1 /* Generic serial interface routines
3 Copyright (C) 1992-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
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 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "gdb_string.h"
25 #include "cli/cli-utils.h"
27 extern void _initialize_serial (void);
29 /* Is serial being debugged? */
31 static unsigned int global_serial_debug_p;
33 /* Linked list of serial I/O handlers. */
35 static struct serial_ops *serial_ops_list = NULL;
37 /* Pointer to list of scb's. */
39 static struct serial *scb_base;
41 /* Non-NULL gives filename which contains a recording of the remote session,
42 suitable for playback by gdbserver. */
44 static char *serial_logfile = NULL;
45 static struct ui_file *serial_logfp = NULL;
47 static struct serial_ops *serial_interface_lookup (const char *);
48 static void serial_logchar (struct ui_file *stream,
49 int ch_type, int ch, int timeout);
50 static const char logbase_hex[] = "hex";
51 static const char logbase_octal[] = "octal";
52 static const char logbase_ascii[] = "ascii";
53 static const char *const logbase_enums[] =
54 {logbase_hex, logbase_octal, logbase_ascii, NULL};
55 static const char *serial_logbase = logbase_ascii;
58 static int serial_current_type = 0;
60 /* Log char CH of type CHTYPE, with TIMEOUT. */
62 /* Define bogus char to represent a BREAK. Should be careful to choose a value
63 that can't be confused with a normal char, or an error code. */
64 #define SERIAL_BREAK 1235
67 serial_logchar (struct ui_file *stream, int ch_type, int ch, int timeout)
69 if (ch_type != serial_current_type)
71 fprintf_unfiltered (stream, "\n%c ", ch_type);
72 serial_current_type = ch_type;
75 if (serial_logbase != logbase_ascii)
76 fputc_unfiltered (' ', stream);
81 fprintf_unfiltered (stream, "<Timeout: %d seconds>", timeout);
84 fprintf_unfiltered (stream, "<Error: %s>", safe_strerror (errno));
87 fputs_unfiltered ("<Eof>", stream);
90 fputs_unfiltered ("<Break>", stream);
93 if (serial_logbase == logbase_hex)
94 fprintf_unfiltered (stream, "%02x", ch & 0xff);
95 else if (serial_logbase == logbase_octal)
96 fprintf_unfiltered (stream, "%03o", ch & 0xff);
101 fputs_unfiltered ("\\\\", stream);
104 fputs_unfiltered ("\\b", stream);
107 fputs_unfiltered ("\\f", stream);
110 fputs_unfiltered ("\\n", stream);
113 fputs_unfiltered ("\\r", stream);
116 fputs_unfiltered ("\\t", stream);
119 fputs_unfiltered ("\\v", stream);
122 fprintf_unfiltered (stream,
123 isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF);
130 serial_log_command (const char *cmd)
135 serial_current_type = 'c';
137 fputs_unfiltered ("\nc ", serial_logfp);
138 fputs_unfiltered (cmd, serial_logfp);
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. */
142 gdb_flush (serial_logfp);
146 static struct serial_ops *
147 serial_interface_lookup (const char *name)
149 struct serial_ops *ops;
151 for (ops = serial_ops_list; ops; ops = ops->next)
152 if (strcmp (name, ops->name) == 0)
159 serial_add_interface (struct serial_ops *optable)
161 optable->next = serial_ops_list;
162 serial_ops_list = optable;
165 /* Return the open serial device for FD, if found, or NULL if FD is
166 not already opened. */
169 serial_for_fd (int fd)
173 for (scb = scb_base; scb; scb = scb->next)
180 /* Open up a device or a network socket, depending upon the syntax of NAME. */
183 serial_open (const char *name)
186 struct serial_ops *ops;
187 const char *open_name = name;
189 if (strcmp (name, "pc") == 0)
190 ops = serial_interface_lookup ("pc");
191 else if (strncmp (name, "lpt", 3) == 0)
192 ops = serial_interface_lookup ("parallel");
193 else if (strncmp (name, "|", 1) == 0)
195 ops = serial_interface_lookup ("pipe");
196 /* Discard ``|'' and any space before the command itself. */
198 open_name = skip_spaces_const (open_name);
200 /* Check for a colon, suggesting an IP address/port pair.
