1 /* Generic serial interface routines
3 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2004, 2005, 2006, 2007 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 (strncmp (name, "lpt", 3) == 0)
188 ops = serial_interface_lookup ("parallel");
189 else if (strncmp (name, "|", 1) == 0)
191 ops = serial_interface_lookup ("pipe");
192 /* Discard ``|'' and any space before the command itself. */
194 while (isspace (*open_name))
197 /* Check for a colon, suggesting an IP address/port pair.
198 Do this *after* checking for all the interesting prefixes. We
199 don't want to constrain the syntax of what can follow them. */
200 else if (strchr (name, ':'))
201 ops = serial_interface_lookup ("tcp");
203 ops = serial_interface_lookup ("hardwire");
208 scb = XMALLOC (struct serial);
213 scb->bufp = scb->buf;
216 /* `...->open (...)' would get expanded by an the open(2) syscall macro. */
217 if ((*scb->ops->open) (scb, open_name))
223 scb->name = xstrdup (name);
224 scb->next = scb_base;
227 scb->async_state = 0;
228 scb->async_handler = NULL;
229 scb->async_context = NULL;
232 last_serial_opened = scb;
234 if (serial_logfile != NULL)
236 serial_logfp = gdb_fopen (serial_logfile, "w");
237 if (serial_logfp == NULL)
238 perror_with_name (serial_logfile);
244 /* Return the open serial device for FD, if found, or NULL if FD
245 is not already opened. */
248 serial_for_fd (int fd)
251 struct serial_ops *ops;
253 for (scb = scb_base; scb; scb = scb->next)
261 serial_fdopen (const int fd)
264 struct serial_ops *ops;
266 for (scb = scb_base; scb; scb = scb->next)
273 ops = serial_interface_lookup ("terminal");
275 ops = serial_interface_lookup ("hardwire");
280 scb = XCALLOC (1, struct serial);
285 scb->bufp = scb->buf;
290 scb->next = scb_base;
293 scb->async_state = 0;
294 scb->async_handler = NULL;
295 scb->async_context = NULL;
298 last_serial_opened = scb;
304 do_serial_close (struct serial *scb, int really_close)
306 struct serial *tmp_scb;
308 last_serial_opened = NULL;
312 fputs_unfiltered ("\nEnd of log\n", serial_logfp);
313 serial_current_type = 0;
315 /* XXX - What if serial_logfp == gdb_stdout or gdb_stderr? */
316 ui_file_delete (serial_logfp);
320 /* This is bogus. It's not our fault if you pass us a bad scb...! Rob, you
321 should fix your code instead. */
330 /* ensure that the FD has been taken out of async mode */
331 if (scb->async_handler != NULL)
332 serial_async (scb, NULL, NULL);
335 scb->ops->close (scb);
341 scb_base = scb_base->next;
343 for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
345 if (tmp_scb->next != scb)
348 tmp_scb->next = tmp_scb->next->next;
356 serial_close (struct serial *scb)
358 do_serial_close (scb, 1);
362 serial_un_fdopen (struct serial *scb)
364 do_serial_close (scb, 0);
368 serial_readchar (struct serial *scb, int timeout)
372 /* FIXME: cagney/1999-10-11: Don't enable this check until the ASYNC
374 if (0 && serial_is_async_p (scb) && timeout < 0)
375 internal_error (__FILE__, __LINE__,
376 _("serial_readchar: blocking read in async mode"));
378 ch = scb->ops->readchar (scb, timeout);
379 if (serial_logfp != NULL)
381 serial_logchar (serial_logfp, 'r', ch, timeout);
383 /* Make sure that the log file is as up-to-date as possible,
384 in case we are getting ready to dump core or something. */
385 gdb_flush (serial_logfp);
387 if (serial_debug_p (scb))
389 fprintf_unfiltered (gdb_stdlog, "[");
390 serial_logchar (gdb_stdlog, 'r', ch, timeout);
391 fprintf_unfiltered (gdb_stdlog, "]");
392 gdb_flush (gdb_stdlog);
399 serial_write (struct serial *scb, const char *str, int len)
401 if (serial_logfp != NULL)
405 for (count = 0; count < len; count++)
406 serial_logchar (serial_logfp, 'w', str[count] & 0xff, 0);
408 /* Make sure that the log file is as up-to-date as possible,
409 in case we are getting ready to dump core or something. */
410 gdb_flush (serial_logfp);
413 return (scb->ops->write (scb, str, len));
417 serial_printf (struct serial *desc, const char *format,...)
