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incremental.h
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2255 lines (1842 loc) · 64 KB
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// inremental.h -- incremental linking support for gold -*- C++ -*-
// Copyright (C) 2009-2016 Free Software Foundation, Inc.
// Written by Mikolaj Zalewski <[email protected]>.
// 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_INCREMENTAL_H
#define GOLD_INCREMENTAL_H
#include <map>
#include <vector>
#include "elfcpp_file.h"
#include "stringpool.h"
#include "workqueue.h"
#include "fileread.h"
#include "output.h"
#include "archive.h"
namespace gold
{
class Input_argument;
class Incremental_inputs_checker;
class Incremental_script_entry;
class Incremental_object_entry;
class Incremental_dynobj_entry;
class Incremental_archive_entry;
class Incremental_inputs;
class Incremental_binary;
class Incremental_library;
class Object;
// Incremental input type as stored in .gnu_incremental_inputs.
enum Incremental_input_type
{
INCREMENTAL_INPUT_OBJECT = 1,
INCREMENTAL_INPUT_ARCHIVE_MEMBER = 2,
INCREMENTAL_INPUT_ARCHIVE = 3,
INCREMENTAL_INPUT_SHARED_LIBRARY = 4,
INCREMENTAL_INPUT_SCRIPT = 5
};
// Incremental input file flags.
// The input file type is stored in the lower eight bits.
enum Incremental_input_flags
{
INCREMENTAL_INPUT_IN_SYSTEM_DIR = 0x8000,
INCREMENTAL_INPUT_AS_NEEDED = 0x4000
};
// Symbol flags for the incremental symbol table.
// These flags are stored in the top two bits of
// the symbol index field.
enum Incremental_shlib_symbol_flags
{
// Symbol is defined in this library.
INCREMENTAL_SHLIB_SYM_DEF = 2,
// Symbol is defined in this library, with a COPY relocation.
INCREMENTAL_SHLIB_SYM_COPY = 3
};
static const int INCREMENTAL_SHLIB_SYM_FLAGS_SHIFT = 30;
// Return TRUE if a section of type SH_TYPE can be updated in place
// during an incremental update.
bool
can_incremental_update(unsigned int sh_type);
// Create an Incremental_binary object for FILE. Returns NULL is this is not
// possible, e.g. FILE is not an ELF file or has an unsupported target.
Incremental_binary*
open_incremental_binary(Output_file* file);
// Base class for recording each input file.
class Incremental_input_entry
{
public:
Incremental_input_entry(Stringpool::Key filename_key, unsigned int arg_serial,
Timespec mtime)
: filename_key_(filename_key), file_index_(0), offset_(0), info_offset_(0),
arg_serial_(arg_serial), mtime_(mtime), is_in_system_directory_(false),
as_needed_(false)
{ }
virtual
~Incremental_input_entry()
{ }
// Return the type of input file.
Incremental_input_type
type() const
{ return this->do_type(); }
// Set the index and section offset of this input file entry.
void
set_offset(unsigned int file_index, unsigned int offset)
{
this->file_index_ = file_index;
this->offset_ = offset;
}
// Set the section offset of the supplemental information for this entry.
void
set_info_offset(unsigned int info_offset)
{ this->info_offset_ = info_offset; }
// Get the index of this input file entry.
unsigned int
get_file_index() const
{ return this->file_index_; }
// Get the section offset of this input file entry.
unsigned int
get_offset() const
{ return this->offset_; }
// Get the section offset of the supplemental information for this entry.
unsigned int
get_info_offset() const
{ return this->info_offset_; }
// Get the stringpool key for the input filename.
Stringpool::Key
get_filename_key() const
{ return this->filename_key_; }
// Get the serial number of the input file.
unsigned int
arg_serial() const
{ return this->arg_serial_; }
// Get the modification time of the input file.
const Timespec&
get_mtime() const
{ return this->mtime_; }
// Record that the file was found in a system directory.
void
set_is_in_system_directory()
{ this->is_in_system_directory_ = true; }
// Return TRUE if the file was found in a system directory.
bool
is_in_system_directory() const
{ return this->is_in_system_directory_; }
// Record that the file was linked with --as-needed.
void
set_as_needed()
{ this->as_needed_ = true; }
// Return TRUE if the file was linked with --as-needed.
bool
as_needed() const
{ return this->as_needed_; }
// Return a pointer to the derived Incremental_script_entry object.
