Commit | Line | Data |
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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, |
4c38e0a4 | 3 | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
9b254dd1 | 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" | |
5b1c542e | 23 | #include "target.h" |
c906108c SS |
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 | |
12ea4b69 | 66 | #include <winsock2.h> |
b80864fb | 67 | #endif |
c906108c | 68 | |
ac8c974e AR |
69 | #if __QNX__ |
70 | #include <sys/iomgr.h> | |
71 | #endif /* __QNX__ */ | |
72 | ||
f450004a DJ |
73 | #ifndef HAVE_SOCKLEN_T |
74 | typedef int socklen_t; | |
75 | #endif | |
76 | ||
7390519e PA |
77 | #if USE_WIN32API |
78 | # define INVALID_DESCRIPTOR INVALID_SOCKET | |
79 | #else | |
80 | # define INVALID_DESCRIPTOR -1 | |
81 | #endif | |
82 | ||
bc3b5632 DE |
83 | static int readchar (void); |
84 | ||
fd500816 DJ |
85 | /* A cache entry for a successfully looked-up symbol. */ |
86 | struct sym_cache | |
87 | { | |
95954743 | 88 | char *name; |
fd500816 DJ |
89 | CORE_ADDR addr; |
90 | struct sym_cache *next; | |
91 | }; | |
92 | ||
c906108c | 93 | int remote_debug = 0; |
03863182 | 94 | struct ui_file *gdb_stdlog; |
c906108c | 95 | |
7390519e | 96 | static int remote_desc = INVALID_DESCRIPTOR; |
8336d594 | 97 | static int listen_desc = INVALID_DESCRIPTOR; |
c906108c | 98 | |
0d62e5e8 DJ |
99 | /* FIXME headerize? */ |
100 | extern int using_threads; | |
101 | extern int debug_threads; | |
102 | ||
a6f3e723 SL |
103 | /* If true, then GDB has requested noack mode. */ |
104 | int noack_mode = 0; | |
105 | /* If true, then we tell GDB to use noack mode by default. */ | |
106 | int transport_is_reliable = 0; | |
107 | ||
0f48aa01 | 108 | #ifdef USE_WIN32API |
68070c10 PA |
109 | # define read(fd, buf, len) recv (fd, (char *) buf, len, 0) |
110 | # define write(fd, buf, len) send (fd, (char *) buf, len, 0) | |
0f48aa01 DJ |
111 | #endif |
112 | ||
8336d594 PA |
113 | int |
114 | gdb_connected (void) | |
115 | { | |
116 | return remote_desc != INVALID_DESCRIPTOR; | |
117 | } | |
118 | ||
119 | static void | |
120 | enable_async_notification (int fd) | |
121 | { | |
122 | #if defined(F_SETFL) && defined (FASYNC) | |
123 | int save_fcntl_flags; | |
124 | ||
125 | save_fcntl_flags = fcntl (fd, F_GETFL, 0); | |
126 | fcntl (fd, F_SETFL, save_fcntl_flags | FASYNC); | |
127 | #if defined (F_SETOWN) | |
128 | fcntl (fd, F_SETOWN, getpid ()); | |
129 | #endif | |
130 | #endif | |
131 | } | |
132 | ||
133 | static int | |
134 | handle_accept_event (int err, gdb_client_data client_data) | |
135 | { | |
136 | struct sockaddr_in sockaddr; | |
137 | socklen_t tmp; | |
138 | ||
139 | if (debug_threads) | |
140 | fprintf (stderr, "handling possible accept event\n"); | |
141 | ||
142 | tmp = sizeof (sockaddr); | |
143 | remote_desc = accept (listen_desc, (struct sockaddr *) &sockaddr, &tmp); | |
144 | if (remote_desc == -1) | |
145 | perror_with_name ("Accept failed"); | |
146 | ||
147 | /* Enable TCP keep alive process. */ | |
148 | tmp = 1; | |
149 | setsockopt (remote_desc, SOL_SOCKET, SO_KEEPALIVE, | |
150 | (char *) &tmp, sizeof (tmp)); | |
151 | ||
152 | /* Tell TCP not to delay small packets. This greatly speeds up | |
153 | interactive response. */ | |
154 | tmp = 1; | |
155 | setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY, | |
156 | (char *) &tmp, sizeof (tmp)); | |
157 | ||
158 | #ifndef USE_WIN32API | |
159 | close (listen_desc); /* No longer need this */ | |
160 | ||
161 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply | |
162 | exits when the remote side dies. */ | |
163 | #else | |
164 | closesocket (listen_desc); /* No longer need this */ | |
165 | #endif | |
166 | ||
167 | delete_file_handler (listen_desc); | |
168 | ||
169 | /* Convert IP address to string. */ | |
170 | fprintf (stderr, "Remote debugging from host %s\n", | |
171 | inet_ntoa (sockaddr.sin_addr)); | |
172 | ||
173 | enable_async_notification (remote_desc); | |
174 | ||
175 | /* Register the event loop handler. */ | |
176 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
177 | ||
178 | /* We have a new GDB connection now. If we were disconnected | |
179 | tracing, there's a window where the target could report a stop | |
180 | event to the event loop, and since we have a connection now, we'd | |
181 | try to send vStopped notifications to GDB. But, don't do that | |
182 | until GDB as selected all-stop/non-stop, and has queried the | |
183 | threads' status ('?'). */ | |
184 | target_async (0); | |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
c906108c SS |
189 | /* Open a connection to a remote debugger. |
190 | NAME is the filename used for communication. */ | |
191 | ||
192 | void | |
fba45db2 | 193 | remote_open (char *name) |
c906108c | 194 | { |
8264bb58 DJ |
195 | char *port_str; |
196 | ||
197 | port_str = strchr (name, ':'); | |
198 | if (port_str == NULL) | |
c906108c | 199 | { |
b80864fb DJ |
200 | #ifdef USE_WIN32API |
201 | error ("Only <host>:<port> is supported on this platform."); | |
202 | #else | |
8264bb58 DJ |
203 | struct stat statbuf; |
204 | ||
205 | if (stat (name, &statbuf) == 0 | |
206 | && (S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode))) | |
207 | remote_desc = open (name, O_RDWR); | |
208 | else | |
209 | { | |
210 | errno = EINVAL; | |
211 | remote_desc = -1; | |
212 | } | |
213 | ||
c906108c SS |
214 | if (remote_desc < 0) |
215 | perror_with_name ("Could not open remote device"); | |
216 | ||
217 | #ifdef HAVE_TERMIOS | |
218 | { | |
219 | struct termios termios; | |
c5aa993b | 220 | tcgetattr (remote_desc, &termios); |
c906108c SS |
221 | |
222 | termios.c_iflag = 0; | |
223 | termios.c_oflag = 0; | |
224 | termios.c_lflag = 0; | |
c5aa993b | 225 | termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 226 | termios.c_cflag |= CLOCAL | CS8; |
d0608e50 | 227 | termios.c_cc[VMIN] = 1; |
c906108c SS |
228 | termios.c_cc[VTIME] = 0; |
229 | ||
c5aa993b | 230 | tcsetattr (remote_desc, TCSANOW, &termios); |
c906108c SS |
231 | } |
232 | #endif | |
233 | ||
234 | #ifdef HAVE_TERMIO | |
235 | { | |
236 | struct termio termio; | |
237 | ioctl (remote_desc, TCGETA, &termio); | |
238 | ||
239 | termio.c_iflag = 0; | |
240 | termio.c_oflag = 0; | |
241 | termio.c_lflag = 0; | |
c5aa993b | 242 | termio.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 243 | termio.c_cflag |= CLOCAL | CS8; |