421 va_start (args, format);
423 buf = xstrvprintf (format, args);
424 serial_write (desc, buf, strlen (buf));
431 serial_drain_output (struct serial *scb)
433 return scb->ops->drain_output (scb);
437 serial_flush_output (struct serial *scb)
439 return scb->ops->flush_output (scb);
443 serial_flush_input (struct serial *scb)
445 return scb->ops->flush_input (scb);
449 serial_send_break (struct serial *scb)
451 if (serial_logfp != NULL)
452 serial_logchar (serial_logfp, 'w', SERIAL_BREAK, 0);
454 return (scb->ops->send_break (scb));
458 serial_raw (struct serial *scb)
460 scb->ops->go_raw (scb);
464 serial_get_tty_state (struct serial *scb)
466 return scb->ops->get_tty_state (scb);
470 serial_set_tty_state (struct serial *scb, serial_ttystate ttystate)
472 return scb->ops->set_tty_state (scb, ttystate);
476 serial_print_tty_state (struct serial *scb,
477 serial_ttystate ttystate,
478 struct ui_file *stream)
480 scb->ops->print_tty_state (scb, ttystate, stream);
484 serial_noflush_set_tty_state (struct serial *scb,
485 serial_ttystate new_ttystate,
486 serial_ttystate old_ttystate)
488 return scb->ops->noflush_set_tty_state (scb, new_ttystate, old_ttystate);
492 serial_setbaudrate (struct serial *scb, int rate)
494 return scb->ops->setbaudrate (scb, rate);
498 serial_setstopbits (struct serial *scb, int num)
500 return scb->ops->setstopbits (scb, num);
504 serial_can_async_p (struct serial *scb)
506 return (scb->ops->async != NULL);
510 serial_is_async_p (struct serial *scb)
512 return (scb->ops->async != NULL) && (scb->async_handler != NULL);
516 serial_async (struct serial *scb,
517 serial_event_ftype *handler,
520 /* Only change mode if there is a need. */
521 if ((scb->async_handler == NULL)
522 != (handler == NULL))
523 scb->ops->async (scb, handler != NULL);
524 scb->async_handler = handler;
525 scb->async_context = context;
529 deprecated_serial_fd (struct serial *scb)
531 /* FIXME: should this output a warning that deprecated code is being
535 internal_error (__FILE__, __LINE__,
536 _("serial: FD not valid"));
538 return scb->fd; /* sigh */
542 serial_debug (struct serial *scb, int debug_p)
544 scb->debug_p = debug_p;
548 serial_debug_p (struct serial *scb)
550 return scb->debug_p || global_serial_debug_p;
555 serial_wait_handle (struct serial *scb, HANDLE *read, HANDLE *except)
557 if (scb->ops->wait_handle)
558 scb->ops->wait_handle (scb, read, except);
561 *read = (HANDLE) _get_osfhandle (scb->fd);
567 serial_done_wait_handle (struct serial *scb)
569 if (scb->ops->done_wait_handle)
570 scb->ops->done_wait_handle (scb);
575 /* The connect command is #if 0 because I hadn't thought of an elegant
576 way to wait for I/O on two `struct serial *'s simultaneously. Two
577 solutions came to mind:
579 1) Fork, and have have one fork handle the to user direction,
580 and have the other hand the to target direction. This
581 obviously won't cut it for MSDOS.
