Wasm.h revision 311116 
1//===- WasmObjectFile.h - Wasm object file implementation -------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file declares the WasmObjectFile class, which implements the ObjectFile
11// interface for Wasm files.
12//
13// See: https://github.com/WebAssembly/design/blob/master/BinaryEncoding.md
14//
15//===----------------------------------------------------------------------===//
16
17#ifndef LLVM_OBJECT_WASM_H
18#define LLVM_OBJECT_WASM_H
19
20#include "llvm/Object/ObjectFile.h"
21#include "llvm/Support/Wasm.h"
22
23namespace llvm {
24namespace object {
25
26class WasmObjectFile : public ObjectFile {
27public:
28  WasmObjectFile(MemoryBufferRef Object, Error &Err);
29  const wasm::WasmObjectHeader &getHeader() const;
30  const wasm::WasmSection *getWasmSection(const SectionRef &Section) const;
31  static bool classof(const Binary *v) { return v->isWasm(); }
32
33protected:
34  void moveSymbolNext(DataRefImpl &Symb) const override;
35
36  std::error_code printSymbolName(raw_ostream &OS,
37                                  DataRefImpl Symb) const override;
38
39  uint32_t getSymbolFlags(DataRefImpl Symb) const override;
40
41  basic_symbol_iterator symbol_begin() const override;
42
43  basic_symbol_iterator symbol_end() const override;
44  Expected<StringRef> getSymbolName(DataRefImpl Symb) const override;
45
46  Expected<uint64_t> getSymbolAddress(DataRefImpl Symb) const override;
47  uint64_t getSymbolValueImpl(DataRefImpl Symb) const override;
48  uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
49  uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
50  Expected<SymbolRef::Type> getSymbolType(DataRefImpl Symb) const override;
51  Expected<section_iterator> getSymbolSection(DataRefImpl Symb) const override;
52
53  // Overrides from SectionRef.
54  void moveSectionNext(DataRefImpl &Sec) const override;
55  std::error_code getSectionName(DataRefImpl Sec,
56                                 StringRef &Res) const override;
57  uint64_t getSectionAddress(DataRefImpl Sec) const override;
58  uint64_t getSectionSize(DataRefImpl Sec) const override;
59  std::error_code getSectionContents(DataRefImpl Sec,
60                                     StringRef &Res) const override;
61  uint64_t getSectionAlignment(DataRefImpl Sec) const override;
62  bool isSectionCompressed(DataRefImpl Sec) const override;
63  bool isSectionText(DataRefImpl Sec) const override;
64  bool isSectionData(DataRefImpl Sec) const override;
65  bool isSectionBSS(DataRefImpl Sec) const override;
66  bool isSectionVirtual(DataRefImpl Sec) const override;
67  bool isSectionBitcode(DataRefImpl Sec) const override;
68  relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
69  relocation_iterator section_rel_end(DataRefImpl Sec) const override;
70  section_iterator getRelocatedSection(DataRefImpl Sec) const override;
71
72  // Overrides from RelocationRef.
73  void moveRelocationNext(DataRefImpl &Rel) const override;
74  uint64_t getRelocationOffset(DataRefImpl Rel) const override;
75  symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
76  uint64_t getRelocationType(DataRefImpl Rel) const override;
77  void getRelocationTypeName(DataRefImpl Rel,
78                             SmallVectorImpl<char> &Result) const override;
79
80  section_iterator section_begin() const override;
81  section_iterator section_end() const override;
82  uint8_t getBytesInAddress() const override;
83  StringRef getFileFormatName() const override;
84  unsigned getArch() const override;
85  SubtargetFeatures getFeatures() const override;
86  bool isRelocatableObject() const override;
87
88private:
89  const uint8_t *getPtr(size_t Offset) const;
90  Error parseUserSection(wasm::WasmSection &Sec, const uint8_t *Ptr,
91                         size_t Length);
92
93  wasm::WasmObjectHeader Header;
94  std::vector<wasm::WasmSection> Sections;
95};
96}
97}
98
99#endif
100