From owner-freebsd-hackers@FreeBSD.ORG  Wed Sep 17 18:30:17 2008
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 1F7641065670
	for <freebsd-hackers@freebsd.org>; Wed, 17 Sep 2008 18:30:17 +0000 (UTC)
	(envelope-from julian@elischer.org)
Received: from outH.internet-mail-service.net (outh.internet-mail-service.net
	[216.240.47.231])
	by mx1.freebsd.org (Postfix) with ESMTP id 081778FC1D
	for <freebsd-hackers@freebsd.org>; Wed, 17 Sep 2008 18:30:16 +0000 (UTC)
	(envelope-from julian@elischer.org)
Received: from idiom.com (mx0.idiom.com [216.240.32.160])
	by out.internet-mail-service.net (Postfix) with ESMTP id 96B162478;
	Wed, 17 Sep 2008 11:30:19 -0700 (PDT)
Received: from julian-mac.elischer.org (localhost [127.0.0.1])
	by idiom.com (Postfix) with ESMTP id A41B02D6013;
	Wed, 17 Sep 2008 11:30:16 -0700 (PDT)
Message-ID: <48D14CB8.5080002@elischer.org>
Date: Wed, 17 Sep 2008 11:30:16 -0700
From: Julian Elischer <julian@elischer.org>
User-Agent: Thunderbird 2.0.0.16 (Macintosh/20080707)
MIME-Version: 1.0
To: "Andrew N. Below" <defan@zenon.net>
References: <046601c918cc$786cc8c0$970da8c0@jam.zenon.net>	<48D123DD.2030701@elischer.org>
	<064901c918e2$803df770$970da8c0@jam.zenon.net>
In-Reply-To: <064901c918e2$803df770$970da8c0@jam.zenon.net>
Content-Type: text/plain; charset=KOI8-R; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-hackers@freebsd.org
Subject: Re: amd64, COMPAT_IA32 & syscall diverts
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 17 Sep 2008 18:30:17 -0000

Andrew N. Below wrote:
>> Andrew N. Below wrote:
>>> Hi all.
>>>
>>> We have loadable kernel module with
>>> several syscall intercepting functions
>>> (e.g., sysent[SYS___sysctl].sy_call).
>>> Earlier, this module was built and used
>>> on i386 platform, now we have to run it
>>> on amd64. For some reasons we have to
>>> enable COMPAT_IA32 option in kernel.
>>>
>>> Our syscall wrapper sucessfully receiving
>>> syscalls from amd64 binaries, but we have
>>> nothing from old i386 binaries.
>>>
>>> Seems like these calls are made bypassing
>>> our kernel module.
>> x86 binaries use a separate syscall table, so you need to patch
>> both tables.
> 
> Where can I find something about that table?

the compat stuff is in /sys/compat/ia32/
So I would start there and follow the logic.

> 
> Nothing interesting in sysent.h/syscall.h...
> 
> --
> Andrew
> _______________________________________________
> freebsd-hackers@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers
> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"