o Implement generic halt/restart/abort module.

	Use in tic80 and d30v simulators.
o	Add signal hook to sim-core module

1 files changed, 122 insertions, 0 deletions

diff --git a/sim/common/sim-engine.h b/sim/common/sim-engine.h
new file mode 100644
index 0000000..57c43e9
--- /dev/null
+++ b/sim/common/sim-engine.h
@@ -0,0 +1,122 @@
+/* Generic simulator halt/resume.
+   Copyright (C) 1997 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.  */
+
+#ifndef SIM_ENGINE_H
+#define SIM_ENGINE_H
+
+
+typedef struct _sim_engine sim_engine;
+struct _sim_engine
+{
+  void *jmpbuf;
+  sim_cpu *last_cpu;
+  sim_cpu *next_cpu;
+  enum sim_stop reason;
+  sim_event *stepper;
+  int sigrc;
+};
+
+
+
+/* Halt the simulator *now* */
+
+extern void sim_engine_halt
+(SIM_DESC sd,
+ sim_cpu *last_cpu,
+ sim_cpu *next_cpu, /* NULL -> succ (last_cpu) or event-mgr */
+ sim_cia cia,
+ enum sim_stop reason,
+ int sigrc);
+
+/* Halt hook - allow target specific operation when halting a
+   simulator */
+
+#if !defined (SIM_ENGINE_HALT_HOOK)
+#define SIM_ENGINE_HALT_HOOK(SD, LAST_CPU, CIA) if ((LAST_CPU) != NULL) (LAST_CPU)->cia = cia
+#endif
+
+
+
+/* restart the simulator *now* */
+
+extern void sim_engine_restart
+(SIM_DESC sd,
+ sim_cpu *last_cpu,
+ sim_cpu *next_cpu,
+ sim_cia cia);
+
+/* Restart hook - allow target specific operation when restarting a
+   simulator */
+
+#if !defined (SIM_ENGINE_RESTART_HOOK)
+#define SIM_ENGINE_RESTART_HOOK(SD, LAST_CPU, CIA) SIM_ENGINE_HALT_HOOK(SD, LAST_CPU, CIA)
+#endif
+
+
+
+
+/* Abort the simulator *now*.
+
+   This function is NULL safe.  It can be called when either of SD or
+   CIA are NULL.
+
+   This function is setjmp/longjmp safe.  It can be called when of
+   the sim_engine setjmp/longjmp buffer has not been established.
+
+   Simulators that are using components such as sim-core but are not
+   yet using this sim-engine module should link in file sim-abort.o
+   which implements a non setjmp/longjmp version of
+   sim_engine_abort. */
+
+extern void sim_engine_abort
+(SIM_DESC sd,
+ sim_cpu *cpu,
+ sim_cia cia,
+ const char *fmt,
+ ...);
+
+/* No abort hook - when possible this function exits using the
+   engine_halt function (and SIM_ENGINE_HALT_HOOK). */
+
+
+
+
+/* Called by the generic sim_resume to run the simulation within the
+   above safty net.
+
+   An example implementation of sim_engine_run can be found in the
+   file sim-run.c */
+
+extern void sim_engine_run
+(SIM_DESC sd,
+ int next_cpu_nr,
+ int siggnal); /* most simulators ignore siggnal */
+
+
+
+/* Determine the state of next/last cpu when the simulator was last
+   halted - a value >= nr-cpus indicates that the event-queue was
+   next/last. */
+
+extern int sim_engine_next_cpu_nr (SIM_DESC sd);
+extern int sim_engine_last_cpu_nr (SIM_DESC sd);
+
+
+#endif