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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 98DA1C433EF for ; Thu, 21 Oct 2021 10:07:30 +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 65682610C8 for ; Thu, 21 Oct 2021 10:07:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 65682610C8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=//x6XgnF+UdpjyjzWAY54V43uiBOpZ9v6Pzuo4RAjM4=; b=g/WzlpnDQfeAWa ejEcTtn1YXxL9wUPXk7g3Qprl9ZyYtJClG+/53jV9FrIXIdtTdJIHyvX/j2ILuUayv9SXXDbaWsi7 9Boexc1vlP5N5+8LHRZK/Bdp2TL7Chb6pbG6B6MD8ISJI7fHQLUX1shQTtX78tGeu6lRykaZybs0r KivOBToj+Uf37mw78NwgdYSOivVhk/PqklH7k1Yvgt9j/cY2LpJu/z4tGd4yKdx03j9k4OIQzIXg4 9fV1M3+0Oi4BvDaTIRQcJR9+zSlRBF/SKk8MHPegtX0dsx840N7ZEbbZeqQKO8RUXnOxXjky2V3RQ sH1At7VNrmse1woIPSGg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mdUxn-0079Eu-3N; Thu, 21 Oct 2021 10:06:19 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mdUxW-0079B3-9Y for linux-arm-kernel@lists.infradead.org; Thu, 21 Oct 2021 10:06:03 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 01C3361186; Thu, 21 Oct 2021 10:05:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1634810762; bh=3VcBurFfAc6GniW4qG3E3ujAB/60KbtMPWjBBZSL+Vg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=l9L4MxFTb7HcDY9mNbb0AzU+8ASbRAichLhgZEmfeGtCK8tdcZpQlFLoC8PK7q6xf kG50VBJyQOERbIYmRuxcdySqO00ZJPMKrBaa6u7x39N9PzI51EW9D/AWlW0jPVqXGP zr1lTSl+foMt7rWpeSBfWMyszuO/zQ0HUWC3phVhx5iUMQ8dG4fhLRV7FIbAdkDP4Q Yj1eF+it9QsOBcpGnCmPk2JzNO64ynjBQlfVWYzk0Zug9wPrw7qROLkSNRXPP/tYXb y7va+/JKQSAODmwFw3/FfYzZBDkt6ZVtEdLh/NL24avf3KR7C8yfZLN7D9RSqDjOq3 3FGD+84Zyy6vw== From: Will Deacon To: Mark Rutland , linux-arm-kernel@lists.infradead.org Cc: catalin.marinas@arm.com, kernel-team@android.com, Will Deacon , dvyukov@google.com, jpoimboe@redhat.com, jean-philippe@linaro.org, alexandru.elisei@arm.com, robin.murphy@arm.com, ardb@kernel.org, daniel@iogearbox.net, ast@kernel.org, andrii@kernel.org, james.morse@arm.com, maz@kernel.org, suzuki.poulose@arm.com, peterz@infradead.org, broonie@kernel.org Subject: Re: [PATCH v2 00/13] arm64: extable: remove anonymous out-of-line fixups Date: Thu, 21 Oct 2021 11:05:48 +0100 Message-Id: <163480952339.754404.256652246298986805.b4-ty@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20211019160219.5202-1-mark.rutland@arm.com> References: <20211019160219.5202-1-mark.rutland@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211021_030602_398908_3E65B31C X-CRM114-Status: UNSURE ( 7.34 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, 19 Oct 2021 17:02:06 +0100, Mark Rutland wrote: > We recently realised that out-of-line extable fixups cause a number of problems > for backtracing (mattering both for developers and for RELIABLE_STACKTRACE and > LIVEPATCH). Dmitry spotted a confusing backtrace, which we identified was due > to problems with unwinding fixups, as summarized in: > > https://lore.kernel.org/linux-arm-kernel/20210927171812.GB9201@C02TD0UTHF1T.local/ > > [...] Applied to arm64 (for-next/extable), thanks! [01/13] arm64: lib: __arch_clear_user(): fold fixups into body https://git.kernel.org/arm64/c/35d67794b882 [02/13] arm64: lib: __arch_copy_from_user(): fold fixups into body https://git.kernel.org/arm64/c/4012e0e22739 [03/13] arm64: lib: __arch_copy_to_user(): fold fixups into body https://git.kernel.org/arm64/c/139f9ab73d60 [04/13] arm64: kvm: use kvm_exception_table_entry https://git.kernel.org/arm64/c/ae2b2f3384c6 [05/13] arm64: factor out GPR numbering helpers https://git.kernel.org/arm64/c/8ed1b498ada6 [06/13] arm64: gpr-num: support W registers https://git.kernel.org/arm64/c/286fba6c2a45 [07/13] arm64: extable: consolidate definitions https://git.kernel.org/arm64/c/819771cc2892 [08/13] arm64: extable: make fixup_exception() return bool https://git.kernel.org/arm64/c/e8c328d7de03 [09/13] arm64: extable: use `ex` for `exception_table_entry` https://git.kernel.org/arm64/c/5d0e79051425 [10/13] arm64: extable: add `type` and `data` fields https://git.kernel.org/arm64/c/d6e2cc564775 [11/13] arm64: extable: add a dedicated uaccess handler https://git.kernel.org/arm64/c/2e77a62cb3a6 [12/13] arm64: extable: add load_unaligned_zeropad() handler https://git.kernel.org/arm64/c/753b32368705 [13/13] arm64: vmlinux.lds.S: remove `.fixup` section https://git.kernel.org/arm64/c/bf6e667f4738 Cheers, -- Will https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel