Commit | Line | Data |
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c906108c | 1 | /* Remote utility routines for the remote server for GDB. |
6aba47ca DJ |
2 | Copyright (C) 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
3 | 2001, 2002, 2003, 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 | #include "terminal.h" | |
24 | #include <stdio.h> | |
25 | #include <string.h> | |
b80864fb | 26 | #if HAVE_SYS_IOCTL_H |
c906108c | 27 | #include <sys/ioctl.h> |
b80864fb | 28 | #endif |
68070c10 | 29 | #if HAVE_SYS_FILE_H |
c906108c | 30 | #include <sys/file.h> |
68070c10 | 31 | #endif |
b80864fb | 32 | #if HAVE_NETINET_IN_H |
c906108c | 33 | #include <netinet/in.h> |
b80864fb DJ |
34 | #endif |
35 | #if HAVE_SYS_SOCKET_H | |
c906108c | 36 | #include <sys/socket.h> |
b80864fb DJ |
37 | #endif |
38 | #if HAVE_NETDB_H | |
c906108c | 39 | #include <netdb.h> |
b80864fb DJ |
40 | #endif |
41 | #if HAVE_NETINET_TCP_H | |
c906108c | 42 | #include <netinet/tcp.h> |
b80864fb DJ |
43 | #endif |
44 | #if HAVE_SYS_IOCTL_H | |
c906108c | 45 | #include <sys/ioctl.h> |
b80864fb | 46 | #endif |
68070c10 | 47 | #if HAVE_SIGNAL_H |
c906108c | 48 | #include <signal.h> |
68070c10 PA |
49 | #endif |
50 | #if HAVE_FCNTL_H | |
c906108c | 51 | #include <fcntl.h> |
68070c10 | 52 | #endif |
cf30a8e1 | 53 | #include <sys/time.h> |
68070c10 | 54 | #if HAVE_UNISTD_H |
cf30a8e1 | 55 | #include <unistd.h> |
68070c10 | 56 | #endif |
b80864fb | 57 | #if HAVE_ARPA_INET_H |
0729219d | 58 | #include <arpa/inet.h> |
b80864fb | 59 | #endif |
8264bb58 | 60 | #include <sys/stat.h> |
68070c10 | 61 | #if HAVE_ERRNO_H |
8264bb58 | 62 | #include <errno.h> |
68070c10 | 63 | #endif |
b80864fb DJ |
64 | |
65 | #if USE_WIN32API | |
66 | #include <winsock.h> | |
67 | #endif | |
c906108c | 68 | |
f450004a DJ |
69 | #ifndef HAVE_SOCKLEN_T |
70 | typedef int socklen_t; | |
71 | #endif | |
72 | ||
fd500816 DJ |
73 | /* A cache entry for a successfully looked-up symbol. */ |
74 | struct sym_cache | |
75 | { | |
76 | const char *name; | |
77 | CORE_ADDR addr; | |
78 | struct sym_cache *next; | |
79 | }; | |
80 | ||
81 | /* The symbol cache. */ | |
82 | static struct sym_cache *symbol_cache; | |
83 | ||
ea025f5f DJ |
84 | /* If this flag has been set, assume cache misses are |
85 | failures. */ | |
86 | int all_symbols_looked_up; | |
87 | ||
c906108c | 88 | int remote_debug = 0; |
03863182 | 89 | struct ui_file *gdb_stdlog; |
c906108c SS |
90 | |
91 | static int remote_desc; | |
92 | ||
0d62e5e8 DJ |
93 | /* FIXME headerize? */ |
94 | extern int using_threads; | |
95 | extern int debug_threads; | |
96 | ||
0f48aa01 | 97 | #ifdef USE_WIN32API |
68070c10 PA |
98 | # define read(fd, buf, len) recv (fd, (char *) buf, len, 0) |
99 | # define write(fd, buf, len) send (fd, (char *) buf, len, 0) | |
0f48aa01 DJ |
100 | #endif |
101 | ||
c906108c SS |
102 | /* Open a connection to a remote debugger. |
103 | NAME is the filename used for communication. */ | |
104 | ||
105 | void | |
fba45db2 | 106 | remote_open (char *name) |
c906108c | 107 | { |
b80864fb | 108 | #if defined(F_SETFL) && defined (FASYNC) |
c906108c | 109 | int save_fcntl_flags; |
b80864fb | 110 | #endif |
8264bb58 DJ |
111 | char *port_str; |
112 | ||
113 | port_str = strchr (name, ':'); | |
114 | if (port_str == NULL) | |
c906108c | 115 | { |
b80864fb DJ |
116 | #ifdef USE_WIN32API |
117 | error ("Only <host>:<port> is supported on this platform."); | |
118 | #else | |
8264bb58 DJ |
119 | struct stat statbuf; |
120 | ||
121 | if (stat (name, &statbuf) == 0 | |
122 | && (S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode))) | |
123 | remote_desc = open (name, O_RDWR); | |
124 | else | |
125 | { | |
126 | errno = EINVAL; | |
127 | remote_desc = -1; | |
128 | } | |
129 | ||
c906108c SS |
130 | if (remote_desc < 0) |
131 | perror_with_name ("Could not open remote device"); | |
132 | ||
133 | #ifdef HAVE_TERMIOS | |
134 | { | |
135 | struct termios termios; | |
c5aa993b | 136 | tcgetattr (remote_desc, &termios); |
c906108c SS |
137 | |
138 | termios.c_iflag = 0; | |
139 | termios.c_oflag = 0; | |
140 | termios.c_lflag = 0; | |
c5aa993b | 141 | termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 142 | termios.c_cflag |= CLOCAL | CS8; |
d0608e50 | 143 | termios.c_cc[VMIN] = 1; |
c906108c SS |
144 | termios.c_cc[VTIME] = 0; |
145 | ||
