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/* $Id: tstLdr-3.cpp $ */
/** @file
* IPRT - Testcase for parts of RTLdr*, manual inspection.
*/
/*
* Copyright (C) 2006-2022 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/err.h>
#include <iprt/string.h>
#include <VBox/dis.h>
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
static RTUINTPTR g_uLoadAddr;
static RTLDRMOD g_hLdrMod;
static void *g_pvBits;
static uint8_t g_cBits;
static uint8_t g_fNearImports;
/**
* Current nearest symbol.
*/
typedef struct TESTNEARSYM
{
RTUINTPTR Addr;
struct TESTSYM
{
RTUINTPTR Value;
unsigned uSymbol;
char szName[512];
} aSyms[2];
} TESTNEARSYM, *PTESTNEARSYM;
/**
* Enumeration callback function used by RTLdrEnumSymbols().
*
* @returns iprt status code. Failure will stop the enumeration.
* @param hLdrMod The loader module handle.
* @param pszSymbol Symbol name. NULL if ordinal only.
* @param uSymbol Symbol ordinal, ~0 if not used.
* @param Value Symbol value.
* @param pvUser The user argument specified to RTLdrEnumSymbols().
*/
static DECLCALLBACK(int) testEnumSymbol2(RTLDRMOD hLdrMod, const char *pszSymbol, unsigned uSymbol, RTUINTPTR Value, void *pvUser)
{
RT_NOREF1(hLdrMod);
PTESTNEARSYM pSym = (PTESTNEARSYM)pvUser;
/* less or equal */
if ( Value <= pSym->Addr
&& ( Value > pSym->aSyms[0].Value
|| ( Value == pSym->aSyms[0].Value
&& !pSym->aSyms[0].szName[0]
&& pszSymbol
&& *pszSymbol
)
)
)
{
pSym->aSyms[0].Value = Value;
pSym->aSyms[0].uSymbol = uSymbol;
pSym->aSyms[0].szName[0] = '\0';
if (pszSymbol)
strncat(pSym->aSyms[0].szName, pszSymbol, sizeof(pSym->aSyms[0].szName)-1);
}
/* above */
if ( Value > pSym->Addr
&& ( Value < pSym->aSyms[1].Value
|| ( Value == pSym->aSyms[1].Value
&& !pSym->aSyms[1].szName[1]
&& pszSymbol
&& *pszSymbol
)
)
)
{
pSym->aSyms[1].Value = Value;
pSym->aSyms[1].uSymbol = uSymbol;
pSym->aSyms[1].szName[0] = '\0';
if (pszSymbol)
strncat(pSym->aSyms[1].szName, pszSymbol, sizeof(pSym->aSyms[1].szName)-1);
}
return VINF_SUCCESS;
}
static int FindNearSymbol(RTUINTPTR uAddr, PTESTNEARSYM pNearSym)
{
RT_ZERO(*pNearSym);
pNearSym->Addr = (RTUINTPTR)uAddr;
pNearSym->aSyms[1].Value = ~(RTUINTPTR)0;
int rc = RTLdrEnumSymbols(g_hLdrMod, RTLDR_ENUM_SYMBOL_FLAGS_ALL, g_pvBits, g_uLoadAddr, testEnumSymbol2, pNearSym);
if (RT_FAILURE(rc))
RTPrintf("tstLdr-3: Failed to enumerate symbols: %Rra\n", rc);
return rc;
}
static DECLCALLBACK(int) MyGetSymbol(PCDISCPUSTATE pCpu, uint32_t u32Sel, RTUINTPTR uAddress,
char *pszBuf, size_t cchBuf, RTINTPTR *poff,
void *pvUser)
{
RT_NOREF3(pCpu, u32Sel, pvUser);
if ( uAddress > RTLdrSize(g_hLdrMod) + g_uLoadAddr
|| uAddress < g_uLoadAddr)
return VERR_SYMBOL_NOT_FOUND;
TESTNEARSYM NearSym;
