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/*
* Copyright (c) 2011, Chris Johns <chrisj@rtems.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/**
* @file
*
* @ingroup rtems-ld
*
* @brief RTEMS Linker symbols manages the symbols from all the object files.
*
*/
#if !defined (_RLD_SYMBOLS_H_)
#define _RLD_SYMBOLS_H_
#include <iostream>
#include <list>
#include <map>
#include <string>
#include <rld-elf-types.h>
namespace rld
{
/**
* Forward declarations.
*/
namespace files
{
class object;
}
namespace symbols
{
/**
* A symbol.
*/
class symbol
{
public:
/**
* Default constructor. No symbol has been defined.
*/
symbol ();
/**
* Construct an exported symbol with a object file.
*/
symbol (const std::string& name,
rld::files::object& object,
const elf::elf_sym& esym);
/**
* Construct an unresolved symbol with no object file.
*/
symbol (const std::string& name, const elf::elf_sym& esym);
/**
* Construct a linker symbol that is internally created.
*/
symbol (const std::string& name,
const elf::elf_addr value);
/**
* Construct a linker symbol that is internally created.
*/
symbol (const char* name,
rld::elf::elf_addr value = 0);
/**
* The symbol's name.
*/
const std::string& name () const;
/**
* The symbol's demangled name.
*/
const std::string& demangled () const;
/**
* Is the symbol a C++ name ?
*/
bool is_cplusplus () const;
/**
* The symbol's object file name.
*/
rld::files::object* object () const;
/**
* Set the symbol's object file name. Used when resolving unresolved
* symbols.
*/
void set_object (rld::files::object& obj);
/**
* The ELF symbol.
*/
const ::GElf_Sym& esym () const;
/**
* Return the number of references.
*/
int references () const {
return references_;
}
/**
* Return the number of references.
*/
void referenced ();
/**
* Less than operator for the map container.
*/
bool operator< (const symbol& rhs) const;
/**
* Output to the a stream.
*/
void output (std::ostream& out) const;
private:
std::string name_; //< The name of the symbol.
std::string demangled_; //< If a C++ symbol the demangled name.
rld::files::object* object_; //< The object file containing the
// symbol.
::GElf_Sym esym_; //< The ELF symbol.
int references_; //< The number of times if it referenced.
};
/**
* List of symbol references.
*/
typedef std::list < symbol* > list;
/**
* A symbols table is a map container of symbols.
*/
typedef std::map < std::string, symbol > table;
/**
* Given a list of symbols return how many are referenced.
*/
size_t referenced (list& symbols);
/**
* Output the symbol table.
*/
void output (std::ostream& out, const table& symbols);
}
}
/**
* Output stream operator.
*/
static inline std::ostream& operator<< (std::ostream& out, const rld::symbols::symbol& sym) {
sym.output (out);
return out;
}
#endif
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