TargetLoweringObjectFile.cpp revision 11e9657eeb76dff6baaab1cbac0b1fb7e1abb439
1f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner//===-- llvm/Target/TargetLoweringObjectFile.cpp - Object File Info -------===// 2f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// 3f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// The LLVM Compiler Infrastructure 4f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// 5f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// This file is distributed under the University of Illinois Open Source 6f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// License. See LICENSE.TXT for details. 7f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// 8f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner//===----------------------------------------------------------------------===// 9f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// 10f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// This file implements classes used to handle lowerings specific to common 11f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// object file formats. 12f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// 13f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner//===----------------------------------------------------------------------===// 14f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 15f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner#include "llvm/Target/TargetLoweringObjectFile.h" 16f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner#include "llvm/Constants.h" 17f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner#include "llvm/DerivedTypes.h" 18f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner#include "llvm/GlobalVariable.h" 19a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattner#include "llvm/MC/MCContext.h" 20a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattner#include "llvm/MC/MCSection.h" 21f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner#include "llvm/Target/TargetMachine.h" 22f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner#include "llvm/Target/TargetData.h" 23f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner#include "llvm/Target/TargetOptions.h" 24a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattner#include "llvm/Support/Mangler.h" 25f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner#include "llvm/ADT/StringExtras.h" 26f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattnerusing namespace llvm; 27f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 28f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner//===----------------------------------------------------------------------===// 29f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// Generic Code 30f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner//===----------------------------------------------------------------------===// 31f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 32a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris LattnerTargetLoweringObjectFile::TargetLoweringObjectFile() : Ctx(0) { 33f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner TextSection = 0; 34f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner DataSection = 0; 35824583844a8f334dd261894a3fac7ad476531667Chris Lattner BSSSection = 0; 36f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner ReadOnlySection = 0; 3780ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner StaticCtorSection = 0; 3880ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner StaticDtorSection = 0; 39d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner LSDASection = 0; 4035039ac24163e99cfab161620a9fb41f944a63d5Chris Lattner EHFrameSection = 0; 4118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner 4218a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfAbbrevSection = 0; 4318a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfInfoSection = 0; 4418a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfLineSection = 0; 4518a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfFrameSection = 0; 4618a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfPubNamesSection = 0; 4718a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfPubTypesSection = 0; 4818a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfDebugInlineSection = 0; 4918a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfStrSection = 0; 5018a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfLocSection = 0; 5118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfARangesSection = 0; 5218a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfRangesSection = 0; 5318a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfMacroInfoSection = 0; 54f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 55f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 56f0144127b98425d214e59e4a1a4b342b78e3642bChris LattnerTargetLoweringObjectFile::~TargetLoweringObjectFile() { 57f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 58f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 59f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattnerstatic bool isSuitableForBSS(const GlobalVariable *GV) { 60f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Constant *C = GV->getInitializer(); 61f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 62f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Must have zero initializer. 63f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (!C->isNullValue()) 64f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return false; 65f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 66f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Leave constant zeros in readonly constant sections, so they can be shared. 67f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (GV->isConstant()) 68f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return false; 69f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 70f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // If the global has an explicit section specified, don't put it in BSS. 71f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (!GV->getSection().empty()) 72f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return false; 73f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 74f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // If -nozero-initialized-in-bss is specified, don't ever use BSS. 75f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (NoZerosInBSS) 76f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return false; 77f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 78f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Otherwise, put it in BSS! 79f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return true; 80f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 81f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 82f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattnerstatic bool isConstantString(const Constant *C) { 83f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // First check: is we have constant array of i8 terminated with zero 84f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner const ConstantArray *CVA = dyn_cast<ConstantArray>(C); 85f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Check, if initializer is a null-terminated string 86f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (CVA && CVA->isCString()) 87f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return true; 88f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 89f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Another possibility: [1 x i8] zeroinitializer 90f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (isa<ConstantAggregateZero>(C)) 91f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (const ArrayType *Ty = dyn_cast<ArrayType>(C->getType())) 92f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return (Ty->getElementType() == Type::Int8Ty && 93f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Ty->getNumElements() == 1); 94f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 95f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return false; 96f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 97f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 98968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner/// SectionKindForGlobal - This is a top-level target-independent classifier for 99968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner/// a global variable. Given an global variable and information from TM, it 100968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner/// classifies the global in a variety of ways that make various target 101968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner/// implementations simpler. The target implementation is free to ignore this 102968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner/// extra info of course. 103968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattnerstatic SectionKind SectionKindForGlobal(const GlobalValue *GV, 104968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner const TargetMachine &TM) { 105f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Reloc::Model ReloModel = TM.getRelocationModel(); 106f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 107f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Early exit - functions should be always in text sections. 