bs

#include <windows.h>
#include <winternl.h>
#include <stdio.h>

__declspec(noinline)
__declspec(naked)
typedef struct _PROCESS_BASIC_INFORMATION
{
    NTSTATUS ExitStatus;
    PPEB PebBaseAddress;
    ULONG_PTR AffinityMask;
    KPRIORITY BasePriority;
    HANDLE UniqueProcessId;
    HANDLE InheritedFromUniqueProcessId;
} PROCESS_BASIC_INFORMATION, *PPROCESS_BASIC_INFORMATION;

NTSTATUS CallNtQueryInformationProcess(
                                       NTSTATUS NtQueryInformationProcess(
                                                                          __in HANDLE ProcessHandle,
                                                                          __in PROCESSINFOCLASS ProcessInformationClass,
                                                                          __out_bcount(ProcessInformationLength) PVOID ProcessInformation,
                                                                          __in ULONG ProcessInformationLength,
                                                                          __out_opt PULONG ReturnLength
                                                                          )
                                       )
{
    __asm {
        mov eax, 0x00A1		/* WIndows Server 2003 SP1 */
        mov edx, 0x7FFE0300 /* KUSER_SHARED_DATA syscall stub */
        call dword ptr [edx] /* call the stub code */
        ret
    }
}

int main(int argc, char *argv[])
{
    int i =0;
    PROCESS_BASIC_INFORMATION basicInfo;
    __try  {
        NTSTATUS i= CallNtQueryInformationProcess(NtCurrentProcess(),ProcessInformationClass, &basicInfo, sizeof(basicInfo), NULL);
        i=basicInfo.UniqueProcessId;

    }
    __finally{

    }
    return i;
}