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- #!/usr/bin/env python
- # SPDX-License-Identifier: GPL-2.0+
- # Copyright 2019 Google LLC
- # Written by Simon Glass <sjg@chromium.org>
- """Tests for cbfs_util
- These create and read various CBFSs and compare the results with expected
- values and with cbfstool
- """
- from __future__ import print_function
- import io
- import os
- import shutil
- import struct
- import tempfile
- import unittest
- import cbfs_util
- from cbfs_util import CbfsWriter
- import elf
- import test_util
- import tools
- U_BOOT_DATA = b'1234'
- U_BOOT_DTB_DATA = b'udtb'
- COMPRESS_DATA = b'compress xxxxxxxxxxxxxxxxxxxxxx data'
- class TestCbfs(unittest.TestCase):
- """Test of cbfs_util classes"""
- #pylint: disable=W0212
- @classmethod
- def setUpClass(cls):
- # Create a temporary directory for test files
- cls._indir = tempfile.mkdtemp(prefix='cbfs_util.')
- tools.SetInputDirs([cls._indir])
- # Set up some useful data files
- TestCbfs._make_input_file('u-boot.bin', U_BOOT_DATA)
- TestCbfs._make_input_file('u-boot.dtb', U_BOOT_DTB_DATA)
- TestCbfs._make_input_file('compress', COMPRESS_DATA)
- # Set up a temporary output directory, used by the tools library when
- # compressing files
- tools.PrepareOutputDir(None)
- cls.have_cbfstool = True
- try:
- tools.Run('which', 'cbfstool')
- except:
- cls.have_cbfstool = False
- cls.have_lz4 = True
- try:
- tools.Run('lz4', '--no-frame-crc', '-c',
- tools.GetInputFilename('u-boot.bin'), binary=True)
- except:
- cls.have_lz4 = False
- @classmethod
- def tearDownClass(cls):
- """Remove the temporary input directory and its contents"""
- if cls._indir:
- shutil.rmtree(cls._indir)
- cls._indir = None
- tools.FinaliseOutputDir()
- @classmethod
- def _make_input_file(cls, fname, contents):
- """Create a new test input file, creating directories as needed
- Args:
- fname: Filename to create
- contents: File contents to write in to the file
- Returns:
- Full pathname of file created
- """
- pathname = os.path.join(cls._indir, fname)
- tools.WriteFile(pathname, contents)
- return pathname
- def _check_hdr(self, data, size, offset=0, arch=cbfs_util.ARCHITECTURE_X86):
- """Check that the CBFS has the expected header
- Args:
- data: Data to check
- size: Expected ROM size
- offset: Expected offset to first CBFS file
- arch: Expected architecture
- Returns:
- CbfsReader object containing the CBFS
- """
- cbfs = cbfs_util.CbfsReader(data)
- self.assertEqual(cbfs_util.HEADER_MAGIC, cbfs.magic)
- self.assertEqual(cbfs_util.HEADER_VERSION2, cbfs.version)
- self.assertEqual(size, cbfs.rom_size)
- self.assertEqual(0, cbfs.boot_block_size)
- self.assertEqual(cbfs_util.ENTRY_ALIGN, cbfs.align)
- self.assertEqual(offset, cbfs.cbfs_offset)
- self.assertEqual(arch, cbfs.arch)
- return cbfs
- def _check_uboot(self, cbfs, ftype=cbfs_util.TYPE_RAW, offset=0x38,
- data=U_BOOT_DATA, cbfs_offset=None):
- """Check that the U-Boot file is as expected
- Args:
- cbfs: CbfsReader object to check
- ftype: Expected file type
- offset: Expected offset of file
- data: Expected data in file
- cbfs_offset: Expected CBFS offset for file's data
- Returns:
- CbfsFile object containing the file
- """
- self.assertIn('u-boot', cbfs.files)
- cfile = cbfs.files['u-boot']
- self.assertEqual('u-boot', cfile.name)
- self.assertEqual(offset, cfile.offset)
- if cbfs_offset is not None:
- self.assertEqual(cbfs_offset, cfile.cbfs_offset)
- self.assertEqual(data, cfile.data)
- self.assertEqual(ftype, cfile.ftype)
- self.assertEqual(cbfs_util.COMPRESS_NONE, cfile.compress)
