1 //===-- ARMMCAsmInfo.cpp - ARM asm properties -----------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file contains the declarations of the ARMMCAsmInfo properties. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "ARMMCAsmInfo.h" 14 #include "llvm/TargetParser/Triple.h" 15 16 using namespace llvm; 17 18 void ARMMCAsmInfoDarwin::anchor() { } 19 20 ARMMCAsmInfoDarwin::ARMMCAsmInfoDarwin(const Triple &TheTriple) { 21 if ((TheTriple.getArch() == Triple::armeb) || 22 (TheTriple.getArch() == Triple::thumbeb)) 23 IsLittleEndian = false; 24 25 Data64bitsDirective = nullptr; 26 CommentString = "@"; 27 Code16Directive = ".code\t16"; 28 Code32Directive = ".code\t32"; 29 UseDataRegionDirectives = true; 30 31 SupportsDebugInformation = true; 32 33 // Conditional Thumb 4-byte instructions can have an implicit IT. 34 MaxInstLength = 6; 35 36 // Exceptions handling 37 ExceptionsType = (TheTriple.isOSDarwin() && !TheTriple.isWatchABI()) 38 ? ExceptionHandling::SjLj 39 : ExceptionHandling::DwarfCFI; 40 } 41 42 void ARMELFMCAsmInfo::anchor() { } 43 44 ARMELFMCAsmInfo::ARMELFMCAsmInfo(const Triple &TheTriple) { 45 if ((TheTriple.getArch() == Triple::armeb) || 46 (TheTriple.getArch() == Triple::thumbeb)) 47 IsLittleEndian = false; 48 49 // ".comm align is in bytes but .align is pow-2." 50 AlignmentIsInBytes = false; 51 52 Data64bitsDirective = nullptr; 53 CommentString = "@"; 54 Code16Directive = ".code\t16"; 55 Code32Directive = ".code\t32"; 56 57 SupportsDebugInformation = true; 58 59 // Conditional Thumb 4-byte instructions can have an implicit IT. 60 MaxInstLength = 6; 61 62 // Exceptions handling 63 switch (TheTriple.getOS()) { 64 case Triple::NetBSD: 65 ExceptionsType = ExceptionHandling::DwarfCFI; 66 break; 67 default: 68 ExceptionsType = ExceptionHandling::ARM; 69 break; 70 } 71 72 // foo(plt) instead of foo@plt 73 UseParensForSymbolVariant = 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 SupportsDebugInformation = true; 91 ExceptionsType = ExceptionHandling::WinEH; 92 WinEHEncodingType = WinEH::EncodingType::Itanium; 93 PrivateGlobalPrefix = "$M"; 94 PrivateLabelPrefix = "$M"; 95 CommentString = "@"; 96 97 // Conditional Thumb 4-byte instructions can have an implicit IT. 98 MaxInstLength = 6; 99 } 100 101 void ARMCOFFMCAsmInfoGNU::anchor() { } 102 103 ARMCOFFMCAsmInfoGNU::ARMCOFFMCAsmInfoGNU() { 104 AlignmentIsInBytes = false; 105 HasSingleParameterDotFile = true; 106 107 CommentString = "@"; 108 Code16Directive = ".code\t16"; 109 Code32Directive = ".code\t32"; 110 PrivateGlobalPrefix = ".L"; 111 PrivateLabelPrefix = ".L"; 112 113 SupportsDebugInformation = true; 114 ExceptionsType = ExceptionHandling::WinEH; 115 WinEHEncodingType = WinEH::EncodingType::Itanium; 116 UseParensForSymbolVariant = true; 117 118 DwarfRegNumForCFI = false; 119 120 // Conditional Thumb 4-byte instructions can have an implicit IT. 121 MaxInstLength = 6; 122 } 123