1 /* Generic serial interface routines
3 Copyright (C) 1992-2018 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 /* Serial I/O handlers. */
32 static std::vector<const struct serial_ops *> serial_ops_list;
34 /* Pointer to list of scb's. */
36 static struct serial *scb_base;
38 /* Non-NULL gives filename which contains a recording of the remote session,
39 suitable for playback by gdbserver. */
41 static char *serial_logfile = NULL;
42 static struct ui_file *serial_logfp = NULL;
44 static const struct serial_ops *serial_interface_lookup (const char *);
45 static void serial_logchar (struct ui_file *stream,
46 int ch_type, int ch, int timeout);
47 static const char logbase_hex[] = "hex";
48 static const char logbase_octal[] = "octal";
49 static const char logbase_ascii[] = "ascii";
50 static const char *const logbase_enums[] =
51 {logbase_hex, logbase_octal, logbase_ascii, NULL};
52 static const char *serial_logbase = logbase_ascii;
55 static int serial_current_type = 0;
57 /* Log char CH of type CHTYPE, with TIMEOUT. */
59 /* Define bogus char to represent a BREAK. Should be careful to choose a value
60 that can't be confused with a normal char, or an error code. */
61 #define SERIAL_BREAK 1235
64 serial_logchar (struct ui_file *stream, int ch_type, int ch, int timeout)
66 if (ch_type != serial_current_type)
68 fprintf_unfiltered (stream, "\n%c ", ch_type);
69 serial_current_type = ch_type;
72 if (serial_logbase != logbase_ascii)
73 fputc_unfiltered (' ', stream);
78 fprintf_unfiltered (stream, "<Timeout: %d seconds>", timeout);
81 fprintf_unfiltered (stream, "<Error: %s>", safe_strerror (errno));
84 fputs_unfiltered ("<Eof>", stream);
87 fputs_unfiltered ("<Break>", stream);
90 if (serial_logbase == logbase_hex)
91 fprintf_unfiltered (stream, "%02x", ch & 0xff);
92 else if (serial_logbase == logbase_octal)
93 fprintf_unfiltered (stream, "%03o", ch & 0xff);
98 fputs_unfiltered ("\\\\", stream);
101 fputs_unfiltered ("\\b", stream);
104 fputs_unfiltered ("\\f", stream);
107 fputs_unfiltered ("\\n", stream);
110 fputs_unfiltered ("\\r", stream);
113 fputs_unfiltered ("\\t", stream);
116 fputs_unfiltered ("\\v", stream);
119 fprintf_unfiltered (stream,
120 isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF);
127 serial_log_command (struct target_ops *self, const char *cmd)
132 serial_current_type = 'c';
134 fputs_unfiltered ("\nc ", serial_logfp);
135 fputs_unfiltered (cmd, serial_logfp);
137 /* Make sure that the log file is as up-to-date as possible,
138 in case we are getting ready to dump core or something. */
139 gdb_flush (serial_logfp);
143 static const struct serial_ops *
144 serial_interface_lookup (const char *name)
146 for (const struct serial_ops *ops : serial_ops_list)
147 if (strcmp (name, ops->name) == 0)
154 serial_add_interface (const struct serial_ops *optable)
156 serial_ops_list.push_back (optable);
159 /* Return the open serial device for FD, if found, or NULL if FD is
160 not already opened. */
163 serial_for_fd (int fd)
167 for (scb = scb_base; scb; scb = scb->next)
174 /* Create a new serial for OPS. */
176 static struct serial *
177 new_serial (const struct serial_ops *ops)
181 scb = XCNEW (struct serial);
185 scb->bufp = scb->buf;
192 static struct serial *serial_open_ops_1 (const struct serial_ops *ops,
193 const char *open_name);
195 /* Open up a device or a network socket, depending upon the syntax of NAME. */
198 serial_open (const char *name)
200 const struct serial_ops *ops;
201 const char *open_name = name;
203 if (startswith (name, "|"))
205 ops = serial_interface_lookup ("pipe");
206 /* Discard ``|'' and any space before the command itself. */
208 open_name = skip_spaces (open_name);
210 /* Check for a colon, suggesting an IP address/port pair.
