319 lines
6.3 KiB
C
319 lines
6.3 KiB
C
/* This file is part of the program psim.
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Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
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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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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <signal.h>
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#include "psim.h"
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#include "options.h"
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#include "device.h" /* FIXME: psim should provide the interface */
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#include "events.h" /* FIXME: psim should provide the interface */
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#else
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#endif
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#include <errno.h>
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#if !defined(O_NDELAY) || !defined(F_GETFL) || !defined(F_SETFL)
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#undef WITH_STDIO
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#define WITH_STDIO DO_USE_STDIO
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#endif
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extern char **environ;
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static psim *simulation = NULL;
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void
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sim_io_poll_quit (void)
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{
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/* nothing to do */
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}
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void
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sim_io_printf_filtered(const char *msg, ...)
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{
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va_list ap;
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va_start(ap, msg);
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vprintf(msg, ap);
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va_end(ap);
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}
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void
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error (const char *msg, ...)
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{
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va_list ap;
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va_start(ap, msg);
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vprintf(msg, ap);
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printf("\n");
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va_end(ap);
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/* any final clean up */
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if (ppc_trace[trace_print_info] && simulation != NULL)
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psim_print_info (simulation, ppc_trace[trace_print_info]);
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exit (1);
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}
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int
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sim_io_write_stdout(const char *buf,
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int sizeof_buf)
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{
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switch (CURRENT_STDIO) {
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case DO_USE_STDIO:
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{
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int i;
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for (i = 0; i < sizeof_buf; i++) {
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putchar(buf[i]);
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}
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return i;
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}
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break;
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case DONT_USE_STDIO:
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return write(1, buf, sizeof_buf);
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break;
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default:
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error("sim_io_write_stdout: invalid switch\n");
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}
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return 0;
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}
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int
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sim_io_write_stderr(const char *buf,
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int sizeof_buf)
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{
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switch (CURRENT_STDIO) {
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case DO_USE_STDIO:
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{
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int i;
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for (i = 0; i < sizeof_buf; i++) {
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fputc(buf[i], stderr);
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}
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return i;
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}
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break;
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case DONT_USE_STDIO:
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return write(2, buf, sizeof_buf);
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break;
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default:
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error("sim_io_write_stdout: invalid switch\n");
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}
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return 0;
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}
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int
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sim_io_read_stdin(char *buf,
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int sizeof_buf)
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{
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switch (CURRENT_STDIO) {
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case DO_USE_STDIO:
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if (sizeof_buf > 1) {
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if (fgets(buf, sizeof_buf, stdin) != NULL)
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return strlen(buf);
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}
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else if (sizeof_buf == 1) {
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char b[2];
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if (fgets(b, sizeof(b), stdin) != NULL) {
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memcpy(buf, b, strlen(b));
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return strlen(b);
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}
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}
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else if (sizeof_buf == 0)
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return 0;
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return sim_io_eof;
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break;
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case DONT_USE_STDIO:
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#if defined(O_NDELAY) && defined(F_GETFL) && defined(F_SETFL)
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{
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/* check for input */
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int flags;
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int status;
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int nr_read;
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int result;
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/* get the old status */
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flags = fcntl(0, F_GETFL, 0);
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if (flags == -1) {
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perror("sim_io_read_stdin");
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return sim_io_eof;
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}
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/* temp, disable blocking IO */
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status = fcntl(0, F_SETFL, flags | O_NDELAY);
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if (status == -1) {
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perror("sim_io_read_stdin");
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return sim_io_eof;
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}
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/* try for input */
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nr_read = read(0, buf, sizeof_buf);
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if (nr_read > 0
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|| (nr_read == 0 && sizeof_buf == 0))
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result = nr_read;
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else if (nr_read == 0)
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result = sim_io_eof;
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else { /* nr_read < 0 */
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if (errno == EAGAIN)
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result = sim_io_not_ready;
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else
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result = sim_io_eof;
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}
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/* return to regular vewing */
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status = fcntl(0, F_SETFL, flags);
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if (status == -1) {
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perror("sim_io_read_stdin");
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return sim_io_eof;
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}
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return result;
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}
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break;
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#endif
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default:
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error("sim_io_read_stdin: invalid switch\n");
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break;
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}
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return 0;
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}
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void
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sim_io_flush_stdoutput(void)
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{
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switch (CURRENT_STDIO) {
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case DO_USE_STDIO:
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fflush (stdout);
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break;
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case DONT_USE_STDIO:
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break;
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default:
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error("sim_io_flush_stdoutput: invalid switch\n");
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break;
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}
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}
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void *
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zalloc(long size)
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{
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void *memory = malloc(size);
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if (memory == NULL)
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error("zmalloc failed\n");
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memset(memory, 0, size);
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return memory;
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}
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void
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zfree(void *chunk)
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{
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free(chunk);
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}
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/* When a CNTRL-C occures, queue an event to shut down the simulation */
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static RETSIGTYPE
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cntrl_c(int sig)
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{
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psim_stop (simulation);
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}
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int
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main(int argc, char **argv)
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{
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const char *name_of_file;
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char *arg_;
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psim_status status;
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device *root = psim_tree();
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/* parse the arguments */
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argv = psim_options(root, argv + 1);
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if (argv[0] == NULL) {
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if (ppc_trace[trace_opts]) {
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print_options ();
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return 0;
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} else {
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psim_usage(0);
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}
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}
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name_of_file = argv[0];
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if (ppc_trace[trace_opts])
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print_options ();
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/* create the simulator */
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simulation = psim_create(name_of_file, root);
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/* fudge the environment so that _=prog-name */
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arg_ = (char*)zalloc(strlen(argv[0]) + strlen("_=") + 1);
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strcpy(arg_, "_=");
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strcat(arg_, argv[0]);
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putenv(arg_);
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/* initialize it */
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psim_init(simulation);
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psim_stack(simulation, argv, environ);
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{
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RETSIGTYPE (*prev) ();
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prev = signal(SIGINT, cntrl_c);
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psim_run(simulation);
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signal(SIGINT, prev);
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}
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/* any final clean up */
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if (ppc_trace[trace_print_info])
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psim_print_info (simulation, ppc_trace[trace_print_info]);
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/* why did we stop */
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status = psim_get_status(simulation);
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switch (status.reason) {
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case was_continuing:
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error("psim: continuing while stoped!\n");
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return 0;
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case was_trap:
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error("psim: no trap insn\n");
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return 0;
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case was_exited:
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return status.signal;
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case was_signalled:
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printf ("%s: Caught signal %d at address 0x%lx\n",
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name_of_file, (int)status.signal,
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(long)status.program_counter);
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return status.signal;
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default:
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error("unknown halt condition\n");
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return 0;
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}
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}
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