Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Remote utility routines for the remote server for GDB. |
6aba47ca | 2 | Copyright (C) 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
9b254dd1 DJ |
3 | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
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 | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 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 | 18 | You should have received a copy of the GNU General Public License |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
20 | |
21 | #include "server.h" | |
22 | #include "terminal.h" | |
23 | #include <stdio.h> | |
24 | #include <string.h> | |
b80864fb | 25 | #if HAVE_SYS_IOCTL_H |
c906108c | 26 | #include <sys/ioctl.h> |
b80864fb | 27 | #endif |
68070c10 | 28 | #if HAVE_SYS_FILE_H |
c906108c | 29 | #include <sys/file.h> |
68070c10 | 30 | #endif |
b80864fb | 31 | #if HAVE_NETINET_IN_H |
c906108c | 32 | #include <netinet/in.h> |
b80864fb DJ |
33 | #endif |
34 | #if HAVE_SYS_SOCKET_H | |
c906108c | 35 | #include <sys/socket.h> |
b80864fb DJ |
36 | #endif |
37 | #if HAVE_NETDB_H | |
c906108c | 38 | #include <netdb.h> |
b80864fb DJ |
39 | #endif |
40 | #if HAVE_NETINET_TCP_H | |
c906108c | 41 | #include <netinet/tcp.h> |
b80864fb DJ |
42 | #endif |
43 | #if HAVE_SYS_IOCTL_H | |
c906108c | 44 | #include <sys/ioctl.h> |
b80864fb | 45 | #endif |
68070c10 | 46 | #if HAVE_SIGNAL_H |
c906108c | 47 | #include <signal.h> |
68070c10 PA |
48 | #endif |
49 | #if HAVE_FCNTL_H | |
c906108c | 50 | #include <fcntl.h> |
68070c10 | 51 | #endif |
cf30a8e1 | 52 | #include <sys/time.h> |
68070c10 | 53 | #if HAVE_UNISTD_H |
cf30a8e1 | 54 | #include <unistd.h> |
68070c10 | 55 | #endif |
b80864fb | 56 | #if HAVE_ARPA_INET_H |
0729219d | 57 | #include <arpa/inet.h> |
b80864fb | 58 | #endif |
8264bb58 | 59 | #include <sys/stat.h> |
68070c10 | 60 | #if HAVE_ERRNO_H |
8264bb58 | 61 | #include <errno.h> |
68070c10 | 62 | #endif |
b80864fb DJ |
63 | |
64 | #if USE_WIN32API | |
65 | #include <winsock.h> | |
66 | #endif | |
c906108c | 67 | |
f450004a DJ |
68 | #ifndef HAVE_SOCKLEN_T |
69 | typedef int socklen_t; | |
70 | #endif | |
71 | ||
7390519e PA |
72 | #if USE_WIN32API |
73 | # define INVALID_DESCRIPTOR INVALID_SOCKET | |
74 | #else | |
75 | # define INVALID_DESCRIPTOR -1 | |
76 | #endif | |
77 | ||
fd500816 DJ |
78 | /* A cache entry for a successfully looked-up symbol. */ |
79 | struct sym_cache | |
80 | { | |
81 | const char *name; | |
82 | CORE_ADDR addr; | |
83 | struct sym_cache *next; | |
84 | }; | |
85 | ||
86 | /* The symbol cache. */ | |
87 | static struct sym_cache *symbol_cache; | |
88 | ||
ea025f5f DJ |
89 | /* If this flag has been set, assume cache misses are |
90 | failures. */ | |
91 | int all_symbols_looked_up; | |
92 | ||
c906108c | 93 | int remote_debug = 0; |
03863182 | 94 | struct ui_file *gdb_stdlog; |
c906108c | 95 | |
7390519e | 96 | static int remote_desc = INVALID_DESCRIPTOR; |
c906108c | 97 | |
0d62e5e8 DJ |
98 | /* FIXME headerize? */ |
99 | extern int using_threads; | |
100 | extern int debug_threads; | |
101 | ||
a6f3e723 SL |
102 | /* If true, then GDB has requested noack mode. */ |
103 | int noack_mode = 0; | |
104 | /* If true, then we tell GDB to use noack mode by default. */ | |
105 | int transport_is_reliable = 0; | |
106 | ||
0f48aa01 | 107 | #ifdef USE_WIN32API |
68070c10 PA |
108 | # define read(fd, buf, len) recv (fd, (char *) buf, len, 0) |
109 | # define write(fd, buf, len) send (fd, (char *) buf, len, 0) | |
0f48aa01 DJ |
110 | #endif |
111 | ||
c906108c SS |
112 | /* Open a connection to a remote debugger. |
113 | NAME is the filename used for communication. */ | |
114 | ||
115 | void | |
fba45db2 | 116 | remote_open (char *name) |
c906108c | 117 | { |
b80864fb | 118 | #if defined(F_SETFL) && defined (FASYNC) |
c906108c | 119 | int save_fcntl_flags; |
b80864fb | 120 | #endif |
8264bb58 DJ |
121 | char *port_str; |
122 | ||
123 | port_str = strchr (name, ':'); | |
124 | if (port_str == NULL) | |
c906108c | 125 | { |
b80864fb DJ |
126 | #ifdef USE_WIN32API |
127 | error ("Only <host>:<port> is supported on this platform."); | |
128 | #else | |
8264bb58 DJ |
129 | struct stat statbuf; |
130 | ||
131 | if (stat (name, &statbuf) == 0 | |
132 | && (S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode))) | |
133 | remote_desc = open (name, O_RDWR); | |
134 | else | |
135 | { | |
136 | errno = EINVAL; | |
137 | remote_desc = -1; | |
138 | } | |
139 | ||
c906108c SS |
140 | if (remote_desc < 0) |
141 | perror_with_name ("Could not open remote device"); | |
142 | ||
143 | #ifdef HAVE_TERMIOS | |
144 | { | |
145 | struct termios termios; | |
c5aa993b | 146 | tcgetattr (remote_desc, &termios); |
c906108c SS |
147 | |
148 | termios.c_iflag = 0; | |
149 | termios.c_oflag = 0; | |
150 | termios.c_lflag = 0; | |
c5aa993b | 151 | termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 152 | termios.c_cflag |= CLOCAL | CS8; |
d0608e50 | 153 | termios.c_cc[VMIN] = 1; |
c906108c SS |
154 | termios.c_cc[VTIME] = 0; |
155 | ||
c5aa993b | 156 | tcsetattr (remote_desc, TCSANOW, &termios); |
c906108c SS |
157 | } |
158 | #endif | |
159 | ||
