lib/Target/XCore/XCoreTargetObjectFile.cpp

   1 //===-- XCoreTargetObjectFile.cpp - XCore 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 "XCoreTargetObjectFile.h"
  11 #include "XCoreSubtarget.h"
  12 #include "MCSectionXCore.h"
  13 #include "llvm/Target/TargetMachine.h"
  14 using namespace llvm;
  15
  16
  17 void XCoreTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM){
  18   TargetLoweringObjectFileELF::Initialize(Ctx, TM);
  19
  20   DataSection =
  21     MCSectionXCore::Create(".dp.data", MCSectionELF::SHT_PROGBITS,
  22                            MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE |
  23                            MCSectionXCore::SHF_DP_SECTION,
  24                            SectionKind::getDataRel(), false, getContext());
  25   BSSSection =
  26     MCSectionXCore::Create(".dp.bss", MCSectionELF::SHT_NOBITS,
  27                            MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE |
  28                            MCSectionXCore::SHF_DP_SECTION,
  29                            SectionKind::getBSS(), false, getContext());
  30
  31   // For now, disable lowering of mergable sections, just drop everything into
  32   // ReadOnly.
  33   MergeableConst4Section = 0;
  34   MergeableConst8Section = 0;
  35   MergeableConst16Section = 0;
  36
  37   // TLS globals are lowered in the backend to arrays indexed by the current
  38   // thread id. After lowering they require no special handling by the linker
  39   // and can be placed in the standard data / bss sections.
  40   TLSDataSection = DataSection;
  41   TLSBSSSection = BSSSection;
  42
  43   if (TM.getSubtarget<XCoreSubtarget>().isXS1A())
  44     ReadOnlySection =   // FIXME: Why is this a writable section for XS1A?
  45       MCSectionXCore::Create(".dp.rodata", MCSectionELF::SHT_PROGBITS,
  46                              MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE |
  47                              MCSectionXCore::SHF_DP_SECTION,
  48                              SectionKind::getDataRel(), false, getContext());
  49   else
  50     ReadOnlySection =
  51       MCSectionXCore::Create(".cp.rodata", MCSectionELF::SHT_PROGBITS,
  52                              MCSectionELF::SHF_ALLOC |
  53                              MCSectionXCore::SHF_CP_SECTION,
  54                              SectionKind::getReadOnly(), false, getContext());
  55 }