2009-03-29 07:30:54 +00:00
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#!/usr/bin/env ruby
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# This file is part of Metasm, the Ruby assembly manipulation suite
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2010-09-09 18:19:35 +00:00
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# Copyright (C) 2006-2009 Yoann GUILLOT
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2009-03-29 07:30:54 +00:00
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#
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# Licence is LGPL, see LICENCE in the top-level directory
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#
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# quick demonstration that the disassembler's backtracker works
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#
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2010-09-09 18:19:35 +00:00
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require 'metasm'
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Metasm.require 'samples/metasm-shell'
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2009-03-29 07:30:54 +00:00
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puts <<EOS.encode.decode
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.base_addr 0
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; compute jump target
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mov ebx, 0x12345678
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mov eax, ((toto + 12) ^ 0x12345678)
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xor eax, ebx
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sub eax, 12
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; jump
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call eax
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; trap
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add eax, 42
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; die, you vile reverser !
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db 0e9h
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; real target
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toto:
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mov eax, 28h
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pop ebx
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ret
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EOS
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