Posts

Where does a newbie start their journey into the Linux kernel? Device drivers is the most common answer. Despite its age, Linux Device Drivers 3rd Edition (LDD3) remains one of the best options for learning about device drivers. There are challenges in using such an old text. LDD3’s code examples target the 2.6.10 kernel. At the time of this writing, the kernel is at version 5.19! That said, fixing API deltas just adds to the fun. This article talks about setting up an environment for LDD3 experimentation and the LDD3 experience itself. ...

At the beginning of 2022, I set a personal goal to implement a bare bones OS. The first step was to define what success would look like for the project. The goal is to create an OS that could allocate a single process that adds two numbers and prints the result to the screen. It took a month long journey into the world of x86 emulators, NASM assembly, and architecture reference manuals to get remotely close. ...