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Date:      Sun, 26 Nov 2023 15:52:05 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 275353] Boot loader crashes on AMD Ryzen 5 3600
Message-ID:  <bug-275353-227-3FUBCunIJU@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-275353-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-275353-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D275353

John F. Carr <jfc@mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jfc@mit.edu

--- Comment #5 from John F. Carr <jfc@mit.edu> ---
The bytes at eip encode

lock notl %edi

which is indeed an invalid instruction corresponding with int=3D6 (#UD) pri=
nted
above.

The byte sequence 0xf0, 0xf7, 0xd7 is also invalid in 16 bit mode.

--=20
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