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VMA section overlap warnings for overlays

Alan Modra amodra@gmail.com
Fri Jul 16 10:04:00 GMT 2010 
On Fri, Jul 16, 2010 at 09:39:16AM +0200, Andreas Schwab wrote:
> "H.J. Lu" <hjl.tools@gmail.com> writes:
> 
> > Why does an empty section affect section layout?
> 
> ??? That's the bug.

I think we could probably remove all the sh_size != 0 tests associated
with ELF_SECTION_IN_SEGMENT in elf.c.  I'm not sure why they were
there in the first place, possibly to cover bugs in the precursors to
ELF_SECTION_IN_SEGMENT.

If we do that, then any zero size load/alloc sections will be added to
a segment map by copy_elf_program_header for objcopy and strip, just
as they are for ld.  Then the zero size sections will be handled by
assign_file_positions_for_load_sections and placed with other load
sections, rather than being shunted off to
assign_file_positions_for_non_load_sections.

-- 
Alan Modra
Australia Development Lab, IBM
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