kernel/arch/x86/include/asm/vdso.h

   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         long sym_vvar_start;  /* Negative offset to the vvar area */
  22
  23         long sym_vvar_page;
  24         long sym_hpet_page;
  25         long sym_VDSO32_NOTE_MASK;
  26         long sym___kernel_sigreturn;
  27         long sym___kernel_rt_sigreturn;
  28         long sym___kernel_vsyscall;
  29         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 */