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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.　　巡山队员在遍布危险的茫茫大戈壁上奋力追踪，终于，盗猎者出现在冰河对岸，队员们不顾一切地冲入湍急的冰河之中。一场生死搏斗之后，只捕获了一些盗猎分子， 狡猾的盗猎头子再次漏网……Lin Lu is not only mentally retarded, but also impolite. On one occasion, in class, Lin Nian was always making jokes and fidgeting. The teacher said, "Next to him, check if Lin Nian has diapers because the little BB without diapers is making shocks all day." Lin Nian said angrily, "You just wrap diapers! You are the little BB!"清嘉庆十五年，上承康、雍、乾三代盛世丰绩，再加恶吏和珅已诛，朝野内外一片升平景象。然而，嘉庆帝的后宫中，仍是一片千百年来了无休止的争斗光景，比诸于政坛上男人们的角逐，更见动魄惊心，血肉模糊。 此间，六宫之首虽为皇后钮钴禄氏，但得宠当道者，实为另一钮钴禄氏如妃。时值三年一届选秀入宫，秀女玉莹为贵族之后，姿色过人，遂成为同届佳丽针对对象。另有秀女尔淳，实乃内　　要在时装界出人头地，当中的艰苦外人难以明白；敏、菲及瑶为了理想选择咬紧牙关。力与敏相处日久，不自觉地擦出火花，令玲伤痛不已，决定接受力拍档罗祖耀(单立文)的追求……一张中奖彩票，打乱了在婚姻登记处工作的葛大伟（郭涛 饰）和陈小玲（胡静 饰）原本平淡无味的夫妻生活。在小姨子的鼓动下，他们找来几位朋友，开办了一家旨在帮助处于婚姻危机中的男女，解决他们的婚姻危机的爱情维修站。在葛大伟与同事们的共同努力下，他们挽救了一段又一段的婚姻，其间发生了许多啼笑皆非的故事。然而由于资产支配不当，他们的收入并没有随着事业的发展成正比增长。几单生意不仅没有赚到钱，而且把自己的全部积蓄都赔了进去。此时，长期存在于葛大伟和陈小玲之间的矛盾激化，陈小玲最终选择了离家出走。夫妻关系和事业同时走到绝境，葛大伟将如何走出双重困境…… 　　本片集结英达、蔡少芬、张晋、苑琼丹等众多明星加盟，惊喜不断，笑声连连。真爱也许在我们心中不再永恒，但是我们相信这样的爱情存在于天堂……