From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1767117AbXDEP4i (ORCPT ); Thu, 5 Apr 2007 11:56:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1767120AbXDEP4h (ORCPT ); Thu, 5 Apr 2007 11:56:37 -0400 Received: from gw.goop.org ([64.81.55.164]:50361 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1767117AbXDEP4h (ORCPT ); Thu, 5 Apr 2007 11:56:37 -0400 Message-Id: <20070405155323.759992347@goop.org> User-Agent: quilt/0.46-1 Date: Thu, 05 Apr 2007 08:53:23 -0700 From: Jeremy Fitzhardinge To: Andi Kleen Cc: Andrew Morton , virtualization@lists.osdl.org, lkml , Zachary Amsden , "Jan Beulich" , "Eric W. Biederman" , Ingo Molnar , Roland McGrath Subject: [patch 0/2] Updates to compat VDSOs Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi Andi, Here's a couple of patches to fix up COMPAT_VDSO: The first is a straightforward implementation of Jan's original idea of relocating the VDSO to match its mapped location. Unlike Jan and Zach's version, I changed it to relocate based on the phdrs rather than the sections; the result is pleasantly compact. The second patch takes advantage of the fact that all the COMPAT_VDSO work happens at runtime now, and allows compat mode to be enabled dynamically. If you specify vdso=2 on the kernel command line, it comes up in compat mode; vdso=1 is normal vdso mode, and vdso=0 disables vdso altogether. You can also switch modes with sysctl. Changes since last posting: - rebase sections as well as phdrs - relocate symbols - more robust DT_tag handling - handle dynamic compat mode switches a bit better Thanks to Jan and Roland for the review. Thanks, J --