/
io_bank.c
937 lines (898 loc) · 30.2 KB
/
io_bank.c
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/* radare2 - LGPL - Copyright 2021 - condret */
#include <r_io.h>
#include <r_util.h>
R_API RIOBank *r_io_bank_new(const char *name) {
r_return_val_if_fail (name, NULL);
RIOBank *bank = R_NEW0 (RIOBank);
if (!bank) {
return NULL;
}
bank->name = strdup (name);
bank->submaps = r_crbtree_new (free);
if (!bank->submaps) {
free (bank);
return NULL;
}
bank->maprefs = r_list_newf (free);
if (!bank->maprefs) {
r_crbtree_free (bank->submaps);
free (bank);
return NULL;
}
bank->todo = r_queue_new (8);
if (!bank->todo) {
r_list_free (bank->maprefs);
r_crbtree_free (bank->submaps);
free (bank);
return NULL;
}
return bank;
}
R_API void r_io_bank_clear(RIOBank *bank) {
r_return_if_fail (bank);
while (!r_queue_is_empty (bank->todo)) {
free (r_queue_dequeue (bank->todo));
}
bank->last_used = NULL;
r_crbtree_clear (bank->submaps);
r_list_purge (bank->maprefs);
}
R_API void r_io_bank_free(RIOBank *bank) {
if (bank) {
r_queue_free (bank->todo);
r_list_free (bank->maprefs);
r_crbtree_free (bank->submaps);
free (bank->name);
free (bank);
}
}
R_API void r_io_bank_init(RIO *io) {
r_return_if_fail (io);
r_io_bank_fini (io);
io->banks = r_id_storage_new (0, UT32_MAX);
}
static bool _bank_free_cb(void *user, void *data, ut32 id) {
r_io_bank_free ((RIOBank *)data);
return true;
}
R_API void r_io_bank_fini(RIO *io) {
r_return_if_fail (io);
if (io->banks) {
r_id_storage_foreach (io->banks, _bank_free_cb, NULL);
r_id_storage_free (io->banks);
io->banks = NULL;
}
}
R_API RIOBank *r_io_bank_get(RIO *io, const ut32 bankid) {
r_return_val_if_fail (io && io->banks, NULL);
return (RIOBank *)r_id_storage_get (io->banks, bankid);
}
R_API ut32 r_io_bank_first(RIO *io) {
ut32 bankid = -1;
r_id_storage_get_lowest (io->banks, &bankid);
return bankid;
}
R_API bool r_io_bank_use(RIO *io, ut32 bankid) {
RIOBank *bank = r_io_bank_get (io, bankid);
if (bank) {
io->bank = bankid;
return true;
}
return false;
}
R_API bool r_io_bank_add(RIO *io, RIOBank *bank) {
r_return_val_if_fail (io && io->banks && bank, false);
return r_id_storage_add (io->banks, bank, &bank->id);
}
static RIOMapRef *_mapref_from_map(RIOMap *map) {
RIOMapRef *mapref = R_NEW (RIOMapRef);
if (mapref) {
mapref->id = map->id;
mapref->ts = map->ts;
}
return mapref;
}
// incoming - in
// cb for finding sm by lower boundary vaddr
static int _find_sm_by_from_vaddr_cb(void *incoming, void *in, void *user) {
RIOSubMap *bd = (RIOSubMap *)incoming, *sm = (RIOSubMap *)in;
if (r_io_submap_from (bd) < r_io_submap_from (sm)) {
return -1;
}
if (r_io_submap_from (bd) > r_io_submap_from (sm)) {
return 1;
}
return 0;
}
static int _find_sm_by_vaddr_cb(void *incoming, void *in, void *user) {
const ut64 addr = ((ut64 *)incoming)[0];
RIOSubMap *sm = (RIOSubMap *)in;
if (r_io_submap_contain (sm, addr)) {
return 0;
}
if (addr < r_io_submap_from (sm)) {
return -1;
}
return 1;
}
static int _find_lowest_intersection_sm_cb(void *incoming, void *in, void *user) {
RIOSubMap *bd = (RIOSubMap *)incoming, *sm = (RIOSubMap *)in;
if (r_io_submap_overlap (bd, sm)) {
return 0;
}
if (r_io_submap_from (bd) < r_io_submap_from (sm)) {
return -1;
}
return 1;
}
// returns the node containing the submap with lowest itv.addr, that intersects with sm
static RRBNode *_find_entry_submap_node(RIOBank *bank, RIOSubMap *sm) {
RRBNode *node = r_crbtree_find_node (bank->submaps, sm, _find_lowest_intersection_sm_cb, NULL);