c5aa993b | 146 | tcsetattr (remote_desc, TCSANOW, &termios); |
c906108c SS |
147 | } |
148 | #endif | |
149 | ||
150 | #ifdef HAVE_TERMIO | |
151 | { | |
152 | struct termio termio; | |
153 | ioctl (remote_desc, TCGETA, &termio); | |
154 | ||
155 | termio.c_iflag = 0; | |
156 | termio.c_oflag = 0; | |
157 | termio.c_lflag = 0; | |
c5aa993b | 158 | termio.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 159 | termio.c_cflag |= CLOCAL | CS8; |
d0608e50 | 160 | termio.c_cc[VMIN] = 1; |
c906108c SS |
161 | termio.c_cc[VTIME] = 0; |
162 | ||
163 | ioctl (remote_desc, TCSETA, &termio); | |
164 | } | |
165 | #endif | |
166 | ||
167 | #ifdef HAVE_SGTTY | |
168 | { | |
169 | struct sgttyb sg; | |
170 | ||
171 | ioctl (remote_desc, TIOCGETP, &sg); | |
172 | sg.sg_flags = RAW; | |
173 | ioctl (remote_desc, TIOCSETP, &sg); | |
174 | } | |
175 | #endif | |
176 | ||
e641a1ca | 177 | fprintf (stderr, "Remote debugging using %s\n", name); |
b80864fb | 178 | #endif /* USE_WIN32API */ |
c906108c SS |
179 | } |
180 | else | |
181 | { | |
b80864fb DJ |
182 | #ifdef USE_WIN32API |
183 | static int winsock_initialized; | |
184 | #endif | |
c906108c SS |
185 | char *port_str; |
186 | int port; | |
187 | struct sockaddr_in sockaddr; | |
f450004a | 188 | socklen_t tmp; |
c906108c SS |
189 | int tmp_desc; |
190 | ||
191 | port_str = strchr (name, ':'); | |
192 | ||
193 | port = atoi (port_str + 1); | |
194 | ||
b80864fb DJ |
195 | #ifdef USE_WIN32API |
196 | if (!winsock_initialized) | |
197 | { | |
198 | WSADATA wsad; | |
199 | ||
200 | WSAStartup (MAKEWORD (1, 0), &wsad); | |
201 | winsock_initialized = 1; | |
202 | } | |
203 | #endif | |
204 | ||
205 | tmp_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); | |
c906108c SS |
206 | if (tmp_desc < 0) |
207 | perror_with_name ("Can't open socket"); | |
208 | ||
209 | /* Allow rapid reuse of this port. */ | |
210 | tmp = 1; | |
c5aa993b JM |
211 | setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, |
212 | sizeof (tmp)); | |
c906108c SS |
213 | |
214 | sockaddr.sin_family = PF_INET; | |
c5aa993b | 215 | sockaddr.sin_port = htons (port); |
c906108c SS |
216 | sockaddr.sin_addr.s_addr = INADDR_ANY; |
217 | ||
c5aa993b | 218 | if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
c906108c SS |
219 | || listen (tmp_desc, 1)) |
220 | perror_with_name ("Can't bind address"); | |
221 | ||
6f8486da DJ |
222 | /* If port is zero, a random port will be selected, and the |
223 | fprintf below needs to know what port was selected. */ | |
224 | if (port == 0) | |
225 | { | |
226 | socklen_t len = sizeof (sockaddr); | |
227 | if (getsockname (tmp_desc, (struct sockaddr *) &sockaddr, &len) < 0 | |
228 | || len < sizeof (sockaddr)) | |
229 | perror_with_name ("Can't determine port"); | |
230 | port = ntohs (sockaddr.sin_port); | |
231 | } | |
232 | ||
6910d122 | 233 | fprintf (stderr, "Listening on port %d\n", port); |
b80864fb | 234 | fflush (stderr); |
6910d122 | 235 | |
c906108c | 236 | tmp = sizeof (sockaddr); |
c5aa993b | 237 | remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp); |
c906108c SS |
238 | if (remote_desc == -1) |
239 | perror_with_name ("Accept failed"); | |
240 | ||
c906108c SS |
241 | /* Enable TCP keep alive process. */ |
242 | tmp = 1; | |
c5aa993b | 243 | setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp)); |
c906108c SS |
244 | |
245 | /* Tell TCP not to delay small packets. This greatly speeds up | |
c5aa993b | 246 | interactive response. */ |
c906108c | 247 | tmp = 1; |
373fe97f | 248 | setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY, |
c5aa993b | 249 | (char *) &tmp, sizeof (tmp)); |
c906108c | 250 | |
b80864fb DJ |
251 | |
252 | #ifndef USE_WIN32API | |
c906108c SS |
253 | close (tmp_desc); /* No longer need this */ |
254 | ||
c5aa993b JM |
255 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply |
256 | exits when the remote side dies. */ | |
b80864fb DJ |
257 | #else |
258 | closesocket (tmp_desc); /* No longer need this */ | |
259 | #endif | |
e641a1ca ML |
260 | |
261 | /* Convert IP address to string. */ | |
262 | fprintf (stderr, "Remote debugging from host %s\n", | |
263 | inet_ntoa (sockaddr.sin_addr)); | |
c906108c SS |
264 | } |
265 | ||
266 | #if defined(F_SETFL) && defined (FASYNC) | |
267 | save_fcntl_flags = fcntl (remote_desc, F_GETFL, 0); | |
268 | fcntl (remote_desc, F_SETFL, save_fcntl_flags | FASYNC); | |
