text: /*	$NetBSD: SYS.h,v 1.2 1999/02/15 04:54:36 hubertf Exp $	*/
  /*-
   * Copyright (c) 1992, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * This software was developed by the Computer Systems Engineering group
   * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
   * contributed to Berkeley.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by the University of
   *	California, Berkeley and its contributors.
   * 4. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   *	@(#)SYS.h	8.1 (Berkeley) 6/4/93
   *
   *	from: Header: SYS.h,v 1.2 92/07/03 18:57:00 torek Exp
   *	$Id: SYS.h,v 1.2 1999/02/15 04:54:36 hubertf Exp $
   */
  
  #include <machine/asm.h>
  #include <sys/syscall.h>
  #include <machine/trap.h>
  
  #ifdef __STDC__
  #define _CAT(x,y) x##y
  #else
  #define _CAT(x,y) x/**/y
  #endif
  
  /*
   * ERROR branches to cerror.  This is done with a macro so that I can
   * change it to be position independent later, if need be.
   */
  #ifdef PIC
  #define	ERROR() \
  	PIC_PROLOGUE(%g1,%g2); \
  	ld [%g1+cerror],%g2; jmp %g2; nop
  #else
  #define	ERROR() \
  	sethi %hi(cerror),%g1; or %lo(cerror),%g1,%g1; jmp %g1; nop
  #endif
  
  /*
   * SYSCALL is used when further action must be taken before returning.
   * Note that it adds a `nop' over what we could do, if we only knew what
   * came at label 1....
   */
  #define	SYSCALL(x) \
  	ENTRY(x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL; bcc 1f; nop; ERROR(); 1:
  
  /*
   * RSYSCALL is used when the system call should just return.  Here
   * we use the SYSCALL_G2RFLAG to put the `success' return address in %g2
   * and avoid a branch.
   */
  #define	RSYSCALL(x) \
  	ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
  	t ST_SYSCALL; ERROR()
  
  /*
   * PSEUDO(x,y) is like RSYSCALL(y) except that the name is x.
   */
  #define	PSEUDO(x,y) \
  	ENTRY(x); mov (_CAT(SYS_,y))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
  	t ST_SYSCALL; ERROR()
  
  /*
   * SYSCALL_NOERROR is like SYSCALL, except it's used for syscalls 
   * that never fail.
   *
   * XXX - This should be optimized.
   */
  #define SYSCALL_NOERROR(x) \
  	ENTRY(x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL
  
  /*
   * RSYSCALL_NOERROR is like RSYSCALL, except it's used for syscalls 
   * that never fail.
   *
   * XXX - This should be optimized.
   */
  #define RSYSCALL_NOERROR(x) \
  	ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
  	t ST_SYSCALL
  
  	.globl	cerror
  