Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Remote utility routines for the remote server for GDB. |
0a30fbc4 DJ |
2 | Copyright 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
3 | 2002 | |
b6ba6518 | 4 | Free Software Foundation, Inc. |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
22 | |
23 | #include "server.h" | |
24 | #include "terminal.h" | |
25 | #include <stdio.h> | |
26 | #include <string.h> | |
27 | #include <sys/ioctl.h> | |
28 | #include <sys/file.h> | |
29 | #include <netinet/in.h> | |
30 | #include <sys/socket.h> | |
31 | #include <netdb.h> | |
32 | #include <netinet/tcp.h> | |
33 | #include <sys/ioctl.h> | |
34 | #include <signal.h> | |
35 | #include <fcntl.h> | |
cf30a8e1 C |
36 | #include <sys/time.h> |
37 | #include <unistd.h> | |
c906108c SS |
38 | |
39 | int remote_debug = 0; | |
03863182 | 40 | struct ui_file *gdb_stdlog; |
c906108c SS |
41 | |
42 | static int remote_desc; | |
43 | ||
44 | /* Open a connection to a remote debugger. | |
45 | NAME is the filename used for communication. */ | |
46 | ||
47 | void | |
fba45db2 | 48 | remote_open (char *name) |
c906108c SS |
49 | { |
50 | int save_fcntl_flags; | |
e641a1ca | 51 | |
c906108c SS |
52 | if (!strchr (name, ':')) |
53 | { | |
54 | remote_desc = open (name, O_RDWR); | |
55 | if (remote_desc < 0) | |
56 | perror_with_name ("Could not open remote device"); | |
57 | ||
58 | #ifdef HAVE_TERMIOS | |
59 | { | |
60 | struct termios termios; | |
c5aa993b | 61 | tcgetattr (remote_desc, &termios); |
c906108c SS |
62 | |
63 | termios.c_iflag = 0; | |
64 | termios.c_oflag = 0; | |
65 | termios.c_lflag = 0; | |
c5aa993b | 66 | termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 67 | termios.c_cflag |= CLOCAL | CS8; |
d0608e50 | 68 | termios.c_cc[VMIN] = 1; |
c906108c SS |
69 | termios.c_cc[VTIME] = 0; |
70 | ||
c5aa993b | 71 | tcsetattr (remote_desc, TCSANOW, &termios); |
c906108c SS |
72 | } |
73 | #endif | |
74 | ||
75 | #ifdef HAVE_TERMIO | |
76 | { | |
77 | struct termio termio; | |
78 | ioctl (remote_desc, TCGETA, &termio); | |
79 | ||
80 | termio.c_iflag = 0; | |
81 | termio.c_oflag = 0; | |
82 | termio.c_lflag = 0; | |
c5aa993b | 83 | termio.c_cflag &= ~(CSIZE | PARENB); |
c906108c | 84 | termio.c_cflag |= CLOCAL | CS8; |
d0608e50 | 85 | termio.c_cc[VMIN] = 1; |
c906108c SS |
86 | termio.c_cc[VTIME] = 0; |
87 | ||
88 | ioctl (remote_desc, TCSETA, &termio); | |
89 | } | |
90 | #endif | |
91 | ||
92 | #ifdef HAVE_SGTTY | |
93 | { | |
94 | struct sgttyb sg; | |
95 | ||
96 | ioctl (remote_desc, TIOCGETP, &sg); | |
97 | sg.sg_flags = RAW; | |
98 | ioctl (remote_desc, TIOCSETP, &sg); | |
99 | } | |
100 | #endif | |
101 | ||
e641a1ca | 102 | fprintf (stderr, "Remote debugging using %s\n", name); |
c906108c SS |
103 | } |
104 | else | |
105 | { | |
106 | char *port_str; | |
107 | int port; | |
108 | struct sockaddr_in sockaddr; | |
109 | int tmp; | |
110 | struct protoent *protoent; | |
111 | int tmp_desc; | |
112 | ||
113 | port_str = strchr (name, ':'); | |
114 | ||
115 | port = atoi (port_str + 1); | |
116 | ||
117 | tmp_desc = socket (PF_INET, SOCK_STREAM, 0); | |
118 | if (tmp_desc < 0) | |
119 | perror_with_name ("Can't open socket"); | |
120 | ||
