2006-09-22 00:13:18 +02:00
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// output.h -- manage the output file for gold -*- C++ -*-
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#ifndef GOLD_OUTPUT_H
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#define GOLD_OUTPUT_H
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#include <list>
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2006-11-03 19:26:11 +01:00
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#include <vector>
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#include "elfcpp.h"
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#include "layout.h"
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#include "reloc-types.h"
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namespace gold
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{
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class General_options;
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class Object;
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class Symbol;
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class Output_file;
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class Output_section;
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class Target;
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template<int size, bool big_endian>
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class Sized_target;
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template<int size, bool big_endian>
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class Sized_relobj;
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// An abtract class for data which has to go into the output file.
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class Output_data
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{
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public:
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explicit Output_data(off_t data_size = 0)
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: address_(0), data_size_(data_size), offset_(-1)
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{ }
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virtual
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~Output_data();
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// Return the address. This is only valid after Layout::finalize is
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// finished.
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uint64_t
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address() const
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{ return this->address_; }
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// Return the size of the data. This must be valid after
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// Layout::finalize calls set_address, but need not be valid before
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// then.
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off_t
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data_size() const
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{ return this->data_size_; }
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// Return the file offset. This is only valid after
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// Layout::finalize is finished.
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off_t
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offset() const
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{ return this->offset_; }
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// Return the required alignment.
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uint64_t
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addralign() const
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{ return this->do_addralign(); }
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// Return whether this is an Output_section.
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bool
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is_section() const
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{ return this->do_is_section(); }
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// Return whether this is an Output_section of the specified type.
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bool
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is_section_type(elfcpp::Elf_Word stt) const
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{ return this->do_is_section_type(stt); }
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// Return whether this is an Output_section with the specified flag
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// set.
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bool
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is_section_flag_set(elfcpp::Elf_Xword shf) const
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{ return this->do_is_section_flag_set(shf); }
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// Return the output section index, if there is an output section.
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unsigned int
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out_shndx() const
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{ return this->do_out_shndx(); }
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// Set the output section index, if this is an output section.
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void
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set_out_shndx(unsigned int shndx)
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{ this->do_set_out_shndx(shndx); }
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// Set the address and file offset of this data. This is called
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// during Layout::finalize.
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void
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set_address(uint64_t addr, off_t off);
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// Write the data to the output file. This is called after
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// Layout::finalize is complete.
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void
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write(Output_file* file)
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{ this->do_write(file); }
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// This is called by Layout::finalize to note that all sizes must
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// now be fixed.
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static void
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layout_complete()
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{ Output_data::sizes_are_fixed = true; }
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protected:
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// Functions that child classes may or in some cases must implement.
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// Write the data to the output file.
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virtual void
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do_write(Output_file*) = 0;
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// Return the required alignment.
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virtual uint64_t
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do_addralign() const = 0;
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// Return whether this is an Output_section.
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virtual bool
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do_is_section() const
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{ return false; }
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// Return whether this is an Output_section of the specified type.
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// This only needs to be implement by Output_section.
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virtual bool
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do_is_section_type(elfcpp::Elf_Word) const
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{ return false; }
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// Return whether this is an Output_section with the specific flag
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// set. This only needs to be implemented by Output_section.
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virtual bool
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do_is_section_flag_set(elfcpp::Elf_Xword) const
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{ return false; }
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// Return the output section index, if there is an output section.
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virtual unsigned int
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do_out_shndx() const
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{ gold_unreachable(); }
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// Set the output section index, if this is an output section.
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virtual void
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do_set_out_shndx(unsigned int)
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{ gold_unreachable(); }
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// Set the address and file offset of the data. This only needs to
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// be implemented if the child needs to know. The child class can
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// set its size in this call.
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virtual void
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do_set_address(uint64_t, off_t)
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{ }
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// Functions that child classes may call.
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// Set the size of the data.
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void
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set_data_size(off_t data_size)
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{
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gold_assert(!Output_data::sizes_are_fixed);
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this->data_size_ = data_size;
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}
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// Return default alignment for a size--32 or 64.
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static uint64_t
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default_alignment(int size);
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private:
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Output_data(const Output_data&);
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Output_data& operator=(const Output_data&);
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// This is used for verification, to make sure that we don't try to
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// change any sizes after we set the section addresses.
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static bool sizes_are_fixed;
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// Memory address in file (not always meaningful).
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uint64_t address_;
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// Size of data in file.
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off_t data_size_;
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// Offset within file.
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off_t offset_;
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};
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// Output the section headers.
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class Output_section_headers : public Output_data
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{
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public:
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Output_section_headers(int size,
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bool big_endian,
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const Layout*,
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const Layout::Segment_list*,
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const Layout::Section_list*,
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const Stringpool*);
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// Write the data to the file.
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void
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do_write(Output_file*);
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// Return the required alignment.
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uint64_t
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do_addralign() const
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{ return Output_data::default_alignment(this->size_); }
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private:
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// Write the data to the file with the right size and endianness.
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template<int size, bool big_endian>
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void
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do_sized_write(Output_file*);
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int size_;
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bool big_endian_;
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const Layout* layout_;
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const Layout::Segment_list* segment_list_;
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const Layout::Section_list* unattached_section_list_;
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const Stringpool* secnamepool_;
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};
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// Output the segment headers.
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class Output_segment_headers : public Output_data
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{
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public:
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Output_segment_headers(int size, bool big_endian,
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const Layout::Segment_list& segment_list);
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// Write the data to the file.
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void
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do_write(Output_file*);
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// Return the required alignment.
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uint64_t
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do_addralign() const
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{ return Output_data::default_alignment(this->size_); }
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private:
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// Write the data to the file with the right size and endianness.
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template<int size, bool big_endian>
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void
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do_sized_write(Output_file*);
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int size_;
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bool big_endian_;
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const Layout::Segment_list& segment_list_;
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};
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// Output the ELF file header.
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class Output_file_header : public Output_data
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{
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public:
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Output_file_header(int size,
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bool big_endian,
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const General_options&,
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const Target*,
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const Symbol_table*,
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const Output_segment_headers*);
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// Add information about the section headers. We lay out the ELF
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// file header before we create the section headers.
