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/* OpenIDA - Outil d'analyse de fichiers binaires
* links.c - résolution des liens entre différentes instructions
*
* Copyright (C) 2010 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 "links.h"
/******************************************************************************
* *
* Paramètres : list = ensemble d'instructions à relier. *
* 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 : Etablit les liens entres les différentes lignes de code. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
void establish_links_between_lines(GArchInstruction *list, GBinRoutine **routines, size_t count, GtkExtStatusBar *statusbar, guint id)
{
size_t i; /* Boucle de parcours */
vmpa_t start; /* Adresse de départ */
vmpa_t end; /* Adresse de fin */
GArchInstruction *iter; /* Boucle de parcours */
vmpa_t addr; /* Adresse référencée */
InstructionLinkType type; /* Type de référence */
GArchInstruction *target; /* Ligne visée par la référence*/
GArchInstruction *prev; /* Instruction précédente */
for (i = 0; i < count; i++)
{
start = g_binary_routine_get_address(routines[i]);
end = start + g_binary_routine_get_size(routines[i]);
/* Définition de toutes les destinations */
for (iter = g_arch_instruction_find_by_address(list, start, true);
iter != NULL;
iter = g_arch_instruction_get_next_iter(list, iter, end))
{
type = g_arch_instruction_get_link(iter, &addr);
switch (type)
{
case ILT_NONE:
break;
case ILT_JUMP:
target = g_arch_instruction_find_by_address(list, addr, true);
if (target != NULL)
g_arch_instruction_link_with(iter, target, type);
break;
case ILT_JUMP_IF_FALSE:
break;
case ILT_JUMP_IF_TRUE:
target = g_arch_instruction_find_by_address(list, addr, true);
if (target != NULL)
{
g_arch_instruction_link_with(iter, target, type);
target = g_arch_instruction_get_next_iter(list, iter, end);
if (target != NULL)
g_arch_instruction_link_with(iter, target, ILT_JUMP_IF_FALSE);
}
break;
case ILT_CALL:
target = g_arch_instruction_find_by_address(list, addr, true);
if (target != NULL)
g_arch_instruction_link_with(iter, target, type);
break;
default:
/**
* Note pour GCC : à ce stade du désassemblage, ILT_CATCH_EXCEPTION
* ne peut être présente, car ne provenant que de greffons.
* Pour ILT_EXEC_FLOW, sa seule insertion est ici, plus bas.
*/
break;
}
}
/* Rattachement de deux blocs selon le flux normal */
iter = g_arch_instruction_find_by_address(list, start, true);
if (iter == NULL)
printf("no match for 0x%08llx\n", start);
if (iter != NULL)
for (iter = g_arch_instruction_get_next_iter(list, iter, end);
iter != NULL;
iter = g_arch_instruction_get_next_iter(list, iter, end))
{
if (!g_arch_instruction_has_sources(iter))
continue;
prev = g_arch_instruction_get_prev_iter(list, iter);
if (g_arch_instruction_is_return(prev))
continue;
if (!g_arch_instruction_has_destinations(prev))
g_arch_instruction_link_with(prev, iter, ILT_EXEC_FLOW);
}
gtk_extended_status_bar_update_activity(statusbar, id, (i + 1) * 1.0 / count);
}
}
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