/*
* [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.baksmali.Adaptors.Format;
import org.jf.baksmali.Adaptors.MethodDefinition;
import org.jf.baksmali.Adaptors.MethodDefinition.InvalidSwitchPayload;
import org.jf.baksmali.Adaptors.MethodItem;
import org.jf.baksmali.Renderers.LongRenderer;
import org.jf.baksmali.baksmaliOptions;
import org.jf.dexlib2.Opcode;
import org.jf.dexlib2.ReferenceType;
import org.jf.dexlib2.VerificationError;
import org.jf.dexlib2.dexbacked.DexBackedDexFile.InvalidItemIndex;
import org.jf.dexlib2.iface.instruction.*;
import org.jf.dexlib2.iface.instruction.formats.Instruction20bc;
import org.jf.dexlib2.iface.instruction.formats.Instruction31t;
import org.jf.dexlib2.iface.instruction.formats.UnknownInstruction;
import org.jf.dexlib2.iface.reference.FieldReference;
import org.jf.dexlib2.iface.reference.MethodReference;
import org.jf.dexlib2.iface.reference.Reference;
import org.jf.dexlib2.util.ReferenceUtil;
import org.jf.util.ExceptionWithContext;
import org.jf.util.IndentingWriter;
import org.jf.util.NumberUtils;
import javax.annotation.Nonnull;
import java.io.IOException;
import java.util.Map;
public class InstructionMethodItem<T extends Instruction> extends MethodItem {
@Nonnull protected final MethodDefinition methodDef;
@Nonnull protected final T instruction;
public InstructionMethodItem(@Nonnull MethodDefinition methodDef, int codeAddress, @Nonnull T instruction) {
super(codeAddress);
this.methodDef = methodDef;
this.instruction = instruction;
}
public double getSortOrder() {
//instructions should appear after everything except an "end try" label and .catch directive
return 100;
}
private boolean isAllowedOdex(@Nonnull Opcode opcode) {
baksmaliOptions options = methodDef.classDef.options;
if (options.allowOdex) {
return true;
}
if (methodDef.classDef.options.apiLevel >= 14) {
return false;
}
return opcode.isOdexedInstanceVolatile() || opcode.isOdexedStaticVolatile() ||
opcode == Opcode.THROW_VERIFICATION_ERROR;
}
@Override
public boolean writeTo(IndentingWriter writer) throws IOException {
Opcode opcode = instruction.getOpcode();
String verificationErrorName = null;
String referenceString = null;
boolean commentOutInstruction = false;
if (instruction instanceof Instruction20bc) {
int verificationError = ((Instruction20bc)instruction).getVerificationError();
verificationErrorName = VerificationError.getVerificationErrorName(verificationError);
if (verificationErrorName == null) {
writer.write("#was invalid verification error type: ");
writer.printSignedIntAsDec(verificationError);
writer.write("\n");
verificationErrorName = "generic-error";
}
}
if (instruction instanceof ReferenceInstruction) {
ReferenceInstruction referenceInstruction = (ReferenceInstruction)instruction;
try {
Reference reference = referenceInstruction.getReference();
String classContext = null;
if (methodDef.classDef.options.useImplicitReferences) {
classContext = methodDef.method.getDefiningClass();
}
referenceString = ReferenceUtil.getReferenceString(reference, classContext);
assert referenceString != null;
} catch (InvalidItemIndex ex) {
writer.write("#");
writer.write(ex.getMessage());
writer.write("\n");
commentOutInstruction = true;
referenceString = String.format("%s@%d",
ReferenceType.toString(referenceInstruction.getReferenceType()),
ex.getInvalidIndex());
} catch (ReferenceType.InvalidReferenceTypeException ex) {
writer.write("#invalid reference type: ");
