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" |
c7ab0aef SDJ |
29 | #include "netstuff.h" |
30 | #include "filestuff.h" | |
fafcc06a | 31 | #include <ctype.h> |
b80864fb | 32 | #if HAVE_SYS_IOCTL_H |
c906108c | 33 | #include <sys/ioctl.h> |
b80864fb | 34 | #endif |
68070c10 | 35 | #if HAVE_SYS_FILE_H |
c906108c | 36 | #include <sys/file.h> |
68070c10 | 37 | #endif |
9eb1356e PA |
38 | #if HAVE_NETINET_IN_H |
39 | #include <netinet/in.h> | |
40 | #endif | |
f19c7ff8 JD |
41 | #if HAVE_SYS_UN_H |
42 | #include <sys/un.h> | |
43 | #endif | |
9eb1356e PA |
44 | #if HAVE_SYS_SOCKET_H |
45 | #include <sys/socket.h> | |
46 | #endif | |
b80864fb | 47 | #if HAVE_NETDB_H |
c906108c | 48 | #include <netdb.h> |
b80864fb DJ |
49 | #endif |
50 | #if HAVE_NETINET_TCP_H | |
c906108c | 51 | #include <netinet/tcp.h> |
b80864fb DJ |
52 | #endif |
53 | #if HAVE_SYS_IOCTL_H | |
c906108c | 54 | #include <sys/ioctl.h> |
b80864fb | 55 | #endif |
68070c10 | 56 | #if HAVE_SIGNAL_H |
c906108c | 57 | #include <signal.h> |
68070c10 PA |
58 | #endif |
59 | #if HAVE_FCNTL_H | |
c906108c | 60 | #include <fcntl.h> |
68070c10 | 61 | #endif |
438e1e42 | 62 | #include "gdb_sys_time.h" |
cf30a8e1 | 63 | #include <unistd.h> |
b80864fb | 64 | #if HAVE_ARPA_INET_H |
0729219d | 65 | #include <arpa/inet.h> |
b80864fb | 66 | #endif |
53ce3c39 | 67 | #include <sys/stat.h> |
9eb1356e PA |
68 | |
69 | #if USE_WIN32API | |
70 | #include <winsock2.h> | |
c7ab0aef | 71 | #include <wspiapi.h> |
9eb1356e | 72 | #endif |
c906108c | 73 | |
ac8c974e AR |
74 | #if __QNX__ |
75 | #include <sys/iomgr.h> | |
76 | #endif /* __QNX__ */ | |
77 | ||
f450004a DJ |
78 | #ifndef HAVE_SOCKLEN_T |
79 | typedef int socklen_t; | |
80 | #endif | |
81 | ||
0fb4aa4b PA |
82 | #ifndef IN_PROCESS_AGENT |
83 | ||
7390519e PA |
84 | #if USE_WIN32API |
85 | # define INVALID_DESCRIPTOR INVALID_SOCKET | |
86 | #else | |
87 | # define INVALID_DESCRIPTOR -1 | |
88 | #endif | |
89 | ||
24b066ba DE |
90 | /* Extra value for readchar_callback. */ |
91 | enum { | |
92 | /* The callback is currently not scheduled. */ | |
93 | NOT_SCHEDULED = -1 | |
94 | }; | |
95 | ||
96 | /* Status of the readchar callback. | |
97 | Either NOT_SCHEDULED or the callback id. */ | |
98 | static int readchar_callback = NOT_SCHEDULED; | |
99 | ||
bc3b5632 | 100 | static int readchar (void); |
24b066ba DE |
101 | static void reset_readchar (void); |
102 | static void reschedule (void); | |
bc3b5632 | 103 | |
fd500816 DJ |
104 | /* A cache entry for a successfully looked-up symbol. */ |
105 | struct sym_cache | |
106 | { | |
95954743 | 107 | char *name; |
fd500816 DJ |
108 | CORE_ADDR addr; |
109 | struct sym_cache *next; | |
110 | }; | |
111 | ||
c906108c | 112 | int remote_debug = 0; |
03863182 | 113 | struct ui_file *gdb_stdlog; |
c906108c | 114 | |
e0f9f062 DE |
115 | static int remote_is_stdio = 0; |
116 | ||
ec48365d PA |
117 | static gdb_fildes_t remote_desc = INVALID_DESCRIPTOR; |
118 | static gdb_fildes_t listen_desc = INVALID_DESCRIPTOR; | |
c906108c | 119 | |
0d62e5e8 DJ |
120 | /* FIXME headerize? */ |
121 | extern int using_threads; | |
122 | extern int debug_threads; | |
123 | ||
0f48aa01 | 124 | #ifdef USE_WIN32API |
68070c10 PA |
125 | # define read(fd, buf, len) recv (fd, (char *) buf, len, 0) |
126 | # define write(fd, buf, len) send (fd, (char *) buf, len, 0) | |
0f48aa01 DJ |
127 | #endif |
128 | ||
8336d594 PA |
129 | int |
130 | gdb_connected (void) | |
131 | { | |
132 | return remote_desc != INVALID_DESCRIPTOR; | |
133 | } | |
134 | ||
e0f9f062 DE |
135 | /* Return true if the remote connection is over stdio. */ |
136 | ||
137 | int | |
138 | remote_connection_is_stdio (void) | |
139 | { | |
140 | return remote_is_stdio; | |
141 | } | |
142 | ||
8336d594 PA |
143 | static void |
144 | enable_async_notification (int fd) | |
145 | { | |
146 | #if defined(F_SETFL) && defined (FASYNC) | |
147 | int save_fcntl_flags; | |
148 | ||
149 | save_fcntl_flags = fcntl (fd, F_GETFL, 0); | |
150 | fcntl (fd, F_SETFL, save_fcntl_flags | FASYNC); | |
151 | #if defined (F_SETOWN) | |
152 | fcntl (fd, F_SETOWN, getpid ()); | |
153 | #endif | |
154 | #endif | |
155 | } | |
156 | ||
157 | static int | |
158 | handle_accept_event (int err, gdb_client_data client_data) | |
159 | { | |
c7ab0aef SDJ |
160 | struct sockaddr_storage sockaddr; |
161 | socklen_t len = sizeof (sockaddr); | |
8336d594 PA |
162 | |
163 | if (debug_threads) | |
87ce2a04 | 164 | debug_printf ("handling possible accept event\n"); |
8336d594 | 165 | |
c7ab0aef | 166 | remote_desc = accept (listen_desc, (struct sockaddr *) &sockaddr, &len); |
8336d594 PA |
167 | if (remote_desc == -1) |
168 | perror_with_name ("Accept failed"); | |
169 | ||
170 | /* Enable TCP keep alive process. */ | |
c7ab0aef | 171 | socklen_t tmp = 1; |
8336d594 PA |
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 | ||
f19c7ff8 JD |
199 | #if HAVE_SYS_UN_H |
200 | if (sockaddr.ss_family == AF_UNIX) | |
201 | { | |
202 | struct sockaddr_un su; | |
203 | socklen_t socklen = sizeof (su); | |
c7ab0aef | 204 | |
f19c7ff8 JD |
205 | if (getsockname (listen_desc, (struct sockaddr *) &su, &socklen) != 0) |
206 | perror (_("Could not obtain remote address")); | |
c7ab0aef | 207 | |
f19c7ff8 JD |
208 | fprintf (stderr, _("Remote debugging on local socket bound to %s\n"), |
209 | su.sun_path); | |
210 | } | |
c7ab0aef | 211 | else |
f19c7ff8 JD |
212 | #endif |
213 | { | |
214 | /* Convert IP address to string. */ | |
215 | char orig_host[GDB_NI_MAX_ADDR], orig_port[GDB_NI_MAX_PORT]; | |
216 | ||
217 | int r = getnameinfo ((struct sockaddr *) &sockaddr, len, | |
218 | orig_host, sizeof (orig_host), | |
219 | orig_port, sizeof (orig_port), | |
220 | NI_NUMERICHOST | NI_NUMERICSERV); | |
221 | ||
222 | if (r != 0) | |
223 | fprintf (stderr, _("Could not obtain remote address: %s\n"), | |
224 | gai_strerror (r)); | |
225 | else | |
226 | fprintf (stderr, _("Remote debugging from host %s, port %s\n"), | |
227 | orig_host, orig_port); | |
228 | } | |
8336d594 PA |
229 | |
230 | enable_async_notification (remote_desc); | |
231 | ||
232 | /* Register the event loop handler. */ | |
233 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
234 | ||
235 | /* We have a new GDB connection now. If we were disconnected | |
236 | tracing, there's a window where the target could report a stop | |
237 | event to the event loop, and since we have a connection now, we'd | |
238 | try to send vStopped notifications to GDB. But, don't do that | |
239 | until GDB as selected all-stop/non-stop, and has queried the | |
240 | threads' status ('?'). */ | |
241 | target_async (0); | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
03f2bd59 JK |
246 | /* Prepare for a later connection to a remote debugger. |
247 | NAME is the filename used for communication. */ | |
248 | ||
249 | void | |
fb32b4f7 | 250 | remote_prepare (const char *name) |
03f2bd59 | 251 | { |
c12a5089 | 252 | client_state &cs = get_client_state (); |
03f2bd59 JK |
253 | #ifdef USE_WIN32API |
254 | static int winsock_initialized; | |
255 | #endif | |
03f2bd59 | 256 | socklen_t tmp; |
03f2bd59 | 257 | |
e0f9f062 DE |
258 | remote_is_stdio = 0; |
259 | if (strcmp (name, STDIO_CONNECTION_NAME) == 0) | |
260 | { | |
261 | /* We need to record fact that we're using stdio sooner than the | |
262 | call to remote_open so start_inferior knows the connection is | |
263 | via stdio. */ | |
264 | remote_is_stdio = 1; | |
c12a5089 | 265 | cs.transport_is_reliable = 1; |
