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Port the bug fix for PR 19704 (Missing dynamic relocation against undefined weak symbol) to the SPARC architecture.

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* elf32-sparc.c (elf_backend_fixup_symbol): New.
        * elf64-sparc.c (elf_backend_fixup_symbol): New.
        * elfxx-sparc.c (UNDEFINED_WEAK_RESOLVED_TO_ZERO): New.
        (_bfd_sparc_elf_link_hash_entry): Add has_got_reloc and
        has_non_got_reloc.
        (link_hash_newfunc): Initialize has_got_reloc and
	has_non_got_reloc.
        (_bfd_sparc_elf_size_dynamic_sections): Set interp to .interp
        section.
        (_bfd_sparc_elf_copy_indirect_symbol): Copy has_got_reloc and
        has_non_got_reloc.
        (_bfd_sparc_elf_check_relocs): Set has_got_reloc and
        has_non_got_reloc.
        (_bfd_sparc_elf_fixup_symbol): New function.
        (allocate_dynrelocs): Don't allocate space for dynamic
        relocations and discard relocations against resolved undefined
        weak symbols in executable.  Don't make resolved undefined weak
        symbols in executable dynamic.  Keep dynamic non-GOT/non-PLT
        relocation against undefined weak symbols in PIE.
        (_bfd_sparc_elf_relocate_section): Don't generate dynamic
        relocations against resolved undefined weak symbols in PIE
        (_bfd_sparc_elf_finish_dynamic_symbol): Keep PLT/GOT entries
        without ynamic PLT/GOT relocations for resolved undefined weak
        symbols.
        Don't generate dynamic relocation against resolved undefined
        weak symbol in executable.
        (pie_finish_undefweak_symbol): New function.
        (_bfd_sparc_elf_finish_dynamic_sections): Call
        pie_finish_undefweak_symbol on all symbols in PIE.
        * elfxx-sparc.h (_bfd_sparc_elf_link_hash_table): Add interp.
        (_bfd_sparc_elf_fixup_symbol): New function.
This commit is contained in:
Qing Zhao
2017-04-10 12:46:30 +01:00
committed by Nick Clifton
parent d236cfd444
commit bb1dd176fb
5 changed files with 228 additions and 28 deletions
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bfd/elf32-sparc.c
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@@ -238,6 +238,7 @@ elf32_sparc_add_symbol_hook (bfd * abfd,
#define elf_backend_gc_sweep_hook _bfd_sparc_elf_gc_sweep_hook
#define elf_backend_plt_sym_val _bfd_sparc_elf_plt_sym_val
#define elf_backend_init_index_section _bfd_elf_init_1_index_section
#define elf_backend_fixup_symbol _bfd_sparc_elf_fixup_symbol
#define elf_backend_can_gc_sections 1
#define elf_backend_can_refcount 1