Jan 30, 2019 · Kernel modules are pieces of code that can be loaded and unloaded into the kernel upon demand. They extend the functionality of the kernel without the need to reboot the system. Custom codes can be added to Linux kernels via two methods.

Jan 29, 2021 · The Linux Kernel is perhaps the most ubiquitous (and arguably still underappreciated) piece of software around today. It forms the basis of all Linux distributions (obviously), but that’s not...

Apr 26, 2025 · Creating a simple kernel module for Linux is a great way to get started with Linux kernel development. By following this guide, you have learned how to write a basic “Hello World” module, compile it, load it into the kernel, and then remove it safely.

The Linux Kernel Module Programming Guide is a free book; you may reproduce and/or modify it under the terms of the Open Software License, version 1.1. You can obtain a copy of this license at http://opensource.org/licenses/osl.php.

Jul 17, 2013 · On a normal linux system, the kernel modules will reside inside /lib/modules/<kernel_version>/kernel/ directory. Earlier we discussed how to compile a kernel from the source . This tutorial explains how to write a Kernel module using a …

Sep 30, 2020 · Let's write a simple Linux kernel hello world module, and try to understand all the basic things defined in that program.

Nov 30, 2017 · A Linux kernel module is a piece of compiled binary code that is inserted directly into the Linux kernel, running at ring 0, the lowest and least protected ring of execution in the x86–64 processor.

This project keeps the Linux Kernel Module Programming Guide up to date, with working examples for recent 5.x and 6.x kernel versions. The guide has been around since 2001 and most copies of it on the web only describe old 2.6.x kernels.

May 29, 2023 · In this article, we have covered the essential steps required to create a simple "Hello, World!" kernel module. We use Linux Ubuntu 20.04 and started by setting up the development environment by installing the necessary packages. Then, we explored the simple structure of a Linux kernel module.

Building External Modules¶ This document describes how to build an out-of-tree kernel module. Introduction¶ “kbuild” is the build system used by the Linux kernel. Modules must use kbuild to stay compatible with changes in the build infrastructure and to …