// output.h -- manage the output file for gold -*- C++ -*-
+// Copyright 2006, 2007 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
#ifndef GOLD_OUTPUT_H
#define GOLD_OUTPUT_H
-#include <cassert>
#include <list>
+#include <vector>
#include "elfcpp.h"
#include "layout.h"
+#include "reloc-types.h"
+#include "parameters.h"
namespace gold
{
class General_options;
class Object;
+class Symbol;
class Output_file;
-
+class Output_section;
+class Target;
template<int size, bool big_endian>
class Sized_target;
+template<int size, bool big_endian>
+class Sized_relobj;
// An abtract class for data which has to go into the output file.
virtual
~Output_data();
- // Return the address.
+ // Return the address. This is only valid after Layout::finalize is
+ // finished.
uint64_t
address() const
{ return this->address_; }
- // Return the size of the data.
+ // Return the size of the data. 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_; }
- // Return the file offset.
+ // Return the file offset. This is only valid after
+ // Layout::finalize is finished.
off_t
offset() const
{ return this->offset_; }
is_section_flag_set(elfcpp::Elf_Xword shf) const
{ return this->do_is_section_flag_set(shf); }
- // Set the address and file offset of this data.
+ // Return the output section index, if there is an output section.
+ unsigned int
+ out_shndx() const
+ { return this->do_out_shndx(); }
+
+ // Set the output section index, if this is an output section.
+ void
+ 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.
void
set_address(uint64_t addr, off_t off);
- // Write the data to the output file.
+ // Write the data to the output file. This is called after
+ // Layout::finalize is complete.
void
write(Output_file* file)
{ this->do_write(file); }
+ // This is called by Layout::finalize to note that all sizes must
+ // now be fixed.
+ static void
+ layout_complete()
+ { Output_data::sizes_are_fixed = true; }
+
protected:
// Functions that child classes may or in some cases must implement.
do_is_section_flag_set(elfcpp::Elf_Xword) const
{ return false; }
+ // Return the output section index, if there is an output section.
+ virtual unsigned int
+ do_out_shndx() const
+ { gold_unreachable(); }
+
+ // Set the output section index, if this is an output section.
+ virtual void
+ 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.
+ // be implemented if the child needs to know. The child class can
+ // set its size in this call.
virtual void
do_set_address(uint64_t, off_t)
{ }
// Set the size of the data.
void
set_data_size(off_t data_size)
- { this->data_size_ = data_size; }
+ {
+ gold_assert(!Output_data::sizes_are_fixed);
+ this->data_size_ = data_size;
+ }
// Return default alignment for a size--32 or 64.
static uint64_t
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;
+
// Memory address in file (not always meaningful).
uint64_t address_;
// Size of data in file.
off_t offset_;
};
-// A simple case of Output_data in which we have constant data to
-// output.
-
-class Output_data_const : public Output_data
-{
- public:
- Output_data_const(const std::string& data, uint64_t addralign)
- : Output_data(data.size()), data_(data), addralign_(addralign)
- { }
-
- Output_data_const(const char* p, off_t len, uint64_t addralign)
- : Output_data(len), data_(p, len), addralign_(addralign)
- { }
-
- // Write the data to the file.
- void
- do_write(Output_file* output);
-
- // Return the required alignment.
- uint64_t
- do_addralign() const
- { return this->addralign_; }
-
- private:
- std::string data_;
- uint64_t addralign_;
-};
-
// 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&,
+ Output_section_headers(const Layout*,
+ const Layout::Segment_list*,
+ const Layout::Section_list*,
const Stringpool*);
// Write the data to the file.
// Return the required alignment.
uint64_t
do_addralign() const
- { return Output_data::default_alignment(this->size_); }
+ { return Output_data::default_alignment(parameters->get_size()); }
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& section_list_;
+ const Layout* layout_;
+ const Layout::Segment_list* segment_list_;
+ const Layout::Section_list* unattached_section_list_;
const Stringpool* secnamepool_;
};
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);
// Write the data to the file.
void
// Return the required alignment.
uint64_t
do_addralign() const
- { return Output_data::default_alignment(this->size_); }
+ { return Output_data::default_alignment(parameters->get_size()); }
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*);
// Return the required alignment.
uint64_t
do_addralign() const
- { return Output_data::default_alignment(this->size_); }
+ { return Output_data::default_alignment(parameters->get_size()); }
// Set the address and offset--we only implement this for error
// checking.
void
do_set_address(uint64_t, off_t off) const
- { assert(off == 0); }
+ { gold_assert(off == 0); }
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_;
const Target* target_;
const Symbol_table* symtab_;
const Output_segment_headers* segment_header_;
const Output_section* shstrtab_;
};
+// Output sections are mainly comprised of input sections. However,
+// there are cases where we have data to write out which is not in an
+// input section. Output_section_data is used in such cases. This is
+// an abstract base class.
