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24233f2415
Summary: Adds support for emitting common local global symbols to an XCOFF object file. Local commons are emitted into the .bss section with a storage class of C_HIDEXT. Patch by: daltenty Reviewers: sfertile, hubert.reinterpretcast Differential Revision: https://reviews.llvm.org/D66097 llvm-svn: 370070
81 lines
3.3 KiB
C++
81 lines
3.3 KiB
C++
//===- lib/MC/MCXCOFFStreamer.cpp - XCOFF 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 XCOFF .o object files.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/BinaryFormat/XCOFF.h"
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#include "llvm/MC/MCAsmBackend.h"
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#include "llvm/MC/MCCodeEmitter.h"
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#include "llvm/MC/MCObjectWriter.h"
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#include "llvm/MC/MCSymbolXCOFF.h"
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#include "llvm/MC/MCXCOFFStreamer.h"
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#include "llvm/Support/TargetRegistry.h"
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using namespace llvm;
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MCXCOFFStreamer::MCXCOFFStreamer(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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bool MCXCOFFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
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MCSymbolAttr Attribute) {
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report_fatal_error("Symbol attributes not implemented for XCOFF.");
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}
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void MCXCOFFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment) {
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getAssembler().registerSymbol(*Symbol);
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Symbol->setExternal(cast<MCSymbolXCOFF>(Symbol)->getStorageClass() !=
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XCOFF::C_HIDEXT);
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Symbol->setCommon(Size, ByteAlignment);
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// Need to add this symbol to the current Fragment which will belong to the
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// containing CSECT.
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auto *F = dyn_cast_or_null<MCDataFragment>(getCurrentFragment());
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assert(F && "Expected a valid section with a fragment set.");
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Symbol->setFragment(F);
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// Emit the alignment and storage for the variable to the section.
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EmitValueToAlignment(ByteAlignment);
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EmitZeros(Size);
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}
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void MCXCOFFStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol,
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uint64_t Size, unsigned ByteAlignment,
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SMLoc Loc) {
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report_fatal_error("Zero fill not implemented for XCOFF.");
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}
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void MCXCOFFStreamer::EmitInstToData(const MCInst &Inst,
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const MCSubtargetInfo &) {
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report_fatal_error("Instruction emission not implemented for XCOFF.");
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}
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MCStreamer *llvm::createXCOFFStreamer(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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bool RelaxAll) {
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MCXCOFFStreamer *S = new MCXCOFFStreamer(Context, std::move(MAB),
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std::move(OW), std::move(CE));
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if (RelaxAll)
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S->getAssembler().setRelaxAll(true);
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return S;
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}
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void MCXCOFFStreamer::EmitXCOFFLocalCommonSymbol(MCSymbol *Symbol,
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uint64_t Size,
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unsigned ByteAlignment) {
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EmitCommonSymbol(Symbol, Size, ByteAlignment);
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}
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