52 lines
2.0 KiB
C
52 lines
2.0 KiB
C
/*
|
|
* Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
|
|
* Copyright (c) 2017-2018 The strace developers.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#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 */
|