Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream

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

1 files changed, 2034 insertions, 0 deletions

diff --git a/include/iprt/dbg.h b/include/iprt/dbg.h
new file mode 100644
index 00000000..64a3a94b
--- /dev/null
+++ b/include/iprt/dbg.h
@@ -0,0 +1,2034 @@
+/* $Id: dbg.h $ */
+/** @file
+ * IPRT - Debugging Routines.
+ */
+
+/*
+ * Copyright (C) 2008-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program 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 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef IPRT_INCLUDED_dbg_h
+#define IPRT_INCLUDED_dbg_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/types.h>
+#include <iprt/stdarg.h>
+#include <iprt/ldr.h>
+
+RT_C_DECLS_BEGIN
+
+
+/** @defgroup grp_rt_dbg    RTDbg - Debugging Routines
+ * @ingroup grp_rt
+ * @{
+ */
+
+
+/** Debug segment index. */
+typedef uint32_t            RTDBGSEGIDX;
+/** Pointer to a debug segment index. */
+typedef RTDBGSEGIDX        *PRTDBGSEGIDX;
+/** Pointer to a const debug segment index. */
+typedef RTDBGSEGIDX const  *PCRTDBGSEGIDX;
+/** NIL debug segment index. */
+#define NIL_RTDBGSEGIDX             UINT32_C(0xffffffff)
+/** The last normal segment index. */
+#define RTDBGSEGIDX_LAST            UINT32_C(0xffffffef)
+/** Special segment index that indicates that the offset is a relative
+ * virtual address (RVA). I.e. an offset from the start of the module. */
+#define RTDBGSEGIDX_RVA             UINT32_C(0xfffffff0)
+/** Special segment index that indicates that the offset is a absolute. */
+#define RTDBGSEGIDX_ABS             UINT32_C(0xfffffff1)
+/** The last valid special segment index. */
+#define RTDBGSEGIDX_SPECIAL_LAST    RTDBGSEGIDX_ABS
+/** The last valid special segment index. */
+#define RTDBGSEGIDX_SPECIAL_FIRST   (RTDBGSEGIDX_LAST + 1U)
+
+
+
+/** @name RTDBGSYMADDR_FLAGS_XXX
+ * Flags used when looking up a symbol by address.
+ * @{ */
+/** Less or equal address. (default) */
+#define RTDBGSYMADDR_FLAGS_LESS_OR_EQUAL        UINT32_C(0)
+/** Greater or equal address.  */
+#define RTDBGSYMADDR_FLAGS_GREATER_OR_EQUAL     UINT32_C(1)
+/** Don't consider absolute symbols in deferred modules. */
+#define RTDBGSYMADDR_FLAGS_SKIP_ABS_IN_DEFERRED UINT32_C(2)
+/** Don't search for absolute symbols if it's expensive. */
+#define RTDBGSYMADDR_FLAGS_SKIP_ABS             UINT32_C(4)
+/** Mask of valid flags. */
+#define RTDBGSYMADDR_FLAGS_VALID_MASK           UINT32_C(7)
+/** @} */
+
+/** @name RTDBGSYMBOLADD_F_XXX - Flags for RTDbgModSymbolAdd and RTDbgAsSymbolAdd.
+ * @{ */
+/** Replace existing symbol with same address. */
+#define RTDBGSYMBOLADD_F_REPLACE_SAME_ADDR         UINT32_C(0x00000001)
+/** Replace any existing symbols overlapping the symbol range. */
+#define RTDBGSYMBOLADD_F_REPLACE_ANY               UINT32_C(0x00000002)
+/** Adjust sizes on address conflict.  This applies to the symbol being added
+ * as well as existing symbols. */
+#define RTDBGSYMBOLADD_F_ADJUST_SIZES_ON_CONFLICT  UINT32_C(0x00000004)
+/** Mask of valid flags. */
+#define RTDBGSYMBOLADD_F_VALID_MASK                UINT32_C(0x00000007)
+/** @} */
+
+/** Max length (including '\\0') of a segment name. */
+#define RTDBG_SEGMENT_NAME_LENGTH   (128 - 8 - 8 - 8 - 4 - 4)
+
+/**
+ * Debug module segment.
+ */
+typedef struct RTDBGSEGMENT
+{
+    /** The load address.
+     * RTUINTPTR_MAX if not applicable. */
+    RTUINTPTR           Address;
+    /** The image relative virtual address of the segment.
+     * RTUINTPTR_MAX if not applicable. */
+    RTUINTPTR           uRva;
+    /** The segment size. */
+    RTUINTPTR           cb;
+    /** The segment flags. (reserved) */
+    uint32_t            fFlags;
+    /** The segment index. */
+    RTDBGSEGIDX         iSeg;
+    /** Symbol name. */
+    char                szName[RTDBG_SEGMENT_NAME_LENGTH];
+} RTDBGSEGMENT;
+/** Pointer to a debug module segment. */
+typedef RTDBGSEGMENT *PRTDBGSEGMENT;
+/** Pointer to a const debug module segment. */
+typedef RTDBGSEGMENT const *PCRTDBGSEGMENT;
+
+
+/**
+ * Return type.
+ */
+typedef enum RTDBGRETURNTYPE
+{
+    /** The usual invalid 0 value. */
+    RTDBGRETURNTYPE_INVALID = 0,
+    /** Near 16-bit return. */
+    RTDBGRETURNTYPE_NEAR16,
+    /** Near 32-bit return. */
+    RTDBGRETURNTYPE_NEAR32,
+    /** Near 64-bit return. */
+    RTDBGRETURNTYPE_NEAR64,
+    /** Far 16:16 return. */
+    RTDBGRETURNTYPE_FAR16,
+    /** Far 16:32 return. */
+    RTDBGRETURNTYPE_FAR32,
+    /** Far 16:64 return. */
+    RTDBGRETURNTYPE_FAR64,
+    /** 16-bit iret return (e.g. real or 286 protect mode). */
+    RTDBGRETURNTYPE_IRET16,
+    /** 32-bit iret return. */
+    RTDBGRETURNTYPE_IRET32,
+    /** 32-bit iret return. */
+    RTDBGRETURNTYPE_IRET32_PRIV,
+    /** 32-bit iret return to V86 mode. */
+    RTDBGRETURNTYPE_IRET32_V86,
+    /** @todo 64-bit iret return. */
+    RTDBGRETURNTYPE_IRET64,
+    /** The end of the valid return types. */
+    RTDBGRETURNTYPE_END,
+    /** The usual 32-bit blowup. */
+    RTDBGRETURNTYPE_32BIT_HACK = 0x7fffffff
+} RTDBGRETURNTYPE;
+
+/**
+ * Figures the size of the return state on the stack.
+ *
+ * @returns number of bytes. 0 if invalid parameter.
+ * @param   enmRetType  The type of return.
+ */
+DECLINLINE(unsigned) RTDbgReturnTypeSize(RTDBGRETURNTYPE enmRetType)
+{
+    switch (enmRetType)
+    {
+        case RTDBGRETURNTYPE_NEAR16:         return 2;
+        case RTDBGRETURNTYPE_NEAR32:         return 4;
+        case RTDBGRETURNTYPE_NEAR64:         return 8;
+        case RTDBGRETURNTYPE_FAR16:          return 4;
+        case RTDBGRETURNTYPE_FAR32:          return 4;
+        case RTDBGRETURNTYPE_FAR64:          return 8;
+        case RTDBGRETURNTYPE_IRET16:         return 6;
+        case RTDBGRETURNTYPE_IRET32:         return 4*3;
+        case RTDBGRETURNTYPE_IRET32_PRIV:    return 4*5;
+        case RTDBGRETURNTYPE_IRET32_V86:     return 4*9;
+        case RTDBGRETURNTYPE_IRET64:         return 5*8;
+
+        case RTDBGRETURNTYPE_INVALID:
+        case RTDBGRETURNTYPE_END:
+        case RTDBGRETURNTYPE_32BIT_HACK:
+            break;
+    }
+    return 0;
+}
+
+/**
+ * Check if near return.
+ *
+ * @returns true if near, false if far or iret.
+ * @param   enmRetType  The type of return.
+ */
+DECLINLINE(bool) RTDbgReturnTypeIsNear(RTDBGRETURNTYPE enmRetType)
+{
+    return enmRetType == RTDBGRETURNTYPE_NEAR32
+        || enmRetType == RTDBGRETURNTYPE_NEAR64
+        || enmRetType == RTDBGRETURNTYPE_NEAR16;
+}
+
+
+
+/** Magic value for RTDBGUNWINDSTATE::u32Magic (James Moody). */
+#define RTDBGUNWINDSTATE_MAGIC          UINT32_C(0x19250326)
+/** Magic value for RTDBGUNWINDSTATE::u32Magic after use. */
+#define RTDBGUNWINDSTATE_MAGIC_DEAD     UINT32_C(0x20101209)
+
+/**
+ * Unwind machine state.
+ */
+typedef struct RTDBGUNWINDSTATE
+{
+    /** Structure magic (RTDBGUNWINDSTATE_MAGIC) */
+    uint32_t            u32Magic;
+    /** The state architecture. */
+    RTLDRARCH           enmArch;
+
+    /** The program counter register.
+     * amd64/x86: RIP/EIP/IP
+     * sparc: PC
+     * arm32: PC / R15
+     */
+    uint64_t            uPc;
+
+    /** Return type. */
+    RTDBGRETURNTYPE     enmRetType;
+
+    /** Register state (see enmArch). */
+    union
+    {
+        /** RTLDRARCH_AMD64, RTLDRARCH_X86_32 and RTLDRARCH_X86_16. */
+        struct
+        {
+            /** General purpose registers indexed by X86_GREG_XXX. */
+            uint64_t    auRegs[16];
+            /** The frame address. */
+            RTFAR64     FrameAddr;
+            /** Set if we're in real or virtual 8086 mode. */
+            bool        fRealOrV86;
+            /** The flags register. */
+            uint64_t    uRFlags;
+            /** Trap error code. */
+            uint64_t    uErrCd;
+            /** Segment registers (indexed by X86_SREG_XXX). */
+            uint16_t    auSegs[6];
+
+            /** Bitmap tracking register we've loaded and which content can possibly be trusted. */
+            union
+            {
+                /** For effective clearing of the bits. */
+                uint32_t    fAll;
+                /** Detailed view. */
+                struct
+                {
+                    /** Bitmap indicating whether a GPR was loaded (parallel to auRegs). */
+                    uint16_t    fRegs;
+                    /** Bitmap indicating whether a segment register was loaded (parallel to auSegs). */
+                    uint8_t     fSegs;
+                    /** Set if uPc was loaded. */
+                    RT_GCC_EXTENSION uint8_t     fPc : 1;
+                    /** Set if FrameAddr was loaded. */
+                    RT_GCC_EXTENSION uint8_t     fFrameAddr : 1;
+                    /** Set if uRFlags was loaded. */
+                    RT_GCC_EXTENSION uint8_t     fRFlags : 1;
+                    /** Set if uErrCd was loaded. */
+                    RT_GCC_EXTENSION uint8_t     fErrCd : 1;
+                } s;
+            } Loaded;
+        } x86;
+
+        /** @todo add ARM and others as needed. */
+    } u;
+
+    /**
+     * Stack read callback.
