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id = 1248
title = "s390x: glibc widestring algorithms broken"
state = "closed"
created_at = "2022-10-10T18:47:41.188Z"
closed_at = "2022-11-04T13:37:57.063Z"
labels = ["accel: TCG", "target: s390x", "workflow::Patch available"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/1248"
host-os = "ArchLinux"
host-arch = "x86_64"
qemu-version = "qemu-s390x version 7.1.0"
guest-os = "user emulation"
guest-arch = "s390x"
description = """Several wide-string functions from glibc are broken und qemu user emulation.
Affected are at least: `wcsbrk()`, `wcsspn()` and `wcscspn()`. All of these are implemented in optimized assembler in glibc.
Unfortunately I don't have access to the real hardware to check the behavior there. But it would probably been detected by now.
Also I don't know which instructions exactly don't work, as I don't have any knowledge about s390x assembler."""
reproduce = """1. Compile the test program above
2. Run the program
3. Output is `0`, should be `1`."""
additional = "n/a"
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