Ronald G Minnich <[EMAIL PROTECTED]> writes: > On 5 Jul 2002, Eric W. Biederman wrote: > > > You get spaces, but you don't exactly get useful red-zones, unless the > > hardware also raises exceptions when you write to unmapped memory, (A > > tricky thing to do). With a virtual page in between the archtecture > > gives you an exception on accesses to unmapped addresses. > > I think you should get an error on memory accesses if no device responds > to the PCI FRAME# signal. I/O is different, but I do believe memory causes > a fault when you address something that is not there. > > Or am I wrong on this?
It depends on the architecture. In particular x86 doesn't do that, it fails silently. I believe alpha will give you a processor exception. Eric
