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 
13 struct 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_vvar_start;  /* Negative offset to the vvar area */
22 
23 	long sym_vvar_page;
24 	long sym_pvclock_page;
25 	long sym_hvclock_page;
26 	long sym_timens_page;
27 	long sym_VDSO32_NOTE_MASK;
28 	long sym___kernel_sigreturn;
29 	long sym___kernel_rt_sigreturn;
30 	long sym___kernel_vsyscall;
31 	long sym_int80_landing_pad;
32 	long sym_vdso32_sigreturn_landing_pad;
33 	long sym_vdso32_rt_sigreturn_landing_pad;
34 };
35 
36 #ifdef CONFIG_X86_64
37 extern const struct vdso_image vdso_image_64;
38 #endif
39 
40 #ifdef CONFIG_X86_X32_ABI
41 extern const struct vdso_image vdso_image_x32;
42 #endif
43 
44 #if defined CONFIG_X86_32 || defined CONFIG_COMPAT
45 extern const struct vdso_image vdso_image_32;
46 #endif
47 
48 extern void __init init_vdso_image(const struct vdso_image *image);
49 
50 extern int map_vdso_once(const struct vdso_image *image, unsigned long addr);
51 
52 extern bool fixup_vdso_exception(struct pt_regs *regs, int trapnr,
53 				 unsigned long error_code,
54 				 unsigned long fault_addr);
55 #endif /* __ASSEMBLER__ */
56 
57 #endif /* _ASM_X86_VDSO_H */
58