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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 "../../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);
}
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