Add atexit functions for glibc exploits

[RocketMaDev]

This PR closes #2633 and #2673, which try to implement glibc exit hacks. Now user can construct struct exit_function or unserialize bytes to struct exit_function via pwntools.

More information at the issue and PR mentioned above.

[peace-maker]

This looks nice, thank you! It's also nice to see newer Python language features making their appearance with the match-case and type hints. Now that we fully bumped to Python 3.10, we can fully embrace it. It still feels weird to add code like this though Python 2.7 flashbacks

Can you post an exploit using this feature too please? I haven't gotten around to use it in a toy program yet.

[RocketMaDev]

Can you post an exploit using this feature too please? I haven't gotten around to use it in a toy program yet.

I just saw these features from some random repos I looked at days ago, and learn them via official Python docs.

[RocketMaDev]

Why the hyperlink is not rendered correctly?

[peace-maker]

https://www.sphinx-doc.org/en/master/usage/restructuredtext/basics.html#external-links

Maybe put the link and text on the same line?

.. _here: https://elixir.bootlin.com/glibc/glibc-2.43/source/stdlib/exit.h#L25-L32

[peace-maker]

Can you post an exploit using this feature too please? I haven't gotten around to use it in a toy program yet.

I just saw these features from some random repos I looked at days ago, and learn them via official Python docs.

I was talking about the ExitFuncList and ExitFunc classes. Seeing them in action in an exploit we could put into the examples. 😅

[RocketMaDev]

sphinx-doc.org/en/master/usage/restructuredtext/basics.html#external-links

Maybe put the link and text on the same line?

.. _here: https://elixir.bootlin.com/glibc/glibc-2.43/source/stdlib/exit.h#L25-L32

It seems that your link is broken in the generated docs...

https://docs.pwntools.com/en/dev/libc/glibc.html#pwnlib.libc.glibc.protect_ptr

[RocketMaDev]

I was talking about the ExitFuncList and ExitFunc classes. Seeing them in action in an exploit we could put into the examples. 😅

May I not write an example? The symbols are all buried in glibc, it's hard to write a generic example without many hacks... 🤔