From: "David S. Miller" <davem@redhat.com>
To: alan@lxorguk.ukuu.org.uk
Cc: bidulock@openss7.org, linux-kernel@vger.kernel.org
Subject: Re: export of sys_call_table
Date: Fri, 04 Oct 2002 14:06:29 -0700 (PDT) [thread overview]
Message-ID: <20021004.140629.89147658.davem@redhat.com> (raw)
In-Reply-To: <1033682560.28850.32.camel@irongate.swansea.linux.org.uk>
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: 03 Oct 2002 23:02:40 +0100
Overwriting syscall table entries is not safe. Its not safe because
there is no locking mechanism, and its not safe because of the pentium
III errata.
It is also non-portable, such syscall overwriting requires knowledge
of the layout of the table on every architecture. On some platforms
it is a list of pointers + argument count, on some 64-bit platforms
it is a list of 32-bit truncated pointers to save space.
There is simply no portable way to make changes to the system call
table, so exporting it makes zero sense.
next prev parent reply other threads:[~2002-10-04 21:08 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-03 21:39 export of sys_call_table Brian F. G. Bidulock
2002-10-03 22:02 ` Alan Cox
2002-10-03 23:06 ` Brian F. G. Bidulock
2002-10-04 9:10 ` Arjan van de Ven
2002-10-04 11:19 ` Brian F. G. Bidulock
2002-10-04 11:31 ` Arjan van de Ven
2002-10-04 11:55 ` Brian F. G. Bidulock
2002-10-04 13:00 ` Alan Cox
2002-10-03 23:10 ` Michal Jaegermann
2002-10-04 0:32 ` Andy Pfiffer
2002-10-04 9:20 ` Arjan van de Ven
2002-10-06 14:17 ` Kasper Dupont
2003-01-03 8:28 ` Eric W. Biederman
2002-10-04 21:06 ` David S. Miller [this message]
2002-10-04 21:44 ` Brian F. G. Bidulock
2002-10-12 5:43 ` Eric Blade
2002-10-03 22:14 ` Robert Love
2002-10-03 22:23 ` Robert Love
2002-10-03 22:24 ` Patrick Mochel
2002-10-03 22:15 ` Greg KH
2002-10-03 22:27 ` Dave Jones
2002-10-03 22:27 ` Robert Love
2002-10-03 22:58 ` John Levon
2002-10-03 23:10 ` Alexander Viro
2002-10-03 23:14 ` John Levon
2002-10-04 4:05 ` Muli Ben-Yehuda
2002-10-04 4:46 ` Greg KH
2002-10-04 4:53 ` Muli Ben-Yehuda
2002-10-03 23:35 ` Dave Jones
2002-10-03 23:50 ` John Levon
2002-10-04 0:17 ` Brian F. G. Bidulock
[not found] ` <mailman.1033691043.6446.linux-kernel2news@redhat.com>
2002-10-04 4:03 ` Pete Zaitcev
2002-10-04 5:32 ` Brian F. G. Bidulock
2002-10-04 11:42 ` John Levon
2002-10-04 12:03 ` Brian F. G. Bidulock
2002-10-04 13:02 ` Alan Cox
2002-10-04 17:36 ` Pete Zaitcev
2002-10-05 1:39 ` John Levon
2002-10-04 13:58 ` Christoph Hellwig
2002-10-04 15:15 ` Brian F. G. Bidulock
2002-10-04 15:28 ` Christoph Hellwig
2002-10-04 16:19 ` Brian F. G. Bidulock
2002-10-04 16:25 ` Christoph Hellwig
[not found] <20021003153943.E22418@openss7.org.suse.lists.linux.kernel>
[not found] ` <1033682560.28850.32.camel@irongate.swansea.linux.org.uk.suse.lists.linux.kernel>
[not found] ` <20021003170608.A30759@openss7.org.suse.lists.linux.kernel>
[not found] ` <1033722612.1853.1.camel@localhost.localdomain.suse.lists.linux.kernel>
[not found] ` <20021004051932.A13743@openss7.org.suse.lists.linux.kernel>
2002-10-04 13:01 ` Andi Kleen
2002-10-04 13:11 ` Brian F. G. Bidulock
2002-10-04 13:15 ` Andi Kleen
2002-10-04 13:22 ` Brian F. G. Bidulock
2002-10-04 14:11 ` Andi Kleen
2002-10-04 14:31 ` Brian F. G. Bidulock
[not found] ` <20021003221525.GA2221@kroah.com.suse.lists.linux.kernel>
[not found] ` <20021003222716.GB14919@suse.de.suse.lists.linux.kernel>
[not found] ` <1033684027.1247.43.camel@phantasy.suse.lists.linux.kernel>
[not found] ` <20021003233504.GA20570@suse.de.suse.lists.linux.kernel>
[not found] ` <20021003235022.GA82187@compsoc.man.ac.uk.suse.lists.linux.kernel>
[not found] ` <mailman.1033691043.6446.linux-kernel2news@redhat.com.suse.lists.linux.kernel>
[not found] ` <200210040403.g9443Vu03329@devserv.devel.redhat.com.suse.lists.linux.kernel>
[not found] ` <20021003233221.C31444@openss7.org.suse.lists.linux.kernel>
[not found] ` <20021004133657.B17216@devserv.devel.redhat.com.suse.lists.linux.kernel>
2002-10-04 18:14 ` Andi Kleen
2002-10-04 18:46 ` Alan Cox
2002-10-04 18:45 ` Alexander Viro
2002-10-04 19:15 ` Brian F. G. Bidulock
2002-10-04 19:26 ` Andi Kleen
2002-10-04 19:37 ` Pete Zaitcev
2002-10-04 19:43 ` Robert Love
2002-10-04 22:21 ` David S. Miller
2002-10-04 22:41 ` Brian F. G. Bidulock
2002-10-04 22:38 ` David S. Miller
-- strict thread matches above, loose matches on Subject: below --
2002-10-04 21:54 Mark Veltzer
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