1 /*
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 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
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 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.
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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).
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25 package jdk.internal.foreign.abi.x64.sysv;
26 
27 
28 import jdk.internal.foreign.abi.AbstractLinker;
29 import jdk.internal.foreign.abi.LinkerOptions;
30 
31 import java.lang.foreign.FunctionDescriptor;
32 import java.lang.invoke.MethodHandle;
33 import java.lang.invoke.MethodType;
34 import java.nio.ByteOrder;
35 
36 /**
37  * ABI implementation based on System V ABI AMD64 supplement v.0.99.6
38  */
39 public final class SysVx64Linker extends AbstractLinker {
40 
41     public static SysVx64Linker getInstance() {
42         final class Holder {
43             private static final SysVx64Linker INSTANCE = new SysVx64Linker();
44         }
45 
46         return Holder.INSTANCE;
47     }
48 
49     private SysVx64Linker() {
50         // Ensure there is only one instance
51     }
52 
53     @Override
54     protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
55         return CallArranger.arrangeDowncall(inferredMethodType, function, options);
56     }
57 
58     @Override
59     protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
60         return CallArranger.arrangeUpcall(targetType, function, options);
61     }
62 
63     @Override
64     protected ByteOrder linkerByteOrder() {
65         return ByteOrder.LITTLE_ENDIAN;
66     }
67 }