1 /* Generic serial interface routines
3 Copyright (C) 1992-2017 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 /* Is serial being debugged? */
28 static unsigned int global_serial_debug_p;
30 typedef const struct serial_ops *serial_ops_p;
31 DEF_VEC_P (serial_ops_p);
33 /* Serial I/O handlers. */
35 VEC (serial_ops_p) *serial_ops_list = NULL;
37 /* Pointer to list of scb's. */
39 static struct serial *scb_base;
41 /* Non-NULL gives filename which contains a recording of the remote session,
42 suitable for playback by gdbserver. */
44 static char *serial_logfile = NULL;
45 static struct ui_file *serial_logfp = NULL;
47 static const struct serial_ops *serial_interface_lookup (const char *);
48 static void serial_logchar (struct ui_file *stream,
49 int ch_type, int ch, int timeout);
50 static const char logbase_hex[] = "hex";
51 static const char logbase_octal[] = "octal";
52 static const char logbase_ascii[] = "ascii";
53 static const char *const logbase_enums[] =
54 {logbase_hex, logbase_octal, logbase_ascii, NULL};
55 static const char *serial_logbase = logbase_ascii;
58 static int serial_current_type = 0;
60 /* Log char CH of type CHTYPE, with TIMEOUT. */
62 /* Define bogus char to represent a BREAK. Should be careful to choose a value
63 that can't be confused with a normal char, or an error code. */
64 #define SERIAL_BREAK 1235
67 serial_logchar (struct ui_file *stream, int ch_type, int ch, int timeout)
69 if (ch_type != serial_current_type)
71 fprintf_unfiltered (stream, "\n%c ", ch_type);
72 serial_current_type = ch_type;
75 if (serial_logbase != logbase_ascii)
76 fputc_unfiltered (' ', stream);
81 fprintf_unfiltered (stream, "<Timeout: %d seconds>", timeout);
84 fprintf_unfiltered (stream, "<Error: %s>", safe_strerror (errno));
87 fputs_unfiltered ("<Eof>", stream);
90 fputs_unfiltered ("<Break>", stream);
93 if (serial_logbase == logbase_hex)
94 fprintf_unfiltered (stream, "%02x", ch & 0xff);
95 else if (serial_logbase == logbase_octal)
96 fprintf_unfiltered (stream, "%03o", ch & 0xff);
101 fputs_unfiltered ("\\\\", stream);
104 fputs_unfiltered ("\\b", stream);
107 fputs_unfiltered ("\\f", stream);
110 fputs_unfiltered ("\\n", stream);
113 fputs_unfiltered ("\\r", stream);
116 fputs_unfiltered ("\\t", stream);
119 fputs_unfiltered ("\\v", stream);
122 fprintf_unfiltered (stream,
123 isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF);
130 serial_log_command (struct target_ops *self, const char *cmd)
135 serial_current_type = 'c';
137 fputs_unfiltered ("\nc ", serial_logfp);
138 fputs_unfiltered (cmd, serial_logfp);
140 /* Make sure that the log file is as up-to-date as possible,
141 in case we are getting ready to dump core or something. */
142 gdb_flush (serial_logfp);
146 static const struct serial_ops *
147 serial_interface_lookup (const char *name)
149 const struct serial_ops *ops;
152 for (i = 0; VEC_iterate (serial_ops_p, serial_ops_list, i, ops); ++i)
153 if (strcmp (name, ops->name) == 0)
160 serial_add_interface (const struct serial_ops *optable)
162 VEC_safe_push (serial_ops_p, serial_ops_list, optable);
165 /* Return the open serial device for FD, if found, or NULL if FD is
166 not already opened. */
169 serial_for_fd (int fd)
173 for (scb = scb_base; scb; scb = scb->next)
180 /* Create a new serial for OPS. */
182 static struct serial *
183 new_serial (const struct serial_ops *ops)
187 scb = XCNEW (struct serial);
191 scb->bufp = scb->buf;
198 static struct serial *serial_open_ops_1 (const struct serial_ops *ops,
199 const char *open_name);
201 /* Open up a device or a network socket, depending upon the syntax of NAME. */
204 serial_open (const char *name)
207 const struct serial_ops *ops;
208 const char *open_name = name;
210 if (startswith (name, "|"))
212 ops = serial_interface_lookup ("pipe");
213 /* Discard ``|'' and any space before the command itself. */
215 open_name = skip_spaces (open_name);
217 /* Check for a colon, suggesting an IP address/port pair.
