From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,6394e5e171f847d1 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2001-09-07 01:18:28 PST Path: archiver1.google.com!newsfeed.google.com!newsfeed.stanford.edu!logbridge.uoregon.edu!newsfeed.sunet.se!news01.sunet.se!news.chalmers.se!d97svema From: d97svema@dtek.chalmers.se (Mattias Svensson) Newsgroups: comp.lang.ada Subject: Re: Ada OS Kernel features Date: 7 Sep 2001 08:18:21 GMT Organization: Datateknologsektionen, Chalmers univ. of Technology Message-ID: References: <9n4euv$t9m$1@slb6.atl.mindspring.net> <3B964C7A.BC04374E@icn.siemens.de> <9n5o9n$37a$1@slb7.atl.mindspring.net> <3%ul7.3362$9z1.440040@news6-win.server.ntlworld.com> <3b987e18.2182875@news.cis.dfn.de> NNTP-Posting-Host: licia.dtek.chalmers.se X-Trace: nyheter.chalmers.se 999850701 7830 129.16.30.88 (7 Sep 2001 08:18:21 GMT) X-Complaints-To: abuse@chalmers.se NNTP-Posting-Date: 7 Sep 2001 08:18:21 GMT User-Agent: slrn/0.9.6.2 (SunOS) Xref: archiver1.google.com comp.lang.ada:12867 Date: 2001-09-07T08:18:21+00:00 List-Id: In article <3b987e18.2182875@news.cis.dfn.de>, Dmitry Kazakov wrote: >On Thu, 6 Sep 2001 19:06:29 +0100, "chris.danx" > 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 -- He's fast, he's strong, he's TCP/IP and he knows your address -----------------------------------\ Warriors of the net /- email: d97svema@dtek.chalmers.se sms: d97svema+sms@dtek.chalmers.se