Re: RFC: Update x86 psABI to support shadow stac

["H.J. Lu" <hjl.tools@gmail.com>]

On Thu, Jun 22, 2017 at 5:51 AM, Florian Weimer <fweimer@redhat.com> wrote:
> On 06/21/2017 05:25 PM, H.J. Lu wrote:
>> GNU_PROPERTY_X86_FEATURE_1_SHSTK is set on output only if it is set on
>> all relocatable inputs, which means that the C library must be compiled
>> with SHSTK-enabled compiler.
>
> I don't think this is sufficiently detailed for an ABI specification.
> It needs to say what an SHSTK-enabled compiler does.

Compilers just need to make return address popped from shadow
stack match return address popped from normal stack.

-- 
H.J.