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/* __errno_location -- helper function for locating per-thread errno value
Copyright (C) 2002-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#if IS_IN (rtld)
/* rtld can not access TLS too early, thus rtld_errno.
Instead of making __open/__close pass errno from TLS to rtld_errno, simply
use a weak __errno_location using rtld_errno, which will be overridden by the
libc definition. */
static int rtld_errno;
int * weak_function
__errno_location (void)
{
return &rtld_errno;
}
libc_hidden_weak (__errno_location)
#else
#include "../../../csu/errno-loc.c"
#endif
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