cf30a8e1 C |
269 | #if defined (F_SETOWN) |
270 | fcntl (remote_desc, F_SETOWN, getpid ()); | |
94dfea5d | 271 | #endif |
cf30a8e1 | 272 | #endif |
c906108c | 273 | disable_async_io (); |
c906108c SS |
274 | } |
275 | ||
276 | void | |
fba45db2 | 277 | remote_close (void) |
c906108c | 278 | { |
b80864fb DJ |
279 | #ifdef USE_WIN32API |
280 | closesocket (remote_desc); | |
281 | #else | |
c906108c | 282 | close (remote_desc); |
b80864fb | 283 | #endif |
c906108c SS |
284 | } |
285 | ||
286 | /* Convert hex digit A to a number. */ | |
287 | ||
288 | static int | |
fba45db2 | 289 | fromhex (int a) |
c906108c SS |
290 | { |
291 | if (a >= '0' && a <= '9') | |
292 | return a - '0'; | |
293 | else if (a >= 'a' && a <= 'f') | |
294 | return a - 'a' + 10; | |
295 | else | |
296 | error ("Reply contains invalid hex digit"); | |
0a30fbc4 | 297 | return 0; |
c906108c SS |
298 | } |
299 | ||
ce3a066d DJ |
300 | int |
301 | unhexify (char *bin, const char *hex, int count) | |
302 | { | |
303 | int i; | |
304 | ||
305 | for (i = 0; i < count; i++) | |
306 | { | |
307 | if (hex[0] == 0 || hex[1] == 0) | |
308 | { | |
309 | /* Hex string is short, or of uneven length. | |
310 | Return the count that has been converted so far. */ | |
311 | return i; | |
312 | } | |
313 | *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); | |
314 | hex += 2; | |
315 | } | |
316 | return i; | |
317 | } | |
318 | ||
dae5f5cf | 319 | void |
2f2893d9 DJ |
320 | decode_address (CORE_ADDR *addrp, const char *start, int len) |
321 | { | |
322 | CORE_ADDR addr; | |
323 | char ch; | |
324 | int i; | |
325 | ||
326 | addr = 0; | |
327 | for (i = 0; i < len; i++) | |
328 | { | |
329 | ch = start[i]; | |
330 | addr = addr << 4; | |
331 | addr = addr | (fromhex (ch) & 0x0f); | |
332 | } | |
333 | *addrp = addr; | |
334 | } | |
335 | ||
89be2091 DJ |
336 | const char * |
337 | decode_address_to_semicolon (CORE_ADDR *addrp, const char *start) | |
338 | { | |
339 | const char *end; | |
340 | ||
341 | end = start; | |
342 | while (*end != '\0' && *end != ';') | |
343 | end++; | |
344 | ||
345 | decode_address (addrp, start, end - start); | |
346 | ||
347 | if (*end == ';') | |
348 | end++; | |
349 | return end; | |
350 | } | |
351 | ||
c906108c SS |
352 | /* Convert number NIB to a hex digit. */ |
353 | ||
354 | static int | |
fba45db2 | 355 | tohex (int nib) |
c906108c SS |
356 | { |
357 | if (nib < 10) | |
358 | return '0' + nib; | |
359 | else | |
360 | return 'a' + nib - 10; | |
361 | } | |
362 | ||
ce3a066d DJ |
363 | int |
364 | hexify (char *hex, const char *bin, int count) | |
365 | { | |
366 | int i; | |
367 | ||
368 | /* May use a length, or a nul-terminated string as input. */ | |
369 | if (count == 0) | |
370 | count = strlen (bin); | |
371 | ||
372 | for (i = 0; i < count; i++) | |
373 | { | |
374 | *hex++ = tohex ((*bin >> 4) & 0xf); | |
375 | *hex++ = tohex (*bin++ & 0xf); | |
376 | } | |
377 | *hex = 0; | |
378 | return i; | |
379 | } | |
380 | ||
01f9e8fa DJ |
381 | /* Convert BUFFER, binary data at least LEN bytes long, into escaped |
382 | binary data in OUT_BUF. Set *OUT_LEN to the length of the data | |
383 | encoded in OUT_BUF, and return the number of bytes in OUT_BUF | |
384 | (which may be more than *OUT_LEN due to escape characters). The | |
385 | total number of bytes in the output buffer will be at most | |
386 | OUT_MAXLEN. */ | |
387 | ||
388 | int | |
389 | remote_escape_output (const gdb_byte *buffer, int len, | |
390 | gdb_byte *out_buf, int *out_len, | |
391 | int out_maxlen) | |
392 | { | |
393 | int input_index, output_index; | |
394 | ||
395 | output_index = 0; | |
396 | for (input_index = 0; input_index < len; input_index++) | |
397 | { | |
398 | gdb_byte b = buffer[input_index]; | |
399 | ||
400 | if (b == '$' || b == '#' || b == '}' || b == '*') | |
401 | { | |
402 | /* These must be escaped. */ | |
403 | if (output_index + 2 > out_maxlen) | |
404 | break; | |
405 | out_buf[output_index++] = '}'; | |
406 | out_buf[output_index++] = b ^ 0x20; | |
407 | } | |
408 | else | |
409 | { | |
410 | if (output_index + 1 > out_maxlen) | |
411 | break; | |
412 | out_buf[output_index++] = b; | |
413 | } | |
414 | } | |
415 | ||
416 | *out_len = input_index; | |
417 | return output_index; | |
418 | } | |
419 | ||
420 | /* Convert BUFFER, escaped data LEN bytes long, into binary data | |
