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authorCyrille Bagard <nocbos@gmail.com>2017-10-01 17:32:12 (GMT)
committerCyrille Bagard <nocbos@gmail.com>2017-10-01 17:32:12 (GMT)
commit208abfe4182c0dafc230e0377b3efcc6c24be0f9 (patch)
tree4e084364b0a211ee36a5e8e55b70367f01d720d5 /plugins/elf/dynamic.c
parent593aee561015251dfd042dc5e00388f63232c45f (diff)
Defined the ELF support as plugin.
Diffstat (limited to 'plugins/elf/dynamic.c')
-rw-r--r--plugins/elf/dynamic.c109
1 files changed, 109 insertions, 0 deletions
diff --git a/plugins/elf/dynamic.c b/plugins/elf/dynamic.c
new file mode 100644
index 0000000..782167c
--- /dev/null
+++ b/plugins/elf/dynamic.c
@@ -0,0 +1,109 @@
+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * program.c - gestion des en-têtes de programme d'un ELF
+ *
+ * Copyright (C) 2015-2017 Cyrille Bagard
+ *
+ * This file is part of Chrysalide.
+ *
+ * Chrysalide 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.
+ *
+ * Chrysalide 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 "dynamic.h"
+
+
+#include "elf-int.h"
+#include "program.h"
+
+
+
+/******************************************************************************
+* *
+* Paramètres : format = description de l'exécutable à consulter. *
+* index = indice de la section recherchée. *
+* dynamic = ensemble d'informations à faire remonter. [OUT] *
+* *
+* Description : Recherche un en-tête de programme DYNAMIC au sein de binaire.*
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+bool find_elf_dynamic_program_header(const GElfFormat *format, elf_phdr *dynamic)
+{
+ bool result; /* Bilan d'opération à renvoyer*/
+ uint16_t max; /* Nombre d'en-têtes présents */
+ uint16_t i; /* Boucle de parcours */
+
+ result = false;
+
+ max = ELF_HDR(format, format->header, e_phnum);
+
+ for (i = 0; i < max && !result; i++)
+ {
+ if (!find_elf_program_by_index(format, i, dynamic))
+ break;
+
+ result = (ELF_PHDR(format, *dynamic, p_type) == PT_DYNAMIC);
+
+ }
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : format = informations chargées à consulter. *
+* dynamic = programme de type PT_DYNAMIC. *
+* type = sorte d'élément recherché. *
+* item = élément retrouvé dans la section. [OUT] *
+* *
+* Description : Retrouve un élément donné dans la section dynamique. *
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+bool find_elf_dynamic_item_from_pheader(const GElfFormat *format, const elf_phdr *dynamic, int64_t type, elf_dyn *item)
+{
+ bool result; /* Bilan à retourner */
+ off_t max; /* Nombre d'entités présentes */
+ off_t i; /* Boucle de parcours */
+ phys_t pos; /* Position de lecture */
+
+ result = false;
+
+ max = ELF_PHDR(format, *dynamic, p_filesz) / ELF_SIZEOF_DYN(format);
+
+ for (i = 0; i < max && !result; i++)
+ {
+ pos = ELF_PHDR(format, *dynamic, p_offset) + i * ELF_SIZEOF_DYN(format);
+
+ if (!read_elf_dynamic_entry(format, pos, item))
+ break;
+
+ result = (ELF_DYN(format, *item, d_tag) == type);
+
+ }
+
+ return result;
+
+}