diff options
Diffstat (limited to 'libs/elfio/elfio/elfio_section.hpp')
| -rw-r--r-- | libs/elfio/elfio/elfio_section.hpp | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/libs/elfio/elfio/elfio_section.hpp b/libs/elfio/elfio/elfio_section.hpp new file mode 100644 index 0000000..cb188c1 --- /dev/null +++ b/libs/elfio/elfio/elfio_section.hpp @@ -0,0 +1,313 @@ +/* +Copyright (C) 2001-2015 by Serge Lamikhov-Center + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. +*/ + +#ifndef ELFIO_SECTION_HPP +#define ELFIO_SECTION_HPP + +#include <string> +#include <iostream> + +namespace ELFIO { + +class section +{ + friend class elfio; + public: + virtual ~section() {}; + + ELFIO_GET_ACCESS_DECL ( Elf_Half, index ); + ELFIO_GET_SET_ACCESS_DECL( std::string, name ); + ELFIO_GET_SET_ACCESS_DECL( Elf_Word, type ); + ELFIO_GET_SET_ACCESS_DECL( Elf_Xword, flags ); + ELFIO_GET_SET_ACCESS_DECL( Elf_Word, info ); + ELFIO_GET_SET_ACCESS_DECL( Elf_Word, link ); + ELFIO_GET_SET_ACCESS_DECL( Elf_Xword, addr_align ); + ELFIO_GET_SET_ACCESS_DECL( Elf_Xword, entry_size ); + ELFIO_GET_SET_ACCESS_DECL( Elf64_Addr, address ); + ELFIO_GET_SET_ACCESS_DECL( Elf_Xword, size ); + ELFIO_GET_SET_ACCESS_DECL( Elf_Word, name_string_offset ); + ELFIO_GET_ACCESS_DECL ( Elf64_Off, offset ); + size_t stream_size; + size_t get_stream_size() const + { + return stream_size; + } + + void set_stream_size(size_t value) + { + stream_size = value; + } + + virtual const char* get_data() const = 0; + virtual void set_data( const char* pData, Elf_Word size ) = 0; + virtual void set_data( const std::string& data ) = 0; + virtual void append_data( const char* pData, Elf_Word size ) = 0; + virtual void append_data( const std::string& data ) = 0; + + protected: + ELFIO_SET_ACCESS_DECL( Elf64_Off, offset ); + ELFIO_SET_ACCESS_DECL( Elf_Half, index ); + + virtual void load( std::istream& f, + std::streampos header_offset ) = 0; + virtual void save( std::ostream& f, + std::streampos header_offset, + std::streampos data_offset ) = 0; + virtual bool is_address_initialized() const = 0; +}; + + +template< class T > +class section_impl : public section +{ + public: +//------------------------------------------------------------------------------ + section_impl( const endianess_convertor* convertor_ ) : convertor( convertor_ ) + { + std::fill_n( reinterpret_cast<char*>( &header ), sizeof( header ), '\0' ); + is_address_set = false; + data = 0; + data_size = 0; + } + +//------------------------------------------------------------------------------ + ~section_impl() + { + delete [] data; + } + +//------------------------------------------------------------------------------ + // Section info functions + ELFIO_GET_SET_ACCESS( Elf_Word, type, header.sh_type ); + ELFIO_GET_SET_ACCESS( Elf_Xword, flags, header.sh_flags ); + ELFIO_GET_SET_ACCESS( Elf_Xword, size, header.sh_size ); + ELFIO_GET_SET_ACCESS( Elf_Word, link, header.sh_link ); + ELFIO_GET_SET_ACCESS( Elf_Word, info, header.sh_info ); + ELFIO_GET_SET_ACCESS( Elf_Xword, addr_align, header.sh_addralign ); + ELFIO_GET_SET_ACCESS( Elf_Xword, entry_size, header.sh_entsize ); + ELFIO_GET_SET_ACCESS( Elf_Word, name_string_offset, header.sh_name ); + ELFIO_GET_ACCESS ( Elf64_Addr, address, header.sh_addr ); + +//------------------------------------------------------------------------------ + Elf_Half + get_index() const + { + return index; + } + + +//------------------------------------------------------------------------------ + std::string + get_name() const + { + return name; + } + +//------------------------------------------------------------------------------ + void + set_name( std::string name_ ) + { + name = name_; + } + +//------------------------------------------------------------------------------ + void + set_address( Elf64_Addr value ) + { + header.sh_addr = value; + header.sh_addr = (*convertor)( header.sh_addr ); + is_address_set = true; + } + +//------------------------------------------------------------------------------ + bool + is_address_initialized() const + { + return is_address_set; + } + +//------------------------------------------------------------------------------ + const char* + get_data() const + { + return