COMMITTED: Add support for STT_IFUNC

[Tristan Gingold]

On Dec 3, 2008, at 3:47 PM, Nick Clifton wrote:
>  Run-time relocations against this symbol type are placed into a new
>  section called .rel[a].ifunc.dyn which immediately follows the
>  .rel[a].dyn section.  The idea here is to allow the dynamic linker
>  to execute all of the normal dynamic relocations first, before it
>  tries to execute any of the STT_IFUNC using dynamic relocs.  This is
>  just in case the invoked STT_IFUNC function has any dependencies
>  upon other symbols.

Just another question.
I haven't look at the implementation, but is a STT_IFUNC allowed to  
have relocations
against STT_IFUNC symbols ?

If not, this is must be checked at link time, otherwise the entries  
must be topologically ordered.
It is expected that STT_IFUNC symbols be in a solib ? (would be fun!)

Tristan.