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From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Fri, 22 Mar 2024 09:52:32 -0700
Message-ID: <CAMe9rOrZ8XDoeDru+zm1ad7NsLHgkD1cm=CL==uhWY4OqqQGJg@mail.gmail.com>
Subject: Re: [PATCH] x86/shstk: Enable shadow stack for x32
To: Dave Hansen <dave.hansen@intel.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org, 
	Rick P Edgecombe <rick.p.edgecombe@intel.com>
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On Fri, Mar 22, 2024 at 9:49=E2=80=AFAM Dave Hansen <dave.hansen@intel.com>=
 wrote:
>
> On 3/15/24 07:04, H.J. Lu wrote:
> > 1. Add shadow stack support to x32 signal.
> > 2. Use the 64-bit map_shadow_stack syscall for x32.
> > 3. Set up shadow stack for x32.
> >
> > Tested with shadow stack enabled x32 glibc on Intel Tiger Lake.
>
> I don't think we should wire up code that's never going to get used in
> practice.  I think I'd want to be sure of the existence of some
> specific, real-world, long-term users of this before we add a new ABI
> that we need to support forever.
>
> Are there real users?

Were you talking about x32 users or x32 users with shadow stack?

--=20
H.J.