#16780 closed defect (invalid)

IEM IRET with VME cause #GP with TF set

Reported by:	Yuhong Bao	Owned by:
Component:	VMM	Version:	VirtualBox 5.1.22
Keywords:		Cc:
Guest type:	other	Host type:	other

Description (last modified by Frank Mehnert)

From https://www.virtualbox.org/svn/vbox/trunk/src/VBox/VMM/VMMAll/IEMAllCImpl.cpp.h :

        else if (   enmEffOpSize == IEMMODE_16BIT
                 && (   !(uNewFlags & X86_EFL_IF)
                     || !Efl.Bits.u1VIP )
                 && !(uNewFlags & X86_EFL_TF)   )

I don't remember IRET with TF set causing GP faults with VME, unlike POPF. This is documented in http://www.rcollins.org/ddj/May98/May98.html

Change History (3)

comment:1 by Yuhong Bao, 8 years ago

Actually, please close this ticket. I think the article is in error.

comment:2 by Frank Mehnert, 8 years ago

Description:	modified (diff)

comment:3 by Frank Mehnert, 8 years ago

Resolution:	→ invalid
Status:	new → closed

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