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//===-- X86WinCOFFObjectWriter.cpp - X86 Win COFF Writer ------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "MCTargetDesc/X86FixupKinds.h"
#include "MCTargetDesc/X86MCTargetDesc.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCValue.h"
#include "llvm/MC/MCWinCOFFObjectWriter.h"
#include "llvm/Support/COFF.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
namespace llvm {
class MCObjectWriter;
}
namespace {
class X86WinCOFFObjectWriter : public MCWinCOFFObjectTargetWriter {
public:
X86WinCOFFObjectWriter(bool Is64Bit);
virtual ~X86WinCOFFObjectWriter();
unsigned getRelocType(const MCValue &Target, const MCFixup &Fixup,
bool IsCrossSection) const override;
};
}
X86WinCOFFObjectWriter::X86WinCOFFObjectWriter(bool Is64Bit)
: MCWinCOFFObjectTargetWriter(Is64Bit ? COFF::IMAGE_FILE_MACHINE_AMD64
: COFF::IMAGE_FILE_MACHINE_I386) {}
X86WinCOFFObjectWriter::~X86WinCOFFObjectWriter() {}
unsigned X86WinCOFFObjectWriter::getRelocType(const MCValue &Target,
const MCFixup &Fixup,
bool IsCrossSection) const {
unsigned FixupKind = IsCrossSection ? FK_PCRel_4 : Fixup.getKind();
MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ?
MCSymbolRefExpr::VK_None : Target.getSymA()->getKind();
if (getMachine() == COFF::IMAGE_FILE_MACHINE_AMD64) {
switch (FixupKind) {
case FK_PCRel_4:
case X86::reloc_riprel_4byte:
case X86::reloc_riprel_4byte_movq_load:
return COFF::IMAGE_REL_AMD64_REL32;
case FK_Data_4:
case X86::reloc_signed_4byte:
if (Modifier == MCSymbolRefExpr::VK_COFF_IMGREL32)
return COFF::IMAGE_REL_AMD64_ADDR32NB;
return COFF::IMAGE_REL_AMD64_ADDR32;
case FK_Data_8:
return COFF::IMAGE_REL_AMD64_ADDR64;
case FK_SecRel_2:
return COFF::IMAGE_REL_AMD64_SECTION;
case FK_SecRel_4:
return COFF::IMAGE_REL_AMD64_SECREL;
default:
llvm_unreachable("unsupported relocation type");
}
} else if (getMachine() == COFF::IMAGE_FILE_MACHINE_I386) {
switch (FixupKind) {
case FK_PCRel_4:
case X86::reloc_riprel_4byte:
case X86::reloc_riprel_4byte_movq_load:
return COFF::IMAGE_REL_I386_REL32;
case FK_Data_4:
case X86::reloc_signed_4byte:
if (Modifier == MCSymbolRefExpr::VK_COFF_IMGREL32)
return COFF::IMAGE_REL_I386_DIR32NB;
return COFF::IMAGE_REL_I386_DIR32;
case FK_SecRel_2:
return COFF::IMAGE_REL_I386_SECTION;
case FK_SecRel_4:
return COFF::IMAGE_REL_I386_SECREL;
default:
llvm_unreachable("unsupported relocation type");
}
} else
llvm_unreachable("Unsupported COFF machine type.");
}
MCObjectWriter *llvm::createX86WinCOFFObjectWriter(raw_ostream &OS,
bool Is64Bit) {
MCWinCOFFObjectTargetWriter *MOTW = new X86WinCOFFObjectWriter(Is64Bit);
return createWinCOFFObjectWriter(MOTW, OS);
}
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