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Date:      Sat, 29 Aug 1998 01:27:38 +0000
From:      Mike Smith <mike@smith.net.au>
To:        Alexander Litvin <archer@lucky.net>
Cc:        Mike Smith <mike@smith.net.au>, current@FreeBSD.ORG
Subject:   Re: encountered possible VM bug ? 
Message-ID:  <199808290127.BAA02277@word.smith.net.au>
In-Reply-To: Your message of "Fri, 28 Aug 1998 12:24:31 %2B0300." <19980828122431.14123@carrier.kiev.ua> 

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> On Fri, Aug 28, 1998 at 01:19:08AM +0000, Mike Smith wrote:
> > > Reading symbols from /usr/libexec/ld.so...done.
> > > Reading symbols from /usr/lib/aout/libc.so.3.1...done.
> > > 
> > > Error accessing memory address 0x0: Bad address.
> > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > > What exactly does that line mean? When I attach to not deseased dummy_daemon,
> > > it does not appear, instead I see:
> > 
> > It means that the instruction pointer obtained for the process is 0, 
> > which is invalid.
> 
> Do you mean eip register? 'info registers' show:

I was wrong; it means that at some point gdb has attempted to read from 
address 0, which is invalid, and it can't proceed.  You would have to 
manually examine the core file to work out what's going on; I would 
guess that it's damaged somewhere.

-- 
\\  Sometimes you're ahead,       \\  Mike Smith
\\  sometimes you're behind.      \\  mike@smith.net.au
\\  The race is long, and in the  \\  msmith@freebsd.org
\\  end it's only with yourself.  \\  msmith@cdrom.com



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