FYI: DW_FORM_ref_addr -vs- DWARF 3
http://sourceware.org/ml/gdb-patches/2010-03/msg00219.html
http://sourceware.org/ml/gdb-cvs/2010-03/msg00039.html

### src/gdb/ChangeLog	2010/03/04 19:00:18	1.11430
### src/gdb/ChangeLog	2010/03/04 22:01:09	1.11431
## -1,3 +1,9 @@
+2010-03-04  Tom Tromey  <tromey@redhat.com>
+
+	* dwarf2read.c (skip_one_die) <DW_FORM_ref_addr>: Use offset size
+	in DWARF 3 and later.
+	(read_attribute_value) <DW_FORM_ref_addr>: Likewise.
+
 2010-03-04  Keith Seitz  <keiths@redhat.com>
 
 	* linespec.c (decode_line_1): Update comments for is_quote_enclosed.
--- src/gdb/dwarf2read.c	2010/03/02 17:19:58	1.357
+++ src/gdb/dwarf2read.c	2010/03/04 22:01:10	1.358
@@ -2882,8 +2882,15 @@
     skip_attribute:
       switch (form)
 	{
-	case DW_FORM_addr:
 	case DW_FORM_ref_addr:
+	  /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
+	     and later it is offset sized.  */
+	  if (cu->header.version == 2)
+	    info_ptr += cu->header.addr_size;
+	  else
+	    info_ptr += cu->header.offset_size;
+	  break;
+	case DW_FORM_addr:
 	  info_ptr += cu->header.addr_size;
 	  break;
 	case DW_FORM_data1:
@@ -7017,8 +7024,14 @@
   attr->form = form;
   switch (form)
     {
-    case DW_FORM_addr:
     case DW_FORM_ref_addr:
+      if (cu->header.version == 2)
+	DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
+      else
+	DW_ADDR (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
+      info_ptr += bytes_read;
+      break;
+    case DW_FORM_addr:
       DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
       info_ptr += bytes_read;
       break;