1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
/* $NetBSD: ras.h,v 1.15 2021/01/11 21:51:20 skrll Exp $ */
/*-
* Copyright (c) 2002, 2004, 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Gregory McGarry.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#ifndef _SYS_RAS_H_
#define _SYS_RAS_H_
#ifndef __ASSEMBLER__
#include <sys/types.h>
#include <sys/queue.h>
struct ras {
struct ras *ras_next;
void *ras_startaddr;
void *ras_endaddr;
};
#define RAS_INSTALL 0
#define RAS_PURGE 1
#define RAS_PURGE_ALL 2
#else
#include <sys/cdefs.h>
#endif /* __ASSEMBLER__ */
#ifdef _KERNEL
#ifndef __ASSEMBLER__
struct proc;
void *ras_lookup(struct proc *, void *);
int ras_fork(struct proc *, struct proc *);
int ras_purgeall(void);
#endif /* __ASSEMBLER__ */
#else /* !_KERNEL */
#ifndef RAS_DECL
#define RAS_DECL(name) \
extern void __CONCAT(name,_ras_start(void)), __CONCAT(name,_ras_end(void))
#endif /* RAS_DECL */
/*
* RAS_START and RAS_END contain implicit instruction reordering
* barriers. See __insn_barrier() in <sys/cdefs.h>.
*
* Note: You are strongly advised to avoid coding RASs in C. There is a
* good chance the compiler will generate code which cannot be restarted.
*/
#define RAS_START(name) \
__asm volatile(".globl " ___STRING(name) "_ras_start\n" \
___STRING(name) "_ras_start:" \
::: "memory")
#define RAS_END(name) \
__asm volatile(".globl " ___STRING(name) "_ras_end\n" \
___STRING(name) "_ras_end:" \
::: "memory")
#define RAS_ADDR(name) ((void *)(uintptr_t) __CONCAT(name,_ras_start))
#define RAS_SIZE(name) ((size_t)((uintptr_t) __CONCAT(name,_ras_end) - \
(uintptr_t) __CONCAT(name,_ras_start)))
#ifndef __ASSEMBLER__
__BEGIN_DECLS
int rasctl(void *, size_t, int);
__END_DECLS
#else /* __ASSEMBLER__ */
#ifndef _ASM_LS_CHAR
#define _ASM_LS_CHAR ;
#endif
/*
* RAS_START_ASM and RAS_END_ASM are for use within assembly code.
* This is the preferred method of coding a RAS.
*/
#define RAS_START_ASM(name) \
.globl _C_LABEL(__CONCAT(name,_ras_start)) _ASM_LS_CHAR \
_C_LABEL(__CONCAT(name,_ras_start)):
#define RAS_END_ASM(name) \
.globl _C_LABEL(__CONCAT(name,_ras_end)) _ASM_LS_CHAR \
_C_LABEL(__CONCAT(name,_ras_end)):
/*
* RAS_START_ASM_HIDDEN and RAS_END_ASM_HIDDEN are similar to the above,
* except that they limit the scope of the symbol such that it will not
* be placed into the dynamic symbol table. Thus no other module (executable
* or shared library) can reference it directly.
*/
#define RAS_START_ASM_HIDDEN(name) \
.globl _C_LABEL(__CONCAT(name,_ras_start)) _ASM_LS_CHAR \
.hidden _C_LABEL(__CONCAT(name,_ras_start)) _ASM_LS_CHAR \
_C_LABEL(__CONCAT(name,_ras_start)):
#define RAS_END_ASM_HIDDEN(name) \
.globl _C_LABEL(__CONCAT(name,_ras_end)) _ASM_LS_CHAR \
.hidden _C_LABEL(__CONCAT(name,_ras_end)) _ASM_LS_CHAR \
_C_LABEL(__CONCAT(name,_ras_end)):
#endif /* __ASSEMBLER__ */
#endif /* _KERNEL */
#endif /* !_SYS_RAS_H_ */
|
