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cdc29364d1
report_object. (Add_archive_symbols::run): Track argument serial numbers. (Lib_group::include_member): Likewise. (Add_lib_group_symbols::run): Adjust call to report_archive_begin. * archive.h (Incremental_archive_entry::Archive_member): Initialize arg_serial_. (Archive_member::arg_serial_): New data member. * dynobj.cc (Dynobj::Dynobj): Allow input_file_ to be NULL. (Sized_dynobj::do_add_symbols): Track symbols when doing an incremental link. (Sized_dynobj::do_for_all_local_got_entries): New function. * dynobj.h: (Sized_dynobj::do_for_all_local_got_entries): New function. * fileread.cc (get_mtime): New function. * fileread.h (get_mtime): New function. * gold.cc (queue_initial_tasks): Check for incremental update. (process_incremental_input): New function. (queue_middle_tasks): Don't force valid target for incremental update. * incremental-dump.cc (find_input_containing_global): Adjust size of symbol info entry. (dump_incremental_inputs): Dump argument serial number and in_system_directory flag; bias shndx by 1; print symbol names when dumping per-file symbol lists; use new symbol info readers. * incremental.cc (Output_section_incremental_inputs:update_data_size): New function. (Sized_incremental_binary::setup_readers): Setup input readers for each input file; build maps for files added from libraries and scripts. (Sized_incremental_binary::check_input_args): New function. (Sized_incremental_binary::do_check_inputs): Build map of argument serial numbers to input arguments. (Sized_incremental_binary::do_file_has_changed): Rename do_file_is_unchanged to this; compare file modification times. (Sized_incremental_binary::do_init_layout): New function. (Sized_incremental_binary::do_reserve_layout): New function. (Sized_incremental_binary::do_get_input_reader): Remove. (Sized_incremental_binary::get_symtab_view): New function. (Incremental_checker::can_incrementally_link_output_file): Remove. (Incremental_inputs::report_command_line): Exclude --debug options. (Incremental_inputs::report_archive_begin): Add parameter; track argument serial numbers; don't put input file entry for archive before archive members. (Incremental_inputs::report_archive_end): Put input file entry for archive after archive members. (Incremental_inputs::report_object): Add parameter; track argument serial numbers and in_system_directory flag. (Incremental_inputs::report_script): Add parameter; track argument serial numbers. (Output_section_incremental_inputs::set_final_data_size): Adjust size of symbol info entry; check for forwarding symbols. (Output_section_incremental_inputs::write_input_files): Write in_system_directory flag and argument serial number. (Output_section_incremental_inputs::write_info_blocks): Map section indices between incremental info and original input file; store input section index for each symbol. (class Local_got_offset_visitor): Derive from Got_offset_list::Visitor; change operator() to visit(). (class Global_got_offset_visitor): Likewise. (class Global_symbol_visitor_got_plt): (Output_section_incremental_inputs::write_got_plt): Use new visitor classes. (Sized_incr_relobj::Sized_incr_relobj): New constructor. (Sized_incr_relobj::do_read_symbols): New function. (Sized_incr_relobj::do_layout): New function. (Sized_incr_relobj::do_layout_deferred_sections): New function. (Sized_incr_relobj::do_add_symbols): New function. (Sized_incr_relobj::do_should_include_member): New function. (Sized_incr_relobj::do_for_all_global_symbols): New function. (Sized_incr_relobj::do_for_all_local_got_entries): New function. (Sized_incr_relobj::do_section_size): New function. (Sized_incr_relobj::do_section_name): New function. (Sized_incr_relobj::do_section_contents): New function. (Sized_incr_relobj::do_section_flags): New function. (Sized_incr_relobj::do_section_entsize): New function. (Sized_incr_relobj::do_section_address): New function. (Sized_incr_relobj::do_section_type): New function. (Sized_incr_relobj::do_section_link): New function. (Sized_incr_relobj::do_section_info): New function. (Sized_incr_relobj::do_section_addralign): New function. (Sized_incr_relobj::do_initialize_xindex): New function. (Sized_incr_relobj::do_get_global_symbol_counts): New function. (Sized_incr_relobj::do_read_relocs): New function. (Sized_incr_relobj::do_gc_process_relocs): New function. (Sized_incr_relobj::do_scan_relocs): New function. (Sized_incr_relobj::do_count_local_symbols): New function. (Sized_incr_relobj::do_finalize_local_symbols): New function. (Sized_incr_relobj::do_set_local_dynsym_indexes): New function. (Sized_incr_relobj::do_set_local_dynsym_offset): New function. (Sized_incr_relobj::do_relocate): New function. (Sized_incr_relobj::do_set_section_offset): New function. (Sized_incr_dynobj::Sized_incr_dynobj): New function. (Sized_incr_dynobj::do_read_symbols): New function. (Sized_incr_dynobj::do_layout): New function. (Sized_incr_dynobj::do_add_symbols): New function. (Sized_incr_dynobj::do_should_include_member): New function. (Sized_incr_dynobj::do_for_all_global_symbols): New function. (Sized_incr_dynobj::do_for_all_local_got_entries): New function. (Sized_incr_dynobj::do_section_size): New function. (Sized_incr_dynobj::do_section_name): New function. (Sized_incr_dynobj::do_section_contents): New function. (Sized_incr_dynobj::do_section_flags): New function. (Sized_incr_dynobj::do_section_entsize): New function. (Sized_incr_dynobj::do_section_address): New function. (Sized_incr_dynobj::do_section_type): New function. (Sized_incr_dynobj::do_section_link): New function. (Sized_incr_dynobj::do_section_info): New function. (Sized_incr_dynobj::do_section_addralign): New function. (Sized_incr_dynobj::do_initialize_xindex): New function. (Sized_incr_dynobj::do_get_global_symbol_counts): New function. (make_sized_incremental_object): New function. (Incremental_library::copy_unused_symbols): New function. (Incremental_library::do_for_all_unused_symbols): New function. * incremental.h (enum Incremental_input_flags): New type. (class Incremental_checker): Remove. (Incremental_input_entry::Incremental_input_entry): Add argument serial number. (Incremental_input_entry::arg_serial): New function. (Incremental_input_entry::set_is_in_system_directory): New function. (Incremental_input_entry::is_in_system_directory): New function. (Incremental_input_entry::arg_serial_): New data member. (Incremental_input_entry::is_in_system_directory_): New data member. (class Script_info): Move here from script.h. (Script_info::Script_info): Add filename parameter. (Script_info::filename): New function. (Script_info::filename_): New data member. (Incremental_script_entry::Incremental_script_entry): Add argument serial number. (Incremental_object_entry::Incremental_object_entry): Likewise. (Incremental_object_entry::add_input_section): Build list of input sections with map to original shndx. (Incremental_object_entry::get_input_section_index): New function. (Incremental_object_entry::shndx_): New data member. (Incremental_object_entry::name_key_): Rename; adjust all refs. (Incremental_object_entry::sh_size_): Rename; adjust all refs. (Incremental_archive_entry::Incremental_archive_entry): Add argument serial number. (Incremental_inputs::report_archive_begin): Likewise. (Incremental_inputs::report_object): Likewise. (Incremental_inputs::report_script): Likewise. (class Incremental_global_symbol_reader): New class. (Incremental_input_entry_reader::Incremental_input_entry_reader): Read and store flags and input file type. (Incremental_input_entry_reader::arg_serial): New function. (Incremental_input_entry_reader::type): Extract type from flags. (Incremental_input_entry_reader::is_in_system_directory): New function. (Incremental_input_entry_reader::get_input_section_count): Call accessor function for type. (Incremental_input_entry_reader::get_symbol_offset): Call accessor function for type; adjust size of global symbol entry. (Incremental_input_entry_reader::get_global_symbol_count): Call accessor function for type. (Incremental_input_entry_reader::get_object_count): Likewise. (Incremental_input_entry_reader::get_object_offset): Likewise. (Incremental_input_entry_reader::get_member_count): Likewise. (Incremental_input_entry_reader::get_unused_symbol_count): Likewise. (Incremental_input_entry_reader::get_member_offset): Likewise. (Incremental_input_entry_reader::get_unused_symbol): Likewise. (Incremental_input_entry_reader::Global_symbol_info): Remove. (Incremental_input_entry_reader::get_global_symbol_info): Remove. (Incremental_input_entry_reader::get_global_symbol_reader): New function. (Incremental_input_entry_reader::get_output_symbol_index): New function. (Incremental_input_entry_reader::type_): Remove. (Incremental_input_entry_reader::flags_): New data member. (Incremental_inputs_reader::input_file_offset): New function. (Incremental_inputs_reader::input_file_index): New function. (Incremental_inputs_reader::input_file): Call input_file_offset. (Incremental_inputs_reader::input_file_at_offset): New function. (Incremental_relocs_reader::get_r_type): Reformat. (Incremental_relocs_reader::get_r_shndx): Reformat. (Incremental_relocs_reader::get_r_offset): Reformat. (Incremental_relocs_reader::data): New function. (Incremental_binary::Incremental_binary): Initialize new data members. (Incremental_binary::check_inputs): Add cmdline parameter. (Incremental_binary::file_is_unchanged): Remove. (Input_reader::arg_serial): New function. (Input_reader::get_unused_symbol_count): New function. (Input_reader::get_unused_symbol): New function. (Input_reader::do_arg_serial): New function. (Input_reader::do_get_unused_symbol_count): New function. (Input_reader::do_get_unused_symbol): New function. (Incremental_binary::input_file_count): New function. (Incremental_binary::get_input_reader): Change signature to use index instead of filename. (Incremental_binary::file_has_changed): New function. (Incremental_binary::get_input_argument): New function. (Incremental_binary::get_library): New function. (Incremental_binary::get_script_info): New function. (Incremental_binary::init_layout): New function. (Incremental_binary::reserve_layout): New function. (Incremental_binary::output_file): New function. (Incremental_binary::do_check_inputs): New function. (Incremental_binary::do_file_is_unchanged): Remove. (Incremental_binary::do_file_has_changed): New function. (Incremental_binary::do_init_layout): New function. (Incremental_binary::do_reserve_layout): New function. (Incremental_binary::do_input_file_count): New function. (Incremental_binary::do_get_input_reader): Change signature. (Incremental_binary::input_args_map_): New data member. (Incremental_binary::library_map_): New data member. (Incremental_binary::script_map_): New data member. (Sized_incremental_binary::Sized_incremental_binary): Initialize new data members. (Sized_incremental_binary::output_section): New function. (Sized_incremental_binary::inputs_reader): Add const. (Sized_incremental_binary::symtab_reader): Add const. (Sized_incremental_binary::relocs_reader): Add const. (Sized_incremental_binary::got_plt_reader): Add const. (Sized_incremental_binary::get_symtab_view): New function. (Sized_incremental_binary::Inputs_reader): New typedef. (Sized_incremental_binary::Input_entry_reader): New typedef. (Sized_incremental_binary::do_check_inputs): Add cmdline parameter. (Sized_incremental_binary::do_file_is_unchanged): Remove. (Sized_incremental_binary::do_file_has_changed): New function. (Sized_incremental_binary::do_init_layout): New function. (Sized_incremental_binary::do_reserve_layout): New function. (Sized_input_reader::Inputs_reader): Remove. (Sized_input_reader::Input_entry_reader): Remove. (Sized_input_reader::do_arg_serial): New