mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 20:23:11 +01:00
0561b945b9
Summary:
We are using symbols to represent label and csect interchangeably before, and that could be a problem.
There are cases we would need to add storage mapping class to the symbol if that symbol is actually the name of a csect, but it's hard for us to figure out whether that symbol is a label or csect.
This patch intend to do the following:
1. Construct a QualName (A name include the storage mapping class)
MCSymbolXCOFF for every MCSectionXCOFF.
2. Keep a pointer to that QualName inside of MCSectionXCOFF.
3. Use that QualName whenever we need a symbol refers to that
MCSectionXCOFF.
4. Adapt the snowball effect from the above changes in
XCOFFObjectWriter.cpp.
Reviewers: xingxue, DiggerLin, sfertile, daltenty, hubert.reinterpretcast
Reviewed By: DiggerLin, daltenty
Subscribers: wuzish, nemanjai, mgorny, hiraditya, kbarton, jsji, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D69633
1166 lines
40 KiB
C++
1166 lines
40 KiB
C++
//===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/BinaryFormat/COFF.h"
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#include "llvm/DebugInfo/CodeView/SymbolRecord.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/MCCodeView.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCDwarf.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/MCRegister.h"
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#include "llvm/MC/MCRegisterInfo.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/MC/MCWinEH.h"
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#include "llvm/Support/Casting.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/MathExtras.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cassert>
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#include <cstdint>
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#include <cstdlib>
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#include <utility>
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using namespace llvm;
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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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// Pin the vtables to this file.
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MCTargetStreamer::~MCTargetStreamer() = default;
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void MCTargetStreamer::emitLabel(MCSymbol *Symbol) {}
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void MCTargetStreamer::finish() {}
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void MCTargetStreamer::changeSection(const MCSection *CurSection,
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MCSection *Section,
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const MCExpr *Subsection,
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raw_ostream &OS) {
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Section->PrintSwitchToSection(
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*Streamer.getContext().getAsmInfo(),
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Streamer.getContext().getObjectFileInfo()->getTargetTriple(), OS,
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Subsection);
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}
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void MCTargetStreamer::emitDwarfFileDirective(StringRef Directive) {
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Streamer.EmitRawText(Directive);
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}
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void MCTargetStreamer::emitValue(const MCExpr *Value) {
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SmallString<128> Str;
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raw_svector_ostream OS(Str);
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Value->print(OS, Streamer.getContext().getAsmInfo());
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Streamer.EmitRawText(OS.str());
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}
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void MCTargetStreamer::emitRawBytes(StringRef Data) {
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const MCAsmInfo *MAI = Streamer.getContext().getAsmInfo();
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const char *Directive = MAI->getData8bitsDirective();
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for (const unsigned char C : Data.bytes()) {
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SmallString<128> Str;
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raw_svector_ostream OS(Str);
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OS << Directive << (unsigned)C;
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Streamer.EmitRawText(OS.str());
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}
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}
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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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UseAssemblerInfoForParsing(false) {
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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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void MCStreamer::reset() {
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DwarfFrameInfos.clear();
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CurrentWinFrameInfo = nullptr;
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WinFrameInfos.clear();
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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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unsigned MCStreamer::getNumFrameInfos() { return DwarfFrameInfos.size(); }
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ArrayRef<MCDwarfFrameInfo> MCStreamer::getDwarfFrameInfos() const {
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return DwarfFrameInfos;
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}
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void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
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void MCStreamer::addExplicitComment(const Twine &T) {}
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void MCStreamer::emitExplicitComments() {}
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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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/// EmitULEB128IntValue - 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 PadTo) {
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SmallString<128> Tmp;
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raw_svector_ostream OSE(Tmp);
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encodeULEB128(Value, OSE, PadTo);
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EmitBytes(OSE.str());
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}
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/// EmitSLEB128IntValue - 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, /*Offset=*/0);
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}
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void MCStreamer::EmitDTPRel64Value(const MCExpr *Value) {
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report_fatal_error("unsupported directive in streamer");
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}
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void MCStreamer::EmitDTPRel32Value(const MCExpr *Value) {
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report_fatal_error("unsupported directive in streamer");
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}
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void MCStreamer::EmitTPRel64Value(const MCExpr *Value) {
