#!/usr/bin/env python

"""See https://github.com/unicorn-engine/unicorn/issues/82"""

import unicorn
CODE_ADDR = 0x10101000
CODE = b'\xff\xe3'
mu = unicorn.Uc(unicorn.UC_ARCH_X86, unicorn.UC_MODE_32)
mu.mem_map(CODE_ADDR, 1024 * 4)
mu.mem_write(CODE_ADDR, CODE)
mu.reg_write(unicorn.x86_const.UC_X86_REG_EBX, 0x0)

print "jmp ebx, with ebx == 0"
try:
    mu.emu_start(CODE_ADDR, CODE_ADDR + 2, count=1)
except unicorn.UcError as e:
    print "Error: %s" % e

mu = unicorn.Uc(unicorn.UC_ARCH_X86, unicorn.UC_MODE_32)
mu.mem_map(CODE_ADDR, 1024 * 4)
# If we write this address to EBX then the emulator hangs on emu_start
mu.reg_write(unicorn.x86_const.UC_X86_REG_EBX, 0xaa96a47f)
mu.mem_write(CODE_ADDR, CODE)
print "jmp ebx, with ebx == 0xaa96a47f"
try:
    mu.emu_start(CODE_ADDR, CODE_ADDR + 2, count=1)
except unicorn.UcError as e:
    print "Error: %s" % e