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Linux Kernel Programming - Second Edition

You're reading from  Linux Kernel Programming - Second Edition

Product type Book
Published in Feb 2024
Publisher Packt
ISBN-13 9781803232225
Pages 826 pages
Edition 2nd Edition
Languages
Author (1):
Kaiwan N. Billimoria Kaiwan N. Billimoria
Profile icon Kaiwan N. Billimoria

Table of Contents (16) Chapters

Preface 1. Linux Kernel Programming – A Quick Introduction 2. Building the 6.x Linux Kernel from Source – Part 1 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

Emulating “library-like” features for kernel modules

One of the major differences between user-mode and kernel-mode programming is the complete absence of the familiar “library” concept in the latter. Libraries are essentially a collection or archive of APIs, conveniently allowing developers to meet these important goals: do not reinvent the wheel, software reuse, modularity, portability and the like. But within the Linux kernel, libraries – in the traditional sense of the word – just do not exist. Having said that, the lib/ folder within the kernel source tree contains library-like routines, several of which get built into the kernel image and are thus available to kernel/module developers at runtime.

The good news is that, broadly speaking, there are two techniques by which you can achieve “library-like” functionality in kernel space for your kernel modules:

  • The first technique is by explicitly “linking...
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