Linux Kernel Programming: Driver Modification Tutorial
In this video, we dive into modifying and compiling a Linux kernel driver, focusing on the pcnet32 driver. The tutorial covers key aspects such as ABI compatibility and module loading. This video is the first of many aimed at advancing practical knowledge in kernel development.
Commands:
# Step 1: Install Necessary Tools
sudo apt update
sudo apt install build-essential libncurses-dev bison flex libssl-dev libelf-dev
# Step 2: Install the Kernel Source Package
cd /usr/src/
sudo apt install linux-source-{version} # replace version
sudo tar -xjf linux-source-{version}.tar.bz2 # replace version
cd linux-source-{version} # replace version
sudo chown -R {user}:{user} /usr/src/linux-source-{version} # replace version
# Step 3: Modify the pcnet driver
nvim drivers/net/ethernet/amd/pcnet32.c
# Step 4: Configure the Kernel
cp /boot/config-$(uname -r) .config
make oldconfig
# Step 5: Compile
make modules_prepare
cd drivers/net/ethernet/amd
make -C /lib/modules/$(uname -r)/build M=$(pwd) modules
# Step 6: Unload and Reload new module
lsmod | grep pcnet32
sudo rmmod pcnet32
lsmod | grep pcnet32
sudo insmod ./pcnet32.ko
lsmod | grep pcnet32
sudo dmesg | less
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