binutils-gdb/gold/dynobj.h

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// dynobj.h -- dynamic object support for gold -*- C++ -*-
// Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.
#ifndef GOLD_DYNOBJ_H
#define GOLD_DYNOBJ_H
#include <vector>
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#include "stringpool.h"
#include "object.h"
namespace gold
{
class Version_script_info;
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// A dynamic object (ET_DYN). This is an abstract base class itself.
// The implementations is the template class Sized_dynobj.
class Dynobj : public Object
{
public:
// We keep a list of all the DT_NEEDED entries we find.
typedef std::vector<std::string> Needed;
Dynobj(const std::string& name, Input_file* input_file, off_t offset = 0);
// Return the name to use in a DT_NEEDED entry for this object.
const char*
soname() const
{ return this->soname_.c_str(); }
// Return the list of DT_NEEDED strings.
const Needed&
needed() const
{ return this->needed_; }
// Return whether this dynamic object has any DT_NEEDED entries
// which were not seen during the link.
bool
has_unknown_needed_entries() const
{
gold_assert(this->unknown_needed_ != UNKNOWN_NEEDED_UNSET);
return this->unknown_needed_ == UNKNOWN_NEEDED_TRUE;
}
// Set whether this dynamic object has any DT_NEEDED entries which
// were not seen during the link.
void
set_has_unknown_needed_entries(bool set)
{
gold_assert(this->unknown_needed_ == UNKNOWN_NEEDED_UNSET);
this->unknown_needed_ = set ? UNKNOWN_NEEDED_TRUE : UNKNOWN_NEEDED_FALSE;
}
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// Compute the ELF hash code for a string.
static uint32_t
elf_hash(const char*);
// Create a standard ELF hash table, setting *PPHASH and *PHASHLEN.
// DYNSYMS is the global dynamic symbols. LOCAL_DYNSYM_COUNT is the
// number of local dynamic symbols, which is the index of the first
// dynamic gobal symbol.
static void
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create_elf_hash_table(const std::vector<Symbol*>& dynsyms,
unsigned int local_dynsym_count,
unsigned char** pphash,
unsigned int* phashlen);
// Create a GNU hash table, setting *PPHASH and *PHASHLEN. DYNSYMS
// is the global dynamic symbols. LOCAL_DYNSYM_COUNT is the number
// of local dynamic symbols, which is the index of the first dynamic
// gobal symbol.
static void
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create_gnu_hash_table(const std::vector<Symbol*>& dynsyms,
unsigned int local_dynsym_count,
unsigned char** pphash, unsigned int* phashlen);
protected:
// Set the DT_SONAME string.
void
set_soname_string(const char* s)
{ this->soname_.assign(s); }
// Add an entry to the list of DT_NEEDED strings.
void
add_needed(const char* s)
{ this->needed_.push_back(std::string(s)); }
private:
// Compute the GNU hash code for a string.
static uint32_t
gnu_hash(const char*);
// Compute the number of hash buckets to use.
static unsigned int
compute_bucket_count(const std::vector<uint32_t>& hashcodes,
bool for_gnu_hash_table);
// Sized version of create_elf_hash_table.
template<bool big_endian>
static void
sized_create_elf_hash_table(const std::vector<uint32_t>& bucket,
const std::vector<uint32_t>& chain,
unsigned char* phash,
unsigned int hashlen);
// Sized version of create_gnu_hash_table.
template<int size, bool big_endian>
static void
sized_create_gnu_hash_table(const std::vector<Symbol*>& hashed_dynsyms,
const std::vector<uint32_t>& dynsym_hashvals,
unsigned int unhashed_dynsym_count,
unsigned char** pphash,
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:
* cref.cc: New file. * cref.h: New file. * options.h (class General_options): Add --print-symbol-counts. * main.cc (main): Issue defined symbol report if requested. * archive.cc (Archive::interpret_header): Make into a const member function. (Archive::add_symbols): Call Input_objects::archive_start and archive_stop. (Archive::const_iterator): Define new class. (Archive::begin, Archive::end): New functions. (Archive::include_all_members): Rewrite to use iterator. (Archive::count_members): New function. * archive.h (class Archive): Update declarations. (Archive::filename): New function. * object.cc: Include "cref.h". (Sized_relobj::Sized_relobj): Initialize defined_count_. (Sized_relobj::do_get_global_symbol_counts): New function. (Input_objects::add_object): Add object to cross-referencer. (Input_objects::archive_start): New function. (Input_objects::archive_stop): New function. (Input_objects::print_symbol_counts): New function. * object.h: Declare Cref and Archive. (Object::get_global_symbol_counts): New function. (Object::do_get_global_symbol_counts): New pure virtual function. (class Sized_relobj): Add defined_count_ field. Update declarations. (class Input_objects): Add cref_ field. Update constructor. Update declarations. * dynobj.cc (Sized_dynobj::Sized_dynobj): Initialize symbols_ and defined_count_. (Sized_dynobj::do_add_symbols): Allocate symbols_ if printing symbol counts. (Sized_dynobj::do_get_global_symbol_counts): New function. * dynobj.h (class Sized_dynobj): Add fields symbols_ and defined_count_. Update declarations. Define Symbols typedef. * symtab.cc (Symbol_table::add_from_relobj): Add defined parameter. Change all callers. (Symbol_table::add_from_dynobj): Add sympointers and defined parameters. Change all callers. * symtab.h (class Symbol_table): Update declarations. * Makefile.am (CCFILES): Add cref.cc. (HFILES): Add cref.h. * Makefile.in: Rebuild.
