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https://sourceware.org/git/binutils-gdb.git
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699 lines
16 KiB
C
699 lines
16 KiB
C
/* Generic serial interface routines
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Copyright (C) 1992-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include <ctype.h>
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#include "serial.h"
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#include "gdbcmd.h"
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#include "cli/cli-utils.h"
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extern void _initialize_serial (void);
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/* Is serial being debugged? */
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static unsigned int global_serial_debug_p;
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typedef const struct serial_ops *serial_ops_p;
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DEF_VEC_P (serial_ops_p);
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/* Serial I/O handlers. */
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VEC (serial_ops_p) *serial_ops_list = NULL;
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/* Pointer to list of scb's. */
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static struct serial *scb_base;
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/* Non-NULL gives filename which contains a recording of the remote session,
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suitable for playback by gdbserver. */
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static char *serial_logfile = NULL;
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static struct ui_file *serial_logfp = NULL;
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static const struct serial_ops *serial_interface_lookup (const char *);
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static void serial_logchar (struct ui_file *stream,
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int ch_type, int ch, int timeout);
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static const char logbase_hex[] = "hex";
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static const char logbase_octal[] = "octal";
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static const char logbase_ascii[] = "ascii";
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static const char *const logbase_enums[] =
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{logbase_hex, logbase_octal, logbase_ascii, NULL};
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static const char *serial_logbase = logbase_ascii;
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static int serial_current_type = 0;
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/* Log char CH of type CHTYPE, with TIMEOUT. */
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/* Define bogus char to represent a BREAK. Should be careful to choose a value
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that can't be confused with a normal char, or an error code. */
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#define SERIAL_BREAK 1235
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static void
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serial_logchar (struct ui_file *stream, int ch_type, int ch, int timeout)
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{
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if (ch_type != serial_current_type)
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{
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fprintf_unfiltered (stream, "\n%c ", ch_type);
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serial_current_type = ch_type;
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}
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if (serial_logbase != logbase_ascii)
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fputc_unfiltered (' ', stream);
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switch (ch)
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{
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case SERIAL_TIMEOUT:
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fprintf_unfiltered (stream, "<Timeout: %d seconds>", timeout);
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return;
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case SERIAL_ERROR:
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fprintf_unfiltered (stream, "<Error: %s>", safe_strerror (errno));
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return;
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case SERIAL_EOF:
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fputs_unfiltered ("<Eof>", stream);
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return;
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case SERIAL_BREAK:
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fputs_unfiltered ("<Break>", stream);
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return;
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default:
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if (serial_logbase == logbase_hex)
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fprintf_unfiltered (stream, "%02x", ch & 0xff);
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else if (serial_logbase == logbase_octal)
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fprintf_unfiltered (stream, "%03o", ch & 0xff);
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else
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switch (ch)
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{
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case '\\':
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fputs_unfiltered ("\\\\", stream);
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break;
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case '\b':
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fputs_unfiltered ("\\b", stream);
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break;
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case '\f':
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fputs_unfiltered ("\\f", stream);
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break;
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case '\n':
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fputs_unfiltered ("\\n", stream);
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break;
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case '\r':
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fputs_unfiltered ("\\r", stream);
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break;
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case '\t':
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fputs_unfiltered ("\\t", stream);
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break;
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case '\v':
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fputs_unfiltered ("\\v", stream);
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break;
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default:
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fprintf_unfiltered (stream,
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isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF);
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break;
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}
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}
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}
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void
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serial_log_command (struct target_ops *self, const char *cmd)
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{
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if (!serial_logfp)
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return;
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serial_current_type = 'c';
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fputs_unfiltered ("\nc ", serial_logfp);
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fputs_unfiltered (cmd, serial_logfp);
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/* Make sure that the log file is as up-to-date as possible,
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in case we are getting ready to dump core or something. */
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gdb_flush (serial_logfp);
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}
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static const struct serial_ops *
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serial_interface_lookup (const char *name)
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{
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const struct serial_ops *ops;
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int i;
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for (i = 0; VEC_iterate (serial_ops_p, serial_ops_list, i, ops); ++i)
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if (strcmp (name, ops->name) == 0)
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return ops;
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return NULL;
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}
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void
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serial_add_interface (const struct serial_ops *optable)
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{
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VEC_safe_push (serial_ops_p, serial_ops_list, optable);
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}
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/* Return the open serial device for FD, if found, or NULL if FD is
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not already opened. */
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struct serial *
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serial_for_fd (int fd)
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{
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struct serial *scb;
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for (scb = scb_base; scb; scb = scb->next)
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if (scb->fd == fd)
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return scb;
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return NULL;
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}
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/* Open up a device or a network socket, depending upon the syntax of NAME. */
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struct serial *
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serial_open (const char *name)
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{
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struct serial *scb;
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const struct serial_ops *ops;
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const char *open_name = name;
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if (strcmp (name, "pc") == 0)
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ops = serial_interface_lookup ("pc");
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else if (strncmp (name, "lpt", 3) == 0)
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ops = serial_interface_lookup ("parallel");
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else if (strncmp (name, "|", 1) == 0)
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{
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ops = serial_interface_lookup ("pipe");
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/* Discard ``|'' and any space before the command itself. */
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++open_name;
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open_name = skip_spaces_const (open_name);
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}
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/* Check for a colon, suggesting an IP address/port pair.
