sysdeps/generic/dl-fptr.h

   1 /* Function descriptors. Generic version.
   2    Copyright (C) 1995-2016 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef dl_fptr_h
  20 #define dl_fptr_h 1
  21
  22 /* An FDESC is a function descriptor.  */
  23
  24 struct fdesc
  25   {
  26     ElfW(Addr) ip;      /* code entry point */
  27     ElfW(Addr) gp;      /* global pointer */
  28   };
  29
  30 struct fdesc_table
  31   {
  32     struct fdesc_table *next;
  33     unsigned int len;                   /* # of entries in fdesc table */
  34     volatile unsigned int first_unused; /* index of first available entry */
  35     struct fdesc fdesc[0];
  36   };
  37
  38 struct link_map;
  39
  40 extern ElfW(Addr) _dl_boot_fptr_table [];
  41
  42 extern ElfW(Addr) _dl_make_fptr (struct link_map *, const ElfW(Sym) *,
  43                                  ElfW(Addr));
  44
  45 #endif /* !dl_fptr_h */