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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.
587 lines
18 KiB
C++
587 lines
18 KiB
C++
// script.h -- handle linker scripts 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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// We implement a subset of the original GNU ld linker script language
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// for compatibility. The goal is not to implement the entire
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// language. It is merely to implement enough to handle common uses.
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// In particular we need to handle /usr/lib/libc.so on a typical
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// GNU/Linux system, and we want to handle linker scripts used by the
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// Linux kernel build.
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#ifndef GOLD_SCRIPT_H
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#define GOLD_SCRIPT_H
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#include <cstdio>
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#include <string>
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#include <vector>
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#include "script-sections.h"
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namespace gold
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{
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class General_options;
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class Command_line;
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class Symbol_table;
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class Layout;
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class Mapfile;
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class Input_argument;
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class Input_arguments;
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class Input_objects;
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class Input_group;
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class Input_file;
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class Output_segment;
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class Task_token;
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class Workqueue;
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struct Version_dependency_list;
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struct Version_expression_list;
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struct Version_tree;
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struct Version_expression;
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class Lazy_demangler;
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class Incremental_script_entry;
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// This class represents an expression in a linker script.
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class Expression
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{
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protected:
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// These should only be created by child classes.
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Expression()
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{ }
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public:
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virtual ~Expression()
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{ }
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// Return the value of the expression which is not permitted to
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// refer to the dot symbol. CHECK_ASSERTIONS is true if we should
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// check whether assertions are true.
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uint64_t
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eval(const Symbol_table*, const Layout*, bool check_assertions);
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// Return the value of an expression which is permitted to refer to
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// the dot symbol. DOT_VALUE is the absolute value of the dot
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// symbol. DOT_SECTION is the section in which dot is defined; it
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// should be NULL if the dot symbol has an absolute value (e.g., is
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// defined in a SECTIONS clause outside of any output section
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// definition). This sets *RESULT_SECTION to indicate where the
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// value is defined. If the value is absolute *RESULT_SECTION will
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// be NULL. Note that the returned value is still an absolute
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// value; to get a section relative value the caller must subtract
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// the section address. If RESULT_ALIGNMENT is not NULL, this sets
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// *RESULT_ALIGNMENT to the alignment of the value of that alignment
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// is larger than *RESULT_ALIGNMENT; this will only be non-zero if
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// this is an ALIGN expression.
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uint64_t
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eval_with_dot(const Symbol_table*, const Layout*, bool check_assertions,
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uint64_t dot_value, Output_section* dot_section,
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Output_section** result_section, uint64_t* result_alignment);
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// Return the value of an expression which may or may not be
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// permitted to refer to the dot symbol, depending on
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// is_dot_available.
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uint64_t
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eval_maybe_dot(const Symbol_table*, const Layout*, bool check_assertions,
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bool is_dot_available, uint64_t dot_value,
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Output_section* dot_section,
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Output_section** result_section, uint64_t* result_alignment);
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// Print the expression to the FILE. This is for debugging.
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virtual void
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print(FILE*) const = 0;
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protected:
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struct Expression_eval_info;
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public:
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// Compute the value of the expression (implemented by child class).
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// This is public rather than protected because it is called
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// directly by children of Expression on other Expression objects.
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virtual uint64_t
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value(const Expression_eval_info*) = 0;
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private:
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// May not be copied.
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Expression(const Expression&);
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Expression& operator=(const Expression&);
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};
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// Version_script_info stores information parsed from the version
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// script, either provided by --version-script or as part of a linker
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// script. A single Version_script_info object per target is owned by
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// Script_options.
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class Version_script_info
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{
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public:
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// The languages which can be specified in a versionn script.