- self.assertEqual(len(data), cfile.memlen)
- return cfile
- def _check_dtb(self, cbfs, offset=0x38, data=U_BOOT_DTB_DATA,
- cbfs_offset=None):
- """Check that the U-Boot dtb file is as expected
- Args:
- cbfs: CbfsReader object to check
- offset: Expected offset of file
- data: Expected data in file
- cbfs_offset: Expected CBFS offset for file's data
- """
- self.assertIn('u-boot-dtb', cbfs.files)
- cfile = cbfs.files['u-boot-dtb']
- self.assertEqual('u-boot-dtb', cfile.name)
- self.assertEqual(offset, cfile.offset)
- if cbfs_offset is not None:
- self.assertEqual(cbfs_offset, cfile.cbfs_offset)
- self.assertEqual(U_BOOT_DTB_DATA, cfile.data)
- self.assertEqual(cbfs_util.TYPE_RAW, cfile.ftype)
- self.assertEqual(cbfs_util.COMPRESS_NONE, cfile.compress)
- self.assertEqual(len(U_BOOT_DTB_DATA), cfile.memlen)
- def _check_raw(self, data, size, offset=0, arch=cbfs_util.ARCHITECTURE_X86):
- """Check that two raw files are added as expected
- Args:
- data: Data to check
- size: Expected ROM size
- offset: Expected offset to first CBFS file
- arch: Expected architecture
- """
- cbfs = self._check_hdr(data, size, offset=offset, arch=arch)
- self._check_uboot(cbfs)
- self._check_dtb(cbfs)
- def _get_expected_cbfs(self, size, arch='x86', compress=None, base=None):
- """Get the file created by cbfstool for a particular scenario
- Args:
- size: Size of the CBFS in bytes
- arch: Architecture of the CBFS, as a string
- compress: Compression to use, e.g. cbfs_util.COMPRESS_LZMA
- base: Base address of file, or None to put it anywhere
- Returns:
- Resulting CBFS file, or None if cbfstool is not available
- """
- if not self.have_cbfstool or not self.have_lz4:
- return None
- cbfs_fname = os.path.join(self._indir, 'test.cbfs')
- cbfs_util.cbfstool(cbfs_fname, 'create', '-m', arch, '-s', '%#x' % size)
- if base:
- base = [(1 << 32) - size + b for b in base]
- cbfs_util.cbfstool(cbfs_fname, 'add', '-n', 'u-boot', '-t', 'raw',
- '-c', compress and compress[0] or 'none',
- '-f', tools.GetInputFilename(
- compress and 'compress' or 'u-boot.bin'),
- base=base[0] if base else None)
- cbfs_util.cbfstool(cbfs_fname, 'add', '-n', 'u-boot-dtb', '-t', 'raw',
- '-c', compress and compress[1] or 'none',
- '-f', tools.GetInputFilename(
- compress and 'compress' or 'u-boot.dtb'),
- base=base[1] if base else None)
- return cbfs_fname
- def _compare_expected_cbfs(self, data, cbfstool_fname):
- """Compare against what cbfstool creates
- This compares what binman creates with what cbfstool creates for what
- is proportedly the same thing.
- Args:
- data: CBFS created by binman
- cbfstool_fname: CBFS created by cbfstool
- """
- if not self.have_cbfstool or not self.have_lz4:
- return
- expect = tools.ReadFile(cbfstool_fname)
- if expect != data:
- tools.WriteFile('/tmp/expect', expect)
- tools.WriteFile('/tmp/actual', data)
- print('diff -y <(xxd -g1 /tmp/expect) <(xxd -g1 /tmp/actual) | colordiff')
- self.fail('cbfstool produced a different result')
- def test_cbfs_functions(self):
- """Test global functions of cbfs_util"""
- self.assertEqual(cbfs_util.ARCHITECTURE_X86, cbfs_util.find_arch('x86'))
- self.assertIsNone(cbfs_util.find_arch('bad-arch'))
- self.assertEqual(cbfs_util.COMPRESS_LZMA, cbfs_util.find_compress('lzma'))
- self.assertIsNone(cbfs_util.find_compress('bad-comp'))
- def test_cbfstool_failure(self):
- """Test failure to run cbfstool"""
- if not self.have_cbfstool:
- self.skipTest('No cbfstool available')
- try:
- # In verbose mode this test fails since stderr is not captured. Fix
- # this by turning off verbosity.
