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/MCExpr.h"
13 #include "llvm/MC/MCValue.h"
14 #include "llvm/MC/MCWinCOFFObjectWriter.h"
15 #include "llvm/Support/COFF.h"
16 #include "llvm/Support/ErrorHandling.h"
17
18 using namespace llvm;
19
20 namespace llvm {
21 class MCObjectWriter;
22 }
23
24 namespace {
25 class X86WinCOFFObjectWriter : public MCWinCOFFObjectTargetWriter {
26 const bool Is64Bit;
27
28 public:
29 X86WinCOFFObjectWriter(bool Is64Bit_);
30 ~X86WinCOFFObjectWriter();
31
32 virtual unsigned getRelocType(const MCValue &Target,
33 const MCFixup &Fixup,
34 bool IsCrossSection) const LLVM_OVERRIDE;
35 };
36 }
37
X86WinCOFFObjectWriter(bool Is64Bit_)38 X86WinCOFFObjectWriter::X86WinCOFFObjectWriter(bool Is64Bit_)
39 : MCWinCOFFObjectTargetWriter(Is64Bit_ ? COFF::IMAGE_FILE_MACHINE_AMD64 :
40 COFF::IMAGE_FILE_MACHINE_I386),
41 Is64Bit(Is64Bit_) {}
42
~X86WinCOFFObjectWriter()43 X86WinCOFFObjectWriter::~X86WinCOFFObjectWriter() {}
44
getRelocType(const MCValue & Target,const MCFixup & Fixup,bool IsCrossSection) const45 unsigned X86WinCOFFObjectWriter::getRelocType(const MCValue &Target,
46 const MCFixup &Fixup,
47 bool IsCrossSection) const {
48 unsigned FixupKind = IsCrossSection ? FK_PCRel_4 : Fixup.getKind();
49
50 MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ?
51 MCSymbolRefExpr::VK_None : Target.getSymA()->getKind();
52
53 switch (FixupKind) {
54 case FK_PCRel_4:
55 case X86::reloc_riprel_4byte:
56 case X86::reloc_riprel_4byte_movq_load:
57 return Is64Bit ? COFF::IMAGE_REL_AMD64_REL32 : COFF::IMAGE_REL_I386_REL32;
58 case FK_Data_4:
59 case X86::reloc_signed_4byte:
60 if (Modifier == MCSymbolRefExpr::VK_COFF_IMGREL32)
61 return Is64Bit ? COFF::IMAGE_REL_AMD64_ADDR32NB :
62 COFF::IMAGE_REL_I386_DIR32NB;
63 return Is64Bit ? COFF::IMAGE_REL_AMD64_ADDR32 : COFF::IMAGE_REL_I386_DIR32;
64 case FK_Data_8:
65 if (Is64Bit)
66 return COFF::IMAGE_REL_AMD64_ADDR64;
67 llvm_unreachable("unsupported relocation type");
68 case FK_SecRel_4:
69 return Is64Bit ? COFF::IMAGE_REL_AMD64_SECREL : COFF::IMAGE_REL_I386_SECREL;
70 default:
71 llvm_unreachable("unsupported relocation type");
72 }
73 }
74
createX86WinCOFFObjectWriter(raw_ostream & OS,bool Is64Bit)75 MCObjectWriter *llvm::createX86WinCOFFObjectWriter(raw_ostream &OS,
76 bool Is64Bit) {
77 MCWinCOFFObjectTargetWriter *MOTW = new X86WinCOFFObjectWriter(Is64Bit);
78 return createWinCOFFObjectWriter(MOTW, OS);
79 }
80