Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Remote utility routines for the remote server for GDB. |
b6ba6518 KB |
2 | Copyright 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 |
3 | Free Software Foundation, Inc. | |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
21 | |
22 | #include "server.h" | |
23 | #include "terminal.h" | |
24 | #include <stdio.h> | |
25 | #include <string.h> | |
26 | #include <sys/ioctl.h> | |
27 | #include <sys/file.h> | |
28 | #include <netinet/in.h> | |
29 | #include <sys/socket.h> | |
30 | #include <netdb.h> | |
31 | #include <netinet/tcp.h> | |
32 | #include <sys/ioctl.h> | |
33 | #include <signal.h> | |
34 | #include <fcntl.h> | |
35 | ||
36 | int remote_debug = 0; | |
03863182 | 37 | struct ui_file *gdb_stdlog; |
c906108c SS |
38 | |
39 | static int remote_desc; | |
40 | ||
41 | /* Open a connection to a remote debugger. | |
42 | NAME is the filename used for communication. */ | |
43 | ||
44 | void | |
fba45db2 | 45 | remote_open (char *name) |
c906108c SS |
46 | { |
47 | int save_fcntl_flags; | |
48 | ||
49 | if (!strchr (name, ':')) | |
50 | { | |
51 | remote_desc = open (name, O_RDWR); | |
52 | if (remote_desc < 0) | |
53 | perror_with_name ("Could not open remote device"); | |
54 | ||
55 | #ifdef HAVE_TERMIOS | |
56 | { | |
57 | struct termios termios; | |
c5aa993b | 58 | tcgetattr (remote_desc, &termios); |
c906108c SS |
59 | |
60 | termios.c_iflag = 0; | |
61 | termios.c_oflag = 0; | |
62 | termios.c_lflag = 0; | |
c5aa993b | 63 | termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c SS |
64 | termios.c_cflag |= CLOCAL | CS8; |
65 | termios.c_cc[VMIN] = 0; | |
66 | termios.c_cc[VTIME] = 0; | |
67 | ||
c5aa993b | 68 | tcsetattr (remote_desc, TCSANOW, &termios); |
c906108c SS |
69 | } |
70 | #endif | |
71 | ||
72 | #ifdef HAVE_TERMIO | |
73 | { | |
74 | struct termio termio; | |
75 | ioctl (remote_desc, TCGETA, &termio); | |
76 | ||
77 | termio.c_iflag = 0; | |
78 | termio.c_oflag = 0; | |
79 | termio.c_lflag = 0; | |
c5aa993b | 80 | termio.c_cflag &= ~(CSIZE | PARENB); |
c906108c SS |
81 | termio.c_cflag |= CLOCAL | CS8; |
82 | termio.c_cc[VMIN] = 0; | |
83 | termio.c_cc[VTIME] = 0; | |
84 | ||
85 | ioctl (remote_desc, TCSETA, &termio); | |
86 | } | |
87 | #endif | |
88 | ||
89 | #ifdef HAVE_SGTTY | |
90 | { | |
91 | struct sgttyb sg; | |
92 | ||
93 | ioctl (remote_desc, TIOCGETP, &sg); | |
94 | sg.sg_flags = RAW; | |
95 | ioctl (remote_desc, TIOCSETP, &sg); | |
96 | } | |
97 | #endif | |
98 | ||
99 | ||
100 | } | |
101 | else | |
102 | { | |
103 | char *port_str; | |
104 | int port; | |
105 | struct sockaddr_in sockaddr; | |
106 | int tmp; | |
107 | struct protoent *protoent; | |
108 | int tmp_desc; | |
109 | ||
110 | port_str = strchr (name, ':'); | |
111 | ||
112 | port = atoi (port_str + 1); | |
113 | ||
114 | tmp_desc = socket (PF_INET, SOCK_STREAM, 0); | |
115 | if (tmp_desc < 0) | |
116 | perror_with_name ("Can't open socket"); | |
117 | ||
118 | /* Allow rapid reuse of this port. */ | |
119 | tmp = 1; | |
c5aa993b JM |
120 | setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, |
