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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 4C17FC3A59C for ; Fri, 16 Aug 2019 12:28:45 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1F43A20644 for ; Fri, 16 Aug 2019 12:28:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="iJaDh9rr" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1F43A20644 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=7rpS6MYXrAtKFSB0Esx3MK61wtQfdWJsEoHSDH+60b8=; b=iJaDh9rrDHAAN09Pn7gJIMR9R1 D4jGmZAC72muE23NaaeKXBeeJPhO6m1WQnZBwzxM4pQmHGEA8jHEISUyu1wTpGTp9EzVYI4xZp007 PaXrCIi49iaFtTgcerN6V+xLRd6Dl/1lbD5s8qd21XxZmGrMsgvn4Tsivd++kLarZUMoryH0hVWft kmoXnuC6/WCjb71orjJsH8phQeZo1w9FNgqAqt7/7Nv8Ji6sQboiQi4szethvLODJNUgOjmPHw+vt UzGDqxeNrJM4qrBkFbp7g2BK0CUmldB4OXrCVhUdex91IeV61V2wJ3hVy2AYhTG9l7JGezyWEUTcU d6stWVZg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hybLS-0000aZ-5K; Fri, 16 Aug 2019 12:28:38 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hybHt-0004U6-SQ for linux-arm-kernel@lists.infradead.org; Fri, 16 Aug 2019 12:24:59 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 3E38B360; Fri, 16 Aug 2019 05:24:57 -0700 (PDT) Received: from e121650-lin.cambridge.arm.com (e121650-lin.cambridge.arm.com [10.1.196.120]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 051553F706; Fri, 16 Aug 2019 05:24:55 -0700 (PDT) From: Raphael Gault To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, jpoimboe@redhat.com Subject: [RFC v4 12/18] arm64: assembler: Add macro to annotate asm function having non standard stack-frame. Date: Fri, 16 Aug 2019 13:23:57 +0100 Message-Id: <20190816122403.14994-13-raphael.gault@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190816122403.14994-1-raphael.gault@arm.com> References: <20190816122403.14994-1-raphael.gault@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190816_052458_001338_7A874F9B X-CRM114-Status: UNSURE ( 9.89 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: raph.gault+kdev@gmail.com, peterz@infradead.org, catalin.marinas@arm.com, will.deacon@arm.com, Raphael Gault , julien.thierry.kdev@gmail.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Some functions don't have standard stack-frames but are intended this way. In order for objtool to ignore those particular cases we add a macro that enables us to annotate the cases we chose to mark as particular. Signed-off-by: Raphael Gault --- include/linux/frame.h | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/include/linux/frame.h b/include/linux/frame.h index 02d3ca2d9598..1e35e58ab259 100644 --- a/include/linux/frame.h +++ b/include/linux/frame.h @@ -11,14 +11,31 @@ * * For more information, see tools/objtool/Documentation/stack-validation.txt. */ +#ifndef __ASSEMBLY__ #define STACK_FRAME_NON_STANDARD(func) \ static void __used __section(.discard.func_stack_frame_non_standard) \ *__func_stack_frame_non_standard_##func = func +#else + /* + * This macro is the arm64 assembler equivalent of the + * macro STACK_FRAME_NON_STANDARD define at + * ~/include/linux/frame.h + */ + .macro asm_stack_frame_non_standard func + .pushsection ".discard.func_stack_frame_non_standard" + .quad \func + .popsection + .endm +#endif /* __ASSEMBLY__ */ #else /* !CONFIG_STACK_VALIDATION */ +#ifndef __ASSEMBLY__ #define STACK_FRAME_NON_STANDARD(func) - +#else + .macro asm_stack_frame_non_standard func + .endm +#endif /* __ASSEMBLY__ */ #endif /* CONFIG_STACK_VALIDATION */ #endif /* _LINUX_FRAME_H */ -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel