Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 723 insertions, 0 deletions

diff --git a/src/VBox/Runtime/include/internal/dbgmod.h b/src/VBox/Runtime/include/internal/dbgmod.h
new file mode 100644
index 00000000..de3bab8f
--- /dev/null
+++ b/src/VBox/Runtime/include/internal/dbgmod.h
@@ -0,0 +1,723 @@
+/* $Id: dbgmod.h $ */
+/** @file
+ * IPRT - Internal Header for RTDbgMod and the associated interpreters.
+ */
+
+/*
+ * 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.
+ *
+ * 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.
+ */
+
+#ifndef IPRT_INCLUDED_INTERNAL_dbgmod_h
+#define IPRT_INCLUDED_INTERNAL_dbgmod_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/types.h>
+#include <iprt/critsect.h>
+#include <iprt/ldr.h> /* for PFNRTLDRENUMDBG */
+#include "internal/magics.h"
+
+RT_C_DECLS_BEGIN
+
+/** @addtogroup grp_rt_dbgmod
+ * @internal
+ * @{
+ */
+
+
+/** Pointer to the internal module structure. */
+typedef struct RTDBGMODINT *PRTDBGMODINT;
+
+/**
+ * Virtual method table for executable image interpreters.
+ */
+typedef struct RTDBGMODVTIMG
+{
+    /** Magic number (RTDBGMODVTIMG_MAGIC). */
+    uint32_t    u32Magic;
+    /** Reserved. */
+    uint32_t    fReserved;
+    /** The name of the interpreter. */
+    const char *pszName;
+
+    /**
+     * Try open the image.
+     *
+     * This combines probing and opening.
+     *
+     * @returns IPRT status code. No informational returns defined.
+     *
+     * @param   pMod        Pointer to the module that is being opened.
+     *
+     *                      The RTDBGMOD::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 pImgOps and pvImgPriv.
+     * @param   enmArch     The desired architecture.
+     */
+    DECLCALLBACKMEMBER(int, pfnTryOpen)(PRTDBGMODINT pMod, RTLDRARCH enmArch);
+
+    /**
+     * Close the interpreter, freeing all associated resources.
+     *
+     * The caller sets the pDbgOps and pvDbgPriv RTDBGMOD members
+     * to NULL upon return.
+     *
+     * @param   pMod        Pointer to the module structure.
+     */
+    DECLCALLBACKMEMBER(int, pfnClose)(PRTDBGMODINT pMod);
+
+    /**
+     * Enumerate the debug info contained in the executable image.
+     *
+     * Identical to RTLdrEnumDbgInfo.
+     *
+     * @returns IPRT status code or whatever pfnCallback returns.
+     *
+     * @param   pMod            Pointer to the module structure.
+     * @param   pfnCallback     The callback function.  Ignore the module
+     *                          handle argument!
+     * @param   pvUser          The user argument.
+     */
+    DECLCALLBACKMEMBER(int, pfnEnumDbgInfo)(PRTDBGMODINT pMod, PFNRTLDRENUMDBG pfnCallback, void *pvUser);
+
+    /**
+     * Enumerate the segments in the executable image.
+     *
+     * Identical to RTLdrEnumSegments.
+     *
+     * @returns IPRT status code or whatever pfnCallback returns.
+     *
+     * @param   pMod            Pointer to the module structure.
+     * @param   pfnCallback     The callback function.  Ignore the module
+     *                          handle argument!
+     * @param   pvUser          The user argument.
+     */
+    DECLCALLBACKMEMBER(int, pfnEnumSegments)(PRTDBGMODINT pMod, PFNRTLDRENUMSEGS pfnCallback, void *pvUser);
+
+    /**
+     * Enumerates the symbols exported by the module.
+     *
+     * @returns iprt status code, which might have been returned by pfnCallback.
+     * @param   pMod            Pointer to the module structure.
+     * @param   fFlags          Flags indicating what to return and such.
+     * @param   BaseAddress     The image base addressto use when calculating the
+     *                          symbol values.
+     * @param   pfnCallback     The callback function which each symbol is to be fed
+     *                          to.
+     * @param   pvUser          User argument to pass to the enumerator.
