2.9BSD - /usr/src/lib/c/sys/ucall.s

   1: /
   2: / ucall -- call a kernel subroutine
   3: / return = ucall(priority, addr, arg1, arg2)
   4: /
   5: 
   6: .globl  _ucall
   7: 
   8: _ucall:
   9:         mov     r5,-(sp)
  10:         mov     sp,r5
  11:         mov     4(r5),0f
  12:         mov     6(r5),0f+2
  13:         mov     10(r5),0f+4
  14:         mov     12(r5),0f+6
  15:         sys     local; 9f
  16:         mov     (sp)+, r5
  17:         rts     pc
  18: .data
  19: 9:
  20:         sys     ucall; 0:..; ..; ..; ..;

Defined functions