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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Fast food workers in California are demanding employers sign a pledge reaffirming workers’ rights amid Immigration and Customs Enforcement (ICE) raids at workplaces across the US.
{ 34, 46, 48, 36, 25, 11, 13, 27 },。业内人士推荐heLLoword翻译官方下载作为进阶阅读