RFC: Add GNU_PROPERTY_NEED_PHDRS

[H.J. Lu]

On Tue, Oct 2, 2018 at 8:13 AM Michael Matz <matz@suse.de> wrote:
>
> Hi,
>
> On Tue, 2 Oct 2018, H.J. Lu wrote:
>
> > A .note.gnu.property section will lead to a read-only data PT_LOAD segment
> > as the first PT_LOAD segment:
>
> Yes, and it's a hack.  This section isn't necessary, it merely is the
> easiest (?) way you found to force ld to create the PT_LOAD segment you
> want.  What about linker scripts that filter out all .note sections?  You
> _still_ want the phdrs to be mapped in that case.  You basically replace
> the current state (where the phdrs are mapped by accident) with a
> different state that still only works by accident.  It would be better to
> make this work by design not accident.
>

If linker script discards a section, all bets are off.  Anything can happen.

-- 
H.J.