1 /* Generic serial interface routines
2 Copyright 1992, 1993, 1996, 1997, 1999, 2000 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
24 #include "gdb_string.h"
27 extern void _initialize_serial (void);
29 /* Is serial being debugged? */
31 static int global_serial_debug_p;
33 /* Linked list of serial I/O handlers */
35 static struct serial_ops *serial_ops_list = NULL;
37 /* This is the last serial stream opened. Used by connect command. */
39 static serial_t last_serial_opened = NULL;
41 /* Pointer to list of scb's. */
43 static serial_t scb_base;
45 /* Non-NULL gives filename which contains a recording of the remote session,
46 suitable for playback by gdbserver. */
48 static char *serial_logfile = NULL;
49 static struct ui_file *serial_logfp = NULL;
51 static struct serial_ops *serial_interface_lookup (char *);
52 static void serial_logchar (struct ui_file *stream, int ch_type, int ch, int timeout);
53 static const char logbase_hex[] = "hex";
54 static const char logbase_octal[] = "octal";
55 static const char logbase_ascii[] = "ascii";
56 static const char *logbase_enums[] =
57 {logbase_hex, logbase_octal, logbase_ascii, NULL};
58 static const char *serial_logbase = logbase_ascii;
62 static int serial_current_type = 0;
64 /* Log char CH of type CHTYPE, with TIMEOUT */
66 /* Define bogus char to represent a BREAK. Should be careful to choose a value
67 that can't be confused with a normal char, or an error code. */
68 #define SERIAL_BREAK 1235
71 serial_logchar (struct ui_file *stream, int ch_type, int ch, int timeout)
73 if (ch_type != serial_current_type)
75 fprintf_unfiltered (stream, "\n%c ", ch_type);
76 serial_current_type = ch_type;
79 if (serial_logbase != logbase_ascii)
80 fputc_unfiltered (' ', stream);
85 fprintf_unfiltered (stream, "<Timeout: %d seconds>", timeout);
88 fprintf_unfiltered (stream, "<Error: %s>", safe_strerror (errno));
91 fputs_unfiltered ("<Eof>", stream);
94 fputs_unfiltered ("<Break>", stream);
97 if (serial_logbase == logbase_hex)
98 fprintf_unfiltered (stream, "%02x", ch & 0xff);
99 else if (serial_logbase == logbase_octal)
100 fprintf_unfiltered (stream, "%03o", ch & 0xff);
105 fputs_unfiltered ("\\\\", stream);
108 fputs_unfiltered ("\\b", stream);
111 fputs_unfiltered ("\\f", stream);
114 fputs_unfiltered ("\\n", stream);
117 fputs_unfiltered ("\\r", stream);
120 fputs_unfiltered ("\\t", stream);
123 fputs_unfiltered ("\\v", stream);
126 fprintf_unfiltered (stream, isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF);
133 serial_log_command (const char *cmd)
138 serial_current_type = 'c';
140 fputs_unfiltered ("\nc ", serial_logfp);
141 fputs_unfiltered (cmd, serial_logfp);
143 /* Make sure that the log file is as up-to-date as possible,
144 in case we are getting ready to dump core or something. */
145 gdb_flush (serial_logfp);
149 static struct serial_ops *
150 serial_interface_lookup (char *name)
152 struct serial_ops *ops;
154 for (ops = serial_ops_list; ops; ops = ops->next)
155 if (strcmp (name, ops->name) == 0)
162 serial_add_interface (struct serial_ops *optable)
164 optable->next = serial_ops_list;
165 serial_ops_list = optable;
168 /* Open up a device or a network socket, depending upon the syntax of NAME. */
171 serial_open (const char *name)
174 struct serial_ops *ops;
175 const char *open_name = name;
177 for (scb = scb_base; scb; scb = scb->next)
178 if (scb->name && strcmp (scb->name, name) == 0)
184 if (strcmp (name, "ocd") == 0)
185 ops = serial_interface_lookup ("ocd");
186 else if (strcmp (name, "pc") == 0)
187 ops = serial_interface_lookup ("pc");
188 else if (strchr (name, ':'))
189 ops = serial_interface_lookup ("tcp");
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 open_name = name + 1; /* discard ``|'' */
198 ops = serial_interface_lookup ("hardwire");
203 scb = (serial_t) xmalloc (sizeof (struct _serial_t));
208 scb->bufp = scb->buf;
210 if (scb->ops->open (scb, open_name))
216 scb->name = strsave (name);
217 scb->next = scb_base;
220 scb->async_state = 0;
221 scb->async_handler = NULL;
222 scb->async_context = NULL;
225 last_serial_opened = scb;
227 if (serial_logfile != NULL)
229 serial_logfp = gdb_fopen (serial_logfile, "w");
230 if (serial_logfp == NULL)
231 perror_with_name (serial_logfile);
238 serial_fdopen (const int fd)
241 struct serial_ops *ops;
243 for (scb = scb_base; scb; scb = scb->next)
250 ops = serial_interface_lookup ("hardwire");
255 scb = (serial_t) xmalloc (sizeof (struct _serial_t));
260 scb->bufp = scb->buf;
265 scb->next = scb_base;
268 scb->async_state = 0;
269 scb->async_handler = NULL;
270 scb->async_context = NULL;
273 last_serial_opened = scb;
279 do_serial_close (serial_t scb, int really_close)
283 last_serial_opened = NULL;
287 fputs_unfiltered ("\nEnd of log\n", serial_logfp);
288 serial_current_type = 0;
290 /* XXX - What if serial_logfp == gdb_stdout or gdb_stderr? */
291 ui_file_delete (serial_logfp);
295 /* This is bogus. It's not our fault if you pass us a bad scb...! Rob, you
296 should fix your code instead. */
305 /* ensure that the FD has been taken out of async mode */
306 if (scb->async_handler != NULL)
307 serial_async (scb, NULL, NULL);
310 scb->ops->close (scb);
316 scb_base = scb_base->next;
318 for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
320 if (tmp_scb->next != scb)
323 tmp_scb->next = tmp_scb->next->next;
331 serial_close (serial_t scb)
333 do_serial_close (scb, 1);
337 serial_un_fdopen (serial_t scb)
339 do_serial_close (scb, 0);
343 serial_readchar (serial_t scb, int timeout)
347 /* FIXME: cagney/1999-10-11: Don't enable this check until the ASYNC
349 if (0 && SERIAL_IS_ASYNC_P (scb) && timeout < 0)
350 internal_error ("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 (serial_t 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 (serial_t desc, const char *format,...)
