Kernel From Scratch

This project aims to build a minimalistic operating system kernel from scratch. This is just an introduction to barebone programming in rust, so our kernel doesn't do much for now.

Features

• Boots with GRUB.
• Prints to the screen using VGA buffer.
• Sets up a Global Descriptor Table.
• Provides a simple terminal interface with a few commands listed below.
• Written in assembly language and Rust.
• Provides a foundation for learning about operating system internals and kernel development.
• Still very early stage kernel, no interrupts, no paging, at least for now...
• TETRIS !

Getting Started

1. Clone the repository: git clone https://github.com/tgrasset/kfs.git
2. Navigate to the project directory: cd kfs
3. Compile and link binary, build the bootable iso file (all done in a docker) and then run the kernel with qemu: make run

Usage

Available commands :

• help : Prints a list of available commands and what they do
• color : Changes writing color
• echo : Prints on the screen
• stack : Prints the content of the stack (must be given a size)
• 42 : Prints '42', that was the first thing our kernel did so we kept it !
• reboot : Reboots the machine
• halt : Halts the CPU (since our kernel doesn't handle interrupts yet, this basically freezes everything 🙃)
• clear : Clears the terminal screen
• gdt : Prints the content of the Global Descriptor Table at address 0x800
• s : Switch tab
• 1, 2, 3: Goes directly to tab 1, 2 or 3.
• tetris : 🎮

Scroll up and down with up and down arrows, move cursor with left and right arrows.

Acknowledgements

This project was made with my teammate tgrasset at 42school.