Re: [PATCH 05/15] x86: Implement function_nocfi

[Kees Cook]

On Fri, Apr 16, 2021 at 03:52:44PM -0700, Andy Lutomirski wrote:
> > > char entry_whatever[];
> > > wrmsrl(..., (unsigned long)entry_whatever);
> >
> > This is just casting. It'll still resolve to the jump table entry.
> 
> How?  As far as clang is concerned, entry_whatever isn't a function at
> all.  What jump table entry?

Whoops, sorry, I misread the [] as (). I thought you were just showing
an arbitrary function declaration, but I see what you mean now.

I am digesting the rest of your email now... :)

-- 
Kees Cook