lilith

A POSIX-like x86-64 kernel and userspace written in Crystal.

Screenshot

Building

See BUILDING.md.

Running

A CPU with x64 support is required to run the OS. The Makefile provides a script which will run QEMU on the kernel:

make run

To run with storage, an MBR-formatted hard drive image with a FAT16 partition must be provided in the running directory with the name drive.img. The kernel will automatically boot the main.bin executable on the hard drive, or panic if it can't be loaded.

Issue this command to run with gdb attached:

make rungdb_img

Features

• Basic x86-64 support
• Hybrid conservative-precise incremental garbage collector
• IDE/ATA support (well, it can only load from primary master)
• FAT16 support
• Unix syscalls (open, read, write, spawn,...)
• Preemptive multitasking!
• Userspace C library written in Crystal (mostly)
• A window manager and some graphical programs (terminal emulator, file manager)
• And much more as I go...

License

Lilith is licensed under MIT. See LICENSE for more details.