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6601e61a | 1 | /* |
6d2010ae | 2 | * Copyright (c) 2010 Apple Inc. All rights reserved. |
6601e61a | 3 | * |
2d21ac55 | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
6601e61a | 5 | * |
2d21ac55 A |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License | |
8 | * Version 2.0 (the 'License'). You may not use this file except in | |
9 | * compliance with the License. The rights granted to you under the License | |
10 | * may not be used to create, or enable the creation or redistribution of, | |
11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
12 | * circumvent, violate, or enable the circumvention or violation of, any | |
13 | * terms of an Apple operating system software license agreement. | |
6601e61a | 14 | * |
2d21ac55 A |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
17 | * | |
18 | * The Original Code and all software distributed under the License are | |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
6601e61a A |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
2d21ac55 A |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and | |
24 | * limitations under the License. | |
6601e61a | 25 | * |
2d21ac55 | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
6601e61a A |
27 | */ |
28 | ||
39236c6e A |
29 | #include <TargetConditionals.h> |
30 | #include <stddef.h> | |
31 | #include <stdint.h> | |
32 | #include "tsd.h" | |
33 | ||
34 | /* | |
35 | * cerror takes the return value of the syscall, being non-zero, and | |
36 | * stores it in errno. It needs to return -1 to indicate failure but | |
37 | * 64-bit platforms need to ensure that possible 128-bit wide return | |
38 | * values are also properly set. | |
39 | */ | |
40 | #ifdef __LP64__ | |
41 | typedef unsigned __int128 cerror_return_t; | |
42 | #else | |
43 | typedef uint64_t cerror_return_t; | |
44 | #endif | |
45 | ||
46 | extern void _pthread_exit_if_canceled(int error); | |
47 | ||
48 | #undef errno | |
6d2010ae | 49 | int errno; |
39236c6e A |
50 | |
51 | int * | |
52 | __error(void) | |
53 | { | |
54 | void *ptr = _os_tsd_get_direct(__TSD_ERRNO); | |
55 | if (ptr != NULL) { | |
56 | return (int*)ptr; | |
57 | } | |
58 | return &errno; | |
59 | } | |
60 | ||
61 | __attribute__((noinline)) | |
62 | cerror_return_t | |
63 | cerror_nocancel(int err) | |
64 | { | |
65 | errno = err; | |
66 | int *tsderrno = (int*)_os_tsd_get_direct(__TSD_ERRNO); | |
67 | if (tsderrno) { | |
68 | *tsderrno = err; | |
69 | } | |
70 | return -1; | |
71 | } | |
72 | ||
73 | __attribute__((noinline)) | |
74 | cerror_return_t | |
75 | cerror(int err) | |
76 | { | |
77 | _pthread_exit_if_canceled(err); | |
78 | return cerror_nocancel(err); | |
79 | } | |
80 | ||
81 | #if !TARGET_OS_EMBEDDED | |
82 | ||
83 | // Internal symbol no longer used by anybody in Libsystem but required for | |
84 | // backwards compatibility with 3rd parties <rdar://problem/14380572> | |
85 | ||
86 | void | |
87 | cthread_set_errno_self(int err, int nocancel) | |
88 | { | |
89 | asm(".global $ld$hide$os10.9$_cthread_set_errno_self\n\t" | |
90 | ".set $ld$hide$os10.9$_cthread_set_errno_self, _cthread_set_errno_self"); | |
91 | if (nocancel) { | |
92 | cerror_nocancel(err); | |
93 | } else { | |
94 | cerror(err); | |
95 | } | |
96 | } | |
97 | ||
98 | #endif |