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

From: Steven Rostedt
Date: Tue Aug 01 2023 - 20:44:17 EST

On Tue, 1 Aug 2023 20:40:54 -0400
Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:

> Maybe we can add a ftrace_partial_regs(fregs) that returns a
> partially filled pt_regs, and the caller that uses this obviously knows
> its partial (as it's in the name). But this doesn't quite help out arm64
> because unlike x86, struct ftrace_regs does not contain an address
> compatibility with pt_regs fields. It would need to do a copy.
> ftrace_partial_regs(fregs, &regs) ?

Well, both would be pointers so you wouldn't need the "&", but it was
to stress that it would be copying one to the other.

void ftrace_partial_regs(const struct ftrace_regs *fregs, struct pt_regs regs);

-- Steve