121 | sizeof (tmp)); | |
c906108c SS |
122 | |
123 | sockaddr.sin_family = PF_INET; | |
c5aa993b | 124 | sockaddr.sin_port = htons (port); |
c906108c SS |
125 | sockaddr.sin_addr.s_addr = INADDR_ANY; |
126 | ||
c5aa993b | 127 | if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
c906108c SS |
128 | || listen (tmp_desc, 1)) |
129 | perror_with_name ("Can't bind address"); | |
130 | ||
131 | tmp = sizeof (sockaddr); | |
c5aa993b | 132 | remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp); |
c906108c SS |
133 | if (remote_desc == -1) |
134 | perror_with_name ("Accept failed"); | |
135 | ||
136 | protoent = getprotobyname ("tcp"); | |
137 | if (!protoent) | |
138 | perror_with_name ("getprotobyname"); | |
139 | ||
140 | /* Enable TCP keep alive process. */ | |
141 | tmp = 1; | |
c5aa993b | 142 | setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp)); |
c906108c SS |
143 | |
144 | /* Tell TCP not to delay small packets. This greatly speeds up | |
c5aa993b | 145 | interactive response. */ |
c906108c SS |
146 | tmp = 1; |
147 | setsockopt (remote_desc, protoent->p_proto, TCP_NODELAY, | |
c5aa993b | 148 | (char *) &tmp, sizeof (tmp)); |
c906108c SS |
149 | |
150 | close (tmp_desc); /* No longer need this */ | |
151 | ||
c5aa993b JM |
152 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply |
153 | exits when the remote side dies. */ | |
c906108c SS |
154 | } |
155 | ||
156 | #if defined(F_SETFL) && defined (FASYNC) | |
157 | save_fcntl_flags = fcntl (remote_desc, F_GETFL, 0); | |
158 | fcntl (remote_desc, F_SETFL, save_fcntl_flags | FASYNC); | |
159 | disable_async_io (); | |
160 | #endif /* FASYNC */ | |
161 | fprintf (stderr, "Remote debugging using %s\n", name); | |
162 | } | |
163 | ||
164 | void | |
fba45db2 | 165 | remote_close (void) |
c906108c SS |
166 | { |
167 | close (remote_desc); | |
168 | } | |
169 | ||
170 | /* Convert hex digit A to a number. */ | |
171 | ||
172 | static int | |
fba45db2 | 173 | fromhex (int a) |
c906108c SS |
174 | { |
175 | if (a >= '0' && a <= '9') | |
176 | return a - '0'; | |
177 | else if (a >= 'a' && a <= 'f') | |
178 | return a - 'a' + 10; | |
179 | else | |
180 | error ("Reply contains invalid hex digit"); | |
181 | } | |
182 | ||
183 | /* Convert number NIB to a hex digit. */ | |
184 | ||
185 | static int | |
fba45db2 | 186 | tohex (int nib) |
c906108c SS |
187 | { |
188 | if (nib < 10) | |
189 | return '0' + nib; | |
190 | else | |
191 | return 'a' + nib - 10; | |
192 | } | |
193 | ||
194 | /* Send a packet to the remote machine, with error checking. | |
195 | The data of the packet is in BUF. Returns >= 0 on success, -1 otherwise. */ | |
196 | ||
197 | int | |
fba45db2 | 198 | putpkt (char *buf) |
c906108c SS |
199 | { |
200 | int i; | |
201 | unsigned char csum = 0; | |
5c44784c | 202 | char buf2[PBUFSIZ]; |
c906108c SS |
203 | char buf3[1]; |
204 | int cnt = strlen (buf); | |
205 | char *p; | |
206 | ||
207 | /* Copy the packet into buffer BUF2, encapsulating it | |
208 | and giving it a checksum. */ | |
209 | ||
210 | p = buf2; | |
211 | *p++ = '$'; | |
