/* The common simulator framework for GDB, the GNU Debugger.
Copyright 2002-2018 Free Software Foundation, Inc.
Contributed by Andrew Cagney and Red Hat.
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 3 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, see <http://www.gnu.org/licenses/>. */
#include "sim-main.h"
#include "sim-io.h"
#include "targ-vals.h"
#include <errno.h>
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
/* Define the rate at which the simulator should poll the host
for a quit. */
#ifndef POLL_QUIT_INTERVAL
#define POLL_QUIT_INTERVAL 0x10
#endif
static int poll_quit_count = POLL_QUIT_INTERVAL;
/* See the file include/callbacks.h for a description */
int
sim_io_init (SIM_DESC sd)
{
return STATE_CALLBACK (sd)->init (STATE_CALLBACK (sd));
}
int
sim_io_shutdown (SIM_DESC sd)
{
return STATE_CALLBACK (sd)->shutdown (STATE_CALLBACK (sd));
}
int
sim_io_unlink (SIM_DESC sd,
const char *f1)
{
return STATE_CALLBACK (sd)->unlink (STATE_CALLBACK (sd), f1);
}
long
sim_io_time (SIM_DESC sd,
long *t)
{
return STATE_CALLBACK (sd)->time (STATE_CALLBACK (sd), t);
}
int
sim_io_system (SIM_DESC sd, const char *s)
{
return STATE_CALLBACK (sd)->system (STATE_CALLBACK (sd), s);
}
int
sim_io_rename (SIM_DESC sd,
const char *f1,
const char *f2)
{
return STATE_CALLBACK (sd)->rename (STATE_CALLBACK (sd), f1, f2);
}
int
sim_io_write_stdout (SIM_DESC sd,
const char *buf,
int len)
{
switch (CURRENT_STDIO) {
case DO_USE_STDIO:
return STATE_CALLBACK (sd)->write_stdout (STATE_CALLBACK (sd), buf, len);
break;
case DONT_USE_STDIO:
return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 1, buf, len);
break;
default:
sim_io_error (sd, "sim_io_write_stdout: unaccounted switch\n");
break;
}
return 0;
}
void
sim_io_flush_stdout (SIM_DESC sd)
{
switch (CURRENT_STDIO) {
case DO_USE_STDIO:
STATE_CALLBACK (sd)->flush_stdout (STATE_CALLBACK (sd));
break;
case DONT_USE_STDIO:
break;
default:
sim_io_error (sd, "sim_io_flush_stdout: unaccounted switch\n");
break;
}
}
int
sim_io_write_stderr (SIM_DESC sd,
const char *buf,
int len)
{
switch (CURRENT_STDIO) {
case DO_USE_STDIO:
return STATE_CALLBACK (sd)->write_stderr (STATE_CALLBACK (sd), buf, len);
break;
case DONT_USE_STDIO:
return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 2, buf, len);
break;
default:
sim_io_error (sd, "sim_io_write_stderr: unaccounted switch\n");
break;
}
return 0;
}
void
sim_io_flush_stderr (SIM_DESC sd)
{
switch (CURRENT_STDIO) {
case DO_USE_STDIO:
STATE_CALLBACK (sd)->flush_stderr (STATE_CALLBACK (sd));
break;
case DONT_USE_STDIO:
break;
default:
sim_io_error (sd, "sim_io_flush_stderr: unaccounted switch\n");
break;
}
}
int
sim_io_write (SIM_DESC sd,
int fd,
const char *buf,
int len)
{
return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), fd, buf, len);
}
int
sim_io_read_stdin (SIM_DESC sd,
char *buf,
int len)
{
switch (CURRENT_STDIO) {
case DO_USE_STDIO:
return STATE_CALLBACK (sd)->read_stdin (STATE_CALLBACK (sd), buf, len);
break;
case DONT_USE_STDIO:
return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), 0, buf, len);
break;
default:
sim_io_error (sd, "sim_io_read_stdin: unaccounted switch\n");
break;
}
return 0;
}
int
sim_io_read (SIM_DESC sd, int fd,
char *buf,
int len)
{
return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), fd, buf, len);
}
int
sim_io_open (SIM_DESC sd,
const char *name,
int flags)
{
return STATE_CALLBACK (sd)->open (STATE_CALLBACK (sd), name, flags);
}
int
sim_io_lseek (SIM_DESC sd,
int fd,
long off,
int way)
{
return STATE_CALLBACK (sd)->lseek (STATE_CALLBACK (sd), fd, off, way);
}
int
sim_io_isatty (SIM_DESC sd,
int fd)
{
return STATE_CALLBACK (sd)->isatty (STATE_CALLBACK (sd), fd);
}
int
sim_io_get_errno (SIM_DESC sd)
{
return STATE_CALLBACK (sd)->get_errno (STATE_CALLBACK (sd));
}
int
sim_io_close (SIM_DESC sd,
int fd)
{
return STATE_CALLBACK (sd)->close (STATE_CALLBACK (sd), fd);
}
void
sim_io_printf (SIM_DESC sd,
const char *fmt,
...)
