Commit | Line | Data |
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c906108c | 1 | /* Remote utility routines for the remote server for GDB. |
32d0add0 | 2 | Copyright (C) 1986-2015 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" |
fafcc06a | 26 | #include <ctype.h> |
b80864fb | 27 | #if HAVE_SYS_IOCTL_H |
c906108c | 28 | #include <sys/ioctl.h> |
b80864fb | 29 | #endif |
68070c10 | 30 | #if HAVE_SYS_FILE_H |
c906108c | 31 | #include <sys/file.h> |
68070c10 | 32 | #endif |
9eb1356e PA |
33 | #if HAVE_NETINET_IN_H |
34 | #include <netinet/in.h> | |
35 | #endif | |
36 | #if HAVE_SYS_SOCKET_H | |
37 | #include <sys/socket.h> | |
38 | #endif | |
b80864fb | 39 | #if HAVE_NETDB_H |
c906108c | 40 | #include <netdb.h> |
b80864fb DJ |
41 | #endif |
42 | #if HAVE_NETINET_TCP_H | |
c906108c | 43 | #include <netinet/tcp.h> |
b80864fb DJ |
44 | #endif |
45 | #if HAVE_SYS_IOCTL_H | |
c906108c | 46 | #include <sys/ioctl.h> |
b80864fb | 47 | #endif |
68070c10 | 48 | #if HAVE_SIGNAL_H |
c906108c | 49 | #include <signal.h> |
68070c10 PA |
50 | #endif |
51 | #if HAVE_FCNTL_H | |
c906108c | 52 | #include <fcntl.h> |
68070c10 | 53 | #endif |
438e1e42 | 54 | #include "gdb_sys_time.h" |
cf30a8e1 | 55 | #include <unistd.h> |
b80864fb | 56 | #if HAVE_ARPA_INET_H |
0729219d | 57 | #include <arpa/inet.h> |
b80864fb | 58 | #endif |
53ce3c39 | 59 | #include <sys/stat.h> |
9eb1356e PA |
60 | |
61 | #if USE_WIN32API | |
62 | #include <winsock2.h> | |
63 | #endif | |
c906108c | 64 | |
ac8c974e AR |
65 | #if __QNX__ |
66 | #include <sys/iomgr.h> | |
67 | #endif /* __QNX__ */ | |
68 | ||
f450004a DJ |
69 | #ifndef HAVE_SOCKLEN_T |
70 | typedef int socklen_t; | |
71 | #endif | |
72 | ||
0fb4aa4b PA |
73 | #ifndef IN_PROCESS_AGENT |
74 | ||
7390519e PA |
75 | #if USE_WIN32API |
76 | # define INVALID_DESCRIPTOR INVALID_SOCKET | |
77 | #else | |
78 | # define INVALID_DESCRIPTOR -1 | |
79 | #endif | |
80 | ||
24b066ba DE |
81 | /* Extra value for readchar_callback. */ |
82 | enum { | |
83 | /* The callback is currently not scheduled. */ | |
84 | NOT_SCHEDULED = -1 | |
85 | }; | |
86 | ||
87 | /* Status of the readchar callback. | |
88 | Either NOT_SCHEDULED or the callback id. */ | |
89 | static int readchar_callback = NOT_SCHEDULED; | |
90 | ||
bc3b5632 | 91 | static int readchar (void); |
24b066ba DE |
92 | static void reset_readchar (void); |
93 | static void reschedule (void); | |
bc3b5632 | 94 | |
fd500816 DJ |
95 | /* A cache entry for a successfully looked-up symbol. */ |
96 | struct sym_cache | |
97 | { | |
95954743 | 98 | char *name; |
fd500816 DJ |
99 | CORE_ADDR addr; |
100 | struct sym_cache *next; | |
101 | }; | |
102 | ||
c906108c | 103 | int remote_debug = 0; |
03863182 | 104 | struct ui_file *gdb_stdlog; |
c906108c | 105 | |
e0f9f062 DE |
106 | static int remote_is_stdio = 0; |
107 | ||
ec48365d PA |
108 | static gdb_fildes_t remote_desc = INVALID_DESCRIPTOR; |
109 | static gdb_fildes_t listen_desc = INVALID_DESCRIPTOR; | |
c906108c | 110 | |
0d62e5e8 DJ |
111 | /* FIXME headerize? */ |
112 | extern int using_threads; | |
113 | extern int debug_threads; | |
114 | ||
a6f3e723 SL |
115 | /* If true, then GDB has requested noack mode. */ |
116 | int noack_mode = 0; | |
117 | /* If true, then we tell GDB to use noack mode by default. */ | |
118 | int transport_is_reliable = 0; | |
119 | ||
0f48aa01 | 120 | #ifdef USE_WIN32API |
68070c10 PA |
121 | # define read(fd, buf, len) recv (fd, (char *) buf, len, 0) |
122 | # define write(fd, buf, len) send (fd, (char *) buf, len, 0) | |
0f48aa01 DJ |
123 | #endif |
124 | ||
8336d594 PA |
125 | int |
126 | gdb_connected (void) | |
127 | { | |
128 | return remote_desc != INVALID_DESCRIPTOR; | |
129 | } | |
130 | ||
e0f9f062 DE |
131 | /* Return true if the remote connection is over stdio. */ |
132 | ||
133 | int | |
134 | remote_connection_is_stdio (void) | |
135 | { | |
136 | return remote_is_stdio; | |
137 | } | |
138 | ||
8336d594 PA |
139 | static void |
140 | enable_async_notification (int fd) | |
141 | { | |
142 | #if defined(F_SETFL) && defined (FASYNC) | |
143 | int save_fcntl_flags; | |
144 | ||
145 | save_fcntl_flags = fcntl (fd, F_GETFL, 0); | |
146 | fcntl (fd, F_SETFL, save_fcntl_flags | FASYNC); | |
147 | #if defined (F_SETOWN) | |
148 | fcntl (fd, F_SETOWN, getpid ()); | |
149 | #endif | |
150 | #endif | |
151 | } | |
152 | ||
153 | static int | |
154 | handle_accept_event (int err, gdb_client_data client_data) | |
155 | { | |
9eb1356e | 156 | struct sockaddr_in sockaddr; |
8336d594 PA |
157 | socklen_t tmp; |
158 | ||
159 | if (debug_threads) | |
87ce2a04 | 160 | debug_printf ("handling possible accept event\n"); |
8336d594 | 161 | |
9eb1356e PA |
162 | tmp = sizeof (sockaddr); |
163 | remote_desc = accept (listen_desc, (struct sockaddr *) &sockaddr, &tmp); | |
8336d594 PA |
164 | if (remote_desc == -1) |
165 | perror_with_name ("Accept failed"); | |
166 | ||
167 | /* Enable TCP keep alive process. */ | |
168 | tmp = 1; | |
169 | setsockopt (remote_desc, SOL_SOCKET, SO_KEEPALIVE, | |
170 | (char *) &tmp, sizeof (tmp)); | |
171 | ||
172 | /* Tell TCP not to delay small packets. This greatly speeds up | |
173 | interactive response. */ | |
174 | tmp = 1; | |
175 | setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY, | |
176 | (char *) &tmp, sizeof (tmp)); | |
177 | ||
178 | #ifndef USE_WIN32API | |
8336d594 PA |
179 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply |
180 | exits when the remote side dies. */ | |
03f2bd59 JK |
181 | #endif |
182 | ||
183 | if (run_once) | |
184 | { | |
185 | #ifndef USE_WIN32API | |
186 | close (listen_desc); /* No longer need this */ | |
8336d594 | 187 | #else |
03f2bd59 | 188 | closesocket (listen_desc); /* No longer need this */ |
8336d594 | 189 | #endif |
03f2bd59 | 190 | } |
8336d594 | 191 | |
03f2bd59 JK |
192 | /* Even if !RUN_ONCE no longer notice new connections. Still keep the |
193 | descriptor open for add_file_handler to wait for a new connection. */ | |
8336d594 PA |
194 | delete_file_handler (listen_desc); |
195 | ||
196 | /* Convert IP address to string. */ | |
197 | fprintf (stderr, "Remote debugging from host %s\n", | |
9eb1356e | 198 | inet_ntoa (sockaddr.sin_addr)); |
8336d594 PA |
199 | |
200 | enable_async_notification (remote_desc); | |
201 | ||
202 | /* Register the event loop handler. */ | |
203 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
204 | ||
205 | /* We have a new GDB connection now. If we were disconnected | |
206 | tracing, there's a window where the target could report a stop | |
207 | event to the event loop, and since we have a connection now, we'd | |
208 | try to send vStopped notifications to GDB. But, don't do that | |
