sysdeps/aarch64/tst-ifunc-arg-1.c

   1 /* Test STT_GNU_IFUNC resolver with second argument.
   2    Copyright (C) 2019-2023 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 #include <sys/auxv.h>
  21 #include <sys/ifunc.h>
  22 #include <support/check.h>
  23
  24 static int
  25 one (void)
  26 {
  27   return 1;
  28 }
  29
  30 static uint64_t saved_arg1;
  31 static __ifunc_arg_t saved_arg2;
  32
  33 /* extern visible ifunc symbol.  */
  34 int
  35 foo (void);
  36
  37 void *
  38 foo_ifunc (uint64_t, const __ifunc_arg_t *) __asm__ ("foo");
  39 __asm__(".type foo, %gnu_indirect_function");
  40
  41 void *
  42 inhibit_stack_protector
  43 foo_ifunc (uint64_t arg1, const __ifunc_arg_t *arg2)
  44 {
  45   saved_arg1 = arg1;
  46   if (arg1 & _IFUNC_ARG_HWCAP)
  47       saved_arg2 = *arg2;
  48   return (void *) one;
  49 }
  50
  51 static int
  52 do_test (void)
  53 {
  54   TEST_VERIFY (foo () == 1);
  55   TEST_VERIFY (saved_arg1 & _IFUNC_ARG_HWCAP);
  56   TEST_COMPARE ((uint32_t)saved_arg1, (uint32_t)getauxval (AT_HWCAP));
  57   TEST_COMPARE (saved_arg2._size, sizeof (__ifunc_arg_t));
  58   TEST_COMPARE (saved_arg2._hwcap, getauxval (AT_HWCAP));
  59   TEST_COMPARE (saved_arg2._hwcap2, getauxval (AT_HWCAP2));
  60   return 0;
  61 }
  62
  63 #include <support/test-driver.c>