38 lines
1.1 KiB
Python
Executable File
38 lines
1.1 KiB
Python
Executable File
#!/usr/bin/env python
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"""See https://github.com/unicorn-engine/unicorn/issues/82"""
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import unicorn
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CODE_ADDR = 0x10101000
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CODE = b'\xff\xe3' # jmp ebx
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mu = unicorn.Uc(unicorn.UC_ARCH_X86, unicorn.UC_MODE_32)
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mu.mem_map(CODE_ADDR, 1024 * 4)
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mu.mem_write(CODE_ADDR, CODE)
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# If EBX is zero then an exception is raised, as expected
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mu.reg_write(unicorn.x86_const.UC_X86_REG_EBX, 0x0)
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print(">>> jmp ebx (ebx = 0)");
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try:
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mu.emu_start(CODE_ADDR, CODE_ADDR + 2, count=1)
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except unicorn.UcError as e:
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print("ERROR: %s" % e)
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assert(e.errno == unicorn.UC_ERR_CODE_INVALID)
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else:
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assert(False)
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print(">>> jmp ebx (ebx = 0xaa96a47f)");
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mu = unicorn.Uc(unicorn.UC_ARCH_X86, unicorn.UC_MODE_32)
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mu.mem_map(CODE_ADDR, 1024 * 4)
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# If we write this address to EBX then the emulator hangs on emu_start
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mu.reg_write(unicorn.x86_const.UC_X86_REG_EBX, 0xaa96a47f)
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mu.mem_write(CODE_ADDR, CODE)
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try:
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mu.emu_start(CODE_ADDR, CODE_ADDR + 2, count=1)
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except unicorn.UcError as e:
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print("ERROR: %s" % e)
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assert(e.errno == unicorn.UC_ERR_CODE_INVALID)
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else:
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assert(False)
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print "Success"
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