121 | /* Allow rapid reuse of this port. */ | |
122 | tmp = 1; | |
c5aa993b JM |
123 | setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, |
124 | sizeof (tmp)); | |
c906108c SS |
125 | |
126 | sockaddr.sin_family = PF_INET; | |
c5aa993b | 127 | sockaddr.sin_port = htons (port); |
c906108c SS |
128 | sockaddr.sin_addr.s_addr = INADDR_ANY; |
129 | ||
c5aa993b | 130 | if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
c906108c SS |
131 | || listen (tmp_desc, 1)) |
132 | perror_with_name ("Can't bind address"); | |
133 | ||
134 | tmp = sizeof (sockaddr); | |
c5aa993b | 135 | remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp); |
c906108c SS |
136 | if (remote_desc == -1) |
137 | perror_with_name ("Accept failed"); | |
138 | ||
139 | protoent = getprotobyname ("tcp"); | |
140 | if (!protoent) | |
141 | perror_with_name ("getprotobyname"); | |
142 | ||
143 | /* Enable TCP keep alive process. */ | |
144 | tmp = 1; | |
c5aa993b | 145 | setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp)); |
c906108c SS |
146 | |
147 | /* Tell TCP not to delay small packets. This greatly speeds up | |
c5aa993b | 148 | interactive response. */ |
c906108c SS |
149 | tmp = 1; |
150 | setsockopt (remote_desc, protoent->p_proto, TCP_NODELAY, | |
c5aa993b | 151 | (char *) &tmp, sizeof (tmp)); |
c906108c SS |
152 | |
153 | close (tmp_desc); /* No longer need this */ | |
154 | ||
c5aa993b JM |
155 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply |
156 | exits when the remote side dies. */ | |
e641a1ca ML |
157 | |
158 | /* Convert IP address to string. */ | |
159 | fprintf (stderr, "Remote debugging from host %s\n", | |
160 | inet_ntoa (sockaddr.sin_addr)); | |
c906108c SS |
161 | } |
162 | ||
163 | #if defined(F_SETFL) && defined (FASYNC) | |
164 | save_fcntl_flags = fcntl (remote_desc, F_GETFL, 0); | |
165 | fcntl (remote_desc, F_SETFL, save_fcntl_flags | FASYNC); | |
cf30a8e1 C |
166 | #if defined (F_SETOWN) |
167 | fcntl (remote_desc, F_SETOWN, getpid ()); | |
94dfea5d | 168 | #endif |
cf30a8e1 | 169 | #endif |
c906108c | 170 | disable_async_io (); |
c906108c SS |
171 | } |
172 | ||
173 | void | |
fba45db2 | 174 | remote_close (void) |
c906108c SS |
175 | { |
176 | close (remote_desc); | |
177 | } | |
178 | ||
179 | /* Convert hex digit A to a number. */ | |
180 | ||
181 | static int | |
fba45db2 | 182 | fromhex (int a) |
c906108c SS |
183 | { |
184 | if (a >= '0' && a <= '9') | |
185 | return a - '0'; | |
186 | else if (a >= 'a' && a <= 'f') | |
187 | return a - 'a' + 10; | |
188 | else | |
189 | error ("Reply contains invalid hex digit"); | |
0a30fbc4 | 190 | return 0; |
c906108c SS |
191 | } |
192 | ||
193 | /* Convert number NIB to a hex digit. */ | |
194 | ||
195 | static int | |
fba45db2 | 196 | tohex (int nib) |
c906108c SS |
197 | { |
198 | if (nib < 10) | |
199 | return '0' + nib; | |
200 | else | |
201 | return 'a' + nib - 10; | |
202 | } | |
203 | ||
204 | /* Send a packet to the remote machine, with error checking. | |
205 | The data of the packet is in BUF. Returns >= 0 on success, -1 otherwise. */ | |
206 | ||
207 | int | |
fba45db2 | 208 | putpkt (char *buf) |
c906108c SS |
209 | { |
210 | int i; | |
211 | unsigned char csum = 0; | |