+
+class Output_section_data : public Output_data
+{
+ public:
+ Output_section_data(off_t data_size, uint64_t addralign)
+ : Output_data(data_size), output_section_(NULL), addralign_(addralign)
+ { }
+
+ Output_section_data(uint64_t addralign)
+ : Output_data(0), 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);
+
+ // 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 output address is known.
+ // OUTPUT_SECTION_ADDRESS is the address of the output section which
+ // this is a part of. If this function returns true, it sets
+ // *POUTPUT to the output address.
+ virtual bool
+ output_address(const Relobj* object, unsigned int shndx, off_t offset,
+ uint64_t output_section_address, uint64_t *poutput) const
+ {
+ return this->do_output_address(object, shndx, offset,
+ output_section_address, poutput);
+ }
+
+ 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_address.
+ virtual bool
+ do_output_address(const Relobj*, unsigned int, off_t, uint64_t,
+ uint64_t*) const
+ { return false; }
+
+ // Return the required alignment.
+ uint64_t
+ do_addralign() const
+ { return this->addralign_; }
+
+ // 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; }
+
+ private:
+ // The output section for this section.
+ const Output_section* output_section_;
+ // The required alignment.
+ uint64_t addralign_;
+};
+
+// A simple case of Output_data in which we have constant data to
+// output.
+
+class Output_data_const : public Output_section_data
+{
+ public:
+ Output_data_const(const std::string& data, uint64_t addralign)
+ : Output_section_data(data.size(), addralign), data_(data)
+ { }
+
+ Output_data_const(const char* p, off_t len, uint64_t addralign)
+ : Output_section_data(len, addralign), data_(p, len)
+ { }
+
+ Output_data_const(const unsigned char* p, off_t len, uint64_t addralign)
+ : Output_section_data(len, addralign),
+ 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());
+ }
+
+ // Write the data to the output file.
+ void
+ do_write(Output_file*);
+
+ private:
+ std::string data_;
+};
+
+// Another version of Output_data with constant data, in which the
+// buffer is allocated by the caller.
+
+class Output_data_const_buffer : public Output_section_data
+{
+ public:
+ Output_data_const_buffer(const unsigned char* p, off_t len,
+ uint64_t addralign)
+ : Output_section_data(len, addralign), p_(p)
+ { }
+
+ // Write the data the output file.
+ void
+ do_write(Output_file*);
+
+ private:
+ const unsigned char* p_;
+};
+
+// A place holder for data written out via some other mechanism.
+
+class Output_data_space : public Output_section_data
+{
+ public:
+ Output_data_space(off_t data_size, uint64_t addralign)
+ : Output_section_data(data_size, addralign)
+ { }
+
+ explicit Output_data_space(uint64_t addralign)
+ : Output_section_data(addralign)
+ { }
+
+ // Set the size.
+ void
+ set_space_size(off_t space_size)
+ { this->set_data_size(space_size); }
+
+ // Set the alignment.
+ void
+ set_space_alignment(uint64_t align)
+ { this->set_addralign(align); }
+
+ // Write out the data--this must be handled elsewhere.
+ void
+ do_write(Output_file*)
+ { }
+};
+
+// A string table which goes into an output section.
+
+class Output_data_strtab : public Output_section_data
+{
+ public:
+ Output_data_strtab(Stringpool* strtab)
+ : Output_section_data(1), strtab_(strtab)
+ { }
+
+ // 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);
+
+ // Write out the data.
