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Display with AM/pmFigure 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.秦朝末年，朝廷无道，民不聊生。天下各路义军纷纷揭竿而起，反抗秦廷。其中以故楚名将项燕之后项梁、项羽叔侄势力最大。项梁以自己新立之楚怀王的名义，召集各路义军，联合伐秦。谁知刚一出师，项梁便在与秦将章邯作战时战死了。项羽随即接替了叔父的帅位，将义军分为两路攻秦。项羽的东路军在关东聚歼秦军主力；指挥西路军的“沛公”刘邦则乘隙攻入咸阳。依据楚怀王“先入定关中者王之”的约定，刘邦欲称王关中，便派兵驻守函谷关，以防诸侯入关。同时，他宣布废除秦朝苛政，与关中父老“约法三章”。项羽于巨鹿歼灭秦军主力，收服章邯，取得诸侯上将军的地位，并率诸侯联军四十万、秦军降卒二十万直奔关中。中途，项羽恐秦降卒哗变，在新安将他们全部坑杀。之后，项羽命英布攻破函谷关，进驻鸿门，意图消灭刘邦集团。刘邦自知不敌，于是竭力拉拢项羽的叔父项伯为其调解，并亲赴鸿门请罪。项羽被刘邦的诚意所打动，放弃了消灭刘邦的念头。之后，项羽凭借其在军事上的压倒优势，裂土分封十八位诸侯王，并自立为西楚霸王，定都彭城。封刘邦为汉中王，定都南郑。又将关中分为三部，封秦降将章邯、司马欣、董翳分别为王，企图通过他们控制关中，将刘邦困锁在边险地区。刘邦采纳张良、萧何的建议，确定了收用巴蜀，还定三秦，东向以争天下的方略。于是忍忿前往汉中就国。途中烧毁所过栈道，防止诸侯军偷袭，并借此表示自己无东向之意，以麻痹项羽。项羽亦于同时班师回彭城。不久后，未被项羽封王的田荣于齐地起兵反楚，自立为齐王，项羽发兵击齐。刘邦乘项羽无暇西顾和三秦王立足未稳之机，拜韩信为大将，统兵数万，明修栈道，暗渡陈仓，迅速还定三秦，袭占关中大部地区。项羽在两面受敌的情势下，采取先齐后汉方针，继续攻齐，主力被牵制在齐地。刘邦再度抓住战机，一面巩固关中，一面扩张势力，亲自率军出函谷关东进，并联络各地诸侯王，率联军五十六万，一举袭占楚都彭城。项羽大怒，留部将继续击齐，自率三万骑兵疾驰南下，乘刘邦陶醉于胜利，毫无戒备之际，以少胜多，大败汉军，收复彭城。刘邦仅率数十骑突出重围，逃回荥阳。此役，汉军被歼数十万，元气大伤。此后，项羽调集大军，与刘邦在荥阳、成皋一线开始了长达两年零五个月的相持战。此间，楚军北有韩信占据齐地威胁彭城，腹地有彭越游动作战，又须分兵南据九江，以致兵力分散，腹背受敌，粮草匮乏，欲战不能。刘邦则据荥阳、成皋之战坚守不战。于是项羽与刘邦订立和约“中分天下”，划鸿沟为界，东归楚、西属汉。之后，项羽遵约东撤，刘邦则背约向楚军发起突然追击，并约集韩信、彭越南下合围楚军于垓下。楚军缺兵少粮，屡战不胜。夜闻楚歌四起，军心瓦解。项羽率八百骑突围南逃，刘邦派兵追击。项羽逃至乌江，想起当年率八千子弟兵过江时的豪情，自觉无颜去江东父老，遂自刎。楚汉战争最终以刘邦的胜利宣告结束，大汉王朝也就此建立。4. One bar is Second Officer: the most elementary and inexperienced pilot in the cockpit; Responsible for shift work on long-distance flights; Only when the plane reaches the cruising altitude can it sit in the right driver's seat.Attack Speed +3% (Maximum: 5%)杨长帆却大喜起身，感谢国王的支持，未等其有反应，已然上前握手感激流涕，两国百年交好，同进同退。范文轩满意地点点头，笑道：巨鹿大战差不多结束了，让你哥哥恢复燕赵和草原的经营吧。