/ error	= read(fildes, buffer, nbytes);
/	  char *buffer;
/	  unsigned nbytes;

.globl	_read
.globl	cerror

_read:
	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:
	mov	(sp)+,r5
	rts	pc
.data
9:
	sys	read; 0:..; ..