Shitty OS (Learning Kernel)

Small educational x86 kernel with a minimal syscall layer, basic ELF loading, a RAM-backed filesystem, and a simple TTY.

Highlights

• 32-bit freestanding kernel
• GDT/IDT setup with timer and keyboard IRQs
• Syscalls: write/read/getchar/malloc/exec/exit
• ELF loader for basic binaries
• RAM filesystem for embedded files
• Simple interactive TTY

Build and Run

make
make run

Project Layout

• bootloader/ - Boot code and multiboot setup
• kernel/ - Core kernel code, drivers, syscalls, and TTY
• config/ - Linker script and GRUB config
• build/ - Build outputs
• iso/ - Bootable ISO staging
• assets/ - Screenshots for README

Notes

• This is a learning project. Expect rough edges and missing safety features.
• ELF programs run in kernel mode; no user mode or paging yet.

Next Ideas

• Process model and basic scheduler
• Page tables and memory isolation
• Real disk driver (ATA) with a simple on-disk FS