text: /* Handle shared libraries for GDB, the GNU Debugger.
  
     Copyright (C) 2000-2013 Free Software Foundation, Inc.
  
     This file is part of GDB.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program 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 General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #ifndef SOLIB_SVR4_H
  #define SOLIB_SVR4_H
  
  struct objfile;
  struct target_so_ops;
  
  extern struct target_so_ops svr4_so_ops;
  
  /* Critical offsets and sizes which describe struct r_debug and
     struct link_map on SVR4-like targets.  All offsets and sizes are
     in bytes unless otherwise specified.  */
  
  struct link_map_offsets
    {
      /* Offset and size of r_debug.r_version.  */
      int r_version_offset, r_version_size;
  
      /* Offset of r_debug.r_map.  */
      int r_map_offset;
  
      /* Offset of r_debug.r_brk.  */
      int r_brk_offset;
  
      /* Offset of r_debug.r_ldsomap.  */
      int r_ldsomap_offset;
  
      /* Size of struct link_map (or equivalent), or at least enough of it
         to be able to obtain the fields below.  */
      int link_map_size;
  
      /* Offset to l_addr field in struct link_map.  */
      int l_addr_offset;
  
      /* Offset to l_ld field in struct link_map.  */
      int l_ld_offset;
  
      /* Offset to l_next field in struct link_map.  */
      int l_next_offset;
  
      /* Offset to l_prev field in struct link_map.  */
      int l_prev_offset;
  
      /* Offset to l_name field in struct link_map.  */
      int l_name_offset;
    };
  
  /* set_solib_svr4_fetch_link_map_offsets() is intended to be called by
     a <arch>_gdbarch_init() function.  It is used to establish an
     architecture specific link_map_offsets fetcher for the architecture
     being defined.  */
  
  extern void set_solib_svr4_fetch_link_map_offsets
    (struct gdbarch *gdbarch, struct link_map_offsets *(*func) (void));
  
  /* This function is called by thread_db.c.  Return the address of the
     link map for the given objfile.  */
  extern CORE_ADDR svr4_fetch_objfile_link_map (struct objfile *objfile);
  
  /* Fetch (and possibly build) an appropriate `struct link_map_offsets'
     for ILP32 and LP64 SVR4 systems.  */
  extern struct link_map_offsets *svr4_ilp32_fetch_link_map_offsets (void);
  extern struct link_map_offsets *svr4_lp64_fetch_link_map_offsets (void);
  
  /* Return 1 if PC lies in the dynamic symbol resolution code of the
     SVR4 run time loader.  */
  int svr4_in_dynsym_resolve_code (CORE_ADDR pc);
  
  #endif /* solib-svr4.h */
  