From patchwork Tue May 18 10:12:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Alexandre Ghiti X-Patchwork-Id: 1480178 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4FksSb68Fnz9sRK for ; Tue, 18 May 2021 20:19:59 +1000 (AEST) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4FksSb5khHz306b for ; Tue, 18 May 2021 20:19:59 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=ghiti.fr (client-ip=217.70.178.240; helo=mslow1.mail.gandi.net; envelope-from=alex@ghiti.fr; receiver=) Received: from mslow1.mail.gandi.net (mslow1.mail.gandi.net [217.70.178.240]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4FksSD6pp3z309M for ; Tue, 18 May 2021 20:19:40 +1000 (AEST) Received: from relay10.mail.gandi.net (unknown [217.70.178.230]) by mslow1.mail.gandi.net (Postfix) with ESMTP id ABBD7E00B8 for ; Tue, 18 May 2021 10:15:40 +0000 (UTC) Received: (Authenticated sender: alex@ghiti.fr) by relay10.mail.gandi.net (Postfix) with ESMTPSA id 2B23C24000D; Tue, 18 May 2021 10:15:09 +0000 (UTC) From: Alexandre Ghiti To: Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Paul Walmsley , Palmer Dabbelt , Albert Ou , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: [PATCH v6 2/3] powerpc: Move script to check relocations at compile time in scripts/ Date: Tue, 18 May 2021 12:12:51 +0200 Message-Id: <20210518101252.1484465-3-alex@ghiti.fr> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210518101252.1484465-1-alex@ghiti.fr> References: <20210518101252.1484465-1-alex@ghiti.fr> MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Anup Patel , Alexandre Ghiti Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Relocating kernel at runtime is done very early in the boot process, so it is not convenient to check for relocations there and react in case a relocation was not expected. Powerpc architecture has a script that allows to check at compile time for such unexpected relocations: extract the common logic to scripts/ so that other architectures can take advantage of it. Signed-off-by: Alexandre Ghiti Reviewed-by: Anup Patel Acked-by: Michael Ellerman (powerpc) --- arch/powerpc/tools/relocs_check.sh | 18 ++---------------- scripts/relocs_check.sh | 20 ++++++++++++++++++++ 2 files changed, 22 insertions(+), 16 deletions(-) create mode 100755 scripts/relocs_check.sh diff --git a/arch/powerpc/tools/relocs_check.sh b/arch/powerpc/tools/relocs_check.sh index 014e00e74d2b..e367895941ae 100755 --- a/arch/powerpc/tools/relocs_check.sh +++ b/arch/powerpc/tools/relocs_check.sh @@ -15,21 +15,8 @@ if [ $# -lt 3 ]; then exit 1 fi -# Have Kbuild supply the path to objdump and nm so we handle cross compilation. -objdump="$1" -nm="$2" -vmlinux="$3" - -# Remove from the bad relocations those that match an undefined weak symbol -# which will result in an absolute relocation to 0. -# Weak unresolved symbols are of that form in nm output: -# " w _binary__btf_vmlinux_bin_end" -undef_weak_symbols=$($nm "$vmlinux" | awk '$1 ~ /w/ { print $2 }') - bad_relocs=$( -$objdump -R "$vmlinux" | - # Only look at relocation lines. - grep -E '\