elf/dl-error.c

   1 /* Error handling for runtime dynamic linker.
   2 Copyright (C) 1995 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 Library General Public License as
   7 published by the Free Software Foundation; either version 2 of the
   8 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 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with the GNU C Library; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  18 Cambridge, MA 02139, USA.  */
  19
  20 #include <stddef.h>
  21 #include <link.h>
  22 #include <setjmp.h>
  23
  24 static jmp_buf catch_env;
  25 static const char *signalled_errstring;
  26
  27 void
  28 _dl_signal_error (int errcode, const char *errstring)
  29 {
  30   signalled_errstring = errstring ?: "DYNAMIC LINKER BUG!!!";
  31   longjmp (catch_env, errcode ?: -1);
  32 }
  33
  34 int
  35 _dl_catch_error (const char **errstring, void (*operate) (void))
  36 {
  37   int errcode;
  38
  39   signalled_errstring = NULL;
  40   errcode = setjmp (catch_env);
  41   (*operate) ();
  42   *errstring = signalled_errstring;
  43   return *errstring ? errcode : 0;
  44 }