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=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 A53EBC4742C for ; Tue, 3 Nov 2020 20:52:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 75FAC2053B for ; Tue, 3 Nov 2020 20:52:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604436725; bh=H3G44qbQAITOO6bZ1fztfglq3CuR2dP/tHKa+SDyBAk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=w0T7Ase0C5k613JaPOdb5+QUohZzr9QHE/Dbg7DOerKqNdD9vgAfhoW27yT8L9Q// UzVfGwlRyTvReaEo48Ptvqir3QIH1sIII7BYr8F5OE+z6yWSfvyxSiWUH5wkZ+j7E3 dwELvP06YOBzUOePdXPejNg0sjF5xoP7p3WrVTVY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730984AbgKCUwE (ORCPT ); Tue, 3 Nov 2020 15:52:04 -0500 Received: from mail.kernel.org ([198.145.29.99]:47926 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732027AbgKCUwA (ORCPT ); Tue, 3 Nov 2020 15:52:00 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 73E412053B; Tue, 3 Nov 2020 20:51:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604436719; bh=H3G44qbQAITOO6bZ1fztfglq3CuR2dP/tHKa+SDyBAk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hwd7U/cEgq1kQKUL3tgL1dNmby6GKKObWo77ZfGAKcBSc93NpWBA7w5UZ0l0gKyB+ wTXO5Wo3WHFOahbx3rjGId+fQI9NTv+rEN5RP6OZWBGr5pFfgQyJbR8X8WpNvapNeQ Hok43nvK8SG6B0UPqbbT1b4xULVoXcKCBHc2A6B8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sami Tolvanen , Fangrui Song , Nick Desaulniers , Will Deacon Subject: [PATCH 5.9 372/391] arm64: Change .weak to SYM_FUNC_START_WEAK_PI for arch/arm64/lib/mem*.S Date: Tue, 3 Nov 2020 21:37:03 +0100 Message-Id: <20201103203412.248276804@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201103203348.153465465@linuxfoundation.org> References: <20201103203348.153465465@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Fangrui Song commit ec9d78070de986ecf581ea204fd322af4d2477ec upstream. Commit 39d114ddc682 ("arm64: add KASAN support") added .weak directives to arch/arm64/lib/mem*.S instead of changing the existing SYM_FUNC_START_PI macros. This can lead to the assembly snippet `.weak memcpy ... .globl memcpy` which will produce a STB_WEAK memcpy with GNU as but STB_GLOBAL memcpy with LLVM's integrated assembler before LLVM 12. LLVM 12 (since https://reviews.llvm.org/D90108) will error on such an overridden symbol binding. Use the appropriate SYM_FUNC_START_WEAK_PI instead. Fixes: 39d114ddc682 ("arm64: add KASAN support") Reported-by: Sami Tolvanen Signed-off-by: Fangrui Song Tested-by: Sami Tolvanen Tested-by: Nick Desaulniers Reviewed-by: Nick Desaulniers Cc: Link: https://lore.kernel.org/r/20201029181951.1866093-1-maskray@google.com Signed-off-by: Will Deacon Signed-off-by: Greg Kroah-Hartman --- arch/arm64/lib/memcpy.S | 3 +-- arch/arm64/lib/memmove.S | 3 +-- arch/arm64/lib/memset.S | 3 +-- 3 files changed, 3 insertions(+), 6 deletions(-) --- a/arch/arm64/lib/memcpy.S +++ b/arch/arm64/lib/memcpy.S @@ -56,9 +56,8 @@ stp \reg1, \reg2, [\ptr], \val .endm - .weak memcpy SYM_FUNC_START_ALIAS(__memcpy) -SYM_FUNC_START_PI(memcpy) +SYM_FUNC_START_WEAK_PI(memcpy) #include "copy_template.S" ret SYM_FUNC_END_PI(memcpy) --- a/arch/arm64/lib/memmove.S +++ b/arch/arm64/lib/memmove.S @@ -45,9 +45,8 @@ C_h .req x12 D_l .req x13 D_h .req x14 - .weak memmove SYM_FUNC_START_ALIAS(__memmove) -SYM_FUNC_START_PI(memmove) +SYM_FUNC_START_WEAK_PI(memmove) cmp dstin, src b.lo __memcpy add tmp1, src, count --- a/arch/arm64/lib/memset.S +++ b/arch/arm64/lib/memset.S @@ -42,9 +42,8 @@ dst .req x8 tmp3w .req w9 tmp3 .req x9 - .weak memset SYM_FUNC_START_ALIAS(__memset) -SYM_FUNC_START_PI(memset) +SYM_FUNC_START_WEAK_PI(memset) mov dst, dstin /* Preserve return value. */ and A_lw, val, #255 orr A_lw, A_lw, A_lw, lsl #8