1                 : /*
       2                 :  * Copyright (c) 2011 The Native Client Authors. All rights reserved.
       3                 :  * Use of this source code is governed by a BSD-style license that can be
       4                 :  * found in the LICENSE file.
       5                 :  */
       6                 : 
       7                 : #ifndef NATIVE_CLIENT_SRC_TRUSTED_SERVICE_RUNTIME_NACL_STACK_SAFETY_H_
       8                 : #define NATIVE_CLIENT_SRC_TRUSTED_SERVICE_RUNTIME_NACL_STACK_SAFETY_H_
       9                 : 
      10                 : #include "native_client/src/include/nacl_base.h"
      11                 : #include "native_client/src/include/portability.h"
      12                 : 
      13                 : EXTERN_C_BEGIN
      14                 : 
      15                 : /*
      16                 :  * NB: Relying code should open-code -- not use a function call -- in
      17                 :  * assembly the necessary code to read nacl_thread_on_safe_stack.
      18                 :  */
      19                 : 
      20                 : #if (NACL_WINDOWS && NACL_ARCH(NACL_BUILD_ARCH) == NACL_x86 &&  \
      21                 :      NACL_BUILD_SUBARCH == 64)
      22                 : 
      23                 : extern THREAD uint32_t nacl_on_safe_stack;
      24                 : 
      25                 : static INLINE void NaClStackSafetyNowOnUntrustedStack(void) {
      26                 :   nacl_on_safe_stack = 0;
      27                 : }
      28                 : 
      29                 : static INLINE void NaClStackSafetyNowOnTrustedStack(void) {
      30                 :   nacl_on_safe_stack = 1;
      31                 : }
      32                 : 
      33                 : #else
      34                 : 
      35                 : static INLINE void NaClStackSafetyNowOnUntrustedStack(void) {
      36         3538690 : }
      37                 : 
      38                 : static INLINE void NaClStackSafetyNowOnTrustedStack(void) {
      39         3538671 : }
      40                 : 
      41                 : #endif
      42                 : 
      43                 : EXTERN_C_END
      44                 : 
      45                 : #endif