d0608e50 | 244 | termio.c_cc[VMIN] = 1; |
c906108c SS |
245 | termio.c_cc[VTIME] = 0; |
246 | ||
247 | ioctl (remote_desc, TCSETA, &termio); | |
248 | } | |
249 | #endif | |
250 | ||
251 | #ifdef HAVE_SGTTY | |
252 | { | |
253 | struct sgttyb sg; | |
254 | ||
255 | ioctl (remote_desc, TIOCGETP, &sg); | |
256 | sg.sg_flags = RAW; | |
257 | ioctl (remote_desc, TIOCSETP, &sg); | |
258 | } | |
259 | #endif | |
260 | ||
e641a1ca | 261 | fprintf (stderr, "Remote debugging using %s\n", name); |
a6f3e723 SL |
262 | |
263 | transport_is_reliable = 0; | |
8336d594 PA |
264 | |
265 | enable_async_notification (remote_desc); | |
266 | ||
267 | /* Register the event loop handler. */ | |
268 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
269 | #endif /* USE_WIN32API */ | |
c906108c SS |
270 | } |
271 | else | |
272 | { | |
b80864fb DJ |
273 | #ifdef USE_WIN32API |
274 | static int winsock_initialized; | |
275 | #endif | |
c906108c SS |
276 | int port; |
277 | struct sockaddr_in sockaddr; | |
f450004a | 278 | socklen_t tmp; |
2d717e4f | 279 | char *port_end; |
c906108c | 280 | |
2d717e4f DJ |
281 | port = strtoul (port_str + 1, &port_end, 10); |
282 | if (port_str[1] == '\0' || *port_end != '\0') | |
283 | fatal ("Bad port argument: %s", name); | |
c906108c | 284 | |
b80864fb DJ |
285 | #ifdef USE_WIN32API |
286 | if (!winsock_initialized) | |
287 | { | |
288 | WSADATA wsad; | |
289 | ||
290 | WSAStartup (MAKEWORD (1, 0), &wsad); | |
291 | winsock_initialized = 1; | |
292 | } | |
293 | #endif | |
294 | ||
8336d594 PA |
295 | listen_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); |
296 | if (listen_desc < 0) | |
c906108c SS |
297 | perror_with_name ("Can't open socket"); |
298 | ||
299 | /* Allow rapid reuse of this port. */ | |
300 | tmp = 1; | |
8336d594 | 301 | setsockopt (listen_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, |
c5aa993b | 302 | sizeof (tmp)); |
c906108c SS |
303 | |
304 | sockaddr.sin_family = PF_INET; | |
c5aa993b | 305 | sockaddr.sin_port = htons (port); |
c906108c SS |
306 | sockaddr.sin_addr.s_addr = INADDR_ANY; |
307 | ||
8336d594 PA |
308 | if (bind (listen_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
309 | || listen (listen_desc, 1)) | |
c906108c SS |
310 | perror_with_name ("Can't bind address"); |
311 | ||
6f8486da DJ |
312 | /* If port is zero, a random port will be selected, and the |
313 | fprintf below needs to know what port was selected. */ | |
314 | if (port == 0) | |
315 | { | |
316 | socklen_t len = sizeof (sockaddr); | |
8336d594 | 317 | if (getsockname (listen_desc, (struct sockaddr *) &sockaddr, &len) < 0 |
6f8486da DJ |
318 | || len < sizeof (sockaddr)) |
319 | perror_with_name ("Can't determine port"); | |
320 | port = ntohs (sockaddr.sin_port); | |
321 | } | |
322 | ||
6910d122 | 323 | fprintf (stderr, "Listening on port %d\n", port); |
b80864fb | 324 | fflush (stderr); |
6910d122 | 325 | |
8336d594 PA |
326 | /* Register the event loop handler. */ |
327 | add_file_handler (listen_desc, handle_accept_event, NULL); | |
a6f3e723 SL |
328 | |
329 | transport_is_reliable = 1; | |
c906108c | 330 | } |
c906108c SS |
331 | } |
332 | ||
333 | void | |
fba45db2 | 334 | remote_close (void) |
c906108c | 335 | { |
bd99dc85 PA |
336 | delete_file_handler (remote_desc); |
337 | ||
b80864fb DJ |
338 | #ifdef USE_WIN32API |
339 | closesocket (remote_desc); | |
340 | #else | |
c906108c | 341 | close (remote_desc); |
b80864fb | 342 | #endif |
8336d594 | 343 | remote_desc = INVALID_DESCRIPTOR; |
c906108c SS |
344 | } |
345 | ||
346 | /* Convert hex digit A to a number. */ | |
347 | ||
348 | static int | |
fba45db2 | 349 | fromhex (int a) |
c906108c SS |
350 | { |
351 | if (a >= '0' && a <= '9') | |
352 | return a - '0'; | |
353 | else if (a >= 'a' && a <= 'f') | |
354 | return a - 'a' + 10; | |
355 | else | |
356 | error ("Reply contains invalid hex digit"); | |
0a30fbc4 | 357 | return 0; |
c906108c SS |
358 | } |
359 | ||
95954743 PA |
360 | static const char hexchars[] = "0123456789abcdef"; |
361 | ||
362 | static int | |
363 | ishex (int ch, int *val) | |
364 | { | |
365 | if ((ch >= 'a') && (ch <= 'f')) | |
366 | { | |
367 | *val = ch - 'a' + 10; | |
368 | return 1; | |
369 | } | |
370 | if ((ch >= 'A') && (ch <= 'F')) | |
371 | { | |
372 | *val = ch - 'A' + 10; | |
373 | return 1; | |
374 | } | |
375 | if ((ch >= '0') && (ch <= '9')) | |
376 | { | |
377 | *val = ch - '0'; | |
378 | return 1; | |
379 | } | |
380 | return 0; | |
381 | } | |
382 | ||
ce3a066d DJ |
383 | int |
384 | unhexify (char *bin, const char *hex, int count) | |
385 | { | |
386 | int i; | |
387 | ||
388 | for (i = 0; i < count; i++) | |
389 | { | |
390 | if (hex[0] == 0 || hex[1] == 0) | |
1b3f6016 PA |
391 | { |
392 | /* Hex string is short, or of uneven length. | |
393 | Return the count that has been converted so far. */ | |
394 | return i; | |
395 | } | |
ce3a066d DJ |
396 | *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); |
397 | hex += 2; | |
398 | } | |
399 | return i; | |
400 | } | |
401 | ||
dae5f5cf | 402 | void |
2f2893d9 DJ |
403 | decode_address (CORE_ADDR *addrp, const char *start, int len) |
404 | { | |
405 | CORE_ADDR addr; | |
406 | char ch; | |
407 | int i; | |
408 | ||
409 | addr = 0; | |
410 | for (i = 0; i < len; i++) | |
411 | { | |
412 | ch = start[i]; | |
413 | addr = addr << 4; | |
414 | addr = addr | (fromhex (ch) & 0x0f); | |
415 | } | |
416 | *addrp = addr; | |
417 | } | |
418 | ||
89be2091 DJ |
419 | const char * |
420 | decode_address_to_semicolon (CORE_ADDR *addrp, const char *start) | |
421 | { | |
422 | const char *end; | |
423 | ||
424 | end = start; | |
425 | while (*end != '\0' && *end != ';') | |
426 | end++; | |
427 | ||
428 | decode_address (addrp, start, end - start); | |
429 | ||
430 | if (*end == ';') | |
431 | end++; | |
432 | return end; | |
433 | } | |
434 | ||
c906108c SS |
435 | /* Convert number NIB to a hex digit. */ |
436 | ||
437 | static int | |
fba45db2 | 438 | tohex (int nib) |
c906108c SS |
439 | { |
440 | if (nib < 10) | |
441 | return '0' + nib; | |
442 | else | |
443 | return 'a' + nib - 10; | |
444 | } | |
445 | ||
ce3a066d DJ |
446 | int |
447 | hexify (char *hex, const char *bin, int count) | |
448 | { | |
449 | int i; | |
450 | ||
451 | /* May use a length, or a nul-terminated string as input. */ | |
452 | if (count == 0) | |
453 | count = strlen (bin); | |
454 | ||
