| 1 | /* $Id: tstLdr-2.cpp 99775 2023-05-12 12:21:58Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Testcase for parts of RTLdr*, manual inspection.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #include <iprt/ldr.h>
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| 42 | #include <iprt/alloc.h>
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| 43 | #include <iprt/stream.h>
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| 44 | #include <iprt/assert.h>
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| 45 | #include <iprt/initterm.h>
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| 46 | #include <VBox/dis.h>
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| 47 | #include <iprt/errcore.h>
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| 48 | #include <iprt/string.h>
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| 49 |
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| 50 |
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| 51 | static bool MyDisBlock(uint8_t const *pbCodeBlock, int32_t cbMax)
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| 52 | {
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| 53 | DISSTATE Dis;
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| 54 | int32_t i = 0;
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| 55 | while (i < cbMax)
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| 56 | {
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| 57 | char szOutput[256];
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| 58 | uint32_t cbInstr;
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| 59 | if (RT_FAILURE(DISInstrToStr(pbCodeBlock + i, DISCPUMODE_32BIT, &Dis, &cbInstr, szOutput, sizeof(szOutput))))
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| 60 | return false;
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| 61 |
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| 62 | RTPrintf("%s", szOutput);
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| 63 |
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| 64 | /* next */
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| 65 | i += cbInstr;
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| 66 | }
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| 67 | return true;
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| 68 | }
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| 69 |
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| 70 |
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| 71 |
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| 72 | /**
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| 73 | * Resolve an external symbol during RTLdrGetBits().
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| 74 | *
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| 75 | * @returns iprt status code.
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| 76 | * @param hLdrMod The loader module handle.
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| 77 | * @param pszModule Module name.
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| 78 | * @param pszSymbol Symbol name, NULL if uSymbol should be used.
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| 79 | * @param uSymbol Symbol ordinal, ~0 if pszSymbol should be used.
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| 80 | * @param pValue Where to store the symbol value (address).
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| 81 | * @param pvUser User argument.
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| 82 | */
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| 83 | static DECLCALLBACK(int) testGetImport(RTLDRMOD hLdrMod, const char *pszModule, const char *pszSymbol, unsigned uSymbol,
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| 84 | RTUINTPTR *pValue, void *pvUser)
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| 85 | {
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| 86 | RT_NOREF5(hLdrMod, pszModule, pszSymbol, uSymbol, pvUser);
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| 87 | /* check the name format and only permit certain names */
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| 88 | *pValue = 0xf0f0f0f0;
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| 89 | return VINF_SUCCESS;
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| 90 | }
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| 91 |
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| 92 |
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| 93 | /**
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| 94 | * One test iteration with one file.
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| 95 | *
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| 96 | * The test is very simple, we load the file three times
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| 97 | * into two different regions. The first two into each of the
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| 98 | * regions the for compare usage. The third is loaded into one
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| 99 | * and then relocated between the two and other locations a few times.
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| 100 | *
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| 101 | * @returns number of errors.
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| 102 | * @param pszFilename The file to load the mess with.