function. (Sized_input_reader::do_get_unused_symbol_count): New function. (Sized_input_reader::do_get_unused_symbol): New function. (Sized_incremental_binary::do_input_file_count): New function. (Sized_incremental_binary::do_get_input_reader): Change signature; use index instead of filename. (Sized_incremental_binary::section_map_): New data member. (Sized_incremental_binary::input_entry_readers_): New data member. (class Sized_incr_relobj): New class. (class Sized_incr_dynobj): New class. (make_sized_incremental_object): New function. (class Incremental_library): New class. * layout.cc (Free_list::num_lists): New static data member. (Free_list::num_nodes): New static data member. (Free_list::num_removes): New static data member. (Free_list::num_remove_visits): New static data member. (Free_list::num_allocates): New static data member. (Free_list::num_allocate_visits): New static data member. (Free_list::init): New function. (Free_list::remove): New function. (Free_list::allocate): New function. (Free_list::dump): New function. (Free_list::print_stats): New function. (Layout_task_runner::run): Resize output file for incremental updates. (Layout::Layout): Initialize new data members. (Layout::set_incremental_base): New function. (Layout::init_fixed_output_section): New function. (Layout::layout_eh_frame): Do not build .eh_frame_hdr section for incremental updates. (Layout::create_gold_note): Do not create gold note section for incremental updates. (Layout::set_segment_offsets): Do not recalculate RELRO alignment for incremental updates. (Layout::set_section_offsets): For incremental updates, allocate space from free list. (Layout::create_symtab_sections): Layout with offsets relative to start of section; for incremental updates, allocate space from free list. (Layout::create_shdrs): For incremental updates, allocate space from free list. (Layout::finish_dynamic_section): For incremental updates, do not check --as-needed (fixed in subsequent patch). * layout.h (class Free_list): New class. (Layout::set_incremental_base): New function. (Layout::incremental_base): New function. (Layout::init_fixed_output_section): New function. (Layout::allocate): New function. (Layout::incremental_base_): New data member. (Layout::free_list_): New data member. * main.cc (main): Print Free_list statistics. * object.cc (Relobj::finalize_incremental_relocs): Add clear_counts parameter; clear counts only when clear_counts is set. (Sized_relobj::Sized_relobj): Initialize new base class. (Sized_relobj::do_layout): Don't report special sections. (Sized_relobj::do_for_all_local_got_entries): New function. (Sized_relobj::write_local_symbols): Add symtab_off parameter; add symtab_off to all symbol table offsets. (Sized_relobj::do_get_global_symbol_counts): Add typename keyword. * object.h (class Got_offset_list): Move to top of file. (Object::Object): Allow case where input_file == NULL. (Object::~Object): Likewise. (Object::input_file): Assert that input_file != NULL. (Object::lock): Allow case where input_file == NULL. (Object::unlock): Likewise. (Object::is_locked): Likewise. (Object::token): Likewise. (Object::release): Likewise. (Object::is_incremental): New function. (Object::get_mtime): New function. (Object::for_all_local_got_entries): New function. (Object::clear_view_cache_marks): Allow case where input_file == NULL. (Object::set_is_in_system_directory): New function. (Object::is_in_system_directory): New function. (Object::do_is_incremental): New function. (Object::do_get_mtime): New function. (Object::do_for_all_local_got_entries): New function. (Object::is_in_system_directory_): New data member. (Relobj::finalize_incremental_relocs): Add clear_counts parameter. (class Sized_relobj_base): New class. (class Sized_relobj): Derive from Sized_relobj_base. (class Sized_relobj::Symbols): Redeclare from base class. (class Sized_relobj::local_got_offset_list): Remove. (class Sized_relobj::Output_sections): Redeclare from base class. (class Sized_relobj::do_for_all_local_got_entries): New function. (class Sized_relobj::write_local_symbols): Add offset parameter. (class Sized_relobj::local_symbol_offset_): Update comment. (class Sized_relobj::local_dynsym_offset_): Update comment. * options.cc (Input_arguments::add_file): Remove const. * options.h (Input_file_argument::Input_file_argument): Initialize arg_serial_ (all constructors). (Input_file_argument::set_arg_serial): New function. (Input_file_argument::arg_serial): New function. (Input_file_argument::arg_serial_): New data member. (Input_arguments::Input_arguments): Initialize file_count_. (Input_arguments::add_file): Remove const. (Input_arguments::number_of_input_files): New function. (Input_arguments::file_count_): New data member. (Command_line::number_of_input_files): Call Input_arguments::number_of_input_files. * output.cc (Output_segment_headers::Output_segment_headers): Set current size. (Output_section::Input_section::current_data_size): New function. (Output_section::Output_section): Initialize new data members. (Output_section::add_input_section): Don't do merge sections for an incremental link; allocate space from free list for an incremental update. (Output_section::add_output_section_data): Allocate space from free list for an incremental update. (Output_section::update_data_size): New function. (Output_section::set_fixed_layout): New function. (Output_section::reserve): New function. (Output_segment::set_section_addresses): Remove const. (Output_segment::set_section_list_addresses): Remove const; allocate space from free list for an incremental update. (Output_segment::set_offset): Adjust size of RELRO segment for an incremental update. * output.h (Output_data::current_data_size): Move here from child classes. (Output_data::pre_finalize_data_size): New function. (Output_data::update_data_size): New function. (Output_section_headers::update_data_size): new