/* $Id: ldrEx.cpp 4071 2007-08-07 17:07:59Z vboxsync $ */ /** @file * innotek Portable Runtime - Binary Image Loader, Extended Features. */ /* * Copyright (C) 2006-2007 innotek GmbH * * 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 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. */ /******************************************************************************* * Header Files * *******************************************************************************/ #define LOG_GROUP RTLOGGROUP_LDR #include #include #include #include #include #include #include "internal/ldr.h" #include "internal/ldrMZ.h" /** * Open part with reader. * * @returns iprt status code. * @param pReader The loader reader instance which will provide the raw image bits. * @param phMod Where to store the handle. */ int rtldrOpenWithReader(PRTLDRREADER pReader, PRTLDRMOD phMod) { /* * Read and verify the file signature. */ union { char ach[4]; uint16_t au16[2]; uint32_t u32; } uSign; int rc = pReader->pfnRead(pReader, &uSign, sizeof(uSign), 0); if (RT_FAILURE(rc)) return rc; #ifndef LDR_WITH_KLDR if ( uSign.au16[0] != IMAGE_DOS_SIGNATURE && uSign.u32 != IMAGE_NT_SIGNATURE && uSign.u32 != IMAGE_ELF_SIGNATURE && uSign.au16[0] != IMAGE_LX_SIGNATURE) { Log(("rtldrOpenWithReader: %s: unknown magic %#x / '%.4s\n", pReader->pfnLogName(pReader), uSign.u32, &uSign.ach[0])); return VERR_INVALID_EXE_SIGNATURE; } #endif uint32_t offHdr = 0; if (uSign.au16[0] == IMAGE_DOS_SIGNATURE) { rc = pReader->pfnRead(pReader, &offHdr, sizeof(offHdr), RT_OFFSETOF(IMAGE_DOS_HEADER, e_lfanew)); if (RT_FAILURE(rc)) return rc; if (offHdr <= sizeof(IMAGE_DOS_HEADER)) { Log(("rtldrOpenWithReader: %s: no new header / invalid offset %#RX32\n", pReader->pfnLogName(pReader), offHdr)); return VERR_INVALID_EXE_SIGNATURE; } rc = pReader->pfnRead(pReader, &uSign, sizeof(uSign), offHdr); if (RT_FAILURE(rc)) return rc; if ( uSign.u32 != IMAGE_NT_SIGNATURE && uSign.au16[0] != IMAGE_LX_SIGNATURE && uSign.au16[0] != IMAGE_LE_SIGNATURE && uSign.au16[0] != IMAGE_NE_SIGNATURE) { Log(("rtldrOpenWithReader: %s: unknown new magic %#x / '%.4s\n", pReader->pfnLogName(pReader), uSign.u32, &uSign.ach[0])); return VERR_INVALID_EXE_SIGNATURE; } } /* * Create image intepreter instance depending on the signature. */ if (uSign.u32 == IMAGE_NT_SIGNATURE) #ifdef LDR_WITH_PE rc = rtldrPEOpen(pReader, offHdr, phMod); #else rc = VERR_PE_EXE_NOT_SUPPORTED; #endif else if (uSign.u32 == IMAGE_ELF_SIGNATURE) #if defined(LDR_WITH_ELF) rc = rtldrELFOpen(pReader, phMod); #else rc = VERR_ELF_EXE_NOT_SUPPORTED; #endif else if (uSign.au16[0] == IMAGE_LX_SIGNATURE) #ifdef LDR_WITH_LX rc = rtldrLXOpen(pReader, offHdr, phMod); #else rc = VERR_LX_EXE_NOT_SUPPORTED; #endif else if (uSign.au16[0] == IMAGE_LE_SIGNATURE) #ifdef LDR_WITH_LE rc = rtldrLEOpen(pReader, phMod); #else rc = VERR_LE_EXE_NOT_SUPPORTED; #endif else if (uSign.au16[0] == IMAGE_NE_SIGNATURE) #ifdef LDR_WITH_NE rc = rtldrNEOpen(pReader, phMod); #else rc = VERR_NE_EXE_NOT_SUPPORTED; #endif else if (uSign.au16[0] == IMAGE_DOS_SIGNATURE) #ifdef LDR_WITH_MZ rc = rtldrMZOpen(pReader, phMod); #else rc = VERR_MZ_EXE_NOT_SUPPORTED; #endif else if (/* uSign.u32 == IMAGE_AOUT_A_SIGNATURE || uSign.u32 == IMAGE_AOUT_Z_SIGNATURE*/ /** @todo find the aout magics in emx or binutils. */ 0) #ifdef LDR_WITH_AOUT rc = rtldrAOUTOpen(pReader, phMod); #else rc = VERR_AOUT_EXE_NOT_SUPPORTED; #endif else { #ifndef LDR_WITH_KLDR Log(("rtldrOpenWithReader: %s: the format isn't implemented %#x / '%.4s\n", pReader->pfnLogName(pReader), uSign.u32, &uSign.ach[0])); #endif rc = VERR_INVALID_EXE_SIGNATURE; } #ifdef LDR_WITH_KLDR /* Try kLdr if it's a format we