* elf64-ppc.c (struct ppc_stub_hash_entry): Delete "addend".
(ppc64_elf_size_stubs): Don't set "addend".
(ppc64_elf_relocate_section): Don't allow calls via
toc-adjusting stubs without a following nop even in an
executable, except for self-calls and both libc_start_main
and .libc_start_main.
gold/
* powerpc.cc (Target_powerpc::Relocate::relocate): Update self-call
comment.
* powerpc.cc (Output_data_brlt_powerpc::reset_brlt_sizes): New
function.
(Output_data_brlt_powerpc::finalize_brlt_sizes): New function.
(Target_powerpc::do_relax): Call the above.
on garbage collected .opd section.
* powerpc.cc (Target_powerpc::do_gc_add_reference): Test dst_shndx
is non-zero.
(Target_powerpc::do_gc_mark_symbols): Likewise for sym->shndx().
(Target_powerpc::do_function_location): Likewise for loc->shndx.
owner when sections are not adjacent and exceed group size.
(Target_powerpc::group_sections): Handle corner case.
(Target_powerpc::Branch_info::make_stub): Handle case where
stub table doesn't exist due to branches in non-exec sections.
(Target_powerpc::Relocate::relocate): Likewise.
static and public. Add report_err param. Return false for data refs.
(Target_powerpc::rela_dyn_section): New overloaded function.
(Target_powerpc::plt_, iplt_): Elucidate.
(Output_data_plt_powerpc::entry_count): Handle current_data_size()==0.
(Output_data_plt_powerpc::do_write): Don't write .iplt.
(Output_data_plt_powerpc::plt_entry_count): Don't add .iplt entries.
(Target_powerpc::Scan::local, global): Adjust reloc_needs_plt_for_ifunc
calls. Put ifunc dynamic relocs in irela_dyn_section. Only
push_branch and make_plt_entry for ifunc syms when
reloc_needs_plt_for_ifunc.
(Target_powerpc::Relocate::relocate): Don't use plt entry value
for ifunc unless reloc_needs_plt_for_ifunc.
* target.cc (Target::do_plt_fde_location): New function.
* ehframe.h (class FDE): Add post_map field to u_.from_linker,
accessor function, and constructor param.
(struct Post_fde, Post_fdes): Declare.
(Cie::write): Add post_fdes param.
* ehframe.cc (Fde::write): Use plt_fde_location.
(struct Post_fde): Define.
(Cie::write): Stash FDEs added post merge mapping.
(Eh_frame::add_ehframe_for_plt): Assert no new CIEs after mapping.
Adjust Fde constructor call. Bump final_data_size_ for post map FDEs.
(Eh_frame::do_sized_write): Arrange to write post map FDES after
other FDEs.
* powerpc.cc (Target_powerpc::do_plt_fde_location): New function.
(Target_powerpc::has_glink): New function.
(Target_powerpc::do_relax): Add eh_frame info for stubs.
(struct Eh_cie, eh_frame_cie, glink_eh_frame_fde_64,
glink_eh_frame_fde_32, default_fde): New data.
(Stub_table::eh_frame_added_): New var.
(Stub_table::find_long_branch_entry, stub_address, stub_offset):
Make const.
(Stub_table::add_eh_frame): New function.
(Output_data_glink::add_eh_frame): New function.
(Target_powerpc::make_glink_section): Call add_eh_frame.
(class Relocate, class Scan): Inherit Track_tls.
(Target_powerpc::Scan::local, global): Track tls optimization
and avoid creating plt entry for __tls_get_addr if all uses
are optimized away.
(Target_powerpc::Relocate::relocate): Update to use Track_tls.
plt_thread_safe. Update stub_group_size help text.
* powerpc.cc (Target_powerpc::plt_thread_safe): New access function
for new plt_thread_safe_ var.
(use_plt_offset): Correct comments.
