From: Jerry Cooperstein <coop@axian.com>
To: linux-kernel@vger.kernel.org, Yoav Weiss <ml-lkml@unpatched.org>
Subject: Re: The disappearing sys_call_table export.
Date: Tue, 6 May 2003 10:01:23 -0700 [thread overview]
Message-ID: <20030506170123.GA2025@p3.attbi.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0305061133290.2977-100000@marcellos.corky.net>
It's much simpler than that: Do either
nm vmlinux | grep sys_call_table
or
grep sys_call_table System.map
extract the address, use the header file to get the syscall number and
the offset.
Of course this all breaks the GPL, but you can get any non-exported
symbol address that way.
======================================================================
Jerry Cooperstein, Senior Consultant, <coop@axian.com>
Axian, Inc., Software Consulting and Training
4800 SW Griffith Dr., Ste. 202, Beaverton, OR 97005 USA
http://www.axian.com/
======================================================================
On Tue, May 06, 2003 at 11:45:41AM +0300, Yoav Weiss wrote:
> > But how? When some global will not be exported, it would not be listed
> > in /proc/ksyms.
>
> So what ?
> You just find the right address (in this case by getting the addresses of
> exported syscalls and finding a list in memory, containing them in the
> right order), and cast it to be the syscall table. If you want it to work
> with a binary-only driver, you can even insmod a small module that does
> that and adds the result to the symbol table for other modules to use.
>
> We've been doing that for years on closed-source systems like AIX. The
> above is just one way to locate a struct in memory. A faster way is to
> find some exported structs which are known to point to the unexported
> symbol from some offset, extract the symbol's address, and "re-export" it.
>
> In fact, in linux which is opensource, you can probably write a script
> that extracts any unexported symbol from the source code, find a path to
> it from some exported symbol, and automagically create a module that
> re-exports this symbol for your legacy driver to use.
>
> If you write the script, don't forget to GPL it :)
>
> Yoav Weiss
>
> -
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next prev parent reply other threads:[~2003-05-06 16:49 UTC|newest]
Thread overview: 207+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-06 8:45 The disappearing sys_call_table export Yoav Weiss
2003-05-06 9:15 ` David S. Miller
2003-05-06 19:45 ` David Schwartz
2003-05-06 10:06 ` Dmitry A. Fedorov
2003-05-06 17:01 ` Jerry Cooperstein [this message]
2003-05-06 17:45 ` Yoav Weiss
-- strict thread matches above, loose matches on Subject: below --
2003-05-16 16:15 Chuck Ebbert
2003-05-15 8:16 Chuck Ebbert
2003-05-14 23:24 Chuck Ebbert
2003-05-15 0:49 ` David Schwartz
2003-05-14 8:41 Chuck Ebbert
2003-05-13 14:45 Chuck Ebbert
2003-05-13 19:00 ` jjs
2003-05-13 21:44 ` Jesse Pollard
2003-05-13 14:45 Chuck Ebbert
2003-05-13 21:32 ` Jesse Pollard
2003-05-13 13:58 Yoav Weiss
2003-05-13 22:51 ` Ahmed Masud
2003-05-13 23:58 ` Yoav Weiss
2003-06-12 23:20 ` Nigel Cunningham
2003-06-15 22:37 ` Yoav Weiss
2003-05-13 9:52 Chuck Ebbert
2003-05-13 13:32 ` Yoav Weiss
