| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _ASM_X86_VSYSCALL_H |
| 3 | #define _ASM_X86_VSYSCALL_H |
| 4 | |
| 5 | #include <linux/seqlock.h> |
| 6 | #include <uapi/asm/vsyscall.h> |
| 7 | |
| 8 | #ifdef CONFIG_X86_VSYSCALL_EMULATION |
| 9 | extern void map_vsyscall(void); |
| 10 | extern void set_vsyscall_pgtable_user_bits(pgd_t *root); |
| 11 | |
| 12 | /* |
| 13 | * Called on instruction fetch fault in vsyscall page. |
| 14 | * Returns true if handled. |
| 15 | */ |
| 16 | extern bool emulate_vsyscall(unsigned long error_code, |
| 17 | struct pt_regs *regs, unsigned long address); |
| 18 | #else |
| 19 | static inline void map_vsyscall(void) {} |
| 20 | static inline bool emulate_vsyscall(unsigned long error_code, |
| 21 | struct pt_regs *regs, unsigned long address) |
| 22 | { |
| 23 | return false; |
| 24 | } |
| 25 | #endif |
| 26 | |
| 27 | #endif /* _ASM_X86_VSYSCALL_H */ |