+ void
+ do_write(Output_file*);
+
+ private:
+ Stringpool* strtab_;
+};
+
+// This POD class is used to represent a single reloc in the output
+// file. This could be a private class within Output_data_reloc, but
+// the templatization is complex enough that I broke it out into a
+// separate class. The class is templatized on either elfcpp::SHT_REL
+// 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.
+
+template<int sh_type, bool dynamic, int size, bool big_endian>
+class Output_reloc;
+
+template<bool dynamic, int size, bool big_endian>
+class Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>
+{
+ public:
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
+
+ // An uninitialized entry. We need this because we want to put
+ // instances of this class into an STL container.
+ Output_reloc()
+ : local_sym_index_(INVALID_CODE)
+ { }
+
+ // 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;
+ }
+
+ 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;
+ }
+
+ // 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)
+ : 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;
+ }
+
+ 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;
+ }
+
+ // 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;
+ }
+
+ 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)
+ {
+ gold_assert(shndx != INVALID_CODE);
+ this->u1_.os = os;
+ this->u2_.relobj = relobj;
+ }
+
+ // Write the reloc entry to an output view.
+ void
+ write(unsigned char* pov) const;
+
+ // Write the offset and info fields to Write_rel.
+ template<typename Write_rel>
+ void write_rel(Write_rel*) const;
+
+ private:
+ // Return the symbol index. We can't do a double template
+ // specialization, so we do a secondary template here.
+ unsigned int
+ get_symbol_index() const;
+
+ // Codes for local_sym_index_.
+ enum
+ {
+ // Global symbol.
+ GSYM_CODE = -1U,
+ // Output section.
+ SECTION_CODE = -2U,
+ // Invalid uninitialized entry.
+ INVALID_CODE = -3U
+ };
+
+ 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.
+ 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.
+ Symbol* gsym;
+ // For a relocation against an output section, 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
+ // 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.
+ unsigned int local_sym_index_;
+ // The reloc type--a processor specific code.
+ unsigned int type_;
+ // 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.
+ unsigned int shndx_;
+};
+
+// The SHT_RELA version of Output_reloc<>. This is just derived from
+// the SHT_REL version of Output_reloc, but it adds an addend.
+
+template<bool dynamic, int size, bool big_endian>
+class Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>
+{
+ public:
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Addend;
+
+ // An uninitialized entry.
+ Output_reloc()
+ : rel_()
+ { }
+
+ // 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)
+ { }
+
+ Output_reloc(Symbol* gsym, unsigned int type, Relobj* relobj,
+ unsigned int shndx, Address address, Addend addend)
+ : rel_(gsym, type, relobj, shndx, address), 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)
+ { }
+
+ 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),
+ addend_(addend)
+ { }
+
+ // A reloc against the STT_SECTION symbol of an output section.
+
+ Output_reloc(Output_section* os, unsigned int type, Output_data* od,
+ Address address, Addend addend)
+ : rel_(os, type, od, address), addend_(addend)
+ { }
+
+ Output_reloc(Output_section* os, unsigned int type, Relobj* relobj,
+ unsigned int shndx, Address address, Addend addend)
+ : rel_(os, type, relobj, shndx, address), addend_(addend)
+ { }
+
+ // Write the reloc entry to an output view.
+ void
+ write(unsigned char* pov) const;
+
+ private:
+ // The basic reloc.
+ Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> rel_;
+ // The addend.
+ Addend addend_;
+};
+
+// Output_data_reloc is used to manage a section containing relocs.
+// SH_TYPE is either elfcpp::SHT_REL or elfcpp::SHT_RELA. DYNAMIC
+// indicates whether this is a dynamic relocation or a normal
+// relocation. Output_data_reloc_base is a base class.
+// Output_data_reloc is the real class, which we specialize based on
+// the reloc type.
+
+template<int sh_type, bool dynamic, int size, bool big_endian>
+class Output_data_reloc_base : public Output_section_data
+{
+ public:
+ typedef Output_reloc<sh_type, dynamic, size, big_endian> Output_reloc_type;
+ typedef typename Output_reloc_type::Address Address;
+ static const int reloc_size =
+ Reloc_types<sh_type, size, big_endian>::reloc_size;
+
+ // Construct the section.
+ Output_data_reloc_base()
+ : Output_section_data(Output_data::default_alignment(size))
+ { }
+
+ // 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);
+
+ // Add a relocation entry.
