diff options
Diffstat (limited to 'lld/ELF/Relocations.cpp')
-rw-r--r-- | lld/ELF/Relocations.cpp | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/lld/ELF/Relocations.cpp b/lld/ELF/Relocations.cpp index 92f2e20..5527434 100644 --- a/lld/ELF/Relocations.cpp +++ b/lld/ELF/Relocations.cpp @@ -995,7 +995,8 @@ bool RelocationScanner::isStaticLinkTimeConstant(RelExpr e, RelType type, if (e == R_GOT || e == R_PLT) return target->usesOnlyLowPageBits(type) || !config->isPic; - if (sym.isPreemptible) + // R_AARCH64_AUTH_ABS64 requires a dynamic relocation. + if (sym.isPreemptible || e == R_AARCH64_AUTH) return false; if (!config->isPic) return true; @@ -1141,12 +1142,26 @@ void RelocationScanner::processAux(RelExpr expr, RelType type, uint64_t offset, (rel == target->symbolicRel && !sym.isPreemptible)) { addRelativeReloc<true>(*sec, offset, sym, addend, expr, type); return; - } else if (rel != 0) { + } + if (rel != 0) { if (config->emachine == EM_MIPS && rel == target->symbolicRel) rel = target->relativeRel; std::lock_guard<std::mutex> lock(relocMutex); - sec->getPartition().relaDyn->addSymbolReloc(rel, *sec, offset, sym, - addend, type); + Partition &part = sec->getPartition(); + if (config->emachine == EM_AARCH64 && type == R_AARCH64_AUTH_ABS64) { + // For a preemptible symbol, we can't use a relative relocation. For an + // undefined symbol, we can't compute offset at link-time and use a + // relative relocation. Use a symbolic relocation instead. + if (sym.isPreemptible) { + part.relaDyn->addSymbolReloc(type, *sec, offset, sym, addend, type); + } else { + part.relaDyn->addReloc({R_AARCH64_AUTH_RELATIVE, sec, offset, + DynamicReloc::AddendOnlyWithTargetVA, sym, + addend, R_ABS}); + } + return; + } + part.relaDyn->addSymbolReloc(rel, *sec, offset, sym, addend, type); // MIPS ABI turns using of GOT and dynamic relocations inside out. // While regular ABI uses dynamic relocations to fill up GOT entries @@ -1171,7 +1186,10 @@ void RelocationScanner::processAux(RelExpr expr, RelType type, uint64_t offset, // When producing an executable, we can perform copy relocations (for // STT_OBJECT) and canonical PLT (for STT_FUNC) if sym is defined by a DSO. - if (!config->shared && sym.isShared()) { + // Copy relocations/canonical PLT entries are unsupported for + // R_AARCH64_AUTH_ABS64. + if (!config->shared && sym.isShared() && + !(config->emachine == EM_AARCH64 && type == R_AARCH64_AUTH_ABS64)) { if (!canDefineSymbolInExecutable(sym)) { errorOrWarn("cannot preempt symbol: " + toString(sym) + getLocation(*sec, sym, offset)); |