- old_verbose = cbfs_util.VERBOSE
- cbfs_util.VERBOSE = False
- with test_util.capture_sys_output() as (_stdout, stderr):
- with self.assertRaises(Exception) as e:
- cbfs_util.cbfstool('missing-file', 'bad-command')
- finally:
- cbfs_util.VERBOSE = old_verbose
- self.assertIn('Unknown command', stderr.getvalue())
- self.assertIn('Failed to run', str(e.exception))
- def test_cbfs_raw(self):
- """Test base handling of a Coreboot Filesystem (CBFS)"""
- size = 0xb0
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', U_BOOT_DATA)
- cbw.add_file_raw('u-boot-dtb', U_BOOT_DTB_DATA)
- data = cbw.get_data()
- self._check_raw(data, size)
- cbfs_fname = self._get_expected_cbfs(size=size)
- self._compare_expected_cbfs(data, cbfs_fname)
- def test_cbfs_invalid_file_type(self):
- """Check handling of an invalid file type when outputiing a CBFS"""
- size = 0xb0
- cbw = CbfsWriter(size)
- cfile = cbw.add_file_raw('u-boot', U_BOOT_DATA)
- # Change the type manually before generating the CBFS, and make sure
- # that the generator complains
- cfile.ftype = 0xff
- with self.assertRaises(ValueError) as e:
- cbw.get_data()
- self.assertIn('Unknown type 0xff when writing', str(e.exception))
- def test_cbfs_invalid_file_type_on_read(self):
- """Check handling of an invalid file type when reading the CBFS"""
- size = 0xb0
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', U_BOOT_DATA)
- data = cbw.get_data()
- # Read in the first file header
- cbr = cbfs_util.CbfsReader(data, read=False)
- with io.BytesIO(data) as fd:
- self.assertTrue(cbr._find_and_read_header(fd, len(data)))
- pos = fd.tell()
- hdr_data = fd.read(cbfs_util.FILE_HEADER_LEN)
- magic, size, ftype, attr, offset = struct.unpack(
- cbfs_util.FILE_HEADER_FORMAT, hdr_data)
- # Create a new CBFS with a change to the file type
- ftype = 0xff
- newdata = data[:pos]
- newdata += struct.pack(cbfs_util.FILE_HEADER_FORMAT, magic, size, ftype,
- attr, offset)
- newdata += data[pos + cbfs_util.FILE_HEADER_LEN:]
- # Read in this CBFS and make sure that the reader complains
- with self.assertRaises(ValueError) as e:
- cbfs_util.CbfsReader(newdata)
- self.assertIn('Unknown type 0xff when reading', str(e.exception))
- def test_cbfs_no_space(self):
- """Check handling of running out of space in the CBFS"""
- size = 0x60
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', U_BOOT_DATA)
- with self.assertRaises(ValueError) as e:
- cbw.get_data()
- self.assertIn('No space for header', str(e.exception))
- def test_cbfs_no_space_skip(self):
- """Check handling of running out of space in CBFS with file header"""
- size = 0x5c
- cbw = CbfsWriter(size, arch=cbfs_util.ARCHITECTURE_PPC64)
- cbw._add_fileheader = True
- cbw.add_file_raw('u-boot', U_BOOT_DATA)
- with self.assertRaises(ValueError) as e:
- cbw.get_data()
- self.assertIn('No space for data before offset', str(e.exception))
- def test_cbfs_no_space_pad(self):
- """Check handling of running out of space in CBFS with file header"""
- size = 0x70
- cbw = CbfsWriter(size)
- cbw._add_fileheader = True
- cbw.add_file_raw('u-boot', U_BOOT_DATA)
- with self.assertRaises(ValueError) as e:
- cbw.get_data()
- self.assertIn('No space for data before pad offset', str(e.exception))
- def test_cbfs_bad_header_ptr(self):
- """Check handling of a bad master-header pointer"""
- size = 0x70
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', U_BOOT_DATA)
- data = cbw.get_data()
