1  /* Function descriptors. Generic version.
       2     Copyright (C) 1995-2023 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     <https://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 */