0a30fbc4 | 212 | char *buf2; |
c906108c SS |
213 | char buf3[1]; |
214 | int cnt = strlen (buf); | |
215 | char *p; | |
216 | ||
0a30fbc4 DJ |
217 | buf2 = malloc (PBUFSIZ); |
218 | ||
c906108c SS |
219 | /* Copy the packet into buffer BUF2, encapsulating it |
220 | and giving it a checksum. */ | |
221 | ||
222 | p = buf2; | |
223 | *p++ = '$'; | |
224 | ||
225 | for (i = 0; i < cnt; i++) | |
226 | { | |
227 | csum += buf[i]; | |
228 | *p++ = buf[i]; | |
229 | } | |
230 | *p++ = '#'; | |
231 | *p++ = tohex ((csum >> 4) & 0xf); | |
232 | *p++ = tohex (csum & 0xf); | |
233 | ||
234 | *p = '\0'; | |
235 | ||
236 | /* Send it over and over until we get a positive ack. */ | |
237 | ||
238 | do | |
239 | { | |
240 | int cc; | |
241 | ||
242 | if (write (remote_desc, buf2, p - buf2) != p - buf2) | |
243 | { | |
244 | perror ("putpkt(write)"); | |
245 | return -1; | |
246 | } | |
247 | ||
248 | if (remote_debug) | |
249 | printf ("putpkt (\"%s\"); [looking for ack]\n", buf2); | |
250 | cc = read (remote_desc, buf3, 1); | |
251 | if (remote_debug) | |
252 | printf ("[received '%c' (0x%x)]\n", buf3[0], buf3[0]); | |
253 | if (cc <= 0) | |
254 | { | |
255 | if (cc == 0) | |
256 | fprintf (stderr, "putpkt(read): Got EOF\n"); | |
257 | else | |
258 | perror ("putpkt(read)"); | |
259 | ||
0a30fbc4 | 260 | free (buf2); |
c906108c SS |
261 | return -1; |
262 | } | |
263 | } | |
264 | while (buf3[0] != '+'); | |
265 | ||
0a30fbc4 | 266 | free (buf2); |
c906108c SS |
267 | return 1; /* Success! */ |
268 | } | |
269 | ||
270 | /* Come here when we get an input interrupt from the remote side. This | |
271 | interrupt should only be active while we are waiting for the child to do | |
272 | something. About the only thing that should come through is a ^C, which | |
273 | will cause us to send a SIGINT to the child. */ | |
274 | ||
275 | static void | |
0a30fbc4 | 276 | input_interrupt (int unused) |
c906108c | 277 | { |
cf30a8e1 C |
278 | fd_set readset; |
279 | struct timeval immediate = { 0, 0 }; | |
c906108c | 280 | |
cf30a8e1 C |
281 | /* Protect against spurious interrupts. This has been observed to |
282 | be a problem under NetBSD 1.4 and 1.5. */ | |
c906108c | 283 | |
cf30a8e1 C |
284 | FD_ZERO (&readset); |
285 | FD_SET (remote_desc, &readset); | |
286 | if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) | |
c906108c | 287 | { |
cf30a8e1 C |
288 | int cc; |
289 | char c; | |
290 | ||
291 | cc = read (remote_desc, &c, 1); | |
c906108c | 292 | |
cf30a8e1 C |
293 | if (cc != 1 || c != '\003') |
294 | { | |
295 | fprintf (stderr, "input_interrupt, cc = %d c = %d\n", cc, c); | |
296 | return; | |
297 | } | |
298 | ||
299 | kill (inferior_pid, SIGINT); | |
300 | } | |
c906108c SS |
301 | } |
302 | ||
303 | void | |
fba45db2 | 304 | enable_async_io (void) |
c906108c SS |
305 | { |
306 | signal (SIGIO, input_interrupt); | |
307 | } | |
308 | ||
309 | void | |
fba45db2 | 310 | disable_async_io (void) |
c906108c SS |
311 | { |
312 | signal (SIGIO, SIG_IGN); | |
313 | } | |
314 | ||
315 | /* Returns next char from remote GDB. -1 if error. */ | |
316 | ||
317 | static int | |
fba45db2 | 318 | readchar (void) |
c906108c SS |
319 | { |
320 | static char buf[BUFSIZ]; | |