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| 103 | */
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| 104 | static int testLdrOne(const char *pszFilename)
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| 105 | {
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| 106 | RTERRINFOSTATIC ErrInfo;
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| 107 | RTLDRMOD hLdrMod;
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| 108 | int rc = RTLdrOpenEx(pszFilename, 0, RTLDRARCH_WHATEVER, &hLdrMod, RTErrInfoInitStatic(&ErrInfo));
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| 109 | if (RT_FAILURE(rc))
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| 110 | {
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| 111 | RTPrintf("tstLdr: Failed to open '%s', rc=%Rrc. aborting test.\n", pszFilename, rc);
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| 112 | if (ErrInfo.szMsg[0])
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| 113 | RTPrintf("tstLdr: %s\n", ErrInfo.szMsg);
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| 114 | Assert(hLdrMod == NIL_RTLDRMOD);
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| 115 | return 1;
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| 116 | }
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| 117 |
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| 118 | int rcRet = 1;
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| 119 | size_t cb = RTLdrSize(hLdrMod);
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| 120 | if (cb > 100)
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| 121 | {
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| 122 | void *pvBits = RTMemAlloc(cb);
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| 123 | if (pvBits)
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| 124 | {
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| 125 | RTUINTPTR Addr = 0xc0000000;
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| 126 | rc = RTLdrGetBits(hLdrMod, pvBits, Addr, testGetImport, NULL);
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| 127 | if (RT_SUCCESS(rc))
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| 128 | {
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| 129 | RTUINTPTR Value;
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| 130 | rc = RTLdrGetSymbolEx(hLdrMod, pvBits, Addr, UINT32_MAX, "Entrypoint", &Value);
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| 131 | if (RT_SUCCESS(rc))
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| 132 | {
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| 133 | unsigned off = Value - Addr;
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| 134 | if (off < cb)
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| 135 | {
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| 136 | if (MyDisBlock((uint8_t *)pvBits + off, Addr - (uintptr_t)pvBits))
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| 137 | {
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| 138 | RTUINTPTR Addr2 = 0xd0000000;
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| 139 | rc = RTLdrRelocate(hLdrMod, pvBits, Addr2, Addr, testGetImport, NULL);
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| 140 | if (RT_SUCCESS(rc))
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| 141 | {
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| 142 | if (MyDisBlock((uint8_t *)pvBits + off, Addr2 - (uintptr_t)pvBits))
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| 143 | rcRet = 0;
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| 144 | else
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| 145 | RTPrintf("tstLdr: Disassembly failed!\n");
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| 146 | }
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| 147 | else
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| 148 | RTPrintf("tstLdr: Relocate of '%s' from %#x to %#x failed, rc=%Rrc. Aborting test.\n",
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| 149 | pszFilename, Addr2, Addr, rc);
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| 150 | }
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| 151 | else
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| 152 | RTPrintf("tstLdr: Disassembly failed!\n");
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| 153 | }
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| 154 | else
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| 155 | RTPrintf("tstLdr: Invalid value for symbol '%s' in '%s'. off=%#x Value=%#x\n",
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| 156 | "Entrypoint", pszFilename, off, Value);
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| 157 | }
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| 158 | else
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| 159 | RTPrintf("tstLdr: Failed to resolve symbol '%s' in '%s', rc=%Rrc.\n", "Entrypoint", pszFilename, rc);
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| 160 | }
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| 161 | else
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| 162 | RTPrintf("tstLdr: Failed to get bits for '%s', rc=%Rrc. aborting test\n", pszFilename, rc);
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| 163 | RTMemFree(pvBits);
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| 164 | }
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| 165 | else
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| 166 | RTPrintf("tstLdr: Out of memory '%s' cb=%d. aborting test.\n", pszFilename, cb);
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| 167 | }
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| 168 | else
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| 169 | RTPrintf("tstLdr: Size is odd, '%s'. aborting test.\n", pszFilename);
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| 170 |
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| 171 |
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| 172 | /* cleanup */
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| 173 | rc = RTLdrClose(hLdrMod);
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| 174 | if (RT_FAILURE(rc))
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| 175 | {
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| 176 | RTPrintf("tstLdr: Failed to close '%s', rc=%Rrc.\n", pszFilename, rc);
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| 177 | rcRet++;
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| 178 | }
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| 179 |
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| 180 | return rcRet;
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| 181 | }
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| 182 |
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| 183 |
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| 184 |
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| 185 | int main(int argc, char **argv)
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| 186 | {
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| 187 | RTR3InitExe(argc, &argv, 0);
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| 188 |
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| 189 | int rcRet = 0;
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| 190 | if (argc <= 1)
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| 191 | {
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| 192 | RTPrintf("usage: %s <module> [more modules]\n", argv[0]);
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| 193 | return 1;
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| 194 | }
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| 195 |
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| 196 | /*
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| 197 | * Iterate the files.
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| 198 | */
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| 199 | for (int argi = 1; argi < argc; argi++)
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| 200 | {
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| 201 | RTPrintf("tstLdr: TESTING '%s'...\n", argv[argi]);
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| 202 | rcRet += testLdrOne(argv[argi]);
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| 203 | }
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| 204 |
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| 205 | /*
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| 206 | * Test result summary.
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| 207 | */
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| 208 | if (!rcRet)
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| 209 | RTPrintf("tstLdr: SUCCESS\n");
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| 210 | else
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| 211 | RTPrintf("tstLdr: FAILURE - %d errors\n", rcRet);
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| 212 | return !!rcRet;
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| 213 | }
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