--- /dev/null
+//==-- llvm/CodeGen/TargetLoweringObjectFileImpl.h - Object Info -*- C++ -*-==//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements classes used to handle lowerings specific to common
+// object file formats.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H
+#define LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H
+
+#include "llvm/ADT/StringRef.h"
+#include "llvm/MC/SectionKind.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+
+namespace llvm {
+ class MachineModuleInfo;
+ class Mangler;
+ class MCAsmInfo;
+ class MCExpr;
+ class MCSection;
+ class MCSectionMachO;
+ class MCSymbol;
+ class MCContext;
+ class GlobalValue;
+ class TargetMachine;
+
+
+class TargetLoweringObjectFileELF : public TargetLoweringObjectFile {
+ mutable void *UniquingMap;
+protected:
+ /// TLSDataSection - Section directive for Thread Local data.
+ ///
+ const MCSection *TLSDataSection; // Defaults to ".tdata".
+
+ /// TLSBSSSection - Section directive for Thread Local uninitialized data.
+ /// Null if this target doesn't support a BSS section.
+ ///
+ const MCSection *TLSBSSSection; // Defaults to ".tbss".
+
+ const MCSection *DataRelSection;
+ const MCSection *DataRelLocalSection;
+ const MCSection *DataRelROSection;
+ const MCSection *DataRelROLocalSection;
+
+ const MCSection *MergeableConst4Section;
+ const MCSection *MergeableConst8Section;
+ const MCSection *MergeableConst16Section;
+
+protected:
+ const MCSection *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, SectionKind Kind,
+ bool IsExplicit = false) const;
+public:
+ TargetLoweringObjectFileELF() : UniquingMap(0) {}
+ ~TargetLoweringObjectFileELF();
+
+ virtual void Initialize(MCContext &Ctx, const TargetMachine &TM);
+
+ const MCSection *getDataRelSection() const { return DataRelSection; }
+
+ /// getSectionForConstant - Given a constant with the SectionKind, return a
+ /// section that it should be placed in.
+ virtual const MCSection *getSectionForConstant(SectionKind Kind) const;
+
+
+ virtual const MCSection *
+ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const;
+
+ virtual const MCSection *
+ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const;
+
+ /// getSymbolForDwarfGlobalReference - Return an MCExpr to use for a reference
+ /// to the specified global variable from exception handling information.
+ ///
+ virtual const MCExpr *
+ getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
+ MachineModuleInfo *MMI, unsigned Encoding) const;
+};
+
+
+
+class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile {
+ mutable void *UniquingMap;
+
+ const MCSection *CStringSection;
+ const MCSection *UStringSection;
+ const MCSection *TextCoalSection;
+ const MCSection *ConstTextCoalSection;
+ const MCSection *ConstDataCoalSection;
+ const MCSection *ConstDataSection;
+ const MCSection *DataCoalSection;
+ const MCSection *DataCommonSection;
+ const MCSection *DataBSSSection;
+ const MCSection *FourByteConstantSection;
+ const MCSection *EightByteConstantSection;
+ const MCSection *SixteenByteConstantSection;
+
+ const MCSection *LazySymbolPointerSection;
+ const MCSection *NonLazySymbolPointerSection;
+public:
+ TargetLoweringObjectFileMachO() : UniquingMap(0) {}
+ ~TargetLoweringObjectFileMachO();
+
+ virtual void Initialize(MCContext &Ctx, const TargetMachine &TM);
+
+ virtual const MCSection *
+ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const;
+
+ virtual const MCSection *
+ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const;
+
+ virtual const MCSection *getSectionForConstant(SectionKind Kind) const;
+
+ /// shouldEmitUsedDirectiveFor - This hook allows targets to selectively
+ /// decide not to emit the UsedDirective for some symbols in llvm.used.
+ /// FIXME: REMOVE this (rdar://7071300)
+ virtual bool shouldEmitUsedDirectiveFor(const GlobalValue *GV,
+ Mangler *) const;
+
+ /// getMachOSection - Return the MCSection for the specified mach-o section.
+ /// This requires the operands to be valid.
+ const MCSectionMachO *getMachOSection(StringRef Segment,
+ StringRef Section,
+ unsigned TypeAndAttributes,
+ SectionKind K) const {
+ return getMachOSection(Segment, Section, TypeAndAttributes, 0, K);
+ }
+ const MCSectionMachO *getMachOSection(StringRef Segment,
+ StringRef Section,
+ unsigned TypeAndAttributes,
+ unsigned Reserved2,
+ SectionKind K) const;
+
+ /// getTextCoalSection - Return the "__TEXT,__textcoal_nt" section we put weak
+ /// text symbols into.
+ const MCSection *getTextCoalSection() const {
+ return TextCoalSection;
+ }
+
+ /// getConstTextCoalSection - Return the "__TEXT,__const_coal" section
+ /// we put weak read-only symbols into.
+ const MCSection *getConstTextCoalSection() const {
+ return ConstTextCoalSection;
+ }
+
+ /// getLazySymbolPointerSection - Return the section corresponding to
+ /// the .lazy_symbol_pointer directive.
+ const MCSection *getLazySymbolPointerSection() const {
+ return LazySymbolPointerSection;
+ }
+
+ /// getNonLazySymbolPointerSection - Return the section corresponding to
+ /// the .non_lazy_symbol_pointer directive.
+ const MCSection *getNonLazySymbolPointerSection() const {
+ return NonLazySymbolPointerSection;
+ }
+
+ /// getSymbolForDwarfGlobalReference - The mach-o version of this method
+ /// defaults to returning a stub reference.
+ virtual const MCExpr *
+ getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
+ MachineModuleInfo *MMI, unsigned Encoding) const;
+};
+
+
+
+class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
+ mutable void *UniquingMap;
+public:
+ TargetLoweringObjectFileCOFF() : UniquingMap(0) {}
+ ~TargetLoweringObjectFileCOFF();
+
+ virtual void Initialize(MCContext &Ctx, const TargetMachine &TM);
+
+ virtual const MCSection *
+ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const;
+
+ virtual const MCSection *
+ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const;
+
+ /// getCOFFSection - Return the MCSection for the specified COFF section.
+ /// FIXME: Switch this to a semantic view eventually.
+ const MCSection *getCOFFSection(StringRef Name, bool isDirective,
+ SectionKind K) const;
+};
+
+} // end namespace llvm
+
+#endif
SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler *Mang, const TargetMachine &TM) const;
};
-
-
-
-
-class TargetLoweringObjectFileELF : public TargetLoweringObjectFile {
- mutable void *UniquingMap;
-protected:
- /// TLSDataSection - Section directive for Thread Local data.
- ///
- const MCSection *TLSDataSection; // Defaults to ".tdata".
-
- /// TLSBSSSection - Section directive for Thread Local uninitialized data.
- /// Null if this target doesn't support a BSS section.
- ///
- const MCSection *TLSBSSSection; // Defaults to ".tbss".
-
- const MCSection *DataRelSection;
- const MCSection *DataRelLocalSection;
- const MCSection *DataRelROSection;
- const MCSection *DataRelROLocalSection;
-
- const MCSection *MergeableConst4Section;
- const MCSection *MergeableConst8Section;
- const MCSection *MergeableConst16Section;
-
-protected:
- const MCSection *getELFSection(StringRef Section, unsigned Type,
- unsigned Flags, SectionKind Kind,
- bool IsExplicit = false) const;
-public:
- TargetLoweringObjectFileELF() : UniquingMap(0) {}
- ~TargetLoweringObjectFileELF();
-
- virtual void Initialize(MCContext &Ctx, const TargetMachine &TM);
-
- const MCSection *getDataRelSection() const { return DataRelSection; }
-
- /// getSectionForConstant - Given a constant with the SectionKind, return a
- /// section that it should be placed in.
- virtual const MCSection *getSectionForConstant(SectionKind Kind) const;
-
-
- virtual const MCSection *
- getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const;
-
- virtual const MCSection *
- SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const;
-
- /// getSymbolForDwarfGlobalReference - Return an MCExpr to use for a reference
- /// to the specified global variable from exception handling information.
- ///
- virtual const MCExpr *
- getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
- MachineModuleInfo *MMI, unsigned Encoding) const;
-};
-
-
-
-class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile {
- mutable void *UniquingMap;
-
- const MCSection *CStringSection;
- const MCSection *UStringSection;
- const MCSection *TextCoalSection;
- const MCSection *ConstTextCoalSection;
- const MCSection *ConstDataCoalSection;
- const MCSection *ConstDataSection;
- const MCSection *DataCoalSection;
- const MCSection *DataCommonSection;
- const MCSection *DataBSSSection;
- const MCSection *FourByteConstantSection;
- const MCSection *EightByteConstantSection;
- const MCSection *SixteenByteConstantSection;
-
- const MCSection *LazySymbolPointerSection;
- const MCSection *NonLazySymbolPointerSection;
-public:
- TargetLoweringObjectFileMachO() : UniquingMap(0) {}
- ~TargetLoweringObjectFileMachO();
-
- virtual void Initialize(MCContext &Ctx, const TargetMachine &TM);
-
- virtual const MCSection *
- SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const;
-
- virtual const MCSection *
- getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const;
-
- virtual const MCSection *getSectionForConstant(SectionKind Kind) const;
-
- /// shouldEmitUsedDirectiveFor - This hook allows targets to selectively
- /// decide not to emit the UsedDirective for some symbols in llvm.used.
- /// FIXME: REMOVE this (rdar://7071300)
- virtual bool shouldEmitUsedDirectiveFor(const GlobalValue *GV,
- Mangler *) const;
-
- /// getMachOSection - Return the MCSection for the specified mach-o section.
- /// This requires the operands to be valid.
