diff --git a/libc/include/sys/user.h b/libc/include/sys/user.h
new file mode 100644
index 0000000..dc07c1f
--- /dev/null
+++ b/libc/include/sys/user.h
@@ -0,0 +1,191 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _SYS_USER_H_
+#define _SYS_USER_H_
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#if __i386__
+
+struct user_i387_struct {
+  long cwd;
+  long swd;
+  long twd;
+  long fip;
+  long fcs;
+  long foo;
+  long fos;
+  long st_space[20];
+};
+struct user_fxsr_struct {
+  unsigned short cwd;
+  unsigned short swd;
+  unsigned short twd;
+  unsigned short fop;
+  long fip;
+  long fcs;
+  long foo;
+  long fos;
+  long mxcsr;
+  long reserved;
+  long st_space[32];
+  long xmm_space[32];
+  long padding[56];
+};
+struct user_regs_struct {
+  unsigned long bx;
+  unsigned long cx;
+  unsigned long dx;
+  unsigned long si;
+  unsigned long di;
+  unsigned long bp;
+  unsigned long ax;
+  unsigned long ds;
+  unsigned long es;
+  unsigned long fs;
+  unsigned long gs;
+  unsigned long orig_ax;
+  unsigned long ip;
+  unsigned long cs;
+  unsigned long flags;
+  unsigned long sp;
+  unsigned long ss;
+};
+struct user{
+  struct user_regs_struct regs;
+  int u_fpvalid;
+  struct user_i387_struct i387;
+  unsigned long int u_tsize;
+  unsigned long int u_dsize;
+  unsigned long int u_ssize;
+  unsigned long start_code;
+  unsigned long start_stack;
+  long int signal;
+  int reserved;
+  unsigned long u_ar0;
+  struct user_i387_struct *u_fpstate;
+  unsigned long magic;
+  char u_comm[32];
+  int u_debugreg[8];
+};
+
+#elif defined(__x86_64__)
+
+struct user_i387_struct {
+  unsigned short cwd;
+  unsigned short swd;
+  unsigned short twd;
+  unsigned short fop;
+  __u64 rip;
+  __u64 rdp;
+  __u32 mxcsr;
+  __u32 mxcsr_mask;
+  __u32 st_space[32];
+  __u32 xmm_space[64];
+  __u32 padding[24];
+};
+struct user_regs_struct {
+  unsigned long r15;
+  unsigned long r14;
+  unsigned long r13;
+  unsigned long r12;
+  unsigned long bp;
+  unsigned long bx;
+  unsigned long r11;
+  unsigned long r10;
+  unsigned long r9;
+  unsigned long r8;
+  unsigned long ax;
+  unsigned long cx;
+  unsigned long dx;
+  unsigned long si;
+  unsigned long di;
+  unsigned long orig_ax;
+  unsigned long ip;
+  unsigned long cs;
+  unsigned long flags;
+  unsigned long sp;
+  unsigned long ss;
+  unsigned long fs_base;
+  unsigned long gs_base;
+  unsigned long ds;
+  unsigned long es;
+  unsigned long fs;
+  unsigned long gs;
+};
+struct user {
+  struct user_regs_struct regs;
+  int u_fpvalid;
+  int pad0;
+  struct user_i387_struct i387;
+  unsigned long int u_tsize;
+  unsigned long int u_dsize;
+  unsigned long int u_ssize;
+  unsigned long start_code;
+  unsigned long start_stack;
+  long int signal;
+  int reserved;
+  int pad1;
+  unsigned long u_ar0;
+  struct user_i387_struct *u_fpstate;
+  unsigned long magic;
+  char u_comm[32];
+  unsigned long u_debugreg[8];
+  unsigned long error_code;
+  unsigned long fault_address;
+};
+
+#elif defined(__mips__)
+
+struct user {
+  unsigned long regs[180 / sizeof(unsigned long) + 64];
+  size_t u_tsize;
+  size_t u_dsize;
+  size_t u_ssize;
+  unsigned long start_code;
+  unsigned long start_data;
+  unsigned long start_stack;
+  long int signal;
+  unsigned long u_ar0;
+  unsigned long magic;
+  char u_comm[32];
+};
+
+#else
+
+/* arm and aarch64 have uapi user.h headers. */
+#include <asm/user.h>
+
+#endif
+
+__END_DECLS
+
+#endif  /* _SYS_USER_H_ */