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/* Copyright (C) 2007-2010 The Android Open Source Project
**
** This software is licensed under the terms of the GNU General Public
** License version 2, as published by the Free Software Foundation, and
** may be copied, distributed, and modified under those terms.
**
** 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.
*/
/*
* Contains declarations of structures and routines that implement a red-black
* tree (a map) of module memory mapping ranges in the guest system. The map is
* organized in such a way, that each entry in the map describes a virtual
* address range that belongs to a mapped execution module in the guest system.
* Map considers two ranges to be equal if their address ranges intersect in
* any part.
*/
#ifndef QEMU_MEMCHECK_MEMCHECK_MMRANGE_MAP_H
#define QEMU_MEMCHECK_MEMCHECK_MMRANGE_MAP_H
#include "sys-tree.h"
#include "memcheck_common.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Memory mapping range map. */
typedef struct MMRangeMap {
/* Head of the map. */
struct MMRangeMapEntry* rbh_root;
} MMRangeMap;
// =============================================================================
// Map API
// =============================================================================
/* Initializes the map.
* Param:
* map - Map to initialize.
*/
void mmrangemap_init(MMRangeMap* map);
/* Inserts new (or replaces existing) entry in the map.
* Insertion, or replacement is controlled by the value, passed to this routine
* with 'replaced' parameter. If this parameter is NULL, insertion will fail if
* a matching entry already exists in the map. If 'replaced' parameter is not
* NULL, and a matching entry exists in the map, content of the existing entry
* will be copied to the descriptor, addressed by 'replace' parameter, existing
* entry will be removed from the map, and new entry will be inserted.
* Param:
* map - Map where to insert new, or replace existing entry.
* desc - Descriptor to insert to the map.
* replaced - If not NULL, upon return from this routine contains descriptor
* that has been replaced in the map with the new entry. Note that if this
* routine returns with value other than RBT_MAP_RESULT_ENTRY_REPLACED,
* content of the 'replaced' buffer is not defined, as no replacement has
* actually occurred.
* Return
* See RBTMapResult for the return codes.
*/
RBTMapResult mmrangemap_insert(MMRangeMap* map,
const MMRangeDesc* desc,
MMRangeDesc* replaced);
/* Finds an entry in the map that matches the given address.
* Param:
* map - Map where to search for an entry.
* start - Starting address of a mapping range.
* end - Ending address of a mapping range.
* Return:
* Pointer to the descriptor found in a map entry, or NULL if no matching
* entry has been found in the map.
*/
MMRangeDesc* mmrangemap_find(const MMRangeMap* map,
target_ulong start,
target_ulong end);
/* Pulls (finds and removes) an entry from the map that matches the given
* address.
* Param:
* map - Map where to search for an entry.
* start - Starting address of a mapping range.
* end - Ending address of a mapping range.
* pulled - Upon successful return contains descriptor data pulled from the
* map.
* Return:
* Zero if a descriptor that matches the given address has been pulled, or 1
* if no matching entry has been found in the map.
*/
int mmrangemap_pull(MMRangeMap* map,
target_ulong start,
target_ulong end,
MMRangeDesc* pulled);
/* Copies content of one memory map to another.
* Param:
* to - Map where to copy entries to.
* from - Map where to copy entries from.
* Return:
* Zero on success, or -1 on error.
*/
int mmrangemap_copy(MMRangeMap* to, const MMRangeMap* from);
/* Empties the map.
* Param:
* map - Map to empty.
* Return:
* Number of entries removed from the map.
*/
int mmrangemap_empty(MMRangeMap* map);
#ifdef __cplusplus
}; /* end of extern "C" */
#endif
#endif // QEMU_MEMCHECK_MEMCHECK_MMRANGE_MAP_H
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