Examples with LMul net.runelite.asm.attributes.code.instructions.LMul used on opensource projects

Example 6 with LMul

use of net.runelite.asm.attributes.code.instructions.LMul in project runelite by runelite.

the class MultiplyOneDeobfuscator method visit.

private void visit(MethodContext mctx) {
    for (InstructionContext ictx : mctx.getInstructionContexts()) {
        Instruction instruction = ictx.getInstruction();
        if (!(instruction instanceof IMul) && !(instruction instanceof LMul)) {
            continue;
        }
        Instructions ins = ictx.getInstruction().getInstructions();
        if (ins == null) {
            continue;
        }
        List<Instruction> ilist = ins.getInstructions();
        if (!ilist.contains(ictx.getInstruction())) {
            // already done
            continue;
        }
        StackContext one = ictx.getPops().get(0);
        StackContext two = ictx.getPops().get(1);
        StackContext other = null;
        int removeIdx = -1;
        if (one.getPushed().getInstruction() instanceof PushConstantInstruction && DMath.equals((Number) ((PushConstantInstruction) one.getPushed().getInstruction()).getConstant(), 1)) {
            removeIdx = 0;
            other = two;
        } else if (two.getPushed().getInstruction() instanceof PushConstantInstruction && DMath.equals((Number) ((PushConstantInstruction) two.getPushed().getInstruction()).getConstant(), 1)) {
            removeIdx = 1;
            other = one;
        }
        if (removeIdx == -1) {
            continue;
        }
        if (onlyConstants && !(other.getPushed().getInstruction() instanceof PushConstantInstruction)) {
            continue;
        }
        if (!MultiplicationDeobfuscator.isOnlyPath(ictx, removeIdx == 0 ? one : two)) {
            continue;
        }
        // remove 1
        ictx.removeStack(removeIdx);
        // remove mul
        ins.remove(instruction);
        ++count;
    }
}

Example 7 with LMul

use of net.runelite.asm.attributes.code.instructions.LMul in project runelite by runelite.

the class MultiplyZeroDeobfuscator method visit.

private void visit(MethodContext mctx) {
    for (InstructionContext ictx : mctx.getInstructionContexts()) {
        Instruction instruction = ictx.getInstruction();
        Instructions ins = instruction.getInstructions();
        if (ins == null) {
            continue;
        }
        if (!(instruction instanceof IMul) && !(instruction instanceof LMul)) {
            continue;
        }
        List<Instruction> ilist = ins.getInstructions();
        StackContext one = ictx.getPops().get(0);
        StackContext two = ictx.getPops().get(1);
        Instruction ione = one.getPushed().getInstruction(), itwo = two.getPushed().getInstruction();
        boolean remove = false;
        if (ione instanceof PushConstantInstruction) {
            PushConstantInstruction pci = (PushConstantInstruction) ione;
            Number value = (Number) pci.getConstant();
            if (DMath.equals(value, 0)) {
                remove = true;
            }
        }
        if (itwo instanceof PushConstantInstruction) {
            PushConstantInstruction pci = (PushConstantInstruction) itwo;
            Number value = (Number) pci.getConstant();
            if (DMath.equals(value, 0)) {
                remove = true;
            }
        }
        if (remove == false) {
            continue;
        }
        if (!ilist.contains(instruction)) {
            // already done
            continue;
        }
        if (!MultiplicationDeobfuscator.isOnlyPath(ictx, null)) {
            continue;
        }
        // remove both, remove imul, push 0
        ictx.removeStack(1);
        ictx.removeStack(0);
        if (instruction instanceof IMul) {
            ins.replace(instruction, new LDC(ins, 0));
        } else if (instruction instanceof LMul) {
            ins.replace(instruction, new LDC(ins, 0L));
        } else {
            throw new IllegalStateException();
        }
        ++count;
    }
}

Example 8 with LMul

use of net.runelite.asm.attributes.code.instructions.LMul in project runelite by runelite.

the class DupDeobfuscator method visit.

private void visit(InstructionContext i) {
    if (!(i.getInstruction() instanceof DupInstruction)) {
        return;
    }
    DupInstruction di = (DupInstruction) i.getInstruction();
    // stack values being duplicated
    List<StackContext> sctxs = di.getDuplicated(i);
    for (StackContext sctx : sctxs) {
        InstructionContext ic = sctx.getPushed();
        if (ic.getInstruction() instanceof IMul) {
            if (i.getInstruction() instanceof Dup) {
                logger.debug("Dup instruction {} duplicates multiplication result {}", i, ic);
                undup(i);
                ++count;
                return;
            }
            if (i.getInstruction() instanceof Dup_X1) {
                logger.debug("Dup_X1 instruction {} duplicates multiplication result {}", i, ic);
                undup_x1(i);
                ++count;
                return;
            }
            logger.warn("Dup instruction {} pops imul", i);
        } else if (ic.getInstruction() instanceof LMul) {
            if (i.getInstruction() instanceof Dup2_X1) {
                logger.debug("Dup_X2 instruction {} duplicates multiplication result {}", i, ic);
                undup2_x1(i);
                ++count;
                return;
            }
            logger.warn("Dup instruction {} pops lmul", i);
        }
    }
    // find if mul pops anything duplicated
    sctxs = di.getCopies(i);
    for (StackContext sctx : sctxs) {
        for (InstructionContext ic : sctx.getPopped()) {
            if (ic.getInstruction() instanceof IMul) {
                if (i.getInstruction() instanceof Dup) {
                    logger.debug("imul {} pops dup instruction {}", ic, i);
                    undup(i);
                    ++count;
                    return;
                }
                if (i.getInstruction() instanceof Dup_X1) {
                    logger.debug("imul {} pops dup x1 instruction {}", ic, i);
                    undup_x1(i);
                    ++count;
                    return;
                }
                logger.warn("imul pops dup instruction {}", i);
            } else if (ic.getInstruction() instanceof LMul) {
                if (i.getInstruction() instanceof Dup2_X1) {
                    logger.debug("imul {} pops dup2 x1 instruction {}", ic, i);
                    undup2_x1(i);
                    ++count;
                    return;
                }
                logger.warn("lmul pops dup instruction {}", i);
            }
        }
    }
}

