// layout.h -- lay out output file sections 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_LAYOUT_H
#define GOLD_LAYOUT_H
#include "workqueue.h"
#include "object.h"
+#include "dynobj.h"
#include "stringpool.h"
namespace gold
class Symbol_table;
class Output_section_data;
class Output_section;
-class Output_section_symtab;
class Output_section_headers;
class Output_segment;
class Output_data;
+class Output_data_dynamic;
class Target;
// This task function handles mapping the input sections to output
// output section.
template<int size, bool big_endian>
Output_section*
- layout(Object *object, unsigned int shndx, const char* name,
+ layout(Relobj *object, unsigned int shndx, const char* name,
const elfcpp::Shdr<size, big_endian>& shdr, off_t* offset);
// Add an Output_section_data to the layout. This is used for
elfcpp::Elf_Xword flags,
Output_section_data*);
+ // Create dynamic sections if necessary.
+ void
+ create_initial_dynamic_sections(const Input_objects*, Symbol_table*);
+
+ // Define __start and __stop symbols for output sections.
+ void
+ define_section_symbols(Symbol_table*, const Target*);
+
// Return the Stringpool used for symbol names.
const Stringpool*
sympool() const
{ return &this->sympool_; }
+ // Return the Stringpool used for dynamic symbol names and dynamic
+ // tags.
+ const Stringpool*
+ dynpool() const
+ { return &this->dynpool_; }
+
// Return whether a section is a .gnu.linkonce section, given the
// section name.
static inline bool
off_t
finalize(const Input_objects*, Symbol_table*);
- // Return the TLS segment.
+ // Return the TLS segment. This will return NULL if there isn't
+ // one.
Output_segment*
tls_segment() const
{ return this->tls_segment_; }
+ // Return the normal symbol table.
+ Output_section*
+ symtab_section() const
+ {
+ gold_assert(this->symtab_section_ != NULL);
+ return this->symtab_section_;
+ }
+
+ // Return the dynamic symbol table.
+ Output_section*
+ dynsym_section() const
+ {
+ gold_assert(this->dynsym_section_ != NULL);
+ return this->dynsym_section_;
+ }
+
+ // Return the dynamic tags.
+ Output_data_dynamic*
+ dynamic_data() const
+ { return this->dynamic_data_; }
+
// Write out data not associated with an input file or the symbol
// table.
void
- write_data(Output_file*) const;
+ write_data(const Symbol_table*, const Target*, Output_file*) const;
// Return an output section named NAME, or NULL if there is none.
Output_section*
// The list of sections not attached to a segment.
- typedef std::list<Output_section*> Section_list;
+ typedef std::vector<Output_section*> Section_list;
// The list of information to write out which is not attached to
// either a section or a segment.
- typedef std::list<Output_data*> Data_list;
+ typedef std::vector<Output_data*> Data_list;
private:
Layout(const Layout&);
Output_segment*
find_first_load_seg();
- // Set the final file offsets of all the segments.
- off_t
- set_segment_offsets(const Target*, Output_segment*, unsigned int* pshndx);
-
- // Set the final file offsets and section indices of all the
- // sections not associated with a segment.
- off_t
- set_section_offsets(off_t, unsigned int *pshndx);
-
// Create the output sections for the symbol table.
void
- create_symtab_sections(int size, const Input_objects*, Symbol_table*, off_t*,
- Output_section** osymtab,
- Output_section** ostrtab);
+ create_symtab_sections(int size, const Input_objects*, Symbol_table*,
+ off_t*);
// Create the .shstrtab section.
Output_section*
Output_section_headers*
create_shdrs(int size, bool big_endian, off_t*);
+ // Create the dynamic symbol table.
+ void
+ create_dynamic_symtab(const Target*, Symbol_table*, Output_section** pdynstr,
+ unsigned int* plocal_dynamic_count,
+ std::vector<Symbol*>* pdynamic_symbols,
+ Versions* versions);
+
+ // Finish the .dynamic section and PT_DYNAMIC segment.
+ void
+ finish_dynamic_section(const Input_objects*, const Symbol_table*);
+
+ // Create the .interp section and PT_INTERP segment.
+ void
+ create_interp(const Target* target);
+
+ // Create the version sections.
