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[Launchpad Bug Tracker <2123828@xxxxxxxxxxxxxxxxxx>]

** Merge proposal linked:
   https://code.launchpad.net/~vhaudiquet/ubuntu/+source/qemu/+git/qemu/+merge/493437

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https://bugs.launchpad.net/bugs/2123828

Title:
  RISC-V: incorrect emulation of load and store on big-endian systems

Status in QEMU:
  New
Status in gcc-15 package in Ubuntu:
  Invalid
Status in glibc package in Ubuntu:
  Invalid
Status in qemu package in Ubuntu:
  Confirmed

Bug description:
  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
  """

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