From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <sourceware-bugzilla@sourceware.org>
Received: by sourceware.org (Postfix, from userid 48)
	id A10B83857BB2; Wed,  1 Mar 2023 09:03:50 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A10B83857BB2
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org;
	s=default; t=1677661430;
	bh=Fbo5YKDmL3BQb5VdfOS1NsiYLRnUvJyRpVogWLAp6Xg=;
	h=From:To:Subject:Date:From;
	b=V0kdnFeTOZXHtWjf2diIaFbGe8TZiLOwwliQVWx2TX7jxiS58cFgmxopIfrzHymMj
	 SQutP5Ka38YdI03RouQg5Dz1nRNo8XY2tcBQj+XAVRKNd1mz4tmni9StF+dbEI3Ipt
	 6F/BOppqXvUpCbvL4oGrLJt7VBBxF/XisEAZc8QQ=
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
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: glibc
X-Bugzilla-Component: dynamic-link
X-Bugzilla-Version: 2.37
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: caiyinyu at loongson dot cn
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
Message-ID: <bug-30183-131@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <glibc-bugs.sourceware.org>

https://sourceware.org/bugzilla/show_bug.cgi?id=3D30183

            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=3Dglibc.cpu.hwcaps=3D-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=3Den_US.UTF-8
    p -- LC_NUMERIC=3DC
    ...

    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

--=20
You are receiving this mail because:
You are on the CC list for the bug.=