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Figure 1 is an example of a JOP attack. In this example, the attacker's aim is to execute a system call "int 0x80" to open a new command line window. To do this, an attacker needs to modify the contents of the eax register to "0x0000000b" and the ebx register to the string "/bin/sh" before "int 0x80" is called, and the ecx and edx registers must point to the value "0x00000000". Suppose the value "0x0000000" and the string "/bin/sh" can be found in memory when the program is running. An attacker needs to construct the value "0x0000000b" himself. However, for the value "0x0000000b", when an attacker saves data to the stack through a buffer overflow, the "0x00" byte will trigger the system to terminate the read operation. This example specifically describes how the attacker uses the existing code snippet in the program to modify the value of val pushed into the stack by the attacker step by step from "0xffffff0b" to the value required by the system call "0x0000000b", thus implementing JOP attack. The following are the detailed steps of the process.影片讲述了一群凶猛的女囚犯挣脱出来逃跑的故事。约翰·库珀（johncooper）在背部手术康复后回到了工作岗位，并见到了他的新搭档唐洁西卡（Jessica Tang）警官，她是一名坚强、纪律严明的警察，身上带着自己在街上工作的行李。莉迪亚的新搭档是鲁本·罗宾逊，她似乎无法逃脱帮助一位不愿留在安全地带的前CI。本、萨米和杜威追着一名持枪男子进了一所小学，而本却与一名态度强硬的街头警察碰头，后者的玩世不恭的态度影响了他们的工作。Getting the manual does not mean that you have the guidelines, just like storing a lot of books, it does not necessarily mean that you will become a learned person.能透露一下，有什么后果？陈启不由笑着问道。