]> CyberLeo.Net >> Repos - FreeBSD/releng/10.3.git/blob - sys/compat/linux/linux_vdso.h
- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
[FreeBSD/releng/10.3.git] / sys / compat / linux / linux_vdso.h
1 /*-
2  * Copyright (c) 2013 Dmitry Chagin
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer
10  *    in this position and unchanged.
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  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  *
26  * $FreeBSD$
27  */
28
29 #ifndef _LINUX_VDSO_H_
30 #define _LINUX_VDSO_H_
31
32 #include <sys/types.h>
33
34 struct linux_vdso_sym {
35         SLIST_ENTRY(linux_vdso_sym) sym;
36         uint32_t        size;
37         uintptr_t *     ptr;
38         char            symname[];
39 };
40
41 vm_object_t __elfN(linux_shared_page_init)(char **);
42 void    __elfN(linux_shared_page_fini)(vm_object_t);
43 void    __elfN(linux_vdso_fixup)(struct sysentvec *);
44 void    __elfN(linux_vdso_reloc)(struct sysentvec *, long);
45 void    __elfN(linux_vdso_sym_init)(struct linux_vdso_sym *);
46
47 #define LINUX_VDSO_SYM_INTPTR(name)                             \
48 uintptr_t name;                                                 \
49 LINUX_VDSO_SYM_DEFINE(name)
50
51 #define LINUX_VDSO_SYM_CHAR(name)                               \
52 const char * name;                                              \
53 LINUX_VDSO_SYM_DEFINE(name)
54
55 #define LINUX_VDSO_SYM_DEFINE(name)                             \
56 static struct linux_vdso_sym name ## sym = {                    \
57         .symname        = #name,                                \
58         .size           = sizeof(#name),                        \
59         .ptr            = (uintptr_t *)&name                    \
60 };                                                              \
61 SYSINIT(__elfN(name ## _sym_init), SI_SUB_EXEC,                 \
62     SI_ORDER_FIRST, __elfN(linux_vdso_sym_init), &name ## sym); \
63 struct __hack
64
65 #endif  /* _LINUX_VDSO_H_ */