--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/os_cpu/linux_arm/vm/vm_version_linux_arm_32.cpp Mon Dec 19 12:39:01 2016 -0500
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "runtime/os.hpp"
+#include "vm_version_arm.hpp"
+
+# include <sys/utsname.h>
+
+// Use uname() to find the architecture version
+void VM_Version::get_os_cpu_info() {
+ struct utsname name;
+ static bool done = false;
+
+ // Support for multiple calls in the init phase
+ if (done) return;
+ done = true;
+
+ uname(&name);
+ if (strncmp(name.machine, "aarch64", 7) == 0) {
+ _arm_arch = 8;
+ } else if (strncmp(name.machine, "armv", 4) == 0 &&
+ name.machine[4] >= '5' && name.machine[4] <= '9') {
+ _arm_arch = (int)(name.machine[4] - '0');
+ }
+}
+
+// Make sure that _arm_arch is initialized so that any calls to OrderAccess will
+// use proper dmb instruction
+void VM_Version::early_initialize() {
+ get_os_cpu_info();
+}