ELF. Based on patches by Eric Youngdale <ericy@cais.cais.com>.
* libelf.h (struct elf_link_hash_entry): Remove copy_offset field.
Add got_offset and plt_offset fields.
(ELF_LINK_HASH_REF_DYNAMIC_MULTIPLE): Don't define.
(ELF_LINK_HASH_DEF_DYNAMIC_MULTIPLE): Don't define.
(ELF_LINK_HASH_NEEDS_COPY): Define.
(struct elf_backend_data): Add check_relocs field.
(struct bfd_elf_section_data): Change relocs from PTR to
Elf_Internal_Rela *.
(struct elf_obj_tdata): Add local_got_offsets field.
(elf_local_got_offsets): Define accessor macro.
(bfd_elf32_link_create_dynamic_sections): Declare.
(bfd_elf32_link_record_dynamic_symbol): Declare.
(bfd_elf64_link_create_dynamic_sections): Declare.
(bfd_elf64_link_record_dynamic_symbol): Declare.
* elfcode.h (elf_slurp_reloc_table): Don't use the section data
relocs field.
(elf_link_record_dynamic_symbol): Make globally visible. Use
macro to rename to NAME(bfd_elf,link_record_dynamic_symbol).
(elf_link_add_object_symbols): If creating a shared library, put
make all local symbols dynamic. Don't bother with the
DYNAMIC_MULTIPLE flags. Call the check_relocs backend function if
it is defined.
(elf_link_create_dynamic_sections): Make globally visible. Use
macro to rename to NAME(bfd_elf,link_create_dynamic_sections). If
creating a shared library, make sure that _DYNAMIC is added as a
dynamic symbol.
(elf_link_read_relocs): New function.
(NAME(bfd_elf,record_link_assignment)): If creating a shared
library, always create symbols, and always make them dynamic.
(elf_bfd_final_link): Permit creation of shared libraries.
(elf_link_input_bfd): Use elf_link_read_relocs to get the relocs.
* elf.c (_bfd_elf_link_hash_newfunc): Don't initialize
copy_offset. Initialize got_offset and plt_offset.
* elf32-target.h (elf_backend_check_relocs): Define as 0 if not
defined.
(elf32_bed): Initialize check_relocs field.
* elf64-target.h (elf_backend_check_relocs): Define as 0 if not
defined.
(elf64_bed): Initialize check_relocs field.
* elf32-i386.c (elf_howto_table): Change R_386_PLT32 and
R_386_GOTPC to be pc_relative and pcrel_offset.
(elf_i386_pic_plt0_entry): Define.
(elf_i386_pic_plt_entry): Define.
(elf_i386_create_dynamic_sections): Create a .got.plt section, and
define _GLOBAL_OFFSET_TABLE_ at the start of it. If creating a
shared library, make sure that _GLOBAL_OFFSET_TABLE_ is added as a
dynamic symbol. Don't create .rel.bss if creating a shared
library.
(elf_i386_check_relocs): New function.
(elf_i386_adjust_dynamic_symbol): Don't make a PLT entry if the
symbol already has one. When making a PLT entry, set plt_offset.
Don't create a copy reloc when creating a shared library. Don't
set copy_offset, just set ELF_LINK_HASH_NEEDS_COPY.
(elf_i386_allocate_dynamic_section): Remove.
(elf_i386_size_dynamic_sections): Look through all the sections
rather than assuming we know their names. Remove any empty reloc
or plt sections. Only add a DT_DEBUG entry if not creating a
shared library. Only add a DT_PLTGOT entry if there is a PLT.
Add a DT_TEXTREL entry if required.
(elf_i386_relocate_section): Permit undefined symbols when
creating a shared library. Handle the special relocation types
specially.
(elf_i386_finish_dynamic_symbol): Create a PLT entry if plt_offset
is set. If creating a shared library, produce a PIC PLT entry.
Only mark a PLT symbol as undefined if it was not defined by a
regular object file. Create a GOT entry if got_offset is set.
Create a copy reloc if ELF_LINK_HASH_NEEDS_COPY is set.
(elf_i386_finish_dynamic_sections): Change the handling of
DT_RELSZ to simply subtract out the size of .rel.plt. If creating
a shared library, produce PIC PLT code.
(elf_backend_check_relocs): Define.
* elf32-sparc.c (elf_sparc_howto_table): Change R_SPARC_GOT10,
R_SPARC_GOT22, and R_SPARC_PC10 to not warn about reloc overflow.
(elf32_sparc_create_dynamic_sections): If creating a shared
library, make sure that _GLOBAL_OFFSET_TABLE_ is added as a
dynamic symbol, and set the type to STT_OBJECT. Likewise for
_PROCEDURE_LINKAGE_TABLE_. Don't create .rel.bss if creating a
shared library.
(elf32_sparc_check_relocs): New function.
(elf32_sparc_adjust_dynamic_symbol): Don't make a PLT entry if the
symbol already has one. When making a PLT entry, set plt_offset.
Don't create a copy reloc when creating a shared library. Don't
set copy_offset, just set ELF_LINK_HASH_NEEDS_COPY.
(elf32_sparc_allocate_dynamic_section): Remove.
(elf32_sparc_size_dynamic_sections): Look through all the sections
rather than assuming we know their names. Only add a DT_DEBUG
entry if not creating a shared library. Add a DT_TEXTREL entry if
required.
(elf32_sparc_relocate_section): Permit undefined symbols when
creating a shared library. Handle the special relocation types
specially.
(elf32_sparc_finish_dynamic_symbol): Create a PLT entry if plt_offset
is set. Only mark a PLT symbol as undefined if it was not defined
by a regular object file. Create a GOT entry if got_offset is
set. Create a copy reloc if ELF_LINK_HASH_NEEDS_COPY is set.
(elf32_sparc_finish_dynamic_sections): Store dynobj in a local
variable.
(elf_backend_check_relocs): Define.
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