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
34struct linux_vdso_sym {
35	SLIST_ENTRY(linux_vdso_sym) sym;
36	uint32_t	size;
37	uintptr_t *	ptr;
38	char		symname[];
39};
40
41vm_object_t __elfN(linux_shared_page_init)(char **);
42void	__elfN(linux_shared_page_fini)(vm_object_t);
43void	__elfN(linux_vdso_fixup)(struct sysentvec *);
44void	__elfN(linux_vdso_reloc)(struct sysentvec *, long);
45void	__elfN(linux_vdso_sym_init)(struct linux_vdso_sym *);
46
47#define	LINUX_VDSO_SYM_INTPTR(name)				\
48uintptr_t name;							\
49LINUX_VDSO_SYM_DEFINE(name)
50
51#define	LINUX_VDSO_SYM_CHAR(name)				\
52const char * name;						\
53LINUX_VDSO_SYM_DEFINE(name)
54
55#define	LINUX_VDSO_SYM_DEFINE(name)				\
56static struct linux_vdso_sym name ## sym = {			\
57	.symname	= #name,				\
58	.size		= sizeof(#name),			\
59	.ptr		= (uintptr_t *)&name			\
60};								\
61SYSINIT(__elfN(name ## _sym_init), SI_SUB_EXEC,			\
62    SI_ORDER_FIRST, __elfN(linux_vdso_sym_init), &name ## sym);	\
63struct __hack
64
65#endif	/* _LINUX_VDSO_H_ */
66