Messages in this thread | | | From | Sami Tolvanen <> | Date | Mon, 10 Oct 2022 16:15:33 -0700 | Subject | Re: [PATCH v10 25/27] x86: enable initial Rust support |
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On Fri, Oct 7, 2022 at 10:18 AM Peter Zijlstra <peterz@infradead.org> wrote: > > On Tue, Sep 27, 2022 at 03:14:56PM +0200, Miguel Ojeda wrote: > > Note that only x86_64 is covered and not all features nor mitigations > > are handled, but it is enough as a starting point and showcases > > the basics needed to add Rust support for a new architecture. > > Does it fail the build if required options are missing? Specifically are > things like kCFI and IBT enabled? Silently not handling those will > result in an unbootable image.
Rust supports IBT with -Z cf-protection=branch, but I don't see this option being enabled in the kernel yet. Cross-language CFI is going to require a lot more work though because the type systems are not quite compatible:
https://github.com/rust-lang/rfcs/pull/3296
Sami
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