int rc = FindNearSymbol(uAddress, &NearSym);
if (RT_FAILURE(rc))
return rc;
RTStrCopy(pszBuf, cchBuf, NearSym.aSyms[0].szName);
*poff = uAddress - NearSym.aSyms[0].Value;
return VINF_SUCCESS;
}
/**
* @callback_method_impl{FNDISREADBYTES}
*/
static DECLCALLBACK(int) MyReadBytes(PDISCPUSTATE pDis, uint8_t offInstr, uint8_t cbMinRead, uint8_t cbMaxRead)
{
RT_NOREF1(cbMaxRead);
uint8_t const *pbSrc = (uint8_t const *)((uintptr_t)pDis->uInstrAddr + (uintptr_t)pDis->pvUser + offInstr);
memcpy(&pDis->abInstr[offInstr], pbSrc, cbMinRead);
pDis->cbCachedInstr = offInstr + cbMinRead;
return VINF_SUCCESS;
}
static bool MyDisBlock(DISCPUMODE enmCpuMode, RTHCUINTPTR pvCodeBlock, int32_t cbMax, RTUINTPTR off,
RTUINTPTR uNearAddr, RTUINTPTR uSearchAddr)
{
DISCPUSTATE Cpu;
int32_t i = 0;
while (i < cbMax)
{
bool fQuiet = RTAssertSetQuiet(true);
bool fMayPanic = RTAssertSetMayPanic(false);
char szOutput[256];
unsigned cbInstr;
int rc = DISInstrWithReader(uNearAddr + i, enmCpuMode,
MyReadBytes, (uint8_t *)pvCodeBlock - (uintptr_t)uNearAddr,
&Cpu, &cbInstr);
RTAssertSetMayPanic(fMayPanic);
RTAssertSetQuiet(fQuiet);
if (RT_FAILURE(rc))
return false;
TESTNEARSYM NearSym;
rc = FindNearSymbol(uNearAddr + i, &NearSym);
if (RT_SUCCESS(rc) && NearSym.aSyms[0].Value == NearSym.Addr)
RTPrintf("%s:\n", NearSym.aSyms[0].szName);
DISFormatYasmEx(&Cpu, szOutput, sizeof(szOutput),
DIS_FMT_FLAGS_RELATIVE_BRANCH | DIS_FMT_FLAGS_BYTES_RIGHT | DIS_FMT_FLAGS_ADDR_LEFT | DIS_FMT_FLAGS_BYTES_SPACED,
MyGetSymbol, NULL);
RTPrintf("%s\n", szOutput);
if (pvCodeBlock + i + off == uSearchAddr)
RTPrintf("^^^^^^^^\n");
/* 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);
RTUINTPTR BaseAddr = *(PCRTUINTPTR)pvUser;
if (g_fNearImports)
*pValue = BaseAddr + UINT32_C(0x604020f0);
else if ( BaseAddr < UINT64_C(0xffffff7f820df000) - _4G
|| BaseAddr > UINT64_C(0xffffff7f820df000) + _4G)
*pValue = UINT64_C(0xffffff7f820df000);
else
*pValue = UINT64_C(0xffffff7c820df000);
if (g_cBits == 32)
*pValue &= UINT32_MAX;
return VINF_SUCCESS;
}
static uint32_t g_iSegNo = 0;
static DECLCALLBACK(int) testEnumSegment1(RTLDRMOD hLdrMod, PCRTLDRSEG pSeg, void *pvUser)
{
if (hLdrMod != g_hLdrMod || pvUser != NULL)
return VERR_INTERNAL_ERROR_3;
RTPrintf("Seg#%02u: %RTptr LB %RTptr %s\n"
" link=%RTptr LB %RTptr align=%RTptr fProt=%#x offFile=%RTfoff\n"
, g_iSegNo++, pSeg->RVA, pSeg->cbMapped, pSeg->pszName,
pSeg->LinkAddress, pSeg->cb, pSeg->Alignment, pSeg->fProt, pSeg->offFile);
return VINF_SUCCESS;
}
/**
* Enumeration callback function used by RTLdrEnumSymbols().
*
* @returns iprt status code. Failure will stop the enumeration.
* @param hLdrMod The loader module handle.
* @param pszSymbol Symbol name. NULL if ordinal only.
