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      1 /*	$NetBSD: SYS.h,v 1.18 2013/07/24 15:38:07 matt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * the Systems Programming Group of the University of Utah Computer
      9  * Science Department.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	from: @(#)SYS.h	5.5 (Berkeley) 5/7/91
     36  */
     37 
     38 #include <sys/syscall.h>
     39 #include <machine/asm.h>
     40 
     41 #ifdef __STDC__
     42 #define	IMMEDIATE	#
     43 #define SYSTRAP(x)	movl IMMEDIATE SYS_ ## x ## ,%d0; trap IMMEDIATE 0
     44 #else
     45 #define SYSTRAP(x)	movl #SYS_/**/x,%d0; trap #0
     46 #endif
     47 
     48 #define CERROR		_C_LABEL(__cerror)
     49 
     50 #define _SYSCALL_NOERROR(x,y)						\
     51 	ENTRY(x);							\
     52 	SYSTRAP(y)
     53 
     54 #define _SYSCALL(x,y)							\
     55 	_SYSCALL_NOERROR(x,y);						\
     56 	jcs CERROR
     57 
     58 #define SYSCALL_NOERROR(x)						\
     59 	_SYSCALL_NOERROR(x,x)
     60 
     61 #define SYSCALL(x)							\
     62 	_SYSCALL(x,x)
     63 
     64 #define PSEUDO_NOERROR(x,y)						\
     65 	_SYSCALL_NOERROR(x,y);						\
     66 	rts;								\
     67 	END(x)
     68 
     69 #define PSEUDO(x,y)							\
     70 	_SYSCALL(x,y);							\
     71 	rts;								\
     72 	END(x)
     73 
     74 #define RSYSCALL_NOERROR(x)						\
     75 	PSEUDO_NOERROR(x,x)
     76 
     77 #define RSYSCALL(x)							\
     78 	PSEUDO(x,x)
     79 
     80 #ifdef WEAK_ALIAS
     81 #define	WSYSCALL(weak,strong)						\
     82 	WEAK_ALIAS(weak,strong);					\
     83 	PSEUDO(strong,weak)
     84 #else
     85 #define	WSYSCALL(weak,strong)						\
     86 	PSEUDO(weak,weak)
     87 #endif
     88 
     89 #define	ASMSTR		.asciz
     90 
     91 	.globl	CERROR
     92 	.hidden	CERROR
     93