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35 lines
1.3 KiB
C
35 lines
1.3 KiB
C
/* __errno_location -- helper function for locating per-thread errno value
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Copyright (C) 2002-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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#if IS_IN (rtld)
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/* rtld can not access TLS too early, thus rtld_errno.
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Instead of making __open/__close pass errno from TLS to rtld_errno, simply
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use a weak __errno_location using rtld_errno, which will be overriden by the
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libc definition. */
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static int rtld_errno;
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int * weak_function
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__errno_location (void)
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{
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return &rtld_errno;
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}
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libc_hidden_weak (__errno_location)
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#else
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#include "../../../csu/errno-loc.c"
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#endif
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