CrabOS

a monolithic kernel written in rust to x86 architecture, with a userland shell.

(\/) (°,,,,°) (\/)

Build & Run

1. install rust & qemu-system-x86_64

2. change you rustc channel to nightly

   rustup default nightly-x86_64-unknown-linux-gnu

   to check your rustc details run rustc --version --verbose

3. cargo install bootimage

   cargo install bootimage

4. add rustc component llvm-tools-preview and rust-src

   rustup component add rust-src --toolchain nightly-x86_64-unknown-linux-gnu
   rustup component add llvm-tools-preview

5. cargo run

Debug the kernel

1. add the -s -S options to the qemu command.
2. load the binary with gdb gdb /path/to/CrabOS
3. run in gdb target remote localhost:1234
4. start debugging :)

Feature

• UART for exceptions and unit testing
• VGA buffer
• interrupts & exceptions
• physical memory manager
• virtual memory manager
• kernel heap management
• processes
• syscall structure & userland
• file system
• shell and some commands
• maybe security stuff...

Research

• Memory Management
• Interrupts
• Miscellaneous
• Rust

Resources

osdev
intel's developer manual

Tutorials

• Writing an OS in rust
• digital whisper tutorial

Repositories

• byteOS
• MonkOS
• AlmeidaOS
• arbel-os