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enum Language
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{
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LANGUAGE_C, // No demangling.
|
|
LANGUAGE_CXX, // C++ demangling.
|
|
LANGUAGE_JAVA, // Java demangling.
|
|
LANGUAGE_COUNT
|
|
};
|
|
|
|
Version_script_info();
|
|
|
|
~Version_script_info();
|
|
|
|
// Clear everything.
|
|
void
|
|
clear();
|
|
|
|
// Finalize the version control information.
|
|
void
|
|
finalize();
|
|
|
|
// Return whether the information is finalized.
|
|
bool
|
|
is_finalized() const
|
|
{ return this->is_finalized_; }
|
|
|
|
// Return whether any version were defined in the version script.
|
|
bool
|
|
empty() const
|
|
{ return this->version_trees_.empty(); }
|
|
|
|
// If there is a version associated with SYMBOL, return true, and
|
|
// set *VERSION to the version, and *IS_GLOBAL to whether the symbol
|
|
// should be global. Otherwise, return false.
|
|
bool
|
|
get_symbol_version(const char* symbol, std::string* version,
|
|
bool* is_global) const;
|
|
|
|
// Return whether this symbol matches the local: section of some
|
|
// version.
|
|
bool
|
|
symbol_is_local(const char* symbol) const
|
|
{
|
|
bool is_global;
|
|
return (this->get_symbol_version(symbol, NULL, &is_global)
|
|
&& !is_global);
|
|
}
|
|
|
|
// Return the names of versions defined in the version script.
|
|
std::vector<std::string>
|
|
get_versions() const;
|
|
|
|
// Return the list of dependencies for this version.
|
|
std::vector<std::string>
|
|
get_dependencies(const char* version) const;
|
|
|
|
// The following functions should only be used by the bison helper
|
|
// functions. They allocate new structs whose memory belongs to
|
|
// Version_script_info. The bison functions copy the information
|
|
// from the version script into these structs.
|
|
struct Version_dependency_list*
|
|
allocate_dependency_list();
|
|
|
|
struct Version_expression_list*
|
|
allocate_expression_list();
|
|
|
|
struct Version_tree*
|
|
allocate_version_tree();
|
|
|
|
// Build the lookup tables after all data have been read.
|
|
void
|
|
build_lookup_tables();
|
|
|
|
// Give an error if there are any unmatched names in the version
|
|
// script.
|
|
void
|
|
check_unmatched_names(const Symbol_table*) const;
|
|
|
|
// Print contents to the FILE. This is for debugging.
|
|
void
|
|
print(FILE*) const;
|
|
|
|
private:
|
|
void
|
|
print_expression_list(FILE* f, const Version_expression_list*) const;
|
|
|
|
bool
|
|
get_symbol_version_helper(const char* symbol,
|
|
bool check_global,
|
|
std::string* pversion) const;
|
|
|
|
// Fast lookup information for a given language.
|
|
|
|
// We map from exact match strings to Version_tree's. Historically
|
|
// version scripts sometimes have the same symbol multiple times,
|
|
// which is ambiguous. We warn about that case by storing the
|
|
// second Version_tree we see.
|
|
struct Version_tree_match
|
|
{
|
|
Version_tree_match(const Version_tree* r, bool ig,
|
|
const Version_expression* e)
|
|
: real(r), is_global(ig), expression(e), ambiguous(NULL)
|
|
{ }
|
|
|
|
// The Version_tree that we return.
|
|
const Version_tree* real;
|
|
// True if this is a global match for the REAL member, false if it
|
|
// is a local match.
|
|
bool is_global;
|
|
// Point back to the Version_expression for which we created this
|
|
// match.
|
|
const Version_expression* expression;
|
|
// If not NULL, another Version_tree that defines the symbol.
|
|
const Version_tree* ambiguous;
|
|
};
|
|
|
|
// Map from an exact match string to a Version_tree.
|
|
|
|
typedef Unordered_map<std::string, Version_tree_match> Exact;
|
|
|
|
// Fast lookup information for a glob pattern.
|
|
struct Glob
|
|
{
|
|
Glob()
|
|
: expression(NULL), version(NULL), is_global(false)
|
|
{ }
|
|
|
|
Glob(const Version_expression* e, const Version_tree* v, bool ig)
|
|
: expression(e), version(v), is_global(ig)
|
|
{ }
|
|
|
|
// A pointer to the version expression holding the pattern to
|
|
// match and the language to use for demangling the symbol before
|
|
// doing the match.
