From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 46616C433E0 for ; Tue, 12 Jan 2021 21:56:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F0CE7208B3 for ; Tue, 12 Jan 2021 21:56:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2437520AbhALVe3 (ORCPT ); Tue, 12 Jan 2021 16:34:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58260 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2436920AbhALU2c (ORCPT ); Tue, 12 Jan 2021 15:28:32 -0500 Received: from mail-pg1-x534.google.com (mail-pg1-x534.google.com [IPv6:2607:f8b0:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F3F6AC061575 for ; Tue, 12 Jan 2021 12:27:51 -0800 (PST) Received: by mail-pg1-x534.google.com with SMTP id p18so2191956pgm.11 for ; Tue, 12 Jan 2021 12:27:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=+1M3GesbgTSmOd2h7c4OH51TFpiZEy46zgQiOOCDaG8=; b=UUnF4LkMhWNZELMiMXlsNEOijuryuhnZoC6pF/VoVBc72vRes6Rvhjl2R/8nUE0HBD VUMHE8cTN3oAC99mUOcH3O1lEsrUrcFMwfWtEfmyR/7Vk5h4A0TEufghlh75rUhI3ny7 Ek+jkSRiGyGUYJpnksD/WbLA3UDkzNDeAeHDM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=+1M3GesbgTSmOd2h7c4OH51TFpiZEy46zgQiOOCDaG8=; b=S8/kBR2+CDiAjml6uNWz9xWVMrBouPq413IwcLJovFQ8f5rSL+B3xABL9AQQqY8CIv ISU6Mt6v9hNrggsCAahBj9mngBXFdRgmwKUo9fOU5dnjTyG8sPhYi3G4Mx5JeDi3fMKt KsELnfI7oPgmSI2Mc0DKQoq2zaarizq36be+MnY2tZa5MjSj3jbRTbG4XmGOg4cxEoqM df4jHbKV5ffn4nd2oe0vOFMZzl/AyLjcfOStBjsYhjMRNO7aQ4K4XuNqnz1lniMVCuL3 mquewy2b/yjkQv+jAXmhJwDIakbFOU2gtPh18JpseDK3vTQrtGaHBpzSIZdk82eXY3Sl Si8w== X-Gm-Message-State: AOAM531Ehwp/mYJ3JmAYPDG8dr6KIVMrgkBNfBhIZwMbvx6SSag74mtr mgtm8WNeRTpMEc5beB92s4HKjg== X-Google-Smtp-Source: ABdhPJy9YmRGBxfvvgvUymkpFG+zoygKea02X2kwbSpCsfLveKRHblB3sCeYdtAMiOGgZ/S1ph8yvQ== X-Received: by 2002:a62:4e95:0:b029:1a3:a372:8b3c with SMTP id c143-20020a624e950000b02901a3a3728b3cmr1009973pfb.28.1610483271533; Tue, 12 Jan 2021 12:27:51 -0800 (PST) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id d10sm4096844pfn.218.2021.01.12.12.27.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Jan 2021 12:27:50 -0800 (PST) Date: Tue, 12 Jan 2021 12:27:49 -0800 From: Kees Cook To: Arnd Bergmann Cc: Russell King , Nathan Chancellor , Nick Desaulniers , Arnd Bergmann , Catalin Marinas , Vladimir Murzin , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com Subject: Re: [PATCH] ARM: fix link warning with XIP + frame-pointer Message-ID: <202101121227.446CE291@keescook> References: <20210112154658.850192-1-arnd@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210112154658.850192-1-arnd@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 12, 2021 at 04:46:40PM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann > > When frame pointers are used instead of the ARM unwinder, > and the kernel is built using clang with an external assembler > and CONFIG_XIP_KERNEL, every file produces two warnings > like: > > arm-linux-gnueabi-ld: warning: orphan section `.ARM.extab' from `net/mac802154/util.o' being placed in section `.ARM.extab' > arm-linux-gnueabi-ld: warning: orphan section `.ARM.exidx' from `net/mac802154/util.o' being placed in section `.ARM.exidx' > > The same fix was already merged for the normal (non-XIP) > linker script, with a longer description. > > Fixes: c39866f268f8 ("arm/build: Always handle .ARM.exidx and .ARM.extab sections") > Signed-off-by: Arnd Bergmann Reviewed-by: Kees Cook -- Kees Cook