vdso.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (C) 2012 ARM Limited
 4 * Copyright (C) 2014 Regents of the University of California
 5 * Copyright (C) 2017 SiFive
 6 */
 7
 8#ifndef _ASM_RISCV_VDSO_H
 9#define _ASM_RISCV_VDSO_H
10
11/*
12 * All systems with an MMU have a VDSO, but systems without an MMU don't
13 * support shared libraries and therefore don't have one.
14 */
15#ifdef CONFIG_MMU
16
17#define __VDSO_PAGES    4
18
19#ifndef __ASSEMBLER__
20#include <generated/vdso-offsets.h>
21
22#define VDSO_SYMBOL(base, name)							\
23	(void __user *)((unsigned long)(base) + __vdso_##name##_offset)
24
25#ifdef CONFIG_COMPAT
26#include <generated/compat_vdso-offsets.h>
27
28#define COMPAT_VDSO_SYMBOL(base, name)						\
29	(void __user *)((unsigned long)(base) + compat__vdso_##name##_offset)
30
31extern char compat_vdso_start[], compat_vdso_end[];
32
33#endif /* CONFIG_COMPAT */
34
35extern char vdso_start[], vdso_end[];
36
37#endif /* !__ASSEMBLER__ */
38
39#endif /* CONFIG_MMU */
40
41#endif /* _ASM_RISCV_VDSO_H */