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|
/* $Id: tstLdr.cpp $ */
/** @file
* IPRT - Testcase for parts of RTLdr*.
*/
/*
* 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 <iprt/errcore.h>
#include <iprt/string.h>
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
/** If set, don't bitch when failing to resolve symbols. */
static bool g_fDontBitchOnResolveFailure = false;
/** Whether it's kernel model code or not.. */
static bool g_fKernel = true;
/** Module architecture bit count. */
static uint32_t g_cBits = HC_ARCH_BITS;
/**
* 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)
{
/* check the name format and only permit certain names... later, right? */
RT_NOREF_PV(hLdrMod); RT_NOREF_PV(pszModule); RT_NOREF_PV(pszSymbol); RT_NOREF_PV(uSymbol); RT_NOREF_PV(pvUser);
if (g_cBits == 32)
*pValue = 0xabcdef0f;
else
{
RTUINTPTR BaseAddr = *(PCRTUINTPTR)pvUser;
if (g_fKernel)
*pValue = BaseAddr & RT_BIT(31) ? -(int32_t)0x76634935 : 0x7f304938;
else
*pValue = (int32_t)0x76634935 * ((BaseAddr >> 8) & 7);
}
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)
{
int rcRet = 0;
size_t cbImage = 0;
struct Load
{
RTLDRMOD hLdrMod;
void *pvBits;
RTUINTPTR Addr;
const char *pszName;
} aLoads[6] =
{
{ NULL, NULL, (RTUINTPTR)0xefefef00, "foo" },
{ NULL, NULL, (RTUINTPTR)0x40404040, "bar" },
{ NULL, NULL, (RTUINTPTR)0xefefef00, "foobar" },
};
unsigned i;
/*
* Load them.
*/
for (i = 0; i < RT_ELEMENTS(aLoads); i++)
{
/* adjust load address and announce our intentions */
if (g_cBits == 32)
aLoads[i].Addr &= UINT32_C(0xffffffff);
RTPrintf("tstLdr: Loading image at %RTptr\n", aLoads[i].Addr);
/* open it */
int rc = RTLdrOpen(pszFilename, 0, RTLDRARCH_WHATEVER, &aLoads[i].hLdrMod);
if (RT_FAILURE(rc))
{
RTPrintf("tstLdr: Failed to open '%s'/%d, rc=%Rrc. aborting test.\n", pszFilename, i, rc);
Assert(aLoads[i].hLdrMod == NIL_RTLDRMOD);
rcRet++;
break;
}
/* size it */
size_t cb = RTLdrSize(aLoads[i].hLdrMod);
if (cbImage && cb != cbImage)
{
RTPrintf("tstLdr: Size mismatch '%s'/%d. aborting test.\n", pszFilename, i);
rcRet++;
break;
}
cbImage = cb;
/* Allocate bits. */
aLoads[i].pvBits = RTMemAlloc(cb);
if (!aLoads[i].pvBits)
{
RTPrintf("tstLdr: Out of memory '%s'/%d cbImage=%d. aborting test.\n", pszFilename, i, cbImage);
rcRet++;
break;
}
/* Get the bits. */
rc = RTLdrGetBits(aLoads[i].hLdrMod, aLoads[i].pvBits, aLoads[i].Addr, testGetImport, &aLoads[i].Addr);
if (RT_FAILURE(rc))
{
RTPrintf("tstLdr: Failed to get bits for '%s'/%d, rc=%Rrc. aborting test\n", pszFilename, i, rc);
rcRet++;
break;
}
}
/*
* Continue with the relocations and symbol resolving.
