Tock is an embedded operating system designed for running multiple concurrent, mutually distrustful applications on Cortex-M and RISC-V based embedded platforms. Tock's design centers around protection, both from potentially malicious applications and from device drivers. Tock uses two mechanisms to protect different components of the operating system. First, the kernel and device drivers are written in Rust, a systems programming language that provides compile-time memory safety and type safety. Tock uses Rust to protect the kernel (e.g. the scheduler and hardware abstraction layer) from platform specific device drivers as well as isolate device drivers from each other. Second, Tock uses memory protection units to isolate applications from each other and the kernel.

Tock 2.x!

Tock is now on its second major release! For a summary of the latest new features and improvements, check out the changelog.

Getting Started

There are a variety of resources for learning about Tock, contributing to the project, and getting help.

• About Tock
  • The Tock Book: online tutorials and documentation
  • Getting Started with Secure Embedded Systems: Tock textbook
• Developing Tock
  • Tock API Docs
  • Contributing Guide
  • Code Review Guidelines
• Getting Help
  • Slack Channel
  • Email List
  • Tock Blog
  • @talkingtock

Code of Conduct

The Tock project adheres to the Rust Code of Conduct.

All contributors, community members, and visitors are expected to familiarize themselves with the Code of Conduct and to follow these standards in all Tock-affiliated environments, which includes but is not limited to repositories, chats, and meetup events. For moderation issues, please contact members of the @tock/core-wg.

Cite this Project

Amit Levy, Bradford Campbell, Branden Ghena, Daniel B. Giffin, Pat Pannuto, Prabal Dutta, and Philip Levis. 2017. Multiprogramming a 64kB Computer Safely and Efficiently. In Proceedings of the 26th Symposium on Operating Systems Principles (SOSP ’17). Association for Computing Machinery, New York, NY, USA, 234–251. DOI: https://doi.org/10.1145/3132747.3132786

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.