[rfa:ppc64] Use target in convert_from_func_ptr_addr

[Kevin Buettner]

On Oct 23, 12:26pm, Andrew Cagney wrote:

> > On Oct 22,  9:37pm, Andrew Cagney wrote:
> > 
> > 
> >> The attached rewrites the PPC64 GNU/Linux convert_from_func_ptr_addr 
> >> method so that it makes use of the explicit "struct target_ops" 
> >> parameter  I recently added (previously it was indirectly using 
> >> current_target).
> 
> > 
> > IMO, this version of the code is harder to read than the old version.
> > 
> > Can you explain what using an explicit `struct target_ops'' parameter
> > buys us?
> 
> By using the explicit "struct target_ops", I've eliminated the 
> assumption that the _single_ _global_ current_target contains the 
> function descriptor.

Yes.  But what does this buy us?  I.e, what will we be able to do after
this patch that we couldn't do before?

Kevin