Apologies if this attaches itself to to my previous post, and for any typos!
Well the story so far:
This is working code and compiles on gcc versions 2.95.3, 4.2.1 and 7.3.0, AMIGA OS 3.0.x inside ADE, OSX 10.14.3 and Linux Mint 19.
I have called it 'obfuscate_asm.c'.
Although jumping INTO main() compiles BUT causes s segmentation fault, jumping OUT if it doesn't.
Just read the code and see the possibilities. Makes me wonder if this is done by commercial coders.
Results; OSX 10.14.3, default bash terminal, gcc 4.2.1.
As you can see by checking the 32 bit jumps, in this case e9 xx xx xx xx you can obfuscate your code by jumping all over the place to non used functions that actually would do something if called, obfuscate() would actually divide two numbers.
So IMHO gcc is not absolutely foolproof.
I have always quoted, even on here, "IF there is a back door I will find it!"
When I am really interested in finding something I will do my best to find it.
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