From: "Guillaume Lancelin" <guillaumelancelin@yahoo.es>
To: linux-kernel@vger.kernel.org
Subject: Memory access
Date: Tue, 3 Jul 2001 16:45:32 +0200 (CEST) [thread overview]
Message-ID: <20010703144532.11007.qmail@web4201.mail.yahoo.com> (raw)
Writing a device driver for a IO card, I have the following message from
the kernel:
Unable to handle kernel paging request at virtual address 000d0804.
[then it gives the register values]
Segmentation fault."
This address (0xd0804) is the location of a "mailbox" reserved by the IO
card, and from which commands are passed to the card.
My question: is the kernel using or protecting this area of the memory,
and is there a way to deprotect it??? (how dangerous!)
Thanks
Guillaume
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next reply other threads:[~2001-07-03 14:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-03 14:45 Guillaume Lancelin [this message]
2001-07-03 14:51 ` Arnaldo Carvalho de Melo
2001-07-03 14:54 ` Brian Gerst
2001-07-03 14:56 ` Eli Carter
2001-07-03 14:57 ` Richard B. Johnson
2001-07-03 15:33 ` Alan Cox
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