+     *
+     * @returns IPRT status code.
+     * @param   pThis       Pointer to this structure.
+     * @param   uSp         The stack pointer address.
+     * @param   cbToRead    The number of bytes to read.
+     * @param   pvDst       Where to put the bytes we read.
+     */
+    DECLCALLBACKMEMBER(int, pfnReadStack,(struct RTDBGUNWINDSTATE *pThis, RTUINTPTR uSp, size_t cbToRead, void *pvDst));
+    /** User argument (useful for pfnReadStack). */
+    void               *pvUser;
+
+} RTDBGUNWINDSTATE;
+
+/**
+ * Try read a 16-bit value off the stack.
+ *
+ * @returns pfnReadStack result.
+ * @param   pThis           The unwind state.
+ * @param   uSrcAddr        The stack address.
+ * @param   puDst           The read destination.
+ */
+DECLINLINE(int) RTDbgUnwindLoadStackU16(PRTDBGUNWINDSTATE pThis, RTUINTPTR uSrcAddr, uint16_t *puDst)
+{
+    return pThis->pfnReadStack(pThis, uSrcAddr, sizeof(*puDst), puDst);
+}
+
+/**
+ * Try read a 32-bit value off the stack.
+ *
+ * @returns pfnReadStack result.
+ * @param   pThis           The unwind state.
+ * @param   uSrcAddr        The stack address.
+ * @param   puDst           The read destination.
+ */
+DECLINLINE(int) RTDbgUnwindLoadStackU32(PRTDBGUNWINDSTATE pThis, RTUINTPTR uSrcAddr, uint32_t *puDst)
+{
+    return pThis->pfnReadStack(pThis, uSrcAddr, sizeof(*puDst), puDst);
+}
+
+/**
+ * Try read a 64-bit value off the stack.
+ *
+ * @returns pfnReadStack result.
+ * @param   pThis           The unwind state.
+ * @param   uSrcAddr        The stack address.
+ * @param   puDst           The read destination.
+ */
+DECLINLINE(int) RTDbgUnwindLoadStackU64(PRTDBGUNWINDSTATE pThis, RTUINTPTR uSrcAddr, uint64_t *puDst)
+{
+    return pThis->pfnReadStack(pThis, uSrcAddr, sizeof(*puDst), puDst);
+}
+
+
+
+/** Max length (including '\\0') of a symbol name. */
+#define RTDBG_SYMBOL_NAME_LENGTH    (512 - 8 - 8 - 8 - 4 - 4 - 8)
+
+/**
+ * Debug symbol.
+ */
+typedef struct RTDBGSYMBOL
+{
+    /** Symbol value (address).
+     * This depends a bit who you ask. It will be the same as offSeg when you
+     * as RTDbgMod, but the mapping address if you ask RTDbgAs. */
+    RTUINTPTR           Value;
+    /** Symbol size. */
+    RTUINTPTR           cb;
+    /** Offset into the segment specified by iSeg. */
+    RTUINTPTR           offSeg;
+    /** Segment number. */
+    RTDBGSEGIDX         iSeg;
+    /** Symbol Flags. (reserved). */
+    uint32_t            fFlags;
+    /** Symbol ordinal.
+     * This is set to UINT32_MAX if the ordinals aren't supported. */
+    uint32_t            iOrdinal;
+    /** Symbol name. */
+    char                szName[RTDBG_SYMBOL_NAME_LENGTH];
+} RTDBGSYMBOL;
+/** Pointer to debug symbol. */
+typedef RTDBGSYMBOL *PRTDBGSYMBOL;
+/** Pointer to const debug symbol. */
+typedef const RTDBGSYMBOL *PCRTDBGSYMBOL;
+
+
+/**
+ * Allocate a new symbol structure.
+ *
+ * @returns Pointer to a new structure on success, NULL on failure.
+ */
+RTDECL(PRTDBGSYMBOL)    RTDbgSymbolAlloc(void);
+
+/**
+ * Duplicates a symbol structure.
+ *
+ * @returns Pointer to duplicate on success, NULL on failure.
+ *
+ * @param   pSymInfo        The symbol info to duplicate.
+ */
+RTDECL(PRTDBGSYMBOL)    RTDbgSymbolDup(PCRTDBGSYMBOL pSymInfo);
+
+/**
+ * Free a symbol structure previously allocated by a RTDbg method.
+ *
+ * @param   pSymInfo        The symbol info to free. NULL is ignored.
+ */
+RTDECL(void)            RTDbgSymbolFree(PRTDBGSYMBOL pSymInfo);
+
+
+/** Max length (including '\\0') of a debug info file name. */
+#define RTDBG_FILE_NAME_LENGTH      (260)
+
+
+/**
+ * Debug line number information.
+ */
+typedef struct RTDBGLINE
+{
+    /** Address.
+     * This depends a bit who you ask. It will be the same as offSeg when you
+     * as RTDbgMod, but the mapping address if you ask RTDbgAs. */
+    RTUINTPTR           Address;
+    /** Offset into the segment specified by iSeg. */
+    RTUINTPTR           offSeg;
+    /** Segment number. */
+    RTDBGSEGIDX         iSeg;
+    /** Line number. */
+    uint32_t            uLineNo;
+    /** Symbol ordinal.
+     * This is set to UINT32_MAX if the ordinals aren't supported. */
+    uint32_t            iOrdinal;
+    /** Filename. */
+    char                szFilename[RTDBG_FILE_NAME_LENGTH];
+} RTDBGLINE;
+/** Pointer to debug line number. */
+typedef RTDBGLINE *PRTDBGLINE;
+/** Pointer to const debug line number. */
+typedef const RTDBGLINE *PCRTDBGLINE;
+
+/**
+ * Allocate a new line number structure.
+ *
+ * @returns Pointer to a new structure on success, NULL on failure.
+ */
+RTDECL(PRTDBGLINE)      RTDbgLineAlloc(void);
+
+/**
+ * Duplicates a line number structure.
+ *
+ * @returns Pointer to duplicate on success, NULL on failure.
+ *
+ * @param   pLine           The line number to duplicate.
+ */
+RTDECL(PRTDBGLINE)      RTDbgLineDup(PCRTDBGLINE pLine);
+
+/**
+ * Free a line number structure previously allocated by a RTDbg method.
+ *
+ * @param   pLine           The line number to free. NULL is ignored.
+ */
+RTDECL(void)            RTDbgLineFree(PRTDBGLINE pLine);
+
+
+/**
+ * Dump the stack of the current thread into @a pszStack.
+ *
+ * This could be a little slow as it reads image and debug info again for each call.
+ *
+ * @returns Length of string returned in @a pszStack.
+ * @param   pszStack        The output buffer.
+ * @param   cbStack         The size of the output buffer.
+ * @param   fFlags          Future flags, MBZ.
+ *
+ * @remarks Not present on all systems and contexts.
+ */
+RTDECL(size_t)          RTDbgStackDumpSelf(char *pszStack, size_t cbStack, uint32_t fFlags);
+
+
+# ifdef IN_RING3
+
+/** @defgroup grp_rt_dbgcfg     RTDbgCfg - Debugging Configuration
+ *
+ * The settings used when loading and processing debug info is kept in a
+ * RTDBGCFG instance since it's generally shared for a whole debugging session
+ * and anyhow would be a major pain to pass as individual parameters to each
+ * call.  The debugging config API not only keeps the settings information but
+ * also provide APIs for making use of it, and in some cases, like for instance
+ * symbol severs, retriving and maintaining it.
+ *
+ * @todo Work in progress - APIs are still missing, adding when needed.
+ *
+ * @{
+ */
+
+/** Debugging configuration handle.  */
+typedef struct RTDBGCFGINT *RTDBGCFG;
+/** Pointer to a debugging configuration handle. */
+typedef RTDBGCFG           *PRTDBGCFG;
+/** NIL debug configuration handle. */
+#define NIL_RTDBGCFG        ((RTDBGCFG)0)
+
+/** @name RTDBGCFG_FLAGS_XXX - Debugging configuration flags.
+ * @{ */
+/** Use deferred loading. */
+#define RTDBGCFG_FLAGS_DEFERRED                     RT_BIT_64(0)
+/** Don't use the symbol server (http). */
+#define RTDBGCFG_FLAGS_NO_SYM_SRV                   RT_BIT_64(1)
+/** Don't use system search paths.
+ * On windows this means not using _NT_ALT_SYMBOL_PATH, _NT_SYMBOL_PATH,
+ * _NT_SOURCE_PATH, and _NT_EXECUTABLE_PATH.
+ * On other systems the effect has yet to be determined. */
+#define RTDBGCFG_FLAGS_NO_SYSTEM_PATHS              RT_BIT_64(2)
+/** Don't search the debug and image paths recursively. */
+#define RTDBGCFG_FLAGS_NO_RECURSIV_SEARCH           RT_BIT_64(3)
+/** Don't search the source paths recursively. */
+#define RTDBGCFG_FLAGS_NO_RECURSIV_SRC_SEARCH       RT_BIT_64(4)
+/** @} */
+
+/**
+ * Debugging configuration properties.
+ *
+ * The search paths are using the DOS convention of semicolon as separator
+ * character.  The the special 'srv' + asterisk syntax known from the windows
+ * debugger search paths are also supported to some extent, as is 'cache' +
+ * asterisk.
+ */
+typedef enum RTDBGCFGPROP
+{
+    /** The customary invalid 0 value. */
+    RTDBGCFGPROP_INVALID = 0,
+    /** RTDBGCFG_FLAGS_XXX.
+     * Env: _FLAGS
+     * The environment variable can be specified as a unsigned value or one or more
+     * mnemonics separated by spaces. */
+    RTDBGCFGPROP_FLAGS,
+    /** List of paths to search for symbol files and images.
+     * Env: _PATH  */
+    RTDBGCFGPROP_PATH,
+    /** List of symbol file suffixes (semicolon separated).
+     * Env: _SUFFIXES  */
+    RTDBGCFGPROP_SUFFIXES,
+    /** List of paths to search for source files.
+     * Env: _SRC_PATH   */
+    RTDBGCFGPROP_SRC_PATH,
+    /** End of valid values. */
+    RTDBGCFGPROP_END,
+    /** The customary 32-bit type hack. */
+    RTDBGCFGPROP_32BIT_HACK = 0x7fffffff
+} RTDBGCFGPROP;
+
+/**
+ * Configuration property change operation.
