Commit | Line | Data |
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c906108c | 1 | /* Remote utility routines for the remote server for GDB. |
ecd75fc8 | 2 | Copyright (C) 1986-2014 Free Software Foundation, Inc. |
c906108c | 3 | |
c5aa993b | 4 | This file is part of GDB. |
c906108c | 5 | |
c5aa993b JM |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 9 | (at your option) any later version. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
c906108c | 15 | |
c5aa993b | 16 | You should have received a copy of the GNU General Public License |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
18 | |
19 | #include "server.h" | |
20 | #include "terminal.h" | |
5b1c542e | 21 | #include "target.h" |
623b6bdf | 22 | #include "gdbthread.h" |
3aee8918 | 23 | #include "tdesc.h" |
799cdc37 | 24 | #include "dll.h" |
9c3d6531 | 25 | #include "rsp-low.h" |
799cdc37 | 26 | |
c906108c | 27 | #include <string.h> |
b80864fb | 28 | #if HAVE_SYS_IOCTL_H |
c906108c | 29 | #include <sys/ioctl.h> |
b80864fb | 30 | #endif |
68070c10 | 31 | #if HAVE_SYS_FILE_H |
c906108c | 32 | #include <sys/file.h> |
68070c10 | 33 | #endif |
b80864fb | 34 | #if HAVE_NETINET_IN_H |
c906108c | 35 | #include <netinet/in.h> |
b80864fb DJ |
36 | #endif |
37 | #if HAVE_SYS_SOCKET_H | |
c906108c | 38 | #include <sys/socket.h> |
b80864fb DJ |
39 | #endif |
40 | #if HAVE_NETDB_H | |
c906108c | 41 | #include <netdb.h> |
b80864fb DJ |
42 | #endif |
43 | #if HAVE_NETINET_TCP_H | |
c906108c | 44 | #include <netinet/tcp.h> |
b80864fb DJ |
45 | #endif |
46 | #if HAVE_SYS_IOCTL_H | |
c906108c | 47 | #include <sys/ioctl.h> |
b80864fb | 48 | #endif |
68070c10 | 49 | #if HAVE_SIGNAL_H |
c906108c | 50 | #include <signal.h> |
68070c10 PA |
51 | #endif |
52 | #if HAVE_FCNTL_H | |
c906108c | 53 | #include <fcntl.h> |
68070c10 | 54 | #endif |
cf30a8e1 C |
55 | #include <sys/time.h> |
56 | #include <unistd.h> | |
b80864fb | 57 | #if HAVE_ARPA_INET_H |
0729219d | 58 | #include <arpa/inet.h> |
b80864fb | 59 | #endif |
53ce3c39 | 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 | ||
0fb4aa4b PA |
77 | #ifndef IN_PROCESS_AGENT |
78 | ||
7390519e PA |
79 | #if USE_WIN32API |
80 | # define INVALID_DESCRIPTOR INVALID_SOCKET | |
81 | #else | |
82 | # define INVALID_DESCRIPTOR -1 | |
83 | #endif | |
84 | ||
24b066ba DE |
85 | /* Extra value for readchar_callback. */ |
86 | enum { | |
87 | /* The callback is currently not scheduled. */ | |
88 | NOT_SCHEDULED = -1 | |
89 | }; | |
90 | ||
91 | /* Status of the readchar callback. | |
92 | Either NOT_SCHEDULED or the callback id. */ | |
93 | static int readchar_callback = NOT_SCHEDULED; | |
94 | ||
bc3b5632 | 95 | static int readchar (void); |
24b066ba DE |
96 | static void reset_readchar (void); |
97 | static void reschedule (void); | |
bc3b5632 | 98 | |
fd500816 DJ |
99 | /* A cache entry for a successfully looked-up symbol. */ |
100 | struct sym_cache | |
101 | { | |
95954743 | 102 | char *name; |
fd500816 DJ |
103 | CORE_ADDR addr; |
104 | struct sym_cache *next; | |
105 | }; | |
106 | ||
c906108c | 107 | int remote_debug = 0; |
03863182 | 108 | struct ui_file *gdb_stdlog; |
c906108c | 109 | |
e0f9f062 DE |
110 | static int remote_is_stdio = 0; |
111 | ||
ec48365d PA |
112 | static gdb_fildes_t remote_desc = INVALID_DESCRIPTOR; |
113 | static gdb_fildes_t listen_desc = INVALID_DESCRIPTOR; | |
c906108c | 114 | |
0d62e5e8 DJ |
115 | /* FIXME headerize? */ |
116 | extern int using_threads; | |
117 | extern int debug_threads; | |
118 | ||
a6f3e723 SL |
119 | /* If true, then GDB has requested noack mode. */ |
120 | int noack_mode = 0; | |
121 | /* If true, then we tell GDB to use noack mode by default. */ | |
122 | int transport_is_reliable = 0; | |
123 | ||
0f48aa01 | 124 | #ifdef USE_WIN32API |
68070c10 PA |
125 | # define read(fd, buf, len) recv (fd, (char *) buf, len, 0) |
126 | # define write(fd, buf, len) send (fd, (char *) buf, len, 0) | |
0f48aa01 DJ |
127 | #endif |
128 | ||
8336d594 PA |
129 | int |
130 | gdb_connected (void) | |
131 | { | |
132 | return remote_desc != INVALID_DESCRIPTOR; | |
133 | } | |
134 | ||
e0f9f062 DE |
135 | /* Return true if the remote connection is over stdio. */ |
136 | ||
137 | int | |
138 | remote_connection_is_stdio (void) | |
139 | { | |
140 | return remote_is_stdio; | |
141 | } | |
142 | ||
8336d594 PA |
143 | static void |
144 | enable_async_notification (int fd) | |
145 | { | |
146 | #if defined(F_SETFL) && defined (FASYNC) | |
147 | int save_fcntl_flags; | |
148 | ||
149 | save_fcntl_flags = fcntl (fd, F_GETFL, 0); | |
150 | fcntl (fd, F_SETFL, save_fcntl_flags | FASYNC); | |
151 | #if defined (F_SETOWN) | |
152 | fcntl (fd, F_SETOWN, getpid ()); | |
153 | #endif | |
154 | #endif | |
155 | } | |
156 | ||
157 | static int | |
158 | handle_accept_event (int err, gdb_client_data client_data) | |
159 | { | |
160 | struct sockaddr_in sockaddr; | |
161 | socklen_t tmp; | |
162 | ||
163 | if (debug_threads) | |
87ce2a04 | 164 | debug_printf ("handling possible accept event\n"); |
8336d594 PA |
165 | |
166 | tmp = sizeof (sockaddr); | |
167 | remote_desc = accept (listen_desc, (struct sockaddr *) &sockaddr, &tmp); | |
168 | if (remote_desc == -1) | |
169 | perror_with_name ("Accept failed"); | |
170 | ||
171 | /* Enable TCP keep alive process. */ | |
172 | tmp = 1; | |
173 | setsockopt (remote_desc, SOL_SOCKET, SO_KEEPALIVE, | |
174 | (char *) &tmp, sizeof (tmp)); | |
175 | ||
176 | /* Tell TCP not to delay small packets. This greatly speeds up | |
177 | interactive response. */ | |
178 | tmp = 1; | |
179 | setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY, | |
180 | (char *) &tmp, sizeof (tmp)); | |
181 | ||
182 | #ifndef USE_WIN32API | |
8336d594 PA |
183 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply |
184 | exits when the remote side dies. */ | |
03f2bd59 JK |
185 | #endif |
186 | ||
187 | if (run_once) | |
188 | { | |
189 | #ifndef USE_WIN32API | |
190 | close (listen_desc); /* No longer need this */ | |
8336d594 | 191 | #else |
03f2bd59 | 192 | closesocket (listen_desc); /* No longer need this */ |
8336d594 | 193 | #endif |
03f2bd59 | 194 | } |
8336d594 | 195 | |
03f2bd59 JK |
196 | /* Even if !RUN_ONCE no longer notice new connections. Still keep the |
197 | descriptor open for add_file_handler to wait for a new connection. */ | |
8336d594 PA |
198 | delete_file_handler (listen_desc); |
199 | ||