160 | #ifdef HAVE_TERMIO | |
161 | { | |
162 | struct termio termio; | |
163 | ioctl (remote_desc, TCGETA, &termio); | |
164 | ||
165 | termio.c_iflag = 0; | |
166 | termio.c_oflag = 0; | |
167 | termio.c_lflag = 0; | |
c5aa993b | 168 | termio.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 169 | termio.c_cflag |= CLOCAL | CS8; |
d0608e50 | 170 | termio.c_cc[VMIN] = 1; |
c906108c SS |
171 | termio.c_cc[VTIME] = 0; |
172 | ||
173 | ioctl (remote_desc, TCSETA, &termio); | |
174 | } | |
175 | #endif | |
176 | ||
177 | #ifdef HAVE_SGTTY | |
178 | { | |
179 | struct sgttyb sg; | |
180 | ||
181 | ioctl (remote_desc, TIOCGETP, &sg); | |
182 | sg.sg_flags = RAW; | |
183 | ioctl (remote_desc, TIOCSETP, &sg); | |
184 | } | |
185 | #endif | |
186 | ||
e641a1ca | 187 | fprintf (stderr, "Remote debugging using %s\n", name); |
b80864fb | 188 | #endif /* USE_WIN32API */ |
a6f3e723 SL |
189 | |
190 | transport_is_reliable = 0; | |
c906108c SS |
191 | } |
192 | else | |
193 | { | |
b80864fb DJ |
194 | #ifdef USE_WIN32API |
195 | static int winsock_initialized; | |
196 | #endif | |
c906108c SS |
197 | int port; |
198 | struct sockaddr_in sockaddr; | |
f450004a | 199 | socklen_t tmp; |
c906108c | 200 | int tmp_desc; |
2d717e4f | 201 | char *port_end; |
c906108c | 202 | |
2d717e4f DJ |
203 | port = strtoul (port_str + 1, &port_end, 10); |
204 | if (port_str[1] == '\0' || *port_end != '\0') | |
205 | fatal ("Bad port argument: %s", name); | |
c906108c | 206 | |
b80864fb DJ |
207 | #ifdef USE_WIN32API |
208 | if (!winsock_initialized) | |
209 | { | |
210 | WSADATA wsad; | |
211 | ||
212 | WSAStartup (MAKEWORD (1, 0), &wsad); | |
213 | winsock_initialized = 1; | |
214 | } | |
215 | #endif | |
216 | ||
217 | tmp_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); | |
c906108c SS |
218 | if (tmp_desc < 0) |
219 | perror_with_name ("Can't open socket"); | |
220 | ||
221 | /* Allow rapid reuse of this port. */ | |
222 | tmp = 1; | |
c5aa993b JM |
223 | setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, |
224 | sizeof (tmp)); | |
c906108c SS |
225 | |
226 | sockaddr.sin_family = PF_INET; | |
c5aa993b | 227 | sockaddr.sin_port = htons (port); |
c906108c SS |
228 | sockaddr.sin_addr.s_addr = INADDR_ANY; |
229 | ||
c5aa993b | 230 | if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
c906108c SS |
231 | || listen (tmp_desc, 1)) |
232 | perror_with_name ("Can't bind address"); | |
233 | ||
6f8486da DJ |
234 | /* If port is zero, a random port will be selected, and the |
235 | fprintf below needs to know what port was selected. */ | |
236 | if (port == 0) | |
237 | { | |
238 | socklen_t len = sizeof (sockaddr); | |
239 | if (getsockname (tmp_desc, (struct sockaddr *) &sockaddr, &len) < 0 | |
240 | || len < sizeof (sockaddr)) | |
241 | perror_with_name ("Can't determine port"); | |
242 | port = ntohs (sockaddr.sin_port); | |
243 | } | |
244 | ||
6910d122 | 245 | fprintf (stderr, "Listening on port %d\n", port); |
b80864fb | 246 | fflush (stderr); |
6910d122 | 247 | |
c906108c | 248 | tmp = sizeof (sockaddr); |
c5aa993b | 249 | remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp); |
c906108c SS |
250 | if (remote_desc == -1) |
251 | perror_with_name ("Accept failed"); | |
252 | ||
c906108c SS |
253 | /* Enable TCP keep alive process. */ |
254 | tmp = 1; | |
aa0403d9 PA |
255 | setsockopt (remote_desc, SOL_SOCKET, SO_KEEPALIVE, |
256 | (char *) &tmp, sizeof (tmp)); | |
c906108c SS |
257 | |
258 | /* Tell TCP not to delay small packets. This greatly speeds up | |
c5aa993b | 259 | interactive response. */ |
c906108c | 260 | tmp = 1; |
373fe97f | 261 | setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY, |
c5aa993b | 262 | (char *) &tmp, sizeof (tmp)); |
c906108c | 263 | |
b80864fb DJ |
264 | |
265 | #ifndef USE_WIN32API | |
c906108c SS |
266 | close (tmp_desc); /* No longer need this */ |
267 | ||
c5aa993b JM |
268 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply |
269 | exits when the remote side dies. */ | |
b80864fb DJ |
270 | #else |
271 | closesocket (tmp_desc); /* No longer need this */ | |
272 | #endif | |
e641a1ca ML |
273 | |
274 | /* Convert IP address to string. */ | |
275 | fprintf (stderr, "Remote debugging from host %s\n", | |
276 | inet_ntoa (sockaddr.sin_addr)); | |
a6f3e723 SL |
277 | |
278 | transport_is_reliable = 1; | |
c906108c SS |
279 | } |
280 | ||
281 | #if defined(F_SETFL) && defined (FASYNC) | |
282 | save_fcntl_flags = fcntl (remote_desc, F_GETFL, 0); | |
283 | fcntl (remote_desc, F_SETFL, save_fcntl_flags | FASYNC); | |
cf30a8e1 C |
284 | #if defined (F_SETOWN) |
285 | fcntl (remote_desc, F_SETOWN, getpid ()); | |
94dfea5d | 286 | #endif |
cf30a8e1 | 287 | #endif |
c906108c SS |
288 | } |
289 | ||
290 | void | |
fba45db2 | 291 | remote_close (void) |
c906108c | 292 | { |
b80864fb DJ |
293 | #ifdef USE_WIN32API |
294 | closesocket (remote_desc); | |
295 | #else | |
c906108c | 296 | close (remote_desc); |
b80864fb | 297 | #endif |
c906108c SS |
298 | } |
299 | ||
300 | /* Convert hex digit A to a number. */ | |
301 | ||
302 | static int | |
fba45db2 | 303 | fromhex (int a) |
c906108c SS |
304 | { |
305 | if (a >= '0' && a <= '9') | |
306 | return a - '0'; | |