+     */
+    DECLCALLBACKMEMBER(int, pfnEnumSymbols)(PRTDBGMODINT pMod, uint32_t fFlags, RTLDRADDR BaseAddress,
+                                            PFNRTLDRENUMSYMS pfnCallback, void *pvUser);
+
+    /**
+     * Gets the size of the loaded image.
+     *
+     * Identical to RTLdrSize.
+     *
+     * @returns The size in bytes, RTUINTPTR_MAX on failure.
+     *
+     * @param   pMod            Pointer to the module structure.
+     */
+    DECLCALLBACKMEMBER(RTUINTPTR, pfnImageSize)(PRTDBGMODINT pMod);
+
+    /**
+     * Converts a link address to a segment:offset address (RVA included).
+     *
+     * @returns IPRT status code.
+     *
+     * @param   pMod            Pointer to the module structure.
+     * @param   LinkAddress     The link address to convert.
+     * @param   piSeg           The segment index.
+     * @param   poffSeg         Where to return the segment offset.
+     */
+    DECLCALLBACKMEMBER(int, pfnLinkAddressToSegOffset)(PRTDBGMODINT pMod, RTLDRADDR LinkAddress,
+                                                       PRTDBGSEGIDX piSeg, PRTLDRADDR poffSeg);
+
+    /**
+     * Converts an image relative virtual address to a segment:offset.
+     *
+     * @returns IPRT status code.
+     *
+     * @param   pMod            Pointer to the loader module structure.
+     * @param   Rva             The RVA to convert.
+     * @param   piSeg           The segment index.
+     * @param   poffSeg         Where to return the segment offset.
+     */
+    DECLCALLBACKMEMBER(int, pfnRvaToSegOffset)(PRTDBGMODINT pMod, RTLDRADDR Rva, uint32_t *piSeg, PRTLDRADDR poffSeg);
+
+    /**
+     * Creates a read-only mapping of a part of the image file.
+     *
+     * @returns IPRT status code and *ppvMap set on success.
+     *
+     * @param   pMod            Pointer to the module structure.
+     * @param   iDbgInfo        The debug info ordinal number if the request
+     *                          corresponds exactly to a debug info part from
+     *                          pfnEnumDbgInfo.  Otherwise, pass UINT32_MAX.
+     * @param   off             The offset into the image file.
+     * @param   cb              The number of bytes to map.
+     * @param   ppvMap          Where to return the mapping address on success.
+     *
+     * @remarks Fixups will only be applied if @a iDbgInfo is specified.
+     */
+    DECLCALLBACKMEMBER(int, pfnMapPart)(PRTDBGMODINT pMod, uint32_t iDbgInfo, RTFOFF off, size_t cb, void const **ppvMap);
+
+    /**
+     * Unmaps memory previously mapped by pfnMapPart.
+     *
+     * @returns IPRT status code, *ppvMap set to NULL on success.
+     *
+     * @param   pMod            Pointer to the module structure.
+     * @param   cb              The size of the mapping.
+     * @param   ppvMap          The mapping address on input, NULL on
+     *                          successful return.
+     */
+    DECLCALLBACKMEMBER(int, pfnUnmapPart)(PRTDBGMODINT pMod, size_t cb, void const **ppvMap);
+
+    /**
+     * Reads data from the image file.
+     *
+     * @returns IPRT status code, *ppvMap set to NULL on success.
+     *
+     * @param   pMod            Pointer to the module structure.
+     * @param   iDbgInfoHint    The debug info ordinal number hint, pass UINT32_MAX
+     *                          if not know or sure.
+     * @param   off             The offset into the image file.
+     * @param   pvBuf           The buffer to read into.
+     * @param   cb              The number of bytes to read.
+     */
+    DECLCALLBACKMEMBER(int, pfnReadAt)(PRTDBGMODINT pMod, uint32_t iDbgInfoHint, RTFOFF off, void *pvBuf, size_t cb);
+
+    /**
+     * Gets the image format.
+     *
+     * @returns Valid image format on success, RTLDRFMT_INVALID if not supported.
+     * @param   pMod            Pointer to the module structure.
+     */
+    DECLCALLBACKMEMBER(RTLDRFMT, pfnGetFormat)(PRTDBGMODINT pMod);
+
+    /**
+     * Gets the image architecture.
+     *
+     * @returns Valid image architecutre on success, RTLDRARCH_WHATEVER if not
+     *          supported.
+     * @param   pMod            Pointer to the module structure.
