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souvik1997 / kernel-roulette

A kernel module written in Rust

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Undefined symbols

iakshay opened this issue · comments

commented

Hi,

The make succeeds for me, but I'm getting the following warnings. Any idea on what could be going wrong here?

I'm using rust nightly (1.35), clang 5.0 and linux kernel 4.20.6+.

WARNING: "sample" [/usr/src/kernel-roulette/build/roulette.ko] undefined!
WARNING: "get_chance" [/usr/src/kernel-roulette/build/roulette.ko] undefined!
WARNING: "rust_mod_init" [/usr/src/kernel-roulette/build/roulette.ko] undefined!
WARNING: "rust_mod_exit" [/usr/src/kernel-roulette/build/roulette.ko] undefined!

Thanks!

commented

@iakshay
The build operation looks incomplete.
You should find an error when you do 'insmod'.
The cause of the error is the behavior of Makefile.build in "/lib/modules/uname -r/build/scripts".
A linker doesn't link ".a" files because this Makefile ignores (filters) ".a" files.

Please try to apply this patch to fix this problem.
https://gist.github.com/4ge32/6b4a58fbfce3c5b6ac3012a93f400263