From owner-freebsd-current  Sat Oct 10 23:11:41 1998
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To: Manfred Antar <mantar@netcom.com>
cc: current@FreeBSD.ORG
Subject: Re: Version 1.56 of if_fxp.c causes fatal trap 12 
In-reply-to: Your message of "Sat, 10 Oct 1998 22:25:59 PDT."
             <4.1.19981010213916.00a48a70@192.168.0.1> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Sat, 10 Oct 1998 23:10:14 -0700
Sender: owner-freebsd-current@FreeBSD.ORG
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X-Loop: FreeBSD.ORG

>With a very current elf kernel (SMP) built with version 1.56 if_fxp.c
>causes the break to debugger right when doing the ifconfig part of rc.conf.
>with an aout (SMP) kernel there is no problem.
>with an elf (No SMP) there is no problem
> 
>The instruction pointer is 0x8:0xf015b820
>current process = 62 (ifconfig)
>Stopped at m_freem+0x1c: movswl 0x10(%esi),%eax
>closest I can get with nm is f015b804 T m_freem
>
>With version 1.55 there is no problems with any of the above configurations
>The motherboard is an Intel PR440FX with 2 200mhz-ppro and built in eithernet

   Please apply the attached patch and let me know if it fixes the problem
for you. Thanks.

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project

Index: if_fxp.c
===================================================================
RCS file: /home/ncvs/src/sys/pci/if_fxp.c,v
retrieving revision 1.55
diff -c -r1.55 if_fxp.c
*** if_fxp.c	1998/08/04 08:53:12	1.55
--- if_fxp.c	1998/10/11 06:08:30
***************
*** 641,646 ****
--- 641,647 ----
  	    M_DEVBUF, M_NOWAIT);
  	if (sc->cbl_base == NULL)
  		goto fail;
+ 	bzero(sc->cbl_base, sizeof(struct fxp_cb_tx) * FXP_NTXCB);
  
  	sc->fxp_stats = malloc(sizeof(struct fxp_stats), M_DEVBUF, M_NOWAIT);
  	if (sc->fxp_stats == NULL)

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