209 | until GDB as selected all-stop/non-stop, and has queried the | |
210 | threads' status ('?'). */ | |
211 | target_async (0); | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
03f2bd59 JK |
216 | /* Prepare for a later connection to a remote debugger. |
217 | NAME is the filename used for communication. */ | |
218 | ||
219 | void | |
220 | remote_prepare (char *name) | |
221 | { | |
222 | char *port_str; | |
223 | #ifdef USE_WIN32API | |
224 | static int winsock_initialized; | |
225 | #endif | |
226 | int port; | |
9eb1356e | 227 | struct sockaddr_in sockaddr; |
03f2bd59 JK |
228 | socklen_t tmp; |
229 | char *port_end; | |
230 | ||
e0f9f062 DE |
231 | remote_is_stdio = 0; |
232 | if (strcmp (name, STDIO_CONNECTION_NAME) == 0) | |
233 | { | |
234 | /* We need to record fact that we're using stdio sooner than the | |
235 | call to remote_open so start_inferior knows the connection is | |
236 | via stdio. */ | |
237 | remote_is_stdio = 1; | |
238 | transport_is_reliable = 1; | |
239 | return; | |
240 | } | |
241 | ||
03f2bd59 JK |
242 | port_str = strchr (name, ':'); |
243 | if (port_str == NULL) | |
244 | { | |
245 | transport_is_reliable = 0; | |
246 | return; | |
247 | } | |
248 | ||
249 | port = strtoul (port_str + 1, &port_end, 10); | |
250 | if (port_str[1] == '\0' || *port_end != '\0') | |
50278d59 | 251 | error ("Bad port argument: %s", name); |
03f2bd59 JK |
252 | |
253 | #ifdef USE_WIN32API | |
254 | if (!winsock_initialized) | |
255 | { | |
256 | WSADATA wsad; | |
257 | ||
258 | WSAStartup (MAKEWORD (1, 0), &wsad); | |
259 | winsock_initialized = 1; | |
260 | } | |
261 | #endif | |
262 | ||
263 | listen_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); | |
264 | if (listen_desc == -1) | |
265 | perror_with_name ("Can't open socket"); | |
266 | ||
267 | /* Allow rapid reuse of this port. */ | |
268 | tmp = 1; | |
269 | setsockopt (listen_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, | |
270 | sizeof (tmp)); | |
271 | ||
9eb1356e PA |
272 | sockaddr.sin_family = PF_INET; |
273 | sockaddr.sin_port = htons (port); | |
274 | sockaddr.sin_addr.s_addr = INADDR_ANY; | |
03f2bd59 | 275 | |
9eb1356e | 276 | if (bind (listen_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
03f2bd59 JK |
277 | || listen (listen_desc, 1)) |
278 | perror_with_name ("Can't bind address"); | |
279 | ||
280 | transport_is_reliable = 1; | |
281 | } | |
282 | ||
c906108c SS |
283 | /* Open a connection to a remote debugger. |
284 | NAME is the filename used for communication. */ | |
285 | ||
286 | void | |
fba45db2 | 287 | remote_open (char *name) |
c906108c | 288 | { |
8264bb58 DJ |
289 | char *port_str; |
290 | ||
291 | port_str = strchr (name, ':'); | |
e0f9f062 | 292 | #ifdef USE_WIN32API |
8264bb58 | 293 | if (port_str == NULL) |
e0f9f062 DE |
294 | error ("Only <host>:<port> is supported on this platform."); |
295 | #endif | |
296 | ||
297 | if (strcmp (name, STDIO_CONNECTION_NAME) == 0) | |
298 | { | |
299 | fprintf (stderr, "Remote debugging using stdio\n"); | |
300 | ||
301 | /* Use stdin as the handle of the connection. | |
302 | We only select on reads, for example. */ | |
303 | remote_desc = fileno (stdin); | |
304 | ||
305 | enable_async_notification (remote_desc); | |
306 | ||
307 | /* Register the event loop handler. */ | |
308 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
309 | } | |
310 | #ifndef USE_WIN32API | |
311 | else if (port_str == NULL) | |
c906108c | 312 | { |
8264bb58 DJ |
313 | struct stat statbuf; |
314 | ||
315 | if (stat (name, &statbuf) == 0 | |
316 | && (S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode))) | |
317 | remote_desc = open (name, O_RDWR); | |
318 | else | |
319 | { | |
320 | errno = EINVAL; | |
321 | remote_desc = -1; | |
322 | } | |
323 | ||
c906108c SS |
324 | if (remote_desc < 0) |
325 | perror_with_name ("Could not open remote device"); | |
326 | ||
327 | #ifdef HAVE_TERMIOS | |
328 | { | |
329 | struct termios termios; | |
c5aa993b | 330 | tcgetattr (remote_desc, &termios); |
c906108c SS |
331 | |
332 | termios.c_iflag = 0; | |
333 | termios.c_oflag = 0; | |
334 | termios.c_lflag = 0; | |
c5aa993b | 335 | termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 336 | termios.c_cflag |= CLOCAL | CS8; |
d0608e50 | 337 | termios.c_cc[VMIN] = 1; |
c906108c SS |
338 | termios.c_cc[VTIME] = 0; |
339 | ||
c5aa993b | 340 | tcsetattr (remote_desc, TCSANOW, &termios); |
c906108c SS |
341 | } |
342 | #endif | |
343 | ||
344 | #ifdef HAVE_TERMIO | |
345 | { | |
346 | struct termio termio; | |
347 | ioctl (remote_desc, TCGETA, &termio); | |
348 | ||
349 | termio.c_iflag = 0; | |
350 | termio.c_oflag = 0; | |
351 | termio.c_lflag = 0; | |
c5aa993b | 352 | termio.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 353 | termio.c_cflag |= CLOCAL | CS8; |
d0608e50 | 354 | termio.c_cc[VMIN] = 1; |
c906108c SS |
355 | termio.c_cc[VTIME] = 0; |
356 | ||
357 | ioctl (remote_desc, TCSETA, &termio); | |
358 | } | |
359 | #endif | |
360 | ||
361 | #ifdef HAVE_SGTTY | |
362 | { | |
363 | struct sgttyb sg; | |
364 | ||
365 | ioctl (remote_desc, TIOCGETP, &sg); | |
366 | sg.sg_flags = RAW; | |
367 | ioctl (remote_desc, TIOCSETP, &sg); | |
368 | } | |
369 | #endif | |
370 | ||
e641a1ca | 371 | fprintf (stderr, "Remote debugging using %s\n", name); |
a6f3e723 | 372 | |
8336d594 PA |
373 | enable_async_notification (remote_desc); |
374 | ||
375 | /* Register the event loop handler. */ | |
376 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
c906108c | 377 | } |
e0f9f062 | 378 | #endif /* USE_WIN32API */ |
c906108c SS |
379 | else |
380 | { | |
c906108c | 381 | int port; |
03f2bd59 | 382 | socklen_t len; |
c906108c | 383 | struct sockaddr_in sockaddr; |
c906108c | 384 | |
03f2bd59 JK |
385 | len = sizeof (sockaddr); |
386 | if (getsockname (listen_desc, | |
387 | (struct sockaddr *) &sockaddr, &len) < 0 | |
388 | || len < sizeof (sockaddr)) | |
389 | perror_with_name ("Can't determine port"); | |
390 | port = ntohs (sockaddr.sin_port); | |
6f8486da | 391 | |
6910d122 | 392 | fprintf (stderr, "Listening on port %d\n", port); |
b80864fb | 393 | fflush (stderr); |
6910d122 | 394 | |
8336d594 PA |
395 | /* Register the event loop handler. */ |
396 | add_file_handler (listen_desc, handle_accept_event, NULL); | |
c906108c | 397 | } |
c906108c SS |
398 | } |
399 | ||
400 | void | |
fba45db2 | 401 | remote_close (void) |
c906108c | 402 | { |
bd99dc85 PA |
403 | delete_file_handler (remote_desc); |
404 | ||
b80864fb DJ |
405 | #ifdef USE_WIN32API |
406 | closesocket (remote_desc); | |
407 | #else | |
e0f9f062 DE |
408 | if (! remote_connection_is_stdio ()) |
409 | close (remote_desc); | |
b80864fb | 410 | #endif |
