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" |
b80864fb | 26 | #if HAVE_SYS_IOCTL_H |
c906108c | 27 | #include <sys/ioctl.h> |
b80864fb | 28 | #endif |
68070c10 | 29 | #if HAVE_SYS_FILE_H |
c906108c | 30 | #include <sys/file.h> |
68070c10 | 31 | #endif |
b80864fb | 32 | #if HAVE_NETINET_IN_H |
c906108c | 33 | #include <netinet/in.h> |
b80864fb DJ |
34 | #endif |
35 | #if HAVE_SYS_SOCKET_H | |
c906108c | 36 | #include <sys/socket.h> |
b80864fb DJ |
37 | #endif |
38 | #if HAVE_NETDB_H | |
c906108c | 39 | #include <netdb.h> |
b80864fb DJ |
40 | #endif |
41 | #if HAVE_NETINET_TCP_H | |
c906108c | 42 | #include <netinet/tcp.h> |
b80864fb DJ |
43 | #endif |
44 | #if HAVE_SYS_IOCTL_H | |
c906108c | 45 | #include <sys/ioctl.h> |
b80864fb | 46 | #endif |
68070c10 | 47 | #if HAVE_SIGNAL_H |
c906108c | 48 | #include <signal.h> |
68070c10 PA |
49 | #endif |
50 | #if HAVE_FCNTL_H | |
c906108c | 51 | #include <fcntl.h> |
68070c10 | 52 | #endif |
cf30a8e1 C |
53 | #include <sys/time.h> |
54 | #include <unistd.h> | |
b80864fb | 55 | #if HAVE_ARPA_INET_H |
0729219d | 56 | #include <arpa/inet.h> |
b80864fb | 57 | #endif |
53ce3c39 | 58 | #include <sys/stat.h> |
b80864fb DJ |
59 | |
60 | #if USE_WIN32API | |
12ea4b69 | 61 | #include <winsock2.h> |
b80864fb | 62 | #endif |
c906108c | 63 | |
ac8c974e AR |
64 | #if __QNX__ |
65 | #include <sys/iomgr.h> | |
66 | #endif /* __QNX__ */ | |
67 | ||
f450004a DJ |
68 | #ifndef HAVE_SOCKLEN_T |
69 | typedef int socklen_t; | |
70 | #endif | |
71 | ||
0fb4aa4b PA |
72 | #ifndef IN_PROCESS_AGENT |
73 | ||
7390519e PA |
74 | #if USE_WIN32API |
75 | # define INVALID_DESCRIPTOR INVALID_SOCKET | |
76 | #else | |
77 | # define INVALID_DESCRIPTOR -1 | |
78 | #endif | |
79 | ||
24b066ba DE |
80 | /* Extra value for readchar_callback. */ |
81 | enum { | |
82 | /* The callback is currently not scheduled. */ | |
83 | NOT_SCHEDULED = -1 | |
84 | }; | |
85 | ||
86 | /* Status of the readchar callback. | |
87 | Either NOT_SCHEDULED or the callback id. */ | |
88 | static int readchar_callback = NOT_SCHEDULED; | |
89 | ||
bc3b5632 | 90 | static int readchar (void); |
24b066ba DE |
91 | static void reset_readchar (void); |
92 | static void reschedule (void); | |
bc3b5632 | 93 | |
fd500816 DJ |
94 | /* A cache entry for a successfully looked-up symbol. */ |
95 | struct sym_cache | |
96 | { | |
95954743 | 97 | char *name; |
fd500816 DJ |
98 | CORE_ADDR addr; |
99 | struct sym_cache *next; | |
100 | }; | |
101 | ||
c906108c | 102 | int remote_debug = 0; |
03863182 | 103 | struct ui_file *gdb_stdlog; |
c906108c | 104 | |
e0f9f062 DE |
105 | static int remote_is_stdio = 0; |
106 | ||
ec48365d PA |
107 | static gdb_fildes_t remote_desc = INVALID_DESCRIPTOR; |
108 | static gdb_fildes_t listen_desc = INVALID_DESCRIPTOR; | |
c906108c | 109 | |
0d62e5e8 DJ |
110 | /* FIXME headerize? */ |
111 | extern int using_threads; | |
112 | extern int debug_threads; | |
113 | ||
a6f3e723 SL |
114 | /* If true, then GDB has requested noack mode. */ |
115 | int noack_mode = 0; | |
116 | /* If true, then we tell GDB to use noack mode by default. */ | |
117 | int transport_is_reliable = 0; | |
118 | ||
0f48aa01 | 119 | #ifdef USE_WIN32API |
68070c10 PA |
120 | # define read(fd, buf, len) recv (fd, (char *) buf, len, 0) |
121 | # define write(fd, buf, len) send (fd, (char *) buf, len, 0) | |
0f48aa01 DJ |
122 | #endif |
123 | ||
8336d594 PA |
124 | int |
125 | gdb_connected (void) | |
126 | { | |
127 | return remote_desc != INVALID_DESCRIPTOR; | |
128 | } | |
129 | ||
e0f9f062 DE |
130 | /* Return true if the remote connection is over stdio. */ |
131 | ||
132 | int | |
133 | remote_connection_is_stdio (void) | |
134 | { | |
135 | return remote_is_stdio; | |
136 | } | |
137 | ||
8336d594 PA |
138 | static void |
139 | enable_async_notification (int fd) | |
140 | { | |
141 | #if defined(F_SETFL) && defined (FASYNC) | |
142 | int save_fcntl_flags; | |
143 | ||
144 | save_fcntl_flags = fcntl (fd, F_GETFL, 0); | |
145 | fcntl (fd, F_SETFL, save_fcntl_flags | FASYNC); | |
146 | #if defined (F_SETOWN) | |
147 | fcntl (fd, F_SETOWN, getpid ()); | |
148 | #endif | |
149 | #endif | |
150 | } | |
151 | ||
152 | static int | |
153 | handle_accept_event (int err, gdb_client_data client_data) | |
154 | { | |
155 | struct sockaddr_in sockaddr; | |
156 | socklen_t tmp; | |
157 | ||
158 | if (debug_threads) | |
87ce2a04 | 159 | debug_printf ("handling possible accept event\n"); |
8336d594 PA |
160 | |
161 | tmp = sizeof (sockaddr); | |
162 | remote_desc = accept (listen_desc, (struct sockaddr *) &sockaddr, &tmp); | |
163 | if (remote_desc == -1) | |
164 | perror_with_name ("Accept failed"); | |
165 | ||
166 | /* Enable TCP keep alive process. */ | |
167 | tmp = 1; | |
168 | setsockopt (remote_desc, SOL_SOCKET, SO_KEEPALIVE, | |
169 | (char *) &tmp, sizeof (tmp)); | |
170 | ||
171 | /* Tell TCP not to delay small packets. This greatly speeds up | |
172 | interactive response. */ | |
173 | tmp = 1; | |
174 | setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY, | |
175 | (char *) &tmp, sizeof (tmp)); | |
176 | ||
177 | #ifndef USE_WIN32API | |
8336d594 PA |
178 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply |
179 | exits when the remote side dies. */ | |
03f2bd59 JK |
180 | #endif |
181 | ||
182 | if (run_once) | |
183 | { | |
184 | #ifndef USE_WIN32API | |
185 | close (listen_desc); /* No longer need this */ | |
8336d594 | 186 | #else |
03f2bd59 | 187 | closesocket (listen_desc); /* No longer need this */ |
8336d594 | 188 | #endif |
03f2bd59 | 189 | } |
8336d594 | 190 | |
03f2bd59 JK |
191 | /* Even if !RUN_ONCE no longer notice new connections. Still keep the |
192 | descriptor open for add_file_handler to wait for a new connection. */ | |
8336d594 PA |
193 | delete_file_handler (listen_desc); |
194 | ||
195 | /* Convert IP address to string. */ | |
196 | fprintf (stderr, "Remote debugging from host %s\n", | |
197 | inet_ntoa (sockaddr.sin_addr)); | |
198 | ||
199 | enable_async_notification (remote_desc); | |
200 | ||
201 | /* Register the event loop handler. */ | |
202 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
203 | ||
204 | /* We have a new GDB connection now. If we were disconnected | |
205 | tracing, there's a window where the target could report a stop | |
206 | event to the event loop, and since we have a connection now, we'd | |
