作者gn01642884 (领域中人)
看板Grad-ProbAsk
标题[理工] [作业系统]system call
时间Sat Dec 12 15:02:06 2009
Which event are not occurred when an application makes a system call?
(A)the CPU mode is changed from user mode to system mode
(B)this application is temporary suspended
(C)the service routune in OS is invoked
(D)the parameters may be passed by registers or a memory block with
the starting address in a register
答案是Ｂ...完全不懂为什麽
我觉得以上四个答案都对说...
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1F：推 MARGHT:我想是不是因为他只是降到kernel mode去执行，而不是停止！ 12/15 02:54