VMA section overlap warnings for overlays

[H.J. Lu]

On Tue, Jul 20, 2010 at 7:10 AM, Alan Modra <amodra@gmail.com> wrote:
> This removes all the special treatment for zero size sections when
> using ELF_SECTION_IN_SEGMENT in elf.c, and makes readelf display
> section to segment mapping for zero size sections.  I chose to not
> include a zero size section in readelf's mapping if the section was at
> the end of a segment.  eg. if the segment covers 0x1000 to 0x1fff,
> then a zero sized section located at 0x2000 is not shown as part of
> the segment.  That seems reasonable to me, but I'm open to
> suggestions.  I'll note that omitting sections like this in elf.c, ie.
> using ELF_SECTION_IN_SEGMENT_STRICT there, causes testsuite failures
> on x86.  A zero length .got.plt sometimes ends up as the last section
> mapped to a load segment.
>
> include/elf/
>        * internal.h (ELF_TBSS_SPECIAL): New macro, extracted from..
>        (ELF_SECTION_SIZE): ..here.
>        (ELF_SECTION_IN_SEGMENT_1): Add "strict" arg.
>        (ELF_SECTION_IN_SEGMENT_STRICT): New macro.
> bfd/
>        * elf.c (assign_file_positions_for_load_sections): Check that
>        zero size sections are allocated in segments too.
>        (assign_file_positions_for_non_load_sections): Warn if zero
>        size alloc sections are found here.
>        (copy_elf_program_header): Don't drop zero size sections from
>        segment map.
>        (copy_private_bfd_data): Check for changes in zero size sections.
> binutils/
>        * readelf.c (process_program_headers): Don't ignore all zero size
>        sections.
> ld/testsuite/
>        * ld-powerpc/tlsexe.r: Update.
>        * ld-powerpc/tlsexetoc.r: Update.
>        * ld-powerpc/tlsso.r: Update.
>        * ld-powerpc/tlstocso.r: Update.
>

This may have caused:

http://sourceware.org/bugzilla/show_bug.cgi?id=12516

-- 
H.J.