path: root/lib/arch/arm/README.md

# Procedure Call Standard ARM64

- Integer/pointer arguments via `r0`-`r3`
- Integer/pointer return values via `r0`
- Callee saved registers `r4`-`r11`, `sp`, `lr`, `fp`

## Reference
- [johannst armv7 notes](https://johannst.github.io/notes/arch/armv7.html)