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+# 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)
+