8336d594 | 411 | remote_desc = INVALID_DESCRIPTOR; |
24b066ba DE |
412 | |
413 | reset_readchar (); | |
c906108c SS |
414 | } |
415 | ||
0fb4aa4b PA |
416 | #endif |
417 | ||
0fb4aa4b PA |
418 | #ifndef IN_PROCESS_AGENT |
419 | ||
dae5f5cf | 420 | void |
2f2893d9 DJ |
421 | decode_address (CORE_ADDR *addrp, const char *start, int len) |
422 | { | |
423 | CORE_ADDR addr; | |
424 | char ch; | |
425 | int i; | |
426 | ||
427 | addr = 0; | |
428 | for (i = 0; i < len; i++) | |
429 | { | |
430 | ch = start[i]; | |
431 | addr = addr << 4; | |
432 | addr = addr | (fromhex (ch) & 0x0f); | |
433 | } | |
434 | *addrp = addr; | |
435 | } | |
436 | ||
89be2091 DJ |
437 | const char * |
438 | decode_address_to_semicolon (CORE_ADDR *addrp, const char *start) | |
439 | { | |
440 | const char *end; | |
441 | ||
442 | end = start; | |
443 | while (*end != '\0' && *end != ';') | |
444 | end++; | |
445 | ||
446 | decode_address (addrp, start, end - start); | |
447 | ||
448 | if (*end == ';') | |
449 | end++; | |
450 | return end; | |
451 | } | |
452 | ||
0fb4aa4b PA |
453 | #endif |
454 | ||
0fb4aa4b PA |
455 | #ifndef IN_PROCESS_AGENT |
456 | ||
5ffff7c1 DJ |
457 | /* Look for a sequence of characters which can be run-length encoded. |
458 | If there are any, update *CSUM and *P. Otherwise, output the | |
459 | single character. Return the number of characters consumed. */ | |
460 | ||
461 | static int | |
462 | try_rle (char *buf, int remaining, unsigned char *csum, char **p) | |
463 | { | |
464 | int n; | |
465 | ||
466 | /* Always output the character. */ | |
467 | *csum += buf[0]; | |
468 | *(*p)++ = buf[0]; | |
469 | ||
470 | /* Don't go past '~'. */ | |
471 | if (remaining > 97) | |
472 | remaining = 97; | |
473 | ||
474 | for (n = 1; n < remaining; n++) | |
475 | if (buf[n] != buf[0]) | |
476 | break; | |
477 | ||
478 | /* N is the index of the first character not the same as buf[0]. | |
479 | buf[0] is counted twice, so by decrementing N, we get the number | |
480 | of characters the RLE sequence will replace. */ | |
481 | n--; | |
482 | ||
483 | if (n < 3) | |
484 | return 1; | |
485 | ||
486 | /* Skip the frame characters. The manual says to skip '+' and '-' | |
487 | also, but there's no reason to. Unfortunately these two unusable | |
488 | characters double the encoded length of a four byte zero | |
489 | value. */ | |
490 | while (n + 29 == '$' || n + 29 == '#') | |
491 | n--; | |
492 | ||
493 | *csum += '*'; | |
494 | *(*p)++ = '*'; | |
495 | *csum += n + 29; | |
496 | *(*p)++ = n + 29; | |
497 | ||
498 | return n + 1; | |
499 | } | |
500 | ||
0fb4aa4b PA |
501 | #endif |
502 | ||
0fb4aa4b PA |
503 | #ifndef IN_PROCESS_AGENT |
504 | ||
95954743 PA |
505 | /* Write a PTID to BUF. Returns BUF+CHARACTERS_WRITTEN. */ |
506 | ||
507 | char * | |
508 | write_ptid (char *buf, ptid_t ptid) | |
509 | { | |
510 | int pid, tid; | |
511 | ||
512 | if (multi_process) | |
513 | { | |
514 | pid = ptid_get_pid (ptid); | |
515 | if (pid < 0) | |
516 | buf += sprintf (buf, "p-%x.", -pid); | |
517 | else | |
518 | buf += sprintf (buf, "p%x.", pid); | |
519 | } | |
520 | tid = ptid_get_lwp (ptid); | |
521 | if (tid < 0) | |
522 | buf += sprintf (buf, "-%x", -tid); | |
523 | else | |
524 | buf += sprintf (buf, "%x", tid); | |
525 | ||
526 | return buf; | |
527 | } | |
528 | ||
529 | ULONGEST | |
530 | hex_or_minus_one (char *buf, char **obuf) | |
531 | { | |
532 | ULONGEST ret; | |
533 | ||
61012eef | 534 | if (startswith (buf, "-1")) |
95954743 PA |
535 | { |
536 | ret = (ULONGEST) -1; | |
537 | buf += 2; | |
538 | } | |
539 | else | |
540 | buf = unpack_varlen_hex (buf, &ret); | |
541 | ||
542 | if (obuf) | |
543 | *obuf = buf; | |
544 | ||
545 | return ret; | |
546 | } | |
547 | ||
548 | /* Extract a PTID from BUF. If non-null, OBUF is set to the to one | |
549 | passed the last parsed char. Returns null_ptid on error. */ | |
550 | ptid_t | |
551 | read_ptid (char *buf, char **obuf) | |
552 | { | |
553 | char *p = buf; | |
554 | char *pp; | |
555 | ULONGEST pid = 0, tid = 0; | |
556 | ||
557 | if (*p == 'p') | |
558 | { | |
559 | /* Multi-process ptid. */ | |
560 | pp = unpack_varlen_hex (p + 1, &pid); | |
561 | if (*pp != '.') | |
562 | error ("invalid remote ptid: %s\n", p); | |
563 | ||
564 | p = pp + 1; | |
565 | ||
566 | tid = hex_or_minus_one (p, &pp); | |
567 | ||
568 | if (obuf) | |
569 | *obuf = pp; | |
570 | return ptid_build (pid, tid, 0); | |
571 | } | |
572 | ||
573 | /* No multi-process. Just a tid. */ | |
574 | tid = hex_or_minus_one (p, &pp); | |
575 | ||
3d40fbb5 PA |
576 | /* Since GDB is not sending a process id (multi-process extensions |
577 | are off), then there's only one process. Default to the first in | |
578 | the list. */ | |
579 | pid = pid_of (get_first_process ()); | |
95954743 PA |
580 | |
581 | if (obuf) | |
582 | *obuf = pp; | |
583 | return ptid_build (pid, tid, 0); | |
584 | } | |
585 | ||
e0f9f062 DE |
586 | /* Write COUNT bytes in BUF to the client. |
587 | The result is the number of bytes written or -1 if error. | |
588 | This may return less than COUNT. */ | |
589 | ||
590 | static int | |
591 | write_prim (const void *buf, int count) | |
592 | { | |
593 | if (remote_connection_is_stdio ()) | |
594 | return write (fileno (stdout), buf, count); | |
595 | else | |
596 | return write (remote_desc, buf, count); | |
597 | } | |
598 | ||
599 | /* Read COUNT bytes from the client and store in BUF. | |
600 | The result is the number of bytes read or -1 if error. | |
601 | This may return less than COUNT. */ | |
602 | ||
603 | static int | |
604 | read_prim (void *buf, int count) | |
605 | { | |
606 | if (remote_connection_is_stdio ()) | |
607 | return read (fileno (stdin), buf, count); | |
608 | else | |
609 | return read (remote_desc, buf, count); | |
610 | } | |
611 | ||
c906108c | 612 | /* Send a packet to the remote machine, with error checking. |
01f9e8fa DJ |
613 | The data of the packet is in BUF, and the length of the |
614 | packet is in CNT. Returns >= 0 on success, -1 otherwise. */ | |
c906108c | 615 | |
bd99dc85 PA |
616 | static int |
617 | putpkt_binary_1 (char *buf, int cnt, int is_notif) | |
c906108c SS |
618 | { |
619 | int i; | |
620 | unsigned char csum = 0; | |
0a30fbc4 | 621 | char *buf2; |
c906108c | 622 | char *p; |
bc3b5632 | 623 | int cc; |
c906108c | 624 | |
e6edda56 | 625 | buf2 = xmalloc (strlen ("$") + cnt + strlen ("#nn") + 1); |
0a30fbc4 | 626 | |
c906108c SS |
627 | /* Copy the packet into buffer BUF2, encapsulating it |
628 | and giving it a checksum. */ | |
629 | ||
630 | p = buf2; | |
bd99dc85 PA |
631 | if (is_notif) |
632 | *p++ = '%'; | |
633 | else | |
634 | *p++ = '$'; | |
c906108c | 635 | |
5ffff7c1 DJ |