+     */
+    DECLCALLBACKMEMBER(RTLDRARCH, pfnGetArch)(PRTDBGMODINT pMod);
+
+    /**
+     * Generic method for querying image properties.
+     *
+     * @returns IPRT status code.
+     * @param   pMod            Pointer to the module structure.
+     * @param   enmProp         The property to query.
+     * @param   pvBuf           Pointer to the return buffer.
+     * @param   cbBuf           The size of the return buffer.
+     * @param   pcbRet          How many bytes was actually returned.  In the
+     *                          case of VERR_BUFFER_OVERFLOW this will contain
+     *                          the required buffer size.  Optional.
+     * @sa      RTLdrQueryPropEx
+     */
+    DECLCALLBACKMEMBER(int, pfnQueryProp)(PRTDBGMODINT pMod, RTLDRPROP enmProp, void *pvBuf, size_t cbBuf, size_t *pcbRet);
+
+    /**
+     * Try use unwind information to unwind one frame.
+     *
+     * @returns IPRT status code.  Last informational status from stack reader callback.
+     * @retval  VERR_DBG_NO_UNWIND_INFO if the module contains no unwind information.
+     * @retval  VERR_DBG_UNWIND_INFO_NOT_FOUND if no unwind information was found
+     *          for the location given by iSeg:off.
+     *
+     * @param   pMod        Pointer to the module structure.
+     * @param   iSeg        The segment number of the program counter.
+     * @param   off         The offset into @a iSeg.  Together with @a iSeg
+     *                      this corresponds to the RTDBGUNWINDSTATE::uPc
+     *                      value pointed to by @a pState.
+     * @param   pState      The unwind state to work.
+     *
+     * @sa      RTLdrUnwindFrame, RTDbgModUnwindFrame
+     */
+    DECLCALLBACKMEMBER(int, pfnUnwindFrame)(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, RTUINTPTR off, PRTDBGUNWINDSTATE pState);
+
+    /** For catching initialization errors (RTDBGMODVTIMG_MAGIC). */
+    uint32_t    u32EndMagic;
+} RTDBGMODVTIMG;
+/** Pointer to a const RTDBGMODVTIMG. */
+typedef RTDBGMODVTIMG const *PCRTDBGMODVTIMG;
+
+
+/**
+ * Virtual method table for debug info interpreters.
+ */
+typedef struct RTDBGMODVTDBG
+{
+    /** Magic number (RTDBGMODVTDBG_MAGIC). */
+    uint32_t    u32Magic;
+    /** Mask of supported debug info types, see grp_rt_dbg_type.
+     * 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 IPRT status code. No informational returns defined.
+     *
+     * @param   pMod        Pointer to the module that is being opened.
+     *
+     *                      The RTDBGMOD::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.
+     * @param   enmArch     The desired architecture.
+     */
+    DECLCALLBACKMEMBER(int, pfnTryOpen)(PRTDBGMODINT pMod, RTLDRARCH enmArch);
+
+    /**
+     * Close the interpreter, freeing all associated resources.
+     *
+     * The caller sets the pDbgOps and pvDbgPriv RTDBGMOD members
+     * to NULL upon return.
+     *
+     * @param   pMod        Pointer to the module structure.
+     */
+    DECLCALLBACKMEMBER(int, pfnClose)(PRTDBGMODINT pMod);
+
+
+
+    /**
+     * Converts an image relative virtual address address to a segmented address.
+     *
+     * @returns Segment index on success, NIL_RTDBGSEGIDX on failure.
+     * @param   pMod        Pointer to the module structure.
+     * @param   uRva        The image relative address to convert.
+     * @param   poffSeg     Where to return the segment offset. Optional.
+     */
+    DECLCALLBACKMEMBER(RTDBGSEGIDX, pfnRvaToSegOff)(PRTDBGMODINT pMod, RTUINTPTR uRva, PRTUINTPTR poffSeg);
+
+    /**
+     * Image size when mapped if segments are mapped adjacently.
+     *
+     * For ELF, PE, and Mach-O images this is (usually) a natural query, for LX and
+     * NE and such it's a bit odder and the answer may not make much sense for them.
+     *
+     * @returns Image mapped size.
+     * @param   pMod        Pointer to the module structure.
