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-rw-r--r--src/arch/x86/Makefile.am1
-rw-r--r--src/arch/x86/instruction.h4
-rw-r--r--src/arch/x86/op_lea.c92
-rw-r--r--src/arch/x86/op_push.c52
-rw-r--r--src/arch/x86/opcodes.h6
-rw-r--r--src/arch/x86/processor.c4
6 files changed, 159 insertions, 0 deletions
diff --git a/src/arch/x86/Makefile.am b/src/arch/x86/Makefile.am
index aba9e5b..238cf61 100644
--- a/src/arch/x86/Makefile.am
+++ b/src/arch/x86/Makefile.am
@@ -11,6 +11,7 @@ libarchx86_a_SOURCES = \
op_hlt.c \
op_inc.c \
op_int.c \
+ op_lea.c \
op_leave.c \
op_nop.c \
op_mov.c \
diff --git a/src/arch/x86/instruction.h b/src/arch/x86/instruction.h
index f8c2f7d..1a9b6d4 100644
--- a/src/arch/x86/instruction.h
+++ b/src/arch/x86/instruction.h
@@ -90,6 +90,8 @@ typedef enum _X86Opcodes
X86_OP_MOV_FROM_CONTENT1632, /* mov ([0x66] 0x8b) */
+ X86_OP_LEA, /* lea ([0x66] 0x8d) */ /* 66 ? */
+
X86_OP_NOP, /* nop (0x90) */
X86_OP_MOV_E_AX, /* mov ([0x66] 0xb8) */
@@ -113,6 +115,8 @@ typedef enum _X86Opcodes
X86_OP_HLT, /* hlt (0xf4) */
+ X86_OP_PUSH_CONTENT, /* push ([0x66] 0xff) */ /* 66 ? */
+
X86_OP_COUNT
} X86Opcodes;
diff --git a/src/arch/x86/op_lea.c b/src/arch/x86/op_lea.c
new file mode 100644
index 0000000..2622ebf
--- /dev/null
+++ b/src/arch/x86/op_lea.c
@@ -0,0 +1,92 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * op_lea.c - décodage des chargements d'adresse effective
+ *
+ * Copyright (C) 2008 Cyrille Bagard
+ *
+ * This file is part of OpenIDA.
+ *
+ * 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 <malloc.h>
+
+
+#include "../instruction-int.h"
+#include "opcodes.h"
+#include "operand.h"
+
+
+
+/******************************************************************************
+* *
+* Paramètres : data = flux de données à analyser. *
+* pos = position courante dans ce flux. [OUT] *
+* len = taille totale des données à analyser. *
+* offset = adresse virtuelle de l'instruction. *
+* proc = architecture ciblée par le désassemblage. *
+* *
+* Description : Décode une instruction de type 'lea' (16 ou 32 bits). *
+* *
+* Retour : Instruction mise en place ou NULL. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+asm_x86_instr *read_instr_lea(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+{
+ asm_x86_instr *result; /* Instruction à retourner */
+ AsmOperandSize oprsize; /* Taille des opérandes */
+ asm_x86_operand *reg1; /* Registre de destination */
+ asm_x86_operand *reg2; /* Registre de source */
+
+ result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
+
+ /* Utilisation des registres 32 bits ? */
+ if (data[*pos] == 0x66)
+ {
+ oprsize = switch_x86_operand_size(proc);
+ (*pos)++;
+ }
+ else oprsize = get_x86_current_operand_size(proc);
+
+ ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
+
+ reg1 = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, false);
+ if (reg1 == NULL)
+ {
+ (*pos)--;
+ free(result);
+ return NULL;
+ }
+
+ reg2 = x86_create_content1632_operand(data, pos, len, oprsize == AOS_32_BITS, true);
+ if (reg2 == NULL)
+ {
+ (*pos)--;
+ free(result);
+ return NULL;
+ }
+
+ ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
+ ASM_INSTRUCTION(result)->operands_count = 2;
+
+ ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg1);
+ ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(reg2);
+
+ return result;
+
+}
diff --git a/src/arch/x86/op_push.c b/src/arch/x86/op_push.c
index 0edd9bc..b577177 100644
--- a/src/arch/x86/op_push.c
+++ b/src/arch/x86/op_push.c
@@ -47,6 +47,58 @@
* *
******************************************************************************/
+asm_x86_instr *read_instr_push_content(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+{