636 | for (i = 0; i < cnt;) |
637 | i += try_rle (buf + i, cnt - i, &csum, &p); | |
638 | ||
c906108c SS |
639 | *p++ = '#'; |
640 | *p++ = tohex ((csum >> 4) & 0xf); | |
641 | *p++ = tohex (csum & 0xf); | |
642 | ||
643 | *p = '\0'; | |
644 | ||
645 | /* Send it over and over until we get a positive ack. */ | |
646 | ||
647 | do | |
648 | { | |
e0f9f062 | 649 | if (write_prim (buf2, p - buf2) != p - buf2) |
c906108c SS |
650 | { |
651 | perror ("putpkt(write)"); | |
f88c79e6 | 652 | free (buf2); |
c906108c SS |
653 | return -1; |
654 | } | |
655 | ||
bd99dc85 | 656 | if (noack_mode || is_notif) |
a6f3e723 SL |
657 | { |
658 | /* Don't expect an ack then. */ | |
659 | if (remote_debug) | |
660 | { | |
bd99dc85 PA |
661 | if (is_notif) |
662 | fprintf (stderr, "putpkt (\"%s\"); [notif]\n", buf2); | |
663 | else | |
664 | fprintf (stderr, "putpkt (\"%s\"); [noack mode]\n", buf2); | |
a6f3e723 SL |
665 | fflush (stderr); |
666 | } | |
667 | break; | |
668 | } | |
669 | ||
c906108c | 670 | if (remote_debug) |
0d62e5e8 DJ |
671 | { |
672 | fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2); | |
673 | fflush (stderr); | |
674 | } | |
0d62e5e8 | 675 | |
bc3b5632 | 676 | cc = readchar (); |
c906108c | 677 | |
bc3b5632 DE |
678 | if (cc < 0) |
679 | { | |
0a30fbc4 | 680 | free (buf2); |
c906108c SS |
681 | return -1; |
682 | } | |
0d62e5e8 | 683 | |
bc3b5632 DE |
684 | if (remote_debug) |
685 | { | |
686 | fprintf (stderr, "[received '%c' (0x%x)]\n", cc, cc); | |
687 | fflush (stderr); | |
688 | } | |
689 | ||
0d62e5e8 | 690 | /* Check for an input interrupt while we're here. */ |
0bfdf32f | 691 | if (cc == '\003' && current_thread != NULL) |
ef57601b | 692 | (*the_target->request_interrupt) (); |
c906108c | 693 | } |
bc3b5632 | 694 | while (cc != '+'); |
c906108c | 695 | |
0a30fbc4 | 696 | free (buf2); |
c906108c SS |
697 | return 1; /* Success! */ |
698 | } | |
699 | ||
bd99dc85 PA |
700 | int |
701 | putpkt_binary (char *buf, int cnt) | |
702 | { | |
703 | return putpkt_binary_1 (buf, cnt, 0); | |
704 | } | |
705 | ||
01f9e8fa DJ |
706 | /* Send a packet to the remote machine, with error checking. The data |
707 | of the packet is in BUF, and the packet should be a NUL-terminated | |
708 | string. Returns >= 0 on success, -1 otherwise. */ | |
709 | ||
710 | int | |
711 | putpkt (char *buf) | |
712 | { | |
713 | return putpkt_binary (buf, strlen (buf)); | |
714 | } | |
715 | ||
bd99dc85 PA |
716 | int |
717 | putpkt_notif (char *buf) | |
718 | { | |
719 | return putpkt_binary_1 (buf, strlen (buf), 1); | |
720 | } | |
721 | ||
c906108c SS |
722 | /* Come here when we get an input interrupt from the remote side. This |
723 | interrupt should only be active while we are waiting for the child to do | |
bc3b5632 DE |
724 | something. Thus this assumes readchar:bufcnt is 0. |
725 | About the only thing that should come through is a ^C, which | |
ef57601b | 726 | will cause us to request child interruption. */ |
c906108c SS |
727 | |
728 | static void | |
0a30fbc4 | 729 | input_interrupt (int unused) |
c906108c | 730 | { |
cf30a8e1 C |
731 | fd_set readset; |
732 | struct timeval immediate = { 0, 0 }; | |
c906108c | 733 | |
cf30a8e1 C |
734 | /* Protect against spurious interrupts. This has been observed to |
735 | be a problem under NetBSD 1.4 and 1.5. */ | |
c906108c | 736 | |
cf30a8e1 C |
737 | FD_ZERO (&readset); |
738 | FD_SET (remote_desc, &readset); | |
739 | if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) | |
c906108c | 740 | { |
cf30a8e1 | 741 | int cc; |
fd500816 | 742 | char c = 0; |
7390519e | 743 | |
e0f9f062 | 744 | cc = read_prim (&c, 1); |
c906108c | 745 | |
fafcc06a | 746 | if (cc == 0) |
cf30a8e1 | 747 | { |
fafcc06a SDJ |
748 | fprintf (stderr, "client connection closed\n"); |
749 | return; | |
750 | } | |
f0db101d | 751 | else if (cc != 1 || c != '\003') |
fafcc06a SDJ |
752 | { |
753 | fprintf (stderr, "input_interrupt, count = %d c = %d ", cc, c); | |
754 | if (isprint (c)) | |
755 | fprintf (stderr, "('%c')\n", c); | |
756 | else | |
757 | fprintf (stderr, "('\\x%02x')\n", c & 0xff); | |
cf30a8e1 C |
758 | return; |
759 | } | |
7390519e | 760 | |
ef57601b | 761 | (*the_target->request_interrupt) (); |
cf30a8e1 | 762 | } |
c906108c | 763 | } |
7390519e PA |
764 | |
765 | /* Check if the remote side sent us an interrupt request (^C). */ | |
766 | void | |
767 | check_remote_input_interrupt_request (void) | |
768 | { | |
769 | /* This function may be called before establishing communications, | |
770 | therefore we need to validate the remote descriptor. */ | |
771 | ||
772 | if (remote_desc == INVALID_DESCRIPTOR) | |
773 | return; | |
774 | ||
775 | input_interrupt (0); | |
776 | } | |
b80864fb DJ |
777 | |
778 | /* Asynchronous I/O support. SIGIO must be enabled when waiting, in order to | |
779 | accept Control-C from the client, and must be disabled when talking to | |
780 | the client. */ | |
c906108c | 781 | |
a20d5e98 | 782 | static void |
62ea82f5 DJ |
783 | unblock_async_io (void) |
784 | { | |
b80864fb | 785 | #ifndef USE_WIN32API |
62ea82f5 | 786 | sigset_t sigio_set; |
a20d5e98 | 787 | |
62ea82f5 DJ |
788 | sigemptyset (&sigio_set); |
789 | sigaddset (&sigio_set, SIGIO); | |
790 | sigprocmask (SIG_UNBLOCK, &sigio_set, NULL); | |
b80864fb | 791 | #endif |
62ea82f5 DJ |
792 | } |
793 | ||
ac8c974e AR |
794 | #ifdef __QNX__ |
795 | static void | |
796 | nto_comctrl (int enable) | |
797 | { | |
798 | struct sigevent event; | |
799 | ||
800 | if (enable) | |
801 | { | |
802 | event.sigev_notify = SIGEV_SIGNAL_THREAD; | |
803 | event.sigev_signo = SIGIO; | |
804 | event.sigev_code = 0; | |
805 | event.sigev_value.sival_ptr = NULL; | |
806 | event.sigev_priority = -1; | |
807 | ionotify (remote_desc, _NOTIFY_ACTION_POLLARM, _NOTIFY_COND_INPUT, | |
808 | &event); | |
809 | } | |
810 | else | |
811 | ionotify (remote_desc, _NOTIFY_ACTION_POLL, _NOTIFY_COND_INPUT, NULL); | |
812 | } | |
813 | #endif /* __QNX__ */ | |
814 | ||
815 | ||
fd500816 DJ |
816 | /* Current state of asynchronous I/O. */ |
817 | static int async_io_enabled; | |
818 | ||
819 | /* Enable asynchronous I/O. */ | |
c906108c | 820 | void |
fba45db2 | 821 | enable_async_io (void) |
c906108c | 822 | { |
fd500816 DJ |
823 | if (async_io_enabled) |
824 | return; | |
825 | ||
b80864fb | 826 | #ifndef USE_WIN32API |
c906108c | 827 | signal (SIGIO, input_interrupt); |
b80864fb | 828 | #endif |
fd500816 | 829 | async_io_enabled = 1; |
ac8c974e AR |
830 | #ifdef __QNX__ |
831 | nto_comctrl (1); | |
832 | #endif /* __QNX__ */ | |
c906108c SS |
833 | } |
834 | ||
fd500816 | 835 | /* Disable asynchronous I/O. */ |
c906108c | 836 | void |
fba45db2 | 837 | disable_async_io (void) |
