elf/tst-ifunc-textrel.c

   1 /* Check DT_TEXTREL/DF_TEXTREL support with ifunc.
   2    Copyright (C) 2018-2021 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 <stdint.h>
  20
  21 /* Force a text relocation in the object.  */
  22 static const uintptr_t
  23 address __attribute__((section(".text"))) = (uintptr_t) &address;
  24
  25 static uintptr_t
  26 foo_impl (void)
  27 {
  28   return address;
  29 }
  30
  31 void *
  32 __attribute__((noinline))
  33 foo (void)
  34 {
  35   return (void*) foo_impl;
  36 }
  37 __asm__ (".type foo, %gnu_indirect_function");
  38
  39 static int
  40 do_test (void)
  41 {
  42   return (uintptr_t) foo () != 0 ? 0 : 1;
  43 }
  44
  45 #include <support/test-driver.c>