pubg esp

_ Stdcall and _ cdecl function calls are different, __stdcall _ cdecl Refer: Http://blog.csdn.net/hudashi/article/details/7820338 Http://shitou7630.blog.163.com/blog/static/32699536201342110155436/ Http://www.cnblogs.com/52yixin/archive/2011/06/29/2093634.html Http://blog.csdn.net/mniwc/article/details/7993361 Http://www.cnblogs.com/coderzh/archive/2008/12/01/1345053.html Http://blog.sina.com.cn/s/blog_6f6769b50100uhzz.html Https://msdn.microsoft.com/zh-cn/library/ms235286.aspx (Owed by: spring

Call Stack The concept of stack is explained in detail in the data structure. List some key points: 1. First in first out. 2. Data can always be stored or retrieved from the top of the stack. In the x86 processor, push the stack command. Pushing an item to the top of the stack will reduce the top pointer of the stack by four bytes. The stack top pointer is stored in register esp. Correspondingly, the register name is the abbreviation of s

. Even the punctuation on the keyboard can be added to the Testcode, which can be arranged in the order of the ASCII code table, so that more space is verified at once.look for an appropriate address to overwrite the original return addressWhat we need to do now is to determine what address the last four "X" in "jiangyejiangxxxx" should be. Here we cannot create an address out of thin air, but should be based on a legitimate address. Of course, we can find a lot of suitable address through the o

as bytes, words, double words, and Booleans, is 4 bytes in the stack, and data that is larger than 4 bytes occupies a 4-byte integer multiple in the stack.3) The two registers associated with the operation of the stack are the EBP register and the ESP register, and in this article you only need to interpret EBP and ESP as 2 pointers. The ESP register always poin

"Peace of Blessing + Original works reproduced please specify the source +" Linux kernel analysis "MOOC course http://mooc.study.163.com/course/USTC-1000029000 "first, the process of initializationThe operating system kernel boot entry function is void __init my_start_kernel (void);Here is a simple definition of the two CPU states of a process:struct Thread {unsigned long IP; Indicates an EIP directiveunsigned long sp;//represents ESP, stack top poin

data that is larger than 4 bytes occupies a 4-byte integer multiple in the stack.3) The two registers associated with the operation of the stack are the EBP register and the ESP register, and in this article you only need to interpret EBP and ESP as 2 pointers. The ESP register always points to the top of the stack, and when the push command presses the data int

Hex @ Gentoo ~ /Signal $ kill-INT 4639 2.3 The program stops at the breakpoint after receiving the signal Breakpoint 1, sig_int (signo = 2) at sigint. c: 6 6 { (Gdb) I r esp Esp 0xbfffe7ec 0xbfffe7ec (Gdb) x/40a 0xbfffe7ec 0xbfffe7ec: 0xb7fff400 0x2 0x33 0x0 0xbfffe7fc: 0x7b 0x7b 0x8048930 0xbfffe80c: 0xbfffed58 0xbfffed40 0x0x0 0xbfffe81c: 0xbfffec18 0x0 0x0x0 0xbfffe82c: 0x8048336 0xbfffe83c: 0x7b 0xb

generate an assembly file using objdump, through the corresponding address, you can find out which function has a problem. As for the guessed code, you need to build a unit test based on the analysis situation or re-launch the code for testing. Specific process examples are as follows:Objectdump-d ##. so >##. oVim ##. o6 libTaps2.so + 0xa452d ./Minidump_stackwalk 7ee5c76f-afe2-f9bd-564dedb7-57d73e0c.dmp Thread 7 (crashed)0 linux-gate.so + 0x430Eip = 0xb78b4430

" command to break a breakpoint under the accept function and analyze the code to find the cause of the vulnerability as follows.. Text: 0041AA20 mov eax, [esp + arg_0]. Text: 0041AA24 mov eax, [eax + 18 h]. Text: 0041AA27 mov dword_4B0F7C, eax. Text: 0041AA2C cmp word ptr [eax + 98 h], 0. Text: 0041AA34 jz short loc_41AA56 // The condition is true.. Text: 0041AA56 mov edx, [eax + 4Ch] // "A" constructed data. Text: 0041AA59 push offset s_If-modified-

__stdcall __cdecl __fastcall vc6.0:int __stdcall/__cdecl/__fastcall Add (int x, int y){return x+y;}void Main (){Add (2,3);}1.__stdcall:1:int __stdcall Add (int x, int y)2: {00401020 Push EBP00401021 mov Ebp,esp00401023 Sub esp,40h00401026 push EBX00401027 push ESI00401028 Push EDI00401029 Lea edi,[ebp-40h]0040102C mov ecx,10h00401031 mov eax,0cccccccch00401036 Rep stos dword ptr [edi]3:return X+y;00401038 mov eax,dword ptr [ebp+8]0040103B

