Commit | Line | Data |
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c906108c | 1 | /* Remote utility routines for the remote server for GDB. |
e2882c85 | 2 | Copyright (C) 1986-2018 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" | |
726e1356 PA |
20 | #if HAVE_TERMIOS_H |
21 | #include <termios.h> | |
22 | #endif | |
5b1c542e | 23 | #include "target.h" |
623b6bdf | 24 | #include "gdbthread.h" |
3aee8918 | 25 | #include "tdesc.h" |
799cdc37 | 26 | #include "dll.h" |
9c3d6531 | 27 | #include "rsp-low.h" |
75352e28 | 28 | #include "gdbthread.h" |
fafcc06a | 29 | #include <ctype.h> |
b80864fb | 30 | #if HAVE_SYS_IOCTL_H |
c906108c | 31 | #include <sys/ioctl.h> |
b80864fb | 32 | #endif |
68070c10 | 33 | #if HAVE_SYS_FILE_H |
c906108c | 34 | #include <sys/file.h> |
68070c10 | 35 | #endif |
9eb1356e PA |
36 | #if HAVE_NETINET_IN_H |
37 | #include <netinet/in.h> | |
38 | #endif | |
39 | #if HAVE_SYS_SOCKET_H | |
40 | #include <sys/socket.h> | |
41 | #endif | |
b80864fb | 42 | #if HAVE_NETDB_H |
c906108c | 43 | #include <netdb.h> |
b80864fb DJ |
44 | #endif |
45 | #if HAVE_NETINET_TCP_H | |
c906108c | 46 | #include <netinet/tcp.h> |
b80864fb DJ |
47 | #endif |
48 | #if HAVE_SYS_IOCTL_H | |
c906108c | 49 | #include <sys/ioctl.h> |
b80864fb | 50 | #endif |
68070c10 | 51 | #if HAVE_SIGNAL_H |
c906108c | 52 | #include <signal.h> |
68070c10 PA |
53 | #endif |
54 | #if HAVE_FCNTL_H | |
c906108c | 55 | #include <fcntl.h> |
68070c10 | 56 | #endif |
438e1e42 | 57 | #include "gdb_sys_time.h" |
cf30a8e1 | 58 | #include <unistd.h> |
b80864fb | 59 | #if HAVE_ARPA_INET_H |
0729219d | 60 | #include <arpa/inet.h> |
b80864fb | 61 | #endif |
53ce3c39 | 62 | #include <sys/stat.h> |
9eb1356e PA |
63 | |
64 | #if USE_WIN32API | |
65 | #include <winsock2.h> | |
66 | #endif | |
c906108c | 67 | |
ac8c974e AR |
68 | #if __QNX__ |
69 | #include <sys/iomgr.h> | |
70 | #endif /* __QNX__ */ | |
71 | ||
f450004a DJ |
72 | #ifndef HAVE_SOCKLEN_T |
73 | typedef int socklen_t; | |
74 | #endif | |
75 | ||
0fb4aa4b PA |
76 | #ifndef IN_PROCESS_AGENT |
77 | ||
7390519e PA |
78 | #if USE_WIN32API |
79 | # define INVALID_DESCRIPTOR INVALID_SOCKET | |
80 | #else | |
81 | # define INVALID_DESCRIPTOR -1 | |
82 | #endif | |
83 | ||
24b066ba DE |
84 | /* Extra value for readchar_callback. */ |
85 | enum { | |
86 | /* The callback is currently not scheduled. */ | |
87 | NOT_SCHEDULED = -1 | |
88 | }; | |
89 | ||
90 | /* Status of the readchar callback. | |
91 | Either NOT_SCHEDULED or the callback id. */ | |
92 | static int readchar_callback = NOT_SCHEDULED; | |
93 | ||
bc3b5632 | 94 | static int readchar (void); |
24b066ba DE |
95 | static void reset_readchar (void); |
96 | static void reschedule (void); | |
bc3b5632 | 97 | |
fd500816 DJ |
98 | /* A cache entry for a successfully looked-up symbol. */ |
99 | struct sym_cache | |
100 | { | |
95954743 | 101 | char *name; |
fd500816 DJ |
102 | CORE_ADDR addr; |
103 | struct sym_cache *next; | |
104 | }; | |
105 | ||
c906108c | 106 | int remote_debug = 0; |
03863182 | 107 | struct ui_file *gdb_stdlog; |
c906108c | 108 | |
e0f9f062 DE |
109 | static int remote_is_stdio = 0; |
110 | ||
ec48365d PA |
111 | static gdb_fildes_t remote_desc = INVALID_DESCRIPTOR; |
112 | static gdb_fildes_t listen_desc = INVALID_DESCRIPTOR; | |
c906108c | 113 | |
0d62e5e8 DJ |
114 | /* FIXME headerize? */ |
115 | extern int using_threads; | |
116 | extern int debug_threads; | |
117 | ||
a6f3e723 SL |
118 | /* If true, then GDB has requested noack mode. */ |
119 | int noack_mode = 0; | |
120 | /* If true, then we tell GDB to use noack mode by default. */ | |
121 | int transport_is_reliable = 0; | |
122 | ||
0f48aa01 | 123 | #ifdef USE_WIN32API |
68070c10 PA |
124 | # define read(fd, buf, len) recv (fd, (char *) buf, len, 0) |
125 | # define write(fd, buf, len) send (fd, (char *) buf, len, 0) | |
0f48aa01 DJ |
126 | #endif |
127 | ||
8336d594 PA |
128 | int |
129 | gdb_connected (void) | |
130 | { | |
131 | return remote_desc != INVALID_DESCRIPTOR; | |
132 | } | |
133 | ||
e0f9f062 DE |
134 | /* Return true if the remote connection is over stdio. */ |
135 | ||
136 | int | |
137 | remote_connection_is_stdio (void) | |
138 | { | |
139 | return remote_is_stdio; | |
140 | } | |
141 | ||
8336d594 PA |
142 | static void |
143 | enable_async_notification (int fd) | |
144 | { | |
145 | #if defined(F_SETFL) && defined (FASYNC) | |
146 | int save_fcntl_flags; | |
147 | ||
148 | save_fcntl_flags = fcntl (fd, F_GETFL, 0); | |
149 | fcntl (fd, F_SETFL, save_fcntl_flags | FASYNC); | |
150 | #if defined (F_SETOWN) | |
151 | fcntl (fd, F_SETOWN, getpid ()); | |
152 | #endif | |
153 | #endif | |
154 | } | |
155 | ||
156 | static int | |
157 | handle_accept_event (int err, gdb_client_data client_data) | |
158 | { | |
9eb1356e | 159 | struct sockaddr_in sockaddr; |
8336d594 PA |
160 | socklen_t tmp; |
161 | ||
162 | if (debug_threads) | |
87ce2a04 | 163 | debug_printf ("handling possible accept event\n"); |
8336d594 | 164 | |
9eb1356e PA |
165 | tmp = sizeof (sockaddr); |
166 | remote_desc = accept (listen_desc, (struct sockaddr *) &sockaddr, &tmp); | |
8336d594 PA |
167 | if (remote_desc == -1) |
168 | perror_with_name ("Accept failed"); | |
169 | ||
170 | /* Enable TCP keep alive process. */ | |
171 | tmp = 1; | |
172 | setsockopt (remote_desc, SOL_SOCKET, SO_KEEPALIVE, | |
173 | (char *) &tmp, sizeof (tmp)); | |
174 | ||
175 | /* Tell TCP not to delay small packets. This greatly speeds up | |
176 | interactive response. */ | |
177 | tmp = 1; | |
178 | setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY, | |
179 | (char *) &tmp, sizeof (tmp)); | |
180 | ||
181 | #ifndef USE_WIN32API | |
8336d594 PA |
182 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply |
183 | exits when the remote side dies. */ | |
03f2bd59 JK |
184 | #endif |
185 | ||
186 | if (run_once) | |
187 | { | |
188 | #ifndef USE_WIN32API | |
189 | close (listen_desc); /* No longer need this */ | |
8336d594 | 190 | #else |
03f2bd59 | 191 | closesocket (listen_desc); /* No longer need this */ |
8336d594 | 192 | #endif |
03f2bd59 | 193 | } |
8336d594 | 194 | |
03f2bd59 JK |
195 | /* Even if !RUN_ONCE no longer notice new connections. Still keep the |
196 | descriptor open for add_file_handler to wait for a new connection. */ | |
8336d594 PA |
197 | delete_file_handler (listen_desc); |
198 | ||
199 | /* Convert IP address to string. */ | |
200 | fprintf (stderr, "Remote debugging from host %s\n", | |
9eb1356e | 201 | inet_ntoa (sockaddr.sin_addr)); |
8336d594 PA |
202 | |
203 | enable_async_notification (remote_desc); | |
204 | ||
205 | /* Register the event loop handler. */ | |
206 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
207 | ||
208 | /* We have a new GDB connection now. If we were disconnected | |
