lib/Target/X86/MCTargetDesc/X86WinCOFFObjectWriter.cpp

   1 //===-- X86WinCOFFObjectWriter.cpp - X86 Win COFF Writer ------------------===//
   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 "MCTargetDesc/X86FixupKinds.h"
  11 #include "MCTargetDesc/X86MCTargetDesc.h"
  12 #include "llvm/MC/MCWinCOFFObjectWriter.h"
  13 #include "llvm/Support/COFF.h"
  14 #include "llvm/Support/ErrorHandling.h"
  15
  16 using namespace llvm;
  17
  18 namespace llvm {
  19   class MCObjectWriter;
  20 }
  21
  22 namespace {
  23   class X86WinCOFFObjectWriter : public MCWinCOFFObjectTargetWriter {
  24     const bool Is64Bit;
  25
  26   public:
  27     X86WinCOFFObjectWriter(bool Is64Bit_);
  28     ~X86WinCOFFObjectWriter();
  29
  30     virtual unsigned getRelocType(unsigned FixupKind) const;
  31   };
  32 }
  33
  34 X86WinCOFFObjectWriter::X86WinCOFFObjectWriter(bool Is64Bit_)
  35   : MCWinCOFFObjectTargetWriter(Is64Bit_ ? COFF::IMAGE_FILE_MACHINE_AMD64 :
  36                                 COFF::IMAGE_FILE_MACHINE_I386),
  37     Is64Bit(Is64Bit_) {}
  38
  39 X86WinCOFFObjectWriter::~X86WinCOFFObjectWriter() {}
  40
  41 unsigned X86WinCOFFObjectWriter::getRelocType(unsigned FixupKind) const {
  42   switch (FixupKind) {
  43   case FK_PCRel_4:
  44   case X86::reloc_riprel_4byte:
  45   case X86::reloc_riprel_4byte_movq_load:
  46     return Is64Bit ? COFF::IMAGE_REL_AMD64_REL32 : COFF::IMAGE_REL_I386_REL32;
  47     break;
  48   case FK_Data_4:
  49   case X86::reloc_signed_4byte:
  50     return Is64Bit ? COFF::IMAGE_REL_AMD64_ADDR32 : COFF::IMAGE_REL_I386_DIR32;
  51     break;
  52   case FK_Data_8:
  53     if (Is64Bit)
  54       return COFF::IMAGE_REL_AMD64_ADDR64;
  55     else
  56       llvm_unreachable("unsupported relocation type");
  57     break;
  58   case FK_SecRel_4:
  59     return Is64Bit ? COFF::IMAGE_REL_AMD64_SREL32 : COFF::IMAGE_REL_I386_SECREL;
  60     break;
  61   default:
  62     llvm_unreachable("unsupported relocation type");
  63   }
  64 }
  65
  66 MCObjectWriter *llvm::createX86WinCOFFObjectWriter(raw_ostream &OS,
  67                                                    bool Is64Bit) {
  68   MCWinCOFFObjectTargetWriter *MOTW = new X86WinCOFFObjectWriter(Is64Bit);
  69   return createWinCOFFObjectWriter(MOTW, OS);
  70 }