| 1 | /* Copyright (C) 2012-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <sys/auxv.h> |
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| 19 | #include <errno.h> |
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| 20 | #include <ldsodefs.h> |
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| 21 | #include <stdbool.h> |
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| 22 | |
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| 23 | bool |
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| 24 | __getauxval2 (unsigned long int type, unsigned long int *result) |
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| 25 | { |
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| 26 | #ifdef HAVE_AUX_VECTOR |
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| 27 | ElfW(auxv_t) *p; |
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| 28 | #endif |
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| 29 | |
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| 30 | if (type == AT_HWCAP) |
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| 31 | { |
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| 32 | *result = GLRO(dl_hwcap); |
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| 33 | return true; |
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| 34 | } |
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| 35 | else if (type == AT_HWCAP2) |
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| 36 | { |
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| 37 | *result = GLRO(dl_hwcap2); |
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| 38 | return true; |
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| 39 | } |
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| 40 | |
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| 41 | #ifdef HAVE_AUX_VECTOR |
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| 42 | for (p = GLRO(dl_auxv); p->a_type != AT_NULL; p++) |
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| 43 | if (p->a_type == type) |
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| 44 | { |
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| 45 | *result = p->a_un.a_val; |
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| 46 | return true; |
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| 47 | } |
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| 48 | #endif |
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| 49 | |
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| 50 | return false; |
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| 51 | } |
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| 52 | libc_hidden_def (__getauxval2) |
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| 53 | |
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| 54 | unsigned long int |
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| 55 | __getauxval (unsigned long int type) |
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| 56 | { |
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| 57 | unsigned long int result; |
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| 58 | |
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| 59 | if (__getauxval2 (type, result: &result)) |
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| 60 | return result; |
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| 61 | |
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| 62 | __set_errno (ENOENT); |
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| 63 | return 0; |
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| 64 | } |
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| 65 | |
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| 66 | weak_alias (__getauxval, getauxval) |
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| 67 | libc_hidden_def (__getauxval) |
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| 68 | |
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