This Month in Rust OSDev: August 2025

Welcome to a new issue of "This Month in Rust OSDev". In these posts, we give a regular overview of notable changes in the Rust operating system development ecosystem.

This series is openly developed on GitHub. Feel free to open pull requests there with content you would like to see in the next issue. If you find some issues on this page, please report them by creating an issue or using our comment form at the bottom of this page.

Announcements, News, and Blog Posts

Here we collect news, blog posts, etc. related to OS development in Rust.

• This Month in Redox - August 2025
• Announcing Asterinas 0.16.0
• minimal FAT32 file system driver written in #[no_std] rust
• Writing a Hypervisor in 1,000 Lines
• Proka Kernel - A kernel for ProkaOS
• Introducing Rusted Firmware-A (RF-A) - A Rust-Based reimagination of Trusted Firmware-A
• nanomp3: A pure Rust no_std MP3 decoding library
• Video: Intrusive Linked Lists for Fun and Profit (on embedded)

Infrastructure and Tooling

In this section, we collect recent updates to rustc, cargo, and other tooling that are relevant to Rust OS development.

• Make target pointer width in target json an integer
• Implement support for become and explicit tail call codegen for the LLVM backend

rust-osdev Projects

In this section, we give an overview of notable changes to the projects hosted under the rust-osdev organization.

acpi

Maintained by @IsaacWoods

The acpi repository contains crates for parsing the ACPI tables – data structures that the firmware of modern computers use to relay information about the hardware to the OS. We merged the following changes this month:

• Rewrite acpi crate and entire AML interpreter

bootloader

Maintained by @phil-opp and @Freax13

The bootloader crate implements a custom Rust-based bootloader for easy loading of 64-bit ELF executables. This month, we merged the following fix:

• fix target-c-int-width for 0.9.x
• release v0.11.11

uefi-rs

Maintained by @GabrielMajeri, @nicholasbishop, and @phip1611

uefi makes it easy to develop Rust software that leverages safe, convenient, and performant abstractions for UEFI functionality.

We merged the following PRs this month:

• Use size_of/align_of from prelude
• Add (partial) safe protocol implementation for EFI_HII_DATABASE_PROTOCOL
• xtask: improved error output for "wrong" repr
• EFI Shell Interface: CurDir Functions
• uefi-raw: move types to net module
• uefi-raw: various small net improvements
• uefi-raw: changelog update

Thanks to @seijikun and @RenTrieu for their contributions!

virtio-spec-rs

Maintained by @mkroening

The virtio-spec crate provides definitions from the Virtual I/O Device (VIRTIO) specification. This project aims to be unopinionated regarding actual VIRTIO drivers that are implemented on top of this crate.

We merged the following PRs this month:

• fix(pci): capabilities are always little-endian
• fix(pci): actually convert MMIO access to little endian
• chore: release version 0.3.1

Thanks to @Gelbpunkt for their contributions!

x86_64

Maintained by @phil-opp, @josephlr, and @Freax13

The x86_64 crate provides various abstractions for x86_64 systems, including wrappers for CPU instructions, access to processor-specific registers, and abstraction types for architecture-specific structures such as page tables and descriptor tables.

We merged the following PRs this month:

• Bump actions/checkout from 4 to 5
• add PageFaultErrorCode::HLAT

Other Projects

In this section, we describe updates to Rust OS projects that are not directly related to the rust-osdev organization. Feel free to create a pull request with the updates of your OS project for the next post.

phil-opp/blog_os

(Section written by @phil-opp)

We merged the following changes to the Writing an OS in Rust blog this month:

• Update post texts to Rust 2024 (thanks to thaliaarchi)
• fix edition2@post-11 Chinese translation error (thanks to ttttyy)
• Add post-12 simplified Chinese translation (thanks to ic3-w1ne)
• fix(post-01): typo (thanks to L3Sota)
• Set test=true to enable main.rs testing again
• Update testing post to set test = true in Cargo.to
• Fix: target-pointer-width field now expects an integer
• Update blog for target-pointer-width change

Join Us?

Are you interested in Rust-based operating system development? Our rust-osdev organization is always open to new members and new projects. Just let us know if you want to join! A good way for getting in touch is our Zulip chat.

Comments