+ void
+ add(const Output_reloc_type& reloc)
+ {
+ this->relocs_.push_back(reloc);
+ this->set_data_size(this->relocs_.size() * reloc_size);
+ }
+
+ private:
+ typedef std::vector<Output_reloc_type> Relocs;
+
+ Relocs relocs_;
+};
+
+// The class which callers actually create.
+
+template<int sh_type, bool dynamic, int size, bool big_endian>
+class Output_data_reloc;
+
+// The SHT_REL version of Output_data_reloc.
+
+template<bool dynamic, int size, bool big_endian>
+class Output_data_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>
+ : public Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, big_endian>
+{
+ private:
+ typedef Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size,
+ big_endian> Base;
+
+ public:
+ 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>()
+ { }
+
+ // 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)); }
+
+ void
+ add_global(Symbol* gsym, unsigned int type, Relobj* relobj,
+ unsigned int shndx, Address address)
+ { this->add(Output_reloc_type(gsym, type, relobj, shndx, address)); }
+
+ // 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(Output_reloc_type(relobj, local_sym_index, 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)); }
+
+
+ // 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)
+ { this->add(Output_reloc_type(os, type, od, address)); }
+
+ 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)); }
+};
+
+// The SHT_RELA version of Output_data_reloc.
+
+template<bool dynamic, int size, bool big_endian>
+class Output_data_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>
+ : public Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, big_endian>
+{
+ private:
+ typedef Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size,
+ big_endian> Base;
+
+ public:
+ typedef typename Base::Output_reloc_type Output_reloc_type;
+ 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>()
+ { }
+
+ // 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)); }
+
+ 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 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, Addend addend)
+ {
+ this->add(Output_reloc_type(relobj, local_sym_index, type, od, address,
+ addend));
+ }
+
+ void
+ add_local(Sized_relobj<size, big_endian>* relobj,
+ unsigned int local_sym_index, unsigned int type,
+ unsigned int shndx, Address address, Addend addend)
+ {
+ this->add(Output_reloc_type(relobj, local_sym_index, type, shndx, address,
+ addend));
+ }
+
+ // 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)); }
+
+ void
+ add_output_section(Output_section* os, unsigned int type, Relobj* relobj,
+ unsigned int shndx, Address address, Addend addend)
+ { this->add(Output_reloc_type(os, type, relobj, shndx, address, addend)); }
+};
+
+// Output_data_got is used to manage a GOT. Each entry in the GOT is
+// for one symbol--either a global symbol or a local symbol in an
+// object. The target specific code adds entries to the GOT as
+// needed.
+
+template<int size, bool big_endian>
+class Output_data_got : public Output_section_data
+{
+ public:
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
+
+ Output_data_got()
+ : Output_section_data(Output_data::default_alignment(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 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 a constant to the GOT. This returns the offset of the new
+ // entry from the start of the GOT.
+ unsigned int
+ add_constant(Valtype constant)
+ {
+ this->entries_.push_back(Got_entry(constant));
+ this->set_got_size();
+ return this->last_got_offset();
+ }
+
+ // Write out the GOT table.
+ void
+ do_write(Output_file*);
+
+ private:
+ // This POD class holds a single GOT entry.
+ class Got_entry
+ {
+ public:
+ // Create a zero entry.
+ Got_entry()
+ : local_sym_index_(CONSTANT_CODE)
+ { this->u_.constant = 0; }
+
+ // Create a global symbol entry.
+ explicit Got_entry(Symbol* gsym)
+ : local_sym_index_(GSYM_CODE)
+ { this->u_.gsym = gsym; }
+
+ // Create a local symbol entry.
+ Got_entry(Object* object, unsigned int local_sym_index)
+ : local_sym_index_(local_sym_index)
+ {
+ gold_assert(local_sym_index != GSYM_CODE
+ && local_sym_index != CONSTANT_CODE);
+ this->u_.object = object;
+ }
+
+ // Create a constant entry. The constant is a host value--it will
+ // be swapped, if necessary, when it is written out.
+ explicit Got_entry(Valtype constant)
+ : local_sym_index_(CONSTANT_CODE)
+ { this->u_.constant = constant; }
+
+ // Write the GOT entry to an output view.
