This project is a way for me to learn more about operating system development. Loosely guided by the OSDev wiki and Bran's Kernel Guide.
Written in C & ASM. Don't expect high quality or overly efficient code. This project is just for learning and experimenting. Maybe I'll have a "full" user mode OS in a few months.
No custom bootloaders here, using GRUB 2 (multiboot2). Writing a custom bootloader would be very educational but isn't worth the hassle for my first serious OS project.
- Kernel Boots
- GDT, IDT, ISRs
- Output to framebuffer
- Memory Management
Forever a work in progress, but at least functional for now - Font rendering
- IRQs
- Architecture setup
- PIT
- Keyboard
- Custom toolchain
- More correct/robust libc impl, syscalls (WIP)
- Kernel Modules (WIP)
- ELF loader
- Filesystem
- (S)ATA Driver
- IDE Driver
- FAT32 support (or ext4?)
- Paging
- Long mode (64-bit)
- SSEn for optimized memory operations
- User Mode!
This project can only be built on linux or WSL. You'll need cmake, autotools, qemu,
and the usual devtools (gcc, binutils) installed. To get started, run git submodule init and
git submodule update to download the gcc and binutils sources (this will take a while).
Next, cd into the toolchain directory and run ./build-toolchain.sh (this will also take a while).
To build the kernel, make a build directory and run cmake .. & make all from inside it.
To create the ISO image, run ./create_iso.sh inside the tools directory.
Use qemu-system-i386 -serial stdio --cdrom goose.iso to run the OS.
Any code not of my own design (mundane math functions) is credited to its "original" author via a comment.
The font is temporarily stored in the src/ folder until filesystem support is implemented.
The custom toolchain does not (and likely never will) support C++. Support is easy enough to add, but I do not plan on using it for this project. If you desperately want C++ support, open a PR with the appropriate modifications to the gcc config and libc crt* files.
Licensed under GPL-3.0