Hello, I was playing with adding Rust embedded in GRUB. I’ve pushed results to 2 repos: Module goes to https://github.com/phcoder/grub-rust-hello/tree/master Changes in GRUB are found at https://github.com/phcoder/GRUB/tree/rust Notes on implementation: Only i386-pc is implemented right now but it’s not a technical limit, just others are not implemented yet. I changed GRUB to use ET_DYN (.so) binaries as modules instead of ET_REL (.o). I disabled mregparm=3. -Z regparm=3 in Rust generally works but the calls to memcpy() still uses regparm=0 calling convention. Perhaps it’s a bug on Rust side, perhaps we need an adapter on our side. It’s compiled with panic=abort. Unwinding panics require rust_eh_personality that isn’t implemented yet. src/lib.rs is an example of hello world and grub_lib.rs is a grub-rust adapter. Ideally they should be in separate crates Every module now pulls in rust runtime. Idk how to switch to a shared runtime Consider it more an experiment and request for comments than a working product. I would be interested to hear any comments. Especially it’s interesting to hear from Rust folks as to how to make it more idiomatic Rust.
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