From owner-freebsd-current Fri Aug 28 02:50:33 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id CAA26066 for freebsd-current-outgoing; Fri, 28 Aug 1998 02:50:33 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from burka.carrier.kiev.ua (burka.carrier.kiev.ua [193.193.193.107]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id CAA26058 for ; Fri, 28 Aug 1998 02:50:29 -0700 (PDT) (envelope-from archer@grape.carrier.kiev.ua) Received: from kozlik.carrier.kiev.ua (kozlik.carrier.kiev.ua [193.193.193.111]) by burka.carrier.kiev.ua (8.9.0/8.Who.Cares) with ESMTP id MAA03552; Fri, 28 Aug 1998 12:49:27 +0300 (EEST) Received: (from uucp@localhost) by kozlik.carrier.kiev.ua (8.9.0/8.9.0/8.Who.Cares) with UUCP id MAA05118; Fri, 28 Aug 1998 12:42:11 +0300 (EEST) Received: (from archer@localhost) by grape.carrier.kiev.ua (8.9.1/8.8.8) id MAA01591; Fri, 28 Aug 1998 12:24:31 +0300 (EEST) (envelope-from archer) Message-ID: <19980828122431.14123@carrier.kiev.ua> Date: Fri, 28 Aug 1998 12:24:31 +0300 From: Alexander Litvin To: Mike Smith Cc: current@FreeBSD.ORG Subject: Re: encountered possible VM bug ? References: <199808280808.LAA00123@grape.carrier.kiev.ua> <199808280119.BAA03086@word.smith.net.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.88e In-Reply-To: <199808280119.BAA03086@word.smith.net.au>; from Mike Smith on Fri, Aug 28, 1998 at 01:19:08AM +0000 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG 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: eax 0xf0 240 ecx 0x4 4 edx 0x1 1 ebx 0x20084060 537411680 esp 0xefbfdbd0 0xefbfdbd0 ebp 0xefbfdbf4 0xefbfdbf4 esi 0x3c 60 edi 0x0 0 eip 0x20057c21 0x20057c21 eflags 0x282 642 cs 0x1f 31 ss 0x27 39 ds 0x27 39 es 0x27 39 fs 0x27 39 gs 0x27 39 That is, eip is pinting to the same address 0x20057c21, as it is for 'healthy' copy of the program. The code under 0x20057c21 seems to be in place. > -- > \\ 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 > --- Happiness, n.: An agreeable sensation arising from contemplating the misery of another. -- Ambrose Bierce, "The Devil's Dictionary" To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message