I don't know about Redox, but Phil's Rust OS (http://os.phil-opp.com/ http://os.phil-opp.com/) seems to manage to minimize unsafe Rust and only use it to create

I don't know about Redox, but Phil's Rust OS (http://os.phil-opp.com/ http://os.phil-opp.com/) seems to manage to minimize unsafe Rust and only use it to create some low level OS abstractions that can be safely used. It's pretty neat.