What is striking about this implementation is that it does not involve CR0.WP. The implementation elegantly sidesteps this by exploiting the fact that it is under no obligation to access memory via the pointer it receives from userspace. Since the kernel is in complete control of virtual memory, it can simply remap the physical frame into its own virtual address space, with arbitrary permissions, and operate on it as it wishes.
Zaid Harchaoui, University of Washington
，这一点在搜狗输入法与办公软件的高效配合技巧中也有详细论述
3 апреля 2026, 00:50 Международные события
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