David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2015 Imagination Technologies |
| 4 | * Author: Alex Smith <alex.smith@imgtec.com> |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #ifndef __ASM_VDSO_H |
| 8 | #define __ASM_VDSO_H |
| 9 | |
| 10 | #include <linux/mm_types.h> |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 11 | #include <vdso/datapage.h> |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 12 | |
| 13 | #include <asm/barrier.h> |
| 14 | |
| 15 | /** |
| 16 | * struct mips_vdso_image - Details of a VDSO image. |
| 17 | * @data: Pointer to VDSO image data (page-aligned). |
| 18 | * @size: Size of the VDSO image data (page-aligned). |
| 19 | * @off_sigreturn: Offset of the sigreturn() trampoline. |
| 20 | * @off_rt_sigreturn: Offset of the rt_sigreturn() trampoline. |
| 21 | * @mapping: Special mapping structure. |
| 22 | * |
| 23 | * This structure contains details of a VDSO image, including the image data |
| 24 | * and offsets of certain symbols required by the kernel. It is generated as |
| 25 | * part of the VDSO build process, aside from the mapping page array, which is |
| 26 | * populated at runtime. |
| 27 | */ |
| 28 | struct mips_vdso_image { |
| 29 | void *data; |
| 30 | unsigned long size; |
| 31 | |
| 32 | unsigned long off_sigreturn; |
| 33 | unsigned long off_rt_sigreturn; |
| 34 | |
| 35 | struct vm_special_mapping mapping; |
| 36 | }; |
| 37 | |
| 38 | /* |
| 39 | * The following structures are auto-generated as part of the build for each |
| 40 | * ABI by genvdso, see arch/mips/vdso/Makefile. |
| 41 | */ |
| 42 | |
| 43 | extern struct mips_vdso_image vdso_image; |
| 44 | |
| 45 | #ifdef CONFIG_MIPS32_O32 |
| 46 | extern struct mips_vdso_image vdso_image_o32; |
| 47 | #endif |
| 48 | |
| 49 | #ifdef CONFIG_MIPS32_N32 |
| 50 | extern struct mips_vdso_image vdso_image_n32; |
| 51 | #endif |
| 52 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 53 | union mips_vdso_data { |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 54 | struct vdso_data data[CS_BASES]; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 55 | u8 page[PAGE_SIZE]; |
| 56 | }; |
| 57 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 58 | #endif /* __ASM_VDSO_H */ |