mini-os

minimal x86_64 kernel in rust. memory, interrupts, heap, shell.

architecture

bootloader → gdt → idt → pics → paging → heap → shell

module	what it does
gdt	segment descriptors, tss, user-mode segments
interrupts	idt — exception handlers, irqs, timer, keyboard
memory	page tables, frame allocator, page-flag ops
allocator	heap with 3 strategies: bump, linked list, fixed-size block
vga_buffer	80×25 text mode, colored
serial	uart 16550, test logging
shell	repl with 10 commands, keyboard input, history
task	cooperative async executor, task spawning, wakers
ramdisk	in-memory block device, read/write/hex decode

building

needs rust nightly (rust-toolchain.toml) and qemu.

cargo install bootimage
cargo bootimage

running

qemu-system-x86_64 -drive format=raw,file=target/x86_64-mini-os/debug/bootimage-mini-os.bin

testing

custom test framework, runs inside qemu, reports over serial.

cargo test

license

mit — LICENSE-MIT.