Commit | Line | Data |
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c906108c | 1 | /* Remote utility routines for the remote server for GDB. |
6f0f660e | 2 | Copyright (C) 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
ea025f5f | 3 | 2002, 2003, 2004, 2005, 2006 |
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 | |
6f0f660e EZ |
20 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
c906108c SS |
22 | |
23 | #include "server.h" | |
b80864fb | 24 | #if HAVE_TERMINAL_H |
c906108c | 25 | #include "terminal.h" |
b80864fb | 26 | #endif |
c906108c SS |
27 | #include <stdio.h> |
28 | #include <string.h> | |
b80864fb | 29 | #if HAVE_SYS_IOCTL_H |
c906108c | 30 | #include <sys/ioctl.h> |
b80864fb | 31 | #endif |
c906108c | 32 | #include <sys/file.h> |
b80864fb | 33 | #if HAVE_NETINET_IN_H |
c906108c | 34 | #include <netinet/in.h> |
b80864fb DJ |
35 | #endif |
36 | #if HAVE_SYS_SOCKET_H | |
c906108c | 37 | #include <sys/socket.h> |
b80864fb DJ |
38 | #endif |
39 | #if HAVE_NETDB_H | |
c906108c | 40 | #include <netdb.h> |
b80864fb DJ |
41 | #endif |
42 | #if HAVE_NETINET_TCP_H | |
c906108c | 43 | #include <netinet/tcp.h> |
b80864fb DJ |
44 | #endif |
45 | #if HAVE_SYS_IOCTL_H | |
c906108c | 46 | #include <sys/ioctl.h> |
b80864fb | 47 | #endif |
c906108c SS |
48 | #include <signal.h> |
49 | #include <fcntl.h> | |
cf30a8e1 C |
50 | #include <sys/time.h> |
51 | #include <unistd.h> | |
b80864fb | 52 | #if HAVE_ARPA_INET_H |
0729219d | 53 | #include <arpa/inet.h> |
b80864fb DJ |
54 | #endif |
55 | ||
56 | #if USE_WIN32API | |
57 | #include <winsock.h> | |
58 | #endif | |
c906108c | 59 | |
f450004a DJ |
60 | #ifndef HAVE_SOCKLEN_T |
61 | typedef int socklen_t; | |
62 | #endif | |
63 | ||
fd500816 DJ |
64 | /* A cache entry for a successfully looked-up symbol. */ |
65 | struct sym_cache | |
66 | { | |
67 | const char *name; | |
68 | CORE_ADDR addr; | |
69 | struct sym_cache *next; | |
70 | }; | |
71 | ||
72 | /* The symbol cache. */ | |
73 | static struct sym_cache *symbol_cache; | |
74 | ||
ea025f5f DJ |
75 | /* If this flag has been set, assume cache misses are |
76 | failures. */ | |
77 | int all_symbols_looked_up; | |
78 | ||
c906108c | 79 | int remote_debug = 0; |
03863182 | 80 | struct ui_file *gdb_stdlog; |
c906108c SS |
81 | |
82 | static int remote_desc; | |
83 | ||
0d62e5e8 DJ |
84 | /* FIXME headerize? */ |
85 | extern int using_threads; | |
86 | extern int debug_threads; | |
87 | ||
c906108c SS |
88 | /* Open a connection to a remote debugger. |
89 | NAME is the filename used for communication. */ | |
90 | ||
91 | void | |
fba45db2 | 92 | remote_open (char *name) |
c906108c | 93 | { |
b80864fb | 94 | #if defined(F_SETFL) && defined (FASYNC) |
c906108c | 95 | int save_fcntl_flags; |
b80864fb | 96 | #endif |
e641a1ca | 97 | |
c906108c SS |
98 | if (!strchr (name, ':')) |
99 | { | |
b80864fb DJ |
100 | #ifdef USE_WIN32API |
101 | error ("Only <host>:<port> is supported on this platform."); | |
102 | #else | |
c906108c SS |
103 | remote_desc = open (name, O_RDWR); |
104 | if (remote_desc < 0) | |
105 | perror_with_name ("Could not open remote device"); | |
106 | ||
107 | #ifdef HAVE_TERMIOS | |
108 | { | |
109 | struct termios termios; | |
c5aa993b | 110 | tcgetattr (remote_desc, &termios); |
c906108c SS |
111 | |
112 | termios.c_iflag = 0; | |
113 | termios.c_oflag = 0; | |
114 | termios.c_lflag = 0; | |
c5aa993b | 115 | termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 116 | termios.c_cflag |= CLOCAL | CS8; |
d0608e50 | 117 | termios.c_cc[VMIN] = 1; |
c906108c SS |
118 | termios.c_cc[VTIME] = 0; |
119 | ||
c5aa993b | 120 | tcsetattr (remote_desc, TCSANOW, &termios); |
c906108c SS |
121 | } |
122 | #endif | |
123 | ||
124 | #ifdef HAVE_TERMIO | |
125 | { | |
126 | struct termio termio; | |
127 | ioctl (remote_desc, TCGETA, &termio); | |
128 | ||
129 | termio.c_iflag = 0; | |
130 | termio.c_oflag = 0; | |
131 | termio.c_lflag = 0; | |
c5aa993b | 132 | termio.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 133 | termio.c_cflag |= CLOCAL | CS8; |
d0608e50 | 134 | termio.c_cc[VMIN] = 1; |
c906108c SS |
135 | termio.c_cc[VTIME] = 0; |
136 | ||
