Descriptor attributes: The Type, DPL, S (system/user), and Present bits from the segment descriptor being loaded, held in a register called PROTUN. In a few cases, the Test PLA takes the 16-bit selector (segment register value) as input instead.
The modern, professional answer to this problem is the Trusted Execution Environment, or TEE.。业内人士推荐夫子作为进阶阅读
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Unconsumed bodies: Pull semantics mean nothing happens until you iterate. No hidden resource retention — if you don't consume a stream, there's no background machinery holding connections open.
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