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SubjectRe: [PATCH] Pentium Pro - sysenter - doublefault
On Mon, Aug 25, 2003 at 07:29:05AM +0100, Jamie Lokier wrote:
> Jamie Lokier wrote:
> > So that means the sysenter instruction _does_ exist on the PPro and
> > early Pentium II, but it isn't usable.
>
> If anyone has information on what the SYSENTER and SYSEXIT
> instructions actually do on Intel Pentium Pro or stepping<3 Pentium II
> processors, I am very interested.

I dug up a little more from the archeological site (machine room -
sigh)...

-------------------------------------------
model name : Pentium II (Deschutes)
stepping : 2
$ ./syse
Segmentation fault
-------------------------------------------
model name : Celeron (Mendocino)
stepping : 0
cpu MHz : 334.097
$ ./syse
Segmentation fault
-------------------------------------------
CPU: Pentium II/Pentium II Xeon/Celeron (299.94-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x651 Stepping = 1
$ ./syse
Bus error (core dumped)
-------------------------------------------

The last one is a FreeBSD box.


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:.........................: putrid forms of man :
: Jakob Østergaard : See him rise and claim the earth, :
: OZ9ABN : his downfall is at hand. :
:.........................:............{Konkhra}...............:
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