200 | /* Convert IP address to string. */ | |
201 | fprintf (stderr, "Remote debugging from host %s\n", | |
202 | inet_ntoa (sockaddr.sin_addr)); | |
203 | ||
204 | enable_async_notification (remote_desc); | |
205 | ||
206 | /* Register the event loop handler. */ | |
207 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
208 | ||
209 | /* We have a new GDB connection now. If we were disconnected | |
210 | tracing, there's a window where the target could report a stop | |
211 | event to the event loop, and since we have a connection now, we'd | |
212 | try to send vStopped notifications to GDB. But, don't do that | |
213 | until GDB as selected all-stop/non-stop, and has queried the | |
214 | threads' status ('?'). */ | |
215 | target_async (0); | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
03f2bd59 JK |
220 | /* Prepare for a later connection to a remote debugger. |
221 | NAME is the filename used for communication. */ | |
222 | ||
223 | void | |
224 | remote_prepare (char *name) | |
225 | { | |
226 | char *port_str; | |
227 | #ifdef USE_WIN32API | |
228 | static int winsock_initialized; | |
229 | #endif | |
230 | int port; | |
231 | struct sockaddr_in sockaddr; | |
232 | socklen_t tmp; | |
233 | char *port_end; | |
234 | ||
e0f9f062 DE |
235 | remote_is_stdio = 0; |
236 | if (strcmp (name, STDIO_CONNECTION_NAME) == 0) | |
237 | { | |
238 | /* We need to record fact that we're using stdio sooner than the | |
239 | call to remote_open so start_inferior knows the connection is | |
240 | via stdio. */ | |
241 | remote_is_stdio = 1; | |
242 | transport_is_reliable = 1; | |
243 | return; | |
244 | } | |
245 | ||
03f2bd59 JK |
246 | port_str = strchr (name, ':'); |
247 | if (port_str == NULL) | |
248 | { | |
249 | transport_is_reliable = 0; | |
250 | return; | |
251 | } | |
252 | ||
253 | port = strtoul (port_str + 1, &port_end, 10); | |
254 | if (port_str[1] == '\0' || *port_end != '\0') | |
255 | fatal ("Bad port argument: %s", name); | |
256 | ||
257 | #ifdef USE_WIN32API | |
258 | if (!winsock_initialized) | |
259 | { | |
260 | WSADATA wsad; | |
261 | ||
262 | WSAStartup (MAKEWORD (1, 0), &wsad); | |
263 | winsock_initialized = 1; | |
264 | } | |
265 | #endif | |
266 | ||
267 | listen_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); | |
268 | if (listen_desc == -1) | |
269 | perror_with_name ("Can't open socket"); | |
270 | ||
271 | /* Allow rapid reuse of this port. */ | |
272 | tmp = 1; | |
273 | setsockopt (listen_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, | |
274 | sizeof (tmp)); | |
275 | ||
276 | sockaddr.sin_family = PF_INET; | |
277 | sockaddr.sin_port = htons (port); | |
278 | sockaddr.sin_addr.s_addr = INADDR_ANY; | |
279 | ||
280 | if (bind (listen_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) | |
281 | || listen (listen_desc, 1)) | |
282 | perror_with_name ("Can't bind address"); | |
283 | ||
284 | transport_is_reliable = 1; | |
285 | } | |
286 | ||
c906108c SS |
287 | /* Open a connection to a remote debugger. |
288 | NAME is the filename used for communication. */ | |
289 | ||
290 | void | |
fba45db2 | 291 | remote_open (char *name) |
c906108c | 292 | { |
8264bb58 DJ |
293 | char *port_str; |
294 | ||
295 | port_str = strchr (name, ':'); | |
e0f9f062 | 296 | #ifdef USE_WIN32API |
8264bb58 | 297 | if (port_str == NULL) |
e0f9f062 DE |
298 | error ("Only <host>:<port> is supported on this platform."); |
299 | #endif | |
300 | ||
301 | if (strcmp (name, STDIO_CONNECTION_NAME) == 0) | |
302 | { | |
303 | fprintf (stderr, "Remote debugging using stdio\n"); | |
304 | ||
305 | /* Use stdin as the handle of the connection. | |
306 | We only select on reads, for example. */ | |
307 | remote_desc = fileno (stdin); | |
308 | ||
309 | enable_async_notification (remote_desc); | |
310 | ||
311 | /* Register the event loop handler. */ | |
312 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
313 | } | |
314 | #ifndef USE_WIN32API | |
315 | else if (port_str == NULL) | |
c906108c | 316 | { |
8264bb58 DJ |
317 | struct stat statbuf; |
318 | ||
319 | if (stat (name, &statbuf) == 0 | |
320 | && (S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode))) | |
321 | remote_desc = open (name, O_RDWR); | |
322 | else | |
323 | { | |
324 | errno = EINVAL; | |
325 | remote_desc = -1; | |
326 | } | |
327 | ||
c906108c SS |
328 | if (remote_desc < 0) |
329 | perror_with_name ("Could not open remote device"); | |
330 | ||
331 | #ifdef HAVE_TERMIOS | |
332 | { | |
333 | struct termios termios; | |
c5aa993b | 334 | tcgetattr (remote_desc, &termios); |
c906108c SS |
335 | |
336 | termios.c_iflag = 0; | |
337 | termios.c_oflag = 0; | |
338 | termios.c_lflag = 0; | |
c5aa993b | 339 | termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 340 | termios.c_cflag |= CLOCAL | CS8; |
d0608e50 | 341 | termios.c_cc[VMIN] = 1; |
c906108c SS |
342 | termios.c_cc[VTIME] = 0; |
343 | ||
c5aa993b | 344 | tcsetattr (remote_desc, TCSANOW, &termios); |
c906108c SS |
345 | } |
346 | #endif | |
347 | ||
348 | #ifdef HAVE_TERMIO | |
349 | { | |
350 | struct termio termio; | |
351 | ioctl (remote_desc, TCGETA, &termio); | |
352 | ||
353 | termio.c_iflag = 0; | |
354 | termio.c_oflag = 0; | |
355 | termio.c_lflag = 0; | |
c5aa993b | 356 | termio.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 357 | termio.c_cflag |= CLOCAL | CS8; |
d0608e50 | 358 | termio.c_cc[VMIN] = 1; |
c906108c SS |
359 | termio.c_cc[VTIME] = 0; |
360 | ||
361 | ioctl (remote_desc, TCSETA, &termio); | |
362 | } | |
363 | #endif | |
364 | ||
365 | #ifdef HAVE_SGTTY | |
366 | { | |
367 | struct sgttyb sg; | |
368 | ||
369 | ioctl (remote_desc, TIOCGETP, &sg); | |
370 | sg.sg_flags = RAW; | |
371 | ioctl (remote_desc, TIOCSETP, &sg); | |
372 | } | |
373 | #endif | |
374 | ||
e641a1ca | 375 | fprintf (stderr, "Remote debugging using %s\n", name); |
a6f3e723 | 376 | |
8336d594 PA |
377 | enable_async_notification (remote_desc); |
378 | ||
379 | /* Register the event loop handler. */ | |
380 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
c906108c | 381 | } |
e0f9f062 | 382 | #endif /* USE_WIN32API */ |
c906108c SS |
383 | else |
384 | { | |
c906108c | 385 | int port; |
03f2bd59 | 386 | socklen_t len; |
c906108c | 387 | struct sockaddr_in sockaddr; |
c906108c | 388 | |
03f2bd59 JK |
389 | len = sizeof (sockaddr); |
390 | if (getsockname (listen_desc, | |
391 | (struct sockaddr *) &sockaddr, &len) < 0 | |
