SEALS or Simple Embedded ARM Linux System is a very simple "skeleton" Linux base system running on an emulated ARM machine. It provides a primary Bash script that asks the end user what functionality they want via a menu, then accordingly proceeds to cross-compile a Linux kernel for ARM, then creates and initializes a simple root filesystem. It can then call upon QEMU ( qemu-system-arm) to emulate and run an ARM platform (the Versatile Express CA-9 is the default board emulated). The useful thing is, the script builds the target kernel, the root filesystem, and the root filesystem image file, and sets things up for boot. It even has a simple GUI (or console) frontend, to make usage a bit simpler for the end user. The project's GitHub page is here: https://github.com/kaiwan/seals/. Clone it and give it a try... we definitely recommend you have a look at its wiki section pages at https://github.com/kaiwan/seals/wiki for help.
Linux Kernel Programming
By :
Linux Kernel Programming
By:
Overview of this book
Linux Kernel Programming is a comprehensive introduction for those new to Linux kernel and module development. This easy-to-follow guide will have you up and running with writing kernel code in next-to-no time. This book uses the latest 5.4 Long-Term Support (LTS) Linux kernel, which will be maintained from November 2019 through to December 2025. By working with the 5.4 LTS kernel throughout the book, you can be confident that your knowledge will continue to be valid for years to come.
You’ll start the journey by learning how to build the kernel from the source. Next, you’ll write your first kernel module using the powerful Loadable Kernel Module (LKM) framework. The following chapters will cover key kernel internals topics including Linux kernel architecture, memory management, and CPU scheduling.
During the course of this book, you’ll delve into the fairly complex topic of concurrency within the kernel, understand the issues it can cause, and learn how they can be addressed with various locking technologies (mutexes, spinlocks, atomic, and refcount operators). You’ll also benefit from more advanced material on cache effects, a primer on lock-free techniques within the kernel, deadlock avoidance (with lockdep), and kernel lock debugging techniques.
By the end of this kernel book, you’ll have a detailed understanding of the fundamentals of writing Linux kernel module code for real-world projects and products.
Table of Contents (19 chapters)
Preface
Section 1: The Basics
Free Chapter
Kernel Workspace Setup
Building the 5.x Linux Kernel from Source - Part 1
Building the 5.x Linux Kernel from Source - Part 2
Writing Your First Kernel Module - LKMs Part 1
Writing Your First Kernel Module - LKMs Part 2
Section 2: Understanding and Working with the Kernel
Kernel Internals Essentials - Processes and Threads
Memory Management Internals - Essentials
Kernel Memory Allocation for Module Authors - Part 1
Kernel Memory Allocation for Module Authors - Part 2
The CPU Scheduler - Part 1
The CPU Scheduler - Part 2
Section 3: Delving Deeper
Kernel Synchronization - Part 1
Kernel Synchronization - Part 2
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