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/* $Id: VBoxVMMPreload.cpp $ */
/** @file
* VBoxVMMPreload - Preload VBox the ring-0 modules.
*/
/*
* Copyright (C) 2012-2023 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>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/buildconfig.h>
#include <iprt/getopt.h>
#include <iprt/initterm.h>
#include <iprt/message.h>
#include <iprt/path.h>
#include <iprt/stream.h>
#include <iprt/string.h>
#include <iprt/thread.h>
#include <VBox/sup.h>
#include <VBox/version.h>
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
/**
* Known modules and their associated data (there are only known modules!).
*/
static struct
{
const char *pszName;
bool fPreload;
void *pvImageBase;
} g_aModules[] =
{
{ "VMMR0.r0", true, NULL },
{ "VBoxDDR0.r0", true, NULL },
};
static uint32_t g_cVerbose = 1;
static bool g_fLockDown = false;
/**
* Parses the options.
*
* @returns RTEXITCODE_SUCCESS on success.
* @param argc Argument count .
* @param argv Argument vector.
* @param pfExit Set to @c true if we should exit.
*/
static RTEXITCODE ParseOptions(int argc, char **argv, bool *pfExit)
{
/*
* Parse arguments.
*/
static const RTGETOPTDEF s_aOptions[] =
{
{ "--only", 'o', RTGETOPT_REQ_STRING },
{ "--quiet", 'q', RTGETOPT_REQ_NOTHING },
{ "--lock" , 'l', RTGETOPT_REQ_NOTHING },
{ "--verbose", 'v', RTGETOPT_REQ_NOTHING },
};
bool fAll = true;
int ch;
RTGETOPTUNION ValueUnion;
RTGETOPTSTATE GetState;
RTGetOptInit(&GetState, argc, argv, s_aOptions, RT_ELEMENTS(s_aOptions), 1, 0 /* fFlags */);
while ((ch = RTGetOpt(&GetState, &ValueUnion)))
{
switch(ch)
{
case 'o':
{
uint32_t i;
if (fAll)
{
fAll = false;
for (i = 0; i < RT_ELEMENTS(g_aModules); i++)
g_aModules[i].fPreload = false;
}
i = RT_ELEMENTS(g_aModules);
while (i-- > 0)
if (!strcmp(ValueUnion.psz, g_aModules[i].pszName))
{
g_aModules[i].fPreload = true;
break;
}
if (i > RT_ELEMENTS(g_aModules))
return RTMsgErrorExit(RTEXITCODE_FAILURE, "No known module '%s'", ValueUnion.psz);
break;
}
case 'v':
g_cVerbose++;
break;
case 'q':
g_cVerbose = 0;
break;
case 'l':
g_fLockDown = true;
break;
case 'h':
RTPrintf(VBOX_PRODUCT " VMM ring-0 Module Preloader Version " VBOX_VERSION_STRING
"Copyright (C) 2005-" VBOX_C_YEAR " " VBOX_VENDOR "\n"
"\n"
"Usage: VBoxVMMPreload [-hlqvV] [-o|--only <mod>]\n"
"\n");
*pfExit = true;
return RTEXITCODE_SUCCESS;
case 'V':
RTPrintf("%sr%s\n", RTBldCfgVersion(), RTBldCfgRevisionStr());
*pfExit = true;
return RTEXITCODE_SUCCESS;
default:
return RTGetOptPrintError(ch, &ValueUnion);
}
}
return RTEXITCODE_SUCCESS;
}
/**
* Loads the modules.
*
* @returns RTEXITCODE_SUCCESS on success.
*/
static RTEXITCODE LoadModules(void)
{
RTERRINFOSTATIC ErrInfo;
for (uint32_t i = 0; i < RT_ELEMENTS(g_aModules); i++)
{
if (g_aModules[i].fPreload)
{
char szPath[RTPATH_MAX];
int rc = RTPathAppPrivateArch(szPath, sizeof(szPath));
if (RT_SUCCESS(rc))
rc = RTPathAppend(szPath, sizeof(szPath), g_aModules[i].pszName);
if (RT_FAILURE(rc))
return RTMsgErrorExit(RTEXITCODE_FAILURE, "RTPathAppPrivateArch or RTPathAppend returned %Rrc", rc);
RTErrInfoInitStatic(&ErrInfo);
rc = SUPR3LoadModule(szPath, g_aModules[i].pszName, &g_aModules[i].pvImageBase, &ErrInfo.Core);
if (RT_FAILURE(rc))
return RTMsgErrorExit(RTEXITCODE_FAILURE, "SUPR3LoadModule failed for %s (%s): %s (rc=%Rrc)",
g_aModules[i].pszName, szPath, ErrInfo.Core.pszMsg, rc);
if (g_cVerbose >= 1)
RTMsgInfo("Loaded '%s' ('%s') at %p\n", szPath, g_aModules[i].pszName, g_aModules[i].pvImageBase);
}
}
if (g_fLockDown)
{
RTErrInfoInitStatic(&ErrInfo);
int rc = SUPR3LockDownLoader(&ErrInfo.Core);
if (RT_FAILURE(rc))
return RTMsgErrorExit(RTEXITCODE_FAILURE, "SUPR3LockDownLoader failed: %s (rc=%Rrc)",
ErrInfo.Core.pszMsg, rc);
if (g_cVerbose >= 1)
RTMsgInfo("Locked down module loader interface!\n");
}
RTStrmFlush(g_pStdOut);
return RTEXITCODE_SUCCESS;
}
/**
* Entry point.
*/
extern "C" DECLEXPORT(int) TrustedMain(int argc, char **argv, char **envp)
{
RT_NOREF1(envp);
bool fExit = false;
RTEXITCODE rcExit = ParseOptions(argc, argv, &fExit);
if (rcExit == RTEXITCODE_SUCCESS && !fExit)
{
rcExit = LoadModules();
if (rcExit == RTEXITCODE_SUCCESS)
{
for (;;)
RTThreadSleep(RT_INDEFINITE_WAIT);
}
}
return rcExit;
}
#ifndef VBOX_WITH_HARDENING
/**
* Main entry point.
*/
int main(int argc, char **argv, char **envp)
{
int rc = RTR3InitExe(argc, &argv, RTR3INIT_FLAGS_SUPLIB);
if (RT_SUCCESS(rc))
return TrustedMain(argc, argv, envp);
return RTMsgInitFailure(rc);
}
#endif /* !VBOX_WITH_HARDENING */
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