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      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   case FK_Data_4:
     48   case X86::reloc_signed_4byte:
     49     return Is64Bit ? COFF::IMAGE_REL_AMD64_ADDR32 : COFF::IMAGE_REL_I386_DIR32;
     50   case FK_Data_8:
     51     if (Is64Bit)
     52       return COFF::IMAGE_REL_AMD64_ADDR64;
     53     llvm_unreachable("unsupported relocation type");
     54   case FK_SecRel_4:
     55     return Is64Bit ? COFF::IMAGE_REL_AMD64_SECREL : COFF::IMAGE_REL_I386_SECREL;
     56   default:
     57     llvm_unreachable("unsupported relocation type");
     58   }
     59 }
     60 
     61 MCObjectWriter *llvm::createX86WinCOFFObjectWriter(raw_ostream &OS,
     62                                                    bool Is64Bit) {
     63   MCWinCOFFObjectTargetWriter *MOTW = new X86WinCOFFObjectWriter(Is64Bit);
     64   return createWinCOFFObjectWriter(MOTW, OS);
     65 }
     66