1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
#pragma once
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//===- MCSectionELF.h - ELF Machine Code Sections ---------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file declares the MCSectionELF class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCSECTIONELF_H
#define LLVM_MC_MCSECTIONELF_H
#include "llvm/ADT/StringRef.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSymbolELF.h"
#include "llvm/MC/SectionKind.h"
namespace llvm {
class MCSymbol;
/// This represents a section on linux, lots of unix variants and some bare
/// metal systems.
class MCSectionELF final : public MCSection {
/// This is the sh_type field of a section, drawn from the enums below.
unsigned Type;
/// This is the sh_flags field of a section, drawn from the enums below.
unsigned Flags;
unsigned UniqueID;
/// The size of each entry in this section. This size only makes sense for
/// sections that contain fixed-sized entries. If a section does not contain
/// fixed-sized entries 'EntrySize' will be 0.
unsigned EntrySize;
const MCSymbolELF *Group;
/// Used by SHF_LINK_ORDER. If non-null, the sh_link field will be set to the
/// section header index of the section where LinkedToSym is defined.
const MCSymbol *LinkedToSym;
private:
friend class MCContext;
// The storage of Name is owned by MCContext's ELFUniquingMap.
MCSectionELF(StringRef Name, unsigned type, unsigned flags, SectionKind K,
unsigned entrySize, const MCSymbolELF *group, unsigned UniqueID,
MCSymbol *Begin, const MCSymbolELF *LinkedToSym)
: MCSection(SV_ELF, Name, K, Begin), Type(type), Flags(flags),
UniqueID(UniqueID), EntrySize(entrySize), Group(group),
LinkedToSym(LinkedToSym) {
if (Group)
Group->setIsSignature();
}
// TODO Delete after we stop supporting generation of GNU-style .zdebug_*
// sections.
void setSectionName(StringRef Name) { this->Name = Name; }
public:
/// Decides whether a '.section' directive should be printed before the
/// section name
bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const;
unsigned getType() const { return Type; }
unsigned getFlags() const { return Flags; }
unsigned getEntrySize() const { return EntrySize; }
void setFlags(unsigned F) { Flags = F; }
const MCSymbolELF *getGroup() const { return Group; }
void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
raw_ostream &OS,
const MCExpr *Subsection) const override;
bool UseCodeAlign() const override;
bool isVirtualSection() const override;
StringRef getVirtualSectionKind() const override;
bool isUnique() const { return UniqueID != NonUniqueID; }
unsigned getUniqueID() const { return UniqueID; }
const MCSection *getLinkedToSection() const {
return &LinkedToSym->getSection();
}
const MCSymbol *getLinkedToSymbol() const { return LinkedToSym; }
static bool classof(const MCSection *S) {
return S->getVariant() == SV_ELF;
}
};
} // end namespace llvm
#endif // LLVM_MC_MCSECTIONELF_H
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
|
