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/* zenutils - Utilities for working with creative firmwares.
* Copyright 2007 (c) Rasmus Ry <rasmus.ry{at}gmail.com>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef SHARED_PE_H_INCLUDED
#define SHARED_PE_H_INCLUDED
#include <string>
#include <pelib/PeLib.h>
#include <utils.h>
namespace shared {
struct section_info
{
word index;
dword virtual_address;
dword virtual_size;
dword raw_address;
dword raw_size;
dword characteristics;
}; //struct section_info
class pe_file
{
public:
pe_file(PeLib::PeFile* pef = NULL);
~pe_file();
bool is_valid() const;
bool read(const std::string& filename);
bool find_section(const std::string& name, section_info& info) const;
bool add_section(const std::string& name, const bytes& buffer, section_info& info);
dword get_image_base() const;
dword pa_to_va(PeLib::dword pa) const;
protected:
template <int _Bits>
static bool find_section(const PeLib::PeFileT<_Bits>* pef,
const std::string& name, section_info& info);
template <int _Bits>
static bool add_section(PeLib::PeFileT<_Bits>* pef,
const std::string& name, const bytes& buffer,
section_info& info);
private:
PeLib::PeFile* _pef;
}; //class pe_file
template <int _Bits>
bool pe_file::find_section(const PeLib::PeFileT<_Bits>* pef,
const std::string& name, section_info& info)
{
for (PeLib::word i = 0; i < pef->peHeader().getNumberOfSections(); i++)
{
if (pef->peHeader().getSectionName(i) == name)
{
info.index = i;
info.virtual_address = pef->peHeader().getVirtualAddress(i);
info.virtual_size = pef->peHeader().getVirtualSize(i);
info.raw_address = pef->peHeader().getPointerToRawData(i);
info.raw_size = pef->peHeader().getSizeOfRawData(i);
info.characteristics = pef->peHeader().getCharacteristics(i);
return true;
}
}
return false;
}
template <int _Bits>
bool pe_file::add_section(PeLib::PeFileT<_Bits>* pef,
const std::string& name, const bytes& buffer,
section_info& info)
{
using namespace PeLib;
// Check if the last section has the same name as the one being added.
PeLib::word secnum = pef->peHeader().getNumberOfSections();
if (pef->peHeader().getSectionName(secnum-1) == name)
{
// If it is, we change the attributes of the existing section.
secnum = secnum - 1;
pef->peHeader().setSizeOfRawData(secnum,
alignOffset(buffer.size(),
pef->peHeader().getFileAlignment()));
pef->peHeader().setVirtualSize(secnum,
alignOffset(buffer.size(),
pef->peHeader().getSectionAlignment()));
PeLib::dword chars = pef->peHeader().getCharacteristics(secnum-1);
pef->peHeader().setCharacteristics(secnum,
chars | PELIB_IMAGE_SCN_MEM_WRITE | PELIB_IMAGE_SCN_MEM_READ);
}
else
{
// Otherwise we add a new section.
if (pef->peHeader().addSection(name, buffer.size()) != NO_ERROR)
{
return false;
}
pef->peHeader().makeValid(pef->mzHeader().getAddressOfPeHeader());
pef->peHeader().write(pef->getFileName(), pef->mzHeader().getAddressOfPeHeader());
}
// Save the section headers to the file.
if (pef->peHeader().writeSections(pef->getFileName()) != NO_ERROR)
{
return false;
}
// Save the section data to the file.
if (pef->peHeader().writeSectionData(pef->getFileName(), secnum, buffer) != NO_ERROR)
{
return false;
}
// Fill out the section information.
info.index = secnum;
info.virtual_address = pef->peHeader().getVirtualAddress(secnum);
info.virtual_size = pef->peHeader().getVirtualSize(secnum);
info.raw_address = pef->peHeader().getPointerToRawData(secnum);
info.raw_size = pef->peHeader().getSizeOfRawData(secnum);
info.characteristics = pef->peHeader().getCharacteristics(secnum);
return true;
}
}; //namespace shared
#endif //SHARED_PE_H_INCLUDED
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