Re: [PATCH 2/3] objtool: check: Support addition to set CFA base

From: Josh Poimboeuf
Date: Fri Sep 18 2020 - 17:09:35 EST

On Tue, Sep 15, 2020 at 09:12:03AM +0100, Julien Thierry wrote:
> Instead of "mov SP, BP", a compiler could simply set BP
> to SP + constant. Handle changing the CFA base in such cases.

Rather than what a compiler _could_ do, it would be good to be specific
about when this can happen (presumably arm64).