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/* $Id: ldrNative-win.cpp $ */
/** @file
* IPRT - Binary Image Loader, Win32 native.
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE 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.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP RTLOGGROUP_LDR
#include <iprt/nt/nt-and-windows.h>
#include <iprt/ldr.h>
#include "internal/iprt.h"
#include <iprt/alloca.h>
#include <iprt/assert.h>
#include <iprt/ctype.h>
#include <iprt/err.h>
#include <iprt/file.h>
#include <iprt/log.h>
#include <iprt/once.h>
#include <iprt/path.h>
#include <iprt/string.h>
#include <iprt/utf16.h>
#include "internal/ldr.h"
#include "internal-r3-win.h"
#ifndef LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR
# define LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR UINT32_C(0x100)
# define LOAD_LIBRARY_SEARCH_APPLICATION_DIR UINT32_C(0x200)
# define LOAD_LIBRARY_SEARCH_SYSTEM32 UINT32_C(0x800)
#endif
DECLHIDDEN(int) rtldrNativeLoad(const char *pszFilename, uintptr_t *phHandle, uint32_t fFlags, PRTERRINFO pErrInfo)
{
Assert(sizeof(*phHandle) >= sizeof(HMODULE));
AssertReturn(!(fFlags & RTLDRLOAD_FLAGS_GLOBAL), VERR_INVALID_FLAGS);
AssertLogRelMsgReturn(RTPathStartsWithRoot(pszFilename), /* Relative names will still be applied to the search path. */
("pszFilename='%s'\n", pszFilename),
VERR_INTERNAL_ERROR_2);
AssertReleaseMsg(g_hModKernel32,
("rtldrNativeLoad(%s,,) is called before IPRT has configured the windows loader!\n", pszFilename));
/*
* Convert to UTF-16 and make sure it got a .DLL suffix.
*/
/** @todo Implement long path support for native DLL loading on windows. @bugref{9248} */
int rc;
RTUTF16 *pwszNative = NULL;
if (RTPathHasSuffix(pszFilename) || (fFlags & RTLDRLOAD_FLAGS_NO_SUFFIX))
rc = RTStrToUtf16(pszFilename, &pwszNative);
else
{
size_t cwcAlloc;
rc = RTStrCalcUtf16LenEx(pszFilename, RTSTR_MAX, &cwcAlloc);
if (RT_SUCCESS(rc))
{
cwcAlloc += sizeof(".DLL");
pwszNative = RTUtf16Alloc(cwcAlloc * sizeof(RTUTF16));
if (pwszNative)
{
size_t cwcNative;
rc = RTStrToUtf16Ex(pszFilename, RTSTR_MAX, &pwszNative, cwcAlloc, &cwcNative);
if (RT_SUCCESS(rc))
rc = RTUtf16CopyAscii(&pwszNative[cwcNative], cwcAlloc - cwcNative, ".DLL");
}
else
rc = VERR_NO_UTF16_MEMORY;
}
}
if (RT_SUCCESS(rc))
{
/* Convert slashes just to be on the safe side. */
for (size_t off = 0;; off++)
{
RTUTF16 wc = pwszNative[off];
if (wc == '/')
pwszNative[off] = '\\';
else if (!wc)
break;
}
/*
* Attempt load.
*/
HMODULE hmod;
static int s_iSearchDllLoadDirSupported = 0;
if ( !(fFlags & RTLDRLOAD_FLAGS_NT_SEARCH_DLL_LOAD_DIR)
|| s_iSearchDllLoadDirSupported < 0)
hmod = LoadLibraryExW(pwszNative, NULL, 0);
else
{
hmod = LoadLibraryExW(pwszNative, NULL, LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR | LOAD_LIBRARY_SEARCH_SYSTEM32
| LOAD_LIBRARY_SEARCH_APPLICATION_DIR);
if (s_iSearchDllLoadDirSupported == 0)
{
if (hmod != NULL || GetLastError() != ERROR_INVALID_PARAMETER)
s_iSearchDllLoadDirSupported = 1;
else
{
s_iSearchDllLoadDirSupported = -1;
hmod = LoadLibraryExW(pwszNative, NULL, 0);
}
}
}
if (hmod)
{
*phHandle = (uintptr_t)hmod;
RTUtf16Free(pwszNative);
return VINF_SUCCESS;
}
/*
* Try figure why it failed to load.
*/
DWORD dwErr = GetLastError();
rc = RTErrConvertFromWin32(dwErr);
rc = RTErrInfoSetF(pErrInfo, rc, "GetLastError=%u", dwErr);
}
else
rc = RTErrInfoSetF(pErrInfo, rc, "Error converting UTF-8 to UTF-16 string.");
RTUtf16Free(pwszNative);
return rc;
}
DECLCALLBACK(int) rtldrNativeGetSymbol(PRTLDRMODINTERNAL pMod, const char *pszSymbol, void **ppvValue)
{
PRTLDRMODNATIVE pModNative = (PRTLDRMODNATIVE)pMod;
FARPROC pfn = GetProcAddress((HMODULE)pModNative->hNative, pszSymbol);
if (pfn)
{
*ppvValue = (void *)pfn;
return VINF_SUCCESS;
}
*ppvValue = NULL;
return RTErrConvertFromWin32(GetLastError());
}
DECLCALLBACK(int) rtldrNativeClose(PRTLDRMODINTERNAL pMod)
{
PRTLDRMODNATIVE pModNative = (PRTLDRMODNATIVE)pMod;
if ( (pModNative->fFlags & RTLDRLOAD_FLAGS_NO_UNLOAD)
|| FreeLibrary((HMODULE)pModNative->hNative))
{
pModNative->hNative = (uintptr_t)INVALID_HANDLE_VALUE;
return VINF_SUCCESS;
}
return RTErrConvertFromWin32(GetLastError());
}
DECLHIDDEN(int) rtldrNativeLoadSystem(const char *pszFilename, const char *pszExt, uint32_t fFlags, PRTLDRMOD phLdrMod)
{
AssertReleaseMsg(g_hModKernel32,
("rtldrNativeLoadSystem(%s,,) is called before IPRT has configured the windows loader!\n", pszFilename));
/*
* Resolve side-by-side resolver API.
