/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/include/llvm/MC/MCSectionELF.h
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1 | | //===- MCSectionELF.h - ELF 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 MCSectionELF class. |
11 | | // |
12 | | //===----------------------------------------------------------------------===// |
13 | | |
14 | | #ifndef LLVM_MC_MCSECTIONELF_H |
15 | | #define LLVM_MC_MCSECTIONELF_H |
16 | | |
17 | | #include "llvm/ADT/StringRef.h" |
18 | | #include "llvm/MC/MCSection.h" |
19 | | #include "llvm/MC/MCSymbolELF.h" |
20 | | #include "llvm/MC/SectionKind.h" |
21 | | |
22 | | namespace llvm { |
23 | | |
24 | | class MCSymbol; |
25 | | |
26 | | /// This represents a section on linux, lots of unix variants and some bare |
27 | | /// metal systems. |
28 | | class MCSectionELF final : public MCSection { |
29 | | /// This is the name of the section. The referenced memory is owned by |
30 | | /// TargetLoweringObjectFileELF's ELFUniqueMap. |
31 | | StringRef SectionName; |
32 | | |
33 | | /// This is the sh_type field of a section, drawn from the enums below. |
34 | | unsigned Type; |
35 | | |
36 | | /// This is the sh_flags field of a section, drawn from the enums below. |
37 | | unsigned Flags; |
38 | | |
39 | | unsigned UniqueID; |
40 | | |
41 | | /// The size of each entry in this section. This size only makes sense for |
42 | | /// sections that contain fixed-sized entries. If a section does not contain |
43 | | /// fixed-sized entries 'EntrySize' will be 0. |
44 | | unsigned EntrySize; |
45 | | |
46 | | const MCSymbolELF *Group; |
47 | | |
48 | | /// sh_info for SHF_LINK_ORDER (can be null). |
49 | | const MCSymbol *AssociatedSymbol; |
50 | | |
51 | | private: |
52 | | friend class MCContext; |
53 | | |
54 | | MCSectionELF(StringRef Section, unsigned type, unsigned flags, SectionKind K, |
55 | | unsigned entrySize, const MCSymbolELF *group, unsigned UniqueID, |
56 | | MCSymbol *Begin, const MCSymbolELF *AssociatedSymbol) |
57 | | : MCSection(SV_ELF, K, Begin), SectionName(Section), Type(type), |
58 | | Flags(flags), UniqueID(UniqueID), EntrySize(entrySize), Group(group), |
59 | 1.15M | AssociatedSymbol(AssociatedSymbol) { |
60 | 1.15M | if (Group) |
61 | 340 | Group->setIsSignature(); |
62 | 1.15M | } |
63 | | |
64 | 5 | void setSectionName(StringRef Name) { SectionName = Name; } |
65 | | |
66 | | public: |
67 | | ~MCSectionELF(); |
68 | | |
69 | | /// Decides whether a '.section' directive should be printed before the |
70 | | /// section name |
71 | | bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const; |
72 | | |
73 | 1.14M | StringRef getSectionName() const { return SectionName; } |
74 | 2.04M | unsigned getType() const { return Type; } |
75 | 717k | unsigned getFlags() const { return Flags; } |
76 | 344k | unsigned getEntrySize() const { return EntrySize; } |
77 | 4 | void setFlags(unsigned F) { Flags = F; } |
78 | 678k | const MCSymbolELF *getGroup() const { return Group; } |
79 | | |
80 | | void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T, |
81 | | raw_ostream &OS, |
82 | | const MCExpr *Subsection) const override; |
83 | | bool UseCodeAlign() const override; |
84 | | bool isVirtualSection() const override; |
85 | | |
86 | 144k | bool isUnique() const { return UniqueID != ~0U; } |
87 | 765 | unsigned getUniqueID() const { return UniqueID; } |
88 | | |
89 | 5.13k | const MCSection *getAssociatedSection() const { return &AssociatedSymbol->getSection(); } |
90 | 207 | const MCSymbol *getAssociatedSymbol() const { return AssociatedSymbol; } |
91 | | |
92 | 1 | static bool classof(const MCSection *S) { |
93 | 1 | return S->getVariant() == SV_ELF; |
94 | 1 | } |
95 | | }; |
96 | | |
97 | | } // end namespace llvm |
98 | | |
99 | | #endif // LLVM_MC_MCSECTIONELF_H |