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elf: Remove legacy hwcaps support from ldconfig
Remove support for the legacy hwcaps subdirectories from ldconfig. Signed-off-by: Javier Pello <devel@otheo.eu> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
Javier Pello
Adhemerval Zanella
parent
6099908fb8
commit
b78ff5a25d
151
elf/ldconfig.c
151
elf/ldconfig.c
@ -46,16 +46,6 @@
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#include <dl-procinfo.h>
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/* This subpath in search path entries is always supported and
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included in the cache for backwards compatibility. */
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#define TLS_SUBPATH "tls"
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/* The MSB of the hwcap field is set for objects in TLS_SUBPATH
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directories. There is always TLS support in glibc, so the dynamic
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loader does not check the bit directly. But more hwcap bits make a
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an object more preferred, so the bit still has meaning. */
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#define TLS_HWCAP_BIT 63
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#ifndef LD_SO_CONF
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# define LD_SO_CONF SYSCONFDIR "/ld.so.conf"
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#endif
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@ -120,9 +110,6 @@ static char *cache_file;
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/* Configuration file. */
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static const char *config_file;
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/* Mask to use for important hardware capabilities. */
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static unsigned long int hwcap_mask = HWCAP_IMPORTANT;
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/* Name and version of program. */
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static void print_version (FILE *stream, struct argp_state *state);
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void (*argp_program_version_hook) (FILE *, struct argp_state *)
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@ -163,75 +150,6 @@ static struct argp argp =
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options, parse_opt, NULL, doc, NULL, more_help, NULL
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};
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/* Check if string corresponds to an important hardware capability or
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a platform. */
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static int
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is_hwcap_platform (const char *name)
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{
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int hwcap_idx = _dl_string_hwcap (name);
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/* Is this a normal hwcap for the machine like "fpu?" */
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if (hwcap_idx != -1 && ((1 << hwcap_idx) & hwcap_mask))
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return 1;
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/* Is this a platform pseudo-hwcap like "i686?" */
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hwcap_idx = _dl_string_platform (name);
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if (hwcap_idx != -1)
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return 1;
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/* Backwards-compatibility for the "tls" subdirectory. */
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if (strcmp (name, TLS_SUBPATH) == 0)
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return 1;
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return 0;
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}
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/* Get hwcap (including platform) encoding of path. */
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static uint64_t
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path_hwcap (const char *path)
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{
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char *str = xstrdup (path);
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char *ptr;
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uint64_t hwcap = 0;
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uint64_t h;
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size_t len;
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len = strlen (str);
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if (str[len] == '/')
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str[len] = '\0';
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/* Search pathname from the end and check for hwcap strings. */
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for (;;)
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{
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ptr = strrchr (str, '/');
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if (ptr == NULL)
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break;
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h = _dl_string_hwcap (ptr + 1);
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if (h == (uint64_t) -1)
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{
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h = _dl_string_platform (ptr + 1);
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if (h == (uint64_t) -1)
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{
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if (strcmp (ptr + 1, TLS_SUBPATH) == 0)
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h = TLS_HWCAP_BIT;
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else
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break;
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}
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}
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hwcap += 1ULL << h;
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/* Search the next part of the path. */
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*ptr = '\0';
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}
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free (str);
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return hwcap;
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}
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/* Handle program arguments. */
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static error_t
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parse_opt (int key, char *arg, struct argp_state *state)
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@ -747,27 +665,15 @@ struct dlib_entry
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static void
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search_dir (const struct dir_entry *entry)
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{
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uint64_t hwcap;
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if (opt_verbose)
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{
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if (entry->hwcaps == NULL)
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{
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hwcap = path_hwcap (entry->path);
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if (opt_verbose)
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{
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if (hwcap != 0)
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printf ("%s: (hwcap: %#.16" PRIx64 ")", entry->path, hwcap);
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else
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printf ("%s:", entry->path);
