/* ----------------------------------------------------------------------------- * 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; } }