check whether your input is correct". I think those characters may be nearby, so double-click "registration failed, check whether your input is correct.
00415829 |> 66: C745 A4 D4> mov word ptr ss: [EBP-5C], 0D40036682f |. BA ADEC4900 mov edx, TextDraw.0049ECAD; Registration failed. Please check whether your input is correct00415834 |. 8D45 B8 lea eax, dword ptr ss: [EBP-48]
In section 00415829, the "jump from 0000004ed" is displayed in the informat
efficiency, should be converted to assembly, the intermediate results into a separate register40.//Thanks to Menzi11 's article, let me realize that the relevant data in the program will make the CPU can not disorderly execution.41.//Here is replaced by pseudo assemblerTYPE S4 = 0;43.Register TYPE r1 = 0;Register TYPE r2 = 0;for (int i = 0; i R1 + + + a[i++];R2 + = a[i++];49.}50.Wuyi Cout52.}
Several of the above versions are reasonable, but these optimizations are based on the assumption that
other than esp. The scaling factor can be 1, 2, 4, or 8. The offset is an immediate number. For example, [ebp+edx*8+200] is a valid, valid address expression. Of course, in most cases you don't need to be so complicated, the address, scaling factor, and offset do not necessarily appear.
The base unit of memory is bytes (byte). Each byte is 8 bits, so the maximum number of energy-saving expressions per word is 11111111, or 255 of the decimal. In gene
The test software is Splish.exe.Bytes ------------------------------------------------------------------------------------------I am sure everyone knows the beginning of searching for an algorithm. I will not talk about it here. Next I will directly discuss the assembly code and comments of the algorithm.Bytes ------------------------------------------------------------------------------------------------004015E4 55 push ebp; algorithm started004015E5 8BEC mov ebp, ESP004015E7 6A 20 PUSH 2000401
dummy1, int dummy2){_ ASM {Push EBPMoV EBP, ESPMoV eax, 152Lea edX, 8 [EBP]Int 0x2ePop EBPRET 9}}
It turns out that the user space also has an ntreadfile (), which is executing the self-trapping command "int 0x2e ". Let's take a look at this Assembly Code. Here, 152 is the call number of the System Call ntreadfile (), so when the CPU falls into the system space, the register eax holds the specific system call number. The register
connect them during compilation?In this case, we can conclude that there is another secret. For more information, see ntreadfile () in msvc6/iface/native/syscall/debug/ZW. C:
_ Declspec (naked) _ stdcallNtreadfile (INT dummy0, int dummy1, int dummy2){_ ASM {Push EBPMoV EBP, ESPMoV eax, 152Lea edX, 8 [EBP]Int 0x2ePop EBPRET 9}}
It turns out that the user space also has an ntreadfile (), which is executing the self-trapping command "int 0x2e ". Let's t
In many network development scenarios, memory conversion is often encountered in the following scenarios:
#define PACKAGE_PARSE_ERROR -1#define PACKAGE_PARSE_OK 0int parse_package( int* a, int* b, int* c, int* d, char* buf, int buf_len ){ if( !buf || buf_len
This is a call in the Process of network unpacking, and the packet process is a reverse process.
An application like this can be replaced by an integer forced conversion, and the efficiency will be at least doubled.
To illustrate t
Reading Tips:
《Delphi Image ProcessingThe series focuses on efficiency. The general code is Pascal, and the core code is BaSm.
《C ++ Image ProcessingThe series focuses on code clarity and readability, and all uses C ++ code.
Make sure that the two items are consistent and can be compared with each other.
The code in this article must include the imagedata. Pas unit in "Delphi Image Processing-data type and public process.
The minimum value processing of an image is centered on the current pixel
de facto standard?
In other words, thefuck is not very tall. _ (: 3 "outputs) _ list of excellent Python projects (awesome-python)
Vinta/awesome-python · GitHub
Pycrumbs/pycrumbs. md at master · kirang89/pycrumbs · GitHub
Svaksha/pythonidae · GitHub
Checkcheckzz/python-github-projects · GitHub
Rasbt/python_reference · GitHub
Easy-Python
And awesome-* Series
Bayandin/awesome-awesomeness · GitHub
Sqlmap!
Goagent!
By the way, there are also shadowsocks!
Open
Tools:VC 7.0BCB 6.0Compilation options: Maximum Speed Optimization (VC 7.0 turns off the automatic inline function option)Decompilation tool: w32dasm
Benchmark Test procedure:Void test (){Int A = 0, B = 1, C = 4;For (INT I = 0; I ++;}}
Int main (){_ ASM {MoV edX, EDXNOP};Test ();}
Purpose: To test the program's ability to optimize useless functions. Because test does not return any value or modify any external variables,Therefore, for programs, this i
: 77F061F8 _ NtQuerySystemInformation @ 16
In ntdll, the two functions of zw and nt are actually the same subject:
. Text: 77F061F8 mov eax, 105 h; NtQuerySystemInformation
. Text: 77F061F8; RtlGetNativeSystemInformation
. Text: 77F061FD mov edx, 7FFE0300h
. Text: 77F06202 call dword ptr [edx]
. Text: 77F06204 retn 10 h
Then compare the image:
Check whether the Mode is usermode or kernelmode.
Ntdll. the
Core tips: This experiment demonstrates that when calling a method in a class, all methods imply a self parameter, and this parameter is passed as the first parameter of the object method...
First, create an empty form and put a button.The following two methods are declared under implementation:
// The external method declares only one parameter. In this case, the standard Object internal event Method tpolicyevent is declared. In this declaration, the sender corresponds to the object pointer
This article provides three different ways to invoke Ggplot in Python (IPython notebook).
In the large data age, data visualization is a very hot topic. Every bi manufacturer invests a lot of energy in the field of data visualization. Tableau, with its powerful data visualization capabilities, has become a hot-market company in Silicon Valley. Tableau data visualization of the product, its theoretical basi
Traceback (most recent):File "manage.py", line all, in startup = Importlib.import_module (Edx_args.startup)File "/usr/lib/python2.7/importlib/__init__.py", line Notoginseng, in Import_module__IMPORT__ (name)File "/edx/app/edxapp/edx-platform/cms/startup.py", line 7, Settings. Installed_apps # pylint:disable=w0104File "/edx/app/edxapp/venvs/edxapp/local/lib/python
Use the cpuid Assembly command (machine code: 0fh a2h, if your compiler does not support cpuid command, only emit machine code), this command can be recognized by the following CPU:
More than 486 of Intel CPUs,
CPU above cyrix M1,
CPU above amd am486
(1) obtain the cpu oem string to determine the CPU vendor
Let eax = 0 first, then call cpuid
InEl CPU will return:
EBX: 756e6547h 'genu'EdX: 49656e69h 'inei'ECX: 6c65746eh 'ntel'EBX, EDX, and ECX
important parts abve are:1. The code at 77D55E9D. Which copies the address of the bmp file stringInto ecx.
2. The code at 77D55EA8. This checks if the hinst parameter passedLoadImage is NULL. If we jump to the code at address 77D57C6E becuase of thisLine:
77D55EB0 je _ LoadBmp @ 20 + 21 h (77D57C6Eh); If esi was NULL jumpsTo code at 77D57C6E
This takes us to this assembly:
77D57C6E mov esi, dword ptr [_ hmodUser (77da01_h)]77D57C74 movzx eax, cx77D57C77 xor ebx, ebx77D57C79 sub eax, 7 FDCh77D57
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