llvm/lib/Target/M68k/M68kTargetObjectFile.cpp

   1 //===-- M68kELFTargetObjectFile.cpp - M68k Object Files -----*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 ///
   9 /// \file
  10 /// This file contains definitions for M68k ELF object file lowering.
  11 ///
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "M68kTargetObjectFile.h"
  15
  16 #include "M68kSubtarget.h"
  17 #include "M68kTargetMachine.h"
  18
  19 #include "llvm/BinaryFormat/ELF.h"
  20 #include "llvm/IR/DataLayout.h"
  21 #include "llvm/IR/DerivedTypes.h"
  22 #include "llvm/IR/GlobalVariable.h"
  23 #include "llvm/MC/MCContext.h"
  24 #include "llvm/MC/MCSectionELF.h"
  25 #include "llvm/Support/CommandLine.h"
  26 #include "llvm/Target/TargetMachine.h"
  27
  28 using namespace llvm;
  29
  30 static cl::opt<unsigned> SSThreshold(
  31     "m68k-ssection-threshold", cl::Hidden,
  32     cl::desc("Small data and bss section threshold size (default=8)"),
  33     cl::init(8));
  34
  35 void M68kELFTargetObjectFile::Initialize(MCContext &Ctx,
  36                                          const TargetMachine &TM) {
  37   TargetLoweringObjectFileELF::Initialize(Ctx, TM);
  38   InitializeELF(TM.Options.UseInitArray);
  39
  40   this->TM = &static_cast<const M68kTargetMachine &>(TM);
  41
  42   // FIXME do we need `.sdata` and `.sbss` explicitly?
  43   SmallDataSection = getContext().getELFSection(
  44       ".sdata", ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC);
  45
  46   SmallBSSSection = getContext().getELFSection(".sbss", ELF::SHT_NOBITS,
  47                                                ELF::SHF_WRITE | ELF::SHF_ALLOC);
  48 }