// output.h -- manage the output file for gold -*- C++ -*-
+// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+
+// 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_OUTPUT_H
#define GOLD_OUTPUT_H
#include <vector>
#include "elfcpp.h"
+#include "mapfile.h"
#include "layout.h"
#include "reloc-types.h"
class Symbol;
class Output_file;
class Output_section;
+class Relocatable_relocs;
class Target;
template<int size, bool big_endian>
class Sized_target;
class Output_data
{
public:
- explicit Output_data(off_t data_size = 0)
- : address_(0), data_size_(data_size), offset_(-1)
+ explicit Output_data()
+ : address_(0), data_size_(0), offset_(-1),
+ is_address_valid_(false), is_data_size_valid_(false),
+ is_offset_valid_(false),
+ dynamic_reloc_count_(0)
{ }
virtual
~Output_data();
- // Return the address. This is only valid after Layout::finalize is
- // finished.
+ // Return the address. For allocated sections, this is only valid
+ // after Layout::finalize is finished.
uint64_t
address() const
- { return this->address_; }
+ {
+ gold_assert(this->is_address_valid_);
+ return this->address_;
+ }
- // Return the size of the data. This must be valid after
- // Layout::finalize calls set_address, but need not be valid before
- // then.
+ // Return the size of the data. For allocated sections, this must
+ // be valid after Layout::finalize calls set_address, but need not
+ // be valid before then.
off_t
data_size() const
- { return this->data_size_; }
+ {
+ gold_assert(this->is_data_size_valid_);
+ return this->data_size_;
+ }
// Return the file offset. This is only valid after
- // Layout::finalize is finished.
+ // Layout::finalize is finished. For some non-allocated sections,
+ // it may not be valid until near the end of the link.
off_t
offset() const
- { return this->offset_; }
+ {
+ gold_assert(this->is_offset_valid_);
+ return this->offset_;
+ }
+
+ // Reset the address and file offset. This essentially disables the
+ // sanity testing about duplicate and unknown settings.
+ void
+ reset_address_and_file_offset()
+ {
+ this->is_address_valid_ = false;
+ this->is_offset_valid_ = false;
+ this->is_data_size_valid_ = false;
+ this->do_reset_address_and_file_offset();
+ }
// Return the required alignment.
uint64_t
addralign() const
{ return this->do_addralign(); }
+ // Return whether this has a load address.
+ bool
+ has_load_address() const
+ { return this->do_has_load_address(); }
+
+ // Return the load address.
+ uint64_t
+ load_address() const
+ { return this->do_load_address(); }
+
// Return whether this is an Output_section.
bool
is_section() const
is_section_flag_set(elfcpp::Elf_Xword shf) const
{ return this->do_is_section_flag_set(shf); }
+ // Return the output section that this goes in, if there is one.
+ Output_section*
+ output_section()
+ { return this->do_output_section(); }
+
// Return the output section index, if there is an output section.
unsigned int
out_shndx() const
set_out_shndx(unsigned int shndx)
{ this->do_set_out_shndx(shndx); }
- // Set the address and file offset of this data. This is called
- // during Layout::finalize.
+ // Set the address and file offset of this data, and finalize the
+ // size of the data. This is called during Layout::finalize for
+ // allocated sections.
+ void
+ set_address_and_file_offset(uint64_t addr, off_t off)
+ {
+ this->set_address(addr);
+ this->set_file_offset(off);
+ this->finalize_data_size();
+ }
+
+ // Set the address.
+ void
+ set_address(uint64_t addr)
+ {
+ gold_assert(!this->is_address_valid_);
+ this->address_ = addr;
+ this->is_address_valid_ = true;
+ }
+
+ // Set the file offset.
+ void
+ set_file_offset(off_t off)
+ {
+ gold_assert(!this->is_offset_valid_);
+ this->offset_ = off;
+ this->is_offset_valid_ = true;
+ }
+
+ // Finalize the data size.
+ void
+ finalize_data_size()
+ {
+ if (!this->is_data_size_valid_)
+ {
+ // Tell the child class to set the data size.
+ this->set_final_data_size();
+ gold_assert(this->is_data_size_valid_);
+ }
+ }
+
+ // Set the TLS offset. Called only for SHT_TLS sections.
void
- set_address(uint64_t addr, off_t off);
+ set_tls_offset(uint64_t tls_base)
+ { this->do_set_tls_offset(tls_base); }
+
+ // Return the TLS offset, relative to the base of the TLS segment.
+ // Valid only for SHT_TLS sections.
+ uint64_t
+ tls_offset() const
+ { return this->do_tls_offset(); }
// Write the data to the output file. This is called after
// Layout::finalize is complete.
write(Output_file* file)
{ this->do_write(file); }
- // This is called by Layout::finalize to note that all sizes must
- // now be fixed.
+ // This is called by Layout::finalize to note that the sizes of
+ // allocated sections must now be fixed.
static void
layout_complete()
- { Output_data::sizes_are_fixed = true; }
+ { Output_data::allocated_sizes_are_fixed = true; }
+
+ // Used to check that layout has been done.
+ static bool
+ is_layout_complete()
+ { return Output_data::allocated_sizes_are_fixed; }
+
+ // Count the number of dynamic relocations applied to this section.
+ void
+ add_dynamic_reloc()
+ { ++this->dynamic_reloc_count_; }
+
+ // Return the number of dynamic relocations applied to this section.
+ unsigned int
+ dynamic_reloc_count() const
+ { return this->dynamic_reloc_count_; }
+
+ // Whether the address is valid.
+ bool
+ is_address_valid() const
+ { return this->is_address_valid_; }
+
+ // Whether the file offset is valid.
+ bool
+ is_offset_valid() const
+ { return this->is_offset_valid_; }
+
+ // Whether the data size is valid.
+ bool
+ is_data_size_valid() const
+ { return this->is_data_size_valid_; }
+
+ // Print information to the map file.
+ void
+ print_to_mapfile(Mapfile* mapfile) const
+ { return this->do_print_to_mapfile(mapfile); }
protected:
// Functions that child classes may or in some cases must implement.
virtual uint64_t
do_addralign() const = 0;
+ // Return whether this has a load address.
+ virtual bool
+ do_has_load_address() const
+ { return false; }
+
+ // Return the load address.
+ virtual uint64_t
+ do_load_address() const
+ { gold_unreachable(); }
+
// Return whether this is an Output_section.
virtual bool
do_is_section() const
do_is_section_flag_set(elfcpp::Elf_Xword) const
{ return false; }
+ // Return the output section, if there is one.
+ virtual Output_section*
+ do_output_section()
+ { return NULL; }
+
// Return the output section index, if there is an output section.
virtual unsigned int
do_out_shndx() const
do_set_out_shndx(unsigned int)
{ gold_unreachable(); }
- // Set the address and file offset of the data. This only needs to
- // be implemented if the child needs to know. The child class can
- // set its size in this call.
+ // This is a hook for derived classes to set the data size. This is
+ // called by finalize_data_size, normally called during
+ // Layout::finalize, when the section address is set.
virtual void
- do_set_address(uint64_t, off_t)
+ set_final_data_size()
+ { gold_unreachable(); }
+
+ // A hook for resetting the address and file offset.
+ virtual void
+ do_reset_address_and_file_offset()
{ }
+ // Set the TLS offset. Called only for SHT_TLS sections.
+ virtual void
+ do_set_tls_offset(uint64_t)
+ { gold_unreachable(); }
+
+ // Return the TLS offset, relative to the base of the TLS segment.
+ // Valid only for SHT_TLS sections.
+ virtual uint64_t
+ do_tls_offset() const
+ { gold_unreachable(); }
+
+ // Print to the map file. This only needs to be implemented by
+ // classes which may appear in a PT_LOAD segment.
+ virtual void
+ do_print_to_mapfile(Mapfile*) const
+ { gold_unreachable(); }
+
// Functions that child classes may call.
+ // Reset the address. The Output_section class needs this when an
+ // SHF_ALLOC input section is added to an output section which was
+ // formerly not SHF_ALLOC.
+ void
+ mark_address_invalid()
+ { this->is_address_valid_ = false; }
+
// Set the size of the data.
void
set_data_size(off_t data_size)
{
- gold_assert(!Output_data::sizes_are_fixed);
+ gold_assert(!this->is_data_size_valid_);
+ this->data_size_ = data_size;
+ this->is_data_size_valid_ = true;
+ }
+
+ // Get the current data size--this is for the convenience of
+ // sections which build up their size over time.
+ off_t
+ current_data_size_for_child() const
+ { return this->data_size_; }
+
+ // Set the current data size--this is for the convenience of
+ // sections which build up their size over time.
+ void
+ set_current_data_size_for_child(off_t data_size)
+ {
+ gold_assert(!this->is_data_size_valid_);
this->data_size_ = data_size;
}
- // Return default alignment for a size--32 or 64.
+ // Return default alignment for the target size.
+ static uint64_t
+ default_alignment();
+
+ // Return default alignment for a specified size--32 or 64.
static uint64_t
- default_alignment(int size);
+ default_alignment_for_size(int size);
private:
Output_data(const Output_data&);
Output_data& operator=(const Output_data&);
// This is used for verification, to make sure that we don't try to
- // change any sizes after we set the section addresses.
- static bool sizes_are_fixed;
+ // change any sizes of allocated sections after we set the section
+ // addresses.
+ static bool allocated_sizes_are_fixed;
- // Memory address in file (not always meaningful).
+ // Memory address in output file.
uint64_t address_;
- // Size of data in file.
+ // Size of data in output file.
off_t data_size_;
- // Offset within file.
+ // File offset of contents in output file.
off_t offset_;
+ // Whether address_ is valid.
+ bool is_address_valid_;
+ // Whether data_size_ is valid.
+ bool is_data_size_valid_;
+ // Whether offset_ is valid.
+ bool is_offset_valid_;
+ // Count of dynamic relocations applied to this section.
+ unsigned int dynamic_reloc_count_;
};
// Output the section headers.
class Output_section_headers : public Output_data
{
public:
- Output_section_headers(int size,
- bool big_endian,
- const Layout::Segment_list&,
- const Layout::Section_list&,
- const Stringpool*);
+ Output_section_headers(const Layout*,
+ const Layout::Segment_list*,
+ const Layout::Section_list*,
+ const Layout::Section_list*,
+ const Stringpool*,
+ const Output_section*);
+ protected:
// Write the data to the file.
void
do_write(Output_file*);
// Return the required alignment.
uint64_t
do_addralign() const
- { return Output_data::default_alignment(this->size_); }
+ { return Output_data::default_alignment(); }
+
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _("** section headers")); }
private:
// Write the data to the file with the right size and endianness.
void
do_sized_write(Output_file*);
- int size_;
- bool big_endian_;
- const Layout::Segment_list& segment_list_;
- const Layout::Section_list& unattached_section_list_;
+ const Layout* layout_;
+ const Layout::Segment_list* segment_list_;
+ const Layout::Section_list* section_list_;
+ const Layout::Section_list* unattached_section_list_;
const Stringpool* secnamepool_;
+ const Output_section* shstrtab_section_;
};
// Output the segment headers.
class Output_segment_headers : public Output_data
{
public:
- Output_segment_headers(int size, bool big_endian,
- const Layout::Segment_list& segment_list);
+ Output_segment_headers(const Layout::Segment_list& segment_list);
+ protected:
// Write the data to the file.
void
do_write(Output_file*);
// Return the required alignment.
uint64_t
do_addralign() const
- { return Output_data::default_alignment(this->size_); }
+ { return Output_data::default_alignment(); }
+
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _("** segment headers")); }
private:
// Write the data to the file with the right size and endianness.
void
do_sized_write(Output_file*);
- int size_;
- bool big_endian_;
const Layout::Segment_list& segment_list_;
};
class Output_file_header : public Output_data
{
public:
- Output_file_header(int size,
- bool big_endian,
- const General_options&,
- const Target*,
+ Output_file_header(const Target*,
const Symbol_table*,
- const Output_segment_headers*);
+ const Output_segment_headers*,
+ const char* entry);
// Add information about the section headers. We lay out the ELF
// file header before we create the section headers.
void set_section_info(const Output_section_headers*,
const Output_section* shstrtab);
+ protected:
// Write the data to the file.
void
do_write(Output_file*);
// Return the required alignment.
uint64_t
do_addralign() const
- { return Output_data::default_alignment(this->size_); }
+ { return Output_data::default_alignment(); }
- // Set the address and offset--we only implement this for error
- // checking.
