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MollenOS/Vali is a modern operating system that is built with focus on abstraction and a modular design, allowing anyone to port it to any architecture. It currently targets the x86-32 and x86-64 platform.

Home Page: http://www.mollenos.com

License: GNU General Public License v3.0

Assembly 1.94% C 81.08% C++ 15.18% Makefile 0.01% CMake 0.94% Shell 0.08% Python 0.35% Dockerfile 0.01% Pawn 0.03% Objective-C++ 0.08% Batchfile 0.01% Objective-C 0.06% Awk 0.22% CSS 0.01% HTML 0.01% Roff 0.01%

c c-plus-plus operating system os kernel drivers modular

mollenos's Introduction

The Mollen(/Vali) Operating System

MollenOS/Vali is an open-source operating system. The operating system is build with focus on modern principles. The inspiration for building this was originally to learn about operating system concepts and to learn from the complexity involved. I found out that building MollenOS was my passion, and I've been working on it since it was started in 2011. The primary goal of MollenOS is to provide a modern user experience, both from a development perspective, but also from a user perspective.

One of the core features of MollenOS is being completely immutable. The core operating system is packed into a read-only filesystem which gets mounted during boot. Applications are also packed into read-only filesystem images which get mounted when installed. This ensures that both the operating system and its software operate within as safe constraints as possible.

Current build status and nightly build download

Platform	Nightly Image (.img)	Status
i386	Builds
amd64	Builds

Noteable projects

Project	Link	Description
gracht	github	Protocol library heavily featured in MollenOS/Vali.
vioarr	github	Window manager with terminal and launcher built ontop of Gracht.
openlibm	github	Math library used in MollenOS
acpica	github	Open source ACPI library

Installing MollenOS

The recommended method for trying MollenOS is to download the nightly build above. This will provide you with an .img file that you can boot in either qemu or bochs emulators. (Or other that accept .img files).

If you need the vmdk format for VMware or VirtualBox, then you will have to follow the build guidelines on how to build the image for yourself.

MollenOS is not mature enought to be a daily driver, and thus no steps will be provided on how to install the OS onto your local computer, as this would not be wise for either of us. If you want to do this you should be tech-savvy enough to figure this out yourself.

Building MollenOS

Build instructions are located here BUILDING.md

Contributing

I appreciate any form for contribution you want to make to the project! The project is purely driven by passion, and I dedicate any and all available spare time to this project. But to take this project to the next level I need support! Contributions of any kind are deerly welcome, but should follow the below guidelines.

You can start contributing on any aspect of the operating system, and if you should ever be in doubt, feel free to email me at [email protected].

Submitting issues

When submitting issues, please take care that the issue is not a dublicate of an already existing, open issue. Please follow the templates specified for issues. Issues can be either a bug report or a feature request. If you feel like the feedback/issue you have does not fall into either category, pick the one you feel it fits the most.

Pull Requests

If you want to contribute as a developer on the project please fork the repository, and contribute via pull requests. There is a pull request template you can use when creating a pull request. Please allow for a day or two for me to review the pull request before accepting, as I will take a look as quickly as possible and submit your pull request.

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mollenos's Issues

PE - Cleanup on process cleanup

Executable data (PE) must be cleaned up on process cleanup

uhci - finish and test fsbr implementation

Needs to be completed, it enables fsbr, it also disables fsbr on bulk/control done transfers. But it does not handle disabling fsbr on removal of int's

XHCI Driver

We need an XHCI driver!

UHCI - Rewrite

We need to rewrite the current UHCI driver to the new coding format and then fix it. It had a lot of issues.

Memory - Implement MemoryQuery

HPET - Implement perf timers

We have periodic support, but we don't use ANY of the other gazillion timers it offers for perf

After idling for a moment the OS seems to stop scheduling threads

Reasonable enough it shuts down the scheduling timer when entering idle thread to avoid rescheduling the idle thread and save resources, however it seems like no interrupts follow as well.. Which is weird since i need interrupts to wakeup the scheduler again. I'm thinking of building a threading log so I can see all thread activity

UHCI - Isochronous support

Process cleanup

Processes don't get cleaned up yet, including address spaces

Better thread abstraction

UHCI - Fixup short/error transfer toggles

x86 - improve the representation of the system hardware hierarchy

Implement an SRAT enumeration support to build cpu/numa domain hierarchy
Improve the way we represent cpu's and cores in the kernel
Always enable x2apic mode if available

[acpi] implement ecdt driver for battery information

So we can get battery information

Revamp the VideoDevice

Needs to be so much prettier, and support our generic Read/Write/Query

Move modules to userspace

Several things needs to be done here,

Implement all neccessary syscalls (and there is a lot)
Move modules to have their own process with a event handler (Kill, Restart, etc events it should handle)
Move much of the shared functionality in to a library (fx: the list implementation is needed by drivers, and can't be imported if they run in usermode and list is in kernel mode memory)