|
|
const Version_expression* expression;
|
|
// The Version_tree we use if this pattern matches.
|
|
const Version_tree* version;
|
|
// True if this is a global symbol.
|
|
bool is_global;
|
|
};
|
|
|
|
typedef std::vector<Glob> Globs;
|
|
|
|
bool
|
|
unquote(std::string*) const;
|
|
|
|
void
|
|
add_exact_match(const std::string&, const Version_tree*, bool is_global,
|
|
const Version_expression*, Exact*);
|
|
|
|
void
|
|
build_expression_list_lookup(const Version_expression_list*,
|
|
const Version_tree*, bool);
|
|
|
|
const char*
|
|
get_name_to_match(const char*, int,
|
|
Lazy_demangler*, Lazy_demangler*) const;
|
|
|
|
// All the version dependencies we allocate.
|
|
std::vector<Version_dependency_list*> dependency_lists_;
|
|
// All the version expressions we allocate.
|
|
std::vector<Version_expression_list*> expression_lists_;
|
|
// The list of versions.
|
|
std::vector<Version_tree*> version_trees_;
|
|
// Exact matches for global symbols, by language.
|
|
Exact* exact_[LANGUAGE_COUNT];
|
|
// A vector of glob patterns mapping to Version_trees.
|
|
Globs globs_;
|
|
// The default version to use, if there is one. This is from a
|
|
// pattern of "*".
|
|
const Version_tree* default_version_;
|
|
// True if the default version is global.
|
|
bool default_is_global_;
|
|
// Whether this has been finalized.
|
|
bool is_finalized_;
|
|
};
|
|
|
|
// This class manages assignments to symbols. These can appear in
|
|
// three different locations in scripts: outside of a SECTIONS clause,
|
|
// within a SECTIONS clause, and within an output section definition
|
|
// within a SECTIONS clause. This can also appear on the command line
|
|
// via the --defsym command line option.
|
|
|
|
class Symbol_assignment
|
|
{
|
|
public:
|
|
Symbol_assignment(const char* name, size_t namelen, bool is_defsym,
|
|
Expression* val, bool provide, bool hidden)
|
|
: name_(name, namelen), val_(val), is_defsym_(is_defsym),
|
|
provide_(provide), hidden_(hidden), sym_(NULL)
|
|
{ }
|
|
|
|
// Add the symbol to the symbol table.
|
|
void
|
|
add_to_table(Symbol_table*);
|
|
|
|
// Finalize the symbol value.
|
|
void
|
|
finalize(Symbol_table*, const Layout*);
|
|
|
|
// Finalize the symbol value when it can refer to the dot symbol.
|
|
void
|
|
finalize_with_dot(Symbol_table*, const Layout*, uint64_t dot_value,
|
|
Output_section* dot_section);
|
|
|
|
// Set the symbol value, but only if the value is absolute. This is
|
|
// used while processing a SECTIONS clause. We assume that dot is
|
|
// an absolute value here. We do not check assertions.
|
|
void
|
|
set_if_absolute(Symbol_table*, const Layout*, bool is_dot_available,
|
|
uint64_t dot_value);
|
|
|
|
const std::string&
|
|
name() const
|
|
{ return this->name_; }
|
|
|
|
// Print the assignment to the FILE. This is for debugging.
|
|
void
|
|
print(FILE*) const;
|
|
|
|
private:
|
|
// Shared by finalize and finalize_with_dot.
|
|
void
|
|
finalize_maybe_dot(Symbol_table*, const Layout*, bool is_dot_available,
|
|
uint64_t dot_value, Output_section* dot_section);
|
|
|
|
// Sized version of finalize.
|
|
template<int size>
|
|
void
|
|
sized_finalize(Symbol_table*, const Layout*, bool is_dot_available,
|
|
uint64_t dot_value, Output_section*);
|
|
|
|
// Symbol name.
|
|
std::string name_;
|
|
// Expression to assign to symbol.
