What is a microkernel in Rust?

A minimal kernel core handling basics (IPC, scheduling), pushing everything else to user space—for better isolation, using Rust's safety nets.

How do you build a microkernel from scratch?

Start with bare-metal boot (Rust no_std), add IPC messaging, interrupts for preemption, page tables for VM. Emulate first—QEMU ARM. Follow Bahree's 5 parts.

Does this Rust microkernel run real apps?

Not yet—toy stage, boots and multitasks simply. But fork it; drivers next.

📦 Open Source Projects

Rust Microkernel: From Boot to Virtual Memory, Scratch-Built

One dev's gap between jobs sparked a Rust microkernel odyssey: boot to virtual memory in five gritty parts. It's a reminder that OS abstractions hide smart engineering, not sorcery.

theAIcatchup Apr 10, 2026 3 min read

Rust microkernel booting on emulated ARM with debug output

⚡ Key Takeaways

Building a Rust microkernel demystifies OS 'magic' as layered tradeoffs. 𝕏
Rust's safety shines in kernel land—no nulls, no segfaults. 𝕏
Microkernels prioritize isolation; future OSes might follow suit. 𝕏

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theAIcatchup

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#ARM kernel #OS development #arm-architecture #bare metal Rust #kernel development #kernel from scratch #operating-systems #rust-microkernel #rust-osdev #systems programming

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Originally reported by Reddit r/programming

⚡ Key Takeaways

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