209 | tracing, there's a window where the target could report a stop | |
210 | event to the event loop, and since we have a connection now, we'd | |
211 | try to send vStopped notifications to GDB. But, don't do that | |
212 | until GDB as selected all-stop/non-stop, and has queried the | |
213 | threads' status ('?'). */ | |
214 | target_async (0); | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
03f2bd59 JK |
219 | /* Prepare for a later connection to a remote debugger. |
220 | NAME is the filename used for communication. */ | |
221 | ||
222 | void | |
fb32b4f7 | 223 | remote_prepare (const char *name) |
03f2bd59 | 224 | { |
fb32b4f7 | 225 | const char *port_str; |
03f2bd59 JK |
226 | #ifdef USE_WIN32API |
227 | static int winsock_initialized; | |
228 | #endif | |
229 | int port; | |
9eb1356e | 230 | struct sockaddr_in sockaddr; |
03f2bd59 JK |
231 | socklen_t tmp; |
232 | char *port_end; | |
233 | ||
e0f9f062 DE |
234 | remote_is_stdio = 0; |
235 | if (strcmp (name, STDIO_CONNECTION_NAME) == 0) | |
236 | { | |
237 | /* We need to record fact that we're using stdio sooner than the | |
238 | call to remote_open so start_inferior knows the connection is | |
239 | via stdio. */ | |
240 | remote_is_stdio = 1; | |
241 | transport_is_reliable = 1; | |
242 | return; | |
243 | } | |
244 | ||
03f2bd59 JK |
245 | port_str = strchr (name, ':'); |
246 | if (port_str == NULL) | |
247 | { | |
248 | transport_is_reliable = 0; | |
249 | return; | |
250 | } | |
251 | ||
252 | port = strtoul (port_str + 1, &port_end, 10); | |
253 | if (port_str[1] == '\0' || *port_end != '\0') | |
50278d59 | 254 | error ("Bad port argument: %s", name); |
03f2bd59 JK |
255 | |
256 | #ifdef USE_WIN32API | |
257 | if (!winsock_initialized) | |
258 | { | |
259 | WSADATA wsad; | |
260 | ||
261 | WSAStartup (MAKEWORD (1, 0), &wsad); | |
262 | winsock_initialized = 1; | |
263 | } | |
264 | #endif | |
265 | ||
266 | listen_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); | |
267 | if (listen_desc == -1) | |
268 | perror_with_name ("Can't open socket"); | |
269 | ||
270 | /* Allow rapid reuse of this port. */ | |
271 | tmp = 1; | |
272 | setsockopt (listen_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, | |
273 | sizeof (tmp)); | |
274 | ||
9eb1356e PA |
275 | sockaddr.sin_family = PF_INET; |
276 | sockaddr.sin_port = htons (port); | |
277 | sockaddr.sin_addr.s_addr = INADDR_ANY; | |
03f2bd59 | 278 | |
9eb1356e | 279 | if (bind (listen_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
03f2bd59 JK |
280 | || listen (listen_desc, 1)) |
281 | perror_with_name ("Can't bind address"); | |
282 | ||
283 | transport_is_reliable = 1; | |
284 | } | |
285 | ||
c906108c SS |
286 | /* Open a connection to a remote debugger. |
287 | NAME is the filename used for communication. */ | |
288 | ||
289 | void | |
fb32b4f7 | 290 | remote_open (const char *name) |
c906108c | 291 | { |
fb32b4f7 | 292 | const char *port_str; |
8264bb58 DJ |
293 | |
294 | port_str = strchr (name, ':'); | |
e0f9f062 | 295 | #ifdef USE_WIN32API |
8264bb58 | 296 | if (port_str == NULL) |
e0f9f062 DE |
297 | error ("Only <host>:<port> is supported on this platform."); |
298 | #endif | |
299 | ||
300 | if (strcmp (name, STDIO_CONNECTION_NAME) == 0) | |
301 | { | |
302 | fprintf (stderr, "Remote debugging using stdio\n"); | |
303 | ||
304 | /* Use stdin as the handle of the connection. | |
305 | We only select on reads, for example. */ | |
306 | remote_desc = fileno (stdin); | |
307 | ||
308 | enable_async_notification (remote_desc); | |
309 | ||
310 | /* Register the event loop handler. */ | |
311 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
312 | } | |
313 | #ifndef USE_WIN32API | |
314 | else if (port_str == NULL) | |
c906108c | 315 | { |
8264bb58 DJ |
316 | struct stat statbuf; |
317 | ||
318 | if (stat (name, &statbuf) == 0 | |
319 | && (S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode))) | |
320 | remote_desc = open (name, O_RDWR); | |
321 | else | |
322 | { | |
323 | errno = EINVAL; | |
324 | remote_desc = -1; | |
325 | } | |
326 | ||
c906108c SS |
327 | if (remote_desc < 0) |
328 | perror_with_name ("Could not open remote device"); | |
329 | ||
726e1356 | 330 | #if HAVE_TERMIOS_H |
c906108c SS |
331 | { |
332 | struct termios termios; | |
c5aa993b | 333 | tcgetattr (remote_desc, &termios); |
c906108c SS |
334 | |
335 | termios.c_iflag = 0; | |
336 | termios.c_oflag = 0; | |
337 | termios.c_lflag = 0; | |
c5aa993b | 338 | termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 339 | termios.c_cflag |= CLOCAL | CS8; |
d0608e50 | 340 | termios.c_cc[VMIN] = 1; |
c906108c SS |
341 | termios.c_cc[VTIME] = 0; |
342 | ||
c5aa993b | 343 | tcsetattr (remote_desc, TCSANOW, &termios); |
c906108c SS |
344 | } |
345 | #endif | |
346 | ||
e641a1ca | 347 | fprintf (stderr, "Remote debugging using %s\n", name); |
a6f3e723 | 348 | |
8336d594 PA |
349 | enable_async_notification (remote_desc); |
350 | ||
351 | /* Register the event loop handler. */ | |
352 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
c906108c | 353 | } |
e0f9f062 | 354 | #endif /* USE_WIN32API */ |
c906108c SS |
355 | else |
356 | { | |
c906108c | 357 | int port; |
03f2bd59 | 358 | socklen_t len; |
c906108c | 359 | struct sockaddr_in sockaddr; |
c906108c | 360 | |
03f2bd59 JK |
361 | len = sizeof (sockaddr); |
362 | if (getsockname (listen_desc, | |
363 | (struct sockaddr *) &sockaddr, &len) < 0 | |
364 | || len < sizeof (sockaddr)) | |
365 | perror_with_name ("Can't determine port"); | |
366 | port = ntohs (sockaddr.sin_port); | |
6f8486da | 367 | |
6910d122 | 368 | fprintf (stderr, "Listening on port %d\n", port); |
b80864fb | 369 | fflush (stderr); |
6910d122 | 370 | |
8336d594 PA |
371 | /* Register the event loop handler. */ |
372 | add_file_handler (listen_desc, handle_accept_event, NULL); | |
c906108c | 373 | } |
c906108c SS |
374 | } |
375 | ||
376 | void | |
fba45db2 | 377 | remote_close (void) |
c906108c | 378 | { |
bd99dc85 PA |
379 | delete_file_handler (remote_desc); |
380 | ||
e849ea89 | 381 | disable_async_io (); |
8b207339 | 382 | |
b80864fb DJ |
383 | #ifdef USE_WIN32API |
384 | closesocket (remote_desc); | |
385 | #else | |
e0f9f062 DE |
386 | if (! remote_connection_is_stdio ()) |
387 | close (remote_desc); | |
b80864fb | 388 | #endif |
8336d594 | 389 | remote_desc = INVALID_DESCRIPTOR; |
24b066ba DE |
390 | |
391 | reset_readchar (); | |
c906108c SS |
392 | } |
393 | ||
0fb4aa4b PA |
394 | #endif |
395 | ||
0fb4aa4b PA |
396 | #ifndef IN_PROCESS_AGENT |
397 | ||
dae5f5cf | 398 | void |
2f2893d9 DJ |
399 | decode_address (CORE_ADDR *addrp, const char *start, int len) |
400 | { | |
401 | CORE_ADDR addr; | |
402 | char ch; | |
403 | int i; | |
404 | ||
405 | addr = 0; | |
406 | for (i = 0; i < len; i++) | |
407 | { | |
408 | ch = start[i]; | |
