Author: Uri Blass
Date: 12:38:39 01/28/06
Go up one level in this thread
On January 28, 2006 at 15:28:39, Arnon Yogev wrote: >On January 28, 2006 at 15:08:31, Uri Blass wrote: > >>On January 28, 2006 at 14:51:12, Sebastian Leibnitz wrote: >> >>>On January 28, 2006 at 14:37:14, Uri Blass wrote: >>> >>>>On January 28, 2006 at 13:27:25, Arnon Yogev wrote: >>>> >>>>> >>>>>Ofcourse it is possible to use dissassemblers to rebuild some of the code from >>>>>the .exe file, >>>>>but they were talking about _Automatic_ ways to do it. >>>>>this is impossible. >>>>>on the other points I completely agree with you. >>>>> >>>>>Arnon. >>>> >>>>please see the following post: >>>> >>>>http://www.talkchess.com/forums/1/message.html?481685 >>>> >>>>I understand that it is possible not only to disassemble code but to get >>>>directly C code and not assembler code. >>> >>>That is the difference between a dissasembler and a decompiler. >>> >>>Decompilers have come a long way, but (Arnon is right there), you dont get an >>>automatic full C-source-code. >>> >>>That said, you do get C code, but is quite mutilated and especially most data >>>(prefilled arrays, etc) is difficult to extract. >>> >>>But, as said in my previous post, it enables you to do several things. >>> >>>1) check on algorithms >> easy >>>2) check on data >> depends, sometimes very easy(constants, hardcoded >>>bitboards), sometimes difficult(e.g. piece square tables) >>>3) rebuild the program (more or less the same, although the code might look >>>fairly different) >> difficult (most likely more than a month for a skilled and >>>determined individual) >> >>I do not understand. >> >>I understood from the post in the previous link that you can get C code for the >>exe file when the only difference is that you have not significant names of >>functions and have not significant name of variables. >> >>If it is not the case then what is the C code that you easily get by the >>decompiler? >> > >Uri, if it was possible to do so easily you would see hundreds of clones for >whatever programs out there, you would not see competition at all, and you would >basiclly make programming uselss. >this is simply irrational. I see nothing irrational in the possibility that you can get easily source code. The exe file contain instruction to the computer what to do. What is irrational in the thought that there may be a program that translate the instuctions to C code? Saying that something is possible does not mean that people know about it so if people still do not know that it is possible to do it then you still do not see clones for commercial programs. I understood from the previous discussion that it is possible to get the source of every exe file in C except names of variables and names of functions that are going to be different. Maybe I understood wrong and I never tried to do it for exe files. Uri
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