+ // Write to a map file.
void
- do_set_address(uint64_t, off_t off) const
- { gold_assert(off == 0); }
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _("** file header")); }
private:
// Write the data to the file with the right size and endianness.
void
do_sized_write(Output_file*);
- int size_;
- bool big_endian_;
- const General_options& options_;
+ // Return the value to use for the entry address.
+ template<int size>
+ typename elfcpp::Elf_types<size>::Elf_Addr
+ entry();
+
const Target* target_;
const Symbol_table* symtab_;
const Output_segment_headers* segment_header_;
const Output_section_headers* section_header_;
const Output_section* shstrtab_;
+ const char* entry_;
};
// Output sections are mainly comprised of input sections. However,
{
public:
Output_section_data(off_t data_size, uint64_t addralign)
- : Output_data(data_size), output_section_(NULL), addralign_(addralign)
- { }
+ : Output_data(), output_section_(NULL), addralign_(addralign)
+ { this->set_data_size(data_size); }
Output_section_data(uint64_t addralign)
- : Output_data(0), output_section_(NULL), addralign_(addralign)
+ : Output_data(), output_section_(NULL), addralign_(addralign)
{ }
+ // Return the output section.
+ const Output_section*
+ output_section() const
+ { return this->output_section_; }
+
// Record the output section.
void
- set_output_section(Output_section* os)
- {
- gold_assert(this->output_section_ == NULL);
- this->output_section_ = os;
- }
+ set_output_section(Output_section* os);
+
+ // Add an input section, for SHF_MERGE sections. This returns true
+ // if the section was handled.
+ bool
+ add_input_section(Relobj* object, unsigned int shndx)
+ { return this->do_add_input_section(object, shndx); }
+
+ // Given an input OBJECT, an input section index SHNDX within that
+ // object, and an OFFSET relative to the start of that input
+ // section, return whether or not the corresponding offset within
+ // the output section is known. If this function returns true, it
+ // sets *POUTPUT to the output offset. The value -1 indicates that
+ // this input offset is being discarded.
+ bool
+ output_offset(const Relobj* object, unsigned int shndx,
+ section_offset_type offset,
+ section_offset_type *poutput) const
+ { return this->do_output_offset(object, shndx, offset, poutput); }
+
+ // Return whether this is the merge section for the input section
+ // SHNDX in OBJECT. This should return true when output_offset
+ // would return true for some values of OFFSET.
+ bool
+ is_merge_section_for(const Relobj* object, unsigned int shndx) const
+ { return this->do_is_merge_section_for(object, shndx); }
+
+ // Write the contents to a buffer. This is used for sections which
+ // require postprocessing, such as compression.
+ void
+ write_to_buffer(unsigned char* buffer)
+ { this->do_write_to_buffer(buffer); }
+
+ // Print merge stats to stderr. This should only be called for
+ // SHF_MERGE sections.
+ void
+ print_merge_stats(const char* section_name)
+ { this->do_print_merge_stats(section_name); }
protected:
// The child class must implement do_write.
+ // The child class may implement specific adjustments to the output
+ // section.
+ virtual void
+ do_adjust_output_section(Output_section*)
+ { }
+
+ // May be implemented by child class. Return true if the section
+ // was handled.
+ virtual bool
+ do_add_input_section(Relobj*, unsigned int)
+ { gold_unreachable(); }
+
+ // The child class may implement output_offset.
+ virtual bool
+ do_output_offset(const Relobj*, unsigned int, section_offset_type,
+ section_offset_type*) const
+ { return false; }
+
+ // The child class may implement is_merge_section_for.
+ virtual bool
+ do_is_merge_section_for(const Relobj*, unsigned int) const
+ { return false; }
+
+ // The child class may implement write_to_buffer. Most child
+ // classes can not appear in a compressed section, and they do not
+ // implement this.
+ virtual void
+ do_write_to_buffer(unsigned char*)
+ { gold_unreachable(); }
+
+ // Print merge statistics.
+ virtual void
+ do_print_merge_stats(const char*)
+ { gold_unreachable(); }
+
// Return the required alignment.
uint64_t
do_addralign() const
{ return this->addralign_; }
+ // Return the output section.
+ Output_section*
+ do_output_section()
+ { return this->output_section_; }
+
// Return the section index of the output section.
unsigned int
do_out_shndx() const;
// Set the alignment.
void
- set_addralign(uint64_t addralign)
- { this->addralign_ = addralign; }
+ set_addralign(uint64_t addralign);
private:
// The output section for this section.
- const Output_section* output_section_;
+ Output_section* output_section_;
// The required alignment.
uint64_t addralign_;
};
+// Some Output_section_data classes build up their data step by step,
+// rather than all at once. This class provides an interface for
+// them.
+
+class Output_section_data_build : public Output_section_data
+{
+ public:
+ Output_section_data_build(uint64_t addralign)
+ : Output_section_data(addralign)
+ { }
+
+ // Get the current data size.
+ off_t
+ current_data_size() const
+ { return this->current_data_size_for_child(); }
+
+ // Set the current data size.
+ void
+ set_current_data_size(off_t data_size)
+ { this->set_current_data_size_for_child(data_size); }
+
+ protected:
+ // Set the final data size.
+ virtual void
+ set_final_data_size()
+ { this->set_data_size(this->current_data_size_for_child()); }
+};
+
// A simple case of Output_data in which we have constant data to
// output.
data_(reinterpret_cast<const char*>(p), len)
{ }
- // Add more data.
- void
- add_data(const std::string& add)
- {
- this->data_.append(add);
- this->set_data_size(this->data_.size());
- }
-
+ protected:
// Write the data to the output file.
void
do_write(Output_file*);
+ // Write the data to a buffer.
+ void
+ do_write_to_buffer(unsigned char* buffer)
+ { memcpy(buffer, this->data_.data(), this->data_.size()); }
+
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _("** fill")); }
+
private:
std::string data_;
};
{
public:
Output_data_const_buffer(const unsigned char* p, off_t len,
- uint64_t addralign)
- : Output_section_data(len, addralign), p_(p)
+ uint64_t addralign, const char* map_name)
+ : Output_section_data(len, addralign),
+ p_(p), map_name_(map_name)
{ }
+ protected:
// Write the data the output file.
void
do_write(Output_file*);
+ // Write the data to a buffer.
+ void
+ do_write_to_buffer(unsigned char* buffer)
+ { memcpy(buffer, this->p_, this->data_size()); }
+
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _(this->map_name_)); }
+
private:
+ // The data to output.
const unsigned char* p_;
+ // Name to use in a map file. Maps are a rarely used feature, but
+ // the space usage is minor as aren't very many of these objects.
+ const char* map_name_;
};
-// A place holder for data written out via some other mechanism.
+// A place holder for a fixed amount of data written out via some
+// other mechanism.
-class Output_data_space : public Output_section_data
+class Output_data_fixed_space : public Output_section_data
{
public:
- Output_data_space(off_t data_size, uint64_t addralign)
- : Output_section_data(data_size, addralign)
+ Output_data_fixed_space(off_t data_size, uint64_t addralign,
+ const char* map_name)
+ : Output_section_data(data_size, addralign),
+ map_name_(map_name)
{ }
- explicit Output_data_space(uint64_t addralign)
- : Output_section_data(addralign)
+ protected:
+ // Write out the data--the actual data must be written out
+ // elsewhere.
+ void
+ do_write(Output_file*)
{ }
- // Set the size.
+ // Write to a map file.
void
- set_space_size(off_t space_size)
- { this->set_data_size(space_size); }
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _(this->map_name_)); }
+
+ private:
+ // Name to use in a map file. Maps are a rarely used feature, but
+ // the space usage is minor as aren't very many of these objects.
+ const char* map_name_;
+};
+
+// A place holder for variable sized data written out via some other
+// mechanism.
+
+class Output_data_space : public Output_section_data_build
+{
+ public:
+ explicit Output_data_space(uint64_t addralign, const char* map_name)
+ : Output_section_data_build(addralign),
+ map_name_(map_name)
+ { }
// Set the alignment.
void
set_space_alignment(uint64_t align)
{ this->set_addralign(align); }
- // Write out the data--this must be handled elsewhere.
+ protected:
+ // Write out the data--the actual data must be written out
+ // elsewhere.
+ void
+ do_write(Output_file*)
+ { }
+
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _(this->map_name_)); }
+
+ private:
+ // Name to use in a map file. Maps are a rarely used feature, but
+ // the space usage is minor as aren't very many of these objects.
+ const char* map_name_;
+};
+
+// Fill fixed space with zeroes. This is just like
+// Output_data_fixed_space, except that the map name is known.
+
+class Output_data_zero_fill : public Output_section_data
+{
+ public:
+ Output_data_zero_fill(off_t data_size, uint64_t addralign)
+ : Output_section_data(data_size, addralign)
+ { }
+
+ protected:
+ // There is no data to write out.
void
do_write(Output_file*)
{ }
+
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, "** zero fill"); }
};
// A string table which goes into an output section.
: Output_section_data(1), strtab_(strtab)
{ }
+ protected:
// This is called to set the address and file offset. Here we make
// sure that the Stringpool is finalized.
void
- do_set_address(uint64_t, off_t);
+ set_final_data_size();
// Write out the data.
void
do_write(Output_file*);
+ // Write the data to a buffer.
+ void
+ do_write_to_buffer(unsigned char* buffer)
+ { this->strtab_->write_to_buffer(buffer, this->data_size()); }
+
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _("** string table")); }
+
private:
Stringpool* strtab_;
};
// or elfcpp::SHT_RELA, and also on whether this is a dynamic
// relocation or an ordinary relocation.
-// A relocation can be against a global symbol, a local symbol, an
-// output section, or the undefined symbol at index 0. We represent
-// the latter by using a NULL global symbol.
+// A relocation can be against a global symbol, a local symbol, a
+// local section symbol, an output section, or the undefined symbol at
+// index 0. We represent the latter by using a NULL global symbol.
template<int sh_type, bool dynamic, int size, bool big_endian>
class Output_reloc;
{
public:
typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Addend;
+
+ static const Address invalid_address = static_cast<Address>(0) - 1;
// An uninitialized entry. We need this because we want to put
// instances of this class into an STL container.
: local_sym_index_(INVALID_CODE)
{ }
+ // We have a bunch of different constructors. They come in pairs
+ // depending on how the address of the relocation is specified. It
+ // can either be an offset in an Output_data or an offset in an
+ // input section.
+
// A reloc against a global symbol.
Output_reloc(Symbol* gsym, unsigned int type, Output_data* od,
- Address address)
- : address_(address), local_sym_index_(GSYM_CODE), type_(type),
- shndx_(INVALID_CODE)
- {
- this->u1_.gsym = gsym;
- this->u2_.od = od;
- }
+ Address address, bool is_relative);
- Output_reloc(Symbol* gsym, unsigned int type, Relobj* relobj,
- unsigned int shndx, Address address)
- : address_(address), local_sym_index_(GSYM_CODE), type_(type),
- shndx_(shndx)
- {
- gold_assert(shndx != INVALID_CODE);
- this->u1_.gsym = gsym;
- this->u2_.relobj = relobj;
- }
+ Output_reloc(Symbol* gsym, unsigned int type,
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address, bool is_relative);
- // A reloc against a local symbol.
+ // A reloc against a local symbol or local section symbol.
