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Commit | Line | Data |
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c906108c | 1 | /* Serial interface for local (hardwired) serial ports on Un*x like systems |
1e4728e7 | 2 | |
6aba47ca DJ |
3 | Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2003, |
4 | 2004, 2005, 2007 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 | |
197e01b6 EZ |
20 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "serial.h" | |
3eb25fda | 25 | #include "ser-base.h" |
c2c6d25f JM |
26 | #include "ser-unix.h" |
27 | ||
c906108c SS |
28 | #include <fcntl.h> |
29 | #include <sys/types.h> | |
30 | #include "terminal.h" | |
c2c6d25f JM |
31 | #include <sys/socket.h> |
32 | #include <sys/time.h> | |
33 | ||
0ea3f30e | 34 | #include "gdb_select.h" |
c2c6d25f | 35 | #include "gdb_string.h" |
c2c6d25f | 36 | |
c906108c SS |
37 | #ifdef HAVE_TERMIOS |
38 | ||
39 | struct hardwire_ttystate | |
c5aa993b JM |
40 | { |
41 | struct termios termios; | |
42 | }; | |
c906108c SS |
43 | #endif /* termios */ |
44 | ||
45 | #ifdef HAVE_TERMIO | |
46 | ||
47 | /* It is believed that all systems which have added job control to SVR3 | |
48 | (e.g. sco) have also added termios. Even if not, trying to figure out | |
49 | all the variations (TIOCGPGRP vs. TCGETPGRP, etc.) would be pretty | |
50 | bewildering. So we don't attempt it. */ | |
51 | ||
52 | struct hardwire_ttystate | |
c5aa993b JM |
53 | { |
54 | struct termio termio; | |
55 | }; | |
c906108c SS |
56 | #endif /* termio */ |
57 | ||
58 | #ifdef HAVE_SGTTY | |
c906108c | 59 | struct hardwire_ttystate |
c5aa993b JM |
60 | { |
61 | struct sgttyb sgttyb; | |
62 | struct tchars tc; | |
63 | struct ltchars ltc; | |
64 | /* Line discipline flags. */ | |
65 | int lmode; | |
66 | }; | |
c906108c SS |
67 | #endif /* sgtty */ |
68 | ||
819cc324 AC |
69 | static int hardwire_open (struct serial *scb, const char *name); |
70 | static void hardwire_raw (struct serial *scb); | |
71 | static int wait_for (struct serial *scb, int timeout); | |
72 | static int hardwire_readchar (struct serial *scb, int timeout); | |
73 | static int do_hardwire_readchar (struct serial *scb, int timeout); | |
c2c6d25f | 74 | static int rate_to_code (int rate); |
819cc324 AC |
75 | static int hardwire_setbaudrate (struct serial *scb, int rate); |
76 | static void hardwire_close (struct serial *scb); | |
77 | static int get_tty_state (struct serial *scb, | |
78 | struct hardwire_ttystate * state); | |
79 | static int set_tty_state (struct serial *scb, | |
80 | struct hardwire_ttystate * state); | |
81 | static serial_ttystate hardwire_get_tty_state (struct serial *scb); | |
82 | static int hardwire_set_tty_state (struct serial *scb, serial_ttystate state); | |
83 | static int hardwire_noflush_set_tty_state (struct serial *, serial_ttystate, | |
84 | serial_ttystate); | |
85 | static void hardwire_print_tty_state (struct serial *, serial_ttystate, | |
86 | struct ui_file *); | |
87 | static int hardwire_drain_output (struct serial *); | |
88 | static int hardwire_flush_output (struct serial *); | |
89 | static int hardwire_flush_input (struct serial *); | |
90 | static int hardwire_send_break (struct serial *); | |
91 | static int hardwire_setstopbits (struct serial *, int); | |
92 | ||
c2c6d25f JM |
93 | void _initialize_ser_hardwire (void); |
94 | ||
c906108c SS |
95 | /* Open up a real live device for serial I/O */ |
96 | ||
97 | static int | |
819cc324 | 98 | hardwire_open (struct serial *scb, const char *name) |
c906108c SS |
99 | { |
100 | scb->fd = open (name, O_RDWR); | |
101 | if (scb->fd < 0) | |
102 | return -1; | |
103 | ||
104 | return 0; | |
105 | } | |
106 | ||
107 | static int | |
819cc324 | 108 | get_tty_state (struct serial *scb, struct hardwire_ttystate *state) |
