KREG_EDX
gregs->kregs[KREG_EDX] = regs->r_edx;
kregs[KREG_ES], kregs[KREG_EDX], kregs[KREG_EDX]);
{ "edx", KREG_EDX, MDB_TGT_R_EXPORT },
{ "dx", KREG_EDX, MDB_TGT_R_EXPORT | MDB_TGT_R_16 },
{ "dh", KREG_EDX, MDB_TGT_R_EXPORT | MDB_TGT_R_8H },
{ "dl", KREG_EDX, MDB_TGT_R_EXPORT | MDB_TGT_R_8L },