//
//===----------------------------------------------------------------------===//
+#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/SmallString.h"
#include <cstdlib>
using namespace llvm;
-MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), CurSection(0),
- PrevSection(0) {
+MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), EmitEHFrame(true),
+ EmitDebugFrame(false) {
+ const MCSection *section = NULL;
+ SectionStack.push_back(std::make_pair(section, section));
}
MCStreamer::~MCStreamer() {
}
+const MCExpr *MCStreamer::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;
+}
+
+const MCExpr *MCStreamer::ForceExpAbs(MCStreamer *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);
+}
+
raw_ostream &MCStreamer::GetCommentOS() {
// By default, discard comments.
return nulls();
/// pass in a MCExpr for constant integers.
void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
unsigned AddrSpace) {
- EmitValue(MCConstantExpr::Create(Value, getContext()), Size, AddrSpace);
+ assert(Size <= 8 && "Invalid size");
+ assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
+ "Invalid size");
+ char buf[8];
+ // FIXME: Endianness assumption.
+ for (unsigned i = 0; i != Size; ++i)
+ buf[i] = uint8_t(Value >> (i * 8));
+ EmitBytes(StringRef(buf, Size), AddrSpace);
}
/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
/// client having to pass in a MCExpr for constant integers.
void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace) {
- EmitULEB128Value(MCConstantExpr::Create(Value, getContext()), AddrSpace);
+ SmallString<32> Tmp;
+ raw_svector_ostream OSE(Tmp);
+ MCObjectWriter::EncodeULEB128(Value, OSE);
+ EmitBytes(OSE.str(), AddrSpace);
}
/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
/// client having to pass in a MCExpr for constant integers.
void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) {
- EmitSLEB128Value(MCConstantExpr::Create(Value, getContext()), AddrSpace);
+ SmallString<32> Tmp;
+ raw_svector_ostream OSE(Tmp);
+ MCObjectWriter::EncodeSLEB128(Value, OSE);
+ EmitBytes(OSE.str(), AddrSpace);
+}
+
+void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size,
+ unsigned AddrSpace) {
+ if (getContext().getAsmInfo().hasAggressiveSymbolFolding()) {
+ EmitValue(Value, Size, AddrSpace);
+ return;
+ }
+ MCSymbol *ABS = getContext().CreateTempSymbol();
+ EmitAssignment(ABS, Value);
+ EmitSymbolValue(ABS, Size, AddrSpace);
+}
+
+
+void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
+ unsigned AddrSpace) {
+ EmitValueImpl(Value, Size, AddrSpace);
}
void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
- unsigned AddrSpace) {
- EmitValue(MCSymbolRefExpr::Create(Sym, getContext()), Size, AddrSpace);
+ unsigned AddrSpace) {
+ EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size,
+ AddrSpace);
}
void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
unsigned Column, unsigned Flags,
unsigned Isa,
- unsigned Discriminator) {
+ unsigned Discriminator,
+ StringRef FileName) {
getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
Discriminator);
}
-bool MCStreamer::EmitCFIStartProc() {
- return false;
+MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
+ if (FrameInfos.empty())
+ return NULL;
+ return &FrameInfos.back();
+}
+
+void MCStreamer::EnsureValidFrame() {
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ if (!CurFrame || CurFrame->End)
+ report_fatal_error("No open frame");
+}
+
+void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
+ MCSymbol *EHSymbol) {
+}
+
+void MCStreamer::EmitLabel(MCSymbol *Symbol) {
+ assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
+ assert(getCurrentSection() && "Cannot emit before setting section!");
+ Symbol->setSection(*getCurrentSection());
+
+ StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
+ if (!Symbol->getName().startswith(Prefix))
+ LastNonPrivate = Symbol;
+}
+
+void MCStreamer::EmitCFISections(bool EH, bool Debug) {
+ assert(EH || Debug);
+ EmitEHFrame = EH;
+ EmitDebugFrame = Debug;
+}
+
+void MCStreamer::EmitCFIStartProc() {
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ if (CurFrame && !CurFrame->End)
+ report_fatal_error("Starting a frame before finishing the previous one!");
+ MCDwarfFrameInfo Frame;
+ Frame.Begin = getContext().CreateTempSymbol();
+ Frame.Function = LastNonPrivate;
+ EmitLabel(Frame.Begin);
