sysdeps/unix/sysdep.h

   1 /* Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <syscall.h>
  20 #define HAVE_SYSCALLS
  21
  22 /* Note that using a `PASTE' macro loses.  */
  23 #ifdef  __STDC__
  24 #define SYSCALL__(name, args)   PSEUDO (__##name, name, args)
  25 #else
  26 #define SYSCALL__(name, args)   PSEUDO (__/**/name, name, args)
  27 #endif
  28 #define SYSCALL(name, args)     PSEUDO (name, name, args)
  29
  30 /* Machine-dependent sysdep.h files are expected to define the macro
  31    PSEUDO (function_name, syscall_name) to emit assembly code to define the
  32    C-callable function FUNCTION_NAME to do system call SYSCALL_NAME.
  33    r0 and r1 are the system call outputs.  MOVE(x, y) should be defined as
  34    an instruction such that "MOVE(r1, r0)" works.  ret should be defined
  35    as the return instruction.  */
  36
  37 /* Define a macro we can use to construct the asm name for a C symbol.  */
  38 #ifdef  NO_UNDERSCORES
  39 #ifdef  __STDC__
  40 #define C_LABEL(name)           name##:
  41 #else
  42 #define C_LABEL(name)           name/**/:
  43 #endif
  44 #else
  45 #ifdef  __STDC__
  46 #define C_LABEL(name)           _##name##:
  47 #else
  48 #define C_LABEL(name)           _/**/name/**/:
  49 #endif
  50 #endif
  51
  52 #ifdef __STDC__
  53 #define SYS_ify(syscall_name) SYS_##syscall_name
  54 #else
  55 #define SYS_ify(syscall_name) SYS_/**/syscall_name
  56 #endif
  57
  58 /* Terminate a system call named SYM.  This is used on some platforms
  59    to generate correct debugging information.  */
  60 #define PSEUDO_END(sym)