k0 — A Simple x86 Kernel

This project is a minimal kernel written in C and Assembly, booted using limine and tested in QEMU. It's designed for learning the low-level fundamentals of operating systems.

---

Requirements

Make sure the following packages are installed:

Fedora:

sudo dnf install gcc binutils make grub2-tools-extra xorriso qemu-system-i386 wget curl

Ubuntu/Debian

sudo apt install gcc binutils make grub-pc-bin xorriso qemu-system-i386 wget curl

Step 1: Build the cross compiler

chmod u+x build-cross.sh
bash build-cross.sh

This will:

• Download and build binutils and gcc targeting i686-elf
• Install them into ./cross
• Leave your system GCC untouched

Step 2: Build and run the kernel

make         # Builds everything and produces k0.iso
make run     # Boots it in QEMU
make clean   # Removes build artifacts (but keeps the toolchain)
make clean-cross   # Removes everything including the cross-compiler