From nobody Sun Feb 8 23:27:09 2026 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 88E7B18FDA3 for ; Thu, 8 Aug 2024 12:43:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.255 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723121002; cv=none; b=svdAsSCd+CNnZK/NvT9TEvg/rrrzEPOZjP1Y/+cMGd7CcuwM+R9etBJ/N79DT568bo7akJ3/mevwKUjWKfRyKns2LphGF0qddfDbdkYFCXo98+CeU/aZOsCGTVaIxuWqYxZgnPeOYTSo1s7HSFEGmssZfeyfnJTg6u4u8cqoXd8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723121002; c=relaxed/simple; bh=FM5nTZCbakU/OFTUkZ/UmUGvxQS3+8cm7+rI1a5Gsk8=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=slrIqdSDnwv89M/TFahIB287m6VhfaEsEGJFFV/JMKoZleX3UWNG2u9egYaNApx2QhkejHFenzsd9tECNCfJA46kGA3VKiJwgnci8E6kEHUUWUN6MESIDGYwne0xlk6j+6y0Y99RjLcnSJCbCUl5Gbt2LhUtpBFdyBDVOLRholg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.255 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.162.254]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4Wfmsr47jJz1T6t0; Thu, 8 Aug 2024 20:42:56 +0800 (CST) Received: from kwepemg500010.china.huawei.com (unknown [7.202.181.71]) by mail.maildlp.com (Postfix) with ESMTPS id 7DF4B1800FF; Thu, 8 Aug 2024 20:43:18 +0800 (CST) Received: from huawei.com (10.67.174.76) by kwepemg500010.china.huawei.com (7.202.181.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Thu, 8 Aug 2024 20:43:17 +0800 From: Yuntao Liu To: , CC: , , , , , , , , , Subject: [PATCH] arm: Fix build issue with LD_DEAD_CODE_DATA_ELIMINATION Date: Thu, 8 Aug 2024 12:35:56 +0000 Message-ID: <20240808123556.681609-1-liuyuntao12@huawei.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To kwepemg500010.china.huawei.com (7.202.181.71) Content-Type: text/plain; charset="utf-8" There is a build issue with LD segmentation fault, while CONFIG_LD_DEAD_CODE_DATA_ELIMINATION is not enabled, as bellow. scripts/link-vmlinux.sh: line 49: 3796 Segmentation fault (core dumped) ${ld} ${ldflags} -o ${output} ${wl}--whole-archive ${objs} ${wl}--no-whole-archive ${wl}--start-group ${libs} ${wl}--end-group ${kallsymso} ${btf_vmlinux_bin_o} ${ldlibs} The error occurs in older versions of the GNU ld with version earlier than 2.36. It makes most sense to have a minimum LD version as a dependency for HAVE_LD_DEAD_CODE_DATA_ELIMINATION and eliminate the impact of ".reloc .text, R_ARM_NONE, ." when CONFIG_LD_DEAD_CODE_DATA_ELIMINATION is not enabled. Fixes: ed0f94102251 ("ARM: 9404/1: arm32: enable HAVE_LD_DEAD_CODE_DATA_ELI= MINATION") Reported-by: Harith George Suggested-by: Arnd Bergmann Signed-off-by: Yuntao Liu Link: https://lore.kernel.org/all/14e9aefb-88d1-4eee-8288-ef15d4a9b059@gmai= l.com/ Acked-by: Arnd Bergmann Tested-by: Harith George --- arch/arm/Kconfig | 2 +- arch/arm/kernel/entry-armv.S | 12 +++++++++--- 2 files changed, 10 insertions(+), 4 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 54b2bb817a7f..173159e93c99 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -117,7 +117,7 @@ config ARM select HAVE_KERNEL_XZ select HAVE_KPROBES if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !CPU_V7M select HAVE_KRETPROBES if HAVE_KPROBES - select HAVE_LD_DEAD_CODE_DATA_ELIMINATION + select HAVE_LD_DEAD_CODE_DATA_ELIMINATION if (LD_VERSION >=3D 23600 || LD= _IS_LLD) select HAVE_MOD_ARCH_SPECIFIC select HAVE_NMI select HAVE_OPTPROBES if !THUMB2_KERNEL diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index f01d23a220e6..cd443faf8645 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -29,6 +29,12 @@ #include "entry-header.S" #include =20 +#ifdef CONFIG_HAVE_LD_DEAD_CODE_DATA_ELIMINATION +#define RELOC_TEXT_NONE (.reloc .text, R_ARM_NONE, .) +#else +#define RELOC_TEXT_NONE +#endif + /* * Interrupt handling. */ @@ -1065,7 +1071,7 @@ vector_addrexcptn: .globl vector_fiq =20 .section .vectors, "ax", %progbits - .reloc .text, R_ARM_NONE, . + RELOC_TEXT_NONE W(b) vector_rst W(b) vector_und ARM( .reloc ., R_ARM_LDR_PC_G0, .L__vector_swi ) @@ -1079,7 +1085,7 @@ THUMB( .reloc ., R_ARM_THM_PC12, .L__vector_swi ) =20 #ifdef CONFIG_HARDEN_BRANCH_HISTORY .section .vectors.bhb.loop8, "ax", %progbits - .reloc .text, R_ARM_NONE, . + RELOC_TEXT_NONE W(b) vector_rst W(b) vector_bhb_loop8_und ARM( .reloc ., R_ARM_LDR_PC_G0, .L__vector_bhb_loop8_swi ) @@ -1092,7 +1098,7 @@ THUMB( .reloc ., R_ARM_THM_PC12, .L__vector_bhb_loop8= _swi ) W(b) vector_bhb_loop8_fiq =20 .section .vectors.bhb.bpiall, "ax", %progbits - .reloc .text, R_ARM_NONE, . + RELOC_TEXT_NONE W(b) vector_rst W(b) vector_bhb_bpiall_und ARM( .reloc ., R_ARM_LDR_PC_G0, .L__vector_bhb_bpiall_swi ) --=20 2.34.1