137 | ioctl (remote_desc, TCSETA, &termio); | |
138 | } | |
139 | #endif | |
140 | ||
141 | #ifdef HAVE_SGTTY | |
142 | { | |
143 | struct sgttyb sg; | |
144 | ||
145 | ioctl (remote_desc, TIOCGETP, &sg); | |
146 | sg.sg_flags = RAW; | |
147 | ioctl (remote_desc, TIOCSETP, &sg); | |
148 | } | |
149 | #endif | |
150 | ||
e641a1ca | 151 | fprintf (stderr, "Remote debugging using %s\n", name); |
b80864fb | 152 | #endif /* USE_WIN32API */ |
c906108c SS |
153 | } |
154 | else | |
155 | { | |
b80864fb DJ |
156 | #ifdef USE_WIN32API |
157 | static int winsock_initialized; | |
158 | #endif | |
c906108c SS |
159 | char *port_str; |
160 | int port; | |
161 | struct sockaddr_in sockaddr; | |
f450004a | 162 | socklen_t tmp; |
c906108c SS |
163 | int tmp_desc; |
164 | ||
165 | port_str = strchr (name, ':'); | |
166 | ||
167 | port = atoi (port_str + 1); | |
168 | ||
b80864fb DJ |
169 | #ifdef USE_WIN32API |
170 | if (!winsock_initialized) | |
171 | { | |
172 | WSADATA wsad; | |
173 | ||
174 | WSAStartup (MAKEWORD (1, 0), &wsad); | |
175 | winsock_initialized = 1; | |
176 | } | |
177 | #endif | |
178 | ||
179 | tmp_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); | |
c906108c SS |
180 | if (tmp_desc < 0) |
181 | perror_with_name ("Can't open socket"); | |
182 | ||
183 | /* Allow rapid reuse of this port. */ | |
184 | tmp = 1; | |
c5aa993b JM |
185 | setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, |
186 | sizeof (tmp)); | |
c906108c SS |
187 | |
188 | sockaddr.sin_family = PF_INET; | |
c5aa993b | 189 | sockaddr.sin_port = htons (port); |
c906108c SS |
190 | sockaddr.sin_addr.s_addr = INADDR_ANY; |
191 | ||
c5aa993b | 192 | if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
c906108c SS |
193 | || listen (tmp_desc, 1)) |
194 | perror_with_name ("Can't bind address"); | |
195 | ||
6910d122 | 196 | fprintf (stderr, "Listening on port %d\n", port); |
b80864fb | 197 | fflush (stderr); |
6910d122 | 198 | |
c906108c | 199 | tmp = sizeof (sockaddr); |
c5aa993b | 200 | remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp); |
c906108c SS |
201 | if (remote_desc == -1) |
202 | perror_with_name ("Accept failed"); | |
203 | ||
c906108c SS |
204 | /* Enable TCP keep alive process. */ |
205 | tmp = 1; | |
c5aa993b | 206 | setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp)); |
c906108c SS |
207 | |
208 | /* Tell TCP not to delay small packets. This greatly speeds up | |
c5aa993b | 209 | interactive response. */ |
c906108c | 210 | tmp = 1; |
373fe97f | 211 | setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY, |
c5aa993b | 212 | (char *) &tmp, sizeof (tmp)); |
c906108c | 213 | |
b80864fb DJ |
214 | |
215 | #ifndef USE_WIN32API | |
c906108c SS |
216 | close (tmp_desc); /* No longer need this */ |
217 | ||
c5aa993b JM |
218 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply |
219 | exits when the remote side dies. */ | |
b80864fb DJ |
220 | #else |
221 | closesocket (tmp_desc); /* No longer need this */ | |
222 | #endif | |
e641a1ca ML |
223 | |
224 | /* Convert IP address to string. */ | |
225 | fprintf (stderr, "Remote debugging from host %s\n", | |
226 | inet_ntoa (sockaddr.sin_addr)); | |
c906108c SS |
227 | } |
228 | ||
229 | #if defined(F_SETFL) && defined (FASYNC) | |
230 | save_fcntl_flags = fcntl (remote_desc, F_GETFL, 0); | |
231 | fcntl (remote_desc, F_SETFL, save_fcntl_flags | FASYNC); | |
cf30a8e1 C |
232 | #if defined (F_SETOWN) |
233 | fcntl (remote_desc, F_SETOWN, getpid ()); | |
94dfea5d | 234 | #endif |
cf30a8e1 | 235 | #endif |
c906108c | 236 | disable_async_io (); |
c906108c SS |
237 | } |
238 | ||
239 | void | |
fba45db2 | 240 | remote_close (void) |
c906108c | 241 | { |
b80864fb DJ |
242 | #ifdef USE_WIN32API |
243 | closesocket (remote_desc); | |
244 | #else | |
c906108c | 245 | close (remote_desc); |
b80864fb | 246 | #endif |
c906108c SS |
247 | } |
248 | ||
249 | /* Convert hex digit A to a number. */ | |
250 | ||
251 | static int | |
fba45db2 | 252 | fromhex (int a) |
c906108c SS |
253 | { |
254 | if (a >= '0' && a <= '9') | |
255 | return a - '0'; | |
256 | else if (a >= 'a' && a <= 'f') | |
257 | return a - 'a' + 10; | |
258 | else | |
259 | error ("Reply contains invalid hex digit"); | |
