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Diffstat (limited to 'src/arch/post.c')
-rw-r--r-- | src/arch/post.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/arch/post.c b/src/arch/post.c new file mode 100644 index 0000000..7d5f134 --- /dev/null +++ b/src/arch/post.c @@ -0,0 +1,113 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * post.c - traitements complémentaires à la phase de désassemblage + * + * Copyright (C) 2016 Cyrille Bagard + * + * This file is part of Chrysalide. + * + * 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 "post.h" + + +#include <assert.h> + + +#include "processor.h" +#include "target.h" + + + +/****************************************************************************** +* * +* Paramètres : instr = instruction ARMv7 à traiter. * +* proc = représentation de l'architecture utilisée. * +* context = contexte associé à la phase de désassemblage. * +* format = accès aux données du binaire d'origine. * +* index = indice de l'opérande précisant le saut. * +* type = type du nouveau simple à mettre en place. * +* * +* Description : Associe un symbole à la valeur ciblée par un opérande. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +void post_process_target_resolution(GArchInstruction *instr, GArchProcessor *proc, GProcContext *context, GBinFormat *format, size_t index, SymbolType type) +{ + GArchOperand *op; /* Opérande numérique en place */ + virt_t addr; /* Adresse visée par le saut */ + MemoryDataSize ptr_size; /* Taille de l'espace mémoire */ + GArchOperand *new; /* Instruction de ciblage */ + vmpa2t target; + mrange_t trange; /* Etendue du symbole à créer */ + VMPA_BUFFER(loc); + char name[5 + VMPA_MAX_LEN]; + GBinRoutine *routine; /* Nouvelle routine trouvée */ + GBinSymbol *symbol; /* Nouveau symbole construit */ + + op = g_arch_instruction_get_operand(instr, index); + assert(G_IS_IMM_OPERAND(op)); + + if (g_imm_operand_to_virt_t(G_IMM_OPERAND(op), &addr) + && g_exe_format_translate_address_into_vmpa(G_EXE_FORMAT(format), addr, &target)) + { + ptr_size = g_arch_processor_get_memory_size(proc); + + new = g_target_operand_new(ptr_size, addr); + + if (!g_target_operand_resolve(G_TARGET_OPERAND(new), format, true)) + { + vmpa2_virt_to_string(&target, MDS_UNDEFINED, loc, NULL); + + switch (type) + { + case STP_ROUTINE: + snprintf(name, sizeof(name), "loc_%s", loc + 2); + break; + + case STP_CODE_LABEL: + snprintf(name, sizeof(name), "sub_%s", loc + 2); + break; + + default: + assert(false); + break; + + } + + routine = g_binary_routine_new(); + g_binary_routine_set_name(routine, strdup(name)); + + init_mrange(&trange, &target, 0); + g_binary_routine_set_range(routine, &trange); + + symbol = g_binary_symbol_new(type); + g_binary_symbol_attach_routine(symbol, routine); + g_binary_format_add_symbol(G_BIN_FORMAT(format), symbol); + + g_target_operand_resolve(G_TARGET_OPERAND(new), format, true); + + } + + g_arch_instruction_replace_operand(instr, new, op); + + } + +} |