unicorn/tests/regress/emu_clear_errors.py

81 lines
2.9 KiB
Python
Raw Permalink Normal View History

2016-01-11 04:56:34 +00:00
#!/usr/bin/python
from __future__ import print_function
import binascii
import regress
from unicorn import *
from unicorn.x86_const import *
CODE = binascii.unhexlify(b"".join([
b"8B 74 01 28", # mov esi, dword ptr [ecx + eax + 0x28] mapped: 0x1000
b"03 F0", # add esi, eax 0x1004
b"8D 45 FC", # lea eax, dword ptr [ebp - 4] 0x1006
b"50", # push eax 0x1009
b"6A 40", # push 0x40 0x100A
b"6A 10", # push 0x10 0x100C
b"56", # push esi 0x100E
b"FF 15 20 20 00 10" # call some address 0x100F
]).replace(" ", ""))
def showpc(mu):
pc = mu.reg_read(UC_X86_REG_EIP)
print("pc: 0x%x" % (pc))
class HookCodeStopEmuTest(regress.RegressTest):
def test_hook_code_stop_emu(self):
mu = Uc(UC_ARCH_X86, UC_MODE_32)
# base of CODE
mu.mem_map(0x1000, 0x1000)
mu.mem_write(0x1000, CODE)
mu.reg_write(UC_X86_REG_EIP, 0x1000)
# base of STACK
mu.mem_map(0x4000, 0x4000)
mu.mem_write(0x4000, "\x00" * 0x4000)
mu.reg_write(UC_X86_REG_ESP, 0x6000)
mu.reg_write(UC_X86_REG_EBP, 0x6000)
mu.reg_write(UC_X86_REG_ECX, 0x0)
mu.reg_write(UC_X86_REG_EAX, 0x0)
def _hook(_, access, address, length, value, context):
pc = mu.reg_read(UC_X86_REG_EIP)
print("mem unmapped: pc: %x access: %x address: %x length: %x value: %x" % (
pc, access, address, length, value))
mu.emu_stop()
return True
mu.hook_add(UC_HOOK_MEM_UNMAPPED, _hook)
# we only expect the following instruction to execute,
# and it will fail, because it accesses unmapped memory.
# mov esi, dword ptr [ecx + eax + 0x28] mapped: 0x1000
mu.emu_start(0x1000, 0x100F)
showpc(mu)
# now, we want to reuse the emulator, and keep executing
# from the next instruction
mu.reg_write(UC_X86_REG_EIP, 0x1004)
self.assertEqual(0x1004, mu.reg_read(UC_X86_REG_EIP))
# we expect the following instructions to execute
# add esi, eax 0x1004
# lea eax, dword ptr [ebp - 4] 0x1006
# push eax 0x1009
# push 0x40 0x100A
# push 0x10 0x100C
# push esi 0x100E
#
# currently, a UC_ERR_READ_UNMAPPED exception is raised here
mu.emu_start(0x1004, 0x100F)
showpc(mu)
if __name__ == '__main__':
regress.main()