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From: "fweimer at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/25938] ld.so.cache should store meaning of hwcap mask bits
Date: Fri, 04 Dec 2020 08:52:39 +0000 [thread overview]
Message-ID: <bug-25938-131-qEeUrFH5CV@http.sourceware.org/bugzilla/> (raw)
In-Reply-To: <bug-25938-131@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=25938
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |2.33
CC| |fweimer at redhat dot com
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at sourceware dot org |fweimer at redhat dot com
--- Comment #1 from Florian Weimer <fweimer at redhat dot com> ---
More or less fixed in glibc 2.33 by a new mechanism:
commit b44ac4f4c7a8bbe5eaa2701aa9452eaf2c96e1dd
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Dec 4 09:13:43 2020 +0100
elf: Process glibc-hwcaps subdirectories in ldconfig
Libraries from these subdirectories are added to the cache
with a special hwcap bit DL_CACHE_HWCAP_EXTENSION, so that
they are ignored by older dynamic loaders.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
commit 600d9e0c87940da9b0fdeff492bf888df852d40c
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Dec 4 09:13:43 2020 +0100
elf: Add glibc-hwcaps subdirectory support to ld.so cache processing
This recognizes the DL_CACHE_HWCAP_EXTENSION flag in cache entries,
and picks the supported cache entry with the highest priority.
The elf/tst-glibc-hwcaps-prepend-cache test documents a non-desired
aspect of the current cache implementation: If the cache selects a DSO
that does not exist on disk, _dl_map_object falls back to open_path,
which may or may not find an alternative implementation. This is an
existing limitation that also applies to the legacy hwcaps processing
for ld.so.cache.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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prev parent reply other threads:[~2020-12-04 8:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-07 10:24 [Bug dynamic-link/25938] New: " fw at deneb dot enyo.de
2020-12-04 8:52 ` fweimer at redhat dot com [this message]
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