#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCSectionCOFF.h"
+#include "llvm/MC/MCStreamer.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/ELF.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Triple.h"
using namespace llvm;
using namespace dwarf;
// ELF
//===----------------------------------------------------------------------===//
-void TargetLoweringObjectFileELF::Initialize(MCContext &Ctx,
- const TargetMachine &TM) {
- TargetLoweringObjectFile::Initialize(Ctx, TM);
-
- BSSSection =
- getContext().getELFSection(".bss", MCSectionELF::SHT_NOBITS,
- MCSectionELF::SHF_WRITE |MCSectionELF::SHF_ALLOC,
- SectionKind::getBSS());
-
- TextSection =
- getContext().getELFSection(".text", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_EXECINSTR |
- MCSectionELF::SHF_ALLOC,
- SectionKind::getText());
-
- DataSection =
- getContext().getELFSection(".data", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_WRITE |MCSectionELF::SHF_ALLOC,
- SectionKind::getDataRel());
-
- ReadOnlySection =
- getContext().getELFSection(".rodata", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC,
- SectionKind::getReadOnly());
-
- TLSDataSection =
- getContext().getELFSection(".tdata", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_TLS |
- MCSectionELF::SHF_WRITE,
- SectionKind::getThreadData());
-
- TLSBSSSection =
- getContext().getELFSection(".tbss", MCSectionELF::SHT_NOBITS,
- MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_TLS |
- MCSectionELF::SHF_WRITE,
- SectionKind::getThreadBSS());
-
- DataRelSection =
- getContext().getELFSection(".data.rel", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC |MCSectionELF::SHF_WRITE,
- SectionKind::getDataRel());
-
- DataRelLocalSection =
- getContext().getELFSection(".data.rel.local", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC |MCSectionELF::SHF_WRITE,
- SectionKind::getDataRelLocal());
-
- DataRelROSection =
- getContext().getELFSection(".data.rel.ro", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC |MCSectionELF::SHF_WRITE,
- SectionKind::getReadOnlyWithRel());
-
- DataRelROLocalSection =
- getContext().getELFSection(".data.rel.ro.local", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC |MCSectionELF::SHF_WRITE,
- SectionKind::getReadOnlyWithRelLocal());
-
- MergeableConst4Section =
- getContext().getELFSection(".rodata.cst4", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC |MCSectionELF::SHF_MERGE,
- SectionKind::getMergeableConst4());
-
- MergeableConst8Section =
- getContext().getELFSection(".rodata.cst8", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC |MCSectionELF::SHF_MERGE,
- SectionKind::getMergeableConst8());
-
- MergeableConst16Section =
- getContext().getELFSection(".rodata.cst16", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC |MCSectionELF::SHF_MERGE,
- SectionKind::getMergeableConst16());
-
- StaticCtorSection =
- getContext().getELFSection(".ctors", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC |MCSectionELF::SHF_WRITE,
- SectionKind::getDataRel());
-
- StaticDtorSection =
- getContext().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 =
- getContext().getELFSection(".gcc_except_table", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC,
- SectionKind::getReadOnly());
- EHFrameSection =
- getContext().getELFSection(".eh_frame", MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC |MCSectionELF::SHF_WRITE,
- SectionKind::getDataRel());
-
- // Debug Info Sections.
