| /* 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 */ |
