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Linux Kernel Programming

You're reading from   Linux Kernel Programming A comprehensive and practical guide to kernel internals, writing modules, and kernel synchronization

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Product type Paperback
Published in Feb 2024
Publisher Packt
ISBN-13 9781803232225
Length 826 pages
Edition 2nd Edition
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Author (1):
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Kaiwan N. Billimoria Kaiwan N. Billimoria
Author Profile Icon Kaiwan N. Billimoria
Kaiwan N. Billimoria
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Table of Contents (16) Chapters Close

Preface 1. Linux Kernel Programming – A Quick Introduction 2. Building the 6.x Linux Kernel from Source – Part 1 FREE CHAPTER 3. Building the 6.x Linux Kernel from Source – Part 2 4. Writing Your First Kernel Module – Part 1 5. Writing Your First Kernel Module – Part 2 6. Kernel Internals Essentials – Processes and Threads 7. Memory Management Internals – Essentials 8. Kernel Memory Allocation for Module Authors – Part 1 9. Kernel Memory Allocation for Module Authors – Part 2 10. The CPU Scheduler – Part 1 11. The CPU Scheduler – Part 2 12. Kernel Synchronization – Part 1 13. Kernel Synchronization – Part 2 14. Other Books You May Enjoy
15. Index

Understanding the basics of a kernel module Makefile

You may have noticed by now that we tend to follow a one-kernel-module-per-directory rule of sorts. Yes, that definitely helps keep things organized. So, let’s take our second kernel module, the ch4/printk_loglvl one. To build it, we just cd to its folder, type make, and (fingers crossed!) voilà, it’s done. We have the printk_loglevel.ko kernel module object freshly generated (which we can then apply insmod/rmmod to). But how exactly did it get built when we typed make? Explaining this is the purpose of this section.

First off, we do expect you to understand the basics regarding make and the Makefile. If not, don’t fret, we’ve provided links to check this out, within the Further reading section (in the paragraph labeled Makefiles: introductory stuff) of this chapter. . Check it out! (Link: https://github.com/PacktPublishing/Linux-Kernel-Programming_2E/blob/main/Further_Reading.md#chapter...

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