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authorCyrille Bagard <nocbos@gmail.com>2008-08-03 15:35:43 (GMT)
committerCyrille Bagard <nocbos@gmail.com>2008-08-03 15:35:43 (GMT)
commit1249cf6e2c0ed87e1c593e488beedbbfe153ff00 (patch)
tree0a92b85df9dabe76b34810071e0c1def906311da /src/arch/x86/op_mov.c
parentf0b80c6ab55ede4f8ab8ede757f1f8951512affa (diff)
Read registers from the ModR/M encoding.
git-svn-id: svn://svn.gna.org/svn/chrysalide/trunk@13 abbe820e-26c8-41b2-8c08-b7b2b41f8b0a
Diffstat (limited to 'src/arch/x86/op_mov.c')
-rw-r--r--src/arch/x86/op_mov.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/src/arch/x86/op_mov.c b/src/arch/x86/op_mov.c
index e14a2f7..f0a5fce 100644
--- a/src/arch/x86/op_mov.c
+++ b/src/arch/x86/op_mov.c
@@ -46,6 +46,73 @@
* *
******************************************************************************/
+asm_x86_instr *read_instr_mov_with_reg1632(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 *reg2; /* Registre de source */
+ asm_x86_operand *reg1; /* Registre de destination */
+
+ 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)++];
+
+ /* TODO ! */
+ if ((data[*pos] & 0xc0) != 0xc0)
+ return NULL;
+
+ reg1 = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, true);
+ if (reg1 == NULL)
+ {
+ free(result);
+ return NULL;
+ }
+
+ reg2 = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, false);
+ if (reg2 == NULL)
+ {
+ free(result);
+ free(reg1);
+ return NULL;
+ }
+
+ (*pos)++;
+
+ 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;
+
+}
+
+
+/******************************************************************************
+* *
+* 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 'mov' (16 ou 32 bits). *
+* *
+* Retour : Instruction mise en place ou NULL. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
asm_x86_instr *read_instr_mov_to_1632(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 */