--- old/src/os_cpu/bsd_zero/vm/os_bsd_zero.cpp	2014-09-04 12:38:25.994048695 +0400
+++ new/src/os_cpu/bsd_zero/vm/os_bsd_zero.cpp	2014-09-04 12:38:25.906045959 +0400
@@ -465,3 +465,8 @@
 void os::verify_stack_alignment() {
 }
 #endif
+
+int os::extra_bang_size_in_bytes() {
+  // Zero does not require an additional stack bang.
+  return 0;
+}