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void set_section_info(const Output_section_headers*,
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const Output_section* shstrtab);
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// Write the data to the file.
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void
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do_write(Output_file*);
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// Return the required alignment.
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uint64_t
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do_addralign() const
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{ return Output_data::default_alignment(this->size_); }
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// Set the address and offset--we only implement this for error
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// checking.
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void
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do_set_address(uint64_t, off_t off) const
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{ gold_assert(off == 0); }
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private:
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// Write the data to the file with the right size and endianness.
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template<int size, bool big_endian>
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void
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do_sized_write(Output_file*);
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int size_;
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bool big_endian_;
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const General_options& options_;
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const Target* target_;
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const Symbol_table* symtab_;
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const Output_segment_headers* segment_header_;
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const Output_section_headers* section_header_;
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const Output_section* shstrtab_;
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};
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// Output sections are mainly comprised of input sections. However,
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// there are cases where we have data to write out which is not in an
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// input section. Output_section_data is used in such cases. This is
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// an abstract base class.
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class Output_section_data : public Output_data
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{
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public:
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Output_section_data(off_t data_size, uint64_t addralign)
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: Output_data(data_size), output_section_(NULL), addralign_(addralign)
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{ }
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Output_section_data(uint64_t addralign)
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: Output_data(0), output_section_(NULL), addralign_(addralign)
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{ }
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// Return the output section.
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const Output_section*
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output_section() const
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{ return this->output_section_; }
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// Record the output section.
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void
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set_output_section(Output_section* os);
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// Add an input section, for SHF_MERGE sections. This returns true
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// if the section was handled.
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bool
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add_input_section(Relobj* object, unsigned int shndx)
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{ return this->do_add_input_section(object, shndx); }
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// Given an input OBJECT, an input section index SHNDX within that
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// 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);
|
|
|
|
}
|
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
protected:
|
|
|
|
// The child class must implement do_write.
|
|
|
|
|
2006-12-01 17:51:25 +01:00
|
|
|
// The child class may implement specific adjustments to the output
|
|
|
|
// section.
|
|
|
|
virtual void
|
|
|
|
do_adjust_output_section(Output_section*)
|
|
|
|
{ }
|
|
|
|
|
2007-05-16 19:42:48 +02:00
|
|
|
// 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; }
|
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
// 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;
|
|
|
|
|
2006-12-01 00:52:50 +01:00
|
|
|
// Set the alignment.
|
|
|
|
void
|
|
|
|
set_addralign(uint64_t addralign)
|
|
|
|
{ this->addralign_ = addralign; }
|
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
private:
|
|
|
|
// The output section for this section.
|
|
|
|
const Output_section* output_section_;
|
|
|
|
// The required alignment.
|
|
|
|
uint64_t addralign_;
|
|
|
|
};
|
|
|
|
|
2006-11-14 20:21:05 +01:00
|
|
|
// A simple case of Output_data in which we have constant data to
|
|
|
|
// output.
|
2006-11-03 19:26:11 +01:00
|
|
|
|
2006-11-14 20:21:05 +01:00
|
|
|
class Output_data_const : public Output_section_data
|
2006-11-03 19:26:11 +01:00
|
|
|
{
|
|
|
|
public:
|
2006-11-14 20:21:05 +01:00
|
|
|
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)
|
|
|
|
{ }
|
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
// 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.
|
2006-11-14 20:21:05 +01:00
|
|
|
void
|
2006-11-29 18:56:40 +01:00
|
|
|
do_write(Output_file*);
|
2006-11-14 20:21:05 +01:00
|
|
|
|
|
|
|
private:
|
|
|
|
std::string data_;
|
|
|
|
};
|
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
// Another version of Output_data with constant data, in which the
|
|
|
|
// buffer is allocated by the caller.
|
2006-11-14 20:21:05 +01:00
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
class Output_data_const_buffer : public Output_section_data
|
2006-11-14 20:21:05 +01:00
|
|
|
{
|
|
|
|
public:
|
2006-11-29 18:56:40 +01:00
|
|
|
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)
|
2006-11-03 19:26:11 +01:00
|
|
|
: Output_section_data(addralign)
|
|
|
|
{ }
|
|
|
|
|
|
|
|
// Set the size.
|
|
|
|
void
|
2006-11-29 18:56:40 +01:00
|
|
|
set_space_size(off_t space_size)
|
|
|
|
{ this->set_data_size(space_size); }
|
2006-11-03 19:26:11 +01:00
|
|
|
|
2006-12-01 00:52:50 +01:00
|
|
|
// Set the alignment.
|
|
|
|
void
|
|
|
|
set_space_alignment(uint64_t align)
|
|
|
|
{ this->set_addralign(align); }
|
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
// Write out the data--this must be handled elsewhere.
|
2006-11-03 19:26:11 +01:00
|
|
|
void
|
|
|
|
do_write(Output_file*)
|
|
|
|
{ }
|
|
|
|
};
|
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
// 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_;
|
|
|
|
};
|
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
// 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.
|
2006-12-01 00:52:50 +01:00
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
Output_reloc(Symbol* gsym, unsigned int type, Output_data* od,
|
|
|
|
Address address)
|
2006-12-01 00:52:50 +01:00
|
|
|
: 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;
|
|
|
|
}
|
2006-11-16 01:38:25 +01:00
|
|
|
|
|
|
|
// A reloc against a local symbol.
|
2006-12-01 00:52:50 +01:00
|
|
|
|
|
|
|
Output_reloc(Sized_relobj<size, big_endian>* relobj,
|
2006-11-16 01:38:25 +01:00
|
|
|
unsigned int local_sym_index,
|
2006-11-29 18:56:40 +01:00
|
|
|
unsigned int type,
|
|
|
|
Output_data* od,
|
|
|
|
Address address)
|
2006-12-01 00:52:50 +01:00
|
|
|
: address_(address), local_sym_index_(local_sym_index), type_(type),
|
|
|
|
shndx_(INVALID_CODE)
|
2006-11-16 01:38:25 +01:00
|
|
|
{
|
2006-11-29 18:56:40 +01:00
|
|
|
gold_assert(local_sym_index != GSYM_CODE
|
|
|
|
&& local_sym_index != INVALID_CODE);
|
2006-12-01 00:52:50 +01:00
|
|
|
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;
|
2006-11-16 01:38:25 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
// A reloc against the STT_SECTION symbol of an output section.
