read)"); | |
337 | ||
0a30fbc4 | 338 | free (buf2); |
c906108c SS |
339 | return -1; |
340 | } | |
0d62e5e8 DJ |
341 | |
342 | /* Check for an input interrupt while we're here. */ | |
343 | if (buf3[0] == '\003') | |
e5379b03 | 344 | (*the_target->send_signal) (SIGINT); |
c906108c SS |
345 | } |
346 | while (buf3[0] != '+'); | |
347 | ||
0a30fbc4 | 348 | free (buf2); |
c906108c SS |
349 | return 1; /* Success! */ |
350 | } | |
351 | ||
352 | /* Come here when we get an input interrupt from the remote side. This | |
353 | interrupt should only be active while we are waiting for the child to do | |
354 | something. About the only thing that should come through is a ^C, which | |
355 | will cause us to send a SIGINT to the child. */ | |
356 | ||
357 | static void | |
0a30fbc4 | 358 | input_interrupt (int unused) |
c906108c | 359 | { |
cf30a8e1 C |
360 | fd_set readset; |
361 | struct timeval immediate = { 0, 0 }; | |
c906108c | 362 | |
cf30a8e1 C |
363 | /* Protect against spurious interrupts. This has been observed to |
364 | be a problem under NetBSD 1.4 and 1.5. */ | |
c906108c | 365 | |
cf30a8e1 C |
366 | FD_ZERO (&readset); |
367 | FD_SET (remote_desc, &readset); | |
368 | if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) | |
c906108c | 369 | { |
cf30a8e1 | 370 | int cc; |
fd500816 | 371 | char c = 0; |
cf30a8e1 C |
372 | |
373 | cc = read (remote_desc, &c, 1); | |
c906108c | 374 | |
cf30a8e1 C |
375 | if (cc != 1 || c != '\003') |
376 | { | |
fd500816 DJ |
377 | fprintf (stderr, "input_interrupt, count = %d c = %d ('%c')\n", |
378 | cc, c, c); | |
cf30a8e1 C |
379 | return; |
380 | } | |
381 | ||
e5379b03 | 382 | (*the_target->send_signal) (SIGINT); |
cf30a8e1 | 383 | } |
c906108c SS |
384 | } |
385 | ||
62ea82f5 DJ |
386 | void |
387 | block_async_io (void) | |
388 | { | |
389 | sigset_t sigio_set; | |
390 | sigemptyset (&sigio_set); | |
391 | sigaddset (&sigio_set, SIGIO); | |
392 | sigprocmask (SIG_BLOCK, &sigio_set, NULL); | |
393 | } | |
394 | ||
395 | void | |
396 | unblock_async_io (void) | |
397 | { | |
398 | sigset_t sigio_set; | |
399 | sigemptyset (&sigio_set); | |
400 | sigaddset (&sigio_set, SIGIO); | |
401 | sigprocmask (SIG_UNBLOCK, &sigio_set, NULL); | |
402 | } | |
403 | ||
fd500816 DJ |
404 | /* Asynchronous I/O support. SIGIO must be enabled when waiting, in order to |
405 | accept Control-C from the client, and must be disabled when talking to | |
406 | the client. */ | |
407 | ||
408 | /* Current state of asynchronous I/O. */ | |
409 | static int async_io_enabled; | |
410 | ||
411 | /* Enable asynchronous I/O. */ | |
c906108c | 412 | void |
fba45db2 | 413 | enable_async_io (void) |
c906108c | 414 | { |
fd500816 DJ |
415 | if (async_io_enabled) |
416 | return; | |
417 | ||
c906108c | 418 | signal (SIGIO, input_interrupt); |
fd500816 | 419 | async_io_enabled = 1; |
c906108c SS |
420 | } |
421 | ||
fd500816 | 422 | /* Disable asynchronous I/O. */ |
c906108c | 423 | void |
fba45db2 | 424 | disable_async_io (void) |
c906108c | 425 | { |
fd500816 DJ |
426 | if (!async_io_enabled) |
427 | return; | |
428 | ||
c906108c | 429 | signal (SIGIO, SIG_IGN); |
fd500816 | 430 | async_io_enabled = 0; |
c906108c SS |
431 | } |
432 | ||
433 | /* Returns next char from remote GDB. -1 if error. */ | |
434 | ||
435 | static int | |
fba45db2 | 436 | readchar (void) |
c906108c SS |
437 | { |
438 | static char buf[BUFSIZ]; | |
439 | static int bufcnt = 0; | |
440 | static char *bufp; | |
441 | ||
442 | if (bufcnt-- > 0) | |
443 | return *bufp++ & 0x7f; | |
444 | ||
445 | bufcnt = read (remote_desc, buf, sizeof (buf)); | |
446 | ||
447 | if (bufcnt <= 0) | |
448 | { | |
