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/* $Id: ldrNative-posix.cpp $ */
/** @file
* IPRT - Binary Image Loader, POSIX 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 <dlfcn.h>
#include <iprt/ldr.h>
#include <iprt/assert.h>
#include <iprt/path.h>
#include <iprt/alloca.h>
#include <iprt/string.h>
#include <iprt/err.h>
#include <iprt/log.h>
#include "internal/ldr.h"
DECLHIDDEN(int) rtldrNativeLoad(const char *pszFilename, uintptr_t *phHandle, uint32_t fFlags, PRTERRINFO pErrInfo)
{
/*
* Do we need to add an extension?
*/
if (!RTPathHasSuffix(pszFilename) && !(fFlags & RTLDRLOAD_FLAGS_NO_SUFFIX))
{
#if defined(RT_OS_OS2) || defined(RT_OS_WINDOWS)
static const char s_szSuff[] = ".DLL";
#elif defined(RT_OS_L4)
static const char s_szSuff[] = ".s.so";
#elif defined(RT_OS_DARWIN)
static const char s_szSuff[] = ".dylib";
#else
static const char s_szSuff[] = ".so";
#endif
size_t cch = strlen(pszFilename);
char *psz = (char *)alloca(cch + sizeof(s_szSuff));
if (!psz)
return RTErrInfoSet(pErrInfo, VERR_NO_MEMORY, "alloca failed");
memcpy(psz, pszFilename, cch);
memcpy(psz + cch, s_szSuff, sizeof(s_szSuff));
pszFilename = psz;
}
/*
* Attempt load.
*/
int fFlagsNative = RTLD_NOW;
if (fFlags & RTLDRLOAD_FLAGS_GLOBAL)
fFlagsNative |= RTLD_GLOBAL;
else
fFlagsNative |= RTLD_LOCAL;
void *pvMod = dlopen(pszFilename, fFlagsNative);
if (pvMod)
{
*phHandle = (uintptr_t)pvMod;
return VINF_SUCCESS;
}
const char *pszDlError = dlerror();
RTErrInfoSet(pErrInfo, VERR_FILE_NOT_FOUND, pszDlError);
LogRel(("rtldrNativeLoad: dlopen('%s', RTLD_NOW | RTLD_LOCAL) failed: %s\n", pszFilename, pszDlError));
return VERR_FILE_NOT_FOUND;
}
DECLCALLBACK(int) rtldrNativeGetSymbol(PRTLDRMODINTERNAL pMod, const char *pszSymbol, void **ppvValue)
{
PRTLDRMODNATIVE pModNative = (PRTLDRMODNATIVE)pMod;
#ifdef RT_OS_OS2
/* Prefix the symbol with an underscore (assuming __cdecl/gcc-default). */
size_t cch = strlen(pszSymbol);
char *psz = (char *)alloca(cch + 2);
psz[0] = '_';
memcpy(psz + 1, pszSymbol, cch + 1);
pszSymbol = psz;
#endif
*ppvValue = dlsym((void *)pModNative->hNative, pszSymbol);
if (*ppvValue)
return VINF_SUCCESS;
return VERR_SYMBOL_NOT_FOUND;
}
DECLCALLBACK(int) rtldrNativeClose(PRTLDRMODINTERNAL pMod)
{
PRTLDRMODNATIVE pModNative = (PRTLDRMODNATIVE)pMod;
#ifdef __SANITIZE_ADDRESS__
/* If we are compiled with enabled address sanitizer (gcc/llvm), don't
* unload the module to prevent <unknown module> in the stack trace */
pModNative->fFlags |= RTLDRLOAD_FLAGS_NO_UNLOAD;
#endif
if ( (pModNative->fFlags & RTLDRLOAD_FLAGS_NO_UNLOAD)
|| !dlclose((void *)pModNative->hNative))
{
pModNative->hNative = (uintptr_t)0;
return VINF_SUCCESS;
}
Log(("rtldrNativeFree: dlclose(%p) failed: %s\n", pModNative->hNative, dlerror()));
return VERR_GENERAL_FAILURE;
}
DECLHIDDEN(int) rtldrNativeLoadSystem(const char *pszFilename, const char *pszExt, uint32_t fFlags, PRTLDRMOD phLdrMod)
{
RT_NOREF_PV(pszFilename); RT_NOREF_PV(pszExt); RT_NOREF_PV(fFlags); RT_NOREF_PV(phLdrMod);
/** @todo implement this in some sensible fashion. */
return VERR_NOT_SUPPORTED;
}
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