Commit | Line | Data |
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4e772f44 | 1 | /* Generic serial interface routines |
64e6335a | 2 | Copyright 1992, 1993, 1996, 1997 Free Software Foundation, Inc. |
4e772f44 SG |
3 | |
4 | This file is part of GDB. | |
5 | ||
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 | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
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. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
6c9638b4 | 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
4e772f44 SG |
19 | |
20 | #include "defs.h" | |
72ae15f6 | 21 | #include <ctype.h> |
4e772f44 | 22 | #include "serial.h" |
0694bce6 | 23 | #include "gdb_string.h" |
e8f1ad9a | 24 | #include "gdbcmd.h" |
4e772f44 | 25 | |
38dc5e12 | 26 | /* Linked list of serial I/O handlers */ |
4e772f44 SG |
27 | |
28 | static struct serial_ops *serial_ops_list = NULL; | |
29 | ||
38dc5e12 SG |
30 | /* This is the last serial stream opened. Used by connect command. */ |
31 | ||
32 | static serial_t last_serial_opened = NULL; | |
33 | ||
bbcc95bd PS |
34 | /* Pointer to list of scb's. */ |
35 | ||
36 | static serial_t scb_base; | |
37 | ||
e8f1ad9a FF |
38 | /* Non-NULL gives filename which contains a recording of the remote session, |
39 | suitable for playback by gdbserver. */ | |
40 | ||
d9951af4 SG |
41 | static char *serial_logfile = NULL; |
42 | static FILE *serial_logfp = NULL; | |
e8f1ad9a | 43 | |
b607efe7 | 44 | static struct serial_ops *serial_interface_lookup PARAMS ((char *)); |
4ce7ba51 | 45 | static void serial_logchar PARAMS ((int chtype, int ch, int timeout)); |
d9951af4 SG |
46 | static char logbase_hex[] = "hex"; |
47 | static char logbase_octal[] = "octal"; | |
48 | static char logbase_ascii[] = "ascii"; | |
49 | static char *logbase_enums[] = {logbase_hex, logbase_octal, logbase_ascii, NULL}; | |
50 | static char *serial_logbase = logbase_ascii; | |
b607efe7 | 51 | |
e8f1ad9a | 52 | \f |
4ce7ba51 | 53 | static int serial_current_type = 0; |
d9951af4 | 54 | |
4ce7ba51 | 55 | /* Log char CH of type CHTYPE, with TIMEOUT */ |
e8f1ad9a | 56 | |
d9951af4 SG |
57 | /* Define bogus char to represent a BREAK. Should be careful to choose a value |
58 | that can't be confused with a normal char, or an error code. */ | |
59 | #define SERIAL_BREAK 1235 | |
60 | ||
e8f1ad9a | 61 | static void |
4ce7ba51 SG |
62 | serial_logchar (chtype, ch, timeout) |
63 | int chtype; | |
e8f1ad9a | 64 | int ch; |
d9951af4 | 65 | int timeout; |
e8f1ad9a | 66 | { |
4ce7ba51 SG |
67 | if (chtype != serial_current_type) |
68 | { | |
69 | fprintf_unfiltered (serial_logfp, "\n%c ", chtype); | |
70 | serial_current_type = chtype; | |
71 | } | |
72 | ||
d9951af4 SG |
73 | if (serial_logbase != logbase_ascii) |
74 | fputc_unfiltered (' ', serial_logfp); | |
75 | ||
e8f1ad9a FF |
76 | switch (ch) |
77 | { | |
d9951af4 SG |
78 | case SERIAL_TIMEOUT: |
79 | fprintf_unfiltered (serial_logfp, "<Timeout: %d seconds>", timeout); | |
80 | return; | |
81 | case SERIAL_ERROR: | |
82 | fprintf_unfiltered (serial_logfp, "<Error: %s>", safe_strerror (errno)); | |
83 | return; | |
84 | case SERIAL_EOF: | |
85 | fputs_unfiltered ("<Eof>", serial_logfp); | |
86 | return; | |
87 | case SERIAL_BREAK: | |
88 | fputs_unfiltered ("<Break>", serial_logfp); | |
