UNIX 7th Ed. - /usr/src/libc/sys/exit.s

   1: / C library -- _exit
   2: 
   3: / _exit(code)
   4: / code is return in r0 to system
   5: / Same as plain exit, for user who want to define their own exit.
   6: 
   7: .globl  __exit
   8: .exit = 1.
   9: 
  10: __exit:
  11:         mov     r5,-(sp)
  12:         mov     sp,r5
  13:         mov     4(r5),r0
  14:         sys     .exit

Defined functions