108f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV); 109f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (GVar == 0) 1102798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getText(); 111f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 112f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 113f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Handle thread-local data first. 114f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (GVar->isThreadLocal()) { 115f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (isSuitableForBSS(GVar)) 1162798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getThreadBSS(); 1172798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getThreadData(); 118f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 119f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 120f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Variable can be easily put to BSS section. 121f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (isSuitableForBSS(GVar)) 1222798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getBSS(); 123f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 124f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Constant *C = GVar->getInitializer(); 125f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 126f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // If the global is marked constant, we can put it into a mergable section, 127f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // a mergable string section, or general .data if it contains relocations. 128f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (GVar->isConstant()) { 129f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // If the initializer for the global contains something that requires a 130f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // relocation, then we may have to drop this into a wriable data section 131f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // even though it is marked const. 132f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner switch (C->getRelocationInfo()) { 133f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner default: llvm_unreachable("unknown relocation info kind"); 134f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner case Constant::NoRelocation: 135f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // If initializer is a null-terminated string, put it in a "cstring" 136f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // section if the target has it. 137f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (isConstantString(C)) 1382798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getMergeableCString(); 139f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 140f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Otherwise, just drop it into a mergable constant section. If we have 141f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // a section for this size, use it, otherwise use the arbitrary sized 142f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // mergable section. 143f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner switch (TM.getTargetData()->getTypeAllocSize(C->getType())) { 1442798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner case 4: return SectionKind::getMergeableConst4(); 1452798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner case 8: return SectionKind::getMergeableConst8(); 1462798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner case 16: return SectionKind::getMergeableConst16(); 1472798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner default: return SectionKind::getMergeableConst(); 148f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 149f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 150f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner case Constant::LocalRelocation: 151f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // In static relocation model, the linker will resolve all addresses, so 152f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // the relocation entries will actually be constants by the time the app 153f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // starts up. However, we can't put this into a mergable section, because 154f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // the linker doesn't take relocations into consideration when it tries to 155f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // merge entries in the section. 156f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (ReloModel == Reloc::Static) 1572798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getReadOnly(); 158f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 159f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Otherwise, the dynamic linker needs to fix it up, put it in the 160f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // writable data.rel.local section. 1612798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getReadOnlyWithRelLocal(); 162f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 163f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner case Constant::GlobalRelocations: 164f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // In static relocation model, the linker will resolve all addresses, so 165f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // the relocation entries will actually be constants by the time the app 166f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // starts up. However, we can't put this into a mergable section, because 167f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // the linker doesn't take relocations into consideration when it tries to 168f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // merge entries in the section. 169f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (ReloModel == Reloc::Static) 1702798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getReadOnly(); 171f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 172f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Otherwise, the dynamic linker needs to fix it up, put it in the 173f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // writable data.rel section. 1742798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getReadOnlyWithRel(); 175f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 176f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 177f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 178f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Okay, this isn't a constant. If the initializer for the global is going 179f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // to require a runtime relocation by the dynamic linker, put it into a more 180f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // specific section to improve startup time of the app. This coalesces these 181f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // globals together onto fewer pages, improving the locality of the dynamic 182f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // linker. 183f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (ReloModel == Reloc::Static) 1842798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getDataNoRel(); 185f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 186f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner switch (C->getRelocationInfo()) { 187f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner default: llvm_unreachable("unknown relocation info kind"); 188f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner case Constant::NoRelocation: 1892798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getDataNoRel(); 190f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner case Constant::LocalRelocation: 1912798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getDataRelLocal(); 192f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner case Constant::GlobalRelocations: 1932798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getDataRel(); 194f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 195f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 196f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 197f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner/// SectionForGlobal - This method computes the appropriate section to emit 198f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner/// the specified global variable or function definition. This should not 199f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner/// be passed external (or available externally) globals. 