elf/dl-profstub.c

   1 /* Helper definitions for profiling of shared libraries.
   2    Copyright (C) 1998-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <dlfcn.h>
  21 #include <elf.h>
  22 #include <ldsodefs.h>
  23
  24 /* This is the map for the shared object we profile.  It is defined here
  25    only because we test for this value being NULL or not.  */
  26
  27
  28 void
  29 _dl_mcount_wrapper (void *selfpc)
  30 {
  31   GLRO(dl_mcount) ((ElfW(Addr)) RETURN_ADDRESS (0), (ElfW(Addr)) selfpc);
  32 }
  33
  34
  35 void
  36 _dl_mcount_wrapper_check (void *selfpc)
  37 {
  38   if (GL(dl_profile_map) != NULL)
  39     GLRO(dl_mcount) ((ElfW(Addr)) RETURN_ADDRESS (0), (ElfW(Addr)) selfpc);
  40 }
  41 libc_hidden_def (_dl_mcount_wrapper_check)