/* $Id: DBGFModule.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */ /** @file * DBGF - Debugger Facility, Module & Segment Management. */ /* * Copyright (C) 2008-2019 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. */ /** @page pg_dbgf_module DBGFModule - Module & Segment Management * * A module is our representation of an executable binary. It's main purpose * is to provide segments that can be mapped into address spaces and thereby * provide debug info for those parts for the guest code or data. * * This module will not deal directly with debug info, it will only serve * as an interface between the debugger / symbol lookup and the debug info * readers. * * An executable binary doesn't need to have a file, or that is, we don't * need the file to create a module for it. There will be interfaces for * ROMs to register themselves so we can get to their symbols, and there * will be interfaces for the guest OS plugins (@see pg_dbgf_os) to * register kernel, drivers and other global modules. */ #if 0 #include /** Special segment number that indicates that the offset is a relative * virtual address (RVA). I.e. an offset from the start of the module. */ #define DBGF_SEG_RVA UINT32_C(0xfffffff0) /** @defgroup grp_dbgf_dbginfo Debug Info Types * @{ */ /** Other format. */ #define DBGF_DBGINFO_OTHER RT_BIT_32(0) /** Stabs. */ #define DBGF_DBGINFO_STABS RT_BIT_32(1) /** Debug With Arbitrary Record Format (DWARF). */ #define DBGF_DBGINFO_DWARF RT_BIT_32(2) /** Microsoft Codeview debug info. */ #define DBGF_DBGINFO_CODEVIEW RT_BIT_32(3) /** Watcom debug info. */ #define DBGF_DBGINFO_WATCOM RT_BIT_32(4) /** IBM High Level Language debug info. */ #define DBGF_DBGINFO_HLL RT_BIT_32(5) /** Old OS/2 and Windows symbol file. */ #define DBGF_DBGINFO_SYM RT_BIT_32(6) /** Map file. */ #define DBGF_DBGINFO_MAP RT_BIT_32(7) /** @} */ /** @defgroup grp_dbgf_exeimg Executable Image Types * @{ */ /** Some other format. */ #define DBGF_EXEIMG_OTHER RT_BIT_32(0) /** Portable Executable. */ #define DBGF_EXEIMG_PE RT_BIT_32(1) /** Linear eXecutable. */ #define DBGF_EXEIMG_LX RT_BIT_32(2) /** Linear Executable. */ #define DBGF_EXEIMG_LE RT_BIT_32(3) /** New Executable. */ #define DBGF_EXEIMG_NE RT_BIT_32(4) /** DOS Executable (Mark Zbikowski). */ #define DBGF_EXEIMG_MZ RT_BIT_32(5) /** COM Executable. */ #define DBGF_EXEIMG_COM RT_BIT_32(6) /** a.out Executable. */ #define DBGF_EXEIMG_AOUT RT_BIT_32(7) /** Executable and Linkable Format. */ #define DBGF_EXEIMG_ELF RT_BIT_32(8) /** Mach-O Executable (including FAT ones). */ #define DBGF_EXEIMG_MACHO RT_BIT_32(9) /** @} */ /** Pointer to a module. */ typedef struct DBGFMOD *PDBGFMOD; /** * Virtual method table for executable image interpreters. */ typedef struct DBGFMODVTIMG { /** Magic number (DBGFMODVTIMG_MAGIC). */ uint32_t u32Magic; /** Mask of supported debug info types, see grp_dbgf_exeimg. * Used to speed up the search for a suitable interpreter. */ uint32_t fSupports; /** The name of the interpreter. */ const char *pszName; /** * Try open the image. * * This combines probing and opening. * * @returns VBox status code. No informational returns defined. * * @param pMod Pointer to the module that is being opened. * * The DBGFMOD::pszDbgFile member will point to * the filename of any debug info we're aware of * on input. Also, or alternatively, it is expected * that the interpreter will look for debug info in * the executable image file when present and that it * may ask the image interpreter for this when it's * around. * * Upon successful return the method is expected to * initialize pDbgOps and pvDbgPriv. */ DECLCALLBACKMEMBER(int, pfnTryOpen)(PDBGFMOD pMod); /** * Close the interpreter, freeing all associated resources. * * The caller sets the pDbgOps and pvDbgPriv DBGFMOD members * to NULL upon return. * * @param pMod Pointer to the module structure. */ DECLCALLBACKMEMBER(int, pfnClose)(PDBGFMOD pMod); } DBGFMODVTIMG /** * Virtual method table for debug info interpreters. */ typedef struct DBGFMODVTDBG { /** Magic number (DBGFMODVTDBG_MAGIC). */ uint32_t u32Magic; /** Mask of supported debug info types, see grp_dbgf_dbginfo. * Used to speed up the search for a suitable interpreter. */ uint32_t fSupports; /** The name of the interpreter. */ const char *pszName; /** * Try open the image. * * This combines probing and opening. * * @returns VBox status code. No informational returns defined. * * @param pMod Pointer to the module that is being opened. * * The