Index: llvm/lib/ExecutionEngine/Orc/LLJIT.cpp
===================================================================
--- llvm/lib/ExecutionEngine/Orc/LLJIT.cpp
+++ llvm/lib/ExecutionEngine/Orc/LLJIT.cpp
@@ -143,6 +143,9 @@
         JITEvaluatedSymbol(pointerToJITTargetAddress(this),
                            JITSymbolFlags::Exported);
     StdInterposes[J.mangleAndIntern("__lljit.cxa_atexit_helper")] =
+        JITEvaluatedSymbol(pointerToJITTargetAddress(registerCxaAtExitHelper),
+                           JITSymbolFlags());
+    StdInterposes[J.mangleAndIntern("__lljit.atexit_helper")] =
         JITEvaluatedSymbol(pointerToJITTargetAddress(registerAtExitHelper),
                            JITSymbolFlags());
 
@@ -190,6 +193,14 @@
         GlobalValue::HiddenVisibility, "__lljit.run_atexits_helper",
         {PlatformInstanceDecl, DSOHandle});
 
+    auto *IntTy = Type::getIntNTy(*Ctx, sizeof(int) * CHAR_BIT);
+    auto *AtExitCallbackTy = FunctionType::get(VoidTy, {}, false);
+    auto *AtExitCallbackPtrTy = PointerType::getUnqual(AtExitCallbackTy);
+    addHelperAndWrapper(*M, "atexit",
+                        FunctionType::get(IntTy, {AtExitCallbackPtrTy}, false),
+                        GlobalValue::HiddenVisibility, "__lljit.atexit_helper",
+                        {PlatformInstanceDecl, DSOHandle});
+
     return J.addIRModule(JD, ThreadSafeModule(std::move(M), std::move(Ctx)));
   }
 
@@ -413,16 +424,25 @@
         .takeError();
   }
 
-  static void registerAtExitHelper(void *Self, void (*F)(void *), void *Ctx,
-                                   void *DSOHandle) {
+  static void registerCxaAtExitHelper(void *Self, void (*F)(void *), void *Ctx,
+                                      void *DSOHandle) {
     LLVM_DEBUG({
-      dbgs() << "Registering atexit function " << (void *)F << " for JD "
+      dbgs() << "Registering cxa atexit function " << (void *)F << " for JD "
              << (*static_cast<JITDylib **>(DSOHandle))->getName() << "\n";
     });
     static_cast<GenericLLVMIRPlatformSupport *>(Self)->AtExitMgr.registerAtExit(
         F, Ctx, DSOHandle);
   }
 
+  static void registerAtExitHelper(void *Self, void *DSOHandle, void (*F)()) {
+    LLVM_DEBUG({
+      dbgs() << "Registering atexit function " << (void *)F << " for JD "
+             << (*static_cast<JITDylib **>(DSOHandle))->getName() << "\n";
+    });
+    static_cast<GenericLLVMIRPlatformSupport *>(Self)->AtExitMgr.registerAtExit(
+        reinterpret_cast<void (*)(void *)>(F), nullptr, DSOHandle);
+  }
+
   static void runAtExitsHelper(void *Self, void *DSOHandle) {
     LLVM_DEBUG({
       dbgs() << "Running atexit functions for JD "
@@ -450,12 +470,12 @@
     auto *IntTy = Type::getIntNTy(*Ctx, sizeof(int) * CHAR_BIT);
     auto *VoidTy = Type::getVoidTy(*Ctx);
     auto *BytePtrTy = PointerType::getUnqual(Int8Ty);
-    auto *AtExitCallbackTy = FunctionType::get(VoidTy, {BytePtrTy}, false);
-    auto *AtExitCallbackPtrTy = PointerType::getUnqual(AtExitCallbackTy);
+    auto *CxaAtExitCallbackTy = FunctionType::get(VoidTy, {BytePtrTy}, false);
+    auto *CxaAtExitCallbackPtrTy = PointerType::getUnqual(CxaAtExitCallbackTy);
 
     addHelperAndWrapper(
         *M, "__cxa_atexit",
-        FunctionType::get(IntTy, {AtExitCallbackPtrTy, BytePtrTy, BytePtrTy},
+        FunctionType::get(IntTy, {CxaAtExitCallbackPtrTy, BytePtrTy, BytePtrTy},
                           false),
         GlobalValue::DefaultVisibility, "__lljit.cxa_atexit_helper",
         {PlatformInstanceDecl});