0a30fbc4 | 260 | return 0; |
c906108c SS |
261 | } |
262 | ||
ce3a066d DJ |
263 | int |
264 | unhexify (char *bin, const char *hex, int count) | |
265 | { | |
266 | int i; | |
267 | ||
268 | for (i = 0; i < count; i++) | |
269 | { | |
270 | if (hex[0] == 0 || hex[1] == 0) | |
271 | { | |
272 | /* Hex string is short, or of uneven length. | |
273 | Return the count that has been converted so far. */ | |
274 | return i; | |
275 | } | |
276 | *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); | |
277 | hex += 2; | |
278 | } | |
279 | return i; | |
280 | } | |
281 | ||
dae5f5cf | 282 | void |
2f2893d9 DJ |
283 | decode_address (CORE_ADDR *addrp, const char *start, int len) |
284 | { | |
285 | CORE_ADDR addr; | |
286 | char ch; | |
287 | int i; | |
288 | ||
289 | addr = 0; | |
290 | for (i = 0; i < len; i++) | |
291 | { | |
292 | ch = start[i]; | |
293 | addr = addr << 4; | |
294 | addr = addr | (fromhex (ch) & 0x0f); | |
295 | } | |
296 | *addrp = addr; | |
297 | } | |
298 | ||
89be2091 DJ |
299 | const char * |
300 | decode_address_to_semicolon (CORE_ADDR *addrp, const char *start) | |
301 | { | |
302 | const char *end; | |
303 | ||
304 | end = start; | |
305 | while (*end != '\0' && *end != ';') | |
306 | end++; | |
307 | ||
308 | decode_address (addrp, start, end - start); | |
309 | ||
310 | if (*end == ';') | |
311 | end++; | |
312 | return end; | |
313 | } | |
314 | ||
c906108c SS |
315 | /* Convert number NIB to a hex digit. */ |
316 | ||
317 | static int | |
fba45db2 | 318 | tohex (int nib) |
c906108c SS |
319 | { |
320 | if (nib < 10) | |
321 | return '0' + nib; | |
322 | else | |
323 | return 'a' + nib - 10; | |
324 | } | |
325 | ||
ce3a066d DJ |
326 | int |
327 | hexify (char *hex, const char *bin, int count) | |
328 | { | |
329 | int i; | |
330 | ||
331 | /* May use a length, or a nul-terminated string as input. */ | |
332 | if (count == 0) | |
333 | count = strlen (bin); | |
334 | ||
335 | for (i = 0; i < count; i++) | |
336 | { | |
337 | *hex++ = tohex ((*bin >> 4) & 0xf); | |
338 | *hex++ = tohex (*bin++ & 0xf); | |
339 | } | |
340 | *hex = 0; | |
341 | return i; | |
342 | } | |
343 | ||
01f9e8fa DJ |
344 | /* Convert BUFFER, binary data at least LEN bytes long, into escaped |
345 | binary data in OUT_BUF. Set *OUT_LEN to the length of the data | |
346 | encoded in OUT_BUF, and return the number of bytes in OUT_BUF | |
347 | (which may be more than *OUT_LEN due to escape characters). The | |
348 | total number of bytes in the output buffer will be at most | |
349 | OUT_MAXLEN. */ | |
350 | ||
351 | int | |
352 | remote_escape_output (const gdb_byte *buffer, int len, | |
353 | gdb_byte *out_buf, int *out_len, | |
354 | int out_maxlen) | |
355 | { | |
356 | int input_index, output_index; | |
357 | ||
358 | output_index = 0; | |
359 | for (input_index = 0; input_index < len; input_index++) | |
360 | { | |
361 | gdb_byte b = buffer[input_index]; | |
362 | ||
363 | if (b == '$' || b == '#' || b == '}' || b == '*') | |
364 | { | |
365 | /* These must be escaped. */ | |
366 | if (output_index + 2 > out_maxlen) | |
367 | break; | |
368 | out_buf[output_index++] = '}'; | |
369 | out_buf[output_index++] = b ^ 0x20; | |
370 | } | |
371 | else | |
372 | { | |
373 | if (output_index + 1 > out_maxlen) | |
374 | break; | |
375 | out_buf[output_index++] = b; | |
376 | } | |
377 | } | |
378 | ||
379 | *out_len = input_index; | |
380 | return output_index; | |
381 | } | |
382 | ||
383 | /* Convert BUFFER, escaped data LEN bytes long, into binary data | |
384 | in OUT_BUF. Return the number of bytes written to OUT_BUF. | |
385 | Raise an error if the total number of bytes exceeds OUT_MAXLEN. | |
386 | ||
387 | This function reverses remote_escape_output. It allows more | |
388 | escaped characters than that function does, in particular because | |
389 | '*' must be escaped to avoid the run-length encoding processing | |
390 | in reading packets. */ | |
391 | ||
392 | static int | |
393 | remote_unescape_input (const gdb_byte *buffer, int len, | |
394 | gdb_byte *out_buf, int out_maxlen) | |
395 | { | |
396 | int input_index, output_index; | |
397 | int escaped; | |
