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161 lines
4.3 KiB
C
161 lines
4.3 KiB
C
/* Generic simulator halt/resume.
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Copyright (C) 1997-2018 Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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This file is part of GDB, the GNU debugger.
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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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#ifndef SIM_ENGINE_H
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#define SIM_ENGINE_H
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typedef struct _sim_engine sim_engine;
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struct _sim_engine
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{
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void *jmpbuf;
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sim_cpu *last_cpu;
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sim_cpu *next_cpu;
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int nr_cpus;
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enum sim_stop reason;
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sim_event *stepper;
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int sigrc;
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};
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/* jmpval: 0 (initial use) start simulator
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1 halt simulator
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2 restart simulator
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This is required by the ISO C standard (the only time 0 is returned
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is at the initial call to setjmp). */
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enum {
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sim_engine_start_jmpval,
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sim_engine_halt_jmpval,
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sim_engine_restart_jmpval,
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};
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/* Get/set the run state of CPU to REASON/SIGRC.
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REASON/SIGRC are the values returned by sim_stop_reason. */
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void sim_engine_get_run_state (SIM_DESC sd, enum sim_stop *reason, int *sigrc);
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void sim_engine_set_run_state (SIM_DESC sd, enum sim_stop reason, int sigrc);
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/* Halt the simulator *now* */
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extern void sim_engine_halt
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(SIM_DESC sd,
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sim_cpu *last_cpu, /* NULL -> in event-mgr */
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sim_cpu *next_cpu, /* NULL -> succ (last_cpu) or event-mgr */
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sim_cia cia,
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enum sim_stop reason,
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int sigrc) __attribute__ ((noreturn));
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/* Halt hook - allow target specific operation when halting a
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simulator */
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#if !defined (SIM_ENGINE_HALT_HOOK)
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#define SIM_ENGINE_HALT_HOOK(SD, LAST_CPU, CIA) \
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if ((LAST_CPU) != NULL) CPU_PC_SET (LAST_CPU, CIA)
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#endif
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/* NB: If a port uses the SIM_CPU_EXCEPTION_* hooks, the default
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SIM_ENGINE_HALT_HOOK and SIM_ENGINE_RESUME_HOOK must not be used.
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They conflict in that the PC set by the HALT_HOOK may overwrite the
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proper one, as intended to be saved by the EXCEPTION_TRIGGER
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hook. */
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/* restart the simulator *now* */
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extern void sim_engine_restart
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(SIM_DESC sd,
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sim_cpu *last_cpu, /* NULL -> in event-mgr */
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sim_cpu *next_cpu, /* NULL -> succ (last_cpu) or event-mgr */
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sim_cia cia);
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/* Restart hook - allow target specific operation when restarting a
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simulator */
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#if !defined (SIM_ENGINE_RESTART_HOOK)
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#define SIM_ENGINE_RESTART_HOOK(SD, LAST_CPU, CIA) SIM_ENGINE_HALT_HOOK(SD, LAST_CPU, CIA)
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#endif
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/* Abort the simulator *now*.
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This function is NULL safe. It can be called when either of SD or
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CIA are NULL.
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This function is setjmp/longjmp safe. It can be called when of
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the sim_engine setjmp/longjmp buffer has not been established.
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Simulators that are using components such as sim-core but are not
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yet using this sim-engine module should link in file sim-abort.o
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which implements a non setjmp/longjmp version of
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sim_engine_abort. */
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extern void sim_engine_abort
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(SIM_DESC sd,
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sim_cpu *cpu,
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sim_cia cia,
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const char *fmt,
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...) __attribute__ ((format (printf, 4, 5))) __attribute__ ((noreturn));
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extern void sim_engine_vabort
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(SIM_DESC sd,
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sim_cpu *cpu,
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sim_cia cia,
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const char *fmt,
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va_list ap) __attribute__ ((noreturn));
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/* No abort hook - when possible this function exits using the
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engine_halt function (and SIM_ENGINE_HALT_HOOK). */
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/* Called by the generic sim_resume to run the simulation within the
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above safty net.
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An example implementation of sim_engine_run can be found in the
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file sim-run.c */
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extern void sim_engine_run
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(SIM_DESC sd,
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int next_cpu_nr,
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int nr_cpus,
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int siggnal); /* most simulators ignore siggnal */
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/* Determine the state of next/last cpu when the simulator was last
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halted - a value >= MAX_NR_PROCESSORS indicates that the
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event-queue was next/last. */
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extern int sim_engine_next_cpu_nr (SIM_DESC sd);
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extern int sim_engine_last_cpu_nr (SIM_DESC sd);
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extern int sim_engine_nr_cpus (SIM_DESC sd);
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/* Establish the simulator engine */
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MODULE_INSTALL_FN sim_engine_install;
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#endif
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