From nobody Mon May 11 00:10:32 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 85165C433F5 for ; Wed, 20 Apr 2022 17:17:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1380985AbiDTRTx (ORCPT ); Wed, 20 Apr 2022 13:19:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37652 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235399AbiDTRTu (ORCPT ); Wed, 20 Apr 2022 13:19:50 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id A78762AE03 for ; Wed, 20 Apr 2022 10:17:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1650475021; h=from:from: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; bh=JRTQdz7k3QyXl1nguutC/5GuEnESB/6++gRUTGvX3dg=; b=a+SLJMSL3y8oiUwFTrnlecWblTAGBs0fgWKSdoRFxodqwAJL1WXxS6O7R8cfULt3p05I0C shXUEGB/rtZ+/0nSWZutcrMjpsyCx/0QeqbgogibiH7iCN+4YjyN7rvKKmL9D7uYqPZiIt 7FgzIdkoRyeQroTDkxOxxZ5A0D4dCrs= Received: from mail-qv1-f71.google.com (mail-qv1-f71.google.com [209.85.219.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-269-XShcPS7oO3KXqEEQgu9M8w-1; Wed, 20 Apr 2022 13:17:00 -0400 X-MC-Unique: XShcPS7oO3KXqEEQgu9M8w-1 Received: by mail-qv1-f71.google.com with SMTP id eo13-20020ad4594d000000b004466661ece9so2043029qvb.1 for ; Wed, 20 Apr 2022 10:17:00 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=JRTQdz7k3QyXl1nguutC/5GuEnESB/6++gRUTGvX3dg=; b=m8Yo720LiIlzbGIujc7IURo2djKCqcXkhqdz80XAjq4t0bhefgS2KYJr/mplrugNj5 CrltQUSOS4ENwptE+R8FanyateICy1o5rBaXGaDHhUtdWXfj3YFiYVXg4Le3su1fcmnR 1rby/QwlTgzNL3D16pNoQaS0YTZJOkQ/1W6tIufjRu/IbuAnRpBiKegPcMOOTfD7HIv0 ycsk4uL6sOhHeuEJVuRb+SxglYMVzxOud38L8epf+tx+7ClDoNb3FICPrf8EvtG2Uk2H J3mjvTkKOulFl9V8hBpzywA7BxCszgPAYJeB4y7FHAytVoCiIe3C4BIz1yPCMKBKzqPe q4TQ== X-Gm-Message-State: AOAM532d8lhrEaMzmszw4CQZueawaN7H+BloWV6R/rn9wo6zQ1kFAthL pTb+OLTjNhxP/zlSLx7LOaSBTmKCOrcV+zhzG7WBOOsdZdIXOj5brXbthjQjewP4KHYabRY1Sar Vy3wlHPVUpGcKeiYNvyqHM43q X-Received: by 2002:a05:6214:20af:b0:446:787a:e748 with SMTP id 15-20020a05621420af00b00446787ae748mr6247886qvd.79.1650475019579; Wed, 20 Apr 2022 10:16:59 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxhOb2zgeMG0T9KiPewT+EWwvGUOcYT3XD5i0EH16FGy+E8cOWTCAUE7r8/woeT/FOxsruxFQ== X-Received: by 2002:a05:6214:20af:b0:446:787a:e748 with SMTP id 15-20020a05621420af00b00446787ae748mr6247865qvd.79.1650475019233; Wed, 20 Apr 2022 10:16:59 -0700 (PDT) Received: from treble.redhat.com ([2600:1700:6e32:6c00::35]) by smtp.gmail.com with ESMTPSA id k66-20020a37ba45000000b0069c5adb2f2fsm1805751qkf.6.2022.04.20.10.16.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Apr 2022 10:16:58 -0700 (PDT) From: Josh Poimboeuf To: Peter Zijlstra Cc: linux-kernel@vger.kernel.org, x86@kernel.org, Miroslav Benes , Borislav Petkov Subject: [PATCH v3] scripts: Create objdump-func helper script Date: Wed, 20 Apr 2022 10:16:36 -0700 Message-Id: <4d3ab1f17230f0188698cfbc7ba08696fe1abfe9.1650474927.git.jpoimboe@redhat.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add a simple script which disassembles a single function from an object file. Comes in handy for objtool warnings and kernel stack traces. Originally-by: Peter Zijlstra Signed-off-by: Josh Poimboeuf Acked-by: Borislav Petkov --- v3: - Add usage - Fix vmlinux scripts/objdump-func | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100755 scripts/objdump-func diff --git a/scripts/objdump-func b/scripts/objdump-func new file mode 100755 index 000000000000..0908f9f616c3 --- /dev/null +++ b/scripts/objdump-func @@ -0,0 +1,25 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Disassemble a single function. +# +# usage: objdump-func + +set -o errexit +set -o nounset + +OBJDUMP=3D"${CROSS_COMPILE:-}objdump" + +command -v gawk >/dev/null 2>&1 || die "gawk isn't installed" + +usage() { + echo "usage: objdump-func " >&2 + exit 1 +} + +[[ $# -ne 2 ]] && usage + +OBJ=3D$1; shift +FUNC=3D$1; shift + +${OBJDUMP} -wdr $OBJ | gawk -M -v f=3D$FUNC '/^$/ { P=3D0; } $0 ~ "<" f ">= :" { P=3D1; O=3Dstrtonum("0x" $1); } { if (P) { o=3Dstrtonum("0x" $1); prin= tf("%04x ", o-O); print $0; } }' --=20 2.34.1