diff options
author | Cyrille Bagard <nocbos@gmail.com> | 2014-09-01 22:20:28 (GMT) |
---|---|---|
committer | Cyrille Bagard <nocbos@gmail.com> | 2014-09-01 22:20:28 (GMT) |
commit | 04ca0756d59629113bd3f602565850a2910ac84e (patch) | |
tree | 26c70bc546e4ac55967530beb583dc851b2f82c9 /src/format | |
parent | a738b482b70d263252ec4dc18919c71503490297 (diff) |
Loaded some ELF symbols from DYNSYM and SYMTAB sections.
git-svn-id: svn://svn.gna.org/svn/chrysalide/trunk@397 abbe820e-26c8-41b2-8c08-b7b2b41f8b0a
Diffstat (limited to 'src/format')
-rw-r--r-- | src/format/elf/symbols.c | 150 | ||||
-rw-r--r-- | src/format/format.h | 2 | ||||
-rw-r--r-- | src/format/symbol.c | 24 | ||||
-rw-r--r-- | src/format/symbol.h | 7 |
4 files changed, 129 insertions, 54 deletions
diff --git a/src/format/elf/symbols.c b/src/format/elf/symbols.c index dc3fbe0..06d7cab 100644 --- a/src/format/elf/symbols.c +++ b/src/format/elf/symbols.c @@ -37,6 +37,7 @@ #include "../mangling/demangler.h" #include "../../arch/raw.h" #include "../../common/extstr.h" +#include "../../core/params.h" #include "../../gui/panels/log.h" @@ -123,6 +124,12 @@ bool load_elf_symbols(GElfFormat *format) + /* Symboles internes */ + result = load_elf_internal_symbols(format); + + + + /* Symboles externes */ if (find_elf_sections_by_type(format, SHT_DYNAMIC, §ions, &count)) @@ -137,7 +144,7 @@ bool load_elf_symbols(GElfFormat *format) else log_variadic_message(LMT_INFO, _("Binary is statically linked")); /* Symboles internes */ - result &= load_elf_internal_symbols(format); + //result &= load_elf_internal_symbols(format); return result; @@ -1272,70 +1279,137 @@ static bool annotate_elf_section_header_table(GElfFormat *format) static bool load_elf_internal_symbols(GElfFormat *format) { bool result; /* Bilan à retourner */ - elf_shdr *symtabs; /* Groupe de sections trouvées */ + bool no_name; /* Choix de construction de nom*/ + elf_shdr *sections; /* Groupe de sections trouvées */ size_t count; /* Quantité de données */ size_t i; /* Boucle de parcours */ - elf_shdr strtab; /* Section .strtab trouvée */ - bool has_strtab; /* Présence de cette section */ - off_t sym_start; /* Début de la zone à traiter */ - off_t sym_size; /* Taille de cette même zone */ - off_t iter; /* Boucle de parcours */ - const char *name; /* Nom du symbole trouvé */ - elf_sym sym; /* Symbole aux infos visées */ - GBinRoutine *routine; /* Nouvelle routine trouvée */ - GBinSymbol *symbol; /* Nouveau symbole construit */ result = true; - if (find_elf_sections_by_type(format, SHT_SYMTAB, &symtabs, &count)) - for (i = 0; i < count && result; i++) + /* Charge tous les symboles définis dans une section */ + bool add_all_symbols_from_section(GElfFormat *format, const elf_shdr *section, bool use_virt) + { + elf_shdr strtab; /* Section .strtab trouvée */ + bool has_strtab; /* Présence de cette section */ + off_t start; /* Début de la zone à traiter */ + off_t size; /* Taille de cette même zone */ + off_t iter; /* Boucle de parcours */ + elf_sym sym; /* Symbole aux infos visées */ + vmpa2t addr; /* Localisation d'une routine */ + const char *name; /* Nom du symbole trouvé */ + char alt_name[5 + VMPA_MAX_LEN]; /* Nom abstrait de substitution*/ + GBinRoutine *routine; /* Nouvelle routine trouvée */ + GBinSymbol *symbol; /* Nouveau symbole