455 | for (i = 0; i < count; i++) | |
456 | { | |
457 | *hex++ = tohex ((*bin >> 4) & 0xf); | |
458 | *hex++ = tohex (*bin++ & 0xf); | |
459 | } | |
460 | *hex = 0; | |
461 | return i; | |
462 | } | |
463 | ||
01f9e8fa DJ |
464 | /* Convert BUFFER, binary data at least LEN bytes long, into escaped |
465 | binary data in OUT_BUF. Set *OUT_LEN to the length of the data | |
466 | encoded in OUT_BUF, and return the number of bytes in OUT_BUF | |
467 | (which may be more than *OUT_LEN due to escape characters). The | |
468 | total number of bytes in the output buffer will be at most | |
469 | OUT_MAXLEN. */ | |
470 | ||
471 | int | |
472 | remote_escape_output (const gdb_byte *buffer, int len, | |
473 | gdb_byte *out_buf, int *out_len, | |
474 | int out_maxlen) | |
475 | { | |
476 | int input_index, output_index; | |
477 | ||
478 | output_index = 0; | |
479 | for (input_index = 0; input_index < len; input_index++) | |
480 | { | |
481 | gdb_byte b = buffer[input_index]; | |
482 | ||
483 | if (b == '$' || b == '#' || b == '}' || b == '*') | |
484 | { | |
485 | /* These must be escaped. */ | |
486 | if (output_index + 2 > out_maxlen) | |
487 | break; | |
488 | out_buf[output_index++] = '}'; | |
489 | out_buf[output_index++] = b ^ 0x20; | |
490 | } | |
491 | else | |
492 | { | |
493 | if (output_index + 1 > out_maxlen) | |
494 | break; | |
495 | out_buf[output_index++] = b; | |
496 | } | |
497 | } | |
498 | ||
499 | *out_len = input_index; | |
500 | return output_index; | |
501 | } | |
502 | ||
503 | /* Convert BUFFER, escaped data LEN bytes long, into binary data | |
504 | in OUT_BUF. Return the number of bytes written to OUT_BUF. | |
505 | Raise an error if the total number of bytes exceeds OUT_MAXLEN. | |
506 | ||
507 | This function reverses remote_escape_output. It allows more | |
508 | escaped characters than that function does, in particular because | |
509 | '*' must be escaped to avoid the run-length encoding processing | |
510 | in reading packets. */ | |
511 | ||
512 | static int | |
513 | remote_unescape_input (const gdb_byte *buffer, int len, | |
514 | gdb_byte *out_buf, int out_maxlen) | |
515 | { | |
516 | int input_index, output_index; | |
517 | int escaped; | |
518 | ||
519 | output_index = 0; | |
520 | escaped = 0; | |
521 | for (input_index = 0; input_index < len; input_index++) | |
522 | { | |
523 | gdb_byte b = buffer[input_index]; | |
524 | ||
525 | if (output_index + 1 > out_maxlen) | |
526 | error ("Received too much data from the target."); | |
527 | ||
528 | if (escaped) | |
529 | { | |
530 | out_buf[output_index++] = b ^ 0x20; | |
531 | escaped = 0; | |
532 | } | |
533 | else if (b == '}') | |
534 | escaped = 1; | |
535 | else | |
536 | out_buf[output_index++] = b; | |
537 | } | |
538 | ||
539 | if (escaped) | |
540 | error ("Unmatched escape character in target response."); | |
541 | ||
542 | return output_index; | |
543 | } | |
544 | ||
5ffff7c1 DJ |
545 | /* Look for a sequence of characters which can be run-length encoded. |
546 | If there are any, update *CSUM and *P. Otherwise, output the | |
547 | single character. Return the number of characters consumed. */ | |
548 | ||
549 | static int | |
550 | try_rle (char *buf, int remaining, unsigned char *csum, char **p) | |
551 | { | |
552 | int n; | |
553 | ||
554 | /* Always output the character. */ | |
555 | *csum += buf[0]; | |
556 | *(*p)++ = buf[0]; | |
557 | ||
558 | /* Don't go past '~'. */ | |
559 | if (remaining > 97) | |
560 | remaining = 97; | |
561 | ||
562 | for (n = 1; n < remaining; n++) | |
563 | if (buf[n] != buf[0]) | |
564 | break; | |
565 | ||
566 | /* N is the index of the first character not the same as buf[0]. | |
567 | buf[0] is counted twice, so by decrementing N, we get the number | |
568 | of characters the RLE sequence will replace. */ | |
569 | n--; | |
570 | ||
571 | if (n < 3) | |
572 | return 1; | |
573 | ||
574 | /* Skip the frame characters. The manual says to skip '+' and '-' | |
575 | also, but there's no reason to. Unfortunately these two unusable | |
576 | characters double the encoded length of a four byte zero | |
577 | value. */ | |
578 | while (n + 29 == '$' || n + 29 == '#') | |
579 | n--; | |
580 | ||
581 | *csum += '*'; | |
582 | *(*p)++ = '*'; | |
583 | *csum += n + 29; | |
584 | *(*p)++ = n + 29; | |
585 | ||
586 | return n + 1; | |
587 | } | |
588 | ||
95954743 PA |
589 | char * |
590 | unpack_varlen_hex (char *buff, /* packet to parse */ | |
591 | ULONGEST *result) | |
592 | { | |
593 | int nibble; | |
594 | ULONGEST retval = 0; | |
595 | ||
596 | while (ishex (*buff, &nibble)) | |
597 | { | |
598 | buff++; | |
599 | retval = retval << 4; | |
600 | retval |= nibble & 0x0f; | |
601 | } | |
602 | *result = retval; | |
603 | return buff; | |
604 | } | |
605 | ||
606 | /* Write a PTID to BUF. Returns BUF+CHARACTERS_WRITTEN. */ | |
607 | ||
608 | char * | |
609 | write_ptid (char *buf, ptid_t ptid) | |
610 | { | |
611 | int pid, tid; | |
612 | ||
613 | if (multi_process) | |
614 | { | |
615 | pid = ptid_get_pid (ptid); | |
616 | if (pid < 0) | |
617 | buf += sprintf (buf, "p-%x.", -pid); | |
618 | else | |
619 | buf += sprintf (buf, "p%x.", pid); | |
620 | } | |
621 | tid = ptid_get_lwp (ptid); | |
622 | if (tid < 0) | |
623 | buf += sprintf (buf, "-%x", -tid); | |
624 | else | |
625 | buf += sprintf (buf, "%x", tid); | |
626 | ||
627 | return buf; | |
628 | } | |
629 | ||
630 | ULONGEST | |
631 | hex_or_minus_one (char *buf, char **obuf) | |
632 | { | |
633 | ULONGEST ret; | |
634 | ||
635 | if (strncmp (buf, "-1", 2) == 0) | |
636 | { | |
637 | ret = (ULONGEST) -1; | |
638 | buf += 2; | |
639 | } | |
640 | else | |
641 | buf = unpack_varlen_hex (buf, &ret); | |
642 | ||
643 | if (obuf) | |
644 | *obuf = buf; | |
645 | ||
646 | return ret; | |
647 | } | |
648 | ||
649 | /* Extract a PTID from BUF. If non-null, OBUF is set to the to one | |
650 | passed the last parsed char. Returns null_ptid on error. */ | |
651 | ptid_t | |
652 | read_ptid (char *buf, char **obuf) | |
653 | { | |
654 | char *p = buf; | |
655 | char *pp; | |
656 | ULONGEST pid = 0, tid = 0; | |
657 | ||
658 | if (*p == 'p') | |
659 | { | |
660 | /* Multi-process ptid. */ | |
661 | pp = unpack_varlen_hex (p + 1, &pid); | |
662 | if (*pp != '.') | |
663 | error ("invalid remote ptid: %s\n", p); | |
664 | ||
665 | p = pp + 1; | |
666 | ||
667 | tid = hex_or_minus_one (p, &pp); | |
668 | ||
669 | if (obuf) | |
