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/* vim: set sw=4 sts=4 et foldmethod=syntax : */
/*
* Copyright (c) 2007 Tiziano Müller
* Copyright (c) 2007 David Leverton
*
* This file is part of the Paludis package manager. Paludis is free software;
* you can redistribute it and/or modify it under the terms of the GNU General
* Public License version 2, as published by the Free Software Foundation.
*
* Paludis 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 ELF_HH_
#define ELF_HH_
#include "elf_sections.hh"
#include <paludis/util/exception.hh>
#include <paludis/util/private_implementation_pattern.hh>
#include <paludis/util/wrapped_forward_iterator-fwd.hh>
#include <iosfwd>
#include <elf.h>
class InvalidElfFileError :
public paludis::Exception
{
public:
InvalidElfFileError(const InvalidElfFileError &);
InvalidElfFileError() throw ();
};
template <typename ElfType_>
class ElfObject :
private paludis::PrivateImplementationPattern<ElfObject<ElfType_> >
{
using paludis::PrivateImplementationPattern<ElfObject>::_imp;
private:
typename ElfType_::Header _hdr;
public:
static bool is_valid_elf(std::istream & stream);
ElfObject(std::istream & stream);
~ElfObject();
/**
* Returns e_type from the ELF header
*/
unsigned int get_type() const
{
return _hdr.e_type;
}
/**
* Returns e_machine from the ELF header
*/
unsigned int get_arch() const
{
return _hdr.e_machine;
}
/**
* Returns the OS ABI field from the ident field
*/
unsigned char get_os_abi() const
{
return _hdr.e_ident[EI_OSABI];
}
/**
* Returns the OS ABI Version field from the ident field
*/
unsigned char get_os_abi_version() const
{
return _hdr.e_ident[EI_ABIVERSION];
}
/**
* Returns the processor-specific flags
*/
unsigned int get_flags() const
{
return _hdr.e_flags;
}
/**
* Returns whether this ELF file uses big-endian or little-endian
* Please note: If you didn't use is_valid_elf(...) to check whether
* this is an ELF object, this might be wrong
*/
unsigned int is_big_endian() const
{
// We already checked in is_valid_elf_type whether it's valid or not
return (_hdr.e_ident[EI_DATA] == ELFDATA2MSB);
}
unsigned int get_number_of_sections() const
{
return _hdr.e_shnum;
}
struct SectionIteratorTag;
typedef paludis::WrappedForwardIterator<SectionIteratorTag, Section<ElfType_> > SectionIterator;
SectionIterator section_begin() const;
SectionIterator section_end() const;
SectionIterator get_section_by_index(unsigned int index) const;
void resolve_all_strings();
};
#endif /*ELF_HH_*/
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