Rewrite/fix cygwin1.dbg generation

[Pedro Alves]

Corinna Vinschen wrote:
> On Nov  4 04:00, Pedro Alves wrote:
> >
> > Ah, got it.  VirtualAlloc fails on the first _csbrk, since it
> > is tripping on the VMA of .gnu_debuglink ...  I assumed it would
> > not be a problem, since it isn't ALLOCced, but oh well...
> > I tried adding an EXCLUDE/NOLOAD flag to .gnu_debuglink, but no
> > can do.
>
> That was the reason for creating the .dbg file in the first place,
> wasn't it?  The Windows loader appears to allocate the full size of all
> sections of the image, including the NOLOAD and DEBUG sections.  Sort of
> counterproductive but there seem to be no way around it.
>

It occurred me that the problem may be that
ld is accounting for the virtual address and virtual size of the last section
to write the SizeOfImage field in the PE headers, in
bfd/peXXigen.c:_bfd_XXi_swap_aouthdr_out.
We can change it to not include non ALLOC, DEBUG sections.

Anyone tried that already?

I'll see if I can give it a try tonight.

Cheers,
Pedro Alves