#define DEBUG_TYPE "WinCOFFStreamer"
-#include "llvm/MC/MCObjectStreamer.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCAsmBackend.h"
+#include "llvm/MC/MCAsmLayout.h"
+#include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCObjectStreamer.h"
#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSectionCOFF.h"
#include "llvm/MC/MCSymbol.h"
-#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCValue.h"
-#include "llvm/MC/MCAssembler.h"
-#include "llvm/MC/MCAsmLayout.h"
-#include "llvm/MC/MCCodeEmitter.h"
-#include "llvm/MC/MCSectionCOFF.h"
#include "llvm/MC/MCWin64EH.h"
-#include "llvm/MC/MCAsmBackend.h"
-#include "llvm/ADT/StringMap.h"
-
#include "llvm/Support/COFF.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
+
using namespace llvm;
namespace {
// MCStreamer interface
- virtual void InitSections();
+ virtual void InitSections(bool Force);
virtual void EmitLabel(MCSymbol *Symbol);
+ virtual void EmitDebugLabel(MCSymbol *Symbol);
virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
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 BeginCOFFSymbolDef(MCSymbol const *Symbol);
virtual void EmitCOFFSymbolStorageClass(int StorageClass);
virtual void EmitCOFFSymbolType(int Type);
virtual void EndCOFFSymbolDef();
+ virtual void EmitCOFFSectionIndex(MCSymbol const *Symbol);
+ virtual void EmitCOFFSecRel32(MCSymbol const *Symbol);
virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value);
virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment);
- virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size);
+ virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment);
virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
- unsigned Size,unsigned ByteAlignment);
+ uint64_t Size,unsigned ByteAlignment);
virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
uint64_t Size, unsigned ByteAlignment);
- virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
- virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
- unsigned ValueSize, unsigned MaxBytesToEmit);
- virtual void EmitCodeAlignment(unsigned ByteAlignment,
- unsigned MaxBytesToEmit);
virtual void EmitFileDirective(StringRef Filename);
- virtual void EmitInstruction(const MCInst &Instruction);
+ virtual void EmitIdent(StringRef IdentString);
virtual void EmitWin64EHHandlerData();
- virtual void Finish();
+ virtual void FinishImpl();
private:
- virtual void EmitInstToFragment(const MCInst &Inst) {
- llvm_unreachable("Not used by WinCOFF.");
- }
virtual void EmitInstToData(const MCInst &Inst) {
- llvm_unreachable("Not used by WinCOFF.");
- }
-
- void SetSection(StringRef Section,
- unsigned Characteristics,
- SectionKind Kind) {
- SwitchSection(getContext().getCOFFSection(Section, Characteristics, Kind));
- }
-
- void SetSectionText() {
- SetSection(".text",
- COFF::IMAGE_SCN_CNT_CODE
- | COFF::IMAGE_SCN_MEM_EXECUTE
- | COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getText());
- EmitCodeAlignment(4, 0);
- }
-
- void SetSectionData() {
- SetSection(".data",
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA
- | COFF::IMAGE_SCN_MEM_READ
- | COFF::IMAGE_SCN_MEM_WRITE,
- SectionKind::getDataRel());
- EmitCodeAlignment(4, 0);
- }
-
- void SetSectionBSS() {
- SetSection(".bss",
- COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA
- | COFF::IMAGE_SCN_MEM_READ
- | COFF::IMAGE_SCN_MEM_WRITE,
- SectionKind::getBSS());
- EmitCodeAlignment(4, 0);
+ MCDataFragment *DF = getOrCreateDataFragment();
+
+ SmallVector<MCFixup, 4> Fixups;
+ SmallString<256> Code;
+ raw_svector_ostream VecOS(Code);
+ getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, Fixups);
+ VecOS.flush();
+
+ // 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->getFixups().push_back(Fixups[i]);
+ }
+ DF->getContents().append(Code.begin(), Code.end());
}
-
};
} // end anonymous namespace.
