[Bug dynamic-link/30183] New: x86 bug about glibc.cpu.hwcaps processing in ld.so

[Bug dynamic-link/30183] New: x86 bug about glibc.cpu.hwcaps processing in ld.so

[caiyinyu at loongson dot cn]

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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[Bug dynamic-link/30183] x86 bug about glibc.cpu.hwcaps processing in ld.so

[adhemerval.zanella at linaro dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30183

Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|---                         |2.38
                 CC|                            |adhemerval.zanella at linaro dot o
                   |                            |rg

--- Comment #1 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
Fixed on 2.38 (4c721f24fc190d1dc935eb0bab283de7cf13182e).

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