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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [dl/] [dl-cache.h] - Rev 262
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/* Support for reading /etc/ld.so.cache files written by Linux ldconfig. Copyright (C) 1999, 2000 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 <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 SYSCONFDIR # define SYSCONFDIR "/etc" #endif #ifndef LD_SO_CACHE # define LD_SO_CACHE SYSCONFDIR "/ld.so.cache" #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))) static int _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; }
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