** Description changed:
+ [ Impact ]
+
+ On s390x architecture, qemu cannot emulate riscv64 well because of an
+ endianess error. Original bug report :
+
QEMU's DEP-8 test fails on s390x, due to warning output on stderr about
"unsupported version 256 of Verdef record", which is blocking migration
of glibc 2.42-0ubuntu3.
-
- Minimal reproducer:
- ```
- ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ sudo apt update && sudo
apt install qemu-user
- ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ dpkg -l | grep libc6
- ii libc6:s390x 2.42-0ubuntu3
- ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ dpkg -l | grep qemu-user
- ii qemu-user 1:10.1.0+ds-5ubuntu1
- ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ dpkg --print-architecture
- s390x
- ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ sudo dpkg
--add-architecture riscv64
- ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ sudo apt update
- ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ sudo apt install
hello:riscv64
- ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ /usr/bin/qemu-riscv64
/usr/bin/hello
- /usr/bin/hello: /lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256 of
Verdef record
- /usr/bin/hello: /lib/riscv64-linux-gnu/libc.so.6: unsupported version 256 of
Verdef record
- /usr/bin/hello: /lib/riscv64-linux-gnu/libc.so.6: unsupported version 256 of
Verdef record
- /usr/bin/hello: /lib/riscv64-linux-gnu/libc.so.6: unsupported version 256 of
Verdef record
- /usr/bin/hello: /lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256 of
Verdef record
- /usr/bin/hello: /lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256 of
Verdef record
- /usr/bin/hello: /lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256 of
Verdef record
- ```
DEP-8 logs:
"""
323s === Checking if /usr/bin/qemu-riscv64 can run executables:
323s glob with sh: /usr/bin/qemu-riscv64 /bin/busybox ash -c
"/usr/bin/qemu-riscv64 /bin/busybox ls -dCFl debian/*[t]*":
323s /bin/busybox: /lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256
of Verdef record
323s /bin/busybox: /lib/riscv64-linux-gnu/libresolv.so.2: unsupported version
256 of Verdef record
323s /bin/busybox: /lib/riscv64-linux-gnu/libc.so.6: unsupported version 256
of Verdef record
323s /bin/busybox: /lib/riscv64-linux-gnu/libc.so.6: unsupported version 256
of Verdef record
323s /bin/busybox: /lib/riscv64-linux-gnu/libc.so.6: unsupported version 256
of Verdef record
323s /bin/busybox: /lib/riscv64-linux-gnu/libc.so.6: unsupported version 256
of Verdef record
323s /bin/busybox: /lib/riscv64-linux-gnu/libc.so.6: unsupported version 256
of Verdef record
323s /bin/busybox: /lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256
of Verdef record
323s
323s Reading package lists.../bin/busybox: /lib/riscv64-linux-gnu/libc.so.6:
unsupported version 256 of Verdef record
323s /bin/busybox: /lib/riscv64-linux-gnu/libc.so.6: unsupported version 256
of Verdef record
323s /bin/busybox: /lib/riscv64-linux-gnu/libc.so.6: unsupported version 256
of Verdef record
323s /bin/busybox: /lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256
of Verdef record
323s /bin/busybox: /lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256
of Verdef record
323s /bin/busybox: /lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256
of Verdef record
323s Expected output not found
[...]
328s autopkgtest [22:14:52]: @@@@@@@@@@@@@@@@@@@@ summary
328s test-qemu-img.sh PASS (superficial)
328s test-qemu-system.sh PASS (superficial)
328s test-qemu-user.sh FAIL stderr: /bin/busybox:
/lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256 of Verdef record
"""
+
+ Patched by flagging the faulty instructions with the endianness swap
+ marker.
+
+ [ Test Plan ]
+
+ Minimal reproducer:
+ ```
+ ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ sudo apt update && sudo
apt install qemu-user
+ ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ dpkg -l | grep libc6
+ ii libc6:s390x 2.42-0ubuntu3
+ ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ dpkg -l | grep qemu-user
+ ii qemu-user 1:10.1.0+ds-5ubuntu1
+ ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ dpkg --print-architecture
+ s390x
+ ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ sudo dpkg
--add-architecture riscv64
+ ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ sudo apt update
+ ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ sudo apt install
hello:riscv64
+ ubuntu@slyon-lp-2123828-slyon-glibc-qemu-riscv64:~$ /usr/bin/qemu-riscv64
/usr/bin/hello
+ /usr/bin/hello: /lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256 of
Verdef record
+ /usr/bin/hello: /lib/riscv64-linux-gnu/libc.so.6: unsupported version 256 of
Verdef record
+ /usr/bin/hello: /lib/riscv64-linux-gnu/libc.so.6: unsupported version 256 of
Verdef record
+ /usr/bin/hello: /lib/riscv64-linux-gnu/libc.so.6: unsupported version 256 of
Verdef record
+ /usr/bin/hello: /lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256 of
Verdef record
+ /usr/bin/hello: /lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256 of
Verdef record
+ /usr/bin/hello: /lib/ld-linux-riscv64-lp64d.so.1: unsupported version 256 of
Verdef record
+ ```
+
+ The same thing with the patch shows "Hello, world !".
+
+ [ Where problems could occur ]
+
+ This change is really small (3 lines), and only affects riscv64
+ emulation from QEMU. If the fix was entirely wrong, riscv64 emulation of
+ compressed instruction could be affected. It can be easily tested.
+
+ The patch was accepted upstream, so such tests are conducted upstream as
+ well, which reduces the amount of possible problems and work to do to
+ fix those.
+
+ [ Other Info ]
+
+ Patch sent upstream:
https://lore.kernel.org/qemu-devel/[email protected]/
+ Patch available on ppa:
https://launchpad.net/~vhaudiquet/+archive/ubuntu/qemu-fix-lp2123828/+packages
** Changed in: glibc (Ubuntu Plucky)
Status: New => Invalid
** Changed in: glibc (Ubuntu Noble)
Status: New => Invalid
** Changed in: gcc-15 (Ubuntu Plucky)
Status: New => Invalid
** Changed in: gcc-15 (Ubuntu Noble)
Status: New => Invalid
** Changed in: qemu (Ubuntu Plucky)
Assignee: (unassigned) => Valentin Haudiquet (vhaudiquet)
** Changed in: qemu (Ubuntu Noble)
Assignee: (unassigned) => Valentin Haudiquet (vhaudiquet)
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https://bugs.launchpad.net/bugs/2123828
Title:
RISC-V: incorrect emulation of load and store on big-endian systems
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