if (!node) {
return NULL;
}
RRBNode *prev = r_rbnode_prev (node);
while (prev && r_io_submap_overlap (((RIOSubMap *)prev->data), sm)) {
node = prev;
prev = r_rbnode_prev (node);
}
return node;
}
R_API bool r_io_bank_map_add_top(RIO *io, const ut32 bankid, const ut32 mapid) {
RIOBank *bank = r_io_bank_get (io, bankid);
RIOMap *map = r_io_map_get (io, mapid);
r_return_val_if_fail (io && bank && map, false);
RIOMapRef *mapref = _mapref_from_map (map);
if (!mapref) {
return false;
}
RIOSubMap *sm = r_io_submap_new (io, mapref);
if (!sm) {
free (mapref);
return false;
}
RRBNode *entry = _find_entry_submap_node (bank, sm);
if (!entry) {
// no intersection with any submap, so just insert
if (!r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL)) {
free (sm);
free (mapref);
return false;
}
r_list_append (bank->maprefs, mapref);
return true;
}
bank->last_used = NULL;
RIOSubMap *bd = (RIOSubMap *)entry->data;
if (r_io_submap_to (bd) == r_io_submap_to (sm) &&
r_io_submap_from (bd) >= r_io_submap_from (sm)) {
// _find_entry_submap_node guarantees, that there is no submap
// prior to bd in the range of sm, so instead of deleting and inserting
// we can just memcpy
memcpy (bd, sm, sizeof (RIOSubMap));
free (sm);
r_list_append (bank->maprefs, mapref);
return true;
}
if (r_io_submap_from (bd) < r_io_submap_from (sm) &&
r_io_submap_to (sm) < r_io_submap_to (bd)) {
// split bd into 2 maps => bd and bdsm
RIOSubMap *bdsm = R_NEWCOPY (RIOSubMap, bd);
if (!bdsm) {
free (sm);
free (mapref);
return false;
}
r_io_submap_set_from (bdsm, r_io_submap_to (sm) + 1);
r_io_submap_set_to (bd, r_io_submap_from (sm) - 1);
// TODO: insert and check return value, before adjusting sm size
if (!r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL)) {
free (sm);
free (bdsm);
free (mapref);
return false;
}
if (!r_crbtree_insert (bank->submaps, bdsm, _find_sm_by_from_vaddr_cb, NULL)) {
r_crbtree_delete (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL);
free (sm);
free (bdsm);
free (mapref);
return false;
}
r_list_append (bank->maprefs, mapref);
return true;
}
// guaranteed intersection
if (r_io_submap_from (bd) < r_io_submap_from (sm)) {
r_io_submap_set_to (bd, r_io_submap_from (sm) - 1);
entry = r_rbnode_next (entry);
}
while (entry && r_io_submap_to (((RIOSubMap *)entry->data)) <= r_io_submap_to (sm)) {
//delete all submaps that are completly included in sm
RRBNode *next = r_rbnode_next (entry);
// this can be optimized, there is no need to do search here
bool a = r_crbtree_delete (bank->submaps, entry->data, _find_sm_by_from_vaddr_cb, NULL);
if (!a) {
break;
}
entry = next;
}
if (entry && r_io_submap_from (((RIOSubMap *)entry->data)) <= r_io_submap_to (sm)) {
bd = (RIOSubMap *)entry->data;
r_io_submap_set_from (bd, r_io_submap_to (sm) + 1);
}
if (!r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL)) {
free (sm);
free (mapref);
return false;
}
r_list_append (bank->maprefs, mapref);
return true;
}
R_API bool r_io_bank_map_add_bottom(RIO *io, const ut32 bankid, const ut32 mapid) {
RIOBank *bank = r_io_bank_get (io, bankid);
RIOMap *map = r_io_map_get (io, mapid);
r_return_val_if_fail (io && bank && map, false);
RIOMapRef *mapref = _mapref_from_map (map);
if (!mapref) {
return false;
}
RIOSubMap *sm = r_io_submap_new (io, mapref);
if (!sm) {
free (mapref);
return false;
}
RRBNode *entry = _find_entry_submap_node (bank, sm);
if (!entry) {
// no intersection with any submap, so just insert