-WinCOFFStreamer::WinCOFFStreamer(MCContext &Context,
- MCAsmBackend &MAB,
- MCCodeEmitter &CE,
- raw_ostream &OS)
- : MCObjectStreamer(Context, MAB, OS, &CE)
- , CurSymbol(NULL) {
-}
+WinCOFFStreamer::WinCOFFStreamer(MCContext &Context, MCAsmBackend &MAB,
+ MCCodeEmitter &CE, raw_ostream &OS)
+ : MCObjectStreamer(Context, 0, MAB, OS, &CE), CurSymbol(NULL) {}
void WinCOFFStreamer::AddCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment, bool External) {
assert(!Symbol->isInSection() && "Symbol must not already have a section!");
- std::string SectionName(".bss$linkonce");
- SectionName.append(Symbol->getName().begin(), Symbol->getName().end());
-
- MCSymbolData &SymbolData = getAssembler().getOrCreateSymbolData(*Symbol);
-
- unsigned Characteristics =
- COFF::IMAGE_SCN_LNK_COMDAT |
- COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ |
- COFF::IMAGE_SCN_MEM_WRITE;
-
- int Selection = COFF::IMAGE_COMDAT_SELECT_LARGEST;
-
- const MCSection *Section = MCStreamer::getContext().getCOFFSection(
- SectionName, Characteristics, Selection, SectionKind::getBSS());
-
+ const MCSection *Section = getContext().getObjectFileInfo()->getBSSSection();
MCSectionData &SectionData = getAssembler().getOrCreateSectionData(*Section);
-
if (SectionData.getAlignment() < ByteAlignment)
SectionData.setAlignment(ByteAlignment);
+ MCSymbolData &SymbolData = getAssembler().getOrCreateSymbolData(*Symbol);
SymbolData.setExternal(External);
- Symbol->setSection(*Section);
+ AssignSection(Symbol, Section);
if (ByteAlignment != 1)
new MCAlignFragment(ByteAlignment, 0, 0, ByteAlignment, &SectionData);
// MCStreamer interface
-void WinCOFFStreamer::InitSections() {
- SetSectionText();
- SetSectionData();
- SetSectionBSS();
- SetSectionText();
+void WinCOFFStreamer::InitSections(bool Force) {
+ // FIXME: this is identical to the ELF one.
+ // This emulates the same behavior of GNU as. This makes it easier
+ // to compare the output as the major sections are in the same order.
+ SwitchSection(getContext().getObjectFileInfo()->getTextSection());
+ EmitCodeAlignment(4, 0);
+
+ SwitchSection(getContext().getObjectFileInfo()->getDataSection());
+ EmitCodeAlignment(4, 0);
+
+ SwitchSection(getContext().getObjectFileInfo()->getBSSSection());
+ EmitCodeAlignment(4, 0);
+
+ SwitchSection(getContext().getObjectFileInfo()->getTextSection());
}
void WinCOFFStreamer::EmitLabel(MCSymbol *Symbol) {
MCObjectStreamer::EmitLabel(Symbol);
}
+void WinCOFFStreamer::EmitDebugLabel(MCSymbol *Symbol) {
+ EmitLabel(Symbol);
+}
void WinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
llvm_unreachable("not implemented");
}
llvm_unreachable("not implemented");
}
-void WinCOFFStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
- assert((Symbol->isInSection()
- ? Symbol->getSection().getVariant() == MCSection::SV_COFF
- : true) && "Got non COFF section in the COFF backend!");
- // FIXME: This is all very ugly and depressing. What needs to happen here
- // depends on quite a few things that are all part of relaxation, which we
- // don't really even do.
-
- if (Value->getKind() != MCExpr::SymbolRef) {
- // TODO: This is exactly the same as MachOStreamer. Consider merging into
- // MCObjectStreamer.
- getAssembler().getOrCreateSymbolData(*Symbol);
- AddValueSymbols(Value);
- Symbol->setVariableValue(Value);
- } else {
- // FIXME: This is a horrible way to do this :(. This should really be
- // handled after we are done with the MC* objects and immediately before
- // writing out the object file when we know exactly what the symbol should
- // look like in the coff symbol table. I'm not doing that now because the
- // COFF object writer doesn't have a clearly defined separation between MC
- // data structures, the object writers data structures, and the raw, POD,
- // data structures that get written to disk.
-
- // Copy over the aliased data.
- MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
- const MCSymbolData &RealSD = getAssembler().getOrCreateSymbolData(
- dyn_cast<const MCSymbolRefExpr>(Value)->getSymbol());
-
- // FIXME: This is particularly nasty because it breaks as soon as any data
- // members of MCSymbolData change.
