[patch] adjust libgloss addresses for 64-bit

[Thiemo Seufer]

Eric Christopher wrote:
> 
> > >  So what should "la $2,0x80000000($3)" do when using 64-bit addresses?  
> > > Replace/supplement the offset with a symbol as suitable...
> > 
> > Hm, looks like we break somebody's assumptions regardless what we do.
> > So leaving la as it is and warn about its use seems to be best.
> 
> 
> To warn we should do two things:
> 
> 1) Turn HAVE_64BIT_OBJECTS back to HAVE_64BIT_ADDRESSES in do_la.
> 2) Warn if we have O_constant as the type and it isn't a sign-extended
> 32-bit number.

Agreed. Maybe we can make la invalid for 64bit register after 2.16.


Thiemo