[patch] Use "new style" stubs on ppc too

[Rafael Espíndola via llvm-commits]

On 18 May 2016 at 06:58, Iain Sandoe <iain at codesourcery.com> wrote:
>
>> On 17 May 2016, at 17:18, Rafael Espíndola <rafael.espindola at gmail.com> wrote:
>>
>> X86 and ARM switched to using the same section for stubs of hidden and
>> non hidden symbols.
>>
>> This patch does the same for ppc.
>>
>> Cheers,
>> Rafael
>> <t.diff>
>
> Looks like a nice cleanup, it’s just a little hard to be certain of the consequences of the change:
>
> 1. The current behaviour does match what the last gcc-4.2 powerpc toolchain produces.
> 2. Did testing throw anything up? (I somehow doubt it without any runtime-tests)

No. In fact that one test that changes was added by me to show the
difference. It was completely untested.

> 3. If the symbol is visible, then it’s potentially interposed, so I guess the issue is whether the non_lazy_symbol_pointer section is writeable for that purpose, which means that dyld might be the determining factor.  (That it works with x86 [on darwin9?], suggests this is OK).  Probably, the best thing is to try some checks on older systems (will try to do that in the next few days).

Thanks!

Cheers,
Rafael