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from unicorn import * | |
from unicorn.x86_const import * | |
import struct | |
def read(name): | |
with open(name) as f: | |
return f.read() | |
def u32(data): #zamien ciag 4 bajtow na liczbe w formacie little-endian | |
return struct.unpack("I", data)[0] | |
def p32(num): #zamien liczbe w formacie little-endian na ciag 4 bajtow | |
return struct.pack("I", num) | |
BASE = 0x0000000000400000 | |
STACK_ADDR = 0x0 | |
STACK_SIZE = 1024*1024 | |
mu = Uc (UC_ARCH_X86, UC_MODE_64) | |
mu.mem_map(BASE, 1024*1024) | |
mu.mem_map(STACK_ADDR, STACK_SIZE) | |
mu.mem_write(BASE, read("./fibonacci")) | |
mu.reg_write(UC_X86_REG_RSP, STACK_ADDR + STACK_SIZE - 1) | |
skip = [0x00000000004004EF, 0x00000000004004F6, 0x0000000000400502, 0x000000000040054F] | |
FIBONACCI_ENTRY = 0x0000000000400670 | |
FIBONACCI_END = [0x00000000004006F1, 0x0000000000400709] | |
stack = [] | |
d = {} | |
def hook_code(uc, address, size, user_data): | |
#print('>>> Tracing instruction at 0x%x, instruction size = 0x%x' %(address, size)) | |
if address in skip: | |
mu.reg_write(UC_X86_REG_RIP, address+size) | |
elif address == 0x400560: | |
c = mu.reg_read(UC_X86_REG_RDI) | |
print(chr(c)) | |
mu.reg_write(UC_X86_REG_RIP, address+size) | |
elif address == FIBONACCI_ENTRY: | |
arg0 = mu.reg_read(UC_X86_REG_RDI) | |
r_rsi = mu.reg_read(UC_X86_REG_RSI) | |
arg1 = u32(mu.mem_read(r_rsi, 4)) | |
elif address in FIBONACCI_END: | |
pass | |
mu.hook_add(UC_HOOK_CODE, hook_code) | |
mu.emu_start(0x00000000004004E0, 0x0000000000400575) |
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