89 | return; | |
90 | default: | |
91 | if (serial_logbase == logbase_hex) | |
92 | fprintf_unfiltered (serial_logfp, "%02x", ch & 0xff); | |
93 | else if (serial_logbase == logbase_octal) | |
94 | fprintf_unfiltered (serial_logfp, "%03o", ch & 0xff); | |
95 | else | |
96 | switch (ch) | |
97 | { | |
98 | case '\\': fputs_unfiltered ("\\\\", serial_logfp); break; | |
99 | case '\b': fputs_unfiltered ("\\b", serial_logfp); break; | |
100 | case '\f': fputs_unfiltered ("\\f", serial_logfp); break; | |
101 | case '\n': fputs_unfiltered ("\\n", serial_logfp); break; | |
102 | case '\r': fputs_unfiltered ("\\r", serial_logfp); break; | |
103 | case '\t': fputs_unfiltered ("\\t", serial_logfp); break; | |
104 | case '\v': fputs_unfiltered ("\\v", serial_logfp); break; | |
105 | default: fprintf_unfiltered (serial_logfp, isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF); break; | |
106 | } | |
4ce7ba51 SG |
107 | } |
108 | } | |
109 | ||
110 | void | |
111 | serial_log_command (cmd) | |
112 | const char *cmd; | |
113 | { | |
114 | if (!serial_logfp) | |
115 | return; | |
116 | ||
117 | serial_current_type = 'c'; | |
118 | ||
64e6335a PS |
119 | fputs_unfiltered ("\nc ", serial_logfp); |
120 | fputs_unfiltered (cmd, serial_logfp); | |
4ce7ba51 SG |
121 | |
122 | /* Make sure that the log file is as up-to-date as possible, | |
123 | in case we are getting ready to dump core or something. */ | |
124 | gdb_flush (serial_logfp); | |
e8f1ad9a FF |
125 | } |
126 | ||
127 | int | |
128 | serial_write (scb, str, len) | |
129 | serial_t scb; | |
130 | const char *str; | |
131 | int len; | |
132 | { | |
e8f1ad9a FF |
133 | if (serial_logfp != NULL) |
134 | { | |
4ce7ba51 SG |
135 | int count; |
136 | ||
e8f1ad9a | 137 | for (count = 0; count < len; count++) |
4ce7ba51 SG |
138 | serial_logchar ('w', str[count] & 0xff, 0); |
139 | ||
e8f1ad9a FF |
140 | /* Make sure that the log file is as up-to-date as possible, |
141 | in case we are getting ready to dump core or something. */ | |
4ce7ba51 | 142 | gdb_flush (serial_logfp); |
e8f1ad9a | 143 | } |
4ce7ba51 | 144 | |
e8f1ad9a FF |
145 | return (scb -> ops -> write (scb, str, len)); |
146 | } | |
147 | ||
148 | int | |
149 | serial_readchar (scb, timeout) | |
150 | serial_t scb; | |
151 | int timeout; | |
152 | { | |
153 | int ch; | |
154 | ||
155 | ch = scb -> ops -> readchar (scb, timeout); | |
156 | if (serial_logfp != NULL) | |
157 | { | |
4ce7ba51 SG |
158 | serial_logchar ('r', ch, timeout); |
159 | ||
e8f1ad9a FF |
160 | /* Make sure that the log file is as up-to-date as possible, |
161 | in case we are getting ready to dump core or something. */ | |
4ce7ba51 | 162 | gdb_flush (serial_logfp); |
e8f1ad9a | 163 | } |
4ce7ba51 | 164 | |
e8f1ad9a FF |
165 | return (ch); |
166 | } | |
167 | ||
d9951af4 SG |
168 | int |
169 | serial_send_break (scb) | |
170 | serial_t scb; | |
171 | { | |
172 | if (serial_logfp != NULL) | |
4ce7ba51 SG |
173 | serial_logchar ('w', SERIAL_BREAK, 0); |
174 | ||
d9951af4 SG |
175 | return (scb -> ops -> send_break (scb)); |
176 | } | |
177 | ||
4e772f44 SG |
178 | static struct serial_ops * |
179 | serial_interface_lookup (name) | |
180 | char *name; | |
181 | { | |
182 | struct serial_ops *ops; | |
183 | ||
184 | for (ops = serial_ops_list; ops; ops = ops->next) | |
185 | if (strcmp (name, ops->name) == 0) | |
