1 /*
2 * Copyright (c) 2008, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "runtime/os.hpp"
27 #include "runtime/vm_version.hpp"
28
29 # include <sys/utsname.h>
30
31 // Use uname() to find the architecture version
get_os_cpu_info()32 void VM_Version::get_os_cpu_info() {
33 struct utsname name;
34 static bool done = false;
35
36 // Support for multiple calls in the init phase
37 if (done) return;
38 done = true;
39
40 uname(&name);
41 if (strncmp(name.machine, "aarch64", 7) == 0) {
42 _arm_arch = 8;
43 } else if (strncmp(name.machine, "armv", 4) == 0 &&
44 name.machine[4] >= '5' && name.machine[4] <= '9') {
45 _arm_arch = (int)(name.machine[4] - '0');
46 }
47 }
48
49