[Bug 266730] powerpc kernel crash on loadable modules that use copyin/copyout ifunc

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=266730

--- Comment #1 from Alfredo Dal'Ava Junior <alfredo@freebsd.org> ---
Links related to the issue:

First (naive) attempt to fix: https://reviews.llvm.org/D133745
LLD reproduce tarball: https://github.com/llvm/llvm-project/issues/57722
Userland test case (try to reproduce similar issue):
https://github.com/llvm/llvm-project/issues/57851

Problem isn't seen when kernel is linked with LLD9. LLVM/LLD behavior change
was identified as due to commit:
https://reviews.llvm.org/rGdc06b0bc9ad055d06535462d91bfc2a744b2f589

The discussion with LLVM community is still ongoing. The following temporary
workaround was proposed on FreeBSD side: 

https://reviews.freebsd.org/D36234

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