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Do this *after* checking for all the interesting prefixes. We
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don't want to constrain the syntax of what can follow them. */
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else if (strchr (name, ':'))
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ops = serial_interface_lookup ("tcp");
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else
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ops = serial_interface_lookup ("hardwire");
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if (!ops)
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return NULL;
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scb = XNEW (struct serial);
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scb->ops = ops;
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scb->bufcnt = 0;
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scb->bufp = scb->buf;
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scb->error_fd = -1;
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scb->refcnt = 1;
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/* `...->open (...)' would get expanded by the open(2) syscall macro. */
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if ((*scb->ops->open) (scb, open_name))
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{
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xfree (scb);
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return NULL;
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}
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scb->name = xstrdup (name);
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scb->next = scb_base;
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scb->debug_p = 0;
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scb->async_state = 0;
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scb->async_handler = NULL;
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scb->async_context = NULL;
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scb_base = scb;
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if (serial_logfile != NULL)
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{
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serial_logfp = gdb_fopen (serial_logfile, "w");
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if (serial_logfp == NULL)
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perror_with_name (serial_logfile);
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}
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return scb;
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}
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/* Open a new serial stream using a file handle, using serial
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interface ops OPS. */
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static struct serial *
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serial_fdopen_ops (const int fd, const struct serial_ops *ops)
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{
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struct serial *scb;
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if (!ops)
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{
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ops = serial_interface_lookup ("terminal");
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if (!ops)
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ops = serial_interface_lookup ("hardwire");
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}
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if (!ops)
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return NULL;
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scb = XCNEW (struct serial);
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scb->ops = ops;
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scb->bufcnt = 0;
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scb->bufp = scb->buf;
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scb->error_fd = -1;
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scb->refcnt = 1;
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scb->name = NULL;
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scb->next = scb_base;
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scb->debug_p = 0;
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scb->async_state = 0;
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scb->async_handler = NULL;
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scb->async_context = NULL;
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scb_base = scb;
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if ((ops->fdopen) != NULL)
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(*ops->fdopen) (scb, fd);
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else
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scb->fd = fd;
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return scb;
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}
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struct serial *
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serial_fdopen (const int fd)
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{
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return serial_fdopen_ops (fd, NULL);
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}
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static void
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do_serial_close (struct serial *scb, int really_close)
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{
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struct serial *tmp_scb;
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if (serial_logfp)
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{
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fputs_unfiltered ("\nEnd of log\n", serial_logfp);
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serial_current_type = 0;
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/* XXX - What if serial_logfp == gdb_stdout or gdb_stderr? */
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ui_file_delete (serial_logfp);
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serial_logfp = NULL;
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}
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/* ensure that the FD has been taken out of async mode. */
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if (scb->async_handler != NULL)
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serial_async (scb, NULL, NULL);
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if (really_close)
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scb->ops->close (scb);
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if (scb->name)
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xfree (scb->name);
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/* For serial_is_open. */
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scb->bufp = NULL;
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if (scb_base == scb)
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scb_base = scb_base->next;
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else
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for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
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{
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if (tmp_scb->next != scb)
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continue;
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tmp_scb->next = tmp_scb->next->next;
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break;
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}
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serial_unref (scb);
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}
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void
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serial_close (struct serial *scb)
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{
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do_serial_close (scb, 1);
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}
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void
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serial_un_fdopen (struct serial *scb)
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{
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do_serial_close (scb, 0);
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}
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int
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serial_is_open (struct serial *scb)
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{
