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 */ 58