construit */ + + has_strtab = find_elf_section_by_index(format, ELF_SHDR(format, *section, sh_link), &strtab); + + get_elf_section_content(format, section, &start, &size, NULL); + + for (iter = start; iter < (start + size); ) { - has_strtab = find_elf_section_by_index(format, ELF_SHDR(format, symtabs[i], sh_link), &strtab); + result = read_elf_symbol(format, &iter, &sym); + if (!result) break; + + if (ELF_SYM(format, sym, st_value) == 0) continue; + + /* Résolution précise d'adresse */ + + + /* TODO */ + + init_vmpa(&addr, ELF_SYM(format, sym, st_value), VMPA_NO_VIRTUAL); - get_elf_section_content(format, &symtabs[i], &sym_start, &sym_size, NULL); - for (iter = sym_start; iter < (sym_start + sym_size); ) + + /* Première ébauche de nom */ + + if (!has_strtab) name = NULL; + else name = get_elf_symbol_name(format, section, &strtab, + ((iter - start) / ELF_SIZEOF_SYM(format)) - 1); + + /* Traitements particuliers */ + + switch (ELF_ST_TYPE(format, sym)) { - result = read_elf_symbol(format, &iter, &sym); - if (!result) break; + case STT_OBJECT: - if (ELF_SYM(format, sym, st_value) == 0) continue; + /* Création d'un nom unique ? */ - if (!(ELF_ST_TYPE(format, sym) == STT_FUNC)) continue; + if (name != NULL) + { + strcpy(alt_name, "obj_"); - if (!has_strtab) name = NULL; - else name = get_elf_symbol_name(format, &symtabs[i], &strtab, - ((iter - sym_start) / ELF_SIZEOF_SYM(format)) - 1); + if (use_virt) + vmpa2_virt_to_string(&addr, MDS_UNDEFINED, alt_name + 4, NULL); + else + vmpa2_phys_to_string(&addr, MDS_UNDEFINED, alt_name + 4, NULL); - if (name == NULL) - { - /* FIXME */ - name = "unknown"; - } + } + + + /* TODO */ + + symbol = NULL; - /* Routine */ - routine = try_to_demangle_routine(name); + break; + + case STT_FUNC: + + /* Création d'un nom unique ? */ + + if (name != NULL) + { + strcpy(alt_name, "func_"); + + if (use_virt) + vmpa2_virt_to_string(&addr, MDS_UNDEFINED, alt_name + 5, NULL); + else + vmpa2_phys_to_string(&addr, MDS_UNDEFINED, alt_name + 5, NULL); - g_binary_routine_set_address(routine, ELF_SYM(format, sym, st_value)); - g_binary_routine_set_size(routine, ELF_SYM(format, sym, st_size)); + } + + /* Routine */ + + routine = try_to_demangle_routine(name); - ///// reactiver g_binary_format_add_routine(G_BIN_FORMAT(format), routine); + g_binary_routine_set_address(routine, &addr); + g_binary_routine_set_size(routine, ELF_SYM(format, sym, st_size)); - /* Symbole uniquement */ + /* Symbole uniquement */ - symbol = g_binary_symbol_new(STP_FUNCTION, name, ELF_SYM(format, sym, st_value)); + symbol = g_binary_symbol_new(STP_ROUTINE, name, ~0); + g_binary_symbol_attach_routine(symbol, routine); - g_binary_symbol_attach_routine(symbol, routine); + break; - ///// reactiver g_binary_format_add_symbol(G_BIN_FORMAT(format), symbol); + default: + symbol = NULL; + break; } + if (symbol != NULL) + g_binary_format_add_symbol(G_BIN_FORMAT(format), symbol); } - return true; + return true; + + } + + if (!g_generic_config_get_value(get_main_configuration(), MPK_FORMAT_NO_NAME, &no_name)) + return false; + + if (find_elf_sections_by_type(format, SHT_DYNSYM, §ions, &count)) + for (i = 0; i < count && result; i++) + result = add_all_symbols_from_section(format, §ions[i], no_name); + + if (find_elf_sections_by_type(format, SHT_SYMTAB, §ions, &count)) + for (i = 