c906108c SS |
109 | { |
110 | #ifdef HAVE_TERMIOS | |
c5aa993b | 111 | if (tcgetattr (scb->fd, &state->termios) < 0) |
c906108c SS |
112 | return -1; |
113 | ||
114 | return 0; | |
115 | #endif | |
116 | ||
117 | #ifdef HAVE_TERMIO | |
118 | if (ioctl (scb->fd, TCGETA, &state->termio) < 0) | |
119 | return -1; | |
120 | return 0; | |
121 | #endif | |
122 | ||
123 | #ifdef HAVE_SGTTY | |
124 | if (ioctl (scb->fd, TIOCGETP, &state->sgttyb) < 0) | |
125 | return -1; | |
126 | if (ioctl (scb->fd, TIOCGETC, &state->tc) < 0) | |
127 | return -1; | |
128 | if (ioctl (scb->fd, TIOCGLTC, &state->ltc) < 0) | |
129 | return -1; | |
130 | if (ioctl (scb->fd, TIOCLGET, &state->lmode) < 0) | |
131 | return -1; | |
132 | ||
133 | return 0; | |
134 | #endif | |
135 | } | |
136 | ||
137 | static int | |
819cc324 | 138 | set_tty_state (struct serial *scb, struct hardwire_ttystate *state) |
c906108c SS |
139 | { |
140 | #ifdef HAVE_TERMIOS | |
c5aa993b | 141 | if (tcsetattr (scb->fd, TCSANOW, &state->termios) < 0) |
c906108c SS |
142 | return -1; |
143 | ||
144 | return 0; | |
145 | #endif | |
146 | ||
147 | #ifdef HAVE_TERMIO | |
148 | if (ioctl (scb->fd, TCSETA, &state->termio) < 0) | |
149 | return -1; | |
150 | return 0; | |
151 | #endif | |
152 | ||
153 | #ifdef HAVE_SGTTY | |
154 | if (ioctl (scb->fd, TIOCSETN, &state->sgttyb) < 0) | |
155 | return -1; | |
156 | if (ioctl (scb->fd, TIOCSETC, &state->tc) < 0) | |
157 | return -1; | |
158 | if (ioctl (scb->fd, TIOCSLTC, &state->ltc) < 0) | |
159 | return -1; | |
160 | if (ioctl (scb->fd, TIOCLSET, &state->lmode) < 0) | |
161 | return -1; | |
162 | ||
163 | return 0; | |
164 | #endif | |
165 | } | |
166 | ||
167 | static serial_ttystate | |
819cc324 | 168 | hardwire_get_tty_state (struct serial *scb) |
c906108c SS |
169 | { |
170 | struct hardwire_ttystate *state; | |
171 | ||
c5aa993b | 172 | state = (struct hardwire_ttystate *) xmalloc (sizeof *state); |
c906108c | 173 | |
c5aa993b | 174 | if (get_tty_state (scb, state)) |
c906108c SS |
175 | return NULL; |
176 | ||
c5aa993b | 177 | return (serial_ttystate) state; |
c906108c SS |
178 | } |
179 | ||
180 | static int | |
819cc324 | 181 | hardwire_set_tty_state (struct serial *scb, serial_ttystate ttystate) |
c906108c SS |
182 | { |
183 | struct hardwire_ttystate *state; | |
184 | ||
c5aa993b | 185 | state = (struct hardwire_ttystate *) ttystate; |
c906108c | 186 | |
c5aa993b | 187 | return set_tty_state (scb, state); |
c906108c SS |
188 | } |
189 | ||
190 | static int | |
819cc324 | 191 | hardwire_noflush_set_tty_state (struct serial *scb, |
c2c6d25f JM |
192 | serial_ttystate new_ttystate, |
193 | serial_ttystate old_ttystate) | |
c906108c SS |
194 | { |
195 | struct hardwire_ttystate new_state; | |
196 | #ifdef HAVE_SGTTY | |
197 | struct hardwire_ttystate *state = (struct hardwire_ttystate *) old_ttystate; | |
198 | #endif | |
199 | ||
c5aa993b | 200 | new_state = *(struct hardwire_ttystate *) new_ttystate; |
c906108c SS |
201 | |
202 | /* Don't change in or out of raw mode; we don't want to flush input. | |
203 | termio and termios have no such restriction; for them flushing input | |
204 | is separate from setting the attributes. */ | |
205 | ||
206 | #ifdef HAVE_SGTTY | |
207 | if (state->sgttyb.sg_flags & RAW) | |
208 | new_state.sgttyb.sg_flags |= RAW; | |
209 | else | |
210 | new_state.sgttyb.sg_flags &= ~RAW; | |
211 | ||
212 | /* I'm not sure whether this is necessary; the manpage just mentions | |
213 | RAW not CBREAK. */ | |
214 | if (state->sgttyb.sg_flags & CBREAK) | |
215 | new_state.sgttyb.sg_flags |= CBREAK; | |
216 | else | |
217 | new_state.sgttyb.sg_flags &= ~CBREAK; | |
218 | #endif | |
219 | ||
220 | return set_tty_state (scb, &new_state); | |
221 | } | |
222 | ||
223 | static void | |
819cc324 | 224 | hardwire_print_tty_state (struct serial *scb, |