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report_fatal_error("unsupported directive in streamer");
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}
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void MCStreamer::EmitTPRel32Value(const MCExpr *Value) {
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report_fatal_error("unsupported directive in streamer");
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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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emitFill(*MCConstantExpr::create(NumBytes, getContext()), FillValue);
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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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Expected<unsigned>
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MCStreamer::tryEmitDwarfFileDirective(unsigned FileNo, StringRef Directory,
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StringRef Filename,
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Optional<MD5::MD5Result> Checksum,
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Optional<StringRef> Source,
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unsigned CUID) {
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return getContext().getDwarfFile(Directory, Filename, FileNo, Checksum,
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Source, CUID);
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}
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void MCStreamer::emitDwarfFile0Directive(StringRef Directory,
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StringRef Filename,
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Optional<MD5::MD5Result> Checksum,
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Optional<StringRef> Source,
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unsigned CUID) {
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getContext().setMCLineTableRootFile(CUID, Directory, Filename, Checksum,
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Source);
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}
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void MCStreamer::EmitCFIBKeyFrame() {
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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if (!CurFrame)
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return;
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CurFrame->IsBKeyFrame = true;
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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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bool MCStreamer::hasUnfinishedDwarfFrameInfo() {
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return !DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End;
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}
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MCDwarfFrameInfo *MCStreamer::getCurrentDwarfFrameInfo() {
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if (!hasUnfinishedDwarfFrameInfo()) {
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getContext().reportError(SMLoc(), "this directive must appear between "
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".cfi_startproc and .cfi_endproc "
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"directives");
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return nullptr;
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}
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return &DwarfFrameInfos.back();
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}
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bool MCStreamer::EmitCVFileDirective(unsigned FileNo, StringRef Filename,
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ArrayRef<uint8_t> Checksum,
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unsigned ChecksumKind) {
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return getContext().getCVContext().addFile(*this, FileNo, Filename, Checksum,
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ChecksumKind);
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}
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bool MCStreamer::EmitCVFuncIdDirective(unsigned FunctionId) {
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return getContext().getCVContext().recordFunctionId(FunctionId);
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}
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bool MCStreamer::EmitCVInlineSiteIdDirective(unsigned FunctionId,
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unsigned IAFunc, unsigned IAFile,
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unsigned IALine, unsigned IACol,
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SMLoc Loc) {
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if (getContext().getCVContext().getCVFunctionInfo(IAFunc) == nullptr) {
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getContext().reportError(Loc, "parent function id not introduced by "
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".cv_func_id or .cv_inline_site_id");
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return true;
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}
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return getContext().getCVContext().recordInlinedCallSiteId(
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FunctionId, IAFunc, IAFile, IALine, IACol);
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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, SMLoc Loc) {}
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bool MCStreamer::checkCVLocSection(unsigned FuncId, unsigned FileNo,
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SMLoc Loc) {
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CodeViewContext &CVC = getContext().getCVContext();
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MCCVFunctionInfo *FI = CVC.getCVFunctionInfo(FuncId);
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if (!FI) {
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getContext().reportError(
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Loc, "function id not introduced by .cv_func_id or .cv_inline_site_id");
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return false;
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}
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// Track the section
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if (FI->Section == nullptr)
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FI->Section = getCurrentSectionOnly();
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else if (FI->Section != getCurrentSectionOnly()) {
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getContext().reportError(
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Loc,
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"all .cv_loc directives for a function must be in the same section");
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return false;
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}
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return true;
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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(unsigned PrimaryFunctionId,
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unsigned SourceFileId,
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unsigned SourceLineNum,
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const MCSymbol *FnStartSym,
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const MCSymbol *FnEndSym) {}
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/// Only call this on endian-specific types like ulittle16_t and little32_t, or
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/// structs composed of them.
