V7/usr/src/libc/sys/phys.s

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/ phys -- C library

/	phys(seg, size, physad)

.globl	_phys, cerror

.phys = 52.

_phys:
	mov	r5,-(sp)
	mov	sp,r5
	mov	4(r5),0f
	mov	6(r5),0f+2
	mov	8(r5),0f+4
	sys	0; 9f
	.data
9:
	sys	.phys; 0: ..; ..; ..
	.text
	bec	1f
	jmp	cerror
1:
	mov	(sp)+,r5
	rts	pc