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return scb->bufp != NULL;
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}
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void
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serial_ref (struct serial *scb)
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{
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scb->refcnt++;
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}
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void
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serial_unref (struct serial *scb)
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{
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--scb->refcnt;
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if (scb->refcnt == 0)
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xfree (scb);
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}
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int
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serial_readchar (struct serial *scb, int timeout)
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{
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int ch;
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/* FIXME: cagney/1999-10-11: Don't enable this check until the ASYNC
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code is finished. */
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if (0 && serial_is_async_p (scb) && timeout < 0)
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internal_error (__FILE__, __LINE__,
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_("serial_readchar: blocking read in async mode"));
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ch = scb->ops->readchar (scb, timeout);
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if (serial_logfp != NULL)
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{
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serial_logchar (serial_logfp, 'r', ch, timeout);
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/* Make sure that the log file is as up-to-date as possible,
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in case we are getting ready to dump core or something. */
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gdb_flush (serial_logfp);
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}
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if (serial_debug_p (scb))
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{
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fprintf_unfiltered (gdb_stdlog, "[");
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serial_logchar (gdb_stdlog, 'r', ch, timeout);
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fprintf_unfiltered (gdb_stdlog, "]");
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gdb_flush (gdb_stdlog);
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}
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return (ch);
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}
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int
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serial_write (struct serial *scb, const void *buf, size_t count)
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{
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if (serial_logfp != NULL)
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{
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const char *str = buf;
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size_t c;
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for (c = 0; c < count; c++)
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serial_logchar (serial_logfp, 'w', str[c] & 0xff, 0);
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/* Make sure that the log file is as up-to-date as possible,
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in case we are getting ready to dump core or something. */
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gdb_flush (serial_logfp);
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}
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if (serial_debug_p (scb))
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{
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const char *str = buf;
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size_t c;
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for (c = 0; c < count; c++)
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{
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fprintf_unfiltered (gdb_stdlog, "[");
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serial_logchar (gdb_stdlog, 'w', str[c] & 0xff, 0);
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fprintf_unfiltered (gdb_stdlog, "]");
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}
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gdb_flush (gdb_stdlog);
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}
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return (scb->ops->write (scb, buf, count));
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}
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void
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serial_printf (struct serial *desc, const char *format,...)
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{
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va_list args;
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char *buf;
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va_start (args, format);
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buf = xstrvprintf (format, args);
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serial_write (desc, buf, strlen (buf));
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xfree (buf);
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va_end (args);
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}
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int
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serial_drain_output (struct serial *scb)
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{
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return scb->ops->drain_output (scb);
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}
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int
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serial_flush_output (struct serial *scb)
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{
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return scb->ops->flush_output (scb);
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}
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int
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serial_flush_input (struct serial *scb)
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{
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return scb->ops->flush_input (scb);
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}
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int
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serial_send_break (struct serial *scb)
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{
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if (serial_logfp != NULL)
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serial_logchar (serial_logfp, 'w', SERIAL_BREAK, 0);
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return (scb->ops->send_break (scb));
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}
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void
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serial_raw (struct serial *scb)
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{
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scb->ops->go_raw (scb);
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}
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serial_ttystate
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serial_get_tty_state (struct serial *scb)
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{
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return scb->ops->get_tty_state (scb);
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}
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serial_ttystate
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serial_copy_tty_state (struct serial *scb, serial_ttystate ttystate)
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{
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return scb->ops->copy_tty_state (scb, ttystate);
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}
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int
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serial_set_tty_state (struct serial *scb, serial_ttystate ttystate)
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{
