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Change the data segment alignment for newer Linux kernels

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This commit is contained in:
Serge Lamikhov-Center 2021-03-29 01:22:43 +03:00
parent a01d7285cf
commit 7409369fc0
2 changed files with 11 additions and 10 deletions
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7
elfio/elfio_utils.hpp
View File

@ -23,7 +23,8 @@ THE SOFTWARE.
#ifndef ELFIO_UTILS_HPP
#define ELFIO_UTILS_HPP
#include <iostream>
#include <cstdint>
#include <ostream>
#define ELFIO_GET_ACCESS( TYPE, NAME, FIELD ) \
TYPE get_##NAME() const { return ( *convertor )( FIELD ); }
@ -174,10 +175,10 @@ inline uint32_t elf_hash( const unsigned char* name )
return h;
}
inline std::string to_hex_string( Elf64_Addr value )
inline std::string to_hex_string( uint64_t value )
{
std::string str;
while ( value ) {
auto digit = value & 0xF;
if ( digit < 0xA )

14
examples/writer/writer.cpp
View File

@ -45,7 +45,7 @@ int main( void )
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
'\xB9', '\x00', '\x20', '\x40', '\x00', // mov ecx, msg
'\xBA', '\x0E', '\x00', '\x00', '\x00', // mov edx, 14
'\xCD', '\x80', // int 0x80
'\xB8', '\x01', '\x00', '\x00', '\x00', // mov eax, 1
@ -56,8 +56,8 @@ int main( void )
// 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_virtual_address( 0x00401000 );
text_seg->set_physical_address( 0x00401000 );
text_seg->set_flags( PF_X | PF_R );
text_seg->set_align( 0x1000 );
@ -80,10 +80,10 @@ int main( void )
// 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_virtual_address( 0x00402000 );
data_seg->set_physical_address( 0x00402000 );
data_seg->set_flags( PF_W | PF_R );
data_seg->set_align( 0x10 );
data_seg->set_align( 0x1000 );
// Add code section into program segment
data_seg->add_section_index( data_sec->get_index(),
@ -103,7 +103,7 @@ int main( void )
// In this example, the code starts at the first address of the
// 'text_seg' segment. Therefore, the start address is set
// to be equal to the segment location
writer.set_entry( 0x08048000 );
writer.set_entry( 0x00401000 );
// Create ELF file
writer.save( "hello_x86_64" );