Output_reloc(Sized_relobj<size, big_endian>* relobj,
- unsigned int local_sym_index,
- unsigned int type,
- Output_data* od,
- Address address)
- : address_(address), local_sym_index_(local_sym_index), type_(type),
- shndx_(INVALID_CODE)
- {
- gold_assert(local_sym_index != GSYM_CODE
- && local_sym_index != INVALID_CODE);
- this->u1_.relobj = relobj;
- this->u2_.od = od;
- }
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, Address address, bool is_relative,
+ bool is_section_symbol);
Output_reloc(Sized_relobj<size, big_endian>* relobj,
- unsigned int local_sym_index,
- unsigned int type,
- unsigned int shndx,
- Address address)
- : address_(address), local_sym_index_(local_sym_index), type_(type),
- shndx_(shndx)
- {
- gold_assert(local_sym_index != GSYM_CODE
- && local_sym_index != INVALID_CODE);
- gold_assert(shndx != INVALID_CODE);
- this->u1_.relobj = relobj;
- this->u2_.relobj = relobj;
- }
+ unsigned int local_sym_index, unsigned int type,
+ unsigned int shndx, Address address, bool is_relative,
+ bool is_section_symbol);
// A reloc against the STT_SECTION symbol of an output section.
Output_reloc(Output_section* os, unsigned int type, Output_data* od,
- Address address)
- : address_(address), local_sym_index_(SECTION_CODE), type_(type),
- shndx_(INVALID_CODE)
- {
- this->u1_.os = os;
- this->u2_.od = od;
- }
+ Address address);
+
+ Output_reloc(Output_section* os, unsigned int type,
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address);
+
+ // Return TRUE if this is a RELATIVE relocation.
+ bool
+ is_relative() const
+ { return this->is_relative_; }
- Output_reloc(Output_section* os, unsigned int type, Relobj* relobj,
- unsigned int shndx, Address address)
- : address_(address), local_sym_index_(SECTION_CODE), type_(type),
- shndx_(shndx)
+ // Return whether this is against a local section symbol.
+ bool
+ is_local_section_symbol() const
{
- gold_assert(shndx != INVALID_CODE);
- this->u1_.os = os;
- this->u2_.relobj = relobj;
+ return (this->local_sym_index_ != GSYM_CODE
+ && this->local_sym_index_ != SECTION_CODE
+ && this->local_sym_index_ != INVALID_CODE
+ && this->is_section_symbol_);
}
+ // For a local section symbol, return the offset of the input
+ // section within the output section. ADDEND is the addend being
+ // applied to the input section.
+ Address
+ local_section_offset(Addend addend) const;
+
+ // Get the value of the symbol referred to by a Rel relocation when
+ // we are adding the given ADDEND.
+ Address
+ symbol_value(Addend addend) const;
+
// Write the reloc entry to an output view.
void
write(unsigned char* pov) const;
template<typename Write_rel>
void write_rel(Write_rel*) const;
+ // This is used when sorting dynamic relocs. Return -1 to sort this
+ // reloc before R2, 0 to sort the same as R2, 1 to sort after R2.
+ int
+ compare(const Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>& r2)
+ const;
+
+ // Return whether this reloc should be sorted before the argument
+ // when sorting dynamic relocs.
+ bool
+ sort_before(const Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>&
+ r2) const
+ { return this->compare(r2) < 0; }
+
private:
- // Return the symbol index. We can't do a double template
- // specialization, so we do a secondary template here.
+ // Record that we need a dynamic symbol index.
+ void
+ set_needs_dynsym_index();
+
+ // Return the symbol index.
unsigned int
get_symbol_index() const;
+ // Return the output address.
+ Address
+ get_address() const;
+
// Codes for local_sym_index_.
enum
{
union
{
- // For a local symbol, the object. We will never generate a
- // relocation against a local symbol in a dynamic object; that
- // doesn't make sense. And our callers will always be
- // templatized, so we use Sized_relobj here.
+ // For a local symbol or local section symbol
+ // (this->local_sym_index_ >= 0), the object. We will never
+ // generate a relocation against a local symbol in a dynamic
+ // object; that doesn't make sense. And our callers will always
+ // be templatized, so we use Sized_relobj here.
Sized_relobj<size, big_endian>* relobj;
- // For a global symbol, the symbol. If this is NULL, it indicates
- // a relocation against the undefined 0 symbol.
+ // For a global symbol (this->local_sym_index_ == GSYM_CODE, the
+ // symbol. If this is NULL, it indicates a relocation against the
+ // undefined 0 symbol.
Symbol* gsym;
- // For a relocation against an output section, the output section.
+ // For a relocation against an output section
+ // (this->local_sym_index_ == SECTION_CODE), the output section.
Output_section* os;
} u1_;
union
{
- // If shndx_ is not INVALID CODE, the object which holds the input
- // section being used to specify the reloc address.
- Relobj* relobj;
- // If shndx_ is INVALID_CODE, the output data being used to
+ // If this->shndx_ is not INVALID CODE, the object which holds the
+ // input section being used to specify the reloc address.
+ Sized_relobj<size, big_endian>* relobj;
+ // If this->shndx_ is INVALID_CODE, the output data being used to
// specify the reloc address. This may be NULL if the reloc
// address is absolute.
Output_data* od;
} u2_;
// The address offset within the input section or the Output_data.
Address address_;
- // For a local symbol, the local symbol index. This is GSYM_CODE
- // for a global symbol, or INVALID_CODE for an uninitialized value.
+ // This is GSYM_CODE for a global symbol, or SECTION_CODE for a
+ // relocation against an output section, or INVALID_CODE for an
+ // uninitialized value. Otherwise, for a local symbol
+ // (this->is_section_symbol_ is false), the local symbol index. For
+ // a local section symbol (this->is_section_symbol_ is true), the
+ // section index in the input file.
unsigned int local_sym_index_;
// The reloc type--a processor specific code.
- unsigned int type_;
+ unsigned int type_ : 30;
+ // True if the relocation is a RELATIVE relocation.
+ bool is_relative_ : 1;
+ // True if the relocation is against a section symbol.
+ bool is_section_symbol_ : 1;
// If the reloc address is an input section in an object, the
// section index. This is INVALID_CODE if the reloc address is
// specified in some other way.
// A reloc against a global symbol.
Output_reloc(Symbol* gsym, unsigned int type, Output_data* od,
- Address address, Addend addend)
- : rel_(gsym, type, od, address), addend_(addend)
+ Address address, Addend addend, bool is_relative)
+ : rel_(gsym, type, od, address, is_relative), addend_(addend)
{ }
- Output_reloc(Symbol* gsym, unsigned int type, Relobj* relobj,
- unsigned int shndx, Address address, Addend addend)
- : rel_(gsym, type, relobj, shndx, address), addend_(addend)
+ Output_reloc(Symbol* gsym, unsigned int type,
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address, Addend addend,
+ bool is_relative)
+ : rel_(gsym, type, relobj, shndx, address, is_relative), addend_(addend)
{ }
// A reloc against a local symbol.
Output_reloc(Sized_relobj<size, big_endian>* relobj,
- unsigned int local_sym_index,
- unsigned int type, Output_data* od, Address address,
- Addend addend)
- : rel_(relobj, local_sym_index, type, od, address), addend_(addend)
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, Address address,
+ Addend addend, bool is_relative, bool is_section_symbol)
+ : rel_(relobj, local_sym_index, type, od, address, is_relative,
+ is_section_symbol),
+ addend_(addend)
{ }
Output_reloc(Sized_relobj<size, big_endian>* relobj,
- unsigned int local_sym_index,
- unsigned int type,
- unsigned int shndx,
- Address address,
- Addend addend)
- : rel_(relobj, local_sym_index, type, shndx, address),
+ unsigned int local_sym_index, unsigned int type,
+ unsigned int shndx, Address address,
+ Addend addend, bool is_relative, bool is_section_symbol)
+ : rel_(relobj, local_sym_index, type, shndx, address, is_relative,
+ is_section_symbol),
addend_(addend)
{ }
: rel_(os, type, od, address), addend_(addend)
{ }
- Output_reloc(Output_section* os, unsigned int type, Relobj* relobj,
+ Output_reloc(Output_section* os, unsigned int type,
+ Sized_relobj<size, big_endian>* relobj,
unsigned int shndx, Address address, Addend addend)
: rel_(os, type, relobj, shndx, address), addend_(addend)
{ }
void
write(unsigned char* pov) const;
+ // Return whether this reloc should be sorted before the argument
+ // when sorting dynamic relocs.
+ bool
+ sort_before(const Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>&
+ r2) const
+ {
+ int i = this->rel_.compare(r2.rel_);
+ if (i < 0)
+ return true;
+ else if (i > 0)
+ return false;
+ else
+ return this->addend_ < r2.addend_;
+ }
+
private:
// The basic reloc.
Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> rel_;
// the reloc type.
template<int sh_type, bool dynamic, int size, bool big_endian>
-class Output_data_reloc_base : public Output_section_data
+class Output_data_reloc_base : public Output_section_data_build
{
public:
typedef Output_reloc<sh_type, dynamic, size, big_endian> Output_reloc_type;
Reloc_types<sh_type, size, big_endian>::reloc_size;
// Construct the section.
- Output_data_reloc_base()
- : Output_section_data(Output_data::default_alignment(size))
+ Output_data_reloc_base(bool sort_relocs)
+ : Output_section_data_build(Output_data::default_alignment_for_size(size)),
+ sort_relocs_(sort_relocs)
{ }
+ protected:
// Write out the data.
void
do_write(Output_file*);
- protected:
+ // Set the entry size and the link.
+ void
+ do_adjust_output_section(Output_section *os);
+
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ {
+ mapfile->print_output_data(this,
+ (dynamic
+ ? _("** dynamic relocs")
+ : _("** relocs")));
+ }
+
// Add a relocation entry.
void
- add(const Output_reloc_type& reloc)
+ add(Output_data *od, const Output_reloc_type& reloc)
{
this->relocs_.push_back(reloc);
- this->set_data_size(this->relocs_.size() * reloc_size);
+ this->set_current_data_size(this->relocs_.size() * reloc_size);
+ od->add_dynamic_reloc();
}
private:
typedef std::vector<Output_reloc_type> Relocs;
+ // The class used to sort the relocations.
+ struct Sort_relocs_comparison
+ {
+ bool
+ operator()(const Output_reloc_type& r1, const Output_reloc_type& r2) const
+ { return r1.sort_before(r2); }
+ };
+
+ // The relocations in this section.
Relocs relocs_;
+ // Whether to sort the relocations when writing them out, to make
+ // the dynamic linker more efficient.
+ bool sort_relocs_;
};
// The class which callers actually create.
class Output_data_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>
: public Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, big_endian>
{
- private:
+ private:
typedef Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size,
big_endian> Base;
typedef typename Base::Output_reloc_type Output_reloc_type;
typedef typename Output_reloc_type::Address Address;
- Output_data_reloc()
- : Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, big_endian>()
+ Output_data_reloc(bool sr)
+ : Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, big_endian>(sr)
{ }
// Add a reloc against a global symbol.
void
add_global(Symbol* gsym, unsigned int type, Output_data* od, Address address)
- { this->add(Output_reloc_type(gsym, type, od, address)); }
+ { this->add(od, Output_reloc_type(gsym, type, od, address, false)); }
void
- add_global(Symbol* gsym, unsigned int type, Relobj* relobj,
+ add_global(Symbol* gsym, unsigned int type, Output_data* od,
+ Sized_relobj<size, big_endian>* relobj,
unsigned int shndx, Address address)
- { this->add(Output_reloc_type(gsym, type, relobj, shndx, address)); }
+ { this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
+ false)); }
- // Add a reloc against a local symbol.
