/* Chrysalide - Outil d'analyse de fichiers binaires
 * dwarf-int.c - structures internes du format DWARF
 *
 * Copyright (C) 2015 Cyrille Bagard
 *
 *  This file is part of Chrysalide.
 *
 *  OpenIDA 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.
 *
 *  OpenIDA 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 Foobar.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "dwarf-int.h"



/******************************************************************************
*                                                                             *
*  Paramètres  : format = informations chargées à consulter.                  *
*                pos    = position de début de lecture. [OUT]                 *
*                endian = boutisme reconnu dans le format.                    *
*                header = en-tête à déterminer. [OUT]                         *
*                                                                             *
*  Description : Procède à la lecture de l'en-tête d'un contenu binaire ELF.  *
*                                                                             *
*  Retour      : Bilan de l'opération.                                        *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

bool read_dwarf_section_header(GBinContent *content, vmpa2t *pos, SourceEndian endian, dw_section_header *header)
{
    bool result;                            /* Bilan à retourner           */
    uint32_t first;                         /* Premier paquet d'octets     */
    bool status;                            /* Bilan d'opération           */

    result = false;

    status = g_binary_content_read_u32(content, pos, endian, &first);
    if (!status) goto rdsh_exit;

    if (first >= 0xfffffff0 && first != 0xffffffff)
        goto rdsh_exit;

    if (first == 0xffffffff)
    {
        result = g_binary_content_read_u64(content, pos, endian, &header->unit_length);
        header->is_32b = false;
    }
    else
    {
        result = true;
        header->unit_length = first;
        header->is_32b = true;
    }

    result &= g_binary_content_read_u16(content, pos, endian, &header->version);

 rdsh_exit:

    return result;

}