Index: gdb-6.5-prof/gdb/symtab.c
===================================================================
--- gdb-6.5-prof.orig/gdb/symtab.c	2006-11-29 03:27:18.000000000 +0100
+++ gdb-6.5-prof/gdb/symtab.c	2006-11-29 03:27:20.000000000 +0100
@@ -2022,8 +2022,8 @@
 /* Find the symtab associated with PC and SECTION.  Look through the
    psymtabs and read in another symtab if necessary. */
 
-struct symtab *
-find_pc_sect_symtab (CORE_ADDR pc, asection *section)
+static struct symtab *
+find_pc_sect_symtab_uncached (CORE_ADDR pc, asection *section)
 {
   struct block *b;
   struct blockvector *bv;
@@ -2123,6 +2123,24 @@
   return (s);
 }
 
+struct symtab *
+find_pc_sect_symtab (CORE_ADDR pc, asection *section)
+{
+  static CORE_ADDR cached_pc;
+  static asection *cached_section;
+  static struct symtab *cached_symtab;
+  static int try_cache = 0;
+
+  if (try_cache && (cached_pc == pc) && (cached_section == section))
+    return cached_symtab;
+
+  try_cache = 1;
+  cached_pc = pc;
+  cached_section = section;
+  cached_symtab = find_pc_sect_symtab_uncached (pc, section);
+  return cached_symtab;
+}
+
 /* Find the symtab associated with PC.  Look through the psymtabs and
    read in another symtab if necessary.  Backward compatibility, no section */