1 /* Generic serial interface routines
3 Copyright (C) 1992-2016 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/>. */
24 #include "cli/cli-utils.h"
26 extern void _initialize_serial (void);
28 /* Is serial being debugged? */
30 static unsigned int global_serial_debug_p;
32 typedef const struct serial_ops *serial_ops_p;
33 DEF_VEC_P (serial_ops_p);
35 /* Serial I/O handlers. */
37 VEC (serial_ops_p) *serial_ops_list = NULL;
39 /* Pointer to list of scb's. */
41 static struct serial *scb_base;
43 /* Non-NULL gives filename which contains a recording of the remote session,
44 suitable for playback by gdbserver. */
46 static char *serial_logfile = NULL;
47 static struct ui_file *serial_logfp = NULL;
49 static const struct serial_ops *serial_interface_lookup (const char *);
50 static void serial_logchar (struct ui_file *stream,
51 int ch_type, int ch, int timeout);
52 static const char logbase_hex[] = "hex";
53 static const char logbase_octal[] = "octal";
54 static const char logbase_ascii[] = "ascii";
55 static const char *const logbase_enums[] =
56 {logbase_hex, logbase_octal, logbase_ascii, NULL};
57 static const char *serial_logbase = logbase_ascii;
60 static int serial_current_type = 0;
62 /* Log char CH of type CHTYPE, with TIMEOUT. */
64 /* Define bogus char to represent a BREAK. Should be careful to choose a value
65 that can't be confused with a normal char, or an error code. */
66 #define SERIAL_BREAK 1235
69 serial_logchar (struct ui_file *stream, int ch_type, int ch, int timeout)
71 if (ch_type != serial_current_type)
73 fprintf_unfiltered (stream, "\n%c ", ch_type);
74 serial_current_type = ch_type;
77 if (serial_logbase != logbase_ascii)
78 fputc_unfiltered (' ', stream);
83 fprintf_unfiltered (stream, "<Timeout: %d seconds>", timeout);
86 fprintf_unfiltered (stream, "<Error: %s>", safe_strerror (errno));
89 fputs_unfiltered ("<Eof>", stream);
92 fputs_unfiltered ("<Break>", stream);
95 if (serial_logbase == logbase_hex)
96 fprintf_unfiltered (stream, "%02x", ch & 0xff);
97 else if (serial_logbase == logbase_octal)
98 fprintf_unfiltered (stream, "%03o", ch & 0xff);
103 fputs_unfiltered ("\\\\", stream);
106 fputs_unfiltered ("\\b", stream);
109 fputs_unfiltered ("\\f", stream);
112 fputs_unfiltered ("\\n", stream);
115 fputs_unfiltered ("\\r", stream);
118 fputs_unfiltered ("\\t", stream);
121 fputs_unfiltered ("\\v", stream);
124 fprintf_unfiltered (stream,
125 isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF);
132 serial_log_command (struct target_ops *self, const char *cmd)
137 serial_current_type = 'c';
139 fputs_unfiltered ("\nc ", serial_logfp);
140 fputs_unfiltered (cmd, serial_logfp);
142 /* Make sure that the log file is as up-to-date as possible,
143 in case we are getting ready to dump core or something. */
144 gdb_flush (serial_logfp);
148 static const struct serial_ops *
149 serial_interface_lookup (const char *name)
151 const struct serial_ops *ops;
154 for (i = 0; VEC_iterate (serial_ops_p, serial_ops_list, i, ops); ++i)
155 if (strcmp (name, ops->name) == 0)
162 serial_add_interface (const struct serial_ops *optable)
164 VEC_safe_push (serial_ops_p, serial_ops_list, optable);
167 /* Return the open serial device for FD, if found, or NULL if FD is
168 not already opened. */
171 serial_for_fd (int fd)
175 for (scb = scb_base; scb; scb = scb->next)
182 /* Create a new serial for OPS. */
184 static struct serial *
185 new_serial (const struct serial_ops *ops)
189 scb = XCNEW (struct serial);
193 scb->bufp = scb->buf;
200 static struct serial *serial_open_ops_1 (const struct serial_ops *ops,
201 const char *open_name);
203 /* Open up a device or a network socket, depending upon the syntax of NAME. */
206 serial_open (const char *name)
209 const struct serial_ops *ops;
210 const char *open_name = name;
212 if (strcmp (name, "pc") == 0)
213 ops = serial_interface_lookup ("pc");
214 else if (startswith (name, "lpt"))
215 ops = serial_interface_lookup ("parallel");
216 else if (startswith (name, "|"))
218 ops = serial_interface_lookup ("pipe");
219 /* Discard ``|'' and any space before the command itself. */
221 open_name = skip_spaces_const (open_name);
223 /* Check for a colon, suggesting an IP address/port pair.
