Dmitry V. Levin
daaf8ab7fe
Headers updated automatically using maint/update_copyright_years.sh script.
52 lines
2.0 KiB
C
52 lines
2.0 KiB
C
/*
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* Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2017-2018 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef STRACE_NEGATED_ERRNO_H
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#define STRACE_NEGATED_ERRNO_H
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/*
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* Check the syscall return value register value for whether it is
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* a negated errno code indicating an error, or a success return value.
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*/
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static inline bool
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is_negated_errno(kernel_ulong_t val)
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{
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kernel_ulong_t max = -(kernel_long_t) MAX_ERRNO_VALUE;
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#ifndef current_klongsize
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if (current_klongsize < sizeof(val)) {
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val = (uint32_t) val;
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max = (uint32_t) max;
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}
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#endif /* !current_klongsize */
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return val >= max;
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}
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#endif /* !STRACE_NEGATED_ERRNO_H */
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