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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.一九四五年七月，抗战胜利前夕，新四军军需处干部林虹，潜伏在北冰洋贸易商行做助理，暗中筹措军需品。商行老板查福鼎是苏州名流，靠收买国民党上层军官发国难财，影响恶劣，军统启用高级特工周玖决定秘密抓捕查福鼎。宋朝时期，蹴鞠运动，也就是足球远动风靡全国上下。国内有许多专业的球队，“太和楼”就是其中之一。球队的绝对主力柳复生（任泉 饰）背负着父亲的期待，视足球为第一要务。球队仪仗队成员月娥（李冰冰 饰）对复生暗生情愫，却被复生毫不留情的视为妹妹。一次偶然，月娥结识了很会踢球的烧饼小子张俊（李宗翰 饰），经过一番波折后，张俊也进入到了“太和楼”。但复生和张俊两人互看对方不顺眼，导致了一场重要比赛的失利。太和楼被丰乐楼收购，所有成员都需要经过选拔才能留下，复生和张俊陷入到了危机中。The company conducted a questionnaire, I found that people still agree with the questionnaire, All the things they usually don't want to say are written out in the questionnaire, and they can also express their dissatisfaction to their heart's content. I hope the company can carry out it every once in a while and listen to the most real thoughts of the employees of the company. It is better for the personnel department to distribute these things to the personnel department and collect them, thus eliminating all the links in the middle. Because we also have some bad things to do. If we collect them again, the cashier will not write down our questions when we think of these things that we can see. This is also a loss to the questionnaire.This part is much simpler. It is to find four elders, clear away the small monsters around them, and finally talk with them to rescue them successfully. The route and the position of the elders are shown in the figure. There is no need to follow the order. The yellow circle is the seat of the elders, walking along the red line, with a disk in the middle that can pass through four points.There are five events in equestrian, fencing, swimming, shooting and cross-country running, with one medal for men and one medal for women.或许内心之中曾经有过一段挣扎，毕竟这也算是一个很好的前途和机会。