207 | try to send vStopped notifications to GDB. But, don't do that | |
208 | until GDB as selected all-stop/non-stop, and has queried the | |
209 | threads' status ('?'). */ | |
210 | target_async (0); | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
03f2bd59 JK |
215 | /* Prepare for a later connection to a remote debugger. |
216 | NAME is the filename used for communication. */ | |
217 | ||
218 | void | |
219 | remote_prepare (char *name) | |
220 | { | |
221 | char *port_str; | |
222 | #ifdef USE_WIN32API | |
223 | static int winsock_initialized; | |
224 | #endif | |
225 | int port; | |
226 | struct sockaddr_in sockaddr; | |
227 | socklen_t tmp; | |
228 | char *port_end; | |
229 | ||
e0f9f062 DE |
230 | remote_is_stdio = 0; |
231 | if (strcmp (name, STDIO_CONNECTION_NAME) == 0) | |
232 | { | |
233 | /* We need to record fact that we're using stdio sooner than the | |
234 | call to remote_open so start_inferior knows the connection is | |
235 | via stdio. */ | |
236 | remote_is_stdio = 1; | |
237 | transport_is_reliable = 1; | |
238 | return; | |
239 | } | |
240 | ||
03f2bd59 JK |
241 | port_str = strchr (name, ':'); |
242 | if (port_str == NULL) | |
243 | { | |
244 | transport_is_reliable = 0; | |
245 | return; | |
246 | } | |
247 | ||
248 | port = strtoul (port_str + 1, &port_end, 10); | |
249 | if (port_str[1] == '\0' || *port_end != '\0') | |
50278d59 | 250 | error ("Bad port argument: %s", name); |
03f2bd59 JK |
251 | |
252 | #ifdef USE_WIN32API | |
253 | if (!winsock_initialized) | |
254 | { | |
255 | WSADATA wsad; | |
256 | ||
257 | WSAStartup (MAKEWORD (1, 0), &wsad); | |
258 | winsock_initialized = 1; | |
259 | } | |
260 | #endif | |
261 | ||
262 | listen_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); | |
263 | if (listen_desc == -1) | |
264 | perror_with_name ("Can't open socket"); | |
265 | ||
266 | /* Allow rapid reuse of this port. */ | |
267 | tmp = 1; | |
268 | setsockopt (listen_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, | |
269 | sizeof (tmp)); | |
270 | ||
271 | sockaddr.sin_family = PF_INET; | |
272 | sockaddr.sin_port = htons (port); | |
273 | sockaddr.sin_addr.s_addr = INADDR_ANY; | |
274 | ||
275 | if (bind (listen_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) | |
276 | || listen (listen_desc, 1)) | |
277 | perror_with_name ("Can't bind address"); | |
278 | ||
279 | transport_is_reliable = 1; | |
280 | } | |
281 | ||
c906108c SS |
282 | /* Open a connection to a remote debugger. |
283 | NAME is the filename used for communication. */ | |
284 | ||
285 | void | |
fba45db2 | 286 | remote_open (char *name) |
c906108c | 287 | { |
8264bb58 DJ |
288 | char *port_str; |
289 | ||
290 | port_str = strchr (name, ':'); | |
e0f9f062 | 291 | #ifdef USE_WIN32API |
8264bb58 | 292 | if (port_str == NULL) |
e0f9f062 DE |
293 | error ("Only <host>:<port> is supported on this platform."); |
294 | #endif | |
295 | ||
296 | if (strcmp (name, STDIO_CONNECTION_NAME) == 0) | |
297 | { | |
298 | fprintf (stderr, "Remote debugging using stdio\n"); | |
299 | ||
300 | /* Use stdin as the handle of the connection. | |
301 | We only select on reads, for example. */ | |
302 | remote_desc = fileno (stdin); | |
303 | ||
304 | enable_async_notification (remote_desc); | |
305 | ||
306 | /* Register the event loop handler. */ | |
307 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
308 | } | |
309 | #ifndef USE_WIN32API | |
310 | else if (port_str == NULL) | |
c906108c | 311 | { |
8264bb58 DJ |
312 | struct stat statbuf; |
313 | ||
314 | if (stat (name, &statbuf) == 0 | |
315 | && (S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode))) | |
316 | remote_desc = open (name, O_RDWR); | |
317 | else | |
318 | { | |
319 | errno = EINVAL; | |
320 | remote_desc = -1; | |
321 | } | |
322 | ||
c906108c SS |
323 | if (remote_desc < 0) |
324 | perror_with_name ("Could not open remote device"); | |
325 | ||
326 | #ifdef HAVE_TERMIOS | |
327 | { | |
328 | struct termios termios; | |
c5aa993b | 329 | tcgetattr (remote_desc, &termios); |
c906108c SS |
330 | |
331 | termios.c_iflag = 0; | |
332 | termios.c_oflag = 0; | |
333 | termios.c_lflag = 0; | |
c5aa993b | 334 | termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 335 | termios.c_cflag |= CLOCAL | CS8; |
d0608e50 | 336 | termios.c_cc[VMIN] = 1; |
c906108c SS |
337 | termios.c_cc[VTIME] = 0; |
338 | ||
c5aa993b | 339 | tcsetattr (remote_desc, TCSANOW, &termios); |
c906108c SS |
340 | } |
341 | #endif | |
342 | ||
343 | #ifdef HAVE_TERMIO | |
344 | { | |
345 | struct termio termio; | |
346 | ioctl (remote_desc, TCGETA, &termio); | |
347 | ||
348 | termio.c_iflag = 0; | |
349 | termio.c_oflag = 0; | |
350 | termio.c_lflag = 0; | |
c5aa993b | 351 | termio.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 352 | termio.c_cflag |= CLOCAL | CS8; |
d0608e50 | 353 | termio.c_cc[VMIN] = 1; |
c906108c SS |
354 | termio.c_cc[VTIME] = 0; |
355 | ||
356 | ioctl (remote_desc, TCSETA, &termio); | |
357 | } | |
358 | #endif | |
359 | ||
360 | #ifdef HAVE_SGTTY | |
361 | { | |
362 | struct sgttyb sg; | |
363 | ||
364 | ioctl (remote_desc, TIOCGETP, &sg); | |
365 | sg.sg_flags = RAW; | |
366 | ioctl (remote_desc, TIOCSETP, &sg); | |
367 | } | |
368 | #endif | |
369 | ||
e641a1ca | 370 | fprintf (stderr, "Remote debugging using %s\n", name); |
a6f3e723 | 371 | |
8336d594 PA |
372 | enable_async_notification (remote_desc); |
373 | ||
374 | /* Register the event loop handler. */ | |
375 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
c906108c | 376 | } |
e0f9f062 | 377 | #endif /* USE_WIN32API */ |
c906108c SS |
378 | else |
379 | { | |
c906108c | 380 | int port; |
03f2bd59 | 381 | socklen_t len; |
c906108c | 382 | struct sockaddr_in sockaddr; |
c906108c | 383 | |
03f2bd59 JK |
384 | len = sizeof (sockaddr); |
385 | if (getsockname (listen_desc, | |
386 | (struct sockaddr *) &sockaddr, &len) < 0 | |
387 | || len < sizeof (sockaddr)) | |
388 | perror_with_name ("Can't determine port"); | |
389 | port = ntohs (sockaddr.sin_port); | |
6f8486da | 390 | |
6910d122 | 391 | fprintf (stderr, "Listening on port %d\n", port); |
b80864fb | 392 | fflush (stderr); |
6910d122 | 393 | |
8336d594 PA |
394 | /* Register the event loop handler. */ |
395 | add_file_handler (listen_desc, handle_accept_event, NULL); | |
c906108c | 396 | } |