*/
if (!rcRet)
{
static RTUINTPTR aRels[] =
{
(RTUINTPTR)0xefefef00, /* same. */
(RTUINTPTR)0x40404040, /* the other. */
(RTUINTPTR)0xefefef00, /* back. */
(RTUINTPTR)0x40404040, /* the other. */
(RTUINTPTR)0xefefef00, /* back again. */
(RTUINTPTR)0x77773420, /* somewhere entirely else. */
(RTUINTPTR)0xf0000000, /* somewhere entirely else. */
(RTUINTPTR)0x40404040, /* the other. */
(RTUINTPTR)0xefefef00 /* back again. */
};
struct Symbols
{
/** The symbol offset. -1 indicates the first time. */
unsigned off;
/** The symbol name. */
const char *pszName;
} aSyms[] =
{
{ ~0U, "Entrypoint" },
{ ~0U, "SomeExportFunction1" },
{ ~0U, "SomeExportFunction2" },
{ ~0U, "SomeExportFunction3" },
{ ~0U, "SomeExportFunction4" },
{ ~0U, "SomeExportFunction5" },
{ ~0U, "SomeExportFunction5" },
{ ~0U, "DISCoreOne" }
};
unsigned iRel = 0;
for (;;)
{
/* Compare all which are at the same address. */
for (i = 0; i < RT_ELEMENTS(aLoads) - 1; i++)
{
for (unsigned j = i + 1; j < RT_ELEMENTS(aLoads); j++)
{
if (aLoads[j].Addr == aLoads[i].Addr)
{
if (memcmp(aLoads[j].pvBits, aLoads[i].pvBits, cbImage))
{
RTPrintf("tstLdr: Mismatch between load %d and %d. ('%s')\n", j, i, pszFilename);
#if 1
const uint8_t *pu8J = (const uint8_t *)aLoads[j].pvBits;
const uint8_t *pu8I = (const uint8_t *)aLoads[i].pvBits;
for (uint32_t off = 0; off < cbImage; off++, pu8J++, pu8I++)
if (*pu8J != *pu8I)
RTPrintf(" %08x %02x != %02x\n", off, *pu8J, *pu8I);
#else
const uint32_t *pu32J = (const uint32_t *)aLoads[j].pvBits;
const uint32_t *pu32I = (const uint32_t *)aLoads[i].pvBits;
for (uint32_t off = 0; off < cbImage; off += 4, pu32J++, pu32I++)
if (*pu32J != *pu32I)
RTPrintf(" %08x %08x != %08x\n", off, *pu32J, *pu32I);
#endif
rcRet++;
break;
}
}
}
}
/* compare symbols. */
for (i = 0; i < RT_ELEMENTS(aLoads); i++)
{
for (unsigned iSym = 0; iSym < RT_ELEMENTS(aSyms); iSym++)
{
RTUINTPTR Value;
int rc = RTLdrGetSymbolEx(aLoads[i].hLdrMod, aLoads[i].pvBits, aLoads[i].Addr,
UINT32_MAX, aSyms[iSym].pszName, &Value);
if (RT_SUCCESS(rc))
{
unsigned off = Value - aLoads[i].Addr;
if (off < cbImage)
{
if (aSyms[iSym].off == ~0U)
aSyms[iSym].off = off;
else if (off != aSyms[iSym].off)
{
RTPrintf("tstLdr: Mismatching symbol '%s' in '%s'/%d. expected off=%d got %d\n",
aSyms[iSym].pszName, pszFilename, i, aSyms[iSym].off, off);
rcRet++;
}
}
else
{
RTPrintf("tstLdr: Invalid value for symbol '%s' in '%s'/%d. off=%#x Value=%#x\n",
aSyms[iSym].pszName, pszFilename, i, off, Value);
rcRet++;
}
}
else if (!g_fDontBitchOnResolveFailure)
{
RTPrintf("tstLdr: Failed to resolve symbol '%s' in '%s'/%d.\n", aSyms[iSym].pszName, pszFilename, i);
rcRet++;
}
}
}
if (iRel >= RT_ELEMENTS(aRels))
break;
/* adjust load address and announce our intentions */
if (g_cBits == 32)
aRels[iRel] &= UINT32_C(0xffffffff);
/* relocate it stuff. */
RTPrintf("tstLdr: Relocating image 2 from %RTptr to %RTptr\n", aLoads[2].Addr, aRels[iRel]);
int rc = RTLdrRelocate(aLoads[2].hLdrMod, aLoads[2].pvBits, aRels[iRel], aLoads[2].Addr, testGetImport, &aRels[iRel]);
if (RT_FAILURE(rc))
{
RTPrintf("tstLdr: Relocate of '%s' from %#x to %#x failed, rc=%Rrc. Aborting test.\n",
pszFilename, aRels[iRel], aLoads[2].Addr, rc);
rcRet++;
break;
}
aLoads[2].Addr = aRels[iRel];
/* next */
iRel++;
}
}
/*
* Clean up.
*/
for (i = 0; i < RT_ELEMENTS(aLoads); i++)
{
if (aLoads[i].pvBits)
RTMemFree(aLoads[i].pvBits);
if (aLoads[i].hLdrMod)
{
int rc = RTLdrClose(aLoads[i].hLdrMod);
if (RT_FAILURE(rc))
{
RTPrintf("tstLdr: Failed to close '%s' i=%d, rc=%Rrc.\n", pszFilename, i, rc);
rcRet++;
}
}
}
return rcRet;
}
int main(int argc, char **argv)
{
RTR3InitExe(argc, &argv, 0);
int rcRet = 0;
if (argc <= 1)
{
RTPrintf("usage: %s [-32|-64] [-kernel] <module> [more options/modules]\n", argv[0]);
return 1;
}
/*
* Iterate the files.
*/
for (int argi = 1; argi < argc; argi++)
{
if (!strcmp(argv[argi], "-n"))
g_fDontBitchOnResolveFailure = true;
else if (!strcmp(argv[argi], "-32"))
g_cBits = 32;
else if (!strcmp(argv[argi], "-64"))
g_cBits = 64;
else if (!strcmp(argv[argi], "-kernel"))
g_fKernel = true;
else
{
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;
}
|
