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#!/usr/bin/env python
# Sample code for S390x of Unicorn.
from unicorn import *
from unicorn.s390x_const import *
# lr %r2, %r3
S390X_CODE = b"\x18\x23"
# 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 RISCV
def test_s390x():
print("Emulate S390X code")
try:
# Initialize emulator in big endian mode
mu = Uc(UC_ARCH_S390X, 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, S390X_CODE)
# initialize machine registers
mu.reg_write(UC_S390X_REG_R3, 0x7890)
# 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(S390X_CODE))
# now print out some registers
print(">>> Emulation done. Below is the CPU context")
r2 = mu.reg_read(UC_S390X_REG_R2)
r3 = mu.reg_read(UC_S390X_REG_R3)
print(">>> R2 = 0x%x" % r2)
print(">>> R3 = 0x%x" % r3)
except UcError as e:
print("ERROR: %s" % e)
if __name__ == '__main__':
test_s390x()
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