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

Example 26 with Instructions

use of net.runelite.asm.attributes.code.Instructions in project runelite by runelite.

the class PacketHandlerOrder method insertPacketLength.

private void insertPacketLength(ClassGroup group, PacketTypeFinder ptf) {
    PacketLengthFinder pfl = new PacketLengthFinder(group, ptf);
    pfl.find();
    GetStatic getArray = pfl.getGetArray();
    // instruction to store packet length
    PutStatic ps = pfl.getStore();
    Instructions instructions = ps.getInstructions();
    List<Instruction> ins = instructions.getInstructions();
    Label getArrayLabel = instructions.createLabelFor(getArray);
    Label storeLabel = instructions.createLabelFor(ps);
    int idx = ins.indexOf(getArray);
    assert idx != -1;
    // to go before label, which must exist
    --idx;
    net.runelite.asm.pool.Field field = new net.runelite.asm.pool.Field(new net.runelite.asm.pool.Class(findClient(group).getName()), RUNELITE_PACKET, Type.BOOLEAN);
    instructions.addInstruction(idx++, new GetStatic(instructions, field));
    instructions.addInstruction(idx++, new IfEq(instructions, getArrayLabel));
    // 2 byte length
    instructions.addInstruction(idx++, new LDC(instructions, -2));
    instructions.addInstruction(idx++, new Goto(instructions, storeLabel));
}

Example 27 with Instructions

use of net.runelite.asm.attributes.code.Instructions in project runelite by runelite.

the class UnreachedCode method removeUnused.

private int removeUnused(Method m) {
    Instructions ins = m.getCode().getInstructions();
    int count = 0;
    List<Instruction> insCopy = new ArrayList<>(ins.getInstructions());
    for (int j = 0; j < insCopy.size(); ++j) {
        Instruction i = insCopy.get(j);
        if (!execution.executed.contains(i)) {
            // if this is an exception handler, the exception handler is never used...
            for (net.runelite.asm.attributes.code.Exception e : new ArrayList<>(m.getCode().getExceptions().getExceptions())) {
                if (e.getStart().next() == i) {
                    e.setStart(ins.createLabelFor(insCopy.get(j + 1)));
                    if (e.getStart().next() == e.getEnd().next()) {
                        m.getCode().getExceptions().remove(e);
                        continue;
                    }
                }
                if (e.getHandler().next() == i) {
                    m.getCode().getExceptions().remove(e);
                }
            }
            if (i instanceof Label)
                continue;
            ins.remove(i);
            ++count;
        }
    }
    return count;
}

Example 28 with Instructions

use of net.runelite.asm.attributes.code.Instructions in project runelite by runelite.

the class DupDeobfuscator method undup2_x1.

private void undup2_x1(InstructionContext ictx) {
    assert ictx.getInstruction() instanceof Dup2_X1;
    // only support this form
    assert ictx.getPops().size() == 2;
    // I L -> L I L
    Instructions instructions = ictx.getInstruction().getInstructions();
    // can't swap a long on the stack, so
    int idx = instructions.getInstructions().indexOf(ictx.getInstruction());
    assert idx != -1;
    // remove dup2_x1
    instructions.remove(ictx.getInstruction());
    // pop long
    instructions.addInstruction(idx++, new Pop2(instructions));
    // pop int
    instructions.addInstruction(idx++, new Pop(instructions));
    // insert copy of long
    idx = copy(ictx.getPops().get(0), instructions, idx);
    // insert copy of int
    idx = copy(ictx.getPops().get(1), instructions, idx);
    // insert copy of long
    /* idx = */
    copy(ictx.getPops().get(0), instructions, idx);
}

Example 29 with Instructions

use of net.runelite.asm.attributes.code.Instructions in project runelite by runelite.

the class DupDeobfuscator method undup_x1.

private void undup_x1(InstructionContext ictx) {
    assert ictx.getInstruction() instanceof Dup_X1;
    Instructions instructions = ictx.getInstruction().getInstructions();
    StackContext duplicated = ictx.getPops().get(0);
    // replace dup_x1 with swap
    int idx = instructions.replace(ictx.getInstruction(), new Swap(instructions));
    // copy imul and insert after idx
    copy(duplicated, instructions, idx + 1);
}

Example 30 with Instructions

use of net.runelite.asm.attributes.code.Instructions in project runelite by runelite.

the class DupDeobfuscator method undup.

private void undup(InstructionContext ictx) {
    assert ictx.getInstruction() instanceof Dup;
    Instructions instructions = ictx.getInstruction().getInstructions();
    StackContext duplicated = ictx.getPops().get(0);
    int idx = instructions.getInstructions().indexOf(ictx.getInstruction());
    assert idx != -1;
    // replace dup with duplicated instructions
    instructions.remove(ictx.getInstruction());
    // insert copy
    copy(duplicated, instructions, idx);
}