[thirdparty/glibc.git] / sysdeps / generic / dl-cache.h

/* Support for reading /etc/ld.so.cache files written by Linux ldconfig.
   Copyright (C) 1999-2021 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
   <https://www.gnu.org/licenses/>.  */

#ifndef _DL_CACHE_H
#define _DL_CACHE_H

#include <endian.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <string.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
{
  int32_t flags;		/* This is 1 for an ELF library.  */
  uint32_t 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
{
  union
  {
    /* Fields shared with struct file_entry.  */
    struct file_entry entry;
    /* Also expose these fields directly.  */
    struct
    {
      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.	 */
};

/* This bit in the hwcap field of struct file_entry_new indicates that
   the lower 32 bits contain an index into the
   cache_extension_tag_glibc_hwcaps section.  Older glibc versions do
   not know about this HWCAP bit, so they will ignore these
   entries.  */
#define DL_CACHE_HWCAP_EXTENSION (1ULL << 62)

/* Return true if the ENTRY->hwcap value indicates that
   DL_CACHE_HWCAP_EXTENSION is used.  */
static inline bool
dl_cache_hwcap_extension (struct file_entry_new *entry)
{
  /* If DL_CACHE_HWCAP_EXTENSION is set, but other bits as well, this
     is a different kind of extension.  */
  return (entry->hwcap >> 32) == (DL_CACHE_HWCAP_EXTENSION >> 32);
}

/* See flags member of struct cache_file_new below.  */
enum
  {
    /* No endianness information available.  An old ldconfig version
       without endianness support wrote the file.  */
    cache_file_new_flags_endian_unset = 0,

    /* Cache is invalid and should be ignored.  */
    cache_file_new_flags_endian_invalid = 1,

    /* Cache format is little endian.  */
    cache_file_new_flags_endian_little = 2,

    /* Cache format is big endian.  */
    cache_file_new_flags_endian_big = 3,

    /* Bit mask to extract the cache_file_new_flags_endian_*
       values.  */
    cache_file_new_flags_endian_mask = 3,

    /* Expected value of the endian bits in the flags member for the
       current architecture.  */
    cache_file_new_flags_endian_current
      = (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
	 ? cache_file_new_flags_endian_little
	 : cache_file_new_flags_endian_big),
  };

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. */

  /* flags & cache_file_new_flags_endian_mask is one of the values
     cache_file_new_flags_endian_unset, cache_file_new_flags_endian_invalid,
     cache_file_new_flags_endian_little, cache_file_new_flags_endian_big.

     The remaining bits are unused and should be generated as zero and
     ignored by readers.  */
  uint8_t flags;

  uint8_t padding_unsed[3];	/* Not used, for future extensions.  */

  /* File offset of the extension directory.  See struct
     cache_extension below.  Must be a multiple of four.  */
  uint32_t extension_offset;

  uint32_t unused[3];		/* 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.	*/
};
_Static_assert (sizeof (struct cache_file_new) == 48,
		"size of struct cache_file_new");

/* Returns false if *CACHE has the wrong endianness for this
   architecture, and true if the endianness matches (or is
   unknown).  */
static inline bool
cache_file_new_matches_endian (const struct cache_file_new *cache)
{
  /* A zero value for cache->flags means that no endianness
     information is available.  */
  return cache->flags == 0
    || ((cache->flags & cache_file_new_flags_endian_big)
	== cache_file_new_flags_endian_current);
}


/* Randomly chosen magic value, which allows for additional
   consistency verification.  */
enum { cache_extension_magic = (uint32_t) -358342284 };

/* Tag values for different kinds of extension sections.  Similar to
   SHT_* constants.  */
enum cache_extension_tag
  {
   /* Array of bytes containing the glibc version that generated this
      cache file.  */
   cache_extension_tag_generator,

   /* glibc-hwcaps subdirectory information.  An array of uint32_t
      values, which are indices into the string table.  The strings
      are sorted lexicographically (according to strcmp).  The extra
      level of indirection (instead of using string table indices
      directly) allows the dynamic loader to compute the preference
      order of the hwcaps names more efficiently.

