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/* $Id: tstLdr-2.cpp $ */
/** @file
* IPRT - Testcase for parts of RTLdr*, manual inspection.
*/
/*
* 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/ldr.h>
#include <iprt/alloc.h>
#include <iprt/stream.h>
#include <iprt/assert.h>
#include <iprt/initterm.h>
#include <VBox/dis.h>
#include <iprt/errcore.h>
#include <iprt/string.h>
bool MyDisBlock(uint8_t const *pbCodeBlock, int32_t cbMax)
{
DISCPUSTATE Cpu;
int32_t i = 0;
while (i < cbMax)
{
char szOutput[256];
uint32_t cbInstr;
if (RT_FAILURE(DISInstrToStr(pbCodeBlock + i, DISCPUMODE_32BIT, &Cpu, &cbInstr, szOutput, sizeof(szOutput))))
return false;
RTPrintf("%s", szOutput);
/* next */
i += cbInstr;
}
return true;
}
/**
* Resolve an external symbol during RTLdrGetBits().
*
* @returns iprt status code.
* @param hLdrMod The loader module handle.
* @param pszModule Module name.
* @param pszSymbol Symbol name, NULL if uSymbol should be used.
* @param uSymbol Symbol ordinal, ~0 if pszSymbol should be used.
* @param pValue Where to store the symbol value (address).
* @param pvUser User argument.
*/
static DECLCALLBACK(int) testGetImport(RTLDRMOD hLdrMod, const char *pszModule, const char *pszSymbol, unsigned uSymbol,
RTUINTPTR *pValue, void *pvUser)
{
RT_NOREF5(hLdrMod, pszModule, pszSymbol, uSymbol, pvUser);
/* check the name format and only permit certain names */
*pValue = 0xf0f0f0f0;
return VINF_SUCCESS;
}
/**
* One test iteration with one file.
*
* The test is very simple, we load the file three times
* into two different regions. The first two into each of the
* regions the for compare usage. The third is loaded into one
* and then relocated between the two and other locations a few times.
*
* @returns number of errors.
* @param pszFilename The file to load the mess with.
*/
static int testLdrOne(const char *pszFilename)
{
RTERRINFOSTATIC ErrInfo;
RTLDRMOD hLdrMod;
int rc = RTLdrOpenEx(pszFilename, 0, RTLDRARCH_WHATEVER, &hLdrMod, RTErrInfoInitStatic(&ErrInfo));
if (RT_FAILURE(rc))
{
RTPrintf("tstLdr: Failed to open '%s', rc=%Rrc. aborting test.\n", pszFilename, rc);
if (ErrInfo.szMsg[0])
RTPrintf("tstLdr: %s\n", ErrInfo.szMsg);
Assert(hLdrMod == NIL_RTLDRMOD);
return 1;
}
int rcRet = 1;
size_t cb = RTLdrSize(hLdrMod);
if (cb > 100)
{
void *pvBits = RTMemAlloc(cb);
if (pvBits)
{
RTUINTPTR Addr = 0xc0000000;
rc = RTLdrGetBits(hLdrMod, pvBits, Addr, testGetImport, NULL);
if (RT_SUCCESS(rc))
{
RTUINTPTR Value;
rc = RTLdrGetSymbolEx(hLdrMod, pvBits, Addr, UINT32_MAX, "Entrypoint", &Value);
if (RT_SUCCESS(rc))
{
unsigned off = Value - Addr;
if (off < cb)
{
if (MyDisBlock((uint8_t *)pvBits + off, Addr - (uintptr_t)pvBits))
{
RTUINTPTR Addr2 = 0xd0000000;
rc = RTLdrRelocate(hLdrMod, pvBits, Addr2, Addr, testGetImport, NULL);
if (RT_SUCCESS(rc))
{
if (MyDisBlock((uint8_t *)pvBits + off, Addr2 - (uintptr_t)pvBits))
rcRet = 0;
else
RTPrintf("tstLdr: Disassembly failed!\n");
}
else
RTPrintf("tstLdr: Relocate of '%s' from %#x to %#x failed, rc=%Rrc. Aborting test.\n",
pszFilename, Addr2, Addr, rc);
}
else
RTPrintf("tstLdr: Disassembly failed!\n");
}
else
RTPrintf("tstLdr: Invalid value for symbol '%s' in '%s'. off=%#x Value=%#x\n",
"Entrypoint", pszFilename, off, Value);
}
else
RTPrintf("tstLdr: Failed to resolve symbol '%s' in '%s', rc=%Rrc.\n", "Entrypoint", pszFilename, rc);
}
else
RTPrintf("tstLdr: Failed to get bits for '%s', rc=%Rrc. aborting test\n", pszFilename, rc);
RTMemFree(pvBits);
}
else
RTPrintf("tstLdr: Out of memory '%s' cb=%d. aborting test.\n", pszFilename, cb);
}
else
RTPrintf("tstLdr: Size is odd, '%s'. aborting test.\n", pszFilename);
/* cleanup */
rc = RTLdrClose(hLdrMod);
if (RT_FAILURE(rc))
{
RTPrintf("tstLdr: Failed to close '%s', rc=%Rrc.\n", pszFilename, rc);
rcRet++;
}
return rcRet;
}
int main(int argc, char **argv)
{
RTR3InitExe(argc, &argv, 0);
int rcRet = 0;
if (argc <= 1)
{
RTPrintf("usage: %s <module> [more modules]\n", argv[0]);
return 1;
}
/*
* Iterate the files.
*/
for (int argi = 1; argi < argc; argi++)
{
RTPrintf("tstLdr: TESTING '%s'...\n", argv[argi]);
rcRet += testLdrOne(argv[argi]);
}
/*
* Test result summary.
*/
if (!rcRet)
RTPrintf("tstLdr: SUCCESS\n");
else
RTPrintf("tstLdr: FAILURE - %d errors\n", rcRet);
return !!rcRet;
}
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