Re: [PATCH] Objective-C language support.

[Adam Fedor <fedor at doc dot com>]

Nobody I know can figure out what this does, so for now I'll just drop 
it and see if something goes wrong...

Jim Blandy wrote:
> Can we have a more extensive comment here?  What are symbols that
> begin with ".objc_"?  Why should we ignore them?  Where can we find
> more complete documentation for what they mean?  (Is there any
> document that describes how Objective C programs are represented at
> the assembly/linkage level?)
>
> Michael Snyder <msnyder@redhat.com> writes:
>
>
> > Adam Fedor wrote:
> >
> > > This patch adds Objective-C language support to gdb based upon a patch
> > > provided by Apple Computer Inc from their version of gdb. Note that the
> > > patch only contains changes to existing files. New files (objc-lang.h,
> > > objc-lang.c, objc-exp.y) and a gdb.objc testsuite directory are located at
> > >
> > > ftp://ftp.gnustep.org/pub/gnustep/contrib/gdb-objc-patch.tar.gz
> > Jim, could you take a quick look at this small change?
> > [Adam, the comment needs a period followed by two spaces.]  
> >
> >
> > >        * elfread.c (elf_symtab_read): Skip ObjC symbols.
> > > Index: gdb/elfread.c
> > > ===================================================================
> > > RCS file: /cvs/src/src/gdb/elfread.c,v
> > > retrieving revision 1.23
> > > diff -u -p -r1.23 elfread.c
> > > --- gdb/elfread.c       24 Jul 2002 23:51:35 -0000      1.23
> > > +++ gdb/elfread.c       17 Sep 2002 19:29:59 -0000
> > > @@ -349,7 +349,12 @@ elf_symtab_read (struct objfile *objfile
> > >                }
> > >              else if (sym->section->flags & SEC_CODE)
> > >                {
> > > -                 if (sym->flags & BSF_GLOBAL)
> > > +                 if (sym->name[0] == '.' && (strncmp (sym->name + 1, "objc_", 4) == 0))
> > > +                   {
> > > +                     /* Looks like an Objective-C special symbol */
> > > +                     continue;
> > > +                   }
> > > +                 else if (sym->flags & BSF_GLOBAL)
> > >                    {
> > >                      ms_type = mst_text;
> > >                    }


--
Adam Fedor, Digital Optics Corp.      | I'm glad I hate spinach, because
http://www.doc.com                    | if I didn't, I'd eat it, and you
                                      | know how I hate the stuff.