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61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
/* Optional code to distinguish library flavours.
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Copyright (C) 2001-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jakub@redhat.com>, 2001.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _DL_LIBRECON_H
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#define _DL_LIBRECON_H 1
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static inline void __attribute__ ((unused, always_inline))
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_dl_osversion_init (char *assume_kernel)
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{
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unsigned long int i, j, osversion = 0;
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char *p = assume_kernel, *q;
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for (i = 0; i < 3; i++, p = q + 1)
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{
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j = _dl_strtoul (p, &q);
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if (j >= 255 || p == q || (i < 2 && *q && *q != '.'))
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{
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osversion = 0;
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break;
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}
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osversion |= j << (16 - 8 * i);
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if (!*q)
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break;
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}
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if (osversion)
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GLRO(dl_osversion) = osversion;
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}
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/* Recognizing extra environment variables. */
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#define EXTRA_LD_ENVVARS_13 \
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if (memcmp (envline, "ASSUME_KERNEL", 13) == 0) \
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{ \
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_dl_osversion_init (&envline[14]); \
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break; \
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}
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#define DL_OSVERSION_INIT \
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do { \
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char *assume_kernel = getenv ("LD_ASSUME_KERNEL"); \
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if (assume_kernel) \
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_dl_osversion_init (assume_kernel); \
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} while (0)
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#endif /* dl-librecon.h */
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