1                 : /*
       2                 :  * Copyright 2008 The Native Client Authors. All rights reserved.
       3                 :  * Use of this source code is governed by a BSD-style license that can
       4                 :  * be found in the LICENSE file.
       5                 :  */
       6                 : 
       7                 : /*
       8                 :  * NaCl local descriptor table (LDT) management - common for all platforms
       9                 :  */
      10                 : 
      11                 : #include "native_client/src/trusted/service_runtime/arch/x86/nacl_ldt_x86.h"
      12                 : /* for LDT_ENTRIES */
      13                 : #include "native_client/src/trusted/service_runtime/arch/x86/sel_ldr_x86.h"
      14                 : 
      15                 : /* TODO(gregoryd): These need to come from a header file. */
      16                 : extern int NaClLdtInitPlatformSpecific();
      17                 : extern int NaClLdtFiniPlatformSpecific();
      18                 : 
      19                 : 
      20              14 : int NaClLdtInit() {
      21              14 :   if (!NaClLdtInitPlatformSpecific()) {
      22               0 :     return 0;
      23                 :   }
      24                 :   /* Allocate the last LDT entry to force LDT grow to its maximum size */
      25              14 :   if (!NaClLdtAllocateSelector(LDT_ENTRIES - 1, 0,
      26                 :     NACL_LDT_DESCRIPTOR_DATA, 0, 0, 0)) {
      27               0 :       return 0;
      28                 :   }
      29              14 :   return 1;
      30                 : }
      31                 : 
      32                 : 
      33               9 : void NaClLdtFini() {
      34               9 :   NaClLdtFiniPlatformSpecific();
      35               9 : }