- DwarfAbbrevSection =
- getContext().getELFSection(".debug_abbrev", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfInfoSection =
- getContext().getELFSection(".debug_info", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfLineSection =
- getContext().getELFSection(".debug_line", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfFrameSection =
- getContext().getELFSection(".debug_frame", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfPubNamesSection =
- getContext().getELFSection(".debug_pubnames", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfPubTypesSection =
- getContext().getELFSection(".debug_pubtypes", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfStrSection =
- getContext().getELFSection(".debug_str", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfLocSection =
- getContext().getELFSection(".debug_loc", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfARangesSection =
- getContext().getELFSection(".debug_aranges", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfRangesSection =
- getContext().getELFSection(".debug_ranges", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
- DwarfMacroInfoSection =
- getContext().getELFSection(".debug_macinfo", MCSectionELF::SHT_PROGBITS, 0,
- SectionKind::getMetadata());
+MCSymbol *
+TargetLoweringObjectFileELF::getCFIPersonalitySymbol(const GlobalValue *GV,
+ Mangler *Mang,
+ MachineModuleInfo *MMI) const {
+ unsigned Encoding = getPersonalityEncoding();
+ switch (Encoding & 0x70) {
+ default:
+ report_fatal_error("We do not support this DWARF encoding yet!");
+ case dwarf::DW_EH_PE_absptr:
+ return Mang->getSymbol(GV);
+ break;
+ case dwarf::DW_EH_PE_pcrel: {
+ return getContext().GetOrCreateSymbol(StringRef("DW.ref.") +
+ Mang->getSymbol(GV)->getName());
+ break;
+ }
+ }
}
+void TargetLoweringObjectFileELF::emitPersonalityValue(MCStreamer &Streamer,
+ const TargetMachine &TM,
+ const MCSymbol *Sym) const {
+ SmallString<64> NameData("DW.ref.");
+ NameData += Sym->getName();
+ MCSymbol *Label = getContext().GetOrCreateSymbol(NameData);
+ Streamer.EmitSymbolAttribute(Label, MCSA_Hidden);
+ Streamer.EmitSymbolAttribute(Label, MCSA_Weak);
+ StringRef Prefix = ".data.";
+ NameData.insert(NameData.begin(), Prefix.begin(), Prefix.end());
+ unsigned Flags = ELF::SHF_ALLOC | ELF::SHF_WRITE | ELF::SHF_GROUP;
+ const MCSection *Sec = getContext().getELFSection(NameData,
+ ELF::SHT_PROGBITS,
+ Flags,
+ SectionKind::getDataRel(),
+ 0, Label->getName());
+ Streamer.SwitchSection(Sec);
+ Streamer.EmitValueToAlignment(8);
+ Streamer.EmitSymbolAttribute(Label, MCSA_ELF_TypeObject);
+ const MCExpr *E = MCConstantExpr::Create(8, getContext());
+ Streamer.EmitELFSize(Label, E);
+ Streamer.EmitLabel(Label);
+
+ unsigned Size = TM.getTargetData()->getPointerSize();
+ Streamer.EmitSymbolValue(Sym, Size);
+}
static SectionKind
getELFKindForNamedSection(StringRef Name, SectionKind K) {
+ // N.B.: The defaults used in here are no the same ones used in MC.
+ // We follow gcc, MC follows gas. For example, given ".section .eh_frame",
+ // both gas and MC will produce a section with no flags. Given
+ // section(".eh_frame") gcc will produce
+ // .section .eh_frame,"a",@progbits
if (Name.empty() || Name[0] != '.') return K;
// Some lame default implementation based on some magic section names.
static unsigned getELFSectionType(StringRef Name, SectionKind K) {
if (Name == ".init_array")
- return MCSectionELF::SHT_INIT_ARRAY;
+ return ELF::SHT_INIT_ARRAY;
if (Name == ".fini_array")
- return MCSectionELF::SHT_FINI_ARRAY;
+ return ELF::SHT_FINI_ARRAY;
if (Name == ".preinit_array")
- return MCSectionELF::SHT_PREINIT_ARRAY;
+ return ELF::SHT_PREINIT_ARRAY;
if (K.isBSS() || K.isThreadBSS())
- return MCSectionELF::SHT_NOBITS;
+ return ELF::SHT_NOBITS;
