71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
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/* $OpenBSD: elf_aux_info.c,v 1.1 2024/07/14 09:48:48 jca Exp $ */
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/*
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* Copyright (c) 2024 Jeremie Courreges-Anglas <jca@wxcvbn.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <sys/auxv.h>
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#include <errno.h>
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extern int _pagesize;
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extern unsigned long _hwcap, _hwcap2;
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extern int _hwcap_avail, _hwcap2_avail;
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int
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elf_aux_info(int request, void *buf, int buflen)
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{
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int ret = 0;
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if (buflen < 0)
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return EINVAL;
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switch (request) {
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case AT_HWCAP:
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if (buflen != sizeof(unsigned long))
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ret = EINVAL;
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else if (!_hwcap_avail)
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ret = ENOENT;
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else
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*(unsigned long *)buf = _hwcap;
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break;
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case AT_HWCAP2:
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if (buflen != sizeof(unsigned long))
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ret = EINVAL;
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else if (!_hwcap2_avail)
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ret = ENOENT;
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else
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*(unsigned long *)buf = _hwcap2;
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break;
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case AT_PAGESZ:
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if (buflen != sizeof(int))
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ret = EINVAL;
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else if (!_pagesize)
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ret = ENOENT;
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else
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*(int *)buf = _pagesize;
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break;
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default:
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if (request < 0 || request >= AT_COUNT)
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ret = EINVAL;
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else
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ret = ENOENT;
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break;
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}
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return ret;
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}
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