1 /* Generic serial interface routines
3 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 2001, 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
6 This file is part of GDB.
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.
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.
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
20 Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
26 #include "gdb_string.h"
29 extern void _initialize_serial (void);
31 /* Is serial being debugged? */
33 static int global_serial_debug_p;
35 /* Linked list of serial I/O handlers */
37 static struct serial_ops *serial_ops_list = NULL;
39 /* This is the last serial stream opened. Used by connect command. */
41 static struct serial *last_serial_opened = NULL;
43 /* Pointer to list of scb's. */
45 static struct serial *scb_base;
47 /* Non-NULL gives filename which contains a recording of the remote session,
48 suitable for playback by gdbserver. */
50 static char *serial_logfile = NULL;
51 static struct ui_file *serial_logfp = NULL;
53 static struct serial_ops *serial_interface_lookup (char *);
54 static void serial_logchar (struct ui_file *stream, int ch_type, int ch, int timeout);
55 static const char logbase_hex[] = "hex";
56 static const char logbase_octal[] = "octal";
57 static const char logbase_ascii[] = "ascii";
58 static const char *logbase_enums[] =
59 {logbase_hex, logbase_octal, logbase_ascii, NULL};
60 static const char *serial_logbase = logbase_ascii;
63 static int serial_current_type = 0;
65 /* Log char CH of type CHTYPE, with TIMEOUT */
67 /* Define bogus char to represent a BREAK. Should be careful to choose a value
68 that can't be confused with a normal char, or an error code. */
69 #define SERIAL_BREAK 1235
72 serial_logchar (struct ui_file *stream, int ch_type, int ch, int timeout)
74 if (ch_type != serial_current_type)
76 fprintf_unfiltered (stream, "\n%c ", ch_type);
77 serial_current_type = ch_type;
80 if (serial_logbase != logbase_ascii)
81 fputc_unfiltered (' ', stream);
86 fprintf_unfiltered (stream, "<Timeout: %d seconds>", timeout);
89 fprintf_unfiltered (stream, "<Error: %s>", safe_strerror (errno));
92 fputs_unfiltered ("<Eof>", stream);
95 fputs_unfiltered ("<Break>", stream);
98 if (serial_logbase == logbase_hex)
99 fprintf_unfiltered (stream, "%02x", ch & 0xff);
100 else if (serial_logbase == logbase_octal)
101 fprintf_unfiltered (stream, "%03o", ch & 0xff);
106 fputs_unfiltered ("\\\\", stream);
109 fputs_unfiltered ("\\b", stream);
112 fputs_unfiltered ("\\f", stream);
115 fputs_unfiltered ("\\n", stream);
118 fputs_unfiltered ("\\r", stream);
121 fputs_unfiltered ("\\t", stream);
124 fputs_unfiltered ("\\v", stream);
127 fprintf_unfiltered (stream, isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF);
134 serial_log_command (const char *cmd)
139 serial_current_type = 'c';
141 fputs_unfiltered ("\nc ", serial_logfp);
142 fputs_unfiltered (cmd, serial_logfp);
144 /* Make sure that the log file is as up-to-date as possible,
145 in case we are getting ready to dump core or something. */
146 gdb_flush (serial_logfp);
150 static struct serial_ops *
151 serial_interface_lookup (char *name)
153 struct serial_ops *ops;
155 for (ops = serial_ops_list; ops; ops = ops->next)
156 if (strcmp (name, ops->name) == 0)
163 serial_add_interface (struct serial_ops *optable)
165 optable->next = serial_ops_list;
166 serial_ops_list = optable;
169 /* Open up a device or a network socket, depending upon the syntax of NAME. */
172 serial_open (const char *name)
175 struct serial_ops *ops;
176 const char *open_name = name;
178 for (scb = scb_base; scb; scb = scb->next)
179 if (scb->name && strcmp (scb->name, name) == 0)
185 if (strcmp (name, "pc") == 0)
186 ops = serial_interface_lookup ("pc");
187 else if (strchr (name, ':'))
188 ops = serial_interface_lookup ("tcp");
189 else if (strncmp (name, "lpt", 3) == 0)
190 ops = serial_interface_lookup ("parallel");
191 else if (strncmp (name, "|", 1) == 0)
193 ops = serial_interface_lookup ("pipe");
194 open_name = name + 1; /* discard ``|'' */
197 ops = serial_interface_lookup ("hardwire");
202 scb = XMALLOC (struct serial);
207 scb->bufp = scb->buf;
209 if (scb->ops->open (scb, open_name))
215 scb->name = xstrdup (name);
216 scb->next = scb_base;
219 scb->async_state = 0;
220 scb->async_handler = NULL;
221 scb->async_context = NULL;
224 last_serial_opened = scb;
226 if (serial_logfile != NULL)
228 serial_logfp = gdb_fopen (serial_logfile, "w");
229 if (serial_logfp == NULL)
230 perror_with_name (serial_logfile);
236 /* Return the open serial device for FD, if found, or NULL if FD
237 is not already opened. */
240 serial_for_fd (int fd)
243 struct serial_ops *ops;
245 for (scb = scb_base; scb; scb = scb->next)
253 serial_fdopen (const int fd)
256 struct serial_ops *ops;
258 for (scb = scb_base; scb; scb = scb->next)
265 ops = serial_interface_lookup ("terminal");
267 ops = serial_interface_lookup ("hardwire");
272 scb = XCALLOC (1, struct serial);
277 scb->bufp = scb->buf;
