RE: Questions on the stack for IA64

From: Chen, Kenneth W <kenneth.w.chen_at_intel.com>
Date: 2004-04-14 03:24:45
>>>>> Luck, Tony wrote on Tuesday, April 13, 2004 9:26 AM

> >Rahul Chaturvedi wrote on Monday, April 12, 2004 10:17 PM
> >d.) The pfs register seems to point to a location in
> >0xcxxxxxxxxxxxxxxx. Shouldn't this point to some
> >accessible memory location (from usermode)?
>
> someone else can take this one?

ar.pfs is not a memory address pointer. See section 3.1.8.10 of
ia64 software developer's manual, volume 1 for proper way to
decode that register (FYI, bit [63-62] is previous privilege
level, which is 3 in the above case).

- Ken


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Received on Tue Apr 13 13:26:24 2004

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