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Added the "dec" instruction

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This commit is contained in:
Pierre Pronchery 2011-04-17 13:55:11 +00:00
parent 86dc27e426
commit 9bb7847caf
3 changed files with 61 additions and 3 deletions
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1
src/arch/i386.h
View File

@ -79,6 +79,7 @@ static int _write_dregister(ArchPlugin * plugin, uint32_t * i,
idefinition = AO_IMMEDIATE(0, 0, 8);
memset(&ioperand, 0, sizeof(ioperand));
ioperand.type = AOT_IMMEDIATE;
/* FIXME some combinations of register values are illegal */
ioperand.value.immediate.value = ar->id;
if(AO_GET_FLAGS(definition) & AOF_I386_MODRM
&& AO_GET_VALUE(definition) == 8) /* mod r/m, /r */

46
src/arch/i386.ins
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@ -19,9 +19,23 @@
#if defined(ARCH_i386_real) /* i386 in real mode */
# define W 16
# define REG_AX_id REG_ax_id
# define REG_CX_id REG_cx_id
# define REG_DX_id REG_dx_id
# define REG_BX_id REG_bx_id
# define REG_SP_id REG_sp_id
# define REG_BP_id REG_bp_id
# define REG_SI_id REG_si_id
# define REG_DI_id REG_di_id
#else /* i386 and compatible in 32-bit protected mode */
# define W 32
# define REG_AX_id REG_eax_id
# define REG_CX_id REG_ecx_id
# define REG_DX_id REG_edx_id
# define REG_BX_id REG_ebx_id
# define REG_SP_id REG_esp_id
# define REG_BP_id REG_ebp_id
# define REG_SI_id REG_esi_id
# define REG_DI_id REG_edi_id
#endif
@ -36,6 +50,13 @@
#define OP_RW AO_REGISTER(0, W, 0)
#define OP_al AO_REGISTER(AOF_IMPLICIT, REG_al_size, REG_al_id)
#define OP_AX AO_REGISTER(AOF_IMPLICIT, W, REG_AX_id)
#define OP_CX AO_REGISTER(AOF_IMPLICIT, W, REG_CX_id)
#define OP_DX AO_REGISTER(AOF_IMPLICIT, W, REG_DX_id)
#define OP_BX AO_REGISTER(AOF_IMPLICIT, W, REG_BX_id)
#define OP_SP AO_REGISTER(AOF_IMPLICIT, W, REG_SP_id)
#define OP_BP AO_REGISTER(AOF_IMPLICIT, W, REG_BP_id)
#define OP_SI AO_REGISTER(AOF_IMPLICIT, W, REG_SI_id)
#define OP_DI AO_REGISTER(AOF_IMPLICIT, W, REG_DI_id)
#define OP_eax AO_REGISTER(AOF_IMPLICIT, 32, REG_eax_id)
#define OP_ecx AO_REGISTER(AOF_IMPLICIT, 32, REG_ecx_id)
#define OP_edx AO_REGISTER(AOF_IMPLICIT, 32, REG_edx_id)
@ -297,15 +318,34 @@
/* CDQ 0x99 1 */
{ "cdq", 0x99, OP1F, AOT_NONE, AOT_NONE, AOT_NONE },
#endif
/* DIV 0xf6 /6 1 r/m8 */
/* DEC 0x48 +rd 1 */
{ "dec", 0x48, OP1F, OP_AX, AOT_NONE, AOT_NONE },
{ "dec", 0x49, OP1F, OP_CX, AOT_NONE, AOT_NONE },
{ "dec", 0x4a, OP1F, OP_DX, AOT_NONE, AOT_NONE },
{ "dec", 0x4b, OP1F, OP_BX, AOT_NONE, AOT_NONE },
{ "dec", 0x4c, OP1F, OP_SP, AOT_NONE, AOT_NONE },
{ "dec", 0x4d, OP1F, OP_BP, AOT_NONE, AOT_NONE },
{ "dec", 0x4e, OP1F, OP_SI, AOT_NONE, AOT_NONE },
{ "dec", 0x4f, OP1F, OP_DI, AOT_NONE, AOT_NONE },
/* DEC 0xfe /1 1 r/m8 */
{ "decb", 0xfe, OP1F, OP_RM8_D0+1,AOT_NONE, AOT_NONE },
{ "decb", 0xfe, OP1F, OP_RM8_D8+1,AOT_NONE, AOT_NONE },
{ "decb", 0xfe, OP1F, OP_RM8_DW+1,AOT_NONE, AOT_NONE },
{ "dec", 0xfe, OP1F, OP_RM8_R8+1,AOT_NONE, AOT_NONE },
/* DEC 0xff /1 1 r/mW */
{ "dec", 0xff, OP1F, OP_RMW_D0+1,AOT_NONE, AOT_NONE },
{ "dec", 0xff, OP1F, OP_RMW_D8+1,AOT_NONE, AOT_NONE },
{ "dec", 0xff, OP1F, OP_RMW_DW+1,AOT_NONE, AOT_NONE },
{ "dec", 0xff, OP1F, OP_RMW_RW+1,AOT_NONE, AOT_NONE },
/* DIV 0xf6 /6 1 r/m8 */
{ "divb", 0xf6, OP1F, OP_RM8_D0+6,AOT_NONE, AOT_NONE },
{ "divb", 0xf6, OP1F, OP_RM8_D8+6,AOT_NONE, AOT_NONE },
{ "divb", 0xf6, OP1F, OP_RM8_DW+6,AOT_NONE, AOT_NONE },
{ "div", 0xf6, OP1F, OP_RM8_R8+6,AOT_NONE, AOT_NONE },
/* DIV 0xf7 /6 1 r/mW */
/* DIV 0xf7 /6 1 r/mW */
{ "div", 0xf7, OP1F, OP_RMW_D0+6,AOT_NONE, AOT_NONE },
{ "div", 0xf7, OP1F, OP_RMW_D8+6,AOT_NONE, AOT_NONE },
{ "div", 0xf7, OP1F, OP_RMW_DW+6,AOT_NONE, AOT_NONE },
{ "div", 0xf7, OP1F, OP_RMW_RW+6,AOT_NONE, AOT_NONE },
/* NOP */
/* NOP 0x90 1 */
{ "nop", 0x90, OP1F, AOT_NONE, AOT_NONE, AOT_NONE },

17
test/i386.S
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@ -82,6 +82,23 @@
cmc /* f5 */
cpuid /* 0f a2 */
cdq /* 0x99 */
/* DEC */
dec %eax /* 48 */
dec %ecx /* 49 */
dec %edx /* 4a */
dec %ebx /* 4b */
dec %esp /* 4c */
dec %ebp /* 4d */
dec %esi /* 4e */
dec %edi /* 4f */
decb [%eax] /* fe 08 */
decb [%ecx] /* fe 09 */
decb [%edx] /* fe 0a */
decb [%ebx] /* fe 0b */
dec [%eax] /* ff 08 */
dec [%ecx] /* ff 09 */
dec [%edx] /* ff 0a */
dec [%ebx] /* ff 0b */
/* DIV */
divb [%ecx] /* f6 31 */
divb [%eax + $0x02] /* f6 70 02 */