wrap header:

        LOAD_GLOBALS    N (__armor_enter__)     N = length of co_consts
        CALL_FUNCTION   0
        POP_TOP
        SETUP_FINALLY   X (jump to wrap footer) X = size of original byte code

changed original byte code:

        Increase oparg of each absolute jump instruction by the size of wrap header

        Obfuscate original byte code

        ...

wrap footer:

        LOAD_GLOBALS    N + 1 (__armor_exit__)
        CALL_FUNCTION   0
        POP_TOP
        END_FINALLY