1 /* Generic serial interface routines
3 Copyright (C) 1992-2014 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/>. */
25 #include "cli/cli-utils.h"
27 extern void _initialize_serial (void);
29 /* Is serial being debugged? */
31 static unsigned int global_serial_debug_p;
33 typedef const struct serial_ops *serial_ops_p;
34 DEF_VEC_P (serial_ops_p);
36 /* Serial I/O handlers. */
38 VEC (serial_ops_p) *serial_ops_list = NULL;
40 /* Pointer to list of scb's. */
42 static struct serial *scb_base;
44 /* Non-NULL gives filename which contains a recording of the remote session,
45 suitable for playback by gdbserver. */
47 static char *serial_logfile = NULL;
48 static struct ui_file *serial_logfp = NULL;
50 static const struct serial_ops *serial_interface_lookup (const char *);
51 static void serial_logchar (struct ui_file *stream,
52 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 *const logbase_enums[] =
57 {logbase_hex, logbase_octal, logbase_ascii, NULL};
58 static const char *serial_logbase = logbase_ascii;
61 static int serial_current_type = 0;
63 /* Log char CH of type CHTYPE, with TIMEOUT. */
65 /* Define bogus char to represent a BREAK. Should be careful to choose a value
66 that can't be confused with a normal char, or an error code. */
67 #define SERIAL_BREAK 1235
70 serial_logchar (struct ui_file *stream, int ch_type, int ch, int timeout)
72 if (ch_type != serial_current_type)
74 fprintf_unfiltered (stream, "\n%c ", ch_type);
75 serial_current_type = ch_type;
78 if (serial_logbase != logbase_ascii)
79 fputc_unfiltered (' ', stream);
84 fprintf_unfiltered (stream, "<Timeout: %d seconds>", timeout);
87 fprintf_unfiltered (stream, "<Error: %s>", safe_strerror (errno));
90 fputs_unfiltered ("<Eof>", stream);
93 fputs_unfiltered ("<Break>", stream);
96 if (serial_logbase == logbase_hex)
97 fprintf_unfiltered (stream, "%02x", ch & 0xff);
98 else if (serial_logbase == logbase_octal)
99 fprintf_unfiltered (stream, "%03o", ch & 0xff);
104 fputs_unfiltered ("\\\\", stream);
107 fputs_unfiltered ("\\b", stream);
110 fputs_unfiltered ("\\f", stream);
113 fputs_unfiltered ("\\n", stream);
116 fputs_unfiltered ("\\r", stream);
119 fputs_unfiltered ("\\t", stream);
122 fputs_unfiltered ("\\v", stream);
125 fprintf_unfiltered (stream,
126 isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF);
133 serial_log_command (struct target_ops *self, 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 const struct serial_ops *
150 serial_interface_lookup (const char *name)
152 const struct serial_ops *ops;
155 for (i = 0; VEC_iterate (serial_ops_p, serial_ops_list, i, ops); ++i)
156 if (strcmp (name, ops->name) == 0)
163 serial_add_interface (const struct serial_ops *optable)
165 VEC_safe_push (serial_ops_p, serial_ops_list, optable);
168 /* Return the open serial device for FD, if found, or NULL if FD is
169 not already opened. */
172 serial_for_fd (int fd)
176 for (scb = scb_base; scb; scb = scb->next)
183 /* Open up a device or a network socket, depending upon the syntax of NAME. */
186 serial_open (const char *name)
189 const struct serial_ops *ops;
190 const char *open_name = name;
192 if (strcmp (name, "pc") == 0)
193 ops = serial_interface_lookup ("pc");
194 else if (strncmp (name, "lpt", 3) == 0)
195 ops = serial_interface_lookup ("parallel");
196 else if (strncmp (name, "|", 1) == 0)
198 ops = serial_interface_lookup ("pipe");
199 /* Discard ``|'' and any space before the command itself. */
201 open_name = skip_spaces_const (open_name);
203 /* Check for a colon, suggesting an IP address/port pair.