e0f9f062 DE |
266 | return; |
267 | } | |
268 | ||
c7ab0aef SDJ |
269 | struct addrinfo hint; |
270 | struct addrinfo *ainfo; | |
271 | ||
f19c7ff8 JD |
272 | struct sockaddr *addr; |
273 | socklen_t addrlen; | |
274 | ||
c7ab0aef SDJ |
275 | memset (&hint, 0, sizeof (hint)); |
276 | /* Assume no prefix will be passed, therefore we should use | |
277 | AF_UNSPEC. */ | |
278 | hint.ai_family = AF_UNSPEC; | |
279 | hint.ai_socktype = SOCK_STREAM; | |
280 | hint.ai_protocol = IPPROTO_TCP; | |
281 | ||
282 | parsed_connection_spec parsed | |
f19c7ff8 | 283 | = parse_connection_spec (name, &hint); |
c7ab0aef SDJ |
284 | |
285 | if (parsed.port_str.empty ()) | |
03f2bd59 | 286 | { |
c12a5089 | 287 | cs.transport_is_reliable = 0; |
03f2bd59 JK |
288 | return; |
289 | } | |
290 | ||
03f2bd59 JK |
291 | #ifdef USE_WIN32API |
292 | if (!winsock_initialized) | |
293 | { | |
294 | WSADATA wsad; | |
295 | ||
296 | WSAStartup (MAKEWORD (1, 0), &wsad); | |
297 | winsock_initialized = 1; | |
298 | } | |
299 | #endif | |
300 | ||
f19c7ff8 JD |
301 | #if HAVE_SYS_UN_H |
302 | struct sockaddr_un unix_addr; | |
c7ab0aef | 303 | |
f19c7ff8 JD |
304 | #ifndef UNIX_PATH_MAX |
305 | #define UNIX_PATH_MAX sizeof (((struct sockaddr_un *) NULL)->sun_path) | |
306 | #endif | |
c7ab0aef | 307 | |
f19c7ff8 JD |
308 | if (hint.ai_family == AF_LOCAL) |
309 | { | |
310 | const char *sock_name = parsed.port_str.c_str (); | |
311 | if (parsed.port_str.length () > UNIX_PATH_MAX - 1) | |
312 | { | |
313 | error | |
314 | (_("%s is too long. Socket names may be no longer than %s bytes."), | |
315 | sock_name, pulongest (UNIX_PATH_MAX - 1)); | |
316 | return; | |
317 | } | |
318 | listen_desc = socket (AF_UNIX, SOCK_STREAM, 0); | |
319 | if (listen_desc < 0) | |
320 | perror_with_name ("Can't open socket"); | |
c7ab0aef | 321 | |
f19c7ff8 JD |
322 | memset (&unix_addr, 0, sizeof (unix_addr)); |
323 | unix_addr.sun_family = AF_UNIX; | |
324 | strncpy (unix_addr.sun_path, sock_name, UNIX_PATH_MAX - 1); | |
c7ab0aef | 325 | |
f19c7ff8 JD |
326 | struct stat statbuf; |
327 | int stat_result = stat (sock_name, &statbuf); | |
c7ab0aef | 328 | |
f19c7ff8 JD |
329 | if (stat_result == 0 |
330 | && S_ISSOCK (statbuf.st_mode)) | |
331 | unlink (sock_name); | |
332 | ||
333 | addr = (struct sockaddr *) &unix_addr; | |
334 | addrlen = sizeof (unix_addr); | |
c7ab0aef | 335 | } |
f19c7ff8 JD |
336 | else |
337 | #endif | |
338 | { | |
339 | struct addrinfo *iter; | |
c7ab0aef | 340 | |
f19c7ff8 JD |
341 | int r = getaddrinfo (parsed.host_str.c_str (), |
342 | parsed.port_str.c_str (), | |
343 | &hint, &ainfo); | |
03f2bd59 | 344 | |
f19c7ff8 JD |
345 | if (r != 0) |
346 | error (_("%s: cannot resolve name: %s"), name, gai_strerror (r)); | |
03f2bd59 | 347 | |
f19c7ff8 JD |
348 | scoped_free_addrinfo freeaddrinfo (ainfo); |
349 | ||
350 | for (iter = ainfo; iter != NULL; iter = iter->ai_next) | |
351 | { | |
352 | listen_desc = gdb_socket_cloexec (iter->ai_family, iter->ai_socktype, | |
353 | iter->ai_protocol); | |
354 | ||
355 | if (listen_desc >= 0) | |
356 | break; | |
357 | } | |
358 | ||
359 | if (iter == NULL) | |
360 | perror_with_name ("Can't open socket"); | |
361 | ||
362 | /* Allow rapid reuse of this port. */ | |
363 | tmp = 1; | |
364 | setsockopt (listen_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, | |
365 | sizeof (tmp)); | |
366 | ||
367 | if (iter->ai_socktype == SOCK_DGRAM) | |
368 | error (_("Only stream orientated protocols are currently supported.")); | |
369 | ||
370 | switch (iter->ai_family) | |
371 | { | |
372 | case AF_INET: | |
373 | ((struct sockaddr_in *) iter->ai_addr)->sin_addr.s_addr = INADDR_ANY; | |
374 | break; | |
375 | case AF_INET6: | |
376 | ((struct sockaddr_in6 *) iter->ai_addr)->sin6_addr = in6addr_any; | |
377 | break; | |
378 | default: | |
379 | internal_error (__FILE__, __LINE__, | |
380 | _("Invalid 'ai_family' %d\n"), iter->ai_family); | |
381 | } | |
382 | addr = iter->ai_addr; | |
383 | addrlen = iter->ai_addrlen; | |
c7ab0aef | 384 | } |
03f2bd59 | 385 | |
f19c7ff8 | 386 | if (bind (listen_desc, addr, addrlen) != 0) |
03f2bd59 JK |
387 | perror_with_name ("Can't bind address"); |
388 | ||
c7ab0aef SDJ |
389 | if (listen (listen_desc, 1) != 0) |
390 | perror_with_name ("Can't listen on socket"); | |
391 | ||
c12a5089 | 392 | cs.transport_is_reliable = 1; |
03f2bd59 JK |
393 | } |
394 | ||
c906108c SS |
395 | /* Open a connection to a remote debugger. |
396 | NAME is the filename used for communication. */ | |
397 | ||
398 | void | |
fb32b4f7 | 399 | remote_open (const char *name) |
c906108c | 400 | { |
fb32b4f7 | 401 | const char *port_str; |
8264bb58 DJ |
402 | |
403 | port_str = strchr (name, ':'); | |
e0f9f062 | 404 | #ifdef USE_WIN32API |
8264bb58 | 405 | if (port_str == NULL) |
752312ba | 406 | error ("Only HOST:PORT is supported on this platform."); |
e0f9f062 DE |
407 | #endif |
408 | ||
409 | if (strcmp (name, STDIO_CONNECTION_NAME) == 0) | |
410 | { | |
411 | fprintf (stderr, "Remote debugging using stdio\n"); | |
412 | ||
413 | /* Use stdin as the handle of the connection. | |
414 | We only select on reads, for example. */ | |
415 | remote_desc = fileno (stdin); | |
416 | ||
417 | enable_async_notification (remote_desc); | |
418 | ||
419 | /* Register the event loop handler. */ | |
420 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
421 | } | |
422 | #ifndef USE_WIN32API | |
423 | else if (port_str == NULL) | |
f19c7ff8 | 424 | { |
8264bb58 DJ |
425 | struct stat statbuf; |
426 | ||
427 | if (stat (name, &statbuf) == 0 | |
f19c7ff8 | 428 | && (S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode))) |
8264bb58 DJ |
429 | remote_desc = open (name, O_RDWR); |
430 | else | |
431 | { | |
432 | errno = EINVAL; | |
433 | remote_desc = -1; | |
434 | } | |
435 | ||
c906108c SS |
436 | if (remote_desc < 0) |
437 | perror_with_name ("Could not open remote device"); | |
438 | ||
726e1356 | 439 | #if HAVE_TERMIOS_H |
c906108c SS |
440 | { |
441 | struct termios termios; | |
c5aa993b | 442 | tcgetattr (remote_desc, &termios); |
c906108c SS |
443 | |
444 | termios.c_iflag = 0; | |
445 | termios.c_oflag = 0; | |
446 | termios.c_lflag = 0; | |
c5aa993b | 447 | termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 448 | termios.c_cflag |= CLOCAL | CS8; |
d0608e50 | 449 | termios.c_cc[VMIN] = 1; |
c906108c SS |
450 | termios.c_cc[VTIME] = 0; |
451 | ||
c5aa993b | 452 | tcsetattr (remote_desc, TCSANOW, &termios); |
c906108c SS |
453 | } |
454 | #endif | |
455 | ||
e641a1ca | 456 | fprintf (stderr, "Remote debugging using %s\n", name); |
a6f3e723 | 457 | |
8336d594 PA |
458 | enable_async_notification (remote_desc); |
459 | ||
460 | /* Register the event loop handler. */ | |
461 | add_file_handler (remote_desc, handle_serial_event, NULL); | |
c906108c | 462 | } |
e0f9f062 | 463 | #endif /* USE_WIN32API */ |
c906108c SS |
464 | else |
465 | { | |
c7ab0aef SDJ |
466 | char listen_port[GDB_NI_MAX_PORT]; |
467 | struct sockaddr_storage sockaddr; | |
468 | socklen_t len = sizeof (sockaddr); | |
469 | ||
470 | if (getsockname (listen_desc, (struct sockaddr *) &sockaddr, &len) < 0) | |
03f2bd59 | 471 | perror_with_name ("Can't determine port"); |
6f8486da | 472 | |
c7ab0aef SDJ |
473 | int r = getnameinfo ((struct sockaddr *) &sockaddr, len, |
474 | NULL, 0, | |
475 | listen_port, sizeof (listen_port), | |
476 | NI_NUMERICSERV); | |
477 | ||
478 | if (r != 0) | |
