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
124
125
126
127
128
129
130
131
|
//===-- MCAsmInfo.cpp - Asm Info -------------------------------------------==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines target asm properties related what form asm statements
// should take.
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Dwarf.h"
#include <cctype>
#include <cstring>
using namespace llvm;
MCAsmInfo::MCAsmInfo() {
PointerSize = 4;
CalleeSaveStackSlotSize = 4;
IsLittleEndian = true;
StackGrowsUp = false;
HasSubsectionsViaSymbols = false;
HasMachoZeroFillDirective = false;
HasMachoTBSSDirective = false;
HasStaticCtorDtorReferenceInStaticMode = false;
LinkerRequiresNonEmptyDwarfLines = false;
MaxInstLength = 4;
MinInstAlignment = 1;
DollarIsPC = false;
SeparatorString = ";";
CommentString = "#";
LabelSuffix = ":";
DebugLabelSuffix = ":";
PrivateGlobalPrefix = "L";
LinkerPrivateGlobalPrefix = "";
InlineAsmStart = "APP";
InlineAsmEnd = "NO_APP";
Code16Directive = ".code16";
Code32Directive = ".code32";
Code64Directive = ".code64";
AssemblerDialect = 0;
AllowAtInName = false;
UseDataRegionDirectives = false;
ZeroDirective = "\t.zero\t";
AsciiDirective = "\t.ascii\t";
AscizDirective = "\t.asciz\t";
Data8bitsDirective = "\t.byte\t";
Data16bitsDirective = "\t.short\t";
Data32bitsDirective = "\t.long\t";
Data64bitsDirective = "\t.quad\t";
SunStyleELFSectionSwitchSyntax = false;
UsesELFSectionDirectiveForBSS = false;
AlignmentIsInBytes = true;
TextAlignFillValue = 0;
GPRel64Directive = nullptr;
GPRel32Directive = nullptr;
GlobalDirective = "\t.globl\t";
HasSetDirective = true;
HasAggressiveSymbolFolding = true;
COMMDirectiveAlignmentIsInBytes = true;
LCOMMDirectiveAlignmentType = LCOMM::NoAlignment;
HasDotTypeDotSizeDirective = true;
HasSingleParameterDotFile = true;
HasIdentDirective = false;
HasNoDeadStrip = false;
WeakRefDirective = nullptr;
HasWeakDefDirective = false;
HasWeakDefCanBeHiddenDirective = false;
HasLinkOnceDirective = false;
HiddenVisibilityAttr = MCSA_Hidden;
HiddenDeclarationVisibilityAttr = MCSA_Hidden;
ProtectedVisibilityAttr = MCSA_Protected;
HasLEB128 = false;
SupportsDebugInformation = false;
ExceptionsType = ExceptionHandling::None;
DwarfUsesRelocationsAcrossSections = true;
DwarfFDESymbolsUseAbsDiff = false;
DwarfRegNumForCFI = false;
NeedsDwarfSectionOffsetDirective = false;
UseParensForSymbolVariant = false;
// FIXME: Clang's logic should be synced with the logic used to initialize
// this member and the two implementations should be merged.
// For reference:
// - Solaris always enables the integrated assembler by default
// - SparcELFMCAsmInfo and X86ELFMCAsmInfo are handling this case
// - Windows always enables the integrated assembler by default
// - MCAsmInfoCOFF is handling this case, should it be MCAsmInfoMicrosoft?
// - MachO targets always enables the integrated assembler by default
// - MCAsmInfoDarwin is handling this case
// - Generic_GCC toolchains enable the integrated assembler on a per
// architecture basis.
// - The target subclasses for AArch64, ARM, and X86 handle these cases
UseIntegratedAssembler = false;
CompressDebugSections = false;
}
MCAsmInfo::~MCAsmInfo() {
}
const MCExpr *
MCAsmInfo::getExprForPersonalitySymbol(const MCSymbol *Sym,
unsigned Encoding,
MCStreamer &Streamer) const {
return getExprForFDESymbol(Sym, Encoding, Streamer);
}
const MCExpr *
MCAsmInfo::getExprForFDESymbol(const MCSymbol *Sym,
unsigned Encoding,
MCStreamer &Streamer) const {
if (!(Encoding & dwarf::DW_EH_PE_pcrel))
return MCSymbolRefExpr::Create(Sym, Streamer.getContext());
MCContext &Context = Streamer.getContext();
const MCExpr *Res = MCSymbolRefExpr::Create(Sym, Context);
MCSymbol *PCSym = Context.CreateTempSymbol();
Streamer.EmitLabel(PCSym);
const MCExpr *PC = MCSymbolRefExpr::Create(PCSym, Context);
return MCBinaryExpr::CreateSub(Res, PC, Context);
}
|