c906108c SS |
397 | } |
398 | ||
399 | void | |
fba45db2 | 400 | remote_close (void) |
c906108c | 401 | { |
bd99dc85 PA |
402 | delete_file_handler (remote_desc); |
403 | ||
b80864fb DJ |
404 | #ifdef USE_WIN32API |
405 | closesocket (remote_desc); | |
406 | #else | |
e0f9f062 DE |
407 | if (! remote_connection_is_stdio ()) |
408 | close (remote_desc); | |
b80864fb | 409 | #endif |
8336d594 | 410 | remote_desc = INVALID_DESCRIPTOR; |
24b066ba DE |
411 | |
412 | reset_readchar (); | |
c906108c SS |
413 | } |
414 | ||
0fb4aa4b PA |
415 | #endif |
416 | ||
0fb4aa4b PA |
417 | #ifndef IN_PROCESS_AGENT |
418 | ||
dae5f5cf | 419 | void |
2f2893d9 DJ |
420 | decode_address (CORE_ADDR *addrp, const char *start, int len) |
421 | { | |
422 | CORE_ADDR addr; | |
423 | char ch; | |
424 | int i; | |
425 | ||
426 | addr = 0; | |
427 | for (i = 0; i < len; i++) | |
428 | { | |
429 | ch = start[i]; | |
430 | addr = addr << 4; | |
431 | addr = addr | (fromhex (ch) & 0x0f); | |
432 | } | |
433 | *addrp = addr; | |
434 | } | |
435 | ||
89be2091 DJ |
436 | const char * |
437 | decode_address_to_semicolon (CORE_ADDR *addrp, const char *start) | |
438 | { | |
439 | const char *end; | |
440 | ||
441 | end = start; | |
442 | while (*end != '\0' && *end != ';') | |
443 | end++; | |
444 | ||
445 | decode_address (addrp, start, end - start); | |
446 | ||
447 | if (*end == ';') | |
448 | end++; | |
449 | return end; | |
450 | } | |
451 | ||
0fb4aa4b PA |
452 | #endif |
453 | ||
0fb4aa4b PA |
454 | #ifndef IN_PROCESS_AGENT |
455 | ||
5ffff7c1 DJ |
456 | /* Look for a sequence of characters which can be run-length encoded. |
457 | If there are any, update *CSUM and *P. Otherwise, output the | |
458 | single character. Return the number of characters consumed. */ | |
459 | ||
460 | static int | |
461 | try_rle (char *buf, int remaining, unsigned char *csum, char **p) | |
462 | { | |
463 | int n; | |
464 | ||
465 | /* Always output the character. */ | |
466 | *csum += buf[0]; | |
467 | *(*p)++ = buf[0]; | |
468 | ||
469 | /* Don't go past '~'. */ | |
470 | if (remaining > 97) | |
471 | remaining = 97; | |
472 | ||
473 | for (n = 1; n < remaining; n++) | |
474 | if (buf[n] != buf[0]) | |
475 | break; | |
476 | ||
477 | /* N is the index of the first character not the same as buf[0]. | |
478 | buf[0] is counted twice, so by decrementing N, we get the number | |
479 | of characters the RLE sequence will replace. */ | |
480 | n--; | |
481 | ||
482 | if (n < 3) | |
483 | return 1; | |
484 | ||
485 | /* Skip the frame characters. The manual says to skip '+' and '-' | |
486 | also, but there's no reason to. Unfortunately these two unusable | |
487 | characters double the encoded length of a four byte zero | |
488 | value. */ | |
489 | while (n + 29 == '$' || n + 29 == '#') | |
490 | n--; | |
491 | ||
492 | *csum += '*'; | |
493 | *(*p)++ = '*'; | |
494 | *csum += n + 29; | |
495 | *(*p)++ = n + 29; | |
496 | ||
497 | return n + 1; | |
498 | } | |
499 | ||
0fb4aa4b PA |
500 | #endif |
501 | ||
0fb4aa4b PA |
502 | #ifndef IN_PROCESS_AGENT |
503 | ||
95954743 PA |
504 | /* Write a PTID to BUF. Returns BUF+CHARACTERS_WRITTEN. */ |
505 | ||
506 | char * | |
507 | write_ptid (char *buf, ptid_t ptid) | |
508 | { | |
509 | int pid, tid; | |
510 | ||
511 | if (multi_process) | |
512 | { | |
513 | pid = ptid_get_pid (ptid); | |
514 | if (pid < 0) | |
515 | buf += sprintf (buf, "p-%x.", -pid); | |
516 | else | |
517 | buf += sprintf (buf, "p%x.", pid); | |
518 | } | |
519 | tid = ptid_get_lwp (ptid); | |
520 | if (tid < 0) | |
521 | buf += sprintf (buf, "-%x", -tid); | |
522 | else | |
523 | buf += sprintf (buf, "%x", tid); | |
524 | ||
525 | return buf; | |
526 | } | |
527 | ||
528 | ULONGEST | |
529 | hex_or_minus_one (char *buf, char **obuf) | |
530 | { | |
531 | ULONGEST ret; | |
532 | ||
533 | if (strncmp (buf, "-1", 2) == 0) | |
534 | { | |
535 | ret = (ULONGEST) -1; | |
536 | buf += 2; | |
537 | } | |
538 | else | |
539 | buf = unpack_varlen_hex (buf, &ret); | |
540 | ||
541 | if (obuf) | |
542 | *obuf = buf; | |
543 | ||
544 | return ret; | |
545 | } | |
546 | ||
547 | /* Extract a PTID from BUF. If non-null, OBUF is set to the to one | |
548 | passed the last parsed char. Returns null_ptid on error. */ | |
549 | ptid_t | |
550 | read_ptid (char *buf, char **obuf) | |
551 | { | |
552 | char *p = buf; | |
553 | char *pp; | |
554 | ULONGEST pid = 0, tid = 0; | |
555 | ||
556 | if (*p == 'p') | |
557 | { | |
558 | /* Multi-process ptid. */ | |
559 | pp = unpack_varlen_hex (p + 1, &pid); | |
560 | if (*pp != '.') | |
561 | error ("invalid remote ptid: %s\n", p); | |
562 | ||
563 | p = pp + 1; | |
564 | ||
565 | tid = hex_or_minus_one (p, &pp); | |
566 | ||
567 | if (obuf) | |
568 | *obuf = pp; | |
569 | return ptid_build (pid, tid, 0); | |
570 | } | |
571 | ||
572 | /* No multi-process. Just a tid. */ | |
573 | tid = hex_or_minus_one (p, &pp); | |
574 | ||
575 | /* Since the stub is not sending a process id, then default to | |
576 | what's in the current inferior. */ | |
fbd5db48 | 577 | pid = ptid_get_pid (current_ptid); |
95954743 PA |
578 | |
579 | if (obuf) | |
580 | *obuf = pp; | |
581 | return ptid_build (pid, tid, 0); | |
582 | } | |
583 | ||
e0f9f062 DE |
584 | /* Write COUNT bytes in BUF to the client. |
585 | The result is the number of bytes written or -1 if error. | |
586 | This may return less than COUNT. */ | |
587 | ||
588 | static int | |
589 | write_prim (const void *buf, int count) | |
590 | { | |
591 | if (remote_connection_is_stdio ()) | |
592 | return write (fileno (stdout), buf, count); | |
593 | else | |
594 | return write (remote_desc, buf, count); | |
595 | } | |
596 | ||
597 | /* Read COUNT bytes from the client and store in BUF. | |
598 | The result is the number of bytes read or -1 if error. | |
599 | This may return less than COUNT. */ | |
600 | ||
601 | static int | |
602 | read_prim (void *buf, int count) | |
603 | { | |
604 | if (remote_connection_is_stdio ()) | |
605 | return read (fileno (stdin), buf, count); | |
606 | else | |
607 | return read (remote_desc, buf, count); | |
608 | } | |
609 | ||
c906108c | 610 | /* Send a packet to the remote machine, with error checking. |
01f9e8fa DJ |
611 | The data of the packet is in BUF, and the length of the |
612 | packet is in CNT. Returns >= 0 on success, -1 otherwise. */ | |
