1/* 2 * [The "BSD licence"] 3 * Copyright (c) 2010 Ben Gruver (JesusFreke) 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29package org.jf.dexlib.Code.Format; 30 31import org.jf.dexlib.Code.FiveRegisterInstruction; 32import org.jf.dexlib.Code.Instruction; 33import org.jf.dexlib.Code.InstructionWithReference; 34import org.jf.dexlib.Code.Opcode; 35import org.jf.dexlib.DexFile; 36import org.jf.dexlib.Item; 37import org.jf.dexlib.MethodIdItem; 38import org.jf.dexlib.TypeIdItem; 39import org.jf.dexlib.Util.AnnotatedOutput; 40import org.jf.dexlib.Util.NumberUtils; 41 42import static org.jf.dexlib.Code.Opcode.*; 43 44public class Instruction35s extends InstructionWithReference implements FiveRegisterInstruction { 45 public static final Instruction.InstructionFactory Factory = new Factory(); 46 private byte regCount; 47 private byte regA; 48 private byte regD; 49 private byte regE; 50 private byte regF; 51 private byte regG; 52 53 public Instruction35s(Opcode opcode, int regCount, byte regD, byte regE, byte regF, byte regG, 54 byte regA, Item referencedItem) { 55 super(opcode, referencedItem); 56 57 if (regCount > 5) { 58 throw new RuntimeException("regCount cannot be greater than 5"); 59 } 60 61 if (regD >= 1 << 4 || 62 regE >= 1 << 4 || 63 regF >= 1 << 4 || 64 regG >= 1 << 4 || 65 regA >= 1 << 4) { 66 throw new RuntimeException("All register args must fit in 4 bits"); 67 } 68 69 checkItem(opcode, referencedItem, regCount); 70 71 this.regCount = (byte)regCount; 72 this.regA = regA; 73 this.regD = regD; 74 this.regE = regE; 75 this.regF = regF; 76 this.regG = regG; 77 } 78 79 protected Instruction35s(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) { 80 super(dexFile, opcode, buffer, bufferIndex); 81 82 if (getRegCount() > 5) { 83 throw new RuntimeException("regCount cannot be greater than 5"); 84 } 85 86 checkItem(opcode, getReferencedItem(), getRegCount()); 87 88 this.regCount = NumberUtils.decodeHighUnsignedNibble(buffer[bufferIndex + 1]); 89 this.regA = NumberUtils.decodeLowUnsignedNibble(buffer[bufferIndex + 1]); 90 this.regD = NumberUtils.decodeLowUnsignedNibble(buffer[bufferIndex + 4]); 91 this.regE = NumberUtils.decodeHighUnsignedNibble(buffer[bufferIndex + 4]); 92 this.regF = NumberUtils.decodeLowUnsignedNibble(buffer[bufferIndex + 5]); 93 this.regG = NumberUtils.decodeHighUnsignedNibble(buffer[bufferIndex + 5]); 94 } 95 96 protected void writeInstruction(AnnotatedOutput out, int currentCodeAddress) { 97 out.writeByte(opcode.value); 98 out.writeByte((regCount << 4) | regA); 99 out.writeShort(getReferencedItem().getIndex()); 100 out.writeByte((regE << 4) | regD); 101 out.writeByte((regG << 4) | regF); 102 } 103 104 public Format getFormat() { 105 return Format.Format35s; 106 } 107 108 public byte getRegCount() { 109 return regCount; 110 } 111 112 public byte getRegisterA() { 113 return regA; 114 } 115 116 public byte getRegisterD() { 117 return regD; 118 } 119 120 public byte getRegisterE() { 121 return regE; 122 } 123 124 public byte getRegisterF() { 125 return regF; 126 } 127 128 public byte getRegisterG() { 129 return regG; 130 } 131 132 private static void checkItem(Opcode opcode, Item item, int regCount) { 133 if (opcode == FILLED_NEW_ARRAY) { 134 //check data for filled-new-array opcode 135 String type = ((TypeIdItem) item).getTypeDescriptor(); 136 if (type.charAt(0) != '[') { 137 throw new RuntimeException("The type must be an array type"); 138 } 139 if (type.charAt(1) == 'J' || type.charAt(1) == 'D') { 140 throw new RuntimeException("The type cannot be an array of longs or doubles"); 141 } 142 } else if (opcode.value >= INVOKE_VIRTUAL.value && opcode.value <= INVOKE_INTERFACE.value) { 143 //check data for invoke-* opcodes 144 MethodIdItem methodIdItem = (MethodIdItem) item; 145 int parameterRegisterCount = methodIdItem.getPrototype().getParameterRegisterCount(); 146 if (opcode != INVOKE_STATIC) { 147 parameterRegisterCount++; 148 } 149 if (parameterRegisterCount != regCount) { 150 throw new RuntimeException("regCount does not match the number of arguments of the method"); 151 } 152 } 153 } 154 155 private static class Factory implements Instruction.InstructionFactory { 156 public Instruction makeInstruction(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) { 157 return new Instruction35s(dexFile, opcode, buffer, bufferIndex); 158 } 159 } 160} 161