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/* Definition of __INDIRECT_RETURN. AArch64 version.
Copyright (C) 2024 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/>. */
#ifndef _UCONTEXT_H
# error "Never include <bits/indirect-return.h> directly; use <ucontext.h> instead."
#endif
/* __INDIRECT_RETURN indicates that swapcontext may return via
an indirect branch. This happens when GCS is enabled, so
add the attribute if available, otherwise returns_twice has
a similar effect, but it prevents some code transformations
that can cause build failures in some rare cases so it is
only used when GCS is enabled. */
#if __glibc_has_attribute (__indirect_return__)
# define __INDIRECT_RETURN __attribute__ ((__indirect_return__))
#elif __glibc_has_attribute (__returns_twice__) \
&& defined __ARM_FEATURE_GCS_DEFAULT
# define __INDIRECT_RETURN __attribute__ ((__returns_twice__))
#else
# define __INDIRECT_RETURN
#endif
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