421 | in OUT_BUF. Return the number of bytes written to OUT_BUF. | |
422 | Raise an error if the total number of bytes exceeds OUT_MAXLEN. | |
423 | ||
424 | This function reverses remote_escape_output. It allows more | |
425 | escaped characters than that function does, in particular because | |
426 | '*' must be escaped to avoid the run-length encoding processing | |
427 | in reading packets. */ | |
428 | ||
429 | static int | |
430 | remote_unescape_input (const gdb_byte *buffer, int len, | |
431 | gdb_byte *out_buf, int out_maxlen) | |
432 | { | |
433 | int input_index, output_index; | |
434 | int escaped; | |
435 | ||
436 | output_index = 0; | |
437 | escaped = 0; | |
438 | for (input_index = 0; input_index < len; input_index++) | |
439 | { | |
440 | gdb_byte b = buffer[input_index]; | |
441 | ||
442 | if (output_index + 1 > out_maxlen) | |
443 | error ("Received too much data from the target."); | |
444 | ||
445 | if (escaped) | |
446 | { | |
447 | out_buf[output_index++] = b ^ 0x20; | |
448 | escaped = 0; | |
449 | } | |
450 | else if (b == '}') | |
451 | escaped = 1; | |
452 | else | |
453 | out_buf[output_index++] = b; | |
454 | } | |
455 | ||
456 | if (escaped) | |
457 | error ("Unmatched escape character in target response."); | |
458 | ||
459 | return output_index; | |
460 | } | |
461 | ||
5ffff7c1 DJ |
462 | /* Look for a sequence of characters which can be run-length encoded. |
463 | If there are any, update *CSUM and *P. Otherwise, output the | |
464 | single character. Return the number of characters consumed. */ | |
465 | ||
466 | static int | |
467 | try_rle (char *buf, int remaining, unsigned char *csum, char **p) | |
468 | { | |
469 | int n; | |
470 | ||
471 | /* Always output the character. */ | |
472 | *csum += buf[0]; | |
473 | *(*p)++ = buf[0]; | |
474 | ||
475 | /* Don't go past '~'. */ | |
476 | if (remaining > 97) | |
477 | remaining = 97; | |
478 | ||
479 | for (n = 1; n < remaining; n++) | |
480 | if (buf[n] != buf[0]) | |
481 | break; | |
482 | ||
483 | /* N is the index of the first character not the same as buf[0]. | |
484 | buf[0] is counted twice, so by decrementing N, we get the number | |
485 | of characters the RLE sequence will replace. */ | |
486 | n--; | |
487 | ||
488 | if (n < 3) | |
489 | return 1; | |
490 | ||
491 | /* Skip the frame characters. The manual says to skip '+' and '-' | |
492 | also, but there's no reason to. Unfortunately these two unusable | |
493 | characters double the encoded length of a four byte zero | |
494 | value. */ | |
495 | while (n + 29 == '$' || n + 29 == '#') | |
496 | n--; | |
497 | ||
498 | *csum += '*'; | |
499 | *(*p)++ = '*'; | |
500 | *csum += n + 29; | |
501 | *(*p)++ = n + 29; | |
502 | ||
503 | return n + 1; | |
504 | } | |
505 | ||
c906108c | 506 | /* Send a packet to the remote machine, with error checking. |
01f9e8fa DJ |
507 | The data of the packet is in BUF, and the length of the |
508 | packet is in CNT. Returns >= 0 on success, -1 otherwise. */ | |
c906108c SS |
509 | |
510 | int | |
01f9e8fa | 511 | putpkt_binary (char *buf, int cnt) |
c906108c SS |
512 | { |
513 | int i; | |
514 | unsigned char csum = 0; | |
0a30fbc4 | 515 | char *buf2; |
c906108c | 516 | char buf3[1]; |
c906108c SS |
517 | char *p; |
518 | ||
0a30fbc4 DJ |
519 | buf2 = malloc (PBUFSIZ); |
520 | ||
c906108c SS |
521 | /* Copy the packet into buffer BUF2, encapsulating it |
522 | and giving it a checksum. */ | |
523 | ||
524 | p = buf2; | |
525 | *p++ = '$'; | |
526 | ||
5ffff7c1 DJ |
527 | for (i = 0; i < cnt;) |
528 | i += try_rle (buf + i, cnt - i, &csum, &p); | |
529 | ||
c906108c SS |
530 | *p++ = '#'; |
531 | *p++ = tohex ((csum >> 4) & 0xf); | |
532 | *p++ = tohex (csum & 0xf); | |
533 | ||
534 | *p = '\0'; | |
535 | ||
536 | /* Send it over and over until we get a positive ack. */ | |
537 | ||
538 | do | |
539 | { | |
540 | int cc; | |
541 | ||
0f48aa01 | 542 | if (write (remote_desc, buf2, p - buf2) != p - buf2) |
c906108c SS |
543 | { |
544 | perror ("putpkt(write)"); | |
545 | return -1; | |
546 | } | |
547 | ||
548 | if (remote_debug) | |
0d62e5e8 DJ |
549 | { |
550 | fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2); | |
551 | fflush (stderr); | |
552 | } | |
0f48aa01 | 553 | cc = read (remote_desc, buf3, 1); |
c906108c | 554 | if (remote_debug) |
0d62e5e8 DJ |
555 | { |
