From nobody Mon Apr 13 20:19:20 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61C76C4332F for ; Wed, 16 Nov 2022 09:58:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232371AbiKPJ6B (ORCPT ); Wed, 16 Nov 2022 04:58:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230113AbiKPJ5u (ORCPT ); Wed, 16 Nov 2022 04:57:50 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B6699175B0; Wed, 16 Nov 2022 01:57:49 -0800 (PST) Date: Wed, 16 Nov 2022 09:57:46 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1668592667; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/BB+ucvWV0kFUPadADn4TTS4/yULan76KkzlFoRsm0Q=; b=4RFgpdOVjQRrzw5QqeItJWa3vp+Jl952HXbXFQBRDbwHwvpSQyZPlzBOvK0AdcIBD5sRWm A2vlpVGcjqRDNNCjtgtmEwwq2DcMbv3U+1xWWrn5+1L4HcvyDv8ygq+gUO3BOZU78vjwDk 3X2rA+Uh+APDdC2INPI+8qkOQggQTFWW5NGe4PKy3ruoI81OfnZJZjIFBbmbD6T4WPbXi8 KizvqU4O6dkACs6ZtfqESpc/nDEzvmFlpuAC+OHTOzdpVL3PjwMEpu2BCFR8BnDnc46bIu /FQXzFOMncUPeERYaV16LM/VtLixeIfATbtrFjaLFWknkmlMU8DmBcDES85fHQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1668592667; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/BB+ucvWV0kFUPadADn4TTS4/yULan76KkzlFoRsm0Q=; b=z+1dUe97sEOWLw/cegGzba+3BTH6AeeymeXuLjEC06H5XKj65i4zOAyqUoxihVZIoifen3 o6paqU+yJCdKh3AA== From: "tip-bot2 for Srikar Dronamraju" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: objtool/urgent] scripts/faddr2line: Fix regression in name resolution on ppc64le Cc: Srikar Dronamraju , "Naveen N. Rao" , Thadeu Lima de Souza Cascardo , Josh Poimboeuf , Peter Zijlstra , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20220927075211.897152-1-srikar@linux.vnet.ibm.com> References: <20220927075211.897152-1-srikar@linux.vnet.ibm.com> MIME-Version: 1.0 Message-ID: <166859266638.4906.8897216149530448372.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the objtool/urgent branch of tip: Commit-ID: 2d77de1581bb5b470486edaf17a7d70151131afd Gitweb: https://git.kernel.org/tip/2d77de1581bb5b470486edaf17a7d7015= 1131afd Author: Srikar Dronamraju AuthorDate: Tue, 27 Sep 2022 13:22:11 +05:30 Committer: Peter Zijlstra CommitterDate: Wed, 16 Nov 2022 10:42:10 +01:00 scripts/faddr2line: Fix regression in name resolution on ppc64le Commit 1d1a0e7c5100 ("scripts/faddr2line: Fix overlapping text section failures") can cause faddr2line to fail on ppc64le on some distributions, while it works fine on other distributions. The failure can be attributed to differences in the readelf output. $ ./scripts/faddr2line vmlinux find_busiest_group+0x00 no match for find_busiest_group+0x00 On ppc64le, readelf adds the localentry tag before the symbol name on some distributions, and adds the localentry tag after the symbol name on other distributions. This problem has been discussed previously: https://lore.kernel.org/bpf/20191211160133.GB4580@calabresa/ This problem can be overcome by filtering out the localentry tags in the readelf output. Similar fixes are already present in the kernel by way of the following commits: 1fd6cee127e2 ("libbpf: Fix VERSIONED_SYM_COUNT number parsing") aa915931ac3e ("libbpf: Fix readelf output parsing for Fedora") [jpoimboe: rework commit log] Fixes: 1d1a0e7c5100 ("scripts/faddr2line: Fix overlapping text section fail= ures") Signed-off-by: Srikar Dronamraju Acked-by: Naveen N. Rao Reviewed-by: Thadeu Lima de Souza Cascardo Link: https://lore.kernel.org/r/20220927075211.897152-1-srikar@linux.vnet.i= bm.com Signed-off-by: Josh Poimboeuf Signed-off-by: Peter Zijlstra --- scripts/faddr2line | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/scripts/faddr2line b/scripts/faddr2line index 5514c23..0e73aca 100755 --- a/scripts/faddr2line +++ b/scripts/faddr2line @@ -74,7 +74,8 @@ command -v ${ADDR2LINE} >/dev/null 2>&1 || die "${ADDR2LI= NE} isn't installed" find_dir_prefix() { local objfile=3D$1 =20 - local start_kernel_addr=3D$(${READELF} --symbols --wide $objfile | ${AWK}= '$8 =3D=3D "start_kernel" {printf "0x%s", $2}') + local start_kernel_addr=3D$(${READELF} --symbols --wide $objfile | sed 's= /\[.*\]//' | + ${AWK} '$8 =3D=3D "start_kernel" {printf "0x%s", $2}') [[ -z $start_kernel_addr ]] && return =20 local file_line=3D$(${ADDR2LINE} -e $objfile $start_kernel_addr) @@ -178,7 +179,7 @@ __faddr2line() { found=3D2 break fi - done < <(${READELF} --symbols --wide $objfile | ${AWK} -v sec=3D$sym_sec= '$7 =3D=3D sec' | sort --key=3D2) + done < <(${READELF} --symbols --wide $objfile | sed 's/\[.*\]//' | ${AWK= } -v sec=3D$sym_sec '$7 =3D=3D sec' | sort --key=3D2) =20 if [[ $found =3D 0 ]]; then warn "can't find symbol: sym_name: $sym_name sym_sec: $sym_sec sym_addr= : $sym_addr sym_elf_size: $sym_elf_size" @@ -259,7 +260,7 @@ __faddr2line() { =20 DONE=3D1 =20 - done < <(${READELF} --symbols --wide $objfile | ${AWK} -v fn=3D$sym_name = '$4 =3D=3D "FUNC" && $8 =3D=3D fn') + done < <(${READELF} --symbols --wide $objfile | sed 's/\[.*\]//' | ${AWK}= -v fn=3D$sym_name '$4 =3D=3D "FUNC" && $8 =3D=3D fn') } =20 [[ $# -lt 2 ]] && usage