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Mastering Embedded Linux Development

Mastering Embedded Linux Development

By : Frank Vasquez, Mr. Chris Simmonds
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Mastering Embedded Linux Development

Mastering Embedded Linux Development

By: Frank Vasquez, Mr. Chris Simmonds

Overview of this book

Mastering Embedded Linux Development' is designed to be both a learning resource and a reference for your embedded Linux projects. The book starts by breaking down the fundamental elements that underpin all embedded Linux projects: the toolchain, the bootloader, the kernel, and the root filesystem. First, you will download and install a pre-built toolchain. After that, you will cross-compile each of the remaining three elements from scratch and learn to automate the process using Buildroot and the Yocto Project. The book progresses with coverage of over-the-air software updates and rapid prototyping with add-on boards. Two new chapters tackle modern development practices including Python packaging and deploying containerized applications. These are followed by a chapter on writing multithreaded code and another on techniques to manage memory in an efficient way. The final chapters demonstrate how to debug your code, whether it resides in user space or in the Linux kernel itself. In addition to GDB, the book also covers the different tracers and profilers that are available for Linux so that you can quickly pinpoint any performance bottlenecks in your system. By the end of this book, you will be able to create efficient and secure embedded devices with Linux that will delight your users.
Table of Contents (28 chapters)
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1
Part 1: Elements of Embedded Linux
7
Part 2: Building Embedded Linux Images
11
Part 3: System Architecture and Design Decisions
18
Part 4: Developing Applications
23
Part 5: Debugging and Optimizing Performance

Configuring the kernel

Having decided which kernel to base your image on, the next step is configuring the kernel.

Getting the source

All three of the targets used in this book (Raspberry Pi 4, BeaglePlay, and QEMU) are well supported by the mainline kernel. Therefore, it makes sense to use the latest long-term kernel available from https://www.kernel.org/, which, at the time of writing, was 6.6.46. When you come to do this for yourself, you should check to see if there is a later version of the 6.6 kernel and use that instead since it will have fixes for bugs found after 6.6.46 was released.

IMPORTANT NOTE

If there is a later long-term release, you may want to consider using that one. However, be aware that there may have been changes that mean that the following sequence of commands does not work exactly as given.

To fetch and extract a release tarball of the 6.6.46 Linux kernel, use the following:

$ cd ~
$ wget https://cdn.kernel.org/pub/linux...

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