1 //===-- ARMMCAsmInfo.cpp - ARM asm properties -----------------------------===//
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 contains the declarations of the ARMMCAsmInfo properties.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "ARMMCAsmInfo.h"
15 #include "llvm/ADT/Triple.h"
16 #include "llvm/Support/CommandLine.h"
17 
18 using namespace llvm;
19 
anchor()20 void ARMMCAsmInfoDarwin::anchor() { }
21 
ARMMCAsmInfoDarwin(const Triple & TheTriple)22 ARMMCAsmInfoDarwin::ARMMCAsmInfoDarwin(const Triple &TheTriple) {
23   if ((TheTriple.getArch() == Triple::armeb) ||
24       (TheTriple.getArch() == Triple::thumbeb))
25     IsLittleEndian = false;
26 
27   Data64bitsDirective = nullptr;
28   CommentString = "@";
29   Code16Directive = ".code\t16";
30   Code32Directive = ".code\t32";
31   UseDataRegionDirectives = true;
32 
33   SupportsDebugInformation = true;
34 
35   // Exceptions handling
36   ExceptionsType = TheTriple.isOSDarwin() && !TheTriple.isWatchOS()
37                        ? ExceptionHandling::SjLj
38                        : ExceptionHandling::DwarfCFI;
39 
40   UseIntegratedAssembler = true;
41 }
42 
anchor()43 void ARMELFMCAsmInfo::anchor() { }
44 
ARMELFMCAsmInfo(const Triple & TheTriple)45 ARMELFMCAsmInfo::ARMELFMCAsmInfo(const Triple &TheTriple) {
46   if ((TheTriple.getArch() == Triple::armeb) ||
47       (TheTriple.getArch() == Triple::thumbeb))
48     IsLittleEndian = false;
49 
50   // ".comm align is in bytes but .align is pow-2."
51   AlignmentIsInBytes = false;
52 
53   Data64bitsDirective = nullptr;
54   CommentString = "@";
55   Code16Directive = ".code\t16";
56   Code32Directive = ".code\t32";
57 
58   SupportsDebugInformation = true;
59 
60   // Exceptions handling
61   switch (TheTriple.getOS()) {
62   case Triple::Bitrig:
63   case Triple::NetBSD:
64     ExceptionsType = ExceptionHandling::DwarfCFI;
65     break;
66   default:
67     ExceptionsType = ExceptionHandling::ARM;
68     break;
69   }
70 
71   // foo(plt) instead of foo@plt
72   UseParensForSymbolVariant = true;
73 
74   UseIntegratedAssembler = true;
75 }
76 
setUseIntegratedAssembler(bool Value)77 void ARMELFMCAsmInfo::setUseIntegratedAssembler(bool Value) {
78   UseIntegratedAssembler = Value;
79   if (!UseIntegratedAssembler) {
80     // gas doesn't handle VFP register names in cfi directives,
81     // so don't use register names with external assembler.
82     // See https://sourceware.org/bugzilla/show_bug.cgi?id=16694
83     DwarfRegNumForCFI = true;
84   }
85 }
86 
anchor()87 void ARMCOFFMCAsmInfoMicrosoft::anchor() { }
88 
ARMCOFFMCAsmInfoMicrosoft()89 ARMCOFFMCAsmInfoMicrosoft::ARMCOFFMCAsmInfoMicrosoft() {
90   AlignmentIsInBytes = false;
91 
92   PrivateGlobalPrefix = "$M";
93   PrivateLabelPrefix = "$M";
94 }
95 
anchor()96 void ARMCOFFMCAsmInfoGNU::anchor() { }
97 
ARMCOFFMCAsmInfoGNU()98 ARMCOFFMCAsmInfoGNU::ARMCOFFMCAsmInfoGNU() {
99   AlignmentIsInBytes = false;
100   HasSingleParameterDotFile = true;
101 
102   CommentString = "@";
103   Code16Directive = ".code\t16";
104   Code32Directive = ".code\t32";
105   PrivateGlobalPrefix = ".L";
106   PrivateLabelPrefix = ".L";
107 
108   SupportsDebugInformation = true;
109   ExceptionsType = ExceptionHandling::None;
110   UseParensForSymbolVariant = true;
111 
112   UseIntegratedAssembler = false;
113   DwarfRegNumForCFI = true;
114 }
115 
116