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Moved some mostly size-independent stuff from elfcode.h to elf.c, adding a data
structure to elfcode.h with some misc data and callback functions. Added a
pointer to that structure to the target back end data. More work can be done
here.
Renamed generic elf routines (not cpu-specific stuff) to start with bfd_elf or
_bfd_elf. Updated most call sites, sometimes defined some macros.
Moved some dynamic linking support code from m68k, sparc, i386 to common files,
using target back end flags to control behavior. More work can probably be
done here too.
Moved core- and linker-support code out of elfcode.h to elf.c, elfcore.h,
elflink.h, or elflink.c. Now elfcode.h contains only .o and executable
support, plus #includes of elfcore.h and elflink.h. Much of the contents of
these other header files can probably still be moved from the .h files to the
.c files, to get compiled only once.
Cleaned up some "gcc -Wall" warnings regarding unused or uninitialized
variables, in generic and cpu-specific code.
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argument.
* bfd-in.h (bfd_elf32_record_link_assignment): Update prototype.
(bfd_elf64_record_link_assignment): Likewise.
* bfd-in2.h: Rebuild.
PR 7164.
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saw_needed field.
* elfcode.h (elf_link_add_object_symbols): If elf_dt_needed_name
is an empty string, don't make a DT_NEEDED entry in the output
file. Record all DT_NEEDED entries found in input dynamic
objects.
(elf_link_output_extsym): Don't check saw_needed when issuing
warnings.
* elf.c (_bfd_elf_link_hash_table_init): Initialize needed, not
saw_needed.
(bfd_elf_get_needed_list): New function.
* bfd-in.h (struct bfd_elf_link_needed_list): Define.
(bfd_elf_get_needed_list): Define.
* bfd-in2.h: Rebuild.
PR 7083.
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(bfd_errmsgs): Add string for bfd_error_no_armap.
* bfd-in2.h: Rebuild.
* ecoff.c (ecoff_link_add_archive_symbols): If an archive has no
armap, set bfd_error_no_armap rather than bfd_error_no_symbols.
* elfcode.h (elf_link_add_archive_symbols): Likewise.
* linker.c (_bfd_generic_link_add_archive_symbols): Likewise.
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indirect symbols in weakdefs BFD_ASSERT.
* elf32-i386.c (elf_i386_adjust_dynamic_symbol): Simplify
BFD_ASSERT to permit some legal, but odd, cases.
* elf32-sparc.c (elf32_sparc_adjust_dynamic_symbol): Likewise.
* elf32-m68k.c (elf_m68k_adjust_dynamic_symbol): Likewise.
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SHT_NOBITS sections, in case a linker script is strange.
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sh_size.
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!SHT_NOBITS ones.
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symbol information structure. Don't bother to check for common
symbol size overflow.
(_bfd_generic_link_add_one_symbol): Likewise.
* aoutx.h (aout_link_check_ar_symbols): Likewise.
* linker.c (generic_link_check_archive_element): Adjust references
to common symbol information for new structure.
(_bfd_generic_link_add_one_symbol): Likewise.
* aoutx.h (aout_link_check_ar_symbols): Likewise.
(aout_link_add_symbols): Likewise.
* ecoff.c (ecoff_link_add_externals): Likewise.
* elfcode.h (elf_link_add_object_symbols): Likewise.
(elf_link_output_extsym): Likewise.
* sunos.c (sunos_add_one_symbol): Likewise.
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* elfcode.h (elf_link_add_object_symbols): Set saw_needed if
DT_NEEDED seen in .dynamic section.
(elf_link_output_extsym): Warn if an undefined symbol is
only referenced from a dynamic object, and not making a shared
object, and saw_needed is false.
* elf.c (_bfd_elf_link_hash_table_init): Initialize saw_needed.
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* elfcode.h (elf_link_add_object_symbols): Don't clear or set
ELF_LINK_HASH_DEFINED_WEAK.
(elf_link_output_extsym): Don't check ELF_LINK_HASH_DEFINED_WEAK.
