edi 845

First, through the disassembly language, let's take a look at the relationship between the simplest recursive function and the stack. In Visual Studio 2008 and debug environments, you can view the language after disassembly in debug/Windows/disassembly. Now let's take a look at factorial n! Implementation The C language implementation code is as follows: #include The language after disassembly is as follows: Main Program int main(void){00DB1FD0 push ebp 00DB1FD1 mov ebp,esp

at the disassembly below:C code same as above Ubuntu +Bit disassembly:intMain () {804846D: - Push %EBP 804846E: theE5 mov%esp,%EBP 8048470: theE4 f0 and $Xfffffff0,%esp 8048473: theEcTen Sub $0x10,%esp Test (1, 2); 8048476: C7 - - Geneva Geneva xx xxMovl $X2,0x4(%esp)804847D:xx 804847E:c7Geneva - on xx xx xxMovl $X1, (%esp)8048485: E88A FF FF call8048414return 0;804848A:b8xx xx xx xxmov $x0,%eax}intTestintAintb) {8048414: -

of instruction (below) are to assign a value of 0CCCCCCCCh to the memory area of the 48h that was just left out.00401039 Lea edi,[ebp-48h]0040103C mov ecx,12h00401041 mov eax,0cccccccch00401046 Rep stos dword ptr [edi].The next three stack instructions, respectively, Ebx,esi,edi into the stack, which is also part of the "protection scene", these are part of the

MOV Esi,offset @s1MOV Edi,offset @s2MOV ecx,10CldRep Movsd1.Rep Movsd every ecx! =0 executes Movsd, then ecx=ecx-1 movsd move Ds:[si] to Es:[di], in 32-bit assembler can replace the Si,edi with ESI instead of Di 2. at the same time because in general exe DS = ES program starting position so another ESI = offset @s1 can find the variable s1, edi= offset @s2 can f

locate the memory segment Descriptor mov es, ax xor edi, edi mov edi, (up to ten +) //screen 10th, No. 0 column br> mov ah, 0ch //0000: Black bottom 1100: Red word mov al, ' G ' mov [es:edi],ax jmp $nbs P LenOfCode32 equ $-label_code32 =================================== The approximate meaning of this piece of code is:First in the 16-bit code segment

Assembly language: Movsb,movsw,movsdTransferred from: http://blog.csdn.net/zhenyongyuan123/article/details/8364011Currently, the 80386 series of processors provide several sets of instructions for handling byte, Word, and double-word values, although these directives become basic string directives, but their usage is not limited to character arrays.Instructions:MOVSB, MOVSW, Movsd Describe:Moves the string data, copying the data at the memory address addressed by the ESI register to the memory a

Paste the source code first#include Another example#include Another one.#include Disassembly analysis1:void Main () 2: {00401010 push ebp00401011 mov ebp,esp00401013 sub esp,68h00401016 p Ush ebx00401017 push esi00401018 push edi00401019 Lea EDI,[EBP-68H]0040101C mov ECX,1AH00401021 mov eax,0cccccccch00401026 rep stos dword ptr [Edi]3:int narray[5] = {1, 2, 3 , 4, 5};00401028 mov dword ptr [ebp-14h]

1111 //Program Description: Output multi-line content, the content is as follows2 /*3 *4 ***5 *****6 *******7 *****8 ***9 *Ten */ One#include A using namespacestd; - intMain () - { thecout " *"Endl; -cout " ***"Endl; -cout " *****"Endl; -cout "*******"Endl; +cout " *****"Endl; -cout " ***"Endl; +cout " *"Endl; ASystem"Pause"); at return 0; -}Debug version of Disassembly codeintMain () {00f55e70 push ebp //Enter function after first thing, save stack bottom pointer ebp, Exi

by http://tmdnet.nothave.com NtGodModex.exe http://www.xfocus.net/tools/200804/1272.html NtGodMode.exe 9.00 KB (9,216 bytes) UPX shell, directly with ollydbg shelling, the process slightly Ntgodmode~.exe mb (123,392 bytes) view with PE tool, Delphi write 00403220 > PUSH EBP 00403221 8BEC MOV Ebp,esp 00403223 B9 0d000000 MOV ecx,0d 00403228 6A PUSH 0 0040322A 6A PUSH 0 0040322C DEC ECX 0040322D ^ F9 jnz short ntgodmod.00403228 0040322F I PUSH ECX 00403230 PUSH EBX 00403231 PUSH ESI 00403232 PUS

))LSet L = bIp2long = L.valEnd Function It's good and powerful to copy mybytes type variables to MyLong type variables with LSet. Look at the generated assembly code: Copy Code code as follows: 00401A0E Lea eax, DWORD ptr [ebp-0x20]; Address of variable B 00401A11 push EAX 00401a12 Lea eax, DWORD ptr [ebp-0x14]; The address of the variable L 00401A15 push EAX 00401A16 Push 0x4 00401a18 call __vbacopybytes; JMP to Msvbvm60.__vbacopybytes Called is the __v

