1 /*
2  * Copyright (c) 2016, 2018, 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  *
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20  * or visit www.oracle.com if you need additional information or have any
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22  */
23 
24 
25 
26 package jdk.tools.jaotc;
27 
28 import jdk.tools.jaotc.amd64.AMD64InstructionDecoder;
29 import jdk.tools.jaotc.aarch64.AArch64InstructionDecoder;
30 
31 import jdk.vm.ci.amd64.AMD64;
32 import jdk.vm.ci.aarch64.AArch64;
33 import jdk.vm.ci.code.Architecture;
34 import jdk.vm.ci.code.TargetDescription;
35 
36 public abstract class InstructionDecoder {
37 
getInstructionDecoder(TargetDescription target)38     public static InstructionDecoder getInstructionDecoder(TargetDescription target) {
39         Architecture architecture = target.arch;
40         if (architecture instanceof AMD64) {
41             return new AMD64InstructionDecoder(target);
42         } else if (architecture instanceof AArch64) {
43             return new AArch64InstructionDecoder();
44         } else {
45             throw new InternalError("Unsupported architecture " + architecture);
46         }
47     }
48 
decodePosition(byte[] code, int pcOffset)49     public abstract void decodePosition(byte[] code, int pcOffset);
50 
currentEndOfInstruction()51     public abstract int currentEndOfInstruction();
52 
53 }
54