c906108c | 613 | |
bd99dc85 PA |
614 | static int |
615 | putpkt_binary_1 (char *buf, int cnt, int is_notif) | |
c906108c SS |
616 | { |
617 | int i; | |
618 | unsigned char csum = 0; | |
0a30fbc4 | 619 | char *buf2; |
c906108c | 620 | char *p; |
bc3b5632 | 621 | int cc; |
c906108c | 622 | |
e6edda56 | 623 | buf2 = xmalloc (strlen ("$") + cnt + strlen ("#nn") + 1); |
0a30fbc4 | 624 | |
c906108c SS |
625 | /* Copy the packet into buffer BUF2, encapsulating it |
626 | and giving it a checksum. */ | |
627 | ||
628 | p = buf2; | |
bd99dc85 PA |
629 | if (is_notif) |
630 | *p++ = '%'; | |
631 | else | |
632 | *p++ = '$'; | |
c906108c | 633 | |
5ffff7c1 DJ |
634 | for (i = 0; i < cnt;) |
635 | i += try_rle (buf + i, cnt - i, &csum, &p); | |
636 | ||
c906108c SS |
637 | *p++ = '#'; |
638 | *p++ = tohex ((csum >> 4) & 0xf); | |
639 | *p++ = tohex (csum & 0xf); | |
640 | ||
641 | *p = '\0'; | |
642 | ||
643 | /* Send it over and over until we get a positive ack. */ | |
644 | ||
645 | do | |
646 | { | |
e0f9f062 | 647 | if (write_prim (buf2, p - buf2) != p - buf2) |
c906108c SS |
648 | { |
649 | perror ("putpkt(write)"); | |
f88c79e6 | 650 | free (buf2); |
c906108c SS |
651 | return -1; |
652 | } | |
653 | ||
bd99dc85 | 654 | if (noack_mode || is_notif) |
a6f3e723 SL |
655 | { |
656 | /* Don't expect an ack then. */ | |
657 | if (remote_debug) | |
658 | { | |
bd99dc85 PA |
659 | if (is_notif) |
660 | fprintf (stderr, "putpkt (\"%s\"); [notif]\n", buf2); | |
661 | else | |
662 | fprintf (stderr, "putpkt (\"%s\"); [noack mode]\n", buf2); | |
a6f3e723 SL |
663 | fflush (stderr); |
664 | } | |
665 | break; | |
666 | } | |
667 | ||
c906108c | 668 | if (remote_debug) |
0d62e5e8 DJ |
669 | { |
670 | fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2); | |
671 | fflush (stderr); | |
672 | } | |
0d62e5e8 | 673 | |
bc3b5632 | 674 | cc = readchar (); |
c906108c | 675 | |
bc3b5632 DE |
676 | if (cc < 0) |
677 | { | |
0a30fbc4 | 678 | free (buf2); |
c906108c SS |
679 | return -1; |
680 | } | |
0d62e5e8 | 681 | |
bc3b5632 DE |
682 | if (remote_debug) |
683 | { | |
684 | fprintf (stderr, "[received '%c' (0x%x)]\n", cc, cc); | |
685 | fflush (stderr); | |
686 | } | |
687 | ||
0d62e5e8 | 688 | /* Check for an input interrupt while we're here. */ |
0bfdf32f | 689 | if (cc == '\003' && current_thread != NULL) |
ef57601b | 690 | (*the_target->request_interrupt) (); |
c906108c | 691 | } |
bc3b5632 | 692 | while (cc != '+'); |
c906108c | 693 | |
0a30fbc4 | 694 | free (buf2); |
c906108c SS |
695 | return 1; /* Success! */ |
696 | } | |
697 | ||
bd99dc85 PA |
698 | int |
699 | putpkt_binary (char *buf, int cnt) | |
700 | { | |
701 | return putpkt_binary_1 (buf, cnt, 0); | |
702 | } | |
703 | ||
01f9e8fa DJ |
704 | /* Send a packet to the remote machine, with error checking. The data |
705 | of the packet is in BUF, and the packet should be a NUL-terminated | |
706 | string. Returns >= 0 on success, -1 otherwise. */ | |
707 | ||
708 | int | |
709 | putpkt (char *buf) | |
710 | { | |
711 | return putpkt_binary (buf, strlen (buf)); | |
712 | } | |
713 | ||
bd99dc85 PA |
714 | int |
715 | putpkt_notif (char *buf) | |
716 | { | |
717 | return putpkt_binary_1 (buf, strlen (buf), 1); | |
718 | } | |
719 | ||
c906108c SS |
720 | /* Come here when we get an input interrupt from the remote side. This |
721 | interrupt should only be active while we are waiting for the child to do | |
bc3b5632 DE |
722 | something. Thus this assumes readchar:bufcnt is 0. |
723 | About the only thing that should come through is a ^C, which | |
ef57601b | 724 | will cause us to request child interruption. */ |
c906108c SS |
725 | |
726 | static void | |
0a30fbc4 | 727 | input_interrupt (int unused) |
c906108c | 728 | { |
cf30a8e1 C |
729 | fd_set readset; |
730 | struct timeval immediate = { 0, 0 }; | |
c906108c | 731 | |
cf30a8e1 C |
732 | /* Protect against spurious interrupts. This has been observed to |
733 | be a problem under NetBSD 1.4 and 1.5. */ | |
c906108c | 734 | |
cf30a8e1 C |
735 | FD_ZERO (&readset); |
736 | FD_SET (remote_desc, &readset); | |
737 | if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) | |
c906108c | 738 | { |
cf30a8e1 | 739 | int cc; |
fd500816 | 740 | char c = 0; |
7390519e | 741 | |
e0f9f062 | 742 | cc = read_prim (&c, 1); |
c906108c | 743 | |
0bfdf32f | 744 | if (cc != 1 || c != '\003' || current_thread == NULL) |
cf30a8e1 | 745 | { |
fd500816 DJ |
746 | fprintf (stderr, "input_interrupt, count = %d c = %d ('%c')\n", |
747 | cc, c, c); | |
cf30a8e1 C |
748 | return; |
749 | } | |
7390519e | 750 | |
ef57601b | 751 | (*the_target->request_interrupt) (); |
cf30a8e1 | 752 | } |
c906108c | 753 | } |
7390519e PA |
754 | |
755 | /* Check if the remote side sent us an interrupt request (^C). */ | |
756 | void | |
757 | check_remote_input_interrupt_request (void) | |
758 | { | |
759 | /* This function may be called before establishing communications, | |
760 | therefore we need to validate the remote descriptor. */ | |
761 | ||
762 | if (remote_desc == INVALID_DESCRIPTOR) | |
763 | return; | |
764 | ||
765 | input_interrupt (0); | |
766 | } | |
b80864fb DJ |
767 | |
768 | /* Asynchronous I/O support. SIGIO must be enabled when waiting, in order to | |
769 | accept Control-C from the client, and must be disabled when talking to | |
770 | the client. */ | |
c906108c | 771 | |
a20d5e98 | 772 | static void |
62ea82f5 DJ |
773 | unblock_async_io (void) |
774 | { | |
b80864fb | 775 | #ifndef USE_WIN32API |
62ea82f5 | 776 | sigset_t sigio_set; |
a20d5e98 | 777 | |
62ea82f5 DJ |
778 | sigemptyset (&sigio_set); |
779 | sigaddset (&sigio_set, SIGIO); | |
780 | sigprocmask (SIG_UNBLOCK, &sigio_set, NULL); | |
b80864fb | 781 | #endif |
62ea82f5 DJ |
782 | } |
783 | ||
ac8c974e AR |
784 | #ifdef __QNX__ |
785 | static void | |
786 | nto_comctrl (int enable) | |
787 | { | |
788 | struct sigevent event; | |
789 | ||
790 | if (enable) | |
791 | { | |
792 | event.sigev_notify = SIGEV_SIGNAL_THREAD; | |
793 | event.sigev_signo = SIGIO; | |
794 | event.sigev_code = 0; | |
795 | event.sigev_value.sival_ptr = NULL; | |
796 | event.sigev_priority = -1; | |
797 | ionotify (remote_desc, _NOTIFY_ACTION_POLLARM, _NOTIFY_COND_INPUT, | |
798 | &event); | |
799 | } | |
800 | else | |
801 | ionotify (remote_desc, _NOTIFY_ACTION_POLL, _NOTIFY_COND_INPUT, NULL); | |
