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import unittest
from focaccia.arch import x86
from focaccia.snapshot import ProgramState, RegisterAccessError
class TestProgramState(unittest.TestCase):
def setUp(self):
self.arch = x86.ArchX86()
def test_register_access_empty_state(self):
state = ProgramState(self.arch)
for reg in x86.regnames:
self.assertRaises(RegisterAccessError, state.read_register, reg)
def test_register_read_write(self):
state = ProgramState(self.arch)
for reg in x86.regnames:
state.set_register(reg, 0x42)
for reg in x86.regnames:
val = state.read_register(reg)
self.assertEqual(val, 0x42)
def test_register_aliases_empty_state(self):
state = ProgramState(self.arch)
for reg in self.arch.all_regnames:
self.assertRaises(RegisterAccessError, state.read_register, reg)
def test_register_aliases_read_write(self):
state = ProgramState(self.arch)
for reg in ['EAX', 'EBX', 'ECX', 'EDX']:
state.set_register(reg, 0xa0ff0)
for reg in ['AH', 'BH', 'CH', 'DH']:
self.assertEqual(state.read_register(reg), 0xf, reg)
for reg in ['AL', 'BL', 'CL', 'DL']:
self.assertEqual(state.read_register(reg), 0xf0, reg)
for reg in ['AX', 'BX', 'CX', 'DX']:
self.assertEqual(state.read_register(reg), 0x0ff0, reg)
for reg in ['EAX', 'EBX', 'ECX', 'EDX',
'RAX', 'RBX', 'RCX', 'RDX']:
self.assertEqual(state.read_register(reg), 0xa0ff0, reg)
def test_flag_aliases(self):
flags = ['CF', 'PF', 'AF', 'ZF', 'SF', 'TF', 'IF', 'DF', 'OF',
'IOPL', 'NT', 'RF', 'VM', 'AC', 'VIF', 'VIP', 'ID']
state = ProgramState(self.arch)
state.set_register('RFLAGS', 0)
for flag in flags:
self.assertEqual(state.read_register(flag), 0)
state.set_register('RFLAGS',
x86.compose_rflags({'ZF': 1, 'PF': 1, 'OF': 0}))
self.assertEqual(state.read_register('ZF'), 1, self.arch.get_reg_accessor('ZF'))
self.assertEqual(state.read_register('PF'), 1)
self.assertEqual(state.read_register('OF'), 0)
self.assertEqual(state.read_register('AF'), 0)
self.assertEqual(state.read_register('ID'), 0)
self.assertEqual(state.read_register('SF'), 0)
for flag in flags:
state.set_register(flag, 1)
for flag in flags:
self.assertEqual(state.read_register(flag), 1)
state.set_register('OF', 1)
state.set_register('AF', 1)
state.set_register('SF', 1)
self.assertEqual(state.read_register('OF'), 1)
self.assertEqual(state.read_register('AF'), 1)
self.assertEqual(state.read_register('SF'), 1)
if __name__ == '__main__':
unittest.main()
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