392 | || len < sizeof (sockaddr)) | |
393 | perror_with_name ("Can't determine port"); | |
394 | port = ntohs (sockaddr.sin_port); | |
6f8486da | 395 | |
6910d122 | 396 | fprintf (stderr, "Listening on port %d\n", port); |
b80864fb | 397 | fflush (stderr); |
6910d122 | 398 | |
8336d594 PA |
399 | /* Register the event loop handler. */ |
400 | add_file_handler (listen_desc, handle_accept_event, NULL); | |
c906108c | 401 | } |
c906108c SS |
402 | } |
403 | ||
404 | void | |
fba45db2 | 405 | remote_close (void) |
c906108c | 406 | { |
bd99dc85 PA |
407 | delete_file_handler (remote_desc); |
408 | ||
b80864fb DJ |
409 | #ifdef USE_WIN32API |
410 | closesocket (remote_desc); | |
411 | #else | |
e0f9f062 DE |
412 | if (! remote_connection_is_stdio ()) |
413 | close (remote_desc); | |
b80864fb | 414 | #endif |
8336d594 | 415 | remote_desc = INVALID_DESCRIPTOR; |
24b066ba DE |
416 | |
417 | reset_readchar (); | |
c906108c SS |
418 | } |
419 | ||
0fb4aa4b PA |
420 | #endif |
421 | ||
0fb4aa4b PA |
422 | #ifndef IN_PROCESS_AGENT |
423 | ||
dae5f5cf | 424 | void |
2f2893d9 DJ |
425 | decode_address (CORE_ADDR *addrp, const char *start, int len) |
426 | { | |
427 | CORE_ADDR addr; | |
428 | char ch; | |
429 | int i; | |
430 | ||
431 | addr = 0; | |
432 | for (i = 0; i < len; i++) | |
433 | { | |
434 | ch = start[i]; | |
435 | addr = addr << 4; | |
436 | addr = addr | (fromhex (ch) & 0x0f); | |
437 | } | |
438 | *addrp = addr; | |
439 | } | |
440 | ||
89be2091 DJ |
441 | const char * |
442 | decode_address_to_semicolon (CORE_ADDR *addrp, const char *start) | |
443 | { | |
444 | const char *end; | |
445 | ||
446 | end = start; | |
447 | while (*end != '\0' && *end != ';') | |
448 | end++; | |
449 | ||
450 | decode_address (addrp, start, end - start); | |
451 | ||
452 | if (*end == ';') | |
453 | end++; | |
454 | return end; | |
455 | } | |
456 | ||
0fb4aa4b PA |
457 | #endif |
458 | ||
0fb4aa4b PA |
459 | #ifndef IN_PROCESS_AGENT |
460 | ||
5ffff7c1 DJ |
461 | /* Look for a sequence of characters which can be run-length encoded. |
462 | If there are any, update *CSUM and *P. Otherwise, output the | |
463 | single character. Return the number of characters consumed. */ | |
464 | ||
465 | static int | |
466 | try_rle (char *buf, int remaining, unsigned char *csum, char **p) | |
467 | { | |
468 | int n; | |
469 | ||
470 | /* Always output the character. */ | |
471 | *csum += buf[0]; | |
472 | *(*p)++ = buf[0]; | |
473 | ||
474 | /* Don't go past '~'. */ | |
475 | if (remaining > 97) | |
476 | remaining = 97; | |
477 | ||
478 | for (n = 1; n < remaining; n++) | |
479 | if (buf[n] != buf[0]) | |
480 | break; | |
481 | ||
482 | /* N is the index of the first character not the same as buf[0]. | |
483 | buf[0] is counted twice, so by decrementing N, we get the number | |
484 | of characters the RLE sequence will replace. */ | |
485 | n--; | |
486 | ||
487 | if (n < 3) | |
488 | return 1; | |
489 | ||
490 | /* Skip the frame characters. The manual says to skip '+' and '-' | |
491 | also, but there's no reason to. Unfortunately these two unusable | |
492 | characters double the encoded length of a four byte zero | |
493 | value. */ | |
494 | while (n + 29 == '$' || n + 29 == '#') | |
495 | n--; | |
496 | ||
497 | *csum += '*'; | |
498 | *(*p)++ = '*'; | |
499 | *csum += n + 29; | |
500 | *(*p)++ = n + 29; | |
501 | ||
502 | return n + 1; | |
503 | } | |
504 | ||
0fb4aa4b PA |
505 | #endif |
506 | ||
0fb4aa4b PA |
507 | #ifndef IN_PROCESS_AGENT |
508 | ||
95954743 PA |
509 | /* Write a PTID to BUF. Returns BUF+CHARACTERS_WRITTEN. */ |
510 | ||
511 | char * | |
512 | write_ptid (char *buf, ptid_t ptid) | |
513 | { | |
514 | int pid, tid; | |
515 | ||
516 | if (multi_process) | |
517 | { | |
518 | pid = ptid_get_pid (ptid); | |
519 | if (pid < 0) | |
520 | buf += sprintf (buf, "p-%x.", -pid); | |
521 | else | |
522 | buf += sprintf (buf, "p%x.", pid); | |
523 | } | |
524 | tid = ptid_get_lwp (ptid); | |
525 | if (tid < 0) | |
526 | buf += sprintf (buf, "-%x", -tid); | |
527 | else | |
528 | buf += sprintf (buf, "%x", tid); | |
529 | ||
530 | return buf; | |
531 | } | |
532 | ||
533 | ULONGEST | |
534 | hex_or_minus_one (char *buf, char **obuf) | |
535 | { | |
536 | ULONGEST ret; | |
537 | ||
538 | if (strncmp (buf, "-1", 2) == 0) | |
539 | { | |
540 | ret = (ULONGEST) -1; | |
541 | buf += 2; | |
542 | } | |
543 | else | |
544 | buf = unpack_varlen_hex (buf, &ret); | |
545 | ||
546 | if (obuf) | |
547 | *obuf = buf; | |
548 | ||
549 | return ret; | |
550 | } | |
551 | ||
552 | /* Extract a PTID from BUF. If non-null, OBUF is set to the to one | |
553 | passed the last parsed char. Returns null_ptid on error. */ | |
554 | ptid_t | |
555 | read_ptid (char *buf, char **obuf) | |
556 | { | |
557 | char *p = buf; | |
558 | char *pp; | |
559 | ULONGEST pid = 0, tid = 0; | |
560 | ||
561 | if (*p == 'p') | |
562 | { | |
563 | /* Multi-process ptid. */ | |
564 | pp = unpack_varlen_hex (p + 1, &pid); | |
565 | if (*pp != '.') | |
566 | error ("invalid remote ptid: %s\n", p); | |
567 | ||
568 | p = pp + 1; | |
569 | ||
570 | tid = hex_or_minus_one (p, &pp); | |
571 | ||
572 | if (obuf) | |
573 | *obuf = pp; | |
574 | return ptid_build (pid, tid, 0); | |
575 | } | |
576 | ||
577 | /* No multi-process. Just a tid. */ | |
578 | tid = hex_or_minus_one (p, &pp); | |
579 | ||
580 | /* Since the stub is not sending a process id, then default to | |
581 | what's in the current inferior. */ | |
fbd5db48 | 582 | pid = ptid_get_pid (current_ptid); |
95954743 PA |
583 | |
584 | if (obuf) | |
585 | *obuf = pp; | |
586 | return ptid_build (pid, tid, 0); | |
587 | } | |
588 | ||
e0f9f062 DE |
589 | /* Write COUNT bytes in BUF to the client. |
590 | The result is the number of bytes written or -1 if error. | |
591 | This may return less than COUNT. */ | |
592 | ||
593 | static int | |
594 | write_prim (const void *buf, int count) | |
595 | { | |
596 | if (remote_connection_is_stdio ()) | |
597 | return write (fileno (stdout), buf, count); | |
598 | else | |
599 | return write (remote_desc, buf, count); | |
600 | } | |
601 | ||
602 | /* Read COUNT bytes from the client and store in BUF. | |
603 | The result is the number of bytes read or -1 if error. | |
604 | This may return less than COUNT. */ | |
605 | ||
606 | static int | |
607 | read_prim (void *buf, int count) | |
608 | { | |
609 | if (remote_connection_is_stdio ()) | |