802 | } | |
803 | #endif /* __QNX__ */ | |
804 | ||
805 | ||
fd500816 DJ |
806 | /* Current state of asynchronous I/O. */ |
807 | static int async_io_enabled; | |
808 | ||
809 | /* Enable asynchronous I/O. */ | |
c906108c | 810 | void |
fba45db2 | 811 | enable_async_io (void) |
c906108c | 812 | { |
fd500816 DJ |
813 | if (async_io_enabled) |
814 | return; | |
815 | ||
b80864fb | 816 | #ifndef USE_WIN32API |
c906108c | 817 | signal (SIGIO, input_interrupt); |
b80864fb | 818 | #endif |
fd500816 | 819 | async_io_enabled = 1; |
ac8c974e AR |
820 | #ifdef __QNX__ |
821 | nto_comctrl (1); | |
822 | #endif /* __QNX__ */ | |
c906108c SS |
823 | } |
824 | ||
fd500816 | 825 | /* Disable asynchronous I/O. */ |
c906108c | 826 | void |
fba45db2 | 827 | disable_async_io (void) |
c906108c | 828 | { |
fd500816 DJ |
829 | if (!async_io_enabled) |
830 | return; | |
831 | ||
b80864fb | 832 | #ifndef USE_WIN32API |
c906108c | 833 | signal (SIGIO, SIG_IGN); |
b80864fb | 834 | #endif |
fd500816 | 835 | async_io_enabled = 0; |
ac8c974e AR |
836 | #ifdef __QNX__ |
837 | nto_comctrl (0); | |
838 | #endif /* __QNX__ */ | |
839 | ||
c906108c SS |
840 | } |
841 | ||
a20d5e98 DJ |
842 | void |
843 | initialize_async_io (void) | |
844 | { | |
845 | /* Make sure that async I/O starts disabled. */ | |
846 | async_io_enabled = 1; | |
847 | disable_async_io (); | |
848 | ||
849 | /* Make sure the signal is unblocked. */ | |
850 | unblock_async_io (); | |
851 | } | |
852 | ||
24b066ba DE |
853 | /* Internal buffer used by readchar. |
854 | These are global to readchar because reschedule_remote needs to be | |
855 | able to tell whether the buffer is empty. */ | |
856 | ||
857 | static unsigned char readchar_buf[BUFSIZ]; | |
858 | static int readchar_bufcnt = 0; | |
859 | static unsigned char *readchar_bufp; | |
860 | ||
c906108c SS |
861 | /* Returns next char from remote GDB. -1 if error. */ |
862 | ||
863 | static int | |
fba45db2 | 864 | readchar (void) |
c906108c | 865 | { |
24b066ba | 866 | int ch; |
c906108c | 867 | |
24b066ba DE |
868 | if (readchar_bufcnt == 0) |
869 | { | |
e0f9f062 | 870 | readchar_bufcnt = read_prim (readchar_buf, sizeof (readchar_buf)); |
c906108c | 871 | |
24b066ba DE |
872 | if (readchar_bufcnt <= 0) |
873 | { | |
874 | if (readchar_bufcnt == 0) | |
875 | fprintf (stderr, "readchar: Got EOF\n"); | |
876 | else | |
877 | perror ("readchar"); | |
c906108c | 878 | |
24b066ba DE |
879 | return -1; |
880 | } | |
c906108c | 881 | |
24b066ba | 882 | readchar_bufp = readchar_buf; |
c906108c SS |
883 | } |
884 | ||
24b066ba DE |
885 | readchar_bufcnt--; |
886 | ch = *readchar_bufp++; | |
887 | reschedule (); | |
888 | return ch; | |
889 | } | |
890 | ||
891 | /* Reset the readchar state machine. */ | |
892 | ||
893 | static void | |
894 | reset_readchar (void) | |
895 | { | |
896 | readchar_bufcnt = 0; | |
897 | if (readchar_callback != NOT_SCHEDULED) | |
898 | { | |
899 | delete_callback_event (readchar_callback); | |
900 | readchar_callback = NOT_SCHEDULED; | |
901 | } | |
902 | } | |
903 | ||
904 | /* Process remaining data in readchar_buf. */ | |
905 | ||
906 | static int | |
907 | process_remaining (void *context) | |
908 | { | |
909 | int res; | |
910 | ||
911 | /* This is a one-shot event. */ | |
912 | readchar_callback = NOT_SCHEDULED; | |
913 | ||
914 | if (readchar_bufcnt > 0) | |
915 | res = handle_serial_event (0, NULL); | |
916 | else | |
917 | res = 0; | |
918 | ||
919 | return res; | |
920 | } | |
921 | ||
922 | /* If there is still data in the buffer, queue another event to process it, | |
923 | we can't sleep in select yet. */ | |
924 | ||
925 | static void | |
926 | reschedule (void) | |
927 | { | |
928 | if (readchar_bufcnt > 0 && readchar_callback == NOT_SCHEDULED) | |
929 | readchar_callback = append_callback_event (process_remaining, NULL); | |
c906108c SS |
930 | } |
931 | ||
932 | /* Read a packet from the remote machine, with error checking, | |
933 | and store it in BUF. Returns length of packet, or negative if error. */ | |
934 | ||
935 | int | |
fba45db2 | 936 | getpkt (char *buf) |
c906108c SS |
937 | { |
938 | char *bp; | |
939 | unsigned char csum, c1, c2; | |
940 | int c; | |
941 | ||
942 | while (1) | |
943 | { | |
944 | csum = 0; | |
945 | ||
946 | while (1) | |
947 | { | |
948 | c = readchar (); | |
949 | if (c == '$') | |
950 | break; | |
951 | if (remote_debug) | |
0d62e5e8 DJ |
952 | { |
953 | fprintf (stderr, "[getpkt: discarding char '%c']\n", c); | |
954 | fflush (stderr); | |
955 | } | |
956 | ||
c906108c SS |
957 | if (c < 0) |
958 | return -1; | |
959 | } | |
960 | ||
961 | bp = buf; | |
962 | while (1) | |
963 | { | |
964 | c = readchar (); | |
965 | if (c < 0) | |
966 | return -1; | |
967 | if (c == '#') | |
968 | break; | |
969 | *bp++ = c; | |
970 | csum += c; | |
971 | } | |
972 | *bp = 0; | |
973 | ||
974 | c1 = fromhex (readchar ()); | |
975 | c2 = fromhex (readchar ()); | |
c5aa993b | 976 | |
c906108c SS |
977 | if (csum == (c1 << 4) + c2) |
978 | break; | |
979 | ||
a6f3e723 SL |
980 | if (noack_mode) |
981 | { | |
493e2a69 MS |
982 | fprintf (stderr, |
983 | "Bad checksum, sentsum=0x%x, csum=0x%x, " | |
984 | "buf=%s [no-ack-mode, Bad medium?]\n", | |
a6f3e723 SL |
985 | (c1 << 4) + c2, csum, buf); |
986 | /* Not much we can do, GDB wasn't expecting an ack/nac. */ | |
987 | break; | |
988 | } | |
989 | ||
c906108c SS |
990 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", |
991 | (c1 << 4) + c2, csum, buf); | |
e0f9f062 | 992 | if (write_prim ("-", 1) != 1) |
e581f2b4 | 993 | return -1; |
c906108c SS |
994 | } |
995 | ||
a6f3e723 | 996 | if (!noack_mode) |
0d62e5e8 | 997 | { |
a6f3e723 SL |
998 | if (remote_debug) |
999 | { | |
1000 | fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf); | |
1001 | fflush (stderr); | |
1002 | } | |
c906108c | 1003 | |
e0f9f062 | 1004 | if (write_prim ("+", 1) != 1) |
e581f2b4 | 1005 | return -1; |
c906108c | 1006 | |
a6f3e723 SL |
1007 | if (remote_debug) |
1008 | { | |
1009 | fprintf (stderr, "[sent ack]\n"); | |
1010 | fflush (stderr); | |
1011 | } | |
0d62e5e8 | 1012 | } |
86b1f9c5 PM |
1013 | else |
1014 | { | |
1015 | if (remote_debug) | |
1016 | { | |
1017 | fprintf (stderr, "getpkt (\"%s\"); [no ack sent] \n", buf); | |
1018 | fflush (stderr); | |
1019 | } | |
1020 | } | |
0d62e5e8 | 1021 | |