201 Do this *after* checking for all the interesting prefixes. We
202 don't want to constrain the syntax of what can follow them. */
203 else if (strchr (name, ':'))
204 ops = serial_interface_lookup ("tcp");
206 ops = serial_interface_lookup ("hardwire");
211 scb = XMALLOC (struct serial);
216 scb->bufp = scb->buf;
220 /* `...->open (...)' would get expanded by the open(2) syscall macro. */
221 if ((*scb->ops->open) (scb, open_name))
227 scb->name = xstrdup (name);
228 scb->next = scb_base;
230 scb->async_state = 0;
231 scb->async_handler = NULL;
232 scb->async_context = NULL;
235 if (serial_logfile != NULL)
237 serial_logfp = gdb_fopen (serial_logfile, "w");
238 if (serial_logfp == NULL)
239 perror_with_name (serial_logfile);
245 /* Open a new serial stream using a file handle, using serial
246 interface ops OPS. */
248 static struct serial *
249 serial_fdopen_ops (const int fd, struct serial_ops *ops)
255 ops = serial_interface_lookup ("terminal");
257 ops = serial_interface_lookup ("hardwire");
263 scb = XCALLOC (1, struct serial);
268 scb->bufp = scb->buf;
273 scb->next = scb_base;
275 scb->async_state = 0;
276 scb->async_handler = NULL;
277 scb->async_context = NULL;
280 if ((ops->fdopen) != NULL)
281 (*ops->fdopen) (scb, fd);
289 serial_fdopen (const int fd)
291 return serial_fdopen_ops (fd, NULL);
295 do_serial_close (struct serial *scb, int really_close)
297 struct serial *tmp_scb;
301 fputs_unfiltered ("\nEnd of log\n", serial_logfp);
302 serial_current_type = 0;
304 /* XXX - What if serial_logfp == gdb_stdout or gdb_stderr? */
305 ui_file_delete (serial_logfp);
309 /* ensure that the FD has been taken out of async mode. */
310 if (scb->async_handler != NULL)
311 serial_async (scb, NULL, NULL);
314 scb->ops->close (scb);
319 /* For serial_is_open. */
323 scb_base = scb_base->next;
325 for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
327 if (tmp_scb->next != scb)
330 tmp_scb->next = tmp_scb->next->next;
338 serial_close (struct serial *scb)
340 do_serial_close (scb, 1);
344 serial_un_fdopen (struct serial *scb)
346 do_serial_close (scb, 0);
350 serial_is_open (struct serial *scb)
352 return scb->bufp != NULL;
356 serial_ref (struct serial *scb)
362 serial_unref (struct serial *scb)
365 if (scb->refcnt == 0)
370 serial_readchar (struct serial *scb, int timeout)
374 /* FIXME: cagney/1999-10-11: Don't enable this check until the ASYNC
376 if (0 && serial_is_async_p (scb) && timeout < 0)
377 internal_error (__FILE__, __LINE__,
378 _("serial_readchar: blocking read in async mode"));
380 ch = scb->ops->readchar (scb, timeout);
381 if (serial_logfp != NULL)
383 serial_logchar (serial_logfp, 'r', ch, timeout);
385 /* Make sure that the log file is as up-to-date as possible,
386 in case we are getting ready to dump core or something. */
387 gdb_flush (serial_logfp);
389 if (serial_debug_p (scb))
391 fprintf_unfiltered (gdb_stdlog, "[");
392 serial_logchar (gdb_stdlog, 'r', ch, timeout);
393 fprintf_unfiltered (gdb_stdlog, "]");
394 gdb_flush (gdb_stdlog);
401 serial_write (struct serial *scb, const void *buf, size_t count)
403 if (serial_logfp != NULL)
405 const char *str = buf;
408 for (c = 0; c < count; c++)
409 serial_logchar (serial_logfp, 'w', str[c] & 0xff, 0);
411 /* Make sure that the log file is as up-to-date as possible,
412 in case we are getting ready to dump core or something. */
413 gdb_flush (serial_logfp);
415 if (serial_debug_p (scb))
417 const char *str = buf;
420 for (c = 0; c < count; c++)
422 fprintf_unfiltered (gdb_stdlog, "[");
423 serial_logchar (gdb_stdlog, 'w', str[count] & 0xff, 0);
424 fprintf_unfiltered (gdb_stdlog, "]");
426 gdb_flush (gdb_stdlog);
429 return (scb->ops->write (scb, buf, count));
433 serial_printf (struct serial *desc, const char *format,...)
