unwind-dw2-fde.c (__register_frame_info_bases): Check for null begin parameter…

unwind-dw2-fde.c (__register_frame_info_bases): Check for null begin parameter (as well as pointer to null).

	* unwind-dw2-fde.c (__register_frame_info_bases): Check for
	null begin parameter (as well as pointer to null).
	(__deregister_frame_info_bases): Likewise.

From-SVN: r65799

gcc/ChangeLog

+2003-04-18  Douglas B Rupp  <rupp@gnat.com>
+
+	* unwind-dw2-fde.c (__register_frame_info_bases): Check for
+	null begin parameter (as well as pointer to null).
+	(__deregister_frame_info_bases): Likewise.
+
 2003-04-18  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
 	* function.c (purge_addressof_1): For ADDRESSOF, see if SUB is a

gcc/unwind-dw2-fde.c

@@ -78,7 +78,7 @@ __register_frame_info_bases (void *begin, struct object *ob,
 			     void *tbase, void *dbase)
 {
   /* If .eh_frame is empty, don't register at all.  */
-  if (*(uword *) begin == 0)
+  if ((uword *) begin == 0 || *(uword *) begin == 0)
     return;
 
   ob->pc_begin = (void *)-1;
@@ -176,7 +176,7 @@ __deregister_frame_info_bases (void *begin)
   struct object *ob = 0;
 
   /* If .eh_frame is empty, we haven't registered.  */
-  if (*(uword *) begin == 0)
+  if ((uword *) begin == 0 || *(uword *) begin == 0)
     return ob;
 
   init_object_mutex_once ();