From owner-freebsd-alpha@FreeBSD.ORG Fri Nov 19 09:32:48 2004 Return-Path: Delivered-To: freebsd-alpha@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id CBFC316A4CE; Fri, 19 Nov 2004 09:32:48 +0000 (GMT) Received: from ford.blinkenlights.nl (ford.blinkenlights.nl [213.204.211.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2AC9643D49; Fri, 19 Nov 2004 09:32:48 +0000 (GMT) (envelope-from sten@blinkenlights.nl) Received: from tea.blinkenlights.nl (tea.blinkenlights.nl [IPv6:2001:960:301:3:a00:20ff:fe85:fa39]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ford.blinkenlights.nl (Postfix) with ESMTP id 9EC983E434; Fri, 19 Nov 2004 10:32:46 +0100 (CET) Received: by tea.blinkenlights.nl (Postfix, from userid 101) id 2095D286; Fri, 19 Nov 2004 10:32:46 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by tea.blinkenlights.nl (Postfix) with ESMTP id 14EC5192; Fri, 19 Nov 2004 10:32:46 +0100 (CET) Date: Fri, 19 Nov 2004 10:32:46 +0100 (CET) From: Sten Spans To: John Baldwin In-Reply-To: Message-ID: References: <200411151620.37816.jhb@FreeBSD.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed cc: Robert Watson cc: freebsd-alpha@FreeBSD.org Subject: Re: alpha and em mtu X-BeenThere: freebsd-alpha@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Porting FreeBSD to the Alpha List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Nov 2004 09:32:48 -0000 On Mon, 15 Nov 2004, Sten Spans wrote: > On Mon, 15 Nov 2004, John Baldwin wrote: > >> On Monday 15 November 2004 04:07 pm, Sten Spans wrote: >>> On Mon, 15 Nov 2004, John Baldwin wrote: >>> >>> changed to ((off0 & 0x3) != 0), didn't seem to print anything. >> >> Ok, try this one then instead: >> >> Index: netinet/tcp_input.c >> =================================================================== >> RCS file: /usr/cvs/src/sys/netinet/tcp_input.c,v >> retrieving revision 1.255 >> diff -u -r1.255 tcp_input.c >> --- netinet/tcp_input.c 7 Nov 2004 19:19:35 -0000 1.255 >> +++ netinet/tcp_input.c 15 Nov 2004 21:19:50 -0000 >> @@ -504,6 +504,8 @@ >> } >> } >> ip = mtod(m, struct ip *); >> + if (((uintptr_t)ip & 0x3) != 0) >> + printf("%s: ip %p is misaligned\n", __func__, ip); >> ipov = (struct ipovly *)ip; >> th = (struct tcphdr *)((caddr_t)ip + off0); >> tlen = ip->ip_len; >> > > This does print something: > deepthought# ifconfig em0 mtu 1501 > deepthought# tcp_input: ip 0xfffffc001817f00e is misaligned > > fatal kernel trap: > > trap entry = 0x4 (unaligned access fault) > faulting va = 0xfffffc001817f02e > opcode = 0x28 > register = 0x1 > pc = 0xfffffc00004cd134 > ra = 0xfffffc00004ccf94 > sp = 0xfffffe00187a9af0 > curthread = 0xfffffc001f3a70e0 > pid = 14, comm = swi1: net > > [thread 100006] > Stopped at tcp_input+0x3a4: srl t0,#0x2,t0 > > > The ip's used are 192.168.1.3 and 192.168.1.4. Any luck or should I turn this into a pr ? -- Sten Spans "There is a crack in everything, that's how the light gets in." Leonard Cohen - Anthem