diff options
Diffstat (limited to 'src/VBox/Runtime/common/dbg/dbgmodexports.cpp')
| -rw-r--r-- | src/VBox/Runtime/common/dbg/dbgmodexports.cpp | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/dbg/dbgmodexports.cpp b/src/VBox/Runtime/common/dbg/dbgmodexports.cpp new file mode 100644 index 00000000..be22a310 --- /dev/null +++ b/src/VBox/Runtime/common/dbg/dbgmodexports.cpp @@ -0,0 +1,173 @@ +/* $Id: dbgmodexports.cpp $ */ +/** @file + * IPRT - Debug Module Using Image Exports. + */ + +/* + * Copyright (C) 2013-2019 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 * +*********************************************************************************************************************************/ +#define LOG_GROUP RTLOGGROUP_DBG +#include <iprt/dbg.h> +#include "internal/iprt.h" + +#include <iprt/alloca.h> +#include <iprt/assert.h> +#include <iprt/err.h> +#include <iprt/log.h> +#include <iprt/string.h> +#include "internal/dbgmod.h" + + +/********************************************************************************************************************************* +* Structures and Typedefs * +*********************************************************************************************************************************/ +typedef struct RTDBGMODEXPORTARGS +{ + PRTDBGMODINT pDbgMod; + RTLDRADDR uImageBase; + RTLDRADDR uRvaNext; + uint32_t cSegs; +} RTDBGMODEXPORTARGS; +/** Pointer to an argument package. */ +typedef RTDBGMODEXPORTARGS *PRTDBGMODEXPORTARGS; + + +/** + * @callback_method_impl{FNRTLDRENUMSYMS, + * Copies the symbols over into the container} */ +static DECLCALLBACK(int) rtDbgModExportsAddSymbolCallback(RTLDRMOD hLdrMod, const char *pszSymbol, unsigned uSymbol, + RTLDRADDR Value, void *pvUser) +{ + PRTDBGMODEXPORTARGS pArgs = (PRTDBGMODEXPORTARGS)pvUser; + NOREF(hLdrMod); + + if (Value >= pArgs->uImageBase) + { + char szOrdinalNm[48]; + if (!pszSymbol || *pszSymbol == '\0') + { + RTStrPrintf(szOrdinalNm, sizeof(szOrdinalNm), "Ordinal%u", uSymbol); + pszSymbol = szOrdinalNm; + } + + int rc = RTDbgModSymbolAdd(pArgs->pDbgMod, pszSymbol, RTDBGSEGIDX_RVA, Value - pArgs->uImageBase, + 0 /*cb*/, 0 /* fFlags */, NULL /*piOrdinal*/); + Log(("Symbol #%05u %#018RTptr %s [%Rrc]\n", uSymbol, Value, pszSymbol, rc)); NOREF(rc); + } + else + Log(("Symbol #%05u %#018RTptr %s [SKIPPED - INVALID ADDRESS]\n", uSymbol, Value, pszSymbol)); + return VINF_SUCCESS; +} + + +/** @callback_method_impl{FNRTLDRENUMSEGS, + * Copies the segments over into the container} */ +static DECLCALLBACK(int) rtDbgModExportsAddSegmentsCallback(RTLDRMOD hLdrMod, PCRTLDRSEG pSeg, void *pvUser) +{ + PRTDBGMODEXPORTARGS pArgs = (PRTDBGMODEXPORTARGS)pvUser; + Log(("Segment %.*s: LinkAddress=%#llx RVA=%#llx cb=%#llx\n", + pSeg->cchName, pSeg->pszName, (uint64_t)pSeg->LinkAddress, (uint64_t)pSeg->RVA, pSeg->cb)); + NOREF(hLdrMod); + + pArgs->cSegs++; + + /* Add dummy segments for segments that doesn't get mapped. */ + if ( pSeg->LinkAddress == NIL_RTLDRADDR + || pSeg->RVA == NIL_RTLDRADDR) + return RTDbgModSegmentAdd(pArgs->pDbgMod, 0, 0, pSeg->pszName, 0 /*fFlags*/, NULL); + + RTLDRADDR uRva = pSeg->RVA; +#if 0 /* Kluge for the .data..percpu segment in 64-bit linux kernels and similar. (Moved to ELF.) */ + if (uRva < pArgs->uRvaNext) + uRva = RT_ALIGN_T(pArgs->uRvaNext, pSeg->Alignment, RTLDRADDR); +#endif + + /* Find the best base address for the module. */ + if ( ( !pArgs->uImageBase + || pArgs->uImageBase > pSeg->LinkAddress) + && ( pSeg->LinkAddress != 0 /* .data..percpu again. */ + || pArgs->cSegs == 1)) + pArgs->uImageBase = pSeg->LinkAddress; + + /* Add it. */ + RTLDRADDR cb = RT_MAX(pSeg->cb, pSeg->cbMapped); + pArgs->uRvaNext = uRva + cb; + return RTDbgModSegmentAdd(pArgs->pDbgMod, uRva, cb, pSeg->pszName, 0 /*fFlags*/, NULL); +} + + +/** + * Creates the debug info side of affairs based on exports and segments found in + * the image part. + * + * The image part must be successfully initialized prior to the call, while the + * debug bits must not be present of course. + * + * @returns IPRT status code + * @param pDbgMod The debug module structure. + */ +DECLHIDDEN(int) rtDbgModCreateForExports(PRTDBGMODINT pDbgMod) +{ + AssertReturn(!pDbgMod->pDbgVt, VERR_DBG_MOD_IPE); + AssertReturn(pDbgMod->pImgVt, VERR_DBG_MOD_IPE); + RTUINTPTR cbImage = pDbgMod->pImgVt->pfnImageSize(pDbgMod); + AssertReturn(cbImage > 0, VERR_DBG_MOD_IPE); + + /* + * We simply use a container type for this work. + */ + int rc = rtDbgModContainerCreate(pDbgMod, 0); + if (RT_FAILURE(rc)) + return rc; + pDbgMod->fExports = true; + + /* + * Copy the segments and symbols. + */ + RTDBGMODEXPORTARGS Args; + Args.pDbgMod = pDbgMod; + Args.uImageBase = 0; + Args.uRvaNext = 0; + Args.cSegs = 0; + rc = pDbgMod->pImgVt->pfnEnumSegments(pDbgMod, rtDbgModExportsAddSegmentsCallback, &Args); + if (RT_SUCCESS(rc)) + { + rc = pDbgMod->pImgVt->pfnEnumSymbols(pDbgMod, RTLDR_ENUM_SYMBOL_FLAGS_ALL | RTLDR_ENUM_SYMBOL_FLAGS_NO_FWD, + Args.uImageBase ? Args.uImageBase : 0x10000, + rtDbgModExportsAddSymbolCallback, &Args); + if (RT_FAILURE(rc)) + Log(("rtDbgModCreateForExports: Error during symbol enum: %Rrc\n", rc)); + } + else + Log(("rtDbgModCreateForExports: Error during segment enum: %Rrc\n", rc)); + + /* This won't fail. */ + if (RT_SUCCESS(rc)) + rc = VINF_SUCCESS; + else + rc = -rc; /* Change it into a warning. */ + return rc; +} + |