Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752595Ab2JZAF2 (ORCPT ); Thu, 25 Oct 2012 20:05:28 -0400 Received: from mail.kernel.org ([198.145.19.201]:52259 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752436Ab2JZAFZ (ORCPT ); Thu, 25 Oct 2012 20:05:25 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , alan@lxorguk.ukuu.org.uk, Chris Metcalf Subject: [ 01/31] arch/tile: avoid generating .eh_frame information in modules Date: Thu, 25 Oct 2012 17:04:08 -0700 Message-Id: <20121026000215.094713375@linuxfoundation.org> X-Mailer: git-send-email 1.7.12.2.421.g261b511 In-Reply-To: <20121026000214.941721299@linuxfoundation.org> References: <20121026000214.941721299@linuxfoundation.org> User-Agent: quilt/0.60-2.1.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1524 Lines: 43 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chris Metcalf commit 627072b06c362bbe7dc256f618aaa63351f0cfe6 upstream. The tile tool chain uses the .eh_frame information for backtracing. The vmlinux build drops any .eh_frame sections at link time, but when present in kernel modules, it causes a module load failure due to the presence of unsupported pc-relative relocations. When compiling to use compiler feedback support, the compiler by default omits .eh_frame information, so we don't see this problem. But when not using feedback, we need to explicitly suppress the .eh_frame. Signed-off-by: Chris Metcalf Signed-off-by: Greg Kroah-Hartman --- arch/tile/Makefile | 4 ++++ 1 file changed, 4 insertions(+) --- a/arch/tile/Makefile +++ b/arch/tile/Makefile @@ -26,6 +26,10 @@ $(error Set TILERA_ROOT or CROSS_COMPILE endif endif +# The tile compiler may emit .eh_frame information for backtracing. +# In kernel modules, this causes load failures due to unsupported relocations. +KBUILD_CFLAGS += -fno-asynchronous-unwind-tables + ifneq ($(CONFIG_DEBUG_EXTRA_FLAGS),"") KBUILD_CFLAGS += $(CONFIG_DEBUG_EXTRA_FLAGS) endif -- 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/