610 | return read (fileno (stdin), buf, count); | |
611 | else | |
612 | return read (remote_desc, buf, count); | |
613 | } | |
614 | ||
c906108c | 615 | /* Send a packet to the remote machine, with error checking. |
01f9e8fa DJ |
616 | The data of the packet is in BUF, and the length of the |
617 | packet is in CNT. Returns >= 0 on success, -1 otherwise. */ | |
c906108c | 618 | |
bd99dc85 PA |
619 | static int |
620 | putpkt_binary_1 (char *buf, int cnt, int is_notif) | |
c906108c SS |
621 | { |
622 | int i; | |
623 | unsigned char csum = 0; | |
0a30fbc4 | 624 | char *buf2; |
c906108c | 625 | char *p; |
bc3b5632 | 626 | int cc; |
c906108c | 627 | |
e6edda56 | 628 | buf2 = xmalloc (strlen ("$") + cnt + strlen ("#nn") + 1); |
0a30fbc4 | 629 | |
c906108c SS |
630 | /* Copy the packet into buffer BUF2, encapsulating it |
631 | and giving it a checksum. */ | |
632 | ||
633 | p = buf2; | |
bd99dc85 PA |
634 | if (is_notif) |
635 | *p++ = '%'; | |
636 | else | |
637 | *p++ = '$'; | |
c906108c | 638 | |
5ffff7c1 DJ |
639 | for (i = 0; i < cnt;) |
640 | i += try_rle (buf + i, cnt - i, &csum, &p); | |
641 | ||
c906108c SS |
642 | *p++ = '#'; |
643 | *p++ = tohex ((csum >> 4) & 0xf); | |
644 | *p++ = tohex (csum & 0xf); | |
645 | ||
646 | *p = '\0'; | |
647 | ||
648 | /* Send it over and over until we get a positive ack. */ | |
649 | ||
650 | do | |
651 | { | |
e0f9f062 | 652 | if (write_prim (buf2, p - buf2) != p - buf2) |
c906108c SS |
653 | { |
654 | perror ("putpkt(write)"); | |
f88c79e6 | 655 | free (buf2); |
c906108c SS |
656 | return -1; |
657 | } | |
658 | ||
bd99dc85 | 659 | if (noack_mode || is_notif) |
a6f3e723 SL |
660 | { |
661 | /* Don't expect an ack then. */ | |
662 | if (remote_debug) | |
663 | { | |
bd99dc85 PA |
664 | if (is_notif) |
665 | fprintf (stderr, "putpkt (\"%s\"); [notif]\n", buf2); | |
666 | else | |
667 | fprintf (stderr, "putpkt (\"%s\"); [noack mode]\n", buf2); | |
a6f3e723 SL |
668 | fflush (stderr); |
669 | } | |
670 | break; | |
671 | } | |
672 | ||
c906108c | 673 | if (remote_debug) |
0d62e5e8 DJ |
674 | { |
675 | fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2); | |
676 | fflush (stderr); | |
677 | } | |
0d62e5e8 | 678 | |
bc3b5632 | 679 | cc = readchar (); |
c906108c | 680 | |
bc3b5632 DE |
681 | if (cc < 0) |
682 | { | |
0a30fbc4 | 683 | free (buf2); |
c906108c SS |
684 | return -1; |
685 | } | |
0d62e5e8 | 686 | |
bc3b5632 DE |
687 | if (remote_debug) |
688 | { | |
689 | fprintf (stderr, "[received '%c' (0x%x)]\n", cc, cc); | |
690 | fflush (stderr); | |
691 | } | |
692 | ||
0d62e5e8 | 693 | /* Check for an input interrupt while we're here. */ |
bc3b5632 | 694 | if (cc == '\003' && current_inferior != NULL) |
ef57601b | 695 | (*the_target->request_interrupt) (); |
c906108c | 696 | } |
bc3b5632 | 697 | while (cc != '+'); |
c906108c | 698 | |
0a30fbc4 | 699 | free (buf2); |
c906108c SS |
700 | return 1; /* Success! */ |
701 | } | |
702 | ||
bd99dc85 PA |
703 | int |
704 | putpkt_binary (char *buf, int cnt) | |
705 | { | |
706 | return putpkt_binary_1 (buf, cnt, 0); | |
707 | } | |
708 | ||
01f9e8fa DJ |
709 | /* Send a packet to the remote machine, with error checking. The data |
710 | of the packet is in BUF, and the packet should be a NUL-terminated | |
711 | string. Returns >= 0 on success, -1 otherwise. */ | |
712 | ||
713 | int | |
714 | putpkt (char *buf) | |
715 | { | |
716 | return putpkt_binary (buf, strlen (buf)); | |
717 | } | |
718 | ||
bd99dc85 PA |
719 | int |
720 | putpkt_notif (char *buf) | |
721 | { | |
722 | return putpkt_binary_1 (buf, strlen (buf), 1); | |
723 | } | |
724 | ||
c906108c SS |
725 | /* Come here when we get an input interrupt from the remote side. This |
726 | interrupt should only be active while we are waiting for the child to do | |
bc3b5632 DE |
727 | something. Thus this assumes readchar:bufcnt is 0. |
728 | About the only thing that should come through is a ^C, which | |
ef57601b | 729 | will cause us to request child interruption. */ |
c906108c SS |
730 | |
731 | static void | |
0a30fbc4 | 732 | input_interrupt (int unused) |
c906108c | 733 | { |
cf30a8e1 C |
734 | fd_set readset; |
735 | struct timeval immediate = { 0, 0 }; | |
c906108c | 736 | |
cf30a8e1 C |
737 | /* Protect against spurious interrupts. This has been observed to |
738 | be a problem under NetBSD 1.4 and 1.5. */ | |
c906108c | 739 | |
cf30a8e1 C |
740 | FD_ZERO (&readset); |
741 | FD_SET (remote_desc, &readset); | |
742 | if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) | |
c906108c | 743 | { |
cf30a8e1 | 744 | int cc; |
fd500816 | 745 | char c = 0; |
7390519e | 746 | |
e0f9f062 | 747 | cc = read_prim (&c, 1); |
c906108c | 748 | |
2d717e4f | 749 | if (cc != 1 || c != '\003' || current_inferior == NULL) |
cf30a8e1 | 750 | { |
fd500816 DJ |
751 | fprintf (stderr, "input_interrupt, count = %d c = %d ('%c')\n", |
752 | cc, c, c); | |
cf30a8e1 C |
753 | return; |
754 | } | |
7390519e | 755 | |
ef57601b | 756 | (*the_target->request_interrupt) (); |
cf30a8e1 | 757 | } |
c906108c | 758 | } |
7390519e PA |
759 | |
760 | /* Check if the remote side sent us an interrupt request (^C). */ | |
761 | void | |
762 | check_remote_input_interrupt_request (void) | |
763 | { | |
764 | /* This function may be called before establishing communications, | |
765 | therefore we need to validate the remote descriptor. */ | |
766 | ||
767 | if (remote_desc == INVALID_DESCRIPTOR) | |
768 | return; | |
769 | ||
770 | input_interrupt (0); | |
771 | } | |
b80864fb DJ |
772 | |
773 | /* Asynchronous I/O support. SIGIO must be enabled when waiting, in order to | |
774 | accept Control-C from the client, and must be disabled when talking to | |
775 | the client. */ | |
c906108c | 776 | |
a20d5e98 | 777 | static void |
62ea82f5 DJ |
778 | unblock_async_io (void) |
779 | { | |
b80864fb | 780 | #ifndef USE_WIN32API |
62ea82f5 | 781 | sigset_t sigio_set; |
a20d5e98 | 782 | |
62ea82f5 DJ |
783 | sigemptyset (&sigio_set); |
784 | sigaddset (&sigio_set, SIGIO); | |
785 | sigprocmask (SIG_UNBLOCK, &sigio_set, NULL); | |
b80864fb | 786 | #endif |
62ea82f5 DJ |
787 | } |
788 | ||
ac8c974e AR |
789 | #ifdef __QNX__ |
790 | static void | |
791 | nto_comctrl (int enable) | |
792 | { | |
793 | struct sigevent event; | |
794 | ||
795 | if (enable) | |
796 | { | |
797 | event.sigev_notify = SIGEV_SIGNAL_THREAD; | |
798 | event.sigev_signo = SIGIO; | |
