84bbaa097c
Global data is emitted into parts, which are modelled as a MCSection. A label (symbol of type LD) is not allowed in a part, which requires special handling. The approach is to not emit the label at all, and using the part symbol in relocations.
84 lines
3.1 KiB
C++
84 lines
3.1 KiB
C++
//===- lib/MC/MCGOFFStreamer.cpp - GOFF Object 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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//
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// This file assembles .s files and emits GOFF .o object files.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCGOFFStreamer.h"
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#include "llvm/BinaryFormat/GOFF.h"
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#include "llvm/MC/MCAsmBackend.h"
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#include "llvm/MC/MCAssembler.h"
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#include "llvm/MC/MCCodeEmitter.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCDirectives.h"
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#include "llvm/MC/MCGOFFObjectWriter.h"
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#include "llvm/MC/MCObjectStreamer.h"
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#include "llvm/MC/MCSymbolGOFF.h"
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#include "llvm/MC/TargetRegistry.h"
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using namespace llvm;
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MCGOFFStreamer::MCGOFFStreamer(MCContext &Context,
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std::unique_ptr<MCAsmBackend> MAB,
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std::unique_ptr<MCObjectWriter> OW,
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std::unique_ptr<MCCodeEmitter> Emitter)
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: MCObjectStreamer(Context, std::move(MAB), std::move(OW),
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std::move(Emitter)) {}
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MCGOFFStreamer::~MCGOFFStreamer() = default;
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void MCGOFFStreamer::finishImpl() {
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getWriter().setRootSD(static_cast<MCSectionGOFF *>(
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getContext().getObjectFileInfo()->getTextSection())
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->getParent());
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MCObjectStreamer::finishImpl();
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}
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GOFFObjectWriter &MCGOFFStreamer::getWriter() {
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return static_cast<GOFFObjectWriter &>(getAssembler().getWriter());
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}
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void MCGOFFStreamer::changeSection(MCSection *Section, uint32_t Subsection) {
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// Make sure that all section are registered in the correct order.
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SmallVector<MCSectionGOFF *> Sections;
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for (auto *S = static_cast<MCSectionGOFF *>(Section); S; S = S->getParent())
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Sections.push_back(S);
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while (!Sections.empty()) {
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auto *S = Sections.pop_back_val();
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MCObjectStreamer::changeSection(S, Sections.empty() ? Subsection : 0);
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}
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}
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void MCGOFFStreamer::emitLabel(MCSymbol *Symbol, SMLoc Loc) {
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MCSectionGOFF *Section =
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static_cast<MCSectionGOFF *>(getCurrentSectionOnly());
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if (Section->isPR()) {
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if (Section->getBeginSymbol() == nullptr)
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Section->setBeginSymbol(Symbol);
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else
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getContext().reportError(
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Loc, "only one symbol can be defined in a PR section.");
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}
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MCObjectStreamer::emitLabel(Symbol, Loc);
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}
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bool MCGOFFStreamer::emitSymbolAttribute(MCSymbol *Sym,
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MCSymbolAttr Attribute) {
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return static_cast<MCSymbolGOFF *>(Sym)->setSymbolAttribute(Attribute);
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}
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MCStreamer *llvm::createGOFFStreamer(MCContext &Context,
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std::unique_ptr<MCAsmBackend> &&MAB,
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std::unique_ptr<MCObjectWriter> &&OW,
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std::unique_ptr<MCCodeEmitter> &&CE) {
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MCGOFFStreamer *S =
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new MCGOFFStreamer(Context, std::move(MAB), std::move(OW), std::move(CE));
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return S;
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}
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