From patchwork Wed Oct 2 14:41:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincenzo Frascino X-Patchwork-Id: 11171221 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1C2C615AB for ; Wed, 2 Oct 2019 14:44:19 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E9EBF21783 for ; Wed, 2 Oct 2019 14:44:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="hw4viGap" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E9EBF21783 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=NGpEc3ee3BXQbZHTxBWVddn1rQ/p5ifg6usuYStXT5s=; b=hw4viGapuhs6Kq jl4o5d6SLgPVzecVQ/vZ3Tc6bmyWKynAzqA56UFA9rk9lVdUp9sZzBvTJtIb31t1vf1cLrEukqwAZ yr4xbsOaH6jITSNfXuK2TgBUnm8ssFjZSBBkUoH43dinApgHDO7BqHnRZJKE1Syh/ni5RIWciVxat WyZBlTo6clf06UM1LUfjEaLHEMwEcnVqpK2Ch88f4ME4wr31RaF2jbVQlyaF3R5rkJoi6DD+wZ5L/ ZotfFEYhXKjYLe42z5xRxPcd3GTFNPPlC3PeGazUCXDiW12QWpVzA1mcSEnLnj48F9nuq+SM2GJKA FT2VqYwWfgFp7mujOJlA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iFfrW-0004Hm-BN; Wed, 02 Oct 2019 14:44:18 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iFfpW-00036d-7H for linux-arm-kernel@lists.infradead.org; Wed, 02 Oct 2019 14:42:17 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5E8C41597; Wed, 2 Oct 2019 07:42:09 -0700 (PDT) Received: from e119884-lin.cambridge.arm.com (e119884-lin.cambridge.arm.com [10.1.196.72]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2615D3F706; Wed, 2 Oct 2019 07:42:08 -0700 (PDT) From: Vincenzo Frascino To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 1/6] arm64: vdso32: Fix syncconfig errors. Date: Wed, 2 Oct 2019 15:41:51 +0100 Message-Id: <20191002144156.2174-2-vincenzo.frascino@arm.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191002144156.2174-1-vincenzo.frascino@arm.com> References: <20191002144156.2174-1-vincenzo.frascino@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191002_074214_360894_892DE985 X-CRM114-Status: GOOD ( 13.42 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ard.biesheuvel@linaro.org, catalin.marinas@arm.com, ndesaulniers@google.com, luto@kernel.org, tglx@linutronix.de, vincenzo.frascino@arm.com, will@kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The .config file and the generated include/config/auto.conf can end up out of sync after a set of commands since CONFIG_CROSS_COMPILE_COMPAT_VDSO is not updated correctly. The sequence can be reproduced as follows: $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- defconfig [...] $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- menuconfig [set CONFIG_CROSS_COMPILE_COMPAT_VDSO="arm-linux-gnueabihf-"] $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- Which results in: arch/arm64/Makefile:62: CROSS_COMPILE_COMPAT not defined or empty, the compat vDSO will not be built even though the compat vDSO has been built: $ file arch/arm64/kernel/vdso32/vdso.so arch/arm64/kernel/vdso32/vdso.so: ELF 32-bit LSB pie executable, ARM, EABI5 version 1 (SYSV), dynamically linked, BuildID[sha1]=c67f6c786f2d2d6f86c71f708595594aa25247f6, stripped A similar case that involves changing the configuration parameter multiple times can be reconducted to the same family of problems. The reason behind it comes from the fact that the master Makefile includes that architecture Makefile twice, once before the syncconfig and one after. Since the synchronization of the files happens only upon syncconfig, the architecture Makefile included before this event does not see the change in configuration. As a consequence of this it is not possible to handle the cross compiler definitions inside the architecture Makefile. Address the problem refactoring the arm64 main Makefile and removing the misleading warnings. As a consequence of this it is not possible anymore to set the compat cross compiler from menuconfig but it requires to be exported via command line. E.g.: $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- Cc: Will Deacon Cc: Catalin Marinas Reported-by: Will Deacon Signed-off-by: Vincenzo Frascino Reviewed-by: Catalin Marinas Tested-by: Catalin Marinas --- arch/arm64/Makefile | 18 +++++------------- arch/arm64/kernel/vdso32/Makefile | 2 -- 2 files changed, 5 insertions(+), 15 deletions(-) diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index 84a3d502c5a5..dfa6a5cb99e4 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -53,20 +53,12 @@ $(warning Detected assembler with broken .inst; disassembly will be unreliable) endif endif +COMPATCC ?= $(CROSS_COMPILE_COMPAT)gcc +export COMPATCC + ifeq ($(CONFIG_GENERIC_COMPAT_VDSO), y) - CROSS_COMPILE_COMPAT ?= $(CONFIG_CROSS_COMPILE_COMPAT_VDSO:"%"=%) - - ifeq ($(CONFIG_CC_IS_CLANG), y) - $(warning CROSS_COMPILE_COMPAT is clang, the compat vDSO will not be built) - else ifeq ($(strip $(CROSS_COMPILE_COMPAT)),) - $(warning CROSS_COMPILE_COMPAT not defined or empty, the compat vDSO will not be built) - else ifeq ($(shell which $(CROSS_COMPILE_COMPAT)gcc 2> /dev/null),) - $(error $(CROSS_COMPILE_COMPAT)gcc not found, check CROSS_COMPILE_COMPAT) - else - export CROSS_COMPILE_COMPAT - export CONFIG_COMPAT_VDSO := y - compat_vdso := -DCONFIG_COMPAT_VDSO=1 - endif + export CONFIG_COMPAT_VDSO := y + compat_vdso := -DCONFIG_COMPAT_VDSO=1 endif KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst) \ diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile index 1fba0776ed40..19e0d3115ffe 100644 --- a/arch/arm64/kernel/vdso32/Makefile +++ b/arch/arm64/kernel/vdso32/Makefile @@ -8,8 +8,6 @@ ARCH_REL_TYPE_ABS := R_ARM_JUMP_SLOT|R_ARM_GLOB_DAT|R_ARM_ABS32 include $(srctree)/lib/vdso/Makefile -COMPATCC := $(CROSS_COMPILE_COMPAT)gcc - # Same as cc-*option, but using COMPATCC instead of CC cc32-option = $(call try-run,\ $(COMPATCC) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))