/* Chrysalide - Outil d'analyse de fichiers binaires
 * d_dwarf.c - support du format DWARF
 *
 * Copyright (C) 2008-2017 Cyrille Bagard
 *
 *  This file is part of Chrysalide.
 *
 *  Chrysalide is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Chrysalide is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Chrysalide.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "d_dwarf.h"


#include <malloc.h>


#include "abbrev.h"
#include "dwarf-int.h"
#include "info.h"







/******************************************************************************
*                                                                             *
*  Paramètres  : content  = contenu binaire à parcourir.                      *
*                length   = taille du contenu en question.                    *
*                e_format = gestionnaire global (partie exécutable).          *
*                                                                             *
*  Description : Prend en charge un nouveau DWARF.                            *
*                                                                             *
*  Retour      : Adresse de la structure mise en place ou NULL en cas d'échec.*
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

dwarf_format *load_dwarf(const uint8_t *content, off_t length, exe_format *e_format)
{
    dwarf_format *result;                   /* Structure à retourner       */
    bool test;                              /* Bilan d'une initialisation  */

    result = (dwarf_format *)calloc(1, sizeof(dwarf_format));

    DBG_FORMAT(result)->content = content;
    DBG_FORMAT(result)->length = length;

    DBG_FORMAT(result)->e_format = e_format;

    result->format = DWF_32_BITS;

    test = load_dwarf_abbreviations(result);

    test = load_dwarf_information(result);


    return result;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : format   = informations chargées à consulter.                *
*                comments = liste des commentaires à insérer. [OUT]           *
*                offsets  = liste des indices des commentaires. [OUT]         *
*                                                                             *
*  Description : Récupère tous les commentaires à insérer dans le code.       *
*                                                                             *
*  Retour      : Nombre d'éléments mis en place.                              *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

size_t get_dwarf_comments(const dwarf_format *format, const char ***comments, uint64_t **offsets)
{
    size_t result;                          /* Quantité à retourner        */
    size_t i;                               /* Boucle de parcours          */

    result = format->dbg_fc_count;

    if (result > 0)
    {
        *comments = (char **)calloc(result, sizeof(char *));
        *offsets = (uint64_t *)calloc(result, sizeof(uint64_t));

        for (i = 0; i < result; i++)
        {
            (*comments)[i] = format->dbg_functions[i]->prototype;
            (*offsets)[i] = format->dbg_functions[i]->low_pc;
        }

    }

    return result;

}