protected data in a DSO with copy relocation

[H.J. Lu]

On Wed, Dec 17, 2014 at 2:53 PM, Roland McGrath <roland@hack.frob.com> wrote:
>> I'd like to have a decision on
>>
>> https://sourceware.org/bugzilla/show_bug.cgi?id=17711
>>
>> If we want to support protected data in a DSO with copy relocation,
>> which will incur run-time and memory overhead, I can prepare ld.so
>> as well as linker patches.  Otherwise, I will make a linker patch
>> to disallow protected data in a DSO with copy relocation.
>
> I think we certainly shouldn't do any rtld changes for this in the current
> cycle.  If we can just punt thinking about it at all until after this

If we punt, we need to update the elf/vismain test which fails with
the current ld.

> release, that would be best.  If we need some kind of decision sooner, then
> my inclination is to say that STV_PROTECTED is not useful enough to spend
> effort on supporting its corner cases.  I'm not aware of uses cases for it
> that both appear in the real world and are actually worthwhile.  But if
> there is no urgent need, then let's discuss this in detail after the release.

I agree.

-- 
H.J.