- const MCSectionMachO *getMachOSection(StringRef Segment,
- StringRef Section,
- unsigned TypeAndAttributes,
- SectionKind K) const {
- return getMachOSection(Segment, Section, TypeAndAttributes, 0, K);
- }
- const MCSectionMachO *getMachOSection(StringRef Segment,
- StringRef Section,
- unsigned TypeAndAttributes,
- unsigned Reserved2,
- SectionKind K) const;
-
- /// getTextCoalSection - Return the "__TEXT,__textcoal_nt" section we put weak
- /// text symbols into.
- const MCSection *getTextCoalSection() const {
- return TextCoalSection;
- }
-
- /// getConstTextCoalSection - Return the "__TEXT,__const_coal" section
- /// we put weak read-only symbols into.
- const MCSection *getConstTextCoalSection() const {
- return ConstTextCoalSection;
- }
-
- /// getLazySymbolPointerSection - Return the section corresponding to
- /// the .lazy_symbol_pointer directive.
- const MCSection *getLazySymbolPointerSection() const {
- return LazySymbolPointerSection;
- }
-
- /// getNonLazySymbolPointerSection - Return the section corresponding to
- /// the .non_lazy_symbol_pointer directive.
- const MCSection *getNonLazySymbolPointerSection() const {
- return NonLazySymbolPointerSection;
- }
-
- /// getSymbolForDwarfGlobalReference - The mach-o version of this method
- /// defaults to returning a stub reference.
- virtual const MCExpr *
- getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
- MachineModuleInfo *MMI, unsigned Encoding) const;
-};
-
-
-
-class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
- mutable void *UniquingMap;
-public:
- TargetLoweringObjectFileCOFF() : UniquingMap(0) {}
- ~TargetLoweringObjectFileCOFF();
-
- virtual void Initialize(MCContext &Ctx, const TargetMachine &TM);
-
- virtual const MCSection *
- getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const;
-
- virtual const MCSection *
- SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const;
-
- /// getCOFFSection - Return the MCSection for the specified COFF section.
- /// FIXME: Switch this to a semantic view eventually.
- const MCSection *getCOFFSection(StringRef Name, bool isDirective,
- SectionKind K) const;
-};
} // end namespace llvm
--- /dev/null
+//===-- llvm/CodeGen/TargetLoweringObjectFileImpl.cpp - Object File Info --===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements classes used to handle lowerings specific to common
+// object file formats.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Function.h"
+#include "llvm/GlobalVariable.h"
+#include "llvm/CodeGen/MachineModuleInfoImpls.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCSectionMachO.h"
+#include "llvm/MC/MCSectionELF.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Target/Mangler.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
+using namespace llvm;
+
+//===----------------------------------------------------------------------===//
+// ELF
+//===----------------------------------------------------------------------===//
+typedef StringMap<const MCSectionELF*> ELFUniqueMapTy;
+
+TargetLoweringObjectFileELF::~TargetLoweringObjectFileELF() {
+ // If we have the section uniquing map, free it.
+ delete (ELFUniqueMapTy*)UniquingMap;
+}
+
+const MCSection *TargetLoweringObjectFileELF::
+getELFSection(StringRef Section, unsigned Type, unsigned Flags,
+ SectionKind Kind, bool IsExplicit) const {
+ if (UniquingMap == 0)
+ UniquingMap = new ELFUniqueMapTy();
+ ELFUniqueMapTy &Map = *(ELFUniqueMapTy*)UniquingMap;
+
+ // Do the lookup, if we have a hit, return it.
+ const MCSectionELF *&Entry = Map[Section];
+ if (Entry) return Entry;
+
+ return Entry = MCSectionELF::Create(Section, Type, Flags, Kind, IsExplicit,
+ getContext());
+}
+
+void TargetLoweringObjectFileELF::Initialize(MCContext &Ctx,
+ const TargetMachine &TM) {
+ if (UniquingMap != 0)
+ ((ELFUniqueMapTy*)UniquingMap)->clear();
+ TargetLoweringObjectFile::Initialize(Ctx, TM);
+
+ BSSSection =
+ getELFSection(".bss", MCSectionELF::SHT_NOBITS,
+ MCSectionELF::SHF_WRITE | MCSectionELF::SHF_ALLOC,
+ SectionKind::getBSS());
+
+ TextSection =
+ getELFSection(".text", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_EXECINSTR | MCSectionELF::SHF_ALLOC,
+ SectionKind::getText());
+
+ DataSection =
+ getELFSection(".data", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_WRITE | MCSectionELF::SHF_ALLOC,
+ SectionKind::getDataRel());
+
+ ReadOnlySection =
+ getELFSection(".rodata", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC,
+ SectionKind::getReadOnly());
+
+ TLSDataSection =
+ getELFSection(".tdata", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_TLS |
+ MCSectionELF::SHF_WRITE, SectionKind::getThreadData());
+
+ TLSBSSSection =
+ getELFSection(".tbss", MCSectionELF::SHT_NOBITS,
+ MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_TLS |
+ MCSectionELF::SHF_WRITE, SectionKind::getThreadBSS());
+
+ DataRelSection =
+ getELFSection(".data.rel", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
+ SectionKind::getDataRel());
+
+ DataRelLocalSection =
+ getELFSection(".data.rel.local", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
+ SectionKind::getDataRelLocal());
+
+ DataRelROSection =
+ getELFSection(".data.rel.ro", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
+ SectionKind::getReadOnlyWithRel());
+
+ DataRelROLocalSection =
+ getELFSection(".data.rel.ro.local", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
+ SectionKind::getReadOnlyWithRelLocal());
+
+ MergeableConst4Section =
+ getELFSection(".rodata.cst4", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_MERGE,
+ SectionKind::getMergeableConst4());
+
+ MergeableConst8Section =
+ getELFSection(".rodata.cst8", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_MERGE,
+ SectionKind::getMergeableConst8());
+
+ MergeableConst16Section =
+ getELFSection(".rodata.cst16", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_MERGE,
+ SectionKind::getMergeableConst16());
+
+ StaticCtorSection =
+ getELFSection(".ctors", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
+ SectionKind::getDataRel());
+
+ StaticDtorSection =
+ getELFSection(".dtors", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
+ SectionKind::getDataRel());
+
+ // Exception Handling Sections.
+
+ // FIXME: We're emitting LSDA info into a readonly section on ELF, even though
+ // it contains relocatable pointers. In PIC mode, this is probably a big
+ // runtime hit for C++ apps. Either the contents of the LSDA need to be
+ // adjusted or this should be a data section.
+ LSDASection =
+ getELFSection(".gcc_except_table", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC, SectionKind::getReadOnly());
+ EHFrameSection =
+ getELFSection(".eh_frame", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
+ SectionKind::getDataRel());
+
+ // Debug Info Sections.
+ DwarfAbbrevSection =
+ getELFSection(".debug_abbrev", MCSectionELF::SHT_PROGBITS, 0,
+ SectionKind::getMetadata());
+ DwarfInfoSection =
+ getELFSection(".debug_info", MCSectionELF::SHT_PROGBITS, 0,
+ SectionKind::getMetadata());
+ DwarfLineSection =
+ getELFSection(".debug_line", MCSectionELF::SHT_PROGBITS, 0,
+ SectionKind::getMetadata());
+ DwarfFrameSection =
+ getELFSection(".debug_frame", MCSectionELF::SHT_PROGBITS, 0,
+ SectionKind::getMetadata());
+ DwarfPubNamesSection =
+ getELFSection(".debug_pubnames", MCSectionELF::SHT_PROGBITS, 0,
+ SectionKind::getMetadata());
+ DwarfPubTypesSection =
+ getELFSection(".debug_pubtypes", MCSectionELF::SHT_PROGBITS, 0,
+ SectionKind::getMetadata());
+ DwarfStrSection =
+ getELFSection(".debug_str", MCSectionELF::SHT_PROGBITS, 0,
+ SectionKind::getMetadata());
+ DwarfLocSection =
+ getELFSection(".debug_loc", MCSectionELF::SHT_PROGBITS, 0,
+ SectionKind::getMetadata());
+ DwarfARangesSection =
+ getELFSection(".debug_aranges", MCSectionELF::SHT_PROGBITS, 0,
+ SectionKind::getMetadata());
+ DwarfRangesSection =
+ getELFSection(".debug_ranges", MCSectionELF::SHT_PROGBITS, 0,
+ SectionKind::getMetadata());
+ DwarfMacroInfoSection =
+ getELFSection(".debug_macinfo", MCSectionELF::SHT_PROGBITS, 0,
+ SectionKind::getMetadata());
+}
+
+
+static SectionKind
+getELFKindForNamedSection(StringRef Name, SectionKind K) {
+ if (Name.empty() || Name[0] != '.') return K;
+
+ // Some lame default implementation based on some magic section names.
+ if (Name == ".bss" ||
+ Name.startswith(".bss.") ||
+ Name.startswith(".gnu.linkonce.b.") ||
+ Name.startswith(".llvm.linkonce.b.") ||
+ Name == ".sbss" ||
+ Name.startswith(".sbss.") ||
+ Name.startswith(".gnu.linkonce.sb.") ||
+ Name.startswith(".llvm.linkonce.sb."))
+ return SectionKind::getBSS();
+
+ if (Name == ".tdata" ||
+ Name.startswith(".tdata.") ||
+ Name.startswith(".gnu.linkonce.td.") ||
+ Name.startswith(".llvm.linkonce.td."))
+ return SectionKind::getThreadData();
+
+ if (Name == ".tbss" ||
+ Name.startswith(".tbss.") ||
+ Name.startswith(".gnu.linkonce.tb.") ||
+ Name.startswith(".llvm.linkonce.tb."))