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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
* object.h (class Object): Remove target_ field, and target, sized_target, and set_target methods. (Object::sized_target): Remove. (class Sized_relobj): Update declarations. Remove sized_target. * object.cc (Sized_relobj::setup): Remove target parameter. Change all callers. (Input_objects::add_object): Don't do anything with the target. (make_elf_sized_object): Add punconfigured parameter. Change all callers. Set or test parameter target. * dynobj.cc (Sized_dynobj::target): Remove target parameter. Change all callers. * parameters.cc (Parameters::set_target): Change parameter type to be non-const. (Parameters::default_target): Remove. (set_parameters_target): Change parameter type to be non-const. (parameters_force_valid_target): New function. (parameters_clear_target): New function. * parameters.h (class Parameters): Update declarations. Remove default_target method. Add sized_target and clear_target methods. Change target_ to be non-const. (set_parameters_target): Update declaration. (parameters_force_valid_target): Declare. (parameters_clear_target): Declare. * readsyms.cc (Read_symbols::do_read_symbols): Pass punconfigured as NULL if we aren't searching. (Add_symbols::run): Don't check for compatible target. * fileread.cc (Input_file::open_binary): Call parameters_force_valid_target. * gold.cc (queue_middle_tasks): Likewise. * plugin.cc (make_sized_plugin_object): Likewise. Don't call set_target on object. * dynobj.h (class Sized_dynobj): Update declarations. * archive.cc (Archive::get_elf_object_for_member): Return NULL if make_elf_object returns NULL. (Archive::include_member): Don't check whether object target is compatible. * output.cc (Output_section::add_input_section): Get target from parameters. (Output_section::relax_input_section): Likewise. * reloc.cc (Sized_relobj::do_gc_process_relocs): Get target from parameters. (Sized_relobj::do_scan_relocs): Likewise. (Sized_relobj::relocate_sections): Likewise. * resolve.cc (Symbol_table::resolve): Likewise. * symtab.cc (Symbol_table::wrap_symbol): Likewise. Remove object parameter. Change all callers. (Symbol_table::add_from_object): Get target from parameters. (Symbol_table::add_from_relobj): Don't check object target. (Symbol_table::add_from_dynobj): Likewise. (Symbol_table::define_special_symbol): Get target from parameters. * symtab.h (class Symbol_table): Update declaration. * testsuite/binary_unittest.cc (gold_testsuite): Remove target parameter. Change all callers. Clear parameter target. (Binary_test): Test target here. * testsuite/object_unittest.cc (gold_testsuite): Remove target_test_pointer parameter. Change all callers. (Object_test): Test target here.
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setup();
// Read the symbols.
void
do_read_symbols(Read_symbols_data*);
// Lay out the input sections.
void
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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*);
2010-03-22 Rafael Espindola <espindola@google.com> * archive.cc (Should_include): Move to archive.h. (should_include_member): Make it a member of Archive. (Lib_group): New. (Add_lib_group_symbols): New. * archive.h: Include options.h. (Archive_member): Moved from Archive. (Should_include): Moved from archive.cc. (Lib_group): New. (Add_lib_group_symbols): New. * dynobj.cc (do_should_include_member): New. * dynobj.h (do_should_include_member): New. * gold.cc (queue_initial_tasks): Update call to queue. * main.cc (main): Print lib group stats. * object.cc (do_should_include_member): New. * object.h: Include archive.h. (Object::should_include_member): New. (Object::do_should_include_member): New. (Sized_relobj::do_should_include_member): New. * options.cc (General_options::parse_start_lib): New. (General_options::parse_end_lib): New. (Input_arguments::add_file): Handle lib groups. (Input_arguments::start_group): Check we are not in a lib. (Input_arguments::start_lib): New. (Input_arguments::end_lib): New. * options.h (General_options): Add start_lib and end_lib. (Input_argument::lib_): New. (Input_argument::lib): New. (Input_argument::is_lib): New. (Input_file_lib): New. (Input_arguments::in_lib_): New. (Input_arguments::in_lib): New. (Input_arguments::start_lib): New. (Input_arguments::end_lib_): New. * plugin.cc (Pluginobj::get_symbol_resolution_info): Mark symbols in unused members as preempted. (Sized_pluginobj::do_should_include_member): New. * plugin.h (Sized_pluginobj::do_should_include_member): New. * readsyms.cc (Read_symbols::locks): If we are just reading a member, return the blocker. (Read_symbols::do_whole_lib_group): New. (Read_symbols::do_lib_group): New. (Read_symbols::do_read_symbols): Handle lib groups. (Read_symbols::get_name): Handle lib groups. * readsyms.h (Read_symbols): Add an archive member pointer. (Read_symbols::do_whole_lib_group): New. (Read_symbols::do_lib_group): New. (Read_symbols::member_): New. * script.cc (read_input_script): Update call to queue_soon.
