Rv6

A riscv operating system written in rust.

Requirements

• rust
• qemu, especially qemu-system-riscv64.
• riscv-gnu-toolchain (optional but recommended).

After installing rust, you need to switch to nightly and install the riscv64gc-unknown-none-elf target:

rustup override set nightly # switch to nightly in this directory
rustup target add riscv64gc-unknown-none-elf
cargo install cargo-binutils

For MacOS users, you can install qemu and riscv-gnu-toolchain with homebrew.

brew install qemu   
brew tap riscv/riscv
brew install riscv-gnu-toolchain

Run

make fs # build the filesystem image, only need to run once
make run

Debugging with gdb:

make debug
riscv64-unknown-elf-gdb # in another terminal

Features(Goal)

• process manage and context switch
• system call like xv6's
• simple crash-free filesystem like xv6's
• simple bootstrap compiler running inside the os(so we have everything in principle)
• simple GUI

References

• xv6 An awesome teaching os written in C.
• Writing an OS in Rust A great blog about writing os in rust.
• rCore A rust os project with Chinese documents.