c2c6d25f | 225 | serial_ttystate ttystate, |
d9fcf2fb | 226 | struct ui_file *stream) |
c906108c SS |
227 | { |
228 | struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate; | |
229 | int i; | |
230 | ||
231 | #ifdef HAVE_TERMIOS | |
c2c6d25f | 232 | fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n", |
2acceee2 JM |
233 | (int) state->termios.c_iflag, |
234 | (int) state->termios.c_oflag); | |
c2c6d25f | 235 | fprintf_filtered (stream, "c_cflag = 0x%x, c_lflag = 0x%x\n", |
2acceee2 JM |
236 | (int) state->termios.c_cflag, |
237 | (int) state->termios.c_lflag); | |
c906108c SS |
238 | #if 0 |
239 | /* This not in POSIX, and is not really documented by those systems | |
240 | which have it (at least not Sun). */ | |
c2c6d25f | 241 | fprintf_filtered (stream, "c_line = 0x%x.\n", state->termios.c_line); |
c906108c | 242 | #endif |
c2c6d25f | 243 | fprintf_filtered (stream, "c_cc: "); |
c906108c | 244 | for (i = 0; i < NCCS; i += 1) |
c2c6d25f JM |
245 | fprintf_filtered (stream, "0x%x ", state->termios.c_cc[i]); |
246 | fprintf_filtered (stream, "\n"); | |
c906108c SS |
247 | #endif |
248 | ||
249 | #ifdef HAVE_TERMIO | |
c2c6d25f JM |
250 | fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n", |
251 | state->termio.c_iflag, state->termio.c_oflag); | |
252 | fprintf_filtered (stream, "c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n", | |
253 | state->termio.c_cflag, state->termio.c_lflag, | |
254 | state->termio.c_line); | |
255 | fprintf_filtered (stream, "c_cc: "); | |
c906108c | 256 | for (i = 0; i < NCC; i += 1) |
c2c6d25f JM |
257 | fprintf_filtered (stream, "0x%x ", state->termio.c_cc[i]); |
258 | fprintf_filtered (stream, "\n"); | |
c906108c SS |
259 | #endif |
260 | ||
261 | #ifdef HAVE_SGTTY | |
c2c6d25f JM |
262 | fprintf_filtered (stream, "sgttyb.sg_flags = 0x%x.\n", |
263 | state->sgttyb.sg_flags); | |
c906108c | 264 | |
c2c6d25f | 265 | fprintf_filtered (stream, "tchars: "); |
c5aa993b | 266 | for (i = 0; i < (int) sizeof (struct tchars); i++) |
c2c6d25f | 267 | fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->tc)[i]); |
64122a8b | 268 | fprintf_filtered (stream, "\n"); |
c906108c | 269 | |
c2c6d25f | 270 | fprintf_filtered (stream, "ltchars: "); |
c5aa993b | 271 | for (i = 0; i < (int) sizeof (struct ltchars); i++) |
c2c6d25f JM |
272 | fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->ltc)[i]); |
273 | fprintf_filtered (stream, "\n"); | |
c906108c | 274 | |
c2c6d25f | 275 | fprintf_filtered (stream, "lmode: 0x%x\n", state->lmode); |
c906108c SS |
276 | #endif |
277 | } | |
278 | ||
279 | /* Wait for the output to drain away, as opposed to flushing (discarding) it */ | |
280 | ||
281 | static int | |
819cc324 | 282 | hardwire_drain_output (struct serial *scb) |
c906108c SS |
283 | { |
284 | #ifdef HAVE_TERMIOS | |
285 | return tcdrain (scb->fd); | |
286 | #endif | |
287 | ||
288 | #ifdef HAVE_TERMIO | |
289 | return ioctl (scb->fd, TCSBRK, 1); | |
290 | #endif | |
291 | ||
292 | #ifdef HAVE_SGTTY | |
293 | /* Get the current state and then restore it using TIOCSETP, | |
294 | which should cause the output to drain and pending input | |
295 | to be discarded. */ | |
296 | { | |
297 | struct hardwire_ttystate state; | |
298 | if (get_tty_state (scb, &state)) | |
299 | { | |
300 | return (-1); | |
301 | } | |
302 | else | |
303 | { | |
304 | return (ioctl (scb->fd, TIOCSETP, &state.sgttyb)); | |
305 | } | |
306 | } | |
c5aa993b | 307 | #endif |
c906108c SS |
308 | } |
309 | ||
310 | static int | |
819cc324 | 311 | hardwire_flush_output (struct serial *scb) |
c906108c SS |
312 | { |
313 | #ifdef HAVE_TERMIOS | |
314 | return tcflush (scb->fd, TCOFLUSH); | |
315 | #endif | |
316 | ||
317 | #ifdef HAVE_TERMIO | |
318 | return ioctl (scb->fd, TCFLSH, 1); | |
