From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
To: Carlos O'Donell <carlos@redhat.com>, libc-alpha@sourceware.org
Subject: Re: [PATCH 01/28] elf: Do not search HWCAP subdirectories in statically linked binaries
Date: Thu, 1 Oct 2020 15:29:02 -0300 [thread overview]
Message-ID: <1818e0ce-25da-a7a0-aaca-475b15874e8c@linaro.org> (raw)
In-Reply-To: <f7d645f2-dfaf-796e-b807-78d821917bf2@redhat.com>
On 01/10/2020 15:24, Carlos O'Donell wrote:
> On 10/1/20 2:22 PM, Adhemerval Zanella via Libc-alpha wrote:
>>
>>
>> On 01/10/2020 13:31, Florian Weimer via Libc-alpha wrote:
>>> This functionality does not seem to be useful since static dlopen
>>> is mostly used for iconv/character set conversion and NSS support.
>>> gconv modules are loaded with full paths anyway, so that the
>>> HWCAP subdirectory logic does not apply.
>>
>> This change looks reasonable, although it makes the semantic of
>> statically linked programs slight different than dynamic one regarding
>> dlopen.
>
> I think this is OK.
>
> dlopen from statically linked programs is deprecated, the only uses
> should be internal to glibc in NSS And iconv.
>
> We really really want:
>
> * Just a statically linked program that has no external deps.
>
> * Just a dynamically linked program can support dlopen.
>
> This half-way inbetween support we have has serious consequences,
> and is the reason I supported us deprecating dlopen from static
> binaries. Users should not be allowed to shoot themselves in
> the foot.
>
> $0.02.
>
I agree, usually on discussion about static linking with glibc users
get perplexed why shared libraries are being loaded under the hood
and usually this is a deal breaker on most usercases (another one
is the minimum kernel requirement).
next prev parent reply other threads:[~2020-10-01 18:29 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-01 16:31 [PATCH 00/28] glibc-hwcaps support Florian Weimer
2020-10-01 16:31 ` [PATCH 01/28] elf: Do not search HWCAP subdirectories in statically linked binaries Florian Weimer
2020-10-01 18:22 ` Adhemerval Zanella
2020-10-01 18:24 ` Carlos O'Donell
2020-10-01 18:29 ` Adhemerval Zanella [this message]
2020-10-01 20:24 ` Carlos O'Donell
2020-10-01 16:31 ` [PATCH 02/28] elf: Implement __rtld_malloc_is_full Florian Weimer
2020-10-01 18:23 ` Adhemerval Zanella
2020-10-08 9:44 ` Florian Weimer
2020-10-01 16:31 ` [PATCH 03/28] elf: Implement _dl_write Florian Weimer
2020-10-05 19:46 ` Adhemerval Zanella
2020-10-01 16:31 ` [PATCH 04/28] elf: Extract command-line/environment variables state from rtld.c Florian Weimer
2020-10-06 20:45 ` Adhemerval Zanella
2020-10-08 11:32 ` Florian Weimer
2020-10-01 16:32 ` [PATCH 05/28] elf: Move ld.so error/help output to _dl_usage Florian Weimer
2020-10-06 21:06 ` Adhemerval Zanella
2020-10-08 12:19 ` Florian Weimer
2020-10-01 16:32 ` [PATCH 06/28] elf: Record whether paths come from LD_LIBRARY_PATH or --library-path Florian Weimer
2020-10-07 16:39 ` Adhemerval Zanella
2020-10-07 16:49 ` Florian Weimer
2020-10-01 16:32 ` [PATCH 07/28] elf: Implement ld.so --help Florian Weimer
2020-10-07 17:16 ` Adhemerval Zanella
2020-10-08 13:13 ` Florian Weimer
2020-10-01 16:32 ` [PATCH 08/28] elf: Implement ld.so --version Florian Weimer
2020-10-07 18:36 ` Adhemerval Zanella
2020-10-07 18:38 ` Adhemerval Zanella
2020-10-08 13:37 ` Florian Weimer
2020-10-01 16:32 ` [PATCH 09/28] scripts/update-copyrights: Update csu/version.c, elf/dl-usage.c Florian Weimer
2020-10-07 18:41 ` Adhemerval Zanella
2020-10-01 16:32 ` [PATCH 10/28] elf: Use the term "program interpreter" in the ld.so help message Florian Weimer
2020-10-07 21:08 ` Adhemerval Zanella
2020-10-08 14:08 ` Florian Weimer
