coursera edx

functions are slightly different from the previous ones. The print function appears virtual before. However, this virtual has played a huge role. It is no exaggeration to say that, without virtual functions, there is basically no design pattern, which cannot reflect the great superiority of the C ++ language in object-oriented design. Let's take a look at how this virtual works? 76: employee p; 0040128D lea ecx, [ebp-10h] 00401290 call @ ILT + 45 (employee: employee) (00401032) 00401295 mov d

, for a loop statement, the%EBX value is increased by 1, and when%EBX is no more than 5 o'clock, repeat the process, i.e.%ebx=%ebx+1;%eax=%ebx+1,%eax=%eax* the value of the previous validated number, comparing the%EAX to the value currently being validatedTherefore the first value is 1, the second value should be (+) *1=2, the third value is (2+1) *2=6, the fourth value is (3+1) *6=24, the fifth value is (4+1) *24=120, and the sixth value is (5+1) *120=720. Phase_3 Phase_3 also cal

And the list of awesome-* series Bayandin/awesome-awesomeness GitHub sqlmap! goagent! Yes, there's shadowsocks!. Open EdX Open EdX is committed to creating a powerful and flexible, open and large-scale online classroom platform. Also used to study learning and distance education After graduation, the most familiar thing is this project. Tall may not be, technically not stunning, after all, is busine

0x10ce28462 Ten: Pushq%r12 0x10ce28464 A: Pushq%rbx 0x10ce28465 -: Pushq%rax 0x10ce28466 -: Movq%rdi,%RBX 0x10ce28469 -: Xorl%eax,%eax 0x10ce2846b +: Testq%rbx,%RBX 0x10ce2846e A:JE0x10ce28534;0x10ce28474 -: Leaq 0x8 (%RBX),%RCX 0x10ce28478 +: Testl $0x1000000, 0x8 (%RBX) 0x10ce2847f the:jne0x10ce284db;0x10ce28481 A: Testl $0x8000000, (%RCX) 0x10ce28487 -:jne0x10ce284f8;0x10ce28489 the: Testl $0x10000000, (%RCX) 0x10ce2848f -:jne0x10ce28531;0x10ce28495 A: Movb 0xbad (%rip),%al;ISG

:00440f2c |. 8b45 FC MOV eax,dword PTR ss:[ebp-4]00440f2f |.BA 14104400 MOV edx,crackme3.00441014; ASCII "Registered User"00440f34 |.E8 F32BFCFF call crackme3.00403b2c; The key is to go with F7.00440f39 |.JNZ short crackme3.00440f8c; This is the end of the jump.00440f3b |. 8d55 FC LEA edx,dword PTR ss:[ebp-4]00440f3e |. 8b83 C8020000 MOV eax,dword PTR Ds:[ebx+2c8]00440f44 |. E8 D7FEFDFF Call Crackme3.00420e

: 0040823co. Text: 00408284. Text: 00408284 m_l_table = dword ptr-58 h. Text: 00408284 m_ B = DWORD PTR-18 h. Text: 00408284 M_a = dword ptr-14 h. Text: 00408284 m_k = dword ptr-10 h. Text: 00408284 m_j = dword ptr-0ch. Text: 00408284 m_ I = DWORD PTR-8. Text: 00408284 l_key = dword ptr-4. Text: 00408284. Text: 00408284 push EBP. Text: 00408285 mov EBP, ESP. Text: 00408287 add ESP, 0ffffffa8h. Text: 0040828a mov [EBP + l_key], eax. Text: 0040828d mov eax, [EBP + l_key]. Text: 00408290 mov ECx, [

program writer's quality decision.The inline assembly is passed in C + +The results of the actual discovery of 500W data are as follows:Algorithm name inline assembly algorithm time C + + algorithm timeBubble sort 5W Data slow dying 5W data slow to deathQuick sort 600ms about 500ms around------------------Why there is a fast sorting algorithm, the results of the assembly is not a C + + efficiency is high, because I write the inline assembly is not automatically generated by the compiler high ef

the quality of the high and low decision. Inline assembly is passed in C + + actually found the 500W data sorting results are as follows: Algorithm name inline assembler algorithm time C + + algorithm time Bubble sort 5W data slow to die 5W data slowly dying. Quick sort 600ms about 500ms around ------------------Why there is a fast sorting algorithm, the compiled results are not as high as C/s + + efficiency, because I write inline assembly without compiler automatic generation of high efficien

NTGODMOD.004030B4 00403265 98384000 PUSH ntgodmod.00403898; ASCII "Usage:" 0040326A 8d55 E4 LEA edx,dword PTR ss:[ebp-1c] 0040326D 33c0 XOR Eax,eax 0040326F E8 f8f0ffff Call ntgodmod.0040236c 00403274 8b45 E4 MOV eax,dword PTR ss:[ebp-1c] 00403277 8d55 E8 LEA edx,dword PTR ss:[ebp-18] 0040327A E8 11f4ffff Call ntgodmod.00402690 0040327F FF75 E8 PUSH DWORD PTR ss:[ebp-18] 00403282 A8384000 PUSH ntgodmod.004

body | ---------> @ 2|------> | -------------------- +|| Decryptor || ---------> @ 3+ -------------------- +@ 1 is a call constructed by computation, because the call location must be determined by @ 2.@ 2 is an encrypted virus.@ 3 is an encryptor used to decrypt @ 2, which is transformed by code obfuscation.In this way, every time other files are infected, the re-generated code will no longer have a fixed feature, which will invalidate the feature scanning mechanism. 2.1 random number design:T