From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934393AbXGQRxG (ORCPT ); Tue, 17 Jul 2007 13:53:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756701AbXGQRwz (ORCPT ); Tue, 17 Jul 2007 13:52:55 -0400 Received: from gw.goop.org ([64.81.55.164]:57333 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753935AbXGQRwy (ORCPT ); Tue, 17 Jul 2007 13:52:54 -0400 Message-ID: <469D01BE.7070204@goop.org> Date: Tue, 17 Jul 2007 10:51:58 -0700 From: Jeremy Fitzhardinge User-Agent: Thunderbird 2.0.0.4 (X11/20070615) MIME-Version: 1.0 To: Andi Kleen CC: john.blackwood@ccur.com, linux-kernel@vger.kernel.org, Jeremy Fitzhardinge , Roland McGrath , bugsy@ccur.com, Andrew Morton , Jan Beulich Subject: Re: [PATCH] Reading the VDSO area - i386 References: <469CECFE.6060408@ccur.com> <469CF2BC.3000306@goop.org> <200707171948.42054.ak@suse.de> In-Reply-To: <200707171948.42054.ak@suse.de> X-Enigmail-Version: 0.95.2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andi Kleen wrote: > On Tuesday 17 July 2007 18:47:56 Jeremy Fitzhardinge wrote: > >> John Blackwood wrote: >> >>> I was doing some tests that attempt to read the VDSO area of a >>> task through either the /proc/pid/mem or ptrace(PTRACE_PEEKTEXT, >>> ...) interfaces, and it seems that when the CONFIG_COMPAT_VDSO kernel >>> parameter is enabled, we can no longer successfully read the VDSO area >>> on i386 kernels. >>> >> Thanks. Someone else noticed this recently, and posted a near-identical >> patch. But I can't seem to find it right now... >> >> Andrew, Andi: do you remember something like this passing by? >> > > Yes it was from Jan Beulich. > Ah, yes. For some reason I can't find it in my archives. Do you have it queued up? J