Oops, fixed.

Inline assembly (asm!) and freeform assembly (global_asm!) stabilized in Rust 1.59. Those would allow even lower-level printing mechanisms.

For really “cursed” code I’d say making a weird machine would count.

On libc functions yes. Maybe on some from other libs, if they provide man pages.

Terok Nand had better data storage.

Necessary for cryptographic code, where data-dependent branches can create a side-channel which leaks the data.