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-rw-r--r--sysdeps/generic/dl-cache.c311
1 files changed, 0 insertions, 311 deletions
diff --git a/sysdeps/generic/dl-cache.c b/sysdeps/generic/dl-cache.c
deleted file mode 100644
index 29886e194a..0000000000
--- a/sysdeps/generic/dl-cache.c
+++ /dev/null
@@ -1,311 +0,0 @@
-/* Support for reading /etc/ld.so.cache files written by Linux ldconfig.
- Copyright (C) 1996-2002, 2003, 2004 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#include <assert.h>
-#include <unistd.h>
-#include <ldsodefs.h>
-#include <sys/mman.h>
-#include <dl-cache.h>
-#include <dl-procinfo.h>
-
-#include <stdio-common/_itoa.h>
-
-#ifndef _DL_PLATFORMS_COUNT
-# define _DL_PLATFORMS_COUNT 0
-#endif
-
-/* This is the starting address and the size of the mmap()ed file. */
-static struct cache_file *cache;
-static struct cache_file_new *cache_new;
-static size_t cachesize;
-
-/* 1 if cache_data + PTR points into the cache. */
-#define _dl_cache_verify_ptr(ptr) (ptr < cache_data_size)
-
-#define SEARCH_CACHE(cache) \
-/* We use binary search since the table is sorted in the cache file. \
- The first matching entry in the table is returned. \
- It is important to use the same algorithm as used while generating \
- the cache file. */ \
-do \
- { \
- left = 0; \
- right = cache->nlibs - 1; \
- \
- while (left <= right) \
- { \
- __typeof__ (cache->libs[0].key) key; \
- \
- middle = (left + right) / 2; \
- \
- key = cache->libs[middle].key; \
- \
- /* Make sure string table indices are not bogus before using \
- them. */ \
- if (! _dl_cache_verify_ptr (key)) \
- { \
- cmpres = 1; \
- break; \
- } \
- \
- /* Actually compare the entry with the key. */ \
- cmpres = _dl_cache_libcmp (name, cache_data + key); \
- if (__builtin_expect (cmpres == 0, 0)) \
- { \
- /* Found it. LEFT now marks the last entry for which we \
- know the name is correct. */ \
- left = middle; \
- \
- /* There might be entries with this name before the one we \
- found. So we have to find the beginning. */ \
- while (middle > 0) \
- { \
- __typeof__ (cache->libs[0].key) key; \
- \
- key = cache->libs[middle - 1].key; \
- /* Make sure string table indices are not bogus before \
- using them. */ \
- if (! _dl_cache_verify_ptr (key) \
- /* Actually compare the entry. */ \
- || _dl_cache_libcmp (name, cache_data + key) != 0) \
- break; \
- --middle; \
- } \
- \
- do \
- { \
- int flags; \
- __typeof__ (cache->libs[0]) *lib = &cache->libs[middle]; \
- \
- /* Only perform the name test if necessary. */ \
- if (middle > left \
- /* We haven't seen this string so far. Test whether the \
- index is ok and whether the name matches. Otherwise \
- we are done. */ \
- && (! _dl_cache_verify_ptr (lib->key) \
- || (_dl_cache_libcmp (name, cache_data + lib->key) \
- != 0))) \
- break; \
- \
- flags = lib->flags; \
- if (_dl_cache_check_flags (flags) \
- && _dl_cache_verify_ptr (lib->value)) \
- { \
- if (best == NULL || flags == GLRO(dl_correct_cache_id)) \
- { \
- HWCAP_CHECK; \
- best = cache_data + lib->value; \
- \
- if (flags == GLRO(dl_correct_cache_id)) \
- /* We've found an exact match for the shared \
- object and no general `ELF' release. Stop \
- searching. */ \
- break; \
- } \
- } \
- } \
- while (++middle <= right); \
- break; \
- } \
- \
- if (cmpres < 0) \
- left = middle + 1; \
- else \
- right = middle - 1; \
- } \
- } \
-while (0)
-
-
-int
-internal_function
-_dl_cache_libcmp (const char *p1, const char *p2)
-{
- while (*p1 != '\0')
- {
- if (*p1 >= '0' && *p1 <= '9')
- {
- if (*p2 >= '0' && *p2 <= '9')
- {
- /* Must compare this numerically. */
- int val1;
- int val2;
-
- val1 = *p1++ - '0';
- val2 = *p2++ - '0';
- while (*p1 >= '0' && *p1 <= '9')
- val1 = val1 * 10 + *p1++ - '0';
- while (*p2 >= '0' && *p2 <= '9')
- val2 = val2 * 10 + *p2++ - '0';
- if (val1 != val2)
- return val1 - val2;
- }
- else
- return 1;
- }
- else if (*p2 >= '0' && *p2 <= '9')
