TLS callback for x86 & x64 windows OS.

tls-callback.cpp

// @source: http://www.unknowncheats.me/forum/c-and-c/84146-tls-callback-tutorial.html
#include "windows.h"
#include <stdio.h>

void NTAPI __stdcall TLSCallbacks(PVOID DllHandle, DWORD dwReason, PVOID Reserved);
//linker spec
#ifdef _M_IX86
#pragma comment (linker, "/INCLUDE:__tls_used")
#pragma comment (linker, "/INCLUDE:__tls_callback")
#else
#pragma comment (linker, "/INCLUDE:_tls_used")
#pragma comment (linker, "/INCLUDE:_tls_callback")
#endif
EXTERN_C
#ifdef _M_X64
#pragma const_seg (".CRT$XLB")
const
#else
#pragma data_seg (".CRT$XLB")
#endif
//end linker

//tls import
PIMAGE_TLS_CALLBACK _tls_callback = TLSCallbacks;
#pragma data_seg ()
#pragma const_seg ()
//end 
// tls declaration
void NTAPI __stdcall TLSCallbacks(PVOID DllHandle, DWORD dwReason, PVOID Reserved)
{
	MessageBox(nullptr, L"TLS Callback before main :)", L"dZkyXj - Debugger Owned!", 0);
	ExitProcess(0);
}

// end declaration

int main(int argc, char* argv[])
{
	printf("wow i'm main function but i'll never be executed :(");
}