vdso.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_X86_VDSO_H
 3#define _ASM_X86_VDSO_H
 4
 5#include <asm/page_types.h>
 6#include <linux/linkage.h>
 7#include <linux/init.h>
 8
 9#ifndef __ASSEMBLER__
10
11#include <linux/mm_types.h>
12
13struct vdso_image {
14	void *data;
15	unsigned long size;   /* Always a multiple of PAGE_SIZE */
16
17	unsigned long alt, alt_len;
18	unsigned long extable_base, extable_len;
19	const void *extable;
20
21	long sym_VDSO32_NOTE_MASK;
22	long sym___kernel_sigreturn;
23	long sym___kernel_rt_sigreturn;
24	long sym___kernel_vsyscall;
25	long sym_int80_landing_pad;
26	long sym_vdso32_sigreturn_landing_pad;
27	long sym_vdso32_rt_sigreturn_landing_pad;
28};
29
30extern const struct vdso_image vdso_image_64;
31extern const struct vdso_image vdso_image_x32;
32extern const struct vdso_image vdso_image_32;
33
34extern int __init init_vdso_image(const struct vdso_image *image);
35
36extern int map_vdso_once(const struct vdso_image *image, unsigned long addr);
37
38extern bool fixup_vdso_exception(struct pt_regs *regs, int trapnr,
39				 unsigned long error_code,
40				 unsigned long fault_addr);
41#endif /* __ASSEMBLER__ */
42
43#endif /* _ASM_X86_VDSO_H */