      For this section, 4-byte alignment is required, and the section
      size must be a multiple of 4.  */
   cache_extension_tag_glibc_hwcaps,

   /* Total number of known cache extension tags.  */
   cache_extension_count
  };

/* Element in the array following struct cache_extension.  Similar to
   an ELF section header.  */
struct cache_extension_section
{
  /* Type of the extension section.  A enum cache_extension_tag value.  */
  uint32_t tag;

  /* Extension-specific flags.  Currently generated as zero.  */
  uint32_t flags;

  /* Offset from the start of the file for the data in this extension
     section.  Specific extensions can have alignment constraints.  */
  uint32_t offset;

  /* Length in bytes of the extension data.  Specific extensions may
     have size requirements.  */
  uint32_t size;
};

/* The extension directory in the cache.  An array of struct
   cache_extension_section entries.  */
struct cache_extension
{
  uint32_t magic;		/* Always cache_extension_magic.  */
  uint32_t count;		/* Number of following entries.  */

  /* count section descriptors of type struct cache_extension_section
     follow.  */
  struct cache_extension_section sections[];
};

/* A relocated version of struct cache_extension_section.  */
struct cache_extension_loaded
{
  /* Address and size of this extension section.  base is NULL if the
     section is missing from the file.  */
  const void *base;
  size_t size;

  /* Flags from struct cache_extension_section.  */
  uint32_t flags;
};

/* All supported extension sections, relocated.  Filled in by
   cache_extension_load below.  */
struct cache_extension_all_loaded
{
  struct cache_extension_loaded sections[cache_extension_count];
};

/* Performs basic data validation based on section tag, and removes
   the sections which are invalid.  */
static void
cache_extension_verify (struct cache_extension_all_loaded *loaded)
{
  {
    /* Section must not be empty, it must be aligned at 4 bytes, and
       the size must be a multiple of 4.  */
    struct cache_extension_loaded *hwcaps
      = &loaded->sections[cache_extension_tag_glibc_hwcaps];
    if (hwcaps->size == 0
	|| ((uintptr_t) hwcaps->base % 4) != 0
	|| (hwcaps->size % 4) != 0)
      {
	hwcaps->base = NULL;
	hwcaps->size = 0;
	hwcaps->flags = 0;
      }
  }
}

static bool __attribute__ ((unused))
cache_extension_load (const struct cache_file_new *cache,
		      const void *file_base, size_t file_size,
		      struct cache_extension_all_loaded *loaded)
{
  memset (loaded, 0, sizeof (*loaded));
  if (cache->extension_offset == 0)
    /* No extensions present.  This is not a format error.  */
    return true;
  if ((cache->extension_offset % 4) != 0)
    /* Extension offset is misaligned.  */
    return false;
  size_t size_tmp;
  if (__builtin_add_overflow (cache->extension_offset,
			      sizeof (struct cache_extension), &size_tmp)
      || size_tmp > file_size)
    /* Extension extends beyond the end of the file.  */
    return false;
  const struct cache_extension *ext = file_base + cache->extension_offset;
  if (ext->magic != cache_extension_magic)
    return false;
  if (__builtin_mul_overflow (ext->count,
			      sizeof (struct cache_extension_section),
			      &size_tmp)
      || __builtin_add_overflow (cache->extension_offset
				 + sizeof (struct cache_extension), size_tmp,
				 &size_tmp)
      || size_tmp > file_size)
    /* Extension array extends beyond the end of the file.  */
    return false;
  for (uint32_t i = 0; i < ext->count; ++i)
    {
      if (__builtin_add_overflow (ext->sections[i].offset,
				  ext->sections[i].size, &size_tmp)
	  || size_tmp > file_size)
	/* Extension data extends beyond the end of the file.  */
	return false;

      uint32_t tag = ext->sections[i].tag;
      if (tag >= cache_extension_count)
	/* Tag is out of range and unrecognized.  */
	continue;
      loaded->sections[tag].base = file_base + ext->sections[i].offset;
      loaded->sections[tag].size = ext->sections[i].size;
      loaded->sections[tag].flags = ext->sections[i].flags;
    }
  cache_extension_verify (loaded);
  return true;
}

/* 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;

