glibc/sysdeps/unix/sysdep.h

/* Copyright (C) 1991, 1992, 1993 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., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <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.  */

/* Define a macro we can use to construct the asm name for a C symbol.  */
#ifdef	NO_UNDERSCORES
#ifdef	__STDC__
#define C_LABEL(name)		name##:
#else
#define C_LABEL(name)		name/**/:
#endif
#else
#ifdef	__STDC__
#define C_LABEL(name)		_##name##:
#else
#define C_LABEL(name)		_/**/name/**/:
#endif
#endif

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

/* Terminate a function named SYM.  This is used on some platforms to
   generate correct debugging information.  */
#define END(sym)