From owner-freebsd-alpha Thu Jan 24 11:37:33 2002 Delivered-To: freebsd-alpha@freebsd.org Received: from duke.cs.duke.edu (duke.cs.duke.edu [152.3.140.1]) by hub.freebsd.org (Postfix) with ESMTP id D5C6737B417 for ; Thu, 24 Jan 2002 11:37:29 -0800 (PST) Received: from grasshopper.cs.duke.edu (grasshopper.cs.duke.edu [152.3.145.30]) by duke.cs.duke.edu (8.9.3/8.9.3) with ESMTP id OAA20189; Thu, 24 Jan 2002 14:37:28 -0500 (EST) Received: (from gallatin@localhost) by grasshopper.cs.duke.edu (8.11.6/8.9.1) id g0OJawQ68226; Thu, 24 Jan 2002 14:36:58 -0500 (EST) (envelope-from gallatin@cs.duke.edu) From: Andrew Gallatin MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15440.25178.498060.252753@grasshopper.cs.duke.edu> Date: Thu, 24 Jan 2002 14:36:58 -0500 (EST) To: Volker Stolz Cc: freebsd-alpha@freebsd.org Subject: Re: alpha/34232: rpc.statd throws alignment errors In-Reply-To: <20020124201845.A12480@i2.informatik.rwth-aachen.de> References: <202201241710.20OHA8r00644@varphi.ikea.net> <15440.21386.540347.636057@grasshopper.cs.duke.edu> <20020124201845.A12480@i2.informatik.rwth-aachen.de> X-Mailer: VM 6.75 under 21.1 (patch 12) "Channel Islands" XEmacs Lucid Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Volker Stolz writes: > On Thu, Jan 24, 2002 at 01:33:46PM -0500, Andrew Gallatin wrote: > > Can you build it with symbols, cause a coredump (uac -s or sysctl > > machdep.unaligned_sigbus=1), and show us a backtrace? > (gdb) s > 73 (void)pmap_unset(SM_PROG, SM_VERS); > (gdb) > pid 773 (rpc.statd): unaligned access: va=0x11ffb53c pc=0x1600bdf24 ra=0x1600bdf54 op=ldt You're doing it wrong. You want to cause the unaligned access to crash the program. Then you get the stack trace from the coredump. All I can tell from this information is that its happening in some library (0x1600bdf24 is where libs are mapped). Drew To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message