212 | ||
213 | for (i = 0; i < cnt; i++) | |
214 | { | |
215 | csum += buf[i]; | |
216 | *p++ = buf[i]; | |
217 | } | |
218 | *p++ = '#'; | |
219 | *p++ = tohex ((csum >> 4) & 0xf); | |
220 | *p++ = tohex (csum & 0xf); | |
221 | ||
222 | *p = '\0'; | |
223 | ||
224 | /* Send it over and over until we get a positive ack. */ | |
225 | ||
226 | do | |
227 | { | |
228 | int cc; | |
229 | ||
230 | if (write (remote_desc, buf2, p - buf2) != p - buf2) | |
231 | { | |
232 | perror ("putpkt(write)"); | |
233 | return -1; | |
234 | } | |
235 | ||
236 | if (remote_debug) | |
237 | printf ("putpkt (\"%s\"); [looking for ack]\n", buf2); | |
238 | cc = read (remote_desc, buf3, 1); | |
239 | if (remote_debug) | |
240 | printf ("[received '%c' (0x%x)]\n", buf3[0], buf3[0]); | |
241 | if (cc <= 0) | |
242 | { | |
243 | if (cc == 0) | |
244 | fprintf (stderr, "putpkt(read): Got EOF\n"); | |
245 | else | |
246 | perror ("putpkt(read)"); | |
247 | ||
248 | return -1; | |
249 | } | |
250 | } | |
251 | while (buf3[0] != '+'); | |
252 | ||
253 | return 1; /* Success! */ | |
254 | } | |
255 | ||
256 | /* Come here when we get an input interrupt from the remote side. This | |
257 | interrupt should only be active while we are waiting for the child to do | |
258 | something. About the only thing that should come through is a ^C, which | |
259 | will cause us to send a SIGINT to the child. */ | |
260 | ||
261 | static void | |
fba45db2 | 262 | input_interrupt (void) |
c906108c SS |
263 | { |
264 | int cc; | |
265 | char c; | |
266 | ||
267 | cc = read (remote_desc, &c, 1); | |
268 | ||
269 | if (cc != 1 || c != '\003') | |
270 | { | |
c5aa993b | 271 | fprintf (stderr, "input_interrupt, cc = %d c = %d\n", cc, c); |
c906108c SS |
272 | return; |
273 | } | |
274 | ||
275 | kill (inferior_pid, SIGINT); | |
276 | } | |
277 | ||
278 | void | |
fba45db2 | 279 | enable_async_io (void) |
c906108c SS |
280 | { |
281 | signal (SIGIO, input_interrupt); | |
282 | } | |
283 | ||
284 | void | |
fba45db2 | 285 | disable_async_io (void) |
c906108c SS |
286 | { |
287 | signal (SIGIO, SIG_IGN); | |
288 | } | |
289 | ||
290 | /* Returns next char from remote GDB. -1 if error. */ | |
291 | ||
292 | static int | |
fba45db2 | 293 | readchar (void) |
c906108c SS |
294 | { |
295 | static char buf[BUFSIZ]; | |
296 | static int bufcnt = 0; | |
297 | static char *bufp; | |
298 | ||
299 | if (bufcnt-- > 0) | |
300 | return *bufp++ & 0x7f; | |
301 | ||
302 | bufcnt = read (remote_desc, buf, sizeof (buf)); | |
303 | ||
304 | if (bufcnt <= 0) | |
305 | { | |
306 | if (bufcnt == 0) | |
307 | fprintf (stderr, "readchar: Got EOF\n"); | |
308 | else | |
309 | perror ("readchar"); | |
310 | ||
311 | return -1; | |
312 | } | |
313 | ||
314 | bufp = buf; | |
315 | bufcnt--; | |
316 | return *bufp++ & 0x7f; | |
317 | } | |
318 | ||
319 | /* Read a packet from the remote machine, with error checking, | |
320 | and store it in BUF. Returns length of packet, or negative if error. */ | |
321 | ||
322 | int | |
fba45db2 | 323 | getpkt (char *buf) |
c906108c SS |
324 | { |
325 | char *bp; | |
