elf/tst-sonamemove-link.c

   1 /* Check that a versioned symbol can move from one library to another.
   2    Copyright (C) 2019-2024 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 /* At link time, moved_function is bound to the symbol version
  20    SONAME_MOVE in tst-sonamemove-runmod1.so, using the
  21    tst-sonamemove-linkmod1.so stub object.
  22
  23    At run time, the process loads the real tst-sonamemove-runmod1.so,
  24    which depends on tst-sonamemove-runmod2.so.
  25    tst-sonamemove-runmod1.so does not define moved_function, but
  26    tst-sonamemove-runmod2.so does.
  27
  28    The net effect is that the versioned symbol
  29    moved_function@SONAME_MOVE moved from the soname
  30    tst-sonamemove-linkmod1.so at link time to the soname
  31    tst-sonamemove-linkmod2.so at run time. */
  32 void moved_function (void);
  33
  34 static int
  35 do_test (void)
  36 {
  37   moved_function ();
  38   return 0;
  39 }
  40
  41 #include <support/test-driver.c>