1 /* Generic serial interface routines
3 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 2001, 2002 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., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, 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);
237 serial_fdopen (const int fd)
240 struct serial_ops *ops;
242 for (scb = scb_base; scb; scb = scb->next)
249 ops = serial_interface_lookup ("hardwire");
254 scb = XMALLOC (struct serial);
259 scb->bufp = scb->buf;
264 scb->next = scb_base;
267 scb->async_state = 0;
268 scb->async_handler = NULL;
269 scb->async_context = NULL;
272 last_serial_opened = scb;
278 do_serial_close (struct serial *scb, int really_close)
280 struct serial *tmp_scb;
282 last_serial_opened = NULL;
286 fputs_unfiltered ("\nEnd of log\n", serial_logfp);
287 serial_current_type = 0;
289 /* XXX - What if serial_logfp == gdb_stdout or gdb_stderr? */
290 ui_file_delete (serial_logfp);
294 /* This is bogus. It's not our fault if you pass us a bad scb...! Rob, you
295 should fix your code instead. */
304 /* ensure that the FD has been taken out of async mode */
305 if (scb->async_handler != NULL)
306 serial_async (scb, NULL, NULL);
309 scb->ops->close (scb);
315 scb_base = scb_base->next;
317 for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
319 if (tmp_scb->next != scb)
322 tmp_scb->next = tmp_scb->next->next;
330 serial_close (struct serial *scb)
332 do_serial_close (scb, 1);
336 serial_un_fdopen (struct serial *scb)
338 do_serial_close (scb, 0);
342 serial_readchar (struct serial *scb, int timeout)
346 /* FIXME: cagney/1999-10-11: Don't enable this check until the ASYNC
348 if (0 && serial_is_async_p (scb) && timeout < 0)
349 internal_error (__FILE__, __LINE__,
350 "serial_readchar: blocking read in async mode");
352 ch = scb->ops->readchar (scb, timeout);
353 if (serial_logfp != NULL)
355 serial_logchar (serial_logfp, 'r', ch, timeout);
357 /* Make sure that the log file is as up-to-date as possible,
358 in case we are getting ready to dump core or something. */
359 gdb_flush (serial_logfp);
361 if (serial_debug_p (scb))
363 fprintf_unfiltered (gdb_stdlog, "[");
364 serial_logchar (gdb_stdlog, 'r', ch, timeout);
365 fprintf_unfiltered (gdb_stdlog, "]");
366 gdb_flush (gdb_stdlog);
373 serial_write (struct serial *scb, const char *str, int len)
375 if (serial_logfp != NULL)
379 for (count = 0; count < len; count++)
380 serial_logchar (serial_logfp, 'w', str[count] & 0xff, 0);
382 /* Make sure that the log file is as up-to-date as possible,
383 in case we are getting ready to dump core or something. */
384 gdb_flush (serial_logfp);
387 return (scb->ops->write (scb, str, len));
391 serial_printf (struct serial *desc, const char *format,...)
395 va_start (args, format);
397 buf = xstrvprintf (format, args);
398 serial_write (desc, buf, strlen (buf));
405 serial_drain_output (struct serial *scb)
407 return scb->ops->drain_output (scb);
411 serial_flush_output (struct serial *scb)
413 return scb->ops->flush_output (scb);
417 serial_flush_input (struct serial *scb)
419 return scb->ops->flush_input (scb);
423 serial_send_break (struct serial *scb)
425 if (serial_logfp != NULL)
426 serial_logchar (serial_logfp, 'w', SERIAL_BREAK, 0);
428 return (scb->ops->send_break (scb));
432 serial_raw (struct serial *scb)
434 scb->ops->go_raw (scb);
438 serial_get_tty_state (struct serial *scb)
440 return scb->ops->get_tty_state (scb);
444 serial_set_tty_state (struct serial *scb, serial_ttystate ttystate)
446 return scb->ops->set_tty_state (scb, ttystate);
450 serial_print_tty_state (struct serial *scb,
451 serial_ttystate ttystate,
452 struct ui_file *stream)
454 scb->ops->print_tty_state (scb, ttystate, stream);
458 serial_noflush_set_tty_state (struct serial *scb,
459 serial_ttystate new_ttystate,
460 serial_ttystate old_ttystate)
462 return scb->ops->noflush_set_tty_state (scb, new_ttystate, old_ttystate);
466 serial_setbaudrate (struct serial *scb, int rate)
468 return scb->ops->setbaudrate (scb, rate);
472 serial_setstopbits (struct serial *scb, int num)
474 return scb->ops->setstopbits (scb, num);
478 serial_can_async_p (struct serial *scb)
480 return (scb->ops->async != NULL);
484 serial_is_async_p (struct serial *scb)
486 return (scb->ops->async != NULL) && (scb->async_handler != NULL);
490 serial_async (struct serial *scb,
491 serial_event_ftype *handler,
494 /* Only change mode if there is a need. */
495 if ((scb->async_handler == NULL)
496 != (handler == NULL))
497 scb->ops->async (scb, handler != NULL);
498 scb->async_handler = handler;
499 scb->async_context = context;
503 deprecated_serial_fd (struct serial *scb)
505 /* FIXME: should this output a warning that deprecated code is being
509 internal_error (__FILE__, __LINE__,
510 "serial: FD not valid");
512 return scb->fd; /* sigh */
516 serial_debug (struct serial *scb, int debug_p)
518 scb->debug_p = debug_p;
522 serial_debug_p (struct serial *scb)
524 return scb->debug_p || global_serial_debug_p;
529 /* The connect command is #if 0 because I hadn't thought of an elegant
530 way to wait for I/O on two `struct serial *'s simultaneously. Two
531 solutions came to mind:
533 1) Fork, and have have one fork handle the to user direction,
534 and have the other hand the to target direction. This
535 obviously won't cut it for MSDOS.
