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-rw-r--r--plugins/arm/v7/post.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/plugins/arm/v7/post.c b/plugins/arm/v7/post.c
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+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * post.c - traitements complémentaires à la phase de désassemblage
+ *
+ * Copyright (C) 2014-2017 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 "post.h"
+
+
+#include <arch/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. *
+* *
+* Description : Complète un désassemblage accompli pour une instruction. *
+* *
+* Retour : - *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+void post_process_ldr_instructions(GArchInstruction *instr, GArchProcessor *proc, GProcContext *context, GExeFormat *format)
+{
+ GArchOperand *op; /* Opérande numérique en place */
+ uint32_t addr; /* Adresse visée par le saut */
+ GBinFormat *bfmt; /* Version basique du format */
+ GTargetOperand *new; /* Instruction de ciblage */
+ vmpa2t target; /* Défination finale précise */
+ mrange_t trange; /* Etendue du symbole à créer */
+ VMPA_BUFFER(loc); /* Espace pour une conversion */
+ char name[5 + VMPA_MAX_LEN]; /* Etiquette à constituer */
+ GBinSymbol *symbol; /* Nouveau symbole construit */
+
+ g_arch_instruction_lock_operands(instr);
+
+ op = _g_arch_instruction_get_operand(instr, 1);
+
+ if (!G_IS_IMM_OPERAND(op))
+ goto ppli_release;
+
+ if (g_imm_operand_get_value(G_IMM_OPERAND(op), MDS_32_BITS_UNSIGNED, &addr)
+ && g_exe_format_translate_address_into_vmpa(format, addr, &target))
+ {
+ bfmt = G_BIN_FORMAT(format);
+
+ new = G_TARGET_OPERAND(g_target_operand_new(MDS_32_BITS_UNSIGNED, &target));
+
+ if (!g_target_operand_resolve(new, bfmt, true))
+ {
+ addr &= ~0x1;
+
+ init_mrange(&trange, &target, 0);
+
+ vmpa2_virt_to_string(&target, MDS_UNDEFINED, loc, NULL);
+ snprintf(name, sizeof(name), "loc_%s", loc + 2);
+
+ symbol = g_binary_symbol_new(&trange, STP_CODE_LABEL);
+ g_binary_symbol_set_alt_label(symbol, name);
+ g_binary_format_add_symbol(bfmt, symbol);
+
+ g_target_operand_resolve(new, bfmt, true);
+
+ }
+
+ _g_arch_instruction_replace_operand(instr, op, G_ARCH_OPERAND(new));
+
+ }
+
+ ppli_release:
+
+ g_object_unref(G_OBJECT(op));
+
+ g_arch_instruction_unlock_operands(instr);
+
+}