| //===- lib/MC/MCObjectWriter.cpp - MCObjectWriter implementation ----------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/MC/MCObjectWriter.h" |
| #include "llvm/MC/MCAssembler.h" |
| #include "llvm/MC/MCExpr.h" |
| #include "llvm/MC/MCFragment.h" |
| #include "llvm/MC/MCSymbol.h" |
| namespace llvm { |
| class MCSection; |
| } |
| |
| using namespace llvm; |
| |
| MCObjectWriter::~MCObjectWriter() = default; |
| |
| void MCObjectWriter::reset() { |
| FileNames.clear(); |
| AddrsigSyms.clear(); |
| EmitAddrsigSection = false; |
| SubsectionsViaSymbols = false; |
| CGProfile.clear(); |
| } |
| |
| bool MCObjectWriter::isSymbolRefDifferenceFullyResolved( |
| const MCAssembler &Asm, const MCSymbolRefExpr *A, const MCSymbolRefExpr *B, |
| bool InSet) const { |
| // Modified symbol references cannot be resolved. |
| if (A->getKind() != MCSymbolRefExpr::VK_None || |
| B->getKind() != MCSymbolRefExpr::VK_None) |
| return false; |
| |
| const MCSymbol &SA = A->getSymbol(); |
| const MCSymbol &SB = B->getSymbol(); |
| assert(!SA.isUndefined() && !SB.isUndefined()); |
| MCFragment *FB = SB.getFragment(); |
| if (!FB || !SA.getFragment()) |
| return false; |
| |
| return isSymbolRefDifferenceFullyResolvedImpl(Asm, SA, *FB, InSet, /*IsPCRel=*/false); |
| } |
| |
| bool MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl( |
| const MCAssembler &Asm, const MCSymbol &SymA, const MCFragment &FB, |
| bool InSet, bool IsPCRel) const { |
| const MCSection &SecA = SymA.getSection(); |
| const MCSection &SecB = *FB.getParent(); |
| // On ELF and COFF A - B is absolute if A and B are in the same section. |
| return &SecA == &SecB; |
| } |
| |
| void MCObjectWriter::addFileName(MCAssembler &Asm, StringRef FileName) { |
| FileNames.emplace_back(std::string(FileName), Asm.Symbols.size()); |
| } |