doom / foros

Tiny kernel (educational project)

foros

Tiny kernel (educational project)

Build instructions

Prerequisites

• make
• gcc or clang
• nasm
• ld
• grub-mkrescue / xorriso
• qemu

Building

Build:

> make

Run:

> make run

Debug:

> make P=debug run

Features

• Boot
• Stack setup
• CPU capabilities checks
• Page table setup (using recursive mapping)
• GDT setup
• Switch to long mode
• VGA text buffer abstraction
• IDT setup and interrupts handling
• Remapping of the 8259 PIC and activation of maskable interrupts
• Physical memory allocation
• Virtual-to-physical memory mapping
• Kernel heap
• Basic keyboard abstraction (scan codes to key events to characters)