2020-10-01 16:32 ` [PATCH 11/28] elf: Print the full name of the dynamic loader " Florian Weimer
2020-10-08 12:38 ` Adhemerval Zanella
2020-10-01 16:32 ` [PATCH 12/28] elf: Make __rtld_env_path_list and __rtld_search_dirs global variables Florian Weimer
2020-10-08 13:27 ` Adhemerval Zanella
2020-10-01 16:32 ` [PATCH 13/28] elf: Add library search path information to ld.so --help Florian Weimer
2020-10-08 16:22 ` Adhemerval Zanella
2020-10-01 16:33 ` [PATCH 14/28] elf: Enhance ld.so --help to print HWCAP subdirectories Florian Weimer
2020-10-08 16:27 ` Adhemerval Zanella
2020-10-09 8:18 ` Florian Weimer
2020-10-09 13:49 ` Matheus Castanho
2020-10-09 17:08 ` Florian Weimer
2020-10-09 17:12 ` Florian Weimer
2020-10-09 18:54 ` Matheus Castanho
2020-10-12 9:47 ` Florian Weimer
2020-10-01 16:33 ` [PATCH 15/28] elf: Do not pass GLRO(dl_platform), GLRO(dl_platformlen) to _dl_important_hwcaps Florian Weimer
2020-10-08 18:04 ` Adhemerval Zanella
2020-10-01 16:33 ` [PATCH 16/28] elf: Add glibc-hwcaps support for LD_LIBRARY_PATH Florian Weimer
2020-10-08 10:13 ` Szabolcs Nagy
2020-10-09 9:08 ` Florian Weimer
2020-10-09 10:50 ` Szabolcs Nagy
2020-10-09 10:55 ` Florian Weimer
2020-10-09 11:03 ` Szabolcs Nagy
2020-10-08 23:16 ` Paul A. Clarke
2020-10-09 8:56 ` Florian Weimer
2020-10-09 13:19 ` Adhemerval Zanella
2020-10-12 11:54 ` Florian Weimer
2020-10-01 16:33 ` [PATCH 17/28] x86_64: Add glibc-hwcaps support Florian Weimer
2020-10-01 16:33 ` [PATCH 18/28] powerpc64le: " Florian Weimer
2020-10-01 18:56 ` Paul A. Clarke
2020-10-05 9:47 ` Florian Weimer
2020-10-05 19:15 ` Paul A. Clarke
2020-10-06 12:20 ` Florian Weimer
2020-10-06 17:45 ` Paul A. Clarke
2020-10-09 9:06 ` Florian Weimer
2020-10-01 16:33 ` [PATCH 19/28] s390x: Add " Florian Weimer
2020-10-01 16:33 ` [PATCH 20/28] aarch64: " Florian Weimer
2020-10-14 13:46 ` Adhemerval Zanella
2020-10-14 14:08 ` Florian Weimer
2020-10-14 14:15 ` Adhemerval Zanella
2020-10-14 14:37 ` Szabolcs Nagy
2020-10-14 14:43 ` Adhemerval Zanella
2020-10-14 15:13 ` Florian Weimer
2020-10-14 14:44 ` Florian Weimer
2020-10-14 15:09 ` Szabolcs Nagy
2020-10-01 16:33 ` [PATCH 21/28] elf: Add endianness markup to ld.so.cache Florian Weimer
2020-10-14 14:07 ` Adhemerval Zanella
2020-10-01 16:33 ` [PATCH 22/28] elf: Add extension mechanism " Florian Weimer
2020-10-15 17:52 ` Adhemerval Zanella
2020-10-30 12:22 ` Florian Weimer
2020-11-03 12:45 ` Adhemerval Zanella
2020-11-03 15:30 ` Florian Weimer
2020-10-01 16:34 ` [PATCH 23/28] elf: Unify old and new format cache handling code in ld.so Florian Weimer
2020-10-16 14:37 ` Adhemerval Zanella
2020-10-30 13:22 ` Florian Weimer
2020-11-03 13:02 ` Adhemerval Zanella
2020-10-01 16:34 ` [PATCH 24/28] elf: Implement a string table for ldconfig, with tail merging Florian Weimer
2020-10-20 14:25 ` Adhemerval Zanella
2020-10-30 17:08 ` Florian Weimer
2020-11-03 13:05 ` Adhemerval Zanella
2020-11-03 15:29 ` Florian Weimer
2020-10-01 16:34 ` [PATCH 25/28] elf: Implement tail merging of strings in ldconfig Florian Weimer
2020-10-22 21:08 ` Adhemerval Zanella
2020-10-30 17:36 ` Florian Weimer
2020-10-01 16:34 ` [PATCH 26/28] elf: In ldconfig, extract the new_sub_entry function from search_dir Florian Weimer
2020-10-27 13:15 ` Adhemerval Zanella
2020-10-01 16:34 ` [PATCH 27/28] elf: Process glibc-hwcaps subdirectories in ldconfig Florian Weimer
2020-10-27 17:28 ` Adhemerval Zanella
2020-11-04 11:57 ` Florian Weimer
2020-10-01 16:34 ` [PATCH 28/28] elf: Add glibc-hwcaps subdirectory support to ld.so cache processing Florian Weimer
2020-10-01 16:50 ` [PATCH 00/28] glibc-hwcaps support H.J. Lu
2020-10-01 16:54 ` Florian Weimer
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