799 | event.sigev_code = 0; | |
800 | event.sigev_value.sival_ptr = NULL; | |
801 | event.sigev_priority = -1; | |
802 | ionotify (remote_desc, _NOTIFY_ACTION_POLLARM, _NOTIFY_COND_INPUT, | |
803 | &event); | |
804 | } | |
805 | else | |
806 | ionotify (remote_desc, _NOTIFY_ACTION_POLL, _NOTIFY_COND_INPUT, NULL); | |
807 | } | |
808 | #endif /* __QNX__ */ | |
809 | ||
810 | ||
fd500816 DJ |
811 | /* Current state of asynchronous I/O. */ |
812 | static int async_io_enabled; | |
813 | ||
814 | /* Enable asynchronous I/O. */ | |
c906108c | 815 | void |
fba45db2 | 816 | enable_async_io (void) |
c906108c | 817 | { |
fd500816 DJ |
818 | if (async_io_enabled) |
819 | return; | |
820 | ||
b80864fb | 821 | #ifndef USE_WIN32API |
c906108c | 822 | signal (SIGIO, input_interrupt); |
b80864fb | 823 | #endif |
fd500816 | 824 | async_io_enabled = 1; |
ac8c974e AR |
825 | #ifdef __QNX__ |
826 | nto_comctrl (1); | |
827 | #endif /* __QNX__ */ | |
c906108c SS |
828 | } |
829 | ||
fd500816 | 830 | /* Disable asynchronous I/O. */ |
c906108c | 831 | void |
fba45db2 | 832 | disable_async_io (void) |
c906108c | 833 | { |
fd500816 DJ |
834 | if (!async_io_enabled) |
835 | return; | |
836 | ||
b80864fb | 837 | #ifndef USE_WIN32API |
c906108c | 838 | signal (SIGIO, SIG_IGN); |
b80864fb | 839 | #endif |
fd500816 | 840 | async_io_enabled = 0; |
ac8c974e AR |
841 | #ifdef __QNX__ |
842 | nto_comctrl (0); | |
843 | #endif /* __QNX__ */ | |
844 | ||
c906108c SS |
845 | } |
846 | ||
a20d5e98 DJ |
847 | void |
848 | initialize_async_io (void) | |
849 | { | |
850 | /* Make sure that async I/O starts disabled. */ | |
851 | async_io_enabled = 1; | |
852 | disable_async_io (); | |
853 | ||
854 | /* Make sure the signal is unblocked. */ | |
855 | unblock_async_io (); | |
856 | } | |
857 | ||
24b066ba DE |
858 | /* Internal buffer used by readchar. |
859 | These are global to readchar because reschedule_remote needs to be | |
860 | able to tell whether the buffer is empty. */ | |
861 | ||
862 | static unsigned char readchar_buf[BUFSIZ]; | |
863 | static int readchar_bufcnt = 0; | |
864 | static unsigned char *readchar_bufp; | |
865 | ||
c906108c SS |
866 | /* Returns next char from remote GDB. -1 if error. */ |
867 | ||
868 | static int | |
fba45db2 | 869 | readchar (void) |
c906108c | 870 | { |
24b066ba | 871 | int ch; |
c906108c | 872 | |
24b066ba DE |
873 | if (readchar_bufcnt == 0) |
874 | { | |
e0f9f062 | 875 | readchar_bufcnt = read_prim (readchar_buf, sizeof (readchar_buf)); |
c906108c | 876 | |
24b066ba DE |
877 | if (readchar_bufcnt <= 0) |
878 | { | |
879 | if (readchar_bufcnt == 0) | |
880 | fprintf (stderr, "readchar: Got EOF\n"); | |
881 | else | |
882 | perror ("readchar"); | |
c906108c | 883 | |
24b066ba DE |
884 | return -1; |
885 | } | |
c906108c | 886 | |
24b066ba | 887 | readchar_bufp = readchar_buf; |
c906108c SS |
888 | } |
889 | ||
24b066ba DE |
890 | readchar_bufcnt--; |
891 | ch = *readchar_bufp++; | |
892 | reschedule (); | |
893 | return ch; | |
894 | } | |
895 | ||
896 | /* Reset the readchar state machine. */ | |
897 | ||
898 | static void | |
899 | reset_readchar (void) | |
900 | { | |
901 | readchar_bufcnt = 0; | |
902 | if (readchar_callback != NOT_SCHEDULED) | |
903 | { | |
904 | delete_callback_event (readchar_callback); | |
905 | readchar_callback = NOT_SCHEDULED; | |
906 | } | |
907 | } | |
908 | ||
909 | /* Process remaining data in readchar_buf. */ | |
910 | ||
911 | static int | |
912 | process_remaining (void *context) | |
913 | { | |
914 | int res; | |
915 | ||
916 | /* This is a one-shot event. */ | |
917 | readchar_callback = NOT_SCHEDULED; | |
918 | ||
919 | if (readchar_bufcnt > 0) | |
920 | res = handle_serial_event (0, NULL); | |
921 | else | |
922 | res = 0; | |
923 | ||
924 | return res; | |
925 | } | |
926 | ||
927 | /* If there is still data in the buffer, queue another event to process it, | |
928 | we can't sleep in select yet. */ | |
929 | ||
930 | static void | |
931 | reschedule (void) | |
932 | { | |
933 | if (readchar_bufcnt > 0 && readchar_callback == NOT_SCHEDULED) | |
934 | readchar_callback = append_callback_event (process_remaining, NULL); | |
c906108c SS |
935 | } |
936 | ||
937 | /* Read a packet from the remote machine, with error checking, | |
938 | and store it in BUF. Returns length of packet, or negative if error. */ | |
939 | ||
940 | int | |
fba45db2 | 941 | getpkt (char *buf) |
c906108c SS |
942 | { |
943 | char *bp; | |
944 | unsigned char csum, c1, c2; | |
945 | int c; | |
946 | ||
947 | while (1) | |
948 | { | |
949 | csum = 0; | |
950 | ||
951 | while (1) | |
952 | { | |
953 | c = readchar (); | |
954 | if (c == '$') | |
955 | break; | |
956 | if (remote_debug) | |
0d62e5e8 DJ |
957 | { |
958 | fprintf (stderr, "[getpkt: discarding char '%c']\n", c); | |
959 | fflush (stderr); | |
960 | } | |
961 | ||
c906108c SS |
962 | if (c < 0) |
963 | return -1; | |
964 | } | |
965 | ||
966 | bp = buf; | |
967 | while (1) | |
968 | { | |
969 | c = readchar (); | |
970 | if (c < 0) | |
971 | return -1; | |
972 | if (c == '#') | |
973 | break; | |
974 | *bp++ = c; | |
975 | csum += c; | |
976 | } | |
977 | *bp = 0; | |
978 | ||
979 | c1 = fromhex (readchar ()); | |
980 | c2 = fromhex (readchar ()); | |
c5aa993b | 981 | |
c906108c SS |
982 | if (csum == (c1 << 4) + c2) |
983 | break; | |
984 | ||
a6f3e723 SL |
985 | if (noack_mode) |
986 | { | |
493e2a69 MS |
987 | fprintf (stderr, |
988 | "Bad checksum, sentsum=0x%x, csum=0x%x, " | |
989 | "buf=%s [no-ack-mode, Bad medium?]\n", | |
a6f3e723 SL |
990 | (c1 << 4) + c2, csum, buf); |
991 | /* Not much we can do, GDB wasn't expecting an ack/nac. */ | |
992 | break; | |
993 | } | |
994 | ||
c906108c SS |
995 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", |
996 | (c1 << 4) + c2, csum, buf); | |
e0f9f062 | 997 | if (write_prim ("-", 1) != 1) |
e581f2b4 | 998 | return -1; |
c906108c SS |
999 | } |
1000 | ||
a6f3e723 | 1001 | if (!noack_mode) |
0d62e5e8 | 1002 | { |
a6f3e723 SL |
1003 | if (remote_debug) |
1004 | { | |
1005 | fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf); | |
1006 | fflush (stderr); | |
1007 | } | |
c906108c | 1008 | |
e0f9f062 | 1009 | if (write_prim ("+", 1) != 1) |
e581f2b4 | 1010 | return -1; |
c906108c | 1011 | |
a6f3e723 SL |
1012 | if (remote_debug) |
1013 | { | |
1014 | fprintf (stderr, "[sent ack]\n"); | |
1015 | fflush (stderr); | |
1016 | } | |
0d62e5e8 | 1017 | } |
