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5a37407a86
Before, we would have conditional operators where one side of the operator would be of type RelocationTypeAMD64 and the other is of type RelocationTypeI386. GCC would noisly warn with -Wenum-compare diagnostic. Instead, refactor the code so it is more like the X86 ELF object writer. llvm-svn: 205752
96 lines
3.2 KiB
C++
96 lines
3.2 KiB
C++
//===-- X86WinCOFFObjectWriter.cpp - X86 Win COFF Writer ------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "MCTargetDesc/X86FixupKinds.h"
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#include "MCTargetDesc/X86MCTargetDesc.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCValue.h"
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#include "llvm/MC/MCWinCOFFObjectWriter.h"
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#include "llvm/Support/COFF.h"
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#include "llvm/Support/ErrorHandling.h"
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using namespace llvm;
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namespace llvm {
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class MCObjectWriter;
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}
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namespace {
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class X86WinCOFFObjectWriter : public MCWinCOFFObjectTargetWriter {
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public:
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X86WinCOFFObjectWriter(bool Is64Bit);
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virtual ~X86WinCOFFObjectWriter();
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unsigned getRelocType(const MCValue &Target, const MCFixup &Fixup,
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bool IsCrossSection) const override;
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};
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}
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X86WinCOFFObjectWriter::X86WinCOFFObjectWriter(bool Is64Bit)
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: MCWinCOFFObjectTargetWriter(Is64Bit ? COFF::IMAGE_FILE_MACHINE_AMD64
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: COFF::IMAGE_FILE_MACHINE_I386) {}
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X86WinCOFFObjectWriter::~X86WinCOFFObjectWriter() {}
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unsigned X86WinCOFFObjectWriter::getRelocType(const MCValue &Target,
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const MCFixup &Fixup,
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bool IsCrossSection) const {
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unsigned FixupKind = IsCrossSection ? FK_PCRel_4 : Fixup.getKind();
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MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ?
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MCSymbolRefExpr::VK_None : Target.getSymA()->getKind();
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if (getMachine() == COFF::IMAGE_FILE_MACHINE_AMD64) {
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switch (FixupKind) {
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case FK_PCRel_4:
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case X86::reloc_riprel_4byte:
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case X86::reloc_riprel_4byte_movq_load:
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return COFF::IMAGE_REL_AMD64_REL32;
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case FK_Data_4:
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case X86::reloc_signed_4byte:
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if (Modifier == MCSymbolRefExpr::VK_COFF_IMGREL32)
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return COFF::IMAGE_REL_AMD64_ADDR32NB;
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return COFF::IMAGE_REL_AMD64_ADDR32;
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case FK_Data_8:
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return COFF::IMAGE_REL_AMD64_ADDR64;
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case FK_SecRel_2:
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return COFF::IMAGE_REL_AMD64_SECTION;
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case FK_SecRel_4:
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return COFF::IMAGE_REL_AMD64_SECREL;
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default:
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llvm_unreachable("unsupported relocation type");
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}
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} else if (getMachine() == COFF::IMAGE_FILE_MACHINE_I386) {
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switch (FixupKind) {
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case FK_PCRel_4:
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case X86::reloc_riprel_4byte:
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case X86::reloc_riprel_4byte_movq_load:
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return COFF::IMAGE_REL_I386_REL32;
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case FK_Data_4:
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case X86::reloc_signed_4byte:
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if (Modifier == MCSymbolRefExpr::VK_COFF_IMGREL32)
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return COFF::IMAGE_REL_I386_DIR32NB;
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return COFF::IMAGE_REL_I386_DIR32;
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case FK_SecRel_2:
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return COFF::IMAGE_REL_I386_SECTION;
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case FK_SecRel_4:
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return COFF::IMAGE_REL_I386_SECREL;
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default:
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llvm_unreachable("unsupported relocation type");
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}
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} else
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llvm_unreachable("Unsupported COFF machine type.");
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}
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MCObjectWriter *llvm::createX86WinCOFFObjectWriter(raw_ostream &OS,
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bool Is64Bit) {
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MCWinCOFFObjectTargetWriter *MOTW = new X86WinCOFFObjectWriter(Is64Bit);
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return createWinCOFFObjectWriter(MOTW, OS);
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}
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