+//===-- MCMachOStreamer.cpp - MachO Streamer ------------------------------===//
//
// The LLVM Compiler Infrastructure
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCStreamer.h"
-
+#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCAssembler.h"
-#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCCodeEmitter.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCMachOSymbolFlags.h"
#include "llvm/MC/MCObjectStreamer.h"
#include "llvm/MC/MCSection.h"
-#include "llvm/MC/MCSymbol.h"
-#include "llvm/MC/MCMachOSymbolFlags.h"
#include "llvm/MC/MCSectionMachO.h"
-#include "llvm/MC/MCDwarf.h"
-#include "llvm/MC/MCAsmBackend.h"
+#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
void EmitDataRegion(DataRegionData::KindTy Kind);
void EmitDataRegionEnd();
public:
- MCMachOStreamer(MCContext &Context, MCAsmBackend &MAB,
- raw_ostream &OS, MCCodeEmitter *Emitter)
- : MCObjectStreamer(Context, MAB, OS, Emitter) {}
+ MCMachOStreamer(MCContext &Context, MCAsmBackend &MAB, raw_ostream &OS,
+ MCCodeEmitter *Emitter)
+ : MCObjectStreamer(SK_MachOStreamer, Context, MAB, OS, Emitter) {}
/// @name MCStreamer Interface
/// @{
virtual void InitSections();
+ virtual void InitToTextSection();
virtual void EmitLabel(MCSymbol *Symbol);
+ virtual void EmitDebugLabel(MCSymbol *Symbol);
virtual void EmitEHSymAttributes(const MCSymbol *Symbol,
MCSymbol *EHSymbol);
virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
+ virtual void EmitLinkerOptions(ArrayRef<std::string> Options);
virtual void EmitDataRegion(MCDataRegionType Kind);
virtual void EmitThumbFunc(MCSymbol *Func);
- virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
- virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
+ virtual bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment);
uint64_t Size = 0, unsigned ByteAlignment = 0);
virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
uint64_t Size, unsigned ByteAlignment = 0);
- virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
- virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
- unsigned ValueSize = 1,
- unsigned MaxBytesToEmit = 0);
- virtual void EmitCodeAlignment(unsigned ByteAlignment,
- unsigned MaxBytesToEmit = 0);
virtual void EmitFileDirective(StringRef Filename) {
// FIXME: Just ignore the .file; it isn't important enough to fail the
virtual void FinishImpl();
/// @}
+
+ static bool classof(const MCStreamer *S) {
+ return S->getKind() == SK_MachOStreamer;
+ }
};
} // end anonymous namespace.
void MCMachOStreamer::InitSections() {
- SwitchSection(getContext().getMachOSection("__TEXT", "__text",
- MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
- 0, SectionKind::getText()));
+ InitToTextSection();
+}
+void MCMachOStreamer::InitToTextSection() {
+ SwitchSection(getContext().getMachOSection(
+ "__TEXT", "__text",
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS, 0,
+ SectionKind::getText()));
}
void MCMachOStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
// isSymbolLinkerVisible uses the section.
- Symbol->setSection(*getCurrentSection());
+ Symbol->setSection(*getCurrentSection().first);
// We have to create a new fragment if this is an atom defining symbol,
// fragments cannot span atoms.
if (getAssembler().isSymbolLinkerVisible(*Symbol))
- new MCDataFragment(getCurrentSectionData());
+ insert(new MCDataFragment());
MCObjectStreamer::EmitLabel(Symbol);
SD.setFlags(SD.getFlags() & ~SF_ReferenceTypeMask);
}
+void MCMachOStreamer::EmitDebugLabel(MCSymbol *Symbol) {
+ EmitLabel(Symbol);
+}
void MCMachOStreamer::EmitDataRegion(DataRegionData::KindTy Kind) {
if (!getAssembler().getBackend().hasDataInCodeSupport())
return;
}
}
+void MCMachOStreamer::EmitLinkerOptions(ArrayRef<std::string> Options) {
+ getAssembler().getLinkerOptions().push_back(Options);
+}
+
void MCMachOStreamer::EmitDataRegion(MCDataRegionType Kind) {
switch (Kind) {
case MCDR_DataRegion:
SD.setFlags(SD.getFlags() | SF_ThumbFunc);
}
-void MCMachOStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
- // TODO: This is exactly the same as WinCOFFStreamer. Consider merging into
- // MCObjectStreamer.