86b1f9c5 PM |
1018 | else |
1019 | { | |
1020 | if (remote_debug) | |
1021 | { | |
1022 | fprintf (stderr, "getpkt (\"%s\"); [no ack sent] \n", buf); | |
1023 | fflush (stderr); | |
1024 | } | |
1025 | } | |
0d62e5e8 | 1026 | |
c906108c SS |
1027 | return bp - buf; |
1028 | } | |
1029 | ||
1030 | void | |
fba45db2 | 1031 | write_ok (char *buf) |
c906108c SS |
1032 | { |
1033 | buf[0] = 'O'; | |
1034 | buf[1] = 'K'; | |
1035 | buf[2] = '\0'; | |
1036 | } | |
1037 | ||
1038 | void | |
fba45db2 | 1039 | write_enn (char *buf) |
c906108c | 1040 | { |
c89dc5d4 | 1041 | /* Some day, we should define the meanings of the error codes... */ |
c906108c | 1042 | buf[0] = 'E'; |
c89dc5d4 DJ |
1043 | buf[1] = '0'; |
1044 | buf[2] = '1'; | |
c906108c SS |
1045 | buf[3] = '\0'; |
1046 | } | |
1047 | ||
0fb4aa4b PA |
1048 | #endif |
1049 | ||
0fb4aa4b | 1050 | #ifndef IN_PROCESS_AGENT |
c906108c | 1051 | |
c906108c | 1052 | static char * |
442ea881 | 1053 | outreg (struct regcache *regcache, int regno, char *buf) |
c906108c | 1054 | { |
5c44784c JM |
1055 | if ((regno >> 12) != 0) |
1056 | *buf++ = tohex ((regno >> 12) & 0xf); | |
1057 | if ((regno >> 8) != 0) | |
1058 | *buf++ = tohex ((regno >> 8) & 0xf); | |
1059 | *buf++ = tohex ((regno >> 4) & 0xf); | |
c906108c SS |
1060 | *buf++ = tohex (regno & 0xf); |
1061 | *buf++ = ':'; | |
442ea881 | 1062 | collect_register_as_string (regcache, regno, buf); |
3aee8918 | 1063 | buf += 2 * register_size (regcache->tdesc, regno); |
c906108c SS |
1064 | *buf++ = ';'; |
1065 | ||
1066 | return buf; | |
1067 | } | |
1068 | ||
0d62e5e8 DJ |
1069 | void |
1070 | new_thread_notify (int id) | |
1071 | { | |
1072 | char own_buf[256]; | |
1073 | ||
1074 | /* The `n' response is not yet part of the remote protocol. Do nothing. */ | |
1075 | if (1) | |
1076 | return; | |
1077 | ||
1078 | if (server_waiting == 0) | |
1079 | return; | |
1080 | ||
1081 | sprintf (own_buf, "n%x", id); | |
1082 | disable_async_io (); | |
1083 | putpkt (own_buf); | |
1084 | enable_async_io (); | |
1085 | } | |
1086 | ||
1087 | void | |
1088 | dead_thread_notify (int id) | |
1089 | { | |
1090 | char own_buf[256]; | |
1091 | ||
1092 | /* The `x' response is not yet part of the remote protocol. Do nothing. */ | |
1093 | if (1) | |
1094 | return; | |
1095 | ||
1096 | sprintf (own_buf, "x%x", id); | |
1097 | disable_async_io (); | |
1098 | putpkt (own_buf); | |
1099 | enable_async_io (); | |
1100 | } | |
1101 | ||
c906108c | 1102 | void |
95954743 | 1103 | prepare_resume_reply (char *buf, ptid_t ptid, |
5b1c542e | 1104 | struct target_waitstatus *status) |
c906108c | 1105 | { |
5b1c542e | 1106 | if (debug_threads) |
87ce2a04 DE |
1107 | debug_printf ("Writing resume reply for %s:%d\n", |
1108 | target_pid_to_str (ptid), status->kind); | |
c906108c | 1109 | |
5b1c542e | 1110 | switch (status->kind) |
c906108c | 1111 | { |
5b1c542e PA |
1112 | case TARGET_WAITKIND_STOPPED: |
1113 | { | |
1114 | struct thread_info *saved_inferior; | |
1115 | const char **regp; | |
442ea881 | 1116 | struct regcache *regcache; |
e013ee27 | 1117 | |
5b1c542e PA |
1118 | sprintf (buf, "T%02x", status->value.sig); |
1119 | buf += strlen (buf); | |
e013ee27 | 1120 | |
5b1c542e | 1121 | saved_inferior = current_inferior; |
e013ee27 | 1122 | |
e09875d4 | 1123 | current_inferior = find_thread_ptid (ptid); |
e013ee27 | 1124 | |
3aee8918 PA |
1125 | regp = current_target_desc ()->expedite_regs; |
1126 | ||
442ea881 PA |
1127 | regcache = get_thread_regcache (current_inferior, 1); |
1128 | ||
5b1c542e PA |
1129 | if (the_target->stopped_by_watchpoint != NULL |
1130 | && (*the_target->stopped_by_watchpoint) ()) | |
1131 | { | |
1132 | CORE_ADDR addr; | |
1133 | int i; | |
c906108c | 1134 | |
5b1c542e PA |
1135 | strncpy (buf, "watch:", 6); |
1136 | buf += 6; | |
0d62e5e8 | 1137 | |
5b1c542e | 1138 | addr = (*the_target->stopped_data_address) (); |
255e7678 | 1139 | |
5b1c542e PA |
1140 | /* Convert each byte of the address into two hexadecimal |
1141 | chars. Note that we take sizeof (void *) instead of | |
1142 | sizeof (addr); this is to avoid sending a 64-bit | |
1143 | address to a 32-bit GDB. */ | |
1144 | for (i = sizeof (void *) * 2; i > 0; i--) | |
1145 | *buf++ = tohex ((addr >> (i - 1) * 4) & 0xf); | |
1146 | *buf++ = ';'; | |
1147 | } | |
1148 | ||
1149 | while (*regp) | |
1150 | { | |
3aee8918 | 1151 | buf = outreg (regcache, find_regno (regcache->tdesc, *regp), buf); |
5b1c542e PA |
1152 | regp ++; |
1153 | } | |
5472f405 | 1154 | *buf = '\0'; |
5b1c542e PA |
1155 | |
1156 | /* Formerly, if the debugger had not used any thread features | |
1157 | we would not burden it with a thread status response. This | |
1158 | was for the benefit of GDB 4.13 and older. However, in | |
1159 | recent GDB versions the check (``if (cont_thread != 0)'') | |
1160 | does not have the desired effect because of sillyness in | |
1161 | the way that the remote protocol handles specifying a | |
1162 | thread. Since thread support relies on qSymbol support | |
1163 | anyway, assume GDB can handle threads. */ | |
1164 | ||
1165 | if (using_threads && !disable_packet_Tthread) | |
1166 | { | |
1167 | /* This if (1) ought to be unnecessary. But remote_wait | |
1168 | in GDB will claim this event belongs to inferior_ptid | |
1169 | if we do not specify a thread, and there's no way for | |
1170 | gdbserver to know what inferior_ptid is. */ | |
95954743 | 1171 | if (1 || !ptid_equal (general_thread, ptid)) |
5b1c542e | 1172 | { |
dc146f7c | 1173 | int core = -1; |
bd99dc85 PA |
1174 | /* In non-stop, don't change the general thread behind |
1175 | GDB's back. */ | |
1176 | if (!non_stop) | |
1177 | general_thread = ptid; | |
95954743 PA |
1178 | sprintf (buf, "thread:"); |
1179 | buf += strlen (buf); | |
1180 | buf = write_ptid (buf, ptid); | |
1181 | strcat (buf, ";"); | |
5b1c542e | 1182 | buf += strlen (buf); |
dc146f7c | 1183 | |
3e10640f YQ |
1184 | core = target_core_of_thread (ptid); |
1185 | ||
dc146f7c VP |
1186 | if (core != -1) |
1187 | { | |
1188 | sprintf (buf, "core:"); | |
1189 | buf += strlen (buf); | |
1190 | sprintf (buf, "%x", core); | |
1191 | strcat (buf, ";"); | |
1192 | buf += strlen (buf); | |
1193 | } | |
5b1c542e PA |
1194 | } |
1195 | } | |
1196 | ||
1197 | if (dlls_changed) | |
1198 | { | |
1199 | strcpy (buf, "library:;"); | |
1200 | buf += strlen (buf); | |
1201 | dlls_changed = 0; | |
1202 | } | |
1203 | ||
