#!/bin/bash

function do_patch() {
        if [ -f "/boot/${1}" ]; then
                cp "/boot/${1}" "/boot/${1}_backup"
                perl -pne 's/\x47\xE9362H\x'${2}'\x18/\x47\xE9362H\x'${2}'\x1F/g' < "/boot/${1}_backup" > "/boot/${1}"
                echo "Patched /boot/${1}..."
        fi
}

do_patch start.elf 3C
do_patch start_x.elf 1D