437 va_start (args, format);
439 buf = xstrvprintf (format, args);
440 serial_write (desc, buf, strlen (buf));
447 serial_drain_output (struct serial *scb)
449 return scb->ops->drain_output (scb);
453 serial_flush_output (struct serial *scb)
455 return scb->ops->flush_output (scb);
459 serial_flush_input (struct serial *scb)
461 return scb->ops->flush_input (scb);
465 serial_send_break (struct serial *scb)
467 if (serial_logfp != NULL)
468 serial_logchar (serial_logfp, 'w', SERIAL_BREAK, 0);
470 return (scb->ops->send_break (scb));
474 serial_raw (struct serial *scb)
476 scb->ops->go_raw (scb);
480 serial_get_tty_state (struct serial *scb)
482 return scb->ops->get_tty_state (scb);
486 serial_copy_tty_state (struct serial *scb, serial_ttystate ttystate)
488 return scb->ops->copy_tty_state (scb, ttystate);
492 serial_set_tty_state (struct serial *scb, serial_ttystate ttystate)
494 return scb->ops->set_tty_state (scb, ttystate);
498 serial_print_tty_state (struct serial *scb,
499 serial_ttystate ttystate,
500 struct ui_file *stream)
502 scb->ops->print_tty_state (scb, ttystate, stream);
506 serial_noflush_set_tty_state (struct serial *scb,
507 serial_ttystate new_ttystate,
508 serial_ttystate old_ttystate)
510 return scb->ops->noflush_set_tty_state (scb, new_ttystate, old_ttystate);
514 serial_setbaudrate (struct serial *scb, int rate)
516 return scb->ops->setbaudrate (scb, rate);
520 serial_setstopbits (struct serial *scb, int num)
522 return scb->ops->setstopbits (scb, num);
526 serial_can_async_p (struct serial *scb)
528 return (scb->ops->async != NULL);
532 serial_is_async_p (struct serial *scb)
534 return (scb->ops->async != NULL) && (scb->async_handler != NULL);
538 serial_async (struct serial *scb,
539 serial_event_ftype *handler,
542 int changed = ((scb->async_handler == NULL) != (handler == NULL));
544 scb->async_handler = handler;
545 scb->async_context = context;
546 /* Only change mode if there is a need. */
548 scb->ops->async (scb, handler != NULL);
552 serial_debug (struct serial *scb, int debug_p)
554 scb->debug_p = debug_p;
558 serial_debug_p (struct serial *scb)
560 return scb->debug_p || global_serial_debug_p;
565 serial_wait_handle (struct serial *scb, HANDLE *read, HANDLE *except)
567 if (scb->ops->wait_handle)
568 scb->ops->wait_handle (scb, read, except);
571 *read = (HANDLE) _get_osfhandle (scb->fd);
577 serial_done_wait_handle (struct serial *scb)
579 if (scb->ops->done_wait_handle)
580 scb->ops->done_wait_handle (scb);
585 serial_pipe (struct serial *scbs[2])
587 struct serial_ops *ops;
590 ops = serial_interface_lookup ("pipe");
597 if (gdb_pipe (fildes) == -1)
600 scbs[0] = serial_fdopen_ops (fildes[0], ops);
601 scbs[1] = serial_fdopen_ops (fildes[1], ops);
605 /* Serial set/show framework. */
607 static struct cmd_list_element *serial_set_cmdlist;
608 static struct cmd_list_element *serial_show_cmdlist;
611 serial_set_cmd (char *args, int from_tty)
613 printf_unfiltered ("\"set serial\" must be followed "
614 "by the name of a command.\n");
615 help_list (serial_set_cmdlist, "set serial ", -1, gdb_stdout);
619 serial_show_cmd (char *args, int from_tty)
621 cmd_show_list (serial_show_cmdlist, from_tty, "");
626 _initialize_serial (void)
629 add_com ("connect", class_obscure, connect_command, _("\
630 Connect the terminal directly up to the command monitor.\n\
631 Use <CR>~. or <CR>~^D to break out."));
634 add_prefix_cmd ("serial", class_maintenance, serial_set_cmd, _("\
635 Set default serial/parallel port configuration."),
636 &serial_set_cmdlist, "set serial ",
640 add_prefix_cmd ("serial", class_maintenance, serial_show_cmd, _("\
641 Show default serial/parallel port configuration."),
642 &serial_show_cmdlist, "show serial ",
646 add_setshow_filename_cmd ("remotelogfile", no_class, &serial_logfile, _("\
647 Set filename for remote session recording."), _("\
648 Show filename for remote session recording."), _("\
649 This file is used to record the remote session for future playback\n\
652 NULL, /* FIXME: i18n: */
653 &setlist, &showlist);
655 add_setshow_enum_cmd ("remotelogbase", no_class, logbase_enums,
656 &serial_logbase, _("\
657 Set numerical base for remote session logging"), _("\
658 Show numerical base for remote session logging"), NULL,
660 NULL, /* FIXME: i18n: */
661 &setlist, &showlist);
663 add_setshow_zuinteger_cmd ("serial", class_maintenance,
664 &global_serial_debug_p, _("\
665 Set serial debugging."), _("\
666 Show serial debugging."), _("\
667 When non-zero, serial port debugging is enabled."),
669 NULL, /* FIXME: i18n: */
670 &setdebuglist, &showdebuglist);