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 #include "llvm/Support/ELF.h"
  16 using namespace llvm;
  17
  18
  19 void XCoreTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM){
  20   TargetLoweringObjectFileELF::Initialize(Ctx, TM);
  21
  22   DataSection =
  23     Ctx.getELFSection(".dp.data", ELF::SHT_PROGBITS,
  24                       ELF::SHF_ALLOC | ELF::SHF_WRITE |
  25                       ELF::XCORE_SHF_DP_SECTION,
  26                       SectionKind::getDataRel());
  27   BSSSection =
  28     Ctx.getELFSection(".dp.bss", ELF::SHT_NOBITS,
  29                       ELF::SHF_ALLOC | ELF::SHF_WRITE |
  30                       ELF::XCORE_SHF_DP_SECTION,
  31                       SectionKind::getBSS());
  32
  33   MergeableConst4Section =
  34     Ctx.getELFSection(".cp.rodata.cst4", ELF::SHT_PROGBITS,
  35                       ELF::SHF_ALLOC | ELF::SHF_MERGE |
  36                       ELF::XCORE_SHF_CP_SECTION,
  37                       SectionKind::getMergeableConst4());
  38   MergeableConst8Section =
  39     Ctx.getELFSection(".cp.rodata.cst8", ELF::SHT_PROGBITS,
  40                       ELF::SHF_ALLOC | ELF::SHF_MERGE |
  41                       ELF::XCORE_SHF_CP_SECTION,
  42                       SectionKind::getMergeableConst8());
  43   MergeableConst16Section =
  44     Ctx.getELFSection(".cp.rodata.cst16", ELF::SHT_PROGBITS,
  45                       ELF::SHF_ALLOC | ELF::SHF_MERGE |
  46                       ELF::XCORE_SHF_CP_SECTION,
  47                       SectionKind::getMergeableConst16());
  48
  49   // TLS globals are lowered in the backend to arrays indexed by the current
  50   // thread id. After lowering they require no special handling by the linker
  51   // and can be placed in the standard data / bss sections.
  52   TLSDataSection = DataSection;
  53   TLSBSSSection = BSSSection;
  54
  55   ReadOnlySection =
  56     Ctx.getELFSection(".cp.rodata", ELF::SHT_PROGBITS,
  57                       ELF::SHF_ALLOC |
  58                       ELF::XCORE_SHF_CP_SECTION,
  59                       SectionKind::getReadOnlyWithRel());
  60
  61   // Dynamic linking is not supported. Data with relocations is placed in the
  62   // same section as data without relocations.
  63   DataRelSection = DataRelLocalSection = DataSection;
  64   DataRelROSection = DataRelROLocalSection = ReadOnlySection;
  65 }