409 | addr = addr << 4; | |
410 | addr = addr | (fromhex (ch) & 0x0f); | |
411 | } | |
412 | *addrp = addr; | |
413 | } | |
414 | ||
89be2091 DJ |
415 | const char * |
416 | decode_address_to_semicolon (CORE_ADDR *addrp, const char *start) | |
417 | { | |
418 | const char *end; | |
419 | ||
420 | end = start; | |
421 | while (*end != '\0' && *end != ';') | |
422 | end++; | |
423 | ||
424 | decode_address (addrp, start, end - start); | |
425 | ||
426 | if (*end == ';') | |
427 | end++; | |
428 | return end; | |
429 | } | |
430 | ||
0fb4aa4b PA |
431 | #endif |
432 | ||
0fb4aa4b PA |
433 | #ifndef IN_PROCESS_AGENT |
434 | ||
5ffff7c1 DJ |
435 | /* Look for a sequence of characters which can be run-length encoded. |
436 | If there are any, update *CSUM and *P. Otherwise, output the | |
437 | single character. Return the number of characters consumed. */ | |
438 | ||
439 | static int | |
440 | try_rle (char *buf, int remaining, unsigned char *csum, char **p) | |
441 | { | |
442 | int n; | |
443 | ||
444 | /* Always output the character. */ | |
445 | *csum += buf[0]; | |
446 | *(*p)++ = buf[0]; | |
447 | ||
448 | /* Don't go past '~'. */ | |
449 | if (remaining > 97) | |
450 | remaining = 97; | |
451 | ||
452 | for (n = 1; n < remaining; n++) | |
453 | if (buf[n] != buf[0]) | |
454 | break; | |
455 | ||
456 | /* N is the index of the first character not the same as buf[0]. | |
457 | buf[0] is counted twice, so by decrementing N, we get the number | |
458 | of characters the RLE sequence will replace. */ | |
459 | n--; | |
460 | ||
461 | if (n < 3) | |
462 | return 1; | |
463 | ||
464 | /* Skip the frame characters. The manual says to skip '+' and '-' | |
465 | also, but there's no reason to. Unfortunately these two unusable | |
466 | characters double the encoded length of a four byte zero | |
467 | value. */ | |
468 | while (n + 29 == '$' || n + 29 == '#') | |
469 | n--; | |
470 | ||
471 | *csum += '*'; | |
472 | *(*p)++ = '*'; | |
473 | *csum += n + 29; | |
474 | *(*p)++ = n + 29; | |
475 | ||
476 | return n + 1; | |
477 | } | |
478 | ||
0fb4aa4b PA |
479 | #endif |
480 | ||
0fb4aa4b PA |
481 | #ifndef IN_PROCESS_AGENT |
482 | ||
95954743 PA |
483 | /* Write a PTID to BUF. Returns BUF+CHARACTERS_WRITTEN. */ |
484 | ||
485 | char * | |
486 | write_ptid (char *buf, ptid_t ptid) | |
487 | { | |
488 | int pid, tid; | |
489 | ||
490 | if (multi_process) | |
491 | { | |
492 | pid = ptid_get_pid (ptid); | |
493 | if (pid < 0) | |
494 | buf += sprintf (buf, "p-%x.", -pid); | |
495 | else | |
496 | buf += sprintf (buf, "p%x.", pid); | |
497 | } | |
498 | tid = ptid_get_lwp (ptid); | |
499 | if (tid < 0) | |
500 | buf += sprintf (buf, "-%x", -tid); | |
501 | else | |
502 | buf += sprintf (buf, "%x", tid); | |
503 | ||
504 | return buf; | |
505 | } | |
506 | ||
5b3da067 | 507 | static ULONGEST |
256642e8 | 508 | hex_or_minus_one (const char *buf, const char **obuf) |
95954743 PA |
509 | { |
510 | ULONGEST ret; | |
511 | ||
61012eef | 512 | if (startswith (buf, "-1")) |
95954743 PA |
513 | { |
514 | ret = (ULONGEST) -1; | |
515 | buf += 2; | |
516 | } | |
517 | else | |
518 | buf = unpack_varlen_hex (buf, &ret); | |
519 | ||
520 | if (obuf) | |
521 | *obuf = buf; | |
522 | ||
523 | return ret; | |
524 | } | |
525 | ||
526 | /* Extract a PTID from BUF. If non-null, OBUF is set to the to one | |
527 | passed the last parsed char. Returns null_ptid on error. */ | |
528 | ptid_t | |
256642e8 | 529 | read_ptid (const char *buf, const char **obuf) |
95954743 | 530 | { |
256642e8 PA |
531 | const char *p = buf; |
532 | const char *pp; | |
95954743 PA |
533 | ULONGEST pid = 0, tid = 0; |
534 | ||
535 | if (*p == 'p') | |
536 | { | |
537 | /* Multi-process ptid. */ | |
538 | pp = unpack_varlen_hex (p + 1, &pid); | |
539 | if (*pp != '.') | |
540 | error ("invalid remote ptid: %s\n", p); | |
541 | ||
542 | p = pp + 1; | |
543 | ||
544 | tid = hex_or_minus_one (p, &pp); | |
545 | ||
546 | if (obuf) | |
547 | *obuf = pp; | |
548 | return ptid_build (pid, tid, 0); | |
549 | } | |
550 | ||
551 | /* No multi-process. Just a tid. */ | |
552 | tid = hex_or_minus_one (p, &pp); | |
553 | ||
3d40fbb5 PA |
554 | /* Since GDB is not sending a process id (multi-process extensions |
555 | are off), then there's only one process. Default to the first in | |
556 | the list. */ | |
557 | pid = pid_of (get_first_process ()); | |
95954743 PA |
558 | |
559 | if (obuf) | |
560 | *obuf = pp; | |
561 | return ptid_build (pid, tid, 0); | |
562 | } | |
563 | ||
e0f9f062 DE |
564 | /* Write COUNT bytes in BUF to the client. |
565 | The result is the number of bytes written or -1 if error. | |
566 | This may return less than COUNT. */ | |
567 | ||
568 | static int | |
569 | write_prim (const void *buf, int count) | |
570 | { | |
571 | if (remote_connection_is_stdio ()) | |
572 | return write (fileno (stdout), buf, count); | |
573 | else | |
574 | return write (remote_desc, buf, count); | |
575 | } | |
576 | ||
577 | /* Read COUNT bytes from the client and store in BUF. | |
578 | The result is the number of bytes read or -1 if error. | |
579 | This may return less than COUNT. */ | |
580 | ||
581 | static int | |
582 | read_prim (void *buf, int count) | |
583 | { | |
584 | if (remote_connection_is_stdio ()) | |
585 | return read (fileno (stdin), buf, count); | |
586 | else | |
587 | return read (remote_desc, buf, count); | |
588 | } | |
589 | ||
c906108c | 590 | /* Send a packet to the remote machine, with error checking. |
01f9e8fa DJ |
591 | The data of the packet is in BUF, and the length of the |
592 | packet is in CNT. Returns >= 0 on success, -1 otherwise. */ | |
c906108c | 593 | |
bd99dc85 PA |
594 | static int |
595 | putpkt_binary_1 (char *buf, int cnt, int is_notif) | |
c906108c SS |
596 | { |
597 | int i; | |
598 | unsigned char csum = 0; | |
0a30fbc4 | 599 | char *buf2; |
c906108c | 600 | char *p; |
bc3b5632 | 601 | int cc; |
c906108c | 602 | |
224c3ddb | 603 | buf2 = (char *) xmalloc (strlen ("$") + cnt + strlen ("#nn") + 1); |
0a30fbc4 | 604 | |
c906108c SS |
605 | /* Copy the packet into buffer BUF2, encapsulating it |
606 | and giving it a checksum. */ | |
607 | ||
608 | p = buf2; | |
bd99dc85 PA |
609 | if (is_notif) |
610 | *p++ = '%'; | |
611 | else | |
612 | *p++ = '$'; | |
c906108c | 613 | |
5ffff7c1 DJ |
614 | for (i = 0; i < cnt;) |
615 | i += try_rle (buf + i, cnt - i, &csum, &p); | |
616 | ||
c906108c SS |
617 | *p++ = '#'; |
618 | *p++ = tohex ((csum >> 4) & 0xf); | |
619 | *p++ = tohex (csum & 0xf); | |
620 | ||
621 | *p = '\0'; | |
622 | ||
623 | /* Send it over and over until we get a positive ack. */ | |
624 | ||
625 | do | |
626 | { | |
e0f9f062 | 627 | if (write_prim (buf2, p - buf2) != p - buf2) |
c906108c SS |
628 | { |
629 | perror ("putpkt(write)"); | |
f88c79e6 | 630 | free (buf2); |
