Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756585AbYAGMec (ORCPT ); Mon, 7 Jan 2008 07:34:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755072AbYAGMeX (ORCPT ); Mon, 7 Jan 2008 07:34:23 -0500 Received: from mga02.intel.com ([134.134.136.20]:32659 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754920AbYAGMeW (ORCPT ); Mon, 7 Jan 2008 07:34:22 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.24,253,1196668800"; d="scan'208";a="250511040" Date: Mon, 7 Jan 2008 13:33:46 +0100 From: Markus Metzger To: ak@suse.de, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@elte.hu, tglx@linutronix.de Cc: markus.t.metzger@intel.com, markus.t.metzger@gmail.com, suresh.b.siddha@intel.com, roland@redhat.com, akpm@linux-foundation.org, mtk.manpages@gmail.com Subject: [patch 1/2] x86, ptrace: add version and last remaining size to status command Message-ID: <20080107133346.A11643@sedona.ch.intel.com> Mime-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.2.5i Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2662 Lines: 67 Return the API version and the size of a bts_struct in the PTRACE_BTS_STATUS command. This might be handy in case other archs want to use and extend the interface. It allows users to program against one version and continue to work for newer versions (they have to discard everything they don't understand, of course). Signed-off-by: Markus Metzger --- Index: linux-2.6-x86/arch/x86/kernel/ptrace.c =================================================================== --- linux-2.6-x86.orig/arch/x86/kernel/ptrace.c 2008-01-07 12:42:39.%N +0100 +++ linux-2.6-x86/arch/x86/kernel/ptrace.c 2008-01-07 13:09:07.%N +0100 @@ -787,6 +787,9 @@ cfg.flags |= PTRACE_BTS_O_SCHED; } + cfg.bts_size = sizeof(struct bts_struct); + cfg.version = PTRACE_BTS_VERSION; + if (copy_to_user(ucfg, &cfg, sizeof(cfg))) return -EFAULT; Index: linux-2.6-x86/include/asm-x86/ptrace-abi.h =================================================================== --- linux-2.6-x86.orig/include/asm-x86/ptrace-abi.h 2008-01-07 12:42:39.%N +0100 +++ linux-2.6-x86/include/asm-x86/ptrace-abi.h 2008-01-07 13:08:39.%N +0100 @@ -91,6 +91,10 @@ unsigned int flags; /* buffer overflow signal */ unsigned int signal; + /* actual size of bts_struct in bytes */ + unsigned short bts_size; + /* interface version */ + unsigned short version; }; #endif Index: linux-2.6-x86/include/asm-x86/ptrace.h =================================================================== --- linux-2.6-x86.orig/include/asm-x86/ptrace.h 2008-01-07 12:42:39.%N +0100 +++ linux-2.6-x86/include/asm-x86/ptrace.h 2008-01-07 13:08:39.%N +0100 @@ -9,6 +9,8 @@ #ifdef __KERNEL__ +#define PTRACE_BTS_VERSION 1 + /* the DS BTS struct is used for ptrace as well */ #include --------------------------------------------------------------------- Intel GmbH Dornacher Strasse 1 85622 Feldkirchen/Muenchen Germany Sitz der Gesellschaft: Feldkirchen bei Muenchen Geschaeftsfuehrer: Douglas Lusk, Peter Gleissner, Hannes Schwaderer Registergericht: Muenchen HRB 47456 Ust.-IdNr. VAT Registration No.: DE129385895 Citibank Frankfurt (BLZ 502 109 00) 600119052 This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/