479 | fprintf (stderr, _("Can't obtain port where we are listening: %s"), | |
480 | gai_strerror (r)); | |
481 | else | |
482 | fprintf (stderr, _("Listening on port %s\n"), listen_port); | |
483 | ||
b80864fb | 484 | fflush (stderr); |
6910d122 | 485 | |
8336d594 PA |
486 | /* Register the event loop handler. */ |
487 | add_file_handler (listen_desc, handle_accept_event, NULL); | |
c906108c | 488 | } |
c906108c SS |
489 | } |
490 | ||
491 | void | |
fba45db2 | 492 | remote_close (void) |
c906108c | 493 | { |
bd99dc85 PA |
494 | delete_file_handler (remote_desc); |
495 | ||
e849ea89 | 496 | disable_async_io (); |
8b207339 | 497 | |
b80864fb DJ |
498 | #ifdef USE_WIN32API |
499 | closesocket (remote_desc); | |
500 | #else | |
e0f9f062 DE |
501 | if (! remote_connection_is_stdio ()) |
502 | close (remote_desc); | |
b80864fb | 503 | #endif |
8336d594 | 504 | remote_desc = INVALID_DESCRIPTOR; |
24b066ba DE |
505 | |
506 | reset_readchar (); | |
c906108c SS |
507 | } |
508 | ||
0fb4aa4b PA |
509 | #endif |
510 | ||
0fb4aa4b PA |
511 | #ifndef IN_PROCESS_AGENT |
512 | ||
dae5f5cf | 513 | void |
2f2893d9 DJ |
514 | decode_address (CORE_ADDR *addrp, const char *start, int len) |
515 | { | |
516 | CORE_ADDR addr; | |
517 | char ch; | |
518 | int i; | |
519 | ||
520 | addr = 0; | |
521 | for (i = 0; i < len; i++) | |
522 | { | |
523 | ch = start[i]; | |
524 | addr = addr << 4; | |
525 | addr = addr | (fromhex (ch) & 0x0f); | |
526 | } | |
527 | *addrp = addr; | |
528 | } | |
529 | ||
89be2091 DJ |
530 | const char * |
531 | decode_address_to_semicolon (CORE_ADDR *addrp, const char *start) | |
532 | { | |
533 | const char *end; | |
534 | ||
535 | end = start; | |
536 | while (*end != '\0' && *end != ';') | |
537 | end++; | |
538 | ||
539 | decode_address (addrp, start, end - start); | |
540 | ||
541 | if (*end == ';') | |
542 | end++; | |
543 | return end; | |
544 | } | |
545 | ||
0fb4aa4b PA |
546 | #endif |
547 | ||
0fb4aa4b PA |
548 | #ifndef IN_PROCESS_AGENT |
549 | ||
5ffff7c1 DJ |
550 | /* Look for a sequence of characters which can be run-length encoded. |
551 | If there are any, update *CSUM and *P. Otherwise, output the | |
552 | single character. Return the number of characters consumed. */ | |
553 | ||
554 | static int | |
555 | try_rle (char *buf, int remaining, unsigned char *csum, char **p) | |
556 | { | |
557 | int n; | |
558 | ||
559 | /* Always output the character. */ | |
560 | *csum += buf[0]; | |
561 | *(*p)++ = buf[0]; | |
562 | ||
563 | /* Don't go past '~'. */ | |
564 | if (remaining > 97) | |
565 | remaining = 97; | |
566 | ||
567 | for (n = 1; n < remaining; n++) | |
568 | if (buf[n] != buf[0]) | |
569 | break; | |
570 | ||
571 | /* N is the index of the first character not the same as buf[0]. | |
572 | buf[0] is counted twice, so by decrementing N, we get the number | |
573 | of characters the RLE sequence will replace. */ | |
574 | n--; | |
575 | ||
576 | if (n < 3) | |
577 | return 1; | |
578 | ||
579 | /* Skip the frame characters. The manual says to skip '+' and '-' | |
580 | also, but there's no reason to. Unfortunately these two unusable | |
581 | characters double the encoded length of a four byte zero | |
582 | value. */ | |
583 | while (n + 29 == '$' || n + 29 == '#') | |
584 | n--; | |
585 | ||
586 | *csum += '*'; | |
587 | *(*p)++ = '*'; | |
588 | *csum += n + 29; | |
589 | *(*p)++ = n + 29; | |
590 | ||
591 | return n + 1; | |
592 | } | |
593 | ||
0fb4aa4b PA |
594 | #endif |
595 | ||
0fb4aa4b PA |
596 | #ifndef IN_PROCESS_AGENT |
597 | ||
95954743 PA |
598 | /* Write a PTID to BUF. Returns BUF+CHARACTERS_WRITTEN. */ |
599 | ||
600 | char * | |
601 | write_ptid (char *buf, ptid_t ptid) | |
602 | { | |
c12a5089 | 603 | client_state &cs = get_client_state (); |
95954743 PA |
604 | int pid, tid; |
605 | ||
c12a5089 | 606 | if (cs.multi_process) |
95954743 | 607 | { |
e99b03dc | 608 | pid = ptid.pid (); |
95954743 PA |
609 | if (pid < 0) |
610 | buf += sprintf (buf, "p-%x.", -pid); | |
611 | else | |
612 | buf += sprintf (buf, "p%x.", pid); | |
613 | } | |
e38504b3 | 614 | tid = ptid.lwp (); |
95954743 PA |
615 | if (tid < 0) |
616 | buf += sprintf (buf, "-%x", -tid); | |
617 | else | |
618 | buf += sprintf (buf, "%x", tid); | |
619 | ||
620 | return buf; | |
621 | } | |
622 | ||
5b3da067 | 623 | static ULONGEST |
256642e8 | 624 | hex_or_minus_one (const char *buf, const char **obuf) |
95954743 PA |
625 | { |
626 | ULONGEST ret; | |
627 | ||
61012eef | 628 | if (startswith (buf, "-1")) |
95954743 PA |
629 | { |
630 | ret = (ULONGEST) -1; | |
631 | buf += 2; | |
632 | } | |
633 | else | |
634 | buf = unpack_varlen_hex (buf, &ret); | |
635 | ||
636 | if (obuf) | |
637 | *obuf = buf; | |
638 | ||
639 | return ret; | |
640 | } | |
641 | ||
642 | /* Extract a PTID from BUF. If non-null, OBUF is set to the to one | |
643 | passed the last parsed char. Returns null_ptid on error. */ | |
644 | ptid_t | |
256642e8 | 645 | read_ptid (const char *buf, const char **obuf) |
95954743 | 646 | { |
256642e8 PA |
647 | const char *p = buf; |
648 | const char *pp; | |
95954743 PA |
649 | ULONGEST pid = 0, tid = 0; |
650 | ||
651 | if (*p == 'p') | |
652 | { | |
653 | /* Multi-process ptid. */ | |
654 | pp = unpack_varlen_hex (p + 1, &pid); | |
655 | if (*pp != '.') | |
656 | error ("invalid remote ptid: %s\n", p); | |
657 | ||
658 | p = pp + 1; | |
659 | ||
660 | tid = hex_or_minus_one (p, &pp); | |
661 | ||
662 | if (obuf) | |
663 | *obuf = pp; | |
fd79271b | 664 | return ptid_t (pid, tid, 0); |
95954743 PA |
665 | } |
666 | ||
667 | /* No multi-process. Just a tid. */ | |
668 | tid = hex_or_minus_one (p, &pp); | |
669 | ||
3d40fbb5 PA |
670 | /* Since GDB is not sending a process id (multi-process extensions |
671 | are off), then there's only one process. Default to the first in | |
672 | the list. */ | |
673 | pid = pid_of (get_first_process ()); | |
95954743 PA |
674 | |
675 | if (obuf) | |
676 | *obuf = pp; | |
fd79271b | 677 | return ptid_t (pid, tid, 0); |
95954743 PA |
678 | } |
679 | ||
e0f9f062 DE |
680 | /* Write COUNT bytes in BUF to the client. |
681 | The result is the number of bytes written or -1 if error. | |
682 | This may return less than COUNT. */ | |
683 | ||
684 | static int | |
685 | write_prim (const void *buf, int count) | |
686 | { | |
687 | if (remote_connection_is_stdio ()) | |
688 | return write (fileno (stdout), buf, count); | |
689 | else | |
690 | return write (remote_desc, buf, count); | |
691 | } | |
692 | ||
693 | /* Read COUNT bytes from the client and store in BUF. | |
694 | The result is the number of bytes read or -1 if error. | |
695 | This may return less than COUNT. */ | |
696 | ||
697 | static int | |
698 | read_prim (void *buf, int count) | |
699 | { | |
700 | if (remote_connection_is_stdio ()) | |
701 | return read (fileno (stdin), buf, count); | |
702 | else | |
703 | return read (remote_desc, buf, count); | |
704 | } | |
705 | ||
c906108c | 706 | /* Send a packet to the remote machine, with error checking. |
01f9e8fa DJ |
707 | The data of the packet is in BUF, and the length of the |
708 | packet is in CNT. Returns >= 0 on success, -1 otherwise. */ | |
c906108c | 709 | |
bd99dc85 PA |
710 | static int |
711 | putpkt_binary_1 (char *buf, int cnt, int is_notif) | |
c906108c | 712 | { |
c12a5089 | 713 | client_state &cs = get_client_state (); |
c906108c SS |
714 | int i; |
715 | unsigned char csum = 0; | |
0a30fbc4 | 716 | char *buf2; |
c906108c | 717 | char *p; |
bc3b5632 | 718 | int cc; |
