Re: [PATCH v11 8/9] x86/vdso: Insert endbr32/endbr64 to vDSO

[Yu, Yu-cheng]

On 8/24/2020 5:33 PM, Andy Lutomirski wrote:
> On Mon, Aug 24, 2020 at 5:30 PM Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx> wrote:
> > From: "H.J. Lu" <hjl.tools@xxxxxxxxx>
> >
> > When Indirect Branch Tracking (IBT) is enabled, vDSO functions may be
> > called indirectly, and must have ENDBR32 or ENDBR64 as the first
> > instruction.  The compiler must support -fcf-protection=branch so that it
> > can be used to compile vDSO.
> >
> > Signed-off-by: H.J. Lu <hjl.tools@xxxxxxxxx>
> > Signed-off-by: Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx>
> > Acked-by: Andy Lutomirski <luto@xxxxxxxxxx>
>
> I revoke my Ack.  Please don't repeat the list of object files.  Maybe
> add the option to CFL?

I will update the patch.

Yu-cheng