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/*
* COPYRIGHT (c) 2012-2014 Chris Johns <chrisj@rtems.org>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
/**
* @file
*
* @ingroup rtems_rtl
*
* @brief RTEMS Run-Time Linker Object File Symbol Table.
*/
#if !defined (_RTEMS_RTL_SYM_H_)
#define _RTEMS_RTL_SYM_H_
#include <rtems.h>
#include "rtl-obj-fwd.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/**
* An object file symbol.
*/
typedef struct rtems_rtl_obj_sym_s
{
rtems_chain_node node; /**< The node's link in the chain. */
const char* name; /**< The symbol's name. */
void* value; /**< The value of the symbol. */
uint32_t data; /**< Format specific data. */
} rtems_rtl_obj_sym_t;
/**
* Table of symbols stored in a hash table.
*/
typedef struct rtems_rtl_symbols_s
{
rtems_chain_control* buckets;
size_t nbuckets;
} rtems_rtl_symbols_t;
/**
* Open a symbol table with the specified number of buckets.
*
* @param symbols The symbol table to open.
* @param buckets The number of buckets in the hash table.
* @retval true The symbol is open.
* @retval false The symbol table could not created. The RTL
* error has the error.
*/
bool rtems_rtl_symbol_table_open (rtems_rtl_symbols_t* symbols,
size_t buckets);
/**
* Close the table and erase the hash table.
*
* @param symbols Close the symbol table.
*/
void rtems_rtl_symbol_table_close (rtems_rtl_symbols_t* symbols);
/**
* Add a table of exported symbols to the symbol table.
*
* The export table is a series of symbol records and each record has two
* fields:
*
* 1. label
* 2. address
*
* The 'label' is an ASCIIZ string of variable length. The address is of size
* of an unsigned long for the target running the link editor. The byte order
* is defined by the machine type because the table should be built by the
* target compiler.
*
* The table is terminated with a nul string followed by the bytes 0xDE, 0xAD,
* 0xBE, and 0xEF. This avoids alignments issues.
*
* @param obj The object table the symbols are for.
* @param esyms The exported symbol table.
* @param size The size of the table in bytes.
*/
bool rtems_rtl_symbol_global_add (rtems_rtl_obj_t* obj,
const unsigned char* esyms,
unsigned int size);
/**
* Find a symbol given the symbol label in the global symbol table.
*
* @param name The name as an ASCIIZ string.
* @retval NULL No symbol found.
* @return rtems_rtl_obj_sym_t* Reference to the symbol.
*/
rtems_rtl_obj_sym_t* rtems_rtl_symbol_global_find (const char* name);
/**
* Find a symbol given the symbol label in the local object file.
*
* @param obj The object file to search.
* @param name The name as an ASCIIZ string.
* @retval NULL No symbol found.
* @return rtems_rtl_obj_sym_t* Reference to the symbol.
*/
rtems_rtl_obj_sym_t* rtems_rtl_symbol_obj_find (rtems_rtl_obj_t* obj,
const char* name);
/**
* Add the object file's symbols to the global table.
*
* @param obj The object file the symbols are to be added.
*/
void rtems_rtl_symbol_obj_add (rtems_rtl_obj_t* obj);
/**
* Erase the object file's local symbols.
*
* @param obj The object file the local symbols are to be erased from.
*/
void rtems_rtl_symbol_obj_erase_local (rtems_rtl_obj_t* obj);
/**
* Erase the object file's symbols.
*
* @param obj The object file the symbols are to be erased from.
*/
void rtems_rtl_symbol_obj_erase (rtems_rtl_obj_t* obj);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif
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