- return -1;
- else if (*p1 != *p2)
- return *p1 - *p2;
- else
- {
- ++p1;
- ++p2;
- }
- }
- return *p1 - *p2;
-}
-
-
-/* Look up NAME in ld.so.cache and return the file name stored there,
- or null if none is found. */
-
-const char *
-internal_function
-_dl_load_cache_lookup (const char *name)
-{
- int left, right, middle;
- int cmpres;
- const char *cache_data;
- uint32_t cache_data_size;
- const char *best;
-
- /* Print a message if the loading of libs is traced. */
- if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_LIBS, 0))
- _dl_debug_printf (" search cache=%s\n", LD_SO_CACHE);
-
- if (cache == NULL)
- {
- /* Read the contents of the file. */
- void *file = _dl_sysdep_read_whole_file (LD_SO_CACHE, &cachesize,
- PROT_READ);
-
- /* We can handle three different cache file formats here:
- - the old libc5/glibc2.0/2.1 format
- - the old format with the new format in it
- - only the new format
- The following checks if the cache contains any of these formats. */
- if (file != MAP_FAILED && cachesize > sizeof *cache
- && memcmp (file, CACHEMAGIC, sizeof CACHEMAGIC - 1) == 0)
- {
- size_t offset;
- /* Looks ok. */
- cache = file;
-
- /* Check for new version. */
- offset = ALIGN_CACHE (sizeof (struct cache_file)
- + cache->nlibs * sizeof (struct file_entry));
-
- cache_new = (struct cache_file_new *) ((void *) cache + offset);
- if (cachesize < (offset + sizeof (struct cache_file_new))
- || memcmp (cache_new->magic, CACHEMAGIC_VERSION_NEW,
- sizeof CACHEMAGIC_VERSION_NEW - 1) != 0)
- cache_new = (void *) -1;
- }
- else if (file != MAP_FAILED && cachesize > sizeof *cache_new
- && memcmp (file, CACHEMAGIC_VERSION_NEW,
- sizeof CACHEMAGIC_VERSION_NEW - 1) == 0)
- {
- cache_new = file;
- cache = file;
- }
- else
- {
- if (file != MAP_FAILED)
- __munmap (file, cachesize);
- cache = (void *) -1;
- }
-
- assert (cache != NULL);
- }
-
- if (cache == (void *) -1)
- /* Previously looked for the cache file and didn't find it. */
- return NULL;
-
- best = NULL;
-
- if (cache_new != (void *) -1)
- {
- uint64_t platform;
-
- /* This is where the strings start. */
- cache_data = (const char *) cache_new;
-
- /* Now we can compute how large the string table is. */
- cache_data_size = (const char *) cache + cachesize - cache_data;
-
- platform = _dl_string_platform (GLRO(dl_platform));
- if (platform != (uint64_t) -1)
- platform = 1ULL << platform;
-
- /* Only accept hwcap if it's for the right platform. */
-#ifdef USE_TLS
-# define _DL_HWCAP_TLS_MASK (1LL << 63)
-#else
-# define _DL_HWCAP_TLS_MASK 0
-#endif
-#define HWCAP_CHECK \
- if (GLRO(dl_osversion) && lib->osversion > GLRO(dl_osversion)) \
- continue; \
- if (_DL_PLATFORMS_COUNT && platform != -1 \
- && (lib->hwcap & _DL_HWCAP_PLATFORM) != 0 \
- && (lib->hwcap & _DL_HWCAP_PLATFORM) != platform) \
- continue; \
- if (lib->hwcap \
- & ~(GLRO(dl_hwcap) | _DL_HWCAP_PLATFORM | _DL_HWCAP_TLS_MASK)) \
- continue
- SEARCH_CACHE (cache_new);
- }
- else
- {
- /* This is where the strings start. */
- cache_data = (const char *) &cache->libs[cache->nlibs];
-
- /* Now we can compute how large the string table is. */
- cache_data_size = (const char *) cache + cachesize - cache_data;
-
-#undef HWCAP_CHECK
-#define HWCAP_CHECK do {} while (0)
- SEARCH_CACHE (cache);
- }
-
- /* Print our result if wanted. */
- if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_LIBS, 0)
- && best != NULL)
- _dl_debug_printf (" trying file=%s\n", best);
-
- return best;
-}
-
-#ifndef MAP_COPY
-/* If the system does not support MAP_COPY we cannot leave the file open
- all the time since this would create problems when the file is replaced.
- Therefore we provide this function to close the file and open it again
- once needed. */
-void
-_dl_unload_cache (void)
-{
- if (cache != NULL && cache != (struct cache_file *) -1)
- {
- __munmap (cache, cachesize);
- cache = NULL;
- }
-}
-#endif
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