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Binary XML has aroused a lot of discussion. One reason is that relatively compact transmission formats are needed, especially for Web Services. The existing ready-to-use solution is compression. This tip illustrates how to use compression to prepare XML files for transmission in Web Services.In the discussion of XML, the view of binary XML has always been heard. Due to its traditional text and the rules required to make international texts more friendly, XML is very lengthy. The equivalent binar
three elements point. The decompiling of 00f57f60 address is as follows: Classsizeres staticobj; @ 0 00f57f60 push EBP 00f57f61 mov EBP, ESP 00f57f63 sub ESP, 0c0h 00f57f69 push EBX 00f57f6a push ESI 00f57f6b push EDI 00f57f6c Lea EDI, [ebp-0C0h] 00f57f72 mov ECx, 30 h 00f57f77 mov eax, 0 cccccccch 00f57f7c rep STOs dword ptr es: [EDI]
virtual function of the subclass is called through the constructor of the parent class, and this virtual function may fail to access data members of the subclass. Let's take a look at the compiled code generated by vc7.1 to easily understand this behavior. This is the c190 constructor: 01 000000fe0 push EBP 02 000000fe1 mov EBP, esp 03 000000fe3 sub ESP, 0cch 04 00426fe9 push EBX 05 00426fea push ESI 06 00426feb push EDI 07 00426fec push
By axis 2007-03-28 Http://www.ph4nt0m.org General jump address of windows in simplified Chinese: (2 k/XP/2K3) 0x7ffa45f3 JMP ECx \ xFF \ xe1 0x7ffa4967 jmp ebp \ xFF \ xe5 0x7ffa4a1b jmp ebx \ xFF \ xe3 0x7ffa6773 push EBX, retn \ x53 \ xc3 (0x7ffa6772 is pop EDX) 0x7ffd1769 -- 0x7ffd1779 JMP eax \ xFF \ xe0 0x7ffc01b0 pop ESI, retn \ x5e \ xc3 0x7ffa54cf 0x7ffaf780 JMP edX \ xFF \ xe2 7ffa1571 58 pop eax7ffa1572 BF 58c058c2 mov EDI, c258c0587ffa1
bug correction used in the code, see the article "GDI + for VCL basics-GDI + and VCL". (8.8.18)Data Type: Type // Image data structure compatible with the GDI + tbitmapdata Structure Timagedata = packed record Width: longword; // The image width. Height: longword; // Image Height Stride: longword; // The length of the scanned line of the image in bytes. Pixelformat: longword; // unused Scan0: pointer; // image data address Reserved: longword; // Reserved End; Pimagedata = ^ timaged
constant Stack (Stack Space ). Why does tail recursion achieve constant stack space? We use the famous fibonacci series as an example to illustrate this. The implementation method of the fibonacci series is generally like this. int FibonacciRecur (int n) {if (0 = n) return 0; if (1 = n) return 1; return FibonacciRecur (n-1) + FibonacciRecur (n-2);} but note that this implementation method is not tail recursion, because the last action of tail recursion must be called itself, the final action he
Before analyzing set_base in Linux, we defined; EAX is TSS0 offset address;ebx are kernel_base address 0x10000;ecx is Gdt_address;edi 0x20set_base:addl%ebx,%eax; EAX = eax + ebx = 0x10000 + TSS0 offset address addl%ecx,%edi; EDI = edi + ECX = gdt_address + Tss0_sel MOVW%ax, 2 (%edi
parameters are ejected, here is not, really strange!Then we'll track into the dark alley and see what he's done!37:int __stdcall fnstandardcall (int arg1, short arg2, char arg3, void *arg4): {00401200 push ebp00401201 MOV ebp,esp00401203 sub esp,50h00401206 push ebx00401207 push esi00401208 push edi00401209 Lea edi,[ebp-50h]0040120c mov ecx,14h00401211 mov eax,0cccccccch00401216 re P STOs DWORD ptr [Edi
convert the value in Edx:eax to a decimal output form string, which is familiar, as in the previous example!; For example: edx=0,eax=01234567h, the converted string is:; -> ' 19088743 ', 0OUTEDXEAX proc uses ebx esi edi,lpstringMOV edi,lpstring points to the address where the results are storedMOV esi,lpstringmov ecx,10 converted into decimal. While eax!=0 | | Edx!=0Push EAXMOV Eax,edxXOR Edx,edxdiv ECXMOV
: Manual construction Stack Practice-How to manually construct the call stack ============ first illustrate the characteristics of the stack with a few pictures to help you understand. 1. Stack to low address growth. 2. Press the data into the stack, in the case of the stack. 3. Read the full textView the command summary for the disassembly code of the function in windbg: Command ========== U. U $ip the two commands above are the same effect, and disassemble the 8 commands on the current $IP add
