1/*	$OpenBSD: SYS.h,v 1.7 2023/12/10 16:45:50 deraadt Exp $	*/
2/*	$NetBSD: SYS.h,v 1.8 2003/08/07 16:42:02 agc Exp $	*/
3
4/*-
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * William Jolitz.
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 "DEFS.h"
39#include <sys/syscall.h>
40
41#define SYSENTRY(x)					\
42	.weak x;					\
43	x = _thread_sys_ ## x;				\
44	ENTRY(_thread_sys_ ## x)
45#define SYSENTRY_HIDDEN(x)				\
46	ENTRY(_thread_sys_ ## x)
47#define __END_HIDDEN(x)					\
48	END(_thread_sys_ ## x);				\
49	_HIDDEN_FALIAS(x, _thread_sys_ ## x);		\
50	END(_HIDDEN(x))
51#define __END(x)					\
52	__END_HIDDEN(x); END(x)
53
54#define SYSTRAP(x) \
55	ldr	x8, =SYS_ ## x;		\
5697:	svc	0;			\
57	PINSYSCALL(SYS_ ## x, 97b);	\
58	dsb	nsh;			\
59	isb
60
61#define	CERROR		__cerror
62
63#define _SYSCALL_NOERROR(x,y)						\
64	SYSENTRY(x);							\
65	SYSTRAP(y)
66#define _SYSCALL_HIDDEN_NOERROR(x,y)					\
67	SYSENTRY_HIDDEN(x);						\
68	SYSTRAP(y)
69
70#define _SYSCALL(x, y)							\
71	_SYSCALL_NOERROR(x,y);						\
72	bcs CERROR
73#define _SYSCALL_HIDDEN(x, y)						\
74	_SYSCALL_HIDDEN_NOERROR(x,y);					\
75	bcs CERROR
76
77#define SYSCALL_NOERROR(x)						\
78	_SYSCALL_NOERROR(x,x)
79
80#define SYSCALL(x)							\
81	_SYSCALL(x,x)
82
83
84#define PSEUDO_NOERROR(x,y)						\
85	SYSENTRY(x);							\
86	RETGUARD_SETUP(x, x15);						\
87	SYSTRAP(y);							\
88	RETGUARD_CHECK(x, x15);						\
89	ret;								\
90	__END(x)
91
92#define PSEUDO(x,y)							\
93	SYSENTRY(x);							\
94	RETGUARD_SETUP(x, x15);						\
95	SYSTRAP(y);							\
96	bcs CERROR;							\
97	RETGUARD_CHECK(x, x15);						\
98	ret;								\
99	__END(x)
100#define PSEUDO_HIDDEN(x,y)						\
101	SYSENTRY_HIDDEN(x);						\
102	RETGUARD_SETUP(x, x15);						\
103	SYSTRAP(y);							\
104	bcs CERROR;							\
105	RETGUARD_CHECK(x, x15);						\
106	ret;								\
107	__END_HIDDEN(x)
108
109#define RSYSCALL_NOERROR(x)						\
110	PSEUDO_NOERROR(x,x)
111
112#define RSYSCALL(x)							\
113	PSEUDO(x,x)
114#define RSYSCALL_HIDDEN(x)						\
115	PSEUDO_HIDDEN(x,x)
116#define SYSCALL_END(x)							\
117	__END(x)
118#define SYSCALL_END_HIDDEN(x)						\
119	__END_HIDDEN(x)
120
121	.globl	CERROR
122