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 int __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
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