485 lines
9.8 KiB
C
485 lines
9.8 KiB
C
/* Generic serial interface routines
|
||
Copyright 1992, 1993, 1996 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
||
#include "defs.h"
|
||
#include <ctype.h>
|
||
#include "serial.h"
|
||
#include "gdb_string.h"
|
||
#include "gdbcmd.h"
|
||
|
||
/* Linked list of serial I/O handlers */
|
||
|
||
static struct serial_ops *serial_ops_list = NULL;
|
||
|
||
/* This is the last serial stream opened. Used by connect command. */
|
||
|
||
static serial_t last_serial_opened = NULL;
|
||
|
||
/* Pointer to list of scb's. */
|
||
|
||
static serial_t scb_base;
|
||
|
||
/* Non-NULL gives filename which contains a recording of the remote session,
|
||
suitable for playback by gdbserver. */
|
||
|
||
char *serial_logfile = NULL;
|
||
FILE *serial_logfp = NULL;
|
||
|
||
|
||
static int serial_reading = 0;
|
||
static int serial_writing = 0;
|
||
|
||
void
|
||
serial_log_command (cmd)
|
||
const char *cmd;
|
||
{
|
||
if (serial_reading || serial_writing)
|
||
{
|
||
fputc_unfiltered ('\n', serial_logfp);
|
||
serial_reading = 0;
|
||
serial_writing = 0;
|
||
}
|
||
fprintf_unfiltered (serial_logfp, "c %s\n", cmd);
|
||
/* Make sure that the log file is as up-to-date as possible,
|
||
in case we are getting ready to dump core or something. */
|
||
fflush (serial_logfp);
|
||
}
|
||
|
||
static void
|
||
serial_logchar (ch)
|
||
int ch;
|
||
{
|
||
switch (ch)
|
||
{
|
||
case '\\': fputs_unfiltered ("\\\\", serial_logfp); break;
|
||
case '\b': fputs_unfiltered ("\\b", serial_logfp); break;
|
||
case '\f': fputs_unfiltered ("\\f", serial_logfp); break;
|
||
case '\n': fputs_unfiltered ("\\n", serial_logfp); break;
|
||
case '\r': fputs_unfiltered ("\\r", serial_logfp); break;
|
||
case '\t': fputs_unfiltered ("\\t", serial_logfp); break;
|
||
case '\v': fputs_unfiltered ("\\v", serial_logfp); break;
|
||
default: fprintf_unfiltered (serial_logfp, isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF); break;
|
||
}
|
||
}
|
||
|
||
int
|
||
serial_write (scb, str, len)
|
||
serial_t scb;
|
||
const char *str;
|
||
int len;
|
||
{
|
||
int count;
|
||
|
||
if (serial_logfp != NULL)
|
||
{
|
||
if (serial_reading)
|
||
{
|
||
fputc_unfiltered ('\n', serial_logfp);
|
||
serial_reading = 0;
|
||
}
|
||
if (!serial_writing)
|
||
{
|
||
serial_logchar ('w');
|
||
serial_logchar (' ');
|
||
serial_writing = 1;
|
||
}
|
||
for (count = 0; count < len; count++)
|
||
{
|
||
serial_logchar (str[count]);
|
||
}
|
||
/* Make sure that the log file is as up-to-date as possible,
|
||
in case we are getting ready to dump core or something. */
|
||
fflush (serial_logfp);
|
||
}
|
||
return (scb -> ops -> write (scb, str, len));
|
||
}
|
||
|
||
int
|
||
serial_readchar (scb, timeout)
|
||
serial_t scb;
|
||
int timeout;
|
||
{
|
||
int ch;
|
||
|
||
ch = scb -> ops -> readchar (scb, timeout);
|
||
if (serial_logfp != NULL)
|
||
{
|
||
if (serial_writing)
|
||
{
|
||
fputc_unfiltered ('\n', serial_logfp);
|
||
serial_writing = 0;
|
||
}
|
||
if (!serial_reading)
|
||
{
|
||
serial_logchar ('r');
|
||
serial_logchar (' ');
|
||
serial_reading = 1;
|
||
}
|
||
serial_logchar (ch);
|
||
/* Make sure that the log file is as up-to-date as possible,
|
||
in case we are getting ready to dump core or something. */
|
||
fflush (serial_logfp);
|
||
}
|
||
return (ch);
|
||
}
|
||
|
||
static struct serial_ops *
|
||
serial_interface_lookup (name)
|
||
char *name;
|
||
{
|
||
struct serial_ops *ops;
|
||
|
||
for (ops = serial_ops_list; ops; ops = ops->next)
|
||
if (strcmp (name, ops->name) == 0)