function. (Output_section_data_build::current_data_size): Move to Output_data. (Output_data_strtab::update_data_size): New function. (Output_section::current_data_size): Move to Output_data. (Output_section::set_fixed_layout): New function. (Output_section::has_fixed_layout): New function. (Output_section::reserve): New function. (Output_section::update_data_size): New function. (Output_section::has_fixed_layout_): New data member. (Output_section::free_list_): New data member. (Output_segment::set_section_addresses): Remove const. (Output_segment::set_section_list_addresses): Remove const. * plugin.cc (Sized_pluginobj::do_for_all_local_got_entries): New function. * plugin.h (Sized_pluginobj::do_for_all_local_got_entries): New function. * readsyms.cc (Read_symbols::do_read_symbols): Add library parameter when calling Add_symbols constructor; store argument serial number for members of a lib group. (Add_symbols::locks): Allow case where token == NULL. (Add_symbols::run): Report libraries denoted by --start-lib/--end-lib. (Read_member::~Read_member): New function. (Read_member::is_runnable): New function. (Read_member::locks): New function. (Read_member::run): New function. (Check_script::~Check_script): New function. (Check_script::is_runnable): New function. (Check_script::locks): New function. (Check_script::run): New function. (Check_library::~Check_library): New function. (Check_library::is_runnable): New function. (Check_library::locks): New function. (Check_library::run): New function. * readsyms.h (Add_symbols::Add_symbols): Add library parameter. (Add_symbols::library_): New data member. (class Read_member): New class. (class Check_script): New class. (class Check_library): New class. * reloc.cc (Read_relocs::is_runnable): Allow case where token == NULL. (Read_relocs::locks): Likewise. (Scan_relocs::locks): Likewise. (Relocate_task::locks): Likewise. (Sized_relobj::do_scan_relocs): Tell finalize_incremental_relocs to clear counters. (Sized_relobj::incremental_relocs_scan): Fix comment. (Sized_relobj::do_relocate): Pass output file offset to write_local_symbols. (Sized_relobj::incremental_relocs_write_reltype): Use reloc_size from class declaration. * script.cc (read_input_script): Allocate Script_info; pass argument serial number to report_script. * script.h (class Script_info): Move to incremental.h. * symtab.cc (Symbol_table::add_from_incrobj): New function. * symtab.h (Symbol_table::add_from_incrobj): New function. (Symbol_table::set_file_offset): New function.
657 lines
18 KiB
C++
657 lines
18 KiB
C++
// dynobj.h -- dynamic object support for gold -*- C++ -*-
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// Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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// Written by Ian Lance Taylor <iant@google.com>.
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// This file is part of gold.
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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// MA 02110-1301, USA.
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#ifndef GOLD_DYNOBJ_H
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#define GOLD_DYNOBJ_H
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#include <vector>
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#include "stringpool.h"
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#include "object.h"
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namespace gold
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{
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class Version_script_info;
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// A dynamic object (ET_DYN). This is an abstract base class itself.
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// The implementations is the template class Sized_dynobj.
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class Dynobj : public Object
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{
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public:
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// We keep a list of all the DT_NEEDED entries we find.
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typedef std::vector<std::string> Needed;
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Dynobj(const std::string& name, Input_file* input_file, off_t offset = 0);
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// Return the name to use in a DT_NEEDED entry for this object.
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const char*
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soname() const
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{ return this->soname_.c_str(); }
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// Return the list of DT_NEEDED strings.
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const Needed&
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needed() const
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{ return this->needed_; }
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// Return whether this dynamic object has any DT_NEEDED entries
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// which were not seen during the link.
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bool
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has_unknown_needed_entries() const
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{
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gold_assert(this->unknown_needed_ != UNKNOWN_NEEDED_UNSET);
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return this->unknown_needed_ == UNKNOWN_NEEDED_TRUE;
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}
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// Set whether this dynamic object has any DT_NEEDED entries which
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// were not seen during the link.
