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Re: Creating a minimal ELF file using poke

From: Jose E. Marchesi
Subject: Re: Creating a minimal ELF file using poke
Date: Sat, 16 Jul 2022 11:14:05 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)

> Hello people!
> I've added a new entry to https://pokology.org/fun-with-elf.html article.
>   `3 Building "Hello, world" from scratch`
> It is based on an interesting blog post: 
> https://kevinboone.me/elfdemo.html?i=1
> The idea here is to create a valid working ELF executable which runs
> on a x86_64 Linux machine.
> The following Poke script will create `fun-with-elf.exe` file in your
> current directory. You can run in after `chmod +x fun-with-elf.exe`.
> I'd be happy to hear your suggestions/reviews/improvements/... :)

Very nice.

> BTW we soon don't need functions like `u32off_as_le_bytes` (when I
> finished the cast from integers/offsets to byte arrays!)

Bravo :)

> save :ios fd
>      :file "fun-with-elf.exe"
>      :from 0#B
>      :size off
>      :append 0
>      ;

The usage of `save' (which is a poke command) in the example makes me
think: we probably should factor out the functionality of the command to
a ios_save function in pickles/ios.pk, much like we did with `dump' and

Otherwise it won't be available to other poke applications.

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