The usage of "[]" has been described in "FAQ" and is cited as follows: 1, push DWORD ptr [024c1100] pressure stack 024c1100 value of two words2, CMP eax,[ebp+14] eax-ebp+14 valid value, does not retain the value, mainly looks at the sign bit3, CMP byte ptr [eax],46 byte type eax-46, see sign bit4, Lea eax,[edx-02] edx-02 valid value (an address value) to EAX5, MOV ecx,[edx+08] edx+8 value as the address, this address points to the value of ECX I am going to add a few more examples of what I have

strings : 00401089 e80e010000 Call 0040119C : 0040108E 894618 mov dword ptr [esi+18], eax : 00401091 FF7604 push [esi+04]; =71a20000h : 00401094 68D909F5AD push adf509d9; Custom encoding for Wsasocketa strings : 00401099 e8fe000000 Call 0040119C : 0040109E 89461C mov dword ptr [esi+1c], eax : 004010a1 FF7604 push [esi+04]; =71a20000h : 004010a4 68a41a70c7 push c7701aa4; Bind string's Custom encoding : 004010a9 e8ee000000 Call 0040119C : 004010AE 894620 mov dword ptr [esi+20], eax : 004010b1

Push EDI 00401029 Lea Edi,[ebp-4ch] 0040102C mov ecx,13h 00401031 mov eax,0cccccccch 00401036 Rep stos dword ptr [edi] 4:int var1 = param1; 00401038 mov eax,dword ptr [ebp+8] 0040103B mov dword ptr [Ebp-4],eax; Note the order in which the VAR1,VAR2,VAR3 is pressed into the stack! 5:int var2 = param2; 0040103E mov ecx,dword ptr [ebp+0ch] 00401041 mov dw

. Data? hfile HANDLE? Sizereadwrite DWORD? . Code Start: mov eax, offset ring0proc mov [ourgate], Ax; Put the offset words shr eax, 16; into our descriptor mov [ourgate+6], ax Sidt Fword ptr IDTR mov ebx, DWORD ptr [idtr+2]; Load IDT Base Address add ebx, 8*3; Address of int 3 descriptor in EBX mov edi, offset savedgate mov esi, ebx Movsd; Save the old descriptor Movsd; Into Savedgate mov edi, ebx mov

, the maximum bandwidth of data transmission depends on the width and transmission frequency of all data transmitted simultaneously, that is, the data bandwidth = bus frequency × data Bit Width limit 8. For example, Intel pⅱ 333 uses 66 MHz Front-End bus, so the data exchange bandwidth between it and the memory is 528 MB/S= (66 × 64)/8, while its P ⅱ 350 uses a 800 MHz Front-End bus, so its peak bandwidth for data exchange is 100 Mb/s = (× 64)/8. For example, IntelThe

bytes/512 bytesI/O size (minimum/optimal): 512 bytes/512 bytesDisk identifier: 0x0004a6baDevice Boot Start End Blocks Id System/Dev/sda1 × 1 26 204800 83 LinuxPartition 1 does not end on cylinder boundary./Dev/sda2 26 7859 62914560 8e Linux LVM/Dev/sda3 7859 9164 10489446 83 Linux Partx-a actually means to notify (tell) the kernel that the disk information has changed. You need to update it once, but it is not displayed once. We can execute it to check the result, if it is 10 Gb, the primary pa

log thread = 1 sequence = 124 RECID = 843 STAMP = 811181727Input archived log thread = 1 sequence = 125 RECID = 844 STAMP = 811181727Input archived log thread = 1 sequence = 126 RECID = 845 STAMP = 811181728Input archived log thread = 1 sequence = 127 RECID = 846 STAMP = 811181729Input archived log thread = 1 sequence = 128 RECID = 847 STAMP = 811181729Input archived log thread = 1 sequence = 129 RECID = 848 STAMP = 811181730Input archived log thread

: task_200811191041_0015_r_000000_0 done; removing files. 11:17:18, 705 Warn org. Apache. hadoop. mapred. tasktracker: Unknown child task finshed: task_200811191041_0015_r_000000_0. ignored. 11:17:40, 845 info org. Apache. hadoop. mapred. tasktracker: received 'killjobaction' For Job: job_200811191041_0015 11:17:40, 845 Info org. Apache. hadoop. mapred. taskrunner: task_200811191041_0015_m_000011_0 done; r

the use of mobile phone habits, active cleaning memory, closed background programs and other services. All of this is done locally on the phone, and users do not have to worry about their personal privacy being uploaded to the public space in the cloud, with the ability to enjoy better battery life and running speed.This may be somewhat different from the user's traditional perception of AI, after all, the majority of manufacturers now focus on promoting the ability to take pictures of mobile A

Lenovo's Notebook, the graphics card nvidia gt218m, defaults to using open source drivers, but hangs and then wakes up on the black screen without returning to the desktop.1. WORKAROUND: Install nvidia proprietary driver $sudo Apt-get installation nvidia-currentNew problem: Boot logo and on/Off animation are not normal, only display text logoWorkaround: 1, edit/etc/default/grub file$sudo Gedit/etc/default/grubWillgrub_cmdline_linux_default= "Quiet Splash"Switchgrub_cmdline_linux_default= "VIDEO=