|
2006-12-01 00:52:50 +01:00
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
Output_reloc(Output_section* os, unsigned int type, Output_data* od,
|
|
|
|
Address address)
|
2006-12-01 00:52:50 +01:00
|
|
|
: 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;
|
|
|
|
}
|
2006-11-16 01:38:25 +01:00
|
|
|
|
|
|
|
// 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.
|
2006-12-01 00:52:50 +01:00
|
|
|
Sized_relobj<size, big_endian>* relobj;
|
2006-11-16 01:38:25 +01:00
|
|
|
// 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;
|
2006-12-01 00:52:50 +01:00
|
|
|
} 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_;
|
2006-11-16 01:38:25 +01:00
|
|
|
// 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_;
|
2006-11-29 18:56:40 +01:00
|
|
|
// The reloc type--a processor specific code.
|
2006-11-16 01:38:25 +01:00
|
|
|
unsigned int type_;
|
2006-12-01 00:52:50 +01:00
|
|
|
// 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_;
|
2006-11-16 01:38:25 +01:00
|
|
|
};
|
|
|
|
|
|
|
|
// 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.
|
2006-12-01 00:52:50 +01:00
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
Output_reloc(Symbol* gsym, unsigned int type, Output_data* od,
|
|
|
|
Address address, Addend addend)
|
|
|
|
: rel_(gsym, type, od, address), addend_(addend)
|
2006-11-16 01:38:25 +01:00
|
|
|
{ }
|
|
|
|
|
2006-12-01 00:52:50 +01:00
|
|
|
Output_reloc(Symbol* gsym, unsigned int type, Relobj* relobj,
|
|
|
|
unsigned int shndx, Address address, Addend addend)
|
|
|
|
: rel_(gsym, type, relobj, shndx, address), addend_(addend)
|
|
|
|
{ }
|
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
// A reloc against a local symbol.
|
2006-12-01 00:52:50 +01:00
|
|
|
|
|
|
|
Output_reloc(Sized_relobj<size, big_endian>* relobj,
|
2006-11-16 01:38:25 +01:00
|
|
|
unsigned int local_sym_index,
|
2006-11-29 18:56:40 +01:00
|
|
|
unsigned int type, Output_data* od, Address address,
|
|
|
|
Addend addend)
|
2006-12-01 00:52:50 +01:00
|
|
|
: 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)
|
2006-11-16 01:38:25 +01:00
|
|
|
{ }
|
|
|
|
|
|
|
|
// A reloc against the STT_SECTION symbol of an output section.
|
2006-12-01 00:52:50 +01:00
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
Output_reloc(Output_section* os, unsigned int type, Output_data* od,
|
|
|
|
Address address, Addend addend)
|
|
|
|
: rel_(os, type, od, address), addend_(addend)
|
2006-11-16 01:38:25 +01:00
|
|
|
{ }
|
|
|
|
|
2006-12-01 00:52:50 +01:00
|
|
|
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)
|
|
|
|
{ }
|
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
// 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:
|
2006-12-01 17:51:25 +01:00
|
|
|
// Set the entry size and the link.
|
|
|
|
void
|
|
|
|
do_adjust_output_section(Output_section *os);
|
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
// 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.
|
2006-12-01 00:52:50 +01:00
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
void
|
2006-11-29 18:56:40 +01:00
|
|
|
add_global(Symbol* gsym, unsigned int type, Output_data* od, Address address)
|
|
|
|
{ this->add(Output_reloc_type(gsym, type, od, address)); }
|
2006-11-16 01:38:25 +01:00
|
|
|
|
2006-12-01 00:52:50 +01:00
|
|
|
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)); }
|
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
// Add a reloc against a local symbol.
|
2006-12-01 00:52:50 +01:00
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
void
|
2006-12-01 00:52:50 +01:00
|
|
|
add_local(Sized_relobj<size, big_endian>* relobj,
|
2006-11-29 18:56:40 +01:00
|
|
|
unsigned int local_sym_index, unsigned int type,
|
|
|
|
Output_data* od, Address address)
|
2006-12-01 00:52:50 +01:00
|
|
|
{ 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)); }
|
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
|
|
|
|
// A reloc against the STT_SECTION symbol of an output section.
|
2006-12-01 00:52:50 +01:00
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
void
|
2006-11-29 18:56:40 +01:00
|
|
|
add_output_section(Output_section* os, unsigned int type,
|
|
|
|
Output_data* od, Address address)
|
|
|
|
{ this->add(Output_reloc_type(os, type, od, address)); }
|
2006-12-01 00:52:50 +01:00
|
|
|
|
|
|
|
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)); }
|
2006-11-16 01:38:25 +01:00
|
|
|
};
|
|
|
|
|
|
|
|
// 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.
|
2006-12-01 00:52:50 +01:00
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
void
|
2006-11-29 18:56:40 +01:00
|
|
|
add_global(Symbol* gsym, unsigned int type, Output_data* od,
|
|
|
|
Address address, Addend addend)
|
|
|
|
{ this->add(Output_reloc_type(gsym, type, od, address, addend)); }
|
2006-11-16 01:38:25 +01:00
|
|
|
|
2006-12-01 00:52:50 +01:00
|
|
|
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)); }
|
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
// Add a reloc against a local symbol.
|
2006-12-01 00:52:50 +01:00
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
void
|
2006-12-01 00:52:50 +01:00
|
|
|
add_local(Sized_relobj<size, big_endian>* relobj,
|
2006-11-16 01:38:25 +01:00
|
|
|
unsigned int local_sym_index, unsigned int type,
|
2006-11-29 18:56:40 +01:00
|
|
|
Output_data* od, Address address, Addend addend)
|
2006-11-16 01:38:25 +01:00
|
|
|
{
|
2006-12-01 00:52:50 +01:00
|
|
|
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,
|
2006-11-16 01:38:25 +01:00
|
|
|
addend));
|
|
|
|
}
|
|
|
|
|
|
|
|
// A reloc against the STT_SECTION symbol of an output section.