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template <typename T>
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static void copyBytesForDefRange(SmallString<20> &BytePrefix,
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codeview::SymbolKind SymKind,
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const T &DefRangeHeader) {
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BytePrefix.resize(2 + sizeof(T));
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codeview::ulittle16_t SymKindLE = codeview::ulittle16_t(SymKind);
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memcpy(&BytePrefix[0], &SymKindLE, 2);
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memcpy(&BytePrefix[2], &DefRangeHeader, sizeof(T));
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}
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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::EmitCVDefRangeDirective(
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ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
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codeview::DefRangeRegisterRelHeader DRHdr) {
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SmallString<20> BytePrefix;
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copyBytesForDefRange(BytePrefix, codeview::S_DEFRANGE_REGISTER_REL, DRHdr);
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EmitCVDefRangeDirective(Ranges, BytePrefix);
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}
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void MCStreamer::EmitCVDefRangeDirective(
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ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
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codeview::DefRangeSubfieldRegisterHeader DRHdr) {
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SmallString<20> BytePrefix;
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copyBytesForDefRange(BytePrefix, codeview::S_DEFRANGE_SUBFIELD_REGISTER,
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DRHdr);
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EmitCVDefRangeDirective(Ranges, BytePrefix);
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}
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void MCStreamer::EmitCVDefRangeDirective(
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ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
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codeview::DefRangeRegisterHeader DRHdr) {
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SmallString<20> BytePrefix;
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copyBytesForDefRange(BytePrefix, codeview::S_DEFRANGE_REGISTER, DRHdr);
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EmitCVDefRangeDirective(Ranges, BytePrefix);
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}
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void MCStreamer::EmitCVDefRangeDirective(
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ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
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codeview::DefRangeFramePointerRelHeader DRHdr) {
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SmallString<20> BytePrefix;
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copyBytesForDefRange(BytePrefix, codeview::S_DEFRANGE_FRAMEPOINTER_REL,
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DRHdr);
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EmitCVDefRangeDirective(Ranges, BytePrefix);
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}
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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, SMLoc Loc) {
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Symbol->redefineIfPossible();
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if (!Symbol->isUndefined() || Symbol->isVariable())
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return getContext().reportError(Loc, "invalid symbol redefinition");
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assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
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assert(getCurrentSectionOnly() && "Cannot emit before setting section!");
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assert(!Symbol->getFragment() && "Unexpected fragment on symbol data!");
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assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
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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, SMLoc Loc) {
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if (hasUnfinishedDwarfFrameInfo())
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return getContext().reportError(
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Loc, "starting new .cfi 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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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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if (!CurFrame)
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return;
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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::EmitCFILabel() {
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// Return a dummy non-null value so that label fields appear filled in when
|
|
// generating textual assembly.
|
|
return (MCSymbol *)1;
|
|
}
|
|
|
|
void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction =
|
|
MCCFIInstruction::createDefCfa(Label, Register, Offset);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
|
|
}
|
|
|
|
void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction =
|
|
MCCFIInstruction::createDefCfaOffset(Label, Offset);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction =
|
|
MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction =
|
|
MCCFIInstruction::createDefCfaRegister(Label, Register);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
|
|
}
|
|
|
|
void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction =
|
|
MCCFIInstruction::createOffset(Label, Register, Offset);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction =
|
|
MCCFIInstruction::createRelOffset(Label, Register, Offset);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
|
|
unsigned Encoding) {
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Personality = Sym;
|
|
CurFrame->PersonalityEncoding = Encoding;
|
|
}
|
|
|
|
void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Lsda = Sym;
|
|
CurFrame->LsdaEncoding = Encoding;
|
|
}
|
|
|
|
void MCStreamer::EmitCFIRememberState() {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFIRestoreState() {
|
|
// FIXME: Error if there is no matching cfi_remember_state.