204 Do this *after* checking for all the interesting prefixes. We
205 don't want to constrain the syntax of what can follow them. */
206 else if (strchr (name, ':'))
207 ops = serial_interface_lookup ("tcp");
209 ops = serial_interface_lookup ("hardwire");
214 scb = XNEW (struct serial);
219 scb->bufp = scb->buf;
223 /* `...->open (...)' would get expanded by the open(2) syscall macro. */
224 if ((*scb->ops->open) (scb, open_name))
230 scb->name = xstrdup (name);
231 scb->next = scb_base;
233 scb->async_state = 0;
234 scb->async_handler = NULL;
235 scb->async_context = NULL;
238 if (serial_logfile != NULL)
240 serial_logfp = gdb_fopen (serial_logfile, "w");
241 if (serial_logfp == NULL)
242 perror_with_name (serial_logfile);
248 /* Open a new serial stream using a file handle, using serial
249 interface ops OPS. */
251 static struct serial *
252 serial_fdopen_ops (const int fd, const struct serial_ops *ops)
258 ops = serial_interface_lookup ("terminal");
260 ops = serial_interface_lookup ("hardwire");
266 scb = XCNEW (struct serial);
271 scb->bufp = scb->buf;
276 scb->next = scb_base;
278 scb->async_state = 0;
279 scb->async_handler = NULL;
280 scb->async_context = NULL;
283 if ((ops->fdopen) != NULL)
284 (*ops->fdopen) (scb, fd);
292 serial_fdopen (const int fd)
294 return serial_fdopen_ops (fd, NULL);
298 do_serial_close (struct serial *scb, int really_close)
300 struct serial *tmp_scb;
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 /* ensure that the FD has been taken out of async mode. */
313 if (scb->async_handler != NULL)
314 serial_async (scb, NULL, NULL);
317 scb->ops->close (scb);
322 /* For serial_is_open. */
326 scb_base = scb_base->next;
328 for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
330 if (tmp_scb->next != scb)
333 tmp_scb->next = tmp_scb->next->next;
341 serial_close (struct serial *scb)
343 do_serial_close (scb, 1);
347 serial_un_fdopen (struct serial *scb)
349 do_serial_close (scb, 0);
353 serial_is_open (struct serial *scb)
355 return scb->bufp != NULL;
359 serial_ref (struct serial *scb)
365 serial_unref (struct serial *scb)
368 if (scb->refcnt == 0)
373 serial_readchar (struct serial *scb, int timeout)
377 /* FIXME: cagney/1999-10-11: Don't enable this check until the ASYNC
379 if (0 && serial_is_async_p (scb) && timeout < 0)
380 internal_error (__FILE__, __LINE__,
381 _("serial_readchar: blocking read in async mode"));
383 ch = scb->ops->readchar (scb, timeout);
384 if (serial_logfp != NULL)
386 serial_logchar (serial_logfp, 'r', ch, timeout);
388 /* Make sure that the log file is as up-to-date as possible,
389 in case we are getting ready to dump core or something. */
390 gdb_flush (serial_logfp);
392 if (serial_debug_p (scb))
394 fprintf_unfiltered (gdb_stdlog, "[");
395 serial_logchar (gdb_stdlog, 'r', ch, timeout);
396 fprintf_unfiltered (gdb_stdlog, "]");
397 gdb_flush (gdb_stdlog);
404 serial_write (struct serial *scb, const void *buf, size_t count)
406 if (serial_logfp != NULL)
408 const char *str = buf;
411 for (c = 0; c < count; c++)
412 serial_logchar (serial_logfp, 'w', str[c] & 0xff, 0);
414 /* Make sure that the log file is as up-to-date as possible,
415 in case we are getting ready to dump core or something. */
416 gdb_flush (serial_logfp);
418 if (serial_debug_p (scb))
420 const char *str = buf;
423 for (c = 0; c < count; c++)
425 fprintf_unfiltered (gdb_stdlog, "[");
426 serial_logchar (gdb_stdlog, 'w', str[c] & 0xff, 0);
427 fprintf_unfiltered (gdb_stdlog, "]");
429 gdb_flush (gdb_stdlog);
432 return (scb->ops->write (scb, buf, count));
436 serial_printf (struct serial *desc, const char *format,...)
440 va_start (args, format);
442 buf = xstrvprintf (format, args);
443 serial_write (desc, buf, strlen (buf));
450 serial_drain_output (struct serial *scb)
452 return scb->ops->drain_output (scb);
456 serial_flush_output (struct serial *scb)
458 return scb->ops->flush_output (scb);
462 serial_flush_input (struct serial *scb)
464 return scb->ops->flush_input (scb);
468 serial_send_break (struct serial *scb)
470 if (serial_logfp != NULL)
471 serial_logchar (serial_logfp, 'w', SERIAL_BREAK, 0);
473 return (scb->ops->send_break (scb));
477 serial_raw (struct serial *scb)
479 scb->ops->go_raw (scb);
483 serial_get_tty_state (struct serial *scb)
485 return scb->ops->get_tty_state (scb);
489 serial_copy_tty_state (struct serial *scb, serial_ttystate ttystate)
491 return scb->ops->copy_tty_state (scb, ttystate);
495 serial_set_tty_state (struct serial *scb, serial_ttystate ttystate)
497 return scb->ops->set_tty_state (scb, ttystate);