200a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattnerconst MCSection *TargetLoweringObjectFile:: 201e53a600f065075731d0aeb9dc8f4f3d75f5a05f8Chris LattnerSectionForGlobal(const GlobalValue *GV, Mangler *Mang, 202e53a600f065075731d0aeb9dc8f4f3d75f5a05f8Chris Lattner const TargetMachine &TM) const { 203f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner assert(!GV->isDeclaration() && !GV->hasAvailableExternallyLinkage() && 204f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner "Can only be used for global definitions"); 205f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 206968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner SectionKind Kind = SectionKindForGlobal(GV, TM); 207f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 208f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Select section name. 209f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (GV->hasSection()) { 210f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // If the target has special section hacks for specifically named globals, 211f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // return them now. 212f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (const MCSection *TS = getSpecialCasedSectionGlobals(GV, Mang, Kind)) 213f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return TS; 214f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 215f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // If the target has magic semantics for certain section names, make sure to 216f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // pick up the flags. This allows the user to write things with attribute 217f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // section and still get the appropriate section flags printed. 218968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner Kind = getKindForNamedSection(GV->getSection().c_str(), Kind); 219f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 220968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner return getOrCreateSection(GV->getSection().c_str(), false, Kind); 221f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 222f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 223f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 224f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Use default section depending on the 'type' of global 225f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner return SelectSectionForGlobal(GV, Kind, Mang, TM); 226f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 227f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 228f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// Lame default implementation. Calculate the section name for global. 229a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattnerconst MCSection * 230f0144127b98425d214e59e4a1a4b342b78e3642bChris LattnerTargetLoweringObjectFile::SelectSectionForGlobal(const GlobalValue *GV, 231f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner SectionKind Kind, 232e53a600f065075731d0aeb9dc8f4f3d75f5a05f8Chris Lattner Mangler *Mang, 233f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner const TargetMachine &TM) const{ 234f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner assert(!Kind.isThreadLocal() && "Doesn't support TLS"); 235f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 236f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isText()) 237f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return getTextSection(); 238f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 239824583844a8f334dd261894a3fac7ad476531667Chris Lattner if (Kind.isBSS() && BSSSection != 0) 240824583844a8f334dd261894a3fac7ad476531667Chris Lattner return BSSSection; 241f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 242f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isReadOnly() && ReadOnlySection != 0) 243f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ReadOnlySection; 244f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 245f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return getDataSection(); 246f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 247f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 24883d77faf6e8fc2c1c2377d037283dc162d8667a1Chris Lattner/// getSectionForConstant - Given a mergable constant with the 249f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner/// specified size and relocation information, return a section that it 250f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner/// should be placed in. 251a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattnerconst MCSection * 25283d77faf6e8fc2c1c2377d037283dc162d8667a1Chris LattnerTargetLoweringObjectFile::getSectionForConstant(SectionKind Kind) const { 253f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isReadOnly() && ReadOnlySection != 0) 254f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ReadOnlySection; 255f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 256f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return DataSection; 257f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 258f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 259f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 260a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattnerconst MCSection *TargetLoweringObjectFile:: 261968ff1196768c0b6dbcc5508025a2923bfa73fabChris LattnergetOrCreateSection(const char *Name, bool isDirective, SectionKind Kind) const { 262a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattner if (MCSection *S = Ctx->GetSection(Name)) 263a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattner return S; 264968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner return MCSection::Create(Name, isDirective, Kind, *Ctx); 265f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 266f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 267f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 268f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 269f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner//===----------------------------------------------------------------------===// 270f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// ELF 271f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner//===----------------------------------------------------------------------===// 272f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 273f26e03bc7e30162197641406e37e662a15d80f7eChris Lattnervoid TargetLoweringObjectFileELF::Initialize(MCContext &Ctx, 274f26e03bc7e30162197641406e37e662a15d80f7eChris Lattner const TargetMachine &TM) { 275a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattner TargetLoweringObjectFile::Initialize(Ctx, TM); 276f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (!HasCrazyBSS) 2772798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner BSSSection = getOrCreateSection("\t.bss", true, SectionKind::getBSS()); 278f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner else 279f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // PPC/Linux doesn't support the .bss directive, it needs .section .bss. 280f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // FIXME: Does .section .bss work everywhere?? 281968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner // FIXME2: this should just be handle by the section printer. We should get 282968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner // away from syntactic view of the sections and MCSection should just be a 283968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner // semantic view. 2842798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner BSSSection = getOrCreateSection("\t.bss", false, SectionKind::getBSS()); 285f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 286f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 2872798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner TextSection = getOrCreateSection("\t.text", true, SectionKind::getText()); 2882798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner DataSection = getOrCreateSection("\t.data", true, SectionKind::getDataRel()); 289f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner ReadOnlySection = 2902798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner getOrCreateSection("\t.rodata", false, SectionKind::getReadOnly()); 291f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner TLSDataSection = 2922798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner getOrCreateSection("\t.tdata", false, SectionKind::getThreadData()); 293824583844a8f334dd261894a3fac7ad476531667Chris Lattner CStringSection = getOrCreateSection("\t.rodata.str", true, 2942798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getMergeableCString()); 295f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 296968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner TLSBSSSection = getOrCreateSection("\t.tbss", false, 2972798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getThreadBSS()); 298f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 299f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner DataRelSection = getOrCreateSection("\t.data.rel", false, 3002798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getDataRel()); 301f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner DataRelLocalSection = getOrCreateSection("\t.data.rel.local", false, 3022798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getDataRelLocal()); 303f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner DataRelROSection = getOrCreateSection("\t.data.rel.ro", false, 3042798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getReadOnlyWithRel()); 305f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner DataRelROLocalSection = 306f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner getOrCreateSection("\t.data.rel.ro.local", false, 3072798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getReadOnlyWithRelLocal()); 308f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 309f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner MergeableConst4Section = getOrCreateSection(".rodata.cst4", false, 3102798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getMergeableConst4()); 311f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner MergeableConst8Section = getOrCreateSection(".rodata.cst8", false, 3122798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getMergeableConst8()); 313f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner MergeableConst16Section = getOrCreateSection(".rodata.cst16", false, 3142798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getMergeableConst16()); 31580ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner 31680ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner StaticCtorSection = 31780ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner getOrCreateSection(".ctors", false, SectionKind::getDataRel()); 31880ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner StaticDtorSection = 31980ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner getOrCreateSection(".dtors", false, SectionKind::getDataRel()); 320d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner 32118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner // Exception Handling Sections. 