670 | *obuf = pp; | |
671 | return ptid_build (pid, tid, 0); | |
672 | } | |
673 | ||
674 | /* No multi-process. Just a tid. */ | |
675 | tid = hex_or_minus_one (p, &pp); | |
676 | ||
677 | /* Since the stub is not sending a process id, then default to | |
678 | what's in the current inferior. */ | |
679 | pid = ptid_get_pid (((struct inferior_list_entry *) current_inferior)->id); | |
680 | ||
681 | if (obuf) | |
682 | *obuf = pp; | |
683 | return ptid_build (pid, tid, 0); | |
684 | } | |
685 | ||
c906108c | 686 | /* Send a packet to the remote machine, with error checking. |
01f9e8fa DJ |
687 | The data of the packet is in BUF, and the length of the |
688 | packet is in CNT. Returns >= 0 on success, -1 otherwise. */ | |
c906108c | 689 | |
bd99dc85 PA |
690 | static int |
691 | putpkt_binary_1 (char *buf, int cnt, int is_notif) | |
c906108c SS |
692 | { |
693 | int i; | |
694 | unsigned char csum = 0; | |
0a30fbc4 | 695 | char *buf2; |
c906108c | 696 | char *p; |
bc3b5632 | 697 | int cc; |
c906108c | 698 | |
bca929d3 | 699 | buf2 = xmalloc (PBUFSIZ); |
0a30fbc4 | 700 | |
c906108c SS |
701 | /* Copy the packet into buffer BUF2, encapsulating it |
702 | and giving it a checksum. */ | |
703 | ||
704 | p = buf2; | |
bd99dc85 PA |
705 | if (is_notif) |
706 | *p++ = '%'; | |
707 | else | |
708 | *p++ = '$'; | |
c906108c | 709 | |
5ffff7c1 DJ |
710 | for (i = 0; i < cnt;) |
711 | i += try_rle (buf + i, cnt - i, &csum, &p); | |
712 | ||
c906108c SS |
713 | *p++ = '#'; |
714 | *p++ = tohex ((csum >> 4) & 0xf); | |
715 | *p++ = tohex (csum & 0xf); | |
716 | ||
717 | *p = '\0'; | |
718 | ||
719 | /* Send it over and over until we get a positive ack. */ | |
720 | ||
721 | do | |
722 | { | |
0f48aa01 | 723 | if (write (remote_desc, buf2, p - buf2) != p - buf2) |
c906108c SS |
724 | { |
725 | perror ("putpkt(write)"); | |
f88c79e6 | 726 | free (buf2); |
c906108c SS |
727 | return -1; |
728 | } | |
729 | ||
bd99dc85 | 730 | if (noack_mode || is_notif) |
a6f3e723 SL |
731 | { |
732 | /* Don't expect an ack then. */ | |
733 | if (remote_debug) | |
734 | { | |
bd99dc85 PA |
735 | if (is_notif) |
736 | fprintf (stderr, "putpkt (\"%s\"); [notif]\n", buf2); | |
737 | else | |
738 | fprintf (stderr, "putpkt (\"%s\"); [noack mode]\n", buf2); | |
a6f3e723 SL |
739 | fflush (stderr); |
740 | } | |
741 | break; | |
742 | } | |
743 | ||
c906108c | 744 | if (remote_debug) |
0d62e5e8 DJ |
745 | { |
746 | fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2); | |
747 | fflush (stderr); | |
748 | } | |
0d62e5e8 | 749 | |
bc3b5632 | 750 | cc = readchar (); |
c906108c | 751 | |
bc3b5632 DE |
752 | if (cc < 0) |
753 | { | |
0a30fbc4 | 754 | free (buf2); |
c906108c SS |
755 | return -1; |
756 | } | |
0d62e5e8 | 757 | |
bc3b5632 DE |
758 | if (remote_debug) |
759 | { | |
760 | fprintf (stderr, "[received '%c' (0x%x)]\n", cc, cc); | |
761 | fflush (stderr); | |
762 | } | |
763 | ||
0d62e5e8 | 764 | /* Check for an input interrupt while we're here. */ |
bc3b5632 | 765 | if (cc == '\003' && current_inferior != NULL) |
ef57601b | 766 | (*the_target->request_interrupt) (); |
c906108c | 767 | } |
bc3b5632 | 768 | while (cc != '+'); |
c906108c | 769 | |
0a30fbc4 | 770 | free (buf2); |
c906108c SS |
771 | return 1; /* Success! */ |
772 | } | |
773 | ||
bd99dc85 PA |
774 | int |
775 | putpkt_binary (char *buf, int cnt) | |
776 | { | |
777 | return putpkt_binary_1 (buf, cnt, 0); | |
778 | } | |
779 | ||
01f9e8fa DJ |
780 | /* Send a packet to the remote machine, with error checking. The data |
781 | of the packet is in BUF, and the packet should be a NUL-terminated | |
782 | string. Returns >= 0 on success, -1 otherwise. */ | |
783 | ||
784 | int | |
785 | putpkt (char *buf) | |
786 | { | |
787 | return putpkt_binary (buf, strlen (buf)); | |
788 | } | |
789 | ||
bd99dc85 PA |
790 | int |
791 | putpkt_notif (char *buf) | |
792 | { | |
793 | return putpkt_binary_1 (buf, strlen (buf), 1); | |
794 | } | |
795 | ||
c906108c SS |
796 | /* Come here when we get an input interrupt from the remote side. This |
797 | interrupt should only be active while we are waiting for the child to do | |
bc3b5632 DE |
798 | something. Thus this assumes readchar:bufcnt is 0. |
799 | About the only thing that should come through is a ^C, which | |
ef57601b | 800 | will cause us to request child interruption. */ |
c906108c SS |
801 | |
802 | static void | |
0a30fbc4 | 803 | input_interrupt (int unused) |
c906108c | 804 | { |
cf30a8e1 C |
805 | fd_set readset; |
806 | struct timeval immediate = { 0, 0 }; | |
c906108c | 807 | |
cf30a8e1 C |
808 | /* Protect against spurious interrupts. This has been observed to |
809 | be a problem under NetBSD 1.4 and 1.5. */ | |
c906108c | 810 | |
cf30a8e1 C |
811 | FD_ZERO (&readset); |
812 | FD_SET (remote_desc, &readset); | |
813 | if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) | |
c906108c | 814 | { |
cf30a8e1 | 815 | int cc; |
fd500816 | 816 | char c = 0; |
7390519e | 817 | |
0f48aa01 | 818 | cc = read (remote_desc, &c, 1); |
c906108c | 819 | |
2d717e4f | 820 | if (cc != 1 || c != '\003' || current_inferior == NULL) |
cf30a8e1 | 821 | { |
fd500816 DJ |
822 | fprintf (stderr, "input_interrupt, count = %d c = %d ('%c')\n", |
823 | cc, c, c); | |
cf30a8e1 C |
824 | return; |
825 | } | |
7390519e | 826 | |
ef57601b | 827 | (*the_target->request_interrupt) (); |
cf30a8e1 | 828 | } |
c906108c | 829 | } |
7390519e PA |
830 | |
831 | /* Check if the remote side sent us an interrupt request (^C). */ | |
832 | void | |
833 | check_remote_input_interrupt_request (void) | |
834 | { | |
835 | /* This function may be called before establishing communications, | |
836 | therefore we need to validate the remote descriptor. */ | |
837 | ||
838 | if (remote_desc == INVALID_DESCRIPTOR) | |
839 | return; | |
840 | ||
841 | input_interrupt (0); | |
842 | } | |
b80864fb DJ |
843 | |
844 | /* Asynchronous I/O support. SIGIO must be enabled when waiting, in order to | |
845 | accept Control-C from the client, and must be disabled when talking to | |
846 | the client. */ | |
c906108c | 847 | |
a20d5e98 | 848 | static void |
62ea82f5 DJ |
849 | unblock_async_io (void) |
850 | { | |
b80864fb | 851 | #ifndef USE_WIN32API |
62ea82f5 | 852 | sigset_t sigio_set; |
a20d5e98 | 853 | |
62ea82f5 DJ |
854 | sigemptyset (&sigio_set); |
855 | sigaddset (&sigio_set, SIGIO); | |
856 | sigprocmask (SIG_UNBLOCK, &sigio_set, NULL); | |