don't recognize. */ if (rc <= VERR_INVALID_EXE_SIGNATURE && rc > VERR_BAD_EXE_FORMAT) rc = rtldrkLdrOpen(pReader, phMod); #endif LogFlow(("rtldrOpenWithReader: %s: returns %Rrc *phMod=%p\n", pReader->pfnLogName(pReader), rc, *phMod)); return rc; } /** * Gets the size of the loaded image. * This is only supported for modules which has been opened using RTLdrOpen() and RTLdrOpenBits(). * * @returns image size (in bytes). * @returns ~(size_t)0 on if not opened by RTLdrOpen(). * @param hLdrMod Handle to the loader module. * @remark Not supported for RTLdrLoad() images. */ RTDECL(size_t) RTLdrSize(RTLDRMOD hLdrMod) { LogFlow(("RTLdrSize: hLdrMod=%RTldrm\n", hLdrMod)); /* * Validate input. */ AssertMsgReturn(rtldrIsValid(hLdrMod), ("hLdrMod=%p\n", hLdrMod), ~(size_t)0); PRTLDRMODINTERNAL pMod = (PRTLDRMODINTERNAL)hLdrMod; AssertMsgReturn(pMod->eState == LDR_STATE_OPENED, ("eState=%d\n", pMod->eState), ~(size_t)0); /* * Do it. */ size_t cb = pMod->pOps->pfnGetImageSize(pMod); LogFlow(("RTLdrSize: returns %zu\n", cb)); return cb; } /** * Loads the image into a buffer provided by the user and applies fixups * for the given base address. * * @returns iprt status code. * @param hLdrMod The load module handle. * @param pvBits Where to put the bits. * Must be as large as RTLdrSize() suggests. * @param BaseAddress The base address. * @param pfnGetImport Callback function for resolving imports one by one. * @param pvUser User argument for the callback. * @remark Not supported for RTLdrLoad() images. */ RTDECL(int) RTLdrGetBits(RTLDRMOD hLdrMod, void *pvBits, RTUINTPTR BaseAddress, PFNRTLDRIMPORT pfnGetImport, void *pvUser) { LogFlow(("RTLdrGetBits: hLdrMod=%RTldrm pvBits=%p BaseAddress=%RTptr pfnGetImport=%p pvUser=%p\n", hLdrMod, pvBits, BaseAddress, pfnGetImport, pvUser)); /* * Validate input. */ AssertMsgReturn(rtldrIsValid(hLdrMod), ("hLdrMod=%p\n", hLdrMod), VERR_INVALID_HANDLE); AssertMsgReturn(VALID_PTR(pvBits), ("pvBits=%p\n", pvBits), VERR_INVALID_PARAMETER); AssertMsgReturn(VALID_PTR(pfnGetImport), ("pfnGetImport=%p\n", pfnGetImport), VERR_INVALID_PARAMETER); PRTLDRMODINTERNAL pMod = (PRTLDRMODINTERNAL)hLdrMod; AssertMsgReturn(pMod->eState == LDR_STATE_OPENED, ("eState=%d\n", pMod->eState), VERR_WRONG_ORDER); /* * Do it. */ int rc = pMod->pOps->pfnGetBits(pMod, pvBits, BaseAddress, pfnGetImport, pvUser); LogFlow(("RTLdrGetBits: returns %Rrc\n",rc)); return rc; } /** * Relocates bits after getting them. * Useful for code which moves around a bit. * * @returns iprt status code. * @param hLdrMod The loader module handle. * @param pvBits Where the image bits are. * Must've been passed to RTLdrGetBits(). * @param NewBaseAddress The new base address. * @param OldBaseAddress The old base address. * @param pfnGetImport Callback function for resolving imports one by one. * @param pvUser User argument for the callback. * @remark Not supported for RTLdrLoad() images. */ RTDECL(int) RTLdrRelocate(RTLDRMOD hLdrMod, void *pvBits, RTUINTPTR NewBaseAddress, RTUINTPTR OldBaseAddress, PFNRTLDRIMPORT pfnGetImport, void *pvUser) { LogFlow(("RTLdrRelocate: hLdrMod=%RTldrm pvBits=%p NewBaseAddress=%RTptr OldBaseAddress=%RTptr pfnGetImport=%p pvUser=%p\n", hLdrMod, pvBits, NewBaseAddress, OldBaseAddress, pfnGetImport, pvUser)); /* * Validate input. */ AssertMsgReturn(rtldrIsValid(hLdrMod), ("hLdrMod=%p\n", hLdrMod), VERR_INVALID_HANDLE); AssertMsgReturn(VALID_PTR(pvBits), ("pvBits=%p\n", pvBits), VERR_INVALID_PARAMETER); AssertMsgReturn(VALID_PTR(pfnGetImport), ("pfnGetImport=%p\n", pfnGetImport), VERR_INVALID_PARAMETER); PRTLDRMODINTERNAL pMod = (PRTLDRMODINTERNAL)hLdrMod; AssertMsgReturn(pMod->eState == LDR_STATE_OPENED, ("eState=%d\n", pMod->eState), VERR_WRONG_ORDER); /* * Do it. */ int rc = pMod->pOps->pfnRelocate(pMod, pvBits, NewBaseAddress, OldBaseAddress, pfnGetImport, pvUser); LogFlow(("RTLdrRelocate: returns %Vrc\n", rc)); return rc; } /** * Gets the address of a named exported symbol. * * This function differs from the plain one in that it can deal with * both GC and HC address sizes, and that it can calculate the symbol * value relative to any given base address. * * @returns iprt status code. * @param hLdrMod The loader module handle. * @param pvBits Optional pointer to the loaded image. * Set this to NULL if no RTLdrGetBits() processed image bits are available. * Not supported for RTLdrLoad() images and must be NULL. * @param BaseAddress Image load address. * Not supported for RTLdrLoad() images and must be 0. * @param pszSymbol Symbol name. * @param pValue Where to store the symbol value. */ RTDECL(int) RTLdrGetSymbolEx(RTLDRMOD hLdrMod, const void *pvBits, RTUINTPTR BaseAddress, const char *pszSymbol, RTUINTPTR *pValue) { LogFlow(("RTLdrGetSymbolEx: hLdrMod=%RTldrm pvBits=%p BaseAddress=%RTptr pszSymbol=%p:{%s} pValue\n", hLdrMod, pvBits, BaseAddress, pszSymbol, pszSymbol, pValue)); /* * Validate input. */ AssertMsgReturn(rtldrIsValid(hLdrMod), ("hLdrMod=%p\n", hLdrMod), VERR_INVALID_HANDLE); AssertMsgReturn(!pvBits || VALID_PTR(pvBits), ("pvBits=%p\n", pvBits), VERR_INVALID_PARAMETER); AssertMsgReturn(pszSymbol, ("pszSymbol=%p\n", pszSymbol), VERR_INVALID_PARAMETER); AssertMsgReturn(VALID_PTR(pValue), ("pValue=%p\n", pvBits), VERR_INVALID_PARAMETER); PRTLDRMODINTERNAL pMod = (PRTLDRMODINTERNAL)hLdrMod; //AssertMsgReturn(pMod->eState == LDR_STATE_OPENED, ("eState=%d\n", pMod->eState), VERR_WRONG_ORDER); /* * Do it. */ int rc; if (pMod->pOps->pfnGetSymbolEx) rc = pMod->pOps->pfnGetSymbolEx(pMod, pvBits, BaseAddress, pszSymbol, pValue); else if (!BaseAddress && !pvBits) { void *pvValue; rc = pMod->pOps->pfnGetSymbol(pMod, pszSymbol, &pvValue); if (RT_SUCCESS(rc)) *pValue = (uintptr_t)pvValue; } else AssertMsgFailedReturn(("BaseAddress=%RTptr pvBits=%p\n", BaseAddress, pvBits), VERR_INVALID_FUNCTION); LogFlow(("RTLdrGetSymbolEx: returns %Rrc *pValue=%p\n", rc, *pValue)); return rc; } /** * Enumerates all symbols in a module. * * @returns iprt status code. * @param hLdrMod The loader module handle. * @param fFlags Flags indicating what to return and such. * @param pvBits Optional pointer to the loaded image. * Set this to NULL if no RTLdrGetBits() processed image bits are available. * @param BaseAddress Image load address. * @param pfnCallback Callback function. * @param pvUser User argument for the callback. * @remark Not supported for RTLdrLoad() images. */ RTDECL(int) RTLdrEnumSymbols(RTLDRMOD hLdrMod, unsigned fFlags, const void *pvBits, RTUINTPTR BaseAddress, PFNRTLDRENUMSYMS pfnCallback, void *pvUser) { LogFlow(("RTLdrEnumSymbols: hLdrMod=%RTldrm fFlags=%#x pvBit=%p BaseAddress=%RTptr pfnCallback=%p pvUser=%p\n", hLdrMod, fFlags, pvBits, BaseAddress, pfnCallback, pvUser)); /* * Validate input. */ AssertMsgReturn(rtldrIsValid(hLdrMod), ("hLdrMod=%p\n", hLdrMod), VERR_INVALID_HANDLE); AssertMsgReturn(!pvBits || VALID_PTR(pvBits), ("pvBits=%p\n", pvBits), VERR_INVALID_PARAMETER); AssertMsgReturn(VALID_PTR(pfnCallback), ("pfnCallback=%p\n", pfnCallback), VERR_INVALID_PARAMETER); PRTLDRMODINTERNAL pMod = (PRTLDRMODINTERNAL)hLdrMod; //AssertMsgReturn(pMod->eState == LDR_STATE_OPENED, ("eState=%d\n", pMod->eState), VERR_WRONG_ORDER); /* * Do it. */ int rc = pMod->pOps->pfnEnumSymbols(pMod, fFlags, pvBits, BaseAddress, pfnCallback, pvUser); LogFlow(("RTLdrEnumSymbols: returns %Rrc\n", rc)); return rc; }