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#------------------------------------------------------------------------------
# elftools tests
#
# Kyle Zeng (zengyhkyle@asu.edu)
# This code is in the public domain
#------------------------------------------------------------------------------
import unittest
import os
from elftools.elf.elffile import ELFFile
from elftools.elf.segments import NoteSegment
class TestCoreNotes(unittest.TestCase):
""" This test makes sure than core dump specific
sections are properly analyzed.
"""
@classmethod
def setUpClass(cls):
cls._core_file = open(os.path.join('test',
'testfiles_for_unittests', 'core_linux32.elf'),
'rb')
def test_core_prpsinfo(self):
elf = ELFFile(self._core_file)
for segment in elf.iter_segments():
if not isinstance(segment, NoteSegment):
continue
notes = list(segment.iter_notes())
for note in segment.iter_notes():
if note['n_type'] != 'NT_PRPSINFO':
continue
desc = note['n_desc']
self.assertEqual(desc['pr_state'], 0)
self.assertEqual(desc['pr_sname'], b'R')
self.assertEqual(desc['pr_zomb'], 0)
self.assertEqual(desc['pr_nice'], 0)
self.assertEqual(desc['pr_flag'], 0x400600)
self.assertEqual(desc['pr_uid'], 1000)
self.assertEqual(desc['pr_gid'], 1000)
self.assertEqual(desc['pr_pid'], 11038)
self.assertEqual(desc['pr_ppid'], 10442)
self.assertEqual(desc['pr_pgrp'], 11038)
self.assertEqual(desc['pr_sid'], 10442)
self.assertEqual(
desc['pr_fname'],
b'coredump\x00\x00\x00\x00\x00\x00\x00\x00')
self.assertEqual(
desc['pr_psargs'],
b'./coredump foo bar 42 '.ljust(80, b'\x00'))
def test_core_nt_file(self):
"""
Test that the parsing of the NT_FILE note within a core file is
correct.
The assertions are made against the output of eu-readelf.
eu-readelf -n core_linux64.elf
...
CORE 0x0000018b NT_FILE (mapped files)
Page size: 4096
Start End Page Offset
0x56624000 0x56625000 0x00000000
/tmp/coredump
0x56625000 0x56626000 0x00000000
/tmp/coredump
0x56626000 0x56627000 0x00000001
/tmp/coredump
0xf7d13000 0xf7ee8000 0x00000000
/lib/i386-linux-gnu/libc-2.27.so
0xf7ee8000 0xf7ee9000 0x000001d5
/lib/i386-linux-gnu/libc-2.27.so
0xf7ee9000 0xf7eeb000 0x000001d5
/lib/i386-linux-gnu/libc-2.27.so
0xf7eeb000 0xf7eec000 0x000001d7
/lib/i386-linux-gnu/libc-2.27.so
0xf7f39000 0xf7f5f000 0x00000000
/lib/i386-linux-gnu/ld-2.27.so
0xf7f5f000 0xf7f60000 0x00000025
/lib/i386-linux-gnu/ld-2.27.so
0xf7f60000 0xf7f61000 0x00000026
/lib/i386-linux-gnu/ld-2.27.so
...
"""
elf = ELFFile(self._core_file)
nt_file_found = False
for segment in elf.iter_segments():
if not isinstance(segment, NoteSegment):
continue
for note in segment.iter_notes():
if note['n_type'] != 'NT_FILE':
continue
nt_file_found = True
desc = note['n_desc']
self.assertEqual(desc['num_map_entries'], 10)
self.assertEqual(desc['page_size'], 4096)
self.assertEqual(len(desc['Elf_Nt_File_Entry']), 10)
self.assertEqual(len(desc['filename']), 10)
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][0],
desc['page_size'],
0x56624000, 0x56625000, 0x00000000)
self.assertEqual(desc['filename'][0],
b"/tmp/coredump")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][1],
desc['page_size'],
0x56625000, 0x56626000, 0x00000000)
self.assertEqual(desc['filename'][1],
b"/tmp/coredump")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][2],
desc['page_size'],
0x56626000, 0x56627000, 0x00000001)
self.assertEqual(desc['filename'][2],
b"/tmp/coredump")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][3],
desc['page_size'],
0xf7d13000, 0xf7ee8000, 0x00000000)
self.assertEqual(desc['filename'][3],
b"/lib/i386-linux-gnu/libc-2.27.so")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][4],
desc['page_size'],
0xf7ee8000, 0xf7ee9000, 0x000001d5)
self.assertEqual(desc['filename'][4],
b"/lib/i386-linux-gnu/libc-2.27.so")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][5],
desc['page_size'],
0xf7ee9000, 0xf7eeb000, 0x000001d5)
self.assertEqual(desc['filename'][5],
b"/lib/i386-linux-gnu/libc-2.27.so")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][6],
desc['page_size'],
0xf7eeb000, 0xf7eec000, 0x000001d7)
self.assertEqual(desc['filename'][6],
b"/lib/i386-linux-gnu/libc-2.27.so")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][7],
desc['page_size'],
0xf7f39000, 0xf7f5f000, 0x00000000)
self.assertEqual(desc['filename'][7],
b"/lib/i386-linux-gnu/ld-2.27.so")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][8],
desc['page_size'],
0xf7f5f000, 0xf7f60000, 0x00000025)
self.assertEqual(desc['filename'][8],
b"/lib/i386-linux-gnu/ld-2.27.so")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][9],
desc['page_size'],
0xf7f60000, 0xf7f61000, 0x00000026)
self.assertEqual(desc['filename'][9],
b"/lib/i386-linux-gnu/ld-2.27.so")
self.assertTrue(nt_file_found)
def validate_nt_file_entry(self,
entry,
page_size,
expected_vm_start,
expected_vm_end,
expected_page_offset):
self.assertEqual(entry.vm_start, expected_vm_start)
self.assertEqual(entry.vm_end, expected_vm_end)
self.assertEqual(entry.page_offset, expected_page_offset)
@classmethod
def tearDownClass(cls):
cls._core_file.close()
|