c906108c | 719 | |
224c3ddb | 720 | buf2 = (char *) xmalloc (strlen ("$") + cnt + strlen ("#nn") + 1); |
0a30fbc4 | 721 | |
c906108c SS |
722 | /* Copy the packet into buffer BUF2, encapsulating it |
723 | and giving it a checksum. */ | |
724 | ||
725 | p = buf2; | |
bd99dc85 PA |
726 | if (is_notif) |
727 | *p++ = '%'; | |
728 | else | |
729 | *p++ = '$'; | |
c906108c | 730 | |
5ffff7c1 DJ |
731 | for (i = 0; i < cnt;) |
732 | i += try_rle (buf + i, cnt - i, &csum, &p); | |
733 | ||
c906108c SS |
734 | *p++ = '#'; |
735 | *p++ = tohex ((csum >> 4) & 0xf); | |
736 | *p++ = tohex (csum & 0xf); | |
737 | ||
738 | *p = '\0'; | |
739 | ||
740 | /* Send it over and over until we get a positive ack. */ | |
741 | ||
742 | do | |
743 | { | |
e0f9f062 | 744 | if (write_prim (buf2, p - buf2) != p - buf2) |
c906108c SS |
745 | { |
746 | perror ("putpkt(write)"); | |
f88c79e6 | 747 | free (buf2); |
c906108c SS |
748 | return -1; |
749 | } | |
750 | ||
c12a5089 | 751 | if (cs.noack_mode || is_notif) |
a6f3e723 SL |
752 | { |
753 | /* Don't expect an ack then. */ | |
754 | if (remote_debug) | |
755 | { | |
bd99dc85 | 756 | if (is_notif) |
4eefa7bc | 757 | debug_printf ("putpkt (\"%s\"); [notif]\n", buf2); |
bd99dc85 | 758 | else |
4eefa7bc PA |
759 | debug_printf ("putpkt (\"%s\"); [noack mode]\n", buf2); |
760 | debug_flush (); | |
a6f3e723 SL |
761 | } |
762 | break; | |
763 | } | |
764 | ||
c906108c | 765 | if (remote_debug) |
0d62e5e8 | 766 | { |
4eefa7bc PA |
767 | debug_printf ("putpkt (\"%s\"); [looking for ack]\n", buf2); |
768 | debug_flush (); | |
0d62e5e8 | 769 | } |
0d62e5e8 | 770 | |
bc3b5632 | 771 | cc = readchar (); |
c906108c | 772 | |
bc3b5632 DE |
773 | if (cc < 0) |
774 | { | |
0a30fbc4 | 775 | free (buf2); |
c906108c SS |
776 | return -1; |
777 | } | |
0d62e5e8 | 778 | |
bc3b5632 DE |
779 | if (remote_debug) |
780 | { | |
4eefa7bc PA |
781 | debug_printf ("[received '%c' (0x%x)]\n", cc, cc); |
782 | debug_flush (); | |
bc3b5632 DE |
783 | } |
784 | ||
0d62e5e8 | 785 | /* Check for an input interrupt while we're here. */ |
0bfdf32f | 786 | if (cc == '\003' && current_thread != NULL) |
ef57601b | 787 | (*the_target->request_interrupt) (); |
c906108c | 788 | } |
bc3b5632 | 789 | while (cc != '+'); |
c906108c | 790 | |
0a30fbc4 | 791 | free (buf2); |
c906108c SS |
792 | return 1; /* Success! */ |
793 | } | |
794 | ||
bd99dc85 PA |
795 | int |
796 | putpkt_binary (char *buf, int cnt) | |
797 | { | |
798 | return putpkt_binary_1 (buf, cnt, 0); | |
799 | } | |
800 | ||
01f9e8fa DJ |
801 | /* Send a packet to the remote machine, with error checking. The data |
802 | of the packet is in BUF, and the packet should be a NUL-terminated | |
803 | string. Returns >= 0 on success, -1 otherwise. */ | |
804 | ||
805 | int | |
806 | putpkt (char *buf) | |
807 | { | |
808 | return putpkt_binary (buf, strlen (buf)); | |
809 | } | |
810 | ||
bd99dc85 PA |
811 | int |
812 | putpkt_notif (char *buf) | |
813 | { | |
814 | return putpkt_binary_1 (buf, strlen (buf), 1); | |
815 | } | |
816 | ||
c906108c SS |
817 | /* Come here when we get an input interrupt from the remote side. This |
818 | interrupt should only be active while we are waiting for the child to do | |
bc3b5632 DE |
819 | something. Thus this assumes readchar:bufcnt is 0. |
820 | About the only thing that should come through is a ^C, which | |
ef57601b | 821 | will cause us to request child interruption. */ |
c906108c SS |
822 | |
823 | static void | |
0a30fbc4 | 824 | input_interrupt (int unused) |
c906108c | 825 | { |
cf30a8e1 C |
826 | fd_set readset; |
827 | struct timeval immediate = { 0, 0 }; | |
c906108c | 828 | |
cf30a8e1 C |
829 | /* Protect against spurious interrupts. This has been observed to |
830 | be a problem under NetBSD 1.4 and 1.5. */ | |
c906108c | 831 | |
cf30a8e1 C |
832 | FD_ZERO (&readset); |
833 | FD_SET (remote_desc, &readset); | |
834 | if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) | |
c906108c | 835 | { |
cf30a8e1 | 836 | int cc; |
fd500816 | 837 | char c = 0; |
7390519e | 838 | |
e0f9f062 | 839 | cc = read_prim (&c, 1); |
c906108c | 840 | |
fafcc06a | 841 | if (cc == 0) |
cf30a8e1 | 842 | { |
fafcc06a SDJ |
843 | fprintf (stderr, "client connection closed\n"); |
844 | return; | |
845 | } | |
f0db101d | 846 | else if (cc != 1 || c != '\003') |
fafcc06a SDJ |
847 | { |
848 | fprintf (stderr, "input_interrupt, count = %d c = %d ", cc, c); | |
849 | if (isprint (c)) | |
850 | fprintf (stderr, "('%c')\n", c); | |
851 | else | |
852 | fprintf (stderr, "('\\x%02x')\n", c & 0xff); | |
cf30a8e1 C |
853 | return; |
854 | } | |
7390519e | 855 | |
ef57601b | 856 | (*the_target->request_interrupt) (); |
cf30a8e1 | 857 | } |
c906108c | 858 | } |
7390519e PA |
859 | |
860 | /* Check if the remote side sent us an interrupt request (^C). */ | |
861 | void | |
862 | check_remote_input_interrupt_request (void) | |
863 | { | |
864 | /* This function may be called before establishing communications, | |
865 | therefore we need to validate the remote descriptor. */ | |
866 | ||
867 | if (remote_desc == INVALID_DESCRIPTOR) | |
868 | return; | |
869 | ||
870 | input_interrupt (0); | |
871 | } | |
b80864fb | 872 | |
8b207339 YQ |
873 | /* Asynchronous I/O support. SIGIO must be unblocked when waiting, |
874 | in order to accept Control-C from the client, and must be blocked | |
875 | when talking to the client. */ | |
c906108c | 876 | |
a20d5e98 | 877 | static void |
8b207339 | 878 | block_unblock_async_io (int block) |
62ea82f5 | 879 | { |
b80864fb | 880 | #ifndef USE_WIN32API |
62ea82f5 | 881 | sigset_t sigio_set; |
a20d5e98 | 882 | |
62ea82f5 DJ |
883 | sigemptyset (&sigio_set); |
884 | sigaddset (&sigio_set, SIGIO); | |
8b207339 | 885 | sigprocmask (block ? SIG_BLOCK : SIG_UNBLOCK, &sigio_set, NULL); |
b80864fb | 886 | #endif |
62ea82f5 DJ |
887 | } |
888 | ||
ac8c974e AR |
889 | #ifdef __QNX__ |
890 | static void | |
891 | nto_comctrl (int enable) | |
892 | { | |
893 | struct sigevent event; | |
894 | ||
895 | if (enable) | |
896 | { | |
897 | event.sigev_notify = SIGEV_SIGNAL_THREAD; | |
898 | event.sigev_signo = SIGIO; | |
899 | event.sigev_code = 0; | |
900 | event.sigev_value.sival_ptr = NULL; | |
901 | event.sigev_priority = -1; | |
902 | ionotify (remote_desc, _NOTIFY_ACTION_POLLARM, _NOTIFY_COND_INPUT, | |
903 | &event); | |
904 | } | |
905 | else | |
906 | ionotify (remote_desc, _NOTIFY_ACTION_POLL, _NOTIFY_COND_INPUT, NULL); | |
907 | } | |
908 | #endif /* __QNX__ */ | |
909 | ||
910 | ||
fd500816 DJ |
911 | /* Current state of asynchronous I/O. */ |
912 | static int async_io_enabled; | |
913 | ||
914 | /* Enable asynchronous I/O. */ | |
c906108c | 915 | void |
fba45db2 | 916 | enable_async_io (void) |
c906108c | 917 | { |
fd500816 DJ |
918 | if (async_io_enabled) |
919 | return; | |
920 | ||
8b207339 YQ |
921 | block_unblock_async_io (0); |
922 | ||
fd500816 | 923 | async_io_enabled = 1; |
ac8c974e AR |
924 | #ifdef __QNX__ |
925 | nto_comctrl (1); | |
926 | #endif /* __QNX__ */ | |
c906108c SS |
927 | } |
928 | ||
fd500816 | 929 | /* Disable asynchronous I/O. */ |
c906108c | 930 | void |
fba45db2 | 931 | disable_async_io (void) |
c906108c | 932 | { |
fd500816 DJ |
933 | if (!async_io_enabled) |
934 | return; | |
935 | ||
8b207339 YQ |
936 | block_unblock_async_io (1); |
937 | ||
fd500816 | 938 | async_io_enabled = 0; |
ac8c974e AR |
939 | #ifdef __QNX__ |
940 | nto_comctrl (0); | |
941 | #endif /* __QNX__ */ | |
942 | ||
c906108c SS |
943 | } |