if (!r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL)) {
free (sm);
free (mapref);
return false;
}
r_list_prepend (bank->maprefs, mapref);
return true;
}
while (entry && r_io_submap_from (((RIOSubMap *)entry->data)) <= r_io_submap_to (sm)) {
RIOSubMap *bd = (RIOSubMap *)entry->data;
if (r_io_submap_from (sm) < r_io_submap_from (bd)) {
RIOSubMap *bdsm = R_NEWCOPY (RIOSubMap, sm);
r_io_submap_set_to (bdsm, r_io_submap_from (bd) - 1);
r_crbtree_insert (bank->submaps, bdsm, _find_sm_by_from_vaddr_cb, NULL);
}
if (r_io_submap_to (sm) <= r_io_submap_to (bd)) {
r_list_prepend (bank->maprefs, mapref);
free (sm);
return true;
}
r_io_submap_set_from (sm, r_io_submap_to (bd) + 1);
entry = r_rbnode_next (entry);
}
r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL);
r_list_prepend (bank->maprefs, mapref);
return true;
}
R_API bool r_io_bank_map_priorize(RIO *io, const ut32 bankid, const ut32 mapid) {
RIOBank *bank = r_io_bank_get (io, bankid);
r_return_val_if_fail (io && bank, false);
RListIter *iter;
RIOMapRef *mapref;
r_list_foreach (bank->maprefs, iter, mapref) {
if (mapref->id == mapid) {
goto found;
}
}
return false;
found:
if (iter == bank->maprefs->tail) { //tail is top
return r_io_map_get_by_ref (io, mapref) ? true : false;
}
RIOSubMap *sm = r_io_submap_new (io, mapref);
if (!sm) {
return false;
}
RRBNode *entry = _find_entry_submap_node (bank, sm);
if (!entry) {
// if this happens, something is really fucked up
free (sm);
return false;
}
bank->last_used = NULL;
RIOSubMap *bd = (RIOSubMap *)entry->data;
if (r_itv_eq (bd->itv, sm->itv)) {
// no need to insert new sm, if boundaries match perfectly
// instead override mapref of existing node/submap
bd->mapref = *mapref;
free (sm);
r_list_iter_to_top (bank->maprefs, iter);
return true;
}
if (r_io_submap_from (bd) < r_io_submap_from (sm) &&
r_io_submap_to (sm) < r_io_submap_to (bd)) {
// bd completly overlaps sm on both ends,
// therefor split bd into 2 maps => bd and bdsm
// |---bd---||--sm--|-bdsm-|
RIOSubMap *bdsm = R_NEWCOPY (RIOSubMap, bd);
if (!bdsm) {
free (sm);
return false;
}
r_io_submap_set_from (bdsm, r_io_submap_to (sm) + 1);
r_io_submap_set_to (bd, r_io_submap_from (sm) - 1);
// TODO: insert and check return value, before adjusting sm size
r_list_iter_to_top (bank->maprefs, iter);
return r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL) &
r_crbtree_insert (bank->submaps, bdsm, _find_sm_by_from_vaddr_cb, NULL);
}
if (r_io_submap_from (bd) < r_io_submap_from (sm)) {
r_io_submap_set_to (bd, r_io_submap_from (sm) - 1);
entry = r_rbnode_next (entry);
}
while (entry && r_io_submap_to (((RIOSubMap *)entry->data)) <= r_io_submap_to (sm)) {
RRBNode *next = r_rbnode_next (entry);
//delete all submaps that are completly included in sm
// this can be optimized, there is no need to do search here
r_crbtree_delete (bank->submaps, entry->data, _find_sm_by_from_vaddr_cb, NULL);
entry = next;
}
if (entry && r_io_submap_from (((RIOSubMap *)entry->data)) <= r_io_submap_to (sm)) {
bd = (RIOSubMap *)entry->data;
r_io_submap_set_from (bd, r_io_submap_to (sm) + 1);
}
r_list_iter_to_top (bank->maprefs, iter);
return r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL);
}
// deletes submaps that belong to a mapref with a specified priority from the submap tree of a bank.
// the mapref is accessed by it's iter from the priority list in the bank,
// so that the function can insert new submaps that fill the gaps. The iter represents the priority of the mapref.