+ // These are to simplify the Copy_relocs class.
void
- add_local(Sized_relobj<size, big_endian>* relobj,
- unsigned int local_sym_index, unsigned int type,
- Output_data* od, Address address)
- { this->add(Output_reloc_type(relobj, local_sym_index, type, od, address)); }
+ add_global(Symbol* gsym, unsigned int type, Output_data* od, Address address,
+ Address addend)
+ {
+ gold_assert(addend == 0);
+ this->add_global(gsym, type, od, address);
+ }
void
- add_local(Sized_relobj<size, big_endian>* relobj,
- unsigned int local_sym_index, unsigned int type,
- unsigned int shndx, Address address)
- { this->add(Output_reloc_type(relobj, local_sym_index, type, shndx,
- address)); }
-
+ add_global(Symbol* gsym, unsigned int type, Output_data* od,
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address, Address addend)
+ {
+ gold_assert(addend == 0);
+ this->add_global(gsym, type, od, relobj, shndx, address);
+ }
- // A reloc against the STT_SECTION symbol of an output section.
+ // Add a RELATIVE reloc against a global symbol. The final relocation
+ // will not reference the symbol.
void
- add_output_section(Output_section* os, unsigned int type,
- Output_data* od, Address address)
- { this->add(Output_reloc_type(os, type, od, address)); }
+ add_global_relative(Symbol* gsym, unsigned int type, Output_data* od,
+ Address address)
+ { this->add(od, Output_reloc_type(gsym, type, od, address, true)); }
void
- add_output_section(Output_section* os, unsigned int type,
- Relobj* relobj, unsigned int shndx, Address address)
- { this->add(Output_reloc_type(os, type, relobj, shndx, address)); }
-};
+ add_global_relative(Symbol* gsym, unsigned int type, Output_data* od,
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address)
+ {
+ this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
+ true));
+ }
+
+ // Add a reloc against a local symbol.
+
+ void
+ add_local(Sized_relobj<size, big_endian>* relobj,
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, Address address)
+ {
+ this->add(od, Output_reloc_type(relobj, local_sym_index, type, od,
+ address, false, false));
+ }
+
+ void
+ add_local(Sized_relobj<size, big_endian>* relobj,
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, unsigned int shndx, Address address)
+ {
+ this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx,
+ address, false, false));
+ }
+
+ // Add a RELATIVE reloc against a local symbol.
+
+ void
+ add_local_relative(Sized_relobj<size, big_endian>* relobj,
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, Address address)
+ {
+ this->add(od, Output_reloc_type(relobj, local_sym_index, type, od,
+ address, true, false));
+ }
+
+ void
+ add_local_relative(Sized_relobj<size, big_endian>* relobj,
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, unsigned int shndx, Address address)
+ {
+ this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx,
+ address, true, false));
+ }
+
+ // Add a reloc against a local section symbol. This will be
+ // converted into a reloc against the STT_SECTION symbol of the
+ // output section.
+
+ void
+ add_local_section(Sized_relobj<size, big_endian>* relobj,
+ unsigned int input_shndx, unsigned int type,
+ Output_data* od, Address address)
+ {
+ this->add(od, Output_reloc_type(relobj, input_shndx, type, od,
+ address, false, true));
+ }
+
+ void
+ add_local_section(Sized_relobj<size, big_endian>* relobj,
+ unsigned int input_shndx, unsigned int type,
+ Output_data* od, unsigned int shndx, Address address)
+ {
+ this->add(od, Output_reloc_type(relobj, input_shndx, type, shndx,
+ address, false, true));
+ }
+
+ // A reloc against the STT_SECTION symbol of an output section.
+ // OS is the Output_section that the relocation refers to; OD is
+ // the Output_data object being relocated.
+
+ void
+ add_output_section(Output_section* os, unsigned int type,
+ Output_data* od, Address address)
+ { this->add(od, Output_reloc_type(os, type, od, address)); }
+
+ void
+ add_output_section(Output_section* os, unsigned int type, Output_data* od,
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address)
+ { this->add(od, Output_reloc_type(os, type, relobj, shndx, address)); }
+};
// The SHT_RELA version of Output_data_reloc.
class Output_data_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>
: public Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, big_endian>
{
- private:
+ private:
typedef Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size,
big_endian> Base;
typedef typename Output_reloc_type::Address Address;
typedef typename Output_reloc_type::Addend Addend;
- Output_data_reloc()
- : Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, big_endian>()
+ Output_data_reloc(bool sr)
+ : Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, big_endian>(sr)
{ }
// Add a reloc against a global symbol.
void
add_global(Symbol* gsym, unsigned int type, Output_data* od,
Address address, Addend addend)
- { this->add(Output_reloc_type(gsym, type, od, address, addend)); }
+ { this->add(od, Output_reloc_type(gsym, type, od, address, addend,
+ false)); }
+
+ void
+ add_global(Symbol* gsym, unsigned int type, Output_data* od,
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address,
+ Addend addend)
+ { this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
+ addend, false)); }
+
+ // Add a RELATIVE reloc against a global symbol. The final output
+ // relocation will not reference the symbol, but we must keep the symbol
+ // information long enough to set the addend of the relocation correctly
+ // when it is written.
void
- add_global(Symbol* gsym, unsigned int type, Relobj* relobj,
- unsigned int shndx, Address address, Addend addend)
- { this->add(Output_reloc_type(gsym, type, relobj, shndx, address, addend)); }
+ add_global_relative(Symbol* gsym, unsigned int type, Output_data* od,
+ Address address, Addend addend)
+ { this->add(od, Output_reloc_type(gsym, type, od, address, addend, true)); }
+
+ void
+ add_global_relative(Symbol* gsym, unsigned int type, Output_data* od,
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address, Addend addend)
+ { this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
+ addend, true)); }
// Add a reloc against a local symbol.
unsigned int local_sym_index, unsigned int type,
Output_data* od, Address address, Addend addend)
{
- this->add(Output_reloc_type(relobj, local_sym_index, type, od, address,
- addend));
+ this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, address,
+ addend, false, false));
}
void
add_local(Sized_relobj<size, big_endian>* relobj,
unsigned int local_sym_index, unsigned int type,
- unsigned int shndx, Address address, Addend addend)
+ Output_data* od, unsigned int shndx, Address address,
+ Addend addend)
+ {
+ this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx,
+ address, addend, false, false));
+ }
+
+ // Add a RELATIVE reloc against a local symbol.
+
+ void
+ add_local_relative(Sized_relobj<size, big_endian>* relobj,
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, Address address, Addend addend)
{
- this->add(Output_reloc_type(relobj, local_sym_index, type, shndx, address,
- addend));
+ this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, address,
+ addend, true, false));
+ }
+
+ void
+ add_local_relative(Sized_relobj<size, big_endian>* relobj,
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, unsigned int shndx, Address address,
+ Addend addend)
+ {
+ this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx,
+ address, addend, true, false));
+ }
+
+ // Add a reloc against a local section symbol. This will be
+ // converted into a reloc against the STT_SECTION symbol of the
+ // output section.
+
+ void
+ add_local_section(Sized_relobj<size, big_endian>* relobj,
+ unsigned int input_shndx, unsigned int type,
+ Output_data* od, Address address, Addend addend)
+ {
+ this->add(od, Output_reloc_type(relobj, input_shndx, type, od, address,
+ addend, false, true));
+ }
+
+ void
+ add_local_section(Sized_relobj<size, big_endian>* relobj,
+ unsigned int input_shndx, unsigned int type,
+ Output_data* od, unsigned int shndx, Address address,
+ Addend addend)
+ {
+ this->add(od, Output_reloc_type(relobj, input_shndx, type, shndx,
+ address, addend, false, true));
}
// A reloc against the STT_SECTION symbol of an output section.
void
add_output_section(Output_section* os, unsigned int type, Output_data* od,
Address address, Addend addend)
- { this->add(Output_reloc_type(os, type, od, address, addend)); }
+ { this->add(os, Output_reloc_type(os, type, od, address, addend)); }
void
- add_output_section(Output_section* os, unsigned int type, Relobj* relobj,
+ add_output_section(Output_section* os, unsigned int type,
+ Sized_relobj<size, big_endian>* relobj,
unsigned int shndx, Address address, Addend addend)
- { this->add(Output_reloc_type(os, type, relobj, shndx, address, addend)); }
+ { this->add(os, Output_reloc_type(os, type, relobj, shndx, address,
+ addend)); }
+};
+
+// Output_relocatable_relocs represents a relocation section in a
+// relocatable link. The actual data is written out in the target
+// hook relocate_for_relocatable. This just saves space for it.
+
+template<int sh_type, int size, bool big_endian>
+class Output_relocatable_relocs : public Output_section_data
+{
+ public:
+ Output_relocatable_relocs(Relocatable_relocs* rr)
+ : Output_section_data(Output_data::default_alignment_for_size(size)),
+ rr_(rr)
+ { }
+
+ void
+ set_final_data_size();
+
+ // Write out the data. There is nothing to do here.
+ void
+ do_write(Output_file*)
+ { }
+
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _("** relocs")); }
+
+ private:
+ // The relocs associated with this input section.
+ Relocatable_relocs* rr_;
+};
+
+// Handle a GROUP section.
+
+template<int size, bool big_endian>
+class Output_data_group : public Output_section_data
+{
+ public:
+ // The constructor clears *INPUT_SHNDXES.
+ Output_data_group(Sized_relobj<size, big_endian>* relobj,
+ section_size_type entry_count,
+ elfcpp::Elf_Word flags,
+ std::vector<unsigned int>* input_shndxes);
+
+ void
+ do_write(Output_file*);
+
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _("** group")); }
+
+ private:
+ // The input object.
+ Sized_relobj<size, big_endian>* relobj_;
+ // The group flag word.
+ elfcpp::Elf_Word flags_;
+ // The section indexes of the input sections in this group.
+ std::vector<unsigned int> input_shndxes_;
};
// Output_data_got is used to manage a GOT. Each entry in the GOT is
// needed.
template<int size, bool big_endian>
-class Output_data_got : public Output_section_data
+class Output_data_got : public Output_section_data_build
{
public:
typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
+ typedef Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian> Rel_dyn;
+ typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn;
- Output_data_got(const General_options* options)
- : Output_section_data(Output_data::default_alignment(size)),
- options_(options), entries_()
+ Output_data_got()
+ : Output_section_data_build(Output_data::default_alignment_for_size(size)),
+ entries_()
{ }
// Add an entry for a global symbol to the GOT. Return true if this
// is a new GOT entry, false if the symbol was already in the GOT.
bool
- add_global(Symbol* gsym);
+ add_global(Symbol* gsym, unsigned int got_type);
- // Add an entry for a local symbol to the GOT. This returns the
- // offset of the new entry from the start of the GOT.
- unsigned int
- add_local(Object* object, unsigned int sym_index)
- {
- this->entries_.push_back(Got_entry(object, sym_index));
- this->set_got_size();
- return this->last_got_offset();
- }
+ // Add an entry for a global symbol to the GOT, and add a dynamic
+ // relocation of type R_TYPE for the GOT entry.
+ void
+ add_global_with_rel(Symbol* gsym, unsigned int got_type,
+ Rel_dyn* rel_dyn, unsigned int r_type);
+
+ void
+ add_global_with_rela(Symbol* gsym, unsigned int got_type,
+ Rela_dyn* rela_dyn, unsigned int r_type);
+
+ // Add a pair of entries for a global symbol to the GOT, and add
+ // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively.
+ void
+ add_global_pair_with_rel(Symbol* gsym, unsigned int got_type,
+ Rel_dyn* rel_dyn, unsigned int r_type_1,
+ unsigned int r_type_2);
+
+ void
+ add_global_pair_with_rela(Symbol* gsym, unsigned int got_type,
+ Rela_dyn* rela_dyn, unsigned int r_type_1,
+ unsigned int r_type_2);
+
+ // Add an entry for a local symbol to the GOT. This returns true if
+ // this is a new GOT entry, false if the symbol already has a GOT
+ // entry.
