//
//===----------------------------------------------------------------------===//
-#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCObjectStreamer.h"
-
-#include "llvm/Support/ErrorHandling.h"
+#include "llvm/MC/MCAsmBackend.h"
+#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCSymbol.h"
-#include "llvm/Target/TargetAsmBackend.h"
-#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
-MCObjectStreamer::MCObjectStreamer(MCContext &Context, TargetAsmBackend &TAB,
+MCObjectStreamer::MCObjectStreamer(MCContext &Context, MCAsmBackend &TAB,
raw_ostream &OS, MCCodeEmitter *Emitter_)
: MCStreamer(Context),
Assembler(new MCAssembler(Context, TAB,
{
}
-MCObjectStreamer::MCObjectStreamer(MCContext &Context, TargetAsmBackend &TAB,
+MCObjectStreamer::MCObjectStreamer(MCContext &Context, MCAsmBackend &TAB,
raw_ostream &OS, MCCodeEmitter *Emitter_,
MCAssembler *_Assembler)
: MCStreamer(Context), Assembler(_Assembler), CurSectionData(0)
}
void MCObjectStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
- bool isPCRel, unsigned AddrSpace) {
+ unsigned AddrSpace) {
assert(AddrSpace == 0 && "Address space must be 0!");
MCDataFragment *DF = getOrCreateDataFragment();
}
DF->addFixup(MCFixup::Create(DF->getContents().size(),
Value,
- MCFixup::getKindForSize(Size, isPCRel)));
+ MCFixup::getKindForSize(Size, false)));
DF->getContents().resize(DF->getContents().size() + Size, 0);
}
-void MCObjectStreamer::EmitLabel(MCSymbol *Symbol) {
- assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
- assert(getCurrentSection() && "Cannot emit before setting section!");
+void MCObjectStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
+ RecordProcStart(Frame);
+}
+
+void MCObjectStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
+ RecordProcEnd(Frame);
+}
- Symbol->setSection(*getCurrentSection());
+void MCObjectStreamer::EmitLabel(MCSymbol *Symbol) {
+ MCStreamer::EmitLabel(Symbol);
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
SD.setOffset(F->getContents().size());
}
-void MCObjectStreamer::EmitULEB128Value(const MCExpr *Value,
- unsigned AddrSpace) {
+void MCObjectStreamer::EmitULEB128Value(const MCExpr *Value) {
int64_t IntValue;
if (Value->EvaluateAsAbsolute(IntValue, getAssembler())) {
- EmitULEB128IntValue(IntValue, AddrSpace);
+ EmitULEB128IntValue(IntValue);
return;
}
+ Value = ForceExpAbs(Value);
new MCLEBFragment(*Value, false, getCurrentSectionData());
}
-void MCObjectStreamer::EmitSLEB128Value(const MCExpr *Value,
- unsigned AddrSpace) {
+void MCObjectStreamer::EmitSLEB128Value(const MCExpr *Value) {
int64_t IntValue;
if (Value->EvaluateAsAbsolute(IntValue, getAssembler())) {
- EmitSLEB128IntValue(IntValue, AddrSpace);
+ EmitSLEB128IntValue(IntValue);
return;
}
+ Value = ForceExpAbs(Value);
new MCLEBFragment(*Value, true, getCurrentSectionData());
}
MCLineEntry::Make(this, getCurrentSection());
// If this instruction doesn't need relaxation, just emit it as data.
- if (!getAssembler().getBackend().MayNeedRelaxation(Inst)) {
+ if (!getAssembler().getBackend().mayNeedRelaxation(Inst)) {
EmitInstToData(Inst);
return;
}
// possible and emit it as data.
