From: cinap_lenrek@gmx.de (cinap_lenrek at gmx.de)
Subject: [9fans] self modifying code in intel vga bios?
Date: Tue, 8 Mar 2011 10:24:48 +0100 [thread overview]
Message-ID: <80ac49ab88c41d7cef9e96285eeb4c1b@gmx.de> (raw)
Fish- has catched this on a Intel(r)915GM/910ML/915MS Graphics Controller
with realemu:
bad mem write c0c11
bad memory access
1d17b0 4a008800 00000002 00000000 0000a002 00009000 00005108 ac007bda 00007bc0 0000 0000 0000 c000 csZoPdI 61ed c6 MOV CS:[c11], $01
question to the coreboot guys:
did you ever see the bios writing in the rom area?
i found this quote on: http://www.coreboot.org/VGA_support
"Even if your VGA BIOS uses self-modifying code you get a correct image"
i know that the rom area is usualy cached in ram but to catch mistakes
i disallow writing to the rom area... fish will make full traces
later this day... it could be just a screwup on my side...
just curious :)
--
cinap
next reply other threads:[~2011-03-08 9:24 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-08 9:24 cinap_lenrek at gmx.de [this message]
2011-03-08 9:45 ` Lucio De Re
2011-03-08 15:03 ` ron minnich
2011-03-08 15:21 ` Paul Lalonde
2011-03-08 15:27 ` Lucio De Re
2011-03-08 15:52 ` erik quanstrom
2011-03-08 17:34 ` Lucio De Re
2011-03-08 19:53 ` Wes Kussmaul
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=80ac49ab88c41d7cef9e96285eeb4c1b@gmx.de \
--to=cinap_lenrek@gmx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).