Tube Pi Kernel

A raspberry Pi (and other Linux) netfilter kernel module to deal with SPUD packets

Cross compiling on Linux (ubuntu)

Setting up the raspberry pi with the right kernel src and compiling a new kernel is painful. It is recommended to cross-compile a new kernel and the modules on another Linux box. (Or os-x (BSD) if you are feeling lucky)

Cross-compile kernel on Ubuntu

1. Install compiler and tools

apt-get install gcc-arm-linux-gnueabi make ncurses-dev

2. Create some handy directories

mkdir kernel
mkdir modules

3. Get kernel src (Make sure you have enough memory or swap space)

git clone https://github.com/raspberrypi/linux.git

4. Set env variables

export KERNEL_SRC=/home/palmarti/development/raspberry/linux/
export CCPREFIX=/usr/bin/arm-linux-gnueabi-
export MODULES_TEMP=/home/palmarti/development/raspberry/modules/

5. Prepare kernel compilation

cd linux make mrproper

6. Copy kernel config from this repo

cp ../pi-kernel-config .config

7. Compile kernel
   make ARCH=arm CROSS_COMPILE=${CCPREFIX} oldconfig
   make ARCH=arm CROSS_COMPILE=${CCPREFIX} -j4
   make ARCH=arm CROSS_COMPILE=${CCPREFIX} -j4 modules
   make ARCH=arm CROSS_COMPILE=${CCPREFIX} INSTALL_MOD_PATH=${MODULES_TEMP} modules_install

8. Make a nice package
   cd ..
   cd tools/mkimage
   ./imagetool-uncompressed.py ${KERNEL_SRC}/arch/arm/boot/zImage
   cd ../..
   cp tools/mkimage/kernel.img kernel/kernel_cross.img
   tar zczf kernel_pi.tar.gz modules/lib/ kernel/

9. Transfer the kernel_pi.tar.gz to the pi and ubdate /usr/lib and what kernel to boot

Cross compile module

1. Set env variables
   CCPREFIX=/usr/bin/arm-linux-gnueabi-

2. Call make
   ⋅make ARCH=arm CROSS_COMPILE=${CCPREFIX} KERNEL_HEADERS=/home/palmarti/development/raspberry/modules/lib/modules/3.18.9+/build