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#!/usr/bin/env python
# Sample code for MIPS of Unicorn. Nguyen Anh Quynh <aquynh@gmail.com>
# Python sample ported by Loi Anh Tuan <loianhtuan@gmail.com>
from unicorn import *
from unicorn.mips_const import *
# code to be emulated
MIPS_CODE_EB = b"\x34\x21\x34\x56" # ori $at, $at, 0x3456;
MIPS_CODE_EL = b"\x56\x34\x21\x34" # ori $at, $at, 0x3456;
# memory address where emulation starts
ADDRESS = 0x10000
# 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))
# callback for tracing instructions
def hook_code(uc, address, size, user_data):
print(">>> Tracing instruction at 0x%x, instruction size = 0x%x" % (address, size))
# Test MIPS EB
def test_mips_eb():
print("Emulate MIPS code (big-endian)")
try:
# Initialize emulator in MIPS32 + EB mode
mu = Uc(UC_ARCH_MIPS, UC_MODE_MIPS32 + UC_MODE_BIG_ENDIAN)
# map 2MB memory for this emulation
mu.mem_map(ADDRESS, 2 * 1024 * 1024)
# write machine code to be emulated to memory
mu.mem_write(ADDRESS, MIPS_CODE_EB)
# initialize machine registers
mu.reg_write(UC_MIPS_REG_1, 0x6789)
# tracing all basic blocks with customized callback
mu.hook_add(UC_HOOK_BLOCK, hook_block)
# tracing all instructions with customized callback
mu.hook_add(UC_HOOK_CODE, hook_code)
# emulate machine code in infinite time
mu.emu_start(ADDRESS, ADDRESS + len(MIPS_CODE_EB))
# now print out some registers
print(">>> Emulation done. Below is the CPU context")
r1 = mu.reg_read(UC_MIPS_REG_1)
print(">>> R1 = 0x%x" % r1)
except UcError as e:
print("ERROR: %s" % e)
# Test MIPS EL
def test_mips_el():
print("Emulate MIPS code (little-endian)")
try:
# Initialize emulator in MIPS32 + EL mode
mu = Uc(UC_ARCH_MIPS, UC_MODE_MIPS32 + UC_MODE_LITTLE_ENDIAN)
# map 2MB memory for this emulation
mu.mem_map(ADDRESS, 2 * 1024 * 1024)
# write machine code to be emulated to memory
mu.mem_write(ADDRESS, MIPS_CODE_EL)
# initialize machine registers
mu.reg_write(UC_MIPS_REG_1, 0x6789)
# tracing all basic blocks with customized callback
mu.hook_add(UC_HOOK_BLOCK, hook_block)
# tracing all instructions with customized callback
mu.hook_add(UC_HOOK_CODE, hook_code)
# emulate machine code in infinite time
mu.emu_start(ADDRESS, ADDRESS + len(MIPS_CODE_EL))
# now print out some registers
print(">>> Emulation done. Below is the CPU context")
r1 = mu.reg_read(UC_MIPS_REG_1)
print(">>> R1 = 0x%x" % r1)
except UcError as e:
print("ERROR: %s" % e)
if __name__ == '__main__':
test_mips_eb()
print("=" * 27)
test_mips_el()
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