+ void
+ write(unsigned char* pov) const;
+
+ private:
+ enum
+ {
+ GSYM_CODE = -1U,
+ CONSTANT_CODE = -2U
+ };
+
+ union
+ {
+ // For a local symbol, the object.
+ Object* object;
+ // For a global symbol, the symbol.
+ Symbol* gsym;
+ // For a constant, the constant.
+ Valtype constant;
+ } u_;
+ // For a local symbol, the local symbol index. This is GSYM_CODE
+ // for a global symbol, or CONSTANT_CODE for a constant.
+ unsigned int local_sym_index_;
+ };
+
+ typedef std::vector<Got_entry> Got_entries;
+
+ // Return the offset into the GOT of GOT entry I.
+ unsigned int
+ got_offset(unsigned int i) const
+ { return i * (size / 8); }
+
+ // Return the offset into the GOT of the last entry added.
+ unsigned int
+ last_got_offset() const
+ { return this->got_offset(this->entries_.size() - 1); }
+
+ // Set the size of the section.
+ void
+ set_got_size()
+ { this->set_data_size(this->got_offset(this->entries_.size())); }
+
+ // The list of GOT entries.
+ Got_entries entries_;
+};
+
+// Output_data_dynamic is used to hold the data in SHT_DYNAMIC
+// section.
+
+class Output_data_dynamic : public Output_section_data
+{
+ public:
+ Output_data_dynamic(Stringpool* pool)
+ : Output_section_data(Output_data::default_alignment(
+ parameters->get_size())),
+ entries_(), pool_(pool)
+ { }
+
+ // Add a new dynamic entry with a fixed numeric value.
+ void
+ add_constant(elfcpp::DT tag, unsigned int val)
+ { this->add_entry(Dynamic_entry(tag, val)); }
+
+ // Add a new dynamic entry with the address of output data.
+ void
+ 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 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, 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))); }
+
+ void
+ add_string(elfcpp::DT tag, const std::string& str)
+ { this->add_string(tag, str.c_str()); }
+
+ // Set the final data size.
+ void
+ do_set_address(uint64_t, off_t);
+
+ // Write out the dynamic entries.
+ void
+ do_write(Output_file*);
+
+ protected:
+ // Adjust the output section to set the entry size.
+ void
+ do_adjust_output_section(Output_section*);
+
+ 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)
+ { this->u_.val = val; }
+
+ // Create an entry with the size or address of a section.
+ Dynamic_entry(elfcpp::DT tag, const Output_data* od, bool section_size)
+ : tag_(tag),
+ classification_(section_size
+ ? DYNAMIC_SECTION_SIZE
+ : DYNAMIC_SECTION_ADDRESS)
+ { this->u_.od = od; }
+
+ // Create an entry with the address of a symbol.
+ Dynamic_entry(elfcpp::DT tag, const Symbol* sym)
+ : tag_(tag), classification_(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)
+ { 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;
+
+ private:
+ enum Classification
+ {
+ // Number.
+ DYNAMIC_NUMBER,
+ // Section address.
+ DYNAMIC_SECTION_ADDRESS,
+ // Section size.
+ DYNAMIC_SECTION_SIZE,
+ // Symbol adress.
+ DYNAMIC_SYMBOL,
+ // String.
+ DYNAMIC_STRING
+ };
+
+ union
+ {
+ // For DYNAMIC_NUMBER.
+ unsigned int val;
+ // For DYNAMIC_SECTION_ADDRESS and DYNAMIC_SECTION_SIZE.
+ const Output_data* od;
+ // For DYNAMIC_SYMBOL.
+ const Symbol* sym;
+ // For DYNAMIC_STRING.
+ const char* str;
+ } u_;
+ // The dynamic tag.
+ elfcpp::DT tag_;
+ // The type of entry.
+ Classification classification_;
+ };
+
+ // Add an entry to the list.
+ void
+ add_entry(const Dynamic_entry& entry)
+ { this->entries_.push_back(entry); }
+
+ // Sized version of write function.
+ template<int size, bool big_endian>
+ void
+ sized_write(Output_file* of);
+
+ // The type of the list of entries.
+ typedef std::vector<Dynamic_entry> Dynamic_entries;
+
+ // The entries.
+ Dynamic_entries entries_;
+ // The pool used for strings.