c906108c | 838 | { |
fd500816 DJ |
839 | if (!async_io_enabled) |
840 | return; | |
841 | ||
b80864fb | 842 | #ifndef USE_WIN32API |
c906108c | 843 | signal (SIGIO, SIG_IGN); |
b80864fb | 844 | #endif |
fd500816 | 845 | async_io_enabled = 0; |
ac8c974e AR |
846 | #ifdef __QNX__ |
847 | nto_comctrl (0); | |
848 | #endif /* __QNX__ */ | |
849 | ||
c906108c SS |
850 | } |
851 | ||
a20d5e98 DJ |
852 | void |
853 | initialize_async_io (void) | |
854 | { | |
855 | /* Make sure that async I/O starts disabled. */ | |
856 | async_io_enabled = 1; | |
857 | disable_async_io (); | |
858 | ||
859 | /* Make sure the signal is unblocked. */ | |
860 | unblock_async_io (); | |
861 | } | |
862 | ||
24b066ba DE |
863 | /* Internal buffer used by readchar. |
864 | These are global to readchar because reschedule_remote needs to be | |
865 | able to tell whether the buffer is empty. */ | |
866 | ||
867 | static unsigned char readchar_buf[BUFSIZ]; | |
868 | static int readchar_bufcnt = 0; | |
869 | static unsigned char *readchar_bufp; | |
870 | ||
c906108c SS |
871 | /* Returns next char from remote GDB. -1 if error. */ |
872 | ||
873 | static int | |
fba45db2 | 874 | readchar (void) |
c906108c | 875 | { |
24b066ba | 876 | int ch; |
c906108c | 877 | |
24b066ba DE |
878 | if (readchar_bufcnt == 0) |
879 | { | |
e0f9f062 | 880 | readchar_bufcnt = read_prim (readchar_buf, sizeof (readchar_buf)); |
c906108c | 881 | |
24b066ba DE |
882 | if (readchar_bufcnt <= 0) |
883 | { | |
884 | if (readchar_bufcnt == 0) | |
885 | fprintf (stderr, "readchar: Got EOF\n"); | |
886 | else | |
887 | perror ("readchar"); | |
c906108c | 888 | |
24b066ba DE |
889 | return -1; |
890 | } | |
c906108c | 891 | |
24b066ba | 892 | readchar_bufp = readchar_buf; |
c906108c SS |
893 | } |
894 | ||
24b066ba DE |
895 | readchar_bufcnt--; |
896 | ch = *readchar_bufp++; | |
897 | reschedule (); | |
898 | return ch; | |
899 | } | |
900 | ||
901 | /* Reset the readchar state machine. */ | |
902 | ||
903 | static void | |
904 | reset_readchar (void) | |
905 | { | |
906 | readchar_bufcnt = 0; | |
907 | if (readchar_callback != NOT_SCHEDULED) | |
908 | { | |
909 | delete_callback_event (readchar_callback); | |
910 | readchar_callback = NOT_SCHEDULED; | |
911 | } | |
912 | } | |
913 | ||
914 | /* Process remaining data in readchar_buf. */ | |
915 | ||
916 | static int | |
917 | process_remaining (void *context) | |
918 | { | |
919 | int res; | |
920 | ||
921 | /* This is a one-shot event. */ | |
922 | readchar_callback = NOT_SCHEDULED; | |
923 | ||
924 | if (readchar_bufcnt > 0) | |
925 | res = handle_serial_event (0, NULL); | |
926 | else | |
927 | res = 0; | |
928 | ||
929 | return res; | |
930 | } | |
931 | ||
932 | /* If there is still data in the buffer, queue another event to process it, | |
933 | we can't sleep in select yet. */ | |
934 | ||
935 | static void | |
936 | reschedule (void) | |
937 | { | |
938 | if (readchar_bufcnt > 0 && readchar_callback == NOT_SCHEDULED) | |
939 | readchar_callback = append_callback_event (process_remaining, NULL); | |
c906108c SS |
940 | } |
941 | ||
942 | /* Read a packet from the remote machine, with error checking, | |
943 | and store it in BUF. Returns length of packet, or negative if error. */ | |
944 | ||
945 | int | |
fba45db2 | 946 | getpkt (char *buf) |
c906108c SS |
947 | { |
948 | char *bp; | |
949 | unsigned char csum, c1, c2; | |
950 | int c; | |
951 | ||
952 | while (1) | |
953 | { | |
954 | csum = 0; | |
955 | ||
956 | while (1) | |
957 | { | |
958 | c = readchar (); | |
959 | if (c == '$') | |
960 | break; | |
961 | if (remote_debug) | |
0d62e5e8 DJ |
962 | { |
963 | fprintf (stderr, "[getpkt: discarding char '%c']\n", c); | |
964 | fflush (stderr); | |
965 | } | |
966 | ||
c906108c SS |
967 | if (c < 0) |
968 | return -1; | |
969 | } | |
970 | ||
971 | bp = buf; | |
972 | while (1) | |
973 | { | |
974 | c = readchar (); | |
975 | if (c < 0) | |
976 | return -1; | |
977 | if (c == '#') | |
978 | break; | |
979 | *bp++ = c; | |
980 | csum += c; | |
981 | } | |
982 | *bp = 0; | |
983 | ||
984 | c1 = fromhex (readchar ()); | |
985 | c2 = fromhex (readchar ()); | |
c5aa993b | 986 | |
c906108c SS |
987 | if (csum == (c1 << 4) + c2) |
988 | break; | |
989 | ||
a6f3e723 SL |
990 | if (noack_mode) |
991 | { | |
493e2a69 MS |
992 | fprintf (stderr, |
993 | "Bad checksum, sentsum=0x%x, csum=0x%x, " | |
994 | "buf=%s [no-ack-mode, Bad medium?]\n", | |
a6f3e723 SL |
995 | (c1 << 4) + c2, csum, buf); |
996 | /* Not much we can do, GDB wasn't expecting an ack/nac. */ | |
997 | break; | |
998 | } | |
999 | ||
c906108c SS |
1000 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", |
1001 | (c1 << 4) + c2, csum, buf); | |
e0f9f062 | 1002 | if (write_prim ("-", 1) != 1) |
e581f2b4 | 1003 | return -1; |
c906108c SS |
1004 | } |
1005 | ||
a6f3e723 | 1006 | if (!noack_mode) |
0d62e5e8 | 1007 | { |
a6f3e723 SL |
1008 | if (remote_debug) |
1009 | { | |
1010 | fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf); | |
1011 | fflush (stderr); | |
1012 | } | |
c906108c | 1013 | |
e0f9f062 | 1014 | if (write_prim ("+", 1) != 1) |
e581f2b4 | 1015 | return -1; |
c906108c | 1016 | |
a6f3e723 SL |
1017 | if (remote_debug) |
1018 | { | |
1019 | fprintf (stderr, "[sent ack]\n"); | |
1020 | fflush (stderr); | |
1021 | } | |
0d62e5e8 | 1022 | } |
86b1f9c5 PM |
1023 | else |
1024 | { | |
1025 | if (remote_debug) | |
1026 | { | |
1027 | fprintf (stderr, "getpkt (\"%s\"); [no ack sent] \n", buf); | |
1028 | fflush (stderr); | |
1029 | } | |
1030 | } | |
0d62e5e8 | 1031 | |
c906108c SS |
1032 | return bp - buf; |
1033 | } | |
1034 | ||
1035 | void | |
fba45db2 | 1036 | write_ok (char *buf) |
c906108c SS |
1037 | { |
1038 | buf[0] = 'O'; | |
1039 | buf[1] = 'K'; | |
1040 | buf[2] = '\0'; | |
1041 | } | |
1042 | ||
1043 | void | |
fba45db2 | 1044 | write_enn (char *buf) |
c906108c | 1045 | { |
c89dc5d4 | 1046 | /* Some day, we should define the meanings of the error codes... */ |
c906108c | 1047 | buf[0] = 'E'; |
c89dc5d4 DJ |
1048 | buf[1] = '0'; |
1049 | buf[2] = '1'; | |
c906108c SS |
1050 | buf[3] = '\0'; |
1051 | } | |
1052 | ||
0fb4aa4b PA |
1053 | #endif |
1054 | ||
0fb4aa4b | 1055 | #ifndef IN_PROCESS_AGENT |
c906108c | 1056 | |
c906108c | 1057 | static char * |
442ea881 | 1058 | outreg (struct regcache *regcache, int regno, char *buf) |
c906108c | 1059 | { |
5c44784c JM |
1060 | if ((regno >> 12) != 0) |
1061 | *buf++ = tohex ((regno >> 12) & 0xf); | |
1062 | if ((regno >> 8) != 0) | |
1063 | *buf++ = tohex ((regno >> 8) & 0xf); | |
1064 | *buf++ = tohex ((regno >> 4) & 0xf); | |
c906108c SS |
1065 | *buf++ = tohex (regno & 0xf); |
1066 | *buf++ = ':'; | |
