Copy relocation support for _r_debug

[H.J. Lu]

On Thu, Sep 23, 2021 at 10:24 AM Florian Weimer <fweimer@redhat.com> wrote:
>
> I think we lost copy relocation support for _r_debug.  We only update
> _r_debug_extended, so we have effectively created a rtld_hidden_proto
> alias here.
>
> Is this a problem?  I somehow missed this during review. 8-(

We have discussed it during Monday's patch review. I don't believe it is
a problem.  The _r_debug data used for copy relocation has been set up
before copy relocation is invoked.  The users of _r_debug only use the
value in the r_map field, not the address of the r_map field as shown in
the _r_debug tests in glibc.  The value of the r_map field in the _r_debug
copy is always the same as the internal _r_debug_extended.

-- 
H.J.