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/* $Id: kDbgSpace.cpp 29 2009-07-01 20:30:29Z bird $ */
/** @file
* kDbg - The Debug Info Reader, Address Space Manager.
*/
/*
* Copyright (c) 2006-2007 Knut St. Osmundsen <bird-kStuff-spamix@anduin.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include "kDbgInternal.h"
#include <k/kHlpAlloc.h>
#include <k/kHlpString.h>
#include <k/kAvl.h>
/*******************************************************************************
* Structures and Typedefs *
*******************************************************************************/
/** Pointer to a name space module. */
typedef struct KDBGSPACEMOD *PKDBGSPACEMOD;
/**
* Tracks a module segment in the address space.
*
* These segments are organized in two trees, by address in the
* KDBGSPACE::pSegRoot tree and by selector value in the
* KDBGSPACE::pSegSelRoot tree.
*
* While the debug module reader could easily provide us with
* segment names and it could perhaps be interesting to lookup
* a segment by its name in some situations, this has been
* considered too much bother for now. :-)
*/
typedef struct KDBGSPACESEG
{
/** The module segment index. */
KI32 iSegment;
/** The address space module structure this segment belongs to. */
PKDBGSPACEMOD pSpaceMod;
} KDBGSPACESEG;
typedef KDBGSPACESEG *PKDBGSPACESEG;
/**
* Track a module in the name space.
*
* Each module in the address space can be addressed efficiently
* by module name. The module name has to be unique.
*/
typedef struct KDBGSPACEMOD
{
/** The module name hash. */
KU32 u32Hash;
/** The length of the module name. */
KU32 cchName;
/** The module name. */
char *pszName;
/** The next module in the same bucket. */
PKDBGSPACEMOD pNext;
/** Pointer to the debug module reader. */
PKDBGMOD pMod;
/** The number of segments. */
KU32 cSegs;
/** The segment array. (variable length) */
KDBGSPACESEG aSegs[1];
} KDBGSPACEMOD;
typedef struct KDBGCACHEDSYM *PKDBGCACHEDSYM;
/**
* A cached symbol.
*/
typedef struct KDBGCACHEDSYM
{
/** The symbol name hash. */
KU32 u32Hash;
/** The next symbol in the same bucket. */
PKDBGCACHEDSYM pNext;
/** The next symbol belonging to the same module as this. */
PKDBGCACHEDSYM pNextMod;
/** The cached symbol information. */
KDBGSYMBOL Sym;
} KDBGCACHEDSYM;
/**
* A symbol cache.
*/
typedef struct KDBGSYMCACHE
{
/** The symbol cache magic. (KDBGSYMCACHE_MAGIC) */
KU32 u32Magic;
/** The maximum number of symbols.*/
KU32 cMax;
/** The current number of symbols.*/
KU32 cCur;
/** The number of hash buckets. */
KU32 cBuckets;
/** The address lookup tree. */
PKDBGADDRAVL pAddrTree;
/** Array of hash buckets.
* The size is selected according to the cache size. */
PKDBGCACHEDSYM *paBuckets[1];
} KDBGSYMCACHE;
typedef KDBGSYMCACHE *PKDBGSYMCACHE;
/**
* A user symbol record.
*
* The user symbols are organized in the KDBGSPACE::pUserRoot tree
* and form an overlay that overrides the debug info retrieved from
* the KDBGSPACE::pSegRoot tree.
*
* In the current implementation the user symbols are unique and
* one would have to first delete a symbol in order to add another
* at the same address. This may be changed later, perhaps.
*/
typedef struct KDBGSPACEUSERSYM
{
} KDBGSPACEUSERSYM;
typedef KDBGSPACEUSERSYM *PKDBGSPACEUSERSYM;
/**
* Address space.
*/
typedef struct KDBGSPACE
{
/** The addresspace magic. (KDBGSPACE_MAGIC) */
KU32 u32Magic;
/** User defined address space identifier or data pointer. */
KUPTR uUser;
/** The name of the address space. (Optional) */
const char *pszName;
} KDBGSPACE;
/** Pointer to an address space. */
typedef struct KDBGSPACE *PKDBGSPACE;
/** Pointer to an address space pointer. */
typedef PKDBGSPACE *PPKDBGSPACE;
KDBG_DECL(int) kDbgSpaceCreate(PPDBGSPACE ppSpace, KDBGADDR LowAddr, DBGADDR HighAddr,
KUPTR uUser, const char *pszName)
{
/*
* Validate input.
*/
kDbgAssertPtrReturn(ppSpace);
*ppSpace = NULL;
kDbgAssertPtrNullReturn(pszName);
kDbgAssertReturn(LowAddr < HighAddr);
/*
* Create and initialize the address space.
*/
PKDBGSPACE pSpace = (PKDBGSPACE)kHlpAlloc(sizeof(*pSpace));
if (!pSpace)
return KERR_NO_MEMORY;
pSpace->u32Magic = KDBGSPACE_MAGIC;
pSpace->uUser = uUser;
pSpace->pszName = pszName;
}
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