+ bool
+ add_local(Sized_relobj<size, big_endian>* object, unsigned int sym_index,
+ unsigned int got_type);
+
+ // Add an entry for a local symbol to the GOT, and add a dynamic
+ // relocation of type R_TYPE for the GOT entry.
+ void
+ add_local_with_rel(Sized_relobj<size, big_endian>* object,
+ unsigned int sym_index, unsigned int got_type,
+ Rel_dyn* rel_dyn, unsigned int r_type);
+
+ void
+ add_local_with_rela(Sized_relobj<size, big_endian>* object,
+ unsigned int sym_index, unsigned int got_type,
+ Rela_dyn* rela_dyn, unsigned int r_type);
+
+ // Add a pair of entries for a local symbol to the GOT, and add
+ // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively.
+ void
+ add_local_pair_with_rel(Sized_relobj<size, big_endian>* object,
+ unsigned int sym_index, unsigned int shndx,
+ unsigned int got_type, Rel_dyn* rel_dyn,
+ unsigned int r_type_1, unsigned int r_type_2);
+
+ void
+ add_local_pair_with_rela(Sized_relobj<size, big_endian>* object,
+ unsigned int sym_index, unsigned int shndx,
+ unsigned int got_type, Rela_dyn* rela_dyn,
+ unsigned int r_type_1, unsigned int r_type_2);
// Add a constant to the GOT. This returns the offset of the new
// entry from the start of the GOT.
return this->last_got_offset();
}
+ protected:
// Write out the GOT table.
void
do_write(Output_file*);
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _("** GOT")); }
+
private:
// This POD class holds a single GOT entry.
class Got_entry
{ this->u_.gsym = gsym; }
// Create a local symbol entry.
- Got_entry(Object* object, unsigned int local_sym_index)
+ Got_entry(Sized_relobj<size, big_endian>* object,
+ unsigned int local_sym_index)
: local_sym_index_(local_sym_index)
{
gold_assert(local_sym_index != GSYM_CODE
// Write the GOT entry to an output view.
void
- write(const General_options*, unsigned char* pov) const;
+ write(unsigned char* pov) const;
private:
enum
union
{
// For a local symbol, the object.
- Object* object;
+ Sized_relobj<size, big_endian>* object;
// For a global symbol, the symbol.
Symbol* gsym;
// For a constant, the constant.
// Set the size of the section.
void
set_got_size()
- { this->set_data_size(this->got_offset(this->entries_.size())); }
+ { this->set_current_data_size(this->got_offset(this->entries_.size())); }
- // Options.
- const General_options* options_;
// The list of GOT entries.
Got_entries entries_;
};
class Output_data_dynamic : public Output_section_data
{
public:
- Output_data_dynamic(const Target* target, Stringpool* pool)
- : Output_section_data(Output_data::default_alignment(target->get_size())),
- target_(target), entries_(), pool_(pool)
+ Output_data_dynamic(Stringpool* pool)
+ : Output_section_data(Output_data::default_alignment()),
+ entries_(), pool_(pool)
{ }
// Add a new dynamic entry with a fixed numeric value.
add_constant(elfcpp::DT tag, unsigned int val)
{ this->add_entry(Dynamic_entry(tag, val)); }
- // Add a new dynamic entry with the address of a section.
+ // Add a new dynamic entry with the address of output data.
void
- add_section_address(elfcpp::DT tag, Output_section* os)
- { this->add_entry(Dynamic_entry(tag, os, false)); }
+ add_section_address(elfcpp::DT tag, const Output_data* od)
+ { this->add_entry(Dynamic_entry(tag, od, false)); }
- // Add a new dynamic entry with the size of a section.
+ // Add a new dynamic entry with the address of output data
+ // plus a constant offset.
void
- add_section_size(elfcpp::DT tag, Output_section* os)
- { this->add_entry(Dynamic_entry(tag, os, true)); }
+ add_section_plus_offset(elfcpp::DT tag, const Output_data* od,
+ unsigned int offset)
+ { this->add_entry(Dynamic_entry(tag, od, offset)); }
+
+ // Add a new dynamic entry with the size of output data.
+ void
+ add_section_size(elfcpp::DT tag, const Output_data* od)
+ { this->add_entry(Dynamic_entry(tag, od, true)); }
// Add a new dynamic entry with the address of a symbol.
void
- add_symbol(elfcpp::DT tag, Symbol* sym)
+ add_symbol(elfcpp::DT tag, const Symbol* sym)
{ this->add_entry(Dynamic_entry(tag, sym)); }
// Add a new dynamic entry with a string.
void
add_string(elfcpp::DT tag, const char* str)
- { this->add_entry(Dynamic_entry(tag, this->pool_->add(str, NULL))); }
+ { this->add_entry(Dynamic_entry(tag, this->pool_->add(str, true, NULL))); }
+
+ void
+ add_string(elfcpp::DT tag, const std::string& str)
+ { this->add_string(tag, str.c_str()); }
+
+ protected:
+ // Adjust the output section to set the entry size.
+ void
+ do_adjust_output_section(Output_section*);
// Set the final data size.
void
- do_set_address(uint64_t, off_t);
+ set_final_data_size();
// Write out the dynamic entries.
void
do_write(Output_file*);
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _("** dynamic")); }
+
private:
// This POD class holds a single dynamic entry.
class Dynamic_entry
public:
// Create an entry with a fixed numeric value.
Dynamic_entry(elfcpp::DT tag, unsigned int val)
- : tag_(tag), classification_(DYNAMIC_NUMBER)
+ : tag_(tag), offset_(DYNAMIC_NUMBER)
{ this->u_.val = val; }
// Create an entry with the size or address of a section.
- Dynamic_entry(elfcpp::DT tag, Output_section* os, bool section_size)
+ Dynamic_entry(elfcpp::DT tag, const Output_data* od, bool section_size)
+ : tag_(tag),
+ offset_(section_size
+ ? DYNAMIC_SECTION_SIZE
+ : DYNAMIC_SECTION_ADDRESS)
+ { this->u_.od = od; }
+
+ // Create an entry with the address of a section plus a constant offset.
+ Dynamic_entry(elfcpp::DT tag, const Output_data* od, unsigned int offset)
: tag_(tag),
- classification_(section_size
- ? DYNAMIC_SECTION_SIZE
- : DYNAMIC_SECTION_ADDRESS)
- { this->u_.os = os; }
+ offset_(offset)
+ { this->u_.od = od; }
// Create an entry with the address of a symbol.
- Dynamic_entry(elfcpp::DT tag, Symbol* sym)
- : tag_(tag), classification_(DYNAMIC_SYMBOL)
+ Dynamic_entry(elfcpp::DT tag, const Symbol* sym)
+ : tag_(tag), offset_(DYNAMIC_SYMBOL)
{ this->u_.sym = sym; }
// Create an entry with a string.
Dynamic_entry(elfcpp::DT tag, const char* str)
- : tag_(tag), classification_(DYNAMIC_STRING)
+ : tag_(tag), offset_(DYNAMIC_STRING)
{ this->u_.str = str; }
// Write the dynamic entry to an output view.
template<int size, bool big_endian>
void
- write(unsigned char* pov, const Stringpool* ACCEPT_SIZE_ENDIAN) const;
+ write(unsigned char* pov, const Stringpool*) const;
private:
+ // Classification is encoded in the OFFSET field.
enum Classification
{
- // Number.
- DYNAMIC_NUMBER,
// Section address.
- DYNAMIC_SECTION_ADDRESS,
+ DYNAMIC_SECTION_ADDRESS = 0,
+ // Number.
+ DYNAMIC_NUMBER = -1U,
// Section size.
- DYNAMIC_SECTION_SIZE,
+ DYNAMIC_SECTION_SIZE = -2U,
// Symbol adress.
- DYNAMIC_SYMBOL,
+ DYNAMIC_SYMBOL = -3U,
// String.
- DYNAMIC_STRING
+ DYNAMIC_STRING = -4U
+ // Any other value indicates a section address plus OFFSET.
};
union
{
// For DYNAMIC_NUMBER.
unsigned int val;
- // For DYNAMIC_SECTION_ADDRESS and DYNAMIC_SECTION_SIZE.
- Output_section* os;
+ // For DYNAMIC_SECTION_SIZE and section address plus OFFSET.
+ const Output_data* od;
// For DYNAMIC_SYMBOL.
- Symbol* sym;
+ const Symbol* sym;
// For DYNAMIC_STRING.
const char* str;
} u_;
// The dynamic tag.
elfcpp::DT tag_;
- // The type of entry.
- Classification classification_;
+ // The type of entry (Classification) or offset within a section.
+ unsigned int offset_;
};
// Add an entry to the list.
// The type of the list of entries.
typedef std::vector<Dynamic_entry> Dynamic_entries;
- // The target.
- const Target* target_;
// The entries.
Dynamic_entries entries_;
// The pool used for strings.
Stringpool* pool_;
};
+// Output_symtab_xindex is used to handle SHT_SYMTAB_SHNDX sections,
+// which may be required if the object file has more than
+// SHN_LORESERVE sections.
+
+class Output_symtab_xindex : public Output_section_data
+{
+ public:
+ Output_symtab_xindex(size_t symcount)
+ : Output_section_data(symcount * 4, 4),
+ entries_()
+ { }
+
+ // Add an entry: symbol number SYMNDX has section SHNDX.
+ void
+ add(unsigned int symndx, unsigned int shndx)
+ { this->entries_.push_back(std::make_pair(symndx, shndx)); }
+
+ protected:
+ void
+ do_write(Output_file*);
+
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _("** symtab xindex")); }
+
+ private:
+ template<bool big_endian>
+ void
+ endian_do_write(unsigned char*);
+
+ // It is likely that most symbols will not require entries. Rather
+ // than keep a vector for all symbols, we keep pairs of symbol index
+ // and section index.
+ typedef std::vector<std::pair<unsigned int, unsigned int> > Xindex_entries;
+
+ // The entries we need.
+ Xindex_entries entries_;
+};
+
// An output section. We don't expect to have too many output
// sections, so we don't bother to do a template on the size.
{
public:
// Create an output section, giving the name, type, and flags.
- Output_section(const char* name, elfcpp::Elf_Word, elfcpp::Elf_Xword,
- bool may_add_data);
+ Output_section(const char* name, elfcpp::Elf_Word, elfcpp::Elf_Xword);
virtual ~Output_section();
// Add a new input section SHNDX, named NAME, with header SHDR, from
- // object OBJECT. Return the offset within the output section.
+ // object OBJECT. RELOC_SHNDX is the index of a relocation section
+ // which applies to this section, or 0 if none, or -1 if more than
+ // one. HAVE_SECTIONS_SCRIPT is true if we have a SECTIONS clause
+ // in a linker script; in that case we need to keep track of input
+ // sections associated with an output section. Return the offset
+ // within the output section.
template<int size, bool big_endian>
off_t
- add_input_section(Relobj* object, unsigned int shndx, const char *name,
- const elfcpp::Shdr<size, big_endian>& shdr);
+ add_input_section(Sized_relobj<size, big_endian>* object, unsigned int shndx,
+ const char *name,
+ const elfcpp::Shdr<size, big_endian>& shdr,
+ unsigned int reloc_shndx, bool have_sections_script);
- // Add generated data ODATA to this output section.
+ // Add generated data POSD to this output section.
void
add_output_section_data(Output_section_data* posd);
flags() const
{ return this->flags_; }
- // Return the section index in the output file.
- unsigned int
- do_out_shndx() const
- { return this->out_shndx_; }
-
- // Set the output section index.
+ // Update the output section flags based on input section flags.
void
- do_set_out_shndx(unsigned int shndx)
- { this->out_shndx_ = shndx; }
+ update_flags_for_input_section(elfcpp::Elf_Xword flags);
// Return the entsize field.
uint64_t
// Set the entsize field.
void
- set_entsize(uint64_t v)
- { this->entsize_ = v; }
+ set_entsize(uint64_t v);
- // Set the link field.
+ // Set the load address.
