diff options
Diffstat (limited to 'llvm/lib/MC/MCAssembler.cpp')
| -rw-r--r-- | llvm/lib/MC/MCAssembler.cpp | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/llvm/lib/MC/MCAssembler.cpp b/llvm/lib/MC/MCAssembler.cpp index d4d10e0..f1a82f6 100644 --- a/llvm/lib/MC/MCAssembler.cpp +++ b/llvm/lib/MC/MCAssembler.cpp @@ -398,6 +398,10 @@ bool MCAssembler::registerSymbol(const MCSymbol &Symbol) { return Changed; } +void MCAssembler::addRelocDirective(RelocDirective RD) { + relocDirectives.push_back(RD); +} + /// Write the fragment \p F to the output file. static void writeFragment(raw_ostream &OS, const MCAssembler &Asm, const MCFragment &F) { @@ -695,6 +699,27 @@ void MCAssembler::layout() { // helps check whether a PC-relative fixup is fully resolved. this->HasFinalLayout = true; + // Resolve .reloc offsets and add fixups. + for (auto &PF : relocDirectives) { + MCValue Res; + auto &O = PF.Offset; + if (!O.evaluateAsValue(Res, *this)) { + getContext().reportError(O.getLoc(), ".reloc offset is not relocatable"); + continue; + } + auto *Sym = Res.getAddSym(); + auto *F = Sym ? Sym->getFragment() : nullptr; + auto *Sec = F ? F->getParent() : nullptr; + if (Res.getSubSym() || !Sec) { + getContext().reportError(O.getLoc(), + ".reloc offset is not relative to a section"); + continue; + } + + uint64_t Offset = Sym ? Sym->getOffset() + Res.getConstant() : 0; + F->addFixup(MCFixup::create(Offset, PF.Expr, PF.Kind)); + } + // Evaluate and apply the fixups, generating relocation entries as necessary. for (MCSection &Sec : *this) { for (MCFragment &F : Sec) { |