+ */
+typedef enum RTDBGCFGOP
+{
+    /** Customary invalid 0 value. */
+    RTDBGCFGOP_INVALID = 0,
+    /** Replace the current value with the given one. */
+    RTDBGCFGOP_SET,
+    /** Append the given value to the existing one.  For integer values this is
+     *  considered a bitwise OR operation.  */
+    RTDBGCFGOP_APPEND,
+    /** Prepend the given value to the existing one.  For integer values this is
+     *  considered a bitwise OR operation.  */
+    RTDBGCFGOP_PREPEND,
+    /** Removes the value from the existing one.  For interger values the value is
+     * complemented and ANDed with the existing one, clearing all the specified
+     * flags/bits. */
+    RTDBGCFGOP_REMOVE,
+    /** End of valid values. */
+    RTDBGCFGOP_END,
+    /** Customary 32-bit type hack. */
+    RTDBGCFGOP_32BIT_HACK = 0x7fffffff
+} RTDBGCFGOP;
+
+
+
+/**
+ * Initializes a debugging configuration.
+ *
+ * @returns IPRT status code.
+ * @param   phDbgCfg            Where to return the configuration handle.
+ * @param   pszEnvVarPrefix     The environment variable prefix.  If NULL, the
+ *                              environment is not consulted.
+ * @param   fNativePaths        Whether to pick up native paths from the
+ *                              environment.
+ *
+ * @sa  RTDbgCfgChangeString, RTDbgCfgChangeUInt.
+ */
+RTDECL(int) RTDbgCfgCreate(PRTDBGCFG phDbgCfg, const char *pszEnvVarPrefix, bool fNativePaths);
+
+/**
+ * Retains a new reference to a debugging config.
+ *
+ * @returns New reference count.
+ *          UINT32_MAX is returned if the handle is invalid (asserted).
+ * @param   hDbgCfg             The config handle.
+ */
+RTDECL(uint32_t) RTDbgCfgRetain(RTDBGCFG hDbgCfg);
+
+/**
+ * Releases a references to a debugging config.
+ *
+ * @returns New reference count, if 0 the config was freed.  UINT32_MAX is
+ *          returned if the handle is invalid (asserted).
+ * @param   hDbgCfg             The config handle.
+ */
+RTDECL(uint32_t) RTDbgCfgRelease(RTDBGCFG hDbgCfg);
+
+/**
+ * Changes a property value by string.
+ *
+ * For string values the string is used more or less as given.  For integer
+ * values and flags, it can contains both values (ORed together) or property
+ * specific mnemonics (ORed / ~ANDed).
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_DBG_CFG_INVALID_VALUE
+ * @param   hDbgCfg             The debugging configuration handle.
+ * @param   enmProp             The property to change.
+ * @param   enmOp               How to change the property.
+ * @param   pszValue            The property value to apply.
+ */
+RTDECL(int) RTDbgCfgChangeString(RTDBGCFG hDbgCfg, RTDBGCFGPROP enmProp, RTDBGCFGOP enmOp, const char *pszValue);
+
+/**
+ * Changes a property value by unsigned integer (64-bit).
+ *
+ * This can only be applied to integer and flag properties.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_DBG_CFG_NOT_UINT_PROP
+ * @param   hDbgCfg             The debugging configuration handle.
+ * @param   enmProp             The property to change.
+ * @param   enmOp               How to change the property.
+ * @param   uValue              The property value to apply.
+ */
+RTDECL(int) RTDbgCfgChangeUInt(RTDBGCFG hDbgCfg, RTDBGCFGPROP enmProp, RTDBGCFGOP enmOp, uint64_t uValue);
+
+/**
+ * Query a property value as string.
+ *
+ * Integer and flags properties are returned as a list of mnemonics if possible,
+ * otherwise as simple hex values.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_BUFFER_OVERFLOW if there isn't sufficient buffer space. Nothing
+ *          is written.
+ * @param   hDbgCfg             The debugging configuration handle.
+ * @param   enmProp             The property to change.
+ * @param   pszValue            The output buffer.
+ * @param   cbValue             The size of the output buffer.
+ */
+RTDECL(int) RTDbgCfgQueryString(RTDBGCFG hDbgCfg, RTDBGCFGPROP enmProp, char *pszValue, size_t cbValue);
+
+/**
+ * Query a property value as unsigned integer (64-bit).
+ *
+ * Only integer and flags properties can be queried this way.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_DBG_CFG_NOT_UINT_PROP
+ * @param   hDbgCfg             The debugging configuration handle.
+ * @param   enmProp             The property to change.
+ * @param   puValue             Where to return the value.
+ */
+RTDECL(int) RTDbgCfgQueryUInt(RTDBGCFG hDbgCfg, RTDBGCFGPROP enmProp, uint64_t *puValue);
+
+/**
+ * Log callback.
+ *
+ * @param   hDbgCfg         The debug config instance.
+ * @param   iLevel          The message level.
+ * @param   pszMsg          The message.
+ * @param   pvUser          User argument.
+ */
+typedef DECLCALLBACKTYPE(void, FNRTDBGCFGLOG,(RTDBGCFG hDbgCfg, uint32_t iLevel, const char *pszMsg, void *pvUser));
+/** Pointer to a log callback. */
+typedef FNRTDBGCFGLOG *PFNRTDBGCFGLOG;
+
+/**
+ * Sets the log callback for the configuration.
+ *
+ * This will fail if there is already a log callback present, unless pfnCallback
+ * is NULL.
+ *
+ * @returns IPRT status code.
+ * @param   hDbgCfg             The debugging configuration handle.
+ * @param   pfnCallback         The callback function.  NULL to unset.
+ * @param   pvUser              The user argument.
+ */
+RTDECL(int) RTDbgCfgSetLogCallback(RTDBGCFG hDbgCfg, PFNRTDBGCFGLOG pfnCallback, void *pvUser);
+
+/**
+ * Callback used by the RTDbgCfgOpen function to try out a file that was found.
+ *
+ * @returns On statuses other than VINF_CALLBACK_RETURN and
+ *          VERR_CALLBACK_RETURN the search will continue till the end of the
+ *          list.  These status codes will not necessarily be propagated to the
+ *          caller in any consistent manner.
+ * @retval  VINF_CALLBACK_RETURN if successfully opened the file and it's time
+ *          to return
+ * @retval  VERR_CALLBACK_RETURN if we should stop searching immediately.
+ *
+ * @param   hDbgCfg             The debugging configuration handle.
+ * @param   pszFilename         The path to the file that should be tried out.
+ * @param   pvUser1             First user parameter.
+ * @param   pvUser2             Second user parameter.
+ */
+typedef DECLCALLBACKTYPE(int, FNRTDBGCFGOPEN,(RTDBGCFG hDbgCfg, const char *pszFilename, void *pvUser1, void *pvUser2));
+/** Pointer to a open-file callback used to the RTDbgCfgOpen functions. */
+typedef FNRTDBGCFGOPEN *PFNRTDBGCFGOPEN;
+
+
+RTDECL(int) RTDbgCfgOpenEx(RTDBGCFG hDbgCfg, const char *pszFilename, const char *pszCacheSubDir,
+                           const char *pszUuidMappingSubDir, uint32_t fFlags,
+                           PFNRTDBGCFGOPEN pfnCallback, void *pvUser1, void *pvUser2);
+RTDECL(int) RTDbgCfgOpenPeImage(RTDBGCFG hDbgCfg, const char *pszFilename, uint32_t cbImage, uint32_t uTimestamp,
+                                PFNRTDBGCFGOPEN pfnCallback, void *pvUser1, void *pvUser2);
+RTDECL(int) RTDbgCfgOpenPdb70(RTDBGCFG hDbgCfg, const char *pszFilename, PCRTUUID pUuid, uint32_t uAge,
+                              PFNRTDBGCFGOPEN pfnCallback, void *pvUser1, void *pvUser2);
+RTDECL(int) RTDbgCfgOpenPdb20(RTDBGCFG hDbgCfg, const char *pszFilename, uint32_t cbImage, uint32_t uTimestamp, uint32_t uAge,
+                              PFNRTDBGCFGOPEN pfnCallback, void *pvUser1, void *pvUser2);
+RTDECL(int) RTDbgCfgOpenDbg(RTDBGCFG hDbgCfg, const char *pszFilename, uint32_t cbImage, uint32_t uTimestamp,
+                            PFNRTDBGCFGOPEN pfnCallback, void *pvUser1, void *pvUser2);
+RTDECL(int) RTDbgCfgOpenDwo(RTDBGCFG hDbgCfg, const char *pszFilename, uint32_t uCrc32,
+                            PFNRTDBGCFGOPEN pfnCallback, void *pvUser1, void *pvUser2);
+RTDECL(int) RTDbgCfgOpenDwoBuildId(RTDBGCFG hDbgCfg, const char *pszFilename, const uint8_t *pbBuildId,
+                                   size_t cbBuildId, PFNRTDBGCFGOPEN pfnCallback, void *pvUser1, void *pvUser2);
+RTDECL(int) RTDbgCfgOpenDsymBundle(RTDBGCFG hDbgCfg, const char *pszFilename, PCRTUUID pUuid,
+                                   PFNRTDBGCFGOPEN pfnCallback, void *pvUser1, void *pvUser2);
+RTDECL(int) RTDbgCfgOpenMachOImage(RTDBGCFG hDbgCfg, const char *pszFilename, PCRTUUID pUuid,
+                                   PFNRTDBGCFGOPEN pfnCallback, void *pvUser1, void *pvUser2);
+
+/** @name RTDBGCFG_O_XXX - Open flags for RTDbgCfgOpen.
+ * @{ */
+/** The operative system mask.  The values are RT_OPSYS_XXX. */
+#define RTDBGCFG_O_OPSYS_MASK           UINT32_C(0x000000ff)
+/** Use debuginfod style symbol servers when encountered in the path. */
+#define RTDBGCFG_O_DEBUGINFOD           RT_BIT_32(24)
+/** Same as RTDBGCFG_FLAGS_NO_SYSTEM_PATHS. */
+#define RTDBGCFG_O_NO_SYSTEM_PATHS      RT_BIT_32(25)
+/** The files may be compressed MS styled. */
+#define RTDBGCFG_O_MAYBE_COMPRESSED_MS  RT_BIT_32(26)
+/** Whether to make a recursive search. */
+#define RTDBGCFG_O_RECURSIVE            RT_BIT_32(27)
+/** We're looking for a separate debug file. */
+#define RTDBGCFG_O_EXT_DEBUG_FILE       RT_BIT_32(28)
+/** We're looking for an executable image. */
+#define RTDBGCFG_O_EXECUTABLE_IMAGE     RT_BIT_32(29)
+/** The file search should be done in an case insensitive fashion. */
+#define RTDBGCFG_O_CASE_INSENSITIVE     RT_BIT_32(30)
+/** Use Windbg style symbol servers when encountered in the path. */
+#define RTDBGCFG_O_SYMSRV               RT_BIT_32(31)
+/** Mask of valid flags. */
+#define RTDBGCFG_O_VALID_MASK           UINT32_C(0xff0000ff)
+/** @} */
+
+
+/** @name Static symbol cache configuration
+ * @{ */
+/** The cache subdirectory containing the UUID mappings for .dSYM bundles.
+ * The UUID mappings implemented by IPRT are splitting the image/dsym UUID up
+ * into five 4 digit parts that maps to directories and one twelve digit part
+ * that maps to a symbolic link.  The symlink points to the file in the
+ * Contents/Resources/DWARF/ directory of the .dSYM bundle for a .dSYM map, and
+ * to the image file (Contents/MacOS/bundlename for bundles) for image map.
