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148c7f286c
This patch restores the ARM mode if the user's inline assembly
does not. In the object streamer, it ensures that instructions
following the inline assembly are encoded correctly and that
correct mapping symbols are emitted. For the asm streamer, it
emits a .arm or .thumb directive.
This patch does not ensure that the inline assembly contains
the ADR instruction to switch modes at runtime.
The problem we need to solve is code like this:
int foo(int a, int b) {
int r = a + b;
asm volatile(
".align 2 \n"
".arm \n"
"add r0,r0,r0 \n"
: : "r"(r));
return r+1;
}
If we compile this function in thumb mode then the inline assembly
will switch to arm mode. We need to make sure that we switch back to
thumb mode after emitting the inline assembly or we will incorrectly
encode the instructions that follow (i.e. the assembly instructions
for return r+1).
Based on patch by David Peixotto
Change-Id: Ib57f6d2d78a22afad5de8693fba6230ff56ba48b
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199818 91177308-0d34-0410-b5e6-96231b3b80d8
626 lines
21 KiB
C++
626 lines
21 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/MCObjectWriter.h"
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#include "llvm/MC/MCSymbol.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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void MCTargetStreamer::emitLabel(MCSymbol *Symbol) {}
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MCStreamer::MCStreamer(MCContext &Ctx, MCTargetStreamer *TargetStreamer)
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: Context(Ctx), TargetStreamer(TargetStreamer), EmitEHFrame(true),
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EmitDebugFrame(false), CurrentW64UnwindInfo(0), LastSymbol(0),
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AutoInitSections(false) {
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SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
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if (TargetStreamer)
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TargetStreamer->setStreamer(this);
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}
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MCStreamer::~MCStreamer() {
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for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
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delete W64UnwindInfos[i];
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}
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void MCStreamer::reset() {
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for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
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delete W64UnwindInfos[i];
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W64UnwindInfos.clear();
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EmitEHFrame = true;
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EmitDebugFrame = false;
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CurrentW64UnwindInfo = 0;
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LastSymbol = 0;
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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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const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
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const MCSymbol *A,
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const MCSymbol *B) {
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MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
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const MCExpr *ARef =
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MCSymbolRefExpr::Create(A, Variant, Context);
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const MCExpr *BRef =
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MCSymbolRefExpr::Create(B, Variant, Context);
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const MCExpr *AddrDelta =
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MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
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return AddrDelta;
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}
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const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
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if (Context.getAsmInfo()->hasAggressiveSymbolFolding() ||
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isa<MCSymbolRefExpr>(Expr))
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return Expr;
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MCSymbol *ABS = Context.CreateTempSymbol();
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EmitAssignment(ABS, Expr);
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return MCSymbolRefExpr::Create(ABS, Context);
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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 (std::vector<MCDwarfFrameInfo>::iterator I = FrameInfos.begin(),
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E = FrameInfos.end(); I != E; ++I)
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I->CompactUnwindEncoding =
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(MAB ? MAB->generateCompactUnwindEncoding(I->Instructions) : 0);
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}
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void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
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const MCSymbol *Label, int PointerSize) {
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// emit the sequence to set the address
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EmitIntValue(dwarf::DW_LNS_extended_op, 1);
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EmitULEB128IntValue(PointerSize + 1);
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EmitIntValue(dwarf::DW_LNE_set_address, 1);
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EmitSymbolValue(Label, PointerSize);
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// emit the sequence for the LineDelta (from 1) and a zero address delta.
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MCDwarfLineAddr::Emit(this, LineDelta, 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(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::EmitAbsValue(const MCExpr *Value, unsigned Size) {
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const MCExpr *ABS = ForceExpAbs(Value);
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EmitValue(ABS, Size);
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}
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void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size) {
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EmitValueImpl(Value, Size);
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}
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void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size) {
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EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
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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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/// EmitFill - Emit NumBytes bytes worth of the value specified by
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/// FillValue. This implements directives such as '.space'.