+ void
+ set_load_address(uint64_t load_address)
+ {
+ this->load_address_ = load_address;
+ this->has_load_address_ = true;
+ }
+
+ // Set the link field to the output section index of a section.
+ void
+ set_link_section(const Output_data* od)
+ {
+ gold_assert(this->link_ == 0
+ && !this->should_link_to_symtab_
+ && !this->should_link_to_dynsym_);
+ this->link_section_ = od;
+ }
+
+ // Set the link field to a constant.
void
set_link(unsigned int v)
- { this->link_ = v; }
+ {
+ gold_assert(this->link_section_ == NULL
+ && !this->should_link_to_symtab_
+ && !this->should_link_to_dynsym_);
+ this->link_ = v;
+ }
+
+ // Record that this section should link to the normal symbol table.
+ void
+ set_should_link_to_symtab()
+ {
+ gold_assert(this->link_section_ == NULL
+ && this->link_ == 0
+ && !this->should_link_to_dynsym_);
+ this->should_link_to_symtab_ = true;
+ }
+
+ // Record that this section should link to the dynamic symbol table.
+ void
+ set_should_link_to_dynsym()
+ {
+ gold_assert(this->link_section_ == NULL
+ && this->link_ == 0
+ && !this->should_link_to_symtab_);
+ this->should_link_to_dynsym_ = true;
+ }
+
+ // Return the info field.
+ unsigned int
+ info() const
+ {
+ gold_assert(this->info_section_ == NULL
+ && this->info_symndx_ == NULL);
+ return this->info_;
+ }
+
+ // Set the info field to the output section index of a section.
+ void
+ set_info_section(const Output_section* os)
+ {
+ gold_assert((this->info_section_ == NULL
+ || (this->info_section_ == os
+ && this->info_uses_section_index_))
+ && this->info_symndx_ == NULL
+ && this->info_ == 0);
+ this->info_section_ = os;
+ this->info_uses_section_index_= true;
+ }
+
+ // Set the info field to the symbol table index of a symbol.
+ void
+ set_info_symndx(const Symbol* sym)
+ {
+ gold_assert(this->info_section_ == NULL
+ && (this->info_symndx_ == NULL
+ || this->info_symndx_ == sym)
+ && this->info_ == 0);
+ this->info_symndx_ = sym;
+ }
+
+ // Set the info field to the symbol table index of a section symbol.
+ void
+ set_info_section_symndx(const Output_section* os)
+ {
+ gold_assert((this->info_section_ == NULL
+ || (this->info_section_ == os
+ && !this->info_uses_section_index_))
+ && this->info_symndx_ == NULL
+ && this->info_ == 0);
+ this->info_section_ = os;
+ this->info_uses_section_index_ = false;
+ }
- // Set the info field.
+ // Set the info field to a constant.
void
set_info(unsigned int v)
- { this->info_ = v; }
+ {
+ gold_assert(this->info_section_ == NULL
+ && this->info_symndx_ == NULL
+ && (this->info_ == 0
+ || this->info_ == v));
+ this->info_ = v;
+ }
// Set the addralign field.
void
set_addralign(uint64_t v)
{ this->addralign_ = v; }
+ // Whether the output section index has been set.
+ bool
+ has_out_shndx() const
+ { return this->out_shndx_ != -1U; }
+
// Indicate that we need a symtab index.
void
set_needs_symtab_index()
this->dynsym_index_ = index;
}
- // Set the address of the Output_section. For a typical
+ // Return whether the input sections sections attachd to this output
+ // section may require sorting. This is used to handle constructor
+ // priorities compatibly with GNU ld.
+ bool
+ may_sort_attached_input_sections() const
+ { return this->may_sort_attached_input_sections_; }
+
+ // Record that the input sections attached to this output section
+ // may require sorting.
+ void
+ set_may_sort_attached_input_sections()
+ { this->may_sort_attached_input_sections_ = true; }
+
+ // Return whether the input sections attached to this output section
+ // require sorting. This is used to handle constructor priorities
+ // compatibly with GNU ld.
+ bool
+ must_sort_attached_input_sections() const
+ { return this->must_sort_attached_input_sections_; }
+
+ // Record that the input sections attached to this output section
+ // require sorting.
+ void
+ set_must_sort_attached_input_sections()
+ { this->must_sort_attached_input_sections_ = true; }
+
+ // Return whether this section holds relro data--data which has
+ // dynamic relocations but which may be marked read-only after the
+ // dynamic relocations have been completed.
+ bool
+ is_relro() const
+ { return this->is_relro_; }
+
+ // Record that this section holds relro data.
+ void
+ set_is_relro()
+ { this->is_relro_ = true; }
+
+ // Record that this section does not hold relro data.
+ void
+ clear_is_relro()
+ { this->is_relro_ = false; }
+
+ // True if this section holds relro local data--relro data for which
+ // the dynamic relocations are all RELATIVE relocations.
+ bool
+ is_relro_local() const
+ { return this->is_relro_local_; }
+
+ // Record that this section holds relro local data.
+ void
+ set_is_relro_local()
+ { this->is_relro_local_ = true; }
+
+ // True if this is a small section: a section which holds small
+ // variables.
+ bool
+ is_small_section() const
+ { return this->is_small_section_; }
+
+ // Record that this is a small section.
+ void
+ set_is_small_section()
+ { this->is_small_section_ = true; }
+
+ // True if this is a large section: a section which holds large
+ // variables.
+ bool
+ is_large_section() const
+ { return this->is_large_section_; }
+
+ // Record that this is a large section.
+ void
+ set_is_large_section()
+ { this->is_large_section_ = true; }
+
+ // True if this is a large data (not BSS) section.
+ bool
+ is_large_data_section()
+ { return this->is_large_section_ && this->type_ != elfcpp::SHT_NOBITS; }
+
+ // Return whether this section should be written after all the input
+ // sections are complete.
+ bool
+ after_input_sections() const
+ { return this->after_input_sections_; }
+
+ // Record that this section should be written after all the input
+ // sections are complete.
+ void
+ set_after_input_sections()
+ { this->after_input_sections_ = true; }
+
+ // Return whether this section requires postprocessing after all
+ // relocations have been applied.
+ bool
+ requires_postprocessing() const
+ { return this->requires_postprocessing_; }
+
+ // If a section requires postprocessing, return the buffer to use.
+ unsigned char*
+ postprocessing_buffer() const
+ {
+ gold_assert(this->postprocessing_buffer_ != NULL);
+ return this->postprocessing_buffer_;
+ }
+
+ // If a section requires postprocessing, create the buffer to use.
+ void
+ create_postprocessing_buffer();
+
+ // If a section requires postprocessing, this is the size of the
+ // buffer to which relocations should be applied.
+ off_t
+ postprocessing_buffer_size() const
+ { return this->current_data_size_for_child(); }
+
+ // Modify the section name. This is only permitted for an
+ // unallocated section, and only before the size has been finalized.
+ // Otherwise the name will not get into Layout::namepool_.
+ void
+ set_name(const char* newname)
+ {
+ gold_assert((this->flags_ & elfcpp::SHF_ALLOC) == 0);
+ gold_assert(!this->is_data_size_valid());
+ this->name_ = newname;
+ }
+
+ // Return whether the offset OFFSET in the input section SHNDX in
+ // object OBJECT is being included in the link.
+ bool
+ is_input_address_mapped(const Relobj* object, unsigned int shndx,
+ off_t offset) const;
+
+ // Return the offset within the output section of OFFSET relative to
+ // the start of input section SHNDX in object OBJECT.
+ section_offset_type
+ output_offset(const Relobj* object, unsigned int shndx,
+ section_offset_type offset) const;
+
+ // Return the output virtual address of OFFSET relative to the start
+ // of input section SHNDX in object OBJECT.
+ uint64_t
+ output_address(const Relobj* object, unsigned int shndx,
+ off_t offset) const;
+
+ // Look for the merged section for input section SHNDX in object
+ // OBJECT. If found, return true, and set *ADDR to the address of
+ // the start of the merged section. This is not necessary the
+ // output offset corresponding to input offset 0 in the section,
+ // since the section may be mapped arbitrarily.
+ bool
+ find_starting_output_address(const Relobj* object, unsigned int shndx,
+ uint64_t* addr) const;
+
+ // Record that this output section was found in the SECTIONS clause
+ // of a linker script.
+ void
+ set_found_in_sections_clause()
+ { this->found_in_sections_clause_ = true; }
+
+ // Return whether this output section was found in the SECTIONS
+ // clause of a linker script.
+ bool
+ found_in_sections_clause() const
+ { return this->found_in_sections_clause_; }
+
+ // Write the section header into *OPHDR.
+ template<int size, bool big_endian>
+ void
+ write_header(const Layout*, const Stringpool*,
+ elfcpp::Shdr_write<size, big_endian>*) const;
+
+ // The next few calls are for linker script support.
+
+ // Store the list of input sections for this Output_section into the
+ // list passed in. This removes the input sections, leaving only
+ // any Output_section_data elements. This returns the size of those
+ // Output_section_data elements. ADDRESS is the address of this
+ // output section. FILL is the fill value to use, in case there are
+ // any spaces between the remaining Output_section_data elements.
+ uint64_t
+ get_input_sections(uint64_t address, const std::string& fill,
+ std::list<std::pair<Relobj*, unsigned int > >*);
+
+ // Add an input section from a script.
+ void
+ add_input_section_for_script(Relobj* object, unsigned int shndx,
+ off_t data_size, uint64_t addralign);
+
+ // Set the current size of the output section.
+ void
+ set_current_data_size(off_t size)
+ { this->set_current_data_size_for_child(size); }
+
+ // Get the current size of the output section.
+ off_t
+ current_data_size() const
+ { return this->current_data_size_for_child(); }
+
+ // End of linker script support.
+
+ // Print merge statistics to stderr.
+ void
+ print_merge_stats();
+
+ protected:
+ // Return the output section--i.e., the object itself.
+ Output_section*
+ do_output_section()
+ { return this; }
+
+ // Return the section index in the output file.
+ unsigned int
+ do_out_shndx() const
+ {
+ gold_assert(this->out_shndx_ != -1U);
+ return this->out_shndx_;
+ }
+
+ // Set the output section index.
+ void
+ do_set_out_shndx(unsigned int shndx)
+ {
+ gold_assert(this->out_shndx_ == -1U || this->out_shndx_ == shndx);
+ this->out_shndx_ = shndx;
+ }
+
+ // Set the final data size of the Output_section. For a typical
// Output_section, there is nothing to do, but if there are any
- // Output_section_data objects we need to set the final addresses
+ // Output_section_data objects we need to set their final addresses
// here.
+ virtual void
+ set_final_data_size();
+
+ // Reset the address and file offset.
void
- do_set_address(uint64_t, off_t);
+ do_reset_address_and_file_offset();
// Write the data to the file. For a typical Output_section, this
// does nothing: the data is written out by calling Object::Relocate
// on each input object. But if there are any Output_section_data
// objects we do need to write them out here.
- void
+ virtual void
do_write(Output_file*);
// Return the address alignment--function required by parent class.
do_addralign() const
{ return this->addralign_; }
+ // Return whether there is a load address.
+ bool
+ do_has_load_address() const
+ { return this->has_load_address_; }
+
+ // Return the load address.
+ uint64_t
+ do_load_address() const
+ {
+ gold_assert(this->has_load_address_);
+ return this->load_address_;
+ }
+
// Return whether this is an Output_section.
bool
do_is_section() const
do_is_section_flag_set(elfcpp::Elf_Xword flag) const
{ return (this->flags_ & flag) != 0; }
- // Write the section header into *OPHDR.
- template<int size, bool big_endian>
+ // Set the TLS offset. Called only for SHT_TLS sections.
+ void
+ do_set_tls_offset(uint64_t tls_base);
+
+ // Return the TLS offset, relative to the base of the TLS segment.
+ // Valid only for SHT_TLS sections.
