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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 9D588C004D3 for ; Wed, 24 Oct 2018 14:48:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 651F52082E for ; Wed, 24 Oct 2018 14:48:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 651F52082E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727050AbeJXXQm (ORCPT ); Wed, 24 Oct 2018 19:16:42 -0400 Received: from mga14.intel.com ([192.55.52.115]:32896 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726457AbeJXXQm (ORCPT ); Wed, 24 Oct 2018 19:16:42 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 24 Oct 2018 07:48:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,420,1534834800"; d="scan'208";a="94661264" Received: from tassilo.jf.intel.com (HELO tassilo.localdomain) ([10.7.201.126]) by orsmga003.jf.intel.com with ESMTP; 24 Oct 2018 07:48:18 -0700 Received: by tassilo.localdomain (Postfix, from userid 1000) id 4F55B30137B; Wed, 24 Oct 2018 07:48:18 -0700 (PDT) Date: Wed, 24 Oct 2018 07:48:18 -0700 From: Andi Kleen To: Milian Wolff Cc: linux-kernel@vger.kernel.org, Jiri Olsa , namhyung@kernel.org, linux-perf-users@vger.kernel.org, Arnaldo Carvalho Subject: Re: Broken dwarf unwinding - wrong stack pointer register value? Message-ID: <20181024144818.GF6218@tassilo.jf.intel.com> References: <2335309.gnWok9HYb4@agathebauer> <2679413.U8bCfAhSQu@agathebauer> <20181023040356.GA6218@tassilo.jf.intel.com> <2086866.px82jjA6i7@agathebauer> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2086866.px82jjA6i7@agathebauer> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > Can someone at least confirm whether unwinding from a function prologue via > .eh_frame (but without .debug_frame) should actually be possible? Yes it should be possible. Asynchronous unwind tables should work from any instruction. -Andi