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void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
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const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
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for (uint64_t i = 0, e = NumBytes; i != e; ++i)
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EmitValue(E, 1);
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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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bool 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) == 0;
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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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MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
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if (FrameInfos.empty())
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return 0;
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return &FrameInfos.back();
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}
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void MCStreamer::EnsureValidFrame() {
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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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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void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
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MCSymbol *EHSymbol) {
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}
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void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) {
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if (Section)
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Symbol->setSection(*Section);
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else
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Symbol->setUndefined();
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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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AssignSection(Symbol, getCurrentSection().first);
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LastSymbol = Symbol;
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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::EmitDebugLabel(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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AssignSection(Symbol, getCurrentSection().first);
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LastSymbol = Symbol;
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}
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void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
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EnsureValidFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
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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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EmitEHFrame = EH;
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EmitDebugFrame = Debug;
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}
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void MCStreamer::EmitCFIStartProc() {
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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if (CurFrame && !CurFrame->End)
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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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EmitCFIStartProcImpl(Frame);
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FrameInfos.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::RecordProcStart(MCDwarfFrameInfo &Frame) {
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Frame.Function = LastSymbol;
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// If the function is externally visible, we need to create a local
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// symbol to avoid relocations.
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StringRef Prefix = getContext().getAsmInfo()->getPrivateGlobalPrefix();
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if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
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Frame.Begin = LastSymbol;
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} else {
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Frame.Begin = getContext().CreateTempSymbol();
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EmitLabel(Frame.Begin);
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}
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}
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void MCStreamer::EmitCFIEndProc() {
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EnsureValidFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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EmitCFIEndProcImpl(*CurFrame);
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}
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void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
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}
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void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
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Frame.End = getContext().CreateTempSymbol();
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EmitLabel(Frame.End);
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}
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MCSymbol *MCStreamer::EmitCFICommon() {
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EnsureValidFrame();
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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 = getCurrentFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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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 = getCurrentFrameInfo();
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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 = getCurrentFrameInfo();
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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 = getCurrentFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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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 = getCurrentFrameInfo();
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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 = getCurrentFrameInfo();
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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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EnsureValidFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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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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EnsureValidFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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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 = getCurrentFrameInfo();
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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 = getCurrentFrameInfo();
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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 = getCurrentFrameInfo();
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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 = getCurrentFrameInfo();
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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 = getCurrentFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFISignalFrame() {
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EnsureValidFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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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 = getCurrentFrameInfo();
