> The only difference I found is libsa's assumes you can allocate memory by
> grabbing it above the loader, while macppc's called OF_claim to get it.
> Could others please check this (in libsa's look at the use of the top
> pointer)?

It could easily be the lack of OF_claim.  PSIM detected a bug in the 
kernel where the kernel assumed it could just access memory beyond the 
end of BSS.  That memory, by definition, wasn't mapped to anything.

This sounds similar.

Andrew