218 Do this *after* checking for all the interesting prefixes. We
219 don't want to constrain the syntax of what can follow them. */
220 else if (strchr (name, ':'))
221 ops = serial_interface_lookup ("tcp");
223 ops = serial_interface_lookup ("hardwire");
228 return serial_open_ops_1 (ops, open_name);
231 /* Open up a serial for OPS, passing OPEN_NAME to the open method. */
233 static struct serial *
234 serial_open_ops_1 (const struct serial_ops *ops, const char *open_name)
238 scb = new_serial (ops);
240 /* `...->open (...)' would get expanded by the open(2) syscall macro. */
241 if ((*scb->ops->open) (scb, open_name))
247 scb->next = scb_base;
250 if (serial_logfile != NULL)
252 stdio_file_up file (new stdio_file ());
254 if (!file->open (serial_logfile, "w"))
255 perror_with_name (serial_logfile);
257 serial_logfp = file.release ();
266 serial_open_ops (const struct serial_ops *ops)
268 return serial_open_ops_1 (ops, NULL);
271 /* Open a new serial stream using a file handle, using serial
272 interface ops OPS. */
274 static struct serial *
275 serial_fdopen_ops (const int fd, const struct serial_ops *ops)
281 ops = serial_interface_lookup ("terminal");
283 ops = serial_interface_lookup ("hardwire");
289 scb = new_serial (ops);
291 scb->next = scb_base;
294 if ((ops->fdopen) != NULL)
295 (*ops->fdopen) (scb, fd);
303 serial_fdopen (const int fd)
305 return serial_fdopen_ops (fd, NULL);
309 do_serial_close (struct serial *scb, int really_close)
311 struct serial *tmp_scb;
315 fputs_unfiltered ("\nEnd of log\n", serial_logfp);
316 serial_current_type = 0;
318 /* XXX - What if serial_logfp == gdb_stdout or gdb_stderr? */
323 /* ensure that the FD has been taken out of async mode. */
324 if (scb->async_handler != NULL)
325 serial_async (scb, NULL, NULL);
328 scb->ops->close (scb);
330 /* For serial_is_open. */
334 scb_base = scb_base->next;
336 for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
338 if (tmp_scb->next != scb)
341 tmp_scb->next = tmp_scb->next->next;
349 serial_close (struct serial *scb)
351 do_serial_close (scb, 1);
355 serial_un_fdopen (struct serial *scb)
357 do_serial_close (scb, 0);
361 serial_is_open (struct serial *scb)
363 return scb->bufp != NULL;
367 serial_ref (struct serial *scb)
373 serial_unref (struct serial *scb)
376 if (scb->refcnt == 0)
381 serial_readchar (struct serial *scb, int timeout)
385 /* FIXME: cagney/1999-10-11: Don't enable this check until the ASYNC
387 if (0 && serial_is_async_p (scb) && timeout < 0)
388 internal_error (__FILE__, __LINE__,
389 _("serial_readchar: blocking read in async mode"));
391 ch = scb->ops->readchar (scb, timeout);
392 if (serial_logfp != NULL)
394 serial_logchar (serial_logfp, 'r', ch, timeout);
396 /* Make sure that the log file is as up-to-date as possible,
397 in case we are getting ready to dump core or something. */
398 gdb_flush (serial_logfp);
400 if (serial_debug_p (scb))
402 fprintf_unfiltered (gdb_stdlog, "[");
403 serial_logchar (gdb_stdlog, 'r', ch, timeout);
404 fprintf_unfiltered (gdb_stdlog, "]");
405 gdb_flush (gdb_stdlog);
412 serial_write (struct serial *scb, const void *buf, size_t count)
414 if (serial_logfp != NULL)
416 const char *str = (const char *) buf;
419 for (c = 0; c < count; c++)
420 serial_logchar (serial_logfp, 'w', str[c] & 0xff, 0);
422 /* Make sure that the log file is as up-to-date as possible,
423 in case we are getting ready to dump core or something. */
424 gdb_flush (serial_logfp);
426 if (serial_debug_p (scb))
428 const char *str = (const char *) buf;
431 for (c = 0; c < count; c++)
433 fprintf_unfiltered (gdb_stdlog, "[");
434 serial_logchar (gdb_stdlog, 'w', str[c] & 0xff, 0);
435 fprintf_unfiltered (gdb_stdlog, "]");
437 gdb_flush (gdb_stdlog);
440 return (scb->ops->write (scb, buf, count));
444 serial_printf (struct serial *desc, const char *format,...)
