Ironclad is a formally verified, real-time capable, UNIX-like operating system kernel for general-purpose and embedded uses. It is written in SPARK and Ada, and is comprised of 100% free software.
Ironclad features a familiar POSIX-compatible interface, true simultaneous preemptive multitasking, Mandatory Access Control (MAC), and support for hard real-time scheduling.
Why Choose Ironclad?
Free as in freedom
Ironclad is fully open source and distributed under the GPLv3, ensuring it remains free. No firmware blobs are needed or shipped with the kernel. Every piece of the stack is open source.
Formal verification
SPARK's state of the art formal verification is employed for ensuring absence of errors and correctness of huge swathes of Ironclad, like cryptography, MAC, and user-facing facilities.
Portable
Ported to several platforms and boards, and designed to be easily portable to many more. Dependency on only the GNU toolchain allows for easy cross-compilation.
Distributions and ecosystemWho pays for Ironclad?
Ironclad will always be free for use, study, and modification, so, to support the project, we rely on the use of donations and grants. Every contribution makes a difference and allows us to do more.