xiaomi-dafang-hacks/hacks/howto_modfirmware.md

Unpack Firmware

Use unpacker.py with the firmware:

./unpacker.py demo_5.5.1.194.bin

Pack Firmware

Install requirements

sudo apt-get install u-boot-tools

Use packer.py with the firmware files:

./packer.py kernel.bin rootfs.bin driver.bin appfs.bin new_firmware.bin

File Formats used

Name	Format
uboot.bin	Uboot-Binary
kernel.bin	Kernel Image
rootfs.bin	SquashFS
driver.bin	SquashFS
appfs.bin	JFFS2
backupk.bin	Backup Kernel
backupd.bin	Backup Driver
backupa.bin	Backup Appfs
config.bin	JFFS2
para.bin	JFFS2
flag.bin	Textfile

Extract Kernel:

The Kernel is compressed using lzma. Use the following Instructions for extracting it: https://stackoverflow.com/questions/37672417/getting-kernel-version-from-the-compressed-kernel-image

Extract JFFS2:

Use following Tutorial: http://wiki.emacinc.com/wiki/Mounting_JFFS2_Images_on_a_Linux_PC

Extract SquashFS

https://unix.stackexchange.com/questions/80305/mounting-a-squashfs-filesystem-in-read-write