// this function DOES NOT delete the iter from the list. (that way it can be used for delete and relocate)
static void _delete_submaps_from_bank_tree(RIO *io, RIOBank *bank, RListIter *prio, RIOMap *map) {
RIOSubMap fake_sm;
fake_sm.itv = map->itv;
fake_sm.mapref.id = map->id;
RRBNode *entry = _find_entry_submap_node (bank, &fake_sm);
if (!entry) {
return;
}
RIOSubMap *bd = (RIOSubMap *)entry->data;
while (bd && r_io_submap_overlap (bd, (&fake_sm))) {
// this loop deletes all affected submaps from the rbtree
// and also enqueues them in bank->todo
RRBNode *next = r_rbnode_next (entry);
if (bd->mapref.id == fake_sm.mapref.id) {
r_queue_enqueue (bank->todo, R_NEWCOPY (RIOSubMap, bd));
r_crbtree_delete (bank->submaps, bd, _find_sm_by_from_vaddr_cb, NULL);
}
entry = next;
bd = entry ? (RIOSubMap *)entry->data : NULL;
}
RListIter *iter = prio;
while (!r_queue_is_empty (bank->todo)) {
// now check for each deleted submap if a lower map intersects with it
// and create new submaps accordingly, and fill the gaps
RIOSubMap *sm = r_queue_dequeue (bank->todo);
RListIter *ator = r_list_iter_get_prev (iter);
while (ator) {
map = r_io_map_get_by_ref (io, (RIOMapRef *)ator->data);
ator = r_list_iter_get_prev (ator);
if (!map) {
// if this happens, something is fucked up, and no submap should be inserted
continue;
}
// if the map and sm intersect, the intersecting submap needs to be inserted in the tree
// there are 5 cases to consider here
// 1. no intersection: just continue to the next iteration
// 2. map overlaps sm on both ends: insert submap for map with boundaries of sm
// 3. map overlaps sm on the upper end: insert submap for map accordingly and adjust sm boundaries
// 4. map overlaps sm on the lower end: insert submap for map accordingly and adjust sm boundaries
// 5. sm overlaps sm on both ends: split sm into 2 submaps and enqueue new one in banks->todo; insert submap for map; adjust sm boundaries
if (r_io_submap_to (sm) < r_io_map_from (map) || r_io_submap_from (sm) > r_io_map_to (map)) {
// case 1
continue;
}
RIOMapRef *mapref = _mapref_from_map (map);
bd = r_io_submap_new (io, mapref);
free (mapref);
if (!bd) {
continue;
}
if (r_io_submap_from (sm) >= r_io_map_from (map)) {
// case 4 and 2
r_io_submap_set_from (bd, r_io_submap_from (sm));
r_crbtree_insert (bank->submaps, bd, _find_sm_by_from_vaddr_cb, NULL);
if (r_io_submap_to (sm) <= r_io_map_to (map)) {
// case 2
r_io_submap_set_to (bd, r_io_submap_to (sm));
break;
}
// case 4
r_io_submap_set_from (sm, r_io_submap_to (bd) + 1);
continue;
}
if (r_io_submap_to (sm) <= r_io_map_to (map)) {
// case 3
// adjust bd upper boundary to avoid overlap with existing submaps
r_io_submap_set_to (bd, r_io_submap_to (sm));
// adjust sm upper boundary to avoid hitting again on sm in further iterations
r_io_submap_set_to (sm, r_io_submap_from (bd) - 1);
r_crbtree_insert (bank->submaps, bd, _find_sm_by_from_vaddr_cb, NULL);
continue;
}
// case 5 because all other cases are already handled
RIOSubMap *bdsm = R_NEWCOPY (RIOSubMap, sm);
r_io_submap_set_to (sm, r_io_submap_from (bd) - 1);
r_io_submap_set_from (bdsm, r_io_submap_to (bd) + 1);
r_crbtree_insert (bank->submaps, bd, _find_sm_by_from_vaddr_cb, NULL);
r_queue_enqueue (bank->todo, bdsm);
}
free (sm);
}
}
R_API bool r_io_bank_map_depriorize(RIO *io, const ut32 bankid, const ut32 mapid) {
RIOBank *bank = r_io_bank_get (io, bankid);
RIOMap *map = r_io_map_get (io, mapid);
r_return_val_if_fail (bank && map, false);
RListIter *iter;
RIOMapRef *mapref = NULL;
r_list_foreach (bank->maprefs, iter, mapref) {
if (mapref->id == mapid) {
goto found;
}
}
// map is not referenced by this bank
return false;
