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
31 namespace art {
32
GetOatDataAddress(ElfFile * elf_file)33 uintptr_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
GetOatElfInformation(File * file,size_t * oat_loaded_size,size_t * oat_data_offset)41 void 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, false, false, &error_msg));
46 CHECK(elf_file.get() != nullptr) << error_msg;
47
48 bool success = elf_file->GetLoadedSize(oat_loaded_size, &error_msg);
49 CHECK(success) << error_msg;
50 CHECK_NE(0U, *oat_loaded_size);
51 *oat_data_offset = GetOatDataAddress(elf_file.get());
52 CHECK_NE(0U, *oat_data_offset);
53 }
54
Fixup(File * file,uintptr_t oat_data_begin)55 bool ElfWriter::Fixup(File* file, uintptr_t oat_data_begin) {
56 std::string error_msg;
57 std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file, true, false, &error_msg));
58 CHECK(elf_file.get() != nullptr) << error_msg;
59
60 // Lookup "oatdata" symbol address.
61 uintptr_t oatdata_address = ElfWriter::GetOatDataAddress(elf_file.get());
62 uintptr_t base_address = oat_data_begin - oatdata_address;
63
64 return elf_file->Fixup(base_address);
65 }
66
67 } // namespace art
68