diff options
Diffstat (limited to 'src/VBox/Runtime/testcase/tstLdr.cpp')
| -rw-r--r-- | src/VBox/Runtime/testcase/tstLdr.cpp | 351 |
1 files changed, 351 insertions, 0 deletions
diff --git a/src/VBox/Runtime/testcase/tstLdr.cpp b/src/VBox/Runtime/testcase/tstLdr.cpp new file mode 100644 index 00000000..473eb3c7 --- /dev/null +++ b/src/VBox/Runtime/testcase/tstLdr.cpp @@ -0,0 +1,351 @@ +/* $Id: tstLdr.cpp $ */ +/** @file + * IPRT - Testcase for parts of RTLdr*. + */ + +/* + * Copyright (C) 2006-2020 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE 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. + */ + + +/********************************************************************************************************************************* +* 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; +} |