+ uint64_t
+ do_tls_offset() const
+ { return this->tls_offset_; }
+
+ // This may be implemented by a child class.
+ virtual void
+ do_finalize_name(Layout*)
+ { }
+
+ // Print to the map file.
+ virtual void
+ do_print_to_mapfile(Mapfile*) const;
+
+ // Record that this section requires postprocessing after all
+ // relocations have been applied. This is called by a child class.
void
- write_header(const Stringpool*, elfcpp::Shdr_write<size, big_endian>*) const;
+ set_requires_postprocessing()
+ {
+ this->requires_postprocessing_ = true;
+ this->after_input_sections_ = true;
+ }
+
+ // Write all the data of an Output_section into the postprocessing
+ // buffer.
+ void
+ write_to_postprocessing_buffer();
private:
// In some cases we need to keep a list of the input sections
{
public:
Input_section()
- : shndx_(0), p2align_(0), data_size_(0)
- { this->u_.object = NULL; }
+ : shndx_(0), p2align_(0)
+ {
+ this->u1_.data_size = 0;
+ this->u2_.object = NULL;
+ }
+ // For an ordinary input section.
Input_section(Relobj* object, unsigned int shndx, off_t data_size,
uint64_t addralign)
: shndx_(shndx),
- p2align_(ffsll(static_cast<long long>(addralign))),
- data_size_(data_size)
+ p2align_(ffsll(static_cast<long long>(addralign)))
{
- gold_assert(shndx != -1U);
- this->u_.object = object;
+ gold_assert(shndx != OUTPUT_SECTION_CODE
+ && shndx != MERGE_DATA_SECTION_CODE
+ && shndx != MERGE_STRING_SECTION_CODE);
+ this->u1_.data_size = data_size;
+ this->u2_.object = object;
}
+ // For a non-merge output section.
Input_section(Output_section_data* posd)
- : shndx_(-1U),
- p2align_(ffsll(static_cast<long long>(posd->addralign()))),
- data_size_(0)
- { this->u_.posd = posd; }
+ : shndx_(OUTPUT_SECTION_CODE), p2align_(0)
+ {
+ this->u1_.data_size = 0;
+ this->u2_.posd = posd;
+ }
+
+ // For a merge section.
+ Input_section(Output_section_data* posd, bool is_string, uint64_t entsize)
+ : shndx_(is_string
+ ? MERGE_STRING_SECTION_CODE
+ : MERGE_DATA_SECTION_CODE),
+ p2align_(0)
+ {
+ this->u1_.entsize = entsize;
+ this->u2_.posd = posd;
+ }
// The required alignment.
uint64_t
addralign() const
{
+ if (!this->is_input_section())
+ return this->u2_.posd->addralign();
return (this->p2align_ == 0
? 0
: static_cast<uint64_t>(1) << (this->p2align_ - 1));
off_t
data_size() const;
+ // Whether this is an input section.
+ bool
+ is_input_section() const
+ {
+ return (this->shndx_ != OUTPUT_SECTION_CODE
+ && this->shndx_ != MERGE_DATA_SECTION_CODE
+ && this->shndx_ != MERGE_STRING_SECTION_CODE);
+ }
+
+ // Return whether this is a merge section which matches the
+ // parameters.
+ bool
+ is_merge_section(bool is_string, uint64_t entsize,
+ uint64_t addralign) const
+ {
+ return (this->shndx_ == (is_string
+ ? MERGE_STRING_SECTION_CODE
+ : MERGE_DATA_SECTION_CODE)
+ && this->u1_.entsize == entsize
+ && this->addralign() == addralign);
+ }
+
+ // Return the object for an input section.
+ Relobj*
+ relobj() const
+ {
+ gold_assert(this->is_input_section());
+ return this->u2_.object;
+ }
+
+ // Return the input section index for an input section.
+ unsigned int
+ shndx() const
+ {
+ gold_assert(this->is_input_section());
+ return this->shndx_;
+ }
+
+ // Set the output section.
+ void
+ set_output_section(Output_section* os)
+ {
+ gold_assert(!this->is_input_section());
+ this->u2_.posd->set_output_section(os);
+ }
+
// Set the address and file offset. This is called during
- // Layout::finalize. SECOFF is the file offset of the enclosing
- // section.
+ // Layout::finalize. SECTION_FILE_OFFSET is the file offset of
+ // the enclosing section.
+ void
+ set_address_and_file_offset(uint64_t address, off_t file_offset,
+ off_t section_file_offset);
+
+ // Reset the address and file offset.
void
- set_address(uint64_t addr, off_t off, off_t secoff);
+ reset_address_and_file_offset();
+
+ // Finalize the data size.
+ void
+ finalize_data_size();
+
+ // Add an input section, for SHF_MERGE sections.
+ bool
+ add_input_section(Relobj* object, unsigned int shndx)
+ {
+ gold_assert(this->shndx_ == MERGE_DATA_SECTION_CODE
+ || this->shndx_ == MERGE_STRING_SECTION_CODE);
+ return this->u2_.posd->add_input_section(object, shndx);
+ }
+
+ // Given an input OBJECT, an input section index SHNDX within that
+ // object, and an OFFSET relative to the start of that input
+ // section, return whether or not the output offset is known. If
+ // this function returns true, it sets *POUTPUT to the offset in
+ // the output section, relative to the start of the input section
+ // in the output section. *POUTPUT may be different from OFFSET
+ // for a merged section.
+ bool
+ output_offset(const Relobj* object, unsigned int shndx,
+ section_offset_type offset,
+ section_offset_type *poutput) const;
+
+ // Return whether this is the merge section for the input section
+ // SHNDX in OBJECT.
+ bool
+ is_merge_section_for(const Relobj* object, unsigned int shndx) const;
// Write out the data. This does nothing for an input section.
void
write(Output_file*);
+ // Write the data to a buffer. This does nothing for an input
+ // section.
+ void
+ write_to_buffer(unsigned char*);
+
+ // Print to a map file.
+ void
+ print_to_mapfile(Mapfile*) const;
+
+ // Print statistics about merge sections to stderr.
+ void
+ print_merge_stats(const char* section_name)
+ {
+ if (this->shndx_ == MERGE_DATA_SECTION_CODE
+ || this->shndx_ == MERGE_STRING_SECTION_CODE)
+ this->u2_.posd->print_merge_stats(section_name);
+ }
+
private:
- // Whether this is an input section.
- bool
- is_input_section() const
- { return this->shndx_ != -1U; }
+ // Code values which appear in shndx_. If the value is not one of
+ // these codes, it is the input section index in the object file.
+ enum
+ {
+ // An Output_section_data.
+ OUTPUT_SECTION_CODE = -1U,
+ // An Output_section_data for an SHF_MERGE section with
+ // SHF_STRINGS not set.
+ MERGE_DATA_SECTION_CODE = -2U,
+ // An Output_section_data for an SHF_MERGE section with
+ // SHF_STRINGS set.
+ MERGE_STRING_SECTION_CODE = -3U
+ };
- // For an ordinary input section, this is the section index in
- // the input file. For an Output_section_data, this is -1U.
+ // For an ordinary input section, this is the section index in the
+ // input file. For an Output_section_data, this is
+ // OUTPUT_SECTION_CODE or MERGE_DATA_SECTION_CODE or
+ // MERGE_STRING_SECTION_CODE.
unsigned int shndx_;
// The required alignment, stored as a power of 2.
unsigned int p2align_;
- // For an ordinary input section, the section size.
- off_t data_size_;
union
{
- // If shndx_ != -1U, this points to the object which holds the
+ // For an ordinary input section, the section size.
+ off_t data_size;
+ // For OUTPUT_SECTION_CODE, this is not used. For
+ // MERGE_DATA_SECTION_CODE or MERGE_STRING_SECTION_CODE, the
+ // entity size.
+ uint64_t entsize;
+ } u1_;
+ union
+ {
+ // For an ordinary input section, the object which holds the
// input section.
Relobj* object;
- // If shndx_ == -1U, this is the data to write out.
+ // For OUTPUT_SECTION_CODE or MERGE_DATA_SECTION_CODE or
+ // MERGE_STRING_SECTION_CODE, the data.
Output_section_data* posd;
- } u_;
+ } u2_;
};
typedef std::vector<Input_section> Input_section_list;
+ // This class is used to sort the input sections.
+ class Input_section_sort_entry;
+
+ // This is the sort comparison function.
+ struct Input_section_sort_compare
+ {
+ bool
+ operator()(const Input_section_sort_entry&,
+ const Input_section_sort_entry&) const;
+ };
+
+ // Fill data. This is used to fill in data between input sections.
+ // It is also used for data statements (BYTE, WORD, etc.) in linker
+ // scripts. When we have to keep track of the input sections, we
+ // can use an Output_data_const, but we don't want to have to keep
+ // track of input sections just to implement fills.
+ class Fill
+ {
+ public:
+ Fill(off_t section_offset, off_t length)
+ : section_offset_(section_offset),
+ length_(convert_to_section_size_type(length))
+ { }
+
+ // Return section offset.
+ off_t
+ section_offset() const
+ { return this->section_offset_; }
+
+ // Return fill length.
+ section_size_type
+ length() const
+ { return this->length_; }
+
+ private:
+ // The offset within the output section.
+ off_t section_offset_;
+ // The length of the space to fill.
+ section_size_type length_;
+ };
+
+ typedef std::vector<Fill> Fill_list;
+
+ // Add a new output section by Input_section.
+ void
+ add_output_section_data(Input_section*);
+
+ // Add an SHF_MERGE input section. Returns true if the section was
+ // handled.
+ bool
+ add_merge_input_section(Relobj* object, unsigned int shndx, uint64_t flags,
+ uint64_t entsize, uint64_t addralign);
+
+ // Add an output SHF_MERGE section POSD to this output section.
+ // IS_STRING indicates whether it is a SHF_STRINGS section, and
+ // ENTSIZE is the entity size. This returns the entry added to
+ // input_sections_.
+ void
+ add_output_merge_section(Output_section_data* posd, bool is_string,
+ uint64_t entsize);
+
+ // Sort the attached input sections.
+ void
+ sort_attached_input_sections();
+
// Most of these fields are only valid after layout.
// The name of the section. This will point into a Stringpool.
uint64_t addralign_;
// The section entry size.
uint64_t entsize_;
+ // The load address. This is only used when using a linker script
+ // with a SECTIONS clause. The has_load_address_ field indicates
+ // whether this field is valid.
+ uint64_t load_address_;
// The file offset is in the parent class.
- // The section link field.
+ // Set the section link field to the index of this section.
+ const Output_data* link_section_;
+ // If link_section_ is NULL, this is the link field.
unsigned int link_;
- // The section info field.
+ // Set the section info field to the index of this section.
+ const Output_section* info_section_;
+ // If info_section_ is NULL, set the info field to the symbol table
+ // index of this symbol.
+ const Symbol* info_symndx_;
+ // If info_section_ and info_symndx_ are NULL, this is the section
+ // info field.
unsigned int info_;
// The section type.
- elfcpp::Elf_Word type_;
+ const elfcpp::Elf_Word type_;
// The section flags.
elfcpp::Elf_Xword flags_;
// The section index.
Input_section_list input_sections_;
// The offset of the first entry in input_sections_.
off_t first_input_offset_;
- // Whether we permit adding data.
- bool may_add_data_ : 1;
+ // The fill data. This is separate from input_sections_ because we
+ // often will need fill sections without needing to keep track of
+ // input sections.
+ Fill_list fills_;
+ // If the section requires postprocessing, this buffer holds the
+ // section contents during relocation.
+ unsigned char* postprocessing_buffer_;
// Whether this output section needs a STT_SECTION symbol in the
// normal symbol table. This will be true if there is a relocation
// which needs it.
// dynamic symbol table. This will be true if there is a dynamic
// relocation which needs it.
bool needs_dynsym_index_ : 1;
+ // Whether the link field of this output section should point to the
+ // normal symbol table.
