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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
//===- lib/MC/MCSectionELF.cpp - ELF Code Section Representation ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCContext.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetAsmInfo.h"
using namespace llvm;
MCSectionELF *MCSectionELF::
Create(const StringRef &Section, unsigned Type, unsigned Flags,
SectionKind K, bool hasCrazyBSS, bool isExplicit, MCContext &Ctx) {
return new
(Ctx) MCSectionELF(Section, Type, Flags, K, hasCrazyBSS, isExplicit);
}
// ShouldOmitSectionDirective - Decides whether a '.section' directive
// should be printed before the section name
bool MCSectionELF::ShouldOmitSectionDirective(const char *Name) const {
// PPC/Linux doesn't support the .bss directive, it needs .section .bss.
// FIXME: Does .section .bss/.data/.text work everywhere??
if ((!HasCrazyBSS && strncmp(Name, ".bss", 4) == 0) ||
strncmp(Name, ".text", 5) == 0 ||
strncmp(Name, ".data", 5) == 0)
return true;
return false;
}
// ShouldPrintSectionType - Only prints the section type if supported
bool MCSectionELF::ShouldPrintSectionType(unsigned Ty) const {
if (IsExplicit && !(Ty == SHT_NOBITS || Ty == SHT_PROGBITS))
return false;
return true;
}
void MCSectionELF::PrintSwitchToSection(const TargetAsmInfo &TAI,
raw_ostream &OS) const {
if (ShouldOmitSectionDirective(SectionName.c_str())) {
OS << '\t' << getSectionName() << '\n';
return;
}
OS << "\t.section\t" << getSectionName();
// Handle the weird solaris syntax if desired.
if (TAI.usesSunStyleELFSectionSwitchSyntax() &&
!(Flags & MCSectionELF::SHF_MERGE)) {
if (Flags & MCSectionELF::SHF_ALLOC)
OS << ",#alloc";
if (Flags & MCSectionELF::SHF_EXECINSTR)
OS << ",#execinstr";
if (Flags & MCSectionELF::SHF_WRITE)
OS << ",#write";
if (Flags & MCSectionELF::SHF_TLS)
OS << ",#tls";
} else {
OS << ",\"";
if (Flags & MCSectionELF::SHF_ALLOC)
OS << 'a';
if (Flags & MCSectionELF::SHF_EXECINSTR)
OS << 'x';
if (Flags & MCSectionELF::SHF_WRITE)
OS << 'w';
if (Flags & MCSectionELF::SHF_MERGE)
OS << 'M';
if (Flags & MCSectionELF::SHF_STRINGS)
OS << 'S';
if (Flags & MCSectionELF::SHF_TLS)
OS << 'T';
OS << '"';
if (ShouldPrintSectionType(Type)) {
OS << ',';
// If comment string is '@', e.g. as on ARM - use '%' instead
if (TAI.getCommentString()[0] == '@')
OS << '%';
else
OS << '@';
if (Type == MCSectionELF::SHT_INIT_ARRAY)
OS << "init_array";
else if (Type == MCSectionELF::SHT_FINI_ARRAY)
OS << "fini_array";
else if (Type == MCSectionELF::SHT_PREINIT_ARRAY)
OS << "preinit_array";
else if (Type == MCSectionELF::SHT_NOBITS)
OS << "nobits";
else if (Type == MCSectionELF::SHT_PROGBITS)
OS << "progbits";
if (getKind().isMergeable1ByteCString()) {
OS << ",1";
} else if (getKind().isMergeable2ByteCString()) {
OS << ",2";
} else if (getKind().isMergeable4ByteCString() ||
getKind().isMergeableConst4()) {
OS << ",4";
} else if (getKind().isMergeableConst8()) {
OS << ",8";
} else if (getKind().isMergeableConst16()) {
OS << ",16";
}
}
}
OS << '\n';
}
|
