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List:       vbox-dev
Subject:    [vbox-dev] CPUID interception from Ring 3 in Raw Mode [Linux 32 bit Guests]
From:       Suman Saraf <sumansaraf () gmail ! com>
Date:       2019-09-30 14:45:31
Message-ID: CAMnSJfMO_vOG9fWsu1FkzdxnhV4yX6mtog9qkcBfTGWM1ikTxg () mail ! gmail ! com
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Hello,

Does VirtualBox intercept/patch CPUID instructions from R3 code in Linux 32
bit guests under any circumstances? I am wondering if CSAM/PATM are
deployed in any cases to scan and patch R3 code specifically.

Thanks
Suman

[Attachment #5 (text/html)]

<div dir="ltr"><div class="gmail_default" \
style="font-family:monospace,monospace;font-size:small">Hello,</div><div \
class="gmail_default" \
style="font-family:monospace,monospace;font-size:small"><br></div><div \
class="gmail_default" style="font-family:monospace,monospace;font-size:small">Does \
VirtualBox intercept/patch CPUID instructions from R3 code in Linux 32 bit guests \
under any circumstances? I am wondering if CSAM/PATM are deployed in any cases to \
scan and patch R3 code specifically.</div><div class="gmail_default" \
style="font-family:monospace,monospace;font-size:small"><br></div><div \
class="gmail_default" \
style="font-family:monospace,monospace;font-size:small">Thanks</div><div \
class="gmail_default" \
style="font-family:monospace,monospace;font-size:small">Suman</div><div \
class="gmail_default" \
style="font-family:monospace,monospace;font-size:small"><br></div></div>



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