From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752749AbcAUWyX (ORCPT ); Thu, 21 Jan 2016 17:54:23 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60142 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751497AbcAUWvd (ORCPT ); Thu, 21 Jan 2016 17:51:33 -0500 From: Josh Poimboeuf To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org Cc: linux-kernel@vger.kernel.org, live-patching@vger.kernel.org, Michal Marek , Peter Zijlstra , Andy Lutomirski , Borislav Petkov , Linus Torvalds , Andi Kleen , Pedro Alves , Namhyung Kim , Bernd Petrovitsch , Chris J Arges , Andrew Morton , Jiri Slaby , Arnaldo Carvalho de Melo , Wim Van Sebroeck , Guenter Roeck , linux-watchdog@vger.kernel.org Subject: [PATCH 27/33] watchdog/hpwdt: Create stack frame in asminline_call() Date: Thu, 21 Jan 2016 16:49:31 -0600 Message-Id: <60de3cfb6f16d413bfb923036cc87fec132df735.1453405861.git.jpoimboe@redhat.com> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org asminline_call() is a callable non-leaf function which doesn't honor CONFIG_FRAME_POINTER, which can result in bad stack traces. Create a stack frame when CONFIG_FRAME_POINTER is enabled. Signed-off-by: Josh Poimboeuf Cc: Wim Van Sebroeck Cc: Guenter Roeck Cc: linux-watchdog@vger.kernel.org --- drivers/watchdog/hpwdt.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c index 286369d..f368383 100644 --- a/drivers/watchdog/hpwdt.c +++ b/drivers/watchdog/hpwdt.c @@ -353,10 +353,10 @@ static int detect_cru_service(void) asm(".text \n\t" ".align 4 \n\t" - ".globl asminline_call \n" + ".globl asminline_call \n\t" + ".type asminline_call, @function \n\t" "asminline_call: \n\t" - "pushq %rbp \n\t" - "movq %rsp, %rbp \n\t" + FRAME_BEGIN "pushq %rax \n\t" "pushq %rbx \n\t" "pushq %rdx \n\t" @@ -386,7 +386,7 @@ asm(".text \n\t" "popq %rdx \n\t" "popq %rbx \n\t" "popq %rax \n\t" - "leave \n\t" + FRAME_END "ret \n\t" ".previous"); -- 2.4.3