On Nov 16, 2006, at 10:15 AM, Joerg Sonnenberger wrote:

> On Thu, Nov 16, 2006 at 09:43:20AM -0800, Jason Thorpe wrote:
>> m68k platforms based on the Hibler pmap (i.e. all of them but sun2/
>> sun3/sun3x) have completely separate 32-bit address spaces for kernel
>> and user space.
>
> Is the kernel space using the full 32bit address space or only  
> 31bit? In
> the latter case, this would still catch the issues. Checking for
> overflows in the src domain would make sense as well.

Full separate 32-bit address space.  The Motorola MMU supports this.

-- thorpej