#endif /* _DL_CACHE_H */
Commit	Line	Data
c41baa79	1	/* Support for reading /etc/ld.so.cache files written by Linux ldconfig.
2b778ceb	2	Copyright (C) 1999-2021 Free Software Foundation, Inc.
c41baa79 UD	3	This file is part of the GNU C Library.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
c41baa79 UD	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	13	Lesser General Public License for more details.
c41baa79	14
41bdb6e2	15	You should have received a copy of the GNU Lesser General Public
59ba27a6	16	License along with the GNU C Library; if not, see
5a82c748	17	<https://www.gnu.org/licenses/>. */
c41baa79	18
84ba719b FW	19	#ifndef _DL_CACHE_H
	20	#define _DL_CACHE_H
	21
	22	#include <endian.h>
	23	#include <stdbool.h>
dfb3f101	24	#include <stddef.h>
a8fd59b0	25	#include <stdint.h>
dfb3f101	26	#include <string.h>
a8fd59b0	27
e25054c4 AJ	28	#ifndef _DL_CACHE_DEFAULT_ID
	29	# define _DL_CACHE_DEFAULT_ID 3
	30	#endif
c41baa79	31
e25054c4 AJ	32	#ifndef _dl_cache_check_flags
e25054c4 AJ	33	# define _dl_cache_check_flags(flags) \
c41baa79	34	((flags) == 1 \|\| (flags) == _DL_CACHE_DEFAULT_ID)
e25054c4	35	#endif
45eca4d1 UD	36
45eca4d1 UD	37	#ifndef LD_SO_CACHE
8ca91b36	38	# define LD_SO_CACHE SYSCONFDIR "/ld.so.cache"
45eca4d1 UD	39	#endif
45eca4d1 UD	40
bd89c0b5 UD	41	#ifndef add_system_dir
	42	# define add_system_dir(dir) add_dir (dir)
	43	#endif
	44
45eca4d1 UD	45	#define CACHEMAGIC "ld.so-1.7.0"
	46
	47	/* libc5 and glibc 2.0/2.1 use the same format. For glibc 2.2 another
	48	format has been added in a compatible way:
	49	The beginning of the string table is used for the new table:
e25054c4	50	old_magic
45eca4d1 UD	51	nlibs
	52	libs[0]
	53	...
	54	libs[nlibs-1]
e25054c4 AJ	55	pad, new magic needs to be aligned
	56	- this is string[0] for the old format
	57	new magic - this is string[0] for the new format
45eca4d1 UD	58	newnlibs
	59	...
	60	newlibs[0]
	61	...
	62	newlibs[newnlibs-1]
	63	string 1
	64	string 2
	65	...
	66	*/
	67	struct file_entry
	68	{
de1a9197 FW	69	int32_t flags; /* This is 1 for an ELF library. */
de1a9197 FW	70	uint32_t key, value; /* String table indices. */
45eca4d1 UD	71	};
	72
	73	struct cache_file
	74	{
	75	char magic[sizeof CACHEMAGIC - 1];
	76	unsigned int nlibs;
	77	struct file_entry libs[0];
	78	};
	79
	80	#define CACHEMAGIC_NEW "glibc-ld.so.cache"
a8fd59b0	81	#define CACHE_VERSION "1.1"
ea029468	82	#define CACHEMAGIC_VERSION_NEW CACHEMAGIC_NEW CACHE_VERSION
45eca4d1 UD	83
	84
	85	struct file_entry_new
	86	{
de1a9197 FW	87	union
	88	{
	89	/* Fields shared with struct file_entry. */
	90	struct file_entry entry;
	91	/* Also expose these fields directly. */
	92	struct
	93	{
	94	int32_t flags; /* This is 1 for an ELF library. */
	95	uint32_t key, value; /* String table indices. */
	96	};
	97	};
a986484f	98	uint32_t osversion; /* Required OS version. */
a8fd59b0	99	uint64_t hwcap; /* Hwcap entry. */
45eca4d1 UD	100	};
45eca4d1 UD	101
b44ac4f4 FW	102	/* This bit in the hwcap field of struct file_entry_new indicates that
	103	the lower 32 bits contain an index into the
	104	cache_extension_tag_glibc_hwcaps section. Older glibc versions do
	105	not know about this HWCAP bit, so they will ignore these
	106	entries. */
	107	#define DL_CACHE_HWCAP_EXTENSION (1ULL << 62)
	108
	109	/* Return true if the ENTRY->hwcap value indicates that
	110	DL_CACHE_HWCAP_EXTENSION is used. */
	111	static inline bool
	112	dl_cache_hwcap_extension (struct file_entry_new *entry)
	113	{
	114	/* If DL_CACHE_HWCAP_EXTENSION is set, but other bits as well, this
	115	is a different kind of extension. */
	116	return (entry->hwcap >> 32) == (DL_CACHE_HWCAP_EXTENSION >> 32);
	117	}
	118
84ba719b FW	119	/* See flags member of struct cache_file_new below. */
	120	enum
	121	{
	122	/* No endianness information available. An old ldconfig version
	123	without endianness support wrote the file. */
	124	cache_file_new_flags_endian_unset = 0,
	125
	126	/* Cache is invalid and should be ignored. */
	127	cache_file_new_flags_endian_invalid = 1,
	128