398 | ||
399 | output_index = 0; | |
400 | escaped = 0; | |
401 | for (input_index = 0; input_index < len; input_index++) | |
402 | { | |
403 | gdb_byte b = buffer[input_index]; | |
404 | ||
405 | if (output_index + 1 > out_maxlen) | |
406 | error ("Received too much data from the target."); | |
407 | ||
408 | if (escaped) | |
409 | { | |
410 | out_buf[output_index++] = b ^ 0x20; | |
411 | escaped = 0; | |
412 | } | |
413 | else if (b == '}') | |
414 | escaped = 1; | |
415 | else | |
416 | out_buf[output_index++] = b; | |
417 | } | |
418 | ||
419 | if (escaped) | |
420 | error ("Unmatched escape character in target response."); | |
421 | ||
422 | return output_index; | |
423 | } | |
424 | ||
5ffff7c1 DJ |
425 | /* Look for a sequence of characters which can be run-length encoded. |
426 | If there are any, update *CSUM and *P. Otherwise, output the | |
427 | single character. Return the number of characters consumed. */ | |
428 | ||
429 | static int | |
430 | try_rle (char *buf, int remaining, unsigned char *csum, char **p) | |
431 | { | |
432 | int n; | |
433 | ||
434 | /* Always output the character. */ | |
435 | *csum += buf[0]; | |
436 | *(*p)++ = buf[0]; | |
437 | ||
438 | /* Don't go past '~'. */ | |
439 | if (remaining > 97) | |
440 | remaining = 97; | |
441 | ||
442 | for (n = 1; n < remaining; n++) | |
443 | if (buf[n] != buf[0]) | |
444 | break; | |
445 | ||
446 | /* N is the index of the first character not the same as buf[0]. | |
447 | buf[0] is counted twice, so by decrementing N, we get the number | |
448 | of characters the RLE sequence will replace. */ | |
449 | n--; | |
450 | ||
451 | if (n < 3) | |
452 | return 1; | |
453 | ||
454 | /* Skip the frame characters. The manual says to skip '+' and '-' | |
455 | also, but there's no reason to. Unfortunately these two unusable | |
456 | characters double the encoded length of a four byte zero | |
457 | value. */ | |
458 | while (n + 29 == '$' || n + 29 == '#') | |
459 | n--; | |
460 | ||
461 | *csum += '*'; | |
462 | *(*p)++ = '*'; | |
463 | *csum += n + 29; | |
464 | *(*p)++ = n + 29; | |
465 | ||
466 | return n + 1; | |
467 | } | |
468 | ||
c906108c | 469 | /* Send a packet to the remote machine, with error checking. |
01f9e8fa DJ |
470 | The data of the packet is in BUF, and the length of the |
471 | packet is in CNT. Returns >= 0 on success, -1 otherwise. */ | |
c906108c SS |
472 | |
473 | int | |
01f9e8fa | 474 | putpkt_binary (char *buf, int cnt) |
c906108c SS |
475 | { |
476 | int i; | |
477 | unsigned char csum = 0; | |
0a30fbc4 | 478 | char *buf2; |
c906108c | 479 | char buf3[1]; |
c906108c SS |
480 | char *p; |
481 | ||
0a30fbc4 DJ |
482 | buf2 = malloc (PBUFSIZ); |
483 | ||
c906108c SS |
484 | /* Copy the packet into buffer BUF2, encapsulating it |
485 | and giving it a checksum. */ | |
486 | ||
487 | p = buf2; | |
488 | *p++ = '$'; | |
489 | ||
5ffff7c1 DJ |
490 | for (i = 0; i < cnt;) |
491 | i += try_rle (buf + i, cnt - i, &csum, &p); | |
492 | ||
c906108c SS |
493 | *p++ = '#'; |
494 | *p++ = tohex ((csum >> 4) & 0xf); | |
495 | *p++ = tohex (csum & 0xf); | |
496 | ||
497 | *p = '\0'; | |
498 | ||
499 | /* Send it over and over until we get a positive ack. */ | |
500 | ||
501 | do | |
502 | { | |
503 | int cc; | |
504 | ||
b80864fb | 505 | if (send (remote_desc, buf2, p - buf2, 0) != p - buf2) |
c906108c SS |
506 | { |
507 | perror ("putpkt(write)"); | |
508 | return -1; | |
509 | } | |
510 | ||
511 | if (remote_debug) | |
0d62e5e8 DJ |
512 | { |
513 | fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2); | |
514 | fflush (stderr); | |
515 | } | |
b80864fb | 516 | cc = recv (remote_desc, buf3, 1, 0); |
c906108c | 517 | if (remote_debug) |
0d62e5e8 DJ |
518 | { |
519 | fprintf (stderr, "[received '%c' (0x%x)]\n", buf3[0], buf3[0]); | |
520 | fflush (stderr); | |
521 | } | |
522 | ||
c906108c SS |
523 | if (cc <= 0) |
524 | { | |
525 | if (cc == 0) | |
526 | fprintf (stderr, "putpkt(read): Got EOF\n"); | |
527 | else | |
528 | perror ("putpkt(read)"); | |
529 | ||
0a30fbc4 | 530 | free (buf2); |
c906108c SS |
531 | return -1; |
532 | } | |
0d62e5e8 DJ |
533 | |
534 | /* Check for an input interrupt while we're here. */ | |
