OffsetInstructionFormatMethodItem.java revision 6eae34831fee1f116f3a453bdc5e143d68e05e03
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.baksmali.Adaptors.Format; 30 31import org.jf.baksmali.IndentingPrintWriter; 32import org.jf.dexlib.Code.Opcode; 33import org.jf.dexlib.CodeItem; 34import org.jf.dexlib.Code.Instruction; 35import org.jf.dexlib.Code.OffsetInstruction; 36import org.jf.baksmali.Adaptors.LabelMethodItem; 37import org.jf.baksmali.Adaptors.MethodDefinition; 38 39import java.io.IOException; 40 41public class OffsetInstructionFormatMethodItem<T extends Instruction & OffsetInstruction> 42 extends InstructionMethodItem<T> { 43 protected LabelMethodItem label; 44 45 public OffsetInstructionFormatMethodItem(MethodDefinition.LabelCache labelCache, CodeItem codeItem, int codeAddress, 46 T instruction) { 47 super(codeItem, codeAddress, instruction); 48 49 label = new LabelMethodItem(codeAddress + instruction.getTargetAddressOffset(), getLabelPrefix()); 50 label = labelCache.internLabel(label); 51 label.setUncommented(); 52 } 53 54 @Override 55 protected void writeTargetLabel(IndentingPrintWriter writer) throws IOException { 56 label.writeTo(writer); 57 } 58 59 public LabelMethodItem getLabel() { 60 return label; 61 } 62 63 private String getLabelPrefix() { 64 switch (instruction.getFormat()) { 65 case Format10t: 66 case Format20t: 67 case Format30t: 68 return "goto_"; 69 case Format21t: 70 case Format22t: 71 return "cond_"; 72 case Format31t: 73 if (instruction.opcode == Opcode.FILL_ARRAY_DATA) { 74 return "array_"; 75 } 76 if (instruction.opcode == Opcode.PACKED_SWITCH) { 77 return "pswitch_data_"; 78 } 79 assert instruction.opcode == Opcode.SPARSE_SWITCH; 80 return "sswitch_data_"; 81 } 82 83 assert false; 84 return null; 85 } 86} 87