1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "elf_writer.h"
18
19#include "art_method-inl.h"
20#include "base/unix_file/fd_file.h"
21#include "class_linker.h"
22#include "dex_file-inl.h"
23#include "dex_method_iterator.h"
24#include "driver/compiler_driver.h"
25#include "elf_file.h"
26#include "invoke_type.h"
27#include "mirror/object-inl.h"
28#include "oat.h"
29#include "scoped_thread_state_change.h"
30
31namespace art {
32
33uintptr_t ElfWriter::GetOatDataAddress(ElfFile* elf_file) {
34  uintptr_t oatdata_address = elf_file->FindSymbolAddress(SHT_DYNSYM,
35                                                           "oatdata",
36                                                           false);
37  CHECK_NE(0U, oatdata_address);
38  return oatdata_address;
39}
40
41void ElfWriter::GetOatElfInformation(File* file,
42                                     size_t* oat_loaded_size,
43                                     size_t* oat_data_offset) {
44  std::string error_msg;
45  std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file,
46                                                  false,
47                                                  false,
48                                                  /*low_4gb*/false,
49                                                  &error_msg));
50  CHECK(elf_file.get() != nullptr) << error_msg;
51
52  bool success = elf_file->GetLoadedSize(oat_loaded_size, &error_msg);
53  CHECK(success) << error_msg;
54  CHECK_NE(0U, *oat_loaded_size);
55  *oat_data_offset = GetOatDataAddress(elf_file.get());
56  CHECK_NE(0U, *oat_data_offset);
57}
58
59bool ElfWriter::Fixup(File* file, uintptr_t oat_data_begin) {
60  std::string error_msg;
61  std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file, true, false, /*low_4gb*/false, &error_msg));
62  CHECK(elf_file.get() != nullptr) << error_msg;
63
64  // Lookup "oatdata" symbol address.
65  uintptr_t oatdata_address = ElfWriter::GetOatDataAddress(elf_file.get());
66  uintptr_t base_address = oat_data_begin - oatdata_address;
67
68  return elf_file->Fixup(base_address);
69}
70
71}  // namespace art
72