+ asm_x86_instr *result; /* Instruction à retourner */
+ AsmOperandSize oprsize; /* Taille des opérandes */
+ asm_x86_operand *content; /* Registre de source */
+
+ result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
+
+ /* Utilisation des registres 32 bits ? */
+ if (data[*pos] == 0x66)
+ {
+ oprsize = switch_x86_operand_size(proc);
+ (*pos)++;
+ }
+ else oprsize = get_x86_current_operand_size(proc);
+
+ ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
+
+ content = x86_create_content1632_operand(data, pos, len, oprsize == AOS_32_BITS, true);
+ if (content == NULL)
+ {
+ (*pos)--;
+ free(result);
+ return NULL;
+ }
+
+ ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
+ ASM_INSTRUCTION(result)->operands_count = 1;
+
+ ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(content);
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : data = flux de données à analyser. *
+* pos = position courante dans ce flux. [OUT] *
+* len = taille totale des données à analyser. *
+* offset = adresse virtuelle de l'instruction. *
+* proc = architecture ciblée par le désassemblage. *
+* *
+* Description : Décode une instruction de type 'push' (16 ou 32 bits). *
+* *
+* Retour : Instruction mise en place ou NULL. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
asm_x86_instr *read_instr_push_imm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
{
asm_x86_instr *result; /* Instruction à retourner */
diff --git a/src/arch/x86/opcodes.h b/src/arch/x86/opcodes.h
index 349ea40..1d3611f 100644
--- a/src/arch/x86/opcodes.h
+++ b/src/arch/x86/opcodes.h
@@ -58,6 +58,9 @@ asm_x86_instr *read_instr_inc_1632(const uint8_t *, off_t *, off_t, uint64_t, co
/* Décode une instruction de type 'int'. */
asm_x86_instr *read_instr_int(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+/* Décode une instruction de type 'lea' (16 ou 32 bits). */
+asm_x86_instr *read_instr_lea(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
/* Décode une instruction de type 'leave'. */
asm_x86_instr *read_instr_leave(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
@@ -83,6 +86,9 @@ asm_x86_instr *read_instr_or8_with_reg1632(const uint8_t *, off_t *, off_t, uint
asm_x86_instr *read_instr_pop_reg1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
/* Décode une instruction de type 'push' (16 ou 32 bits). */
+asm_x86_instr *read_instr_push_content(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'push' (16 ou 32 bits). */
asm_x86_instr *read_instr_push_imm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
/* Décode une instruction de type 'push' (16 ou 32 bits). */
diff --git a/src/arch/x86/processor.c b/src/arch/x86/processor.c
index f632f4b..c7382ed 100644
--- a/src/arch/x86/processor.c
+++ b/src/arch/x86/processor.c
@@ -247,6 +247,8 @@ void x86_register_instructions(asm_x86_processor *proc)
register_opcode(proc->opcodes[X86_OP_MOV_FROM_CONTENT1632], 0x66, 0x8b, "mov", read_instr_mov_from_content_1632);
+ register_opcode(proc->opcodes[X86_OP_LEA], 0x66, 0x8d, "lea", read_instr_lea);
+
register_opcode(proc->opcodes[X86_OP_NOP], 0x00, 0x90, "nop", read_instr_nop);
register_opcode(proc->opcodes[X86_OP_MOV_E_AX], 0x66, 0xb8, "mov", read_instr_mov_to_1632);
@@ -271,6 +273,8 @@ void x86_register_instructions(asm_x86_processor *proc)
register_opcode(proc->opcodes[X86_OP_HLT], 0x00, 0xf4, "hlt", read_instr_hlt);
+ register_opcode(proc->opcodes[X86_OP_PUSH_CONTENT], 0x66, 0xff, "push", read_instr_push_content);
+
}
generated by cgit v0.11.2-87-g4458 at 2024-11-11 23:18:18 (GMT)