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Re: [RFC] Fix .text section offset for windows DLL (was Calling __stdcall functions in the inferior)


> Date: Mon, 15 Oct 2012 19:23:13 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: gdb-patches@sourceware.org
> 
> > From: "Pierre Muller" <pierre.muller@ics-cnrs.unistra.fr>
> > Date: Mon, 15 Oct 2012 15:35:55 +0200
> > 
> >   After some investigation, I noticed that
> > the minimal symbol GetLastError was offset by 0xf0000
> > respective to the  '_imp__GetLastError@0'.
> > 
> >   The patch attached allowed me to call
> > (gdb) call GetLastError ()
> > And get a simple 
> > $2 = 126
> > (for instance, depending on when you do the call).
> 
> Thanks.
> 
> >   Could someone please test the patch and 
> > confirm that it does fix the problem?
> 
> I will try that in a few days.

Sorry for the long delay.

I tried that now, but then I realized that the patch cannot be applied
to GDB 7.5, because it uses gdb_bfd.h stuff.  I tried to work around
that by replacing the call to gdb_bfd_open_maybe_remote by
bfd_open_maybe_remote; that compiled, but when I tried to use the
resulting binary, it crashed in the marked assertion:

  gdb.exe caused an Access Violation at location 00532b99 in module gdb.exe Reading from location 00000000.
  00532B99  gdb.exe:00532B99  gdb_bfd_unref  objfiles.c:1514

          ...
            /* Valid range for p_refcount: a pointer to int counter, which has a
               value of 1 (single owner) or 2 (shared).  */
  >         gdb_assert (*p_refcount == 1 || *p_refcount == 2);

            *p_refcount -= 1;
          ...

Is it possible to have a patch for GDB 7.5?

TIA


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