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View Code? Open in Web Editor NEWmit 6.828 2018，JOS实现
Home Page: https://pdos.csail.mit.edu/6.828/2018/index.html
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lab3的相关问题
你好，我在写lab3的时候总是会运行失败：kernel panic at kern/pmap.c:165: PADDR called with invalid kva 00000000 。这对应的语句是
kern_pgdir = (pde_t *) boot_alloc(PGSIZE);
memset(kern_pgdir, 0, PGSIZE);
用GDB调试的时候发现kern_pgdir的值会放在boot_alloc分配的一页里，然后memset把它清零0.
不知道是不是gcc的原因，请教下你当时做这个实验时的配置以及是否出现过此问题。
另外我clone你的代码测试lab3的时候出现了我相同的问题。
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