(Target_powerpc::do_relax): Look for thread creation symbols to
determine default plt_thread_safe value. Clear plt call stubs
as well as branch stubs each iteration.
(add_2_2_11, add_12_12_11, bnectr_p4, cmpldi_2_0, xor_11_11_11): New
insn constants.
(l, hi, ha, write_insn): Move earlier.
(Stub_table): Delete prev_size, add last_plt_size and last_branch_size.
(Stub_table::clear_stubs): Rename from clear_long_branch_stubs, clear
plt stubs too.
(Stub_table::update_size): Adjust.
(Stub_table::prev_size, set_prev_size): Delete.
(Stub_table::stub_align): Let --plt-align affect result.
(Stub_table::plt_call_size): Calculate sizes for various stubs.
(Stub_table::branch_stub_size): Use last_plt_size in address calc.
(Stub_table::add_plt_call_stub): Pass iterator to plt_call_size.
(Stub_table::do_write): Support more stub variants.
* layout.cc (Layout::get_executable_sections): New function.
* arm.cc (Target_arm::group_sections): Use it.
(Arm_output_section::group_sections): Delete now redundant test.
* output.cc (Output_reloc::Output_reloc): Add is_relative.
param to handle relative relocs.
* output.h (Output_reloc::Output_reloc <absolute reloc>): Likewise.
(Output_data_reloc::add_absolute): Adjust.
(Output_data_reloc::add_relative): New function.
(Output_data::reset_data_size): New function.
(Output_relaxed_input_section::set_relobj, set_shndx): New functions.
(Output_section::set_addralign): New function.
(Output_section::checkpoint_set_addralign): New function.
(Output_section::clear_section_offsets_need_adjustment): New function.
(Output_section::input_sections): Make public.
* powerpc.cc (class Output_data_brlt_powerpc): New.
(class Stub_table, class Stub_control): New.
(Powerpc_relobj::has14_, set_has_14bit_branch, has_14bit_branch,
stub_table_, set_stub_table, stub_table): New vectors and accessor
functions.
(Target_powerpc::do_may_relax, do_relax, push_branch,
new_stub_table, stub_tables, brlt_section, group_sections,
add_branch_lookup_table, find_branch_lookup_table,
write_branch_lookup_table, make_brlt_section): New functions.
(Target_powerpc::struct Sort_sections, class Branch_info): New.
(Target_powerpc::brlt_section_, stub_tables_, branch_lookup_table_,
branch_info_): New vars.
(Target_powerpc::make_plt_entry, make_local_ifunc_plt_entry): Don't
make call stubs here.
(Output_data_glink): Remove all call stub handling from this class.
(Target_powerpc::Scan::local, global): Save interesting branch
relocs and relocs for ifunc. Adjust calls to plt entry functions.
(Target_powerpc::do_finalize_sections): Only make reg save/restore
functions on final link.
(Target_powerpc::Relocate::relocate): Adjust lookup of call stubs.
Handle long branch destinations too.
(Target_powerpc::do_dynsym_value, do_plt_address_for_global,
do_plt_address_for_local): Adjust lookup of plt call stubs.
(struct Opd_ent): Use "Address" rather than "Offset".
(Output_data_got_powerpc::got_base_offset): Return Valtype.
(Target_powerpc::got_section): Make public.
(Target_powerpc::scan_relocs): Move code setting symbols..
(Powerpc_relobj::do_scan_relocs): ..to here, new function.
Create _SDA_BASE_ only when referenced.
dynamic relocs for GOT_TPREL got entries, without symbol if
resolving locally.
(Target_powerpc::do_gc_add_reference): Don't add for dynamic objects.
(Target_powerpc::scan_relocs): Define _GLOBAL_OFFSET_TABLE_ early.
(Target_powerpc::Relocate:relocate): REL32 reloc may be unaligned.
(Target_powerpc::do_finalize_sections): Call it.
(Output_data_save_res): New class and supporting functions.
