static SGetOp create(Instruction instruction, int address, VirtualMachine vm) {
String opName = instruction.getOpcode().name;
int childAddress = address + instruction.getCodeUnits();
Instruction21c instr = (Instruction21c) instruction;
int destRegister = instr.getRegisterA();
FieldReference reference = (FieldReference) instr.getReference();
String fieldDescriptor = ReferenceUtil.getFieldDescriptor(reference);
return new SGetOp(address, opName, childAddress, destRegister, fieldDescriptor, vm);
}
@Override
public void computeDataOffsets(DexBody body) {
Debug.printDbg("compute data offset");
if (!(instruction instanceof Instruction31t))
throw new IllegalArgumentException(
"Expected Instruction31t but got: " + instruction.getClass());
Instruction31t fillArrayInstr = (Instruction31t) instruction;
int offset = fillArrayInstr.getCodeOffset();
int targetAddress = codeAddress + offset;
Instruction referenceTable = body.instructionAtAddress(targetAddress).instruction;
if (!(referenceTable instanceof ArrayPayload)) {
throw new RuntimeException(
"Address 0x"
+ Integer.toHexString(targetAddress)
+ " refers to an invalid PseudoInstruction ("
+ referenceTable.getClass()
+ ").");
}
ArrayPayload arrayTable = (ArrayPayload) referenceTable;
int numElements = arrayTable.getArrayElements().size();
int widthElement = arrayTable.getElementWidth();
int size = (widthElement * numElements) / 2; // addresses are on 16bits
// From org.jf.dexlib.Code.Format.ArrayDataPseudoInstruction we learn
// that there are 6 bytes after the magic number that we have to jump.
// 6 bytes to jump = address + 3
//
// out.writeByte(0x00); // magic
// out.writeByte(0x03); // number
// out.writeShort(elementWidth); // 2 bytes
// out.writeInt(elementCount); // 4 bytes
// out.write(encodedValues);
//
setDataFirstByte(targetAddress + 3); // address for 16 bits elements not 8 bits
setDataLastByte(targetAddress + 3 + size); // - 1);
setDataSize(size);
// TODO: how to handle this with dexlib2 ?
// ByteArrayAnnotatedOutput out = new ByteArrayAnnotatedOutput();
// arrayTable.write(out, targetAddress);
//
// byte[] outa = out.getArray();
// byte[] data = new byte[outa.length-6];
// for (int i=6; i<outa.length; i++) {
// data[i-6] = outa[i];
// }
// setData (data);
}
protected boolean isInvokeInit() {
if (instruction == null || !instruction.getOpcode().canInitializeReference()) {
return false;
}
ReferenceInstruction instruction = (ReferenceInstruction) this.instruction;
Reference reference = instruction.getReference();
if (reference instanceof MethodReference) {
return ((MethodReference) reference).getName().equals("<init>");
}
return false;
}
public boolean setsWideRegister() {
return instruction.getOpcode().setsWideRegister();
}
protected void restoreOdexedInstruction() {
assert originalInstruction.getOpcode().odexOnly();
instruction = originalInstruction;
}
protected void setDeodexedInstruction(Instruction instruction) {
assert originalInstruction.getOpcode().odexOnly();
this.instruction = instruction;
}