2005-11-24  Andrew Stubbs  <andrew.stubbs@st.com>

	* frame.c (get_prev_frame_1): Check the PC is within the program
	before allowing the frame to be created.

Index: src/gdb/frame.c
===================================================================
--- src.orig/gdb/frame.c	2005-11-24 16:45:22.000000000 +0000
+++ src/gdb/frame.c	2005-11-24 17:24:09.000000000 +0000
@@ -1123,6 +1123,16 @@ get_prev_frame_1 (struct frame_info *thi
   this_frame->prev = prev_frame;
   prev_frame->next = this_frame;
 
+  /* Check that the new frame would refer to a location within the
+     program.  This has to be done after it is linked in or the
+     function calls will not work.  If the location is junk then
+     we have probably dropped off the bottom of the stack.  */
+  if (!find_pc_section (frame_unwind_address_in_block (this_frame)))
+    {
+      this_frame->prev = NULL;
+      return NULL;
+    }
+
   if (frame_debug)
     {
       fprintf_unfiltered (gdb_stdlog, "-> ");