442ea881 | 1067 | collect_register_as_string (regcache, regno, buf); |
3aee8918 | 1068 | buf += 2 * register_size (regcache->tdesc, regno); |
c906108c SS |
1069 | *buf++ = ';'; |
1070 | ||
1071 | return buf; | |
1072 | } | |
1073 | ||
0d62e5e8 DJ |
1074 | void |
1075 | new_thread_notify (int id) | |
1076 | { | |
1077 | char own_buf[256]; | |
1078 | ||
1079 | /* The `n' response is not yet part of the remote protocol. Do nothing. */ | |
1080 | if (1) | |
1081 | return; | |
1082 | ||
1083 | if (server_waiting == 0) | |
1084 | return; | |
1085 | ||
1086 | sprintf (own_buf, "n%x", id); | |
1087 | disable_async_io (); | |
1088 | putpkt (own_buf); | |
1089 | enable_async_io (); | |
1090 | } | |
1091 | ||
1092 | void | |
1093 | dead_thread_notify (int id) | |
1094 | { | |
1095 | char own_buf[256]; | |
1096 | ||
1097 | /* The `x' response is not yet part of the remote protocol. Do nothing. */ | |
1098 | if (1) | |
1099 | return; | |
1100 | ||
1101 | sprintf (own_buf, "x%x", id); | |
1102 | disable_async_io (); | |
1103 | putpkt (own_buf); | |
1104 | enable_async_io (); | |
1105 | } | |
1106 | ||
c906108c | 1107 | void |
95954743 | 1108 | prepare_resume_reply (char *buf, ptid_t ptid, |
5b1c542e | 1109 | struct target_waitstatus *status) |
c906108c | 1110 | { |
5b1c542e | 1111 | if (debug_threads) |
87ce2a04 DE |
1112 | debug_printf ("Writing resume reply for %s:%d\n", |
1113 | target_pid_to_str (ptid), status->kind); | |
c906108c | 1114 | |
5b1c542e | 1115 | switch (status->kind) |
c906108c | 1116 | { |
5b1c542e | 1117 | case TARGET_WAITKIND_STOPPED: |
de0d863e | 1118 | case TARGET_WAITKIND_FORKED: |
c269dbdb | 1119 | case TARGET_WAITKIND_VFORKED: |
8228463c | 1120 | case TARGET_WAITKIND_VFORK_DONE: |
94585166 | 1121 | case TARGET_WAITKIND_EXECD: |
5b1c542e | 1122 | { |
0bfdf32f | 1123 | struct thread_info *saved_thread; |
5b1c542e | 1124 | const char **regp; |
442ea881 | 1125 | struct regcache *regcache; |
e013ee27 | 1126 | |
c269dbdb DB |
1127 | if ((status->kind == TARGET_WAITKIND_FORKED && report_fork_events) |
1128 | || (status->kind == TARGET_WAITKIND_VFORKED && report_vfork_events)) | |
de0d863e DB |
1129 | { |
1130 | enum gdb_signal signal = GDB_SIGNAL_TRAP; | |
c269dbdb DB |
1131 | const char *event = (status->kind == TARGET_WAITKIND_FORKED |
1132 | ? "fork" : "vfork"); | |
de0d863e | 1133 | |
c269dbdb | 1134 | sprintf (buf, "T%02x%s:", signal, event); |
de0d863e DB |
1135 | buf += strlen (buf); |
1136 | buf = write_ptid (buf, status->value.related_pid); | |
1137 | strcat (buf, ";"); | |
1138 | } | |
8228463c PA |
1139 | else if (status->kind == TARGET_WAITKIND_VFORK_DONE && report_vfork_events) |
1140 | { | |
1141 | enum gdb_signal signal = GDB_SIGNAL_TRAP; | |
1142 | ||
1143 | sprintf (buf, "T%02xvforkdone:;", signal); | |
1144 | } | |
d57e0d50 | 1145 | else if (status->kind == TARGET_WAITKIND_EXECD && report_exec_events) |
94585166 DB |
1146 | { |
1147 | enum gdb_signal signal = GDB_SIGNAL_TRAP; | |
1148 | const char *event = "exec"; | |
1149 | char hexified_pathname[PATH_MAX * 2]; | |
1150 | ||
1151 | sprintf (buf, "T%02x%s:", signal, event); | |
1152 | buf += strlen (buf); | |
1153 | ||
1154 | /* Encode pathname to hexified format. */ | |
1155 | bin2hex ((const gdb_byte *) status->value.execd_pathname, | |
1156 | hexified_pathname, | |
1157 | strlen (status->value.execd_pathname)); | |
1158 | ||
1159 | sprintf (buf, "%s;", hexified_pathname); | |
1160 | xfree (status->value.execd_pathname); | |
1161 | status->value.execd_pathname = NULL; | |
1162 | buf += strlen (buf); | |
1163 | } | |
de0d863e DB |
1164 | else |
1165 | sprintf (buf, "T%02x", status->value.sig); | |
1166 | ||
5b1c542e | 1167 | buf += strlen (buf); |
e013ee27 | 1168 | |
0bfdf32f | 1169 | saved_thread = current_thread; |
e013ee27 | 1170 | |
0bfdf32f | 1171 | current_thread = find_thread_ptid (ptid); |
e013ee27 | 1172 | |
3aee8918 PA |
1173 | regp = current_target_desc ()->expedite_regs; |
1174 | ||
0bfdf32f | 1175 | regcache = get_thread_regcache (current_thread, 1); |
442ea881 | 1176 | |
5b1c542e PA |
1177 | if (the_target->stopped_by_watchpoint != NULL |
1178 | && (*the_target->stopped_by_watchpoint) ()) | |
1179 | { | |
1180 | CORE_ADDR addr; | |
1181 | int i; | |
c906108c | 1182 | |
5b1c542e PA |
1183 | strncpy (buf, "watch:", 6); |
1184 | buf += 6; | |
0d62e5e8 | 1185 | |
5b1c542e | 1186 | addr = (*the_target->stopped_data_address) (); |
255e7678 | 1187 | |
5b1c542e PA |
1188 | /* Convert each byte of the address into two hexadecimal |
1189 | chars. Note that we take sizeof (void *) instead of | |
1190 | sizeof (addr); this is to avoid sending a 64-bit | |
1191 | address to a 32-bit GDB. */ | |
1192 | for (i = sizeof (void *) * 2; i > 0; i--) | |
1193 | *buf++ = tohex ((addr >> (i - 1) * 4) & 0xf); | |
1194 | *buf++ = ';'; | |
1195 | } | |
1ec68e26 PA |
1196 | else if (swbreak_feature && target_stopped_by_sw_breakpoint ()) |
1197 | { | |
1198 | sprintf (buf, "swbreak:;"); | |
1199 | buf += strlen (buf); | |
1200 | } | |
1201 | else if (hwbreak_feature && target_stopped_by_hw_breakpoint ()) | |
1202 | { | |
1203 | sprintf (buf, "hwbreak:;"); | |
1204 | buf += strlen (buf); | |
1205 | } | |
5b1c542e PA |
1206 | |
1207 | while (*regp) | |
1208 | { | |
3aee8918 | 1209 | buf = outreg (regcache, find_regno (regcache->tdesc, *regp), buf); |
5b1c542e PA |
1210 | regp ++; |
1211 | } | |
5472f405 | 1212 | *buf = '\0'; |
5b1c542e PA |
1213 | |
1214 | /* Formerly, if the debugger had not used any thread features | |
1215 | we would not burden it with a thread status response. This | |
1216 | was for the benefit of GDB 4.13 and older. However, in | |
1217 | recent GDB versions the check (``if (cont_thread != 0)'') | |
1218 | does not have the desired effect because of sillyness in | |
1219 | the way that the remote protocol handles specifying a | |
1220 | thread. Since thread support relies on qSymbol support | |
1221 | anyway, assume GDB can handle threads. */ | |
1222 | ||
1223 | if (using_threads && !disable_packet_Tthread) | |
1224 | { | |
1225 | /* This if (1) ought to be unnecessary. But remote_wait | |
1226 | in GDB will claim this event belongs to inferior_ptid | |
1227 | if we do not specify a thread, and there's no way for | |
1228 | gdbserver to know what inferior_ptid is. */ | |
95954743 | 1229 | if (1 || !ptid_equal (general_thread, ptid)) |
5b1c542e | 1230 | { |
dc146f7c | 1231 | int core = -1; |
bd99dc85 PA |
1232 | /* In non-stop, don't change the general thread behind |
1233 | GDB's back. */ | |
1234 | if (!non_stop) | |
1235 | general_thread = ptid; | |
95954743 PA |
1236 | sprintf (buf, "thread:"); |
1237 | buf += strlen (buf); | |
1238 | buf = write_ptid (buf, ptid); | |
1239 | strcat (buf, ";"); | |