DBGFMOD::pszDbgFile member will point to * the filename of any debug info we're aware of * on input. Also, or alternatively, it is expected * that the interpreter will look for debug info in * the executable image file when present and that it * may ask the image interpreter for this when it's * around. * * Upon successful return the method is expected to * initialize pDbgOps and pvDbgPriv. */ DECLCALLBACKMEMBER(int, pfnTryOpen)(PDBGFMOD pMod); /** * Close the interpreter, freeing all associated resources. * * The caller sets the pDbgOps and pvDbgPriv DBGFMOD members * to NULL upon return. * * @param pMod Pointer to the module structure. */ DECLCALLBACKMEMBER(int, pfnClose)(PDBGFMOD pMod); /** * Queries symbol information by symbol name. * * @returns VBox status code. * @retval VINF_SUCCESS on success, no informational status code. * @retval VERR_DBGF_NO_SYMBOLS if there aren't any symbols. * @retval VERR_SYMBOL_NOT_FOUND if no suitable symbol was found. * * @param pMod Pointer to the module structure. * @param pszSymbol The symbol name. * @para pSymbol Where to store the symbol information. */ DECLCALLBACKMEMBER(int, pfnSymbolByName)(PDBGFMOD pMod, const char *pszSymbol, PDBGFSYMBOL pSymbol); /** * Queries symbol information by address. * * The returned symbol is what the debug info interpreter considers the symbol * most applicable to the specified address. This usually means a symbol with an * address equal or lower than the requested. * * @returns VBox status code. * @retval VINF_SUCCESS on success, no informational status code. * @retval VERR_DBGF_NO_SYMBOLS if there aren't any symbols. * @retval VERR_SYMBOL_NOT_FOUND if no suitable symbol was found. * * @param pMod Pointer to the module structure. * @param iSeg The segment number (0-based). DBGF_SEG_RVA can be used. * @param off The offset into the segment. * @param poffDisp Where to store the distance between the specified address * and the returned symbol. Optional. * @param pSymbol Where to store the symbol information. */ DECLCALLBACKMEMBER(int, pfnSymbolByAddr)(PDBGFMOD pMod, uint32_t iSeg, RTGCUINTPTR off, PRTGCINTPTR poffDisp, PDBGFSYMBOL pSymbol); /** * Queries line number information by address. * * @returns VBox status code. * @retval VINF_SUCCESS on success, no informational status code. * @retval VERR_DBGF_NO_LINE_NUMBERS if there aren't any line numbers. * @retval VERR_DBGF_LINE_NOT_FOUND if no suitable line number was found. * * @param pMod Pointer to the module structure. * @param iSeg The segment number (0-based). DBGF_SEG_RVA can be used. * @param off The offset into the segment. * @param poffDisp Where to store the distance between the specified address * and the returned line number. Optional. * @param pLine Where to store the information about the closest line number. */ DECLCALLBACKMEMBER(int, pfnLineByAddr)(PDBGFMOD pMod, uint32_t iSeg, RTGCUINTPTR off, PRTGCINTPTR poffDisp, PDBGFLINE pLine); /** * Adds a symbol to the module (optional). * * This method is used to implement DBGFR3SymbolAdd. * * @returns VBox status code. * @retval VERR_NOT_SUPPORTED if the interpreter doesn't support this feature. * * @param pMod Pointer to the module structure. * @param pszSymbol The symbol name. * @param iSeg The segment number (0-based). DBGF_SEG_RVA can be used. * @param off The offset into the segment. * @param cbSymbol The area covered by the symbol. 0 is fine. */ DECLCALLBACKMEMBER(int, pfnSymbolAdd)(PDBGFMOD pMod, const char *pszSymbol, uint32_t iSeg, RTGCUINTPTR off, RTUINT cbSymbol); /** For catching initialization errors (DBGFMODVTDBG_MAGIC). */ uint32_t u32EndMagic; } DBGFMODVTDBG; #define DBGFMODVTDBG_MAGIC 123 /** * Module. */ typedef struct DBGFMOD { /** Magic value (DBGFMOD_MAGIC). */ uint32_t u32Magic; /** The number of address spaces this module is currently linked into. * This is used to perform automatic cleanup and sharing. */ uint32_t cLinks; /** The module name (short). */ const char *pszName; /** The module filename. Can be NULL. */ const char *pszImgFile; /** The debug info file (if external). Can be NULL. */ const char *pszDbgFile; /** The method table for the executable image interpreter. */ PCDBGFMODVTIMG pImgVt; /** Pointer to the private data of the executable image interpreter. */ void *pvImgPriv; /** The method table for the debug info interpreter. */ PCDBGFMODVTDBG pDbgVt; /** Pointer to the private data of the debug info interpreter. */ void *pvDbgPriv; } DBGFMOD; #define DBGFMOD_MAGIC 0x12345678 #endif