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 +1,43 @@
+/old = sbrk(increment);
+/
+/sbrk gets increment more core, and returns a pointer
+/	to the beginning of the new core area
+/
+.globl	_sbrk,_end, cerror
+
+_sbrk:
+	mov	r5,-(sp)
+	mov	sp,r5
+	mov	nd,0f
+	add	4(r5),0f
+	sys	0; 9f
+	bec	1f
+	jmp	cerror
+1:
+	mov	nd,r0
+	add	4(r5),nd
+	mov	(sp)+,r5
+	rts	pc
+
+.globl	_brk
+/ brk(value)
+/ as described in man2.
+/ returns 0 for ok, -1 for error.
+
+_brk:
+	mov	r5,-(sp)
+	mov	sp,r5
+	mov	4(r5),0f
+	sys	0; 9f
+	bec	1f
+	jmp	cerror
+1:
+	mov	4(r5),nd
+	clr	r0
+	mov	(sp)+,r5
+	rts	pc
+
+.data
+9:
+	sys	break; 0:..
+nd:	_end