V6/usr/source/s5/seek.s

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/ C library -- seek

/ error = seek(file, offset, ptr);

.globl	_seek, cerror

_seek:
	mov	r5,-(sp)
	mov	sp,r5
	mov	4(r5),r0
	mov	6(r5),0f
	mov	8(r5),0f+2
	sys	0; 9f
	bec	1f
	jmp	cerror
1:
	clr	r0
	mov	(sp)+,r5
	rts	pc
.data
9:
	sys	seek; 0:..; ..