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ac42e994d0
This is to match the overloaded variants as well as the new style. Differential Revision: http://reviews.llvm.org/D20690 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271359 91177308-0d34-0410-b5e6-96231b3b80d8
809 lines
28 KiB
C++
809 lines
28 KiB
C++
//===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/MC/MCAsmBackend.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCInstPrinter.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/MC/MCObjectWriter.h"
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#include "llvm/MC/MCSection.h"
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#include "llvm/MC/MCSectionCOFF.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/MC/MCWin64EH.h"
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#include "llvm/Support/COFF.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/LEB128.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cstdlib>
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using namespace llvm;
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// Pin the vtables to this file.
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MCTargetStreamer::~MCTargetStreamer() {}
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MCTargetStreamer::MCTargetStreamer(MCStreamer &S) : Streamer(S) {
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S.setTargetStreamer(this);
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}
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void MCTargetStreamer::emitLabel(MCSymbol *Symbol) {}
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void MCTargetStreamer::finish() {}
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void MCTargetStreamer::emitAssignment(MCSymbol *Symbol, const MCExpr *Value) {}
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MCStreamer::MCStreamer(MCContext &Ctx)
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: Context(Ctx), CurrentWinFrameInfo(nullptr) {
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SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
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}
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MCStreamer::~MCStreamer() {
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for (unsigned i = 0; i < getNumWinFrameInfos(); ++i)
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delete WinFrameInfos[i];
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}
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void MCStreamer::reset() {
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DwarfFrameInfos.clear();
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for (unsigned i = 0; i < getNumWinFrameInfos(); ++i)
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delete WinFrameInfos[i];
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WinFrameInfos.clear();
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CurrentWinFrameInfo = nullptr;
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SymbolOrdering.clear();
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SectionStack.clear();
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SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
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}
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raw_ostream &MCStreamer::GetCommentOS() {
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// By default, discard comments.
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return nulls();
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}
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void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
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void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
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for (auto &FI : DwarfFrameInfos)
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FI.CompactUnwindEncoding =
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(MAB ? MAB->generateCompactUnwindEncoding(FI.Instructions) : 0);
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}
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/// EmitIntValue - Special case of EmitValue that avoids the client having to
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/// pass in a MCExpr for constant integers.
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void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
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assert(1 <= Size && Size <= 8 && "Invalid size");
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assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
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"Invalid size");
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char buf[8];
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const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
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for (unsigned i = 0; i != Size; ++i) {
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unsigned index = isLittleEndian ? i : (Size - i - 1);
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buf[i] = uint8_t(Value >> (index * 8));
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}
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EmitBytes(StringRef(buf, Size));
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}
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/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
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/// client having to pass in a MCExpr for constant integers.
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void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) {
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SmallString<128> Tmp;
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raw_svector_ostream OSE(Tmp);
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encodeULEB128(Value, OSE, Padding);
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EmitBytes(OSE.str());
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}
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/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
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/// client having to pass in a MCExpr for constant integers.
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void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
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SmallString<128> Tmp;
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raw_svector_ostream OSE(Tmp);
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encodeSLEB128(Value, OSE);
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EmitBytes(OSE.str());
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}
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void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size, SMLoc Loc) {
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EmitValueImpl(Value, Size, Loc);
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}
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void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
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bool IsSectionRelative) {
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assert((!IsSectionRelative || Size == 4) &&
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"SectionRelative value requires 4-bytes");
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if (!IsSectionRelative)
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EmitValueImpl(MCSymbolRefExpr::create(Sym, getContext()), Size);
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else
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EmitCOFFSecRel32(Sym);
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}
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void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
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report_fatal_error("unsupported directive in streamer");
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}
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void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
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report_fatal_error("unsupported directive in streamer");
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}
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/// Emit NumBytes bytes worth of the value specified by FillValue.
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/// This implements directives such as '.space'.
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void MCStreamer::emitFill(uint64_t NumBytes, uint8_t FillValue) {
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for (uint64_t i = 0, e = NumBytes; i != e; ++i)
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EmitIntValue(FillValue, 1);
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}
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void MCStreamer::emitFill(uint64_t NumValues, int64_t Size, int64_t Expr) {
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int64_t NonZeroSize = Size > 4 ? 4 : Size;
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Expr &= ~0ULL >> (64 - NonZeroSize * 8);
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for (uint64_t i = 0, e = NumValues; i != e; ++i) {
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EmitIntValue(Expr, NonZeroSize);
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if (NonZeroSize < Size)
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EmitIntValue(0, Size - NonZeroSize);
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}
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}
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/// The implementation in this class just redirects to emitFill.
