mos — A RISC-V / x86_64 OS Kernel written in Rust

A from-scratch operating system kernel written in Rust (no_std, no_main), targeting x86_64 with UEFI boot.

Features

• UEFI boot via bootloader-api (QEMU + OVMF support)
• Physical frame management & kernel heap allocation
• Interrupt handling (APIC, legacy fallback)
• PCI bus probing + virtio drivers
• Framebuffer console & window rendering (RGBA pixel buffer)
• VFS / devfs / fifo & basic syscall layer
• Task scheduling & ECS-based subsystems

Requirements

rustup toolchain install nightly
rustup component add llvm-tools-preview
rustup target add x86_64-unknown-none

• qemu-system-x86_64 emulator
• clang (for C sources via cc build script)

Build & Run

cargo build
# run in QEMU with UEFI firmware (OVMF)

This repository is part of a larger workspace; see mos-projects for the full workspace layout (fs, allocators, runtime crates, etc.).

License

MIT