1/* Copyright (C) 2012-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <sys/auxv.h>
19#include <errno.h>
20#include <ldsodefs.h>
21#include <stdbool.h>
22
23bool
24__getauxval2 (unsigned long int type, unsigned long int *result)
25{
26#ifdef HAVE_AUX_VECTOR
27 ElfW(auxv_t) *p;
28#endif
29
30 if (type == AT_HWCAP)
31 {
32 *result = GLRO(dl_hwcap);
33 return true;
34 }
35 else if (type == AT_HWCAP2)
36 {
37 *result = GLRO(dl_hwcap2);
38 return true;
39 }
40
41#ifdef HAVE_AUX_VECTOR
42 for (p = GLRO(dl_auxv); p->a_type != AT_NULL; p++)
43 if (p->a_type == type)
44 {
45 *result = p->a_un.a_val;
46 return true;
47 }
48#endif
49
50 return false;
51}
52libc_hidden_def (__getauxval2)
53
54unsigned long int
55__getauxval (unsigned long int type)
56{
57 unsigned long int result;
58
59 if (__getauxval2 (type, &result))
60 return result;
61
62 __set_errno (ENOENT);
63 return 0;
64}
65
66weak_alias (__getauxval, getauxval)
67libc_hidden_def (__getauxval)
68