writer.printSignedIntAsDec(ex.getReferenceType());
commentOutInstruction = true;
referenceString = "invalid_reference";
}
}
if (instruction instanceof Instruction31t) {
Opcode payloadOpcode;
switch (instruction.getOpcode()) {
case PACKED_SWITCH:
payloadOpcode = Opcode.PACKED_SWITCH_PAYLOAD;
break;
case SPARSE_SWITCH:
payloadOpcode = Opcode.SPARSE_SWITCH_PAYLOAD;
break;
case FILL_ARRAY_DATA:
payloadOpcode = Opcode.ARRAY_PAYLOAD;
break;
default:
throw new ExceptionWithContext("Invalid 31t opcode: %s", instruction.getOpcode());
}
try {
methodDef.findSwitchPayload(this.codeAddress + ((Instruction31t)instruction).getCodeOffset(),
payloadOpcode);
} catch (InvalidSwitchPayload ex) {
writer.write("#invalid payload reference");
commentOutInstruction = true;
}
}
if (opcode.odexOnly()) {
if (!isAllowedOdex(opcode)) {
writer.write("#disallowed odex opcode\n");
commentOutInstruction = true;
}
}
if (commentOutInstruction) {
writer.write("#");
}
switch (instruction.getOpcode().format) {
case Format10t:
writeOpcode(writer);
writer.write(' ');
writeTargetLabel(writer);
break;
case Format10x:
if (instruction instanceof UnknownInstruction) {
writer.write("#unknown opcode: 0x");
writer.printUnsignedLongAsHex(((UnknownInstruction)instruction).getOriginalOpcode());
writer.write('\n');
}
writeOpcode(writer);
break;
case Format11n:
writeOpcode(writer);
writer.write(' ');
writeFirstRegister(writer);
writer.write(", ");
writeLiteral(writer);
break;
case Format11x:
writeOpcode(writer);
writer.write(' ');
writeFirstRegister(writer);
break;
case Format12x:
writeOpcode(writer);
writer.write(' ');
writeFirstRegister(writer);
writer.write(", ");
writeSecondRegister(writer);
break;
case Format20bc:
writeOpcode(writer);
writer.write(' ');
writer.write(verificationErrorName);
writer.write(", ");
writer.write(referenceString);
break;
case Format20t:
case Format30t:
writeOpcode(writer);
writer.write(' ');
writeTargetLabel(writer);
break;
case Format21c:
case Format31c:
writeOpcode(writer);
writer.write(' ');
writeFirstRegister(writer);
writer.write(", ");
writer.write(referenceString);
break;
case Format21ih:
case Format21lh:
case Format21s:
case Format31i:
case Format51l:
writeOpcode(writer);
writer.write(' ');
writeFirstRegister(writer);
writer.write(", ");
writeLiteral(writer);
if (instruction.getOpcode().setsWideRegister()) {
writeCommentIfLikelyDouble(writer);
} else {
boolean isResourceId = writeCommentIfResourceId(writer);
if (!isResourceId) writeCommentIfLikelyFloat(writer);
}
break;
case Format21t:
case Format31t:
writeOpcode(writer);
writer.write(' ');
writeFirstRegister(writer);
writer.write(", ");
writeTargetLabel(writer);
break;
case Format22b:
case Format22s:
writeOpcode(writer);
writer.write(' ');
writeFirstRegister(writer);
writer.write(", ");
writeSecondRegister(writer);
writer.write(", ");
writeLiteral(writer);
break;
case Format22c:
writeOpcode(writer);
writer.write(' ');
writeFirstRegister(writer);
writer.write(", ");
writeSecondRegister(writer);
writer.write(", ");
writer.write(referenceString);
break;
case Format22cs:
writeOpcode(writer);
writer.write(' ');
writeFirstRegister(writer);
writer.write(", ");
writeSecondRegister(writer);
writer.write(", ");
writeFieldOffset(writer);
break;
case Format22t:
writeOpcode(writer);
writer.write(' ');
writeFirstRegister(writer);
writer.write(", ");
writeSecondRegister(writer);
writer.write(", ");
writeTargetLabel(writer);
break;
case Format22x:
case Format32x:
writeOpcode(writer);
writer.write(' ');