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Archive::Should_include
PR 11855 * script.cc (Script_options::Script_options): Initialize symbol_definitions_ and symbol_references_. (Script_options::add_symbol_assignment): Update symbol_definitions_ and symbol_references_. (Script_options::add_symbol_reference): New function. (script_symbol): New function. * script.h (class Script_options): Add symbol_definitions_ and symbol_references_ fields. (Script_options::referenced_const_iterator): New type. (Script_options::referenced_begin): New function. (Script_options::referenced_end): New function. (Script_options::is_referenced): New function. (Script_options::any_unreferenced): New function. * script-c.h (script_symbol): Declare. * yyscript.y (exp): Call script_symbol. * symtab.cc: Include "script.h". (Symbol_table::gc_mark_undef_symbols): Add layout parameter. Change all callers. Check symbols referenced by scripts. (Symbol_table::add_undefined_symbols_from_command_line): Add layout parameter. Change all callers. (Symbol_table::do_add_undefined_symbols_from_command_line): Likewise. Break out loop body. Check symbols referenced by scripts. (Symbol_table::add_undefined_symbol_from_command_line): New function broken out of do_add_undefined_symbols_from_command_line. * symtab.h (class Symbol_table): Update declarations. * archive.cc: Include "layout.h". (Archive::should_include_member): Add layout parameter. Change all callers. Check for symbol mentioned in expression. * archive.h (class Archive): Update declaration. * object.cc (Sized_relobj::do_should_include_member): Add layout parameter. * object.h (Object::should_include_member): Add layout parameter. Change all callers. (Object::do_should_include_member): Add layout parameter. (class Sized_relobj): Update declaration. * dynobj.cc (Sized_dynobj::do_should_include_member): Add layout parameter. * dynobj.h (class Sized_dynobj): Update declaration. * plugin.cc (Sized_pluginobj::do_should_include_member): Add layout parameter. * plugin.h (class Sized_pluginobj): Update declaration.
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do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*,
2010-03-22 Rafael Espindola <espindola@google.com> * archive.cc (Should_include): Move to archive.h. (should_include_member): Make it a member of Archive. (Lib_group): New. (Add_lib_group_symbols): New. * archive.h: Include options.h. (Archive_member): Moved from Archive. (Should_include): Moved from archive.cc. (Lib_group): New. (Add_lib_group_symbols): New. * dynobj.cc (do_should_include_member): New. * dynobj.h (do_should_include_member): New. * gold.cc (queue_initial_tasks): Update call to queue. * main.cc (main): Print lib group stats. * object.cc (do_should_include_member): New. * object.h: Include archive.h. (Object::should_include_member): New. (Object::do_should_include_member): New. (Sized_relobj::do_should_include_member): New. * options.cc (General_options::parse_start_lib): New. (General_options::parse_end_lib): New. (Input_arguments::add_file): Handle lib groups. (Input_arguments::start_group): Check we are not in a lib. (Input_arguments::start_lib): New. (Input_arguments::end_lib): New. * options.h (General_options): Add start_lib and end_lib. (Input_argument::lib_): New. (Input_argument::lib): New. (Input_argument::is_lib): New. (Input_file_lib): New. (Input_arguments::in_lib_): New. (Input_arguments::in_lib): New. (Input_arguments::start_lib): New. (Input_arguments::end_lib_): New. * plugin.cc (Pluginobj::get_symbol_resolution_info): Mark symbols in unused members as preempted. (Sized_pluginobj::do_should_include_member): New. * plugin.h (Sized_pluginobj::do_should_include_member): New. * readsyms.cc (Read_symbols::locks): If we are just reading a member, return the blocker. (Read_symbols::do_whole_lib_group): New. (Read_symbols::do_lib_group): New. (Read_symbols::do_read_symbols): Handle lib groups. (Read_symbols::get_name): Handle lib groups. * readsyms.h (Read_symbols): Add an archive member pointer. (Read_symbols::do_whole_lib_group): New. (Read_symbols::do_lib_group): New. (Read_symbols::member_): New. * script.cc (read_input_script): Update call to queue_soon.
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std::string* why);
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// 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); }
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// Not used for dynobj.
uint64_t
do_section_entsize(unsigned int )
{ gold_unreachable(); }
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// 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); }
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// Return the section alignment.
uint64_t
do_section_addralign(unsigned int shndx)
{ return this->elf_file_.section_addralign(shndx); }
* object.cc (Xindex::initialize_symtab_xindex): New function. (Xindex::read_symtab_xindex): New function. (Xindex::sym_xindex_to_shndx): New function. (Sized_relobj::find_symtab): Pick up SHT_SYMTAB_SHNDX section if available. (Sized_relobj::do_initialize_xindex): New function. (Sized_relobj::do_read_symbols): Adjust section links. (Sized_relobj::symbol_section_and_value): Add is_ordinary parameter. Change all callers. (Sized_relobj::include_section_group): Adjust section links and symbol section indexes. (Sized_relobj::do_layout): Adjust section links. (Sized_relobj::do_count_local_symbols): Adjust section links and symbol section indexes. (Sized_relobj::do_finalize_local_symbols): Distinguish between ordinary and special symbols. (Sized_relobj::write_local_symbols): Add symtab_xindex and dynsym_xindex parameters. Change all callers. Adjust section links. Use SHN_XINDEX when needed. (Sized_relobj::get_symbol_location_info): Adjust section links. Don't get fooled by special symbols. * object.h (class Xindex): Define. (class Object): Add xindex_ parameter. Declare virtual functoin do_initialize_xindex. (Object::adjust_sym_shndx): New function. (Object::set_xindex): New protected function. (class Symbol_value): Add is_ordinary_shndx_ field. (Symbol_value::Symbol_value): Initialize