+ FrameInfos.push_back(Frame);
+}
+
+void MCStreamer::EmitCFIEndProc() {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->End = getContext().CreateTempSymbol();
+ EmitLabel(CurFrame->End);
+}
+
+void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MachineLocation Dest(MachineLocation::VirtualFP);
+ MachineLocation Source(Register, -Offset);
+ MCCFIInstruction Instruction(Label, Dest, Source);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MachineLocation Dest(MachineLocation::VirtualFP);
+ MachineLocation Source(MachineLocation::VirtualFP, -Offset);
+ MCCFIInstruction Instruction(Label, Dest, Source);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MachineLocation Dest(MachineLocation::VirtualFP);
+ MachineLocation Source(MachineLocation::VirtualFP, Adjustment);
+ MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MachineLocation Dest(Register);
+ MachineLocation Source(MachineLocation::VirtualFP);
+ MCCFIInstruction Instruction(Label, Dest, Source);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MachineLocation Dest(Register, Offset);
+ MachineLocation Source(Register, Offset);
+ MCCFIInstruction Instruction(Label, Dest, Source);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MachineLocation Dest(Register, Offset);
+ MachineLocation Source(Register, Offset);
+ MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
+ unsigned Encoding) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->Personality = Sym;
+ CurFrame->PersonalityEncoding = Encoding;
+}
+
+void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->Lsda = Sym;
+ CurFrame->LsdaEncoding = Encoding;
}
-bool MCStreamer::EmitCFIEndProc() {
- return false;
+void MCStreamer::EmitCFIRememberState() {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MCCFIInstruction Instruction(MCCFIInstruction::Remember, Label);
+ CurFrame->Instructions.push_back(Instruction);
}
-bool MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
- return false;
+void MCStreamer::EmitCFIRestoreState() {
+ // FIXME: Error if there is no matching cfi_remember_state.
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label);
+ CurFrame->Instructions.push_back(Instruction);
}
-bool MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
- return false;
+void MCStreamer::EmitCFISameValue(int64_t Register) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MCCFIInstruction Instruction(MCCFIInstruction::SameValue, Label, Register);
+ CurFrame->Instructions.push_back(Instruction);
}
-bool MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
- return false;
+void MCStreamer::EmitWin64EHFrame(MCSymbol *Symbol, MCSymbol *EHandler)
+{
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitWin64EHPushReg(int64_t Register)
+{
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitWin64EHSetFrame(int64_t Register, int64_t Offset)
+{
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitWin64EHAllocStack(int64_t Size)
+{
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitWin64EHSaveReg(int64_t Register, int64_t Offset)
+{
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitWin64EHPushFrame(bool Code)
+{
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitFnStart() {
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitFnEnd() {
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitCantUnwind() {
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitHandlerData() {
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
+ errs() << "Not implemented yet\n";
+ abort();
}
-bool MCStreamer::EmitCFIPersonality(const MCSymbol *Sym) {
- return false;
+void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitPad(int64_t Offset) {
+ errs() << "Not implemented yet\n";
+ abort();
}
-bool MCStreamer::EmitCFILsda(const MCSymbol *Sym) {
- return false;
+void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
+ errs() << "Not implemented yet\n";
+ abort();
}
/// EmitRawText - If this file is backed by an assembly streamer, this dumps
T.toVector(Str);
EmitRawText(Str.str());
}
+
+void MCStreamer::EmitFrames(bool usingCFI) {
+ if (!getNumFrameInfos())
+ return;
+
+ if (EmitEHFrame)
+ MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
+
+ if (EmitDebugFrame)
+ MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
+}
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