|
|
Expression* val_;
|
|
// True if this symbol is defined by a --defsym, false if it is
|
|
// defined in a linker script.
|
|
bool is_defsym_;
|
|
// Whether the assignment should be provided (only set if there is
|
|
// an undefined reference to the symbol.
|
|
bool provide_;
|
|
// Whether the assignment should be hidden.
|
|
bool hidden_;
|
|
// The entry in the symbol table.
|
|
Symbol* sym_;
|
|
};
|
|
|
|
// This class manages assertions in linker scripts. These can appear
|
|
// in all the places where a Symbol_assignment can appear.
|
|
|
|
class Script_assertion
|
|
{
|
|
public:
|
|
Script_assertion(Expression* check, const char* message,
|
|
size_t messagelen)
|
|
: check_(check), message_(message, messagelen)
|
|
{ }
|
|
|
|
// Check the assertion.
|
|
void
|
|
check(const Symbol_table*, const Layout*);
|
|
|
|
// Print the assertion to the FILE. This is for debugging.
|
|
void
|
|
print(FILE*) const;
|
|
|
|
private:
|
|
// The expression to check.
|
|
Expression* check_;
|
|
// The message to issue if the expression fails.
|
|
std::string message_;
|
|
};
|
|
|
|
// We can read a linker script in two different contexts: when
|
|
// initially parsing the command line, and when we find an input file
|
|
// which is actually a linker script. Also some of the data which can
|
|
// be set by a linker script can also be set via command line options
|
|
// like -e and --defsym. This means that we have a type of data which
|
|
// can be set both during command line option parsing and while
|
|
// reading input files. We store that data in an instance of this
|
|
// object. We will keep pointers to that instance in both the
|
|
// Command_line and Layout objects.
|
|
|
|
class Script_options
|
|
{
|
|
public:
|
|
Script_options();
|
|
|
|
// Add a symbol to be defined.
|
|
void
|
|
add_symbol_assignment(const char* name, size_t length, bool is_defsym,
|
|
Expression* value, bool provide, bool hidden);
|
|
|
|
// Look for an assigned symbol.
|
|
bool
|
|
is_pending_assignment(const char* name);
|
|
|
|
// Add a reference to a symbol.
|
|
void
|
|
add_symbol_reference(const char* name, size_t length);
|
|
|
|
// Add an assertion.
|
|
void
|
|
add_assertion(Expression* check, const char* message, size_t messagelen);
|
|
|
|
// Define a symbol from the command line.
|
|
bool
|
|
define_symbol(const char* definition);
|
|
|
|
// Create sections required by any linker scripts.
|
|
void
|
|
create_script_sections(Layout*);
|
|
|
|
// Add all symbol definitions to the symbol table.
|
|
void
|
|
add_symbols_to_table(Symbol_table*);
|
|
|
|
// Used to iterate over symbols which are referenced in expressions
|
|
// but not defined.
|
|
typedef Unordered_set<std::string>::const_iterator referenced_const_iterator;
|
|
|
|
referenced_const_iterator
|
|
referenced_begin() const
|
|
{ return this->symbol_references_.begin(); }
|
|
|
|
referenced_const_iterator
|
|
referenced_end() const
|
|
{ return this->symbol_references_.end(); }
|
|
|
|
// Return whether a symbol is referenced but not defined.
|
|
bool
|
|
is_referenced(const std::string& name) const
|
|
{
|
|
return (this->symbol_references_.find(name)
|
|
!= this->symbol_references_.end());
|
|
}
|
|
|
|
// Return whether there are any symbols which were referenced but
|
|
// not defined.
|
|
bool
|
|
any_unreferenced() const
|
|
{ return !this->symbol_references_.empty(); }
|
|
|
|
// Finalize the symbol values. Also check assertions.
|
|
void
|
|
finalize_symbols(Symbol_table*, const Layout*);
|
|
|
|
// Version information parsed from a version script. Everything
|
|
// else has a pointer to this object.