, ESI73D311B9 FF50 60 call dword ptr ds: [EAX + 60]; PreTranslateMessage (Message preprocessing)73D311BC 85C0 test eax, EAX73D311BE 75 0E jnz short MFC42.73D311CE73D311C0 57 push edi; message preprocessing returns FALSE73D311C1 FF15 ACB6DC73 call dword ptr ds: [73D311C7 57 PUSH EDI73D311C8 FF15 30B6DC73 call dword ptr ds: [;73D311CE 6A 01 PUSH 1; return TRUE73D311D0 58 POP EAX73D311D1 5F POP EDI73D311D2 5E POP ESI73D311D3 C3 RETN Tip:A. OD after the program is loaded, call up the MFC42.dll modul

*): decompile the code section of A. obj.Open the ursoft w32dasm tool (I use version 8.93)Select all files when opening the file, because the software mainly targets file formats such as PE, le, and NE. SoThe offset must be specified to decompile the OBJ file. Above attention! (Note: another way to obtain this information is to use dumpbin/section:. text ). That is, the file offset of the Code section.Therefore, in the prompt dialog box that opens the OBJ file, enter 00000355Start disassembly f

, click OK, and come here.0045E317/$8B4424 08 mov eax, dword ptr ss: [ESP + 8]0045E31B |. 56 PUSH ESI0045E31C |. 85C0 test eax, EAX0045E31E |. 8BF1 mov esi, ECX0045E320 |. 75 08 jnz short 1_ra_m.0045e32a0045E322 |. E8 AEED0000 CALL history ra_m.0046d0d50045E327 |. 8B40 10 mov eax, dword ptr ds: [EAX + 10]0045E32A |> 85F6 test esi, ESI0045E32C |. 75 04 jnz short 1_ra_m.0045e3320045E32E |. 33C9 xor ecx, ECX0045E330 |. EB 03 jmp short 1_ra_m.0045e3350045

Gas multi-file Engineering From: programming from groundup Chapter 6 The main purpose is to understand how to organize multi-file projects (Forms) File record-def.s: . Equ record_firstname, 0 . Equ record_lastname, 40 . Equ record_address, 80 . Equ record_age, 320 . Equ record_size, 324 File Linux. S: # Common Linux Definitions # System call numbers . Equ sys_exit, 1 . Equ sys_read, 3 . Equ sys_write, 4 . Equ sys_open, 5 . Equ sys_close, 6 . Equ sys_brk, 45 # System Call interrupt number . Eq

consists of Security Consortium (Security Association, SA) [1] and security protocols (including authentication header (AH) [2]. Security load ESP (Encapsulating Security Payload, ESP) [3]. Key Management (Internet Key Management, Ike) [4] and authentication and encryption algorithms constitute a complete security system. Structure 1.2.1 Security Alliance (SA)Security Alliance is the basis of IPSec. It det

I hope you can come up with some ideas ~ Check whether there is any shell... Microsoft Visual C ++ 6.0, indicating no shell ~ Let's enter an account and password for trial run ~ The error message "incorrect registration name or registration code!" is displayed !" Okay. Let's load it with OD ~~ Search for asii, find the error message, and double-click it to go to the code ~ 00401d00/0f85 df1_00 jnz ultradic.00401de500401d06. | 68 01100000 push 100100401d0b. | 68 f4704300 push ultradic.004370f4; A

plays an important role in the program operation. Most importantly, the stack holds the maintenance information needed for a function call, known as a stackframe, and a stack frame of a function (the called function) generally includes the following elements: (1) Function parameters, the default invocation convention, in the Order of the right and left to press the parameters into the stack in turn. Executed by the function caller. (2) The return address of the function, that is, the address of

Author: uuk[Software name]: Total Commander[Software Version]: 7.56a[Shelling method]: new version without shelling[Programming language]: Borland Delphi 2.0 [Overlay][Tools]: OD PEID IDA[Operating platform]: Windows XP[Software introduction]: A pretty good dual-column File Management Software[Author's statement]: it is only for research purposes. Please purchase a genuine version for use.We know that Total Commander has self-verification. by tracking the CreateFile and ReadFile functions, it is

carried out in assembly, let's talk about some personal opinions. Next, we will conduct some small tests and explain them in assembly language. You can do it together. (1) Char name [] and char * Name [CPP] View plaincopy 1: 2:VoidProcess () 3 :{ 00401020 push EBP 00401021 mov EBP, ESP 00401023 sub ESP, 4ch 00401026 push EBX 00401027 push ESI 00401028 push EDI 00401029 Le

and receiver are not the hostTunnel is used to provide original group protection for intrusions from the sender and receiver. It seems that the entire group is transmitted through a hypothetical tunnel.1. 2. Two security protocolsIPSec defines two security protocols: the Authentication Header (AH) protocol and the encapsulation security load (ESP) protocol, which provide authentication and/or encryption at the IP layer.1.2.1. header Authentication Pr