The main rule for data access is max(CPL, RPL) ≤ DPL. For code transfers, the rules get considerably more complex -- conforming segments, call gates, and interrupt gates each have different privilege and state validation logic. If all these checks were done in microcode, each segment load would need a cascade of conditional branches: is it a code or data segment? Is the segment present? Is it conforming? Is the RPL valid? Is the DPL valid? This would greatly bloat the microcode ROM and add cycles to every protected-mode operation.
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其次，大模型没有天然的执行能力，需要辅以智能体工程来将意图转化为实际操作。工具调用是当前最主流的方式，大模型根据任务需求，生成结构化的函数调用指令，由智能体框架解析后执行相应操作，比如调用天气API、数据库查询、发送邮件等；另一种方式是模拟人类操作，通过视觉识别和模拟操作来"看屏幕、点按钮、填表单"来完成任务，近期大火的豆包手机就是这样完成智能体操作；对于更复杂的任务，智能体还可以配置代码解释器（Code Interpreter / Sandbox），让模型编程运行，这可以极大的扩展智能体的行动边界。