449 | if (bufcnt == 0) | |
450 | fprintf (stderr, "readchar: Got EOF\n"); | |
451 | else | |
452 | perror ("readchar"); | |
453 | ||
454 | return -1; | |
455 | } | |
456 | ||
457 | bufp = buf; | |
458 | bufcnt--; | |
459 | return *bufp++ & 0x7f; | |
460 | } | |
461 | ||
462 | /* Read a packet from the remote machine, with error checking, | |
463 | and store it in BUF. Returns length of packet, or negative if error. */ | |
464 | ||
465 | int | |
fba45db2 | 466 | getpkt (char *buf) |
c906108c SS |
467 | { |
468 | char *bp; | |
469 | unsigned char csum, c1, c2; | |
470 | int c; | |
471 | ||
472 | while (1) | |
473 | { | |
474 | csum = 0; | |
475 | ||
476 | while (1) | |
477 | { | |
478 | c = readchar (); | |
479 | if (c == '$') | |
480 | break; | |
481 | if (remote_debug) | |
0d62e5e8 DJ |
482 | { |
483 | fprintf (stderr, "[getpkt: discarding char '%c']\n", c); | |
484 | fflush (stderr); | |
485 | } | |
486 | ||
c906108c SS |
487 | if (c < 0) |
488 | return -1; | |
489 | } | |
490 | ||
491 | bp = buf; | |
492 | while (1) | |
493 | { | |
494 | c = readchar (); | |
495 | if (c < 0) | |
496 | return -1; | |
497 | if (c == '#') | |
498 | break; | |
499 | *bp++ = c; | |
500 | csum += c; | |
501 | } | |
502 | *bp = 0; | |
503 | ||
504 | c1 = fromhex (readchar ()); | |
505 | c2 = fromhex (readchar ()); | |
c5aa993b | 506 | |
c906108c SS |
507 | if (csum == (c1 << 4) + c2) |
508 | break; | |
509 | ||
510 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", | |
511 | (c1 << 4) + c2, csum, buf); | |
512 | write (remote_desc, "-", 1); | |
513 | } | |
514 | ||
515 | if (remote_debug) | |
0d62e5e8 DJ |
516 | { |
517 | fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf); | |
518 | fflush (stderr); | |
519 | } | |
c906108c SS |
520 | |
521 | write (remote_desc, "+", 1); | |
522 | ||
523 | if (remote_debug) | |
0d62e5e8 DJ |
524 | { |
525 | fprintf (stderr, "[sent ack]\n"); | |
526 | fflush (stderr); | |
527 | } | |
528 | ||
c906108c SS |
529 | return bp - buf; |
530 | } | |
531 | ||
532 | void | |
fba45db2 | 533 | write_ok (char *buf) |
c906108c SS |
534 | { |
535 | buf[0] = 'O'; | |
536 | buf[1] = 'K'; | |
537 | buf[2] = '\0'; | |
538 | } | |
539 | ||
540 | void | |
fba45db2 | 541 | write_enn (char *buf) |
c906108c | 542 | { |
c89dc5d4 | 543 | /* Some day, we should define the meanings of the error codes... */ |
c906108c | 544 | buf[0] = 'E'; |
c89dc5d4 DJ |
545 | buf[1] = '0'; |
546 | buf[2] = '1'; | |
c906108c SS |
547 | buf[3] = '\0'; |
548 | } | |
549 | ||
550 | void | |
f450004a | 551 | convert_int_to_ascii (unsigned char *from, char *to, int n) |
c906108c SS |
552 | { |
553 | int nib; | |
f450004a | 554 | int ch; |
c906108c SS |
555 | while (n--) |
556 | { | |
557 | ch = *from++; | |
558 | nib = ((ch & 0xf0) >> 4) & 0x0f; | |
559 | *to++ = tohex (nib); | |
560 | nib = ch & 0x0f; | |
561 | *to++ = tohex (nib); | |
562 | } | |
563 | *to++ = 0; | |
564 | } | |
565 | ||
566 | ||
567 | void | |
f450004a | 568 | convert_ascii_to_int (char *from, unsigned char *to, int n) |
c906108c SS |
569 | { |
570 | int nib1, nib2; | |
571 | while (n--) | |
572 | { | |
573 | nib1 = fromhex (*from++); | |
574 | nib2 = fromhex (*from++); | |
575 | *to++ = (((nib1 & 0x0f) << 4) & 0xf0) | (nib2 & 0x0f); | |
576 | } | |
577 | } | |
578 | ||
579 | static char * | |
fba45db2 | 580 | outreg (int regno, char *buf) |
c906108c | 581 | { |
5c44784c JM |
582 | if ((regno >> 12) != 0) |
583 | *buf++ = tohex ((regno >> 12) & 0xf); | |
584 | if ((regno >> 8) != 0) | |
585 | *buf++ = tohex ((regno >> 8) & 0xf); | |
586 | *buf++ = tohex ((regno >> 4) & 0xf); | |
c906108c SS |
587 | *buf++ = tohex (regno & 0xf); |
588 | *buf++ = ':'; | |