319 | #endif | |
320 | ||
321 | #ifdef HAVE_SGTTY | |
322 | /* This flushes both input and output, but we can't do better. */ | |
323 | return ioctl (scb->fd, TIOCFLUSH, 0); | |
c5aa993b | 324 | #endif |
c906108c SS |
325 | } |
326 | ||
327 | static int | |
819cc324 | 328 | hardwire_flush_input (struct serial *scb) |
c906108c | 329 | { |
dd5da072 | 330 | ser_base_flush_input (scb); |
c906108c SS |
331 | |
332 | #ifdef HAVE_TERMIOS | |
333 | return tcflush (scb->fd, TCIFLUSH); | |
334 | #endif | |
335 | ||
336 | #ifdef HAVE_TERMIO | |
337 | return ioctl (scb->fd, TCFLSH, 0); | |
338 | #endif | |
339 | ||
340 | #ifdef HAVE_SGTTY | |
341 | /* This flushes both input and output, but we can't do better. */ | |
342 | return ioctl (scb->fd, TIOCFLUSH, 0); | |
c5aa993b | 343 | #endif |
c906108c SS |
344 | } |
345 | ||
346 | static int | |
819cc324 | 347 | hardwire_send_break (struct serial *scb) |
c906108c SS |
348 | { |
349 | #ifdef HAVE_TERMIOS | |
350 | return tcsendbreak (scb->fd, 0); | |
351 | #endif | |
352 | ||
353 | #ifdef HAVE_TERMIO | |
354 | return ioctl (scb->fd, TCSBRK, 0); | |
355 | #endif | |
356 | ||
357 | #ifdef HAVE_SGTTY | |
358 | { | |
359 | int status; | |
360 | struct timeval timeout; | |
361 | ||
362 | status = ioctl (scb->fd, TIOCSBRK, 0); | |
363 | ||
364 | /* Can't use usleep; it doesn't exist in BSD 4.2. */ | |
365 | /* Note that if this select() is interrupted by a signal it will not wait | |
366 | the full length of time. I think that is OK. */ | |
367 | timeout.tv_sec = 0; | |
368 | timeout.tv_usec = 250000; | |
0ea3f30e | 369 | gdb_select (0, 0, 0, 0, &timeout); |
c906108c SS |
370 | status = ioctl (scb->fd, TIOCCBRK, 0); |
371 | return status; | |
372 | } | |
c5aa993b | 373 | #endif |
c906108c SS |
374 | } |
375 | ||
376 | static void | |
819cc324 | 377 | hardwire_raw (struct serial *scb) |
c906108c SS |
378 | { |
379 | struct hardwire_ttystate state; | |
380 | ||
c5aa993b JM |
381 | if (get_tty_state (scb, &state)) |
382 | fprintf_unfiltered (gdb_stderr, "get_tty_state failed: %s\n", safe_strerror (errno)); | |
c906108c SS |
383 | |
384 | #ifdef HAVE_TERMIOS | |
385 | state.termios.c_iflag = 0; | |
386 | state.termios.c_oflag = 0; | |
387 | state.termios.c_lflag = 0; | |
c5aa993b | 388 | state.termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c SS |
389 | state.termios.c_cflag |= CLOCAL | CS8; |
390 | state.termios.c_cc[VMIN] = 0; | |
391 | state.termios.c_cc[VTIME] = 0; | |
392 | #endif | |
393 | ||
394 | #ifdef HAVE_TERMIO | |
395 | state.termio.c_iflag = 0; | |
396 | state.termio.c_oflag = 0; | |
397 | state.termio.c_lflag = 0; | |
c5aa993b | 398 | state.termio.c_cflag &= ~(CSIZE | PARENB); |
c906108c SS |
399 | state.termio.c_cflag |= CLOCAL | CS8; |
400 | state.termio.c_cc[VMIN] = 0; | |
401 | state.termio.c_cc[VTIME] = 0; | |
402 | #endif | |
403 | ||
404 | #ifdef HAVE_SGTTY | |
405 | state.sgttyb.sg_flags |= RAW | ANYP; | |
406 | state.sgttyb.sg_flags &= ~(CBREAK | ECHO); | |
407 | #endif | |
408 | ||
409 | scb->current_timeout = 0; | |
410 | ||
411 | if (set_tty_state (scb, &state)) | |
c5aa993b | 412 | fprintf_unfiltered (gdb_stderr, "set_tty_state failed: %s\n", safe_strerror (errno)); |
c906108c SS |
413 | } |
414 | ||
415 | /* Wait for input on scb, with timeout seconds. Returns 0 on success, | |
416 | otherwise SERIAL_TIMEOUT or SERIAL_ERROR. | |
417 | ||
418 | For termio{s}, we actually just setup VTIME if necessary, and let the | |
419 | timeout occur in the read() in hardwire_read(). | |
420 | */ | |
421 | ||
2acceee2 | 422 | /* FIXME: cagney/1999-09-16: Don't replace this with the equivalent |
b4505029 | 423 | ser_base*() until the old TERMIOS/SGTTY/... timer code has been |
2acceee2 JM |
424 | flushed. . */ |
425 | ||
426 | /* NOTE: cagney/1999-09-30: Much of the code below is dead. The only | |
