Which CPU information this code is trying to retrieve. This code is part of a larger package. I am not a Python programmer, and I want to convert this code to C#.
from ctypes import c_uint, create_string_buffer, CFUNCTYPE, addressof
CPUID = create_string_buffer("\x53\x31\xc0\x40\x0f\xa2\x5b\xc3")
cpuinfo = CFUNCTYPE(c_uint)(addressof(CPUID))
print cpuinfo()
If you are a Python programmer and knows what this code is doing, it will be a great help for me.
It executes the following machine code:
push bx
xor ax, ax
inc ax
cpuid
pop bx
retn
Basically it calls CPUID instruction of the CPU in order to get information about the CPU. Since EAX=1 it gets the processor info and feature bits. The result 32-bit integer is then displayed on the screen, see the wikipedia article or this page to decode the result.
EDIT: Since that's what you're looking for, here's an excellent article about invoking CPUID in a .NET/C# environment (sort of, with P/Invoke)
In addition to DrJokepu's answer. The python code is using the ctypes modules do implement the following C code(/hack):
char *CPUID = "\x53\x31\xc0\x40\x0f\xa2\x5b\xc3"; // x86 code
unsigned int (*cpuid)() = (unsigned int (*)()) CPUID; // CPUID points to first instruction in above code; cast it to a function pointer
printf("%u",cpuid()); // calling cpuid() effectively executes the x86 code.
Also note that this only returns the information in EAX and the x86 code should probably have also pushed/popped the values of ECX and EDX to be safe.