186 | return ops; | |
187 | ||
188 | return NULL; | |
189 | } | |
190 | ||
191 | void | |
192 | serial_add_interface(optable) | |
193 | struct serial_ops *optable; | |
194 | { | |
195 | optable->next = serial_ops_list; | |
196 | serial_ops_list = optable; | |
197 | } | |
198 | ||
38dc5e12 SG |
199 | /* Open up a device or a network socket, depending upon the syntax of NAME. */ |
200 | ||
4e772f44 | 201 | serial_t |
55679787 | 202 | serial_open (name) |
4e772f44 SG |
203 | const char *name; |
204 | { | |
205 | serial_t scb; | |
206 | struct serial_ops *ops; | |
207 | ||
4887063b SG |
208 | for (scb = scb_base; scb; scb = scb->next) |
209 | if (scb->name && strcmp (scb->name, name) == 0) | |
210 | { | |
211 | scb->refcnt++; | |
212 | return scb; | |
213 | } | |
214 | ||
55679787 SC |
215 | if (strcmp (name, "pc") == 0) |
216 | ops = serial_interface_lookup ("pc"); | |
217 | else if (strchr (name, ':')) | |
38dc5e12 | 218 | ops = serial_interface_lookup ("tcp"); |
c84e5000 SC |
219 | else if (strncmp (name, "lpt", 3) == 0) |
220 | ops = serial_interface_lookup ("parallel"); | |
38dc5e12 SG |
221 | else |
222 | ops = serial_interface_lookup ("hardwire"); | |
4e772f44 SG |
223 | |
224 | if (!ops) | |
225 | return NULL; | |
226 | ||
227 | scb = (serial_t)xmalloc (sizeof (struct _serial_t)); | |
228 | ||
229 | scb->ops = ops; | |
230 | ||
231 | scb->bufcnt = 0; | |
232 | scb->bufp = scb->buf; | |
233 | ||
4febd102 | 234 | if (scb->ops->open(scb, name)) |
4e772f44 SG |
235 | { |
236 | free (scb); | |
237 | return NULL; | |
238 | } | |
239 | ||
4887063b SG |
240 | scb->name = strsave (name); |
241 | scb->next = scb_base; | |
242 | scb->refcnt = 1; | |
243 | scb_base = scb; | |
244 | ||
38dc5e12 SG |
245 | last_serial_opened = scb; |
246 | ||
e8f1ad9a FF |
247 | if (serial_logfile != NULL) |
248 | { | |
4ce7ba51 | 249 | serial_logfp = gdb_fopen (serial_logfile, "w"); |
e8f1ad9a | 250 | if (serial_logfp == NULL) |
4ce7ba51 | 251 | perror_with_name (serial_logfile); |
e8f1ad9a FF |
252 | } |
253 | ||
38dc5e12 SG |
254 | return scb; |
255 | } | |
256 | ||
257 | serial_t | |
4887063b | 258 | serial_fdopen (fd) |
38dc5e12 SG |
259 | const int fd; |
260 | { | |
261 | serial_t scb; | |
262 | struct serial_ops *ops; | |
263 | ||
4887063b SG |
264 | for (scb = scb_base; scb; scb = scb->next) |
265 | if (scb->fd == fd) | |
266 | { | |
267 | scb->refcnt++; | |
268 | return scb; | |
269 | } | |
270 | ||
38dc5e12 SG |
271 | ops = serial_interface_lookup ("hardwire"); |
272 | ||
273 | if (!ops) | |
274 | return NULL; | |
275 | ||
276 | scb = (serial_t)xmalloc (sizeof (struct _serial_t)); | |
277 | ||
278 | scb->ops = ops; | |
279 | ||
280 | scb->bufcnt = 0; | |
281 | scb->bufp = scb->buf; | |
282 | ||
283 | scb->fd = fd; | |
284 | ||
4887063b SG |
285 | scb->name = NULL; |
286 | scb->next = scb_base; | |
287 | scb->refcnt = 1; | |
288 | scb_base = scb; | |
289 | ||
38dc5e12 SG |
290 | last_serial_opened = scb; |
291 | ||
4e772f44 SG |
292 | return scb; |
293 | } | |
294 | ||
4febd102 | 295 | void |
4ce7ba51 | 296 | serial_close (scb, really_close) |
4febd102 | 297 | serial_t scb; |
bbcc95bd | 298 | int really_close; |
4febd102 | 299 | { |
4887063b SG |
300 | serial_t tmp_scb; |
301 | ||
38dc5e12 SG |
302 | last_serial_opened = NULL; |
303 | ||
e8f1ad9a FF |
