From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
To: libc-alpha@sourceware.org
Subject: Re: [PATCH 14/28] elf: Enhance ld.so --help to print HWCAP subdirectories
Date: Thu, 8 Oct 2020 13:27:24 -0300 [thread overview]
Message-ID: <0df1f307-c122-7ba2-9c3c-14bec8d506c4@linaro.org> (raw)
In-Reply-To: <b124245ba3070588a8b0d88b915ff9456b27a2d4.1601569371.git.fweimer@redhat.com>
LGTM, thanks.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
On 01/10/2020 13:33, Florian Weimer via Libc-alpha wrote:
> ---
> elf/dl-usage.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 62 insertions(+)
>
> diff --git a/elf/dl-usage.c b/elf/dl-usage.c
> index 20aa715cb1..9765d1b5c1 100644
> --- a/elf/dl-usage.c
> +++ b/elf/dl-usage.c
> @@ -22,6 +22,8 @@
> #include <unistd.h>
> #include "version.h"
>
> +#include <dl-hwcaps.h>
> +
> void
> _dl_usage (const char *argv0, const char *wrong_option)
> {
> @@ -101,6 +103,65 @@ print_search_path_for_help (struct dl_main_state *state)
> print_search_path_for_help_1 (__rtld_search_dirs.dirs);
> }
>
> +/* Helper function for printing flags associated with a HWCAP name. */
> +static void
> +print_hwcap_1 (bool *first, bool active, const char *label)
> +{
> + if (active)
> + {
> + if (*first)
> + {
> + _dl_printf (" (");
> + *first = false;
> + }
> + else
> + _dl_printf (", ");
> + _dl_printf ("%s", label);
> + }
> +}
> +
> +/* Called after a series of print_hwcap_1 calls to emit the line
> + terminator. */
> +static void
> +print_hwcap_1_finish (bool *first)
> +{
> + if (*first)
> + _dl_printf ("\n");
> + else
> + _dl_printf (")\n");
> +}
> +
> +/* Write a list of hwcap subdirectories to standard output. See
> + _dl_important_hwcaps in dl-hwcaps.c. */
> +static void
> +print_legacy_hwcap_directories (void)
> +{
> + _dl_printf ("\n\
> +Legacy HWCAP subdirectories under library search path directories:\n");
> +
> + const char *platform = GLRO (dl_platform);
> + if (platform != NULL)
> + _dl_printf (" %s (AT_PLATFORM)\n", platform);
> +
> + _dl_printf (" tls (supported, searched)\n");
> +
> + uint64_t hwcap_mask = GET_HWCAP_MASK();
> + uint64_t searched = GLRO (dl_hwcap) & hwcap_mask;
> + for (int n = 63; n >= 0; --n)
> + {
> + uint64_t bit = 1ULL << n;
UINT64_C(1) maybe?
> + if (HWCAP_IMPORTANT & bit)
> + {
> + _dl_printf (" %s", _dl_hwcap_string (n));
> + bool first = true;
> + print_hwcap_1 (&first, GLRO (dl_hwcap) & bit, "supported");
> + print_hwcap_1 (&first, !(hwcap_mask & bit), "masked");
> + print_hwcap_1 (&first, searched & bit, "searched");
> + print_hwcap_1_finish (&first);
> + }
> + }
> +}
> +
Ok.
> void
> _dl_help (const char *argv0, struct dl_main_state *state)
> {
> @@ -136,5 +197,6 @@ This program interpreter self-identifies as: " RTLD "\n\
> ",
> argv0);
> print_search_path_for_help (state);
> + print_legacy_hwcap_directories ();
> _exit (0);
> }
>
Ok.
next prev parent reply other threads:[~2020-10-08 16:27 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
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 [this message]
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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