diff options
Diffstat (limited to 'arch/riscv/include/asm/vdso.h')
| -rw-r--r-- | arch/riscv/include/asm/vdso.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/vdso.h b/arch/riscv/include/asm/vdso.h new file mode 100644 index 0000000000..f891478829 --- /dev/null +++ b/arch/riscv/include/asm/vdso.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2012 ARM Limited + * Copyright (C) 2014 Regents of the University of California + * Copyright (C) 2017 SiFive + */ + +#ifndef _ASM_RISCV_VDSO_H +#define _ASM_RISCV_VDSO_H + +/* + * All systems with an MMU have a VDSO, but systems without an MMU don't + * support shared libraries and therefore don't have one. + */ +#ifdef CONFIG_MMU + +#define __VVAR_PAGES 2 + +#ifndef __ASSEMBLY__ +#include <generated/vdso-offsets.h> + +#define VDSO_SYMBOL(base, name) \ + (void __user *)((unsigned long)(base) + __vdso_##name##_offset) + +#ifdef CONFIG_COMPAT +#include <generated/compat_vdso-offsets.h> + +#define COMPAT_VDSO_SYMBOL(base, name) \ + (void __user *)((unsigned long)(base) + compat__vdso_##name##_offset) + +extern char compat_vdso_start[], compat_vdso_end[]; + +#endif /* CONFIG_COMPAT */ + +extern char vdso_start[], vdso_end[]; + +#endif /* !__ASSEMBLY__ */ + +#endif /* CONFIG_MMU */ + +#endif /* _ASM_RISCV_VDSO_H */ |