[RFA] Update OpenBSD/mips64 support

[Mark Kettenis]

   From: Eric Christopher <echristo@redhat.com>
   Date: Wed, 13 Apr 2005 15:39:16 -0700

   On Thu, 2005-04-14 at 00:37 +0200, Mark Kettenis wrote:
   >    From: Eric Christopher <echristo@redhat.com>
   >    Date: Wed, 13 Apr 2005 15:30:53 -0700
   > 
   >    > +	  mips64*-openbsd*)
   >    > +	    mips_default_abi=N64_ABI
   >    > +	    ;;
   > 
   >    Not n32?
   > 
   > Nope.  OpenBSD/sgi is fully 64-bit.  Don't think it even can execute
   > 32-bit code.

   n32 is 32-bit pointers and 64-bit registers. 64-bit registers are
   required. It's also a heck of a lot faster than n64 :)

And a bit of a security nightmare if you have a 64-bit kernel...
That's why OpenBSD doesn't do it that way.  It's a deliberate choice ;-).

Mark