From: Andrew Cagney <cagney@redhat.com>
Date: Mon, 15 Jul 2002 16:13:12 +0000 (+0000)
Subject: * sim-resume.c (sim_resume): Add local variable sig_to_deliver to
X-Git-Url: http://git.efficios.com/?a=commitdiff_plain;h=39248af88ff763d5996858f16e87c7c1e14facfd;p=deliverable%2Fbinutils-gdb.git

* sim-resume.c (sim_resume): Add local variable sig_to_deliver to
avoid possible longjmp problems with automatic variable siggnal.
---

diff --git a/sim/common/ChangeLog b/sim/common/ChangeLog
index 6ab7edf049..a55a55cb17 100644
--- a/sim/common/ChangeLog
+++ b/sim/common/ChangeLog
@@ -1,3 +1,8 @@
+2002-07-15  Andrew Cagney  <ac131313@redhat.com>
+
+	* sim-resume.c (sim_resume): Add local variable sig_to_deliver to
+	avoid possible longjmp problems with automatic variable siggnal.
+
 2002-07-14  Andrew Cagney  <ac131313@redhat.com>
 
 	From 2002-07-11 Momchil Velikov <velco@fadata.bg>:
diff --git a/sim/common/sim-resume.c b/sim/common/sim-resume.c
index 8cf75d5d80..d7d61e73c1 100644
--- a/sim/common/sim-resume.c
+++ b/sim/common/sim-resume.c
@@ -65,24 +65,29 @@ sim_resume (SIM_DESC sd,
       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);
+      int sig_to_deliver;
 
       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;
+      /* Only deliver the SIGGNAL [sic] the first time through - don't
+         re-deliver any SIGGNAL during a restart.  NOTE: A new local
+         variable is used to avoid problems with the automatic
+         variable ``siggnal'' being trashed by a long jump.  */
+      if (jmpval == sim_engine_start_jmpval)
+	sig_to_deliver = siggnal;
+      else
+	sig_to_deliver = 0;
 
 #ifdef SIM_CPU_EXCEPTION_RESUME
       {
 	sim_cpu* cpu = STATE_CPU (sd, next_cpu_nr);
-	SIM_CPU_EXCEPTION_RESUME(sd, cpu, siggnal);
+	SIM_CPU_EXCEPTION_RESUME(sd, cpu, sig_to_deliver);
       }
 #endif
 
-      sim_engine_run (sd, next_cpu_nr, nr_cpus, siggnal);
+      sim_engine_run (sd, next_cpu_nr, nr_cpus, sig_to_deliver);
     }
   engine->jmpbuf = NULL;