+ *
+ * According to available documentation, both lldb and gdb are able to use these
+ * UUID maps to find debug info while debugging.  See:
+ *      http://lldb.llvm.org/symbols.html
+ */
+#define RTDBG_CACHE_UUID_MAP_DIR_DSYMS   "dsym-uuids"
+/** The cache subdirectory containing the UUID mappings for image files. */
+#define RTDBG_CACHE_UUID_MAP_DIR_IMAGES  "image-uuids"
+/** Suffix used for the cached .dSYM debug files.
+ * In .dSYM bundles only the .dSYM/Contents/Resources/DWARF/debug-file is
+ * copied into the cache, and in order to not clash with the stripped/rich image
+ * file, the cache tool slaps this suffix onto the name. */
+#define RTDBG_CACHE_DSYM_FILE_SUFFIX     ".dwarf"
+/** @} */
+
+# endif /* IN_RING3 */
+
+/** @} */
+
+
+/** @defgroup grp_rt_dbgas      RTDbgAs - Debug Address Space
+ * @{
+ */
+
+/**
+ * Creates an empty address space.
+ *
+ * @returns IPRT status code.
+ *
+ * @param   phDbgAs         Where to store the address space handle on success.
+ * @param   FirstAddr       The first address in the address space.
+ * @param   LastAddr        The last address in the address space.
+ * @param   pszName         The name of the address space.
+ */
+RTDECL(int) RTDbgAsCreate(PRTDBGAS phDbgAs, RTUINTPTR FirstAddr, RTUINTPTR LastAddr, const char *pszName);
+
+/**
+ * Variant of RTDbgAsCreate that takes a name format string.
+ *
+ * @returns IPRT status code.
+ *
+ * @param   phDbgAs         Where to store the address space handle on success.
+ * @param   FirstAddr       The first address in the address space.
+ * @param   LastAddr        The last address in the address space.
+ * @param   pszNameFmt      The name format of the address space.
+ * @param   va              Format arguments.
+ */
+RTDECL(int) RTDbgAsCreateV(PRTDBGAS phDbgAs, RTUINTPTR FirstAddr, RTUINTPTR LastAddr,
+                           const char *pszNameFmt, va_list va) RT_IPRT_FORMAT_ATTR(4, 0);
+
+/**
+ * Variant of RTDbgAsCreate that takes a name format string.
+ *
+ * @returns IPRT status code.
+ *
+ * @param   phDbgAs         Where to store the address space handle on success.
+ * @param   FirstAddr       The first address in the address space.
+ * @param   LastAddr        The last address in the address space.
+ * @param   pszNameFmt      The name format of the address space.
+ * @param   ...             Format arguments.
+ */
+RTDECL(int) RTDbgAsCreateF(PRTDBGAS phDbgAs, RTUINTPTR FirstAddr, RTUINTPTR LastAddr,
+                           const char *pszNameFmt, ...) RT_IPRT_FORMAT_ATTR(4, 5);
+
+/**
+ * Retains a reference to the address space.
+ *
+ * @returns New reference count, UINT32_MAX on invalid handle (asserted).
+ *
+ * @param   hDbgAs          The address space handle.
+ *
+ * @remarks Will not take any locks.
+ */
+RTDECL(uint32_t) RTDbgAsRetain(RTDBGAS hDbgAs);
+
+/**
+ * Release a reference to the address space.
+ *
+ * When the reference count reaches zero, the address space is destroyed.
+ * That means unlinking all the modules it currently contains, potentially
+ * causing some or all of them to be destroyed as they are managed by
+ * reference counting.
+ *
+ * @returns New reference count, UINT32_MAX on invalid handle (asserted).
+ *
+ * @param   hDbgAs          The address space handle. The NIL handle is quietly
+ *                          ignored and 0 is returned.
+ *
+ * @remarks Will not take any locks.
+ */
+RTDECL(uint32_t) RTDbgAsRelease(RTDBGAS hDbgAs);
+
+/**
+ * Locks the address space for exclusive access.
+ *
+ * @returns IRPT status code
+ * @param   hDbgAs          The address space handle.
+ */
+RTDECL(int) RTDbgAsLockExcl(RTDBGAS hDbgAs);
+
+/**
+ * Counters the actions of one RTDbgAsUnlockExcl call.
+ *
+ * @returns IRPT status code
+ * @param   hDbgAs          The address space handle.
+ */
+RTDECL(int) RTDbgAsUnlockExcl(RTDBGAS hDbgAs);
+
+/**
+ * Gets the name of an address space.
+ *
+ * @returns read only address space name.
+ *          NULL if hDbgAs is invalid.
+ *
+ * @param   hDbgAs          The address space handle.
+ *
+ * @remarks Will not take any locks.
+ */
+RTDECL(const char *) RTDbgAsName(RTDBGAS hDbgAs);
+
+/**
+ * Gets the first address in an address space.
+ *
+ * @returns The address.
+ *          0 if hDbgAs is invalid.
+ *
+ * @param   hDbgAs          The address space handle.
+ *
+ * @remarks Will not take any locks.
+ */
+RTDECL(RTUINTPTR) RTDbgAsFirstAddr(RTDBGAS hDbgAs);
+
+/**
+ * Gets the last address in an address space.
+ *
+ * @returns The address.
+ *          0 if hDbgAs is invalid.
+ *
+ * @param   hDbgAs          The address space handle.
+ *
+ * @remarks Will not take any locks.
+ */
+RTDECL(RTUINTPTR) RTDbgAsLastAddr(RTDBGAS hDbgAs);
+
+/**
+ * Gets the number of modules in the address space.
+ *
+ * This can be used together with RTDbgAsModuleByIndex
+ * to enumerate the modules.
+ *
+ * @returns The number of modules.
+ *
+ * @param   hDbgAs          The address space handle.
+ *
+ * @remarks Will not take any locks.
+ */
+RTDECL(uint32_t) RTDbgAsModuleCount(RTDBGAS hDbgAs);
+
+/** @name Flags for RTDbgAsModuleLink and RTDbgAsModuleLinkSeg
+ * @{ */
+/** Replace all conflicting module.
+ * (The conflicting modules will be removed the address space and their
+ * references released.) */
+#define RTDBGASLINK_FLAGS_REPLACE       RT_BIT_32(0)
+/** Mask containing the valid flags. */
+#define RTDBGASLINK_FLAGS_VALID_MASK    UINT32_C(0x00000001)
+/** @} */
+
+/**
+ * Links a module into the address space at the give address.
+ *
+ * The size of the mapping is determined using RTDbgModImageSize().
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_OUT_OF_RANGE if the specified address will put the module
+ *          outside the address space.
+ * @retval  VERR_ADDRESS_CONFLICT if the mapping clashes with existing mappings.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   hDbgMod         The module handle of the module to be linked in.
+ * @param   ImageAddr       The address to link the module at.
+ * @param   fFlags          See RTDBGASLINK_FLAGS_*.
+ */
+RTDECL(int) RTDbgAsModuleLink(RTDBGAS hDbgAs, RTDBGMOD hDbgMod, RTUINTPTR ImageAddr, uint32_t fFlags);
+
+/**
+ * Links a segment into the address space at the give address.
+ *
+ * The size of the mapping is determined using RTDbgModSegmentSize().
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_OUT_OF_RANGE if the specified address will put the module
+ *          outside the address space.
+ * @retval  VERR_ADDRESS_CONFLICT if the mapping clashes with existing mappings.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   hDbgMod         The module handle.
+ * @param   iSeg            The segment number (0-based) of the segment to be
+ *                          linked in.
+ * @param   SegAddr         The address to link the segment at.
+ * @param   fFlags          See RTDBGASLINK_FLAGS_*.
+ */
+RTDECL(int) RTDbgAsModuleLinkSeg(RTDBGAS hDbgAs, RTDBGMOD hDbgMod, RTDBGSEGIDX iSeg, RTUINTPTR SegAddr, uint32_t fFlags);
+
+/**
+ * Unlinks all the mappings of a module from the address space.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_NOT_FOUND if the module wasn't found.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   hDbgMod         The module handle of the module to be unlinked.
+ */
+RTDECL(int) RTDbgAsModuleUnlink(RTDBGAS hDbgAs, RTDBGMOD hDbgMod);
+
+/**
+ * Unlinks the mapping at the specified address.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_NOT_FOUND if no module or segment is mapped at that address.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   Addr            The address within the mapping to be unlinked.
+ */
+RTDECL(int) RTDbgAsModuleUnlinkByAddr(RTDBGAS hDbgAs, RTUINTPTR Addr);
+
+/**
+ * Get a the handle of a module in the address space by is index.
+ *
+ * @returns A retained handle to the specified module. The caller must release
+ *          the returned reference.
+ *          NIL_RTDBGMOD if invalid index or handle.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   iModule         The index of the module to get.
+ *
+ * @remarks The module indexes may change after calls to RTDbgAsModuleLink,
+ *          RTDbgAsModuleLinkSeg, RTDbgAsModuleUnlink and
+ *          RTDbgAsModuleUnlinkByAddr.
+ */
+RTDECL(RTDBGMOD) RTDbgAsModuleByIndex(RTDBGAS hDbgAs, uint32_t iModule);
+
+/**
+ * Queries mapping module information by handle.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_NOT_FOUND if no mapping was found at the specified address.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   Addr            Address within the mapping of the module or segment.
+ * @param   phMod           Where to the return the retained module handle.
+ *                          Optional.
+ * @param   pAddr           Where to return the base address of the mapping.
+ *                          Optional.
+ * @param   piSeg           Where to return the segment index. This is set to
+ *                          NIL if the entire module is mapped as a single
+ *                          mapping. Optional.
+ */
+RTDECL(int) RTDbgAsModuleByAddr(RTDBGAS hDbgAs, RTUINTPTR Addr, PRTDBGMOD phMod, PRTUINTPTR pAddr, PRTDBGSEGIDX piSeg);
+
+/**
+ * Queries mapping module information by name.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_NOT_FOUND if no mapping was found at the specified address.
+ * @retval  VERR_OUT_OF_RANGE if the name index was out of range.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   pszName         The module name.
+ * @param   iName           There can be more than one module by the same name
+ *                          in an address space. This argument indicates which
+ *                          is meant. (0 based)
+ * @param   phMod           Where to the return the retained module handle.
+ */
+RTDECL(int) RTDbgAsModuleByName(RTDBGAS hDbgAs, const char *pszName, uint32_t iName, PRTDBGMOD phMod);
+
+/**
+ * Information about a mapping.
+ *
+ * This is used by RTDbgAsModuleGetMapByIndex.
+ */
+typedef struct RTDBGASMAPINFO
+{
+    /** The mapping address. */
+    RTUINTPTR       Address;
+    /** The segment mapped there.
+     *  This is NIL_RTDBGSEGIDX if the entire module image is mapped here. */
+    RTDBGSEGIDX     iSeg;
+} RTDBGASMAPINFO;
+/** Pointer to info about an address space mapping. */
+typedef RTDBGASMAPINFO *PRTDBGASMAPINFO;
+/** Pointer to const info about an address space mapping. */
+typedef RTDBGASMAPINFO const *PCRTDBGASMAPINFO;
+
+/**
+ * Queries mapping information for a module given by index.
