QEMU

Incorrect order of task switching

Bug #996798 reported by Yury Popov on 2012-05-08
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
​ QEMU
Expired
Undecided
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Bug Description

In Intel specifications (http://download.intel.com/design/processor/manuals/253668.pdf 7.3), we can see:

    8. Saves the state of the current (old) task in the current task’s TSS.

…

   12. The TSS state is loaded into the processor

But, in QEMU code (https://raw.github.com/qemu/QEMU/v1.0/target-i386/op_helper.c :375), the order is reversed: TSS registers & segments loads BEFORE save old task state.

See original description
Yury Popov (8-phoenix) on 2012-05-09
description: updated
Yury Popov (8-phoenix) wrote :

Some bug in VirtualBox: https://www.virtualbox.org/ticket/10532

Thomas Huth (th-huth) wrote :

Is problem still reproducable with the latest version of QEMU, or has it been fixed nowadays?

Changed in qemu:
status: New → Incomplete
Thomas Huth (th-huth) on 2017-09-13
Changed in qemu:
status: Incomplete → New
status: New → Incomplete
Launchpad Janitor (janitor) wrote :

[Expired for QEMU because there has been no activity for 60 days.]

Changed in qemu:
status: Incomplete → Expired
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