427 | possible values of the TIMEOUT parameter are ONE and ZERO. | |
428 | Consequently all the code that tries to handle the possability of | |
429 | an overflowed timer is unnecessary. */ | |
c2c6d25f | 430 | |
c906108c | 431 | static int |
819cc324 | 432 | wait_for (struct serial *scb, int timeout) |
c906108c | 433 | { |
c906108c | 434 | #ifdef HAVE_SGTTY |
ab5ba170 AC |
435 | while (1) |
436 | { | |
437 | struct timeval tv; | |
438 | fd_set readfds; | |
439 | int numfds; | |
c906108c | 440 | |
ab5ba170 AC |
441 | /* NOTE: Some OS's can scramble the READFDS when the select() |
442 | call fails (ex the kernel with Red Hat 5.2). Initialize all | |
443 | arguments before each call. */ | |
c906108c | 444 | |
ab5ba170 AC |
445 | tv.tv_sec = timeout; |
446 | tv.tv_usec = 0; | |
c906108c | 447 | |
ab5ba170 AC |
448 | FD_ZERO (&readfds); |
449 | FD_SET (scb->fd, &readfds); | |
c906108c | 450 | |
ab5ba170 | 451 | if (timeout >= 0) |
0ea3f30e | 452 | numfds = gdb_select (scb->fd + 1, &readfds, 0, 0, &tv); |
ab5ba170 | 453 | else |
0ea3f30e | 454 | numfds = gdb_select (scb->fd + 1, &readfds, 0, 0, 0); |
c906108c | 455 | |
ab5ba170 AC |
456 | if (numfds <= 0) |
457 | if (numfds == 0) | |
458 | return SERIAL_TIMEOUT; | |
459 | else if (errno == EINTR) | |
460 | continue; | |
c906108c | 461 | else |
ab5ba170 | 462 | return SERIAL_ERROR; /* Got an error from select or poll */ |
c906108c | 463 | |
ab5ba170 AC |
464 | return 0; |
465 | } | |
c5aa993b | 466 | #endif /* HAVE_SGTTY */ |
c906108c SS |
467 | |
468 | #if defined HAVE_TERMIO || defined HAVE_TERMIOS | |
469 | if (timeout == scb->current_timeout) | |
470 | return 0; | |
471 | ||
472 | scb->current_timeout = timeout; | |
473 | ||
474 | { | |
475 | struct hardwire_ttystate state; | |
476 | ||
c5aa993b JM |
477 | if (get_tty_state (scb, &state)) |
478 | fprintf_unfiltered (gdb_stderr, "get_tty_state failed: %s\n", safe_strerror (errno)); | |
c906108c SS |
479 | |
480 | #ifdef HAVE_TERMIOS | |
481 | if (timeout < 0) | |
482 | { | |
483 | /* No timeout. */ | |
484 | state.termios.c_cc[VTIME] = 0; | |
485 | state.termios.c_cc[VMIN] = 1; | |
486 | } | |
487 | else | |
488 | { | |
489 | state.termios.c_cc[VMIN] = 0; | |
490 | state.termios.c_cc[VTIME] = timeout * 10; | |
491 | if (state.termios.c_cc[VTIME] != timeout * 10) | |
492 | { | |
493 | ||
494 | /* If c_cc is an 8-bit signed character, we can't go | |
495 | bigger than this. If it is always unsigned, we could use | |
496 | 25. */ | |
497 | ||
498 | scb->current_timeout = 12; | |
499 | state.termios.c_cc[VTIME] = scb->current_timeout * 10; | |
500 | scb->timeout_remaining = timeout - scb->current_timeout; | |
501 | } | |
502 | } | |
503 | #endif | |
504 | ||
505 | #ifdef HAVE_TERMIO | |
506 | if (timeout < 0) | |
507 | { | |
508 | /* No timeout. */ | |
509 | state.termio.c_cc[VTIME] = 0; | |
510 | state.termio.c_cc[VMIN] = 1; | |
511 | } | |
512 | else | |
513 | { | |
514 | state.termio.c_cc[VMIN] = 0; | |
515 | state.termio.c_cc[VTIME] = timeout * 10; | |
516 | if (state.termio.c_cc[VTIME] != timeout * 10) | |
517 | { | |
518 | /* If c_cc is an 8-bit signed character, we can't go | |
519 | bigger than this. If it is always unsigned, we could use | |
520 | 25. */ | |
521 | ||
522 | scb->current_timeout = 12; | |
523 | state.termio.c_cc[VTIME] = scb->current_timeout * 10; | |
524 | scb->timeout_remaining = timeout - scb->current_timeout; | |
525 | } | |
526 | } | |
527 | #endif | |
528 | ||
529 | if (set_tty_state (scb, &state)) | |
c5aa993b | 530 | fprintf_unfiltered (gdb_stderr, "set_tty_state failed: %s\n", safe_strerror (errno)); |
c906108c SS |
531 | |
532 | return 0; | |
533 | } | |
c5aa993b | 534 | #endif /* HAVE_TERMIO || HAVE_TERMIOS */ |
c906108c SS |
535 | } |
536 | ||
537 | /* Read a character with user-specified timeout. TIMEOUT is number of seconds | |
