vm: add macro for allocating and initialising C++ objects

include/socks/vm.h

@@ -50,6 +50,7 @@ typedef enum vm_prot {
 } vm_prot_t;
 
 typedef enum vm_flags {
+	VM_NORMAL  = 0x00u,
 	VM_GET_DMA = 0x01u,
 } vm_flags_t;
 
@@ -294,4 +295,18 @@ extern size_t vm_page_get_pfn_sparse(vm_page_t *pg);
 }
 #endif
 
+#ifdef __cplusplus
+inline void *operator new(size_t count, void *p) { return p; }
+
+#define kmalloc_object(objtype, flags, ...)        \
+        __extension__({                            \
+	void *p = kmalloc(sizeof(objtype), flags); \
+	if (p) {                                   \
+		new (p) objtype(__VA_ARGS__);      \
+	}                                          \
+	(objtype *)p;                              \
+	})
+
+#endif
+
 #endif