304 | if (serial_logfp) |
305 | { | |
4ce7ba51 SG |
306 | fputs_unfiltered ("\nEnd of log\n", serial_logfp); |
307 | serial_current_type = 0; | |
308 | ||
309 | fclose (serial_logfp); /* XXX - What if serial_logfp == stdout or stderr? */ | |
e8f1ad9a FF |
310 | serial_logfp = NULL; |
311 | } | |
312 | ||
a037b21e SG |
313 | /* This is bogus. It's not our fault if you pass us a bad scb...! Rob, you |
314 | should fix your code instead. */ | |
315 | ||
316 | if (!scb) | |
317 | return; | |
318 | ||
4887063b SG |
319 | scb->refcnt--; |
320 | if (scb->refcnt > 0) | |
321 | return; | |
322 | ||
bbcc95bd PS |
323 | if (really_close) |
324 | scb->ops->close (scb); | |
4887063b SG |
325 | |
326 | if (scb->name) | |
327 | free (scb->name); | |
328 | ||
329 | if (scb_base == scb) | |
330 | scb_base = scb_base->next; | |
331 | else | |
332 | for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next) | |
333 | { | |
334 | if (tmp_scb->next != scb) | |
335 | continue; | |
336 | ||
337 | tmp_scb->next = tmp_scb->next->next; | |
338 | break; | |
339 | } | |
340 | ||
a037b21e | 341 | free(scb); |
4febd102 SG |
342 | } |
343 | ||
4e772f44 | 344 | #if 0 |
bf3b8abd JK |
345 | /* |
346 | The connect command is #if 0 because I hadn't thought of an elegant | |
347 | way to wait for I/O on two serial_t's simultaneously. Two solutions | |
348 | came to mind: | |
349 | ||
350 | 1) Fork, and have have one fork handle the to user direction, | |
351 | and have the other hand the to target direction. This | |
352 | obviously won't cut it for MSDOS. | |
353 | ||
354 | 2) Use something like select. This assumes that stdin and | |
355 | the target side can both be waited on via the same | |
356 | mechanism. This may not be true for DOS, if GDB is | |
357 | talking to the target via a TCP socket. | |
358 | -grossman, 8 Jun 93 | |
359 | */ | |
38dc5e12 | 360 | |
4e772f44 SG |
361 | /* Connect the user directly to the remote system. This command acts just like |
362 | the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */ | |
363 | ||
38dc5e12 SG |
364 | static serial_t tty_desc; /* Controlling terminal */ |
365 | ||
4e772f44 SG |
366 | static void |
367 | cleanup_tty(ttystate) | |
38dc5e12 | 368 | serial_ttystate ttystate; |
4e772f44 | 369 | { |
199b2450 | 370 | printf_unfiltered ("\r\n[Exiting connect mode]\r\n"); |
38dc5e12 SG |
371 | SERIAL_SET_TTY_STATE (tty_desc, ttystate); |
372 | free (ttystate); | |
373 | SERIAL_CLOSE (tty_desc); | |
4e772f44 SG |
374 | } |
375 | ||
376 | static void | |
377 | connect_command (args, fromtty) | |
378 | char *args; | |
379 | int fromtty; | |
380 | { | |
4e772f44 SG |
381 | int c; |
382 | char cur_esc = 0; | |
38dc5e12 SG |
383 | serial_ttystate ttystate; |
384 | serial_t port_desc; /* TTY port */ | |
4e772f44 SG |
385 | |
386 | dont_repeat(); | |
387 | ||
4e772f44 | 388 | if (args) |
199b2450 | 389 | fprintf_unfiltered(gdb_stderr, "This command takes no args. They have been ignored.\n"); |
4e772f44 | 390 | |
199b2450 | 391 | printf_unfiltered("[Entering connect mode. Use ~. or ~^D to escape]\n"); |
4e772f44 | 392 | |
38dc5e12 SG |
393 | tty_desc = SERIAL_FDOPEN (0); |
394 | port_desc = last_serial_opened; | |
4e772f44 | 395 | |
38dc5e12 | 396 | ttystate = SERIAL_GET_TTY_STATE (tty_desc); |
4e772f44 | 397 | |
38dc5e12 SG |
398 | SERIAL_RAW (tty_desc); |