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* linker.c (enum link_action): Add DEFW.
(link_action): Add bfd_link_hash_defweak column.
(_bfd_generic_link_add_one_symbol): Add DEFW case. Handle
bfd_link_hash_defweak in a few other cases.
* Many files (bfd_link_hash_undefweak): Renamed from
bfd_link_hash_weak.
* aoutx.h (aout_link_write_symbols): Handle bfd_link_hash_defweak.
(aout_link_write_other_symbol): Likewise.
(aout_link_input_section_std): Likewise.
(aout_link_input_section_ext): Likewise.
* bout.c (get_value): Likewise.
* coff-a29k.c (coff_a29k_relocate_section): Likewise.
* coff-alpha.c (alpha_convert_external_reloc): Likewise.
(alpha_relocate_section): Likewise.
* coff-mips.c (mips_relocate_section): Likewise.
(mips_relax_section): Likewise.
(bfd_mips_ecoff_create_embedded_relocs): Likewise.
* cofflink.c (coff_write_global_sym): Likewise.
(_bfd_coff_generic_relocate_section): Likewise.
* ecoff.c (ecoff_link_add_externals): Likewise.
(ecoff_link_write_external): LIkewise.
* elf32-hppa.c (elf32_hppa_relocate_section): Likewise.
(elf32_hppa_size_stubs): Likewise.
* elf32-i386.c (elf_i386_adjust_dynamic_symbol): Likewise.
(elf_i386_relocate_section): Likewise.
(elf_i386_finish_dynamic_symbol): Likewise.
* elf32-mips.c (mips_elf_output_extsym): Likewise.
(mips_elf_relocate_section): Likewise.
* elf32-sparc.c (elf32_sparc_adjust_dynamic_symbol): Likewise.
(elf32_sparc_relocate_section): Likewise.
* elfcode.h (elf_link_add_object_symbols): Likewise.
(elf_adjust_dynamic_symbol): Likewise.
(elf_bfd_final_link): Likewise.
(elf_link_output_extsym): Likewise.
* i386linux.c (linux_add_one_symbol): Likewise.
(linux_tally_symbols): Likewise.
(linux_finish_dynamic_link): Likewise.
* linker.c (_bfd_generic_link_output_symbols): Likewise.
(set_symbol_from_hash): Likewise.
* reloc16.c (bfd_coff_reloc16_get_value): Likewise.
(bfd_perform_slip): Likewise.
* sunos.c (sunos_add_one_symbol): Likewise.
(sunos_scan_std_relocs): Likewise.
(sunos_scan_ext_relocs): Likewise.
(sunos_scan_dynamic_symbol): Likewise.
(sunos_write_dynamic_symbol): Likewise.
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Search through it rather than through unsorted section headers.
(assign_file_positions_except_relocs): Pass sorted_hdrs to
map_program_segments.
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of h if we might not be doing an ELF link.
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(assign_file_positions_except_relocs): Free sorted_hdrs.
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we are using an ELF hash table.
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Add eabi support.
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flags to be set, so don't insist otherwise.
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undefined or common symbol.
(elf_link_add_object_symbols): Likewise.
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values to the same type.
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value is the start of the section.
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archive is not an ELF object, pass the archive to the add_symbols
entry point appropriate for the first object. From Eric Youngdale
<eric@aib.com>.
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referenced by a regular file.
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export_dynamic argument, and handle it.
(elf_export_symbol): New function.
* bfd-in.h (bfd_elf32_size_dynamic_sections): Update declaration.
(bfd_elf64_size_dynamic_sections): Update declaration.
* bfd-in2.h: Rebuild.
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and DT_FINI dynamic entries based on the existence of _init and
_fini symbols, not on the .init and .fini sections. This is
compatible with some SVR4 linkers.
(elf_bfd_final_link): Corresponding change.
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error if an empty archive has no symbol table.
* ecoff.c (ecoff_link_add_archive_symbols): Likewise.
* elfcode.h (elf_link_add_archive_symbols): Likewise.
