2.9BSD - /usr/src/ucb/pascal/px/wait.s

   1: / C library -- wait
   2: 
   3: / pid = wait(&status);
   4: /
   5: / pid == -1 if error
   6: / status indicates fate of process
   7: 
   8: .globl  _wait, cerror
   9: 
  10: _wait:
  11:         mov     r5,-(sp)
  12:         mov     sp,r5
  13:         sys     wait
  14:         bec     1f
  15:         jmp     cerror
  16: 1:
  17:         mov     r1,*4(r5)       / status return
  18:         mov     (sp)+,r5
  19:         rts     pc

Defined functions