556 | fprintf (stderr, "[received '%c' (0x%x)]\n", buf3[0], buf3[0]); | |
557 | fflush (stderr); | |
558 | } | |
559 | ||
c906108c SS |
560 | if (cc <= 0) |
561 | { | |
562 | if (cc == 0) | |
563 | fprintf (stderr, "putpkt(read): Got EOF\n"); | |
564 | else | |
565 | perror ("putpkt(read)"); | |
566 | ||
0a30fbc4 | 567 | free (buf2); |
c906108c SS |
568 | return -1; |
569 | } | |
0d62e5e8 DJ |
570 | |
571 | /* Check for an input interrupt while we're here. */ | |
572 | if (buf3[0] == '\003') | |
ef57601b | 573 | (*the_target->request_interrupt) (); |
c906108c SS |
574 | } |
575 | while (buf3[0] != '+'); | |
576 | ||
0a30fbc4 | 577 | free (buf2); |
c906108c SS |
578 | return 1; /* Success! */ |
579 | } | |
580 | ||
01f9e8fa DJ |
581 | /* Send a packet to the remote machine, with error checking. The data |
582 | of the packet is in BUF, and the packet should be a NUL-terminated | |
583 | string. Returns >= 0 on success, -1 otherwise. */ | |
584 | ||
585 | int | |
586 | putpkt (char *buf) | |
587 | { | |
588 | return putpkt_binary (buf, strlen (buf)); | |
589 | } | |
590 | ||
b80864fb | 591 | #ifndef USE_WIN32API |
01f9e8fa | 592 | |
c906108c SS |
593 | /* Come here when we get an input interrupt from the remote side. This |
594 | interrupt should only be active while we are waiting for the child to do | |
595 | something. About the only thing that should come through is a ^C, which | |
ef57601b | 596 | will cause us to request child interruption. */ |
c906108c SS |
597 | |
598 | static void | |
0a30fbc4 | 599 | input_interrupt (int unused) |
c906108c | 600 | { |
cf30a8e1 C |
601 | fd_set readset; |
602 | struct timeval immediate = { 0, 0 }; | |
c906108c | 603 | |
cf30a8e1 C |
604 | /* Protect against spurious interrupts. This has been observed to |
605 | be a problem under NetBSD 1.4 and 1.5. */ | |
c906108c | 606 | |
cf30a8e1 C |
607 | FD_ZERO (&readset); |
608 | FD_SET (remote_desc, &readset); | |
609 | if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) | |
c906108c | 610 | { |
cf30a8e1 | 611 | int cc; |
fd500816 | 612 | char c = 0; |
cf30a8e1 | 613 | |
0f48aa01 | 614 | cc = read (remote_desc, &c, 1); |
c906108c | 615 | |
cf30a8e1 C |
616 | if (cc != 1 || c != '\003') |
617 | { | |
fd500816 DJ |
618 | fprintf (stderr, "input_interrupt, count = %d c = %d ('%c')\n", |
619 | cc, c, c); | |
cf30a8e1 C |
620 | return; |
621 | } | |
622 | ||
ef57601b | 623 | (*the_target->request_interrupt) (); |
cf30a8e1 | 624 | } |
c906108c | 625 | } |
b80864fb DJ |
626 | #endif |
627 | ||
628 | /* Asynchronous I/O support. SIGIO must be enabled when waiting, in order to | |
629 | accept Control-C from the client, and must be disabled when talking to | |
630 | the client. */ | |
c906108c | 631 | |
62ea82f5 DJ |
632 | void |
633 | block_async_io (void) | |
634 | { | |
b80864fb | 635 | #ifndef USE_WIN32API |
62ea82f5 DJ |
636 | sigset_t sigio_set; |
637 | sigemptyset (&sigio_set); | |
638 | sigaddset (&sigio_set, SIGIO); | |
639 | sigprocmask (SIG_BLOCK, &sigio_set, NULL); | |
b80864fb | 640 | #endif |
62ea82f5 DJ |
641 | } |
642 | ||
643 | void | |
644 | unblock_async_io (void) | |
645 | { | |
b80864fb | 646 | #ifndef USE_WIN32API |
62ea82f5 DJ |
647 | sigset_t sigio_set; |
648 | sigemptyset (&sigio_set); | |
649 | sigaddset (&sigio_set, SIGIO); | |
650 | sigprocmask (SIG_UNBLOCK, &sigio_set, NULL); | |
b80864fb | 651 | #endif |
62ea82f5 DJ |
652 | } |
653 | ||
fd500816 DJ |
654 | /* Current state of asynchronous I/O. */ |
655 | static int async_io_enabled; | |
656 | ||
657 | /* Enable asynchronous I/O. */ | |
c906108c | 658 | void |
fba45db2 | 659 | enable_async_io (void) |
c906108c | 660 | { |
fd500816 DJ |
661 | if (async_io_enabled) |
662 | return; | |
663 | ||
b80864fb | 664 | #ifndef USE_WIN32API |
c906108c | 665 | signal (SIGIO, input_interrupt); |
b80864fb | 666 | #endif |
fd500816 | 667 | async_io_enabled = 1; |
c906108c SS |
668 | } |
669 | ||
fd500816 | 670 | /* Disable asynchronous I/O. */ |
c906108c | 671 | void |
fba45db2 | 672 | disable_async_io (void) |
c906108c | 673 | { |
fd500816 DJ |
674 | if (!async_io_enabled) |
675 | return; | |
676 | ||
b80864fb | 677 | #ifndef USE_WIN32API |
c906108c | 678 | signal (SIGIO, SIG_IGN); |
b80864fb | 679 | #endif |
fd500816 | 680 | async_io_enabled = 0; |
c906108c SS |
681 | } |
682 | ||
683 | /* Returns next char from remote GDB. -1 if error. */ | |
684 | ||