|
2006-12-01 00:52:50 +01:00
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
void
|
2006-11-29 18:56:40 +01:00
|
|
|
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)); }
|
2006-12-01 00:52:50 +01:00
|
|
|
|
|
|
|
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)); }
|
2006-11-16 01:38:25 +01:00
|
|
|
};
|
|
|
|
|
2006-11-14 20:21:05 +01:00
|
|
|
// 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
|
2006-11-03 19:26:11 +01:00
|
|
|
// object. The target specific code adds entries to the GOT as
|
2006-11-14 20:21:05 +01:00
|
|
|
// needed.
|
2006-11-03 19:26:11 +01:00
|
|
|
|
|
|
|
template<int size, bool big_endian>
|
2006-11-14 20:21:05 +01:00
|
|
|
class Output_data_got : public Output_section_data
|
2006-11-03 19:26:11 +01:00
|
|
|
{
|
|
|
|
public:
|
|
|
|
typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
|
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
Output_data_got(const General_options* options)
|
2006-11-03 19:26:11 +01:00
|
|
|
: Output_section_data(Output_data::default_alignment(size)),
|
2006-11-29 18:56:40 +01:00
|
|
|
options_(options), entries_()
|
2006-11-03 19:26:11 +01:00
|
|
|
{ }
|
|
|
|
|
2006-11-14 20:21:05 +01:00
|
|
|
// 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);
|
2006-11-03 19:26:11 +01:00
|
|
|
|
|
|
|
// 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.
|
2006-11-29 18:56:40 +01:00
|
|
|
explicit Got_entry(Symbol* gsym)
|
2006-11-03 19:26:11 +01:00
|
|
|
: 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)
|
|
|
|
{
|
2006-11-29 18:56:40 +01:00
|
|
|
gold_assert(local_sym_index != GSYM_CODE
|
|
|
|
&& local_sym_index != CONSTANT_CODE);
|
2006-11-03 19:26:11 +01:00
|
|
|
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.
|
2006-11-29 18:56:40 +01:00
|
|
|
explicit Got_entry(Valtype constant)
|
2006-11-03 19:26:11 +01:00
|
|
|
: local_sym_index_(CONSTANT_CODE)
|
|
|
|
{ this->u_.constant = constant; }
|
|
|
|
|
|
|
|
// Write the GOT entry to an output view.
|
|
|
|
void
|
2006-11-29 18:56:40 +01:00
|
|
|
write(const General_options*, unsigned char* pov) const;
|
2006-11-03 19:26:11 +01:00
|
|
|
|
|
|
|
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_;
|
2006-11-16 01:38:25 +01:00
|
|
|
// For a local symbol, the local symbol index. This is GSYM_CODE
|
|
|
|
// for a global symbol, or CONSTANT_CODE for a constant.
|
2006-11-03 19:26:11 +01:00
|
|
|
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())); }
|
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
// Options.
|
|
|
|
const General_options* options_;
|
2006-11-03 19:26:11 +01:00
|
|
|
// The list of GOT entries.
|
|
|
|
Got_entries entries_;
|
|
|
|
};
|
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
// 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(const Target* target, Stringpool* pool)
|
|
|
|
: Output_section_data(Output_data::default_alignment(target->get_size())),
|
|
|
|
target_(target), 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)); }
|
|
|
|
|
2006-12-01 17:51:25 +01:00
|
|
|
// Add a new dynamic entry with the address of output data.
|
2006-11-29 18:56:40 +01:00
|
|
|
void
|
2006-12-01 17:51:25 +01:00
|
|
|
add_section_address(elfcpp::DT tag, const Output_data* od)
|
|
|
|
{ this->add_entry(Dynamic_entry(tag, od, false)); }
|
2006-11-29 18:56:40 +01:00
|
|
|
|
2006-12-01 17:51:25 +01:00
|
|
|
// Add a new dynamic entry with the size of output data.
|
2006-11-29 18:56:40 +01:00
|
|
|
void
|
2006-12-01 17:51:25 +01:00
|
|
|
add_section_size(elfcpp::DT tag, const Output_data* od)
|
|
|
|
{ this->add_entry(Dynamic_entry(tag, od, true)); }
|
2006-11-29 18:56:40 +01:00
|
|
|
|
|
|
|
// Add a new dynamic entry with the address of a symbol.
|
|
|
|
void
|
2006-12-01 17:51:25 +01:00
|
|
|
add_symbol(elfcpp::DT tag, const Symbol* sym)
|
2006-11-29 18:56:40 +01:00
|
|
|
{ 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))); }
|
|
|
|
|
|
|
|
// Set the final data size.
|
|
|
|
void
|
|
|
|
do_set_address(uint64_t, off_t);
|
|
|
|
|
|
|
|
// Write out the dynamic entries.
|
|
|
|
void
|
|
|
|
do_write(Output_file*);
|
|
|
|
|
2006-12-01 17:51:25 +01:00
|
|
|
protected:
|
|
|
|
// Adjust the output section to set the entry size.
|
|
|
|
void
|
|
|
|
do_adjust_output_section(Output_section*);
|
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
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.
|
2006-12-01 17:51:25 +01:00
|
|
|
Dynamic_entry(elfcpp::DT tag, const Output_data* od, bool section_size)
|
2006-11-29 18:56:40 +01:00
|
|
|
: tag_(tag),
|
|
|
|
classification_(section_size
|
|
|
|
? DYNAMIC_SECTION_SIZE
|
|
|
|
: DYNAMIC_SECTION_ADDRESS)
|
2006-12-01 17:51:25 +01:00
|
|
|
{ this->u_.od = od; }
|
2006-11-29 18:56:40 +01:00
|
|
|
|
|
|
|
// Create an entry with the address of a symbol.
|
2006-12-01 17:51:25 +01:00
|
|
|
Dynamic_entry(elfcpp::DT tag, const Symbol* sym)
|
2006-11-29 18:56:40 +01:00
|
|
|
: 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
|
2006-12-01 01:10:37 +01:00
|
|
|
write(unsigned char* pov, const Stringpool* ACCEPT_SIZE_ENDIAN) const;
|
2006-11-29 18:56:40 +01:00
|
|
|
|
|
|
|
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.