538 | to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns | |
539 | char if successful. Returns SERIAL_TIMEOUT if timeout expired, EOF if line | |
540 | dropped dead, or SERIAL_ERROR for any other error (see errno in that case). */ | |
c2c6d25f JM |
541 | |
542 | /* FIXME: cagney/1999-09-16: Don't replace this with the equivalent | |
b4505029 | 543 | ser_base*() until the old TERMIOS/SGTTY/... timer code has been |
c2c6d25f JM |
544 | flushed. */ |
545 | ||
546 | /* NOTE: cagney/1999-09-16: This function is not identical to | |
b4505029 | 547 | ser_base_readchar() as part of replacing it with ser_base*() |
c2c6d25f | 548 | merging will be required - this code handles the case where read() |
b4505029 | 549 | times out due to no data while ser_base_readchar() doesn't expect |
c2c6d25f JM |
550 | that. */ |
551 | ||
c906108c | 552 | static int |
819cc324 | 553 | do_hardwire_readchar (struct serial *scb, int timeout) |
c906108c | 554 | { |
7a292a7a SS |
555 | int status, delta; |
556 | int detach = 0; | |
c906108c | 557 | |
c906108c SS |
558 | if (timeout > 0) |
559 | timeout++; | |
c906108c | 560 | |
2c1ab592 MS |
561 | /* We have to be able to keep the GUI alive here, so we break the |
562 | original timeout into steps of 1 second, running the "keep the | |
563 | GUI alive" hook each time through the loop. | |
564 | ||
565 | Also, timeout = 0 means to poll, so we just set the delta to 0, | |
566 | so we will only go through the loop once. */ | |
c5aa993b | 567 | |
7a292a7a | 568 | delta = (timeout == 0 ? 0 : 1); |
c906108c SS |
569 | while (1) |
570 | { | |
c906108c | 571 | |
7a292a7a SS |
572 | /* N.B. The UI may destroy our world (for instance by calling |
573 | remote_stop,) in which case we want to get out of here as | |
574 | quickly as possible. It is not safe to touch scb, since | |
98bbd631 AC |
575 | someone else might have freed it. The |
576 | deprecated_ui_loop_hook signals that we should exit by | |
577 | returning 1. */ | |
7a292a7a | 578 | |
98bbd631 AC |
579 | if (deprecated_ui_loop_hook) |
580 | detach = deprecated_ui_loop_hook (0); | |
7a292a7a SS |
581 | |
582 | if (detach) | |
583 | return SERIAL_TIMEOUT; | |
584 | ||
585 | scb->timeout_remaining = (timeout < 0 ? timeout : timeout - delta); | |
586 | status = wait_for (scb, delta); | |
587 | ||
c906108c SS |
588 | if (status < 0) |
589 | return status; | |
590 | ||
2acceee2 | 591 | status = read (scb->fd, scb->buf, BUFSIZ); |
c906108c | 592 | |
2acceee2 | 593 | if (status <= 0) |
c906108c | 594 | { |
2acceee2 | 595 | if (status == 0) |
c906108c SS |
596 | { |
597 | /* Zero characters means timeout (it could also be EOF, but | |
c5aa993b | 598 | we don't (yet at least) distinguish). */ |
c906108c SS |
599 | if (scb->timeout_remaining > 0) |
600 | { | |
601 | timeout = scb->timeout_remaining; | |
602 | continue; | |
603 | } | |
c5aa993b JM |
604 | else if (scb->timeout_remaining < 0) |
605 | continue; | |
c906108c SS |
606 | else |
607 | return SERIAL_TIMEOUT; | |
608 | } | |
609 | else if (errno == EINTR) | |
610 | continue; | |
611 | else | |
612 | return SERIAL_ERROR; /* Got an error from read */ | |
613 | } | |
614 | ||
2acceee2 | 615 | scb->bufcnt = status; |
c906108c SS |
616 | scb->bufcnt--; |
617 | scb->bufp = scb->buf; | |
618 | return *scb->bufp++; | |
619 | } | |
620 | } | |
621 | ||
2acceee2 | 622 | static int |
819cc324 | 623 | hardwire_readchar (struct serial *scb, int timeout) |
2acceee2 JM |
624 | { |
625 | return generic_readchar (scb, timeout, do_hardwire_readchar); | |
626 | } | |
627 | ||
628 | ||
c906108c SS |
629 | #ifndef B19200 |
630 | #define B19200 EXTA | |
631 | #endif | |
632 | ||
633 | #ifndef B38400 | |
634 | #define B38400 EXTB | |
635 | #endif | |
636 | ||