c906108c SS |
631 | return -1; |
632 | } | |
633 | ||
bd99dc85 | 634 | if (noack_mode || is_notif) |
a6f3e723 SL |
635 | { |
636 | /* Don't expect an ack then. */ | |
637 | if (remote_debug) | |
638 | { | |
bd99dc85 | 639 | if (is_notif) |
4eefa7bc | 640 | debug_printf ("putpkt (\"%s\"); [notif]\n", buf2); |
bd99dc85 | 641 | else |
4eefa7bc PA |
642 | debug_printf ("putpkt (\"%s\"); [noack mode]\n", buf2); |
643 | debug_flush (); | |
a6f3e723 SL |
644 | } |
645 | break; | |
646 | } | |
647 | ||
c906108c | 648 | if (remote_debug) |
0d62e5e8 | 649 | { |
4eefa7bc PA |
650 | debug_printf ("putpkt (\"%s\"); [looking for ack]\n", buf2); |
651 | debug_flush (); | |
0d62e5e8 | 652 | } |
0d62e5e8 | 653 | |
bc3b5632 | 654 | cc = readchar (); |
c906108c | 655 | |
bc3b5632 DE |
656 | if (cc < 0) |
657 | { | |
0a30fbc4 | 658 | free (buf2); |
c906108c SS |
659 | return -1; |
660 | } | |
0d62e5e8 | 661 | |
bc3b5632 DE |
662 | if (remote_debug) |
663 | { | |
4eefa7bc PA |
664 | debug_printf ("[received '%c' (0x%x)]\n", cc, cc); |
665 | debug_flush (); | |
bc3b5632 DE |
666 | } |
667 | ||
0d62e5e8 | 668 | /* Check for an input interrupt while we're here. */ |
0bfdf32f | 669 | if (cc == '\003' && current_thread != NULL) |
ef57601b | 670 | (*the_target->request_interrupt) (); |
c906108c | 671 | } |
bc3b5632 | 672 | while (cc != '+'); |
c906108c | 673 | |
0a30fbc4 | 674 | free (buf2); |
c906108c SS |
675 | return 1; /* Success! */ |
676 | } | |
677 | ||
bd99dc85 PA |
678 | int |
679 | putpkt_binary (char *buf, int cnt) | |
680 | { | |
681 | return putpkt_binary_1 (buf, cnt, 0); | |
682 | } | |
683 | ||
01f9e8fa DJ |
684 | /* Send a packet to the remote machine, with error checking. The data |
685 | of the packet is in BUF, and the packet should be a NUL-terminated | |
686 | string. Returns >= 0 on success, -1 otherwise. */ | |
687 | ||
688 | int | |
689 | putpkt (char *buf) | |
690 | { | |
691 | return putpkt_binary (buf, strlen (buf)); | |
692 | } | |
693 | ||
bd99dc85 PA |
694 | int |
695 | putpkt_notif (char *buf) | |
696 | { | |
697 | return putpkt_binary_1 (buf, strlen (buf), 1); | |
698 | } | |
699 | ||
c906108c SS |
700 | /* Come here when we get an input interrupt from the remote side. This |
701 | interrupt should only be active while we are waiting for the child to do | |
bc3b5632 DE |
702 | something. Thus this assumes readchar:bufcnt is 0. |
703 | About the only thing that should come through is a ^C, which | |
ef57601b | 704 | will cause us to request child interruption. */ |
c906108c SS |
705 | |
706 | static void | |
0a30fbc4 | 707 | input_interrupt (int unused) |
c906108c | 708 | { |
cf30a8e1 C |
709 | fd_set readset; |
710 | struct timeval immediate = { 0, 0 }; | |
c906108c | 711 | |
cf30a8e1 C |
712 | /* Protect against spurious interrupts. This has been observed to |
713 | be a problem under NetBSD 1.4 and 1.5. */ | |
c906108c | 714 | |
cf30a8e1 C |
715 | FD_ZERO (&readset); |
716 | FD_SET (remote_desc, &readset); | |
717 | if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) | |
c906108c | 718 | { |
cf30a8e1 | 719 | int cc; |
fd500816 | 720 | char c = 0; |
7390519e | 721 | |
e0f9f062 | 722 | cc = read_prim (&c, 1); |
c906108c | 723 | |
fafcc06a | 724 | if (cc == 0) |
cf30a8e1 | 725 | { |
fafcc06a SDJ |
726 | fprintf (stderr, "client connection closed\n"); |
727 | return; | |
728 | } | |
f0db101d | 729 | else if (cc != 1 || c != '\003') |
fafcc06a SDJ |
730 | { |
731 | fprintf (stderr, "input_interrupt, count = %d c = %d ", cc, c); | |
732 | if (isprint (c)) | |
733 | fprintf (stderr, "('%c')\n", c); | |
734 | else | |
735 | fprintf (stderr, "('\\x%02x')\n", c & 0xff); | |
cf30a8e1 C |
736 | return; |
737 | } | |
7390519e | 738 | |
ef57601b | 739 | (*the_target->request_interrupt) (); |
cf30a8e1 | 740 | } |
c906108c | 741 | } |
7390519e PA |
742 | |
743 | /* Check if the remote side sent us an interrupt request (^C). */ | |
744 | void | |
745 | check_remote_input_interrupt_request (void) | |
746 | { | |
747 | /* This function may be called before establishing communications, | |
748 | therefore we need to validate the remote descriptor. */ | |
749 | ||
750 | if (remote_desc == INVALID_DESCRIPTOR) | |
751 | return; | |
752 | ||
753 | input_interrupt (0); | |
754 | } | |
b80864fb | 755 | |
8b207339 YQ |
756 | /* Asynchronous I/O support. SIGIO must be unblocked when waiting, |
757 | in order to accept Control-C from the client, and must be blocked | |
758 | when talking to the client. */ | |
c906108c | 759 | |
a20d5e98 | 760 | static void |
8b207339 | 761 | block_unblock_async_io (int block) |
62ea82f5 | 762 | { |
b80864fb | 763 | #ifndef USE_WIN32API |
62ea82f5 | 764 | sigset_t sigio_set; |
a20d5e98 | 765 | |
62ea82f5 DJ |
766 | sigemptyset (&sigio_set); |
767 | sigaddset (&sigio_set, SIGIO); | |
8b207339 | 768 | sigprocmask (block ? SIG_BLOCK : SIG_UNBLOCK, &sigio_set, NULL); |
b80864fb | 769 | #endif |
62ea82f5 DJ |
770 | } |
771 | ||
ac8c974e AR |
772 | #ifdef __QNX__ |
773 | static void | |
774 | nto_comctrl (int enable) | |
775 | { | |
776 | struct sigevent event; | |
777 | ||
778 | if (enable) | |
779 | { | |
780 | event.sigev_notify = SIGEV_SIGNAL_THREAD; | |
781 | event.sigev_signo = SIGIO; | |
782 | event.sigev_code = 0; | |
783 | event.sigev_value.sival_ptr = NULL; | |
784 | event.sigev_priority = -1; | |
785 | ionotify (remote_desc, _NOTIFY_ACTION_POLLARM, _NOTIFY_COND_INPUT, | |
786 | &event); | |
787 | } | |
788 | else | |
789 | ionotify (remote_desc, _NOTIFY_ACTION_POLL, _NOTIFY_COND_INPUT, NULL); | |
790 | } | |
791 | #endif /* __QNX__ */ | |
792 | ||
793 | ||
fd500816 DJ |
794 | /* Current state of asynchronous I/O. */ |
795 | static int async_io_enabled; | |
796 | ||
797 | /* Enable asynchronous I/O. */ | |
c906108c | 798 | void |
fba45db2 | 799 | enable_async_io (void) |
c906108c | 800 | { |
fd500816 DJ |
801 | if (async_io_enabled) |
802 | return; | |
803 | ||
8b207339 YQ |
804 | block_unblock_async_io (0); |
805 | ||
fd500816 | 806 | async_io_enabled = 1; |
ac8c974e AR |
807 | #ifdef __QNX__ |
808 | nto_comctrl (1); | |
809 | #endif /* __QNX__ */ | |
c906108c SS |
810 | } |
811 | ||
fd500816 | 812 | /* Disable asynchronous I/O. */ |
c906108c | 813 | void |
fba45db2 | 814 | disable_async_io (void) |
c906108c | 815 | { |
fd500816 DJ |
816 | if (!async_io_enabled) |
817 | return; | |
818 | ||
8b207339 YQ |
819 | block_unblock_async_io (1); |
820 | ||
fd500816 | 821 | async_io_enabled = 0; |
ac8c974e AR |
822 | #ifdef __QNX__ |
823 | nto_comctrl (0); | |
824 | #endif /* __QNX__ */ | |
825 | ||
c906108c SS |
826 | } |
827 | ||
a20d5e98 DJ |
828 | void |
829 | initialize_async_io (void) | |
830 | { | |
8b207339 | 831 | /* Make sure that async I/O starts blocked. */ |
a20d5e98 DJ |
832 | async_io_enabled = 1; |
833 | disable_async_io (); | |
834 | ||
