1 /* Generic serial interface routines
3 Copyright (C) 1992-2002, 2004-2012 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"
26 extern void _initialize_serial (void);
28 /* Is serial being debugged? */
30 static int global_serial_debug_p;
32 /* Linked list of serial I/O handlers. */
34 static struct serial_ops *serial_ops_list = NULL;
36 /* Pointer to list of scb's. */
38 static struct serial *scb_base;
40 /* Non-NULL gives filename which contains a recording of the remote session,
41 suitable for playback by gdbserver. */
43 static char *serial_logfile = NULL;
44 static struct ui_file *serial_logfp = NULL;
46 static struct serial_ops *serial_interface_lookup (const char *);
47 static void serial_logchar (struct ui_file *stream,
48 int ch_type, int ch, int timeout);
49 static const char logbase_hex[] = "hex";
50 static const char logbase_octal[] = "octal";
51 static const char logbase_ascii[] = "ascii";
52 static const char *const logbase_enums[] =
53 {logbase_hex, logbase_octal, logbase_ascii, NULL};
54 static const char *serial_logbase = logbase_ascii;
57 static int serial_current_type = 0;
59 /* Log char CH of type CHTYPE, with TIMEOUT. */
61 /* Define bogus char to represent a BREAK. Should be careful to choose a value
62 that can't be confused with a normal char, or an error code. */
63 #define SERIAL_BREAK 1235
66 serial_logchar (struct ui_file *stream, int ch_type, int ch, int timeout)
68 if (ch_type != serial_current_type)
70 fprintf_unfiltered (stream, "\n%c ", ch_type);
71 serial_current_type = ch_type;
74 if (serial_logbase != logbase_ascii)
75 fputc_unfiltered (' ', stream);
80 fprintf_unfiltered (stream, "<Timeout: %d seconds>", timeout);
83 fprintf_unfiltered (stream, "<Error: %s>", safe_strerror (errno));
86 fputs_unfiltered ("<Eof>", stream);
89 fputs_unfiltered ("<Break>", stream);
92 if (serial_logbase == logbase_hex)
93 fprintf_unfiltered (stream, "%02x", ch & 0xff);
94 else if (serial_logbase == logbase_octal)
95 fprintf_unfiltered (stream, "%03o", ch & 0xff);
100 fputs_unfiltered ("\\\\", stream);
103 fputs_unfiltered ("\\b", stream);
106 fputs_unfiltered ("\\f", stream);
109 fputs_unfiltered ("\\n", stream);
112 fputs_unfiltered ("\\r", stream);
115 fputs_unfiltered ("\\t", stream);
118 fputs_unfiltered ("\\v", stream);
121 fprintf_unfiltered (stream,
122 isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF);
129 serial_log_command (const char *cmd)
134 serial_current_type = 'c';
136 fputs_unfiltered ("\nc ", serial_logfp);
137 fputs_unfiltered (cmd, serial_logfp);
139 /* Make sure that the log file is as up-to-date as possible,
140 in case we are getting ready to dump core or something. */
141 gdb_flush (serial_logfp);
145 static struct serial_ops *
146 serial_interface_lookup (const char *name)
148 struct serial_ops *ops;
150 for (ops = serial_ops_list; ops; ops = ops->next)
151 if (strcmp (name, ops->name) == 0)
158 serial_add_interface (struct serial_ops *optable)
160 optable->next = serial_ops_list;
161 serial_ops_list = optable;
164 /* Return the open serial device for FD, if found, or NULL if FD is
165 not already opened. */
168 serial_for_fd (int fd)
172 for (scb = scb_base; scb; scb = scb->next)
179 /* Open up a device or a network socket, depending upon the syntax of NAME. */
182 serial_open (const char *name)
185 struct serial_ops *ops;
186 const char *open_name = name;
188 if (strcmp (name, "pc") == 0)
189 ops = serial_interface_lookup ("pc");
190 else if (strncmp (name, "lpt", 3) == 0)
191 ops = serial_interface_lookup ("parallel");
192 else if (strncmp (name, "|", 1) == 0)
194 ops = serial_interface_lookup ("pipe");
195 /* Discard ``|'' and any space before the command itself. */
197 while (isspace (*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 char *str, int len)
403 if (serial_logfp != NULL)
407 for (count = 0; count < len; count++)
408 serial_logchar (serial_logfp, 'w', str[count] & 0xff, 0);
410 /* Make sure that the log file is as up-to-date as possible,
411 in case we are getting ready to dump core or something. */
412 gdb_flush (serial_logfp);
414 if (serial_debug_p (scb))
418 for (count = 0; count < len; count++)
420 fprintf_unfiltered (gdb_stdlog, "[");
421 serial_logchar (gdb_stdlog, 'w', str[count] & 0xff, 0);
422 fprintf_unfiltered (gdb_stdlog, "]");
424 gdb_flush (gdb_stdlog);
427 return (scb->ops->write (scb, str, len));
431 serial_printf (struct serial *desc, const char *format,...)
