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      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 #ifndef ART_COMPILER_ELF_WRITER_H_
     18 #define ART_COMPILER_ELF_WRITER_H_
     19 
     20 #include <stdint.h>
     21 
     22 #include <cstddef>
     23 #include <string>
     24 #include <vector>
     25 
     26 #include <llvm/Support/ELF.h>
     27 
     28 #include "base/macros.h"
     29 #include "os.h"
     30 
     31 namespace art {
     32 
     33 class CompilerDriver;
     34 class DexFile;
     35 class ElfFile;
     36 class OatWriter;
     37 
     38 class ElfWriter {
     39  public:
     40   // Looks up information about location of oat file in elf file container.
     41   // Used for ImageWriter to perform memory layout.
     42   static void GetOatElfInformation(File* file,
     43                                    size_t& oat_loaded_size,
     44                                    size_t& oat_data_offset);
     45 
     46   // Returns runtime oat_data runtime address for an opened ElfFile.
     47   static llvm::ELF::Elf32_Addr GetOatDataAddress(ElfFile* elf_file);
     48 
     49  protected:
     50   ElfWriter(const CompilerDriver& driver, File* elf_file);
     51   virtual ~ElfWriter();
     52 
     53   virtual bool Write(OatWriter& oat_writer,
     54                      const std::vector<const DexFile*>& dex_files,
     55                      const std::string& android_root,
     56                      bool is_host)
     57       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) = 0;
     58 
     59   // Setup by constructor
     60   const CompilerDriver* compiler_driver_;
     61   File* elf_file_;
     62 };
     63 
     64 }  // namespace art
     65 
     66 #endif  // ART_COMPILER_ELF_WRITER_H_
     67