- # Add one to the pointer to make it invalid
- newdata = data[:-4] + struct.pack('<I', cbw._header_offset + 1)
- # We should still be able to find the master header by searching
- with test_util.capture_sys_output() as (stdout, _stderr):
- cbfs = cbfs_util.CbfsReader(newdata)
- self.assertIn('Relative offset seems wrong', stdout.getvalue())
- self.assertIn('u-boot', cbfs.files)
- self.assertEqual(size, cbfs.rom_size)
- def test_cbfs_bad_header(self):
- """Check handling of a bad master header"""
- size = 0x70
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', U_BOOT_DATA)
- data = cbw.get_data()
- # Drop most of the header and try reading the modified CBFS
- newdata = data[:cbw._header_offset + 4]
- with test_util.capture_sys_output() as (stdout, _stderr):
- with self.assertRaises(ValueError) as e:
- cbfs_util.CbfsReader(newdata)
- self.assertIn('Relative offset seems wrong', stdout.getvalue())
- self.assertIn('Cannot find master header', str(e.exception))
- def test_cbfs_bad_file_header(self):
- """Check handling of a bad file header"""
- size = 0x70
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', U_BOOT_DATA)
- data = cbw.get_data()
- # Read in the CBFS master header (only), then stop
- cbr = cbfs_util.CbfsReader(data, read=False)
- with io.BytesIO(data) as fd:
- self.assertTrue(cbr._find_and_read_header(fd, len(data)))
- pos = fd.tell()
- # Remove all but 4 bytes of the file headerm and try to read the file
- newdata = data[:pos + 4]
- with test_util.capture_sys_output() as (stdout, _stderr):
- with io.BytesIO(newdata) as fd:
- fd.seek(pos)
- self.assertEqual(False, cbr._read_next_file(fd))
- self.assertIn('File header at 0x0 ran out of data', stdout.getvalue())
- def test_cbfs_bad_file_string(self):
- """Check handling of an incomplete filename string"""
- size = 0x70
- cbw = CbfsWriter(size)
- cbw.add_file_raw('16-characters xx', U_BOOT_DATA)
- data = cbw.get_data()
- # Read in the CBFS master header (only), then stop
- cbr = cbfs_util.CbfsReader(data, read=False)
- with io.BytesIO(data) as fd:
- self.assertTrue(cbr._find_and_read_header(fd, len(data)))
- pos = fd.tell()
- # Create a new CBFS with only the first 16 bytes of the file name, then
- # try to read the file
- newdata = data[:pos + cbfs_util.FILE_HEADER_LEN + 16]
- with test_util.capture_sys_output() as (stdout, _stderr):
- with io.BytesIO(newdata) as fd:
- fd.seek(pos)
- self.assertEqual(False, cbr._read_next_file(fd))
- self.assertIn('String at %#x ran out of data' %
- cbfs_util.FILE_HEADER_LEN, stdout.getvalue())
- def test_cbfs_debug(self):
- """Check debug output"""
- size = 0x70
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', U_BOOT_DATA)
- data = cbw.get_data()
- try:
- cbfs_util.DEBUG = True
- with test_util.capture_sys_output() as (stdout, _stderr):
- cbfs_util.CbfsReader(data)
- self.assertEqual('name u-boot\ndata %s\n' % U_BOOT_DATA,
- stdout.getvalue())
- finally:
- cbfs_util.DEBUG = False
- def test_cbfs_bad_attribute(self):
- """Check handling of bad attribute tag"""
- if not self.have_lz4:
- self.skipTest('lz4 --no-frame-crc not available')
- size = 0x140
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', COMPRESS_DATA, None,
- compress=cbfs_util.COMPRESS_LZ4)
- data = cbw.get_data()
- # Search the CBFS for the expected compression tag
- with io.BytesIO(data) as fd:
- while True:
- pos = fd.tell()
- tag, = struct.unpack('>I', fd.read(4))
