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2b0b8ab2 | 1 | /* Provide the runtime infrastructure for the transactional memory lib. |
8d9254fc | 2 | Copyright (C) 2011-2020 Free Software Foundation, Inc. |
e2362f5d IS |
3 | Contributed by Iain Sandoe <iains@gcc.gnu.org> |
4 | ||
5 | This file is part of GCC. | |
6 | ||
2b0b8ab2 IS |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 3, or (at your option) any later | |
10 | version. | |
e2362f5d | 11 | |
2b0b8ab2 IS |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
e2362f5d | 16 | |
2b0b8ab2 IS |
17 | Under Section 7 of GPL version 3, you are granted additional |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | You should have received a copy of the GNU General Public License and | |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
e2362f5d IS |
24 | <http://www.gnu.org/licenses/>. */ |
25 | ||
6017aed3 IS |
26 | #include "tsystem.h" |
27 | #include <stddef.h> | |
28 | #include <dlfcn.h> | |
e2362f5d | 29 | #include <mach-o/dyld.h> |
6017aed3 IS |
30 | #include <mach-o/getsect.h> |
31 | ||
32 | #ifdef __LP64__ | |
33 | #define GET_DATA_TMCT(mh,size) \ | |
34 | getsectdatafromheader_64 ((struct mach_header_64*) mh, \ | |
35 | "__DATA", "__tm_clone_table", (uint64_t *)size) | |
36 | #else | |
37 | #define GET_DATA_TMCT(mh,size) \ | |
38 | getsectdatafromheader (mh, "__DATA", "__tm_clone_table", (uint32_t *)size) | |
39 | #endif | |
e2362f5d IS |
40 | |
41 | #define WEAK __attribute__((weak)) | |
42 | ||
e2362f5d IS |
43 | extern void _ITM_registerTMCloneTable (void *, size_t) WEAK; |
44 | extern void _ITM_deregisterTMCloneTable (void *) WEAK; | |
45 | ||
6017aed3 IS |
46 | #if defined(START) || defined(END) |
47 | static inline void *getTMCloneTable (const void *f, size_t *tmct_siz) | |
48 | { | |
49 | char *tmct_fixed, *tmct = NULL; | |
50 | unsigned int i, img_count; | |
51 | struct mach_header *mh; | |
52 | Dl_info info; | |
53 | ||
54 | if (! dladdr (f, &info) || info.dli_fbase == NULL) | |
55 | abort (); | |
56 | ||
57 | mh = (struct mach_header *) info.dli_fbase; | |
58 | tmct_fixed = GET_DATA_TMCT (mh, tmct_siz); | |
59 | *tmct_siz /= (sizeof (size_t) * 2); | |
60 | /* No tm_clone_table or no clones. */ | |
61 | if (tmct_fixed == NULL || *tmct_siz == 0) | |
62 | return NULL; | |
63 | ||
64 | img_count = _dyld_image_count(); | |
65 | for (i = 0; i < img_count && tmct == NULL; i++) | |
66 | { | |
67 | if (mh == _dyld_get_image_header(i)) | |
68 | tmct = tmct_fixed + (unsigned long)_dyld_get_image_vmaddr_slide(i); | |
69 | } | |
70 | ||
71 | return tmct; | |
72 | } | |
73 | #endif | |
74 | ||
e2362f5d IS |
75 | #ifdef START |
76 | ||
77 | void __doTMRegistrations (void) __attribute__ ((constructor)); | |
78 | ||
79 | void __doTMRegistrations (void) | |
80 | { | |
6017aed3 IS |
81 | size_t tmct_siz; |
82 | void *tmct; | |
83 | ||
84 | tmct = getTMCloneTable ((const void *)&__doTMRegistrations, &tmct_siz); | |
85 | if (_ITM_registerTMCloneTable != NULL && tmct != NULL) | |
86 | _ITM_registerTMCloneTable (tmct, (size_t)tmct_siz); | |
e2362f5d IS |
87 | } |
88 | ||
89 | #endif | |
90 | ||
91 | #ifdef END | |
92 | ||
93 | void __doTMdeRegistrations (void) __attribute__ ((destructor)); | |
94 | ||
95 | void __doTMdeRegistrations (void) | |
96 | { | |
6017aed3 IS |
97 | size_t tmct_siz; |
98 | void *tmct; | |
e2362f5d | 99 | |
6017aed3 IS |
100 | tmct = getTMCloneTable ((const void *)&__doTMdeRegistrations, &tmct_siz); |
101 | if (_ITM_deregisterTMCloneTable != NULL && tmct != NULL) | |
102 | _ITM_deregisterTMCloneTable (tmct); | |
e2362f5d IS |
103 | } |
104 | ||
672ed313 | 105 | #endif |