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/* Communicate dynamic linker state to the debugger at runtime.
   Copyright (C) 1996, 1998, 2000, 2002, 2004 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <ldsodefs.h>

/* This structure communicates dl state to the debugger.  The debugger
   normally finds it via the DT_DEBUG entry in the dynamic section, but in
   a statically-linked program there is no dynamic section for the debugger
   to examine and it looks for this particular symbol name.  */
struct r_debug _r_debug;

/* Initialize _r_debug if it has not already been done.  The argument is
   the run-time load address of the dynamic linker, to be put in
   _r_debug.r_ldbase.  Returns the address of _r_debug.  */

struct r_debug *
_dl_debug_initialize (ElfW(Addr) ldbase)
  if (_r_debug.r_brk == 0)
      /* Tell the debugger where to find the map of loaded objects.  */
      _r_debug.r_version = 1  /* R_DEBUG_VERSION XXX */;
      _r_debug.r_ldbase = ldbase;
      // XXX This is problematic.  It means we cannot tell the debugger
      // XXX about namespaces other than the main one.
      _r_debug.r_map = GL(dl_ns)[LM_ID_BASE]._ns_loaded;
      _r_debug.r_brk = (ElfW(Addr)) &_dl_debug_state;

  return &_r_debug;

/* This function exists solely to have a breakpoint set on it by the
   debugger.  The debugger is supposed to find this function's address by
   examining the r_brk member of struct r_debug, but GDB 4.15 in fact looks
   for this particular symbol name in the PT_INTERP file.  */
_dl_debug_state (void)
rtld_hidden_def (_dl_debug_state)

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