Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 85 insertions, 0 deletions

diff --git a/sim/common/sim-resume.c b/sim/common/sim-resume.c
new file mode 100644
index 0000000..09b475e
--- /dev/null
+++ b/sim/common/sim-resume.c
@@ -0,0 +1,85 @@
+/* Generic simulator 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.  */
+
+#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);
+
+      sim_events_preprocess (sd, last_cpu_nr >= nr_cpus, next_cpu_nr >= nr_cpus);
+      if (next_cpu_nr >= nr_cpus)
+	next_cpu_nr = 0;
+
+#ifdef SIM_CPU_EXCEPTION_RESUME
+      {
+	sim_cpu* cpu = STATE_CPU (sd, next_cpu_nr);
+	SIM_CPU_EXCEPTION_RESUME(sd, cpu, siggnal);
+      }
+#endif
+
+      sim_engine_run (sd, next_cpu_nr, nr_cpus, siggnal);
+    }
+  engine->jmpbuf = NULL;
+
+  sim_module_suspend (sd);
+}