- if tag == cbfs_util.FILE_ATTR_TAG_COMPRESSION:
- break
- # Create a new CBFS with the tag changed to something invalid
- newdata = data[:pos] + struct.pack('>I', 0x123) + data[pos + 4:]
- with test_util.capture_sys_output() as (stdout, _stderr):
- cbfs_util.CbfsReader(newdata)
- self.assertEqual('Unknown attribute tag 123\n', stdout.getvalue())
- def test_cbfs_missing_attribute(self):
- """Check handling of an incomplete attribute tag"""
- if not self.have_lz4:
- self.skipTest('lz4 --no-frame-crc not available')
- size = 0x140
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', COMPRESS_DATA, None,
- compress=cbfs_util.COMPRESS_LZ4)
- data = cbw.get_data()
- # Read in the CBFS master header (only), then stop
- cbr = cbfs_util.CbfsReader(data, read=False)
- with io.BytesIO(data) as fd:
- self.assertTrue(cbr._find_and_read_header(fd, len(data)))
- pos = fd.tell()
- # Create a new CBFS with only the first 4 bytes of the compression tag,
- # then try to read the file
- tag_pos = pos + cbfs_util.FILE_HEADER_LEN + cbfs_util.FILENAME_ALIGN
- newdata = data[:tag_pos + 4]
- with test_util.capture_sys_output() as (stdout, _stderr):
- with io.BytesIO(newdata) as fd:
- fd.seek(pos)
- self.assertEqual(False, cbr._read_next_file(fd))
- self.assertIn('Attribute tag at %x ran out of data' % tag_pos,
- stdout.getvalue())
- def test_cbfs_file_master_header(self):
- """Check handling of a file containing a master header"""
- size = 0x100
- cbw = CbfsWriter(size)
- cbw._add_fileheader = True
- cbw.add_file_raw('u-boot', U_BOOT_DATA)
- data = cbw.get_data()
- cbr = cbfs_util.CbfsReader(data)
- self.assertIn('u-boot', cbr.files)
- self.assertEqual(size, cbr.rom_size)
- def test_cbfs_arch(self):
- """Test on non-x86 architecture"""
- size = 0x100
- cbw = CbfsWriter(size, arch=cbfs_util.ARCHITECTURE_PPC64)
- cbw.add_file_raw('u-boot', U_BOOT_DATA)
- cbw.add_file_raw('u-boot-dtb', U_BOOT_DTB_DATA)
- data = cbw.get_data()
- self._check_raw(data, size, offset=0x40,
- arch=cbfs_util.ARCHITECTURE_PPC64)
- # Compare against what cbfstool creates
- cbfs_fname = self._get_expected_cbfs(size=size, arch='ppc64')
- self._compare_expected_cbfs(data, cbfs_fname)
- def test_cbfs_stage(self):
- """Tests handling of a Coreboot Filesystem (CBFS)"""
- if not elf.ELF_TOOLS:
- self.skipTest('Python elftools not available')
- elf_fname = os.path.join(self._indir, 'cbfs-stage.elf')
- elf.MakeElf(elf_fname, U_BOOT_DATA, U_BOOT_DTB_DATA)
- size = 0xb0
- cbw = CbfsWriter(size)
- cbw.add_file_stage('u-boot', tools.ReadFile(elf_fname))
- data = cbw.get_data()
- cbfs = self._check_hdr(data, size)
- load = 0xfef20000
- entry = load + 2
- cfile = self._check_uboot(cbfs, cbfs_util.TYPE_STAGE, offset=0x28,
- data=U_BOOT_DATA + U_BOOT_DTB_DATA)
- self.assertEqual(entry, cfile.entry)
- self.assertEqual(load, cfile.load)
- self.assertEqual(len(U_BOOT_DATA) + len(U_BOOT_DTB_DATA),
- cfile.data_len)
- # Compare against what cbfstool creates
- if self.have_cbfstool:
- cbfs_fname = os.path.join(self._indir, 'test.cbfs')
- cbfs_util.cbfstool(cbfs_fname, 'create', '-m', 'x86', '-s',
- '%#x' % size)
- cbfs_util.cbfstool(cbfs_fname, 'add-stage', '-n', 'u-boot',
- '-f', elf_fname)
- self._compare_expected_cbfs(data, cbfs_fname)
- def test_cbfs_raw_compress(self):
- """Test base handling of compressing raw files"""
- if not self.have_lz4:
- self.skipTest('lz4 --no-frame-crc not available')