321 | static int bufcnt = 0; | |
322 | static char *bufp; | |
323 | ||
324 | if (bufcnt-- > 0) | |
325 | return *bufp++ & 0x7f; | |
326 | ||
327 | bufcnt = read (remote_desc, buf, sizeof (buf)); | |
328 | ||
329 | if (bufcnt <= 0) | |
330 | { | |
331 | if (bufcnt == 0) | |
332 | fprintf (stderr, "readchar: Got EOF\n"); | |
333 | else | |
334 | perror ("readchar"); | |
335 | ||
336 | return -1; | |
337 | } | |
338 | ||
339 | bufp = buf; | |
340 | bufcnt--; | |
341 | return *bufp++ & 0x7f; | |
342 | } | |
343 | ||
344 | /* Read a packet from the remote machine, with error checking, | |
345 | and store it in BUF. Returns length of packet, or negative if error. */ | |
346 | ||
347 | int | |
fba45db2 | 348 | getpkt (char *buf) |
c906108c SS |
349 | { |
350 | char *bp; | |
351 | unsigned char csum, c1, c2; | |
352 | int c; | |
353 | ||
354 | while (1) | |
355 | { | |
356 | csum = 0; | |
357 | ||
358 | while (1) | |
359 | { | |
360 | c = readchar (); | |
361 | if (c == '$') | |
362 | break; | |
363 | if (remote_debug) | |
364 | printf ("[getpkt: discarding char '%c']\n", c); | |
365 | if (c < 0) | |
366 | return -1; | |
367 | } | |
368 | ||
369 | bp = buf; | |
370 | while (1) | |
371 | { | |
372 | c = readchar (); | |
373 | if (c < 0) | |
374 | return -1; | |
375 | if (c == '#') | |
376 | break; | |
377 | *bp++ = c; | |
378 | csum += c; | |
379 | } | |
380 | *bp = 0; | |
381 | ||
382 | c1 = fromhex (readchar ()); | |
383 | c2 = fromhex (readchar ()); | |
c5aa993b | 384 | |
c906108c SS |
385 | if (csum == (c1 << 4) + c2) |
386 | break; | |
387 | ||
388 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", | |
389 | (c1 << 4) + c2, csum, buf); | |
390 | write (remote_desc, "-", 1); | |
391 | } | |
392 | ||
393 | if (remote_debug) | |
394 | printf ("getpkt (\"%s\"); [sending ack] \n", buf); | |
395 | ||
396 | write (remote_desc, "+", 1); | |
397 | ||
398 | if (remote_debug) | |
399 | printf ("[sent ack]\n"); | |
400 | return bp - buf; | |
401 | } | |
402 | ||
403 | void | |
fba45db2 | 404 | write_ok (char *buf) |
c906108c SS |
405 | { |
406 | buf[0] = 'O'; | |
407 | buf[1] = 'K'; | |
408 | buf[2] = '\0'; | |
409 | } | |
410 | ||
411 | void | |
fba45db2 | 412 | write_enn (char *buf) |
c906108c SS |
413 | { |
414 | buf[0] = 'E'; | |
415 | buf[1] = 'N'; | |
416 | buf[2] = 'N'; | |
417 | buf[3] = '\0'; | |
418 | } | |
419 | ||
420 | void | |
fba45db2 | 421 | convert_int_to_ascii (char *from, char *to, int n) |
c906108c SS |
422 | { |
423 | int nib; | |
424 | char ch; | |
425 | while (n--) | |
426 | { | |
427 | ch = *from++; | |
428 | nib = ((ch & 0xf0) >> 4) & 0x0f; | |
429 | *to++ = tohex (nib); | |
430 | nib = ch & 0x0f; | |
431 | *to++ = tohex (nib); | |
432 | } | |
433 | *to++ = 0; | |
434 | } | |
435 | ||
436 | ||
437 | void | |
fba45db2 | 438 | convert_ascii_to_int (char *from, char *to, int n) |
c906108c SS |
439 | { |
440 | int nib1, nib2; | |
441 | while (n--) | |
442 | { | |
443 | nib1 = fromhex (*from++); | |
444 | nib2 = fromhex (*from++); | |
445 | *to++ = (((nib1 & 0x0f) << 4) & 0xf0) | (nib2 & 0x0f); | |
446 | } | |
447 | } | |
448 | ||
449 | static char * | |
fba45db2 | 450 | outreg (int regno, char *buf) |
c906108c | 451 | { |