685 | static int | |
fba45db2 | 686 | readchar (void) |
c906108c | 687 | { |
01f9e8fa | 688 | static unsigned char buf[BUFSIZ]; |
c906108c | 689 | static int bufcnt = 0; |
01f9e8fa | 690 | static unsigned char *bufp; |
c906108c SS |
691 | |
692 | if (bufcnt-- > 0) | |
01f9e8fa | 693 | return *bufp++; |
c906108c | 694 | |
0f48aa01 | 695 | bufcnt = read (remote_desc, buf, sizeof (buf)); |
c906108c SS |
696 | |
697 | if (bufcnt <= 0) | |
698 | { | |
699 | if (bufcnt == 0) | |
700 | fprintf (stderr, "readchar: Got EOF\n"); | |
701 | else | |
702 | perror ("readchar"); | |
703 | ||
704 | return -1; | |
705 | } | |
706 | ||
707 | bufp = buf; | |
708 | bufcnt--; | |
709 | return *bufp++ & 0x7f; | |
710 | } | |
711 | ||
712 | /* Read a packet from the remote machine, with error checking, | |
713 | and store it in BUF. Returns length of packet, or negative if error. */ | |
714 | ||
715 | int | |
fba45db2 | 716 | getpkt (char *buf) |
c906108c SS |
717 | { |
718 | char *bp; | |
719 | unsigned char csum, c1, c2; | |
720 | int c; | |
721 | ||
722 | while (1) | |
723 | { | |
724 | csum = 0; | |
725 | ||
726 | while (1) | |
727 | { | |
728 | c = readchar (); | |
729 | if (c == '$') | |
730 | break; | |
731 | if (remote_debug) | |
0d62e5e8 DJ |
732 | { |
733 | fprintf (stderr, "[getpkt: discarding char '%c']\n", c); | |
734 | fflush (stderr); | |
735 | } | |
736 | ||
c906108c SS |
737 | if (c < 0) |
738 | return -1; | |
739 | } | |
740 | ||
741 | bp = buf; | |
742 | while (1) | |
743 | { | |
744 | c = readchar (); | |
745 | if (c < 0) | |
746 | return -1; | |
747 | if (c == '#') | |
748 | break; | |
749 | *bp++ = c; | |
750 | csum += c; | |
751 | } | |
752 | *bp = 0; | |
753 | ||
754 | c1 = fromhex (readchar ()); | |
755 | c2 = fromhex (readchar ()); | |
c5aa993b | 756 | |
c906108c SS |
757 | if (csum == (c1 << 4) + c2) |
758 | break; | |
759 | ||
760 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", | |
761 | (c1 << 4) + c2, csum, buf); | |
0f48aa01 | 762 | write (remote_desc, "-", 1); |
c906108c SS |
763 | } |
764 | ||
765 | if (remote_debug) | |
0d62e5e8 DJ |
766 | { |
767 | fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf); | |
768 | fflush (stderr); | |
769 | } | |
c906108c | 770 | |
0f48aa01 | 771 | write (remote_desc, "+", 1); |
c906108c SS |
772 | |
773 | if (remote_debug) | |
0d62e5e8 DJ |
774 | { |
775 | fprintf (stderr, "[sent ack]\n"); | |
776 | fflush (stderr); | |
777 | } | |
778 | ||
c906108c SS |
779 | return bp - buf; |
780 | } | |
781 | ||
782 | void | |
fba45db2 | 783 | write_ok (char *buf) |
c906108c SS |
784 | { |
785 | buf[0] = 'O'; | |
786 | buf[1] = 'K'; | |
787 | buf[2] = '\0'; | |
788 | } | |
789 | ||
790 | void | |
fba45db2 | 791 | write_enn (char *buf) |
c906108c | 792 | { |
c89dc5d4 | 793 | /* Some day, we should define the meanings of the error codes... */ |
c906108c | 794 | buf[0] = 'E'; |
c89dc5d4 DJ |
795 | buf[1] = '0'; |
796 | buf[2] = '1'; | |
c906108c SS |
797 | buf[3] = '\0'; |
798 | } | |
799 | ||
800 | void | |
f450004a | 801 | convert_int_to_ascii (unsigned char *from, char *to, int n) |
c906108c SS |
802 | { |
803 | int nib; | |
f450004a | 804 | int ch; |
c906108c SS |
805 | while (n--) |
806 | { | |
807 | ch = *from++; | |
808 | nib = ((ch & 0xf0) >> 4) & 0x0f; | |
809 | *to++ = tohex (nib); | |
810 | nib = ch & 0x0f; | |
811 | *to++ = tohex (nib); | |
812 | } | |
813 | *to++ = 0; | |
814 | } | |
815 | ||
816 | ||
817 | void | |
f450004a | 818 | convert_ascii_to_int (char *from, unsigned char *to, int n) |
c906108c SS |
819 | { |
820 | int nib1, nib2; | |
821 | while (n--) | |
822 | { | |
823 | nib1 = fromhex (*from++); | |
824 | nib2 = fromhex (*from++); | |
825 | *to++ = (((nib1 & 0x0f) << 4) & 0xf0) | (nib2 & 0x0f); | |
826 | } | |
827 | } | |
828 | ||
829 | static char * | |
fba45db2 | 830 | outreg (int regno, char *buf) |
c906108c | 831 | { |
5c44784c JM |
832 | if ((regno >> 12) != 0) |
833 | *buf++ = tohex ((regno >> 12) & 0xf); | |
834 | if ((regno >> 8) != 0) | |
835 | *buf++ = tohex ((regno >> 8) & 0xf); | |
836 | *buf++ = tohex ((regno >> 4) & 0xf); | |
c906108c SS |
837 | *buf++ = tohex (regno & 0xf); |
838 | *buf++ = ':'; | |
0d62e5e8 DJ |
839 | collect_register_as_string (regno, buf); |
840 | buf += 2 * register_size (regno); | |
c906108c SS |
841 | *buf++ = ';'; |
842 | ||
843 | return buf; | |
844 | } | |
845 | ||
0d62e5e8 DJ |
