Line data    Source code

       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           1 : 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 */