634e5c9204
add PowerPC Secure PLT support and enable Secure PLT by default for OpenBSD. from Brad (maintainer)
33 lines
1.1 KiB
Plaintext
33 lines
1.1 KiB
Plaintext
$OpenBSD: patch-lib_Target_PowerPC_PPCISelDAGToDAG_cpp,v 1.5 2018/11/17 08:32:38 ajacoutot Exp $
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[PowerPC] Secure PLT support
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Index: lib/Target/PowerPC/PPCISelDAGToDAG.cpp
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--- lib/Target/PowerPC/PPCISelDAGToDAG.cpp.orig
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+++ lib/Target/PowerPC/PPCISelDAGToDAG.cpp
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@@ -3894,6 +3894,24 @@ void PPCDAGToDAGISel::Select(SDNode *N) {
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return;
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break;
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+ case PPCISD::CALL: {
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+ const Module *M = MF->getFunction().getParent();
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+ if (PPCLowering->getPointerTy(CurDAG->getDataLayout()) != MVT::i32 ||
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+ !PPCSubTarget->isSecurePlt() || !PPCSubTarget->isTargetELF() ||
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+ M->getPICLevel() == PICLevel::SmallPIC)
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+ break;
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+ SDValue Op = N->getOperand(1);
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+ if (GlobalAddressSDNode *GA = dyn_cast<GlobalAddressSDNode>(Op)) {
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+ if (GA->getTargetFlags() == PPCII::MO_PLT)
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+ getGlobalBaseReg();
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+ }
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+ else if (ExternalSymbolSDNode *ES = dyn_cast<ExternalSymbolSDNode>(Op)) {
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+ if (ES->getTargetFlags() == PPCII::MO_PLT)
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+ getGlobalBaseReg();
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+ }
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+ }
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+ break;
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+
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case PPCISD::GlobalBaseReg:
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ReplaceNode(N, getGlobalBaseReg());
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return;
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