Messages in this thread |  | | | Date | Wed, 24 Sep 2008 21:38:51 -0700 | | From | "H. Peter Anvin" <> | | Subject | Re: [PATCH 1/2] VMware detection support for x86 and x86-64 |
Alok kataria wrote:
>
> Even if there is anything on that port on native hardware it would
> work perfectly well and is _safe_.
> First let me post the code to access this backdoor port (the way it
> should really be done )
>
> So whenever we query port 0x5658 , with the GETVERSION command (which
> is the first thing we do with this port), we expect that eax !=
> 0xFFFFFFFF and ebx has a VMWARE specific MAGIC value. Please note
> that ebx has been initialized to zero in the code above.
>
You have no idea what you just did to a real piece of hardware.
-hpa
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