/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "elf_writer.h"
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#include "base/unix_file/fd_file.h"
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#include "elf_file.h"
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namespace art {
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namespace linker {
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uintptr_t ElfWriter::GetOatDataAddress(ElfFile* elf_file) {
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uintptr_t oatdata_address = elf_file->FindSymbolAddress(SHT_DYNSYM,
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"oatdata",
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false);
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CHECK_NE(0U, oatdata_address);
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return oatdata_address;
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}
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void ElfWriter::GetOatElfInformation(File* file,
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size_t* oat_loaded_size,
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size_t* oat_data_offset) {
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std::string error_msg;
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std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file,
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false,
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false,
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/*low_4gb*/false,
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&error_msg));
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CHECK(elf_file.get() != nullptr) << error_msg;
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bool success = elf_file->GetLoadedSize(oat_loaded_size, &error_msg);
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CHECK(success) << error_msg;
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CHECK_NE(0U, *oat_loaded_size);
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*oat_data_offset = GetOatDataAddress(elf_file.get());
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CHECK_NE(0U, *oat_data_offset);
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}
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bool ElfWriter::Fixup(File* file, uintptr_t oat_data_begin) {
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std::string error_msg;
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std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file, true, false, /*low_4gb*/false, &error_msg));
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CHECK(elf_file.get() != nullptr) << error_msg;
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// Lookup "oatdata" symbol address.
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uintptr_t oatdata_address = ElfWriter::GetOatDataAddress(elf_file.get());
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uintptr_t base_address = oat_data_begin - oatdata_address;
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return elf_file->Fixup(base_address);
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}
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} // namespace linker
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} // namespace art
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