Re: [RFC PATCH 5/5] selftest/x86: Add CET quick test

Yu-cheng Yu
2020-05-22T18:08:55Z

On Fri, 2020-05-22 at 10:36 -0700, Kees Cook wrote:
> On Fri, May 22, 2020 at 07:27:11PM +0200, Peter Zijlstra wrote:
> > On Fri, May 22, 2020 at 10:22:51AM -0700, Kees Cook wrote:
> >
> > > But yes, I think getting a copy of asm.h would be nice here. I don't
> > > think the WRITE_ONCE() is needed in this particular case. Hmm.
> >
> > Paranoia on my end because I had no clue wth he wanted with his -O0
> > magic gunk.
>
> Heh, yes, which is why I asked for many more comments. ;) I *think* it
> was entirely to control the stack (and ssp) behavior (i.e. don't inline,
> don't elide unused stack variables, etc).

Yes, that was the reason.

Yu-cheng