+ *
+ * @returns IRPT status code.
+ * @retval  VERR_INVALID_HANDLE if hDbgAs is invalid.
+ * @retval  VERR_OUT_OF_RANGE if the name index was out of range.
+ * @retval  VINF_BUFFER_OVERFLOW if the array is too small and the returned
+ *          information is incomplete.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   iModule         The index of the module to get.
+ * @param   paMappings      Where to return the mapping information.  The buffer
+ *                          size is given by *pcMappings.
+ * @param   pcMappings      IN: Size of the paMappings array. OUT: The number of
+ *                          entries returned.
+ * @param   fFlags          Flags for reserved for future use. MBZ.
+ *
+ * @remarks See remarks for RTDbgAsModuleByIndex regarding the volatility of the
+ *          iModule parameter.
+ */
+RTDECL(int) RTDbgAsModuleQueryMapByIndex(RTDBGAS hDbgAs, uint32_t iModule, PRTDBGASMAPINFO paMappings, uint32_t *pcMappings, uint32_t fFlags);
+
+/**
+ * Adds a symbol to a module in the address space.
+ *
+ * @returns IPRT status code. See RTDbgModSymbolAdd for more specific ones.
+ * @retval  VERR_INVALID_HANDLE if hDbgAs is invalid.
+ * @retval  VERR_NOT_FOUND if no module was found at the specified address.
+ * @retval  VERR_NOT_SUPPORTED if the module interpret doesn't support adding
+ *          custom symbols.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   pszSymbol       The symbol name.
+ * @param   Addr            The address of the symbol.
+ * @param   cb              The size of the symbol.
+ * @param   fFlags          Symbol flags, RTDBGSYMBOLADD_F_XXX.
+ * @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
+ */
+RTDECL(int) RTDbgAsSymbolAdd(RTDBGAS hDbgAs, const char *pszSymbol, RTUINTPTR Addr, RTUINTPTR cb, uint32_t fFlags, uint32_t *piOrdinal);
+
+/**
+ * Query a symbol by address.
+ *
+ * @returns IPRT status code. See RTDbgModSymbolAddr for more specific ones.
+ * @retval  VERR_INVALID_HANDLE if hDbgAs is invalid.
+ * @retval  VERR_NOT_FOUND if the address couldn't be mapped to a module.
+ * @retval  VERR_INVALID_PARAMETER if incorrect flags.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   Addr            The address which closest symbol is requested.
+ * @param   fFlags          Symbol search flags, see RTDBGSYMADDR_FLAGS_XXX.
+ * @param   poffDisp        Where to return the distance between the symbol
+ *                          and address. Optional.
+ * @param   pSymbol         Where to return the symbol info.
+ * @param   phMod           Where to return the module handle. Optional.
+ */
+RTDECL(int) RTDbgAsSymbolByAddr(RTDBGAS hDbgAs, RTUINTPTR Addr, uint32_t fFlags,
+                                PRTINTPTR poffDisp, PRTDBGSYMBOL pSymbol, PRTDBGMOD phMod);
+
+/**
+ * Query a symbol by address.
+ *
+ * @returns IPRT status code. See RTDbgModSymbolAddrA for more specific ones.
+ * @retval  VERR_INVALID_HANDLE if hDbgAs is invalid.
+ * @retval  VERR_NOT_FOUND if the address couldn't be mapped to a module.
+ * @retval  VERR_INVALID_PARAMETER if incorrect flags.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   Addr            The address which closest symbol is requested.
+ * @param   fFlags          Symbol search flags, see RTDBGSYMADDR_FLAGS_XXX.
+ * @param   poffDisp        Where to return the distance between the symbol
+ *                          and address. Optional.
+ * @param   ppSymInfo       Where to return the pointer to the allocated symbol
+ *                          info. Always set. Free with RTDbgSymbolFree.
+ * @param   phMod           Where to return the module handle. Optional.
+ */
+RTDECL(int) RTDbgAsSymbolByAddrA(RTDBGAS hDbgAs, RTUINTPTR Addr, uint32_t fFlags,
+                                 PRTINTPTR poffDisp, PRTDBGSYMBOL *ppSymInfo, PRTDBGMOD phMod);
+
+/**
+ * Query a symbol by name.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_SYMBOL_NOT_FOUND if not found.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   pszSymbol       The symbol name. It is possible to limit the scope
+ *                          of the search by prefixing the symbol with a module
+ *                          name pattern followed by a bang (!) character.
+ *                          RTStrSimplePatternNMatch is used for the matching.
+ * @param   pSymbol         Where to return the symbol info.
+ * @param   phMod           Where to return the module handle. Optional.
+ */
+RTDECL(int) RTDbgAsSymbolByName(RTDBGAS hDbgAs, const char *pszSymbol, PRTDBGSYMBOL pSymbol, PRTDBGMOD phMod);
+
+/**
+ * Query a symbol by name, allocating the returned symbol structure.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_SYMBOL_NOT_FOUND if not found.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   pszSymbol       The symbol name. See RTDbgAsSymbolByName for more.
+ * @param   ppSymbol        Where to return the pointer to the allocated
+ *                          symbol info. Always set. Free with RTDbgSymbolFree.
+ * @param   phMod           Where to return the module handle. Optional.
+ */
+RTDECL(int) RTDbgAsSymbolByNameA(RTDBGAS hDbgAs, const char *pszSymbol, PRTDBGSYMBOL *ppSymbol, PRTDBGMOD phMod);
+
+/**
+ * Adds a line number to a module in the address space.
+ *
+ * @returns IPRT status code. See RTDbgModLineAdd for more specific ones.
+ * @retval  VERR_INVALID_HANDLE if hDbgAs is invalid.
+ * @retval  VERR_NOT_FOUND if no module was found at the specified address.
+ * @retval  VERR_NOT_SUPPORTED if the module interpret doesn't support adding
+ *          custom symbols.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   pszFile         The file name.
+ * @param   uLineNo         The line number.
+ * @param   Addr            The address of the symbol.
+ * @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.
+ */
+RTDECL(int) RTDbgAsLineAdd(RTDBGAS hDbgAs, const char *pszFile, uint32_t uLineNo, RTUINTPTR Addr, uint32_t *piOrdinal);
+
+/**
+ * Query a line number by address.
+ *
+ * @returns IPRT status code. See RTDbgModLineAddrA for more specific ones.
+ * @retval  VERR_INVALID_HANDLE if hDbgAs is invalid.
+ * @retval  VERR_NOT_FOUND if the address couldn't be mapped to a module.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   Addr            The address which closest symbol is requested.
+ * @param   poffDisp        Where to return the distance between the line
+ *                          number and address.
+ * @param   pLine           Where to return the line number information.
+ * @param   phMod           Where to return the module handle. Optional.
+ */
+RTDECL(int) RTDbgAsLineByAddr(RTDBGAS hDbgAs, RTUINTPTR Addr, PRTINTPTR poffDisp, PRTDBGLINE pLine, PRTDBGMOD phMod);
+
+/**
+ * Query a line number by address.
+ *
+ * @returns IPRT status code. See RTDbgModLineAddrA for more specific ones.
+ * @retval  VERR_INVALID_HANDLE if hDbgAs is invalid.
+ * @retval  VERR_NOT_FOUND if the address couldn't be mapped to a module.
+ *
+ * @param   hDbgAs          The address space handle.
+ * @param   Addr            The address which closest symbol is requested.
+ * @param   poffDisp        Where to return the distance between the line
+ *                          number and address.
+ * @param   ppLine          Where to return the pointer to the allocated line
+ *                          number info. Always set. Free with RTDbgLineFree.
+ * @param   phMod           Where to return the module handle. Optional.
+ */
+RTDECL(int) RTDbgAsLineByAddrA(RTDBGAS hDbgAs, RTUINTPTR Addr, PRTINTPTR poffDisp, PRTDBGLINE *ppLine, PRTDBGMOD phMod);
+
+/** @todo Missing some bits here. */
+
+/** @} */
+
+
+# ifdef IN_RING3
+/** @defgroup grp_rt_dbgmod     RTDbgMod - Debug Module Interpreter
+ * @{
+ */
+
+/**
+ * Creates a module based on the default debug info container.
+ *
+ * This can be used to manually load a module and its symbol. The primary user
+ * group is the debug info interpreters, which use this API to create an
+ * efficient debug info container behind the scenes and forward all queries to
+ * it once the info has been loaded.
+ *
+ * @returns IPRT status code.
+ *
+ * @param   phDbgMod        Where to return the module handle.
+ * @param   pszName         The name of the module (mandatory).
+ * @param   cbSeg           The size of initial segment. If zero, segments will
+ *                          have to be added manually using RTDbgModSegmentAdd.
+ * @param   fFlags          Flags reserved for future extensions, MBZ for now.
+ */
+RTDECL(int)         RTDbgModCreate(PRTDBGMOD phDbgMod, const char *pszName, RTUINTPTR cbSeg, uint32_t fFlags);
+
+RTDECL(int)         RTDbgModCreateFromImage(PRTDBGMOD phDbgMod, const char *pszFilename, const char *pszName,
+                                            RTLDRARCH enmArch, RTDBGCFG hDbgCfg);
+RTDECL(int)         RTDbgModCreateFromMap(PRTDBGMOD phDbgMod, const char *pszFilename, const char *pszName, RTUINTPTR uSubtrahend,
+                                          RTDBGCFG hDbgCfg);
+RTDECL(int)         RTDbgModCreateFromPeImage(PRTDBGMOD phDbgMod, const char *pszFilename, const char *pszName,
+                                              PRTLDRMOD phLdrMod, uint32_t cbImage, uint32_t uTimeDateStamp, RTDBGCFG hDbgCfg);
+RTDECL(int)         RTDbgModCreateFromDbg(PRTDBGMOD phDbgMod, const char *pszFilename, const char *pszName, uint32_t cbImage,
+                                          uint32_t uTimeDateStamp, RTDBGCFG hDbgCfg);
+RTDECL(int)         RTDbgModCreateFromPdb(PRTDBGMOD phDbgMod, const char *pszFilename, const char *pszName, uint32_t cbImage,
+                                          PCRTUUID pUuid, uint32_t Age, RTDBGCFG hDbgCfg);
+RTDECL(int)         RTDbgModCreateFromDwo(PRTDBGMOD phDbgMod, const char *pszFilename, const char *pszName, uint32_t cbImage,
+                                          uint32_t uCrc32, RTDBGCFG hDbgCfg);
+RTDECL(int)         RTDbgModCreateFromMachOImage(PRTDBGMOD phDbgMod, const char *pszFilename, const char *pszName,
+                                                 RTLDRARCH enmArch, PRTLDRMOD phLdrModIn, uint32_t cbImage, uint32_t cSegs,
+                                                 PCRTDBGSEGMENT paSegs, PCRTUUID pUuid, RTDBGCFG hDbgCfg, uint32_t fFlags);
+
+/** @name Flags for RTDbgModCreate and friends.
