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Date:      Tue, 17 Feb 1998 12:29:04 +0100
From:      Eivind Eklund <eivind@yes.no>
To:        Mike Smith <mike@smith.net.au>
Cc:        hackers@FreeBSD.ORG
Subject:   Re: ed overwrite clue?
Message-ID:  <19980217122904.27594@follo.net>
In-Reply-To: <199802171110.DAA01377@dingo.cdrom.com>; from Mike Smith on Tue, Feb 17, 1998 at 03:10:43AM -0800
References:  <19980217114623.18048@follo.net> <199802171110.DAA01377@dingo.cdrom.com>

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On Tue, Feb 17, 1998 at 03:10:43AM -0800, Mike Smith wrote:
> > This might be a clue for the strange ED overwrites (or it might be
> > something completely unrelated :-)
> 
> It looks kinda interesting, at any rate:

[code snippet deleted]
> 
> Weird.  The destination should be on the stack - are you comfortable 
> that you haven't overrun the end of the stack?

I'm not certain about anything right now - I started reproducing this
about an hour ago.  It might even be a hardware failure (but I've
tried with different cards of the same type, and all fail, while a
Kingston Ne2000-clone works flawlessly).

> > #4  0xf01b34ae in ed_pio_readmem (sc=0xf01ed400, src=25088, 
> >     dst=0xefbfffc0 "'", amount=4) at machine/cpufunc.h:185
> 
> In my copy of cpufunc.h, line 185 is insb().  Is this an 8-bit card?

It's a "Thrust" NE2000-clone, based on the RTL8019AS.

And in the relevant header file here line 185 is insw().

Eivind, going back to debugging.

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