is_ordinary_shndx_. (Symbol_value::value): Assert ordinary section. (Symbol_value::initialize_input_to_output_map): Likewise. (Symbol_value::set_input_shndx): Add is_ordinary parameter. Change all callers. (Symbol_value::input_shndx): Add is_ordinary parameter. Change all callers. (class Sized_relobj): Update declarations. (Sized_relobj::local_symbol_input_shndx): Add is_ordinary parameter. Change all callers. (Sized_relobj::adjust_shndx): New function. * dynobj.cc (Sized_dynobj::Sized_dynobj): Initialize dynsym_shndx_ field. (Sized_dynobj::find_dynsym_sections): Remove pdynsym_shndx parameter. Change all callers. Pick up SHT_DYNSYM_SHNDX section for SHT_DYNSYM section if available. Set dynsym_shndx_ field. (Sized_dynobj::read_dynsym_section): Adjust section links. (Sized_dynobj::read_dynamic): Likewise. (Sized_dynobj::do_read_symbols): Use dynsym_shndx_ field. Adjust section links. (Sized_dynobj::do_initialize_xindex): New function. * dynobj.h (class Sized_dynobj): Add dynsym_shndx_ field. Declare do_initialize_xindex. (Sized_dynobj::adjust_shndx): New function. * layout.cc (Layout::Layout): Initialize symtab_xindex_ and dynsym_xindex_ fields. (Layout::finalize): Add a call to set_section_indexes before creating the symtab sections. (Layout::set_section_indexes): Don't do anything if the section already has a section index. (Layout::create_symtab_sections): Add shnum parameter. Change caller. Create .symtab_shndx section if needed. (Layout::create_shdrs): Add shstrtab_section parameter. Change caller. (Layout::allocated_output_section_count): New function. (Layout::create_dynamic_symtab): Create .dynsym_shndx section if needed. * layout.h (class Layout): Add symtab_xindex_ and dynsym_xindex_ fields. Update declarations. (Layout::symtab_xindex): New function. (Layout::dynsym_xindex): New function. (class Write_symbols_task): Add layout_ field. (Write_symbols_task::Write_symbols_task): Add layout parameter. Change caller. * output.cc (Output_section_headers::Output_section_headers): Add shstrtab_section parameter. Change all callers. (Output_section_headers::do_sized_write): Store overflow values for section count and section string table section index in section header zero. (Output_file_header::do_sized_write): Check for overflow of section count and section string table section index. (Output_symtab_xindex::do_write): New function. (Output_symtab_xindex::endian_do_write): New function. * output.h (class Output_section_headers): Add shstrtab_section_. Update declarations. (class Output_symtab_xindex): Define. (Output_section::has_out_shndx): New function. * symtab.cc (Symbol::init_fields): Initialize is_ordinary_shndx_ field. (Symbol::init_base): Add st_shndx and is_ordinary parameters. Change all callers. (Sized_symbol::init): Likewise. (Symbol::output_section): Check for ordinary symbol. (Symbol_table::add_from_object): Remove orig_sym parameter. Add st_shndx, is_ordinary, and orig_st_shndx parameters. Change all callers. (Symbol_table::add_from_relobj): Add symndx_offset parameter. Change all callers. Simplify handling of symbols from sections not included in the link. (Symbol_table::add_from_dynobj): Handle ordinary symbol distinction. (Weak_alias_sorter::operator()): Assert that symbols are ordinary. (Symbol_table::sized_finalize_symbol): Handle ordinary symbol distinction. (Symbol_table::write_globals): Add symtab_xindex and dynsym_xindex parameters. Change all callers. (Symbol_table::sized_write_globals): Likewise. Handle ordinary symbol distinction. Use SHN_XINDEX when needed. (Symbol_table::write_section_symbol): Add symtab_xindex parameter. Change all callers. (Symbol_table::sized_write_section_symbol): Likewise. Use SHN_XINDEX when needed. * symtab.h (class Symbol): Add is_ordinary_shndx_ field. Update declarations. (Symbol::shndx): Add is_ordinary parameter. Change all callers. (Symbol::is_defined): Check is_ordinary. (Symbol::is_undefined, Symbol::is_weak_undefined): Likewise. (Symbol::is_absolute, Symbol::is_common): Likewise. (class Sized_symbol): Update declarations. (class Symbol_table): Update declarations. * resolve.cc (Symbol::override_base): Add st_shndx and is_ordinary parameters. Change all callers. (Sized_symbol::override): Likewise. (Symbol_table::override): Likewise. (symbol_to_bits): Add is_ordinary parameter. Change all callers. (Symbol_table::resolve): Remove orig_sym parameter. Add st_shndx, is_ordinary, and orig_st_shndx parameters. Change all callers. * copy-relocs.cc (Copy_relocs::emit_copy_reloc): Require symbol to be in an ordinary section. * dwarf_reader.cc (Sized_dwarf_line_info::symbol_section): Add object and is_ordinary parameters. Change all callers. (Sized_dwarf_line_info::read_relocs): Add object parameter. Change all callers. Don't add undefined or non-ordinary symbols to reloc_map_. (Sized_dwarf_line_info::read_line_mappings): Add object parameter. Change all callers. * dwarf_reader.h (class Sized_dwarf_line_info): Update declarations. * ehframe.cc (Eh_frame::read_fde): Check for ordinary symbol. * reloc.cc (Sized_relobj::do_read_relocs): Adjust section links. (Sized_relobj::relocate_sections): Likewise. * target-reloc.h (scan_relocs): Adjust section symbol index. (scan_relocatable_relocs): Likewise. * i386.cc (Scan::local): Check for ordinary symbols. * sparc.cc (Scan::local): Likewise. * x86_64.cc (Scan::local): Likewise. * testsuite/binary_unittest.cc (Sized_binary_test): Update calls to symbol_section_and_value. * testsuite/many_sections_test.cc: New file. * testsuite/Makefile.am (BUILT_SOURCES): Define. (check_PROGRAMS): Add many_sections_test. (many_sections_test_SOURCES): Define. (many_sections_test_DEPENDENCIES): Define. (many_sections_test_LDFLAGS): Define. (BUILT_SOURCES): Add many_sections_define.h. (many_sections_define.h): New target. (BUILT_SOURCES): Add many_sections_check.h. (many_sections_check.h): New target. (check_PROGRAMS): Add many_sections_r_test. (many_sections_r_test_SOURCES): Define. (many_sections_r_test_DEPENDENCIES): Define. (many_sections_r_test_LDFLAGS): Define. (many_sections_r_test_LDADD): Define. (many_sections_r_test.o): New target. * testsuite/Makefile.in: Rebuild.