- return MCSectionELF::SHT_PROGBITS;
+ return ELF::SHT_PROGBITS;
}
unsigned Flags = 0;
if (!K.isMetadata())
- Flags |= MCSectionELF::SHF_ALLOC;
+ Flags |= ELF::SHF_ALLOC;
if (K.isText())
- Flags |= MCSectionELF::SHF_EXECINSTR;
+ Flags |= ELF::SHF_EXECINSTR;
if (K.isWriteable())
- Flags |= MCSectionELF::SHF_WRITE;
+ Flags |= ELF::SHF_WRITE;
if (K.isThreadLocal())
- Flags |= MCSectionELF::SHF_TLS;
+ Flags |= ELF::SHF_TLS;
// K.isMergeableConst() is left out to honour PR4650
if (K.isMergeableCString() || K.isMergeableConst4() ||
K.isMergeableConst8() || K.isMergeableConst16())
- Flags |= MCSectionELF::SHF_MERGE;
+ Flags |= ELF::SHF_MERGE;
if (K.isMergeableCString())
- Flags |= MCSectionELF::SHF_STRINGS;
+ Flags |= ELF::SHF_STRINGS;
return Flags;
}
return getContext().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.";
+ getELFSectionFlags(Kind), Kind);
}
/// getSectionPrefixForGlobal - Return the section prefix name used by options
bool EmitUniquedSection;
if (Kind.isText())
EmitUniquedSection = TM.getFunctionSections();
- else
+ else
EmitUniquedSection = TM.getDataSections();
// If this global is linkonce/weak and the target handles this by emitting it
if ((GV->isWeakForLinker() || EmitUniquedSection) &&
!Kind.isCommon() && !Kind.isBSS()) {
const char *Prefix;
- if (GV->isWeakForLinker())
- Prefix = getSectionPrefixForUniqueGlobal(Kind);
- else {
- assert(EmitUniquedSection);
- Prefix = getSectionPrefixForGlobal(Kind);
- }
+ Prefix = getSectionPrefixForGlobal(Kind);
SmallString<128> Name(Prefix, Prefix+strlen(Prefix));
MCSymbol *Sym = Mang->getSymbol(GV);
Name.append(Sym->getName().begin(), Sym->getName().end());
+ StringRef Group = "";
+ unsigned Flags = getELFSectionFlags(Kind);
+ if (GV->isWeakForLinker()) {
+ Group = Sym->getName();
+ Flags |= ELF::SHF_GROUP;
+ }
+
return getContext().getELFSection(Name.str(),
getELFSectionType(Name.str(), Kind),
- getELFSectionFlags(Kind), Kind);
+ Flags, Kind, 0, Group);
}
if (Kind.isText()) return TextSection;
std::string Name = SizeSpec + utostr(Align);
- return getContext().getELFSection(Name, MCSectionELF::SHT_PROGBITS,
- MCSectionELF::SHF_ALLOC |
- MCSectionELF::SHF_MERGE |
- MCSectionELF::SHF_STRINGS,
+ return getContext().getELFSection(Name, ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |
+ ELF::SHF_MERGE |
+ ELF::SHF_STRINGS,
Kind);
}
}
return TargetLoweringObjectFile::
- getExprForDwarfReference(SSym, Mang, MMI,
- Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
+ getExprForDwarfReference(SSym, Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
}
return TargetLoweringObjectFile::
// MachO
//===----------------------------------------------------------------------===//
-void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
- const TargetMachine &TM) {
- // _foo.eh symbols are currently always exported so that the linker knows
- // about them. This is not necessary on 10.6 and later, but it
- // doesn't hurt anything.
- // FIXME: I need to get this from Triple.
- IsFunctionEHSymbolGlobal = true;
- IsFunctionEHFrameSymbolPrivate = false;
- SupportsWeakOmittedEHFrame = false;
-
- TargetLoweringObjectFile::Initialize(Ctx, TM);
-
- TextSection // .text
- = getContext().getMachOSection("__TEXT", "__text",
- MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
- SectionKind::getText());
- DataSection // .data
- = getContext().getMachOSection("__DATA", "__data", 0,
- SectionKind::getDataRel());
-
- TLSDataSection // .tdata
- = getContext().getMachOSection("__DATA", "__thread_data",
- MCSectionMachO::S_THREAD_LOCAL_REGULAR,
- SectionKind::getDataRel());
- TLSBSSSection // .tbss
- = getContext().getMachOSection("__DATA", "__thread_bss",
- MCSectionMachO::S_THREAD_LOCAL_ZEROFILL,
- SectionKind::getThreadBSS());
-
- // TODO: Verify datarel below.
