0694bce619
* win32.c: New file; support for debugging on windows NT. * configure.in: (i[345]86-*-win32): New target. * configure: Regnerated. * eval.c (evaluate_subexp_standard): Remove unused name. * serial.c (gdb_string.h): Include. * source.c (value.h): Include. * config/i386/i386win32.mh (XDEPFILES): Add win32.o * config/i386/i386win32.mt: New. * config/i386/tm-i386win32.h: New.
319 lines
6.2 KiB
C
319 lines
6.2 KiB
C
/* Generic serial interface routines
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Copyright 1992, 1993 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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "serial.h"
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#include "gdb_string.h"
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/* Linked list of serial I/O handlers */
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static struct serial_ops *serial_ops_list = NULL;
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/* This is the last serial stream opened. Used by connect command. */
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static serial_t last_serial_opened = NULL;
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/* Pointer to list of scb's. */
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static serial_t scb_base;
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static struct serial_ops *
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serial_interface_lookup (name)
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char *name;
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{
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struct serial_ops *ops;
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for (ops = serial_ops_list; ops; ops = ops->next)
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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(optable)
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struct serial_ops *optable;
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{
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optable->next = serial_ops_list;
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serial_ops_list = optable;
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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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serial_t
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serial_open (name)
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const char *name;
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{
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serial_t scb;
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struct serial_ops *ops;
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for (scb = scb_base; scb; scb = scb->next)
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if (scb->name && strcmp (scb->name, name) == 0)
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{
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scb->refcnt++;
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return scb;
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}
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if (strcmp (name, "pc") == 0)
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ops = serial_interface_lookup ("pc");
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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 = (serial_t)xmalloc (sizeof (struct _serial_t));
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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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if (scb->ops->open(scb, name))
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{
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free (scb);
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return NULL;
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}
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scb->name = strsave (name);
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scb->next = scb_base;
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scb->refcnt = 1;
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scb_base = scb;
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last_serial_opened = scb;
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return scb;
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}
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serial_t
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serial_fdopen (fd)
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const int fd;
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{
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serial_t scb;
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struct serial_ops *ops;
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for (scb = scb_base; scb; scb = scb->next)
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if (scb->fd == fd)
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{
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scb->refcnt++;
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return scb;
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}
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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 = (serial_t)xmalloc (sizeof (struct _serial_t));
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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->fd = fd;
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scb->name = NULL;
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scb->next = scb_base;
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scb->refcnt = 1;
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scb_base = scb;
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last_serial_opened = scb;
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return scb;
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}
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void
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serial_close(scb, really_close)
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serial_t scb;
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int really_close;
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{
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serial_t tmp_scb;
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last_serial_opened = NULL;
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/* This is bogus. It's not our fault if you pass us a bad scb...! Rob, you
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should fix your code instead. */
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if (!scb)
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return;
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scb->refcnt--;
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if (scb->refcnt > 0)
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return;
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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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free (scb->name);
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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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free(scb);
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}
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#if 0
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/*
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The connect command is #if 0 because I hadn't thought of an elegant
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way to wait for I/O on two serial_t's simultaneously. Two solutions
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came to mind:
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1) Fork, and have have one fork handle the to user direction,
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and have the other hand the to target direction. This
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obviously won't cut it for MSDOS.
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2) Use something like select. This assumes that stdin and
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the target side can both be waited on via the same
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mechanism. This may not be true for DOS, if GDB is
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talking to the target via a TCP socket.
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-grossman, 8 Jun 93
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*/
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/* Connect the user directly to the remote system. This command acts just like
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the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
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static serial_t tty_desc; /* Controlling terminal */
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static void
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cleanup_tty(ttystate)
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serial_ttystate ttystate;
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{
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printf_unfiltered ("\r\n[Exiting connect mode]\r\n");
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SERIAL_SET_TTY_STATE (tty_desc, ttystate);
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free (ttystate);
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SERIAL_CLOSE (tty_desc);
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}
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static void
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connect_command (args, fromtty)
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char *args;
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int fromtty;
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{
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int c;
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char cur_esc = 0;
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serial_ttystate ttystate;
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serial_t port_desc; /* TTY port */
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dont_repeat();
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if (args)
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fprintf_unfiltered(gdb_stderr, "This command takes no args. They have been ignored.\n");
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printf_unfiltered("[Entering connect mode. Use ~. or ~^D to escape]\n");
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tty_desc = SERIAL_FDOPEN (0);
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port_desc = last_serial_opened;
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ttystate = SERIAL_GET_TTY_STATE (tty_desc);
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SERIAL_RAW (tty_desc);
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SERIAL_RAW (port_desc);
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make_cleanup (cleanup_tty, ttystate);
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while (1)
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{
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int mask;
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mask = SERIAL_WAIT_2 (tty_desc, port_desc, -1);
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if (mask & 2)
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{ /* tty input */
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char cx;
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while (1)
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{
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c = SERIAL_READCHAR(tty_desc, 0);
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if (c == SERIAL_TIMEOUT)
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break;
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if (c < 0)
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perror_with_name("connect");
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cx = c;
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SERIAL_WRITE(port_desc, &cx, 1);
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switch (cur_esc)
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{
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case 0:
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if (c == '\r')
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cur_esc = c;
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break;
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case '\r':
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if (c == '~')
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cur_esc = c;
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else
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cur_esc = 0;
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break;
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case '~':
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if (c == '.' || c == '\004')
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return;
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else
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cur_esc = 0;
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}
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}
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}
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if (mask & 1)
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{ /* Port input */
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char cx;
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while (1)
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{
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c = SERIAL_READCHAR(port_desc, 0);
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if (c == SERIAL_TIMEOUT)
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break;
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if (c < 0)
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perror_with_name("connect");
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cx = c;
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SERIAL_WRITE(tty_desc, &cx, 1);
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}
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}
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}
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}
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#endif /* 0 */
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void
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_initialize_serial ()
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{
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#if 0
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add_com ("connect", class_obscure, connect_command,
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"Connect the terminal directly up to the command monitor.\n\
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Use <CR>~. or <CR>~^D to break out.");
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#endif /* 0 */
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}
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