From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 30 Jul 1999 02:03:24 -0400 From: Daniel Jacobowitz To: Paul.Mackerras@cs.anu.edu.au Cc: linuxppc-dev@lists.linuxppc.org Subject: Re: Vger broken w.r.t. gdb Message-ID: <19990730020323.A798@them.org> References: <19990728222617.A636@them.org> <199907290400.OAA02618@tango.anu.edu.au> <19990729013842.A1209@them.org> <199907290548.PAA02760@tango.anu.edu.au> <19990730011819.A364@them.org> <199907300524.PAA03967@tango.anu.edu.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <199907300524.PAA03967@tango.anu.edu.au>; from Paul Mackerras on Fri, Jul 30, 1999 at 03:24:26PM +1000 Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On Fri, Jul 30, 1999 at 03:24:26PM +1000, Paul Mackerras wrote: > Daniel Jacobowitz wrote: > > > Now I'm really confused. > > > > >From my readings it appears that we should only reach this point if a > > trap instruction was encountered. But from what I can see no trap > > instruction exists at that address. At > > A common thing that gdb does is to put trap instructions into the > memory image of a process being debugged. It sounds to me as though, > with all the page cache and memory management changes that have gone > on in 2.3, we now have the undesirable situation that a trap > instruction put in by gdb hasn't stayed confined to the process being > debugged but has leaked into the copy of the page that is being used > by other processes. That makes sense, but wouldn't it have shown up in the core dump if that were the case? Dan /--------------------------------\ /--------------------------------\ | Daniel Jacobowitz |__| SCS Class of 2002 | | Debian GNU/Linux Developer __ Carnegie Mellon University | | dan@debian.org | | dmj+@andrew.cmu.edu | \--------------------------------/ \--------------------------------/ [[ This message was sent via the linuxppc-dev mailing list. Replies are ]] [[ not forced back to the list, so be sure to Cc linuxppc-dev if your ]] [[ reply is of general interest. Please check http://lists.linuxppc.org/ ]] [[ and http://www.linuxppc.org/ for useful information before posting. ]]