| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ART_RUNTIME_ELF_FILE_H_ |
| #define ART_RUNTIME_ELF_FILE_H_ |
| |
| #include <memory> |
| #include <string> |
| |
| #include "base/macros.h" |
| // Explicitly include our own elf.h to avoid Linux and other dependencies. |
| #include "./elf.h" |
| #include "os.h" |
| |
| namespace art { |
| template <typename Elf_Ehdr, typename Elf_Phdr, typename Elf_Shdr, typename Elf_Word, |
| typename Elf_Sword, typename Elf_Addr, typename Elf_Sym, typename Elf_Rel, |
| typename Elf_Rela, typename Elf_Dyn, typename Elf_Off> |
| class ElfFileImpl; |
| |
| // Explicitly instantiated in elf_file.cc |
| typedef ElfFileImpl<Elf32_Ehdr, Elf32_Phdr, Elf32_Shdr, Elf32_Word, Elf32_Sword, |
| Elf32_Addr, Elf32_Sym, Elf32_Rel, Elf32_Rela, Elf32_Dyn, Elf32_Off> ElfFileImpl32; |
| typedef ElfFileImpl<Elf64_Ehdr, Elf64_Phdr, Elf64_Shdr, Elf64_Word, Elf64_Sword, |
| Elf64_Addr, Elf64_Sym, Elf64_Rel, Elf64_Rela, Elf64_Dyn, Elf64_Off> ElfFileImpl64; |
| |
| // Used for compile time and runtime for ElfFile access. Because of |
| // the need for use at runtime, cannot directly use LLVM classes such as |
| // ELFObjectFile. |
| class ElfFile { |
| public: |
| static ElfFile* Open(File* file, bool writable, bool program_header_only, std::string* error_msg); |
| // Open with specific mmap flags, Always maps in the whole file, not just the |
| // program header sections. |
| static ElfFile* Open(File* file, int mmap_prot, int mmap_flags, std::string* error_msg); |
| ~ElfFile(); |
| |
| // Load segments into memory based on PT_LOAD program headers |
| bool Load(bool executable, std::string* error_msg); |
| |
| const uint8_t* FindDynamicSymbolAddress(const std::string& symbol_name) const; |
| |
| size_t Size() const; |
| |
| uint8_t* Begin() const; |
| |
| uint8_t* End() const; |
| |
| const File& GetFile() const; |
| |
| bool GetSectionOffsetAndSize(const char* section_name, uint64_t* offset, uint64_t* size); |
| |
| uint64_t FindSymbolAddress(unsigned section_type, |
| const std::string& symbol_name, |
| bool build_map); |
| |
| size_t GetLoadedSize() const; |
| |
| // Strip an ELF file of unneeded debugging information. |
| // Returns true on success, false on failure. |
| static bool Strip(File* file, std::string* error_msg); |
| |
| // Fixup an ELF file so that that oat header will be loaded at oat_begin. |
| // Returns true on success, false on failure. |
| static bool Fixup(File* file, uintptr_t oat_data_begin); |
| |
| bool Fixup(uintptr_t base_address); |
| |
| bool Is64Bit() const { |
| return elf64_.get() != nullptr; |
| } |
| |
| ElfFileImpl32* GetImpl32() const { |
| return elf32_.get(); |
| } |
| |
| ElfFileImpl64* GetImpl64() const { |
| return elf64_.get(); |
| } |
| |
| private: |
| explicit ElfFile(ElfFileImpl32* elf32); |
| explicit ElfFile(ElfFileImpl64* elf64); |
| |
| const std::unique_ptr<ElfFileImpl32> elf32_; |
| const std::unique_ptr<ElfFileImpl64> elf64_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ElfFile); |
| }; |
| |
| } // namespace art |
| |
| #endif // ART_RUNTIME_ELF_FILE_H_ |