This is a very large block size for embedded systems. This will decrease the firmware image size at the cost of additional CPU and RAM resources utilized on the target device. The optional -min switch will use the maximum squashfs block size of 1MB. The optional -nopad switch will instruct build-firmware.sh to NOT pad the firmware up to its original size. The new firmware generated by build-firmware.sh will be located at 'fmk/new-firmware.bin', while old-build.sh will generate firmware images in several different formats and save them in the specified output directory. Usage for both extract-firmware.sh and build-firmware.sh is straight forward: However, old-extract.sh is still included and works with many firmware formats. Currently, extract-firmware.sh is the preferred method of extraction as it supports more firmware types than the older old-extract.sh script. Extracting FirmwareĪutomated firmware extraction typically works with most firmware images that employ uImage/TRX firmware headers and use SquashFS or CramFS file systems.
For now, if you have multiple working directories, we suggest you rename the ones you're not currently operating on. Allowance of alternate working directories is supported for some operations, but not all. The extraction script extracts to this folder, and the rebuild script rebuilds from this folder.
#Sh pull mod#
The Firmware Mod Kit uses a 'hard coded' working directory of 'fmk'. Restores modified Web GUI files to extracted DD-WRT firmware. The core scripts to facilitate firmware operations are listed below.Įxtracts Web GUI files from extracted DD-WRT firmware. The utilities can be used directly, or the shell scripts can be used to automate and combine common firmware operations (e.g. The Firmware Mod Kit is a collection of utilities and shell scripts. Git clone the Firmware Modification Kit repository. With a few small modifications, it should work on other POSIX platforms. The Firmware Mod Kit is only supported on the Linux platform.
#Sh pull install#
Yum install git zlib1g-dev xz-devel python-magic zlib-devel util-linuxįor other distros, you should install the equivalent packages using your distro's package manager. If you are running an linux distro that use apt-get, e.g. In order to use the Firmware Mod Kit, you must have a subversion client, standard Linux development tools (gcc, make, etc), the python-magic module, and the zlib and lzma development packages. While it primarily targets Linux based routers, it should be compatible with most firmware that makes use of common firmware formats and file systems such as TRX/uImage and SquashFS/CramFS. The Firmware Mod Kit allows for easy deconstruction and reconstruction of firmware images for various embedded devices. This kit is only for embedded systems software engineers. The authors of this kit have duly warned you. These include the bricking of your device. Sometimes it just isn't feasible, or would cost more in total recovery cost than the unit is worth.ĭo NOT use this kit if you are not prepared to have your router bricked!ĮULA: By downloading or using this kit, you agree to accept liability for consequences of use or misuse of the Firmware Mod Kit.
#Sh pull serial#
serial or JTAG headers soldered onto the PCB).
#Sh pull mods#
Sometimes it requires hardware mods (e.g. Recovery is sometimes possible without hardware modifications. Brick means to effectively turn into a non-functional 'brick'. WARNING: You are going to brick your device by using this kit (maybe not, but better to say you will). User makes desired modification to the firmware's file system or web UI (webif)įlash modified firmware onto device and brick it (ha) Extract a firmware image into its component parts
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