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 +1,27 @@
+/ C library -- wait
+
+/ pid = wait();
+/   or,
+/ pid = wait(&status);
+/
+/ pid == -1 if error
+/ status indicates fate of process, if given
+
+.globl	_wait, _nargs, cerror
+
+_wait:
+	mov	r5,-(sp)
+	mov	sp,r5
+	jsr	pc,_nargs
+	mov	r0,-(sp)
+	sys	wait
+	bec	1f
+	tst	(sp)+
+	jmp	cerror
+1:
+	tst	(sp)+
+	beq	2f
+	mov	r1,*4(r5)	/ status return
+2:
+	mov	(sp)+,r5
+	rts	pc