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
|
//===-- X86MCAsmInfo.cpp - X86 asm properties -----------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the declarations of the X86MCAsmInfo properties.
//
//===----------------------------------------------------------------------===//
#include "X86MCAsmInfo.h"
#include "X86TargetMachine.h"
#include "llvm/ADT/Triple.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/Support/CommandLine.h"
using namespace llvm;
enum AsmWriterFlavorTy {
// Note: This numbering has to match the GCC assembler dialects for inline
// asm alternatives to work right.
ATT = 0, Intel = 1
};
static cl::opt<AsmWriterFlavorTy>
AsmWriterFlavor("x86-asm-syntax", cl::init(ATT),
cl::desc("Choose style of code to emit from X86 backend:"),
cl::values(clEnumValN(ATT, "att", "Emit AT&T-style assembly"),
clEnumValN(Intel, "intel", "Emit Intel-style assembly"),
clEnumValEnd));
static const char *const x86_asm_table[] = {
"{si}", "S",
"{di}", "D",
"{ax}", "a",
"{cx}", "c",
"{memory}", "memory",
"{flags}", "",
"{dirflag}", "",
"{fpsr}", "",
"{cc}", "cc",
0,0};
X86MCAsmInfoDarwin::X86MCAsmInfoDarwin(const Triple &Triple) {
AsmTransCBE = x86_asm_table;
AssemblerDialect = AsmWriterFlavor;
bool is64Bit = Triple.getArch() == Triple::x86_64;
TextAlignFillValue = 0x90;
if (!is64Bit)
Data64bitsDirective = 0; // we can't emit a 64-bit unit
// Use ## as a comment string so that .s files generated by llvm can go
// through the GCC preprocessor without causing an error. This is needed
// because "clang foo.s" runs the C preprocessor, which is usually reserved
// for .S files on other systems. Perhaps this is because the file system
// wasn't always case preserving or something.
CommentString = "##";
PCSymbol = ".";
SupportsDebugInformation = true;
DwarfUsesInlineInfoSection = true;
// Exceptions handling
ExceptionsType = ExceptionHandling::Dwarf;
AbsoluteEHSectionOffsets = false;
}
X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &Triple) {
AsmTransCBE = x86_asm_table;
AssemblerDialect = AsmWriterFlavor;
TextAlignFillValue = 0x90;
PrivateGlobalPrefix = ".L";
WeakRefDirective = "\t.weak\t";
PCSymbol = ".";
// Set up DWARF directives
HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
// Debug Information
AbsoluteDebugSectionOffsets = true;
SupportsDebugInformation = true;
// Exceptions handling
ExceptionsType = ExceptionHandling::Dwarf;
AbsoluteEHSectionOffsets = false;
}
MCSection *X86ELFMCAsmInfo::getNonexecutableStackSection(MCContext &Ctx) const {
return MCSectionELF::Create(".note.GNU-stack", MCSectionELF::SHT_PROGBITS,
0, SectionKind::getMetadata(), false, Ctx);
}
X86MCAsmInfoCOFF::X86MCAsmInfoCOFF(const Triple &Triple) {
AsmTransCBE = x86_asm_table;
AssemblerDialect = AsmWriterFlavor;
TextAlignFillValue = 0x90;
}
|