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void
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set_has_unknown_needed_entries(bool set)
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{
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gold_assert(this->unknown_needed_ == UNKNOWN_NEEDED_UNSET);
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this->unknown_needed_ = set ? UNKNOWN_NEEDED_TRUE : UNKNOWN_NEEDED_FALSE;
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}
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// Compute the ELF hash code for a string.
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static uint32_t
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elf_hash(const char*);
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// Create a standard ELF hash table, setting *PPHASH and *PHASHLEN.
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// DYNSYMS is the global dynamic symbols. LOCAL_DYNSYM_COUNT is the
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// number of local dynamic symbols, which is the index of the first
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// dynamic gobal symbol.
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static void
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create_elf_hash_table(const std::vector<Symbol*>& dynsyms,
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unsigned int local_dynsym_count,
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unsigned char** pphash,
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unsigned int* phashlen);
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// Create a GNU hash table, setting *PPHASH and *PHASHLEN. DYNSYMS
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// is the global dynamic symbols. LOCAL_DYNSYM_COUNT is the number
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// of local dynamic symbols, which is the index of the first dynamic
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// gobal symbol.
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static void
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create_gnu_hash_table(const std::vector<Symbol*>& dynsyms,
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unsigned int local_dynsym_count,
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unsigned char** pphash, unsigned int* phashlen);
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protected:
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// Set the DT_SONAME string.
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void
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set_soname_string(const char* s)
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{ this->soname_.assign(s); }
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// Add an entry to the list of DT_NEEDED strings.
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void
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add_needed(const char* s)
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{ this->needed_.push_back(std::string(s)); }
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private:
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// Compute the GNU hash code for a string.
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static uint32_t
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gnu_hash(const char*);
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// Compute the number of hash buckets to use.
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static unsigned int
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compute_bucket_count(const std::vector<uint32_t>& hashcodes,
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bool for_gnu_hash_table);
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// Sized version of create_elf_hash_table.
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template<bool big_endian>
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static void
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sized_create_elf_hash_table(const std::vector<uint32_t>& bucket,
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const std::vector<uint32_t>& chain,
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unsigned char* phash,
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unsigned int hashlen);
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// Sized version of create_gnu_hash_table.
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template<int size, bool big_endian>
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static void
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sized_create_gnu_hash_table(const std::vector<Symbol*>& hashed_dynsyms,
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const std::vector<uint32_t>& dynsym_hashvals,
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unsigned int unhashed_dynsym_count,
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unsigned char** pphash,
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unsigned int* phashlen);
|
|
|
|
// Values for the has_unknown_needed_entries_ field.
|
|
enum Unknown_needed
|
|
{
|
|
UNKNOWN_NEEDED_UNSET,
|
|
UNKNOWN_NEEDED_TRUE,
|
|
UNKNOWN_NEEDED_FALSE
|
|
};
|
|
|
|
// The DT_SONAME name, if any.
|
|
std::string soname_;
|
|
// The list of DT_NEEDED entries.
|
|
Needed needed_;
|
|
// Whether this dynamic object has any DT_NEEDED entries not seen
|
|
// during the link.
|
|
Unknown_needed unknown_needed_;
|
|
};
|
|
|
|
// A dynamic object, size and endian specific version.
|
|
|
|
template<int size, bool big_endian>
|
|
class Sized_dynobj : public Dynobj
|
|
{
|
|
public:
|
|
typedef typename Sized_relobj<size, big_endian>::Symbols Symbols;
|
|
|
|
Sized_dynobj(const std::string& name, Input_file* input_file, off_t offset,
|
|
const typename elfcpp::Ehdr<size, big_endian>&);
|
|
|
|
// Set up the object file based on TARGET.
|
|
void
|
|
setup();
|
|
|
|
// Read the symbols.
|
|
void
|
|
do_read_symbols(Read_symbols_data*);
|
|
|
|
// Lay out the input sections.
|
|
void
|
|
do_layout(Symbol_table*, Layout*, Read_symbols_data*);
|
|
|
|
// Add the symbols to the symbol table.
|
|
void
|
|
do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*);
|
|
|
|
Archive::Should_include
|
|
do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*,
|
|
std::string* why);
|
|
|
|
// Iterate over global symbols, calling a visitor class V for each.
|
|
void
|
|
do_for_all_global_symbols(Read_symbols_data* sd,
|
|
Library_base::Symbol_visitor_base* v);
|
|
|
|
// Iterate over local symbols, calling a visitor class V for each GOT offset
|
|
// associated with a local symbol.
|
|
void
|
|
do_for_all_local_got_entries(Got_offset_list::Visitor* v) const;
|
|
|
|
// Get the size of a section.
|
|
uint64_t
|
|
do_section_size(unsigned int shndx)
|
|
{ return this->elf_file_.section_size(shndx); }
|
|
|
|
// Get the name of a section.
|
|
std::string
|
|
do_section_name(unsigned int shndx)
|
|
{ return this->elf_file_.section_name(shndx); }
|
|
|
|
// Return a view of the contents of a section. Set *PLEN to the
|
|
// size.
