* [Qemu-devel] FXSAVE doesn't #GP on alignment error
@ 2008-02-13 15:59 Vegard Nossum
2008-02-13 16:20 ` Michal Schulz
0 siblings, 1 reply; 2+ messages in thread
From: Vegard Nossum @ 2008-02-13 15:59 UTC (permalink / raw)
To: qemu-devel; +Cc: Pekka Enberg
Hello,
I am not sure if this should be treated as an error or not (it
definitely isn't critical), but I'll post it as an extra information
if it is useful or you think it should be fixed.
According to Intel manuals, the FXSAVE instruction requires the
argument to be 16-byte aligned. On a real machine, violating this
constraint results in a #GP. From experience, qemu will not enforce
this alignment constraint.
Kind regards,
Vegard Nossum
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [Qemu-devel] FXSAVE doesn't #GP on alignment error
2008-02-13 15:59 [Qemu-devel] FXSAVE doesn't #GP on alignment error Vegard Nossum
@ 2008-02-13 16:20 ` Michal Schulz
0 siblings, 0 replies; 2+ messages in thread
From: Michal Schulz @ 2008-02-13 16:20 UTC (permalink / raw)
To: qemu-devel
On Wednesday 13 February 2008, Vegard Nossum wrote:
> I am not sure if this should be treated as an error or not (it
> definitely isn't critical), but I'll post it as an extra information
> if it is useful or you think it should be fixed.
>
> According to Intel manuals, the FXSAVE instruction requires the
> argument to be 16-byte aligned. On a real machine, violating this
> constraint results in a #GP. From experience, qemu will not enforce
> this alignment constraint.
+1 from me.
--
Michal Schulz
^ permalink raw reply [flat|nested] 2+ messages in thread
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2008-02-13 15:59 [Qemu-devel] FXSAVE doesn't #GP on alignment error Vegard Nossum
2008-02-13 16:20 ` Michal Schulz
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