+2014-08-09 Yao Qi <yao@codesourcery.com>
+
+ * gdb.base/display.exp: Invoke is_address_zero_readable.
+ * gdb.guile/scm-value.exp (test_value_in_inferior): Likewise.
+ * gdb.python/py-value.exp (test_value_in_inferior): Likewise.
+ * gdb.base/hbreak-unmapped.exp: Return if
+ is_address_zero_readable returns true.
+ * gdb.base/signest.exp: Likewise.
+ * gdb.base/signull.exp: Likewise.
+ * gdb.base/sigbpt.exp: Likewise.
+ * gdb.guile/scm-disasm.exp: Do the test if
+ is_address_zero_readable returns false.
+ * gdb.guile/scm-pretty-print.exp (run_lang_tests): Likewise.
+ * gdb.python/py-arch.exp: Likewise.
+ * gdb.python/py-prettyprint.exp (run_lang_tests): Likewise.
+ * lib/gdb.exp (is_address_zero_readable): New proc.
+