XunilOS

XunilOS is an OS made from scratch in Rust. The repo is based on the limine-rust-template.

It supports aarch64 inside QEMU, and x86_64 even on bare machines!

IMPORTANT

For some reason, it doesn't work with default QEMU or VirtualBox settings. So, you have to:

qemu-system-x86_64 -M q35 -serial stdio -cdrom XunilOS-x86_64.iso -m 4G

Or:

qemu-system-aarch64 -M virt,gic-version=2,secure=off -cpu cortex-a72 -device ramfb -device qemu-xhci -device usb-kbd -device usb-mouse -device virtio-keyboard-device -device virtio-mouse-device -serial stdio -cdrom XunilOS-aarch64.iso -semihosting-config enable=on,target=native -m 4G -global virtio-mmio.force-legacy=false

Features

Kernel

• x86_64 IDT, GDT, interrupts, kernel heap, PS2 mouse/keyboard, paging, syscalls and usermode.
• aarch64 kernel heap, paging, interrupts, Virtio mouse/keyboard, syscalls, usermode
• Scheduler which does round-robin switching as well as sleeping and waking processes
• ELF64 ET_EXEC and ET_DYN loading, verifying and running support
• A readonly VFS which currently includes the ELF files which can be ran
• IPC with granular permissions (read, write, manage)
• basic (and insecure) SHM support
• Limine bootloader
• Framebuffer and serial support
• Timing support based on IRQ
• Per-process address space, kernel & user stack
• Copy to and from userspace

Apps

• doomgeneric: Doom ported to XunilOS. Isn't as easy, as i am using Rust and had to write my own libc stub.
• badapple: Grayscale Bad Apple by using numbers to represent shades of gray. Pretty easy, but this is the only place where I also used Python.
• shell: simple shell with elf running, echo and file read commands.
• helloworld: just prints helloworld to serial

Init

• Desktop-like experience
• Window Management (close and minimize)
• Start menu to open applications
• BMP background
• Mouse support with a BMP image
• Dock where you can see currently open applications which can be minimized or unminimized

Libxunil (libc stub)

• Basic functions of C (printf, strlen, etc)
• File I\O, IPC, time
• Input reading from Window Management
• SHM
• User Heap
• Window management
• IPC support
• Syscalls to call back to the kernel
• Primitives, Framebuffer and font rendering