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// Return the Xindex structure to use.
Xindex*
do_initialize_xindex();
* cref.cc: New file. * cref.h: New file. * options.h (class General_options): Add --print-symbol-counts. * main.cc (main): Issue defined symbol report if requested. * archive.cc (Archive::interpret_header): Make into a const member function. (Archive::add_symbols): Call Input_objects::archive_start and archive_stop. (Archive::const_iterator): Define new class. (Archive::begin, Archive::end): New functions. (Archive::include_all_members): Rewrite to use iterator. (Archive::count_members): New function. * archive.h (class Archive): Update declarations. (Archive::filename): New function. * object.cc: Include "cref.h". (Sized_relobj::Sized_relobj): Initialize defined_count_. (Sized_relobj::do_get_global_symbol_counts): New function. (Input_objects::add_object): Add object to cross-referencer. (Input_objects::archive_start): New function. (Input_objects::archive_stop): New function. (Input_objects::print_symbol_counts): New function. * object.h: Declare Cref and Archive. (Object::get_global_symbol_counts): New function. (Object::do_get_global_symbol_counts): New pure virtual function. (class Sized_relobj): Add defined_count_ field. Update declarations. (class Input_objects): Add cref_ field. Update constructor. Update declarations. * dynobj.cc (Sized_dynobj::Sized_dynobj): Initialize symbols_ and defined_count_. (Sized_dynobj::do_add_symbols): Allocate symbols_ if printing symbol counts. (Sized_dynobj::do_get_global_symbol_counts): New function. * dynobj.h (class Sized_dynobj): Add fields symbols_ and defined_count_. Update declarations. Define Symbols typedef. * symtab.cc (Symbol_table::add_from_relobj): Add defined parameter. Change all callers. (Symbol_table::add_from_dynobj): Add sympointers and defined parameters. Change all callers. * symtab.h (class Symbol_table): Update declarations. * Makefile.am (CCFILES): Add cref.cc. (HFILES): Add cref.h. * Makefile.in: Rebuild.
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// 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;
* object.cc (Xindex::initialize_symtab_xindex): New function. (Xindex::read_symtab_xindex): New function. (Xindex::sym_xindex_to_shndx): New function. (Sized_relobj::find_symtab): Pick up SHT_SYMTAB_SHNDX section if available. (Sized_relobj::do_initialize_xindex): New function. (Sized_relobj::do_read_symbols): Adjust section links. (Sized_relobj::symbol_section_and_value): Add is_ordinary parameter. Change all callers. (Sized_relobj::include_section_group): Adjust section links and symbol section indexes. (Sized_relobj::do_layout): Adjust section links. (Sized_relobj::do_count_local_symbols): Adjust section links and symbol section indexes. (Sized_relobj::do_finalize_local_symbols): Distinguish between ordinary and special symbols. (Sized_relobj::write_local_symbols): Add symtab_xindex and dynsym_xindex parameters. Change all callers. Adjust section links. Use SHN_XINDEX when needed. (Sized_relobj::get_symbol_location_info): Adjust section links. Don't get fooled by special symbols. * object.h (class Xindex): Define. (class Object): Add xindex_ parameter. Declare virtual functoin do_initialize_xindex. (Object::adjust_sym_shndx): New function. (Object::set_xindex): New protected function. (class Symbol_value): Add is_ordinary_shndx_ field. (Symbol_value::Symbol_value): Initialize is_ordinary_shndx_. (Symbol_value::value): Assert ordinary section. (Symbol_value::initialize_input_to_output_map): Likewise. (Symbol_value::set_input_shndx): Add is_ordinary parameter. Change all callers. (Symbol_value::input_shndx): Add is_ordinary parameter. Change all callers. (class Sized_relobj): Update declarations. (Sized_relobj::local_symbol_input_shndx): Add is_ordinary parameter. Change all callers. (Sized_relobj::adjust_shndx): New function. * dynobj.cc (Sized_dynobj::Sized_dynobj): Initialize dynsym_shndx_ field. (Sized_dynobj::find_dynsym_sections): Remove pdynsym_shndx parameter. Change all callers. Pick up SHT_DYNSYM_SHNDX section for SHT_DYNSYM section if available. Set dynsym_shndx_ field. (Sized_dynobj::read_dynsym_section): Adjust section links. (Sized_dynobj::read_dynamic): Likewise. (Sized_dynobj::do_read_symbols): Use dynsym_shndx_ field. Adjust section links. (Sized_dynobj::do_initialize_xindex): New function. * dynobj.h (class Sized_dynobj): Add dynsym_shndx_ field. Declare do_initialize_xindex. (Sized_dynobj::adjust_shndx): New function. * layout.cc (Layout::Layout): Initialize symtab_xindex_ and dynsym_xindex_ fields. (Layout::finalize): Add a call to set_section_indexes before creating the symtab sections. (Layout::set_section_indexes): Don't do anything if the section already has a section