xref: /openbmc/linux/arch/x86/include/asm/vdso.h (revision d2999e1b)
1 #ifndef _ASM_X86_VDSO_H
2 #define _ASM_X86_VDSO_H
3 
4 #include <asm/page_types.h>
5 #include <linux/linkage.h>
6 #include <linux/init.h>
7 
8 #ifndef __ASSEMBLER__
9 
10 #include <linux/mm_types.h>
11 
12 struct vdso_image {
13 	void *data;
14 	unsigned long size;   /* Always a multiple of PAGE_SIZE */
15 
16 	/* text_mapping.pages is big enough for data/size page pointers */
17 	struct vm_special_mapping text_mapping;
18 
19 	unsigned long alt, alt_len;
20 
21 	unsigned long sym_end_mapping;  /* Total size of the mapping */
22 
23 	unsigned long sym_vvar_page;
24 	unsigned long sym_hpet_page;
25 	unsigned long sym_VDSO32_NOTE_MASK;
26 	unsigned long sym___kernel_sigreturn;
27 	unsigned long sym___kernel_rt_sigreturn;
28 	unsigned long sym___kernel_vsyscall;
29 	unsigned long sym_VDSO32_SYSENTER_RETURN;
30 };
31 
32 #ifdef CONFIG_X86_64
33 extern const struct vdso_image vdso_image_64;
34 #endif
35 
36 #ifdef CONFIG_X86_X32
37 extern const struct vdso_image vdso_image_x32;
38 #endif
39 
40 #if defined CONFIG_X86_32 || defined CONFIG_COMPAT
41 extern const struct vdso_image vdso_image_32_int80;
42 #ifdef CONFIG_COMPAT
43 extern const struct vdso_image vdso_image_32_syscall;
44 #endif
45 extern const struct vdso_image vdso_image_32_sysenter;
46 
47 extern const struct vdso_image *selected_vdso32;
48 #endif
49 
50 extern void __init init_vdso_image(const struct vdso_image *image);
51 
52 #endif /* __ASSEMBLER__ */
53 
54 #endif /* _ASM_X86_VDSO_H */
55