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/*
* Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2017-2018 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#ifndef STRACE_NEGATED_ERRNO_H
# define STRACE_NEGATED_ERRNO_H
/*
* Check the syscall return value register value for whether it is
* a negated errno code indicating an error, or a success return value.
*/
static inline bool
is_negated_errno(kernel_ulong_t val)
{
kernel_ulong_t max = -(kernel_long_t) MAX_ERRNO_VALUE;
# ifndef current_klongsize
if (current_klongsize < sizeof(val)) {
val = (uint32_t) val;
max = (uint32_t) max;
}
# endif /* !current_klongsize */
return val >= max;
}
#endif /* !STRACE_NEGATED_ERRNO_H */
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