+ return SectionKind::getThreadBSS();
+
+ return K;
+}
+
+
+static unsigned getELFSectionType(StringRef Name, SectionKind K) {
+
+ if (Name == ".init_array")
+ return MCSectionELF::SHT_INIT_ARRAY;
+
+ if (Name == ".fini_array")
+ return MCSectionELF::SHT_FINI_ARRAY;
+
+ if (Name == ".preinit_array")
+ return MCSectionELF::SHT_PREINIT_ARRAY;
+
+ if (K.isBSS() || K.isThreadBSS())
+ return MCSectionELF::SHT_NOBITS;
+
+ return MCSectionELF::SHT_PROGBITS;
+}
+
+
+static unsigned
+getELFSectionFlags(SectionKind K) {
+ unsigned Flags = 0;
+
+ if (!K.isMetadata())
+ Flags |= MCSectionELF::SHF_ALLOC;
+
+ if (K.isText())
+ Flags |= MCSectionELF::SHF_EXECINSTR;
+
+ if (K.isWriteable())
+ Flags |= MCSectionELF::SHF_WRITE;
+
+ if (K.isThreadLocal())
+ Flags |= MCSectionELF::SHF_TLS;
+
+ // K.isMergeableConst() is left out to honour PR4650
+ if (K.isMergeableCString() || K.isMergeableConst4() ||
+ K.isMergeableConst8() || K.isMergeableConst16())
+ Flags |= MCSectionELF::SHF_MERGE;
+
+ if (K.isMergeableCString())
+ Flags |= MCSectionELF::SHF_STRINGS;
+
+ return Flags;
+}
+
+
+const MCSection *TargetLoweringObjectFileELF::
+getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const {
+ StringRef SectionName = GV->getSection();
+
+ // Infer section flags from the section name if we can.
+ Kind = getELFKindForNamedSection(SectionName, Kind);
+
+ return getELFSection(SectionName,
+ getELFSectionType(SectionName, Kind),
+ getELFSectionFlags(Kind), Kind, true);
+}
+
+static const char *getSectionPrefixForUniqueGlobal(SectionKind Kind) {
+ if (Kind.isText()) return ".gnu.linkonce.t.";
+ if (Kind.isReadOnly()) return ".gnu.linkonce.r.";
+
+ if (Kind.isThreadData()) return ".gnu.linkonce.td.";
+ if (Kind.isThreadBSS()) return ".gnu.linkonce.tb.";
+
+ if (Kind.isDataNoRel()) return ".gnu.linkonce.d.";
+ if (Kind.isDataRelLocal()) return ".gnu.linkonce.d.rel.local.";
+ if (Kind.isDataRel()) return ".gnu.linkonce.d.rel.";
+ if (Kind.isReadOnlyWithRelLocal()) return ".gnu.linkonce.d.rel.ro.local.";
+
+ assert(Kind.isReadOnlyWithRel() && "Unknown section kind");
+ return ".gnu.linkonce.d.rel.ro.";
+}
+
+const MCSection *TargetLoweringObjectFileELF::
+SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const {
+
+ // If this global is linkonce/weak and the target handles this by emitting it
+ // into a 'uniqued' section name, create and return the section now.
+ if (GV->isWeakForLinker() && !Kind.isCommon() && !Kind.isBSS()) {
+ const char *Prefix = getSectionPrefixForUniqueGlobal(Kind);
+ SmallString<128> Name;
+ Name.append(Prefix, Prefix+strlen(Prefix));
+ Mang->getNameWithPrefix(Name, GV, false);
+ return getELFSection(Name.str(), getELFSectionType(Name.str(), Kind),
+ getELFSectionFlags(Kind), Kind);
+ }
+
+ if (Kind.isText()) return TextSection;
+
+ if (Kind.isMergeable1ByteCString() ||
+ Kind.isMergeable2ByteCString() ||
+ Kind.isMergeable4ByteCString()) {
+
+ // We also need alignment here.
+ // FIXME: this is getting the alignment of the character, not the
+ // alignment of the global!
+ unsigned Align =
+ TM.getTargetData()->getPreferredAlignment(cast<GlobalVariable>(GV));
+
+ const char *SizeSpec = ".rodata.str1.";
+ if (Kind.isMergeable2ByteCString())
+ SizeSpec = ".rodata.str2.";
+ else if (Kind.isMergeable4ByteCString())
+ SizeSpec = ".rodata.str4.";
+ else
+ assert(Kind.isMergeable1ByteCString() && "unknown string width");
+
+
+ std::string Name = SizeSpec + utostr(Align);
+ return getELFSection(Name, MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC |
+ MCSectionELF::SHF_MERGE |
+ MCSectionELF::SHF_STRINGS,
+ Kind);
+ }
+
+ if (Kind.isMergeableConst()) {
+ if (Kind.isMergeableConst4() && MergeableConst4Section)
+ return MergeableConst4Section;
+ if (Kind.isMergeableConst8() && MergeableConst8Section)
+ return MergeableConst8Section;
+ if (Kind.isMergeableConst16() && MergeableConst16Section)
+ return MergeableConst16Section;
+ return ReadOnlySection; // .const
+ }
+
+ if (Kind.isReadOnly()) return ReadOnlySection;
+
+ if (Kind.isThreadData()) return TLSDataSection;
+ if (Kind.isThreadBSS()) return TLSBSSSection;
+
+ // Note: we claim that common symbols are put in BSSSection, but they are
+ // really emitted with the magic .comm directive, which creates a symbol table
+ // entry but not a section.
+ if (Kind.isBSS() || Kind.isCommon()) return BSSSection;
+
+ if (Kind.isDataNoRel()) return DataSection;
+ if (Kind.isDataRelLocal()) return DataRelLocalSection;
+ if (Kind.isDataRel()) return DataRelSection;
+ if (Kind.isReadOnlyWithRelLocal()) return DataRelROLocalSection;
+
+ assert(Kind.isReadOnlyWithRel() && "Unknown section kind");
+ return DataRelROSection;
+}
+
+/// getSectionForConstant - Given a mergeable constant with the
+/// specified size and relocation information, return a section that it
+/// should be placed in.
+const MCSection *TargetLoweringObjectFileELF::
+getSectionForConstant(SectionKind Kind) const {
+ if (Kind.isMergeableConst4() && MergeableConst4Section)
+ return MergeableConst4Section;
+ if (Kind.isMergeableConst8() && MergeableConst8Section)
+ return MergeableConst8Section;
+ if (Kind.isMergeableConst16() && MergeableConst16Section)
+ return MergeableConst16Section;
+ if (Kind.isReadOnly())
+ return ReadOnlySection;
+
+ if (Kind.isReadOnlyWithRelLocal()) return DataRelROLocalSection;
+ assert(Kind.isReadOnlyWithRel() && "Unknown section kind");
+ return DataRelROSection;
+}
+
+const MCExpr *TargetLoweringObjectFileELF::
+getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
+ MachineModuleInfo *MMI, unsigned Encoding) const {
+
+ if (Encoding & dwarf::DW_EH_PE_indirect) {
+ MachineModuleInfoELF &ELFMMI = MMI->getObjFileInfo<MachineModuleInfoELF>();
+
+ SmallString<128> Name;
+ Mang->getNameWithPrefix(Name, GV, true);
+ Name += ".DW.stub";
+
+ // Add information about the stub reference to ELFMMI so that the stub
+ // gets emitted by the asmprinter.
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name.str());
+ MCSymbol *&StubSym = ELFMMI.getGVStubEntry(Sym);
+ if (StubSym == 0) {
+ Name.clear();
+ Mang->getNameWithPrefix(Name, GV, false);
+ StubSym = getContext().GetOrCreateSymbol(Name.str());
+ }
+
+ return TargetLoweringObjectFile::
+ getSymbolForDwarfReference(Sym, MMI,
+ Encoding & ~dwarf::DW_EH_PE_indirect);
+ }
+
+ return TargetLoweringObjectFile::
+ getSymbolForDwarfGlobalReference(GV, Mang, MMI, Encoding);
+}
+
+//===----------------------------------------------------------------------===//
+// MachO
+//===----------------------------------------------------------------------===//
+
+typedef StringMap<const MCSectionMachO*> MachOUniqueMapTy;
+
+TargetLoweringObjectFileMachO::~TargetLoweringObjectFileMachO() {
+ // If we have the MachO uniquing map, free it.
+ delete (MachOUniqueMapTy*)UniquingMap;
+}
+
+
+const MCSectionMachO *TargetLoweringObjectFileMachO::
+getMachOSection(StringRef Segment, StringRef Section,
+ unsigned TypeAndAttributes,
+ unsigned Reserved2, SectionKind Kind) const {
+ // We unique sections by their segment/section pair. The returned section
+ // may not have the same flags as the requested section, if so this should be
+ // diagnosed by the client as an error.
+
+ // Create the map if it doesn't already exist.
+ if (UniquingMap == 0)
+ UniquingMap = new MachOUniqueMapTy();
+ MachOUniqueMapTy &Map = *(MachOUniqueMapTy*)UniquingMap;
+
+ // Form the name to look up.
+ SmallString<64> Name;
+ Name += Segment;
+ Name.push_back(',');
+ Name += Section;
+
+ // Do the lookup, if we have a hit, return it.
+ const MCSectionMachO *&Entry = Map[Name.str()];
+ if (Entry) return Entry;
+
+ // Otherwise, return a new section.
+ return Entry = MCSectionMachO::Create(Segment, Section, TypeAndAttributes,
+ Reserved2, Kind, getContext());
+}
+
+
+void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
+ const TargetMachine &TM) {
+ if (UniquingMap != 0)
+ ((MachOUniqueMapTy*)UniquingMap)->clear();
+ TargetLoweringObjectFile::Initialize(Ctx, TM);
+
+ TextSection // .text
+ = getMachOSection("__TEXT", "__text",
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ SectionKind::getText());
+ DataSection // .data
+ = getMachOSection("__DATA", "__data", 0, SectionKind::getDataRel());
+
+ CStringSection // .cstring
+ = getMachOSection("__TEXT", "__cstring", MCSectionMachO::S_CSTRING_LITERALS,
+ SectionKind::getMergeable1ByteCString());
+ UStringSection
+ = getMachOSection("__TEXT","__ustring", 0,
+ SectionKind::getMergeable2ByteCString());
+ FourByteConstantSection // .literal4
+ = getMachOSection("__TEXT", "__literal4", MCSectionMachO::S_4BYTE_LITERALS,
+ SectionKind::getMergeableConst4());
+ EightByteConstantSection // .literal8
+ = getMachOSection("__TEXT", "__literal8", MCSectionMachO::S_8BYTE_LITERALS,
+ SectionKind::getMergeableConst8());
+
+ // ld_classic doesn't support .literal16 in 32-bit mode, and ld64 falls back
+ // to using it in -static mode.
+ SixteenByteConstantSection = 0;
+ if (TM.getRelocationModel() != Reloc::Static &&
+ TM.getTargetData()->getPointerSize() == 32)
+ SixteenByteConstantSection = // .literal16
+ getMachOSection("__TEXT", "__literal16",MCSectionMachO::S_16BYTE_LITERALS,
+ SectionKind::getMergeableConst16());
+
+ ReadOnlySection // .const
+ = getMachOSection("__TEXT", "__const", 0, SectionKind::getReadOnly());
+
+ TextCoalSection
+ = getMachOSection("__TEXT", "__textcoal_nt",
+ MCSectionMachO::S_COALESCED |
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ SectionKind::getText());
+ ConstTextCoalSection
+ = getMachOSection("__TEXT", "__const_coal", MCSectionMachO::S_COALESCED,
+ SectionKind::getText());
+ ConstDataCoalSection
+ = getMachOSection("__DATA","__const_coal", MCSectionMachO::S_COALESCED,
+ SectionKind::getText());
+ ConstDataSection // .const_data
+ = getMachOSection("__DATA", "__const", 0,
+ SectionKind::getReadOnlyWithRel());
+ DataCoalSection
+ = getMachOSection("__DATA","__datacoal_nt", MCSectionMachO::S_COALESCED,
+ SectionKind::getDataRel());
+ DataCommonSection
+ = getMachOSection("__DATA","__common", MCSectionMachO::S_ZEROFILL,
+ SectionKind::getBSS());
+ DataBSSSection
+ = getMachOSection("__DATA","__bss", MCSectionMachO::S_ZEROFILL,
+ SectionKind::getBSS());
+
+
+ LazySymbolPointerSection
+ = getMachOSection("__DATA", "__la_symbol_ptr",
+ MCSectionMachO::S_LAZY_SYMBOL_POINTERS,
+ SectionKind::getMetadata());
+ NonLazySymbolPointerSection
+ = getMachOSection("__DATA", "__nl_symbol_ptr",
+ MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
+ SectionKind::getMetadata());
+
+ if (TM.getRelocationModel() == Reloc::Static) {
+ StaticCtorSection
+ = getMachOSection("__TEXT", "__constructor", 0,SectionKind::getDataRel());
+ StaticDtorSection
+ = getMachOSection("__TEXT", "__destructor", 0, SectionKind::getDataRel());
+ } else {
+ StaticCtorSection
+ = getMachOSection("__DATA", "__mod_init_func",
+ MCSectionMachO::S_MOD_INIT_FUNC_POINTERS,
+ SectionKind::getDataRel());
+ StaticDtorSection
+ = getMachOSection("__DATA", "__mod_term_func",
+ MCSectionMachO::S_MOD_TERM_FUNC_POINTERS,
+ SectionKind::getDataRel());
+ }
+
+ // Exception Handling.
+ LSDASection = getMachOSection("__DATA", "__gcc_except_tab", 0,
+ SectionKind::getDataRel());
+ EHFrameSection =
+ getMachOSection("__TEXT", "__eh_frame",
+ MCSectionMachO::S_COALESCED |
+ MCSectionMachO::S_ATTR_NO_TOC |
+ MCSectionMachO::S_ATTR_STRIP_STATIC_SYMS |
+ MCSectionMachO::S_ATTR_LIVE_SUPPORT,
+ SectionKind::getReadOnly());
+
+ // Debug Information.
+ DwarfAbbrevSection =
+ getMachOSection("__DWARF", "__debug_abbrev", MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfInfoSection =
+ getMachOSection("__DWARF", "__debug_info", MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfLineSection =
+ getMachOSection("__DWARF", "__debug_line", MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfFrameSection =
+ getMachOSection("__DWARF", "__debug_frame", MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfPubNamesSection =
+ getMachOSection("__DWARF", "__debug_pubnames", MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfPubTypesSection =
+ getMachOSection("__DWARF", "__debug_pubtypes", MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfStrSection =
+ getMachOSection("__DWARF", "__debug_str", MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfLocSection =
+ getMachOSection("__DWARF", "__debug_loc", MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfARangesSection =
+ getMachOSection("__DWARF", "__debug_aranges", MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfRangesSection =
+ getMachOSection("__DWARF", "__debug_ranges", MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfMacroInfoSection =
+ getMachOSection("__DWARF", "__debug_macinfo", MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfDebugInlineSection =
+ getMachOSection("__DWARF", "__debug_inlined", MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+}
+
+const MCSection *TargetLoweringObjectFileMachO::
+getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const {
+ // Parse the section specifier and create it if valid.
+ StringRef Segment, Section;
+ unsigned TAA, StubSize;
+ std::string ErrorCode =
+ MCSectionMachO::ParseSectionSpecifier(GV->getSection(), Segment, Section,
+ TAA, StubSize);
+ if (!ErrorCode.empty()) {
+ // If invalid, report the error with llvm_report_error.
+ llvm_report_error("Global variable '" + GV->getNameStr() +
+ "' has an invalid section specifier '" + GV->getSection()+
+ "': " + ErrorCode + ".");
+ // Fall back to dropping it into the data section.
+ return DataSection;
+ }
+
+ // Get the section.
+ const MCSectionMachO *S =
+ getMachOSection(Segment, Section, TAA, StubSize, Kind);
+
+ // Okay, now that we got the section, verify that the TAA & StubSize agree.
+ // If the user declared multiple globals with different section flags, we need
+ // to reject it here.
+ if (S->getTypeAndAttributes() != TAA || S->getStubSize() != StubSize) {
+ // If invalid, report the error with llvm_report_error.
+ llvm_report_error("Global variable '" + GV->getNameStr() +
+ "' section type or attributes does not match previous"
+ " section specifier");
+ }
+
+ return S;
+}
+
+const MCSection *TargetLoweringObjectFileMachO::
+SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const {
+ assert(!Kind.isThreadLocal() && "Darwin doesn't support TLS");
+
+ if (Kind.isText())
+ return GV->isWeakForLinker() ? TextCoalSection : TextSection;
+
+ // If this is weak/linkonce, put this in a coalescable section, either in text
+ // or data depending on if it is writable.
+ if (GV->isWeakForLinker()) {
+ if (Kind.isReadOnly())
+ return ConstTextCoalSection;
+ return DataCoalSection;
+ }
+
+ // FIXME: Alignment check should be handled by section classifier.
+ if (Kind.isMergeable1ByteCString() ||
+ Kind.isMergeable2ByteCString()) {
+ if (TM.getTargetData()->getPreferredAlignment(
+ cast<GlobalVariable>(GV)) < 32) {
+ if (Kind.isMergeable1ByteCString())
+ return CStringSection;
+ assert(Kind.isMergeable2ByteCString());
+ return UStringSection;
+ }
+ }
+
+ if (Kind.isMergeableConst()) {
+ if (Kind.isMergeableConst4())
+ return FourByteConstantSection;
+ if (Kind.isMergeableConst8())
+ return EightByteConstantSection;
+ if (Kind.isMergeableConst16() && SixteenByteConstantSection)
+ return SixteenByteConstantSection;
+ }
+
+ // Otherwise, if it is readonly, but not something we can specially optimize,
+ // just drop it in .const.
+ if (Kind.isReadOnly())
+ return ReadOnlySection;
+
+ // If this is marked const, put it into a const section. But if the dynamic
+ // linker needs to write to it, put it in the data segment.
+ if (Kind.isReadOnlyWithRel())
+ return ConstDataSection;
+
+ // Put zero initialized globals with strong external linkage in the
+ // DATA, __common section with the .zerofill directive.
+ if (Kind.isBSSExtern())
+ return DataCommonSection;
+
+ // Put zero initialized globals with local linkage in __DATA,__bss directive
+ // with the .zerofill directive (aka .lcomm).
+ if (Kind.isBSSLocal())
+ return DataBSSSection;
+
+ // Otherwise, just drop the variable in the normal data section.
+ return DataSection;
+}
+
+const MCSection *
+TargetLoweringObjectFileMachO::getSectionForConstant(SectionKind Kind) const {
+ // If this constant requires a relocation, we have to put it in the data
+ // segment, not in the text segment.
+ if (Kind.isDataRel() || Kind.isReadOnlyWithRel())
+ return ConstDataSection;
+
+ if (Kind.isMergeableConst4())
+ return FourByteConstantSection;
+ if (Kind.isMergeableConst8())
+ return EightByteConstantSection;
+ if (Kind.isMergeableConst16() && SixteenByteConstantSection)
+ return SixteenByteConstantSection;
+ return ReadOnlySection; // .const
+}
+
+/// shouldEmitUsedDirectiveFor - This hook allows targets to selectively decide
+/// not to emit the UsedDirective for some symbols in llvm.used.
+// FIXME: REMOVE this (rdar://7071300)
+bool TargetLoweringObjectFileMachO::
+shouldEmitUsedDirectiveFor(const GlobalValue *GV, Mangler *Mang) const {
+ /// On Darwin, internally linked data beginning with "L" or "l" does not have
+ /// the directive emitted (this occurs in ObjC metadata).
+ if (!GV) return false;
+
+ // Check whether the mangled name has the "Private" or "LinkerPrivate" prefix.
+ if (GV->hasLocalLinkage() && !isa<Function>(GV)) {
+ // FIXME: ObjC metadata is currently emitted as internal symbols that have
+ // \1L and \0l prefixes on them. Fix them to be Private/LinkerPrivate and
+ // this horrible hack can go away.
+ SmallString<64> Name;
+ Mang->getNameWithPrefix(Name, GV, false);
+ if (Name[0] == 'L' || Name[0] == 'l')
+ return false;
+ }
+
+ return true;
+}
+
+const MCExpr *TargetLoweringObjectFileMachO::
+getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
+ MachineModuleInfo *MMI, unsigned Encoding) const {
+ // The mach-o version of this method defaults to returning a stub reference.
+
+ if (Encoding & dwarf::DW_EH_PE_indirect) {
+ SmallString<128> Name;
+ Mang->getNameWithPrefix(Name, GV, true);
+ Name += "$non_lazy_ptr";
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name.str());
+
+ return TargetLoweringObjectFile::
+ getSymbolForDwarfReference(Sym, MMI,
+ Encoding & ~dwarf::DW_EH_PE_indirect);
+ }
+
+ return TargetLoweringObjectFile::
+ getSymbolForDwarfGlobalReference(GV, Mang, MMI, Encoding);
+}
+
+
+//===----------------------------------------------------------------------===//
+// COFF
+//===----------------------------------------------------------------------===//
+
+typedef StringMap<const MCSectionCOFF*> COFFUniqueMapTy;
+
+TargetLoweringObjectFileCOFF::~TargetLoweringObjectFileCOFF() {
+ delete (COFFUniqueMapTy*)UniquingMap;
+}
+
+
+const MCSection *TargetLoweringObjectFileCOFF::
+getCOFFSection(StringRef Name, bool isDirective, SectionKind Kind) const {
+ // Create the map if it doesn't already exist.
+ if (UniquingMap == 0)
+ UniquingMap = new MachOUniqueMapTy();
+ COFFUniqueMapTy &Map = *(COFFUniqueMapTy*)UniquingMap;
+
+ // Do the lookup, if we have a hit, return it.
+ const MCSectionCOFF *&Entry = Map[Name];
+ if (Entry) return Entry;
+
+ return Entry = MCSectionCOFF::Create(Name, isDirective, Kind, getContext());
+}
+
+void TargetLoweringObjectFileCOFF::Initialize(MCContext &Ctx,
+ const TargetMachine &TM) {
+ if (UniquingMap != 0)
+ ((COFFUniqueMapTy*)UniquingMap)->clear();
+ TargetLoweringObjectFile::Initialize(Ctx, TM);
+ TextSection = getCOFFSection("\t.text", true, SectionKind::getText());
+ DataSection = getCOFFSection("\t.data", true, SectionKind::getDataRel());
+ StaticCtorSection =
+ getCOFFSection(".ctors", false, SectionKind::getDataRel());
+ StaticDtorSection =
+ getCOFFSection(".dtors", false, SectionKind::getDataRel());
+
+ // FIXME: We're emitting LSDA info into a readonly section on COFF, even
+ // though it contains relocatable pointers. In PIC mode, this is probably a
+ // big runtime hit for C++ apps. Either the contents of the LSDA need to be
+ // adjusted or this should be a data section.
+ LSDASection =
+ getCOFFSection(".gcc_except_table", false, SectionKind::getReadOnly());
+ EHFrameSection =
+ getCOFFSection(".eh_frame", false, SectionKind::getDataRel());
+
+ // Debug info.
+ // FIXME: Don't use 'directive' mode here.
+ DwarfAbbrevSection =
+ getCOFFSection("\t.section\t.debug_abbrev,\"dr\"",
+ true, SectionKind::getMetadata());
+ DwarfInfoSection =
+ getCOFFSection("\t.section\t.debug_info,\"dr\"",
+ true, SectionKind::getMetadata());
+ DwarfLineSection =
+ getCOFFSection("\t.section\t.debug_line,\"dr\"",
+ true, SectionKind::getMetadata());
+ DwarfFrameSection =
+ getCOFFSection("\t.section\t.debug_frame,\"dr\"",
+ true, SectionKind::getMetadata());
+ DwarfPubNamesSection =
+ getCOFFSection("\t.section\t.debug_pubnames,\"dr\"",
+ true, SectionKind::getMetadata());
+ DwarfPubTypesSection =
+ getCOFFSection("\t.section\t.debug_pubtypes,\"dr\"",
+ true, SectionKind::getMetadata());
+ DwarfStrSection =
+ getCOFFSection("\t.section\t.debug_str,\"dr\"",
+ true, SectionKind::getMetadata());
+ DwarfLocSection =
+ getCOFFSection("\t.section\t.debug_loc,\"dr\"",
+ true, SectionKind::getMetadata());
+ DwarfARangesSection =
+ getCOFFSection("\t.section\t.debug_aranges,\"dr\"",
+ true, SectionKind::getMetadata());
+ DwarfRangesSection =
+ getCOFFSection("\t.section\t.debug_ranges,\"dr\"",
+ true, SectionKind::getMetadata());
+ DwarfMacroInfoSection =
+ getCOFFSection("\t.section\t.debug_macinfo,\"dr\"",
+ true, SectionKind::getMetadata());
+}
+
+const MCSection *TargetLoweringObjectFileCOFF::
+getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const {
+ return getCOFFSection(GV->getSection(), false, Kind);
+}
+
+static const char *getCOFFSectionPrefixForUniqueGlobal(SectionKind Kind) {
+ if (Kind.isText())
+ return ".text$linkonce";
+ if (Kind.isWriteable())
+ return ".data$linkonce";
+ return ".rdata$linkonce";
+}
+
+
+const MCSection *TargetLoweringObjectFileCOFF::
+SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const {
+ assert(!Kind.isThreadLocal() && "Doesn't support TLS");
+
+ // If this global is linkonce/weak and the target handles this by emitting it
+ // into a 'uniqued' section name, create and return the section now.
+ if (GV->isWeakForLinker()) {
+ const char *Prefix = getCOFFSectionPrefixForUniqueGlobal(Kind);
+ SmallString<128> Name(Prefix, Prefix+strlen(Prefix));
+ Mang->getNameWithPrefix(Name, GV, false);
+ return getCOFFSection(Name.str(), false, Kind);
+ }
+
+ if (Kind.isText())
+ return getTextSection();
+
+ return getDataSection();
+}
+
#ifndef LLVM_TARGET_ARM_TARGETOBJECTFILE_H
#define LLVM_TARGET_ARM_TARGETOBJECTFILE_H
-#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/MC/MCSectionELF.h"
namespace llvm {
if (TM.getSubtarget<ARMSubtarget>().isAAPCS_ABI()) {
StaticCtorSection =
- getELFSection(".init_array", MCSectionELF::SHT_INIT_ARRAY,
+ getELFSection(".init_array", MCSectionELF::SHT_INIT_ARRAY,
MCSectionELF::SHF_WRITE | MCSectionELF::SHF_ALLOC,
SectionKind::getDataRel());
StaticDtorSection =
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegistry.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/Constants.h"
#include "llvm/Function.h"
#include "llvm/Module.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/CodeGen/SelectionDAG.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/ADT/VectorExtras.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/SelectionDAG.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/ADT/VectorExtras.h"
#include "llvm/Support/Debug.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/CodeGen/ValueTypes.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#ifndef LLVM_TARGET_MIPS_TARGETOBJECTFILE_H
#define LLVM_TARGET_MIPS_TARGETOBJECTFILE_H
-#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
namespace llvm {
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/Mangler.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/CodeGen/SelectionDAG.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/CallingConv.h"
#include "llvm/Constants.h"
#include "llvm/Function.h"
#include "llvm/Intrinsics.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Target/TargetOptions.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/SelectionDAG.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/ADT/VectorExtras.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/Target/TargetOptions.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/GlobalVariable.h"
-#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCSectionMachO.h"
-#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/StringExtras.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
return dwarf::DW_EH_PE_absptr;
}
-//===----------------------------------------------------------------------===//
-// ELF
-//===----------------------------------------------------------------------===//
-typedef StringMap<const MCSectionELF*> ELFUniqueMapTy;
-
-TargetLoweringObjectFileELF::~TargetLoweringObjectFileELF() {
- // If we have the section uniquing map, free it.
- delete (ELFUniqueMapTy*)UniquingMap;
-}
-
-const MCSection *TargetLoweringObjectFileELF::
-getELFSection(StringRef Section, unsigned Type, unsigned Flags,
- SectionKind Kind, bool IsExplicit) const {
- if (UniquingMap == 0)
- UniquingMap = new ELFUniqueMapTy();
- ELFUniqueMapTy &Map = *(ELFUniqueMapTy*)UniquingMap;
-
- // Do the lookup, if we have a hit, return it.
- const MCSectionELF *&Entry = Map[Section];
- if (Entry) return Entry;
-
- return Entry = MCSectionELF::Create(Section, Type, Flags, Kind, IsExplicit,
- getContext());
-}
-
-void TargetLoweringObjectFileELF::Initialize(MCContext &Ctx,
- const TargetMachine &TM) {
- if (UniquingMap != 0)
- ((ELFUniqueMapTy*)UniquingMap)->clear();
- TargetLoweringObjectFile::Initialize(Ctx, TM);
-
- BSSSection =
- getELFSection(".bss", MCSectionELF::SHT_NOBITS,
- MCSectionELF::SHF_WRITE | MCSectionELF::SHF_ALLOC,
- SectionKind::getBSS());
-
- TextSection =
- getELFSection(".text", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_EXECINSTR | MCSectionELF::SHF_ALLOC,
- SectionKind::getText());
-
- DataSection =
- getELFSection(".data", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_WRITE | MCSectionELF::SHF_ALLOC,
- SectionKind::getDataRel());
-
- ReadOnlySection =
- getELFSection(".rodata", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC,
- SectionKind::getReadOnly());
-
- TLSDataSection =
- getELFSection(".tdata", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_TLS |
- MCSectionELF::SHF_WRITE, SectionKind::getThreadData());
-
- TLSBSSSection =
- getELFSection(".tbss", MCSectionELF::SHT_NOBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_TLS |
- MCSectionELF::SHF_WRITE, SectionKind::getThreadBSS());
-
- DataRelSection =
- getELFSection(".data.rel", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
- SectionKind::getDataRel());
-
- DataRelLocalSection =
- getELFSection(".data.rel.local", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
- SectionKind::getDataRelLocal());
-
- DataRelROSection =
- getELFSection(".data.rel.ro", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
- SectionKind::getReadOnlyWithRel());
-
- DataRelROLocalSection =
- getELFSection(".data.rel.ro.local", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
- SectionKind::getReadOnlyWithRelLocal());
-
- MergeableConst4Section =
- getELFSection(".rodata.cst4", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_MERGE,
- SectionKind::getMergeableConst4());
-
- MergeableConst8Section =
- getELFSection(".rodata.cst8", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_MERGE,
- SectionKind::getMergeableConst8());
-
- MergeableConst16Section =
- getELFSection(".rodata.cst16", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_MERGE,
- SectionKind::getMergeableConst16());
-
- StaticCtorSection =
- getELFSection(".ctors", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
- SectionKind::getDataRel());
-
- StaticDtorSection =
- getELFSection(".dtors", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
- SectionKind::getDataRel());
-
- // Exception Handling Sections.
-
- // FIXME: We're emitting LSDA info into a readonly section on ELF, even though
- // it contains relocatable pointers. In PIC mode, this is probably a big
- // runtime hit for C++ apps. Either the contents of the LSDA need to be
- // adjusted or this should be a data section.
- LSDASection =
- getELFSection(".gcc_except_table", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC, SectionKind::getReadOnly());
- EHFrameSection =
- getELFSection(".eh_frame", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE,
- SectionKind::getDataRel());
-
- // Debug Info Sections.
- DwarfAbbrevSection =
- getELFSection(".debug_abbrev", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfInfoSection =
- getELFSection(".debug_info", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfLineSection =
- getELFSection(".debug_line", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfFrameSection =
- getELFSection(".debug_frame", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfPubNamesSection =
- getELFSection(".debug_pubnames", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfPubTypesSection =
- getELFSection(".debug_pubtypes", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfStrSection =
- getELFSection(".debug_str", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfLocSection =
- getELFSection(".debug_loc", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfARangesSection =
- getELFSection(".debug_aranges", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfRangesSection =
- getELFSection(".debug_ranges", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfMacroInfoSection =
- getELFSection(".debug_macinfo", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
-}
-
-
-static SectionKind
-getELFKindForNamedSection(StringRef Name, SectionKind K) {
- if (Name.empty() || Name[0] != '.') return K;
-
- // Some lame default implementation based on some magic section names.
- if (Name == ".bss" ||
- Name.startswith(".bss.") ||
- Name.startswith(".gnu.linkonce.b.") ||
- Name.startswith(".llvm.linkonce.b.") ||
- Name == ".sbss" ||
- Name.startswith(".sbss.") ||
- Name.startswith(".gnu.linkonce.sb.") ||
- Name.startswith(".llvm.linkonce.sb."))
- return SectionKind::getBSS();
-
- if (Name == ".tdata" ||
- Name.startswith(".tdata.") ||
- Name.startswith(".gnu.linkonce.td.") ||
- Name.startswith(".llvm.linkonce.td."))
- return SectionKind::getThreadData();
-
- if (Name == ".tbss" ||
- Name.startswith(".tbss.") ||
- Name.startswith(".gnu.linkonce.tb.") ||
- Name.startswith(".llvm.linkonce.tb."))
- return SectionKind::getThreadBSS();
-
- return K;
-}
-
-
-static unsigned getELFSectionType(StringRef Name, SectionKind K) {
-
- if (Name == ".init_array")
- return MCSectionELF::SHT_INIT_ARRAY;
-
- if (Name == ".fini_array")
- return MCSectionELF::SHT_FINI_ARRAY;
-
- if (Name == ".preinit_array")
- return MCSectionELF::SHT_PREINIT_ARRAY;
-
- if (K.isBSS() || K.isThreadBSS())
- return MCSectionELF::SHT_NOBITS;
-
- return MCSectionELF::SHT_PROGBITS;
-}
-
-
-static unsigned
-getELFSectionFlags(SectionKind K) {
- unsigned Flags = 0;
-
- if (!K.isMetadata())
- Flags |= MCSectionELF::SHF_ALLOC;
-
- if (K.isText())
- Flags |= MCSectionELF::SHF_EXECINSTR;
-
- if (K.isWriteable())
- Flags |= MCSectionELF::SHF_WRITE;
-
- if (K.isThreadLocal())
- Flags |= MCSectionELF::SHF_TLS;
-
- // K.isMergeableConst() is left out to honour PR4650
- if (K.isMergeableCString() || K.isMergeableConst4() ||
- K.isMergeableConst8() || K.isMergeableConst16())
- Flags |= MCSectionELF::SHF_MERGE;
-
- if (K.isMergeableCString())
- Flags |= MCSectionELF::SHF_STRINGS;
-
- return Flags;
-}
-
-
-const MCSection *TargetLoweringObjectFileELF::
-getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const {
- StringRef SectionName = GV->getSection();
-
- // Infer section flags from the section name if we can.
- Kind = getELFKindForNamedSection(SectionName, Kind);
-
- return getELFSection(SectionName,
- getELFSectionType(SectionName, Kind),
- getELFSectionFlags(Kind), Kind, true);
-}
-
-static const char *getSectionPrefixForUniqueGlobal(SectionKind Kind) {
- if (Kind.isText()) return ".gnu.linkonce.t.";
- if (Kind.isReadOnly()) return ".gnu.linkonce.r.";
-
- if (Kind.isThreadData()) return ".gnu.linkonce.td.";
- if (Kind.isThreadBSS()) return ".gnu.linkonce.tb.";
-
- if (Kind.isDataNoRel()) return ".gnu.linkonce.d.";
- if (Kind.isDataRelLocal()) return ".gnu.linkonce.d.rel.local.";
- if (Kind.isDataRel()) return ".gnu.linkonce.d.rel.";
- if (Kind.isReadOnlyWithRelLocal()) return ".gnu.linkonce.d.rel.ro.local.";
-
- assert(Kind.isReadOnlyWithRel() && "Unknown section kind");
- return ".gnu.linkonce.d.rel.ro.";
-}
-
-const MCSection *TargetLoweringObjectFileELF::
-SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const {
-
- // If this global is linkonce/weak and the target handles this by emitting it
- // into a 'uniqued' section name, create and return the section now.
- if (GV->isWeakForLinker() && !Kind.isCommon() && !Kind.isBSS()) {
- const char *Prefix = getSectionPrefixForUniqueGlobal(Kind);
- SmallString<128> Name;
- Name.append(Prefix, Prefix+strlen(Prefix));
- Mang->getNameWithPrefix(Name, GV, false);
- return getELFSection(Name.str(), getELFSectionType(Name.str(), Kind),
- getELFSectionFlags(Kind), Kind);
- }
-
- if (Kind.isText()) return TextSection;
-
- if (Kind.isMergeable1ByteCString() ||
- Kind.isMergeable2ByteCString() ||
- Kind.isMergeable4ByteCString()) {
-
- // We also need alignment here.
- // FIXME: this is getting the alignment of the character, not the
- // alignment of the global!
- unsigned Align =
- TM.getTargetData()->getPreferredAlignment(cast<GlobalVariable>(GV));
-
- const char *SizeSpec = ".rodata.str1.";
- if (Kind.isMergeable2ByteCString())
- SizeSpec = ".rodata.str2.";
- else if (Kind.isMergeable4ByteCString())
- SizeSpec = ".rodata.str4.";
- else
- assert(Kind.isMergeable1ByteCString() && "unknown string width");
-
-
- std::string Name = SizeSpec + utostr(Align);
- return getELFSection(Name, MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC |
- MCSectionELF::SHF_MERGE |
- MCSectionELF::SHF_STRINGS,
- Kind);
- }
-
- if (Kind.isMergeableConst()) {
- if (Kind.isMergeableConst4() && MergeableConst4Section)
- return MergeableConst4Section;
- if (Kind.isMergeableConst8() && MergeableConst8Section)
- return MergeableConst8Section;
- if (Kind.isMergeableConst16() && MergeableConst16Section)
- return MergeableConst16Section;
- return ReadOnlySection; // .const
- }
-
- if (Kind.isReadOnly()) return ReadOnlySection;
-
- if (Kind.isThreadData()) return TLSDataSection;
- if (Kind.isThreadBSS()) return TLSBSSSection;
-
- // Note: we claim that common symbols are put in BSSSection, but they are
- // really emitted with the magic .comm directive, which creates a symbol table
- // entry but not a section.
- if (Kind.isBSS() || Kind.isCommon()) return BSSSection;
-
- if (Kind.isDataNoRel()) return DataSection;
- if (Kind.isDataRelLocal()) return DataRelLocalSection;
- if (Kind.isDataRel()) return DataRelSection;
- if (Kind.isReadOnlyWithRelLocal()) return DataRelROLocalSection;
-
- assert(Kind.isReadOnlyWithRel() && "Unknown section kind");
- return DataRelROSection;
-}
-
-/// getSectionForConstant - Given a mergeable constant with the
-/// specified size and relocation information, return a section that it
-/// should be placed in.