307 | else if (a >= 'a' && a <= 'f') | |
308 | return a - 'a' + 10; | |
309 | else | |
310 | error ("Reply contains invalid hex digit"); | |
0a30fbc4 | 311 | return 0; |
c906108c SS |
312 | } |
313 | ||
ce3a066d DJ |
314 | int |
315 | unhexify (char *bin, const char *hex, int count) | |
316 | { | |
317 | int i; | |
318 | ||
319 | for (i = 0; i < count; i++) | |
320 | { | |
321 | if (hex[0] == 0 || hex[1] == 0) | |
322 | { | |
323 | /* Hex string is short, or of uneven length. | |
324 | Return the count that has been converted so far. */ | |
325 | return i; | |
326 | } | |
327 | *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); | |
328 | hex += 2; | |
329 | } | |
330 | return i; | |
331 | } | |
332 | ||
dae5f5cf | 333 | void |
2f2893d9 DJ |
334 | decode_address (CORE_ADDR *addrp, const char *start, int len) |
335 | { | |
336 | CORE_ADDR addr; | |
337 | char ch; | |
338 | int i; | |
339 | ||
340 | addr = 0; | |
341 | for (i = 0; i < len; i++) | |
342 | { | |
343 | ch = start[i]; | |
344 | addr = addr << 4; | |
345 | addr = addr | (fromhex (ch) & 0x0f); | |
346 | } | |
347 | *addrp = addr; | |
348 | } | |
349 | ||
89be2091 DJ |
350 | const char * |
351 | decode_address_to_semicolon (CORE_ADDR *addrp, const char *start) | |
352 | { | |
353 | const char *end; | |
354 | ||
355 | end = start; | |
356 | while (*end != '\0' && *end != ';') | |
357 | end++; | |
358 | ||
359 | decode_address (addrp, start, end - start); | |
360 | ||
361 | if (*end == ';') | |
362 | end++; | |
363 | return end; | |
364 | } | |
365 | ||
c906108c SS |
366 | /* Convert number NIB to a hex digit. */ |
367 | ||
368 | static int | |
fba45db2 | 369 | tohex (int nib) |
c906108c SS |
370 | { |
371 | if (nib < 10) | |
372 | return '0' + nib; | |
373 | else | |
374 | return 'a' + nib - 10; | |
375 | } | |
376 | ||
ce3a066d DJ |
377 | int |
378 | hexify (char *hex, const char *bin, int count) | |
379 | { | |
380 | int i; | |
381 | ||
382 | /* May use a length, or a nul-terminated string as input. */ | |
383 | if (count == 0) | |
384 | count = strlen (bin); | |
385 | ||
386 | for (i = 0; i < count; i++) | |
387 | { | |
388 | *hex++ = tohex ((*bin >> 4) & 0xf); | |
389 | *hex++ = tohex (*bin++ & 0xf); | |
390 | } | |
391 | *hex = 0; | |
392 | return i; | |
393 | } | |
394 | ||
01f9e8fa DJ |
395 | /* Convert BUFFER, binary data at least LEN bytes long, into escaped |
396 | binary data in OUT_BUF. Set *OUT_LEN to the length of the data | |
397 | encoded in OUT_BUF, and return the number of bytes in OUT_BUF | |
398 | (which may be more than *OUT_LEN due to escape characters). The | |
399 | total number of bytes in the output buffer will be at most | |
400 | OUT_MAXLEN. */ | |
401 | ||
402 | int | |
403 | remote_escape_output (const gdb_byte *buffer, int len, | |
404 | gdb_byte *out_buf, int *out_len, | |
405 | int out_maxlen) | |
406 | { | |
407 | int input_index, output_index; | |
408 | ||
409 | output_index = 0; | |
410 | for (input_index = 0; input_index < len; input_index++) | |
411 | { | |
412 | gdb_byte b = buffer[input_index]; | |
413 | ||
414 | if (b == '$' || b == '#' || b == '}' || b == '*') | |
415 | { | |
416 | /* These must be escaped. */ | |
417 | if (output_index + 2 > out_maxlen) | |
418 | break; | |
419 | out_buf[output_index++] = '}'; | |
420 | out_buf[output_index++] = b ^ 0x20; | |
421 | } | |
422 | else | |
423 | { | |
424 | if (output_index + 1 > out_maxlen) | |
425 | break; | |
426 | out_buf[output_index++] = b; | |
427 | } | |
428 | } | |
429 | ||
430 | *out_len = input_index; | |
431 | return output_index; | |
432 | } | |
433 | ||
434 | /* Convert BUFFER, escaped data LEN bytes long, into binary data | |
435 | in OUT_BUF. Return the number of bytes written to OUT_BUF. | |
436 | Raise an error if the total number of bytes exceeds OUT_MAXLEN. | |
437 | ||
438 | This function reverses remote_escape_output. It allows more | |
439 | escaped characters than that function does, in particular because | |
440 | '*' must be escaped to avoid the run-length encoding processing | |
441 | in reading packets. */ | |
442 | ||
443 | static int | |
444 | remote_unescape_input (const gdb_byte *buffer, int len, | |
445 | gdb_byte *out_buf, int out_maxlen) | |
446 | { | |
447 | int input_index, output_index; | |
448 | int escaped; | |
449 | ||
450 | output_index = 0; | |
451 | escaped = 0; | |
452 | for (input_index = 0; input_index < len; input_index++) | |
453 | { | |
454 | gdb_byte b = buffer[input_index]; | |
455 | ||
456 | if (output_index + 1 > out_maxlen) | |
457 | error ("Received too much data from the target."); | |
458 | ||
459 | if (escaped) | |
460 | { | |
461 | out_buf[output_index++] = b ^ 0x20; | |
462 | escaped = 0; | |
463 | } | |
464 | else if (b == '}') | |
465 | escaped = 1; | |
466 | else | |
467 | out_buf[output_index++] = b; | |
468 | } | |
469 | ||
470 | if (escaped) | |
471 | error ("Unmatched escape character in target response."); | |
472 | ||
473 | return output_index; | |
474 | } | |
475 | ||
5ffff7c1 DJ |
476 | /* Look for a sequence of characters which can be run-length encoded. |
477 | If there are any, update *CSUM and *P. Otherwise, output the | |
