1 files changed, 38 insertions, 0 deletions
diff --git a/arch/x86/include/asm/vsyscall.h b/arch/x86/include/asm/vsyscall.h
new file mode 100644
index 00000000..eaea1d31
--- /dev/null
+++ b/arch/x86/include/asm/vsyscall.h
@@ -0,0 +1,38 @@
+#ifndef _ASM_X86_VSYSCALL_H
+#define _ASM_X86_VSYSCALL_H
+
+enum vsyscall_num {
+	__NR_vgettimeofday,
+	__NR_vtime,
+	__NR_vgetcpu,
+};
+
+#define VSYSCALL_START (-10UL << 20)
+#define VSYSCALL_SIZE 1024
+#define VSYSCALL_END (-2UL << 20)
+#define VSYSCALL_MAPPED_PAGES 1
+#define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr))
+
+#ifdef __KERNEL__
+#include <linux/seqlock.h>
+
+#define VGETCPU_RDTSCP	1
+#define VGETCPU_LSL	2
+
+/* kernel space (writeable) */
+extern int vgetcpu_mode;
+extern struct timezone sys_tz;
+
+#include <asm/vvar.h>
+
+extern void map_vsyscall(void);
+
+/*
+ * Called on instruction fetch fault in vsyscall page.
+ * Returns true if handled.
+ */
+extern bool emulate_vsyscall(struct pt_regs *regs, unsigned long address);
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_X86_VSYSCALL_H */