Date: Wed, 15 May 2002 23:55:35 -0400 (EDT) From: John Baldwin <jhb@FreeBSD.org> To: Kris Kennaway <kris@obsecurity.org> Cc: Andrew Gallatin <gallatin@cs.duke.edu>, alpha@FreeBSD.org Subject: Re: memory management fault during netbooting on 4.6-PRERELEASE Message-ID: <XFMail.20020515235535.jhb@FreeBSD.org> In-Reply-To: <20020515204816.B302@xor.obsecurity.org>
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On 16-May-2002 Kris Kennaway wrote: > On Wed, May 15, 2002 at 11:40:48PM -0400, John Baldwin wrote: > >> > (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? > > fffffc000056bca0 t swi_net > fffffc000056bd20 T do_sir Ok, swi_net() looks like so (alpha/alpha/iplfuncs.c) static void swi_net() { u_int32_t bits = atomic_readandclear(&netisr); int i; for (i = 0; i < 32; i++) { if (bits & 1) netisrs[i](); bits >>= 1; } } My guess then is that we tried to execute a netisr() that was NULL. Is this reproducible? If so, you could try adding a a hack to not execute the isr if it's null, i.e.: if ((bits & 1) != 0 && netisrs[i] != NULL) netisrs[i](); > 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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