535 | if (buf3[0] == '\003') | |
e5379b03 | 536 | (*the_target->send_signal) (SIGINT); |
c906108c SS |
537 | } |
538 | while (buf3[0] != '+'); | |
539 | ||
0a30fbc4 | 540 | free (buf2); |
c906108c SS |
541 | return 1; /* Success! */ |
542 | } | |
543 | ||
01f9e8fa DJ |
544 | /* Send a packet to the remote machine, with error checking. The data |
545 | of the packet is in BUF, and the packet should be a NUL-terminated | |
546 | string. Returns >= 0 on success, -1 otherwise. */ | |
547 | ||
548 | int | |
549 | putpkt (char *buf) | |
550 | { | |
551 | return putpkt_binary (buf, strlen (buf)); | |
552 | } | |
553 | ||
b80864fb | 554 | #ifndef USE_WIN32API |
01f9e8fa | 555 | |
c906108c SS |
556 | /* Come here when we get an input interrupt from the remote side. This |
557 | interrupt should only be active while we are waiting for the child to do | |
558 | something. About the only thing that should come through is a ^C, which | |
559 | will cause us to send a SIGINT to the child. */ | |
560 | ||
561 | static void | |
0a30fbc4 | 562 | input_interrupt (int unused) |
c906108c | 563 | { |
cf30a8e1 C |
564 | fd_set readset; |
565 | struct timeval immediate = { 0, 0 }; | |
c906108c | 566 | |
cf30a8e1 C |
567 | /* Protect against spurious interrupts. This has been observed to |
568 | be a problem under NetBSD 1.4 and 1.5. */ | |
c906108c | 569 | |
cf30a8e1 C |
570 | FD_ZERO (&readset); |
571 | FD_SET (remote_desc, &readset); | |
572 | if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) | |
c906108c | 573 | { |
cf30a8e1 | 574 | int cc; |
fd500816 | 575 | char c = 0; |
cf30a8e1 | 576 | |
b80864fb | 577 | cc = recv (remote_desc, &c, 1, 0); |
c906108c | 578 | |
cf30a8e1 C |
579 | if (cc != 1 || c != '\003') |
580 | { | |
fd500816 DJ |
581 | fprintf (stderr, "input_interrupt, count = %d c = %d ('%c')\n", |
582 | cc, c, c); | |
cf30a8e1 C |
583 | return; |
584 | } | |
585 | ||
e5379b03 | 586 | (*the_target->send_signal) (SIGINT); |
cf30a8e1 | 587 | } |
c906108c | 588 | } |
b80864fb DJ |
589 | #endif |
590 | ||
591 | /* Asynchronous I/O support. SIGIO must be enabled when waiting, in order to | |
592 | accept Control-C from the client, and must be disabled when talking to | |
593 | the client. */ | |
c906108c | 594 | |
62ea82f5 DJ |
595 | void |
596 | block_async_io (void) | |
597 | { | |
b80864fb | 598 | #ifndef USE_WIN32API |
62ea82f5 DJ |
599 | sigset_t sigio_set; |
600 | sigemptyset (&sigio_set); | |
601 | sigaddset (&sigio_set, SIGIO); | |
602 | sigprocmask (SIG_BLOCK, &sigio_set, NULL); | |
b80864fb | 603 | #endif |
62ea82f5 DJ |
604 | } |
605 | ||
606 | void | |
607 | unblock_async_io (void) | |
608 | { | |
b80864fb | 609 | #ifndef USE_WIN32API |
62ea82f5 DJ |
610 | sigset_t sigio_set; |
611 | sigemptyset (&sigio_set); | |
612 | sigaddset (&sigio_set, SIGIO); | |
613 | sigprocmask (SIG_UNBLOCK, &sigio_set, NULL); | |
b80864fb | 614 | #endif |
62ea82f5 DJ |
615 | } |
616 | ||
fd500816 DJ |
617 | /* Current state of asynchronous I/O. */ |
618 | static int async_io_enabled; | |
619 | ||
620 | /* Enable asynchronous I/O. */ | |
c906108c | 621 | void |
fba45db2 | 622 | enable_async_io (void) |
c906108c | 623 | { |
fd500816 DJ |
624 | if (async_io_enabled) |
625 | return; | |
626 | ||
b80864fb | 627 | #ifndef USE_WIN32API |
c906108c | 628 | signal (SIGIO, input_interrupt); |
b80864fb | 629 | #endif |
fd500816 | 630 | async_io_enabled = 1; |
c906108c SS |
631 | } |
632 | ||
fd500816 | 633 | /* Disable asynchronous I/O. */ |
c906108c | 634 | void |
fba45db2 | 635 | disable_async_io (void) |
c906108c | 636 | { |
fd500816 DJ |
637 | if (!async_io_enabled) |
638 | return; | |
639 | ||
b80864fb | 640 | #ifndef USE_WIN32API |
c906108c | 641 | signal (SIGIO, SIG_IGN); |
b80864fb | 642 | #endif |
fd500816 | 643 | async_io_enabled = 0; |
c906108c SS |
644 | } |
645 | ||
646 | /* Returns next char from remote GDB. -1 if error. */ | |
647 | ||
648 | static int | |
fba45db2 | 649 | readchar (void) |
c906108c | 650 | { |
01f9e8fa | 651 | static unsigned char buf[BUFSIZ]; |
c906108c | 652 | static int bufcnt = 0; |
01f9e8fa | 653 | static unsigned char *bufp; |
c906108c SS |
654 | |