211 Do this *after* checking for all the interesting prefixes. We
212 don't want to constrain the syntax of what can follow them. */
213 else if (strchr (name, ':'))
214 ops = serial_interface_lookup ("tcp");
216 ops = serial_interface_lookup ("hardwire");
221 return serial_open_ops_1 (ops, open_name);
224 /* Open up a serial for OPS, passing OPEN_NAME to the open method. */
226 static struct serial *
227 serial_open_ops_1 (const struct serial_ops *ops, const char *open_name)
231 scb = new_serial (ops);
233 /* `...->open (...)' would get expanded by the open(2) syscall macro. */
234 if ((*scb->ops->open) (scb, open_name))
240 scb->next = scb_base;
243 if (serial_logfile != NULL)
245 stdio_file_up file (new stdio_file ());
247 if (!file->open (serial_logfile, "w"))
248 perror_with_name (serial_logfile);
250 serial_logfp = file.release ();
259 serial_open_ops (const struct serial_ops *ops)
261 return serial_open_ops_1 (ops, NULL);
264 /* Open a new serial stream using a file handle, using serial
265 interface ops OPS. */
267 static struct serial *
268 serial_fdopen_ops (const int fd, const struct serial_ops *ops)
274 ops = serial_interface_lookup ("terminal");
276 ops = serial_interface_lookup ("hardwire");
282 scb = new_serial (ops);
284 scb->next = scb_base;
287 if ((ops->fdopen) != NULL)
288 (*ops->fdopen) (scb, fd);
296 serial_fdopen (const int fd)
298 return serial_fdopen_ops (fd, NULL);
302 do_serial_close (struct serial *scb, int really_close)
304 struct serial *tmp_scb;
308 fputs_unfiltered ("\nEnd of log\n", serial_logfp);
309 serial_current_type = 0;
311 /* XXX - What if serial_logfp == gdb_stdout or gdb_stderr? */
316 /* ensure that the FD has been taken out of async mode. */
317 if (scb->async_handler != NULL)
318 serial_async (scb, NULL, NULL);
321 scb->ops->close (scb);
323 /* For serial_is_open. */
327 scb_base = scb_base->next;
329 for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
331 if (tmp_scb->next != scb)
334 tmp_scb->next = tmp_scb->next->next;
342 serial_close (struct serial *scb)
344 do_serial_close (scb, 1);
348 serial_un_fdopen (struct serial *scb)
350 do_serial_close (scb, 0);
354 serial_is_open (struct serial *scb)
356 return scb->bufp != NULL;
360 serial_ref (struct serial *scb)
366 serial_unref (struct serial *scb)
369 if (scb->refcnt == 0)
374 serial_readchar (struct serial *scb, int timeout)
378 /* FIXME: cagney/1999-10-11: Don't enable this check until the ASYNC
380 if (0 && serial_is_async_p (scb) && timeout < 0)
381 internal_error (__FILE__, __LINE__,
382 _("serial_readchar: blocking read in async mode"));
384 ch = scb->ops->readchar (scb, timeout);
385 if (serial_logfp != NULL)
387 serial_logchar (serial_logfp, 'r', ch, timeout);
389 /* Make sure that the log file is as up-to-date as possible,
390 in case we are getting ready to dump core or something. */
391 gdb_flush (serial_logfp);
393 if (serial_debug_p (scb))
395 fprintf_unfiltered (gdb_stdlog, "[");
396 serial_logchar (gdb_stdlog, 'r', ch, timeout);
397 fprintf_unfiltered (gdb_stdlog, "]");
398 gdb_flush (gdb_stdlog);
405 serial_write (struct serial *scb, const void *buf, size_t count)
407 if (serial_logfp != NULL)
409 const char *str = (const char *) buf;
412 for (c = 0; c < count; c++)
413 serial_logchar (serial_logfp, 'w', str[c] & 0xff, 0);
415 /* Make sure that the log file is as up-to-date as possible,
416 in case we are getting ready to dump core or something. */
417 gdb_flush (serial_logfp);
419 if (serial_debug_p (scb))
421 const char *str = (const char *) buf;
424 for (c = 0; c < count; c++)
426 fprintf_unfiltered (gdb_stdlog, "[");
427 serial_logchar (gdb_stdlog, 'w', str[c] & 0xff, 0);
428 fprintf_unfiltered (gdb_stdlog, "]");
430 gdb_flush (gdb_stdlog);
433 return (scb->ops->write (scb, buf, count));
437 serial_printf (struct serial *desc, const char *format,...)