(Target_powerpc::symval_for_branch): Only look up .opd entry for
normal symbols defined in object files.
(struct Opd_ent): Make "discard" a bit field. Add "gc_mark".
(Target_powerpc::do_gc_mark_symbol): Delay marking function code
section if scan_opd_relocs not yet called.
(Target_powerpc::gc_process_relocs): Call process_gc_mark.
do_plt_address_for_global): New functions.
(Output_data_got_powerpc::do_write): Don't segfault when linking
statically.
(Output_data_plt_powerpc::add_entry, add_ifunc_entry,
add_local_ifunc_entry): Return true on adding entry..
(Target_powerpc::make_plt_entry): ..use to avoid unnecessary
glink->add_entry call. Remove unused symtab param. Adjust calls.
(Target_powerpc::make_local_ifunc_plt_entry): Likewise.
(Target_powerpc::make_iplt_section): Remove symtab param. Don't
set up symbols here.
(Target_powerpc::do_finalize_sections): Instead set up __rela_iplt
syms here. Do so even when no .iplt. Don't segfault when linking
statically.
(Output_data_glink::add_entry, find_entry): Rearrange params. Add
new variants without reloc param.
(Glink_sym_ent::Glink_sym_ent): Likewise.
(Target_powerpc::Scan::reloc_needs_plt_for_ifunc): Accept any
reloc when refs will resolve to plt call stub.
(Target_powerpc::Scan::local): Correct ifunc handling. Allow
R_PPC_PLTREL24 to resolve locally.
(Target_powerpc::Scan::global): Correct ifunc handling.
(Target_powerpc::Relocate::relocate): Correct local sym glink
lookup. Don't destroy "value" when we have a plt call stub,
and when checking plt call validity.
(Target_powerpc::do_dynsym_value): Simplify.
(Target_powerpc::iplt_section, make_iplt_section,
reloc_needs_plt_for_ifunc, make_local_ifunc_plt_entry): New functions.
(Target_powerpc::make_plt_entry): Handle ifunc syms.
Target_powerpc::plt_entry_count): Count iplt entries too.
(Output_data_plt_powerpc::Output_data_plt_powerpc): Don't create
reloc section in constructor. New params.
(Target_powerpc::make_plt_section): Create reloc section here instead.
(Output_data_plt_powerpc::add_ifunc_entry, add_local_ifunc_entry): New
functions.
(Output_data_plt_powerpc::initial_plt_entry_size_, name_): New vars.
(Output_data_glink::add_entry, find_entry): New functions to
deal with local syms.
(Glink_sym_ent): Add support for local syms.
(Output_data_glink::do_write): Handle ifunc plt entries.
(Target_powerpc::Scan::get_reference_flags): Handle more relocs.
(Target_powerpc::Scan::local, global): Handle ifunc syms.
(Target_powerpc::Relocate::relocate): Likewise.
(Target_powerpc::do_dynsym_value): Use glink stub, not plt entry.
do_adjust_local_symbol): New functions.
* object.cc (Sized_relobj_file::do_count_local_symbols): Use the above.
* powerpc.cc (Powerpc_relobj::do_adjust_local_symbol): New function.
(Powerpc_relobj::scan_opd_relocs): Warn on unexpected opd relocs
and irregular opd entry spacing.
(Powerpc_relobj::do_read_relocs): Add opd size checks.
(Global_symbol_visitor_opd): New functor.
(Target_powerpc::do_finalize_sections): Omit global symbols defined
on deleted opd entries.
against symbols in discarded sections. Pass is_discarded
param.
* arm.cc, * i386.cc, * sparc.cc, * x86_64.cc (Target_*::Scan::local):
Add is_discarded param.
* powerpc (Target_powerpc::Scan::local): Likewise. Use
is_discarded to flag opd entry as discarded. Don't emit dyn
relocs on such entries.
(Target_powerpc::Scan::global): Similarly detect and handle
such opd entries.
