- When accessing memory using ESP, make the SS segment default.
- The INT instructions always pushes 16-bit values in real mode, regardless
of the operand/address size attributes.
svn path=/branches/ntvdm/; revision=61000
if (!Fast486StackPush(State, OldEsp)) return FALSE;
}
}
+ else
+ {
+ if (State->SegmentRegs[FAST486_REG_CS].Size)
+ {
+ /* Set OPSIZE, because INT always pushes 16-bit values in real mode */
+ State->PrefixFlags |= FAST486_PREFIX_OPSIZE;
+ }
+ }
/* Push EFLAGS */
if (!Fast486StackPush(State, State->Flags.Long)) return FALSE;
}
}
+ if ((SibByte & 0x07) == FAST486_REG_ESP)
+ {
+ /* Check if there is no segment override */
+ if (!(State->PrefixFlags & FAST486_PREFIX_SEG))
+ {
+ /* Add a SS: prefix */
+ State->PrefixFlags |= FAST486_PREFIX_SEG;
+ State->SegmentOverride = FAST486_REG_SS;
+ }
+ }
+
/* Calculate the address */
ModRegRm->MemoryAddress = Base + Index * Scale;
}