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README.md

The seL4 Repository

This repository contains the source code of seL4 microkernel.

For details about the seL4 microkernel, including details about its formal correctness proof, please see the sel4.systems website and associated FAQ.

DOIs for citing recent releases of this repository:

  • DOI

We welcome contributions to seL4. Please see the website for information on how to contribute.

This repository is usually not used in isolation, but as part of the build system in a larger project.

Manual

A hosted version of the manual for the most recent release can be found here.

Repository Overview

  • include and src: C and ASM source code of seL4
  • tools: build tools
  • libsel4: C bindings for the seL4 ABI
  • manual: LaTeX sources of the seL4 reference manual

Build Instructions

See the seL4 website for build instructions.

License

The files in this repository are released under standard open source licenses, identified by SPDX license tags. Generally, kernel-level code is licensed under GPLv2 and user-level code under the 2-clause BSD license. See the individual file headers for details, or use one of the publicly available SPDX tools to generate a bill of materials. The directory LICENSES contains the text for all licenses that are mentioned by files in this repository.

GPL syscall note

Note that, as in the Linux syscall note for the GPL, the seL4 kernel GPL license does not cover user-level code that uses kernel services by normal system calls - this is merely considered normal use of the kernel, and does not fall under the heading of "derived work". Syscall headers are provided under BSD.