[patch] 1/3: Fix crash on DW_OP_fbreg w/o DW_AT_frame_base

[Jan Kratochvil]

Hi,

very old GCCs produced wrong debug info and GDB HEAD still crashes on it.
GCC PR 19124.

Location list was using DW_OP_fbreg but no DW_AT_frame_base was defined.

No regressions on x86_64.


Regards,
Jan
-------------- next part --------------
2008-04-28  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* dwarf2loc.c (dwarf_expr_frame_base): Error out on missing
	SYMBOL_LOCATION_BATON.

--- ./gdb/dwarf2loc.c	26 Mar 2008 14:53:28 -0000	1.50
+++ ./gdb/dwarf2loc.c	28 Apr 2008 00:26:50 -0000
@@ -166,8 +166,13 @@ dwarf_expr_frame_base (void *baton, gdb_
     {
       struct dwarf2_locexpr_baton *symbaton;
       symbaton = SYMBOL_LOCATION_BATON (framefunc);
-      *length = symbaton->size;
-      *start = symbaton->data;
+      if (symbaton != NULL)
+	{
+	  *length = symbaton->size;
+	  *start = symbaton->data;
+	}
+      else
+	*start = NULL;
     }
 
   if (*start == NULL)