+ Stringpool* pool_;
+};
+
// 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,
- unsigned int shndx);
+ Output_section(const char* name, elfcpp::Elf_Word, elfcpp::Elf_Xword);
virtual ~Output_section();
- // Add a new input section named NAME with header SHDR from object
- // OBJECT. Return the offset within the output section.
+ // Add a new input section SHNDX, named NAME, with header SHDR, from
+ // object OBJECT. Return the offset within the output section.
template<int size, bool big_endian>
off_t
- add_input_section(Object* object, const char *name,
+ add_input_section(Relobj* object, unsigned int shndx, const char *name,
const elfcpp::Shdr<size, big_endian>& shdr);
+ // Add generated data POSD to this output section.
+ void
+ add_output_section_data(Output_section_data* posd);
+
// Return the section name.
const char*
name() const
flags() const
{ return this->flags_; }
- // Return the address alignment.
- uint64_t
- addralign() const
- { return this->addralign_; }
-
- // Return the section index.
+ // Return the section index in the output file.
unsigned int
- shndx() const
- { return this->shndx_; }
+ do_out_shndx() const
+ { return this->out_shndx_; }
+
+ // Set the output section index.
+ void
+ do_set_out_shndx(unsigned int shndx)
+ { this->out_shndx_ = shndx; }
+
+ // Return the entsize field.
+ uint64_t
+ entsize() const
+ { return this->entsize_; }
// Set the entsize field.
void
- set_entsize(uint64_t v)
- { this->entsize_ = v; }
+ set_entsize(uint64_t v);
+
+ // 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.
+ // 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);
+ return this->info_;
+ }
- // Set the info field.
+ // Set the info field to the output section index of a section.
+ void
+ set_info_section(const Output_data* od)
+ {
+ gold_assert(this->info_ == 0);
+ this->info_section_ = od;
+ }
+
+ // Set the info field to a constant.
void
set_info(unsigned int v)
- { this->info_ = v; }
+ {
+ gold_assert(this->info_section_ == NULL);
+ this->info_ = v;
+ }
// Set the addralign field.
void
set_addralign(uint64_t v)
{ this->addralign_ = v; }
+ // Indicate that we need a symtab index.
+ void
+ set_needs_symtab_index()
+ { this->needs_symtab_index_ = true; }
+
+ // Return whether we need a symtab index.
+ bool
+ needs_symtab_index() const
+ { return this->needs_symtab_index_; }
+
+ // Get the symtab index.
+ unsigned int
+ symtab_index() const
+ {
+ gold_assert(this->symtab_index_ != 0);
+ return this->symtab_index_;
+ }
+
+ // Set the symtab index.
+ void
+ set_symtab_index(unsigned int index)
+ {
+ gold_assert(index != 0);
+ this->symtab_index_ = index;
+ }
+
+ // Indicate that we need a dynsym index.
+ void
+ set_needs_dynsym_index()
+ { this->needs_dynsym_index_ = true; }
+
+ // Return whether we need a dynsym index.
+ bool
+ needs_dynsym_index() const
+ { return this->needs_dynsym_index_; }
+
+ // Get the dynsym index.
+ unsigned int
+ dynsym_index() const
+ {
+ gold_assert(this->dynsym_index_ != 0);
+ return this->dynsym_index_;
+ }
+
+ // Set the dynsym index.
+ void
+ set_dynsym_index(unsigned int index)
+ {
+ gold_assert(index != 0);
+ this->dynsym_index_ = index;
+ }
+
+ // 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;
+
+ // Set the address 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
+ // here.
+ void
+ do_set_address(uint64_t, off_t);
+
// Write the data to the file. For a typical Output_section, this
- // does nothing. We write out the data by looping over all the
- // input sections.
- virtual void
- do_write(Output_file*)
- { }
+ // 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
+ do_write(Output_file*);
// Return the address alignment--function required by parent class.
uint64_t
// Write the section header into *OPHDR.
template<int size, bool big_endian>
void
- write_header(const Stringpool*, elfcpp::Shdr_write<size, big_endian>*) const;
+ write_header(const Layout*, const Stringpool*,
+ elfcpp::Shdr_write<size, big_endian>*) const;
private:
+ // In some cases we need to keep a list of the input sections
+ // associated with this output section. We only need the list if we
+ // might have to change the offsets of the input section within the
+ // output section after we add the input section. The ordinary
+ // input sections will be written out when we process the object
+ // file, and as such we don't need to track them here. We do need
+ // to track Output_section_data objects here. We store instances of
+ // this structure in a std::vector, so it must be a POD. There can
+ // be many instances of this structure, so we use a union to save
+ // some space.