+ bool should_link_to_symtab_ : 1;
+ // Whether the link field of this output section should point to the
+ // dynamic symbol table.
+ bool should_link_to_dynsym_ : 1;
+ // Whether this section should be written after all the input
+ // sections are complete.
+ bool after_input_sections_ : 1;
+ // Whether this section requires post processing after all
+ // relocations have been applied.
+ bool requires_postprocessing_ : 1;
+ // Whether an input section was mapped to this output section
+ // because of a SECTIONS clause in a linker script.
+ bool found_in_sections_clause_ : 1;
+ // Whether this section has an explicitly specified load address.
+ bool has_load_address_ : 1;
+ // True if the info_section_ field means the section index of the
+ // section, false if it means the symbol index of the corresponding
+ // section symbol.
+ bool info_uses_section_index_ : 1;
+ // True if the input sections attached to this output section may
+ // need sorting.
+ bool may_sort_attached_input_sections_ : 1;
+ // True if the input sections attached to this output section must
+ // be sorted.
+ bool must_sort_attached_input_sections_ : 1;
+ // True if the input sections attached to this output section have
+ // already been sorted.
+ bool attached_input_sections_are_sorted_ : 1;
+ // True if this section holds relro data.
+ bool is_relro_ : 1;
+ // True if this section holds relro local data.
+ bool is_relro_local_ : 1;
+ // True if this is a small section.
+ bool is_small_section_ : 1;
+ // True if this is a large section.
+ bool is_large_section_ : 1;
+ // For SHT_TLS sections, the offset of this section relative to the base
+ // of the TLS segment.
+ uint64_t tls_offset_;
};
// An output segment. PT_LOAD segments are built from collections of
filesz() const
{ return this->filesz_; }
+ // Return the file offset.
+ off_t
+ offset() const
+ { return this->offset_; }
+
+ // Whether this is a segment created to hold large data sections.
+ bool
+ is_large_data_segment() const
+ { return this->is_large_data_segment_; }
+
+ // Record that this is a segment created to hold large data
+ // sections.
+ void
+ set_is_large_data_segment()
+ { this->is_large_data_segment_ = true; }
+
// Return the maximum alignment of the Output_data.
uint64_t
- addralign();
+ maximum_alignment();
// Add an Output_section to this segment.
void
- add_output_section(Output_section* os, elfcpp::Elf_Word seg_flags)
- { this->add_output_section(os, seg_flags, false); }
+ add_output_section(Output_section* os, elfcpp::Elf_Word seg_flags);
- // Add an Output_section to the start of this segment.
+ // Remove an Output_section from this segment. It is an error if it
+ // is not present.
void
- add_initial_output_section(Output_section* os, elfcpp::Elf_Word seg_flags)
- { this->add_output_section(os, seg_flags, true); }
+ remove_output_section(Output_section* os);
// Add an Output_data (which is not an Output_section) to the start
// of this segment.
void
add_initial_output_data(Output_data*);
+ // Return true if this segment has any sections which hold actual
+ // data, rather than being a BSS section.
+ bool
+ has_any_data_sections() const
+ { return !this->output_data_.empty(); }
+
+ // Return the number of dynamic relocations applied to this segment.
+ unsigned int
+ dynamic_reloc_count() const;
+
+ // Return the address of the first section.
+ uint64_t
+ first_section_load_address() const;
+
+ // Return whether the addresses have been set already.
+ bool
+ are_addresses_set() const
+ { return this->are_addresses_set_; }
+
+ // Set the addresses.
+ void
+ set_addresses(uint64_t vaddr, uint64_t paddr)
+ {
+ this->vaddr_ = vaddr;
+ this->paddr_ = paddr;
+ this->are_addresses_set_ = true;
+ }
+
+ // Set the segment flags. This is only used if we have a PHDRS
+ // clause which explicitly specifies the flags.
+ void
+ set_flags(elfcpp::Elf_Word flags)
+ { this->flags_ = flags; }
+
// Set the address of the segment to ADDR and the offset to *POFF
- // (aligned if necessary), and set the addresses and offsets of all
- // contained output sections accordingly. Set the section indexes
- // of all contained output sections starting with *PSHNDX. Return
- // the address of the immediately following segment. Update *POFF
- // and *PSHNDX. This should only be called for a PT_LOAD segment.
+ // and set the addresses and offsets of all contained output
+ // sections accordingly. Set the section indexes of all contained
+ // output sections starting with *PSHNDX. If RESET is true, first
+ // reset the addresses of the contained sections. Return the
+ // address of the immediately following segment. Update *POFF and
+ // *PSHNDX. This should only be called for a PT_LOAD segment.
uint64_t
- set_section_addresses(uint64_t addr, off_t* poff, unsigned int* pshndx);
+ set_section_addresses(const Layout*, bool reset, uint64_t addr, off_t* poff,
+ unsigned int* pshndx);
+
+ // Set the minimum alignment of this segment. This may be adjusted
+ // upward based on the section alignments.
+ void
+ set_minimum_p_align(uint64_t align)
+ { this->min_p_align_ = align; }
// Set the offset of this segment based on the section. This should
// only be called for a non-PT_LOAD segment.
void
set_offset();
+ // Set the TLS offsets of the sections contained in the PT_TLS segment.
+ void
+ set_tls_offsets();
+
// Return the number of output sections.
unsigned int
output_section_count() const;
+ // Return the section attached to the list segment with the lowest
+ // load address. This is used when handling a PHDRS clause in a
+ // linker script.
+ Output_section*
+ section_with_lowest_load_address() const;
+
// Write the segment header into *OPHDR.
template<int size, bool big_endian>
void
// Write the section headers of associated sections into V.
template<int size, bool big_endian>
unsigned char*
- write_section_headers(const Stringpool*,
- unsigned char* v,
- unsigned int* pshndx ACCEPT_SIZE_ENDIAN) const;
+ write_section_headers(const Layout*, const Stringpool*, unsigned char* v,
+ unsigned int* pshndx) const;
+
+ // Print the output sections in the map file.
+ void
+ print_sections_to_mapfile(Mapfile*) const;
private:
Output_segment(const Output_segment&);
typedef std::list<Output_data*> Output_data_list;
- // Add an Output_section to this segment, specifying front or back.
- void
- add_output_section(Output_section*, elfcpp::Elf_Word seg_flags,
- bool front);
-
// Find the maximum alignment in an Output_data_list.
static uint64_t
- maximum_alignment(const Output_data_list*);
+ maximum_alignment_list(const Output_data_list*);
+
+ // Return whether the first data section is a relro section.
+ bool
+ is_first_section_relro() const;
// Set the section addresses in an Output_data_list.
uint64_t
- set_section_list_addresses(Output_data_list*, uint64_t addr, off_t* poff,
- unsigned int* pshndx);
+ set_section_list_addresses(const Layout*, bool reset, Output_data_list*,
+ uint64_t addr, off_t* poff, unsigned int* pshndx,
+ bool* in_tls, bool* in_relro);
// Return the number of Output_sections in an Output_data_list.
unsigned int
output_section_count_list(const Output_data_list*) const;
+ // Return the number of dynamic relocs in an Output_data_list.
+ unsigned int
+ dynamic_reloc_count_list(const Output_data_list*) const;
+
+ // Find the section with the lowest load address in an
+ // Output_data_list.
+ void
+ lowest_load_address_in_list(const Output_data_list* pdl,
+ Output_section** found,
+ uint64_t* found_lma) const;
+
// Write the section headers in the list into V.
template<int size, bool big_endian>
unsigned char*
- write_section_headers_list(const Stringpool*, const Output_data_list*,
- unsigned char* v,
- unsigned int* pshdx ACCEPT_SIZE_ENDIAN) const;
+ write_section_headers_list(const Layout*, const Stringpool*,
+ const Output_data_list*, unsigned char* v,
+ unsigned int* pshdx) const;
+
+ // Print a section list to the mapfile.
+ void
+ print_section_list_to_mapfile(Mapfile*, const Output_data_list*) const;
// The list of output data with contents attached to this segment.
Output_data_list output_data_;
uint64_t paddr_;
// The size of the segment in memory.
uint64_t memsz_;
- // The segment alignment.
- uint64_t align_;
+ // The maximum section alignment. The is_max_align_known_ field
+ // indicates whether this has been finalized.
+ uint64_t max_align_;
+ // The required minimum value for the p_align field. This is used
+ // for PT_LOAD segments. Note that this does not mean that
+ // addresses should be aligned to this value; it means the p_paddr
+ // and p_vaddr fields must be congruent modulo this value. For
+ // non-PT_LOAD segments, the dynamic linker works more efficiently
+ // if the p_align field has the more conventional value, although it
+ // can align as needed.
+ uint64_t min_p_align_;
// The offset of the segment data within the file.
off_t offset_;
// The size of the segment data in the file.
elfcpp::Elf_Word type_;
// The segment flags.
elfcpp::Elf_Word flags_;
- // Whether we have set align_.
- bool is_align_known_;
+ // Whether we have finalized max_align_.
+ bool is_max_align_known_ : 1;
+ // Whether vaddr and paddr were set by a linker script.
+ bool are_addresses_set_ : 1;
+ // Whether this segment holds large data sections.
+ bool is_large_data_segment_ : 1;
};
// This class represents the output file.
class Output_file
{
public:
- Output_file(const General_options& options);
+ Output_file(const char* name);
+
+ // Indicate that this is a temporary file which should not be
+ // output.
+ void
+ set_is_temporary()
+ { this->is_temporary_ = true; }
// Open the output file. FILE_SIZE is the final size of the file.
void
open(off_t file_size);
- // Close the output file and make sure there are no error.
+ // Resize the output file.
+ void
+ resize(off_t file_size);
+
+ // Close the output file (flushing all buffered data) and make sure
+ // there are no errors.
void
close();
// Write data to the output file.
void
- write(off_t offset, const void* data, off_t len)
+ write(off_t offset, const void* data, size_t len)
{ memcpy(this->base_ + offset, data, len); }
// Get a buffer to use to write to the file, given the offset into
// the file and the size.
unsigned char*
- get_output_view(off_t start, off_t size)
+ get_output_view(off_t start, size_t size)
{
- gold_assert(start >= 0 && size >= 0 && start + size <= this->file_size_);
+ gold_assert(start >= 0
+ && start + static_cast<off_t>(size) <= this->file_size_);
return this->base_ + start;
}
// VIEW must have been returned by get_output_view. Write the
// buffer to the file, passing in the offset and the size.
void
- write_output_view(off_t, off_t, unsigned char*)
+ write_output_view(off_t, size_t, unsigned char*)
+ { }
+
+ // Get a read/write buffer. This is used when we want to write part
+ // of the file, read it in, and write it again.
+ unsigned char*
+ get_input_output_view(off_t start, size_t size)
+ { return this->get_output_view(start, size); }
+
+ // Write a read/write buffer back to the file.
+ void
+ write_input_output_view(off_t, size_t, unsigned char*)
+ { }
+
+ // Get a read buffer. This is used when we just want to read part
+ // of the file back it in.
+ const unsigned char*
+ get_input_view(off_t start, size_t size)
+ { return this->get_output_view(start, size); }
+
+ // Release a read bfufer.
+ void
+ free_input_view(off_t, size_t, const unsigned char*)
{ }
private:
- // General options.
- const General_options& options_;
+ // Map the file into memory.
+ void
+ map();
+
+ // Allocate anonymous memory for the file.
+ void*
+ map_anonymous();
+
+ // Unmap the file from memory (and flush to disk buffers).
+ void
+ unmap();
+
// File name.
const char* name_;
// File descriptor.
off_t file_size_;
// Base of file mapped into memory.
unsigned char* base_;
+ // True iff base_ points to a memory buffer rather than an output file.
+ bool map_is_anonymous_;
+ // True if this is a temporary file which should not be output.
+ bool is_temporary_;
};
} // End namespace gold.
projects / binutils.git / blobdiff