writeFirstRegister(writer);
writer.write(", ");
writeSecondRegister(writer);
break;
case Format23x:
writeOpcode(writer);
writer.write(' ');
writeFirstRegister(writer);
writer.write(", ");
writeSecondRegister(writer);
writer.write(", ");
writeThirdRegister(writer);
break;
case Format35c:
writeOpcode(writer);
writer.write(' ');
writeInvokeRegisters(writer);
writer.write(", ");
writer.write(referenceString);
break;
case Format35mi:
writeOpcode(writer);
writer.write(' ');
writeInvokeRegisters(writer);
writer.write(", ");
writeInlineIndex(writer);
break;
case Format35ms:
writeOpcode(writer);
writer.write(' ');
writeInvokeRegisters(writer);
writer.write(", ");
writeVtableIndex(writer);
break;
case Format3rc:
writeOpcode(writer);
writer.write(' ');
writeInvokeRangeRegisters(writer);
writer.write(", ");
writer.write(referenceString);
break;
case Format3rmi:
writeOpcode(writer);
writer.write(' ');
writeInvokeRangeRegisters(writer);
writer.write(", ");
writeInlineIndex(writer);
break;
case Format3rms:
writeOpcode(writer);
writer.write(' ');
writeInvokeRangeRegisters(writer);
writer.write(", ");
writeVtableIndex(writer);
break;
default:
assert false;
return false;
}
if (commentOutInstruction) {
writer.write("\nnop");
}
return true;
}
protected void writeOpcode(IndentingWriter writer) throws IOException {
writer.write(instruction.getOpcode().name);
}
protected void writeTargetLabel(IndentingWriter writer) throws IOException {
//this method is overridden by OffsetInstructionMethodItem, and should only be called for the formats that
//have a target
throw new RuntimeException();
}
protected void writeRegister(IndentingWriter writer, int registerNumber) throws IOException {
methodDef.registerFormatter.writeTo(writer, registerNumber);
}
protected void writeFirstRegister(IndentingWriter writer) throws IOException {
writeRegister(writer, ((OneRegisterInstruction)instruction).getRegisterA());
}
protected void writeSecondRegister(IndentingWriter writer) throws IOException {
writeRegister(writer, ((TwoRegisterInstruction)instruction).getRegisterB());
}
protected void writeThirdRegister(IndentingWriter writer) throws IOException {
writeRegister(writer, ((ThreeRegisterInstruction) instruction).getRegisterC());
}
protected void writeInvokeRegisters(IndentingWriter writer) throws IOException {
FiveRegisterInstruction instruction = (FiveRegisterInstruction)this.instruction;
final int regCount = instruction.getRegisterCount();
writer.write('{');
switch (regCount) {
case 1:
writeRegister(writer, instruction.getRegisterC());
break;
case 2:
writeRegister(writer, instruction.getRegisterC());
writer.write(", ");
writeRegister(writer, instruction.getRegisterD());
break;
case 3:
writeRegister(writer, instruction.getRegisterC());
writer.write(", ");
writeRegister(writer, instruction.getRegisterD());
writer.write(", ");
writeRegister(writer, instruction.getRegisterE());
break;
case 4:
writeRegister(writer, instruction.getRegisterC());
writer.write(", ");
writeRegister(writer, instruction.getRegisterD());
writer.write(", ");
writeRegister(writer, instruction.getRegisterE());
writer.write(", ");
writeRegister(writer, instruction.getRegisterF());
break;
case 5:
writeRegister(writer, instruction.getRegisterC());
writer.write(", ");
writeRegister(writer, instruction.getRegisterD());
writer.write(", ");
writeRegister(writer, instruction.getRegisterE());
writer.write(", ");
writeRegister(writer, instruction.getRegisterF());
