ldso/ldso/dl-array.c

   1 /*
   2  * This file contains the helper routines to run init and fini functions.
   3  *
   4  * Copyright (C) 2000-2006 by Erik Andersen <andersen@codepoet.org>
   5  * Copyright (c) 1994-2000 Eric Youngdale, Peter MacDonald,
   6  *                              David Engel, Hongjiu Lu and Mitch D'Souza
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. The name of the above contributors may not be
  14  *    used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30
  31 #include "ldso.h"
  32
  33 static void _dl_run_array_forward(unsigned long array, unsigned long size,
  34                                   DL_LOADADDR_TYPE loadaddr)
  35 {
  36         if (array != 0) {
  37                 unsigned int j;
  38                 unsigned int jm;
  39                 ElfW(Addr) *addrs;
  40                 jm = size / sizeof (ElfW(Addr));
  41                 addrs = (ElfW(Addr) *) DL_RELOC_ADDR(loadaddr, array);
  42                 for (j = 0; j < jm; ++j) {
  43                         void (*dl_elf_func) (void);
  44                         dl_elf_func = (void (*)(void)) (intptr_t) addrs[j];
  45                         DL_CALL_FUNC_AT_ADDR (dl_elf_func, loadaddr, (void (*)(void)));
  46                 }
  47         }
  48 }
  49
  50 void _dl_run_init_array(struct elf_resolve *tpnt);
  51 void _dl_run_init_array(struct elf_resolve *tpnt)
  52 {
  53         _dl_run_array_forward(tpnt->dynamic_info[DT_INIT_ARRAY],
  54                               tpnt->dynamic_info[DT_INIT_ARRAYSZ],
  55                               tpnt->loadaddr);
  56 }
  57
  58 void _dl_app_init_array(void);
  59 void _dl_app_init_array(void)
  60 {
  61         _dl_run_init_array(_dl_loaded_modules);
  62 }
  63
  64 void _dl_run_fini_array(struct elf_resolve *tpnt);
  65 void _dl_run_fini_array(struct elf_resolve *tpnt)
  66 {
  67         if (tpnt->dynamic_info[DT_FINI_ARRAY]) {
  68                 ElfW(Addr) *array = (ElfW(Addr) *) DL_RELOC_ADDR(tpnt->loadaddr, tpnt->dynamic_info[DT_FINI_ARRAY]);
  69                 unsigned int i = (tpnt->dynamic_info[DT_FINI_ARRAYSZ] / sizeof(ElfW(Addr)));
  70                 while (i-- > 0) {
  71                         void (*dl_elf_func) (void);
  72                         dl_elf_func = (void (*)(void)) (intptr_t) array[i];
  73                         DL_CALL_FUNC_AT_ADDR (dl_elf_func, tpnt->loadaddr, (void (*)(void)));
  74                 }
  75         }
  76 }
  77
  78 void _dl_app_fini_array(void);
  79 void _dl_app_fini_array(void)
  80 {
  81         _dl_run_fini_array(_dl_loaded_modules);
  82 }
  83