//
//===----------------------------------------------------------------------===//
+#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCObjectStreamer.h"
#include "llvm/Support/ErrorHandling.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/MCSymbol.h"
-#include "llvm/Target/TargetAsmBackend.h"
+#include "llvm/MC/MCAsmBackend.h"
using namespace llvm;
-MCObjectStreamer::MCObjectStreamer(MCContext &Context, TargetAsmBackend &TAB,
- raw_ostream &_OS, MCCodeEmitter *_Emitter,
- bool _PadSectionToAlignment)
- : MCStreamer(Context), Assembler(new MCAssembler(Context, TAB,
- *_Emitter,
- _PadSectionToAlignment,
- _OS)),
+MCObjectStreamer::MCObjectStreamer(MCContext &Context, MCAsmBackend &TAB,
+ raw_ostream &OS, MCCodeEmitter *Emitter_)
+ : MCStreamer(Context),
+ Assembler(new MCAssembler(Context, TAB,
+ *Emitter_, *TAB.createObjectWriter(OS),
+ OS)),
CurSectionData(0)
{
}
+MCObjectStreamer::MCObjectStreamer(MCContext &Context, MCAsmBackend &TAB,
+ raw_ostream &OS, MCCodeEmitter *Emitter_,
+ MCAssembler *_Assembler)
+ : MCStreamer(Context), Assembler(_Assembler), CurSectionData(0)
+{
+}
+
MCObjectStreamer::~MCObjectStreamer() {
delete &Assembler->getBackend();
delete &Assembler->getEmitter();
+ delete &Assembler->getWriter();
delete Assembler;
}
const MCExpr *MCObjectStreamer::AddValueSymbols(const MCExpr *Value) {
switch (Value->getKind()) {
- case MCExpr::Target: llvm_unreachable("Can't handle target exprs yet!");
+ case MCExpr::Target:
+ cast<MCTargetExpr>(Value)->AddValueSymbols(Assembler);
+ break;
+
case MCExpr::Constant:
break;
return Value;
}
-void MCObjectStreamer::EmitValue(const MCExpr *Value, unsigned Size,
- unsigned AddrSpace) {
+void MCObjectStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
+ unsigned AddrSpace) {
assert(AddrSpace == 0 && "Address space must be 0!");
MCDataFragment *DF = getOrCreateDataFragment();
// Avoid fixups when possible.
int64_t AbsValue;
- if (AddValueSymbols(Value)->EvaluateAsAbsolute(AbsValue)) {
- // FIXME: Endianness assumption.
- for (unsigned i = 0; i != Size; ++i)
- DF->getContents().push_back(uint8_t(AbsValue >> (i * 8)));
- } else {
- DF->addFixup(MCFixup::Create(DF->getContents().size(),
- AddValueSymbols(Value),
- MCFixup::getKindForSize(Size, false)));
- DF->getContents().resize(DF->getContents().size() + Size, 0);
+ if (AddValueSymbols(Value)->EvaluateAsAbsolute(AbsValue, getAssembler())) {
+ EmitIntValue(AbsValue, Size, AddrSpace);
+ return;
}
+ DF->addFixup(MCFixup::Create(DF->getContents().size(),
+ Value,
+ 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(CurSection && "Cannot emit before setting section!");
+void MCObjectStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
+ RecordProcStart(Frame);
+}
- Symbol->setSection(*CurSection);
+void MCObjectStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
+ RecordProcEnd(Frame);
+}
+
+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);
+ 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);
+ return;
+ }
+ Value = ForceExpAbs(Value);
new MCLEBFragment(*Value, true, getCurrentSectionData());
}
report_fatal_error("This file format doesn't support weak aliases.");
}
-void MCObjectStreamer::SwitchSection(const MCSection *Section) {
+void MCObjectStreamer::ChangeSection(const MCSection *Section) {
assert(Section && "Cannot switch to a null section!");
- // If already in this section, then this is a noop.
- if (Section == CurSection) return;
-
- PrevSection = CurSection;
- CurSection = Section;
CurSectionData = &getAssembler().getOrCreateSectionData(*Section);
}
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());
+ VecOS.flush();
+ IF->getCode().append(Code.begin(), Code.end());
+}
+
+void MCObjectStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta,
+ const MCSymbol *LastLabel,
+ const MCSymbol *Label,
+ unsigned PointerSize) {
+ if (!LastLabel) {
+ EmitDwarfSetLineAddr(LineDelta, Label, PointerSize);
+ return;
+ }
+ const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel);
+ int64_t Res;
+ if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) {
+ MCDwarfLineAddr::Emit(this, LineDelta, Res);
+ return;
+ }
+ AddrDelta = ForceExpAbs(AddrDelta);
+ new MCDwarfLineAddrFragment(LineDelta, *AddrDelta, getCurrentSectionData());
}
-void MCObjectStreamer::EmitValueToOffset(const MCExpr *Offset,
- unsigned char Value) {
- new MCOrgFragment(*Offset, Value, getCurrentSectionData());
+void MCObjectStreamer::EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel,
+ const MCSymbol *Label) {
+ const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel);
+ int64_t Res;
+ if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) {
+ MCDwarfFrameEmitter::EmitAdvanceLoc(*this, Res);
+ return;
+ }
+ AddrDelta = ForceExpAbs(AddrDelta);
+ new MCDwarfCallFrameFragment(*AddrDelta, getCurrentSectionData());
}
-void MCObjectStreamer::Finish() {
+bool MCObjectStreamer::EmitValueToOffset(const MCExpr *Offset,
+ unsigned char Value) {
+ int64_t Res;
+ if (Offset->EvaluateAsAbsolute(Res, getAssembler())) {
+ new MCOrgFragment(*Offset, Value, getCurrentSectionData());
+ return false;
+ }
+
+ MCSymbol *CurrentPos = getContext().CreateTempSymbol();
+ EmitLabel(CurrentPos);
+ MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
+ const MCExpr *Ref =
+ MCSymbolRefExpr::Create(CurrentPos, Variant, getContext());
+ const MCExpr *Delta =
+ MCBinaryExpr::Create(MCBinaryExpr::Sub, Offset, Ref, getContext());
+
+ if (!Delta->EvaluateAsAbsolute(Res, getAssembler()))
+ 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);
+}
+
+void MCObjectStreamer::FinishImpl() {
+ // Dump out the dwarf file & directory tables and line tables.
+ const MCSymbol *LineSectionSymbol;
+ if (getContext().hasDwarfFiles())
+ 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();
}
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