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.
Untrusted Code ─( ~340 syscalls )─→ Host Kernel，这一点在快连下载安装中也有详细论述
，详情可参考WPS下载最新地址
德索托的理论并非纸上谈兵。他曾亲自参与秘鲁的改革，而且一度取得显著效果。
It meant Collins and her crew would make it safely home.，更多细节参见WPS下载最新地址