322d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner 323d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner // FIXME: We're emitting LSDA info into a readonly section on ELF, even though 324d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner // it contains relocatable pointers. In PIC mode, this is probably a big 325d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner // runtime hit for C++ apps. Either the contents of the LSDA need to be 326d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner // adjusted or this should be a data section. 327d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner LSDASection = 328d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner getOrCreateSection(".gcc_except_table", false, SectionKind::getReadOnly()); 32935039ac24163e99cfab161620a9fb41f944a63d5Chris Lattner EHFrameSection = 33035039ac24163e99cfab161620a9fb41f944a63d5Chris Lattner getOrCreateSection(".eh_frame", false, SectionKind::getDataRel()); 33118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner 33218a4c16726db2b8874c7b84d04650dda80746074Chris Lattner // Debug Info Sections. 33318a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfAbbrevSection = 33418a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".debug_abbrev", false, SectionKind::getMetadata()); 33518a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfInfoSection = 33618a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".debug_info", false, SectionKind::getMetadata()); 33718a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfLineSection = 33818a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".debug_line", false, SectionKind::getMetadata()); 33918a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfFrameSection = 34018a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".debug_frame", false, SectionKind::getMetadata()); 34118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfPubNamesSection = 34218a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".debug_pubnames", false, SectionKind::getMetadata()); 34318a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfPubTypesSection = 34418a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".debug_pubtypes", false, SectionKind::getMetadata()); 34518a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfStrSection = 34618a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".debug_str", false, SectionKind::getMetadata()); 34718a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfLocSection = 34818a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".debug_loc", false, SectionKind::getMetadata()); 34918a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfARangesSection = 35018a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".debug_aranges", false, SectionKind::getMetadata()); 35118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfRangesSection = 35218a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".debug_ranges", false, SectionKind::getMetadata()); 35318a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfMacroInfoSection = 35418a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".debug_macinfo", false, SectionKind::getMetadata()); 355f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 356f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 357f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 358968ff1196768c0b6dbcc5508025a2923bfa73fabChris LattnerSectionKind TargetLoweringObjectFileELF:: 359968ff1196768c0b6dbcc5508025a2923bfa73fabChris LattnergetKindForNamedSection(const char *Name, SectionKind K) const { 360f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Name[0] != '.') return K; 361f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 362f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Some lame default implementation based on some magic section names. 363f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (strncmp(Name, ".gnu.linkonce.b.", 16) == 0 || 364f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner strncmp(Name, ".llvm.linkonce.b.", 17) == 0 || 365f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner strncmp(Name, ".gnu.linkonce.sb.", 17) == 0 || 366f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner strncmp(Name, ".llvm.linkonce.sb.", 18) == 0) 3672798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getBSS(); 368f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 369f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (strcmp(Name, ".tdata") == 0 || 370f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner strncmp(Name, ".tdata.", 7) == 0 || 371f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner strncmp(Name, ".gnu.linkonce.td.", 17) == 0 || 372f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner strncmp(Name, ".llvm.linkonce.td.", 18) == 0) 3732798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getThreadData(); 374f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 375f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (strcmp(Name, ".tbss") == 0 || 376f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner strncmp(Name, ".tbss.", 6) == 0 || 377f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner strncmp(Name, ".gnu.linkonce.tb.", 17) == 0 || 378f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner strncmp(Name, ".llvm.linkonce.tb.", 18) == 0) 3792798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner return SectionKind::getThreadBSS(); 380f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 381f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return K; 382f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 383f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 384f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattnervoid TargetLoweringObjectFileELF:: 385f0144127b98425d214e59e4a1a4b342b78e3642bChris LattnergetSectionFlagsAsString(SectionKind Kind, SmallVectorImpl<char> &Str) const { 386f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back(','); 387f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('"'); 388f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 389f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (!Kind.isMetadata()) 390f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('a'); 391f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isText()) 392f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('x'); 393f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isWriteable()) 394f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('w'); 39582987bfe9b6ae85a8836c9f2d2e9f0ef9866edb1Chris Lattner if (Kind.isMergeableCString() || 39682987bfe9b6ae85a8836c9f2d2e9f0ef9866edb1Chris Lattner Kind.isMergeableConst4() || 39782987bfe9b6ae85a8836c9f2d2e9f0ef9866edb1Chris Lattner Kind.isMergeableConst8() || 39882987bfe9b6ae85a8836c9f2d2e9f0ef9866edb1Chris Lattner Kind.isMergeableConst16()) 399f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('M'); 400f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isMergeableCString()) 401f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('S'); 402f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isThreadLocal()) 403f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('T'); 404f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 405f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('"'); 406f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back(','); 407f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 408f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // If comment string is '@', e.g. as on ARM - use '%' instead 409f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (AtIsCommentChar) 410f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('%'); 411f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner else 412f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('@'); 413f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 414f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner const char *KindStr; 415bf15e433b9ac6692e76aff0465cd93bb87f68989Chris Lattner if (Kind.isBSS() || Kind.isThreadBSS()) 416f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner KindStr = "nobits"; 417f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner else 418f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner KindStr = "progbits"; 