448 va_start (args, format);
450 buf = xstrvprintf (format, args);
451 serial_write (desc, buf, strlen (buf));
458 serial_drain_output (struct serial *scb)
460 return scb->ops->drain_output (scb);
464 serial_flush_output (struct serial *scb)
466 return scb->ops->flush_output (scb);
470 serial_flush_input (struct serial *scb)
472 return scb->ops->flush_input (scb);
476 serial_send_break (struct serial *scb)
478 if (serial_logfp != NULL)
479 serial_logchar (serial_logfp, 'w', SERIAL_BREAK, 0);
481 return (scb->ops->send_break (scb));
485 serial_raw (struct serial *scb)
487 scb->ops->go_raw (scb);
491 serial_get_tty_state (struct serial *scb)
493 return scb->ops->get_tty_state (scb);
497 serial_copy_tty_state (struct serial *scb, serial_ttystate ttystate)
499 return scb->ops->copy_tty_state (scb, ttystate);
503 serial_set_tty_state (struct serial *scb, serial_ttystate ttystate)
505 return scb->ops->set_tty_state (scb, ttystate);
509 serial_print_tty_state (struct serial *scb,
510 serial_ttystate ttystate,
511 struct ui_file *stream)
513 scb->ops->print_tty_state (scb, ttystate, stream);
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);
531 serial_setparity (struct serial *scb, int parity)
533 return scb->ops->setparity (scb, parity);
537 serial_can_async_p (struct serial *scb)
539 return (scb->ops->async != NULL);
543 serial_is_async_p (struct serial *scb)
545 return (scb->ops->async != NULL) && (scb->async_handler != NULL);
549 serial_async (struct serial *scb,
550 serial_event_ftype *handler,
553 int changed = ((scb->async_handler == NULL) != (handler == NULL));
555 scb->async_handler = handler;
556 scb->async_context = context;
557 /* Only change mode if there is a need. */
559 scb->ops->async (scb, handler != NULL);
563 serial_debug (struct serial *scb, int debug_p)
565 scb->debug_p = debug_p;
569 serial_debug_p (struct serial *scb)
571 return scb->debug_p || global_serial_debug_p;
576 serial_wait_handle (struct serial *scb, HANDLE *read, HANDLE *except)
578 if (scb->ops->wait_handle)
579 scb->ops->wait_handle (scb, read, except);
582 *read = (HANDLE) _get_osfhandle (scb->fd);
588 serial_done_wait_handle (struct serial *scb)
590 if (scb->ops->done_wait_handle)
591 scb->ops->done_wait_handle (scb);
596 serial_pipe (struct serial *scbs[2])
598 const struct serial_ops *ops;
601 ops = serial_interface_lookup ("pipe");
608 if (gdb_pipe (fildes) == -1)
611 scbs[0] = serial_fdopen_ops (fildes[0], ops);
612 scbs[1] = serial_fdopen_ops (fildes[1], ops);
616 /* Serial set/show framework. */
618 static struct cmd_list_element *serial_set_cmdlist;
619 static struct cmd_list_element *serial_show_cmdlist;
622 serial_set_cmd (const char *args, int from_tty)
624 printf_unfiltered ("\"set serial\" must be followed "
625 "by the name of a command.\n");
626 help_list (serial_set_cmdlist, "set serial ", all_commands, gdb_stdout);
630 serial_show_cmd (const char *args, int from_tty)
632 cmd_show_list (serial_show_cmdlist, from_tty, "");
635 /* Baud rate specified for talking to serial target systems. Default
636 is left as -1, so targets can choose their own defaults. */