	129	/* Cache format is little endian. */
	130	cache_file_new_flags_endian_little = 2,
	131
	132	/* Cache format is big endian. */
	133	cache_file_new_flags_endian_big = 3,
	134
	135	/* Bit mask to extract the cache_file_new_flags_endian_*
	136	values. */
	137	cache_file_new_flags_endian_mask = 3,
	138
	139	/* Expected value of the endian bits in the flags member for the
	140	current architecture. */
	141	cache_file_new_flags_endian_current
	142	= (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
	143	? cache_file_new_flags_endian_little
	144	: cache_file_new_flags_endian_big),
	145	};
	146
45eca4d1 UD	147	struct cache_file_new
	148	{
	149	char magic[sizeof CACHEMAGIC_NEW - 1];
	150	char version[sizeof CACHE_VERSION - 1];
a8fd59b0 AJ	151	uint32_t nlibs; /* Number of entries. */
a8fd59b0 AJ	152	uint32_t len_strings; /* Size of string table. */
84ba719b FW	153
	154	/* flags & cache_file_new_flags_endian_mask is one of the values
	155	cache_file_new_flags_endian_unset, cache_file_new_flags_endian_invalid,
	156	cache_file_new_flags_endian_little, cache_file_new_flags_endian_big.
	157
	158	The remaining bits are unused and should be generated as zero and
	159	ignored by readers. */
	160	uint8_t flags;
	161
	162	uint8_t padding_unsed[3]; /* Not used, for future extensions. */
	163
dfb3f101 FW	164	/* File offset of the extension directory. See struct
	165	cache_extension below. Must be a multiple of four. */
	166	uint32_t extension_offset;
	167
	168	uint32_t unused[3]; /* Leave space for future extensions
a8fd59b0	169	and align to 8 byte boundary. */
45eca4d1	170	struct file_entry_new libs[0]; /* Entries describing libraries. */
a8fd59b0	171	/* After this the string table of size len_strings is found. */
45eca4d1	172	};
84ba719b FW	173	_Static_assert (sizeof (struct cache_file_new) == 48,
	174	"size of struct cache_file_new");
	175
	176	/* Returns false if *CACHE has the wrong endianness for this
	177	architecture, and true if the endianness matches (or is
	178	unknown). */
	179	static inline bool
	180	cache_file_new_matches_endian (const struct cache_file_new *cache)
	181	{
	182	/* A zero value for cache->flags means that no endianness
	183	information is available. */
	184	return cache->flags == 0
	185	\|\| ((cache->flags & cache_file_new_flags_endian_big)
	186	== cache_file_new_flags_endian_current);
	187	}
	188
45eca4d1	189
dfb3f101 FW	190	/* Randomly chosen magic value, which allows for additional
	191	consistency verification. */
	192	enum { cache_extension_magic = (uint32_t) -358342284 };
	193
	194	/* Tag values for different kinds of extension sections. Similar to
	195	SHT_* constants. */
	196	enum cache_extension_tag
	197	{
	198	/* Array of bytes containing the glibc version that generated this
	199	cache file. */
	200	cache_extension_tag_generator,
	201
b44ac4f4 FW	202	/* glibc-hwcaps subdirectory information. An array of uint32_t
	203	values, which are indices into the string table. The strings
	204	are sorted lexicographically (according to strcmp). The extra
	205	level of indirection (instead of using string table indices
	206	directly) allows the dynamic loader to compute the preference
	207	order of the hwcaps names more efficiently.
	208
	209	For this section, 4-byte alignment is required, and the section
	210	size must be a multiple of 4. */
	211	cache_extension_tag_glibc_hwcaps,
	212
dfb3f101 FW	213	/* Total number of known cache extension tags. */
	214	cache_extension_count
	215	};
	216
	217	/* Element in the array following struct cache_extension. Similar to
	218	an ELF section header. */
	219	struct cache_extension_section
	220	{
	221	/* Type of the extension section. A enum cache_extension_tag value. */
	222	uint32_t tag;
	223
	224	/* Extension-specific flags. Currently generated as zero. */
	225	uint32_t flags;
	226
	227	/* Offset from the start of the file for the data in this extension
	228	section. Specific extensions can have alignment constraints. */
	229	uint32_t offset;
	230
