rework structure

hifive1-vp/riscv-bldc-forced-commutation/bsp/libwrap/sys/_exit.c

@@ -0,0 +1,17 @@
+/* See LICENSE of license details. */
+
+#include <unistd.h>
+#include "platform.h"
+#include "weak_under_alias.h"
+
+void __wrap_exit(int code)
+{
+  const char message[] = "\nProgam has exited with code:";
+
+  write(STDERR_FILENO, message, sizeof(message) - 1);
+  write_hex(STDERR_FILENO, code);
+  write(STDERR_FILENO, "\n", 1);
+
+  for (;;);
+}
+weak_under_alias(exit);