0a30fbc4 | 452 | int regsize = register_size (regno); |
c906108c | 453 | |
5c44784c JM |
454 | if ((regno >> 12) != 0) |
455 | *buf++ = tohex ((regno >> 12) & 0xf); | |
456 | if ((regno >> 8) != 0) | |
457 | *buf++ = tohex ((regno >> 8) & 0xf); | |
458 | *buf++ = tohex ((regno >> 4) & 0xf); | |
c906108c SS |
459 | *buf++ = tohex (regno & 0xf); |
460 | *buf++ = ':'; | |
0a30fbc4 | 461 | convert_int_to_ascii (register_data (regno), buf, regsize); |
c906108c SS |
462 | buf += 2 * regsize; |
463 | *buf++ = ';'; | |
464 | ||
465 | return buf; | |
466 | } | |
467 | ||
468 | void | |
fba45db2 | 469 | prepare_resume_reply (char *buf, char status, unsigned char signo) |
c906108c SS |
470 | { |
471 | int nib; | |
472 | ||
473 | *buf++ = status; | |
474 | ||
475 | /* FIXME! Should be converting this signal number (numbered | |
476 | according to the signal numbering of the system we are running on) | |
477 | to the signal numbers used by the gdb protocol (see enum target_signal | |
478 | in gdb/target.h). */ | |
479 | nib = ((signo & 0xf0) >> 4); | |
480 | *buf++ = tohex (nib); | |
481 | nib = signo & 0x0f; | |
482 | *buf++ = tohex (nib); | |
483 | ||
484 | if (status == 'T') | |
485 | { | |
0a30fbc4 DJ |
486 | const char **regp = gdbserver_expedite_regs; |
487 | while (*regp) | |
5c44784c | 488 | { |
0a30fbc4 DJ |
489 | buf = outreg (find_regno (*regp), buf); |
490 | regp ++; | |
5c44784c | 491 | } |
c906108c SS |
492 | |
493 | /* If the debugger hasn't used any thread features, don't burden it with | |
0a30fbc4 | 494 | threads. If we didn't check this, GDB 4.13 and older would choke. */ |
c906108c SS |
495 | if (cont_thread != 0) |
496 | { | |
497 | if (old_thread_from_wait != thread_from_wait) | |
498 | { | |
499 | sprintf (buf, "thread:%x;", thread_from_wait); | |
500 | buf += strlen (buf); | |
501 | old_thread_from_wait = thread_from_wait; | |
502 | } | |
503 | } | |
504 | } | |
505 | /* For W and X, we're done. */ | |
506 | *buf++ = 0; | |
507 | } | |
508 | ||
509 | void | |
fba45db2 | 510 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
c906108c SS |
511 | { |
512 | int i = 0, j = 0; | |
513 | char ch; | |
514 | *mem_addr_ptr = *len_ptr = 0; | |
515 | ||
516 | while ((ch = from[i++]) != ',') | |
517 | { | |
518 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
519 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
520 | } | |
521 | ||
522 | for (j = 0; j < 4; j++) | |
523 | { | |
524 | if ((ch = from[i++]) == 0) | |
525 | break; | |
526 | *len_ptr = *len_ptr << 4; | |
527 | *len_ptr |= fromhex (ch) & 0x0f; | |
528 | } | |
529 | } | |
530 | ||
531 | void | |
fba45db2 KB |
532 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
533 | char *to) | |
c906108c SS |
534 | { |
535 | int i = 0; | |
536 | char ch; | |
537 | *mem_addr_ptr = *len_ptr = 0; | |
538 | ||
539 | while ((ch = from[i++]) != ',') | |
540 | { | |
541 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
542 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
543 | } | |
544 | ||
545 | while ((ch = from[i++]) != ':') | |
546 | { | |
547 | *len_ptr = *len_ptr << 4; | |
548 | *len_ptr |= fromhex (ch) & 0x0f; | |
549 | } | |
550 | ||
551 | convert_ascii_to_int (&from[i++], to, *len_ptr); | |
552 | } |