| /* Support for reading /etc/ld.so.cache files written by Linux ldconfig. |
| Copyright (C) 1999-2018 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <stdint.h> |
| |
| #ifndef _DL_CACHE_DEFAULT_ID |
| # define _DL_CACHE_DEFAULT_ID 3 |
| #endif |
| |
| #ifndef _dl_cache_check_flags |
| # define _dl_cache_check_flags(flags) \ |
| ((flags) == 1 || (flags) == _DL_CACHE_DEFAULT_ID) |
| #endif |
| |
| #ifndef LD_SO_CACHE |
| # define LD_SO_CACHE SYSCONFDIR "/ld.so.cache" |
| #endif |
| |
| #ifndef add_system_dir |
| # define add_system_dir(dir) add_dir (dir) |
| #endif |
| |
| #define CACHEMAGIC "ld.so-1.7.0" |
| |
| /* libc5 and glibc 2.0/2.1 use the same format. For glibc 2.2 another |
| format has been added in a compatible way: |
| The beginning of the string table is used for the new table: |
| old_magic |
| nlibs |
| libs[0] |
| ... |
| libs[nlibs-1] |
| pad, new magic needs to be aligned |
| - this is string[0] for the old format |
| new magic - this is string[0] for the new format |
| newnlibs |
| ... |
| newlibs[0] |
| ... |
| newlibs[newnlibs-1] |
| string 1 |
| string 2 |
| ... |
| */ |
| struct file_entry |
| { |
| int flags; /* This is 1 for an ELF library. */ |
| unsigned int key, value; /* String table indices. */ |
| }; |
| |
| struct cache_file |
| { |
| char magic[sizeof CACHEMAGIC - 1]; |
| unsigned int nlibs; |
| struct file_entry libs[0]; |
| }; |
| |
| #define CACHEMAGIC_NEW "glibc-ld.so.cache" |
| #define CACHE_VERSION "1.1" |
| #define CACHEMAGIC_VERSION_NEW CACHEMAGIC_NEW CACHE_VERSION |
| |
| |
| struct file_entry_new |
| { |
| int32_t flags; /* This is 1 for an ELF library. */ |
| uint32_t key, value; /* String table indices. */ |
| uint32_t osversion; /* Required OS version. */ |
| uint64_t hwcap; /* Hwcap entry. */ |
| }; |
| |
| struct cache_file_new |
| { |
| char magic[sizeof CACHEMAGIC_NEW - 1]; |
| char version[sizeof CACHE_VERSION - 1]; |
| uint32_t nlibs; /* Number of entries. */ |
| uint32_t len_strings; /* Size of string table. */ |
| uint32_t unused[5]; /* Leave space for future extensions |
| and align to 8 byte boundary. */ |
| struct file_entry_new libs[0]; /* Entries describing libraries. */ |
| /* After this the string table of size len_strings is found. */ |
| }; |
| |
| /* Used to align cache_file_new. */ |
| #define ALIGN_CACHE(addr) \ |
| (((addr) + __alignof__ (struct cache_file_new) -1) \ |
| & (~(__alignof__ (struct cache_file_new) - 1))) |
| |
| extern int _dl_cache_libcmp (const char *p1, const char *p2) attribute_hidden; |