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#!/usr/bin/env python
# Sample code for RISCV of Unicorn. Nguyen Anh Quynh <aquynh@gmail.com>
from unicorn import *
from unicorn.riscv_const import *
'''
$ cstool riscv64 1305100093850502
0 13 05 10 00 addi a0, zero, 1
4 93 85 05 02 addi a1, a1, 0x20
'''
RISCV_CODE = b"\x13\x05\x10\x00\x93\x85\x05\x02"
# 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_riscv():
print("Emulate RISCV code")
try:
# Initialize emulator in RISCV32 mode
mu = Uc(UC_ARCH_RISCV, UC_MODE_RISCV32)
# 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, RISCV_CODE)
# initialize machine registers
mu.reg_write(UC_RISCV_REG_A0, 0x1234)
mu.reg_write(UC_RISCV_REG_A1, 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(RISCV_CODE))
# now print out some registers
print(">>> Emulation done. Below is the CPU context")
a0 = mu.reg_read(UC_RISCV_REG_A0)
a1 = mu.reg_read(UC_RISCV_REG_A1)
print(">>> A0 = 0x%x" % a0)
print(">>> A1 = 0x%x" % a1)
except UcError as e:
print("ERROR: %s" % e)
if __name__ == '__main__':
test_riscv()
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