224 Do this *after* checking for all the interesting prefixes. We
225 don't want to constrain the syntax of what can follow them. */
226 else if (strchr (name, ':'))
227 ops = serial_interface_lookup ("tcp");
229 ops = serial_interface_lookup ("hardwire");
234 return serial_open_ops_1 (ops, open_name);
237 /* Open up a serial for OPS, passing OPEN_NAME to the open method. */
239 static struct serial *
240 serial_open_ops_1 (const struct serial_ops *ops, const char *open_name)
244 scb = new_serial (ops);
246 /* `...->open (...)' would get expanded by the open(2) syscall macro. */
247 if ((*scb->ops->open) (scb, open_name))
253 scb->next = scb_base;
256 if (serial_logfile != NULL)
258 serial_logfp = gdb_fopen (serial_logfile, "w");
259 if (serial_logfp == NULL)
260 perror_with_name (serial_logfile);
269 serial_open_ops (const struct serial_ops *ops)
271 return serial_open_ops_1 (ops, NULL);
274 /* Open a new serial stream using a file handle, using serial
275 interface ops OPS. */
277 static struct serial *
278 serial_fdopen_ops (const int fd, const struct serial_ops *ops)
284 ops = serial_interface_lookup ("terminal");
286 ops = serial_interface_lookup ("hardwire");
292 scb = new_serial (ops);
294 scb->next = scb_base;
297 if ((ops->fdopen) != NULL)
298 (*ops->fdopen) (scb, fd);
306 serial_fdopen (const int fd)
308 return serial_fdopen_ops (fd, NULL);
312 do_serial_close (struct serial *scb, int really_close)
314 struct serial *tmp_scb;
318 fputs_unfiltered ("\nEnd of log\n", serial_logfp);
319 serial_current_type = 0;
321 /* XXX - What if serial_logfp == gdb_stdout or gdb_stderr? */
322 ui_file_delete (serial_logfp);
326 /* ensure that the FD has been taken out of async mode. */
327 if (scb->async_handler != NULL)
328 serial_async (scb, NULL, NULL);
331 scb->ops->close (scb);
333 /* For serial_is_open. */
337 scb_base = scb_base->next;
339 for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
341 if (tmp_scb->next != scb)
344 tmp_scb->next = tmp_scb->next->next;
352 serial_close (struct serial *scb)
354 do_serial_close (scb, 1);
358 serial_un_fdopen (struct serial *scb)
360 do_serial_close (scb, 0);
364 serial_is_open (struct serial *scb)
366 return scb->bufp != NULL;
370 serial_ref (struct serial *scb)
376 serial_unref (struct serial *scb)
379 if (scb->refcnt == 0)
384 serial_readchar (struct serial *scb, int timeout)
388 /* FIXME: cagney/1999-10-11: Don't enable this check until the ASYNC
390 if (0 && serial_is_async_p (scb) && timeout < 0)
391 internal_error (__FILE__, __LINE__,
392 _("serial_readchar: blocking read in async mode"));
394 ch = scb->ops->readchar (scb, timeout);
395 if (serial_logfp != NULL)
397 serial_logchar (serial_logfp, 'r', ch, timeout);
399 /* Make sure that the log file is as up-to-date as possible,
400 in case we are getting ready to dump core or something. */
401 gdb_flush (serial_logfp);
403 if (serial_debug_p (scb))
405 fprintf_unfiltered (gdb_stdlog, "[");
406 serial_logchar (gdb_stdlog, 'r', ch, timeout);
407 fprintf_unfiltered (gdb_stdlog, "]");
408 gdb_flush (gdb_stdlog);
415 serial_write (struct serial *scb, const void *buf, size_t count)
417 if (serial_logfp != NULL)
419 const char *str = (const char *) buf;
422 for (c = 0; c < count; c++)
423 serial_logchar (serial_logfp, 'w', str[c] & 0xff, 0);
425 /* Make sure that the log file is as up-to-date as possible,
426 in case we are getting ready to dump core or something. */
427 gdb_flush (serial_logfp);
429 if (serial_debug_p (scb))
431 const char *str = (const char *) buf;
434 for (c = 0; c < count; c++)
436 fprintf_unfiltered (gdb_stdlog, "[");
437 serial_logchar (gdb_stdlog, 'w', str[c] & 0xff, 0);
438 fprintf_unfiltered (gdb_stdlog, "]");
440 gdb_flush (gdb_stdlog);
443 return (scb->ops->write (scb, buf, count));
447 serial_printf (struct serial *desc, const char *format,...)