b80864fb | 857 | #endif |
62ea82f5 DJ |
858 | } |
859 | ||
ac8c974e AR |
860 | #ifdef __QNX__ |
861 | static void | |
862 | nto_comctrl (int enable) | |
863 | { | |
864 | struct sigevent event; | |
865 | ||
866 | if (enable) | |
867 | { | |
868 | event.sigev_notify = SIGEV_SIGNAL_THREAD; | |
869 | event.sigev_signo = SIGIO; | |
870 | event.sigev_code = 0; | |
871 | event.sigev_value.sival_ptr = NULL; | |
872 | event.sigev_priority = -1; | |
873 | ionotify (remote_desc, _NOTIFY_ACTION_POLLARM, _NOTIFY_COND_INPUT, | |
874 | &event); | |
875 | } | |
876 | else | |
877 | ionotify (remote_desc, _NOTIFY_ACTION_POLL, _NOTIFY_COND_INPUT, NULL); | |
878 | } | |
879 | #endif /* __QNX__ */ | |
880 | ||
881 | ||
fd500816 DJ |
882 | /* Current state of asynchronous I/O. */ |
883 | static int async_io_enabled; | |
884 | ||
885 | /* Enable asynchronous I/O. */ | |
c906108c | 886 | void |
fba45db2 | 887 | enable_async_io (void) |
c906108c | 888 | { |
fd500816 DJ |
889 | if (async_io_enabled) |
890 | return; | |
891 | ||
b80864fb | 892 | #ifndef USE_WIN32API |
c906108c | 893 | signal (SIGIO, input_interrupt); |
b80864fb | 894 | #endif |
fd500816 | 895 | async_io_enabled = 1; |
ac8c974e AR |
896 | #ifdef __QNX__ |
897 | nto_comctrl (1); | |
898 | #endif /* __QNX__ */ | |
c906108c SS |
899 | } |
900 | ||
fd500816 | 901 | /* Disable asynchronous I/O. */ |
c906108c | 902 | void |
fba45db2 | 903 | disable_async_io (void) |
c906108c | 904 | { |
fd500816 DJ |
905 | if (!async_io_enabled) |
906 | return; | |
907 | ||
b80864fb | 908 | #ifndef USE_WIN32API |
c906108c | 909 | signal (SIGIO, SIG_IGN); |
b80864fb | 910 | #endif |
fd500816 | 911 | async_io_enabled = 0; |
ac8c974e AR |
912 | #ifdef __QNX__ |
913 | nto_comctrl (0); | |
914 | #endif /* __QNX__ */ | |
915 | ||
c906108c SS |
916 | } |
917 | ||
a20d5e98 DJ |
918 | void |
919 | initialize_async_io (void) | |
920 | { | |
921 | /* Make sure that async I/O starts disabled. */ | |
922 | async_io_enabled = 1; | |
923 | disable_async_io (); | |
924 | ||
925 | /* Make sure the signal is unblocked. */ | |
926 | unblock_async_io (); | |
927 | } | |
928 | ||
c906108c SS |
929 | /* Returns next char from remote GDB. -1 if error. */ |
930 | ||
931 | static int | |
fba45db2 | 932 | readchar (void) |
c906108c | 933 | { |
01f9e8fa | 934 | static unsigned char buf[BUFSIZ]; |
c906108c | 935 | static int bufcnt = 0; |
01f9e8fa | 936 | static unsigned char *bufp; |
c906108c SS |
937 | |
938 | if (bufcnt-- > 0) | |
01f9e8fa | 939 | return *bufp++; |
c906108c | 940 | |
0f48aa01 | 941 | bufcnt = read (remote_desc, buf, sizeof (buf)); |
c906108c SS |
942 | |
943 | if (bufcnt <= 0) | |
944 | { | |
945 | if (bufcnt == 0) | |
946 | fprintf (stderr, "readchar: Got EOF\n"); | |
947 | else | |
948 | perror ("readchar"); | |
949 | ||
950 | return -1; | |
951 | } | |
952 | ||
953 | bufp = buf; | |
954 | bufcnt--; | |
b79d787e | 955 | return *bufp++; |
c906108c SS |
956 | } |
957 | ||
958 | /* Read a packet from the remote machine, with error checking, | |
959 | and store it in BUF. Returns length of packet, or negative if error. */ | |
960 | ||
961 | int | |
fba45db2 | 962 | getpkt (char *buf) |
c906108c SS |
963 | { |
964 | char *bp; | |
965 | unsigned char csum, c1, c2; | |
966 | int c; | |
967 | ||
968 | while (1) | |
969 | { | |
970 | csum = 0; | |
971 | ||
972 | while (1) | |
973 | { | |
974 | c = readchar (); | |
975 | if (c == '$') | |
976 | break; | |
977 | if (remote_debug) | |
0d62e5e8 DJ |
978 | { |
979 | fprintf (stderr, "[getpkt: discarding char '%c']\n", c); | |
980 | fflush (stderr); | |
981 | } | |
982 | ||
c906108c SS |
983 | if (c < 0) |
984 | return -1; | |
985 | } | |
986 | ||
987 | bp = buf; | |
988 | while (1) | |
989 | { | |
990 | c = readchar (); | |
991 | if (c < 0) | |
992 | return -1; | |
993 | if (c == '#') | |
994 | break; | |
995 | *bp++ = c; | |
996 | csum += c; | |
997 | } | |
998 | *bp = 0; | |
999 | ||
1000 | c1 = fromhex (readchar ()); | |
1001 | c2 = fromhex (readchar ()); | |
c5aa993b | 1002 | |
c906108c SS |
1003 | if (csum == (c1 << 4) + c2) |
1004 | break; | |
1005 | ||
a6f3e723 SL |
1006 | if (noack_mode) |
1007 | { | |
1008 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s [no-ack-mode, Bad medium?]\n", | |
1009 | (c1 << 4) + c2, csum, buf); | |
1010 | /* Not much we can do, GDB wasn't expecting an ack/nac. */ | |
1011 | break; | |
1012 | } | |
1013 | ||
c906108c SS |
1014 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", |
1015 | (c1 << 4) + c2, csum, buf); | |
0f48aa01 | 1016 | write (remote_desc, "-", 1); |
c906108c SS |
1017 | } |
1018 | ||
a6f3e723 | 1019 | if (!noack_mode) |
0d62e5e8 | 1020 | { |
a6f3e723 SL |
1021 | if (remote_debug) |
1022 | { | |
1023 | fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf); | |
1024 | fflush (stderr); | |
1025 | } | |
c906108c | 1026 | |
a6f3e723 | 1027 | write (remote_desc, "+", 1); |
c906108c | 1028 | |
a6f3e723 SL |
1029 | if (remote_debug) |
1030 | { | |
1031 | fprintf (stderr, "[sent ack]\n"); | |
1032 | fflush (stderr); | |
1033 | } | |
0d62e5e8 | 1034 | } |
86b1f9c5 PM |
1035 | else |
1036 | { | |
1037 | if (remote_debug) | |
1038 | { | |
1039 | fprintf (stderr, "getpkt (\"%s\"); [no ack sent] \n", buf); | |
1040 | fflush (stderr); | |
1041 | } | |
1042 | } | |
0d62e5e8 | 1043 | |
c906108c SS |
1044 | return bp - buf; |
1045 | } | |
1046 | ||
1047 | void | |
fba45db2 | 1048 | write_ok (char *buf) |
c906108c SS |
1049 | { |
1050 | buf[0] = 'O'; | |
1051 | buf[1] = 'K'; | |
1052 | buf[2] = '\0'; | |
1053 | } | |
1054 | ||
1055 | void | |
fba45db2 | 1056 | write_enn (char *buf) |
c906108c | 1057 | { |
c89dc5d4 | 1058 | /* Some day, we should define the meanings of the error codes... */ |
c906108c | 1059 | buf[0] = 'E'; |
c89dc5d4 DJ |
1060 | buf[1] = '0'; |
1061 | buf[2] = '1'; | |
c906108c SS |
1062 | buf[3] = '\0'; |
1063 | } | |
1064 | ||
1065 | void | |
f450004a | 1066 | convert_int_to_ascii (unsigned char *from, char *to, int n) |
c906108c SS |
1067 | { |
1068 | int nib; | |
f450004a | 1069 | int ch; |
c906108c SS |
1070 | while (n--) |
1071 | { | |
1072 | ch = *from++; | |
1073 | nib = ((ch & 0xf0) >> 4) & 0x0f; | |
1074 | *to++ = tohex (nib); | |
1075 | nib = ch & 0x0f; | |
1076 | *to++ = tohex (nib); | |
1077 | } | |
1078 | *to++ = 0; | |
1079 | } | |
1080 | ||
1081 | ||
1082 | void | |
f450004a | 1083 | convert_ascii_to_int (char *from, unsigned char *to, int n) |
