components/nacl/loader/nonsfi/irt_interfaces.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/nacl/loader/nonsfi/irt_interfaces.h"
   6
   7 #include <cstring>
   8
   9 namespace nacl {
  10 namespace nonsfi {
  11
  12 namespace {
  13
  14 // This table keeps a pair of IRT entry (such as nacl_irt_basic, nacl_irt_fdio
  15 // etc.) and its registered name with its version (such as NACL_IRT_BASIC_v0_1,
  16 // NACL_IRT_DEV_FDIO_v0_1, etc.).
  17 struct NaClInterfaceTable {
  18   const char* name;
  19   const void* table;
  20   size_t size;
  21 };
  22
  23 #define NACL_INTERFACE_TABLE(name, value) { name, &value, sizeof(value) }
  24 const NaClInterfaceTable kIrtInterfaces[] = {
  25   NACL_INTERFACE_TABLE(NACL_IRT_BASIC_v0_1, kIrtBasic),
  26   NACL_INTERFACE_TABLE(NACL_IRT_FDIO_v0_1, kIrtFdIO),
  27   NACL_INTERFACE_TABLE(NACL_IRT_MEMORY_v0_3, kIrtMemory),
  28   NACL_INTERFACE_TABLE(NACL_IRT_THREAD_v0_1, kIrtThread),
  29   NACL_INTERFACE_TABLE(NACL_IRT_FUTEX_v0_1, kIrtFutex),
  30   NACL_INTERFACE_TABLE(NACL_IRT_TLS_v0_1, kIrtTls),
  31   NACL_INTERFACE_TABLE(NACL_IRT_CLOCK_v0_1, kIrtClock),
  32   NACL_INTERFACE_TABLE(NACL_IRT_PPAPIHOOK_v0_1, kIrtPpapiHook),
  33   NACL_INTERFACE_TABLE(NACL_IRT_RESOURCE_OPEN_v0_1, kIrtResourceOpen),
  34   NACL_INTERFACE_TABLE(NACL_IRT_RANDOM_v0_1, kIrtRandom),
  35   NACL_INTERFACE_TABLE(NACL_IRT_EXCEPTION_HANDLING_v0_1, kIrtExceptionHandling),
  36 #if defined(__arm__)
  37   NACL_INTERFACE_TABLE(NACL_IRT_ICACHE_v0_1, kIrtIcache),
  38 #endif
  39 };
  40 #undef NACL_INTERFACE_TABLE
  41
  42 }  // namespace
  43
  44 size_t NaClIrtInterface(const char* interface_ident,
  45                         void* table, size_t tablesize) {
  46   for (size_t i = 0; i < arraysize(kIrtInterfaces); ++i) {
  47     if (std::strcmp(interface_ident, kIrtInterfaces[i].name) == 0) {
  48       const size_t size = kIrtInterfaces[i].size;
  49       if (size <= tablesize) {
  50         std::memcpy(table, kIrtInterfaces[i].table, size);
  51         return size;
  52       }
  53       break;
  54     }
  55   }
  56   return 0;
  57 }
  58
  59 }  // namespace nonsfi
  60 }  // namespace nacl