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/* udis86 - libudis86/syn-intel.c
*
* Copyright (c) 2002-2013 Vivek Thampi
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "types.h"
#include "extern.h"
#include "decode.h"
#include "itab.h"
#include "syn.h"
#include "udint.h"
/* -----------------------------------------------------------------------------
* opr_cast() - Prints an operand cast.
* -----------------------------------------------------------------------------
*/
static void
opr_cast(struct ud* u, struct ud_operand* op)
{
if (u->br_far) {
ud_asmprintf(u, "far ");
}
switch(op->size) {
case 8: ud_asmprintf(u, "byte " ); break;
case 16: ud_asmprintf(u, "word " ); break;
case 32: ud_asmprintf(u, "dword "); break;
case 64: ud_asmprintf(u, "qword "); break;
case 80: ud_asmprintf(u, "tword "); break;
case 128: ud_asmprintf(u, "oword "); break;
case 256: ud_asmprintf(u, "yword "); break;
default: break;
}
}
/* -----------------------------------------------------------------------------
* 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:
ud_asmprintf(u, "%s", ud_reg_tab[op->base - UD_R_AL]);
break;
case UD_OP_MEM:
if (syn_cast) {
opr_cast(u, op);
}
ud_asmprintf(u, "[");
if (u->pfx_seg) {
ud_asmprintf(u, "%s:", ud_reg_tab[u->pfx_seg - UD_R_AL]);
}
if (op->base) {
ud_asmprintf(u, "%s", ud_reg_tab[op->base - UD_R_AL]);
}
if (op->index) {
ud_asmprintf(u, "%s%s", op->base != UD_NONE? "+" : "",
ud_reg_tab[op->index - UD_R_AL]);
if (op->scale) {
ud_asmprintf(u, "*%d", op->scale);
}
}
if (op->offset != 0) {
ud_syn_print_mem_disp(u, op, (op->base != UD_NONE ||
op->index != UD_NONE) ? 1 : 0);
}
ud_asmprintf(u, "]");
break;
case UD_OP_IMM:
ud_syn_print_imm(u, op);
break;
case UD_OP_JIMM:
ud_syn_print_addr(u, ud_syn_rel_target(u, op));
break;
case UD_OP_PTR:
switch (op->size) {
case 32:
ud_asmprintf(u, "word 0x%x:0x%x", op->lval.ptr.seg,
op->lval.ptr.off & 0xFFFF);
break;
case 48:
ud_asmprintf(u, "dword 0x%x:0x%x", op->lval.ptr.seg,
op->lval.ptr.off);
break;
}
break;
case UD_OP_CONST:
if (syn_cast) opr_cast(u, op);
ud_asmprintf(u, "%d", op->lval.udword);
break;
default: return;
}
}
/* =============================================================================
* translates to intel syntax
* =============================================================================
*/
extern void
ud_translate_intel(struct ud* u)
{
/* check if P_OSO prefix is used */
if (!P_OSO(u->itab_entry->prefix) && u->pfx_opr) {
switch (u->dis_mode) {
case 16: ud_asmprintf(u, "o32 "); break;
case 32:
case 64: ud_asmprintf(u, "o16 "); break;
}
}
/* check if P_ASO prefix was used */
if (!P_ASO(u->itab_entry->prefix) && u->pfx_adr) {
switch (u->dis_mode) {
case 16: ud_asmprintf(u, "a32 "); break;
case 32: ud_asmprintf(u, "a16 "); break;
case 64: ud_asmprintf(u, "a32 "); break;
}
}
if (u->pfx_seg &&
u->operand[0].type != UD_OP_MEM &&
u->operand[1].type != UD_OP_MEM ) {
ud_asmprintf(u, "%s ", ud_reg_tab[u->pfx_seg - UD_R_AL]);
}
if (u->pfx_lock) {
ud_asmprintf(u, "lock ");
}
if (u->pfx_rep) {
ud_asmprintf(u, "rep ");
} else if (u->pfx_repe) {
ud_asmprintf(u, "repe ");
} else if (u->pfx_repne) {
ud_asmprintf(u, "repne ");
}
/* print the instruction mnemonic */
ud_asmprintf(u, "%s", ud_lookup_mnemonic(u->mnemonic));
if (u->operand[0].type != UD_NONE) {
int cast = 0;
ud_asmprintf(u, " ");
if (u->operand[0].type == UD_OP_MEM) {
if (u->operand[1].type == UD_OP_IMM ||
u->operand[1].type == UD_OP_CONST ||
u->operand[1].type == UD_NONE ||
(u->operand[0].size != u->operand[1].size)) {
cast = 1;
} else if (u->operand[1].type == UD_OP_REG &&
u->operand[1].base == UD_R_CL) {
switch (u->mnemonic) {
case UD_Ircl:
case UD_Irol:
case UD_Iror:
case UD_Ircr:
case UD_Ishl:
case UD_Ishr:
case UD_Isar:
cast = 1;
break;
default: break;
}
}
}
gen_operand(u, &u->operand[0], cast);
}
if (u->operand[1].type != UD_NONE) {
int cast = 0;
ud_asmprintf(u, ", ");
if (u->operand[1].type == UD_OP_MEM &&
u->operand[0].size != u->operand[1].size &&
!ud_opr_is_sreg(&u->operand[0])) {
cast = 1;
}
gen_operand(u, &u->operand[1], cast);
}
if (u->operand[2].type != UD_NONE) {
int cast = 0;
ud_asmprintf(u, ", ");
if (u->operand[2].type == UD_OP_MEM &&
u->operand[2].size != u->operand[1].size) {
cast = 1;
}
gen_operand(u, &u->operand[2], cast);
}
if (u->operand[3].type != UD_NONE) {
ud_asmprintf(u, ", ");
gen_operand(u, &u->operand[3], 0);
}
}
/*
vim: set ts=2 sw=2 expandtab
*/
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