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Abandoned overcomplicated Microkernel using modern x86_64 features

License: BSD 2-Clause "Simplified" License

C 1.81% C++ 94.27% Assembly 2.59% Meson 1.32% Shell 0.02%
microkernel sigma-os os osdev kernel cpp

sigma's Introduction

Sigma 🚀

Sigma OS is located in this repo

It is an x86_64 (semi)POSIX (semi)Microkernel but still in early development

How to build

Look in sigma-os/bootstrap

Features

  • Full x86_64 long mode support
  • Support for a lot of x86(_64) minor features (e.g. SMEP, SMAP, PCID and x2APIC)
  • ACPI and AML support with lai
  • APIC support + LAPIC timer for scheduling IRQs
  • PCI / PCI-Express Configuration space enumeration
  • SMP + Simple Queue based scheduler
  • Dynamically linked userland backed by mlibc
  • Modern disk drivers (AHCI, NVMe)
  • Virtualization (AMD-V only for now)
  • Protection against malicious drivers with IOMMU (VT-d only for now)

Notes

  • Sigma does try to have as much drivers and things in userspace(PL3) but it doesn't attempt to move the memory manager and process management / scheduler out of the kernel.

  • When running vbox use the ich9 chipset, if you must use the piix3 chipset you need to explicitly enable the HPET with this command VBoxManage modifyvm <your vm name> --hpet on

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