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___kernel_sigreturn; 22 long sym___kernel_rt_sigreturn; 23 long sym___kernel_vsyscall; 24 long sym_int80_landing_pad; 25 long sym_vdso32_sigreturn_landing_pad; 26 long sym_vdso32_rt_sigreturn_landing_pad; 27 }; 28 29 extern const struct vdso_image vdso64_image; 30 extern const struct vdso_image vdsox32_image; 31 extern const struct vdso_image vdso32_image; 32 33 extern int __init init_vdso_image(const struct vdso_image *image); 34 35 extern int map_vdso_once(const struct vdso_image *image, unsigned long addr); 36 37 extern bool fixup_vdso_exception(struct pt_regs *regs, int trapnr, 38 unsigned long error_code, 39 unsigned long fault_addr); 40 #endif /* __ASSEMBLER__ */ 41 42 #endif /* _ASM_X86_VDSO_H */ 43