diff options
author | Cyrille Bagard <nocbos@gmail.com> | 2018-11-24 11:41:13 (GMT) |
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committer | Cyrille Bagard <nocbos@gmail.com> | 2018-11-24 11:41:13 (GMT) |
commit | dad453ff553f0ab07206f26345dc0adeffb775fd (patch) | |
tree | 322f3b26da0d0d25011b7e64afc7c7ee37aa5608 /plugins/dwarf/dwarf.c | |
parent | 615171f171f53791a25aeab7970e29b024177d48 (diff) |
Moved the DWARF support as plugin and disabled it.
Diffstat (limited to 'plugins/dwarf/dwarf.c')
-rw-r--r-- | plugins/dwarf/dwarf.c | 337 |
1 files changed, 337 insertions, 0 deletions
diff --git a/plugins/dwarf/dwarf.c b/plugins/dwarf/dwarf.c new file mode 100644 index 0000000..0c0dab8 --- /dev/null +++ b/plugins/dwarf/dwarf.c @@ -0,0 +1,337 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * dwarf.c - support du format Dwarf + * + * Copyright (C) 2009-2017 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 Chrysalide. If not, see <http://www.gnu.org/licenses/>. + */ + + +#include "dwarf.h" + + +#include "abbrev.h" +#include "dwarf-int.h" +#include "info.h" +#include "symbols.h" +#include "../../common/cpp.h" + + + +/* Initialise la classe des formats de débogage DWARF. */ +static void g_dwarf_format_class_init(GDwarfFormatClass *); + +/* Initialise une instance de format de débogage DWARF. */ +static void g_dwarf_format_init(GDwarfFormat *); + +/* Supprime toutes les références externes. */ +static void g_dwarf_format_dispose(GDwarfFormat *); + +/* Procède à la libération totale de la mémoire. */ +static void g_dwarf_format_finalize(GDwarfFormat *); + + + +/****************************************************************************** +* * +* Paramètres : content = contenu binaire à parcourir. * +* parent = éventuel format exécutable déjà chargé. * +* unused = adresse non utilisée ici. * +* key = identifiant de format trouvé ou NULL. [OUT] * +* * +* Description : Indique si le format peut être pris en charge ici. * +* * +* Retour : Conclusion de haut niveau sur la reconnaissance effectuée. * +* * +* Remarques : - * +* * +******************************************************************************/ + +FormatMatchStatus dwarf_is_matching(GBinContent *content, GExeFormat *parent, void *unused, char **key) +{ + FormatMatchStatus result; /* Bilan à renvoyer */ + size_t i; /* Boucle de parcours */ + mrange_t range; /* Couverture d'une section */ + dw_section_header header; /* En-tête DWARF de section */ + bool found; /* Bilan d'une comparaison */ + + static const char *section_names[] = { + ".debug_aranges", + ".debug_frame", + ".debug_info", + ".debug_line", + ".debug_pubnames", + ".debug_pubtypes", + ".debug_types" + }; + + static const uint16_t dwarf_v2_versions[] = { + 2, /* .debug_aranges */ + 1, /* .debug_frame */ + 2, /* .debug_info */ + 2, /* .debug_line */ + 2, /* .debug_pubnames */ + 0, /* .debug_pubtypes */ + 0 /* .debug_types */ + }; + + static const uint16_t dwarf_v3_versions[] = { + 2, /* .debug_aranges */ + 3, /* .debug_frame */ + 3, /* .debug_info */ + 3, /* .debug_line */ + 2, /* .debug_pubnames */ + 2, /* .debug_pubtypes */ + 0 /* .debug_types */ + }; + + static const uint16_t dwarf_v4_versions[] = { + 2, /* .debug_aranges */ + 4, /* .debug_frame */ + 4, /* .debug_info */ + 4, /* .debug_line */ + 2, /* .debug_pubnames */ + 2, /* .debug_pubtypes */ + 4 /* .debug_types */ + }; + + uint16_t current_versions[] = { + 0, /* .debug_aranges */ + 0, /* .debug_frame */ + 0, /* .debug_info */ + 0, /* .debug_line */ + 0, /* .debug_pubnames */ + 0, /* .debug_pubtypes */ + 0 /* .debug_types */ + }; + + result = FMS_UNKNOWN; + + if (parent == NULL) + return FMS_UNKNOWN; + return FMS_UNKNOWN; + *key = strdup("dwarf_v4"); + return FMS_MATCHED; + + /* Lecture des indices présents */ + + for (i = 0; i < ARRAY_SIZE(section_names); i++) + { + if (!g_exe_format_get_section_range_by_name(parent, section_names[i], &range)) + continue; + + if (!read_dwarf_section_header(content, get_mrange_addr(&range), SRE_LITTLE /* FIXME */, &header)) + continue; + + current_versions[i] = header.version; + + } + + /* Détermination