ShawnOS is an Operating System/Kernel meant to help learn the fundamentals of Operating System development, primarily on Intel x86-based architectures.
The project is very much a work-in-progress at this point and many design decisions regarding the OS are yet to be made. Eventually, the project aims to reach a basic level of usability, with a functional console environment and C compiler.
All code is licensed under the GNU GPL v3 unless explicitly stated elsewhere.
In order to build and run ShawnOS, a gcc cross-compiling toolchain must be present for the desired target (currently i686-elf is only supported).
The OSDev Wiki has a tutorial on how to create the required toolchain for Linux, OS X, and Windows here.
In addition to the tools mentioned in the OSDev wiki, you will also need a few more packages.
- nasm
- xorriso
- mtools
- grub-pc (Debian/Ubuntu only)
These are available in most Linux distributions' package managers.
# Debian/Ubuntu
$ sudo apt-get install nasm xorriso mtools grub-pc-bin
# Fedora
$ sudo dnf install nasm xorriso mtools
# Arch Linux
$ sudo pacman -S nasm xorriso mtools
Once you have set up the necessary toolchain, you must update the PREFIX and PATH variables in env.sh to reflect its location.
Example:
export PREFIX='$HOME/opt/cross'
export TARGET=i686-elf
export PATH='$PREFIX/bin:$PATH'
Once you have completed this, simply run the following to load the variables:
$ source env.sh
Now you may build an ISO image of the OS:
$ make iso
If you have qemu installed for the proper architecture, you can also run ShawnOS in a virtual machine:
$ make qemu
The project eventually aims to provide a basic usable user space with console utilities and a C compiler.
Much of the code from ShawnOS is adapted from or inspired by the following resources: