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| //===- lib/MC/MCXCOFFStreamer.cpp - XCOFF Object Output -------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file assembles .s files and emits XCOFF .o object files.
//
//===----------------------------------------------------------------------===//
#include "llvm/BinaryFormat/XCOFF.h"
#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCSymbolXCOFF.h"
#include "llvm/MC/MCXCOFFStreamer.h"
#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
MCXCOFFStreamer::MCXCOFFStreamer(MCContext &Context,
std::unique_ptr<MCAsmBackend> MAB,
std::unique_ptr<MCObjectWriter> OW,
std::unique_ptr<MCCodeEmitter> Emitter)
: MCObjectStreamer(Context, std::move(MAB), std::move(OW),
std::move(Emitter)) {}
bool MCXCOFFStreamer::EmitSymbolAttribute(MCSymbol *Sym,
MCSymbolAttr Attribute) {
auto *Symbol = cast<MCSymbolXCOFF>(Sym);
getAssembler().registerSymbol(*Symbol);
switch (Attribute) {
case MCSA_Global:
Symbol->setStorageClass(XCOFF::C_EXT);
Symbol->setExternal(true);
break;
default:
report_fatal_error("Not implemented yet.");
}
return true;
}
void MCXCOFFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment) {
getAssembler().registerSymbol(*Symbol);
Symbol->setExternal(cast<MCSymbolXCOFF>(Symbol)->getStorageClass() !=
XCOFF::C_HIDEXT);
Symbol->setCommon(Size, ByteAlignment);
// Need to add this symbol to the current Fragment which will belong to the
// containing CSECT.
auto *F = dyn_cast_or_null<MCDataFragment>(getCurrentFragment());
assert(F && "Expected a valid section with a fragment set.");
Symbol->setFragment(F);
// Emit the alignment and storage for the variable to the section.
EmitValueToAlignment(ByteAlignment);
EmitZeros(Size);
}
void MCXCOFFStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol,
uint64_t Size, unsigned ByteAlignment,
SMLoc Loc) {
report_fatal_error("Zero fill not implemented for XCOFF.");
}
void MCXCOFFStreamer::EmitInstToData(const MCInst &Inst,
const MCSubtargetInfo &STI) {
MCAssembler &Assembler = getAssembler();
SmallVector<MCFixup, 4> Fixups;
SmallString<256> Code;
raw_svector_ostream VecOS(Code);
Assembler.getEmitter().encodeInstruction(Inst, VecOS, Fixups, STI);
// TODO: Handle Fixups later
MCDataFragment *DF = getOrCreateDataFragment(&STI);
DF->setHasInstructions(STI);
DF->getContents().append(Code.begin(), Code.end());
}
MCStreamer *llvm::createXCOFFStreamer(MCContext &Context,
std::unique_ptr<MCAsmBackend> &&MAB,
std::unique_ptr<MCObjectWriter> &&OW,
std::unique_ptr<MCCodeEmitter> &&CE,
bool RelaxAll) {
MCXCOFFStreamer *S = new MCXCOFFStreamer(Context, std::move(MAB),
std::move(OW), std::move(CE));
if (RelaxAll)
S->getAssembler().setRelaxAll(true);
return S;
}
void MCXCOFFStreamer::EmitXCOFFLocalCommonSymbol(MCSymbol *Symbol,
uint64_t Size,
unsigned ByteAlignment) {
EmitCommonSymbol(Symbol, Size, ByteAlignment);
}
|