x86-64 os made in crystal

lilith

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

Building

lilith needs to be compiled with a patched crystal compiler, to build it, run the command:

make toolchain/crystal/.build/crystal

You will also need an appropriate x86_64-elf binutils toolchain in order to link and assemble the kernel, as well as i686-elf binutils to build the bootstrap code.

make build/kernel

Building the userspace

A Makefile is provided for building the userspace toolchain, to build it, go to the userspace/toolchain directory and use make .

Once built, a patched version of GCC/Binutils will be installed in userspace/toolchain/tools/bin , simply set your PATH variable to that location and you can use the toolchain (with the i386-elf-lilith prefix)

To compile C programs for the system, you'll also need to build the libc. In the userspace/toolchain directory, do:

make build_libc

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.

make run_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.

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