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-rw-r--r--sim/ppc/main.c318
1 files changed, 318 insertions, 0 deletions
diff --git a/sim/ppc/main.c b/sim/ppc/main.c
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--- /dev/null
+++ b/sim/ppc/main.c
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+/* This file is part of the program psim.
+
+ Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
+
+ 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 <stdarg.h>
+#include <stdio.h>
+#include <fcntl.h>
+
+#include <signal.h>
+
+#include "psim.h"
+#include "options.h"
+#include "device.h" /* FIXME: psim should provide the interface */
+#include "events.h" /* FIXME: psim should provide the interface */
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#else
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+#endif
+
+#include <errno.h>
+
+#if !defined(O_NDELAY) || !defined(F_GETFL) || !defined(F_SETFL)
+#undef WITH_STDIO
+#define WITH_STDIO DO_USE_STDIO
+#endif
+
+
+extern char **environ;
+
+static psim *simulation = NULL;
+
+
+void
+sim_io_poll_quit (void)
+{
+ /* nothing to do */
+}
+
+void
+sim_io_printf_filtered(const char *msg, ...)
+{
+ va_list ap;
+ va_start(ap, msg);
+ vprintf(msg, ap);
+ va_end(ap);
+}
+
+void
+error (const char *msg, ...)
+{
+ va_list ap;
+ va_start(ap, msg);
+ vprintf(msg, ap);
+ printf("\n");
+ va_end(ap);
+
+ /* any final clean up */
+ if (ppc_trace[trace_print_info] && simulation != NULL)
+ psim_print_info (simulation, ppc_trace[trace_print_info]);
+
+ exit (1);
+}
+
+int
+sim_io_write_stdout(const char *buf,
+ int sizeof_buf)
+{
+ switch (CURRENT_STDIO) {
+ case DO_USE_STDIO:
+ {
+ int i;
+ for (i = 0; i < sizeof_buf; i++) {
+ putchar(buf[i]);
+ }
+ return i;
+ }
+ break;
+ case DONT_USE_STDIO:
+ return write(1, buf, sizeof_buf);
+ break;
+ default:
+ error("sim_io_write_stdout: invalid switch\n");
+ }
+ return 0;
+}
+
+int
+sim_io_write_stderr(const char *buf,
+ int sizeof_buf)
+{
+ switch (CURRENT_STDIO) {
+ case DO_USE_STDIO:
+ {
+ int i;
+ for (i = 0; i < sizeof_buf; i++) {
+ fputc(buf[i], stderr);
+ }
+ return i;
+ }
+ break;
+ case DONT_USE_STDIO:
+ return write(2, buf, sizeof_buf);
+ break;
+ default:
+ error("sim_io_write_stdout: invalid switch\n");
+ }
+ return 0;
+}
+
+int
+sim_io_read_stdin(char *buf,
+ int sizeof_buf)
+{
+ switch (CURRENT_STDIO) {
+ case DO_USE_STDIO:
+ if (sizeof_buf > 1) {
+ if (fgets(buf, sizeof_buf, stdin) != NULL)
+ return strlen(buf);
+ }
+ else if (sizeof_buf == 1) {
+ char b[2];
+ if (fgets(b, sizeof(b), stdin) != NULL) {
+ memcpy(buf, b, strlen(b));
+ return strlen(b);
+ }
+ }
+ else if (sizeof_buf == 0)
+ return 0;
+ return sim_io_eof;
+ break;
+ case DONT_USE_STDIO:
+#if defined(O_NDELAY) && defined(F_GETFL) && defined(F_SETFL)
+ {
+ /* check for input */
+ int flags;
+ int status;
+ int nr_read;
+ int result;
+ /* get the old status */
+ flags = fcntl(0, F_GETFL, 0);
+ if (flags == -1) {
+ perror("sim_io_read_stdin");
+ return sim_io_eof;
+ }
+ /* temp, disable blocking IO */
+ status = fcntl(0, F_SETFL, flags | O_NDELAY);
+ if (status == -1) {
+ perror("sim_io_read_stdin");
+ return sim_io_eof;
+ }
+ /* try for input */
+ nr_read = read(0, buf, sizeof_buf);
+ if (nr_read > 0
+ || (nr_read == 0 && sizeof_buf == 0))
+ result = nr_read;
+ else if (nr_read == 0)
+ result = sim_io_eof;
+ else { /* nr_read < 0 */
+ if (errno == EAGAIN)
+ result = sim_io_not_ready;
+ else
+ result = sim_io_eof;
+ }
+ /* return to regular vewing */
+ status = fcntl(0, F_SETFL, flags);
+ if (status == -1) {
+ perror("sim_io_read_stdin");
+ return sim_io_eof;
+ }
+ return result;
+ }
+ break;
+#endif
+ default:
+ error("sim_io_read_stdin: invalid switch\n");
+ break;
+ }
+ return 0;
+}
+
+void
+sim_io_flush_stdoutput(void)
+{
+ switch (CURRENT_STDIO) {
+ case DO_USE_STDIO:
+ fflush (stdout);
+ break;
+ case DONT_USE_STDIO:
+ break;
+ default:
+ error("sim_io_flush_stdoutput: invalid switch\n");
+ break;
+ }
+}
+
+
+void *
+zalloc(long size)
+{
+ void *memory = malloc(size);
+ if (memory == NULL)
+ error("zmalloc failed\n");
+ memset(memory, 0, size);
+ return memory;
+}
+
+void
+zfree(void *chunk)
+{
+ free(chunk);
+}
+
+/* When a CNTRL-C occures, queue an event to shut down the simulation */
+
+static RETSIGTYPE
+cntrl_c(int sig)
+{
+ psim_stop (simulation);
+}
+
+
+int
+main(int argc, char **argv)
+{
+ const char *name_of_file;
+ char *arg_;
+ psim_status status;
+ device *root = psim_tree();
+
+ /* parse the arguments */
+ argv = psim_options(root, argv + 1);
+ if (argv[0] == NULL) {
+ if (ppc_trace[trace_opts]) {
+ print_options ();
+ return 0;
+ } else {
+ psim_usage(0);
+ }
+ }
+ name_of_file = argv[0];
+
+ if (ppc_trace[trace_opts])
+ print_options ();
+
+ /* create the simulator */
+ simulation = psim_create(name_of_file, root);
+
+ /* fudge the environment so that _=prog-name */
+ arg_ = (char*)zalloc(strlen(argv[0]) + strlen("_=") + 1);
+ strcpy(arg_, "_=");
+ strcat(arg_, argv[0]);
+ putenv(arg_);
+
+ /* initialize it */
+ psim_init(simulation);
+ psim_stack(simulation, argv, environ);
+
+ {
+ RETSIGTYPE (*prev) ();
+ prev = signal(SIGINT, cntrl_c);
+ psim_run(simulation);
+ signal(SIGINT, prev);
+ }
+
+ /* any final clean up */
+ if (ppc_trace[trace_print_info])
+ psim_print_info (simulation, ppc_trace[trace_print_info]);
+
+ /* why did we stop */
+ status = psim_get_status(simulation);
+ switch (status.reason) {
+ case was_continuing:
+ error("psim: continuing while stoped!\n");
+ return 0;
+ case was_trap:
+ error("psim: no trap insn\n");
+ return 0;
+ case was_exited:
+ return status.signal;
+ case was_signalled:
+ printf ("%s: Caught signal %d at address 0x%lx\n",
+ name_of_file, (int)status.signal,
+ (long)status.program_counter);
+ return status.signal;
+ default:
+ error("unknown halt condition\n");
+ return 0;
+ }
+}
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