2.9BSD - /usr/src/lib/jobs/read.s

   1: /*	@(#)read.s	2.2	SCCS id keyword	*/
   2: / C library -- read
   3: 
   4: / nread = read(file, buffer, count);
   5: / nread ==0 means eof; nread == -1 means error
   6: 
   7: .globl  _read
   8: .globl  cerror
   9: 
  10: _read:
  11:         mov     r5,-(sp)
  12:         mov     sp,r5
  13:         mov     4(r5),r0
  14:         mov     8(r5),-(sp)
  15:         mov     6(r5),-(sp)
  16:         sys     read+200
  17:         bec     1f
  18:         cmp     (sp)+, (sp)+
  19:         jmp     cerror
  20: 1:
  21:         cmp     (sp)+, (sp)+
  22:         mov     (sp)+,r5
  23:         rts     pc

Defined functions