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* elfcode.h (NAME(bfd_elf,size_dynamic_sections)): Don't finalize
the .dynsym, .dynstr or .hash sections until after the backend
size_dynamic_sections routine, so that it can add dynamic symbols
if it wants to.
* elf32-i386.c (elf_i386_adjust_dynamic_symbol): Don't define the
symbol to be in the .plt section when generating a shared library
if it is a defined symbol.
* elf32-sparc.c (elf32_sparc_adjust_dynamic_symbol): Likewise.
(elf32_sparc_size_dynamic_sections): When generating a shared
library, allocate space for a dynamic symbol for each output
section, storing the index in the dynindx field of the ELF section
data. Adjust the other dynindx fields to account for this.
(elf32_sparc_adjust_dynindx): New static function.
(elf32_sparc_relocate_section): When copying a reloc into a shared
library, use the original addend as appropriate. Convert an
R_SPARC_32 reloc into an R_SPARC_RELATIVE reloc. Use the dynamic
symbol index of the output section, not the normal symbol index.
(elf32_sparc_finish_dynamic_sections): Don't die if a section does
not exist when setting the value of the dynamic tags. Write out
a dynamic symbol for each output section.
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objects were seen, even when linking PIC code.
* libelf.h (ELF_LINK_HASH_NEEDS_PLT): Define.
(struct elf_link_hash_table): Add field dynamic_sections_created.
* elfcode.h (elf_link_record_dynamic_symbol): Create dynstr if it
doesn't already exist.
(elf_link_add_object_symbols): Create dynamic sections based on
dynamic_sections_created field, not dynobj field. Don't bother to
set dynobj.
(elf_link_create_dynamic_sections): If dynamic sections were
already created, don't do anything. If dynobj is already set, use
it; otherwise, set it to the bfd argument. Don't initialize
dynsymcount. Only create dynstr if it does not exist. Set
dynamic_sections_created to true.
(NAME(bfd_elf,size_dynamic_sections)): Skip most of this function
if no dynamic objects were seen.
(elf_adjust_dynamic_symbol): If a symbol has the
ELF_LINK_HASH_NEEDS_PLT flag set, let the backend adjust it.
(elf_bfd_final_link): Change most decisions based on dynobj to
check dynamic_sections_created instead.
(elf_link_output_extsym): Only handle dynamic symbols if a dynamic
object was seen.
* elf.c (_bfd_elf_link_hash_table_init): Initialize new field
dynamic_sections_created. Set dynsymcount to 1, not 0.
* elf32-i386.c (elf_i386_create_dynamic_sections): Call
elf_i386_create_got_section rather than creating the .got and
.got.plt sections.
(elf_i386_create_got_section): New static function.
(elf_i386_check_relocs): Just call elf_i386_create_got_section if
a GOT table is needed, not bfd_elf32_link_create_dynamic_sections.
Only create the .rel.got section, and only make space for a reloc,
for a global symbol or when generating a shared object. For a
R_386_PLT32 reloc, just set the ELF_LINK_HASH_NEEDS_PLT flag.
(elf_i386_adjust_dynamic_symbol): Rework initial assertion to
permit ELF_LINK_HASH_NEEDS_PLT non dynamic symbols. Create a
procedure linkage table entry for such symbols. But, if no
dynamic objects were seen, never create a PLT entry.
(elf_i386_size_dynamic_sections): If no dynamic objects were seen,
skip most of this function, and force the size of the .rel.got
section to zero.
(elf_i386_relocate_section): For a R_386_GOT32 reloc against a global
symbol when no dynamic object was seen, initialize the contents of
the .got section. For a R_386_GOT32 against a local symbol, only
create a R_386_RELATIVE reloc when generating a shared object.
Treat a R_386_PLT32 reloc against a symbol for which we did not
create a PLT entry as a R_386_PC32 reloc.
(elf_i386_finish_dynamic_sections): Only fiddle with the dynamic
entries and the PLT if we saw a dynamic object.
