| 1 | /* $Id: tstLdr-2.cpp 82968 2020-02-04 10:35:17Z 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) 2006-2020 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include <iprt/ldr.h>
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| 32 | #include <iprt/alloc.h>
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| 33 | #include <iprt/stream.h>
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| 34 | #include <iprt/assert.h>
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| 35 | #include <iprt/initterm.h>
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| 36 | #include <VBox/dis.h>
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| 37 | #include <iprt/errcore.h>
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| 38 | #include <iprt/string.h>
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| 39 |
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| 40 |
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| 41 | bool MyDisBlock(uint8_t const *pbCodeBlock, int32_t cbMax)
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| 42 | {
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| 43 | DISCPUSTATE Cpu;
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| 44 | int32_t i = 0;
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| 45 | while (i < cbMax)
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| 46 | {
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| 47 | char szOutput[256];
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| 48 | uint32_t cbInstr;
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| 49 | if (RT_FAILURE(DISInstrToStr(pbCodeBlock + i, DISCPUMODE_32BIT, &Cpu, &cbInstr, szOutput, sizeof(szOutput))))
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| 50 | return false;
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| 51 |
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| 52 | RTPrintf("%s", szOutput);
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| 53 |
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| 54 | /* next */
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| 55 | i += cbInstr;
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| 56 | }
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| 57 | return true;
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| 58 | }
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| 59 |
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| 60 |
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| 61 |
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| 62 | /**
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| 63 | * Resolve an external symbol during RTLdrGetBits().
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| 64 | *
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| 65 | * @returns iprt status code.
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| 66 | * @param hLdrMod The loader module handle.
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| 67 | * @param pszModule Module name.
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| 68 | * @param pszSymbol Symbol name, NULL if uSymbol should be used.
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| 69 | * @param uSymbol Symbol ordinal, ~0 if pszSymbol should be used.
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| 70 | * @param pValue Where to store the symbol value (address).
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| 71 | * @param pvUser User argument.
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| 72 | */
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| 73 | static DECLCALLBACK(int) testGetImport(RTLDRMOD hLdrMod, const char *pszModule, const char *pszSymbol, unsigned uSymbol,
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| 74 | RTUINTPTR *pValue, void *pvUser)
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| 75 | {
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| 76 | RT_NOREF5(hLdrMod, pszModule, pszSymbol, uSymbol, pvUser);
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| 77 | /* check the name format and only permit certain names */
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| 78 | *pValue = 0xf0f0f0f0;
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| 79 | return VINF_SUCCESS;
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| 80 | }
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| 81 |
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| 82 |
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| 83 | /**
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| 84 | * One test iteration with one file.
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| 85 | *
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| 86 | * The test is very simple, we load the file three times
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| 87 | * into two different regions. The first two into each of the
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| 88 | * regions the for compare usage. The third is loaded into one
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| 89 | * and then relocated between the two and other locations a few times.
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| 90 | *
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| 91 | * @returns number of errors.
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| 92 | * @param pszFilename The file to load the mess with.
