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POHow to convert an ELF executable to C code? The generated C code need not be human-readable
 

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  1. POHow to convert an ELF executable to C code? The generated C code need not be human-readable
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    <p>I have an ELF file that I would like to decompile into <code>C</code> code, and make simple changes to the resulting <code>C</code> code and rebuild it into an ELF.</p> <p>The decompiled <code>C</code> code need not be fully human readable. Eg, if variables and function names come out obfuscated, it is okay.</p> <p>Which tools can I use to accomplish this on Linux?</p> <p>PS: If decompiling to <code>C</code> is not possible or is not easy, I'm willing to consider decompiling to assembly language, though tweaking the assembly source will be very difficult for me.</p> <p><strong>UPDATE:</strong> You may assume that I'm using the following <code>C</code> program to get my <code>a.out</code> ELF. Now, assume further that I've lost this original <code>C</code> source. So, I would now like to decompile it to (a possibly obfuscated) <code>C</code> source in which I'm at least able to change small things like the strings <code>"world"</code>, <code>"Hello"</code>, and <code>"Bye"</code>, or be able to reverse the sense of the <code>if</code> statement, etc.</p> <pre><code>#include &lt;stdio.h&gt; #include &lt;string.h&gt; char buf[256]; const char *Hello = "Hello"; const char *Bye = "Bye"; const char *Who = "world"; char * greet(const char *greeting, const char *str) { strcpy(buf, greeting); strcat(buf, ", "); strcat(buf, str); strcat(buf, "!"); return buf; } int main(int argc, char *argv[]) { int sayHello = 0; if(sayHello) { printf("%s\n", greet(Hello, Who)); } else { printf("%s\n", greet(Bye, Who)); } return 0; } </code></pre>
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    1. USHarry
    1. USHarry
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      1. POHow to convert an ELF executable to C code? The generated C code need not be human-readable
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      1. VTDownMod
    1. COYou cannot do that. It is impossible. an optimized ELF image has lost information w.r.t. the original C source.
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      1. POHow to convert an ELF executable to C code? The generated C code need not be human-readable
      1. USBasile Starynkevitch
    2. COWhat is your ELF file and how did you get it?
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      1. POHow to convert an ELF executable to C code? The generated C code need not be human-readable
      1. USBasile Starynkevitch
    3. COPlease see the **Update** above.
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      1. POHow to convert an ELF executable to C code? The generated C code need not be human-readable
      1. USHarry
 

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