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#! /usr/bin/env python3
import sys
from oe.parsers.elf import Elf
def find_program_segment(elf, ph_type):
for h in elf.header.program_headers:
if h.type == ph_type:
return h
return None
def find_section_header(elf, sh_type):
for h in elf.header.section_headers:
if h.type == sh_type:
return h
return None
def stripped(elf):
for h in elf.header.section_headers:
if h.type == Elf.ShType.progbits and h.name == ".debug_info":
return False
return True
def is_dynamic(elf):
return find_program_segment(elf, Elf.PhType.interp) is not None
def dynamic_by_tag(elf, tag):
dynamic = find_section_header(elf, Elf.ShType.dynamic)
if not dynamic:
return None
for entry in dynamic.body.entries:
if entry.tag_enum == tag:
yield entry.value_str
def dynamic_by_tag_first(elf, tag):
values = dynamic_by_tag(elf, tag)
try:
return next(values)
except StopIteration:
return None
def linkage(elf):
dynamic = find_section_header(elf, Elf.ShType.dynsym)
if not dynamic:
return
strings = None
for h in elf.header.section_headers:
if h.type == Elf.ShType.strtab and h.name == ".dynstr":
strings = h
if not strings:
return
for entry in dynamic.dynsym.entries:
elf._io.seek(strings.offset + entry.name_offset)
name = elf._io.read_bytes_term(0, False, True, True).decode(u"ASCII")
print(name)
def main():
with Elf.from_file(sys.argv[1]) as elf:
def print(s):
pass
print("ELF binary, {} {}, for {}".format({Elf.Bits.b32: "32-bit", Elf.Bits.b64: "64-bit"}[elf.bits],
{Elf.Endian.le: "little-endian", Elf.Endian.be: "big-endian"}[elf.endian],
elf.header.machine.name))
print("Stripped" if stripped(elf) else "Not stripped")
print("Dynamically linked" if is_dynamic(elf) else "Statically linked")
print(f"SONAME {dynamic_by_tag_first(elf, Elf.DynamicArrayTags.soname)}")
print(f"RPATH {dynamic_by_tag_first(elf, Elf.DynamicArrayTags.rpath)}")
print(f"RUNPATH {dynamic_by_tag_first(elf, Elf.DynamicArrayTags.runpath)}")
print(f"NEEDED {', '.join(dynamic_by_tag(elf, Elf.DynamicArrayTags.needed))}")
def test():
with Elf.from_file(sys.argv[1]) as elf:
soname = dynamic_by_tag_first(elf, Elf.DynamicArrayTags.soname)
rpath = dynamic_by_tag_first(elf, Elf.DynamicArrayTags.rpath)
runpath = dynamic_by_tag_first(elf, Elf.DynamicArrayTags.runpath)
needed = list(dynamic_by_tag(elf, Elf.DynamicArrayTags.needed))
import timeit
print(timeit.timeit("test()", number=1000, globals=globals()) / 1000)
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