+     */
+    DECLCALLBACKMEMBER(RTUINTPTR, pfnImageSize)(PRTDBGMODINT pMod);
+
+
+
+    /**
+     * Adds a segment to the module (optional).
+     *
+     * @returns IPRT status code.
+     * @retval  VERR_NOT_SUPPORTED if the interpreter doesn't support this feature.
+     * @retval  VERR_DBG_SEGMENT_INDEX_CONFLICT if the segment index exists already.
+     *
+     * @param   pMod        Pointer to the module structure.
+     * @param   uRva        The segment image relative address.
+     * @param   cb          The segment size.
+     * @param   pszName     The segment name.
+     * @param   cchName     The length of the segment name.
+     * @param   fFlags      Segment flags.
+     * @param   piSeg       The segment index or NIL_RTDBGSEGIDX on input.
+     *                      The assigned segment index on successful return.
+     *                      Optional.
+     */
+    DECLCALLBACKMEMBER(int, pfnSegmentAdd)(PRTDBGMODINT pMod, RTUINTPTR uRva, RTUINTPTR cb, const char *pszName, size_t cchName,
+                                           uint32_t fFlags, PRTDBGSEGIDX piSeg);
+
+    /**
+     * Gets the segment count.
+     *
+     * @returns Number of segments.
+     * @retval  NIL_RTDBGSEGIDX if unknown.
+     *
+     * @param   pMod        Pointer to the module structure.
+     */
+    DECLCALLBACKMEMBER(RTDBGSEGIDX, pfnSegmentCount)(PRTDBGMODINT pMod);
+
+    /**
+     * Gets information about a segment.
+     *
+     * @returns IPRT status code.
+     * @retval  VERR_DBG_INVALID_SEGMENT_INDEX if iSeg is too high.
+     *
+     * @param   pMod        Pointer to the module structure.
+     * @param   iSeg        The segment.
+     * @param   pSegInfo    Where to store the segment information.
+     */
+    DECLCALLBACKMEMBER(int, pfnSegmentByIndex)(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, PRTDBGSEGMENT pSegInfo);
+
+
+
+    /**
+     * Adds a symbol to the module (optional).
+     *
+     * @returns IPRT  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   cchSymbol   The length for the symbol name.
+     * @param   iSeg        The segment number (0-based). RTDBGMOD_SEG_RVA can be used.
+     * @param   off         The offset into the segment.
+     * @param   cb          The area covered by the symbol. 0 is fine.
+     * @param   fFlags      Flags.
+     * @param   piOrdinal   Where to return the symbol ordinal on success. If the
+     *                      interpreter doesn't do ordinals, this will be set to
+     *                      UINT32_MAX. Optional
+     */
+    DECLCALLBACKMEMBER(int, pfnSymbolAdd)(PRTDBGMODINT pMod, const char *pszSymbol, size_t cchSymbol,
+                                          uint32_t iSeg, RTUINTPTR off, RTUINTPTR cb, uint32_t fFlags,
+                                          uint32_t *piOrdinal);
+
+    /**
+     * Gets the number of symbols in the module.
+     *
+     * This is used for figuring out the max value to pass to pfnSymbolByIndex among
+     * other things.
+     *
+     * @returns The number of symbols, UINT32_MAX if not known/supported.
+     *
+     * @param   pMod        Pointer to the module structure.
+     */
+    DECLCALLBACKMEMBER(uint32_t, pfnSymbolCount)(PRTDBGMODINT pMod);
+
+    /**
+     * Queries symbol information by ordinal number.
+     *
+     * @returns IPRT status code.
+     * @retval  VINF_SUCCESS on success, no informational status code.
+     * @retval  VERR_DBG_NO_SYMBOLS if there aren't any symbols.
+     * @retval  VERR_NOT_SUPPORTED if lookup by ordinal is not supported.
+     * @retval  VERR_SYMBOL_NOT_FOUND if there is no symbol at that index.
+     *
+     * @param   pMod        Pointer to the module structure.
+     * @param   iOrdinal    The symbol ordinal number.
+     * @param   pSymInfo    Where to store the symbol information.
+     */
+    DECLCALLBACKMEMBER(int, pfnSymbolByOrdinal)(PRTDBGMODINT pMod, uint32_t iOrdinal, PRTDBGSYMBOL pSymInfo);
+
+    /**
+     * Queries symbol information by symbol name.
+     *
+     * @returns IPRT status code.
