> The only chance at a workaround to net-boot would thus probably be
> to construct an XCOFF version of the kernel itself, and in my 1.4.3
> installation I currently lack the tools to do that (objcopy needs
> support for aixcoff-rs6000, for one).  (There's also the issue of
> whether the kernel would be invoked "correctly"...)

Note: Once Upon A Time, I actually *did* this.  There are a couple of
issues:

* You have to apply the same hackery to the executable header that's
  done for ofwboot.xcf, because the ROM wants a certain set of bits
  that binutils doesn't use.

* ISTR there is a limitation on how large the kernel can be, but I
  forget the details.

It's a pretty silly hack all around.