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/* Generic simulator resume.
Copyright (C) 1997-2021 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/>. */
/* This must come before any other includes. */
#include "defs.h"
#include "sim-main.h"
#include "sim-assert.h"
/* Halt the simulator after just one instruction */
static void
has_stepped (SIM_DESC sd,
void *data)
{
ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
sim_engine_halt (sd, NULL, NULL, NULL_CIA, sim_stopped, SIM_SIGTRAP);
}
/* Generic resume - assumes the existance of sim_engine_run */
void
sim_resume (SIM_DESC sd,
int step,
int siggnal)
{
sim_engine *engine = STATE_ENGINE (sd);
jmp_buf buf;
int jmpval;
ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
/* we only want to be single stepping the simulator once */
if (engine->stepper != NULL)
{
sim_events_deschedule (sd, engine->stepper);
engine->stepper = NULL;
}
if (step)
engine->stepper = sim_events_schedule (sd, 1, has_stepped, sd);
sim_module_resume (sd);
/* run/resume the simulator */
engine->jmpbuf = &buf;
jmpval = setjmp (buf);
if (jmpval == sim_engine_start_jmpval
|| jmpval == sim_engine_restart_jmpval)
{
int last_cpu_nr = sim_engine_last_cpu_nr (sd);
int next_cpu_nr = sim_engine_next_cpu_nr (sd);
int nr_cpus = sim_engine_nr_cpus (sd);
int sig_to_deliver;
sim_events_preprocess (sd, last_cpu_nr >= nr_cpus, next_cpu_nr >= nr_cpus);
if (next_cpu_nr >= nr_cpus)
next_cpu_nr = 0;
/* Only deliver the SIGGNAL [sic] the first time through - don't
re-deliver any SIGGNAL during a restart. NOTE: A new local
variable is used to avoid problems with the automatic
variable ``siggnal'' being trashed by a long jump. */
if (jmpval == sim_engine_start_jmpval)
sig_to_deliver = siggnal;
else
sig_to_deliver = 0;
#ifdef SIM_CPU_EXCEPTION_RESUME
{
sim_cpu* cpu = STATE_CPU (sd, next_cpu_nr);
SIM_CPU_EXCEPTION_RESUME (sd, cpu, sig_to_deliver);
}
#endif
sim_engine_run (sd, next_cpu_nr, nr_cpus, sig_to_deliver);
}
engine->jmpbuf = NULL;
sim_module_suspend (sd);
}
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