-const MCSection *TargetLoweringObjectFileELF::
-getSectionForConstant(SectionKind Kind) const {
- if (Kind.isMergeableConst4() && MergeableConst4Section)
- return MergeableConst4Section;
- if (Kind.isMergeableConst8() && MergeableConst8Section)
- return MergeableConst8Section;
- if (Kind.isMergeableConst16() && MergeableConst16Section)
- return MergeableConst16Section;
- if (Kind.isReadOnly())
- return ReadOnlySection;
-
- if (Kind.isReadOnlyWithRelLocal()) return DataRelROLocalSection;
- assert(Kind.isReadOnlyWithRel() && "Unknown section kind");
- return DataRelROSection;
-}
-
-const MCExpr *TargetLoweringObjectFileELF::
-getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
- MachineModuleInfo *MMI, unsigned Encoding) const {
-
- if (Encoding & dwarf::DW_EH_PE_indirect) {
- MachineModuleInfoELF &ELFMMI = MMI->getObjFileInfo<MachineModuleInfoELF>();
-
- SmallString<128> Name;
- Mang->getNameWithPrefix(Name, GV, true);
- Name += ".DW.stub";
-
- // Add information about the stub reference to ELFMMI so that the stub
- // gets emitted by the asmprinter.
- MCSymbol *Sym = getContext().GetOrCreateSymbol(Name.str());
- MCSymbol *&StubSym = ELFMMI.getGVStubEntry(Sym);
- if (StubSym == 0) {
- Name.clear();
- Mang->getNameWithPrefix(Name, GV, false);
- StubSym = getContext().GetOrCreateSymbol(Name.str());
- }
-
- return TargetLoweringObjectFile::
- getSymbolForDwarfReference(Sym, MMI,
- Encoding & ~dwarf::DW_EH_PE_indirect);
- }
-
- return TargetLoweringObjectFile::
- getSymbolForDwarfGlobalReference(GV, Mang, MMI, Encoding);
-}
-
-//===----------------------------------------------------------------------===//
-// MachO
-//===----------------------------------------------------------------------===//
-
-typedef StringMap<const MCSectionMachO*> MachOUniqueMapTy;
-
-TargetLoweringObjectFileMachO::~TargetLoweringObjectFileMachO() {
- // If we have the MachO uniquing map, free it.
- delete (MachOUniqueMapTy*)UniquingMap;
-}
-
-
-const MCSectionMachO *TargetLoweringObjectFileMachO::
-getMachOSection(StringRef Segment, StringRef Section,
- unsigned TypeAndAttributes,
- unsigned Reserved2, SectionKind Kind) const {
- // We unique sections by their segment/section pair. The returned section
- // may not have the same flags as the requested section, if so this should be
- // diagnosed by the client as an error.
-
- // Create the map if it doesn't already exist.
- if (UniquingMap == 0)
- UniquingMap = new MachOUniqueMapTy();
- MachOUniqueMapTy &Map = *(MachOUniqueMapTy*)UniquingMap;
-
- // Form the name to look up.
- SmallString<64> Name;
- Name += Segment;
- Name.push_back(',');
- Name += Section;
-
- // Do the lookup, if we have a hit, return it.
- const MCSectionMachO *&Entry = Map[Name.str()];
- if (Entry) return Entry;
-
- // Otherwise, return a new section.
- return Entry = MCSectionMachO::Create(Segment, Section, TypeAndAttributes,
- Reserved2, Kind, getContext());
-}
-
-
-void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
- const TargetMachine &TM) {
- if (UniquingMap != 0)
- ((MachOUniqueMapTy*)UniquingMap)->clear();
- TargetLoweringObjectFile::Initialize(Ctx, TM);
-
- TextSection // .text
- = getMachOSection("__TEXT", "__text",
- MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
- SectionKind::getText());
- DataSection // .data
- = getMachOSection("__DATA", "__data", 0, SectionKind::getDataRel());
-
- CStringSection // .cstring
- = getMachOSection("__TEXT", "__cstring", MCSectionMachO::S_CSTRING_LITERALS,
- SectionKind::getMergeable1ByteCString());
- UStringSection
- = getMachOSection("__TEXT","__ustring", 0,
- SectionKind::getMergeable2ByteCString());
- FourByteConstantSection // .literal4
- = getMachOSection("__TEXT", "__literal4", MCSectionMachO::S_4BYTE_LITERALS,
- SectionKind::getMergeableConst4());
- EightByteConstantSection // .literal8
- = getMachOSection("__TEXT", "__literal8", MCSectionMachO::S_8BYTE_LITERALS,
- SectionKind::getMergeableConst8());
-
- // ld_classic doesn't support .literal16 in 32-bit mode, and ld64 falls back
- // to using it in -static mode.
- SixteenByteConstantSection = 0;
- if (TM.getRelocationModel() != Reloc::Static &&
- TM.getTargetData()->getPointerSize() == 32)
- SixteenByteConstantSection = // .literal16
- getMachOSection("__TEXT", "__literal16",MCSectionMachO::S_16BYTE_LITERALS,
- SectionKind::getMergeableConst16());
-
- ReadOnlySection // .const
- = getMachOSection("__TEXT", "__const", 0, SectionKind::getReadOnly());
-
- TextCoalSection
- = getMachOSection("__TEXT", "__textcoal_nt",
- MCSectionMachO::S_COALESCED |
- MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
- SectionKind::getText());
- ConstTextCoalSection
- = getMachOSection("__TEXT", "__const_coal", MCSectionMachO::S_COALESCED,
- SectionKind::getText());
- ConstDataCoalSection
- = getMachOSection("__DATA","__const_coal", MCSectionMachO::S_COALESCED,
- SectionKind::getText());
- ConstDataSection // .const_data
- = getMachOSection("__DATA", "__const", 0,
- SectionKind::getReadOnlyWithRel());
- DataCoalSection
- = getMachOSection("__DATA","__datacoal_nt", MCSectionMachO::S_COALESCED,
- SectionKind::getDataRel());
- DataCommonSection
- = getMachOSection("__DATA","__common", MCSectionMachO::S_ZEROFILL,
- SectionKind::getBSS());
- DataBSSSection
- = getMachOSection("__DATA","__bss", MCSectionMachO::S_ZEROFILL,
- SectionKind::getBSS());
-
-
- LazySymbolPointerSection
- = getMachOSection("__DATA", "__la_symbol_ptr",
- MCSectionMachO::S_LAZY_SYMBOL_POINTERS,
- SectionKind::getMetadata());
- NonLazySymbolPointerSection
- = getMachOSection("__DATA", "__nl_symbol_ptr",
- MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
- SectionKind::getMetadata());
-
- if (TM.getRelocationModel() == Reloc::Static) {
- StaticCtorSection
- = getMachOSection("__TEXT", "__constructor", 0,SectionKind::getDataRel());
- StaticDtorSection
- = getMachOSection("__TEXT", "__destructor", 0, SectionKind::getDataRel());
- } else {
- StaticCtorSection
- = getMachOSection("__DATA", "__mod_init_func",
- MCSectionMachO::S_MOD_INIT_FUNC_POINTERS,
- SectionKind::getDataRel());
- StaticDtorSection
- = getMachOSection("__DATA", "__mod_term_func",
- MCSectionMachO::S_MOD_TERM_FUNC_POINTERS,
- SectionKind::getDataRel());
- }
-
- // Exception Handling.
- LSDASection = getMachOSection("__DATA", "__gcc_except_tab", 0,
- SectionKind::getDataRel());
- EHFrameSection =
- getMachOSection("__TEXT", "__eh_frame",
- MCSectionMachO::S_COALESCED |
- MCSectionMachO::S_ATTR_NO_TOC |
- MCSectionMachO::S_ATTR_STRIP_STATIC_SYMS |
- MCSectionMachO::S_ATTR_LIVE_SUPPORT,
- SectionKind::getReadOnly());
-
- // Debug Information.
- DwarfAbbrevSection =
- getMachOSection("__DWARF", "__debug_abbrev", MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfInfoSection =
- getMachOSection("__DWARF", "__debug_info", MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfLineSection =
- getMachOSection("__DWARF", "__debug_line", MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfFrameSection =
- getMachOSection("__DWARF", "__debug_frame", MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfPubNamesSection =
- getMachOSection("__DWARF", "__debug_pubnames", MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfPubTypesSection =
- getMachOSection("__DWARF", "__debug_pubtypes", MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfStrSection =
- getMachOSection("__DWARF", "__debug_str", MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfLocSection =
- getMachOSection("__DWARF", "__debug_loc", MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfARangesSection =
- getMachOSection("__DWARF", "__debug_aranges", MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfRangesSection =
- getMachOSection("__DWARF", "__debug_ranges", MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfMacroInfoSection =
- getMachOSection("__DWARF", "__debug_macinfo", MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfDebugInlineSection =
- getMachOSection("__DWARF", "__debug_inlined", MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
-}
-
-const MCSection *TargetLoweringObjectFileMachO::
-getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const {
- // Parse the section specifier and create it if valid.
- StringRef Segment, Section;
- unsigned TAA, StubSize;
- std::string ErrorCode =
- MCSectionMachO::ParseSectionSpecifier(GV->getSection(), Segment, Section,
- TAA, StubSize);
- if (!ErrorCode.empty()) {
- // If invalid, report the error with llvm_report_error.
- llvm_report_error("Global variable '" + GV->getNameStr() +
- "' has an invalid section specifier '" + GV->getSection()+
- "': " + ErrorCode + ".");
- // Fall back to dropping it into the data section.
- return DataSection;
- }
-
- // Get the section.
- const MCSectionMachO *S =
- getMachOSection(Segment, Section, TAA, StubSize, Kind);
-
- // Okay, now that we got the section, verify that the TAA & StubSize agree.
- // If the user declared multiple globals with different section flags, we need
- // to reject it here.
- if (S->getTypeAndAttributes() != TAA || S->getStubSize() != StubSize) {
- // If invalid, report the error with llvm_report_error.
- llvm_report_error("Global variable '" + GV->getNameStr() +
- "' section type or attributes does not match previous"
- " section specifier");
- }
-
- return S;
-}
-
-const MCSection *TargetLoweringObjectFileMachO::
-SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const {
- assert(!Kind.isThreadLocal() && "Darwin doesn't support TLS");
-
- if (Kind.isText())
- return GV->isWeakForLinker() ? TextCoalSection : TextSection;
-
- // If this is weak/linkonce, put this in a coalescable section, either in text
- // or data depending on if it is writable.
