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/*
* [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.Format;
import org.jf.dexlib.Code.Instruction;
import org.jf.dexlib.Code.InstructionWithReference;
import org.jf.dexlib.Code.Opcode;
import org.jf.dexlib.Code.RegisterRangeInstruction;
import org.jf.dexlib.DexFile;
import org.jf.dexlib.Item;
import org.jf.dexlib.MethodIdItem;
import org.jf.dexlib.TypeIdItem;
import org.jf.dexlib.Util.AnnotatedOutput;
import org.jf.dexlib.Util.NumberUtils;
import static org.jf.dexlib.Code.Opcode.*;
public class Instruction3rc extends InstructionWithReference implements RegisterRangeInstruction,
InstructionWithJumboVariant {
public static final Instruction.InstructionFactory Factory = new Factory();
private byte regCount;
private short startReg;
public Instruction3rc(Opcode opcode, short regCount, int startReg, Item referencedItem) {
super(opcode, referencedItem);
if (regCount >= 1 << 8) {
throw new RuntimeException("regCount must be less than 256");
}
if (regCount < 0) {
throw new RuntimeException("regCount cannot be negative");
}
if (startReg >= 1 << 16) {
throw new RuntimeException("The beginning register of the range must be less than 65536");
}
if (startReg < 0) {
throw new RuntimeException("The beginning register of the range cannot be negative");
}
this.regCount = (byte)regCount;
this.startReg = (short)startReg;
checkItem(opcode, referencedItem, regCount);
}
private Instruction3rc(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) {
super(dexFile, opcode, buffer, bufferIndex);
this.regCount = (byte)NumberUtils.decodeUnsignedByte(buffer[bufferIndex + 1]);
this.startReg = (short)NumberUtils.decodeUnsignedShort(buffer, bufferIndex + 4);
checkItem(opcode, getReferencedItem(), getRegCount());
}
protected void writeInstruction(AnnotatedOutput out, int currentCodeAddress) {
if(getReferencedItem().getIndex() > 0xFFFF) {
if (opcode.hasJumboOpcode()) {
throw new RuntimeException(String.format("%s index is too large. Use the %s instruction instead.",
opcode.referenceType.name(), opcode.getJumboOpcode().name));
} else {
throw new RuntimeException(String.format("%s index is too large.", opcode.referenceType.name()));
}
}
out.writeByte(opcode.value);
out.writeByte(regCount);
out.writeShort(this.getReferencedItem().getIndex());
out.writeShort(startReg);
}
public Format getFormat() {
return Format.Format3rc;
}
public int getRegCount() {
return (short)(regCount & 0xFF);
}
public int getStartRegister() {
return startReg & 0xFFFF;
}
private static void checkItem(Opcode opcode, Item item, int regCount) {
if (opcode == FILLED_NEW_ARRAY_RANGE) {
//check data for filled-new-array/range opcode
String type = ((TypeIdItem) item).getTypeDescriptor();
if (type.charAt(0) != '[') {
throw new RuntimeException("The type must be an array type");
}
if (type.charAt(1) == 'J' || type.charAt(1) == 'D') {
throw new RuntimeException("The type cannot be an array of longs or doubles");
}
} else if (opcode.value >= INVOKE_VIRTUAL_RANGE.value && opcode.value <= INVOKE_INTERFACE_RANGE.value ||
opcode == INVOKE_OBJECT_INIT_RANGE) {
//check data for invoke-*/range opcodes
MethodIdItem methodIdItem = (MethodIdItem) item;
int parameterRegisterCount = methodIdItem.getPrototype().getParameterRegisterCount();
if (opcode != INVOKE_STATIC_RANGE) {
parameterRegisterCount++;
}
if (parameterRegisterCount != regCount) {
throw new RuntimeException("regCount does not match the number of arguments of the method");
}
}
}
public Instruction makeJumbo() {
Opcode jumboOpcode = opcode.getJumboOpcode();
if (jumboOpcode == null) {
return null;
}
return new Instruction5rc(jumboOpcode, getRegCount(), getStartRegister(), getReferencedItem());
}
private static class Factory implements Instruction.InstructionFactory {
public Instruction makeInstruction(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) {
return new Instruction3rc(dexFile, opcode, buffer, bufferIndex);
}
}
}
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