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--- binutils.orig/binutils/objcopy.c 2018-08-06 09:11:02.053503486 +0100
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+++ binutils-2.30/binutils/objcopy.c 2018-08-06 09:11:23.296329566 +0100
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@@ -2174,7 +2174,7 @@ merge_gnu_build_notes (bfd * abfd, asect
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3. Eliminate any NT_GNU_BUILD_ATTRIBUTE_OPEN notes that have the same
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full name field as the immediately preceeding note with the same type
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of name and whose address ranges coincide.
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- IE - it there are gaps in the coverage of the notes, then these gaps
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+ IE - if there are gaps in the coverage of the notes, then these gaps
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must be preserved.
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4. Combine the numeric value of any NT_GNU_BUILD_ATTRIBUTE_OPEN notes
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of type GNU_BUILD_ATTRIBUTE_STACK_SIZE.
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@@ -2182,16 +2182,47 @@ merge_gnu_build_notes (bfd * abfd, asect
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its description field is empty then the nearest preceeding OPEN note
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with a non-empty description field must also be preserved *OR* the
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description field of the note must be changed to contain the starting
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- address to which it refers. */
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+ address to which it refers.
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+ 6. Notes with the same start and end address can be deleted. */
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for (pnote = pnotes + 1; pnote < pnotes_end; pnote ++)
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{
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int note_type;
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objcopy_internal_note * back;
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objcopy_internal_note * prev_open_with_range = NULL;
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+ /* Rule 6 - delete 0-range notes. */
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+ if (pnote->start == pnote->end)
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+ {
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+ duplicate_found = TRUE;
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+ pnote->note.type = 0;
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+ continue;
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+ }
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+
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/* Rule 2 - preserve function notes. */
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if (! is_open_note (pnote))
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- continue;
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+ {
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+ int iter;
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+
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+ /* Check to see if there is an identical previous function note.
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+ This can happen with overlays for example. */
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+ for (iter = 0, back = pnote -1; back >= pnotes; back --)
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+ {
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+ if (back->start == pnote->start
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+ && back->end == pnote->end
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+ && back->note.namesz == pnote->note.namesz
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+ && memcmp (back->note.namedata, pnote->note.namedata, pnote->note.namesz) == 0)
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+ {
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+ duplicate_found = TRUE;
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+ pnote->note.type = 0;
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+ break;
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+ }
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+
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+ /* Don't scan too far back however. */
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+ if (iter ++ > 16)
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+ break;
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+ }
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+ continue;
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+ }
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note_type = pnote->note.namedata[attribute_type_byte];
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