lib/Target/AVR/AVRTargetObjectFile.cpp

   1 //===-- AVRTargetObjectFile.cpp - AVR Object Files ------------------------===//
   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 #include "AVRTargetObjectFile.h"
  10
  11 #include "llvm/BinaryFormat/ELF.h"
  12 #include "llvm/IR/DerivedTypes.h"
  13 #include "llvm/IR/GlobalValue.h"
  14 #include "llvm/IR/Mangler.h"
  15 #include "llvm/MC/MCContext.h"
  16 #include "llvm/MC/MCSectionELF.h"
  17
  18 #include "AVR.h"
  19
  20 namespace llvm {
  21 void AVRTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM) {
  22   Base::Initialize(Ctx, TM);
  23   ProgmemDataSection =
  24       Ctx.getELFSection(".progmem.data", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
  25 }
  26
  27 MCSection *
  28 AVRTargetObjectFile::SelectSectionForGlobal(const GlobalObject *GO,
  29                                             SectionKind Kind,
  30                                             const TargetMachine &TM) const {
  31   // Global values in flash memory are placed in the progmem.data section
  32   // unless they already have a user assigned section.
  33   if (AVR::isProgramMemoryAddress(GO) && !GO->hasSection())
  34     return ProgmemDataSection;
  35
  36   // Otherwise, we work the same way as ELF.
  37   return Base::SelectSectionForGlobal(GO, Kind, TM);
  38 }
  39 } // end of namespace llvm
  40