For segments, the job is split between hardware and microcode. When LD_DESCRIPTOR fires its protection test at 5CD, the Test PLA OR's the A-bit (bit 8 of the descriptor high DWORD) into a temporary register called PROTUN. Then the microcode at PROT_TESTS_PASSED takes over and writes the modified value back to the GDT or LDT in memory:
union object_info *cursor[num_classes] = {0};，推荐阅读safew官方版本下载获取更多信息
，这一点在WPS官方版本下载中也有详细论述
Go to worldnews。关于这个话题，91视频提供了深入分析
Tony Jolliffe BBC