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Add python bindings for reg save/restore

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This commit is contained in:
Andrew Dutcher 2016-09-08 14:40:39 -07:00
parent f2af98942b
commit 885b809004
2 changed files with 76 additions and 0 deletions
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52
bindings/python/sample_x86.py
View file

@ -308,6 +308,56 @@ def test_i386_inout():
print("ERROR: %s" % e)
def test_i386_reg_save():
print("Save/restore registers in opaque blob")
address = 0
code = '\x40' # inc eax
try:
# Initialize emulator
mu = Uc(UC_ARCH_X86, UC_MODE_32)
# map 8KB memory for this emulation
mu.mem_map(address, 8 * 1024, UC_PROT_ALL)
# write machine code to be emulated to memory
mu.mem_write(address, code)
print(">>> set eax to 1")
mu.reg_write(UC_X86_REG_EAX, 1)
print(">>> execute 'inc eax'")
mu.emu_start(address, address+1)
print(">>> save the register state")
saved_regs = mu.save_regs()
print(">>> execute 'inc eax'")
mu.emu_start(address, address+1)
print(">>> assert eax == 3")
assert mu.reg_read(UC_X86_REG_EAX) == 3
print(">>> restore the register state")
mu.restore_regs(saved_regs)
print(">>> assert eax == 2")
assert mu.reg_read(UC_X86_REG_EAX) == 2
print(">>> execute 'inc eax'")
mu.emu_start(address, address+1)
print(">>> assert eax == 3")
assert mu.reg_read(UC_X86_REG_EAX) == 3
print(">>> restore the register state")
mu.restore_regs(saved_regs)
print(">>> assert eax == 2")
assert mu.reg_read(UC_X86_REG_EAX) == 2
except UcError as e:
print("ERROR: %s" % e)
def test_x86_64():
print("Emulate x86_64 code")
try:
@ -479,6 +529,8 @@ if __name__ == '__main__':
print("=" * 20)
test_i386_inout()
print("=" * 20)
test_i386_reg_save()
print("=" * 20)
test_x86_64()
print("=" * 20)
test_x86_64_syscall()

24
bindings/python/unicorn/unicorn.py
View file

@ -127,6 +127,9 @@ _setup_prototype(_uc, "uc_mem_map_ptr", ucerr, uc_engine, ctypes.c_uint64, ctype
_setup_prototype(_uc, "uc_mem_unmap", ucerr, uc_engine, ctypes.c_uint64, ctypes.c_size_t)
_setup_prototype(_uc, "uc_mem_protect", ucerr, uc_engine, ctypes.c_uint64, ctypes.c_size_t, ctypes.c_uint32)
_setup_prototype(_uc, "uc_query", ucerr, uc_engine, ctypes.c_uint32, ctypes.POINTER(ctypes.c_size_t))
_setup_prototype(_uc, "uc_save_regstate", ctypes.c_voidp, uc_engine, ctypes.c_voidp)
_setup_prototype(_uc, "uc_restore_regstate", None, uc_engine, ctypes.c_voidp)
_setup_prototype(_uc, "free", None, ctypes.c_voidp)
# uc_hook_add is special due to variable number of arguments
_uc.uc_hook_add = _uc.uc_hook_add
@ -449,6 +452,27 @@ class Uc(object):
raise UcError(status)
h = 0
def save_regs(self, store=None):
if store is None:
ptr = ctypes.cast(0, ctypes.c_voidp)
return _ActivePointer(_uc.uc_save_regstate(self._uch, ptr))
elif type(store) is _ActivePointer:
_uc.uc_save_regstate(self._uch, store.pointer)
return store
else:
raise TypeError("Bad register store %s" % repr(store))
def restore_regs(self, store):
if type(store) is not _ActivePointer:
raise TYpeError("Bad register store %s" % repr(store))
_uc.uc_restore_regstate(self._uch, store.pointer)
class _ActivePointer(object):
def __init__(self, pointer):
self.pointer = pointer
def __del__(self):
_uc.free(self.pointer)
# print out debugging info
def debug():