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFISameValue(int64_t Register) {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction =
|
|
MCCFIInstruction::createSameValue(Label, Register);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFIRestore(int64_t Register) {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction =
|
|
MCCFIInstruction::createRestore(Label, Register);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFIEscape(StringRef Values) {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFIGnuArgsSize(int64_t Size) {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction =
|
|
MCCFIInstruction::createGnuArgsSize(Label, Size);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFISignalFrame() {
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->IsSignalFrame = true;
|
|
}
|
|
|
|
void MCStreamer::EmitCFIUndefined(int64_t Register) {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction =
|
|
MCCFIInstruction::createUndefined(Label, Register);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction =
|
|
MCCFIInstruction::createRegister(Label, Register1, Register2);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFIWindowSave() {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction =
|
|
MCCFIInstruction::createWindowSave(Label);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFINegateRAState() {
|
|
MCSymbol *Label = EmitCFILabel();
|
|
MCCFIInstruction Instruction = MCCFIInstruction::createNegateRAState(Label);
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
}
|
|
|
|
void MCStreamer::EmitCFIReturnColumn(int64_t Register) {
|
|
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
|
|
if (!CurFrame)
|
|
return;
|
|
CurFrame->RAReg = Register;
|
|
}
|
|
|
|
WinEH::FrameInfo *MCStreamer::EnsureValidWinFrameInfo(SMLoc Loc) {
|
|
const MCAsmInfo *MAI = Context.getAsmInfo();
|
|
if (!MAI->usesWindowsCFI()) {
|
|
getContext().reportError(
|
|
Loc, ".seh_* directives are not supported on this target");
|
|
return nullptr;
|
|
}
|
|
if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End) {
|
|
getContext().reportError(
|
|
Loc, ".seh_ directive must appear within an active frame");
|
|
return nullptr;
|
|
}
|
|
return CurrentWinFrameInfo;
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol, SMLoc Loc) {
|
|
const MCAsmInfo *MAI = Context.getAsmInfo();
|
|
if (!MAI->usesWindowsCFI())
|
|
return getContext().reportError(
|
|
Loc, ".seh_* directives are not supported on this target");
|
|
if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End)
|
|
getContext().reportError(
|
|
Loc, "Starting a function before ending the previous one!");
|
|
|
|
MCSymbol *StartProc = EmitCFILabel();
|
|
|
|
WinFrameInfos.emplace_back(
|
|
std::make_unique<WinEH::FrameInfo>(Symbol, StartProc));
|
|
CurrentWinFrameInfo = WinFrameInfos.back().get();
|
|
CurrentWinFrameInfo->TextSection = getCurrentSectionOnly();
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIEndProc(SMLoc Loc) {
|
|
WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
|
|
if (!CurFrame)
|
|
return;
|
|
if (CurFrame->ChainedParent)
|
|
getContext().reportError(Loc, "Not all chained regions terminated!");
|
|
|
|
MCSymbol *Label = EmitCFILabel();
|
|
CurFrame->End = Label;
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIFuncletOrFuncEnd(SMLoc Loc) {
|
|
WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
|
|
if (!CurFrame)
|
|
return;
|
|
if (CurFrame->ChainedParent)
|
|
getContext().reportError(Loc, "Not all chained regions terminated!");
|
|
|
|
MCSymbol *Label = EmitCFILabel();
|
|
CurFrame->FuncletOrFuncEnd = Label;
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIStartChained(SMLoc Loc) {
|
|
WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
