UNIX 7th Ed. - /usr/src/libc/v6/syscall.s

   1: / syscall
   2: 
   3: .globl  _syscall,csv,cret,cerror
   4: _syscall:
   5:         jsr     r5,csv
   6:         mov     r5,r2
   7:         add     $04,r2
   8:         mov     $9f,r3
   9:         mov     (r2)+,r0
  10:         bic     $!0377,r0
  11:         bis     $sys,r0
  12:         mov     r0,(r3)+
  13:         mov     (r2)+,r0
  14:         mov     (r2)+,r1
  15:         mov     (r2)+,(r3)+
  16:         mov     (r2)+,(r3)+
  17:         mov     (r2)+,(r3)+
  18:         mov     (r2)+,(r3)+
  19:         mov     (r2)+,(r3)+
  20:         sys     0; 9f
  21:         bec     1f
  22:         jmp     cerror
  23: 1:
  24:         jmp     cret
  25: 
  26:         .data
  27: 9:      .=.+12.

Defined functions