Received: by 2002:ac0:aa62:0:0:0:0:0 with SMTP id w31-v6csp693179ima; Wed, 24 Oct 2018 07:49:24 -0700 (PDT) X-Google-Smtp-Source: AJdET5dueN+P9WKAquWmpe+vTLOZmc6YqoRJ9pTIG+szBxE4kVn3djbV9HpclhkWkGevYdpT8AkG X-Received: by 2002:a63:8c0b:: with SMTP id m11-v6mr2852279pgd.422.1540392564342; Wed, 24 Oct 2018 07:49:24 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1540392564; cv=none; d=google.com; s=arc-20160816; b=PCnrzpHHRMmqAPLHhKvveqF9svqOhDARx0X+KoyuPvHxPku1TV0OKgJ7JsP3zhTn+k t3TVtfgubjh2kq6MDEVvHM/Vlm0RyEbG7I7LH/Nnpwb5fSWii8H2XeBOOYG3YAfTY7Wr 8ZDKZMYyg0HgTahZBbTVoG6PJyPWk09qxfL03doZmnJ152oHOUrN/a1lFfJMpIWJosF8 GzJRzqKnkOys58/ty/GKPoKiPKgIH/Q8u20/iuQZsk+6LlX6fLjwgX3rVHMV/ytewfl+ Z4WjYrY+EAzTG3Hq3X09Rts4L3bHaF47Lz3Z43Il4R50/VHmVQ6g6LNV02JUGw+C04i/ btHA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=C3hvS/fYuLHUbSsbOxOjGW8ViqQS5tVBX3uxsSUWZf4=; b=G66aPQwWzotoNcz/cMJp/fbYoMEM/LMBHYx2g7B3AG2bhUsW96O53ZsIgbMYvlGgsY kmUItzMLmYAVh/PSq+7q87XIkk7c/EErnloUCfSRBWcQJN1szjNrYO5Zu1yMY5tXV+fE a9VHaORV+XXwXj40Q0NYpz3bKHfPyurTi5cf/zFwgLycx30o8Fk2j4oDcrh43T8j5yMF Y4nBRUFWV5bk52nJBSY+hn+Oc6DxAUnR0A+dgWWB4EBQO/0bttMxEokvEapQYOrFjQMO E7RycmWEfPtSPCecPuLShx9ag9xpodaAZ05pnAKGhG/rMHlpHqdKuev1ljHYPBmzN9s8 oR2w== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id a21-v6si4657256pff.126.2018.10.24.07.49.08; Wed, 24 Oct 2018 07:49:24 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727033AbeJXXQm (ORCPT + 99 others); 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