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From: "Aritz Bastida" <aritzbastida@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: "Jan-Benedict Glaw" <jbglaw@lug-owl.de>
Subject: Re: MMAP: How a driver can get called on mprotect()
Date: Sun, 5 Mar 2006 19:40:18 +0100	[thread overview]
Message-ID: <7d40d7190603051040h17da06caw@mail.gmail.com> (raw)
In-Reply-To: <20060305182240.GH19232@lug-owl.de>

> Well, what hardware is it for and where can we download the driver to
> have a view at it? That'd probably help suggesting something...
>

Well actually is a virtual memory driver somewhat based on scullp
device in the book Linux Device Drivers 3rd edition.

Nonetheless the question is the same: a char device with mmap
implemented can get called any time a new vma is created or destroyed
(a process creating a new mmap):  vma_open() and vma_close().

But if a user process changes the mmap protections calling mprotect()?
How can the driver know about that? Is there any way to do that?

Thanks

  reply	other threads:[~2006-03-05 18:40 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-03-05 18:12 Aritz Bastida
2006-03-05 18:22 ` Jan-Benedict Glaw
2006-03-05 18:40   ` Aritz Bastida [this message]
2006-03-05 20:18     ` Brice Goglin

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