diff options
Diffstat (limited to 'sim/common/sim-engine.c')
| -rw-r--r-- | sim/common/sim-engine.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/sim/common/sim-engine.c b/sim/common/sim-engine.c new file mode 100644 index 0000000..9415f63 --- /dev/null +++ b/sim/common/sim-engine.c @@ -0,0 +1,210 @@ +/* Generic simulator halt/restart. + Copyright (C) 1997, 1998 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 2, 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 <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"); +} + + +/* 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"); + } + 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; +} |