|
2006-12-01 17:51:25 +01:00
|
|
|
const Output_data* od;
|
2006-11-29 18:56:40 +01:00
|
|
|
// For DYNAMIC_SYMBOL.
|
2006-12-01 17:51:25 +01:00
|
|
|
const Symbol* sym;
|
2006-11-29 18:56:40 +01:00
|
|
|
// 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 target.
|
|
|
|
const Target* target_;
|
|
|
|
// The entries.
|
|
|
|
Dynamic_entries entries_;
|
|
|
|
// The pool used for strings.
|
|
|
|
Stringpool* pool_;
|
|
|
|
};
|
|
|
|
|
2006-09-22 00:13:18 +02:00
|
|
|
// 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.
|
|
|
|
|
2006-09-26 23:00:34 +02:00
|
|
|
class Output_section : public Output_data
|
2006-09-22 00:13:18 +02:00
|
|
|
{
|
|
|
|
public:
|
|
|
|
// Create an output section, giving the name, type, and flags.
|
2007-05-16 19:42:48 +02:00
|
|
|
Output_section(const char* name, elfcpp::Elf_Word, elfcpp::Elf_Xword);
|
2006-09-26 23:00:34 +02:00
|
|
|
virtual ~Output_section();
|
2006-09-22 00:13:18 +02:00
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
// Add a new input section SHNDX, named NAME, with header SHDR, from
|
|
|
|
// object OBJECT. Return the offset within the output section.
|
2006-09-22 00:13:18 +02:00
|
|
|
template<int size, bool big_endian>
|
|
|
|
off_t
|
2006-11-06 23:46:08 +01:00
|
|
|
add_input_section(Relobj* object, unsigned int shndx, const char *name,
|
2006-09-22 00:13:18 +02:00
|
|
|
const elfcpp::Shdr<size, big_endian>& shdr);
|
|
|
|
|
2007-05-16 19:42:48 +02:00
|
|
|
// Add generated data POSD to this output section.
|
2006-11-16 01:38:25 +01:00
|
|
|
void
|
2006-11-03 19:26:11 +01:00
|
|
|
add_output_section_data(Output_section_data* posd);
|
|
|
|
|
2006-09-22 00:13:18 +02:00
|
|
|
// Return the section name.
|
|
|
|
const char*
|
|
|
|
name() const
|
|
|
|
{ return this->name_; }
|
|
|
|
|
|
|
|
// Return the section type.
|
|
|
|
elfcpp::Elf_Word
|
|
|
|
type() const
|
|
|
|
{ return this->type_; }
|
|
|
|
|
|
|
|
// Return the section flags.
|
|
|
|
elfcpp::Elf_Xword
|
|
|
|
flags() const
|
|
|
|
{ return this->flags_; }
|
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
// Return the section index in the output file.
|
2006-09-29 21:58:17 +02:00
|
|
|
unsigned int
|
2006-11-03 19:26:11 +01:00
|
|
|
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; }
|
2006-09-29 21:58:17 +02:00
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
// Return the entsize field.
|
|
|
|
uint64_t
|
|
|
|
entsize() const
|
|
|
|
{ return this->entsize_; }
|
|
|
|
|
2006-09-29 21:58:17 +02:00
|
|
|
// Set the entsize field.
|
|
|
|
void
|
2006-12-01 17:51:25 +01:00
|
|
|
set_entsize(uint64_t v);
|
2006-09-29 21:58:17 +02:00
|
|
|
|
2006-12-01 17:51:25 +01:00
|
|
|
// Set the link field to the output section index of a section.
|
|
|
|
void
|
2006-12-06 01:02:36 +01:00
|
|
|
set_link_section(const Output_data* od)
|
2006-12-01 17:51:25 +01:00
|
|
|
{
|
|
|
|
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.
|
2006-09-29 21:58:17 +02:00
|
|
|
void
|
|
|
|
set_link(unsigned int v)
|
2006-12-01 17:51:25 +01:00
|
|
|
{
|
|
|
|
gold_assert(this->link_section_ == NULL
|
|
|
|
&& !this->should_link_to_symtab_
|
|
|
|
&& !this->should_link_to_dynsym_);
|
|
|
|
this->link_ = v;
|
|
|
|
}
|
2006-09-29 21:58:17 +02:00
|
|
|
|
2006-12-01 17:51:25 +01:00
|
|
|
// 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 to the output section index of a section.
|
|
|
|
void
|
2006-12-06 01:02:36 +01:00
|
|
|
set_info_section(const Output_data* od)
|
2006-12-01 17:51:25 +01:00
|
|
|
{
|
|
|
|
gold_assert(this->info_ == 0);
|
|
|
|
this->info_section_ = od;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Set the info field to a constant.
|
2006-09-29 21:58:17 +02:00
|
|
|
void
|
|
|
|
set_info(unsigned int v)
|
2006-12-01 17:51:25 +01:00
|
|
|
{
|
|
|
|
gold_assert(this->info_section_ == NULL);
|
|
|
|
this->info_ = v;
|
|
|
|
}
|
2006-09-29 21:58:17 +02:00
|
|
|
|
|
|
|
// Set the addralign field.
|
|
|
|
void
|
|
|
|
set_addralign(uint64_t v)
|
|
|
|
{ this->addralign_ = v; }
|
|
|
|
|
2006-11-16 01:38:25 +01:00
|
|
|
// 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
|
|
|
|
{
|
2006-11-29 18:56:40 +01:00
|
|
|
gold_assert(this->symtab_index_ != 0);
|
2006-11-16 01:38:25 +01:00
|
|
|
return this->symtab_index_;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Set the symtab index.
|
|
|
|
void
|
|
|
|
set_symtab_index(unsigned int index)
|
|
|
|
{
|
2006-11-29 18:56:40 +01:00
|
|
|
gold_assert(index != 0);
|
2006-11-16 01:38:25 +01:00
|
|
|
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
|
|
|
|
{
|
2006-11-29 18:56:40 +01:00
|
|
|
gold_assert(this->dynsym_index_ != 0);
|
2006-11-16 01:38:25 +01:00
|
|
|
return this->dynsym_index_;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Set the dynsym index.
