/* -----------------------------------------------------------------------------
* gen_operand() - Generates assembly output for each operand.
* -----------------------------------------------------------------------------
*/
static void gen_operand(struct ud* u, struct ud_operand* op, int syn_cast)
{
switch(op->type) {
case UD_OP_REG:
mkasm(u, ud_reg_tab[op->base - UD_R_AL]);
break;
case UD_OP_MEM: {
int op_f = 0;
if (syn_cast)
opr_cast(u, op);
mkasm(u, "[");
if (u->pfx_seg)
mkasm(u, "%s:", ud_reg_tab[u->pfx_seg - UD_R_AL]);
if (op->base) {
mkasm(u, "%s", ud_reg_tab[op->base - UD_R_AL]);
op_f = 1;
}
if (op->index) {
if (op_f)
mkasm(u, "+");
mkasm(u, "%s", ud_reg_tab[op->index - UD_R_AL]);
op_f = 1;
}
if (op->scale)
mkasm(u, "*%d", op->scale);
if (op->offset == 8) {
if (op->lval.sbyte < 0)
mkasm(u, "-0x%x", -op->lval.sbyte);
else mkasm(u, "%s0x%x", (op_f) ? "+" : "", op->lval.sbyte);
}
else if (op->offset == 16)
mkasm(u, "%s0x%x", (op_f) ? "+" : "", op->lval.uword);
else if (op->offset == 32) {
if (u->adr_mode == 64) {
if (op->lval.sdword < 0)
mkasm(u, "-0x%x", -op->lval.sdword);
else mkasm(u, "%s0x%x", (op_f) ? "+" : "", op->lval.sdword);
}
else mkasm(u, "%s0x%lx", (op_f) ? "+" : "", op->lval.udword);
}
else if (op->offset == 64)
mkasm(u, "%s0x" FMT64 "x", (op_f) ? "+" : "", op->lval.uqword);
mkasm(u, "]");
break;
}
case UD_OP_IMM: {
int64_t imm = 0;
uint64_t sext_mask = 0xffffffffffffffffull;
unsigned sext_size = op->size;
if (syn_cast)
opr_cast(u, op);
switch (op->size) {
case 8: imm = op->lval.sbyte; break;
case 16: imm = op->lval.sword; break;
case 32: imm = op->lval.sdword; break;
case 64: imm = op->lval.sqword; break;
}
if ( P_SEXT( u->itab_entry->prefix ) ) {
sext_size = u->operand[ 0 ].size;
if ( u->mnemonic == UD_Ipush )
/* push sign-extends to operand size */
sext_size = u->opr_mode;
}
if ( sext_size < 64 )
sext_mask = ( 1ull << sext_size ) - 1;
mkasm( u, "0x" FMT64 "x", imm & sext_mask );
break;
}
case UD_OP_JIMM:
if (syn_cast) opr_cast(u, op);
switch (op->size) {
case 8:
mkasm(u, "0x" FMT64 "x", u->pc + op->lval.sbyte);
break;
case 16:
mkasm(u, "0x" FMT64 "x", ( u->pc + op->lval.sword ) & 0xffff );
break;
case 32:
mkasm(u, "0x" FMT64 "x", ( u->pc + op->lval.sdword ) & 0xfffffffful );
break;
default:break;
}
break;
case UD_OP_PTR:
switch (op->size) {
case 32:
mkasm(u, "word 0x%x:0x%x", op->lval.ptr.seg,
op->lval.ptr.off & 0xFFFF);
break;
case 48:
mkasm(u, "dword 0x%x:0x%lx", op->lval.ptr.seg,
op->lval.ptr.off);
break;
}
break;
case UD_OP_CONST:
if (syn_cast) opr_cast(u, op);
mkasm(u, "%d", op->lval.udword);
break;
default: return;
}
}
/* -----------------------------------------------------------------------------
* gen_operand() - Generates assembly output for each operand.
* -----------------------------------------------------------------------------
*/
static void
gen_operand(struct ud* u, struct ud_operand* op)
{
switch(op->type) {
case UD_OP_REG:
mkasm(u, "%%%s", ud_reg_tab[op->base - UD_R_AL]);
break;
case UD_OP_MEM:
if (u->br_far) opr_cast(u, op);
if (u->pfx_seg)
mkasm(u, "%%%s:", ud_reg_tab[u->pfx_seg - UD_R_AL]);
if (op->offset == 8) {
if (op->lval.sbyte < 0)
mkasm(u, "-0x%x", (-op->lval.sbyte) & 0xff);
else
mkasm(u, "0x%x", op->lval.sbyte);
}
else if (op->offset == 16) {
if (op->lval.sword < 0)
mkasm(u, "-0x%x", (-op->lval.sword) & 0xffff);
else
mkasm(u, "0x%x", op->lval.sword);
} else if (op->offset == 32) {
if (op->lval.sdword < 0)
mkasm(u, "-0x%x", (-op->lval.sdword) & 0xffffffff);
else
mkasm(u, "0x%x", op->lval.sdword);
} else if (op->offset == 64) {
if (op->lval.sdword < 0)
mkasm(u, "-0x" FMT64 "x", (uint64_t)-op->lval.sqword);
else
mkasm(u, "0x" FMT64 "x", (uint64_t)op->lval.sqword);
}
if (op->base)
mkasm(u, "(%%%s", ud_reg_tab[op->base - UD_R_AL]);
if (op->index) {
if (op->base)
mkasm(u, ",");
else mkasm(u, "(");
mkasm(u, "%%%s", ud_reg_tab[op->index - UD_R_AL]);
}
if (op->scale)
mkasm(u, ",%d", op->scale);
if (op->base || op->index)
mkasm(u, ")");
break;
case UD_OP_IMM: {
int64_t imm = 0;
uint64_t sext_mask = 0xffffffffffffffffull;
unsigned sext_size = op->size;
switch (op->size) {
case 8: imm = op->lval.sbyte; break;
case 16: imm = op->lval.sword; break;
case 32: imm = op->lval.sdword; break;
case 64: imm = op->lval.sqword; break;
}
if ( P_SEXT( u->itab_entry->prefix ) ) {
sext_size = u->operand[ 0 ].size;
if ( u->mnemonic == UD_Ipush )
/* push sign-extends to operand size */
sext_size = u->opr_mode;
}
if ( sext_size < 64 )
sext_mask = ( 1ull << sext_size ) - 1;
mkasm( u, "$0x" FMT64 "x", (uint64_t)(imm & sext_mask) );
break;
}
case UD_OP_JIMM:
switch (op->size) {
case 8:
mkasm(u, "0x" FMT64 "x", (uint64_t)(u->pc + op->lval.sbyte));
break;
case 16:
mkasm(u, "0x" FMT64 "x", (uint64_t)((u->pc + op->lval.sword) & 0xffff) );
break;
case 32:
if (u->dis_mode == 32)
mkasm(u, "0x" FMT64 "x", (uint64_t)((u->pc + op->lval.sdword) & 0xffffffff));
else
mkasm(u, "0x" FMT64 "x", (uint64_t)(u->pc + op->lval.sdword));
break;
default:break;
}
break;
case UD_OP_PTR:
switch (op->size) {
case 32:
mkasm(u, "$0x%x, $0x%x", op->lval.ptr.seg,
op->lval.ptr.off & 0xFFFF);
break;
case 48:
mkasm(u, "$0x%x, $0x%lx", op->lval.ptr.seg,
(unsigned long)op->lval.ptr.off);
break;
}
break;
default: return;
}
}