5b1c542e | 1240 | buf += strlen (buf); |
dc146f7c | 1241 | |
3e10640f YQ |
1242 | core = target_core_of_thread (ptid); |
1243 | ||
dc146f7c VP |
1244 | if (core != -1) |
1245 | { | |
1246 | sprintf (buf, "core:"); | |
1247 | buf += strlen (buf); | |
1248 | sprintf (buf, "%x", core); | |
1249 | strcat (buf, ";"); | |
1250 | buf += strlen (buf); | |
1251 | } | |
5b1c542e PA |
1252 | } |
1253 | } | |
1254 | ||
1255 | if (dlls_changed) | |
1256 | { | |
1257 | strcpy (buf, "library:;"); | |
1258 | buf += strlen (buf); | |
1259 | dlls_changed = 0; | |
1260 | } | |
1261 | ||
0bfdf32f | 1262 | current_thread = saved_thread; |
5b1c542e PA |
1263 | } |
1264 | break; | |
1265 | case TARGET_WAITKIND_EXITED: | |
95954743 PA |
1266 | if (multi_process) |
1267 | sprintf (buf, "W%x;process:%x", | |
1268 | status->value.integer, ptid_get_pid (ptid)); | |
1269 | else | |
1270 | sprintf (buf, "W%02x", status->value.integer); | |
5b1c542e PA |
1271 | break; |
1272 | case TARGET_WAITKIND_SIGNALLED: | |
95954743 PA |
1273 | if (multi_process) |
1274 | sprintf (buf, "X%x;process:%x", | |
1275 | status->value.sig, ptid_get_pid (ptid)); | |
1276 | else | |
1277 | sprintf (buf, "X%02x", status->value.sig); | |
5b1c542e PA |
1278 | break; |
1279 | default: | |
1280 | error ("unhandled waitkind"); | |
1281 | break; | |
c906108c | 1282 | } |
c906108c SS |
1283 | } |
1284 | ||
1285 | void | |
fba45db2 | 1286 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
c906108c SS |
1287 | { |
1288 | int i = 0, j = 0; | |
1289 | char ch; | |
1290 | *mem_addr_ptr = *len_ptr = 0; | |
1291 | ||
1292 | while ((ch = from[i++]) != ',') | |
1293 | { | |
1294 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1295 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1296 | } | |
1297 | ||
1298 | for (j = 0; j < 4; j++) | |
1299 | { | |
1300 | if ((ch = from[i++]) == 0) | |
1301 | break; | |
1302 | *len_ptr = *len_ptr << 4; | |
1303 | *len_ptr |= fromhex (ch) & 0x0f; | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | void | |
fba45db2 | 1308 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
fa593d66 | 1309 | unsigned char **to_p) |
c906108c SS |
1310 | { |
1311 | int i = 0; | |
1312 | char ch; | |
1313 | *mem_addr_ptr = *len_ptr = 0; | |
1314 | ||
1315 | while ((ch = from[i++]) != ',') | |
1316 | { | |
1317 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1318 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1319 | } | |
1320 | ||
1321 | while ((ch = from[i++]) != ':') | |
1322 | { | |
1323 | *len_ptr = *len_ptr << 4; | |
1324 | *len_ptr |= fromhex (ch) & 0x0f; | |
1325 | } | |
1326 | ||
fa593d66 PA |
1327 | if (*to_p == NULL) |
1328 | *to_p = xmalloc (*len_ptr); | |
1329 | ||
a7191e8b | 1330 | hex2bin (&from[i++], *to_p, *len_ptr); |
c906108c | 1331 | } |
2f2893d9 | 1332 | |
01f9e8fa DJ |
1333 | int |
1334 | decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr, | |
fa593d66 | 1335 | unsigned int *len_ptr, unsigned char **to_p) |
01f9e8fa DJ |
1336 | { |
1337 | int i = 0; | |
1338 | char ch; | |
1339 | *mem_addr_ptr = *len_ptr = 0; | |
1340 | ||
1341 | while ((ch = from[i++]) != ',') | |
1342 | { | |
1343 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1344 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1345 | } | |
1346 | ||
1347 | while ((ch = from[i++]) != ':') | |
1348 | { | |
1349 | *len_ptr = *len_ptr << 4; | |
1350 | *len_ptr |= fromhex (ch) & 0x0f; | |
1351 | } | |
1352 | ||
fa593d66 PA |
1353 | if (*to_p == NULL) |
1354 | *to_p = xmalloc (*len_ptr); | |
1355 | ||
01f9e8fa | 1356 | if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i, |
fa593d66 | 1357 | *to_p, *len_ptr) != *len_ptr) |
01f9e8fa DJ |
1358 | return -1; |
1359 | ||
1360 | return 0; | |
1361 | } | |
1362 | ||
0e7f50da | 1363 | /* Decode a qXfer write request. */ |
d08aafef | 1364 | |
0e7f50da | 1365 | int |
d08aafef | 1366 | decode_xfer_write (char *buf, int packet_len, CORE_ADDR *offset, |
0e7f50da UW |
1367 | unsigned int *len, unsigned char *data) |
1368 | { | |
1369 | char ch; | |
d08aafef | 1370 | char *b = buf; |
0e7f50da UW |
1371 | |
1372 | /* Extract the offset. */ | |
1373 | *offset = 0; | |
1374 | while ((ch = *buf++) != ':') | |
1375 | { | |
1376 | *offset = *offset << 4; | |
1377 | *offset |= fromhex (ch) & 0x0f; | |
1378 | } | |
1379 | ||
1380 | /* Get encoded data. */ | |
d08aafef | 1381 | packet_len -= buf - b; |
0e7f50da UW |
1382 | *len = remote_unescape_input ((const gdb_byte *) buf, packet_len, |
1383 | data, packet_len); | |
1384 | return 0; | |
1385 | } | |
1386 | ||
08388c79 DE |
1387 | /* Decode the parameters of a qSearch:memory packet. */ |
1388 | ||
1389 | int | |
1390 | decode_search_memory_packet (const char *buf, int packet_len, | |
1391 | CORE_ADDR *start_addrp, | |
1392 | CORE_ADDR *search_space_lenp, | |
1393 | gdb_byte *pattern, unsigned int *pattern_lenp) | |
1394 | { | |
1395 | const char *p = buf; | |
1396 | ||
1397 | p = decode_address_to_semicolon (start_addrp, p); | |
1398 | p = decode_address_to_semicolon (search_space_lenp, p); | |
1399 | packet_len -= p - buf; | |
1400 | *pattern_lenp = remote_unescape_input ((const gdb_byte *) p, packet_len, | |
1401 | pattern, packet_len); | |
1402 | return 0; | |
1403 | } | |
1404 | ||
95954743 PA |
1405 | static void |
1406 | free_sym_cache (struct sym_cache *sym) | |
1407 | { | |
1408 | if (sym != NULL) | |
1409 | { | |
1410 | free (sym->name); | |
1411 | free (sym); | |
1412 | } | |
1413 | } | |
1414 | ||
1415 | void | |
1416 | clear_symbol_cache (struct sym_cache **symcache_p) | |
1417 | { | |
1418 | struct sym_cache *sym, *next; | |
1419 | ||
1420 | /* Check the cache first. */ | |
1421 | for (sym = *symcache_p; sym; sym = next) | |
1422 | { | |
1423 | next = sym->next; | |
1424 | free_sym_cache (sym); | |
1425 | } | |
1426 | ||
1427 | *symcache_p = NULL; | |
1428 | } | |
1429 | ||
9836d6ea PA |
1430 | /* Get the address of NAME, and return it in ADDRP if found. if |
1431 | MAY_ASK_GDB is false, assume symbol cache misses are failures. | |
fd500816 DJ |
1432 | Returns 1 if the symbol is found, 0 if it is not, -1 on error. */ |
1433 | ||
2f2893d9 | 1434 | int |
9836d6ea | 1435 | look_up_one_symbol (const char *name, CORE_ADDR *addrp, int may_ask_gdb) |
2f2893d9 DJ |
1436 | { |
1437 | char own_buf[266], *p, *q; | |
1438 | int len; | |
fd500816 | 1439 | struct sym_cache *sym; |
95954743 PA |
1440 | struct process_info *proc; |
1441 | ||
1442 | proc = current_process (); | |
fd500816 DJ |
1443 | |
1444 | /* Check the cache first. */ | |
95954743 | 1445 | for (sym = proc->symbol_cache; sym; sym = sym->next) |
fd500816 DJ |
1446 | if (strcmp (name, sym->name) == 0) |
1447 | { | |
1448 | *addrp = sym->addr; | |
