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Re: Proposal for STT_GNU_IFUNC and R_*_IRELATIVE
On Tue, May 26, 2009 at 9:30 AM, Ian Lance Taylor <iant@google.com> wrote:
> "H.J. Lu" <hjl.tools@gmail.com> writes:
>
>> I don't see the fundamental difference between the new relocation and
>> the new DT_* tags. The end result is the same. If your OS doesn't support
>> them, the application will crash if they are used. I will propose a new
>> x86-64 psABI extension, which will be optional. If an OS supports
>> STT_GNU_IFUNC, it must support R_X86_64_IRELATIVE.
>
> One difference is that a new relocation has to be defined for every
> processor ABI separately. ?New DT_* tags can be defined once.
>
Sure. But R_*_IRELATIVE is much simpler to implement in static and
dynamic linkers.
--
H.J.