846 | void |
847 | new_thread_notify (int id) | |
848 | { | |
849 | char own_buf[256]; | |
850 | ||
851 | /* The `n' response is not yet part of the remote protocol. Do nothing. */ | |
852 | if (1) | |
853 | return; | |
854 | ||
855 | if (server_waiting == 0) | |
856 | return; | |
857 | ||
858 | sprintf (own_buf, "n%x", id); | |
859 | disable_async_io (); | |
860 | putpkt (own_buf); | |
861 | enable_async_io (); | |
862 | } | |
863 | ||
864 | void | |
865 | dead_thread_notify (int id) | |
866 | { | |
867 | char own_buf[256]; | |
868 | ||
869 | /* The `x' response is not yet part of the remote protocol. Do nothing. */ | |
870 | if (1) | |
871 | return; | |
872 | ||
873 | sprintf (own_buf, "x%x", id); | |
874 | disable_async_io (); | |
875 | putpkt (own_buf); | |
876 | enable_async_io (); | |
877 | } | |
878 | ||
c906108c | 879 | void |
b80864fb | 880 | prepare_resume_reply (char *buf, char status, unsigned char sig) |
c906108c | 881 | { |
b80864fb | 882 | int nib; |
c906108c SS |
883 | |
884 | *buf++ = status; | |
885 | ||
0e98d0a7 | 886 | nib = ((sig & 0xf0) >> 4); |
c906108c | 887 | *buf++ = tohex (nib); |
0e98d0a7 | 888 | nib = sig & 0x0f; |
c906108c SS |
889 | *buf++ = tohex (nib); |
890 | ||
891 | if (status == 'T') | |
892 | { | |
0a30fbc4 | 893 | const char **regp = gdbserver_expedite_regs; |
e013ee27 OF |
894 | |
895 | if (the_target->stopped_by_watchpoint != NULL | |
896 | && (*the_target->stopped_by_watchpoint) ()) | |
897 | { | |
898 | CORE_ADDR addr; | |
899 | int i; | |
900 | ||
901 | strncpy (buf, "watch:", 6); | |
902 | buf += 6; | |
903 | ||
904 | addr = (*the_target->stopped_data_address) (); | |
905 | ||
906 | /* Convert each byte of the address into two hexadecimal chars. | |
907 | Note that we take sizeof (void *) instead of sizeof (addr); | |
908 | this is to avoid sending a 64-bit address to a 32-bit GDB. */ | |
909 | for (i = sizeof (void *) * 2; i > 0; i--) | |
910 | { | |
911 | *buf++ = tohex ((addr >> (i - 1) * 4) & 0xf); | |
912 | } | |
913 | *buf++ = ';'; | |
914 | } | |
915 | ||
0a30fbc4 | 916 | while (*regp) |
5c44784c | 917 | { |
0a30fbc4 DJ |
918 | buf = outreg (find_regno (*regp), buf); |
919 | regp ++; | |
5c44784c | 920 | } |
c906108c | 921 | |
0d62e5e8 DJ |
922 | /* Formerly, if the debugger had not used any thread features we would not |
923 | burden it with a thread status response. This was for the benefit of | |
924 | GDB 4.13 and older. However, in recent GDB versions the check | |
925 | (``if (cont_thread != 0)'') does not have the desired effect because of | |
926 | sillyness in the way that the remote protocol handles specifying a thread. | |
927 | Since thread support relies on qSymbol support anyway, assume GDB can handle | |
928 | threads. */ | |
929 | ||
930 | if (using_threads) | |
c906108c | 931 | { |
b92a518e DJ |
932 | unsigned int gdb_id_from_wait; |
933 | ||
0d62e5e8 DJ |
934 | /* FIXME right place to set this? */ |
935 | thread_from_wait = ((struct inferior_list_entry *)current_inferior)->id; | |
b92a518e | 936 | gdb_id_from_wait = thread_to_gdb_id (current_inferior); |
a06660f7 | 937 | |
0d62e5e8 | 938 | if (debug_threads) |
a1928bad | 939 | fprintf (stderr, "Writing resume reply for %ld\n\n", thread_from_wait); |
89a208da DJ |
940 | /* This if (1) ought to be unnecessary. But remote_wait in GDB |
941 | will claim this event belongs to inferior_ptid if we do not | |
942 | specify a thread, and there's no way for gdbserver to know | |
943 | what inferior_ptid is. */ | |
944 | if (1 || old_thread_from_wait != thread_from_wait) | |
c906108c | 945 | { |
0d62e5e8 | 946 | general_thread = thread_from_wait; |
a06660f7 | 947 | sprintf (buf, "thread:%x;", gdb_id_from_wait); |
c906108c SS |
948 | buf += strlen (buf); |
949 | old_thread_from_wait = thread_from_wait; | |
950 | } | |
951 | } | |
952 | } | |
953 | /* For W and X, we're done. */ | |
954 | *buf++ = 0; | |
955 | } | |
956 | ||
957 | void | |
fba45db2 | 958 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
c906108c SS |
959 | { |
960 | int i = 0, j = 0; | |
961 | char ch; | |
962 | *mem_addr_ptr = *len_ptr = 0; | |
963 | ||
964 | while ((ch = from[i++]) != ',') | |
965 | { | |
966 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
967 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
968 | } | |
969 | ||
970 | for (j = 0; j < 4; j++) | |
971 | { | |