2003-05-14 7:44 ` Mike Touloumtzis
2003-05-14 10:34 ` Ahmed Masud
2003-05-14 20:58 ` Mike Touloumtzis
2003-05-14 21:32 ` Richard B. Johnson
2003-05-14 21:37 ` Yoav Weiss
2003-05-14 21:51 ` Richard B. Johnson
2003-05-15 13:17 ` Jesse Pollard
2003-05-15 15:16 ` Chris Ricker
2003-05-15 15:31 ` Richard B. Johnson
2003-05-15 15:33 ` Chris Ricker
2003-05-15 15:46 ` Richard B. Johnson
2003-05-15 16:21 ` Ahmed Masud
2003-05-15 2:06 ` Ahmed Masud
2003-05-13 1:57 Chuck Ebbert
2003-05-13 12:24 ` Jesse Pollard
2003-05-13 1:57 Chuck Ebbert
2003-05-13 2:25 ` Yoav Weiss
2003-05-12 22:57 Yoav Weiss
2003-05-12 23:58 ` Bryan Andersen
2003-05-13 12:11 ` Jesse Pollard
2003-05-13 13:44 ` Yoav Weiss
2003-05-13 21:26 ` Jesse Pollard
2003-05-13 22:21 ` Yoav Weiss
2003-05-14 13:05 ` Jesse Pollard
2003-05-12 21:51 Chuck Ebbert
2003-05-12 21:05 ` Alan Cox
2003-05-12 22:12 ` Valdis.Kletnieks
2003-05-12 21:19 ` Alan Cox
2003-05-12 22:29 ` Valdis.Kletnieks
2003-05-13 12:31 ` Ahmed Masud
[not found] <20030512164017$6c09@gated-at.bofh.it>
2003-05-12 17:02 ` Pascal Schmidt
2003-05-12 16:32 Chuck Ebbert
2003-05-12 16:46 ` Alan Cox
[not found] <20030511164010$5d34@gated-at.bofh.it>
2003-05-12 0:47 ` Ben Pfaff
2003-05-11 20:39 Chuck Ebbert
2003-05-11 22:32 ` Yoav Weiss
2003-05-11 21:46 ` Alan Cox
2003-05-11 22:57 ` David Schwartz
2003-05-14 21:08 ` H. Peter Anvin
2003-05-11 23:22 ` Yoav Weiss
2003-05-11 22:32 ` Ahmed Masud
2003-05-11 16:32 Chuck Ebbert
2003-05-11 17:20 ` David Wagner
2003-05-11 17:53 ` Yoav Weiss
2003-05-10 21:45 Yoav Weiss
2003-05-10 19:32 Chuck Ebbert
2003-05-10 19:18 Yoav Weiss
2003-05-10 19:53 ` Muli Ben-Yehuda
2003-05-10 20:06 ` Yoav Weiss
2003-05-11 3:54 ` Ahmed Masud
2003-05-10 20:48 ` David Wagner
2003-05-09 21:22 Chuck Ebbert
2003-05-09 17:07 Chuck Ebbert
2003-05-09 18:27 ` Richard B. Johnson
2003-05-09 19:02 ` Valdis.Kletnieks
2003-05-09 19:18 ` Richard B. Johnson
2003-05-09 19:25 ` Valdis.Kletnieks
2003-05-09 17:07 Chuck Ebbert
2003-05-09 12:41 Chuck Ebbert
2003-05-09 12:47 ` Christoph Hellwig
2003-05-09 11:09 Chuck Ebbert
2003-05-09 9:43 Chuck Ebbert
2003-05-09 9:11 Chuck Ebbert
2003-05-09 10:47 ` Christoph Hellwig
2003-05-09 7:50 Chuck Ebbert
2003-05-09 7:57 ` Christoph Hellwig
2003-05-09 7:50 Chuck Ebbert
2003-05-09 7:59 ` Christoph Hellwig
2003-05-09 12:18 ` Alan Cox
2003-05-09 17:07 ` Valdis.Kletnieks
2003-05-10 15:34 ` Alan Cox
2003-05-08 19:43 Chuck Ebbert
2003-05-08 19:43 Chuck Ebbert
2003-05-08 19:58 ` Christoph Hellwig
2003-05-09 13:53 ` Jesse Pollard
2003-05-09 14:37 ` Ragnar =?unknown-8bit?Q?Kj=F8rstad?=
2003-05-12 14:19 ` Jesse Pollard
2003-05-12 15:56 ` Christoph Hellwig
2003-05-08 19:43 Chuck Ebbert
2003-05-08 19:48 ` Christoph Hellwig
2003-05-08 21:44 ` Alan Cox
2003-05-08 14:08 Chuck Ebbert
2003-05-08 14:36 ` Christoph Hellwig
2003-05-08 14:42 ` Alan Cox
2003-05-08 14:56 ` Jesse Pollard
2003-05-08 15:22 ` Alan Cox
2003-05-08 17:02 ` William Stearns
2003-05-08 18:28 ` Jesse Pollard
2003-05-10 14:38 ` Ahmed Masud
2003-05-10 16:50 ` Arjan van de Ven
2003-05-10 17:51 ` Ahmed Masud
2003-05-10 17:56 ` Arjan van de Ven
2003-05-10 18:03 ` Ahmed Masud
2003-05-10 18:09 ` Ahmed Masud
2003-05-10 18:43 ` Werner Almesberger