944 | ||
a20d5e98 DJ |
945 | void |
946 | initialize_async_io (void) | |
947 | { | |
8b207339 | 948 | /* Make sure that async I/O starts blocked. */ |
a20d5e98 DJ |
949 | async_io_enabled = 1; |
950 | disable_async_io (); | |
951 | ||
8b207339 YQ |
952 | /* Install the signal handler. */ |
953 | #ifndef USE_WIN32API | |
954 | signal (SIGIO, input_interrupt); | |
955 | #endif | |
a20d5e98 DJ |
956 | } |
957 | ||
24b066ba DE |
958 | /* Internal buffer used by readchar. |
959 | These are global to readchar because reschedule_remote needs to be | |
960 | able to tell whether the buffer is empty. */ | |
961 | ||
962 | static unsigned char readchar_buf[BUFSIZ]; | |
963 | static int readchar_bufcnt = 0; | |
964 | static unsigned char *readchar_bufp; | |
965 | ||
c906108c SS |
966 | /* Returns next char from remote GDB. -1 if error. */ |
967 | ||
968 | static int | |
fba45db2 | 969 | readchar (void) |
c906108c | 970 | { |
24b066ba | 971 | int ch; |
c906108c | 972 | |
24b066ba DE |
973 | if (readchar_bufcnt == 0) |
974 | { | |
e0f9f062 | 975 | readchar_bufcnt = read_prim (readchar_buf, sizeof (readchar_buf)); |
c906108c | 976 | |
24b066ba DE |
977 | if (readchar_bufcnt <= 0) |
978 | { | |
979 | if (readchar_bufcnt == 0) | |
fddedbe6 PA |
980 | { |
981 | if (remote_debug) | |
4eefa7bc | 982 | debug_printf ("readchar: Got EOF\n"); |
fddedbe6 | 983 | } |
24b066ba DE |
984 | else |
985 | perror ("readchar"); | |
c906108c | 986 | |
24b066ba DE |
987 | return -1; |
988 | } | |
c906108c | 989 | |
24b066ba | 990 | readchar_bufp = readchar_buf; |
c906108c SS |
991 | } |
992 | ||
24b066ba DE |
993 | readchar_bufcnt--; |
994 | ch = *readchar_bufp++; | |
995 | reschedule (); | |
996 | return ch; | |
997 | } | |
998 | ||
999 | /* Reset the readchar state machine. */ | |
1000 | ||
1001 | static void | |
1002 | reset_readchar (void) | |
1003 | { | |
1004 | readchar_bufcnt = 0; | |
1005 | if (readchar_callback != NOT_SCHEDULED) | |
1006 | { | |
1007 | delete_callback_event (readchar_callback); | |
1008 | readchar_callback = NOT_SCHEDULED; | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | /* Process remaining data in readchar_buf. */ | |
1013 | ||
1014 | static int | |
1015 | process_remaining (void *context) | |
1016 | { | |
1017 | int res; | |
1018 | ||
1019 | /* This is a one-shot event. */ | |
1020 | readchar_callback = NOT_SCHEDULED; | |
1021 | ||
1022 | if (readchar_bufcnt > 0) | |
1023 | res = handle_serial_event (0, NULL); | |
1024 | else | |
1025 | res = 0; | |
1026 | ||
1027 | return res; | |
1028 | } | |
1029 | ||
1030 | /* If there is still data in the buffer, queue another event to process it, | |
1031 | we can't sleep in select yet. */ | |
1032 | ||
1033 | static void | |
1034 | reschedule (void) | |
1035 | { | |
1036 | if (readchar_bufcnt > 0 && readchar_callback == NOT_SCHEDULED) | |
1037 | readchar_callback = append_callback_event (process_remaining, NULL); | |
c906108c SS |
1038 | } |
1039 | ||
1040 | /* Read a packet from the remote machine, with error checking, | |
1041 | and store it in BUF. Returns length of packet, or negative if error. */ | |
1042 | ||
1043 | int | |
fba45db2 | 1044 | getpkt (char *buf) |
c906108c | 1045 | { |
c12a5089 | 1046 | client_state &cs = get_client_state (); |
c906108c SS |
1047 | char *bp; |
1048 | unsigned char csum, c1, c2; | |
1049 | int c; | |
1050 | ||
1051 | while (1) | |
1052 | { | |
1053 | csum = 0; | |
1054 | ||
1055 | while (1) | |
1056 | { | |
1057 | c = readchar (); | |
5a0dd67a YQ |
1058 | |
1059 | /* The '\003' may appear before or after each packet, so | |
1060 | check for an input interrupt. */ | |
1061 | if (c == '\003') | |
1062 | { | |
1063 | (*the_target->request_interrupt) (); | |
1064 | continue; | |
1065 | } | |
1066 | ||
c906108c SS |
1067 | if (c == '$') |
1068 | break; | |
1069 | if (remote_debug) | |
0d62e5e8 | 1070 | { |
4eefa7bc PA |
1071 | debug_printf ("[getpkt: discarding char '%c']\n", c); |
1072 | debug_flush (); | |
0d62e5e8 DJ |
1073 | } |
1074 | ||
c906108c SS |
1075 | if (c < 0) |
1076 | return -1; | |
1077 | } | |
1078 | ||
1079 | bp = buf; | |
1080 | while (1) | |
1081 | { | |
1082 | c = readchar (); | |
1083 | if (c < 0) | |
1084 | return -1; | |
1085 | if (c == '#') | |
1086 | break; | |
1087 | *bp++ = c; | |
1088 | csum += c; | |
1089 | } | |
1090 | *bp = 0; | |
1091 | ||
1092 | c1 = fromhex (readchar ()); | |
1093 | c2 = fromhex (readchar ()); | |
c5aa993b | 1094 | |
c906108c SS |
1095 | if (csum == (c1 << 4) + c2) |
1096 | break; | |
1097 | ||
c12a5089 | 1098 | if (cs.noack_mode) |
a6f3e723 | 1099 | { |
493e2a69 MS |
1100 | fprintf (stderr, |
1101 | "Bad checksum, sentsum=0x%x, csum=0x%x, " | |
1102 | "buf=%s [no-ack-mode, Bad medium?]\n", | |
a6f3e723 SL |
1103 | (c1 << 4) + c2, csum, buf); |
1104 | /* Not much we can do, GDB wasn't expecting an ack/nac. */ | |
1105 | break; | |
1106 | } | |
1107 | ||
c906108c SS |
1108 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", |
1109 | (c1 << 4) + c2, csum, buf); | |
e0f9f062 | 1110 | if (write_prim ("-", 1) != 1) |
e581f2b4 | 1111 | return -1; |
c906108c SS |
1112 | } |
1113 | ||
c12a5089 | 1114 | if (!cs.noack_mode) |
0d62e5e8 | 1115 | { |
a6f3e723 SL |
1116 | if (remote_debug) |
1117 | { | |
4eefa7bc PA |
1118 | debug_printf ("getpkt (\"%s\"); [sending ack] \n", buf); |
1119 | debug_flush (); | |
a6f3e723 | 1120 | } |
c906108c | 1121 | |
e0f9f062 | 1122 | if (write_prim ("+", 1) != 1) |
e581f2b4 | 1123 | return -1; |
c906108c | 1124 | |
a6f3e723 SL |
1125 | if (remote_debug) |
1126 | { | |
4eefa7bc PA |
1127 | debug_printf ("[sent ack]\n"); |
1128 | debug_flush (); | |
a6f3e723 | 1129 | } |
0d62e5e8 | 1130 | } |
86b1f9c5 PM |
1131 | else |
1132 | { | |
1133 | if (remote_debug) | |
1134 | { | |
4eefa7bc PA |
1135 | debug_printf ("getpkt (\"%s\"); [no ack sent] \n", buf); |
1136 | debug_flush (); | |
86b1f9c5 PM |
1137 | } |
1138 | } | |
0d62e5e8 | 1139 | |
18879fef YQ |
1140 | /* The readchar above may have already read a '\003' out of the socket |
1141 | and moved it to the local buffer. For example, when GDB sends | |
1142 | vCont;c immediately followed by interrupt (see | |
1143 | gdb.base/interrupt-noterm.exp). As soon as we see the vCont;c, we'll | |
1144 | resume the inferior and wait. Since we've already moved the '\003' | |
1145 | to the local buffer, SIGIO won't help. In that case, if we don't | |
1146 | check for interrupt after the vCont;c packet, the interrupt character | |
1147 | would stay in the buffer unattended until after the next (unrelated) | |
1148 | stop. */ | |
1149 | while (readchar_bufcnt > 0 && *readchar_bufp == '\003') | |
1150 | { | |
1151 | /* Consume the interrupt character in the buffer. */ | |
1152 | readchar (); | |
1153 | (*the_target->request_interrupt) (); | |
1154 | } | |
1155 | ||
c906108c SS |
1156 | return bp - buf; |
1157 | } | |
1158 | ||
1159 | void | |
fba45db2 | 1160 | write_ok (char *buf) |
c906108c SS |
1161 | { |
1162 | buf[0] = 'O'; | |
1163 | buf[1] = 'K'; | |
1164 | buf[2] = '\0'; | |
1165 | } | |
1166 | ||
1167 | void | |
fba45db2 | 1168 | write_enn (char *buf) |
c906108c | 1169 | { |
c89dc5d4 | 1170 | /* Some day, we should define the meanings of the error codes... */ |
c906108c | 1171 | buf[0] = 'E'; |
c89dc5d4 DJ |
1172 | buf[1] = '0'; |
1173 | buf[2] = '1'; | |
c906108c SS |
1174 | buf[3] = '\0'; |
1175 | } | |
1176 | ||
0fb4aa4b PA |
1177 | #endif |
1178 | ||
0fb4aa4b | 1179 | #ifndef IN_PROCESS_AGENT |
c906108c | 1180 | |