found:
if (iter == bank->maprefs->head) {
// map is already lowest priority
return true;
}
bank->last_used = NULL;
_delete_submaps_from_bank_tree (io, bank, iter, map);
r_list_delete (bank->maprefs, iter);
return r_io_bank_map_add_bottom (io, bankid, mapid);
}
// compared 2 maprefs of the same bank by their priority (position in the mapref list)
// returns 0, if both have the same priority
// returns 1, if mr0 has higher priority than mr1
// returns -1, if mr1 has higher priority tham mr0
// returns 0, if neither mr0 nor mr1 are an element of the bank
static int _mapref_priority_cmp(RIOBank *bank, RIOMapRef *mr0, RIOMapRef *mr1) {
if (mr0->id == mr1->id) {
// mapref have the same priority, if their mapid matches
return 0;
}
RListIter *iter;
RIOMapRef *mapref;
r_list_foreach_prev (bank->maprefs, iter, mapref) {
if (mapref->id == mr0->id) {
return 1;
}
if (mapref->id == mr1->id) {
return -1;
}
}
return 0; // should never happen
}
R_API bool r_io_bank_update_map_boundaries(RIO *io, const ut32 bankid, const ut32 mapid, ut64 ofrom, ut64 oto) {
RIOBank *bank = r_io_bank_get (io, bankid);
r_return_val_if_fail (io && bank, false);
RListIter *iter;
RIOMapRef *mapref;
r_list_foreach_prev (bank->maprefs, iter, mapref) {
if (mapref->id == mapid) {
goto found;
}
}
// map is not referenced by this map
return false;
found:
;RIOMap *map = r_io_map_get_by_ref (io, mapref);
if (!map) {
// inconsistent mapref
// mapref should be deleted from bank here
return false;
}
if (r_io_map_from (map) == ofrom && r_io_map_to (map) == oto) {
// nothing todo here
return true;
}
// allocate sm here to avoid deleting things without ensuring
// that this code could at least insert 1 submap
RIOSubMap *sm = r_io_submap_new (io, mapref);
if (!sm) {
return false;
}
bank->last_used = NULL;
// this problem can be divided in 2 steps:
// 1. delete corresponding submaps and insert intersecting submaps with lower priority
// 2. adjust addr and insert submaps at new addr respecting priority
RIOMap fake_map;
memcpy (&fake_map, map, sizeof (RIOMap));
fake_map.itv.addr = ofrom;
fake_map.itv.size = oto - ofrom + 1;
_delete_submaps_from_bank_tree (io, bank, iter, &fake_map);
RRBNode *entry = _find_entry_submap_node (bank, sm);
if (!entry) {
// no intersection here, so just insert sm into the tree and we're done
r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL);
// assumption here is that there is no need to check for return value of r_crbtree_insert,
// since it only fails, if allocation fails and a delete was performed before, so it should just be fine
return true;
}
RIOSubMap *bd = (RIOSubMap *)entry->data;
// check if sm has higher priority than bd by comparing their maprefs
if (_mapref_priority_cmp (bank, &sm->mapref, &bd->mapref) == 1) {
// sm has higher priority that bd => adjust bd
if (r_io_submap_to (bd) == r_io_submap_to (sm)) {
if (r_io_submap_from (bd) >= r_io_submap_from (sm)) {
// bc of _find_entry_submap_node, we can be sure, that there is no
// lower submap that intersects with sm
//
// instead of deleting and inserting, just replace the mapref,
// similar to r_io_bank_map_priorize
memcpy (bd, sm, sizeof (RIOSubMap));
free (sm);
} else {
r_io_submap_set_to (bd, r_io_submap_from (sm) - 1);
r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL);
}
return true;
}
if (r_io_submap_from (bd) < r_io_submap_from (sm) &&
r_io_submap_to (sm) < r_io_submap_to (bd)) {
RIOSubMap *bdsm = R_NEWCOPY (RIOSubMap, bd);
// allocating bdsm here is fine, bc bd is already in the tree
r_io_submap_set_from (bdsm, r_io_submap_to (sm) + 1);
r_io_submap_set_to (bd, r_io_submap_from (sm) - 1);
// What do if this fails?