0; i < count && result; i++) + result = add_all_symbols_from_section(format, §ions[i], no_name); + + return result; } diff --git a/src/format/format.h b/src/format/format.h index d87735d..2eed669 100644 --- a/src/format/format.h +++ b/src/format/format.h @@ -65,7 +65,7 @@ void g_binary_format_add_symbol(GBinFormat *, GBinSymbol *); GBinSymbol **g_binary_format_get_symbols(const GBinFormat *, size_t *); /* Ajoute une routine à la collection du format binaire. */ -void g_binary_format_add_routine(GBinFormat *, GBinRoutine *); +void g_binary_format_add_routine(GBinFormat *, GBinRoutine *) __attribute__ ((deprecated)); /* Fournit le prototype de toutes les routines détectées. */ GBinRoutine **g_binary_format_get_routines(const GBinFormat *, size_t *); diff --git a/src/format/symbol.c b/src/format/symbol.c index f1183cb..5b80555 100644 --- a/src/format/symbol.c +++ b/src/format/symbol.c @@ -192,8 +192,9 @@ vmpa_t g_binary_symbol_get_address(const GBinSymbol *symbol) /****************************************************************************** * * * Paramètres : symbol = symbole à venir consulter. * +* length = taille de l'instruction ou NULL. [OUT] * * * -* Description : Fournit l'adresse associée à un symbole. * +* Description : Fournit l'emplacement où se situe un symbole. * * * * Retour : Adresse virtuelle ou physique associée. * * * @@ -201,7 +202,7 @@ vmpa_t g_binary_symbol_get_address(const GBinSymbol *symbol) * * ******************************************************************************/ -const vmpa2t *g_binary_symbol_get_address2(const GBinSymbol *symbol) +const vmpa2t *g_binary_symbol_get_location(const GBinSymbol *symbol, off_t *length) { const vmpa2t *result; /* Localisation à retourner */ @@ -210,19 +211,20 @@ const vmpa2t *g_binary_symbol_get_address2(const GBinSymbol *symbol) switch (symbol->type) { case STP_DATA: - result = g_arch_instruction_get_location2(symbol->extra.instr, NULL); + result = g_arch_instruction_get_location2(symbol->extra.instr, length); break; - default: - result = NULL; - break; - - } - + case STP_ROUTINE: + result = g_binary_routine_get_address(symbol->extra.routine); + if (length != NULL) + *length = g_binary_routine_get_size(symbol->extra.routine); + break; - if (result == NULL) - printf("got addr=%p for symbol=%p (data=%d)\n", result, symbol, symbol->type == STP_DATA); + default: + result = NULL; + break; + } return result; diff --git a/src/format/symbol.h b/src/format/symbol.h index 407375f..8d27f97 100644 --- a/src/format/symbol.h +++ b/src/format/symbol.h @@ -37,6 +37,7 @@ typedef enum _SymbolType { STP_DATA, /* Données brutes */ + STP_ROUTINE, /* Simple morceau de code */ STP_OBJECT, /* Objet quelconque */ STP_FUNCTION, /* Simple morceau de code */ STP_STRING /* Chaîne de caractères */ @@ -73,10 +74,8 @@ const char *g_binary_symbol_to_string(const GBinSymbol *); /* Fournit l'adresse associée à un symbole. */ vmpa_t g_binary_symbol_get_address(const GBinSymbol *); - -/* Fournit l'adresse associée à un symbole. */ -const vmpa2t *g_binary_symbol_get_address2(const GBinSymbol *); - +/* Fournit l'emplacement où se situe un symbole. */ +const vmpa2t *g_binary_symbol_get_location(const GBinSymbol *, off_t *); /* Fournit la taille officielle d'un symbole. */ off_t g_binary_symbol_get_size(const GBinSymbol *); |