#include <utility>
#include <vector>
-#include "options.h"
#include "workqueue.h"
#include "object.h"
+#include "dynobj.h"
#include "stringpool.h"
namespace gold
{
+class General_options;
+class Input_objects;
+class Symbol_table;
+class Output_section_data;
class Output_section;
+class Output_section_headers;
class Output_segment;
+class Output_data;
+class Output_data_dynamic;
+class Target;
-// This Task handles mapping the input sections to output sections and
-// laying them out in memory.
+// This task function handles mapping the input sections to output
+// sections and laying them out in memory.
-class Layout_task : public Task
+class Layout_task_runner : public Task_function_runner
{
public:
// OPTIONS is the command line options, INPUT_OBJECTS is the list of
- // input objects, THIS_BLOCKER is a token which blocks this task
- // from executing until all the input symbols have been read.
- Layout_task(const General_options& options, const Object_list* input_objects,
- Task_token* this_blocker)
- : options_(options), input_objects_(input_objects),
- this_blocker_(this_blocker)
+ // input objects, SYMTAB is the symbol table, LAYOUT is the layout
+ // object.
+ Layout_task_runner(const General_options& options,
+ const Input_objects* input_objects,
+ Symbol_table* symtab,
+ Layout* layout)
+ : options_(options), input_objects_(input_objects), symtab_(symtab),
+ layout_(layout)
{ }
- ~Layout_task();
-
- // The standard Task methods.
-
- Is_runnable_type
- is_runnable(Workqueue*);
-
- Task_locker*
- locks(Workqueue*);
-
+ // Run the operation.
void
run(Workqueue*);
private:
- Layout_task(const Layout_task&);
- Layout_task& operator=(const Layout_task&);
+ Layout_task_runner(const Layout_task_runner&);
+ Layout_task_runner& operator=(const Layout_task_runner&);
const General_options& options_;
- const Object_list* input_objects_;
- Task_token* this_blocker_;
+ const Input_objects* input_objects_;
+ Symbol_table* symtab_;
+ Layout* layout_;
};
// This class handles the details of laying out input sections.
class Layout
{
public:
- Layout(const General_options& options)
- : options_(options), namepool_(), signatures_(),
- section_name_map_(), segment_list_()
- { }
+ Layout(const General_options& options);
- // Given an input section named NAME with data in SHDR from the
- // object file OBJECT, return the output section where this input
- // section should go. Set *OFFSET to the offset within the output
- // section.
+ // Given an input section SHNDX, named NAME, with data in SHDR, from
+ // the object file OBJECT, return the output section where this
+ // input section should go. Set *OFFSET to the offset within the
+ // output section.
template<int size, bool big_endian>
Output_section*
- layout(Object *object, 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
+ // special sections like the GOT section.
+ void
+ add_output_section_data(const char* name, elfcpp::Elf_Word type,
+ elfcpp::Elf_Xword flags,
+ Output_section_data*);
+
+ // Create dynamic sections if necessary.
+ void
+ create_initial_dynamic_sections(const Input_objects*, Symbol_table*);
+
+ // 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
bool
add_comdat(const char*, bool group);
+ // Finalize the layout after all the input sections have been added.
+ off_t
+ finalize(const Input_objects*, Symbol_table*);
+
+ // 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(const Symbol_table*, const Target*, Output_file*) const;
+
+ // Return an output section named NAME, or NULL if there is none.
+ Output_section*
+ find_output_section(const char* name) const;
+
+ // Return an output segment of type TYPE, with segment flags SET set
+ // and segment flags CLEAR clear. Return NULL if there is none.
+ Output_segment*
+ find_output_segment(elfcpp::PT type, elfcpp::Elf_Word set,
+ elfcpp::Elf_Word clear) const;
+
+ // The list of segments.
+
+ typedef std::vector<Output_segment*> Segment_list;
+
+ // The list of sections not attached to a segment.
