diff options
Diffstat (limited to 'newlib/libc/sys/linux/dl/dl-cache.h')
| -rw-r--r-- | newlib/libc/sys/linux/dl/dl-cache.h | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/newlib/libc/sys/linux/dl/dl-cache.h b/newlib/libc/sys/linux/dl/dl-cache.h new file mode 100644 index 000000000..0699853e7 --- /dev/null +++ b/newlib/libc/sys/linux/dl/dl-cache.h @@ -0,0 +1,140 @@ +/* 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; +} |