def _dump_debug_frames(self):
""" Dump the raw frame information from .debug_frame
"""
if not self._dwarfinfo.has_CFI():
return
self._emitline('Contents of the .debug_frame section:')
for entry in self._dwarfinfo.CFI_entries():
if isinstance(entry, CIE):
self._emitline('\n%08x %08x %08x CIE' % (
entry.offset, entry['length'], entry['CIE_id']))
self._emitline(' Version: %d' % entry['version'])
self._emitline(' Augmentation: "%s"' % bytes2str(entry['augmentation']))
self._emitline(' Code alignment factor: %u' % entry['code_alignment_factor'])
self._emitline(' Data alignment factor: %d' % entry['data_alignment_factor'])
self._emitline(' Return address column: %d' % entry['return_address_register'])
self._emitline()
else: # FDE
self._emitline('\n%08x %08x %08x FDE cie=%08x pc=%08x..%08x' % (
entry.offset,
entry['length'],
entry['CIE_pointer'],
entry.cie.offset,
entry['initial_location'],
entry['initial_location'] + entry['address_range']))
self._emit(describe_CFI_instructions(entry))
self._emitline()
def _dump_debug_frames(self):
""" Dump the raw frame information from .debug_frame
"""
if not self._dwarfinfo.has_CFI():
return
self._emitline('Contents of the .debug_frame section:')
for entry in self._dwarfinfo.CFI_entries():
if isinstance(entry, CIE):
self._emitline(
'\n%08x %08x %08x CIE' %
(entry.offset, entry['length'], entry['CIE_id']))
self._emitline(' Version: %d' %
entry['version'])
self._emitline(' Augmentation: "%s"' %
bytes2str(entry['augmentation']))
self._emitline(' Code alignment factor: %u' %
entry['code_alignment_factor'])
self._emitline(' Data alignment factor: %d' %
entry['data_alignment_factor'])
self._emitline(' Return address column: %d' %
entry['return_address_register'])
self._emitline()
else: # FDE
self._emitline(
'\n%08x %08x %08x FDE cie=%08x pc=%08x..%08x' %
(entry.offset, entry['length'], entry['CIE_pointer'],
entry.cie.offset, entry['initial_location'],
entry['initial_location'] + entry['address_range']))
self._emit(describe_CFI_instructions(entry))
self._emitline()
def test_describe_CFI_instructions(self):
# The data here represents a single CIE
data = (b'' +
b'\x16\x00\x00\x00' + # length
b'\xff\xff\xff\xff' + # CIE_id
b'\x03\x00\x04\x7c' + # version, augmentation, caf, daf
b'\x08' + # return address
b'\x0c\x07\x02' +
b'\x10\x02\x07\x03\x01\x02\x00\x00\x06\x06')
s = BytesIO(data)
structs = DWARFStructs(little_endian=True, dwarf_format=32, address_size=4)
cfi = CallFrameInfo(s, len(data), structs)
entries = cfi.get_entries()
set_global_machine_arch('x86')
self.assertEqual(describe_CFI_instructions(entries[0]),
( ' DW_CFA_def_cfa: r7 (edi) ofs 2\n' +
' DW_CFA_expression: r2 (edx) (DW_OP_addr: 201; DW_OP_deref; DW_OP_deref)\n'))
def test_describe_CFI_instructions(self):
# The data here represents a single CIE
data = (
b'' + b'\x16\x00\x00\x00' + # length
b'\xff\xff\xff\xff' + # CIE_id
b'\x03\x00\x04\x7c' + # version, augmentation, caf, daf
b'\x08' + # return address
b'\x0c\x07\x02' + b'\x10\x02\x07\x03\x01\x02\x00\x00\x06\x06')
s = BytesIO(data)
structs = DWARFStructs(little_endian=True,
dwarf_format=32,
address_size=4)
cfi = CallFrameInfo(s, len(data), structs)
entries = cfi.get_entries()
set_global_machine_arch('x86')
self.assertEqual(describe_CFI_instructions(entries[0]), (
' DW_CFA_def_cfa: r7 (edi) ofs 2\n' +
' DW_CFA_expression: r2 (edx) (DW_OP_addr: 201; DW_OP_deref; DW_OP_deref)\n'
))