|
||
return ops;
|
||
|
||
return NULL;
|
||
}
|
||
|
||
void
|
||
serial_add_interface(optable)
|
||
struct serial_ops *optable;
|
||
{
|
||
optable->next = serial_ops_list;
|
||
serial_ops_list = optable;
|
||
}
|
||
|
||
/* Open up a device or a network socket, depending upon the syntax of NAME. */
|
||
|
||
serial_t
|
||
serial_open (name)
|
||
const char *name;
|
||
{
|
||
serial_t scb;
|
||
struct serial_ops *ops;
|
||
|
||
for (scb = scb_base; scb; scb = scb->next)
|
||
if (scb->name && strcmp (scb->name, name) == 0)
|
||
{
|
||
scb->refcnt++;
|
||
return scb;
|
||
}
|
||
|
||
if (strcmp (name, "pc") == 0)
|
||
ops = serial_interface_lookup ("pc");
|
||
else if (strchr (name, ':'))
|
||
ops = serial_interface_lookup ("tcp");
|
||
else if (strncmp (name, "lpt", 3) == 0)
|
||
ops = serial_interface_lookup ("parallel");
|
||
else
|
||
ops = serial_interface_lookup ("hardwire");
|
||
|
||
if (!ops)
|
||
return NULL;
|
||
|
||
scb = (serial_t)xmalloc (sizeof (struct _serial_t));
|
||
|
||
scb->ops = ops;
|
||
|
||
scb->bufcnt = 0;
|
||
scb->bufp = scb->buf;
|
||
|
||
if (scb->ops->open(scb, name))
|
||
{
|
||
free (scb);
|
||
return NULL;
|
||
}
|
||
|
||
scb->name = strsave (name);
|
||
scb->next = scb_base;
|
||
scb->refcnt = 1;
|
||
scb_base = scb;
|
||
|
||
last_serial_opened = scb;
|
||
|
||
if (serial_logfile != NULL)
|
||
{
|
||
serial_logfp = fopen (serial_logfile, "w");
|
||
if (serial_logfp == NULL)
|
||
{
|
||
perror_with_name (serial_logfile);
|
||
}
|
||
}
|
||
|
||
return scb;
|
||
}
|
||
|
||
serial_t
|
||
serial_fdopen (fd)
|
||
const int fd;
|
||
{
|
||
serial_t scb;
|
||
struct serial_ops *ops;
|
||
|
||
for (scb = scb_base; scb; scb = scb->next)
|
||
if (scb->fd == fd)
|
||
{
|
||
scb->refcnt++;
|
||
return scb;
|
||
}
|
||
|
||
ops = serial_interface_lookup ("hardwire");
|
||
|
||
if (!ops)
|
||
return NULL;
|
||
|
||
scb = (serial_t)xmalloc (sizeof (struct _serial_t));
|
||
|
||
scb->ops = ops;
|
||
|
||
scb->bufcnt = 0;
|
||
scb->bufp = scb->buf;
|
||
|
||
scb->fd = fd;
|
||
|
||
scb->name = NULL;
|
||
scb->next = scb_base;
|
||
scb->refcnt = 1;
|
||
scb_base = scb;
|
||
|
||
last_serial_opened = scb;
|
||
|
||
return scb;
|
||
}
|
||
|
||
void
|
||
serial_close(scb, really_close)
|
||
serial_t scb;
|
||
int really_close;
|
||
{
|
||
serial_t tmp_scb;
|
||
|
||
last_serial_opened = NULL;
|
||
|
||
if (serial_logfp)
|
||
{
|
||
if (serial_reading || serial_writing)
|
||
{
|
||
fputc_unfiltered ('\n', serial_logfp);
|
||
serial_reading = 0;
|
||
serial_writing = 0;
|
||
}
|
||
fclose (serial_logfp);
|
||
serial_logfp = NULL;
|
||
}
|
||
|
||
/* This is bogus. It's not our fault if you pass us a bad scb...! Rob, you
|
||
should fix your code instead. */
|
||
|
||
if (!scb)
|
||
return;
|
||
|
||
scb->refcnt--;
|
||
if (scb->refcnt > 0)
|
||
return;
|
||
|
||
if (really_close)
|
||
scb->ops->close (scb);
|
||
|
||
if (scb->name)
|
||
free (scb->name);
|
||
|
||
if (scb_base == scb)
|
||
scb_base = scb_base->next;
|
||
else
|
||
for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
|
||
{
|
||
if (tmp_scb->next != scb)
|
||
continue;
|
||
|
||
tmp_scb->next = tmp_scb->next->next;
|
||
break;
|
||
}
|
||
|
||
free(scb);
|
||
}
|
||
|
||
#if 0
|
||
/*
|
||
The connect command is #if 0 because I hadn't thought of an elegant
|
||
way to wait for I/O on two serial_t's simultaneously. Two solutions
|
||
came to mind:
|
||
|
||
1) Fork, and have have one fork handle the to user direction,
|
||
and have the other hand the to target direction. This
|
||
obviously won't cut it for MSDOS.
