On Jul 5, 2005, at 2:18 AM, Alan Barrett wrote:

> This is not easy in the general case, because kernel-level emulation
> data is maintained per process, not for finer-grained memory regions
> within a process.

More to the point, emulation is done at the system call level.  (2b)  
will almost certainly never work in the general case, because the  
ABIs are likely to be different.

-- thorpej