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/*

 * ElfFileReader.cpp

 *

 * Copyright 2018 Matthew Ballance

 *

 * Licensed under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in

 * compliance with the License.  You may obtain a copy of

 * the License at

 *

 * http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in

 * writing, software distributed under the License is

 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR

 * CONDITIONS OF ANY KIND, either express or implied.  See

 * the License for the specific language governing

 * permissions and limitations under the License.

 *

 *  Created on: Nov 17, 2018

 *      Author: ballance

 */

#include "ElfFileReader.h"

#include <stdio.h>

#include <elf.h>

ElfFileReader::ElfFileReader() {

        m_fp = 0;

}

ElfFileReader::~ElfFileReader() {

        // TODO Auto-generated destructor stub

}

bool ElfFileReader::read(const std::string &path) {

        Elf32_Phdr phdr;

        Elf32_Shdr shdr;

        m_fp = fopen(path.c_str(), "rb");

        if (!m_fp) {

                fprintf(stdout, "Error: failed to open file %s\n", path.c_str());

                return false;

        }

        fread(&m_hdr, sizeof(Elf32_Ehdr), 1, m_fp);

        for (uint32_t i=0; i<m_hdr.e_shnum; i++) {

                read(m_hdr.e_shoff+m_hdr.e_shentsize*i, &shdr, sizeof(Elf32_Shdr));

                visit_shdr(shdr);

        }

        fclose(m_fp);

        m_fp = 0;

        return true;

}

void ElfFileReader::read(uint32_t off, void *dst, uint32_t sz) {

        fseek(m_fp, off, 0);

        fread(dst, sz, 1, m_fp);

}