Re: [RFC][PATCH] objtool: STAC/CLAC validation

Peter Zijlstra
2019-02-23T08:39:51Z

On Fri, Feb 22, 2019 at 03:39:48PM -0800, hpa@zytor.com wrote:
> Objtool could also detect CLAC-STAC or STAC-CLAC sequences without
> memory operations and remove them; don't know how often that happens,
> but I know it *does* happen.

Objtool doesn't know about memops; that'd be a lot of work. Also,
objtool doesn't actually rewrite the text, at best it could warn about
such occurences.