* @param uSymbol Symbol ordinal, ~0 if not used.
* @param Value Symbol value.
* @param pvUser The user argument specified to RTLdrEnumSymbols().
*/
static DECLCALLBACK(int) testEnumSymbol1(RTLDRMOD hLdrMod, const char *pszSymbol, unsigned uSymbol, RTUINTPTR Value, void *pvUser)
{
if (hLdrMod != g_hLdrMod || pvUser != NULL)
return VERR_INTERNAL_ERROR_3;
RTPrintf(" %RTptr %s (%d)\n", Value, pszSymbol, uSymbol);
return VINF_SUCCESS;
}
static int testDisasNear(uint64_t uAddr)
{
TESTNEARSYM NearSym;
int rc = FindNearSymbol(uAddr, &NearSym);
if (RT_FAILURE(rc))
return rc;
RTPrintf("tstLdr-3: Addr=%RTptr\n"
"%RTptr %s (%d) - %RTptr %s (%d)\n",
NearSym.Addr,
NearSym.aSyms[0].Value, NearSym.aSyms[0].szName, NearSym.aSyms[0].uSymbol,
NearSym.aSyms[1].Value, NearSym.aSyms[1].szName, NearSym.aSyms[1].uSymbol);
if (NearSym.Addr - NearSym.aSyms[0].Value < 0x10000)
{
DISCPUMODE enmDisCpuMode = g_cBits == 32 ? DISCPUMODE_32BIT : DISCPUMODE_64BIT;
uint8_t *pbCode = (uint8_t *)g_pvBits + (NearSym.aSyms[0].Value - g_uLoadAddr);
MyDisBlock(enmDisCpuMode, (uintptr_t)pbCode,
RT_MAX(NearSym.aSyms[1].Value - NearSym.aSyms[0].Value, 0x20000),
NearSym.aSyms[0].Value - (uintptr_t)pbCode,
NearSym.aSyms[0].Value,
NearSym.Addr);
}
return VINF_SUCCESS;
}
int main(int argc, char **argv)
{
RTR3InitExe(argc, &argv, 0);
/*
* Module & code bitness (optional).
*/
g_cBits = ARCH_BITS;
#if !defined(RT_OS_WINDOWS) || defined(RT_OS_DARWIN)
g_fNearImports = false;
#else
g_fNearImports = true;
#endif
while (argc > 1)
{
if (!strcmp(argv[1], "--32"))
g_cBits = 32;
else if (!strcmp(argv[1], "--64"))
g_cBits = 64;
else if (!strcmp(argv[1], "--near-imports"))
g_fNearImports = true;
else if (!strcmp(argv[1], "--wide-imports"))
g_fNearImports = false;
else
break;
argc--;
argv++;
}
int rcRet = 0;
if (argc <= 2)
{
RTPrintf("usage: %s [--32|--64] [--<near|wide>-imports] <load-addr> <module> [addr1 []]\n", argv[0]);
return 1;
}
/*
* Load the module.
*/
RTERRINFOSTATIC ErrInfo;
g_uLoadAddr = (RTUINTPTR)RTStrToUInt64(argv[1]);
int rc = RTLdrOpenEx(argv[2], 0, RTLDRARCH_WHATEVER, &g_hLdrMod, RTErrInfoInitStatic(&ErrInfo));
if (RT_FAILURE(rc))
{
RTPrintf("tstLdr-3: Failed to open '%s': %Rra\n", argv[2], rc);
if (ErrInfo.szMsg[0])
RTPrintf("tstLdr-3: %s\n", ErrInfo.szMsg);
return 1;
}
g_pvBits = RTMemAlloc(RTLdrSize(g_hLdrMod));
rc = RTLdrGetBits(g_hLdrMod, g_pvBits, g_uLoadAddr, testGetImport, &g_uLoadAddr);
if (RT_SUCCESS(rc))
{
if ( argc == 4
&& argv[3][0] == '*')
{
/*
* Wildcard address mode.
