libgcc/config/sol2/crtpg.c

   1 /* Register profiling startup and cleanup with Solaris CRTs.
   2    Copyright (C) 2015-2018 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 Under Section 7 of GPL version 3, you are granted additional
  17 permissions described in the GCC Runtime Library Exception, version
  18 3.1, as published by the Free Software Foundation.
  19
  20 You should have received a copy of the GNU General Public License and
  21 a copy of the GCC Runtime Library Exception along with this program;
  22 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25 #include <stdlib.h>
  26
  27 extern void monstartup (char *, char *);
  28 extern void _mcleanup (void);
  29
  30 extern char _start[], _etext[];
  31
  32 int __start_crt_compiler (int, char **);
  33
  34 /* Since Solaris 11.4, the system-provided CRTs provide a hook to invoke
  35    initialization code early during process startup.  __start_crt_compiler
  36    is documented in crt1.o(5).  We use it to perform initialization for
  37    profiling as a substitute for the earlier separate gcrt1.o.  */
  38
  39 int
  40 __start_crt_compiler (int argc __attribute__ ((unused)),
  41                       char **argv __attribute__ ((unused)))
  42 {
  43   monstartup (_start, _etext);
  44   atexit (_mcleanup);
  45   return 0;
  46 }