Date: Wed, 15 May 2002 23:40:48 -0400 (EDT) From: John Baldwin <jhb@FreeBSD.org> To: Kris Kennaway <kris@obsecurity.org> Cc: alpha@FreeBSD.ORG, Andrew Gallatin <gallatin@cs.duke.edu> Subject: Re: memory management fault during netbooting on 4.6-PRERELEASE Message-ID: <XFMail.20020515234048.jhb@FreeBSD.org> In-Reply-To: <20020515194814.A98844@xor.obsecurity.org>
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On 16-May-2002 Kris Kennaway wrote: > On Wed, May 15, 2002 at 08:09:12PM -0400, Andrew Gallatin wrote: >> >> Kris Kennaway writes: >> > On Wed, May 15, 2002 at 09:32:41AM -0400, Andrew Gallatin wrote: >> > > >> > > Kris Kennaway writes: >> > > > I'm seeing the following on the alpha package cluster when trying to >> > > > netboot a 4.6-PRERELEASE kernel: >> > > >> > > <...> >> > > >> > > > pc = 0x0 >> > > > ra = 0xfffffc000056bcc0 >> > > >> > > Something followed a null function pointer. >> > > >> > > Can you run gdb on the corresponding kernel.debug & see what >> > > 'list *0xfffffc000056bcc0' shows for the caller? >> > >> > Unfortunately I'm not getting a crashdump because it's happening >> > during the boot process. >> >> We're just using gdb to translate that address to a line number, so >> you don't need a crashdump; just do what I asked. Here's an example: > > The reason I thought I needed a crashdump is because when I do that > command I get this: > > axp0# gdb kernel.debug > GNU gdb 4.18 > Copyright 1998 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you are > welcome to change it and/or distribute copies of it under certain conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for details. > This GDB was configured as "alpha-unknown-freebsd"... > (gdb) l *0xfffffc000056bcc0 > No source file for address 0xfffffc000056bcc0. Ok, can you do a nm kernel.debug | sort | less and find the two symbols that that address falls between? > Kris -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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