| 1 | //===- lib/MC/MCObjectWriter.cpp - MCObjectWriter implementation ----------===// |
|---|
| 2 | // |
|---|
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
|---|
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
|---|
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
|---|
| 6 | // |
|---|
| 7 | //===----------------------------------------------------------------------===// |
|---|
| 8 | |
|---|
| 9 | #include "llvm/MC/MCObjectWriter.h" |
|---|
| 10 | #include "llvm/MC/MCExpr.h" |
|---|
| 11 | #include "llvm/MC/MCFragment.h" |
|---|
| 12 | #include "llvm/MC/MCSymbol.h" |
|---|
| 13 | namespace llvm { |
|---|
| 14 | class MCSection; |
|---|
| 15 | } |
|---|
| 16 | |
|---|
| 17 | using namespace llvm; |
|---|
| 18 | |
|---|
| 19 | MCObjectWriter::~MCObjectWriter() = default; |
|---|
| 20 | |
|---|
| 21 | bool MCObjectWriter::isSymbolRefDifferenceFullyResolved( |
|---|
| 22 | const MCAssembler &Asm, const MCSymbolRefExpr *A, const MCSymbolRefExpr *B, |
|---|
| 23 | bool InSet) const { |
|---|
| 24 | // Modified symbol references cannot be resolved. |
|---|
| 25 | if (A->getKind() != MCSymbolRefExpr::VK_None || |
|---|
| 26 | B->getKind() != MCSymbolRefExpr::VK_None) |
|---|
| 27 | return false; |
|---|
| 28 | |
|---|
| 29 | const MCSymbol &SA = A->getSymbol(); |
|---|
| 30 | const MCSymbol &SB = B->getSymbol(); |
|---|
| 31 | assert(!SA.isUndefined() && !SB.isUndefined()); |
|---|
| 32 | if (!SA.getFragment() || !SB.getFragment()) |
|---|
| 33 | return false; |
|---|
| 34 | |
|---|
| 35 | return isSymbolRefDifferenceFullyResolvedImpl(Asm, A: SA, B: SB, InSet); |
|---|
| 36 | } |
|---|
| 37 | |
|---|
| 38 | bool MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl( |
|---|
| 39 | const MCAssembler &Asm, const MCSymbol &A, const MCSymbol &B, |
|---|
| 40 | bool InSet) const { |
|---|
| 41 | return isSymbolRefDifferenceFullyResolvedImpl(Asm, SymA: A, FB: *B.getFragment(), InSet, |
|---|
| 42 | IsPCRel: false); |
|---|
| 43 | } |
|---|
| 44 | |
|---|
| 45 | bool MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl( |
|---|
| 46 | const MCAssembler &Asm, const MCSymbol &SymA, const MCFragment &FB, |
|---|
| 47 | bool InSet, bool IsPCRel) const { |
|---|
| 48 | const MCSection &SecA = SymA.getSection(); |
|---|
| 49 | const MCSection &SecB = *FB.getParent(); |
|---|
| 50 | // On ELF and COFF A - B is absolute if A and B are in the same section. |
|---|
| 51 | return &SecA == &SecB; |
|---|
| 52 | } |
|---|
| 53 | |
|---|
