然后就可以使用这个返回的指针来配置这个虚拟文件的其他参数，例如在对该文件执行读操作时应该调用的函数。
You can then use the return pointer to configure other aspects of the virtual file, such as the function to call when a read is performed on the file.
Vega处理器包含了一个客户化的读屏障指令，它具有字段检查元数据和针对GC压缩页面的特殊的虚拟内存保护。
Vega processors included a custom read barrier instruction that included bit field checking in reference metadata as well as special virtual memory protection for GC-compacted pages.
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