1 files changed, 140 insertions, 0 deletions
diff --git a/sim/rx/err.c b/sim/rx/err.c
new file mode 100644
index 0000000..3ab5c61
--- /dev/null
+++ b/sim/rx/err.c
@@ -0,0 +1,140 @@
+/* err.c --- handle errors for RX simulator.
+
+Copyright (C) 2008, 2009 Free Software Foundation, Inc.
+Contributed by Red Hat, Inc.
+
+This file is part of the GNU simulators.
+
+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 3 of the License, 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, see <http://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "err.h"
+
+static unsigned char ee_actions[SIM_ERR_NUM_ERRORS];
+
+static enum execution_error last_error;
+
+static void
+ee_overrides ()
+{
+  /* GCC may initialize a bitfield by reading the uninitialized byte,
+     masking in the bitfield, and writing the byte back out.  */
+  ee_actions[SIM_ERR_READ_UNWRITTEN_BYTES] = SIM_ERRACTION_IGNORE;
+  /* This breaks stack unwinding for exceptions because it leaves
+     MC_PUSHED_PC tags in the unwound stack frames.  */
+  ee_actions[SIM_ERR_CORRUPT_STACK] = SIM_ERRACTION_IGNORE;
+}
+
+void
+execution_error_init_standalone (void)
+{
+  int i;
+
+  for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
+    ee_actions[i] = SIM_ERRACTION_EXIT;
+
+  ee_overrides ();
+}
+
+void
+execution_error_init_debugger (void)
+{
+  int i;
+
+  for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
+    ee_actions[i] = SIM_ERRACTION_DEBUG;
+
+  ee_overrides ();
+}
+
+void
+execution_error_exit_all (void)
+{
+  int i;
+
+  for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
+    ee_actions[i] = SIM_ERRACTION_EXIT;
+}
+
+void
+execution_error_warn_all (void)
+{
+  int i;
+
+  for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
+    ee_actions[i] = SIM_ERRACTION_WARN;
+}
+
+void
+execution_error_ignore_all (void)
+{
+  int i;
+
+  for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
+    ee_actions[i] = SIM_ERRACTION_IGNORE;
+}
+
+void
+execution_error (enum execution_error num, unsigned long address)
+{
+  if (ee_actions[num] != SIM_ERRACTION_IGNORE)
+    last_error = num;
+
+  if (ee_actions[num] == SIM_ERRACTION_EXIT
+      || ee_actions[num] == SIM_ERRACTION_WARN)
+    {
+      switch (num)
+	{
+	case SIM_ERR_READ_UNWRITTEN_PAGES:
+	case SIM_ERR_READ_UNWRITTEN_BYTES:
+	  printf("Read from unwritten memory at 0x%lx\n", address);
+	  break;
+
+	case SIM_ERR_NULL_POINTER_DEREFERENCE:
+	  printf ("NULL pointer dereference\n");
+	  break;
+
+	case SIM_ERR_CORRUPT_STACK:
+	  printf ("Stack corruption detected at 0x%lx\n", address);
+	  break;
+
+	default:
+	  printf ("Unknown execution error %d\n", num);
+	  exit (1);
+	}
+    }
+
+  if (ee_actions[num] == SIM_ERRACTION_EXIT)
+    exit (1);
+}
+
+enum execution_error
+execution_error_get_last_error (void)
+{
+  return last_error;
+}
+
+void
+execution_error_clear_last_error (void)
+{
+  last_error = SIM_ERR_NONE;
+}
+
+void
+execution_error_set_action (enum execution_error num, enum execution_error_action act)
+{
+  ee_actions[num] = act;
+}