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 "base/unix_file/fd_file.h" 20 #include "elf_file.h" 21 22 namespace art { 23 24 uintptr_t ElfWriter::GetOatDataAddress(ElfFile* elf_file) { 25 uintptr_t oatdata_address = elf_file->FindSymbolAddress(SHT_DYNSYM, 26 "oatdata", 27 false); 28 CHECK_NE(0U, oatdata_address); 29 return oatdata_address; 30 } 31 32 void ElfWriter::GetOatElfInformation(File* file, 33 size_t* oat_loaded_size, 34 size_t* oat_data_offset) { 35 std::string error_msg; 36 std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file, 37 false, 38 false, 39 /*low_4gb*/false, 40 &error_msg)); 41 CHECK(elf_file.get() != nullptr) << error_msg; 42 43 bool success = elf_file->GetLoadedSize(oat_loaded_size, &error_msg); 44 CHECK(success) << error_msg; 45 CHECK_NE(0U, *oat_loaded_size); 46 *oat_data_offset = GetOatDataAddress(elf_file.get()); 47 CHECK_NE(0U, *oat_data_offset); 48 } 49 50 bool ElfWriter::Fixup(File* file, uintptr_t oat_data_begin) { 51 std::string error_msg; 52 std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file, true, false, /*low_4gb*/false, &error_msg)); 53 CHECK(elf_file.get() != nullptr) << error_msg; 54 55 // Lookup "oatdata" symbol address. 56 uintptr_t oatdata_address = ElfWriter::GetOatDataAddress(elf_file.get()); 57 uintptr_t base_address = oat_data_begin - oatdata_address; 58 59 return elf_file->Fixup(base_address); 60 } 61 62 } // namespace art 63
