tableau edx

Organize from the Internet Eax, EBX, ECx, EDX, ESI, EDI, EBP, ESP, etc. are the names of General registers on the CPU in x86 assembly language, and are 32-bit registers. These registers can be viewed as variables in C language. For example: Add eax,-2; // it can be considered to be a value such as-2 added to the variable eax. These 32-bit registers have multiple purposes, but each of them has "expertise" and has its own special features. Eax is the ac

Assume is s a string of lower case characters.Write A program This prints the longest substring of in s which the letters occur in alphabetical order. For example, if s = ‘azcbobobegghakl‘ , then your program should printLongest substring in

The analysis of the tableau's own DLL, which is not difficult to judge from its loaded Qt library, is developed using QT. Therefore, it has the function of easy transplanting. See the Internet has a public SDK, so download to see, but very

; 2147483647) {$ v1 = floor ($ v1/2); $ v2 --;} $ V3 = $ v1 >>$ v2; // While ($ v3> 4294967295) $ v3 = $ v3-4294967296; Return $ v3; } Function fxr ($ v1, $ v2) { $ V3 = $ v1 ^ $ v2; While ($ v3> 4294967295) $ v3 = $ v3-4294967296; While ($ v3 Return $ v3; } Function z ($ var) { GLOBAL $ var; Print $ var. "=". $ var .""; } Function get_ch ($ url) { $ C1 = 0xE6359A60; $ C2 = 0x9E3779B9; $ Url = "info:". $ url; // Z ('URL '); // Uint $ _ eax, $ _ edi, $ _ ecx, $ _

ECx, dword ptr [dwmovenum]SHR eax, ClRETMovebitr endp; //////////////////////////////////////// ///////////////////////////Bin2dec proc pbin: DWORD ; Argument checkMoV eax, dword ptr [pbin]Test eax, eaxJZ @ exitPush ESIMoV ESI, eaxXOR eax, eaxXOR edX, EDXClD@@:LodsbTest Al, AlJZ finalflag; FinalCMP Al, 30 h; 0JZ isbinCMP Al, 31 H; 1JZ isbinJnz @ B Isbin:Add edX, EDXLea

key ReadFile is found, after reading the HID device data, what should I do? According to common sense, it is time to analyze and verify it. Indeed, my analysis is correct. Here is the key assembly code obtained at that time, because this article was written in a few months later, therefore, some content can only be recalled. After reading the code, you can fully understand the protocol. 004417B2. 8B0D D8CD9500 mov ecx, dword ptr ds: [95CDD8] // retrieves the high byte of the CH1-CH4004417B8. A3

virtual function, the main function reserves 8byte of space on the stack for object x to hold the vptr pointer and member variable i. The following is an assembly code for the constructor of x: ?? 0x@ @QAE @h@z PROC ; X::x, comdat _this$ = ecx ; 5 : X (int ii) { push ebp mov EBP, esp push ECX The purpose of the pressure stack ecx is to reserve 4byte of space mov DWORD PTR _THIS$[EBP] for this pointer (the first address of X object) , ecx; Store the this pointer

the software is the subscription related CD of the Computer newspaper in 2001. The protection at the time of 7.0 is very good. The latest version should be much better now...Okay, let's get started. The first step is to install it (attracting the nheader of the Wolf), and then enter a string for registration. An error dialog box is displayed, the error message "the registration code is incorrect and cannot be registered" is displayed ". Then let's use Fi to see what shell it uses. ASPack 2.001,

Virus program source code instance analysis-example code of CIH virus [2] can be referred to push eax; block table size Push edx; edx is the offset of the virus code block table Push esi; buffer address 　　 The total size of the merged virus code block and virus code block tables must be smaller than or equal to the unused space size. Inc ecx Push ecx; Save NumberOfSections + 1 　　 Shl ecx, 03 h; multiply by

ptr [ebx] movl (% ebx), % eaxIn the ATT assembly instruction, the operand extension instruction has two suffixes: One specifying the length of the source operand and the other specifying the length of the target operand. ATT's symbolic extension command is "movs", and the zero extension command is "movz""(Intel commands are" movsx "and" movzx "). Therefore, "movsbl % al, % edx" indicates the register alThe byte data is extended from byte to long, and

compiler will automatically expand a simple function like STD: reverse () in inline mode, the generated Optimization assembly code is as fast as version 1. // Version 3: Use STD: reverse to reverse a range, with high-quality code Void reverse_by_std (char * STR, int N) { STD: reverse (STR, STR + n ); } ======== What code will the compiler generate? Note: Viewing the compiled code generated by the compiler is certainly an important means of understanding program behavior, but never think tha

:16:error:bad instruction ' PUSHL%edi ' X86cpuid-elf.s:18:error:bad instruction ' Xorl%edx,%edx ' X86cpuid-elf.s:19:error:bad instruction ' PUSHFL ' X86cpuid-elf.s:20:error:bad instruction ' popl%eax ' X86cpuid-elf.s:21:error:bad instruction ' Movl%eax,%ecx ' X86cpuid-elf.s:22:error:bad instruction ' Xorl $2097152,%eax ' X86cpuid-elf.s:23:error:bad instruction ' PUSHL%eax ' X86cpuid-elf.s:24:error:bad instr

cccccccch004011b6 rep STOs dword ptr [EDI]41: A Ca (1 );004011b8 Push 1004011ba Lea ECx, [ebp-8]004011bd call @ ILT + 95 (A: a) (00401064)42: B CB (2 );004011c2 push 2004011c4 Lea ECx, [ebp-10h]004011c7 call @ ILT + 10 (B: B) (0040100f)43: c cc (3 );004011cc Push 3004011ce Lea ECx, [ebp-18h]004011d1 call @ ILT + 105 (C: C) (0040366e)44:45: A * P [3] ={ ca, CB, CC };004011d6 Lea eax, [ebp-8]004011d9 mov dword ptr [ebp-24h], eax004011dc Lea ECx, [ebp-10h]004011df mov dword ptr [ebp-20h], ECx004

push EAX; block table size push edx; edx is the offset of the Virus code block table push esi; buffer address 　　 Combined virus code block and Virus code block table must be less than or equal to the amount of space not used Inc ECX push ecx; Save numberofsections+1 　　 SHL ecx, 03h; multiply 8 push ecx; reserved virus block table space 　　 Add ecx, eax add ecx, edx