478 | single character. Return the number of characters consumed. */ | |
479 | ||
480 | static int | |
481 | try_rle (char *buf, int remaining, unsigned char *csum, char **p) | |
482 | { | |
483 | int n; | |
484 | ||
485 | /* Always output the character. */ | |
486 | *csum += buf[0]; | |
487 | *(*p)++ = buf[0]; | |
488 | ||
489 | /* Don't go past '~'. */ | |
490 | if (remaining > 97) | |
491 | remaining = 97; | |
492 | ||
493 | for (n = 1; n < remaining; n++) | |
494 | if (buf[n] != buf[0]) | |
495 | break; | |
496 | ||
497 | /* N is the index of the first character not the same as buf[0]. | |
498 | buf[0] is counted twice, so by decrementing N, we get the number | |
499 | of characters the RLE sequence will replace. */ | |
500 | n--; | |
501 | ||
502 | if (n < 3) | |
503 | return 1; | |
504 | ||
505 | /* Skip the frame characters. The manual says to skip '+' and '-' | |
506 | also, but there's no reason to. Unfortunately these two unusable | |
507 | characters double the encoded length of a four byte zero | |
508 | value. */ | |
509 | while (n + 29 == '$' || n + 29 == '#') | |
510 | n--; | |
511 | ||
512 | *csum += '*'; | |
513 | *(*p)++ = '*'; | |
514 | *csum += n + 29; | |
515 | *(*p)++ = n + 29; | |
516 | ||
517 | return n + 1; | |
518 | } | |
519 | ||
c906108c | 520 | /* Send a packet to the remote machine, with error checking. |
01f9e8fa DJ |
521 | The data of the packet is in BUF, and the length of the |
522 | packet is in CNT. Returns >= 0 on success, -1 otherwise. */ | |
c906108c SS |
523 | |
524 | int | |
01f9e8fa | 525 | putpkt_binary (char *buf, int cnt) |
c906108c SS |
526 | { |
527 | int i; | |
528 | unsigned char csum = 0; | |
0a30fbc4 | 529 | char *buf2; |
c906108c | 530 | char buf3[1]; |
c906108c SS |
531 | char *p; |
532 | ||
0a30fbc4 DJ |
533 | buf2 = malloc (PBUFSIZ); |
534 | ||
c906108c SS |
535 | /* Copy the packet into buffer BUF2, encapsulating it |
536 | and giving it a checksum. */ | |
537 | ||
538 | p = buf2; | |
539 | *p++ = '$'; | |
540 | ||
5ffff7c1 DJ |
541 | for (i = 0; i < cnt;) |
542 | i += try_rle (buf + i, cnt - i, &csum, &p); | |
543 | ||
c906108c SS |
544 | *p++ = '#'; |
545 | *p++ = tohex ((csum >> 4) & 0xf); | |
546 | *p++ = tohex (csum & 0xf); | |
547 | ||
548 | *p = '\0'; | |
549 | ||
550 | /* Send it over and over until we get a positive ack. */ | |
551 | ||
552 | do | |
553 | { | |
554 | int cc; | |
555 | ||
0f48aa01 | 556 | if (write (remote_desc, buf2, p - buf2) != p - buf2) |
c906108c SS |
557 | { |
558 | perror ("putpkt(write)"); | |
f88c79e6 | 559 | free (buf2); |
c906108c SS |
560 | return -1; |
561 | } | |
562 | ||
a6f3e723 SL |
563 | if (noack_mode) |
564 | { | |
565 | /* Don't expect an ack then. */ | |
566 | if (remote_debug) | |
567 | { | |
568 | fprintf (stderr, "putpkt (\"%s\"); [noack mode]\n", buf2); | |
569 | fflush (stderr); | |
570 | } | |
571 | break; | |
572 | } | |
573 | ||
c906108c | 574 | if (remote_debug) |
0d62e5e8 DJ |
575 | { |
576 | fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2); | |
577 | fflush (stderr); | |
578 | } | |
0f48aa01 | 579 | cc = read (remote_desc, buf3, 1); |
c906108c | 580 | if (remote_debug) |
0d62e5e8 DJ |
581 | { |
582 | fprintf (stderr, "[received '%c' (0x%x)]\n", buf3[0], buf3[0]); | |
583 | fflush (stderr); | |
584 | } | |
585 | ||
c906108c SS |
586 | if (cc <= 0) |
587 | { | |
588 | if (cc == 0) | |
589 | fprintf (stderr, "putpkt(read): Got EOF\n"); | |
590 | else | |
591 | perror ("putpkt(read)"); | |
592 | ||
0a30fbc4 | 593 | free (buf2); |
c906108c SS |
594 | return -1; |
595 | } | |
0d62e5e8 DJ |
596 | |
597 | /* Check for an input interrupt while we're here. */ | |
2d717e4f | 598 | if (buf3[0] == '\003' && current_inferior != NULL) |
ef57601b | 599 | (*the_target->request_interrupt) (); |
c906108c SS |
600 | } |
601 | while (buf3[0] != '+'); | |
602 | ||
0a30fbc4 | 603 | free (buf2); |
c906108c SS |
604 | return 1; /* Success! */ |
605 | } | |
606 | ||
01f9e8fa DJ |
607 | /* Send a packet to the remote machine, with error checking. The data |
608 | of the packet is in BUF, and the packet should be a NUL-terminated | |
609 | string. Returns >= 0 on success, -1 otherwise. */ | |
610 | ||
611 | int | |
612 | putpkt (char *buf) | |
613 | { | |
614 | return putpkt_binary (buf, strlen (buf)); | |
615 | } | |
616 | ||
c906108c SS |
617 | /* Come here when we get an input interrupt from the remote side. This |
618 | interrupt should only be active while we are waiting for the child to do | |
619 | something. About the only thing that should come through is a ^C, which | |
ef57601b | 620 | will cause us to request child interruption. */ |
c906108c SS |
621 | |
622 | static void | |
0a30fbc4 | 623 | input_interrupt (int unused) |
c906108c | 624 | { |
cf30a8e1 C |
625 | fd_set readset; |
626 | struct timeval immediate = { 0, 0 }; | |
c906108c | 627 | |
cf30a8e1 C |
628 | /* Protect against spurious interrupts. This has been observed to |
629 | be a problem under NetBSD 1.4 and 1.5. */ | |
c906108c | 630 | |
cf30a8e1 C |
631 | FD_ZERO (&readset); |
632 | FD_SET (remote_desc, &readset); | |
633 | if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) | |
c906108c | 634 | { |
cf30a8e1 | 635 | int cc; |
