/* 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 */