Teagan Strickland
5f8802b82f
Change-Id: I7868ec621e08773b7d379e95fe091e820bf29c94 Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-linux-release-simarm_x64-try,vm-kernel-precomp-mac-release-simarm64-try,vm-kernel-precomp-win-release-x64-try Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/139807 Reviewed-by: Daco Harkes <dacoharkes@google.com> Commit-Queue: Teagan Strickland <sstrickl@google.com>
106 lines
3.3 KiB
C++
106 lines
3.3 KiB
C++
// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_VM_ELF_H_
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#define RUNTIME_VM_ELF_H_
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#include "vm/allocation.h"
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#include "vm/compiler/runtime_api.h"
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#include "vm/datastream.h"
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#include "vm/growable_array.h"
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#include "vm/zone.h"
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namespace dart {
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class DynamicTable;
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class Section;
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class StringTable;
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class Symbol;
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class SymbolTable;
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class Elf : public ZoneAllocated {
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public:
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Elf(Zone* zone, StreamingWriteStream* stream);
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static const intptr_t kPageSize = 4096;
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intptr_t NextMemoryOffset() const;
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intptr_t NextSectionIndex() const;
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intptr_t AddText(const char* name, const uint8_t* bytes, intptr_t size);
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intptr_t AddROData(const char* name, const uint8_t* bytes, intptr_t size);
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intptr_t AddBSSData(const char* name, intptr_t size);
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void AddDebug(const char* name, const uint8_t* bytes, intptr_t size);
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void AddStaticSymbol(intptr_t section,
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const char* name,
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intptr_t address,
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intptr_t size);
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void Finalize();
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intptr_t position() const { return stream_->position(); }
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void WriteBytes(const uint8_t* b, intptr_t size) {
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stream_->WriteBytes(b, size);
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}
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void WriteByte(uint8_t value) {
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stream_->WriteBytes(reinterpret_cast<uint8_t*>(&value), sizeof(value));
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}
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void WriteHalf(uint16_t value) {
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stream_->WriteBytes(reinterpret_cast<uint8_t*>(&value), sizeof(value));
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}
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void WriteWord(uint32_t value) {
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stream_->WriteBytes(reinterpret_cast<uint8_t*>(&value), sizeof(value));
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}
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void WriteAddr(compiler::target::uword value) {
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stream_->WriteBytes(reinterpret_cast<uint8_t*>(&value), sizeof(value));
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}
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void WriteOff(compiler::target::uword value) {
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stream_->WriteBytes(reinterpret_cast<uint8_t*>(&value), sizeof(value));
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}
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#if defined(TARGET_ARCH_IS_64_BIT)
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void WriteXWord(uint64_t value) {
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stream_->WriteBytes(reinterpret_cast<uint8_t*>(&value), sizeof(value));
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}
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#endif
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private:
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void AddSection(Section* section, const char* name);
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intptr_t AddSectionSymbol(const Section* section,
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const char* name,
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intptr_t size);
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void ComputeFileOffsets();
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void WriteHeader();
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void WriteSectionTable();
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void WriteProgramTable();
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void WriteSections();
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Zone* const zone_;
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StreamingWriteStream* const stream_;
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// All our strings would fit in a single page. However, we use separate
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// .shstrtab and .dynstr to work around a bug in Android's strip utility.
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StringTable* const shstrtab_;
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StringTable* const dynstrtab_;
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SymbolTable* const dynsym_;
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// Can only be created once the dynamic symbol table is complete.
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DynamicTable* dynamic_ = nullptr;
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// The static tables are lazily created when static symbols are added.
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StringTable* strtab_ = nullptr;
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SymbolTable* symtab_ = nullptr;
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GrowableArray<Section*> sections_;
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GrowableArray<Section*> segments_;
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intptr_t memory_offset_;
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intptr_t section_table_file_offset_ = -1;
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intptr_t section_table_file_size_ = -1;
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intptr_t program_table_file_offset_ = -1;
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intptr_t program_table_file_size_ = -1;
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};
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} // namespace dart
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#endif // RUNTIME_VM_ELF_H_
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