637 | /* Translate baud rates from integers to damn B_codes. Unix should | |
638 | have outgrown this crap years ago, but even POSIX wouldn't buck it. */ | |
639 | ||
640 | static struct | |
641 | { | |
642 | int rate; | |
643 | int code; | |
644 | } | |
645 | baudtab[] = | |
646 | { | |
c5aa993b JM |
647 | { |
648 | 50, B50 | |
649 | } | |
650 | , | |
651 | { | |
652 | 75, B75 | |
653 | } | |
654 | , | |
655 | { | |
656 | 110, B110 | |
657 | } | |
658 | , | |
659 | { | |
660 | 134, B134 | |
661 | } | |
662 | , | |
663 | { | |
664 | 150, B150 | |
665 | } | |
666 | , | |
667 | { | |
668 | 200, B200 | |
669 | } | |
670 | , | |
671 | { | |
672 | 300, B300 | |
673 | } | |
674 | , | |
675 | { | |
676 | 600, B600 | |
677 | } | |
678 | , | |
679 | { | |
680 | 1200, B1200 | |
681 | } | |
682 | , | |
683 | { | |
684 | 1800, B1800 | |
685 | } | |
686 | , | |
687 | { | |
688 | 2400, B2400 | |
689 | } | |
690 | , | |
691 | { | |
692 | 4800, B4800 | |
693 | } | |
694 | , | |
695 | { | |
696 | 9600, B9600 | |
697 | } | |
698 | , | |
699 | { | |
700 | 19200, B19200 | |
701 | } | |
702 | , | |
703 | { | |
704 | 38400, B38400 | |
705 | } | |
706 | , | |
c906108c | 707 | #ifdef B57600 |
c5aa993b JM |
708 | { |
709 | 57600, B57600 | |
710 | } | |
711 | , | |
c906108c SS |
712 | #endif |
713 | #ifdef B115200 | |
c5aa993b JM |
714 | { |
715 | 115200, B115200 | |
716 | } | |
717 | , | |
c906108c SS |
718 | #endif |
719 | #ifdef B230400 | |
c5aa993b JM |
720 | { |
721 | 230400, B230400 | |
722 | } | |
723 | , | |
c906108c SS |
724 | #endif |
725 | #ifdef B460800 | |
c5aa993b JM |
726 | { |
727 | 460800, B460800 | |
728 | } | |
729 | , | |
c906108c | 730 | #endif |
c5aa993b JM |
731 | { |
732 | -1, -1 | |
733 | } | |
734 | , | |
c906108c SS |
735 | }; |
736 | ||
c5aa993b | 737 | static int |
c2c6d25f | 738 | rate_to_code (int rate) |
c906108c SS |
739 | { |
740 | int i; | |
741 | ||
742 | for (i = 0; baudtab[i].rate != -1; i++) | |
08b4f080 FN |
743 | { |
744 | /* test for perfect macth. */ | |
745 | if (rate == baudtab[i].rate) | |
746 | return baudtab[i].code; | |
747 | else | |
748 | { | |
749 | /* check if it is in between valid values. */ | |
750 | if (rate < baudtab[i].rate) | |
751 | { | |
752 | if (i) | |
753 | { | |
8a3fe4f8 | 754 | warning (_("Invalid baud rate %d. Closest values are %d and %d."), |
08b4f080 FN |
755 | rate, baudtab[i - 1].rate, baudtab[i].rate); |
756 | } | |
757 | else | |
758 | { | |
8a3fe4f8 | 759 | warning (_("Invalid baud rate %d. Minimum value is %d."), |
08b4f080 FN |
760 | rate, baudtab[0].rate); |
761 | } | |
762 | return -1; | |
763 | } | |
764 | } | |
765 | } | |
766 | ||
767 | /* The requested speed was too large. */ | |
8a3fe4f8 | 768 | warning (_("Invalid baud rate %d. Maximum value is %d."), |
08b4f080 | 769 | rate, baudtab[i - 1].rate); |
c906108c SS |
770 | return -1; |
771 | } | |
772 | ||
773 | static int | |
819cc324 | 774 | hardwire_setbaudrate (struct serial *scb, int rate) |
c906108c SS |
775 | { |
776 | struct hardwire_ttystate state; | |
08b4f080 FN |
777 | int baud_code = rate_to_code (rate); |
778 | ||
779 | if (baud_code < 0) | |
780 | { | |
781 | /* The baud rate was not valid. | |
782 | A warning has already been issued. */ | |
783 | errno = EINVAL; | |
784 | return -1; | |
785 | } | |
c906108c | 786 | |
c5aa993b | 787 | if (get_tty_state (scb, &state)) |
c906108c SS |
788 | return -1; |
789 | ||
790 | #ifdef HAVE_TERMIOS | |
08b4f080 FN |
791 | cfsetospeed (&state.termios, baud_code); |
792 | cfsetispeed (&state.termios, baud_code); | |
c906108c SS |
793 | #endif |
794 | ||
795 | #ifdef HAVE_TERMIO | |
796 | #ifndef CIBAUD | |
797 | #define CIBAUD CBAUD | |
798 | #endif | |
799 | ||
800 | state.termio.c_cflag &= ~(CBAUD | CIBAUD); | |
08b4f080 | 801 | state.termio.c_cflag |= baud_code; |
c906108c SS |
802 | #endif |
803 | ||