- size = 0x140
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', COMPRESS_DATA, None,
- compress=cbfs_util.COMPRESS_LZ4)
- cbw.add_file_raw('u-boot-dtb', COMPRESS_DATA, None,
- compress=cbfs_util.COMPRESS_LZMA)
- data = cbw.get_data()
- cbfs = self._check_hdr(data, size)
- self.assertIn('u-boot', cbfs.files)
- cfile = cbfs.files['u-boot']
- self.assertEqual(cfile.name, 'u-boot')
- self.assertEqual(cfile.offset, 56)
- self.assertEqual(cfile.data, COMPRESS_DATA)
- self.assertEqual(cfile.ftype, cbfs_util.TYPE_RAW)
- self.assertEqual(cfile.compress, cbfs_util.COMPRESS_LZ4)
- self.assertEqual(cfile.memlen, len(COMPRESS_DATA))
- self.assertIn('u-boot-dtb', cbfs.files)
- cfile = cbfs.files['u-boot-dtb']
- self.assertEqual(cfile.name, 'u-boot-dtb')
- self.assertEqual(cfile.offset, 56)
- self.assertEqual(cfile.data, COMPRESS_DATA)
- self.assertEqual(cfile.ftype, cbfs_util.TYPE_RAW)
- self.assertEqual(cfile.compress, cbfs_util.COMPRESS_LZMA)
- self.assertEqual(cfile.memlen, len(COMPRESS_DATA))
- cbfs_fname = self._get_expected_cbfs(size=size, compress=['lz4', 'lzma'])
- self._compare_expected_cbfs(data, cbfs_fname)
- def test_cbfs_raw_space(self):
- """Test files with unused space in the CBFS"""
- size = 0xf0
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', U_BOOT_DATA)
- cbw.add_file_raw('u-boot-dtb', U_BOOT_DTB_DATA)
- data = cbw.get_data()
- self._check_raw(data, size)
- cbfs_fname = self._get_expected_cbfs(size=size)
- self._compare_expected_cbfs(data, cbfs_fname)
- def test_cbfs_offset(self):
- """Test a CBFS with files at particular offsets"""
- size = 0x200
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', U_BOOT_DATA, 0x40)
- cbw.add_file_raw('u-boot-dtb', U_BOOT_DTB_DATA, 0x140)
- data = cbw.get_data()
- cbfs = self._check_hdr(data, size)
- self._check_uboot(cbfs, ftype=cbfs_util.TYPE_RAW, offset=0x40,
- cbfs_offset=0x40)
- self._check_dtb(cbfs, offset=0x40, cbfs_offset=0x140)
- cbfs_fname = self._get_expected_cbfs(size=size, base=(0x40, 0x140))
- self._compare_expected_cbfs(data, cbfs_fname)
- def test_cbfs_invalid_file_type_header(self):
- """Check handling of an invalid file type when outputting a header"""
- size = 0xb0
- cbw = CbfsWriter(size)
- cfile = cbw.add_file_raw('u-boot', U_BOOT_DATA, 0)
- # Change the type manually before generating the CBFS, and make sure
- # that the generator complains
- cfile.ftype = 0xff
- with self.assertRaises(ValueError) as e:
- cbw.get_data()
- self.assertIn('Unknown file type 0xff', str(e.exception))
- def test_cbfs_offset_conflict(self):
- """Test a CBFS with files that want to overlap"""
- size = 0x200
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', U_BOOT_DATA, 0x40)
- cbw.add_file_raw('u-boot-dtb', U_BOOT_DTB_DATA, 0x80)
- with self.assertRaises(ValueError) as e:
- cbw.get_data()
- self.assertIn('No space for data before pad offset', str(e.exception))
- def test_cbfs_check_offset(self):
- """Test that we can discover the offset of a file after writing it"""
- size = 0xb0
- cbw = CbfsWriter(size)
- cbw.add_file_raw('u-boot', U_BOOT_DATA)
- cbw.add_file_raw('u-boot-dtb', U_BOOT_DTB_DATA)
- data = cbw.get_data()
- cbfs = cbfs_util.CbfsReader(data)
- self.assertEqual(0x38, cbfs.files['u-boot'].cbfs_offset)
- self.assertEqual(0x78, cbfs.files['u-boot-dtb'].cbfs_offset)
- if __name__ == '__main__':
- unittest.main()
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