c906108c SS |
1084 | { |
1085 | int nib1, nib2; | |
1086 | while (n--) | |
1087 | { | |
1088 | nib1 = fromhex (*from++); | |
1089 | nib2 = fromhex (*from++); | |
1090 | *to++ = (((nib1 & 0x0f) << 4) & 0xf0) | (nib2 & 0x0f); | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | static char * | |
442ea881 | 1095 | outreg (struct regcache *regcache, int regno, char *buf) |
c906108c | 1096 | { |
5c44784c JM |
1097 | if ((regno >> 12) != 0) |
1098 | *buf++ = tohex ((regno >> 12) & 0xf); | |
1099 | if ((regno >> 8) != 0) | |
1100 | *buf++ = tohex ((regno >> 8) & 0xf); | |
1101 | *buf++ = tohex ((regno >> 4) & 0xf); | |
c906108c SS |
1102 | *buf++ = tohex (regno & 0xf); |
1103 | *buf++ = ':'; | |
442ea881 | 1104 | collect_register_as_string (regcache, regno, buf); |
0d62e5e8 | 1105 | buf += 2 * register_size (regno); |
c906108c SS |
1106 | *buf++ = ';'; |
1107 | ||
1108 | return buf; | |
1109 | } | |
1110 | ||
0d62e5e8 DJ |
1111 | void |
1112 | new_thread_notify (int id) | |
1113 | { | |
1114 | char own_buf[256]; | |
1115 | ||
1116 | /* The `n' response is not yet part of the remote protocol. Do nothing. */ | |
1117 | if (1) | |
1118 | return; | |
1119 | ||
1120 | if (server_waiting == 0) | |
1121 | return; | |
1122 | ||
1123 | sprintf (own_buf, "n%x", id); | |
1124 | disable_async_io (); | |
1125 | putpkt (own_buf); | |
1126 | enable_async_io (); | |
1127 | } | |
1128 | ||
1129 | void | |
1130 | dead_thread_notify (int id) | |
1131 | { | |
1132 | char own_buf[256]; | |
1133 | ||
1134 | /* The `x' response is not yet part of the remote protocol. Do nothing. */ | |
1135 | if (1) | |
1136 | return; | |
1137 | ||
1138 | sprintf (own_buf, "x%x", id); | |
1139 | disable_async_io (); | |
1140 | putpkt (own_buf); | |
1141 | enable_async_io (); | |
1142 | } | |
1143 | ||
c906108c | 1144 | void |
95954743 | 1145 | prepare_resume_reply (char *buf, ptid_t ptid, |
5b1c542e | 1146 | struct target_waitstatus *status) |
c906108c | 1147 | { |
5b1c542e | 1148 | if (debug_threads) |
95954743 PA |
1149 | fprintf (stderr, "Writing resume reply for %s:%d\n\n", |
1150 | target_pid_to_str (ptid), status->kind); | |
c906108c | 1151 | |
5b1c542e | 1152 | switch (status->kind) |
c906108c | 1153 | { |
5b1c542e PA |
1154 | case TARGET_WAITKIND_STOPPED: |
1155 | { | |
1156 | struct thread_info *saved_inferior; | |
1157 | const char **regp; | |
442ea881 | 1158 | struct regcache *regcache; |
e013ee27 | 1159 | |
5b1c542e PA |
1160 | sprintf (buf, "T%02x", status->value.sig); |
1161 | buf += strlen (buf); | |
e013ee27 | 1162 | |
5b1c542e | 1163 | regp = gdbserver_expedite_regs; |
e013ee27 | 1164 | |
5b1c542e | 1165 | saved_inferior = current_inferior; |
e013ee27 | 1166 | |
e09875d4 | 1167 | current_inferior = find_thread_ptid (ptid); |
e013ee27 | 1168 | |
442ea881 PA |
1169 | regcache = get_thread_regcache (current_inferior, 1); |
1170 | ||
5b1c542e PA |
1171 | if (the_target->stopped_by_watchpoint != NULL |
1172 | && (*the_target->stopped_by_watchpoint) ()) | |
1173 | { | |
1174 | CORE_ADDR addr; | |
1175 | int i; | |
c906108c | 1176 | |
5b1c542e PA |
1177 | strncpy (buf, "watch:", 6); |
1178 | buf += 6; | |
0d62e5e8 | 1179 | |
5b1c542e | 1180 | addr = (*the_target->stopped_data_address) (); |
255e7678 | 1181 | |
5b1c542e PA |
1182 | /* Convert each byte of the address into two hexadecimal |
1183 | chars. Note that we take sizeof (void *) instead of | |
1184 | sizeof (addr); this is to avoid sending a 64-bit | |
1185 | address to a 32-bit GDB. */ | |
1186 | for (i = sizeof (void *) * 2; i > 0; i--) | |
1187 | *buf++ = tohex ((addr >> (i - 1) * 4) & 0xf); | |
1188 | *buf++ = ';'; | |
1189 | } | |
1190 | ||
1191 | while (*regp) | |
1192 | { | |
442ea881 | 1193 | buf = outreg (regcache, find_regno (*regp), buf); |
5b1c542e PA |
1194 | regp ++; |
1195 | } | |
5472f405 | 1196 | *buf = '\0'; |
5b1c542e PA |
1197 | |
1198 | /* Formerly, if the debugger had not used any thread features | |
1199 | we would not burden it with a thread status response. This | |
1200 | was for the benefit of GDB 4.13 and older. However, in | |
1201 | recent GDB versions the check (``if (cont_thread != 0)'') | |
1202 | does not have the desired effect because of sillyness in | |
1203 | the way that the remote protocol handles specifying a | |
1204 | thread. Since thread support relies on qSymbol support | |
1205 | anyway, assume GDB can handle threads. */ | |
1206 | ||
1207 | if (using_threads && !disable_packet_Tthread) | |
1208 | { | |
1209 | /* This if (1) ought to be unnecessary. But remote_wait | |
1210 | in GDB will claim this event belongs to inferior_ptid | |
1211 | if we do not specify a thread, and there's no way for | |
1212 | gdbserver to know what inferior_ptid is. */ | |
95954743 | 1213 | if (1 || !ptid_equal (general_thread, ptid)) |
5b1c542e | 1214 | { |
dc146f7c | 1215 | int core = -1; |
bd99dc85 PA |
1216 | /* In non-stop, don't change the general thread behind |
1217 | GDB's back. */ | |
1218 | if (!non_stop) | |
1219 | general_thread = ptid; | |
95954743 PA |
1220 | sprintf (buf, "thread:"); |
1221 | buf += strlen (buf); | |
1222 | buf = write_ptid (buf, ptid); | |
1223 | strcat (buf, ";"); | |
5b1c542e | 1224 | buf += strlen (buf); |
dc146f7c VP |
1225 | |
1226 | if (the_target->core_of_thread) | |
1227 | core = (*the_target->core_of_thread) (ptid); | |
1228 | if (core != -1) | |
1229 | { | |
1230 | sprintf (buf, "core:"); | |
1231 | buf += strlen (buf); | |
1232 | sprintf (buf, "%x", core); | |
1233 | strcat (buf, ";"); | |
1234 | buf += strlen (buf); | |
1235 | } | |
5b1c542e PA |
1236 | } |
1237 | } | |
1238 | ||
1239 | if (dlls_changed) | |
1240 | { | |
1241 | strcpy (buf, "library:;"); | |
1242 | buf += strlen (buf); | |
1243 | dlls_changed = 0; | |
1244 | } | |
1245 | ||
1246 | current_inferior = saved_inferior; | |
1247 | } | |
1248 | break; | |
1249 | case TARGET_WAITKIND_EXITED: | |
95954743 PA |
1250 | if (multi_process) |
1251 | sprintf (buf, "W%x;process:%x", | |
1252 | status->value.integer, ptid_get_pid (ptid)); | |
1253 | else | |
1254 | sprintf (buf, "W%02x", status->value.integer); | |
5b1c542e PA |
1255 | break; |
1256 | case TARGET_WAITKIND_SIGNALLED: | |
95954743 PA |
1257 | if (multi_process) |
1258 | sprintf (buf, "X%x;process:%x", | |
1259 | status->value.sig, ptid_get_pid (ptid)); | |
1260 | else | |
1261 | sprintf (buf, "X%02x", status->value.sig); | |
5b1c542e PA |
1262 | break; |
1263 | default: | |