r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL);
r_crbtree_insert (bank->submaps, bdsm, _find_sm_by_from_vaddr_cb, NULL);
return true;
}
if (r_io_submap_from (bd) < r_io_submap_from (sm)) {
r_io_submap_set_to (bd, r_io_submap_from (sm) - 1);
entry = r_rbnode_next (entry);
}
} else {
// _mapref_priority_cmp cannot return 0 in this scenario,
// since all submaps with the same mapref as sm were deleted from
// the submap tree previously. so _mapref_priority_cmp can only return 1 or -1
// bd has higher priority than sm => adjust sm
if (r_io_submap_from (bd) <= r_io_submap_from (sm)) {
if (r_io_submap_to (sm) <= r_io_submap_to (bd)) {
// bd completly overlaps sm => nothing to do
free (sm);
return true;
} // else
// adjust sm
// r_io_submap_set_from (sm, r_io_submap_to (bd) + 1);
} else {
if (r_io_submap_to (sm) <= r_io_submap_to (bd)) {
r_io_submap_set_to (sm, r_io_submap_from (bd) - 1);
if (!r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL)) {
free (sm);
return false;
}
return true;
}
RIOSubMap *bdsm = R_NEWCOPY (RIOSubMap, sm);
if (!bdsm) {
free (sm);
return false;
}
r_io_submap_set_to (bdsm, r_io_submap_from (bd) - 1);
// r_io_submap_set_from (sm, r_io_submap_to (bd) + 1);
if (!r_crbtree_insert (bank->submaps, bdsm, _find_sm_by_from_vaddr_cb, NULL)) {
free (bdsm);
free (sm);
return false;
}
// r_io_submap_set_from (sm, r_io_submap_to (bd) + 1);
entry = r_rbnode_next (entry);
}
r_io_submap_set_from (sm, r_io_submap_to (bd) + 1);
}
// entry = r_rbnode_next (entry);
// it is given that entry->data->from >= sm->from on every iteration
// so only check for upper boundary of sm for intersection with entry->data
while (entry && r_io_submap_to (((RIOSubMap *)entry->data)) <= r_io_submap_to (sm)) {
// iterate forwards starting at entry, while entry->data and sm overlap
bd = (RIOSubMap *)entry->data;
entry = r_rbnode_next (entry);
// check if sm has higher priority than bd by comparing their maprefs
if (_mapref_priority_cmp (bank, &sm->mapref, &bd->mapref) == 1) {
// delete bd
r_crbtree_delete (bank->submaps, bd, _find_sm_by_from_vaddr_cb, NULL);
} else {
// _mapref_priority_cmp cannot return 0 in this scenario,
// since all submaps with the same mapref as sm were deleted from
// the submap tree previously. so _mapref_priority_cmp can only return 1 or -1
// bd has higher priority than sm => adjust sm
if (r_io_submap_from (bd) > r_io_submap_from (sm)) {
RIOSubMap *bdsm = R_NEWCOPY (RIOSubMap, sm);
r_io_submap_set_to (bdsm, r_io_submap_from (bd) - 1);
r_crbtree_insert (bank->submaps, bdsm, _find_sm_by_from_vaddr_cb, NULL);
}
if (r_io_submap_to (bd) == r_io_submap_to (sm)) {
// in this case the size of sm would be 0,
// but since empty maps are not allowed free sm and return
free (sm);
return true;
}
r_io_submap_set_from (sm, r_io_submap_to (bd) + 1);
}
}
if (!entry) {
return r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL);
}
bd = (RIOSubMap *)entry->data;
if (_mapref_priority_cmp (bank, &sm->mapref, &bd->mapref) == 1) {
if (r_io_submap_from (bd) <= r_io_submap_to (sm)) {
r_io_submap_set_from (bd, r_io_submap_to (sm) + 1);
}
r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL);
} else {
if (r_io_submap_from (sm) < r_io_submap_from (bd)) {
if (r_io_submap_from (bd) <= r_io_submap_to (sm)) {
r_io_submap_set_to (sm, r_io_submap_from (bd) - 1);
}
r_crbtree_insert (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL);
} else {
// can this happen?
free (sm);
}
}
return true;
}
// locates next available address for a map with given size and alignment starting at *addr
R_API bool r_io_bank_locate(RIO *io, const ut32 bankid, ut64 *addr, const ut64 size, ut64 load_align) {
RIOBank *bank = r_io_bank_get (io, bankid);
r_return_val_if_fail (io && bank && bank->submaps && addr && size, false);
if (load_align == 0LL) {
load_align = 1;
}
RIOSubMap fake_sm;
memset (&fake_sm, 0x00, sizeof(RIOSubMap));
fake_sm.itv.addr = *addr + (load_align - *addr % load_align) % load_align;
fake_sm.itv.size = size;
RRBNode *entry = _find_entry_submap_node (bank, &fake_sm);
if (!entry) {
// no submaps in this bank
*addr = fake_sm.itv.addr;
return true;
}
// this is a bit meh: first iteration can never be successful,
// bc entry->sm will always intersect with fake_sm, if
// _find_entry_submap_node suceeded previously
