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author | Vladimir Radosavljevic <Vladimir.Radosavljevic@imgtec.com> | 2016-06-20 12:10:53 -0700 |
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committer | Cary Coutant <ccoutant@gmail.com> | 2016-06-20 12:16:26 -0700 |
commit | a8ecc9fe61d0fdb1f694c5f3fac910802468d43f (patch) | |
tree | 51bfde2464642854b5c74f29b5f0cb0b392f7df4 /gold | |
parent | beceef50438ccf2917744147a4fdadcc84db7d78 (diff) | |
download | binutils-a8ecc9fe61d0fdb1f694c5f3fac910802468d43f.zip binutils-a8ecc9fe61d0fdb1f694c5f3fac910802468d43f.tar.gz binutils-a8ecc9fe61d0fdb1f694c5f3fac910802468d43f.tar.bz2 |
Add support for MIPS .rld_map section.
Includes DT_MIPS_RLD_MAP and DT_MIPS_RLD_MAP_REL dynamic tags and
__RLD_MAP symbol.
2016-06-20 Vladimir Radosavljevic <Vladimir.Radosavljevic@imgtec.com>
elfcpp/
* elfcpp.h (DT_MIPS_RLD_MAP_REL): New enum constant.
gold/
* mips.cc (Target_mips::Target_mips): Initialize rld_map_.
(Target_mips::rld_map_): New data member.
(Target_mips::do_finalize_sections): Add support for
DT_MIPS_RLD_MAP and DT_MIPS_RLD_MAP_REL dynamic tags,
.rld_map section, and __RLD_MAP symbol.
(Target_mips::do_dynamic_tag_custom_value): Add support for
DT_MIPS_RLD_MAP_REL dynamic tag.
* output.cc (Output_data_dynamic::get_entry_offset): New method
definition.
* output.h (Output_data_dynamic::get_entry_offset): New method
declaration.
Diffstat (limited to 'gold')
-rw-r--r-- | gold/ChangeLog | 14 | ||||
-rw-r--r-- | gold/mips.cc | 51 | ||||
-rw-r--r-- | gold/output.cc | 21 | ||||
-rw-r--r-- | gold/output.h | 4 |
4 files changed, 85 insertions, 5 deletions
diff --git a/gold/ChangeLog b/gold/ChangeLog index cf8289b..a4c9d6c 100644 --- a/gold/ChangeLog +++ b/gold/ChangeLog @@ -1,5 +1,19 @@ 2016-06-20 Vladimir Radosavljevic <Vladimir.Radosavljevic@imgtec.com> + * mips.cc (Target_mips::Target_mips): Initialize rld_map_. + (Target_mips::rld_map_): New data member. + (Target_mips::do_finalize_sections): Add support for + DT_MIPS_RLD_MAP and DT_MIPS_RLD_MAP_REL dynamic tags, + .rld_map section, and __RLD_MAP symbol. + (Target_mips::do_dynamic_tag_custom_value): Add support for + DT_MIPS_RLD_MAP_REL dynamic tag. + * output.cc (Output_data_dynamic::get_entry_offset): New method + definition. + * output.h (Output_data_dynamic::get_entry_offset): New method + declaration. + +2016-06-20 Vladimir Radosavljevic <Vladimir.Radosavljevic@imgtec.com> + * mips.cc (Mips_relocate_functions::relpc16): Add unaligned check. 2016-06-20 Vladimir Radosavljevic <Vladimir.Radosavljevic@imgtec.com> diff --git a/gold/mips.cc b/gold/mips.cc index e2b7855..8893e31 100644 --- a/gold/mips.cc +++ b/gold/mips.cc @@ -3292,10 +3292,10 @@ class Target_mips : public Sized_target<size, big_endian> public: Target_mips(const Target::Target_info* info = &mips_info) : Sized_target<size, big_endian>(info), got_(NULL), gp_(NULL), plt_(NULL), - got_plt_(NULL), rel_dyn_(NULL), copy_relocs_(), dyn_relocs_(), - la25_stub_(NULL), mips_mach_extensions_(), mips_stubs_(NULL), - attributes_section_data_(NULL), abiflags_(NULL), mach_(0), layout_(NULL), - got16_addends_(), has_abiflags_section_(false), + got_plt_(NULL), rel_dyn_(NULL), rld_map_(NULL), copy_relocs_(), + dyn_relocs_(), la25_stub_(NULL), mips_mach_extensions_(), + mips_stubs_(NULL), attributes_section_data_(NULL), abiflags_(NULL), + mach_(0), layout_(NULL), got16_addends_(), has_abiflags_section_(false), entry_symbol_is_compressed_(false), insn32_(false) { this->add_machine_extensions(); @@ -4181,6 +4181,8 @@ class Target_mips : public Sized_target<size, big_endian> Output_data_space* got_plt_; // The dynamic reloc section. Reloc_section* rel_dyn_; + // The .rld_map section. + Output_data_zero_fill* rld_map_; // Relocs saved to avoid a COPY reloc. Mips_copy_relocs<elfcpp::SHT_REL, size, big_endian> copy_relocs_; @@ -9760,8 +9762,37 @@ Target_mips<size, big_endian>::do_finalize_sections(Layout* layout, if (this->plt_ != NULL) // DT_MIPS_PLTGOT dynamic tag odyn->add_section_address(elfcpp::DT_MIPS_PLTGOT, this->got_plt_); + + if (!parameters->options().shared()) + { + this->rld_map_ = new Output_data_zero_fill(size / 8, size / 8); + + layout->add_output_section_data(".rld_map", elfcpp::SHT_PROGBITS, + (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE), + this->rld_map_, ORDER_INVALID, false); + + // __RLD_MAP will be filled in by the runtime loader to contain + // a pointer to the _r_debug structure. + Symbol* rld_map = symtab->define_in_output_data("__RLD_MAP", NULL, + Symbol_table::PREDEFINED, + this->rld_map_, + 0, 0, elfcpp::STT_OBJECT, + elfcpp::STB_GLOBAL, + elfcpp::STV_DEFAULT, 0, + false, false); + + rld_map->set_needs_dynsym_entry(); + + if (!parameters->options().pie()) + // This member holds the absolute address of the debug pointer. + odyn->add_section_address(elfcpp::DT_MIPS_RLD_MAP, this->rld_map_); + else + // This member holds the offset to the debug pointer, + // relative to the address of the tag. + odyn->add_custom(elfcpp::DT_MIPS_RLD_MAP_REL); + } } - } +} // Get the custom dynamic tag value. template<int size, bool big_endian> @@ -9797,6 +9828,16 @@ Target_mips<size, big_endian>::do_dynamic_tag_custom_value(elfcpp::DT tag) const return this->get_dt_mips_symtabno(); } + case elfcpp::DT_MIPS_RLD_MAP_REL: + { + // The MIPS_RLD_MAP_REL tag stores the offset to the debug pointer, + // relative to the address of the tag. + Output_data_dynamic* const odyn = this->layout_->dynamic_data(); + unsigned int entry_offset = + odyn->get_entry_offset(elfcpp::DT_MIPS_RLD_MAP_REL); + gold_assert(entry_offset != -1U); + return this->rld_map_->address() - (odyn->address() + entry_offset); + } default: gold_error(_("Unknown dynamic tag 0x%x"), (unsigned int)tag); } diff --git a/gold/output.cc b/gold/output.cc index 077e2c4..0a9e58f 100644 --- a/gold/output.cc +++ b/gold/output.cc @@ -1882,6 +1882,27 @@ Output_data_dynamic::do_adjust_output_section(Output_section* os) gold_unreachable(); } +// Get a dynamic entry offset. + +unsigned int +Output_data_dynamic::get_entry_offset(elfcpp::DT tag) const +{ + int dyn_size; + + if (parameters->target().get_size() == 32) + dyn_size = elfcpp::Elf_sizes<32>::dyn_size; + else if (parameters->target().get_size() == 64) + dyn_size = elfcpp::Elf_sizes<64>::dyn_size; + else + gold_unreachable(); + + for (size_t i = 0; i < entries_.size(); ++i) + if (entries_[i].tag() == tag) + return i * dyn_size; + + return -1U; +} + // Set the final data size. void diff --git a/gold/output.h b/gold/output.h index 0b96a03..d8a8aaa 100644 --- a/gold/output.h +++ b/gold/output.h @@ -2781,6 +2781,10 @@ class Output_data_dynamic : public Output_section_data add_custom(elfcpp::DT tag) { this->add_entry(Dynamic_entry(tag)); } + // Get a dynamic entry offset. + unsigned int + get_entry_offset(elfcpp::DT tag) const; + protected: // Adjust the output section to set the entry size. void |