419f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 420f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.append(KindStr, KindStr+strlen(KindStr)); 421f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 422f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isMergeableCString()) { 423f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // TODO: Eventually handle multiple byte character strings. For now, all 424f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // mergable C strings are single byte. 425f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back(','); 426f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('1'); 427f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } else if (Kind.isMergeableConst4()) { 428f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back(','); 429f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('4'); 430f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } else if (Kind.isMergeableConst8()) { 431f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back(','); 432f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('8'); 433f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } else if (Kind.isMergeableConst16()) { 434f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back(','); 435f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('1'); 436f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.push_back('6'); 437f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 438f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 439f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 440f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 441f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattnerstatic const char *getSectionPrefixForUniqueGlobal(SectionKind Kind) { 442f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isText()) return ".gnu.linkonce.t."; 443f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isReadOnly()) return ".gnu.linkonce.r."; 444f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 445f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isThreadData()) return ".gnu.linkonce.td."; 446f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isThreadBSS()) return ".gnu.linkonce.tb."; 447f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 448f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isBSS()) return ".gnu.linkonce.b."; 449f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isDataNoRel()) return ".gnu.linkonce.d."; 450f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isDataRelLocal()) return ".gnu.linkonce.d.rel.local."; 451f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isDataRel()) return ".gnu.linkonce.d.rel."; 452f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isReadOnlyWithRelLocal()) return ".gnu.linkonce.d.rel.ro.local."; 453f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 454f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner assert(Kind.isReadOnlyWithRel() && "Unknown section kind"); 455f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ".gnu.linkonce.d.rel.ro."; 456f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 457f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 458a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattnerconst MCSection *TargetLoweringObjectFileELF:: 459f9650c061ee89ac55740555530ca5c2842c28738Chris LattnerSelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, 460e53a600f065075731d0aeb9dc8f4f3d75f5a05f8Chris Lattner Mangler *Mang, const TargetMachine &TM) const { 461f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 462f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // If this global is linkonce/weak and the target handles this by emitting it 463f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // into a 'uniqued' section name, create and return the section now. 46427602b82c2a12b9f99c1f7fcbfb4be5ba97dbd7dChris Lattner if (GV->isWeakForLinker()) { 465f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner const char *Prefix = getSectionPrefixForUniqueGlobal(Kind); 466b8f396bdbb06b585b480ada31ec8c2ab35916a55Chris Lattner std::string Name = Mang->makeNameProper(GV->getNameStr()); 467f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner return getOrCreateSection((Prefix+Name).c_str(), false, Kind); 468f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 469f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 470f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isText()) return TextSection; 471e53a600f065075731d0aeb9dc8f4f3d75f5a05f8Chris Lattner 472f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isMergeableCString()) { 473824583844a8f334dd261894a3fac7ad476531667Chris Lattner assert(CStringSection && "Should have string section prefix"); 474f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 475067fe1ae5488764afb8d8fdafba65899dc221887Chris Lattner // We also need alignment here. 476067fe1ae5488764afb8d8fdafba65899dc221887Chris Lattner // FIXME: this is getting the alignment of the character, not the 477067fe1ae5488764afb8d8fdafba65899dc221887Chris Lattner // alignment of the global! 478067fe1ae5488764afb8d8fdafba65899dc221887Chris Lattner unsigned Align = 479067fe1ae5488764afb8d8fdafba65899dc221887Chris Lattner TM.getTargetData()->getPreferredAlignment(cast<GlobalVariable>(GV)); 480f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 481824583844a8f334dd261894a3fac7ad476531667Chris Lattner std::string Name = CStringSection->getName() + "1." + utostr(Align); 482067fe1ae5488764afb8d8fdafba65899dc221887Chris Lattner return getOrCreateSection(Name.c_str(), false, 4832798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getMergeableCString()); 484f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 485f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 486f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isMergeableConst()) { 487f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isMergeableConst4()) 488f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return MergeableConst4Section; 489f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isMergeableConst8()) 490f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return MergeableConst8Section; 491f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isMergeableConst16()) 492f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return MergeableConst16Section; 493f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ReadOnlySection; // .const 494f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 495f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 496f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isReadOnly()) return ReadOnlySection; 497f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 498f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isThreadData()) return TLSDataSection; 499f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isThreadBSS()) return TLSBSSSection; 500f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 501824583844a8f334dd261894a3fac7ad476531667Chris Lattner if (Kind.isBSS()) return BSSSection; 502f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 503f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isDataNoRel()) return DataSection; 504f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isDataRelLocal()) return DataRelLocalSection; 505f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isDataRel()) return DataRelSection; 506f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isReadOnlyWithRelLocal()) return DataRelROLocalSection; 507f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 508f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner assert(Kind.isReadOnlyWithRel() && "Unknown section kind"); 509f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return DataRelROSection; 510f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 511f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 51283d77faf6e8fc2c1c2377d037283dc162d8667a1Chris Lattner/// getSectionForConstant - Given a mergeable constant with the 513f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner/// specified size and relocation information, return a section that it 514f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner/// should be placed in. 515a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattnerconst MCSection *TargetLoweringObjectFileELF:: 51683d77faf6e8fc2c1c2377d037283dc162d8667a1Chris LattnergetSectionForConstant(SectionKind Kind) const { 517f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isMergeableConst4()) 518f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return MergeableConst4Section; 519f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isMergeableConst8()) 520f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return MergeableConst8Section; 521f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isMergeableConst16()) 522f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return MergeableConst16Section; 523f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isReadOnly()) 524f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ReadOnlySection; 525f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 526f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isReadOnlyWithRelLocal()) return DataRelROLocalSection; 527f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner assert(Kind.isReadOnlyWithRel() && "Unknown section kind"); 528f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return DataRelROSection; 529f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 530f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 531f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner//===----------------------------------------------------------------------===// 532f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// MachO 533f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner//===----------------------------------------------------------------------===// 534f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 53511e9657eeb76dff6baaab1cbac0b1fb7e1abb439Chris Lattnerconst MCSection *TargetLoweringObjectFileMachO:: 53611e9657eeb76dff6baaab1cbac0b1fb7e1abb439Chris LattnergetMachOSection(const char *Name, bool isDirective, SectionKind K) { 53711e9657eeb76dff6baaab1cbac0b1fb7e1abb439Chris Lattner // FOR NOW, Just forward. 53811e9657eeb76dff6baaab1cbac0b1fb7e1abb439Chris Lattner return getOrCreateSection(Name, isDirective, K); 53911e9657eeb76dff6baaab1cbac0b1fb7e1abb439Chris Lattner} 54011e9657eeb76dff6baaab1cbac0b1fb7e1abb439Chris Lattner 54111e9657eeb76dff6baaab1cbac0b1fb7e1abb439Chris Lattner 54211e9657eeb76dff6baaab1cbac0b1fb7e1abb439Chris Lattner 543f26e03bc7e30162197641406e37e662a15d80f7eChris Lattnervoid TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx, 544f26e03bc7e30162197641406e37e662a15d80f7eChris Lattner const TargetMachine &TM) { 545a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattner TargetLoweringObjectFile::Initialize(Ctx, TM); 546968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner TextSection = getOrCreateSection("\t.text", true, 5472798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getText()); 548968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner DataSection = getOrCreateSection("\t.data", true, 5492798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getDataRel()); 550f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 551824583844a8f334dd261894a3fac7ad476531667Chris Lattner CStringSection = getOrCreateSection("\t.cstring", true, 5522798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getMergeableCString()); 553f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner FourByteConstantSection = getOrCreateSection("\t.literal4\n", true, 5542798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getMergeableConst4()); 555f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner EightByteConstantSection = getOrCreateSection("\t.literal8\n", true, 5562798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getMergeableConst8()); 5574bb253c60f895131371aa2ad1bfa5a2bea213f78Chris Lattner 5584bb253c60f895131371aa2ad1bfa5a2bea213f78Chris Lattner // ld_classic doesn't support .literal16 in 32-bit mode, and ld64 falls back 5594bb253c60f895131371aa2ad1bfa5a2bea213f78Chris Lattner // to using it in -static mode. 5604bb253c60f895131371aa2ad1bfa5a2bea213f78Chris Lattner if (TM.getRelocationModel() != Reloc::Static && 5614bb253c60f895131371aa2ad1bfa5a2bea213f78Chris Lattner TM.getTargetData()->getPointerSize() == 32) 5624bb253c60f895131371aa2ad1bfa5a2bea213f78Chris Lattner SixteenByteConstantSection = 563968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner getOrCreateSection("\t.literal16\n", true, 5642798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getMergeableConst16()); 5654bb253c60f895131371aa2ad1bfa5a2bea213f78Chris Lattner else 5664bb253c60f895131371aa2ad1bfa5a2bea213f78Chris Lattner SixteenByteConstantSection = 0; 567f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 568968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner ReadOnlySection = getOrCreateSection("\t.const", true, 5692798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getReadOnly()); 570f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 571f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner TextCoalSection = 572f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner getOrCreateSection("\t__TEXT,__textcoal_nt,coalesced,pure_instructions", 5732798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner false, SectionKind::getText()); 574f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner ConstTextCoalSection = getOrCreateSection("\t__TEXT,__const_coal,coalesced", 575968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner false, 5762798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getText()); 577f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner ConstDataCoalSection = getOrCreateSection("\t__DATA,__const_coal,coalesced", 578968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner false, 5792798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getText()); 580f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner ConstDataSection = getOrCreateSection("\t.const_data", true, 5812798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getReadOnlyWithRel()); 582f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner DataCoalSection = getOrCreateSection("\t__DATA,__datacoal_nt,coalesced", 583968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner false, 5842798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getDataRel()); 58580ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner 58680ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner if (TM.getRelocationModel() == Reloc::Static) { 58780ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner StaticCtorSection = 58880ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner getOrCreateSection(".constructor", true, SectionKind::getDataRel()); 58980ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner StaticDtorSection = 59080ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner getOrCreateSection(".destructor", true, SectionKind::getDataRel()); 59180ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner } else { 59280ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner StaticCtorSection = 59380ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner getOrCreateSection(".mod_init_func", true, SectionKind::getDataRel()); 59480ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner StaticDtorSection = 59580ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner getOrCreateSection(".mod_term_func", true, SectionKind::getDataRel()); 59680ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner } 59780ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner 59818a4c16726db2b8874c7b84d04650dda80746074Chris Lattner // Exception Handling. 599d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner LSDASection = getOrCreateSection("__DATA,__gcc_except_tab", false, 600d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner SectionKind::getDataRel()); 60135039ac24163e99cfab161620a9fb41f944a63d5Chris Lattner EHFrameSection = 60235039ac24163e99cfab161620a9fb41f944a63d5Chris Lattner getOrCreateSection("__TEXT,__eh_frame,coalesced,no_toc+strip_static_syms" 60335039ac24163e99cfab161620a9fb41f944a63d5Chris Lattner "+live_support", false, SectionKind::getReadOnly()); 60418a4c16726db2b8874c7b84d04650dda80746074Chris Lattner 60518a4c16726db2b8874c7b84d04650dda80746074Chris Lattner // Debug Information. 60618a4c16726db2b8874c7b84d04650dda80746074Chris Lattner // FIXME: Don't use 'directive' syntax: need flags for debug/regular?? 60718a4c16726db2b8874c7b84d04650dda80746074Chris Lattner // FIXME: Need __DWARF segment. 60818a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfAbbrevSection = 60918a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".section __DWARF,__debug_abbrev,regular,debug", true, 61018a4c16726db2b8874c7b84d04650dda80746074Chris Lattner SectionKind::getMetadata()); 61118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfInfoSection = 61218a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".section __DWARF,__debug_info,regular,debug", true, 61318a4c16726db2b8874c7b84d04650dda80746074Chris Lattner SectionKind::getMetadata()); 61418a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfLineSection = 61518a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".section __DWARF,__debug_line,regular,debug", true, 61618a4c16726db2b8874c7b84d04650dda80746074Chris Lattner SectionKind::getMetadata()); 61718a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfFrameSection = 61818a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".section __DWARF,__debug_frame,regular,debug", true, 61918a4c16726db2b8874c7b84d04650dda80746074Chris Lattner SectionKind::getMetadata()); 62018a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfPubNamesSection = 62118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".section __DWARF,__debug_pubnames,regular,debug", true, 62218a4c16726db2b8874c7b84d04650dda80746074Chris Lattner SectionKind::getMetadata()); 62318a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfPubTypesSection = 62418a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".section __DWARF,__debug_pubtypes,regular,debug", true, 62518a4c16726db2b8874c7b84d04650dda80746074Chris Lattner SectionKind::getMetadata()); 62618a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfStrSection = 62718a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".section __DWARF,__debug_str,regular,debug", true, 62818a4c16726db2b8874c7b84d04650dda80746074Chris Lattner SectionKind::getMetadata()); 62918a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfLocSection = 