* Makefile.in (SIM_OBJS): Remove sim-resume.o

	* interp.c (sim_resume): New function from sim-resume.c, install
	the stepping event after having processed the pending ticks.
	(has_stepped): Likewise.
	(sim_info): Produce an output only if verbose or STATE_VERBOSE_P.

3 files changed, 88 insertions, 1 deletions

diff --git a/sim/m68hc11/ChangeLog b/sim/m68hc11/ChangeLog
index b17febb..0d6953b 100644
--- a/sim/m68hc11/ChangeLog
+++ b/sim/m68hc11/ChangeLog
@@ -1,3 +1,11 @@
+2001-07-22  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
+
+	* Makefile.in (SIM_OBJS): Remove sim-resume.o
+	* interp.c (sim_resume): New function from sim-resume.c, install
+	the stepping event after having processed the pending ticks.
+	(has_stepped): Likewise.
+	(sim_info): Produce an output only if verbose or STATE_VERBOSE_P.
+
 2001-07-10  Andrew Cagney  <ac131313@redhat.com>
 
 	* Makefile.in (gencode): Provide explicit path to gencode.c.
diff --git a/sim/m68hc11/Makefile.in b/sim/m68hc11/Makefile.in
index f2a384d..51e873b 100644
--- a/sim/m68hc11/Makefile.in
+++ b/sim/m68hc11/Makefile.in
@@ -30,7 +30,6 @@ SIM_OBJS = $(M68HC11_OBJS) \
 	sim-hload.o \
 	sim-engine.o \
 	sim-stop.o \
-	sim-resume.o \
 	sim-hrw.o \
 	sim-reason.o \
         $(SIM_EXTRA_OBJS)
diff --git a/sim/m68hc11/interp.c b/sim/m68hc11/interp.c
index e043992..c34facd 100644
--- a/sim/m68hc11/interp.c
+++ b/sim/m68hc11/interp.c
@@ -437,6 +437,10 @@ sim_info (SIM_DESC sd, int verbose)
   const char *cpu_type;
   const struct bfd_arch_info *arch;
 
+  /* Nothing to do if there is no verbose flag set.  */
+  if (verbose == 0 && STATE_VERBOSE_P (sd) == 0)
+    return;
+
   arch = STATE_ARCHITECTURE (sd);
   if (arch->arch == bfd_arch_m68hc11)
     cpu_type = "68HC11";
@@ -601,3 +605,79 @@ sim_do_command (SIM_DESC sd, char *cmd)
   if (STATE_ARCHITECTURE (sd) != cpu->cpu_configured_arch)
     sim_hw_configure (sd);
 }
+
+/* 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;
+    }
+  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;
+
+      /* Only deliver the siggnal ]sic] the first time through - don't
+         re-deliver any siggnal during a restart. */
+      if (jmpval == sim_engine_restart_jmpval)
+	siggnal = 0;
+
+      /* Install the stepping event after having processed some
+         pending events.  This is necessary for HC11/HC12 simulator
+         because the tick counter is incremented by the number of cycles
+         the instruction took.  Some pending ticks to process can still
+         be recorded internally by the simulator and sim_events_preprocess
+         will handle them.  If the stepping event is inserted before,
+         these pending ticks will raise the event and the simulator will
+         stop without having executed any instruction.  */
+      if (step)
+        engine->stepper = sim_events_schedule (sd, 0, has_stepped, sd);
+
+#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);
+}