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[Heinrich Schuchardt <2123828@xxxxxxxxxxxxxxxxxx>]

ad 2) It depends on the emulated CPU if unaligned access is allowed. OpenSBI or the Linux kernel can emulate unaligned access. QEMU would cause an exception if unaligned access is disallowed.
ad 3) CodeThink is working on big-endian support (https://gitlab.com/CodethinkLabs/qemu/-/tree/bjdooks/cva6-dev?ref_type=heads) but this seems not to be fully merged yet. Anyway the default would be little-endian.

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

Title:
  unsupported version 256 of Verdef record when running qemu-riscv64 on
  s390x

Status in glibc package in Ubuntu:
  New
Status in qemu package in Ubuntu:
  New

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.

  """
  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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