1 /*
 2  *  Copyright (c) 2020, 2021, 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.  Oracle designates this
 8  *  particular file as subject to the "Classpath" exception as provided
 9  *  by Oracle in the LICENSE file that accompanied this code.
10  *
11  *  This code is distributed in the hope that it will be useful, but WITHOUT
12  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  *  version 2 for more details (a copy is included in the LICENSE file that
15  *  accompanied this code).
16  *
17  *  You should have received a copy of the GNU General Public License version
18  *  2 along with this work; if not, write to the Free Software Foundation,
19  *  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  *   Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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25  */
26 package jdk.internal.foreign;
27 
28 import static jdk.incubator.foreign.ValueLayout.ADDRESS;
29 import static sun.security.action.GetPropertyAction.privilegedGetProperty;
30 
31 public enum CABI {
32     SysV,
33     Win64,
34     LinuxAArch64,
35     MacOsAArch64;
36 
37     private static final CABI current;
38 
39     static {
40         String arch = privilegedGetProperty("os.arch");
41         String os = privilegedGetProperty("os.name");
42         long addressSize = ADDRESS.bitSize();
43         // might be running in a 32-bit VM on a 64-bit platform.
44         // addressSize will be correctly 32
45         if ((arch.equals("amd64") || arch.equals("x86_64")) && addressSize == 64) {
46             if (os.startsWith("Windows")) {
47                 current = Win64;
48             } else {
49                 current = SysV;
50             }
51         } else if (arch.equals("aarch64")) {
52             if (os.startsWith("Mac")) {
53                 current = MacOsAArch64;
54             } else {
55                 // The Linux ABI follows the standard AAPCS ABI
56                 current = LinuxAArch64;
57             }
58         } else {
59             throw new ExceptionInInitializerError(
60                 "Unsupported os, arch, or address size: " + os + ", " + arch + ", " + addressSize);
61         }
62     }
63 
64     public static CABI current() {
65         return current;
66     }
67 }