From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20070427140517.205443955@de.ibm.com> References: <20070427140503.087958775@de.ibm.com> Date: Fri, 27 Apr 2007 16:05:26 +0200 From: Martin Schwidefsky Subject: [patch 23/38] Improved kernel stack overflow checking. Content-Disposition: inline; filename=126-stack-overflow.diff Sender: linux-kernel-owner@vger.kernel.org List-Archive: List-Post: To: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Cc: Martin Schwidefsky , Heiko Carstens List-ID: From: Martin Schwidefsky Recent cvs versions of gcc have support for an improved stack overflow checking that calculates the size of the guard size for each function. If the compiler accepts -mstack-size without -mstack-guard then the new stack check is available. We always want to use the new stack checker. Signed-off-by: Martin Schwidefsky Signed-off-by: Heiko Carstens --- arch/s390/Makefile | 2 ++ 1 files changed, 2 insertions(+) Index: quilt-2.6/arch/s390/Makefile =================================================================== --- quilt-2.6.orig/arch/s390/Makefile 2007-04-27 16:01:49.000000000 +0200 +++ quilt-2.6/arch/s390/Makefile 2007-04-27 16:04:58.000000000 +0200 @@ -67,8 +67,10 @@ ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y) cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE) +ifneq ($(call cc-option-yn,-mstack-size=8192),y) cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) endif +endif ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) cflags-$(CONFIG_WARN_STACK) += -mwarn-dynamicstack -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.