diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/riscv/dl-cache.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/riscv/dl-cache.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/riscv/dl-cache.h b/sysdeps/unix/sysv/linux/riscv/dl-cache.h new file mode 100644 index 0000000000..cbd6ef5e09 --- /dev/null +++ b/sysdeps/unix/sysv/linux/riscv/dl-cache.h @@ -0,0 +1,75 @@ +/* Support for reading /etc/ld.so.cache files written by Linux ldconfig. + Copyright (C) 2003-2018 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> |