fusee-cpp: add basic structural stubs

fusee_cpp/program/source/fusee_crt0.cpp

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <exosphere.hpp>
+
+extern "C" void __libc_init_array();
+
+namespace ams::nxboot::crt0 {
+
+    void Initialize(uintptr_t bss_start, uintptr_t bss_end) {
+        /* TODO: Collect timing information? */
+
+        /* Clear bss. */
+        std::memset(reinterpret_cast<void *>(bss_start),      0, bss_end - bss_start);
+
+        /* Call init array. */
+        __libc_init_array();
+    }
+
+}