From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1208 invoked by alias); 8 Jan 2002 23:15:31 -0000 Mailing-List: contact gdb-patches-help@sources.redhat.com; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sources.redhat.com Received: (qmail 923 invoked by uid 22784); 8 Jan 2002 23:15:26 -0000 From: Michael Snyder Newsgroups: cygnus.patches.gdb Subject: Re: [RFA] Find and read symbol files after attach (linux) Date: Tue, 08 Jan 2002 15:15:00 -0000 Organization: Red Hat, Inc. Message-ID: <3C3B6E7F.FFFF6E59@redhat.com> References: <200201080040.g080e0h29987@reddwarf.cygnus.com> <20020107215957.A9170@nevyn.them.org> <3C3B332E.774C4E2E@redhat.com> <20020108133130.A27580@nevyn.them.org> NNTP-Posting-Host: reddwarf.cygnus.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: cronkite.cygnus.com 1010528171 16181 205.180.231.12 (8 Jan 2002 22:16:11 GMT) X-Complaints-To: postmaster@cygnus.com NNTP-Posting-Date: 8 Jan 2002 22:16:11 GMT X-Mailer: Mozilla 4.76 [en] (X11; U; Linux 2.4.2-2smp i686) X-Accept-Language: en To: gdb-patches@sources.redhat.com DJ-Gateway: from newsgroup cygnus.patches.gdb X-SW-Source: 2002-01/txt/msg00146.txt.bz2 Daniel Jacobowitz wrote: > > On Tue, Jan 08, 2002 at 09:58:06AM -0800, Michael Snyder wrote: > > Daniel Jacobowitz wrote: > > > > > > On Mon, Jan 07, 2002 at 04:40:00PM -0800, Michael Snyder wrote: > > > > [oops, hit send too soon...] > > > > This change allows GDB to find and read the symbol files (including > > > > all shared libraries) on Linux when you attach to an anonymous PID. > > > > It should work for all Linuxen, but for now I've only added it to the > > > > linux.mh and nm-linux.h files in config/i386. Please feel free to > > > > add it to your targets. > > > > > > [without actually looking at it...] > > > > > > (A) Is there any reason not to do it for all Linuxen in > > > config/nm-linux.h? > > > > Probably can. I was being conservative. > > I'd prefer you to do this, then. I believe it will work. > > > > (B) Why do we need /proc to do this? We should be able to use the > > > information in the link map - which we already access in solib-svr4.h - > > > to get all of this. > > > > There may be another method of doing it -- I just used the > > method I know (copied from Solaris). We need to discover > > the mapped memory regions so you can find the "debug_base". > > But this isn't one of my strong areas, so you may well know > > a better way to do the same thing. > > Well, Mark's comment is completely correct. Eventually I remembered > that this works by looking up data at _DYNAMIC, which means we need the > executable first :) > > I believe that we should be able to find the rest of what we need by > the shared library code, without the mappings file, though. I also > thought that this would just 'work'. Have you tried with the code to > find the executable but without the code to find shared libraries? > What happens? Oops, I answered "yes, it works", but my email is out to lunch. Yes, it works. Submitted separately, approved, and checked in.