+ * @{ */
+/** Overrides the hDbgCfg settings and forces an image and/or symbol file
+ *  search.  RTDbgModCreate will quietly ignore this flag. */
+#define RTDBGMOD_F_NOT_DEFERRED         RT_BIT_32(0)
+/** Mach-O: Load the __LINKEDIT segment (@sa RTLDR_O_MACHO_LOAD_LINKEDIT). */
+#define RTDBGMOD_F_MACHO_LOAD_LINKEDIT  RT_BIT_32(1)
+/** Valid flag mask. */
+#define RTDBGMOD_F_VALID_MASK           UINT32_C(0x00000003)
+/** @} */
+
+
+/**
+ * Retains another reference to the module.
+ *
+ * @returns New reference count, UINT32_MAX on invalid handle (asserted).
+ *
+ * @param   hDbgMod         The module handle.
+ *
+ * @remarks Will not take any locks.
+ */
+RTDECL(uint32_t)    RTDbgModRetain(RTDBGMOD hDbgMod);
+
+/**
+ * Release a reference to the module.
+ *
+ * When the reference count reaches zero, the module is destroyed.
+ *
+ * @returns New reference count, UINT32_MAX on invalid handle (asserted).
+ *
+ * @param   hDbgMod         The module handle. The NIL handle is quietly ignored
+ *                          and 0 is returned.
+ *
+ * @remarks Will not take any locks.
+ */
+RTDECL(uint32_t)    RTDbgModRelease(RTDBGMOD hDbgMod);
+
+/**
+ * Removes all content from the debug module (container), optionally only
+ * leaving segments and image size intact.
+ *
+ * This is only possible on container modules, i.e. created by RTDbgModCreate().
+ *
+ * @returns IPRT status code.
+ * @param   hDbgMod         The module handle.
+ * @param   fLeaveSegments  Whether to leave segments (and image size) as is.
+ */
+RTDECL(int)         RTDbgModRemoveAll(RTDBGMOD hDbgMod, bool fLeaveSegments);
+
+/**
+ * Gets the module name.
+ *
+ * @returns Pointer to a read only string containing the name.
+ *
+ * @param   hDbgMod         The module handle.
+ */
+RTDECL(const char *) RTDbgModName(RTDBGMOD hDbgMod);
+
+/**
+ * Gets the name of the debug info file we're using.
+ *
+ * @returns Pointer to a read only string containing the filename, NULL if we
+ *          don't use one.
+ *
+ * @param   hDbgMod         The module handle.
+ */
+RTDECL(const char *) RTDbgModDebugFile(RTDBGMOD hDbgMod);
+
+/**
+ * Gets the image filename (as specified by the user).
+ *
+ * @returns Pointer to a read only string containing the filename.
+ *
+ * @param   hDbgMod         The module handle.
+ */
+RTDECL(const char *) RTDbgModImageFile(RTDBGMOD hDbgMod);
+
+/**
+ * Gets the image filename actually used if it differs from RTDbgModImageFile.
+ *
+ * @returns Pointer to a read only string containing the filename, NULL if same
+ *          as RTDBgModImageFile.
+ *
+ * @param   hDbgMod         The module handle.
+ */
+RTDECL(const char *) RTDbgModImageFileUsed(RTDBGMOD hDbgMod);
+
+/**
+ * Checks if the loading of the debug info has been postponed.
+ *
+ * @returns true if postponed, false if not or invalid handle.
+ * @param   hDbgMod         The module handle.
+ */
+RTDECL(bool)        RTDbgModIsDeferred(RTDBGMOD hDbgMod);
+
+/**
+ * Checks if the debug info is exports only.
+ *
+ * @returns true if exports only, false if not or invalid handle.
+ * @param   hDbgMod         The module handle.
+ */
+RTDECL(bool)        RTDbgModIsExports(RTDBGMOD hDbgMod);
+
+/**
+ * Converts an image relative address to a segment:offset address.
+ *
+ * @returns Segment index on success.
+ *          NIL_RTDBGSEGIDX is returned if the module handle or the RVA are
+ *          invalid.
+ *
+ * @param   hDbgMod         The module handle.
+ * @param   uRva            The image relative address to convert.
+ * @param   poffSeg         Where to return the segment offset. Optional.
+ */
+RTDECL(RTDBGSEGIDX) RTDbgModRvaToSegOff(RTDBGMOD hDbgMod, RTUINTPTR uRva, PRTUINTPTR poffSeg);
+
+/**
+ * Gets the module tag value if any.
+ *
+ * @returns The tag. 0 if hDbgMod is invalid.
+ *
+ * @param   hDbgMod         The module handle.
+ */
+RTDECL(uint64_t)    RTDbgModGetTag(RTDBGMOD hDbgMod);
+
+/**
+ * Tags or untags the module.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_INVALID_HANDLE if hDbgMod is invalid.
+ *
+ * @param   hDbgMod         The module handle.
+ * @param   uTag            The tag value.  The convention is that 0 is no tag
+ *                          and any other value means it's tagged.  It's adviced
+ *                          to use some kind of unique number like an address
+ *                          (global or string cache for instance) to avoid
+ *                          collisions with other users
+ */
+RTDECL(int)         RTDbgModSetTag(RTDBGMOD hDbgMod, uint64_t uTag);
+
+
+/**
+ * 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.
+ *          RTUINTPTR_MAX is returned if the handle is invalid.
+ *
+ * @param   hDbgMod         The module handle.
+ */
+RTDECL(RTUINTPTR)   RTDbgModImageSize(RTDBGMOD hDbgMod);
+
+/**
+ * Gets the image format.
+ *
+ * @returns Image format.
+ * @retval  RTLDRFMT_INVALID if the handle is invalid or if the format isn't known.
+ * @param   hDbgMod         The debug module handle.
+ * @sa      RTLdrGetFormat
+ */
+RTDECL(RTLDRFMT)    RTDbgModImageGetFormat(RTDBGMOD hDbgMod);
+
+/**
+ * Gets the image architecture.
+ *
+ * @returns Image architecture.
+ * @retval  RTLDRARCH_INVALID if the handle is invalid.
+ * @retval  RTLDRARCH_WHATEVER if unknown.
+ * @param   hDbgMod         The debug module handle.
+ * @sa      RTLdrGetArch
+ */
+RTDECL(RTLDRARCH)   RTDbgModImageGetArch(RTDBGMOD hDbgMod);
+
+/**
+ * Generic method for querying image properties.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_NOT_SUPPORTED if the property query isn't supported (either all
+ *          or that specific property).  The caller must handle this result.
+ * @retval  VERR_NOT_FOUND the property was not found in the module.  The caller
+ *          must also normally deal with this.
+ * @retval  VERR_INVALID_FUNCTION if the function value is wrong.
+ * @retval  VERR_INVALID_PARAMETER if the fixed buffer size is wrong. Correct
+ *          size in @a *pcbRet.
+ * @retval  VERR_BUFFER_OVERFLOW if the function doesn't have a fixed size
+ *          buffer and the buffer isn't big enough. Correct size in @a *pcbRet.
+ * @retval  VERR_INVALID_HANDLE if the handle is invalid.
+ *
+ * @param   hDbgMod         The debug module handle.
+ * @param   enmProp         The property to query.
+ * @param   pvBuf           Pointer to the input / output buffer.  In most cases
+ *                          it's only used for returning data.
+ * @param   cbBuf           The size of the buffer.
+ * @param   pcbRet          Where to return the amount of data returned.  On
+ *                          buffer size errors, this is set to the correct size.
+ *                          Optional.
+ * @sa      RTLdrQueryPropEx
+ */
+RTDECL(int)         RTDbgModImageQueryProp(RTDBGMOD hDbgMod, RTLDRPROP enmProp, void *pvBuf, size_t cbBuf, size_t *pcbRet);
+
+
+/**
+ * Adds a segment to the module. Optional feature.
+ *
+ * This method is intended used for manually constructing debug info for a
+ * module. The main usage is from other debug info interpreters that want to
+ * avoid writing a debug info database and instead uses the standard container
+ * behind the scenes.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_NOT_SUPPORTED if this feature isn't support by the debug info
+ *          interpreter. This is a common return code.
+ * @retval  VERR_INVALID_HANDLE if hDbgMod is invalid.
+ * @retval  VERR_DBG_ADDRESS_WRAP if uRva+cb wraps around.
+ * @retval  VERR_DBG_SEGMENT_NAME_OUT_OF_RANGE if pszName is too short or long.
+ * @retval  VERR_INVALID_PARAMETER if fFlags contains undefined flags.
+ * @retval  VERR_DBG_SPECIAL_SEGMENT if *piSeg is a special segment.
+ * @retval  VERR_DBG_INVALID_SEGMENT_INDEX if *piSeg doesn't meet expectations.
+ *
+ * @param   hDbgMod             The module handle.
+ * @param   uRva                The image relative address of the segment.
+ * @param   cb                  The size of the segment.
+ * @param   pszName             The segment name. Does not normally need to be
+ *                              unique, although this is somewhat up to the
+ *                              debug interpreter to decide.
+ * @param   fFlags              Segment flags. Reserved for future used, MBZ.
+ * @param   piSeg               The segment index or NIL_RTDBGSEGIDX on input.
+ *                              The assigned segment index on successful return.
+ *                              Optional.
+ */
+RTDECL(int)         RTDbgModSegmentAdd(RTDBGMOD hDbgMod, RTUINTPTR uRva, RTUINTPTR cb, const char *pszName,
+                                       uint32_t fFlags, PRTDBGSEGIDX piSeg);
+
+/**
+ * Gets the number of segments in the module.
+ *
+ * This is can be used to determine the range which can be passed to
+ * RTDbgModSegmentByIndex and derivates.
+ *
+ * @returns The segment relative address.
+ *          NIL_RTDBGSEGIDX if the handle is invalid.
+ *
+ * @param   hDbgMod         The module handle.
+ */
+RTDECL(RTDBGSEGIDX) RTDbgModSegmentCount(RTDBGMOD hDbgMod);
+
+/**
+ * Query information about a segment.
+ *
+ * This can be used together with RTDbgModSegmentCount to enumerate segments.
+ * The index starts a 0 and stops one below RTDbgModSegmentCount.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_DBG_INVALID_SEGMENT_INDEX if iSeg is too high.
+ * @retval  VERR_DBG_SPECIAL_SEGMENT if iSeg indicates a special segment.
+ * @retval  VERR_INVALID_HANDLE if hDbgMod is invalid.
+ *
+ * @param   hDbgMod         The module handle.
+ * @param   iSeg            The segment index. No special segments.
+ * @param   pSegInfo        Where to return the segment info. The
+ *                          RTDBGSEGMENT::Address member will be set to
+ *                          RTUINTPTR_MAX or the load address used at link time.
+ */
+RTDECL(int)         RTDbgModSegmentByIndex(RTDBGMOD hDbgMod, RTDBGSEGIDX iSeg, PRTDBGSEGMENT pSegInfo);
+
+/**
+ * Gets the size of a segment.