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}
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}
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else
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{
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hwcap = 0;
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if (opt_verbose)
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printf ("%s: (hwcap: \"%s\")", entry->path,
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glibc_hwcaps_subdirectory_name (entry->hwcaps));
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}
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if (opt_verbose)
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printf (_(" (from %s:%d)\n"), entry->from_file, entry->from_line);
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}
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char *dir_name;
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char *real_file_name;
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@ -808,14 +714,10 @@ search_dir (const struct dir_entry *entry)
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&& direntry->d_type != DT_REG
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&& direntry->d_type != DT_DIR)
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continue;
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/* Does this file look like a shared library or is it a hwcap
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subdirectory (if not already processing a glibc-hwcaps
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subdirectory)? The dynamic linker is also considered as
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shared library. */
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/* Does this file look like a shared library? The dynamic linker
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is also considered as shared library. */
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if (!_dl_is_dso (direntry->d_name)
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&& (direntry->d_type == DT_REG
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|| (entry->hwcaps == NULL
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&& !is_hwcap_platform (direntry->d_name))))
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&& (direntry->d_type == DT_REG || entry->hwcaps == NULL))
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continue;
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size_t len = strlen (direntry->d_name);
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@ -863,7 +765,6 @@ search_dir (const struct dir_entry *entry)
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}
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struct stat stat_buf;
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bool is_dir;
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int is_link = S_ISLNK (lstat_buf.st_mode);
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if (is_link)
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{
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@ -898,37 +799,13 @@ search_dir (const struct dir_entry *entry)
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if (opt_chroot != NULL)
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free (target_name);
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is_dir = S_ISDIR (stat_buf.st_mode);
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/* lstat_buf is later stored, update contents. */
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lstat_buf.st_dev = stat_buf.st_dev;
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lstat_buf.st_ino = stat_buf.st_ino;
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lstat_buf.st_size = stat_buf.st_size;
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lstat_buf.st_ctime = stat_buf.st_ctime;
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}
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else
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is_dir = S_ISDIR (lstat_buf.st_mode);
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/* No descending into subdirectories if this directory is a
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glibc-hwcaps subdirectory (which are not recursive). */
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if (entry->hwcaps == NULL
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&& is_dir && is_hwcap_platform (direntry->d_name))
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{
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if (!is_link
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&& direntry->d_type != DT_UNKNOWN
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&& __builtin_expect (lstat (real_file_name, &lstat_buf), 0))
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{
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error (0, errno, _("Cannot lstat %s"), file_name);
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continue;
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}
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/* Handle subdirectory later. */
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struct dir_entry *new_entry = new_sub_entry (entry, file_name,
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&lstat_buf);
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add_single_dir (new_entry, 0);
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continue;
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}
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else if (!S_ISREG (lstat_buf.st_mode) && !is_link)
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else if (!S_ISREG (lstat_buf.st_mode))
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continue;
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char *real_name;
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@ -1103,7 +980,7 @@ search_dir (const struct dir_entry *entry)
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}
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if (opt_build_cache)
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add_to_cache (entry->path, filename, dlib_ptr->soname,
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dlib_ptr->flag, dlib_ptr->isa_level, hwcap,
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dlib_ptr->flag, dlib_ptr->isa_level, 0,
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entry->hwcaps);
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}
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@ -1290,16 +1167,6 @@ parse_conf_include (const char *config_file, unsigned int lineno,
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free (copy);
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}
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/* Honour LD_HWCAP_MASK. */
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static void
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set_hwcap (void)
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{
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char *mask = getenv ("LD_HWCAP_MASK");
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if (mask)
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hwcap_mask = strtoul (mask, NULL, 0);
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}
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int
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main (int argc, char **argv)
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@ -1332,8 +1199,6 @@ main (int argc, char **argv)
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add_dir_1 (argv[i], "<cmdline>", 0);
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}
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set_hwcap ();
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if (opt_chroot != NULL)
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{
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/* Normalize the path a bit, we might need it for printing later. */
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