	231	/* Length in bytes of the extension data. Specific extensions may
	232	have size requirements. */
	233	uint32_t size;
	234	};
	235
	236	/* The extension directory in the cache. An array of struct
	237	cache_extension_section entries. */
	238	struct cache_extension
	239	{
	240	uint32_t magic; /* Always cache_extension_magic. */
	241	uint32_t count; /* Number of following entries. */
	242
	243	/* count section descriptors of type struct cache_extension_section
	244	follow. */
	245	struct cache_extension_section sections[];
	246	};
	247
	248	/* A relocated version of struct cache_extension_section. */
	249	struct cache_extension_loaded
	250	{
	251	/* Address and size of this extension section. base is NULL if the
	252	section is missing from the file. */
	253	const void *base;
	254	size_t size;
	255
	256	/* Flags from struct cache_extension_section. */
	257	uint32_t flags;
	258	};
	259
	260	/* All supported extension sections, relocated. Filled in by
	261	cache_extension_load below. */
	262	struct cache_extension_all_loaded
	263	{
	264	struct cache_extension_loaded sections[cache_extension_count];
	265	};
	266
b44ac4f4 FW	267	/* Performs basic data validation based on section tag, and removes
	268	the sections which are invalid. */
	269	static void
	270	cache_extension_verify (struct cache_extension_all_loaded *loaded)
	271	{
	272	{
	273	/* Section must not be empty, it must be aligned at 4 bytes, and
	274	the size must be a multiple of 4. */
	275	struct cache_extension_loaded *hwcaps
	276	= &loaded->sections[cache_extension_tag_glibc_hwcaps];
	277	if (hwcaps->size == 0
	278	\|\| ((uintptr_t) hwcaps->base % 4) != 0
	279	\|\| (hwcaps->size % 4) != 0)
	280	{
	281	hwcaps->base = NULL;
	282	hwcaps->size = 0;
	283	hwcaps->flags = 0;
	284	}
	285	}
	286	}
	287
dfb3f101 FW	288	static bool __attribute__ ((unused))
	289	cache_extension_load (const struct cache_file_new *cache,
	290	const void *file_base, size_t file_size,
	291	struct cache_extension_all_loaded *loaded)
	292	{
	293	memset (loaded, 0, sizeof (*loaded));
	294	if (cache->extension_offset == 0)
	295	/* No extensions present. This is not a format error. */
	296	return true;
	297	if ((cache->extension_offset % 4) != 0)
	298	/* Extension offset is misaligned. */
	299	return false;
	300	size_t size_tmp;
	301	if (__builtin_add_overflow (cache->extension_offset,
	302	sizeof (struct cache_extension), &size_tmp)
	303	\|\| size_tmp > file_size)
	304	/* Extension extends beyond the end of the file. */
	305	return false;
	306	const struct cache_extension *ext = file_base + cache->extension_offset;
	307	if (ext->magic != cache_extension_magic)
	308	return false;
	309	if (__builtin_mul_overflow (ext->count,
	310	sizeof (struct cache_extension_section),
	311	&size_tmp)
	312	\|\| __builtin_add_overflow (cache->extension_offset
	313	+ sizeof (struct cache_extension), size_tmp,
	314	&size_tmp)
	315	\|\| size_tmp > file_size)
	316	/* Extension array extends beyond the end of the file. */
	317	return false;
	318	for (uint32_t i = 0; i < ext->count; ++i)
	319	{
	320	if (__builtin_add_overflow (ext->sections[i].offset,
	321	ext->sections[i].size, &size_tmp)
	322	\|\| size_tmp > file_size)
	323	/* Extension data extends beyond the end of the file. */
	324	return false;
	325
	326	uint32_t tag = ext->sections[i].tag;
	327	if (tag >= cache_extension_count)
	328	/* Tag is out of range and unrecognized. */
	329	continue;
	330	loaded->sections[tag].base = file_base + ext->sections[i].offset;
	331	loaded->sections[tag].size = ext->sections[i].size;
	332	loaded->sections[tag].flags = ext->sections[i].flags;
	333	}
b44ac4f4	334	cache_extension_verify (loaded);
dfb3f101 FW	335	return true;
	336	}
	337
e25054c4 AJ	338	/* Used to align cache_file_new. */
	339	#define ALIGN_CACHE(addr) \
	340	(((addr) + __alignof__ (struct cache_file_new) -1) \
	341	& (~(__alignof__ (struct cache_file_new) - 1)))
	342
17e00cc6	343	extern int _dl_cache_libcmp (const char p1, const char p2) attribute_hidden;
84ba719b FW	344
84ba719b FW	345	#endif /* _DL_CACHE_H */