* elf32-sparc.c (elf_sparc_howto_table): Fix R_SPARC_PC22 by
setting rightshift to 10. Fix R_SPARC_WPLT20 by setting
rightshift to 2, size to 2, bitsize to 30, and dst_mask to
0x3fffffff.
(elf32_sparc_create_dynamic_sections): Don't set the size of the
.plt section. Call elf32_sparc_create_got_section rather than
creating the .got section.
(elf32_sparc_check_relocs): Call elf32_sparc_create_got_section if
a GOT table is needed, not bfd_elf32_link_create_dynamic_sections.
Only create the .rela.got section, and only make space for a
reloc, for a global symbol or when generating a shared object.
Set the alignment of the .rela.got section to 2. For a
R_SPARC_WPLT30 reloc, just set the ELF_LINK_HASH_NEEDS_PLT flag.
(elf32_sparc_adjust_dynamic_symbol): Rework initial assertion to
permit ELF_LINK_HASH_NEDS_PLT non dynamic symbols. Create a
procedure linkage table for such symbols. But, if no dynamic
objects were seen, never create a PLT entry. Initialize the size
of the .plt section.
(elf32_sparc_size_dynamic_sections): If no dynamic objects were
seen, skip most of this function, and force the size of the
.rela.got section to zero. Strip empty reloc sections, and strip
an empty .plt section.
(elf32_sparc_relocate_section): For a GOT reloc against a global
symbol when no dynamic object was seen, initialize the contents of
the .got section. For a GOT reloc against a local symbol, only
create a R_SPARC_RELATIVE reloc when generating a shared object.
Treat a R_SPARC_WPLT30 reloc against a symbol for which we did not
create a PLT entry as a R_SPARC_WDISP30 reloc.
(elf32_sparc_finish_dynamic_sections): Only fiddle with the
dynamic entries and the PLT if we saw a dynamic object.
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in a section not owned by any BFD.
(elf_section_from_bfd_section): Separate out loop which calls
backend routine. Check bfd_section and call the backend routine
even for a section not owned by any BFD.
* elf32-mips.c (mips_elf_section_from_bfd_section): Handle
.acommon section.
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* elfcode.h (elf_stringtab_init): New static function.
(bfd_new_strtab, bfd_add_to_strtab, bfd_add_2_to_strtab): Remove.
Change all callers to use elf_stringtab_init or
_bfd_stringtab_add, and get stringtab lengths using
_bfd_stringtab_size.
(elf_fake_sections): Change ignored argument to pointer to
boolean, and set the boolean to true if an error occurs. If an
error has already occurred, don't do anything.
(assign_section_numbers): Just set sh_size, not contents.
(elf_compute_section_file_positions): Pass the address of a
boolean to elf_fake_sections. Pass the address of a
bfd_strtab_hash to swap_out_syms. Write out the .strtab section.
(prep_headers): Change shstrtab to bfd_strtab_hash.
(swap_out_syms): Take a pointer to a bfd_strtab_hash as an
argument. Set it to the symbol names.
(NAME(bfd_elf,write_object_contents)): Write out the section
header names using _bfd_stringtab_emit.
(elf_debug_section): Remove first argument; get the section name
via the bfd_section pointer. Change caller.
(elf_bfd_final_link): Write out the symbol names using
_bfd_stringtab_emit. Likewise for the .dynstr section contents.
Free the symbol names at the end of the function.
(elf_link_input_bfd): Remove the last argument, output_names,
from relocate_section. Save the old symbol contents before
calling elf_link_output_sym, and restore them afterward.
* libelf.h (struct elf_link_hash_table): Change dynstr field to
struct bfd_strtab_hash.
(struct elf_backend_data): Remove last argument, output_names,
from elf_backend_relocate_section field.
(struct strtab): Don't define.
(struct elf_obj_tdata): Change strtab_ptr field to struct
bfd_strtab_hash.
* elf32-hppa.c (elf32_hppa_relocate_section): Remove last
argument, output_names.
* elf32-i386.c (elf_i386_relocate_section): Likewise.
* elf32-mips.c (mips_elf_relocate_section): Likewise.
