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View Code? Open in Web Editor NEW计算机相关知识的笔记
计算机相关知识的笔记
opensbi应该是从firmware/fw_base.S
的_start
标记开始执行的。从_start
执行不久就调用到了fw_boot_hart
,在fw_boot_hart
里没有初始化a2
寄存器就直接使用了它的值,这表明在_start
之前这些寄存器的值就有被初始化。那么在_start
之前这些寄存器的值是多少,它们是在哪里被初始化的?
2.4内核后默认编译tun/tap模块。为什么在ubuntu下使用modinfo tun
却提示找不到模块呢?且modprobe tun
无效。
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