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From: "caiyinyu at loongson dot cn" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/30183] New: x86 bug about glibc.cpu.hwcaps processing in ld.so
Date: Wed, 01 Mar 2023 09:03:46 +0000 [thread overview]
Message-ID: <bug-30183-131@http.sourceware.org/bugzilla/> (raw)
https://sourceware.org/bugzilla/show_bug.cgi?id=30183
Bug ID: 30183
Summary: x86 bug about glibc.cpu.hwcaps processing in ld.so
Product: glibc
Version: 2.37
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: dynamic-link
Assignee: unassigned at sourceware dot org
Reporter: caiyinyu at loongson dot cn
Target Milestone: ---
x86: Fix bug about glibc.cpu.hwcaps.
1. export GLIBC_TUNABLES=glibc.cpu.hwcaps=-AVX512
2. Add _dl_printf("p -- %s\n", p); just before switch(nl) in
sysdeps/x86/cpu-tunables.c
3. compiled and run ./testrun.sh /usr/bin/ls
you will get:
p -- -AVX512
p -- LC_ADDRESS=en_US.UTF-8
p -- LC_NUMERIC=C
...
The function, TUNABLE_CALLBACK (set_hwcaps)
(tunable_val_t *valp), checks far more than it should and it
should stop at end of "-AVX512".
This can be fixed by the following patch.
https://sourceware.org/pipermail/libc-alpha/2023-March/145961.html
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next reply other threads:[~2023-03-01 9:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-01 9:03 caiyinyu at loongson dot cn [this message]
2024-05-01 18:08 ` [Bug dynamic-link/30183] " adhemerval.zanella at linaro dot org
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