+ class Input_section
+ {
+ public:
+ Input_section()
+ : 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)))
+ {
+ 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_(OUTPUT_SECTION_CODE),
+ p2align_(ffsll(static_cast<long long>(posd->addralign())))
+ {
+ 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_(ffsll(static_cast<long long>(posd->addralign())))
+ {
+ this->u1_.entsize = entsize;
+ this->u2_.posd = posd;
+ }
+
+ // The required alignment.
+ uint64_t
+ addralign() const
+ {
+ return (this->p2align_ == 0
+ ? 0
+ : static_cast<uint64_t>(1) << (this->p2align_ - 1));
+ }
+
+ // Return the required size.
+ off_t
+ data_size() const;
+
+ // Return whether this is a merge section which matches the
+ // parameters.
+ bool
+ is_merge_section(bool is_string, uint64_t entsize) const
+ {
+ return (this->shndx_ == (is_string
+ ? MERGE_STRING_SECTION_CODE
+ : MERGE_DATA_SECTION_CODE)
+ && this->u1_.entsize == entsize);
+ }
+
+ // 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.
+ void
+ set_address(uint64_t addr, off_t off, off_t secoff);
+
+ // 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 address is known.
+ // OUTPUT_SECTION_ADDRESS is the address of the output section
+ // which this is a part of. If this function returns true, it
+ // sets *POUTPUT to the output address.
+ bool
+ output_address(const Relobj* object, unsigned int shndx, off_t offset,
+ uint64_t output_section_address, uint64_t *poutput) const;
+
+ // Write out the data. This does nothing for an input section.
+ void
+ write(Output_file*);
+
+ private:
+ // 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
+ };
+
+ // 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);
+ }
+
+ // 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_;
+ union
+ {
+ // 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;
+ // For OUTPUT_SECTION_CODE or MERGE_DATA_SECTION_CODE or
+ // MERGE_STRING_SECTION_CODE, the data.
+ Output_section_data* posd;
+ } u2_;
+ };
+
+ typedef std::vector<Input_section> Input_section_list;
+
+ // Fill data. This is used to fill in data between input sections.
+ // 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. For a fill we record the
+ // offset, and the actual data to be written out.
+ class Fill
+ {
+ public:
+ Fill(off_t section_offset, off_t length)
+ : section_offset_(section_offset), length_(length)
+ { }
+
+ // Return section offset.
+ off_t
+ section_offset() const
+ { return this->section_offset_; }
+
+ // Return fill length.
+ off_t
+ length() const
+ { return this->length_; }
+
+ private:
+ // The offset within the output section.
+ off_t section_offset_;
+ // The length of the space to fill.
+ off_t 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);
+
// Most of these fields are only valid after layout.
// The name of the section. This will point into a Stringpool.
// The section entry size.
uint64_t entsize_;
// 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_data* info_section_;
+ // If info_section_ is NULL, this is the section info field.
unsigned int info_;
// The section type.
elfcpp::Elf_Word type_;
// The section flags.
elfcpp::Elf_Xword flags_;
// The section index.
- unsigned int shndx_;
-};
-
-// A special Output_section which represents the symbol table
-// (SHT_SYMTAB).
-
-class Output_section_symtab : public Output_section
-{
- public:
- Output_section_symtab(const char* name, off_t size, unsigned int shndx);
-};
-
-// A special Output_section which holds a string table.
-
-class Output_section_strtab : public Output_section
-{
- public:
- Output_section_strtab(const char* name, Stringpool* contents,
- unsigned int shndx);
-
- // Write out the data.
- void
- do_write(Output_file*);
-
- private:
- Stringpool* contents_;
+ unsigned int out_shndx_;
+ // If there is a STT_SECTION for this output section in the normal
+ // symbol table, this is the symbol index. This starts out as zero.
+ // It is initialized in Layout::finalize() to be the index, or -1U
+ // if there isn't one.
