Can I use eBPF to replace a kernel function?

Can I use eBPF to reimplement a kernel function and jump to the reimplemented function when the original function is called, skipping t开发者_如何学Che original function altogether?

For example, there is a kernel function A:

void A() 
{
    xxx;
}

Can I use eBPF to reimplement function A as ebpf_A, so that when function A is called, ebpf_A is executed instead of A? So I can do some other things in ebpf_A.

If I can, how can I do it?