1*cf84ac9aSAndroid Build Coastguard Worker /*
2*cf84ac9aSAndroid Build Coastguard Worker * Copyright (c) 2015-2017 Dmitry V. Levin <[email protected]>
3*cf84ac9aSAndroid Build Coastguard Worker * Copyright (c) 2017-2018 The strace developers.
4*cf84ac9aSAndroid Build Coastguard Worker * All rights reserved.
5*cf84ac9aSAndroid Build Coastguard Worker *
6*cf84ac9aSAndroid Build Coastguard Worker * Redistribution and use in source and binary forms, with or without
7*cf84ac9aSAndroid Build Coastguard Worker * modification, are permitted provided that the following conditions
8*cf84ac9aSAndroid Build Coastguard Worker * are met:
9*cf84ac9aSAndroid Build Coastguard Worker * 1. Redistributions of source code must retain the above copyright
10*cf84ac9aSAndroid Build Coastguard Worker * notice, this list of conditions and the following disclaimer.
11*cf84ac9aSAndroid Build Coastguard Worker * 2. Redistributions in binary form must reproduce the above copyright
12*cf84ac9aSAndroid Build Coastguard Worker * notice, this list of conditions and the following disclaimer in the
13*cf84ac9aSAndroid Build Coastguard Worker * documentation and/or other materials provided with the distribution.
14*cf84ac9aSAndroid Build Coastguard Worker * 3. The name of the author may not be used to endorse or promote products
15*cf84ac9aSAndroid Build Coastguard Worker * derived from this software without specific prior written permission.
16*cf84ac9aSAndroid Build Coastguard Worker *
17*cf84ac9aSAndroid Build Coastguard Worker * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18*cf84ac9aSAndroid Build Coastguard Worker * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19*cf84ac9aSAndroid Build Coastguard Worker * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20*cf84ac9aSAndroid Build Coastguard Worker * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21*cf84ac9aSAndroid Build Coastguard Worker * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22*cf84ac9aSAndroid Build Coastguard Worker * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23*cf84ac9aSAndroid Build Coastguard Worker * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24*cf84ac9aSAndroid Build Coastguard Worker * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25*cf84ac9aSAndroid Build Coastguard Worker * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26*cf84ac9aSAndroid Build Coastguard Worker * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27*cf84ac9aSAndroid Build Coastguard Worker */
28*cf84ac9aSAndroid Build Coastguard Worker
29*cf84ac9aSAndroid Build Coastguard Worker #ifndef STRACE_NEGATED_ERRNO_H
30*cf84ac9aSAndroid Build Coastguard Worker #define STRACE_NEGATED_ERRNO_H
31*cf84ac9aSAndroid Build Coastguard Worker
32*cf84ac9aSAndroid Build Coastguard Worker /*
33*cf84ac9aSAndroid Build Coastguard Worker * Check the syscall return value register value for whether it is
34*cf84ac9aSAndroid Build Coastguard Worker * a negated errno code indicating an error, or a success return value.
35*cf84ac9aSAndroid Build Coastguard Worker */
36*cf84ac9aSAndroid Build Coastguard Worker static inline bool
is_negated_errno(kernel_ulong_t val)37*cf84ac9aSAndroid Build Coastguard Worker is_negated_errno(kernel_ulong_t val)
38*cf84ac9aSAndroid Build Coastguard Worker {
39*cf84ac9aSAndroid Build Coastguard Worker kernel_ulong_t max = -(kernel_long_t) MAX_ERRNO_VALUE;
40*cf84ac9aSAndroid Build Coastguard Worker
41*cf84ac9aSAndroid Build Coastguard Worker #ifndef current_klongsize
42*cf84ac9aSAndroid Build Coastguard Worker if (current_klongsize < sizeof(val)) {
43*cf84ac9aSAndroid Build Coastguard Worker val = (uint32_t) val;
44*cf84ac9aSAndroid Build Coastguard Worker max = (uint32_t) max;
45*cf84ac9aSAndroid Build Coastguard Worker }
46*cf84ac9aSAndroid Build Coastguard Worker #endif /* !current_klongsize */
47*cf84ac9aSAndroid Build Coastguard Worker
48*cf84ac9aSAndroid Build Coastguard Worker return val >= max;
49*cf84ac9aSAndroid Build Coastguard Worker }
50*cf84ac9aSAndroid Build Coastguard Worker
51*cf84ac9aSAndroid Build Coastguard Worker #endif /* !STRACE_NEGATED_ERRNO_H */
52