Raw bytecode

Targets and code blocks cover almost every patch. When they don't, the app.reseam.patch.dex package gives you methods and classes as objects, instructions as data, and registers as numbers. You can reach it from any target (target.method, target.classDef) or from bytecode.

import app.reseam.patch.dex.Opcode

val method = configureDownloads.method
val index = method.indexOfFirstInstruction { opcode == Opcode.IGET && fieldRef?.fieldType == Type.Int }
    ?: error("no int field read")

method.addInstructions(index) {
    constInt(0, 1)
    returnValue(0)
}

• Method reads instructions and registers, searches them, and edits them: insert, replace, remove, replace the body, grow the register count.
• DexClass lists methods and fields, and adds, removes, or changes them.
• Instructions are records from app.reseam.patch.types (Instruction, MethodRef, FieldRef). Properties such as opcode, regA, methodRef, stringValue, and literal read them.
• The builder in addInstructions { } is named after Dalvik instructions: constInt, constString, invoke*, iget*, if*, goto(label), return*. label(name) marks a branch target.

Here you choose the registers yourself. Indexes you save go stale when code is inserted before them; points don't have that problem.

The reference lists every member.

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