| /* Variable initialization. AArch64 version. |
| Copyright (C) 2001-2014 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 <ldsodefs.h> |
| |
| #ifdef SHARED |
| |
| void |
| _dl_var_init (void *array[]) |
| { |
| /* It has to match "variables" below. */ |
| enum |
| { |
| DL_PAGESIZE = 0 |
| }; |
| |
| GLRO(dl_pagesize) = *((size_t *) array[DL_PAGESIZE]); |
| } |
| |
| #else |
| |
| static void *variables[] = |
| { |
| &GLRO(dl_pagesize) |
| }; |
| |
| static void |
| _dl_unprotect_relro (struct link_map *l) |
| { |
| ElfW(Addr) start = ((l->l_addr + l->l_relro_addr) |
| & ~(GLRO(dl_pagesize) - 1)); |
| ElfW(Addr) end = ((l->l_addr + l->l_relro_addr + l->l_relro_size) |
| & ~(GLRO(dl_pagesize) - 1)); |
| |
| if (start != end) |
| __mprotect ((void *) start, end - start, PROT_READ | PROT_WRITE); |
| } |
| |
| void |
| _dl_static_init (struct link_map *l) |
| { |
| struct link_map *rtld_map = l; |
| struct r_scope_elem **scope; |
| const ElfW(Sym) *ref = NULL; |
| lookup_t loadbase; |
| void (*f) (void *[]); |
| size_t i; |
| |
| loadbase = _dl_lookup_symbol_x ("_dl_var_init", l, &ref, l->l_local_scope, |
| NULL, 0, 1, NULL); |
| |
| for (scope = l->l_local_scope; *scope != NULL; scope++) |
| for (i = 0; i < (*scope)->r_nlist; i++) |
| if ((*scope)->r_list[i] == loadbase) |
| { |
| rtld_map = (*scope)->r_list[i]; |
| break; |
| } |
| |
| if (ref != NULL) |
| { |
| f = (void (*) (void *[])) DL_SYMBOL_ADDRESS (loadbase, ref); |
| _dl_unprotect_relro (rtld_map); |
| f (variables); |
| _dl_protect_relro (rtld_map); |
| } |
| } |
| |
| #endif |