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/* $Id: VBoxSupLib-win.cpp $ */
/** @file
* IPRT - VBoxSupLib.dll, Windows.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/nt/nt-and-windows.h>
#include <iprt/path.h>
/**
* The Dll main entry point.
* @remarks The dllexport is for forcing the linker to generate an import
* library, so the build system doesn't get confused.
*/
extern "C" __declspec(dllexport)
BOOL __stdcall DllMainEntrypoint(HANDLE hModule, DWORD dwReason, PVOID pvReserved)
{
RT_NOREF1(pvReserved);
switch (dwReason)
{
/*
* Make sure the DLL isn't ever unloaded.
*/
case DLL_PROCESS_ATTACH:
{
WCHAR wszName[RTPATH_MAX];
SetLastError(NO_ERROR);
if ( GetModuleFileNameW((HMODULE)hModule, wszName, RT_ELEMENTS(wszName)) > 0
&& RtlGetLastWin32Error() == NO_ERROR)
{
int cExtraLoads = 2;
while (cExtraLoads-- > 0)
LoadLibraryW(wszName);
}
break;
}
case DLL_THREAD_ATTACH:
{
#ifdef VBOX_WITH_HARDENING
# ifndef VBOX_WITHOUT_DEBUGGER_CHECKS
/*
* Anti debugging hack that prevents most debug notifications from
* ending up in the debugger.
*/
NTSTATUS rcNt = NtSetInformationThread(GetCurrentThread(), ThreadHideFromDebugger, NULL, 0);
if (!NT_SUCCESS(rcNt))
{
__debugbreak();
return FALSE;
}
# endif
#endif
break;
}
case DLL_THREAD_DETACH:
/* Nothing to do. */
break;
case DLL_PROCESS_DETACH:
/* Nothing to do. */
break;
default:
/* ignore */
break;
}
return TRUE;
}
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