/*
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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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#ifndef ART_DEX2OAT_LINKER_ELF_WRITER_H_
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#define ART_DEX2OAT_LINKER_ELF_WRITER_H_
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#include <stdint.h>
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#include <cstddef>
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#include <string>
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#include <vector>
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#include "base/array_ref.h"
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#include "base/macros.h"
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#include "base/mutex.h"
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#include "base/os.h"
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#include "debug/debug_info.h"
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namespace art {
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class ElfFile;
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class OutputStream;
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namespace debug {
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struct MethodDebugInfo;
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} // namespace debug
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namespace linker {
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class ElfWriter {
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public:
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// Looks up information about location of oat file in elf file container.
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// Used for ImageWriter to perform memory layout.
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static void 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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// Returns runtime oat_data runtime address for an opened ElfFile.
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static uintptr_t GetOatDataAddress(ElfFile* elf_file);
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static bool Fixup(File* file, uintptr_t oat_data_begin);
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virtual ~ElfWriter() {}
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virtual void Start() = 0;
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// Prepares memory layout of the whole ELF file, and creates dynamic symbols
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// which point to specific areas of interest (usually section begin and end).
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// This is needed as multi-image needs to know the memory layout of all ELF
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// files, before starting to write them.
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// This method must be called before calling GetLoadedSize().
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virtual void PrepareDynamicSection(size_t rodata_size,
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size_t text_size,
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size_t data_bimg_rel_ro_size,
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size_t bss_size,
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size_t bss_methods_offset,
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size_t bss_roots_offset,
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size_t dex_section_size) = 0;
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virtual void PrepareDebugInfo(const debug::DebugInfo& debug_info) = 0;
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virtual OutputStream* StartRoData() = 0;
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virtual void EndRoData(OutputStream* rodata) = 0;
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virtual OutputStream* StartText() = 0;
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virtual void EndText(OutputStream* text) = 0;
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virtual OutputStream* StartDataBimgRelRo() = 0;
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virtual void EndDataBimgRelRo(OutputStream* data_bimg_rel_ro) = 0;
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virtual void WriteDynamicSection() = 0;
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virtual void WriteDebugInfo(const debug::DebugInfo& debug_info) = 0;
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virtual bool StripDebugInfo() = 0;
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virtual bool End() = 0;
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// Get the ELF writer's stream. This stream can be used for writing data directly
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// to a section after the section has been finished. When that's done, the user
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// should Seek() back to the position where the stream was before this operation.
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virtual OutputStream* GetStream() = 0;
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// Get the size that the loaded ELF file will occupy in memory.
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virtual size_t GetLoadedSize() = 0;
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protected:
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ElfWriter() = default;
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};
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} // namespace linker
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} // namespace art
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#endif // ART_DEX2OAT_LINKER_ELF_WRITER_H_
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