/* 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;