|
|
Version_script_info*
|
|
version_script_info()
|
|
{ return &this->version_script_info_; }
|
|
|
|
const Version_script_info*
|
|
version_script_info() const
|
|
{ return &this->version_script_info_; }
|
|
|
|
// A SECTIONS clause parsed from a linker script. Everything else
|
|
// has a pointer to this object.
|
|
Script_sections*
|
|
script_sections()
|
|
{ return &this->script_sections_; }
|
|
|
|
const Script_sections*
|
|
script_sections() const
|
|
{ return &this->script_sections_; }
|
|
|
|
// Whether we saw a SECTIONS clause.
|
|
bool
|
|
saw_sections_clause() const
|
|
{ return this->script_sections_.saw_sections_clause(); }
|
|
|
|
// Whether we saw a PHDRS clause.
|
|
bool
|
|
saw_phdrs_clause() const
|
|
{ return this->script_sections_.saw_phdrs_clause(); }
|
|
|
|
// Set section addresses using a SECTIONS clause. Return the
|
|
// segment which should hold the file header and segment headers;
|
|
// this may return NULL, in which case the headers are not in a
|
|
// loadable segment.
|
|
Output_segment*
|
|
set_section_addresses(Symbol_table*, Layout*);
|
|
|
|
// Print the script to the FILE. This is for debugging.
|
|
void
|
|
print(FILE*) const;
|
|
|
|
private:
|
|
// We keep a list of symbol assignments which occur outside of a
|
|
// SECTIONS clause.
|
|
typedef std::vector<Symbol_assignment*> Symbol_assignments;
|
|
|
|
// We keep a list of all assertions whcih occur outside of a
|
|
// SECTIONS clause.
|
|
typedef std::vector<Script_assertion*> Assertions;
|
|
|
|
// The entry address. This will be empty if not set.
|
|
std::string entry_;
|
|
// Symbols to set.
|
|
Symbol_assignments symbol_assignments_;
|
|
// Symbols defined in an expression, for faster lookup.
|
|
Unordered_set<std::string> symbol_definitions_;
|
|
// Symbols referenced in an expression.
|
|
Unordered_set<std::string> symbol_references_;
|
|
// Assertions to check.
|
|
Assertions assertions_;
|
|
// Version information parsed from a version script.
|
|
Version_script_info version_script_info_;
|
|
// Information from any SECTIONS clauses.
|
|
Script_sections script_sections_;
|
|
};
|
|
|
|
// FILE was found as an argument on the command line, but was not
|
|
// recognized as an ELF file. Try to read it as a script. Return
|
|
// true if the file was handled. This has to handle /usr/lib/libc.so
|
|
// on a GNU/Linux system. *USED_NEXT_BLOCKER is set to indicate
|
|
// whether the function took over NEXT_BLOCKER.
|
|
|
|
bool
|
|
read_input_script(Workqueue*, Symbol_table*, Layout*, Dirsearch*, int,
|
|
Input_objects*, Mapfile*, Input_group*,
|
|
const Input_argument*, Input_file*,
|
|
Task_token* next_blocker, bool* used_next_blocker);
|
|
|
|
// FILE was found as an argument to --script (-T).
|
|
// Read it as a script, and execute its contents immediately.
|
|
|
|
bool
|
|
read_commandline_script(const char* filename, Command_line* cmdline);
|
|
|
|
// FILE was found as an argument to --version-script. Read it as a
|
|
// version script, and store its contents in
|
|
// cmdline->script_options()->version_script_info().
|
|
|
|
bool
|
|
read_version_script(const char* filename, Command_line* cmdline);
|
|
|
|
// FILENAME was found as an argument to --dynamic-list. Read it as a
|
|
// version script (actually, a versym_node from a version script), and
|
|
// store its contents in DYNAMIC_LIST.
|
|
|
|
bool
|
|
read_dynamic_list(const char* filename, Command_line* cmdline,
|
|
Script_options* dynamic_list);
|
|
|
|
} // End namespace gold.
|
|
|
|
#endif // !defined(GOLD_SCRIPT_H)
|