elf/libc-dl-profstub.c

   1 /* Helper definitions for profiling of shared libraries.
   2    Copyright (C) 1998-2024 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 #include <dlfcn.h>
  20 #include <elf.h>
  21 #include <ldsodefs.h>
  22
  23 /* This is the map for the shared object we profile.  It is defined here
  24    only because we test for this value being NULL or not.  */
  25
  26
  27 void
  28 _dl_mcount_wrapper (void *selfpc)
  29 {
  30   GLRO(dl_mcount) ((ElfW(Addr)) RETURN_ADDRESS (0), (ElfW(Addr)) selfpc);
  31 }
  32
  33
  34 void
  35 _dl_mcount_wrapper_check (void *selfpc)
  36 {
  37   if (GL(dl_profile_map) != NULL)
  38     GLRO(dl_mcount) ((ElfW(Addr)) RETURN_ADDRESS (0), (ElfW(Addr)) selfpc);
  39 }
  40 libc_hidden_def (_dl_mcount_wrapper_check)