583 2) Use something like select. This assumes that stdin and
584 the target side can both be waited on via the same
585 mechanism. This may not be true for DOS, if GDB is
586 talking to the target via a TCP socket.
587 -grossman, 8 Jun 93 */
589 /* Connect the user directly to the remote system. This command acts just like
590 the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
592 static struct serial *tty_desc; /* Controlling terminal */
595 cleanup_tty (serial_ttystate ttystate)
597 printf_unfiltered ("\r\n[Exiting connect mode]\r\n");
598 serial_set_tty_state (tty_desc, ttystate);
600 serial_close (tty_desc);
604 connect_command (char *args, int fromtty)
608 serial_ttystate ttystate;
609 struct serial *port_desc; /* TTY port */
614 fprintf_unfiltered (gdb_stderr, "This command takes no args. They have been ignored.\n");
616 printf_unfiltered ("[Entering connect mode. Use ~. or ~^D to escape]\n");
618 tty_desc = serial_fdopen (0);
619 port_desc = last_serial_opened;
621 ttystate = serial_get_tty_state (tty_desc);
623 serial_raw (tty_desc);
624 serial_raw (port_desc);
626 make_cleanup (cleanup_tty, ttystate);
632 mask = serial_wait_2 (tty_desc, port_desc, -1);
640 c = serial_readchar (tty_desc, 0);
642 if (c == SERIAL_TIMEOUT)
646 perror_with_name (_("connect"));
649 serial_write (port_desc, &cx, 1);
664 if (c == '.' || c == '\004')
678 c = serial_readchar (port_desc, 0);
680 if (c == SERIAL_TIMEOUT)
684 perror_with_name (_("connect"));
688 serial_write (tty_desc, &cx, 1);
695 /* Serial set/show framework. */
697 static struct cmd_list_element *serial_set_cmdlist;
698 static struct cmd_list_element *serial_show_cmdlist;
701 serial_set_cmd (char *args, int from_tty)
703 printf_unfiltered ("\"set serial\" must be followed by the name of a command.\n");
704 help_list (serial_set_cmdlist, "set serial ", -1, gdb_stdout);
708 serial_show_cmd (char *args, int from_tty)
710 cmd_show_list (serial_show_cmdlist, from_tty, "");
715 _initialize_serial (void)
718 add_com ("connect", class_obscure, connect_command, _("\
719 Connect the terminal directly up to the command monitor.\n\
720 Use <CR>~. or <CR>~^D to break out."));
723 add_prefix_cmd ("serial", class_maintenance, serial_set_cmd, _("\
724 Set default serial/parallel port configuration."),
725 &serial_set_cmdlist, "set serial ",
729 add_prefix_cmd ("serial", class_maintenance, serial_show_cmd, _("\
730 Show default serial/parallel port configuration."),
731 &serial_show_cmdlist, "show serial ",
735 add_setshow_filename_cmd ("remotelogfile", no_class, &serial_logfile, _("\
736 Set filename for remote session recording."), _("\
737 Show filename for remote session recording."), _("\
738 This file is used to record the remote session for future playback\n\
741 NULL, /* FIXME: i18n: */
742 &setlist, &showlist);
744 add_setshow_enum_cmd ("remotelogbase", no_class, logbase_enums,
745 &serial_logbase, _("\
746 Set numerical base for remote session logging"), _("\
747 Show numerical base for remote session logging"), NULL,
749 NULL, /* FIXME: i18n: */
750 &setlist, &showlist);
752 add_setshow_zinteger_cmd ("serial", class_maintenance,
753 &global_serial_debug_p, _("\
754 Set serial debugging."), _("\
755 Show serial debugging."), _("\
756 When non-zero, serial port debugging is enabled."),
758 NULL, /* FIXME: i18n: */
759 &setdebuglist, &showdebuglist);