Notes On "Linux Kernel Development"

This is the third installment in a series of posts where I share notes taken while reading an interesting book or article. This post includes the notes made while reading the book titled “Linux Kernel Development” by Robert Love. Getting Started The following are key differences between userspace application development and Linux kernel development: No access to the C library or C headers. There are versions of certain libc functions included in the kernel under lib/....

April 4, 2024 · 31 min · Ivan Eduardo Guerra

Linux Kernel Development Using QEMU

This article gives an overview of how to setup a Linux kernel development environment that leverages QEMU. Why should you bother with this setup? Here are the highlights: Make changes to core kernel code or modules without the risk of loading buggy kernel code onto real hardware. Up the speed of the edit, build, run cycle while developing kernel code. The ability to test code across different architectures (for example, aarch64, x86_64, etc....

February 20, 2024 · 8 min · Ivan Eduardo Guerra

Notes On "Linux Driver Development for Embedded Processors"

This is the second installment in a series of posts where I share notes taken while reading an interesting book or article. This post includes the notes made while reading “Linux Driver Development for Embedded Processors” by Alberto Liberal de los Rios. Notes weren’t taken for every chapter so keep in mind that the book actually covers more topics than what’s shown here. If you are considering buying the book, you might want to checkout this review1 before buying....

February 15, 2024 · 8 min · Ivan Eduardo Guerra

Notes On "What Every Programmer Should Know About Memory"

This is the first installment in a series of posts where I share notes taken while reading an interesting book or article. This post includes the notes made while reading a series of articles by Ulrich Drepper titled “What Every Programmer Should Know About Memory”. Part 1: Introduction There are a number of different computer architectures each with their own tradeoffs. The commodity HW setup has the CPUs attached via a Frontside Bus (FSB) to a Northbridge and indirectly via the Northbridge to a Southbridge....

February 14, 2024 · 9 min · Ivan Eduardo Guerra

Signing Git Commits With GPG

If you’ve been around the open source community long enough, you’ve probably heard of people signing their VCS commits/tags. This post covers the why and how of signing your Git commits. The focus will be on commits but keep in mind that these tips equally apply to tags. Why Sign Your Commits The short answer is, signing your commits makes it harder for an attacker to impersonate you. Sure, if you work solo on rinky-dink toy projects, having your commits signed isn’t a big deal....

January 21, 2024 · 6 min · Ivan Eduardo Guerra