// Return NULL for input entries that are not script files.
Incremental_script_entry*
script_entry()
{ return this->do_script_entry(); }
// Return a pointer to the derived Incremental_object_entry object.
// Return NULL for input entries that are not object files.
Incremental_object_entry*
object_entry()
{ return this->do_object_entry(); }
// Return a pointer to the derived Incremental_dynobj_entry object.
// Return NULL for input entries that are not shared object files.
Incremental_dynobj_entry*
dynobj_entry()
{ return this->do_dynobj_entry(); }
// Return a pointer to the derived Incremental_archive_entry object.
// Return NULL for input entries that are not archive files.
Incremental_archive_entry*
archive_entry()
{ return this->do_archive_entry(); }
protected:
// Return the type of input file.
virtual Incremental_input_type
do_type() const = 0;
// Return a pointer to the derived Incremental_script_entry object.
// Return NULL for input entries that are not script files.
virtual Incremental_script_entry*
do_script_entry()
{ return NULL; }
// Return a pointer to the derived Incremental_object_entry object.
// Return NULL for input entries that are not object files.
virtual Incremental_object_entry*
do_object_entry()
{ return NULL; }
// Return a pointer to the derived Incremental_dynobj_entry object.
// Return NULL for input entries that are not shared object files.
virtual Incremental_dynobj_entry*
do_dynobj_entry()
{ return NULL; }
// Return a pointer to the derived Incremental_archive_entry object.
// Return NULL for input entries that are not archive files.
virtual Incremental_archive_entry*
do_archive_entry()
{ return NULL; }
private:
// Key of the filename string in the section stringtable.
Stringpool::Key filename_key_;
// Index of the entry in the output section.
unsigned int file_index_;
// Offset of the entry in the output section.
unsigned int offset_;
// Offset of the extra information in the output section.
unsigned int info_offset_;
// Serial number of the file in the argument list.
unsigned int arg_serial_;
// Last modification time of the file.
Timespec mtime_;
// TRUE if the file was found in a system directory.
bool is_in_system_directory_;
// TRUE if the file was linked with --as-needed.
bool as_needed_;
};
// Information about a script input that will persist during the whole linker
// run. Needed only during an incremental build to retrieve the input files
// added by this script.
class Script_info
{
public:
Script_info(const std::string& filename)
: filename_(filename), input_file_index_(0),
incremental_script_entry_(NULL)
{ }
Script_info(const std::string& filename, unsigned int input_file_index)
: filename_(filename), input_file_index_(input_file_index),
incremental_script_entry_(NULL)
{ }
// Store a pointer to the incremental information for this script.
void
set_incremental_info(Incremental_script_entry* entry)
{ this->incremental_script_entry_ = entry; }
// Return the filename.
const std::string&
filename() const
{ return this->filename_; }
// Return the input file index.
unsigned int
input_file_index() const
{ return this->input_file_index_; }
// Return the pointer to the incremental information for this script.
Incremental_script_entry*
incremental_info() const
{ return this->incremental_script_entry_; }
private:
const std::string filename_;
unsigned int input_file_index_;
Incremental_script_entry* incremental_script_entry_;
};
// Class for recording input scripts.
class Incremental_script_entry : public Incremental_input_entry
{
public:
Incremental_script_entry(Stringpool::Key filename_key,
unsigned int arg_serial, Script_info* /*script*/,
Timespec mtime)
: Incremental_input_entry(filename_key, arg_serial, mtime),
objects_()
{ }
// Add a member object to the archive.
void
add_object(Incremental_input_entry* obj_entry)
{
this->objects_.push_back(obj_entry);
}
// Return the number of objects included by this script.
unsigned int
get_object_count()
{ return this->objects_.size(); }
// Return the Nth object.
Incremental_input_entry*
get_object(unsigned int n)
{
gold_assert(n < this->objects_.size());
return this->objects_[n];
}
protected:
virtual Incremental_input_type
do_type() const
{ return INCREMENTAL_INPUT_SCRIPT; }
// Return a pointer to the derived Incremental_script_entry object.
virtual Incremental_script_entry*
do_script_entry()
{ return this; }
private:
// Objects that have been included by this script.
std::vector<Incremental_input_entry*> objects_;
};
// Class for recording input object files.
class Incremental_object_entry : public Incremental_input_entry
{
public:
Incremental_object_entry(Stringpool::Key filename_key, Object* obj,
unsigned int arg_serial, Timespec mtime)
: Incremental_input_entry(filename_key, arg_serial, mtime), obj_(obj),
is_member_(false), sections_(), groups_()
{ this->sections_.reserve(obj->shnum()); }
// Get the object.
Object*
object() const
{ return this->obj_; }
// Record that this object is an archive member.
void
set_is_member()
{ this->is_member_ = true; }
// Return true if this object is an archive member.
bool
is_member() const
{ return this->is_member_; }
// Add an input section.
void
add_input_section(unsigned int shndx, Stringpool::Key name_key, off_t sh_size)
{ this->sections_.push_back(Input_section(shndx, name_key, sh_size)); }
// Return the number of input sections in this object.
unsigned int
get_input_section_count() const
{ return this->sections_.size(); }
// Return the input section index for the Nth input section.
Stringpool::Key
get_input_section_index(unsigned int n) const
{ return this->sections_[n].shndx_; }
// Return the stringpool key of the Nth input section.
Stringpool::Key
get_input_section_name_key(unsigned int n) const
{ return this->sections_[n].name_key_; }
// Return the size of the Nth input section.
off_t
get_input_section_size(unsigned int n) const
{ return this->sections_[n].sh_size_; }
// Add a kept COMDAT group.
void
add_comdat_group(Stringpool::Key signature_key)
{ this->groups_.push_back(signature_key); }
// Return the number of COMDAT groups.
unsigned int
get_comdat_group_count() const
{ return this->groups_.size(); }
// Return the stringpool key for the signature of the Nth comdat group.
Stringpool::Key
get_comdat_signature_key(unsigned int n) const
{ return this->groups_[n]; }
protected:
virtual Incremental_input_type
do_type() const
{
return (this->is_member_
? INCREMENTAL_INPUT_ARCHIVE_MEMBER
: INCREMENTAL_INPUT_OBJECT);
}
// Return a pointer to the derived Incremental_object_entry object.
virtual Incremental_object_entry*
do_object_entry()
{ return this; }
private:
// The object file itself.
Object* obj_;
// Whether this object is an archive member.
bool is_member_;
// Input sections.
struct Input_section
{
Input_section(unsigned int shndx, Stringpool::Key name_key, off_t sh_size)
: shndx_(shndx), name_key_(name_key), sh_size_(sh_size)
{ }
unsigned int shndx_;
Stringpool::Key name_key_;
off_t sh_size_;
};
std::vector<Input_section> sections_;
// COMDAT groups.
std::vector<Stringpool::Key> groups_;
};
// Class for recording shared library input files.
class Incremental_dynobj_entry : public Incremental_input_entry
{
public:
Incremental_dynobj_entry(Stringpool::Key filename_key,
Stringpool::Key soname_key, Object* obj,
unsigned int arg_serial, Timespec mtime)
: Incremental_input_entry(filename_key, arg_serial, mtime),
soname_key_(soname_key), obj_(obj)
{ }
// Get the object.
Object*
object() const
{ return this->obj_; }
// Get the stringpool key for the soname.
Stringpool::Key
get_soname_key() const
{ return this->soname_key_; }
protected:
virtual Incremental_input_type
do_type() const
{ return INCREMENTAL_INPUT_SHARED_LIBRARY; }
// Return a pointer to the derived Incremental_dynobj_entry object.
virtual Incremental_dynobj_entry*
do_dynobj_entry()
{ return this; }
private:
// Key of the soname string in the section stringtable.
Stringpool::Key soname_key_;
// The object file itself.
Object* obj_;
};
// Class for recording archive library input files.
class Incremental_archive_entry : public Incremental_input_entry
{
public:
Incremental_archive_entry(Stringpool::Key filename_key,
unsigned int arg_serial, Timespec mtime)
: Incremental_input_entry(filename_key, arg_serial, mtime), members_(),
unused_syms_()
{ }
// Add a member object to the archive.
void
add_object(Incremental_object_entry* obj_entry)
{
this->members_.push_back(obj_entry);
obj_entry->set_is_member();
}
// Add an unused global symbol to the archive.
void
add_unused_global_symbol(Stringpool::Key symbol_key)
{ this->unused_syms_.push_back(symbol_key); }
// Return the number of member objects included in the link.
unsigned int
get_member_count()
{ return this->members_.size(); }
// Return the Nth member object.