fd500816 | 636 | char c = 0; |
7390519e | 637 | |
0f48aa01 | 638 | cc = read (remote_desc, &c, 1); |
c906108c | 639 | |
2d717e4f | 640 | if (cc != 1 || c != '\003' || current_inferior == NULL) |
cf30a8e1 | 641 | { |
fd500816 DJ |
642 | fprintf (stderr, "input_interrupt, count = %d c = %d ('%c')\n", |
643 | cc, c, c); | |
cf30a8e1 C |
644 | return; |
645 | } | |
7390519e | 646 | |
ef57601b | 647 | (*the_target->request_interrupt) (); |
cf30a8e1 | 648 | } |
c906108c | 649 | } |
7390519e PA |
650 | |
651 | /* Check if the remote side sent us an interrupt request (^C). */ | |
652 | void | |
653 | check_remote_input_interrupt_request (void) | |
654 | { | |
655 | /* This function may be called before establishing communications, | |
656 | therefore we need to validate the remote descriptor. */ | |
657 | ||
658 | if (remote_desc == INVALID_DESCRIPTOR) | |
659 | return; | |
660 | ||
661 | input_interrupt (0); | |
662 | } | |
b80864fb DJ |
663 | |
664 | /* Asynchronous I/O support. SIGIO must be enabled when waiting, in order to | |
665 | accept Control-C from the client, and must be disabled when talking to | |
666 | the client. */ | |
c906108c | 667 | |
a20d5e98 | 668 | static void |
62ea82f5 DJ |
669 | unblock_async_io (void) |
670 | { | |
b80864fb | 671 | #ifndef USE_WIN32API |
62ea82f5 | 672 | sigset_t sigio_set; |
a20d5e98 | 673 | |
62ea82f5 DJ |
674 | sigemptyset (&sigio_set); |
675 | sigaddset (&sigio_set, SIGIO); | |
676 | sigprocmask (SIG_UNBLOCK, &sigio_set, NULL); | |
b80864fb | 677 | #endif |
62ea82f5 DJ |
678 | } |
679 | ||
fd500816 DJ |
680 | /* Current state of asynchronous I/O. */ |
681 | static int async_io_enabled; | |
682 | ||
683 | /* Enable asynchronous I/O. */ | |
c906108c | 684 | void |
fba45db2 | 685 | enable_async_io (void) |
c906108c | 686 | { |
fd500816 DJ |
687 | if (async_io_enabled) |
688 | return; | |
689 | ||
b80864fb | 690 | #ifndef USE_WIN32API |
c906108c | 691 | signal (SIGIO, input_interrupt); |
b80864fb | 692 | #endif |
fd500816 | 693 | async_io_enabled = 1; |
c906108c SS |
694 | } |
695 | ||
fd500816 | 696 | /* Disable asynchronous I/O. */ |
c906108c | 697 | void |
fba45db2 | 698 | disable_async_io (void) |
c906108c | 699 | { |
fd500816 DJ |
700 | if (!async_io_enabled) |
701 | return; | |
702 | ||
b80864fb | 703 | #ifndef USE_WIN32API |
c906108c | 704 | signal (SIGIO, SIG_IGN); |
b80864fb | 705 | #endif |
fd500816 | 706 | async_io_enabled = 0; |
c906108c SS |
707 | } |
708 | ||
a20d5e98 DJ |
709 | void |
710 | initialize_async_io (void) | |
711 | { | |
712 | /* Make sure that async I/O starts disabled. */ | |
713 | async_io_enabled = 1; | |
714 | disable_async_io (); | |
715 | ||
716 | /* Make sure the signal is unblocked. */ | |
717 | unblock_async_io (); | |
718 | } | |
719 | ||
c906108c SS |
720 | /* Returns next char from remote GDB. -1 if error. */ |
721 | ||
722 | static int | |
fba45db2 | 723 | readchar (void) |
c906108c | 724 | { |
01f9e8fa | 725 | static unsigned char buf[BUFSIZ]; |
c906108c | 726 | static int bufcnt = 0; |
01f9e8fa | 727 | static unsigned char *bufp; |
c906108c SS |
728 | |
729 | if (bufcnt-- > 0) | |
01f9e8fa | 730 | return *bufp++; |
c906108c | 731 | |
0f48aa01 | 732 | bufcnt = read (remote_desc, buf, sizeof (buf)); |
c906108c SS |
733 | |
734 | if (bufcnt <= 0) | |
735 | { | |
736 | if (bufcnt == 0) | |
737 | fprintf (stderr, "readchar: Got EOF\n"); | |
738 | else | |
739 | perror ("readchar"); | |
740 | ||
741 | return -1; | |
742 | } | |
743 | ||
744 | bufp = buf; | |
745 | bufcnt--; | |
b79d787e | 746 | return *bufp++; |
c906108c SS |
747 | } |
748 | ||
749 | /* Read a packet from the remote machine, with error checking, | |
750 | and store it in BUF. Returns length of packet, or negative if error. */ | |
751 | ||
752 | int | |
fba45db2 | 753 | getpkt (char *buf) |
c906108c SS |
754 | { |
755 | char *bp; | |
756 | unsigned char csum, c1, c2; | |
757 | int c; | |
758 | ||
759 | while (1) | |
760 | { | |
761 | csum = 0; | |
762 | ||
763 | while (1) | |
764 | { | |
765 | c = readchar (); | |
766 | if (c == '$') | |
767 | break; | |
768 | if (remote_debug) | |
0d62e5e8 DJ |
769 | { |
770 | fprintf (stderr, "[getpkt: discarding char '%c']\n", c); | |
771 | fflush (stderr); | |
772 | } | |
773 | ||
c906108c SS |
774 | if (c < 0) |
775 | return -1; | |
776 | } | |
777 | ||
778 | bp = buf; | |
779 | while (1) | |
780 | { | |
781 | c = readchar (); | |
782 | if (c < 0) | |
783 | return -1; | |
784 | if (c == '#') | |
785 | break; | |
786 | *bp++ = c; | |
787 | csum += c; | |
788 | } | |
789 | *bp = 0; | |
790 | ||
791 | c1 = fromhex (readchar ()); | |
792 | c2 = fromhex (readchar ()); | |
c5aa993b | 793 | |
c906108c SS |
794 | if (csum == (c1 << 4) + c2) |
795 | break; | |
796 | ||
a6f3e723 SL |
797 | if (noack_mode) |
798 | { | |
799 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s [no-ack-mode, Bad medium?]\n", | |
800 | (c1 << 4) + c2, csum, buf); | |
801 | /* Not much we can do, GDB wasn't expecting an ack/nac. */ | |
802 | break; | |
803 | } | |
804 | ||
c906108c SS |
805 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", |
806 | (c1 << 4) + c2, csum, buf); | |
0f48aa01 | 807 | write (remote_desc, "-", 1); |
c906108c SS |
