Index: dbxread.c
===================================================================
RCS file: /cvs/src/src/gdb/dbxread.c,v
retrieving revision 1.98
diff -u -p -u -r1.98 dbxread.c
--- dbxread.c	1 Oct 2008 16:41:27 -0000	1.98
+++ dbxread.c	13 Dec 2008 18:07:31 -0000
@@ -2597,6 +2597,11 @@ read_ofile_symtab (struct partial_symtab
 
       if (type & N_STAB)
 	{
+	  if (sizeof (nlist.n_value) > 4
+	      && (type == N_LSYM || type == N_PSYM))
+	    /* These are very likely to be 32-bit negative.
+	       Sign-extend them for 64-bit GDB.  */
+	    nlist.n_value = (nlist.n_value ^ 0x80000000) - 0x80000000;
 	  process_one_symbol (type, nlist.n_desc, nlist.n_value,
 			      namestring, section_offsets, objfile);
 	}