arch/x86/include/asm/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
  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
  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 */