libobjc/nil_method.c

   1 /* GNU Objective C Runtime nil receiver function
   2    Copyright (C) 1993, 1995, 1996, 2002 Free Software Foundation, Inc.
   3    Contributed by Kresten Krab Thorup
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify it under the
   8 terms of the GNU General Public License as published by the Free Software
   9 Foundation; either version 2, or (at your option) any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  13 FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  14 details.
  15
  16 You should have received a copy of the GNU General Public License along with
  17 GNU CC; see the file COPYING.  If not, write to the Free Software
  18 Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 /* As a special exception, if you link this library with files compiled with
  22    GCC to produce an executable, this does not cause the resulting executable
  23    to be covered by the GNU General Public License. This exception does not
  24    however invalidate any other reasons why the executable file might be
  25    covered by the GNU General Public License.  */
  26
  27 /* This is the nil method, the function that is called when the receiver
  28    of a method is nil */
  29
  30 #include "runtime.h"
  31
  32 /* nil_method is declared with variable arguments but the runtime calls it
  33    in a way that does not setup the variable arguments correctly.  Some Architectures
  34    that have special arg calling conventions like x86-64 do need every function with
  35    variable arguments called the correct way.  */
  36 id
  37 nil_method (id receiver, SEL op __attribute__ ((__unused__)))
  38 {
  39   return receiver;
  40 }