808 | } |
809 | ||
a6f3e723 | 810 | if (!noack_mode) |
0d62e5e8 | 811 | { |
a6f3e723 SL |
812 | if (remote_debug) |
813 | { | |
814 | fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf); | |
815 | fflush (stderr); | |
816 | } | |
c906108c | 817 | |
a6f3e723 | 818 | write (remote_desc, "+", 1); |
c906108c | 819 | |
a6f3e723 SL |
820 | if (remote_debug) |
821 | { | |
822 | fprintf (stderr, "[sent ack]\n"); | |
823 | fflush (stderr); | |
824 | } | |
0d62e5e8 DJ |
825 | } |
826 | ||
c906108c SS |
827 | return bp - buf; |
828 | } | |
829 | ||
830 | void | |
fba45db2 | 831 | write_ok (char *buf) |
c906108c SS |
832 | { |
833 | buf[0] = 'O'; | |
834 | buf[1] = 'K'; | |
835 | buf[2] = '\0'; | |
836 | } | |
837 | ||
838 | void | |
fba45db2 | 839 | write_enn (char *buf) |
c906108c | 840 | { |
c89dc5d4 | 841 | /* Some day, we should define the meanings of the error codes... */ |
c906108c | 842 | buf[0] = 'E'; |
c89dc5d4 DJ |
843 | buf[1] = '0'; |
844 | buf[2] = '1'; | |
c906108c SS |
845 | buf[3] = '\0'; |
846 | } | |
847 | ||
848 | void | |
f450004a | 849 | convert_int_to_ascii (unsigned char *from, char *to, int n) |
c906108c SS |
850 | { |
851 | int nib; | |
f450004a | 852 | int ch; |
c906108c SS |
853 | while (n--) |
854 | { | |
855 | ch = *from++; | |
856 | nib = ((ch & 0xf0) >> 4) & 0x0f; | |
857 | *to++ = tohex (nib); | |
858 | nib = ch & 0x0f; | |
859 | *to++ = tohex (nib); | |
860 | } | |
861 | *to++ = 0; | |
862 | } | |
863 | ||
864 | ||
865 | void | |
f450004a | 866 | convert_ascii_to_int (char *from, unsigned char *to, int n) |
c906108c SS |
867 | { |
868 | int nib1, nib2; | |
869 | while (n--) | |
870 | { | |
871 | nib1 = fromhex (*from++); | |
872 | nib2 = fromhex (*from++); | |
873 | *to++ = (((nib1 & 0x0f) << 4) & 0xf0) | (nib2 & 0x0f); | |
874 | } | |
875 | } | |
876 | ||
877 | static char * | |
fba45db2 | 878 | outreg (int regno, char *buf) |
c906108c | 879 | { |
5c44784c JM |
880 | if ((regno >> 12) != 0) |
881 | *buf++ = tohex ((regno >> 12) & 0xf); | |
882 | if ((regno >> 8) != 0) | |
883 | *buf++ = tohex ((regno >> 8) & 0xf); | |
884 | *buf++ = tohex ((regno >> 4) & 0xf); | |
c906108c SS |
885 | *buf++ = tohex (regno & 0xf); |
886 | *buf++ = ':'; | |
0d62e5e8 DJ |
887 | collect_register_as_string (regno, buf); |
888 | buf += 2 * register_size (regno); | |
c906108c SS |
889 | *buf++ = ';'; |
890 | ||
891 | return buf; | |
892 | } | |
893 | ||
0d62e5e8 DJ |
894 | void |
895 | new_thread_notify (int id) | |
896 | { | |
897 | char own_buf[256]; | |
898 | ||
899 | /* The `n' response is not yet part of the remote protocol. Do nothing. */ | |
900 | if (1) | |
901 | return; | |
902 | ||
903 | if (server_waiting == 0) | |
904 | return; | |
905 | ||
906 | sprintf (own_buf, "n%x", id); | |
907 | disable_async_io (); | |
908 | putpkt (own_buf); | |
909 | enable_async_io (); | |
910 | } | |
911 | ||
912 | void | |
913 | dead_thread_notify (int id) | |
914 | { | |
915 | char own_buf[256]; | |
916 | ||
917 | /* The `x' response is not yet part of the remote protocol. Do nothing. */ | |
918 | if (1) | |
919 | return; | |
920 | ||
921 | sprintf (own_buf, "x%x", id); | |
922 | disable_async_io (); | |
923 | putpkt (own_buf); | |
924 | enable_async_io (); | |
925 | } | |
926 | ||
c906108c | 927 | void |
b80864fb | 928 | prepare_resume_reply (char *buf, char status, unsigned char sig) |
c906108c | 929 | { |
b80864fb | 930 | int nib; |
c906108c SS |
931 | |
932 | *buf++ = status; | |
933 | ||
0e98d0a7 | 934 | nib = ((sig & 0xf0) >> 4); |
c906108c | 935 | *buf++ = tohex (nib); |
0e98d0a7 | 936 | nib = sig & 0x0f; |
c906108c SS |
937 | *buf++ = tohex (nib); |
938 | ||
939 | if (status == 'T') | |
940 | { | |
0a30fbc4 | 941 | const char **regp = gdbserver_expedite_regs; |
e013ee27 OF |
942 | |
943 | if (the_target->stopped_by_watchpoint != NULL | |
944 | && (*the_target->stopped_by_watchpoint) ()) | |
945 | { | |
946 | CORE_ADDR addr; | |
947 | int i; | |
948 | ||
949 | strncpy (buf, "watch:", 6); | |
950 | buf += 6; | |
951 | ||
952 | addr = (*the_target->stopped_data_address) (); | |
953 | ||
954 | /* Convert each byte of the address into two hexadecimal chars. | |
955 | Note that we take sizeof (void *) instead of sizeof (addr); | |
956 | this is to avoid sending a 64-bit address to a 32-bit GDB. */ | |
957 | for (i = sizeof (void *) * 2; i > 0; i--) | |
958 | { | |
959 | *buf++ = tohex ((addr >> (i - 1) * 4) & 0xf); | |
960 | } | |
961 | *buf++ = ';'; | |
962 | } | |
963 | ||
0a30fbc4 | 964 | while (*regp) |
5c44784c | 965 | { |
0a30fbc4 DJ |
966 | buf = outreg (find_regno (*regp), buf); |
967 | regp ++; | |
5c44784c | 968 | } |
c906108c | 969 | |
0d62e5e8 DJ |
970 | /* Formerly, if the debugger had not used any thread features we would not |
971 | burden it with a thread status response. This was for the benefit of | |
972 | GDB 4.13 and older. However, in recent GDB versions the check | |
973 | (``if (cont_thread != 0)'') does not have the desired effect because of | |
974 | sillyness in the way that the remote protocol handles specifying a thread. | |
975 | Since thread support relies on qSymbol support anyway, assume GDB can handle | |
976 | threads. */ | |
977 | ||