655 | if (bufcnt-- > 0) | |
01f9e8fa | 656 | return *bufp++; |
c906108c | 657 | |
b80864fb | 658 | bufcnt = recv (remote_desc, buf, sizeof (buf), 0); |
c906108c SS |
659 | |
660 | if (bufcnt <= 0) | |
661 | { | |
662 | if (bufcnt == 0) | |
663 | fprintf (stderr, "readchar: Got EOF\n"); | |
664 | else | |
665 | perror ("readchar"); | |
666 | ||
667 | return -1; | |
668 | } | |
669 | ||
670 | bufp = buf; | |
671 | bufcnt--; | |
672 | return *bufp++ & 0x7f; | |
673 | } | |
674 | ||
675 | /* Read a packet from the remote machine, with error checking, | |
676 | and store it in BUF. Returns length of packet, or negative if error. */ | |
677 | ||
678 | int | |
fba45db2 | 679 | getpkt (char *buf) |
c906108c SS |
680 | { |
681 | char *bp; | |
682 | unsigned char csum, c1, c2; | |
683 | int c; | |
684 | ||
685 | while (1) | |
686 | { | |
687 | csum = 0; | |
688 | ||
689 | while (1) | |
690 | { | |
691 | c = readchar (); | |
692 | if (c == '$') | |
693 | break; | |
694 | if (remote_debug) | |
0d62e5e8 DJ |
695 | { |
696 | fprintf (stderr, "[getpkt: discarding char '%c']\n", c); | |
697 | fflush (stderr); | |
698 | } | |
699 | ||
c906108c SS |
700 | if (c < 0) |
701 | return -1; | |
702 | } | |
703 | ||
704 | bp = buf; | |
705 | while (1) | |
706 | { | |
707 | c = readchar (); | |
708 | if (c < 0) | |
709 | return -1; | |
710 | if (c == '#') | |
711 | break; | |
712 | *bp++ = c; | |
713 | csum += c; | |
714 | } | |
715 | *bp = 0; | |
716 | ||
717 | c1 = fromhex (readchar ()); | |
718 | c2 = fromhex (readchar ()); | |
c5aa993b | 719 | |
c906108c SS |
720 | if (csum == (c1 << 4) + c2) |
721 | break; | |
722 | ||
723 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", | |
724 | (c1 << 4) + c2, csum, buf); | |
b80864fb | 725 | send (remote_desc, "-", 1, 0); |
c906108c SS |
726 | } |
727 | ||
728 | if (remote_debug) | |
0d62e5e8 DJ |
729 | { |
730 | fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf); | |
731 | fflush (stderr); | |
732 | } | |
c906108c | 733 | |
b80864fb | 734 | send (remote_desc, "+", 1, 0); |
c906108c SS |
735 | |
736 | if (remote_debug) | |
0d62e5e8 DJ |
737 | { |
738 | fprintf (stderr, "[sent ack]\n"); | |
739 | fflush (stderr); | |
740 | } | |
741 | ||
c906108c SS |
742 | return bp - buf; |
743 | } | |
744 | ||
745 | void | |
fba45db2 | 746 | write_ok (char *buf) |
c906108c SS |
747 | { |
748 | buf[0] = 'O'; | |
749 | buf[1] = 'K'; | |
750 | buf[2] = '\0'; | |
751 | } | |
752 | ||
753 | void | |
fba45db2 | 754 | write_enn (char *buf) |
c906108c | 755 | { |
c89dc5d4 | 756 | /* Some day, we should define the meanings of the error codes... */ |
c906108c | 757 | buf[0] = 'E'; |
c89dc5d4 DJ |
758 | buf[1] = '0'; |
759 | buf[2] = '1'; | |
c906108c SS |
760 | buf[3] = '\0'; |
761 | } | |
762 | ||
763 | void | |
f450004a | 764 | convert_int_to_ascii (unsigned char *from, char *to, int n) |
c906108c SS |
765 | { |
766 | int nib; | |
f450004a | 767 | int ch; |
c906108c SS |
768 | while (n--) |
769 | { | |
770 | ch = *from++; | |
771 | nib = ((ch & 0xf0) >> 4) & 0x0f; | |
772 | *to++ = tohex (nib); | |
773 | nib = ch & 0x0f; | |
774 | *to++ = tohex (nib); | |
775 | } | |
776 | *to++ = 0; | |
777 | } | |
778 | ||
779 | ||
780 | void | |
f450004a | 781 | convert_ascii_to_int (char *from, unsigned char *to, int n) |
c906108c SS |
782 | { |
783 | int nib1, nib2; | |
784 | while (n--) | |
785 | { | |
786 | nib1 = fromhex (*from++); | |
787 | nib2 = fromhex (*from++); | |
788 | *to++ = (((nib1 & 0x0f) << 4) & 0xf0) | (nib2 & 0x0f); | |
789 | } | |
790 | } | |
791 | ||
792 | static char * | |
fba45db2 | 793 | outreg (int regno, char *buf) |
c906108c | 794 | { |
5c44784c JM |
795 | if ((regno >> 12) != 0) |
796 | *buf++ = tohex ((regno >> 12) & 0xf); | |
797 | if ((regno >> 8) != 0) | |
798 | *buf++ = tohex ((regno >> 8) & 0xf); | |
799 | *buf++ = tohex ((regno >> 4) & 0xf); | |
c906108c SS |
800 | *buf++ = tohex (regno & 0xf); |
801 | *buf++ = ':'; | |
0d62e5e8 DJ |
802 | collect_register_as_string (regno, buf); |
803 | buf += 2 * register_size (regno); | |
c906108c SS |
804 | *buf++ = ';'; |
805 | ||
806 | return buf; | |
807 | } | |
808 | ||
0d62e5e8 DJ |
809 | void |
810 | new_thread_notify (int id) | |