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| 93 | */
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| 94 | static int testLdrOne(const char *pszFilename)
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| 95 | {
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| 96 | RTERRINFOSTATIC ErrInfo;
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| 97 | RTLDRMOD hLdrMod;
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| 98 | int rc = RTLdrOpenEx(pszFilename, 0, RTLDRARCH_WHATEVER, &hLdrMod, RTErrInfoInitStatic(&ErrInfo));
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| 99 | if (RT_FAILURE(rc))
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| 100 | {
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| 101 | RTPrintf("tstLdr: Failed to open '%s', rc=%Rrc. aborting test.\n", pszFilename, rc);
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| 102 | if (ErrInfo.szMsg[0])
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| 103 | RTPrintf("tstLdr: %s\n", ErrInfo.szMsg);
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| 104 | Assert(hLdrMod == NIL_RTLDRMOD);
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| 105 | return 1;
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| 106 | }
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| 107 |
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| 108 | int rcRet = 1;
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| 109 | size_t cb = RTLdrSize(hLdrMod);
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| 110 | if (cb > 100)
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| 111 | {
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| 112 | void *pvBits = RTMemAlloc(cb);
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| 113 | if (pvBits)
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| 114 | {
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| 115 | RTUINTPTR Addr = 0xc0000000;
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| 116 | rc = RTLdrGetBits(hLdrMod, pvBits, Addr, testGetImport, NULL);
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| 117 | if (RT_SUCCESS(rc))
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| 118 | {
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| 119 | RTUINTPTR Value;
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| 120 | rc = RTLdrGetSymbolEx(hLdrMod, pvBits, Addr, UINT32_MAX, "Entrypoint", &Value);
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| 121 | if (RT_SUCCESS(rc))
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| 122 | {
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| 123 | unsigned off = Value - Addr;
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| 124 | if (off < cb)
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| 125 | {
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| 126 | if (MyDisBlock((uint8_t *)pvBits + off, Addr - (uintptr_t)pvBits))
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| 127 | {
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| 128 | RTUINTPTR Addr2 = 0xd0000000;
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| 129 | rc = RTLdrRelocate(hLdrMod, pvBits, Addr2, Addr, testGetImport, NULL);
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| 130 | if (RT_SUCCESS(rc))
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| 131 | {
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| 132 | if (MyDisBlock((uint8_t *)pvBits + off, Addr2 - (uintptr_t)pvBits))
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| 133 | rcRet = 0;
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| 134 | else
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| 135 | RTPrintf("tstLdr: Disassembly failed!\n");
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| 136 | }
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| 137 | else
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| 138 | RTPrintf("tstLdr: Relocate of '%s' from %#x to %#x failed, rc=%Rrc. Aborting test.\n",
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| 139 | pszFilename, Addr2, Addr, rc);
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| 140 | }
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| 141 | else
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| 142 | RTPrintf("tstLdr: Disassembly failed!\n");
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| 143 | }
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| 144 | else
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| 145 | RTPrintf("tstLdr: Invalid value for symbol '%s' in '%s'. off=%#x Value=%#x\n",
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| 146 | "Entrypoint", pszFilename, off, Value);
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| 147 | }
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| 148 | else
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| 149 | RTPrintf("tstLdr: Failed to resolve symbol '%s' in '%s', rc=%Rrc.\n", "Entrypoint", pszFilename, rc);
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| 150 | }
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| 151 | else
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| 152 | RTPrintf("tstLdr: Failed to get bits for '%s', rc=%Rrc. aborting test\n", pszFilename, rc);
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| 153 | RTMemFree(pvBits);
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| 154 | }
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| 155 | else
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| 156 | RTPrintf("tstLdr: Out of memory '%s' cb=%d. aborting test.\n", pszFilename, cb);
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| 157 | }
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| 158 | else
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| 159 | RTPrintf("tstLdr: Size is odd, '%s'. aborting test.\n", pszFilename);
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| 160 |
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| 161 |
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| 162 | /* cleanup */
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| 163 | rc = RTLdrClose(hLdrMod);
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| 164 | if (RT_FAILURE(rc))
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| 165 | {
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| 166 | RTPrintf("tstLdr: Failed to close '%s', rc=%Rrc.\n", pszFilename, rc);
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| 167 | rcRet++;
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| 168 | }
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| 169 |
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| 170 | return rcRet;
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| 171 | }
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| 172 |
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| 173 |
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| 174 |
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| 175 | int main(int argc, char **argv)
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| 176 | {
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| 177 | RTR3InitExe(argc, &argv, 0);
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| 178 |
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| 179 | int rcRet = 0;
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| 180 | if (argc <= 1)
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| 181 | {
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| 182 | RTPrintf("usage: %s <module> [more modules]\n", argv[0]);
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| 183 | return 1;
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| 184 | }
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| 185 |
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| 186 | /*
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| 187 | * Iterate the files.
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| 188 | */
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| 189 | for (int argi = 1; argi < argc; argi++)
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| 190 | {
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| 191 | RTPrintf("tstLdr: TESTING '%s'...\n", argv[argi]);
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| 192 | rcRet += testLdrOne(argv[argi]);
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| 193 | }
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| 194 |
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| 195 | /*
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| 196 | * Test result summary.
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| 197 | */
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| 198 | if (!rcRet)
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| 199 | RTPrintf("tstLdr: SUCCESS\n");
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| 200 | else
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| 201 | RTPrintf("tstLdr: FAILURE - %d errors\n", rcRet);
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| 202 | return !!rcRet;
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| 203 | }
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