Example 9 with LMul

use of net.runelite.asm.attributes.code.instructions.LMul in project runelite by runelite.

the class InjectGetter method injectGetter.

public void injectGetter(ClassFile clazz, java.lang.reflect.Method method, Field field, Number getter) {
    assert clazz.findMethod(method.getName()) == null;
    assert field.isStatic() || field.getClassFile() == clazz;
    Signature sig = new Signature.Builder().setReturnType(Inject.classToType(method.getReturnType())).build();
    Method getterMethod = new Method(clazz, method.getName(), sig);
    getterMethod.setAccessFlags(ACC_PUBLIC);
    // create code
    Code code = new Code(getterMethod);
    getterMethod.setCode(code);
    Instructions instructions = code.getInstructions();
    List<Instruction> ins = instructions.getInstructions();
    if (field.isStatic()) {
        code.setMaxStack(1);
        ins.add(new GetStatic(instructions, field.getPoolField()));
    } else {
        code.setMaxStack(2);
        ins.add(new ALoad(instructions, 0));
        ins.add(new GetField(instructions, field.getPoolField()));
    }
    if (getter != null) {
        code.setMaxStack(2);
        assert getter instanceof Integer || getter instanceof Long;
        if (getter instanceof Integer) {
            ins.add(new LDC(instructions, (int) getter));
            ins.add(new IMul(instructions));
        } else {
            ins.add(new LDC(instructions, (long) getter));
            ins.add(new LMul(instructions));
        }
    }
    InstructionType returnType;
    if (field.getType().isPrimitive() && field.getType().getDimensions() == 0) {
        switch(field.getType().toString()) {
            case "B":
            case "C":
            case "I":
            case "S":
            case "Z":
                returnType = InstructionType.IRETURN;
                break;
            case "D":
                returnType = InstructionType.DRETURN;
                break;
            case "F":
                returnType = InstructionType.FRETURN;
                break;
            case "J":
                returnType = InstructionType.LRETURN;
                break;
            default:
                throw new RuntimeException("Unknown type");
        }
    } else {
        returnType = InstructionType.ARETURN;
    }
    ins.add(new Return(instructions, returnType));
    clazz.addMethod(getterMethod);
    ++injectedGetters;
}

Example 10 with LMul

use of net.runelite.asm.attributes.code.instructions.LMul in project runelite by runelite.

the class InjectSetter method injectSetter.

/**
 * inject a setter into the vanilla classgroup
 *
 * @param targetClass Class where to inject the setter (field's class,
 * or client)
 * @param targetApiClass API targetClass implements, which may have the
 * setter declared
 * @param field Field of vanilla that will be set
 * @param exportedName exported name of field
 * @param setter
 */
public void injectSetter(ClassFile targetClass, Class<?> targetApiClass, Field field, String exportedName, Number setter) {
    java.lang.reflect.Method method = inject.findImportMethodOnApi(targetApiClass, exportedName, true);
    if (method == null) {
        logger.warn("Setter injection for field {} but an API method was not found on {}", exportedName, targetApiClass);
        return;
    }
    if (method.getParameterCount() != 1) {
        logger.warn("Setter {} with not parameter count != 1?", exportedName);
        return;
    }
    logger.info("Injecting setter for {} on {}", exportedName, targetApiClass);
    assert targetClass.findMethod(method.getName()) == null;
    assert field.isStatic() || field.getClassFile() == targetClass;
    Signature sig = new Signature.Builder().setReturnType(Type.VOID).addArgument(Inject.classToType(method.getParameterTypes()[0])).build();
    Method setterMethod = new Method(targetClass, method.getName(), sig);
    setterMethod.setAccessFlags(ACC_PUBLIC);
    targetClass.addMethod(setterMethod);
    ++injectedSetters;
    Code code = new Code(setterMethod);
    setterMethod.setCode(code);
    Instructions instructions = code.getInstructions();
    List<Instruction> ins = instructions.getInstructions();
    // load this
    if (!field.isStatic()) {
        ins.add(new ALoad(instructions, 0));
    }
    // load argument
    Type argumentType = sig.getTypeOfArg(0);
    ins.add(inject.createLoadForTypeIndex(instructions, argumentType, 1));
    // cast argument to field type
    Type fieldType = field.getType();
    if (!argumentType.equals(fieldType)) {
        CheckCast checkCast = new CheckCast(instructions);
        checkCast.setType(fieldType);
        ins.add(checkCast);
    }
    if (setter != null) {
        assert setter instanceof Integer || setter instanceof Long;
        if (setter instanceof Integer) {
            ins.add(new LDC(instructions, (int) setter));
            ins.add(new IMul(instructions));
        } else {
            ins.add(new LDC(instructions, (long) setter));
            ins.add(new LMul(instructions));
        }
    }
    if (field.isStatic()) {
        ins.add(new PutStatic(instructions, field));
    } else {
        ins.add(new PutField(instructions, field));
    }
    ins.add(new VReturn(instructions));
}