diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/mips/include/asm/vdso.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/mips/include/asm/vdso.h b/arch/mips/include/asm/vdso.h new file mode 100644 index 000000000..cc7b51612 --- /dev/null +++ b/arch/mips/include/asm/vdso.h @@ -0,0 +1,58 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2015 Imagination Technologies + * Author: Alex Smith <alex.smith@imgtec.com> + */ + +#ifndef __ASM_VDSO_H +#define __ASM_VDSO_H + +#include <linux/mm_types.h> +#include <vdso/datapage.h> + +#include <asm/barrier.h> + +/** + * struct mips_vdso_image - Details of a VDSO image. + * @data: Pointer to VDSO image data (page-aligned). + * @size: Size of the VDSO image data (page-aligned). + * @off_sigreturn: Offset of the sigreturn() trampoline. + * @off_rt_sigreturn: Offset of the rt_sigreturn() trampoline. + * @mapping: Special mapping structure. + * + * 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 mips_vdso_image { + void *data; + unsigned long size; + + unsigned long off_sigreturn; + unsigned long off_rt_sigreturn; + + struct vm_special_mapping mapping; +}; + +/* + * The following structures are auto-generated as part of the build for each + * ABI by genvdso, see arch/mips/vdso/Makefile. + */ + +extern struct mips_vdso_image vdso_image; + +#ifdef CONFIG_MIPS32_O32 +extern struct mips_vdso_image vdso_image_o32; +#endif + +#ifdef CONFIG_MIPS32_N32 +extern struct mips_vdso_image vdso_image_n32; +#endif + +union mips_vdso_data { + struct vdso_data data[CS_BASES]; + u8 page[PAGE_SIZE]; +}; + +#endif /* __ASM_VDSO_H */ |