537 2) Use something like select. This assumes that stdin and
538 the target side can both be waited on via the same
539 mechanism. This may not be true for DOS, if GDB is
540 talking to the target via a TCP socket.
541 -grossman, 8 Jun 93 */
543 /* Connect the user directly to the remote system. This command acts just like
544 the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
546 static struct serial *tty_desc; /* Controlling terminal */
549 cleanup_tty (serial_ttystate ttystate)
551 printf_unfiltered ("\r\n[Exiting connect mode]\r\n");
552 serial_set_tty_state (tty_desc, ttystate);
554 serial_close (tty_desc);
558 connect_command (char *args, int fromtty)
562 serial_ttystate ttystate;
563 struct serial *port_desc; /* TTY port */
568 fprintf_unfiltered (gdb_stderr, "This command takes no args. They have been ignored.\n");
570 printf_unfiltered ("[Entering connect mode. Use ~. or ~^D to escape]\n");
572 tty_desc = serial_fdopen (0);
573 port_desc = last_serial_opened;
575 ttystate = serial_get_tty_state (tty_desc);
577 serial_raw (tty_desc);
578 serial_raw (port_desc);
580 make_cleanup (cleanup_tty, ttystate);
586 mask = serial_wait_2 (tty_desc, port_desc, -1);
594 c = serial_readchar (tty_desc, 0);
596 if (c == SERIAL_TIMEOUT)
600 perror_with_name ("connect");
603 serial_write (port_desc, &cx, 1);
618 if (c == '.' || c == '\004')
632 c = serial_readchar (port_desc, 0);
634 if (c == SERIAL_TIMEOUT)
638 perror_with_name ("connect");
642 serial_write (tty_desc, &cx, 1);
649 /* Serial set/show framework. */
651 static struct cmd_list_element *serial_set_cmdlist;
652 static struct cmd_list_element *serial_show_cmdlist;
655 serial_set_cmd (char *args, int from_tty)
657 printf_unfiltered ("\"set serial\" must be followed by the name of a command.\n");
658 help_list (serial_set_cmdlist, "set serial ", -1, gdb_stdout);
662 serial_show_cmd (char *args, int from_tty)
664 cmd_show_list (serial_show_cmdlist, from_tty, "");
669 _initialize_serial (void)
672 add_com ("connect", class_obscure, connect_command,
673 "Connect the terminal directly up to the command monitor.\n\
674 Use <CR>~. or <CR>~^D to break out.");
677 add_prefix_cmd ("serial", class_maintenance, serial_set_cmd, "\
678 Set default serial/parallel port configuration.",
679 &serial_set_cmdlist, "set serial ",
683 add_prefix_cmd ("serial", class_maintenance, serial_show_cmd, "\
684 Show default serial/parallel port configuration.",
685 &serial_show_cmdlist, "show serial ",
689 deprecated_add_show_from_set
690 (add_set_cmd ("remotelogfile", no_class,
691 var_filename, (char *) &serial_logfile,
692 "Set filename for remote session recording.\n\
693 This file is used to record the remote session for future playback\n\
698 deprecated_add_show_from_set
699 (add_set_enum_cmd ("remotelogbase", no_class,
700 logbase_enums, &serial_logbase,
701 "Set numerical base for remote session logging",
705 deprecated_add_show_from_set
706 (add_set_cmd ("serial",
709 (char *)&global_serial_debug_p,
710 "Set serial debugging.\n\
711 When non-zero, serial port debugging is enabled.", &setdebuglist),