37 lines
1.0 KiB
Ruby
37 lines
1.0 KiB
Ruby
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# This file is part of Metasm, the Ruby assembly manipulation suite
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# Copyright (C) 2006-2009 Yoann GUILLOT
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#
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# Licence is LGPL, see LICENCE in the top-level directory
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# metasm dasm plugin: scan the memory for a 'ret' which could indicate the beginning of the current function
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# (x86 only)
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def scanfuncstart(addr)
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if o = (1..16).find { |off| @decoded[addr-off].kind_of? DecodedInstruction } and @decoded[addr-o].bin_length == o
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addr -= o
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end
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if @decoded[addr].kind_of? DecodedInstruction
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fs = find_function_start(addr)
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return fs if fs != addr
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end
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edata, s_name = get_section_at(addr)
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if o = (1..1000).find { |off|
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@decoded[addr-off-1] or
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edata.data[edata.ptr-off-1] == ?\xcc or
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edata.data[edata.ptr-off-1] == ?\xc3 or
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edata.data[edata.ptr-off-3] == ?\xc2
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}
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o -= @decoded[addr-o-1].bin_length-1 if @decoded[addr-o-1].kind_of? DecodedInstruction
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addr-o
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end
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end
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if gui
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gui.keyboard_callback_ctrl[?P] = lambda {
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if o = scanfuncstart(gui.curaddr)
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gui.focus_addr(o)
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end
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true
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}
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end
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