451 va_start (args, format);
453 buf = xstrvprintf (format, args);
454 serial_write (desc, buf, strlen (buf));
461 serial_drain_output (struct serial *scb)
463 return scb->ops->drain_output (scb);
467 serial_flush_output (struct serial *scb)
469 return scb->ops->flush_output (scb);
473 serial_flush_input (struct serial *scb)
475 return scb->ops->flush_input (scb);
479 serial_send_break (struct serial *scb)
481 if (serial_logfp != NULL)
482 serial_logchar (serial_logfp, 'w', SERIAL_BREAK, 0);
484 return (scb->ops->send_break (scb));
488 serial_raw (struct serial *scb)
490 scb->ops->go_raw (scb);
494 serial_get_tty_state (struct serial *scb)
496 return scb->ops->get_tty_state (scb);
500 serial_copy_tty_state (struct serial *scb, serial_ttystate ttystate)
502 return scb->ops->copy_tty_state (scb, ttystate);
506 serial_set_tty_state (struct serial *scb, serial_ttystate ttystate)
508 return scb->ops->set_tty_state (scb, ttystate);
512 serial_print_tty_state (struct serial *scb,
513 serial_ttystate ttystate,
514 struct ui_file *stream)
516 scb->ops->print_tty_state (scb, ttystate, stream);
520 serial_noflush_set_tty_state (struct serial *scb,
521 serial_ttystate new_ttystate,
522 serial_ttystate old_ttystate)
524 return scb->ops->noflush_set_tty_state (scb, new_ttystate, old_ttystate);
528 serial_setbaudrate (struct serial *scb, int rate)
530 return scb->ops->setbaudrate (scb, rate);
534 serial_setstopbits (struct serial *scb, int num)
536 return scb->ops->setstopbits (scb, num);
542 serial_setparity (struct serial *scb, int parity)
544 return scb->ops->setparity (scb, parity);
548 serial_can_async_p (struct serial *scb)
550 return (scb->ops->async != NULL);
554 serial_is_async_p (struct serial *scb)
556 return (scb->ops->async != NULL) && (scb->async_handler != NULL);
560 serial_async (struct serial *scb,
561 serial_event_ftype *handler,
564 int changed = ((scb->async_handler == NULL) != (handler == NULL));
566 scb->async_handler = handler;
567 scb->async_context = context;
568 /* Only change mode if there is a need. */
570 scb->ops->async (scb, handler != NULL);
574 serial_debug (struct serial *scb, int debug_p)
576 scb->debug_p = debug_p;
580 serial_debug_p (struct serial *scb)
582 return scb->debug_p || global_serial_debug_p;
587 serial_wait_handle (struct serial *scb, HANDLE *read, HANDLE *except)
589 if (scb->ops->wait_handle)
590 scb->ops->wait_handle (scb, read, except);
593 *read = (HANDLE) _get_osfhandle (scb->fd);
599 serial_done_wait_handle (struct serial *scb)
601 if (scb->ops->done_wait_handle)
602 scb->ops->done_wait_handle (scb);
607 serial_pipe (struct serial *scbs[2])
609 const struct serial_ops *ops;
612 ops = serial_interface_lookup ("pipe");
619 if (gdb_pipe (fildes) == -1)
622 scbs[0] = serial_fdopen_ops (fildes[0], ops);
623 scbs[1] = serial_fdopen_ops (fildes[1], ops);
627 /* Serial set/show framework. */
629 static struct cmd_list_element *serial_set_cmdlist;
630 static struct cmd_list_element *serial_show_cmdlist;
633 serial_set_cmd (char *args, int from_tty)
635 printf_unfiltered ("\"set serial\" must be followed "
636 "by the name of a command.\n");
637 help_list (serial_set_cmdlist, "set serial ", all_commands, gdb_stdout);
641 serial_show_cmd (char *args, int from_tty)
