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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.当邪恶联盟的领导人威胁要摧毁一个叛军星球以获取其资源时，他的女儿别无选择，只能加入叛军一方，为正义而战。一段君与臣的无间风云，一场秋雨渐浓的相遇。深宫谍变，英雄联盟，相望相杀，相爱却难。1936年12月，西安事变爆发，国共两党关系微妙。军校即将毕业的地下党冉华被同学宁鹏飞泄露身份，招致祸端。未婚妻石莉为救冉华家破人亡，无奈与冉华之弟冉国上山落草。抗战爆发，冉华与宁鹏飞尽释前嫌，联手抗日。在此期间，邓梅爱上冉华，但冉华始终思念石莉，不为所动。抗战胜利，冉华与宁鹏飞因立场不同再生间隙，宁鹏飞女友、冉华之妹冉辛在内战中牺牲。全国基本解放，冉华率领先锋团挺进川渝，解放大西南。宁鹏飞受命留在武陵山，抵御解放军。石莉和冉国受到宁鹏飞蛊惑，对解放军产生误解。宁鹏飞伏击先锋团，邓梅受伤牺牲。冉华误以为这一切是石莉所为，几人展开一段错综纠结的恩怨情仇。几经磨难，石莉与冉华尽释前嫌，联手击败宁鹏飞的势力。宁鹏飞不甘失败，暗中在重庆启动爆炸计划。关键时刻，冉华与石莉、冉国联手，摧毁宁鹏飞的计划。何老将军向来嫉恶如仇、凶狠霸道，刚按捺下去的怒火噌地又升起，寒声问道：怎么？黎章小儿，可是对老夫处置不满？魏铜、钱明等人紧张极了，只有黎水，定定地望着黎章：师姐一定会没事的，她不像自己，她向来行事有分寸。章邯点头领命。对，就是这样。