ut64 next_location = fake_sm.itv.addr;
while (entry) {
RIOSubMap *sm = (RIOSubMap *)entry->data;
if (size <= r_io_submap_from (sm) - next_location) {
*addr = next_location;
return true;
}
next_location = (r_io_submap_to (sm) + 1) +
(load_align - ((r_io_submap_to (sm) + 1) % load_align)) % load_align;
entry = r_rbnode_next (entry);
}
if (next_location == 0LL) {
// overflow from last submap in the tree => no location
return false;
}
if (UT64_MAX - size + 1 < next_location) {
return false;
}
*addr = next_location;
return true;
}
R_API bool r_io_bank_read_at(RIO *io, const ut32 bankid, ut64 addr, ut8 *buf, int len) {
RIOBank *bank = r_io_bank_get (io, bankid);
r_return_val_if_fail (io && bank, false);
RIOSubMap fake_sm;
memset (&fake_sm, 0x00, sizeof(RIOSubMap));
fake_sm.itv.addr = addr;
fake_sm.itv.size = len;
RRBNode *node;
if (bank->last_used && r_io_submap_contain (((RIOSubMap *)bank->last_used->data), addr)) {
node = bank->last_used;
} else {
node = _find_entry_submap_node (bank, &fake_sm);
}
memset (buf, io->Oxff, len);
RIOSubMap *sm = node ? (RIOSubMap *)node->data : NULL;
bool ret = true;
while (sm && r_io_submap_overlap ((&fake_sm), sm)) {
bank->last_used = node;
RIOMap *map = r_io_map_get_by_ref (io, &sm->mapref);
if (!map) {
// mapref doesn't belong to map
return false;
}
if (!(map->perm & R_PERM_R)) {
node = r_rbnode_next (node);
sm = node ? (RIOSubMap *)node->data : NULL;
continue;
}
const ut64 buf_off = R_MAX (addr, r_io_submap_from (sm)) - addr;
const int read_len = R_MIN (r_io_submap_to ((&fake_sm)),
r_io_submap_to (sm)) - (addr + buf_off) + 1;
const ut64 paddr = addr + buf_off - r_io_map_from (map) + map->delta;
ret &= (r_io_fd_read_at (io, map->fd, paddr, &buf[buf_off], read_len) == read_len);
// check return value here?
node = r_rbnode_next (node);
sm = node ? (RIOSubMap *)node->data : NULL;
}
return ret;
}
R_API bool r_io_bank_write_at(RIO *io, const ut32 bankid, ut64 addr, const ut8 *buf, int len) {
RIOBank *bank = r_io_bank_get (io, bankid);
r_return_val_if_fail (io && bank, false);
RIOSubMap fake_sm;
memset (&fake_sm, 0x00, sizeof (RIOSubMap));
fake_sm.itv.addr = addr;
fake_sm.itv.size = len;
RRBNode *node;
if (bank->last_used && r_io_submap_contain (((RIOSubMap *)bank->last_used->data), addr)) {
node = bank->last_used;
} else {
node = _find_entry_submap_node (bank, &fake_sm);
}
RIOSubMap *sm = node ? (RIOSubMap *)node->data : NULL;
bool ret = true;
while (sm && r_io_submap_overlap ((&fake_sm), sm)) {
bank->last_used = node;
RIOMap *map = r_io_map_get_by_ref (io, &sm->mapref);
if (!map) {
// mapref doesn't belong to map
return false;
}
if (!(map->perm & R_PERM_W)) {
node = r_rbnode_next (node);
sm = node ? (RIOSubMap *)node->data : NULL;
ret = false;
continue;
}
const ut64 buf_off = R_MAX (addr, r_io_submap_from (sm)) - addr;
const int write_len = R_MIN (r_io_submap_to ((&fake_sm)),
r_io_submap_to (sm)) - (addr + buf_off) + 1;
const ut64 paddr = addr + buf_off - r_io_map_from (map) + map->delta;
ret &= (r_io_fd_write_at (io, map->fd, paddr, &buf[buf_off], write_len) == write_len);
// check return value here?
node = r_rbnode_next (node);
sm = node ? (RIOSubMap *)node->data : NULL;
}
return ret;
}
// reads only from single submap at addr and returns amount of bytes read.
// if no submap is mapped at addr, fcn returns 0. returns -1 on error
R_API int r_io_bank_read_from_submap_at(RIO *io, const ut32 bankid, ut64 addr, ut8 *buf, int len) {
RIOBank *bank = r_io_bank_get (io, bankid);
r_return_val_if_fail (io && bank, -1);
if (!len) {
return 0;
}
RRBNode *node;
if (bank->last_used && r_io_submap_contain (((RIOSubMap *)bank->last_used->data), addr)) {
node = bank->last_used;
} else {
node = r_crbtree_find_node (bank->submaps, &addr, _find_sm_by_vaddr_cb, NULL);
if (!node) {
return 0;
}
bank->last_used = node;
}
RIOSubMap *sm = (RIOSubMap *)node->data;
if (!r_io_submap_contain (sm, addr)) {
return 0;
}
RIOMap *map = r_io_map_get_by_ref (io, &sm->mapref);
if (!map || !(map->perm & R_PERM_R)) {
return -1;
}
const int read_len = R_MIN (len, r_io_submap_to (sm) - addr + 1);
const ut64 paddr = addr - r_io_map_from (map) + map->delta;
return r_io_fd_read_at (io, map->fd, paddr, buf, read_len);
}
// writes only to single submap at addr and returns amount of bytes written.