0d62e5e8 DJ |
589 | collect_register_as_string (regno, buf); |
590 | buf += 2 * register_size (regno); | |
c906108c SS |
591 | *buf++ = ';'; |
592 | ||
593 | return buf; | |
594 | } | |
595 | ||
0d62e5e8 DJ |
596 | void |
597 | new_thread_notify (int id) | |
598 | { | |
599 | char own_buf[256]; | |
600 | ||
601 | /* The `n' response is not yet part of the remote protocol. Do nothing. */ | |
602 | if (1) | |
603 | return; | |
604 | ||
605 | if (server_waiting == 0) | |
606 | return; | |
607 | ||
608 | sprintf (own_buf, "n%x", id); | |
609 | disable_async_io (); | |
610 | putpkt (own_buf); | |
611 | enable_async_io (); | |
612 | } | |
613 | ||
614 | void | |
615 | dead_thread_notify (int id) | |
616 | { | |
617 | char own_buf[256]; | |
618 | ||
619 | /* The `x' response is not yet part of the remote protocol. Do nothing. */ | |
620 | if (1) | |
621 | return; | |
622 | ||
623 | sprintf (own_buf, "x%x", id); | |
624 | disable_async_io (); | |
625 | putpkt (own_buf); | |
626 | enable_async_io (); | |
627 | } | |
628 | ||
c906108c | 629 | void |
fba45db2 | 630 | prepare_resume_reply (char *buf, char status, unsigned char signo) |
c906108c | 631 | { |
0e98d0a7 | 632 | int nib, sig; |
c906108c SS |
633 | |
634 | *buf++ = status; | |
635 | ||
0e98d0a7 DJ |
636 | sig = (int)target_signal_from_host (signo); |
637 | ||
638 | nib = ((sig & 0xf0) >> 4); | |
c906108c | 639 | *buf++ = tohex (nib); |
0e98d0a7 | 640 | nib = sig & 0x0f; |
c906108c SS |
641 | *buf++ = tohex (nib); |
642 | ||
643 | if (status == 'T') | |
644 | { | |
0a30fbc4 | 645 | const char **regp = gdbserver_expedite_regs; |
e013ee27 OF |
646 | |
647 | if (the_target->stopped_by_watchpoint != NULL | |
648 | && (*the_target->stopped_by_watchpoint) ()) | |
649 | { | |
650 | CORE_ADDR addr; | |
651 | int i; | |
652 | ||
653 | strncpy (buf, "watch:", 6); | |
654 | buf += 6; | |
655 | ||
656 | addr = (*the_target->stopped_data_address) (); | |
657 | ||
658 | /* Convert each byte of the address into two hexadecimal chars. | |
659 | Note that we take sizeof (void *) instead of sizeof (addr); | |
660 | this is to avoid sending a 64-bit address to a 32-bit GDB. */ | |
661 | for (i = sizeof (void *) * 2; i > 0; i--) | |
662 | { | |
663 | *buf++ = tohex ((addr >> (i - 1) * 4) & 0xf); | |
664 | } | |
665 | *buf++ = ';'; | |
666 | } | |
667 | ||
0a30fbc4 | 668 | while (*regp) |
5c44784c | 669 | { |
0a30fbc4 DJ |
670 | buf = outreg (find_regno (*regp), buf); |
671 | regp ++; | |
5c44784c | 672 | } |
c906108c | 673 | |
0d62e5e8 DJ |
674 | /* Formerly, if the debugger had not used any thread features we would not |
675 | burden it with a thread status response. This was for the benefit of | |
676 | GDB 4.13 and older. However, in recent GDB versions the check | |
677 | (``if (cont_thread != 0)'') does not have the desired effect because of | |
678 | sillyness in the way that the remote protocol handles specifying a thread. | |
679 | Since thread support relies on qSymbol support anyway, assume GDB can handle | |
680 | threads. */ | |
681 | ||
682 | if (using_threads) | |
c906108c | 683 | { |
0d62e5e8 DJ |
684 | /* FIXME right place to set this? */ |
685 | thread_from_wait = ((struct inferior_list_entry *)current_inferior)->id; | |
a06660f7 DJ |
686 | unsigned int gdb_id_from_wait = thread_to_gdb_id (current_inferior); |
687 | ||
0d62e5e8 | 688 | if (debug_threads) |
a1928bad | 689 | fprintf (stderr, "Writing resume reply for %ld\n\n", thread_from_wait); |
89a208da DJ |
690 | /* This if (1) ought to be unnecessary. But remote_wait in GDB |
691 | will claim this event belongs to inferior_ptid if we do not | |
692 | specify a thread, and there's no way for gdbserver to know | |
