UNIX 6th Ed. - /usr/source/s5/open.s

   1: / C library -- open
   2: 
   3: / file = open(string, mode)
   4: /
   5: / file == -1 means error
   6: 
   7: .globl  _open, cerror
   8: 
   9: _open:
  10:         mov     r5,-(sp)
  11:         mov     sp,r5
  12:         mov     4(r5),0f
  13:         mov     6(r5),0f+2
  14:         sys     0; 9f
  15:         bec     1f
  16:         jmp     cerror
  17: 1:
  18:         mov     (sp)+,r5
  19:         rts     pc
  20: .data
  21: 9:
  22:         sys     open; 0:..; ..

Defined functions