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Linux Kernel Programming

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

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Product type Paperback
Published in Mar 2021
Publisher Packt
ISBN-13 9781789953435
Length 754 pages
Edition 1st 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 (19) Chapters Close

Preface 1. Section 1: The Basics
2. Kernel Workspace Setup FREE CHAPTER 3. Building the 5.x Linux Kernel from Source - Part 1 4. Building the 5.x Linux Kernel from Source - Part 2 5. Writing Your First Kernel Module - LKMs Part 1 6. Writing Your First Kernel Module - LKMs Part 2 7. Section 2: Understanding and Working with the Kernel
8. Kernel Internals Essentials - Processes and Threads 9. Memory Management Internals - Essentials 10. Kernel Memory Allocation for Module Authors - Part 1 11. Kernel Memory Allocation for Module Authors - Part 2 12. The CPU Scheduler - Part 1 13. The CPU Scheduler - Part 2 14. Section 3: Delving Deeper
15. Kernel Synchronization - Part 1 16. Kernel Synchronization - Part 2 17. About Packt 18. Other Books You May Enjoy

The procmap process VAS visualization utility

As a small learning and teaching (and helpful during debug!) project, I have authored and hosted a small project on GitHub going by the name of procmap, available here: https://github.com/kaiwan/procmap (do git clone it). A snippet from its README.md file helps explain its purpose:

procmap is designed to be a console/CLI utility to visualize the complete memory map of a Linux process, in effect, to visualize the memory mappings of both the kernel and user mode Virtual Address Space (VAS). 

It outputs a simple visualization, in a vertically-tiled format ordered by descending virtual address, of the complete memory map of a given process (see screenshots below). The script has the intelligence to show kernel and user space mappings as well as calculate and show the sparse memory regions that will be present. Also, each segment or mapping is scaled by relative size (and color-coded for readability). On 64-bit systems, it also...
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