-void *emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset);
+void emu_call_handle_op(struct op_context *op_ctx);
+void *emu_do_mmap(unsigned int length, int prot, int flags, int fd, unsigned int offset);
+int emu_do_munmap(void *addr, unsigned int length);
+int emu_do_ioctl(int fd, int request, void *argp);