diff options
author | Cyrille Bagard <nocbos@gmail.com> | 2017-12-02 11:04:35 (GMT) |
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committer | Cyrille Bagard <nocbos@gmail.com> | 2017-12-02 11:04:35 (GMT) |
commit | 2c988d3ec52cc4c949a35aca7ef335dac773df92 (patch) | |
tree | fe650d2fc8ddceb606abdf0d2e14e5ef6596be82 /plugins/arm/v7/link.c | |
parent | 23abef53590bf3dd6f88ff4dbe81e306abfa4386 (diff) |
Created a plugin for the ARM support.
Diffstat (limited to 'plugins/arm/v7/link.c')
-rw-r--r-- | plugins/arm/v7/link.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/plugins/arm/v7/link.c b/plugins/arm/v7/link.c new file mode 100644 index 0000000..68cde7b --- /dev/null +++ b/plugins/arm/v7/link.c @@ -0,0 +1,114 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * link.c - édition des liens après la phase de désassemblage ARM v7 + * + * 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 "link.h" + + +#include <assert.h> + + +#include "operands/reglist.h" +#include "../register.h" + + + +/****************************************************************************** +* * +* Paramètres : instr = instruction ARM à traiter. * +* proc = représentation de l'architecture utilisée. * +* context = contexte associé à la phase de désassemblage. * +* format = acès aux données du binaire d'origine. * +* * +* Description : Encadre les sauts à partir de registres ARMv7. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +void handle_armv7_conditional_branch_from_register(GArchInstruction *instr, GArchProcessor *proc, GProcContext *context, GExeFormat *format) +{ + GArchOperand *op; /* Opérande numérique en place */ + GArmRegister *reg; /* Registre matériel manipulé */ + + op = g_arch_instruction_get_operand(instr, 0); + assert(G_IS_REGISTER_OPERAND(op)); + + reg = G_ARM_REGISTER(g_register_operand_get_register(G_REGISTER_OPERAND(op))); + + if (g_arm_register_get_index(reg) == 14 /* lr */) + g_arch_instruction_set_flag(instr, AIF_RETURN_POINT); + + else + g_arch_instruction_set_flag(instr, AIF_RETURN_POINT); /* FIXME : jump inconnu ! */ + + g_object_unref(G_OBJECT(reg)); + + g_object_unref(G_OBJECT(op)); + +} + + +/****************************************************************************** +* * +* Paramètres : instr = instruction ARM à traiter. * +* proc = représentation de l'architecture utilisée. * +* context = contexte associé à la phase de désassemblage. * +* format = acès aux données du binaire d'origine. * +* * +* Description : Détecte les fins de procédures à base d'instructions 'pop'. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +void handle_armv7_return_from_pop(GArchInstruction *instr, GArchProcessor *proc, GProcContext *context, GExeFormat *format) +{ + GArchOperand *op; /* Opérande numérique en place */ + GArmV7RegListOperand *reglist; /* Autre version de l'instance */ + size_t count; /* Nombre de registres présents*/ + size_t i; /* Boucle de parcours */ + GArmRegister *reg; /* Registre matériel manipulé */ + + op = g_arch_instruction_get_operand(instr, 0); + assert(G_IS_ARMV7_REGLIST_OPERAND(op)); + + reglist = G_ARMV7_REGLIST_OPERAND(op); + + count = g_armv7_reglist_count_registers(reglist); + + for (i = 0; i < count; i++) + { + reg = G_ARM_REGISTER(g_armv7_reglist_operand_get_register(reglist, i)); + + if (g_arm_register_get_index(reg) == 15 /* pc */) + g_arch_instruction_set_flag(instr, AIF_RETURN_POINT); + + } + + g_object_unref(G_OBJECT(op)); + +} |