Incremental_object_entry*
get_member(unsigned int n)
{ return this->members_[n]; }
// Return the number of unused global symbols in this archive.
unsigned int
get_unused_global_symbol_count()
{ return this->unused_syms_.size(); }
// Return the Nth unused global symbol.
Stringpool::Key
get_unused_global_symbol(unsigned int n)
{ return this->unused_syms_[n]; }
protected:
virtual Incremental_input_type
do_type() const
{ return INCREMENTAL_INPUT_ARCHIVE; }
// Return a pointer to the derived Incremental_archive_entry object.
virtual Incremental_archive_entry*
do_archive_entry()
{ return this; }
private:
// Members of the archive that have been included in the link.
std::vector<Incremental_object_entry*> members_;
// Unused global symbols from this archive.
std::vector<Stringpool::Key> unused_syms_;
};
// This class contains the information needed during an incremental
// build about the inputs necessary to build the .gnu_incremental_inputs.
class Incremental_inputs
{
public:
typedef std::vector<Incremental_input_entry*> Input_list;
Incremental_inputs()
: inputs_(), command_line_(), command_line_key_(0),
strtab_(new Stringpool()), current_object_(NULL),
current_object_entry_(NULL), inputs_section_(NULL),
symtab_section_(NULL), relocs_section_(NULL),
reloc_count_(0)
{ }
~Incremental_inputs() { delete this->strtab_; }
// Record the command line.
void
report_command_line(int argc, const char* const* argv);
// Record the initial info for archive file ARCHIVE.
void
report_archive_begin(Library_base* arch, unsigned int arg_serial,
Script_info* script_info);
// Record the final info for archive file ARCHIVE.
void
report_archive_end(Library_base* arch);
// Record the info for object file OBJ. If ARCH is not NULL,
// attach the object file to the archive.
void
report_object(Object* obj, unsigned int arg_serial, Library_base* arch,
Script_info* script_info);
// Record an input section belonging to object file OBJ.
void
report_input_section(Object* obj, unsigned int shndx, const char* name,
off_t sh_size);
// Record a kept COMDAT group belonging to object file OBJ.
void
report_comdat_group(Object* obj, const char* name);
// Record the info for input script SCRIPT.
void
report_script(Script_info* script, unsigned int arg_serial,
Timespec mtime);
// Return the running count of incremental relocations.
unsigned int
get_reloc_count() const
{ return this->reloc_count_; }
// Update the running count of incremental relocations.
void
set_reloc_count(unsigned int count)
{ this->reloc_count_ = count; }
// Prepare for layout. Called from Layout::finalize.
void
finalize();
// Create the .gnu_incremental_inputs and related sections.
void
create_data_sections(Symbol_table* symtab);
// Return the .gnu_incremental_inputs section.
Output_section_data*
inputs_section() const
{ return this->inputs_section_; }
// Return the .gnu_incremental_symtab section.
Output_data_space*
symtab_section() const
{ return this->symtab_section_; }
// Return the .gnu_incremental_relocs section.
Output_data_space*
relocs_section() const
{ return this->relocs_section_; }
// Return the .gnu_incremental_got_plt section.
Output_data_space*
got_plt_section() const
{ return this->got_plt_section_; }
// Return the .gnu_incremental_strtab stringpool.
Stringpool*
get_stringpool() const
{ return this->strtab_; }
// Return the canonical form of the command line, as will be stored in
// .gnu_incremental_strtab.
const std::string&
command_line() const
{ return this->command_line_; }
// Return the stringpool key of the command line.
Stringpool::Key
command_line_key() const
{ return this->command_line_key_; }
// Return the number of input files.
int
input_file_count() const
{ return this->inputs_.size(); }
// Return the input files.
const Input_list&
input_files() const
{ return this->inputs_; }
// Return the sh_entsize value for the .gnu_incremental_relocs section.
unsigned int
relocs_entsize() const;
private:
// The list of input files.