- if (GV->isWeakForLinker()) {
- if (Kind.isReadOnly())
- return ConstTextCoalSection;
- return DataCoalSection;
- }
-
- // FIXME: Alignment check should be handled by section classifier.
- if (Kind.isMergeable1ByteCString() ||
- Kind.isMergeable2ByteCString()) {
- if (TM.getTargetData()->getPreferredAlignment(
- cast<GlobalVariable>(GV)) < 32) {
- if (Kind.isMergeable1ByteCString())
- return CStringSection;
- assert(Kind.isMergeable2ByteCString());
- return UStringSection;
- }
- }
-
- if (Kind.isMergeableConst()) {
- if (Kind.isMergeableConst4())
- return FourByteConstantSection;
- if (Kind.isMergeableConst8())
- return EightByteConstantSection;
- if (Kind.isMergeableConst16() && SixteenByteConstantSection)
- return SixteenByteConstantSection;
- }
-
- // Otherwise, if it is readonly, but not something we can specially optimize,
- // just drop it in .const.
- if (Kind.isReadOnly())
- return ReadOnlySection;
-
- // If this is marked const, put it into a const section. But if the dynamic
- // linker needs to write to it, put it in the data segment.
- if (Kind.isReadOnlyWithRel())
- return ConstDataSection;
-
- // Put zero initialized globals with strong external linkage in the
- // DATA, __common section with the .zerofill directive.
- if (Kind.isBSSExtern())
- return DataCommonSection;
-
- // Put zero initialized globals with local linkage in __DATA,__bss directive
- // with the .zerofill directive (aka .lcomm).
- if (Kind.isBSSLocal())
- return DataBSSSection;
-
- // Otherwise, just drop the variable in the normal data section.
- return DataSection;
-}
-
-const MCSection *
-TargetLoweringObjectFileMachO::getSectionForConstant(SectionKind Kind) const {
- // If this constant requires a relocation, we have to put it in the data
- // segment, not in the text segment.
- if (Kind.isDataRel() || Kind.isReadOnlyWithRel())
- return ConstDataSection;
-
- if (Kind.isMergeableConst4())
- return FourByteConstantSection;
- if (Kind.isMergeableConst8())
- return EightByteConstantSection;
- if (Kind.isMergeableConst16() && SixteenByteConstantSection)
- return SixteenByteConstantSection;
- return ReadOnlySection; // .const
-}
-
-/// shouldEmitUsedDirectiveFor - This hook allows targets to selectively decide
-/// not to emit the UsedDirective for some symbols in llvm.used.
-// FIXME: REMOVE this (rdar://7071300)
-bool TargetLoweringObjectFileMachO::
-shouldEmitUsedDirectiveFor(const GlobalValue *GV, Mangler *Mang) const {
- /// On Darwin, internally linked data beginning with "L" or "l" does not have
- /// the directive emitted (this occurs in ObjC metadata).
- if (!GV) return false;
-
- // Check whether the mangled name has the "Private" or "LinkerPrivate" prefix.
- if (GV->hasLocalLinkage() && !isa<Function>(GV)) {
- // FIXME: ObjC metadata is currently emitted as internal symbols that have
- // \1L and \0l prefixes on them. Fix them to be Private/LinkerPrivate and
- // this horrible hack can go away.
- SmallString<64> Name;
- Mang->getNameWithPrefix(Name, GV, false);
- if (Name[0] == 'L' || Name[0] == 'l')
- return false;
- }
-
- return true;
-}
-
-const MCExpr *TargetLoweringObjectFileMachO::
-getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
- MachineModuleInfo *MMI, unsigned Encoding) const {
- // The mach-o version of this method defaults to returning a stub reference.
-
- if (Encoding & dwarf::DW_EH_PE_indirect) {
- SmallString<128> Name;
- Mang->getNameWithPrefix(Name, GV, true);
- Name += "$non_lazy_ptr";
- MCSymbol *Sym = getContext().GetOrCreateSymbol(Name.str());
-
- return TargetLoweringObjectFile::
- getSymbolForDwarfReference(Sym, MMI,
- Encoding & ~dwarf::DW_EH_PE_indirect);
- }
-
- return TargetLoweringObjectFile::
- getSymbolForDwarfGlobalReference(GV, Mang, MMI, Encoding);
-}
-
-
-//===----------------------------------------------------------------------===//
-// COFF
-//===----------------------------------------------------------------------===//
-
-typedef StringMap<const MCSectionCOFF*> COFFUniqueMapTy;
-
-TargetLoweringObjectFileCOFF::~TargetLoweringObjectFileCOFF() {
- delete (COFFUniqueMapTy*)UniquingMap;
-}
-
-
-const MCSection *TargetLoweringObjectFileCOFF::
-getCOFFSection(StringRef Name, bool isDirective, SectionKind Kind) const {
- // Create the map if it doesn't already exist.
- if (UniquingMap == 0)
- UniquingMap = new MachOUniqueMapTy();
- COFFUniqueMapTy &Map = *(COFFUniqueMapTy*)UniquingMap;
-
- // Do the lookup, if we have a hit, return it.
- const MCSectionCOFF *&Entry = Map[Name];
- if (Entry) return Entry;
-
- return Entry = MCSectionCOFF::Create(Name, isDirective, Kind, getContext());
-}
-
-void TargetLoweringObjectFileCOFF::Initialize(MCContext &Ctx,
- const TargetMachine &TM) {
- if (UniquingMap != 0)
- ((COFFUniqueMapTy*)UniquingMap)->clear();
- TargetLoweringObjectFile::Initialize(Ctx, TM);
- TextSection = getCOFFSection("\t.text", true, SectionKind::getText());
- DataSection = getCOFFSection("\t.data", true, SectionKind::getDataRel());
- StaticCtorSection =
- getCOFFSection(".ctors", false, SectionKind::getDataRel());
- StaticDtorSection =
- getCOFFSection(".dtors", false, SectionKind::getDataRel());
-
- // FIXME: We're emitting LSDA info into a readonly section on COFF, even
- // though it contains relocatable pointers. In PIC mode, this is probably a
- // big runtime hit for C++ apps. Either the contents of the LSDA need to be
- // adjusted or this should be a data section.
- LSDASection =
- getCOFFSection(".gcc_except_table", false, SectionKind::getReadOnly());
- EHFrameSection =
- getCOFFSection(".eh_frame", false, SectionKind::getDataRel());
-
- // Debug info.
- // FIXME: Don't use 'directive' mode here.
- DwarfAbbrevSection =
- getCOFFSection("\t.section\t.debug_abbrev,\"dr\"",
- true, SectionKind::getMetadata());
- DwarfInfoSection =
- getCOFFSection("\t.section\t.debug_info,\"dr\"",
- true, SectionKind::getMetadata());
- DwarfLineSection =
- getCOFFSection("\t.section\t.debug_line,\"dr\"",
- true, SectionKind::getMetadata());
- DwarfFrameSection =
- getCOFFSection("\t.section\t.debug_frame,\"dr\"",
- true, SectionKind::getMetadata());
- DwarfPubNamesSection =
- getCOFFSection("\t.section\t.debug_pubnames,\"dr\"",
- true, SectionKind::getMetadata());
- DwarfPubTypesSection =
- getCOFFSection("\t.section\t.debug_pubtypes,\"dr\"",
- true, SectionKind::getMetadata());
- DwarfStrSection =
- getCOFFSection("\t.section\t.debug_str,\"dr\"",
- true, SectionKind::getMetadata());
- DwarfLocSection =
- getCOFFSection("\t.section\t.debug_loc,\"dr\"",
- true, SectionKind::getMetadata());
- DwarfARangesSection =
- getCOFFSection("\t.section\t.debug_aranges,\"dr\"",
- true, SectionKind::getMetadata());
- DwarfRangesSection =
- getCOFFSection("\t.section\t.debug_ranges,\"dr\"",
- true, SectionKind::getMetadata());
- DwarfMacroInfoSection =
- getCOFFSection("\t.section\t.debug_macinfo,\"dr\"",
- true, SectionKind::getMetadata());
-}
-
-const MCSection *TargetLoweringObjectFileCOFF::
-getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const {
- return getCOFFSection(GV->getSection(), false, Kind);
-}
-
-static const char *getCOFFSectionPrefixForUniqueGlobal(SectionKind Kind) {
- if (Kind.isText())
- return ".text$linkonce";
- if (Kind.isWriteable())
- return ".data$linkonce";
- return ".rdata$linkonce";
-}
-
-
-const MCSection *TargetLoweringObjectFileCOFF::
-SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const {
- assert(!Kind.isThreadLocal() && "Doesn't support TLS");
-
- // If this global is linkonce/weak and the target handles this by emitting it
- // into a 'uniqued' section name, create and return the section now.
- if (GV->isWeakForLinker()) {
- const char *Prefix = getCOFFSectionPrefixForUniqueGlobal(Kind);
- SmallString<128> Name(Prefix, Prefix+strlen(Prefix));
- Mang->getNameWithPrefix(Name, GV, false);
- return getCOFFSection(Name.str(), false, Kind);
- }
-
- if (Kind.isText())
- return getTextSection();
-
- return getDataSection();
-}
-
#include "llvm/MC/MCSymbol.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/Target/Mangler.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegistry.h"
#include "llvm/ADT/SmallString.h"
#ifndef LLVM_TARGET_X86_TARGETOBJECTFILE_H
#define LLVM_TARGET_X86_TARGETOBJECTFILE_H
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#ifndef LLVM_TARGET_XCORE_TARGETOBJECTFILE_H
#define LLVM_TARGET_XCORE_TARGETOBJECTFILE_H
-#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
namespace llvm {
class XCoreTargetObjectFile : public TargetLoweringObjectFileELF {
public:
-
void Initialize(MCContext &Ctx, const TargetMachine &TM);
// TODO: Classify globals as xcore wishes.
projects / oota-llvm.git / commitdiff