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Diffstat (limited to '')
| -rw-r--r-- | arch/x86/include/asm/vsyscall.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/x86/include/asm/vsyscall.h b/arch/x86/include/asm/vsyscall.h new file mode 100644 index 000000000..b986b2ca6 --- /dev/null +++ b/arch/x86/include/asm/vsyscall.h @@ -0,0 +1,25 @@ +/* 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 */ |