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libhermit-rs: A Rust-based library operting system

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Hermit Kernel

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This is the kernel of the Hermit unikernel project.

Requirements

Building the kernel

Usually the kernel will be linked as static library to your applications.

  • Rust applications: Instructions can be found in the hermit-rs repository.
  • For C/C++ applications: Instructions can be found in the hermit-playground repository.

Standalone static library build

cargo xtask build --arch x86_64

On completion, the script will print the path of libhermit.a. If you want to build the kernel for aarch64, please replace x86_64 by aarch64.

Control the kernel messages verbosity

This kernel uses the lightweight logging crate log to print kernel messages. The environment variable HERMIT_LOG_LEVEL_FILTER controls the verbosity. You can change it by setting it at compile time to a string matching the name of a LevelFilter. If the variable is not set, or the name doesn't match, then LevelFilter::Info is used by default.

$ HERMIT_LOG_LEVEL_FILTER=Debug cargo xtask build --arch x86_64

Credits

This kernel is derived from following tutorials and software distributions:

  1. Philipp Oppermann's excellent series of blog posts.
  2. Erik Kidd's toyos-rs, which is an extension of Philipp Opermann's kernel.
  3. The Rust-based teaching operating system eduOS-rs.

License

Licensed under either of

at your option.

Contribution

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.

The kernel is being developed on hermit-os/kernel. Create your own fork, send us a pull request, and chat with us on Zulip.

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libhermit-rs: A Rust-based library operting system

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