+     * @retval  VINF_SUCCESS on success, no informational status code.
+     * @retval  VERR_DBG_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.
+     * @param   cchSymbol   The length of the symbol name.
+     * @param   pSymInfo    Where to store the symbol information.
+     */
+    DECLCALLBACKMEMBER(int, pfnSymbolByName)(PRTDBGMODINT pMod, const char *pszSymbol, size_t cchSymbol, PRTDBGSYMBOL pSymInfo);
+
+    /**
+     * 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 IPRT status code.
+     * @retval  VINF_SUCCESS on success, no informational status code.
+     * @retval  VERR_DBG_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) or RTDBGSEGIDX_ABS.
+     * @param   off         The offset into the segment.
+     * @param   fFlags      Symbol search flags, see RTDBGSYMADDR_FLAGS_XXX.
+     * @param   poffDisp    Where to store the distance between the specified address
+     *                      and the returned symbol. Optional.
+     * @param   pSymInfo    Where to store the symbol information.
+     */
+    DECLCALLBACKMEMBER(int, pfnSymbolByAddr)(PRTDBGMODINT pMod, uint32_t iSeg, RTUINTPTR off, uint32_t fFlags,
+                                             PRTINTPTR poffDisp, PRTDBGSYMBOL pSymInfo);
+
+
+
+    /**
+     * Adds a line number to the module (optional).
+     *
+     * @returns IPRT status code.
+     * @retval  VERR_NOT_SUPPORTED if the interpreter doesn't support this feature.
+     *
+     * @param   pMod        Pointer to the module structure.
+     * @param   pszFile     The filename.
+     * @param   cchFile     The length of the filename.
+     * @param   uLineNo     The line number.
+     * @param   iSeg        The segment number (0-based).
+     * @param   off         The offset into the segment.
+     * @param   piOrdinal   Where to return the line number ordinal on success. If
+     *                      the interpreter doesn't do ordinals, this will be set to
+     *                      UINT32_MAX. Optional
+     */
+    DECLCALLBACKMEMBER(int, pfnLineAdd)(PRTDBGMODINT pMod, const char *pszFile, size_t cchFile, uint32_t uLineNo,
+                                        uint32_t iSeg, RTUINTPTR off, uint32_t *piOrdinal);
+
+    /**
+     * Gets the number of line numbers in the module.
+     *
+     * @returns The number or UINT32_MAX if not known/supported.
+     *
+     * @param   pMod        Pointer to the module structure.
+     */
+    DECLCALLBACKMEMBER(uint32_t, pfnLineCount)(PRTDBGMODINT pMod);
+
+    /**
+     * Queries line number information by ordinal number.
+     *
+     * @returns IPRT status code.
+     * @retval  VINF_SUCCESS on success, no informational status code.
+     * @retval  VERR_DBG_NO_LINE_NUMBERS if there aren't any line numbers.
+     * @retval  VERR_DBG_LINE_NOT_FOUND if there is no line number with that
+     *          ordinal.
+     *
+     * @param   pMod        Pointer to the module structure.
+     * @param   iOrdinal    The line number ordinal number.
+     * @param   pLineInfo   Where to store the information about the line number.
+     */
+    DECLCALLBACKMEMBER(int, pfnLineByOrdinal)(PRTDBGMODINT pMod, uint32_t iOrdinal, PRTDBGLINE pLineInfo);
+
+    /**
+     * Queries line number information by address.
+     *
+     * @returns IPRT status code.
+     * @retval  VINF_SUCCESS on success, no informational status code.
+     * @retval  VERR_DBG_NO_LINE_NUMBERS if there aren't any line numbers.
+     * @retval  VERR_DBG_LINE_NOT_FOUND if no suitable line number was found.
+     *
+     * @param   pMod        Pointer to the module structure.
+     * @param   iSeg        The segment number (0-based) or RTDBGSEGIDX_ABS.
+     * @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   pLineInfo   Where to store the information about the closest line
+     *                      number.
+     */
+    DECLCALLBACKMEMBER(int, pfnLineByAddr)(PRTDBGMODINT pMod, uint32_t iSeg, RTUINTPTR off,
+                                           PRTINTPTR poffDisp, PRTDBGLINE pLineInfo);
+
+    /**
+     * Try use unwind information to unwind one frame.
