[mirror_ubuntu-bionic-kernel.git] / arch / x86 / include / asm / vsyscall.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_VSYSCALL_H
#define _ASM_X86_VSYSCALL_H

#include <linux/seqlock.h>
#include <uapi/asm/vsyscall.h>

#ifdef CONFIG_X86_VSYSCALL_EMULATION
extern void map_vsyscall(void);
extern void set_vsyscall_pgtable_user_bits(pgd_t *root);

/*
 * Called on instruction fetch fault in vsyscall page.
 * Returns true if handled.
 */
extern bool emulate_vsyscall(struct pt_regs *regs, unsigned long address);
#else
static inline void map_vsyscall(void) {}
static inline bool emulate_vsyscall(struct pt_regs *regs, unsigned long address)
{
	return false;
}
#endif

#endif /* _ASM_X86_VSYSCALL_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1965aae3 PA	2	#ifndef _ASM_X86_VSYSCALL_H
1965aae3 PA	3	#define _ASM_X86_VSYSCALL_H
1da177e4	4
75da736f	5	#include <linux/seqlock.h>
af170c50	6	#include <uapi/asm/vsyscall.h>
1da177e4	7
1ad83c85	8	#ifdef CONFIG_X86_VSYSCALL_EMULATION
e4026440	9	extern void map_vsyscall(void);
85900ea5	10	extern void set_vsyscall_pgtable_user_bits(pgd_t *root);
e4026440	11
3ae36655 AL	12	/*
	13	* Called on instruction fetch fault in vsyscall page.
	14	* Returns true if handled.
	15	*/
	16	extern bool emulate_vsyscall(struct pt_regs *regs, unsigned long address);
1ad83c85 AL	17	#else
	18	static inline void map_vsyscall(void) {}
	19	static inline bool emulate_vsyscall(struct pt_regs *regs, unsigned long address)
	20	{
	21	return false;
	22	}
	23	#endif
3ae36655	24
1965aae3	25	#endif /* _ASM_X86_VSYSCALL_H */