|
||
|
||
2) Use something like select. This assumes that stdin and
|
||
the target side can both be waited on via the same
|
||
mechanism. This may not be true for DOS, if GDB is
|
||
talking to the target via a TCP socket.
|
||
-grossman, 8 Jun 93
|
||
*/
|
||
|
||
/* Connect the user directly to the remote system. This command acts just like
|
||
the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
|
||
|
||
static serial_t tty_desc; /* Controlling terminal */
|
||
|
||
static void
|
||
cleanup_tty(ttystate)
|
||
serial_ttystate ttystate;
|
||
{
|
||
printf_unfiltered ("\r\n[Exiting connect mode]\r\n");
|
||
SERIAL_SET_TTY_STATE (tty_desc, ttystate);
|
||
free (ttystate);
|
||
SERIAL_CLOSE (tty_desc);
|
||
}
|
||
|
||
static void
|
||
connect_command (args, fromtty)
|
||
char *args;
|
||
int fromtty;
|
||
{
|
||
int c;
|
||
char cur_esc = 0;
|
||
serial_ttystate ttystate;
|
||
serial_t port_desc; /* TTY port */
|
||
|
||
dont_repeat();
|
||
|
||
if (args)
|
||
fprintf_unfiltered(gdb_stderr, "This command takes no args. They have been ignored.\n");
|
||
|
||
printf_unfiltered("[Entering connect mode. Use ~. or ~^D to escape]\n");
|
||
|
||
tty_desc = SERIAL_FDOPEN (0);
|
||
port_desc = last_serial_opened;
|
||
|
||
ttystate = SERIAL_GET_TTY_STATE (tty_desc);
|
||
|
||
SERIAL_RAW (tty_desc);
|
||
SERIAL_RAW (port_desc);
|
||
|
||
make_cleanup (cleanup_tty, ttystate);
|
||
|
||
while (1)
|
||
{
|
||
int mask;
|
||
|
||
mask = SERIAL_WAIT_2 (tty_desc, port_desc, -1);
|
||
|
||
if (mask & 2)
|
||
{ /* tty input */
|
||
char cx;
|
||
|
||
while (1)
|
||
{
|
||
c = SERIAL_READCHAR(tty_desc, 0);
|
||
|
||
if (c == SERIAL_TIMEOUT)
|
||
break;
|
||
|
||
if (c < 0)
|
||
perror_with_name("connect");
|
||
|
||
cx = c;
|
||
SERIAL_WRITE(port_desc, &cx, 1);
|
||
|
||
switch (cur_esc)
|
||
{
|
||
case 0:
|
||
if (c == '\r')
|
||
cur_esc = c;
|
||
break;
|
||
case '\r':
|
||
if (c == '~')
|
||
cur_esc = c;
|
||
else
|
||
cur_esc = 0;
|
||
break;
|
||
case '~':
|
||
if (c == '.' || c == '\004')
|
||
return;
|
||
else
|
||
cur_esc = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (mask & 1)
|
||
{ /* Port input */
|
||
char cx;
|
||
|
||
while (1)
|
||
{
|
||
c = SERIAL_READCHAR(port_desc, 0);
|
||
|
||
if (c == SERIAL_TIMEOUT)
|
||
break;
|
||
|
||
if (c < 0)
|
||
perror_with_name("connect");
|
||
|
||
cx = c;
|
||
|
||
SERIAL_WRITE(tty_desc, &cx, 1);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
#endif /* 0 */
|
||
|
||
/* VARARGS */
|
||
void
|
||
#ifdef ANSI_PROTOTYPES
|
||
serial_printf (serial_t desc, const char *format, ...)
|
||
#else
|
||
serial_printf (va_alist)
|
||
va_dcl
|
||
#endif
|
||
{
|
||
va_list args;
|
||
char *buf;
|
||
#ifdef ANSI_PROTOTYPES
|
||
va_start (args, format);
|
||
#else
|
||
serial_t desc;
|
||
char *format;
|
||
|
||
va_start (args);
|
||
desc = va_arg (args, serial_t);
|
||
format = va_arg (args, char *);
|
||
#endif
|
||
|
||
vasprintf (&buf, format, args);
|
||
SERIAL_WRITE (desc, buf, strlen (buf));
|
||
|
||
free (buf);
|
||
va_end (args);
|
||
}
|
||
|
||
void
|
||
_initialize_serial ()
|
||
{
|
||
#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_show_from_set (add_set_cmd ("remotelogfile", no_class,
|
||
var_filename, (char *)&serial_logfile,
|
||
"Set filename for remote session recording.\n\
|
||
This file is used to record the remote session for future playback\n\
|
||
by gdbserver.", &setlist),
|
||
&showlist);
|
||
|
||
}
|