1264 | error ("unhandled waitkind"); | |
1265 | break; | |
c906108c | 1266 | } |
c906108c SS |
1267 | } |
1268 | ||
1269 | void | |
fba45db2 | 1270 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
c906108c SS |
1271 | { |
1272 | int i = 0, j = 0; | |
1273 | char ch; | |
1274 | *mem_addr_ptr = *len_ptr = 0; | |
1275 | ||
1276 | while ((ch = from[i++]) != ',') | |
1277 | { | |
1278 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1279 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1280 | } | |
1281 | ||
1282 | for (j = 0; j < 4; j++) | |
1283 | { | |
1284 | if ((ch = from[i++]) == 0) | |
1285 | break; | |
1286 | *len_ptr = *len_ptr << 4; | |
1287 | *len_ptr |= fromhex (ch) & 0x0f; | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | void | |
fba45db2 | 1292 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
f450004a | 1293 | unsigned char *to) |
c906108c SS |
1294 | { |
1295 | int i = 0; | |
1296 | char ch; | |
1297 | *mem_addr_ptr = *len_ptr = 0; | |
1298 | ||
1299 | while ((ch = from[i++]) != ',') | |
1300 | { | |
1301 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1302 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1303 | } | |
1304 | ||
1305 | while ((ch = from[i++]) != ':') | |
1306 | { | |
1307 | *len_ptr = *len_ptr << 4; | |
1308 | *len_ptr |= fromhex (ch) & 0x0f; | |
1309 | } | |
1310 | ||
1311 | convert_ascii_to_int (&from[i++], to, *len_ptr); | |
1312 | } | |
2f2893d9 | 1313 | |
01f9e8fa DJ |
1314 | int |
1315 | decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr, | |
1316 | unsigned int *len_ptr, unsigned char *to) | |
1317 | { | |
1318 | int i = 0; | |
1319 | char ch; | |
1320 | *mem_addr_ptr = *len_ptr = 0; | |
1321 | ||
1322 | while ((ch = from[i++]) != ',') | |
1323 | { | |
1324 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1325 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1326 | } | |
1327 | ||
1328 | while ((ch = from[i++]) != ':') | |
1329 | { | |
1330 | *len_ptr = *len_ptr << 4; | |
1331 | *len_ptr |= fromhex (ch) & 0x0f; | |
1332 | } | |
1333 | ||
1334 | if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i, | |
1335 | to, *len_ptr) != *len_ptr) | |
1336 | return -1; | |
1337 | ||
1338 | return 0; | |
1339 | } | |
1340 | ||
0e7f50da UW |
1341 | /* Decode a qXfer write request. */ |
1342 | int | |
1343 | decode_xfer_write (char *buf, int packet_len, char **annex, CORE_ADDR *offset, | |
1344 | unsigned int *len, unsigned char *data) | |
1345 | { | |
1346 | char ch; | |
1347 | ||
1348 | /* Extract and NUL-terminate the annex. */ | |
1349 | *annex = buf; | |
1350 | while (*buf && *buf != ':') | |
1351 | buf++; | |
1352 | if (*buf == '\0') | |
1353 | return -1; | |
1354 | *buf++ = 0; | |
1355 | ||
1356 | /* Extract the offset. */ | |
1357 | *offset = 0; | |
1358 | while ((ch = *buf++) != ':') | |
1359 | { | |
1360 | *offset = *offset << 4; | |
1361 | *offset |= fromhex (ch) & 0x0f; | |
1362 | } | |
1363 | ||
1364 | /* Get encoded data. */ | |
1365 | packet_len -= buf - *annex; | |
1366 | *len = remote_unescape_input ((const gdb_byte *) buf, packet_len, | |
1367 | data, packet_len); | |
1368 | return 0; | |
1369 | } | |
1370 | ||
08388c79 DE |
1371 | /* Decode the parameters of a qSearch:memory packet. */ |
1372 | ||
1373 | int | |
1374 | decode_search_memory_packet (const char *buf, int packet_len, | |
1375 | CORE_ADDR *start_addrp, | |
1376 | CORE_ADDR *search_space_lenp, | |
1377 | gdb_byte *pattern, unsigned int *pattern_lenp) | |
1378 | { | |
1379 | const char *p = buf; | |
1380 | ||
1381 | p = decode_address_to_semicolon (start_addrp, p); | |
1382 | p = decode_address_to_semicolon (search_space_lenp, p); | |
1383 | packet_len -= p - buf; | |
1384 | *pattern_lenp = remote_unescape_input ((const gdb_byte *) p, packet_len, | |
1385 | pattern, packet_len); | |
1386 | return 0; | |
1387 | } | |
1388 | ||
95954743 PA |
1389 | static void |
1390 | free_sym_cache (struct sym_cache *sym) | |
1391 | { | |
1392 | if (sym != NULL) | |
1393 | { | |
1394 | free (sym->name); | |
1395 | free (sym); | |
1396 | } | |
1397 | } | |
1398 | ||
1399 | void | |
1400 | clear_symbol_cache (struct sym_cache **symcache_p) | |
1401 | { | |
1402 | struct sym_cache *sym, *next; | |
1403 | ||
1404 | /* Check the cache first. */ | |
1405 | for (sym = *symcache_p; sym; sym = next) | |
1406 | { | |
1407 | next = sym->next; | |
1408 | free_sym_cache (sym); | |
1409 | } | |
1410 | ||
1411 | *symcache_p = NULL; | |
1412 | } | |
1413 | ||
fd500816 DJ |
1414 | /* Ask GDB for the address of NAME, and return it in ADDRP if found. |
1415 | Returns 1 if the symbol is found, 0 if it is not, -1 on error. */ | |
1416 | ||
2f2893d9 DJ |
1417 | int |
1418 | look_up_one_symbol (const char *name, CORE_ADDR *addrp) | |
1419 | { | |
1420 | char own_buf[266], *p, *q; | |
1421 | int len; | |
fd500816 | 1422 | struct sym_cache *sym; |
95954743 PA |
1423 | struct process_info *proc; |
1424 | ||
1425 | proc = current_process (); | |
fd500816 DJ |
1426 | |
1427 | /* Check the cache first. */ | |
95954743 | 1428 | for (sym = proc->symbol_cache; sym; sym = sym->next) |
fd500816 DJ |
1429 | if (strcmp (name, sym->name) == 0) |
1430 | { | |
1431 | *addrp = sym->addr; | |
1432 | return 1; | |
1433 | } | |
2f2893d9 | 1434 | |
ea025f5f DJ |
1435 | /* If we've passed the call to thread_db_look_up_symbols, then |
1436 | anything not in the cache must not exist; we're not interested | |
1437 | in any libraries loaded after that point, only in symbols in | |
1438 | libpthread.so. It might not be an appropriate time to look | |
1439 | up a symbol, e.g. while we're trying to fetch registers. */ | |
95954743 | 1440 | if (proc->all_symbols_looked_up) |
ea025f5f DJ |
1441 | return 0; |
1442 | ||
2f2893d9 DJ |
1443 | /* Send the request. */ |
1444 | strcpy (own_buf, "qSymbol:"); | |
1445 | hexify (own_buf + strlen ("qSymbol:"), name, strlen (name)); | |
1446 | if (putpkt (own_buf) < 0) | |
1447 | return -1; | |
1448 | ||
1449 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
1450 | len = getpkt (own_buf); | |
1451 | if (len < 0) | |
1452 | return -1; | |
1453 | ||
2bbe3cc1 DJ |
1454 | /* We ought to handle pretty much any packet at this point while we |
1455 | wait for the qSymbol "response". That requires re-entering the | |
1456 | main loop. For now, this is an adequate approximation; allow | |
1457 | GDB to read from memory while it figures out the address of the | |
