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/*
* Copyright 2011, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER OR CONTRIBUTORS 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 Instruction5rc extends InstructionWithJumboReference implements RegisterRangeInstruction {
public static final InstructionFactory Factory = new Factory();
private short regCount;
private short startReg;
public Instruction5rc(Opcode opcode, int regCount, int startReg, Item referencedItem) {
super(opcode, referencedItem);
if (regCount >= 1 << 16) {
throw new RuntimeException("regCount must be less than 65536");
}
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 = (short)regCount;
this.startReg = (short)startReg;
checkItem(opcode, referencedItem, regCount);
}
private Instruction5rc(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) {
super(dexFile, opcode, buffer, bufferIndex);
this.regCount = (short)NumberUtils.decodeUnsignedShort(buffer, bufferIndex + 6);
this.startReg = (short)NumberUtils.decodeUnsignedShort(buffer, bufferIndex + 8);
checkItem(opcode, getReferencedItem(), getRegCount());
}
protected void writeInstruction(AnnotatedOutput out, int currentCodeAddress) {
out.writeByte(0xff);
out.writeByte(opcode.value);
out.writeInt(this.getReferencedItem().getIndex());
out.writeShort(regCount);
out.writeShort(startReg);
}
public Format getFormat() {
return Format.Format5rc;
}
public int getRegCount() {
return regCount & 0xFFFF;
}
public int getStartRegister() {
return startReg & 0xFFFF;
}
private static void checkItem(Opcode opcode, Item item, int regCount) {
if (opcode == FILLED_NEW_ARRAY_JUMBO) {
//check data for filled-new-array/jumbo 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_JUMBO.value && opcode.value <= INVOKE_INTERFACE_JUMBO.value ||
opcode == INVOKE_OBJECT_INIT_JUMBO) {
//check data for invoke-*/range opcodes
MethodIdItem methodIdItem = (MethodIdItem) item;
int parameterRegisterCount = methodIdItem.getPrototype().getParameterRegisterCount();
if (opcode != INVOKE_STATIC_JUMBO) {
parameterRegisterCount++;
}
if (parameterRegisterCount != regCount) {
throw new RuntimeException("regCount does not match the number of arguments of the method");
}
}
}
private static class Factory implements InstructionFactory {
public Instruction makeInstruction(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) {
return new Instruction5rc(dexFile, opcode, buffer, bufferIndex);
}
}
}
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