blob: e41377e27534b5f20d230ae226a90b42403047a1 [file] [log] [blame]
* 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include <stdint.h>
#include <cstddef>
#include <string>
#include <vector>
#include "base/array_ref.h"
#include "base/macros.h"
#include "base/mutex.h"
#include "base/os.h"
#include "debug/debug_info.h"
namespace art {
class ElfFile;
class OutputStream;
namespace debug {
struct MethodDebugInfo;
} // namespace debug
namespace linker {
class ElfWriter {
// Looks up information about location of oat file in elf file container.
// Used for ImageWriter to perform memory layout.
static void GetOatElfInformation(File* file,
size_t* oat_loaded_size,
size_t* oat_data_offset);
// Returns runtime oat_data runtime address for an opened ElfFile.
static uintptr_t GetOatDataAddress(ElfFile* elf_file);
virtual ~ElfWriter() {}
virtual void Start() = 0;
// Prepares memory layout of the whole ELF file, and creates dynamic symbols
// which point to specific areas of interest (usually section begin and end).
// This is needed as multi-image needs to know the memory layout of all ELF
// files, before starting to write them.
// This method must be called before calling GetLoadedSize().
virtual void PrepareDynamicSection(size_t rodata_size,
size_t text_size,
size_t data_bimg_rel_ro_size,
size_t bss_size,
size_t bss_methods_offset,
size_t bss_roots_offset,
size_t dex_section_size) = 0;
virtual void PrepareDebugInfo(const debug::DebugInfo& debug_info) = 0;
virtual OutputStream* StartRoData() = 0;
virtual void EndRoData(OutputStream* rodata) = 0;
virtual OutputStream* StartText() = 0;
virtual void EndText(OutputStream* text) = 0;
virtual OutputStream* StartDataBimgRelRo() = 0;
virtual void EndDataBimgRelRo(OutputStream* data_bimg_rel_ro) = 0;
virtual void WriteDynamicSection() = 0;
virtual void WriteDebugInfo(const debug::DebugInfo& debug_info) = 0;
virtual bool StripDebugInfo() = 0;
virtual bool End() = 0;
// Get the ELF writer's stream. This stream can be used for writing data directly
// to a section after the section has been finished. When that's done, the user
// should Seek() back to the position where the stream was before this operation.
virtual OutputStream* GetStream() = 0;
// Get the size that the loaded ELF file will occupy in memory.
virtual size_t GetLoadedSize() = 0;
ElfWriter() = default;
} // namespace linker
} // namespace art