Changeset 77898 in vbox

Timestamp:

Mar 27, 2019 6:13:31 AM (6 years ago)

Author:

vboxsync

Message:

VMM/IEM: The EXT bit of the error code must be 1 for nested exceptions when delivering a #DB using INT1 (ICEBP).

File:

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

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

@@ -4703 +4703 @@
     uint16_t uExt;
     if (   enmTaskSwitch == IEMTASKSWITCH_INT_XCPT
-        && !(fFlags & IEM_XCPT_FLAGS_T_SOFT_INT))
+        && (   !(fFlags & IEM_XCPT_FLAGS_T_SOFT_INT)
+            ||  (fFlags & IEM_XCPT_FLAGS_ICEBP_INSTR)))
     {
         uExt = 1;
@@ -4892 +4893 @@
          * See Intel Instruction reference for INT.
          */
-        uint16_t const uExt     = (fFlags & IEM_XCPT_FLAGS_T_SOFT_INT) ? 0 : 1;
+        uint16_t const uExt     = (    (fFlags & IEM_XCPT_FLAGS_T_SOFT_INT)
+                                   && !(fFlags & IEM_XCPT_FLAGS_ICEBP_INSTR)) ? 0 : 1;
         uint16_t const uSelMask = X86_SEL_MASK_OFF_RPL;
         RTSEL          SelTSS   = Idte.Gate.u16Sel;