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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [dl/] [dl-cache.h] - Blame information for rev 207

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Line No. Rev Author Line
1 207 jeremybenn
/* Support for reading /etc/ld.so.cache files written by Linux ldconfig.
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   Copyright (C) 1999, 2000 Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
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   The GNU C Library is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, write to the Free
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   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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   02111-1307 USA.  */
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#include <stdint.h>
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#ifndef _DL_CACHE_DEFAULT_ID
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# define _DL_CACHE_DEFAULT_ID   3
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#endif
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#ifndef _dl_cache_check_flags
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# define _dl_cache_check_flags(flags)                   \
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  ((flags) == 1 || (flags) == _DL_CACHE_DEFAULT_ID)
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#endif
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#ifndef SYSCONFDIR
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# define SYSCONFDIR "/etc"
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#endif
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#ifndef LD_SO_CACHE
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# define LD_SO_CACHE SYSCONFDIR "/ld.so.cache"
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#endif
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#define CACHEMAGIC "ld.so-1.7.0"
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/* libc5 and glibc 2.0/2.1 use the same format.  For glibc 2.2 another
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   format has been added in a compatible way:
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   The beginning of the string table is used for the new table:
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        old_magic
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        nlibs
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        libs[0]
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        ...
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        libs[nlibs-1]
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        pad, new magic needs to be aligned
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             - this is string[0] for the old format
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        new magic - this is string[0] for the new format
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        newnlibs
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        ...
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        newlibs[0]
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        ...
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        newlibs[newnlibs-1]
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        string 1
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        string 2
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        ...
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*/
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struct file_entry
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{
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  int flags;            /* This is 1 for an ELF library.  */
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  unsigned int key, value; /* String table indices.  */
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};
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struct cache_file
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{
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  char magic[sizeof CACHEMAGIC - 1];
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  unsigned int nlibs;
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  struct file_entry libs[0];
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};
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#define CACHEMAGIC_NEW "glibc-ld.so.cache"
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#define CACHE_VERSION "1.1"
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#define CACHEMAGIC_VERSION_NEW CACHEMAGIC_NEW CACHE_VERSION
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struct file_entry_new
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{
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  int32_t flags;                /* This is 1 for an ELF library.  */
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  uint32_t key, value;          /* String table indices.  */
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  uint32_t osversion;           /* Required OS version.  */
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  uint64_t hwcap;               /* Hwcap entry.  */
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};
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struct cache_file_new
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{
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  char magic[sizeof CACHEMAGIC_NEW - 1];
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  char version[sizeof CACHE_VERSION - 1];
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  uint32_t nlibs;               /* Number of entries.  */
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  uint32_t len_strings;         /* Size of string table. */
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  uint32_t unused[5];           /* Leave space for future extensions
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                                   and align to 8 byte boundary.  */
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  struct file_entry_new libs[0]; /* Entries describing libraries.  */
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  /* After this the string table of size len_strings is found.  */
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};
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/* Used to align cache_file_new.  */
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#define ALIGN_CACHE(addr)                               \
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(((addr) + __alignof__ (struct cache_file_new) -1)      \
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 & (~(__alignof__ (struct cache_file_new) - 1)))
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static int
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_dl_cache_libcmp (const char *p1, const char *p2)
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{
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  while (*p1 != '\0')
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    {
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      if (*p1 >= '0' && *p1 <= '9')
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        {
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          if (*p2 >= '0' && *p2 <= '9')
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            {
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              /* Must compare this numerically.  */
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              int val1;
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              int val2;
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              val1 = *p1++ - '0';
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              val2 = *p2++ - '0';
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              while (*p1 >= '0' && *p1 <= '9')
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                val1 = val1 * 10 + *p1++ - '0';
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              while (*p2 >= '0' && *p2 <= '9')
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                val2 = val2 * 10 + *p2++ - '0';
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              if (val1 != val2)
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                return val1 - val2;
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            }
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          else
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            return 1;
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        }
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      else if (*p2 >= '0' && *p2 <= '9')
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        return -1;
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      else if (*p1 != *p2)
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        return *p1 - *p2;
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      else
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        {
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          ++p1;
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          ++p2;
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        }
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    }
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  return *p1 - *p2;
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}

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