8b207339 YQ |
835 | /* Install the signal handler. */ |
836 | #ifndef USE_WIN32API | |
837 | signal (SIGIO, input_interrupt); | |
838 | #endif | |
a20d5e98 DJ |
839 | } |
840 | ||
24b066ba DE |
841 | /* Internal buffer used by readchar. |
842 | These are global to readchar because reschedule_remote needs to be | |
843 | able to tell whether the buffer is empty. */ | |
844 | ||
845 | static unsigned char readchar_buf[BUFSIZ]; | |
846 | static int readchar_bufcnt = 0; | |
847 | static unsigned char *readchar_bufp; | |
848 | ||
c906108c SS |
849 | /* Returns next char from remote GDB. -1 if error. */ |
850 | ||
851 | static int | |
fba45db2 | 852 | readchar (void) |
c906108c | 853 | { |
24b066ba | 854 | int ch; |
c906108c | 855 | |
24b066ba DE |
856 | if (readchar_bufcnt == 0) |
857 | { | |
e0f9f062 | 858 | readchar_bufcnt = read_prim (readchar_buf, sizeof (readchar_buf)); |
c906108c | 859 | |
24b066ba DE |
860 | if (readchar_bufcnt <= 0) |
861 | { | |
862 | if (readchar_bufcnt == 0) | |
fddedbe6 PA |
863 | { |
864 | if (remote_debug) | |
4eefa7bc | 865 | debug_printf ("readchar: Got EOF\n"); |
fddedbe6 | 866 | } |
24b066ba DE |
867 | else |
868 | perror ("readchar"); | |
c906108c | 869 | |
24b066ba DE |
870 | return -1; |
871 | } | |
c906108c | 872 | |
24b066ba | 873 | readchar_bufp = readchar_buf; |
c906108c SS |
874 | } |
875 | ||
24b066ba DE |
876 | readchar_bufcnt--; |
877 | ch = *readchar_bufp++; | |
878 | reschedule (); | |
879 | return ch; | |
880 | } | |
881 | ||
882 | /* Reset the readchar state machine. */ | |
883 | ||
884 | static void | |
885 | reset_readchar (void) | |
886 | { | |
887 | readchar_bufcnt = 0; | |
888 | if (readchar_callback != NOT_SCHEDULED) | |
889 | { | |
890 | delete_callback_event (readchar_callback); | |
891 | readchar_callback = NOT_SCHEDULED; | |
892 | } | |
893 | } | |
894 | ||
895 | /* Process remaining data in readchar_buf. */ | |
896 | ||
897 | static int | |
898 | process_remaining (void *context) | |
899 | { | |
900 | int res; | |
901 | ||
902 | /* This is a one-shot event. */ | |
903 | readchar_callback = NOT_SCHEDULED; | |
904 | ||
905 | if (readchar_bufcnt > 0) | |
906 | res = handle_serial_event (0, NULL); | |
907 | else | |
908 | res = 0; | |
909 | ||
910 | return res; | |
911 | } | |
912 | ||
913 | /* If there is still data in the buffer, queue another event to process it, | |
914 | we can't sleep in select yet. */ | |
915 | ||
916 | static void | |
917 | reschedule (void) | |
918 | { | |
919 | if (readchar_bufcnt > 0 && readchar_callback == NOT_SCHEDULED) | |
920 | readchar_callback = append_callback_event (process_remaining, NULL); | |
c906108c SS |
921 | } |
922 | ||
923 | /* Read a packet from the remote machine, with error checking, | |
924 | and store it in BUF. Returns length of packet, or negative if error. */ | |
925 | ||
926 | int | |
fba45db2 | 927 | getpkt (char *buf) |
c906108c SS |
928 | { |
929 | char *bp; | |
930 | unsigned char csum, c1, c2; | |
931 | int c; | |
932 | ||
933 | while (1) | |
934 | { | |
935 | csum = 0; | |
936 | ||
937 | while (1) | |
938 | { | |
939 | c = readchar (); | |
5a0dd67a YQ |
940 | |
941 | /* The '\003' may appear before or after each packet, so | |
942 | check for an input interrupt. */ | |
943 | if (c == '\003') | |
944 | { | |
945 | (*the_target->request_interrupt) (); | |
946 | continue; | |
947 | } | |
948 | ||
c906108c SS |
949 | if (c == '$') |
950 | break; | |
951 | if (remote_debug) | |
0d62e5e8 | 952 | { |
4eefa7bc PA |
953 | debug_printf ("[getpkt: discarding char '%c']\n", c); |
954 | debug_flush (); | |
0d62e5e8 DJ |
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 | { | |
4eefa7bc PA |
1000 | debug_printf ("getpkt (\"%s\"); [sending ack] \n", buf); |
1001 | debug_flush (); | |
a6f3e723 | 1002 | } |
c906108c | 1003 | |
e0f9f062 | 1004 | if (write_prim ("+", 1) != 1) |
e581f2b4 | 1005 | return -1; |
c906108c | 1006 | |
a6f3e723 SL |
1007 | if (remote_debug) |
1008 | { | |
4eefa7bc PA |
1009 | debug_printf ("[sent ack]\n"); |
1010 | debug_flush (); | |
a6f3e723 | 1011 | } |
0d62e5e8 | 1012 | } |
86b1f9c5 PM |
1013 | else |
1014 | { | |
1015 | if (remote_debug) | |
1016 | { | |
4eefa7bc PA |
1017 | debug_printf ("getpkt (\"%s\"); [no ack sent] \n", buf); |
1018 | debug_flush (); | |
86b1f9c5 PM |
1019 | } |
1020 | } | |
0d62e5e8 | 1021 | |
18879fef YQ |
1022 | /* The readchar above may have already read a '\003' out of the socket |
1023 | and moved it to the local buffer. For example, when GDB sends | |
1024 | vCont;c immediately followed by interrupt (see | |
1025 | gdb.base/interrupt-noterm.exp). As soon as we see the vCont;c, we'll | |
1026 | resume the inferior and wait. Since we've already moved the '\003' | |
1027 | to the local buffer, SIGIO won't help. In that case, if we don't | |
1028 | check for interrupt after the vCont;c packet, the interrupt character | |
1029 | would stay in the buffer unattended until after the next (unrelated) | |
1030 | stop. */ | |
1031 | while (readchar_bufcnt > 0 && *readchar_bufp == '\003') | |
1032 | { | |
1033 | /* Consume the interrupt character in the buffer. */ | |
1034 | readchar (); | |
1035 | (*the_target->request_interrupt) (); | |
1036 | } | |
1037 | ||
c906108c SS |
1038 | return bp - buf; |
1039 | } | |
1040 | ||
1041 | void | |
fba45db2 | 1042 | write_ok (char *buf) |
c906108c SS |
1043 | { |
1044 | buf[0] = 'O'; | |
1045 | buf[1] = 'K'; | |
1046 | buf[2] = '\0'; | |
1047 | } | |
1048 | ||
1049 | void | |
fba45db2 | 1050 | write_enn (char *buf) |
c906108c | 1051 | { |
c89dc5d4 | 1052 | /* Some day, we should define the meanings of the error codes... */ |
c906108c | 1053 | buf[0] = 'E'; |
c89dc5d4 DJ |
1054 | buf[1] = '0'; |
1055 | buf[2] = '1'; | |
c906108c SS |
1056 | buf[3] = '\0'; |
1057 | } | |
1058 | ||
0fb4aa4b PA |
1059 | #endif |
1060 | ||
0fb4aa4b | 1061 | #ifndef IN_PROCESS_AGENT |
c906108c | 1062 | |
c906108c | 1063 | static char * |
442ea881 | 1064 | outreg (struct regcache *regcache, int regno, char *buf) |
c906108c | 1065 | { |
5c44784c JM |
1066 | if ((regno >> 12) != 0) |
1067 | *buf++ = tohex ((regno >> 12) & 0xf); | |
1068 | if ((regno >> 8) != 0) | |
1069 | *buf++ = tohex ((regno >> 8) & 0xf); | |
1070 | *buf++ = tohex ((regno >> 4) & 0xf); | |
c906108c SS |
1071 | *buf++ = tohex (regno & 0xf); |
1072 | *buf++ = ':'; | |
442ea881 | 1073 | collect_register_as_string (regcache, regno, buf); |
3aee8918 | 1074 | buf += 2 * register_size (regcache->tdesc, regno); |
c906108c SS |
1075 | *buf++ = ';'; |
1076 | ||
1077 | return buf; | |
1078 | } | |
1079 | ||
1080 | void | |
95954743 | 1081 | prepare_resume_reply (char *buf, ptid_t ptid, |
5b1c542e | 1082 | struct target_waitstatus *status) |
c906108c | 1083 | { |
5b1c542e | 1084 | if (debug_threads) |
87ce2a04 DE |
1085 | debug_printf ("Writing resume reply for %s:%d\n", |