* elf32-sparc.c (elf32_sparc_relocate_section): Likewise.
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Clear contents field.
(bfd_section_from_shdr): In SHT_STRTAB case, check bfd_section,
not rawdata. Don't set rawdata if e_shstrndx. Use bfd_section
rather than rawdata in commented out code. In SHT_REL[A] case,
don't bother to check elf_section_data of section returned by
section_from_elf_index.
(elf_fake_sections): Set bfd_section, not rawdata. Don't set
size.
(elf_map_symbols): Don't set elf_num_section_syms. Don't create
section symbols that already exist.
(assign_file_position_for_section): Use bfd_section, not rawdata.
(section_from_elf_index): Just check bfd_section field.
(elf_section_from_bfd_section): Likewise.
(elf_debug_section): Don't print rawdata, contents, or size.
(elf_link_add_object_symbols): Don't error out if
section_from_elf_index returns NULL.
(elf_bfd_final_link): Check return value from
section_from_elf_index against NULL, not bfd_is_abs_section.
(elf_link_input_bfd): Don't check section_from_elf_index return
value.
* libelf.h (struct elf_obj_tdata): Remove num_section_syms field.
(elf_num_section_syms): Don't define.
* elf.c (elf_get_str_section): Store section contents in contents
field rather than rawdata field.
(elf_string_from_elf_section): Likewise.
(_bfd_elf_make_section_from_shdr): Store BFD section pointer in
bfd_section field rather than rawdata field.
* elf32-hppa.c (elf32_hppa_read_symext_info): Use bfd_section
rather than rawdata.
(elf32_hppa_size_stubs): Likewise.
* elf32-mips.c (mips_elf_final_write_processing): Use bfd_section
rathern than rawdata.
(mips_elf_section_from_shdr): Likewise.
(mips_elf_section_processing): Likewise.
(mips_elf_section_from_bfd_section): Remove rawdata check.
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it slow. Besides, it isn't used much.
* elfcode.h (elf_map_symbols): Always allocate new storage for the symbol table.
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type.
(coff_read_string_table): Cast argument to bfd_h_get_32 to correct type.
* elfcode.h (elf_link_output_extsym): Cast argument to bfd_elf_hash to correct
type.
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SEC_IN_MEMORY section is found in dynobj. This can happen when
linking PIC compiled code.
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(case bfd_print_symbol_all): Print symbol's size field, except for common
symbols; print their alignment.
* elfcode.h (elf_print_symbol): Deleted.
* libelf.h (bfd_elf_print_symbol): Declare.
(bfd_elf{32,64}_print_symbol): Replace declarations with macros.
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too much space for the program header, only if we allocated too
little.
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to STT_FUNC if the BSF_FUNCTION flag is set.
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argument, and use it to set DT_SONAME dynamic entry.
* bfd-in.h (bfd_elf32_size_dynamic_sections): Update prototype.
(bfd_elf64_size_dynamic_sections): Update prototype.
* bfd-in2.h: Rebuilt.
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shared object has SHF_ALLOC set, create a BFD section for it.
(elf_section_from_bfd_section): There may be a BFD section for a
SHT_SYMTAB section.
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section index.
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table, try using the dynamic symbol table. From Eric Youngdale
<ericy@cais.cais.com>.
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(assign_file_positions_except_relocs): Likewise.
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* elfcode.h (elf_link_create_dynamic_sections): Set type of
_DYNAMIC to STT_OBJECT.
(NAME(bfd_elf,record_link_assignment)): Always create hash table
entry. Set type to STT_OBJECT.
(elf_link_output_extsym): Don't set type of weak defined symbol to
STB_WEAK if symbol was referenced.
* elf32-i386.c (elf_i386_create_dynamic_sections): Set type of
_GLOBAL_OFFSET_TABLE to STT_OBJECT.
(elf_i386_check_relocs): Ignore local PLT32 relocs.
(elf_i386_relocate_section): Treat local PLT32 relocs as PC32.
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handling again.
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if there aren't any.
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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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