|
|
if (!CurFrame)
|
|
return;
|
|
|
|
MCSymbol *StartProc = EmitCFILabel();
|
|
|
|
WinFrameInfos.emplace_back(std::make_unique<WinEH::FrameInfo>(
|
|
CurFrame->Function, StartProc, CurFrame));
|
|
CurrentWinFrameInfo = WinFrameInfos.back().get();
|
|
CurrentWinFrameInfo->TextSection = getCurrentSectionOnly();
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIEndChained(SMLoc Loc) {
|
|
WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
|
|
if (!CurFrame)
|
|
return;
|
|
if (!CurFrame->ChainedParent)
|
|
return getContext().reportError(
|
|
Loc, "End of a chained region outside a chained region!");
|
|
|
|
MCSymbol *Label = EmitCFILabel();
|
|
|
|
CurFrame->End = Label;
|
|
CurrentWinFrameInfo = const_cast<WinEH::FrameInfo *>(CurFrame->ChainedParent);
|
|
}
|
|
|
|
void MCStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, bool Except,
|
|
SMLoc Loc) {
|
|
WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
|
|
if (!CurFrame)
|
|
return;
|
|
if (CurFrame->ChainedParent)
|
|
return getContext().reportError(
|
|
Loc, "Chained unwind areas can't have handlers!");
|
|
CurFrame->ExceptionHandler = Sym;
|
|
if (!Except && !Unwind)
|
|
getContext().reportError(Loc, "Don't know what kind of handler this is!");
|
|
if (Unwind)
|
|
CurFrame->HandlesUnwind = true;
|
|
if (Except)
|
|
CurFrame->HandlesExceptions = true;
|
|
}
|
|
|
|
void MCStreamer::EmitWinEHHandlerData(SMLoc Loc) {
|
|
WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
|
|
if (!CurFrame)
|
|
return;
|
|
if (CurFrame->ChainedParent)
|
|
getContext().reportError(Loc, "Chained unwind areas can't have handlers!");
|
|
}
|
|
|
|
void MCStreamer::emitCGProfileEntry(const MCSymbolRefExpr *From,
|
|
const MCSymbolRefExpr *To, uint64_t Count) {
|
|
}
|
|
|
|
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);
|
|
auto *MainCFISecCOFF = cast<MCSectionCOFF>(MainCFISec);
|
|
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();
|
|
|
|
// In a GNU environment, we can't use associative comdats. Instead, do what
|
|
// GCC does, which is to make plain comdat selectany section named like
|
|
// ".[px]data$_Z3foov".
|
|
if (!Context.getAsmInfo()->hasCOFFAssociativeComdats()) {
|
|
std::string SectionName =
|
|
(MainCFISecCOFF->getSectionName() + "$" +
|
|
TextSecCOFF->getSectionName().split('$').second)
|
|
.str();
|
|
return Context.getCOFFSection(
|
|
SectionName,
|
|
MainCFISecCOFF->getCharacteristics() | COFF::IMAGE_SCN_LNK_COMDAT,
|
|
MainCFISecCOFF->getKind(), "", COFF::IMAGE_COMDAT_SELECT_ANY);
|
|
}
|
|
}
|
|
|
|
return Context.getAssociativeCOFFSection(MainCFISecCOFF, 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() {}
|
|
|
|
static unsigned encodeSEHRegNum(MCContext &Ctx, MCRegister Reg) {
|
|
return Ctx.getRegisterInfo()->getSEHRegNum(Reg);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIPushReg(MCRegister Register, SMLoc Loc) {
|
|
WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
|
|
if (!CurFrame)
|
|
return;
|
|
|
|
MCSymbol *Label = EmitCFILabel();
|
|
|
|
WinEH::Instruction Inst = Win64EH::Instruction::PushNonVol(
|
|
Label, encodeSEHRegNum(Context, Register));
|
|
CurFrame->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFISetFrame(MCRegister Register, unsigned Offset,
|
|
SMLoc Loc) {
|
|
WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
|
|
if (!CurFrame)
|
|
return;
|
|
if (CurFrame->LastFrameInst >= 0)
|
|
return getContext().reportError(
|
|
Loc, "frame register and offset can be set at most once");
|
|
if (Offset & 0x0F)
|
|
return getContext().reportError(Loc, "offset is not a multiple of 16");
|
|
if (Offset > 240)
|
|
return getContext().reportError(
|
|
Loc, "frame offset must be less than or equal to 240");
|
|
|
|
MCSymbol *Label = EmitCFILabel();
|
