From: d97svema@dtek.chalmers.se (Mattias Svensson)
Subject: Re: Ada OS Kernel features
Date: 7 Sep 2001 08:18:21 GMT
Date: 2001-09-07T08:18:21+00:00 [thread overview]
Message-ID: <slrn9ph0md.mou.d97svema@licia.dtek.chalmers.se> (raw)
In-Reply-To: 3b987e18.2182875@news.cis.dfn.de
In article <3b987e18.2182875@news.cis.dfn.de>, Dmitry Kazakov wrote:
>On Thu, 6 Sep 2001 19:06:29 +0100, "chris.danx"
><chris.danx@ntlworld.com> wrote:
>Any shared device should be not allowed to be directly used in the
>user mode. If a video driver operates in the user mode, then it is
>possible to have an application that reads and updates the parts of
>the screen of another application. Now consider that another
>application is a part of home-banking software. Wellcome in the
>MS-Windows world!
Why? If the video driver has exclusive access to the video memory and
just presents an API to other programs by some menas of IPC. In what
way is this different from having the video driver in the kernel?
The hard part I think is to give access to the video memory from
userspace.
//Mattias
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next prev parent reply other threads:[~2001-09-07 8:18 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-05 5:58 Ada OS Kernel features Brian Catlin
2001-09-05 10:15 ` Jacob Sparre Andersen
2001-09-05 11:16 ` Larry Kilgallen
2001-09-05 17:06 ` Brian Catlin
2001-09-06 14:35 ` Marin David Condic
2001-09-07 9:31 ` Tarjei T. Jensen
2001-09-05 17:55 ` David Starner
2001-09-05 18:42 ` Darren New
2001-09-12 6:47 ` Mats Karlssohn
2001-09-05 14:04 ` Ted Dennison
2001-09-05 17:23 ` Brian Catlin
2001-09-05 20:17 ` Ted Dennison
2001-09-05 21:10 ` Brian Catlin
2001-09-06 6:45 ` Tarjei T. Jensen
2001-09-06 6:56 ` Brian Catlin
2001-09-06 14:05 ` Ted Dennison
2001-09-05 16:02 ` Alfred Hilscher
2001-09-05 16:19 ` Jacob Sparre Andersen
2001-09-05 17:58 ` Brian Catlin
2001-09-05 17:44 ` Brian Catlin
2001-09-05 17:58 ` Darren New
2001-09-05 18:51 ` Larry Kilgallen
2001-09-05 19:25 ` chris.danx
2001-09-05 20:07 ` Darren New
2001-09-05 20:14 ` Larry Kilgallen
2001-09-06 13:45 ` Alfred Hilscher
2001-09-06 18:06 ` chris.danx
2001-09-06 19:41 ` Larry Kilgallen
2001-09-06 22:32 ` chris.danx
2001-09-07 11:04 ` Larry Kilgallen
2001-09-07 8:04 ` Dmitry Kazakov
2001-09-07 8:18 ` Mattias Svensson [this message]
2001-09-07 12:40 ` Dmitry Kazakov
2001-09-12 7:12 ` Mats Karlssohn
2001-09-05 20:18 ` Brian Catlin
2001-09-06 6:48 ` Ole-Hjalmar Kristensen
2001-09-06 6:59 ` Brian Catlin
2001-09-10 7:32 ` Ole-Hjalmar Kristensen
2001-09-06 13:42 ` Alfred Hilscher
2001-09-07 8:13 ` Dmitry Kazakov
2001-09-08 3:55 ` Kenneth Almquist
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