{
va_list ap;
va_start (ap, fmt);
STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
va_end (ap);
}
void
sim_io_vprintf (SIM_DESC sd,
const char *fmt,
va_list ap)
{
STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
}
void
sim_io_eprintf (SIM_DESC sd,
const char *fmt,
...)
{
va_list ap;
va_start (ap, fmt);
STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
va_end (ap);
}
void
sim_io_evprintf (SIM_DESC sd,
const char *fmt,
va_list ap)
{
STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
}
void
sim_io_error (SIM_DESC sd,
const char *fmt,
...)
{
if (sd == NULL || STATE_CALLBACK (sd) == NULL) {
va_list ap;
va_start (ap, fmt);
vfprintf (stderr, fmt, ap);
va_end (ap);
fprintf (stderr, "\n");
abort ();
}
else {
va_list ap;
va_start (ap, fmt);
STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
va_end (ap);
STATE_CALLBACK (sd)->error (STATE_CALLBACK (sd), "");
}
}
void
sim_io_poll_quit (SIM_DESC sd)
{
if (STATE_CALLBACK (sd)->poll_quit != NULL && poll_quit_count-- < 0)
{
poll_quit_count = POLL_QUIT_INTERVAL;
if (STATE_CALLBACK (sd)->poll_quit (STATE_CALLBACK (sd)))
sim_stop (sd);
}
}
/* Based on gdb-4.17/sim/ppc/main.c:sim_io_read_stdin().
FIXME: Should not be calling fcntl() or grubbing around inside of
->fdmap and ->errno.
FIXME: Some completly new mechanism for handling the general
problem of asynchronous IO is needed.
FIXME: This function does not supress the echoing (ECHO) of input.
Consequently polled input is always displayed.
FIXME: This function does not perform uncooked reads.
Consequently, data will not be read until an EOLN character has
been entered. A cntrl-d may force the early termination of a line */
int
sim_io_poll_read (SIM_DESC sd,
int sim_io_fd,
char *buf,
int sizeof_buf)
{
#if defined(O_NDELAY) && defined(F_GETFL) && defined(F_SETFL)
int fd = STATE_CALLBACK (sd)->fdmap[sim_io_fd];
int flags;
int status;
int nr_read;
int result;
STATE_CALLBACK (sd)->last_errno = 0;
/* get the old status */
flags = fcntl (fd, F_GETFL, 0);
if (flags == -1)
{
perror ("sim_io_poll_read");
return 0;
}
/* temp, disable blocking IO */
status = fcntl (fd, F_SETFL, flags | O_NDELAY);
if (status == -1)
{
perror ("sim_io_read_stdin");
return 0;
}
/* try for input */
nr_read = read (fd, buf, sizeof_buf);
if (nr_read >= 0)
{
/* printf ("<nr-read=%d>\n", nr_read); */
result = nr_read;
}
else
{ /* nr_read < 0 */
result = -1;
STATE_CALLBACK (sd)->last_errno = errno;
}
/* return to regular vewing */
status = fcntl (fd, F_SETFL, flags);
if (status == -1)
{
perror ("sim_io_read_stdin");
/* return 0; */
}
return result;
#else
return sim_io_read (sd, sim_io_fd, buf, sizeof_buf);
#endif
}
int
sim_io_stat (SIM_DESC sd, const char *path, struct stat *buf)
{
return STATE_CALLBACK (sd)->to_stat (STATE_CALLBACK (sd), path, buf);
}
int
sim_io_fstat (SIM_DESC sd, int fd, struct stat *buf)
{
return STATE_CALLBACK (sd)->to_fstat (STATE_CALLBACK (sd), fd, buf);
}