simple.The main function first calls ProcCommandLine () to analyze the command line, obtain the Service Group to be started, and then calls SvcHostOptions () to query the options of the Service Group and all services of the Service Group, use a Data Structure svcTable to save the DLL of these services and their services, call the PrepareSvcTable () function to create the SERVICE_TABLE_ENTRY structure, and direct all processing functions SERVICE_MAIN_FUNCTION to one of your own functions FuncSer
Article Title: linux memory management initialization. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. ENTRY (startup_32) /* * Set segments to known values. */ Cld Lgdt boot_gdt_descr-_ PAGE_OFFSET/* set the segment register */ Movl $ (_ BOOT_DS), % eax Movl % eax, % ds Movl % eax, % es Movl % eax, % fs Movl % eax, % gs /* * Clear BSS first so that there are
data members of the subclass.Let's take a look at VC7.1The generated assembly code can easily understand this behavior.This is the C190 constructor:01 00426FE0 push ebp 02 00426FE1 mov ebp,esp 03 00426FE3 sub esp,0CCh 04 00426FE9 push ebx 05 00426FEA push esi 06 00426FEB push edi 07 00426FEC push ecx 08 00426FED lea edi,[ebp+FFFFFF34h] 09 00426FF3 mov ecx,33h 10 00426FF8 mov eax ,0CCCCCCCCh 11 00426FFD rep
push edi 00402099 lea edi, [ebp-40h] 0040209C mov ecx, 10 h 004020A1 mov eax, 0 CCCCCCCCh 004020A6 rep stos dword ptr [edi] 252: return 0; 004020A8 xor eax, eax 253 :} 004020AA pop edi 004020AB pop esi 004020AC pop ebx 004020AD mov esp, ebp 004020AF pop ebp 004020B0 ret 250: static int process () 251 :{ 00402090 push
.686p. Model Flat,stdcallOption Casemap:noneInclude Windows.incInclude Kernel32.incInclude Masm32.incIncludelib "D:\vs\msvcrt.lib"Includelib Masm32.libIncludelib Kernel32.libprintf PROTO C:dword,:varargscanf PROTO C:dword,:vararg. DataHello db ' Hello ', 0A DWORD 5,4,30,2,1P byte '%s ', 0ahHint1 byte "Please enter 5 numbers:", 0ah,0Hint2 byte "like 5 2 3 1 4,", 0ah,0FMT byte "%d%d%d%d%d", 0ah,0Lin byte "function:%d", 0ah,0Edii byte "Before exchanging eax:%d,ebx:%d", 0ah,0Edia byte "After exchang
issue CCDebuger has been very clear. If you have any questions, read the article. We directly open the RUN trace, add the "entry to all function processes", and return to the "Check" button in the program. In this case, open the RUN trace record in OllyDBG to find the key location, then you can break down at this position. The program is broken here.004010E2 |. 8BFE mov edi, ESIUser name is sent to edi004010E4 |. 03F8 add
PUSH; Gptr00404120 FFD0 call EAX; Request 800 bytes00404122 8905 CA404000 MOV DWORD PTR ds:[4040ca],eax00404128 89c7 MOV Edi,eax0040412A be 00104000 MOV esi,ahpack.004010000040412F Pushad; start Aplib00404130 FC CLD00404131 B2 MOV dl,8000404133 31DB XOR ebx,ebx00404135 A4 MOVS BYTE ptr es:[edi],byte ptr Ds:[esi]00404136 B3 MOV bl,200404138 E8 6d000000 call AHPACK.004041AA0040413D ^ F6 JNB short ahpack.0040
It turns out that there have been checksum-related cracking on the internet. I will interview the checksum compilation code and the vb version for cracking.Currently, I am using the checksum code of vb.Assembly Code of checksum:GOOGLECHECK proc nearVar_8 = dword ptr-8Var_4 = dword ptr-4Url_offset = dword ptr 8Url_length = dword ptr 0ChMagic_dword = dword ptr 10 hPush ebpMov ebp, espPush ecxPush ecxMov eax, [ebp + url_length]Cmp eax, 0ChPush ebxPush esiMov esi, [ebp + magic_dword]; = 0xE6359A60Pu
1.GetcurrentdirectoryGet Current Directory 2.GetmodulefilenameObtain the complete path+ PathremovefilespecSeparate pure path . 386 . ModelFlat, stdcall Option Casemap: None IncludeWindows. inc IncludeKernel32.inc IncludeUser32.inc IncludelibKernel32.lib IncludelibUser32.lib IncludeShlwapi. inc; PathremovefilespecUse IncludelibShlwapi. Lib . Data HinstanceDd? SzprofilenameDBMax_path DUP (?) SzfilenameDB'/Test. ini', 0;The file name is prefixed./ . Code Start:InvokeGetmodulehandle, null MoVHins
CCBE push EBX. Text: 0045 CCBF push ESI. Text: 0045ccc0 mov [EBP + var_4], eax; set the last 4 bytes of the variable to [005fbf64] And a random value.. Text: 0045ccc3 push EDI. Text: 0045ccc4 Lea eax, [EBP + widecharstr]. Text: 0045 ccca push eax. Text: 0045 cccb mov ECx, offset a_htm; ". htm". Text: 0045ccd0 mov edX, 80000000 H. Text: 0045ccd5 call sub_45c9f0. Text: 0045 ccda test eax, eax. Text: 0045 CCDC jnz loc_45cdce. Text: 0045cce2 mov EBX, DS:
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