- TLSTLVSection // .tlv
- = getContext().getMachOSection("__DATA", "__thread_vars",
- MCSectionMachO::S_THREAD_LOCAL_VARIABLES,
- SectionKind::getDataRel());
-
- TLSThreadInitSection
- = getContext().getMachOSection("__DATA", "__thread_init",
- MCSectionMachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
- SectionKind::getDataRel());
-
- CStringSection // .cstring
- = getContext().getMachOSection("__TEXT", "__cstring",
- MCSectionMachO::S_CSTRING_LITERALS,
- SectionKind::getMergeable1ByteCString());
- UStringSection
- = getContext().getMachOSection("__TEXT","__ustring", 0,
- SectionKind::getMergeable2ByteCString());
- FourByteConstantSection // .literal4
- = getContext().getMachOSection("__TEXT", "__literal4",
- MCSectionMachO::S_4BYTE_LITERALS,
- SectionKind::getMergeableConst4());
- EightByteConstantSection // .literal8
- = getContext().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
- getContext().getMachOSection("__TEXT", "__literal16",
- MCSectionMachO::S_16BYTE_LITERALS,
- SectionKind::getMergeableConst16());
-
- ReadOnlySection // .const
- = getContext().getMachOSection("__TEXT", "__const", 0,
- SectionKind::getReadOnly());
-
- TextCoalSection
- = getContext().getMachOSection("__TEXT", "__textcoal_nt",
- MCSectionMachO::S_COALESCED |
- MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
- SectionKind::getText());
- ConstTextCoalSection
- = getContext().getMachOSection("__TEXT", "__const_coal",
- MCSectionMachO::S_COALESCED,
- SectionKind::getText());
- ConstDataCoalSection
- = getContext().getMachOSection("__DATA","__const_coal",
- MCSectionMachO::S_COALESCED,
- SectionKind::getText());
- ConstDataSection // .const_data
- = getContext().getMachOSection("__DATA", "__const", 0,
- SectionKind::getReadOnlyWithRel());
- DataCoalSection
- = getContext().getMachOSection("__DATA","__datacoal_nt",
- MCSectionMachO::S_COALESCED,
- SectionKind::getDataRel());
- DataCommonSection
- = getContext().getMachOSection("__DATA","__common",
- MCSectionMachO::S_ZEROFILL,
- SectionKind::getBSS());
- DataBSSSection
- = getContext().getMachOSection("__DATA","__bss", MCSectionMachO::S_ZEROFILL,
- SectionKind::getBSS());
-
-
- LazySymbolPointerSection
- = getContext().getMachOSection("__DATA", "__la_symbol_ptr",
- MCSectionMachO::S_LAZY_SYMBOL_POINTERS,
- SectionKind::getMetadata());
- NonLazySymbolPointerSection
- = getContext().getMachOSection("__DATA", "__nl_symbol_ptr",
- MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
- SectionKind::getMetadata());
-
- if (TM.getRelocationModel() == Reloc::Static) {
- StaticCtorSection
- = getContext().getMachOSection("__TEXT", "__constructor", 0,
- SectionKind::getDataRel());
- StaticDtorSection
- = getContext().getMachOSection("__TEXT", "__destructor", 0,
- SectionKind::getDataRel());
- } else {
- StaticCtorSection
- = getContext().getMachOSection("__DATA", "__mod_init_func",
- MCSectionMachO::S_MOD_INIT_FUNC_POINTERS,
- SectionKind::getDataRel());
- StaticDtorSection
- = getContext().getMachOSection("__DATA", "__mod_term_func",
- MCSectionMachO::S_MOD_TERM_FUNC_POINTERS,
- SectionKind::getDataRel());
- }
-
- // Exception Handling.
