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Diffstat (limited to 'arch/loongarch/include/asm/vdso.h')
| -rw-r--r-- | arch/loongarch/include/asm/vdso.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/vdso.h b/arch/loongarch/include/asm/vdso.h new file mode 100644 index 000000000..d3ba35eb2 --- /dev/null +++ b/arch/loongarch/include/asm/vdso.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Author: Huacai Chen <chenhuacai@loongson.cn> + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited + */ + +#ifndef __ASM_VDSO_H +#define __ASM_VDSO_H + +#include <linux/mm.h> +#include <linux/mm_types.h> +#include <vdso/datapage.h> + +#include <asm/barrier.h> + +/* + * struct loongarch_vdso_info - Details of a VDSO image. + * @vdso: Pointer to VDSO image (page-aligned). + * @size: Size of the VDSO image (page-aligned). + * @off_rt_sigreturn: Offset of the rt_sigreturn() trampoline. + * @code_mapping: Special mapping structure for vdso code. + * @code_mapping: Special mapping structure for vdso data. + * + * This structure contains details of a VDSO image, including the image data + * and offsets of certain symbols required by the kernel. It is generated as + * part of the VDSO build process, aside from the mapping page array, which is + * populated at runtime. + */ +struct loongarch_vdso_info { + void *vdso; + unsigned long size; + unsigned long offset_sigreturn; + struct vm_special_mapping code_mapping; + struct vm_special_mapping data_mapping; +}; + +extern struct loongarch_vdso_info vdso_info; + +#endif /* __ASM_VDSO_H */ |