c906108c | 1181 | static char * |
442ea881 | 1182 | outreg (struct regcache *regcache, int regno, char *buf) |
c906108c | 1183 | { |
5c44784c JM |
1184 | if ((regno >> 12) != 0) |
1185 | *buf++ = tohex ((regno >> 12) & 0xf); | |
1186 | if ((regno >> 8) != 0) | |
1187 | *buf++ = tohex ((regno >> 8) & 0xf); | |
1188 | *buf++ = tohex ((regno >> 4) & 0xf); | |
c906108c SS |
1189 | *buf++ = tohex (regno & 0xf); |
1190 | *buf++ = ':'; | |
442ea881 | 1191 | collect_register_as_string (regcache, regno, buf); |
3aee8918 | 1192 | buf += 2 * register_size (regcache->tdesc, regno); |
c906108c SS |
1193 | *buf++ = ';'; |
1194 | ||
1195 | return buf; | |
1196 | } | |
1197 | ||
1198 | void | |
95954743 | 1199 | prepare_resume_reply (char *buf, ptid_t ptid, |
5b1c542e | 1200 | struct target_waitstatus *status) |
c906108c | 1201 | { |
c12a5089 | 1202 | client_state &cs = get_client_state (); |
5b1c542e | 1203 | if (debug_threads) |
87ce2a04 DE |
1204 | debug_printf ("Writing resume reply for %s:%d\n", |
1205 | target_pid_to_str (ptid), status->kind); | |
c906108c | 1206 | |
5b1c542e | 1207 | switch (status->kind) |
c906108c | 1208 | { |
5b1c542e | 1209 | case TARGET_WAITKIND_STOPPED: |
de0d863e | 1210 | case TARGET_WAITKIND_FORKED: |
c269dbdb | 1211 | case TARGET_WAITKIND_VFORKED: |
8228463c | 1212 | case TARGET_WAITKIND_VFORK_DONE: |
94585166 | 1213 | case TARGET_WAITKIND_EXECD: |
65706a29 | 1214 | case TARGET_WAITKIND_THREAD_CREATED: |
82075af2 JS |
1215 | case TARGET_WAITKIND_SYSCALL_ENTRY: |
1216 | case TARGET_WAITKIND_SYSCALL_RETURN: | |
5b1c542e | 1217 | { |
0bfdf32f | 1218 | struct thread_info *saved_thread; |
5b1c542e | 1219 | const char **regp; |
442ea881 | 1220 | struct regcache *regcache; |
e013ee27 | 1221 | |
c12a5089 | 1222 | if ((status->kind == TARGET_WAITKIND_FORKED && cs.report_fork_events) |
f19c7ff8 | 1223 | || (status->kind == TARGET_WAITKIND_VFORKED |
c12a5089 | 1224 | && cs.report_vfork_events)) |
de0d863e DB |
1225 | { |
1226 | enum gdb_signal signal = GDB_SIGNAL_TRAP; | |
c269dbdb DB |
1227 | const char *event = (status->kind == TARGET_WAITKIND_FORKED |
1228 | ? "fork" : "vfork"); | |
de0d863e | 1229 | |
c269dbdb | 1230 | sprintf (buf, "T%02x%s:", signal, event); |
de0d863e DB |
1231 | buf += strlen (buf); |
1232 | buf = write_ptid (buf, status->value.related_pid); | |
1233 | strcat (buf, ";"); | |
1234 | } | |
f19c7ff8 | 1235 | else if (status->kind == TARGET_WAITKIND_VFORK_DONE |
c12a5089 | 1236 | && cs.report_vfork_events) |
8228463c PA |
1237 | { |
1238 | enum gdb_signal signal = GDB_SIGNAL_TRAP; | |
1239 | ||
1240 | sprintf (buf, "T%02xvforkdone:;", signal); | |
1241 | } | |
c12a5089 | 1242 | else if (status->kind == TARGET_WAITKIND_EXECD && cs.report_exec_events) |
94585166 DB |
1243 | { |
1244 | enum gdb_signal signal = GDB_SIGNAL_TRAP; | |
1245 | const char *event = "exec"; | |
1246 | char hexified_pathname[PATH_MAX * 2]; | |
1247 | ||
1248 | sprintf (buf, "T%02x%s:", signal, event); | |
1249 | buf += strlen (buf); | |
1250 | ||
1251 | /* Encode pathname to hexified format. */ | |
1252 | bin2hex ((const gdb_byte *) status->value.execd_pathname, | |
1253 | hexified_pathname, | |
1254 | strlen (status->value.execd_pathname)); | |
1255 | ||
1256 | sprintf (buf, "%s;", hexified_pathname); | |
1257 | xfree (status->value.execd_pathname); | |
1258 | status->value.execd_pathname = NULL; | |
1259 | buf += strlen (buf); | |
1260 | } | |
65706a29 | 1261 | else if (status->kind == TARGET_WAITKIND_THREAD_CREATED |
c12a5089 | 1262 | && cs.report_thread_events) |
65706a29 PA |
1263 | { |
1264 | enum gdb_signal signal = GDB_SIGNAL_TRAP; | |
1265 | ||
1266 | sprintf (buf, "T%02xcreate:;", signal); | |
1267 | } | |
82075af2 JS |
1268 | else if (status->kind == TARGET_WAITKIND_SYSCALL_ENTRY |
1269 | || status->kind == TARGET_WAITKIND_SYSCALL_RETURN) | |
1270 | { | |
1271 | enum gdb_signal signal = GDB_SIGNAL_TRAP; | |
1272 | const char *event = (status->kind == TARGET_WAITKIND_SYSCALL_ENTRY | |
1273 | ? "syscall_entry" : "syscall_return"); | |
1274 | ||
1275 | sprintf (buf, "T%02x%s:%x;", signal, event, | |
1276 | status->value.syscall_number); | |
1277 | } | |
de0d863e DB |
1278 | else |
1279 | sprintf (buf, "T%02x", status->value.sig); | |
1280 | ||
5b1c542e | 1281 | buf += strlen (buf); |
e013ee27 | 1282 | |
0bfdf32f | 1283 | saved_thread = current_thread; |
e013ee27 | 1284 | |
75352e28 | 1285 | switch_to_thread (ptid); |
e013ee27 | 1286 | |
3aee8918 PA |
1287 | regp = current_target_desc ()->expedite_regs; |
1288 | ||
0bfdf32f | 1289 | regcache = get_thread_regcache (current_thread, 1); |
442ea881 | 1290 | |
5b1c542e PA |
1291 | if (the_target->stopped_by_watchpoint != NULL |
1292 | && (*the_target->stopped_by_watchpoint) ()) | |
1293 | { | |
1294 | CORE_ADDR addr; | |
1295 | int i; | |
c906108c | 1296 | |
29f9a567 | 1297 | memcpy (buf, "watch:", 6); |
5b1c542e | 1298 | buf += 6; |
0d62e5e8 | 1299 | |
5b1c542e | 1300 | addr = (*the_target->stopped_data_address) (); |
255e7678 | 1301 | |
5b1c542e PA |
1302 | /* Convert each byte of the address into two hexadecimal |
1303 | chars. Note that we take sizeof (void *) instead of | |
1304 | sizeof (addr); this is to avoid sending a 64-bit | |
1305 | address to a 32-bit GDB. */ | |
1306 | for (i = sizeof (void *) * 2; i > 0; i--) | |
1307 | *buf++ = tohex ((addr >> (i - 1) * 4) & 0xf); | |
1308 | *buf++ = ';'; | |
1309 | } | |
c12a5089 | 1310 | else if (cs.swbreak_feature && target_stopped_by_sw_breakpoint ()) |
1ec68e26 PA |
1311 | { |
1312 | sprintf (buf, "swbreak:;"); | |
1313 | buf += strlen (buf); | |
1314 | } | |
c12a5089 | 1315 | else if (cs.hwbreak_feature && target_stopped_by_hw_breakpoint ()) |
1ec68e26 PA |
1316 | { |
1317 | sprintf (buf, "hwbreak:;"); | |
1318 | buf += strlen (buf); | |
1319 | } | |
5b1c542e PA |
1320 | |
1321 | while (*regp) | |
1322 | { | |
3aee8918 | 1323 | buf = outreg (regcache, find_regno (regcache->tdesc, *regp), buf); |
5b1c542e PA |
1324 | regp ++; |
1325 | } | |
5472f405 | 1326 | *buf = '\0'; |
5b1c542e PA |
1327 | |
1328 | /* Formerly, if the debugger had not used any thread features | |
1329 | we would not burden it with a thread status response. This | |
1330 | was for the benefit of GDB 4.13 and older. However, in | |
1331 | recent GDB versions the check (``if (cont_thread != 0)'') | |
1332 | does not have the desired effect because of sillyness in | |
1333 | the way that the remote protocol handles specifying a | |
1334 | thread. Since thread support relies on qSymbol support | |
1335 | anyway, assume GDB can handle threads. */ | |
1336 | ||
1337 | if (using_threads && !disable_packet_Tthread) | |
1338 | { | |
1339 | /* This if (1) ought to be unnecessary. But remote_wait | |
1340 | in GDB will claim this event belongs to inferior_ptid | |
1341 | if we do not specify a thread, and there's no way for | |
1342 | gdbserver to know what inferior_ptid is. */ | |
d7e15655 | 1343 | if (1 || cs.general_thread != ptid) |
5b1c542e | 1344 | { |
dc146f7c | 1345 | int core = -1; |
bd99dc85 PA |
1346 | /* In non-stop, don't change the general thread behind |
1347 | GDB's back. */ | |
1348 | if (!non_stop) | |
c12a5089 | 1349 | cs.general_thread = ptid; |
95954743 PA |
1350 | sprintf (buf, "thread:"); |
1351 | buf += strlen (buf); | |
1352 | buf = write_ptid (buf, ptid); | |
1353 | strcat (buf, ";"); | |
5b1c542e | 1354 | buf += strlen (buf); |
dc146f7c | 1355 | |
3e10640f YQ |
1356 | core = target_core_of_thread (ptid); |
1357 | ||
dc146f7c VP |
