From patchwork Mon Jun 24 09:55:42 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raphael Gault X-Patchwork-Id: 11012829 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CE379924 for ; Mon, 24 Jun 2019 10:00:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B77EE26E4A for ; Mon, 24 Jun 2019 10:00:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A8BED28844; Mon, 24 Jun 2019 10:00:44 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3C3B526E4A for ; Mon, 24 Jun 2019 10:00:44 +0000 (UTC) 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=1dIAQsu4ynw9K9UaUNH65NFAMxOOUFdDOTFE01uz4LI=; b=VHTrFA0xNtuwU6/PzVHZ76TwjI S/NLVbXguoFBCnHrOUMBoPrfCR0RTFtff1L1xs7nxJgx7Ot/zwZ0WiVoc4zO9Pke9LpskU2pj8g0B fcRRCKGGpp5dpRtNMnfmbT6Vdi/fAa8XmXEXP469POY7LYyLuQEHFd4nXrmarxoeKgjAsNIsKeSxb 7LM/+f/sK+gCtnKzTxjLB0SqZEODq2CVXAr774RH5d5Dv2AzXr1iM91KX650E7qK52jEux5ORDGOg xRUvq/6wpfnkRHoZvSGHKiOb56D+M2TAU5ivdJt3OzYjTzv7Q9rX5wJ3jfAMbUTiBoQWBz1lUQVq4 qEfx+wpw==; 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 1hfLm8-0001co-Nr; Mon, 24 Jun 2019 10:00:36 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hfLi7-0005In-RW for linux-arm-kernel@lists.infradead.org; Mon, 24 Jun 2019 09:56:29 +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 67982152F; Mon, 24 Jun 2019 02:56:27 -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 493943F71E; Mon, 24 Jun 2019 02:56:26 -0700 (PDT) From: Raphael Gault To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [RFC V3 12/18] arm64: assembler: Add macro to annotate asm function having non standard stack-frame. Date: Mon, 24 Jun 2019 10:55:42 +0100 Message-Id: <20190624095548.8578-13-raphael.gault@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190624095548.8578-1-raphael.gault@arm.com> References: <20190624095548.8578-1-raphael.gault@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190624_025627_986944_CC97F654 X-CRM114-Status: UNSURE ( 8.41 ) 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: julien.thierry@arm.com, peterz@infradead.org, catalin.marinas@arm.com, will.deacon@arm.com, Raphael Gault , jpoimboe@redhat.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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 --- arch/arm64/include/asm/assembler.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h index 570d195a184d..969a59c5c276 100644 --- a/arch/arm64/include/asm/assembler.h +++ b/arch/arm64/include/asm/assembler.h @@ -752,4 +752,17 @@ USER(\label, ic ivau, \tmp2) // invalidate I line PoU .Lyield_out_\@ : .endm + /* + * 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 +#ifdef CONFIG_STACK_VALIDATION + .pushsection ".discard.func_stack_frame_non_standard" + .8byte \func + .popsection +#endif + .endm + #endif /* __ASM_ASSEMBLER_H */