mirror of
https://github.com/serge1/ELFIO.git
synced 2024-12-28 06:15:21 +00:00
87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
#include <elfio/elfio.hpp>
|
|
|
|
using namespace ELFIO;
|
|
|
|
int main( void )
|
|
{
|
|
elfio writer;
|
|
|
|
// You can't proceed without this function call!
|
|
writer.create( ELFCLASS64, ELFDATA2LSB );
|
|
|
|
writer.set_os_abi( ELFOSABI_LINUX );
|
|
writer.set_type( ET_EXEC );
|
|
writer.set_machine( EM_X86_64 );
|
|
|
|
// Create code section
|
|
section* text_sec = writer.sections.add( ".text" );
|
|
text_sec->set_type( SHT_PROGBITS );
|
|
text_sec->set_flags( SHF_ALLOC | SHF_EXECINSTR );
|
|
text_sec->set_addr_align( 0x10 );
|
|
|
|
// Add data into it
|
|
char text[] = {
|
|
'\xB8', '\x04', '\x00', '\x00', '\x00', // mov eax, 4
|
|
'\xBB', '\x01', '\x00', '\x00', '\x00', // mov ebx, 1
|
|
'\xB9', '\x20', '\x80', '\x04', '\x08', // mov ecx, msg
|
|
'\xBA', '\x0E', '\x00', '\x00', '\x00', // mov edx, 14
|
|
'\xCD', '\x80', // int 0x80
|
|
'\xB8', '\x01', '\x00', '\x00', '\x00', // mov eax, 1
|
|
'\xCD', '\x80' // int 0x80
|
|
};
|
|
text_sec->set_data( text, sizeof( text ) );
|
|
|
|
// Create a loadable segment
|
|
segment* text_seg = writer.segments.add();
|
|
text_seg->set_type( PT_LOAD );
|
|
text_seg->set_virtual_address( 0x08048000 );
|
|
text_seg->set_physical_address( 0x08048000 );
|
|
text_seg->set_flags( PF_X | PF_R );
|
|
text_seg->set_align( 0x1000 );
|
|
|
|
// Add code section into program segment
|
|
text_seg->add_section_index( text_sec->get_index(),
|
|
text_sec->get_addr_align() );
|
|
|
|
// Create data section
|
|
section* data_sec = writer.sections.add( ".data" );
|
|
data_sec->set_type( SHT_PROGBITS );
|
|
data_sec->set_flags( SHF_ALLOC | SHF_WRITE );
|
|
data_sec->set_addr_align( 0x4 );
|
|
|
|
char data[] = {
|
|
'\x48', '\x65', '\x6C', '\x6C', '\x6F', // msg: db 'Hello, World!', 10
|
|
'\x2C', '\x20', '\x57', '\x6F', '\x72',
|
|
'\x6C', '\x64', '\x21', '\x0A' };
|
|
data_sec->set_data( data, sizeof( data ) );
|
|
|
|
// Create a read/write segment
|
|
segment* data_seg = writer.segments.add();
|
|
data_seg->set_type( PT_LOAD );
|
|
data_seg->set_virtual_address( 0x08048020 );
|
|
data_seg->set_physical_address( 0x08048020 );
|
|
data_seg->set_flags( PF_W | PF_R );
|
|
data_seg->set_align( 0x10 );
|
|
|
|
// Add code section into program segment
|
|
data_seg->add_section_index( data_sec->get_index(),
|
|
data_sec->get_addr_align() );
|
|
|
|
// Add optional signature for the file producer
|
|
section* note_sec = writer.sections.add( ".note" );
|
|
note_sec->set_type( SHT_NOTE );
|
|
note_sec->set_addr_align( 1 );
|
|
note_section_accessor note_writer( writer, note_sec );
|
|
note_writer.add_note( 0x01, "Created by ELFIO", 0, 0 );
|
|
char descr[6] = { 0x31, 0x32, 0x33, 0x34, 0x35, 0x36 };
|
|
note_writer.add_note( 0x01, "Never easier!", descr, sizeof( descr ) );
|
|
|
|
// Setup entry point
|
|
writer.set_entry( 0x08048000 );
|
|
|
|
// Create ELF file
|
|
writer.save( "hello_x86_64" );
|
|
|
|
return 0;
|
|
}
|