Input_list inputs_;
// Canonical form of the command line, as will be stored in
// .gnu_incremental_strtab.
std::string command_line_;
// The key of the command line string in the string pool.
Stringpool::Key command_line_key_;
// The .gnu_incremental_strtab string pool associated with the
// .gnu_incremental_inputs.
Stringpool* strtab_;
// Keep track of the object currently being processed.
Object* current_object_;
Incremental_object_entry* current_object_entry_;
// The .gnu_incremental_inputs section.
Output_section_data* inputs_section_;
// The .gnu_incremental_symtab section.
Output_data_space* symtab_section_;
// The .gnu_incremental_relocs section.
Output_data_space* relocs_section_;
// The .gnu_incremental_got_plt section.
Output_data_space* got_plt_section_;
// Total count of incremental relocations. Updated during Scan_relocs
// phase at the completion of each object file.
unsigned int reloc_count_;
};
// Reader class for global symbol info from an object file entry in
// the .gnu_incremental_inputs section.
template<bool big_endian>
class Incremental_global_symbol_reader
{
private:
typedef elfcpp::Swap<32, big_endian> Swap32;
public:
Incremental_global_symbol_reader(const unsigned char* p)
: p_(p)
{ }
unsigned int
output_symndx() const
{ return Swap32::readval(this->p_); }
unsigned int
shndx() const
{ return Swap32::readval(this->p_ + 4); }
unsigned int
next_offset() const
{ return Swap32::readval(this->p_ + 8); }
unsigned int
reloc_count() const
{ return Swap32::readval(this->p_ + 12); }
unsigned int
reloc_offset() const
{ return Swap32::readval(this->p_ + 16); }
private:
// Base address of the symbol entry.
const unsigned char* p_;
};
// Reader class for .gnu_incremental_inputs section.
template<int size, bool big_endian>
class Incremental_inputs_reader
{
private:
typedef elfcpp::Swap<size, big_endian> Swap;
typedef elfcpp::Swap<16, big_endian> Swap16;
typedef elfcpp::Swap<32, big_endian> Swap32;
typedef elfcpp::Swap<64, big_endian> Swap64;
public:
// Size of the .gnu_incremental_inputs header.
// (3 x 4-byte fields, plus 4 bytes padding.)
static const unsigned int header_size = 16;
// Size of an input file entry.
// (2 x 4-byte fields, 1 x 12-byte field, 2 x 2-byte fields.)
static const unsigned int input_entry_size = 24;
// Size of the first part of the supplemental info block for
// relocatable objects and archive members.
// (7 x 4-byte fields, plus 4 bytes padding.)
static const unsigned int object_info_size = 32;
// Size of an input section entry.
// (2 x 4-byte fields, 2 x address-sized fields.)
static const unsigned int input_section_entry_size = 8 + 2 * size / 8;
// Size of a global symbol entry in the supplemental info block.
// (5 x 4-byte fields.)
static const unsigned int global_sym_entry_size = 20;
Incremental_inputs_reader()
: p_(NULL), strtab_(NULL, 0), input_file_count_(0)
{ }
Incremental_inputs_reader(const unsigned char* p,
const elfcpp::Elf_strtab& strtab)
: p_(p), strtab_(strtab)
{ this->input_file_count_ = Swap32::readval(this->p_ + 4); }
// Return the version number.
unsigned int
version() const
{ return Swap32::readval(this->p_); }
// Return the count of input file entries.
unsigned int
input_file_count() const
{ return this->input_file_count_; }
// Return the command line.
const char*
command_line() const
{
unsigned int offset = Swap32::readval(this->p_ + 8);
return this->get_string(offset);
}
// Reader class for an input file entry and its supplemental info.
class Incremental_input_entry_reader
{
private:
static const unsigned int object_info_size =
Incremental_inputs_reader<size, big_endian>::object_info_size;
static const unsigned int input_section_entry_size =
Incremental_inputs_reader<size, big_endian>::input_section_entry_size;
static const unsigned int global_sym_entry_size =
Incremental_inputs_reader<size, big_endian>::global_sym_entry_size;
public:
Incremental_input_entry_reader(const Incremental_inputs_reader* inputs,
unsigned int offset)
: inputs_(inputs), offset_(offset)
{
this->info_offset_ = Swap32::readval(inputs->p_ + offset + 4);
this->flags_ = Swap16::readval(this->inputs_->p_ + offset + 20);
}
// Return the filename.
const char*
filename() const
{
unsigned int offset = Swap32::readval(this->inputs_->p_ + this->offset_);
return this->inputs_->get_string(offset);
}
// Return the argument serial number.
unsigned int
arg_serial() const
{
return Swap16::readval(this->inputs_->p_ + this->offset_ + 22);
}
// Return the timestamp.
