glibc/sysdeps/unix/sysdep.h

/* Copyright (C) 1991, 92, 93, 96, 98 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <sysdeps/generic/sysdep.h>

#include <sys/syscall.h>
#define	HAVE_SYSCALLS

/* Note that using a `PASTE' macro loses.  */
#ifdef	__STDC__
#define	SYSCALL__(name, args)	PSEUDO (__##name, name, args)
#else
#define	SYSCALL__(name, args)	PSEUDO (__/**/name, name, args)
#endif
#define	SYSCALL(name, args)	PSEUDO (name, name, args)

/* Machine-dependent sysdep.h files are expected to define the macro
   PSEUDO (function_name, syscall_name) to emit assembly code to define the
   C-callable function FUNCTION_NAME to do system call SYSCALL_NAME.
   r0 and r1 are the system call outputs.  MOVE(x, y) should be defined as
   an instruction such that "MOVE(r1, r0)" works.  ret should be defined
   as the return instruction.  */

#ifdef __STDC__
#define SYS_ify(syscall_name) SYS_##syscall_name
#else
#define SYS_ify(syscall_name) SYS_/**/syscall_name
#endif

/* Terminate a system call named SYM.  This is used on some platforms
   to generate correct debugging information.  */
#ifndef PSEUDO_END
#define PSEUDO_END(sym)
#endif

/* Wrappers around system calls should normally inline the system call code.
   But sometimes it is not possible or implemented and we use this code.  */
#define INLINE_SYSCALL(name, nr, args...) __syscall_##name (args)