mirror of
https://github.com/yuzu-emu/unicorn.git
synced 2024-12-23 16:35:30 +00:00
91 lines
2.9 KiB
Python
Executable file
91 lines
2.9 KiB
Python
Executable file
#!/usr/bin/env python
|
|
|
|
# reg_write() can't modify PC from within trace callbacks
|
|
# issue #210
|
|
|
|
from __future__ import print_function
|
|
from unicorn import *
|
|
from unicorn.arm_const import *
|
|
|
|
import regress
|
|
|
|
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(UC_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(UC_ARM_REG_PC, 0xffffffff)
|
|
|
|
class CallBackPCTest(regress.RegressTest):
|
|
|
|
def test_instruction_trace(self):
|
|
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(UC_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)
|
|
|
|
# emulate one instruction
|
|
mu.emu_start(BASE_ADDRESS, BASE_ADDRESS + len(THUMB_CODE), count=1)
|
|
|
|
# the instruction trace callback set PC to 0xffffffff, so at this
|
|
# point, the PC value should be 0xffffffff.
|
|
pc = mu.reg_read(UC_ARM_REG_PC)
|
|
self.assertEqual(pc, 0xffffffff, "PC not set to 0xffffffff by instruction trace callback")
|
|
|
|
except UcError as e:
|
|
self.assertFalse(0, "ERROR: %s" % e)
|
|
|
|
def test_block_trace(self):
|
|
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(UC_ARM_REG_SP, BASE_ADDRESS + 2 * 1024 * 1024)
|
|
|
|
# trace blocks with customized callback
|
|
mu.hook_add(UC_HOOK_BLOCK, hook_block, user_data=mu)
|
|
|
|
# emulate one instruction
|
|
mu.emu_start(BASE_ADDRESS, BASE_ADDRESS + len(THUMB_CODE), count=1)
|
|
|
|
# the block callback set PC to 0xffffffff, so at this point, the PC
|
|
# value should be 0xffffffff.
|
|
pc = mu.reg_read(UC_ARM_REG_PC)
|
|
self.assertEqual(pc, 0xffffffff, "PC not set to 0xffffffff by block callback")
|
|
|
|
except UcError as e:
|
|
self.assertFalse(0, "ERROR: %s" % e)
|
|
|
|
if __name__ == '__main__':
|
|
regress.main()
|