Timespec
get_mtime() const
{
Timespec t;
const unsigned char* p = this->inputs_->p_ + this->offset_ + 8;
t.seconds = Swap64::readval(p);
t.nanoseconds = Swap32::readval(p+8);
return t;
}
// Return the type of input file.
Incremental_input_type
type() const
{ return static_cast<Incremental_input_type>(this->flags_ & 0xff); }
// Return TRUE if the file was found in a system directory.
bool
is_in_system_directory() const
{ return (this->flags_ & INCREMENTAL_INPUT_IN_SYSTEM_DIR) != 0; }
// Return TRUE if the file was linked with --as-needed.
bool
as_needed() const
{ return (this->flags_ & INCREMENTAL_INPUT_AS_NEEDED) != 0; }
// Return the input section count -- for objects only.
unsigned int
get_input_section_count() const
{
gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT
|| this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER);
return Swap32::readval(this->inputs_->p_ + this->info_offset_);
}
// Return the soname -- for shared libraries only.
const char*
get_soname() const
{
gold_assert(this->type() == INCREMENTAL_INPUT_SHARED_LIBRARY);
unsigned int offset = Swap32::readval(this->inputs_->p_
+ this->info_offset_);
return this->inputs_->get_string(offset);
}
// Return the offset of the supplemental info for symbol SYMNDX --
// for objects only.
unsigned int
get_symbol_offset(unsigned int symndx) const
{
gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT
|| this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER);
unsigned int section_count = this->get_input_section_count();
return (this->info_offset_
+ this->object_info_size
+ section_count * this->input_section_entry_size
+ symndx * this->global_sym_entry_size);
}
// Return the global symbol count -- for objects & shared libraries only.
unsigned int
get_global_symbol_count() const
{
gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT
|| this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER
|| this->type() == INCREMENTAL_INPUT_SHARED_LIBRARY);
return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4);
}
// Return the offset of the first local symbol -- for objects only.
unsigned int
get_local_symbol_offset() const
{
gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT
|| this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER);
return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 8);
}
// Return the local symbol count -- for objects only.
unsigned int
get_local_symbol_count() const
{
gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT
|| this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER);
return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 12);
}
// Return the index of the first dynamic relocation -- for objects only.
unsigned int
get_first_dyn_reloc() const
{
gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT
|| this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER);
return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 16);
}
// Return the dynamic relocation count -- for objects only.
unsigned int
get_dyn_reloc_count() const
{
gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT
|| this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER);
return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 20);
}
// Return the COMDAT group count -- for objects only.
unsigned int
get_comdat_group_count() const
{
gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT
|| this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER);
return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 24);
}
// Return the object count -- for scripts only.
unsigned int
get_object_count() const
{
gold_assert(this->type() == INCREMENTAL_INPUT_SCRIPT);
return Swap32::readval(this->inputs_->p_ + this->info_offset_);
}
// Return the input file offset for object N -- for scripts only.
unsigned int
get_object_offset(unsigned int n) const
{
gold_assert(this->type() == INCREMENTAL_INPUT_SCRIPT);
return Swap32::readval(this->inputs_->p_ + this->info_offset_
+ 4 + n * 4);
}
// Return the member count -- for archives only.
unsigned int
get_member_count() const
{
gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE);
return Swap32::readval(this->inputs_->p_ + this->info_offset_);
}
// Return the unused symbol count -- for archives only.
unsigned int
get_unused_symbol_count() const
{
gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE);
return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4);
}
// Return the input file offset for archive member N -- for archives only.
unsigned int
get_member_offset(unsigned int n) const
{
gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE);
return Swap32::readval(this->inputs_->p_ + this->info_offset_
+ 8 + n * 4);
}
// Return the Nth unused global symbol -- for archives only.