637 /* FIXME: This means that "show serial baud" and gr_files_info can
638 print -1 or (unsigned int)-1. This is a Bad User Interface. */
643 serial_baud_show_cmd (struct ui_file *file, int from_tty,
644 struct cmd_list_element *c, const char *value)
646 fprintf_filtered (file, _("Baud rate for remote serial I/O is %s.\n"),
650 /* Parity for serial port. */
652 int serial_parity = GDBPARITY_NONE;
654 static const char parity_none[] = "none";
655 static const char parity_odd[] = "odd";
656 static const char parity_even[] = "even";
657 static const char *const parity_enums[] =
658 {parity_none, parity_odd, parity_even, NULL};
659 static const char *parity = parity_none;
661 /* Set serial_parity value. */
664 set_parity (const char *ignore_args, int from_tty, struct cmd_list_element *c)
666 if (parity == parity_odd)
667 serial_parity = GDBPARITY_ODD;
668 else if (parity == parity_even)
669 serial_parity = GDBPARITY_EVEN;
671 serial_parity = GDBPARITY_NONE;
675 _initialize_serial (void)
678 add_com ("connect", class_obscure, connect_command, _("\
679 Connect the terminal directly up to the command monitor.\n\
680 Use <CR>~. or <CR>~^D to break out."));
683 add_prefix_cmd ("serial", class_maintenance, serial_set_cmd, _("\
684 Set default serial/parallel port configuration."),
685 &serial_set_cmdlist, "set serial ",
689 add_prefix_cmd ("serial", class_maintenance, serial_show_cmd, _("\
690 Show default serial/parallel port configuration."),
691 &serial_show_cmdlist, "show serial ",
695 /* If target is open when baud changes, it doesn't take effect until
696 the next open (I think, not sure). */
697 add_setshow_zinteger_cmd ("baud", no_class, &baud_rate, _("\
698 Set baud rate for remote serial I/O."), _("\
699 Show baud rate for remote serial I/O."), _("\
700 This value is used to set the speed of the serial port when debugging\n\
701 using remote targets."),
703 serial_baud_show_cmd,
704 &serial_set_cmdlist, &serial_show_cmdlist);
706 add_setshow_enum_cmd ("parity", no_class, parity_enums,
708 Set parity for remote serial I/O"), _("\
709 Show parity for remote serial I/O"), NULL,
711 NULL, /* FIXME: i18n: */
712 &serial_set_cmdlist, &serial_show_cmdlist);
714 add_setshow_filename_cmd ("remotelogfile", no_class, &serial_logfile, _("\
715 Set filename for remote session recording."), _("\
716 Show filename for remote session recording."), _("\
717 This file is used to record the remote session for future playback\n\
720 NULL, /* FIXME: i18n: */
721 &setlist, &showlist);
723 add_setshow_enum_cmd ("remotelogbase", no_class, logbase_enums,
724 &serial_logbase, _("\
725 Set numerical base for remote session logging"), _("\
726 Show numerical base for remote session logging"), NULL,
728 NULL, /* FIXME: i18n: */
729 &setlist, &showlist);
731 add_setshow_zuinteger_cmd ("serial", class_maintenance,
732 &global_serial_debug_p, _("\
733 Set serial debugging."), _("\
734 Show serial debugging."), _("\
735 When non-zero, serial port debugging is enabled."),
737 NULL, /* FIXME: i18n: */
738 &setdebuglist, &showdebuglist);