395 va_start (args, format);
397 xvasprintf (&buf, format, args);
398 SERIAL_WRITE (desc, buf, strlen (buf));
405 serial_drain_output (serial_t scb)
407 return scb->ops->drain_output (scb);
411 serial_flush_output (serial_t scb)
413 return scb->ops->flush_output (scb);
417 serial_flush_input (serial_t scb)
419 return scb->ops->flush_input (scb);
423 serial_send_break (serial_t 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 (serial_t scb)
434 scb->ops->go_raw (scb);
438 serial_get_tty_state (serial_t scb)
440 return scb->ops->get_tty_state (scb);
444 serial_set_tty_state (serial_t scb, serial_ttystate ttystate)
446 return scb->ops->set_tty_state (scb, ttystate);
450 serial_print_tty_state (serial_t 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 (serial_t 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 (serial_t scb, int rate)
468 return scb->ops->setbaudrate (scb, rate);
472 serial_setstopbits (serial_t scb, int num)
474 return scb->ops->setstopbits (scb, num);
478 serial_can_async_p (serial_t scb)
480 return (scb->ops->async != NULL);
484 serial_is_async_p (serial_t scb)
486 return (scb->ops->async != NULL) && (scb->async_handler != NULL);
490 serial_async (serial_t 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 (serial_t scb)
505 /* FIXME: should this output a warning that deprecated code is being
509 internal_error ("serial: FD not valid");
511 return scb->fd; /* sigh */
515 serial_debug (serial_t scb, int debug_p)
517 scb->debug_p = debug_p;
521 serial_debug_p (serial_t scb)
523 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 serial_t's simultaneously. Two solutions
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.
544 /* Connect the user directly to the remote system. This command acts just like
545 the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
547 static serial_t tty_desc; /* Controlling terminal */
550 cleanup_tty (serial_ttystate ttystate)
552 printf_unfiltered ("\r\n[Exiting connect mode]\r\n");
553 SERIAL_SET_TTY_STATE (tty_desc, ttystate);
555 SERIAL_CLOSE (tty_desc);
559 connect_command (char *args, int fromtty)
563 serial_ttystate ttystate;
564 serial_t port_desc; /* TTY port */
569 fprintf_unfiltered (gdb_stderr, "This command takes no args. They have been ignored.\n");
571 printf_unfiltered ("[Entering connect mode. Use ~. or ~^D to escape]\n");
573 tty_desc = SERIAL_FDOPEN (0);
574 port_desc = last_serial_opened;
576 ttystate = SERIAL_GET_TTY_STATE (tty_desc);
578 SERIAL_RAW (tty_desc);
579 SERIAL_RAW (port_desc);
581 make_cleanup (cleanup_tty, ttystate);
587 mask = SERIAL_WAIT_2 (tty_desc, port_desc, -1);
595 c = SERIAL_READCHAR (tty_desc, 0);
597 if (c == SERIAL_TIMEOUT)
601 perror_with_name ("connect");
604 SERIAL_WRITE (port_desc, &cx, 1);
619 if (c == '.' || c == '\004')
633 c = SERIAL_READCHAR (port_desc, 0);
635 if (c == SERIAL_TIMEOUT)
639 perror_with_name ("connect");
643 SERIAL_WRITE (tty_desc, &cx, 1);
651 _initialize_serial (void)
654 add_com ("connect", class_obscure, connect_command,
655 "Connect the terminal directly up to the command monitor.\n\
656 Use <CR>~. or <CR>~^D to break out.");
660 (add_set_cmd ("remotelogfile", no_class,
661 var_filename, (char *) &serial_logfile,
662 "Set filename for remote session recording.\n\
663 This file is used to record the remote session for future playback\n\
669 (add_set_enum_cmd ("remotelogbase", no_class,
670 logbase_enums, &serial_logbase,
671 "Set numerical base for remote session logging",
675 add_show_from_set (add_set_cmd ("serial",
678 (char *)&global_serial_debug_p,
679 "Set serial debugging.\n\
680 When non-zero, serial port debugging is enabled.", &setdebuglist),