Coverage Report

Created: 2017-10-03 07:32

/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/lib/Target/BPF/MCTargetDesc/BPFELFObjectWriter.cpp
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//===-- BPFELFObjectWriter.cpp - BPF ELF 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/BPFMCTargetDesc.h"
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#include "llvm/BinaryFormat/ELF.h"
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#include "llvm/MC/MCELFObjectWriter.h"
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#include "llvm/MC/MCFixup.h"
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#include "llvm/Support/ErrorHandling.h"
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#include <cstdint>
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using namespace llvm;
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namespace {
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class BPFELFObjectWriter : public MCELFObjectTargetWriter {
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public:
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  BPFELFObjectWriter(uint8_t OSABI);
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  ~BPFELFObjectWriter() override = default;
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protected:
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  unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
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                        const MCFixup &Fixup, bool IsPCRel) const override;
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};
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} // end anonymous namespace
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BPFELFObjectWriter::BPFELFObjectWriter(uint8_t OSABI)
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    : MCELFObjectTargetWriter(/*Is64Bit*/ true, OSABI, ELF::EM_BPF,
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                              /*HasRelocationAddend*/ false) {}
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unsigned BPFELFObjectWriter::getRelocType(MCContext &Ctx, const MCValue &Target,
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                                          const MCFixup &Fixup,
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                                          bool IsPCRel) const {
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  // determine the type of the relocation
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  switch ((unsigned)Fixup.getKind()) {
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  default:
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    llvm_unreachable("invalid fixup kind!");
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  case FK_SecRel_8:
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    return ELF::R_BPF_64_64;
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  case FK_SecRel_4:
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    return ELF::R_BPF_64_32;
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  case FK_Data_8:
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    return ELF::R_BPF_64_64;
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  case FK_Data_4:
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    return ELF::R_BPF_64_32;
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  }
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}
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MCObjectWriter *llvm::createBPFELFObjectWriter(raw_pwrite_stream &OS,
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                                               uint8_t OSABI, bool IsLittleEndian) {
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  MCELFObjectTargetWriter *MOTW = new BPFELFObjectWriter(OSABI);
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  return createELFObjectWriter(MOTW, OS, IsLittleEndian);
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}