- SD.CommonAlign = RealSD.CommonAlign;
- SD.CommonSize = RealSD.CommonSize;
- SD.Flags = RealSD.Flags;
- SD.Fragment = RealSD.Fragment;
- SD.Index = RealSD.Index;
- SD.IsExternal = RealSD.IsExternal;
- SD.IsPrivateExtern = RealSD.IsPrivateExtern;
- SD.Offset = RealSD.Offset;
- SD.SymbolSize = RealSD.SymbolSize;
- }
-}
-
-void WinCOFFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
+bool WinCOFFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
MCSymbolAttr Attribute) {
assert(Symbol && "Symbol must be non-null!");
assert((Symbol->isInSection()
? Symbol->getSection().getVariant() == MCSection::SV_COFF
- : true) && "Got non COFF section in the COFF backend!");
+ : true) && "Got non-COFF section in the COFF backend!");
switch (Attribute) {
case MCSA_WeakReference:
case MCSA_Weak: {
break;
default:
- llvm_unreachable("unsupported attribute");
- break;
+ return false;
}
+
+ return true;
}
void WinCOFFStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
void WinCOFFStreamer::BeginCOFFSymbolDef(MCSymbol const *Symbol) {
assert((Symbol->isInSection()
? Symbol->getSection().getVariant() == MCSection::SV_COFF
- : true) && "Got non COFF section in the COFF backend!");
+ : true) && "Got non-COFF section in the COFF backend!");
assert(CurSymbol == NULL && "EndCOFFSymbolDef must be called between calls "
"to BeginCOFFSymbolDef!");
CurSymbol = Symbol;
CurSymbol = NULL;
}
+void WinCOFFStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
+ MCDataFragment *DF = getOrCreateDataFragment();
+ DF->getFixups().push_back(MCFixup::Create(
+ DF->getContents().size(), MCSymbolRefExpr::Create(Symbol, getContext()),
+ FK_SecRel_2));
+ DF->getContents().resize(DF->getContents().size() + 4, 0);
+}
+
+void WinCOFFStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
+ MCDataFragment *DF = getOrCreateDataFragment();
+ DF->getFixups().push_back(MCFixup::Create(
+ DF->getContents().size(), MCSymbolRefExpr::Create(Symbol, getContext()),
+ FK_SecRel_4));
+ DF->getContents().resize(DF->getContents().size() + 4, 0);
+}
+
void WinCOFFStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
llvm_unreachable("not implemented");
}
unsigned ByteAlignment) {
assert((Symbol->isInSection()
? Symbol->getSection().getVariant() == MCSection::SV_COFF
- : true) && "Got non COFF section in the COFF backend!");
+ : true) && "Got non-COFF section in the COFF backend!");
AddCommonSymbol(Symbol, Size, ByteAlignment, true);
}
-void WinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) {
+void WinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) {
assert((Symbol->isInSection()
? Symbol->getSection().getVariant() == MCSection::SV_COFF
- : true) && "Got non COFF section in the COFF backend!");
- AddCommonSymbol(Symbol, Size, 1, false);
+ : true) && "Got non-COFF section in the COFF backend!");
+ AddCommonSymbol(Symbol, Size, ByteAlignment, false);
}
void WinCOFFStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
- unsigned Size,unsigned ByteAlignment) {
+ uint64_t Size,unsigned ByteAlignment) {
llvm_unreachable("not implemented");
}
llvm_unreachable("not implemented");
}
-void WinCOFFStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
- // TODO: This is copied exactly from the MachOStreamer. Consider merging into
- // MCObjectStreamer?
- getOrCreateDataFragment()->getContents().append(Data.begin(), Data.end());
-}
-
-void WinCOFFStreamer::EmitValueToAlignment(unsigned ByteAlignment,
- int64_t Value,
- unsigned ValueSize,
- unsigned MaxBytesToEmit) {
- // TODO: This is copied exactly from the MachOStreamer. 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 WinCOFFStreamer::EmitCodeAlignment(unsigned ByteAlignment,
- unsigned MaxBytesToEmit) {
- // TODO: This is copied exactly from the MachOStreamer. 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 WinCOFFStreamer::EmitFileDirective(StringRef Filename) {
// Ignore for now, linkers don't care, and proper debug
// info will be a much large effort.
}
-void WinCOFFStreamer::EmitInstruction(const MCInst &Instruction) {
- for (unsigned i = 0, e = Instruction.getNumOperands(); i != e; ++i)
- if (Instruction.getOperand(i).isExpr())
- AddValueSymbols(Instruction.getOperand(i).getExpr());
-
- getCurrentSectionData()->setHasInstructions(true);
-
- MCInstFragment *Fragment =
- new MCInstFragment(Instruction, getCurrentSectionData());
-
- raw_svector_ostream VecOS(Fragment->getCode());
-
- getAssembler().getEmitter().EncodeInstruction(Instruction, VecOS,
- Fragment->getFixups());
+// TODO: Implement this if you want to emit .comment section in COFF obj files.
+void WinCOFFStreamer::EmitIdent(StringRef IdentString) {
+ llvm_unreachable("unsupported directive");
}
void WinCOFFStreamer::EmitWin64EHHandlerData() {
MCWin64EHUnwindEmitter::EmitUnwindInfo(*this, getCurrentW64UnwindInfo());
}
-void WinCOFFStreamer::Finish() {
+void WinCOFFStreamer::FinishImpl() {
+ EmitFrames(NULL, true);
EmitW64Tables();
- MCObjectStreamer::Finish();
+ MCObjectStreamer::FinishImpl();
}
namespace llvm
projects / oota-llvm.git / blobdiff