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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 = getCurrentFrameInfo();
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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 = getCurrentFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
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W64UnwindInfos.push_back(Frame);
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CurrentW64UnwindInfo = W64UnwindInfos.back();
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}
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void MCStreamer::EnsureValidW64UnwindInfo() {
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MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
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if (!CurFrame || CurFrame->End)
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report_fatal_error("No open Win64 EH frame function!");
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}
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void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
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MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
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if (CurFrame && !CurFrame->End)
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report_fatal_error("Starting a function before ending the previous one!");
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MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
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Frame->Begin = getContext().CreateTempSymbol();
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Frame->Function = Symbol;
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EmitLabel(Frame->Begin);
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setCurrentW64UnwindInfo(Frame);
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}
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void MCStreamer::EmitWin64EHEndProc() {
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EnsureValidW64UnwindInfo();
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MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
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if (CurFrame->ChainedParent)
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report_fatal_error("Not all chained regions terminated!");
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|
CurFrame->End = getContext().CreateTempSymbol();
|
|
EmitLabel(CurFrame->End);
|
|
}
|
|
|
|
void MCStreamer::EmitWin64EHStartChained() {
|
|
EnsureValidW64UnwindInfo();
|
|
MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
|
|
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
|
|
Frame->Begin = getContext().CreateTempSymbol();
|
|
Frame->Function = CurFrame->Function;
|
|
Frame->ChainedParent = CurFrame;
|
|
EmitLabel(Frame->Begin);
|
|
setCurrentW64UnwindInfo(Frame);
|
|
}
|
|
|
|
void MCStreamer::EmitWin64EHEndChained() {
|
|
EnsureValidW64UnwindInfo();
|
|
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
|
|
if (!CurFrame->ChainedParent)
|
|
report_fatal_error("End of a chained region outside a chained region!");
|
|
CurFrame->End = getContext().CreateTempSymbol();
|
|
EmitLabel(CurFrame->End);
|
|
CurrentW64UnwindInfo = CurFrame->ChainedParent;
|
|
}
|
|
|
|
void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
|
|
bool Except) {
|
|
EnsureValidW64UnwindInfo();
|
|
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
|
|
if (CurFrame->ChainedParent)
|
|
report_fatal_error("Chained unwind areas can't have handlers!");
|
|
CurFrame->ExceptionHandler = Sym;
|
|
if (!Except && !Unwind)
|
|
report_fatal_error("Don't know what kind of handler this is!");
|
|
if (Unwind)
|
|
CurFrame->HandlesUnwind = true;
|
|
if (Except)
|
|
CurFrame->HandlesExceptions = true;
|
|
}
|
|
|
|
void MCStreamer::EmitWin64EHHandlerData() {
|
|
EnsureValidW64UnwindInfo();
|
|
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
|
|
if (CurFrame->ChainedParent)
|
|
report_fatal_error("Chained unwind areas can't have handlers!");
|
|
}
|
|
|
|
void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
|
|
EnsureValidW64UnwindInfo();
|
|
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
|
|
MCSymbol *Label = getContext().CreateTempSymbol();
|
|
MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
|
|
EmitLabel(Label);
|
|
CurFrame->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
|
|
EnsureValidW64UnwindInfo();
|
|
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
|
|
if (CurFrame->LastFrameInst >= 0)
|
|
report_fatal_error("Frame register and offset already specified!");
|
|
if (Offset & 0x0F)
|
|
report_fatal_error("Misaligned frame pointer offset!");
|
|
MCSymbol *Label = getContext().CreateTempSymbol();
|
|
MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset);
|
|
EmitLabel(Label);
|
|
CurFrame->LastFrameInst = CurFrame->Instructions.size();
|
|
CurFrame->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
|
|
EnsureValidW64UnwindInfo();
|
|
if (Size & 7)
|
|
report_fatal_error("Misaligned stack allocation!");
|
|
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
|
|
MCSymbol *Label = getContext().CreateTempSymbol();
|
|
MCWin64EHInstruction Inst(Label, Size);
|
|
EmitLabel(Label);
|
|
CurFrame->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
|
|
EnsureValidW64UnwindInfo();
|
|
if (Offset & 7)
|
|
report_fatal_error("Misaligned saved register offset!");
|
|
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
|
|
MCSymbol *Label = getContext().CreateTempSymbol();
|
|
MCWin64EHInstruction Inst(
|
|
Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
|
|
Label, Register, Offset);
|
|
EmitLabel(Label);
|
|
CurFrame->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
|
|
EnsureValidW64UnwindInfo();
|
|
if (Offset & 0x0F)
|
|
report_fatal_error("Misaligned saved vector register offset!");
|
|
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
|
|
MCSymbol *Label = getContext().CreateTempSymbol();
|
|
MCWin64EHInstruction Inst(
|
|
Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
|
|
Label, Register, Offset);
|
|
EmitLabel(Label);
|
|
CurFrame->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWin64EHPushFrame(bool Code) {
|
|
EnsureValidW64UnwindInfo();
|
|
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
|
|
if (CurFrame->Instructions.size() > 0)
|
|
report_fatal_error("If present, PushMachFrame must be the first UOP");
|
|
MCSymbol *Label = getContext().CreateTempSymbol();
|
|
MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
|
|
EmitLabel(Label);
|
|
CurFrame->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWin64EHEndProlog() {
|
|
EnsureValidW64UnwindInfo();
|
|
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
|
|
CurFrame->PrologEnd = getContext().CreateTempSymbol();
|
|
EmitLabel(CurFrame->PrologEnd);
|
|
}
|
|
|
|
void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
|
|
llvm_unreachable("This file format doesn't support this directive");
|
|
}
|
|
|
|
void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
|
|
llvm_unreachable("This file format doesn't support this directive");
|
|
}
|
|
|
|
/// 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::EmitFrames(MCAsmBackend *MAB, bool usingCFI) {
|
|
if (!getNumFrameInfos())
|
|
return;
|
|
|
|
if (EmitEHFrame)
|
|
MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, true);
|
|
|
|
if (EmitDebugFrame)
|
|
MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, false);
|
|
}
|
|
|
|
void MCStreamer::EmitW64Tables() {
|
|
if (!getNumW64UnwindInfos())
|
|
return;
|
|
|
|
MCWin64EHUnwindEmitter::Emit(*this);
|
|
}
|
|
|
|
void MCStreamer::Finish() {
|
|
if (!FrameInfos.empty() && !FrameInfos.back().End)
|
|
report_fatal_error("Unfinished frame!");
|
|
|
|
FinishImpl();
|
|
}
|
|
|
|
MCSymbolData &MCStreamer::getOrCreateSymbolData(MCSymbol *Symbol) {
|
|
report_fatal_error("Not supported!");
|
|
return *(static_cast<MCSymbolData*>(0));
|
|
}
|