diff --git a/entry/ofw/interface.c b/entry/ofw/interface.c
index 7ac9395..2a88b43 100644
--- a/entry/ofw/interface.c
+++ b/entry/ofw/interface.c
@@ -2,8 +2,40 @@
 
 extern void (*ofw)();
 
-void* interpret(char* cmd, ...)
+void* interpret(char* cmd, int32_t* stack_args, int n_stack_args, int32_t* retaddr)
 {
+        struct
+        {
+                char* service;
+                int32_t n_args;
+                int32_t n_rets;
+                char* arg1;
+                int32_t argN[n_stack_args];
+                int32_t ret1;
+                int32_t retN[16];
+        } ofw_arg;
+
+        SERVICE("interpret", 10, 1+n_stack_args, 16);
+
+        ofw_arg.arg1 = cmd;
+
+        int i;
+        for (i = 0; i < n_stack_args; i++)
+        {
+                ofw_arg.argN[i] = stack_args[i];
+        }
+
+        ofw(&ofw_arg);
+
+        int32_t* addr = claim(retaddr, 17, 1);
+
+        *addr = ofw_arg.ret1;
+        for (i = 1; i < 17; i++)
+        {
+                addr[i] = ofw_arg.retN[i];
+        }
+
+        return addr;
 }
 
 void* set_callback(void* addr)
diff --git a/entry/ofw/tree.c b/entry/ofw/tree.c
index 784e885..a3ca984 100644
--- a/entry/ofw/tree.c
+++ b/entry/ofw/tree.c
@@ -246,7 +246,7 @@ int32_t package_to_path(phandle package, void* buf, int32_t buflen)
 
 }
 
-void* call_method(char* method, ihandle instance, int32_t* stack_args, int32_t n_stack_args)
+void* call_method(char* method, ihandle instance, int32_t* stack_args, int32_t n_stack_args, int32_t* retaddr)
 {
 	struct
 	{
@@ -273,7 +273,7 @@ void* call_method(char* method, ihandle instance, int32_t* stack_args, int32_t n
 
 	ofw(&ofw_arg);
 
-	int32_t* addr = claim((int32_t*)0x04000000, 17, 1);
+	int32_t* addr = claim(retaddr, 17, 1);
 
 	*addr = ofw_arg.ret1;
 	for (i = 1; i < 17; i++)