1 /*
 2  * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
 3  * Copyright (c) 2023 IBM Corp. All rights reserved.
 4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 5  *
 6  * This code is free software; you can redistribute it and/or modify it
 7  * under the terms of the GNU General Public License version 2 only, as
 8  * published by the Free Software Foundation.  Oracle designates this
 9  * particular file as subject to the "Classpath" exception as provided
10  * by Oracle in the LICENSE file that accompanied this code.
11  *
12  * This code is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15  * version 2 for more details (a copy is included in the LICENSE file that
16  * accompanied this code).
17  *
18  * You should have received a copy of the GNU General Public License version
19  * 2 along with this work; if not, write to the Free Software Foundation,
20  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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25  */
26 package jdk.internal.foreign.abi.s390.linux;
27 
28 import jdk.internal.foreign.abi.AbstractLinker;
29 import jdk.internal.foreign.abi.LinkerOptions;
30 import jdk.internal.foreign.abi.SharedUtils;
31 
32 import java.lang.foreign.FunctionDescriptor;
33 import java.lang.foreign.MemoryLayout;
34 import java.lang.foreign.ValueLayout;
35 import java.lang.invoke.MethodHandle;
36 import java.lang.invoke.MethodType;
37 import java.nio.ByteOrder;
38 import java.util.Map;
39 
40 public final class LinuxS390Linker extends AbstractLinker {
41 
42     private static final Map<String, MemoryLayout> CANONICAL_LAYOUTS =
43             SharedUtils.canonicalLayouts(ValueLayout.JAVA_LONG, ValueLayout.JAVA_LONG, ValueLayout.JAVA_INT);
44 
45     public static LinuxS390Linker getInstance() {
46         final class Holder {
47             private static final LinuxS390Linker INSTANCE = new LinuxS390Linker();
48         }
49 
50         return Holder.INSTANCE;
51     }
52 
53     private LinuxS390Linker() {
54         // Ensure there is only one instance
55     }
56 
57     @Override
58     protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
59         return LinuxS390CallArranger.arrangeDowncall(inferredMethodType, function, options);
60     }
61 
62     @Override
63     protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
64         return LinuxS390CallArranger.arrangeUpcall(targetType, function, options);
65     }
66 
67     @Override
68     protected ByteOrder linkerByteOrder() {
69         return ByteOrder.BIG_ENDIAN;
70     }
71 
72     @Override
73     public Map<String, MemoryLayout> canonicalLayouts() {
74         return CANONICAL_LAYOUTS;
75     }
76 }