441 va_start (args, format);
443 buf = xstrvprintf (format, args);
444 serial_write (desc, buf, strlen (buf));
451 serial_drain_output (struct serial *scb)
453 return scb->ops->drain_output (scb);
457 serial_flush_output (struct serial *scb)
459 return scb->ops->flush_output (scb);
463 serial_flush_input (struct serial *scb)
465 return scb->ops->flush_input (scb);
469 serial_send_break (struct serial *scb)
471 if (serial_logfp != NULL)
472 serial_logchar (serial_logfp, 'w', SERIAL_BREAK, 0);
474 return (scb->ops->send_break (scb));
478 serial_raw (struct serial *scb)
480 scb->ops->go_raw (scb);
484 serial_get_tty_state (struct serial *scb)
486 return scb->ops->get_tty_state (scb);
490 serial_copy_tty_state (struct serial *scb, serial_ttystate ttystate)
492 return scb->ops->copy_tty_state (scb, ttystate);
496 serial_set_tty_state (struct serial *scb, serial_ttystate ttystate)
498 return scb->ops->set_tty_state (scb, ttystate);
502 serial_print_tty_state (struct serial *scb,
503 serial_ttystate ttystate,
504 struct ui_file *stream)
506 scb->ops->print_tty_state (scb, ttystate, stream);
510 serial_setbaudrate (struct serial *scb, int rate)
512 return scb->ops->setbaudrate (scb, rate);
516 serial_setstopbits (struct serial *scb, int num)
518 return scb->ops->setstopbits (scb, num);
524 serial_setparity (struct serial *scb, int parity)
526 return scb->ops->setparity (scb, parity);
530 serial_can_async_p (struct serial *scb)
532 return (scb->ops->async != NULL);
536 serial_is_async_p (struct serial *scb)
538 return (scb->ops->async != NULL) && (scb->async_handler != NULL);
542 serial_async (struct serial *scb,
543 serial_event_ftype *handler,
546 int changed = ((scb->async_handler == NULL) != (handler == NULL));
548 scb->async_handler = handler;
549 scb->async_context = context;
550 /* Only change mode if there is a need. */
552 scb->ops->async (scb, handler != NULL);
556 serial_debug (struct serial *scb, int debug_p)
558 scb->debug_p = debug_p;
562 serial_debug_p (struct serial *scb)
564 return scb->debug_p || global_serial_debug_p;
569 serial_wait_handle (struct serial *scb, HANDLE *read, HANDLE *except)
571 if (scb->ops->wait_handle)
572 scb->ops->wait_handle (scb, read, except);
575 *read = (HANDLE) _get_osfhandle (scb->fd);
581 serial_done_wait_handle (struct serial *scb)
583 if (scb->ops->done_wait_handle)
584 scb->ops->done_wait_handle (scb);
589 serial_pipe (struct serial *scbs[2])
591 const struct serial_ops *ops;
594 ops = serial_interface_lookup ("pipe");
601 if (gdb_pipe (fildes) == -1)
604 scbs[0] = serial_fdopen_ops (fildes[0], ops);
605 scbs[1] = serial_fdopen_ops (fildes[1], ops);
609 /* Serial set/show framework. */
611 static struct cmd_list_element *serial_set_cmdlist;
612 static struct cmd_list_element *serial_show_cmdlist;
615 serial_set_cmd (const char *args, int from_tty)
617 printf_unfiltered ("\"set serial\" must be followed "
618 "by the name of a command.\n");
619 help_list (serial_set_cmdlist, "set serial ", all_commands, gdb_stdout);
623 serial_show_cmd (const char *args, int from_tty)
625 cmd_show_list (serial_show_cmdlist, from_tty, "");
628 /* Baud rate specified for talking to serial target systems. Default