804 | #ifdef HAVE_SGTTY | |
08b4f080 FN |
805 | state.sgttyb.sg_ispeed = baud_code; |
806 | state.sgttyb.sg_ospeed = baud_code; | |
c906108c SS |
807 | #endif |
808 | ||
809 | return set_tty_state (scb, &state); | |
810 | } | |
811 | ||
812 | static int | |
819cc324 | 813 | hardwire_setstopbits (struct serial *scb, int num) |
c906108c SS |
814 | { |
815 | struct hardwire_ttystate state; | |
816 | int newbit; | |
817 | ||
c5aa993b | 818 | if (get_tty_state (scb, &state)) |
c906108c SS |
819 | return -1; |
820 | ||
821 | switch (num) | |
822 | { | |
823 | case SERIAL_1_STOPBITS: | |
824 | newbit = 0; | |
825 | break; | |
826 | case SERIAL_1_AND_A_HALF_STOPBITS: | |
827 | case SERIAL_2_STOPBITS: | |
828 | newbit = 1; | |
829 | break; | |
830 | default: | |
831 | return 1; | |
832 | } | |
833 | ||
834 | #ifdef HAVE_TERMIOS | |
835 | if (!newbit) | |
836 | state.termios.c_cflag &= ~CSTOPB; | |
837 | else | |
c5aa993b | 838 | state.termios.c_cflag |= CSTOPB; /* two bits */ |
c906108c SS |
839 | #endif |
840 | ||
841 | #ifdef HAVE_TERMIO | |
842 | if (!newbit) | |
843 | state.termio.c_cflag &= ~CSTOPB; | |
844 | else | |
c5aa993b | 845 | state.termio.c_cflag |= CSTOPB; /* two bits */ |
c906108c SS |
846 | #endif |
847 | ||
848 | #ifdef HAVE_SGTTY | |
849 | return 0; /* sgtty doesn't support this */ | |
850 | #endif | |
851 | ||
852 | return set_tty_state (scb, &state); | |
853 | } | |
854 | ||
c906108c | 855 | static void |
819cc324 | 856 | hardwire_close (struct serial *scb) |
c906108c SS |
857 | { |
858 | if (scb->fd < 0) | |
859 | return; | |
860 | ||
c5aa993b | 861 | close (scb->fd); |
c906108c SS |
862 | scb->fd = -1; |
863 | } | |
c2c6d25f | 864 | \f |
2acceee2 | 865 | \f |
c906108c | 866 | void |
c2c6d25f | 867 | _initialize_ser_hardwire (void) |
c906108c | 868 | { |
c2c6d25f | 869 | struct serial_ops *ops = XMALLOC (struct serial_ops); |
2fdbdd39 | 870 | memset (ops, 0, sizeof (struct serial_ops)); |
c2c6d25f JM |
871 | ops->name = "hardwire"; |
872 | ops->next = 0; | |
873 | ops->open = hardwire_open; | |
874 | ops->close = hardwire_close; | |
b4505029 | 875 | /* FIXME: Don't replace this with the equivalent ser_base*() until |
c2c6d25f JM |
876 | the old TERMIOS/SGTTY/... timer code has been flushed. cagney |
877 | 1999-09-16. */ | |
878 | ops->readchar = hardwire_readchar; | |
dd5da072 | 879 | ops->write = ser_base_write; |
c2c6d25f JM |
880 | ops->flush_output = hardwire_flush_output; |
881 | ops->flush_input = hardwire_flush_input; | |
882 | ops->send_break = hardwire_send_break; | |
883 | ops->go_raw = hardwire_raw; | |
884 | ops->get_tty_state = hardwire_get_tty_state; | |
885 | ops->set_tty_state = hardwire_set_tty_state; | |
886 | ops->print_tty_state = hardwire_print_tty_state; | |
887 | ops->noflush_set_tty_state = hardwire_noflush_set_tty_state; | |
888 | ops->setbaudrate = hardwire_setbaudrate; | |
889 | ops->setstopbits = hardwire_setstopbits; | |
890 | ops->drain_output = hardwire_drain_output; | |
dd5da072 | 891 | ops->async = ser_base_async; |
b4505029 MM |
892 | ops->read_prim = ser_unix_read_prim; |
893 | ops->write_prim = ser_unix_write_prim; | |
c2c6d25f | 894 | serial_add_interface (ops); |
c906108c | 895 | } |
b4505029 MM |
896 | |
897 | int | |
898 | ser_unix_read_prim (struct serial *scb, size_t count) | |
899 | { | |
900 | int status; | |
901 | ||
902 | while (1) | |
903 | { | |
904 | status = read (scb->fd, scb->buf, count); | |
905 | if (status != -1 || errno != EINTR) | |
906 | break; | |
907 | } | |
908 | return status; | |
909 | } | |
910 | ||
911 | int | |
912 | ser_unix_write_prim (struct serial *scb, const void *buf, size_t len) | |
913 | { | |
914 | /* ??? Historically, GDB has not retried calls to "write" that | |
915 | result in EINTR. */ | |
916 | return write (scb->fd, buf, len); | |
917 | } |