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4a94e36819
This commit brings all the changes made by running gdb/copyright.py as per GDB's Start of New Year Procedure. For the avoidance of doubt, all changes in this commits were performed by the script.
236 lines
6.4 KiB
C
236 lines
6.4 KiB
C
/* New version of run front end support for simulators.
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Copyright (C) 1997-2022 Free Software Foundation, Inc.
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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 3 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, see <http://www.gnu.org/licenses/>. */
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/* Need to be before general includes, to pick up e.g. _GNU_SOURCE. */
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#include "defs.h"
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#include <signal.h>
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#include <stdlib.h>
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/* For strsignal. */
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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/* For chdir. */
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#include <unistd.h>
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#endif
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#include "bfd.h"
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#include "environ.h"
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#include "sim-main.h"
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#include "sim-signal.h"
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#include "sim/callback.h"
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#ifndef HAVE_STRSIGNAL
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/* While libiberty provides a fallback, it doesn't provide a prototype. */
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extern const char *strsignal (int);
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#endif
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static void usage (void);
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extern host_callback default_callback;
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static const char *myname;
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static SIM_DESC sd;
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static RETSIGTYPE
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cntrl_c (int sig)
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{
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if (! sim_stop (sd))
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{
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fprintf (stderr, "Quit!\n");
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exit (1);
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}
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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;
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char **prog_argv = NULL;
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char **prog_envp = NULL;
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struct bfd *prog_bfd;
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enum sim_stop reason;
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int sigrc = 0;
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int single_step = 0;
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RETSIGTYPE (*prev_sigint) ();
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myname = lbasename (argv[0]);
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/* INTERNAL: When MYNAME is `step', single step the simulator
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instead of allowing it to run free. The sole purpose of this
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HACK is to allow the sim_resume interface's step argument to be
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tested without having to build/run gdb. */
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if (strlen (myname) > 4 && strcmp (myname - 4, "step") == 0)
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{
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single_step = 1;
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}
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/* Create an instance of the simulator. */
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default_callback.init (&default_callback);
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sd = sim_open (SIM_OPEN_STANDALONE, &default_callback, NULL, argv);
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if (sd == 0)
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exit (1);
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if (STATE_MAGIC (sd) != SIM_MAGIC_NUMBER)
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{
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fprintf (stderr, "Internal error - bad magic number in simulator struct\n");
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abort ();
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}
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/* We can't set the endianness in the callback structure until sim_config is
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called, which happens in sim_open. If it's still the default, switch it.
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Don't use CURRENT_TARGET_BYTE_ORDER as all its internal processing already
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happened in sim_config. */
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if (default_callback.target_endian == BFD_ENDIAN_UNKNOWN)
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default_callback.target_endian = current_target_byte_order;
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/* Was there a program to run? */
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prog_argv = STATE_PROG_ARGV (sd);
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prog_envp = STATE_PROG_ENVP (sd) ? : environ;
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prog_bfd = STATE_PROG_BFD (sd);
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if (prog_argv == NULL || *prog_argv == NULL)
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usage ();
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name = STATE_PROG_FILE (sd);
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/* For simulators that don't open prog during sim_open() */
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if (prog_bfd == NULL)
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{
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prog_bfd = bfd_openr (name, 0);
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if (prog_bfd == NULL)
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{
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fprintf (stderr, "%s: can't open \"%s\": %s\n",
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myname, name, bfd_errmsg (bfd_get_error ()));
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exit (1);
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}
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if (!bfd_check_format (prog_bfd, bfd_object))
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{
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fprintf (stderr, "%s: \"%s\" is not an object file: %s\n",
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myname, name, bfd_errmsg (bfd_get_error ()));
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exit (1);
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}
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}
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if (STATE_VERBOSE_P (sd))
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printf ("%s %s\n", myname, name);
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/* Load the program into the simulator. */
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if (sim_load (sd, name, prog_bfd, 0) == SIM_RC_FAIL)
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exit (1);
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/* Prepare the program for execution. */
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sim_create_inferior (sd, prog_bfd, prog_argv, prog_envp);
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/* To accommodate relative file paths, chdir to sysroot now. We
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mustn't do this until BFD has opened the program, else we wouldn't
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find the executable if it has a relative file path. */
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if (simulator_sysroot[0] != '\0' && chdir (simulator_sysroot) < 0)
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{
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fprintf (stderr, "%s: can't change directory to \"%s\"\n",
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myname, simulator_sysroot);
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exit (1);
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}
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/* Run/Step the program. */
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if (single_step)
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{
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do
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{
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prev_sigint = signal (SIGINT, cntrl_c);
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sim_resume (sd, 1/*step*/, 0);
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signal (SIGINT, prev_sigint);
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sim_stop_reason (sd, &reason, &sigrc);
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if ((reason == sim_stopped) &&
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(sigrc == sim_signal_to_host (sd, SIM_SIGINT)))
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break; /* exit on control-C */
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}
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/* remain on breakpoint or signals in oe mode*/
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while (((reason == sim_signalled) &&
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(sigrc == sim_signal_to_host (sd, SIM_SIGTRAP))) ||
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((reason == sim_stopped) &&
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(STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)));
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}
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else
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{
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do
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{
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#if defined (HAVE_SIGACTION) && defined (SA_RESTART)
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struct sigaction sa, osa;
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sa.sa_handler = cntrl_c;
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sigemptyset (&sa.sa_mask);
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sa.sa_flags = 0;
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sigaction (SIGINT, &sa, &osa);
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prev_sigint = osa.sa_handler;
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#else
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prev_sigint = signal (SIGINT, cntrl_c);
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#endif
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sim_resume (sd, 0, sigrc);
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signal (SIGINT, prev_sigint);
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sim_stop_reason (sd, &reason, &sigrc);
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if ((reason == sim_stopped) &&
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(sigrc == sim_signal_to_host (sd, SIM_SIGINT)))
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break; /* exit on control-C */
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/* remain on signals in oe mode */
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} while ((reason == sim_stopped) &&
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(STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT));
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}
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/* Print any stats the simulator collected. */
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if (STATE_VERBOSE_P (sd))
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sim_info (sd, 0);
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/* Shutdown the simulator. */
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sim_close (sd, 0);
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/* If reason is sim_exited, then sigrc holds the exit code which we want
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to return. If reason is sim_stopped or sim_signalled, then sigrc holds
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the signal that the simulator received; we want to return that to
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indicate failure. */
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/* Why did we stop? */
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switch (reason)
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{
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case sim_signalled:
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case sim_stopped:
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if (sigrc != 0)
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fprintf (stderr, "program stopped with signal %d (%s).\n", sigrc,
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strsignal (sigrc));
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break;
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case sim_exited:
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break;
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default:
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fprintf (stderr, "program in undefined state (%d:%d)\n", reason, sigrc);
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break;
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}
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return sigrc;
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}
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static void
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usage (void)
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{
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fprintf (stderr, "Usage: %s [options] [VAR=VAL|--] program [program args]\n",
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myname);
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fprintf (stderr, "Run `%s --help' for full list of options.\n", myname);
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exit (1);
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}
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