SYS.h revision 1.8 
1/*	$NetBSD: SYS.h,v 1.8 2002/05/26 11:48:04 wiz Exp $ */
2/*
3 * Copyright (c) 1983, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by the University of
17 *	California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *	@(#)SYS.h	8.1 (Berkeley) 6/4/93
35 */
36
37#include <machine/asm.h>
38#include <sys/syscall.h>
39
40#define SYSTRAP(x)	chmk $ SYS_ ## x
41
42#define _SYSCALL_NOERROR(x,y)						\
43	ENTRY(x,0);							\
44	SYSTRAP(y)
45
46#define _SYSCALL(x,y)							\
47	err: nop; nop; jmp CERROR+2;					\
48	_SYSCALL_NOERROR(x,y);						\
49	jcs err+2
50
51#define SYSCALL_NOERROR(x)						\
52	_SYSCALL_NOERROR(x,x)
53
54#define SYSCALL(x)							\
55	_SYSCALL(x,x)
56
57#define PSEUDO_NOERROR(x,y)						\
58	_SYSCALL_NOERROR(x,y);						\
59	ret
60
61#define PSEUDO(x,y)							\
62	_SYSCALL(x,y);							\
63	ret
64
65#define RSYSCALL_NOERROR(x)						\
66	PSEUDO_NOERROR(x,x)
67
68#define RSYSCALL(x)							\
69	PSEUDO(x,x)
70
71#ifdef WEAK_ALIAS
72#define	WSYSCALL(weak,strong)						\
73	WEAK_ALIAS(weak,strong);					\
74	PSEUDO(strong,weak)
75#else
76#define	WSYSCALL(weak,strong)						\
77	PSEUDO(weak,weak)
78#endif
79
80#define	ASMSTR		.asciz
81
82#ifdef __ELF__
83#define	CERROR	_C_LABEL(__cerror)
84#define	CURBRK	_C_LABEL(__curbrk)
85#else
86#define	CERROR	_ASM_LABEL(cerror)
87#define	CURBRK	_ASM_LABEL(curbrk)
88#endif
89
90	.globl	CERROR
91