c906108c SS |
1022 | return bp - buf; |
1023 | } | |
1024 | ||
1025 | void | |
fba45db2 | 1026 | write_ok (char *buf) |
c906108c SS |
1027 | { |
1028 | buf[0] = 'O'; | |
1029 | buf[1] = 'K'; | |
1030 | buf[2] = '\0'; | |
1031 | } | |
1032 | ||
1033 | void | |
fba45db2 | 1034 | write_enn (char *buf) |
c906108c | 1035 | { |
c89dc5d4 | 1036 | /* Some day, we should define the meanings of the error codes... */ |
c906108c | 1037 | buf[0] = 'E'; |
c89dc5d4 DJ |
1038 | buf[1] = '0'; |
1039 | buf[2] = '1'; | |
c906108c SS |
1040 | buf[3] = '\0'; |
1041 | } | |
1042 | ||
0fb4aa4b PA |
1043 | #endif |
1044 | ||
0fb4aa4b | 1045 | #ifndef IN_PROCESS_AGENT |
c906108c | 1046 | |
c906108c | 1047 | static char * |
442ea881 | 1048 | outreg (struct regcache *regcache, int regno, char *buf) |
c906108c | 1049 | { |
5c44784c JM |
1050 | if ((regno >> 12) != 0) |
1051 | *buf++ = tohex ((regno >> 12) & 0xf); | |
1052 | if ((regno >> 8) != 0) | |
1053 | *buf++ = tohex ((regno >> 8) & 0xf); | |
1054 | *buf++ = tohex ((regno >> 4) & 0xf); | |
c906108c SS |
1055 | *buf++ = tohex (regno & 0xf); |
1056 | *buf++ = ':'; | |
442ea881 | 1057 | collect_register_as_string (regcache, regno, buf); |
3aee8918 | 1058 | buf += 2 * register_size (regcache->tdesc, regno); |
c906108c SS |
1059 | *buf++ = ';'; |
1060 | ||
1061 | return buf; | |
1062 | } | |
1063 | ||
0d62e5e8 DJ |
1064 | void |
1065 | new_thread_notify (int id) | |
1066 | { | |
1067 | char own_buf[256]; | |
1068 | ||
1069 | /* The `n' response is not yet part of the remote protocol. Do nothing. */ | |
1070 | if (1) | |
1071 | return; | |
1072 | ||
1073 | if (server_waiting == 0) | |
1074 | return; | |
1075 | ||
1076 | sprintf (own_buf, "n%x", id); | |
1077 | disable_async_io (); | |
1078 | putpkt (own_buf); | |
1079 | enable_async_io (); | |
1080 | } | |
1081 | ||
1082 | void | |
1083 | dead_thread_notify (int id) | |
1084 | { | |
1085 | char own_buf[256]; | |
1086 | ||
1087 | /* The `x' response is not yet part of the remote protocol. Do nothing. */ | |
1088 | if (1) | |
1089 | return; | |
1090 | ||
1091 | sprintf (own_buf, "x%x", id); | |
1092 | disable_async_io (); | |
1093 | putpkt (own_buf); | |
1094 | enable_async_io (); | |
1095 | } | |
1096 | ||
c906108c | 1097 | void |
95954743 | 1098 | prepare_resume_reply (char *buf, ptid_t ptid, |
5b1c542e | 1099 | struct target_waitstatus *status) |
c906108c | 1100 | { |
5b1c542e | 1101 | if (debug_threads) |
87ce2a04 DE |
1102 | debug_printf ("Writing resume reply for %s:%d\n", |
1103 | target_pid_to_str (ptid), status->kind); | |
c906108c | 1104 | |
5b1c542e | 1105 | switch (status->kind) |
c906108c | 1106 | { |
5b1c542e PA |
1107 | case TARGET_WAITKIND_STOPPED: |
1108 | { | |
0bfdf32f | 1109 | struct thread_info *saved_thread; |
5b1c542e | 1110 | const char **regp; |
442ea881 | 1111 | struct regcache *regcache; |
e013ee27 | 1112 | |
5b1c542e PA |
1113 | sprintf (buf, "T%02x", status->value.sig); |
1114 | buf += strlen (buf); | |
e013ee27 | 1115 | |
0bfdf32f | 1116 | saved_thread = current_thread; |
e013ee27 | 1117 | |
0bfdf32f | 1118 | current_thread = find_thread_ptid (ptid); |
e013ee27 | 1119 | |
3aee8918 PA |
1120 | regp = current_target_desc ()->expedite_regs; |
1121 | ||
0bfdf32f | 1122 | regcache = get_thread_regcache (current_thread, 1); |
442ea881 | 1123 | |
5b1c542e PA |
1124 | if (the_target->stopped_by_watchpoint != NULL |
1125 | && (*the_target->stopped_by_watchpoint) ()) | |
1126 | { | |
1127 | CORE_ADDR addr; | |
1128 | int i; | |
c906108c | 1129 | |
5b1c542e PA |
1130 | strncpy (buf, "watch:", 6); |
1131 | buf += 6; | |
0d62e5e8 | 1132 | |
5b1c542e | 1133 | addr = (*the_target->stopped_data_address) (); |
255e7678 | 1134 | |
5b1c542e PA |
1135 | /* Convert each byte of the address into two hexadecimal |
1136 | chars. Note that we take sizeof (void *) instead of | |
1137 | sizeof (addr); this is to avoid sending a 64-bit | |
1138 | address to a 32-bit GDB. */ | |
1139 | for (i = sizeof (void *) * 2; i > 0; i--) | |
1140 | *buf++ = tohex ((addr >> (i - 1) * 4) & 0xf); | |
1141 | *buf++ = ';'; | |
1142 | } | |
1143 | ||
1144 | while (*regp) | |
1145 | { | |
3aee8918 | 1146 | buf = outreg (regcache, find_regno (regcache->tdesc, *regp), buf); |
5b1c542e PA |
1147 | regp ++; |
1148 | } | |
5472f405 | 1149 | *buf = '\0'; |
5b1c542e PA |
1150 | |
1151 | /* Formerly, if the debugger had not used any thread features | |
1152 | we would not burden it with a thread status response. This | |
1153 | was for the benefit of GDB 4.13 and older. However, in | |
1154 | recent GDB versions the check (``if (cont_thread != 0)'') | |
1155 | does not have the desired effect because of sillyness in | |
1156 | the way that the remote protocol handles specifying a | |
1157 | thread. Since thread support relies on qSymbol support | |
1158 | anyway, assume GDB can handle threads. */ | |
1159 | ||
1160 | if (using_threads && !disable_packet_Tthread) | |
1161 | { | |
1162 | /* This if (1) ought to be unnecessary. But remote_wait | |
1163 | in GDB will claim this event belongs to inferior_ptid | |
1164 | if we do not specify a thread, and there's no way for | |
1165 | gdbserver to know what inferior_ptid is. */ | |
95954743 | 1166 | if (1 || !ptid_equal (general_thread, ptid)) |
5b1c542e | 1167 | { |
dc146f7c | 1168 | int core = -1; |
bd99dc85 PA |
1169 | /* In non-stop, don't change the general thread behind |
1170 | GDB's back. */ | |
1171 | if (!non_stop) | |
1172 | general_thread = ptid; | |
95954743 PA |
1173 | sprintf (buf, "thread:"); |
1174 | buf += strlen (buf); | |
1175 | buf = write_ptid (buf, ptid); | |
1176 | strcat (buf, ";"); | |
5b1c542e | 1177 | buf += strlen (buf); |
dc146f7c | 1178 | |
3e10640f YQ |
1179 | core = target_core_of_thread (ptid); |
1180 | ||
dc146f7c VP |
1181 | if (core != -1) |
1182 | { | |
1183 | sprintf (buf, "core:"); | |
1184 | buf += strlen (buf); | |
1185 | sprintf (buf, "%x", core); | |
1186 | strcat (buf, ";"); | |
1187 | buf += strlen (buf); | |
1188 | } | |
5b1c542e PA |
1189 | } |
1190 | } | |
1191 | ||
1192 | if (dlls_changed) | |
1193 | { | |
1194 | strcpy (buf, "library:;"); | |
1195 | buf += strlen (buf); | |
1196 | dlls_changed = 0; | |
1197 | } | |
1198 | ||
0bfdf32f | 1199 | current_thread = saved_thread; |
5b1c542e PA |
1200 | } |
1201 | break; | |
1202 | case TARGET_WAITKIND_EXITED: | |
95954743 PA |