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void MCStreamer::EmitZeros(uint64_t NumBytes) {
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emitFill(NumBytes, 0);
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}
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unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
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StringRef Directory,
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StringRef Filename, unsigned CUID) {
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return getContext().getDwarfFile(Directory, Filename, FileNo, CUID);
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}
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void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
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unsigned Column, unsigned Flags,
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unsigned Isa,
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unsigned Discriminator,
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StringRef FileName) {
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getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
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Discriminator);
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}
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MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) {
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MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
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if (!Table.getLabel()) {
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StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix();
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Table.setLabel(
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Context.getOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID)));
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}
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return Table.getLabel();
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}
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MCDwarfFrameInfo *MCStreamer::getCurrentDwarfFrameInfo() {
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if (DwarfFrameInfos.empty())
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return nullptr;
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return &DwarfFrameInfos.back();
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}
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bool MCStreamer::hasUnfinishedDwarfFrameInfo() {
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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return CurFrame && !CurFrame->End;
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}
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void MCStreamer::EnsureValidDwarfFrame() {
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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if (!CurFrame || CurFrame->End)
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report_fatal_error("No open frame");
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}
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unsigned MCStreamer::EmitCVFileDirective(unsigned FileNo, StringRef Filename) {
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return getContext().getCVFile(Filename, FileNo);
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}
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void MCStreamer::EmitCVLocDirective(unsigned FunctionId, unsigned FileNo,
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unsigned Line, unsigned Column,
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bool PrologueEnd, bool IsStmt,
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StringRef FileName) {
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getContext().setCurrentCVLoc(FunctionId, FileNo, Line, Column, PrologueEnd,
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IsStmt);
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}
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void MCStreamer::EmitCVLinetableDirective(unsigned FunctionId,
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const MCSymbol *Begin,
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const MCSymbol *End) {}
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void MCStreamer::EmitCVInlineLinetableDirective(
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unsigned PrimaryFunctionId, unsigned SourceFileId, unsigned SourceLineNum,
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const MCSymbol *FnStartSym, const MCSymbol *FnEndSym,
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ArrayRef<unsigned> SecondaryFunctionIds) {}
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void MCStreamer::EmitCVDefRangeDirective(
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ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
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StringRef FixedSizePortion) {}
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void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
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MCSymbol *EHSymbol) {
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}
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void MCStreamer::InitSections(bool NoExecStack) {
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SwitchSection(getContext().getObjectFileInfo()->getTextSection());
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}
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void MCStreamer::AssignFragment(MCSymbol *Symbol, MCFragment *Fragment) {
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assert(Fragment);
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Symbol->setFragment(Fragment);
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// As we emit symbols into a section, track the order so that they can
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// be sorted upon later. Zero is reserved to mean 'unemitted'.
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SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
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}
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void MCStreamer::EmitLabel(MCSymbol *Symbol) {
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assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
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assert(getCurrentSection().first && "Cannot emit before setting section!");
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assert(!Symbol->getFragment() && "Unexpected fragment on symbol data!");
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Symbol->setFragment(&getCurrentSectionOnly()->getDummyFragment());
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MCTargetStreamer *TS = getTargetStreamer();
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if (TS)
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TS->emitLabel(Symbol);
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}
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void MCStreamer::EmitCFISections(bool EH, bool Debug) {
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assert(EH || Debug);
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}
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void MCStreamer::EmitCFIStartProc(bool IsSimple) {
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if (hasUnfinishedDwarfFrameInfo())
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report_fatal_error("Starting a frame before finishing the previous one!");
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MCDwarfFrameInfo Frame;
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Frame.IsSimple = IsSimple;
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EmitCFIStartProcImpl(Frame);
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const MCAsmInfo* MAI = Context.getAsmInfo();
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if (MAI) {
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for (const MCCFIInstruction& Inst : MAI->getInitialFrameState()) {
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if (Inst.getOperation() == MCCFIInstruction::OpDefCfa ||
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Inst.getOperation() == MCCFIInstruction::OpDefCfaRegister) {
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Frame.CurrentCfaRegister = Inst.getRegister();
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}
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}
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}
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DwarfFrameInfos.push_back(Frame);
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}
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void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
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}
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void MCStreamer::EmitCFIEndProc() {
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EnsureValidDwarfFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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EmitCFIEndProcImpl(*CurFrame);
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}
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void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
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// Put a dummy non-null value in Frame.End to mark that this frame has been
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// closed.
