lib/Target/AVR/AVRTargetObjectFile.cpp

   1 //===-- AVRTargetObjectFile.cpp - AVR Object Files ------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "AVRTargetObjectFile.h"
  11
  12 #include "llvm/BinaryFormat/ELF.h"
  13 #include "llvm/IR/DerivedTypes.h"
  14 #include "llvm/IR/GlobalValue.h"
  15 #include "llvm/IR/Mangler.h"
  16 #include "llvm/MC/MCContext.h"
  17 #include "llvm/MC/MCSectionELF.h"
  18
  19 #include "AVR.h"
  20
  21 namespace llvm {
  22 void AVRTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM) {
  23   Base::Initialize(Ctx, TM);
  24   ProgmemDataSection =
  25       Ctx.getELFSection(".progmem.data", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
  26 }
  27
  28 MCSection *
  29 AVRTargetObjectFile::SelectSectionForGlobal(const GlobalObject *GO,
  30                                             SectionKind Kind,
  31                                             const TargetMachine &TM) const {
  32   // Global values in flash memory are placed in the progmem.data section
  33   // unless they already have a user assigned section.
  34   if (AVR::isProgramMemoryAddress(GO) && !GO->hasSection())
  35     return ProgmemDataSection;
  36
  37   // Otherwise, we work the same way as ELF.
  38   return Base::SelectSectionForGlobal(GO, Kind, TM);
  39 }
  40 } // end of namespace llvm
  41