|
|
Object::Location
|
|
do_section_contents(unsigned int shndx)
|
|
{ return this->elf_file_.section_contents(shndx); }
|
|
|
|
// Return section flags.
|
|
uint64_t
|
|
do_section_flags(unsigned int shndx)
|
|
{ return this->elf_file_.section_flags(shndx); }
|
|
|
|
// Not used for dynobj.
|
|
uint64_t
|
|
do_section_entsize(unsigned int )
|
|
{ gold_unreachable(); }
|
|
|
|
// Return section address.
|
|
uint64_t
|
|
do_section_address(unsigned int shndx)
|
|
{ return this->elf_file_.section_addr(shndx); }
|
|
|
|
// Return section type.
|
|
unsigned int
|
|
do_section_type(unsigned int shndx)
|
|
{ return this->elf_file_.section_type(shndx); }
|
|
|
|
// Return the section link field.
|
|
unsigned int
|
|
do_section_link(unsigned int shndx)
|
|
{ return this->elf_file_.section_link(shndx); }
|
|
|
|
// Return the section link field.
|
|
unsigned int
|
|
do_section_info(unsigned int shndx)
|
|
{ return this->elf_file_.section_info(shndx); }
|
|
|
|
// Return the section alignment.
|
|
uint64_t
|
|
do_section_addralign(unsigned int shndx)
|
|
{ return this->elf_file_.section_addralign(shndx); }
|
|
|
|
// Return the Xindex structure to use.
|
|
Xindex*
|
|
do_initialize_xindex();
|
|
|
|
// Get symbol counts.
|
|
void
|
|
do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const;
|
|
|
|
// Get the global symbols.
|
|
const Symbols*
|
|
do_get_global_symbols() const
|
|
{ return this->symbols_; }
|
|
|
|
private:
|
|
// For convenience.
|
|
typedef Sized_dynobj<size, big_endian> This;
|
|
static const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
|
|
static const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
|
|
static const int dyn_size = elfcpp::Elf_sizes<size>::dyn_size;
|
|
typedef elfcpp::Shdr<size, big_endian> Shdr;
|
|
typedef elfcpp::Dyn<size, big_endian> Dyn;
|
|
|
|
// Adjust a section index if necessary.
|
|
unsigned int
|
|
adjust_shndx(unsigned int shndx)
|
|
{
|
|
if (shndx >= elfcpp::SHN_LORESERVE)
|
|
shndx += this->elf_file_.large_shndx_offset();
|
|
return shndx;
|
|
}
|
|
|
|
// Find the dynamic symbol table and the version sections, given the
|
|
// section headers.
|
|
void
|
|
find_dynsym_sections(const unsigned char* pshdrs,
|
|
unsigned int* pversym_shndx,
|
|
unsigned int* pverdef_shndx,
|
|
unsigned int* pverneed_shndx,
|
|
unsigned int* pdynamic_shndx);
|
|
|
|
// Read the dynamic symbol section SHNDX.
|
|
void
|
|
read_dynsym_section(const unsigned char* pshdrs, unsigned int shndx,
|
|
elfcpp::SHT type, unsigned int link,
|
|
File_view** view, section_size_type* view_size,
|
|
unsigned int* view_info);
|
|
|
|
// Read the dynamic tags.
|
|
void
|
|
read_dynamic(const unsigned char* pshdrs, unsigned int dynamic_shndx,
|
|
unsigned int strtab_shndx, const unsigned char* strtabu,
|
|
off_t strtab_size);
|
|
|
|
// Mapping from version number to version name.
|
|
typedef std::vector<const char*> Version_map;
|
|
|
|
// Create the version map.
|
|
void
|
|
make_version_map(Read_symbols_data* sd, Version_map*) const;
|
|
|
|
// Add version definitions to the version map.
|
|
void
|
|
make_verdef_map(Read_symbols_data* sd, Version_map*) const;
|
|
|
|
// Add version references to the version map.
|
|
void
|
|
make_verneed_map(Read_symbols_data* sd, Version_map*) const;
|
|
|
|
// Add an entry to the version map.
|
|
void
|
|
set_version_map(Version_map*, unsigned int ndx, const char* name) const;
|
|
|
|
// General access to the ELF file.
|
|
elfcpp::Elf_file<size, big_endian, Object> elf_file_;
|
|
// The section index of the dynamic symbol table.
|
|
unsigned int dynsym_shndx_;
|
|
// The entries in the symbol table for the symbols. We only keep
|
|
// this if we need it to print symbol information.
|
|
Symbols* symbols_;
|
|
// Number of defined symbols.
|
|
size_t defined_count_;
|
|
};
|
|
|
|
// A base class for Verdef and Verneed_version which just handles the
|
|
// version index which will be stored in the SHT_GNU_versym section.
|
|
|
|
class Version_base
|
|
{
|
|
public:
|
|
Version_base()
|
|
: index_(-1U)
|
|
{ }
|
|
|
|
virtual
|
|
~Version_base()
|
|
{ }
|
|
|
|
// Return the version index.
|
|
unsigned int
|
|
index() const
|
|
{
|
|
gold_assert(this->index_ != -1U);
|
|
return this->index_;
|
|
}
|
|
|
|
// Set the version index.