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Frame.End = (MCSymbol *) 1;
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}
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MCSymbol *MCStreamer::EmitCFICommon() {
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EnsureValidDwarfFrame();
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MCSymbol *Label = getContext().createTempSymbol();
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EmitLabel(Label);
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return Label;
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}
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void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createDefCfa(Label, Register, Offset);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
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}
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void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createDefCfaOffset(Label, Offset);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createDefCfaRegister(Label, Register);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
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}
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void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createOffset(Label, Register, Offset);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createRelOffset(Label, Register, Offset);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
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unsigned Encoding) {
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EnsureValidDwarfFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Personality = Sym;
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CurFrame->PersonalityEncoding = Encoding;
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}
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void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
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EnsureValidDwarfFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Lsda = Sym;
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CurFrame->LsdaEncoding = Encoding;
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}
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void MCStreamer::EmitCFIRememberState() {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIRestoreState() {
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// FIXME: Error if there is no matching cfi_remember_state.
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFISameValue(int64_t Register) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createSameValue(Label, Register);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIRestore(int64_t Register) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createRestore(Label, Register);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIEscape(StringRef Values) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIGnuArgsSize(int64_t Size) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createGnuArgsSize(Label, Size);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFISignalFrame() {
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EnsureValidDwarfFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->IsSignalFrame = true;
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}
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void MCStreamer::EmitCFIUndefined(int64_t Register) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createUndefined(Label, Register);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createRegister(Label, Register1, Register2);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIWindowSave() {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createWindowSave(Label);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EnsureValidWinFrameInfo() {
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const MCAsmInfo *MAI = Context.getAsmInfo();
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if (!MAI->usesWindowsCFI())
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report_fatal_error(".seh_* directives are not supported on this target");
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if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End)
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report_fatal_error("No open Win64 EH frame function!");
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}
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void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) {
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const MCAsmInfo *MAI = Context.getAsmInfo();
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if (!MAI->usesWindowsCFI())
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report_fatal_error(".seh_* directives are not supported on this target");
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if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End)
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report_fatal_error("Starting a function before ending the previous one!");
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MCSymbol *StartProc = getContext().createTempSymbol();
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EmitLabel(StartProc);
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WinFrameInfos.push_back(new WinEH::FrameInfo(Symbol, StartProc));
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CurrentWinFrameInfo = WinFrameInfos.back();
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CurrentWinFrameInfo->TextSection = getCurrentSectionOnly();
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|
}
|
|
|
|
void MCStreamer::EmitWinCFIEndProc() {
|
|
EnsureValidWinFrameInfo();
|
|
if (CurrentWinFrameInfo->ChainedParent)
|
|
report_fatal_error("Not all chained regions terminated!");
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
CurrentWinFrameInfo->End = Label;
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIStartChained() {
|
|
EnsureValidWinFrameInfo();
|
|
|
|
MCSymbol *StartProc = getContext().createTempSymbol();
|
|
EmitLabel(StartProc);
|
|
|
|
WinFrameInfos.push_back(new WinEH::FrameInfo(CurrentWinFrameInfo->Function,
|
|
StartProc, CurrentWinFrameInfo));
|
|
CurrentWinFrameInfo = WinFrameInfos.back();
|
|
CurrentWinFrameInfo->TextSection = getCurrentSectionOnly();
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIEndChained() {
|
|
EnsureValidWinFrameInfo();
|
|
if (!CurrentWinFrameInfo->ChainedParent)
|
|
report_fatal_error("End of a chained region outside a chained region!");
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
CurrentWinFrameInfo->End = Label;
|
|
CurrentWinFrameInfo =
|
|
const_cast<WinEH::FrameInfo *>(CurrentWinFrameInfo->ChainedParent);
|
|
}
|
|
|
|
void MCStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind,
|
|
bool Except) {
|
|
EnsureValidWinFrameInfo();
|
|
if (CurrentWinFrameInfo->ChainedParent)
|
|
report_fatal_error("Chained unwind areas can't have handlers!");
|
|
CurrentWinFrameInfo->ExceptionHandler = Sym;
|
|
if (!Except && !Unwind)
|
|
report_fatal_error("Don't know what kind of handler this is!");
|
|
if (Unwind)
|
|
CurrentWinFrameInfo->HandlesUnwind = true;
|
|
if (Except)
|
|
CurrentWinFrameInfo->HandlesExceptions = true;
|
|
}
|
|
|
|
void MCStreamer::EmitWinEHHandlerData() {
|
|
EnsureValidWinFrameInfo();
|
|
if (CurrentWinFrameInfo->ChainedParent)
|
|
report_fatal_error("Chained unwind areas can't have handlers!");
|
|
}
|
|
|
|
static MCSection *getWinCFISection(MCContext &Context, unsigned *NextWinCFIID,
|
|
MCSection *MainCFISec,
|
|
const MCSection *TextSec) {
|
|
// If this is the main .text section, use the main unwind info section.
