/* $Id: dbgmodldr.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */ /** @file * IPRT - Debug Module Image Interpretation by RTLdr. */ /* * Copyright (C) 2011-2022 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 #include "internal/iprt.h" #include #include #include #include #include #include #include #include #include "internal/dbgmod.h" #include "internal/ldr.h" #include "internal/magics.h" /********************************************************************************************************************************* * Structures and Typedefs * *********************************************************************************************************************************/ /** * The instance data of the RTLdr based image reader. */ typedef struct RTDBGMODLDR { /** Magic value (RTDBGMODLDR_MAGIC). */ uint32_t u32Magic; /** The loader handle. */ RTLDRMOD hLdrMod; } RTDBGMODLDR; /** Pointer to instance data NM map reader. */ typedef RTDBGMODLDR *PRTDBGMODLDR; /** @interface_method_impl{RTDBGMODVTDBG,pfnUnwindFrame} */ static DECLCALLBACK(int) rtDbgModLdr_UnwindFrame(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, RTUINTPTR off, PRTDBGUNWINDSTATE pState) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv; Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC); return RTLdrUnwindFrame(pThis->hLdrMod, NULL, iSeg, off, pState); } /** @interface_method_impl{RTDBGMODVTIMG,pfnQueryProp} */ static DECLCALLBACK(int) rtDbgModLdr_QueryProp(PRTDBGMODINT pMod, RTLDRPROP enmProp, void *pvBuf, size_t cbBuf, size_t *pcbRet) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv; Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC); return RTLdrQueryPropEx(pThis->hLdrMod, enmProp, NULL /*pvBits*/, pvBuf, cbBuf, pcbRet); } /** @interface_method_impl{RTDBGMODVTIMG,pfnGetArch} */ static DECLCALLBACK(RTLDRARCH) rtDbgModLdr_GetArch(PRTDBGMODINT pMod) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv; Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC); return RTLdrGetArch(pThis->hLdrMod); } /** @interface_method_impl{RTDBGMODVTIMG,pfnGetFormat} */ static DECLCALLBACK(RTLDRFMT) rtDbgModLdr_GetFormat(PRTDBGMODINT pMod) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv; Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC); return RTLdrGetFormat(pThis->hLdrMod); } /** @interface_method_impl{RTDBGMODVTIMG,pfnReadAt} */ static DECLCALLBACK(int) rtDbgModLdr_ReadAt(PRTDBGMODINT pMod, uint32_t iDbgInfoHint, RTFOFF off, void *pvBuf, size_t cb) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv; Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC); RT_NOREF_PV(iDbgInfoHint); return rtLdrReadAt(pThis->hLdrMod, pvBuf, UINT32_MAX /** @todo iDbgInfo*/, off, cb); } /** @interface_method_impl{RTDBGMODVTIMG,pfnUnmapPart} */ static DECLCALLBACK(int) rtDbgModLdr_UnmapPart(PRTDBGMODINT pMod, size_t cb, void const **ppvMap) { Assert(((PRTDBGMODLDR)pMod->pvImgPriv)->u32Magic == RTDBGMODLDR_MAGIC); NOREF(pMod); NOREF(cb); RTMemFree((void *)*ppvMap); *ppvMap = NULL; return VINF_SUCCESS; } /** @interface_method_impl{RTDBGMODVTIMG,pfnMapPart} */ static DECLCALLBACK(int) rtDbgModLdr_MapPart(PRTDBGMODINT pMod, uint32_t iDbgInfo, RTFOFF off, size_t cb, void const **ppvMap) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv; Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC); void *pvMap = RTMemAlloc(cb); if (!pvMap) return VERR_NO_MEMORY; int rc = rtLdrReadAt(pThis->hLdrMod, pvMap, iDbgInfo, off, cb); if (RT_SUCCESS(rc)) *ppvMap = pvMap; else { RTMemFree(pvMap); *ppvMap = NULL; } return rc; } /** @interface_method_impl{RTDBGMODVTIMG,pfnImageSize} */ static DECLCALLBACK(RTUINTPTR) rtDbgModLdr_ImageSize(PRTDBGMODINT pMod) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv; Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC); return RTLdrSize(pThis->hLdrMod); } /** @interface_method_impl{RTDBGMODVTIMG,pfnRvaToSegOffset} */ static DECLCALLBACK(int) rtDbgModLdr_RvaToSegOffset(PRTDBGMODINT pMod, RTLDRADDR