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We know that in x64, the first six parameters of the function are stored in RDI, RSI, RDX, RCX, R8 and R9 registers in turn. If there are more parameters, they will be stored on the stack. Therefore, in order for the computer to run the commands we want, we need to find a way to put the address of "/bin/sh" into RDI so that the machine can execute the system function. After carefully examining the linux function stack structure, we can find that we can use RAX register to put the system () address into RAX, then look for code fragments with JMP rax to make use of, and at the same time use RDI register to pass the parameter "/bin/sh" to finally achieve the attack purpose.剧照 (2张)立夏和发小七七考入浅川一中，认识了传说中的傅小司和陆之昂，随着遇见等人的加入，正式拉开了属于他们的青春美好的高中生活。毕业后，成人世界的门向他们敞开，每个人都过上了千差万别的生活。傅小司发行画集，红遍了全中国。立夏成为了傅小司的助手兼另一半。七七参加歌唱比赛夺冠，成为全中国的青春偶像。为了成为歌手而北漂的遇见，依旧在为梦想坚持。在每个人都被急速到来的世界冲撞得看不清未来的时候，更大的逆境接踵而至，几乎完全逆转并影响了每个人的人生：傅小司的坎坷、立夏的离开、陆之昂的入狱、程七七的背叛、遇见男友的去世。在离夏天最远的地方，十年的光阴让人发现，除了记忆外，什么也不能永久，但他们都学会了爱和成长。　　此剧采用一剧上下两部的形式，上半部剧的主题是＇贝塔项目＇，讲述2017年外星人题材的奇幻悬疑故事。As mentioned above, SYN attacks can be prevented by increasing the backlog queue. In addition, reducing timeout time also enables the system to process more SYN requests. We know that the timeout timeout, that is, the half-connection lifetime, is the sum of the timeout times that the system waits for all retransmissions. The larger this value, the longer the half-connection takes up the backlog queue and the fewer SYN requests the system can handle. In order to shorten the timeout time, it can be realized by shortening the retransmission timeout time (usually the first retransmission timeout time) and reducing the number of retransmissions.　　他高人一等，又低人一頭，活了一世 他卻千秋萬載。1. HTTP flood attack