501 serial_print_tty_state (struct serial *scb,
502 serial_ttystate ttystate,
503 struct ui_file *stream)
505 scb->ops->print_tty_state (scb, ttystate, stream);
509 serial_noflush_set_tty_state (struct serial *scb,
510 serial_ttystate new_ttystate,
511 serial_ttystate old_ttystate)
513 return scb->ops->noflush_set_tty_state (scb, new_ttystate, old_ttystate);
517 serial_setbaudrate (struct serial *scb, int rate)
519 return scb->ops->setbaudrate (scb, rate);
523 serial_setstopbits (struct serial *scb, int num)
525 return scb->ops->setstopbits (scb, num);
529 serial_can_async_p (struct serial *scb)
531 return (scb->ops->async != NULL);
535 serial_is_async_p (struct serial *scb)
537 return (scb->ops->async != NULL) && (scb->async_handler != NULL);
541 serial_async (struct serial *scb,
542 serial_event_ftype *handler,
545 int changed = ((scb->async_handler == NULL) != (handler == NULL));
547 scb->async_handler = handler;
548 scb->async_context = context;
549 /* Only change mode if there is a need. */
551 scb->ops->async (scb, handler != NULL);
555 serial_debug (struct serial *scb, int debug_p)
557 scb->debug_p = debug_p;
561 serial_debug_p (struct serial *scb)
563 return scb->debug_p || global_serial_debug_p;
568 serial_wait_handle (struct serial *scb, HANDLE *read, HANDLE *except)
570 if (scb->ops->wait_handle)
571 scb->ops->wait_handle (scb, read, except);
574 *read = (HANDLE) _get_osfhandle (scb->fd);
580 serial_done_wait_handle (struct serial *scb)
582 if (scb->ops->done_wait_handle)
583 scb->ops->done_wait_handle (scb);
588 serial_pipe (struct serial *scbs[2])
590 const struct serial_ops *ops;
593 ops = serial_interface_lookup ("pipe");
600 if (gdb_pipe (fildes) == -1)
603 scbs[0] = serial_fdopen_ops (fildes[0], ops);
604 scbs[1] = serial_fdopen_ops (fildes[1], ops);
608 /* Serial set/show framework. */
610 static struct cmd_list_element *serial_set_cmdlist;
611 static struct cmd_list_element *serial_show_cmdlist;
614 serial_set_cmd (char *args, int from_tty)
616 printf_unfiltered ("\"set serial\" must be followed "
617 "by the name of a command.\n");
618 help_list (serial_set_cmdlist, "set serial ", all_commands, gdb_stdout);
622 serial_show_cmd (char *args, int from_tty)
624 cmd_show_list (serial_show_cmdlist, from_tty, "");
627 /* Baud rate specified for talking to serial target systems. Default
628 is left as -1, so targets can choose their own defaults. */
629 /* FIXME: This means that "show serial baud" and gr_files_info can
630 print -1 or (unsigned int)-1. This is a Bad User Interface. */
635 serial_baud_show_cmd (struct ui_file *file, int from_tty,
636 struct cmd_list_element *c, const char *value)
638 fprintf_filtered (file, _("Baud rate for remote serial I/O is %s.\n"),
643 _initialize_serial (void)
646 add_com ("connect", class_obscure, connect_command, _("\
647 Connect the terminal directly up to the command monitor.\n\
648 Use <CR>~. or <CR>~^D to break out."));
651 add_prefix_cmd ("serial", class_maintenance, serial_set_cmd, _("\
652 Set default serial/parallel port configuration."),
653 &serial_set_cmdlist, "set serial ",
657 add_prefix_cmd ("serial", class_maintenance, serial_show_cmd, _("\
658 Show default serial/parallel port configuration."),
659 &serial_show_cmdlist, "show serial ",
663 /* If target is open when baud changes, it doesn't take effect until
664 the next open (I think, not sure). */
665 add_setshow_zinteger_cmd ("baud", no_class, &baud_rate, _("\
666 Set baud rate for remote serial I/O."), _("\
667 Show baud rate for remote serial I/O."), _("\
668 This value is used to set the speed of the serial port when debugging\n\
669 using remote targets."),
671 serial_baud_show_cmd,
672 &serial_set_cmdlist, &serial_show_cmdlist);
674 add_setshow_filename_cmd ("remotelogfile", no_class, &serial_logfile, _("\
675 Set filename for remote session recording."), _("\
676 Show filename for remote session recording."), _("\
677 This file is used to record the remote session for future playback\n\
680 NULL, /* FIXME: i18n: */
681 &setlist, &showlist);
683 add_setshow_enum_cmd ("remotelogbase", no_class, logbase_enums,
684 &serial_logbase, _("\
685 Set numerical base for remote session logging"), _("\
686 Show numerical base for remote session logging"), NULL,
688 NULL, /* FIXME: i18n: */
689 &setlist, &showlist);
691 add_setshow_zuinteger_cmd ("serial", class_maintenance,
692 &global_serial_debug_p, _("\
693 Set serial debugging."), _("\
694 Show serial debugging."), _("\
695 When non-zero, serial port debugging is enabled."),
697 NULL, /* FIXME: i18n: */
698 &setdebuglist, &showdebuglist);