1203 | if (multi_process) |
1204 | sprintf (buf, "W%x;process:%x", | |
1205 | status->value.integer, ptid_get_pid (ptid)); | |
1206 | else | |
1207 | sprintf (buf, "W%02x", status->value.integer); | |
5b1c542e PA |
1208 | break; |
1209 | case TARGET_WAITKIND_SIGNALLED: | |
95954743 PA |
1210 | if (multi_process) |
1211 | sprintf (buf, "X%x;process:%x", | |
1212 | status->value.sig, ptid_get_pid (ptid)); | |
1213 | else | |
1214 | sprintf (buf, "X%02x", status->value.sig); | |
5b1c542e PA |
1215 | break; |
1216 | default: | |
1217 | error ("unhandled waitkind"); | |
1218 | break; | |
c906108c | 1219 | } |
c906108c SS |
1220 | } |
1221 | ||
1222 | void | |
fba45db2 | 1223 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
c906108c SS |
1224 | { |
1225 | int i = 0, j = 0; | |
1226 | char ch; | |
1227 | *mem_addr_ptr = *len_ptr = 0; | |
1228 | ||
1229 | while ((ch = from[i++]) != ',') | |
1230 | { | |
1231 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1232 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1233 | } | |
1234 | ||
1235 | for (j = 0; j < 4; j++) | |
1236 | { | |
1237 | if ((ch = from[i++]) == 0) | |
1238 | break; | |
1239 | *len_ptr = *len_ptr << 4; | |
1240 | *len_ptr |= fromhex (ch) & 0x0f; | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | void | |
fba45db2 | 1245 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
fa593d66 | 1246 | unsigned char **to_p) |
c906108c SS |
1247 | { |
1248 | int i = 0; | |
1249 | char ch; | |
1250 | *mem_addr_ptr = *len_ptr = 0; | |
1251 | ||
1252 | while ((ch = from[i++]) != ',') | |
1253 | { | |
1254 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1255 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1256 | } | |
1257 | ||
1258 | while ((ch = from[i++]) != ':') | |
1259 | { | |
1260 | *len_ptr = *len_ptr << 4; | |
1261 | *len_ptr |= fromhex (ch) & 0x0f; | |
1262 | } | |
1263 | ||
fa593d66 PA |
1264 | if (*to_p == NULL) |
1265 | *to_p = xmalloc (*len_ptr); | |
1266 | ||
a7191e8b | 1267 | hex2bin (&from[i++], *to_p, *len_ptr); |
c906108c | 1268 | } |
2f2893d9 | 1269 | |
01f9e8fa DJ |
1270 | int |
1271 | decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr, | |
fa593d66 | 1272 | unsigned int *len_ptr, unsigned char **to_p) |
01f9e8fa DJ |
1273 | { |
1274 | int i = 0; | |
1275 | char ch; | |
1276 | *mem_addr_ptr = *len_ptr = 0; | |
1277 | ||
1278 | while ((ch = from[i++]) != ',') | |
1279 | { | |
1280 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1281 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1282 | } | |
1283 | ||
1284 | while ((ch = from[i++]) != ':') | |
1285 | { | |
1286 | *len_ptr = *len_ptr << 4; | |
1287 | *len_ptr |= fromhex (ch) & 0x0f; | |
1288 | } | |
1289 | ||
fa593d66 PA |
1290 | if (*to_p == NULL) |
1291 | *to_p = xmalloc (*len_ptr); | |
1292 | ||
01f9e8fa | 1293 | if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i, |
fa593d66 | 1294 | *to_p, *len_ptr) != *len_ptr) |
01f9e8fa DJ |
1295 | return -1; |
1296 | ||
1297 | return 0; | |
1298 | } | |
1299 | ||
0e7f50da | 1300 | /* Decode a qXfer write request. */ |
d08aafef | 1301 | |
0e7f50da | 1302 | int |
d08aafef | 1303 | decode_xfer_write (char *buf, int packet_len, CORE_ADDR *offset, |
0e7f50da UW |
1304 | unsigned int *len, unsigned char *data) |
1305 | { | |
1306 | char ch; | |
d08aafef | 1307 | char *b = buf; |
0e7f50da UW |
1308 | |
1309 | /* Extract the offset. */ | |
1310 | *offset = 0; | |
1311 | while ((ch = *buf++) != ':') | |
1312 | { | |
1313 | *offset = *offset << 4; | |
1314 | *offset |= fromhex (ch) & 0x0f; | |
1315 | } | |
1316 | ||
1317 | /* Get encoded data. */ | |
d08aafef | 1318 | packet_len -= buf - b; |
0e7f50da UW |
1319 | *len = remote_unescape_input ((const gdb_byte *) buf, packet_len, |
1320 | data, packet_len); | |
1321 | return 0; | |
1322 | } | |
1323 | ||
08388c79 DE |
1324 | /* Decode the parameters of a qSearch:memory packet. */ |
1325 | ||
1326 | int | |
1327 | decode_search_memory_packet (const char *buf, int packet_len, | |
1328 | CORE_ADDR *start_addrp, | |
1329 | CORE_ADDR *search_space_lenp, | |
1330 | gdb_byte *pattern, unsigned int *pattern_lenp) | |
1331 | { | |
1332 | const char *p = buf; | |
1333 | ||
1334 | p = decode_address_to_semicolon (start_addrp, p); | |
1335 | p = decode_address_to_semicolon (search_space_lenp, p); | |
1336 | packet_len -= p - buf; | |
1337 | *pattern_lenp = remote_unescape_input ((const gdb_byte *) p, packet_len, | |
1338 | pattern, packet_len); | |
1339 | return 0; | |
1340 | } | |
1341 | ||
95954743 PA |
1342 | static void |
1343 | free_sym_cache (struct sym_cache *sym) | |
1344 | { | |
1345 | if (sym != NULL) | |
1346 | { | |
1347 | free (sym->name); | |
1348 | free (sym); | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | void | |
1353 | clear_symbol_cache (struct sym_cache **symcache_p) | |
1354 | { | |
1355 | struct sym_cache *sym, *next; | |
1356 | ||
1357 | /* Check the cache first. */ | |
1358 | for (sym = *symcache_p; sym; sym = next) | |
1359 | { | |
1360 | next = sym->next; | |
1361 | free_sym_cache (sym); | |
1362 | } | |
1363 | ||
1364 | *symcache_p = NULL; | |
1365 | } | |
1366 | ||
9836d6ea PA |
1367 | /* Get the address of NAME, and return it in ADDRP if found. if |
1368 | MAY_ASK_GDB is false, assume symbol cache misses are failures. | |
fd500816 DJ |
1369 | Returns 1 if the symbol is found, 0 if it is not, -1 on error. */ |
1370 | ||
2f2893d9 | 1371 | int |
9836d6ea | 1372 | look_up_one_symbol (const char *name, CORE_ADDR *addrp, int may_ask_gdb) |
2f2893d9 DJ |
1373 | { |
1374 | char own_buf[266], *p, *q; | |
1375 | int len; | |
fd500816 | 1376 | struct sym_cache *sym; |
95954743 PA |
1377 | struct process_info *proc; |
1378 | ||
1379 | proc = current_process (); | |
fd500816 DJ |
1380 | |
1381 | /* Check the cache first. */ | |
95954743 | 1382 | for (sym = proc->symbol_cache; sym; sym = sym->next) |
fd500816 DJ |
1383 | if (strcmp (name, sym->name) == 0) |
1384 | { | |
1385 | *addrp = sym->addr; | |
1386 | return 1; | |
1387 | } | |
2f2893d9 | 1388 | |
9836d6ea PA |
1389 | /* It might not be an appropriate time to look up a symbol, |
1390 | e.g. while we're trying to fetch registers. */ | |
1391 | if (!may_ask_gdb) | |
ea025f5f DJ |
1392 | return 0; |
1393 | ||
2f2893d9 DJ |
1394 | /* Send the request. */ |
1395 | strcpy (own_buf, "qSymbol:"); | |