*/
uint64_t uWild = RTStrToUInt64(&argv[3][1]);
uint64_t uIncrements = strchr(argv[3], '/') ? RTStrToUInt64(strchr(argv[3], '/') + 1) : 0x1000;
if (!uIncrements)
uIncrements = 0x1000;
uint64_t uMax = RTLdrSize(g_hLdrMod) + g_uLoadAddr;
for (uint64_t uCur = g_uLoadAddr + uWild; uCur < uMax; uCur += uIncrements)
testDisasNear(uCur);
}
else if (argc > 3)
{
/*
* User specified addresses within the module.
*/
for (int i = 3; i < argc; i++)
{
rc = testDisasNear(RTStrToUInt64(argv[i]));
if (RT_FAILURE(rc))
rcRet++;
}
}
else
{
/*
* Enumerate symbols.
*/
rc = RTLdrEnumSymbols(g_hLdrMod, RTLDR_ENUM_SYMBOL_FLAGS_ALL, g_pvBits, g_uLoadAddr, testEnumSymbol1, NULL);
if (RT_FAILURE(rc))
{
RTPrintf("tstLdr-3: Failed to enumerate symbols: %Rra\n", rc);
rcRet++;
}
/*
* Query various properties.
*/
union
{
char szName[256];
uint32_t iImpModule;
RTUUID Uuid;
} uBuf;
rc = RTLdrQueryProp(g_hLdrMod, RTLDRPROP_INTERNAL_NAME, &uBuf, sizeof(uBuf));
if (RT_SUCCESS(rc))
RTPrintf("tstLdr-3: Internal name: %s\n", uBuf.szName);
else if (rc != VERR_NOT_FOUND && rc != VERR_NOT_SUPPORTED)
{
RTPrintf("tstLdr-3: Internal name: failed - %Rrc\n", rc);
rcRet++;
}
uint32_t cImports = 0;
rc = RTLdrQueryProp(g_hLdrMod, RTLDRPROP_IMPORT_COUNT, &cImports, sizeof(cImports));
if (RT_SUCCESS(rc))
{
RTPrintf("tstLdr-3: Import count: %u\n", cImports);
for (uint32_t i = 0; i < cImports; i++)
{
uBuf.iImpModule = i;
rc = RTLdrQueryProp(g_hLdrMod, RTLDRPROP_IMPORT_MODULE, &uBuf, sizeof(uBuf));
if (RT_SUCCESS(rc))
RTPrintf("tstLdr-3: Import module #%u: %s\n", i, uBuf.szName);
else
{
RTPrintf("tstLdr-3: Import module #%u: failed - %Rrc\n", i, rc);
rcRet++;
}
}
}
else if (rc != VERR_NOT_FOUND && rc != VERR_NOT_SUPPORTED)
{
RTPrintf("tstLdr-3: Import count: failed - %Rrc\n", rc);
rcRet++;
}
rc = RTLdrQueryProp(g_hLdrMod, RTLDRPROP_UUID, &uBuf.Uuid, sizeof(uBuf.Uuid));
if (RT_SUCCESS(rc))
RTPrintf("tstLdr-3: UUID: %RTuuid\n", uBuf.Uuid);
else if (rc != VERR_NOT_FOUND && rc != VERR_NOT_SUPPORTED)
{
RTPrintf("tstLdr-3: UUID: failed - %Rrc\n", rc);
rcRet++;
}
/*
* Enumerate segments.
*/
RTPrintf("tstLdr-3: Segments:\n");
rc = RTLdrEnumSegments(g_hLdrMod, testEnumSegment1, NULL);
if (RT_FAILURE(rc))
{
RTPrintf("tstLdr-3: Failed to enumerate symbols: %Rra\n", rc);
rcRet++;
}
}
}
else
{
RTPrintf("tstLdr-3: Failed to get bits for '%s' at %RTptr: %Rra\n", argv[2], g_uLoadAddr, rc);
rcRet++;
}
RTMemFree(g_pvBits);
RTLdrClose(g_hLdrMod);
/*
* Test result summary.
*/
if (!rcRet)
RTPrintf("tstLdr-3: SUCCESS\n");
else
RTPrintf("tstLdr-3: FAILURE - %d errors\n", rcRet);
return !!rcRet;
}
|