1 /* 2 * Copyright 2011, Google Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 package org.jf.dexlib.Code.Format; 33 34 import org.jf.dexlib.Code.Instruction; 35 import org.jf.dexlib.Code.InstructionWithReference; 36 import org.jf.dexlib.Code.Opcode; 37 import org.jf.dexlib.Code.SingleRegisterInstruction; 38 import org.jf.dexlib.DexFile; 39 import org.jf.dexlib.Item; 40 import org.jf.dexlib.TypeIdItem; 41 import org.jf.dexlib.Util.AnnotatedOutput; 42 import org.jf.dexlib.Util.NumberUtils; 43 44 public class Instruction41c extends InstructionWithJumboReference implements SingleRegisterInstruction { 45 public static final InstructionFactory Factory = new Factory(); 46 private short regA; 47 48 public Instruction41c(Opcode opcode, int regA, Item referencedItem) { 49 super(opcode, referencedItem); 50 51 if (regA >= 1 << 16) { 52 throw new RuntimeException("The register number must be less than v65536"); 53 } 54 55 if (opcode == Opcode.NEW_INSTANCE_JUMBO) { 56 assert referencedItem instanceof TypeIdItem; 57 if (((TypeIdItem)referencedItem).getTypeDescriptor().charAt(0) != 'L') { 58 throw new RuntimeException("Only class references can be used with the new-instance/jumbo opcode"); 59 } 60 } 61 62 this.regA = (short)regA; 63 } 64 65 private Instruction41c(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) { 66 super(dexFile, opcode, buffer, bufferIndex); 67 68 if (opcode == Opcode.NEW_INSTANCE_JUMBO && 69 ((TypeIdItem)this.getReferencedItem()).getTypeDescriptor().charAt(0) != 'L') { 70 71 throw new RuntimeException("Only class references can be used with the new-instance/jumbo opcode"); 72 } 73 74 this.regA = (short)NumberUtils.decodeUnsignedShort(buffer, bufferIndex + 6); 75 } 76 77 protected void writeInstruction(AnnotatedOutput out, int currentCodeAddress) { 78 out.writeByte(0xFF); 79 out.writeByte(opcode.value); 80 out.writeInt(getReferencedItem().getIndex()); 81 out.writeShort(getRegisterA()); 82 } 83 84 public Format getFormat() { 85 return Format.Format41c; 86 } 87 88 public int getRegisterA() { 89 return regA & 0xFFFF; 90 } 91 92 private static class Factory implements InstructionFactory { 93 public Instruction makeInstruction(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) { 94 return new Instruction41c(dexFile, opcode, buffer, bufferIndex); 95 } 96 } 97 } 98