+     *
+     * @returns IPRT status code.  Last informational status from stack reader callback.
+     * @retval  VERR_DBG_NO_UNWIND_INFO if the module contains no unwind information.
+     * @retval  VERR_DBG_UNWIND_INFO_NOT_FOUND if no unwind information was found
+     *          for the location given by iSeg:off.
+     *
+     * @param   pMod        Pointer to the module structure.
+     * @param   iSeg        The segment number of the program counter.
+     * @param   off         The offset into @a iSeg.  Together with @a iSeg
+     *                      this corresponds to the RTDBGUNWINDSTATE::uPc
+     *                      value pointed to by @a pState.
+     * @param   pState      The unwind state to work.
+     *
+     * @sa      RTDbgModUnwindFrame
+     */
+    DECLCALLBACKMEMBER(int, pfnUnwindFrame)(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, RTUINTPTR off, PRTDBGUNWINDSTATE pState);
+
+    /** For catching initialization errors (RTDBGMODVTDBG_MAGIC). */
+    uint32_t    u32EndMagic;
+} RTDBGMODVTDBG;
+/** Pointer to a const RTDBGMODVTDBG. */
+typedef RTDBGMODVTDBG const *PCRTDBGMODVTDBG;
+
+
+/**
+ * Deferred loading callback.
+ *
+ * @returns IPRT status code. On success the necessary method tables should be
+ *          installed in @a pMod.
+ * @param   pDbgMod         Pointer to the debug module structure.
+ * @param   pDeferred       The deferred load data.
+ */
+typedef DECLCALLBACK(int) FNRTDBGMODDEFERRED(PRTDBGMODINT pDbgMod, struct RTDBGMODDEFERRED *pDeferred);
+/** Pointer to a deferred loading callback. */
+typedef FNRTDBGMODDEFERRED *PFNRTDBGMODDEFERRED;
+
+
+/**
+ * Structure pointed to by pvDbgPriv and/or pvImgPriv when
+ * g_rtDbgModVtDbgDeferred and/or g_rtDbgModVtImgDeferred are being used.
+ */
+typedef struct RTDBGMODDEFERRED
+{
+    /** Magic value (RTDBGMODDEFERRED_MAGIC). */
+    uint32_t            u32Magic;
+    /** Reference counter. */
+    uint32_t volatile   cRefs;
+    /** The image size.
+     * Deferred loading is almost pointless without knowing the module size, as
+     * it cannot be mapped (correctly) without it. */
+    RTUINTPTR           cbImage;
+    /** The configuration instance (referenced), can be NIL. */
+    RTDBGCFG            hDbgCfg;
+    /** Performs deferred loading of the module. */
+    PFNRTDBGMODDEFERRED pfnDeferred;
+    /** Callback specific data.  */
+    union
+    {
+        struct
+        {
+            /** The time/date stamp of the executable image and codeview file. */
+            uint32_t    uTimestamp;
+        }   PeImage,
+            OldCodeView;
+
+        struct
+        {
+            /** The PDB uuid. */
+            RTUUID      Uuid;
+            /** The PDB age. */
+            uint32_t    uAge;
+        }   NewCodeview;
+
+        struct
+        {
+            /** The CRC-32 value found in the .gnu_debuglink section. */
+            uint32_t    uCrc32;
+        }   GnuDebugLink;
+
+        struct
+        {
+            /** The image UUID. */
+            RTUUID          Uuid;
+            /** Image architecture. */
+            RTLDRARCH       enmArch;
+            /** Number of segment mappings. */
+            uint32_t        cSegs;
+            /** Segment mappings. */
+            RTDBGSEGMENT    aSegs[1];
+        }   MachO;
+    } u;
+} RTDBGMODDEFERRED;
+/** Pointer to the deferred loading data. */
+typedef RTDBGMODDEFERRED *PRTDBGMODDEFERRED;
+
+
+/**
+ * Debug module structure.
+ */
+typedef struct RTDBGMODINT
+{
+    /** Magic value (RTDBGMOD_MAGIC). */
+    uint32_t            u32Magic;
+    /** The number of reference there are to this module.