282 scb->next = scb_base;
285 scb->async_state = 0;
286 scb->async_handler = NULL;
287 scb->async_context = NULL;
290 last_serial_opened = scb;
296 do_serial_close (struct serial *scb, int really_close)
298 struct serial *tmp_scb;
300 last_serial_opened = NULL;
304 fputs_unfiltered ("\nEnd of log\n", serial_logfp);
305 serial_current_type = 0;
307 /* XXX - What if serial_logfp == gdb_stdout or gdb_stderr? */
308 ui_file_delete (serial_logfp);
312 /* This is bogus. It's not our fault if you pass us a bad scb...! Rob, you
313 should fix your code instead. */
322 /* ensure that the FD has been taken out of async mode */
323 if (scb->async_handler != NULL)
324 serial_async (scb, NULL, NULL);
327 scb->ops->close (scb);
333 scb_base = scb_base->next;
335 for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
337 if (tmp_scb->next != scb)
340 tmp_scb->next = tmp_scb->next->next;
348 serial_close (struct serial *scb)
350 do_serial_close (scb, 1);
354 serial_un_fdopen (struct serial *scb)
356 do_serial_close (scb, 0);
360 serial_readchar (struct serial *scb, int timeout)
364 /* FIXME: cagney/1999-10-11: Don't enable this check until the ASYNC
366 if (0 && serial_is_async_p (scb) && timeout < 0)
367 internal_error (__FILE__, __LINE__,
368 _("serial_readchar: blocking read in async mode"));
370 ch = scb->ops->readchar (scb, timeout);
371 if (serial_logfp != NULL)
373 serial_logchar (serial_logfp, 'r', ch, timeout);
375 /* Make sure that the log file is as up-to-date as possible,
376 in case we are getting ready to dump core or something. */
377 gdb_flush (serial_logfp);
379 if (serial_debug_p (scb))
381 fprintf_unfiltered (gdb_stdlog, "[");
382 serial_logchar (gdb_stdlog, 'r', ch, timeout);
383 fprintf_unfiltered (gdb_stdlog, "]");
384 gdb_flush (gdb_stdlog);
391 serial_write (struct serial *scb, const char *str, int len)
393 if (serial_logfp != NULL)
397 for (count = 0; count < len; count++)
398 serial_logchar (serial_logfp, 'w', str[count] & 0xff, 0);
400 /* Make sure that the log file is as up-to-date as possible,
401 in case we are getting ready to dump core or something. */
402 gdb_flush (serial_logfp);
405 return (scb->ops->write (scb, str, len));
409 serial_printf (struct serial *desc, const char *format,...)
413 va_start (args, format);
415 buf = xstrvprintf (format, args);
416 serial_write (desc, buf, strlen (buf));
423 serial_drain_output (struct serial *scb)
425 return scb->ops->drain_output (scb);
429 serial_flush_output (struct serial *scb)
431 return scb->ops->flush_output (scb);
435 serial_flush_input (struct serial *scb)
437 return scb->ops->flush_input (scb);
441 serial_send_break (struct serial *scb)
443 if (serial_logfp != NULL)
444 serial_logchar (serial_logfp, 'w', SERIAL_BREAK, 0);
446 return (scb->ops->send_break (scb));
450 serial_raw (struct serial *scb)
452 scb->ops->go_raw (scb);
456 serial_get_tty_state (struct serial *scb)
458 return scb->ops->get_tty_state (scb);
462 serial_set_tty_state (struct serial *scb, serial_ttystate ttystate)
464 return scb->ops->set_tty_state (scb, ttystate);
468 serial_print_tty_state (struct serial *scb,
469 serial_ttystate ttystate,
470 struct ui_file *stream)
472 scb->ops->print_tty_state (scb, ttystate, stream);
476 serial_noflush_set_tty_state (struct serial *scb,
477 serial_ttystate new_ttystate,
478 serial_ttystate old_ttystate)
480 return scb->ops->noflush_set_tty_state (scb, new_ttystate, old_ttystate);
484 serial_setbaudrate (struct serial *scb, int rate)
486 return scb->ops->setbaudrate (scb, rate);
490 serial_setstopbits (struct serial *scb, int num)
492 return scb->ops->setstopbits (scb, num);
496 serial_can_async_p (struct serial *scb)
498 return (scb->ops->async != NULL);
502 serial_is_async_p (struct serial *scb)
504 return (scb->ops->async != NULL) && (scb->async_handler != NULL);
508 serial_async (struct serial *scb,
509 serial_event_ftype *handler,
512 /* Only change mode if there is a need. */
513 if ((scb->async_handler == NULL)
514 != (handler == NULL))
515 scb->ops->async (scb, handler != NULL);
516 scb->async_handler = handler;
517 scb->async_context = context;
521 deprecated_serial_fd (struct serial *scb)
523 /* FIXME: should this output a warning that deprecated code is being
527 internal_error (__FILE__, __LINE__,
528 _("serial: FD not valid"));
530 return scb->fd; /* sigh */
534 serial_debug (struct serial *scb, int debug_p)
536 scb->debug_p = debug_p;
540 serial_debug_p (struct serial *scb)
542 return scb->debug_p || global_serial_debug_p;
547 serial_wait_handle (struct serial *scb, HANDLE *read, HANDLE *except)
549 if (scb->ops->wait_handle)
550 scb->ops->wait_handle (scb, read, except);
553 *read = (HANDLE) _get_osfhandle (scb->fd);
560 /* The connect command is #if 0 because I hadn't thought of an elegant
561 way to wait for I/O on two `struct serial *'s simultaneously. Two
562 solutions came to mind:
564 1) Fork, and have have one fork handle the to user direction,
565 and have the other hand the to target direction. This
566 obviously won't cut it for MSDOS.
