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authorCyrille Bagard <nocbos@gmail.com>2012-07-14 10:53:27 (GMT)
committerCyrille Bagard <nocbos@gmail.com>2012-07-14 10:53:27 (GMT)
commit9dad46d59fc491cac90795c418e3f973b85c2b4d (patch)
tree00b2618f9001d104490ab385dabb99c268237a3f /src/analysis/disass/limit.c
parent9371129c1b7aa830ed889abd4481cb505d90c4a7 (diff)
Limited all routines using code from binary.c.
git-svn-id: svn://svn.gna.org/svn/chrysalide/trunk@250 abbe820e-26c8-41b2-8c08-b7b2b41f8b0a
Diffstat (limited to 'src/analysis/disass/limit.c')
-rw-r--r--src/analysis/disass/limit.c156
1 files changed, 156 insertions, 0 deletions
diff --git a/src/analysis/disass/limit.c b/src/analysis/disass/limit.c
new file mode 100644
index 0000000..2598d7e
--- /dev/null
+++ b/src/analysis/disass/limit.c
@@ -0,0 +1,156 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * limit.c - détermination des bornes des routines
+ *
+ * Copyright (C) 2012 Cyrille Bagard
+ *
+ * This file is part of OpenIDA.
+ *
+ * OpenIDA 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; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * OpenIDA 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "limit.h"
+
+
+#include <malloc.h>
+
+
+
+/* Cherche l'adresse de fin d'une routine. */
+static vmpa_t find_best_ending_address_for_routine(GArchInstruction *, size_t, const vmpa_t *, const off_t *, size_t);
+
+
+
+/******************************************************************************
+* *
+* Paramètres : list = ensemble d'instructions désassemblées. *
+* routines = prototypes existants à insérer. *
+* count = quantité de ces prototypes. *
+* statusbar = barre de statut avec progression à mettre à jour.*
+* id = identifiant du message affiché à l'utilisateur. *
+* *
+* Description : S'assure que toutes les routines ont une taille définie. *
+* *
+* Retour : - *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+void limit_all_routines(GArchInstruction *list, GBinRoutine **routines, size_t count, GtkExtStatusBar *statusbar, guint id)
+{
+ size_t i; /* Boucle de parcours */
+ vmpa_t *starts; /* Adresses de départ */
+ off_t *lengths; /* Tailles des routines */
+ GArchInstruction *instr; /* Instr. de départ / arrivée */
+
+ if (count == 0) return;
+
+ starts = (vmpa_t *)calloc(count, sizeof(vmpa_t));
+ lengths = (off_t *)calloc(count, sizeof(off_t));
+
+ for (i = 0; i < count; i++)
+ {
+ starts[i] = g_binary_routine_get_address(routines[i]);
+ lengths[i] = g_binary_routine_get_size(routines[i]);
+
+ gtk_extended_status_bar_update_activity(statusbar, id, (i + 1) * 1.0 / (count * 2));
+
+ }
+
+ for (i = 0; i < count; i++)
+ {
+ /* Instruction de départ */
+
+ instr = g_arch_instruction_find_by_address(list, starts[i], true);
+ g_binary_routine_set_instructions(routines[i], instr);
+
+ if (lengths[i] > 0) goto lar_next;
+
+ /* Si le symbole est hors du code analysé (routine de PLT par exemple) */
+ if (instr == NULL) goto lar_next;
+
+ /* Taille de la routine */
+
+ lengths[i] = find_best_ending_address_for_routine(instr, i, starts, lengths, count);
+ lengths[i] -= starts[i];
+
+ g_binary_routine_set_size(routines[i], lengths[i]);
+
+ lar_next:
+
+ gtk_extended_status_bar_update_activity(statusbar, id, (i + 1 + count) * 1.0 / (count * 2));
+
+ }
+
+ free(starts);
+ free(lengths);
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : first = première instruction de la routine courante. *
+* index = indice de la routine traitée dans la liste. *
+* starts = adresse de départ des autres routines. *
+* lengths = taille des différentes routines, valides ou nulles.*
+* count = quantité de routines présentes. *
+* *
+* Description : Cherche l'adresse de fin d'une routine. *
+* *
+* Retour : Plus grande adresse de dernière instruction de routine. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static vmpa_t find_best_ending_address_for_routine(GArchInstruction *first, size_t index, const vmpa_t *starts, const off_t *lengths, size_t count)
+{
+ vmpa_t result; /* Haute adresse à remonter */
+ GArchInstruction *iter; /* Boucle de parcours #1 */
+ vmpa_t candidate; /* Candidat potentiel */
+ size_t i; /* Boucle de parcours #2 */
+
+ result = starts[index];
+
+ for (iter = first;
+ iter != NULL;
+ iter = g_arch_instruction_get_next_iter(first, iter, VMPA_MAX))
+ {
+ g_arch_instruction_get_location(iter, NULL, NULL, &candidate);
+
+ /* Regarde si on n'empiète pas sur une autre routine */
+
+ for (i = 0; i < count; i++)
+ {
+ if (i == index) continue;
+
+ if (starts[i] <= candidate && candidate < (starts[i] + lengths[i]))
+ break;
+
+ }
+
+ if (i != count) break;
+ else result = candidate;
+
+ /* Retour de fonction ? */
+ if (g_arch_instruction_is_return(iter)) break;
+
+ }
+
+ return result;
+
+}