kern/test: add wip qemu-virt board support to mesosphere

libraries/libstratosphere/source/init/init_libnx_shim.os.horizon.cpp

@@ -38,6 +38,8 @@ namespace ams {
 
     namespace init {
 
+        void InitializeSystemModuleBeforeConstructors();
+
         void InitializeSystemModule();
         void FinalizeSystemModule();
 
@@ -66,6 +68,9 @@ extern "C" void __libnx_initheap(void) {
 extern "C" void __appInit(void) {
     /* The very first thing all stratosphere code must do is initialize the os library. */
     ::ams::hos::InitializeForStratosphere();
+
+    /* Perform pre-C++ constructor init. */
+    ::ams::init::InitializeSystemModuleBeforeConstructors();
 }
 
 extern "C" void __appExit(void) {

libraries/libstratosphere/source/init/init_system_module.cpp

@@ -17,6 +17,10 @@
 
 namespace ams::init {
 
+    WEAK_SYMBOL void InitializeSystemModuleBeforeConstructors() {
+        /* This should only be used in exceptional circumstances. */
+    }
+
     WEAK_SYMBOL void InitializeSystemModule() {
         /* TODO: What should we do here, if anything? */
         /* Nintendo does nndiagStartup(); nn::diag::InitializeSystemProcessAbortObserver(); */