// if no submap is mapped at addr, fcn returns 0. returns -1 on error
R_API int r_io_bank_write_to_submap_at(RIO *io, const ut32 bankid, ut64 addr, const ut8 *buf, int len) {
RIOBank *bank = r_io_bank_get (io, bankid);
r_return_val_if_fail (io && bank, -1);
if (!len) {
return 0;
}
RRBNode *node;
if (bank->last_used && r_io_submap_contain (((RIOSubMap *)bank->last_used->data), addr)) {
node = bank->last_used;
} else {
node = r_crbtree_find_node (bank->submaps, &addr, _find_sm_by_vaddr_cb, NULL);
if (!node) {
return 0;
}
bank->last_used = node;
}
RIOSubMap *sm = (RIOSubMap *)node->data;
if (!r_io_submap_contain (sm, addr)) {
return 0;
}
RIOMap *map = r_io_map_get_by_ref (io, &sm->mapref);
if (!map || !(map->perm & R_PERM_W)) {
return -1;
}
const int write_len = R_MIN (len, r_io_submap_to (sm) - addr + 1);
const ut64 paddr = addr - r_io_map_from (map) + map->delta;
return r_io_fd_write_at (io, map->fd, paddr, buf, write_len);
}
R_API RIOMap *r_io_bank_get_map_at(RIO *io, const ut32 bankid, ut64 addr) {
RIOBank *bank = r_io_bank_get (io, bankid);
r_return_val_if_fail (io && bank, NULL);
RRBNode *node = r_crbtree_find_node (bank->submaps, &addr, _find_sm_by_vaddr_cb, NULL);
if (!node) {
return NULL;
}
RIOSubMap *sm = (RIOSubMap *)node->data;
if (!r_io_submap_contain (sm, addr)) {
return NULL;
}
return r_io_map_get_by_ref (io, &sm->mapref);
}
// deletes map with mapid from bank with bankid
R_API void r_io_bank_del_map(RIO *io, const ut32 bankid, const ut32 mapid) {
// no need to check for mapref here, since this is "just" deleting
RIOBank *bank = r_io_bank_get (io, bankid);
RIOMap *map = r_io_map_get (io, mapid); //is this needed?
r_return_if_fail (bank && map);
RListIter *iter;
RIOMapRef *mapref = NULL;
r_list_foreach_prev (bank->maprefs, iter, mapref) {
if (mapref->id == map->id) {
_delete_submaps_from_bank_tree (io, bank, iter, map);
r_list_delete (bank->maprefs, iter);
break;
}
}
bank->last_used = NULL;
// map is not referenced by this bank; nothing to do
}
R_API void r_io_bank_del(RIO *io, const ut32 bankid) {
r_id_storage_delete (io->banks, bankid);
if (io->bank == bankid) {
io->bank = r_io_bank_first (io);
}
}
// merges nearby submaps, that have a map ref to the same map, and free unneeded tree nodes
R_API void r_io_bank_drain(RIO *io, const ut32 bankid) {
r_return_if_fail (io);
RIOBank *bank = r_io_bank_get (io, bankid);
if (!bank) {
return;
}
bank->last_used = NULL;
RRBNode *node = r_crbtree_first_node (bank->submaps);
RRBNode *next = NULL;
while (node) {
next = r_rbnode_next (node);
if (next) {
RIOSubMap *bd = (RIOSubMap *)node->data;
RIOSubMap *sm = (RIOSubMap *)next->data;
if (!memcmp (&bd->mapref, &sm->mapref, sizeof (RIOMapRef))) {
r_io_submap_set_to (bd, r_io_submap_to (sm));
r_crbtree_delete (bank->submaps, sm, _find_sm_by_from_vaddr_cb, NULL);
continue;
}
}
node = next;
}
}
R_IPI bool io_bank_has_map(RIO *io, const ut32 bankid, const ut32 mapid) {
RIOBank *bank = r_io_bank_get (io, bankid);
r_return_val_if_fail (io && bank, false);
RListIter *iter;
RIOMapRef *mapref;
r_list_foreach (bank->maprefs, iter, mapref) {
if (mapref->id == mapid) {
return true;
}
}
return false;
}