* [Qemu-devel] [Bug 996798] [NEW] Incorrect order of task switching
@ 2012-05-08 21:55 Юрий Попов
2012-05-09 5:17 ` [Qemu-devel] [Bug 996798] " Yury Popov
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: Юрий Попов @ 2012-05-08 21:55 UTC (permalink / raw)
To: qemu-devel
Public bug reported:
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.
…
11. Loads the task register with the segment selector and descriptor
for the new task's TSS.
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.
** Affects: qemu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/996798
Title:
Incorrect order of task switching
Status in QEMU:
New
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.
…
11. Loads the task register with the segment selector and
descriptor for the new task's TSS.
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/996798/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Qemu-devel] [Bug 996798] Re: Incorrect order of task switching
2012-05-08 21:55 [Qemu-devel] [Bug 996798] [NEW] Incorrect order of task switching Юрий Попов
@ 2012-05-09 5:17 ` Yury Popov
2012-05-09 12:58 ` Yury Popov
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Yury Popov @ 2012-05-09 5:17 UTC (permalink / raw)
To: qemu-devel
** Description changed:
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
+ 8. Saves the state of the current (old) task in the current task’s
TSS.
…
- 11. Loads the task register with the segment selector and descriptor
- for the new 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.
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/996798
Title:
Incorrect order of task switching
Status in QEMU:
New
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/996798/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Qemu-devel] [Bug 996798] Re: Incorrect order of task switching
2012-05-08 21:55 [Qemu-devel] [Bug 996798] [NEW] Incorrect order of task switching Юрий Попов
2012-05-09 5:17 ` [Qemu-devel] [Bug 996798] " Yury Popov
@ 2012-05-09 12:58 ` Yury Popov
2017-05-01 13:24 ` Thomas Huth
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Yury Popov @ 2012-05-09 12:58 UTC (permalink / raw)
To: qemu-devel
Some bug in VirtualBox: https://www.virtualbox.org/ticket/10532
** Bug watch added: Virtualbox Trac #10532
http://www.virtualbox.org/ticket/10532
--
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/996798
Title:
Incorrect order of task switching
Status in QEMU:
New
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/996798/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Qemu-devel] [Bug 996798] Re: Incorrect order of task switching
2012-05-08 21:55 [Qemu-devel] [Bug 996798] [NEW] Incorrect order of task switching Юрий Попов
2012-05-09 5:17 ` [Qemu-devel] [Bug 996798] " Yury Popov
2012-05-09 12:58 ` Yury Popov
@ 2017-05-01 13:24 ` Thomas Huth
2017-09-13 8:48 ` Thomas Huth
2017-11-13 4:17 ` Launchpad Bug Tracker
4 siblings, 0 replies; 6+ messages in thread
From: Thomas Huth @ 2017-05-01 13:24 UTC (permalink / raw)
To: qemu-devel
Is problem still reproducable with the latest version of QEMU, or has it
been fixed nowadays?
** Changed in: qemu
Status: New => Incomplete
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/996798
Title:
Incorrect order of task switching
Status in QEMU:
Incomplete
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/996798/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Qemu-devel] [Bug 996798] Re: Incorrect order of task switching
2012-05-08 21:55 [Qemu-devel] [Bug 996798] [NEW] Incorrect order of task switching Юрий Попов
` (2 preceding siblings ...)
2017-05-01 13:24 ` Thomas Huth
@ 2017-09-13 8:48 ` Thomas Huth
2017-11-13 4:17 ` Launchpad Bug Tracker
4 siblings, 0 replies; 6+ messages in thread
From: Thomas Huth @ 2017-09-13 8:48 UTC (permalink / raw)
To: qemu-devel
** Bug watch removed: Virtualbox Trac #10532
http://www.virtualbox.org/ticket/10532
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/996798
Title:
Incorrect order of task switching
Status in QEMU:
Incomplete
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/996798/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Qemu-devel] [Bug 996798] Re: Incorrect order of task switching
2012-05-08 21:55 [Qemu-devel] [Bug 996798] [NEW] Incorrect order of task switching Юрий Попов
` (3 preceding siblings ...)
2017-09-13 8:48 ` Thomas Huth
@ 2017-11-13 4:17 ` Launchpad Bug Tracker
4 siblings, 0 replies; 6+ messages in thread
From: Launchpad Bug Tracker @ 2017-11-13 4:17 UTC (permalink / raw)
To: qemu-devel
[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/996798
Title:
Incorrect order of task switching
Status in QEMU:
Expired
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/996798/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2017-11-13 4:30 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-05-08 21:55 [Qemu-devel] [Bug 996798] [NEW] Incorrect order of task switching Юрий Попов
2012-05-09 5:17 ` [Qemu-devel] [Bug 996798] " Yury Popov
2012-05-09 12:58 ` Yury Popov
2017-05-01 13:24 ` Thomas Huth
2017-09-13 8:48 ` Thomas Huth
2017-11-13 4:17 ` Launchpad Bug Tracker
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