= How to learn
Spin like mad between:
* standards
* high level generators. We use the <assembler (computing)> `as` and <linker (computing)> `ld`.
* hexdumps
* file decompilers. We use `readelf`. It makes it faster to read the ELF file by turning it into human readable output. But you must have seen one byte-by-byte example first, and think how `readelf` output maps to the standard.
* low-level generators: stand-alone libraries that let you control every field of the ELF files you generated. https://github.com/BR903/ELFkickers, https://github.com/sqall01/ZwoELF and many more on GitHub.
* consumer: the `exec` system call of the Linux kernel can parse ELF files to starts processes: https://github.com/torvalds/linux/blob/v4.11/fs/binfmt_elf.c, https://stackoverflow.com/questions/8352535/how-does-kernel-get-an-executable-binary-file-running-under-linux/31394861\#31394861