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return scb->ops->set_tty_state (scb, ttystate);
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}
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void
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serial_print_tty_state (struct serial *scb,
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serial_ttystate ttystate,
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struct ui_file *stream)
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{
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scb->ops->print_tty_state (scb, ttystate, stream);
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}
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int
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serial_noflush_set_tty_state (struct serial *scb,
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serial_ttystate new_ttystate,
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serial_ttystate old_ttystate)
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{
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return scb->ops->noflush_set_tty_state (scb, new_ttystate, old_ttystate);
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}
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int
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serial_setbaudrate (struct serial *scb, int rate)
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{
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return scb->ops->setbaudrate (scb, rate);
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}
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int
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serial_setstopbits (struct serial *scb, int num)
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{
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return scb->ops->setstopbits (scb, num);
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}
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int
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serial_can_async_p (struct serial *scb)
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{
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return (scb->ops->async != NULL);
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}
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int
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serial_is_async_p (struct serial *scb)
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{
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return (scb->ops->async != NULL) && (scb->async_handler != NULL);
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}
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void
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serial_async (struct serial *scb,
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serial_event_ftype *handler,
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void *context)
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{
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int changed = ((scb->async_handler == NULL) != (handler == NULL));
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scb->async_handler = handler;
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scb->async_context = context;
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/* Only change mode if there is a need. */
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if (changed)
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scb->ops->async (scb, handler != NULL);
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}
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void
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serial_debug (struct serial *scb, int debug_p)
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{
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scb->debug_p = debug_p;
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}
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int
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serial_debug_p (struct serial *scb)
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{
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return scb->debug_p || global_serial_debug_p;
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}
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#ifdef USE_WIN32API
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void
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serial_wait_handle (struct serial *scb, HANDLE *read, HANDLE *except)
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{
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if (scb->ops->wait_handle)
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scb->ops->wait_handle (scb, read, except);
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else
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{
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*read = (HANDLE) _get_osfhandle (scb->fd);
|
||
*except = NULL;
|
||
}
|
||
}
|
||
|
||
void
|
||
serial_done_wait_handle (struct serial *scb)
|
||
{
|
||
if (scb->ops->done_wait_handle)
|
||
scb->ops->done_wait_handle (scb);
|
||
}
|
||
#endif
|
||
|
||
int
|
||
serial_pipe (struct serial *scbs[2])
|
||
{
|
||
const struct serial_ops *ops;
|
||
int fildes[2];
|
||
|
||
ops = serial_interface_lookup ("pipe");
|
||
if (!ops)
|
||
{
|
||
errno = ENOSYS;
|
||
return -1;
|
||
}
|
||
|
||
if (gdb_pipe (fildes) == -1)
|
||
return -1;
|
||
|
||
scbs[0] = serial_fdopen_ops (fildes[0], ops);
|
||
scbs[1] = serial_fdopen_ops (fildes[1], ops);
|
||
return 0;
|
||
}
|
||
|
||
/* Serial set/show framework. */
|
||
|
||
static struct cmd_list_element *serial_set_cmdlist;
|
||
static struct cmd_list_element *serial_show_cmdlist;
|
||
|
||
static void
|
||
serial_set_cmd (char *args, int from_tty)
|
||
{
|
||
printf_unfiltered ("\"set serial\" must be followed "
|
||
"by the name of a command.\n");
|
||
help_list (serial_set_cmdlist, "set serial ", all_commands, gdb_stdout);
|
||
}
|
||
|
||
static void
|
||
serial_show_cmd (char *args, int from_tty)
|
||
{
|
||
cmd_show_list (serial_show_cmdlist, from_tty, "");
|
||
}
|
||
|
||
/* Baud rate specified for talking to serial target systems. Default
|
||
is left as -1, so targets can choose their own defaults. */
|
||
/* FIXME: This means that "show serial baud" and gr_files_info can
|
||
print -1 or (unsigned int)-1. This is a Bad User Interface. */
|
||
|
||
int baud_rate = -1;
|
||
|
||
static void
|
||
serial_baud_show_cmd (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Baud rate for remote serial I/O is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
void
|
||
_initialize_serial (void)
|
||
{
|
||
#if 0
|
||
add_com ("connect", class_obscure, connect_command, _("\
|
||
Connect the terminal directly up to the command monitor.\n\
|
||
Use <CR>~. or <CR>~^D to break out."));
|
||
#endif /* 0 */
|
||
|
||
add_prefix_cmd ("serial", class_maintenance, serial_set_cmd, _("\
|
||
Set default serial/parallel port configuration."),
|
||
&serial_set_cmdlist, "set serial ",
|
||
0/*allow-unknown*/,
|
||
&setlist);
|
||
|
||
add_prefix_cmd ("serial", class_maintenance, serial_show_cmd, _("\
|
||
Show default serial/parallel port configuration."),
|
||
&serial_show_cmdlist, "show serial ",
|
||
0/*allow-unknown*/,
|
||
&showlist);
|
||
|
||
/* If target is open when baud changes, it doesn't take effect until
|
||
the next open (I think, not sure). */
|
||
add_setshow_zinteger_cmd ("baud", no_class, &baud_rate, _("\
|
||
Set baud rate for remote serial I/O."), _("\
|
||
Show baud rate for remote serial I/O."), _("\
|
||
This value is used to set the speed of the serial port when debugging\n\
|
||
using remote targets."),
|
||
NULL,
|
||
serial_baud_show_cmd,
|
||
&serial_set_cmdlist, &serial_show_cmdlist);
|
||
|
||
add_setshow_filename_cmd ("remotelogfile", no_class, &serial_logfile, _("\
|
||
Set filename for remote session recording."), _("\
|
||
Show filename for remote session recording."), _("\
|
||
This file is used to record the remote session for future playback\n\
|
||
by gdbserver."),
|
||
NULL,
|
||
NULL, /* FIXME: i18n: */
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_enum_cmd ("remotelogbase", no_class, logbase_enums,
|
||
&serial_logbase, _("\
|
||
Set numerical base for remote session logging"), _("\
|
||
Show numerical base for remote session logging"), NULL,
|
||
NULL,
|
||
NULL, /* FIXME: i18n: */
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_zuinteger_cmd ("serial", class_maintenance,
|
||
&global_serial_debug_p, _("\
|
||
Set serial debugging."), _("\
|
||
Show serial debugging."), _("\
|
||
When non-zero, serial port debugging is enabled."),
|
||
NULL,
|
||
NULL, /* FIXME: i18n: */
|
||
&setdebuglist, &showdebuglist);
|
||
}
|