personal script for generating Android boot image for archlinux ARM

update_boot_image.sh

#!/bin/bash

set -e

_create_boot_image() {
	mkbootimg --kernel /boot/Image.gz-dtb \
	  --ramdisk /boot/initramfs-linux.img \
	  --cmdline "root=/dev/sda15 rw loglevel=5 ${1}" \
	  --base 0x80000000 --kernel_offset 0x00008000 --ramdisk_offset 0x01000000 \
	  --second_offset 0x00f00000 --os_version "11.0.0" --os_patch_level "2022-07" \
	  --tags_offset 0x00000100 --board "" --pagesize 4096 --header_version 0 \
	  --output "${2}"
}

echo -n '=> Updating Image.gz-dtb... '

cat /boot/Image.gz /boot/dtbs/qcom/msm8996pro-xiaomi-scorpio.dtb > /boot/Image.gz-dtb

echo 'OK'

echo -n '=> Updating boot.img... '

_create_boot_image "" /boot/boot.img

echo 'OK'

echo -n '=> Updating boot-rescue.img... '

_create_boot_image "init=/bin/bash" /boot/boot-rescue.img

echo 'OK'

echo 'NOTE: run "dd if=/boot/boot.img of=/dev/sde36" to flash your new boot image.'