1
Ways of Implementing a System Call
Today, we’re going to look at the many ways of implementing user-to-kernel transitions on x86, i.e. system calls. Let’s first quickly review what system calls actually need to accomplish.
x86.lol
I’m blogging about low-level topics and my operating system projects on x86 and RISC-V.
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2
The Polyglot NixOS
Recently a colleague mentioned building NixOS images that run unchanged on multiple architectures. Given the past adventures on this blog with systemd-repart and cross-compiling NixOS, I decide to give this a go.
3
RISC-V Stumbling Blocks
Recently, I’ve started to explore RISC-V. I experienced the journey as pretty refreshing, particularly because I’ve been working on x86 low-level software almost exclusively for about 10 years.
4
Lanzaboote – NixOS Secure Boot
Secure Boot protects a system from an attacker that compromises the boot flow. For example, without Secure Boot it is easy to replace the code that reads your disk encryption password and store it somewhere where the attacker can pick it up later. So ideally you want Secure Boot to be enabled to limit the code that…