jmp short 0x0导致永远循环 [英] jmp short 0x0 causing loop forever

问题描述

有人告诉我，转换为目标代码 xeb\xfe的指令 jmp short 0x0会导致一个过程永远循环。

I am told that the instruction "jmp short 0x0" which translates to the object code '\xeb\xfe' causes a process to loop forever. How exactly does this work?

推荐答案

这个问题看似模棱两可，但值得怀疑的是，原因是该指令会引起自己跳回去。 \xeb\xfe 的字面意思是从下一条指令的开头向前跳转-2个字节。由于该指令本身是2个字节长，因此跳转目标将是跳转指令本身。

This question seems disingenuous, but giving the benefit of the doubt, the reason is that the instruction will elicit a jump back to itself. \xeb\xfe translates literally to "Jump ahead -2 bytes from the start of the next instruction." Since this instruction is itself 2 bytes long, the jump destination will be the jump instruction itself.

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