sysdeps/unix/sysv/aix/dl-sym.c

   1 /* Copyright (C) 2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <stdarg.h>
  20 #include <stdlib.h>
  21 #include <sys/types.h>
  22 #include <errno.h>
  23 #include <dlfcn.h>
  24 #include <dlldr.h>
  25
  26 extern int _dl_numso;
  27 extern DL_SODATA *_dl_sotable;
  28
  29 void *
  30 _dl_sym (void *handle, const char *symbol, void *who)
  31 {
  32   void *rt_function;
  33
  34   if ((int) handle < 0 || (int) handle >= _dl_numso || _dl_sotable == NULL)
  35     {
  36       errno = EINVAL;
  37       return NULL;
  38     }
  39
  40   switch (_dl_sotable[(int) handle].type)
  41     {
  42     case DL_UNIX_SYSCALL:
  43       rt_function = (void *) __loadx (DL_UNIX_SYSCALL, (void *) symbol);
  44       break;
  45
  46     case DL_GETSYM:
  47       rt_function = (void *) __loadx (DL_GETSYM, (void *) symbol,
  48                                       _dl_sotable[(int) handle].index,
  49                                       _dl_sotable[(int) handle].dataorg);
  50       break;
  51
  52     default:
  53       errno = EINVAL;
  54       return NULL;
  55     }
  56
  57   return rt_function;
  58 }