|
|
void
|
|
set_index(unsigned int index)
|
|
{
|
|
gold_assert(this->index_ == -1U);
|
|
this->index_ = index;
|
|
}
|
|
|
|
// Clear the weak flag in a version definition.
|
|
virtual void
|
|
clear_weak() = 0;
|
|
|
|
private:
|
|
Version_base(const Version_base&);
|
|
Version_base& operator=(const Version_base&);
|
|
|
|
// The index of the version definition or reference.
|
|
unsigned int index_;
|
|
};
|
|
|
|
// This class handles a version being defined in the file we are
|
|
// generating.
|
|
|
|
class Verdef : public Version_base
|
|
{
|
|
public:
|
|
Verdef(const char* name, const std::vector<std::string>& deps,
|
|
bool is_base, bool is_weak, bool is_info, bool is_symbol_created)
|
|
: name_(name), deps_(deps), is_base_(is_base), is_weak_(is_weak),
|
|
is_info_(is_info), is_symbol_created_(is_symbol_created)
|
|
{ }
|
|
|
|
// Return the version name.
|
|
const char*
|
|
name() const
|
|
{ return this->name_; }
|
|
|
|
// Return the number of dependencies.
|
|
unsigned int
|
|
count_dependencies() const
|
|
{ return this->deps_.size(); }
|
|
|
|
// Add a dependency to this version. The NAME should be
|
|
// canonicalized in the dynamic Stringpool.
|
|
void
|
|
add_dependency(const char* name)
|
|
{ this->deps_.push_back(name); }
|
|
|
|
// Return whether this definition is weak.
|
|
bool
|
|
is_weak() const
|
|
{ return this->is_weak_; }
|
|
|
|
// Clear the weak flag.
|
|
void
|
|
clear_weak()
|
|
{ this->is_weak_ = false; }
|
|
|
|
// Return whether this definition is informational.
|
|
bool
|
|
is_info() const
|
|
{ return this->is_info_; }
|
|
|
|
// Return whether a version symbol has been created for this
|
|
// definition.
|
|
bool
|
|
is_symbol_created() const
|
|
{ return this->is_symbol_created_; }
|
|
|
|
// Write contents to buffer.
|
|
template<int size, bool big_endian>
|
|
unsigned char*
|
|
write(const Stringpool*, bool is_last, unsigned char*) const;
|
|
|
|
private:
|
|
Verdef(const Verdef&);
|
|
Verdef& operator=(const Verdef&);
|
|
|
|
// The type of the list of version dependencies. Each dependency
|
|
// should be canonicalized in the dynamic Stringpool.
|
|
typedef std::vector<std::string> Deps;
|
|
|
|
// The name of this version. This should be canonicalized in the
|
|
// dynamic Stringpool.
|
|
const char* name_;
|
|
// A list of other versions which this version depends upon.
|
|
Deps deps_;
|
|
// Whether this is the base version.
|
|
bool is_base_;
|
|
// Whether this version is weak.
|
|
bool is_weak_;
|
|
// Whether this version is informational.
|
|
bool is_info_;
|
|
// Whether a version symbol has been created.
|
|
bool is_symbol_created_;
|
|
};
|
|
|
|
// A referened version. This will be associated with a filename by
|
|
// Verneed.
|
|
|
|
class Verneed_version : public Version_base
|
|
{
|
|
public:
|
|
Verneed_version(const char* version)
|
|
: version_(version)
|
|
{ }
|
|
|
|
// Return the version name.
|
|
const char*
|
|
version() const
|
|
{ return this->version_; }
|
|
|
|
// Clear the weak flag. This is invalid for a reference.
|
|
void
|
|
clear_weak()
|
|
{ gold_unreachable(); }
|
|
|
|
private:
|
|
Verneed_version(const Verneed_version&);
|
|
Verneed_version& operator=(const Verneed_version&);
|
|
|
|
const char* version_;
|
|
};
|
|
|
|
// Version references in a single dynamic object.
|
|
|
|
class Verneed
|
|
{
|
|
public:
|
|
Verneed(const char* filename)
|
|
: filename_(filename), need_versions_()
|
|
{ }
|
|
|
|
~Verneed();
|
|
|
|
// Return the file name.
|
|
const char*
|
|
filename() const
|
|
{ return this->filename_; }
|
|
|
|
// Return the number of versions.
|
|
unsigned int
|
|
count_versions() const
|
|
{ return this->need_versions_.size(); }
|
|
|
|
// Add a version name. The name should be canonicalized in the
|
|
// dynamic Stringpool. If the name is already present, this does
|
|
// nothing.
|
|
Verneed_version*
|
|
add_name(const char* name);
|
|
|
|
// Set the version indexes, starting at INDEX. Return the updated
|
|
// INDEX.
|
|
unsigned int
|
|
finalize(unsigned int index);
|
|
|
|
// Write contents to buffer.
|
|
template<int size, bool big_endian>
|
|
unsigned char*
|
|
write(const Stringpool*, bool is_last, unsigned char*) const;
|
|
|
|
private:
|
|
Verneed(const Verneed&);
|
|
Verneed& operator=(const Verneed&);
|
|
|
|
// The type of the list of version names. Each name should be
|
|
// canonicalized in the dynamic Stringpool.