643 cmd_show_list (serial_show_cmdlist, from_tty, "");
646 /* Baud rate specified for talking to serial target systems. Default
647 is left as -1, so targets can choose their own defaults. */
648 /* FIXME: This means that "show serial baud" and gr_files_info can
649 print -1 or (unsigned int)-1. This is a Bad User Interface. */
654 serial_baud_show_cmd (struct ui_file *file, int from_tty,
655 struct cmd_list_element *c, const char *value)
657 fprintf_filtered (file, _("Baud rate for remote serial I/O is %s.\n"),
661 /* Parity for serial port. */
663 int serial_parity = GDBPARITY_NONE;
665 static const char parity_none[] = "none";
666 static const char parity_odd[] = "odd";
667 static const char parity_even[] = "even";
668 static const char *const parity_enums[] =
669 {parity_none, parity_odd, parity_even, NULL};
670 static const char *parity = parity_none;
672 /* Set serial_parity value. */
675 set_parity (char *ignore_args, int from_tty, struct cmd_list_element *c)
677 if (parity == parity_odd)
678 serial_parity = GDBPARITY_ODD;
679 else if (parity == parity_even)
680 serial_parity = GDBPARITY_EVEN;
682 serial_parity = GDBPARITY_NONE;
686 _initialize_serial (void)
689 add_com ("connect", class_obscure, connect_command, _("\
690 Connect the terminal directly up to the command monitor.\n\
691 Use <CR>~. or <CR>~^D to break out."));
694 add_prefix_cmd ("serial", class_maintenance, serial_set_cmd, _("\
695 Set default serial/parallel port configuration."),
696 &serial_set_cmdlist, "set serial ",
700 add_prefix_cmd ("serial", class_maintenance, serial_show_cmd, _("\
701 Show default serial/parallel port configuration."),
702 &serial_show_cmdlist, "show serial ",
706 /* If target is open when baud changes, it doesn't take effect until
707 the next open (I think, not sure). */
708 add_setshow_zinteger_cmd ("baud", no_class, &baud_rate, _("\
709 Set baud rate for remote serial I/O."), _("\
710 Show baud rate for remote serial I/O."), _("\
711 This value is used to set the speed of the serial port when debugging\n\
712 using remote targets."),
714 serial_baud_show_cmd,
715 &serial_set_cmdlist, &serial_show_cmdlist);
717 add_setshow_enum_cmd ("parity", no_class, parity_enums,
719 Set parity for remote serial I/O"), _("\
720 Show parity for remote serial I/O"), NULL,
722 NULL, /* FIXME: i18n: */
723 &serial_set_cmdlist, &serial_show_cmdlist);
725 add_setshow_filename_cmd ("remotelogfile", no_class, &serial_logfile, _("\
726 Set filename for remote session recording."), _("\
727 Show filename for remote session recording."), _("\
728 This file is used to record the remote session for future playback\n\
731 NULL, /* FIXME: i18n: */
732 &setlist, &showlist);
734 add_setshow_enum_cmd ("remotelogbase", no_class, logbase_enums,
735 &serial_logbase, _("\
736 Set numerical base for remote session logging"), _("\
737 Show numerical base for remote session logging"), NULL,
739 NULL, /* FIXME: i18n: */
740 &setlist, &showlist);
742 add_setshow_zuinteger_cmd ("serial", class_maintenance,
743 &global_serial_debug_p, _("\
744 Set serial debugging."), _("\
745 Show serial debugging."), _("\
746 When non-zero, serial port debugging is enabled."),
748 NULL, /* FIXME: i18n: */
749 &setdebuglist, &showdebuglist);