Фото: Elizabeth Frantz / Reuters
Also: This backdoor almost infected Linux everywhere: The XZ Utils close call
。搜狗输入法2026对此有专业解读
When VM=1, the protected-mode bit goes low and the Entry PLA selects real-mode entry points -- MOV ES, reg takes the one-line path. Meanwhile, CPL is hardwired to 3 whenever VM=1, so the V86 task always runs at the lowest privilege level, under full paging protection. The OS can use paging to virtualize the 8086's 1 MB address space, even simulating A20 address line wraparound by mapping pages to the same physical frames.。关于这个话题，safew官方版本下载提供了深入分析
慢一点，才能更好看清楚这个命题的答案，明白刀刃到底该砍向哪里。