|
|
typedef std::vector<Verneed_version*> Need_versions;
|
|
|
|
// The filename of the dynamic object. This should be
|
|
// canonicalized in the dynamic Stringpool.
|
|
const char* filename_;
|
|
// The list of version names.
|
|
Need_versions need_versions_;
|
|
};
|
|
|
|
// This class handles version definitions and references which go into
|
|
// the output file.
|
|
|
|
class Versions
|
|
{
|
|
public:
|
|
Versions(const Version_script_info&, Stringpool*);
|
|
|
|
~Versions();
|
|
|
|
// SYM is going into the dynamic symbol table and has a version.
|
|
// Record the appropriate version information.
|
|
void
|
|
record_version(const Symbol_table* symtab, Stringpool*, const Symbol* sym);
|
|
|
|
// Set the version indexes. DYNSYM_INDEX is the index we should use
|
|
// for the next dynamic symbol. We add new dynamic symbols to SYMS
|
|
// and return an updated DYNSYM_INDEX.
|
|
unsigned int
|
|
finalize(Symbol_table* symtab, unsigned int dynsym_index,
|
|
std::vector<Symbol*>* syms);
|
|
|
|
// Return whether there are any version definitions.
|
|
bool
|
|
any_defs() const
|
|
{ return !this->defs_.empty(); }
|
|
|
|
// Return whether there are any version references.
|
|
bool
|
|
any_needs() const
|
|
{ return !this->needs_.empty(); }
|
|
|
|
// Build an allocated buffer holding the contents of the symbol
|
|
// version section (.gnu.version).
|
|
template<int size, bool big_endian>
|
|
void
|
|
symbol_section_contents(const Symbol_table*, const Stringpool*,
|
|
unsigned int local_symcount,
|
|
const std::vector<Symbol*>& syms,
|
|
unsigned char**, unsigned int*) const;
|
|
|
|
// Build an allocated buffer holding the contents of the version
|
|
// definition section (.gnu.version_d).
|
|
template<int size, bool big_endian>
|
|
void
|
|
def_section_contents(const Stringpool*, unsigned char**,
|
|
unsigned int* psize, unsigned int* pentries) const;
|
|
|
|
// Build an allocated buffer holding the contents of the version
|
|
// reference section (.gnu.version_r).
|
|
template<int size, bool big_endian>
|
|
void
|
|
need_section_contents(const Stringpool*, unsigned char**,
|
|
unsigned int* psize, unsigned int* pentries) const;
|
|
|
|
const Version_script_info&
|
|
version_script() const
|
|
{ return this->version_script_; }
|
|
|
|
private:
|
|
Versions(const Versions&);
|
|
Versions& operator=(const Versions&);
|
|
|
|
// The type of the list of version definitions.
|
|
typedef std::vector<Verdef*> Defs;
|
|
|
|
// The type of the list of version references.
|
|
typedef std::vector<Verneed*> Needs;
|
|
|
|
// Handle a symbol SYM defined with version VERSION.
|
|
void
|
|
add_def(const Symbol* sym, const char* version, Stringpool::Key);
|
|
|
|
// Add a reference to version NAME in file FILENAME.
|
|
void
|
|
add_need(Stringpool*, const char* filename, const char* name,
|
|
Stringpool::Key);
|
|
|
|
// Get the dynamic object to use for SYM.
|
|
Dynobj*
|
|
get_dynobj_for_sym(const Symbol_table*, const Symbol* sym) const;
|
|
|
|
// Return the version index to use for SYM.
|
|
unsigned int
|
|
version_index(const Symbol_table*, const Stringpool*,
|
|
const Symbol* sym) const;
|
|
|
|
// Define the base version of a shared library.
|
|
void
|
|
define_base_version(Stringpool* dynpool);
|
|
|
|
// We keep a hash table mapping canonicalized name/version pairs to
|
|
// a version base.
|
|
typedef std::pair<Stringpool::Key, Stringpool::Key> Key;
|
|
|
|
struct Version_table_hash
|
|
{
|
|
size_t
|
|
operator()(const Key& k) const
|
|
{ return k.first + k.second; }
|
|
};
|
|
|
|
struct Version_table_eq
|
|
{
|
|
bool
|
|
operator()(const Key& k1, const Key& k2) const
|
|
{ return k1.first == k2.first && k1.second == k2.second; }
|
|
};
|
|
|
|
typedef Unordered_map<Key, Version_base*, Version_table_hash,
|
|
Version_table_eq> Version_table;
|
|
|
|
// The version definitions.
|
|
Defs defs_;
|
|
// The version references.
|
|
Needs needs_;
|
|
// The mapping from a canonicalized version/filename pair to a
|
|
// version index. The filename may be NULL.
|
|
Version_table version_table_;
|
|
// Whether the version indexes have been set.
|
|
bool is_finalized_;
|
|
// Contents of --version-script, if passed, or NULL.
|
|
const Version_script_info& version_script_;
|
|
// Whether we need to insert a base version. This is only used for
|
|
// shared libaries and is cleared when the base version is defined.
|
|
bool needs_base_version_;
|
|
};
|
|
|
|
} // End namespace gold.
|
|
|
|
#endif // !defined(GOLD_DYNOBJ_H)
|