Re: [PATCH v4 3/9] bpf/btf: Add a function to search a member of a struct/union

From: Steven Rostedt
Date: Wed Aug 02 2023 - 14:38:56 EST

On Wed, 2 Aug 2023 11:24:12 -0700
Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx> wrote:

> This is a non starter.
> bpf progs expect arch dependent 'struct pt_regs *' and we cannot change that.

If the progs are compiled into native code, isn't there optimizations that
could be done? That is, if ftrace_regs is available, and the bpf program is
just using the subset of pt_regs, is it possible that it could be compiled
to use ftrace_regs?

Forgive my ignorance on how BPF programs turn into executables when running
in the kernel.

-- Steve