971dc0b8 TT |
1396 | bin2hex ((const gdb_byte *) name, own_buf + strlen ("qSymbol:"), |
1397 | strlen (name)); | |
2f2893d9 DJ |
1398 | if (putpkt (own_buf) < 0) |
1399 | return -1; | |
1400 | ||
1401 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
1402 | len = getpkt (own_buf); | |
1403 | if (len < 0) | |
1404 | return -1; | |
1405 | ||
2bbe3cc1 DJ |
1406 | /* We ought to handle pretty much any packet at this point while we |
1407 | wait for the qSymbol "response". That requires re-entering the | |
1408 | main loop. For now, this is an adequate approximation; allow | |
1409 | GDB to read from memory while it figures out the address of the | |
1410 | symbol. */ | |
1411 | while (own_buf[0] == 'm') | |
1412 | { | |
1413 | CORE_ADDR mem_addr; | |
1414 | unsigned char *mem_buf; | |
1415 | unsigned int mem_len; | |
1416 | ||
1417 | decode_m_packet (&own_buf[1], &mem_addr, &mem_len); | |
bca929d3 | 1418 | mem_buf = xmalloc (mem_len); |
2bbe3cc1 | 1419 | if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0) |
e9371aff | 1420 | bin2hex (mem_buf, own_buf, mem_len); |
2bbe3cc1 DJ |
1421 | else |
1422 | write_enn (own_buf); | |
1423 | free (mem_buf); | |
1424 | if (putpkt (own_buf) < 0) | |
1425 | return -1; | |
1426 | len = getpkt (own_buf); | |
1427 | if (len < 0) | |
1428 | return -1; | |
1429 | } | |
1b3f6016 | 1430 | |
2f2893d9 DJ |
1431 | if (strncmp (own_buf, "qSymbol:", strlen ("qSymbol:")) != 0) |
1432 | { | |
2bbe3cc1 | 1433 | warning ("Malformed response to qSymbol, ignoring: %s\n", own_buf); |
2f2893d9 DJ |
1434 | return -1; |
1435 | } | |
1436 | ||
1437 | p = own_buf + strlen ("qSymbol:"); | |
1438 | q = p; | |
1439 | while (*q && *q != ':') | |
1440 | q++; | |
1441 | ||
1442 | /* Make sure we found a value for the symbol. */ | |
1443 | if (p == q || *q == '\0') | |
1444 | return 0; | |
1445 | ||
1446 | decode_address (addrp, p, q - p); | |
fd500816 DJ |
1447 | |
1448 | /* Save the symbol in our cache. */ | |
bca929d3 DE |
1449 | sym = xmalloc (sizeof (*sym)); |
1450 | sym->name = xstrdup (name); | |
fd500816 | 1451 | sym->addr = *addrp; |
95954743 PA |
1452 | sym->next = proc->symbol_cache; |
1453 | proc->symbol_cache = sym; | |
fd500816 | 1454 | |
2f2893d9 DJ |
1455 | return 1; |
1456 | } | |
c74d0ad8 | 1457 | |
fa593d66 PA |
1458 | /* Relocate an instruction to execute at a different address. OLDLOC |
1459 | is the address in the inferior memory where the instruction to | |
1460 | relocate is currently at. On input, TO points to the destination | |
1461 | where we want the instruction to be copied (and possibly adjusted) | |
1462 | to. On output, it points to one past the end of the resulting | |
1463 | instruction(s). The effect of executing the instruction at TO | |
86a30030 | 1464 | shall be the same as if executing it at OLDLOC. For example, call |
fa593d66 PA |
1465 | instructions that implicitly push the return address on the stack |
1466 | should be adjusted to return to the instruction after OLDLOC; | |
1467 | relative branches, and other PC-relative instructions need the | |
1468 | offset adjusted; etc. Returns 0 on success, -1 on failure. */ | |
1469 | ||
1470 | int | |
1471 | relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc) | |
1472 | { | |
1473 | char own_buf[266]; | |
1474 | int len; | |
1475 | ULONGEST written = 0; | |
1476 | ||
1477 | /* Send the request. */ | |
1478 | strcpy (own_buf, "qRelocInsn:"); | |
1479 | sprintf (own_buf, "qRelocInsn:%s;%s", paddress (oldloc), | |
1480 | paddress (*to)); | |
1481 | if (putpkt (own_buf) < 0) | |
1482 | return -1; | |
1483 | ||
1484 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
1485 | len = getpkt (own_buf); | |
1486 | if (len < 0) | |
1487 | return -1; | |
1488 | ||
1489 | /* We ought to handle pretty much any packet at this point while we | |
1490 | wait for the qRelocInsn "response". That requires re-entering | |
1491 | the main loop. For now, this is an adequate approximation; allow | |
1492 | GDB to access memory. */ | |
1493 | while (own_buf[0] == 'm' || own_buf[0] == 'M' || own_buf[0] == 'X') | |
1494 | { | |
1495 | CORE_ADDR mem_addr; | |
1496 | unsigned char *mem_buf = NULL; | |
1497 | unsigned int mem_len; | |
1498 | ||
1499 | if (own_buf[0] == 'm') | |
1500 | { | |
1501 | decode_m_packet (&own_buf[1], &mem_addr, &mem_len); | |
1502 | mem_buf = xmalloc (mem_len); | |
1503 | if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0) | |
e9371aff | 1504 | bin2hex (mem_buf, own_buf, mem_len); |
fa593d66 PA |
1505 | else |
1506 | write_enn (own_buf); | |
1507 | } | |
1508 | else if (own_buf[0] == 'X') | |
1509 | { | |
1510 | if (decode_X_packet (&own_buf[1], len - 1, &mem_addr, | |
1511 | &mem_len, &mem_buf) < 0 | |
1512 | || write_inferior_memory (mem_addr, mem_buf, mem_len) != 0) | |
1513 | write_enn (own_buf); | |
1514 | else | |
1515 | write_ok (own_buf); | |
1516 | } | |
1517 | else | |
1518 | { | |
1519 | decode_M_packet (&own_buf[1], &mem_addr, &mem_len, &mem_buf); | |
1520 | if (write_inferior_memory (mem_addr, mem_buf, mem_len) == 0) | |
1521 | write_ok (own_buf); | |
1522 | else | |
1523 | write_enn (own_buf); | |
1524 | } | |
1525 | free (mem_buf); | |
1526 | if (putpkt (own_buf) < 0) | |
1527 | return -1; | |
1528 | len = getpkt (own_buf); | |
1529 | if (len < 0) | |
1530 | return -1; | |
1531 | } | |
1532 | ||
1533 | if (own_buf[0] == 'E') | |
1534 | { | |
1535 | warning ("An error occurred while relocating an instruction: %s\n", | |
1536 | own_buf); | |
1537 | return -1; | |
1538 | } | |
1539 | ||
1540 | if (strncmp (own_buf, "qRelocInsn:", strlen ("qRelocInsn:")) != 0) | |
1541 | { | |
1542 | warning ("Malformed response to qRelocInsn, ignoring: %s\n", | |
1543 | own_buf); | |
1544 | return -1; | |
1545 | } | |
1546 | ||
1547 | unpack_varlen_hex (own_buf + strlen ("qRelocInsn:"), &written); | |
1548 | ||
1549 | *to += written; | |
1550 | return 0; | |
1551 | } | |
1552 | ||
c74d0ad8 | 1553 | void |
bce7165d | 1554 | monitor_output (const char *msg) |
c74d0ad8 | 1555 | { |
0a822afb TT |
1556 | int len = strlen (msg); |
1557 | char *buf = xmalloc (len * 2 + 2); | |
c74d0ad8 DJ |
1558 | |
1559 | buf[0] = 'O'; | |
971dc0b8 | 1560 | bin2hex ((const gdb_byte *) msg, buf + 1, len); |
c74d0ad8 DJ |
1561 | |
1562 | putpkt (buf); | |
1563 | free (buf); | |
1564 | } | |
255e7678 | 1565 | |
0fb4aa4b | 1566 | #endif |