commit 9b44a3a57d17ea2d35823780007a38daeeaec6a4
Author: Andreas Arnez <arnez@linux.vnet.ibm.com>
Date:   Tue May 13 14:55:53 2014 +0200

    S390: Fix erroneous offset in fill_gregset.
    
    This fixes a bug that leads to various failures when debugging a
    31-bit inferior with a 64-bit gdb on s390x.

Index: gdb-7.6.1/gdb/s390-nat.c
===================================================================
--- gdb-7.6.1.orig/gdb/s390-nat.c
+++ gdb-7.6.1/gdb/s390-nat.c
@@ -167,7 +167,7 @@ fill_gregset (const struct regcache *reg
 		  memset (p, 0, 4);
 		  p += 4;
 		}
-	      regcache_raw_collect (regcache, reg, p + 4);
+	      regcache_raw_collect (regcache, reg, p);
 	    }
 	}