if (getAssembler().getRelaxAll()) {
MCInst Relaxed;
- getAssembler().getBackend().RelaxInstruction(Inst, Relaxed);
- while (getAssembler().getBackend().MayNeedRelaxation(Relaxed))
- getAssembler().getBackend().RelaxInstruction(Relaxed, Relaxed);
+ getAssembler().getBackend().relaxInstruction(Inst, Relaxed);
+ while (getAssembler().getBackend().mayNeedRelaxation(Relaxed))
+ getAssembler().getBackend().relaxInstruction(Relaxed, Relaxed);
EmitInstToData(Relaxed);
return;
}
void MCObjectStreamer::EmitInstToFragment(const MCInst &Inst) {
MCInstFragment *IF = new MCInstFragment(Inst, getCurrentSectionData());
- raw_svector_ostream VecOS(IF->getCode());
+ SmallString<128> Code;
+ raw_svector_ostream VecOS(Code);
getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, IF->getFixups());
-}
-
-static const MCExpr *BuildSymbolDiff(MCContext &Context,
- const MCSymbol *A, const MCSymbol *B) {
- MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
- const MCExpr *ARef =
- MCSymbolRefExpr::Create(A, Variant, Context);
- const MCExpr *BRef =
- MCSymbolRefExpr::Create(B, Variant, Context);
- const MCExpr *AddrDelta =
- MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
- return AddrDelta;
-}
-
-static const MCExpr *ForceExpAbs(MCObjectStreamer *Streamer,
- MCContext &Context, const MCExpr* Expr) {
- if (Context.getAsmInfo().hasAggressiveSymbolFolding())
- return Expr;
-
- MCSymbol *ABS = Context.CreateTempSymbol();
- Streamer->EmitAssignment(ABS, Expr);
- return MCSymbolRefExpr::Create(ABS, Context);
+ VecOS.flush();
+ IF->getCode().append(Code.begin(), Code.end());
}
void MCObjectStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta,
const MCSymbol *LastLabel,
- const MCSymbol *Label) {
+ const MCSymbol *Label,
+ unsigned PointerSize) {
if (!LastLabel) {
- int PointerSize = getContext().getTargetAsmInfo().getPointerSize();
EmitDwarfSetLineAddr(LineDelta, Label, PointerSize);
return;
}
MCDwarfLineAddr::Emit(this, LineDelta, Res);
return;
}
- AddrDelta = ForceExpAbs(this, getContext(), AddrDelta);
+ AddrDelta = ForceExpAbs(AddrDelta);
new MCDwarfLineAddrFragment(LineDelta, *AddrDelta, getCurrentSectionData());
}
MCDwarfFrameEmitter::EmitAdvanceLoc(*this, Res);
return;
}
- AddrDelta = ForceExpAbs(this, getContext(), AddrDelta);
+ AddrDelta = ForceExpAbs(AddrDelta);
new MCDwarfCallFrameFragment(*AddrDelta, getCurrentSectionData());
}
-void MCObjectStreamer::EmitValueToOffset(const MCExpr *Offset,
- unsigned char Value) {
+void MCObjectStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
+ assert(AddrSpace == 0 && "Address space must be 0!");
+ getOrCreateDataFragment()->getContents().append(Data.begin(), Data.end());
+}
+
+void MCObjectStreamer::EmitValueToAlignment(unsigned ByteAlignment,
+ int64_t Value,
+ unsigned ValueSize,
+ unsigned MaxBytesToEmit) {
+ 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 MCObjectStreamer::EmitCodeAlignment(unsigned ByteAlignment,
+ unsigned MaxBytesToEmit) {
+ EmitValueToAlignment(ByteAlignment, 0, 1, MaxBytesToEmit);
+ cast<MCAlignFragment>(getCurrentFragment())->setEmitNops(true);
+}
+
+bool MCObjectStreamer::EmitValueToOffset(const MCExpr *Offset,
+ unsigned char Value) {
int64_t Res;
if (Offset->EvaluateAsAbsolute(Res, getAssembler())) {
new MCOrgFragment(*Offset, Value, getCurrentSectionData());
- return;
+ return false;
}
MCSymbol *CurrentPos = getContext().CreateTempSymbol();
MCBinaryExpr::Create(MCBinaryExpr::Sub, Offset, Ref, getContext());
if (!Delta->EvaluateAsAbsolute(Res, getAssembler()))
- report_fatal_error("expected assembly-time absolute expression");
+ return true;
EmitFill(Res, Value, 0);
+ return false;
+}
+
+// Associate GPRel32 fixup with data and resize data area
+void MCObjectStreamer::EmitGPRel32Value(const MCExpr *Value) {
+ MCDataFragment *DF = getOrCreateDataFragment();
+
+ DF->addFixup(MCFixup::Create(DF->getContents().size(), Value, FK_GPRel_4));
+ DF->getContents().resize(DF->getContents().size() + 4, 0);
+}
+
+// Associate GPRel32 fixup with data and resize data area
+void MCObjectStreamer::EmitGPRel64Value(const MCExpr *Value) {
+ MCDataFragment *DF = getOrCreateDataFragment();
+
+ DF->addFixup(MCFixup::Create(DF->getContents().size(), Value, FK_GPRel_4));
+ DF->getContents().resize(DF->getContents().size() + 8, 0);
}
-void MCObjectStreamer::Finish() {
+void MCObjectStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
+ unsigned AddrSpace) {
+ assert(AddrSpace == 0 && "Address space must be 0!");
+ // FIXME: A MCFillFragment would be more memory efficient but MCExpr has
+ // problems evaluating expressions across multiple fragments.
+ getOrCreateDataFragment()->getContents().append(NumBytes, FillValue);
+}
+
+void MCObjectStreamer::FinishImpl() {
// Dump out the dwarf file & directory tables and line tables.
+ const MCSymbol *LineSectionSymbol = NULL;
if (getContext().hasDwarfFiles())
- MCDwarfFileTable::Emit(this);
+ LineSectionSymbol = MCDwarfFileTable::Emit(this);
+
+ // If we are generating dwarf for assembly source files dump out the sections.
+ if (getContext().getGenDwarfForAssembly())
+ MCGenDwarfInfo::Emit(this, LineSectionSymbol);
getAssembler().Finish();
}
projects / oota-llvm.git / blobdiff