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 __VVAR_PAGES 2 18 19 #ifndef __ASSEMBLY__ 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 31 extern char compat_vdso_start[], compat_vdso_end[]; 32 33 #endif /* CONFIG_COMPAT */ 34 35 extern char vdso_start[], vdso_end[]; 36 37 #endif /* !__ASSEMBLY__ */ 38 39 #endif /* CONFIG_MMU */ 40 41 #endif /* _ASM_RISCV_VDSO_H */ 42
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