| /* |
| * [The "BSD licence"] |
| * Copyright (c) 2010 Ben Gruver (JesusFreke) |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.jf.dexlib.Code; |
| |
| import org.jf.dexlib.Code.Format.*; |
| import org.jf.dexlib.DexFile; |
| import org.jf.dexlib.Util.ExceptionWithContext; |
| import org.jf.dexlib.Util.Hex; |
| |
| public class InstructionIterator { |
| public static void IterateInstructions(DexFile dexFile, byte[] insns, ProcessInstructionDelegate delegate) { |
| int insnsPosition = 0; |
| |
| while (insnsPosition < insns.length) { |
| try |
| { |
| short opcodeValue = (short)(insns[insnsPosition] & 0xFF); |
| if (opcodeValue == 0xFF) { |
| opcodeValue = (short)((0xFF << 8) | insns[insnsPosition+1]); |
| } |
| |
| Opcode opcode = Opcode.getOpcodeByValue(opcodeValue); |
| |
| Instruction instruction = null; |
| |
| if (opcode == null) { |
| System.err.println(String.format("unknown opcode encountered - %x. Treating as nop.", |
| (opcodeValue & 0xFFFF))); |
| instruction = new UnknownInstruction(opcodeValue); |
| } else { |
| if (opcode == Opcode.NOP) { |
| byte secondByte = insns[insnsPosition + 1]; |
| switch (secondByte) { |
| case 0: |
| { |
| instruction = new Instruction10x(Opcode.NOP, insns, insnsPosition); |
| break; |
| } |
| case 1: |
| { |
| instruction = new PackedSwitchDataPseudoInstruction(insns, insnsPosition); |
| break; |
| } |
| case 2: |
| { |
| instruction = new SparseSwitchDataPseudoInstruction(insns, insnsPosition); |
| break; |
| } |
| case 3: |
| { |
| instruction = new ArrayDataPseudoInstruction(insns, insnsPosition); |
| break; |
| } |
| } |
| } else { |
| instruction = opcode.format.Factory.makeInstruction(dexFile, opcode, insns, insnsPosition); |
| } |
| } |
| |
| assert instruction != null; |
| |
| delegate.ProcessInstruction(insnsPosition/2, instruction); |
| insnsPosition += instruction.getSize(insnsPosition/2)*2; |
| } catch (Exception ex) { |
| throw ExceptionWithContext.withContext(ex, "Error occured at code address " + insnsPosition * 2); |
| } |
| } |
| } |
| |
| public static interface ProcessInstructionDelegate { |
| public void ProcessInstruction(int codeAddress, Instruction instruction); |
| } |
| } |