|
|
|
WinEH::Instruction Inst = Win64EH::Instruction::SetFPReg(
|
|
Label, encodeSEHRegNum(getContext(), Register), Offset);
|
|
CurFrame->LastFrameInst = CurFrame->Instructions.size();
|
|
CurFrame->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIAllocStack(unsigned Size, SMLoc Loc) {
|
|
WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
|
|
if (!CurFrame)
|
|
return;
|
|
if (Size == 0)
|
|
return getContext().reportError(Loc,
|
|
"stack allocation size must be non-zero");
|
|
if (Size & 7)
|
|
return getContext().reportError(
|
|
Loc, "stack allocation size is not a multiple of 8");
|
|
|
|
MCSymbol *Label = EmitCFILabel();
|
|
|
|
WinEH::Instruction Inst = Win64EH::Instruction::Alloc(Label, Size);
|
|
CurFrame->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFISaveReg(MCRegister Register, unsigned Offset,
|
|
SMLoc Loc) {
|
|
WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
|
|
if (!CurFrame)
|
|
return;
|
|
|
|
if (Offset & 7)
|
|
return getContext().reportError(
|
|
Loc, "register save offset is not 8 byte aligned");
|
|
|
|
MCSymbol *Label = EmitCFILabel();
|
|
|
|
WinEH::Instruction Inst = Win64EH::Instruction::SaveNonVol(
|
|
Label, encodeSEHRegNum(Context, Register), Offset);
|
|
CurFrame->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFISaveXMM(MCRegister Register, unsigned Offset,
|
|
SMLoc Loc) {
|
|
WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
|
|
if (!CurFrame)
|
|
return;
|
|
if (Offset & 0x0F)
|
|
return getContext().reportError(Loc, "offset is not a multiple of 16");
|
|
|
|
MCSymbol *Label = EmitCFILabel();
|
|
|
|
WinEH::Instruction Inst = Win64EH::Instruction::SaveXMM(
|
|
Label, encodeSEHRegNum(Context, Register), Offset);
|
|
CurFrame->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIPushFrame(bool Code, SMLoc Loc) {
|
|
WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
|
|
if (!CurFrame)
|
|
return;
|
|
if (!CurFrame->Instructions.empty())
|
|
return getContext().reportError(
|
|
Loc, "If present, PushMachFrame must be the first UOP");
|
|
|
|
MCSymbol *Label = EmitCFILabel();
|
|
|
|
WinEH::Instruction Inst = Win64EH::Instruction::PushMachFrame(Label, Code);
|
|
CurFrame->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIEndProlog(SMLoc Loc) {
|
|
WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
|
|
if (!CurFrame)
|
|
return;
|
|
|
|
MCSymbol *Label = EmitCFILabel();
|
|
|
|
CurFrame->PrologEnd = Label;
|
|
}
|
|
|
|
void MCStreamer::EmitCOFFSafeSEH(MCSymbol const *Symbol) {}
|
|
|
|
void MCStreamer::EmitCOFFSymbolIndex(MCSymbol const *Symbol) {}
|
|
|
|
void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {}
|
|
|
|
void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol, uint64_t Offset) {}
|
|
|
|
void MCStreamer::EmitCOFFImgRel32(MCSymbol const *Symbol, int64_t Offset) {}
|
|
|
|
/// 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) {
|
|
// This is not llvm_unreachable for the sake of out of tree backend
|
|
// developers who may not have assembly streamers and should serve as a
|
|
// reminder to not accidentally call EmitRawText in the absence of such.
|
|
report_fatal_error("EmitRawText called on an MCStreamer that doesn't support "
|
|
"it (target backend is likely missing an AsmStreamer "
|
|
"implementation)");
|
|
}
|
|
|
|
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) ||
|
|
(!WinFrameInfos.empty() && !WinFrameInfos.back()->End)) {
|
|
getContext().reportError(SMLoc(), "Unfinished frame!");
|
|
return;
|
|
}
|
|
|
|
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 &) {
|
|
// 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->doesSetDirectiveSuppressReloc()) {
|
|
EmitValue(Diff, Size);
|
|
return;
|
|
}
|
|
|
|
// Otherwise, emit with .set (aka assignment).
