If you just want to use the standard library stdlib.asm is your main header, include it after your code. You'll also need to include globals.asm in the first line of your main assembly file.

If you are using it as a learning resource have a look at the teaching folder.

If you are intersted in contributing have a look at CONTRIBUTING.md

ABI

Calling Convention

class	registers
n.a.	zr
preserved	sp, r8 - r12
scratch	flags, r1 - r7
arguments	r1 - r5, r6 = stack args, r7 = stack res
result	r1 = low word, r2 = high word
return address	r13

Stack

grows downwards from top of memory arguments are passed in reverse order with the stack so: lowest address = 1st stack arg highest address = last stack arg

Types

String

Strings are stored in memory as null terminated sequences of bytes encoding ascii characters. They should be passed by reference.