Philipp Oppermann

Writing an OS in Rust: Introduction to Paging

This post introduces paging, a very common memory management scheme that we will also use for our operating system. It explains why memory isolation i…

Writing an OS in Rust: Async/Await

In this post, we explore cooperative multitasking and the async/await feature of Rust. We take a detailed look at how async/await works in Rust, inclu…

Writing an OS in Rust: Hardware Interrupts

In this post, we set up the programmable interrupt controller to correctly forward hardware interrupts to the CPU. To handle these interrupts, we add …

Writing an OS in Rust: Advanced Paging

This post explains techniques to make the physical page table frames accessible to our kernel. It then uses such a technique to implement a function t…

Writing an OS in Rust: Better Exception Messages

Writing an OS in Rust: Handling Exceptions

Writing an OS in Rust: Remap the Kernel

Writing an OS in Rust: Returning from Exceptions

Writing an OS in Rust: Testing

This post explores unit and integration testing in no_std executables. We will use Rust’s support for custom test frameworks to execute test functions…

Writing an OS in Rust: Catching CPU Exceptions

Writing an OS in Rust: Kernel Heap

Allocator Designs

This post explains how to implement heap allocators from scratch. It presents and discusses different allocator designs, including bump allocation, li…

Writing an OS in Rust: Allocating Frames