(Powerpc_relobj): Replace opd_ent_shndx_ and opd_ent_off_ with
opd_ent_. Update all uses.
(Powerpc_relobj::get_opd_discard, set_opd_discard): New functions.
(Target_powerpc::relocate_section): Zero out discarded opd
entry relocs.
(Sized_target::gc_add_reference, do_gc_add_reference): New functions.
* gc.h (gc_process_relocs): Call target gc_add_reference.
* gold.cc (queue_middle_tasks): Use gc_mark_symbol on start sym.
* symtab.cc (Symbol_table::gc_mark_undef_symbols): Use gc_mark_symbol.
(Symbol_table::gc_mark_symbol): Call target gc_mark_symbol. Remove
unnecessary cast.
* powerpc.cc (Powerpc_relobj::get_opd_ent): Rearrange parameters
to cater for when we don't need code offset. Update use.
(Powerpc_relobj::access_from_map_, opd_valid_): New vars.
(Powerpc_relobj::access_from_map, add_reference, opd_valid,
set_opd_valid): New functions.
(Target_powerpc::do_gc_add_reference): New function.
(Target_powerpc::gc_process_relocs): Call gc()->add_reference on
stashed refs.
(Target_powerpc::do_gc_mark_symbol): New function.
(Powerpc_relobj::toc_base_offset): New stub function.
(Target_powerpc): Add tp_offset, dtp_offset. Rename
got_mod_index_offset to tlsld_got_offset. Update all refs.
(Target_powerpc::Relocate::enum skip_tls): New.
(Target_powerpc::call_tls_get_addr_): New var.
(Target_powerpc::is_branch_reloc): Move to file scope.
(Target_powerpc::relocate_tls, optimize_tls_reloc): Delete.
(Target_powerpc::optimize_tls_gd, optimize_tls_ld, optimize_tls_ie):
New functions.
(Target_powerpc::enum Got_type): Delete old values, add new ones.
(powerpc_info): Correct common_pagesize for ppc64.
(at_tls_transform, needs_dynamic_reloc, use_plt_offset): New functions.
(Powerpc_relocate_functions): Add overflow check enums and functions.
Add non-shift version of rela, rela_ua. Delete all rel public
functions. Delete addr16_lo. Add addr64, addr64_u, addr32,
addr32_u, addr24, addr16_u, addr16_hi2, addr16_ha2, addr16_hi3,
addr16_ha3, addr14 functions.
(Output_data_got_powerpc::add_constant_pair): New function.
(Output_data_got_powerpc::got_base_offset): Likewise.
(Output_data_got_powerpc::do_write): Correct 64-bit got header.
(instruction constants): Sort, add some more.
(Output_data_glink::do_write): Add and use Address typedef. Use
object->toc_base_offset() stub for 64-bit.
(Target_powerpc::tlsld_got_offset): Use add_constant_pair.
(Target_powerpc::Scan::get_reference_flags): Handle more relocs.
(Target_powerpc::Scan::local, global): Emit relative dynamic reloc
for R_PPC64_TOC. Handle more relocs. Generate got entries for TLS.
Always treat .opd relocs as against locally defined symbol.
Correct condition for RELATIVE relocs.
(Target_powerpc::do_finalize_sections): Test for NULL sections.
(Target_powerpc::Relocate::relocate): Use plt call stub as value
for 32-bit syms with a plt entry. Correct ppc64 toc base
calculations. Handle TLS relocs, and more. Add overflow
checking and adjust for Powerpc_relocate_functions changes.
(Target_powerpc::relocate_for_relocatable): Handle zero r_sym.
Reinstate --emit-relocs code with FIXME.
(Powerpc_relobj): Rename got2_section_ to special_.
Add opd_ent_shndx_ and opd_ent_off_ vectors.
(Powerpc_relobj::opd_shndx, init_opd, get_opd_ent, set_opd_ent,
scan_opd_relocs, do_read_relocs, opd_ent_ndx): New functions.
