From: Muli Ben-Yehuda <mulix@mulix.org>
To: Sergiy Lozovsky <serge_lozovsky@yahoo.com>
Cc: Andi Kleen <ak@muc.de>, linux-kernel@vger.kernel.org
Subject: Re: kernel stack challenge
Date: Sun, 4 Apr 2004 20:38:25 +0200 [thread overview]
Message-ID: <20040404183825.GA18536@mulix.org> (raw)
In-Reply-To: <20040404182438.79937.qmail@web40504.mail.yahoo.com>
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On Sun, Apr 04, 2004 at 11:24:38AM -0700, Sergiy Lozovsky wrote:
> I wonder how it is possible to access task struct
> having current stack pointer. %esp points at the
> middle of the stack (when we are in the kernel) when
> interrupt occures.
Look at the curren()t and get_current() macros. Basically, the stack
is page aligned, so with the proper masking of %esp you can get to the
bottom of the stack.
See http://www.kernelnewbies.org/faq/, "how does get_current work?".
Cheers,
Muli
--
Muli Ben-Yehuda
http://www.mulix.org | http://mulix.livejournal.com/
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next prev parent reply other threads:[~2004-04-04 18:45 UTC|newest]
Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1H9LV-5Jb-1@gated-at.bofh.it>
2004-04-04 11:27 ` kernel stack challenge Andi Kleen
2004-04-04 18:24 ` Sergiy Lozovsky
2004-04-04 18:38 ` Muli Ben-Yehuda [this message]
[not found] <20040409182517.330.qmail@web40508.mail.yahoo.com>
2004-04-10 4:17 ` Horst von Brand
[not found] <58907794@toto.iv>
2004-04-07 4:29 ` Peter Chubb
[not found] <24DA9B48-8827-11D8-87A5-000A9585C204@able.es>
2004-04-07 0:27 ` Sergiy Lozovsky
[not found] <200404061618.i36GIHgW003419@eeyore.valparaiso.cl>
2004-04-06 18:16 ` Sergiy Lozovsky
2004-04-06 20:01 ` Valdis.Kletnieks
2004-04-06 21:38 ` Sergiy Lozovsky
2004-04-06 22:46 ` Timothy Miller
[not found] <200404061606.i36G6YLE003375@eeyore.valparaiso.cl>
2004-04-06 18:04 ` Sergiy Lozovsky
2004-04-06 18:28 ` John Stoffel
2004-04-06 18:48 ` Sergiy Lozovsky
2004-04-06 18:57 ` Richard B. Johnson
2004-04-06 21:15 ` Sergiy Lozovsky
2004-04-06 22:44 ` Timothy Miller
2004-04-06 22:57 ` viro
2004-04-06 23:32 ` Sergiy Lozovsky
2004-04-06 23:45 ` Robin Rosenberg
2004-04-07 2:25 ` Horst von Brand
[not found] <200404052026.i35KQh5g004342@eeyore.valparaiso.cl>
2004-04-05 21:21 ` Sergiy Lozovsky
2004-04-06 20:01 ` Horst von Brand
[not found] <200404052043.i35KhDvS020176@turing-police.cc.vt.edu>
2004-04-05 21:06 ` Sergiy Lozovsky
2004-04-04 6:48 Sergiy Lozovsky
2004-04-05 9:39 ` Helge Hafting
2004-04-05 17:05 ` Sergiy Lozovsky
2004-04-05 18:06 ` Timothy Miller
2004-04-05 17:59 ` Sergiy Lozovsky
2004-04-05 19:27 ` Valdis.Kletnieks
2004-04-05 21:14 ` Timothy Miller
2004-04-05 20:09 ` John Stoffel
2004-04-05 20:54 ` Sergiy Lozovsky
2004-04-05 21:08 ` Chris Wright
2004-04-05 21:40 ` Sergiy Lozovsky
2004-04-05 21:53 ` Chris Wright
2004-04-05 22:22 ` Timothy Miller
2004-04-05 23:49 ` Sergiy Lozovsky
2004-04-06 13:25 ` Jesse Pollard
[not found] ` <20040406132750$3d4e@grapevine.lcs.mit.edu>
[not found] ` <mit.lcs.mail.linux-kernel/20040406132750$3d4e@grapevine.lcs.mit.edu>
2004-04-06 16:40 ` Patrick J. LoPresti
2004-04-06 19:10 ` Timothy Miller
2004-04-06 20:53 ` Patrick J. LoPresti
2004-04-06 21:24 ` Timothy Miller
2004-04-07 14:36 ` Jesse Pollard
2004-04-05 21:28 ` Timothy Miller
2004-04-05 21:21 ` Stephen Smoogen
2004-04-05 22:25 ` Timothy Miller
2004-04-05 21:30 ` Sergiy Lozovsky
2004-04-05 21:45 ` Kevin Fox
2004-04-05 21:59 ` Robin Rosenberg
2004-04-05 22:52 ` Sergiy Lozovsky
2004-04-06 0:46 ` Robin Rosenberg
2004-04-06 0:55 ` Robin Rosenberg
2004-04-06 3:02 ` Sergiy Lozovsky
2004-04-06 3:04 ` Randy.Dunlap
2004-04-05 22:20 ` Timothy Miller
2004-04-05 23:27 ` Sergiy Lozovsky
2004-04-06 20:16 ` Horst von Brand
2004-04-06 20:58 ` Timothy Miller
2004-04-06 22:05 ` Sergiy Lozovsky
2004-04-06 22:56 ` Timothy Miller
2004-04-06 23:17 ` Sergiy Lozovsky
2004-04-08 13:11 ` Martin Waitz
2004-04-08 22:33 ` Sergiy Lozovsky
2004-04-07 2:44 ` Horst von Brand
2004-04-07 17:54 ` Sergiy Lozovsky
2004-04-08 2:43 ` Horst von Brand
2004-04-08 4:07 ` Sergiy Lozovsky
2004-04-08 4:29 ` Horst von Brand
2004-04-08 22:51 ` Sergiy Lozovsky
2004-04-08 15:44 ` Valdis.Kletnieks
2004-04-08 22:22 ` Sergiy Lozovsky
2004-04-09 15:27 ` Jesse Pollard
2004-04-05 21:12 ` Timothy Miller
2004-04-06 13:32 ` Helge Hafting
2004-04-06 17:44 ` Sergiy Lozovsky
2004-04-07 1:02 ` Horst von Brand
2004-04-07 1:34 ` Sergiy Lozovsky
2004-04-07 8:57 ` David Weinehall
2004-04-07 13:38 ` Chris Friesen
2004-04-07 17:12 ` Sergiy Lozovsky
2004-04-07 17:16 ` Sergiy Lozovsky
2004-04-07 2:30 ` viro
2004-04-06 18:33 ` Jamie Lokier
2004-04-06 18:51 ` Sergiy Lozovsky
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