435 va_start (args, format);
437 buf = xstrvprintf (format, args);
438 serial_write (desc, buf, strlen (buf));
445 serial_drain_output (struct serial *scb)
447 return scb->ops->drain_output (scb);
451 serial_flush_output (struct serial *scb)
453 return scb->ops->flush_output (scb);
457 serial_flush_input (struct serial *scb)
459 return scb->ops->flush_input (scb);
463 serial_send_break (struct serial *scb)
465 if (serial_logfp != NULL)
466 serial_logchar (serial_logfp, 'w', SERIAL_BREAK, 0);
468 return (scb->ops->send_break (scb));
472 serial_raw (struct serial *scb)
474 scb->ops->go_raw (scb);
478 serial_get_tty_state (struct serial *scb)
480 return scb->ops->get_tty_state (scb);
484 serial_copy_tty_state (struct serial *scb, serial_ttystate ttystate)
486 return scb->ops->copy_tty_state (scb, ttystate);
490 serial_set_tty_state (struct serial *scb, serial_ttystate ttystate)
492 return scb->ops->set_tty_state (scb, ttystate);
496 serial_print_tty_state (struct serial *scb,
497 serial_ttystate ttystate,
498 struct ui_file *stream)
500 scb->ops->print_tty_state (scb, ttystate, stream);
504 serial_noflush_set_tty_state (struct serial *scb,
505 serial_ttystate new_ttystate,
506 serial_ttystate old_ttystate)
508 return scb->ops->noflush_set_tty_state (scb, new_ttystate, old_ttystate);
512 serial_setbaudrate (struct serial *scb, int rate)
514 return scb->ops->setbaudrate (scb, rate);
518 serial_setstopbits (struct serial *scb, int num)
520 return scb->ops->setstopbits (scb, num);
524 serial_can_async_p (struct serial *scb)
526 return (scb->ops->async != NULL);
530 serial_is_async_p (struct serial *scb)
532 return (scb->ops->async != NULL) && (scb->async_handler != NULL);
536 serial_async (struct serial *scb,
537 serial_event_ftype *handler,
540 int changed = ((scb->async_handler == NULL) != (handler == NULL));
542 scb->async_handler = handler;
543 scb->async_context = context;
544 /* Only change mode if there is a need. */
546 scb->ops->async (scb, handler != NULL);
550 deprecated_serial_fd (struct serial *scb)
552 /* FIXME: should this output a warning that deprecated code is being
556 internal_error (__FILE__, __LINE__,
557 _("serial: FD not valid"));
559 return scb->fd; /* sigh */
563 serial_debug (struct serial *scb, int debug_p)
565 scb->debug_p = debug_p;
569 serial_debug_p (struct serial *scb)
571 return scb->debug_p || global_serial_debug_p;
576 serial_wait_handle (struct serial *scb, HANDLE *read, HANDLE *except)
578 if (scb->ops->wait_handle)
579 scb->ops->wait_handle (scb, read, except);
582 *read = (HANDLE) _get_osfhandle (scb->fd);
588 serial_done_wait_handle (struct serial *scb)
590 if (scb->ops->done_wait_handle)
591 scb->ops->done_wait_handle (scb);
596 serial_pipe (struct serial *scbs[2])
598 struct serial_ops *ops;
601 ops = serial_interface_lookup ("pipe");
608 if (gdb_pipe (fildes) == -1)
611 scbs[0] = serial_fdopen_ops (fildes[0], ops);
612 scbs[1] = serial_fdopen_ops (fildes[1], ops);
616 /* Serial set/show framework. */
618 static struct cmd_list_element *serial_set_cmdlist;
619 static struct cmd_list_element *serial_show_cmdlist;
622 serial_set_cmd (char *args, int from_tty)
624 printf_unfiltered ("\"set serial\" must be followed "
625 "by the name of a command.\n");
626 help_list (serial_set_cmdlist, "set serial ", -1, gdb_stdout);
630 serial_show_cmd (char *args, int from_tty)
632 cmd_show_list (serial_show_cmdlist, from_tty, "");
637 _initialize_serial (void)
640 add_com ("connect", class_obscure, connect_command, _("\
641 Connect the terminal directly up to the command monitor.\n\
642 Use <CR>~. or <CR>~^D to break out."));
645 add_prefix_cmd ("serial", class_maintenance, serial_set_cmd, _("\
646 Set default serial/parallel port configuration."),
647 &serial_set_cmdlist, "set serial ",
651 add_prefix_cmd ("serial", class_maintenance, serial_show_cmd, _("\
652 Show default serial/parallel port configuration."),
653 &serial_show_cmdlist, "show serial ",
657 add_setshow_filename_cmd ("remotelogfile", no_class, &serial_logfile, _("\
658 Set filename for remote session recording."), _("\
659 Show filename for remote session recording."), _("\
660 This file is used to record the remote session for future playback\n\
663 NULL, /* FIXME: i18n: */
664 &setlist, &showlist);
666 add_setshow_enum_cmd ("remotelogbase", no_class, logbase_enums,
667 &serial_logbase, _("\
668 Set numerical base for remote session logging"), _("\
669 Show numerical base for remote session logging"), NULL,
671 NULL, /* FIXME: i18n: */
672 &setlist, &showlist);
674 add_setshow_zinteger_cmd ("serial", class_maintenance,
675 &global_serial_debug_p, _("\
676 Set serial debugging."), _("\
677 Show serial debugging."), _("\
678 When non-zero, serial port debugging is enabled."),
680 NULL, /* FIXME: i18n: */
681 &setdebuglist, &showdebuglist);