|
|
|
|
void
|
|
|
|
set_dynsym_index(unsigned int index)
|
|
|
|
{
|
2006-11-29 18:56:40 +01:00
|
|
|
gold_assert(index != 0);
|
2006-11-16 01:38:25 +01:00
|
|
|
this->dynsym_index_ = index;
|
|
|
|
}
|
|
|
|
|
2007-05-16 19:42:48 +02:00
|
|
|
// 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;
|
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
// 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);
|
|
|
|
|
2006-09-26 23:00:34 +02:00
|
|
|
// Write the data to the file. For a typical Output_section, this
|
2006-11-03 19:26:11 +01:00
|
|
|
// 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.
|
2006-11-29 18:56:40 +01:00
|
|
|
void
|
2006-11-03 19:26:11 +01:00
|
|
|
do_write(Output_file*);
|
2006-09-26 23:00:34 +02:00
|
|
|
|
2006-09-28 00:53:42 +02:00
|
|
|
// Return the address alignment--function required by parent class.
|
|
|
|
uint64_t
|
|
|
|
do_addralign() const
|
|
|
|
{ return this->addralign_; }
|
|
|
|
|
|
|
|
// Return whether this is an Output_section.
|
|
|
|
bool
|
|
|
|
do_is_section() const
|
|
|
|
{ return true; }
|
|
|
|
|
2006-09-26 23:00:34 +02:00
|
|
|
// Return whether this is a section of the specified type.
|
|
|
|
bool
|
2006-09-28 00:53:42 +02:00
|
|
|
do_is_section_type(elfcpp::Elf_Word type) const
|
2006-09-26 23:00:34 +02:00
|
|
|
{ return this->type_ == type; }
|
|
|
|
|
|
|
|
// Return whether the specified section flag is set.
|
|
|
|
bool
|
2006-09-28 00:53:42 +02:00
|
|
|
do_is_section_flag_set(elfcpp::Elf_Xword flag) const
|
2006-09-26 23:00:34 +02:00
|
|
|
{ return (this->flags_ & flag) != 0; }
|
|
|
|
|
2006-09-29 21:58:17 +02:00
|
|
|
// Write the section header into *OPHDR.
|
|
|
|
template<int size, bool big_endian>
|
|
|
|
void
|
2006-12-01 17:51:25 +01:00
|
|
|
write_header(const Layout*, const Stringpool*,
|
|
|
|
elfcpp::Shdr_write<size, big_endian>*) const;
|
2006-09-29 21:58:17 +02:00
|
|
|
|
2006-09-22 00:13:18 +02:00
|
|
|
private:
|
2006-11-03 19:26:11 +01:00
|
|
|
// 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()
|
2007-05-16 19:42:48 +02:00
|
|
|
: shndx_(0), p2align_(0)
|
|
|
|
{
|
|
|
|
this->u1_.data_size = 0;
|
|
|
|
this->u2_.object = NULL;
|
|
|
|
}
|
2006-11-03 19:26:11 +01:00
|
|
|
|
2007-05-16 19:42:48 +02:00
|
|
|
// For an ordinary input section.
|
2006-11-06 23:46:08 +01:00
|
|
|
Input_section(Relobj* object, unsigned int shndx, off_t data_size,
|
2006-11-03 19:26:11 +01:00
|
|
|
uint64_t addralign)
|
|
|
|
: shndx_(shndx),
|
2007-05-16 19:42:48 +02:00
|
|
|
p2align_(ffsll(static_cast<long long>(addralign)))
|
2006-11-03 19:26:11 +01:00
|
|
|
{
|
2007-05-16 19:42:48 +02:00
|
|
|
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;
|
2006-11-03 19:26:11 +01:00
|
|
|
}
|
|
|
|
|
2007-05-16 19:42:48 +02:00
|
|
|
// For a non-merge output section.
|
2006-11-03 19:26:11 +01:00
|
|
|
Input_section(Output_section_data* posd)
|
2007-05-16 19:42:48 +02:00
|
|
|
: 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;
|
|
|
|
}
|
2006-11-03 19:26:11 +01:00
|
|
|
|
|
|
|
// The required alignment.
|
|
|
|
uint64_t
|
|
|
|
addralign() const
|
2006-11-29 18:56:40 +01:00
|
|
|
{
|
|
|
|
return (this->p2align_ == 0
|
|
|
|
? 0
|
|
|
|
: static_cast<uint64_t>(1) << (this->p2align_ - 1));
|
|
|
|
}
|
2006-11-03 19:26:11 +01:00
|
|
|
|
|
|
|
// Return the required size.
|
|
|
|
off_t
|
|
|
|
data_size() const;
|
|
|
|
|
2007-05-16 19:42:48 +02:00
|
|
|
// 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);
|
|
|
|
}
|
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
// 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);
|
|
|
|
|
2007-05-16 19:42:48 +02:00
|
|
|
// 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;
|
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
// Write out the data. This does nothing for an input section.
|
|
|
|
void
|
|
|
|
write(Output_file*);
|
|
|
|
|
|
|
|
private:
|
2007-05-16 19:42:48 +02:00
|
|
|
// 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
|
|
|
|
};
|
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
// Whether this is an input section.
|
|
|
|
bool
|
|
|
|
is_input_section() const
|
2007-05-16 19:42:48 +02:00
|
|
|
{
|
|
|
|
return (this->shndx_ != OUTPUT_SECTION_CODE
|
|
|
|
&& this->shndx_ != MERGE_DATA_SECTION_CODE
|
|
|
|
&& this->shndx_ != MERGE_STRING_SECTION_CODE);
|
|
|
|
}
|
2006-11-03 19:26:11 +01:00
|
|
|
|
2007-05-16 19:42:48 +02:00
|
|
|
// 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.
|
2006-11-03 19:26:11 +01:00
|
|
|
unsigned int shndx_;
|
|
|
|
// The required alignment, stored as a power of 2.
|
|
|
|
unsigned int p2align_;
|
|
|
|
union
|
|
|
|
{
|
2007-05-16 19:42:48 +02:00
|
|
|
// 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
|
2006-11-03 19:26:11 +01:00
|
|
|
// input section.
