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- /* Support for reading /etc/ld.so.cache files written by Linux ldconfig.
- Copyright (C) 2003-2019 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
- <http://www.gnu.org/licenses/>. */
- #include <ldconfig.h>
- /* For now we only support the natural XLEN ABI length on all targets, so the
- only bits that need to go into ld.so.cache are the FLEG ABI length. */
- #if defined __riscv_float_abi_double
- # define _DL_CACHE_DEFAULT_ID (FLAG_RISCV_FLOAT_ABI_DOUBLE | FLAG_ELF_LIBC6)
- #else
- # define _DL_CACHE_DEFAULT_ID (FLAG_RISCV_FLOAT_ABI_SOFT | FLAG_ELF_LIBC6)
- #endif
- #define _dl_cache_check_flags(flags) \
- ((flags) == _DL_CACHE_DEFAULT_ID)
- /* If given a path to one of our library directories, adds every library
- directory via add_dir (), otherwise just adds the giver directory. On
- RISC-V, libraries can be found in paths ending in:
- - /lib64/lp64d
- - /lib64/lp64
- - /lib (only ld.so)
- so this will add all of those paths.
- According to Joseph Myers:
- My reasoning for that would be: generic autoconf-configured (etc.)
- software may only know about using the lib directory, so you want the
- lib directory to be searched regardless of the ABI - but it's also
- useful to be able to e.g. list /usr/local/lib in /etc/ld.so.conf for all
- architectures and have that automatically imply /usr/local/lib64/lp64d
- etc. so that libraries can be found that come from software that does
- use the ABI-specific directories. */
- #define add_system_dir(dir) \
- do \
- { \
- size_t len = strlen (dir); \
- char path[len + 9]; \
- memcpy (path, dir, len + 1); \
- if (len >= 12 && ! memcmp(path + len - 12, "/lib64/lp64d", 12)) \
- { \
- len -= 8; \
- path[len] = '\0'; \
- } \
- if (len >= 11 && ! memcmp(path + len - 11, "/lib64/lp64", 11)) \
- { \
- len -= 7; \
- path[len] = '\0'; \
- } \
- add_dir (path); \
- if (len >= 4 && ! memcmp(path + len - 4, "/lib", 4)) \
- { \
- memcpy (path + len, "64/lp64d", 9); \
- add_dir (path); \
- memcpy (path + len, "64/lp64", 8); \
- add_dir (path); \
- } \
- } while (0)
- #include_next <dl-cache.h>
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