bfd/
2009-01-02 H.J. Lu <hongjiu.lu@intel.com> PR ld/9679 * elflink.c (elf_merge_st_other): New. (_bfd_elf_merge_symbol): Use it on skipped weak definitions and hide them if needed. (elf_link_add_object_symbols): Updated. ld/testsuite/ 2009-01-02 H.J. Lu <hongjiu.lu@intel.com> PR ld/9679 * ld-elf/pr9679-1.c: New. * ld-elf/pr9679-2.c: Likewise. * ld-elf/pr9679.rd: Likewise. * ld-elf/shared.exp (build_tests): Add test for libpr9679.so.
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H.J. Lu
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d88805311b
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54ac0771d7
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@ -1,3 +1,11 @@
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2009-01-02 H.J. Lu <hongjiu.lu@intel.com>
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PR ld/9679
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* elflink.c (elf_merge_st_other): New.
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(_bfd_elf_merge_symbol): Use it on skipped weak definitions and
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hide them if needed.
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(elf_link_add_object_symbols): Updated.
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2009-01-02 H.J. Lu <hongjiu.lu@intel.com>
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PR ld/9676
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103
bfd/elflink.c
103
bfd/elflink.c
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@ -822,6 +822,54 @@ _bfd_elf_link_renumber_dynsyms (bfd *output_bfd,
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return dynsymcount;
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}
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/* Merge st_other field. */
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static void
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elf_merge_st_other (bfd *abfd, struct elf_link_hash_entry *h,
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Elf_Internal_Sym *isym, bfd_boolean definition,
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bfd_boolean dynamic)
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{
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const struct elf_backend_data *bed = get_elf_backend_data (abfd);
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/* If st_other has a processor-specific meaning, specific
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code might be needed here. We never merge the visibility
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attribute with the one from a dynamic object. */
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if (bed->elf_backend_merge_symbol_attribute)
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(*bed->elf_backend_merge_symbol_attribute) (h, isym, definition,
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dynamic);
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/* If this symbol has default visibility and the user has requested
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we not re-export it, then mark it as hidden. */
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if (definition
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&& !dynamic
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&& (abfd->no_export
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|| (abfd->my_archive && abfd->my_archive->no_export))
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&& ELF_ST_VISIBILITY (isym->st_other) != STV_INTERNAL)
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isym->st_other = (STV_HIDDEN
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| (isym->st_other & ~ELF_ST_VISIBILITY (-1)));
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if (!dynamic && ELF_ST_VISIBILITY (isym->st_other) != 0)
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{
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unsigned char hvis, symvis, other, nvis;
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/* Only merge the visibility. Leave the remainder of the
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st_other field to elf_backend_merge_symbol_attribute. */
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other = h->other & ~ELF_ST_VISIBILITY (-1);
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/* Combine visibilities, using the most constraining one. */
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hvis = ELF_ST_VISIBILITY (h->other);
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symvis = ELF_ST_VISIBILITY (isym->st_other);
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if (! hvis)
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nvis = symvis;
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else if (! symvis)
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nvis = hvis;
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else
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nvis = hvis < symvis ? hvis : symvis;
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h->other = other | nvis;
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}
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}
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/* This function is called when we want to define a new symbol. It
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handles the various cases which arise when we find a definition in
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a dynamic object, or when there is already a definition in a
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@ -1347,7 +1395,22 @@ _bfd_elf_merge_symbol (bfd *abfd,
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/* Skip weak definitions of symbols that are already defined. */
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if (newdef && olddef && newweak)
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*skip = TRUE;
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{
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*skip = TRUE;
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/* Merge st_other. If the symbol already has a dynamic index,
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but visibility says it should not be visible, turn it into a
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local symbol. */
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elf_merge_st_other (abfd, h, sym, newdef, newdyn);
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if (h->dynindx != -1)
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switch (ELF_ST_VISIBILITY (h->other))
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{
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case STV_INTERNAL:
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case STV_HIDDEN:
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(*bed->elf_backend_hide_symbol) (info, h, TRUE);
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break;
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}
