From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4C3EFB0B.7050801@domain.hid> Date: Thu, 15 Jul 2010 14:11:55 +0200 From: Gilles Chanteperdrix MIME-Version: 1.0 References: In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-help] [RTnet-users] Alignment problem List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Cyril Wallois Cc: xenomai@xenomai.org Cyril Wallois wrote: > Hi everybody, > > I have try to solve my problem by using a newer kernel (2.6.30) without > success, I have always the same issue with rtnet when I try rtping : > > #./rtping 127.0.0.1 > Xenomai: suspending kernel thread bf009310 ('rtnet-rtpc') at 0xc002d3c8 > after exception #0 Why simply not disassembling the kernel and looking at what is at 0xc002d3c8 and looking at the values of the registers? It is entirely possible that the RTnet IP stack requires unaligned accesses (the vanilla kernel does it, notably for handling of IP options), and as you may know it, unaligned accesses may require software emulation on some platforms. However, I am not sure you would get an exception #0 in that case. Your post does not even tell us on what platform you get this issue, though I suspect this is ARM. -- Gilles.