/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/include/llvm/MC/MCSectionWasm.h
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1 | | //===- MCSectionWasm.h - Wasm Machine Code Sections -------------*- 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 MCSectionWasm class. |
11 | | // |
12 | | //===----------------------------------------------------------------------===// |
13 | | |
14 | | #ifndef LLVM_MC_MCSECTIONWASM_H |
15 | | #define LLVM_MC_MCSECTIONWASM_H |
16 | | |
17 | | #include "llvm/ADT/Twine.h" |
18 | | #include "llvm/MC/MCSection.h" |
19 | | #include "llvm/MC/MCSymbolWasm.h" |
20 | | #include "llvm/Support/Debug.h" |
21 | | #include "llvm/Support/raw_ostream.h" |
22 | | |
23 | | namespace llvm { |
24 | | |
25 | | class MCSymbol; |
26 | | |
27 | | /// This represents a section on wasm. |
28 | | class MCSectionWasm final : public MCSection { |
29 | | private: |
30 | | /// This is the name of the section. The referenced memory is owned by |
31 | | /// TargetLoweringObjectFileWasm's WasmUniqueMap. |
32 | | StringRef SectionName; |
33 | | |
34 | | /// This is the type of the section, from the enums in BinaryFormat/Wasm.h |
35 | | unsigned Type; |
36 | | |
37 | | unsigned UniqueID; |
38 | | |
39 | | const MCSymbolWasm *Group; |
40 | | |
41 | | // The offset of the MC function/data section in the wasm code/data section. |
42 | | // For data relocations the offset is relative to start of the data payload |
43 | | // itself and does not include the size of the section header. |
44 | | uint64_t SectionOffset; |
45 | | |
46 | | // For data sections, this is the offset of the corresponding wasm data |
47 | | // segment |
48 | | uint64_t MemoryOffset; |
49 | | |
50 | | friend class MCContext; |
51 | | MCSectionWasm(StringRef Section, unsigned type, SectionKind K, |
52 | | const MCSymbolWasm *group, unsigned UniqueID, MCSymbol *Begin) |
53 | | : MCSection(SV_Wasm, K, Begin), SectionName(Section), Type(type), |
54 | 0 | UniqueID(UniqueID), Group(group), SectionOffset(0) { |
55 | 0 | assert(type == wasm::WASM_SEC_CODE || type == wasm::WASM_SEC_DATA); |
56 | 0 | } |
57 | | |
58 | 0 | void setSectionName(StringRef Name) { SectionName = Name; } |
59 | | |
60 | | public: |
61 | | ~MCSectionWasm(); |
62 | | |
63 | | /// Decides whether a '.section' directive should be printed before the |
64 | | /// section name |
65 | | bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const; |
66 | | |
67 | 0 | StringRef getSectionName() const { return SectionName; } |
68 | 0 | unsigned getType() const { return Type; } |
69 | 0 | const MCSymbolWasm *getGroup() const { return Group; } |
70 | | |
71 | | void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T, |
72 | | raw_ostream &OS, |
73 | | const MCExpr *Subsection) const override; |
74 | | bool UseCodeAlign() const override; |
75 | | bool isVirtualSection() const override; |
76 | | |
77 | 0 | bool isUnique() const { return UniqueID != ~0U; } |
78 | 0 | unsigned getUniqueID() const { return UniqueID; } |
79 | | |
80 | 0 | uint64_t getSectionOffset() const { return SectionOffset; } |
81 | 0 | void setSectionOffset(uint64_t Offset) { SectionOffset = Offset; } |
82 | | |
83 | 0 | uint32_t getMemoryOffset() const { return MemoryOffset; } |
84 | 0 | void setMemoryOffset(uint32_t Offset) { MemoryOffset = Offset; } |
85 | | |
86 | 0 | static bool classof(const MCSection *S) { return S->getVariant() == SV_Wasm; } |
87 | | }; |
88 | | |
89 | | } // end namespace llvm |
90 | | |
91 | | #endif |