+     * This is used to perform automatic cleanup and sharing. */
+    uint32_t volatile   cRefs;
+    /** The module tag. */
+    uint64_t            uTag;
+
+    /** When set, the loading of the image and debug info (including locating any
+     * external files), will not have taken place yet.  */
+    uint32_t            fDeferred : 1;
+    /** Set if deferred loading failed. */
+    uint32_t            fDeferredFailed : 1;
+    /** Set if the debug info is based on image exports and segments. */
+    uint32_t            fExports : 1;
+    /** Alignment padding. */
+    uint32_t            fPadding1 : 29;
+#if ARCH_BITS == 64
+    uint32_t            u32Padding2;
+#endif
+
+    /** The module name (short). */
+    char const         *pszName;
+    /** The image file specified by the user.  Can be NULL. */
+    char const         *pszImgFileSpecified;
+    /** The module filename. Can be NULL. */
+    char const         *pszImgFile;
+    /** The debug info file (if external). Can be NULL. */
+    char const         *pszDbgFile;
+
+    /** The method table for the executable image interpreter. */
+    PCRTDBGMODVTIMG     pImgVt;
+    /** Pointer to the private data of the executable image interpreter. */
+    void               *pvImgPriv;
+
+    /** The method table for the debug info interpreter. */
+    PCRTDBGMODVTDBG     pDbgVt;
+    /** Pointer to the private data of the debug info interpreter. */
+    void               *pvDbgPriv;
+
+    /** Critical section serializing access to the module. */
+    RTCRITSECT          CritSect;
+} RTDBGMODINT;
+/** Pointer to an debug module structure.  */
+typedef RTDBGMODINT *PRTDBGMODINT;
+
+
+extern DECLHIDDEN(RTSTRCACHE)           g_hDbgModStrCache;
+extern DECLHIDDEN(RTDBGMODVTDBG const)  g_rtDbgModVtDbgCodeView;
+extern DECLHIDDEN(RTDBGMODVTDBG const)  g_rtDbgModVtDbgDwarf;
+extern DECLHIDDEN(RTDBGMODVTDBG const)  g_rtDbgModVtDbgNm;
+extern DECLHIDDEN(RTDBGMODVTDBG const)  g_rtDbgModVtDbgMapSym;
+#ifdef RT_OS_WINDOWS
+extern DECLHIDDEN(RTDBGMODVTDBG const)  g_rtDbgModVtDbgDbgHelp;
+#endif
+extern DECLHIDDEN(RTDBGMODVTDBG const)  g_rtDbgModVtDbgDeferred;
+extern DECLHIDDEN(RTDBGMODVTDBG const)  g_rtDbgModVtDbgContainer;
+
+extern DECLHIDDEN(RTDBGMODVTIMG const)  g_rtDbgModVtImgLdr;
+extern DECLHIDDEN(RTDBGMODVTIMG const)  g_rtDbgModVtImgDeferred;
+
+DECLHIDDEN(int) rtDbgModContainerCreate(PRTDBGMODINT pMod, RTUINTPTR cbSeg);
+DECLHIDDEN(int) rtDbgModContainer_SymbolRemoveAll(PRTDBGMODINT pMod);
+DECLHIDDEN(int) rtDbgModContainer_LineRemoveAll(PRTDBGMODINT pMod);
+DECLHIDDEN(int) rtDbgModContainer_RemoveAll(PRTDBGMODINT pMod);
+
+DECLHIDDEN(int) rtDbgModCreateForExports(PRTDBGMODINT pDbgMod);
+DECLHIDDEN(int) rtDbgModDeferredCreate(PRTDBGMODINT pDbgMod, PFNRTDBGMODDEFERRED pfnDeferred, RTUINTPTR cbImage,
+                                       RTDBGCFG hDbgCfg, size_t cbDeferred, PRTDBGMODDEFERRED *ppDeferred);
+
+DECLHIDDEN(int) rtDbgModLdrOpenFromHandle(PRTDBGMODINT pDbgMod, RTLDRMOD hLdrMod);
+
+DECLHIDDEN(int) rtDwarfUnwind_EhData(void const *pvSection, size_t cbSection, RTUINTPTR uRvaSection,
+                                     RTDBGSEGIDX idxSeg, RTUINTPTR offSeg, RTUINTPTR uRva,
+                                     PRTDBGUNWINDSTATE pState, RTLDRARCH enmArch);
+
+/** @} */
+
+RT_C_DECLS_END
+
+#endif /* !IPRT_INCLUDED_INTERNAL_dbgmod_h */
+