+ unsigned int symtab_index_;
+ // If there is a STT_SECTION for this output section in the dynamic
+ // symbol table, this is the symbol index. This starts out as zero.
+ // It is initialized in Layout::finalize() to be the index, or -1U
+ // if there isn't one.
+ unsigned int dynsym_index_;
+ // The input sections. This will be empty in cases where we don't
+ // need to keep track of them.
+ Input_section_list input_sections_;
+ // The offset of the first entry in input_sections_.
+ off_t first_input_offset_;
+ // 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_;
+ // 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.
+ bool needs_symtab_index_ : 1;
+ // Whether this output section needs a STT_SECTION symbol in the
+ // 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;
};
// An output segment. PT_LOAD segments are built from collections of
memsz() const
{ return this->memsz_; }
+ // Return the file size.
+ off_t
+ filesz() const
+ { return this->filesz_; }
+
// Return the maximum alignment of the Output_data.
uint64_t
- max_data_align() const;
+ addralign();
// Add an Output_section to this segment.
void
- add_output_section(Output_section*, elfcpp::Elf_Word seg_flags);
+ add_output_section(Output_section* os, elfcpp::Elf_Word seg_flags)
+ { this->add_output_section(os, seg_flags, false); }
+
+ // Add an Output_section to the start of this segment.
+ void
+ add_initial_output_section(Output_section* os, elfcpp::Elf_Word seg_flags)
+ { this->add_output_section(os, seg_flags, true); }
// Add an Output_data (which is not an Output_section) to the start
// of this segment.
// 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. Return the address of the
- // immediately following segment. Update *POFF. This should only
- // be called for a PT_LOAD segment.
+ // 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.
uint64_t
- set_section_addresses(uint64_t addr, off_t* poff);
+ set_section_addresses(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_addralign(uint64_t align)
+ {
+ gold_assert(!this->is_align_known_);
+ this->align_ = align;
+ }
// Set the offset of this segment based on the section. This should
// only be called for a non-PT_LOAD segment.
// Write the segment header into *OPHDR.
template<int size, bool big_endian>
void
- write_header(elfcpp::Phdr_write<size, big_endian>*) const;
+ write_header(elfcpp::Phdr_write<size, big_endian>*);
// 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 ACCEPT_SIZE_ENDIAN) const;
+ write_section_headers(const Layout*, const Stringpool*, unsigned char* v,
+ unsigned int* pshndx ACCEPT_SIZE_ENDIAN) 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*);
+
// Set the section addresses in an Output_data_list.
uint64_t
- set_section_list_addresses(Output_data_list*, uint64_t addr, off_t* poff);
+ set_section_list_addresses(Output_data_list*, uint64_t addr, off_t* poff,
+ unsigned int* pshndx);
// Return the number of Output_sections in an Output_data_list.
unsigned int
// 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 ACCEPT_SIZE_ENDIAN) const;
+ write_section_headers_list(const Layout*, const Stringpool*,
+ const Output_data_list*, unsigned char* v,
+ unsigned int* pshdx ACCEPT_SIZE_ENDIAN) 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.
+ // The segment alignment. The is_align_known_ field indicates
+ // whether this has been finalized. It can be set to a minimum
+ // value before it is finalized.
uint64_t align_;
// The offset of the segment data within the file.
off_t offset_;
elfcpp::Elf_Word type_;
// The segment flags.
elfcpp::Elf_Word flags_;
+ // Whether we have finalized align_.
+ bool is_align_known_;
};
// This class represents the output file.
class Output_file
{
public:
- Output_file(const General_options& options);
+ Output_file(const General_options& options, Target*);
+
+ // Get a pointer to the target.
+ Target*
+ target() const
+ { return this->target_; }
// Open the output file. FILE_SIZE is the final size of the file.
void
unsigned char*
get_output_view(off_t start, off_t size)
{
- assert(start >= 0 && size >= 0 && start + size <= this->file_size_);
+ gold_assert(start >= 0 && size >= 0 && start + size <= this->file_size_);
return this->base_ + start;
}
private:
// General options.
const General_options& options_;
+ // Target.
+ Target* target_;
// File name.
const char* name_;
// File descriptor.
projects / deliverable / binutils-gdb.git / blobdiff