1 /* Test STT_GNU_IFUNC resolver with second argument.
2 Copyright (C) 2019-2021 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 #include <sys/auxv.h>
21 #include <sys/ifunc.h>
22 #include <support/check.h>
23
24 static int
one(void)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
foo_ifunc(uint64_t arg1,const __ifunc_arg_t * arg2)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
do_test(void)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>
64