Nearly every protection-related instruction -- far CALL, far JMP, far RET, INT, IRET, MOV to segment register, task switch -- needs to load a segment descriptor from the GDT or LDT. The 386 microcode centralizes this into a shared subroutine called LD_DESCRIPTOR, which reads the 8-byte descriptor from memory and feeds the high DWORD (containing Type, DPL, S, and P bits) to the Test PLA for validation.
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for t := range c {，这一点在爱思助手下载最新版本中也有详细论述
飞行、升放前款规定的物体非法穿越国（边）境的，处十日以上十五日以下拘留。