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Asked: 2026-05-26T22:19:18+00:00

as part of a homework assignment for my security class, I’m supposed to add

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as part of a homework assignment for my security class, I’m supposed to “add a simple function which prints “Hello, World!” to a compiled C Linux binary”. The binary provided is just a compiled main function with 10 NOPs in it.

Normally, I would have written the code needed into the NOP section directly, but we were explicitly told to add a new function to the program.

I have no idea how to do that. I tried putting some code at the end of the binary, but this seems to destroy it. Could somebody clear this up for me?

EDIT: This question sounds somewhat similar.

EDIT 2: Searching for “ELF injection” yields many interesting results.

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1 Answer

  1. Editorial Team

    Perhaps you need to learn more about ELF (espacially if you want to make a program able to “infect” any Linux binary, not just the simple one you’ve got).

    The Linux ABI X86-64 supplement could also be useful, and also the Linux Assembly Howto

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