1204 | current_inferior = saved_inferior; | |
1205 | } | |
1206 | break; | |
1207 | case TARGET_WAITKIND_EXITED: | |
95954743 PA |
1208 | if (multi_process) |
1209 | sprintf (buf, "W%x;process:%x", | |
1210 | status->value.integer, ptid_get_pid (ptid)); | |
1211 | else | |
1212 | sprintf (buf, "W%02x", status->value.integer); | |
5b1c542e PA |
1213 | break; |
1214 | case TARGET_WAITKIND_SIGNALLED: | |
95954743 PA |
1215 | if (multi_process) |
1216 | sprintf (buf, "X%x;process:%x", | |
1217 | status->value.sig, ptid_get_pid (ptid)); | |
1218 | else | |
1219 | sprintf (buf, "X%02x", status->value.sig); | |
5b1c542e PA |
1220 | break; |
1221 | default: | |
1222 | error ("unhandled waitkind"); | |
1223 | break; | |
c906108c | 1224 | } |
c906108c SS |
1225 | } |
1226 | ||
1227 | void | |
fba45db2 | 1228 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
c906108c SS |
1229 | { |
1230 | int i = 0, j = 0; | |
1231 | char ch; | |
1232 | *mem_addr_ptr = *len_ptr = 0; | |
1233 | ||
1234 | while ((ch = from[i++]) != ',') | |
1235 | { | |
1236 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1237 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1238 | } | |
1239 | ||
1240 | for (j = 0; j < 4; j++) | |
1241 | { | |
1242 | if ((ch = from[i++]) == 0) | |
1243 | break; | |
1244 | *len_ptr = *len_ptr << 4; | |
1245 | *len_ptr |= fromhex (ch) & 0x0f; | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | void | |
fba45db2 | 1250 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
fa593d66 | 1251 | unsigned char **to_p) |
c906108c SS |
1252 | { |
1253 | int i = 0; | |
1254 | char ch; | |
1255 | *mem_addr_ptr = *len_ptr = 0; | |
1256 | ||
1257 | while ((ch = from[i++]) != ',') | |
1258 | { | |
1259 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1260 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1261 | } | |
1262 | ||
1263 | while ((ch = from[i++]) != ':') | |
1264 | { | |
1265 | *len_ptr = *len_ptr << 4; | |
1266 | *len_ptr |= fromhex (ch) & 0x0f; | |
1267 | } | |
1268 | ||
fa593d66 PA |
1269 | if (*to_p == NULL) |
1270 | *to_p = xmalloc (*len_ptr); | |
1271 | ||
a7191e8b | 1272 | hex2bin (&from[i++], *to_p, *len_ptr); |
c906108c | 1273 | } |
2f2893d9 | 1274 | |
01f9e8fa DJ |
1275 | int |
1276 | decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr, | |
fa593d66 | 1277 | unsigned int *len_ptr, unsigned char **to_p) |
01f9e8fa DJ |
1278 | { |
1279 | int i = 0; | |
1280 | char ch; | |
1281 | *mem_addr_ptr = *len_ptr = 0; | |
1282 | ||
1283 | while ((ch = from[i++]) != ',') | |
1284 | { | |
1285 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1286 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1287 | } | |
1288 | ||
1289 | while ((ch = from[i++]) != ':') | |
1290 | { | |
1291 | *len_ptr = *len_ptr << 4; | |
1292 | *len_ptr |= fromhex (ch) & 0x0f; | |
1293 | } | |
1294 | ||
fa593d66 PA |
1295 | if (*to_p == NULL) |
1296 | *to_p = xmalloc (*len_ptr); | |
1297 | ||
01f9e8fa | 1298 | if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i, |
fa593d66 | 1299 | *to_p, *len_ptr) != *len_ptr) |
01f9e8fa DJ |
1300 | return -1; |
1301 | ||
1302 | return 0; | |
1303 | } | |
1304 | ||
0e7f50da | 1305 | /* Decode a qXfer write request. */ |
d08aafef | 1306 | |
0e7f50da | 1307 | int |
d08aafef | 1308 | decode_xfer_write (char *buf, int packet_len, CORE_ADDR *offset, |
0e7f50da UW |
1309 | unsigned int *len, unsigned char *data) |
1310 | { | |
1311 | char ch; | |
d08aafef | 1312 | char *b = buf; |
0e7f50da UW |
1313 | |
1314 | /* Extract the offset. */ | |
1315 | *offset = 0; | |
1316 | while ((ch = *buf++) != ':') | |
1317 | { | |
1318 | *offset = *offset << 4; | |
1319 | *offset |= fromhex (ch) & 0x0f; | |
1320 | } | |
1321 | ||
1322 | /* Get encoded data. */ | |
d08aafef | 1323 | packet_len -= buf - b; |
0e7f50da UW |
1324 | *len = remote_unescape_input ((const gdb_byte *) buf, packet_len, |
1325 | data, packet_len); | |
1326 | return 0; | |
1327 | } | |
1328 | ||
08388c79 DE |
1329 | /* Decode the parameters of a qSearch:memory packet. */ |
1330 | ||
1331 | int | |
1332 | decode_search_memory_packet (const char *buf, int packet_len, | |
1333 | CORE_ADDR *start_addrp, | |
1334 | CORE_ADDR *search_space_lenp, | |
1335 | gdb_byte *pattern, unsigned int *pattern_lenp) | |
1336 | { | |
1337 | const char *p = buf; | |
1338 | ||
1339 | p = decode_address_to_semicolon (start_addrp, p); | |
1340 | p = decode_address_to_semicolon (search_space_lenp, p); | |
1341 | packet_len -= p - buf; | |
1342 | *pattern_lenp = remote_unescape_input ((const gdb_byte *) p, packet_len, | |
1343 | pattern, packet_len); | |
1344 | return 0; | |
1345 | } | |
1346 | ||
95954743 PA |
1347 | static void |
1348 | free_sym_cache (struct sym_cache *sym) | |
1349 | { | |
1350 | if (sym != NULL) | |
1351 | { | |
1352 | free (sym->name); | |
1353 | free (sym); | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | void | |
1358 | clear_symbol_cache (struct sym_cache **symcache_p) | |
1359 | { | |
1360 | struct sym_cache *sym, *next; | |
1361 | ||
1362 | /* Check the cache first. */ | |
1363 | for (sym = *symcache_p; sym; sym = next) | |
1364 | { | |
1365 | next = sym->next; | |
1366 | free_sym_cache (sym); | |
1367 | } | |
1368 | ||
1369 | *symcache_p = NULL; | |
1370 | } | |
1371 | ||
9836d6ea PA |
1372 | /* Get the address of NAME, and return it in ADDRP if found. if |
1373 | MAY_ASK_GDB is false, assume symbol cache misses are failures. | |
fd500816 DJ |
1374 | Returns 1 if the symbol is found, 0 if it is not, -1 on error. */ |
1375 | ||
2f2893d9 | 1376 | int |
9836d6ea | 1377 | look_up_one_symbol (const char *name, CORE_ADDR *addrp, int may_ask_gdb) |
2f2893d9 DJ |
1378 | { |
1379 | char own_buf[266], *p, *q; | |
1380 | int len; | |
fd500816 | 1381 | struct sym_cache *sym; |
95954743 PA |
1382 | struct process_info *proc; |
1383 | ||
1384 | proc = current_process (); | |
fd500816 DJ |
1385 | |
1386 | /* Check the cache first. */ | |
95954743 | 1387 | for (sym = proc->symbol_cache; sym; sym = sym->next) |
fd500816 DJ |
1388 | if (strcmp (name, sym->name) == 0) |
1389 | { | |
1390 | *addrp = sym->addr; | |
1391 | return 1; | |
1392 | } | |
2f2893d9 | 1393 | |
9836d6ea PA |
1394 | /* It might not be an appropriate time to look up a symbol, |
1395 | e.g. while we're trying to fetch registers. */ | |
1396 | if (!may_ask_gdb) | |
ea025f5f DJ |
1397 | return 0; |
1398 | ||
2f2893d9 DJ |