629 is left as -1, so targets can choose their own defaults. */
630 /* FIXME: This means that "show serial baud" and gr_files_info can
631 print -1 or (unsigned int)-1. This is a Bad User Interface. */
636 serial_baud_show_cmd (struct ui_file *file, int from_tty,
637 struct cmd_list_element *c, const char *value)
639 fprintf_filtered (file, _("Baud rate for remote serial I/O is %s.\n"),
643 /* Parity for serial port. */
645 int serial_parity = GDBPARITY_NONE;
647 static const char parity_none[] = "none";
648 static const char parity_odd[] = "odd";
649 static const char parity_even[] = "even";
650 static const char *const parity_enums[] =
651 {parity_none, parity_odd, parity_even, NULL};
652 static const char *parity = parity_none;
654 /* Set serial_parity value. */
657 set_parity (const char *ignore_args, int from_tty, struct cmd_list_element *c)
659 if (parity == parity_odd)
660 serial_parity = GDBPARITY_ODD;
661 else if (parity == parity_even)
662 serial_parity = GDBPARITY_EVEN;
664 serial_parity = GDBPARITY_NONE;
668 _initialize_serial (void)
671 add_com ("connect", class_obscure, connect_command, _("\
672 Connect the terminal directly up to the command monitor.\n\
673 Use <CR>~. or <CR>~^D to break out."));
676 add_prefix_cmd ("serial", class_maintenance, serial_set_cmd, _("\
677 Set default serial/parallel port configuration."),
678 &serial_set_cmdlist, "set serial ",
682 add_prefix_cmd ("serial", class_maintenance, serial_show_cmd, _("\
683 Show default serial/parallel port configuration."),
684 &serial_show_cmdlist, "show serial ",
688 /* If target is open when baud changes, it doesn't take effect until
689 the next open (I think, not sure). */
690 add_setshow_zinteger_cmd ("baud", no_class, &baud_rate, _("\
691 Set baud rate for remote serial I/O."), _("\
692 Show baud rate for remote serial I/O."), _("\
693 This value is used to set the speed of the serial port when debugging\n\
694 using remote targets."),
696 serial_baud_show_cmd,
697 &serial_set_cmdlist, &serial_show_cmdlist);
699 add_setshow_enum_cmd ("parity", no_class, parity_enums,
701 Set parity for remote serial I/O"), _("\
702 Show parity for remote serial I/O"), NULL,
704 NULL, /* FIXME: i18n: */
705 &serial_set_cmdlist, &serial_show_cmdlist);
707 add_setshow_filename_cmd ("remotelogfile", no_class, &serial_logfile, _("\
708 Set filename for remote session recording."), _("\
709 Show filename for remote session recording."), _("\
710 This file is used to record the remote session for future playback\n\
713 NULL, /* FIXME: i18n: */
714 &setlist, &showlist);
716 add_setshow_enum_cmd ("remotelogbase", no_class, logbase_enums,
717 &serial_logbase, _("\
718 Set numerical base for remote session logging"), _("\
719 Show numerical base for remote session logging"), NULL,
721 NULL, /* FIXME: i18n: */
722 &setlist, &showlist);
724 add_setshow_zuinteger_cmd ("serial", class_maintenance,
725 &global_serial_debug_p, _("\
726 Set serial debugging."), _("\
727 Show serial debugging."), _("\
728 When non-zero, serial port debugging is enabled."),
730 NULL, /* FIXME: i18n: */
731 &setdebuglist, &showdebuglist);