399 | SERIAL_RAW (port_desc); | |
400 | ||
401 | make_cleanup (cleanup_tty, ttystate); | |
4e772f44 SG |
402 | |
403 | while (1) | |
404 | { | |
38dc5e12 | 405 | int mask; |
4e772f44 | 406 | |
38dc5e12 | 407 | mask = SERIAL_WAIT_2 (tty_desc, port_desc, -1); |
4e772f44 | 408 | |
38dc5e12 SG |
409 | if (mask & 2) |
410 | { /* tty input */ | |
4e772f44 SG |
411 | char cx; |
412 | ||
38dc5e12 | 413 | while (1) |
4e772f44 | 414 | { |
38dc5e12 SG |
415 | c = SERIAL_READCHAR(tty_desc, 0); |
416 | ||
417 | if (c == SERIAL_TIMEOUT) | |
418 | break; | |
419 | ||
420 | if (c < 0) | |
421 | perror_with_name("connect"); | |
422 | ||
423 | cx = c; | |
424 | SERIAL_WRITE(port_desc, &cx, 1); | |
425 | ||
426 | switch (cur_esc) | |
427 | { | |
428 | case 0: | |
429 | if (c == '\r') | |
430 | cur_esc = c; | |
431 | break; | |
432 | case '\r': | |
433 | if (c == '~') | |
434 | cur_esc = c; | |
435 | else | |
436 | cur_esc = 0; | |
437 | break; | |
438 | case '~': | |
439 | if (c == '.' || c == '\004') | |
440 | return; | |
441 | else | |
442 | cur_esc = 0; | |
443 | } | |
4e772f44 SG |
444 | } |
445 | } | |
446 | ||
38dc5e12 SG |
447 | if (mask & 1) |
448 | { /* Port input */ | |
449 | char cx; | |
450 | ||
4e772f44 SG |
451 | while (1) |
452 | { | |
38dc5e12 SG |
453 | c = SERIAL_READCHAR(port_desc, 0); |
454 | ||
455 | if (c == SERIAL_TIMEOUT) | |
456 | break; | |
457 | ||
4e772f44 | 458 | if (c < 0) |
38dc5e12 SG |
459 | perror_with_name("connect"); |
460 | ||
461 | cx = c; | |
462 | ||
463 | SERIAL_WRITE(tty_desc, &cx, 1); | |
4e772f44 | 464 | } |
4e772f44 SG |
465 | } |
466 | } | |
467 | } | |
976bb0be | 468 | #endif /* 0 */ |
4e772f44 | 469 | |
5c8ba017 SG |
470 | /* VARARGS */ |
471 | void | |
472 | #ifdef ANSI_PROTOTYPES | |
473 | serial_printf (serial_t desc, const char *format, ...) | |
474 | #else | |
475 | serial_printf (va_alist) | |
476 | va_dcl | |
477 | #endif | |
478 | { | |
479 | va_list args; | |
480 | char *buf; | |
481 | #ifdef ANSI_PROTOTYPES | |
482 | va_start (args, format); | |
483 | #else | |
484 | serial_t desc; | |
485 | char *format; | |
486 | ||
487 | va_start (args); | |
488 | desc = va_arg (args, serial_t); | |
489 | format = va_arg (args, char *); | |
490 | #endif | |
491 | ||
492 | vasprintf (&buf, format, args); | |
493 | SERIAL_WRITE (desc, buf, strlen (buf)); | |
494 | ||
495 | free (buf); | |
496 | va_end (args); | |
497 | } | |
498 | ||
4e772f44 SG |
499 | void |
500 | _initialize_serial () | |
501 | { | |
976bb0be | 502 | #if 0 |
4e772f44 SG |
503 | add_com ("connect", class_obscure, connect_command, |
504 | "Connect the terminal directly up to the command monitor.\n\ | |
505 | Use <CR>~. or <CR>~^D to break out."); | |
38dc5e12 | 506 | #endif /* 0 */ |
e8f1ad9a FF |
507 | |
508 | add_show_from_set (add_set_cmd ("remotelogfile", no_class, | |
509 | var_filename, (char *)&serial_logfile, | |
510 | "Set filename for remote session recording.\n\ | |
511 | This file is used to record the remote session for future playback\n\ | |
512 | by gdbserver.", &setlist), | |
513 | &showlist); | |
514 | ||
d9951af4 SG |
515 | add_show_from_set (add_set_enum_cmd ("remotelogbase", no_class, |
516 | logbase_enums, | |
517 | (char *)&serial_logbase, | |
518 | "Set ...", | |
519 | &setlist), | |
520 | &showlist); | |
976bb0be | 521 | } |