568 2) Use something like select. This assumes that stdin and
569 the target side can both be waited on via the same
570 mechanism. This may not be true for DOS, if GDB is
571 talking to the target via a TCP socket.
572 -grossman, 8 Jun 93 */
574 /* Connect the user directly to the remote system. This command acts just like
575 the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
577 static struct serial *tty_desc; /* Controlling terminal */
580 cleanup_tty (serial_ttystate ttystate)
582 printf_unfiltered ("\r\n[Exiting connect mode]\r\n");
583 serial_set_tty_state (tty_desc, ttystate);
585 serial_close (tty_desc);
589 connect_command (char *args, int fromtty)
593 serial_ttystate ttystate;
594 struct serial *port_desc; /* TTY port */
599 fprintf_unfiltered (gdb_stderr, "This command takes no args. They have been ignored.\n");
601 printf_unfiltered ("[Entering connect mode. Use ~. or ~^D to escape]\n");
603 tty_desc = serial_fdopen (0);
604 port_desc = last_serial_opened;
606 ttystate = serial_get_tty_state (tty_desc);
608 serial_raw (tty_desc);
609 serial_raw (port_desc);
611 make_cleanup (cleanup_tty, ttystate);
617 mask = serial_wait_2 (tty_desc, port_desc, -1);
625 c = serial_readchar (tty_desc, 0);
627 if (c == SERIAL_TIMEOUT)
631 perror_with_name (_("connect"));
634 serial_write (port_desc, &cx, 1);
649 if (c == '.' || c == '\004')
663 c = serial_readchar (port_desc, 0);
665 if (c == SERIAL_TIMEOUT)
669 perror_with_name (_("connect"));
673 serial_write (tty_desc, &cx, 1);
680 /* Serial set/show framework. */
682 static struct cmd_list_element *serial_set_cmdlist;
683 static struct cmd_list_element *serial_show_cmdlist;
686 serial_set_cmd (char *args, int from_tty)
688 printf_unfiltered ("\"set serial\" must be followed by the name of a command.\n");
689 help_list (serial_set_cmdlist, "set serial ", -1, gdb_stdout);
693 serial_show_cmd (char *args, int from_tty)
695 cmd_show_list (serial_show_cmdlist, from_tty, "");
700 _initialize_serial (void)
703 add_com ("connect", class_obscure, connect_command, _("\
704 Connect the terminal directly up to the command monitor.\n\
705 Use <CR>~. or <CR>~^D to break out."));
708 add_prefix_cmd ("serial", class_maintenance, serial_set_cmd, _("\
709 Set default serial/parallel port configuration."),
710 &serial_set_cmdlist, "set serial ",
714 add_prefix_cmd ("serial", class_maintenance, serial_show_cmd, _("\
715 Show default serial/parallel port configuration."),
716 &serial_show_cmdlist, "show serial ",
720 add_setshow_filename_cmd ("remotelogfile", no_class, &serial_logfile, _("\
721 Set filename for remote session recording."), _("\
722 Show filename for remote session recording."), _("\
723 This file is used to record the remote session for future playback\n\
726 NULL, /* FIXME: i18n: */
727 &setlist, &showlist);
729 add_setshow_enum_cmd ("remotelogbase", no_class, logbase_enums,
730 &serial_logbase, _("\
731 Set numerical base for remote session logging"), _("\
732 Show numerical base for remote session logging"), NULL,
734 NULL, /* FIXME: i18n: */
735 &setlist, &showlist);
737 add_setshow_zinteger_cmd ("serial", class_maintenance,
738 &global_serial_debug_p, _("\
739 Set serial debugging."), _("\
740 Show serial debugging."), _("\
741 When non-zero, serial port debugging is enabled."),
743 NULL, /* FIXME: i18n: */
744 &setdebuglist, &showdebuglist);