index. (Layout::create_symtab_sections): Add shnum parameter. Change caller. Create .symtab_shndx section if needed. (Layout::create_shdrs): Add shstrtab_section parameter. Change caller. (Layout::allocated_output_section_count): New function. (Layout::create_dynamic_symtab): Create .dynsym_shndx section if needed. * layout.h (class Layout): Add symtab_xindex_ and dynsym_xindex_ fields. Update declarations. (Layout::symtab_xindex): New function. (Layout::dynsym_xindex): New function. (class Write_symbols_task): Add layout_ field. (Write_symbols_task::Write_symbols_task): Add layout parameter. Change caller. * output.cc (Output_section_headers::Output_section_headers): Add shstrtab_section parameter. Change all callers. (Output_section_headers::do_sized_write): Store overflow values for section count and section string table section index in section header zero. (Output_file_header::do_sized_write): Check for overflow of section count and section string table section index. (Output_symtab_xindex::do_write): New function. (Output_symtab_xindex::endian_do_write): New function. * output.h (class Output_section_headers): Add shstrtab_section_. Update declarations. (class Output_symtab_xindex): Define. (Output_section::has_out_shndx): New function. * symtab.cc (Symbol::init_fields): Initialize is_ordinary_shndx_ field. (Symbol::init_base): Add st_shndx and is_ordinary parameters. Change all callers. (Sized_symbol::init): Likewise. (Symbol::output_section): Check for ordinary symbol. (Symbol_table::add_from_object): Remove orig_sym parameter. Add st_shndx, is_ordinary, and orig_st_shndx parameters. Change all callers. (Symbol_table::add_from_relobj): Add symndx_offset parameter. Change all callers. Simplify handling of symbols from sections not included in the link. (Symbol_table::add_from_dynobj): Handle ordinary symbol distinction. (Weak_alias_sorter::operator()): Assert that symbols are ordinary. (Symbol_table::sized_finalize_symbol): Handle ordinary symbol distinction. (Symbol_table::write_globals): Add symtab_xindex and dynsym_xindex parameters. Change all callers. (Symbol_table::sized_write_globals): Likewise. Handle ordinary symbol distinction. Use SHN_XINDEX when needed. (Symbol_table::write_section_symbol): Add symtab_xindex parameter. Change all callers. (Symbol_table::sized_write_section_symbol): Likewise. Use SHN_XINDEX when needed. * symtab.h (class Symbol): Add is_ordinary_shndx_ field. Update declarations. (Symbol::shndx): Add is_ordinary parameter. Change all callers. (Symbol::is_defined): Check is_ordinary. (Symbol::is_undefined, Symbol::is_weak_undefined): Likewise. (Symbol::is_absolute, Symbol::is_common): Likewise. (class Sized_symbol): Update declarations. (class Symbol_table): Update declarations. * resolve.cc (Symbol::override_base): Add st_shndx and is_ordinary parameters. Change all callers. (Sized_symbol::override): Likewise. (Symbol_table::override): Likewise. (symbol_to_bits): Add is_ordinary parameter. Change all callers. (Symbol_table::resolve): Remove orig_sym parameter. Add st_shndx, is_ordinary, and orig_st_shndx parameters. Change all callers. * copy-relocs.cc (Copy_relocs::emit_copy_reloc): Require symbol to be in an ordinary section. * dwarf_reader.cc (Sized_dwarf_line_info::symbol_section): Add object and is_ordinary parameters. Change all callers. (Sized_dwarf_line_info::read_relocs): Add object parameter. Change all callers. Don't add undefined or non-ordinary symbols to reloc_map_. (Sized_dwarf_line_info::read_line_mappings): Add object parameter. Change all callers. * dwarf_reader.h (class Sized_dwarf_line_info): Update declarations. * ehframe.cc (Eh_frame::read_fde): Check for ordinary symbol. * reloc.cc (Sized_relobj::do_read_relocs): Adjust section links. (Sized_relobj::relocate_sections): Likewise. * target-reloc.h (scan_relocs): Adjust section symbol index. (scan_relocatable_relocs): Likewise. * i386.cc (Scan::local): Check for ordinary symbols. * sparc.cc (Scan::local): Likewise. * x86_64.cc (Scan::local): Likewise. * testsuite/binary_unittest.cc (Sized_binary_test): Update calls to symbol_section_and_value. * testsuite/many_sections_test.cc: New file. * testsuite/Makefile.am (BUILT_SOURCES): Define. (check_PROGRAMS): Add many_sections_test. (many_sections_test_SOURCES): Define. (many_sections_test_DEPENDENCIES): Define. (many_sections_test_LDFLAGS): Define. (BUILT_SOURCES): Add many_sections_define.h. (many_sections_define.h): New target. (BUILT_SOURCES): Add many_sections_check.h. (many_sections_check.h): New target. (check_PROGRAMS): Add many_sections_r_test. (many_sections_r_test_SOURCES): Define. (many_sections_r_test_DEPENDENCIES): Define. (many_sections_r_test_LDFLAGS): Define. (many_sections_r_test_LDADD): Define. (many_sections_r_test.o): New target. * testsuite/Makefile.in: Rebuild.