1086 | target_pid_to_str (ptid), status->kind); | |
c906108c | 1087 | |
5b1c542e | 1088 | switch (status->kind) |
c906108c | 1089 | { |
5b1c542e | 1090 | case TARGET_WAITKIND_STOPPED: |
de0d863e | 1091 | case TARGET_WAITKIND_FORKED: |
c269dbdb | 1092 | case TARGET_WAITKIND_VFORKED: |
8228463c | 1093 | case TARGET_WAITKIND_VFORK_DONE: |
94585166 | 1094 | case TARGET_WAITKIND_EXECD: |
65706a29 | 1095 | case TARGET_WAITKIND_THREAD_CREATED: |
82075af2 JS |
1096 | case TARGET_WAITKIND_SYSCALL_ENTRY: |
1097 | case TARGET_WAITKIND_SYSCALL_RETURN: | |
5b1c542e | 1098 | { |
0bfdf32f | 1099 | struct thread_info *saved_thread; |
5b1c542e | 1100 | const char **regp; |
442ea881 | 1101 | struct regcache *regcache; |
e013ee27 | 1102 | |
c269dbdb DB |
1103 | if ((status->kind == TARGET_WAITKIND_FORKED && report_fork_events) |
1104 | || (status->kind == TARGET_WAITKIND_VFORKED && report_vfork_events)) | |
de0d863e DB |
1105 | { |
1106 | enum gdb_signal signal = GDB_SIGNAL_TRAP; | |
c269dbdb DB |
1107 | const char *event = (status->kind == TARGET_WAITKIND_FORKED |
1108 | ? "fork" : "vfork"); | |
de0d863e | 1109 | |
c269dbdb | 1110 | sprintf (buf, "T%02x%s:", signal, event); |
de0d863e DB |
1111 | buf += strlen (buf); |
1112 | buf = write_ptid (buf, status->value.related_pid); | |
1113 | strcat (buf, ";"); | |
1114 | } | |
8228463c PA |
1115 | else if (status->kind == TARGET_WAITKIND_VFORK_DONE && report_vfork_events) |
1116 | { | |
1117 | enum gdb_signal signal = GDB_SIGNAL_TRAP; | |
1118 | ||
1119 | sprintf (buf, "T%02xvforkdone:;", signal); | |
1120 | } | |
d57e0d50 | 1121 | else if (status->kind == TARGET_WAITKIND_EXECD && report_exec_events) |
94585166 DB |
1122 | { |
1123 | enum gdb_signal signal = GDB_SIGNAL_TRAP; | |
1124 | const char *event = "exec"; | |
1125 | char hexified_pathname[PATH_MAX * 2]; | |
1126 | ||
1127 | sprintf (buf, "T%02x%s:", signal, event); | |
1128 | buf += strlen (buf); | |
1129 | ||
1130 | /* Encode pathname to hexified format. */ | |
1131 | bin2hex ((const gdb_byte *) status->value.execd_pathname, | |
1132 | hexified_pathname, | |
1133 | strlen (status->value.execd_pathname)); | |
1134 | ||
1135 | sprintf (buf, "%s;", hexified_pathname); | |
1136 | xfree (status->value.execd_pathname); | |
1137 | status->value.execd_pathname = NULL; | |
1138 | buf += strlen (buf); | |
1139 | } | |
65706a29 PA |
1140 | else if (status->kind == TARGET_WAITKIND_THREAD_CREATED |
1141 | && report_thread_events) | |
1142 | { | |
1143 | enum gdb_signal signal = GDB_SIGNAL_TRAP; | |
1144 | ||
1145 | sprintf (buf, "T%02xcreate:;", signal); | |
1146 | } | |
82075af2 JS |
1147 | else if (status->kind == TARGET_WAITKIND_SYSCALL_ENTRY |
1148 | || status->kind == TARGET_WAITKIND_SYSCALL_RETURN) | |
1149 | { | |
1150 | enum gdb_signal signal = GDB_SIGNAL_TRAP; | |
1151 | const char *event = (status->kind == TARGET_WAITKIND_SYSCALL_ENTRY | |
1152 | ? "syscall_entry" : "syscall_return"); | |
1153 | ||
1154 | sprintf (buf, "T%02x%s:%x;", signal, event, | |
1155 | status->value.syscall_number); | |
1156 | } | |
de0d863e DB |
1157 | else |
1158 | sprintf (buf, "T%02x", status->value.sig); | |
1159 | ||
5b1c542e | 1160 | buf += strlen (buf); |
e013ee27 | 1161 | |
0bfdf32f | 1162 | saved_thread = current_thread; |
e013ee27 | 1163 | |
75352e28 | 1164 | switch_to_thread (ptid); |
e013ee27 | 1165 | |
3aee8918 PA |
1166 | regp = current_target_desc ()->expedite_regs; |
1167 | ||
0bfdf32f | 1168 | regcache = get_thread_regcache (current_thread, 1); |
442ea881 | 1169 | |
5b1c542e PA |
1170 | if (the_target->stopped_by_watchpoint != NULL |
1171 | && (*the_target->stopped_by_watchpoint) ()) | |
1172 | { | |
1173 | CORE_ADDR addr; | |
1174 | int i; | |
c906108c | 1175 | |
29f9a567 | 1176 | memcpy (buf, "watch:", 6); |
5b1c542e | 1177 | buf += 6; |
0d62e5e8 | 1178 | |
5b1c542e | 1179 | addr = (*the_target->stopped_data_address) (); |
255e7678 | 1180 | |
5b1c542e PA |
1181 | /* Convert each byte of the address into two hexadecimal |
1182 | chars. Note that we take sizeof (void *) instead of | |
1183 | sizeof (addr); this is to avoid sending a 64-bit | |
1184 | address to a 32-bit GDB. */ | |
1185 | for (i = sizeof (void *) * 2; i > 0; i--) | |
1186 | *buf++ = tohex ((addr >> (i - 1) * 4) & 0xf); | |
1187 | *buf++ = ';'; | |
1188 | } | |
1ec68e26 PA |
1189 | else if (swbreak_feature && target_stopped_by_sw_breakpoint ()) |
1190 | { | |
1191 | sprintf (buf, "swbreak:;"); | |
1192 | buf += strlen (buf); | |
1193 | } | |
1194 | else if (hwbreak_feature && target_stopped_by_hw_breakpoint ()) | |
1195 | { | |
1196 | sprintf (buf, "hwbreak:;"); | |
1197 | buf += strlen (buf); | |
1198 | } | |
5b1c542e PA |
1199 | |
1200 | while (*regp) | |
1201 | { | |
3aee8918 | 1202 | buf = outreg (regcache, find_regno (regcache->tdesc, *regp), buf); |
5b1c542e PA |
1203 | regp ++; |
1204 | } | |
5472f405 | 1205 | *buf = '\0'; |
5b1c542e PA |
1206 | |
1207 | /* Formerly, if the debugger had not used any thread features | |
1208 | we would not burden it with a thread status response. This | |
1209 | was for the benefit of GDB 4.13 and older. However, in | |
1210 | recent GDB versions the check (``if (cont_thread != 0)'') | |
1211 | does not have the desired effect because of sillyness in | |
1212 | the way that the remote protocol handles specifying a | |
1213 | thread. Since thread support relies on qSymbol support | |
1214 | anyway, assume GDB can handle threads. */ | |
1215 | ||
1216 | if (using_threads && !disable_packet_Tthread) | |
1217 | { | |
1218 | /* This if (1) ought to be unnecessary. But remote_wait | |
1219 | in GDB will claim this event belongs to inferior_ptid | |
1220 | if we do not specify a thread, and there's no way for | |
1221 | gdbserver to know what inferior_ptid is. */ | |
95954743 | 1222 | if (1 || !ptid_equal (general_thread, ptid)) |
5b1c542e | 1223 | { |
dc146f7c | 1224 | int core = -1; |
bd99dc85 PA |
1225 | /* In non-stop, don't change the general thread behind |
1226 | GDB's back. */ | |
1227 | if (!non_stop) | |
1228 | general_thread = ptid; | |
95954743 PA |
1229 | sprintf (buf, "thread:"); |
1230 | buf += strlen (buf); | |
1231 | buf = write_ptid (buf, ptid); | |
1232 | strcat (buf, ";"); | |
5b1c542e | 1233 | buf += strlen (buf); |
dc146f7c | 1234 | |
3e10640f YQ |
1235 | core = target_core_of_thread (ptid); |
1236 | ||
dc146f7c VP |
1237 | if (core != -1) |
1238 | { | |
1239 | sprintf (buf, "core:"); | |
1240 | buf += strlen (buf); | |
1241 | sprintf (buf, "%x", core); | |
1242 | strcat (buf, ";"); | |
1243 | buf += strlen (buf); | |
1244 | } | |
5b1c542e PA |
1245 | } |
1246 | } | |
1247 | ||
1248 | if (dlls_changed) | |
1249 | { | |
1250 | strcpy (buf, "library:;"); | |
1251 | buf += strlen (buf); | |
1252 | dlls_changed = 0; | |
1253 | } | |
1254 | ||