693 | what inferior_ptid is. */ | |
694 | if (1 || old_thread_from_wait != thread_from_wait) | |
c906108c | 695 | { |
0d62e5e8 | 696 | general_thread = thread_from_wait; |
a06660f7 | 697 | sprintf (buf, "thread:%x;", gdb_id_from_wait); |
c906108c SS |
698 | buf += strlen (buf); |
699 | old_thread_from_wait = thread_from_wait; | |
700 | } | |
701 | } | |
702 | } | |
703 | /* For W and X, we're done. */ | |
704 | *buf++ = 0; | |
705 | } | |
706 | ||
707 | void | |
fba45db2 | 708 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
c906108c SS |
709 | { |
710 | int i = 0, j = 0; | |
711 | char ch; | |
712 | *mem_addr_ptr = *len_ptr = 0; | |
713 | ||
714 | while ((ch = from[i++]) != ',') | |
715 | { | |
716 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
717 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
718 | } | |
719 | ||
720 | for (j = 0; j < 4; j++) | |
721 | { | |
722 | if ((ch = from[i++]) == 0) | |
723 | break; | |
724 | *len_ptr = *len_ptr << 4; | |
725 | *len_ptr |= fromhex (ch) & 0x0f; | |
726 | } | |
727 | } | |
728 | ||
729 | void | |
fba45db2 | 730 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
f450004a | 731 | unsigned char *to) |
c906108c SS |
732 | { |
733 | int i = 0; | |
734 | char ch; | |
735 | *mem_addr_ptr = *len_ptr = 0; | |
736 | ||
737 | while ((ch = from[i++]) != ',') | |
738 | { | |
739 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
740 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
741 | } | |
742 | ||
743 | while ((ch = from[i++]) != ':') | |
744 | { | |
745 | *len_ptr = *len_ptr << 4; | |
746 | *len_ptr |= fromhex (ch) & 0x0f; | |
747 | } | |
748 | ||
749 | convert_ascii_to_int (&from[i++], to, *len_ptr); | |
750 | } | |
2f2893d9 | 751 | |
fd500816 DJ |
752 | /* Ask GDB for the address of NAME, and return it in ADDRP if found. |
753 | Returns 1 if the symbol is found, 0 if it is not, -1 on error. */ | |
754 | ||
2f2893d9 DJ |
755 | int |
756 | look_up_one_symbol (const char *name, CORE_ADDR *addrp) | |
757 | { | |
758 | char own_buf[266], *p, *q; | |
759 | int len; | |
fd500816 DJ |
760 | struct sym_cache *sym; |
761 | ||
762 | /* Check the cache first. */ | |
763 | for (sym = symbol_cache; sym; sym = sym->next) | |
764 | if (strcmp (name, sym->name) == 0) | |
765 | { | |
766 | *addrp = sym->addr; | |
767 | return 1; | |
768 | } | |
2f2893d9 DJ |
769 | |
770 | /* Send the request. */ | |
771 | strcpy (own_buf, "qSymbol:"); | |
772 | hexify (own_buf + strlen ("qSymbol:"), name, strlen (name)); | |
773 | if (putpkt (own_buf) < 0) | |
774 | return -1; | |
775 | ||
776 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
777 | len = getpkt (own_buf); | |
778 | if (len < 0) | |
779 | return -1; | |
780 | ||
781 | if (strncmp (own_buf, "qSymbol:", strlen ("qSymbol:")) != 0) | |
782 | { | |
783 | /* Malformed response. */ | |
784 | if (remote_debug) | |
0d62e5e8 DJ |
785 | { |
786 | fprintf (stderr, "Malformed response to qSymbol, ignoring.\n"); | |
787 | fflush (stderr); | |
788 | } | |
789 | ||
2f2893d9 DJ |
790 | return -1; |
791 | } | |
792 | ||
793 | p = own_buf + strlen ("qSymbol:"); | |
794 | q = p; | |
795 | while (*q && *q != ':') | |
796 | q++; | |
797 | ||
798 | /* Make sure we found a value for the symbol. */ | |
799 | if (p == q || *q == '\0') | |
800 | return 0; | |
801 | ||
802 | decode_address (addrp, p, q - p); | |
fd500816 DJ |
803 | |
804 | /* Save the symbol in our cache. */ | |
805 | sym = malloc (sizeof (*sym)); | |
806 | sym->name = strdup (name); | |
807 | sym->addr = *addrp; | |
808 | sym->next = symbol_cache; | |
809 | symbol_cache = sym; | |
810 | ||
2f2893d9 DJ |
811 | return 1; |
812 | } |