mappoint 2018

2018-2019-1 20165334 "Fundamentals of Information Security system Design" Third week study summary and Buffer Overflow Vulnerability experiment One, instruction learning gcc -Og -o xxx.c learns to -Og tell the compiler to use an optimization level that generates machine code that conforms to the overall structure of the original C language code. gcc -Og -S xxx.cLearning ( -S option to view compiled code generated by the C language compiler) gcc -Og -c

T1 (binary search)Test instructionsGiven a sequence, the number of non-empty sets, which can be divided into equal two copies, is obtained.namely [Usaco2012 open]balanced Cow subsets;Data range NTransform the model to know that there are only 3 cases for each number,1, not be selected;2, is selected into the left set;3, is selected to the right set.If the violence enumerates all the possible 3^n will obviously time out,So we can use meet in the middle idea, namely binary search.Enumerate to the

TopicA. Elevator or stairs?DescriptionMasha to go from the X-storey to the Y-floor to find Egor, you can choose to climb stairs or take a helicopter elevator. It is known that climbing stairs each layer needs time T1; The helicopter elevator each floor needs time T2, the helicopter elevator opens or closes once needs the time T3, the current helicopter elevator in the z floor, the helicopter elevator door is in the closed state. If the total time to climb stairs is strictly less than the helicop

non-gate or non-gate HCL integer Expression Case Expression Format: [ select 1: expr 1 select 2: expr 2 . select k: expr k ] Set Relationship:iexp in{ iexp1,iexp2,...iexpk } Arithmetic/logic unit (ALU) Sequential implementation of Y86-64 Organize the processing into stages Value fetch--> decoding decode--> performing execute--> memory--> writeback write back write back--> update PC update SEQ

week's exam error summary 1.The following jump commands are related to ZF ()A. jmpB. JeC. jsD. JaE. JBF. JbeAnalytical:2.Assuming that the function of the C-expression T=a+b is completed with the add instruction, the correct statement about the condition Code Register is ()A. If t==0, then zf=1B. If tC. If tD. if (aE. if (aF. LEAQ directive does not affect the condition code registerG. CMP directives do not affect the condition code registerAnalysis: Textbook p135ZF: 0 logo. The result of the r

I. Learning Objectives Understanding the role of ISA abstraction Master Isa, and be able to learn other architecture extrapolate Understanding the pipeline and how it is implemented Second, the Learning content y86-64 directive MOVQ directive IRMOVQ rrmovq mrmovq RMMOVQ Four integer manipulation instructions Addq,subq,andq,xorq only the Register data 7 Jump Instructions Cmovle cmovl cmove cmovne cmovge CMOVG The call command returns the address to the stack, and then j

1.Y86-64 Instruction Set architecture①Y86-64 directive MOVQ directive IRMOVQ rrmovq mrmovq RMMOVQ Four integer manipulation instructions Addq,subq,andq,xorq only the Register data 7 Jump Instructions Cmovle cmovl cmove cmovne cmovge CMOVG The call command returns the address to the stack, and then jumps to the destination address, and the RET instruction returns from such calls Pushq and POPQ instructions are implemented into the stack and out of the stack Execution of Halt

Planned CMS, eventually did not complete, in the middle of the mess, docking, and found, the URL will pass the + number, which will lead to the identification of space problems.A new WCF service Wxaidishserverice is opened for other development.The database inside remember to open aidish configuration.A new configuration for upaidish is also needed. Used to turn on upload configuration.Should be web-> a bunch of WCF services,Later, it will be changed into a bunch of web->orleans clusters, a port

the page is fully downloaded and then loaded. So sometimes browsing @import loading CSS page when there will be no style (that is, flashing), the speed of the slow time is quite obvious.The difference when using the DOM to control styles. When you use JavaScript to control the DOM to change the style, only the link tag is used, because @import is not controlled by the DOM (not supported).Q: An HTTP request structure? (Request header Parameter)A:Q: A page from the input URL to the page load disp

the chessboard is the upper left corner, the matrix of all the grid color from black to white, from white to black. I can't find a man with a black lattice to lose. Unusually, because small H and small c are good friends, Little H wants to make it as small C as possible to win. and small c is a competitive person, he wants to win as much as possible. Then on this basis, small H initiator, who can win it. "Input"? The first line is an integer t, which indicates that there is a T group of data. T

.51cto.com 51CTO, one of the platform for technology managers, is committed to providing technology leaders in the industry with knowledge learning and value growth, emphasizing technical managers ' "technical vision" and "commercial vision", enhancing technical decision-making, commercial knowledge and leadership , with the industry's senior technical executives, technology founders, investors and other participants in the course content design and teaching, to help China's most potential techn

DescriptionInputLine 1th: 10 spaces separate integers: N, A, B, C, D, E, F, G, H, MOutputLine 1th: The remainder of the total modulus m of the N-head cows that satisfy the lightest and the highest of the overall weight.Sample Input2 0 1 5 55555555 0 1 0 55555555 55555555Sample Output51HINTSample Description: The weight and usefulness of the formula were: Weight: 5, 6, 9, 14, 21, 30 useful degrees: 0, 1, 8, 27, 64, 125.Violence can be too series#include #includeusing namespacestd;structna{Long Lo

The first time to participate in the ICPC competition, but also the first medal, although only copper, but in fact, the taxi has been very good, a little close to be able to touch the silver.Before participating in the provincial race, to become the only one of our school did not win the team, in fact, there have been some heart knot, and this time and the new team-mates, although the strength of the new players than the previous teammates rob a lot, but the total feeling of cooperation has been

Why do I open a blog Park? Right? I also want to ask myself this question. I think, it's just for the sake of anxiety. As for my small goal, I have been striving for it. One thing is to make yourself to strong and better strong. Learning is a continuous process. Due to the confusion of learning knowledge, I think it is necessary to sort out my learning knowledge system. First, I want to give my mind an everlasting thought, and second, I want to summarize, summarize, and sort out my learning kno

used to assign values to bytes in the buffer zone. ESI needs to be set as the buffer address, EDI is set as the destination buffer address, and ECx must be the length to be copied. It will be copied by byte until ECx = 0. Rep scasb is used to search for a byte in a data buffer. EDI must point to the buffer address, and Al contains the bytes to be searched. ECx is set to the buffer length. When ECx = 0 or this byte is found, the comparison is stopped. 20