CrabOS 🦀

Setup

You need a few things to build this:

• Rust nightly
• cargo-xbuild
• nasm
• A cross binutils targeting x86_64-elf

MacOS

1. Install Rust with rustup. Make sure install nightly and select it as your default compiler.

2. Install nasm from Homebrew:

   brew install nasm
   

3. Install cargo-xbuild from cargo:

   cargo install cargo-xbuild
   

4. Install binutils from source. I build my cross compilers into ~/cross, but anywhere works.

   curl -O https://ftp.gnu.org/gnu/binutils/binutils-2.32.tar.gz
   tar xf binutils-2.32
   cd binutils-2.32
   ./configure --target=x86_64-elf --disable-werror --prefix=$HOME/cross
   make && make install
   

Building

make

Known Bugs

• QEMU's TCG accelerator (the default) has a buggy implementation of the FS.base and GS.base MSRs. Use the KVM or HVF accelerators instead.