972 | if ((ch = from[i++]) == 0) | |
973 | break; | |
974 | *len_ptr = *len_ptr << 4; | |
975 | *len_ptr |= fromhex (ch) & 0x0f; | |
976 | } | |
977 | } | |
978 | ||
979 | void | |
fba45db2 | 980 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
f450004a | 981 | unsigned char *to) |
c906108c SS |
982 | { |
983 | int i = 0; | |
984 | char ch; | |
985 | *mem_addr_ptr = *len_ptr = 0; | |
986 | ||
987 | while ((ch = from[i++]) != ',') | |
988 | { | |
989 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
990 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
991 | } | |
992 | ||
993 | while ((ch = from[i++]) != ':') | |
994 | { | |
995 | *len_ptr = *len_ptr << 4; | |
996 | *len_ptr |= fromhex (ch) & 0x0f; | |
997 | } | |
998 | ||
999 | convert_ascii_to_int (&from[i++], to, *len_ptr); | |
1000 | } | |
2f2893d9 | 1001 | |
01f9e8fa DJ |
1002 | int |
1003 | decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr, | |
1004 | unsigned int *len_ptr, unsigned char *to) | |
1005 | { | |
1006 | int i = 0; | |
1007 | char ch; | |
1008 | *mem_addr_ptr = *len_ptr = 0; | |
1009 | ||
1010 | while ((ch = from[i++]) != ',') | |
1011 | { | |
1012 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1013 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1014 | } | |
1015 | ||
1016 | while ((ch = from[i++]) != ':') | |
1017 | { | |
1018 | *len_ptr = *len_ptr << 4; | |
1019 | *len_ptr |= fromhex (ch) & 0x0f; | |
1020 | } | |
1021 | ||
1022 | if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i, | |
1023 | to, *len_ptr) != *len_ptr) | |
1024 | return -1; | |
1025 | ||
1026 | return 0; | |
1027 | } | |
1028 | ||
fd500816 DJ |
1029 | /* Ask GDB for the address of NAME, and return it in ADDRP if found. |
1030 | Returns 1 if the symbol is found, 0 if it is not, -1 on error. */ | |
1031 | ||
2f2893d9 DJ |
1032 | int |
1033 | look_up_one_symbol (const char *name, CORE_ADDR *addrp) | |
1034 | { | |
1035 | char own_buf[266], *p, *q; | |
1036 | int len; | |
fd500816 DJ |
1037 | struct sym_cache *sym; |
1038 | ||
1039 | /* Check the cache first. */ | |
1040 | for (sym = symbol_cache; sym; sym = sym->next) | |
1041 | if (strcmp (name, sym->name) == 0) | |
1042 | { | |
1043 | *addrp = sym->addr; | |
1044 | return 1; | |
1045 | } | |
2f2893d9 | 1046 | |
ea025f5f DJ |
1047 | /* If we've passed the call to thread_db_look_up_symbols, then |
1048 | anything not in the cache must not exist; we're not interested | |
1049 | in any libraries loaded after that point, only in symbols in | |
1050 | libpthread.so. It might not be an appropriate time to look | |
1051 | up a symbol, e.g. while we're trying to fetch registers. */ | |
1052 | if (all_symbols_looked_up) | |
1053 | return 0; | |
1054 | ||
2f2893d9 DJ |
1055 | /* Send the request. */ |
1056 | strcpy (own_buf, "qSymbol:"); | |
1057 | hexify (own_buf + strlen ("qSymbol:"), name, strlen (name)); | |
1058 | if (putpkt (own_buf) < 0) | |
1059 | return -1; | |
1060 | ||
1061 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
1062 | len = getpkt (own_buf); | |
1063 | if (len < 0) | |
1064 | return -1; | |
1065 | ||
1066 | if (strncmp (own_buf, "qSymbol:", strlen ("qSymbol:")) != 0) | |
1067 | { | |
1068 | /* Malformed response. */ | |
1069 | if (remote_debug) | |
0d62e5e8 DJ |
1070 | { |
1071 | fprintf (stderr, "Malformed response to qSymbol, ignoring.\n"); | |
1072 | fflush (stderr); | |
1073 | } | |
1074 | ||
2f2893d9 DJ |
1075 | return -1; |
1076 | } | |
1077 | ||
1078 | p = own_buf + strlen ("qSymbol:"); | |
1079 | q = p; | |
1080 | while (*q && *q != ':') | |
1081 | q++; | |
1082 | ||
1083 | /* Make sure we found a value for the symbol. */ | |
1084 | if (p == q || *q == '\0') | |
1085 | return 0; | |
1086 | ||
1087 | decode_address (addrp, p, q - p); | |
fd500816 DJ |
1088 | |
1089 | /* Save the symbol in our cache. */ | |
1090 | sym = malloc (sizeof (*sym)); | |
1091 | sym->name = strdup (name); | |
1092 | sym->addr = *addrp; | |
1093 | sym->next = symbol_cache; | |
1094 | symbol_cache = sym; | |
1095 | ||
2f2893d9 DJ |
1096 | return 1; |
1097 | } | |
c74d0ad8 DJ |
1098 | |
1099 | void | |
bce7165d | 1100 | monitor_output (const char *msg) |
c74d0ad8 DJ |
1101 | { |
1102 | char *buf = malloc (strlen (msg) * 2 + 2); | |
1103 | ||
1104 | buf[0] = 'O'; | |
1105 | hexify (buf + 1, msg, 0); | |
1106 | ||
1107 | putpkt (buf); | |
1108 | free (buf); | |
1109 | } |