|
2006-11-06 23:46:08 +01:00
|
|
|
Relobj* object;
|
2007-05-16 19:42:48 +02:00
|
|
|
// For OUTPUT_SECTION_CODE or MERGE_DATA_SECTION_CODE or
|
|
|
|
// MERGE_STRING_SECTION_CODE, the data.
|
2006-11-03 19:26:11 +01:00
|
|
|
Output_section_data* posd;
|
2007-05-16 19:42:48 +02:00
|
|
|
} u2_;
|
2006-11-03 19:26:11 +01:00
|
|
|
};
|
|
|
|
|
|
|
|
typedef std::vector<Input_section> Input_section_list;
|
|
|
|
|
2007-05-16 19:42:48 +02:00
|
|
|
// 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);
|
|
|
|
|
2006-09-22 00:13:18 +02:00
|
|
|
// Most of these fields are only valid after layout.
|
|
|
|
|
|
|
|
// The name of the section. This will point into a Stringpool.
|
|
|
|
const char* name_;
|
2006-09-28 00:53:42 +02:00
|
|
|
// The section address is in the parent class.
|
2006-09-22 00:13:18 +02:00
|
|
|
// The section alignment.
|
|
|
|
uint64_t addralign_;
|
|
|
|
// The section entry size.
|
|
|
|
uint64_t entsize_;
|
2006-09-28 00:53:42 +02:00
|
|
|
// The file offset is in the parent class.
|
2006-12-01 17:51:25 +01:00
|
|
|
// Set the section link field to the index of this section.
|
2006-12-06 01:02:36 +01:00
|
|
|
const Output_data* link_section_;
|
2006-12-01 17:51:25 +01:00
|
|
|
// If link_section_ is NULL, this is the link field.
|
2006-09-22 00:13:18 +02:00
|
|
|
unsigned int link_;
|
2006-12-01 17:51:25 +01:00
|
|
|
// Set the section info field to the index of this section.
|
2006-12-06 01:02:36 +01:00
|
|
|
const Output_data* info_section_;
|
2006-12-01 17:51:25 +01:00
|
|
|
// If info_section_ is NULL, this is the section info field.
|
2006-09-22 00:13:18 +02:00
|
|
|
unsigned int info_;
|
|
|
|
// The section type.
|
|
|
|
elfcpp::Elf_Word type_;
|
|
|
|
// The section flags.
|
|
|
|
elfcpp::Elf_Xword flags_;
|
2006-09-29 21:58:17 +02:00
|
|
|
// The section index.
|
2006-11-03 19:26:11 +01:00
|
|
|
unsigned int out_shndx_;
|
2006-11-16 01:38:25 +01:00
|
|
|
// 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_;
|
2006-11-03 19:26:11 +01:00
|
|
|
// 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_;
|
2006-11-16 01:38:25 +01:00
|
|
|
// 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;
|
2006-12-01 17:51:25 +01:00
|
|
|
// 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;
|
2006-09-22 00:13:18 +02:00
|
|
|
};
|
|
|
|
|
|
|
|
// An output segment. PT_LOAD segments are built from collections of
|
|
|
|
// output sections. Other segments typically point within PT_LOAD
|
|
|
|
// segments, and are built directly as needed.
|
|
|
|
|
|
|
|
class Output_segment
|
|
|
|
{
|
|
|
|
public:
|
|
|
|
// Create an output segment, specifying the type and flags.
|
|
|
|
Output_segment(elfcpp::Elf_Word, elfcpp::Elf_Word);
|
|
|
|
|
|
|
|
// Return the virtual address.
|
|
|
|
uint64_t
|
|
|
|
vaddr() const
|
|
|
|
{ return this->vaddr_; }
|
|
|
|
|
|
|
|
// Return the physical address.
|
|
|
|
uint64_t
|
|
|
|
paddr() const
|
|
|
|
{ return this->paddr_; }
|
|
|
|
|
|
|
|
// Return the segment type.
|
|
|
|
elfcpp::Elf_Word
|
|
|
|
type() const
|
|
|
|
{ return this->type_; }
|
|
|
|
|
|
|
|
// Return the segment flags.
|
|
|
|
elfcpp::Elf_Word
|
|
|
|
flags() const
|
|
|
|
{ return this->flags_; }
|
|
|
|
|
2006-10-20 22:40:49 +02:00
|
|
|
// Return the memory size.
|
|
|
|
uint64_t
|
|
|
|
memsz() const
|
|
|
|
{ return this->memsz_; }
|
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
// Return the file size.
|
|
|
|
off_t
|
|
|
|
filesz() const
|
|
|
|
{ return this->filesz_; }
|
|
|
|
|
2006-09-28 00:53:42 +02:00
|
|
|
// Return the maximum alignment of the Output_data.
|
|
|
|
uint64_t
|
2006-11-03 19:26:11 +01:00
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addralign();
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2006-09-28 00:53:42 +02:00
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2006-09-22 00:13:18 +02:00
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// Add an Output_section to this segment.
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void
|
2006-11-14 20:21:05 +01:00
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add_output_section(Output_section* os, elfcpp::Elf_Word seg_flags)
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{ this->add_output_section(os, seg_flags, false); }
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// Add an Output_section to the start of this segment.
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void
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add_initial_output_section(Output_section* os, elfcpp::Elf_Word seg_flags)
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{ this->add_output_section(os, seg_flags, true); }
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2006-09-28 00:53:42 +02:00
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// Add an Output_data (which is not an Output_section) to the start
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// of this segment.
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void
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add_initial_output_data(Output_data*);
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// Set the address of the segment to ADDR and the offset to *POFF
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// (aligned if necessary), and set the addresses and offsets of all
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2006-11-03 19:26:11 +01:00
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// contained output sections accordingly. Set the section indexes
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// of all contained output sections starting with *PSHNDX. Return
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// the address of the immediately following segment. Update *POFF
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// and *PSHNDX. This should only be called for a PT_LOAD segment.
|
2006-09-28 00:53:42 +02:00
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uint64_t
|
2006-11-03 19:26:11 +01:00
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set_section_addresses(uint64_t addr, off_t* poff, unsigned int* pshndx);
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2006-09-28 00:53:42 +02:00
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// Set the offset of this segment based on the section. This should
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// only be called for a non-PT_LOAD segment.
