Everything about elf
Welcome back to the eighteenth and final part of "Making our own executable packer".
In the last article, we had
a lot of fun. We already had a "packer" executable,
minipak, which joined
stage1 (a launcher), and a compressed version of whichever executable
we wanted to pack.
In the last article, we
did foundational work on
minipak, our ELF packer.
It is now able to receive command-line arguments, environment variables, and
auxiliary vectors. It can parse those command-line arguments into a set of
options. It can make an ELF file smaller using the LZ4 compression
algorithm, and pack
it together with
stage1, our launcher.
And we're back!
In the last article, we thanked our old code and bade it adieu, for it did not spark joy. And then we made a new, solid foundation, on which we planned to actually make an executable packer.
You're still here! Fantastic.
I have good news, and bad news. The good news is, we're actually going to make an executable packer now!
Good morning, and welcome back to "how many executables can we run with our custom dynamic loader before things get really out of control".