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
9namespace nacl {
10namespace nonsfi {
11
12namespace {
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.).
17struct 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) }
24const 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
44size_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
61