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// 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;
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// 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_;
* object.cc (Xindex::initialize_symtab_xindex): New function. (Xindex::read_symtab_xindex): New function. (Xindex::sym_xindex_to_shndx): New function. (Sized_relobj::find_symtab): Pick up SHT_SYMTAB_SHNDX section if available. (Sized_relobj::do_initialize_xindex): New function. (Sized_relobj::do_read_symbols): Adjust section links. (Sized_relobj::symbol_section_and_value): Add is_ordinary parameter. Change all callers. (Sized_relobj::include_section_group): Adjust section links and symbol section indexes. (Sized_relobj::do_layout): Adjust section links. (Sized_relobj::do_count_local_symbols): Adjust section links and symbol section indexes. (Sized_relobj::do_finalize_local_symbols): Distinguish between ordinary and special symbols. (Sized_relobj::write_local_symbols): Add symtab_xindex and dynsym_xindex parameters. Change all callers. Adjust section links. Use SHN_XINDEX when needed. (Sized_relobj::get_symbol_location_info): Adjust section links. Don't get fooled by special symbols. * object.h (class Xindex): Define. (class Object): Add xindex_ parameter. Declare virtual functoin do_initialize_xindex. (Object::adjust_sym_shndx): New function. (Object::set_xindex): New protected function. (class Symbol_value): Add is_ordinary_shndx_ field. (Symbol_value::Symbol_value): Initialize is_ordinary_shndx_. (Symbol_value::value): Assert ordinary section. (Symbol_value::initialize_input_to_output_map): Likewise. (Symbol_value::set_input_shndx): Add is_ordinary parameter. Change all callers. (Symbol_value::input_shndx): Add is_ordinary parameter. Change all callers. (class Sized_relobj): Update declarations. (Sized_relobj::local_symbol_input_shndx): Add is_ordinary parameter. Change all callers. (Sized_relobj::adjust_shndx): New function. * dynobj.cc (Sized_dynobj::Sized_dynobj): Initialize dynsym_shndx_ field. (Sized_dynobj::find_dynsym_sections): Remove pdynsym_shndx parameter. Change all callers. Pick up SHT_DYNSYM_SHNDX section for SHT_DYNSYM section if available. Set dynsym_shndx_ field. (Sized_dynobj::read_dynsym_section): Adjust section links. (Sized_dynobj::read_dynamic): Likewise. (Sized_dynobj::do_read_symbols): Use dynsym_shndx_ field. Adjust section links. (Sized_dynobj::do_initialize_xindex): New function. * dynobj.h (class Sized_dynobj): Add dynsym_shndx_ field. Declare do_initialize_xindex. (Sized_dynobj::adjust_shndx): New function. * layout.cc (Layout::Layout): Initialize symtab_xindex_ and dynsym_xindex_ fields. (Layout::finalize): Add a call to set_section_indexes before creating the symtab sections. (Layout::set_section_indexes): Don't do anything if the section already has a section index. (Layout::create_symtab_sections): Add shnum parameter. Change caller. Create .symtab_shndx section if needed. (Layout::create_shdrs): Add shstrtab_section parameter. Change caller. (Layout::allocated_output_section_count): New function. (Layout::create_dynamic_symtab): Create .dynsym_shndx section if needed. * layout.h (class Layout): Add symtab_xindex_ and dynsym_xindex_ fields. Update declarations. (Layout::symtab_xindex): New function. (Layout::dynsym_xindex): New function. (class Write_symbols_task): Add layout_ field. (Write_symbols_task::Write_symbols_task): Add layout parameter. Change caller. * output.cc (Output_section_headers::Output_section_headers): Add shstrtab_section parameter. Change all callers. (Output_section_headers::do_sized_write): Store overflow values for section count and section string table section index in section header zero. (Output_file_header::do_sized_write): Check for overflow of section count and section string table section index. (Output_symtab_xindex::do_write): New function. (Output_symtab_xindex::endian_do_write): New function. * output.h (class Output_section_headers): Add shstrtab_section_. Update declarations. (class Output_symtab_xindex): Define. (Output_section::has_out_shndx): New function. * symtab.cc (Symbol::init_fields): Initialize is_ordinary_shndx_ field. (Symbol::init_base): Add st_shndx and is_ordinary parameters. Change all callers. (Sized_symbol::init): Likewise. (Symbol::output_section): Check for ordinary symbol. (Symbol_table::add_from_object): Remove orig_sym parameter. Add st_shndx, is_ordinary, and orig_st_shndx parameters. Change all callers. (Symbol_table::add_from_relobj): Add symndx_offset parameter. Change all callers. Simplify handling of symbols from sections not included in the link. (Symbol_table::add_from_dynobj): Handle ordinary symbol distinction. (Weak_alias_sorter::operator()): Assert that symbols are ordinary. (Symbol_table::sized_finalize_symbol): Handle ordinary symbol distinction. (Symbol_table::write_globals): Add symtab_xindex and dynsym_xindex parameters. Change all callers. (Symbol_table::sized_write_globals): Likewise. Handle ordinary symbol distinction. Use SHN_XINDEX when needed. (Symbol_table::write_section_symbol): Add symtab_xindex parameter. Change all callers. (Symbol_table::sized_write_section_symbol): Likewise. Use SHN_XINDEX when needed. * symtab.h (class Symbol): Add is_ordinary_shndx_ field. Update declarations. (Symbol::shndx): Add is_ordinary parameter. Change all callers. (Symbol::is_defined): Check is_ordinary. (Symbol::is_undefined, Symbol::is_weak_undefined): Likewise. (Symbol::is_absolute, Symbol::is_common): Likewise. (class Sized_symbol): Update declarations. (class Symbol_table): Update declarations. * resolve.cc (Symbol::override_base): Add st_shndx and is_ordinary parameters. Change all callers. (Sized_symbol::override): Likewise. (Symbol_table::override): Likewise. (symbol_to_bits): Add is_ordinary parameter. Change all callers. (Symbol_table::resolve): Remove orig_sym parameter. Add st_shndx, is_ordinary, and orig_st_shndx parameters. Change all callers. * copy-relocs.cc (Copy_relocs::emit_copy_reloc): Require symbol to be in an ordinary section. * dwarf_reader.cc (Sized_dwarf_line_info::symbol_section): Add object and is_ordinary parameters. Change all callers. (Sized_dwarf_line_info::read_relocs): Add object parameter. Change all callers. Don't add undefined or non-ordinary symbols to reloc_map_. (Sized_dwarf_line_info::read_line_mappings): Add object parameter. Change all callers. * dwarf_reader.h (class Sized_dwarf_line_info): Update declarations. * ehframe.cc (Eh_frame::read_fde): Check for ordinary symbol. * reloc.cc (Sized_relobj::do_read_relocs): Adjust section links. (Sized_relobj::relocate_sections): Likewise. * target-reloc.h (scan_relocs): Adjust section symbol index. (scan_relocatable_relocs): Likewise. * i386.cc (Scan::local): Check for ordinary symbols. * sparc.cc (Scan::local): Likewise. * x86_64.cc (Scan::local): Likewise. * testsuite/binary_unittest.cc (Sized_binary_test): Update calls to symbol_section_and_value. * testsuite/many_sections_test.cc: New file. * testsuite/Makefile.am (BUILT_SOURCES): Define. (check_PROGRAMS): Add many_sections_test. (many_sections_test_SOURCES): Define. (many_sections_test_DEPENDENCIES): Define. (many_sections_test_LDFLAGS): Define. (BUILT_SOURCES): Add many_sections_define.h. (many_sections_define.h): New target. (BUILT_SOURCES): Add many_sections_check.h. (many_sections_check.h): New target. (check_PROGRAMS): Add many_sections_r_test. (many_sections_r_test_SOURCES): Define. (many_sections_r_test_DEPENDENCIES): Define. (many_sections_r_test_LDFLAGS): Define. (many_sections_r_test_LDADD): Define. (many_sections_r_test.o): New target. * testsuite/Makefile.in: Rebuild.
