Writing Rust modules for the xv6 kernel
After my last blogpost showing how to compile and link Rust code for the x86 xv6 kernel (using C FFI), in this post I show how to code your own networking stack, and then show a working http server using smoltcp.
Writing Rust modules for the xv6 kernel launched on December 1, 2025 with 5 votes, #2,550 of 11,628 launches that month and more than 75% of that year's launches.
What it does
In this short guide I will go over adding Rust “modules” to a base xv6 kernel for the x86 target (although it could be adapted to RISC-V with minimal changes). While xv6 doesn’t really support “modules” in the same way that the Linux kernel does, here I describe a module simply as a subsystem of the kernel that in this case will be completely done in Rust. mkdir rustmod cd rustmod cargo init --lib Cargo And make this your Cargo.toml : [ package ] name = "rustmod" version = "0.1.0" edition = "2021" [ lib ] crate-type = [ "staticlib" ] [ profile . release ] panic = "abort" lto = true codegen-units = 1 And make this your .cargo/config.toml [ build ] target = "i686-unknown-linux-gnu" [ target .…from alessandroferrari.live
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