writer.write(", ");
writeRegister(writer, instruction.getRegisterG());
break;
}
writer.write('}');
}
protected void writeInvokeRangeRegisters(IndentingWriter writer) throws IOException {
RegisterRangeInstruction instruction = (RegisterRangeInstruction)this.instruction;
int regCount = instruction.getRegisterCount();
if (regCount == 0) {
writer.write("{}");
} else {
int startRegister = instruction.getStartRegister();
methodDef.registerFormatter.writeRegisterRange(writer, startRegister, startRegister+regCount-1);
}
}
protected void writeLiteral(IndentingWriter writer) throws IOException {
LongRenderer.writeSignedIntOrLongTo(writer, ((WideLiteralInstruction)instruction).getWideLiteral());
}
protected void writeCommentIfLikelyFloat(IndentingWriter writer) throws IOException {
writeCommentIfLikelyFloat(writer, ((NarrowLiteralInstruction)instruction).getNarrowLiteral());
}
protected void writeCommentIfLikelyFloat(IndentingWriter writer, int val) throws IOException {
if (NumberUtils.isLikelyFloat(val)) {
writer.write(" # ");
float fval = Float.intBitsToFloat(val);
if (fval == Float.POSITIVE_INFINITY)
writer.write("Float.POSITIVE_INFINITY");
else if (fval == Float.NEGATIVE_INFINITY)
writer.write("Float.NEGATIVE_INFINITY");
else if (fval == Float.NaN)
writer.write("Float.NaN");
else if (fval == Float.MAX_VALUE)
writer.write("Float.MAX_VALUE");
else if (fval == (float)Math.PI)
writer.write("(float)Math.PI");
else if (fval == (float)Math.E)
writer.write("(float)Math.E");
else {
writer.write(Float.toString(fval));
writer.write('f');
}
}
}
protected void writeCommentIfLikelyDouble(IndentingWriter writer) throws IOException {
writeCommentIfLikelyDouble(writer, ((WideLiteralInstruction)instruction).getWideLiteral());
}
protected void writeCommentIfLikelyDouble(IndentingWriter writer, long val) throws IOException {
if (NumberUtils.isLikelyDouble(val)) {
writer.write(" # ");
double dval = Double.longBitsToDouble(val);
if (dval == Double.POSITIVE_INFINITY)
writer.write("Double.POSITIVE_INFINITY");
else if (dval == Double.NEGATIVE_INFINITY)
writer.write("Double.NEGATIVE_INFINITY");
else if (dval == Double.NaN)
writer.write("Double.NaN");
else if (dval == Double.MAX_VALUE)
writer.write("Double.MAX_VALUE");
else if (dval == Math.PI)
writer.write("Math.PI");
else if (dval == Math.E)
writer.write("Math.E");
else
writer.write(Double.toString(dval));
}
}
protected boolean writeCommentIfResourceId(IndentingWriter writer) throws IOException {
return writeCommentIfResourceId(writer, ((NarrowLiteralInstruction)instruction).getNarrowLiteral());
}
protected boolean writeCommentIfResourceId(IndentingWriter writer, int val) throws IOException {
Map<Integer,String> resourceIds = methodDef.classDef.options.resourceIds;
String resource = resourceIds.get(Integer.valueOf(val));
if (resource != null) {
writer.write(" # ");
writer.write(resource);
return true;
}
return false;
}
protected void writeFieldOffset(IndentingWriter writer) throws IOException {
writer.write("field@0x");
writer.printUnsignedLongAsHex(((FieldOffsetInstruction)instruction).getFieldOffset());
}
protected void writeInlineIndex(IndentingWriter writer) throws IOException {
writer.write("inline@");
writer.printSignedIntAsDec(((InlineIndexInstruction)instruction).getInlineIndex());
}
protected void writeVtableIndex(IndentingWriter writer) throws IOException {
writer.write("vtable@");
writer.printSignedIntAsDec(((VtableIndexInstruction)instruction).getVtableIndex());
}
}