326 | unsigned char csum, c1, c2; | |
327 | int c; | |
328 | ||
329 | while (1) | |
330 | { | |
331 | csum = 0; | |
332 | ||
333 | while (1) | |
334 | { | |
335 | c = readchar (); | |
336 | if (c == '$') | |
337 | break; | |
338 | if (remote_debug) | |
339 | printf ("[getpkt: discarding char '%c']\n", c); | |
340 | if (c < 0) | |
341 | return -1; | |
342 | } | |
343 | ||
344 | bp = buf; | |
345 | while (1) | |
346 | { | |
347 | c = readchar (); | |
348 | if (c < 0) | |
349 | return -1; | |
350 | if (c == '#') | |
351 | break; | |
352 | *bp++ = c; | |
353 | csum += c; | |
354 | } | |
355 | *bp = 0; | |
356 | ||
357 | c1 = fromhex (readchar ()); | |
358 | c2 = fromhex (readchar ()); | |
c5aa993b | 359 | |
c906108c SS |
360 | if (csum == (c1 << 4) + c2) |
361 | break; | |
362 | ||
363 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", | |
364 | (c1 << 4) + c2, csum, buf); | |
365 | write (remote_desc, "-", 1); | |
366 | } | |
367 | ||
368 | if (remote_debug) | |
369 | printf ("getpkt (\"%s\"); [sending ack] \n", buf); | |
370 | ||
371 | write (remote_desc, "+", 1); | |
372 | ||
373 | if (remote_debug) | |
374 | printf ("[sent ack]\n"); | |
375 | return bp - buf; | |
376 | } | |
377 | ||
378 | void | |
fba45db2 | 379 | write_ok (char *buf) |
c906108c SS |
380 | { |
381 | buf[0] = 'O'; | |
382 | buf[1] = 'K'; | |
383 | buf[2] = '\0'; | |
384 | } | |
385 | ||
386 | void | |
fba45db2 | 387 | write_enn (char *buf) |
c906108c SS |
388 | { |
389 | buf[0] = 'E'; | |
390 | buf[1] = 'N'; | |
391 | buf[2] = 'N'; | |
392 | buf[3] = '\0'; | |
393 | } | |
394 | ||
395 | void | |
fba45db2 | 396 | convert_int_to_ascii (char *from, char *to, int n) |
c906108c SS |
397 | { |
398 | int nib; | |
399 | char ch; | |
400 | while (n--) | |
401 | { | |
402 | ch = *from++; | |
403 | nib = ((ch & 0xf0) >> 4) & 0x0f; | |
404 | *to++ = tohex (nib); | |
405 | nib = ch & 0x0f; | |
406 | *to++ = tohex (nib); | |
407 | } | |
408 | *to++ = 0; | |
409 | } | |
410 | ||
411 | ||
412 | void | |
fba45db2 | 413 | convert_ascii_to_int (char *from, char *to, int n) |
c906108c SS |
414 | { |
415 | int nib1, nib2; | |
416 | while (n--) | |
417 | { | |
418 | nib1 = fromhex (*from++); | |
419 | nib2 = fromhex (*from++); | |
420 | *to++ = (((nib1 & 0x0f) << 4) & 0xf0) | (nib2 & 0x0f); | |
421 | } | |
422 | } | |
423 | ||
424 | static char * | |
fba45db2 | 425 | outreg (int regno, char *buf) |
c906108c | 426 | { |
c906108c SS |
427 | int regsize = REGISTER_RAW_SIZE (regno); |
428 | ||
5c44784c JM |
429 | if ((regno >> 12) != 0) |
430 | *buf++ = tohex ((regno >> 12) & 0xf); | |
431 | if ((regno >> 8) != 0) | |
432 | *buf++ = tohex ((regno >> 8) & 0xf); | |
433 | *buf++ = tohex ((regno >> 4) & 0xf); | |
c906108c SS |
434 | *buf++ = tohex (regno & 0xf); |
435 | *buf++ = ':'; | |
436 | convert_int_to_ascii (®isters[REGISTER_BYTE (regno)], buf, regsize); | |
437 | buf += 2 * regsize; | |
438 | *buf++ = ';'; | |
439 | ||
440 | return buf; | |
441 | } | |
442 | ||
443 | void | |
fba45db2 | 444 | prepare_resume_reply (char *buf, char status, unsigned char signo) |
c906108c SS |
445 | { |
446 | int nib; | |