63018a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".section __DWARF,__debug_loc,regular,debug", true, 63118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner SectionKind::getMetadata()); 63218a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfARangesSection = 63318a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".section __DWARF,__debug_aranges,regular,debug", true, 63418a4c16726db2b8874c7b84d04650dda80746074Chris Lattner SectionKind::getMetadata()); 63518a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfRangesSection = 63618a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".section __DWARF,__debug_ranges,regular,debug", true, 63718a4c16726db2b8874c7b84d04650dda80746074Chris Lattner SectionKind::getMetadata()); 63818a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfMacroInfoSection = 63918a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".section __DWARF,__debug_macinfo,regular,debug", true, 64018a4c16726db2b8874c7b84d04650dda80746074Chris Lattner SectionKind::getMetadata()); 64118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfDebugInlineSection = 64218a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection(".section __DWARF,__debug_inlined,regular,debug", true, 64318a4c16726db2b8874c7b84d04650dda80746074Chris Lattner SectionKind::getMetadata()); 644f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 645f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 646a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattnerconst MCSection *TargetLoweringObjectFileMachO:: 647f9650c061ee89ac55740555530ca5c2842c28738Chris LattnerSelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, 648e53a600f065075731d0aeb9dc8f4f3d75f5a05f8Chris Lattner Mangler *Mang, const TargetMachine &TM) const { 649f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner assert(!Kind.isThreadLocal() && "Darwin doesn't support TLS"); 650f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 651f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isText()) 65227602b82c2a12b9f99c1f7fcbfb4be5ba97dbd7dChris Lattner return GV->isWeakForLinker() ? TextCoalSection : TextSection; 653f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 654f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // If this is weak/linkonce, put this in a coalescable section, either in text 655f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // or data depending on if it is writable. 65627602b82c2a12b9f99c1f7fcbfb4be5ba97dbd7dChris Lattner if (GV->isWeakForLinker()) { 657f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isReadOnly()) 658f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ConstTextCoalSection; 659f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return DataCoalSection; 660f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 661f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 662f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // FIXME: Alignment check should be handled by section classifier. 663f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isMergeableCString()) { 664f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Constant *C = cast<GlobalVariable>(GV)->getInitializer(); 665f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner const Type *Ty = cast<ArrayType>(C->getType())->getElementType(); 666f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner const TargetData &TD = *TM.getTargetData(); 667f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner unsigned Size = TD.getTypeAllocSize(Ty); 668f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Size) { 669f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner unsigned Align = TD.getPreferredAlignment(cast<GlobalVariable>(GV)); 670f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Align <= 32) 671824583844a8f334dd261894a3fac7ad476531667Chris Lattner return CStringSection; 672f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 673f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 674f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ReadOnlySection; 675f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 676f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 677f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isMergeableConst()) { 678f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isMergeableConst4()) 679f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return FourByteConstantSection; 680f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isMergeableConst8()) 681f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return EightByteConstantSection; 682f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isMergeableConst16() && SixteenByteConstantSection) 683f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return SixteenByteConstantSection; 684f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ReadOnlySection; // .const 685f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 686f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 687f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // FIXME: ROData -> const in -static mode that is relocatable but they happen 688f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // by the static linker. Why not mergeable? 689f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isReadOnly()) 690f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ReadOnlySection; 691f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 692f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // If this is marked const, put it into a const section. But if the dynamic 693f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // linker needs to write to it, put it in the data segment. 694f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isReadOnlyWithRel()) 695f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ConstDataSection; 696f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 697f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // Otherwise, just drop the variable in the normal data section. 698f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return DataSection; 699f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 700f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 701a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattnerconst MCSection * 70283d77faf6e8fc2c1c2377d037283dc162d8667a1Chris LattnerTargetLoweringObjectFileMachO::getSectionForConstant(SectionKind Kind) const { 703f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // If this constant requires a relocation, we have to put it in the data 704f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // segment, not in the text segment. 705f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isDataRel()) 706f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ConstDataSection; 707f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 708f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isMergeableConst4()) 709f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return FourByteConstantSection; 710f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isMergeableConst8()) 711f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return EightByteConstantSection; 7124bb253c60f895131371aa2ad1bfa5a2bea213f78Chris Lattner if (Kind.isMergeableConst16() && SixteenByteConstantSection) 713f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return SixteenByteConstantSection; 714f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ReadOnlySection; // .const 715f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 716f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 71726630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner/// shouldEmitUsedDirectiveFor - This hook allows targets to selectively decide 71826630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner/// not to emit the UsedDirective for some symbols in llvm.used. 71926630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner// FIXME: REMOVE this (rdar://7071300) 72026630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattnerbool TargetLoweringObjectFileMachO:: 72126630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris LattnershouldEmitUsedDirectiveFor(const GlobalValue *GV, Mangler *Mang) const { 72226630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner /// On Darwin, internally linked data beginning with "L" or "l" does not have 72326630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner /// the directive emitted (this occurs in ObjC metadata). 72426630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner if (!GV) return false; 72526630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner 72626630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner // Check whether the mangled name has the "Private" or "LinkerPrivate" prefix. 