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 "llvm/MC/MCContext.h"
  13 #include "llvm/MC/MCSectionELF.h"
  14 #include "llvm/Target/TargetMachine.h"
  15 using namespace llvm;
  16
  17
  18 void XCoreTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM){
  19   TargetLoweringObjectFileELF::Initialize(Ctx, TM);
  20
  21   DataSection =
  22     Ctx.getELFSection(".dp.data", MCSectionELF::SHT_PROGBITS,
  23                       MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE |
  24                       MCSectionELF::XCORE_SHF_DP_SECTION,
  25                       SectionKind::getDataRel(), false);
  26   BSSSection =
  27     Ctx.getELFSection(".dp.bss", MCSectionELF::SHT_NOBITS,
  28                       MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_WRITE |
  29                       MCSectionELF::XCORE_SHF_DP_SECTION,
  30                       SectionKind::getBSS(), false);
  31
  32   MergeableConst4Section =
  33     Ctx.getELFSection(".cp.rodata.cst4", MCSectionELF::SHT_PROGBITS,
  34                       MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_MERGE |
  35                       MCSectionELF::XCORE_SHF_CP_SECTION,
  36                       SectionKind::getMergeableConst4(), false);
  37   MergeableConst8Section =
  38     Ctx.getELFSection(".cp.rodata.cst8", MCSectionELF::SHT_PROGBITS,
  39                       MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_MERGE |
  40                       MCSectionELF::XCORE_SHF_CP_SECTION,
  41                       SectionKind::getMergeableConst8(), false);
  42   MergeableConst16Section =
  43     Ctx.getELFSection(".cp.rodata.cst16", MCSectionELF::SHT_PROGBITS,
  44                       MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_MERGE |
  45                       MCSectionELF::XCORE_SHF_CP_SECTION,
  46                       SectionKind::getMergeableConst16(), false);
  47
  48   // TLS globals are lowered in the backend to arrays indexed by the current
  49   // thread id. After lowering they require no special handling by the linker
  50   // and can be placed in the standard data / bss sections.
  51   TLSDataSection = DataSection;
  52   TLSBSSSection = BSSSection;
  53
  54   ReadOnlySection =
  55     Ctx.getELFSection(".cp.rodata", MCSectionELF::SHT_PROGBITS,
  56                       MCSectionELF::SHF_ALLOC |
  57                       MCSectionELF::XCORE_SHF_CP_SECTION,
  58                       SectionKind::getReadOnlyWithRel(), false);
  59
  60   // Dynamic linking is not supported. Data with relocations is placed in the
  61   // same section as data without relocations.
  62   DataRelSection = DataRelLocalSection = DataSection;
  63   DataRelROSection = DataRelROLocalSection = ReadOnlySection;
  64 }