1  /* Support for reading /etc/ld.so.cache files written by Linux ldconfig.
       2     Copyright (C) 2022-2023 Free Software Foundation, Inc.
       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
       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.
       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
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library.  If not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <ldconfig.h>
      20  #include <assert.h>
      21  
      22  #if defined __loongarch_double_float
      23  # define _DL_CACHE_DEFAULT_ID    (FLAG_LARCH_FLOAT_ABI_DOUBLE | FLAG_ELF_LIBC6)
      24  #else
      25  # define _DL_CACHE_DEFAULT_ID    (FLAG_LARCH_FLOAT_ABI_SOFT | FLAG_ELF_LIBC6)
      26  #endif
      27  
      28  #define _dl_cache_check_flags(flags)                    \
      29    ((flags) == _DL_CACHE_DEFAULT_ID)
      30  
      31  /* If given a path to one of our library directories, adds every library
      32     directory via add_dir (), otherwise just adds the giver directory.  On
      33     LoongArch, libraries can be found in paths ending in:
      34       - /lib64
      35       - /lib64/sf
      36     so this will add all of those paths.  */
      37  
      38  #define add_system_dir(dir) 						\
      39    do							    		\
      40      {									\
      41        static const char* lib_dirs[] = {					\
      42  	"/lib64",							\
      43  	"/lib64/sf",							\
      44  	NULL,								\
      45        };								\
      46        const size_t lib_len = sizeof ("/lib") - 1;			\
      47        size_t len = strlen (dir);					\
      48        char path[len + 6];						\
      49        const char **ptr;							\
      50  									\
      51        memcpy (path, dir, len + 1);					\
      52  									\
      53        for (ptr = lib_dirs; *ptr != NULL; ptr++)				\
      54  	{								\
      55  	  const char *lib_dir = *ptr;					\
      56  	  size_t dir_len = strlen (lib_dir);				\
      57  									\
      58  	  if (len >= dir_len						\
      59  	      && !memcmp (path + len - dir_len, lib_dir, dir_len))	\
      60  	    {								\
      61  	      len -= dir_len - lib_len;					\
      62  	      path[len] = '\0';						\
      63  	      break;							\
      64  	    }								\
      65  	}								\
      66        add_dir (path);							\
      67        if (len >= lib_len						\
      68  	  && !memcmp (path + len - lib_len, "/lib", lib_len))		\
      69  	for (ptr = lib_dirs; *ptr != NULL; ptr++)			\
      70  	  {								\
      71  	    const char *lib_dir = *ptr;					\
      72  	    size_t dir_len = strlen (lib_dir);				\
      73  									\
      74  	    assert (dir_len >= lib_len);				\
      75  	    memcpy (path + len, lib_dir + lib_len,			\
      76  		    dir_len - lib_len + 1);				\
      77  	    add_dir (path);						\
      78  	  }								\
      79      } while (0)
      80  
      81  
      82  #include_next <dl-cache.h>