| #------------------------------------------------------------------------------- |
| # elftools example: elf_relocations.py |
| # |
| # An example of obtaining a relocation section from an ELF file and examining |
| # the relocation entries it contains. |
| # |
| # Eli Bendersky (eliben@gmail.com) |
| # This code is in the public domain |
| #------------------------------------------------------------------------------- |
| from __future__ import print_function |
| import sys |
| |
| # If elftools is not installed, maybe we're running from the root or examples |
| # dir of the source distribution |
| try: |
| import elftools |
| except ImportError: |
| sys.path.extend(['.', '..']) |
| |
| from elftools.common.py3compat import bytes2str |
| from elftools.elf.elffile import ELFFile |
| from elftools.elf.relocation import RelocationSection |
| |
| |
| def process_file(filename): |
| print('Processing file:', filename) |
| with open(filename, 'rb') as f: |
| elffile = ELFFile(f) |
| |
| # Read the .rela.dyn section from the file, by explicitly asking |
| # ELFFile for this section |
| # Recall that section names are bytes objects |
| reladyn_name = b'.rela.dyn' |
| reladyn = elffile.get_section_by_name(reladyn_name) |
| |
| if not isinstance(reladyn, RelocationSection): |
| print(' The file has no %s section' % bytes2str(reladyn_name)) |
| |
| print(' %s section with %s relocations' % ( |
| bytes2str(reladyn_name), reladyn.num_relocations())) |
| |
| for reloc in reladyn.iter_relocations(): |
| print(' Relocation (%s)' % 'RELA' if reloc.is_RELA() else 'REL') |
| # Relocation entry attributes are available through item lookup |
| print(' offset = %s' % reloc['r_offset']) |
| |
| |
| if __name__ == '__main__': |
| for filename in sys.argv[1:]: |
| process_file(filename) |
| |