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[Heinrich Schuchardt <2123828@xxxxxxxxxxxxxxxxxx>]

Here is the endian-mess. QEMU has:

static bool trans_lhu(DisasContext *ctx, arg_lhu *a)
{
    return gen_load(ctx, a, MO_TEUW);
}

and

static bool trans_c_lhu(DisasContext *ctx, arg_c_lhu *a) 
{
    REQUIRE_ZCB(ctx);
    return gen_load(ctx, a, MO_UW);
}

MO_TEUW  = MO_TE | MO_UW
MO_UW    = MO_16

For target endianness differing from host endianness: MO_TE = MO_BSWAP.

This cannot be correct. Both the compressed instruction and the non-
compressed instruction should consider the host endianness.


** Changed in: qemu (Ubuntu)
       Status: New => Confirmed

** Changed in: glibc (Ubuntu)
       Status: New => Invalid

** Changed in: gcc-15 (Ubuntu)
       Status: New => Invalid

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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 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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