+//===-- MCMachOStreamer.cpp - MachO Streamer ------------------------------===//
//
// The LLVM Compiler Infrastructure
//
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCMachOSymbolFlags.h"
+#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCObjectStreamer.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSectionMachO.h"
class MCMachOStreamer : public MCObjectStreamer {
private:
- virtual void EmitInstToData(const MCInst &Inst);
+ void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &STI) override;
void EmitDataRegion(DataRegionData::KindTy Kind);
void EmitDataRegionEnd();
public:
MCMachOStreamer(MCContext &Context, MCAsmBackend &MAB, raw_ostream &OS,
MCCodeEmitter *Emitter)
- : MCObjectStreamer(SK_MachOStreamer, Context, MAB, OS, Emitter) {}
+ : MCObjectStreamer(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 EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
- virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
- virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
- unsigned ByteAlignment);
- virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) {
+ void EmitLabel(MCSymbol *Symbol) override;
+ void EmitDebugLabel(MCSymbol *Symbol) override;
+ void EmitEHSymAttributes(const MCSymbol *Symbol, MCSymbol *EHSymbol) override;
+ void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
+ void EmitLinkerOptions(ArrayRef<std::string> Options) override;
+ void EmitDataRegion(MCDataRegionType Kind) override;
+ void EmitThumbFunc(MCSymbol *Func) override;
+ bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
+ void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
+ void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) override;
+ void BeginCOFFSymbolDef(const MCSymbol *Symbol) override {
llvm_unreachable("macho doesn't support this directive");
}
- virtual void EmitCOFFSymbolStorageClass(int StorageClass) {
+ void EmitCOFFSymbolStorageClass(int StorageClass) override {
llvm_unreachable("macho doesn't support this directive");
}
- virtual void EmitCOFFSymbolType(int Type) {
+ void EmitCOFFSymbolType(int Type) override {
llvm_unreachable("macho doesn't support this directive");
}
- virtual void EndCOFFSymbolDef() {
+ void EndCOFFSymbolDef() override {
llvm_unreachable("macho doesn't support this directive");
}
- virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
+ void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) override {
llvm_unreachable("macho doesn't support this directive");
}
- virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
- unsigned ByteAlignment);
- virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
- uint64_t Size = 0, unsigned ByteAlignment = 0);
+ void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) override;
+ void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
+ uint64_t Size = 0, unsigned ByteAlignment = 0) override;
virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
- uint64_t Size, unsigned ByteAlignment = 0);
+ uint64_t Size, unsigned ByteAlignment = 0) override;
- virtual void EmitFileDirective(StringRef Filename) {
+ void EmitFileDirective(StringRef Filename) override {
// FIXME: Just ignore the .file; it isn't important enough to fail the
// entire assembly.
- //report_fatal_error("unsupported directive: '.file'");
+ // report_fatal_error("unsupported directive: '.file'");
}
- virtual void FinishImpl();
-
- /// @}
-
- static bool classof(const MCStreamer *S) {
- return S->getKind() == SK_MachOStreamer;
+ void EmitIdent(StringRef IdentString) override {
+ llvm_unreachable("macho doesn't support this directive");
}
+
+ void FinishImpl() override;
};
} // end anonymous namespace.
-void MCMachOStreamer::InitSections() {
- InitToTextSection();
-}
-
-void MCMachOStreamer::InitToTextSection() {
- SwitchSection(getContext().getMachOSection(
- "__TEXT", "__text",
- MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS, 0,
- SectionKind::getText()));
-}
-
void MCMachOStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
MCSymbol *EHSymbol) {
MCSymbolData &SD =
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
// isSymbolLinkerVisible uses the section.
- Symbol->setSection(*getCurrentSection().first);
+ AssignSection(Symbol, getCurrentSection().first);
// We have to create a new fragment if this is an atom defining symbol,
// fragments cannot span atoms.
if (getAssembler().isSymbolLinkerVisible(*Symbol))
SD.setFlags(SD.getFlags() | SF_ThumbFunc);
}
-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) {
// FIXME: Darwin 'as' does appear to allow redef of a .comm by itself.
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
+ AssignSection(Symbol, NULL);
+
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
SD.setExternal(true);
SD.setCommon(Size, ByteAlignment);
void MCMachOStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment) {
// '.lcomm' is equivalent to '.zerofill'.
- return EmitZerofill(getContext().getMachOSection("__DATA", "__bss",
- MCSectionMachO::S_ZEROFILL,
- 0, SectionKind::getBSS()),
+ return EmitZerofill(getContext().getObjectFileInfo()->getDataBSSSection(),
Symbol, Size, ByteAlignment);
}
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!");
MCFragment *F = new MCFillFragment(0, 0, Size, &SectData);
SD.setFragment(F);
- Symbol->setSection(*Section);
+ AssignSection(Symbol, Section);
// Update the maximum alignment on the zero fill section if necessary.
if (ByteAlignment > SectData.getAlignment())
return;
}
-void MCMachOStreamer::EmitInstToData(const MCInst &Inst) {
+void MCMachOStreamer::EmitInstToData(const MCInst &Inst,
+ const MCSubtargetInfo &STI) {
MCDataFragment *DF = getOrCreateDataFragment();
SmallVector<MCFixup, 4> Fixups;
SmallString<256> Code;
raw_svector_ostream VecOS(Code);
- getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, Fixups);
+ getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, Fixups, STI);
VecOS.flush();
// Add the fixups and data.
}
void MCMachOStreamer::FinishImpl() {
- EmitFrames(true);
+ EmitFrames(&getAssembler().getBackend(), true);
// We have to set the fragment atom associations so we can relax properly for
// Mach-O.
projects / oota-llvm.git / blobdiff