Changeset 2878 in vbox for trunk/src/VBox/VMM/VMMAll

Timestamp:

May 25, 2007 3:26:24 PM (18 years ago)

Author:

vboxsync

Message:

Only take the lower 16 bits from ecx when in real or v86 mode.

File:

• trunk/src/VBox/VMM/VMMAll/IOMAllMMIO.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/VMMAll/IOMAllMMIO.cpp

@@ -1627 +1627 @@
     {
         cTransfers = pRegFrame->ecx;
+
+        if (    CPUMIsGuestInRealMode(pVM)
+            ||  eflags.Bits.u1VM)
+            cTransfers &= 0xffff;
+
         if (!cTransfers)
             return VINF_SUCCESS;
@@ -1776 +1781 @@
     {
         cTransfers = pRegFrame->ecx;
+        if (    CPUMIsGuestInRealMode(pVM)
+            ||  eflags.Bits.u1VM)
+            cTransfers &= 0xffff;
+
         if (!cTransfers)
             return VINF_SUCCESS;