0bfdf32f | 1255 | current_thread = saved_thread; |
5b1c542e PA |
1256 | } |
1257 | break; | |
1258 | case TARGET_WAITKIND_EXITED: | |
95954743 PA |
1259 | if (multi_process) |
1260 | sprintf (buf, "W%x;process:%x", | |
1261 | status->value.integer, ptid_get_pid (ptid)); | |
1262 | else | |
1263 | sprintf (buf, "W%02x", status->value.integer); | |
5b1c542e PA |
1264 | break; |
1265 | case TARGET_WAITKIND_SIGNALLED: | |
95954743 PA |
1266 | if (multi_process) |
1267 | sprintf (buf, "X%x;process:%x", | |
1268 | status->value.sig, ptid_get_pid (ptid)); | |
1269 | else | |
1270 | sprintf (buf, "X%02x", status->value.sig); | |
5b1c542e | 1271 | break; |
65706a29 PA |
1272 | case TARGET_WAITKIND_THREAD_EXITED: |
1273 | sprintf (buf, "w%x;", status->value.integer); | |
1274 | buf += strlen (buf); | |
1275 | buf = write_ptid (buf, ptid); | |
1276 | break; | |
f2faf941 PA |
1277 | case TARGET_WAITKIND_NO_RESUMED: |
1278 | sprintf (buf, "N"); | |
1279 | break; | |
5b1c542e PA |
1280 | default: |
1281 | error ("unhandled waitkind"); | |
1282 | break; | |
c906108c | 1283 | } |
c906108c SS |
1284 | } |
1285 | ||
1286 | void | |
fba45db2 | 1287 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
c906108c SS |
1288 | { |
1289 | int i = 0, j = 0; | |
1290 | char ch; | |
1291 | *mem_addr_ptr = *len_ptr = 0; | |
1292 | ||
1293 | while ((ch = from[i++]) != ',') | |
1294 | { | |
1295 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1296 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1297 | } | |
1298 | ||
1299 | for (j = 0; j < 4; j++) | |
1300 | { | |
1301 | if ((ch = from[i++]) == 0) | |
1302 | break; | |
1303 | *len_ptr = *len_ptr << 4; | |
1304 | *len_ptr |= fromhex (ch) & 0x0f; | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | void | |
fba45db2 | 1309 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
fa593d66 | 1310 | unsigned char **to_p) |
c906108c SS |
1311 | { |
1312 | int i = 0; | |
1313 | char ch; | |
1314 | *mem_addr_ptr = *len_ptr = 0; | |
1315 | ||
1316 | while ((ch = from[i++]) != ',') | |
1317 | { | |
1318 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1319 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1320 | } | |
1321 | ||
1322 | while ((ch = from[i++]) != ':') | |
1323 | { | |
1324 | *len_ptr = *len_ptr << 4; | |
1325 | *len_ptr |= fromhex (ch) & 0x0f; | |
1326 | } | |
1327 | ||
fa593d66 | 1328 | if (*to_p == NULL) |
224c3ddb | 1329 | *to_p = (unsigned char *) xmalloc (*len_ptr); |
fa593d66 | 1330 | |
a7191e8b | 1331 | hex2bin (&from[i++], *to_p, *len_ptr); |
c906108c | 1332 | } |
2f2893d9 | 1333 | |
01f9e8fa DJ |
1334 | int |
1335 | decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr, | |
fa593d66 | 1336 | unsigned int *len_ptr, unsigned char **to_p) |
01f9e8fa DJ |
1337 | { |
1338 | int i = 0; | |
1339 | char ch; | |
1340 | *mem_addr_ptr = *len_ptr = 0; | |
1341 | ||
1342 | while ((ch = from[i++]) != ',') | |
1343 | { | |
1344 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1345 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1346 | } | |
1347 | ||
1348 | while ((ch = from[i++]) != ':') | |
1349 | { | |
1350 | *len_ptr = *len_ptr << 4; | |
1351 | *len_ptr |= fromhex (ch) & 0x0f; | |
1352 | } | |
1353 | ||
fa593d66 | 1354 | if (*to_p == NULL) |
224c3ddb | 1355 | *to_p = (unsigned char *) xmalloc (*len_ptr); |
fa593d66 | 1356 | |
01f9e8fa | 1357 | if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i, |
fa593d66 | 1358 | *to_p, *len_ptr) != *len_ptr) |
01f9e8fa DJ |
1359 | return -1; |
1360 | ||
1361 | return 0; | |
1362 | } | |
1363 | ||
0e7f50da | 1364 | /* Decode a qXfer write request. */ |
d08aafef | 1365 | |
0e7f50da | 1366 | int |
d08aafef | 1367 | decode_xfer_write (char *buf, int packet_len, CORE_ADDR *offset, |
0e7f50da UW |
1368 | unsigned int *len, unsigned char *data) |
1369 | { | |
1370 | char ch; | |
d08aafef | 1371 | char *b = buf; |
0e7f50da UW |
1372 | |
1373 | /* Extract the offset. */ | |
1374 | *offset = 0; | |
1375 | while ((ch = *buf++) != ':') | |
1376 | { | |
1377 | *offset = *offset << 4; | |
1378 | *offset |= fromhex (ch) & 0x0f; | |
1379 | } | |
1380 | ||
1381 | /* Get encoded data. */ | |
d08aafef | 1382 | packet_len -= buf - b; |
0e7f50da UW |
1383 | *len = remote_unescape_input ((const gdb_byte *) buf, packet_len, |
1384 | data, packet_len); | |
1385 | return 0; | |
1386 | } | |
1387 | ||
08388c79 DE |
1388 | /* Decode the parameters of a qSearch:memory packet. */ |
1389 | ||
1390 | int | |
1391 | decode_search_memory_packet (const char *buf, int packet_len, | |
1392 | CORE_ADDR *start_addrp, | |
1393 | CORE_ADDR *search_space_lenp, | |
1394 | gdb_byte *pattern, unsigned int *pattern_lenp) | |
1395 | { | |
1396 | const char *p = buf; | |
1397 | ||
1398 | p = decode_address_to_semicolon (start_addrp, p); | |
1399 | p = decode_address_to_semicolon (search_space_lenp, p); | |
1400 | packet_len -= p - buf; | |
1401 | *pattern_lenp = remote_unescape_input ((const gdb_byte *) p, packet_len, | |
1402 | pattern, packet_len); | |
1403 | return 0; | |
1404 | } | |
1405 | ||
95954743 PA |
1406 | static void |
1407 | free_sym_cache (struct sym_cache *sym) | |
1408 | { | |
1409 | if (sym != NULL) | |
1410 | { | |
1411 | free (sym->name); | |
1412 | free (sym); | |
1413 | } | |
1414 | } | |
1415 | ||
1416 | void | |
1417 | clear_symbol_cache (struct sym_cache **symcache_p) | |
1418 | { | |
1419 | struct sym_cache *sym, *next; | |
1420 | ||
1421 | /* Check the cache first. */ | |
1422 | for (sym = *symcache_p; sym; sym = next) | |
1423 | { | |
1424 | next = sym->next; | |
1425 | free_sym_cache (sym); | |
1426 | } | |
1427 | ||
1428 | *symcache_p = NULL; | |
1429 | } | |
1430 | ||
9836d6ea PA |
1431 | /* Get the address of NAME, and return it in ADDRP if found. if |
1432 | MAY_ASK_GDB is false, assume symbol cache misses are failures. | |
fd500816 DJ |
1433 | Returns 1 if the symbol is found, 0 if it is not, -1 on error. */ |
1434 | ||
2f2893d9 | 1435 | int |
9836d6ea | 1436 | look_up_one_symbol (const char *name, CORE_ADDR *addrp, int may_ask_gdb) |
2f2893d9 | 1437 | { |
28170b88 | 1438 | char *p, *q; |
2f2893d9 | 1439 | int len; |
fd500816 | 1440 | struct sym_cache *sym; |
95954743 PA |
1441 | struct process_info *proc; |
1442 | ||
1443 | proc = current_process (); | |
fd500816 DJ |
1444 | |
1445 | /* Check the cache first. */ | |
95954743 | 1446 | for (sym = proc->symbol_cache; sym; sym = sym->next) |
fd500816 DJ |
1447 | if (strcmp (name, sym->name) == 0) |
1448 | { | |
1449 | *addrp = sym->addr; | |
1450 | return 1; | |
1451 | } | |
2f2893d9 | 1452 | |
9836d6ea PA |
1453 | /* It might not be an appropriate time to look up a symbol, |
1454 | e.g. while we're trying to fetch registers. */ | |
1455 | if (!may_ask_gdb) | |
ea025f5f DJ |
1456 | return 0; |
1457 | ||
2f2893d9 DJ |
1458 | /* Send the request. */ |