- LSDASection = getContext().getMachOSection("__TEXT", "__gcc_except_tab", 0,
- SectionKind::getReadOnlyWithRel());
- EHFrameSection =
- getContext().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 =
- getContext().getMachOSection("__DWARF", "__debug_abbrev",
- MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfInfoSection =
- getContext().getMachOSection("__DWARF", "__debug_info",
- MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfLineSection =
- getContext().getMachOSection("__DWARF", "__debug_line",
- MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfFrameSection =
- getContext().getMachOSection("__DWARF", "__debug_frame",
- MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfPubNamesSection =
- getContext().getMachOSection("__DWARF", "__debug_pubnames",
- MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfPubTypesSection =
- getContext().getMachOSection("__DWARF", "__debug_pubtypes",
- MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfStrSection =
- getContext().getMachOSection("__DWARF", "__debug_str",
- MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfLocSection =
- getContext().getMachOSection("__DWARF", "__debug_loc",
- MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfARangesSection =
- getContext().getMachOSection("__DWARF", "__debug_aranges",
- MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfRangesSection =
- getContext().getMachOSection("__DWARF", "__debug_ranges",
- MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfMacroInfoSection =
- getContext().getMachOSection("__DWARF", "__debug_macinfo",
- MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfDebugInlineSection =
- getContext().getMachOSection("__DWARF", "__debug_inlined",
- MCSectionMachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
-
- TLSExtraDataSection = TLSTLVSection;
-}
-
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;
+ unsigned TAA = 0, StubSize = 0;
+ bool TAAParsed;
std::string ErrorCode =
MCSectionMachO::ParseSectionSpecifier(GV->getSection(), Segment, Section,
- TAA, StubSize);
+ TAA, TAAParsed, StubSize);
if (!ErrorCode.empty()) {
// If invalid, report the error with report_fatal_error.
report_fatal_error("Global variable '" + GV->getNameStr() +
const MCSectionMachO *S =
getContext().getMachOSection(Segment, Section, TAA, StubSize, Kind);
+ // If TAA wasn't set by ParseSectionSpecifier() above,
+ // use the value returned by getMachOSection() as a default.
+ if (!TAAParsed)
+ TAA = S->getTypeAndAttributes();
+
// 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.
const MCSection *TargetLoweringObjectFileMachO::
SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler *Mang, const TargetMachine &TM) const {
-
+
// Handle thread local data.
if (Kind.isThreadBSS()) return TLSBSSSection;
if (Kind.isThreadData()) return TLSDataSection;
if (Kind.isMergeable1ByteCString() &&
TM.getTargetData()->getPreferredAlignment(cast<GlobalVariable>(GV)) < 32)
return CStringSection;
-
+
// Do not put 16-bit arrays in the UString section if they have an
// externally visible label, this runs into issues with certain linker
// versions.
// with the .zerofill directive (aka .lcomm).
if (Kind.isBSSLocal())
return DataBSSSection;
-
+
// Otherwise, just drop the variable in the normal data section.
return DataSection;
}
}
return TargetLoweringObjectFile::
- getExprForDwarfReference(SSym, Mang, MMI,
- Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
+ getExprForDwarfReference(SSym, Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
}
return TargetLoweringObjectFile::
getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, Streamer);
}
+MCSymbol *TargetLoweringObjectFileMachO::
+getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
+ MachineModuleInfo *MMI) const {
+ // The mach-o version of this method defaults to returning a stub reference.
+ MachineModuleInfoMachO &MachOMMI =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>();
+
+ SmallString<128> Name;
+ Mang->getNameWithPrefix(Name, GV, true);
+ Name += "$non_lazy_ptr";
+
+ // Add information about the stub reference to MachOMMI so that the stub
+ // gets emitted by the asmprinter.
+ MCSymbol *SSym = getContext().GetOrCreateSymbol(Name.str());
+ MachineModuleInfoImpl::StubValueTy &StubSym = MachOMMI.getGVStubEntry(SSym);
+ if (StubSym.getPointer() == 0) {
+ MCSymbol *Sym = Mang->getSymbol(GV);
+ StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
+ }
+
+ return SSym;
+}
+
unsigned TargetLoweringObjectFileMachO::getPersonalityEncoding() const {
return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}
return DW_EH_PE_pcrel;
}
-unsigned TargetLoweringObjectFileMachO::getFDEEncoding() const {
+unsigned TargetLoweringObjectFileMachO::getFDEEncoding(bool CFI) const {
return DW_EH_PE_pcrel;
}
// COFF
//===----------------------------------------------------------------------===//
-void TargetLoweringObjectFileCOFF::Initialize(MCContext &Ctx,
- const TargetMachine &TM) {
- TargetLoweringObjectFile::Initialize(Ctx, TM);
- TextSection =
- getContext().getCOFFSection(".text",
- COFF::IMAGE_SCN_CNT_CODE |
- COFF::IMAGE_SCN_MEM_EXECUTE |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getText());
- DataSection =
- getContext().getCOFFSection(".data",
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ |
- COFF::IMAGE_SCN_MEM_WRITE,
- SectionKind::getDataRel());
- ReadOnlySection =
- getContext().getCOFFSection(".rdata",
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getReadOnly());
- StaticCtorSection =
- getContext().getCOFFSection(".ctors",
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ |
- COFF::IMAGE_SCN_MEM_WRITE,
- SectionKind::getDataRel());
- StaticDtorSection =
- getContext().getCOFFSection(".dtors",
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ |
- COFF::IMAGE_SCN_MEM_WRITE,
- 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 =
- getContext().getCOFFSection(".gcc_except_table",
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getReadOnly());
- EHFrameSection =
- getContext().getCOFFSection(".eh_frame",
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ |
- COFF::IMAGE_SCN_MEM_WRITE,
- SectionKind::getDataRel());
-
- // Debug info.
