diff --git a/libc/kernel/arch-x86/asm/xen/hypercall.h b/libc/kernel/arch-x86/asm/xen/hypercall.h
new file mode 100644
index 0000000..3c523a8
--- /dev/null
+++ b/libc/kernel/arch-x86/asm/xen/hypercall.h
@@ -0,0 +1,34 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef __HYPERCALL_H__
+#define __HYPERCALL_H__
+
+#include <linux/errno.h>
+#include <linux/string.h>
+
+#include <xen/interface/xen.h>
+#include <xen/interface/sched.h>
+#include <xen/interface/physdev.h>
+
+#define _hypercall0(type, name)  ({   long __res;   asm volatile (   "call %[call]"   : "=a" (__res)   : [call] "m" (hypercall_page[__HYPERVISOR_##name])   : "memory" );   (type)__res;  })
+
+#define _hypercall1(type, name, a1)  ({   long __res, __ign1;   asm volatile (   "call %[call]"   : "=a" (__res), "=b" (__ign1)   : "1" ((long)(a1)),   [call] "m" (hypercall_page[__HYPERVISOR_##name])   : "memory" );   (type)__res;  })
+
+#define _hypercall2(type, name, a1, a2)  ({   long __res, __ign1, __ign2;   asm volatile (   "call %[call]"   : "=a" (__res), "=b" (__ign1), "=c" (__ign2)   : "1" ((long)(a1)), "2" ((long)(a2)),   [call] "m" (hypercall_page[__HYPERVISOR_##name])   : "memory" );   (type)__res;  })
+
+#define _hypercall3(type, name, a1, a2, a3)  ({   long __res, __ign1, __ign2, __ign3;   asm volatile (   "call %[call]"   : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   "=d" (__ign3)   : "1" ((long)(a1)), "2" ((long)(a2)),   "3" ((long)(a3)),   [call] "m" (hypercall_page[__HYPERVISOR_##name])   : "memory" );   (type)__res;  })
+
+#define _hypercall4(type, name, a1, a2, a3, a4)  ({   long __res, __ign1, __ign2, __ign3, __ign4;   asm volatile (   "call %[call]"   : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   "=d" (__ign3), "=S" (__ign4)   : "1" ((long)(a1)), "2" ((long)(a2)),   "3" ((long)(a3)), "4" ((long)(a4)),   [call] "m" (hypercall_page[__HYPERVISOR_##name])   : "memory" );   (type)__res;  })
+
+#define _hypercall5(type, name, a1, a2, a3, a4, a5)  ({   long __res, __ign1, __ign2, __ign3, __ign4, __ign5;   asm volatile (   "call %[call]"   : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   "=d" (__ign3), "=S" (__ign4), "=D" (__ign5)   : "1" ((long)(a1)), "2" ((long)(a2)),   "3" ((long)(a3)), "4" ((long)(a4)),   "5" ((long)(a5)),   [call] "m" (hypercall_page[__HYPERVISOR_##name])   : "memory" );   (type)__res;  })
+
+#endif