1459 | strcpy (own_buf, "qSymbol:"); | |
971dc0b8 TT |
1460 | bin2hex ((const gdb_byte *) name, own_buf + strlen ("qSymbol:"), |
1461 | strlen (name)); | |
2f2893d9 DJ |
1462 | if (putpkt (own_buf) < 0) |
1463 | return -1; | |
1464 | ||
1465 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
1466 | len = getpkt (own_buf); | |
1467 | if (len < 0) | |
1468 | return -1; | |
1469 | ||
2bbe3cc1 DJ |
1470 | /* We ought to handle pretty much any packet at this point while we |
1471 | wait for the qSymbol "response". That requires re-entering the | |
1472 | main loop. For now, this is an adequate approximation; allow | |
28170b88 MK |
1473 | GDB to read from memory and handle 'v' packets (for vFile transfers) |
1474 | while it figures out the address of the symbol. */ | |
1475 | while (1) | |
2bbe3cc1 | 1476 | { |
28170b88 MK |
1477 | if (own_buf[0] == 'm') |
1478 | { | |
1479 | CORE_ADDR mem_addr; | |
1480 | unsigned char *mem_buf; | |
1481 | unsigned int mem_len; | |
1482 | ||
1483 | decode_m_packet (&own_buf[1], &mem_addr, &mem_len); | |
1484 | mem_buf = (unsigned char *) xmalloc (mem_len); | |
1485 | if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0) | |
1486 | bin2hex (mem_buf, own_buf, mem_len); | |
1487 | else | |
1488 | write_enn (own_buf); | |
1489 | free (mem_buf); | |
1490 | if (putpkt (own_buf) < 0) | |
1491 | return -1; | |
1492 | } | |
1493 | else if (own_buf[0] == 'v') | |
1494 | { | |
1495 | int new_len = -1; | |
1496 | handle_v_requests (own_buf, len, &new_len); | |
1497 | if (new_len != -1) | |
1498 | putpkt_binary (own_buf, new_len); | |
1499 | else | |
1500 | putpkt (own_buf); | |
1501 | } | |
2bbe3cc1 | 1502 | else |
28170b88 | 1503 | break; |
2bbe3cc1 DJ |
1504 | len = getpkt (own_buf); |
1505 | if (len < 0) | |
1506 | return -1; | |
1507 | } | |
1b3f6016 | 1508 | |
61012eef | 1509 | if (!startswith (own_buf, "qSymbol:")) |
2f2893d9 | 1510 | { |
2bbe3cc1 | 1511 | warning ("Malformed response to qSymbol, ignoring: %s\n", own_buf); |
2f2893d9 DJ |
1512 | return -1; |
1513 | } | |
1514 | ||
1515 | p = own_buf + strlen ("qSymbol:"); | |
1516 | q = p; | |
1517 | while (*q && *q != ':') | |
1518 | q++; | |
1519 | ||
1520 | /* Make sure we found a value for the symbol. */ | |
1521 | if (p == q || *q == '\0') | |
1522 | return 0; | |
1523 | ||
1524 | decode_address (addrp, p, q - p); | |
fd500816 DJ |
1525 | |
1526 | /* Save the symbol in our cache. */ | |
8d749320 | 1527 | sym = XNEW (struct sym_cache); |
bca929d3 | 1528 | sym->name = xstrdup (name); |
fd500816 | 1529 | sym->addr = *addrp; |
95954743 PA |
1530 | sym->next = proc->symbol_cache; |
1531 | proc->symbol_cache = sym; | |
fd500816 | 1532 | |
2f2893d9 DJ |
1533 | return 1; |
1534 | } | |
c74d0ad8 | 1535 | |
fa593d66 PA |
1536 | /* Relocate an instruction to execute at a different address. OLDLOC |
1537 | is the address in the inferior memory where the instruction to | |
1538 | relocate is currently at. On input, TO points to the destination | |
1539 | where we want the instruction to be copied (and possibly adjusted) | |
1540 | to. On output, it points to one past the end of the resulting | |
1541 | instruction(s). The effect of executing the instruction at TO | |
86a30030 | 1542 | shall be the same as if executing it at OLDLOC. For example, call |
fa593d66 PA |
1543 | instructions that implicitly push the return address on the stack |
1544 | should be adjusted to return to the instruction after OLDLOC; | |
1545 | relative branches, and other PC-relative instructions need the | |
1546 | offset adjusted; etc. Returns 0 on success, -1 on failure. */ | |
1547 | ||
1548 | int | |
1549 | relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc) | |
1550 | { | |
fa593d66 PA |
1551 | int len; |
1552 | ULONGEST written = 0; | |
1553 | ||
1554 | /* Send the request. */ | |
fa593d66 PA |
1555 | sprintf (own_buf, "qRelocInsn:%s;%s", paddress (oldloc), |
1556 | paddress (*to)); | |
1557 | if (putpkt (own_buf) < 0) | |
1558 | return -1; | |
1559 | ||
1560 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
1561 | len = getpkt (own_buf); | |
1562 | if (len < 0) | |
1563 | return -1; | |
1564 | ||
1565 | /* We ought to handle pretty much any packet at this point while we | |
1566 | wait for the qRelocInsn "response". That requires re-entering | |
1567 | the main loop. For now, this is an adequate approximation; allow | |
1568 | GDB to access memory. */ | |
1569 | while (own_buf[0] == 'm' || own_buf[0] == 'M' || own_buf[0] == 'X') | |
1570 | { | |
1571 | CORE_ADDR mem_addr; | |
1572 | unsigned char *mem_buf = NULL; | |
1573 | unsigned int mem_len; | |
1574 | ||
1575 | if (own_buf[0] == 'm') | |
1576 | { | |
1577 | decode_m_packet (&own_buf[1], &mem_addr, &mem_len); | |
224c3ddb | 1578 | mem_buf = (unsigned char *) xmalloc (mem_len); |
fa593d66 | 1579 | if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0) |
e9371aff | 1580 | bin2hex (mem_buf, own_buf, mem_len); |
fa593d66 PA |
1581 | else |
1582 | write_enn (own_buf); | |
1583 | } | |
1584 | else if (own_buf[0] == 'X') | |
1585 | { | |
1586 | if (decode_X_packet (&own_buf[1], len - 1, &mem_addr, | |
1587 | &mem_len, &mem_buf) < 0 | |
1588 | || write_inferior_memory (mem_addr, mem_buf, mem_len) != 0) | |
1589 | write_enn (own_buf); | |
1590 | else | |
1591 | write_ok (own_buf); | |
1592 | } | |
1593 | else | |
1594 | { | |
1595 | decode_M_packet (&own_buf[1], &mem_addr, &mem_len, &mem_buf); | |
1596 | if (write_inferior_memory (mem_addr, mem_buf, mem_len) == 0) | |
1597 | write_ok (own_buf); | |
1598 | else | |
1599 | write_enn (own_buf); | |
1600 | } | |
1601 | free (mem_buf); | |
1602 | if (putpkt (own_buf) < 0) | |
1603 | return -1; | |
1604 | len = getpkt (own_buf); | |
1605 | if (len < 0) | |
1606 | return -1; | |
1607 | } | |
1608 | ||
1609 | if (own_buf[0] == 'E') | |
1610 | { | |
1611 | warning ("An error occurred while relocating an instruction: %s\n", | |
1612 | own_buf); | |
1613 | return -1; | |
1614 | } | |
1615 | ||
61012eef | 1616 | if (!startswith (own_buf, "qRelocInsn:")) |
fa593d66 PA |
1617 | { |
1618 | warning ("Malformed response to qRelocInsn, ignoring: %s\n", | |
1619 | own_buf); | |
1620 | return -1; | |
1621 | } | |
1622 | ||
1623 | unpack_varlen_hex (own_buf + strlen ("qRelocInsn:"), &written); | |
1624 | ||
1625 | *to += written; | |
1626 | return 0; | |
1627 | } | |
1628 | ||
c74d0ad8 | 1629 | void |
bce7165d | 1630 | monitor_output (const char *msg) |
c74d0ad8 | 1631 | { |
0a822afb | 1632 | int len = strlen (msg); |
224c3ddb | 1633 | char *buf = (char *) xmalloc (len * 2 + 2); |
c74d0ad8 DJ |
1634 | |
1635 | buf[0] = 'O'; | |
971dc0b8 | 1636 | bin2hex ((const gdb_byte *) msg, buf + 1, len); |
c74d0ad8 DJ |
1637 | |
1638 | putpkt (buf); | |
1639 | free (buf); | |
1640 | } | |
255e7678 | 1641 | |
0fb4aa4b | 1642 | #endif |