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#-------------------------------------------------------------------------------
# elftools: elf/notes.py
#
# ELF notes
#
# Eli Bendersky (eliben@gmail.com)
# This code is in the public domain
#-------------------------------------------------------------------------------
from ..common.py3compat import bytes2str
from ..common.utils import struct_parse, roundup
from ..construct import CString
def iter_notes(elffile, offset, size):
""" Yield all the notes in a section or segment.
"""
end = offset + size
while offset < end:
note = struct_parse(
elffile.structs.Elf_Nhdr,
elffile.stream,
stream_pos=offset)
note['n_offset'] = offset
offset += elffile.structs.Elf_Nhdr.sizeof()
elffile.stream.seek(offset)
# n_namesz is 4-byte aligned.
disk_namesz = roundup(note['n_namesz'], 2)
note['n_name'] = bytes2str(
CString('').parse(elffile.stream.read(disk_namesz)))
offset += disk_namesz
desc_data = bytes2str(elffile.stream.read(note['n_descsz']))
if note['n_type'] == 'NT_GNU_ABI_TAG':
note['n_desc'] = struct_parse(elffile.structs.Elf_Nhdr_abi,
elffile.stream,
offset)
elif note['n_type'] == 'NT_GNU_BUILD_ID':
note['n_desc'] = ''.join('%.2x' % ord(b) for b in desc_data)
else:
note['n_desc'] = desc_data
offset += roundup(note['n_descsz'], 2)
note['n_size'] = offset - note['n_offset']
yield note
|
