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-rw-r--r--ChangeLog17
-rw-r--r--src/arch/immediate.c32
-rw-r--r--src/arch/x86/op_int.c30
-rw-r--r--src/arch/x86/opcodes.h6
-rw-r--r--src/arch/x86/operand.c7
-rw-r--r--src/arch/x86/processor.c2
6 files changed, 68 insertions, 26 deletions
diff --git a/ChangeLog b/ChangeLog
index 2a52897..48162e8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,20 @@
+09-05-19 Cyrille Bagard <nocbos@gmail.com>
+
+ * src/arch/immediate.c:
+ Print signed values as signed values.
+
+ * src/arch/x86/opcodes.h:
+ Rename x86_read_instr_int to x86_read_instr_int_imm8.
+
+ * src/arch/x86/operand.c:
+ Fix various bugs in the ModRM operand.
+
+ * src/arch/x86/op_int.c:
+ Rename x86_read_instr_int to x86_read_instr_int_imm8. Read the operand.
+
+ * src/arch/x86/processor.c:
+ Update call to x86_read_instr_int{,_imm8}.
+
09-05-18 Cyrille Bagard <nocbos@gmail.com>
* src/analysis/binary.c:
diff --git a/src/arch/immediate.c b/src/arch/immediate.c
index 876fa88..dde5f02 100644
--- a/src/arch/immediate.c
+++ b/src/arch/immediate.c
@@ -351,21 +351,29 @@ static char *g_imm_operand_get_text(const GImmOperand *operand, const exe_format
snprintf(result, 19, "$0x???");
break;
case AOS_8_BITS_UNSIGNED:
- case AOS_8_BITS_SIGNED:
snprintf(result, 19, "0x%hhx", operand->unsigned_imm.val8);
break;
case AOS_16_BITS_UNSIGNED:
- case AOS_16_BITS_SIGNED:
snprintf(result, 19, "0x%hx", operand->unsigned_imm.val16);
break;
case AOS_32_BITS_UNSIGNED:
- case AOS_32_BITS_SIGNED:
snprintf(result, 19, "0x%x", operand->unsigned_imm.val32);
break;
case AOS_64_BITS_UNSIGNED:
- case AOS_64_BITS_SIGNED:
snprintf(result, 19, "0x%llx", operand->unsigned_imm.val64);
break;
+ case AOS_8_BITS_SIGNED:
+ snprintf(result, 19, "0x%hhx", ~operand->signed_imm.val8 + 1);
+ break;
+ case AOS_16_BITS_SIGNED:
+ snprintf(result, 19, "0x%hx", ~operand->signed_imm.val16 + 1);
+ break;
+ case AOS_32_BITS_SIGNED:
+ snprintf(result, 19, "0x%x", ~operand->signed_imm.val32 + 1);
+ break;
+ case AOS_64_BITS_SIGNED:
+ snprintf(result, 19, "0x%llx", ~operand->signed_imm.val64 + 1);
+ break;
}
break;
@@ -376,21 +384,29 @@ static char *g_imm_operand_get_text(const GImmOperand *operand, const exe_format
snprintf(result, 19, "$0x???");
break;
case AOS_8_BITS_UNSIGNED:
- case AOS_8_BITS_SIGNED:
snprintf(result, 19, "$0x%hhx", operand->unsigned_imm.val8);
break;
case AOS_16_BITS_UNSIGNED:
- case AOS_16_BITS_SIGNED:
snprintf(result, 19, "$0x%hx", operand->unsigned_imm.val16);
break;
case AOS_32_BITS_UNSIGNED:
- case AOS_32_BITS_SIGNED:
snprintf(result, 19, "$0x%x", operand->unsigned_imm.val32);
break;
case AOS_64_BITS_UNSIGNED:
- case AOS_64_BITS_SIGNED:
snprintf(result, 19, "$0x%llx", operand->unsigned_imm.val64);
break;
+ case AOS_8_BITS_SIGNED:
+ snprintf(result, 19, "$0x%hhx", ~operand->signed_imm.val8 + 1);
+ break;
+ case AOS_16_BITS_SIGNED:
+ snprintf(result, 19, "$0x%hx", ~operand->signed_imm.val16 + 1);
+ break;
+ case AOS_32_BITS_SIGNED:
+ snprintf(result, 19, "$0x%x", ~operand->signed_imm.val32 + 1);
+ break;
+ case AOS_64_BITS_SIGNED:
+ snprintf(result, 19, "$0x%llx", ~operand->signed_imm.val64 + 1);
+ break;
}
break;
diff --git a/src/arch/x86/op_int.c b/src/arch/x86/op_int.c
index 98b5ce9..cbeda87 100644
--- a/src/arch/x86/op_int.c
+++ b/src/arch/x86/op_int.c
@@ -36,11 +36,10 @@
* Paramètres : data = flux de données à analyser. *
* pos = position courante dans ce flux. [OUT] *
* len = taille totale des données à analyser. *
-* addr = adresse virtuelle de l'instruction. *
-* prefix = éventuel(s) préfixe(s) remarqué(s). *
+* offset = adresse virtuelle de l'instruction. *
* proc = architecture ciblée par le désassemblage. *
* *
-* Description : Décode une instruction de type 'int'. *
+* Description : Décode une instruction de type 'int 3'. *
* *
* Retour : Instruction mise en place ou NULL. *
* *
@@ -48,11 +47,15 @@
* *
******************************************************************************/
-GArchInstruction *x86_read_instr_int(const bin_t *data, off_t *pos, off_t len, vmpa_t addr, X86Prefix prefix, const GX86Processor *proc)
+GArchInstruction *x86_read_instr_int_3(const bin_t *data, off_t *pos, off_t len, vmpa_t addr, X86Prefix prefix, const GX86Processor *proc)
{
GArchInstruction *result; /* Instruction à retourner */
