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/* Generic simulator halt/restart.
Copyright (C) 1997-2019 Free Software Foundation, Inc.
Contributed by Cygnus Support.
This file is part of GDB, the GNU debugger.
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 <stdio.h>
#include "sim-main.h"
#include "sim-assert.h"
/* Get the run state.
REASON/SIGRC are the values returned by sim_stop_reason.
??? Should each cpu have its own copy? */
void
sim_engine_get_run_state (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
{
sim_engine *engine = STATE_ENGINE (sd);
ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
*reason = engine->reason;
*sigrc = engine->sigrc;
}
/* Set the run state to REASON/SIGRC.
REASON/SIGRC are the values returned by sim_stop_reason.
??? Should each cpu have its own copy? */
void
sim_engine_set_run_state (SIM_DESC sd, enum sim_stop reason, int sigrc)
{
sim_engine *engine = STATE_ENGINE (sd);
ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
engine->reason = reason;
engine->sigrc = sigrc;
}
/* Generic halt */
void
sim_engine_halt (SIM_DESC sd,
sim_cpu *last_cpu,
sim_cpu *next_cpu, /* NULL - use default */
sim_cia cia,
enum sim_stop reason,
int sigrc)
{
sim_engine *engine = STATE_ENGINE (sd);
ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
if (engine->jmpbuf != NULL)
{
jmp_buf *halt_buf = engine->jmpbuf;
engine->last_cpu = last_cpu;
engine->next_cpu = next_cpu;
engine->reason = reason;
engine->sigrc = sigrc;
SIM_ENGINE_HALT_HOOK (sd, last_cpu, cia);
#ifdef SIM_CPU_EXCEPTION_SUSPEND
if (last_cpu != NULL && reason != sim_exited)
SIM_CPU_EXCEPTION_SUSPEND (sd, last_cpu, sim_signal_to_host (sd, sigrc));
#endif
longjmp (*halt_buf, sim_engine_halt_jmpval);
}
else
{
sim_io_error (sd, "sim_halt - bad long jump");
abort ();
}
}
/* Generic restart */
void
sim_engine_restart (SIM_DESC sd,
sim_cpu *last_cpu,
sim_cpu *next_cpu,
sim_cia cia)
{
sim_engine *engine = STATE_ENGINE (sd);
ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
if (engine->jmpbuf != NULL)
{
jmp_buf *halt_buf = engine->jmpbuf;
engine->last_cpu = last_cpu;
engine->next_cpu = next_cpu;
SIM_ENGINE_RESTART_HOOK (sd, last_cpu, cia);
longjmp (*halt_buf, sim_engine_restart_jmpval);
}
else
sim_io_error (sd, "sim_restart - bad long jump");
}
/* Generic error code */
void
sim_engine_vabort (SIM_DESC sd,
sim_cpu *cpu,
sim_cia cia,
const char *fmt,
va_list ap)
{
ASSERT (sd == NULL || STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
if (sd == NULL)
{
vfprintf (stderr, fmt, ap);
fprintf (stderr, "\nQuit\n");
abort ();
}
else if (STATE_ENGINE (sd)->jmpbuf == NULL)
{
sim_io_evprintf (sd, fmt, ap);
sim_io_eprintf (sd, "\n");
sim_io_error (sd, "Quit Simulator");
abort ();
}
else
{
sim_io_evprintf (sd, fmt, ap);
sim_io_eprintf (sd, "\n");
sim_engine_halt (sd, cpu, NULL, cia, sim_stopped, SIM_SIGABRT);
}
}
void
sim_engine_abort (SIM_DESC sd,
sim_cpu *cpu,
sim_cia cia,
const char *fmt,
...)
{
va_list ap;
ASSERT (sd == NULL || STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
va_start (ap, fmt);
sim_engine_vabort (sd, cpu, cia, fmt, ap);
va_end (ap);
}
/* Generic next/last cpu */
int
sim_engine_last_cpu_nr (SIM_DESC sd)
{
sim_engine *engine = STATE_ENGINE (sd);
if (engine->last_cpu != NULL)
return engine->last_cpu - STATE_CPU (sd, 0);
else
return MAX_NR_PROCESSORS;
}
int
sim_engine_next_cpu_nr (SIM_DESC sd)
{
sim_engine *engine = STATE_ENGINE (sd);
if (engine->next_cpu != NULL)
return engine->next_cpu - STATE_CPU (sd, 0);
else
return sim_engine_last_cpu_nr (sd) + 1;
}
int
sim_engine_nr_cpus (SIM_DESC sd)
{
sim_engine *engine = STATE_ENGINE (sd);
return engine->nr_cpus;
}
/* Initialization */
static SIM_RC
sim_engine_init (SIM_DESC sd)
{
/* initialize the start/stop/resume engine */
sim_engine *engine = STATE_ENGINE (sd);
engine->jmpbuf = NULL;
engine->last_cpu = NULL;
engine->next_cpu = NULL;
engine->nr_cpus = MAX_NR_PROCESSORS;
engine->reason = sim_running;
engine->sigrc = 0;
engine->stepper = NULL; /* sim_events_init will clean it up */
return SIM_RC_OK;
}
SIM_RC
sim_engine_install (SIM_DESC sd)
{
SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
sim_module_add_init_fn (sd, sim_engine_init);
return SIM_RC_OK;
}
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