Adds _initializor to handle entry/exit. 'tests' now exits with 'amount of failed tests' as exit code

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@@ -0,0 +1,30 @@
+%include "src/constants/sizes.asm"
+
+extern	exit
+extern	main
+
+section .text
+	global _start
+	global	stack_is_top
+
+_start:
+	mov	rdi, [rsp]
+	lea	rsi, [rsp + SIZE_QWORD]
+	push	rsp ;Can maybe used as a method to find out if we're at top of the stack
+	push	-1
+
+	call	main
+
+	mov	rdi, rax
+	call	exit
+
+stack_is_top:
+	xor	rax, rax
+	mov	rdi, rsp
+	cmp	rdi, [rsp]
+	je	.yes
+	jmp	.q
+	.yes:
+	inc	al
+	.q:
+	ret