- DwarfAbbrevSection =
- getContext().getCOFFSection(".debug_abbrev",
- COFF::IMAGE_SCN_MEM_DISCARDABLE |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfInfoSection =
- getContext().getCOFFSection(".debug_info",
- COFF::IMAGE_SCN_MEM_DISCARDABLE |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfLineSection =
- getContext().getCOFFSection(".debug_line",
- COFF::IMAGE_SCN_MEM_DISCARDABLE |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfFrameSection =
- getContext().getCOFFSection(".debug_frame",
- COFF::IMAGE_SCN_MEM_DISCARDABLE |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfPubNamesSection =
- getContext().getCOFFSection(".debug_pubnames",
- COFF::IMAGE_SCN_MEM_DISCARDABLE |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfPubTypesSection =
- getContext().getCOFFSection(".debug_pubtypes",
- COFF::IMAGE_SCN_MEM_DISCARDABLE |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfStrSection =
- getContext().getCOFFSection(".debug_str",
- COFF::IMAGE_SCN_MEM_DISCARDABLE |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfLocSection =
- getContext().getCOFFSection(".debug_loc",
- COFF::IMAGE_SCN_MEM_DISCARDABLE |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfARangesSection =
- getContext().getCOFFSection(".debug_aranges",
- COFF::IMAGE_SCN_MEM_DISCARDABLE |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfRangesSection =
- getContext().getCOFFSection(".debug_ranges",
- COFF::IMAGE_SCN_MEM_DISCARDABLE |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfMacroInfoSection =
- getContext().getCOFFSection(".debug_macinfo",
- COFF::IMAGE_SCN_MEM_DISCARDABLE |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
-
- DrectveSection =
- getContext().getCOFFSection(".drectve",
- COFF::IMAGE_SCN_LNK_INFO,
- SectionKind::getMetadata());
-}
-
static unsigned
getCOFFSectionFlags(SectionKind K) {
unsigned Flags = 0;
else if (K.isText())
Flags |=
COFF::IMAGE_SCN_MEM_EXECUTE |
+ COFF::IMAGE_SCN_MEM_READ |
COFF::IMAGE_SCN_CNT_CODE;
else if (K.isBSS ())
Flags |=
static const char *getCOFFSectionPrefixForUniqueGlobal(SectionKind Kind) {
if (Kind.isText())
- return ".text$linkonce";
+ return ".text$";
if (Kind.isBSS ())
- return ".bss$linkonce";
+ return ".bss$";
if (Kind.isWriteable())
- return ".data$linkonce";
- return ".rdata$linkonce";
+ return ".data$";
+ return ".rdata$";
}
const char *Prefix = getCOFFSectionPrefixForUniqueGlobal(Kind);
SmallString<128> Name(Prefix, Prefix+strlen(Prefix));
MCSymbol *Sym = Mang->getSymbol(GV);
- Name.append(Sym->getName().begin(), Sym->getName().end());
+ Name.append(Sym->getName().begin() + 1, Sym->getName().end());
unsigned Characteristics = getCOFFSectionFlags(Kind);
Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
return getContext().getCOFFSection(Name.str(), Characteristics,
- COFF::IMAGE_COMDAT_SELECT_EXACT_MATCH, Kind);
+ COFF::IMAGE_COMDAT_SELECT_ANY, Kind);
}
if (Kind.isText())
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