|
|
if (TextSec == Context.getObjectFileInfo()->getTextSection())
|
|
return MainCFISec;
|
|
|
|
const auto *TextSecCOFF = cast<MCSectionCOFF>(TextSec);
|
|
unsigned UniqueID = TextSecCOFF->getOrAssignWinCFISectionID(NextWinCFIID);
|
|
|
|
// If this section is COMDAT, this unwind section should be COMDAT associative
|
|
// with its group.
|
|
const MCSymbol *KeySym = nullptr;
|
|
if (TextSecCOFF->getCharacteristics() & COFF::IMAGE_SCN_LNK_COMDAT)
|
|
KeySym = TextSecCOFF->getCOMDATSymbol();
|
|
|
|
return Context.getAssociativeCOFFSection(cast<MCSectionCOFF>(MainCFISec),
|
|
KeySym, UniqueID);
|
|
}
|
|
|
|
MCSection *MCStreamer::getAssociatedPDataSection(const MCSection *TextSec) {
|
|
return getWinCFISection(getContext(), &NextWinCFIID,
|
|
getContext().getObjectFileInfo()->getPDataSection(),
|
|
TextSec);
|
|
}
|
|
|
|
MCSection *MCStreamer::getAssociatedXDataSection(const MCSection *TextSec) {
|
|
return getWinCFISection(getContext(), &NextWinCFIID,
|
|
getContext().getObjectFileInfo()->getXDataSection(),
|
|
TextSec);
|
|
}
|
|
|
|
void MCStreamer::EmitSyntaxDirective() {}
|
|
|
|
void MCStreamer::EmitWinCFIPushReg(unsigned Register) {
|
|
EnsureValidWinFrameInfo();
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
WinEH::Instruction Inst = Win64EH::Instruction::PushNonVol(Label, Register);
|
|
CurrentWinFrameInfo->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) {
|
|
EnsureValidWinFrameInfo();
|
|
if (CurrentWinFrameInfo->LastFrameInst >= 0)
|
|
report_fatal_error("Frame register and offset already specified!");
|
|
if (Offset & 0x0F)
|
|
report_fatal_error("Misaligned frame pointer offset!");
|
|
if (Offset > 240)
|
|
report_fatal_error("Frame offset must be less than or equal to 240!");
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
WinEH::Instruction Inst =
|
|
Win64EH::Instruction::SetFPReg(Label, Register, Offset);
|
|
CurrentWinFrameInfo->LastFrameInst = CurrentWinFrameInfo->Instructions.size();
|
|
CurrentWinFrameInfo->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIAllocStack(unsigned Size) {
|
|
EnsureValidWinFrameInfo();
|
|
if (Size == 0)
|
|
report_fatal_error("Allocation size must be non-zero!");
|
|
if (Size & 7)
|
|
report_fatal_error("Misaligned stack allocation!");
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
WinEH::Instruction Inst = Win64EH::Instruction::Alloc(Label, Size);
|
|
CurrentWinFrameInfo->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) {
|
|
EnsureValidWinFrameInfo();
|
|
if (Offset & 7)
|
|
report_fatal_error("Misaligned saved register offset!");
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
WinEH::Instruction Inst =
|
|
Win64EH::Instruction::SaveNonVol(Label, Register, Offset);
|
|
CurrentWinFrameInfo->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) {
|
|
EnsureValidWinFrameInfo();
|
|
if (Offset & 0x0F)
|
|
report_fatal_error("Misaligned saved vector register offset!");
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
WinEH::Instruction Inst =
|
|
Win64EH::Instruction::SaveXMM(Label, Register, Offset);
|
|
CurrentWinFrameInfo->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIPushFrame(bool Code) {
|
|
EnsureValidWinFrameInfo();
|
|
if (CurrentWinFrameInfo->Instructions.size() > 0)
|
|
report_fatal_error("If present, PushMachFrame must be the first UOP");
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
WinEH::Instruction Inst = Win64EH::Instruction::PushMachFrame(Label, Code);
|
|
CurrentWinFrameInfo->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIEndProlog() {
|
|
EnsureValidWinFrameInfo();
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
CurrentWinFrameInfo->PrologEnd = Label;
|
|
}
|
|
|
|
void MCStreamer::EmitCOFFSafeSEH(MCSymbol const *Symbol) {
|
|
}
|
|
|
|
void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
|
|
}
|
|
|
|
void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
|
|
}
|
|
|
|
/// EmitRawText - If this file is backed by an assembly streamer, this dumps
|
|
/// the specified string in the output .s file. This capability is
|
|
/// indicated by the hasRawTextSupport() predicate.