2003-05-10 18:26 ` Werner Almesberger
2003-05-11 11:01 ` Terje Malmedal
2003-05-11 11:57 ` Ahmed Masud
2003-05-07 19:04 Chuck Ebbert
2003-05-08 9:58 ` Terje Eggestad
2003-05-08 9:59 ` Arjan van de Ven
2003-05-08 10:20 ` viro
2003-05-08 12:54 ` Terje Eggestad
2003-05-08 12:58 ` Christoph Hellwig
2003-05-08 19:10 ` Shachar Shemesh
2003-05-08 19:15 ` Christoph Hellwig
2003-05-08 21:48 ` J.A. Magallon
2003-05-09 7:43 ` Muli Ben-Yehuda
2003-05-09 7:42 ` Muli Ben-Yehuda
2003-05-09 8:08 ` Greg KH
2003-05-09 19:07 ` Muli Ben-Yehuda
2003-05-07 15:34 petter wahlman
2003-05-07 15:48 ` Arjan van de Ven
2003-05-07 16:00 ` Richard B. Johnson
2003-05-07 16:08 ` petter wahlman
2003-05-07 16:45 ` Richard B. Johnson
2003-05-07 16:59 ` Richard B. Johnson
2003-05-07 18:07 ` petter wahlman
2003-05-07 18:33 ` Richard B. Johnson
2003-05-08 8:58 ` petter wahlman
2003-05-08 15:11 ` Richard B. Johnson
2003-05-07 21:27 ` Jesse Pollard
2003-05-07 17:21 ` Jesse Pollard
2003-05-07 16:18 ` Steffen Persvold
2003-05-08 12:23 ` Eric W. Biederman
2003-05-06 20:48 Chuck Ebbert
2003-05-06 15:51 Yoav Weiss
2003-05-05 21:29 Chuck Ebbert
2003-05-05 22:49 ` Terje Eggestad
2003-05-06 2:23 ` Dmitry A. Fedorov
2003-05-06 7:27 ` Terje Eggestad
2003-05-06 8:21 ` Dmitry A. Fedorov
[not found] <mailman.1052142720.4060.linux-kernel2news@redhat.com>
2003-05-05 20:50 ` Pete Zaitcev
2003-05-06 2:17 ` Dmitry A. Fedorov
2003-05-05 13:30 Dmitry A. Fedorov
2003-05-05 13:42 ` Christoph Hellwig
2003-05-05 14:46 ` Dmitry A. Fedorov
2003-05-05 13:45 ` viro
2003-05-05 14:29 ` Dmitry A. Fedorov
2003-05-05 8:19 Terje Eggestad
2003-05-05 8:23 ` Christoph Hellwig
2003-05-05 9:33 ` Terje Eggestad
2003-05-05 9:38 ` Arjan van de Ven
2003-05-05 10:12 ` Terje Eggestad
2003-05-05 10:25 ` Christoph Hellwig
2003-05-05 11:23 ` Terje Eggestad
2003-05-05 11:27 ` Arjan van de Ven
2003-05-05 11:31 ` Terje Eggestad
2003-05-05 11:33 ` Arjan van de Ven
2003-05-05 15:53 ` Tigran Aivazian
2003-05-05 14:57 ` Christoph Hellwig
2003-05-05 14:59 ` Arjan van de Ven
2003-05-05 12:52 ` Christoph Hellwig
2003-05-05 13:41 ` Terje Eggestad
2003-05-05 13:43 ` Christoph Hellwig
2003-05-05 13:50 ` Terje Eggestad
2003-05-05 13:54 ` Arjan van de Ven
2003-05-05 13:55 ` Christoph Hellwig
2003-05-05 14:28 ` Carl-Daniel Hailfinger
2003-05-05 14:34 ` Christoph Hellwig
2003-05-05 15:25 ` Carl-Daniel Hailfinger
2003-05-06 7:30 ` Eric W. Biederman
2003-05-06 8:14 ` Terje Eggestad
2003-05-06 9:21 ` Eric W. Biederman
2003-05-06 11:21 ` Terje Eggestad
2003-05-06 11:37 ` Eric W. Biederman
2003-05-06 12:08 ` Terje Eggestad
2003-05-05 11:16 ` Alan Cox
2003-05-05 13:23 ` Terje Eggestad
2003-05-08 12:25 ` Terje Malmedal
2003-05-08 12:29 ` Christoph Hellwig
2003-05-08 13:18 ` Terje Malmedal
2003-05-08 14:25 ` Christoph Hellwig
2003-05-08 15:29 ` Terje Malmedal
2003-05-08 18:13 ` Jesse Pollard
2003-05-08 19:17 ` Christoph Hellwig
2003-05-09 9:18 ` Terje Malmedal
2003-05-08 14:58 ` Alan Cox
2003-05-09 8:56 ` Terje Malmedal
2003-05-07 2:14 ` Ben Lau
2003-05-05 8:27 ` Arjan van de Ven
2003-05-05 9:01 ` Dmitry A. Fedorov
2003-05-05 9:19 ` Christoph Hellwig
2003-05-05 9:32 ` Arjan van de Ven
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