+ *
+ * This is a just a wrapper around RTDbgModSegmentByIndex.
+ *
+ * @returns The segment size.
+ *          RTUINTPTR_MAX is returned if either the handle and segment index are
+ *          invalid.
+ *
+ * @param   hDbgMod         The module handle.
+ * @param   iSeg            The segment index. RTDBGSEGIDX_ABS is not allowed.
+ *                          If RTDBGSEGIDX_RVA is used, the functions returns
+ *                          the same value as RTDbgModImageSize.
+ */
+RTDECL(RTUINTPTR)   RTDbgModSegmentSize(RTDBGMOD hDbgMod, RTDBGSEGIDX iSeg);
+
+/**
+ * Gets the image relative address of a segment.
+ *
+ * This is a just a wrapper around RTDbgModSegmentByIndex.
+ *
+ * @returns The segment relative address.
+ *          RTUINTPTR_MAX is returned if either the handle and segment index are
+ *          invalid.
+ *
+ * @param   hDbgMod         The module handle.
+ * @param   iSeg            The segment index. No special segment indexes
+ *                          allowed (asserted).
+ */
+RTDECL(RTUINTPTR)   RTDbgModSegmentRva(RTDBGMOD hDbgMod, RTDBGSEGIDX iSeg);
+
+
+/**
+ * Adds a line number to the module.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_NOT_SUPPORTED if the module interpret doesn't support adding
+ *          custom symbols. This is a common place occurrence.
+ * @retval  VERR_INVALID_HANDLE if hDbgMod is invalid.
+ * @retval  VERR_DBG_SYMBOL_NAME_OUT_OF_RANGE if the symbol name is too long or
+ *          short.
+ * @retval  VERR_DBG_INVALID_RVA if an image relative address is specified and
+ *          it's not inside any of the segments defined by the module.
+ * @retval  VERR_DBG_INVALID_SEGMENT_INDEX if the segment index isn't valid.
+ * @retval  VERR_DBG_INVALID_SEGMENT_OFFSET if the segment offset is beyond the
+ *          end of the segment.
+ * @retval  VERR_DBG_ADDRESS_WRAP if off+cb wraps around.
+ * @retval  VERR_INVALID_PARAMETER if the symbol flags sets undefined bits.
+ * @retval  VERR_DBG_DUPLICATE_SYMBOL
+ * @retval  VERR_DBG_ADDRESS_CONFLICT
+ *
+ * @param   hDbgMod         The module handle.
+ * @param   pszSymbol       The symbol name.
+ * @param   iSeg            The segment index.
+ * @param   off             The segment offset.
+ * @param   cb              The size of the symbol. Can be zero, although this
+ *                          may depend somewhat on the debug interpreter.
+ * @param   fFlags          Symbol flags, RTDBGSYMBOLADD_F_XXX.
+ * @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.
+ */
+RTDECL(int)         RTDbgModSymbolAdd(RTDBGMOD hDbgMod, const char *pszSymbol, RTDBGSEGIDX iSeg, RTUINTPTR off,
+                                      RTUINTPTR cb, uint32_t fFlags, uint32_t *piOrdinal);
+
+/**
+ * Gets the symbol count.
+ *
+ * This can be used together wtih RTDbgModSymbolByOrdinal or
+ * RTDbgModSymbolByOrdinalA to enumerate all the symbols.
+ *
+ * @returns The number of symbols in the module.
+ *          UINT32_MAX is returned if the module handle is invalid or some other
+ *          error occurs.
+ *
+ * @param   hDbgMod             The module handle.
+ */
+RTDECL(uint32_t)    RTDbgModSymbolCount(RTDBGMOD hDbgMod);
+
+/**
+ * Queries symbol information by ordinal number.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_SYMBOL_NOT_FOUND if there is no symbol at the given number.
+ * @retval  VERR_DBG_NO_SYMBOLS if there aren't any symbols.
+ * @retval  VERR_INVALID_HANDLE if hDbgMod is invalid.
+ * @retval  VERR_NOT_SUPPORTED if lookup by ordinal is not supported.
+ *
+ * @param   hDbgMod             The module handle.
+ * @param   iOrdinal            The symbol ordinal number. 0-based. The highest
+ *                              number is RTDbgModSymbolCount() - 1.
+ * @param   pSymInfo            Where to store the symbol information.
+ */
+RTDECL(int)         RTDbgModSymbolByOrdinal(RTDBGMOD hDbgMod, uint32_t iOrdinal, PRTDBGSYMBOL pSymInfo);
+
+/**
+ * Queries symbol information by ordinal number.
+ *
+ * @returns IPRT 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 the given number.
+ * @retval  VERR_NO_MEMORY if RTDbgSymbolAlloc fails.
+ *
+ * @param   hDbgMod             The module handle.
+ * @param   iOrdinal            The symbol ordinal number. 0-based. The highest
+ *                              number is RTDbgModSymbolCount() - 1.
+ * @param   ppSymInfo           Where to store the pointer to the returned
+ *                              symbol information. Always set. Free with
+ *                              RTDbgSymbolFree.
+ */
+RTDECL(int)         RTDbgModSymbolByOrdinalA(RTDBGMOD hDbgMod, uint32_t iOrdinal, PRTDBGSYMBOL *ppSymInfo);
+
+/**
+ * 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  VERR_SYMBOL_NOT_FOUND if no suitable symbol was found.
+ * @retval  VERR_DBG_NO_SYMBOLS if there aren't any symbols.
+ * @retval  VERR_INVALID_HANDLE if hDbgMod is invalid.
+ * @retval  VERR_DBG_INVALID_RVA if an image relative address is specified and
+ *          it's not inside any of the segments defined by the module.
+ * @retval  VERR_DBG_INVALID_SEGMENT_INDEX if the segment index isn't valid.
+ * @retval  VERR_DBG_INVALID_SEGMENT_OFFSET if the segment offset is beyond the
+ *          end of the segment.
+ * @retval  VERR_INVALID_PARAMETER if incorrect flags.
+ *
+ * @param   hDbgMod             The module handle.
+ * @param   iSeg                The segment number.
+ * @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.
+ */
+RTDECL(int)         RTDbgModSymbolByAddr(RTDBGMOD hDbgMod, RTDBGSEGIDX iSeg, RTUINTPTR off, uint32_t fFlags,
+                                         PRTINTPTR poffDisp, 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  VERR_SYMBOL_NOT_FOUND if no suitable symbol was found.
+ * @retval  VERR_DBG_NO_SYMBOLS if there aren't any symbols.
+ * @retval  VERR_INVALID_HANDLE if hDbgMod is invalid.
+ * @retval  VERR_DBG_INVALID_RVA if an image relative address is specified and
+ *          it's not inside any of the segments defined by the module.
+ * @retval  VERR_DBG_INVALID_SEGMENT_INDEX if the segment index isn't valid.
+ * @retval  VERR_DBG_INVALID_SEGMENT_OFFSET if the segment offset is beyond the
+ *          end of the segment.
+ * @retval  VERR_NO_MEMORY if RTDbgSymbolAlloc fails.
+ * @retval  VERR_INVALID_PARAMETER if incorrect flags.
+ *
+ * @param   hDbgMod             The module handle.
+ * @param   iSeg                The segment index.
+ * @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   ppSymInfo           Where to store the pointer to the returned
+ *                              symbol information. Always set. Free with
+ *                              RTDbgSymbolFree.
+ */
+RTDECL(int)         RTDbgModSymbolByAddrA(RTDBGMOD hDbgMod, RTDBGSEGIDX iSeg, RTUINTPTR off, uint32_t fFlags,
+                                          PRTINTPTR poffDisp, PRTDBGSYMBOL *ppSymInfo);
+
+/**
+ * Queries symbol information by symbol name.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_DBG_NO_SYMBOLS if there aren't any symbols.
+ * @retval  VERR_SYMBOL_NOT_FOUND if no suitable symbol was found.
+ * @retval  VERR_DBG_SYMBOL_NAME_OUT_OF_RANGE if the symbol name is too long or
+ *          short.
+ *
+ * @param   hDbgMod             The module handle.
+ * @param   pszSymbol           The symbol name.
+ * @param   pSymInfo            Where to store the symbol information.
+ */
+RTDECL(int)         RTDbgModSymbolByName(RTDBGMOD hDbgMod, const char *pszSymbol, PRTDBGSYMBOL pSymInfo);
+
+/**
+ * Queries symbol information by symbol name.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_DBG_NO_SYMBOLS if there aren't any symbols.
+ * @retval  VERR_SYMBOL_NOT_FOUND if no suitable symbol was found.
+ * @retval  VERR_DBG_SYMBOL_NAME_OUT_OF_RANGE if the symbol name is too long or
+ *          short.
+ * @retval  VERR_NO_MEMORY if RTDbgSymbolAlloc fails.
+ *
+ * @param   hDbgMod             The module handle.
+ * @param   pszSymbol           The symbol name.
+ * @param   ppSymInfo           Where to store the pointer to the returned
+ *                              symbol information. Always set. Free with
+ *                              RTDbgSymbolFree.
+ */
+RTDECL(int)         RTDbgModSymbolByNameA(RTDBGMOD hDbgMod, const char *pszSymbol, PRTDBGSYMBOL *ppSymInfo);
+
+/**
+ * Adds a line number to the module.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_NOT_SUPPORTED if the module interpret doesn't support adding
+ *          custom symbols. This should be consider a normal response.
+ * @retval  VERR_INVALID_HANDLE if hDbgMod is invalid.
+ * @retval  VERR_DBG_FILE_NAME_OUT_OF_RANGE if the file name is too longer or
+ *          empty.
+ * @retval  VERR_DBG_INVALID_RVA if an image relative address is specified and
+ *          it's not inside any of the segments defined by the module.
+ * @retval  VERR_DBG_INVALID_SEGMENT_INDEX if the segment index isn't valid.
+ * @retval  VERR_DBG_INVALID_SEGMENT_OFFSET if the segment offset is beyond the
+ *          end of the segment.
+ * @retval  VERR_INVALID_PARAMETER if the line number flags sets undefined bits.
+ *
+ * @param   hDbgMod             The module handle.
+ * @param   pszFile             The file name.
+ * @param   uLineNo             The line number.
+ * @param   iSeg                The segment index.
+ * @param   off                 The segment offset.
+ * @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.
+ */
+RTDECL(int)         RTDbgModLineAdd(RTDBGMOD hDbgMod, const char *pszFile, uint32_t uLineNo,
+                                    RTDBGSEGIDX iSeg, RTUINTPTR off, uint32_t *piOrdinal);
+
+/**
+ * Gets the line number count.
+ *
+ * This can be used together wtih RTDbgModLineByOrdinal or RTDbgModSymbolByLineA
+ * to enumerate all the line number information.
+ *
+ * @returns The number of line numbers in the module.
+ *          UINT32_MAX is returned if the module handle is invalid or some other
+ *          error occurs.
+ *
+ * @param   hDbgMod             The module handle.
+ */
+RTDECL(uint32_t)    RTDbgModLineCount(RTDBGMOD hDbgMod);
+
+/**
+ * Queries line number information by ordinal number.