|
|
void MCStreamer::EmitRawTextImpl(StringRef String) {
|
|
errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
|
|
" something must not be fully mc'ized\n";
|
|
abort();
|
|
}
|
|
|
|
void MCStreamer::EmitRawText(const Twine &T) {
|
|
SmallString<128> Str;
|
|
EmitRawTextImpl(T.toStringRef(Str));
|
|
}
|
|
|
|
void MCStreamer::EmitWindowsUnwindTables() {
|
|
}
|
|
|
|
void MCStreamer::Finish() {
|
|
if (!DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End)
|
|
report_fatal_error("Unfinished frame!");
|
|
|
|
MCTargetStreamer *TS = getTargetStreamer();
|
|
if (TS)
|
|
TS->finish();
|
|
|
|
FinishImpl();
|
|
}
|
|
|
|
void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
|
|
visitUsedExpr(*Value);
|
|
Symbol->setVariableValue(Value);
|
|
|
|
MCTargetStreamer *TS = getTargetStreamer();
|
|
if (TS)
|
|
TS->emitAssignment(Symbol, Value);
|
|
}
|
|
|
|
void MCTargetStreamer::prettyPrintAsm(MCInstPrinter &InstPrinter, raw_ostream &OS,
|
|
const MCInst &Inst, const MCSubtargetInfo &STI) {
|
|
InstPrinter.printInst(&Inst, OS, "", STI);
|
|
}
|
|
|
|
void MCStreamer::visitUsedSymbol(const MCSymbol &Sym) {
|
|
}
|
|
|
|
void MCStreamer::visitUsedExpr(const MCExpr &Expr) {
|
|
switch (Expr.getKind()) {
|
|
case MCExpr::Target:
|
|
cast<MCTargetExpr>(Expr).visitUsedExpr(*this);
|
|
break;
|
|
|
|
case MCExpr::Constant:
|
|
break;
|
|
|
|
case MCExpr::Binary: {
|
|
const MCBinaryExpr &BE = cast<MCBinaryExpr>(Expr);
|
|
visitUsedExpr(*BE.getLHS());
|
|
visitUsedExpr(*BE.getRHS());
|
|
break;
|
|
}
|
|
|
|
case MCExpr::SymbolRef:
|
|
visitUsedSymbol(cast<MCSymbolRefExpr>(Expr).getSymbol());
|
|
break;
|
|
|
|
case MCExpr::Unary:
|
|
visitUsedExpr(*cast<MCUnaryExpr>(Expr).getSubExpr());
|
|
break;
|
|
}
|
|
}
|
|
|
|
void MCStreamer::EmitInstruction(const MCInst &Inst,
|
|
const MCSubtargetInfo &STI) {
|
|
// Scan for values.
|
|
for (unsigned i = Inst.getNumOperands(); i--;)
|
|
if (Inst.getOperand(i).isExpr())
|
|
visitUsedExpr(*Inst.getOperand(i).getExpr());
|
|
}
|
|
|
|
void MCStreamer::emitAbsoluteSymbolDiff(const MCSymbol *Hi, const MCSymbol *Lo,
|
|
unsigned Size) {
|
|
// Get the Hi-Lo expression.
