[RFA] Handle .gdb_index version 8.

[Doug Evans]

Hi.

GDB generates version 8 indices now.
Here's a patch to update the pretty-printer.

Ok to check in?

2013-01-23  Doug Evans  <dje@google.com>

	* dwarf.c (display_gdb_index): Handle .gdb_index version 8.

Index: dwarf.c
===================================================================
RCS file: /cvs/src/src/binutils/dwarf.c,v
retrieving revision 1.121
diff -u -p -r1.121 dwarf.c
--- dwarf.c	24 Oct 2012 01:59:39 -0000	1.121
+++ dwarf.c	23 Jan 2013 18:58:47 -0000
@@ -5699,7 +5699,7 @@ display_gdb_index (struct dwarf_section 
 
   /* Prior versions are obsolete, and future versions may not be
      backwards compatible.  */
-  if (version < 3 || version > 7)
+  if (version < 3 || version > 8)
     {
       warn (_("Unsupported version %lu.\n"), (unsigned long) version);
       return 0;
@@ -5712,6 +5712,10 @@ display_gdb_index (struct dwarf_section 
     warn (_("Version 5 does not include inlined functions.\n"));
   if (version < 7)
       warn (_("Version 6 does not include symbol attributes.\n"));
+  /* Version 7 indices generated by Gold have bad type unit references,
+     PR binutils/15021.  But we don't know if the index was generated by
+     Gold or not, so to avoid worrying users with gdb-generated indices
+     we say nothing for version 7 here.  */
 
   cu_list_offset = byte_get_little_endian (start + 4, 4);
   tu_list_offset = byte_get_little_endian (start + 8, 4);