(Target_powerpc): Add Address typedef and invalid_address. Use
throughout.
(Target_powerpc::is_branch_reloc): New function.
(Powerpc_relocate_functions): Add Address typedef, use throughout.
(Powerpc_relocate_functions:rela, rela_ua): Correct type used
for dst_mask, value and addend.
(Powerpc_relobj::do_find_special_sections): Find .opd for 64-bit.
(ld_2_1, cror_15_15_15, cror_31_31_31): New insn constants.
(Output_data_glink::do_write): Correct toc base. Don't try to use
uint16_t for 24-bit offset. Use get_output_section_offset and
check return.
(Target_powerpc::Scan::local): Handle more relocs.
(Target_powerpc::do_finalize_sections): Set up DT_PPC64_GLINK.
(Target_powerpc::Relocate::relocate): Correct toc base calculation.
Plug in toc restoring insn after plt calls. Translate branches
to function descriptor symbols to corresponding entry point.
(Target_powerpc::relocate_for_relocatable): Check return from
get_output_section_offset.
* symtab.h: Comment typo.
(Target::do_output_section_name): New function.
* layout.cc (Layout::choose_output_section): Call the above.
* powerpc.cc (Target_powerpc::do_output_section_name): New function.
* powerpc.h: Add more relocs.
(R_PPC_REL16*): Rename to R_POWERPC_REL16*.
gold/
* powerpc.cc: Update for renamed R_PPC_REL16 relocs.
(Output_data_got_powerpc::do_write): Don't rely on base class lookup
for replace_constant call.
(Output_data_plt_powerpc::do_print_to_mapfile): New function.
(Output_data_glink::do_print_to_mapfile): New function.
(Target_powerpc::Scan::local): Ignore R_PPC64_TOCSAVE.
(Target_powerpc::Relocate::relocate): Likewise.
(Powerpc_relobj::do_find_special_sections): Don't use set_got2_shndx.
(Output_data_glink::add_entry,find_entry): Remove shndx param.
(class Glink_sym_ent): Rename from struct Glink_sym_ent. Remove
all references to shndx_. Handle special case for R_PPC_PLTREL24
here.
(class Glink_sym_ent_hash): Rename from struct Glink_sym_ent_hash.
(Output_data_glink::do_write): Retrieve got2_shdnx from object.
(Target_powerpc::make_plt_entry): Don't special case R_PPC_PLTREL24
here.
(Target_powerpc::Scan::global): Nor on make_plt_entry call.
(Target_powerpc::Relocate::relocate): Nor on glink->find_entry call.
(Sized_relobj_file::find_special_sections): New function.
* object.cc (Sized_relobj_file::find_shdr): New function.
(Sized_relobj_file::find_eh_frame): Use find_shdr.
(Sized_relobj_file::find_special_sections): New function, split out..
(Sized_relobj_file::do_read_symbols): ..from here.
* output.h (Output_data_got::replace_constant): New function.
(Output_data_got::num_entries): New function.
(Output_data_got::last_got_offset,set_got_size): Use num_entries.
(Output_data_got::got_offset): Protected rather than private.
(Output_data_got::replace_got_entry): New function.
* output.cc (Output_data_got::replace_got_entry): New function.
* powerpc.cc (class Powerpc_relobj): New.
(class Powerpc_relocate_functions): Delete all psymval variants or
convert to value,addend type. Delete pcrela, pcrela_unaligned.
Implement _ha functions using corresponding _hi function.
(Powerpc_relobj::find_special_sections): New function.
(Target_powerpc::do_make_elf_object): New function.
(class Output_data_got_powerpc): New.
(class Output_data_glink): New.
(class Powerpc_scan_relocatable_reloc): New.
Many more changes througout file.
Alan Modra
Cary Coutant
Ian Lance Taylor
Roland McGrath
Andreas Schwab