1458 | symbol. */ | |
1459 | while (own_buf[0] == 'm') | |
1460 | { | |
1461 | CORE_ADDR mem_addr; | |
1462 | unsigned char *mem_buf; | |
1463 | unsigned int mem_len; | |
1464 | ||
1465 | decode_m_packet (&own_buf[1], &mem_addr, &mem_len); | |
bca929d3 | 1466 | mem_buf = xmalloc (mem_len); |
2bbe3cc1 DJ |
1467 | if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0) |
1468 | convert_int_to_ascii (mem_buf, own_buf, mem_len); | |
1469 | else | |
1470 | write_enn (own_buf); | |
1471 | free (mem_buf); | |
1472 | if (putpkt (own_buf) < 0) | |
1473 | return -1; | |
1474 | len = getpkt (own_buf); | |
1475 | if (len < 0) | |
1476 | return -1; | |
1477 | } | |
1b3f6016 | 1478 | |
2f2893d9 DJ |
1479 | if (strncmp (own_buf, "qSymbol:", strlen ("qSymbol:")) != 0) |
1480 | { | |
2bbe3cc1 | 1481 | warning ("Malformed response to qSymbol, ignoring: %s\n", own_buf); |
2f2893d9 DJ |
1482 | return -1; |
1483 | } | |
1484 | ||
1485 | p = own_buf + strlen ("qSymbol:"); | |
1486 | q = p; | |
1487 | while (*q && *q != ':') | |
1488 | q++; | |
1489 | ||
1490 | /* Make sure we found a value for the symbol. */ | |
1491 | if (p == q || *q == '\0') | |
1492 | return 0; | |
1493 | ||
1494 | decode_address (addrp, p, q - p); | |
fd500816 DJ |
1495 | |
1496 | /* Save the symbol in our cache. */ | |
bca929d3 DE |
1497 | sym = xmalloc (sizeof (*sym)); |
1498 | sym->name = xstrdup (name); | |
fd500816 | 1499 | sym->addr = *addrp; |
95954743 PA |
1500 | sym->next = proc->symbol_cache; |
1501 | proc->symbol_cache = sym; | |
fd500816 | 1502 | |
2f2893d9 DJ |
1503 | return 1; |
1504 | } | |
c74d0ad8 DJ |
1505 | |
1506 | void | |
bce7165d | 1507 | monitor_output (const char *msg) |
c74d0ad8 | 1508 | { |
bca929d3 | 1509 | char *buf = xmalloc (strlen (msg) * 2 + 2); |
c74d0ad8 DJ |
1510 | |
1511 | buf[0] = 'O'; | |
1512 | hexify (buf + 1, msg, 0); | |
1513 | ||
1514 | putpkt (buf); | |
1515 | free (buf); | |
1516 | } | |
255e7678 DJ |
1517 | |
1518 | /* Return a malloc allocated string with special characters from TEXT | |
1519 | replaced by entity references. */ | |
1520 | ||
1521 | char * | |
1522 | xml_escape_text (const char *text) | |
1523 | { | |
1524 | char *result; | |
1525 | int i, special; | |
1526 | ||
1527 | /* Compute the length of the result. */ | |
1528 | for (i = 0, special = 0; text[i] != '\0'; i++) | |
1529 | switch (text[i]) | |
1530 | { | |
1531 | case '\'': | |
1532 | case '\"': | |
1533 | special += 5; | |
1534 | break; | |
1535 | case '&': | |
1536 | special += 4; | |
1537 | break; | |
1538 | case '<': | |
1539 | case '>': | |
1540 | special += 3; | |
1541 | break; | |
1542 | default: | |
1543 | break; | |
1544 | } | |
1545 | ||
1546 | /* Expand the result. */ | |
bca929d3 | 1547 | result = xmalloc (i + special + 1); |
255e7678 DJ |
1548 | for (i = 0, special = 0; text[i] != '\0'; i++) |
1549 | switch (text[i]) | |
1550 | { | |
1551 | case '\'': | |
1552 | strcpy (result + i + special, "'"); | |
1553 | special += 5; | |
1554 | break; | |
1555 | case '\"': | |
1556 | strcpy (result + i + special, """); | |
1557 | special += 5; | |
1558 | break; | |
1559 | case '&': | |
1560 | strcpy (result + i + special, "&"); | |
1561 | special += 4; | |
1562 | break; | |
1563 | case '<': | |
1564 | strcpy (result + i + special, "<"); | |
1565 | special += 3; | |
1566 | break; | |
1567 | case '>': | |
1568 | strcpy (result + i + special, ">"); | |
1569 | special += 3; | |
1570 | break; | |
1571 | default: | |
1572 | result[i + special] = text[i]; | |
1573 | break; | |
1574 | } | |
1575 | result[i + special] = '\0'; | |
1576 | ||
1577 | return result; | |
1578 | } | |
07e059b5 VP |
1579 | |
1580 | void | |
1581 | buffer_grow (struct buffer *buffer, const char *data, size_t size) | |
1582 | { | |
1583 | char *new_buffer; | |
1584 | size_t new_buffer_size; | |
1585 | ||
1586 | if (size == 0) | |
1587 | return; | |
1588 | ||
1589 | new_buffer_size = buffer->buffer_size; | |
1590 | ||
1591 | if (new_buffer_size == 0) | |
1592 | new_buffer_size = 1; | |
1593 | ||
1594 | while (buffer->used_size + size > new_buffer_size) | |
1595 | new_buffer_size *= 2; | |
1596 | new_buffer = realloc (buffer->buffer, new_buffer_size); | |
1597 | if (!new_buffer) | |
1598 | abort (); | |
1599 | memcpy (new_buffer + buffer->used_size, data, size); | |
1600 | buffer->buffer = new_buffer; | |
1601 | buffer->buffer_size = new_buffer_size; | |
1602 | buffer->used_size += size; | |
1603 | } | |
1604 | ||
1605 | void | |
1606 | buffer_free (struct buffer *buffer) | |
1607 | { | |
1608 | if (!buffer) | |
1609 | return; | |
1610 | ||
1611 | free (buffer->buffer); | |
1612 | buffer->buffer = NULL; | |
1613 | buffer->buffer_size = 0; | |
1614 | buffer->used_size = 0; | |
1615 | } | |
1616 | ||
1617 | void | |
1618 | buffer_init (struct buffer *buffer) | |
1619 | { | |
1620 | memset (buffer, 0, sizeof (*buffer)); | |
1621 | } | |
1622 | ||
1623 | char* | |
1624 | buffer_finish (struct buffer *buffer) | |
1625 | { | |
1626 | char *ret = buffer->buffer; | |
1627 | buffer->buffer = NULL; | |
1628 | buffer->buffer_size = 0; | |
1629 | buffer->used_size = 0; | |
1630 | return ret; | |
1631 | } | |
1632 | ||
1633 | void | |
1634 | buffer_xml_printf (struct buffer *buffer, const char *format, ...) | |
1635 | { | |
1636 | va_list ap; | |
1637 | const char *f; | |
1638 | const char *prev; | |
1639 | int percent = 0; | |
1640 | ||
1641 | va_start (ap, format); | |
1642 | ||
1643 | prev = format; | |
1644 | for (f = format; *f; f++) | |
1645 | { | |
1646 | if (percent) | |
1647 | { | |
1b3f6016 PA |
1648 | switch (*f) |
1649 | { | |
1650 | case 's': | |
1651 | { | |
1652 | char *p; | |
1653 | char *a = va_arg (ap, char *); | |
1654 | buffer_grow (buffer, prev, f - prev - 1); | |
1655 | p = xml_escape_text (a); | |
1656 | buffer_grow_str (buffer, p); | |
1657 | free (p); | |
1658 | prev = f + 1; | |
1659 | } | |
1660 | break; | |
dc146f7c VP |
1661 | case 'd': |
1662 | { | |
1663 | int i = va_arg (ap, int); | |
1664 | char b[sizeof ("4294967295")]; | |
1665 | ||
1666 | buffer_grow (buffer, prev, f - prev - 1); | |
1667 | sprintf (b, "%d", i); | |
1668 | buffer_grow_str (buffer, b); | |
1669 | prev = f + 1; | |
1670 | } | |
1b3f6016 PA |
1671 | } |
1672 | percent = 0; | |
07e059b5 VP |
1673 | } |
1674 | else if (*f == '%') | |
1675 | percent = 1; | |
1676 | } | |
1677 | ||
1678 | buffer_grow_str (buffer, prev); | |
1679 | va_end (ap); | |
1680 | } |