Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1751533AbdGaWGe (ORCPT <rfc822;w@1wt.eu>);
        Mon, 31 Jul 2017 18:06:34 -0400
Received: from shards.monkeyblade.net ([184.105.139.130]:46270 "EHLO
        shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1751102AbdGaWGd (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Mon, 31 Jul 2017 18:06:33 -0400
Date: Mon, 31 Jul 2017 15:06:32 -0700 (PDT)
Message-Id: <20170731.150632.885106324164202893.davem@davemloft.net>
To: matorola@gmail.com
Cc: mikpelinux@gmail.com, sparclinux@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: strace-4.18 test suite oopses sparc64 4.12 and 4.13-rc kernels
From: David Miller <davem@davemloft.net>
In-Reply-To: <CADxRZqz+oQn8=Q3RDtfko9ctP1RE41XnsVP3H8RXJuE9m=VPLw@mail.gmail.com>
References: <CADxRZqzkUqWsHgw8eNHF4E_wi5a6d=hJnmEtm5omsw42tHAw+Q@mail.gmail.com>
        <20170731.145151.571917275997786929.davem@davemloft.net>
        <CADxRZqz+oQn8=Q3RDtfko9ctP1RE41XnsVP3H8RXJuE9m=VPLw@mail.gmail.com>
X-Mailer: Mew version 6.7 on Emacs 25.2 / Mule 6.0 (HANACHIRUSATO)
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Mon, 31 Jul 2017 15:06:33 -0700 (PDT)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 673
Lines: 24

From: Anatoly Pugachev <matorola@gmail.com>
Date: Tue, 1 Aug 2017 01:01:47 +0300

> I don't know how to run on a running kernel , but as I understood:
> 
> root@v215:strace# gzip -dc /boot/vmlinuz-4.12.0 > vmlinux
> root@v215:strace# gdb -q vmlinux
> Reading symbols from vmlinux...(no debugging symbols found)...done.
> (gdb) x/20i 0x49b294 - 16

Unfortunately you need to do this on the build kernel image before it
has been stripped of all of it's symbols.

Mikael, you built your kernels right?

Go into one of your OOPS's and extract the "RPC: " hex value, and run
the gdb command:

bash$ cd src/linux
bash$ gdb ./vmlinux
(gdb) x/10i 0x${RPC_HEX_VALUE} - 16

Thanks.