DarkForest Operating System

A work in progress x86 operating system

Screenshot:

Current features

• Preemptive Multiprocessing
• Basic round-robin scheduler
• Virtual Memory management
• Heap memory management
• Interrupts
• Keyboard driver
• Partial elf parser
• Userspace
• ATA Disk driver
• Fat32 (missing some features)
• userspace shell (cd, ls, cat, touch, mkdir)
• shared memory
• Graphical Window Server
• Basic networking: RTL8139 driver and userspace ping utility

Build prerequisites

On Debian

apt-get install gcc g++ make curl libmpc-dev nasm qemu-system-i386 dosfstools

On Windows

Firstly get the scoop package manager which can be found on Github, or manually install the following packages

scoop install nasm qemu msys2 

Then run msys2 and update pacman, then

pacman -S gcc make texinfo mpc-devel diffutils python3 dosfstools

If you used scoop in the first step you should also add the scoop shims to your path so you can access your scoop packages from msys2 bash

Build toolchain

cd toolchain
./build.sh full

Build DarkForest

export PATH="$LOCATION_OF_DARKFOREST_REPO/toolchain/cross/bin:$PATH"

# create filesystem image
fs_scripts/fs_setup.sh # needs root/administrator priv to mount fs

make

# copy files to filesystem image
./fs.sh # root/administrator priv

Run

./run.sh

Doom

There's a port of doomgeneric. To build the port:

cd doom/
./build.sh
# Download a WAD file (you can download the shareware version, `doom1.wad`) and put it in `doom/doomgeneric/doomgeneric`.
# sync file system image
./fs.sh
# Boot the system and type doom-wad in the terminal
# Play Doom :)

Networking

Setup packet routing through the host:

echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o <gateway_interface> -j MASQUERADE

I take a lot of inspiration from Andreas Kling's amazing SerenityOS - check it out!