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void
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set_offset();
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// Return the number of output sections.
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unsigned int
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output_section_count() const;
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2006-09-22 00:13:18 +02:00
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2006-09-29 21:58:17 +02:00
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// Write the segment header into *OPHDR.
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template<int size, bool big_endian>
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void
|
2006-11-03 19:26:11 +01:00
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write_header(elfcpp::Phdr_write<size, big_endian>*);
|
2006-09-29 21:58:17 +02:00
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// Write the section headers of associated sections into V.
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template<int size, bool big_endian>
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unsigned char*
|
2006-12-01 17:51:25 +01:00
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write_section_headers(const Layout*, const Stringpool*, unsigned char* v,
|
2006-11-03 19:26:11 +01:00
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unsigned int* pshndx ACCEPT_SIZE_ENDIAN) const;
|
2006-09-29 21:58:17 +02:00
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|
2006-09-22 00:13:18 +02:00
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private:
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Output_segment(const Output_segment&);
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Output_segment& operator=(const Output_segment&);
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|
2006-09-26 23:00:34 +02:00
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|
typedef std::list<Output_data*> Output_data_list;
|
2006-09-22 00:13:18 +02:00
|
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|
2006-11-14 20:21:05 +01:00
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// Add an Output_section to this segment, specifying front or back.
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|
void
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add_output_section(Output_section*, elfcpp::Elf_Word seg_flags,
|
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|
|
bool front);
|
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|
|
|
2006-11-03 19:26:11 +01:00
|
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|
// Find the maximum alignment in an Output_data_list.
|
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|
|
static uint64_t
|
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|
|
maximum_alignment(const Output_data_list*);
|
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|
2006-09-28 00:53:42 +02:00
|
|
|
// Set the section addresses in an Output_data_list.
|
|
|
|
uint64_t
|
2006-11-03 19:26:11 +01:00
|
|
|
set_section_list_addresses(Output_data_list*, uint64_t addr, off_t* poff,
|
|
|
|
unsigned int* pshndx);
|
2006-09-28 00:53:42 +02:00
|
|
|
|
|
|
|
// Return the number of Output_sections in an Output_data_list.
|
|
|
|
unsigned int
|
|
|
|
output_section_count_list(const Output_data_list*) const;
|
|
|
|
|
2006-09-29 21:58:17 +02:00
|
|
|
// Write the section headers in the list into V.
|
|
|
|
template<int size, bool big_endian>
|
|
|
|
unsigned char*
|
2006-12-01 17:51:25 +01:00
|
|
|
write_section_headers_list(const Layout*, const Stringpool*,
|
|
|
|
const Output_data_list*, unsigned char* v,
|
2006-11-03 19:26:11 +01:00
|
|
|
unsigned int* pshdx ACCEPT_SIZE_ENDIAN) const;
|
2006-09-29 21:58:17 +02:00
|
|
|
|
2006-09-28 00:53:42 +02:00
|
|
|
// The list of output data with contents attached to this segment.
|
2006-09-26 23:00:34 +02:00
|
|
|
Output_data_list output_data_;
|
2006-09-28 00:53:42 +02:00
|
|
|
// The list of output data without contents attached to this segment.
|
|
|
|
Output_data_list output_bss_;
|
2006-09-22 00:13:18 +02:00
|
|
|
// The segment virtual address.
|
|
|
|
uint64_t vaddr_;
|
|
|
|
// The segment physical address.
|
|
|
|
uint64_t paddr_;
|
|
|
|
// The size of the segment in memory.
|
|
|
|
uint64_t memsz_;
|
|
|
|
// The segment alignment.
|
|
|
|
uint64_t align_;
|
|
|
|
// The offset of the segment data within the file.
|
|
|
|
off_t offset_;
|
|
|
|
// The size of the segment data in the file.
|
|
|
|
off_t filesz_;
|
|
|
|
// The segment type;
|
|
|
|
elfcpp::Elf_Word type_;
|
|
|
|
// The segment flags.
|
|
|
|
elfcpp::Elf_Word flags_;
|
2006-11-03 19:26:11 +01:00
|
|
|
// Whether we have set align_.
|
|
|
|
bool is_align_known_;
|
2006-09-22 00:13:18 +02:00
|
|
|
};
|
|
|
|
|
2006-09-29 21:58:17 +02:00
|
|
|
// This class represents the output file.
|
2006-09-22 00:13:18 +02:00
|
|
|
|
|
|
|
class Output_file
|
|
|
|
{
|
|
|
|
public:
|
2006-09-29 21:58:17 +02:00
|
|
|
Output_file(const General_options& options);
|
|
|
|
|
|
|
|
// 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.
|
|
|
|
void
|
|
|
|
close();
|
|
|
|
|
|
|
|
// We currently always use mmap which makes the view handling quite
|
|
|
|
// simple. In the future we may support other approaches.
|
2006-09-22 00:13:18 +02:00
|
|
|
|
|
|
|
// Write data to the output file.
|
|
|
|
void
|
2006-09-29 21:58:17 +02:00
|
|
|
write(off_t offset, const void* data, off_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)
|
|
|
|
{
|
2006-11-29 18:56:40 +01:00
|
|
|
gold_assert(start >= 0 && size >= 0 && start + size <= this->file_size_);
|
2006-09-29 21:58:17 +02:00
|
|
|
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*)
|
|
|
|
{ }
|
|
|
|
|
|
|
|
private:
|
|
|
|
// General options.
|
|
|
|
const General_options& options_;
|
|
|
|
// File name.
|
|
|
|
const char* name_;
|
|
|
|
// File descriptor.
|
|
|
|
int o_;
|
|
|
|
// File size.
|
|
|
|
off_t file_size_;
|
|
|
|
// Base of file mapped into memory.
|
|
|
|
unsigned char* base_;
|
2006-09-22 00:13:18 +02:00
|
|
|
};
|
|
|
|
|
|
|
|
} // End namespace gold.
|
|
|
|
|
|
|
|
#endif // !defined(GOLD_OUTPUT_H)
|