*/
static bool volatile s_fInitialized = false;
static decltype(RtlDosApplyFileIsolationRedirection_Ustr) *s_pfnApplyRedir = NULL;
if (!s_fInitialized)
{
s_pfnApplyRedir = (decltype(s_pfnApplyRedir))GetProcAddress(g_hModNtDll,
"RtlDosApplyFileIsolationRedirection_Ustr");
ASMCompilerBarrier();
s_fInitialized = true;
}
/*
* We try WinSxS via undocumented NTDLL API and flal back on the System32
* directory. No other locations are supported.
*/
int rc = VERR_TRY_AGAIN;
char szPath[RTPATH_MAX];
char *pszPath = szPath;
/* Get the windows system32 directory so we can sanity check the WinSxS result. */
WCHAR wszSysDir[MAX_PATH];
UINT cwcSysDir = GetSystemDirectoryW(wszSysDir, MAX_PATH);
if (cwcSysDir >= MAX_PATH)
return VERR_FILENAME_TOO_LONG;
/* Try side-by-side first (see COMCTL32.DLL). */
if (s_pfnApplyRedir)
{
size_t cwcName = 0;
RTUTF16 wszName[MAX_PATH];
PRTUTF16 pwszName = wszName;
int rc2 = RTStrToUtf16Ex(pszFilename, RTSTR_MAX, &pwszName, RT_ELEMENTS(wszName), &cwcName);
if (RT_SUCCESS(rc2))
{
static UNICODE_STRING const s_DefaultSuffix = RTNT_CONSTANT_UNISTR(L".dll");
WCHAR wszPath[MAX_PATH];
UNICODE_STRING UniStrStatic = { 0, (USHORT)sizeof(wszPath) - sizeof(WCHAR), wszPath };
UNICODE_STRING UniStrDynamic = { 0, 0, NULL };
PUNICODE_STRING pUniStrResult = NULL;
UNICODE_STRING UniStrName =
{ (USHORT)(cwcName * sizeof(RTUTF16)), (USHORT)((cwcName + 1) * sizeof(RTUTF16)), wszName };
NTSTATUS rcNt = s_pfnApplyRedir(1 /*fFlags*/,
&UniStrName,
(PUNICODE_STRING)&s_DefaultSuffix,
&UniStrStatic,
&UniStrDynamic,
&pUniStrResult,
NULL /*pNewFlags*/,
NULL /*pcbFilename*/,
NULL /*pcbNeeded*/);
if (NT_SUCCESS(rcNt))
{
/*
* Check that the resolved path has similarities to the
* system directory.
*
* ASSUMES the windows directory is a root directory and
* that both System32 and are on the same level. So, we'll
* have 2 matching components (or more if the resolver
* returns a system32 path for some reason).
*/
unsigned cMatchingComponents = 0;
size_t off = 0;
while (off < pUniStrResult->Length)
{
RTUTF16 wc1 = wszSysDir[off];
RTUTF16 wc2 = pUniStrResult->Buffer[off];
if (!RTPATH_IS_SLASH(wc1))
{
if (wc1 == wc2)
off++;
else if ( wc1 < 127
&& wc2 < 127
&& RT_C_TO_LOWER(wc1) == RT_C_TO_LOWER(wc2) )
off++;
else
break;
}
else if (RTPATH_IS_SLASH(wc2))
{
cMatchingComponents += off > 0;
do
off++;
while ( off < pUniStrResult->Length
&& RTPATH_IS_SLASH(wszSysDir[off])
&& RTPATH_IS_SLASH(pUniStrResult->Buffer[off]));
}
else
break;
}
if (cMatchingComponents >= 2)
{
pszPath = szPath;
rc2 = RTUtf16ToUtf8Ex(pUniStrResult->Buffer, pUniStrResult->Length / sizeof(RTUTF16),
&pszPath, sizeof(szPath), NULL);
if (RT_SUCCESS(rc2))
rc = VINF_SUCCESS;
}
else
AssertMsgFailed(("%s -> '%*.ls'\n", pszFilename, pUniStrResult->Length, pUniStrResult->Buffer));
RtlFreeUnicodeString(&UniStrDynamic);
}
}
else
AssertMsgFailed(("%Rrc\n", rc));
}
/* If the above didn't succeed, create a system32 path. */
if (RT_FAILURE(rc))
{
rc = RTUtf16ToUtf8Ex(wszSysDir, RTSTR_MAX, &pszPath, sizeof(szPath), NULL);
if (RT_SUCCESS(rc))
{
rc = RTPathAppend(szPath, sizeof(szPath), pszFilename);
if (pszExt && RT_SUCCESS(rc))
rc = RTStrCat(szPath, sizeof(szPath), pszExt);
}
}
/* Do the actual loading, if we were successful constructing a name. */
if (RT_SUCCESS(rc))
{
if (RTFileExists(szPath))
rc = RTLdrLoadEx(szPath, phLdrMod, fFlags, NULL);
else
rc = VERR_MODULE_NOT_FOUND;
}
return rc;
}
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