+ *
+ * This can be used to enumerate the line numbers for the module. Use
+ * RTDbgModLineCount() to figure the end of the ordinals.
+ *
+ * @returns IPRT 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.
+ * @retval  VERR_INVALID_HANDLE if hDbgMod is invalid.
+
+ * @param   hDbgMod             The module handle.
+ * @param   iOrdinal            The line number ordinal number.
+ * @param   pLineInfo           Where to store the information about the line
+ *                              number.
+ */
+RTDECL(int)         RTDbgModLineByOrdinal(RTDBGMOD hDbgMod, uint32_t iOrdinal, PRTDBGLINE pLineInfo);
+
+/**
+ * Queries line number information by ordinal number.
+ *
+ * This can be used to enumerate the line numbers for the module. Use
+ * RTDbgModLineCount() to figure the end of the ordinals.
+ *
+ * @returns IPRT 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.
+ * @retval  VERR_INVALID_HANDLE if hDbgMod is invalid.
+ * @retval  VERR_NO_MEMORY if RTDbgLineAlloc fails.
+ *
+ * @param   hDbgMod             The module handle.
+ * @param   iOrdinal            The line number ordinal number.
+ * @param   ppLineInfo          Where to store the pointer to the returned line
+ *                              number information. Always set. Free with
+ *                              RTDbgLineFree.
+ */
+RTDECL(int)         RTDbgModLineByOrdinalA(RTDBGMOD hDbgMod, uint32_t iOrdinal, PRTDBGLINE *ppLineInfo);
+
+/**
+ * Queries line number information by address.
+ *
+ * The returned line number is what the debug info interpreter considers the
+ * one most applicable to the specified address. This usually means a line
+ * number with an address equal or lower than the requested.
+ *
+ * @returns IPRT 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.
+ * @retval  VERR_INVALID_HANDLE if hDbgMod is invalid.
+ * @retval  VERR_DBG_INVALID_RVA if an image relative address is specified and
+ *          it's not inside any of the segments defined by the module.
+ * @retval  VERR_DBG_INVALID_SEGMENT_INDEX if the segment index isn't valid.
+ * @retval  VERR_DBG_INVALID_SEGMENT_OFFSET if the segment offset is beyond the
+ *          end of the segment.
+ *
+ * @param   hDbgMod             The module handle.
+ * @param   iSeg                The segment number.
+ * @param   off                 The offset into the segment.
+ * @param   poffDisp            Where to store the distance between the
+ *                              specified address and the returned symbol.
+ *                              Optional.
+ * @param   pLineInfo           Where to store the line number information.
+ */
+RTDECL(int)         RTDbgModLineByAddr(RTDBGMOD hDbgMod, RTDBGSEGIDX iSeg, RTUINTPTR off, PRTINTPTR poffDisp, PRTDBGLINE pLineInfo);
+
+/**
+ * Queries line number information by address.
+ *
+ * The returned line number is what the debug info interpreter considers the
+ * one most applicable to the specified address. This usually means a line
+ * number with an address equal or lower than the requested.
+ *
+ * @returns IPRT 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.
+ * @retval  VERR_INVALID_HANDLE if hDbgMod is invalid.
+ * @retval  VERR_DBG_INVALID_RVA if an image relative address is specified and
+ *          it's not inside any of the segments defined by the module.
+ * @retval  VERR_DBG_INVALID_SEGMENT_INDEX if the segment index isn't valid.
+ * @retval  VERR_DBG_INVALID_SEGMENT_OFFSET if the segment offset is beyond the
+ *          end of the segment.
+ * @retval  VERR_NO_MEMORY if RTDbgLineAlloc fails.
+ *
+ * @param   hDbgMod             The module handle.
+ * @param   iSeg                The segment number.
+ * @param   off                 The offset into the segment.
+ * @param   poffDisp            Where to store the distance between the
+ *                              specified address and the returned symbol.
+ *                              Optional.
+ * @param   ppLineInfo          Where to store the pointer to the returned line
+ *                              number information. Always set. Free with
+ *                              RTDbgLineFree.
+ */
+RTDECL(int)         RTDbgModLineByAddrA(RTDBGMOD hDbgMod, RTDBGSEGIDX iSeg, RTUINTPTR off, PRTINTPTR poffDisp, PRTDBGLINE *ppLineInfo);
+
+/**
+ * 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   hDbgMod             The module handle.
+ * @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
+ */
+RTDECL(int)         RTDbgModUnwindFrame(RTDBGMOD hDbgMod, RTDBGSEGIDX iSeg, RTUINTPTR off, PRTDBGUNWINDSTATE pState);
+
+/** @} */
+# endif /* IN_RING3 */
+
+
+
+/** @name Kernel Debug Info API
+ *
+ * This is a specialized API for obtaining symbols and structure information
+ * about the running kernel.  It is relatively OS specific.  Its purpose and
+ * operation is doesn't map all that well onto RTDbgMod, so a few dedicated
+ * functions was created for it.
+ *
+ * @{ */
+
+/** Handle to the kernel debug info. */
+typedef struct RTDBGKRNLINFOINT *RTDBGKRNLINFO;
+/** Pointer to a kernel debug info handle. */
+typedef RTDBGKRNLINFO           *PRTDBGKRNLINFO;
+/** Nil kernel debug info handle. */
+#define NIL_RTDBGKRNLINFO       ((RTDBGKRNLINFO)0)
+
+/**
+ * Opens the kernel debug info.
+ *
+ * @returns IPRT status code.  Can fail for any number of reasons.
+ *
+ * @param   phKrnlInfo      Where to return the kernel debug info handle on
+ *                          success.
+ * @param   fFlags          Flags reserved for future use. Must be zero.
+ */
+RTR0DECL(int)       RTR0DbgKrnlInfoOpen(PRTDBGKRNLINFO phKrnlInfo, uint32_t fFlags);
+
+/**
+ * Retains a reference to the kernel debug info handle.
+ *
+ * @returns New reference count, UINT32_MAX on invalid handle (asserted).
+ * @param   hKrnlInfo       The kernel info handle.
+ */
+RTR0DECL(uint32_t)  RTR0DbgKrnlInfoRetain(RTDBGKRNLINFO hKrnlInfo);
+
+
+/**
+ * Releases a reference to the kernel debug info handle, destroying it when the
+ * counter reaches zero.
+ *
+ * @returns New reference count, UINT32_MAX on invalid handle (asserted).
+ * @param   hKrnlInfo       The kernel info handle. NIL_RTDBGKRNLINFO is
+ *                          quietly ignored.
+ */
+RTR0DECL(uint32_t)  RTR0DbgKrnlInfoRelease(RTDBGKRNLINFO hKrnlInfo);
+
+/**
+ * Queries the offset (in bytes) of a member of a kernel structure.
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS and offset at @a poffMember.
+ * @retval  VERR_NOT_FOUND if the structure or the member was not found.
+ * @retval  VERR_INVALID_HANDLE if hKrnlInfo is bad.
+ * @retval  VERR_INVALID_POINTER if any of the pointers are bad.
+ *
+ * @param   hKrnlInfo       The kernel info handle.
+ * @param   pszModule       The name of the module to search, pass NULL to
+ *                          search the default kernel module(s).
+ * @param   pszStructure    The structure name.
+ * @param   pszMember       The member name.
+ * @param   poffMember      Where to return the offset.
+ */
+RTR0DECL(int)       RTR0DbgKrnlInfoQueryMember(RTDBGKRNLINFO hKrnlInfo, const char *pszModule, const char *pszStructure,
+                                               const char *pszMember, size_t *poffMember);
+
+
+/**
+ * Queries the value (usually the address) of a kernel symbol.
+ *
+ * This may go looking for the symbol in other modules, in which case it will
+ * always check the kernel symbol table first.
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS and value at @a ppvSymbol.
+ * @retval  VERR_SYMBOL_NOT_FOUND
+ * @retval  VERR_INVALID_HANDLE if hKrnlInfo is bad.
+ * @retval  VERR_INVALID_POINTER if any of the pointers are bad.
+ *
+ * @param   hKrnlInfo       The kernel info handle.
+ * @param   pszModule       The name of the module to search, pass NULL to
+ *                          search the default kernel module(s).
+ * @param   pszSymbol       The C name of the symbol.
+ *                          On Windows NT there are the following special symbols:
+ *                              - __ImageBase: The base address of the module.
+ *                              - __ImageSize: The size of the module.
+ *                              - __ImageNtHdrs: Address of the NT headers.
+ * @param   ppvSymbol       Where to return the symbol value, passing NULL is
+ *                          OK. This may be modified even on failure, in
+ *                          particular, it will be set to NULL when
+ *                          VERR_SYMBOL_NOT_FOUND is returned.
+ *
+ * @sa      RTR0DbgKrnlInfoGetSymbol, RTLdrGetSymbol
+ */
+RTR0DECL(int)       RTR0DbgKrnlInfoQuerySymbol(RTDBGKRNLINFO hKrnlInfo, const char *pszModule,
+                                               const char *pszSymbol, void **ppvSymbol);
+
+/**
+ * Wrapper around RTR0DbgKrnlInfoQuerySymbol that returns the symbol.
+ *
+ * @return  Symbol address if found, NULL if not found or some invalid parameter
+ *          or something.
+ * @param   hKrnlInfo       The kernel info handle.
+ * @param   pszModule       The name of the module to search, pass NULL to
+ *                          search the default kernel module(s).
+ * @param   pszSymbol       The C name of the symbol.
+ *                          On Windows NT there are the following special symbols:
+ *                              - __ImageBase: The base address of the module.
+ *                              - __ImageSize: The size of the module.
+ *                              - __ImageNtHdrs: Address of the NT headers.
+ * @sa      RTR0DbgKrnlInfoQuerySymbol, RTLdrGetSymbol
+ */
+RTR0DECL(void *)    RTR0DbgKrnlInfoGetSymbol(RTDBGKRNLINFO hKrnlInfo, const char *pszModule, const char *pszSymbol);
+
+/**
+ * Queries the size (in bytes) of a kernel data type.
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS and size at @a pcbType.
+ * @retval  VERR_NOT_FOUND if the type was not found.
+ * @retval  VERR_INVALID_HANDLE if hKrnlInfo is bad.
+ * @retval  VERR_INVALID_POINTER if any of the pointers are bad.
+ * @retval  VERR_WRONG_TYPE if the type was not a valid data type (e.g. a
+ *          function)
+ *
+ * @param   hKrnlInfo       The kernel info handle.
+ * @param   pszModule       The name of the module to search, pass NULL to
+ *                          search the default kernel module(s).
+ * @param   pszType         The type name.
+ * @param   pcbType         Where to return the size of the type.
+ */
+RTR0DECL(int)       RTR0DbgKrnlInfoQuerySize(RTDBGKRNLINFO hKrnlInfo, const char *pszModule,
+                                             const char *pszType, size_t *pcbType);
+/** @} */
+
+/** @} */
+
+RT_C_DECLS_END
+
+#endif /* !IPRT_INCLUDED_dbg_h */
+