811 | { | |
812 | char own_buf[256]; | |
813 | ||
814 | /* The `n' response is not yet part of the remote protocol. Do nothing. */ | |
815 | if (1) | |
816 | return; | |
817 | ||
818 | if (server_waiting == 0) | |
819 | return; | |
820 | ||
821 | sprintf (own_buf, "n%x", id); | |
822 | disable_async_io (); | |
823 | putpkt (own_buf); | |
824 | enable_async_io (); | |
825 | } | |
826 | ||
827 | void | |
828 | dead_thread_notify (int id) | |
829 | { | |
830 | char own_buf[256]; | |
831 | ||
832 | /* The `x' response is not yet part of the remote protocol. Do nothing. */ | |
833 | if (1) | |
834 | return; | |
835 | ||
836 | sprintf (own_buf, "x%x", id); | |
837 | disable_async_io (); | |
838 | putpkt (own_buf); | |
839 | enable_async_io (); | |
840 | } | |
841 | ||
c906108c | 842 | void |
b80864fb | 843 | prepare_resume_reply (char *buf, char status, unsigned char sig) |
c906108c | 844 | { |
b80864fb | 845 | int nib; |
c906108c SS |
846 | |
847 | *buf++ = status; | |
848 | ||
0e98d0a7 | 849 | nib = ((sig & 0xf0) >> 4); |
c906108c | 850 | *buf++ = tohex (nib); |
0e98d0a7 | 851 | nib = sig & 0x0f; |
c906108c SS |
852 | *buf++ = tohex (nib); |
853 | ||
854 | if (status == 'T') | |
855 | { | |
0a30fbc4 | 856 | const char **regp = gdbserver_expedite_regs; |
e013ee27 OF |
857 | |
858 | if (the_target->stopped_by_watchpoint != NULL | |
859 | && (*the_target->stopped_by_watchpoint) ()) | |
860 | { | |
861 | CORE_ADDR addr; | |
862 | int i; | |
863 | ||
864 | strncpy (buf, "watch:", 6); | |
865 | buf += 6; | |
866 | ||
867 | addr = (*the_target->stopped_data_address) (); | |
868 | ||
869 | /* Convert each byte of the address into two hexadecimal chars. | |
870 | Note that we take sizeof (void *) instead of sizeof (addr); | |
871 | this is to avoid sending a 64-bit address to a 32-bit GDB. */ | |
872 | for (i = sizeof (void *) * 2; i > 0; i--) | |
873 | { | |
874 | *buf++ = tohex ((addr >> (i - 1) * 4) & 0xf); | |
875 | } | |
876 | *buf++ = ';'; | |
877 | } | |
878 | ||
0a30fbc4 | 879 | while (*regp) |
5c44784c | 880 | { |
0a30fbc4 DJ |
881 | buf = outreg (find_regno (*regp), buf); |
882 | regp ++; | |
5c44784c | 883 | } |
c906108c | 884 | |
0d62e5e8 DJ |
885 | /* Formerly, if the debugger had not used any thread features we would not |
886 | burden it with a thread status response. This was for the benefit of | |
887 | GDB 4.13 and older. However, in recent GDB versions the check | |
888 | (``if (cont_thread != 0)'') does not have the desired effect because of | |
889 | sillyness in the way that the remote protocol handles specifying a thread. | |
890 | Since thread support relies on qSymbol support anyway, assume GDB can handle | |
891 | threads. */ | |
892 | ||
893 | if (using_threads) | |
c906108c | 894 | { |
b92a518e DJ |
895 | unsigned int gdb_id_from_wait; |
896 | ||
0d62e5e8 DJ |
897 | /* FIXME right place to set this? */ |
898 | thread_from_wait = ((struct inferior_list_entry *)current_inferior)->id; | |
b92a518e | 899 | gdb_id_from_wait = thread_to_gdb_id (current_inferior); |
a06660f7 | 900 | |
0d62e5e8 | 901 | if (debug_threads) |
a1928bad | 902 | fprintf (stderr, "Writing resume reply for %ld\n\n", thread_from_wait); |
89a208da DJ |
903 | /* This if (1) ought to be unnecessary. But remote_wait in GDB |
904 | will claim this event belongs to inferior_ptid if we do not | |
905 | specify a thread, and there's no way for gdbserver to know | |
906 | what inferior_ptid is. */ | |
907 | if (1 || old_thread_from_wait != thread_from_wait) | |
c906108c | 908 | { |
0d62e5e8 | 909 | general_thread = thread_from_wait; |
a06660f7 | 910 | sprintf (buf, "thread:%x;", gdb_id_from_wait); |
c906108c SS |
911 | buf += strlen (buf); |
912 | old_thread_from_wait = thread_from_wait; | |
913 | } | |
914 | } | |
915 | } | |
916 | /* For W and X, we're done. */ | |
917 | *buf++ = 0; | |
918 | } | |
919 | ||
920 | void | |
fba45db2 | 921 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
c906108c SS |
922 | { |
923 | int i = 0, j = 0; | |
924 | char ch; | |
925 | *mem_addr_ptr = *len_ptr = 0; | |
926 | ||
927 | while ((ch = from[i++]) != ',') | |
928 | { | |
929 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