72726630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner if (GV->hasLocalLinkage() && !isa<Function>(GV)) { 72826630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner // FIXME: ObjC metadata is currently emitted as internal symbols that have 72926630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner // \1L and \0l prefixes on them. Fix them to be Private/LinkerPrivate and 73026630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner // this horrible hack can go away. 73126630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner const std::string &Name = Mang->getMangledName(GV); 73226630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner if (Name[0] == 'L' || Name[0] == 'l') 73326630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner return false; 73426630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner } 73526630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner 73626630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner return true; 73726630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner} 73826630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner 73926630c1180502d07c9b2b4a9a4ba06bc5ddf180bChris Lattner 740f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner//===----------------------------------------------------------------------===// 741f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner// COFF 742f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner//===----------------------------------------------------------------------===// 743f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 74411e9657eeb76dff6baaab1cbac0b1fb7e1abb439Chris Lattnerconst MCSection *TargetLoweringObjectFileCOFF:: 74511e9657eeb76dff6baaab1cbac0b1fb7e1abb439Chris LattnergetCOFFSection(const char *Name, bool isDirective, SectionKind K) { 74611e9657eeb76dff6baaab1cbac0b1fb7e1abb439Chris Lattner return getOrCreateSection(Name, isDirective, K); 74711e9657eeb76dff6baaab1cbac0b1fb7e1abb439Chris Lattner} 74811e9657eeb76dff6baaab1cbac0b1fb7e1abb439Chris Lattner 749f26e03bc7e30162197641406e37e662a15d80f7eChris Lattnervoid TargetLoweringObjectFileCOFF::Initialize(MCContext &Ctx, 750f26e03bc7e30162197641406e37e662a15d80f7eChris Lattner const TargetMachine &TM) { 751a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattner TargetLoweringObjectFile::Initialize(Ctx, TM); 752968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner TextSection = getOrCreateSection("\t.text", true, 7532798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getText()); 754968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner DataSection = getOrCreateSection("\t.data", true, 7552798119ab4d7e0b42812b3acdf37821f40dee627Chris Lattner SectionKind::getDataRel()); 75680ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner StaticCtorSection = 75780ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner getOrCreateSection(".ctors", false, SectionKind::getDataRel()); 75880ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner StaticDtorSection = 75980ec2792b2b271eca55743a3cc4c8bca214fa705Chris Lattner getOrCreateSection(".dtors", false, SectionKind::getDataRel()); 76018a4c16726db2b8874c7b84d04650dda80746074Chris Lattner 76118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner 76218a4c16726db2b8874c7b84d04650dda80746074Chris Lattner // Debug info. 76318a4c16726db2b8874c7b84d04650dda80746074Chris Lattner // FIXME: Don't use 'directive' mode here. 76418a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfAbbrevSection = 76518a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection("\t.section\t.debug_abbrev,\"dr\"", 76618a4c16726db2b8874c7b84d04650dda80746074Chris Lattner true, SectionKind::getMetadata()); 76718a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfInfoSection = 76818a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection("\t.section\t.debug_info,\"dr\"", 76918a4c16726db2b8874c7b84d04650dda80746074Chris Lattner true, SectionKind::getMetadata()); 77018a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfLineSection = 77118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection("\t.section\t.debug_line,\"dr\"", 77218a4c16726db2b8874c7b84d04650dda80746074Chris Lattner true, SectionKind::getMetadata()); 77318a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfFrameSection = 77418a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection("\t.section\t.debug_frame,\"dr\"", 77518a4c16726db2b8874c7b84d04650dda80746074Chris Lattner true, SectionKind::getMetadata()); 77618a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfPubNamesSection = 77718a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection("\t.section\t.debug_pubnames,\"dr\"", 77818a4c16726db2b8874c7b84d04650dda80746074Chris Lattner true, SectionKind::getMetadata()); 77918a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfPubTypesSection = 78018a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection("\t.section\t.debug_pubtypes,\"dr\"", 78118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner true, SectionKind::getMetadata()); 78218a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfStrSection = 78318a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection("\t.section\t.debug_str,\"dr\"", 78418a4c16726db2b8874c7b84d04650dda80746074Chris Lattner true, SectionKind::getMetadata()); 78518a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfLocSection = 78618a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection("\t.section\t.debug_loc,\"dr\"", 78718a4c16726db2b8874c7b84d04650dda80746074Chris Lattner true, SectionKind::getMetadata()); 78818a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfARangesSection = 78918a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection("\t.section\t.debug_aranges,\"dr\"", 79018a4c16726db2b8874c7b84d04650dda80746074Chris Lattner true, SectionKind::getMetadata()); 79118a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfRangesSection = 79218a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection("\t.section\t.debug_ranges,\"dr\"", 79318a4c16726db2b8874c7b84d04650dda80746074Chris Lattner true, SectionKind::getMetadata()); 79418a4c16726db2b8874c7b84d04650dda80746074Chris Lattner DwarfMacroInfoSection = 79518a4c16726db2b8874c7b84d04650dda80746074Chris Lattner getOrCreateSection("\t.section\t.debug_macinfo,\"dr\"", 79618a4c16726db2b8874c7b84d04650dda80746074Chris Lattner true, SectionKind::getMetadata()); 797f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 798f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 799f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattnervoid TargetLoweringObjectFileCOFF:: 800f0144127b98425d214e59e4a1a4b342b78e3642bChris LattnergetSectionFlagsAsString(SectionKind Kind, SmallVectorImpl<char> &Str) const { 801f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // FIXME: Inefficient. 802f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner std::string Res = ",\""; 803f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isText()) 804f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Res += 'x'; 805f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isWriteable()) 806f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Res += 'w'; 807f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Res += "\""; 808f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 809f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner Str.append(Res.begin(), Res.end()); 810f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 811f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 812f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattnerstatic const char *getCOFFSectionPrefixForUniqueGlobal(SectionKind Kind) { 813f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isText()) 814f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ".text$linkonce"; 815f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner if (Kind.isWriteable()) 816f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ".data$linkonce"; 817f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return ".rdata$linkonce"; 818f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 819f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 820f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 821a87dea4f8c546ca748f1777a8d1cabcc06515d91Chris Lattnerconst MCSection *TargetLoweringObjectFileCOFF:: 822f9650c061ee89ac55740555530ca5c2842c28738Chris LattnerSelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, 823e53a600f065075731d0aeb9dc8f4f3d75f5a05f8Chris Lattner Mangler *Mang, const TargetMachine &TM) const { 824f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner assert(!Kind.isThreadLocal() && "Doesn't support TLS"); 825f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 826f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // If this global is linkonce/weak and the target handles this by emitting it 827f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner // into a 'uniqued' section name, create and return the section now. 82827602b82c2a12b9f99c1f7fcbfb4be5ba97dbd7dChris Lattner if (GV->isWeakForLinker()) { 829f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner const char *Prefix = getCOFFSectionPrefixForUniqueGlobal(Kind); 830968ff1196768c0b6dbcc5508025a2923bfa73fabChris Lattner std::string Name = Mang->makeNameProper(GV->getNameStr()); 831f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner return getOrCreateSection((Prefix+Name).c_str(), false, Kind); 832f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner } 833f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 834f9650c061ee89ac55740555530ca5c2842c28738Chris Lattner if (Kind.isText()) 835f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return getTextSection(); 836f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 837f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner return getDataSection(); 838f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner} 839f0144127b98425d214e59e4a1a4b342b78e3642bChris Lattner 840