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}
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/* If the old symbol is from a dynamic object, and the new symbol is
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a definition which is not from a dynamic object, then the new
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@ -4244,42 +4307,8 @@ elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
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h->type = ELF_ST_TYPE (isym->st_info);
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}
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/* If st_other has a processor-specific meaning, specific
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code might be needed here. We never merge the visibility
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attribute with the one from a dynamic object. */
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if (bed->elf_backend_merge_symbol_attribute)
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(*bed->elf_backend_merge_symbol_attribute) (h, isym, definition,
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dynamic);
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/* If this symbol has default visibility and the user has requested
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we not re-export it, then mark it as hidden. */
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if (definition && !dynamic
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&& (abfd->no_export
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|| (abfd->my_archive && abfd->my_archive->no_export))
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&& ELF_ST_VISIBILITY (isym->st_other) != STV_INTERNAL)
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isym->st_other = (STV_HIDDEN
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| (isym->st_other & ~ELF_ST_VISIBILITY (-1)));
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if (ELF_ST_VISIBILITY (isym->st_other) != 0 && !dynamic)
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{
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unsigned char hvis, symvis, other, nvis;
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/* Only merge the visibility. Leave the remainder of the
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st_other field to elf_backend_merge_symbol_attribute. */
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other = h->other & ~ELF_ST_VISIBILITY (-1);
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/* Combine visibilities, using the most constraining one. */
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hvis = ELF_ST_VISIBILITY (h->other);
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symvis = ELF_ST_VISIBILITY (isym->st_other);
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if (! hvis)
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nvis = symvis;
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else if (! symvis)
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nvis = hvis;
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else
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nvis = hvis < symvis ? hvis : symvis;
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h->other = other | nvis;
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}
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/* Merge st_other field. */
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elf_merge_st_other (abfd, h, isym, definition, dynamic);
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/* Set a flag in the hash table entry indicating the type of
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reference or definition we just found. Keep a count of
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@ -1,3 +1,12 @@
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2009-01-02 H.J. Lu <hongjiu.lu@intel.com>
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PR ld/9679
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* ld-elf/pr9679-1.c: New.
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* ld-elf/pr9679-2.c: Likewise.
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* ld-elf/pr9679.rd: Likewise.
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* ld-elf/shared.exp (build_tests): Add test for libpr9679.so.
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2009-01-02 H.J. Lu <hongjiu.lu@intel.com>
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PR ld/9676
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@ -0,0 +1,5 @@
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int
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foo (void)
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{
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return 1;
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}
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@ -0,0 +1,13 @@
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extern int foo (void) __attribute__((weak,__visibility__ ("hidden")));
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int
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foo (void)
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{
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return 1;
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}
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int
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bar (void)
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{
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return foo ();
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}
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@ -0,0 +1,5 @@
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Symbol table '\.dynsym' contains [0-9]+ entries:
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+Num: +Value +Size Type +Bind +Vis +Ndx Name
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#...
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+[0-9]+: +[0-9a-f]+ +[0-9a-f]+ +FUNC +LOCAL +HIDDEN +[0-9]+ +foo
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#...
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@ -145,6 +145,9 @@ set build_tests {
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"-shared tmpdir/pr9676-4.o -Ltmpdir -lpr9676-3 -Wl,--start-group -lpr9676-1 -lpr9676-2 -Wl,--end-group"
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"-fPIC"
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{dummy.c} {{readelf {-s} pr9676.rd}} "libpr9676-4a.so"}
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{"Build libpr9679.so"
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"-shared" "-fPIC -O0"
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{pr9679-1.c pr9679-2.c} {{readelf {-s} pr9679.rd}} "libpr9679.so"}
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}
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set run_tests {
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