1358 | if (core != -1) |
1359 | { | |
1360 | sprintf (buf, "core:"); | |
1361 | buf += strlen (buf); | |
1362 | sprintf (buf, "%x", core); | |
1363 | strcat (buf, ";"); | |
1364 | buf += strlen (buf); | |
1365 | } | |
5b1c542e PA |
1366 | } |
1367 | } | |
1368 | ||
1369 | if (dlls_changed) | |
1370 | { | |
1371 | strcpy (buf, "library:;"); | |
1372 | buf += strlen (buf); | |
1373 | dlls_changed = 0; | |
1374 | } | |
1375 | ||
0bfdf32f | 1376 | current_thread = saved_thread; |
5b1c542e PA |
1377 | } |
1378 | break; | |
1379 | case TARGET_WAITKIND_EXITED: | |
c12a5089 | 1380 | if (cs.multi_process) |
95954743 | 1381 | sprintf (buf, "W%x;process:%x", |
e99b03dc | 1382 | status->value.integer, ptid.pid ()); |
95954743 PA |
1383 | else |
1384 | sprintf (buf, "W%02x", status->value.integer); | |
5b1c542e PA |
1385 | break; |
1386 | case TARGET_WAITKIND_SIGNALLED: | |
c12a5089 | 1387 | if (cs.multi_process) |
95954743 | 1388 | sprintf (buf, "X%x;process:%x", |
e99b03dc | 1389 | status->value.sig, ptid.pid ()); |
95954743 PA |
1390 | else |
1391 | sprintf (buf, "X%02x", status->value.sig); | |
5b1c542e | 1392 | break; |
65706a29 PA |
1393 | case TARGET_WAITKIND_THREAD_EXITED: |
1394 | sprintf (buf, "w%x;", status->value.integer); | |
1395 | buf += strlen (buf); | |
1396 | buf = write_ptid (buf, ptid); | |
1397 | break; | |
f2faf941 PA |
1398 | case TARGET_WAITKIND_NO_RESUMED: |
1399 | sprintf (buf, "N"); | |
1400 | break; | |
5b1c542e PA |
1401 | default: |
1402 | error ("unhandled waitkind"); | |
1403 | break; | |
c906108c | 1404 | } |
c906108c SS |
1405 | } |
1406 | ||
1407 | void | |
fba45db2 | 1408 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
c906108c SS |
1409 | { |
1410 | int i = 0, j = 0; | |
1411 | char ch; | |
1412 | *mem_addr_ptr = *len_ptr = 0; | |
1413 | ||
1414 | while ((ch = from[i++]) != ',') | |
1415 | { | |
1416 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1417 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1418 | } | |
1419 | ||
1420 | for (j = 0; j < 4; j++) | |
1421 | { | |
1422 | if ((ch = from[i++]) == 0) | |
1423 | break; | |
1424 | *len_ptr = *len_ptr << 4; | |
1425 | *len_ptr |= fromhex (ch) & 0x0f; | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | void | |
fba45db2 | 1430 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
fa593d66 | 1431 | unsigned char **to_p) |
c906108c SS |
1432 | { |
1433 | int i = 0; | |
1434 | char ch; | |
1435 | *mem_addr_ptr = *len_ptr = 0; | |
1436 | ||
1437 | while ((ch = from[i++]) != ',') | |
1438 | { | |
1439 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1440 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1441 | } | |
1442 | ||
1443 | while ((ch = from[i++]) != ':') | |
1444 | { | |
1445 | *len_ptr = *len_ptr << 4; | |
1446 | *len_ptr |= fromhex (ch) & 0x0f; | |
1447 | } | |
1448 | ||
fa593d66 | 1449 | if (*to_p == NULL) |
224c3ddb | 1450 | *to_p = (unsigned char *) xmalloc (*len_ptr); |
fa593d66 | 1451 | |
a7191e8b | 1452 | hex2bin (&from[i++], *to_p, *len_ptr); |
c906108c | 1453 | } |
2f2893d9 | 1454 | |
01f9e8fa DJ |
1455 | int |
1456 | decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr, | |
fa593d66 | 1457 | unsigned int *len_ptr, unsigned char **to_p) |
01f9e8fa DJ |
1458 | { |
1459 | int i = 0; | |
1460 | char ch; | |
1461 | *mem_addr_ptr = *len_ptr = 0; | |
1462 | ||
1463 | while ((ch = from[i++]) != ',') | |
1464 | { | |
1465 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
1466 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
1467 | } | |
1468 | ||
1469 | while ((ch = from[i++]) != ':') | |
1470 | { | |
1471 | *len_ptr = *len_ptr << 4; | |
1472 | *len_ptr |= fromhex (ch) & 0x0f; | |
1473 | } | |
1474 | ||
fa593d66 | 1475 | if (*to_p == NULL) |
224c3ddb | 1476 | *to_p = (unsigned char *) xmalloc (*len_ptr); |
fa593d66 | 1477 | |
01f9e8fa | 1478 | if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i, |
fa593d66 | 1479 | *to_p, *len_ptr) != *len_ptr) |
01f9e8fa DJ |
1480 | return -1; |
1481 | ||
1482 | return 0; | |
1483 | } | |
1484 | ||
0e7f50da | 1485 | /* Decode a qXfer write request. */ |
d08aafef | 1486 | |
0e7f50da | 1487 | int |
d08aafef | 1488 | decode_xfer_write (char *buf, int packet_len, CORE_ADDR *offset, |
0e7f50da UW |
1489 | unsigned int *len, unsigned char *data) |
1490 | { | |
1491 | char ch; | |
d08aafef | 1492 | char *b = buf; |
0e7f50da UW |
1493 | |
1494 | /* Extract the offset. */ | |
1495 | *offset = 0; | |
1496 | while ((ch = *buf++) != ':') | |
1497 | { | |
1498 | *offset = *offset << 4; | |
1499 | *offset |= fromhex (ch) & 0x0f; | |
1500 | } | |
1501 | ||
1502 | /* Get encoded data. */ | |
d08aafef | 1503 | packet_len -= buf - b; |
0e7f50da UW |
1504 | *len = remote_unescape_input ((const gdb_byte *) buf, packet_len, |
1505 | data, packet_len); | |
1506 | return 0; | |
1507 | } | |
1508 | ||
08388c79 DE |
1509 | /* Decode the parameters of a qSearch:memory packet. */ |
1510 | ||
1511 | int | |
1512 | decode_search_memory_packet (const char *buf, int packet_len, | |
1513 | CORE_ADDR *start_addrp, | |
1514 | CORE_ADDR *search_space_lenp, | |
1515 | gdb_byte *pattern, unsigned int *pattern_lenp) | |
1516 | { | |
1517 | const char *p = buf; | |
1518 | ||
1519 | p = decode_address_to_semicolon (start_addrp, p); | |
1520 | p = decode_address_to_semicolon (search_space_lenp, p); | |
1521 | packet_len -= p - buf; | |
1522 | *pattern_lenp = remote_unescape_input ((const gdb_byte *) p, packet_len, | |
1523 | pattern, packet_len); | |
1524 | return 0; | |
1525 | } | |
1526 | ||
95954743 PA |
1527 | static void |
1528 | free_sym_cache (struct sym_cache *sym) | |
1529 | { | |
1530 | if (sym != NULL) | |
1531 | { | |
1532 | free (sym->name); | |
1533 | free (sym); | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | void | |
1538 | clear_symbol_cache (struct sym_cache **symcache_p) | |
1539 | { | |
1540 | struct sym_cache *sym, *next; | |
1541 | ||
1542 | /* Check the cache first. */ | |
1543 | for (sym = *symcache_p; sym; sym = next) | |
1544 | { | |
1545 | next = sym->next; | |
1546 | free_sym_cache (sym); | |
1547 | } | |
1548 | ||
1549 | *symcache_p = NULL; | |
1550 | } | |
1551 | ||
9836d6ea PA |
1552 | /* Get the address of NAME, and return it in ADDRP if found. if |
1553 | MAY_ASK_GDB is false, assume symbol cache misses are failures. | |
fd500816 DJ |
1554 | Returns 1 if the symbol is found, 0 if it is not, -1 on error. */ |
1555 | ||
2f2893d9 | 1556 | int |
9836d6ea | 1557 | look_up_one_symbol (const char *name, CORE_ADDR *addrp, int may_ask_gdb) |
2f2893d9 | 1558 | { |
c12a5089 | 1559 | client_state &cs = get_client_state (); |
28170b88 | 1560 | char *p, *q; |
2f2893d9 | 1561 | int len; |
fd500816 | 1562 | struct sym_cache *sym; |
95954743 PA |
1563 | struct process_info *proc; |
1564 | ||
1565 | proc = current_process (); | |
fd500816 DJ |
1566 | |
1567 | /* Check the cache first. */ | |
95954743 | 1568 | for (sym = proc->symbol_cache; sym; sym = sym->next) |
fd500816 DJ |
1569 | if (strcmp (name, sym->name) == 0) |
1570 | { | |
1571 | *addrp = sym->addr; | |
1572 | return 1; | |
1573 | } | |
2f2893d9 | 1574 | |
9836d6ea PA |
1575 | /* It might not be an appropriate time to look up a symbol, |
1576 | e.g. while we're trying to fetch registers. */ | |
1577 | if (!may_ask_gdb) | |
ea025f5f DJ |
1578 | return 0; |
1579 | ||
2f2893d9 | 1580 | /* Send the request. */ |
c12a5089 SC |
1581 | strcpy (cs.own_buf, "qSymbol:"); |
1582 | bin2hex ((const gdb_byte *) name, cs.own_buf + strlen ("qSymbol:"), | |
