** Package changed: linux (Ubuntu) => qemu (Ubuntu)
** Also affects: ubuntu-z-systems
Importance: Undecided
Status: New
** Changed in: ubuntu-z-systems
Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team)
** Changed in: qemu (Ubuntu)
Assignee: Skipper Bug Screeners (skipper-screen-team) => (unassigned)
** Changed in: ubuntu-z-systems
Importance: Undecided => High
** Changed in: ubuntu-z-systems
Status: New => Triaged
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https://bugs.launchpad.net/bugs/2046439
Title:
Wrong code execution of s390x code with qemu TCG
Status in Ubuntu on IBM z Systems:
Triaged
Status in qemu package in Ubuntu:
New
Bug description:
---Problem Description---
Wrong code execution with qemu
---Steps to Reproduce---
please have a look at the following bug:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112986
------------------------------------------------------------------------
Contact Information = Andreas Krebbel <[email protected]>
Machine Type = IBM Z
Userspace tool common name: qemu
The userspace tool has the following bit modes: 64 bit
Userspace deb: - 1:6.2+dfsg-2ubuntu6.15
------------------------------------------------------------------------
Frequently used s390x code sequences are wrongly executed when running with
qemu instruction set emulation.
The problem has been fixed in upstream qemu already. A backport for
qemu 7 branch has been committed as well. The qemu 6.2.0 version used
in Ubuntu 22.04 needs a backport of a trivial fix to work properly:
From the GCC BZ:
Problem fixed in v8.0.0
(https://gitlab.com/qemu-project/qemu/-/commit/54fce97cfcaf5463ee5f325bc1f1d4adc2772f38).
The fix was backported to v7.2.2
(https://gitlab.com/qemu-project/qemu/-/commit/17b032c6598ea756889f25e8d3e4cd9f2036669b),
but not to v6.
Please consider picking up
https://gitlab.com/qemu-project/qemu/-/commit/17b032c6598ea756889f25e8d3e4cd9f2036669b
for the Ubuntu 22.04 qemu package 1:6.2+dfsg-2ubuntu6.15
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