+
+ 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::vector<Output_data*> Data_list;
+
private:
Layout(const Layout&);
Layout& operator=(const Layout&);
const char* from;
int fromlen;
const char* to;
+ int tolen;
};
static const Linkonce_mapping linkonce_mapping[];
static const int linkonce_mapping_count;
+ // Find the first read-only PT_LOAD segment, creating one if
+ // necessary.
+ Output_segment*
+ find_first_load_seg();
+
+ // Create the output sections for the symbol table.
+ void
+ create_symtab_sections(int size, const Input_objects*, Symbol_table*,
+ off_t*);
+
+ // Create the .shstrtab section.
+ Output_section*
+ create_shstrtab();
+
+ // Create the section header table.
+ 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
include_section(Object* object, const char* name,
const elfcpp::Shdr<size, big_endian>&);
+ // Return the output section name to use given an input section
+ // name. Set *PLEN to the length of the name. *PLEN must be
+ // initialized to the length of NAME.
+ static const char*
+ output_section_name(const char* name, size_t* plen);
+
// Return the output section name to use for a linkonce section
- // name.
+ // name. PLEN is as for output_section_name.
static const char*
- linkonce_output_name(const char* name);
+ linkonce_output_name(const char* name, size_t* plen);
+
+ // Return the output section for NAME, TYPE and FLAGS.
+ Output_section*
+ 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
- Layout::segment_precedes(const Output_segment* seg1,
- const Output_segment* seg2);
+ segment_precedes(const Output_segment* seg1, const Output_segment* seg2);
// Map from section flags to segment flags.
static elfcpp::Elf_Word
// 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
{ return Layout::segment_precedes(seg1, seg2); }
};
- // The list of segments.
-
- typedef std::list<Output_segment*> Segment_list;
-
- // The list of sections not attached to a segment.
-
- typedef std::list<Output_section*> Section_list;
-
// A reference to the options on the command line.
const General_options& options_;
// The output section names.
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_;
+ 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
+// or segment.
+
+class Write_data_task : public Task
+{
+ public:
+ Write_data_task(const Layout* layout, const Symbol_table* symtab,
+ const Target* target, Output_file* of,
+ Task_token* final_blocker)
+ : layout_(layout), symtab_(symtab), target_(target), of_(of),
+ final_blocker_(final_blocker)
+ { }
+
+ // The standard Task methods.
+
+ Is_runnable_type
+ is_runnable(Workqueue*);
+
+ Task_locker*
+ locks(Workqueue*);
+
+ void
+ run(Workqueue*);
+
+ private:
+ const Layout* layout_;
+ const Symbol_table* symtab_;
+ const Target* target_;
+ Output_file* of_;
+ Task_token* final_blocker_;
+};
+
+// This task handles writing out the global symbols.
+
+class Write_symbols_task : public Task
+{
+ public:
+ Write_symbols_task(const Symbol_table* symtab, const Target* target,
+ 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.
+
+ Is_runnable_type
+ is_runnable(Workqueue*);
+
+ Task_locker*
+ locks(Workqueue*);
+
+ void
+ run(Workqueue*);
+
+ private:
+ const Symbol_table* symtab_;
+ const Target* target_;
+ const Stringpool* sympool_;
+ const Stringpool* dynpool_;
+ Output_file* of_;
+ Task_token* final_blocker_;
};
+// This task function handles closing the file.
+
+class Close_task_runner : public Task_function_runner
+{
+ public:
+ Close_task_runner(Output_file* of)
+ : of_(of)
+ { }
+
+ // Run the operation.
+ void
+ run(Workqueue*);
+
+ private:
+ Output_file* of_;
+};
+
+// A small helper function to align an address.
+
+inline uint64_t
+align_address(uint64_t address, uint64_t addralign)
+{
+ if (addralign != 0)
+ address = (address + addralign - 1) &~ (addralign - 1);
+ return address;
+}
+
} // End namespace gold.
#endif // !defined(GOLD_LAYOUT_H)
projects / deliverable / binutils-gdb.git / blobdiff