|
|
const MCExpr *Diff =
|
|
MCBinaryExpr::createSub(MCSymbolRefExpr::create(Hi, Context),
|
|
MCSymbolRefExpr::create(Lo, Context), Context);
|
|
|
|
const MCAsmInfo *MAI = Context.getAsmInfo();
|
|
if (!MAI->doesSetDirectiveSuppressesReloc()) {
|
|
EmitValue(Diff, Size);
|
|
return;
|
|
}
|
|
|
|
// Otherwise, emit with .set (aka assignment).
|
|
MCSymbol *SetLabel = Context.createTempSymbol("set", true);
|
|
EmitAssignment(SetLabel, Diff);
|
|
EmitSymbolValue(SetLabel, Size);
|
|
}
|
|
|
|
void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {}
|
|
void MCStreamer::EmitThumbFunc(MCSymbol *Func) {}
|
|
void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
|
|
void MCStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
|
|
void MCStreamer::EndCOFFSymbolDef() {}
|
|
void MCStreamer::EmitFileDirective(StringRef Filename) {}
|
|
void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {}
|
|
void MCStreamer::EmitCOFFSymbolType(int Type) {}
|
|
void MCStreamer::emitELFSize(MCSymbolELF *Symbol, const MCExpr *Value) {}
|
|
void MCStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
|
|
unsigned ByteAlignment) {}
|
|
void MCStreamer::EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol,
|
|
uint64_t Size, unsigned ByteAlignment) {}
|
|
void MCStreamer::ChangeSection(MCSection *, const MCExpr *) {}
|
|
void MCStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {}
|
|
void MCStreamer::EmitBytes(StringRef Data) {}
|
|
void MCStreamer::EmitBinaryData(StringRef Data) { EmitBytes(Data); }
|
|
void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, SMLoc Loc) {
|
|
visitUsedExpr(*Value);
|
|
}
|
|
void MCStreamer::EmitULEB128Value(const MCExpr *Value) {}
|
|
void MCStreamer::EmitSLEB128Value(const MCExpr *Value) {}
|
|
void MCStreamer::emitFill(const MCExpr &NumBytes, uint64_t Value, SMLoc Loc) {}
|
|
void MCStreamer::emitFill(const MCExpr &NumValues, int64_t Size, int64_t Expr,
|
|
SMLoc Loc) {}
|
|
void MCStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
|
|
unsigned ValueSize,
|
|
unsigned MaxBytesToEmit) {}
|
|
void MCStreamer::EmitCodeAlignment(unsigned ByteAlignment,
|
|
unsigned MaxBytesToEmit) {}
|
|
void MCStreamer::emitValueToOffset(const MCExpr *Offset, unsigned char Value) {}
|
|
void MCStreamer::EmitBundleAlignMode(unsigned AlignPow2) {}
|
|
void MCStreamer::EmitBundleLock(bool AlignToEnd) {}
|
|
void MCStreamer::FinishImpl() {}
|
|
void MCStreamer::EmitBundleUnlock() {}
|
|
|
|
void MCStreamer::SwitchSection(MCSection *Section, const MCExpr *Subsection) {
|
|
assert(Section && "Cannot switch to a null section!");
|
|
MCSectionSubPair curSection = SectionStack.back().first;
|
|
SectionStack.back().second = curSection;
|
|
if (MCSectionSubPair(Section, Subsection) != curSection) {
|
|
ChangeSection(Section, Subsection);
|
|
SectionStack.back().first = MCSectionSubPair(Section, Subsection);
|
|
assert(!Section->hasEnded() && "Section already ended");
|
|
MCSymbol *Sym = Section->getBeginSymbol();
|
|
if (Sym && !Sym->isInSection())
|
|
EmitLabel(Sym);
|
|
}
|
|
}
|
|
|
|
MCSymbol *MCStreamer::endSection(MCSection *Section) {
|
|
// TODO: keep track of the last subsection so that this symbol appears in the
|
|
// correct place.
|
|
MCSymbol *Sym = Section->getEndSymbol(Context);
|
|
if (Sym->isInSection())
|
|
return Sym;
|
|
|
|
SwitchSection(Section);
|
|
EmitLabel(Sym);
|
|
return Sym;
|
|
}
|