Amazon Echo Spot — 49.99美元（原价79.99美元，省30美元）🔥
Изображение: M. Schuppich / Shutterstock / Fotodom
。关于这个话题，whatsapp网页版提供了深入分析
static int run_completed_file_jobs(JSContext *ctx)
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.