diff options
Diffstat (limited to 'sysdeps/unix/sysv')
| -rw-r--r-- | sysdeps/unix/sysv/linux/loongarch/dl-cache.h | 82 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/loongarch/readelflib.c | 70 |
2 files changed, 152 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/loongarch/dl-cache.h b/sysdeps/unix/sysv/linux/loongarch/dl-cache.h new file mode 100644 index 0000000000..05219c6272 --- /dev/null +++ b/sysdeps/unix/sysv/linux/loongarch/dl-cache.h @@ -0,0 +1,82 @@ +/* Support for reading /etc/ld.so.cache files written by Linux ldconfig. + Copyright (C) 2022-2023 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 + <https://www.gnu.org/licenses/>. */ + +#include <ldconfig.h> +#include <assert.h> + +#if defined __loongarch_double_float +# define _DL_CACHE_DEFAULT_ID (FLAG_LARCH_FLOAT_ABI_DOUBLE | FLAG_ELF_LIBC6) +#else +# define _DL_CACHE_DEFAULT_ID (FLAG_LARCH_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 + LoongArch, libraries can be found in paths ending in: + - /lib64 + - /lib64/sf + so this will add all of those paths. */ + +#define add_system_dir(dir) \ + do \ + { \ + static const char* lib_dirs[] = { \ + "/lib64", \ + "/lib64/sf", \ + NULL, \ + }; \ + const size_t lib_len = sizeof ("/lib") - 1; \ + size_t len = strlen (dir); \ + char path[len + 6]; \ + const char **ptr; \ + \ + memcpy (path, dir, len + 1); \ + \ + for (ptr = lib_dirs; *ptr != NULL; ptr++) \ + { \ + const char *lib_dir = *ptr; \ + size_t dir_len = strlen (lib_dir); \ + \ + if (len >= dir_len \ + && !memcmp (path + len - dir_len, lib_dir, dir_len)) \ + { \ + len -= dir_len - lib_len; \ + path[len] = '\0'; \ + break; \ + } \ + } \ + add_dir (path); \ + if (len >= lib_len \ + && !memcmp (path + len - lib_len, "/lib", lib_len)) \ + for (ptr = lib_dirs; *ptr != NULL; ptr++) \ + { \ + const char *lib_dir = *ptr; \ + size_t dir_len = strlen (lib_dir); \ + \ + assert (dir_len >= lib_len); \ + memcpy (path + len, lib_dir + lib_len, \ + dir_len - lib_len + 1); \ + add_dir (path); \ + } \ + } while (0) + + +#include_next <dl-cache.h> diff --git a/sysdeps/unix/sysv/linux/loongarch/readelflib.c b/sysdeps/unix/sysv/linux/loongarch/readelflib.c new file mode 100644 index 0000000000..bcaff86b36 --- /dev/null +++ b/sysdeps/unix/sysv/linux/loongarch/readelflib.c @@ -0,0 +1,70 @@ +/* Support for reading ELF files. + Copyright (C) 2022-2023 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 + <https://www.gnu.org/licenses/>. */ + + +int process_elf64_file (const char *file_name, const char *lib, + int *flag, unsigned int *isa_level, char **soname, + void *file_contents, size_t file_length); + +#define SUPPORTED_ELF_FLAGS \ + (EF_LARCH_ABI_DOUBLE_FLOAT | EF_LARCH_ABI_SOFT_FLOAT) + +/* Returns 0 if everything is ok, != 0 in case of error. */ +int +process_elf_file (const char *file_name, const char *lib, int *flag, + unsigned int *isa_level, char **soname, void *file_contents, + size_t file_length) +{ + ElfW(Ehdr) *elf_header = (ElfW(Ehdr) *) file_contents; + Elf64_Ehdr *elf64_header = (Elf64_Ehdr *) elf_header; + int ret; + long flags; + + /* LoongArch libraries are always libc.so.6+. */ + *flag = FLAG_ELF_LIBC6; + + ret = process_elf64_file (file_name, lib, flag, isa_level, soname, + file_contents, file_length); + flags = elf64_header->e_flags; + + /* LoongArch linkers encode the floating point ABI as part of the ELF headers. */ + switch (flags & SUPPORTED_ELF_FLAGS) + { + case EF_LARCH_ABI_SOFT_FLOAT: + *flag |= FLAG_LARCH_FLOAT_ABI_SOFT; + break; + case EF_LARCH_ABI_DOUBLE_FLOAT: + *flag |= FLAG_LARCH_FLOAT_ABI_DOUBLE; + break; + default: + return 1; + } + + /* If there are any other ELF flags set then glibc doesn't support this + library. */ + if (flags & ~SUPPORTED_ELF_FLAGS) + return 1; + + return ret; +} + +#undef __ELF_NATIVE_CLASS +#undef process_elf_file +#define process_elf_file process_elf64_file +#define __ELF_NATIVE_CLASS 64 +#include "elf/readelflib.c" |