57 lines
1.6 KiB
Python
Executable File
57 lines
1.6 KiB
Python
Executable File
#!/usr/bin/env python
|
|
|
|
# reg_write() can't modify PC from within trace callbacks
|
|
|
|
from __future__ import print_function
|
|
from unicorn import *
|
|
from unicorn.arm_const import *
|
|
|
|
BASE_ADDRESS = 0x10000000
|
|
|
|
# sub sp, #0xc
|
|
THUMB_CODE = "\x83\xb0" * 5
|
|
|
|
# callback for tracing instructions
|
|
def hook_code(uc, address, size, user_data):
|
|
print(">>> Tracing instruction at 0x%x, instruction size = %u" % (address, size))
|
|
mu = user_data
|
|
print(">>> Setting PC to 0xffffffff")
|
|
mu.reg_write(ARM_REG_PC, 0xffffffff)
|
|
|
|
# callback for tracing basic blocks
|
|
def hook_block(uc, address, size, user_data):
|
|
print(">>> Tracing basic block at 0x%x, block size = 0x%x" %(address, size))
|
|
mu = user_data
|
|
print(">>> Setting PC to 0xffffffff")
|
|
mu.reg_write(ARM_REG_PC, 0xffffffff)
|
|
|
|
# set up emulation
|
|
def instruction_trace_test():
|
|
try:
|
|
# initialize emulator in ARM's Thumb mode
|
|
mu = Uc(UC_ARCH_ARM, UC_MODE_THUMB)
|
|
|
|
# map some memory
|
|
mu.mem_map(BASE_ADDRESS, 2 * 1024 * 1024)
|
|
|
|
# write machine code to be emulated to memory
|
|
mu.mem_write(BASE_ADDRESS, THUMB_CODE)
|
|
|
|
# setup stack
|
|
mu.reg_write(ARM_REG_SP, BASE_ADDRESS + 2 * 1024 * 1024)
|
|
|
|
# tracing all instructions with customized callback
|
|
mu.hook_add(UC_HOOK_CODE, hook_code, user_data=mu)
|
|
|
|
# tracing all basic blocks with customized callback
|
|
mu.hook_add(UC_HOOK_BLOCK, hook_block, user_data=mu)
|
|
|
|
# emulate machine code in infinite time
|
|
mu.emu_start(BASE_ADDRESS, BASE_ADDRESS + len(THUMB_CODE))
|
|
|
|
except UcError as e:
|
|
print("ERROR: %s" % e)
|
|
|
|
if __name__ == '__main__':
|
|
instruction_trace_test()
|