1399 | /* Send the request. */ |
1400 | strcpy (own_buf, "qSymbol:"); | |
971dc0b8 TT |
1401 | bin2hex ((const gdb_byte *) name, own_buf + strlen ("qSymbol:"), |
1402 | strlen (name)); | |
2f2893d9 DJ |
1403 | if (putpkt (own_buf) < 0) |
1404 | return -1; | |
1405 | ||
1406 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
1407 | len = getpkt (own_buf); | |
1408 | if (len < 0) | |
1409 | return -1; | |
1410 | ||
2bbe3cc1 DJ |
1411 | /* We ought to handle pretty much any packet at this point while we |
1412 | wait for the qSymbol "response". That requires re-entering the | |
1413 | main loop. For now, this is an adequate approximation; allow | |
1414 | GDB to read from memory while it figures out the address of the | |
1415 | symbol. */ | |
1416 | while (own_buf[0] == 'm') | |
1417 | { | |
1418 | CORE_ADDR mem_addr; | |
1419 | unsigned char *mem_buf; | |
1420 | unsigned int mem_len; | |
1421 | ||
1422 | decode_m_packet (&own_buf[1], &mem_addr, &mem_len); | |
bca929d3 | 1423 | mem_buf = xmalloc (mem_len); |
2bbe3cc1 | 1424 | if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0) |
e9371aff | 1425 | bin2hex (mem_buf, own_buf, mem_len); |
2bbe3cc1 DJ |
1426 | else |
1427 | write_enn (own_buf); | |
1428 | free (mem_buf); | |
1429 | if (putpkt (own_buf) < 0) | |
1430 | return -1; | |
1431 | len = getpkt (own_buf); | |
1432 | if (len < 0) | |
1433 | return -1; | |
1434 | } | |
1b3f6016 | 1435 | |
2f2893d9 DJ |
1436 | if (strncmp (own_buf, "qSymbol:", strlen ("qSymbol:")) != 0) |
1437 | { | |
2bbe3cc1 | 1438 | warning ("Malformed response to qSymbol, ignoring: %s\n", own_buf); |
2f2893d9 DJ |
1439 | return -1; |
1440 | } | |
1441 | ||
1442 | p = own_buf + strlen ("qSymbol:"); | |
1443 | q = p; | |
1444 | while (*q && *q != ':') | |
1445 | q++; | |
1446 | ||
1447 | /* Make sure we found a value for the symbol. */ | |
1448 | if (p == q || *q == '\0') | |
1449 | return 0; | |
1450 | ||
1451 | decode_address (addrp, p, q - p); | |
fd500816 DJ |
1452 | |
1453 | /* Save the symbol in our cache. */ | |
bca929d3 DE |
1454 | sym = xmalloc (sizeof (*sym)); |
1455 | sym->name = xstrdup (name); | |
fd500816 | 1456 | sym->addr = *addrp; |
95954743 PA |
1457 | sym->next = proc->symbol_cache; |
1458 | proc->symbol_cache = sym; | |
fd500816 | 1459 | |
2f2893d9 DJ |
1460 | return 1; |
1461 | } | |
c74d0ad8 | 1462 | |
fa593d66 PA |
1463 | /* Relocate an instruction to execute at a different address. OLDLOC |
1464 | is the address in the inferior memory where the instruction to | |
1465 | relocate is currently at. On input, TO points to the destination | |
1466 | where we want the instruction to be copied (and possibly adjusted) | |
1467 | to. On output, it points to one past the end of the resulting | |
1468 | instruction(s). The effect of executing the instruction at TO | |
86a30030 | 1469 | shall be the same as if executing it at OLDLOC. For example, call |
fa593d66 PA |
1470 | instructions that implicitly push the return address on the stack |
1471 | should be adjusted to return to the instruction after OLDLOC; | |
1472 | relative branches, and other PC-relative instructions need the | |
1473 | offset adjusted; etc. Returns 0 on success, -1 on failure. */ | |
1474 | ||
1475 | int | |
1476 | relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc) | |
1477 | { | |
1478 | char own_buf[266]; | |
1479 | int len; | |
1480 | ULONGEST written = 0; | |
1481 | ||
1482 | /* Send the request. */ | |
1483 | strcpy (own_buf, "qRelocInsn:"); | |
1484 | sprintf (own_buf, "qRelocInsn:%s;%s", paddress (oldloc), | |
1485 | paddress (*to)); | |
1486 | if (putpkt (own_buf) < 0) | |
1487 | return -1; | |
1488 | ||
1489 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
1490 | len = getpkt (own_buf); | |
1491 | if (len < 0) | |
1492 | return -1; | |
1493 | ||
1494 | /* We ought to handle pretty much any packet at this point while we | |
1495 | wait for the qRelocInsn "response". That requires re-entering | |
1496 | the main loop. For now, this is an adequate approximation; allow | |
1497 | GDB to access memory. */ | |
1498 | while (own_buf[0] == 'm' || own_buf[0] == 'M' || own_buf[0] == 'X') | |
1499 | { | |
1500 | CORE_ADDR mem_addr; | |
1501 | unsigned char *mem_buf = NULL; | |
1502 | unsigned int mem_len; | |
1503 | ||
1504 | if (own_buf[0] == 'm') | |
1505 | { | |
1506 | decode_m_packet (&own_buf[1], &mem_addr, &mem_len); | |
1507 | mem_buf = xmalloc (mem_len); | |
1508 | if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0) | |
e9371aff | 1509 | bin2hex (mem_buf, own_buf, mem_len); |
fa593d66 PA |
1510 | else |
1511 | write_enn (own_buf); | |
1512 | } | |
1513 | else if (own_buf[0] == 'X') | |
1514 | { | |
1515 | if (decode_X_packet (&own_buf[1], len - 1, &mem_addr, | |
1516 | &mem_len, &mem_buf) < 0 | |
1517 | || write_inferior_memory (mem_addr, mem_buf, mem_len) != 0) | |
1518 | write_enn (own_buf); | |
1519 | else | |
1520 | write_ok (own_buf); | |
1521 | } | |
1522 | else | |
1523 | { | |
1524 | decode_M_packet (&own_buf[1], &mem_addr, &mem_len, &mem_buf); | |
1525 | if (write_inferior_memory (mem_addr, mem_buf, mem_len) == 0) | |
1526 | write_ok (own_buf); | |
1527 | else | |
1528 | write_enn (own_buf); | |
1529 | } | |
1530 | free (mem_buf); | |
1531 | if (putpkt (own_buf) < 0) | |
1532 | return -1; | |
1533 | len = getpkt (own_buf); | |
1534 | if (len < 0) | |
1535 | return -1; | |
1536 | } | |
1537 | ||
1538 | if (own_buf[0] == 'E') | |
1539 | { | |
1540 | warning ("An error occurred while relocating an instruction: %s\n", | |
1541 | own_buf); | |
1542 | return -1; | |
1543 | } | |
1544 | ||
1545 | if (strncmp (own_buf, "qRelocInsn:", strlen ("qRelocInsn:")) != 0) | |
1546 | { | |
1547 | warning ("Malformed response to qRelocInsn, ignoring: %s\n", | |
1548 | own_buf); | |
1549 | return -1; | |
1550 | } | |
1551 | ||
1552 | unpack_varlen_hex (own_buf + strlen ("qRelocInsn:"), &written); | |
1553 | ||
1554 | *to += written; | |
1555 | return 0; | |
1556 | } | |
1557 | ||
c74d0ad8 | 1558 | void |
bce7165d | 1559 | monitor_output (const char *msg) |
c74d0ad8 | 1560 | { |
0a822afb TT |
1561 | int len = strlen (msg); |
1562 | char *buf = xmalloc (len * 2 + 2); | |
c74d0ad8 DJ |
1563 | |
1564 | buf[0] = 'O'; | |
971dc0b8 | 1565 | bin2hex ((const gdb_byte *) msg, buf + 1, len); |
c74d0ad8 DJ |
1566 | |
1567 | putpkt (buf); | |
1568 | free (buf); | |
1569 | } | |
255e7678 | 1570 | |
0fb4aa4b | 1571 | #endif |