Modify_Firmware.md

Modify

You need a Linux PC/VM, Ubuntu as Operating System

Prerequisite

You need these program installed:

• tar (extract tar package)
• squashfs-tools (extract/repack rootfs)
• qemu-user-static (run MIPS VM)

Extract firmware

• Extract Firmware package in tar format, we need rootfs file
• Extract rootfs partition

unsquashfs rootfs

Repack firmware

• Repack rootfs

mksquashfs squashfs-root rootfs.new -b 131072 -comp lzma

• Rename rootfs

mv rootfs rootfs.old
mv rootfs.new rootfs

• Update md5sum

md5sum fwu.sh rootfs uImage fwu_ver > md5.txt

• tar current folder

tar -cvf ../firmware.tar *