114 lines
3.2 KiB
C++
114 lines
3.2 KiB
C++
// dynobj.h -- dynamic object support for gold -*- C++ -*-
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#ifndef GOLD_DYNOBJ_H
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#define GOLD_DYNOBJ_H
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#include <vector>
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#include "object.h"
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namespace gold
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{
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// A dynamic object (ET_DYN). This is an abstract base class itself.
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// The implementations is the template class Sized_dynobj.
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class Dynobj : public Object
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{
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public:
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Dynobj(const std::string& name, Input_file* input_file, off_t offset = 0)
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: Object(name, input_file, true, offset)
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{ }
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};
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// A dynamic object, size and endian specific version.
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template<int size, bool big_endian>
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class Sized_dynobj : public Dynobj
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{
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public:
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Sized_dynobj(const std::string& name, Input_file* input_file, off_t offset,
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const typename elfcpp::Ehdr<size, big_endian>&);
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// Set up the object file based on the ELF header.
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void
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setup(const typename elfcpp::Ehdr<size, big_endian>&);
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// Read the symbols.
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void
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do_read_symbols(Read_symbols_data*);
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// Lay out the input sections.
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void
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do_layout(const General_options&, Symbol_table*, Layout*,
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Read_symbols_data*);
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// Add the symbols to the symbol table.
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void
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do_add_symbols(Symbol_table*, Read_symbols_data*);
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// Get the name of a section.
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std::string
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do_section_name(unsigned int shndx)
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{ return this->elf_file_.section_name(shndx); }
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// Return a view of the contents of a section. Set *PLEN to the
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// size.
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Object::Location
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do_section_contents(unsigned int shndx)
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{ return this->elf_file_.section_contents(shndx); }
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private:
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// For convenience.
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typedef Sized_dynobj<size, big_endian> This;
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static const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
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static const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
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static const int dyn_size = elfcpp::Elf_sizes<size>::dyn_size;
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typedef elfcpp::Shdr<size, big_endian> Shdr;
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typedef elfcpp::Dyn<size, big_endian> Dyn;
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// Find the dynamic symbol table and the version sections, given the
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// section headers.
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void
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find_dynsym_sections(const unsigned char* pshdrs,
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unsigned int* pdynshm_shndx,
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unsigned int* pversym_shndx,
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unsigned int* pverdef_shndx,
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unsigned int* pverneed_shndx,
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unsigned int* pdynamic_shndx);
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// Read the dynamic symbol section SHNDX.
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void
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read_dynsym_section(const unsigned char* pshdrs, unsigned int shndx,
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elfcpp::SHT type, unsigned int link,
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File_view** view, off_t* view_size,
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unsigned int* view_info);
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// Set the SONAME from the SHT_DYNAMIC section at DYNAMIC_SHNDX.
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// The STRTAB parameters may have the relevant string table.
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void
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set_soname(const unsigned char* pshdrs, unsigned int dynamic_shndx,
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unsigned int strtab_shndx, const unsigned char* strtabu,
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off_t strtab_size);
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// Mapping from version number to version name.
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typedef std::vector<const char*> Version_map;
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// Create the version map.
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void
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make_version_map(Read_symbols_data* sd, Version_map*) const;
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// Add an entry to the version map.
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void
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set_version_map(Version_map*, unsigned int ndx, const char* name) const;
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// General access to the ELF file.
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elfcpp::Elf_file<size, big_endian, Object> elf_file_;
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// The DT_SONAME name, if any.
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std::string soname_;
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};
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} // End namespace gold.
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#endif // !defined(GOLD_DYNOBJ_H)
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