Rust OSDev Operating System Development in Rust

This Month in Rust OSDev: July 2023

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.

Infrastructure and Tooling

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

rust-osdev Projects

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


Maintained by @phip1611

The multiboot2 was bumped from 0.16.0 to 0.17.0. The new release includes the builder pattern for the MBI builder and the ability to use custom memory types in the memory map in addition to pre-defined ones. For more info, look here.


Maintained by @GabrielMajeri, @nicholasbishop, and @phip1611

The uefi-rs crate provides safe and performant wrappers for UEFI, the successor to the BIOS. We merged the following PRs this month:

Thanks to @devsnek for their contribution!


Maintained by @toku-sa-n

The xhci crate provides types of xHCI structures, such as Registers and TRBs. We merged the following PRs this month:

Thanks to @lemolatoon for their contribution!


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 PR this month:

Thanks to @SamZhang3 for their contribution!


Maintained by @phil-opp

The bootloader crate implements a custom Rust-based bootloader for easy loading of 64-bit ELF executables. This month, we released a new patch version to fix the build on the latest nightlies:


Maintained by @phil-opp

The ovmf-prebuilt project provides pre-built edk2 releases to make it easier to set up OVMF. We merged the following improvement this month:

Thanks to @nicholasbishop for their contribution!

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.


(Section written by @SFBdragon)

Talc is a recently published, fast, and flexible no-std memory allocator.

  • It's the fastest allocator I've tested as of yet (galloc falls short, buddy_alloc is close but lacks heap efficiency).
  • It features a OOM-handling component with dynamic arena resizing.

By the time you're seeing this, hopefully v2 should be out or coming soon:

  • The OOM handler system has been made more powerful.
  • lock_api is used to allow for custom allocator synchronization.
  • The internals and API has been improved to pass miri's stacked borrows validation.
  • You can now move the allocator struct around freely.
  • And more :3

I hope you find it useful!


(Section written by @vinc)

MOROS is a text-based hobby operating system targeting computers with a x86-64 architecture and a BIOS.

Since last month's release, I focused on adding new syscalls to interact with network sockets from userspace. The DNS and HTTP clients are now using the new UDP and TCP sockets.

I also added another syscall to poll multiple handles at the same time, to read from the console and a socket, improving the main network tool that can now be used as a simple chat program.

The VGA driver, the filesystem, and the editor got a few significant improvements as well, to support downloading and reading larger files.


(Section written by @phil-opp)

There is a new project featured in our Showcase series:

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 gitter channel.