Date: Sat, 29 Aug 1998 12:01:24 +0000 From: Niall Smart <rotel@indigo.ie> To: Mike Smith <mike@smith.net.au>, Alexander Litvin <archer@lucky.net> Cc: current@FreeBSD.ORG Subject: Re: encountered possible VM bug ? Message-ID: <199808291101.MAA00638@indigo.ie> In-Reply-To: <199808290127.BAA02277@word.smith.net.au>; Mike Smith <mike@smith.net.au>
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On Aug 29, 1:27am, Mike Smith wrote: } Subject: Re: encountered possible VM bug ? > > 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. > > 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. It might be finding a 0x0 where it thinks the saved eip is (usually ebp + 4) Try "x (ebp + 4)". Niall -- Niall Smart, rotel@indigo.ie. Amaze your friends and annoy your enemies: echo '#define if(x) if (!(x))' >> /usr/include/stdio.h To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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