Examples with Variables net.runelite.asm.execution.Variables used on opensource projects

Example 6 with Variables

use of net.runelite.asm.execution.Variables in project runelite by runelite.

the class IInc method execute.

@Override
public InstructionContext execute(Frame frame) {
    InstructionContext ins = new InstructionContext(this, frame);
    Variables var = frame.getVariables();
    VariableContext vctx = var.get(index);
    assert vctx.getType().isStackInt();
    ins.read(vctx);
    Value value = vctx.getValue();
    if (!vctx.getValue().isUnknownOrNull()) {
        int i = (int) vctx.getValue().getValue();
        i += inc;
        value = new Value(i);
    }
    vctx = new VariableContext(ins, Type.INT, value);
    var.set(index, vctx);
    return ins;
}

Example 7 with Variables

use of net.runelite.asm.execution.Variables in project runelite by runelite.

the class LLoad method execute.

@Override
public InstructionContext execute(Frame frame) {
    InstructionContext ins = new InstructionContext(this, frame);
    Stack stack = frame.getStack();
    Variables variables = frame.getVariables();
    VariableContext vctx = variables.get(index);
    assert vctx.getType().equals(Type.LONG);
    ins.read(vctx);
    StackContext ctx = new StackContext(ins, vctx);
    stack.push(ctx);
    ins.push(ctx);
    return ins;
}

Example 8 with Variables

use of net.runelite.asm.execution.Variables in project runelite by runelite.

the class LStore method execute.

@Override
public InstructionContext execute(Frame frame) {
    InstructionContext ins = new InstructionContext(this, frame);
    Stack stack = frame.getStack();
    Variables variables = frame.getVariables();
    StackContext value = stack.pop();
    assert value.getType().equals(Type.LONG);
    ins.pop(value);
    variables.set(index, new VariableContext(ins, value));
    return ins;
}

Example 9 with Variables

use of net.runelite.asm.execution.Variables in project runelite by runelite.

the class MultiplicationDeobfuscator method parseExpression.

