Does bcc support calling kfuncs?

[thejh]

I'm trying to write BPF code that calls a kfunc (by kfunc I mean "kernel function callable from BPF", not "kernel function hooked by BPF"); but I can't figure out how to make that work. When I declare the kfunc as an extern function with __attribute__((section(".kyms"))) and call it, I get a compiler error saying "cannot call non-static helper function". Is it just not possible to call kfuncs from code built with bcc, or am I doing it wrong?

[yonghong-song]

Sorry, bcc does not support kfunc. It need some effort to implement it. libbpf-tools supports kfunc.

[thejh]

Thanks for the information!