diff options
Diffstat (limited to 'elf/dlsym.c')
-rw-r--r-- | elf/dlsym.c | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/elf/dlsym.c b/elf/dlsym.c deleted file mode 100644 index 6627ffc..0000000 --- a/elf/dlsym.c +++ /dev/null @@ -1,100 +0,0 @@ -/* Look up a symbol in a shared object loaded by `dlopen'. - Copyright (C) 1995, 1996, 1997, 1998, 1999 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 Library General Public License as - published by the Free Software Foundation; either version 2 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <dlfcn.h> -#include <setjmp.h> -#include <stddef.h> -#include <libintl.h> -#include <elf/ldsodefs.h> - -struct dlsym_args -{ - /* The arguments to dlsym_doit. */ - void *handle; - const char *name; - struct r_found_version version; - ElfW(Addr) caller; - /* The return values of dlsym_doit. */ - ElfW(Addr) loadbase; - const ElfW(Sym) *ref; -}; - - -static void -dlsym_doit (void *a) -{ - struct dlsym_args *args = (struct dlsym_args *) a; - args->ref = NULL; - - if (args->handle == RTLD_DEFAULT) - /* Search the global scope. */ - args->loadbase = _dl_lookup_symbol (args->name, &args->ref, - _dl_global_scope, NULL, 0); - else if (args->handle == RTLD_NEXT) - { - struct link_map *l, *match; - - /* Find the highest-addressed object that CALLER is not below. */ - match = NULL; - for (l = _dl_loaded; l; l = l->l_next) - if (args->caller >= l->l_addr && (!match || match->l_addr < l->l_addr)) - match = l; - - if (! match) - _dl_signal_error (0, NULL, _("\ -RTLD_NEXT used in code not dynamically loaded")); - - l = match; - while (l->l_loader) - l = l->l_loader; - - args->loadbase = _dl_lookup_symbol_skip (args->name, &args->ref, - l->l_local_scope, NULL, match); - - if (args->loadbase == 0) - { - /* This means that no such symbol is defined. In this case we - have to provide a phony Elfxx_Sym entry since the value is - referenced in `dlsym'. */ - static const ElfW(Sym) null_result; - - args->ref = &null_result; - } - } - else - { - /* Search the scope of the given object. */ - struct link_map *map = args->handle; - args->loadbase = _dl_lookup_symbol (args->name, &args->ref, - map->l_local_scope, map->l_name, 0); - } -} - - -void * -dlsym (void *handle, const char *name) -{ - struct dlsym_args args; - args.caller = (ElfW(Addr)) __builtin_return_address (0); - args.handle = handle; - args.name = name; - - return (_dlerror_run (dlsym_doit, &args) - ? NULL : (void *) (args.loadbase + args.ref->st_value)); -} |