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#!/usr/bin/env python
# Sample code for PPC of Unicorn. Nguyen Anh Quynh <aquynh@gmail.com>
from unicorn import *
from unicorn.ppc_const import *
# code to be emulated
PPC_CODE = b"\x7F\x46\x1A\x14" # add r26, r6, r3
# 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 PPC
def test_ppc():
print("Emulate PPC code")
try:
# Initialize emulator in PPC EB mode
mu = Uc(UC_ARCH_PPC, UC_MODE_PPC32 | 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, PPC_CODE)
# initialize machine registers
mu.reg_write(UC_PPC_REG_3, 0x1234)
mu.reg_write(UC_PPC_REG_6, 0x6789)
mu.reg_write(UC_PPC_REG_26, 0x5555)
# 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(PPC_CODE))
# now print out some registers
print(">>> Emulation done. Below is the CPU context")
r26 = mu.reg_read(UC_PPC_REG_26)
print(">>> r26 = 0x%x" % r26)
except UcError as e:
print("ERROR: %s" % e)
if __name__ == '__main__':
test_ppc()
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