db42f210 | 978 | if (using_threads && !disable_packet_Tthread) |
c906108c | 979 | { |
b92a518e DJ |
980 | unsigned int gdb_id_from_wait; |
981 | ||
0d62e5e8 DJ |
982 | /* FIXME right place to set this? */ |
983 | thread_from_wait = ((struct inferior_list_entry *)current_inferior)->id; | |
b92a518e | 984 | gdb_id_from_wait = thread_to_gdb_id (current_inferior); |
a06660f7 | 985 | |
0d62e5e8 | 986 | if (debug_threads) |
a1928bad | 987 | fprintf (stderr, "Writing resume reply for %ld\n\n", thread_from_wait); |
89a208da DJ |
988 | /* This if (1) ought to be unnecessary. But remote_wait in GDB |
989 | will claim this event belongs to inferior_ptid if we do not | |
990 | specify a thread, and there's no way for gdbserver to know | |
991 | what inferior_ptid is. */ | |
992 | if (1 || old_thread_from_wait != thread_from_wait) | |
c906108c | 993 | { |
0d62e5e8 | 994 | general_thread = thread_from_wait; |
a06660f7 | 995 | sprintf (buf, "thread:%x;", gdb_id_from_wait); |
c906108c SS |
996 | buf += strlen (buf); |
997 | old_thread_from_wait = thread_from_wait; | |
998 | } | |
999 | } | |
255e7678 DJ |
1000 | |
1001 | if (dlls_changed) | |
1002 | { | |
1003 | strcpy (buf, "library:;"); | |
1004 | buf += strlen (buf); | |
1005 | dlls_changed = 0; | |
1006 | } | |
c906108c SS |
1007 | } |
1008 | /* For W and X, we're done. */ | |
1009 | *buf++ = 0; | |
1010 | } | |
1011 | ||
1012 | void | |
fba45db2 | 1013 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
c906108c SS |
1014 | { |
1015 | int i = 0, j = 0; | |
1016 | char ch; | |
1017 | *mem_addr_ptr = *len_ptr = 0; | |
1018 | ||
1019 | while ((ch = from[i++]) != ',') | |
1020 | { | |
1021 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1022 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1023 | } | |
1024 | ||
1025 | for (j = 0; j < 4; j++) | |
1026 | { | |
1027 | if ((ch = from[i++]) == 0) | |
1028 | break; | |
1029 | *len_ptr = *len_ptr << 4; | |
1030 | *len_ptr |= fromhex (ch) & 0x0f; | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | void | |
fba45db2 | 1035 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
f450004a | 1036 | unsigned char *to) |
c906108c SS |
1037 | { |
1038 | int i = 0; | |
1039 | char ch; | |
1040 | *mem_addr_ptr = *len_ptr = 0; | |
1041 | ||
1042 | while ((ch = from[i++]) != ',') | |
1043 | { | |
1044 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1045 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1046 | } | |
1047 | ||
1048 | while ((ch = from[i++]) != ':') | |
1049 | { | |
1050 | *len_ptr = *len_ptr << 4; | |
1051 | *len_ptr |= fromhex (ch) & 0x0f; | |
1052 | } | |
1053 | ||
1054 | convert_ascii_to_int (&from[i++], to, *len_ptr); | |
1055 | } | |
2f2893d9 | 1056 | |
01f9e8fa DJ |
1057 | int |
1058 | decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr, | |
1059 | unsigned int *len_ptr, unsigned char *to) | |
1060 | { | |
1061 | int i = 0; | |
1062 | char ch; | |
1063 | *mem_addr_ptr = *len_ptr = 0; | |
1064 | ||
1065 | while ((ch = from[i++]) != ',') | |
1066 | { | |
1067 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1068 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1069 | } | |
1070 | ||
1071 | while ((ch = from[i++]) != ':') | |
1072 | { | |
1073 | *len_ptr = *len_ptr << 4; | |
1074 | *len_ptr |= fromhex (ch) & 0x0f; | |
1075 | } | |
1076 | ||
1077 | if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i, | |
1078 | to, *len_ptr) != *len_ptr) | |
1079 | return -1; | |
1080 | ||
1081 | return 0; | |
1082 | } | |
1083 | ||
0e7f50da UW |
1084 | /* Decode a qXfer write request. */ |
1085 | int | |
1086 | decode_xfer_write (char *buf, int packet_len, char **annex, CORE_ADDR *offset, | |
1087 | unsigned int *len, unsigned char *data) | |
1088 | { | |
1089 | char ch; | |
1090 | ||
1091 | /* Extract and NUL-terminate the annex. */ | |
1092 | *annex = buf; | |
1093 | while (*buf && *buf != ':') | |
1094 | buf++; | |
1095 | if (*buf == '\0') | |
1096 | return -1; | |
1097 | *buf++ = 0; | |
1098 | ||
1099 | /* Extract the offset. */ | |
1100 | *offset = 0; | |
1101 | while ((ch = *buf++) != ':') | |
1102 | { | |
1103 | *offset = *offset << 4; | |
1104 | *offset |= fromhex (ch) & 0x0f; | |
1105 | } | |
1106 | ||
1107 | /* Get encoded data. */ | |
1108 | packet_len -= buf - *annex; | |
1109 | *len = remote_unescape_input ((const gdb_byte *) buf, packet_len, | |
1110 | data, packet_len); | |
1111 | return 0; | |
1112 | } | |
1113 | ||
08388c79 DE |
1114 | /* Decode the parameters of a qSearch:memory packet. */ |
1115 | ||
1116 | int | |
1117 | decode_search_memory_packet (const char *buf, int packet_len, | |
1118 | CORE_ADDR *start_addrp, | |
1119 | CORE_ADDR *search_space_lenp, | |
1120 | gdb_byte *pattern, unsigned int *pattern_lenp) | |
1121 | { | |
1122 | const char *p = buf; | |
1123 | ||
1124 | p = decode_address_to_semicolon (start_addrp, p); | |
1125 | p = decode_address_to_semicolon (search_space_lenp, p); | |
1126 | packet_len -= p - buf; | |
1127 | *pattern_lenp = remote_unescape_input ((const gdb_byte *) p, packet_len, | |
1128 | pattern, packet_len); | |
1129 | return 0; | |
1130 | } | |
1131 | ||
fd500816 DJ |
1132 | /* Ask GDB for the address of NAME, and return it in ADDRP if found. |
