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/Support/CommandLine.h"
16 #include "llvm/ADT/Triple.h"
17 
18 using namespace llvm;
19 
20 void ARMMCAsmInfoDarwin::anchor() { }
21 
22 ARMMCAsmInfoDarwin::ARMMCAsmInfoDarwin(StringRef TT) {
23   Triple TheTriple(TT);
24   if ((TheTriple.getArch() == Triple::armeb) ||
25       (TheTriple.getArch() == Triple::thumbeb))
26     IsLittleEndian = false;
27 
28   Data64bitsDirective = nullptr;
29   CommentString = "@";
30   Code16Directive = ".code\t16";
31   Code32Directive = ".code\t32";
32   UseDataRegionDirectives = true;
33 
34   SupportsDebugInformation = true;
35 
36   // Exceptions handling
37   ExceptionsType = ExceptionHandling::SjLj;
38 
39   UseIntegratedAssembler = true;
40 }
41 
42 void ARMELFMCAsmInfo::anchor() { }
43 
44 ARMELFMCAsmInfo::ARMELFMCAsmInfo(StringRef TT) {
45   Triple TheTriple(TT);
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::NetBSD:
63     ExceptionsType = ExceptionHandling::DwarfCFI;
64     break;
65   default:
66     ExceptionsType = ExceptionHandling::ARM;
67     break;
68   }
69 
70   // foo(plt) instead of foo@plt
71   UseParensForSymbolVariant = true;
72 
73   UseIntegratedAssembler = true;
74 }
75 
76 void ARMELFMCAsmInfo::setUseIntegratedAssembler(bool Value) {
77   UseIntegratedAssembler = Value;
78   if (!UseIntegratedAssembler) {
79     // gas doesn't handle VFP register names in cfi directives,
80     // so don't use register names with external assembler.
81     // See https://sourceware.org/bugzilla/show_bug.cgi?id=16694
82     DwarfRegNumForCFI = true;
83   }
84 }
85 
86 void ARMCOFFMCAsmInfoMicrosoft::anchor() { }
87 
88 ARMCOFFMCAsmInfoMicrosoft::ARMCOFFMCAsmInfoMicrosoft() {
89   AlignmentIsInBytes = false;
90 
91   PrivateGlobalPrefix = "$M";
92 }
93 
94 void ARMCOFFMCAsmInfoGNU::anchor() { }
95 
96 ARMCOFFMCAsmInfoGNU::ARMCOFFMCAsmInfoGNU() {
97   AlignmentIsInBytes = false;
98   HasSingleParameterDotFile = true;
99 
100   CommentString = "@";
101   Code16Directive = ".code\t16";
102   Code32Directive = ".code\t32";
103   PrivateGlobalPrefix = ".L";
104 
105   SupportsDebugInformation = true;
106   ExceptionsType = ExceptionHandling::None;
107   UseParensForSymbolVariant = true;
108 
109   UseIntegratedAssembler = false;
110   DwarfRegNumForCFI = true;
111 }
112 
113