Re: IFUNC resolver scheduling (bugs 21041, 20019)

[Florian Weimer <fweimer at redhat dot com>]

On 01/25/2017 05:36 PM, H.J. Lu wrote:
> On Wed, Jan 25, 2017 at 5:57 AM, Florian Weimer <fweimer@redhat.com> wrote:
> > In retrospect, adding IFUNCs as a user-visible feature looks like a mistake,
> > but now we have to live with them.
>
> Probably.  Now we are making it even more complex.  Doesn't it make the
> situation worse?

The x86-64 IFUNC resolvers rely on relocated data, which breaks existing 
binaries which worked before.  I'm trying to fix that.

Would you prefer that we rolled back the IFUNC resolver changes instead? 
 I have seen zero movement in that direction, so I assumed you would 
not consider this approach acceptable.

And it's not just x86-64.  I don't see a coordinated effort to comply 
with the requirements on IFUNC resolvers spelled out here:

  <https://sourceware.org/glibc/wiki/GNU_IFUNC>

(And this document is not particularly helpful as developer documentation.)

Thanks,
Florian