1133 | Returns 1 if the symbol is found, 0 if it is not, -1 on error. */ | |
1134 | ||
2f2893d9 DJ |
1135 | int |
1136 | look_up_one_symbol (const char *name, CORE_ADDR *addrp) | |
1137 | { | |
1138 | char own_buf[266], *p, *q; | |
1139 | int len; | |
fd500816 DJ |
1140 | struct sym_cache *sym; |
1141 | ||
1142 | /* Check the cache first. */ | |
1143 | for (sym = symbol_cache; sym; sym = sym->next) | |
1144 | if (strcmp (name, sym->name) == 0) | |
1145 | { | |
1146 | *addrp = sym->addr; | |
1147 | return 1; | |
1148 | } | |
2f2893d9 | 1149 | |
ea025f5f DJ |
1150 | /* If we've passed the call to thread_db_look_up_symbols, then |
1151 | anything not in the cache must not exist; we're not interested | |
1152 | in any libraries loaded after that point, only in symbols in | |
1153 | libpthread.so. It might not be an appropriate time to look | |
1154 | up a symbol, e.g. while we're trying to fetch registers. */ | |
1155 | if (all_symbols_looked_up) | |
1156 | return 0; | |
1157 | ||
2f2893d9 DJ |
1158 | /* Send the request. */ |
1159 | strcpy (own_buf, "qSymbol:"); | |
1160 | hexify (own_buf + strlen ("qSymbol:"), name, strlen (name)); | |
1161 | if (putpkt (own_buf) < 0) | |
1162 | return -1; | |
1163 | ||
1164 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
1165 | len = getpkt (own_buf); | |
1166 | if (len < 0) | |
1167 | return -1; | |
1168 | ||
2bbe3cc1 DJ |
1169 | /* We ought to handle pretty much any packet at this point while we |
1170 | wait for the qSymbol "response". That requires re-entering the | |
1171 | main loop. For now, this is an adequate approximation; allow | |
1172 | GDB to read from memory while it figures out the address of the | |
1173 | symbol. */ | |
1174 | while (own_buf[0] == 'm') | |
1175 | { | |
1176 | CORE_ADDR mem_addr; | |
1177 | unsigned char *mem_buf; | |
1178 | unsigned int mem_len; | |
1179 | ||
1180 | decode_m_packet (&own_buf[1], &mem_addr, &mem_len); | |
1181 | mem_buf = malloc (mem_len); | |
1182 | if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0) | |
1183 | convert_int_to_ascii (mem_buf, own_buf, mem_len); | |
1184 | else | |
1185 | write_enn (own_buf); | |
1186 | free (mem_buf); | |
1187 | if (putpkt (own_buf) < 0) | |
1188 | return -1; | |
1189 | len = getpkt (own_buf); | |
1190 | if (len < 0) | |
1191 | return -1; | |
1192 | } | |
1193 | ||
2f2893d9 DJ |
1194 | if (strncmp (own_buf, "qSymbol:", strlen ("qSymbol:")) != 0) |
1195 | { | |
2bbe3cc1 | 1196 | warning ("Malformed response to qSymbol, ignoring: %s\n", own_buf); |
2f2893d9 DJ |
1197 | return -1; |
1198 | } | |
1199 | ||
1200 | p = own_buf + strlen ("qSymbol:"); | |
1201 | q = p; | |
1202 | while (*q && *q != ':') | |
1203 | q++; | |
1204 | ||
1205 | /* Make sure we found a value for the symbol. */ | |
1206 | if (p == q || *q == '\0') | |
1207 | return 0; | |
1208 | ||
1209 | decode_address (addrp, p, q - p); | |
fd500816 DJ |
1210 | |
1211 | /* Save the symbol in our cache. */ | |
1212 | sym = malloc (sizeof (*sym)); | |
1213 | sym->name = strdup (name); | |
1214 | sym->addr = *addrp; | |
1215 | sym->next = symbol_cache; | |
1216 | symbol_cache = sym; | |
1217 | ||
2f2893d9 DJ |
1218 | return 1; |
1219 | } | |
c74d0ad8 DJ |
1220 | |
1221 | void | |
bce7165d | 1222 | monitor_output (const char *msg) |
c74d0ad8 DJ |
1223 | { |
1224 | char *buf = malloc (strlen (msg) * 2 + 2); | |
1225 | ||
1226 | buf[0] = 'O'; | |
1227 | hexify (buf + 1, msg, 0); | |
1228 | ||
1229 | putpkt (buf); | |
1230 | free (buf); | |
1231 | } | |
255e7678 DJ |
1232 | |
1233 | /* Return a malloc allocated string with special characters from TEXT | |
1234 | replaced by entity references. */ | |
1235 | ||
1236 | char * | |
1237 | xml_escape_text (const char *text) | |
1238 | { | |
1239 | char *result; | |
1240 | int i, special; | |
1241 | ||
1242 | /* Compute the length of the result. */ | |
1243 | for (i = 0, special = 0; text[i] != '\0'; i++) | |
1244 | switch (text[i]) | |
1245 | { | |
1246 | case '\'': | |
1247 | case '\"': | |
1248 | special += 5; | |
1249 | break; | |
1250 | case '&': | |
1251 | special += 4; | |
1252 | break; | |
1253 | case '<': | |
1254 | case '>': | |
1255 | special += 3; | |
1256 | break; | |
1257 | default: | |
1258 | break; | |
1259 | } | |
1260 | ||
1261 | /* Expand the result. */ | |
1262 | result = malloc (i + special + 1); | |
1263 | for (i = 0, special = 0; text[i] != '\0'; i++) | |
1264 | switch (text[i]) | |
1265 | { | |
1266 | case '\'': | |
1267 | strcpy (result + i + special, "'"); | |
1268 | special += 5; | |
1269 | break; | |
1270 | case '\"': | |
1271 | strcpy (result + i + special, """); | |
1272 | special += 5; | |
1273 | break; | |
1274 | case '&': | |
1275 | strcpy (result + i + special, "&"); | |
1276 | special += 4; | |
1277 | break; | |
1278 | case '<': | |
1279 | strcpy (result + i + special, "<"); | |
1280 | special += 3; | |
1281 | break; | |
1282 | case '>': | |
1283 | strcpy (result + i + special, ">"); | |
1284 | special += 3; | |
1285 | break; | |
1286 | default: | |
1287 | result[i + special] = text[i]; | |
1288 | break; | |
1289 | } | |
1290 | result[i + special] = '\0'; | |
1291 | ||
1292 | return result; | |
1293 | } |