callback to count number of instructions in uc_emu_start() should be executed first. fix #727

include/list.h

@@ -12,9 +12,19 @@ struct list {
     struct list_item *head, *tail;
 };
 
+// create a new list
 struct list *list_new(void);
+
+// removed linked list nodes but does not free their content
 void list_clear(struct list *list);
+
+// insert a new item at the begin of the list.
+void *list_insert(struct list *list, void *data);
+
+// append a new item at the end of the list.
 void *list_append(struct list *list, void *data);
+
+// returns true if entry was removed, false otherwise
 bool list_remove(struct list *list, void *data);
 
 #endif

include/uc_priv.h

@@ -244,6 +244,7 @@ struct uc_struct {
     uint32_t target_page_size;
     uint32_t target_page_align;
     uint64_t next_pc;   // save next PC for some special cases
+    bool hook_insert;	// insert new hook at begin of the hook list (append by default)
 };
 
 // Metadata stub for the variable-size cpu context used with uc_context_*()