mirror of
https://github.com/yuzu-emu/unicorn.git
synced 2024-12-23 18:45:27 +00:00
81 lines
2.9 KiB
Python
Executable file
81 lines
2.9 KiB
Python
Executable file
#!/usr/bin/python
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from __future__ import print_function
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import binascii
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import regress
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from unicorn import *
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from unicorn.x86_const import *
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CODE = binascii.unhexlify(b"".join([
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b"8B 74 01 28", # mov esi, dword ptr [ecx + eax + 0x28] mapped: 0x1000
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b"03 F0", # add esi, eax 0x1004
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b"8D 45 FC", # lea eax, dword ptr [ebp - 4] 0x1006
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b"50", # push eax 0x1009
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b"6A 40", # push 0x40 0x100A
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b"6A 10", # push 0x10 0x100C
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b"56", # push esi 0x100E
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b"FF 15 20 20 00 10" # call some address 0x100F
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]).replace(" ", ""))
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def showpc(mu):
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pc = mu.reg_read(UC_X86_REG_EIP)
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print("pc: 0x%x" % (pc))
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class HookCodeStopEmuTest(regress.RegressTest):
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def test_hook_code_stop_emu(self):
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mu = Uc(UC_ARCH_X86, UC_MODE_32)
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# base of CODE
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mu.mem_map(0x1000, 0x1000)
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mu.mem_write(0x1000, CODE)
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mu.reg_write(UC_X86_REG_EIP, 0x1000)
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# base of STACK
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mu.mem_map(0x4000, 0x4000)
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mu.mem_write(0x4000, "\x00" * 0x4000)
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mu.reg_write(UC_X86_REG_ESP, 0x6000)
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mu.reg_write(UC_X86_REG_EBP, 0x6000)
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mu.reg_write(UC_X86_REG_ECX, 0x0)
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mu.reg_write(UC_X86_REG_EAX, 0x0)
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def _hook(_, access, address, length, value, context):
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pc = mu.reg_read(UC_X86_REG_EIP)
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print("mem unmapped: pc: %x access: %x address: %x length: %x value: %x" % (
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pc, access, address, length, value))
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mu.emu_stop()
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return True
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mu.hook_add(UC_HOOK_MEM_UNMAPPED, _hook)
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# we only expect the following instruction to execute,
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# and it will fail, because it accesses unmapped memory.
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# mov esi, dword ptr [ecx + eax + 0x28] mapped: 0x1000
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mu.emu_start(0x1000, 0x100F)
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showpc(mu)
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# now, we want to reuse the emulator, and keep executing
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# from the next instruction
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mu.reg_write(UC_X86_REG_EIP, 0x1004)
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self.assertEqual(0x1004, mu.reg_read(UC_X86_REG_EIP))
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# we expect the following instructions to execute
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# add esi, eax 0x1004
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# lea eax, dword ptr [ebp - 4] 0x1006
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# push eax 0x1009
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# push 0x40 0x100A
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# push 0x10 0x100C
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# push esi 0x100E
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#
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# currently, a UC_ERR_READ_UNMAPPED exception is raised here
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mu.emu_start(0x1004, 0x100F)
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showpc(mu)
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if __name__ == '__main__':
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regress.main()
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