|
|
MCSymbol *SetLabel = Context.createTempSymbol("set", true);
|
|
EmitAssignment(SetLabel, Diff);
|
|
EmitSymbolValue(SetLabel, Size);
|
|
}
|
|
|
|
void MCStreamer::emitAbsoluteSymbolDiffAsULEB128(const MCSymbol *Hi,
|
|
const MCSymbol *Lo) {
|
|
// Get the Hi-Lo expression.
|
|
const MCExpr *Diff =
|
|
MCBinaryExpr::createSub(MCSymbolRefExpr::create(Hi, Context),
|
|
MCSymbolRefExpr::create(Lo, Context), Context);
|
|
|
|
EmitULEB128Value(Diff);
|
|
}
|
|
|
|
void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {}
|
|
void MCStreamer::EmitThumbFunc(MCSymbol *Func) {}
|
|
void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
|
|
void MCStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {
|
|
llvm_unreachable("this directive only supported on COFF targets");
|
|
}
|
|
void MCStreamer::EndCOFFSymbolDef() {
|
|
llvm_unreachable("this directive only supported on COFF targets");
|
|
}
|
|
void MCStreamer::EmitFileDirective(StringRef Filename) {}
|
|
void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {
|
|
llvm_unreachable("this directive only supported on COFF targets");
|
|
}
|
|
void MCStreamer::EmitCOFFSymbolType(int Type) {
|
|
llvm_unreachable("this directive only supported on COFF targets");
|
|
}
|
|
void MCStreamer::EmitXCOFFLocalCommonSymbol(MCSymbol *LabelSym, uint64_t Size,
|
|
MCSymbol *CsectSym,
|
|
unsigned ByteAlign) {
|
|
llvm_unreachable("this directive only supported on XCOFF targets");
|
|
}
|
|
void MCStreamer::emitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
|
|
void MCStreamer::emitELFSymverDirective(StringRef AliasName,
|
|
const MCSymbol *Aliasee) {}
|
|
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,
|
|
SMLoc Loc) {}
|
|
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;
|
|
}
|
|
|
|
void MCStreamer::EmitVersionForTarget(const Triple &Target,
|
|
const VersionTuple &SDKVersion) {
|
|
if (!Target.isOSBinFormatMachO() || !Target.isOSDarwin())
|
|
return;
|
|
// Do we even know the version?
|
|
if (Target.getOSMajorVersion() == 0)
|
|
return;
|
|
|
|
unsigned Major;
|
|
unsigned Minor;
|
|
unsigned Update;
|
|
if (Target.isMacCatalystEnvironment()) {
|
|
// Mac Catalyst always uses the build version load command.
|
|
Target.getiOSVersion(Major, Minor, Update);
|
|
assert(Major && "A non-zero major version is expected");
|
|
EmitBuildVersion(MachO::PLATFORM_MACCATALYST, Major, Minor, Update,
|
|
SDKVersion);
|
|
return;
|
|
}
|
|
|
|
MCVersionMinType VersionType;
|
|
if (Target.isWatchOS()) {
|
|
VersionType = MCVM_WatchOSVersionMin;
|
|
Target.getWatchOSVersion(Major, Minor, Update);
|
|
} else if (Target.isTvOS()) {
|
|
VersionType = MCVM_TvOSVersionMin;
|
|
Target.getiOSVersion(Major, Minor, Update);
|
|
} else if (Target.isMacOSX()) {
|
|
VersionType = MCVM_OSXVersionMin;
|
|
if (!Target.getMacOSXVersion(Major, Minor, Update))
|
|
Major = 0;
|
|
} else {
|
|
VersionType = MCVM_IOSVersionMin;
|
|
Target.getiOSVersion(Major, Minor, Update);
|
|
}
|
|
if (Major != 0)
|
|
EmitVersionMin(VersionType, Major, Minor, Update, SDKVersion);
|
|
}
|