971dc0b8 | 1583 | strlen (name)); |
c12a5089 | 1584 | if (putpkt (cs.own_buf) < 0) |
2f2893d9 DJ |
1585 | return -1; |
1586 | ||
1587 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
c12a5089 | 1588 | len = getpkt (cs.own_buf); |
2f2893d9 DJ |
1589 | if (len < 0) |
1590 | return -1; | |
1591 | ||
2bbe3cc1 DJ |
1592 | /* We ought to handle pretty much any packet at this point while we |
1593 | wait for the qSymbol "response". That requires re-entering the | |
1594 | main loop. For now, this is an adequate approximation; allow | |
28170b88 MK |
1595 | GDB to read from memory and handle 'v' packets (for vFile transfers) |
1596 | while it figures out the address of the symbol. */ | |
1597 | while (1) | |
2bbe3cc1 | 1598 | { |
c12a5089 | 1599 | if (cs.own_buf[0] == 'm') |
28170b88 MK |
1600 | { |
1601 | CORE_ADDR mem_addr; | |
1602 | unsigned char *mem_buf; | |
1603 | unsigned int mem_len; | |
1604 | ||
c12a5089 | 1605 | decode_m_packet (&cs.own_buf[1], &mem_addr, &mem_len); |
28170b88 MK |
1606 | mem_buf = (unsigned char *) xmalloc (mem_len); |
1607 | if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0) | |
c12a5089 | 1608 | bin2hex (mem_buf, cs.own_buf, mem_len); |
28170b88 | 1609 | else |
c12a5089 | 1610 | write_enn (cs.own_buf); |
28170b88 | 1611 | free (mem_buf); |
c12a5089 | 1612 | if (putpkt (cs.own_buf) < 0) |
28170b88 MK |
1613 | return -1; |
1614 | } | |
c12a5089 | 1615 | else if (cs.own_buf[0] == 'v') |
28170b88 MK |
1616 | { |
1617 | int new_len = -1; | |
c12a5089 | 1618 | handle_v_requests (cs.own_buf, len, &new_len); |
28170b88 | 1619 | if (new_len != -1) |
c12a5089 | 1620 | putpkt_binary (cs.own_buf, new_len); |
28170b88 | 1621 | else |
c12a5089 | 1622 | putpkt (cs.own_buf); |
28170b88 | 1623 | } |
2bbe3cc1 | 1624 | else |
28170b88 | 1625 | break; |
c12a5089 | 1626 | len = getpkt (cs.own_buf); |
2bbe3cc1 DJ |
1627 | if (len < 0) |
1628 | return -1; | |
1629 | } | |
1b3f6016 | 1630 | |
c12a5089 | 1631 | if (!startswith (cs.own_buf, "qSymbol:")) |
2f2893d9 | 1632 | { |
c12a5089 | 1633 | warning ("Malformed response to qSymbol, ignoring: %s\n", cs.own_buf); |
2f2893d9 DJ |
1634 | return -1; |
1635 | } | |
1636 | ||
c12a5089 | 1637 | p = cs.own_buf + strlen ("qSymbol:"); |
2f2893d9 DJ |
1638 | q = p; |
1639 | while (*q && *q != ':') | |
1640 | q++; | |
1641 | ||
1642 | /* Make sure we found a value for the symbol. */ | |
1643 | if (p == q || *q == '\0') | |
1644 | return 0; | |
1645 | ||
1646 | decode_address (addrp, p, q - p); | |
fd500816 DJ |
1647 | |
1648 | /* Save the symbol in our cache. */ | |
8d749320 | 1649 | sym = XNEW (struct sym_cache); |
bca929d3 | 1650 | sym->name = xstrdup (name); |
fd500816 | 1651 | sym->addr = *addrp; |
95954743 PA |
1652 | sym->next = proc->symbol_cache; |
1653 | proc->symbol_cache = sym; | |
fd500816 | 1654 | |
2f2893d9 DJ |
1655 | return 1; |
1656 | } | |
c74d0ad8 | 1657 | |
fa593d66 PA |
1658 | /* Relocate an instruction to execute at a different address. OLDLOC |
1659 | is the address in the inferior memory where the instruction to | |
1660 | relocate is currently at. On input, TO points to the destination | |
1661 | where we want the instruction to be copied (and possibly adjusted) | |
1662 | to. On output, it points to one past the end of the resulting | |
1663 | instruction(s). The effect of executing the instruction at TO | |
86a30030 | 1664 | shall be the same as if executing it at OLDLOC. For example, call |
fa593d66 PA |
1665 | instructions that implicitly push the return address on the stack |
1666 | should be adjusted to return to the instruction after OLDLOC; | |
1667 | relative branches, and other PC-relative instructions need the | |
1668 | offset adjusted; etc. Returns 0 on success, -1 on failure. */ | |
1669 | ||
1670 | int | |
1671 | relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc) | |
1672 | { | |
c12a5089 | 1673 | client_state &cs = get_client_state (); |
fa593d66 PA |
1674 | int len; |
1675 | ULONGEST written = 0; | |
1676 | ||
1677 | /* Send the request. */ | |
c12a5089 | 1678 | sprintf (cs.own_buf, "qRelocInsn:%s;%s", paddress (oldloc), |
fa593d66 | 1679 | paddress (*to)); |
c12a5089 | 1680 | if (putpkt (cs.own_buf) < 0) |
fa593d66 PA |
1681 | return -1; |
1682 | ||
1683 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ | |
c12a5089 | 1684 | len = getpkt (cs.own_buf); |
fa593d66 PA |
1685 | if (len < 0) |
1686 | return -1; | |
1687 | ||
1688 | /* We ought to handle pretty much any packet at this point while we | |
1689 | wait for the qRelocInsn "response". That requires re-entering | |
1690 | the main loop. For now, this is an adequate approximation; allow | |
1691 | GDB to access memory. */ | |
c12a5089 | 1692 | while (cs.own_buf[0] == 'm' || cs.own_buf[0] == 'M' || cs.own_buf[0] == 'X') |
fa593d66 PA |
1693 | { |
1694 | CORE_ADDR mem_addr; | |
1695 | unsigned char *mem_buf = NULL; | |
1696 | unsigned int mem_len; | |
1697 | ||
c12a5089 | 1698 | if (cs.own_buf[0] == 'm') |
fa593d66 | 1699 | { |
c12a5089 | 1700 | decode_m_packet (&cs.own_buf[1], &mem_addr, &mem_len); |
224c3ddb | 1701 | mem_buf = (unsigned char *) xmalloc (mem_len); |
fa593d66 | 1702 | if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0) |
c12a5089 | 1703 | bin2hex (mem_buf, cs.own_buf, mem_len); |
fa593d66 | 1704 | else |
c12a5089 | 1705 | write_enn (cs.own_buf); |
fa593d66 | 1706 | } |
c12a5089 | 1707 | else if (cs.own_buf[0] == 'X') |
fa593d66 | 1708 | { |
c12a5089 | 1709 | if (decode_X_packet (&cs.own_buf[1], len - 1, &mem_addr, |
fa593d66 PA |
1710 | &mem_len, &mem_buf) < 0 |
1711 | || write_inferior_memory (mem_addr, mem_buf, mem_len) != 0) | |
c12a5089 | 1712 | write_enn (cs.own_buf); |
fa593d66 | 1713 | else |
c12a5089 | 1714 | write_ok (cs.own_buf); |
fa593d66 PA |
1715 | } |
1716 | else | |
1717 | { | |
c12a5089 | 1718 | decode_M_packet (&cs.own_buf[1], &mem_addr, &mem_len, &mem_buf); |
fa593d66 | 1719 | if (write_inferior_memory (mem_addr, mem_buf, mem_len) == 0) |
c12a5089 | 1720 | write_ok (cs.own_buf); |
fa593d66 | 1721 | else |
c12a5089 | 1722 | write_enn (cs.own_buf); |
fa593d66 PA |
1723 | } |
1724 | free (mem_buf); | |
c12a5089 | 1725 | if (putpkt (cs.own_buf) < 0) |
fa593d66 | 1726 | return -1; |
c12a5089 | 1727 | len = getpkt (cs.own_buf); |
fa593d66 PA |
1728 | if (len < 0) |
1729 | return -1; | |
1730 | } | |
1731 | ||
c12a5089 | 1732 | if (cs.own_buf[0] == 'E') |
fa593d66 PA |
1733 | { |
1734 | warning ("An error occurred while relocating an instruction: %s\n", | |
c12a5089 | 1735 | cs.own_buf); |
fa593d66 PA |
1736 | return -1; |
1737 | } | |
1738 | ||
c12a5089 | 1739 | if (!startswith (cs.own_buf, "qRelocInsn:")) |
fa593d66 PA |
1740 | { |
1741 | warning ("Malformed response to qRelocInsn, ignoring: %s\n", | |
c12a5089 | 1742 | cs.own_buf); |
fa593d66 PA |
1743 | return -1; |
1744 | } | |
1745 | ||
c12a5089 | 1746 | unpack_varlen_hex (cs.own_buf + strlen ("qRelocInsn:"), &written); |
fa593d66 PA |
1747 | |
1748 | *to += written; | |
1749 | return 0; | |
1750 | } | |
1751 | ||
c74d0ad8 | 1752 | void |
bce7165d | 1753 | monitor_output (const char *msg) |
c74d0ad8 | 1754 | { |
0a822afb | 1755 | int len = strlen (msg); |
224c3ddb | 1756 | char *buf = (char *) xmalloc (len * 2 + 2); |
c74d0ad8 DJ |
1757 | |
1758 | buf[0] = 'O'; | |
971dc0b8 | 1759 | bin2hex ((const gdb_byte *) msg, buf + 1, len); |
c74d0ad8 DJ |
1760 | |
1761 | putpkt (buf); | |
1762 | free (buf); | |
1763 | } | |
255e7678 | 1764 | |
0fb4aa4b | 1765 | #endif |