DON'T USE THIS -- Providing some missing POSIX File syscalls.

src/trusted/service_runtime/include/sys/time.h

 /*
  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /*
  * NaCl Service Runtime API.  Time types.
  */
 
 #ifndef NATIVE_CLIENT_SRC_TRUSTED_SERVICE_RUNTIME_INCLUDE_SYS_TIME_H_
 #define NATIVE_CLIENT_SRC_TRUSTED_SERVICE_RUNTIME_INCLUDE_SYS_TIME_H_
 
+#include "native_client/src/include/build_config.h"
 #include "native_client/src/trusted/service_runtime/include/machine/_types.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 #if defined(NACL_IN_TOOLCHAIN_HEADERS)
 #ifndef nacl_abi___susecond_t_defined
 #define nacl_abi___susecond_t_defined
 typedef long int  nacl_abi_suseconds_t;
 #endif
 #else
 typedef int32_t   nacl_abi_suseconds_t;
 #endif
 
 #ifndef nacl_abi___clock_t_defined
 #define nacl_abi___clock_t_defined
 typedef long int  nacl_abi_clock_t;  /* to be deprecated */
 #endif
 
+#if NACL_WINDOWS
+__declspec(align(8))
+#endif
 struct nacl_abi_timeval {
   nacl_abi_time_t      nacl_abi_tv_sec;
   nacl_abi_suseconds_t nacl_abi_tv_usec;
+#if NACL_WINDOWS
 };
+#else
+} __attribute__((aligned(8)));
+#endif
 
 /* obsolete.  should not be used */
 struct nacl_abi_timezone {
   int tz_minuteswest;
   int tz_dsttime;
 };
 
 /*
  * In some places (e.g., the linux man page) the second parameter is defined
  * as a struct timezone *.  The header file says this struct type should
  * never be used, and defines it by default as void *.  The Mac man page says
  * it is void *.
  */
 extern int nacl_abi_gettimeofday(struct nacl_abi_timeval *tv, void *tz);
 
 /*
  * POSIX defined clock id values for clock_getres andn clock_gettime.
  */
 
 #define NACL_ABI_CLOCK_REALTIME           (0)
 #define NACL_ABI_CLOCK_MONOTONIC          (1)
 #define NACL_ABI_CLOCK_PROCESS_CPUTIME_ID (2)
 #define NACL_ABI_CLOCK_THREAD_CPUTIME_ID  (3)
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif