Official repo of the BareMetal exokernel. It's written from scratch in Assembly, designed for x86-64 hardware, with no dependencies except for the virtual/physical hardware. A 64-bit ARMv8 version is also planned.

BareMetal is a very lean kernel. The name is a play on the phrase "bare metal" which means to run directly on physical or virtualized hardware. BareMetal also only offers the "bare essentials" required for a working operating system.

BareMetal provides basic support for symetric multiprocessing, network, and disk access via a low-level abstraction layer.

• 64-bit: Make use of the extra-wide and additional registers available in 64-bit mode.
• Mono-processing, multi-core: The system is able to execute a single "program" but can spread the work load amongst available CPU cores.
• Extremely tiny memory footprint: A minimal bootable image, including bootloader and operating system components, is currently 16K.
• Standard C library using newlib from Red Hat
• Real hardware and VirtualBox support with full virtualization, using x86 hardware virtualization whenever available (it is on most modern x86-64 CPU's). In principle BareMetal should run on any x86-64 hardware platform, even on a physical x86-64 computer, given appropriate drivers. Officially, we develop on QEMU and VirtualBox, which means that you can run BareMetal on both Linux, Microsoft Windows, and Apple OS X.

• NASM (The Netwide Assembler) - At least version 2.07
• That's it!

Execute the build script:

./build_x86-64.sh

The easiest way to get started is with QEMU:

qemu-system-x86_64 -machine q35 -cpu core2duo -smp 2 -m 1024 -kernel ./boot.bin -s

// EOF