diff options
Diffstat (limited to 'arch/loongarch/include/asm/vdso/vdso.h')
-rw-r--r-- | arch/loongarch/include/asm/vdso/vdso.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/vdso/vdso.h b/arch/loongarch/include/asm/vdso/vdso.h new file mode 100644 index 000000000000..5a01643a65b3 --- /dev/null +++ b/arch/loongarch/include/asm/vdso/vdso.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Author: Huacai Chen <chenhuacai@loongson.cn> + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited + */ + +#ifndef __ASSEMBLY__ + +#include <asm/asm.h> +#include <asm/page.h> + +static inline unsigned long get_vdso_base(void) +{ + unsigned long addr; + + __asm__( + " la.pcrel %0, _start\n" + : "=r" (addr) + : + :); + + return addr; +} + +static inline const struct vdso_data *get_vdso_data(void) +{ + return (const struct vdso_data *)(get_vdso_base() - PAGE_SIZE); +} + +#endif /* __ASSEMBLY__ */ |