diff options
Diffstat (limited to 'newlib/libc/sys/linux/dl/do-lookup.h')
| -rw-r--r-- | newlib/libc/sys/linux/dl/do-lookup.h | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/newlib/libc/sys/linux/dl/do-lookup.h b/newlib/libc/sys/linux/dl/do-lookup.h deleted file mode 100644 index b9364b95d..000000000 --- a/newlib/libc/sys/linux/dl/do-lookup.h +++ /dev/null @@ -1,200 +0,0 @@ -/* Look up a symbol in the loaded objects. - Copyright (C) 1995,96,97,98,99,2000,2001 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. */ - -#if VERSIONED -# define FCT do_lookup_versioned -# define ARG const struct r_found_version *const version, -#else -# define FCT do_lookup -# define ARG -#endif - -/* Inner part of the lookup functions. We return a value > 0 if we - found the symbol, the value 0 if nothing is found and < 0 if - something bad happened. */ -static inline int -FCT (const char *undef_name, unsigned long int hash, const ElfW(Sym) *ref, - struct sym_val *result, struct r_scope_elem *scope, size_t i, ARG - struct link_map *skip, int type_class) -{ - struct link_map **list = scope->r_list; - size_t n = scope->r_nlist; - struct link_map *map; - - do - { - const ElfW(Sym) *symtab; - const char *strtab; - const ElfW(Half) *verstab; - Elf_Symndx symidx; - const ElfW(Sym) *sym; -#if ! VERSIONED - int num_versions = 0; - const ElfW(Sym) *versioned_sym = NULL; -#endif - - map = list[i]; - - /* Here come the extra test needed for `_dl_lookup_symbol_skip'. */ - if (skip != NULL && map == skip) - continue; - - /* Don't search the executable when resolving a copy reloc. */ - if ((type_class & ELF_RTYPE_CLASS_COPY) && map->l_type == lt_executable) - continue; - - /* Print some debugging info if wanted. */ - if (__builtin_expect (_dl_debug_mask & DL_DEBUG_SYMBOLS, 0)) - _dl_debug_printf ("symbol=%s; lookup in file=%s\n", undef_name, - map->l_name[0] ? map->l_name : _dl_argv[0]); - - symtab = (const void *) D_PTR (map, l_info[DT_SYMTAB]); - strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]); - verstab = map->l_versyms; - - /* Search the appropriate hash bucket in this object's symbol table - for a definition for the same symbol name. */ - for (symidx = map->l_buckets[hash % map->l_nbuckets]; - symidx != STN_UNDEF; - symidx = map->l_chain[symidx]) - { - sym = &symtab[symidx]; - - assert (ELF_RTYPE_CLASS_PLT == 1); - if (sym->st_value == 0 || /* No value. */ - /* ((type_class & ELF_RTYPE_CLASS_PLT) - && (sym->st_shndx == SHN_UNDEF)) */ - (type_class & (sym->st_shndx == SHN_UNDEF))) - continue; - - if (ELFW(ST_TYPE) (sym->st_info) > STT_FUNC) - /* Ignore all but STT_NOTYPE, STT_OBJECT and STT_FUNC entries - since these are no code/data definitions. */ - continue; - - if (sym != ref && strcmp (strtab + sym->st_name, undef_name)) - /* Not the symbol we are looking for. */ - continue; - -#if VERSIONED - if (__builtin_expect (verstab == NULL, 0)) - { - /* We need a versioned symbol but haven't found any. If - this is the object which is referenced in the verneed - entry it is a bug in the library since a symbol must - not simply disappear. - - It would also be a bug in the object since it means that - the list of required versions is incomplete and so the - tests in dl-version.c haven't found a problem.*/ - assert (version->filename == NULL - || ! _dl_name_match_p (version->filename, map)); - - /* Otherwise we accept the symbol. */ - } - else - { - /* We can match the version information or use the - default one if it is not hidden. */ - ElfW(Half) ndx = verstab[symidx] & 0x7fff; - if ((map->l_versions[ndx].hash != version->hash - || strcmp (map->l_versions[ndx].name, version->name)) - && (version->hidden || map->l_versions[ndx].hash - || (verstab[symidx] & 0x8000))) - /* It's not the version we want. */ - continue; - } -#else - /* No specific version is selected. When the object file - also does not define a version we have a match. - Otherwise we accept the default version, or in case there - is only one version defined, this one version. */ - if (verstab != NULL) - { - ElfW(Half) ndx = verstab[symidx] & 0x7fff; - if (ndx > 2) /* map->l_versions[ndx].hash != 0) */ - { - /* Don't accept hidden symbols. */ - if ((verstab[symidx] & 0x8000) == 0 && num_versions++ == 0) - /* No version so far. */ - versioned_sym = sym; - continue; - } - } -#endif - - /* There cannot be another entry for this symbol so stop here. */ - goto found_it; - } - - /* If we have seen exactly one versioned symbol while we are - looking for an unversioned symbol and the version is not the - default version we still accept this symbol since there are - no possible ambiguities. */ -#if VERSIONED - sym = NULL; -#else - sym = num_versions == 1 ? versioned_sym : NULL; -#endif - - if (sym != NULL) - { - found_it: - switch (ELFW(ST_BIND) (sym->st_info)) - { - case STB_WEAK: - /* Weak definition. Use this value if we don't find another. */ - if (__builtin_expect (_dl_dynamic_weak, 0)) - { - if (! result->s) - { - result->s = sym; - result->m = map; - } - break; - } - /* FALLTHROUGH */ - case STB_GLOBAL: - /* Global definition. Just what we need. */ - result->s = sym; - result->m = map; - return 1; - default: - /* Local symbols are ignored. */ - break; - } - } - -#if VERSIONED - /* If this current map is the one mentioned in the verneed entry - and we have not found a weak entry, it is a bug. */ - if (symidx == STN_UNDEF && version->filename != NULL - && __builtin_expect (_dl_name_match_p (version->filename, map), 0)) - return -1; -#endif - } - while (++i < n); - - /* We have not found anything until now. */ - return 0; -} - -#undef FCT -#undef ARG -#undef VERSIONED |