- // FIXME: Lift context changes into super class.
- getAssembler().getOrCreateSymbolData(*Symbol);
- Symbol->setVariableValue(AddValueSymbols(Value));
-}
-
-void MCMachOStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
+bool MCMachOStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
MCSymbolAttr Attribute) {
// Indirect symbols are handled differently, to match how 'as' handles
// them. This makes writing matching .o files easier.
ISD.Symbol = Symbol;
ISD.SectionData = getCurrentSectionData();
getAssembler().getIndirectSymbols().push_back(ISD);
- return;
+ return true;
}
// Adding a symbol attribute always introduces the symbol, note that an
case MCSA_Protected:
case MCSA_Weak:
case MCSA_Local:
- llvm_unreachable("Invalid symbol attribute for Mach-O!");
+ return false;
case MCSA_Global:
SD.setExternal(true);
SD.setFlags(SD.getFlags() | SF_WeakDefinition | SF_WeakReference);
break;
}
+
+ return true;
}
void MCMachOStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
if (!Symbol)
return;
- // FIXME: Assert that this section has the zerofill type.
+ // On darwin all virtual sections have zerofill type.
+ assert(Section->isVirtualSection() && "Section does not have zerofill type!");
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
return;
}
-void MCMachOStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
- // TODO: This is exactly the same as WinCOFFStreamer. Consider merging into
- // MCObjectStreamer.
- getOrCreateDataFragment()->getContents().append(Data.begin(), Data.end());
-}
-
-void MCMachOStreamer::EmitValueToAlignment(unsigned ByteAlignment,
- int64_t Value, unsigned ValueSize,
- unsigned MaxBytesToEmit) {
- // TODO: This is exactly the same as WinCOFFStreamer. Consider merging into
- // MCObjectStreamer.
- if (MaxBytesToEmit == 0)
- MaxBytesToEmit = ByteAlignment;
- new MCAlignFragment(ByteAlignment, Value, ValueSize, MaxBytesToEmit,
- getCurrentSectionData());
-
- // Update the maximum alignment on the current section if necessary.
- if (ByteAlignment > getCurrentSectionData()->getAlignment())
- getCurrentSectionData()->setAlignment(ByteAlignment);
-}
-
-void MCMachOStreamer::EmitCodeAlignment(unsigned ByteAlignment,
- unsigned MaxBytesToEmit) {
- // TODO: This is exactly the same as WinCOFFStreamer. Consider merging into
- // MCObjectStreamer.
- if (MaxBytesToEmit == 0)
- MaxBytesToEmit = ByteAlignment;
- MCAlignFragment *F = new MCAlignFragment(ByteAlignment, 0, 1, MaxBytesToEmit,
- getCurrentSectionData());
- F->setEmitNops(true);
-
- // Update the maximum alignment on the current section if necessary.
- if (ByteAlignment > getCurrentSectionData()->getAlignment())
- getCurrentSectionData()->setAlignment(ByteAlignment);
-}
-
void MCMachOStreamer::EmitInstToData(const MCInst &Inst) {
MCDataFragment *DF = getOrCreateDataFragment();
// Add the fixups and data.
for (unsigned i = 0, e = Fixups.size(); i != e; ++i) {
Fixups[i].setOffset(Fixups[i].getOffset() + DF->getContents().size());
- DF->addFixup(Fixups[i]);
+ DF->getFixups().push_back(Fixups[i]);
}
DF->getContents().append(Code.begin(), Code.end());
}
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