447 | ||
448 | *buf++ = status; | |
449 | ||
450 | /* FIXME! Should be converting this signal number (numbered | |
451 | according to the signal numbering of the system we are running on) | |
452 | to the signal numbers used by the gdb protocol (see enum target_signal | |
453 | in gdb/target.h). */ | |
454 | nib = ((signo & 0xf0) >> 4); | |
455 | *buf++ = tohex (nib); | |
456 | nib = signo & 0x0f; | |
457 | *buf++ = tohex (nib); | |
458 | ||
459 | if (status == 'T') | |
460 | { | |
5c44784c JM |
461 | #ifdef GDBSERVER_RESUME_REGS |
462 | static int gdbserver_resume_regs[] = GDBSERVER_RESUME_REGS ; | |
463 | int i; | |
464 | for (i = 0; | |
465 | i < sizeof (gdbserver_resume_regs) | |
466 | / sizeof (gdbserver_resume_regs[0]); | |
467 | i++) | |
468 | { | |
469 | int regnum = gdbserver_resume_regs[i]; | |
470 | buf = outreg (regnum, buf); | |
471 | } | |
472 | #else /* !defined(GDBSERVER_RESUME_REGS) */ | |
c906108c SS |
473 | buf = outreg (PC_REGNUM, buf); |
474 | buf = outreg (FP_REGNUM, buf); | |
475 | buf = outreg (SP_REGNUM, buf); | |
03863182 AC |
476 | if (NPC_REGNUM >= 0) |
477 | buf = outreg (NPC_REGNUM, buf); | |
c906108c SS |
478 | #ifdef O7_REGNUM |
479 | buf = outreg (O7_REGNUM, buf); | |
480 | #endif | |
5c44784c | 481 | #endif /* GDBSERVER_RESUME_REGS */ |
c906108c SS |
482 | |
483 | /* If the debugger hasn't used any thread features, don't burden it with | |
c5aa993b | 484 | threads. If we didn't check this, GDB 4.13 and older would choke. */ |
c906108c SS |
485 | if (cont_thread != 0) |
486 | { | |
487 | if (old_thread_from_wait != thread_from_wait) | |
488 | { | |
489 | sprintf (buf, "thread:%x;", thread_from_wait); | |
490 | buf += strlen (buf); | |
491 | old_thread_from_wait = thread_from_wait; | |
492 | } | |
493 | } | |
494 | } | |
495 | /* For W and X, we're done. */ | |
496 | *buf++ = 0; | |
497 | } | |
498 | ||
499 | void | |
fba45db2 | 500 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
c906108c SS |
501 | { |
502 | int i = 0, j = 0; | |
503 | char ch; | |
504 | *mem_addr_ptr = *len_ptr = 0; | |
505 | ||
506 | while ((ch = from[i++]) != ',') | |
507 | { | |
508 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
509 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
510 | } | |
511 | ||
512 | for (j = 0; j < 4; j++) | |
513 | { | |
514 | if ((ch = from[i++]) == 0) | |
515 | break; | |
516 | *len_ptr = *len_ptr << 4; | |
517 | *len_ptr |= fromhex (ch) & 0x0f; | |
518 | } | |
519 | } | |
520 | ||
521 | void | |
fba45db2 KB |
522 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
523 | char *to) | |
c906108c SS |
524 | { |
525 | int i = 0; | |
526 | char ch; | |
527 | *mem_addr_ptr = *len_ptr = 0; | |
528 | ||
529 | while ((ch = from[i++]) != ',') | |
530 | { | |
531 | *mem_addr_ptr = *mem_addr_ptr << 4; | |
532 | *mem_addr_ptr |= fromhex (ch) & 0x0f; | |
533 | } | |
534 | ||
535 | while ((ch = from[i++]) != ':') | |
536 | { | |
537 | *len_ptr = *len_ptr << 4; | |
538 | *len_ptr |= fromhex (ch) & 0x0f; | |
539 | } | |
540 | ||
541 | convert_ascii_to_int (&from[i++], to, *len_ptr); | |
542 | } |