data; + } + +//------------------------------------------------------------------------------ + void + set_data( const char* raw_data, Elf_Word size ) + { + if ( get_type() != SHT_NOBITS ) { + delete [] data; + try { + data = new char[size]; + } catch (const std::bad_alloc&) { + data = 0; + data_size = 0; + size = 0; + } + if ( 0 != data && 0 != raw_data ) { + data_size = size; + std::copy( raw_data, raw_data + size, data ); + } + } + + set_size( size ); + } + +//------------------------------------------------------------------------------ + void + set_data( const std::string& str_data ) + { + return set_data( str_data.c_str(), (Elf_Word)str_data.size() ); + } + +//------------------------------------------------------------------------------ + void + append_data( const char* raw_data, Elf_Word size ) + { + if ( get_type() != SHT_NOBITS ) { + if ( get_size() + size < data_size ) { + std::copy( raw_data, raw_data + size, data + get_size() ); + } + else { + data_size = 2*( data_size + size); + char* new_data; + try { + new_data = new char[data_size]; + } catch (const std::bad_alloc&) { + new_data = 0; + size = 0; + } + if ( 0 != new_data ) { + std::copy( data, data + get_size(), new_data ); + std::copy( raw_data, raw_data + size, new_data + get_size() ); + delete [] data; + data = new_data; + } + } + set_size( get_size() + size ); + } + } + +//------------------------------------------------------------------------------ + void + append_data( const std::string& str_data ) + { + return append_data( str_data.c_str(), (Elf_Word)str_data.size() ); + } + +//------------------------------------------------------------------------------ + protected: +//------------------------------------------------------------------------------ + ELFIO_GET_SET_ACCESS( Elf64_Off, offset, header.sh_offset ); + +//------------------------------------------------------------------------------ + void + set_index( Elf_Half value ) + { + index = value; + } + +//------------------------------------------------------------------------------ + void + load( std::istream& stream, + std::streampos header_offset ) + { + std::fill_n( reinterpret_cast<char*>( &header ), sizeof( header ), '\0' ); + + stream.seekg ( 0, stream.end ); + set_stream_size ( stream.tellg() ); + + stream.seekg( header_offset ); + stream.read( reinterpret_cast<char*>( &header ), sizeof( header ) ); + + + Elf_Xword size = get_size(); + if ( 0 == data && SHT_NULL != get_type() && SHT_NOBITS != get_type() && size < get_stream_size()) { + try { + data = new char[size + 1]; + } catch (const std::bad_alloc&) { + data = 0; + data_size = 0; + } + if ( 0 != size ) { + stream.seekg( (*convertor)( header.sh_offset ) ); + stream.read( data, size ); + data[size] = 0; //ensure data is ended with 0 to avoid oob read + data_size = size; + } + } + } + +//------------------------------------------------------------------------------ + void + save( std::ostream& f, + std::streampos header_offset, + std::streampos data_offset ) + { + if ( 0 != get_index() ) { + header.sh_offset = data_offset; + header.sh_offset = (*convertor)( header.sh_offset ); + } + + save_header( f, header_offset ); + if ( get_type() != SHT_NOBITS && get_type() != SHT_NULL && + get_size() != 0 && data != 0 ) { + save_data( f, data_offset ); + } + } + +//------------------------------------------------------------------------------ + private: +//------------------------------------------------------------------------------ + void + save_header( std::ostream& f, + std::streampos header_offset ) const + { + f.seekp( header_offset ); + f.write( reinterpret_cast<const char*>( &header ), sizeof( header ) ); + } + +//------------------------------------------------------------------------------ + void + save_data( std::ostream& f, + std::streampos data_offset ) const + { + f.seekp( data_offset ); + f.write( get_data(), get_size() ); + } + +//------------------------------------------------------------------------------ + private: + T header; + Elf_Half index; + std::string name; + char* data; + Elf_Word data_size; + const endianess_convertor* convertor; + bool is_address_set; +}; + +} // namespace ELFIO + +#endif // ELFIO_SECTION_HPP |