930 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
931 | } | |
932 | ||
933 | for (j = 0; j < 4; j++) | |
934 | { | |
935 | if ((ch = from[i++]) == 0) | |
936 | break; | |
937 | *len_ptr = *len_ptr << 4; | |
938 | *len_ptr |= fromhex (ch) & 0x0f; | |
939 | } | |
940 | } | |
941 | ||
942 | void | |
fba45db2 | 943 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
f450004a | 944 | unsigned char *to) |
c906108c SS |
945 | { |
946 | int i = 0; | |
947 | char ch; | |
948 | *mem_addr_ptr = *len_ptr = 0; | |
949 | ||
950 | while ((ch = from[i++]) != ',') | |
951 | { | |
952 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
953 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
954 | } | |
955 | ||
956 | while ((ch = from[i++]) != ':') | |
957 | { | |
958 | *len_ptr = *len_ptr << 4; | |
959 | *len_ptr |= fromhex (ch) & 0x0f; | |
960 | } | |
961 | ||
962 | convert_ascii_to_int (&from[i++], to, *len_ptr); | |
963 | } | |
2f2893d9 | 964 | |
01f9e8fa DJ |
965 | int |
966 | decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr, | |
967 | unsigned int *len_ptr, unsigned char *to) | |
968 | { | |
969 | int i = 0; | |
970 | char ch; | |
971 | *mem_addr_ptr = *len_ptr = 0; | |
972 | ||
973 | while ((ch = from[i++]) != ',') | |
974 | { | |
975 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
976 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
977 | } | |
978 | ||
979 | while ((ch = from[i++]) != ':') | |
980 | { | |
981 | *len_ptr = *len_ptr << 4; | |
982 | *len_ptr |= fromhex (ch) & 0x0f; | |
983 | } | |
984 | ||
985 | if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i, | |
986 | to, *len_ptr) != *len_ptr) | |
987 | return -1; | |
988 | ||
989 | return 0; | |
990 | } | |
991 | ||
fd500816 DJ |
992 | /* Ask GDB for the address of NAME, and return it in ADDRP if found. |
993 | Returns 1 if the symbol is found, 0 if it is not, -1 on error. */ | |
994 | ||
2f2893d9 DJ |
995 | int |
996 | look_up_one_symbol (const char *name, CORE_ADDR *addrp) | |
997 | { | |
998 | char own_buf[266], *p, *q; | |
999 | int len; | |
fd500816 DJ |
1000 | struct sym_cache *sym; |
1001 | ||
1002 | /* Check the cache first. */ | |
1003 | for (sym = symbol_cache; sym; sym = sym->next) | |
1004 | if (strcmp (name, sym->name) == 0) | |
1005 | { | |
1006 | *addrp = sym->addr; | |
1007 | return 1; | |
1008 | } | |
2f2893d9 | 1009 | |
ea025f5f DJ |
1010 | /* If we've passed the call to thread_db_look_up_symbols, then |
1011 | anything not in the cache must not exist; we're not interested | |
1012 | in any libraries loaded after that point, only in symbols in | |
1013 | libpthread.so. It might not be an appropriate time to look | |
1014 | up a symbol, e.g. while we're trying to fetch registers. */ | |
1015 | if (all_symbols_looked_up) | |
1016 | return 0; | |
1017 | ||
2f2893d9 DJ |
1018 | /* Send the request. */ |
1019 | strcpy (own_buf, "qSymbol:"); | |
1020 | hexify (own_buf + strlen ("qSymbol:"), name, strlen (name)); | |
1021 | if (putpkt (own_buf) < 0) | |
1022 | return -1; | |
1023 | ||
1024 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
1025 | len = getpkt (own_buf); | |
1026 | if (len < 0) | |
1027 | return -1; | |
1028 | ||
1029 | if (strncmp (own_buf, "qSymbol:", strlen ("qSymbol:")) != 0) | |
1030 | { | |
1031 | /* Malformed response. */ | |
1032 | if (remote_debug) | |
0d62e5e8 DJ |
1033 | { |
1034 | fprintf (stderr, "Malformed response to qSymbol, ignoring.\n"); | |
1035 | fflush (stderr); | |
1036 | } | |
1037 | ||
2f2893d9 DJ |
1038 | return -1; |
1039 | } | |
1040 | ||
1041 | p = own_buf + strlen ("qSymbol:"); | |
1042 | q = p; | |
1043 | while (*q && *q != ':') | |
1044 | q++; | |
1045 | ||
1046 | /* Make sure we found a value for the symbol. */ | |
1047 | if (p == q || *q == '\0') | |
1048 | return 0; | |
1049 | ||
1050 | decode_address (addrp, p, q - p); | |
fd500816 DJ |
1051 | |
1052 | /* Save the symbol in our cache. */ | |
1053 | sym = malloc (sizeof (*sym)); | |
1054 | sym->name = strdup (name); | |
1055 | sym->addr = *addrp; | |
1056 | sym->next = symbol_cache; | |
1057 | symbol_cache = sym; | |
1058 | ||
2f2893d9 DJ |
1059 | return 1; |
1060 | } |