public static MultiplicationExpression parseExpression(InstructionContext ctx, Class want) {
    MultiplicationExpression me = new MultiplicationExpression();
    if (ctx.getInstruction() instanceof LVTInstruction) {
        LVTInstruction lvt = (LVTInstruction) ctx.getInstruction();
        // loading a variable
        if (!lvt.store()) {
            // var index
            int idx = lvt.getVariableIndex();
            // variables at time of execution
            Variables vars = ctx.getVariables();
            // get the variable
            VariableContext vctx = vars.get(idx);
            if (// ?
            vctx.getRead().size() == 1) {
                // this is an istore
                InstructionContext storeCtx = vctx.getInstructionWhichStored();
                if (storeCtx.getInstruction() instanceof LVTInstruction) {
                    // invoking funcs can put stuff in lvt
                    LVTInstruction storelvt = (LVTInstruction) storeCtx.getInstruction();
                    if (storelvt instanceof IInc)
                        throw new IllegalStateException();
                    assert storelvt.store();
                    InstructionContext pushed = storeCtx.getPops().get(0).getPushed();
                    return parseExpression(pushed, want);
                }
            }
        }
    }
    if (ctx.getInstruction() instanceof PushConstantInstruction) {
        if (ctx.getInstruction() instanceof BiPush || ctx.getInstruction() instanceof SiPush) {
            throw new IllegalStateException();
        }
        me.instructions.add(ctx);
        return me;
    }
    for (StackContext sctx : ctx.getPops()) {
        if (ctx.getInstruction().getClass() == want) {
            if (!isOnlyPath(ctx, sctx))
                continue;
        }
        InstructionContext i = sctx.getPushed();
        // if this instruction is imul, look at pops
        if (ctx.getInstruction().getClass() == want) {
            if (i.getInstruction() instanceof Swap) {
                logger.debug("Resolving swap");
                Swap swap = (Swap) i.getInstruction();
                sctx = swap.getOriginal(sctx);
                i = sctx.getPushed();
            }
            if (i.getInstruction() instanceof PushConstantInstruction) {
                // bipush/sipush are always not obfuscated
                if (i.getInstruction() instanceof BiPush || i.getInstruction() instanceof SiPush)
                    continue;
                // a constant of imul
                me.instructions.add(i);
            } else if (i.getInstruction().getClass() == want) {
                // chained imul, append to me
                try {
                    MultiplicationExpression other = parseExpression(i, want);
                    if (other.dupmagic != null) {
                        assert me.dupmagic == null;
                        me.dupmagic = other.dupmagic;
                    }
                    me.instructions.addAll(other.instructions);
                    me.dupedInstructions.addAll(other.dupedInstructions);
                    me.subexpressions.addAll(other.subexpressions);
                } catch (IllegalStateException ex) {
                // this is ok? just don't include it?
                }
            } else if (i.getInstruction() instanceof IAdd || i.getInstruction() instanceof ISub || i.getInstruction() instanceof LAdd || i.getInstruction() instanceof LSub) {
                // imul using result of iadd or isub. evaluate expression
                try {
                    MultiplicationExpression other = parseExpression(i, want);
                    assert other.dupmagic == null;
                    // subexpr
                    me.subexpressions.add(other);
                } catch (IllegalStateException ex) {
                    assert me.subexpressions.isEmpty();
                // subexpression is too complex. we can still simplify the top level though
                }
            } else if (i.getInstruction() instanceof DupInstruction) {
                DupInstruction dup = (DupInstruction) i.getInstruction();
                // find other branch of the dup instruction
                // sctx = what dup pushed, find other
                // other side of dup
                StackContext otherCtx = dup.getOtherBranch(sctx);
                // what popped other side of dup. is this right?
                InstructionContext otherCtxI = otherCtx.getPopped().get(0);
                if (otherCtxI.getInstruction().getClass() == want) {
                    // assert otherCtxI.getInstruction() instanceof IMul;
                    // other side of that imul
                    InstructionContext pushConstant = otherCtxI.getPops().get(0).getPushed();
                    assert pushConstant.getInstruction() instanceof LDC;
                    me.dupmagic = pushConstant;
                    // original
                    StackContext orig = dup.getOriginal(sctx);
                    try {
                        MultiplicationExpression other = parseExpression(orig.getPushed(), want);
                        // done to it affect that, too. so multiply it by existing values?
                        if (orig.getPushed().getInstruction() instanceof IAdd || orig.getPushed().getInstruction() instanceof ISub || orig.getPushed().getInstruction() instanceof LAdd || orig.getPushed().getInstruction() instanceof LSub) {
                            me.subexpressions.add(other);
                        } else {
                            assert other.dupmagic == null;
                            me.instructions.addAll(other.instructions);
                            me.dupedInstructions.addAll(other.instructions);
                            me.subexpressions.addAll(other.subexpressions);
                        }
                    } catch (IllegalStateException ex) {
                        assert me.subexpressions.isEmpty();
                    }
                }
            } else if (i.getInstruction() instanceof GetFieldInstruction) {
                me.fieldInstructions.add(i);
            // non constant, ignore
            } else {
            // System.out.println("imul pops something I don't know " + i.getInstruction());
            }
        } else // this is an iadd/sub
        if (ctx.getInstruction() instanceof IAdd || ctx.getInstruction() instanceof ISub || ctx.getInstruction() instanceof LAdd || ctx.getInstruction() instanceof LSub) {
            // parse this side of the add/sub
            MultiplicationExpression other = parseExpression(i, want);
            me.subexpressions.add(other);
        } else {
        // System.out.println(ctx.getInstruction() + " pops something I dont know " + i.getInstruction());
        }
    }
    if (me.instructions.isEmpty() && me.subexpressions.isEmpty())
        throw new IllegalStateException();
    return me;
}

Example 10 with Variables

use of net.runelite.asm.execution.Variables in project runelite by runelite.

the class IfICmpEqTest method testIsSame.

@Test
public void testIsSame() {
    Instructions ins = mock(Instructions.class);
    Frame frame = mock(Frame.class);
    Stack stack = new Stack(42);
    Variables variables = new Variables(42);
    when(frame.getStack()).thenReturn(stack);
    when(frame.getVariables()).thenReturn(variables);
    IfICmpEq ifeq = new IfICmpEq(ins, InstructionType.IF_ICMPEQ);
    InstructionContext ifeqCtx = new InstructionContext(ifeq, frame);
    ifeqCtx.pop(new StackContext(getConstantCtx(ins, 1), INT, new Value(1)));
    ifeqCtx.pop(new StackContext(getConstantCtx(ins, 1), INT, new Value(1)));
    IfNe ifne = new IfNe(ins, InstructionType.IFNE);
    InstructionContext ifneCtx = new InstructionContext(ifne, frame);
    ifneCtx.pop(new StackContext(getConstantCtx(ins, 42), INT, new Value(42)));
    assertTrue(ifeq.isSame(ifeqCtx, ifneCtx));
}