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27 lines
703 B
27 lines
703 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_X86_VSYSCALL_H |
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#define _ASM_X86_VSYSCALL_H |
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#include <linux/seqlock.h> |
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#include <uapi/asm/vsyscall.h> |
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#ifdef CONFIG_X86_VSYSCALL_EMULATION |
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extern void map_vsyscall(void); |
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extern void set_vsyscall_pgtable_user_bits(pgd_t *root); |
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/* |
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* Called on instruction fetch fault in vsyscall page. |
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* Returns true if handled. |
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*/ |
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extern bool emulate_vsyscall(unsigned long error_code, |
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struct pt_regs *regs, unsigned long address); |
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#else |
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static inline void map_vsyscall(void) {} |
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static inline bool emulate_vsyscall(unsigned long error_code, |
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struct pt_regs *regs, unsigned long address) |
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{ |
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return false; |
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} |
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#endif |
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#endif /* _ASM_X86_VSYSCALL_H */
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