+ void
+ create_version_sections(const Target*, const Versions*,
+ unsigned int local_symcount,
+ const std::vector<Symbol*>& dynamic_symbols,
+ const Output_section* dynstr);
+
+ template<int size, bool big_endian>
+ void
+ sized_create_version_sections(const Versions* versions,
+ unsigned int local_symcount,
+ const std::vector<Symbol*>& dynamic_symbols,
+ const Output_section* dynstr
+ ACCEPT_SIZE_ENDIAN);
+
// Return whether to include this section in the link.
template<int size, bool big_endian>
bool
// Return the output section for NAME, TYPE and FLAGS.
Output_section*
- get_output_section(const char* name, elfcpp::Elf_Word type,
- elfcpp::Elf_Xword flags);
+ get_output_section(const char* name, Stringpool::Key name_key,
+ elfcpp::Elf_Word type, elfcpp::Elf_Xword flags);
// Create a new Output_section.
Output_section*
make_output_section(const char* name, elfcpp::Elf_Word type,
elfcpp::Elf_Xword flags);
+ // Set the final file offsets of all the segments.
+ off_t
+ set_segment_offsets(const Target*, Output_segment*, unsigned int* pshndx);
+
+ // Set the final file offsets and section indexes of all the
+ // sections not associated with a segment.
+ off_t
+ set_section_offsets(off_t, unsigned int *pshndx);
+
// Return whether SEG1 comes before SEG2 in the output file.
static bool
segment_precedes(const Output_segment* seg1, const Output_segment* seg2);
// Mapping from input section name/type/flags to output section. We
// use canonicalized strings here.
- typedef std::pair<const char*,
+ typedef std::pair<Stringpool::Key,
std::pair<elfcpp::Elf_Word, elfcpp::Elf_Xword> > Key;
struct Hash_key
Stringpool namepool_;
// The output symbol names.
Stringpool sympool_;
+ // The dynamic strings, if needed.
+ Stringpool dynpool_;
// The list of group sections and linkonce sections which we have seen.
Signatures signatures_;
// The mapping from input section name/type/flags to output sections.
Section_name_map section_name_map_;
// The list of output segments.
Segment_list segment_list_;
+ // The list of output sections.
+ Section_list section_list_;
// The list of output sections which are not attached to any output
// segment.
- Section_list section_list_;
- // The list of sections which require special output because they
- // are not comprised of input sections.
+ Section_list unattached_section_list_;
+ // The list of unattached Output_data objects which require special
+ // handling because they are not Output_sections.
Data_list special_output_list_;
// A pointer to the PT_TLS segment if there is one.
Output_segment* tls_segment_;
+ // The SHT_SYMTAB output section.
+ Output_section* symtab_section_;
+ // The SHT_DYNSYM output section if there is one.
+ Output_section* dynsym_section_;
+ // The SHT_DYNAMIC output section if there is one.
+ Output_section* dynamic_section_;
+ // The dynamic data which goes into dynamic_section_.
+ Output_data_dynamic* dynamic_data_;
};
// This task handles writing out data which is not part of a section
class Write_data_task : public Task
{
public:
- Write_data_task(const Layout* layout, Output_file* of,
+ Write_data_task(const Layout* layout, const Symbol_table* symtab,
+ const Target* target, Output_file* of,
Task_token* final_blocker)
- : layout_(layout), of_(of), final_blocker_(final_blocker)
+ : layout_(layout), symtab_(symtab), target_(target), of_(of),
+ final_blocker_(final_blocker)
{ }
// The standard Task methods.
private:
const Layout* layout_;
+ const Symbol_table* symtab_;
+ const Target* target_;
Output_file* of_;
Task_token* final_blocker_;
};
{
public:
Write_symbols_task(const Symbol_table* symtab, const Target* target,
- const Stringpool* sympool, Output_file* of,
- Task_token* final_blocker)
- : symtab_(symtab), target_(target), sympool_(sympool), of_(of),
- final_blocker_(final_blocker)
+ const Stringpool* sympool, const Stringpool* dynpool,
+ Output_file* of, Task_token* final_blocker)
+ : symtab_(symtab), target_(target), sympool_(sympool), dynpool_(dynpool),
+ of_(of), final_blocker_(final_blocker)
{ }
// The standard Task methods.
const Symbol_table* symtab_;
const Target* target_;
const Stringpool* sympool_;
+ const Stringpool* dynpool_;
Output_file* of_;
Task_token* final_blocker_;
};
projects / binutils-gdb.git / blobdiff