d'une version bien identifiée */ + + bool check_dwarf_version(const uint16_t *ref, const uint16_t *cur, size_t count) + { + bool equal; + size_t k; + + equal = true; + + for (k = 0; k < count && equal; k++) + printf(" -> %hhu vs %hhu\n", ref[k], cur[k]); + + for (k = 0; k < count && equal; k++) + equal = (cur[k] == 0) || (ref[k] == cur[k]); + + return equal; + + } + + /** + * Un fichier DWARF sans section sera vu comme un fichier DWARF de + * dernière génération. + * Ce qui n'est pas très grave car rien ne sera chargé par la suite, + * du fait de l'absence de section, donc il n'y aura pas d'incompatibilité. + */ + + printf("---dwarf v4\n"); + + found = check_dwarf_version(dwarf_v4_versions, current_versions, ARRAY_SIZE(section_names)); + + if (found) + { + result = FMS_MATCHED; + *key = strdup("dwarf_v4"); + } + + if (result == FMS_UNKNOWN) + { + printf("---dwarf v3\n"); + + found = check_dwarf_version(dwarf_v3_versions, current_versions, ARRAY_SIZE(section_names)); + + if (found) + { + result = FMS_MATCHED; + *key = strdup("dwarf_v3"); + } + + } + + if (result == FMS_UNKNOWN) + { + printf("---dwarf v2\n"); + + found = check_dwarf_version(dwarf_v2_versions, current_versions, ARRAY_SIZE(section_names)); + + if (found) + { + result = FMS_MATCHED; + *key = strdup("dwarf_v2"); + } + + } + + return result; + +} + + +/* Indique le type défini pour un format de débogage générique. */ +G_DEFINE_TYPE(GDwarfFormat, g_dwarf_format, G_TYPE_DBG_FORMAT); + + +/****************************************************************************** +* * +* Paramètres : klass = classe à initialiser. * +* * +* Description : Initialise la classe des formats de débogage DWARF. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_dwarf_format_class_init(GDwarfFormatClass *klass) +{ + GObjectClass *object; /* Autre version de la classe */ + + object = G_OBJECT_CLASS(klass); + + object->dispose = (GObjectFinalizeFunc/* ! */)g_dwarf_format_dispose; + object->finalize = (GObjectFinalizeFunc)g_dwarf_format_finalize; + +} + + +/****************************************************************************** +* * +* Paramètres : format = instance à initialiser. * +* * +* Description : Initialise une instance de format de débogage DWARF. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_dwarf_format_init(GDwarfFormat *format) +{ + +} + + +/****************************************************************************** +* * +* Paramètres : format = instance d'objet GLib à traiter. * +* * +* Description : Supprime toutes les références externes. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_dwarf_format_dispose(GDwarfFormat *format) +{ + G_OBJECT_CLASS(g_dwarf_format_parent_class)->dispose(G_OBJECT(format)); + +} + + +/****************************************************************************** +* * +* Paramètres : format = instance d'objet GLib à traiter. * +* * +* Description : Procède à la libération totale de la mémoire. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_dwarf_format_finalize(GDwarfFormat *format) +{ + G_OBJECT_CLASS(g_dwarf_format_parent_class)->finalize(G_OBJECT(format)); + +} + + +/****************************************************************************** +* * +* Paramètres : format = description du binaire de débogage à compléter. * +* executable = référence vers le binaire exécutable à lier. * +* * +* Description : Charge de façon générique toutes les informations DWARF. * +* * +* Retour : Bilan du chargement : réussi ou non ? * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool g_dwarf_format_load(GDwarfFormat *format, GExeFormat *executable) +{ + bool result; /* Bilan à faire remonter */ + + result = true; + + g_debuggable_format_attach_executable(G_DBG_FORMAT(format), executable); + + printf("Loading abbrev...\n"); + + result &= load_all_dwarf_abbreviations(format); + + printf("Loading debug info...\n"); + + result &= load_dwarf_debug_information(format); + + printf("Done!\n"); + + result &= load_dwarf_symbols(format); + + printf("Got symbols...\n"); + + exit(0); + + return result; + +} + |