Add original unix v6

2018-01-27 22:35:41 +09:00
commit 2c7099ee50
664 changed files with 106254 additions and 0 deletions
@@ -0,0 +1,20 @@
+/ count subroutine calls during profiling
+
+.globl	mcount
+.comm	countbase,2
+
+mcount:
+	mov	(r0),r1
+	bne	1f
+	mov	countbase,r1
+	beq	2f
+	add	$6,countbase
+	mov	(sp),(r1)+
+	mov	r1,(r0)
+1:
+	inc	2(r1)
+	bne	2f
+	inc	(r1)
+2:
+	rts	pc
+