1449 | return 1; | |
1450 | } | |
2f2893d9 | 1451 | |
9836d6ea PA |
1452 | /* It might not be an appropriate time to look up a symbol, |
1453 | e.g. while we're trying to fetch registers. */ | |
1454 | if (!may_ask_gdb) | |
ea025f5f DJ |
1455 | return 0; |
1456 | ||
2f2893d9 DJ |
1457 | /* Send the request. */ |
1458 | strcpy (own_buf, "qSymbol:"); | |
971dc0b8 TT |
1459 | bin2hex ((const gdb_byte *) name, own_buf + strlen ("qSymbol:"), |
1460 | strlen (name)); | |
2f2893d9 DJ |
1461 | if (putpkt (own_buf) < 0) |
1462 | return -1; | |
1463 | ||
1464 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
1465 | len = getpkt (own_buf); | |
1466 | if (len < 0) | |
1467 | return -1; | |
1468 | ||
2bbe3cc1 DJ |
1469 | /* We ought to handle pretty much any packet at this point while we |
1470 | wait for the qSymbol "response". That requires re-entering the | |
1471 | main loop. For now, this is an adequate approximation; allow | |
1472 | GDB to read from memory while it figures out the address of the | |
1473 | symbol. */ | |
1474 | while (own_buf[0] == 'm') | |
1475 | { | |
1476 | CORE_ADDR mem_addr; | |
1477 | unsigned char *mem_buf; | |
1478 | unsigned int mem_len; | |
1479 | ||
1480 | decode_m_packet (&own_buf[1], &mem_addr, &mem_len); | |
bca929d3 | 1481 | mem_buf = xmalloc (mem_len); |
2bbe3cc1 | 1482 | if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0) |
e9371aff | 1483 | bin2hex (mem_buf, own_buf, mem_len); |
2bbe3cc1 DJ |
1484 | else |
1485 | write_enn (own_buf); | |
1486 | free (mem_buf); | |
1487 | if (putpkt (own_buf) < 0) | |
1488 | return -1; | |
1489 | len = getpkt (own_buf); | |
1490 | if (len < 0) | |
1491 | return -1; | |
1492 | } | |
1b3f6016 | 1493 | |
61012eef | 1494 | if (!startswith (own_buf, "qSymbol:")) |
2f2893d9 | 1495 | { |
2bbe3cc1 | 1496 | warning ("Malformed response to qSymbol, ignoring: %s\n", own_buf); |
2f2893d9 DJ |
1497 | return -1; |
1498 | } | |
1499 | ||
1500 | p = own_buf + strlen ("qSymbol:"); | |
1501 | q = p; | |
1502 | while (*q && *q != ':') | |
1503 | q++; | |
1504 | ||
1505 | /* Make sure we found a value for the symbol. */ | |
1506 | if (p == q || *q == '\0') | |
1507 | return 0; | |
1508 | ||
1509 | decode_address (addrp, p, q - p); | |
fd500816 DJ |
1510 | |
1511 | /* Save the symbol in our cache. */ | |
8d749320 | 1512 | sym = XNEW (struct sym_cache); |
bca929d3 | 1513 | sym->name = xstrdup (name); |
fd500816 | 1514 | sym->addr = *addrp; |
95954743 PA |
1515 | sym->next = proc->symbol_cache; |
1516 | proc->symbol_cache = sym; | |
fd500816 | 1517 | |
2f2893d9 DJ |
1518 | return 1; |
1519 | } | |
c74d0ad8 | 1520 | |
fa593d66 PA |
1521 | /* Relocate an instruction to execute at a different address. OLDLOC |
1522 | is the address in the inferior memory where the instruction to | |
1523 | relocate is currently at. On input, TO points to the destination | |
1524 | where we want the instruction to be copied (and possibly adjusted) | |
1525 | to. On output, it points to one past the end of the resulting | |
1526 | instruction(s). The effect of executing the instruction at TO | |
86a30030 | 1527 | shall be the same as if executing it at OLDLOC. For example, call |
fa593d66 PA |
1528 | instructions that implicitly push the return address on the stack |
1529 | should be adjusted to return to the instruction after OLDLOC; | |
1530 | relative branches, and other PC-relative instructions need the | |
1531 | offset adjusted; etc. Returns 0 on success, -1 on failure. */ | |
1532 | ||
1533 | int | |
1534 | relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc) | |
1535 | { | |
1536 | char own_buf[266]; | |
1537 | int len; | |
1538 | ULONGEST written = 0; | |
1539 | ||
1540 | /* Send the request. */ | |
1541 | strcpy (own_buf, "qRelocInsn:"); | |
1542 | sprintf (own_buf, "qRelocInsn:%s;%s", paddress (oldloc), | |
1543 | paddress (*to)); | |
1544 | if (putpkt (own_buf) < 0) | |
1545 | return -1; | |
1546 | ||
1547 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
1548 | len = getpkt (own_buf); | |
1549 | if (len < 0) | |
1550 | return -1; | |
1551 | ||
1552 | /* We ought to handle pretty much any packet at this point while we | |
1553 | wait for the qRelocInsn "response". That requires re-entering | |
1554 | the main loop. For now, this is an adequate approximation; allow | |
1555 | GDB to access memory. */ | |
1556 | while (own_buf[0] == 'm' || own_buf[0] == 'M' || own_buf[0] == 'X') | |
1557 | { | |
1558 | CORE_ADDR mem_addr; | |
1559 | unsigned char *mem_buf = NULL; | |
1560 | unsigned int mem_len; | |
1561 | ||
1562 | if (own_buf[0] == 'm') | |
1563 | { | |
1564 | decode_m_packet (&own_buf[1], &mem_addr, &mem_len); | |
1565 | mem_buf = xmalloc (mem_len); | |
1566 | if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0) | |
e9371aff | 1567 | bin2hex (mem_buf, own_buf, mem_len); |
fa593d66 PA |
1568 | else |
1569 | write_enn (own_buf); | |
1570 | } | |
1571 | else if (own_buf[0] == 'X') | |
1572 | { | |
1573 | if (decode_X_packet (&own_buf[1], len - 1, &mem_addr, | |
1574 | &mem_len, &mem_buf) < 0 | |
1575 | || write_inferior_memory (mem_addr, mem_buf, mem_len) != 0) | |
1576 | write_enn (own_buf); | |
1577 | else | |
1578 | write_ok (own_buf); | |
1579 | } | |
1580 | else | |
1581 | { | |
1582 | decode_M_packet (&own_buf[1], &mem_addr, &mem_len, &mem_buf); | |
1583 | if (write_inferior_memory (mem_addr, mem_buf, mem_len) == 0) | |
1584 | write_ok (own_buf); | |
1585 | else | |
1586 | write_enn (own_buf); | |
1587 | } | |
1588 | free (mem_buf); | |
1589 | if (putpkt (own_buf) < 0) | |
1590 | return -1; | |
1591 | len = getpkt (own_buf); | |
1592 | if (len < 0) | |
1593 | return -1; | |
1594 | } | |
1595 | ||
1596 | if (own_buf[0] == 'E') | |
1597 | { | |
1598 | warning ("An error occurred while relocating an instruction: %s\n", | |
1599 | own_buf); | |
1600 | return -1; | |
1601 | } | |
1602 | ||
61012eef | 1603 | if (!startswith (own_buf, "qRelocInsn:")) |
fa593d66 PA |
1604 | { |
1605 | warning ("Malformed response to qRelocInsn, ignoring: %s\n", | |
1606 | own_buf); | |
1607 | return -1; | |
1608 | } | |
1609 | ||
1610 | unpack_varlen_hex (own_buf + strlen ("qRelocInsn:"), &written); | |
1611 | ||
1612 | *to += written; | |
1613 | return 0; | |
1614 | } | |
1615 | ||
c74d0ad8 | 1616 | void |
bce7165d | 1617 | monitor_output (const char *msg) |
c74d0ad8 | 1618 | { |
0a822afb TT |
1619 | int len = strlen (msg); |
1620 | char *buf = xmalloc (len * 2 + 2); | |
c74d0ad8 DJ |
1621 | |
1622 | buf[0] = 'O'; | |
971dc0b8 | 1623 | bin2hex ((const gdb_byte *) msg, buf + 1, len); |
c74d0ad8 DJ |
1624 | |
1625 | putpkt (buf); | |
1626 | free (buf); | |
1627 | } | |
255e7678 | 1628 | |
0fb4aa4b | 1629 | #endif |