Rva, PRTDBGSEGIDX piSeg, PRTLDRADDR poffSeg) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv; Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC); return RTLdrRvaToSegOffset(pThis->hLdrMod, Rva, piSeg, poffSeg); } /** @interface_method_impl{RTDBGMODVTIMG,pfnLinkAddressToSegOffset} */ static DECLCALLBACK(int) rtDbgModLdr_LinkAddressToSegOffset(PRTDBGMODINT pMod, RTLDRADDR LinkAddress, PRTDBGSEGIDX piSeg, PRTLDRADDR poffSeg) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv; Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC); return RTLdrLinkAddressToSegOffset(pThis->hLdrMod, LinkAddress, piSeg, poffSeg); } /** @interface_method_impl{RTDBGMODVTIMG,pfnEnumSymbols} */ static DECLCALLBACK(int) rtDbgModLdr_EnumSymbols(PRTDBGMODINT pMod, uint32_t fFlags, RTLDRADDR BaseAddress, PFNRTLDRENUMSYMS pfnCallback, void *pvUser) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv; Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC); return RTLdrEnumSymbols(pThis->hLdrMod, fFlags, NULL /*pvBits*/, BaseAddress, pfnCallback, pvUser); } /** @interface_method_impl{RTDBGMODVTIMG,pfnEnumSegments} */ static DECLCALLBACK(int) rtDbgModLdr_EnumSegments(PRTDBGMODINT pMod, PFNRTLDRENUMSEGS pfnCallback, void *pvUser) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv; Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC); return RTLdrEnumSegments(pThis->hLdrMod, pfnCallback, pvUser); } /** @interface_method_impl{RTDBGMODVTIMG,pfnEnumDbgInfo} */ static DECLCALLBACK(int) rtDbgModLdr_EnumDbgInfo(PRTDBGMODINT pMod, PFNRTLDRENUMDBG pfnCallback, void *pvUser) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv; Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC); return RTLdrEnumDbgInfo(pThis->hLdrMod, NULL, pfnCallback, pvUser); } /** @interface_method_impl{RTDBGMODVTIMG,pfnClose} */ static DECLCALLBACK(int) rtDbgModLdr_Close(PRTDBGMODINT pMod) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv; AssertPtr(pThis); Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC); int rc = RTLdrClose(pThis->hLdrMod); AssertRC(rc); pThis->hLdrMod = NIL_RTLDRMOD; pThis->u32Magic = RTDBGMODLDR_MAGIC_DEAD; RTMemFree(pThis); return VINF_SUCCESS; } /** @interface_method_impl{RTDBGMODVTIMG,pfnTryOpen} */ static DECLCALLBACK(int) rtDbgModLdr_TryOpen(PRTDBGMODINT pMod, RTLDRARCH enmArch, uint32_t fLdrFlags) { RTLDRMOD hLdrMod; int rc = RTLdrOpen(pMod->pszImgFile, RTLDR_O_FOR_DEBUG | fLdrFlags, enmArch, &hLdrMod); if (RT_SUCCESS(rc)) { rc = rtDbgModLdrOpenFromHandle(pMod, hLdrMod); if (RT_FAILURE(rc)) RTLdrClose(hLdrMod); } return rc; } /** Virtual function table for the RTLdr based image reader. */ DECL_HIDDEN_CONST(RTDBGMODVTIMG) const g_rtDbgModVtImgLdr = { /*.u32Magic = */ RTDBGMODVTIMG_MAGIC, /*.fReserved = */ 0, /*.pszName = */ "RTLdr", /*.pfnTryOpen = */ rtDbgModLdr_TryOpen, /*.pfnClose = */ rtDbgModLdr_Close, /*.pfnEnumDbgInfo = */ rtDbgModLdr_EnumDbgInfo, /*.pfnEnumSegments = */ rtDbgModLdr_EnumSegments, /*.pfnEnumSymbols = */ rtDbgModLdr_EnumSymbols, /*.pfnImageSize = */ rtDbgModLdr_ImageSize, /*.pfnLinkAddressToSegOffset = */ rtDbgModLdr_LinkAddressToSegOffset, /*.pfnRvaToSegOffset= */ rtDbgModLdr_RvaToSegOffset, /*.pfnMapPart = */ rtDbgModLdr_MapPart, /*.pfnUnmapPart = */ rtDbgModLdr_UnmapPart, /*.pfnReadAt = */ rtDbgModLdr_ReadAt, /*.pfnGetFormat = */ rtDbgModLdr_GetFormat, /*.pfnGetArch = */ rtDbgModLdr_GetArch, /*.pfnQueryProp = */ rtDbgModLdr_QueryProp, /*.pfnUnwindFrame = */ rtDbgModLdr_UnwindFrame, /*.u32EndMagic = */ RTDBGMODVTIMG_MAGIC }; /** * Open PE-image trick. * * @returns IPRT status code * @param pDbgMod The debug module instance. * @param hLdrMod The module to open a image debug backend for. */ DECLHIDDEN(int) rtDbgModLdrOpenFromHandle(PRTDBGMODINT pDbgMod, RTLDRMOD hLdrMod) { PRTDBGMODLDR pThis = (PRTDBGMODLDR)RTMemAllocZ(sizeof(RTDBGMODLDR)); if (!pThis) return VERR_NO_MEMORY; pThis->u32Magic = RTDBGMODLDR_MAGIC; pThis->hLdrMod = hLdrMod; pDbgMod->pvImgPriv = pThis; return VINF_SUCCESS; }