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// The section index of the dynamic symbol table.
unsigned int dynsym_shndx_;
* cref.cc: New file. * cref.h: New file. * options.h (class General_options): Add --print-symbol-counts. * main.cc (main): Issue defined symbol report if requested. * archive.cc (Archive::interpret_header): Make into a const member function. (Archive::add_symbols): Call Input_objects::archive_start and archive_stop. (Archive::const_iterator): Define new class. (Archive::begin, Archive::end): New functions. (Archive::include_all_members): Rewrite to use iterator. (Archive::count_members): New function. * archive.h (class Archive): Update declarations. (Archive::filename): New function. * object.cc: Include "cref.h". (Sized_relobj::Sized_relobj): Initialize defined_count_. (Sized_relobj::do_get_global_symbol_counts): New function. (Input_objects::add_object): Add object to cross-referencer. (Input_objects::archive_start): New function. (Input_objects::archive_stop): New function. (Input_objects::print_symbol_counts): New function. * object.h: Declare Cref and Archive. (Object::get_global_symbol_counts): New function. (Object::do_get_global_symbol_counts): New pure virtual function. (class Sized_relobj): Add defined_count_ field. Update declarations. (class Input_objects): Add cref_ field. Update constructor. Update declarations. * dynobj.cc (Sized_dynobj::Sized_dynobj): Initialize symbols_ and defined_count_. (Sized_dynobj::do_add_symbols): Allocate symbols_ if printing symbol counts. (Sized_dynobj::do_get_global_symbol_counts): New function. * dynobj.h (class Sized_dynobj): Add fields symbols_ and defined_count_. Update declarations. Define Symbols typedef. * symtab.cc (Symbol_table::add_from_relobj): Add defined parameter. Change all callers. (Symbol_table::add_from_dynobj): Add sympointers and defined parameters. Change all callers. * symtab.h (class Symbol_table): Update declarations. * Makefile.am (CCFILES): Add cref.cc. (HFILES): Add cref.h. * Makefile.in: Rebuild.
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// 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_;
};
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// 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)
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{
gold_assert(this->index_ == -1U);
this->index_ = index;
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}
// 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)
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{ }
// 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); }
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// 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_; }
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// 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*
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write(const Stringpool*, bool is_last, unsigned char*) const;
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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;
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// 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_;
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// 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)
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{ }
// 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_()
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{ }
~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*
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write(const Stringpool*, bool is_last, unsigned char*) const;
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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*);
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~Versions();
// SYM is going into the dynamic symbol table and has a version.
// Record the appropriate version information.
void
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record_version(const Symbol_table* symtab, Stringpool*, const Symbol* sym);
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// 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,
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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
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symbol_section_contents(const Symbol_table*, const Stringpool*,
unsigned int local_symcount,
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const std::vector<Symbol*>& syms,
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unsigned char**, unsigned int*) const;
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// 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**,
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unsigned int* psize, unsigned int* pentries) const;
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// 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**,
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unsigned int* psize, unsigned int* pentries) const;
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const Version_script_info&
version_script() const
{ return this->version_script_; }
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private:
Versions(const Versions&);
Versions& operator=(const Versions&);
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// 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
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add_def(const Symbol* sym, const char* version, Stringpool::Key);
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// Add a reference to version NAME in file FILENAME.
void
add_need(Stringpool*, const char* filename, const char* name,
Stringpool::Key);
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// Get the dynamic object to use for SYM.
Dynobj*
get_dynobj_for_sym(const Symbol_table*, const Symbol* sym) const;
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// Return the version index to use for SYM.
unsigned int
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version_index(const Symbol_table*, const Stringpool*,
const Symbol* sym) const;
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// Define the base version of a shared library.
void
define_base_version(Stringpool* dynpool);
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// 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_;
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};
} // End namespace gold.
#endif // !defined(GOLD_DYNOBJ_H)