EVT) const {
return false;
}
+
+Value *AArch64TargetLowering::getSafeStackPointerLocation(IRBuilder<> &IRB) const {
+ if (!Subtarget->isTargetAndroid())
+ return TargetLowering::getSafeStackPointerLocation(IRB);
+
+ // Android provides a fixed TLS slot for the SafeStack pointer. See the
+ // definition of TLS_SLOT_SAFESTACK in
+ // https://android.googlesource.com/platform/bionic/+/master/libc/private/bionic_tls.h
+ const unsigned TlsOffset = 0x48;
+ Module *M = IRB.GetInsertBlock()->getParent()->getParent();
+ Function *ThreadPointerFunc =
+ Intrinsic::getDeclaration(M, Intrinsic::aarch64_thread_pointer);
+ return IRB.CreatePointerCast(
+ IRB.CreateConstGEP1_32(IRB.CreateCall(ThreadPointerFunc), TlsOffset),
+ Type::getInt8PtrTy(IRB.getContext())->getPointerTo(0));
+}