+ GArchOperand *three; /* Argument artificiel */
- result = g_x86_instruction_new(XOP_INT);
+ result = g_x86_instruction_new(XOP_INT_3);
+
+ three = g_imm_operand_new_from_value(AOS_8_BITS, 3);
+ g_arch_instruction_attach_one_operand(result, three);
return result;
@@ -64,10 +67,11 @@ GArchInstruction *x86_read_instr_int(const bin_t *data, off_t *pos, off_t len, v
* 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. *
+* addr = adresse virtuelle de l'instruction. *
+* prefix = éventuel(s) préfixe(s) remarqué(s). *
* proc = architecture ciblée par le désassemblage. *
* *
-* Description : Décode une instruction de type 'int 3'. *
+* Description : Décode une instruction de type 'int'. *
* *
* Retour : Instruction mise en place ou NULL. *
* *
@@ -75,15 +79,17 @@ GArchInstruction *x86_read_instr_int(const bin_t *data, off_t *pos, off_t len, v
* *
******************************************************************************/
-GArchInstruction *x86_read_instr_int_3(const bin_t *data, off_t *pos, off_t len, vmpa_t addr, X86Prefix prefix, const GX86Processor *proc)
+GArchInstruction *x86_read_instr_int_imm8(const bin_t *data, off_t *pos, off_t len, vmpa_t addr, X86Prefix prefix, const GX86Processor *proc)
{
GArchInstruction *result; /* Instruction à retourner */
- GArchOperand *three; /* Argument artificiel */
- result = g_x86_instruction_new(XOP_INT_3);
+ result = g_x86_instruction_new(XOP_INT);
- three = g_imm_operand_new_from_value(AOS_8_BITS, 3);
- g_arch_instruction_attach_one_operand(result, three);
+ if (!x86_read_one_operand(result, data, pos, len, X86_OTP_IMM8))
+ {
+ /* TODO free(result);*/
+ return NULL;
+ }
return result;
diff --git a/src/arch/x86/opcodes.h b/src/arch/x86/opcodes.h
index 212d1bc..f0bbc17 100644
--- a/src/arch/x86/opcodes.h
+++ b/src/arch/x86/opcodes.h
@@ -111,12 +111,12 @@ GArchInstruction *x86_read_instr_hlt(const bin_t *, off_t *, off_t, vmpa_t, X86P
/* Décode une instruction de type 'inc' (16 ou 32 bits). */
GArchInstruction *x86_read_instr_inc_r1632(const bin_t *, off_t *, off_t, vmpa_t, X86Prefix, const GX86Processor *);
-/* Décode une instruction de type 'int'. */
-GArchInstruction *x86_read_instr_int(const bin_t *, off_t *, off_t, vmpa_t, X86Prefix, const GX86Processor *);
-
/* Décode une instruction de type 'int 3'. */
GArchInstruction *x86_read_instr_int_3(const bin_t *, off_t *, off_t, vmpa_t, X86Prefix, const GX86Processor *);
+/* Décode une instruction de type 'int'. */
+GArchInstruction *x86_read_instr_int_imm8(const bin_t *, off_t *, off_t, vmpa_t, X86Prefix, const GX86Processor *);
+
/* Décode une instruction de type 'ja' (saut 8b si supérieur). */
GArchInstruction *x86_read_instr_ja_rel8(const bin_t *, off_t *, off_t, vmpa_t, X86Prefix, const GX86Processor *);
diff --git a/src/arch/x86/operand.c b/src/arch/x86/operand.c
index 1424b3e..bb152f8 100644
--- a/src/arch/x86/operand.c
+++ b/src/arch/x86/operand.c
@@ -514,7 +514,10 @@ GArchOperand *g_x86_mod_rm_operand_new(const bin_t *data, off_t *pos, off_t len,
/* Vieille astuce de l'emplacement mémoire fixe ? */
if (is_x86_register_base_pointer(reg) && mod == 0x00)
+ {
+ free_x86_register(reg);
return g_imm_operand_new_from_data(MDS_32_BITS/* FIXME */, data, pos, len, SRE_LITTLE);
+ }
result = g_object_new(G_TYPE_X86_MOD_RM_OPERAND, NULL);
@@ -527,14 +530,14 @@ GArchOperand *g_x86_mod_rm_operand_new(const bin_t *data, off_t *pos, off_t len,
if (result->base == NULL) goto gxmron_error;
result->index = get_x86_register(size, (data[*pos] & 0x38) >> 3);
- if (result->base == NULL) goto gxmron_error;
+ if (result->index == NULL) goto gxmron_error;
result->scale = ((data[*pos] & 0xc0) >> 6);
if (is_x86_register_stack_pointer(result->index))
{
+ free_x86_register(result->index);
result->index = result->base;
- free_x86_register(result->base);
result->base = NULL;
}
diff --git a/src/arch/x86/processor.c b/src/arch/x86/processor.c
index 82b0f23..5bf6d9f 100644
--- a/src/arch/x86/processor.c
+++ b/src/arch/x86/processor.c
@@ -651,7 +651,7 @@ static GArchInstruction *g_x86_processor_decode_instruction(const GX86Processor
break;
case XOP_INT:
- result = x86_read_instr_int(data, pos, len, addr, prefix, proc);
+ result = x86_read_instr_int_imm8(data, pos, len, addr, prefix, proc);
break;
generated by cgit v0.11.2-87-g4458 at 2024-05-13 00:01:04 (GMT)